TECHNICAL FIELD
[0001] The present disclosure relates to a spinning machine and a yarn catching method.
BACKGROUND
[0002] In a yam winding process in a spinning machine, winding
tension is controlled using a yarn storing device. For example, Patent
Document 1 (Japanese Unexamined Patent Publication No.
10 2010-174421) discloses a spinning machine including a spinning device
configured to twist a fiber bundle to form yarn, a winding device
configured to wind the yarn formed by the spinning device to form a
package, a yarn storing device disposed downstream of the spinning
device to temporarily store the yarn, and a yarn suction device capable
15 of producing a suction flow at a yarn suction inlet disposed in the
vicinity of the outer peripheral surface of the yam storing device. This
spinning machine can efficiently prevent scattering of fiber waste and
remove unnecessary yarn from the yarn storing device.
SUMMARY
20 [0003] In the conventional spinning machine described above, when the
yarn is disconnected between the yam storing device and the winding
device, two yam ends are formed, namely, a yam end formed on the
upstream side of the yarn wound as a package and a yarn end formed on
the downstream side of the yam stored in the yarn storing device.
25 Furthermore, in the conventional spinning machine above, since the
operation of the spinning device is stopped when yam disconnection is
1
FP18-0683-00IN-MRT
detected between the yarn storing device and the winding device, a yarn
end is also formed on the upstream side of the yarn stored in the yarn
storing device. As a result, in the conventional spinning machine
above, the disconnected yam having two yam ends remains in the yam
5 storing device. Since the yam ends of the disconnected yarn are
present in a free state, the disconnected yam may get entangled with
some places in the spinning machine. It is difficult to remove the
entangled disconnected yarn by a mechanical method. Furthermore,
the disconnected yarn stored in the yarn storing device may be
10 significantly slackened, and portions of the disconnected yarn may
overlap one another such that the yarn becomes entangled. Moreover,
the disconnected yam left in the spinning machine may cause trouble in
the joining operation or yarn waste may be mixed into the package.
An operator temporarily stops the yam winding operation in the
15 spinning machine, removes the disconnected yam, and then resumes the
winding operation.
[0004] An aspect of the present disclosure is aimed to provide a
spinning machine and a yam catching method capable of easily
removing the disconnected yam.
20 [0005] A spinning machine according to an aspect of the present
disclosure includes a yarn feeding part configured to feed yam, a
winding device configured to wind the yam to form a package, a yam
storing device disposed between the yam feeding part and the winding
device and having a yarn storing roller having an outer peripheral
25 surface around which the yam fed from the yam feeding part is wound
to be temporarily stored, a first suction device having a first suction inlet
2
FP18-0683-00IN-MRT
disposed at a place along a yam path between the yam storing device
and the winding device, the first suction inlet being configured such that
a suction flow is produced at least while the yam is traveling from the
yam storing device to the winding device, and a second suction device
5 having a second suction inlet disposed to face the yam storing roller.
[0006] A yam catching method according to an aspect of the present
disclosure is performed in a spinning machine including a yam feeding
part configured to feed yam, a winding device configured to wind the
yam to form a package, a yam storing device disposed between the yam
10 feeding part and the winding device and having a yam storing roller
having an outer peripheral surface around which the yam fed from the
yam feeding part is wound to be temporarily stored, a first suction
device having a first suction inlet disposed at a place along a yam path
between the yarn storing device and the winding device, and a second
15 suction device having a second suction inlet disposed to face the yarn
storing roller. The yam catching method includes: producing a suction
flow at the first suction inlet at least while the yam is traveling from the
yarn storing device to the winding device; when the yam is
disconnected between the yarn storing device and the winding device,
20 allowing the first suction device to suck a downstream-side end of the
yam at least partially stored in the yarn storing device; and when the
yam is disconnected between the yam storing device and the winding
device, allowing the second suction device to suck an upstream-side end
of the yam at least partially stored in the yam storing device.
25 [0007] In the spinning machine and the yam catching method, when the
yarn is disconnected between the yarn storing device and the winding
3
FP18-0683-00IN-MRT
device, for example, the downstream-side end of the yarn (disconnected
yam) at least partially stored in the yarn storing device is caught by the
first suction device having the first suction inlet configured such that a
suction flow acts on the yam at least while the yam is traveling from the
5 yam feeding part to the winding device, and the upstream-side end of
the disconnected yam is caught by the second suction device. The
disconnected yam caught by the first suction device and the second
suction device thus can be easily removed.
[0008] The spinning machine according to an aspect of the present
10 disclosure may further include a transportation device configured to
catch the yam fed from the yam feeding part and transport the caught
yam to a position between the yam storing device and the winding
device in a state in which formation of the package by the winding
device is suspended. In the spinning machine with this configuration,
15 after the yam is disconnected between the yam storing device and the
winding device, a yam end newly fed from the yam feeding part is
transported to the joining device by the transportation device. Thus,
the first suction device and the second suction device can be disposed at
respective positions suitable for catching the yarn ends of the
20 disconnected yam.
[0009] A spinning machine according to an aspect of the present
disclosure includes a yam feeding part configured to feed yam, a
winding device configured to wind the yam to form a package, a yam
storing device disposed between the yam feeding part and the winding
25 device and having a yarn storing roller having an outer peripheral
surface around which the yam fed from the yarn feeding part is wound
4
FP18-0683-00IN-MRT
to be temporarily stored, a transportation device configured to catch the
yarn fed from the yarn feeding part and transport the caught yarn to a
position between the yam storing device and the winding device in a
state in which formation of the package by the winding device is
5 suspended, a first suction device having a first suction inlet disposed at a
place along a yarn path between the yarn storing device and the winding
device, and a second suction device having a second suction inlet
disposed to face the yam storing roller.
