YARN WINDING MACHINE AND YARN WINDING METHOD
BACKGROUND OF THE INVENTION
1. Field of the Invention
5 The present invention mainly relates to a yarn
winding machine including a yarn joining device.
2. Description of the Related Art
Conventionally, there is known a yarn winding machine
10 adapted to wind a yarn around a bobbin to form a package.
Such a yarn winding machine generally includes a yarn
monitoring device adapted to detect a defect of a yarn and
a yarn joining device adapted to carry out yarn joining.
Japanese Unexamined Patent Publication No. 2013-067892
15 (Patent Document 1) discloses this type of yarn winding
machine.
The yarn winding machine of Patent Document 1 is
configured to include a yarn supplying section; a winding
device adapted to wind a yarn into a package; a package
20 rotation speed detecting section adapted to detect a
rotation speed of the package; a yarn joining device adapted
to join the yarn to form a joint; a joint monitoring device
adapted to monitor the joint; and a determining section
adapted to determine whether or not the joint is normal.
25 The determining section determines whether or not the joint
formed by the yarn joining device is normal based on a
travelling speed of the yarn acquired in accordance with
a detection result of the package rotation speed detecting
section and a monitoring result by the joint monitoring
30 device.
Patent Document 1 describes that quality of the joint
2
can be accurately determined by accurately acquiring the
yarn travelling speed at the time of resuming the winding
in accordance with an actual measurement value of the
rotation speed of the package, and determining the quality
5 of the joint in accordance with the yarn travelling speed.
BRIEF SUMMARY OF THE INVENTION
In the configuration of Patent Document 1, if a defect
of the joint is detected by the joint monitoring device,
10 a yarn joining cart including the yarn joining device cuts
the defective joint with a cutter arranged separately from
the yarn joining device to remove the defective joint.
However, a cost increases if the cutter is separately
arranged. Furthermore, if the yarn is cut by the cutter
15 as in Patent Document 1 when the defective joint is detected,
the yarn may irregularly move around due to rapid release
of a tension applied to the yarn, twist contraction of the
yarn, or the like. The yarn end thus becomes difficult to
be caught and efficiency of the yarn joining is lowered.
20 It is an object of the present invention to provide
a yarn winding machine capable of cutting a yarn without
specially adding a cutter.
A yarn winding machine comprises a yarn supplying
section adapted to supply a yarn; a winding device adapted
25 to wind the yarn into a package; a yarn joining device having
a cutter; and a yarn monitoring device adapted to monitor
the yarn, wherein the cutter of the yarn joining device is
adapted to cut the continuous yarn in accordance with a
monitoring result of the yarn monitoring device.
30 A yarn winding method in a yarn winding machine
including a yarn supplying section adapted to supply a yarn,
3
a winding device adapted to wind the yarn into a package,
a yarn joining device adapted to join the yarn, and a yarn
monitoring device adapted to monitor the yarn, the method
comprises cutting the continuous yarn by the yarn joining
5 device in accordance with a monitoring result of the yarn
monitoring device.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view illustrating a configuration
10 of a spinning unit arranged in a spinning machine according
to one embodiment of the present invention;
FIG. 2 is a perspective view of a yarn joining device
seen from a side;
FIG. 3 is a perspective view of the yarn joining device
15 seen from a front side;
FIG. 4 is a block diagram illustrating a
configuration for controlling a spinning unit;
FIG. 5 is a side view illustrating a state of when
a catching and guiding device catches a yarn;
20 FIG. 6 is a side view illustrating a state of when
the catching and guiding device guides a spun yarn to the
yarn joining device;
FIG. 7 is a side view illustrating a state of an
instance when the spun yarn starts to be wound around a yarn
25 accumulating device;
FIG. 8 is a side view illustrating a state where the
yarn is cut by a cutter of the yarn joining device and held
by a clamp section of the yarn joining device when a defect
of a joint is detected; and
30 FIG. 9 is a side view illustrating a state where a
yarn end held by the yarn joining device is caught by the
4
second catching and guiding device.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
A spinning machine according to an embodiment of the
5 present invention will be described below with reference
to the drawings. "Upstream" and "downstream" respectively
refer to upstream and downstream in a travelling direction
of a fiber bundle and a spun yarn during winding of the yarn.
A spinning machine (yarn winding machine) includes
10 a plurality of spinning units (yarn winding units) 2
arranged in a line, and a machine control device (not
illustrated) that collectively manages the plurality of
spinning units 2. As illustrated in FIG. 1, each spinning
unit 2 winds a yarn (spun yarn 10) supplied from a yarn
15 supplying section 5 by a winding device 26 to form a package
50.
The spinning machine includes a control section
(reference numeral 80 in FIG. 4) that can communicate with
the machine control device. The control section 80 is
20 configured as a computer including hardware such as a
Central Processing Unit (CPU), a Read Only Memory (ROM),
and a Random Access Memory (RAM), and software such as
control program, and is adapted to control each section of
the spinning unit 2 . The control section 80 may be arranged
25 for each spinning unit 2 or may be arranged for a plurality
of spinning units 2.
As illustrated in FIG. 1, the spinning unit 2 includes
the yarn supplying section 5, a yarn accumulating device
22, and a winding device 26 in this order from upstream to
30 downstream.
The yarn supplying section 5 supplies the yarn (the
5
spun yarn 10) to be wound by the winding device 26. In the
present embodiment, the yarn supplying section 5 includes
a draft device 7, a spinning device 9, a delivery roller
21, and a nip roller 31.
5 The draft device 7 includes four draft rollers and
opposing rollers, each facing the corresponding draft
roller. The four draft rollers are a back roller 16, a third
roller 17, a middle roller 19 provided with a rubber apron
belt 18, and a front roller 20 in this order from the upstream
10 Each draft roller is rotatably driven at a predetermined
speed.
The draft device 7 sandwiches and transports a sliver
15, which is supplied from a sliver case (not illustrated)
through a sliver guide, between the draft rollers and the
15 opposing rollers, and the sliver 15 is stretched (drafted)
to a predetermined fiber amount (or thickness) to obtain
a fiber bundle 8 .
The spinning device 9 is arranged immediately
downstream of the front roller 20. The spinning device 9
20 applies twists to the fiber bundle 8 supplied from the draft
device 7 to produce the spun yarn 10. The spinning device
9 of the present embodiment is configured as a pneumatic
spinning device adapted to generate a whirling airflow
therein and to act the whirling airflow on the fiber bundle
25 8 to apply twists to the fiber bundle.
A delivery roller 21, which is rotatably driven at
a predetermined speed, and a nip roller 31, which can make
contact with or move away from the delivery roller 21, are
arranged downstream of the spinning device 9. The delivery
30 roller 21 is rotatably driven while the spun yarn 10
discharged from the spinning device 9 is sandwiched with
6
the delivery roller 21 and the nip roller 31 to feed the
spun yarn 10 towards the downstream.
The spun yarn 10 is supplied to the winding device
26 by the yarn supplying section 5 (the draft device 7, the
5 spinning device 9, the delivery roller 21, and the nip
roller 31) configured as above. The delivery roller 21 and
the nip roller 31 may be omitted, and the spun yarn 10 may
be pulled out from the spinning device 9 by the yarn
accumulating device 22.
10 A yarn quality monitoring device 40 adapted to
monitor the quality of the spun yarn 10 is arranged
immediately downstream of the delivery roller 21 and the
nip roller 31. The yarn quality monitoring device 40
monitors a state (thickness or the like) of the travelling
15 spun yarn 10 by a light transmissive sensor, and detects
a yarn defect (abnormal area in the spun yarn 10) contained
in the spun yarn 10. The yarn quality monitoring device
40 is not limited to the light transmissive sensor and may
be a capacitance sensor to monitor the spun yarn 10.
20 Foreign substances contained in the spun yarn 10 may be
monitored as the yarn defect.
