JPH112370A - Cable laying pipe, and its connecting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a communicating cable into a sheath pipe precisely and easily with providing a laying pipe with low weight and enough strength, by previously laying the sheath pipe axially of a thick wall part of a deflection hollow pipe. SOLUTION: A deflection hollow pipe 1 has a hollow hole 2 through which waterworks, sewer, or others flow, and an outer peripheral wall 3 around the hollow hole 2 consists of a thick wall part 3a and a thin wall part 3b. Cable insertion sheath pipes 4 are laid in parallel with a given interval axially of a thick wall part 3a of a deflection hollow pipe 1. A communicating cable 5 is inserted into a sheath pipe 4. A full length sheath pipe 4 assembly is provided by connecting an engaging hole which has inner diameter same as outer diameter of the sheath pipe 4 with the end of the sheath pipe 4 at a socket 6 and a spigot 7 of the deflection hollow pipe 1. Therefore, strength of the outer wall can be improved, and the communicating cable 5 is inserted smoothly and stably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying pipe in which a sheath pipe for inserting a cable can be previously buried in a part of an eccentric hollow pipe used for water supply and sewerage and the like, and a connection structure of the pipe. In particular, a cable laying pipe formed by previously burying a sheath pipe integrally in the axial direction in a thick wall portion of the eccentric hollow pipe, and a collar while aligning these cable laying pipes with each other. The present invention relates to a connection structure capable of connecting accurately and firmly using a pipe joint material.

[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] Further, as exemplified in, for example, JP-A-5-64331, JP-A-1-133515, or JP-A-4-210183, it is used for a power line supply pipe or a muddy water pressurized pipe propulsion method. A technique has been developed in which a part of a thick wall portion of an eccentric hollow tube formed of a fume tube or the like is provided with a through hole or a groove through which an optical cable can pass, a hole into which a sensor can be inserted, and the like.

[0004]

However, in the above-mentioned prior art, it is necessary to simply insert a through hole, a groove or a sensor through which a cable can be passed through a thick wall portion of the eccentric hollow tube. It only has holes that can be made, and there is a problem in the strength of the entire eccentric hollow tube, etc., and it is difficult to drill through holes etc. in the axial direction of the thick wall portion of the eccentric hollow tube. There was a problem with mass production.

Furthermore, in these known techniques, no consideration is given to the connection structure of each adjacent portion of each eccentric hollow tube, so that each eccentric hollow tube is accurately aligned while being positioned. There was a problem that it was difficult to connect. In particular, accurately align the position of the through hole, groove or hole in which the sensor can be inserted, provided in the thick wall portion of the eccentric hollow tube,
There is also a problem that it is difficult to smoothly insert an optical cable, a sensor or the like into these through holes, grooves or holes.

The cable laying pipe and the connecting structure of the pipe according to the present invention are a completely new technique developed in view of the above-mentioned conventional problems, and particularly the axial direction of the thick wall portion of the eccentric hollow pipe. By burying the sheath pipe in advance, the strength of the cable laying pipe can be sufficiently provided while reducing the weight, and the communication cable can be accurately and easily inserted into the sheath pipe buried in the cable laying pipe. It is intended to provide a technology that can be used.

Further, when manufacturing a cable laying tube by using a centrifugal molding method, the thickness of the eccentric hollow tube is set by setting a sheath pipe in a mold frame in advance through a jig or the like. While accurately burying the sheath pipe in the meat wall,
It also provides technologies that enable mass production.

Further, by using the collar and the pipe joint material together, the cable laying tube, the socket portion and the spigot portion are connected to each other while maintaining a strong and high watertightness. It is an object of the present invention to provide a completely new technique capable of accurately matching the position of a sheath pipe embedded in a service pipe.

[0009]

The cable laying pipe according to the present invention is a technique for fundamentally improving the above-mentioned conventional problems, and the gist of the present invention is that the thick wall of the eccentric hollow pipe is provided. The cable laying pipe is characterized in that a sheath pipe for cable insertion is integrally buried in advance in the axial direction.

[0010] According to the configuration of the present invention, since the sheath pipe for insertion of a cable, a hose or the like is buried in advance in the thick wall portion of the eccentric hollow tube, the eccentricity is reduced while reducing the weight. The strength of the hollow pipe can be sufficiently maintained, and the insertion of a communication cable, a propulsion work piping hose, and the like into the sheath pipe can be facilitated.

