YARN WINDING MACHINE AND YARN THREADING METHOD
TECHNICAL FIELD
[0001] The present disclosure relates to a yam winding machine and a
5 yam threading method.
BACKGROUND
[0002] In a yam winding machine such as a spinning machine, for
example, after a fully-wound package has been discharged from a
winding device by a doffing carrier, a supply device provided to the
10 doffing carrier may supply a bobbin to a pair of bobbin holders provided
to the winding device, and also, a yam threading device provided to the
doffing carrier may thread yam onto the bobbin (see Japanese
Unexamined Patent Publication No. 2006-225092, for example).
SUMMARY
15 [0003] In the above-described yam winding machine, if some error has
occurred in a series of operations from when a bobbin is supplied to the
pair of bobbin holders until a predetermined amount of yam is wound
around the bobbin, this series of operations may be performed again
from a point when a new empty bobbin is supplied to the pair of bobbin
20 holders. This is because there is a possibility that unnecessary yam
might have been wound around the current bobbin that has been
supplied to the pair of bobbin holders before the occurrence of the error.
However, if the series of operations is performed again for all cases, an
operator has to collect the current bobbin every time an error occurs,
25 which increases load on the operator. Furthermore, every time an error
occurs, a certain period of time is required for replacing the bobbin, and
l

the operating rate decreases accordingly.
[0004] It is an object of the present disclosure to provide a yam winding
machine and a yam threading method with which even if an error has
occurred in a series of operations from when a bobbin is supplied to a
5 pair of bobbin holders until a predetermined amount of yam is wound
around the bobbin, load on an operator related to recovery from the
error can be reduced and decrease in operating rate caused by the
recovery from the error can be reduced.
[0005] A yam winding machine according to one aspect of the present
10 disclosure includes: a winding device including a pair of bobbin holders
configured to hold a bobbin and a cradle configured to support the pair
of bobbin holders; an operating device configured to operate the cradle
to open and close the pair of bobbin holders; a supply device configured
to supply the bobbin to the pair of bobbin holders; a yarn threading
15 device configured to catch yam and thread the yam onto the bobbin; and
a control unit configured to control the operating device, the supply
device, and the yam threading device. The control unit is configured
to perform a first control when a first-type error that occurs after a
catching operation of the yam threading device to catch the yam has
20 been detected in a state in which a first bobbin as the bobbin has been
supplied to the pair of bobbin holders, the first control performed to
control the operating device, the supply device, and the yam threading
device such that the first bobbin is discharged from the pair of bobbin
holders, a second bobbin as the bobbin is supplied to the pair of bobbin
25 holders, and the yam is threaded onto the second bobbin. The control
unit is configured to perform a second control when a second-type error
that occurs before the catching operation or during the catching
operation has been detected in a state in which the first bobbin has been
supplied to the pair of bobbin holders, the second control performed to
control the operating device, the supply device, and the yam threading
5 device such that the yam is threaded onto the first bobbin while the state
in which the first bobbin has been supplied to the pair of bobbin holders
is being maintained.
[0006] In this yam winding machine, depending on the type of an error
that has occurred in a series of operations from when a bobbin is
10 supplied to the pair of bobbin holders until a predetermined amount of
yam is wound around the bobbin, details of operation for recovery from
the error are changed. Specifically, when the first-type error that
occurs after a catching operation of the yam threading device to catch
yam has been detected, the first bobbin is discharged from the pair of
15 bobbin holders, the second bobbin is supplied to the pair of bobbin
holders, and the yam is threaded onto the second bobbin because
unnecessary yam is more likely to have been wound around the first
bobbin that has been supplied to the pair of bobbin holders. Thus, the
bobbin can be replaced without intervention of an operator, and this
20 replacement of the bobbin can prevent a package, including unnecessary
yam, from being formed. Furthermore, when the second-type error
that occurs before the catching operation of the yam threading device to
catch yam or during the catching operation has been detected, yam is
threaded onto the first bobbin while the state in which the first bobbin
25 has been supplied to the pair of bobbin holders is being maintained,
because unnecessary yam is less likely to have been wound around the
first bobbin that has been supplied to the pair of bobbin holders. Thus,
a period of time required for recovery from the error can be shortened
by a period of time required for replacing the bobbin. As described
above, with this yarn winding machine, even if an error has occurred in
5 a series of operations from when a bobbin is supplied to the pair of
bobbin holders until a predetermined amount of yarn is wound around
the bobbin, load on the operator related to recovery from the error can
be reduced and decrease in operating rate caused by the recovery from
the error can be reduced.
I 0 [0007] The yam winding machine according to one aspect of the
present disclosure may further include: a bobbin collection section
configured to collect the first bobbin discharged from the pair of bobbin
holders when the first-type error has been detected; and a bobbin
holding device configured to hold the second bobbin to be supplied to
15 the pair of bobbin holders when the first-type error has been detected.
The supply device may be configured to receive the first bobbin from
the pair of bobbin holders and pass the first bobbin to the bobbin
collection section, and to receive the second bobbin from the bobbin
holding device and pass the second bobbin to the pair of bobbin holders,
20 when the first-type error has been detected. This eliminates the need
to provide a device configured to receive the first bobbin from the pair
of bobbin holders and pass the first bobbin to the bobbin collection
section in addition to the supply device, and thus, the configuration can
be simplified.
25 [0008] In the yarn winding machine according to one aspect of the
present disclosure, the supply device may include a clamping unit
configured to clamp the bobbin, and may be configured such that the
clamping unit is movable between a first position and a second position,
and the clamping unit is movable between the first position and a third
position. The first position is a standby position of the clamping unit,
5 the second position is a position for passing the bobbin to the pair of
bobbin holders and receiving the bobbin from the pair of bobbin
holders, and the third position is a position for passing the bobbin to the
bobbin collection section. The bobbin holding device may be
configured to be movable between a fourth position and a fifth position.
10 The fourth position is a position on a track of the clamping unit between
the first position and the second position, and the fifth position is a
position off the track of the clamping unit between the first position and
the second position. With this configuration, the layouts of the bobbin
holding device, the bobbin collection section, and the supply device can
15 be simplified, and also the movement paths of the bobbin holding
device and the supply device can be simplified.
[0009] In the yarn winding machine according to one aspect of the
present disclosure, the track of the clamping unit between the first
position and the third position may pass through an area above the
20 fourth position and the fifth position in a height direction. With this
configuration, the layouts of the bobbin holding device, the bobbin
collection section, and the supply device can be further simplified, and
also the movement paths of the bobbin holding device and the supply
device can be further simplified.
25 [0010] In the yarn winding machine according to one aspect of the
present disclosure, the bobbin collection section may comprise a
conveyor configured to convey the first bobbin. With this
configuration, the first bobbin can be automatically conveyed to a
predetermined location.
[0011] In the yarn winding machine according to one aspect of the
5 present disclosure, the bobbin collection section may comprise a stocker
configured to store the first bobbin. With this configuration, the first
bobbin can be collected without using the conveyor or the like, and the
first bobbin stored in the stocker can be automatically discharged to a
collection box, for example, provided in a predetermined location or can
10 be collected by the operator.
[0012] The yarn winding machine according to one aspect of the
present disclosure may further include: a first sensor configured to
detect whether the yarn has been caught by the yarn threading device;
and a second sensor configured to detect whether the yarn is being
15 wound by the winding device. The control unit may be configured to
perform the first control when the first sensor has detected that the yarn
has been caught and then the second sensor has detected that the yarn is
not being wound, as being a case where the first-type error has been
detected. When the first sensor has detected that the yarn has been
20 caught and then the second sensor has detected that the yarn is not being
wound, unnecessary yarn is more likely to have been wound around the
first bobbin that has been supplied to the pair of bobbin holders. Thus,
in this case, by controlling the operating device, the supply device, and
the yarn threading device as being the case where the first-type error has
25 been detected, the bobbin can be replaced without intervention of the
operator, and this replacement of the bobbin can prevent a package
including unnecessary yam from being formed.
