JPH04114591U - tow rope - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a safe and durable tow rope that can indicate its lifespan. [Structure] A core 1 and polyester fiber layers 2, 2' are sewn together in the longitudinal direction with a colored thread 3 having a color different from that of the polyester fiber layers 2, 2'.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a traction rod for electric wires and cables with high tension, wear resistance, and flexibility. Regarding the group.

0002

[Conventional technology]

Conventionally, when laying cables (for example, for power, communication, etc.) between utility poles or within conduits. For traction, steel wire (hereinafter referred to as wire), polyester or nylon (polyamide) is used. Fiber ropes such as fiber ropes were used.

0003 However, because the above wires are heavy and rigid, they are difficult to handle during installation, and However, there was a problem in that it was difficult to pass through the pipe.

0004 On the other hand, fiber ropes such as polyester or nylon have excellent flexibility and Although it has the feature of being lightweight, it is less strong than wire and tends to stretch or break when laid. There was a problem of disconnection.

[0005] For this reason, instead of synthetic fiber ropes and wires such as polyester and nylon, Aramid (aromatic polyamide) has characteristics such as light weight, high strength, high modulus, and low elongation. Traction ropes using fibers have come into use.

[0006] This towing rope is, for example, similar to that shown in FIG. A core 1 made of a fiber bundle is covered with two outer layers 2, 2' made of polyester fibers. It is something that In this way, this tow rope A has high tensile strength, but it is difficult to withstand weather such as exposure to light. As a result of adding the weather resistance of polyester fiber to aramid fiber, which has inferior properties, it has increased flexibility. It is thin, light, and has high tensile strength and excellent weather resistance. .

[0007]

[Problem that the idea aims to solve]

However, with the above structure, it is difficult to tow with an endless chain pressure traction machine with shoes. Then, as shown in Figure 1, the outer layers 2 and 2' and the core 1 and the outer layers 2 and 2' slip, causing the braid to 4. If the outer layers 2 and 2' sag and smooth traction is not possible, and the sag becomes large, the There is a risk that the set 4, outer layers 2, 2' may be damaged. Therefore, this part of core 1 is not exposed to light. This can lead to a rapid decline in traction strength and lead to breakage.

[0008] Therefore, the challenge of this invention was to eliminate the slippage caused by slippage between the core and each layer during traction, Allowing you to see a break before the tow rope causes a break, compared to traditional tow ropes A tow rope with high tensile strength that is safe, lightweight, and durable, preventing accidents from breaking. The goal is to provide the following.

[0009]

[Means to solve the problem]

In order to solve the above problems, polyester fibers are placed on a core made of aramid fiber bundles. In a traction rope with a fiber layer, a core of aramid fiber bundle and polyester fiber The fiber layer is sewn in the length direction with a colored thread different from the color of the fiber layer. Ru.

0010

[Effect]

A tow rope constructed in this way has a core and a polyester layer that slip when being towed. It is pulled together as one without shifting. Then, when passed through the conduit, a polyester fiber layer At the same time, the colored thread comes into contact with the inner surface of the pipe, and as it is used, the colored thread is worn out. This wear As time goes by, the colored thread loses its color and eventually breaks. This color is due to baldness and thread breakage. Determine the lifespan of the tow rope. At this time, the color of the colored yarn and polyester fiber layer should be different. This makes it easy to spot discoloration and broken threads.

[0011]

【Example】

As shown in FIG. 1, the traction rope A of this embodiment has a core 1 and two outer layers 2 covering the core 1. , 2', i.e. the inner first polyester layer 2 in contact with the core 1 and the outer sheath. It consists of the same second layer 2'.

0012 Core 1 is made of 1,500 denier 6-strand aramid fiber with 8 strokes and 144,000 denier. It is an aramid fiber bundle with four cores of Neil braid. On the other hand, the first polyester layer 2 has five 1000 denier polyester threads. Made of 8 strands of 5000 denier polyester thread and 4 braids. . Similarly, the second polyester layer 2' is made of 5 1000 denier polyester threads. Made of 5000 denier polyester thread with 16 stitches and 4 braids. be. In this way, the rope A of this embodiment, which is assembled with the braid 4, is flexible and has a tendency to twist. Does not cause kinks like

[0013] In addition, the core 1 and the outer layers 2, 2' are arranged at a distance of 3 mm from the end of the rope A, as shown in the same figure. In the longitudinal direction, cross the outer layer 2, 2' with a polyester colored thread 3 of a different color. A sewing machine is used to make marks, stitch them together, and hold them together.

[0014] In this example, the rope A configured as described above is extended and shunted with a span of 30 m. The chain is clamped by an endless chain pressure traction machine with a did. At this time, the core 1 and outer layers 2, 2' of the rope A are sewn together with the colored thread 3. Because they are stopped, the braids 4 do not slip and shift, and the two are integrated. Therefore, the outer layers 2, 2' can be towed without applying undue tension to them. Towing rope A, which has been pulled several times in this way, becomes damaged due to friction with the inner wall of the pipe, etc. When the outer layers 2 and 2' become worn and thin, the colored thread 3 will also become discolored and break. The sign indicates the wear condition of the outer layer 2, 2' before the outer layer 2, 2' transmits external light. Ru. For this reason, workers must inspect the tow rope A for discoloration and broken threads before towing it. If you check and find these, it will be determined that the service life has been reached and the tow rope A will be replaced. do.

[0015] At this time, since the colored thread 3 is of a different color from the outer layers 2 and 2', thread breakage can be easily avoided. You can find it easily.

[0016]

【effect】

This idea is constructed as described above, so the core of the aramid fiber bundle and the polyester Eliminates misalignment with the fiber layer, and also prevents colored thread from peeling off or thread breakage. It is also possible to display the lifespan of the

[0017] Also, at this time, the colored thread was a different color from the polyester fiber layer, so the color was You can easily find broken threads.

[0018] Therefore, the rope can be replaced before the towing rope breaks, and the rope can be replaced before it breaks during towing. We provide weather-resistant tow ropes that are safe, have high usability, and can prevent accidents. can.

[Brief explanation of drawings]

[Fig. 1] Perspective view of the embodiment

[Explanation of symbols]

1 core (aramid fiber bundle) 2, 2’ polyester fiber layer 3 Colored thread (polyester thread) 4 Braid A Tow rope

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Seiji Hino Tatsuta Den, 2-3-1 Iwatacho, Higashiosaka City Within Line Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A traction rope comprising a polyester fiber layer on a core made of an aramid fiber bundle, the core and the polyester fiber layer being sewn in the length direction with a colored thread different from the color of the fiber layer. A tow rope characterized by: