Technical Field
[0001] The present disclosure relates to a spinning machine.
Background Art
[0002] A spinning machine includes a yarn joining carrier performing a yarn joining operation
on yarn ends of disconnected yarn when yarn breakage or yarn cut occurs in a spinning
unit (for example, see Patent Literature 1). The yarn joining carrier includes a yarn
joining device performing yarn joining, a first catching-guiding device catching yarn
from a spinning device of the spinning unit and guiding the yarn to the yarn joining
device, and a second catching-guiding device catching the yarn from a winding device
of the spinning unit and guiding the yarn to the yarn joining device.
Citation List
Patent Literature
[0003] Patent Literature 1: Japanese Unexamined Patent Publication No.
2013-67483
Summary of Invention
Technical Problem
[0004] A conventional spinning machine stops movement of the first catching-guiding device
and the second catching-guiding device when the first catching-guiding device and/or
the second catching-guiding device comes into contact with another object. The spinning
machine notifies an operator that movement of the first catching-guiding device and
the second catching-guiding device have been stopped and an error has occurred. The
operator performs an operation to solve the error, and thereafter operates a button
to cause the first catching-guiding device and the second catching-guiding device
to be operable. In this manner, in the conventional spinning machine, the first catching-guiding
device and the second catching-guiding device return to their respective origin positions.
As described above, in the conventional spinning machine, when the first catching-guiding
device and/or the second catching-guiding device comes into contact with another object
and movement thereof is stopped, restart thereof requires an operation of the operator
and thus requires time. For this reason, such a conventional spinning machine has
a risk of reduction in operation efficiency.
[0005] An object of an aspect of the present disclosure is to provide a spinning machine
enabling improvement in operation efficiency.
Solution to Problem
[0006] A spinning machine according to an aspect of the present disclosure includes: a spinning
device configured to twist a fiber bundle to form yarn; a winding device configured
to wind the yarn formed with the spinning device to form a package; a yarn joining
device configured to join a first yarn from the spinning device and a second yarn
drawn from the package of the winding device; a first catching-guiding device configured
to catch the first yarn and to be movable between a first yarn catching position at
which the first yarn is caught and a first yarn guiding position at which the first
yarn is guided to the yarn joining device; a second catching-guiding device configured
to catch the second yarn and to be movable between a second yarn catching position
at which the second yarn is caught and a second yarn guiding position at which the
second yarn is guided to the yarn joining device; a first drive part configured to
move the first catching-guiding device to the first yarn catching position and the
first yarn guiding position; a second drive part configured to move the second catching-guiding
device to the second yarn catching position and the second yarn guiding position;
and a control part configured to control the first catching-guiding device to continue
movement of the first catching-guiding device to the first yarn catching position
when the first catching-guiding device comes into contact with another object during
movement to the first yarn guiding position.
[0007] With the spinning machine according to an aspect of the present disclosure, movement
of the first catching-guiding device to the first yarn catching position is continued
even when the first catching-guiding device comes into contact with another object.
Another object is highly likely to be an operator. For this reason, in the spinning
machine, the time for which the first catching-guiding device is contacting another
object is relatively short, and there is little possibility that the first catching-guiding
device is stopped for a long time. In the spinning machine, movement of the first
catching-guiding device to the first yarn catching position is continued so that,
after contact with another object is released, the first catching-guiding device can
move to the first yarn catching position. For this reason, in the spinning machine,
even when the first catching-guiding device comes into contact with another object,
the first catching-guiding device is enabled to move to the first yarn catching position
and the first yarn guiding position without intervention of an operator. Accordingly,
the spinning machine enables reduction in time for which the first catching-guiding
device is stopped. As a result, the spinning machine enables improvement in operation
efficiency.
[0008] In an embodiment, the control part may control the second catching-guiding device
to stop movement of the second catching-guiding device when the second catching-guiding
device comes into contact with another object during movement to the second yarn guiding
position. This structure enables prevention of application of an excessive load to
the second drive part.
[0009] In an embodiment, the control part may stop movement of the second catching-guiding
device and stop power supply to the second drive part. This structure stops power
supply to the second catching-guiding device, and enables the second catching-guiding
device to move without restraint.
[0010] In an embodiment, the spinning machine may further include an urging member configured
to urge the second catching-guiding device in a direction from the second yarn catching
position to the second yarn guiding position. This structure enables movement of the
second catching-guiding device supplied with no power toward the second yarn guiding
position with the urging member.
[0011] In an embodiment, the spinning machine may further include: a first detector configured
to detect a first origin position serving as an origin position of the first catching-guiding
device; and a second detector configured to detect a second origin position serving
as an origin position of the second catching-guiding device. This structure enables
movement of the first catching-guiding device with the first origin position serving
as a reference, and movement of the second catching-guiding device with the second
origin position serving as a reference. For this reason, this structure enables movement
of the first catching-guiding device and the second catching-guiding device with high
accuracy.
[0012] In an embodiment, the control part may start movement of the second catching-guiding
device to the second yarn guiding position earlier than movement of the first catching-guiding
device to the first yarn guiding position when one of the first catching-guiding device
and the second catching-guiding device has come into contact with another object.
With this structure, after the second catching-guiding device has started movement
to the second yarn guiding position, the first catching-guiding device starts movement
to the first yarn guiding position. For this reason, in the spinning machine, contact
between the first catching-guiding device and the second catching-guiding device in
a returning operation can be avoided.
[0013] In an embodiment, in a case where one of the first catching-guiding device and the
second catching-guiding device has come into contact with another object, the first
catching-guiding device may come into contact with the second catching-guiding device
to move the second catching-guiding device in a direction toward the second yarn guiding
position when the first catching-guiding device moves to the first yarn catching position.
This structure enables movement of the second catching-guiding device by movement
of the first catching-guiding device.
