BACKGROUND OF THE INVENTION
TECHNICAL FIELD OF THE INVENTION
[0001] The present invention relates to a lens grinding apparatus having a grinding water
storage vessel and an apparatus for treating grinding water for use therein, having
a grinding water treating means and a deodorizing means.
PRIOR ART
[0002] In a conventional apparatus for treatment of grinding water for use in a lens grinding
apparatus, (hereinafter referred to as "grinding water treating apparatus"), a grinding
water treating means which filters grinding water after used in a glasses lens grinding
work to separate grinding wastes and produce purified water and a deodorizing means
for removing an offensive smell developed in the grinding water treating means and
also developed in a grinding water storage vessel, are disposed within different housings
respectively.
[0003] A housing which contains therein the grinding water treating means, a housing which
houses therein the deodorizing means, as well as a space present above the grinding
water storage vessel and a housing with the deodorizing meane disposed therein, are
interconnected through hoses or pipes. In this case, an offensive smell is removed
through hoses or the like which connect the housings.
[0004] In the above grinding water treating apparatus, since the grinding water treating
means and the deodorizing means are disposed in different housings, the size of the
grinding water treating apparatus becomes large, thus giving rise to the problem that
it is difficult to accommodate the apparatus within a limited receptacle space.
[0005] On the other hand, when the grinding water flowing into the grinding water storage
vessel mixes into the grinding water already stored in the grinding water storage
vessel, there sometimes occurs a case where foams are formed.
[0006] To extinguish foams developed on the surface of the grinding water stored in the
grinding water storage vessel, there are known a lens grinding apparatus having a
defoaming device which injects grinding water containing a defoaming agent toward
the foams in the form of spray (shower) to remove the foams, a lens grinding apparatus
having a defoaming device which injects pressurized grinding water upward from below
the level of already-stored grinding water with use of an injection nozzle connected
to the grinding water storage vessel, a lens grinding apparatus having a foam suction
means which sucks the foams developed on the surface of grinding water, and a lens
grinding apparatus wherein a foam overflow path for overflowing the foams developed
on the grinding water surface is provided in the grinding water storage vessel.
[0007] However, there sometimes has occurred a case where grinding wastes contained in grinding
water which has been used in grinding a glasses lens adhere to the foams developed
and harden in the form of cluster.
[0008] Consequently, it is difficult to crush or suck the foams once clustered or cause
them to flow out, with consequent occurrence of the problem that the foams cannot
be extinguished to a satisfactory extent,
SUMMARY OF THE INVENTION
[0009] The present invention has been accomplished in view of the above-mentioned problems
in the conventional apparatuses and it is a first object of the invention to provide
a grinding water treating apparatus for use in a lens grinding apparatus which grinding
water treating apparatus permits both grinding water treating means and deodorizing
means to be received within a limited receptacle space and thus permits reduction
of the receptacle space.
[0010] It is a second object of the present invention to provide a lens grinding apparatus
capable of suppressing the formation of foams when grinding water flowing into a grinding
water storage vessel mixes into grinding water already stored in the vessel.
[0011] According to the present invention, for achieving the above first object, there ie
provided a grinding water treating apparatus for use in a lens grinding apparatus,
comprising a grinding water treating means which filters grinding water after use
in grinding a glasses lens to separate grinding wastes and produce purified water
and a deodorizing means for removing an offensive smell developed in the grinding
water treating means and also in a grinding water storage vessel, the grinding water
treating means and the deodorizing means being disposed within one and same housing.
[0012] The grinding water treating means may be constructed so as to have a one-pass treating
means which causes the grinding water to pass once therethrough to filter off grinding
wastes.
[0013] The one-pass treating means may be constructed so as to have a pressurizing means
which applies a predetermined pressure to the grinding water treating means to squeeze
out and filter grinding water from grinding wastes present within the grinding water
treating means. thereby permitting the grinding wastes to be treated at a time.
[0014] The grinding water treating means may be constructed such that a purified water recycle
hose for returning the purified water to the grinding water storage vessel is provided,
and an injection means is provided at a tip portion of the purified water recycle
hose to inject the purified water, causing the purified water to mix into the grinding
water flowing into the grinding water storage vessel and thereby extinguishing foams
formed on the surface of the grinding water stored in the grinding water vessel.
[0015] Moreover, the grinding water treating means may be constructed such that a purred
water recycle hose for returning the purified water to the grinding water storage
vessel is provided, and an injection means is provided at a tip portion of the purified
water recycle hose to inject the purified water radially, allowing the purified water
to cover the surface of the grinding water already stored in the grinding water storage
vessel and thereby extinguishing foams formed on the surface of the grinding water
stored in the grinding water storage vessel.
[0016] Further, there may be adopted a construction wherein the portion where the grinding
water flowing into the grinding water storage vessel strikes against the grinding
water already stored in the grinding water storage vessel is covered with the purified
water injected from the purified water recycle hose.
[0017] According to the present invention, for achieving the foregoing second object, there
is provided a lens grinding apparatus comprising a grinding water storage vessel for
the storage of grinding water which has been used in grinding a glasses lens and a
grinding water supply hose for allowing the grinding water to flow into the grinding
water storage vessel, wherein an injection means is provided at a tip portion of the
grinding water supply hose to inject the grinding water radially, thereby allowing
the grinding water to cover the surface of the grinding water already stored in the
grinding water storage vessel and extinguishing foams formed on the surface of the
grinding water,
BRIEF DESCRIPTION OF THE DRAWINGS
[0018]
FIG. 1 is an explanatory piping diagram showing schematically a lens grinding apparatus
and a grinding water treating apparatus according to a first embodiment of the present
invention;
FIG. 2 is an explanatory piping diagram showing schematically a lens grinding apparatus
and a grinding water treating apparatus according to a second embodiment of the present
invention
FIG. 3 is an explanatory diagram (a left-hand side view of a support base shown in
FIG. 2) showing an example of utilization of the support base illustrated in FIG. 2;
FIG. 4 is a schematic explanatory diagram showing a lens grinding apparatus and a
grinding water treating apparatus according to a modification of the second embodiment
of the present invention;
FIG. 5 is an explanatory piping diagram of the grinding water treating apparatus shown
in FIG. 4;
FIG. 6 is an exploded perspective view of a deodorizing device shown in FIG. 4;
FIG. 7 is a diagram explanatory of operation of the deodorizing device shown in FIG.
6;
FIG. 8(a) is a sectional view of a screw inserting cylinder portion in a deodorizing
case;
FIG. 8(b) is a sectional view of a partition wall portion in the deodorizing case;
FIG. 8(c) is a sectional view taken along line B-B in FIG 8(b);
FIG. 8(d) is a sectional view taken along line C-C in FIG. 8(b);
FIG. 9 is an explanatory piping diagram of components of the lens grinding apparatus
shown in FIG. 4;
FIG. 10 is an explanatory diagram showing the flow of grinding water;
FIGS. 11(a) to 1 are explanatory diagrams of an operating panel shown in FIG. 4;
FIG. 12 is a diagram explanatory of a grinding water non-recycle treatment in the
grinding water treating apparatus shown in FIG. 4,
FIG. 13 is an explanatory piping diagram showing schematically a lens grinding apparatus
and a grinding water treating apparatus according to a third embodiment of the present
invention;
FIG. 14 is an explanatory piping diagram of the grinding water treating apparatus
shown in FIG. 13;
FIG. 15 is an explanatory piping diagram of components of the lens grinding apparatus
shown in FIG. 13;
FIG. 16 is an explanatory diagram showing the flow of grinding water;
FIG. 17 is an enlarged explanatory diagram of portion D shown in FIG. 15;
Fig, 18 is a graph showing results of valuation of the grinding water treating apparatus
according to the third embodiment; and
FIG. 19 is an enlarged explanatory diagram of a lens grinding apparatus according
to a fourth embodiment of the present invention,
Fig. 20 is a sectional view showing the other example of the deodorizing case.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0019] Some preferred embodiments of the present invention will be described in detail with
reference to the accompanying drawings hereinafter.
[First Embodiment]
[0020] A first embodiment of the present invention will be described below.
<Constuction>
[0021] In FIG. 1, reference numeral 1 denotes a lens grinding apparatus, numeral 2 denotes
an apparatus support base for supporting the lens grinding apparatus, and numeral
3 denotes a grinding water tank (grinding water storage vessel) disposed under the
apparatus support base 2. A grinding water supply pump 4 is installed in the interior
of the grinding water tank 3. Numerals 4a and 4b denote a suction port and a discharge
port, respectively, of the grinding water supply pump 4. One port 6a of a three-way
change-over valve 5 is connected to the discharge port 4b of the grinding water supply
pump 4.