[0010] A yam catching method according to an aspect of the present
10 disclosure is performed in a spinning machine including a yam feeding
part configured to feed yam, a winding device configured to wind the
yam to form a package, a yam storing device disposed between the yam
feeding part and the winding device and having a yam storing roller
having an outer peripheral surface around which the yam fed from the
15 yarn feeding part is wound to be temporarily stored, a transportation
device configured to catch the yarn fed from the yarn feeding part and
transport the caught yam to a position between the yarn storing device
and the winding device in a state in which formation of the package by
the winding device is suspended, a first suction device having a first
20 suction inlet disposed at a place along a yam path between the yam
storing device and the winding device, and a second suction device
having a second suction inlet disposed to face the yam storing roller.
The yarn catching method includes: when the yam is disconnected
between the yam storing device and the winding device, allowing the
25 first suction device to suck a downstream-side end of the yarn at least
partially stored in the yarn storing device; and when the yam is
5
FP18-0683-OOIN-3VIRT
disconnected between the yam storing device and the winding device,
allowing the second suction device to suck an upstream-side end of the
yam at least partially stored in the yam storing device.
[0011 ] In the spinning machine and the yam catching method, when the
5 yam is disconnected between the yam storing device and the winding
device, for example, the downstream-side end of the disconnected yam
is caught by the first suction device provided separately from the
transportation device, and the upstream-side end of the disconnected
yam is caught by the second suction device. The disconnected yam
10 caught by the first suction device and the second suction device thus can
be easily removed.
[0012] In the spinning machine according to an aspect of the present
disclosure, the yam storing device may include a driving part
configured to rotate the yam storing roller in a winding direction in
15 which the yam storing roller is rotated when the yam is wound around
the outer peripheral surface of the yarn storing roller and in a removing
direction in which the yam storing roller is rotated when the yarn is
removed from the yam storing roller. The second suction inlet of the
second suction device may be disposed such that a direction of velocity
20 of the outer peripheral surface when the yarn storing roller rotates in the
removing direction matches a direction of suction of the second suction
inlet. In the spinning machine with this configuration, the
disconnected yam unwound from the yam storing roller can be sucked
without increasing a suction force of the second suction inlet in the
25 second suction device.
[0013] In the spinning machine according to an aspect of the present
6
FP18-0683-00IN-MRT
disclosure, when the yam is disconnected between the yam storing
device and the winding device, the first suction device may suck a
downstream-side end of the yam at least partially stored in the yam
storing device, and the second suction device may suck an
5 upstream-side end of the yam at least partially stored in the yam storing
device. In the spinning machine with this configuration, both ends of
the disconnected yarn can be caught As a result, entangling of the
yam due to portions of the disconnected yam overlapping one another
can be avoided, or the disconnected yam can be prevented from being
10 left in the spinning machine.
[0014] The spinning machine according to an aspect of the present
disclosure may further include a yarn take-off guide configured to
completely draw the downstream-side end of the yam from the first
suction device. In this configuration, the disconnected yam drawn
15 from the first suction device by the yam take-off guide can be sucked by
the second suction device, so that the disconnected yarn can be easily
removed.
[0015] The spinning machine according to an aspect of the present
disclosure may further include a control part configured to control the
20 yarn storing device and the yarn take-off guide such that the
downstream-side end of the yarn is completely drawn from the first
suction device simultaneously with rotation of the yam storing roller in
a removing direction or after start of the rotation. The disconnected
yarn is thus completely drawn from the first suction device, so that the
25 disconnected yarn can be sucked and removed from the yarn storing
roller by the second suction inlet of the second suction device.
7
FP18-0683-00IN-MRT
[0016] The spinning machine according to an aspect of the present
disclosure may further include a joining device configured to perform
joining operation of joining the yam fed by the yam feeding part and the
yam wound by the winding device. The control part may control the
5 yam feeding part, the yam storing device, the joining device, and the
winding device. The control part may start the joining operation by
the joining device after the yam storing roller is rotated in the removing
direction and the yam disconnected between the yam storing device and
the winding device and left on the yam storing roller is sucked and
10 removed by the second suction device, and may start winding of the
yam by the winding device after the joining operation is completed. In
the spinning machine with this configuration, the joining operation is
performed and the winding operation is started in a state in which the
disconnected yarn is not left in the yam storing device. As a result,
15 trouble can be prevented from occurring in the joining operation, or
yam waste can be prevented from being mixed into the package.
[0017] The spinning machine according to an aspect of the present
disclosure may further include a blowing device configured to blow air
toward the first suction inlet. In the spinning machine with this
20 configuration, when the yam is disconnected between the yarn storing
device and the winding device, the blowing device blows the air toward
the first suction inlet to further ensure that the yarn end of the
disconnected yarn is sucked by the first suction inlet.
[0018] The spinning machine according to an aspect of the present
25 disclosure may include an air spinning device configured to form the
yam by twisting fiber bundle with an air flow. In the spinning machine
8
FP18-0683-00IN-MRT
including the air spinning device, when the yam is disconnected
between the yarn storing device and the winding device, generation of
the yam by the air spinning device is stopped and therefore a yam end is
formed on the upstream side of the yam storing device. Therefore, by
5 providing the first suction device and the second suction device as
described above, entanglement of the disconnected yam can be avoided.
[0019] The spinning machine according to an aspect of the present
disclosure may further include a cutting device configured to cut the
yam caught by the first suction device and the second suction device.
10 In the spinning machine with this configuration, the disconnected yam
cut into two pieces can be sucked and removed by the first suction
device and the second suction device, respectively.
[0020] In the spinning machine according to an aspect of the present
disclosure, the yam storing device may be disposed below the winding
15 device in a vertical direction. When the yam storing device is
disposed below the winding device, it is more likely that the
downstream-side end of the yam disconnected between the yarn storing
device and the winding device hangs down, and portions of the yam
overlaps such that the yam becomes entangled, or the cut yam is left in
20 the spinning machine. In the spinning machine with this configuration,
the disconnected yam is caught by the first suction device and the
second suction device, thereby avoiding the troubles described above.
[0021 ] According to an aspect of the present disclosure, the
disconnected yarn can be easily removed.
25 BRIEF DESCRIPTION OF THE DRAWINGS
[0022] FIG. 1 is a schematic configuration diagram illustrating a
9
FP18-0683-00IN-MRT
configuration of a spinning machine of an embodiment.