[0014] In an embodiment, the spinning machine may further include a third detector configured
to detect that the first catching-guiding device has reached the first yarn catching
position, and the control part may stop movement of the first catching-guiding device
when the first catching-guiding device is not detected with the third detector within
a predetermined time after the first catching-guiding device starts movement. When
the first catching-guiding device is not detected with the third detector within the
predetermined time, it is highly probable that contact between the first catching-guiding
device and another object is not released and movement of the first catching-guiding
device is stopped. For this reason, the spinning machine enables prevention of application
of an excessive load to the first drive part by stopping movement of the first catching-guiding
device.
[0015] In an embodiment, the control part may stop an operation of catching the first yarn
in the first catching-guiding device and/or an operation of catching the second yarn
in the second catching-guiding device when one of the first catching-guiding device
and the second catching-guiding device has come into contact with another object after
the first catching-guiding device has caught the first yarn and/or the second catching-guiding
device has caught the second yarn. Accordingly, the yarn caught with the first catching-guiding
device and/or the second catching-guiding device is released. Thus, a yarn joining
operation with the first yarn and/or the second yarn caught in an abnormal state can
be prevented from being executed. Moreover, catching of the first yarn with the first
catching-guiding device and catching of the second yarn with the second catching-guiding
device can be performed again.
[0016] In an embodiment, the control part may move the second catching-guiding device to
the second yarn catching position and move the first catching-guiding device to the
first yarn catching position after moving the second catching-guiding device to the
second origin position and moving the first catching-guiding device to the first origin
position when one of the first catching-guiding device and the second catching-guiding
device has come into contact with another object. This structure enables automatic
resumption of the yarn joining operation even when the first catching-guiding device
and/or the second catching-guiding device comes into contact with another object.
[0017] In an embodiment, the spinning machine may include: a plurality of spinning units,
each of which including the spinning device and the winding device; and at least one
carrier configured to travel in an arrangement direction of the spinning units and
including the yarn joining device, the first catching-guiding device, and the second
catching-guiding device. With this structure, the yarn joining device, the first catching-guiding
device, and the second catching-guiding device are shared between the spinning units.
However, because the operation efficiency is improved as described above, even when
contact with another object occurs during a yarn joining operation for one spinning
unit, this structure enables avoidance of an increase in standby time of the other
spinning units waiting for a yarn joining operation with the same carrier. This structure
enables improvement in operation efficiency also in the spinning machine including
a carrier.
Advantageous Effects of Invention
[0018] An aspect of the present disclosure enables improvement in operation efficiency.
Brief Description of Drawings
[0019]
FIG. 1 is a front view of a spinning machine according to an embodiment.
FIG. 2 is a side view of the spinning machine illustrated in FIG. 1.
FIG. 3 is a diagram illustrating a configuration of the spinning machine.
FIG. 4 is a diagram for explaining operations of the spinning machine.
FIG. 5 is a diagram for explaining operations of the spinning machine.
FIG. 6 is a diagram for explaining operations of the spinning machine.
FIG. 7 is a flowchart illustrating operations of the spinning machine.
FIG. 8 is a flowchart illustrating operations of the spinning machine.
FIG. 9 is a flowchart illustrating operations of the spinning machine.
Description of Embodiments
[0020] An embodiment of the present invention will be explained hereinafter with reference
to the drawings. In each of the drawings, the same or corresponding elements are denoted
with the same reference numerals, and an overlapping explanation thereof is omitted.
[0021] As illustrated in FIG. 1, a spinning machine 1 includes a plurality of spinning units
2, a yarn joining carrier (carrier) 3, a doffing carrier (not illustrated), a first
end frame 4, and a second end frame 5. The spinning units 2 are arranged in a line.
Each of the spinning units 2 forms yarn Y and winds the yarn Y into a package P. When
the package P becomes a full package in a spinning unit 2, the doffing carrier doffs
the full package P, and supplies a new bobbin B to the spinning unit 2.
[0022] The first end frame 4 accommodates a collecting device collecting fiber waste, yarn
waste, and the like generated in the spinning units 2, and other components. The second
end frame 5 accommodates an air supply part regulating the air pressure of compressed
air (air) supplied to the spinning machine 1 and supplying air to each part of the
spinning machine 1, a drive motor to supply motive power to each part of the spinning
units 2, and other components . The second end frame 5 is provided with a machine
control device (control part) 15, a display screen 16, and input keys 17. The machine
control device 15 performs concentrated management and control of each part of the
spinning machine 1. The display screen 16 is capable of displaying details of settings
and/or information relating to the state of the spinning units 2. The setting work
for the spinning units 2 is performed by an operator's proper operation using the
input keys 17.
[0023] Each of the spinning units 2 includes a draft device 6, an air spinning device 7,
a yarn monitoring device 8, a tension sensor 9, a yarn storage device 11, a waxing
device 12, and a winding device 13, in this order from the upstream side in the traveling
direction of the yarn Y. A unit controller 10 is provided for a predetermined number
of spinning units 2, and controls operations of the spinning units 2.
[0024] The draft device 6 drafts a sliver (fiber bundle) S. The air spinning device 7 twists,
with an air swirling flow, the fiber bundle F drafted with the draft device 6 to form
the yarn Y. More specifically (illustration thereof is omitted), the air spinning
device 7 includes a spinning chamber, a fiber guiding part, a swirling air flow generation
nozzle, and a hollow guide shaft member. The fiber guiding part guides the fiber bundle
F fed from the upstream draft device 6 into the spinning chamber. The swirling air
flow generation nozzle is disposed around a path along which the fiber bundle F travels
. Air is blown out of the swirling air flow generation nozzle to generate a swirling
air flow in the spinning chamber. With the swirling air flow, each fiber end of a
plurality of fibers forming the fiber bundle F is reversed and swirled. The hollow
guide shaft member guides the yarn Y from the inside of the spinning chamber to the
outside of the air spinning device 7.
[0025] The yarn storage device 11 removes slack of the yarn Y between the air spinning device
7 and the winding device 13. The waxing device 12 provides the yarn Y with wax between
the yarn storage device 11 and the winding device 13.