[0022] Numerals 5b and 5c denote the other two ports of the three way change-over valve
5 and numeral 5d denotes a change-over lever in the three-way change-over valve 5.
By switching the change-over lever 5d in the three-way change-over valve 5 to the
port 5b side, the ports 5a and 5b come into communication with each other and at the
same time the communications between the ports 5a, 5b and the port 5c are cut off.
Further, by switching the change-over lever 5d in the three-way change-over valve
5 to the port 5c side, the ports 5a and 5c come into communication with each other
and at the same time the communications between the ports 5a, 5c and the port 5b are
cut off
[0023] A support base 6 as a housing is disposed sideways of the apparatus support base
2. On the support base 6 is mounted a grinding water treating apparatus 7, while under
the support base 6 is disposed a grinding water storage vessel 8 (e.g., a bucket).
[0024] The grinding water treating apparatus 7 is provided with a grinding water treating
means and a deodorizing means
[0025] A grinding water treating section (grinding water treating means) 7a has a bottomed,
cylindrical, transparent (or translucent) separating vessel body (pressure-resistant
vessel) 9, a bottomed, cylindrical, transparent (or translucent) grinding wastes separating
filter 10 (one-pass treating means) disposed within the separating vessel body 9,
a lid 11 which closes an upper-end opening of the separating vessel body 9, a packing
12 interposed between the lid 11 and the separating vessel body 9, fixing screws 13
which fix the lid 11 to the separating vessel body 9, and a lever 14 for performing
the fixing operation of the fixing screws 13 and for canceling the same operation.
[0026] The grinding water treating section 7a is further provided with a feed port 15 connected
to the upper end portion of the separating vessel body 9, a drain port 16 formed in
a bottom of the separating vessel body 9, and a three-way change-over valve 17 one
port 17a of which is connected to the feed port 15.
[0027] Numerals 17b and 17c denote the other two ports of the three-way change-over valve
17, and numeral 17d denotes a change-over lever in the three-way change-over valve
17.
[0028] In the three-way change-over valve 17, by switching the change-over lever 17d to
the port 17b side the ports 17a and 17b come into communication with each other and
at the same time the communications between the ports 17a, 17b and the port 17c are
cut off. Further, by switching the change-over lever 17d in the three-way change-over
valve 17 to the port 17c side the ports 17a and 17c come into communication with each
other and at the same time the communications between the ports 17a, 17c and the port
17b are cut off.
[0029] A grinding Water supply nozzle (not shown), which is disposed within the lens grinding
apparatus 1, is connected to the port 5b of the three-way change-over valve 5 through
a grinding water supply hose 18. In the lens grinding apparatus 1, a grinding wheel
(not shown) is rotated at high speed to grind a lens to be ground (unground circular
glasses lens) into a glasses lens shape (globe shape).
[0030] For the grinding work, the grinding water stored in the grinding water tank 3 is
pumped up by the grinding water supply pump 4 and is fed to the nozzle (not shown)
in the lens grinding apparatus 1 through both three-way change-over valve 5 and grinding
water supply hose 18, then is fed from the nozzle to a lens grinding section using
the grinding wheel to cool the grinding section and waah away grinding wastes. For
this grinding work there is used a known construction, so the details thereof will
here be omitted.
[0031] The grinding water which has thus washed away the grinding wastes is allowed to flow
down together with the grinding wastes through a bottom of the lens grinding apparatus
1 and further through a drain hose 19 into the grinding water tank 3.
[0032] Further, an air compressor (a pressurizing means, a compressed air supply means,
i.e., a compressed gas supply means) 20 is connected to the port 17b of the three-way
change-over valve 17 through an air hose 21, and the port 5c of the three-way change-over
valve 5 and the port 17 of the three-way change-over valve 17 are connected together
through a grinding water supply hose 22. The grinding water supply hose 22 is attached
to the port 17c removably.
[0033] The deodorizing means is a deodorizing device (not shown) disposed in a space formed,
for example, under the grinding water treating section 7a and inside the support base
6.
<Operation>
[0034] The following description is now provided about the lens grinding apparatus 1 and
the grinding water treating apparatus 7 both constructed as above.
Washing Away Grinding Wastes in Grinding Work
[0035] In the above construction, first the change-over lever 5d of the three-way change-over
valve 5 is switched to the port 6b side, allowing the ports 5a and 5b to come into
communication with each other and blocking the communication between the ports 5a,
5b and the port 5c. In this state, the grinding wheel (not shown) in the lens grinding
apparatus 1 is rotated at high speed to grind the to-be-ground lens into a glasses
lens shape (globe shape).
[0036] At this time, the grinding water stored in the grinding water tank 3 is pumped up
by the grinding water supply pump 4 and is fed to the nozzle (not shown) in the lens
grinding apparatus 1 through the three way change-over valve 5 and the grinding water
supply hose 18, then is fed from the nozzle to the lens grinding section using the
grading wheel to cool the grinding section and wash away grinding wastes, The grinding
water which has thus washed away the grinding wastes is allowed to flow down together
with the grinding wastes from the bottom of the lens grinding apparatus 1 to the grinding
water tank 3 through the drain hose 19.
Separating Grinding Wastes
[0037] When the grinding water stored in the grinding water tank 3 becomes somewhat turbid
due to the grinding wastes in the lens grinding work by the lens grinding apparatus
1, the work is stopped. Then, the change-over lever 5d of the three-way change-over
valve 5 is switched to the port 5c side to establish communication between the ports
5a and 5c. Further, the change-over lever 17d of the three-way change-over valve 17
is switched to the port 17c side to establish communication between the ports 17a
and 17c.
[0038] In this state, the grinding water supply pump 4 is activated to supply the grinding
water stored in the grinding water tank 3, together with grinding wastes, into the
grinding wastes separating filter 10 in the grinding water treating apparatus 7 through
the three-way change-over valve 5, grinding water supply hose 22 and three-way change-over
valve 17. As a result, the grinding water passes through the grinding wastes separating
filter 10, flows down from the drain port 16 and is stored in the grinding water storage
vessel 8. At this time, the grinding wastes contained in the grinding water are collected
by the grinding wastes separating filter 10.
[0039] When the grinding wastes are collected to a certain extent within the grinding wastes
separating filter 10 and the amount of grinding water flowing down into the grinding
water storage vessel 8 decreases, the filter 10 is clogged and hence the grinding
water in the filter is difficult to flow,
[0040] As the degree of clogging of the grinding wastes separating filter 10 becomes higher,
the internal pressure of the filter 10 tends to become higher due to the grinding
water supplied. In this connection there may be adopted a construction wherein an
infra-vessel sensor (not shown) is disposed in an upper portion (e.g., on a lower
surface of the lid 11) within the separating vessel body 9 to detect a clogged state
of the grinding wastes separating filter 10, and when the internal pressure of the
filter 10 has become higher than a predetermined value, this state is displayed for
example by an LED (not shown) on the basis of a pressure detection signal provided
from the intra-vessel pressure sensor (not shown) to let a worker know this state.
[0041] In this case, therefore, after the operation of the grinding water supply pump 5
is stopped, the change-over lever 17d of the three-way change-over valve 17 is switched
to the port 17b side to establish communication between the ports 17a and 17b and
block communications between the ports 17a, 17b and the port 17c. Thereafter, the
air compressor 20 is turned ON to supply compressed air to above the grinding wastes
separating filter 10 through the air hose 21 and the three-way change-over valve 17.
As a result, under the action of the air pressure, grinding water which has been staying
on an upper portion of the grinding wastes in the grinding wastes separating filter
10 passes through the grinding wastes and the filter 10 and flows down into the grinding
water storage vessel 8 through the drain port 16.
[0042] When there is little grinding water flowing down from the drain port 16, the air
compressor 20 is turned OFF and the fixed state of the lid 11 to the separating vessel
body 9 by the fixing screws 13 is cancelled by operating the lever 14. Thereafter,
the lid 11 is removed from the separating vessel body 9, the grinding wastes separating
filter 10 is taken out from the interior of the separating vessel body, and the grinding
wastes present within the filter 10 are discarded.
[0043] When the degree of turbidity is low, the grinding water present in the grinding water
storage vessel 8 is returned to the grinding water tank 3 for use in the grinding
work, while when the degree of turbidity is high, the grinding water is discarded
by flowing it to sewage for example.