FIG. 2 is a plan view of the yarn storing device in FIG. 1 as
viewed from above a rotation axis.
FIG. 3 is a functional block diagram of the spinning machine in
5 FIG. 1.
FIG. 4 is a flowchart illustrating an operation performed after
disconnection of yarn in the spinning machine of an embodiment.
DETAILED DESCRIPTION
[0023] Preferred embodiments of an aspect of the present disclosure
10 will be described in detail below with reference to the accompanying
drawings. In the description of the drawings, the same or
corresponding elements are denoted by the same reference signs and an
overlapping description will be omitted.
[0024] As illustrated in FIG. 1, a spinning machine 1 includes spinning
15 units 2 and a control part 90. The spinning units 2 are arranged in a
row. Each spinning unit 2 drafts sliver (fiber bundle) S to form fiber
bundle F, twists the fiber bundle F using a swirl air flow to form yarn Y,
and winds the yarn Y around a bobbin B to form a package P. The
control part 90 controls the operation of the spinning machine 1.
20 [0025] The control part 90 is configured with, for example, a machine
control device and a plurality of unit controllers. The machine control
device is a host controller for a plurality of unit controllers. The unit
controllers are provided for a predetermined number (one or more) of
spinning units 2 and each control the corresponding spinning unit 2.
25 The control performed by the control part 90 will be detailed later.
The control part 90 may be configured only with unit controllers.
10
FP18-0683-00IN-MRT
[0026] Hereinafter, the upstream side in the traveling direction of sliver
S, fiber bundle F, and yarn Y during winding of a package P is referred
to as "upstream side" and the downstream side in the traveling direction
is referred to as "downstream side". One side in a horizontal direction
5 perpendicular to the arrangement direction of a plurality of spinning
units 2 (for example, the working passage side) is referred to as "front
side", and the other side in the horizontal direction is referred to as "rear
side". The upper side in the vertical direction with respect to the
installation surface of the spinning machine 1 is referred to as "upper
10 side" and the lower side in the vertical direction is referred to as "lower
side".
[0027] Each spinning unit 2 includes, in order from the upstream side
toward the downstream side, a drafting device (yarn feeding part) 3, an
air spinning device (yarn feeding part) 4, a yarn monitoring device 5, a
15 yarn storing device 6, a joining device 7, a yarn sensor 80, and a
winding device 20. Each spinning unit 2 further includes a first catch
guide device 8, a second catch guide device 9, a first suction device 71,
a second suction device 75, and a blowing device 85. As an example,
the traveling direction of the sliver S, the fiber bundle F, and the yarn Y
20 from the drafting device 3 to the yarn storing device 6 is the direction
from the front side toward the rear side and is inclined to the upper side
relative to the horizontal direction. The traveling direction of the yarn
Y from the yarn storing device 6 to the winding device 20 is the
direction from the lower side toward the upper side and inclined to the
25 front side relative to the vertical direction. In each spinning unit 2, the
traveling direction of yarn Y is switched at the yarn storing device 6.
11
FP18-0683-00IN-MRT
[0028] 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
drafting device 3 includes, in order from the upstream side toward the
downstream side, a back roller pair 31, a third roller pair 32, a middle
5 roller pair 33, and a front roller pair 34. An apron belt 35 is stretched
around each of the rollers of the middle roller pair 33.
[0029] The air spinning device 4 twists the fiber bundle F from the
drafting device 3 using a swirl air flow to form the yarn Y. The air
spinning device 4 includes a nozzle block (not illustrated in the
10 drawings) and a hollow guide shaft (not illustrated in the drawings). In
the nozzle block, the fiber bundle F fed from the drafting device 3 is
guided to the inside and meanwhile, a swirl air flow acts on the fiber
bundle F. The twisted fiber bundle F passes through the inside of the
hollow guide shaft and is discharged to the outside. The production
15 and stopping of the swirl air flow is controlled by, for example, the unit
controller.
[0030] The yarn monitoring device 5 monitors information on the
traveling yarn Y and detects whether there is a yarn defect based on the
monitored information. When detecting a yarn defect, the yarn
20 monitoring device 5 transmits a yarn defect detection signal to the
control part 90.
[0031] The yarn storing device 6 is disposed between the air spinning
device 4 and the winding device 20 to temporarily store the yarn Y fed
from the air spinning device 4 by winding the yarn Y around a yarn
25 storing roller 61. The yarn storing device 6 is disposed below the
winding device 20 in the vertical direction. The yarn storing device 6
12
FP18-0683-00IN-MRT
includes a yarn storing roller 61 and a hooking member 62.
[0032] The yam storing roller 61 is rotated by an electric motor (driving
part) M. The electric motor M rotates the yam storing roller 61 in a
winding direction in which the yarn storing roller 61 is rotated (forward
5 rotation) when the yam Y is wound around the outer peripheral surface
of the yarn storing roller 61 and in a removing direction in which the
yam storing roller 61 is rotated (reverse rotation) when the yam Y is
removed from the yarn storing roller 61. The hooking member 62 is
mounted on the downstream end of the yarn storing roller 61 and is
10 rotatable relative to the yam storing roller 61. A magnetic force acts
upon the hooking member 62 to interfere with rotation of the hooking
member 62 relatively to the yarn storage roller 61. Therefore, in a
state in which a certain tension or higher is not exerted on the yam Y,
the hooking member 62 rotates integrally with the yarn storing roller 61,
15 so that the yam Y is wound (stored) around the yam storing roller 61.
In a state in which a certain tension or higher is exerted on yam Y, the
hooking member 62 rotates relative to the yam storing roller 61, so that
the yam Y is unwound from the yam storing roller 61. The yam
storing device 6 stores the yam Y in this way to accommodate variations
20 in tension exerted on the yam Y on the downstream side of the yam
storing device 6 and stably draw (feed out) the yam Y from the air
spinning device 4.
