BACKGROUND OF THE INVENTION
1. Field of the Invention
[0001] The present invention relates to the technology of a spinning machine that produces
spun yarn by a pneumatic spinning device, and relates more particularly to the technology
for improving manufacturing quality and productive capacity of the spinning machine
that produces spun yarn by the pneumatic spinning device.
2. Description of the Related Art
[0002] A pneumatic spinning device that twists a fiber bundle by whirling airflow to produce
spun yarn is conventionally known. The pneumatic spinning device supplies air to a
spinning chamber, to which a fiber bundle is fed, to generate whirling airflow , and
whirls the fiber bundle in the spinning chamber to produce spun yarn (as disclosed
in Patent Document 1, for example).
[0003] However, oiling agent is applied to some of synthetic fibers made of materials such
as polyester in order to reduce withdrawal resistance of fibers. When the pneumatic
spinning device is used for such a fiber bundle, there were cases where the oiling
agent is adhered to and accumulated in the spinning chamber. Then, when a spinning
operation is performed under a state in which the oiling agent is accumulated in the
spinning chamber, the pneumatic spinning device produces so-called weak yarn, in which
a yarn structure of the spun yarn is unstable. Accordingly, the spinning chamber had
to be regularly cleaned, which reduced productivity of the spinning machine.
[0004] Therefore, in order to prevent oiling agent from being accumulated or remove the
oiling agent, a pneumatic spinning device that supplies surfactant (surface-active
agent) to a spinning chamber has been proposed (as disclosed in Patent Document 2,
for example). However, when the oiling agent starts being adhered to and accumulated
in the spinning chamber, it becomes relatively difficult to remove the oiling agent
by applying surfactant. Therefore, there has been a demand for a technology that forms
a film and resolves oil by supplying cleanser to the spinning chamber so as to prevent
the oiling agent from being adhered in the spinning chamber or from being accumulated
therein.
[0005] Further, in a spinning machine including a plurality of spinning units, wherein each
of the spinning units has a pneumatic spinning device, a cleanser supplying device
may be provided in the each of the spinning units. However, such structure may cause
the spinning machine to become excessively large, the cost of the spinning machine
to be increased, and unevenness to be generated among each of the spinning units.
Accordingly, there has been a demand for a technology with a simple structure, capable
of supplying the cleanser evenly and stably to each of the pneumatic spinning devices.
Further, in order to be capable of producing spun yarn from all types of fiber bundles,
there has also been a demand for a technology that changes supplying mode of the cleanser
in accordance with characteristic of a fiber bundle.
[0006]
[Patent Document 1] Japanese Unexamined Patent Application Publication No. 2009-1935
[Patent Document 2] Japanese Unexamined Patent Application Publication No. 2008-95208
SUMMARY OF THE INVENTION
[0007] The present invention has been made to solve the above-described problems. It is
an object of the present invention to provide a small and low-cost spinning machine
capable of supplying cleanser evenly and stably to each of pneumatic spinning devices
and capable of changing supplying mode of the cleanser in accordance with characteristic
of a fiber bundle.
[0008] That is, the first invention relates to a spinning machine including a plurality
of spinning units, wherein each spinning unit has a pneumatic spinning device which
twists a fiber bundle by air. The spinning machine includes a compressed air feeding
device, a first air pipe, and a cleanser supplying device. The cleanser supplying
device adds cleanser to the air, which has been fed by the compressed air feeding
device and is flowing through the first air pipe. The air added with the cleanser
branches off and is fed to each of the pneumatic spinning devices.
[0009] According to the second invention, in the first invention, the spinning machine includes
a second air pipe which guides the air fed by the compressed air feeding device and
feeds the air to each of the pneumatic spinning devices. The second air pipe is an
air passage where air not added with the cleanser is guided through.
[0010] According to the third invention, in the second invention, the spinning machine can
switch the air to be fed to the pneumatic spinning device among the air flowing through
the first air pipe and the air flowing through the second air pipe.
[0011] According to the fourth invention, in the second invention, the first air pipe and
the second air pipe are arranged along a direction in which a plurality of pneumatic
spinning units are arranged.
[0012] According to the fifth invention, in any one of the first invention through the fourth
invention, the spinning machine includes an addition control section which controls
the cleanser supplying device. The addition control section determines whether or
not to add the cleanser to the air flowing through the first air pipe in accordance
with characteristic of the fiber bundle. When oiling agent is applied to the fiber
bundle, the addition control section controls the cleanser supplying device to add
the cleanser.
[0013] According to the sixth invention, in the fifth invention, the addition control section
determines an additive amount of the cleanser to be added to the air flowing through
the first air pipe in accordance with the characteristic of the fiber bundle. The
addition control section controls the cleanser supplying device to add an amount of
the cleanser that is appropriate according to the oiling agent added to the fiber
bundle.