[0013) The yam winding machine according to one aspect of the
present disclosure may further include: an air spinning device
configured to twist a fiber bundle using swirling airflow to form the
5 yam; and a third sensor configured to detect whether the yam has been
spun out from the air spinning device. The control unit may be
configured to perform the second control when the third sensor has
detected that the yam has not been spun out, as being a case where the
second-type error has been detected. When the third sensor has
1 0 detected that the yam has not been spun out, unnecessary yam is less
likely to have been wound around the first bobbin that has been supplied
to the pair of bobbin holders. Thus, in this case, by controlling the
operating device, the supply device, and the yam threading device as
being the case where the second-type error has been detected, a period
15 of time required for recovery from the error can be shortened by a
period oftime required for replacing the bobbin.
[0014) In the yam winding machine according to one aspect of the
present disclosure, the control unit may be configured to perform the
second control when the third sensor has detected that the yam has been
20 spun out and then the first sensor has detected that the yam has not been
caught, as being the case where the second-type error has been detected.
When the third sensor has detected that the yam has been spun out and
then the first sensor has detected that the yam has not been caught,
unnecessary yam is less likely to have been wound around the first
25 bobbin that has been supplied to the pair of bobbin holders. Thus, in
this case, by controlling the operating device, the supply device, and the
yam threading device as being the case where the second-type error has
been detected, a period of time required for recovery from the error can
be shortened by a period of time required for replacing the bobbin.
[0015] In the yam winding machine according to one aspect of the
5 present disclosure, the winding device may be disposed at a position for
winding the yam traveling upward from a lower side. With this
configuration, even if the position of the winding device is high,
recovery from the error is automatically made, which can prevent
decrease in the operating rate of the yam winding machine due to work
10 of the operator at a high place.
[0016) A yam threading method according to one aspect of the present
disclosure is a yam threading method that is performed in a yam
winding machine including: a winding device including a pair of bobbin
holders configured to hold a bobbin and a cradle configured to support
15 the pair of bobbin holders; an operating device configured to operate the
cradle to open and close the pair of bobbin holders; a supply device
configured to supply the bobbin to the pair of bobbin holders; and a
yam threading device configured to catch yam and thread the yam onto
the bobbin. The yam threading method includes: a step of, when a
20 first-type error that occurs after catching operation of the yam threading
device to catch the yam has been detected in a state in which a first
bobbin as the bobbin has been supplied to the pair of bobbin holders,
discharging the first bobbin from the pair of bobbin holders, supplying a
second bobbin as the bobbin to the pair of bobbin holders, and threading
25 the yam onto the second bobbin; and a step of, when a second-type error
that occurs before the catching operation or during the catching
operation has been detected in a state in which the first bobbin has been
supplied to the pair of bobbin holders, threading the yam onto the first
bobbin while maintaining the state in which the first bobbin has been
supplied to the pair of bobbin holders.
5 [00 17] With this yam threading method, similarly to the
above-described yam winding machine, even if an error has occurred in
a series of operations from when a bobbin is supplied to the pair of
bobbin holders until a predetermined amount of yam is wound around
the bobbin, load on the operator related to recovery from the error can
1 0 be reduced and decrease in operating rate caused by the recovery from
the error can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Fig. 1 is a side view of a spinning machine as one embodiment
of a yam winding machine of the present disclosure.
15 • [00 19] Fig. 2 is a front view of a winding device illustrated in Fig. 1.
[0020] Fig. 3 is a side view of the spinning machine for describing
operation of the spinning machine illustrated in Fig. 1.
[0021] Fig. 4 is a side view ofthe spinning machine for describing the
operation of the spinning machine illustrated in Fig. 1.
20 [0022] Fig. 5 is a side view of the spinning machine for describing the
operation of the spinning machine illustrated in Fig. 1.
[0023] Fig. 6 is a side view of the spinning machine for describing the
operation of the spinning machine illustrated in Fig. 1.
[0024] Fig. 7 is a side view of the spinning machine for describing the
25 operation of the spinning machine illustrated in Fig. 1.
[0025] Fig. 8 is a side view of the spinning machine for describing the
operation of the spinning machine illustrated in Fig. 1.
[0026] Fig. 9 is a side view of the spinning machine for describing the
operation of the spinning machine illustrated in Fig. 1.
[0027] Fig. 10 is a side view of the spinning machine for describing the
5 operation of the spinning machine illustrated in Fig. 1.
[0028) Fig. 11 is a block diagram of a configuration related to a control
unit illustrated in Fig. I.
[0029) Fig. 12 is a side view of part of the spinning machine illustrated
in Fig. 1.
10 [0030) Fig. 13 is a side view of a supply device for describing operation
of a doffing carrier illustrated in Fig. 1.
[0031] Fig. 14 is a side view of the supply device for describing the
operation of the doffing carrier illustrated in Fig. 1.
[0032] Fig. 15 is a side view of the supply device for describing the
15 operation of the doffing carrier illustrated in Fig. 1.
[0033) Fig. 16 is a side view of the supply device for describing the
operation ofthe doffing carrier illustrated in Fig. 1.
[0034) Fig. 17 is a side view of the supply device for describing the
operation of the doffmg carrier illustrated in Fig. 1.
20 [0035) Fig. 18 is a side view of the supply device for describing the
operation of the doffing carrier illustrated in Fig. 1.
[0036) Fig. 19 is a side view of the supply device for describing the
operation of the doffing carrier illustrated in Fig. 1.
DETAILED DESCRIPTION
25 [0037] An embodiment of the present disclosure will now be described
in detail with reference to the drawings. In the drawings, like or
equivalent elements are designated by like numerals, and duplicate
description is omitted.
[Configuration of Spinning Machine]
[0038] As illustrated in Fig. 1, a spinning machine (yam winding
5 machine) 1 includes a plurality of spinning units (yam winding units) 2,
a doffing carrier 10, and a control unit 100. The spinning units 2 are
aligned in a row. Each spinning unit 2 drafts a sliver (fiber bundle) S
to fonn a fiber bundle F, twists the fiber bundle F using swirling airflow
to form yam Y, and winds the yam Y around a bobbin B to form a
10 package P. The doffing carrier 10 is movable along a direction in
which the spinning units 2 are aligned. When a fully-wound package P
has been formed in a certain spinning unit 2, the doffing carrier 10
discharges the fully-wound package P from the spinning unit 2, and
supplies an empty bobbin B to the spinning unit 2. The control unit
15 100 controls operation of the spinning machine 1. The control unit
100 is configured with a machine control device and a plurality of unit
controllers, for example. The machine control device is a host
controller of the unit controllers. Each unit controller is provided for
every predetermined number of (one or more) spinning units 2, and
20 controls operation of each spinning unit 2.
[0039] Hereinafter, the upstream side of the sliverS, the fiber bundle F,
and the yam Yin their traveling direction is called "upstream side", and
the downstream side in the traveling direction is called "downstream
side". One side in a horizontal direction orthogonal to the direction in
25 which the spinning units 2 are aligned (e.g., working passage side) is
called "front side", and the other side in the horizontal direction is called
"rear side". The upper side in the vertical direction is called "upper
side", and the lower side in the vertical direction is called "lower side".
[0040] Each spinning unit 2 includes, in the order from the upstream
side toward the downstream side, a drafting device 3, an air spinning
5 device 4, a yarn monitoring device 5, a yam storage device 6, a yam
joining device 7, and a winding device 20. The spinning unit 2 further
includes a first catching-and-guiding device 8 and a second
catching-and-guiding device 9. As one example, the traveling
direction of the sliver S, the fiber bundle F, and the yam Y from the
10 drafting device 3 to the yam storage device 6 is a direction extending
from the front side toward the rear side, and is inclined upward with
respect to the horizontal direction. The traveling direction of the yam
Y from the yam storage device 6 to the winding device 20 is a direction
extending from the lower side toward the upper side, and is inclined
15 forward with respect to the vertical direction. In each spinning unit 2,
the traveling direction of the yarn Y is turned at the yam storage device
6.