[0026] The winding device 13 winds the yarn Y on a bobbin B to form a package P. The winding
device 13 includes a cradle arm 21, a winding drum 22, and a traverse guide 23. The
cradle arm 21 rotatably supports the bobbin B. The cradle arm 21 is swingably supported
with a support shaft 24 (see FIG. 2 and FIG. 4) to bring the surface of the bobbin
B or the surface of the package P into contact with the surface of the winding drum
22 with proper pressure. The drive motor (not illustrated) provided in the second
end frame 5 drives the winding drums 22 of the spinning units 2 together. In this
manner, in each of the spinning units 2, the bobbin B or the package P is rotated
in a winding direction. The traverse guide 23 of each of the spinning units 2 is provided
on a shaft (not illustrated) shared between the spinning units 2. The drive motor
of the second end frame 5 reciprocally drives the shaft in the rotational axis direction
of the winding drum 22, so that the traverse guide 23 causes the yarn Y to traverse
with a predetermined width with respect to the rotating bobbin B or package P.
[0027] The yarn monitoring device 8 monitors information of the travelling yarn Y between
the air spinning device 7 and the yarn storage device 11, and detects the presence
or the absence of a yarn defect on the basis of the monitored information. When any
yarn defect is detected, the yarn monitoring device 8 transmits a yarn defect detection
signal to the unit controller 10. The tension sensor 9 measures the tension of the
traveling yarn Y between the air spinning device 7 and the yarn storage device 11,
and transmits a tension measurement signal to the unit controller 10. When the unit
controller 10 detects an abnormality on the basis of the detection result of the yarn
monitoring device 8 and/or the tension sensor 9, the yarn Y is cut in the spinning
unit 2.
[0028] In each of the spinning units 2, the air spinning device 7 is disposed above the
winding device 13. Accordingly, the yarn Y travels from the upper side to the lower
side in the height direction of the spinning units 2.
[0029] The yarn joining carrier 3 performs a yarn joining operation in a spinning unit 2
when the yarn Y is cut or broken for some reason in the spinning unit 2. One or a
plurality of yarn joining carriers 3 are provided in the spinning machine 1. The yarn
joining carrier 3 travels along the arrangement direction (the left-and-right direction
in FIG. 1) of the spinning units 2.
[0030] As illustrated in FIG. 2, the yarn joining carrier 3 includes a yarn joining device
26, a suction pipe (first catching-guiding device) 27, and a suction mouth (second
catching-guiding device) 28. As illustrated in FIG. 3, the yarn joining carrier 3
includes a first drive part 40 driving the suction pipe 27, and a second drive part
42 driving the suction mouth 28. The yarn joining carrier 3 includes a package plate
(not illustrated), and a reverse rotation device (not illustrated).
[0031] When the yarn Y is cut in a spinning unit 2 or broken for some reason, the package
P supported with the cradle arm 21 is separated from the winding drum 22 in the spinning
unit 2. The yarn joining carrier 3 contacts the package P and stops inertial rotation
of the package P. In addition, the package plate positions the package P with respect
to a second yarn catching position P22 of the suction mouth 28 described later. In
the state where the package P is separated from the winding drum 22, the reverse rotation
device reversely rotates the package P.
[0032] The yarn joining carrier 3 includes a traveling motor (not illustrated) driving a
wheel to cause the yarn joining carrier 3 to travel, a drive part (not illustrated)
driving the yarn joining device 26, a drive part (not illustrated) driving the package
plate, and a drive part (not illustrated) driving the reverse rotation device.
[0033] In the present embodiment, the suction pipe 27 and the first drive part 40 are modularized.
The suction mouth 28 and the second drive part 42 are modularized. The yarn joining
device 26 and the drive part are modularized. The package plate and the drive part
are modularized. The reverse rotation device and the drive part are modularized. Accordingly,
each member and the drive part dedicated for the member are allowed to be attached
or detached as a module being one unitary piece from the yarn joining carrier 3. This
structure enables easy assembly and maintenance of the yarn joining carrier 3.
[0034] The drive parts (motors) described above are arranged such that their axes are positioned
in the same direction. Specifically, the axes of the drive parts are arranged mutually
in parallel. This structure enables a simple layout in the yarn joining carrier 3.
As a result, fiber waste and the like hardly accumulate in the yarn joining carrier
3. The drive parts other than the traveling motor are contained in a predetermined
space in the housing of the yarn joining carrier 3. This structure enables a compact
structure of the whole yarn joining carrier 3, reduces the area that needs maintenance
by the operator, and achieves good maintenance property.
[0035] The yarn joining device 26 joins the guided first yarn Y1 (see FIG. 6) and the second
yarn Y2 (see FIG. 6) . The yarn joining device 26 is a splicer using compressed air,
a knotter mechanically yarn joining the yarn Y, or other devices.
[0036] As illustrated in FIG. 2, the suction pipe 27 is rotatably supported with a support
shaft 31. The suction pipe 27 catches the first yarn Y1 from the air spinning device
7 and guides the first yarn Y1 to the yarn joining device 26. The suction pipe 27
is provided to be movable between a standby position (first origin position) P11,
a first yarn catching position P12 (see FIG. 5) where the suction pipe 27 catches
the first yarn Y1 from the air spinning device 7, and a first yarn guiding position
P13 (see FIG. 6) where the suction pipe 27 guides the first yarn Y1 to the yarn joining
device 26.
[0037] The suction pipe 27 moves to the standby position P11, the first yarn guiding position
P13, and the first yarn guiding position P13, by operation of the first drive part
40. The first drive part 40 is, for example, a motor. The first drive part 40 is a
drive source dedicated for the suction pipe 27. For this reason, the suction pipe
27 is operable independently of the other devices. Operations of the first drive part
40 are controlled by the machine control device 15.
