DESCRIPTION
Title of Invention
SPINNING MACHINE, TAKE-UP DEVICE, AND TEXTILE
M A C m
Technical Field
[0001] The present invention relates to a spinning machine, a winding
device, and a textile machine.
Background Art
[0002] A textile machine described in Patent Literature 1 has been
conventionally known as a technique in such a field. The technique
described in Patent Literature 1 digitizes a yarn unevenness electric
signal obtained from a yam unevenness detector (for example, a clearer)
installed on a textile machine such as a spinning frame, and analyzes the
digitized signal with a calculator, thereby detecting yarn unevenness.
[0003] In addition, a technique described in Patent Literature 2 has been
known as an abnormality detection method for a drafting device in a
spinning machine. With this technique, variation in load torque acting
on a driving motor that drives a drafting roller is monitored, and the
operation of the drafting device is stopped if it is determined that there
is an abnormality because the variation of the load torque exceeded a
certain rate.
Citation List
Patent Literature
[0004] Patent Literature 1: Japanese Patent Application Laid-Open
Publication No. 58-625 1 1
Patent Literature 2: Japanese Patent Application Laid-Open
Publication No. 2003- 166 135
Summary of Invention
Technical Problem
[0005] The technique described in Patent Literature 1 may fail to detect
relatively long-periodic unevenness if an unevenness detector has
insufficient detection accuracy. The technique described in Patent
Literature 2 monitors variation in load torque on a motor, but does not
detect a cyclic abnormality.
[0006] An object of the present invention is to provide a spinning
machine that is capable of detecting a cyclic abnormality of a drafting
roller and improving detection accuracy of such an abnormality.
[0007] The present invention aims to provide a winding device that is
capable of detecting a cyclic abnormality of a rotary drum and
improving detection accuracy of such an abnormality.
[0008] The present invention aims to provide a textile machine that is
capable of detecting a cyclic abnormality of a rotary body and
improving detection accuracy of such an abnormality.
Solution to Problem
[0009] A spinning machine includes: a drafting roller drafting a fiber
band; a motor rotationally driving the drafting roller; a monitoring
section monitoring at least one of torque and revolution speed of the
motor; and a periodic unevenness determining section determining a
cyclic abnormality of the drafting roller that appears as periodic
unevenness on the fiber band, on the basis of a monitor result of the
monitoring section.
[0010] This spinning machine monitors at least one of the torque and
the revolution speed of the motor driving the drafting roller that drafts
the fiber band, determining whether or not a cyclic abnormality appears
on the drafting roller on the basis of the monitor result. With this
configuration, the cyclic abnormality of the drafting roller that appears
as periodic unevenness on the fiber band can be detected, and a cyclic
abnormality of the drafted fiber band can be detected. Using a
conventional unevenness detector (clearer) comrnonly installed on a
spinning machine may fail to detect long-periodic unevenness. The
values of torque andlor revolution speed (monitor value) of the motor
can be detected precisely. Thus, the periodic unevenness determining
section can determine the periodic abnormality on the fiber band in
higher accuracy than the clearer, on the basis of the monitor value
obtained by monitoring the motor.
[0011] The periodic unevenness determining section may perform
frequency analysis on a value relating to at least one of the torque and
the revolution that are each the monitor result of the monitoring section
to determine the cyclic abnormality of the drafting roller. The
frequency analysis is effective means for determining a cyclic
abnormality, thus the cyclic abnormality of the drafting roller can be
detected precisely.
[OO 121 The spinning machine may include a plurality of such drafting
rollers arranged along a transporting direction of the fiber band, and a
plurality of such motors independently driving the drafting rollers.
The periodic unevenness determining section may determine which
motor out of the motors has cyclic abnormalities, on the basis of the
monitor result of the monitoring section. With this configuration, the
periodic unevenness determining section can reliably identify which
drafting roller among the drafting rollers has a cause of a periodic
unevenness. It is difficult to determine the drafting roller causing the
periodic unevenness with unevenness detection using a conventional
clearer in the case where multiple periodic unevenness occurs in an
overlapping manner.
[0013] The spinning machine may hrther include a periodic
unevenness detecting section disposed on a downstream of the drafting
roller. The periodic unevenness detecting section may detect
unevenness on the fiber band drafted with the drafting roller. The
periodic unevenness determining section may determine a cyclic
abnormality of the drafting roller on the basis of the monitor result of
the monitoring section and a detection result of the unevenness
detecting section to detect the periodic unevenness on the fiber band.
The periodic unevenness determining section can precisely detect the
cyclic abnormality of the drafting rollers on the basis of the monitor
result on the motors driving the drafting rollers and the detection result
of the unevenness on the fiber band detected by the unevenness
detecting section.
[0014] The spinning machine may hrther include a notifying section
notifying information relating to the monitor result of the monitoring
section. An operator can easily check for a cyclic abnormality of the
drafting rollers and promptly take an appropriate action, on the basis of
the information notified by the notifying section. Examples of the
notifying section are a displaying section and an audio outputting
section. In the case where the notifying section is the displaying
section, the operator can easily check the cyclic abnormality by looking
at the displaying section.
[0015] The spinning machine may Eurther include: an air spinning
device spinning the fiber band drafted with the drafting roller, with swirl
flows; and a winding device winding the fiber band spun from the air
spinning device into a package. The periodic unevenness determining
section may determine a cyclic abnormality of the drafting roller while
the winding device winds the fiber band into the package.
[OO 161 The periodic unevenness determining section can determine a
cyclic abnormality of the drafting rollers even while the winding device
winds the fiber band into the package. Thus, decrease in operating
efficiency of the spinning machine can be reduced.
[0017] A windier includes: a rotary drum making contacting with and
rotating a winding package to cause the winding package to wind a
yarn; a motor rotationally driving the rotary drum; a monitoring section
monitoring at least one of torque and revolution speed of the motor; and
a determining section determining a cyclic abnormality of the rotary
drum on the basis of a monitor result of the monitoring section.
[0018] This winding device monitors at least one of the torque and the
revolution speed of the motor driving the rotary drum, determining
whether or not a cyclic abnormality appears on the rotary drum on the
basis of the monitor result. With this configuration, the cyclic
abnormality of the rotary drum can be detected to ensure detection of an
abnormality such as eccentricity of the winding package, therefore, the
reliability of the winding device can be improved. Examples of the
winding device are a winding device in a spinning machine, and an
automatic winder.
[0019] The determining section may perform frequency analysis on a
value relating to at least one of the torque and the revolution speed that
are each the monitor result of the monitoring section to determine the
cyclic abnormality of the rotary drum. The frequency analysis is
effective means for determining a cyclic abnormality, thus the cyclic
abnormality of the rotary drum can be detected precisely.
