YARN WINDING DEVICE AND TEXTILE MACHINE
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a yarn 5 winding
device and a textile machine.
2. Description of the Related Art
As a conventional yarn winding device, there is known
10 a yarn winding device including a yarn supplying section
adapted to supply a yarn, a winding section adapted to wind
the yarn of the yarn supplying section to form a package,
a winding process mechanism adapted to carry out a process
for the winding section to wind the yarn, and a drive motor
15 adapted to drive the winding process mechanism (see e.g.,
Japanese Unexamined Patent Publication No. 2009-208880).
In the yarn winding device described in Japanese
Unexamined Patent Publication No. 2009-208880, the
vibration of a cradle is monitored by a distortion gauge,
20 and the rotation speed of the package is controlled
according to the strength of the vibration.
In the above-described conventional technique, the
winding process mechanism may be shifted unintentionally
depending on the state of the yarn winding device. For
25 example, under a state where the vibration generated in the
winding process mechanism is large (at the start of winding
of yarn, at the time of abnormal paper tube, and the like),
the vibratory force of the vibration becomes larger than
the force for holding or the force for operating the winding
30 process mechanism with the drive motor, and positional
displacement may occur in the winding process mechanism.
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In the above-described conventional technique, in order to
respond to such a case, the current to be supplied to the
drive motor needs to be increased to strengthen the drive
force (drive torque) of the drive motor.
5
BRIEF SUMMARY OF THE INVENTION
It is therefore an object of the present invention
to provide a yarn winding device and a textile machine that
can suppress the current to be supplied to the drive motor
10 while preventing the winding process mechanism from being
shifted unintentionally.
A yarn winding device of the present invention
includes: a yarn supplying section adapted to supply a yarn;
a winding section adapted to wind the yarn of the yarn
15 supplying section to form a package; a winding process
mechanism adapted to carry out a process for the winding
section to wind the yarn; and a drive motor adapted to drive
the winding process mechanism. The yarn winding device
further includes a motor current adjusting section that
20 sets, to a first value, a current to be supplied to the drive
motor when a state of the yarn winding device is in a first
state and sets, to a second value greater than the first
value, a current to be supplied to the drive motor when the
state of the yarn winding device is in a second state
25 different from the first state.
In this yarn winding device, the second state is a
state in which a vibration of the winding process mechanism
is greater than the first state or a state in which the
vibration of the winding process mechanism is assumed to
30 be greater than the first state.
A textile machine of the present invention includes:
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a plurality of yarn winding devices including a yarn
supplying section adapted to supply a yarn and a winding
section adapted to wind the yarn of the yarn supplying
section to form a package; a travelling cart that travels
in a direction in which the plurality of yarn 5 winding
devices are arranged; a winding process mechanism that is
provided on the travelling cart and includes a yarn joining
device adapted to connect a yarn disconnected in a yarn
winding device that has made a yarn joining request out of
10 the plurality of yarn winding devices; a yarn processing
section that is provided on the yarn joining device and
adapted to act on the yarn; and a drive motor that is provided
on the travelling cart and adapted to drive the yarn
processing section. The textile machine further includes
15 a motor current adjusting section that sets, to a first
value, a current to be supplied to the drive motor when a
state of the travelling cart is in a first state and sets,
to a second value greater than the first value, a current
to be supplied to the drive motor when the state of the
20 travelling cart is in a second state different from the
first state. The second state is a state in which a vibration
of the travelling cart is greater than the first state or
a state in which the vibration of the travelling cart is
assumed to be greater than the first state.
25
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view illustrating a winding unit
of a first embodiment;
FIG. 2 is a perspective view illustrating a yarn
30 joining device in the winding unit of FIG. 1;
FIG. 3 is a schematic plan view for describing an
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operation of the yarn joining device of FIG. 2;
FIG. 4 is a schematic plan view illustrating a
continuation of FIG. 3 to describe the operation of the yarn
joining device of FIG. 2;
FIG. 5 is a schematic plan view illustrating 5 a
continuation of FIG. 4 to describe the operation of the yarn
joining device of FIG. 2;
FIG. 6 is a view illustrating a contacting pressure
adjustment mechanism in a winding unit of a second
10 embodiment; and
FIG. 7 is a front view illustrating a spinning machine
of a third embodiment.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
15 Preferred embodiments of the present invention will
be hereinafter described in detail with reference to the
drawings. The same reference numerals are denoted on the
same or corresponding portions throughout the drawings, and
redundant description will be omitted.
20 First Embodiment
As illustrated in FIG. 1, a winding unit (yarn winding
device) 1 of the present embodiment winds a yarn Y into a
package P from a yarn supplying bobbin B. The yarn
supplying bobbin B is formed by a spinning machine in a
25 pre-step, and for example, is fed from the spinning machine
while being set on a tray. A plurality of winding units
1 are arranged side by side to form an automatic winder,
which is a textile machine.
The winding unit 1 includes a bobbin supporting
30 section (yarn supplying section) 2, a yarn unwinding
assisting device 3, a pre-clearer 4, a tension applying
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device 5, a tension sensor 6, a lower yarn catching device
7, a yarn joining device 10, a cutter 9, a yarn monitoring
device 11, an upper yarn catching device 12, and a winding
device (winding section) 13 in this order from upstream
(lower side herein) along a travelling path of the yarn 5 Y.
Each of the components is attached to a unit main body
section 8.
The bobbin supporting section 2 is adapted to support
the yarn supplying bobbin B in an upright state, so that
10 the yarn Y can be supplied. The yarn unwinding assisting
device 3 is adapted to control a balloon of the yarn Y unwound
from the yarn supplying bobbin B by a tubular member
arranged above the yarn supplying bobbin B. The tension
applying device 5 is a gate type tension applying device
15 adapted to apply a predetermined tension on the travelling
yarn Y by holding the yarn Y in a zigzag manner with a pair
of gates including a fixed gate and a movable gate of comb
teeth form. The tension sensor 6 is adapted to measure the
tension of the yarn Y applied by the tension applying device
20 5.
The pre-clearer 4 is adapted to regulate, in advance,
passing of a yarn defect such as an entangled yarn greater
than a defined value by a pair of regulating members
arranged at a predetermined spacing with the travelling
25 path of the yarn Y therebetween. The yarn monitoring device
11 is adapted to detect a yarn defect such as slub during
the winding of the yarn Y. The cutter 9 is adapted to cut
the yarn Y when the yarn defect is detected by the yarn
monitoring device 11. The yarn joining device 10 is a
30 splicer device adapted to carry out the yarn joining
operation of the disconnected yarn Y. The yarn joining
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device 10 is adapted to join a yarn end of the yarn Y from
the package P and a yarn end of the yarn Y from the yarn
supplying bobbin B when the yarn Y is cut by the cutter 9
or when the yarn Y is broken.
The lower yarn catching device 7 is attached to th5 e
unit main body section 8 so as to be swingable with an axis
line  as a center. A suction port 7a is provided at a distal
end of the lower yarn catching device 7. The suction port
7a is swung between a position above the yarn joining device
10 10 and a position below the pre-clearer 4. When the yarn
Y is cut by the cutter 9 or when the yarn Y is broken, the
lower yarn catching device 7 swings the suction port 7a
toward the position below the pre-clearer 4 to suck the yarn
end of the yarn Y from the yarn supplying bobbin B with the
15 suction port 7a, and thereafter, swings the suction port
7a toward the position above the yarn joining device 10 to
pass the yarn Y from the yarn supplying bobbin B to the yarn
joining device 10.
The upper yarn catching device 12 is attached to the
20 unit main body section 8 so as to be swingable with an axis
line  as a center. A suction port 12a is provided at a
distal end of the upper yarn catching device 12. The
suction port 12a is swung between a position below the yarn
joining device 10 and the winding device 13. When the yarn
25 Y is cut by the cutter 9 or when the yarn Y is broken, the
upper yarn catching device 12 swings the suction port 12a
toward the winding device 13 to suck the yarn end of the
yarn Y from the package P with the suction port 12a, and
thereafter, swings the suction port 12a toward the position
30 below the yarn joining device 10 to pass the yarn Y from
the package P to the yarn joining device 10.
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The winding device 13 is adapted to wind the yarn Y
unwound from the yarn supplying bobbin B into the package
P to form a fully-wound package P. The winding device 13
includes a winding drum (auxiliary roller) 14 provided with
a traversing groove 14a. The winding drum 14 supports 5 the
package P in an auxiliary manner. The winding device 13
is provided with a cradle 15 adapted to rotatably support
the package P. The cradle 15 configures a winding process
mechanism adapted to carry out a process for the winding
10 device 13 to wind the yarn Y. The cradle 15 brings the
surface of the package P into contact with the surface of
the winding drum 14 at an appropriate contacting pressure.
