JP2000255901A - Doffing device of automatic winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the snarl or kink of a yarn to be wound and to reduce the yarn cut by arranging a pair of punch forming devices so that forming position of a winding start punch can be changed depending on the stranding direction of the yarn to be wound, or S-strand or Z-strand. SOLUTION: This doffing device 12 has a pair of yarn grasping devices 15 capable of traveling along a rail arranged on the horizontal part of a proper frame and having a cutting and grasping member 15a at the tip, which are substantially linearly arranged. The yarn grasping device 15 has a cylinder 15b having the upper end pivotally supported by a piston mounted on the casing 12a of the doffing device 12 and a piston rod 15c, and the yarn cutting and grasping member 15a capable of cutting a yarn and also grasping it is arranged at the tip of the piston rod 15c. The yarn grasping device 15 is constituted in such a manner as to be capable of approaching or leaving in the direction of a transverse drum 1 by a cam device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doffing apparatus for an automatic winder which unwinds a yarn wound on a yarn supply package such as a spinning bobbin and rewinds the yarn into a winding package of various shapes.

[0002]

2. Description of the Related Art The present applicant has filed Japanese Patent Application No.
In Japanese Patent Application Laid-Open No. 105538 (Japanese Patent Application Laid-Open No. 10-297826), the yarn on the side of the yarn supply package sucked and held by the yarn trap is gripped by the yarn cutting gripping portion of the yarn gripping device, and the full package is discharged. After the yarn is transported to the vicinity of the cradle arm and the yarn is sandwiched between the cradle arm and the winding tube, the winding tube is brought into contact with the rotating traverse drum, and the yarn is moved to a yarn moving device and A doffing device for an automatic winder was proposed in which a winding grip was wound around one end of a winding tube to form a bunch at the beginning of winding.

[0003]

When unwinding a yarn upward from a winding package held vertically on a tray or the like, the yarn is pulled out depending on the twisting direction of the yarn, that is, S twisting or Z twisting. Twist is added (twisted) to the yarn,
Alternatively, the twist is released (untwisted). In the process of unwinding from the winding package, twist is added (twisted) to the drawn yarn, and when the number of twists increases, snare and kink are easily generated, and a clean balloon is drawn from the package to draw the yarn. It is difficult to unwind, causing yarn breakage. Therefore, in the step of rewinding from the winding package, it is important to pull out the yarn from the winding package in the direction in which the drawn yarn is untwisted.

For example, as shown in FIGS. 9 to 12, a conical winding tube 2 (hereinafter simply referred to as a cone bobbin) rotating in contact with a rotating traverse drum 1 is shown. When the winding start bunch y1 is wound around the end, the winding start bunch y1 is connected to the large diameter side 2 of the cone bobbin 2.
Then, the yarn y is wound around the center area excluding both ends of the cone bobbin 2 to form the winding package p. Reference numeral 3 denotes a traverse fulcrum guide.

[0005] As shown in Fig. 13, the winding package p formed in this manner is arranged such that the large-diameter side 2a of the cone bobbin 2 faces downward and the winding start bunch y1 is positioned downward. The tray 4 is held vertically. Then, the yarn y wound around the winding package p is drawn upward.

When the twist direction of the yarn is Z twist, as shown in FIG. 9, when the automatic winder is viewed from the front, the cone bobbin 2 is positioned so that the large diameter side 2a is located on the right side. Is brought into contact with the traversing drum 1 and driven to rotate, and as shown in FIG.
And wound around the cone bobbin 2,
Begin to wind around the end of the large diameter side 2a of the cone bobbin 2, bunch y
Wind one. As shown in FIG. 13, when the yarn y is rewound from the winding package p thus formed, the yarn y is rewound while being untwisted, that is, untwisted. Therefore, the occurrence of snare and kink is suppressed, and the occurrence of yarn breakage is reduced because the yarn is unwound by drawing a clean balloon from the package.

When the twist direction of the yarn is S twist,
As shown in FIG. 11, when the automatic winder is viewed from the front, the large diameter side 2a is located on the left side,
The cone bobbin 2 is brought into contact with the traversing drum 1 to be driven to rotate, and as shown in FIG.
Is wound around the corn bobbin 2 so as to be sandwiched between the traverse drum 1 and the cone bobbin 2 from the front face of the traverse drum 1 in the same manner as in the case where the twist direction of the yarn is the Z twist as described above. The winding bunch y1 is wound around the end of the large diameter side 2a. From the winding package p thus formed, as shown in FIG.
Is unwound, the yarn y is untwisted, that is,
Unwinding is performed while being untwisted, so that the occurrence of snare and kink is suppressed, the yarn is unwound from a package by drawing a clean balloon, and the occurrence of yarn breakage is reduced.