[0033] A first guide 63 is disposed upstream of the yam storing device
6. The first guide 63 guides the yam Y traveling from the upstream
25 side to the yam storing device 6. The first guide 63 is provided so as
to be movable. Before the winding of a package P by the winding
13
FP18-0683-00IN-MRT
device 20 is started, the yam Y newly fed from the air spinning device 4
is caught by the first catch guide device 8 and guided to a joining
position. Subsequently, before joining operation is performed, the first
guide 63 moves to pull the yam Y from the air spinning device 4 toward
5 the yarn storing device 6.
[0034] A second guide 64, a third guide 65, and a fourth guide (yam
take-off guide) 66 are disposed downstream of the yam storing device 6.
The second guide 64 and the third guide 65 guide the yam Y traveling
from the yam storing device 6 to the downstream side. The second
10 guide 64 is provided so as to be movable and can guide the yam Y to the
third guide 65. The fourth guide 66 is provided so as to be movable.
The fourth guide 66 moves to allow the yam Y to be hooked on the
hooking member 62 or allows the yam Y to be removed from the
hooking member 62.
15 [0035] Since the operation of the air spinning device 4 stops when the
yam Y is disconnected between the yarn storing device 6 and the
winding device 20, the yam Y is also disconnected between the yam
storing device 6 and the air spinning device 4. As a result,
disconnected yam YD is generated which is at least partially stored in
20 the yam storing device 6 and has an upstream-side yam end and a
downstream-side yarn end. The downstream-side end YD2 of the
disconnected yarn YD is sucked by the first suction device 71. The
fourth guide 66 completely draws (pulls out) the downstream-side end
YD2 from the first suction device 71.
25 [0036] The joining device 7 performs joining operation of joining the
yarn Y from the air spinning device 4 and the yam Y from the package P
14
FP18-0683-00IN-MRT
when the yam Y is cut or disconnected or the yarn Y breaks for some
reason. The joining device 7 is a splicer that twists yarn ends together
using a swirl air flow. The joining device 7 may be a mechanical
knotter. Each of the first catch guide device 8 and the second catch
5 guide device 9 can swing about its base end portion. For example,
when joining operation is to be performed, the first catch guide device
(transportation device) 8 swings downward to catch the yarn Y from the
air spinning device 4 using a suction air flow and thereafter swings
upward to guide (transport) the yarn Y from the air spinning device 4 to
10 the joining device 7 disposed between the yam storing device 6 and the
winding device 20. When joining operation is to be performed, the
second catch guide device 9 swings upward to catch the yarn Y from the
package P using a suction air flow and thereafter swings downward to
guide the yarn Y from the package P to the joining device 7. The
15 joining device 7 connects the guided yarns Y
[0037] The yam sensor 80 is disposed between the joining device 7 and
the winding device 20 to detect whether the yam Y is fed to the winding
device 20. Information on the absence/presence of the yam Y as
detected by the yam sensor 80 is output to the control part 90.
20 [0038] The winding device 20 winds the yam Y drawn from the air
spinning device 4 by the yam storing device 6 onto a bobbin B to form a
package P. The winding device 20 includes a drum 23, a pair of
bobbin holders 21, and a cradle 24. A yam guide 26 is disposed
upstream of the winding device 20. The yarn guide 26 guides the yarn
25 Y traveling from the upstream to the drum 23.
[0039] The drum 23 makes contact with the bobbin B to rotate the
15
FP18-0683-00IN-MRT
bobbin B. In a state in which yarn Y is wound around the bobbin B,
the drum 23 is in contact with the package P to rotate the package P.
The drum 23 is rotatably supported by a frame (not illustrated in the
drawings) and rotated around a rotation axis LI by a drum driving part
5 (not illustrated in the drawings) provided for each spinning unit 2. The
surface of the drum 23 has a traverse groove (not illustrated in the
drawings). Accordingly, the yarn Y is traversed when the yarn Y is
wound onto the bobbin B.
[0040] The cradle 24 is provided so as to be swingable about a
10 swinging axis L2. The cradle 24 swings about the swinging axis L2 to
accommodate increase in diameter of the package P accompanying
winding of the yarn Y onto the bobbin B. A pair of bobbin holders 21
are provided on the cradle 24 to rotatably hold both ends of the bobbin
B.
15 [0^41] The first suction device 71 has a first suction inlet 72 disposed at
a place along a yarn path between the yarn storing device 6 and the
winding device 20. The first suction inlet 72 is configured such that a
suction flow is produced at least while the yarn Y is traveling from the
yarn storing device 6 to the winding device 20. A suction flow is
20 produced at the first suction inlet 72 while the spinning unit 2 continues
to form a package P and while joining operation is performed even
when formation of a package P is suspended. In other words, when
there is a possibility that disconnected yarn YD may be formed, a
suction flow is produced at the first suction inlet 72. Conversely, when
25 there is no possibility that disconnected yarn YD is formed, a suction
flow at the first suction inlet 72 may be stopped. For example, when
16
FP18-0683-00IN-MRT
the operation of the spinning unit 2 is stopped, for example, due to
maintenance of the spinning unit 2, or when the package P is full and
the spinning unit 2 waits for doffing operation, a suction flow may not
be produced at the first suction inlet 72.
5 [0042] The first suction device 71 is fixed to, for example, a frame (not
illustrated in the drawings) such that the first suction inlet 72 is
unmovable. The first suction inlet 72 is connected to a suction source
(not illustrated in the drawings). The suction force of the first suction
inlet 72 is turned on/off through control of opening/closing of a shutter
10 73 by the control part 90. When the yarn Y is disconnected between
the yam storing device 6 and the winding device 20, the first suction
device 71 sucks the downstream-side end YD2 (see FIG. 2) of the
disconnected yam YD. The shutter 73 is provided between the suction
source and the first suction inlet 72. The suction force of the first
15 suction inlet 72 may be turned on/ofYby controlling the operation of the
suction source by the control part 90, instead of providing the shutter
73. During the time when power of the spinning machine 1 is on, a
suction flow may be always produced at the first suction inlet 72. In
this case, the control to turn off the suction force of the first suction inlet
20 72 is not performed.