[0044] Turbid grinding water and grinding wastes present in the grinding water tank 3 are
treated by repeating such a process.
[0045] Although in the above embodiment the ports of the three-way change-over valves 6
and 17 are switched from one to another by manual operating levers 5d and 17d, this
does not always constitute a limitation.
[0046] For example, there may be adopted a construction wherein a turbidity sensor for detecting
the state of turbidity in the interior of the grinding water tank 3 is provided, and
when a somewhat progressed state of turbidity is detected by the turbidity sensor,
the state of connection of each port in the three-way change-over valve 5 and 17 is
switched over automatically in the same way as above and there is performed the grinding
wastes separating work by the grinding water treating apparatus 7.
[0047] Or there may be adopted a construction. wherein the grinding wastes separating work
involving such switching of the connection condition among the ports of the three'way
change-over valves 5 and 17 is done automatically at every predetormined grinding
time.
[0048] As described above, the grinding water treating apparatus (7) according to this first
embodiment is provided with the grinding water treating means (grinding water treating
section 7a) which filters grinding water having been used in the lens grinding work
to separate grinding wastes and produce purified water and the deodorizing means (deodorizing
device (not shown)) for removing an offensive smell present in the interior of the
grinding water treating means (7a) and the grinding water storage vessel (storage
tank 3), the grinding water treating means (7a) and the deodorizing means (not shown)
being disposed within the same housing (support base 6).
[0049] With this construction, the grinding water treating apparatus (7) provided with both
grinding water treating means (7a) and deodorizing means (not shown) can be accommodated
within a limited receptacle space and hence it is possible to reduce the receptacle
space,
[0050] In the grinding water treating apparatus (7) according to this first embodiment,
the grinding water treating means (7a) has a one-pass treating means (the grinding
wastes separating filter 10) for passing grinding water once therethrough to filter
off grinding wastes.
[0051] According to this construction, grinding water (purified water) after the filtration
does not return to the grinding water storage vessel (3), but filtered water high
in clarity can be drained directly to the sewerage.
[0052] Further, in the grinding water treating apparatus (7) according to this first embodiment,
the one-pass treating means (10) has a pressurizing means (the air compressor 20)
which applies a predetermined pressure to the grinding water treating means (7a) to
squeeze out and filter grinding water from grinding wastes present within the grinding
water treating means (7a), thereby permitting the grinding wastes to be treated at
a time.
[0053] According to this construction, even if the one-pass treating means (10) is clogged,
the grinding water present therein can be separated from the grinding wastes quickly,
easily and positively, permitting easy discard of only the grinding wastes.
[Second Embodiment]
[0054] A second embodiment of the present invention will be described below.
<Construction>
[0055] In FIG. 2, the numeral 1 denotes a lens grinding apparatus, numeral 2 denotes an
apparatus support base for supporting the lens grinding apparatus 1, and numeral 3
denotes a grinding water tank (grinding water storage vessel) disposed under the apparatus
support base 2. With a partition filter 23, the interior of the grinding water tank
3 is partitioned into a purified grinding water chamber (purified water chamber) 3a
and a discharged grinding water chamber (waste water chamber) 3b.
[0056] In the purified grinding water chamber 3a is disposed a purified water recycle pump
24, while in the discharged grinding water chamber 3b is disposed a discharged grinding
water pump 26. A discharge side of the purified water recycle pump 24 and a grinding
water supply nozzle (not shown) disposed within the lens grinding apparatus 1 are
connected together through a purified grinding water supply hose 26.
[0057] In the lens grinding apparatus 1, a grinding wheel (not shown) is rotated at high
speed to grind a lens to be ground (unground circular glasses lens) into a glasses
lens shape (globe shape).
[0058] In this grinding work, purified water present within the purified grinding water
chamber 3a is pumped up by the purified water recycle pump 24 and is fed through the
purified grinding water supply hose 26 to the nozzle (not shown) disposed within the
lens grinding apparatus 1, then is fed from this nozzle to a lens grinding section
using the grinding wheel to cool the grinding section and wash away grinding wastes,
As a construction for such a grinding work there is used a known one, so a detailed
description thereof will here be omitted.
[0059] Grinding water ("discharged grinding water" hereinafter) after thus washing away
of grinding wastes is allowed to flow down together with the grinding wastes into
the discharged grinding water chamber 3b in the grinding water tank 3 from a bottom
of the lens grinding apparatus 1 through a grinding water discharge hose (grinding
water supply hose) 19.
[0060] Sideways of the apparatus support base 2 is disposed a grindine water treating apparatus
27 which is installed on a support base (housing) 28 with caster. As will be described
later, the grinding water treating apparatus 27 is provided with a grinding water
treating means which filters discharged grinding water to separate grinding wastes
and produce purified grinding water ("purified water" hereinafter) and a deodorizing
means for removing an offensive smell developed within the grinding water treating
means, etc.
[0061] A grinding water treating section (grinding water treating means) 27a has a bottomed
cylindrical separating vessel body (pressure-resistant vessel) 9 and a bottomed cylindrical
grinding wastes separating filter (one-pass means) 10 disposed within the separating
vessel body 9. The grinding water treating section 27a is also provided with a lid
11 which closes an upper-end opening of the separating vessel body 9, a packing 12
interposed between the lid 11 and the upper end of the separating vessel body 9, fixing
screws 13 which fix the lid 11 to the separating vessel body 9, and a lever 14 for
performing the fixing operation of the fixing screws 13 and canceling the same operation.
[0062] The grinding water treating section 27a is further provided with a feed port 15 connected
to the upper end portion of the separating vessel body 9 and a drain port 16 provided
in a lower portion of the separating vessel body 9.
[0063] An opening/closing valve (not shown) is provided in each of the feed port 15 and
drain port 16. Numerals 15a and 16a denote open/close operating lever for the opening/closing
valve (not shown) in the feed port 15 and drain port 16.
[0064] One end of a grinding water discharge hose 30 is connected to a discharge port (not
shown) of the grinding water discharge pump 25, while an opposite end of the grinding
water discharge hose 30 is connected to the feed port 15 removably with use of a connector
or a screw.
[0065] On the other hand, one end of a purified water recycle hose 31 is connected to the
drain port 16 removably with use of a connector or a screw and an opposite end thereof
is held in an upper portion of the purified grinding water chamber 3a in the grinding
water tank 3 removably with use of a connector or a screw. As fixing means for the
connector or screw there may be used a known connector or nut used for the connection
of hose.
[0066] Further, the deodorizing means has a deodorizing device 32 (see FIG. 3) disposed
under the separating vessel body 9.
<Operation>
[0067] Next, a description will be given below of the operation of the lens grinding apparatus
1 and the grinding water treating apparatus 27 both constructed as above.
Washing Away Grinding Wastes in Grinding Work
[0068] In the above construction, the opening/closing valves (not shown) disposed in the
feed port 15 and the drain port 16 are opened by operating the open/clone operating
levers 15a and 16a and in this state a grinding wheel (not shown) in the lens grinding
apparatus 1 is rotated at high speed to grind a to-be-ground lens into a glasses lens
shape (globe shape).
[0069] At this time, purified water present within the purified grinding water chamber 3a
in the purified water tank 3 is pumped up by the purified water recycle pump 24 and
is fed through the purified grinding water supply hose 26 to the nozzle (not shown)
disposed within the lens grinding apparatus 1, than is fed from the nozzle to the
lens grinding section using the grinding wheel to cool the grinding section and wash
away grinding wastes.
[0070] The purified water after thus washing away of grinding wastes becomes discharged
grinding water and is allowed to flow down together with the grinding wastes from
the bottom of the lens grinding apparatus 1 into the discharged grinding water chamber
3b in the grinding water tank 3 through the grinding water discharge hose 19.
Separating Grinding Wastes (Grinding Water Treatment)
[0071] In such a grinding work, the grinding water discharge pump 25 sucks the discharged
grinding water from the interior of the discharged grinding water chamber 3b in the
grinding water tank 3 together with grinding wastes and supplies the discharged grinding
water containing the grinding wastes into the grinding wastes separating filter 10
through the grinding water discharge hose 30 and the feed port 15. A single pump may
be used in common to both purified water recycle pump 24 and grinding water discharge
pump 25.
[0072] The discharged grinding water is separated from the grinding wastes by the grinding
wastes separating filter 10 and becomes purified water, which is returned into the
purified grinding water chamber 3a in the grinding water tank 3 through the drain
port 16 and the purified water recycle hose 31. At this time, the grinding wastes
separating filter 10 collects the grinding wastes contained in the discharged grinding
water.