In the above-mentioned example, the case where the winding tube is conical is shown for convenience, but the same applies to the case where the winding tube is a cylindrical winding tube, a so-called straight bobbin. .
That is, if the twist direction of the yarn is Z twist, a bunch is formed at the right end of the straight bobbin, and if the twist direction of the yarn is S twist, a bunch is formed around the left end of the straight bobbin. Form a bunch at the beginning. When the winding package thus formed is held vertically so that the winding start bunch is positioned below, and the yarn is pulled out from above, the yarn is rewound in the direction in which the twist is released. Therefore, the occurrence of snare and kink is suppressed, the yarn is unwound from a package by drawing a clean balloon, and the occurrence of yarn breakage is reduced.

As described above, the position of the bunch winding is determined by whether the twisting direction of the yarn is S twisting or Z twisting.
It needs to be changed at the right end of the winding tube or at the left end of the winding tube.

However, in the above-described conventional doffing apparatus for an automatic winder, only one winding start bunch forming device including a yarn gripping device and a yarn pulling device for forming a winding start bunch is provided. Therefore, depending on whether the twist direction of the yarn is S twist or Z twist,
The position of the bunch winding cannot be changed.Therefore, when unwinding the yarn from the winding package, there is a winding package that is unwound while twisting is added, and in a direction in which snare and kink tend to occur. Since the yarn is unwound, stress is applied to the yarn, and it becomes difficult for the unwound yarn to draw a clean balloon from the package.
There is a problem that the frequency of occurrence of yarn breakage increases.

An object of the present invention is to solve the problems of the above-described conventional doffing apparatus for an automatic winder.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention firstly sets the bunch of a bunch at the beginning of winding depending on the twisting direction of the wound yarn, that is, S twisting or Z twisting. The winding start bunch forming device is provided in a pair so that the forming position can be changed. Secondly, the yarn gripping device and the yarn pulling device that constitute the winding start bunch forming device are moved between the operating state and the non-operation state. Thirdly, the doffing device which travels along the winding unit is provided with switching means for responding to the zone detection command means provided on the machine base. It is arranged such that one of a pair of winding start bunch forming devices is set to an operating state or a non-operating state by switching the switching means by a zone detection command means.

[0013]

Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments unless it departs from the gist of the present invention.

Reference numeral 5 denotes a yarn feeder package held vertically on the tray 4. The yarn y drawn upward from the yarn feeder package 5 includes a yarn clearer 6 for detecting a yarn defect having a cutter 6a and a yarn. It is wound as a winding package on the rotating winding tube 2 (in this embodiment, a cone bobbin is used), which comes into contact with the rotating traverse drum 1 via the joining device 7 and rotates. Can be

Reference numeral 8 denotes a cone bobbin 2 as a winding tube,
A cradle arm 9 is gripped so as to be sandwiched between two arms. Reference numeral 9 denotes a yarn trap as a yarn end catching means for sucking and holding the yarn y of the yarn supply package 5 cut by the cutter 6a of the yarn clearer 6. is there. Reference numeral 10 denotes a guide member disposed behind the traverse drum 1, and 1
Reference numeral 1 denotes a conveyor disposed behind the guide member 10 for transporting a full winding package.

When the winding package p becomes full, a cutter 6a of the yarn clearer 6 is operated by a winding package full signal from a control device (not shown).
Is operated to cut the yarn y. The cut yarn y on the yarn supply package 5 side is sucked and captured by the yarn trap 9, and the yarn y on the traverse drum 1 side is wound into a full winding package. Next, the cradle arm 8 holding the full winding package
Is rotated in a direction away from the traversing drum 1, and the cradle arm 8 is expanded by a cradle arm expanding member (not shown), and the full package is placed on the guide member 10. And guide member 1
The full package taken up on the roll 0 rolls on the guide member 10 in the direction of the conveyor 11, is placed on the conveyor 11, and is transported to a predetermined place.