[0038] The suction pipe 27 is provided with a detection target member 27a. The detection
target member 27a is, for example, a magnet. The yarn joining carrier 3 includes a
standby position detector (first detector) 50 detecting the detection target member
27a, and a catching position detector (third detector) 52. The standby position detector
50 and the catching position detector 52 are, for example, magnetic sensors (hall
IC). The standby position detector 50 is disposed at a position to detect the detection
target member 27a when the suction pipe 27 is positioned at the standby position P11.
The catching position detector 52 is disposed at a position to detect the detection
target member 27a when the suction pipe 27 is positioned at the first yarn catching
position P12. Each of the standby position detector 50 and the catching position detector
52 outputs a detection signal to the machine control device 15 when it detects the
detection target member 27a.
[0039] The suction mouth 28 is rotatably supported by a support shaft 32. The suction mouth
28 catches the second yarn Y2 from the winding device 13 and guides the second yarn
Y2 to the yarn joining device 26. The suction mouth 28 is provided to be movable between
a standby position (second origin position) P21, a second yarn catching position P22
where the suction mouth 28 catches the second yarn Y2 from the winding device 13,
and a second yarn guiding position P23 (see FIG. 6) where the suction mouth 28 guides
the second yarn Y2 to the yarn joining device 26. The suction mouth 28 moves to the
standby position P21, the second yarn catching position P22, and the second yarn guiding
position P23 by operation of the second drive part 42. The second drive part 42 is,
for example, a motor (stepping motor) . The second drive part 42 is a drive source
dedicated for the suction mouth 28. For this reason, the suction mouth 28 is operable
independently of the other devices. Operations of the second drive part 42 are controlled
by the machine control device 15.
[0040] The suction mouth 28 is provided with a detection target member 28a. The detection
target member 28a is, for example, a magnet. The yarn joining carrier 3 includes a
standby position detector (second detector) 54 detecting the detection target member
28a. The standby position detector 54 is, for example, a magnetic sensor (hall IC).
The standby position detector 54 is disposed at a position to detect the detection
target member 28a when the suction mouth 28 is positioned at the standby position
P21. The standby position detector 54 outputs a detection signal to the machine control
device 15 when it detects the detection target member 28a.
[0041] In the present embodiment, the suction mouth 28 is provided with a spring (urging
member) 29. Specifically, one end of the spring 29 is coupled with the suction mouth
28, and the other end of the spring 29 is fixed on the housing of the yarn joining
carrier 3. The spring 29 is in an initial state (not stretched or contracted) when
the suction mouth 28 is positioned at the standby position P21, and stretches when
the suction mouth 28 is positioned at the second yarn catching position P22. The spring
29 assists the second drive part 42 when the suction mouth 28 is moved from the second
yarn catching position P22 toward the standby position P21 with the second drive part
42.
[0042] The following is an explanation of operations of the yarn joining carrier 3.
[0043] When yarn breakage or yarn cut occurs in one of the spinning units 2, the machine
control device 15 transmits, to the yarn joining carrier 3, a control signal to move
the yarn joining carrier 3 to the spinning unit 2. When the yarn joining carrier 3
receives the control signal, the yarn joining carrier 3 travels to the spinning unit
2 and is stopped.
[0044] Thereafter, the machine control device 15 operates the suction pipe 27 and the suction
mouth 28. Operations of the suction pipe 27 and the suction mouth 28 will be explained
hereinafter with reference to FIG. 7. As illustrated in FIG. 7, the machine control
device 15 transmits a control signal to the first drive part 40 and the second drive
part 42. In the present embodiment, the machine control device 15 transmits a control
signal to the second drive part 42 earlier than to the first drive part 40. In this
manner, in the yarn joining carrier 3, the suction mouth 28 starts movement earlier
than the suction pipe 27.
[0045] When the second drive part 42 receives the control signal, the second drive part
42 starts movement of the suction mouth 28 to the second yarn catching position P22
(Step S01) . When the first drive part 40 receives the control signal, the first drive
part 40 starts movement of the suction pipe 27 to the first yarn catching position
P12 (Step S01). After movement of the suction pipe 27 and the suction pipe 28 is started,
the machine control device 15 determines whether one of the suction pipe 27 and the
suction mouth 28 has come into contact with another object (Step S02).
[0046] The machine control device 15 determines contact of the suction pipe 27 and the suction
mouth 28 with another object on the basis of the movement time of the suction pipe
27 and the suction mouth 28. The machine control device 15 determines that the suction
pipe 27 has come into contact with another object when the suction pipe 27 does not
reach the first yarn catching position P12 within a first predetermined time after
the suction pipe 27 has startedmovement from the standby position P11. Specifically,
the machine control device 15 determines that the suction pipe 27 has come into contact
with another object when the detection target member 27a is not detected with the
catching position detector 52 within the first predetermined time after the detection
target member 27a has become undetected with the standby position detector 50.
[0047] The machine control device 15 determines that the suction mouth 28 has come into
contact with another object when the suction mouth 28 does not return to the standby
position P21 within a predetermined time after the suction mouth 28 has started movement
from the standby position P21. Specifically, the machine control device 15 determines
that the suction mouth 28 has come into contact with another object when the detection
target member 28a is not detected with the standby position detector 54 within the
predetermined time after the detection target member 28a has become undetected with
the standby position detector 54.
[0048] When the machine control device 15 does not determine that the suction pipe 27 or
the suction mouth 28 has come into contact with another object (when the machine control
device 15 determines that neither the suction pipe 27 nor the suction mouth 28 has
come into contact with another object) (NO at Step S02), the machine control device
15 proceeds to the processing of Step S03. When the machine control device 15 determines
that one of the suction pipe 27 and the suction mouth 28 has come into contact with
another object (YES at Step S02), the machine control device 15 proceeds to the processing
of Step S11.
[0049] At Step S03, the machine control device 15 moves the suction mouth 28 to the second
yarn catching position P22, and moves the suction pipe 27 to the first yarn catching
position P12. When the suction mouth 28 reaches the second yarn catching position
P22, the suction mouth 28 catches the second yarn Y2 from the package P (Step S04).