[0041] The drafting device 3 drafts the sliver S to form the fiber bundle
F, and feeds the fiber bundle F to the air spinning device 4. The
20 drafting device 3 includes a plurality of roller pairs aligned from the
upstream side toward the downstream side and apron belts wound
around the respective rollers of a predetermined roller pair. The air
spinning device 4 twists the fiber bundle F from the drafting device 3
using swirling airflow to form the yam Y.
25 [0042] The yam monitoring device 5 monitors information on traveling
the yarn Y to detect the presence or absence of a yam defect on the basis
of the monitored information. When having detected a yam defect, the
yam monitoring device 5 transmits a yam-defect detection signal to the
control unit l 00. When having received the yam-defect detection
signal, in order to cut the yam Y, the control unit 100 causes the drafting
5 device 3 and the air spinning device 4 to stop operating such that supply
of the yam Y is stopped. When having received the yam-defect
detection signal, in order to cut the yam Y, the control unit l 00 may
cause a cutter provided to the yam monitoring device 5, for example, to
operate.
10 [0043] The yam storage device 6 includes a yam storage roller 61 and a
yam hooking member 62. The yam storage roller 61 is rotated by an
electric motor (not illustrated). The yam hooking member 62 is
attached to a downstream end portion of the yam storage roller 61, and
is rotatable relative to the yam storage roller 61. Herein, magnetic
15 force that interferes with rotation relative to the yam storage roller 61
acts on the yam hooking member 62. Thus, when a tension equal to or
higher than a predetermined value is not applied to the yam Y, the yam
hooking member 62 rotates together with the yam storage roller 61,
whereby the yam Y is wound (stored) around the yam storage roller 61.
20 When a tension equal to or higher than the predetermined value is
applied to the yam Y, the yam hooking member 62 rotates relative to the
yam storage roller 61, whereby the yam Y is unwound from the yam
storage roller 61. The yam storage device 6 stores the yam Yin this
manner, thereby absorbing variation in tension applied to the yam Y on
25 the downstream side of the yam storage device 6, and stably drawing
out the yam Y from the air spinning device 4.
[0044] On the upstream side of the yam storage device 6, a first guide
63 is disposed. The first guide 63 guides the yam Y traveling from the
upstream side to the yam storage device 6. The first guide 63 is
movable, and draws the yam Y from the air spinning device 4 toward
5 the yam storage device 6 when yam joining is performed, for example.
On the downstream side of the yam storage device 6, a second guide 64,
a third guide 65, and a fourth guide 66 are disposed. The second guide
64 and the third guide 65 guide the yam Y traveling from the yam
storage device 6 to the downstream side. The second guide 64 is
10 movable, and can guide the yam Y to the third guide 65. The fourth
guide 66 is movable, and hooks the yam Y onto the yam hooking
member 62 and unhooks the yam Y from the yam hooking member 62.
[0045] When the yam Y has been cut or the yam Y has broken for some
reason, the yam joining device 7 joins the yam Y from the air spinning
15 device 4 and the yam Y from a package P. The yam joining device 7 is
a splicer device configured to twist yam ends together using swirling
airflow. Herein, the yam joining device 7 may be a mechanical
knotter, for example. Each of the first catching-and-guiding device 8
and the second catching-and-guiding device 9 is swingable about its
20 base-end portion. When yam joining is to be performed, the first
catching-and-guiding device 8 swings downward to catch the yam Y
from the air spinning device 4 using suction airflow, and then swings
upward to guide the yam Y from the air spinning device 4 to the yam
joining device 7. When the yam joining is to be performed, the second
25 catching-and-guiding device 9 swings upward to catch the yam Y from
the package P using suction airflow, and then swings downward to
guide the yam Y from the package P to the yam joining device 7.
[0046] The winding device 20 winds the yam Y, drawn out by the yam
storage device 6, around a bobbin B to form a package P. As
illustrated in Fig. 1 and Fig. 2, the winding device 20 includes a drum
5 23, a first bobbin holder 21 and a second bobbin holder 22 as a pair of
bobbin holders, and a cradle 24. On the upstream side of the winding
device 20, a fifth guide 26 is disposed. The fifth guide 26 guides the
yarn Y traveling from the upstream side to the drum 23. Although an
empty bobbin B around which the yam Y is not wound is illustrated in
10 Fig. 2, the respective components of the winding device 20 function in
the same manner also for a package P (see Fig. 1) with the yarn Y
wound around the bobbin B.
[0047] The drum 23 rotates the bobbin B while making contact with the
bobbin B. When the yam Y is being wound around the bobbin B, the
15 drum 23 rotates the package P while being in contact with the package
P. The drum 23 is rotatably supported by the frame 25, and is rotated
about a rotation axis L1 by a drum driving section (not illustrated)
provided to each spinning unit 2. In other words, each spinning unit 2
includes the drum driving section configured to drive the drum 23. On
20 a surface of the drum 23, a traverse groove (not illustrated) is formed.
By this traverse groove, the yam Y is traversed when the yarn Y is
wound around the bobbin B. Herein, instead of forming the traverse
groove on the surface of the drum 23, the yam Y may be traversed by an
additionally provided traversing device when the yam Y is wound
25 around the bobbin B.
[0048] The first bobbin holder 21 holds an end portion B 1 of the bobbin
B, and the second bobbin holder 22 holds an end portion B2 of the
bobbin B. The pair of bobbin holders 21, 22 holds both end portions
of the bobbin B in this manner, thereby holding the bobbin B. The
cradle 24 rotatably supports the pair of bobbin holders 21, 22 in a
5 manner that the pair of bobbin holders 21, 22 can be opened and closed
and the pair of bobbin holders 21, 22 can be moved with respect to the
drum 23. The cradle 24 is swingable about a swinging axis L2. The
cradle 24 swings about the swinging axis L2, thereby absorbing an
increase in diameter of the package P associated with winding of the
10 yarn Y around the bobbin B.
[0049] The cradle 24 includes a cradle arm 24a. The cradle arm 24a is
attached to a portion of the cradle 24 that supports the second bobbin
holder 22. By operating the cradle arm 24a, the pair of bobbin holders
21, 22 can be opened and closed. Specifically, by operating the cradle
15 arm 24a such that the second bobbin holder 22 is separated from the
first bobbin holder 21 to swing outward the portion of the cradle 24 that
supports the second bobbin holder 22, the pair of bobbin holders 21, 22
that is urged so as to hold the bobbin B can be opened. In other words,
the distance between the pair of bobbin holders 21, 22 when the pair of
20 bobbin holders 21, 22 is opened is larger than the distance between the
pair of bobbin holders 21, 22 when the pair of bobbin holders 21, 22 is
closed.
[0050] By operating the cradle arm 24a, the pair of bobbin holders 21,
22 can be moved with respect to the drum 23. Specifically, by
25 operating the cradle arm 24a such that the pair of bobbin holders 21, 22
is separated from the drum 23 to swing the cradle 24 about the swinging
axis L2, the bobbin B or the package P can be moved apart from the
drum23.
[0051) As illustrated in Fig. 1, the doffing carrier 10 includes a frame
11, an operating device 12, a discharge device (not illustrated), a supply
5 device 30, a bobbin holding device 14, a bobbin stocker 15, a pressing
device 16, and a yam threading device 17. The frame 11 supports the
operating device 12, the discharge device, the supply device 30, the
bobbin holding device 14, the bobbin stocker 15, the pressing device 16,
and the yam threading device 17.
10 [Configuration and Operation ofDoffing Carrier]
[0052) The following describes a configuration and operation of each
component of the doffing carrier 10 with reference to Fig. 3 to Fig. 10.