[0011] The pipe connecting structure according to the present invention is also a technique for fundamentally improving the above-mentioned conventional problems. The gist of the present invention is that a cable for inserting a cable into a thick wall portion of the eccentric hollow pipe is provided. In a connection structure for interconnecting cable laying pipes in which a sheath pipe is embedded, a cable laying pipe is provided with a cable laying pipe having a base portion attached and fixed to the outer periphery of a socket section of one of the cable laying pipes. The spigot portion of the pipe is fitted, and both ends of the pipe joint material are fitted into fitting holes provided continuously at the socket portion of the cable laying tube and at the end of the sheath pipe embedded in the spigot portion. It is a connection structure of a cable laying pipe characterized in that it is configured as described above.

In the above-described structure of the present invention, as described above, since the socket portion and the spigot portion of the cable laying tube are connected by the collars, respectively, the strength is stable and the stop is provided. Aqueous connections are possible.

Further, in the above-mentioned structure of the invention, since the socket and spigot are provided with the fitting holes connected to the ends of the sheath pipes respectively buried, the fitting of the spigot is provided. And the fitting holes of the socket part can be communicated with each other by aligning them with each other, and by fitting both ends of the pipe joint material into these fitting holes, both fitting holes can be inserted through the pipe joint material. Can be interconnected.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing one embodiment of a cable laying pipe and a connecting structure of the pipe according to the present invention. FIG. 1 shows a cable laying pipe and a connecting structure thereof according to the present invention. FIG. 2A is a longitudinal sectional view and a transverse sectional view showing
FIG. 2B is an enlarged longitudinal sectional view showing a main part of the connection structure of FIG. 1 and the connection structure.

Referring to FIGS. 1 and 2, a cable laying pipe and a connecting structure thereof according to the present invention will be described. Reference numeral 1 denotes an eccentric hollow pipe having a hollow hole 2 through which water and water can flow down.
And an outer peripheral wall 3 around the hollow hole 2 is formed by a thick wall portion 3a and a thin wall portion 3b.

In the axial direction of the thick wall portion 3a of the eccentric hollow tube 1, three sheath pipes 4 for cable insertion are buried in parallel in the axial direction at predetermined intervals. A communication cable 5 is inserted through these three sheath pipes 4. The entire length of the sheath pipe 4 is shorter than the entire length of the eccentric hollow tube 1, and the socket portion 6 and the spigot portion 7 of the eccentric hollow tube 1 each have an inner diameter substantially equal to the outer diameter of the sheath pipe 4. A fitting hole 8 is provided to connect to the end of the sheath pipe 4.

Reference numeral 9 denotes a pipe joint material having an outer diameter capable of fitting both ends thereof into the fitting holes 8 formed in the socket portion 6 and the spigot portion 7 as described above, and an inner portion thereof. Has an inner diameter through which the communication cable 5 can be inserted.

Reference numeral 10 denotes a steel collar, the base of which is fixedly mounted on the outer periphery of the socket 6 of one eccentric hollow tube 1, and the other eccentric hollow is attached to the tip of the steel collar 10. The spigot portion 7 of the tube 1 is fitted, and the socket portion 6 and the spigot portion 7 are connected to each other via a steel collar 10. A waterproof rubber 11 is attached to the inner surface of the distal end of the steel collar 10 so that the spigot 7
In close contact with the outer peripheral surface of the Further, a cushion member 12 is interposed between the end surfaces of the socket portion 6 and the spigot portion 7.

Since the cable laying pipe according to the present invention uses the eccentric hollow pipe 1 as described above, the outer peripheral wall 3 can be provided with a strong and durable thick wall section 3a.
Further, a plurality of sheath pipes 4 can be buried in the axial direction in the thick wall portion 3a in a stable state in advance.

As described above, in the present invention, by embedding the sheath pipe 4 integrally with the thick wall portion 3a, the outer wall strength of this portion can be increased, and
The communication cable 5 can be smoothly inserted into the sheath pipe 4 in a stable state.

In embedding the sheath pipe 4 in the eccentric hollow tube 1 in advance, the sheath pipe 4 is disposed via a jig in a molding die (centrifugal molding die) for molding the eccentric hollow tube 1. By doing so, the eccentric hollow tube 1 and the sheath pipe 4 can be easily and integrally formed. When forming the fitting holes 8 connected to the ends of the sheath pipes 4 in the socket portion 6 and the spigot portion 7, respectively, the outer shape of the jig supporting the sheath pipe 4 is made equal to the inner diameter of the fitting holes 8. By inserting the eccentric hollow tube 1 after forming it, the fitting hole 8 can be easily formed.