The spinning is stopped in the spinning device 9 when
the yarn defect is detected by the yarn quality monitoring
device 40, and thus a strength of the spun yarn 10 is lowered
25 at the portion of the spinning device 9 and the spun yarn
10 is disconnected. The spinning device 9 thus has a
function of a cutting section adapted to cut the spun yarn
10 when the yarn quality monitoring device 40 detects the
yarn defect. Thus, the cutter is not required to be
30 specially provided in the yarn quality monitoring device
40 and the like, for example, and a simple configuration
7
can be realized. However, the cutter may be arranged in
the yarn quality monitoring device 40 and the like.
The winding device 26 winds the spun yarn 10 around
a bobbin 51 while traversing to form the package 50. The
5 winding device 26 includes a cradle arm 52 and a winding
drum 53.
The cradle arm 52 includes a supporting section 55
adapted to rotatably support the bobbin 51, and can bring
an outer peripheral surface of the package 50 into contact
10 with an outer peripheral surface of the winding drum 53.
The package 50 is rotated by driving and rotating the
winding drum 53 with the package 50 making contact with the
winding drum 53. The spun yarn 10 is thus wound into the
package 50. A traverse groove (not illustrated) is formed
15 on the outer peripheral surface of the winding drum 53. The
traverse groove allows the spun yarn 10 to be wound into
the package 50 to be traversed at a predetermined width.
The winding device 26 includes a brake mechanism (not
illustrated) for applying brake on the rotation of the
20 package 50. Although a structure of the brake mechanism
is arbitrary, the brake mechanism may include, for example,
a brake shoe that makes contact with a member that
integrally rotates with the package 50, and a pneumatic
cylinder for pushing the brake shoe.
25 The yarn accumulating device 22 is arranged
immediately downstream of the yarn quality monitoring
device 40 and between the yarn supplying section 5 and the
winding device 26. The yarn accumulating device 22
includes a yarn accumulating roller 41 and an accumulating
30 motor 42 for rotatably driving the yarn accumulating roller
41. The yarn accumulating device 22 winds the spun yarn
8
10 around an outer peripheral surface of the yarn
accumulating roller 41 to temporarily accumulate the spun
yarn 10.
A yarn hooking member 43 is attached to a downstream
5 end of the yarn accumulating roller 41. The yarn hooking
member 43 is supported in a relatively rotatable manner with
respect to the yarn accumulating roller 41. A permanent
magnet is attached to one of the yarn hooking member 43 and
the yarn accumulating roller 41, and a magnetic hysteresis
10 material is attached to the other of the yarn hooking member
4 3 and the yarn accumulating roller 41. Such magnetic means
generates a torque against the relative rotation of the yarn
hooking member 43 with respect to the yarn accumulating
roller 41. Therefore, only when a force greater than the
15 torque is applied to the yarn hooking member 43 (when a yarn
tension greater than or equal to a predetermined value is
applied), the yarn hooking member 43 relatively rotates
with respect to the yarn accumulating roller 41, and the
spun yarn 10 wound around the yarn accumulating roller 41
20 can be unwound. When a force greater than the torque is
not applied to the yarn hooking member 43, the yarn
accumulating roller 41 integrally rotates with the yarn
hooking member 43, and the spun yarn 10 is accumulated
around the yarn accumulating roller 41.
25 Thus, the yarn accumulating device 22 operates to
unwind the spun yarn 10 when the yarn tension at the
downstream is increased, and stop the unwinding of the spun
yarn 10 when the yarn tension is decreased (the spun yarn
10 starts to slacken). Thus, the yarn accumulating device
30 22 can resolve the slackening of the spun yarn 10 and apply
an appropriate tension to the spun yarn 10. Furthermore,
9
since the yarn hooking member 43 operates to absorb
fluctuation in the yarn tension applied to the spun yarn
10 between the yarn accumulating device 22 and the winding
device 26, the yarn hooking member 43 can prevent the
5 fluctuation in the yarn tension from affecting the spun yarn
10 between the spinning device 9 and the yarn accumulating
device 22.
The accumulating motor 42 is configured as an
electric motor that can rotate f orwardly and reversely, and
10 can also reversely rotate the yarn accumulating roller 41
to forcibly unwind the spun yarn 10 wound around the yarn
accumulating roller 41.
A second guide 62 that suppresses movement of the spun
yarn 10 unwound from the yarn accumulating roller 41 is
15 arranged downstream of the yarn accumulating roller 41.
A yarn joining device 23 is arranged downstream of
the second guide 62. The yarn joining device 23 carries
out the yarn joining of a spun yarn 10 (first yarn) from
the spinning device 9 and a spun yarn 10 (second yarn) from
20 the package 50 when the spun yarn 10 between the spinning
device 9 and the package 50 is disconnected for some reason.
In the present embodiment, the yarn joining device 23 is
a splicer device adapted to twist yarn ends by a whirling
airflow generated by compressed air. However, the yarn
25 joining device 23 is not limited to the splicer device, and
for example, a mechanical knotter and the like may be
adopted.
The spinning unit 2 includes a catching and guiding
device adapted to guide the spun yarn 10 to the yarn joining
30 device 23. The catching and guiding device is configured
by a first catching and guiding device 27 adapted to guide
10
the first yarn, and a second catching and guiding device
(yarn catching section) 28 adapted to guide the second yarn.
A basal end portion of the first catching and guiding
device 27 is swingably supported. The first catching and
5 guiding device 27 can be vertically swung with this basal
end portion as a center of swing. The first catching and
guiding device 27 is formed in a hollow form, and is
connected to a blower (not illustrated) serving as a
negative pressure source so as to be able to generate a
10 suction airflow at the distal end portion. The first
catching and guiding device 27 is swung downward to move
to a position where a yarn end of the first yarn can be caught
(see chain line in FIG. 1) . After catching the first yarn,
the first catching and guiding device 27 is swung upward
15 to guide the first yarn to the yarn joining device 23.
A basal end portion of the second catching and guiding
device 28 is swingably supported. The second catching and
guiding device 28 can be vertically swung with this basal
end portion as a center of swing. The second catching and
20 guiding device 28 is also formed in a hollow form, and is
connected to a blower (not illustrated) serving as a
negative pressure source so as to be able to generate a
suction airflow at the distal end portion. The second
catching and guiding device 28 is swung upward to move to
25 a position where a yarn end of the second yarn can be caught
(see the chain line in FIG. 1) . After catching the second
yarn, the second catching and guiding device 28 is swung
downward to guide the second yarn to the yarn joining device
23.
30 The yarn joining device 23 is driven under this state,
so that the first yarn and the second yarn are joined and
11
the spun yarn 10 is connected between the spinning device
9 and the package 50. The winding of the spun yarn 10 into
the package 50 thus can be resumed.
A joint monitoring device (yarn monitoring device)
5 25 is arranged between the yarn joining device 23 and the
winding device 26. The joint monitoring device 25 is
arranged downstream of the yarn joining device 23, and
non-defectiveness/defectiveness of the joint formed by the
yarn joining of the yarn joining device 23 is determined.
10 The joint monitoring device 25 is configured to detect a
thickness and the like of the joint by the capacitance
sensor or the light transmissive sensor, similarly to the
yarn quality monitoring device 40 in the present embodiment
However, the configuration of the joint monitoring device
15 25 is not particularly limited to the configuration
including such a sensor. The joint monitoring device 25
may monitor not only the joint, but also a thickness
abnormality of the spun yarn 10 and/or presence and/or
absence of the foreign substances contained in the spun yarn
20 10, similarly to the yarn quality monitoring device 40.
A third guide 63 for guiding the spun yarn 10 is
arranged immediately downstream of the joint monitoring
device 25. The third guide 63 bends a travelling path of
the spun yarn 10 and guides the spun yarn 10 towards the
25 winding device 26.
Next, with reference to FIGS. 2 and 3, the yarn joining
device 23 will be described in detail. The yarn joining
device 23 includes a yarn joining nozzle 92, guide plates
(guide members) 93, 94, yarn moving levers 95, 96, clamp
30 sections 97, 98, yarn holding levers 103, 104, cutters 99,
100, and untwisting chambers 105, 106 as main components.
