JPH1113938A - Connecting structure of pipe for laying cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expose a through hole for cable inserting, a cut recessed groove, and a recessed line at the connecting part, so as to facilitate the insertion of a communication cable, a propelling work piping hose, and the like, and to solidify the connecting structure of neighboring pipes for laying cable, in the connecting structure of pipe for laying cable. SOLUTION: This connecting structure is composed by forming a socket 5 and a spigot 6 by cutting the outer peripheral walls of the ends of neighboring pipe for laying cable 1 opposing each other to the inner side of the radial direction than the position forming a penetration hole 4, and inserting and connecting the spigot 6 of the other side pipe for laying cable 1, in the front end of an inner collar 7 whose root part is installed and fixed to the outer periphery of the socket 5 of one side pipe for laying cable 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow pipe used for water supply and sewage or the like, in which a through hole for inserting a cable is formed, or an outer peripheral surface of the hollow pipe is used for inserting a cable. The present invention relates to a connection structure of a cable laying pipe formed by providing a cutout groove or a groove in the axial direction, and more particularly to a connection structure of a cable laying pipe used in an open-cutting method.

[0002]

2. Description of the Related Art Conventionally, as a pipe on which a communication cable of this type can be laid, a U-shaped groove including a box culvert is used, and a shelf or the like is provided in the U-shaped groove. There are known a large number of devices having a structure for accommodating a plurality of communication cables utilizing the above-described method.

[0003] For example, Japanese Patent Application Laid-Open No. 5-64331, Japanese Patent Application Laid-Open No. 1-133515,
As exemplified in Japanese Patent Publication No. 210183, an optical cable can be passed through a part of a thick wall portion of an eccentric hollow tube made of a power line supply tube or a fume tube used in a muddy water pressurized tube propulsion method. Techniques for providing through holes, grooves, holes into which sensors can be inserted, and the like have been developed.

[0004] Further, as a connecting structure of hollow tubes, as shown in Japanese Utility Model Laid-Open No. 1-84391, Japanese Utility Model Laid-Open No. 1-84392 or Japanese Patent Application Laid-Open No. 7-123574, adjacent concentric hollow tubes are used. A technique has been developed in which a collar is provided on the outer periphery of the connecting portion and the connecting portion is connected.

[0005]

However, in the above-mentioned prior art, a collar is applied to the outer periphery of a connecting portion between adjacent concentric hollow tubes, and an eccentric hollow tube is used as the hollow tube. Is used, it is difficult to connect the eccentric hollow tubes accurately while positioning them because no consideration is given to the connection structure of the adjacent portion of each eccentric hollow tube. In particular, the position of a through hole, a groove or a hole into which a sensor can be inserted provided in a thick wall portion of the eccentric hollow tube is accurately aligned, and an optical cable, a sensor, and the like are inserted into these through holes, a groove, or a hole. It is difficult to smoothly insert such a device.

The connecting structure of a cable laying pipe according to the present invention is a completely new technique developed in view of the above-mentioned conventional problems, and is provided on an outer peripheral wall of mutually facing ends of adjacent cable laying pipes. This is a structure for interconnecting cable laying tubes provided with through holes for cable insertion, notched concave grooves or concave streaks. In particular, the socket and the spigot are formed by cutting each end deeper inward in the radial direction than at the position where the above-described through hole, notched concave groove or groove is provided, thereby forming a through hole for cable insertion. It is another object of the present invention to provide a technique of exposing a cutout groove or a groove on the outside of the socket and the spigot to facilitate insertion of a communication cable.

Further, the spigot portion of the other cable laying tube in the distal end portion of the inner collar, the base of which is attached and fixed to the outer periphery of the socket portion of one of the cable laying tubes, is fitted and connected, so that adjacent ones are connected. It is an object of the present invention to provide a completely new technique in which a connection structure of a cable laying pipe is strengthened and a communication cable can be passed along the outside of the inner collar.