The winding device 13 rotates the winding drum 14 with a
motor so that the package P rotates accompanying the
15 rotation of the winding drum 14, and winds the yarn Y into
the package P while traversing the yarn Y at a predetermined
width.
The unit main body section 8 is provided with a control
section 16, an input section 17, and a display section 18.
20 The control section 16 controls each component of the
winding unit 1. The input section 17 is, for example, an
operation button and the like, and is used when an operator
sets various values with respect to the control section 16,
and the like. The display section 18 displays an operation
25 status and the like of the winding unit 1. The control
section 16 receives and transmits various information
related to the winding operation with a high-order control
section provided in the automatic winder. The high-order
control section controls the control section 16 of each
30 winding unit 1 to control the entire automatic winder.
Next, a description will be made on the configuration
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of the yarn joining device 10. In the following description,
for the sake of convenience, the package P side is referred
to as an upper side (above), the yarn supplying bobbin B
side is referred to as a lower side (below), the travelling
path side of the yarn Y with respect to the yarn jo5 ining
device 10 is referred to as a front side (front) and the
opposite side is referred to as a rear side (rear). The
yarn Y from the package P is referred to as an upper yarn,
and the yarn Y from the yarn supplying bobbin B is referred
10 to as a lower yarn.
As illustrated in FIG. 2, the yarn joining device 10
configures the winding process mechanism adapted to carry
out a process for the winding device 13 to wind the yarn
Y. The yarn joining device 10 includes a yarn joining
15 section 50, a pair of yarn moving levers (yarn processing
sections) 81, and a pair of twist preventing levers (yarn
processing sections) 82. The yarn moving lever 81 is a
lever member adapted to adjust an introducing position of
the yarn end of the yarn Y in the yarn joining section 50.
20 The pair of yarn moving levers 81 is arranged vertically,
and is swung in conjunction with each other. The twist
preventing lever 82 is a lever member adapted to keep the
yarn Y during the yarn joining operation by the yarn joining
section 50 to a prescribed position. The pair of twist
25 preventing levers 82 is arranged vertically between the
pair of yarn moving levers 81, and is swung in conjunction
with each other. The yarn joining device 10 is attached
to the unit main body section 8 (see FIG. 1) by way of a
frame body 20 adapted to support each of the components.
30 A first guide plate 21 is arranged on the upper side
of the yarn joining section 50. A second guide plate 22
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is arranged on the lower side of the yarn joining section
50. The first guide plate 21 and the second guide plate
22 face each other vertically with the yarn joining section
50 therebetween. A guide groove, to which the yarn Y moved
by the yarn moving levers 81 is introduced, is formed 5 in
the first guide plate 21 and the second guide plate 22.
The yarn joining section 50 twists the yarn ends of
the yarn Y untwisted by an untwisting section (not
illustrated) to join the yarn ends. When twisting the yarn
10 ends in the yarn joining section 50, the yarn end of the
yarn Y is pulled out from the untwisting section by the yarn
moving levers 81, and the distal end portion of the yarn
end of the yarn Y is held down in proximity to the yarn
joining section 50 by the twist preventing levers 82.
15 A drive motor 23 is attached to the frame body 20 as
a drive source adapted to drive the pair of yarn moving
levers 81 and the pair of twist preventing levers 82. The
drive motor 23 is, for example, a stepping motor. The drive
motor 23 includes a drive shaft 24 having the vertical
20 direction as an axial direction. The drive motor 23 rotates
the drive shaft 24 to drive and control the yarn moving lever
81 through a link mechanism 100.
The link mechanism 100 is coupled to the drive motor
23 and the yarn moving lever 81 (the yarn moving lever 81
25 on the upper side herein). The link mechanism 100 includes
an arm 25 fixed to the drive shaft 24, and a coupling member
26 coupled to the arm 25 as a drive side link section 101.
The link mechanism 100 also includes a driven side link
section 102 provided in continuation to the yarn moving
30 lever 81 to be driven following the drive side link section
101. The coupling member 26 has a stepped plate shape that
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extends in a predetermined direction. The coupling member
26 has a back end portion thereof attached to the arm 25
by way of a shaft portion 26x having the vertical direction
as an axial direction. Thus, the coupling member 26 is
rotatably coupled via the shaft portion 26x with the 5 arm
25.
The driven side link section 102 has a plate shape,
and is arranged continuously so as to bend in a crank-form
when viewed from the upper side with respect to a basal end
10 portion of the yarn moving lever 81. The driven side link
section 102 is attached to a front end portion of the
coupling member 26 by way of a shaft portion 26y having the
vertical direction as an axial direction. Thus, the driven
side link section 102 is rotatably coupled via the shaft
15 portion 26y with the coupling member 26. The front end
portion of the driven side link section 102 (i.e., basal
end portion of the yarn moving lever 81) is rotatably
supported by a supporting shaft 27 fixed to the frame body
20.
20 The pair of twist preventing levers 82 is rotatably
supported by the supporting shaft 27 by way of a holding
portion 82x. The pair of twist preventing levers 82 is
urged toward the yarn joining section 50 (closing
direction) by a torsion coil spring (spring member) 28
25 serving as an elastic body, which is rotatably attached to
the supporting shaft 27. An engagement piece 82y that
engages with the yarn moving lever 81 is formed in the twist
preventing lever 82. The engagement piece 82y urges the
yarn moving lever 81 in the closing direction with the
30 urging force of the torsion coil spring 28. That is, the
yarn moving lever 81 is urged in the closing direction by
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way of the twist preventing lever 82 by means of the torsion
coil spring 28. Thus, the pair of twist preventing levers
82 and the pair of yarn moving levers 81 can be swung
synchronously in the closing direction and the opening
direction which is opposite to 5 the closing direction.
A stopper bolt 29 is provided at the basal end side
of the twist preventing lever 82. The stopper bolt 29 is
a stopper that stops the twist preventing lever 82 at a
predetermined position to control the propagation of the
10 twist of the yarn Y joined in the yarn joining section 50.
The stopper bolt 29 is screw-fitted into the holding portion
82x such that the distal end side thereof is exposed,
whereby the stopper bolt 29 integrally swings with the twist
preventing lever 82. When the yarn moving lever 81 and the
15 twist preventing lever 82 are swung by a predetermined
amount in the closing direction from a standby position,
the distal end portion of the stopper bolt 29 makes contact
with a part of the frame body 20. Thus, after such contact,
only the yarn moving lever 81 is swung in the closing
20 direction.
Next, a description will be made on the operation of
the yarn joining device 10 controlled by the control section
16 with reference to FIGS. 2 to 5. As illustrated in FIGS.
2 and 3, the pair of yarn moving levers 81 and the pair of
25 twist preventing levers 82 in the standby positions are
opened so as to be located on the outer side regarding the
first guide plate 21 and the second guide plate 22 when seen
from the front side.
In a state where the pair of yarn moving levers 81
30 and the pair of twist preventing levers 82 are in the standby
positions (hereinafter referred to as “standby position
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state”), at least a part of the link mechanism 100 is located
at a change point. Specifically, the drive side link
section 101 of the link mechanism 100 (i.e., crank
configured to include the arm 25 and the coupling member
26) is located at the change point in the standby po5 sition
state. In this case, the torsion coil spring 28 is deformed
so as to be able to urge its elastic force, and is in a state
where the torsion force serving as the torsion moment is
increased. A holding current is supplied to the drive motor
10 23, so that the pair of yarn moving levers 81 and the pair
of twist preventing levers 82 are held at the standby
positions (predetermined positions) by the drive force of
the drive motor 23 that acts against the urging force of
the torsion coil spring 28.
15 The “change point” is the position where the adjacent
link elements are present on a straight line, and has a state
in which the drive side can move to either side in the
rotating direction when drive is applied from the driven
side. The change point is also referred to as a dead point.
20 At the change point of the present embodiment, a line
segment connecting the drive shaft 24 and the shaft portion
26x and the line segment connecting the shaft portion 26x
and the shaft portion 26y are located on a straight line
when seen from the axial direction of the drive shaft 24.
25 The change point of the present embodiment has a state in
which the vector direction (arrow S2 in Fig. 3) of the urging
force (arrow S1 in Fig. 3) of the torsion coil spring 28
that acts with respect to the drive motor 23 intersects
substantially the center of the drive shaft 24. At the
30 change point, the force of pulling the shaft portion 26x
through the coupling member 26 is statically balanced by
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the urging force of the torsion coil spring 28.