When the suction pipe 27 reaches the first yarn catching position P12, the suction
pipe 27 catches the first yarn Y1 from the air spinning device 7 (Step S04).
[0050] The machine control device 15 determines whether catching of the second yarn Y2 with
the suction mouth 28 has succeeded, on the basis of a detection result of a sensor
(not illustrated) provided in the suction mouth 28. When the machine control device
15 determines that the suction mouth 28 has caught the second yarn Y2, the machine
control device 15 starts movement of the suction mouth 28 to the second yarn guiding
position P23 (Step S05). The machine control device 15 determines whether catching
of the first yarn Y1 with the suction pipe 27 has succeeded, on the basis of a detection
result of a sensor (not illustrated) provided in the suction pipe 27. When the machine
control device 15 determines that the suction pipe 27 has caught the first yarn Y1,
the machine control device 15 starts movement of the suction pipe 27 to the first
yarn guiding position P13 (Step S05).
[0051] Thereafter, the machine control device 15 determines whether one of the suction pipe
27 and the suction mouth 28 has come into contact with another object (Step S06) during
movement of the suction mouth 28 from the second yarn catching position P22 to the
second yarn guiding position P23 and during movement of the suction pipe 27 from the
first yarn catching position P12 to the first yarn guiding position P13. When the
machine control device 15 does not determine that the suction pipe 27 or the suction
mouth 28 has come into contact with another object (when the machine control device
15 determines that neither the suction pipe 27 nor the suction mouth 28 has come into
contact with another object) (NO at Step S06), the machine control device 15 proceeds
to the processing of Step S07. When the machine control device 15 determines that
one of the suction pipe 27 and the suction mouth 28 has come into contact with another
object (YES at Step S05), the machine control device 15 proceeds to the processing
of Step S12 and Step S13.
[0052] At Step S12, the machine control device 15 stops the catching operation in the suction
mouth 28. Thereafter, the machine control device 15 proceeds to the processing "A"
illustrated in FIG. 8. At Step S13, the machine control device 15 stops the catching
operation in the suction pipe 27. Thereafter, the machine control device 15 proceeds
to the processing "B" illustrated in FIG. 9.
[0053] At Step S07, the suction mouth 28 reaches the second yarn guiding position P23, and
the suction pipe 27 reaches the first yarn guiding position P13. In this manner, a
state is accomplished in which the first yarn Y1 and the second yarn Y2 have been
guided to the yarn joining device 26.
[0054] The yarn joining device 26 performs yarn joining (Step S08) when the suction pipe
27 has guided the first yarn Y1 thereto and the suction mouth 28 has guided the second
yarn Y2 thereto. After the yarn joining device 26 performs yarn joining, the machine
control device 15 moves the suction pipe 27 to the standby position P11, and moves
the suction mouth 28 to the standby position P21 (Step S09). The machine control device
15 determines whether one of the suction pipe 27 and the suction mouth 28 has come
into contact with another object (Step S10) during movement of the suction pipe 27
from the first yarn guiding position P13 to the standby position P11 and during movement
of the suction mouth 28 from the second yarn guiding position P23 to the standby position
P21.
[0055] When the machine control device 15 does not determine that the suction pipe 27 or
the suction mouth 28 has come into contact with another object (when the machine control
device 15 determines that neither the suction pipe 27 nor the suction mouth 28 has
come into contact with another object) (NO at Step S10), the suction pipe 27 is stopped
at the standby position P11, and the suction mouth 28 is stopped at the standby position
P21. In this manner, a series of processes is ended. When the machine control device
15 determines that one of the suction pipe 27 and the suction mouth 28 has come into
contact with another object (YES at Step S10), the machine control device 15 notifies
an error (Step S14). For example, the machine control device 15 displays an error
code on a display part provided on the yarn joining carrier 3, and/or turns on or
blinks, in a specific color, a display lamp provided on the yarn joining carrier.
[0056] At Step S11, the machine control device 15 determines whether the suction mouth 28
has come into contact with another object. When the machine control device 15 determines
that the suction mouth 28 has come into contact with another object (YES at Step S11),
the machine control device 15 proceeds to the processing "A" illustrated in FIG. 8.
When the machine control device 15 does not determine that the suction mouth 28 has
come into contact with another object (when the machine control device 15 determines
that the suction mouth 28 has not come into contact with another object) (NO at Step
S11), the machine control device 15 proceeds to the processing "B" illustrated in
FIG. 9.
[0057] As illustrated in FIG. 8, when the machine control device 15 determines that the
suction mouth 28 has come into contact with another object, the machine control device
15 stops movement of the suction mouth 28 (Step S20).
[0058] Thereafter, the machine control device 15 controls the operation of the suction mouth
28 on the basis of the position of the suction pipe 27. Specifically, the machine
control device 15 determines whether the suction pipe 27 has reached the first yarn
catching position P12 (Step S21). When the machine control device 15 determines that
the suction pipe 27 has reached the first yarn catching position P12 (YES at Step
S21), the machine control device 15 controls the second drive part 42 to move the
suction mouth 28 to the standby position P21 (Step S22).
[0059] When the suction pipe 27 has not reached the first yarn catching position P12 (when
no positional information of the suction pipe 27 exists) (NO at Step S21), the machine
control device 15 stops power supply to the second drive part 42 (Step S23). This
operation enables the suction mouth 28 to swing without restraint and move in a direction
toward the standby position P21 with the urging force of the spring 29. In this state,
the suction mouth 28 is in contact with the suction pipe 27 moving toward the first
yarn catching position P12, and is moved toward the standby position P21 with movement
of the suction pipe 27.
