JPH08157137A - Residual yarn removing device - Google Patents

Abstract

PURPOSE: To provide a residual yarn removing device of a bobbin by which force necessary to pull out residual yarn can be reduced even in the residual yarn of the bobbin whose yarn layer is fastened hard. CONSTITUTION: A residual yarn removing device of a bobbin is provided with a pulling-out piece 1 which can freely bite residual yarn of the bobbin carried in a prescribed position and a raising-lowering means 3 to pull out the residual yarn by raising and lowering the pulling out piece 1. A cutter is arranged to bite into the residual yarn when the pulling-out piece 1 bites the residual yarn, and the cutter is raised and lowered by interlocking with an ascent and a descent of the pulling-out piece 1. Therefore, since the residual yarn fastened hard to the bobbin is cut and loosens, force necessary to pull out the residual yarn by the pulling-out piece 1 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a residual yarn removing device for removing residual yarn of a bobbin discharged from a machine stand of an automatic winder in a process of rewinding the yarn wound around a bobbin with an automatic winder.

[0002]

2. Description of the Related Art Bobbins are repeatedly reused in the rewinding process of an automatic winder. Therefore, if there is residual yarn on the bobbin, it is necessary to remove the residual yarn. Although the worker may cut off the residual yarn using a knife such as a knife, the residual yarn can be automatically removed from the viewpoint of workability, and the residual yarn removing device can be incorporated into the automatic transfer line of the bobbin. Is required.

As such a residual thread removing device, a withdrawal piece that can be bitten into the residual thread of a bobbin carried into a predetermined position, an opening / closing means for the withdrawal piece, a lifting / lowering means for the withdrawal piece, A bobbin residual yarn removing device is known which is provided with a forward / backward restraining member which is located above the loaded bobbin and restrains the top of the bobbin, and a control means which operates the elevating means and the opening / closing means in association with each other a plurality of times. Has been.

In the bobbin residual thread removing device described above, the lifting / lowering operation of the extraction piece is divided into a plurality of times to reduce the force required for one extraction.

[0005]

However, in the case of the residual thread of the bobbin whose thread layer is tightly tightened, such as in the case of chemical fiber, a considerable force is required just by pulling out even if the pulling operation is divided into a plurality of times. Is. Therefore, the motor output of the elevating means must be increased, and there is a problem that the bobbin whose top is suppressed may be deformed if it is forcibly pulled out with a large force.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to remove residual thread of a bobbin whose thread layer is tightly tightened. An object of the present invention is to provide a bobbin residual yarn removing device that can reduce the required force.

[0007]

SUMMARY OF THE INVENTION A bobbin residual thread removing device of the present invention that achieves the above-mentioned object, is a withdrawal piece that can be bite into the residual thread of a bobbin carried into a predetermined position.
A bobbin residual yarn removing device comprising: an elevating means for raising and lowering the withdrawing piece to remove the residual yarn, wherein a cutter for cutting into the residual yarn is provided when the extracting piece bites into the residual yarn, The gist is to raise and lower the cutter in conjunction with the raising and lowering of the extraction piece.

The cutter is preferably provided at a position preceding the extraction of the extraction piece. The elevating means repeats the operation of raising the extraction piece from the lower limit position by a predetermined stroke and then returning to the lower limit position, and the predetermined stroke is preferably lengthened with each repetition.

[0009]

[Operation] Since the withdrawing piece bites into the residual thread and the cutter bites into the residual thread, the residual thread that is tightly tightened against the bobbin is cut and loosened, and the force required for the extracting piece to withdraw the residual thread is reduced. .

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the essential parts of the residual thread removing device of the present invention.

In FIG. 1, the residual thread removing device comprises a drawing piece (gripper) 1, an opening / closing means 2 for the drawing piece 1, an elevating means 3 for the drawing piece 1, a restraining member 4 for the top of the bobbin B, and an opening / closing means. The control means 5 for the means 2 and the elevating means 3 and a cutter 41 provided on the extraction piece 1 and interlocking with the elevating operation of the extraction piece 1 are the main parts, and these are installed on the base 6.
Further, B is a bobbin, and 7 is a residual yarn detecting device.

The extraction piece 1 comprises a pair of semi-circular members 11,
Each of the semi-circular members 11 and 12 comprises a semi-circular claw 11
a and 12a. And this semi-circular member 11,
12 is held by a holder 13 so as to be slidable in the horizontal direction so that it can take an open position indicated by a solid line and a closed position indicated by a two-dot chain line. When the semicircular members 11 and 12 are closed, a circular space corresponding to a bobbin having a circular cross section is formed at the center of the semicircular members 11 and 12. The semicircular claws 11a and 12a may be opened and closed in a swinging state while drawing a ¼ arc from bottom to top.