Reference numeral 12 denotes a horizontal portion 13 of an appropriate frame 13.
The doffing device is a doffing device that can travel along the rails 14 provided on the a. The doffing device 12 includes a pair of yarn gripping devices 15 having a thread cutting gripping member 15a at the tip, that is, two yarn gripping devices. They are arranged substantially vertically. The thread gripping device 15 has a cylinder 15b and a piston rod 1 whose upper ends are pivotally supported by pins 16 attached to a housing 12a of the doffing device 12.
5c, and at the tip of the piston rod 15c,
A thread cutting and holding member 15a capable of cutting and holding the thread is provided. The yarn gripping device 15 is configured to be able to approach or separate in the direction of the traverse drum 1 by a cam device described later.

Reference numerals 17 denote bunch guides respectively attached to two arms of the cradle arm 8 which grips the cone bobbin 2. The bunch guide 17 is, for example,
The traverse drum 1 is configured as a hook having an opening at the center portion side, and cooperates with the above-described yarn gripping device 15 to
It has a function of holding the yarn y at the winding start bunch forming position at the end of the large diameter side 2a of the cone bobbin 2.

Reference numeral 18 denotes a thread pulling device provided below a pair of vertical frames 12b which are suspended from both ends of the housing 12a of the doffing device 12. The thread pulling device 18 includes a swing arm 18b rotatably pivoted to a vertical shaft 18a attached to the vertical frame 12b, and a substantially T-shaped thread puller pivotally supported at the tip of the swing arm 18b. It has a lever 18c, and a thread catching portion 18c 'is formed at the tip of the thread pulling lever 18c.
8c is formed with a long hole 18c ". A connecting arm 18d is rotatably connected to the shaft 18a, and a pin 18d 'provided at the end of the connecting arm 18d is connected to a thread pulling lever 18c. The coil spring 1 fitted in the elongated hole 18c "formed in the shaft 18a and fitted in the shaft 18a.
One end of 8e is locked to the shaft 18a, and the other end of the coil spring 18e is locked to the connecting arm 18d. By the urging force of the coil spring 18e, the connecting arm 18d is shown in FIG. The yarn pulling lever 18
In a standby state where c is away from the traverse drum 1, the traverse drum 1 is configured to be located at the end of the long hole 18c ″. One end of 18f is connected to the swing arm 18b. The other end is a connecting rod pivotally supported at one end of a substantially V-shaped bell crank 18g, and the other end of the bell crank 18g is rotatably supported by a shaft 18h at the center thereof. The other end of the bell crank 18g is pivotally supported by a link lever 19 which is moved up and down by a cam device described later.

The link lever 1 is operated by a cam device described later.
When 8 is moved downward, the bell crank 18g
The pivot arm 18b is rotated clockwise about the shaft 18h, so that the swing arm 18b is connected to the shaft 18a via the connecting rod 18f.
Is rotated clockwise around the center. By the clockwise rotation of the swing arm 18b, the thread pulling lever 18c also rotates clockwise, that is, in the direction of the traverse drum 1, and at the same time, the coupling arm urged clockwise by the coil spring 18e. 18d also rotates in the traverse drum 1 direction. As described above, the clockwise rotation of the bell crank 18g caused by the downward movement of the link lever 19 causes the swing arm 18b, the thread pulling lever 18c, and the connection arm 18d to be integrally formed via the connection rod 18f. Although the connecting rod 18f rotates in the direction of the traverse drum 1, the connecting rod 18f hits a stopper (not shown) at a position close to the traverse drum 1, and its rotation is prevented. The lever 18c integrally rotates in the traverse drum 1 direction. When the swing arm 18b and the yarn pulling lever 18c continue rotating integrally in the direction of the traverse drum 1, the rocking movement of the rocking arm 18b and the yarn pulling lever 18c in the direction of the traverse drum 1 is performed. In addition, a pivotal movement of the tip of the thread pulling lever 18c around a pin 18d 'located at an end of the connecting rod 18f remote from the traverse drum 1 is applied, thereby forming a thread catching portion 18c' of the thread pulling lever 18c. The moved portion moves toward the end of the traverse drum 1 substantially parallel to the axis of the traverse drum 1.

As described above, the bunch guides 17 are attached to the two cradle arms 8 for holding the cone bobbin 2, respectively.
2, a pair of thread gripping devices 15 and a pair of thread pulling devices 18 are disposed with the central portion of the traverse drum 1 interposed therebetween. The bunch guide 17, the yarn gripping device 15, and the yarn pulling device 18 located at one end of the traverse drum 1
Constitutes one winding start bunch forming device B1. The bunch guide 17, the yarn gripping device 15, and the yarn pulling device 18 located at the other end of the traverse drum 1 form the other. Winding bunch forming device B2
In the doffing device of the present invention, the winding start bunch devices B1 and B2 including the bunch guide 17, the yarn gripping device 15 and the yarn pulling device 18 are paired, that is,
Two sets are provided.