The straight line includes a substantially straight
line in addition to a complete straight line, and for
example, includes a case in which the line segment
connecting the shaft portion 26x and the shaft portion 5 n 26y
is inclined at an angle of smaller than or equal to 30 with
respect to the line segment connecting the drive shaft 24
and the shaft portion 26x.
In the yarn joining device 10, when the yarn Y is cut
10 by the cutter 9 at the time of yarn defect detection or when
the yarn breakage of the yarn Y occurs by an excessive
tension, the yarn Y (upper yarn and lower yarn) is first
guided to the yarn joining device 10 by the upper yarn
catching device 12 and the lower yarn catching device 7 (see
15 FIG. 1). Thereafter, the operation current is supplied to
the drive motor 23, the drive shaft 24 is rotated by a
predetermined amount by the drive force acting against the
urging force of the torsion coil spring 28, and the pair
of yarn moving levers 81 is swung (moved) in the closing
20 direction via the link mechanism 100. Accompanying
therewith, the pair of twist preventing levers 82 are swung
in the closing direction with the pair of yarn moving levers
81 by the urging force of the torsion coil spring 28.
Thus, the yarn Y guided by the upper yarn catching
25 device 12 and the lower yarn catching device 7 is moved
toward the yarn joining section 50, introduced into the
guide grooves of the first guide plate 21 and the second
guide plate 22, and introduced into the yarn joining nozzle
of the yarn joining section 50. The yarn Y is cut by the
30 yarn cutting section while being held by the yarn holding
section. The untwisting air is injected into the
15 / 52
untwisting nozzle of the untwisting section, and the yarn
end of the yarn Y is taken into the untwisting section to
be untwisted.
Then, when the operation current is continuously
supplied to the drive motor 23 to further rotate the 5 drive
shaft 24 by a predetermined amount, the pair of yarn moving
levers 81 is further swung in the closing direction via the
link mechanism 100, and the pair of twist preventing levers
82 is further swung in the closing direction by the urging
10 force of the torsion coil spring 28, and thereafter, the
distal end portion of the stopper bolt 29 makes contact with
a part of the frame body 20 (see FIG. 4). Therefore, when
the drive shaft 24 of the drive motor 23 is further rotated
in the direction of the arrow R1 thereafter, only the pair
15 of yarn moving levers 81 is further swung in the closing
direction while the rotation of the pair of twist preventing
levers 82 is inhibited by the frame body 20 via the stopper
bolt 29 (see FIG. 5).
Thus, the yarn end of the untwisted yarn Y is pulled
20 out from the untwisting section, and the distal end portion
of the yarn end of the yarn Y is held down in proximity to
the yarn joining section 50 by the pair of twist preventing
levers 82 swung with the pair of yarn moving levers 81. The
yarn joining air is injected in the yarn joining section
25 50, and the yarn ends of the untwisted yarn Y are twisted.
Subsequently, the operation current is supplied to the
drive motor 23 to rotate the drive shaft 24 in the reverse
direction, and the pair of yarn moving levers 81 and the
pair of twist preventing levers 82 are returned to the
30 standby positions. Thus, the yarn Y joined by twisting the
yarn ends is returned to the travelling path of the yarn
16 / 52
Y on the front side of the yarn joining device 10.
As illustrated in FIG. 1, the winding unit 1 of the
present embodiment includes a vibration detecting sensor
(vibration detecting section) 41 adapted to detect the
vibration of the yarn joining device 10, and a motor 5 current
adjusting section 42 adapted to adjust the current to be
supplied to the drive motor 23 to control the drive force
(torque) of the drive motor 23.
The vibration detecting sensor 41 is provided in the
10 yarn joining device 10. The area where the vibration
detecting sensor 41 is provided and the number of the
vibration detecting sensors 41 to be provided are not
particularly limited, and merely needs to be a
predetermined area and a predetermined number with which
15 the vibration of the yarn joining device 10 can be detected.
For example, a contact-type vibration sensor can be used
for the vibration detecting sensor 41. The vibration
detecting sensor 41 includes a distortion gauge provided
in the yarn joining device 10, where at least one of the
20 displacement, the speed, or the acceleration of the yarn
joining device 10 is detected by the distortion gauge, and
the vibration generated in the yarn joining device 10 is
detected based on the detection value.
The vibration detecting sensor 41 outputs the
25 detection result (e.g., signal related to detected
vibration) to the motor current adjusting section 42. The
vibration detecting sensor 41 is not particularly limited,
and for example, various sensors such as a contactless-type
vibration sensor can be used. The vibration of the yarn
30 joining device 10 includes the magnitude (amplitude) and
the frequency of the vibration.
17 / 52
The motor current adjusting section 42 adjusts the
current to be supplied to the drive motor 23 based on the
detection result of the vibration detecting sensor 41.
When the magnitude of the vibration detected by the
vibration detecting sensor 41 is smaller than a 5 threshold
value, the motor current adjusting section 42 determines
the state as a normal state (first state) in which the
vibration of the yarn joining device 10 is small, and
supplies the operation current and/or holding current of
10 the first value to the drive motor 23. Thus, the yarn moving
lever 81 and the twist preventing lever 82 are moved and/or
held with a first drive force.
When the magnitude of the vibration detected by the
vibration detecting sensor 41 is greater than or equal to
15 a threshold value, the motor current adjusting section 42
determines the state as a state in which the vibration of
the yarn joining device 10 is large (second state), and
supplies the operation current and/or holding current of
the second value greater than the first value to the drive
20 motor 23. Thus, the yarn moving lever 81 and the twist
preventing lever 82 are moved and/or held with a second
drive force greater than the first drive force.
The first value and the second value to be supplied
to the drive motor 23 are switched based on the urging force
25 of the torsion coil spring 28 and the magnitude of the
vibration of the yarn joining device 10. For example, the
first value is 0.4A. The second value is 1.0A. The second
value may be a function value of the vibration that becomes
greater as the vibration is greater. The first value and
30 the second value are stored in advance in the motor current
adjusting section 42 as a map associated with the magnitude
18 / 52
of the vibration detected by the vibration detecting sensor
41.
Thus, in the winding unit 1, a large current is not
always supplied to the drive motor 23, and the current of
the first value is supplied to the drive motor 23 when 5 en the
state of the winding unit 1 is in the first state, which
is the normal state in which the vibration of the yarn
joining device 10 is small. When the state of the winding
unit 1 is in the second state in which the vibration of the
10 yarn joining device 10 becomes greater such as at the start
of winding of the yarn when the yarn joining device 10 is
shifted unintentionally (positional displacement of the
yarn moving lever 81 and the twist preventing lever 82
occurs), the large current of the second value is supplied
15 to the drive motor 23. The relevant shift thus can be
suppressed. Therefore, the current (power consumption) to
be supplied to the drive motor 23 can be reduced while
preventing the yarn joining device 10 from being shifted
unintentionally by the vibration. In other words, the loss
20 of synchronism such as when the vibration becomes large due
to the start of winding or an abnormal paper tube can be
avoided while reducing the current to be supplied to the
drive motor 23 as much as possible.
In the present embodiment, the current to be supplied
25 to the drive motor 23 when the state of the winding unit
1 is in the first state is set to the first value, and the
current to be supplied to the drive motor 23 when the state
of the winding unit 1 is in the second state different from
the first state is set to the second value greater than the
30 first value. Thus, for example, when the second state is
the state in which the yarn joining device 10 is shifted
19 / 52
unintentionally more than the first state, the current to
be supplied to the drive motor 23 can be reduced while
preventing the yarn joining device 10 from being shifted
unintentionally. A case where the winding unit 1 is in the
first state includes, for example, the time when the 5 winding
is stopped, and a case where the winding unit 1 is in the
second state includes, for example, the time of
acceleration, the time of brake, and the time of starting
the winding.
10 In the winding unit 1, the yarn joining device 10
includes the yarn moving lever 81 and the twist preventing
lever 82, and the torsion coil spring 28 adapted to urge
the yarn moving lever 81 and the twist preventing lever 82
in the predetermined direction. The drive motor 23 moves
15 or holds at the standby positions the pair of yarn moving
levers 81 and the pair of twist preventing levers 82 by the
drive force acting against the urging force of the torsion
coil spring 28. The motor current adjusting section 42
switches the first value and the second value to be supplied
20 to the drive motor 23 based on the urging force of the torsion
coil spring 28 and the magnitude of the vibration of the
yarn joining device 10. Thus, the drive of the yarn joining
device 10 with little rattling can be realized, and the
positional displacement of the yarn joining device 10 can
25 be suppressed even when the vibration becomes large.
The winding unit 1 includes the vibration detecting
sensor 41 adapted to detect the vibration of the yarn
joining device 10, and the motor current adjusting section
42 switches the first value and the second value to be
30 supplied to the drive motor 23 according to the detection
result of the vibration detecting sensor 41. The actual
20 / 52
vibration of the yarn joining device 10 is thereby detected,
and the current to be supplied to the drive motor 23 can
be adjusted. As a result, the drive control of the drive
motor 23 can be carried out with the minimum required
5 current.
In the winding unit 1, the stepping motor is used for
the drive motor 23. With the use of the stepping motor as
the drive motor 23, for example, an accurate positioning
control of the yarn joining device 10 can be realized with
10 a simple circuit configuration. Furthermore, while using
an inexpensive stepping motor, the above-described
operation effects can be achieved in which the current to
be supplied can be suppressed while preventing the yarn
joining device 10 from being shifted unintentionally.
15 In the present embodiment, the second value is
supplied to the drive motor 23 when the magnitude of the
vibration of the yarn joining device 10 detected by the
vibration detecting sensor 41 is greater than or equal to
the threshold value, but for example, as will be illustrated
20 below, the second value may be supplied to the drive motor
23 when the vibration is assumed to be large.
For example, a package state acquiring section
adapted to measure or calculate at least one of the wound
length (yarn length) of the yarn wound into the package P,
25 the diameter of the package P, or the weight of the package
P may be provided, and the motor current adjusting section
42 may switch the first value and the second value to be
supplied to the drive motor 23 according to a measurement
result or a calculation result of the package state
30 acquiring section. Specifically, when the relevant
parameter is smaller than a predetermined value, the motor
21 / 52
current adjusting section 42 assumes that the vibration of
the yarn joining device 10 is small, and supplies the first
value to the drive motor 23. When the parameter is greater
than or equal to the predetermined value, the vibration of
the yarn joining device 10 is assumed to be large, and 5 nd the
second value is supplied to the drive motor 23.
The package state acquiring section measures or
calculates the parameter (at least one of wound length,
diameter of package, or weight of package) associated with
10 the magnitude of the package P, for example, in the
following manner. In other words, the package state
acquiring section detects the winding speed (yarn speed)
of the yarn Y, and converts the detected winding speed to
measure the wound length of the wound yarn Y. The package
15 state acquiring section detects an angle of the cradle 15,
and calculates the diameter of the package P based on the
detected angle of the cradle 15. Alternatively, the
package state acquiring section detects the winding speed
of the yarn Y and the rotation speed of the package P, and
20 calculates the diameter of the package P based on the
detected winding speed of the yarn Y and the detected
rotation speed of the package P. The package state
acquiring section calculates the mass of the package P based
on the acquired wound length of the yarn Y and the count
25 or the yarn type of the yarn Y set with the input section
17.
According to such a configuration, it is found that
the yarn joining device 10 may be shifted unintentionally
when the parameter associated with the magnitude of the
30 package P becomes large, and thus control is performed with
the parameter associated with the magnitude of the package
22 / 52
P as the reference and the first value and the second value
are switched according to the relevant parameter. Thus,
the winding unit 1 can be realized using the normally
provided package state acquiring section, and a separate
special sensor such as the vibration detecting sensor 5 or 41
becomes unnecessary.
Furthermore, for example, a cradle angle detecting
section such as a cradle angle sensor adapted to measure
the angle of the cradle 15 may be provided, and the motor
10 current adjusting section 42 may switch the first value and
the second value to be supplied to the drive motor 23
according to the detection result of the cradle angle
detecting section. Specifically, when the angle of the
cradle 15 is smaller than a predetermined angle, the motor
15 current adjusting section 42 assumes that the vibration of
the yarn joining device 10 is small, and supplies the first
value to the drive motor 23. When the angle of the cradle
15 is greater than or equal to the predetermined angle, the
vibration of the yarn joining device 10 is assumed to be
20 large, and the second value is supplied to the drive motor
23.
According to such a configuration, it is found that
the yarn joining device 10 may be shifted unintentionally
when the angle of the cradle 15 becomes large, and thus
25 control is performed with the detected angle of the cradle
15 as the reference and the first value and the second value
are switched according to the angle of the cradle 15. Thus,
the winding unit 1 can be realized using the normally
provided cradle angle detecting section, and a separate
30 special sensor such as the vibration detecting sensor 41
becomes unnecessary.
23 / 52
Furthermore, for example, a winding speed measuring
section adapted to measure the winding speed of the yarn
wound into the package P may be provided, and the motor
current adjusting section 42 may switch the first value and
the second value to be supplied to the drive motor 5 or 23
according to the measurement result of the winding speed
measuring section. Specifically, when the winding speed
of the package P is smaller than a predetermined speed, the
motor current adjusting section 42 assumes that the
10 vibration of the yarn joining device 10 is small, and
supplies the first value to the drive motor 23. When the
winding speed of the package P is greater than or equal to
the predetermined speed, the vibration of the yarn joining
device 10 is assumed to be large, and the second value is
15 supplied to the drive motor 23. For example, a
photoelectric yarn length counter, which is a contactless
photoelectric yarn length counter, can be used for the
winding speed measuring section.
According to such a configuration, it is found that
20 the yarn joining device 10 may be shifted unintentionally
when the winding speed of the package P becomes large, and
thus control is performed with the measured winding speed
of the package P as the reference and the first value and
the second value are switched according to the winding speed
25 of the package P. Thus, the winding unit 1 can be realized
using the normally provided winding speed measuring section,
and a separate special sensor such as the vibration
detecting sensor 41 becomes unnecessary.
Furthermore, for example, a winding speed setting
30 section adapted to set the winding speed of the yarn Y wound
into the package P is provided, and the motor current
24 / 52
adjusting section 42 may switch the first value and the
second value to be supplied to the drive motor 23 according
to the set value of the winding speed setting section.
Specifically, when the set value of the winding speed is
smaller than a predetermined speed, the motor 5 current
adjusting section 42 assumes that the vibration of the yarn
joining device 10 is small, and supplies the first value
to the drive motor 23. When the set value of the winding
speed is greater than or equal to the predetermined speed,
10 the vibration of the yarn joining device 10 is assumed to
be large, and the second value is supplied to the drive motor
23. The input section 17 can be applied for the winding
speed setting section.
According to such a configuration, it is found that
15 the yarn joining device 10 may be shifted unintentionally
when the set value of the winding speed becomes large, and
thus control is performed with the set winding speed as the
reference and the first value and the second value are
switched according to the set value of the winding speed.
20 Thus, the winding unit 1 can be realized using the normally
provided winding speed setting section, and a separate
special sensor such as the vibration detecting sensor 41
becomes unnecessary.
In the winding unit 1, the yarn joining device 10 may
25 include the link mechanism for transmitting the drive force
of the drive motor 23 with respect to the yarn processing
section acting on the yarn Y. The link mechanism may
include a cam, a cam follower driven by the cam, and a spring
member adapted to urge the yarn processing section in a
30 predetermined direction, and the cam follower may be urged
toward the cam by the spring member. For example, the yarn
25 / 52
joining device 10 may rotate the cam accompanying the
rotation of the drive motor 23, and the yarn moving lever
81 and the twist preventing lever 82 urged in the opening
direction with the torsion coil spring 28 may be moved in
the closing direction via the cam follower. In this 5 case,
the power transmission with less rattling becomes possible
with the cam and the cam follower in the yarn joining device
10. Furthermore, the cam can be prevented from performing
an unexpected operation by the state of the winding unit
10 1.
In the present embodiment, the yarn holding section
adapted to hold the yarn Y moved by the yarn moving lever
and/or the yarn cutting section adapted to cut the yarn Y
held by the yarn holding section may be applied as the yarn
15 processing section acting on the yarn Y in the yarn joining
device 10. In this case, the drive motor that moves or holds
at a predetermined position the yarn holding section and/or
the yarn cutting section may be provided, and the current
(operation current and/or holding current) to be supplied
20 to the drive motor is adjusted by the motor current
adjusting section 42.
Second Embodiment
Next, a description will be made on the second
embodiment. In the description of the present embodiment,
25 the difference with the first embodiment will be described.