[0060] Thereafter, the machine control device 15 determines whether the suction mouth 28
has returned to the standby position P21 (Step S24). Specifically, the machine control
device 15 determines whether the suction mouth 28 has returned to the standby position
P21, on the basis of a detection result of the detection target member 28a with the
standby position detector 54. When the detection target member 28a is detected with
the standby position detector 54, the machine control device 15 determines that the
suction mouth 28 has returned to the standby position P21 (YES at Step S24), and ends
the process. When the detection target member 28a is not detected with the standby
position detector 54, the machine control device 15 determines that the suction mouth
28 has not returned to the standby position P21 (NO at Step S24), and notifies occurrence
of an error (Step S25). With the steps described above, the operations of the suction
mouth 28 are ended.
[0061] As illustrated in FIG. 9, when the machine control device 15 determines that the
suction pipe 27 has come into contact with another object, the machine control device
15 continues movement of the suction pipe 27 to the first yarn catching position P12
(Step S30). Thereafter, the machine control device 15 determines whether the suction
pipe 27 has reached the first yarn catching position P12 (Step S31). When the machine
control device 15 determines that the suction pipe 27 has reached the first yarn catching
position P12 (YES at Step S31), the machine control device 15 proceeds to Step S32.
When the detection target member 27a is detected with the catching position detector
52, the machine control device 15 determines that the suction pipe 27 has reached
the first yarn catching position P12. When the machine control device 15 does not
determines that the suction pipe 27 has reached the first yarn catching position P12
(NO at Step S31), the machine control device 15 proceeds to Step S36.
[0062] Thereafter, the machine control device 15 determines whether the suction mouth 28
is positioned at the standby position P21 (Step S32). When the machine control device
15 determines that the suction mouth 28 is positioned at the standby position P21
(YES at Step S32), the machine control device 15 proceeds to Step S34. When the machine
control device 15 does not determines that the suction mouth 28 is positioned at the
standby position P21 (NO at Step S32), the machine control device 15 moves the suction
mouth 28 to the standby position P21 (Step S33).
[0063] At Step S34, the machine control device 15 moves the suction pipe 27 to the standby
position P11. Thereafter, the machine control device 15 determines whether the suction
pipe 27 has come into contact with another object (Step S35). When the machine control
device 15 determines that the suction pipe 27 has come into contact with another object
(YES at Step S35), the machine control device 15 notifies an error (Step S36). When
the machine control device 15 does not determine that the suction pipe 27 has come
into contact with another object (NO at Step S35), the machine control device 15 ends
the process. When one of the suction pipe 27 and the suction mouth 28 has come into
contact with another object, the machine control device 15 returns the suction mouth
28 to the standby position P21, returns the suction pipe 27 to the standby position
P11, and thereafter starts a yarn joining operation again.
[0064] As described above, with the spinning machine 1 according to the present embodiment,
even when the suction pipe 27 comes into contact with another object, movement to
the first yarn guiding position P13 is continued. Another object is highly likely
to be an operator. For this reason, in the spinning machine 1, the time for which
the suction pipe 27 comes into contact with another object is relatively short, and
there is little possibility that the suction pipe 27 is stopped for a long time. In
the spinning machine 1, movement of the suction pipe 27 to the first yarn catching
position P12 is continued so that, after contact with another object is released,
the suction pipe 27 can move to the first yarn catching position P12. For this reason,
in the spinning machine 1, even when the suction pipe 27 comes into contact with another
object, the suction pipe 27 is enabled to move to the first yarn catching position
P12 and the first yarn guiding position P13 without intervention of an operator. Accordingly,
the spinning machine 1 enables reduction in time for which the suction pipe 27 is
stopped. As a result, the spinning machine 1 enables improvement in operation efficiency.
[0065] In the spinning machine 1 according to the present embodiment, the machine control
device 15 may stop movement of the suction mouth 28 when the suction mouth 28 comes
into contact with another object while moving to the second yarn guiding position
P23. This structure enables prevention of application of an excessive load to the
second drive part 42.
[0066] In the spinning machine 1 according to the present embodiment, the machine control
device 15 may stop movement of the suction mouth 28 and stop power supply to the second
drive part 42. This structure stops power supply to the second drive part 42, and
enables the suction mouth 28 to move without restraint.
[0067] In the spinning machine 1 according to the present embodiment, the spinning machine
1 includes the spring 29 urging the suction mouth 28 in a direction from the second
yarn catching position P22 toward the second yarn guiding position P23. This structure
enables movement of the suction mouth 28 without power supply toward the second yarn
guiding position P23 (standby position P21) with the spring 29.
[0068] In the spinning machine 1 according to the present embodiment, the spinning machine
1 includes the standby position detector 50 detecting the first origin position (standby
position P11) serving as the origin position of the suction pipe 27, and the standby
position detector 54 detecting the second origin position (standby position P21) serving
as the origin position of the suction mouth 28. This structure enables movement of
the suction pipe 27 with the first origin position serving as a reference, and movement
of the suction mouth 28 with the second origin position serving as a reference. For
this reason, this structure enables movement of the suction pipe 27 and the suction
mouth 28 with high accuracy.
[0069] In the spinning machine 1 according to the present embodiment, the machine control
device 15 may start movement of the suction mouth 28 to the standby position P21 earlier
than movement of the suction pipe 27 to the first origin position when one of the
suction pipe 27 and the suction mouth 28 has come into contact with another object.
With this structure, after the suction mouth 28 starts movement to the standby position
P21, the suction pipe 27 starts movement to the standby position P11. For this reason,
the spinning machine 1 is able to avoid contact between the suction pipe 27 and the
suction mouth 28 in a returning operation.
[0070] In the spinning machine 1 according to the present embodiment, in the case where
one of the suction pipe 27 and the suction mouth 28 has come into contact with another
object, the suction pipe 27 comes into contact with the suction mouth 28 to move the
suction mouth 28 in a direction toward the standby position P21 when the suction pipe
27 moves to the standby position P11. This structure enables movement of the suction
mouth 28 by movement of the suction pipe 27.