Discarding Grinding Wastes
[0073] When the grinding wastes are collected to a certain extent by the grinding wastes
separating filter 10 and the amount of the discharged grinding water filtered by the
grinding wastes separating filter 10 decreases, the purified water recycle pump 24
and the grinding water discharge pump 25 are turned OFF and thereafter the lever 14
is operated to cancel the fixed state of the lid 11 to the separating vessel body
9 by the fixing screws 13.
[0074] Subsequently, the lid 11 is removed from the separating vessel body. 9, the grinding
wastes separating filter 10 is taken out from the interior of the separating vessel
body 9, and the grinding wastes collected in the filter 10 are discarded. Then, the
filter 10 is returned to the separating vessel body 9 and the vessel body 9 is closed
with the lid 11 by reversing the above operation, thereafter, the foregoing "grinding
work" and "grinding water treatment" are allowed to proceed. Subsequently, such a
grinding water-grinding wastes separating work is performed repeatedly.
[0075] In such a grinding water treatment, if the discharged grinding water filtering capacity
of the grinding wastes separating filter 10 is deteriorated, the grinding wastes collected
by the grinding wastes separating filter 10 may be discarded as described above after
squeezing out purified water from the grinding wastes by the air compressor (pressurizing
moans) (not shown) and subsequent drainage thereof from the drain port 16.
Discarding Grinding Water
[0076] If the purified water is somewhat turbid even after the application of such a grinding
water treatment, there may be adopted a method involving removing the purified water
recycle hose 31 from the grinding water tank 3, connecting the hose 31 to a sewer
(not shown), and carrying out the foregoing grinding water treatment, whereby purified
water free of grinding wastes can be discarded to the sewer. Alternatively, there
may be adopted a method wherein the purified water recycle hose 31 is disconnected
from the drain port 16, while a drain hose (not shown) connected to the sewer is attached
to the drain pore 16, and the foregoing grinding water treatment is carried out, thereby
allowing turbid purified water free of grinding wastes to be discharged to the sewer.
Others
[0077] By allowing such a recycle type grinding water treatment to be carried out by the
grinding water treating section 27a, there is formed a apace under the support base
28 and therefore such a deodorizing device (deodorizing means) 82 as shown in FIG.
3 is disposed in the said space.
[0078] With the deodorizing device 32, it is possible to remove an offensive smell (e.g.,
an offensive smell developed when grinding a plastic lens) developed within the lens
grinding apparatus 1 and the grinding water tank 3.
[0079] As described above, the grinding water treating apparatus (27) according to this
second embodiment is provided with the grinding water treating means (grinding water
treating section 27a) which filters grinding water after used in grinding a glasses
lens to separate grinding wastes and produce purified water and the deodorizing means
(deodorizing device 32) for removing an offensive smell developed in both grinding
water treating means (27a) and grinding water storage vessel (storage tank 3), the
grinding water treating means (27a) and the deodorizing means (32) being disposed
within the same housing (support base 28).
[0080] According to this construction, the grinding water treating apparatus (27) provided
with both grinding water treating means (27a) and deodorizing means (not shown) can
be accommodated within a limited receptacle space, thus permitting reduction of the
receptacle space.
[0081] In the grinding water treating apparatus (27) according to this second embodiment,
the grinding water treating means (27a) has the one-pass treating means (grinding
wastes separating filter 10) which causes grinding water to pass once therethrough
to filter off grinding wastes.
[0082] According to this construction, grinding water (purified water) after the filtration
does not return to the grinding water storage vessel (3), but filtered water high
in clarity can be discharged as it is to the sewer.
[Modification]
[0083] A modification of the above second embodiment will be described below with reference
to PIGS. 4 to 13, in which the same portions as in the second embodiment are identified
by the same reference numerals as in the second embodiment.
[0084] In FIG. 4, numeral 1 denotes a lens grinding apparatus, numeral 2 denotes a rack
like apparatus support base which supports the lens grinding apparatus 1, and numeral
3 denotes a grinding water tank (grinding water storage vessel) disposed under the
apparatus support base 2.
[0085] As shown in FIGS. 5 and 9, the interior of the grinding water tank 3 is partitioned
to a purified grinding water chamber (purified water chamber) 3a and a discharged
grinding water chamber (waste water chamber) 3b by means of a partition filter 23.
[0086] As the partition filter 23 is used a 100µ filter lest grinding dust should enter
a deodorizing device (to prevent the passage of grinding wastes). Through this filter
the purified grinding water chamber 3a and the discharged grinding water chamber 3b
are in communication with each other while preventing the passage of grinding wastes,
and the quantities of water stored in the two are almost equal to each other.
[0087] A purified water recycle pump 24 is disposed in the purified grinding water chamber
3a, while a grinding water discharge pump 25 is disposed in the discharged grinding
water chamber 3b. A discharge side of the purified water recycle pump 24 and a grinding
water supply nozzle 1a disposed in the lens grinding apparatus 1 are connected with
each other through a purified grinding water supply hose 26 as shown in FIG. 8.
[0088] One end of a grinding water discharge hose 30 is connected to a discharge port (discharge
side) of the grinding water discharge pump 26, and a connecting pipe 30a is attached
to an opposite end of the grinding water discharge hose 30.
[0089] One end of a purified water recycle hose 31 is put in communication with the purified
grinding water chamber 3a, and a connecting pipe 31a is attached to an opposite end
of the purified water recycle hose 31.
[0090] In the lens grinding apparatus 1, as shown in FIG. 9, a grinding wheel 1b is rotated
at high speed to grind a lens to be ground (unground circular glasses lens) L into
a glosses lens shape (globe shape).
[0091] In the grinding work, purified water present in the purified grinding water chamber
3a is pumped up by the purified water recycle pump 24 and is fed through the purified
grinding water supply hose 26 to a nozzle 1a disposed within the lens grinding apparatus
1, then is fed from the nozzle 1a to a grinding section A which is for grinding the
lens L with the grinding wheel 1b, to cool the grinding section A and wash away grinding
wastes (see FIG. 9). For such a grinding work there is used a known construction,
so a detailed explanation thereof will here be omitted.
[0092] Purified water after thus washing away of grinding wastes becomes discharged grinding
water, which is allowed to flow down together with grinding wastes from a bottom of
the lens grinding apparatus 1 into the discharged grinding water chamber 3b in the
grinding water tank 3 through the grinding water discharge hose 19.
[0093] Further, sideways of the apparatus support base 2 is disposed a body case 40 with
caster as a housing corresponding to the support base 28 shown in FIG, 2, and a grinding
water treating apparatus 27 is disposed within the body case 40 (see FIG. 4). The
grinding water treating apparatus 27 is provided with a grinding water treating means
and a deodorizing means.
[0094] At a front upper portion of the body case 40 is formed a front upper projection 41
which projects to the front side, while in a front lower portion of the body case
40 is formed a front opening 42 as shown in FIGS. 4 and 6, which in closed with a
front lid 43 as in FIG. 4.
[0095] A grinding water treating section (grinding water treating means) 27a has a bottomed,
cylindrical, separating vessel body (pressure-resistant vessel) 9 embedded in an upper
portion of the body case 40 and a bottomed, cylindrical, grinding wastes separating
filter 10 (one-pass means) disposed within the separating vessel body 9.
[0096] As shown in FIG, 4, an upper-end opening of the separating vessel body 9 is closed
with a lid 11, and a packing 12 is interposed between the lid 11 and the upper end
of the separating vessel body 9 to ensure the interior of the vessel body in a hermetically
sealed state. The lid 11 is fixed to the separating vessel body 9 with fixing screws
13. Numeral 14 denotes a lever for performing the fixing operation of the fixing screws
13 and for canceling the same operation,
[0097] Further, a feed port 15 is connected to the upper end portion of the separating vessel
body 9, while a drain port (lower drain port) 16 and a drain port (upper drain port)
16' are formed at different heights in a lower portion of the separating vessel body
9.
[0098] As shown in FIG. 5, a connecting pipe 44 for the supply of water and a connecting
pipe 45 for the supply of air are attached to a vertically intermediate portion of
a rear wall 40a of the body case 40, and a hose connecting pipe 46 is attached to
a lower end portion of the rear wall 40a. Moreover, as shown in FIGS. 4 and 5, a connecting
pipe 16b for drainage is attached to a lower surface of the front upper projection
41 of the body case 40.