12
As illustrated in FIG. 3, the yarn joining nozzle 92
is arranged on a front side of the yarn joining device 23
(side facing the travelling path of the spun yarn 10) . The
yarn joining nozzle 92 is provided with a V-shaped groove
5 opened towards the travelling path of the spun yarn 10 and
includes a twist applying chamber 92a at an inner side of
the groove. The twist applying chamber 92a is formed in
a circular column shape with both ends in the yarn
travelling direction opened. A slit is formed on a front
10 side of the twist applying chamber 92a so that the spun yarn
10 can be inserted inside the twist applying chamber 92a.
The yarn joining nozzle 92 injects compressed air into the
twist applying chamber 92a to generate the whirling airflow
in the twist applying chamber 92a, and joins the first yarn
15 guided by the first catching and guiding device 27 and the
second yarn guided by the second catching and guiding device
28 to form the joint.
The guide plate 93, the yarn moving lever 95, the clamp
section 97, the yarn holding lever 103, the cutter 99, and
20 the untwisting chamber 105 are arranged upstream of the yarn
joining nozzle 92. The guide plate 94, the yarn moving
lever 96, the clamp section 98, the yarn holding lever 104,
the cutter 100, and the untwisting chamber 106 are arranged
downstream of the yarn joining nozzle 92.
25 The guide plates 93 and 94 are both formed in a plate
shape, and are arranged substantially perpendicular to the
travelling path of the spun yarn 10 during normal winding.
The description "during normal winding" refers to a state
where the spun yarn 10 between the yarn supplying section
30 5 and the winding device 26 is continuous and the winding
device 26 is winding the spun yarn 10.
13
The guide plate 93 is provided with two slits, a first
slit 101 and a second slit 102, arranged next to one another
and opened at a travelling path side of the spun yarn 10.
The guide plate 94 is provided with two slits, a first slit
5 201 and a second slit 202, arranged next to one another and
opened at the travelling path side of the spun yarn 10. As
illustrated in FIG. 3, the first slit 101 of the guide plate
93 and the first slit 201 of the guide plate 94 are arranged
at substantially corresponding positions in a direction of
10 the travelling path of the spun yarn 10. The second slit
102 of the guide plate 93 and the second slit 202 of the
guide plate 94 are arranged at substantially corresponding
positions in the direction of the travelling path of the
spun yarn 10.
15 When joining the disconnected spun yarn 10 in the yarn
joining device 23, the first catching and guiding device
27 guides the first yarn into the first slits 101 and 201,
and the second catching and guiding device 28 guides the
second yarn into the second slits 102 and 202.
20 The two yarn moving levers 95 and 96 are configured
to be simultaneously swingable in a direction (closing
direction) of entering between the guide plates 93 and 94
and a direction (opening direction) of exiting from between
the guide plates 93 and 94 with a shaft arranged to the side
25 of the yarn joining nozzle 92 as a center. By being swung
in the closing direction, the yarn moving levers 95 and 96
can push the first yarn guided by the first catching and
guiding device 27 to an inner side of the first slits 101
and 201 and can push the second yarn guided by the second
30 catching and guiding device 28 to an inner side of the second
slits 102 and 202 . By being swung in the closing direction,
14
the yarn moving levers 95 and 96 can guide the first yarn
and the second yarn into the twist applying chamber 92a.
The clamp section 97 is attached to the guide plate
93. The clamp section 98 is attached to the guide plate
5 94. Each of the clamp sections 97 and 98 can sandwich and
clamp the spun yarn 10. Specifically, the clamp section
97 can clamp and hold the spun yarn 10 that has entered the
first slits 101 and 201. The clamp section (holding
section) 98 can clamp and hold the spun yarn 10 that has
10 entered the second slits 102 and 202.
The yarn holding levers 103 and 104 are arranged to
be simultaneously swingable about a shaft arranged in
proximity to a swing shaft of the yarn moving levers 95 and
96. In order to carry out the yarn joining by the yarn
15 joining nozzle 92, the yarn holding levers 103 and 104 are
configured to hold the first yarn and the second yarn by
being swung in the closing direction and define positions
of the first yarn and the second yarn.
The cutter 99 is attached to the guide plate 93. The
20 cutter 100 is attached to the guide plate 94. The cutters
99 and 100 can cut the spun yarn 10. Specifically, the
cutter 99 can cut the spun yarn 10 that has entered the first
slits 101 and 201, and the cutter 100 can cut the spun yarn
10 that has entered the second slits 102 and 202.
25 As illustrated in FIG. 2, each of the untwisting
chambers 105 and 106 is formed in an elongate space. An
opening of the untwisting chamber 105 and an opening of the
untwisting chamber 106 are arranged with the yarn joining
nozzle 92 therebetween. The first yarn can be sucked into
30 the untwisting chamber 105, and the second yarn can be
sucked into the untwisting chamber 106. The whirling
15
airflow is generated in the untwisting chambers 105 and 106
by injecting the compressed air into the untwisting
chambers 105 and 106. Before the yarn joining is carried
out by the yarn joining nozzle 92, the yarn end of the first
5 yarn is sucked into the untwisting chamber 105 and untwisted
by the whirling airflow, and the yarn end of the second yarn
is sucked into the untwisting chamber 106 and untwisted by
the whirling airflow.
The yarn joining device 23 includes a cam (not
10 illustrated). When the cam is rotated, the yarn moving
operation of the yarn moving levers 95 and 96, the clamping
operation of the clamp sections 97 and 98, the cutting
operation of the cutters 99 and 100, and the holding
operation of the yarn holding levers 103 and 104 are carried
15 out. The yarn joining device 23 also includes a valve (not
illustrated) which is opened and closed to control supply
and stop of the compressed air to the yarn joining nozzle
92 and the untwisting chambers 105 and 106. The valve is
also opened in conjunction with rotation of the cam.
20 The following yarn joining operation is carried out
by the yarn joining device 23 configured as described above.
That is, the first yarn in the first slits 101 and 201 and
the second yarn in the second slits 102 and 202 are moved
by the yarn moving levers 95 and 96 swung in the closing
25 direction so as to be introduced into the yarn joining
nozzle 92. The first yarn and the second yarn are clamped
by the clamp sections 97 and 98 under this state.
Thereafter, the cutter 99 cuts the first yarn, and the
cutter 100 cuts the second yarn. An excess portion of the
30 first yarn is sucked by the first catching and guiding
device 27 and discarded. An excess portion of the second
16
yarn is sucked by the second catching and guiding device
28 and discarded. The first yarn cut to a predetermined
length is sucked into the untwisting chamber 105 and
untwisted by the whirling airflow. The second yarn cut to
5 a predetermined length is sucked into the untwisting
chamber 106 and untwisted by the whirling airflow.
Thereafter, an untwisted portion of the first yarn is pulled
out from the untwisting chamber 105 and an untwisted portion
of the second yarn is pulled out from the untwisting chamber
10 106 by further swinging the yarn moving levers 95 and 96
in the closing direction. The untwisted portion of the
first yarn and the untwisted portion of the second yarn are
introduced to the twist applying chamber 92a of the yarn
joining nozzle 92. The yarn holding levers 103 and 104 are
15 swung in the closing direction under this state, and the
positions of the first yarn and the second yarn are
determined by the yarn holding levers 103 and 104. Then,
the untwisted portions are twisted by the whirling airflow
generated in the twist applying chamber 92a, so that the
20 first yarn and the second yarn are joined and thereby
becomes continuous. Thereafter, the yarn holding levers
103 and 104 are swung in the opening direction to release
the spun yarn 10, and the yarn moving levers 95 and 96 are
also swung in the opening direction so that the spun yarn
25 10 returns to the travelling path during the normal winding.
Next, a description will be made on an electrical
configuration of the spinning unit 2 with reference to FIG.
4. In addition to the control section 80, the yarn guality
monitoring device 40, the accumulating motor 42, and the
30 joint monitoring device 25, the spinning unit 2 further
includes a draft motor 111, a spinning valve 112, a delivery
17
motor 113, a catching and guiding motor 114, a yarn joining
cam motor 115, a winding drum motor 116, and a winding brake
valve 117.
