JPS5837998Y2 - Structure of cord connection part - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a structure in which the ends of a braided cord, such as a carrier cord for paper manufacturing, are connected to each other.

Conventionally, the method for connecting this type of cord is to insert the terminal ends of the cords to be connected into a hollow part from a position separated by a predetermined distance from the tip of the other cord, and then insert them in the direction of their origin for connection. method was adopted.

However, according to this method, since the cords have a double structure over a fairly long distance at the connecting portions of the cords, there is a drawback that the cords become thick in some parts.

Particularly when the cord is used by being connected to many pulleys, such as in the case of carrier cords for paper manufacturing or power transmission cords, only the connecting portions may be severely worn, and sometimes even fall off from the pulleys. It was happening.

In view of this situation, the present invention prevents an increase in the amount of yarn at the connecting portion by cutting out a portion of the yarn constituting the strand of the cord at the connecting portion, thereby making the thickness of the cord constant.

The present invention will be described below with reference to the drawings. At the end portions of the cords 1a and 1b to be connected, a portion of the yarn constituting each strand is cut out to form yarn cut portions 2a and 2b.
form.

As shown in FIG. 2, the tips of the yarn cut portions 2a and 2b are separated into yarns 3a and 3 by loosening the cord structure.
The tip of b is cut in several steps to give it a tapered shape.

Similarly, the boundaries 4 a and 4 b between the yarn cut portions 2 a and 2 b and the other portions may be cut at several different positions.

Then, the cord is connected to the yarn cut portions 2a and 2b using the above-mentioned known method.

That is, the tip of the yarn-cut portion 2a of one cord 1a is inserted from approximately the center of the yarn-cut portion 2b of the other cord 1b as shown by the arrow, and is inserted in the original direction. Yarn removal part 2
Similarly, the tip end of cord 1a is inserted from approximately the center of the yarn cut portion 2a of the one cord 1a, and the cord is inserted in the original direction to connect.

Then, the aforementioned tip portion is defined as a boundary 4a. In 4b,
If the yarn in that part is not to be cut into several different positions, the yarn should be inserted slightly into the uncut part, and if the yarn is to be cut into several different positions in several stages, the yarn should be cut so that it overlaps the boundaries 4a and 4b. It is designed so that it can be inserted.

The structure of the connecting part of the present invention connected in this way has a smaller amount of yarn in each of the cords la and lb in the connecting part than in the other parts, so even if the cords have a double structure, the overall yarn amount is small. The increase is small and the code does not become thick.

Therefore, the cord is less subject to wear, does not fall off the pulley, and has a uniform thickness and flexibility as a whole.

Furthermore, even though the yarn is cut to reduce the amount of yarn at the connection part, the tip is inserted to the part where the yarn cannot be cut or to the boundary mentioned above, so there is no decrease in tensile strength. It is possible to connect with strong power.

In the above-mentioned embodiment, the tip end was tapered, but it may be cut at right angles to the length direction.

In that case, at least at the boundaries 4 a and 4 b, it is better to cut the yarns to be cut at different positions so that the yarns do not become thicker.

By the way, in the present invention, the yarn cut portions 2a, 2b
It is preferable that 20 to 50% of the yarns constituting each strand be removed.

If the amount of yarn to be removed is less than 20%, the effect of making the thickness of the cord connection portion uniform is small.

If the amount of yarn to be removed is 20%, the cross-sectional area of the connecting portion will be approximately 1.6 times that of the other portion, and this level will be practically usable.

In addition, when the amount of yarn to be removed is 50%, the cross-sectional area of the connecting part is equal to that of the other parts, and not only is there no need to further reduce the cross-sectional area, but the tensile strength etc. are significantly reduced, which is preferable. do not have.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the terminal portion of the cord. FIG. 2 is a longitudinal sectional view showing the connecting portion of the cord. la, lb... code, 2a, 2b...
- Yarn removed portion, 3 a, 3 b... Yarn, 4 a, 4 b... Boundary between the yarn removed portion and other parts.

Claims (1)

[Scope of utility model registration request] Over a predetermined length of the end of the cord to be connected, 20 to 50% of the yarn constituting the slide of the cord is cut off, and the yarn at the tip is cut at several different positions, or Either cut the yarn to be cut at the boundary with the uncut part at several different positions, or cut the yarn at the tip and the boundary separately in the same manner as above to shape the part where the yarn is to be cut. , the yarn cut portions of each cord are alternated by about half the length,
It is characterized by being inserted into the hollow part of the cord from approximately the center of the yarn-cut part of the other cord toward the original direction, and the tip end is inserted slightly into the part of the yarn that is not cut out, or even to the boundary part. Structure of cord connection.