JPH10212897A - Connection structure of propulsive pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form the inner circumferential surface sides of the mutual connecting sections of propulsive pipes smoothly. SOLUTION: An inner circumferential collar 20 formed of a thin metallic pipe or a thin synthetic resin pipe is projected backwards from the rear end face of a Hume pipe (the propulsive pipe) 10A in the front and fixed on the inner circumferential surface side of the rear end section of the Hume pipe 10A. The front section of a cylindrical connecting sleeve 24 having elasticity is fast stuck and fitted slidably on the outer circumferential surface side of the rear projecting section of the inner circumferential collar 20. A width expanding section 13 for fixing is molded on the inner circumferential surface side of the front end section of the Hume pipe 10B at a rear section in response to the wall thickness of the connecting sleeve 24, and a width expanding section 14 for bending is molded in the front section while being opened to the front end face side. The front section of the connecting sleeve 24 is arranged on the inner circumferential surface side of the width expanding section 14 for bending in a bendable manner, and the rear section of the connecting sleeve 24 is pushed and fastened to the inner circumferential side of the width expanding section 13 for fixing from the inner circumferential surface side by a cylindrical metal fitting 26 plastically deformed in an expanding shape to the outer circumferential side and used for fixing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a propulsion method,
When constructing pipes such as sewer pipes, especially bent pipes,
The present invention relates to a connection structure for a propulsion pipe that can form an inner peripheral surface of a connection portion of a propulsion pipe such as a fume pipe, a steel pipe, and a ceramic pipe smoothly.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a connecting portion of a fume pipe (propulsion pipe) has a metal collar 3 protruding rearward from a rear end face on the outer peripheral surface side of a rear end portion of the fume pipe 1. A small diameter portion 6 for connection is formed on the outer peripheral side of the front end portion of the fume tube 1, and a small diameter portion for connection of the rear fume tube 1 _B is formed on the inner peripheral side of the collar 3 of the front fume tube 1 _A. 6 inserted, and the gap between the collar 3 and the connecting small diameter portion 6 to seal through the seal member 5 made of annular rubber, fume tube 1 _a, 1 _B
The mutual connection of the water is stopped.

In the case of a large-diameter pipe, the gap between the front and rear end faces of the pipe is filled with mortar or the like to reduce the flow resistance in the pipe, and the inner peripheral surface of the joint is filled. Although it is shaped smoothly, joints are not generally treated in small-diameter pipes because it is difficult for an operator to enter the pipes.

[0004]

In recent years, it has become possible to construct a bent pipe even by a small-diameter propulsion method. The gap becomes large, and on the other hand, since the joint is not treated as described above, there is a problem that the resistance of the flow in the pipeline increases.

The present invention has been made in view of such a conventional problem,
When constructing pipes such as sewage pipes, especially bent pipes by the propulsion method, it is possible to form the inner peripheral surface side of the interconnecting parts of the propulsion pipes such as fume pipes, steel pipes, and ceramic pipes smoothly. It is intended to provide a connection structure for a propulsion pipe that can be used.

[0006]

SUMMARY OF THE INVENTION The features of the present invention for solving the conventional problems as described above and achieving the intended purpose are as follows.
In a connection structure of a propulsion pipe for interconnecting a plurality of propulsion pipes embedded by a propulsion method, a rigid cylindrical inner peripheral collar is provided on an inner peripheral surface side of an end of one of the propulsion pipes. A tubular connecting sleeve having elasticity is fixed on the inner peripheral surface side of the other end of the propulsion pipe, and the connecting sleeve is fixed to an outer peripheral surface of a protruding portion of the inner peripheral collar. Side and slidably contacted with each other.

A widened portion for bending is formed on the inner peripheral surface of the end of the propulsion tube with an opening on the end surface, and one portion of the connection sleeve is fitted on the outer peripheral surface of the inner collar. It is preferable that the connecting sleeve is fixed to the inner peripheral surface side of the propulsion pipe, and that the other portion of the connection sleeve is fixed to the inner peripheral surface side of the bending widening portion. It is preferable to be fixed by being pressed from the inner peripheral surface side by a cylindrical fixing metal member which is plastically deformed so as to expand toward the outer peripheral side.