[0043] The second suction device 75 has a second suction inlet 76
disposed to face the outer peripheral surface of the yarn storing roller 61
of the yarn storing device 6. When the yarn sensor 80 does not detect
the yam Y (when the yarn Y is disconnected), sucking by the second
25 suction device 75 is started, and the second suction inlet 76 sucks the
disconnected yarn YD. The second suction inlet 76 is disposed at a
17
FP18-0683-00IN-MRT
position where suction force acts on the outer peripheral surface of the
yarn storing roller 61 so that the yarn Y wound around the outer
peripheral surface can be sucked. The second suction inlet 76 is
connected to a suction source (not illustrated in the drawings). The
5 suction force of the second suction inlet 76 is turned on/off through
control of opening/closing of a shutter 77 by the control part 90. As
illustrated in FIG. 2, the second suction inlet 76 is disposed so as to be
positioned on an extension line in the tangent direction to the yarn
storing roller 61 and in the rotating direction (removing direction) of the
10 yarn storing roller 61 in reverse rotation when removing the
disconnected yarn YD stored in the yarn storing roller 61. The second
suction inlet 76 is disposed such that a direction of velocity of the outer
peripheral surface of the yarn storing roller 61 when the yarn storing
roller 61 rotates in the removing direction matches a direction of suction
15 of the second suction inlet 76. When the yarn Y is disconnected
between the yarn storing device 6 and the winding device 20, the second
suction device 75 sucks the upstream-side end YD1 of the disconnected
yarn YD.
[0044] The blowing device 85 is disposed to face the first suction inlet
20 72 with the yarn path interposed. The blowing device 85 has a
blowing port 86 to blow the compressed air toward the first suction inlet
72. The blowing port 86 is connected to a compressed air source (not
illustrated in the drawings). The blowing of the air from the blowing
port 86 is turned on/off through control of opening/closing of a solenoid
25 valve of a shutter 87 by the control part 90. When the yarn Y is
disconnected between the yarn storing device 6 and the winding device
18
FP18-0683-00IN-MRT
20, the blowing device 85 blows the compressed air to the first suction
inlet 72 to assist the first suction device 71 to catch the disconnected
yarn YD. That is, the blowing device 85 blows the compressed air to
feed the yarn Y to the first suction inlet 72. The blowing device 85
5 also prevents slacking of the yarn Y that may occur immediately after
joining operation by blowing the compressed air toward the yarn Y
immediately after the joining operation.
[0045] The control part 90 is an electronic control unit including a
central processing unit (CPU), a read only memory (ROM), and a
10 random access memory (RAM), etc. The control part 90 executes
various controls by loading a program stored in the ROM into the RAM
and running the program on the CPU.
[0046] When receiving a yarn defect detection signal from the yarn
monitoring device 5 or when receiving information that there is no yarn
15 Y detected by the yarn sensor 80, the control part 90 stops the operation
of the drafting device 3 and the air spinning device 4 to suspend feeding
of the yarn Y in order to disconnect the yarn Y The control part 90
may, for example, allow a cutter in the yarn monitoring device 5 to
operate in order to disconnect the yarn Y Alternatively, a dedicated
20 cutter for cutting the yarn Y may be provided, and the control part 90
may control the cutter to cut the yarn Y
[0047] As illustrated in FIG. 3, the control part 90 mainly uses
information input from the yarn sensor 80 and controls the air spinning
device 4, the yarn storing device 6, the joining device 7, the first catch
25 guide device 8, the second catch guide device 9, the fourth guide 66, the
first suction device 71, the second suction device 75, and the blowing
19
FP18-0683-00IN-MRT
device 85 to complete the joining operation while removing the
disconnected yarn YD.
[0048] The control part 90 controls the yam storing device 6 and the
fourth guide 66 such that the downstream-side end YD2 of the
5 disconnected yarn YD is completely drawn from the first suction inlet
72 simultaneously with reverse rotation of the yarn storing roller 61 in
the direction in which the disconnected yam YD left on the yam storing
roller 61 is removed (unwound) or after the start of the reverse rotation.
As used herein, "the downstream-side endYD2 of the disconnected
10 yam YD is completely drawn from the first suction inlet 72" means that
the downstream-side end YD2 of the disconnected yarn YD is drawn to
the position where a suction flow produced at the first suction inlet 72
does not act on the disconnected yam YD. After reversely rotating the
yam storing roller 61 and having the downstream-side end YD2 of the
15 disconnected yam YD sucked and removed by the second suction
device 75, the control part 90 starts joining operation by the joining
device 7, and after the joining operation is completed, starts winding of
the yam Y by the winding device 20.
[0049] The yam catching method carried out in the joining operation
20 performed after the yam Y is disconnected between the yam storing
device 6 and the winding device 20 will now be described in detail with
reference to FIG. 4.
[0050] When the yam Y is disconnected between the yam storing
device 6 and the winding device 20, the downstream-side end YD2 is
25 formed on the downstream side of the disconnected yarn YD stored in
the yarn storing device 6. The control part 90 detects the
20
FP18-0683-00IN-MRT
disconnection of the yarn Y between the yarn storing device 6 and the
winding device 20 (step SI). Specifically, the control part 90
determines the disconnection of the yarn Y between the yarn storing
device 6 and the winding device 20, based on the information that there
5 is no yarn Y detected by the yarn sensor 80. When detecting the
disconnection of the yarn Y between the yarn storing device 6 and the
winding device 20, the control part 90 stops the operation of the drafting
device 3 and the air spinning device 4 (step S2). Stopping the
operation of the drafting device 3 and the air spinning device 4 causes
10 formation of the upstream-side end YD1 of the disconnected yarn YD.
The first suction device 71, configured such that a suction flow is
produced at least while the yarn Y is traveling from the yarn storing
device 6 to the winding device 20, catches the disconnected yarn YD
(step S3). When the yarn sensor 80 detects the disconnection of the
15 yarn Y, the control part 90 actuates the blowing device 85 to assist the
first suction device 71 to suck the disconnected yarn YD. The
assistance by the blowing device 85 may be omitted. The control part
90 stops the rotation of the yarn storing roller 61 (step S4).