Although the control unit 100 is not illustrated in Fig. 3 to Fig. 10,
operation of each component of the doffing carrier 10 is controlled by
15 the control unit 100.
[0053] As illustrated in Fig. 3, when a fully-wound package P has been
formed by the winding device 20, operations of the drafting device 3
and the air spinning device 4 are stopped to stop supply of the yam Y,
and the drum driving section is stopped to stop rotation of the drum 23.
20 At this time, the first guide 63 and the second guide 64 move to
positions apart from the yam storage roller 61 and the yam hooking
member 62. Subsequently, the operating device 12 holds the cradle
arm 24a and operates the cradle arm 24a. By this operation, the pair of
bobbin holders 21, 22 is moved to a discharge position as illustrated in
25 Fig. 4. The discharge position is a position where the fully-wound
package P is located away from the drum 23. In this manner, the
operating device 12 operates the cradle 24 such that the pair of bobbin
holders 21, 22 moves with respect to the drum 23.
[0054] Subsequently, as illustrated in Fig. 5, the operating device 12
operates the cradle arm 24a to open the pair of bobbin holders 21, 22,
5 and the discharge device discharges the fully-wound package P from the
pair of bobbin holders 21, 22 positioned at the discharge position. In
this manner, the operating device 12 operates the cradle 24 such that the
pair of bobbin holders 21, 22 is opened and closed. Subsequently, as
illustrated in Fig. 6, the operating device 12 operates the cradle arm 24a
10 to move the pair of bobbin holders 21, 22 to a supply position. The
supply position is a position that is closer to the drum 23 than the
discharge position (see Fig. 4 and Fig. 5) is.
[0055] Subsequently, as illustrated in Fig. 7, the bobbin holding device
14 passes an empty bobbin B stored in the bobbin stocker 15 to the
15 supply device 30, and the supply device 30 supplies, from the upper
side, the empty bobbin B to the pair of bobbin holders 21, 22 that is
positioned at the supply position and is opened (see Fig. 2).
Subsequently, the operating device 12 operates the cradle arm 24a to
close the pair of bobbin holders 21, 22, so that the first bobbin holder 21
20 holds the end portion B 1 of the bobbin B and the second bobbin holder
22 holds the end portion B2 of the bobbin B. Subsequently, as
illustrated in Fig. 8, the operating device 12 operates the cradle arm 24a
to move the pair of bobbin holders 21, 22 to a yarn threading position.
The yam threading position is a position that is closer to the drum 23
25 than the supply position (see Fig. 6 and Fig. 7) is, and is a position
where the bobbin B held by the pair of bobbin holders 21,22 comes into
contact with the drum 23.
[0056] The pair of bobbin holders 21, 22 is moved to the yarn threading
position and, operations of the drafting device 3 and the air spinning
device 4 are started to start (restart) supply of the yarn Y. At this time,
5 the first catching-and-guiding device 8 that has swung downward
catches the yarn Y from the air spinning device 4 using suction airflow,
and then the first catching-and-guiding device 8 swings upward to guide
the yarn Y from the air spinning device 4 to the yarn joining device 7.
Subsequently, the first guide 63 moves closer to the yarn storage roller
10 61, whereby the yarn Y from the air spinning device 4 is drawn toward
the yarn storage device 6. Furthermore, the second guide 64 moves
closer to the yarn hooking member 62, whereby the yarn Y from the air
spinning device 4 is hooked on the yarn hooking member 62. Thus,
the yarn Y from the air spinning device 4 is wound around the yarn
15 storage roller 61.
[0057] Subsequently, as illustrated in Fig. 9, when the pair of bobbin
holders 21, 22 is positioned at the yarn threading position, the pressing
device 16 presses the bobbin B held by the pair of bobbin holders 21, 22
against the drum 23. The pressing device 16 has a contact portion 16a
20 configured to come into contact with the bobbin B and a moving
mechanism 16b configured to move the contact portion 16a, and the
contact portion 16a is attached to the moving mechanism 16b in a
replaceable manner. The contact portion 16a is replaced depending on
the type of a bobbin B. While the pressing device 16 is pressing the
25 bobbin B against the drum 23, the fourth guide 66 moves so as to
remove the yarn Y from the yarn hooking member 62, whereby the yarn
Y is removed from the yam hooking member 62. Thus, the yam Y is
unwound from the yam storage roller 61, and the unstable yam Y
formed at the start of supplying of the yam Y, is suctioned to be
discarded by the first catching-and-guiding device 8. Subsequently,
5 the yam threading device 17 moves near the yam joining device 7 to
receive the yam Y from the first catching-and-guiding device 8.
Specifically, the yam threading device 17 catches the yam Y drawn out
by the yam storage device 6 using suction airflow.
[0058] Subsequently, as illustrated in Fig. 10, while the pressing device
10 16 is pressing the bobbin B against the drum 23, the operating device 12
operates the cradle arm 24a, whereby a space is formed between the end
portion B2 of the bobbin B and the second bobbin holder 22 (see Fig.
2). Meanwhile, the fourth guide 66 moves to the standby position,
whereby the yam Y from the air spinning device 4 is hooked on the yam
15 hooking member 62. Thus, the yam Y from the air spinning device 4
is wound around the yam storage roller 61. Subsequently, the yam
threading device 17 guides the yam Y to the space formed between the
end portion B2 of the bobbin B and the second bobbin holder 22.
Subsequently, with the yam Y being positioned in the space, the
20 operating device 12 operates the cradle arm 24a to close the pair of
bobbin holders 21, 22, whereby the yam Y is threaded onto the bobbin
B. When the pair of bobbin holders 21, 22 has been closed, the yam
threading device 17 cuts the yam Y between the yam threading device
17 and the bobbin B. In this manner, the yam threading device 17
25 threads the yam Y drawn out by the yam storage device 6 onto the
bobbin B from the lower side with the pair of bobbin holders 21, 22
being opened and closed under a state in which the pair of bobbin
holders 21, 22 is positioned at the yam threading position. When the
yam threading device 17 threads the yam Y onto the bobbin B, the drum
driving section is stopping the rotation of the drum 23.
5 [0059] When the yam Y has been threaded onto the bobbin B, the
operating device 12, the pressing device 16, and the yam threading
device 17 return to the standby positions in the doffing carrier 10, and
the drum driving section is operated to start rotation of the drum 23,
whereby formation of a package P (winding of the yam Y around the
10 bobbin B) by the winding device 20 is started. More specifically, at
the start of forming a package P, the yam Y is restricted by a restriction
guide (not illustrated) provided to the doffing carrier 10 so as not to be
traversed along the traverse groove, and thus, a bunch is wound and
formed on an inner side of the end portion B2 of the bobbin B in the
15 axial direction. After the bunch has been wound and formed, the
restriction of the yam Y by the restriction guide is released, and
formation of the package P is continued. In the spinning machine 1,
each spinning unit 2 includes a draft driving section (not illustrated)
configured to drive the corresponding drafting device 3, and the drafting
20 device 3 operates at a drafting speed depending on a state of the
spinning unit 2. The drafting speed during a winding period for the
winding device 20 to wind the yam Y around the bobbin B (a period of
time from when the winding device 20 starts winding the yam Y around
an empty bobbin B until a fully-wound package P is formed) is higher
25 than the drafting speed during a preparation period (a period of time
between a winding period and the subsequent winding period) other
than the winding period. Herein, the drafting speed is, for example, an
average drafting speed depending on the spinning speed of the air
spinning device 4.
