BACKGROUND OF THE INVENTION
[0001] The present invention relates to a press roller apparatus for a weaving machine which,
when carrying out a warp winding operation (a woven fabric winding operation) or the
like, is used to separate two or more press rollers from a surface roller at the same
time.
[0002] JP-A-10-110356 (Japanese Patent Application Publication Number: Hei10-110356) discloses
a winding press roller apparatus for a weaving machine. According to this winding
press roller apparatus for a weaving machine, two or more press rollers are pressure
contacted with a surface roller. Using this winding press roller apparatus, an operator
carries out a warp winding operation (a woven fabric winding operation) , that is,
connects the warp to a woven fabric on the winding roller side, inserts the woven
fabric through a winding passage and guides the sheet-shaped warp, in order to insert
the woven fabric through the winding passage; and, in this operation, the operator
operates an operation lever for each of the press rollers to thereby separate the
respective press rollers from the surface roller.
[0003] However, in the case of the above-cited technology, to separate all of the press
rollers, the operation lever must be operated for each of the press rollers, which
takes time and labor to separate all the press rollers.
SUMMARY OF THE INVENTION
[0004] Accordingly, it is an object of the invention to be able to separate two or more
press rollers from a surface roller simultaneously with simple means and in a short
time.
[0005] In attaining the above obj ect, according to the invention, there is provided a press
roller apparatus (2), for a weaving machine', comprising: a surface roller (4); two
or more press rollers (6) disposed contactably with and separatably from the surface
roller (4); and a transmission member (7) disposed between one press roller (6) and
the other press roller (6), and transmitting the separating movement of one press
roller (6) from the surface roller (4) to the other press roller (6) for separating
the other press roller (6) from the surface roller (4).
[0006] The respective press rollers (6) are swingably mounted on a frame (13) by two or
more press levers (10, 11), and the transmission member (7) is composed of elements
(8 · 9, 25 · 26, 33 · 34) engageable with each other to thereby transmit the swinging
movement of one press roller (6) as the swinging movement of the other press roller
(6) through their mutual engagement. The transmission member (7), preferably, may
be composed of an engaging portion and a portion to be engaged which can be rotated
about their respective rotary shafts. And, in the engaging portion and the portion
to be engaged, preferably, there may be formed one or more securing portions separated
from the rotary shafts in the radial direction of the rotary shafts and extending
in the radial direction of the rotary shafts, thereby being able to maintain the engagement
between the respective securing portions of the engaging portion and the portion to
be engaged during the separating operation of one press roller (6) from the surface
roller (4).
[0007] Of the two or more press levers (10, 11), any one of the press bars (10, 11) can
be swung by operating a lift-up lever (17). Also, on one of the press levers (10,
11) and the frame (13), there is rotatably mounted the lift-up lever (17) and, by
rotating the lift-up lever (17).while it is in part contacted with the other, the
respective press rollers (6) can be separated from the surface roller (4).
[0008] The lift-up lever (17) includes: a lift-up bar (17a) rotatably supported on the press
lever (10) ; and a roller (19) rotatably mounted on the lift-up bar (17a) and a fixed
wall (20) fixed to the frame (13) is fixed at a position where it can be contacted
with the roller (19). Or, the lift-up lever (17) includes: a lift-up bar (17a) rotatably
supported on the frame (13) by an eccentric pin (23); and a cam (22) mounted so as
to be rotatable integrally with the lift-up bar (17a); and the press lever (10) includes
a lift-up lever receive portion (24) fixed to the press lever (10) at a position contactable
with the cam (22). Or, the lift-up lever (17) may be composed of a lift-up bar (17a)
rotatably supported on the rotary shaft (14) ofthepressbar (10), and the transmission
member (7) is composed of elements (25 · 26, 33 · 34) which are mounted on the rotary
shaft (14, 15) of the press levers (10, 11) and can be engaged with each other.