As illustrated in FIG. 6, a winding unit 1B of the
present embodiment differs from the winding unit 1 in that
a contacting pressure adjusting mechanism 30 adapted to
adjust the contacting pressure between the winding drum 14
30 and the package P is further provided. The contacting
pressure adjusting mechanism 30 configures a winding
26 / 52
process mechanism adapted to carry out a process for the
winding device 13 to wind the yarn Y. The contacting
pressure adjusting mechanism 30 is arranged parallel to the
axis of the package P, and swingably supports the cradle
15 with a rotation shaft 31. The contacting 5 pressure
adjusting mechanism 30 controls the torque about the
rotation shaft 31 to be applied to the cradle 15 to
increase/decrease the contacting pressure.
The contacting pressure adjusting mechanism 30
10 includes a connection plate 32 coupled to the rotation shaft
31 in a relatively immovable manner, and a gear 33 rotatably
journaled coaxially with respect to the rotation shaft 31.
Three connection pins 34 are provided on the connection
plate 32, and such three connection pins 34 are arranged
15 to form an equilateral triangle. Similarly, three
connection pins 35 are provided on the gear 33, and such
three connection pins 35 are arranged to form an equilateral
triangle.
A spring member 36 such as a coil spring is provided
20 between the alternating connection pins 34 and 35. The
spring member 36 couples the adjacent connection pin 34 and
the connection pin 35. The spring member 36 is deformed
(extended or contracted) when the gear 33 and the connection
plate 32 are relatively rotated in the opposite direction
25 with respect to each other. The gear 33 is driven by a drive
motor 38 via a drive pinion 37. The drive motor 38 is a
drive source for driving the gear 33. The drive motor 38
is, for example, a stepping motor.
When the gear 33 is swung, the spring member 36
30 continuous between the connection pins 34, 35
extends/contracts. The torque about the rotation shaft 31
27 / 52
is thereby generated in the connection plate 32, and
furthermore, the torque having the rotation shaft 31 as the
center is generated in the cradle 15. The action of the
torque increases/decreases the contacting pressure between
the package P and the winding drum 14. Therefore, 5 e, the
contacting pressure between the package P and the winding
drum 14 is adjusted by adjusting the current to be supplied
to the drive motor 38 and controlling the drive of the gear
33 by the drive motor 38.
10 The winding unit 1B of the present embodiment
includes a vibration detecting sensor (vibration detecting
section) 41B adapted to detect the vibration of the cradle
15, and a motor current adjusting section 42B adapted to
adjust the current to be supplied to the drive motor 38 to
15 control the drive force (torque) of the drive motor 38.
The vibration detecting sensor 41B is provided in the
cradle 15. The area where the vibration detecting sensor
41B is provided and the number of the vibration detecting
sensors 41B to be provided are not particularly limited,
20 and merely needs to be a predetermined area and a
predetermined number with which the vibration of the cradle
15 can be detected. For example, a contact-type vibration
sensor can be used for the vibration detecting sensor 41B,
similarly to the vibration detecting sensor 41. The
25 vibration detecting sensor 41B includes a distortion gauge
provided in the cradle 15, and at least one of the
displacement, the speed, and the acceleration of the cradle
15 is detected by the distortion gauge, and the vibration
of the cradle 15 is detected based on the detection value.
30 The vibration detecting sensor 41B outputs the detection
result to the motor current adjusting section 42B. The
28 / 52
vibration of the cradle 15 includes the magnitude
(amplitude) and the frequency of the vibration.
The motor current adjusting section 42B adjusts the
current to be supplied to the drive motor 38 based on the
detection result of the vibration detecting sensor 5 41B.
For example, when the magnitude of the vibration detected
by the vibration detecting sensor 41B is smaller than a
threshold value, the motor current adjusting section 42B
determines the state as a normal state (first state) in
10 which the vibration of the cradle 15 is small, and supplies
the contacting pressure current of the first value to the
drive motor 38. The contacting pressure between the
package P and the winding drum 14 is a first pressure.
When the magnitude of the vibration detected by the
15 vibration detecting sensor 41B is greater than or equal to
a threshold value, the motor current adjusting section 42B
determines the state as a state (second state) in which the
vibration of the cradle 15 is large, and supplies the
contacting pressure current of the second value greater
20 than the first value to the drive motor 38. The contacting
pressure between the package P and the winding drum 14 is
a second pressure greater than the first pressure.
For example, the first value is 0.4A. The second
value is 1.0A. The second value may be a function value
25 of the vibration that becomes greater as the vibration is
greater. The first value and the second value are stored
in advance in the motor current adjusting section 42B as
a map associated with the magnitude of the vibration
detected by the vibration detecting sensor 41B.
30 Thus, in the winding unit 1B as well, a large current
is not always supplied to the drive motor 38, and the current
29 / 52
of the first value is supplied to the drive motor 38 when
the state of the winding unit 1B is in the first state, which
is the normal state in which the vibration of the cradle
15 is small. When the state of the winding unit 1B in the
second state in which the vibration of the cradle 15 5 becomes
greater such as at the start of winding of the yarn when
the cradle 15 is likely to be shifted unintentionally
(positional displacement), the large current of second
value can be supplied to the drive motor 38 to suppress the
10 relevant shift. Therefore, the cradle 15 is prevented from
being shifted unintentionally by the vibration, and
furthermore, the current to be supplied to the drive motor
38 can be reduced while preventing the contacting pressure
between the package P and the winding drum 14 from shifting.
15 In the winding unit 1B, the contacting state between
the package P and the winding drum 14 can be maintained
constant regardless of the state of the winding unit 1B
(vibration state of the cradle 15). As a result, a
prescribed winding quality can be ensured.
20 In the present embodiment, the second value is
supplied to the drive motor 38 when the magnitude of the
vibration of the cradle 15 detected by the vibration
detecting sensor 41B is greater than or equal to the
threshold value, but for example, as will be illustrated
25 below, the second value may be supplied to the drive motor
38 when the vibration is assumed to be large, so that a
separate special sensor such as the vibration detecting
sensor 41B is unnecessary.
For example, a package state acquiring section
30 adapted to measure or calculate at least one of the wound
length of the yarn wound into the package P, the diameter
30 / 52
of the package P, or the weight of the package P is provided,
and the motor current adjusting section 42B may switch the
first value and the second value to be supplied to the drive
motor 38 according to the measurement result or the
calculation result of the package state acquiring se5 ction.
Specifically, when the parameter (at least one of wound
length, diameter of package, or weight of package)
associated with the magnitude of the package P is smaller
than a predetermined value, the vibration of the cradle 15
10 is assumed to be small, and the first value is supplied to
the drive motor 38. When the parameter is greater than or
equal to the predetermined value, the vibration of the
cradle 15 is assumed to be large, and the second value is
supplied to the drive motor 38.
15 Furthermore, for example, a cradle angle detecting
section adapted to measure the angle of the cradle 15 is
provided, and the motor current adjusting section 42B may
switch the first value and the second value to be supplied
to the drive motor 38 according to the detection result of
20 the cradle angle detecting section. Specifically, when
the angle of the cradle 15 is smaller than the predetermined
angle, the vibration of the cradle 15 is assumed to be small,
and the first value is supplied to the drive motor 38. When
the angle of the cradle 15 is greater than or equal to the
25 predetermined angle, the vibration of the cradle 15 is
assumed to be large, and the second value is supplied to
the drive motor 38.
Furthermore, for example, a winding speed measuring
section adapted to measure the winding speed of the yarn
30 Y wound into the package P is provided, and the motor current
adjusting section 42B may switch the first value and the
31 / 52
second value to be supplied to the drive motor 38 according
to the measurement result of the winding speed measuring
section. Specifically, when the winding speed of the
package P is smaller than a predetermined speed, the
vibration of the cradle 15 is assumed to be small, and 5 nd the
first value is supplied to the drive motor 38. When the
winding speed of the package P is greater than or equal to
the predetermined speed, the vibration of the cradle 15 is
assumed to be large, and the second value is supplied to
10 the drive motor 38.
Furthermore, for example, a winding speed setting
section adapted to set the winding speed of the yarn Y wound
into the package P is provided, and the motor current
adjusting section 42B may switch the first value and the
15 second value to be supplied to the drive motor 38 according
to the set value of the winding speed setting section.
Specifically, when the set value of the winding speed is
smaller than a predetermined speed, the vibration of the
cradle 15 is assumed to be small, and the first value is
20 supplied to the drive motor 38. When the set value of the
winding speed is greater than or equal to the predetermined
speed, the vibration of the cradle 15 is assumed to be large,
and the second value is supplied to the drive motor 38.
