JPH10264252A - Fitting structure for strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the installation, and also, make the internal surface of a bonded part approx. flat, and at the same time, prevent a water permeability from being spoiled. SOLUTION: When a strip 14 is spirally wound along the internal surface of a pipe 12, a second supporting part 40 is arranged on the inside of a first supporting part 24, and at the same time, a pressing member 18 is attached at one side end in the width direction of the strip 14, and by the pressing member 18, the second supporting part 40 is pressed to the first supporting part 24 side. Therefore, when the first supporting part 24 and the second supporting part 40 relatively displace in the direction to separate the side ends in the width direction of the strip 14 from each other, a protuberance 26 which is formed on the internal surface at the leading end part of the first supporting part 24 and a protuberance 42 which is formed on the external surface of the leading end part of the second supporting part 40 are surely engaged. Also, a pressing part 50 which works as a lid as well, of the pressing member 18, covers the internal surface of a bonded part, and the internal surface of the bonded part is formed to be flat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip fitting structure, and more particularly, to a structure in which a strip is spirally wound along an inner surface of a tube, for example, to rehabilitate an existing tube or to protect an inner surface of a new tube. The present invention relates to a strip fitting structure for joining widthwise side ends of strips together.

[0002]

2. Description of the Related Art An example of this kind of prior art is disclosed in Japanese Unexamined Patent Publication No.
No. 75042. As shown in FIG. 18, the strip fitting structure 1 winds a strip-shaped strip 2 having a cross-sectional shape as shown in FIG. The side ends are joined by a joiner 5 having a bending / deforming portion 4 having a substantially U-shaped cross section.

[0003]

In the prior art, although the bending / extending deformation portion 4 of the joiner 5 extends, this extension has a certain limit. The joiner 5 had to be mounted while keeping the value below the value. Further, since a U-shaped concave portion is formed between the width-direction side ends of the strip 2 by the bending and stretching deformation portion 4, the concave portion must be filled with the filler 6 to prevent a decrease in water permeability. . Therefore, there was a problem that workability was poor as a whole.

[0004] On the other hand, an example of a technique for directly joining the ends of the strip in the width direction without using a joiner is disclosed in Japanese Unexamined Patent Publication No.
No. 100929. According to this conventional technique, the labor for mounting the joiner can be saved, but it is necessary to forcibly fit the one end in the width direction of the strip and the other end in the width direction of the strip, and the fitting operation is troublesome. There was a problem that it is.

SUMMARY OF THE INVENTION It is therefore a primary object of the present invention to provide a strip fitting structure which can be easily constructed.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a strip fitting structure for joining strip-shaped strips spirally wound along the inner surface of a tube to each other in a width direction, wherein the strips have a width equal to the width of the strip. A first support portion formed at one end in the first direction, a first protrusion formed on the inner surface of the distal end portion of the first support portion, a first protrusion formed at the other end in the width direction of the strip, and arranged inside the first support portion. A second support portion, a second protrusion formed on the outer surface of the distal end portion of the second support portion, and a pressing portion attached to one end in the width direction of the strip and pressing the second support portion toward the first support portion. A pressing member is provided, and at least one of the first support portion and the second support portion is disposed between the first protrusion and the second protrusion when one end in the width direction of the strip is in contact with the other end in the width direction. Form a predetermined gap, and one end in the width direction and the width direction A rectangular side end and the first protrusion and the second protrusion when separated at a predetermined interval has a length to engage a mating structure of the strip.

[0007]

The second support is disposed inside the first support, and the second support is pressed against the first support by a pressing member attached to one end in the width direction of the strip. Therefore, when the first support portion and the second support portion are relatively displaced in a direction in which the strips are abutted from each other in the width direction side abutment, the first support portion is formed on the inner surface of the distal end portion. The first protrusion and the second protrusion formed on the outer surface of the distal end of the second support portion are securely engaged.

Further, when a lid is formed on the pressing member and the lid covers the inner surface of the joint of the strip, the inner surface of the joint can be flattened.

[0009]

According to the present invention, since a joiner is not used, labor for mounting the joiner can be saved. In addition, since the first projection and the second projection are securely engaged with each other by pressing the second support portion toward the first support portion side by the pressing member, the widthwise side ends of the strips are aligned in the widthwise direction. This eliminates the need for forced fitting. Therefore, workability can be improved as a whole.

[0010] The above and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A strip fitting structure 10 of this embodiment shown in FIG. 1 is used for rehabilitating an old pipe 12 buried in the ground or for a new pipe 12, as shown in FIG. In order to protect the inner surface, the widthwise side ends of the strips 14 wound spirally along the inner surface of the tube 12 are joined together to form the inner tube 16, and the inner surface of the joint is pressed by a pressing member 18. It is made to cover with.

The strip 14 is formed continuously by extrusion of a synthetic resin such as hard vinyl chloride, for example, having a cross-sectional shape as shown in FIG. . The inner surface of the main body 20 is formed flat so as not to impair water permeability, and the outer surface of the main body 20 has a plurality of legs 2 having a substantially T-shaped cross section that abut on the inner surface of the pipe 12.
2 are formed extending in the longitudinal direction.