[0051] Subsequently, the control part 90 starts suction by the second
20 suction device 75 (step S5). Specifically, the control part 90 performs
control to open the shutter 77. The control part 90 starts reverse
rotation of the yarn storing roller 61 (step S6) and allows the second
suction device 75 to catch the disconnected yarn YD (step S7). The
disconnected yarn YD is thus caught by the first suction device 71 and
25 the second suction device 75. More specifically, the downstream-side
end YD2 of the disconnected yarn YD is sucked by the first suction
21
FP18-0683-00IN-MRT
device 71 and the upstream-side end YD1 is sucked by the second
suction device 75.
[0052] In this state, the control part 90 starts to move the fourth guide
66 such that the downstream-side end YD2 of the disconnected yarn YD
5 sucked by the first suction device 71 is completely drawn from the first
suction inlet 72 (step S8). The downstream-side end YD2 of the
disconnected yarn YD thus moves to the yarn storing device 6, and the
disconnected yarn YD is then sucked from the upstream-side end YD1
by the second suction device 75 (step S9). Through the operation at
10 step S1 to step S9, the disconnected yam YD can be sucked and
removed. Although steps SI to S9 are performed in order in the
description above, some steps may be performed almost simultaneously.
[0053] In a state in which the disconnected yam YD is thus sucked and
removed, the control part 90 controls the second catch guide device 9
15 such that yam Y on the winding device 20 side is guided to the joining
device 7. Subsequently, the control part 90 resumes the operation of
the drafting device 3 and the air spinning device 4 and controls the first
catch guide device 8 such that yam Y fed from the air spinning device 4
is guided to the joining device 7. The control part 90 controls the
20 joining device 7 to perform joining operation of joining the yam end of
the yam Y guided by the first catch guide device 8 and the yam end of
the yam Y guided by the second catch guide device 9. The control part
90 controls the winding device 20 to start winding of the yam Y
simultaneously with or after completion of the joining operation.
25 [0054] The yam catching method described above is performed, for
example, by loading a yam catching control program stored in the ROM
22
FP18-0683-00IN-MRT
and the like into the RAM and running the program on the CPU. Such
a yarn catching control program may be stored in a non-transitory
storage medium readable by an electronic control unit (computer).
Examples of the non-transitory storage medium include compact disc,
5 flexible disk, hard disk, magneto-optical disk, digital video disk,
magnetic tape, and semiconductor memory.
[0055] The operation effects of the spinning machine 1 in an
embodiment described above will now be described. In the spinning
machine 1 in the present embodiment, the downstream-side end YD2 of
10 the disconnected yarn YD is caught by the first suction device 71 having
the first suction inlet 72 configured such that a suction flow is produced
at least while the yarn Y is traveling from the yarn storing device 6 to
the winding device 20. The upstream-side end YD1 of the
disconnected yarn YD is caught by the second suction device 75 having
15 the second suction inlet 76 disposed to face the yarn storing roller 61.
This prevents the disconnected yarn YD caught by the first suction
device 71 and the second suction device 75 from being entangled
around parts arranged near the yarn storing device 6. The
disconnected yarn YD can be readily removed manually. The
20 disconnected yarn YD caught by the first suction device 71 and the
second suction device 75 may be cut, for example, by a cutter, and the
disconnected yarn YD may be sucked and removed by the first suction
device 71 and/or the second suction device 75.
[0056] In the spinning machine 1 in the foregoing embodiment, as
25 illustrated in FIG. 2, the second suction inlet 76 of the second suction
device 75 is disposed so as to be positioned on the extension line in the
23
FP18-0683-00IN-MRT
rotation direction (reverse rotation direction illustrated in FIG. 2) of the
yarn storing roller 61 in reverse rotation when removing the yam Y
(disconnected yarn YD) stored in the yam storing roller 61, and in the
tangent direction. The disconnected yam YD thus can be sucked and
5 removed from the yarn storing roller 61 without relatively increasing the
suction force of the second suction device 75.
[0057] In the spinning machine 1 in the foregoing embodiment, both
ends of the disconnected yarn YD are caught by the first suction device
71 and the second suction device 75, respectively. This can avoid
10 entanglement of the disconnected yarn YD due to portions of the
disconnected yam YD being overlapped with one another or avoid the
disconnected yarn YD being left in the spinning unit 2.
[0058] The spinning machine 1 in the foregoing embodiment includes
the fourth guide 66 to completely draw the downstream-side end YD2
15 from the first suction device 71 that sucks the downstream-side end
YD2 of the disconnected yam YD. The downstream-side end YD2 of
the disconnected yam YD, which both ends are temporarily caught, is
completely drawn from the first suction device 71. This enables the
second suction device 75 to suck and remove the disconnected yam YD.
20 [0059] In the spinning machine 1 in the foregoing embodiment, the
yam storing device 6 and the fourth guide 66 are controlled such that
the downstream-side end YD2 of the disconnected yam YD is
completely drawn from the first suction device 71 simultaneously with
rotation (reverse rotation) of the yam storing roller 61 in the removing
25 direction or after the start of the reverse rotation. Accordingly, the
disconnected yam YD completely drawn from the first suction inlet 72
24
FP18-0683-00IN-MRT
of the first suction device 71 can be guided to the second suction inlet
76 of the second suction device 75.
[0060] In the spinning machine 1 in the foregoing embodiment, after
the yam storing roller 61 of the yam storing device 6 is reversely rotated
5 and the second suction device 75 sucks and removes the disconnected
yam YD, the joining operation by the joining device 7 is started. After
the joining operation is completed, the winding of yam Y by the
winding device 20 is started. Thus, the joining operation and the
winding operation are performed in a state in which the disconnected
10 yam YD is not left in the yam storing device 6. As a result, trouble
can be prevented from occurring in the joining operation, or yam waste
can be prevented from being mixed into the package P.
[0061] The spinning machine 1 in the foregoing embodiment includes
the blowing device 85 to blow the air toward the first suction inlet 72.
15 This facilitates suction of the disconnected yam YD by the first suction
inlet 72. However, the blowing device 85 may be eliminated.