[Recovery from Error that has Occurred After Bobbin is Supplied]
5 [0060) The following describes recovery from an error that has
occurred in a series of operations from when an empty bobbin B is
supplied to the pair of bobbin holders 21, 22 until a predetermined
amount of yam is wound around the bobbin B (hereinafter, also simply
called "error"). As illustrated in Fig. 11, the control unit 100 controls,
10 for recovery from an error, the operating device 12, the supply device
30, the bobbin holding device 14, and the yam threading device 17 on
the basis of detection results of a first sensor 1 01, a second sensor 1 02,
and a third sensor 103. The control unit 100 is configured as a
computer device including a processor, a memory, a storage, and a
15 communication device. The control unit 100 causes the processor to
execute predetermined software (program) read in the memory, for
example, and controls reading and writing of data in the memory and
the storage, and also communication between control devices performed
by the communication device, thereby implementing functions of
20 various types.
[0061] The first sensor 101 detects whether the yam Y has been caught
by the yam threading device 17. The first sensor 101 is, for example, a
sensor configured to detect whether the yam Y is present in the yam
threading device 17 when the yam threading device 17 receives the yam
25 Y from the first catching -and-guiding device 8. The second sensor 1 02
detects whether the yam Y is being wound by the winding device 20.
The second sensor 102 is, for example, a sensor configured to detect
whether the yarn Y is traversed in the winding device 20, a sensor
configured to detect whether the storage amount of the yam Y in the
yam storage roller 61 is smaller than an upper limit, or a sensor
5 configured to detect whether the yarn Y traveling between the yarn
storage device 6 and the winding device 20 is present. The third
sensor 103 detects that the yam Y has been spun out from the air
spinning device 4. The third sensor 103 is, for example, a sensor
configured to detect whether the yam Y traveling between the air
10 spinning device 4 and the yam monitoring device 5 is present, a sensor
configured to detect whether the yam Y is present in the first
catching-and-guiding device 8 when the first catching-and-guiding
device 8 guides the yam Y from the air spinning device 4 to the yarn
joining device 7, or a sensor configured to detect whether the yam Y is
15 present on the downstream side of the yarn storage device 6 when the
unstable yam Y produced at the start of supplying of the yam Y is
suctioned to be discharged by the first catching-and-guiding device 8.
[0062] Before describing recovery from an error, the following
describes a configuration of the supply device 30. As illustrated in
20 Fig. 12, the supply device 30 includes a frame 31, a cam member 32, an
arm 34, a clamping unit 35, a first shaft 36, a second shaft 37, a first
motor 38, and a second motor 39. In Fig. 12 to Fig. 19, the cam
member 32 is indicated by a dashed and double-dotted line.
[0063] The frame 31 is attached to the frame 11 (see Fig. 1) of the
25 doffing carrier 10. The frame 31 supports the cam member 32, the arm
34, the clamping unit 35, the first shaft 36, the second shaft 37, the first
motor 38, and the second motor 39. In the cam member 32, a cam
groove 33 is formed. The cam groove 33 has a base-end portion 33a
and a distal-end portion 33b. The base-end portion 33a is made wider
than a portion of the cam groove 33 except the base-end portion 33a.
5 In the cam groove 33, a cam follower 34a provided to the arm 34 is
arranged.
[0064] The first shaft 36 is provided to a base-end portion of the arm
34, and the clamping unit 35 is attached to a distal-end portion of the
arm 34. The clamping unit 35 is configured to be capable of clamping
10 (gripping, holding) a bobbin B. The first motor 38 is coupled to the
first shaft 36 with a plurality of gears (not illustrated) interposed
therebetween, and swings the arm 34 and the clamping unit 35 together
about the first shaft 36. The second motor 39 is coupled to the second
shaft 37 with a plurality of gears (not illustrated) interposed
15 therebetween, and swings the arm 34, the clamping unit 35, and the first
shaft 36 together about the second shaft 37. When the supply device
30 is in a standby state, the cam follower 34a is positioned on a
receiving portion 33c that is part of the cam groove 33, and the base-end
portion of the arm 34 is positioned on a stopper 31 a provided to the
20 frame 31.
[0065] With this configuration, the clamping unit 35 1s movable
between a first position A1 and a second position A2, and is also
movable between the first position A1 and a third position A3. The
first position A1 is a standby position of the clamping unit 35 when the
25 supply device 30 is in the standby state. The second position A2 is a
position for passing a bobbin B to the pair of bobbin holders (21, 22)
and receiving a bobbin B from the pair of bobbin holders 21, 22. The
third position A3 is a position for passing a bobbin B to a conveyor 18.
[0066] The conveyor 18 extends along the direction in which the
spinning units 2 are aligned, and conveys a bobbin B to be stored in the
5 bobbin stocker 15 from a bobbin supply device (not illustrated) to the
doffmg carrier 10, and also conveys a bobbin B, discharged from the
pair of bobbin holders 21, 22, from the doffing carrier 10 to a collection
box provided to the opposite side of the bobbin supply device. In this
manner, the conveyor 18 functions as a bobbin collection section
10 configured to collect a bobbin B discharged from the pair of bobbin
holders 21, 22.
[0067] The bobbin holding device 14 can move between a fourth
position A4 and a fifth position A5 while holding, on the bobbin stocker
15, a bobbin B to be supplied to the pair of bobbin holders 21, 22. The
15 fourth position A4 is a position on a track of the clamping unit 35
between the first position A1 and the second position A2. The fifth
position A5 is a position off the track of the clamping unit 35 between
the first position A1 and the second position A2 (a position posterior to
the fourth position A4 in the present embodiment). A track of the
20 clamping unit 35 between the first position A1 and the third position A3
passes through an area above the fourth position A4 and the fifth
position A5 in a machine height direction (height direction) that is a
vertical direction.
[0068] The supply device 30 is controlled by the control unit 100 to
25 supply an empty bobbin B to the pair of bobbin holders 21, 22 as
described below. To begin with, as illustrated in Fig. 13, the second
motor 39 swings the arm 34, the clamping unit 35, and the first shaft 36
together about the second shaft 37. Thus, the cam follower 34a moves
upward to be disengaged from the receiving portion 33c of the cam
groove 33. Subsequently, as illustrated in Fig. 14, the first motor 38
5 swings the arm 34 and the clamping unit 35 together about the first shaft
36. Accordingly, the cam follower 34a moves in the base-end portion
33a of the cam groove 33, and the clamping unit 35 moves from the first
position Al to the second position A2 via the fourth position A4. At
this time, the clamping unit 35 receives a bobbin B from the bobbin
10 holding device 14 at the fourth position A4, and passes the bobbin B to
the pair of bobbin holders 21, 22 at the second position A2.
[0069] The following describes the operation of each component of the
doffmg carrier 10 at the time of recovery from an error with reference to
Fig. 15 to Fig. 19. As described above, the error is an error that has
15 occurred in a series of operations from when an empty bobbin B is
supplied to the pair of bobbin holders 21, 22 until a predetermined
amount of yarn is wound around the bobbin B. In the following
description, a bobbin B that has been supplied to the pair of bobbin
holders 21, 22 is called "first bobbin B", and an empty bobbin B to be
20 supplied to the pair of bobbin holders 21, 22 is called "second bobbin
B".
[0070) In a state in which the first bobbin B has been supplied to the
pair of bobbin holders 21, 22, when a first-type error that occurs after
catching operation of the yam threading device 17 to catch the yam Y
25 (hereinafter, also simply called "first-type error") has been detected, the
control unit 100 controls the respective components of the doffing
carrier 10 as described below to make recovery from the first-type error.
[0071] To begin with, as illustrated in Fig. IS, the bobbin holding
device 14 holding the second bobbin B moves from the fourth position
A4 to the fifth position AS. Subsequently, the clamping unit 3S moves
S from the first position Al to the second position A2 via the fourth
position A4, and the clamping unit 3S receives the first bobbin B from
the pair of bobbin holders 21, 22 at the second position A2.
Operations of the respective components when the clamping unit 3S
moves from the first position Al to the second position A2 via the
10 fourth position A4 are the same as the operations of the respective
components as illustrated in Fig. 13 and Fig. 14.