A ceramic cutter 41 is attached to one of the pair of semi-circular members 11 and 12 to form a cutter 4.
1 moves up and down in conjunction with the extraction piece 1. The details of the mounting structure of the cutter 41 are shown in FIG. Semicircle member 12
Attaches the first member 12b and the second member 12c to the bolt 12d.
The structure is concluded with. A large diameter round hole 42 and a small diameter round hole 43 are provided in the second member 12c. A slide member 44 that slides in the large-diameter round hole 42 is provided,
A small diameter shaft 45 and a large diameter shaft 46 are connected to the slide member 44. The large diameter shaft 46 penetrates the small diameter hole 43, and the double nut 47 is screwed into the screw provided on the large diameter shaft 46. Then, the end portion of the slide member 44 and the large diameter hole 4
A spring 48 is provided between the second end 12 and the second end, and pushes the slide member 44 to the left in the drawing until the double nut 47 hits the second member 12c. This slide member 44
The cutter body 49 having a 1/4 cross section blade has bolt 5
It is fixed at 0. Reference numeral 51 is a stopper for the rotation of the cutter body 49.

By adjusting the screwing position of the double nut 47, the distance ε between the cutting edge 49a of the cutter body 49 and the bobbin B can be adjusted. It is preferable that this interval ε be as close to zero as possible. And the cutter body 4
When an excessive force acts on 9, the spring 48 is pushed in and the cutter body 49 is pulled in. Further, the double nut 47 prevents the cutter body 49 from excessively protruding and damaging the bobbin.

The cutter 41 includes a semi-circular member 11,
Although the case where it is attached to only one 12 of 12 has been described, it is also possible to attach to both of the semicircular members 11 and 12. Further, the cutter 41 can be attached to a member that independently moves up and down in addition to the extraction piece 1, but in this case, it is necessary to move up and down in conjunction with the extraction piece 1.

Returning to FIG. 1, the semicircular member 11 is a holder 13
It is connected to one end of a V-shaped first link 14 having a fulcrum. The other end of the first link 14 has a pneumatic cylinder 15
It is connected to. The first link 14 has an arm 14a. The semicircular member 12 is connected to one end of a V-shaped second link 16 having a fulcrum on the holder 13. The third link 17 connects the other end of the second link and the arm 14a of the first link. When the pneumatic cylinder 15 extends, the semicircular members 11 and 12 are in the open position indicated by the solid line, and when the pneumatic cylinder 15 is contracted, the semicircular members 11 and 12 are in the closed position indicated by the chain double-dashed line. The pneumatic cylinder 15 is extended or shortened by the control device 5. The links 14, 16 and 17 and the pneumatic cylinder 15 described above constitute the opening / closing means 2.

The holder 13 is attached to a bracket 21, and the bracket 21 is vertically guided by a guide rod 22. The bracket 21 is the nut member 21.
The nut member 21a is engaged with the screw member 23. The screw member 23 is rotatably supported by the frame 24, and the pulley 25 is fitted on the upper end of the screw member 23. The pulley 25 is driven by a motor 28 via a belt 26 and a pulley 27. The screw member 23 is rotated by the motor 28, and the nut member 21 meshed with the screw member 23.
The bracket 21 moves up and down by a. The motor 28 is controlled by the control means 5. And the bracket 2 mentioned above
1, the guide rod 22, the screw member 23 and the motor 28 constitute the elevating means 3. The elevating means 3 and the opening / closing means 2 are interlocked by a control means 5 which will be described below, and are opened when descending and closed when ascending.

The restraining member 4 is composed of stepped rods 31, 32 consisting of a small-diameter rod 31 and a large-diameter rod 32, and a swinging member 33. When the bracket 21 is in the raised position,
The large-diameter rod 32 is on the plate portion 21b of the bracket 21, and the small-diameter rod 31 is the loaded bobbin B.
Is located between the semi-circular members 11, 12 above. FIG.
3, which is a cross-sectional view taken along line BB of FIG. 3, the large-diameter rod 32 has a guide plate 32a, and the guide plate 32a is the frame 24.
Is regulated in the vertical direction by the slit 24a. A stopper 34 is mounted on the large-diameter rod 32, and the lower end of the swinging member 33 covers the stopper 34. In FIG. 1, the swing member 33 is a shaft 33a.
Is swingable in the direction of the arrow with the arm 21 of the bracket 21.
When pressed with c, the position becomes a solid line. As shown in FIG. 4, when the bracket 21 descends, the stepped rods 31, 3 are
2 also descends, and the tip of the small diameter rod 31 contacts the top of the bobbin B. Further, the swinging member 33 swings in the direction by its own weight, the swinging member 33 covers the stopper 34 of the large diameter rod 32, and the top of the bobbin B is suppressed. Bracket 21
When the arm 21c of the bracket 21 rises, the swing member 3
3 is swung in the direction and stepped rods 31, 3
2 also rises and returns to the state of FIG.