[0099] To the feed port 16, as shown in FIG. 9, are connected not only the connecting pipe
44 through an opening/closing valve 47 but also the connecting pipe 45 through an
air regulator 48 and an opening/closing valve 49.
[0100] Further, the drain port 16 and the connecting pipe 16b for drainage are connected
with each other through a drain pipe 16c and an opening/closing valve 50. The opening/closing
valve 47 has an operating shaft 47a projecting upward from an upper wall 40b of the
body case 40 and an open/close operating lever 47b which is integral with the operating
shaft 47a. The opening/closing valve 49 has an operating shaft 49a projecting upward
from the upper wall 40b of the body case 40 and an open/close operating lever 49b
which is integral with the operating shaft 49a.
[0101] The opening/closing valve 50 has an operating shaft 50a projecting from the front
side of the front upper projection 41 of the body case 40 and an open/close operating
lever 50b which is integral with the operating shaft 50a.
[0102] One end of a drain pipe 16d is connected to the drain port 16', one end of a drain
pipe 16e is connected halfway of a drain pipe 16c, and an opening/closing valve 90
is connected between opposite ends of the drain pipes 16c and 16c. The opening/closing
valve 90 has an operating shaft 90a projecting upward from the upper wall 40b of the
body case 40 and an open/close operating lever 90b which is integral with the operating
shaft 90a.
[0103] Besides, the connecting pipe 30a of the grinding water discharge hose 30 is connected
to the connecting pipe 44 removably and the connecting pipe 31a of the purified water
recycle hose 31 is connected to the connecting pipe 16b removably. Further, the air
pump 20 is disposed sideways of the grinding water treating apparatus 27 and one end
of an air hose 21 is connected to an air discharge side of the air pump 20, while
a connecting pipe 21a is connected to an opposite end of the air hose 21. The connecting
pipe 21a is also connected to the connecting pipe 45 removably.
[0104] The connecting pipes 30a and 44, the connecting pipes 31a and 16b, and the connecting
pipes 21a and 46, constitute pipe joints (connecting means), respectivoly. As such
pipe joints there are used pipe connecting couplers capable of being mounted and removed
in a one-touch manner. A hose hook (retaining hook) HF is attached to the connecting
pipe 31a. The hose hook HF is provided so that it can be engaged in a hose hook hole
(hook retaining hole, retaining means) 40c formed in a side face (see FIG. 5) of the
body ease 40.
[0105] As shown in FIG. 4, a deodorizing device (deodorizing means) 51 is disposed in a
lower portion within the body case 40. As shown in FIG. 7, the deodorizing device
51 has a deodorizing device body 52 and a small-sized blower (a motor-operated blower)
53 which exerts a negative suction pressure on the deodorizing device body 52.
[0106] As shown in FIGS. 7 and 8(a), the deodorizing device body 52 has a deodorizing case
64 and a holding plate 55 attached to the bottom wall 40b of the body case 40.
[0107] The deodorizing case 54 has a cylindrical case 56, end walls
57, 58 provided at both ends of the cylyndrical case 56, and a screw inserting cylinder
59 of a small diameter fixed at both ends to the end walls 57 and 58, In the end wall
57 are formed an air inlet 60 and an air outlet 61.
[0108] The deodorizing case 54 has a partition wall 62 which partitions one end side (end
wall 57 side) of the interior of the cylindrical case 66 into right and left compartments
as in FIGS. 8(b) and 8(c). In this construction, the right and left portions in the
cylindrical case 56 are in communication with portion located between the partition
wall 62 and the end wall 58 (see FIGS. 8(c) and 8(d)).
[0109] Besides, the deodorizing device body 52 has activated charcoal 63 filled. within
the deodorizing case 54 and a filter 64 disposed within the air inlet 60.
[0110] Further, in the holding plate 55 are formed a hose connecting port 65, a tapped hole
66, and a blower communicating port 67. The blower 53 is attached to the holding plate
55 and an air suction port (not shown) of the blower 3 is in communication (connection)
with the blower communication port 67.
[0111] The deodorizing device body 52 is installed within the body case 40 by grasping a
peripheral edge portion (handle portion) of the end wall 58 projecting from the cylindrical
case 56 and then inserting the deodorizing case 54 into the body case 40 through the
front opening 42.
[0112] Thus, by disposing the deodorizing device 51 within the body case 40, the grinding
water treating section 27a as grinding water treating means provided on top of the
body case 40 and the deodorizing device 51 as deodorizing means are both inserted
into the same body case (housing) 40.
[0113] In this inserting operation, the air inlet 60, the screw inserting cylinder 59, and
the air outlet 61 in the deodorizing case 54 are brought into opposition to the hose
connecting port 66, the tapped hole 66, and the blower communication port 67, respectively,
which are formed in the holding plate 55, and one end of the deodorizing case 54 is
brought into abutment against the holding plate 55.
[0114] In this state, a fixing screw 68 is inserted through the front lid (lid) 43 into
the screw inserting cylinder 59 and its tip portion is threadedly engaged with the
tapped hole 66, whereby the deodorizing device body 52 and the holding plate 55 are
fixed and the front lid 43 is fixed to the body case 40 in a closed state of the front
opening 42. The hose connecting port 65 and the hose connecting pipe 46 are connected
with each other through a transparent air hose 69.
[0115] A window 70 for visually checking the air hose 69 is formed in the upper wall 40b
of the body case 40 and is covered with a transparent cover (window glass) 71. In
FIGS. 9 and 12, the numeral 8 denotes a grinding water storage vessel such as a bucket
for example which can be installed as necessary.
[0116] An air hose 46a is interposed between the hose connecting port 46 and an upper space
of the purified grinding water chamber 3a in the grinding water tank 3. More specifically,
one end of the air hose 46a is connected into the upper space of the purified grinding
water chamber 3a, while an opposite end of the air hose 46a is attached to the hose
connecting port 46 (see FIG. 9).
[0117] Further, an operating panel 72 is provided at a front upper portion of the support
base 2, and as shown in FIG. 11. a push-button switch 73 for dehydration, a push-button
switch 74 for deodorization, and a push-buttbn switch 75 for filtration, are installed
on the operating panel 72. The push-button switches 73-75 are connected to a controller
76.
[0118] In FIG. 11, the numerals, 200, 201, and 202 denote "Dehydration," "Deodorizing,"
and "Filtration," respectively.
[0119] The controller 76 is adapted to control the operation of the air compressor 20 when
the push-button switch 73 for dehydration is pushed ON, control the operation of the
blower 53 when the push-button switch 74 for deodorizing is pushed ON, and further
control the operations of the purified water recycle pump 24 and the grinding water
supply pump 25 when the push-button switch 75 for filtration is pushed ON.
[0120] When the lens grinding apparatus 1 is performing the lens grinding work, the controller
76 controls the operation of the purified water recycle pump 24 so that purified water
is fed to the nozzle 1a in accordance with a work signal provided from the lens grinding
apparatus 1.
[0121] A timer T (see FIG. 4) is mounted to the upper wall 40b of the body case 40 and control
is made so that the time set by the timer T is a filtration time.
<Operation>
[0122] Next, reference will be made below to the operation of the lens grinding apparatus
1 and the grinding water treating apparatus 27 both constructed as above.
Circulating Grinding Water in Grinding Work
[0123] When the grinding work is to be carried out by the lens grinding apparatus 1, first
the open/close operating lever 47b is operated to open the opening/closing valve 47,
allowing the grinding water discharge hose 30 to communicate with the feed port 15,
At the same time, the open/close the open/close operating lever 90b is operated to
open the opening/closing valve 90, allowing the purified water recycle hose 31 to
communicate with the drain ports 16 and 16'. On the other hand, the open/close operating
lever 49b is operated to close the opening/closing valve 49, causing the communication
between the air discharge side of the air compressor 20 and the feed port 16 to be
cut off
[0124] Next, a control panel (not shown) of the lens grinding apparatus 1 is operated to
let the grinding wheel 1b rotate at high speed, thereby grinding the to-be-ground
lens into the glasses lens shape (globe shape). At this time, upon receipt of a grinding
start signal from the lens grinding apparatus 1, the controller 76 causes the purified
water recycle pump 24 and the grinding water supply pump 25 to operate.
[0125] As a result, the purred water present within the purified grinding water chamber
3a in the purified water tank 3 is pumped up by the purified water recycle pump 24
as indicated with arrow A1 in FIG. 9 (see FIG. 10) and is fed through the purified
grinding water supply hose 26 to the nozzle 1a disposed within the lens grinding apparatus
1.