[0072] Subsequently, as illustrated in Fig. 16, the first motor 38 swings
the arm 34 and the clamping unit 3S together about the first shaft 36.
Accordingly, the cam follower 34a moves in the base-end portion 33a of
IS the cam groove 33, and the clamping unit 3S holding the first bobbin B
moves from the second position A2 to the first position Al via the
fourth position A4.
[0073] Subsequently, as illustrated in Fig. 17, the bobbin holding device
14 holding the second bobbin B moves from the fifth position AS to the
20 fourth position A4. Subsequently, as illustrated in Fig. 17, Fig. 18, and
Fig. 19, the second motor 39 swings the arm 34, the clamping unit 3S,
and the first shaft 36 about the second shaft 37. Accordingly, the cam
follower 34a moves along the cam groove 33 to the distal-end portion
33b, and the clamping unit 3S holding the first bobbin B moves from the
2S second position A2 to the third position A3 while passing through an
area above the fourth position A4 and the fifth position AS.
Subsequently, the clamping unit 35 passes the bobbin B to the conveyor
18 at the third position A3.
[0074] Subsequently, the clamping unit 35 returns to the first position
AI, and supplies the second bobbin B to the pair of bobbin holders 21,
5 22 as illustrated in Fig. 13 and Fig. 14. Thereafter, as described above,
by the operating device 12 and the yam threading device 17, for
example, the yam Y is threaded onto the second bobbin B supplied to
the pair of bobbin holders 21, 22 (see Fig. 8, Fig. 9, and Fig. 10).
[0075] As described above, when a first-type error has been detected,
10 the control unit 100 controls the respective components of the doffing
carrier 10 such that the first bobbin B is discharged from the pair of
bobbin holders 21, 22, the second bobbin B is supplied to the pair of
bobbin holders 21, 22, and the yarn Y is threaded onto the second
bobbin B, thereby making recovery from the first-type error. Herein,
15 when the first sensor 101 has detected that the yam Y has been caught
and then the second sensor 1 02 has detected that the yarn Y has not been
wound, the control unit 100 controls the respective components of the
doffmg carrier 10 as being a case where the first-type error has been
detected. The first-type error is such an error that, for example, the
20 yam Y fails to be caught between the end portion B2 of the first bobbin
B and the second bobbin holder 22 (see Fig. 2) or the yam Y
immediately breaks after being caught therebetween, and is an error in
which unnecessary yam Y is more likely to have been wound around the
first bobbin B.
25 [0076] In a state in which the first bobbin B has been supplied to the
pair of bobbin holders 21, 22, when a second-type error that occurs
before catching operation of the yarn threading device 17 to catch the
yam Y or during the catching operation (hereinafter, also simply called
"second-type error") has been detected, the control unit 100 controls the
respective components of the doffing carrier 10, such that the yarn Y is
5 threaded onto the first bobbin B as a retrial, while the state in which the
first bobbin B has been supplied to the pair of bobbin holders 21, 22 is
being maintained to make recovery from the second-type error.
Herein, when the third sensor 1 03 has detected that the yam Y has not
been spun out, the control unit 100 controls the respective components
1 0 of the doffing carrier 10 as being a case where the second-type error has
been detected. When the third sensor 103 has detected that the yam Y
has been spun out and then the first sensor 10 1 has detected that the
yam Y has not been caught, the control unit 100 controls the respective
components of the doffing carrier 10 as being the case where the
15 second-type error has been detected. The second-type error is such an
error that, for example, the air spinning device 4 fails to spin the yam Y
or the yarn threading device 17 fails to receive the yarn Y from the first
catching-and-guiding device 8, and is an error in which unnecessary
yam Y is less likely to have been wound around the first bobbin B.
20 [Functions and Effects]
[0077] As described above, in the spinning machine 1, depending on
the type of an error that has occurred in a series of operations from
when a bobbin B is supplied to the pair of bobbin holders 21, 22 until a
predetermined amount of the yarn Y is wound around the bobbin B,
25 details of operation for recovery from the error are changed.
Specifically, when a first-type error that occurs after catching operation
of the yam threading device 17 to catch the yam Y has been detected,
the first bobbin B is discharged from the pair of bobbin holders 21, 22,
the second bobbin B is supplied to the pair of bobbin holders 21, 22, and
also the yam Y is threaded onto the second bobbin B because
5 unnecessary yam Y is more likely to have been wound around the first
bobbin B that has been supplied to the pair of bobbin holders 21, 22.
Thus, the bobbin B can be replaced without intervention of an operator,
and this replacement of the bobbin B can prevent a package P including
unnecessary yam Y from being formed. Furthermore, when a
10 second-type error that occurs before the catching operation of the yam
threading device 17 to catch the yam Y or during the catching operation
has been detected, the yam Y is threaded onto the first bobbin B while
the state in which the first bobbin B has been supplied to the pair of
bobbin holders 21, 22 is being maintained because unnecessary yam Y
15 is less likely to have been wound around the first bobbin B that has been
supplied to the pair of bobbin holders 21, 22. Thus, a period of time
required for recovery from the error can be shortened by a period of
time required for replacing the bobbin B. As described above, with the
spinning machine 1, even if an error has occurred in a series of
20 operations from when a bobbin B is supplied to the pair of bobbin
holders 21, 22 until a predetermined amount of the yam Y is wound
around the bobbin B, load on the operator related to recovery from the
error can be reduced and decrease in operating rate caused by the
recovery from the error can be reduced.
25 [0078] In the spinning machine 1, when the first-type error has been
detected, the supply device 30 receives the first bobbin B from the pair
of bobbin holders 21, 22 and passes the first bobbin B to the conveyor
18, and receives the second bobbin B from the bobbin holding device 14
and passes the second bobbin B to the pair of bobbin holders 21, 22.
This eliminates the need to provide a device configured to receive the
5 first bobbin B from the pair of bobbin holders 21, 22 and pass the first
bobbin B to the conveyor 18 in addition to the supply device 30, and
thus, the configuration can be simplified.
[0079] In the spinning machine 1, the supply device 30 is configured
such that the clamping unit 35 is movable between the first positionAl
10 and the second position A2, and also the clamping unit 35 is movable
between the first position Al and the third position A3. The bobbin
holding device 14 is configured to be movable between the fourth
position A4 and the fifth position A5. Thus, the layouts ofthe bobbin
holding device 14, the conveyor 18, and the supply device 30 can be
15 simplified, and also the movement paths of the bobbin holding device
14 and the supply device 30 can be simplified.
[0080) In the spinning machine 1, the track of the clamping unit 35
between the first positionAl and the third position A3 passes through
the area above the fourth position A4 and the fifth position A5 in the
20 machine height direction. Thus, the layouts of the bobbin holding
device 14, the conveyor 18, and the supply device 30 can be further
simplified, and also the movement paths of the bobbin holding device
14 and the supply device 30 can be further simplified.
[0081] In the spinning machine 1, the bobbin collection section
25 configured to collect the first bobbin B discharged from the pair of
bobbin holders 21, 22 is configured as the conveyor 18 configured to
convey the first bobbin B. Thus, the first bobbin B can be
automatically conveyed to a predetermined location.
[0082) In the spinning machine 1, when the first sensor 101 has
detected that the yam Y has been caught and then the second sensor 1 02
5 has detected that the yam Y is not being wound, the control unit 100
controls the operating device 12, the supply device 30, and the yam
threading device 17 as being the case where the first-type error has been
detected. When the first sensor 10 1 has detected that the yam Y has
been caught and then the second sensor 102 has detected that the yam Y
1 0 is not being wound, unnecessary yam Y is more likely to have been
wound around the first bobbin B that has been supplied to the pair of
bobbin holders 21, 22. Thus, in this case, by controlling the operating
device 12, the supply device 30, and the yam threading device 17 as
being the case where the first-type error has been detected, the bobbin B
15 can be replaced without intervention of the operator, and this
replacement of the bobbin B can prevent a package P including
unnecessary yam Y from being formed.