Next, the drive mechanism of the yarn gripping device 15 and the yarn pulling device 18 will be described mainly with reference to FIGS.

Reference numeral 20 denotes a cam shaft supported by a suitable bearing provided in the doffing device 12, and is appropriately rotated via a pulley 22 by a belt 21 driven by a motor (not shown). It is configured to: The rotation timing and the like of the cam shaft 20 are configured to be controlled by a command from the control device of the doffing device 12 in accordance with the operation timing of the doffing operation.

Reference numeral 23a denotes a yarn moving device driving cam attached to the cam shaft 20. Reference numeral 24 denotes an arm support shaft disposed in parallel with the cam shaft 20. The arm support shaft 24 has a substantially V-shaped operation lever 23b attached thereto. A cam follower 23c that is in contact with the device driving cam 23a is provided. The operation lever 23b is disposed on the operation lever 23b between the tip of one branch portion 23b 'of the substantially V-shaped operation lever 23b and the pin 23d attached to the frame of the doffing device 12. A coil spring 23e that urges the cam follower 23c so as to abut the yarn moving device driving cam 23a is stretched. The operation lever 2 is controlled by the coil spring 23e.
3b is urged to rotate counterclockwise in FIG. The upper end of the link lever 19 described above is pivotally supported at the tip of the other branch 23b ″ of the substantially V-shaped operation lever 23b.

Reference numeral 23f denotes a substantially L-shaped stop lever pivotally supported at the center of the shaft 23g. One end 23f 'of the stop lever 23f is connected to one branch 23b of the operation lever 23b. ′, And the other end 23f ″ of the stop lever 23f is connected to the doffing device 1
The second frame is pivotally supported by a piston rod 23h 'of a cylinder 23h. When the cylinder 23h is operated and the piston rod 23h 'is advanced, the stop lever 23f rotates counterclockwise about the shaft 23g, and one end 23f' of the stop lever 23f is moved to the operation lever 23b. Is configured to be located above one of the branch portions 23b ′. In this state, when the camshaft 20 rotates, the yarn moving device driving cam 23a rotates, and the cam follower 23c moves from the large diameter portion to the small diameter portion of the yarn moving device driving cam 23a, the operation lever 23b is moved. , Around the arm support shaft 24, so that the link lever 19 pivotally supported by the tip of the other branch portion 23b "of the operation lever 23b moves downward. .
When the link lever 19 moves downward, as described above, the portion where the thread catching portion 18c 'of the thread pulling lever 18c is formed is substantially parallel to the axis of the traverse drum 1, It will move toward the end.

When the piston rod 23h 'is retracted, the stop lever 23f moves around the shaft 23g.
It is configured to rotate clockwise so that one end 23f ′ is disposed close to one branch 23b ′ of the operation lever 23b. Thus, stop lever 2
3f, one end 23f 'of the operating lever 23b is arranged close to one branch 23b' of the operating lever 23b.
0 rotates, the yarn moving device driving cam 23a rotates, the cam follower 23c moves from the large diameter portion to the small diameter portion of the yarn moving device driving cam 23a, and the operation lever 23b moves around the arm support shaft 24. However, even if the operation lever 23b is turned in the counterclockwise direction, the one branch portion 23b 'of the operation lever 23b contacts the one end 23f' of the stop lever 23f, and the operation lever 23b is turned counterclockwise. Since the link lever 19 is blocked, the link lever 19 does not move downward, so that the yarn pulling device 18 does not operate.

The yarn driving device driving cam 23a constituting the driving mechanism of the yarn driving device 18 as described above is provided with a pair of winding start bunch forming devices B1, B2 composed of the bunch guide 17, the yarn gripping device 15, and the yarn driving device 18. A pair, ie, two, are attached to the camshaft 20 at a predetermined interval in correspondence with the operation lever 23b, the stop lever 23f, etc., corresponding to the pair of thread puller driving cams 23a. Are also provided in a pair.