[0008]

The connecting structure of a cable laying pipe according to the present invention is a technique for fundamentally improving the above-mentioned conventional problems. A through hole for cable insertion is made in the wall in the axial direction,
Alternatively, a notch groove through which a cable can be inserted is formed in the outer peripheral wall of the hollow tube in the axial direction so as to pass therethrough, or a concave strip into which the cable can be inserted is formed in the outer peripheral surface of the outer wall of the hollow tube. In the connection structure of the cable laying pipes interconnecting the cable laying pipes formed or attached by passing in the directions, the outer peripheral walls of the mutually facing end portions of the respective cable laying pipes are the through holes, The socket portion and the spigot portion were cut off to the inside in the radial direction from the position where the notched concave groove or the concave streak was provided, and the original portion was fitted to the outer periphery of the socket portion of one of the cable laying tubes. A connection structure for a cable laying pipe, characterized in that a spigot portion of the other cable laying pipe is fitted and connected to a tip portion of the inner collar.

According to the configuration of the present invention described above, the outer peripheral walls of the opposing ends of the adjacent cable laying pipes have a diameter larger than the position where the through hole, the cutout groove or the concave streak is provided. Since the socket and the spigot are formed by cutting out to the inside in the direction, when these sockets and the spigot are connected by the inner case, the through hole for inserting the cable, the notch or the groove is formed on the outside thereof. The strip can be exposed, thereby facilitating insertion of the communication cable.

[0010] Further, since the socket portion and the spigot portion formed in the radial direction inside from the position of the through hole, the notch groove or the groove for inserting the cable are connected to each other by the inner collar, the adjacent cable The laying pipes can be firmly connected to each other and can be connected while maintaining high watertightness.

Further, since the positions of the through holes, notched concave grooves or concave streaks for inserting the cable are located radially outside of the corresponding socket portion and spigot portion connected by the inner collar as described above. The communication cable can be routed along the outside of the inner collar for interconnecting the socket part and the spigot part, etc., and the construction work can be extremely facilitated.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a first embodiment of a cable laying pipe connecting structure according to the present invention; FIG. FIG. 2 is an enlarged sectional explanatory view of a main part of FIG.

FIG. 3 is a cross-sectional explanatory view showing a second embodiment of the cable laying pipe connecting structure of the present invention, FIG. 4 is an enlarged cross-sectional explanatory view of a main part of FIG. 3, and FIG. FIG. 6 is an explanatory sectional view showing a third embodiment of the pipe connecting structure, and FIG. 6 is an enlarged explanatory sectional view of a main part of FIG.

The connecting structure of the cable laying pipe according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a cable laying pipe composed of an eccentric hollow pipe, in which water and And a peripheral wall 3 around the hollow hole 2 is formed of a thick wall portion 3a and a thin wall portion 3b.

In the axial direction in the thick wall portion 3a of the cable laying tube 1, three through holes 4 for cable insertion are formed in the axial direction in parallel at predetermined intervals. The thick wall portions 3a of the outer peripheral wall 3 at the ends of the adjacent cable laying pipes 1 facing each other are cut to the radial inside from the positions where the through holes 4 are provided, and the socket portions 5 and the spigot portions are cut off. 6 are formed.

The spigot portion 6 of the other cable laying tube 1 is fitted into the distal end portion of a steel inner collar 7 whose base is attached and fixed to the outer periphery of the socket portion 5 of one cable laying tube 1. ing. Therefore, the one cable laying tube 1 and the other cable laying tube 1 are firmly connected to each other through the inner collar 7 fitted in the socket portion 5 and the spigot portion 6.

A waterproof rubber 8 is attached to the inner surface of the distal end of the inner collar 7, and is tightly attached to the outer peripheral surface of the spigot portion 6 to maintain watertightness. In the above-described embodiment, the base of the inner collar 7 is attached and fixed to the outer periphery of the socket portion 5. However, like the T-shaped collar conventionally used (not shown), the inner portion of the inner collar 7 is fixed to the outer periphery of the socket 5. Only the base of the collar 7 may be fitted.

A communication cable 10 is inserted into a through hole 4 formed in the axial direction of the thick wall portion 3a of the cable laying tube 1. As described above, the socket portion 5 and the spigot portion 6 are provided radially inside the position where the through hole 4 provided in the thick wall portion 3a is provided, and the socket portion 5 and the spigot portion are provided. 6 has the inner collar 7 fitted therein, so that the communication cable 10
Are wired along the outside of the inner collar 7, as is particularly evident in FIG.

