TECHNICAL FIELD
[0001] One aspect of the present disclosure relates to a periodic unevenness detecting method, a textile processing system, a spinning machine, and a periodic unevenness detecting program.
BACKGROUND
10 [0002] Conventionally, a spinning machine including a drafting device configured to draft a fiber bundle, a spinning device configured to twist the drafted fiber bundle to produce yarn, and a winding apparatus configured to wind the yarn to form a package has been known (for
example, see Japanese Unexamined Patent Publication No.
15 2014-009422 and Japanese Unexamined Patent Publication No.
H07-138822). A fiber bundle processed by an upstream process
machine, such as a drawing machine, for example is supplied to such a
spinning machine.
SUMMARY
20 [0003] In the fiber bundle supplied to a downstream process machine
such as the above-described spinning machine, thickness unevenness of
a short wavelength (a high frequency) that is not detectable by a
measuring instrument may be included. Such unevenness may appear
as periodic unevenness, after drafting in the downstream process
25 machine. In order to improve the quality of the fiber bundle produced
in the downstream process machine, it is preferable that the occurrence
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of such periodic unevenness be reduced.
[0004] An object of one aspect of the present disclosure is to provide a
periodic unevenness detecting method, a textile processing system, a
spinning machine, and a periodic unevenness detecting program capable
5 of improving the quality of a fiber bundle.
[0005] A periodic unevenness detecting method according to one aspect
of the present disclosure is a periodic unevenness detecting method
executed in a textile processing system in which a first fiber bundle that
is produced by an upstream process machine is at least drafted by a
10 downstream process machine to produce a second fiber bundle, and the
periodic unevenness detecting method includes a first acquisition step of
acquiring first information concerning the upstream process machine, a
thickness unevenness detecting step of detecting thickness unevenness
information concerning periodic unevenness of thickness in the second
15 fiber bundle, and a periodic unevenness identifying step of identifying,
based on the first information, the thickness unevenness information,
and a total drafting ratio in the downstream process machine, periodic
unevenness occurring in the second fiber bundle due to the upstream
process machine.
20 [0006] Accordingly, when the periodic unevenness due to the upstream
process machine is identified, the occurrence of the relevant periodic
unevenness can be avoided by changing an operating condition of the
upstream process machine or by eliminating the defect that has occurred
in the upstream process machine, for example. Thus, according to this
25 periodic unevenness detecting method, the quality of the fiber bundle
can be improved.
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[0007] In the periodic unevenness identifying step, the periodic
unevenness may be identified by using, as the thickness unevenness
information, a frequency distribution of or a wavelength distribution of
the periodic unevenness of thickness in the second fiber bundle. In
5 this case, because an interval of the periodic unevenness included in the
first fiber bundle is increased as the first fiber bundle is drafted by the
downstream process machine, the periodic unevenness due to the
upstream process machine can be identified more suitably.
[0008] Provided that a reference distribution may be a distribution
10 calculated based on fineness, an average thickness, and a rate of fiber
lengths of the first fiber bundle, and the total draft ratio, in the periodic
unevenness identifying step, the periodic unevenness may be identified
based on a comparison result of the reference distribution with the
frequency distribution, or based on a comparison result of the reference
15 distribution with the wavelength distribution. In this case, by referring
to the reference distribution also, the periodic unevenness due to the
upstream process machine can be identified further accurately.
[0009] In the periodic unevenness identifying step, the periodic
unevenness may be identified by determining whether a peak
20 corresponding to the periodic unevenness has appeared in the frequency
distribution or the wavelength distribution. In this case, the periodic
unevenness due to the upstream process machine can be identified more
accurately.
[0010] The periodic unevenness detecting method according to one
25 aspect of the present disclosure may further include a first output step of
outpurting the frequency distribution or the wavelength distribution to a
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display screen, and in the first output step, a peak that appears in the
frequency distribution or the wavelength distribution may be displayed
in a display form different from a display form of portions other than the
peak in the frequency distribution or the wavelength distribution. In
5 this case, an operator who visually confirmed the display screen can
find with ease the peak that appears in the frequency distribution or the
wavelength distribution.
[0011] In the periodic unevenness identifying step, a cause of the
periodic unevenness may be predicted based on the first information and
10 the thickness unevenness information. In this case, the cause of the
periodic unevenness that is due to the upstream process machine can be
learnt.
[0012] The periodic unevenness detecting method according to one
aspect of the present disclosure may further include a second acquisition
15 step of acquiring second information concerning the downstream
process machine, and in the periodic unevenness identifying step, the
periodic unevenness may be identified based on the second information
further. In this case, because the periodic unevenness due to the
upstream process machine and the periodic unevenness due to the
20 downstream process machine can be distinguished, the periodic
unevenness due to the upstream process machine can be identified
further accurately.
[0013] The upstream process machine may produce the first fiber
bundle by drafting a fiber bundle, and the downstream process machine
25 may draft the first fiber bundle at a drafting ratio higher than the
drafting ratio in the upstream process machine. In this case, because
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the periodic unevenness due to the upstream process machine easily
appears, the periodic unevenness due to the upstream process machine
can be identified further suitably.
[0014] The downstream process machine may include a drafting device
5 configured to draft the first fiber bundle, a spinning device configured to
twist the first fiber bundle drafted by the drafting device and to produce
yarn as the second fiber bundle, and a winding apparatus configured to
wind the yarn and to form a package. In this case, because the drafting
ratio in such a downstream process machine is high in general, the
10 periodic unevenness due to the upstream process machine can be
identified further suitably.
[0015] The upstream process machine may include a plurality of roller
pairs each having a drive roller and a driven roller, and may produce the
first fiber bundle by drafting, by the first roller pairs, a fiber bundle that
15 is supplied to the upstream process machine, and the first information
may include at least one of a diameter of the drive roller, the number of
teeth of a pulley of the drive roller, a pitch of grooves formed on the
drive roller, the number of teeth of a drive gear of the drive roller, a
contact pressure between the drive roller and the driven roller, and a
20 diameter of a can in which a fiber bundle produced by the upstream
process machine is accommodated. In this case, because the period at
which the periodic unevenness may occur can be predicted, the periodic
unevenness due to the upstream process machine can be identified
further suitably.
25 [0016] The periodic unevenness detecting method according to one
aspect of the present disclosure may further include a second output step
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of outputting information for eliminating the periodic unevenness, when
the periodic unevenness is identified at the periodic unevenness
identifying step. In this case, when the periodic unevenness due to the
upstream process machine is identified, measures to avoid the
5 occurrence of the relevant periodic unevenness can be urged.
[0017] In the first acquisition step, the first information may be
acquired by at least one of operating input and communication.
Alternatively, in the first acquisition step, the first information may be
acquired by reading, by a reading device, information on an information
10 tag provided to a can in which the first fiber bundle is accommodated.
