JP3232063B2 - Flexible piping joint device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where various cables are stored in a protective tube in a narrow tunnel, and when the protective tube is laid in the tunnel, particularly when the protective tube is laid in a narrow tunnel. The present invention relates to a flexible piping joint device capable of easily performing a piping operation even under a piping condition in which the operation is difficult with manual labor.

[0002]

2. Description of the Related Art Recently, underground burial of overhead wiring on the ground, and further, burial of various communication cables laid along a roadside zone or the like for road traffic control, for example, have been accompanied. A large-capacity tunnel structure pipe material is buried and used. When this pipe material itself is buried in the ground, it is configured in a straight line, a curved shape, etc. corresponding to various conditions of the wiring form, and after laying a protective pipe of a predetermined diameter inside the pipe, Various cables are stored in the protective tube.

[0003]

In laying such a protective tube, the inside diameter of the pipe is small, regardless of whether the inside diameter of the pipe is sufficiently large and the worker has enough time to enter and perform the work directly. Piping work in a pipeline where entry into a pit is difficult is extremely troublesome. However, if the pipe is straight, even if it can be dealt with by forcibly inserting the protective tube from one pipe opening side to the other pipe opening side even if it is forced, the curved section It is extremely difficult to pipe a protective tube on a certain curved road.

For this reason, a pipe is directly laid on a bent road portion by excavating the pipe by an excavation work from the ground, or a flexible protective tube is formed.

Accordingly, the present invention has been made in view of the above-described various existing circumstances. When laying a protective tube material for protecting and storing various cables in a pipe of a tunnel structure, a worker or the like is required. A flexible pipe joint device capable of automatically laying a pipe corresponding to a pipe form even in a narrow place or a bent place where it is difficult to enter a pit, thereby greatly reducing the cost of the pipe. The purpose is to:

[0006]

In order to solve the above-mentioned problems, according to the present invention, a protective tube main body 1 for storing and protecting various cables C and two ends of a flexible bent cylindrical portion 11 are provided. A flexible connecting means in which an insertion tube portion 15 for inserting an opening end portion of the protection tube main body 1 is connected, and a waterproof packing 20 which is slidably adhered around the protection tube main body 1 is provided at the opening end of the insertion tube portion 15. 10. The bent cylindrical portion 11 has a shape in which both side edges are formed in a substantially flat groove shape in cross section with each other, and the opening direction thereof is bent in opposite directions on the front and back, respectively, so that the entire cross section has a substantially S shape. A spiral metal strip is wound in a spiral shape, and adjacent side edges are overlapped so as to mesh with each other and joined to each other. , And the inner protective film 14 is similarly coated on the inner surface. Insertion tube 15
The connection end with the bent cylinder portion 11 has an outer diameter that is not large compared to the inner diameter of the end portion of the bent cylinder portion 11 and is slightly narrowed.
It can be configured by covering with an external protective film 13. The waterproof packing 20 has a ring shape provided in a storage groove 16 bulged at the opening end of the insertion tube portion 15, and has a substantially mountain-shaped cross-section on the inner peripheral surface for allowing the protection tube main body 1 to slide freely. Are arranged.

[0007] In the flexible pipe joint device according to the present invention configured as described above, the flexible connecting means 10 for connecting the protection pipe main bodies 1 to each other makes the protection pipe main bodies 1 mutually bendable. When the protection tube main body 1 and the like are inserted into the bent pipe P, the protection tube main body 1 and the like are automatically laid along the bending mode according to the bending mode. Flexible connecting means 1
Numeral 0 indicates that the protective tube main bodies 1 are connected to each other by an arbitrary number only by inserting the protective tube main bodies 1 into the insertion cylindrical portions 15 arranged at both ends of the bent cylindrical portion 11, and the length of each of the narrow portion and the bent portion in the pipeline P Is formed. The waterproof packing 20 of the flexible connecting means 10 is in close contact with the periphery of the protection tube main body 1 inserted into the insertion tube portion 15 by the water blocking streak 22 to block and waterproof from the outside. When the flexible connecting means 10 itself is bent along the bent shape of the pipe P, the flexible connecting means 10 contracts at an inner position of the bent portion, and expands at an outer position thereof, and slides in accordance with the bent shape while protecting the protective tube. The body 1 is waterproofed without being pulled out.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In the drawings, reference numeral 1 denotes various kinds of cables to be laid in a pipe P having a tunnel structure. This is a protection tube main body for storing and protecting C. The protection tube main body 1 itself is set to a predetermined length having an inner diameter sufficient to accommodate the cables C, for example, a length that does not interfere with the bending action of the bent portion in the pipe P, and is flexible as described later. The connection is made via the connection means 10 with an appropriate number of stations. When connecting a plurality of pipes, pipe P
The length is not limited to the length corresponding to the entire length, but is set to a length that is not shorter than at least the length of the bent portion in the pipeline P. The protection tube main body 1 itself is, for example, TP
2000mm length and 150mm diameter using FP as material
The degree is not limited to this.