A widened fixing portion is formed on the inner peripheral side of the end of the propulsion pipe in accordance with the thickness of the connecting sleeve. The connecting sleeve is fixed to the widened fixing portion. The peripheral collar is preferably formed by a thin metal tube or a thin synthetic resin tube.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 4, reference numeral 10 denotes a reinforced concrete fume pipe (propulsion pipe) formed into a substantially cylindrical shape.
, And the plurality of fume tube 10, 10 ... is, the inner peripheral collar 20 of the rear end of the front fume tube 10 _A, the outer peripheral collar 30
Insert the front end portion of the rear of the fume tube 10 _B between, so as to abut the front end surface of the rear fume tube 10 _B cushioning material 36 on the rear end face of the front fume tube 10 _A,
They are connected in a line in front and back, and the connection between them is stopped by the connection sleeve 24 and the sealing material 32.

On the inner peripheral surface side of the rear end portion of the fume tube 10, a widening portion 11 for fixing is formed with an opening on the rear end surface side, and the widening portion 11 for fixing is formed of a thin cylindrical stainless steel. The front part of the steel inner peripheral collar 20 is fixed in close contact with an adhesive or the like, and the rear part of the inner peripheral collar 20 projects rearward from the rear end face of the fume tube 10. The fixing widened portion 11 is formed corresponding to the thickness of the inner peripheral collar 20, and the inner peripheral surface of the inner peripheral collar 20 is formed by the fume tube 1.
0 is aligned with the inner peripheral surface.

A front portion of a cylindrical rubber connection sleeve 24 is fitted on the outer peripheral side of the rear protruding portion of the inner peripheral collar 20 in close contact with its own elastic force (shrinkage force). The rear portion of the connection sleeve 24 projects rearward from the rear edge of the inner peripheral collar 20. The outer peripheral surface of the inner peripheral collar 20 and the inner peripheral surface of the connection sleeve 24 are both formed to be smooth, and the inner peripheral collar 20 and the connection sleeve 24 are slidably fitted to each other. .

A widened fixing portion 13 is formed on the inner peripheral surface of the front end portion of the fume tube 10, and the widened fixing portion 13 has an inner peripheral collar 2 of the front fume tube 10.
The rear portion of the connection sleeve 24 fitted into the housing 0 is pressed from the inner peripheral surface side through a thin cylindrical fixing metal fitting 26 made of stainless steel, and is tightly fixed. In addition,
The widened fixing portion 13 is formed corresponding to the thickness of the connecting sleeve 24, and the inner peripheral surface of the connecting sleeve 24 is aligned with the inner peripheral surface of the fume tube 10.

In addition, on the inner peripheral surface side of the front end portion of the fume tube 10, in front of the fixing widening portion 13, a bending widening portion 14 is provided.
Is formed in a tapered shape which is expanded from the widening portion for fixing 13 and opened to the front end face side, and is provided on the inner circumferential surface side of the widening portion for fixing 14 behind the inner circumferential collar 20 of the front fume tube 10. A portion and a front portion (fitting portion) of the connection sleeve 24 fitted thereto are arranged, and the inner peripheral collar 20 is swingable with respect to the front end portion of the fume tube 10.
4 is bendable.

A fixing concave / convex portion 16 is formed on the outer peripheral surface side of the rear end portion of the fume tube 10, and the fixing concave / convex portion 16 has a thin, substantially cylindrical steel outer collar 30.
Is fixed via an adhesive or the like, the rear portion of the outer peripheral collar 30 projects rearward from the rear end surface of the fume tube 10, and the outer peripheral surface of the outer collar 30 is aligned with the outer peripheral surface of the fume tube 10. . A substantially annular rubber seal member 32 is provided on the inner peripheral surface side of the rear edge portion of the outer peripheral collar 30.
The sealing material 32 is fixed via an adhesive or the like, and protrudes toward the inner peripheral surface. A flat cylindrical cushion member 36 made of a foam material or the like is provided on the rear end surface of the fume tube 10.
Is fixed.

A small connecting portion 17 is formed on the outer peripheral surface of the front end portion of the fume tube 10, and the connecting small diameter portion 17 is formed of a sealing material 32 fixed to an outer peripheral collar 30 of the front fume tube 10. Slidably in close contact with the inner peripheral surface side of the.