[0020] The winding device may further include: a notifying section
notifying information relating to the monitor result of the monitoring
section. The operator can easily check a cyclic abnormality of the
drafting rollers and promptly take an appropriate action, on the basis of
the information notified by the notifying section. Examples of the
notifying section are a displaying section and an audio outputting
section. In the case where the notifying section is the displaying
section, the operator can easily check the cyclic abnormality by looking
at the displaying section.
[0021] A textile machine includes: a rotary body transporting a fiber
band; a motor rotationally driving the rotary body; a monitoring section
monitoring at least one of torque and revolution speed of the motor; and
a determining section determining a cyclic abnormality of the rotary
body on the basis of a monitor result of the monitoring section.
[0022] This textile machine monitors at least one of the torque and the
revolution speed of the motor driving the rotary body that transports the
fiber band, determining whether or not a cyclic abnormality appears on
the rotary body on the basis of the monitor result. Note that "a rotary
body transporting a fiber band" includes a device transporting a fiber
band and other devices capable of performing certain processing, such
as "drafting a fiber band (sliver)" and/or "winding a yarn",
accompanying the rotation of the rotary body.
LO0231 For example, in the case where a fiber band (including a sliver
and a yarn) moving accompanying the rotation of the rotary body has a
defect such as a periodically changing thickness, load torque acting on
the motor varies, and the revolution speed of the motor varies. Thus,
whether or not a cyclic abnormality appears on the rotary body is
determined by monitoring at least one of the torque and the revolution
speed of the motor, thereby detecting the periodic abnormality on the
fiber band processed by the rotary body. This makes it possible to
detect long-periodic unevenness which is difficult to be detected by a
conventional unevenness detector (clearer).
LO0241 The determining section may perform frequency analysis on a
value relating to at least one of the torque and the revolution speed that
are each the monitor result of the monitoring section to determine the
cyclic abnormality of the rotary body. The fi-equency analysis is
effective means for determining a cyclic abnormality, thus the cyclic
abnormality of the rotary body can be detected precisely.
LO0251 The textile machine may hrther include: a notifying section
notifying information relating to the monitor result of the monitoring
section. The operator can easily check a cyclic abnormality of the
rotary body and promptly take an appropriate action, on the basis of the
information notified by the notifying section. Examples of the
notifying section are a displaying section and an audio outputting
section. In the case where the notifying section is the displaying
section, the operator can easily check the cyclic abnormality by looking
at the displaying section.
Advantageous Effects of Invention
[0026] A spinning machine of the present invention is capable of
detecting a cyclic abnormality of a drafting roller and improving
detection accuracy of such an abnormality.
[0027] A winding device of the present invention is capable of
detecting a cyclic abnormality of a rotary drum and improving detection
accuracy of such an abnormality.
[0028] A textile machine of the present invention is capable of detecting
a cyclic abnormality of a rotary body and improving detection accuracy
of such an abnormality.
Brief Description of Drawings
[0029] [Fig. 11 Fig. 1 is a front view of a spinning frame of an
embodiment of the present invention.
[Fig. 21 Fig. 2 is a longitudinal sectional view of the spinning
frame illustrated in Fig. 1.
[Fig. 31 Fig. 3 is a block configuration diagram illustrating a
unit controller in a spinning unit of a first embodiment of the present
invention.
[Fig. 41 Fig. 4 is a block configuration diagram illustrating the
unit controller in the spinning unit of a second embodiment of the
present invention.
[Fig. 51 Fig. 5 is a flow chart illustrating a procedure executed
in a periodic unevenness detection process.
[Fig. 61 Fig. 6 is a schematic configuration diagram illustrating
a winding unit in an automatic winder of a third embodiment of the
present invention.
Description of Embodiments
[0030] A spinning frame (spinning machine) according to an
embodiment of the present invention is described with reference to the
accompanying drawings. Note that an "upstream" and a "downstream"
in this description mean the upstream and the downstream in a running
direction of a yam during spinning, respectively.
[0031] A spinning frame 1 illustrated in Fig. 1 and Fig. 2 includes a
plurality of spinning units 2 aligned next to each other. The spinning
frame 1 includes a yam joining carriage 3 capable of running along the
aligning direction of the spinning units 2, a motor box 5, a central
controller (not illustrated) controlling the spinning frame 1, and unit
controllers 60 (refer to Fig. 3 and Fig. 4) controlling the spinning units
[0032] For example, the central controller may be installed in the motor
box 5. The central controller is electrically connected to the multiple
unit controllers 60 to integrally control the unit controllers 60. The
unit controller 60 is provided to each spinning unit 2 to independently
control the spinning unit 2 (will be described in detail later).
[0033] Each spinning unit 2 (spinning machine) includes a drafting
device 7, a spinning section 9 (air spinning device), a yam clearer 52, a
yam slack-eliminating device 12 (yam storage device), and a winding
device 13, in this order from upstream to downstream. The drafting
device 7 is provided near the top end of a case 6 of the spinning frame 1.
A fiber band 8 fed from the drafting device 7 is supplied to the spinning
section 9 to be spun. A spun yarn 10 that has been spun by the
spinning section 9 passes through the yarn clearer 52. Thereafter, the
spun yarn 10 is fed by the yarn slack-eliminating device 12 and wound
by the winding device 13, whereby a package 45 is formed.
5 [0034] The drafting device 7 drafts a sliver 15 to obtain a fiber band 8.
The drafting device 7 includes a plurality of pairs of drafting rollers 16,
17, 19, and 20 (rotary bodies) aligned along a feeding direction
(transporting direction) of the fiber band 8 and drafts the fiber band 8
with the drafting rollers 16, 17, 19, and 20. As illustrated in Fig. 2, the
10 drafting device 7 includes back rollers 16, third rollers 17, second rollers
19 around which apron belts 18 are wound, and front rollers 20, serving
as the drafting rollers 16, 17, 19, and 20, respectively. The drafting
rollers 16, 17, 19, and 20 each include a pair of a top roller and a bottom
roller. The top roller and the bottom roller are arranged to sandwich
15 therebetween the sliver 15.
LO0351 The drafting device 7 includes a drafting cradle (not illustrated).
The drafting cradle supports the top rollers and opens and closes by
swinging about a certain pivot. Under a state in which the drafting
cradle is closed, the top rollers make contact with the bottom rollers,
20 and the drafting device 7 drafts the fiber band 8. If the drafting cradle
is not closed at a proper position, a periodic unevenness can be
generated on the fiber band 8.