[0071] The spinning machine 1 according to the present embodiment includes the catching
position detector 52 detecting that the suction pipe 27 has reached the first yarn
catching position P12. The machine control device 15 may stop movement of the suction
pipe 27 when the suction pipe 27 is not detected with the catching position detector
52 within a predetermined time after the suction pipe 27 has started movement. When
the suction pipe 27 is not detected with the catching position detector 52 within
the predetermined time, it is highly probable that contact between the suction pipe
27 and another object is not released and movement of the suction pipe 27 is stopped.
For this reason, the spinning machine 1 enables prevention of application of an excessive
load to the first drive part 40 by stopping movement of the suction pipe 27.
[0072] In the spinning machine 1 according to the present embodiment, the machine control
device 15 stops an operation of catching the first yarn Y1 in the suction pipe 27
and/or an operation of catching the second yarn Y2 in the suction mouth 28 when one
of the suction pipe 27 and the suction mouth 28 has come into contact with another
object after the suction pipe 27 has caught the first yarn Y1 and/or the suction mouth
28 has caught the second yarn Y2. Accordingly, the first yarn Y1 caught with the suction
pipe 27 and/or the second yarn Y2 caught with the suction mouth 28 is released. Thus,
a yarn joining operation with the first yarn Y1 and/or the second yarn Y2 caught in
an abnormal state can be prevented from being executed. Moreover, catching of the
first yarn Y1 from the air spinning device 7 with the suction pipe 27 and catching
of the second yarn Y2 from the winding device 13 (package P) with the suction mouth
28 can be performed again.
[0073] In the spinning machine 1 according to the present embodiment, the machine control
device 15 may move the suction mouth 28 to the second yarn catching position P22 and
move the suction pipe 27 to the first yarn catching position P12 after moving the
suction mouth 28 to the standby position P21 and moving the suction pipe 27 to the
standby position P11, when one of the suction pipe 27 and the suction mouth 28 has
come into contact with another object. This structure enables automatic resumption
of the yarn joining operation even when the suction pipe 27 and/or the suction mouth
28 comes into contact with another object.
[0074] An embodiment of the present invention has been explained above. The present invention
is, however, not always limited to the embodiment described above. Various changes
are possible within the range not departing from the gist of the present invention.
[0075] The embodiment described above illustrates, as an example, an aspect in which power
supply to the second drive part 42 is stopped when the suction pipe 27 has not reached
the first yarn catching position P12 (no positional information of the suction pipe
27 exists) and no positional information of the suction mouth 28 exists as illustrated
in FIG. 8. However, power supply to the second drive part 42 may be stopped in a state
other than the state described above.
[0076] The embodiment described above illustrates, as an example, an aspect in which movement
of the suction mouth 28 to the second yarn guiding position P23 is started earlier
than movement of the suction pipe 27 to the first yarn guiding position P13 when one
of the suction pipe 27 and the suction mouth 28 has come into contact with another
object. However, movement of the suction pipe 27 to the first yarn guiding position
P13 may be started earlier than movement of the suction mouth 28 to the second yarn
guiding position P23.
[0077] The embodiment described above illustrates, as an example, an aspect in which, when
one of the suction pipe 27 and the suction mouth 28 has come into contact with another
object, the suction mouth 28 is moved to the standby position P21 and the suction
pipe 27 is moved to the standby position P11, and thereafter the suction mouth 28
is moved to the second yarn catching position P22 and the suction pipe 27 is moved
to the first yarn catching position P12. However, the suction pipe 27 may be moved
to the standby position P11 and the suction mouth 28 may be moved to the standby position
P21, and thereafter the suction pipe 27 may be moved to the first yarn catching position
P12 and the suction mouth 28 may be moved to the second yarn catching position P22.
[0078] In the embodiment described above, the processing at Step S30 and Step S31 illustrated
in FIG. 9 may be repeated a plurality of times. Specifically, after movement of the
suction pipe 27 to the first yarn catching position P12 is continued, it is determined
whether the suction pipe 27 has reached the first yarn catching position P12. When
it is determined that the suction pipe 27 has not reached the first yarn catching
position P12, movement of the suction pipe 27 to the first yarn catching position
P12 is continued. After the processing is repeated a plurality of times, determination
at Step S31 is performed, and the process proceeds to Step S32 or Step S36. This structure
enables movement of the suction pipe 27 to the first yarn catching position P12 after
contact between the suction pipe 27 and another object is released even when the suction
pipe 27 comes into contact with another object.
[0079] The embodiment described above illustrates, as an example, an aspect in which an
error is immediately notified when it is determined that one of the suction pipe 27
and the suction mouth 28 has come into contact with another object (YES at Step S10)
at Step S10 illustrated in FIG. 7. However, an error may be notified when it is determined
that one of the suction pipe 27 and the suction mouth 28 still is in contact with
another object after movement of the suction pipe 27 and/or the suction mouth 28 is
performed for a predetermined time (a predetermined number of times) when it is determined
that one of the suction pipe 27 and the suction mouth 28 has come into contact with
another object.
[0080] The embodiment described above illustrates, as an example, an aspect in which an
error is immediately notified when it is determined that the suction pipe 27 has come
into contact with another object (YES at Step S35) at Step S35 illustrated in FIG.
9. However, an error may be notified when it is determined that the suction pipe 27
still is in contact with another object after movement of the suction pipe 27 is performed
for a predetermined time (a predetermined number of times) when it is determined that
the suction pipe 27 has come into contact with another object.
[0081] The embodiment described above illustrates, as an example, an aspect in which the
suction pipe 27 is moved to the standby position P11, the first yarn catching position
P12, and the first yarn guiding position P13, and the suction mouth 28 is moved to
the standby position P21, the second yarn catching position P22, and the second yarn
guiding position P23. However, the standby position P11 and the first yarn guiding
position P13 may be the same position. The standby position P21 and the second yarn
guiding position P23 may be the same position.