[0014] According to the seventh invention, in the fifth invention or the sixth invention,
when at least one of the spinning units is producing spun yarn from the fiber bundle
added with the oiling agent, the addition control section controls the cleanser supplying
device to add cleanser to the air flowing through the first air pipe. When none of
the spinning units is producing spun yarn from the fiber bundle added with the oiling
agent, the addition control section controls the cleanser supplying device to stop
adding cleanser to the air flowing through the first air pipe.
[0015] According to the eighth invention, in any one of the first invention through the
seventh invention, the cleanser supplying device includes a cleanser tank which stores
the cleanser and a detecting section which detects an accumulated amount of the cleanser
in the cleanser tank. The spinning machine includes a spinning control section. The
spinning control section can receive a detection signal from the detecting section
and can control to activate or stop each of the spinning units. When the detecting
section detects that the accumulated amount of the cleanser is less than a prescribed
amount, the spinning control section controls all the spinning units to stop producing
spun yarn.
[0016] According to the first invention, since the air added with the cleanser branches
off and is fed to each of the pneumatic spinning devices, the cleanser can be evenly
and stably supplied to the each of the pneumatic spinning devices. Accordingly, oiling
agent applied to a fiber bundle is prevented from being adhered to and accumulated
in a spinning chamber, and manufacturing quality and productivity of the spinning
machine can be improved. Further, when compared with the conventional structure in
which a cleanser supplying device is provided to each spinning unit, the structure
of the above-described spinning machine is simple. As a result, the size and manufacturing
costs of the spinning machine can be reduced.
[0017] According to the second invention, by providing the air passage where the cleanser
is not added to air, the air not added with the cleanser can be fed to the pneumatic
spinning device. Accordingly, the pneumatic spinning device can perform a spinning
operation by the air not added with the cleanser.
[0018] According to the third invention, whether a spinning operation is performed by the
air added with the cleanser or by the air not added with the cleanser can be reliably
switched. Therefore, when producing spun yarn from a fiber bundle added with the oiling
agent, the spinning operation can be performed by the air added with the cleanser.
Accordingly, the oiling agent applied to the fiber bundle is prevented from being
adhered to and accumulated in the spinning chamber, and manufacturing quality and
productivity of the spinning machine can be improved.
[0019] According to the fourth invention, when compared with the conventional structure
in which the cleanser supplying device is provided to each spinning unit, the structure
of the above-described spinning machine can be made even more simple. As a result,
the size and the manufacturing costs of the spinning machine can be reduced.
[0020] According to the fifth invention, when producing spun yarn from a fiber bundle added
with the oiling agent, the spinning operation can be performed by the air added with
the cleanser. Accordingly, the oiling agent applied to the fiber bundle is prevented
from being adhered to and accumulated in the spinning chamber, and manufacturing quality
and productivity of the spinning machine can be improved.
[0021] According to the sixth invention, the spinning operation can be performed by air
added with an amount of the cleanser that is appropriate according to an amount of
oiling agent applied to the fiber bundle. Accordingly, the oiling agent applied to
the fiber bundle is prevented from being adhered to and accumulated in the spinning
chamber, and manufacturing quality and productivity of the spinning machine can be
improved. Further, the spinning machine can produce spun yarn from all types of fiber
bundles.
[0022] According to the seventh invention, when at least one of the plurality of spinning
units is producing spun yarn, the cleanser supplying device can supply the air added
with the cleanser to the pneumatic spinning device of each of the spinning units through
the first air pipe. Accordingly, the oiling agent applied to the fiber bundle is prevented
from being adhered to and accumulated in the spinning chamber; consequently, manufacturing
quality and productivity of the spinning machine can be improved. Further, when none
of the spinning units is producing spun yarn, since the cleanser supplying device
stops adding the cleanser to air, cleanser consumption can be reduced. Consequently,
manufacturing costs of the spun yarn can be reduced.
[0023] According to the eighth invention, when the detecting section detects that the accumulated
amount of the cleanser in the cleanser tank is less than the prescribed amount, production
of the spun yarn can be stopped in all of the spinning units. Consequently, when producing
spun yarn from the fiber bundle added with the oiling agent, the spinning operation
can be prevented from being performed by the air not added with the cleanser. Accordingly,
the oiling agent applied to the fiber bundle is prevented from being adhered to and
accumulated in the spinning chamber, and manufacturing quality and productivity of
the spinning machine can be improved.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024]
Fig. 1 is a view illustrating an overall structure of a spinning machine 100.
Fig. 2 is a view illustrating a spinning unit 1 of the spinning machine 100.
Fig. 3 is a view illustrating a pneumatic spinning device 6 of the spinning unit 1.