[0036] The drafting device 7 includes motors 31 to 34 to drive the
bottom rollers of the drafting rollers 16, 17, 19, and 20. The motor 3 1
25 rotationally drives the back roller 16. The motor 32 rotationally drives
the third roller 17. The motor 33 rotationally drives the second roller
19. The motor 34 rotationally drives the fiont roller 20. Although a
single motor rotationally drives a single drafting roller in the present
embodiment, a single motor may rotationally drive a plurality of
drafting rollers. For example, a single motor may rotationally drive
5 the back roller 16 and the third roller 17 which are drafting rollers in a
low-speed side.
LO0371 The top rollers of the drafting rollers 16, 17, 19, and 20 are
configured to rotate by following the bottom rollers rotationally driven
by the motors 3 1 to 34.
10 [0038] The spinning unit 2 includes a motor controller 30 that controls
the rotation of the motors 31 to 34. The motor controller 30 is
electrically connected to the motors 3 1 to 34. The motor controller 30
can detect load torque acting on each of the motors 31 to 34. The
motor controller 30 can detect the revolution speed of the output shaft of
15 each of the motors 3 1 to 34. It is enough for the motor controller 30 to
be capable of detecting at least one of the torque and the revolution
speed. The motor controller 30 outputs data relating to the torque
and/or the revolution speed of each of the motor s 3 1 to 34 to the unit
controller 60.
20 [0039] The detailed structure of the spinning section 9 is not illustrated,
but the present embodiment employs a pneumatic structure using
swirling air flow (swirl flow) to twist the fiber band 8, so as to produce
a spun yarn 10.
[0040] The yarn slack-eliminating device 12 applies certain tension to
25 the spun yarn 10 and draws the spun yarn 10 from the spinning section 9.
The yarn slack-eliminating device 12 prevents the spun yarn 10 fiom
slacking by storing the spun yarn 10 fed out from the spinning section 9
when the yarn joining carriage 3 performs yarn joining. The yarn
slack-eliminating device 12 adjusts the tension of the spun yarn 10 so as
to prevent the variation in the tension of the spun yarn 10 at the winding
device 13 from propagating to the spinning section 9.
[0041] The yam slack-eliminating device 12 includes a slack
eliminating roller (yalm storage roller) 2 1, a yam hookillg nle~nber 22,
an upstream guide 23, an electric motor 25, a downstream guide 26, and
a yarn storage amount sensor 27.
[0042] The yarn hooking member 22 is configured to hook the spun
yarn 10. The yarn hooking member 22 hooked with the spun yarn 10
integrally rotates with the slack eliminating roller 21, thereby winding
the spun yarn 10 on an outer peripheral surface of the slack eliminating
roller 2 1.
[0043] The slack eliminating roller 21 winds a certain amount of the
spun yarn 10 around the outer peripheral surface thereof to store the
spun yarn 10. The slack eliminating roller 2 1 is rotationally driven by
the electric motor 25. Rotation of the slack eliminating roller 21
tightens the spun yarn 10 wound around the outer peripheral surface of
the slack eliminating roller 2 1, thereby drawing the spun yarn 10 from
the upstream of the yarn slack-eliminating device 12. That is, when
the spun yarn 10 is wound around the outer peripheral surface of the
slack eliminating roller 2 1, rotation of the slack eliminating roller 2 1 in
a certain revolution speed applies certain tension to the spun yarn 10
and draws the spun yarn 10 out from the spinning section 9 at a certain
speed, thereby transporting the spun yarn 10 to the downstream at a
certain speed.
[0044] A certain 'contact area can be obtained between the slack
eliminating roller 21 and the spun yarn 10 by winding the certain
amount of the spun yam 10 around the outer peripheral surface of the
slack eliminating roller 21. This configuration enables the slack
eliminating roller 21 to hold and draw the spun yarn 10 with sufficient
strength. Thus, the spun yarn 10 can be drawn out from the spinning
section 9 at a stable speed without causing slip for example. As
illustrated in Fig. 2, since there is no additional component (such as a
conventional delivery roller) applying the tension to the spun yarn 10
between the spinning section 9 and the slack-eliminating device 12, the
revolution speed of the slack eliminating roller 21 determines the speed
of the spun yarn 10 drawn out from the spinning section 9.
Consequently, the spinning frame 1 of the present embodiment applies
the tension to the spun yarn 19 with the slack-eliminating device 12,
thereby drawing out the spun yarn 10 from the spinning section 9 at an
accurate speed with less variation.
[0045] The yarn storage amount sensor 27 detects a storage amount of
the spun yarn 10 stored on the slack eliminating roller 21 in a
non-contact manner and sends the detected storage amount to the unit
controller 60.
[0046] The upstream guide 23 is arranged slightly upstream of the slack
eliminating roller 21. The upstream guide 23 properly guides the spun
yarn 10 to the outer peripheral surface of the slack eliminating roller 2 1.
The upstream guide 23 prevents a twist of the spun yarn 10 propagating
from the spinning section 9 from being propagated to the downstream of
the upstream guide 23.
[0047] The yarn clearer 52 is provided between the spinning section 9
and the slack-eliminating device 12, in the front face side of the case 6
of the spinning frame 1. The spun yarn 10 spun in the spinning section
5 9 passes through the yarn clearer 52 before being wound by the
slack-eliminating device 12. The yarn clearer 52 monitors the
thickness of the spun yarn 10 running therethrough and sends a yarn
defect detection signal to the unit controller 60 (controller) if a yarn
defect on the spun yarn 10 is detected. The yarn clearer 52 is arranged
10 downstream of the drafting device 7 and serves as an unevenness
detecting section detecting unevenness on the fiber band 8 drafted with
the drafting device 7.
[0048] In the case where a yarn defect is detected and yarns are to be
joined, the unit controller 60 stops the drafting device 7, the spinning
15 section 9, and other devices, in a certain timing. In this case, the unit
controller 60 cuts the spun yarn 10 by interrupting the blow of
compressed air from a nozzle in the spinning section 9 which generates
swirl flow.
[0049] The unit controller 60 sends a control signal to the yarn joining
20 carriage 3 to move the yarn joining carriage 3 to the front of the relevant
spinning unit 2. Thereafter, the unit controller 60 drives the spinning
section 9 and other devices again, causes the yarn joining carriage 3 to
perform yarn joining, and restarts winding. In this case, the yarn
slack-eliminating device 12 eliminates slack on the spun yarn 10 by
25 storing the spun yarn 10 continuously fed out from the spinning section
9 on the slack eliminating roller 21 during a period fiom the restart of
spinning in the spinning section 9 to the restart of winding.