The fume tubes 10, 1 connected in this way are
In the case of No. 0, the inner peripheral collar 20 and the connection sleeve 24 are tightly fitted to each other, so that it is possible to suitably perform the water stopping of the connection portion. Also, since the inner peripheral collar 20 and the connection sleeve 24 are slidable, and the front fitting portion of the connection sleeve 24 is bendable, the mutual connection portion of the plurality of fume tubes 10, 10,. The bent pipe can be suitably constructed by the propulsion method. When the mutual connecting portion of the fume tubes 10 and 10 is bent, the gap between the front and rear end surfaces of the fume tubes 10 and 10 is enlarged, and the enlarged gap is preferably closed from the inner peripheral surface side. Can be. In addition, the inner peripheral collar 20 and the connection sleeve 2
Since the inner peripheral surface of 4 is aligned with the inner peripheral surface of fume tubes 10 and 10, the inner peripheral surface side of the connecting portion of fume tubes 10 and 10 can be formed more smoothly.

As described above, the plurality of fume tubes 10, 10
In order to connect the inner peripheral collar 20, the inner peripheral collar 20 is fixed in advance to the fixing widening portion 11 at the rear end portion of the fume tube 10 via an adhesive when the fume tube 10 is manufactured. Note that, similarly to the connection sleeve 24 described later, the inner peripheral collar 20 is manufactured to have a slightly smaller diameter, and the inner peripheral collar 20 is inserted into the inner peripheral surface side of the rear end portion of the fume tube 10 so that the inner peripheral collar 20 is removed. Alternatively, the pressure may be uniformly spread from the inner peripheral surface side to be pushed and expanded, and may be plastically deformed to a predetermined diameter and fixed to the fixing widened portion 11.

The connecting sleeve 24 has an inner diameter smaller than the outer diameter of the inner peripheral collar 20 and an outer diameter slightly smaller than the inner diameter of the widened fixing portion 13 at the front end of the fume tube 10. The fixing metal 26 is formed so that the outer diameter is slightly smaller than the inner diameter of the connection sleeve 24.

[0019] Then, at the time of installation by jacking method, the outer peripheral surface side of the front of the fume tube 10 _A rear end of the inner peripheral collar 20 which is press-fitted from the vertical shaft, is fitted so as to expand the forward portion of the connecting sleeve 24 . Next, the rear fume tube 1
The 0 _B, the widened portion 13, 14 of the front end portion, so as to insert the connection sleeve 24 connected to the front of the fume tube 10 _A, installed.

[0020] Then, after pressing the rear of the fume tube 10 _B from the vertical shaft, the fixing brackets 26, inserted into the inner circumferential surface of the rear portion of the connecting sleeve 24, by applying uniform pressure from the inner circumferential surface Press and expand, plastically deform to a predetermined diameter,
The connecting sleeve 24, is pressed from the inner peripheral surface side by the fixing bracket 26, fixed to the anchoring widened portion 13 of the front end portion of the rear fume tube 10 _B.

The metal fitting 2 for fixing to the fume tube 10
As shown in FIG.
Can be suitably carried out. The fitting device 40 includes a cylindrical outer peripheral member 41 and an inner peripheral member 44.
The inner peripheral member 44 is provided so as to be relatively movable back and forth via a hydraulic jack 47 in a form in which the inner peripheral member 44 projects forward from the outer peripheral member 41, and a front edge portion of the outer peripheral member 41 and the inner peripheral member 44. Have annular pressure rings 42, 45, respectively.
Are projected and fixed to the outer peripheral side. On the outer peripheral surface side of the inner peripheral member 44, a cylindrical elastic pressing member 49 is mounted so as to be sandwiched between the pressing rings 42 and 45.
The elastic pressing member 49 is made of urethane having a rubber hardness of 50 ° to 70 °, and has an outer diameter slightly smaller than an inner diameter of the fixing metal member 26 when not compressed.