[0018] A spinning machine according to one aspect of the present
disclosure is a spinning machine configured to execute the
above-described periodic unevenness detecting method as the
downstream process machine, and includes a drafting device configured
15 to draft the first fiber bundle, a spinning device configured to twist the
drafted first fiber bundle and to produce yarn as the second fiber bundle,
a winding apparatus configured to wind the yarn and to form a package,
a first acquisition device configured to acquire the first information, a
thickness unevenness detector configured to detect the thickness
20 unevenness information, and a periodic unevenness identifying device
configured to identify, based on the first information, the thickness
unevenness information, and the total drafting ratio, periodic
unevenness occurring in the yarn due to the upstream process machine.
According to this spinning machine, due to the above-described reasons,
25 the quality of the fiber bundle can be improved.
[0019] The spinning machine according to one aspect of the present
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disclosure may include a plurality of spinning units, each of the
spinning units may include the drafting device, the spinning device, and
the winding apparatus, and the periodic unevenness identifying device
may identify the periodic unevenness on each of the spinning units. In
5 this case, the quality of the fiber bundle in each of the spinning units can
be improved.
[0020] The spinning machine according to one aspect of the present
disclosure may further include a drawing device configured to draw out
the yarn from the spinning device, the drafting device may include at
10 least a back roller, a middle roller, and a front roller, and the periodic
unevenness identifying device may use, as the total drafting ratio, a
difference in circumferential speed between the back roller and the
drawing device, or a difference in circumferential speed between the
back roller and the front roller.
15 [0021] A textile processing system according to one aspect of the
present disclosure includes a upstream process machine configured to
produce a first fiber bundle, a downstream process machine configured
to produce a second fiber bundle by at least drafting the first fiber
bundle, a first acquisition device configured to acquire first information
20 concerning the upstream process machine, a thickness unevenness
detector configured to detect thickness unevenness information
concerning periodic unevenness of thickness in the second fiber bundle,
and a periodic unevenness identifying device configured to identify,
based on the first information, the thickness unevenness information,
25 and a total drafting ratio in the downstream process machine, periodic
unevenness occurring in the second fiber bundle due to the upstream
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process machine. According to this textile processing system, due to
the above-described reasons, the quality of the fiber bundle can be
improved.
[0022] A periodic unevenness detecting program that causes a computer,
5 in a textile processing system configured to produce a first fiber bundle
by an upstream process machine and to produce a second fiber bundle
by at least drafting the first fiber bundle by a downstream process
machine, to perform processing of acquiring first information
concerning the upstream process machine, processing of detecting
10 thickness unevenness information concerning periodic unevenness of
thickness in the second fiber bundle, and processing of identifying,
based on the first information, the thickness unevenness information,
and a total drafting ratio in the downstream process machine, periodic
unevenness occurring in the second fiber bundle due to the upstream
15 process machine. According to this periodic unevenness detecting
program, due to the above-described reasons, the quality of the fiber
bundle can be improved.
[0023] According to one aspect of the present disclosure, it is possible
to provide a periodic unevenness detecting method, a textile processing
20 system, a spinning machine, and a periodic unevenness detecting
program capable of improving the quality of a fiber bundle.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 is a block diagram illustrating a configuration of a textile
processing system according to one embodiment.
25 [0025] FIG. 2 is a front view of an air spinning machine.
[0026] FIG 3 is a graph illustrating an example of a frequency
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distribution and a reference distribution.
[0027] FIG. 4 is a diagram illustrating a periodic unevenness detecting
program in the embodiment.
[0028] FIG. 5 is a schematic diagram for explaining a modification.
5 DETAILED DESCRIPTION
[0029] The following describes one exemplary embodiment of the
present disclosure in detail while referring to the accompanying
drawings. In the following description, identical or equivalent
constituent elements are denoted by identical reference signs, and
10 redundant explanations are omitted.
[Textile Processing System]
[0030] As illustrated in FIG. 1, a textile processing system 100
according to one embodiment includes a plurality of carding machines
110, a plurality of drawing machines 130, and a plurality of air spinning
15 machines 150.
[0031] The carding machine 110 cards (combs) a lap produced by an
opening and blowing machine in an upstream process of a carding
process, and produces a fiber bundle. For example, the carding
machine 110 separates fibers by combing the lap of a sheet shape, and
20 removes dust, short fibers, or the like that are contained in the lap.
Thereafter, the carding machine 110 collects the fibers remained after
removing the dust and short fibers by arranging the fibers in parallel,
and produces a rope-like fiber bundle (carded slivers). The carding
machine 110 accommodates the produced fiber bundle into a can (for
25 example, a cylindrical container). The fiber bundle produced by the
carding machine 110 is, in a state of being accommodated in the can,
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transported to a subsequent process.
[0032] The drawing machine 130 draws the fiber bundle produced by
the carding machine 110. The drawing machine 130 includes a
drafting device 131. The drafting device 131 includes a plurality (for
5 example, three pairs) of roller pairs (first roller pairs) arranged side by
side along the traveling direction of the fiber bundle. Each roller pair
includes a drive roller and a driven roller. The drawing machine 130
drafts (draws) the fiber bundle by those roller pairs. For example, the
drawing machine 130 drafts six or eight fiber bundles together by
10 six-times or eight-times, and eliminates thickness unevenness in the
fiber bundles by straightening the fibers. The drawing machine 130
accommodates the drawn out fiber bundle (a first fiber bundle) into a
can. The fiber bundle drawn by the drawing machine 130 is, in a state
of being accommodated in the can, transported to a subsequent process.
15 [0033] The air spinning machine 150 performs spinning on the fiber
bundle drawn in the drawing machine 130 and produces yarn (a second
fiber bundle). The air spinning machine 150 produces yarn by drafting
and twisting the fiber bundle drawn in the drawing machine 130 and
forms a package by winding the yarn. The air spinning machine 150 is
20 an air-jet spinning machine or an open-end spinning machine, for
example. The air-jet spinning machine performs spinning on a fiber
bundle by a swirl airflow and produces yarn. The open-end spinning
machine separates fibers of a fiber bundle by a combing roller or an
airflow, and thereafter produces yarn by twisting the fibers while
25 collecting the fibers again.
[0034] In such a textile processing system 100, performed is a textile
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processing method including a carding process of producing a fiber
bundle by using the carding machine 110, a drawing process of drawing
the fiber bundle produced in the carding process by using the drawing
machine 130, and an air spinning process of producing yarn by spinning
5 the fiber bundle drawn in the drawing process by using the air spinning
machine 150.
[0035] In the textile processing system 100, the fiber bundle that is
produced in the carding machine 110 and supplied to the air spinning
machine 150 passes through the drawing machine 130 multiple times.
10 In the textile processing system 100, the fiber bundles produced by two
carding machines 110 are supplied to a single drawing machine 130 and
the fiber bundle drawn by the single drawing machine 130 is supplied to
two air spinning machines 150. The two carding machines 110, the
single drawing machine 130, and the two air spinning machines 150
15 constitute a unit of which a processing route of the fiber is the same in
the textile processing system 100.