Fig. 4 is a view illustrating an air distribution device 2 and a cleanser supplying
device 3 of the spinning machine 100.
Fig. 5 is a view illustrating a state in which weak yarn is produced due to oiling
agent being accumulated in a spinning chamber 65.
Fig. 6 is a table illustrating a control map for changing supplying mode of cleanser
in accordance with characteristic of a fiber bundle F.
Fig. 7 is another view illustrating the air distribution device 2 and the cleanser
supplying device 3 of the spinning machine 100.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0025] By referring to Fig. 1, a description will be made on an overall structure of a spinning
machine 100 according to an embodiment of the present invention. As illustrated in
Fig. 1, the spinning machine 100 includes a plurality of spinning units 1 which produce
spun yarn Y from a fiber bundle (which will hereinafter be referred to as a "sliver")
F. Further, the spinning machine 100 is provided with an air distribution device 2
(not illustrated in Fig. 1; refer to Fig. 4) and a cleanser supplying device 3 (not
illustrated in Fig. 1; refer to Fig. 4). The air distribution device 2 can feed air
to a pneumatic spinning device 6 provided in each of the spinning units 1. The cleanser
supplying device 3 can add cleanser to the air to be fed to the pneumatic spinning
device 6.
[0026] First, by referring to Fig. 2, each spinning unit 1 will be described in detail.
The spinning unit 1 mainly includes a sliver feeding unit 4, a draft device 5, a pneumatic
spinning device 6, a yarn feeding device 7, a yarn defect detecting and removing device
8, and a winding device 9, which are arranged in this order along a direction in which
the sliver F and the spun yarn Y are fed.
[0027] The sliver feeding unit 4 includes a sliver case 41 where the sliver F, which is
a material, is accumulated and a sliver guide that guides the sliver F to the draft
device 5. The sliver feeding unit 4 feeds the sliver F accumulated in the sliver case
41 to the draft device 5.
[0028] The draft device 5 drafts the sliver F by a plurality of pairs of draft rollers and
feeds out the sliver F to the pneumatic spinning device 6. The draft device 5 includes
four pairs of draft rollers. The draft device 5 includes a pair of back draft rollers
51, a pair of third draft rollers 52, a pair of middle draft rollers 53, and a pair
of front draft rollers 54, which are arranged in this order along a direction in which
the sliver F is fed.
[0029] The four pairs of draft rollers include bottom rollers 51A, 52A, 53A, and 54A, which
are rotated by driving sources (not illustrated in the drawings), and top rollers
51B, 52B, 53B, and 54B, which are arranged to make contact with the bottom rollers
51A, 52A, 53A, and 54A to be driven and rotated. Rotational speed of each pair of
the draft rollers 51, 52, 53, and 54 is set to be increased sequentially along a direction
in which the sliver F is fed.
[0030] In such a structure, the sliver F, which is nipped by each of the bottom rollers
51A, 52A, 53A, and 54A and each of the top rollers 51B, 52B, 53B, and 54B, is fed
out following rotation of the pairs of draft rollers 51, 52, 53, and 54. Each time
the sliver F passes through each pair of the draft rollers 51, 52, 53, and 54, the
speed of the sliver F increases. Consequently, the sliver F is drafted between adjacent
pairs of draft rollers 51, 52, 53, and 54.
[0031] The pneumatic spinning device 6 twists the sliver F drafted by the draft device 5
to produce the spun yarn Y. As illustrated in Fig. 3, the pneumatic spinning device
6 mainly includes a guide member 61, a spindle member 62, and a nozzle member 63.
Further, the arrows in Fig. 3 indicate a direction in which the sliver F and the spun
yarn Y are fed and also a direction in which the fed air flows.
[0032] The guide member 61 is a member which constitutes a portion of a spinning chamber
65. A yarn passage 61a is formed in the guide member 61 so as to be connected with
the spinning chamber 65. The guide member 61 guides the sliver F drafted by the draft
device 5 to the spinning chamber 65 through the yarn passage 61a. Further, according
to the present embodiment, the guide member 61 is provided with a needle member 61b.
The needle member 61b guides the spun yarn Y, which is twisted and produced in the
spinning chamber 65, to a yarn passage 62a which will be described later. Further,
instead of providing the guide member 61 with the needle member 61b, the function
of the needle member 61b may be implemented by a downstream end edge of the guide
member 61.
[0033] The spindle member 62 is a member which also constitutes a portion of the spinning
chamber 65. The spindle member 62 is provided with a yarn passage 62a that is connected
with the spinning chamber 65. The spindle member 62 feeds out the spun yarn Y, which
is twisted and produced in the spinning chamber 65, through a yarn passage 62a. More
specifically, the spun yarn Y, which is twisted and produced in the spinning chamber
65, is guided to the yarn passage 62a by the needle member 61b of the guide member
61, and is fed out through the yarn passage 62a to the yarn feeding device 7.