BRIEF DESCRIPTION OF THE DRAWING
[0009]
Fig. 1 is a side view of the main portions of a first embodiment of a press roller
apparatus for a weaving machine according to the invention;
Fig. 2 is a plan view of the main portions of the first embodiment of a press roller
apparatus for a weaving machine according to the invention;
Fig. 3 is a perspective view of part of a press lever portion of a second embodiment
of a press roller apparatus for a weaving machine according to the invention;
Fig. 4 a side view of the main portions of a third embodiment of a press roller apparatus
for a weaving machine according to the invention;
Fig. 5 is a plan view of part of part of the third embodiment of a press roller apparatus
for a weaving machine according to the invention;
Fig. 6 is a side view of the main portions of a fourth embodiment of a press roller
apparatus for a weaving machine according to the invention;
Fig. 7 is a side view of the main portions of a fifth embodiment of a press roller
apparatus for a weaving machine according to the invention; and,
Fig. 8 is a side view of the main portions of a sixth embodiment of a press roller
apparatus for a weaving machine according to the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
(First Embodiment)
[0010] Fig. 1 and Fig. 2 show a winding apparatus 1 for a weaving machine and a press roller
apparatus 2 for a weaving machine according to the invention which is incorporated
into the winding apparatus 1 for a weaving machine. In these figures 1 and 2, the
winding apparatus 1 for a weaving machine, at the winding position of a woven fabric
12 which has been woven,' includes two expansion rollers 3 having a larger width than
the weaving width and parallel to each other, a surface roller 4, a winding roller
5, and two or more press rollers 6 (a first press roller 6a and a second press roller
6b) disposed so as to be contactable with and separatable from the surface roller
4 . The woven cloth 12 is wound sequentially around the expansion rollers 3, surface
roller 4, first press roller 6a and second press roller 6b, and is finally wound around
the outer periphery of the winding roller 5.
[0011] And, in order to be able to separate the first press roller 6a and second press roller
6b serving as the two or more press rollers 6 disposed so as to be contactable with
and separatable from the surface roller 4 from the surface roller 4, the press roller
apparatus 2 for a weaving machine according to the invention includes two projection
portions 8 and 9 serving as a transmission member 7 which is used to transmit the
movement of the first press roller 6a to the second press roller 6b. These projection
portions 8 and 9 are formed respectively in the boss portions of a first press lever
10 and a second press lever 11 which respectively support the first and second press
rollers 6a, 6b rotatably. By the way, in the case of the structure shown in Figs.
1 and 2, the boss portions of the first and second press levers 10 and 11 are respectively
an engaging portion and a portion to be engaged, while the projection portions 8 and
9 are respectively single securing portions which are respectively formed in the engaging
portion and the portion to be engaged.
[0012] The expansion roller 3, surface roller 4 and winding roller 5 are rotatably supported
on a pair of right and left frames 13 of the winding apparatus 1 for a weaving machine.
Also, the first and second press rollers 6a and 6b are rotatably mounted respectively
on a pair of right and left press levers 10 and a pair of right and left press levers
11; and, they are rotatably supported on the frames 13 through fixed shafts 14, 15
and are energized toward the surface roller 4 by a tension spring 16 to thereby press
the woven fabric 12 against the surface roller 4.
[0013] On the pair of right and left first press levers 10, there are rotatably mounted
their respective lift-up levers 17 by pins 21. Each of the lift-up levers 17 is composed
of a lift-up bar 17a, a grip portion 18 and a roller 19. In other words, the lift-up
lever 17 is disposed axially with the rotary shaft of the first press roller 6a and,
on the end portion of the lift-up lever 17 that extends on the opposite side with
respect to the grip portion 18, there is disposed the roller 19 as part of the lift-up
lever 17; and, as the lift-up bar 17a is rotated counterclockwise in Fig. 1, the roller
19 is allowed to rotate and move along the upper surface of a fixed wall 20 fixed
to the frame 13. By the way, the pair of right and left lift-up bars 17a can be connected
together by a connecting member 17b as the need arises and can be both rotated at
the same angle.
[0014] The right-side upper surface of the fixed wall 20 in Fig. 1 is situated inside the
rotation locus of the.roller 19 about the pin 21. Therefore, as the lift-up bar 17a
is rotated counterclockwise, the pair of right and left first press levers 10 are
lifted up and rotated counterclockwise, so that they are rotated in a direction to
separate the first press roller 6a from the surface roller 4.