The above-described cam shaft 20 has a thread gripper drive cam 25a attached thereto, and the arm support shaft 24 has a cam follower 25b abutting on the thread gripper drive cam 25a. The operation lever 25c is attached. One end 25c 'of the operation lever 25c on the side where the cam follower 25b is disposed with the arm support shaft 24 interposed therebetween.
A link rod 25d is provided between the cylinder and the cylinder 15b of the yarn gripping device 15 described above. Further, between the other end 25c "of the operation lever 25c and the cylinder 15b, the operation lever 25c is biased so as to rotate counterclockwise about the arm support shaft 24, and the operation is performed. Cam follower 2 arranged on lever 25c
A coil spring 25f for urging the 5b so as to contact the thread gripping device driving cam 25a is stretched.

Reference numeral 25g denotes a substantially L-shaped stop lever pivotally supported at the center of the shaft 25g. One end 25g 'of the stop lever 25g is located near the end 25c "of the operation lever 25c. And the stop lever 25
The other end 23f "of g is pivotally supported by a piston rod 23h 'of the cylinder 23h disposed on the frame of the doffing device 12. The cylinder 23h is operated to advance the piston rod 23h'. When you let
The stop lever 25g rotates counterclockwise around the shaft 23g, and one end 25g ′ of the stop lever 25g is
5c is located above the end portion 25c ″. In such a state, the cam shaft 20 rotates, the thread gripping device drive cam 25a rotates, and the cam follower 25b
Moves from the large-diameter portion to the small-diameter portion of the thread gripping device drive cam 25a, the operation lever 25c rotates counterclockwise in FIG. The cylinder 15b of the thread gripping device 15 is connected via a link rod 25d provided at the end 25c '.
However, it is configured to be able to move around the pin 16 in the counterclockwise direction, that is, in the traverse drum 1 direction.

When the piston rod 23h 'of the cylinder 23h is retracted, the stop lever 25g is
It is configured to rotate clockwise about the shaft 23g, and to arrange one end 25g ′ close to the end 25c ″ of the operation lever 25c. In this way, the stop lever is configured. In a state where one end 25g ′ of the 25g is located close to the end 25c ″ of the operation lever 25c, the cam shaft 20 rotates, the thread gripper driving cam 25a rotates, and the cam follower 25b is rotated. , Yarn gripping device drive cam 25
a from the large-diameter portion to the small-diameter portion,
However, even if the control lever 25c rotates about the arm support shaft 24 in the counterclockwise direction, the end 25c ″ of the operation lever 25c abuts against one end 25g ′ of the stop lever 25g, and the operation lever 25c counterclockwise rotates. Since the rotation in the direction is prevented, the link rod 25d does not move, and therefore, the cylinder 15b of the thread gripping device 15 does not move in the traverse drum 1 direction.

The drive cam 25a of the yarn gripping device, which constitutes the drive mechanism of the yarn gripping device 15 as described above, comprises a pair of winding start bunch forming devices B1, B2 composed of the bunch guide 17, the yarn gripping device 15, and the yarn pulling device 18. Corresponding to the pair of thread gripping device driving cams 25a, a pair of operating levers 25c, stop levers 25g, and the like are attached to the camshaft 20 at predetermined intervals. Are also provided in a pair. The two stop levers 23f, 2
5g is provided with one cylinder 23h and operated simultaneously.

Next, the bunch guide 17 and the yarn gripping device 15
The operation of the doffing device of the automatic winder provided with the pair of winding start bunch forming devices B1 and B2 including the yarn pulling device 18 will be described.