The flexible connecting means 10 has a plurality of protective tube main bodies 1 connected to each other by bending the protective tube main body 1 so that the opening ends thereof are opposed to each other before and after the flexible connecting means 10 is flexible. At both ends of the bent tube portion 11, an insertion tube portion 15 for inserting the open end portion of the protection tube main body 1 is connected, and at the open end of the insertion tube portion 15, a waterproof packing 20 slidably adhered around the protection tube main body 1. The interior is composed.

The bent cylindrical portion 11 has an outer protective film 1 made of a synthetic resin on the inner and outer surfaces, at least the outer surface, of a metal spiral tube 12.
3, and the inner surface is also covered with an internal protective film 14 made of synthetic resin. The helical tube 12 is formed in a long shape in which both side edges are formed in a substantially flat groove shape in cross section with each other, and the opening direction thereof is bent in opposite directions on the front and back, respectively, so that the entire cross section has a substantially S shape. A metal tube-shaped plate is spirally wound, and adjacent side edges are overlapped and joined so as to mesh with each other to form a single tube. The spiral tube material 12 itself is made of stainless steel, such as SUS, which is excellent in rust resistance, in consideration of being installed in a pipe P having a tunnel structure, and has an inner diameter of a so-called large diameter. For example, 100m
The distance is about m to about 165 mm, but is not limited thereto.

The inner and outer protective films 13 and 14 are flexible.
It is made of a durable, more preferably tough synthetic resin, for example, a soft vinyl chloride resin, and is flexible enough to follow the bending and bending of the spiral tube material 12 itself and not hinder its bending and bending action. Has properties and hardness. The inner and outer protective films 13 and 14 are coated, for example, by dipping in a vinyl chloride resin solution in a molten state, so that the inner and outer protective films 13 and 14 have a substantially uniform thickness over the entire outer surface of the spiral tube 12. It is set to be thick and covered, and furthermore, is covered on the inner surface of the helical tube material 12, so that the insertion of the cables C housed inside is smooth. If necessary, an adhesive may be interposed between the surface of the spiral tube 12 and the inner and outer protective films 13 and 14.

The insertion tube portion 15 has an inside diameter and a length sufficient to allow the protection tube main body 1 to be connected to be slidably and watertightly inserted, and is closely connected to the opening end of the spiral tube 12 in the bent tube portion 11. . That is, at the connection end with the bent cylinder portion 11, the outer diameter is not so large as compared with the inner diameter of the end portion of the bent cylinder portion 11, and is slightly narrowed. 1 is covered with an external protective film 13 in consideration of waterproofness in a state of being inserted and connected to the end of the bent cylindrical portion 11 as shown in FIG.

A storage groove 16 bulging outward from the insertion tube portion 15 is formed at a free opening end of the insertion tube portion 15, that is, at an opening end opposite to a connection end with the bent tube portion 11. The waterproof packing 20 is provided in the storage groove 16. The waterproof packing 20 is formed of a ring-shaped rubber material so as to be slidably adhered around the protection tube main body 1 inserted into the insertion tube portion 15 by being stored in the storage groove 16.

A plurality of, for example, two annular grooves 21 are provided on the outer peripheral surface of the waterproof packing 20, and a plurality of stoppers having a substantially mountain-shaped cross section for allowing the protective tube main body 1 to slide freely are provided on the inner peripheral surface. The striations 22 are arranged and formed. The plurality of water-stop strips 22 have a continuous wavy inner peripheral surface of the waterproof packing 20 itself, and are partially crushed by the soft elasticity of the water-proof packing 20 so as to be closely attached to the periphery of the protection tube main body 1. In addition, when the waterproof packing 20 itself bends along the bent form when moving in the bent pipe P, the inside thereof is reduced on the inside and expanded on the outside on the contrary to maintain watertightness. Follow the slide of the protection tube main body 1 as it is. Reference numeral 23 in the figure denotes a cutout groove formed in the front and rear end surfaces of the waterproof packing 20, which effectively acts on the elasticity of the front and rear portions of the waterproof packing 20.

Next, an example of the use of the pipe P will be described. In a pipe P having a tunnel structure bent as shown in FIGS. 2 and 3, the pipe P is placed on a bogie rail R laid at the bottom thereof. Connection joint J that bends freely in response to bending
Trolleys B connected by a plurality of stations are set so as to be able to run and flexible connecting means 10 to be piped on those trolleys B
The plurality of protective tube main bodies 1 connected by are mounted. When placing the protection tube main body 1 on the cart B, the protection tube main body 1
Above, the flexible connection means 10 are respectively positioned on the connection joint J, and then the carriage B is run on the carriage rail R to insert and pipe a plurality of protection pipe main bodies 1 in the pipeline P.
Thereafter, if necessary, various kinds of cables C are stored in the protective tube main body 1 and the like lowered from the carriage B into the pipeline P.