[0050] The yarn joining carriage 3 includes a splicer (yam joining
device) 43, a suction pipe 44, and a suction mouth 46. When a yarn
breakage or a yarn cut has occurred in one spinning unit 2, the yarn
5 joining carriage 3 travels on a rail 41 to the relevant spinning unit 2 and
stops there. The suction pipe 44 swings up and down about a pivot,
sucks and catches a yarn end fed out from the spinning section 9, and
guides it to the splicer 43. The suction mouth 46 swings up and down
about a pivot, sucks and catches a yarn end from the package 45
10 supported with the winding device 13, and guides it to the splicer 43.
The splicer 43 joins the yarn ends guided thereto.
[005 11 The winding device 13 includes a cradle arm 7 1 supported to be
able to swing about a pivot 70. The cradle arm 71 rotationally
supports a bobbin 48 for winding the spun yarn 10.
15 [0052] The winding device 13 includes a winding drum 72 (rotary
drum), and a traverse device 75. The winding drum 72 can drive while
making contact with an outer circumferential surface of the bobbin 48
or the package 45. The traverse device 75 includes a traverse guide 76
that can hook the spun yam 10. While reciprocating the traverse guide
20 76 using unillustrated driving means, the winding device 13 drives the
winding drum 72 with an electric motor (not illustrated) for rotating the
package 45 making contact with the winding drum 72, thereby winding
the spun yarn 10 while traversing the spun yarn 10. Fig. 1 illustrates
the winding device 13 that is configured to wind the cylindrical package
25 45. The winding device 13, however, may be configured to wind a
conical package.
[0053] The spinning frame 1 may be configured to rotationally drive
the winding drums 72 of the spinning units 2 using a common electric
motor or configured to provide each spinning unit 2 with a dedicated
electric motor and rotationally drive each winding drum 72
independently.
[0054] The unit controller 60 can detect cyclic abnormalities on the
drafting rollers 16, 17, 19, and 20. The unit controller 60 (controller)
includes a central processing unit (CPU) performing arithmetic
processing, a read only memory (ROM) and a random access memory
(RAM) each serving as a storage, an input signal circuit, an output
signal circuit, and a power supply circuit, for example. The unit
controller 60 executes a program stored in the storage, thereby realizing
a yarn unevenness signal detecting section 61, a yarn
unevenness/periodic unevenness determining section 62, a motor
monitoring section 63 (monitoring section), and a motor periodic
unevenness determining section 64.
[0055] The yarn unevenness signal detecting section 61 is electrically
connected to the yarn clearer 52 and obtains information relating to yarn
unevenness output from the yarn clearer 52. The yarn
unevenness/periodic unevenness determining section 62 obtains
information output from the yarn unevenness signal detecting section 6 1
to determine whether periodic yam unevenness (periodic unevenness) is
formed on the spun yarn 10.
[0056] The motor monitoring section 63 is electrically connected to the
motor controller 30 and obtains information (monitor value) relating to
torque of each of the motors 31 to 34 andor information (monitor
value) relating to revolution speed of each of the motors 3 1 to 34, output
from the motor controller 30. The motor monitoring section 63 serves
as a monitoring section that monitors at least one of the torque and the
revolution speed of each of the motors 31 to 34. The information
relating to torque of a motor can include information relating to load
torque acting on the output shaft of the motor and information available
to calculate the torque. The information relating to revolution speed of
a motor can include information relating to revolution speed of the
output shaft of the motor and information available to calculate the
revolution speed.
LO0571 The motor periodic unevenness determining section 64 obtains
information (monitor value) relating to the torque of each of the motors
31 to 34 andor information (monitor value) relating to the revolution
speed of each of the motors 3 1 to 34, output from the motor monitoring
section 63 to determine whether there are cyclic abnormalities on the
drafting rollers 16, 17, 19, and 20. The motor periodic unevenness
determining section 64 determines that the spun yarn 10 has a periodic
unevenness if a cyclic abnormality is detected on at least one of the
drafting rollers 16, 17, 19, and 20.
roo581 The motor periodic unevenness determinin-g section 64 identifies
drafting rollers among the drafting rollers 16, 17, 19, and 20 that have a
cyclic abnormality. When determining that the monitor value of the
motor 3 1 has a cyclic abnormality, the motor periodic unevenness
determining section 64 determines that the back rollers 16 have a cyclic
abnormality. When determining that the monitor value of the motor 32
has a cyclic abnormality, the motor periodic unevenness determining
section 64 determines that the third rollers 17 have a cyclic abnormality.
When determining that the monitor value of the motor 33 has a cyclic
abnormality, the motor periodic unevenness determining section 64
determines that the second rollers 19 (or the apron belts 18) have a
cyclic abnormality. When determining that the monitor value of the
motor 34 has a cyclic abnormality, the motor periodic unevenness
deteimining section 64 determines that the front rollers 20 have a cyclic
abnormality.
[0059] The motor periodic unevenness determining section 64
determines whether or not a cyclic abnormality appears on the drafting
rollers 16, 17, 19, and 20 by performing frequency analysis on a value
(monitor value) relating to at least one of the torque and the revolution
speed of each of the motors 3 1 to 34. The motor periodic unevenness
determining section 64 performs frequency analysis such as fast Fourier
transform (FFT) calculation in order to convert a time axis into
frequency. The monitor periodic unevenness determining section 64
may analyze the torque and/or the revolution speed by different
techniques and determine whether or not a cyclic abnormality appears
on the drafting rollers 16, 17, 19, and 20.
[0060] The spinning frame 1 may include a unit controller 60B
illustrated in Fig. 4, instead of the unit controller 60 illustrated in Fig. 3.
The unit controller 60B illustrated in Fig. 4 differs from the unit
controller 60 illustrated in Fig. 3 in that a periodic unevenness
determining section 65 is included therein, instead of the yam
unevenness/periodic unevenness determining section 62 and the motor
periodic unevenness determining section 63.
[0061] The periodic unevenness determining section 65 obtains
information relating to the detection result output from the yarn
unevenness signal detecting section 6 1 and information (monitor value)
relating to the torque of each of the motors 3 1 to 34 and/or information
(monitor value) relating to the revolution speed of each of the motors 3 1
to 34, output from the motor monitoring section 63. The periodic
unevenness determining section 65 detects a cyclic abnormality of the
drafting rollers 16, 17, 19, and 20 on the basis of the monitor result
(monitor value) from the motor monitoring section 63 and the detection
result from the yam unevenness signal detecting section 61. The
periodic unevenness determining section 65 determines that the spun
yarn 10 has a periodic unevenness if a cyclic abnormality is detected on
at least one of the drafting rollers 16, 17, 19, and 20. The periodic
unevenness determining section 65 has both functions of the yarn
unevenness/periodic unevenness determining section 62 and the motor
periodic unevenness determining section 63.