[0034] The nozzle member 63 is a member which also constitutes a portion of the spinning
chamber 65. The nozzle member 63 is provided with a plurality of air passages 63a
that are connected with the spinning chamber 65. The nozzle member 63 generates whirling
airflow in the spinning chamber 65 by feeding air to the spinning chamber 65 through
the air passages 63a. More specifically, compressed air, which has been fed from a
compressed air feeding device 21 which will be described later, is fed to the spinning
chamber 65 through the air passages 63a, and becomes whirling airflow in the spinning
chamber 65.
[0035] The nozzle member 63 will be described further in detail. The plurality of air passages
63a are arranged radially in the nozzle member 63 so as to be connected with the spinning
chamber 65. In order to prevent a flow direction of air injected from the air passages
63a from intersecting with the central axis of the spinning chamber 65, the air passages
63a are formed in a manner that the flow direction of the air of the air passages
63a are displaced from the central axis in the same direction. The air injected through
the air passages 63a flows along the internal surface of the nozzle member 63 and
forms the whirling airflow.
[0036] In such a structure, the pneumatic spinning device 6 can twist the sliver F by having
each of fibers of the sliver F reversed and whirled by the whirling airflow (refer
to the alternate long and double-short dashed line in Fig. 5). As described above,
the pneumatic spinning device 6 produces the spun yarn Y.
[0037] The yarn feeding device 7 feeds out the spun yarn Y produced by the pneumatic spinning
device 6 to the winding device 9. The yarn feeding device 7 includes a delivery roller
71 and a nip roller 72. The spun yarn Y fed out from the pneumatic spinning device
6 is nipped between the delivery roller 71 and the nip roller 72, and is fed out following
rotation of the delivery roller 71 and the nip roller 72.
[0038] The yarn defect detecting and removing device 8 detects and removes a yarn defect
in the spun yarn Y (i.e., a failure portion in the spun yarn Y) before the spun yarn
Y is fed to the winding device 9. The yarn defect detecting and removing device 8
is provided with a cutting device (not illustrated in the drawings) that cuts off
and removes a yarn defect in the spun yarn Y. The spun yarn Y, which has been cut
off and of which the yarn defect has been removed, is spliced together by a yarn splicing
device (not illustrated in the drawings) provided in the spinning machine 100, and
is wound into a package 91 which will be described later. As described above, the
yarn defect detecting and removing device 8 prevents the spun yarn Y having a yarn
defect from being wound into the package 91.
[0039] The yarn defect detecting and removing device 8 is electrically connected to a control
device C (refer to Fig. 4). When the spun yarn Y passes through the yarn defect detecting
and removing device 8, the yarn defect detecting and removing device 8 detects a yarn
travelling signal. The yarn travelling signal is transmitted to the control device
C from the yarn defect detecting and removing device 8. The control device C constantly
monitors operational status of the spinning unit 1 by receiving the yarn travelling
signal detected by the yarn defect detecting and removing device 8. When the yarn
travelling signal cannot be received, the control device C determines that production
of the spun yarn Y has been stopped due to some reason.
[0040] The winding device 9 forms the package 91 by winding the spun yarn Y while traversing
the spun yarn Y in an axial direction of a bobbin 92. The package 91 or the bobbin
92 is driven and rotated by receiving driving force of a driving drum 93, and the
spun yarn Y is wound around the package 91. Further, although a cheese-shaped package
P is illustrated in Fig. 2, the winding device 9 can also wind the spun yarn Y into
a cone-shaped package P.
[0041] As described above, the spinning unit 1 drafts the sliver F by the draft device 5,
and twists the drafted sliver F by the pneumatic spinning device 6 to produce the
spun yarn Y. Further, the spinning unit 1 cuts off and removes a yarn defect by the
yarn defect detecting and removing device 8, and winds the spun yarn Y, of which yarn
quality has been improved, by the winding device 9 in order to produce the package
91.
[0042] Further, the spinning unit 1 may include a yarn accumulating roller between the yarn
feeding device 7 and the yarn defect detecting and removing device 8. The yarn accumulating
roller winds the spun yarn Y around an outer peripheral surface of the rotating yarn
accumulating roller to temporarily accumulate the spun yarn Y. Consequently, even
during a yarn splicing operation, for example, the yarn accumulating roller can prevent
the spun yarn Y, which is continuously fed out from the pneumatic spinning device
6, from slackening. Further, since the yarn accumulating roller winds the spun yarn
Y around an outer peripheral surface thereof to temporarily accumulate the spun yarn
Y, even when fluctuations in tension in the winding device 9 are generated, for example,
the fluctuations can be prevented from being propagated to the pneumatic spinning
device 6.