[0062] In the spinning machine 1 in the foregoing embodiment, the first
catch guide device 8 is provided, separately from the first suction device
71. After the yarn Y is disconnected, when the feeding of the yam Y
20 from the spinning device 4 is started (in a state in which formation of
the package P by the winding device 20 is suspended), the first catch
guide device 8 catches the yam Y fed from the air spinning device 4 and
guides (transports) the caught yam Y to the joining device 7.
[0063] Although the embodiment according to an aspect of the present
25 disclosure has been described above, an aspect of the present disclosure
is not limited to the foregoing embodiment.
25
FP18-0683-00IN-MRT
[0064] In the spinning machine 1 in the foregoing embodiment, an
example in which the yarn storing device 6 is disposed below the
winding device 20 in the vertical direction, that is, an example in which
the yarn Y travels from the lower side to the upper side has been
5 described by way of example. However, an aspect of the present
disclosure may be applied to a spinning machine having a configuration
in which the devices are disposed such that the yarn storing device 6 is
disposed above the winding device 20 and the yarn Y fed from the
upper side is wound at the lower side. In the spinning machine
10 according to the modification in which the yarn storing device 6 is
disposed above the winding device 20, even when the yarn Y is
disconnected between the yarn storing device 6 and the winding device
20, the downstream-side end YD2 of the disconnected yarn YD rarely
hangs down. Therefore, it is less likely that the disconnected yarn YD
15 overlaps and thus the disconnected yarn YD is entangled or the
disconnected yarn YD is left in the spinning unit 2.
[0065] In the foregoing embodiment, the disconnected yarn YD is
sucked and removed using the second suction device 75. However, the
disconnected yarn YD may be collected using in combination, a waste
20 yarn collecting device or the like provided in the vicinity of the yarn
storing device 6.
[0066] In the foregoing embodiment, the fourth guide 66 is used as
means for releasing one of both ends of the disconnected yarn YD
caught by the first suction device 71 and the second suction device 75.
25 However, an aspect of the present disclosure is not limited to this
example. As indicated by the dashed line in FIG. 1, a cutting device
26
FP18-0683-00IN-MRT
89 may be separately provided for cutting the disconnected yam YD
between the downstream-side end YD2 and the upstream-side end YD1
of the disconnected yam YD. If the disconnected yarn YD having both
ends caught by the first suction device 71 and the second suction device
5 75 is cut, one of the cut disconnected yam YD can be sucked and
removed by the first suction device 71 and the other disconnected yam
YD can be sucked and removed by the second suction device 75.
[0067] The winding device 20 is not limited to the type in which the
drum 23 is rotationally driven to rotate the bobbin B in contact with the
10 drum 23. Alternatively, the bobbin B may be rotationally driven to
rotate the drum 23 in contact with the bobbin B (package P). In other
words, the drum 23 may be any drum that rotates in contact with the
bobbin B (package P). The surface of the drum 23 may not have a
traverse groove, and a traverse device separately provided may traverse
15 the yam Y when the yam Y is wound onto the bobbin B.
[0068] In the spinning unit 2, the traveling direction of yam Y is
switched in the yam storing device 6. However, the traveling direction
of the yarn Y may not be switched in the yarn storing device 6. A
delivery roller and a nip roller may be disposed between the air spinning
20 device 4 and the yam storing device 6 in order to draw yam Y from the
air spinning device 4. The yam monitoring device 5 may be disposed
between the yam storing device 6 and the winding device 20.
[0069] In the foregoing embodiment, the first suction device 71 has the
first suction inlet 72 configured such that a suction flow is produced at
25 least while the yam Y is traveling from the yarn storing device 6 to the
winding device 20. However, the first suction device 71 may have the
27
FP18-0683-00IN-MRT
first suction inlet 72 that is always in a sucking state. That is, the
spinning machine may include a yam feeding part configured to feed
yarn, a winding device configured to wind the yarn to form a package, a
yam storing device disposed between the yam feeding part and the
5 winding device and having a yarn storing roller having an outer
peripheral surface around which the yam fed from the yam feeding part
is wound to be temporarily stored, a first suction device having a first
suction inlet disposed at a place along a yarn path between the yarn
storing device and the winding device and always provided in a sucking
10 state, and a second suction device having a second suction inlet
disposed to face the yarn storing roller.
[0070] At least some of the embodiments described above may be combined as desired.

We claim:
1. A spinning machine (1) comprising:
a yam feeding part (3,4) configured to feed yam (Y);
5 a winding device (20) configured to wind the yarn (Y) to form a
package (P);
a yam storing device (6) disposed between the yam feeding part
(3, 4) and the winding device (20) and having a yarn storing roller (61)
having an outer peripheral surface around which the yarn (Y) fed from
10 the yam feeding part (4) may be wound to be temporarily stored;
a first suction device (71) having a first suction inlet (72)
disposed at a place along a yarn path between the yam storing device
(6) and the winding device (20), the first suction inlet (72) being
configured to produce a suction flow at least while the yarn (Y) is
15 traveling from the yam storing device (6) to the winding device (20);
and
a second suction device (75) having a second suction inlet (76)
disposed to face the yam storing roller (61).
20 2. The spinning machine (1) according to claim 1 further
comprising a transportation device (8) configured to catch the yarn (Y)
fed from the yam feeding part (4) and transport the caught yarn (Y) to a
position between the yarn storing device (6) and the winding device
(20) in a state in which formation of the package (P) by the winding
25 device (20) is suspended.
29
FP18-0683-00IN-MRT
3. A spinning machine (1) comprising:
a yam feeding part (3,4) configured to feed yam (Y);
a winding device (20) configured to wind the yam (Y) to form a
package (P);
5 a yarn storing device (6) disposed between the yam feeding part
(3,4) and the winding device (20) and having a yam storing roller (61)
having an outer peripheral surface around which the yarn (Y) fed from
the yam feeding part (3, 4) is wound to be temporarily stored;
a transportation device (8) configured to catch the yarn (Y) fed
10 from the yarn feeding part (4) and transport the caught yarn (Y) to a
position between the yarn storing device (6) and the winding device
(20) in a state in which formation of the package (P) by the winding
device (20) is suspended;
a first suction device (71) having a first suction inlet (72)
15 disposed at a place along a yam path between the yam storing device
(6) and the winding device (20); and
a second suction device (75) having a second suction inlet (76)
disposed to face the yam storing roller (61).