Reference numeral 11 denotes a flexible joint pipe material having an outer diameter capable of inserting both ends into through holes 4 formed in each of the adjacent cable laying pipes 1 and having inside thereof. Has an inside diameter through which the communication cable 10 can be inserted. In this embodiment, a flexible joint having a predetermined length is provided to prevent the communication cable 10 passing outside the inner collar 7 connecting the pair of cable laying tubes 1 from being exposed. Pipe material 11
Are inserted into the through holes 4 of the cable laying pipes 1 on both sides, respectively, and the communication cable 10 is inserted into the flexible joint pipe material 11.

Next, the connection structure of the cable laying pipe according to the second embodiment of the present invention will be described with reference to FIGS. 3 and 4. That is, reference numeral 21 denotes a cable laying tube formed of an eccentric hollow tube as in the first embodiment, and an outer peripheral wall 23 around the hollow hole 22 has a thick wall portion 23a.
And the thin portion 23b.

In the axial direction of the outer surface of the thick wall portion 23a of the cable laying pipe 21, three notched concave grooves 24 into which the communication cable 10 can be inserted in the axial direction are maintained at a predetermined interval. Drilled in parallel.

The thick wall portions 23a of the outer peripheral wall 23 at the ends of the adjacent cable laying pipes 21 facing each other are cut off radially inward from the positions where the cutout grooves 24 are provided, and the sockets are cut out. A part 25 and a spigot part 26 are formed.

The spigot portion 26 of the other cable laying tube 21 is fitted into the distal end portion of the steel inner collar 7 whose base is fixed to the outer periphery of the socket portion 25 of one cable laying tube 21. ing. Therefore, the one cable laying pipe 21 and the other cable laying pipe 21
These socket portions 25 and spigot portions 26 are firmly connected to each other via the inner collar 7 fitted therein.

According to the second embodiment of the present invention, as shown in FIGS. 3 and 4, a notched groove formed in the axial direction of the outer peripheral surface of the thick wall portion 23a of the cable laying tube 21. The communication cable 10 is inserted through 24. As described above, the socket portion 25 and the spigot portion 26 are provided radially inward of the position of the cutout groove 24 provided in the thick wall portion 23a. Since the inner collar 7 is fitted, the communication cable 10 inserted into the cutout groove 24 is particularly clear as shown in FIG.
It is wired along the outside of the inner collar 7.

The connection structure of the third embodiment of the cable laying pipe according to the present invention will be described below with reference to FIGS. That is, 31 is a cable laying pipe formed of a hollow pipe, and an outer peripheral wall 33 around the hollow hole 32.
Is formed by

In the axial direction of the outer surface of the outer peripheral wall 33 of the cable laying pipe 31, a concave streak 34 having a U-shaped concave groove 34a at a central portion into which the communication cable 10 can be inserted in the axial direction is predetermined. Are mounted so as to protrude from the outer surface of the outer peripheral wall 33 in parallel with each other at two intervals.

The outer peripheral wall 33 at the end of each adjacent cable laying pipe 31 opposing each other is cut radially inward from the position where the concave streak 34 is provided to form a socket 35
And a spigot portion 36 are formed.

The spigot portion 36 of the other cable laying tube 31 fits into the distal end portion of the steel inner collar 7 whose base is fixed to the outer periphery of the socket portion 35 of one cable laying tube 31. Have been. Therefore, the one cable laying pipe 31 and the other cable laying pipe 31 are firmly connected to each other via the inner collar 7 fitted into the socket part 35 and the spigot part 36.

In the case of the third embodiment of the present invention, as shown in FIGS. 5 and 6, a communication cable is inserted into a concave strip 34 protruding in the axial direction of the outer peripheral wall 33 of the cable laying pipe 31. 1
0 is inserted. As described above, the socket portion 35 is located radially inward of the position of the concave streak 34 provided on the outer peripheral wall 33.
And the spigot portion 36 are provided. Since the inner collar 7 is fitted to the socket portion 35 and the spigot portion 36, the communication cable 10 inserted through the concave streak 34 is
In particular, as is apparent from FIG. 6, the wiring is carried out along the outer side of the inner collar 7.