[0126] As shown in FIG. 9, the purified water is sprayed from the nozzle 1a toward the grinding
section A including the grinding wheel 1b of the lens L to cool the grinding section
A and wash away grinding wastes, The purified water after thus washing away of grinding
wastes becomes discharged grinding water and is allowed to flow down together with
the grinding wastes into the discharged grinding water chamber 3b in the grinding
water tank 3 from the bottom of the lens grinding apparatus 1 through the grinding
water discharge hose 19, as indicated with arrow A2 (see FIG. 10).
[0127] On the other hand, the grinding water discharge pump 25 sucks the grinding water
present within the discharged grinding water chamber 3b in the grinding water tank
3 together with grinding wastes and supplies the discharged grinding water containing
the grinding wastes into the grinding wastes separating filter 10 through the grinding
water discharge hose 30, opening/closing valve 47 and feed port 15, as indicated with
arrow A3 (see FIG. 10).
[0128] The discharged grinding water is filtered and separated from grinding wastes by means
of the grinding wastes separating filter 10, then flows down to the bottom side of
the separating vessel body 9. Within the separating vessel body 9, the discharged
grinding water after separation from grinding wastes becomes purified water and is
conducted to the connecting pipe 16b through the drain port 16, drain pipe 16c and
opening/closing valve 60 and also through the drain pore 16', drain pipe 16d, opening/closing
valve 90, drain pipes 16e, 16c and opening/closing valve 50. As shown in FIG. 9, since
the drain ports 16 and 16' are vertically offset from each other, the drainage efficiency
is improved.
[0129] The purified water conducted to the connecting pipe 16b is returned into the discharged
grinding water chamber 3b in the grinding water tank 3 through the purified water
recycle hose 31 as indicated with arrow A4 (see FIG. 10) and is sucked in and recycled
by the purified water recycle pump 24.
[0130] When the grinding wastes separating filter 10 is clogged in the grinding work, with
consequent decrease in the amount of purified water which is returned into the discharged
grinding water chamber 3b in the grinding water tank 3 through the drain port 16 and
the purified water recycle hose 31, the function of washing away grinding wastes and
the function of cooling the grinding section are not affected because the discharged
grinding water present within the discharged grinding water chamber 3b passes through
the partition filter 23, flows into the purified grinding water chamber 3a, then is
discharged from the purified water recycle pump 24 and is recycled.
Deodorizing
[0131] When a slide lid 1c of the lens grinding apparatus 1 is slid upward to open a grinding
chamber 1d of the apparatus 1 and the lens L is removed from between a pair of lens
rotating shafts 1e mounted within the grinding chamber 1d, there is a fear that an
offensive smell developed in the grinding chamber 1d and that in the grinding water
tank 3 may leak from the same chamber and offend the worker. Therefore, when opening
the grinding chamber 1d of the lens grinding apparatus 1, care should be taken to
prevent leakage of the offensive smell from the grinding chamber 1d to the exterior.
[0132] More specifically, first the push-button switch (button) 74 for deodorizing is pushed
ON and this ON signal is inputted to the controller 76. Upon receipt of the ON signal
by the push button switch 74 the controller 76 causes the blower 53 to operate and
a negative suction pressure induced by the blower 53 is exerted on the interior of
the upper space in the purified grinding water chamber 3a through the deodorizing
device body 52, the air hoses 69 and 46a and is also exerted on the grinding chamber
1d through the grinding water discharge hose 19.
[0133] As a result, the offensive smell developed in the grinding chamber 1d is sucked into
the upper space in the purified grinding water chamber 3a through the grinding water
discharge hose 19.
[0134] On the other hand, the air which contains the offensive smell developed in the grinding
chamber 1 and the offensive smell in the upper space of the purified grinding water
chamber 3a is sucked into the deodorizing device body 52 through the air hoses 46a
and 69, then passes through the filter 64 and the activated charcoal 63 and is thereafter
discharged from the blower 53. At this time, foams and grinding wastes developed on
the surface of purified water contained in the air are collected by the filter 64
and the offensive smell contained in the air which has passed through the filter 64
is adsorbed on the activated charcoal 63. Thus, only the air freed from the offensive
smell is discharged to the atmosphere from the blower 53.
[0135] Therefore, the offensive smell developed in the grinding chamber Id of the lens grinding
apparatus 1 does not leak to the exterior and thus there is no fear of the worker
being offended by the offensive smell.
[0136] The state of the interior of the transparent air hose 69 can be visually checked
through the transparent cover 71 applied to the window 70 which is formed in an upper
wall 40d of the body case 40. Therefore, even if the foams formed on the surface of
the purified water in the purred grinding water chamber 3a are sucked into the air
hose 69 together with air, it is possible to check the state of the foams present
within the air hose 69. Consequently, it is possible to easily determine the timing
for the work of taking out the deodorizing device body 52 and replacing the filter
64 and the timing for the work of taking out the air hose 69 and washing the interiox
thereof, whereby it is possible to prevent a bad influence on the deodorization effect
which occurs when the amount of sucked foams is large.
Non-Recycle Filtration of Grinding Water
[0137] When the purified water in the grinding water tank 3 becomes somewhat turbid in the
above grinding work and is to be replaced, the opening/closing valve 47 is opened
by operating the open/close operating lever 47b, allowing tho grinding water discharge
hose 30 to communicate with the feed port 15. At the same time, the opening/closing
valves 50 and 90 are opened by operating the open/close operating levers 45b and 90b,
respectively, allowing the purified water recycle hose 31 to communicate with the
drain ports 16 and 16', On the other hand, the opening/closing valve 49 is closed
by operating the open/close operating lever 49b to cut off the communication between
the air discharge side of the air compressor 20 and the feed port 15,
[0138] Then, the connecting pipe 31a of the purified water recycle hose 31 is removed from
the connecting pipe 16b, the hose hook HF of the connecting pipe 16 is engaged in
the hose hook hole 40c formed in the body case 40, and the grinding water storage
vessel 8 is disposed under the connecting pipe 16b, as shown in FIG. 12.
[0139] When the push-button switch 75 for grinding water filtration is pushed ON from the
state shown in FIG. 11(a) an LED (not shown) disposed within the push button of the
push-button switch 75 goes ON as indicated with a white square in FIG. 11(b and an
ON signal is applied to the controller 76. Upon receipt of the ON signal from the
push-button switch 75 the controller 76 activates the grinding water discharge pump
25.
[0140] The grinding water discharge pump 25 sucks in the discharged grinding water from
the interior of the discharged grinding water chamber 3b in the grinding water tank
3 together with grinding wastes and supplies the discharged grinding water containing
the grinding wastes into the grinding wastes separating filter 10 through the grinding
water discharge hose 30, opening/closing valve 47 and feed port 15 (see arrow A3 in
FIG. 9).
[0141] The discharged grinding water is filtered and separated from the grinding wastes
by the grinding wastes separating filter 10 and flows down to the bottom side of the
separating vessel body 9. The discharged grinding water separated in the separating
vessel 9 becomes purified water and is conducted to the connecting pipe 16b through
the drain port 16, drain pipe 16c and opening/closing valvo 50 and also through the
drain port 16', drain, pipe 16d, opening/closing valve 90, drain pipes 16e, 16c and
opening/closing valve 50. This purified water is then allowed to flow down from the
connecting pipe 16b into the grinding water storage vessel 8 as indicated with arrow
A5 in FIG. 12. In this way the purified water stored in the grinding water storage
vessel 8 is drained to the sewer or the like.
[0142] Such filtration is performed only during the time set by the timer T and upon lapse
of the set time the controller 76 makes control to turn OFF the grinding water discharge
pump 25 and also turn OFF the LED (not shown) installed within the push button of
the push-button switch 75 as in FIG. 11(c).
[0143] In the case where the grinding water storage vessel 8 is not used, a drain hose (not
shown) may be connected to the connecting pipe 16b to drain purified water directly
to the sewer through the said drain hose,
Discarding Grinding Wastes
[0144] When grinding wastes are collected to a certain extent in the grinding wastes separating
filter 10 and the amount of discharged grinding water filtered by the filter 10 decreases,
the grinding water discharge pump 26 is turned OFF.