[0062] The spinning frame 1 includes a displaying section 66 (notifying
section) that displays the determination result from the motor periodic
unevenness determining section 64 (or the periodic unevenness
determining section 65). The displaying - . - section 66 may be provided
on the case of the motor box 5 of the spinning frame 1. A liquid
crystal display device may be used as the displaying section 66. In
accordance with signals from the unit controller 60, the displaying
section 66 electrically connected to the unit controller 60 can display
information relating to whether there is a cyclic abnormality. Thus, the
operator can easily check for a cyclic abnormality by looking at the
display contents on the displaying section 66. The displaying section
66 can display different information other than the display contents
relating to the abnormality in the drafting rollers 16, 17, 19, and 20.
[0063] The spinning frame 1 may include an audio outputting section
5 instead of the displaying section 66. This configuration allows the
spinning frame 1 to notify whether there is an abnormality by a voice
and/or an alarm. A warning lamp, for example, may be used as the
displaying section.
[0064] Next, a periodic unevenness detection process is described with
10 reference to Fig. 5. The periodic unevenness detection process is
performed, for example, in a normal spinning operation. As illustrated
in Fig. 5, the unit controller 60 processes steps S 11 to S 14, steps S21 to
S24, steps S31 to S34, and steps S41 to S44, concurrently. These
processes are performed repeatedly. The processing of steps S11 to
15 S14, steps S21 to S24, steps S31 to S34, and steps S41 to S44 may be
performed in this order or in a different order.
[0065] The following describes the processing of steps S11 to S14.
First, the motor monitoring section 63 of the unit controller 60 monitors
the motor 34 rotationally driving the bottom roller of the front rollers 20
20 to obtain the monitor value (such as torque and revolution speed) of the
motor 34 (step S 1 1). Next, the motor periodic unevenness determining
section 54 of the unit controller 60 obtains the monitor value of the
motor 34 from the motor monitoring section 63, and performs FFT
calculation on the obtained monitor value (step S 12).
25 [0066] Thereafter, the motor periodic unevenness determining section
64 of the unit controller 60 determines whether there is a cyclic
abnormality on the basis of the analysis result of the FFT calculation
(step S 13). For example, the motor periodic unevenness determining
section 64 determines that there is a cyclic abnormality in the case
where the data vary periodically (Yes at step S13). When it is
determined that there is a cyclic abnormality, the process of the unit
controller 60 proceeds to step S 14. When it is determined that there is
no cyclic abnormality (No at step S13), the process of the unit controller
60 terminates. At step S14, the motor periodic unevenness
determining section 64 determines that a periodic unevenness caused by
the front rollers 20 is appearing on the spun yam 10.
[0067] The following describes the processing of steps S21 to S24.
First, the motor monitoring section 63 of the unit controller 60 monitors
the motor 33 rotationally driving the bottom roller of the second rollers
19 to obtain the monitor value (such as torque and revolution speed) of
the motor 33 (step S21). Next, the motor periodic unevenness
determining section 54 of the unit controller 60 obtains the monitor
value of the motor 33 from the motor monitoring section 63, and
performs FFT calculation on the obtained monitor value (step S22).
[0068] Thereafter, the motor periodic unevenness determining section
64 of the unit controller 60 determines whether there is a cyclic
abnormality on the basis of the analysis result of the FFT calculation
(step S23). For example, the motor periodic unevenness determining
section 64 determines that there is a cyclic abnormality in the case
where portions including a prominent value appear periodically (Yes at
step S23). When it is determined that there is a cyclic abnormality, the
process of the unit controller 60 proceeds to step S24. When it is
determined that there is no cyclic abnormality (No at step S23), the
process of the unit controller 60 terminates. At step S24, the motor
periodic unevenness determining section 64 determines that a periodic
unevenness caused by the second rollers 19 (apron belt 18) is appearing
on the spun yarn 10.
[0069] The following describes the processing of steps S31 to S34.
The motor monitoring section 63 of the unit controller 60 monitors the
motor 32 rotationally driving the bottom roller of the third rollers 17 to
obtain the monitor value (such as torque and revolution speed) of the
motor 32 (step S3 1). Next, the motor periodic unevenness determining
section 54 of the unit controller 60 obtains the monitor value of the
motor 32 from the motor monitoring section 63, and performs FFT
calculation on the obtained monitor value (step S32).
[0070] Thereafter, the motor periodic unevenness determining section
64 of the unit controller 60 determines whether there is a cyclic
abnormality on the basis of the analysis result of the FFT calculation
(step S33). For example, the motor periodic unevenness determining
section 64 determines that there is a cyclic abnormality in the case
where portions including a prominent value appear periodically (Yes at
step S33), and the process proceeds to step 534. When it is determined
that there is no cyclic abnormality (No at step S33), the process of the
unit controller 60 terminates. At step S34, the motor periodic
unevenness determining section 64 determines that a periodic
unevenness caused by the third rollers 17 is appearing on the spun yarn
10.
[0071] The following describes the processing of steps S41 to S44.
The motor monitoring section 63 of the unit controller 60 monitors the
motor 3 1 rotationally driving the bottom roller of the back rollers 16 to
obtain the monitor value (such as torque and revolution speed) of the
motor 3 1 (step S41). Next, the motor periodic unevenness determining
section 54 of the unit controller 60 obtains the monitor value of the
motor 31 from the motor monitoring section 63, and performs FFT
calculation on the obtained monitor value (step S42).
[0072] Thereafter, the motor periodic unevenness determining section
64 of the unit controller 60 determines whether there is a cyclic
abnormality on the basis of the analysis result of the FFT calculation
(step S43). For example, the motor periodic unevenness determining
section 64 determines that there is a cyclic abnormality in the case
where portions including a prominent value appear periodically (Yes at
step S43). When it is determined that there is a cyclic abnormality, the
process of the unit controller 60 proceeds to step S44. When it is
determined that there is no cyclic abnormality (No at step S43), the
process of the unit controller 60 terminates. At step S44, the motor
periodic unevenness determining section 64 determines that a periodic
unevenness caused by the back rollers 16 is appearing on the spun yarn
10.
[0073] The unit controller 60 displays the above-mentioned
determination results on the displaying section 66 after steps steps S14,
S24, S34, and S44 (step S15). The displaying section 66 displays
information relating to the determination results in accordance with
signal output from the unit controller 60. For example, the displaying
section 66 indicates that the cause of the periodic unevenness occurred
on the spun yarn 10 is the fi-ont roller 20. The displaying section 66
may display the drafting rollers 16, 17, 19, or 20 that are the cause of
periodic unevenness, with character information. For example, the
displaying section 66 may display the layout of the drafting rollers 16,
17, 19, and 20, and exclusively highlight drafting rollers which are the
cause of the periodic unevenness (for example, displaying in red andlor
displaying in blinking). The displaying section 66 may display the
determination result by displaying a graph of the monitor values of each
of the drafting rollers 16, 17, 19, andlor 20.