[0015] Also, in the boss portion of the first press roller 6a and in the boss portion of
the second press roller 6b, there are respectively formed the projection portions
8 and 9 as the transmission member 7 in such a manner that the projection portions
8 and 9 can be engaged with each other. Thanks to this, the movements (rotational
movements) of the pair of right and left first press levers 10 can be transmitted
to the pair of right and left second press levers 11 through the engagement between
the projection portions 8 and 9.
[0016] In Fig. 1 and Fig. 2, in case where two operators or one operator rotates the pair
of lift-up bars 17a counterclockwise in Fig. 1 simultaneously, firstly, the respective
rollers 19 are contacted with their corresponding fixed walls 20 and are further moved
along the upper surfaces of the fixed walls 20. With these movements of the rollers
19, the first press lever 10 and the first press roller 6a formed integral with this
lever 10 are rotated counterclockwise about the fixed shaft 14 against the tensile
force of the tension spring 16, so that the first press roller 6a is separated from
the surface roller 4. By the way, the operation force at this time is set.small according
to the principles of the lever.
[0017] In Fig. 1, when the roller 19 moves beyond the.vertical line of the pin 21 and further
to the right side thereof and is thereby contacted with a stopper portion 20a formed
integral with the fixed wall 20, the pair of right and left lift-up bars 17a are locked
between the fixed wall 20 and stopper portion 20a. Due to this, even in case where
the operator releases his or her hand from the lift-up bar 17a, the rotational movement
of the first press roller 6a about the fixed shaft 14 against the tensile force of
the tension spring 16 is maintained, so that the first press roller 6a remains separated
from the surface roller 4.
[0018] Also, with the rotational movement of the first press lever 10 in the counterclockwise
direction, the projection portion 8 formed integral with the first press lever 10
is engaged with the projection portion 9 to thereby rotate the second press lever
11 clockwise. The second press lever 11, while it is rotated clockwise about the rotary
shaft 15, separates the second press roller 6b from the surface roller 4 at the same
time as the first press roller 6a. In this manner, due to the cooperative relation
between the projection portions 8 and 9 caused by the operation of the lift-up bar
17a, the first and second press rollers 6a and 6b are rotated about the rotary shaft
15 and are thereby separated from the surface roller 4.
[0019] In this manner, when carrying out the woven fabric winding operation, the two press
rollers 6 (the first and second press rollers 6a and 6b) are separated from the surface
roller 4 due to the operation of the pair of lift-up bars 17a, so that the woven fabric
12 can be inserted into the winding passage easily. Also, according to the principles
of the lever based on the position of the contact point between the roller 19 and
fixed wall 20, the position (fulcrum) of the pin 21 and the ratio (fulcrum) of the
operation position with respect to the lift-up bars 17a, the operator is able to operate
the lift-up bars 17a with a small force. By the way, in case where the two tension
springs 16 are previously removed as the need arises in the above separation executing
time, the operator can operate the lift-up bars 17a with a further smaller force.
[0020] When returning the press rollers 6 (first and second press rollers 6a and 6b) after
completion of the woven fabric winding operation, the lift-up bars 17a may be rotated
in the opposite direction. Due to this return operation, the press rollers 6 (first
and second press rollers 6a and 6b) are returned to their respective original positions
at the same time and are contacted with the woven fabric 12 in the winding passage
to thereby press the woven fabric 12 against the surface roller 4.
[0021] As described above, in case where the pair of right and left lift-up bars 17a are
connected together by the connecting member 17b and thus can be both rotated at the
same angle, there can be obtained an advantage that the pair of right and left lift-up
bars 17a can be rotationally operated by a single operator. By the way, in this embodiment,
the lift-up bars 17a are disposed respectively on the two ends of the first press
roller 6a; however, in case where the right and left first press levers 10 can be
cooperatively operated, the lift-up bar 17a may be disposed on only one of the two
ends. Further, the lift-up lever 17 (lift-up bars 17a) may also be rotated using an
actuator such as an air cylinder instead of manpower. The above structure can be applied
also to all of the following embodiments as much as possible.