[0083) In the spinning machine 1, when the third sensor 103 has
detected that the yam Y has not been spun out, the control unit 100
20 controls the operating device 12, the supply device 30, and the yam
threading device 17 as being the case where the second-type error has
been detected. When the third sensor 103 has detected that the yam Y
has not been spun out, unnecessary yam Y is less likely to have been
wound around the first bobbin B that has been supplied to the pair of
25 bobbin holders 21, 22. Thus, in this case, by controlling the operating
device 12, the supply device 30, and the yam threading device 17 as
being the case where the second-type error has been detected, a period
of time required for recovery from the error can be shortened by a
period of time required for replacing the bobbin B. Furthermore, for
example, after the operator has performed maintenance of the air
5 spinning device 4, winding of the yam Y around the first bobbin B is
started without replacing the first bobbin B supplied to the pair of
bobbin holders 21, 22, and thus, decrease in the operating rate of the
spinning unit 2 can be reduced.
[0084] In the spinning machine 1, when the third sensor 103 has
10 detected that the yam Y has been spun out and then the first sensor 1 0 1
has detected that the yam Y has not been caught, the control unit 100
controls the operating device 12, the supply device 30, and the yam
threading device 17 as being the case where the second-type error has
been detected. When the third sensor 1 03 has detected that the yam Y
15 has been spun out and then the first sensor 10 1 has detected that the
yam Y has not been caught, unnecessary yam Y is less likely to have
been wound around the first bobbin B that has been supplied to the pair
of bobbin holders 21, 22. Thus, in this case, by controlling the
operating device 12, the supply device 30, and the yam threading device
20 17 as being the case where the second-type error has been detected, a
period of time required for recovery from the error can be shortened by
a period oftime required for replacing the bobbin B.
[0085] In each spinning unit 2 of the spinning machine 1, the winding
device 20 is disposed at a position for winding the yam Y traveling
25 upward from the lower side. Thus, even if the position of the winding
device 20 is high, recovery from the error is automatically made, which
can prevent decrease in operating rate of the spinning unit 2 due to work
of the operator at a high place.
[0086] A yam threading method that is performed in the spmnmg
machine 1 includes: a step of discharging the first bobbin B from the
5 pair of bobbin holders 21, 22, supplying the second bobbin B to the pair
of bobbin holders 21, 22, and threading the yam Y onto the second
bobbin B when the first-type error that occurs after the catching
operation of the yam threading device 17 to catch the yam Y has been
detected in a state in which the first bobbin B has been supplied to the
10 pair of bobbin holders 21, 22; and a step of threading the yam Y onto
the first bobbin B while maintaining a state in which the first bobbin B
has been supplied to the pair of bobbin holders 21, 22 when the
second-type error that occurs before the catching operation of the yam
threading device 17 to catch the yam Y or during the catching operation
15 has been detected in the state in which the first bobbin B has been
supplied to the pair of bobbin holders 21, 22. With this yam threading
method, similarly to the above-described spinning machine 1, even if an
error has occurred in a series of operations from when a bobbin B is
supplied to the pair of bobbin holders 21, 22 until a predetermined
20 amount of the yam Y is wound around the bobbin B, load on the
operator related to recovery from the error can be reduced and decrease
in operating rate caused by the recovery from the error can be reduced.
[Modifications]
[0087] Although one embodiment of the present disclosure has been
25 described above, the present disclosure is not limited to the
embodiment. For example, the bobbin collection section configured to
collect a first bobbin B discharged from the pair of bobbin holders 21,
22 may be configured as a stocker configured to store the first bobbin B.
With this configuration, the first bobbin B can be collected without
using the conveyor 18 or the like, and the first bobbin B stored in the
5 stocker can be automatically discharged to a collection box, for
example, provided in a predetermined location or can be collected by
the operator. In the above-described spinning machine 1, this stocker
can be provided to the doffing carrier 10.
[0088) A device configured to receive a first bobbin B from the pair of
10 bobbin holders 21, 22 and pass the first bobbin B to a bobbin collection
section such as the conveyor 18, may be provided separately from the
supply device 30. Respective devices configured to make recovery
from an error that has occurred in a series of operations from when an
empty bobbin B is supplied to the pair of bobbin holders 21, 22 until a
15 predetermined amount of yam is wound around the bobbin B may be
provided separately from the doffing carrier 10. The doffing carrier 10
does not have to include the bobbin stocker 15, and the supply device 30
may receive an empty bobbin B conveyed by the conveyor 18 and
supply it directly to the winding device 20. The doffmg carrier 10 only
20 needs to have a function of doffing a package P, and does not have to
have a function of supplying an empty bobbin B.
[0089) In the embodiment, the drafting device 3 includes the roller
pairs. However, the roller pair (front roller pair) disposed at a position
closest to the air spinning device 4 in the traveling direction of the fiber
25 bundle F, may be configured as part of another device. For example,
the spinning unit 2 may include a supply device configured to supply
the fiber bundle F drafted by the drafting device 3 to the air spinning
device 4, and the front roller pair may be included in part of this supply
device. The front roller pair may be included in the drafting device 3
configured to draft the sliver S or the supply device configured to
5 supply the fiber bundle F to the air spinning device 4, or may be
provided independently without being included in another device.
[0090] A combing roller may be provided instead of the drafting device
3, and the air spinning device 4 may twist the fiber bundle F supplied
from the combing roller to form the yarn Y.
10 [0091] The air spinning device 4 may include a pair of air-jet nozzles
configured to twist the fiber bundle F in directions opposite to each
other.
[0092] The winding device 20 is not limited to a type in which the drum
23 is rotationally driven, whereby a bobbin B being in contact with the
15 drum 23 is rotated in a driven manner. The winding device 20 may be
of a type in which a bobbin B is rotationally driven, whereby a drum 23
being in contact with the bobbin B is rotated in a driven manner. In
other words, the drum 23 only needs to be a drum configured to rotate
while being in contact with a bobbin B.
20 [0093] In the spinning unit 2, the traveling direction of the yam Y is
turned at the yam storage device 6. However, the traveling direction of
the yam Y does not have to be turned at the yam storage device 6.
[0094] In the spinning unit 2, the respective devices are disposed such
that the yam Y supplied from the lower side is wound on the upper side
25 in the machine height direction. However, in the spinning unit 2, the
respective devices may be disposed such that the yarn Y supplied from
the upper side is wound on the lower side in the machine height
direction. In this case, the doffing carrier 1 0 may be provided so as to
travel on a traveling path in a lower portion of the spinning machine 1,
and also a discharged first bobbin B may be discharged to a discharge
5 section in a lower portion of the spinning machine 1.
[0095] In order to pull out the yam Y from the air spinning device 4, a
delivery roller and a nip roller may be disposed between the air spinning
device 4 and the yam storage device 6. When the delivery roller and
the nip roller are provided, a slack tube using suction airflow and/or a
1 0 mechanical compensator, for example, may be provided instead of the
yam storage device 6.
[0096] The yam monitoring device 5 may be disposed between the yam
storage device 6 and the winding device 20.
[0097] The yam joining device 7, the first catching-and-guiding device
15 8, and the second catching-and-guiding device 9 may be provided to a
yam joining carrier that is movable along a direction in which the
spinning units 2 are aligned. Each spinning unit 2 or the doffing
carrier 10 may be provided with a yam draw-out device configured to
pull out the yam Y from a package P when yam joining is performed,
20 for example.
[0098] The yam winding machine is not limited to the sptnnmg
machine 1, and may be an open-end spinning machine, for example.