[0082] In addition to the embodiment described above, in the case where one of the suction
pipe 27 and the suction mouth 28 is positioned at the standby position (origin position),
when no positional information of the other exists, an origin returning operation
may be performed only on the other. For example, when the operator operates the suction
pipe 27 and/or the suction mouth 28 by hand, the position thereof may be dislocated
from the standby position. For this reason, the suction pipe 27 and/or the suction
mouth 28 may be returned to the standby position by the origin returning operation
described above .
[0083] The embodiment described above illustrates, as an example, an aspect in which, after
power supply to the second drive part 42 is stopped at Step S23 illustrated in FIG.
8, the suction mouth 28 is moved toward the standby position P21 by the urging force
of the spring 29. However, in the case where the catching position detector 52 detects
that the suction pipe 27 has reached the first yarn catching position P12 after power
supply to the second drive part 42 is stopped, the machine control device 15 may supply
power to the second drive part 42 again to control the second drive part 42 and move
the suction mouth 28 to the standby position P21. As another example, the yarn joining
carrier 3 may include the spring 29 having strength enabling movement of the suction
mouth 28 from the second yarn catching position P22 to the standby position P21 only
by urging force of the spring in the state in which no electric power is supplied
to the second drive part 42. In this case, after stand by position detector 54 detects
that the suction mouth 28 has reached the standby position P21, electric power may
be supplied to the second drive part 42 again.
[0084] The embodiment described above illustrates, as an example, an aspect in which the
position (standby position P11 or first yarn catching position P12) of the suction
pipe 27 is detected by detecting the detection target member 27a with the standby
position detector 50 or the catching position detector 52. However, the position of
the suction pipe 27 may be detected by other means (such as an encoder) . A similar
structure may be adopted for the suction mouth 28.
[0085] The embodiment described above illustrates, as an example, an aspect in which the
yarn joining carrier 3 is provided with the yarn joining device 26, the suction pipe
27, and the suction mouth 28. However, the yarn joining device 26, the suction pipe
27, and the suction mouth 28 may be provided on each of the spinning units 2.
[0086] The embodiment described above illustrates, as an example, an aspect in which the
machine control device 15 controls operations of the yarn joining carrier 3. However,
the yarn joining carrier 3 may be controlled with a controller provided in the yarn
joining carrier 3. Inthiscase, the unit controller 10 may transmit a signal indicating
yarn breakage or yarn cut to the controller of the yarn joining carrier 3, or the
signal may be transmitted from the unit controller 10 to the controller through the
machine control device 15. As another example, the unit controller 10 may control
operations of the yarn joining carrier 3.
[0087] The embodiment described above illustrates, as an example, an aspect in which the
spinning machine 1 includes the yarn joining carrier 3 and the doffing carrier. However,
the yarn joining carrier may have a doffing function.
[0088] In addition to the embodiment described above, the air spinning device 7 may further
include a needle provided to be retained with the fiber guiding part and project to
the inside of the spinning chamber so as to prevent twist of the fiber bundle from
being transmitted to the upstream side of the air spinning device. As another example,
the air spinning device may prevent twist of the fiber bundle from being transmitted
to the upstream side of the air spinning device with a downstream end portion of the
fiber guiding part instead of such a needle. As another example, instead of the structure
described above, the air spinning device may include a pair of air blowing nozzles
twisting the fiber bundle in mutually opposite directions. The spinning machine may
be an open-end spinning machine.
[0089] In the embodiment described above, the yarn storage device 11 has a function of drawing
the yarn Y from the air spinning device 7 in the spinning units 2. However, the yarn
Y may be drawn out of the air spinning device 7 with a delivery roller and a nip roller.
In this case, the suction pipe 27 catches the first yarn Y1 on the air spinning device
7 side drawn with the delivery roller and the nip roller. The yarn storage device
11 may be omitted in the structure including a delivery roller and a nip roller. As
another example, in this case, a slack tube absorbing slack of the yarn Y by a suction
air flow or a mechanical compensator may be provided instead of the yarn storage device
11.
[0090] In the embodiment described above, in the height direction of the spinning unit 2,
the devices are arranged such that the yarn Y fed on the upper side is wound on the
lower side. However, the devices may be arranged such that the yarn fed on the lower
side is wound on the upper side.
[0091] In the embodiment described above, the traverse guide 23 is driven by motive power
from the second end frame 5 (that is, in common for a plurality of the spinning units
2). However, the devices (such as the air spinning device and the winding device)
of each of the spinning units 2 may be driven independently.
[0092] In the traveling direction of the yarn Y, the tension sensor 9 may be disposed on
the upstream side of the yarn monitoring device 8. The unit controller 10 may be provided
for each of the spinning units 2. In the spinning units 2, the yarn monitoring device
8, the tension sensor 9, and the waxing device 12 may be omitted.
[0093] The embodiment described above illustrates, as an example, an aspect of winding the
cheese-shaped package P as illustrated in FIG. 1. However, a conical package may be
wound.
Reference Signs List
[0094] 1... SPINNING MACHINE, 13... WINDING DEVICE, 26... YARN JOINING DEVICE, 27... SUCTION
PIPE (FIRST CATCHING-GUIDING DEVICE), 28... SUCTION MOUTH (SECOND CATCHING-GUIDING
DEVICE), 40... FIRST DRIVE PART, 42... SECOND DRIVE PART, 50... STANDBY POSITION DETECTOR
(FIRST DETECTOR), 52... CATCHING POSITION DETECTOR (THIRD DETECTOR), 54... STANDBY
POSITION DETECTOR (SECOND DETECTOR), P11... STANDBY POSITION (FIRST ORIGIN POSITION),
P... PACKAGE, P12... FIRST YARN CATCHING POSITION, P13... FIRST YARN GUIDING POSITION,
P21... STANDBY POSITION (SECOND ORIGIN POSITION), P22... SECOND YARN CATCHING POSITION,
P23... SECOND YARN GUIDING POSITION, Y1... FIRST YARN, Y2... SECOND YARN.