[0145] Next, the opening/closing valve 47 is closed by operating the open/close operating
lever 47b to cut off communication between the grinding water discharge hose 30 and
the feed port 15. At the same time, the opening/closing valves 50 and 90 are brought
into an open condition to let the purified water recycle hose 31 communicate with
the drain ports 16 and 16'. On the other hand, the opening/closing valve 49 is opened
by operating the open/close operating lever 49b to provide communication between the
air discharge side of the air compressor 20 and the feed port 15.
[0146] At this time, the connecting pipe 81a of the purified water recycle hose 81 may be
removed from the connecting pipe 16b and the grinding water storage vessel 8 may be
disposed under the connecting pipe 16b, or a drain hose (not shown) connected to the
sewer may be connected to the connecting pipe 16b.
[0147] If the air compressor 20 is operated in this state, compressed air discharged from
the air compressor flows into the grinding wastes separating filter 10 through air
hose 21, air regulator 48, opening/closing valve 49 and feed port 15. The compressed
air which has thus entered the grinding wastes separating filter 10 exerts a pressure
on the discharged grinding water contained in the grinding wastes collected in the
filter 10, allowing the discharged grinding water to ooze out downward to produce
purified water, which is flowed down co the bottom side of the separating vessel body
9.
[0148] The purified water after separation in the separating vessel body 9 is conducted
to the connecting pipe 16b through the drain port 16, drain pipe 16c and opening/closing
valve 50 and also through the drain port 16', drain pipe 16d, opening/closing valve
90, drain pipes 16e, 16c and opening/closing valve 60, then is drained from the connecting
pipe 16b in the manner described above.
[0149] This purified water is returned into the purified grinding water chamber 3a through
the purified water recycle hose 31. However, in the case where the connecting pipe
31a of the purified water recycle hose 31 is removed from the connecting pipe 16b
and the grinding water storage vessel 8 is disposed under the connecting pipe 16b,
the purified water flows down from the connecting pipe 16b into the vessel 8. The
purified water stored in the grinding water storage vessel 8 is discarded to the sewer
or the like. Further, where a drain hose (not shown) connected to the sewer is connected
to the connecting pipe 16b, the purified water discharged from the connecting pipe
16b is drained directly to the sewer through the said drain hose.
[0150] After the discharged grinding water contained in the grinding wastes present in the
grinding wastes separating filter 10 has been squeezed out, the lever 14 is operated
to cancel the fixed state of the lid 11 to the separating vessel body 9 with fixing
screws 18.
[0151] Next, the lid 11 is taken off from the separating vessel body 9, then the grinding
wastes separating filter 10 is removed from the interior of the vessel body 9, and
the grinding wastes present in the filter 10 is discarded. Thereafter, the grinding
wastes separating filter 10 is returned to the separating vessel body 9 and the upper
portion of the vessel body 9 is closed with the lid 11 by reversing the above operation,
followed by execution of the foregoing "grinding work" and "grinding water treatment,"
Such a grinding water treatment is repeated.
[0152] The opening/closing valves 47, 48 and 50 described above may be constituted by solenoid
valves so as to be switched over between their open and closed conditions automatically
by the controller 76 at the time of performing the foregoing grinding work, filtration
of the discharged grinding water, deodorization, and dehydration of grinding wastes
by the air pump 20. In FIG. 5, the numeral 80 denotes a remote controller provided
with the same push-button switches as the push-button switches (buttons) 73, 74 and
75 provided on the operating panel 72.
[0153] Although in this modification there are provided opening/closing valves 47 and 49,
this construction does not always constitute a limitation. For example, there may
be adopted a construction wherein the opening/closing valves 47 and 49 are omitted
and a three-way change-over valve is disposed in a connection 15b (a branch portion
from pipe 15a) between a pipe 16a connected to the feed port 15 and pipes 44a, 45a
connected to the connecting pipes 44, 45, to cut off communication between the pipes
15a and 45a when the pipes 16a and 44a communicate with each other and cut off communication
between the pipes 15a and 44a when the pipes 15a and 45a communicate with each other.
[0154] If this three-way change-over valve is constituted by an electromagnotic three-way
change-over valve, its switching operation can be done automatically, whereby the
operability thereof is improved. This is also the case with the other opening/closing
valves described above.
[0155] Although the connecting pipe 16b and the purified water recycle hose 31 are coupled
and uncoupled to return the grinding water after the grinding water treatment into
the purified grinding water chamber 3a, allow it to flow down into the grinding water
storage vessel 8, or drain it to the sewer, there is not always made limitation to
this construction. For example, a three-way change-over valve may be provided in the
connecting pipe 16b to switch over between communication of the pipe 16b with the
purified water recycle hose 31 and a pipe to the sewer and blocking of the communication.
[0156] Likewise, a three-way change-over valve may be provided in the connecting pipe 16b
to switch over between communication of the pipe 16b with the purified water recycle
hose 31 and a pipe to the grinding water storage vessel 8 side and blocking of the
communication.
[0157] Also as to these three way change-over valves, each may be constituted by an electromagnetic
three way valve, whereby their switching operations can be done automatically. Further,
for attaining a higher efficiency there may be provided a multi-way change-over valve
or an electromagnetic change-over valve which makes communication between the connecting
pipe 16b and one of the purified water recycle hose, 31, a pipe to the sever and a
pipe to the grinding water storage vessel 8 side.
[0158] As described above, the grinding water treating apparatus (27) according to this
modification is provided with the grinding water treating means (grinding water treating
section 27a) which filters grinding water (discharged grinding water) after used in
the glasses lens grinding work to separate grinding wastes and produce purified water
and the deodorizing means (deodorizing device 51) for removing an offensive smell
developed in the grinding water treating means (27a) and an offensive smell in the
grinding water storage vessel (grinding water tank 3), the grinding water treating
means (27a) and the deodorizing means (51) being disposed within tho same housing
(body case 40).
[0159] According to this construction, the grinding water treating apparatus (27) having
the grinding water treating means (27a) and the deodorizing means (52) can be accommodated
in a limited receptacle space and thus it is possible to attain the reduction of the
receptacle space.
[0160] In the grinding water treating apparatus (27) according to this modification, the
grinding water treating means (27a) has a one-pass treating means (the grinding wastes
separating filter 10) which causes grinding water to pass once therethrough to filter
off grinding wastes. filtration does not return to the grinding water storage vessel
(grinding water chamber 3a), but filtered water high in clarity can be drained directly
to the sewer
[0161] Further, in the grindmg water treating apparatus (27) according to this modification,
the one-pass treating means (10) has the pressurizing means (air compressor 20) which
applies a predetermined pressure to the grinding water treating means (27a) to squeeze
out and filter grinding water from grinding wastes in the grinding water treating
means, thereby permitting the grinding wastes to be treated at a time.
[0162] According to this construction, even if the one-pass treating means (10) is clogged,
the grinding water present within the one-pass treating means (10) can bo separated
from grinding wastes quickly, easily and positively and thus it is possible to facilitate
the discard of only the grinding wastes.
[Third Embodiment]
[0163] A third embodiment of the present invention will be described below. As to the same
constructions and functions as in the first and second embodiments, explanations thereof
will be omitted.
<Construction>
[0164] In this third embodiment, as shown in FIGS. 13 to 17, a tip of a purified water recycle
hose 31, whose opposite end is connected to a drain port 16 through a connecting pipe,
is held above a discharged grinding water chamber 3b in a grinding water tank 3 removably
with use of a connector or a screw.
[0165] As shown in FIG. 17, an injection nozzle N as injection means which radially injects
purified water flowing out from the drain port 16, using a known means, is attached
to the tip of the purified water recycle hose 31.
[0166] The tip of the purified water recycle hose 31 is positioned near a discharge port
19a of a grinding water discharge hose 19. In this case, the closer to the discharge
port 19a of the grinding water discharge hose 19 the tip of the purified water recycle
hose 31 is, the better.
<Operation>
[0167] In the grinding water treating apparatus 27 of such a construction, purified water
resulting from separation of grinding wastes by a grinding wastes separating filter
10 is returned into the discharged grinding water chamber 3b in the grinding water
tank 3 through the purified water recycle hose 31.
[0168] At this time, this purified water is injected into the discharged grinding water
chamber 3b through the injection nozzle N which is positioned above the chamber 3b.
[0169] Since the tip of the purified water recycle hose 31 with the injection nozzle N attached
thereto is positioned near the discharge port 19a of the grinding water discharge
hose 19, the water injected from the nozzle N blends with discharged grinding water
flowing down from the grinding water discharge hose 19 after use in the grinding work
and at the same time can cover the portion where the discharged grinding water which
is flowing down and the discharged grinding water which has already been stored in
the chamber 3b strike against each other.
