JP2988648B2 - Cable protection tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable protection tube, and more particularly to a cable protection tube for accommodating, for example, power and communication cables.

[0002]

2. Description of the Related Art Referring to FIG. 7, for example, a corrugated pipe is conventionally used as a cable protection pipe 4 for protecting a cable (power cable or the like) 3 from a manhole 1 to a building 2. And at the time of relocation of telephone pole 5 etc.
A new cable 6 is prepared while being passed through the cable protection tube 7, and the old cable 3 is switched to the new cable 6.

[0003]

In the prior art, the cable has to be switched when a utility pole or the like is relocated, so that there is a problem that power supply and communication are stopped during that time. SUMMARY OF THE INVENTION Therefore, a main object of the present invention is to provide a cable protection tube in which a utility pole or the like can be relocated without switching cables.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a cable protection tube made of a synthetic resin, wherein the first wave structure is formed on a tube wall so as to be continuous in the tube axis direction, and is continuous in a circumferential direction of the tube wall. A second wave structure formed so as to form the first wave and a split surface extending in one direction in the circumferential direction of the tube wall and extending in the tube axis direction.
The valleys of the structure are flat and continuous at a constant thickness over the entire length in the circumferential direction.
And the valley of the second wave structure extends over the entire length in the tube axis direction.
It is a cable protection tube that is flat and continuous at a constant thickness .

[0005]

The valley of the first wave structure continuous in the tube axis direction is circumferential.
This valley is flat and continuous over the entire length of
Cable protection by deforming the pipe wall at the
The protection tube can be bent in any direction. Also,
The valley of the second wave structure continuous in the direction extends over the entire length in the tube axis direction.
Is continuous at a constant thickness.
By deforming the tube wall, the split surface can be easily opened. At the time of construction, the split surface is opened to accommodate the existing power cable and the like in the cable protection tube, and the cable protection tube is bent and fixed to a utility pole or the like.

[0006]

According to the present invention, the cable protection tube is
Cables can be easily accommodated and cable protection tubes can be assigned.
Can be bent in any direction. Therefore, electric poles and the like can be easily relocated without switching cables. The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cable protection tube 10 of this embodiment shown in FIGS.
Wave structure 16 having a ridge and circumferentially continuous peaks 12
And a wave structure 20 having a valley 18. Wave structure 16
Since the peaks 12 are shared by the wave structure 20 and the wave structure 20, it is apparently recognized as a structure in which block-shaped protrusions (peaks 12) are formed at predetermined intervals in the axial direction and the circumferential direction. Ma
In addition, when focusing on the valley 14, the valley 1 of the wave structure 16 is obtained.
4 is flat and continuous at a constant thickness over the entire length in the circumferential direction.
First, the valleys 14 of the wave structure 20 are aligned over the entire length in the tube axis direction.
The valleys 14 extend in the pipe axis direction and
It is understood as a structure formed in a mesh shape in the circumferential direction.
Their to tube wall of the cable protection tube 10 is cut by the cut surface 22 through the circumferential direction of the one point of the cable protection tube 10 (central part of the mountain portion 12 in this embodiment), and extending axially . Na us, the cable protection tube 10, for example, be obtained by secondary processing of pipes formed by extrusion molding of a synthetic resin such as polyvinyl chloride.

As shown in FIG. 4, for example, a cable (power cable or the like) 28 from a manhole 24 to a building 26 and a cable protection tube 3 are provided.
It is used when the 0 and the utility pole 32 are relocated. In this case, an unnecessary portion (a portion indicated by a two-dot chain line) of the existing cable protection tube 30 is cut and removed, and after the exposed cable 28 is extended to the transfer location, the cable 2 is removed.
8 is covered with a cable protection tube 10. And the split surface 2
A cover 40 as shown in FIG. 5 is adhered so as to cover the split surface 22 in order to prevent the opening 2 (FIG. 3). After that, the cable protection tube 10 accommodating the cable 28 is fixed to the transferred electric pole 32 by using a fixture 34 such as a band. Existing cable protection tube 30 and cable protection tube 10
Is joined using, for example, a two-piece joint 36. A gap between the outer surfaces of the cable protection tubes 30 and 10 and the inner surface of the joint 36 is filled with a filling adhesive 38.

According to this embodiment, the valley 1 of the wave structure 20 is formed.
4 is flat and continuous at a constant thickness over the entire length in the pipe axis direction
Therefore, by deforming the tube wall at the valley portion 14,
Thus, the split surface 22 can be easily opened. Also, wave structure
The valley of the structure 16 is flat with a constant thickness over the entire length in the circumferential direction.
Since it is continuous, the tube wall is deformed at the valley portion 14
Thereby, the cable protection tube 10 is bent in an arbitrary direction.
Can be done. The existing cable 28 can be accommodated in the cable protection tube 10 by opening the split surface 22, so that the utility pole 32 and the like can be moved without switching the cable 28.

[0010] The cable protection tube 10 can be applied to, for example, repairing a damaged existing cable protection tube 30 as shown in FIG. In this case, the damaged portion of the existing cable protection tube 30 is cut and removed, and the cable protection tube 10 having substantially the same length as the cut length is disposed at that portion, so as to cover the split surface 22. FIG.
A cover 40 as shown in FIG. The joint between the existing cable protection tube 30 and the cable protection tube 10 is 2
It is joined using a split joint 36. In the gap between the outer surfaces of the cable protection tubes 30 and 10 and the inner surface of the joint 36,
The filling adhesive 38 is filled.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an axial sectional view of the embodiment of FIG. 1;

FIG. 3 is a radial sectional view of the embodiment of FIG. 1;

FIG. 4 is an illustrative view showing how to use the embodiment in FIG. 1;

FIG. 5 is a perspective view showing a cover for closing the split surface.

FIG. 6 is an illustrative view showing another method of using the embodiment in FIG. 1;

FIG. 7 is an illustrative view showing a conventional technique;

[Explanation of symbols]

 10, 30 ... cable protection tube 12 ... crests 14, 18 ... troughs 16, 20 ... wave structure 22 ... split surface 28 ... cable 32 ... utility pole 40 ... cover

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02G 9/00-9/12 H02G 3/00-3/04

Claims (1)

(57) [Claims] 1. A cable protection tube made of synthetic resin, comprising: a first corrugated structure formed on a tube wall so as to be continuous in a tube axis direction; and a first wave structure formed so as to be continuous in a circumferential direction of the tube wall. 2 wave structure, and provided with a circumferential split surface extending a point as and the tube axis direction of the tube wall, certain valleys of the first wave structure over the entire length of the circumferential
It is thick and continuous continuously, and the valley of the second wave structure is in front.
Flat and continuous at a constant thickness over the entire length in the axial direction of the pipe ,
Cable protection tube.