(Second Embodiment)
[0022] Fig. 3 shows a second embodiment in which the projection portion 8 of the transmission
member 7 is not disposed in the first press lever 10 but is disposed in the rotary
shaft 14 which is formed integral with the first press lever 10. By the way, in correspondence
to this, the projection portion 9 is not disposed in the second press lever 11 either,
but can be disposed in a rotary shaft 15 formed integral with the second press lever
11. As in this embodiment, not only the projection portions 8 and 9 may be disposed
in the rotary shafts 14 and 15 as the transmission member 7 but also gears or the
like may be mounted on both of the rotary shafts 14, 15 to thereby transmit the swinging
movement of the first press roller 6a to the second press roller 6b.
(Third Embodiment)
[0023] Fig. 4 and Fig. 5 show a third embodiment in which the first press lever 10 is operated
using a cam mechanism. In the embodiment shown in Figs. 1 and 2, the lift-up lever
17 is mounted on the first press lever 10. On the other hand, in the present embodiment,
the lift-up lever 17 is rotatably mounted on the frame 13 by the eccentric pin 23
of a cam 22 and, in the first press lever 10, there is formed a lift-up bar receive
portion 24 which can be contacted with the cam 22 having an elliptic shape. In this
manner, the eccentric pin 23 is always held in its regular position and, in this position,
the outer peripheral surface of the cam 22 is contacted with the lift-up bar receive
portion 24.
[0024] When the lift-up bar 17a is rotated counterclockwise in Fig. 4, the cam 22 is rotated
about the eccentric pin 23 and thus, at a large lift position (an outer peripheral
surface position greatly distant from the eccentric pin 23), lifts up the lift-up
lever receive portion 24 and the first press lever 10 formed integral therewith to
thereby separate the first press roller 6a from the surface roller 4. At the then
time, similarly to the above-mentioned embodiment, the first press lever 10, during
its rotation process, rotates the second press lever 11 clockwise through the engagement
between pawl-shaped projection portions 8 and 9 to thereby separate the second press
roller 6b from the surface roller 4. By the way, the cam 22 can also be replaced with
a lever and a roller disposed on the leading end thereof. In the embodiments shown
in Figs. 3 and 4 as well, similarly to the embodiment shown in Figs. 1 and 2, the
respective boss portions of the first and second press levers 10 and 11 are used as
their respective engaging portion and portion to be engaged; and, the projection portions
8 and 9 are respectively single securing portions which are formed in their associated
engagingportion and portion to be engaged.
(Fourth Embodiment)
[0025] Fig. 6 shows a fourth embodiment in which means for engaging the transmission member
7 is composed of a pair of gears 25 and 26 which can be engaged with each other. The
lift-up lever 17 (lift-up bar 17a), first press lever 10 and gear 25 can be rotated
integrally with each other about the rotary shaft 14. Also, the gear 26 is meshingly
engaged with the gear 25 and can be rotated about the rotary shaft 15 integrally with
the second press lever 11. In the case of the example shown in Fig. 6, the gears 25
and 26 are used as an engaging portion and a portion to be engaged; and, gear teeth
formed in the respective gears 25 and 26 provide two or more securing portions.
[0026] In case where the lift-up bar 17a is rotated counterclockwise in Fig. 6, the first
press lever 10 and first press roller 6a are separated from the surface roller 4 and,
in linking.with this, due to the meshing engagement between. the gears 25 and 26,
the second press lever 11 and second press roller 6b are also separated from the surface
roller 4. By the way, the gear 25 and first press lever 10 as well as the gear 26
and second press lever 11 may not be formed as separate parts, but the associated
sets of gears and press levers may be formed as integral parts. In case where the
press rollers 6a and 6b are fixed in a state where they are separated from the surface
roller 4, for example, there may be formed penetration holes in the first press lever
10 and second press lever 11; also, in the portions of the frame 13 that correspond
to the penetration holes formed in the first and second press levers 10 and 11 in
a state where the press rollers 6a and 6b are separated from the surface roller 4,
there are also formed penetration holes; and, single securing pins may be penetrated
through the above two penetration holes to thereby fix the press rollers 6a and 6b.