With such a fitting mounting device 40, with the fixing fitting 26 fitted on the outer peripheral surface side of the elastic pressing member 49,
It is inserted into the fume tube 10 from behind (vertical shaft side) and moved forward, and at the position on the inner peripheral surface side of the rear part of the connection sleeve 24, the hydraulic jack 47, the pressure rings 42, 45
The elastic pressurizing material 49 is compressed from the front and back through the. Then
The elastic pressing member 49 is elastically deformed and expands to the outer peripheral side, and the fixing metal 26 is uniformly pressed from the inner peripheral surface side by the elastic pressing member 49 and is expanded to a predetermined diameter. The connection sleeve 24 is deformed and fixed while being pressed from the inner peripheral surface side.

The metal fitting 26 for fixing the connection sleeve 24
May be collectively performed on a plurality of connecting portions after press-fitting a plurality of propulsion tubes 10, 10,...
In addition, each time the propulsion pipe 10 is press-fitted, it may be sequentially performed for each connection portion.

In the above-described embodiment, the case where the outer peripheral collar 30 is fixed to the outer peripheral surface side of the rear end portion of the fume tube 10 has been described. However, as shown in FIG. It is not necessary. Note that the same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

Further, in the above-described embodiment, the widened portion for bending is formed on the inner peripheral surface side of the front end portion of the fume tube, and the front fitting portion of the connection sleeve is bent and deformed, so that the mutual connection of the fume tube is achieved. Although the description has been made of the case where the connecting portion is bent, the connecting sleeve may be formed to have a large thickness to compressively deform the connecting sleeve. Also,
In the above-described embodiment, the case where the connection sleeve is pressed and fixed from the inner peripheral surface side by the fixing metal fittings has been described. However, the connection sleeve may be fixed via an adhesive or the like, and the inside of the fume tube may be fixed in advance. It may be fixed to the peripheral surface side.

In the above-described embodiment, the case where the inner peripheral collar is fixed to the rear end of the fume tube and the connection sleeve is fixed to the front end of the fume tube has been described. The connecting sleeve may be fixed, and the inner peripheral collar may be fixed to the front end portion of the fume tube.

Further, in the above-described embodiment, the widening portion for fixing is formed on the inner peripheral surface side of the propulsion pipe so that the inner peripheral collar and the inner peripheral surface of the connection sleeve are aligned with the inner peripheral surface of the propulsion pipe. However, when the inner peripheral collar and the connection sleeve are thin, the widening portion for fixing may not be provided. Further, the inner peripheral collar and the end of the connection sleeve may be formed in a tapered shape.

[0028]

As described above, in the connection structure for a propulsion pipe according to the present invention, a rigid cylindrical inner peripheral collar is provided on the inner peripheral surface side of one end of the propulsion pipe. From the end of the other propulsion tube, and an elastic cylindrical connecting sleeve is fixed to the inner peripheral surface side of the other end of the propulsion pipe. The connecting sleeve is slidable on the outer peripheral surface side of the protruding portion of the inner peripheral collar. Due to the close fitting, the mutual connection of the propulsion pipes can be stopped, and the mutual connection of the propulsion pipes can be bent. The gap between the end surfaces can be suitably closed from the inner peripheral surface side.

Further, a widened portion for bending is formed on the inner peripheral surface of the end of the propulsion pipe by opening to the end surface, and one part of the connection sleeve is fitted to the outer peripheral surface of the inner peripheral collar. By arranging the other part of the connection sleeve on the inner peripheral surface side of the propulsion pipe so as to be freely bendable on the inner peripheral surface side of the widened portion for bending, the mutual connection part of the propulsion pipe can be suitably bent. .

Further, the connecting sleeve is pressed and fixed from the inner peripheral surface side by a plastic fixing metal fitting which is plastically deformed so as to expand to the outer peripheral side, thereby fixing the connecting sleeve to the inner peripheral surface of the propulsion pipe. It can be suitably fixed to the surface side.

A widening portion for fixing is formed on the inner peripheral surface side of the end of the propulsion pipe in accordance with the thickness of the connecting sleeve, and the connecting sleeve is fixed to the widening portion for fixing, and the inner peripheral collar is formed. Formed by a thin metal tube or a thin synthetic resin tube, the inner peripheral surface of the propulsion tube is aligned with the inner peripheral collar and the inner peripheral surface of the connection sleeve, and the inner peripheral surface side of the connection portion of the propulsion tube is further increased. It can be formed smoothly.