As shown in FIG. 9, when the yarn y is Z-twisted, the cone bobbin is positioned so that the large diameter side 2a is located on the right side when the automatic winder is viewed from the front. 2 is brought into contact with the traverse drum 1 and driven to rotate, and a winding start bunch y1 is formed at the end of the large diameter side 2a of the cone bobbin 2. in this way,
The cone bobbin 2 is positioned so that the large diameter side 2a is located on the right side.
In this case, the bunch forming device B1, which is provided on the right side and includes the bunch guide 17, the yarn gripping device 15, and the yarn pulling device 18, is operated. . In this case, the cylinder 2 of the winding start bunch forming device B2 disposed on the left side
The piston rod 23h 'of 3h is retracted, and the stop lever 23f is rotated clockwise, so that one end 23f' is disposed close to one branch 23b 'of the operation lever 23b. Thus, the stop lever 23f
Is arranged close to one branch 23b 'of the operating lever 23b, so that the camshaft 20
Rotates, the yarn moving device driving cam 23a rotates, the cam follower 23c moves from the large diameter portion to the small diameter portion of the yarn moving device driving cam 23a, and the operation lever 23b moves around the arm support shaft 24. , Even if you try to rotate counterclockwise,
One branch 23b 'of the operation lever 23b abuts on one end 23f' of the stop lever 23f, and the operation lever 23f is prevented from rotating counterclockwise, so that the link lever 19 is moved downward. There is no movement, so that the yarn pulling device 18 of the winding start bunch forming device B2 disposed on the left side does not operate. Similarly, the stop lever 25g is rotated clockwise and its one end 25g '
Is disposed close to the end 25c ″ of the operation lever 25c. Thus, the one end 2 of the stop lever 25g is
Since 5g 'is arranged close to the end 25c' of the operation lever 25c, the cam shaft 20 rotates, the thread gripper driving cam 25a rotates, and the cam follower 25b
When the operation lever 25c moves from the large-diameter portion to the small-diameter portion of the thread gripping device driving cam 25a and tries to rotate counterclockwise about the arm support shaft 24, the end portion 25c ″ of the operation lever 25c is moved. , One end 25 of the stop lever 25g
g ', and the rotation of the operation lever 25c in the counterclockwise direction is prevented, so that the link rod 25d does not move. Therefore, the yarn gripping of the winding start bunch forming device B2 disposed on the left side. The device 15 does not operate.

As described above, the cone bobbin 2 is arranged on the traverse drum 1 so that the large diameter side 2a is located on the right side, and the winding start bunch y1 is placed at the end of the large diameter side 2a of the cone bobbin 2. In the case of forming, the winding start bunch forming device B1 located on the right side is set to the operating state, and the winding start bunch forming device B2 positioned on the left side is set to the non-operating state as described above, and the ball is set by the doffing device of the automatic winder. Perform frying. That is, when the winding package p is full, the cutter 6a of the yarn clearer 6 is operated to cut the yarn y by a winding package full signal from a control device (not shown). . The cut yarn y on the yarn supply package 5 side is sucked and captured by the yarn trap 9, and the yarn y on the traverse drum 1 side is wound up into a full winding package p. Then
The cradle arm 8 holding the fully loaded winding package p is rotated in a direction away from the traversing drum 1, and the cradle arm 8 is expanded by a cradle arm expanding member (not shown). The fully loaded winding package p is placed on the guide member 10, and the fully loaded winding package p placed on the guide member 10 rolls on the guide member 10 in the direction of the conveyor 11. Is placed on the conveyor 11 and transported to a predetermined place.

The cylinder 15b of the yarn gripping device 15
Is operated, the piston rod 15c is advanced downward, and the cutting and holding member 15a holds the yarn y sucked and captured by the yarn trap 9 and cuts the yarn y on the yarn trap 9 side. Next, the piston rod 15c is retracted, the thread cutting gripping member 15a gripping the thread end is raised to above the cradle arm 8, and the camshaft 20 is rotated as described above.
By rotating the yarn gripping device drive cam 25a, the cylinder 15b of the yarn gripping device 15 is moved through a link rod 25d provided at an end 25c 'of the operation lever 25c.
Is moved in the traverse drum 1 direction.

Further, by rotating the cam shaft 20 and rotating the yarn moving device driving cam 23a, the yarn moving lever 18c constituting the yarn moving device 18 is rotated in the direction of the traverse drum 1 as described above. Let it. Thread pull lever 18c
During rotation of the traverse drum 1 in the direction of the traverse drum 1, the yarn y gripped by the yarn cutting and gripping member 15a of the yarn gripping device 15 is captured by the yarn catching portion 18c 'of the yarn pulling lever 18c, and the cradle arm 8 Is moved in the direction of the bunch guide 17 attached thereto, and inserted into the bunch guide 17.
At this time, as described above, when the yarn pulling lever 18c approaches the bunch guide 17, the portion where the yarn hooking portion 18c 'of the yarn pulling lever 18c is formed is substantially parallel to the axis of the traverse drum 1. In addition, since the traverse drum 1 is configured to move in the end direction,
The insertion of the thread y into the bunch guide 17 by 8c can be performed easily and reliably.