The draft motor 111 is, for example, a plurality of
5 electric motors, and can drive each of the back roller 16,
the third roller 17, the middle roller 19, and the front
roller 20 of the draft device 7 at a predetermined speed.
The spinning valve 112 is configured as an
electromagnetic valve arranged on a path for supplying the
10 compressed air from an appropriate compressed air source
to the spinning device 9. The spinning valve 112 can switch
whether or not to generate the whirling airflow for twisting
and spinning the fiber bundle 8 in the spinning device 9.
The delivery motor 113 is an electric motor that can
15 drive the delivery roller 21 at a predetermined speed.
The catching and guiding motor 114 is a
forward/reverse rotatable electric motor that can
vertically swing the first catching and guiding device 27
and the second catching and guiding device 28.
20 The yarn joining cam motor 115 is an electric motor
that can rotatably drive the cam (not illustrated) arranged
. in the yarn joining device 23. As described above, the cam
operates the yarn moving levers 95, 96, the yarn holding
levers 103, 104, the clamp sections 97, 98, the cutters 99,
25 100, and the like of the yarn joining device 23. The yarn
joining cam motor 115 is configured as a motor that can
forwardly rotate and can also reversely rotate, and thus
may carry out an operation opposite to the normal operation
with respect to the yarn joining device 23 in a
30 predetermined case.
The winding drum motor 116 is an electric motor that
18
can rotatably drive the winding drum 53. The winding drum
motor 116 can forwardly rotate and reversely rotate the
winding drum 53.
The winding brake valve 117 is an electromagnetic
5 valve arranged on a path for supplying the compressed air
to an appropriate actuator (e.g., pneumatic cylinder) for
actuating the brake mechanism of the winding device 26. The
winding brake valve 117 is configured to be able to switch
the brake and the release of the brake of the package 50
10 in the winding device 26.
The control section 80 controls each section of the
spinning unit 2 as described above. Specifically, the
draft motor 111, the delivery motor 113, the accumulating
motor 42, the catching and guiding motor 114, the yarn
15 joining cam motor 115, and the winding drum motor 116 are
electrically connected to the control section 80, and the
control section 80 can control the rotation/stop, the
rotation speed, or the like of each motor. The spinning
valve 112 and the winding brake valve 117 are also
20 electrically connected to the control section 80, and the
control section 80 can control the opening/closing of each
valve. Furthermore, the yarn quality monitoring device 40
and the joint monitoring device 25 are electrically
connected to the control section 80, and output the
25 monitoring result associated with the yarn quality and the
non-defectiveness/defectiveness of the joint to the
control section 80.
Next, a description will be made on the operation of
the spinning unit 2 during the yarn joining with reference
30 to FIGS. 5 to 7.
Two typical cases in which the spun yarn 10 is
19
disconnected include: a case where yarn breakage occurs
during the winding of the spun yarn 10 into the package 50;
and a case where the spun yarn 10 is cut at the portion of
the spinning device 9 as a result of the yarn quality
5 monitoring device 40 detecting the yarn defect and the
spinning in the spinning device 9 being stopped. When the
joint monitoring device 25 detects the joint defect, the
spun yarn 10 is also cut and disconnected, and then the yarn
joining is carried out again. However, the operation of
10 the spinning unit 2 in this case is different from the normal
yarn joining. This will be described later.
For example, when the yarn quality monitoring device
40 detects the yarn defect, the control section 80 carries
out a control to close the spinning valve 112, and stop the
15 winding drum motor 116 and the draft motor 111. As a result,
the spinning device 9 stops the spinning, the winding device
26 stops the winding of the package 50, and the draft device
7 stops the drafting of the fiber bundle 8 . When the control
section 80 controls the actuator (not illustrated), a first
20 guide 61 moves from the state of FIG. 1 to a position away
from the yarn accumulating device 22 (see FIG. 5) .
Furthermore, the control section 80 carries out a
control to rotate the catching and guiding motor 114 and
swing the second catching and guiding device 28 upward from
25 the state of FIG. 1. The distal end of the second catching
and guiding device 28 is thereby brought close to the outer
peripheral surface of the package 50 as illustrated in FIG.
5, and thus the second catching and guiding device 28 can
suck and catch the second yarn. Thereafter, the control
30 section 80 carries out a control to reversely rotate the
winding drum motor 116 to reversely rotate the package 50
20
by a predetermined amount. The control section 80 further
drives the catching and guiding motor 114. The second
catching and guiding device 28 thereby guides the second
yarn to a position where the yarn joining by the yarn joining
5 device 23 can be carried out as illustrated in FIG. 6. As
a result, the second yarn is introduced to the second slit
102 formed in the guide plate 93 and the second slit 202
formed in the guide plate 94 of the yarn joining device 23.
Before or after this operation, the control section
10 80 controls the draft motor 111 and the spinning valve 112,
and resumes the drafting of the fiber bundle 8 by the draft
device 7 and the spinning by the spinning device 9. The
control section 80 controls to rotate the catching and
guiding motor 114 prior to this to swing the first catching
15 and guiding device 27 downward from the state of FIG. 1.
Thus, the first catching and guiding device 27 can suck and
catch the first yarn produced by the spinning device 9, as
illustrated in FIG. 5. The control section 80 further
rotates the catching and guiding motor 114, and the first
20 catching and guiding device 27 guides the first yarn to a
position where the yarn joining by the yarn joining device
23 can be carried out as illustrated in FIG. 6. As a result,
the first yarn is introduced to the first slit 101 formed
in the guide plate 93 and the first slit 201 formed in the
25 guide plate 94 of the yarn joining device 23.
The first yarn and the second yarn are thereby guided
to the yarn joining device 23, as illustrated in FIG. 6.
After the first catching and guiding device 27 and
the second catching and guiding device 28 guide the first
30 yarn and the second yarn to the yarn joining device 23,
respectively, the control section 80 controls the first
21
guide 61 to move closer to the yarn accumulating device 22
(see FIG. 7) . The spun yarn 10 is thereby guided to
proximity of the yarn accumulating device 22, and the spun
yarn 10 can be hooked to the yarn hooking member 43 of the
5 yarn accumulating device 22. As a result, the spun yarn
10 starts to be accumulated around the yarn accumulating
roller 41.
At substantially the same time, the control section
80 controls to rotate the yarn joining cam motor 115. The
10 yarn joining device 23 thereby carries out the yarn joining
operation as described above, and joins the first yarn and
the second yarn.
After the yarn joining is completed, the control
section 80 controls to start the rotation of the winding
15 drum motor 116. As a result, the winding drum 53 and the
like that have been stopped are again driven to return to
the state of FIG. 1, and the winding of the package 50 is
resumed.
Next, a description will be made on monitoring
20 (inspecting) the formed joint and removing the defective
joint after the yarn joining is carried out in the yarn
joining device 23 of the spinning unit 2.
After the yarn joining of the spun yarn 10 is carried
out by the yarn joining device 23, the control section 80
25 controls the winding drum motor 116 to rotate the package
50 stopped in the winding device 26. However, the control
section 80 controls the winding drum motor 116 such that
the acceleration of the rotation of the package 50 becomes
smaller than normal until the joint is inspected by the
30 joint monitoring device 25.
As the spun yarn 10 is wound by the winding device
22
26, the joint formed by the yarn joining of the yarn joining
device 23 passes through the joint monitoring device 25.
The joint monitoring device 25 inspects the joint, and
determines non-defectiveness/defectiveness of the joint.
5 If determined by the joint monitoring device 25 that the
joint is non-defective, the control section 80 controls the
winding drum motor 116 to raise the rotation speed of the
package 50 at the normal (large) acceleration. In the
spinning unit 2, the spun yarn 10 is wound while being
10 monitored by the yarn quality monitoring device 40.