[0043] Further, the spinning unit 1 may include the above-described yarn accumulating roller
in place of the yarn feeding device 7. The yarn accumulating roller winds the spun
yarn Y around the rotating yarn accumulating roller, and unwinds the spun yarn Y to
feed out the spun yarn Y. Therefore, to the yarn accumulating roller can pull out
the spun yarn Y from the pneumatic spinning device 6 while applying a prescribed tension
to the spun yarn Y, and feed out the spun yarn Y to the winding device 9.
[0044] Next, by referring to Fig. 4, the air distribution device 2 and the cleanser supplying
device 3 will be described in detail. Further, the arrows in the Fig. 4 indicate a
direction of airflow.
[0045] The air distribution device 2 includes the compressed air feeding device 21, a first
air pipe 22, a first distribution pipe 23, a second air pipe 24, a second distribution
pipe 25.
[0046] The compressed air feeding device 21 is a device that compresses air in order to
feed the compressed air to the pneumatic spinning device 6 of each of the spinning
units 1. The compressed air feeding device 21 mainly includes an electric compressor,
which drives an electric motor to compress air, or the like. Pressure of the compressed
air fed by the compressed air feeding device 21 is adjusted by a pressure adjusting
valve 211. Consequently, an airflow rate of the air, which is fed to the first air
pipe 22 and the second air pipe 24, is adjusted.
[0047] The first air pipe 22 is an air passage where the air compressed by the compressed
air feeding device 21 is guided through. In the spinning machine 100 in which the
plurality of spinning units 1 are arranged next to one another, the first air pipe
22 is arranged parallel to a direction in which the spinning units 1 are arranged
next to one another.
[0048] The first distribution pipe 23 is an air passage where air flowing through the first
air pipe 22 branches off and is guided through to the pneumatic spinning device 6.
One end of the first distribution pipe 23 is connected to the pneumatic spinning device
6. The other end of the first distribution pipe 23 is connected to the intermediate
portion of the first air pipe 22. Accordingly, the first distribution pipe 23 can
feed the air flowing through the first air pipe 22 to the pneumatic spinning device
6. Further, the air to be guided through the first distribution pipe 23 to the pneumatic
spinning device 6 is controlled by an open/close valve 231 arranged at the intermediate
portion of the first distribution pipe 23.
[0049] The second air pipe 24 is an air passage where the air compressed by the compressed
air feeding device 21 is guided through. In the spinning machine 100 in which the
plurality of spinning units 1 are arranged next to one another, the second air pipe
24 is arranged parallel to the direction in which the spinning units 1 are arranged
next to one another.
[0050] The second distribution pipe 25 is an air passage where air flowing through the second
air pipe 24 branches off and is guided through to the pneumatic spinning device 6.
One end of the second distribution pipe 25 is connected to the pneumatic spinning
device 6. The other end of the second distribution pipe 25 is connected to the intermediate
portion of the second air pipe 24. Accordingly, the second distribution pipe 25 can
feed the air flowing through the second air pipe 24 to the pneumatic spinning device
6. Further, the air to be guided through the second distribution pipe 25 to the pneumatic
spinning device 6 is controlled by an open/close valve 251 arranged at the intermediate
portion of the second distribution pipe 25.
[0051] The cleanser supplying device 3 mainly includes a branching pipe 31, an air compressing
device 32, a cleanser tank 33, and a cleanser supplying pipe 34.
[0052] The branching pipe 31 is an air passage where the air flowing through the first air
pipe 22 branches off and is fed through to the cleanser tank 33. One end of the branching
pipe 31 is connected to the cleanser tank 33. The other end of the branching pipe
31 is connected to the intermediate portion of the first air pipe 22. Accordingly,
the branching pipe 31 can feed the air flowing through the first air pipe 22 to the
cleanser tank 33. Further, a supplying amount of air to be guided through the branching
pipe 31 to the cleanser tank 33 is appropriately adjusted by a valve 311 arranged
at the intermediate portion of the branching pipe 31.
[0053] The air compressing device 32 is a device that compresses the air which has branched
off from the first air pipe 22 by the branching pipe 31. The air compressing device
32 mainly includes an electric compressor, which drives an electric motor to compress
air. Further, the air compressing device 32 is electrically connected to the control
device C. The air compressing device 32 can appropriately change an operational state
thereof by receiving a control signal from the control device C.
[0054] The cleanser tank 33 is a tank that stores the cleanser. The cleanser tank 33 is
provided with a level sensor 331. The level sensor 331 is a detection section that
detects an accumulated amount of the cleanser in the cleanser tank 33. The level sensor
331 is electrically connected to the control device C. A detection signal detected
by the level sensor 331 is transmitted from the level sensor 331 to the control device
C. The control device C monitors the accumulated amount of the cleanser by receiving
the detection signal detected by the level sensor 331. When receiving a detection
signal indicating a prescribed amount, the control device C determines that the accumulated
amount of cleanser is low.