[0036] The textile processing system 100 may include a sliver lap
machine that performs a sliver lap process and a comber that performs a
combing process. In this case, the textile processing method includes
20 the sliver lap process and the combing process. In the sliver lap
process, a sliver lap is produced by winding 18 to 24 rope-like fiber
bundles produced in the carding machine 110 as a single sheet. In the
combing process, by combing the sliver lap produced in the sliver lap
machine, removing dust and short fibers, and arranging long fibers
25 remaining after removal in parallel, an even (uniform) fiber bundle is
produced. In this case, the fiber bundle produced in the combing
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process is supplied to the drawing machine 130.
[0037] The textile processing system 100 may include, in place of the
air spinning machine 150, a roving frame that performs a roving process,
a ring spinning frame that performs a spinning process, and an
5 automatic winder that performs a rewinding process. In this case, the
textile processing method includes the roving process, the spinning
process, and the rewinding process, in place of the air spinning process.
In the roving process, roved yam is produced by drafting and twisting
the fiber bundle drawn in the drawing machine 130. In the spinning
10 process, yam is produced by drafting and twisting the roved yarn
produced in the roving frame. In the rewinding process, a package is
formed by winding the yam produced in the ring spinning frame.
[0038] The textile processing system 100 may be of a single-pass
configuration in which the fiber bundle passes through the drawing
15 machine 130 only once. In the textile processing system 100, the fiber
bundle produced by a single carding machine 110 may be supplied to a
single drawing machine 130 and the fiber bundle drawn in the single
drawing machine 130 may be supplied to a single air spinning machine
150. As just described, the processing route of the fibers by the
20 carding machine 110, the drawing machine 130, and the air spinning
machine 150 is not limited, and it only needs to be possible to identify
the drawing machine 130 that has lastly drawn the fiber bundle supplied
to the air spinning machine 150. The carding machine 110 may
include a drafting device. The drafting device is provided on the
25 downstream side of the carding machine 110 and drafts the produced
fiber bundle, for example. The drafting device separates the fiber
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bundle and improves the parallelism of the fiber bundle. In this case,
the cardmg machine 110 accommodates into a can the fiber bundle that
has been drafted by the drafting device.
[Air spinning machine]
5 [0039] With reference to FIG. 2, the configuration of the air spinning
machine 150 will be further described. As illustrated in FIG. 2, the air
spinning machine 150 includes a plurality of spinning units 2, a yarn
joining carrier 3, a doffing carrier (depiction omitted), a first end frame
4, a second end frame 5, and a plurality of unit controllers (periodic
10 unevenness identifying devices) 10.
[0040] The spinning units 2 are arrayed in a row. Each spinning unit 2
produces yarn Y and winds the yarn Y into a package P. When the
yarn Y is cut or the yarn Y is broken for some reason, the yarn joining
carrier 3 performs a yarn joining operation on the relevant spinning unit
15 2. When the package P is fully wound in a spinning unit 2, the doffing
carrier doffs the relevant package P and supplies a new bobbin B to the
relevant spinning unit 2.
[0041] The first end frame 4 accommodates a collecting apparatus,
which collects fiber waste and yarn waste, etc. that generate in the
20 spinning units 2, and the like. The second end frame 5 accommodates
an air supplier that adjusts an air pressure of compressed air supplied to
the air spinning machine 150 and supplies the air to various sections of
the air spinning machine 150, drive motors for supplying power to
various components of the spinning units 2, and the like.
25 [0042] The second end frame 5 is provided with a machine control
device (a first acquisition device, a second acquisition device) 5a, and a
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touch panel screen 5b. The machine control device 5a centrally
manages and controls the various sections of the air spinning machine
150. The touch panel screen 5b can display information concerning at
least one of the setting content of and the state of the spinning units 2.
5 An operator can, perform a setting work of the spinning units 2 by
performing operating input by using buttons 5c displayed on the touch
panel screen 5b.
[0043] The unit controller 10 is provided for each certain number of the
spinning units 2. The unit controller 10 controls the operation of the
10 spinning units 2. The unit controller 10 is a computer including a
processor (for example, a central processing unit (CPU)) that executes
an operating system, application programs, and the like, a storage
section composed of a read only memory (ROM), a random-access
memory (RAM), a hard disk, or the like, and a communication
15 controller composed of a network card or a wireless communications
module, for example. The storage section of the unit controller 10
stores data or a database necessary for processing. The unit controller
10 is communicatively coupled to the machine control device 5 a and
controls the operation of various sections of the spinning units 2 based
20 on operating conditions input to the machine control device 5 a.
[0044] Each spinning unit 2 includes, in order from the upstream side in
a traveling direction of the yarn Y, a drafting device 6, a spinning device
7, a yarn monitoring device (a thickness unevenness detector, a periodic
unevenness detector) 8, a tension sensor 9, a yarn storage device (a
25 drawing device) 11, a waxing device 12, and a winding apparatus 13.
[0045] The drafting device 6 drafts a fiber bundle (a sliver, a first fiber
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bundle) S produced by the drawing machine 130. The drafting device
6 includes, in order from the upstream side in the traveling direction of
the fiber bundle S, a back roller (a drafting roller), a third roller (a
drafting roller), a middle roller (a drafting roller), and a front roller (a
5 drafting roller), and drafts the fiber bundle S by these rollers. That is,
the drafting device 6 includes a plurality of roller pairs (second roller
pairs) and drafts the fiber bundle S by those roller pairs. The number
of roller pairs (second roller pairs) provided in the drafting device 6 may
be three or five. The drafting device 6 drafts the fiber bundle S at a
10 drafting ratio higher than the drafting ratio in the drawing machine 130.
[0046] The spinning device 7 twists, by a swirl airflow, the fiber bundle
S drafted in the drafting device 6 and produces the yarn Y.
[0047] The yarn storage device 11 draws (pulls) the yarn Y from the
spinning device 7. The yarn storage device 11 removes a slack of the
15 yarn Y between the spinning device 7 and the winding apparatus 13.
[0048] The waxing device 12 applies wax to the yarn Y between the
yarn storage device 11 and the winding apparatus 13. The waxing
device 12 may be omitted. In the case of not applying wax to the yarn
Y, the wax may be removed from the waxing device 12 without
20 omitting the waxing device 12.
[0049] The winding apparatus 13 winds the yarn Y onto a bobbin B and
forms the package P.
[0050] The yarn monitoring device 8 monitors a state of the travelling
yarn Y between the spinning device 7 and the yarn storage device 11.
25 The yarn monitoring device 8 detects thickness unevenness information
(periodic unevenness information) concerning periodic unevenness of
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thickness of the yarn Y. The thickness unevenness information is the
information indicating temporal changes in the thickness of the yarn Y,
for example. The yam monitoring device 8 may include a sensor of
any type. For example, an optical sensor that irradiates the yarn Y with
5 light and detects temporal changes in the thickness of the yarn Y based
on the changes in the amount of receiving light may be used, or a
capacitance sensor that causes the yam Y to pass through an electric
field and detects the temporal changes in the thickness of the yarn Y
based on the changes in capacitance may be used.