(Fifth Embodiment)
[0027] Fig. 7 shows a fifth embodiment in which, in the embodiment shown in Fig. 1, in order
to hold the winding roller 5, there is additionally disposed a third press roller
27, this third press roller 27 is supported by a third press lever 29, and, through
the cooperative operation between a projection portion 30 serving as the transmission
member 7 of the second press lever 11 and a projection portion 31 serving as the transmission
member 7 of the third press lever 29, the third press lever 29 is shifted in the separating
direction. By the way, the third press lever 29 is rotatably supported in its regular
position by a rotary shaft 28 fixed to the frame 13.
[0028] As in the description with reference to Fig. 1, while the first and second press
rollers 6a and 6b are separated from the surface roller 4 through the operation of
the lift-up bar 17a, since the movement of the second press lever 11 at the then time
is transmitted to the third press lever 29 due to the cooperative operation relation
between the projection portion 30 and projection portion 31 respectively serving as
the transmissionmembers 7, the third press roller 27 is separated from the winding
roller 5 at the same time as the first and second press roller 6a and 6b and third
press lever 29. By the way, as the woven fabric 12 is wound around the winding roller
5, the projection portions 30 and 31 are separated from each other and are thereby
out of meshing engagement with each other; however, since these projection portions
30 and 31 are used when.carrying out the woven fabric. winding operation, that is,
they are used in the early stage for winding the woven fabric 12 around the winding
roller 5, there is cased no problem.
(Sixth Embodiment)
[0029] Fig. 8 shows a sixth embodiment in which, in the embodiment shown in the above-discussed
figure 6, instead of the gears 25 and 26 serving as the transmission members 7, there
are used projection-shaped and recess-shaped parts to be meshingly engageable with
each other, that is, a projection-shaped part 33 and a recess-shaped part 34 to be
engaged with the projection-shaped part 33. The proj ection-shaped part 33 can be
rotated about the rotary shaft 14 integrally with the first press lever 10 and lift-up
lever 17, whereas the recess-shaped part 34 can be rotated about the rotary shaft
15 integrally with the second press lever 11. The projection-shaped part 33 and recess-shaped
part 34 are engaged with each other and, in case where the lift-up bar 17a is rotated
counterclockwise, the first press lever 10 and first press roller 6a are respectively
separated from the surface roller 4 and, in linking with this, the second press lever
11 and second press roller 6b are also separated from the surface roller 4.
[0030] In the case of the embodiment shown in Fig. 8, the projection-shaped part 33 and
recess-shaped part 34 respectively serve as an engaging portion and a portion to be
engaged, while a projection portion formed in the projection-shaped part 33 and a
recess portion formed in the recess-shaped part 34 serve as securing portions respectively.
By the way, the gears 25 and 26 shown in Fig. 6 as well as the projection-shaped part
33 and recess-shaped part 34 shown in Fig. 8 respectively serving as the transmission
members 7 can also be applied to the embodiments respectively shown in Figs. 1, 4
and 7. Also, in the case of the embodiment shown in Fig. 8, similarly to the embodiment
shown in Fig. 6, in the first press lever 10, secondpress lever 11 and frame 13, theremaybe
formedpenetration holes respectively and, by penetrating single securing pins through
these penetration holes, the press rollers 6a and 6b may be fixed in a state where
they are separated from the surface roller 4.
[0031] In the aforementioned embodiments of the present invention, in a press roller apparatus
for a weaving machine including two or more press rollers disposed so as to be connectable
with and separatable from a surface roller, since the press roller apparatus includes
a transmission member for transmitting the movement of any one of the press rollers
to the other press roller and the other press roller is separated from the surface
roller in linking with the separating operation of the above-mentioned any one press
roll.er, in case where any one of the press rollers is separated from the surface
roller, the other press roller connected with the present press roller through the
transmission member can be separated simultaneously with the present press roller.
Thanks to this, two or more press rollers can be separated from the surface roller
by an easy method and in a short time, thereby being able to enhance the operation
efficiency of the present press roller apparatus.
[0032] In the aforementioned embodiments of the present invention, the two or more press
rollers are disposed so as to be swingable and the transmission member, in linking
with the swinging movement of the above-mentioned any one press roller, swings the
other press roller. Therefore, two or more press rollers can be separated from the
surface roller using a simple mechanism.