[Brief description of the drawings]

FIG. 1 is an example of an embodiment of a connection structure for a propulsion pipe according to the present invention, and is a longitudinal sectional view showing a linear portion of a pipe.

FIG. 2 is an enlarged view of FIG.

FIG. 3 is a longitudinal sectional view of the embodiment of FIG. 1, showing a curved portion of a pipeline;

FIG. 4 is an enlarged view of FIG. 3;

5 is a half sectional view showing a fitting mounting device for mounting the fixing fitting in FIG. 1;

FIG. 6 is an enlarged longitudinal sectional view showing another example of the connection structure of the propulsion pipe according to the present invention, showing a linear portion of the pipe.

FIG. 7 is an enlarged vertical sectional view showing a conventional connection structure of a propulsion pipe.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 fume tube (propulsion pipe) 11 widened portion for fixing 13 widened portion for fixing 14 widened portion for bending 16 uneven portion for fixing 17 small diameter portion for connection 20 inner peripheral collar 24 connection sleeve 26 fixing metal fitting 30 outer peripheral collar 32 sealing material 36 Cushion 40 Metal fitting 41 Outer peripheral member 42 Pressure ring 44 Inner peripheral member 45 Pressure ring 47 Hydraulic jack 49 Elastic pressure material

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 390021197 Teihu Co., Ltd. 4-305-5 Ryogoku, Sumida-ku, Tokyo (71) Applicant 596097419 Nippon Steel Fiber Co., Ltd. 2- 13-18 Sanno, Ota-ku, Tokyo (71) Applicant 596097420 Toyo Spiral Tube Industry Co., Ltd. 2-77-7 Shimomaruko, Ota-ku, Tokyo (72) Inventor Hajime Suzuki 5-33-11 Shimbashi, Minato-ku, Tokyo Inside Nippon Hume Tube Co., Ltd. 72) Inventor Ichiro Fukiya 1-22-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Haneda Hume Kanko Co., Ltd. (72) Inventor Masahiro Noguchi 1-1-13 Manabe, Tsuchiura-shi, Ibaraki Pref. (72) Inventor Yukito Tsushima 2-24-14 Higashi-Nihonbashi, Chuo-ku, Tokyo Inside Zenith Pipe Co., Ltd. (72) Inventor Nobuyoshi Yoshikawa Sai (72) Inventor Chiyomatsu Okamura 2-13-18 Sanno, Ota-ku, Tokyo Inside Japan Fiber Fiber Co., Ltd. (72) Inventor Kenhide Terada 2-7 Shimomaruko, Ota-ku, Tokyo No. 7 Toyo Spiral Tube Industry Co., Ltd.

Claims (4)

[Claims] 1. A propulsion pipe connecting structure for interconnecting a plurality of propulsion pipes buried by a propulsion method, wherein a rigid cylindrical inner periphery is provided on an inner peripheral surface side of an end of one of the propulsion pipes. A collar is fixedly protruding from the end face of the propulsion pipe, and an elastic cylindrical connection sleeve is fixed to the inner peripheral surface side of the other end of the propulsion pipe, and the connection sleeve is formed of the inner peripheral collar. A connection structure for a propulsion pipe, characterized in that it is slidably fitted in close contact with the outer peripheral surface side of the protruding portion. 2. A widened portion for bending is formed on the inner peripheral surface side of the end of the propulsion pipe so as to open to the end surface side, and one part of the connection sleeve is fitted on the outer peripheral surface side of the inner peripheral collar. The connection structure for a propulsion pipe according to claim 1, wherein the connection portion is arranged to be bendable on the inner peripheral surface side of the widened portion for bending, and the other part of the connection sleeve is fixed to the inner peripheral surface side of the propulsion pipe. 3. The connection of the propulsion pipe according to claim 2, wherein the fixed portion of the connection sleeve is pressed and fixed from the inner peripheral surface side by a cylindrical fixing metal which is plastically deformed so as to expand toward the outer peripheral side. Construction. 4. A widening portion for fixing is formed on an inner peripheral surface side of an end portion of the propulsion pipe so as to correspond to a thickness of the connecting sleeve, and the connecting sleeve is fixed to the widening portion for fixing. 4. The connection structure for a propulsion pipe according to claim 1, wherein the peripheral collar is formed of a thin metal pipe or a thin synthetic resin pipe.