JPH0344779Y2 - - Google Patents

Description

[Detailed Description of the Invention] {Industrial Field of Application} The present invention involves fitting a ring to the end of the bobbin body, and connecting the end face of the bobbin body on the end side of the bobbin body and the end face of the ring opposite to the end face of the bobbin body. The present invention relates to a bobbin in which a thread is held in a gap formed between the bobbins.

{Prior Art} As a means for winding yarn around a bobbin in the silk spinning process, a method is widely used in which a gap is provided on the bobbin and the yarn is caught in the gap.

Conventionally, a blade cut formed by making a cut in the bobbin is often used to fill the gap on the bobbin.

The above-mentioned blade cut can easily have a structure that gradually decreases from the gap where the thread can enter to the gap where the thread can be gripped, so that the thread body can be captured very reliably.

{Problem that the invention aims to solve} However, as a contradictory effect to this effect, it is difficult to remove the yarn once it has been caught, and when reusing a bobbin with such a blade cut, it becomes extremely difficult to organize the yarn. In addition to being time-consuming, the yarn cannot be completely removed from the blade cut portion, resulting in a decrease in yarn catching ability, which significantly impedes the threading operation in the spinning process.

In addition, if the bobbin is repeatedly reused, the gap will widen or break each time the thread is removed, resulting in extremely poor catching performance, so the number of reuses will be limited to a few times, reducing costs by reusing the bobbin. The problem was that the effects could not be achieved.

The purpose of the present invention is to solve the above-mentioned conventional problems, and to provide a bobbin in which the structure of the gap on the bobbin is improved so that the trapped yarn can be easily removed. It is.

{Means for solving the problem} In order to achieve the above object, the present invention has the following configuration. That is, a ring is fitted to the end of the bobbin body, and the yarn is gripped in the gap formed between the end face of the bobbin body on the side of the end of the bobbin body and the end face of the ring opposite to the end face of the bobbin body. The bobbin is characterized in that the bobbin body and the ring are made of materials having different coefficients of thermal expansion.

The present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 is a cross-sectional view showing an example of a bobbin according to the present invention. FIG. 2 is a cross-sectional view of the ring forming the gap. FIGS. 3A and 3B are perspective views showing the processing state of the ring end face. Figure 4A,
B and C are cross-sectional views showing changes in the circumferential direction of the gap formed by the ring. As shown in FIG. 1, the bobbin body 1 on which yarn is wound to form a package is processed into a stepped shape with a small diameter portion at one end, and the small diameter portion preferably has a thermal expansion coefficient different from that of the bobbin body 1. Rings 2 made of materials that are 10 times or more different are fitted and fixed with appropriate interference at room temperature.

The ring 2 is attached to the bobbin body 1 as shown in FIG.
A slope 3 is formed on the end surface that is in contact with the end surface. As shown in FIG. 3B, this slope 3 is machined into a wedge shape 4 from the annular ring 2 shown in FIG. 3A. When the ring 2 is fitted onto the end face of the bobbin body 1 by the slope 3, the gap 5 in the circumferential direction is set to a finite value (Fig. 4 A) as shown in Fig. 4 A, B, and C. 0 (Figure 4C)
gradually decrease to

{Operation} Next, the operation of the present invention will be explained in the above embodiment.

When winding the yarn around the bobbin body 1 according to the present invention, the yarn is caught by being caught in the gap 5 formed by the bobbin body 1 and the ring 2. The gap 5 changes in width from a width that allows the thread to enter in the circumferential direction to a width that allows the thread to be pinched by the slope 3 of the ring end surface, thereby ensuring capture of the thread.

The remaining yarn trapped in the gap 5 in the bobbin body 1 can be removed by heating the bobbin body 1 from room temperature.
Alternatively, this can be carried out by temporarily making the inner diameter of the ring 2 larger than the outer diameter of the small diameter portion of the bobbin body 1 by cooling, and then removing the ring 2 from the bobbin body 1.

At this time, if the coefficient of thermal expansion of the bobbin body 1 is larger than that of the ring 2, it is sufficient to cool the bobbin body 1.
If the coefficient of thermal expansion of the bobbin body 1 is larger than that of the bobbin body 1, it may be heated.

There is a difference in thermal expansion coefficient between bobbin body 1 and ring 2.
If the amount is 10 times or more, it can be easily separated without creating an extreme temperature difference between the bobbin and the ring. In this case, decomposition is possible even if the temperatures between the bobbin body 1 and the ring 2 become almost the same due to heat transfer.

Since the bobbin body 1 and the ring 2 can be completely separated, the remaining thread can be completely removed, and the thread catching ability of the gap 5 formed when the ring and bobbin are recombined for reuse is not impaired. .

When aluminum is used for the bobbin body 1 and carbon fiber reinforced plastic is used for the ring 2, carbon fiber reinforced plastic can almost eliminate thermal expansion depending on the direction of the fibers, so the bobbin body 1
It can be easily decomposed by slightly cooling. Further, since carbon fiber reinforced plastic is lightweight and strong, it will not be deformed or destroyed by the centrifugal force applied when the bobbin is rotated at high speed.

However, the present invention is not limited to such a configuration, as long as the coefficients of thermal expansion of the bobbin and the ring differ, typically by a factor of two or more.

Moreover, the decomposition method may be performed not only by cooling but also by heating. For example, if the ring 2 is made of a conductive material and the bobbin body 1 is made of a non-conductive material and subjected to induction heating, only the ring 2 can be quickly and easily heated and disassembled.

Furthermore, although the extended end of the bobbin body 1 is made into a small diameter part and the ring 2 is fitted into the small diameter part, the inner peripheral part of the ring 2 is extended toward the bobbin body to make the extended part into a small diameter part. However, the bobbin may have a structure in which the inner diameter portion of the bobbin body corresponding to the extended small diameter portion of the ring 2 is formed in a stepped shape, and the ring 2 is fitted into the stepped portion of the bobbin body.

{Effects} As explained above, since the present invention has the above-described configuration and operation, it has the following effects.

(a) Since the ring that forms the gap between the ring and the bobbin body is made of a material with a different coefficient of thermal expansion than the bobbin body, it can be easily disassembled by cooling or heating, and the thread ends caught in the gap can be removed. Can be completely removed.

(b) Since the yarn end can be completely removed, the yarn catching ability is not impaired during reuse.

C. The bobbin can be used repeatedly because the thread catching property is not impaired during reuse.

When the slope is formed in the ni ring, a gap is formed that gradually decreases from a finite value to 0, so that the yarn can be captured reliably.

If carbon fiber-reinforced plastic is used for the holing, it can be easily disassembled by slightly cooling the bobbin body, and since it is lightweight and strong, centrifugal force can be applied even when the bobbin is rotated at high speed. It will not be destroyed or deformed by

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a bobbin according to the present invention. FIG. 2 is a cross-sectional view of the ring forming the gap. FIGS. 3A and 3B are perspective views showing the processing state of the ring end face. Figure 4A,
B and C are cross-sectional views showing changes in the circumferential direction of the gap formed by the ring. Explanation of symbols in the drawings 1: bobbin body, 2: ring, 3: slope, 4: processed part, 5: gap.

Claims (1)

[Claims for Utility Model Registration] (1) A ring is fitted to the end of the bobbin body, and a gap is formed between the end face of the bobbin body on the end side of the bobbin body and the end face of the ring opposite to the end face of the bobbin body. 1. A bobbin adapted to grip a yarn, wherein the bobbin body and the ring are made of materials having different coefficients of thermal expansion. (2) The bobbin according to claim 1, wherein the ring is made of carbon fiber-reinforced plastic.