20 4. The spinning machine (1) according to any one of claims 1 to 3,
wherein
the yarn storing device (6) includes a driving part (M)
configured to rotate the yam storing roller (61) in a winding direction in
which the yam storing roller (61) is rotated when the yam (Y) is wound
25 around the outer peripheral surface of the yam storing roller (61) and in
a removing direction in which the yam storing roller (61) is rotated
30
FP18-0683-00IN-MRT
when the yam (Y) is removed from the yam storing roller (61), and
the second suction inlet (76) of the second suction device (75) is
disposed such that a direction of velocity of the outer peripheral surface
when the yam storing roller (61) rotates in the removing direction
5 matches a direction of suction of the second suction inlet (76).
5. The spinning machine (1) according to any one of claims 1 to 4,
wherein
when the yam (Y) is disconnected between the yam storing
10 device (6) and the winding device (20), the first suction device (71) is
configured to suck a downstream-side end of the yam (Y) at least
partially stored in the yarn storing device (6), and the second suction
device (75) is configured to suck an upstream-side end of the yam (Y)
at least partially stored in the yam storing device (6).
15
6. The spinning machine (1) according to claim 5 further
comprising a yarn take-off guide (66) configured to completely draw the
downstream-side end of the yam (Y) from the first suction device (71).
20 7. The spinning machine (1) according to claim 6 further
comprising a control part (90) configured to control the yam storing
device (6) and the yam take-off guide (66) such that the
downstream-side end of the yam (Y) is completely drawn from the first
suction device (81) simultaneously with rotation of the yarn storing
25 roller (61) in a removing direction or after start of the rotation.
31
FP18-0683-00IN-MRT
8. The spinning machine (1) according to claim 7 further
comprising a joining device (7) configured to perform a joining
operation of joining the yarn (Y) fed by the yarn feeding part (3, 4) and
the yarn (Y) wound by the winding device (20), wherein
5 the control part (90) is configured to control the yarn feeding
part (3, 4), the yarn storing device (6), the joining device (7), and the
winding device (20), and
the control part (90) is configured to start the joining operation
by the joining device (7) after the yarn storing roller (61) is rotated in
10 the removing direction and the yarn (Y) disconnected between the yarn
storing device (6) and the winding device (20) and left on the yarn
storing roller (61) is sucked and removed by the second suction device
(75), and to start winding of the yam (Y) by the winding device (20)
after the joining operation is completed.
15
9. The spinning machine (1) according to any one of claims 1 to 8
further comprising a blowing device (85) configured to blow air toward
the first suction inlet (72).
20 10. The spinning machine (1) according to any one of claims 1 to 9
comprising an air spinning device (4) configured to form the yarn (Y)
by twisting fiber bundle with an air flow.
11. The spinning machine (1) according to any one of claims 1 to 10
25 further comprising a cutting device (89) configured to cut the yarn (Y)
caught by the first suction device (71) and the second suction device
32
FP18-0683-00IN-MRT
(75).
12. The spinning machine (1) according to any one of claims 1 to
11, wherein the yam storing device (6) is disposed below the winding
5 device (20) in a vertical direction.
13. A yarn catching method performed in a spinning machine (1)
including a yam feeding part (3, 4) configured to feed yam (Y), a
winding device (20) configured to wind the yam (Y) to form a package
10 (P), a yarn storing device (6) disposed between the yam feeding part (3,
4) and the winding device (20) and having a yarn storing roller (61)
having an outer peripheral surface around which the yam (Y) fed from
the yam feeding part (3, 4) is wound to be temporarily stored, a first
suction device (71) having a first suction inlet (72) disposed at a place
15 along a yam path between the yam storing device (6) and the winding
device (20) , and a second suction device (75) having a second suction
inlet (76) disposed to face the yarn storing roller (61), the yarn catching
method comprising:
producing a suction flow at the first suction inlet (72) at least
20 while the yam (Y) is traveling from the yam storing device (6) to the
winding device (20);
when the yam (Y) is disconnected between the yam storing
device (6) and the winding device (20), allowing the first suction device
(71) to suck a downstream-side end of the yarn (Y) at least partially
25 stored in the yarn storing device (6); and
when the yam (Y) is disconnected between the yam storing
33
FP18-0683-00IN-MRT
device (6) and the winding device (20), allowing the second suction
device (75) to suck an upstream-side end of the yam (Y) at least
partially stored in the yam storing device (6).
5 14. A yam catching method performed in a spinning machine (1)
including a yam feeding part (3, 4) configured to feed yam (Y), a
winding device (20) configured to wind the yam (Y) to form a package
(P), a yarn storing device (6) disposed between the yam feeding part (3,
4) and the winding device (20) and having a yam storing roller (61)
10 having an outer peripheral surface around which the yam (Y) fed from
the yam feeding part (3, 4) is wound to be temporarily stored, a
transportation device (8) configured to catch the yam (Y) fed from the
yam feeding part (4) and transport the caught yam (Y) to a position
between the yam storing device (6) and the winding device (20) in a
15 state in which formation of the package (P) by the winding device (20)
is suspended, a first suction device (71) having a first suction inlet (72)
disposed at a place along a yam path between the yam storing device
(6) and the winding device (20), and a second suction device (75)
having a second suction inlet (76) disposed to face the yam storing
20 roller (61), the yam catching method comprising:
when the yam (Y) is disconnected between the yam storing
device (6) and the winding device (20), allowing the first suction device
(71) to suck a downstream-side end of the yam (Y) at least partially
stored in the yam storing device (6); and
25 when the yam (Y) is disconnected between the yam storing
device (6) and the winding device (20), allowing the second suction
34
FP18-0683-00IN-MRT
device (75) to suck an upstream-side end of the yarn (Y) at least
partially stored in the yarn storing device (6).