[0055] For example, the cleanser, which is stored in the cleanser tank 33, is hydrocarbon
system cleanser, alcohol system cleanser, or the like. The cleanser forms a film or
resolves oil in the spinning chamber 65 to prevent the oiling agent from being adhered
to the spinning chamber 65 or from being accumulated therein. Further, the cleanser
cannot be limited to a certain type of cleanser or a cleanser with a specific product
name. This is because according to a type, an amount, or the like of oiling agent
applied to the sliver F, it is necessary to appropriately use the most suitable cleanser
for the sliver F.
[0056] The cleanser supplying pipe 34 is a cleanser passage for adding the cleanser to the
air flowing through the first air pipe 22. One end of the cleanser supplying pipe
34 is arranged to be opened at the bottom of the cleanser tank 33 or in the vicinity
thereof. The other end of the cleanser supplying pipe 34 is connected to upstream
of a branch point where the air flowing through the first air pipe 22 branches off
to the pneumatic spinning device 6. Accordingly, the air added with the cleanser can
be fed to each of the pneumatic spinning devices 6.
[0057] By such a structure, the cleanser supplying device 3 branches off portion of the
air flowing through the first air pipe 22, and compresses such the air. Accordingly,
internal pressure of the cleanser tank 33 can be increased by the compressed air.
Since the internal pressure of the cleanser tank 33 has been increased, the cleanser
supplying device 3 can push the cleanser into the first air pipe 22 through the cleanser
supplying pipe 34. Accordingly, the cleanser supplying device 3 can add the cleanser
to the air flowing through the first air pipe 22. The cleanser added to the air flowing
through the first air pipe 22 is evenly and stably supplied to each of the pneumatic
spinning devices 6 such that the cleanser is sprayed in the form of a mist.
[0058] The spinning machine 100 of the present embodiment is formed such that the air added
with the cleanser is branched off and fed to all the pneumatic spinning devices 6.
However, when the plurality of spinning units 1 are divided into a plurality of groups,
the cleanser supplying device 3 and the compressed air feeding device 21 may be provided
in each group.
[0059] Further, the cleanser supplying device 3 of the present embodiment increases internal
pressure of the cleanser tank 33 by the compressed air and adds the cleanser to the
air flowing through the first air pipe 22. However, the cleanser supplying device
3 may use an electric pump or the like to push the cleanser out of the cleanser tank
33 to add the cleanser to the air flowing through the first air pipe 22.
[0060] Next, by referring to Fig. 5, a description will be made on reasons why weak yarn
is produced due to accumulation of the oiling agent in the spinning chamber 65. Specifically,
a description will be made on reasons why weak yarn is produced due to the accumulation
of the oiling agent in the spinning chamber 65 when the spun yarn Y is produced from
the sliver F added with the oiling agent such as polyester. Further, the arrows in
Fig. 5 indicate a direction in which the sliver F and the spun yarn Y are fed and
also a direction in which the fed air flows.
[0061] As described above, the sliver F added with the oiling agent is guided through the
yarn passage 61a of the guide member 61 to the spinning chamber 65. Each of fibers
of the sliver F is reversed and whirled in the spinning chamber 65 by whirling airflow
(refer to the alternate long and double-short dashed line in Fig. 5) . At this point
of time, the oiling agent, which has been added to each fiber, is removed from the
whirling fibers by the whirling airflow, and adheres to a peripheral surface of the
spindle member 62. Adhesion of the oiling agent from each fiber is continuously repeated,
and the oiling agent is thickly accumulated on the peripheral surface of the spindle
member 62.
[0062] As described above, the oiling agent accumulated on the peripheral surface of the
spindle member 62 becomes resistance to the fibers (refer to the alternate long and
double-short dashed line in Fig. 5) which whirls while being wound around the peripheral
surface of the spindle member 62. That is, the accumulated oiling agent consequently
causes so-called weak yarn, which has unstable yarn structure, to be produced.
[0063] Accordingly, in order to prevent the weak yarn from being produced, it is necessary
to prevent the oiling agent applied to the sliver F from being adhered to and accumulated
in the spinning chamber 65. Particularly, it is necessary to prevent the oiling agent
applied to the sliver F from being adhered to and accumulated on the spindle member
62 which constitutes a portion of the spinning chamber 65. Accordingly, it becomes
important to add an appropriate amount of cleanser to air and to evenly and stably
feed the air added with the cleanser to each of the pneumatic spinning devices 6.