In the connecting structure according to the present invention, since the socket portion 6 and the spigot portion 7 are connected by using the steel collar 10, the connecting portion is strengthened, and the connecting portion having a high waterproof property is provided. Can be configured.

Further, in the connection structure according to the present invention,
As described above, the fitting holes 8 connected to the sheath pipe 4 respectively provided in the socket portion 6 and the spigot portion 7 are matched with each other, and both ends of the pipe joint material 9 are fitted into the fitting holes 8 respectively. Since the adjacent fitting holes 8 are connected to each other via the pipe joint material 9, the connection between the socket portion 6 and the spigot portion 7 can be further strengthened.

Further, the fitting holes 8 of the socket portion 6 and the spigot portion 7 are connected to each other by a pipe joint material 9 so that the sheath pipes 4 of the adjacent eccentric hollow tubes 1 are aligned with each other, and are firmly connected. Can be connected. In addition, the communication cable 5 can be inserted straight and smoothly into the sheath pipes 4 on both sides and the pipe joint material 9 for interconnecting them.

As shown in the figure, when the pipe joint member 9 is inserted into the fitting holes 8 provided in the socket portion 6 and the spigot portion 7, the socket portion 6 and the spigot portion 7 are inserted.
A predetermined socket-like portion 1 between the pipe joint material 9
3 is provided, the fitting hole 8 of the pipe joint material 9 is provided.
It can be easily attached to and detached from.

As described above, the pipe joint member 9 fitted into the socket part 6 and the spigot part 7 has a certain degree of flexibility, and a cushion material 12 is provided between the joint end faces of the socket part 6 and the spigot part 7. Is interposed,
It is possible to cope with bending of the cable laying pipe at the time of propulsion or at the time of earthquake.

[0027]

Since the cable laying pipe and the connecting structure of the pipe according to the present invention have the above-described structure and operation, they have the following great effects.

Since the sheath pipe for inserting the cable is buried integrally in the thick wall portion of the eccentric hollow tube in advance, a plurality of sheath pipes can be buried without deteriorating the strength of the portion, and the whole can be buried. A high strength cable laying pipe can be constructed.

Since the portion where the sheath pipe is buried is formed as a thick wall portion and the other portion is formed as a thin wall portion, the material of the entire cable laying pipe can be reduced and the weight can be reduced.

Since the socket portion and the spigot portion of the cable laying pipe are entirely covered with a collar and are connected to each other, both the cable laying pipes are firmly connected to each other, and the connecting portion having a high water blocking property is formed. Can be formed.

As described above, since the socket portion and the spigot portion are covered with the collar, no uneven portion is formed on the connecting portion. There is no resistance and the propulsion can be smooth.

The socket portion and the spigot portion in which the sheath pipe is buried are provided with fitting holes for connecting to the ends of the sheath pipe, respectively. Can be matched with each other.

By fitting the pipe joint material into the fitting holes on both sides, the socket portion and the spigot portion on both sides can be more firmly connected at an accurate position.

As described above, by fitting the pipe joint material into the fitting holes of the socket portion and the spigot portion, the sheath pipes of the cable laying pipes on both sides can be connected to each other via this pipe joint material. ,
The communication cable can be easily inserted into the sheath pipe and the pipe joint material without damaging the surface of the communication cable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view and a transverse sectional view showing a cable laying pipe according to the present invention and a connecting structure thereof.

2 (A) and 2 (B) are enlarged longitudinal sectional views showing a main part of the connecting structure of FIG. 1 and the connecting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Eccentric hollow pipe 2 Hollow hole 3 Outer peripheral wall 3a Thick wall part 3b Thin wall part 4 Sheath pipe 5 Communication cable 6 Socket part 7 Spigot part 8 Fitting hole 9 Pipe joint material 10 Steel collar 11 Waterproof rubber 12 Cushion material 13 Socket-shaped part

 ──────────────────────────────────────────────────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 (2)

[Claims] 1. A cable laying pipe characterized in that a sheath pipe for inserting a cable, a hose, or the like is previously embedded integrally in a thick wall portion of an eccentric hollow pipe in an axial direction. 2. A connection structure for interconnecting cable laying tubes in which a sheath pipe for cable insertion is buried in a thick wall portion of the eccentric hollow tube, wherein a socket portion of one of the cable laying tubes is provided. The spigot part of the other cable laying pipe is fitted into the distal end of the collar whose base is attached and fixed to the outer circumference, and the end of the sheath pipe embedded in the socket part and the spigot part of the cable laying pipe. A connection structure for a cable laying pipe, characterized in that both ends of a pipe joint material are fitted and connected to fitting holes provided continuously in the pipe.