Next, the cone bobbin 2 is arranged between the extended cradle arms 8 by a cone bobbin supply device (not shown),
Are moved in a direction approaching each other, and the cone bobbin 2 is gripped by the cradle arm 16.
At this time, it is inserted into the bunch guide 17 and
The thread y gripped by the thread cutting gripping member 15a of
The cradle arm 8 on the large diameter side 2a of the cone bobbin 2 is configured to be located between the large diameter side 2a of the cone bobbin 2 gripped by a cone bobbin supply device (not shown). The cradle arm 8 is held by the holding operation of the cone bobbin 2.
And the cone bobbin 2. After the yarn y is clamped by the cradle arm 8 and the cone bobbin 2, the gripping of the yarn end by the yarn cutting and gripping member 15a of the yarn gripping device 15 is released.

Next, the cradle arm 8 holding the cone bobbin 2 is rotated in the direction of the traverse drum 1 rotating at a low speed, so that the cone bobbin 2 comes into contact with the traverse drum 1 and the cone bobbin 2 is rotated. 17
Accordingly, the yarn y held at the winding start bunch position on the large diameter side 2a of the cone bobbin 2 is wound at the winding start bunch position of the cone bobbin 2, and the winding start bunch y1 is formed.

Simultaneously with or before or after the winding start bunch y1 is formed, the yarn pulling device 18 and the yarn gripping device 15 are configured to separate from the traverse drum 1 and return to the standby position. The yarn y inserted into the bunch guide 17 by the separation of the yarn pulling device 18 from the traverse drum 1 escapes from the bunch guide 17 due to the tension and is inserted into the traverse groove formed in the traverse drum 1. Then, the traverse is resumed. At this point, the traverse drum 1 is rotating at a normal rotation speed.

After the above-described winding start bunch forming operation is completed, the rotation of the cam shaft 20 is stopped.

As shown in FIG. 11, the yarn y
When the S-twist is applied, when the automatic winder is viewed from the front, the cone bobbin 2 is brought into contact with the traversing drum 1 and rotated so that the large-diameter side 2a is located on the left side, The winding start bunch y1 is formed at the end of the large diameter side 2a of the cone bobbin 2. Thus, when the cone bobbin 2 is brought into contact with the traversing drum 1 and driven to rotate so that the large-diameter side 2a is positioned on the left side, the winding start bunch forming device B disposed on the right side
The operation of 1 is blocked by the stop levers 23f and 25g, and the winding start bunch forming device B2, which is provided on the left side and includes the bunch guide 17, the yarn gripping device 15, and the yarn pulling device 18, is operated. The operation order and the like are the same, and thus will be omitted.

According to the present invention, as described above, a pair of, ie, two, winding start bunch forming devices B1 and B2 including the bunch guide 17, the yarn gripping device 15 and the yarn pulling device 18 are arranged, and the yarn is twisted. Depending on whether the direction is S twist or Z twist, one winding start bunch forming device B1, B
2 is prevented, and the other winding start bunch forming devices B1 and B2 are operated, so that when the yarn is pulled upward from the winding package formed by the automatic winder, the twist is always formed. Since the yarn is pulled out while being released, the occurrence of snare and kink is successfully suppressed in the yarn to be rewound, and the yarn is unwound from a package by drawing a clean balloon, thereby reducing the occurrence of yarn breakage. .

In the above-described embodiment, one of the winding start bunch forming devices B1 and B2 is configured to be activated or deactivated according to the position of the stop levers 23f and 25g. The yarn driving device driving cam 23a as described above is attached to the rotating cam shaft.
And the thread gripping device drive cam 25a is disposed in a free state, and the clutch drive cam having the clutch latch is attached to the cam shaft by approaching the thread pulling device drive cam 23a and the thread gripper drive cam 25a. Then, the clutch latch is engaged with the thread pulling device driving cam 23a or the thread gripping device driving cam 25a via a cylinder or an appropriate lever to drive the cam shaft. It can also be configured to transmit to the device drive cam 25a.