[0064] As described above, in the spinning machine 100, the cleanser supplying device 3
adds the cleanser to the air for preventing the oiling agent from being adhered or
from being accumulated, and the air is branched off and fed to each of the pneumatic
spinning devices 6. Consequently, the spinning machine 100 can supply the cleanser
evenly and stably to the each of the pneumatic spinning devices 6. Accordingly, the
oiling agent applied to the sliver F can be prevented from being adhered to and accumulated
in the spinning chamber 65. Consequently, manufacturing quality of the spun yarn Y
produced by the spinning machine 100 can be improved. Further, since the oiling agent
is not adhered to and accumulated in the spinning chamber 65, it becomes unnecessary
to perform regular cleaning. Consequently, productivity of the spinning machine 100
producing the spun yarn Y can be improved.
[0065] Furthermore, since the air added with the cleanser is branched off and fed to each
of the pneumatic spinning devices 6 in the spinning machine 100, the structure of
the spinning machine 100 can be made simple in which one air distribution device 2
and one cleanser supplying device 3 are arranged. Accordingly, the size and the costs
of the spinning machine 100 can be reduced. Particularly, since the first air pipe
22 and the second air pipe 24 are provided along a direction in which the plurality
of spinning units 1 are arranged in the spinning machine 100, the structure of the
spinning machine 100 can be even more simplified. Consequently, the size and the costs
of the spinning machine 100 can be reduced.
[0066] Next, a description will be made on a structure in which supplying mode of the cleanser
is changed in accordance with characteristic of the sliver F.
[0067] As described above, among slivers of synthetic fibers made of materials such as polyester,
there are slivers F added with the oiling agent. However, among slivers of plant fibers
such as cotton or flax, there is no sliver F added with the oiling agent. Accordingly,
when producing the spun yarn Y from the sliver F not added with the oiling agent,
the spinning machine 100 stops adding the cleanser to air to be fed to the pneumatic
spinning device 6. Further, when producing the spun yarn Y from the sliver F added
with the oiling agent, the spinning machine 100 changes an additive amount of cleanser
to be added to the air to be fed to the pneumatic spinning device 6 in accordance
with the characteristic of the sliver F.
[0068] Stopping of addition of the cleanser and changing of the additive amount of the cleanser
are performed by the control device C controlling an operating state of the air compressing
device 32. Specifically, the control device C includes an addition control section
C1. The addition control section C1 retrieves from a control map M, the additive amount
of the cleanser according to the characteristic of the sliver F. The addition control
section C1 transmits a control signal, which corresponds to the retrieved additive
amount of the cleanser, to the air compressing device 32. Further, the control map
M is data storing an appropriate amount of the cleanser to be added that has been
previously found through experiments in order to prevent the oiling agent from being
adhered to and accumulated the spinning chamber 65 (refer to Fig. 6).
[0069] As illustrated in Fig. 6, when producing the spun yarn Y from a sliver F1 not added
with the oiling agent, the addition control section C1 controls the air compressing
device 32 not to add the cleanser to the air flowing through the first air pipe 22.
Further, in the spinning machine 100 according to the present embodiment, a valve
221 arranged upstream of the first air pipe 22 is closed, and a valve 241 arranged
upstream of the second air pipe 24 is opened. Accordingly, the spinning machine 100
can supply air flowing through the second air pipe 24 to the pneumatic spinning devices
6, and the spinning operation can be performed only by air not added with the cleanser.
[0070] Meanwhile, as illustrated in Fig. 6, when producing the spun yarn Y from slivers
F2, F3, or F4 added with the oiling agent, the addition control section C1 controls
the air compressing device 32 to add the cleanser to the air flowing through the first
air pipe 22. Further, in the spinning machine 100 according to the present embodiment,
the valve 221 arranged upstream of the first air pipe 22 is opened, and the valve
241 arranged upstream of the second air pipe 24 is closed. Accordingly, the spinning
machine 100 can supply the air flowing through the first air pipe 22 to the pneumatic
spinning devices 6, and the spinning operation can be performed by air added with
the cleanser.
[0071] The spinning machine 100 includes the first air pipe 22 where the cleanser is added
to air and the second air pipe 24 where the cleanser is not added to air. Therefore,
the spinning machine 100 can reliably switch as to whether to perform the spinning
operation by the air added with the cleanser or by the air not added with the cleanser.
Further, as illustrated in Fig. 7, even when the second air pipe 24 is not provided,
the spinning machine 100 can switch whether or not to add the cleanser to air just
by controlling the operational state of the air compressing device 32. In this case,
it is possible to further simplify the structure of the spinning machine 100.
