JPH0144538Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a yarn end processing device for an automatic tube winding machine that winds yarn around a tubular bobbin used in a knitting machine.

As a tube winding device for winding thread onto a tubular bobbin for a knitting machine, both ends of the tubular bobbin are supported between drive shafts,
The thread to be wound is supported by the swinging arm of the traversing device, and the tubular bobbin is rotated by rotation of the drive shaft, and the traversing device is moved along the longitudinal direction of the tubular bobbin to wind a predetermined amount of thread onto the tubular bobbin. Automatic tube winding machines are commonly used.

However, in this type of automatic tube winding machine, when winding is finished, the thread is cut, the winding bobbin is dropped, and an empty tubular bobbin is attached to the drive shaft to automatically replace the bobbin. Since the thread end of the tubular bobbin that falls after finishing the process is a free end, the thread end naturally unravels. Therefore, in the past, it was necessary for a worker to pick up each tubular bobbin that fell after winding and tie the thread end to the bobbin, which made it difficult to wind the tubular bobbin with a good rate of rotation. There was a problem that I couldn't do.

This invention was made to solve the above problem, and when the winding on the tubular bobbin is finished, the thread end is automatically held by a part of the tubular bobbin to prevent it from unraveling. To provide a yarn end processing device for an automatic tube winding machine, which eliminates the need for manual knotting and can efficiently wind winding.

Hereinafter, embodiments of this invention will be described based on the drawings.

FIG. 1 shows a perspective view of the tubular bobbin 1. A flange 1a is provided at the end of the tubular bobbin 1, and a thread end pinching portion 2 is provided above the flange 1a, that is, at a location corresponding to the base of the tubular bobbin 1. It is being The pinching part 2 is formed by fitting a coiled spring 2a between two flanges with a slight gap between them, and when the yarn end is wound around this pinching part 2, the free end of the yarn is wrapped around the coiled spring 2a. It is a structure that is sandwiched between.

FIG. 2 shows an overall front view of the automatic tube winding machine, and FIG. 3 shows a front view of its yarn end processing device. In FIG. 2, 3 is a horizontally supported spindle shaft, which is connected to a motor 4 via a clutch and gears. A bobbin support part 5 that supports the end base of the tubular bobbin 1 and transmits rotation is provided at the tip of the spindle shaft 3, and the bobbin support part 5 has a cover part 6 that covers the sandwiching part 2 at the base of the tubular bobbin 1. is provided. A receiving portion 7 rotatably supports the tip of the tubular bobbin 1 between it and the bobbin support 5 of the spindle shaft 3, and has a structure capable of sliding in the axial direction. 8 is a swinging arm 1 that supports and swings the thread 9;
0, the traverse device is slidably supported on horizontal guide rails 11a and 11b and screwed into the center so as to move along the longitudinal direction of the horizontally supported tubular bobbin 1. It is moved by the rotation of the screw rod 12. Reference numeral 13 denotes a cam for swinging the swinging arm 10 provided in the traversing device 8. The cam 13 is rotationally driven while moving in the axial direction by the rotating shaft 14, and the cam surface is provided with a shaft 10a of the swinging arm. The connected driven portion 10b is in contact with it (FIG. 3). 15 is a push rod that tilts the swinging arm 10 of the traversing device 8 located at the left end independently of the cam 13, and the swinging arm 10 is stopped at the left end by an operating cam 16 and a lever 17 that follows it. The driven part 10b of the archem 10 is pushed to tilt the swinging arm 10 to the left. Figure 4 shows a bobbin support 5 attached to the tip of the spindle shaft 3.
shows a cross section. Reference numeral 18 denotes a catch portion that holds the end base of the tubular bobbin 1 that is fitted to the tip of the spindle shaft 3 so as to be slidable back and forth.A coil spring 19 is inserted into the fitting hole to support the tip of the tubular bobbin 1. When the receiving part 7 slides to the right,
The catch portion 18 moves to the right due to the force of the coil spring 19, and the tubular bobbin 1 supported there
is pushed out to the right and removed from the tube winding machine. A tubular bobbin 1 is provided on the outer periphery of the catch portion 18.
A cover part 6 is slidably fitted on the outside to cover the end base of the body and prevent it from falling. The cover portion 6 is urged rightward by a coil spring 20 fitted around the outer periphery of the spindle shaft 3. Reference numeral 21 denotes an annular portion slidably fitted to the outer periphery of the central portion of the cover portion 6, which sandwiches the yarn between it and the cover portion 6 at the beginning of winding the yarn;
and is configured to slide the cover part 6 to the left by a cover part sliding means 22 to be described later,
Coil spring 2 fitted around the outer periphery of spindle shaft 3
3, the cover portion 6 is urged to the right. Reference numeral 24 denotes an operating arm of the cover sliding means 22, which is pivoted so as to be horizontally slidable, and its tip engages with the central recess of the annular portion 21, causing the coil spring 23 to be compressed in the compression direction, that is, in the left direction. The annular portion 21 and the cover portion 6 are moved by a predetermined distance. This actuating arm 24 is, for example, the actuating cam 1
The drive unit is connected to a drive unit that operates a cam or the like so as to be operated at a predetermined timing by a cam rotating in synchronization with the drive unit 6, and this drive unit can also be constituted by a fluid pressure cylinder or the like.

Next, the operation of the automatic tube winding machine and the yarn end processing device will be explained.