If determination is made by the joint monitoring
device 25 that the joint is defective, the control section
80 controls the winding drum motor 116 and the winding brake
valve 117 so as to immediately stop the rotation of the
15 package 50. The acceleration of the rotation of the package
50 is more or less gradual at the beginning as described
above, and thus the rotation speed of the package 50 is not
so high at the time point when the
non-defectiveness/defectiveness of the joint is determined
20 by the joint monitoring device 25. Since the brake
mechanism immediately applies brake on the rotation of the
package 50, the time from detection of the defective joint
until stop of rotation of the package 50 can be shortened.
If the defect of the joint is detected by the joint
25 monitoring device 25, the control section 80 controls the
spinning valve 112 and stops the supply of compressed air
with respect to the spinning device 9. As a result, the
spun yarn 10 is cut in the spinning device 9. Furthermore,
the control section 80 stops the draft motor 111, the
30 delivery motor 113, and the like.
The control section 80 then controls the yarn joining
23
cam motor 115 to rotate the cam of the yarn joining device
23 by a predetermined angle, and carries out a part of the
yarn joining operation (i.e. , the yarn moving operation of
the yarn moving levers 95 and 96, the clamping operation
5 of the clamp sections 97 and 98, and the cutting operation
of the cutters 99 and 100) . As a result, the (continuous)
spun yarn 10 on the travelling path during the normal
winding is moved to the yarn joining device 23 by the yarn
moving levers 95 and 96. Although the details will be
10 described later, the guide plate 94 and the yarn moving
lever 95 have a predetermined shape, and the spun yarn 10
enters, not the first slits 101 and 201, but the second slits
102 and 202 when the continuous spun yarn 10 is moved to
the yarn joining nozzle 92 (the twist applying chamber 92a)
15 by the yarn moving levers 95 and 96. Therefore, the
continuous spun yarn 10 is inserted to the second slits 102
and 202 by the yarn moving levers 95 and 96, clamped by the
clamp section 98, and cut by the cutter 100.
The second yarn is thereby clamped by the clamp
20 section 98, and the first yarn falls off from the yarn
joining device 23. The first yarn is not required to be
clamped since the first yarn is discarded, as will be
described later.
The control section 80 controls to reversely rotate
25 the accumulating motor 42 while maintaining the state in
which the yarn joining device 23 is clamping the second yarn.
As a result, the yarn accumulating roller 41 of the yarn
accumulating device 22 reversely rotates, and thus the spun
yarn 10 (the first yarn) accumulated around the yarn
30 accumulating roller 41 is unwound and sucked into a suction
section (not illustrated) and discarded.
24
The control section 80 carries out a control to drive
the catching and guiding motor 114 from the state of FIG.
8, and once swing the second catching and guiding device
28 upward. However, in this case, the control section 80
5 controls the second catching and guiding device 28 to once
come to a rest in a middle of the upward swinging stroke
at a position of solid line of FIG. 9 where the distal end
is positioned in proximity to the clamp section 98 of the
yarn joining device 23. The control section 80 carries out
10 the control to reversely rotate the yarn joining cam motor
115 under this state, release the clamping of the second
yarn by the clamp section 98, and rotate the yarn moving
levers 95 and 96 in the opening direction. The second yarn
is thereby caught by the second catching and guiding device
15 28.
Thus, in the present embodiment, the yarn end of the
second yarn is clamped by the clamp section 98 until being
caught by the second catching and guiding device 28.
Therefore, for example, the position of the yarn end is
20 stabilized as compared to a case where the yarn end of the
second yarn is wound into the package 50. Accordingly, a
catching mistake by the second catching and guiding device
28 can be satisfactorily reduced as much as possible.
After releasing the clamping by the clamp section 98,
25 the control section 80 carries out a control to reversely
rotate the winding drum motor 116 to reversely rotate the
package 50 by a predetermined amount. The amount by which
the package 50 is reversely rotated in this case is the
amount by which the joint determined as defective by the
30 joint monitoring device 25 is pulled out from the package
50 by a sufficient distance.
2 5
Thereafter, the control section 80 carries out a
control to drive the catching and guiding motor 114, and
swing the second catching and guiding device 28 downward.
The second catching and guiding device 28 thereby guides
5 the second yarn to a position where the yarn joining by the
yarn joining device 23 can be carried out. As a result,
the second yarn is introduced to the second slit 102 formed
in the guide plate 93 and the second slit 202 formed in the
guide plate 94 of the yarn joining device 23.
10 Before or after this operation, the control section
80 resumes the drafting of the fiber bundle 8 by the draft
device 7 and the spinning by the spinning device 9. The
control section 80 controls the first catching and guiding
device 27 to be swung downward from the state of FIG. 8 prior
15 to this. Thus, the first catching and guiding device 27
can catch the first yarn produced by the spinning device
9. As a result, the first yarn is introduced to the first
slit 101 formed in the guide plate 93 and the first slit
201 formed in the guide plate 94 of the yarn joining device
20 23.
As a result of the above operation, the first yarn
and the second yarn are arranged similarly to the state of
FIG. 6, and thus the control section 80 carries out the
control to cause the yarn joining device 23 to carry out
25 the normal yarn joining operation. The yarn joining
operation is similar to the case when the yarn defect is
detected by the yarn quality monitoring device 40 described
above, and thus the description thereof will be omitted.
After the yarn joining is completed, the state of the spun
30 yarn 10 returns to the state of FIG. 1, and thus the control
section 80 controls the winding drum motor 116 to rotate
26
the package 50 stopped in the winding device 26. The newly
formed joint is inspected by the joint monitoring device
25 similarly to the previous joint.
Thus, when the joint monitoring device 25 detects the
5 defect of the joint, the spinning unit 2 in the spinning
machine of the present embodiment does not cut the spun yarn
10 by the specially provided cutter, but cuts the spun yarn
10 by the cutter 100 for cutting the excess yarn during the
yarn joining in the yarn joining device 23. Therefore, a
10 cutter is not required to be specially added to the spinning
unit 2, whereby a simple configuration can be realized and
a cost can be reduced. Furthermore, a portion of the spun
yarn 10 located downstream of a cut area (position close
to the package 50) is clamped by the clamp section 98 before
15 the spun yarn 10 is cut by the cutter 100 of the yarn joining
device 23. Therefore, the second yarn is clamped by the
clamp section 98 from the time of the yarn cut, and the second
catching and guiding device 28 catches the second yarn in
a manner of receiving the second yarn from the clamp section
20 98. Therefore, the second yarn does not move irregularly
by the cutting of the spun yarn 10, and thus the second
catching and guiding device 28 can smoothly catch the second
yarn, and the defective joint can be efficiently removed.
Next, a description will be made on the configuration
25 for smoothly introducing the continuous spun yarn 10 to the
second slits 102 and 202 to cut the spun yarn 10 by the cutter
100 when the joint defect is found.
As described above, if the joint defect is detected
by the joint monitoring device 25, the spun yarn 10 is cut
30 by the yarn joining device 23 while the portion of the spun
yarn 10 located downstream of the cut area is being clamped.
27
Therefore, the continuous spun yarn 10 is required to be
introduced to the second slits 102 and 202. If the spun
yarn 10 enters the first slits 101 and 201, the spun yarn
10 is cut by the cutter 99, and the first yarn located
5 upstream of the cut area (the position close to the yarn
supplying section 5) is clamped by the clamp section 97.
In this case, the second yarn is not clamped, and thus the
spun yarn 10 cannot be prevented from moving around by an
impact of cutting. In other words, the second yarn cannot
10 be smoothly caught by the second catching and guiding device
28.
The spun yarn 10 may enter the first slit 101 of the
guide plate 93, and enter the second slit 202 of the guide
plate 94. In this case, the spun yarn 10 cannot be cut by
15 the cutters 99 and 100.
The spun yarn 10 may enter the second slit 102 of the
guide plate 93, and enter the first slit 201 of the guide
plate 94. In this case, the spun yarn 10 is cut by the
cutters 99 and 100 at two areas, and hence the spun yarn
20 10 between the cut areas may remain in the yarn joining
nozzle 92 and inhibit the yarn joining.