FIG. 14 shows an automatic winder in which a number of winding units w including the traversing drum 1, the winding tube 2, the yarn clearer 6, the piecing device 7 and the like are juxtaposed. In the winding unit w located on the left half of the automatic winder, the cone bobbin 2 is disposed so that the large diameter side 2a is located on the right side. In the winding unit w located on the right half of the automatic winder, On the left side, an example is shown in which the cone bobbin 2 is disposed so that the large diameter side 2a is located. Therefore, during the doffing operation of the winding unit w located on the left half of the automatic winder, the winding start bunch forming device B1 located on the right side disposed on the doffing device traveling along the winding unit w. Operates, and during the doffing operation of the winding unit w located on the right half of the automatic winder, the winding start bunch forming device B2 located on the left side provided in the doffing device.
Will operate. In such a case, the large diameter side 2
a at a suitable position such as the horizontal portion 13a of the frame 13 or the front surface of the rail 14 located between the winding unit w whose left side is located on the left side and the winding unit w whose large diameter side 2a is located on the right side. And the doffing device 12 is provided with switching means d2 such as a reed switch which responds to the zone detecting command means d1, and the doffing device 12 has the switching means d2.
Is switched by the zone detection command means d1, and by switching the switching means d2, the above-described cylinder 23h is appropriately operated via a control device (not shown) to change the positions of the stop levers 23f and 25g. Thus, either one of the pair of winding start bunch forming devices B1 and B2 disposed in the doffing device can be configured to be in an operation state or a non-operation state. Needless to say, the number and arrangement of the winding units w on the left side where the large-diameter side 2a is located and the winding units w on the right side where the large-diameter side 2a is located are not limited to those in the above-described embodiment, and are appropriately set. , Can be set. With this configuration, the automatic winder can be appropriately divided into a winding unit w where the large diameter side 2a is located on the left side and a winding unit w where the large diameter side 2a is located on the right side, The versatility and availability of the automatic winder are improved.

[0045]

Since the present invention has the above-described structure, the following effects can be obtained.

The position of the bunch winding can be changed depending on whether the twist direction of the yarn is S twist or Z twist, and therefore, when the yarn is pulled upward from the winding package formed by the automatic winder. Since the yarn is always drawn in the direction in which the twist is released, snare and kink are suppressed in the unwound yarn, and the yarn is unwound by drawing a clean balloon from the package, thereby reducing the occurrence of yarn breakage. .

Since switching means for switching between the thread gripping device and the thread pulling device provided in the doffing device between an active state and a non-active state is provided, all the windings can be performed by one doffing device. The winding start bunch of the unit can be appropriately formed.

The doffing apparatus running along the winding unit is provided with switching means for responding to the zone detection command means provided on the machine base, so that the versatility and availability of the automatic winder are improved. improves.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an automatic winder and a doffing apparatus.

FIG. 2 is a partial schematic front view of an automatic winder and a doffing apparatus.

FIG. 3 is a partially enlarged side view of an automatic winder and the like including a vertical section of a winding tube.

FIG. 4 is a perspective view of a yarn pulling device of the doffing device.

FIG. 5 is a partially enlarged plan view of an automatic winder and a doffing apparatus.

FIG. 6 is a schematic plan view of a driving mechanism of a yarn gripping device and a yarn pulling device of the doffing device.

FIG. 7 is a partially enlarged side view of a drive mechanism of the yarn pulling device of the doffing device.

FIG. 8 is a schematic side view of a drive mechanism of a thread holding device of the doffing device.

FIG. 9 is a schematic front view of a traverse drum, a winding tube, and the like of the automatic winder.

FIG. 10 is a schematic side view of a traverse drum, a winding tube, and the like of an automatic winder.

FIG. 11 is a schematic front view of a traverse drum, a winding tube, and the like of the automatic winder similar to FIG.

FIG. 12 is a schematic side view of a traverse drum, a winding tube, and the like of the automatic winder similar to FIG.

FIG. 13 is a front view showing a state in which a yarn is pulled out from a winding package formed by an automatic winder.

FIG. 14 is a schematic front view of the automatic winder and the doffing apparatus.

[Explanation of symbols]

 1 traversing drum 2 corn bobbin 12 doffing device 15 ..... Thread gripper 18 ... Thread puller

Claims (3)

[Claims] The present invention is characterized in that a pair of winding start bunch forming devices are disposed so that the formation position of the winding start bunch can be changed depending on the twist direction of the yarn to be wound, that is, S twist or Z twist. Automatic winder doffing equipment. 2. The apparatus according to claim 1, further comprising a switching means for switching between a thread gripping device and a thread pulling device constituting the winding start bunch forming device between an operating state and a non-operating state.
An automatic winder doffing apparatus according to claim 1. 3. A doffing apparatus which travels along a winding unit is provided with switching means responsive to zone detection command means provided on the machine base, and the switching means is controlled by the zone detection command means. The doffing apparatus for an automatic winder according to claim 1 or 2, wherein one of the pair of winding start bunch forming apparatuses is switched to be activated or deactivated. .