First, a new tubular bobbin 1 to be wound with yarn is inserted into a fixed position between the bobbin support part 5 and the receiving part 7 at the tip of the spindle shaft by an arm of a bobbin feeder (not shown), and the receiving part 7 is slid to the left. As a result, the end base of the tubular bobbin 1 is connected to the catch portion 18.
is pushed into the cover part 6, and the tubular bobbin 1 is set. At this time, the end of the thread is attached to the cover part 6.
The swinging arm 1 of the traversing device 8 is held between the step part and the end face of the annular part 21 and is located at the left end.
0 rises and the spindle shaft 3 starts rotating, winding of the thread 9 starts. During winding operation,
The traversing device 8 moves slowly to the right by the rotation of the screw rod 12, and swings the swinging arm 10 by the rotation of the cam 13, so that the thread 9 is wound on the tubular bobbin 1 while being swung. To go. When the traverse device 8 moves to the right end of the tubular bobbin 1, winding of the thread is completed and the spindle shaft 3
is temporarily stopped, and the traversing device 8 returns to the starting position at the left end (the position shown in FIG. 3). Subsequently, the actuating arm 24 is horizontally moved to the left by the operation of the cover sliding means 22, whereby the annular portion 21 is slid to the left to the position shown in FIG. At this time, the cover part 6 also attaches to the annular part 21 from the middle and slides to the left, and the fifth
As shown in the figure, the pinching portion 2 of the tubular bobbin 1 is exposed. At the same time, the actuating cam 16 rotates to push out the push rod 15, and the swing arm 10 of the traversing device 8 is tilted to the left, that is, above the pinching part 2, via the driven part 10b. In this state, the spindle shaft 3 rotates several times, so that the thread 9 is wound so as to be sandwiched between the gaps between the coil springs 2a of the pinching portion 2. Subsequently, the actuating arm 24 moves to the right, and the annular part 21 and the cover part 6 return to their original cover positions, and the push rod 15, which was tilting the swinging arm 10, moves to the left and returns to its original position. Return to
Furthermore, the spindle shaft 3 rotates several times. As a result, the thread is further wound several times around the winding portion of the tubular bobbin 1, and these windings are used for the portion where the thread inevitably unravels when the tubular bobbin 1 finishes winding and falls. Subsequently, the push rod 15 moves to the right again and pushes the driven part 10b, the swinging arm 10 tilts to the left again while holding the thread 9, and at the same time the operating arm 24 moves by half to the left. When the annular portion 21 moves slightly to the left as shown by the two-dot chain line in FIG. 4, a gap is created between the step portion of the cover portion 6 and the right end surface of the annular portion 21. Next, when the receiving part 7 slides to the right in this state, the base of the tubular bobbin 1 is pushed out from the cover part 6 by the catch part 18 by the coil spring 19, and falls from the winding position into the container below. do. Since the thread 9 is still connected to the fallen tubular bobbin 1, the above-mentioned winding is unwound, and the portion sandwiched by the pinching portion 2 remains as it is, preventing the thread from loosening thereafter. Then, when the tubular bobbin 1 falls,
Since the swinging arm 10 supporting the thread is located above the gap between the cover part 6 and the annular part 21, the thread 9 enters this gap, and then the actuating arm 24 moves to the right and the annular part 21 returns to its original position. , the gap is closed, and the thread 9 is held between the right end surface of the annular portion 21 and the stepped portion of the cover portion 6. In this state, the thread 9 is cut between the tubular bobbin 1 and the bobbin support 5 by a cutter (not shown), the push rod 15 is returned to its original position, and the swing arm 10 of the traversing device 8 is moved to the raised position. Return to

When one tube winding operation is completed in this way, a new tubular bobbin 1 is then inserted from the feeder between the bobbin support section 5 and the receiving section 7, and the tube winding operation is repeated in the same manner as above. Ru.

As explained above, according to the thread end processing device of the automatic tube winding machine of this invention, the end of the thread can be caught in the pinching part of the bobbin when winding on the tubular bobbin is completed. It is possible to prevent the thread from unraveling and loosening from the tubular bobbin on which the thread has been wound and dropped. This eliminates the need for manual tying of the yarn ends, which was previously done, and improves the efficiency of the tube winding operation.

[Brief explanation of the drawing]

The figures show an embodiment of this invention, in which Fig. 1 is a perspective view of a tubular bobbin, Fig. 2 is a front view of an automatic tube winder, Fig. 3 is a front view of a yarn end processing device, and Fig. 4 is a bobbin support. FIG. 5 is a sectional view of the cover section 6 with the cover section 6 open, and FIG. 6 is a perspective view showing the state in which the thread is caught. 1...Tubular bobbin, 2...Pinching part, 2a...
Coil spring, 3... Spindle shaft, 5... Bobbin support part, 6... Cover part, 7... Receiving part, 8...
Traverse device, 9... thread, 10... rocking arm, 2
2...Cover portion sliding means.

Claims (1)

[Scope of utility model registration request] A yarn end processing device for an automatic tube winding machine that winds yarn around a tubular bobbin for use in a knitting machine, which is equipped with a pinching part in which a coil spring is wound around the outer periphery of the base of the tubular bobbin. a traversing device that moves along the longitudinal direction of the tubular bobbin and has a swinging arm that supports the thread to be wound; and a bobbin support section at the tip of the spindle shaft. a cover part that covers the pinching part of the tubular bobbin mounted on the tubular bobbin, and a cover part sliding means that slides the cover part to expose the pinching part. tilting the arm of the traversing device above the pinching part, sliding the cover part to expose the pinching part;
1. A yarn end processing device for an automatic tube winder, characterized in that the yarn is configured to be sandwiched within a coil spring of the pinching portion.