The open-end spinning machine is a spinning machine including the
spinning units 2 in each of which an open-end spinning device
25 (rotor-type spinning device) is provided instead of the drafting device 3
and the air spinning device 4. The open-end spinning device is a
device configured to separate fibers of the sliver S using a combing
roller or airflow, convey the separated fibers using airflow into a rotor
that is rotating at high speed, and cause the fibers to be gathered into a
bundle on an inner wall of the rotor. The gathered fibers are drawn out
5 from the open-end spinning device, whereby the yam Y is formed.
[0099] In the spinning unit 2, instead of using the configuration m
which two yam ends are connected by the yam joining device 7, the
yam Y from the air spinning device 4 and the yam Y from a package P
may be connected (pieced) by inserting the yam Y from the package P
10 into the air spinning device 4 and starting the drafting operation of the
drafting device 3 and the spinning operation of the air spinning device
4.
[0100] The materials and shapes of the respective components
described above are not limited to those described above, and various
15 types of materials and shapes may be used. At least some
configurations in the embodiment described above may be optionally
used in combination with at least some other configurations in the
embodiment.
[0101] According to the present disclosure, it is possible to provide a
20 yam winding machine and a yam threading method with which, even if
an error has occurred in a series of operations from when a bobbin is
supplied to a pair of bobbin holders until a predetermined amount of
yam is wound around the bobbin, load on an operator related to
recovery from the error can be reduced and decrease in operating rate
25 caused by the recovery from the error can be reduced.

We claim:
1. A yam winding machine ( 1) comprising:
a winding device (20) including a pair of bobbin holders (21,
22) configured to hold a bobbin (B) and a cradle (24) configured to
5 support the pair of bobbin holders (21, 22);
an operating device (12) configured to operate the cradle (24) to
open and close the pair of bobbin holders (21, 22);
a supply device (30) configured to supply the bobbin (B) to the
pair of bobbin holders (21, 22);
10 a yam threading device (17) configured to catch yam (Y) and
thread the yam (Y) onto the bobbin (B); and
a control unit (1 00) configured to control the operating device
(12), the supply device (30), and the yam threading device (17), wherein
the control unit (100) is configured to perform a first control
15 when a first-type error that occurs after a catching operation of the yam
threading device (17) to catch the yam (Y) has been detected in a state
in which a first bobbin (B) as the bobbin (B) has been supplied to the
pair of bobbin holders (21, 22), the first control performed to control the
operating device (12), the supply device (30), and the yam threading
20 device (17) such that the first bobbin (B) is discharged from the pair of
bobbin holders (21, 22), a second bobbin (B) as the bobbin (B) is
supplied to the pair of bobbin holders (21, 22), and the yam (Y) is
threaded onto the second bobbin (B), and
the control unit (100) is configured to perform a second control
25 when a second-type error that occurs before the catching operation or
during the catching operation has been detected in a state in which the
39
FP20-0007 -00
first bobbin (B) has been supplied to the pair of bobbin holders (21, 22),
the second control performed to control the operating device (12), the
supply device (30), and the yam threading device (17) such that the yam
(Y) is threaded onto the first bobbin (B) while the state in which the first
5 bobbin (B) has been supplied to the pair of bobbin holders (21, 22) is
being maintained.
2. The yam winding machine (1) according to claim 1, further
compnsmg:
10 a bobbin collection section (18) configured to collect the first
bobbin (B) discharged from the pair of bobbin holders (21, 22) when the
first-type error has been detected; and
a bobbin holding device (14) configured to hold the second
bobbin (B) to be supplied to the pair of bobbin holders (21, 22) when
15 the first-type error has been detected, wherein
the supply device (30) is configured to receive the first bobbin
(B) from the pair of bobbin holders (21, 22) and pass the first bobbin
(B) to the bobbin collection section (18), and to receive the second
bobbin (B) from the bobbin holding device (14) and pass the second
20 bobbin (B) to the pair of bobbin holders (21, 22), when the first-type
error has been detected.
25
3. The yam winding machine (1) according to according to claim
2, wherein
the supply device (30) includes a clamping unit (35) configured
to clamp the bobbin (B), and is configured such that the clamping unit
(3S) is movable between a first position (A1) and a second position (A2)
and the clamping unit (3S) is movable between the first position (A1)
and a third position (A3), the first position (A1) being a standby
position of the clamping unit (3S), the second position (A2) being a
S position for passing the bobbin (B) to the pair of bobbin holders (21, 22)
and receiving the bobbin (B) from the pair of bobbin holders (21, 22),
the third position (A3) being a position for passing the bobbin (B) to the
bobbin collection section (18), and
the bobbin holding device (14) is configured to be movable
10 between a fourth position (A4) and a fifth position (AS), the fourth
position (A4) being a position on a track of the clamping unit (3S)
between the first position (A1) and the second position (A2), the fifth
position (AS) being a position off the track of the clamping unit (3S)
between the first position (A1) and the second position (A2).
1S
20
2S
4. The yarn winding machine (1) according to claim 3, wherein the
track of the clamping unit (3S) between the fust position (A1) and the
third position (A3) passes through an area above the fourth position
(A4) and the fifth position (AS) in a height direction.
S. The yam winding machine (1) according to any one of claims 2
to 4, wherein the bobbin collection section (18) comprises a conveyor
configured to convey the first bobbin (B).
6. The yam winding machine (1) according to any one of claims 2
to 4, wherein the bobbin collection section (18) comprises a stocker
configured to store the first bobbin (B).
7. The yarn winding machine (1) according to any one of claims 1
to 6, further comprising:
5 a first sensor ( 1 0 1) configured to detect whether the yam (Y) has
been caught by the yam threading device (17); and
a second sensor (102) configured to detect whether the yam (Y)
is being wound by the winding device (20), wherein
the control unit (100) is configured to perform the first control
10 when the first sensor (101) has detected that the yam (Y) has been
caught and then the second sensor (102) has detected that the yam (Y) is
not being wound, as being a case where the first-type error has been
detected.
15 8. The yam winding machine (1) according to claim 7, further
compnsmg:
an air spinning device (4) configured to twist a fiber bundle (F)
using swirling airflow to form the yam (Y); and
a third sensor (103) configured to detect whether the yam (Y)
20 has been spun out from the air spinning device (4), wherein
25
the control unit (100) is configured to perform the second
control when the third sensor (103) has detected that the yarn (Y) has
not been spun out, as being a case where the second-type error has been
detected.
9. The yarn winding machine ( 1) according to claim 8, wherein the
42
control unit (100) is configured to perform the second control when the
third sensor (103) has detected that the yarn (Y) has been spun out and
then the first sensor (101) has detected that the yam (Y) has not been
caught, as being the case where the second-type error has been detected.
10. The yam winding machine (1) according to any one of claims 1
to 9, wherein the winding device (20) is disposed at a position for
winding the yam (Y) traveling upward from a lower side.
10 11. A yarn threading method that is performed in a yam winding
machine (1) including:
a winding device (20) including a pair of bobbin holders (21,
22) configured to hold a bobbin (B) and a cradle (24) configured to
support the pair of bobbin holders (21, 22);
15 an operating device (12) configured to operate the cradle (24) to
open and close the pair of bobbin holders (21, 22);
a supply device (30) configured to supply the bobbin (B) to the
pair of bobbin holders (21, 22); and
a yam threading device (17) configured to catch yarn (Y) and
20 thread the yam (Y) onto the bobbin (B), the yam threading method
compnsmg:
a step of, when a first-type error that occurs after a catching
operation of the yarn threading device (17) to catch the yam (Y) has
been detected in a state in which a first bobbin (B) as the bobbin (B) has
25 been supplied to the pair ofbobbin holders (21, 22), discharging the first
bobbin (B) from the pair of bobbin holders (21, 22), supplying a second
bobbin (B) as the bobbin (B) to the pair of bobbin holders (21, 22), and
threading the yarn (Y) onto the second bobbin (B); and
a step of, when a second-type error that occurs before the
catching operation or during the catching operation has been detected in