10 [0051] The yam monitoring device 8 detects a presence or an absence
of a yam defect based on a monitoring result. The yarn monitoring
device 8 detects, as a yam defect, at least one of thickness abnormality
of the yarn Y and a foreign object that is contained in the yarn Y, for
example.
15 [0052] The yam monitoring device 8 detects a presence or an absence
of the yarn Y in a yam path of the yam Y The yam monitoring device
8 transmits a signal indicating a detection result to the unit controller 10.
[0053] The tension sensor 9 measures the tension of the travelling yam
Y between the spinning device 7 and the yam storage device 11, and
20 transmits a tension measurement signal to the unit controller 10. The
tension sensor 9 may be omitted.
[0054] When the unit controller 10 determines a presence of
abnormality based on at least one of the detection result of the yarn
monitoring device 8 and the detection result of the tension sensor 9, the
25 yarn Y is cut in the spinning unit 2.
[Periodic Unevenness Detecting Method]
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[0055] Next, a periodic unevenness detecting method executed in the
textile processing system 100 will be described. As in the foregoing,
in the textile processing system 100, by drafting and twisting the fiber
bundle S (a first fiber bundle) produced by the drawing machine 130 by
5 the air spinning machine 150, the yarn Y (a second fiber bundle) is
produced. That is, the textile processing system 100 includes the
drawing machine 130 as an upstream (preceding) process machine, and
the air spinning machine 150 as a downstream (post) process machine.
[0056] Schematically, in this periodic unevenness detecting method,
10 first information on the drawing machine 130 is acquired (a first
acquisition step). By the air spinning machine 150, thickness
unevenness information on the yarn Y is detected (a thickness
unevenness detecting step). Based on the first information, the
thickness unevenness information, and a total drafting ratio in the air
15 spinning machine 150, periodic unevenness occurring in the yarn Y due
to (caused by) the drawing machine 130 is detected (identified) (a
periodic unevenness detecting step, a periodic unevenness identifying
step).
[0057] Such periodic unevenness may be caused due to the mechanical
20 configuration of the drawing machine 130, or may be caused due to a
defect such as a scratch formed on a component or eccentricity of a
component in the drawing machine 130, for example. When the
periodic unevenness due to the drawing machine 130 is detected, the
occurrence of the relevant periodic unevenness may be reduced by
25 changing a drafting condition (an operating condition) of the drawing
machine 130 or by eliminating the defect that has occurred in the
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drawing machine 130, for example.
[0058] Furthermore, in the present embodiment, second information on
the air spinning machine 150 is acquired (a second acquisition step).
By using the second information in addition to the first information, the
5 periodic unevenness due to the drawing machine 130 can be detected in
distinction from the periodic unevenness due to the air spinning
machine 150. As a result, the periodic unevenness due to the drawing
machine 130 can be detected more accurately.
[0059] The periodic unevenness detecting method in the present
10 embodiment includes the first acquisition step, the second acquisition
step, the thickness unevenness detecting step, the periodic unevenness
detecting step, a first output step, and a second output step. In the
following description, although a description is made focusing on one
spinning unit 2 out of the air spinning machine 150, the periodic
15 unevenness detecting method is performed on the other spinning units 2
also in the same manner.
[0060] In the first acquisition step, the machine control device 5a
acquires the first information on the drawing machine 130. For
example, the machine control device 5 a acquires the first information by
20 receiving information on operating input for which the operator
performed on the touch panel screen 5b. The first information is the
information concerning an unevenness factor that can cause unevenness
of a short wavelength (a high frequency) in the fiber bundle S produced
by the drawing machine 130. That is, the first information is the
25 information concerning the unevenness factor that can cause periodic
unevenness in the yarn Y produced by the spinning unit 2. The first
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information includes the information concerning at least one of the
mechanical configuration, the drafting condition, or the like of the
drawing machine 130, for example.
[0061] The first information includes at least one of the diameter of a
5 drive roller, the number of teeth of a pulley of the drive roller, the pitch
of grooves (a distance between protruding portions forming the
grooves) formed on the drive roller, the number of teeth of a drive gear
of the drive roller, and a contact pressure between the drive roller and a
driven roller, for example. In other words, the first information may
10 not include any of the foregoing information. Although the
above-described drive roller is, out of the roller pairs provided in the
drafting device 131, the drive roller (a front bottom roller) of the roller
pair arranged on the most downstream side in the traveling direction of
the fiber bundle, it may be a drive roller of other roller pairs, for
15 example. The first information may include the diameter of a can that
accommodates the fiber bundle produced by the drawing machine 130.
This is because the unevenness due to the can accommodation may
occur in the fiber bundle.
[0062] In the second acquisition step, the machine control device 5a
20 acquires the second information on the spinning unit 2. For example,
the machine control device 5 a acquires the second information by
receiving information on operating input for which the operator
performed on the touch panel screen 5b. The second information is the
information concerning the unevenness factor that can cause the
25 periodic unevenness in the yarn Y, and includes the information
concerning at least one of the mechanical configuration, the drafting
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condition, or the like of the spinning unit 2, for example. More
specifically, the information concerning the mechanical configuration of
the spinning unit 2 is the diameter of a drafting roller, the number of
teeth of a pulley of the bottom roller, a groove pitch of the bottom roller,
5 and the number of steps of a drive motor for the bottom roller, for
example. The information concerning the drafting condition is a
drafting ratio (a total drafting ratio and the like), a drafting speed, a
drafting gauge (a distance between the drafting roller pairs), for
example. The second acquisition step may be performed before or
10 after the first acquisition step, or may be performed simultaneously with
the first acquisition step. The total drafting ratio is a difference in
circumferential speed between the back roller of the drafting device 6
and the yarn storage device 11 (specifically, a yarn storage roller of the
yarn storage device 11), or a difference in the circumferential speed
15 between the back roller and the front roller in the drafting device 6, for
example.
[0063] In the thickness unevenness detecting step, the yarn monitoring
device 8 detects the thickness unevenness information on the yarn Y.
In the periodic unevenness detecting step, the unit controller 10 detects
20 (identifies) the periodic unevenness due to the drawing machine 130.
[0064] With reference to FIG. 3, the periodic unevenness detecting step
will be further described. In the periodic unevenness detecting step, by
using a frequency distribution 21 about the periodic unevenness of
thickness in the yarn Y, the periodic unevenness due to the drawing
25 machine 130 is detected. The frequency distribution 21 is calculated
based on the thickness unevenness information on the yarn Y detected
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by the yarn monitoring device 8. The frequency distribution 21 is
compared with a reference distribution 22. The reference distribution
22 is an ideal distribution corresponding to the frequency distribution
originally intended to be obtained. The frequency distribution 21 and
5 the reference distribution 22 are distribution (spectrogram) represented
on a graph for which the abscissa axis is frequency and the ordinate axis
is intensity (the number of counts), for example.