In the yarn joining device 23 of the present
embodiment, the shapes of the downstream guide plate 94 and
the upstream yarn moving lever 95 are configured as below
25 to reliably introduce the continuous spun yarn 10 to both
the second slit 102 of the guide plate 93 and the second
slit 202 of the guide plate 94.
Hereinafter, description will be made in detail with
reference to FIG. 3. A projection 93a is formed between
30 the two slits 101 and 102 of the guide plate 93. A
projection 94a is formed between the two slits 201 and 202
28
of the guide plate 94. The projection 93a is provided with
a guiding surface 93b that guides the spun yarn 10 to the
first slit 101 and a guiding surface 93c that guides the
spun yarn 10 to the second slit 102. The two guiding
5 surfaces 93b and 93c are both formed in a tapered shape.
The guiding surface 93b is smoothly continued to an inner
wall of the first slit 101. The guiding surface 93c is
smoothly continued to an inner wall of the second slit 102.
A projection length of the projection 94a is longer than
10 a projection length of the projection 93a. The projection
94a is provided with only a guiding surface (first
cut-guiding section) 94c adapted to guide the spun yarn 10
to the second slit 202. The guiding surface 94c is formed
in a tapered shape, and is smoothly continued to the inner
15 wall of the second slit 202.
The yarn moving levers 95 and 96 are both formed in
a shape bent towards one side. A yarn guiding section 95a
adapted to make contact with the spun yarn 10 and guide the
spun yarn 10 is formed on an inner peripheral side of the
20 yarn moving lever 95. A yarn guiding section 96a adapted
to make contact with the spun yarn 10 and guide the spun
yarn 10 is formed on an inner peripheral side of the yarn
moving lever 96. The yarn moving lever 95 is formed to be
longer than the yarn moving lever 96. The yarn guiding
25 section 95a is provided with a V-shaped bent portion (second
cut-guiding section) 95b.
The operation of the above configuration will be
described. When the yarn moving levers 95 and 96 are swung
in the closing direction from the state of FIG. 3, the
30 upstream yarn moving lever 95 first makes contact with the
continuous spun yarn 10. In a course where the upstream
29
yarn moving lever 95 approaches the guide plates 93 and 94
while making contact with the spun yarn 10, the spun yarn
10 applied with a tension naturally moves to an area of the
bent portion 95b. The bent portion 95b is arranged at a
5 position substantially corresponding to the second slit 202
in a state immediately before the yarn moving levers 95 and
96 enter between the guide plate 93 and the guide plate 94.
Therefore, the spun yarn 10 that moved to the bent portion
95b smoothly enters the second slit 202.
10 The spun yarn 10 moved by the yarn moving levers 95
and 96 first makes contact with the downstream projection
94a. The spun yarn 10 is introduced into the second slit
102 by the guiding surface 94c of the projection 94a.
The guide plate 94 and the yarn moving lever 95 of
15 the yarn joining device 23 have shape characteristics
described above, and thus when the yarn moving levers 95
and 96 move the continuous spun yarn 10, the spun yarn 10
is guided to enter the second slit 102 formed in the guide
plate 93 and the second slit 202 formed in the guide plate
20 94. Therefore, the spun yarn 10 can be reliably cut by the
cutter 100 while being clamped by the clamp section 98.
As described above, the spinning unit 2 of the
spinning machine of the present embodiment includes the
yarn supplying section 5, the winding device 26, the yarn
25 joining device 23, and the joint monitoring device 25. The
yarn supplying section 5 is adapted to supply the spun yarn
10. The winding device 26 is adapted to wind the spun yarn
10 into the package 50. The yarn joining device 23 has the
cutter 100. The joint monitoring device 25 monitors the
30 spun yarn 10. The spinning machine (the spinning unit 2)
cuts the continuous spun yarn 10 by the cutter 100 of the
30
yarn joining device 23 in accordance with the monitoring
result of the joint monitoring device 25.
Thus, the spun yarn 10 can be cut by the cutter 100
of the yarn joining device 23 without specially providing
5 the cutter. Therefore, the spun yarn 10 can be cut with
a simple configuration in accordance with the monitoring
result of the joint monitoring device 25.
In the spinning machine of the present embodiment,
the joint monitoring device 25 is arranged downstream of
10 the yarn joining device 23. The spinning machine cuts the
spun yarn 10 by the cutter 100 in accordance with the
monitoring result of the joint of the spun yarn 10 by the
joint monitoring device 25.
Thus, the joint of the spun yarn 10 formed by the yarn
15 joining device 23 can be fed downstream by the winding of
the winding device 26, and non-defectiveness/defectiveness
of the joint can be immediately determined by the joint
monitoring device 25. Therefore, if the formed joint is
non-defective, the winding can be continued. If the joint
20 is defective, the joint defect can be detected at an initial
stage of acceleration of a winding speed of the winding
device 26, and the winding can be stopped in a short period
of time. As a result, the yarn joining can be efficiently
carried out when carrying out the yarn joining again.
25 The spinning machine of the present embodiment cuts
the spun yarn 10 by the cutter 100 after stopping the winding
of the winding device 26 when the defect is detected in the
joint of the spun yarn 10 by the joint monitoring device
25.
30 Thus, the cut yarn end is not wound into the package
50 rotating (through inertia) in the winding device 26.
31
Therefore, the yarn end can be reliably caught when carrying
out the yarn joining again.
In the spinning machine of the present embodiment,
the yarn joining device 23 includes the clamp section 98
5 adapted to hold the spun yarn 10. The cutting of the spun
yarn 10 carried out by the cutter 100 in accordance with
the monitoring result of the joint monitoring device 25 is
carried out while the spun yarn 10 is being held by the clamp
section 98.
10 Thus, the yarn end formed by the cutting of the spun
yarn 10 can be prevented from moving around due to rapid
release of the tension of the spun yarn 10 and/or twist
contraction of the spun yarn 10, and the like.
In the spinning machine of the present embodiment,
15 the area where the clamp section 98 of the yarn joining
device 23 holds the spun yarn 10 is on the downstream of
the cut area of the spun yarn 10 by the cutter 100.
Thus, the second yarn, which is the yarn end on the
downstream side (the package 50 side) of the yarn ends
20 formed by cutting the spun yarn 10 can be held by the clamp
section 98. Therefore, the yarn end of the second yarn
leading from the package 50 can be prevented from moving
around, and the yarn joining can be efficiently carried out
when carrying out the yarn joining again.
25 The spinning machine of the present embodiment
includes the second catching and guiding device 28 adapted
to catch the spun yarn 10 from the package 50. The clamp
section 98 is adapted to release the holding of the spun
yarn 10 after the second catching and guiding device 28
30 moves to a position where the second catching and guiding
device 28 can catch the spun yarn 10 held by the clamp section
32
98. '
Thus, the second yarn is held by the clamp section
98 such that the yarn end (the second yarn) from the package
50 does not move and the second yarn is delivered to the
5 second catching and guiding device 28, whereby the second
catching and guiding device 28 can very easily catch the
spun yarn 10. Therefore, the catching operation of the spun
yarn 10 can be smoothly carried out, and the efficiency of
the yarn joining can be further improved.
10 In the spinning machine of the present embodiment,
the yarn joining device 23 includes the guide plates 93,
94 and the yarn moving levers 95, 96. The guide plate 93
is provided with the first slit 101 to which the yarn end
of the first yarn from the yarn supplying section 5 is
15 introduced for the yarn joining and the second slit 102 to
which the yarn end of the second yarn from the package 50
is introduced for the yarn joining. The guide plate 94 is
provided with the first slit 201 to which the yarn end of
the first yarn is introduced for the yarn joining and the
20 second slit 202 to which the yarn end of the second yarn
is introduced for the yarn joining. The yarn moving levers
95 and 96 are adapted to perform a yarn moving operation
during the yarn joining to move the yarn end of the first
yarn to the inner side of the first slits 101 and 201 and
25 to move the yarn end of the second yarn to the inner side
of the second slits 102 and 202 . The downstream guide plate
94 includes the guiding surface 94c adapted to guide the
spun yarn 10 to the second slit 202 when the yarn moving
operation is carried out by the yarn moving levers 95 and
30 96 to cut the continuous spun yarn 10.