In FIG. 1, the remaining yarn detecting device 7 is composed of an arm 36 which is rotatable with respect to the side surface of the bobbin B, and a brush 37 at the tip of the arm 36. When the arm 36 is swung in the direction with respect to the bobbin B conveyed to a predetermined position of the base 6, the presence or absence of residual yarn is detected from the size of the swivel angle α of the arm 36. When the residual yarn detecting device 7 detects the residual yarn, the control device 5 causes the motor 28 of the lifting device 3 and the opening / closing device 2 to operate.
The pneumatic cylinder 15 is operated.

Next, the operation of the above-mentioned residual yarn removing device will be described. The movement of the extraction piece 1 with respect to the residual yarn 8 of the bobbin B of FIG. 1 will be described. The lifting piece 3 lowers the open extraction piece 1 to the lower limit point a. Then, the extraction piece 1 closes at the point a and rises to the point b. At this time, since the cutter 41 is provided at a position preceding the withdrawing direction of the withdrawing piece 1, the residual yarn is cut open first, and the degree to which the residual yarn is tightly tightened with respect to the bobbin is relaxed. Therefore, the remaining yarn in the section a-b is pulled up to the point b by the biting of the extraction piece 1.

Next, the extraction piece 1 is again lowered to the lower limit position of point a, and this time it is raised to point c where the stroke is longer than the previous time. Then, the residual yarn that may remain in the section a-b is pulled up, and the residual thread between the sections bc is cut open by the cutter 41 and pulled up.

Further, the extraction piece 1 is lowered to the lower limit position of point a, and is raised to point d where the stroke is further lengthened. Then, the residual yarn that may remain in the section a-b or the section bc is pulled out, and the residual thread between the sections cd is cut open by the cutter 41 and pulled out. The amount of residual thread decreases as it goes up, making it easier to pull out, so after the last pulling out of the pulling piece 1 reaches the lower limit position of point a,
Climb to the top of the bobbin and pull out the remaining residual thread at once.

When the residual thread cut open by the cutter 41 is partially solidified and falls or comes loose, a suction nozzle is provided in the extracting piece 1 and can be removed during the extracting operation of the extracting piece 1. The residual thread can also be sucked.

As described above, since the residual yarn is cut open by the cutter 41 before the residual yarn is extracted by the extracting piece 1, the force required for the extraction is reduced. This cutter 4
The opening of the residual yarn by 1 may be performed in the vicinity of the extraction piece 1. That is, the cutter 41 preferably precedes the extraction piece, but the extraction piece 1 may precede the cutter 41.

Further, the joint work of the extracting piece 1 and the cutter 41 is repeated while gradually increasing the stroke from the lower side where the residual yarn is tightened more tightly, so compared with the case where the residual yarn is removed by one stroke. Thus, it becomes possible to completely remove the residual yarn by reducing the extraction force of the extraction piece 1. In other words, the residual thread on the bobbin B is moved up by the first raising operation of the extraction piece 1, and by the second raising operation, the lump of the residual thread that has been gathered and hardened is cut by the cutter 41. You will be able to reliably pull out the thread. In this way, it is preferable to move up and down several times to gradually increase the stroke from the lower limit position,
When the amount of residual yarn is small or when the remaining yarn is not so tight, the extracting piece 1 and the cutter 41 may cooperate to extract with a single stroke.

[0026]

Since the residual yarn removing device of the present invention is designed to remove residual yarn by the joint work of the extracting piece and the cutter, even the residual yarn of a hard yarn layer such as a synthetic fiber can be extracted. It can be removed reliably by reducing the required force. Therefore, the capacity of the motor of the lifting means can be reduced, and the deformation of the bobbin can be prevented.

In addition to the joint work of the extraction piece and the cutter, if the cutter precedes the extraction piece, the force required to extract the extraction piece can be further reduced. In addition to the joint work of the drawing piece and the cutter, by adding several reciprocating lifts that gradually lengthen the stroke from the lower limit position, the force required to draw the drawing piece can be further reduced, and the residual thread can be completely removed. Can be removed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a residual yarn removing device of the present invention.

FIG. 2 is a sectional view of a main part of a cutter.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a cross-sectional view showing an operating state of the residual thread removing device.

[Explanation of symbols]

 1 Extraction Piece 2 Opening / Closing Means 3 Lifting Means 4 Controlling Member 5 Control Means 41 Cutter

Claims (3)

[Claims] 1. A bobbin residue comprising a withdrawing piece capable of being bitten into the residual thread of a bobbin carried into a predetermined position, and an elevating means for elevating the withdrawing piece to extract the residual thread. In the yarn removing device, a cutter that bites into the residual yarn when the withdrawing piece bites into the residual yarn is provided, and the cutter is moved up and down in conjunction with the raising and lowering of the withdrawing piece. 2. The residual yarn removing device according to claim 1, wherein the cutter is provided at a position preceding the extraction of the extraction piece. 3. The elevating means repeats an operation of raising the extraction piece from a lower limit position by a predetermined stroke and then returning to the lower limit position, and the predetermined stroke is lengthened with each repetition. The residual yarn removing device according to claim 1.