When laying the pipe of the protection tube body 1 in the pipe material P, the protection tube body 1 and the like can be inserted directly into the pipe material without using the bogie rail R and the bogie B. Cables C can be stored without passing down.

[0017]

Since the present invention is constructed as described above, when laying a protective tube (1) for protecting and storing various cables C in a pipe P of a tunnel structure, an operator or the like is required. Even in a narrow place or a bent place where it is difficult to enter a tunnel, it is possible to automatically carry out a pipe laying in accordance with the form of the pipe, thereby greatly reducing the piping cost and the like.

That is, in the present invention, the protective tube main body 1 for accommodating and protecting the cables C and the opening end of the insertion cylindrical portion 15 connected to both ends of the flexible bent cylindrical portion 11 are provided around the protective tube main body 1. Waterproof packing 2 that slides freely
This makes it possible to automatically lay the pipe in the pipe P without disturbing the operator along the form.

In addition, the bent cylindrical portion 1 of the flexible connecting means 10
Reference numeral 1 indicates that at least the outer surface of the metal spiral tube 12 is coated with an external protective film 13 made of synthetic resin, so that the cables C housed inside the pipe P when the pipe is laid are surely protected. I do. In addition, since the inner surface is coated with the inner protective film 14, not only the work of passing the cables C through the flexible connecting means 10 into the protective tube main body 1 can be performed smoothly, but also, for example, the spiral tube 12 It is possible to avoid damage to the cables C at the time of wiring, which is caused by foreign matter entering the folds on the surface.

The waterproof packing 20 provided at the open end of the insertion tube portion 15 of the flexible connecting means 10 has a plurality of water stop portions 22 having a substantially mountain-shaped cross section on its inner peripheral surface.
It has excellent adhesion to the periphery of the inserted protective tube main body 1 and extremely effectively prevents infiltration into the protective tube main body 1 through the open end of the insertion tube portion 15.

In addition, when the protection tube main bodies 1 are connected to each other via the flexible connecting means 10 by inserting the protection tube main body 1 into the insertion tube portion 15, the water blocking struts 22 are attached to the protection tube main body 1
When the flexible connecting means 10 bends in correspondence with the bent form of the conduit P, it contracts on the inside and expands on the outside, so that the flexible connecting means 10 flexibly follows the bent form.
The insertion pipe inside can be performed extremely smoothly. In addition, since the bent slide maintains the waterproof action on the surface of the protection tube main body 1 and further keeps the protection tube main body 1 from being pulled out of the insertion tube portion 15, the flexible connecting means 10 prevents the protection tube main body 1 from being removed. The pipe laying configuration is made extremely stable without falling out.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view including a detailed view of a portion A and a portion B showing an embodiment of the present invention.

FIG. 2 is a schematic diagram when a pipe is used in a bent pipe.

FIG. 3 is a plan view of a main part of the same.

[Explanation of symbols]

C ... Cables B ... Dolly J ... Connection joint P ... Pipe line R ... Dolly rail 1 ... Protective tube main body 10 ... Flexible connection means 11 ... Bend tube section 12 ... Helix tube 13 ... External protective film 14 ... Internal protective film 15 ... Insertion tube part 16 ... Storage groove 20 ... Waterproof packing 21 ... Circular groove 22 ... Water stop part 23 ... Notch groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-164743 (JP, A) JP-A 52-69595 (JP, U) JP-A 2-21389 (JP, U) Jiko 50- 12021 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 9/06

Claims (1)

(57) [Claims] 1. A protective tube main body for accommodating and protecting various cables, and an insertion tube portion for inserting an open end of the protection tube main body into both ends of a flexible bent tube portion. At the open end, a flexible connecting means having a waterproof packing which is slidably adhered around the protection tube main body is provided. A long metal strip, which is formed so that its entire cross section is almost S-shaped by being bent in the opposite direction on the front and back, is spirally wound, and adjacent side edges are mutually connected. The inner and outer surfaces of a metal helical tube made by overlapping and joining so as to mesh with each other are covered with an inner and outer protective film made of synthetic resin, and the connection end of the insertion tube with the bent tube is bent tube. The outer diameter is not large compared to the inner diameter at the end of the part. In addition, the waterproof packing of the flexible connecting means is ring-shaped and arranged in a storage groove bulged at the opening end of the insertion tube portion. A flexible pipe joint device comprising a plurality of water-blocking struts each having a substantially mountain-shaped cross section which allows the protective tube main body to slide freely.