Thus, the continuous spun yarn 10 is reliably
33
introduced into the second slit 202, which is the slit for
cutting, by the guiding surface 94c of the guide plate 94.
As a result, the spun yarn 10 can be reliably cut by the
cutter 100 of the yarn joining device 23.
5 In the spinning machine of the present embodiment,
the upstream yarn moving lever 95 includes the bent portion
95b adapted to guide the spun yarn 10 to the second slit
102 when the yarn moving operation is carried out by the
yarn moving lever 95 (96) to cut the continuous spun yarn
10 10.
Thus, the continuous spun yarn 10 is reliably
introduced into the second slit 102, which is the slit for
cutting, by the bent portion 95b of the yarn moving lever
95. As a result, the spun yarn 10 can be reliably cut by
15 the cutter 100 of the yarn joining device 23.
The spinning machine of the present embodiment
includes the control section 80. The control section 80
is adapted to carry out the control such that the yarn
joining device 23 cuts the continuous spun yarn 10 in
20 accordance with the monitoring result of the joint
monitoring device 25.
Thus, the spun yarn 10 can be automatically cut by
the cutter 100 of the yarn joining device 23 in accordance
with the monitoring result of the joint monitoring device
25 25.
The preferred embodiment of the present invention has
been described above, but the structure described above may
be modified as below.
Instead of arranging the yarn joining device 23 and
30 the joint monitoring device 25 for each spinning unit 2,
an operation cart that can move among the spinning units
34
2 may be arranged and the operation cart may carry out the
yarn joining operation and the monitoring of the joint.
When the first catching and guiding device 27 catches
the first yarn and the second catching and guiding device
5 28 catches the second yarn, the catching may be assisted
by an appropriate assisting device. For example, the yarn
end may be blown towards the distal end of the first catching
and guiding device 27 and/or the distal end of the second
catching and guiding device 28 by injecting the compressed
10 air from an appropriate place. In this case, a catching
success rate of the first yarn and the second yarn can be
improved. A yarn guide and the like for regulating the
position of the spun yarn 10 may be further arranged. In
this case, the yarn end fed by the blown airflow can be stably
15 delivered to the first catching and guiding device 27 and/or
the second catching and guiding device 28.
How many times the package 50 has rotated from the
detection of the defect of the joint by the joint monitoring
device 25 until the stop of the package 50 may be detected,
20 and the rotation amount for reversely rotating the package
50 before the yarn joining operation may be controlled in
accordance with the detection result. In other words, the
amount in which the package 50 rotates until the rotation
stops differs according to the wound amount of the spun yarn
25 10 in the package 50 at the time point the joint defect is
detected and/or the rotation speed of the package 50 at the
time point the joint defect is detected. The control
section 80 thus may obtain the rotation amount until the
stop of the package 50 by an appropriate rotation detecting
30 section arranged in the winding device 26, and control the
reverse rotation amount of the package 50 in accordance with
35
the obtained rotation amount. The rotation detecting
section may be, for example, a rotation sensor configured
to generate a pulse signal each time the package 50 is
rotated by a predetermined angle. Thus, the package 50 can
5 be reversely rotated only by the minimum rotation amount
at which the defective joint can be pulled out and removed
according to the situation. As a result, the package 50
is prevented from being unnecessarily reversely rotated,
the waste of the spun yarn 10 can be reduced, and the
10 operation efficiency can be improved.
In the embodiment described above, the joint
monitoring device 25 that monitors the joint of the spun
yarn 10 is arranged separately from the yarn quality
monitoring device 40 that monitors the quality of the spun
15 yarn 10. However, both the joint of the spun yarn 10 and
the quality of the spun yarn 10 may be monitored by one yarn
monitoring device.
The structure for guiding the continuous spun yarn
10 to the second slits 102 and 202 is not limited to the
20 guiding surface 94c and the bent portion 95b described above.
For example, a large guiding surface 94c adapted to guide
the spun yarn 10 to the second slits 102 and 202 may be
arranged on the upstream guide plate 93. Furthermore, a
bent portion similar to the bent portion provided in the
25 upstream yarn moving lever 95 may be arranged in the
downstream yarn moving lever 96.
The continuous spun yarn 10 may be introduced, not
to the second slits 102 and 202, but to the first slits 101
and 201, and the spun yarn 10 may be cut by the cutter 99.
30 In this case, the second yarn cannot be held, but the first
yarn can be held by the clamp section 97.
36
In the embodiment described above, the spun yarn 10
is cut by the cutter 100 of the yarn joining device 23 when
the defective joint is detected, and after holding the
second yarn by the clamp section 98, the second catching
5 and guiding device 28 is once brought to rest at the position
indicated by the solid line in FIG. 9, and the clamping of
the clamp section 98 is controlled to be released under this
state. However, the second catching and guiding device 28
is not necessarily brought to a rest as long as the second
10 yarn can be reliably caught by the second catching and
guiding device 28.
In the embodiment described above, the winding drum
motor 116 adapted to drive the winding drum 53 of the winding
device 26 is arranged for each spinning unit 2. However,
15 alternatively, the winding drum 53 may be driven by a drive
shaft commonly arranged for the plurality of spinning units
2 . In this case, a package driving mechanism separate from
the winding drum 53 is preferably arranged to rotate the
package 50 at a lower acceleration than normal as described
20 above or to reversely rotate the package 50 immediately
after the completion of the yarn joining.
The spinning machine of the embodiment described
above has a layout in which the package 50 is arranged on
the upper side of the spinning unit 2 . However, the present
25 invention is not limited thereto, and may be applied to the
spinning machine (e.g., disclosure of Japanese Unexamined
Patent Publication No. 2010-77576) in which the package 50
is arranged on the lower side of the spinning unit 2.
Furthermore, the present invention can be applied to an
30 automatic winder adapted to wind the yarn unwound from a
yarn supplying bobbin to form a package. In this case, a
37
bobbin setting section adapted to set the yarn supplying
bobbin corresponds to the yarn supplying section.
According to a first aspect of the present invention,
a yarn winding machine includes a yarn supplying section,
5 a winding device, a yarn joining device, and a yarn
monitoring device. The yarn supplying section is adapted
to supply a yarn. The winding device is adapted to wind
the yarn into a package. The yarn joining device has a
cutter. The yarn monitoring device is adapted to monitor
10 the yarn. The cutter of the yarn joining device is adapted
to cut the continuous yarn in accordance with a monitoring
result of the yarn monitoring device.
Thus, the yarn can be cut by the cutter arranged in
the yarn joining device without specially providing the
15 cutter. Therefore, the yarn can be cut with a simple
configuration in accordance with the monitoring result of
the yarn monitoring device.
In the yarn winding machine described above, the yarn
monitoring device is arranged downstream than the yarn
20 joining device in a travelling direction of the yarn during
winding of the package. The cutter is adapted to cut the
yarn in accordance with the monitoring result of the yarn
monitoring device.
Thus, the joint of the yarn formed by the yarn joining
25 device can be fed towards the downstream by the winding of
the winding device, and non-defectiveness/def ectiveness of
the joint can be immediately determined by the yarn
monitoring device. Therefore, if the formed joint is
non-defective, the winding can be continued, and even if
30 the joint is defective, the joint defect can be detected
at an initial stage of acceleration of a winding speed of
38
the winding device and the winding can be stopped in a short
time. As a result, the yarn joining can be efficiently
carried out when carrying out the yarn joining again.
In the yarn winding machine described above, the
5 cutter is preferably adapted to cut the yarn after stopping
winding of the winding device when the yarn monitoring
device detects a defect in a joint of the yarn.
Thus, the cut yarn end is not wound into the package
in the winding device. Therefore, the yarn end can be
10 reliably caught when carrying out the yarn joining again.
In the yarn winding machine described above, the yarn
joining device includes a holding member adapted to hold
the yarn. The cutter is adapted to cut the yarn held by
the holding member in accordance with the monitoring result
15 of the yarn monitoring device.