[0065] The reference distribution 22 can be calculated based on the
fineness (a thickness of fibers constituting the fiber bundle S), an
10 average thickness (an average thickness of the fiber bundle S itself), and
a rate of fiber lengths (a rate of respective fiber lengths of fibers
contained in the fiber bundle S) of the fiber bundle S supplied to the
spinning unit 2, for example. Each of the fineness, the average
thickness, and the rate of fiber lengths of the fiber bundle S is measured
15 by a predetermined measuring instrument and is input to the machine
control device 5a by the operating input of the operator via the touch
panel screen 5b, for example. The reference distribution 22 may be
calculated based on the drafting condition (for example, a drafting ratio)
of the spinning unit 2 further. In FIG. 3, although the distribution is
20 represented by a curve, the distribution may be represented as a bar
graph.
[0066] As illustrated in FIG. 3, certain unevenness (drafting
unevenness) is also included in the reference distribution 22 that is an
ideal distribution. In the practical frequency distribution 21, a peak
25 such as a peak 23 may appear. Such a peak 23 can be caused by the
drawing machine 130 or the spinning unit 2. When the peak 23
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appears, the unit controller 10 determines, based on the first information
and the second information, whether the peak 23 is the periodic
unevenness caused by the drawing machine 130 or the periodic
unevenness caused by the spinning unit 2.
5 [0067] For example, the unit controller 10 sets, based on the first
information acquired at the first acquisition step and the second
information acquired at the second acquisition step, a first frequency
peak associated with the first information and a second frequency peak
associated with the second information. The first frequency peak may
10 be one or more. The second frequency peak may be one or more.
The unit controller 10 determines that, when the peak 23 corresponds to
at least one of the first frequency peaks, the peak 23 is the periodic
unevenness caused by the drawing machine 130. The unit controller
10 determines that, when the peak 23 corresponds to at least one of the
15 second frequency peaks, the peak 23 is the periodic unevenness caused
by the spinning unit 2. By such processing, the periodic unevenness
due to the drawing machine 130 can be detected in distinction from the
periodic unevenness due to the spinning unit 2.
[0068] Furthermore, in the periodic unevenness detecting step, a cause
20 of the periodic unevenness due to the drawing machine 130 may be
predicted. The value of the peak 23 detected by the air spinning
machine 150 differs depending on each mechanical configuration, the
drafting condition, and the like of the drawing machine 130. For
example, the unit controller 10 sets, based on the first information
25 acquired at the first acquisition step, frequency peaks that differ
depending on each piece of the first information (the diameter of the
22
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drive roller, the number of teeth of the pulley of the drive roller, and the
like), and determines which frequency peak the peak 23 corresponds to.
Accordingly, the specific cause of the periodic unevenness due to the
drawing machine 130 can be predicted.
5 [0069] In the first output step, the frequency distribution 21 and the
reference distribution 22 are output to a display screen. For example,
the unit controller 10 controls the touch panel screen 5b so as to display
the frequency distribution 21 and the reference distribution 22. That is,
in this case, the first output step is executed by the touch panel screen 5b
10 as a first output unit. In the first output step, the peak 23 that appears
in the frequency distribution 21 is displayed in a form different from the
portions other than the peak 23 in the frequency distribution 21. For
example, the peak 23 and the portions other than the peak 23 are
displayed such that the color, the type, or the thickness of the bar is
15 different from each other. As a result, the operator who visually
confirmed the touch panel screen 5b can easily find the peak 23 that
appears in the frequency distribution 21.
[0070] In the second output step, when the periodic unevenness due to
the drawing machine 130 has been detected at the periodic unevenness
20 detecting step, information for eliminating the relevant periodic
unevenness is output. For example, the unit controller 10 controls the
touch panel screen 5b so as to display the information for eliminating
the relevant periodic unevenness. That is, in this case, the second
output step is executed by the touch panel screen 5b as a second output
25 unit. The information output may be the display indicating the cause
(a place of occurrence) of the periodic unevenness, or may be a method,
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advice, or the like for eliminating the detected periodic unevenness, for
example.
[0071] The following describes two specific examples concerning the
periodic unevenness detection. As a first example, there may be a case
5 where the fiber bundle S supplied to the spinning unit 2 includes
unevenness (latent unevenness) of about 2 mm due to the pitch of the
grooves formed on the front roller of the drafting device 131 of the
drawing machine 130. Such unevenness can be detected by the yarn
monitoring device 8 because it appears in the yarn Y as the periodic
10 unevenness of 400 mm when drafting under a total drafting ratio of 200
is performed by the spinning unit 2, for example. With the periodic
unevenness detecting method of the present embodiment, such periodic
unevenness can be detected. In this case, in the second output step, the
display for urging change of the drafting condition of the drawing
15 machine 130 is output to the touch panel screen 5b, for example.
[0072] As a second example, there may be a case where the fiber
bundle S supplied to the spinning unit 2 includes unevenness due to a
scratch formed on, or to the eccentricity of the front roller of the
drafting device 131 of the drawing machine 130. Such unevenness can
20 be detected by the yarn monitoring device 8 because it appears in the
yarn Y as the periodic unevenness when drafting is performed by the
spinning unit 2. With the periodic unevenness detecting method of the
present embodiment, such periodic unevenness can be detected. In this
case, in the second output step, the display for urging repair of the
25 scratch of or the eccentricity of the front roller is output to the touch
panel screen 5b, for example.
24
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[Periodic Unevenness Detecting Program]
[0073] As illustrated in FIG. 4, a storage section 10a of the unit
controller 10 stores a periodic unevenness detecting program C. The
storage section 10a is a non-transitory computer-reading storage
5 medium storing therein the periodic unevenness detecting program C.
The unit controller 10 implements the periodic unevenness detecting
method by making the processor load and execute the periodic
unevenness detecting program C. The periodic unevenness detecting
program C includes a first acquisition module CI, a second acquisition
10 module C2, a thickness unevenness detecting module C3, a periodic
unevenness detecting module C4, a first output module C5, and a
second output module C6. The processing implemented by executing
the first acquisition module CI, the second acquisition module C2, the
thickness unevenness detecting module C3, the periodic unevenness
15 detecting module C4, the first output module C5, and the second output
module C6 is the same as the processing of the above-described first
acquisition step, the second acquisition step, the thickness unevenness
detecting step, the periodic unevenness detecting step, the first output
step, and the second output step, respectively. The periodic
20 unevenness detecting program C may be provided by being permanently
recorded on a tangible recording medium such as a CD-ROM, a
DVD-ROM, and a semiconductor memory, for example. Alternatively,
the periodic unevenness detecting program C may be provided via a
communication network as a data signal.
25 [Function and Effect]
[0074] As in the foregoing, in the periodic unevenness detecting
25
FP19-0122-00IN-MRT
method of the present embodiment, the periodic unevenness that occurs
in the yarn Y due to the drawing machine 130 is detected, based on the
first information concerning the drawing machine 130 that produces the
fiber bundle S and the thickness unevenness information on the yarn Y
5 produced by the spinning unit 2. Accordingly, when the periodic
unevenness due to the drawing machine 130 is detected, the occurrence
of the relevant periodic unevenness can be avoided by changing the
operating condition of the drawing machine 130 or by eliminating the
defect that has occurred in the drawing machine 130, for example.