Third Embodiment
25 Next, a description will be made on the third
embodiment. As illustrated in FIG. 7, a spinning machine
(textile machine) 110 of the present embodiment includes
a plurality of spinning units (yarn winding devices) 1C,
a travelling cart 113, a first end frame 114, and a second
30 end frame 115.
The plurality of the spinning units 1C are arranged
32 / 52
in a row. Each of the spinning units 1C is adapted to
produce a yarn Y and to wind the yarn Y into a package P.
The travelling cart 113 is adapted to perform a yarn joining
operation in a spinning unit 1C after the yarn Y is cut,
or the yarn Y is broken for some reason in such a 5 spinning
unit 1C. The first end frame 114 accommodates a suction
source and the like for generating a suction flow at each
section of the spinning unit 1C. The second end frame 115
is provided with a unit control device C, a display screen
10 D, and an input key K. At the outside of the spinning
machine 110 (location away from the spinning machine 110.
For example, an appropriate location in a factory where the
spinning machine 110 is installed), an air supply source
adapted to generate a whirling airflow and the like at each
15 section of the spinning unit 1C is installed. The air
supply source supplies compressed air to each section of
the spinning machine 110 through a duct connected to the
air supply source. The unit control device C is adapted
to intensively manage and control each section of the
20 spinning machine 110. The display screen D is capable of
displaying information relating to set contents and/or a
status, or the like of the spinning units 1C. The air supply
source may be accommodated in the first end frame 114. When
installed away from the spinning machine 110, the air supply
25 source can be assumed as a structure different from the
spinning machine 110, but may be assumed as one of the
constituent elements of the spinning machine 110.
Each spinning unit 1C includes a draft device 116,
a pneumatic spinning device 117, a yarn monitoring device
30 118, a tension sensor 119, a yarn storage device 121, a
waxing device 122, and a winding device (winding section)
33 / 52
123 in this order from upstream in a travelling direction
of the yarn Y. A unit controller 130 is provided for every
predetermined number of the spinning units 1C and is adapted
to control operations of the spinning units 1C.
The draft device 116 is adapted to draft a fiber 5 bundle
S. The pneumatic spinning device 117 is adapted to produce
the yarn Y by twisting the fiber bundle S, which has been
drafted by the draft device 116, with a whirling airflow.
The pneumatic spinning device 117 functions as a yarn
10 supplying section capable of supplying the yarn Y. The yarn
monitoring device 118 is adapted to monitor information on
the travelling yarn Y between the pneumatic spinning device
117 and the yarn storage device 121, and to detect presence
or absence of a yarn defect based on the monitored
15 information. When detecting the yarn defect, the yarn
monitoring device 118 transmits a yarn defect detection
signal to the unit controller 130. The yarn monitoring
device 118 detects a thickness abnormality of the yarn Y
and/or foreign substances contained in the yarn Y, for
20 example, as the yarn defect. The yarn monitoring device
118 also detects a yarn breakage or the like.
The tension sensor 119 is adapted to measure tension
of the travelling yarn Y between the pneumatic spinning
device 117 and the yarn storage device 121, and to transmit
25 a tension measurement signal to the unit controller 130.
When the unit controller 130 determines presence of an
abnormality based on a detection result of the yarn
monitoring device 118 and/or the tension sensor 119, the
yarn Y is cut in the spinning unit 1C. Specifically, by
30 stopping air supply to the pneumatic spinning device 117
to interrupt the production of the yarn Y, the yarn Y is
34 / 52
cut. Alternatively, the yarn Y may be cut with a separately
provided cutter.
The waxing device 122 is adapted to apply wax to the
yarn Y between the yarn storage device 121 and the winding
device 123. The yarn storage device 121 is adapted 5 ted to
eliminate slack of the yarn Y between the pneumatic spinning
device 117 and the winding device 123. The yarn storage
device 121 has a function of stably pulling out the yarn
Y from the pneumatic spinning device 117, a function of
10 preventing the yarn Y from slackening by accumulating the
yarn Y fed from the pneumatic spinning device 117 at the
time of the yarn joining operation or the like by the
travelling cart 113, and a function of preventing variation
in the tension of the yarn Y at downstream of the yarn storage
15 device 121 from being propagated to the pneumatic spinning
device 117.
The winding device 123 is adapted to wind the yarn
Y to form a package P. The winding device 123 includes a
cradle 141 and a traverse guide 143. The cradle 141
20 rotatably supports the package P. The cradle 141 is
swingably supported, and causes a surface of the package
P to make contact with a surface of the winding drum (not
illustrated) at an appropriate pressure. The drive motor
provided in the second end frame 115 is adapted to drive
25 the winding drums each provided in the plurality of spinning
units 1C, whereby the package P is rotated in the winding
direction in each spinning unit 1C. The traverse guide 143
of each spinning unit 1C is provided on a shaft 125 shared
by the plurality of the spinning units 1C. By the drive
30 motor in the second end frame 115 driving the shaft 125 to
reciprocate, the traverse guide 143 traverses the yarn Y
35 / 52
in a predetermined width with respect to the rotating
package P.
The travelling cart 113 is an operation cart, and
after the yarn Y is cut, or the yarn Y is broken for some
reason in a spinning unit 1C, the travelling cart 5 113
travels to such a spinning unit 1C to perform the yarn
joining operation. A yarn joining device 126 is provided
on the travelling cart 113. The yarn joining device 126
configures the winding process mechanism. The yarn
10 joining device 126 is a yarn joining device that uses air,
a piecer that uses a seed yarn, or a knotter that
mechanically joins the yarn Y. In the travelling cart 113,
the yarn end of the yarn Y is guided by the suction pipe
and the suction mouth, and the yarn joining operation of
15 the yarns Y is carried out by the yarn joining device 126.
The yarn joining device 126 includes a yarn joining
section (not illustrated) adapted to twist and join the yarn
ends of the untwisted yarn Y. The yarn joining device 126
includes, as a yarn processing section that acts on the yarn
20 Y, a yarn moving lever adapted to adjust the introducing
position of the yarn end of the yarn Y in the yarn joining
section, and a twist preventing lever adapted to keep the
yarn Y during the yarn joining operation by the yarn joining
section to a prescribed position.
25 The travelling cart 113 of the present embodiment
includes a drive motor 131 adapted to drive the yarn
processing section provided in the yarn joining device 126,
a vibration detecting sensor (vibration detecting section)
41C adapted to detect the vibration of the travelling cart
30 113, and a motor current adjusting section 42C adapted to
adjust the current to be supplied to the drive motor 131
36 / 52
to control the drive force of the drive motor 131.
The drive motor 131 is a drive source for driving the
yarn processing section of the yarn joining device 126. The
drive motor 131 is, for example, a stepping motor. The yarn
processing section of the yarn joining device 126 5 (yarn
moving lever and twist preventing lever) is held at the
standby position so as not to move by supplying the holding
current to the drive motor 131.
The vibration detecting sensor 41C is provided in the
10 travelling cart 113. The area where the vibration
detecting sensor 41C is provided and the number of the
vibration detecting sensors 41C to be provided are not
particularly limited, and merely needs to be a
predetermined area and a predetermined number with which
15 the vibration of the travelling cart 113 can be detected.
For example, a contact-type vibration sensor can be used
for the vibration detecting sensor 41C, similarly to the
vibration detecting sensor 41. The vibration detecting
sensor 41C includes a distortion gauge provided in the
20 travelling cart 113, where at least one of the displacement,
the speed, or the acceleration of the travelling cart 113
is detected by the distortion gauge, and the vibration of
the travelling cart 113 is detected based on the detection
value. The vibration detecting sensor 41C outputs the
25 detection result to the motor current adjusting section 42C.
The vibration of the travelling cart 113 includes the
magnitude (amplitude) and the frequency of the vibration.
The motor current adjusting section 42C adjusts the
holding current to be supplied to the drive motor 131 based
30 on the detection result of the vibration detecting sensor
41C. When the magnitude of the vibration detected by the
37 / 52
vibration detecting sensor 41C is smaller than a threshold
value, the motor current adjusting section 42C determines
the state as a stop state (first state) in which the
vibration of the travelling cart 113 is small, and supplies
the current of the first value to the drive motor 131. 5 When
the magnitude of the vibration detected by the vibration
detecting sensor 41C is greater than or equal to a threshold
value, the motor current adjusting section 42C determines
the state as a travelling state (second state) in which the
10 vibration of the travelling cart 113 is large, and supplies
the current of the second value greater than the first value
to the drive motor 131.