Thus, the yarn end formed by the cutting of the yarn
can be prevented from moving around due to rapid release
of a tension of the yarn and/or twist contraction of the
yarn.
20 In the yarn winding machine described above, a
position where the holding member holds the yarn is
preferably arranged downstream than a position where the
cutter cuts the yarn in the travelling direction of the yarn
during the winding of the package.
25 Thus, the yarn end from the downstream (from the
package) of the yarn ends formed by cutting the yarn can
be held by the holding member. Therefore, the yarn end
leading from the package can be prevented from moving around,
and the yarn joining can be efficiently carried out when
30 carrying out the yarn joining again.
The yarn winding machine described above includes a
39
yarn catching section adapted to catch the yarn from the
package. The holding member is adapted to release the yarn
after the yarn catching section moves to a position where
the yarn catching section can catch the yarn held by the
5 holding member.
Thus, the yarn can be delivered to the yarn catching
member while the yarn is held by the holding member so as
not to move, and thus the yarn catching member can catch
the yarn very easily. Therefore, the catching operation
10 of the yarn can be smoothly carried out, and the efficiency
of the yarn joining operation can be further improved.
In the yarn winding machine described above, the yarn
joining device includes a guide member and a yarn moving
lever. A first slit and a second slit are formed on the
15 guide member. The first slit is a slit to which a first
yarn end that is a yarn end of the yarn from the yarn
supplying section is introduced for yarn joining. The
second slit is a slit to which a second yarn end that is
a yarn end of the yarn from the package is introduced for
20 the yarn joining. The yarn moving lever is adapted to
perform a yarn moving operation during the yarn joining to
move the first yarn end to an inner side of the first slit
and to move the second yarn end to an inner side of the second
slit. The guide member includes a first cut-guiding
25 section adapted to guide the continuous yarn to one of the
first slit and the second slit when performing the yarn
moving operation by the yarn moving lever for cutting the
yarn .
Thus, the continuous yarn is accurately guided by the
30 first cut-guiding section of the guide member into the slit
for cutting. As a result, the cutting of the yarn can be
40
reliably carried out.
In the yarn winding machine described above, the yarn
joining device includes a guide member and a yarn moving
lever. A first slit and a second slit are formed on the
5 guide member. The first slit is a slit to which a first
yarn end that is a yarn end of the yarn from the yarn
supplying section is introduced for yarn joining. The
second slit is a slit to which a second yarn end that is
a yarn end of the yarn from the package is introduced for
10 the yarn joining. The yarn moving lever is adapted to
perform a yarn moving operation during the yarn joining to
move the first yarn end to an inner side of the first slit
and to move the second yarn end to an inner side of the second
slit. The yarn moving lever includes a second cut-guiding
15 section adapted to guide the continuous yarn to one of the
first slit and. the second slit when performing the yarn
moving operation by the yarn moving lever for cutting the
yarn .
Thus, the continuous yarn is accurately guided by the
20 second cut-guiding section of the yarn moving lever into
the slit for cutting. As a result, the cutting of the yarn
can be reliably carried out.
The yarn winding machine includes a control section.
The control section is adapted to control the yarn joining
25 device to cut the continuous yarn in accordance with the
monitoring result of the yarn monitoring device.
Thus, the yarn can be automatically cut by the cutter
of the yarn joining device in accordance with the monitoring
result of the yarn monitoring device.
30 According to a second aspect of the present invention,
a yarn winding method relates to a method for winding a yarn
41
in a yarn winding machine including a yarn supplying section,
a winding device, a yarn joining device, and a yarn
monitoring device. The yarn supplying section is adapted
to supply a yarn. The winding device is adapted to wind
5 the yarn into a package. The yarn joining device can join
the yarn. The yarn monitoring device is adapted to monitor
the yarn. In the yarn winding method, the yarn joining
device cuts the yarn in accordance with the monitoring
result of the yarn monitoring device.
10 Thus, the yarn can be cut by the yarn joining device
without specially providing the configuration for cutting
the yarn. Therefore, according to the yarn winding method,
the yarn can be efficiently wound.

WE CLAIM:
1. A yarn winding machine comprising:
a yarn supplying section adapted to supply a yarn;
a winding device adapted to wind the yarn into a
5 package;
a yarn joining device having a cutter; and
a yarn monitoring device adapted to monitor the yarn,
wherein the cutter of the yarn joining device is
adapted to cut the continuous yarn in accordance with a
10 monitoring result of the yarn monitoring device.
2. The yarn winding machine according to claim 1,
wherein the yarn monitoring device is arranged downstream
of the yarn joining device in a travelling direction of the
15 yarn during winding of the package, and the cutter is
adapted to cut the yarn in accordance with the monitoring
result of the yarn monitoring device.
3 . The yarn winding machine according to claim 1 or
20 claim 2, wherein the cutter is adapted to cut the yarn after
stopping winding of the winding device when the yarn
monitoring device detects a defect in a joint of the yarn.
4. The yarn winding machine according to claim 3,
25 wherein the yarn joining device includes a holding member
adapted to hold the yarn, and the cutter is adapted to cut
the yarn held by the holding member in accordance with the
monitoring result of the yarn monitoring device.
30 5. The yarn winding machine according to claim 4,
wherein a position where the holding member holds the yarn
43
is arranged downstream of a position where the cutter cuts
the yarn in the travelling direction of the yarn during the
winding of the package.
5 6. The yarn winding machine according to claim 5,
further comprising a yarn catching section adapted to catch
the yarn from the package, and the holding member is adapted
to release the yarn after the yarn catching section moves
to a position where the yarn catching section can catch the
10 yarn held by the holding member.
7 . The yarn winding machine according to any one of
claim 3 through claim 6, wherein
the yarn joining device includes a guide member and
15 a yarn moving lever,
a first slit and a second slit are formed on the guide
member, the first slit being a slit to which a first yarn
end that is a yarn end of the yarn from the yarn supplying
section is introduced for yarn joining, and the second slit
20 being a slit to which a second yarn end that is a yarn end
of the yarn from the package is introduced for the yarn
j oining,
the yarn moving lever is adapted to perform a yarn
moving operation during the yarn joining to move the first
25 yarn end to an inner side of the first slit and to move the
second yarn end to an inner side of the second slit, and
the guide member includes a first cut-guiding section
adapted to guide the continuous yarn to one of the first
slit and the second slit when performing the yarn moving
30 operation by the yarn moving lever for cutting the yarn.
44
8 . The yarn winding machine according to any one of
claim 3 through claim 6, wherein
the yarn joining device includes a guide member and
a yarn moving lever,
5 a first slit and a second slit are formed on the guide
member, the first slit being a slit to which a first yarn
end that is a yarn end of the yarn from the yarn supplying
section is introduced for yarn joining, and the second slit
being a slit to which a second yarn end that is a yarn end
10 of the yarn from the package is introduced for the yarn
joining,
the yarn moving lever is adapted to perform a yarn
moving operation during the yarn joining to move the first
yarn end to an inner side of the first slit and to move the
15 second yarn end to an inner side of the second slit, and
the yarn moving lever includes a second cut-guiding
section adapted to guide the continuous yarn to one of the
first slit and the second slit when performing the yarn
moving operation by the yarn moving lever for cutting the
20 yarn.
9. The yarn winding machine according to claim 7,
wherein the yarn moving lever includes a second cut-guiding
section adapted to guide the continuous yarn to one of the
25 first slit and the second slit when performing the yarn
moving operation by the yarn moving lever for cutting the
yarn.
10. The yarn winding machine according to any one
30 of claim 1 through claim 9, further comprising a control
section adapted to control the yarn joining device to cut
45
the continuous yarn in accordance with the monitoring
result of the yarn monitoring device.
11. A yarn winding method in a yarn winding machine
5 including a yarn supplying section adapted to supply a yarn,
a winding device adapted to wind the yarn into a package,
a yarn joining device adapted to join the yarn, and a yarn
monitoring device adapted to monitor the yarn, the method
comprising:
10 cutting the continuous yarn by the yarn joining
device in accordance with a monitoring result of the yarn
monitoring device.