10 Thus, according to the periodic unevenness detecting method of the
present embodiment, the quality of the fiber bundle (the fiber bundle S
and the yarn Y) can be improved.
[0075] Furthermore, according to this periodic unevenness detecting
method, by monitoring the yarn Y produced in each spinning unit 2 at
15 all times, the periodic unevenness that occurs in the yarn Y due to the
drawing machine 130 can be detected. That is, when a general
measuring instrument is used, only a part of the fiber bundle S before
being drafted by the air spinning machine 150 can be measured, but in
the periodic unevenness detecting method of the present embodiment,
20 the detection can be performed on the entire fiber bundle S drafted by
the air spinning machine 150.
[0076] In the periodic unevenness detecting step, by using, as the
thickness unevenness information, the frequency distribution 21 about
the periodic unevenness of thickness of the yarn Y, the periodic
25 unevenness due to the drawing machine 130 is detected. Accordingly,
because the interval of the periodic unevenness included in the fiber
26
FP19-0122-001N-MRT
bundle S is increased as the fiber bundle S is drafted by the spinning
unit 2, the periodic unevenness due to the drawing machine 130 can be
detected more suitably.
[0077] In the periodic unevenness detecting step, provided that the
5 reference distribution 22 is a distribution calculated based on the
fineness, the average thickness, and the rate of fiber lengths of the fiber
bundle S, and the total drafting ratio, the periodic unevenness due to the
drawing machine 130 is detected based on a comparison result of the
reference distribution 22 and the frequency distribution 21.
10 Accordingly, by referring to the reference distribution 22 also, the
periodic unevenness due to the drawing machine 130 can be detected
further accurately.
[0078] In the periodic unevenness detecting step, by determining
whether a peak corresponding to the periodic unevenness has appeared
15 in the frequency distribution 21, the periodic unevenness is detected.
As a result, the periodic unevenness due to the drawing machine 130
can be detected more accurately.
[0079] In the first output step, the peak 23 that appears in the frequency
distribution 21 is displayed in a form different from the portions other
20 than the peak 23 in the frequency distribution 21. As a result, the
operator who visually confirmed the display screen can find with ease
the peak 23 that appears in the frequency distribution 21.
[0080] In the periodic unevenness detecting step, based on the first
information and the thickness unevenness information, the cause of the
25 periodic unevenness due to the drawing machine 130 is predicted
(estimated). Accordingly, the cause of the periodic unevenness that is
27
FP19-0122-00IN-MRT
due to the drawing machine 130 can be learnt. Such a periodic
unevenness detecting method is advantageous in that an operator can
learn the cause of the periodic unevenness that is due to the drawing
machine 130, even without in-depth knowledge concerning the drawing
5 machine 130, the periodic unevenness due to the drawing machine 130,
and the like (even when the operator is not an adept).
[0081] In the periodic unevenness detecting step, based further on the
second information, the periodic unevenness due to the drawing
machine 130 is detected. Accordingly, because the periodic
10 unevenness due to the drawing machine 130 and the periodic
unevenness due to the air spinning machine 150 can be distinguished,
the periodic unevenness due to the drawing machine 130 can be
detected further accurately.
[0082] The spinning unit 2 drafts the fiber bundle S at a drafting ratio
15 higher than the drafting ratio in the drawing machine 130.
Accordingly, because the periodic unevenness due to the drawing
machine 130 easily appears, the periodic unevenness due to the drawing
machine 130 can be detected further suitably.
[0083] The spinning unit 2 includes the drafting device 6 configured to
20 draft the fiber bundle S, the spinning device 7 configured to twist the
fiber bundle S drafted by the drafting device 6 and to produce the yarn Y,
and the winding apparatus 13 configured to wind the yarn Y and to form
the package P. In such a spinning unit 2, because the total length of the
yarn Y wound into the package P is long and also the drafting ratio is
25 higher than that of the drawing machine 130, the periodic unevenness
due to the drawing machine 130 can be detected further suitably.
28
FP19-0122-00IN-MRT
[0084] The first information includes at least one of the diameter of a
drive roller, the number of teeth of the pulley of the drive roller, the
pitch of the grooves formed on the drive roller, the number of teeth of
the drive gear of the drive roller, the contact pressure between the drive
5 roller and the driven roller, and the diameter of a can in which the fiber
bundle produced by the drawing machine 130 is accommodated, for
example. Accordingly, because the period at which the periodic
unevenness may occur can be predicted, the periodic unevenness due to
the drawing machine 130 can be detected further suitably.
10 [0^85] The periodic unevenness detecting method of the present
embodiment includes the second output step in which, when the
periodic unevenness due to the drawing machine 130 is detected at the
periodic unevenness detecting step, the information for eliminating the
relevant periodic unevenness is output. Accordingly, when the
15 periodic unevenness due to the drawing machine 130 is detected, the
measures to avoid the occurrence of the relevant periodic unevenness
can be urged.
[0086] In the first acquisition step, the first information is acquired by
the operating input of the operator.
20 [0087] The spinning unit 2 includes a plurality of roller pairs (second
roller pairs) and drafts the fiber bundle S by those roller pairs.
Accordingly, because the fiber bundle S is stretched without the
constituting fibers being separated, the periodic unevenness due to the
drawing machine 130 can be detected reliably.
25 [0088] As in the foregoing, one embodiment of the present disclosure
has been described, but the present disclosure is not limited to the
29
FP19-0122-00IN-MRT
above-described embodiment. For example, the material and the shape
of each constituent element are not limited to the above-described
material and the shape, and various materials and shapes may be
employed.
5 [0089] In the first acquisition step of the above-described embodiment,
the machine control device 5 a has acquired the first information by
receiving the operating input, but in lieu of or in addition to the
operating input, the first information may be acquired by wireless
communication or wired communication. For example, the first
10 information may be acquired from the drawing machine 130 by the
wireless communication. In this case, a wireless communication
section that performs wireless communication functions as the first
acquisition device that executes the first acquisition step. In the
second acquisition step, in of or in addition to the operating input, the
15 second information may be acquired by wireless communication or
wired communication. In place of the touch panel screen 5b, a
keyboard, push buttons, or the like may be used.
[0090] In the first acquisition step of the above-described embodiment,
as illustrated in FIG. 5, the first information may be acquired by reading,
20 by a reading device 33, the information stored in an information tag 32
provided on a can 31 in which the fiber bundle S is accommodated.
The reading device 33 may be provided for each spinning unit 2, or one
reading device 33 may be provided for the air spinning machine 150.
Writing the information into the information tag 32 is performed by the
25 drawing machine 130, for example.
[0091] In the periodic unevenness detecting step of the above-described
30
FP19-0122-00IN-MRT
embodiment, the reference distribution 22 has been calculated by the
unit controller 10, but when the distribution corresponding to the
reference distribution 22 is calculated by the drawing machine 130, the
relevant distribution received from the drawing machine 130 may be
5 used in lieu of the reference distribution 22. Although the absolute
values of the distribution are different between the spectrogram of the
drawing machine 130 and the spectrogram of the air spinning machine
150, the relative values are the same, and thus the distribution received
from the drawing machine 130 may be used in lieu of the reference
10 distribution 22.