[0074] If it is determined that any one of the drafting rollers 16, 17, 19,
and 20 has a cyclic abnormality, the unit controller 60 (controller) may
stop the operation of the spinning unit 2, instead of displaying the result
at step S 15 or in addition to the result display. As mentioned above, in
the case where the unit controller 60 stops the operation of the spinning
unit 2, the unit controller 60 may cause the displaying section 66 to
display that the drafting cradle is not closed at a proper position andlor
at least one of the drafting rollers 16, 17, 19, and 20 has reached the
replacement time thereof. In the case where the drafting cradle is not
closed at a proper position and at least one of the drafting rollers 16, 17,
19, and 20 is displaced from a proper position, the unit controller 60 can
determine that at least one of the drafting rollers 16, 17, 19, and 20
includes a cyclic abnormality.
[0075] Note that, the unit controller 60 may determine whether or not a
cyclic abnormality is appearing on the basis of the yarn defect detection
signal fkom the yarn clearer 52 after each step of S13, S23, S33, and
S43. For example, by comparing the determination result of FFT
calculation and a signal from the yarn clearer 52, the unit controller 60
can precisely perform periodic unevenness detection when a
determination can be made that periodic unevenness is appearing in the
same cycle.
[0076] The spinning frame 1 of the embodiment monitors the torque
and/or the revolution speed of each of the motors 3 1 to 34 driving the
respective drafting rollers 16, 17, 19, and 20 drafting the fiber band,
thereby determining whether or not a cyclic abnormality appears on the
drafting rollers 16, 17, 19, and 20 on the basis of the monitor results.
This configuration enables detection of a cyclic abnormality of the
drafting rollers 16, 17, 19, and 20, thereby detecting periodic
unevenness on the spun yarn 10. The spinning frame 1 can detect
periodic unevenness on the spun yarn 10 with higher precision than that
by the detection of periodic unevenness using only a conventional
clearer.
[0077] The present invention is described on the basis of an
embodiment thereof, but is not limited to the embodiment.
[0078] Although the spinning frame 1 (air spinning machine) is not
provided with a delivery roller and a nip roller in the above-described
embodiment, the spinning machine of the present invention is not
limited thereto and may be provided with the delivery roller and the nip
roller. The delivery roller and the nip roller are arranged downstream
of the spinning section 9, for example. The spun yarn 10 spun from
the spinning section 9 is sandwiched between the delivery roller and the
nip roller and transported, and wound in the winding device 13. Note
that the torque and/or the revolution speed of a motor rotationally
driving the delivery roller may be monitored to determine whether or
not a cyclic abnormality appears on the delivery roller and/or the nip
roller.
[0079] The spinning machine is not limited to an air spinning machine,
and may be different spinning machines including a drafting device. A
ring spinning frame and a drawing frame are examples of the spinning
machine.
[0080] The motor monitoring section (monitoring section) may monitor
at least one of the torque and the revolution speed of the motor. For
example, when the motor is a brushless motor, current detection for
monitoring torque is not typically performed, and only revolution speed
detection is performed. Thus, revolution speed is monitored in this
case.
[0081] In the detection of periodic unevenness in the above-described
embodiment, the monitor result of the motor monitoring section 63 and
the detection result of the yarn clearer 52 are both used to make
determination. However, periodic unevenness may be detected only
on the basis of the monitor result of the motor monitoring section 63.
[0082] In the above-described embodiment, when a yarn defect is
detected and yarns are to be joined, the spun yarn 10 is cut by
interrupting the blow of compressed air from the nozzle in the spinning
section 9 which generates swirl flow, however, other methods may be
used to cut the spun yarn 10. For example, the spun yarn 10 can be cut
by a cutter arranged between the spinning section 9 and the yarn clearer
52.
[0083] In the above-described air spinning machine, a yarn path is
oriented from the upside to the downside in the machine height
direction, but this is not limiting a configuration thereof. For example,
a different arrangement in which the yarn path is oriented from the
downside to the upside may be possible.
[0084] It is preferable that the spinning section 9 include a needle
(needle-like member) to prevent a yarn twist in the spinning section 9
from propagating to the front rollers 20. However, the needle can be
omitted.
[0085] The air spinning machine may be configured such that the
bottom roller of the drafting device and the traverse mechanism of the
winding device of a plurality of the spinning units 2 are commonly
driven (by a line shaft). In the air spinning machine, the drafting
device andlor the winding device may be provided independently in
each winding unit.
[0086] The spinning frame 1 in the above-described embodiment
includes the motor controller 30 controlling the motors 3 1 to 34 and the
unit controller 60 controlling the spinning units 2, separately. However,
the unit controller 60 may control the motors. The motor controller 30
may serve as the determining section to determine whether there is a
cyclic abnormality.
[0087] The spinning frame 1 in the above-described embodiment
includes the unit controller 60 that controls each spinning unit 2
independently. However, the unit controller 60 controlling a certain
number of spinning units 2 may be provided for the spinning units 2.
[0088] The unit controller 60 in the above-described embodiment
normally monitors at least one of the torque and the revolution speed of
each of the motors 31 to 34 during winding of the package 45.
However, the monitoring may be performed during a specific time and,
whether or not a cyclic abnormality appears on the drafting rollers 16,
17, 19, and 20 may be determined on the basis of the monitor result.
The spinning frame 1 may be provided with a spinning test mode and
monitor at least one of the torque and the revolution speed of each of the
motors 3 1 to 34 while operating under the spinning test mode. In this
case, whether or not a cyclic abnormality appears on the drafting rollers
16, 17, 19, and 20 may be determined on the basis of the monitor result.
Note that, it is preferable to perform the monitoring during winding of
the package 45 in order to maintain the operation efficiency of the
spinning frame 1.
[0089] The unit controller 60 in the above-described embodiment
monitors at least one of the torque and the revolution speed of each of
the motors 31 to 34 driving the respective drafting rollers 16, 17, 19,
and 20 and determines whether there is periodic unevenness associated
with each of the motors 31 to 34. However, this is not limiting the
embodiment. For example, the unit controller 60 may monitor at least
one of the torque and the revolution speed of the specific motor among
the motors 31 to 34 to determine whether there is periodic unevenness
caused by a cyclic abnormality of the specific motor.
