JPH04114590U - tow rope - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a light and durable tow rope that prevents slippage between the core and the polyester fiber layer during towing. [Structure] The core 1 and the polyester fiber layers 2 and 2' are sewn together in the length direction with a polyester thread 3.

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 polyester fiber bundle is covered with two outer layers 2, 2' made of polyester fibers. , polyester fiber is used in contrast to aramid fiber, which has high tensile strength but poor weather resistance against exposure to light. Weather resistant, thin, light, flexible, and has high tensile strength. It is assumed that there is.

[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' become loose and smooth traction is not possible, and the looseness becomes large, braid the 4. The outer layers 2, 2' may be damaged. Therefore, this part of the core 1 is exposed to light. It may deteriorate and the traction strength may rapidly decrease, leading 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, A lightweight, durable towing rope with high tensile strength that prevents the breakage of conventional towing ropes. The goal is to provide

[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 layers are sewn together lengthwise with polyester thread.

0010

[Effect]

A tow rope constructed in this way has a core and a polyester layer that slip when being towed. Because it is pulled as one piece without shifting, there is no need to put undue tension on the polyester layer. I can't.

[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. Using a sewing machine, sew the polyester thread 3 crosswise in the length direction. being stopped.

[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 and 2' of rope A are sewn together and secured. Therefore, the braids 4 do not slip and shift, and they are pulled together as one. Therefore, it can be towed without applying undue tension to the outer layers 2, 2'. Therefore outer layer 2 , 2', and the core 1 does not break due to exposure.

[0015]

【effect】

This idea is constructed as described above, so the core of the aramid fiber bundle and the polyester The fiber layer does not shift. This makes the tow rope less likely to break, making it strong and thin. It is possible to provide a weather-resistant towing rope that is lightweight, has high usable strength, and is lightweight.

[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 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, characterized in that the core and the polyester fiber layer are sewn longitudinally with polyester thread. rope.