JPH06345327A - Cross-over yarn cutting method for multi-cup winder - Google Patents

Abstract

PURPOSE:To provide a method for efficiently and surely capturing and cutting a cross-over yarn produced at the time of wrapping yarns collectively and simultaneously on a multi-cup winder. CONSTITUTION:At the time of cutting a cross-over yarn (y) rotated with a bobbin after a yarn is wrapped round a multi-cup winder and a cross-over yarn (y) is formed on bobbins B1 and B2, a cutting means 10 driven by a fluid pressure cylinder 12 is forced to enter a V-shaped space S formed on the joint face of the bobbins. At this time, the cutting means is provided with a guide groove 14 to surely capture the cross-over yarn (y) and surely cut the same by a cutting blade 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting bridging yarns connecting bobbins generated during winding of a multi-cup winder.

[0002]

2. Description of the Related Art Generally, in a multi-cup winder, a catch ring or a slit is provided for each bobbin as a means for catching and cutting a yarn (Japanese Utility Model Publication No. 56-173559). Gazette, Actual Fairness 3-867
No. 6 publication). Then, at the start of winding, the yarn is captured and cut by a catch ring or slit provided for each bobbin, and the yarn is wound on the corresponding bobbin.

However, in such a winding method, it is necessary to thread each catch ring or slit, and it is also necessary to remove the residual yarn caught and cut by the catch ring or slit. Workability is very poor. In particular, when using the catch ring, the catch ring and the bobbin will not be adhered, and the catch ring will be misaligned between them, or the catch ring will be scratched due to damage caused by dropping or scratches during handling. it can. Due to these factors, the ability of the catch ring to capture and cut the yarn decreases, and the threading success rate also decreases. As a result, the time required for the thread hooking work becomes long and the productivity also deteriorates. Therefore, in order to maintain the threading success rate, it is necessary to periodically repair or update the catch ring, but there is a problem that the labor cost and the investment amount required for this are high.

In order to solve these various problems, the following method is used. That is, a means for simultaneously catching and cutting a large number of yarns is provided at one end of the bobbin holder of the multi-cup winder to catch and cut all the yarns. After that, each yarn is transferred to a corresponding bobbin and wound. Therefore, according to this method, since it is not necessary to provide a catch ring or a slit for each bobbin, the above-mentioned problems can be solved.

However, this method has the following new problems. That is, the multiple yarns that are collectively cut and captured at one time run on the other bobbins existing until reaching the target bobbin in a transitional state in which the bobbins are moved to the corresponding bobbins. For this reason, the yarn at this time is left over as a "migrating yarn" across a plurality of bobbins. Since this "crossover thread" is continuously formed over a plurality of bobbins, it is necessary to cut the crossover thread which is an obstacle to the work when doffing each package that has been fully wound.

Conventionally, the operation of cutting such "crossover yarn" has been performed manually. However, in the case of a plurality of packages such as a multi-cup winder, it is complicated to perform such work for each bobbin. Further, since there is an unreasonable work posture for cutting the crossover thread existing on the back side of the winder, there is a problem in that the safety of the worker is protected. Furthermore, in order to meet the automation needs for doffing full-roll packages, it is required to eliminate manual labor.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above problems of the prior art and provides a method for efficiently cutting the transition yarn of a multi-cup winder by a very simple and reliable method. is there.

[0008]

That is, according to the present invention, a plurality of yarns are collectively threaded by a yarn catching and cutting device provided on a bobbin holder of a winder, and then a crossover yarn is formed. In the multi-cup winder that moves the yarn to the corresponding bobbin and winds it, disposing the crossover yarn cutting means at the front position of the mating surface between the bobbins, and after the time when the crossover yarn is formed on the bobbin, There is provided a method for cutting a transition yarn of a multi-cup winder, characterized in that the transition yarn cutting means is moved to a mating surface of a rotating bobbin to cut the transition yarn continuous between the wound bodies.

As the bobbin forming the crossover thread of the present invention, it is preferable that the outer end surface of the bobbin is chamfered so that the mating surface between the bobbins forms a V shape.

Further, it is preferable to cut the jumper thread connected between the wound bodies by a jumper thread cutting means having a guide groove for catching the jumper thread at its tip.

[0011]

[Function] The jumper thread formed when the multi-threads move to each bobbin after the supplementary cutting of the multi-threads is cut by the jumper thread which moves toward the mating surface between the rotating bobbin and the bobbin. Be cut by means. At this time, since the crossover thread is forcibly rotated together with the bobbin, the crossover thread can be easily cut by pressing the crossover thread against the cutting means by utilizing this force.

Here, in order to surely cut the crossover yarn, it is necessary to surely capture the crossover yarn formed on the surface of the bobbin. For this purpose, it is effective to inject the crossover yarn cutting means inward from the surface of the bobbin in the direction of the central axis of the bobbin. Therefore, it is preferable to chamfer the outer end surface of the bobbin so that the mating surface of the bobbin forms a V-shape so that the crossover thread cutting means can easily enter the inside of the bobbin surface. Further, by providing the guide groove capable of catching the crossover thread in the crossover thread cutting means, the crossover thread can be surely and easily cut and cut.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view of an apparatus for carrying out the present invention, FIG.
2A and 2B are explanatory views of the operation of the present invention, and FIG. 2B is an explanatory view showing an embodiment of a crossover yarn cutting means.

In the figure, (1) is a cradle arm type two-cup type winder, and the winder (1) includes:
Cradle arm whose rear end is rotatably supported (2)
Is provided. A spindle (3) driven by a motor (not shown) is provided at the tip of the cradle arm (2) so that the bobbins (B1 and B2) can be mounted. In addition, a traverse box (4) is arranged on the machine base (20) so as to face the cradle arm (2), and a free roller (5) which rotates in contact with the bobbins (B1 and B2) includes a spindle (3). And the traverse box (4).

In the cradle type winder (1) as described above, when the spindle (3) reaches a certain number of revolutions, the reversing type thread hooking arm (6) is reversed to the bobbin side. At this time, the two yarns (Y) drawn by the suction device (not shown) are captured and grasped by the yarn grasping claws (7) provided at the tip of the spindle (3), and the cutter edge (near the cutter edge) It cuts into 8). The two yarns (Y) cut and gripped move to the bobbin side and wind around the bobbins (B1 and B2), and the bobbins (B1 and B2) having low tension
Move to the midpoint of 2) (the midpoint of the traverse). At this time, the yarn wound around the bobbin (B2) is the bobbin (B2).
In the transition to (4), a transition yarn (y) is formed between the bobbin (B1) and the bobbin (B2). In this way, the two yarns (Y) are captured and traversed by the respective traverse guides to form a yarn layer on each bobbin (B1 and B2).

The means for cutting the above-mentioned crossover yarn (y) includes:
As shown in the embodiment of FIG. 2B, a cutting means (1) having a guide groove (14) for a crossover thread and a cutting blade (15) at one end thereof.
0) is provided. And at the other end,
A fluid pressure cylinder (12) fixed to the machine base (9) via a mounting tool (13) is provided, and a cutting tool (10) passes through the holder (11) to the fluid pressure cylinder (12).
Is connected to the cylinder rod (16).

The crossover yarn cutting means (10) thus constructed is operated by the fluid pressure cylinder (12).
Two bobbins (B1 and B) for cutting the crossover thread (y) formed between the bobbin (B1) and the bobbin (B2).
2) Enter into the V-shaped space (S) formed on the mating surface. Then, the crossover thread (y) that rotates together with the bobbins (B1 and B2) approaches the guide groove (14) provided at the end of the cutting means (10) and is guided to the guide groove (10) and cut. The blade (15) is contacted and cut.

Needless to say, the crossover thread (y) can be cut by directly pressing the cutting blade against the bobbin without providing a space (S) where the mating surfaces of the two bobbins are V-shaped. Absent. However, the chamfering of the outside (edge) of the end face so that the mating surface is V-shaped when the two bobbins are matched is achieved by the cutting blade (1
0) is extremely easy to enter, and the crossover yarn (y) can be cut stably and reliably, which is preferable. Furthermore, the guide groove (1
It is preferable to provide 4) because the crossover yarn (y) can be reliably caught and cut without escaping from the cutting blade (14). The shape of such a guide groove may be any shape as long as it is a shape that is open to the entry side of the crossover yarn (y), but for example, a U-shaped, V-shaped guide groove or the like may be used. This is preferable because it facilitates the entry of the crossover yarn (y) into the guide groove (10).

In this way, when the crossover yarn (y) is cut, the fluid pressure cylinder 12) operates again to move the cutting means (10) from the space (S) formed by the V-shaped groove to the original position. After returning, the yarn is hooked on the winder and waits until the crossover yarn is formed.

The above-mentioned cutting of the jumper thread is possible if the jumper thread is formed and the bobbin is rotating. However, what should be done immediately after the transition yarn is formed when the yarn layer is slightly formed on the bobbin is that the operation of cutting the transition yarn is not hindered by the fully wound package, and the yarn waste scattered at the time of cutting. It is preferable because the yarn layer affected by the biting can be minimized.

Although the spindle type of the winding machine for driving the bobbin holder has been described above, the bobbin holder is not limited to the friction type of which the bobbin holder makes contact with the driving roller, and the cradle arm type is not limited to the same type. Is available for.

[0022]

As described above, according to the present invention, it is not necessary to provide extra elements such as a catch ring and a slit on the bobbin. In addition, since multiple yarns can be hooked together on the end of the spindle, it is easy to hook the yarn on the winder, and the success rate of yarn hooking due to damage to the catch ring is not reduced. Further, since it is possible to provide a method capable of easily and surely cutting the crossover thread, which conventionally relies on manual work, workability and productivity are improved. Therefore, equipment costs,
It has a remarkable effect that labor costs can be significantly reduced.

[Brief description of drawings]

1 is a schematic perspective view of an apparatus for carrying out the present invention.

FIG. 2A is an explanatory view of the operation of the present invention. (B) It is explanatory drawing which shows one Example of the cutting means of a crossover thread.

[Explanation of symbols]

 2 Cradle arm 3 Spindle 6 Thread hooking arm 7 Thread gripping claw 8 Cutter edge 9 Fluid pressure cylinder 10 Cutting means 12 Fluid pressure cylinder 14 Guide groove 15 Cutting blade y Crossover thread

Claims (3)

[Claims] 1. A plurality of yarns are collected and hooked by a yarn catching and cutting means provided on a bobbin holder of a winder, and then each yarn is transferred to a corresponding bobbin and wound while forming a crossover yarn. In the multi-cup winder, a crossing yarn cutting means is arranged in front of the mating surface between the bobbins,
After the time when the crossover yarn is formed on the bobbin, the crossover yarn cutting means is moved to the mating surface of the rotating bobbin to cut the crossover yarn continuous between the wound yarn bodies. How to cut the transition thread of a cup winder. 2. The method for cutting crossover yarns of a multi-cup winder according to claim 1, wherein the outer end surface of the bobbin is chamfered so that the mating surface between the bobbins forms a V shape. 3. The transition yarn of the multi-cup winder according to claim 1, wherein the transition yarn continuous between the wound yarn bodies is cut by a transition yarn cutting means provided with a guide groove for capturing the transition yarn at its tip end. Cutting method.