The cable laying tubes 1, 21 according to the present invention
Since the connecting structure of 31 is intended for construction for digging, unlike the connecting portion of the cable laying pipe for propulsion, there is no problem even if uneven portions are formed in these connecting portions.
It is not necessary to interpose a spacer or the like at the connecting portions of these cable laying tubes 1, 21 and 31, or to cover these connecting portions with an outer collar or the like.

When the cable laying pipes 21, 31 and the like are buried using the open-cutting method as in the present invention,
As described above, the outer peripheral wall 2 of the cable laying pipes 21, 31
There is no problem even if the communication cable 10 is left open while being inserted into the notched groove 24 provided on the outer surface of the third or 33 or the U-shaped groove 34a of the concave streak 34.

[0032]

As described above, the connecting structure of the cable laying pipe according to the present invention has the above-described structure and operation, and therefore has the following great effects.

The outer peripheral walls of the opposing ends of the adjacent cable laying pipes are cut off radially inward from the positions where the through holes, notched concave grooves or concave streaks are provided for inserting the cable, and the socket portion and the spigot are cut off. The formation of the portion exposes the cutout groove or notch of the through hole for inserting the cable, thereby facilitating the insertion of the communication cable.

Further, the spigot portion of the other cable laying pipe is fitted and connected to the distal end of the inner collar, the base of which is fitted on the outer periphery of the socket part of one cable laying pipe, so that adjacent ones are connected. The connection structure of the cable laying pipes can be strengthened, and the watertightness of the water passage of the hollow pipe and the cable insertion passage provided in the outer peripheral wall portion of the hollow pipe can be improved by being connected in a watertight manner by the inner collar. Therefore, the position of the through hole, the cutout groove or the groove formed in the cable laying pipe can be accurately matched.

In particular, when a notched groove or groove is provided on the outer peripheral wall of the cable laying pipe, the communication cable can be inserted into the groove from the outside as it is over its entire length.

In the construction method used in the present invention, the cable laying pipe is buried in the ground by using an open-cutting method, so that an uneven portion is formed at a connection portion of these cable laying pipes, or communication is performed. There is no problem even if the notched concave groove or the concave streak into which the cable is inserted is opened as it is, and it has features such as extremely easy construction.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a first embodiment of a connection structure for a cable laying pipe according to the present invention.

FIG. 2 is an enlarged sectional explanatory view of a main part of FIG. 1;

FIG. 3 is an explanatory sectional view showing a second embodiment of the connecting structure of the cable laying pipe according to the present invention.

FIG. 4 is an enlarged sectional explanatory view of a main part of FIG. 3;

FIG. 5 is an explanatory sectional view showing a third embodiment of the cable laying pipe connection structure of the present invention.

FIG. 6 is an enlarged sectional explanatory view of a main part of FIG. 5;

[Explanation of symbols]

 1,21,31 Cable laying pipe 2,22,32 Hollow hole 3,23,33 Outer wall 3a, 23a Thick wall 3b, 23b Thin wall 4 Through hole 5,25,35 Socket 6,26, 36 Spigot part 7 Inner collar 8 Waterproof rubber 9 Action material 10 Communication cable 11 Flexible pipe joint material 24 Notch groove 34 Recess 34a U-shaped groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Akira Nobunaga, Inventor 1-22-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Inside Haneda Hume Tube Co., Ltd. (72) Kuniyuki Ichikawa 1-22 Nishi-Shinjuku, Shinjuku-ku, Tokyo No. 2 Haneda Hume Tube Co., Ltd.

Claims (1)

[Claims] A through hole for inserting a cable is formed in an outer peripheral wall of a hollow tube in an axial direction, or a notched groove for inserting a cable in an outer peripheral surface of an outer peripheral wall of the hollow tube is formed in an axial direction. For laying a cable through which cable laying pipes are formed by drilling through the pipe or by attaching axially a concave strip into which the cable can be inserted into the outer peripheral surface of the outer peripheral wall of the hollow pipe. In the pipe connection structure, the outer peripheral walls of the mutually facing ends of the respective cable laying pipes are cut to a radially inner side from the positions where the through holes, the notched concave grooves or the concave strips are provided, and the sockets are cut out. And a spigot portion are formed, and the spigot portion of the other cable laying pipe is fitted and connected into the tip of the inner collar having the base part fitted on the outer periphery of the socket portion of one cable laying pipe. For cable laying characterized by Consolidated structure of.