JPH073229U - Cable protection tube - Google Patents

Abstract

(57) [Summary] [Structure] Peak 12 and valley 14 continuous in the axial direction of the pipe.
The corrugated pipe having the above is cut in the pipe axial direction at one point in the circumferential direction, and a notch continuous in the pipe axial direction is formed at at least one other point while leaving the wall thickness of the valley portion 14. At the time of construction, open the cutting part and store the cable 26 in the cable protection tube 10,
A pressing ring 32 is attached to the outer surface of the cable protection tube 10 to prevent the cut portion from opening. [Effect] The workability can be improved because the overall weight can be reduced. Moreover, since the curvature can be adjusted arbitrarily, it is not necessary to prepare a plurality of cable protection tubes having different curvatures, and the cost can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable protection tube, and more particularly to a cable protection tube that protects a rising portion such as a power cable that is erected on a utility pole from a side groove on the side of a railroad track.

[0002]

[Prior art]

 This type of conventional cable protection tube includes a rectangular grooved main body made of an iron plate bent in the length direction with a predetermined curvature, and after housing the cable inside the main body, bolt the lid to the main body. I was trying to do it.

[0003]

[Problems to be solved by the device]

 Since the conventional cable protection tube is made of an iron plate, it has a heavy weight, and the main body and the lid have to be bolted together, which causes a problem of poor workability. In addition, since the bending degree of the rising part differs from site to site, the curve ratio of the cable protection tube is constant and cannot be adjusted.Therefore, it is necessary to prepare multiple cable protection tubes with different curvatures. The workability is deteriorated and the cost is increased.

Therefore, a main object of the present invention is to provide a cable protection tube that is inexpensive and can improve workability.

[0005]

[Means for Solving the Problems]

 This invention cuts the pipe wall of a corrugated pipe made of synthetic resin and having a mountain portion and a valley portion continuous in the pipe axial direction at one point in the circumferential direction in the pipe axial direction, and cuts it in other circumferential direction. It is a cable protection tube in which at least one point is formed with a notch continuous in the tube axis direction leaving the wall thickness of the valley portion.

[0006]

[Action]

 Since the corrugated pipe wall made of synthetic resin is cut in the pipe axial direction and the notches that continue in the pipe axial direction are formed with the wall thickness of the valleys left, it is left at the notched portion. The cut valley can be opened with the cut valley as an axis. At the time of construction, open the cut part to store the cable in the cable protection tube, and then attach a retaining ring to the outer surface of the cable protection tube to prevent the cut part from opening.

[0007]

[Effect of device]

 According to this invention, since the corrugated pipe made of synthetic resin is used, the weight can be reduced and the workability can be improved. Further, since the corrugated tube has flexibility, the curvature can be arbitrarily adjusted on site. Therefore, it is not necessary to prepare a plurality of cable protection tubes having different curvatures as in the conventional case, the workability can be further improved, and the cost can be reduced.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.

[0009]

【Example】

 2 and 3, the cable protection tube 10 of this embodiment includes a corrugated tube 16 made of a synthetic resin such as polyvinyl chloride. The corrugated pipe 16 includes a mountain portion 12 and a valley portion 14 which are continuous in the pipe axis direction, and the mountain portion 12 and the valley portion 14 ensure sufficient flexibility. The wall of the corrugated pipe 16 is cut at a cut surface 18 that passes through one point in the circumferential direction of the corrugated pipe 16 and extends in the pipe axial direction. On the opposite side of the cut surface 18, the wall thickness of the valley portion 14 is formed. A notch 20 is formed by cutting out the mountain portion 12 while leaving the mountain portion 12 continuous. Therefore, the cut portion (cut surface 18) of the corrugated tube 16 can be opened, for example, as shown in FIG. 4, with the valley portion 14 left in the portion where the notch 20 is formed as the axis.

Such a cable protection tube 10 has, for example, as shown in FIG. 1, a rising portion of a cable (power cable or the like) 26 that is raised from a side groove (U-shaped groove) 22 on the side of a line to a utility pole 24. Used to protect. At the time of construction, the cut portion (cut surface 18) of the corrugated pipe 16 is opened to store the cable 26 in the cable protection pipe 10 (FIG. 4), and the cable protection pipe 10 and the side groove 22 are connected via the adapter 28. Then, after adjusting the curvature according to the degree of bending of the rising portion, the cable protection tube 10 is fixed to the utility pole 24 by using the band 30 or the like. Then, in order to prevent the cut portion (cut surface 18) from opening, a substantially C-shaped pressing ring 32 as shown in FIG. 5 is attached to the outer surface of the cable protection tube 10. The pressing ring 32 is made of an elastic material such as a galvanized steel plate, and has an inner surface shape along the outer surface of the cable protection tube 10. In addition, the ring angle of the presser ring 32 is set to an angle (for example, 200 °) that is easily attached to the outer surface of the cable protection tube 10 and does not fall off.

Although the notch 20 is formed in the V shape in the above-described embodiment, the notch 20 may be formed in the U shape as shown in FIG. 6 or any other shape. Further, the position where the notch 20 is formed does not necessarily have to be on the opposite side of the cut surface 18, and may be formed, for example, at the position shown in FIG. The notches 20 may be formed at two points in the circumferential direction as shown in FIG. 8 or may be formed at three or more points.

Further, in the above-described embodiment, the corrugated pipe 16 formed by extending the peak portion 12 and the valley portion 14 continuous in the pipe axis direction in the circumferential direction is used, but as shown in FIG. 9, for example. Alternatively, a corrugated tube 34 or the like in which the peak 12 and the valley 14 are spirally formed may be used.

[Brief description of drawings]

FIG. 1 is an illustrative view showing a usage state of an embodiment of the present invention.

FIG. 2 is an illustrative view showing one embodiment of the present invention.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an illustrative view showing a state where a cable is inserted in the embodiment of FIG.

FIG. 5 is a perspective view showing a presser ring mounted in the embodiment of FIG.

FIG. 6 is an illustrative view showing a modification of the notch.

FIG. 7 is an illustrative view showing a state in which a notch forming position is changed in the embodiment of FIG.

FIG. 8 is an illustrative view showing a state in which notches are formed at two points in the circumferential direction in the embodiment of FIG.

FIG. 9 is an illustrative view showing a state in which a mountain portion and a valley portion are spirally formed in the embodiment of FIG.

[Explanation of symbols]

 10 ... Cable protection tube 12 ... Crest part 14 ... Valley part 16, 32 ... Corrugated tube 18 ... Cut surface 20 ... Notch 32 ... Presser ring

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Shigeru Sugiyama 1-6-5 Marunouchi, Chiyoda-ku, Tokyo Within East Japan Railway Company (72) Hiroshi Noguchi 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company (72) Inventor Minoru Saito 3- 1-3 Nihombashi Muromachi Chuo-ku, Tokyo Kubota Tokyo Head Office (72) Inventor Hiroaki Iruoka 64 Ishizu Kitamachi, Sakai City, Osaka Prefecture Co., Ltd. Kubota Vinyl Pipe Factory (72) Shinichi Tanikawa 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory, Inc. (72) Inventor Yukihiro Nishimura 64, Ishizukita Town, Sakai City, Osaka Kubota Vinyl Pipe Factory, Inc.

Claims (1)

[Scope of utility model registration request] 1. A pipe wall of a corrugated pipe made of synthetic resin and having peaks and valleys continuous in the pipe axial direction is cut in the pipe axial direction at one point in the circumferential direction, and at least another one in the circumferential direction. A cable protection tube in which notches that are continuous in the tube axis direction are formed at two points, leaving the wall thickness of the valley portion.