[0090] The spinning frame 1 in the above-described embodiment
includes a plurality of unit controllers 60 and the respective spinning
units 2 are controlled by the unit controllers 60. However, the control
of the spinning units 2 may be integrated and executed in the central
controller.
[0091] The present invention can be applied to a winding device as well
as the spinning frame 1. Examples of the winding device in the
present invention are a winding device in a spinning machine, and a
winding device in an automatic winder.
5 [0092] An automatic winder according to a third embodiment of the
present invention is described with reference to the accompanying
drawings. The automatic winder in the present embodiment illustrated
in Fig. 6 includes a plurality of winder units 110 and a central controller
(not illustrated) controlling the automatic winder. Note that the same
10 explanations with those of the above-described embodiments are
omitted.
[0093] Each winder unit 110 winds a spun yarn 120 unwound from a
yarn supplying bobbin 121 around a winding bobbin 122 while
traversing the spun yarn 120 to form a package 130 having a certain
15 length and a certain shape.
[0094] The winder unit 1 10 includes a winding unit body 1 16 and a unit
controller 160. The winding unit body 1 16 includes a yarn supplying
section 1 12, a yarn tensioner 1 13, splicer 1 14 (yarn joining device), a
yarn clearer 115, and a winding device 117 that are arranged in this
20 order along- the yarn running- direction.
[0095] The yarn supplying section 11 1 feeds the spun yarn 120 to be
wound around the package 130. The yarn supplying section 111
includes an unwinding assisting device 112. The unwinding assisting
device 112 lowers a restriction member 140 covering a core tube as the
25 spun yarn 120 unwinds from the feeder bobbin 121 to assist the
unwinding of the spun yarn 120 from the feeder bobbin 12 1.
[0096] The yarn tensioner 113 applies certain tension to the spun yarn
120 to be wound around the package 130. A gate-type yarn tensioner
in which movable comb teeth are arranged with respect to fixed comb
teeth may be used as the yarn tensioner 11 3. The yarn tensioner 1 13
5 can apply constant tension to the spun yarn 120 to be wound, thereby
improving the quality of the package 130. A disc-type yarn tensioner
can be used as the yarn tensioner 113 instead of the above-described
gate-type tensioner.
[0097] The yarn clearer 115 monitors the quality of the spun yarn 120
10 to be wound around the package 130. When the yarn clearer 115
detects a yarn defect, the spun yarn 120 is cut and the yarn defect is
removed. The yarn clearer 115 includes a clearer head 149 provided
with a sensor (not illustrated) to detect a thickness of the spun yarn 120.
The yarn clearer 11 5 detects a yarn defect by monitoring yarn thickness
15 signals from the sensor. Near the clearer head 149, a cutter (not
illustrated) is arranged to cut the spun yarn 120 immediately when the
yarn clearer 1 15 detects a yarn defect.
COO981 The splicer 114 joins the spun yarn 120 from the feeder bobbin
121 (lower yarn) and the spun yarn 120 from the package 130 (upper
20 yarn) when the yarn clearer 115 cuts the yarn upon detection of a yarn
defect or when the yarn unwound from the feeder bobbin 121 breaks,
for example.
[0099] A lower yarn guide pipe 125 is arranged below the splicer 1 14
(by the feeder bobbin 121) to capture the lower yarn from the feeder
25 bobbin 12 1 and guide it to the splicer 1 14. An upper yarn guide pipe
126 is arranged above the splicer 114 (by the package 130) to capture
the upper yarn from the package 130 and guide it to the splicer 114.
[0100] The lower yarn guide pipe 125 and the upper yarn guide pipe
126 are able to swing about pivots 133 and 135, respectively. The tip
end of the lower yarn guide pipe 125 is provided with a suction opening
132. The tip end of the upper yarn guide pipe 126 is provided with a
suction mouth 134. The lower yarn guide pipe 125 and the upper yarn
guide pipe 126 are each connected to an appropriate negative pressure
source (not illustrated). The negative pressure source generates
suction flows which allow the suction opening 132 and the suction
mouth 134 to suck and capture the upper yarn and the lower yarn,
respectively.
[0101] The winding device 117 includes a cradle 123 rotationally
supporting the package 130, a winding drum 124 (rotary drum, rotary
body) rotating the package 130 while making contact with the package
130, a motor 153 rotationally driving the winding drum 124, and a
motor controller 154 controlling the rotation of the motor 153. The
winding drum 124 is provided with traversing grooves 127 for
traversing the spun yarn 120 with respect to the package 130. With
this configuration, the winder unit 110 can wind the spun yarn 120
around the package 130 while traversing the spun yarn 120.
[0102] The motor controller 154 is electrically connected to the motor
153. The motor controller 154 detects load torque acting on the motor
153. The motor controller 154 detects the revolution speed of the
output shaft of the motor 153. It is enough for the motor controller
154 to be capable of detecting at least one of the torque and the
revolution speed. The motor controller 154 outputs data relating to the
torque andor the revolution speed of a motor 154 to the unit controller
160.
[0103] The unit controller 160 can detect cyclic abnormalities on the
winding drum 124. The unit controller 160 (controller) includes a
CPU performing arithmetic processing, a ROM and a RAM each
sewing as a storage, an input signal circuit, an output signal circuit, and
a power supply circuit, for example. The unit controller 160 executes
a program stored in the storage, thereby realizing a motor monitoring
section 163 (monitoring section), and a determining section 164.
[0104] The motor monitoring section 163 is electrically connected to
the motor controller 154 and obtains information (monitor value)
relating to the torque of the motor 153 andor information (monitor
value) relating to the revolution speed of the motor 153, output from the
motor controller 154. The motor monitoring section 163 serves as a
monitoring section that monitors at least one of the torque and the
revolution speed of the motor 153.
[0105] The determining section 164 determines whether or not a cyclic
abnormality appears on the winding drum 124 by performing frequency
analysis on a value (monitor value) relating to at least one of the torque
and the revolution speed of the motor 153. The determining section
164 performs frequency analysis such as fast Fourier transform (FFT)
calculation in order to convert a time axis into frequency. The
determining section 164 may analyze the torque andor the revolution
speed by different techniques and determine whether or not a cyclic
abnormality appears on the winding drum 124.
[0106] The automatic winder includes a displaying section 66
(notifying section) displaying the determination result of the
determining section 164. In accordance with signals from the unit
controller 160, the displaying section 66 electrically connected to the
unit controller 160 can display information relating to whether there is a
cyclic abnormality. Thus, the operator can easily check a cyclic
abnormality by looking at the display contents on the displaying section
66. The displaying section 66 can display different information other
than the display contents relating to the abnormality in the winding
drum 124.
[0107] The winding device 117 in the automatic winder determines
whether or not a cyclic abnormality appears on the motor 153 by
monitoring at least one of the torque and the revolution speed of the
motor 153, thereby detecting the cyclic abnormality of the winding
drum 124. With this configuration, an abnormality such as eccentricity
of the package 130 can be detected in an early stage.
[0108] The winding device 117 may include a traverse mechanism
separate from a winding drum 124, instead of the winding drum 124 on
which the traversing grooves 127 are formed, similarly to the winding
device 13 of the spinning frame 1. In this case, the monitoring section
of the winding device monitors at least one of the torque and the
revolution speed of the motor rotationally driving a winding drum
having no traversing grooves.
[0109] In the case where the automatic winder includes a winding drum
having no traversing grooves, the package 130, instead of the winding
drum, may be rotationally driven directly. In this case, the monitoring
section monitors at least one of the torque and the revolution speed of a
motor directly rotationally driving the package 13 0.
[O 1 101 The above-described embodiments describe the applications to
the spinning machine and the winding device, however, the
embodiments are not limiting the invention. The present invention can
be embodied as other kinds of textile machines. That is, the
configuration may be suitable for a textile machine provided with a
motor driving a rotary body, in which a cyclic abnormality of the rotary
body can be determined by monitoring at least one of the load torque
acting on the motor and the revolution speed of the motor.
[Olll] Such a textile machine includes a rotary body transporting the
fiber band, a motor rotationally driving the rotary body, a monitoring
section monitoring at least one of torque and revolution speed of the
motor, and a determining section determining a cyclic abnormality
appearing on the rotary body on the basis of the monitor result of the
monitoring section. The determining section of the textile machine
may perform frequency analysis on a value relating to at least one of the
torque and the revolution speed that are each the monitor result of the
monitoring section to determine the cyclic abnormality of the rotary
body. The textile machine may further include a notifying section
notifling information relating to the monitor result of the monitoring
section. Such a textile machine determines whether or not a cyclic
abnormality appears on the rotary body by monitoring at least one of the
torque and the revolution speed of the motor, thereby detecting a
periodic abnormality on the fiber band processed by the rota~yb ody.
Industrial Applicability
[0112] A spinning machine of the present invention is capable of
detecting a cyclic abnormality of a drafting roller and improving
detection accuracy of such an abnormality. A winding device of the
present invention is capable of detecting a cyclic abnormality of a rotary
drum and improving detection accuracy of such an abnormality. A
textile machine of the present invention is capable of detecting a cyclic
abnormality of a rotary body and improving detection accuracy of such
an abnormality.
Reference Signs List
[O 1 131 1.. . spinning frame (spinning device, textile machine), 2.. .
spinning unit (spinning machine), 7.. . drafting device, 8. .. fiber band, 9. ..
spinning section, 10.. . spun yarn, 16.. . back rollers (drafting roller), 17.. .
third rollers (drafting roller), 1 8 ... apron belts, 19 ... second rollers
(drafting roller), 20 ... front rollers, 30, 154 ... motor controller, 3 1 to 34 ...
motor, 52 ... yarn clearer, 60, 60B, 160 ... unit controller, 63, 163 ... motor
monitoring section (monitoring section), 64.. . motor periodic
unevenness determining section (determining section), 65 ... periodic
unevenness determining section (determining section), 66 ... displaying
section (notieing section), 1 10 ... automatic winder (textile machine),
1 17.. . winding device in the automatic winder, 124.. . winding drum
(rotary drum), 130. .. package, 164.. . determining section.

CLAIMS
1. A spinning machine comprising:
a drafting roller drafting a fiber band;
a motor rotationally driving the drafting roller;
a monitoring section monitoring at least one of torque and
revolution speed of the motor; and
a periodic unevenness determining section determining a cyclic
abnormality of the drafting roller, the cyclic abnormality appearing as
periodic unevenness on the fiber band, on the basis of a monitor result
of the monitoring section.
2. The spinning machine according to claim 1, wherein
the periodic unevenness determining section performs frequency
analysis on a value relating to at least one of the torque and the
revolution speed that are each the monitor result of the monitoring
section to determine the cyclic abnormality of the drafting roller.
3. The spinning machine according to claim 1 or 2, wherein
a plurality of such drafting rollers are arranged along a
transporting direction of the fiber band,
a plurality of such motors are independently driving the drafting
rollers, and
the periodic unevenness determining section determines which
motor out of the motors has a cyclic abnormality, on the basis of the
monitor result of the monitoring section.
4. The spinning machine according to any one of claims 1 to 3,
further comprising an unevenness detecting section disposed
downstream of the drafting roller to detect unevenness on the fiber band
drafted with the drafting roller, wherein
the periodic unevenness determining section determines a cyclic
abnormality of the drafting roller on the basis of the monitor result of
the monitoring section and a detection result of the unevenness
detecting section to detect the periodic unevenness on the fiber band.
5. The spinning machine according to any one of claims 1 to 4,
fkther comprising a notifjring section notifjring information relating to
the monitor result of the monitoring section.
6. The spinning machine according to any one of claims 1 to 5,
hrther comprising:
an air spinning device spinning the fiber band drafted with the
drafting roller, with swirl flows; and
a winding device winding the fiber band spun fiom the air
spinning device into a package, wherein
the periodic unevenness determining section determines a cyclic
abnormality of the drafting roller during winding of the package by the
winding device.
7. A winding device comprising:
a rotary drum making contact with and rotating a winding
package to wind a yarn around the winding package;
a motor rotationally driving the rotary drum;
a monitoring section monitoring at least one of torque and
revolution speed of the motor; and
a determining section determining a cyclic abnormality of the
rotary drum on the basis of a monitor result of the monitoring section.
8. The winding device according to claim 7, wherein
the determining section performs fkequency analysis on a value
relating to at least one of the torque and the revolution speed that are
each the monitor result of the monitoring section to determine the cyclic
abnormality of the rotary drum.
5 9. The winding device according to claim 7 or 8, further
comprising:
a notifying section notifying information relating to the monitor
result of the monitoring section.
10. A textile machine comprising:
10 a rotary body transporting a fiber band;
a motor rotationally driving the rotary body;
a monitoring section monitoring at least one of torque and
revolution speed of the motor; and
a determining section determining a cyclic abnormality of the
rotary body on the basis of a monitor result of the monitoring section.
1 1. The textile machine according to claim 10, wherein
the determining section performs fi-equency analysis on a value
relating to at least one of the torque and the revolution speed that are
each the monitor result of the monitoring section to determine the cyclic
abnormality sf the rotary body.
12. The textile machine according to claim 10 or 11, fiuther
comprising:
a notifying section notifying information relating to the monitor
result of the monitoring section.