[0033] In the aforementioned embodiments of the present invention, any one of the press
rollers is swung by operating a lift-up lever and the other press roller is swung
in linking with the swinging movement of the above-mentioned any one press roller.
Also, according to Claim 4, by rotating the lift-up lever while part of the lift-up
lever is contacted with a press lever or a frame, the operator can separate the press
roller from the surface roller simply by operating the lift-up lever.
[0034] In the aforementioned embodiments of the present invention, the lift-up lever is
composed of a lift-up bar supported so as to be rotatable with respect to the press
lever, a roller rotatably.mounted on the lift-up bar, and a fixed wall is fixed to
the frame (13) at a position where it can be contacted with this roller. Thanks to
this, the operation force of the lift-up bar can be reduced and the lift-up bar at
its lift-up position can be stabilized.
[0035] In the aforementioned embodiments of the present invention, since a cam mechanism
is used, by selecting the shape of a cam, the quantity of separation of the press
roller can be set freely.
[0036] In the aforementioned embodiments of the present invention, because the transmission
member is mounted on the rotary shaft of the press lever and is composed of elements
which can be engaged with each other, the range of the rotation angle of the lift-up
lever can be set arbitrarily.
1. A press roller apparatus (2), for a weaving machine, comprising:
a surface roller (4);
two or more press rollers (6) disposed contactably with and separatably from the surface
roller (4); and
a transmission member (7) disposed between one press roller (6) and the other press
roller (6), and transmitting the separating movement of one press roller (6) from
the surface roller (4) to the other press roller (6) for separating the other press
roller (6) from the surface roller (4).
2. The press roller apparatus (2) according to claim 1,
further comprising two or more press levers (10, 11) supporting the respective
press rollers (6) swingably to a frame (13), and
wherein the transmission member (7) includes: elements (8 · 9, 25. · 2 6, 33 ·
34) engageable with each other, and transmiting the swinging movement of one press
roller (6) to the other press roller (6) as the swinging movement of the other press
roller (6) through their mutual engagement.
3. The press roller apparatus (2) according to claim 2,
wherein any one of the press levers (10, 11) can be swung by operating a lift-up
lever (17).
4. The press roller apparatus (2) according to claim 2 or 3, further comprising a lift-up
lever (17) mounted rotatably on one of the press levers (10, 11) and the frame (13);
and
wherein the respective press rollers (6) are separated from the surface roller
(4) when the lift-up lever (17) is rotated while contacting in part with the other
of the press levers (10, 11) and the frame (13).
5. The press roller apparatus (2) according to claim 4, further comprising a fixed wall
(20) fixed to the frame (13); and
wherein the lift-up lever (17) includes:
a lift-up bar (17a) supported rotatably on the press lever (10); and
a roller (19) mounted rotatably on the lift-up bar (17a), the fixed wall (20) is fixed
at a position where it can.be contacted with the roller (19).
6. The press roller apparatus (2) according to claim 4 or 5, wherein the lift-up lever
(17) includes:
a lift-up bar (17a) supported rotatably on the frame (13) by an eccentric pin (23);
and
a cam (22) mounted so as to be rotatable integrally with the lift-up bar (17a); and
wherein the press lever (10) includes a lift-up lever receive portion (24) fixed to
the press lever (10) at a position contactable with the cam (22).
7. The press roller apparatus (2) according to claim 3,4, 5 or 6, wherein the lift-up
lever (17) includes a lift-up bar (17a) supported rotatably on the rotary shaft (14)
of the press lever (10); and
wherein the transmission member (7) includes elements (25 · 26, 33 · 34) mounted
on the rotary shaft (14, 15) of the press levers (10, 11), and the elements (25 ·
26, 33 · 34) is engageable with each other.
8. The press roller apparatus (2) according to one of the preceding claims, further comprising
a press roller for winding roller (27) disposed contactably with and separatably from
a winding roller (5) ; and
wherein the movement transmitted from one press roller (6) to the other press roller
(6) is further transmitted to the press roller for winding roller (27) by the transmission
member (7); and
wherein when one press roller (6) is separated from the surface roller (4), the
other press roller is separated from the surface roller (4), and the press roller
for winding roller (27) is separated from the winding roller (5).