[0170] Thus, before grinding wastes contained in the discharged grinding water adhere fixedly
to foams which are produced when the discharged grinding water flows out from the
grinding water discharge hose 19 down into the grinding water tank 3, it is possible
to inject (spray) purified water toward the inflow position of the discharged grinding
water so that the discharged grinding water as inflow water and purified water after
filtration blend each other, thus permitting extinction of the foams.
[0171] Moreover, since the injection nozzle N attached to the opposite end of the purified
water recycle hose 31 can inject purified water radially, it is possible to inject
(spray) the purified water so as to cover substantially the whole surface of the discharged
grinding water stored in the grinding water tank 3.
[0172] Further, before the grinding wastes contained in the discharged grinding water adhere
fixedly to the peripheries of foams which are produced when the discharged grinding
water flows out from the grinding water discharge hose 19 down into the grinding water
tank 3, it is possible to inject purified water radially and thereby extinguish the
foams.
[0173] A divergence angle θ (see FIG. 17) of purified water injected by the injection nozzle
N is in the range of 120° to 180°. The divergence angle θ can be adjusted to an arbitrary
angle.
[0174] As to the position of the tip of the purified water recycle hose 31 with the injection
nozzle N attached thereto, the closer to the discharge port of the grinding water
discharge hose 9, the better, because the injected purified water becomes easier to
blend with the discharged grinding water flowing down from the grinding water discharge
hose 19 and hence it becomes easier to extinguish foams.
[0175] The discharged grinding water chamber 3b to which purified water is returned and
the purified grinding water chamber 3a adjacent thereto are in communication with
each other through a partition filter 23. Therefore, the grinding water (purified
water) after separation from grinding wastes by the partition filter 23 flows into
the purified grinding water chamber 3a and is sucked in and circulated by means of
a purified water recycle pump 24.
<Evaluation Result>
[0176] The results of having evaluated the grinding water treating apparatus of the third
embodiment will be shown below.
[0177] Evaluation items are the height of foam layer, i.e., the height of foams (cm), from
the surface of grinding water relative to the time elapsed after filtration.
[0178] The evaluation was made in the following manner. Thirty plastic lenses (CR-39) apt
to produce a lot of foams were subjected to grinding continuously under constant filtration.
The height of foams was measured at every ten lenses, and after grinding the thirty
lenses, only filtration was conducted for 10 minutes continuously and the height of
foams was measured in the same way,
[0179] The results of this evaluation are as shown in the following Table 1.
100 |
101 |
|
102 |
103 |
104 |
106 |
0 |
0 |
0 |
106 |
0.5 |
2 |
10 |
107 |
2 |
3.5 |
15 |
108 |
3.5 |
8 |
15 |
109 |
3.5 |
8 |
15 |
110 |
1.5 |
8 |
15 |
111 |
1 |
8 |
15 |
[0180] In Table 1, the numeral 100 stands for "Item," numeral 101 stands for "foam height
(cm)," numeral 102 stands for "with injection nozzle," numeral 103 stands for "without
injection nozzle," numeral 104 stands for "without filter," numeral 105 stands for
"0 lens," numeral 106 stands for "10 lenses," numeral 107 stands for "20 lenses,"
numeral 108 stands for "30 lenses," numeral 109 stands for "0 minute after filtration,"
numeral 110 stands for "1 minute after filtration," and numeral 111 stands for "3
minutes after filtration."
[0181] The results are graphed as in FIG. 18.
[0182] In FIG. 18, numeral 112 stands for "change in foam height for each number of lens,"
numeral 118 stands for "foam height (cm)," numeral 114 stands for "number of lens
under filtration," numeral 116 stands for "time of only filtration continued," numeral
116 stands for "with nozzle," numeral 117 stands for "without nozzle," numeral 118
stands for "FS not used," numeral 119 stands for "0 lens," numeral 120 stands for
"10 lenses," numeral 121 stands for "20 lenses," numeral 122 stands for "30 lenses."
numeral 128 stands for "0 minute," numeral 124 stands for "1 minute," numeral 125
stands for "3 minutes," numeral 126 stands for "5 minutes," numeral 127 stands for
"7 minutes," and numeral 128 stands for "10 minutes."
[0183] From the above results it turned out that the formation of foams could be decreased
66% by attaching the injection nozzle N to the tip of the purified water recycle hose
31 to let purified water blend with discharged grinding water. It also turned out
that most of produced foams could be extinguished by continuing filtration about 10
minutes after the grinding work.
[0184] In the grinding water treating apparatus 27 of this third embodiment, as described
above, in addition to the components of the grinding water treating apparatus 7, 27
of the first and second embodiments, the grinding water treating means 27a is provided
with the purified water recycle hose 31 for returning purified water to the grinding
water storage vessel 3, and the injection means (injection nozzle N) for injecting
purified water to blend it with grinding water flowing into the grinding water storage
vessel (grinding water tank 3) is attached to the tip of the purified water recycle
hose 31, thereby extinguishing foams produced on the surface of the grinding water
stored in the vessel 3.
[0185] According to this construction, before grinding wastes contained in grinding water
adhere fixedly to foams which are produced when the grinding water flows into the
grinding water storage vessel 3, purified water is injected toward the grinding water
influent position so that the influent grinding water and the purified water after
filtration blend with each other, whereby the foams can be extinguished.
[0186] Moreover, in the grinding water treating apparatus 27 of this third embodiment, the
grinding water treating means 27a is provided with the purified water recycle hose
31 for returning purified water to the grinding water storage vessel 9, and the injection
means (injection nozzle) is attached to the tip of the purified water recycle hose
31 which injection means injects purified water radially to cover the surface of the
grinding water already stored within the grinding water storage vessel 3, thereby
extinguishing the foams formed on the surface of the grinding water stored in the
vessel 3.
[0187] According to this construction, before grinding wastes contained in grinding water
adhere fixedly to foams which are produced when grinding water flows into the grinding
water storage vessel 3, purified water is injected radially so as to cover the influent
grinding water by the purified water after filtration, whereby the foams can be extinguished,
[0188] Further, in the grinding water treating apparatus 27 of this third embodiment, the
portion where the grinding water flowing into the grinding water storage vessel 3
strikes against the grinding water already stored in the grinding water storage vessel
3 is covered with purified water injected from the purified water recycle hose 31,
[0189] According to this construction, foams produced on the surface of the grinding water
already stored in the grinding water storage vessel 8 can be extinguished effectively.
[Fourth Embodiment]
[0190] As a fourth embodiment of the present invention, reference will be made below to
a lens grinding apparatus 1' a principal portion of which is shown in FIG. 19.
[0191] The lens grinding apparatus 1' is provided with a grinding apparatus body (not shown),
a grinding water tank (grinding water storage vessel) 3 which stores discharged grinding
water after use in a glass lens grinding work in the grinding apparatus body, and
a grinding water supply hose (grinding water discharge hose) 19 for admitting the
discharged grinding water into the grinding water tank 3.
[0192] An injection nozzle N as injection means is attached to a tip 19a of the grinding
water discharge hose 19 to inject the discharged grinding water radially.
[0193] The surface of discharged grinding water pre 'stored in a discharged grinding water
chamber 3b of the grinding water tank 3 can be covered with the discharged grinding
water which is injected through the injection nozzle N, and thus foams produced on
the surface of the discharged grinding water can be extinguished.
[0194] As in the first embodiment, a divergence angle θ of the discharged grinding water
injected by the injection nozzle N is in the range of 120° to 180°. The divergence
angle θ can be adjusted to an arbitrary value.
[0195] As described above, the lens grinding apparatus 1' of this fourth embodiment is provided
with the grinding water storage vessel (grinding water tank 3) for the storage of
grinding water (discharged grinding water) after use in the glasses lens grinding
work and the grinding water supply hose (grinding water discharge hose 19) for admitting
grinding water into the grinding water storage vessel 3, further, the injection means
(injection nozzle N) is attached to the tip 19a of the grinding water supply hose
19 to inject grinding water radially, thereby covering the surface of the grinding
water already stored in the grinding water storage vessel 3 and extinguishing foams
produced on the surface of the grinding water.
[0196] According to this construction, before grinding wastes contained in grinding water
adhere fixedly to foams which arc produced during inflow of grinding water into the
grinding water storage vessel 3, grinding water is injected radially so as to cover
the grinding water already stored in the veaael 3, whereby the foams can be extinguished,