[0092] In the periodic unevermess detecting step of the above-described
embodiment, in lieu of the frequency distribution 21, by using a
wavelength distribution of the thickness unevenness of the yarn Y, the
periodic unevenness due to the drawing machine 130 may be detected.
15 In this case, the wavelength distribution and the reference distribution
are the distributions represented on a graph for which the abscissa axis
is wavelength and the ordinate axis is intensity, for example.
[0093] The periodic unevenness detecting step of the above-described
embodiment may be executed by the machine control device 5 a.
20 Alternatively, the periodic unevenness detecting step may be executed
by a computer provided separately from the drawing machine 130 and
the air spinning machine 150, and may be executed by a central
management computer of a textile mill, for example.
[0094] In the periodic unevenness detecting step of the
25 above-described embodiment, the periodic unevenness due to the
drawing machine 130 has been detected based on both the first
31
FP19-0122-00IN-MRT
information and the second information, but the second information
does not necessarily need to be used.
[0095] In the first output step of the above-described embodiment, the
frequency distribution 21 and the reference distribution 22 have been
5 displayed on the touch panel screen 5b, but the frequency distribution
21 and the reference distribution 22 may be displayed on a display
device that the drawing machine 130 has or a portable display device
(including a tablet or a smartphone). In the second output step of the
above-described embodiment, the information for eliminating the
10 periodic unevenness has been displayed on the touch panel screen 5b,
but the relevant information may be displayed on a display device that
the drawing machine 130 has or a portable display device (including a
tablet or a smartphone). Alternatively, paper on which the relevant
information is described may be printed. The frequency distribution
15 21 and the reference distribution 22, and the information for eliminating
the periodic unevenness may be displayed together on a single display
device or may be displayed on two different display devices separately.
[0096] In the above-described embodiment, when the periodic
unevenness due to the drawing machine 130 is detected at the periodic
20 unevenness detecting step, the second output step may display
information that urges returning, to the opening and blowing machine,
the fiber bundles S (cans) that have been produced up to the relevant
detection from the time point of start of production of the fiber bundles
S. Alternatively, when the periodic unevenness due to the drawing
25 machine 130 is detected at the periodic unevenness detecting step, the
cans accommodating the fiber bundles S that have been produced up to
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the relevant detection from the time point of start of production of the
fiber bundles S may be automatically transferred to the drawing
machine 130. The fiber bundle S has no choice but to be discarded if it
is processed once into the yarn Y (the package P), but if in a state of the
5 fiber bundle S, the fiber bundle S can be reused by returning it to the
opening and blowing machine.
[0097] In the above-described embodiment, a description has been
made on an example in which the upstream process machine is the
drawing machme 130 and the downstream process machine is the air
10 spinning machine 150, but the combination of the upstream process
machine and the downstream process machine is not limited thereto.
For example, a combination may be the drawing machine 130 (an
upstream process machine) and a roving frame (a downstream process
machine). In this case, the first fiber bundle is a drawing sliver and the
15 second fiber bundle is roved yarn. Alternatively, a combination may
be a roving frame (an upstream process machine) and a ring spinning
frame (a downstream process machine). In this case, the first fiber
bundle is roved yarn and the second fiber bundle is yarn. That is, the
downstream process machine only needs to be a textile machine that
20 produces the second fiber bundle by at least drafting the first fiber
bundle that is produced by the upstream process machine and it does not
necessarily need to be a textile machine that twists the fiber bundle.
[0098] In the above-described embodiment, it can be assumed that the
air spinning machine 150 as a downstream process machine executes
25 the periodic unevenness detecting method. The air spinning machine
150 includes the spinning unit 2 including the drafting device 6
33
FP19-0122-00IN-MRT
configured to draft the fiber bundle S, the spinning device 7 configured
to twist the drafted fiber bundle S and to produce the yam Y, and the
winding apparatus 13 configured to wind the yarn Y and to form the
package P; the thickness unevenness detector (the yam monitoring
5 device 8) configured to detect the thickness unevenness information
concerning periodic unevenness of thickness in the yam Y; the first
acquisition device (the machine control device 5 a) configured to acquire
the first information concerning the upstream process machine (the
drawing machine 130) configured to produce the fiber bundle S; and the
10 periodic unevenness identifying device (the unit controller 10)
configured to detect the periodic unevenness occurring in the yarn Y due
to the upstream process machine based on the first information and the
thickness unevenness information. The air spinning machine 150
includes a plurality of spinning units 2, and the periodic unevenness
15 identifying device identifies, on each of the spinning units 2, the
periodic unevenness occurring in the yam Y due to the upstream process
machine.
[0099] In the spinning unit 2 of the above-described embodiment, in the
direction of machine height (vertical direction), the various devices have
20 been arranged such that the yarn Y supplied on the upper side is wound
on the lower side. However, the various devices may be arranged such
that the yarn Y supplied on the lower side is wound on the upper side.
[0100] The spinning unit 2 may draw out the yarn Y from the spinning
device 7 by not the yarn storage device 11 but a delivery roller pair (a
25 drawing device). In this case, the total drafting ratio may be the
difference in the circumferential speed between the back roller of the
34
FP19-0122-00IN-MRT
drafting device 6 and the delivery roller pair.
[0101] The drafting device 6 only needs to include at least the back
roller, the middle roller, and the front roller, and may include an
additional pair of back rollers, for example.
5 [0102] The present disclosure may be modified without altering the
scope described in each of the claims. The above-described
embodiment and the above-described modifications may be combined
as appropriate. At least a part of the above-described embodiment and
of the above-described modifications may be combined in any desired manner.

We claim:
1. A periodic unevenness detecting method executed in a textile
processing system (100) in which a first fiber bundle (S) that is
produced by an upstream process machine (130) is at least drafted by a
5 downstream process machine (150) to produce a second fiber bundle
(Y), the periodic unevenness detecting method comprising:
a first acquisition step of acquiring first information concerning
the upstream process machine (130);
a thickness unevenness detecting step of detecting thickness
10 unevenness information concerning periodic unevenness of thickness in
the second fiber bundle (Y); and
a periodic unevenness identifying step of identifying, based on
the first information, the thickness unevenness information, and a total
drafting ratio in the downstream process machine (150), periodic
15 unevenness occurring in the second fiber bundle (Y) due to the
upstream process machine (130).
2. The periodic unevenness detecting method according to claim 1,
wherein, in the periodic unevenness identifying step, the periodic
20 unevenness is identified by using, as the thickness unevenness
information, a frequency distribution (21) of or a wavelength
distribution of periodic unevenness of thickness in the second fiber
bundle (Y).
