JPS6230427Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cable fall prevention/holding fitting for preventing cables installed in tunnels, manholes, etc. from falling off from cable receiving fittings.

In the conventional binding means, as shown in Fig. 1 A and B, the cable 1 and the cable receiver 2 are tied together with the tie string 3, so that vibrations, earthquakes, etc. can cause the cable receiver to move in the direction P of the cable receiver and become loose. In addition, when adding cables, the work of tying and untying them is poor, and since they are cut to the required length, they cannot be tied to the specified length, making it impossible to reuse them. This is the current situation.

Furthermore, when this method is applied to an optical fiber cable, there is a drawback that forces such as shearing or lateral pressure are applied, which may cause breakage of the optical fiber and deterioration of optical transmission characteristics.

In order to eliminate the drawbacks of the prior art, the present invention curves an elastic metal strip to form a U-shaped hardware body in the center, and the free ends of the hardware body are opposite to each other at right angles to the surface of the hardware body. Horizontal parts of approximately the same length are bent in the same direction, and one horizontal part has a hook part that is slightly angled with respect to the horizontal part below the tip, and a hook part that is slightly straight below the tip of the other horizontal part. A cushioning material comprising a flange having a hook part parallel to the hook part, a cable contact part having unevenness on one side, and a fitting part having a slit on the other side into which a metal body having a circular cross section is inserted. The purpose of this cable is to hold the cable in the receiving part, to prevent the cable from falling off, to facilitate attachment and detachment, and to improve workability. This is to prevent lateral pressure from being applied to the cable even during large earthquake vibrations.

The cable fall prevention/holding hardware (hereinafter referred to as hardware) of the present invention will be explained based on the drawings.

FIG. 2 shows a side view, FIG. 3 shows a front view, and FIG. 4 shows a plan view.

The hardware of the present invention is constructed by curved metal filaments, and the overall shape is Ω-shaped, with a U-shaped hardware body 4 in the center and a surface of the hardware body 4 at the free end of the hardware body 4. On the other hand, horizontal parts 5 and 6 are provided which are bent at right angles to the hardware main body 4 in mutually opposite directions, and parts extending vertically downward are provided in the horizontal parts 5 and 6, and hook parts 7 and 8 are attached to the ends of the horizontal parts 5 and 6. , 6 so that they are parallel to each other at a slight angle. As shown in FIG. 3, the length L of the hook portion 8 of one horizontal portion 6
is provided with a straight portion 6-1 which is longer by N than the length M of the hook portion 7 of the other horizontal portion 6. The hook parts 7 and 8 are structured so as to grip both sides of the cable receiver 2.

To attach the hardware of the present invention to the cable receiver 2, first engage the hook 7 as shown in FIG. The hook portion 8 is located above the cable receiver 2. Therefore, the horizontal part 6 is lowered by utilizing the elasticity of the hardware body 4, and the hook part 8 is engaged with and attached to the cable receiving hardware 2. This is shown in FIG. 2 by a two-dot chain line.

In the above case, the hook parts 7, 8 and the horizontal part 5 correspond to the point of action, the point of force, and the fulcrum of the lever. Due to the moment generated in the above state, the hook 7,
A large bearing force is induced in the horizontal part 5 in the thickness direction of the cable receiver 2, and the frictional force makes it possible to maintain the mounting and position constant.

To remove the hardware of the present invention from the state where it is attached to the cable receiver 2, as shown in Figure 3, there is a gap N between the horizontal part 6 and the cable receiver 2, so push down the hardware body 4 and remove the hook. 8 and cable receiver 2
Since the metal fitting of the present invention can be disengaged from the cable receiving metal fitting 2, it can be easily removed from the cable receiving metal fitting 2.

The hardware of this invention is cable holder 2 and cable 1.
The cable 1 is held within the hardware main body 4 of the hardware.

In addition, since there is a gap between the hardware body 4 and the cable 1, the cable 1 can move freely even in the case of small vibrations of the cable receiving part 2, and no extra lateral pressure is applied. However, in the case of large vibrations such as an earthquake, the cable 1 It collides with the hardware body 4 and applies a large lateral pressure to the cable 1. In order to absorb such lateral pressure, the cable 1 can be protected by constructing a cable fall prevention fitting by covering the entire length of the hardware body 4 with a cushioning material 9 made of synthetic resin or the like having a cross-sectional shape as shown in FIG. be able to.

The cushioning material 9 has a length that covers the entire length of the hardware body, and FIG. 5 shows a cross-sectional view of the cushioning material 9.
9-1 is the flange part, 9-2 is the fitting part of the hardware body, 9-3
9 is a cable contact portion, 9-4 is a slit, and 9-5 is an arm piece.

The cushioning material 9 has a collar portion 9-1 having a cable contact portion 9-3 having an uneven groove on one side, and a metal body insertion portion 9- having a circular cross section with a slit 9-4 sandwiched on the other side.
Two arm pieces 9- curved to form 2
5 and 9-5 are integrally molded. This cushioning material 9 is coated on the metal body 4 through the slit 9-4 so that the cable contact portion 9-3 faces the inside, that is, the cable insertion side. Since the cushioning material 9 has the cable contact portion 9-3 having a larger contact area with the cable than the hardware body 4, it reduces the lateral pressure applied to the cable and prevents damage to the cable jacket. It has an effect.

Even if a plurality of cables are placed on the cable receiver 2, if a cable fall prevention fitting is attached to the outermost cable, it is not necessary for the inner cable.

The metal fittings of the present invention can be prepared in various sizes depending on the size of the cable. FIG. 6 shows a case in which the present invention is applied to supporting metal fittings such as pipes.

A shows the case where the pipes are supported on a cable holder, B shows the case where the pipes are hung from the ceiling, and C shows the case where the pipes are installed on the side wall.

Since the metal fitting of the present invention has the above-described configuration, when it is attached to a cable receiving metal fitting, there is no loosening due to the taper of the cable receiving metal fitting, which improves the attachment/detachment work and prevents the cable from falling off. It can be reused, it can be installed without applying lateral pressure to the cable, and since it is covered with a cushioning material, it can absorb lateral pressure even during large vibrations such as earthquakes, making it ideal for optical fiber cables that dislike lateral pressure. produce an effect.

Note that it can also be used as a support fitting for pipes, etc.

[Brief explanation of the drawing]

Figure 1 shows a conventional means of tying a cable to a cable receiver using a tying string, A and B show a plan view and a side view showing the procedure, and Figure 2 is a side view of the inventive fitting before and after it is attached to the cable receiver. , Figures 3 and 4 are front views and plan views of the hardware of the present invention, Figure 5 is a sectional view of the cushioning material covering the body of the hardware of the present invention, and Figures 6 A, B, and C are the main views of the hardware of the present invention. An example of the application of the invented hardware is shown. 1: Cable, 2: Cable holder, 4: Hardware body, 5, 6: Horizontal part, 7, 8: Hook part, 9:
Buffer material.

Claims (1)

[Scope of utility model registration request] A U-shaped metal body is formed by bending an elastic metal filament body, and horizontal portions of approximately the same length are bent at the free end of the metal body in mutually opposite directions at right angles to the surface of the metal body. A hook section is provided in a curved manner, and one horizontal section has a hook section that is slightly angled with respect to the horizontal section below the tip, and a slightly straight section is provided below the tip of the other horizontal section that is parallel to the hook section. established a department,
A cushioning material consisting of a cable contact part having an uneven surface on one side and a flange part having a fitting part into which a metal body having a circular cross section and a slit on the other side is fitted is fitted and covered with the metal body at the fitting part. Cable drop prevention and holding metal fittings.