For example, the first value is 0.4A. The second
value is 1.0A. The second value may be a function value
15 of the vibration that becomes greater as the vibration of
the travelling cart 113 is greater. The first value and
the second value are stored in advance in the motor current
adjusting section 42C as a map associated with the magnitude
of the vibration detected by the vibration detecting sensor
20 41C.
Thus, in the spinning machine 110, a large current
is not always supplied to the drive motor 131, and the
holding current of the first value is supplied to the drive
motor 131 when the state of the travelling cart 113 is in
25 the stop state in which the vibration of the travelling cart
113 is small. When the state of the travelling cart 113
is in the travelling state in which the vibration of the
travelling cart 113 is large, the large holding current of
the second value is supplied to the drive motor 131. Thus,
30 the yarn processing section of the yarn joining device 126
can be prevented from being shifted to an unintended state
38 / 52
(position displacement) by the vibration generated by the
travelling of the travelling cart 113. Therefore, the
current to be supplied to the drive motor 131 can be
suppressed while preventing the yarn joining device 126
from being shifted unintentionally 5 by the vibration.
In the present embodiment, the second value is
supplied to the drive motor 131 when the magnitude of the
vibration of the travelling cart 113 detected by the
vibration detecting sensor 41C is greater than or equal to
10 the threshold value, but as will be illustrated below, the
second value may be supplied to the drive motor 131 when
the vibration is assumed to be large, so that a separate
special sensor such as the vibration detecting sensor 41C
is unnecessary.
15 For example, a speed sensor (travelling state
acquiring section) adapted to measure the speed of the
travelling cart 113, and/or an acceleration sensor
(travelling state acquiring section) adapted to measure the
acceleration may be provided, and the motor current
20 adjusting section 42C may switch the first value and the
second value to be supplied to the drive motor 131 according
to the measurement result of the speed sensor and/or the
acceleration sensor. Specifically, when the measurement
result of the speed sensor and/or the acceleration sensor
25 is smaller than a predetermined value, the travelling cart
113 is assumed to be in the stop state in which the vibration
is small, and the first value is supplied to the drive motor
131 by the motor current adjusting section 42C. When the
measurement result of the speed sensor and/or the
30 acceleration sensor is greater than or equal to the
predetermined value, the travelling cart 113 is assumed to
39 / 52
be in the travelling state in which the vibration is large,
and the second value is supplied to the drive motor 131 by
the motor current adjusting section 42C. For example, a
calculating section (travelling state acquiring section)
adapted to calculate the speed and/or the acceleration 5 of
the travelling cart 113 based on a control command value
sent to a travelling motor of the travelling cart 113 may
be provided in place of the speed sensor and/or the
acceleration sensor. In this case, the motor current
10 adjusting section 42C switches the first value and the
second value according to the calculated value of the
calculating section. In other words, a travelling state
acquiring section adapted to acquire the value of at least
one of the speed or the acceleration of the travelling cart
15 113 is provided, and the motor current adjusting section
42C may switch the first value and the second value to be
supplied to the drive motor 131 according to the value
acquired by the travelling state acquiring section.
The embodiments of the present invention has been
20 described, but the present invention is not limited to the
above-described embodiments. In the above-described
embodiments, the torsion coil spring 28 is used as the
spring member, but various elastic members may be used as
long as at least a part of the movable member can be urged.
25 The motor current adjusting sections 42, 42B, 42C of
the above-described embodiments adjust the current to be
supplied to the drive motors 23, 38, 131 to control the drive
force (torque), but in place of or in addition thereto, the
motor current adjusting sections 42, 42B, 42C may adjust
30 the voltage and/or power to be supplied to the drive motors
23, 38, 131 to control the drive force.
40 / 52
A yarn winding device of the present invention
includes: a yarn supplying section adapted to supply a yarn;
a winding section adapted to wind the yarn of the yarn
supplying section to form a package; a winding process
mechanism adapted to carry out a process for 5 the winding
section to wind the yarn; and a drive motor adapted to drive
the winding process mechanism. The yarn winding device
further includes a motor current adjusting section that
sets, to a first value, a current to be supplied to the drive
10 motor when a state of the yarn winding device is in a first
state and sets, to a second value greater than the first
value, a current to be supplied to the drive motor when the
state of the yarn winding device is in a second state
different from the first state.
15 In this yarn winding device, a current to be supplied
to the drive motor when the state of the yarn winding device
is in the first state is set to the first value and a current
to be supplied to the drive motor when the state of the yarn
winding device is in the second state is set to the second
20 value greater than the first value. Thus, a large current
is not always supplied to the drive motor, and for example,
in the normal time, the current of the first value is
supplied to the drive motor, and at the start of winding
of the yarn when the winding process mechanism is likely
25 to be shifted unintentionally, a large current of the second
value is supplied to the drive motor to suppress the shift.
Therefore, the current to be supplied to the drive motor
can be suppressed while preventing the winding process
mechanism from being shifted unintentionally.
30 In this yarn winding device, the second state is a
state in which a vibration of the winding process mechanism
41 / 52
is greater than the first state or a state in which the
vibration of the winding process mechanism is assumed to
be greater than the first state. Thus, the current to be
supplied to the drive motor can be suppressed while
preventing the winding process mechanism from being sh5 ifted
unintentionally by the vibration.
In the yarn winding device of the present invention,
the winding process mechanism may include a yarn processing
section adapted to act on the yarn, and a spring member
10 adapted to urge the yarn processing section in a
predetermined direction, the drive motor may move the yarn
processing section or hold the yarn processing section at
a predetermined position by a drive force that acts against
an urging force of the spring member, and the motor current
15 adjusting section may switch the first value and the second
value to be supplied to the drive motor based on the urging
force of the spring member and a magnitude of the vibration
of the winding process mechanism. According to such a
configuration, the drive of the winding process mechanism
20 with very little rattling can be realized, and the
positional displacement of the winding process mechanism
can be reduced even when the vibration becomes large.
The yarn winding device of the present invention may
include the vibration detecting section adapted to detect
25 the vibration of the winding process mechanism, and the
motor current adjusting section may switch the first value
and the second value to be supplied to the drive motor
according to the detection result of the vibration
detecting section. According to such a configuration, the
30 actual vibration is detected so that the current to be
supplied to the drive motor can be adjusted.
42 / 52
The yarn winding device of the present invention may
include a package state acquiring section adapted to
measure or calculate at least one of a wound length of the
yarn wound into the package, a diameter of the package, or
a weight of the package, wherein the motor current adju5 sting
section may switch the first value and the second value to
be supplied to the drive motor according to a measurement
result or a calculation result of the package state
acquiring section. In this case, it is found that the
10 winding process mechanism may be shifted unintentionally
when at least one of the parameters of the wound length,
the diameter of the package, or the weight of the package
becomes large, and hence the first value and the second
value are switched according to the relevant parameter.
15 Thus, the present invention can be realized using the
package state acquiring section provided in the normal yarn
winding device, and a separate special sensor becomes
unnecessary.
The yarn winding device of the present invention may
20 include a winding speed measuring section adapted to
measure a winding speed of the yarn wound into the package,
wherein the motor current adjusting section may switch the
first value and the second value to be supplied to the drive
motor according to a measurement result of the winding speed
25 measuring section. In this case, it is found that the
winding process mechanism may be shifted unintentionally
when the winding speed becomes large, and hence the first
value and the second value are switched according to the
winding speed. Thus, the present invention can be realized
30 using the winding speed measuring section provided in the
normal yarn winding device, and a separate special sensor
43 / 52
becomes unnecessary.
The yarn winding device of the present invention may
include a winding speed setting section adapted to set a
winding speed of the yarn wound into the package, wherein
the motor current adjusting section may switch the 5 first
value and the second value to be supplied to the drive motor
according to a set value of the winding speed setting
section. In this case, it is found that the winding process
mechanism may be shifted unintentionally when the set value
10 of the winding speed becomes large, and hence the first
value and the second value are switched according to the
set value of the winding speed. Thus, the present invention
can be realized using the winding speed setting section
provided in the normal yarn winding device, and a separate
15 special sensor becomes unnecessary.
In the yarn winding device of the present invention,
the winding process mechanism may be a yarn joining device
adapted to carry out a yarn joining operation of a
disconnected yarn, the yarn joining device may include a
20 link mechanism adapted to transmit a drive force of the
drive motor to a yarn processing section that acts on the
yarn, the link mechanism may include a cam, a cam follower
driven by the cam, and a spring member adapted to urge the
yarn processing section in a predetermined direction, and
25 the cam follower may be urged toward the cam by the spring
member. In this case, the power transmission with less
rattling becomes possible with the cam and the cam follower
in the yarn joining device. Furthermore, the cam can be
prevented from performing an unexpected operation by the
30 state of the yarn winding device.
In the yarn winding device of the present invention,
44 / 52
the winding section may include an auxiliary roller adapted
to support the package in an auxiliary manner, the winding
process mechanism may include a cradle adapted to rotatably
support the package, and a contacting pressure adjusting
mechanism adapted to adjust a contacting 5 cting pressure between
the auxiliary roller and the package by the drive motor.
In this case, the contacting state between the package and
the auxiliary roller can be maintained constant regardless
of the state of the yarn winding device. As a result, a
10 prescribed winding quality can be ensured.
In the yarn winding device of the present invention,
the drive motor may be a stepping motor. With the use of
the stepping motor for the drive motor, for example, an
accurate positioning control of the winding process
15 mechanism can be realized with a simple circuit
configuration.
A textile machine of the present invention includes:
a plurality of yarn winding devices including a yarn
supplying section adapted to supply a yarn and a winding
20 section adapted to wind the yarn of the yarn supplying
section to form a package; a travelling cart that travels
in a direction in which the plurality of yarn winding
devices are arranged; a winding process mechanism that is
provided on the travelling cart and includes a yarn joining
25 device adapted to connect a yarn disconnected in a yarn
winding device that has made a yarn joining request out of
the plurality of yarn winding devices; a yarn processing
section that is provided on the yarn joining device and
adapted to act on the yarn; and a drive motor that is provided
30 on the travelling cart and adapted to drive the yarn
processing section. The textile machine further includes
45 / 52
a motor current adjusting section that sets, to a first
value, a current to be supplied to the drive motor when a
state of the travelling cart is in a first state and sets,
to a second value greater than the first value, a current
to be supplied to the drive motor when the state of 5 the
travelling cart is in a second state different from the
first state.
In this textile machine, a current to be supplied to
the drive motor when the state of the travelling cart is
10 in the first state is set to the first value, and a current
to be supplied to the drive motor when the state of the
travelling cart is in the second state is set to the second
value greater than the first value. Thus, a large current
is not always supplied to the drive motor, and for example,
15 in the normal time, the current of the first value is
supplied to the drive motor. At the time of travelling of
the travelling cart when the yarn processing section
provided on the yarn joining device of the winding process
mechanism is likely to be shifted unintentionally, a large
20 current of the second value can be supplied to the drive
motor to suppress the shift. Therefore, the current to be
supplied to the drive motor can be reduced while preventing
the winding process mechanism from being shifted
unintentionally. The second state is a state in which a
25 vibration of the travelling cart is greater than the first
state or a state in which the vibration of the travelling
cart is assumed to be greater than the first state. The
motor current adjusting section switches the first value
and the second value according to the detection result of
30 the vibration detecting section adapted to detect the
vibration of the travelling cart. Alternatively, the
46 / 52
motor current adjusting section switches the first value
and the second value according to the value of at least one
of speed and acceleration of the travelling cart.
According to the present invention, there are
provided a yarn winding device and a textile machine 5 e that
can suppress the current to be supplied to the drive motor
while preventing the winding process mechanism from being
shifted unintentionally.
47 / 52

We claim:
1. A yarn winding device comprising:
a yarn supplying section adapted to supply a yarn;
a winding section adapted to wind the 5 yarn supplied
from the yarn supplying section to form a package;
a winding process mechanism adapted to carry out a
process for the winding section to wind the yarn; and
a drive motor adapted to drive the winding process
10 mechanism,
the yarn winding device characterized by
a motor current adjusting section that sets, to a
first value, a current to be supplied to the drive motor
when a state of the yarn winding device is in a first state
15 and sets, to a second value greater than the first value,
a current to be supplied to the drive motor when the state
of the yarn winding device is in a second state different
from the first state,
wherein the second state is a state in which a
20 vibration of the winding process mechanism is greater than
the first state or a state in which the vibration of the
winding process mechanism is assumed to be greater than the
first state.
25 2. The yarn winding device according to claim 1,
characterized in that
the winding process mechanism includes a yarn
processing section adapted to act on the yarn, and a spring
member adapted to urge the yarn processing section in a
30 predetermined direction,
the drive motor moves the yarn processing section or
48 / 52
holds the yarn processing section at a predetermined
position by a drive force that acts against an urging force
of the spring member, and
the motor current adjusting section switches the
first value and the second value to be supplied to the 5 drive
motor based on the urging force of the spring member and
a magnitude of the vibration of the winding process
mechanism.
10 3. The yarn winding device according to claim 1 or
2, further comprising a vibration detecting section adapted
to detect the vibration of the winding process mechanism,
characterized in that the motor current adjusting
section switches the first value and the second value to
15 be supplied to the drive motor according to a detection
result of the vibration detecting section.
4. The yarn winding device according to claim 1 or
2, further comprising a package state acquiring section
20 adapted to measure or calculate at least one of a wound
length of the yarn wound into the package, a diameter of
the package, or a weight of the package, characterized in
that
the motor current adjusting section switches the
25 first value and the second value to be supplied to the drive
motor according to a measurement result or a calculation
result of the package state acquiring section.
5. The yarn winding device according to claim 1 or
30 2, further comprising a winding speed measuring section
adapted to measure a winding speed of the yarn wound into
49 / 52
the package,
characterized in that the motor current adjusting
section switches the first value and the second value to
be supplied to the drive motor according to a measurement
5 result of the winding speed measuring section.
6. The yarn winding device according to claim 1 or
2, further comprising a winding speed setting section
adapted to set a winding speed of the yarn wound into the
10 package,
characterized in that the motor current adjusting
section switches the first value and the second value to
be supplied to the drive motor according to a set value of
the winding speed setting section.
15
7. The yarn winding device according to any one of
claims 1 to 6, characterized in that
the winding process mechanism is a yarn joining
device adapted to carry out a yarn joining operation of a
20 disconnected yarn,
the yarn joining device includes a link mechanism
adapted to transmit a drive force of the drive motor to a
yarn processing section that acts on the yarn,
the link mechanism includes a cam, a cam follower
25 driven by the cam, and a spring member adapted to urge the
yarn processing section in a predetermined direction, and
the cam follower is urged toward the cam by the spring
member.
30 8. The yarn winding device according to any one of
claims 1 to 6, characterized in that
50 / 52
the winding section includes an auxiliary roller
adapted to support the package in an auxiliary manner,
the winding process mechanism includes a cradle
adapted to rotatably support the package, and a contacting
pressure adjusting mechanism adapted to adjust a conta5 cting
pressure between the auxiliary roller and the package by
the drive motor.
9. The yarn winding device according to any one of
10 claims 1 to 8, characterized in that the drive motor is a
stepping motor.
10. A textile machine comprising:
a plurality of yarn winding devices including a yarn
15 supplying section adapted to supply a yarn and a winding
section adapted to wind the yarn supplied from the yarn
supplying section to form a package;
a travelling cart that travels in a direction in which
the plurality of yarn winding devices are arranged;
20 a winding process mechanism that is provided on the
travelling cart and includes a yarn joining device adapted
to connect a yarn disconnected in a yarn winding device that
has made a yarn joining request out of the plurality of yarn
winding devices;
25 a yarn processing section that is provided on the yarn
joining device and adapted to act on the yarn; and
a drive motor that is provided on the travelling cart
and adapted to drive the yarn processing section,
the textile machine being characterized by
30 a motor current adjusting section that sets, to a
first value, a current to be supplied to the drive motor
51 / 52
when a state of the travelling cart is in a first state and
sets, to a second value greater than the first value, a
current to be supplied to the drive motor when the state
of the travelling cart is in a second state different from
the 5 first state,
wherein the second state is a state in which a
vibration of the travelling cart is greater than the first
state or a state in which the vibration of the travelling
cart is assumed to be greater than the first state.
10
11. The textile machine according to claim 10,
further comprising a vibration detecting section adapted
to detect the vibration of the travelling cart,
wherein the motor current adjusting section switches
15 the first value and the second value to be supplied to the
drive motor according to a detection result of the vibration
detecting section.
12. The textile machine according to claim 10,
20 further comprising a travelling state acquiring section
adapted to acquire a value of at least one of speed or
acceleration of the travelling cart,
characterized in that the motor current adjusting
section switches the first value and the second value to
25 be supplied to the drive motor according to the value
acquired by the travelling state acquiring section.