25 3. The periodic unevenness detecting method according to claim 2,
wherein, provided that a reference distribution (22) is a distribution
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FP19-0122-00IN-MRT
calculated based on fineness, an average thickness, and a rate of fiber
lengths of the first fiber bundle (S), and the total draft ratio, in the
periodic unevenness identifying step, the periodic unevenness is
identified based on a comparison result of the reference distribution (22)
5 with the frequency distribution (21), or based on a comparison result of
the reference distribution (22) with the wavelength distribution.
4. The periodic unevenness detecting method according to claim 2
or 3, wherein, in the periodic unevenness identifying step, the periodic
10 unevenness is identified by determining whether a peak (23)
corresponding to the periodic unevenness has appeared in the frequency
distribution (21) or the wavelength distribution.
5. The periodic unevenness detecting method according to any one
15 of claims 2 to 4, further comprising:
a first output step of outputting the frequency distribution (21) or
the wavelength distribution to a display screen (5b), wherein
in the first output step, a peak (23) that appears in the frequency
distribution (21) is displayed in a display form different from a display
20 form of portions other than the peak (23) in the frequency distribution
(21), or a peak that appears in the wavelength distribution is displayed
in a display form different from a display form of portions other than the
peak in the wavelength distribution.
25 6. The periodic unevenness detecting method according to any one
of claims 1 to 5, wherein, in the periodic unevenness identifying step, a
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FP19-0122-00IN-MRT
cause of the periodic unevenness is predicted based on the first
information and the thickness unevenness information.
7. The periodic unevenness detecting method according to any one
5 of claims 1 to 6, further comprising:
a second acquisition step of acquiring second information
concerning the downstream process machine (150), wherein
in the periodic unevenness identifying step, the periodic
unevenness is identified based on the second information further.
10
8. The periodic unevenness detecting method according to any one
of claims 1 to 7, wherein
the upstream process machine (130) is configured to produce the
first fiber bundle (S) by drafting a fiber bundle, and
15 the downstream process machine (150) is configured to draft the
first fiber bundle (S) at a drafting ratio higher than a drafting ratio in the
upstream process machine (130).
9. The periodic unevenness detecting method according to any one
20 of claims 1 to 8, wherein the downstream process machine (150)
includes a drafting device (6) configured to draft the first fiber bundle
(S), a spinning device (7) configured to twist the first fiber bundle (S)
drafted by the drafting device (6) and to produce yarn (Y) as the second
fiber bundle (Y), and a winding apparatus (13) configured to wind the
25 yarn (Y) and to form a package (P).
38
FP19-0122-00IN-MRT
10. The periodic unevenness detecting method according to any one
of claims 1 to 9, wherein
the upstream process machine (130) includes a plurality of first
roller pairs each having a drive roller and a driven roller, and is
5 configured to produce the first fiber bundle (S) by drafting, by the first
roller pairs, a fiber bundle that is supplied to the upstream process
machine (130), and
the first information includes at least one of a diameter of the
drive roller, number of teeth of a pulley of the drive roller, a pitch of
10 grooves formed on the drive roller, number of teeth of a drive gear of
the drive roller, a contact pressure between the drive roller and the
driven roller, and a diameter of a can (31) in which a fiber bundle
produced by the upstream process machine (130) is accommodated.
15 11. The periodic unevenness detecting method according to any one
of claims 1 to 10, farther comprising a second output step of outputting
information for eliminating the periodic unevenness, when the periodic
unevenness is identified at the periodic unevenness identifying step.
20 12. The periodic unevenness detecting method according to any one
of claims 1 to 10, wherein, in the first acquisition step, the first
information is acquired by at least one of operating input and
communication.
25 13. The periodic unevenness detecting method according to any one
of claims 1 to 10, wherein, in the first acquisition step, the first
39
FP19-0122-00IN-MRT
information is acquired by reading, by a reading device (33),
information on an information tag (32) provided to a can (31) in which
the first fiber bundle (S) is accommodated.
5 14. The periodic unevenness detecting method according to any one
of claims 1 to 13, wherein the downstream process machine (150)
includes a plurality of second roller pairs and is configured to draft the
first fiber bundle (S) by the second roller pairs.
10 15. A spinning machine (150) configured to execute the periodic
unevenness detecting method according to any one of claims 1 to 14 as
the downstream process machine (150), the spinning machine (150)
comprising:
a drafting device (6) configured to draft the first fiber bundle
15 (S);
a spinning device (7) configured to twist the drafted first fiber
bundle (S) and to produce yarn (Y) as the second fiber bundle (Y);
a winding apparatus (13) configured to wind the yarn (Y) and to
form a package (P);
20 a first acquisition device (5a) configured to acquire the first
information;
a thickness unevenness detector (8) configured to detect the
thickness unevenness information; and
a periodic unevenness identifying device (10) configured to
25 identify, based on the first information, the thickness unevenness
information, and the total drafting ratio, periodic unevenness occurring
40
FP19-0122-00IN-MRT
in the yarn (Y) due to the upstream process machine (130).
16. The spinning machine (150) according to claim 15, further
comprising:
5 a plurality of spinning units (2), wherein
each of the spinning units (2) includes the drafting device (6),
the spinning device (7), and the winding apparatus (13), and
the periodic unevenness identifying device (10) is configured to
identify the periodic unevenness on each of the spinning units (2).
10
17. The spinning machine (150) according to claim 15 or 16, further
comprising:
a drawing device (11) configured to draw out the yarn (Y) from
the spinning device (7), wherein
15 the drafting device (6) includes at least a back roller, a middle
roller, and a front roller, and
the periodic unevenness identifying device (10) is configured to
use, as the total drafting ratio, a difference in circumferential speed
between the back roller and the drawing device (11), or a difference in
20 circumferential speed between the back roller and the front roller.
18. Atextile processing system (100) comprising:
an upstream process machine (130) configured to produce a first
fiber bundle (S);
25 a downstream process machine (150) configured to produce a
second fiber bundle (Y) by at least drafting the first fiber bundle (S);
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FP19-0122-00IN-MRT
a first acquisition device (5 a) configured to acquire first
information concerning the upstream process machine (130);
a thickness unevenness detector (8) configured to detect
thickness unevenness information concerning periodic unevenness of
5 thickness in the second fiber bundle (Y); and
a periodic unevenness identifying device (10) configured to
identify, based on the first information, the thickness unevenness
information, and a total drafting ratio in the downstream process
machine (150), periodic unevenness occurring in the second fiber
10 bundle (Y) due to the upstream process machine (130).
19. A computer readable recording medium recording a periodic
unevenness detecting program that causes a computer, in a textile
processing system (100) configured to produce a first fiber bundle (S)
15 by an upstream process machine (130) and to produce a second fiber
bundle (Y) by at least drafting the first fiber bundle (S) by a
downstream process machine (150), to perform:
processing of acquiring first information concerning the
upstream process machine (130);
20 processing of detecting thickness unevenness information
concerning periodic unevenness of thickness in the second fiber bundle
(S); and
processing of identifying, based on the first information, the
thickness unevenness information, and a total drafting ratio in the
25 downstream process machine (150), periodic unevenness occurring in
the second fiber bundle (Y) due to the upstream process machine (130).