[0072] For example, when producing the spun yarn Y from the sliver F4 added with a large
amount of oiling agent, if a large amount of cleanser is not added to the air, the
oiling agent cannot be prevented from being accumulated. Therefore, the spinning machine
100 adjusts an amount of the cleanser to be added to air to an appropriate amount
in accordance with characteristic of the sliver F4. In this case, the addition control
section C1 controls the air compressing device 32 to increase pressure of the air.
[0073] As described above, the spinning machine 100 can change the additive amount of the
cleanser in accordance with the characteristic of the sliver F. That is, when producing
the spun yarn Y from the sliver F added with the oiling agent, the spinning machine
100 can add an appropriate amount of the cleanser to the air to be supplied to the
pneumatic spinning devices 6 in accordance with the characteristic of the sliver F.
Accordingly, the oiling agent applied to the sliver F is prevented from being adhered
to the spinning chamber 65 and from being accumulated therein, and manufacturing quality
and productivity of the spinning machine 100 can be improved. Furthermore, the spinning
machine 100 can produce the spun yarn Y from various types of slivers F.
[0074] Next, a description will be made on a structure in which when at least one of the
plurality of spinning units 1 is producing the spun yarn Y, the cleanser is added
to air, and when none of the spinning units 1 is producing the spun yarn Y, the cleanser
is stopped being added to the air.
[0075] Such a structure can be accomplished by the control device C monitoring operational
status of each of the spinning units 1. Specifically, a spinning control section C2
of the control device C can receive a yarn travelling signal from the yarn defect
detecting and removing device 8 of each of the spinning units 1. When receiving the
yarn travelling signal from at least one of the yarn defect detecting and removing
devices 8, the spinning control section C2 controls the air compressing device 32
to add the cleanser.
[0076] Meanwhile, when the spinning control section C2 cannot receive a yarn travelling
signal from all of the yarn defect detecting and removing devices 8, the spinning
control section C2 determines that none of the spinning units 1 is producing the spun
yarn Y. Then, the spinning control section C2 controls the air compressing device
32 not to add the cleanser.
[0077] In such a structure, when at least one of the spinning units 1 is producing the spun
yarn Y, the spinning machine 100 can supply the air added with the cleanser to the
pneumatic spinning devices 6 in the spinning units 1. Accordingly, the oiling agent
applied to the sliver F is prevented from being adhered to the spinning chamber 65
and from being accumulated therein, and manufacturing quality and productivity of
the spinning machine 100 can be improved. When none of the spinning units 1 is producing
the spun yarn Y, the cleanser supplying device 3 stops adding the cleanser to the
air. Consequently, cleanser consumption in the spinning machine 100 can be reduced,
and manufacturing costs of the spun yarn Y can be reduced.
[0078] Furthermore, when none of the spinning units 1 is producing the spun yarn Y and cannot
restart producing the spun yarn Y promptly, the spinning machine 100 stops driving
of the compressed air feeding device 21 in addition to stopping the addition of the
cleanser. Accordingly, the spinning machine 100 can further reduce manufacturing costs
of the spun yarn Y.
[0079] Next, a description will be made on a structure in which when an accumulated amount
of the cleanser in the cleanser tank 33 is less than a prescribed amount, all of the
spinning units 1 stop producing the spun yarn Y.
[0080] Such a structure is accomplished by having the accumulated amount of the cleanser
in the cleanser tank 33 monitored by the control device C. Specifically, the spinning
control section C2 receives a detection signal from the level sensor 331 provided
at the cleanser tank 33 and monitors the accumulated amount of the cleanser. When
the detection signal from the level sensor 331 becomes less than a prescribed amount,
the spinning control section C2 controls all the spinning units 1 to stop producing
the spun yarn Y. Specifically, the spinning control section C2 stops driving sources
of the draft device 5, the yarn feeding device 7, and the winding device 9 or the
like in the spinning units 1. Furthermore, the spinning control section C2 controls
the air compressing device 32 to stop adding the cleanser.
[0081] In such a structure, when the level sensor 331 of the cleanser tank 33 detects that
the accumulated amount of the cleanser is less than the prescribed amount, all the
spinning units 1 are controlled to stop producing the spun yarn Y in the spinning
machine 100. Therefore, when producing the spun yarn Y from the sliver F added with
the oiling agent, the spinning operation can be prevented from being performed by
air not added with the cleanser. Accordingly, the oiling agent added to the sliver
F is prevented from being adhered to the spinning chamber 65 and from being accumulated
therein. Consequently, manufacturing quality and productivity of the spinning machine
100 can be improved.
[0082] Further, in the spinning machine 100 according to the present embodiment, the sliver
F is fed from top to bottom. However, the present invention is not limited to such
an embodiment. For example, a can storing the sliver F may be arranged in a lower
portion of the spinning machine 100 and the winding device 9 may be arranged in an
upper portion of the spinning machine 100.