At one end in the width direction of the main body 20,
The first support portion 24 is formed to extend a predetermined length in the width direction, and a protrusion 26 is formed on the inner surface of the distal end portion of the first support portion 24. Further, two protrusions 28a and 28b are formed on the inner surface of the base of the first support portion 24, and the protrusions 28a and 28b are formed.
b, the protrusions 30a and 3
0b is formed. The first support (base) 24 and the protrusions 28 a and 28 b constitute a mounting part 32 for mounting the pressing member 18. Further, legs 34 and 36 having a substantially L-shaped section are formed on the outer surfaces of both ends in the width direction of the first support portion 24.

On the other hand, a leg 38 having a substantially L-shaped cross section is formed at the other end in the width direction of the main body 20 so as to contact the inner surface of the tube 12. Further, a second support portion 40 is formed extending from the base portion of the leg portion 38 in the width direction of the main body 20 by a predetermined length and disposed inside the first support portion 24. ,
A projection 42 is formed. Note that the length of at least one of the first support portion 24 and the second support portion 40 is
When one end in the width direction and the other end in the width direction are in contact with each other, a predetermined space is formed between the first projection 26 and the second projection 42 (FIG. 1), and one end in the width direction. When the first protrusion 26 and the second end in the width direction are separated at a predetermined interval, the first protrusion 26 and the second protrusion
The projection 42 is set to be engaged (FIGS. 5 and 6).

The pressing member 18 includes a band-shaped main body 44 having a width substantially equal to the width of the first support portion 24. Projections 46a and 46b are formed on the outer surface of the main body 44 to be fitted to the outsides of the projections 28a and 28b, respectively.
The protrusions 48a and 48b engaged with the protrusions 30a and 30b respectively are provided on the inner surfaces of the distal end portions of the protrusions 30a and 30b.
Is formed. The portion from the end of the main body 44 where the protrusion 46a is not formed to the protrusion 46b covers the inner surface of the joint and presses the second support 40 toward the first support 24. The unit 50 is configured.

When the inner tube 16 is formed inside the tube 12 using the strip 14 and the pressing member 18, the second support portion 40 is disposed inside the first support portion 24,
4 while keeping the widthwise side ends of the strips 14 in contact with each other.
Is spirally wound along the inner surface of the tube 12. Then, as shown in FIG. 4, the pressing member 18 is prepared on the inner surface side of the joining portion, and the pressing members 18 are attached to the mounting portion 32 by fitting the projections 46 a and 46 b outside the projections 28 a and 28 b. Then, the second support portion 40 is pressed against the first support portion 24 by the cover / pressing portion 50 of the pressing member 18.

At this time, when there is a step on the inner surface of the tube 12, the strip 14 and the pressing member 18 are bent along the step as shown in FIG. 5 or FIG. Further, when the pipe 12 is a curved pipe curved at a predetermined curvature, the interval between the width direction side ends of the main body 20 becomes wider outside the curved portion. As shown by a two-dot chain line, the first support portion 24 and the second support portion 4
0 is relatively shifted, and the protrusion 42 formed on the outer surface of the distal end of the second support portion 40 and the protrusion 26 formed on the inner surface of the distal end of the first support portion 24 are engaged.

When the operation of winding the strip 14 is completed,
As shown in FIG. 1, a backing material 52 is filled between the tube 12 and the strip 14. According to this embodiment, since the width direction side ends of the strips 14 can be directly joined, the labor for mounting the joiner can be saved. Further, since the projections 26 and the projections 42 are securely engaged by pressing the second support portions 40 against the first support portions 24 with the pressing members 18, the time required for conventional forced fitting is reduced. Can be omitted. Therefore, it can be easily constructed, and the separation of the joint can be reliably prevented.

The strip 14 and the pressing member 18
Has flexibility, and the first support portion 24 and the second support portion 40 can be relatively displaced in the width direction, so that it is possible to sufficiently cope with a change in the inner surface of the tube 12. Further, the lid / pressing portion 5
Since 0 covers the inner surface of the joining portion, the inner surface of the joining portion can be made substantially flat, and the water permeability can be prevented from being impaired.

In the above-described embodiment, the first support 24
And the second support portion 40 and the like are formed integrally with the main body 20. For example, as shown in FIGS. 7 and 8,
These may be formed as separate members from the main body, and these members may be connected to the conventional strip 54 (FIG. 19) for use. In a strip fitting structure 56 of another embodiment shown in FIGS. 9 and 10, a strip 58 having a sectional shape as shown in FIG. 11 is used, and a pressing member 60 is attached to one end in the width direction of the strip 58. Can be

The strip 58 includes a band-shaped body 62. At one end in the width direction of the main body 62, a substantially U-shaped space 68 is formed by the first support portion 64 and the plate portion 66,
A protrusion 70 is formed on the inner surface of the distal end of the first support portion 64. On the inner side (lower side in FIG. 9) of the plate portion 66, a groove 72 is formed extending in the longitudinal direction, and projections 74a and 74b are formed on the inner surface of the entrance of the groove 72. On the other hand, a space 6 is provided at the other end in the width direction of the main body 62.
A second support portion 76 housed inside the first support portion 64 and formed inside the first support portion 64 is formed, and projections 78a and 78b are formed on the inner surface and the outer surface of the distal end portion of the second support portion 76.

The pressing member 60 includes a band-shaped main body 80.
On the outer surface of the main body 80, a protrusion 82 fitted into the groove 72 and a pressing portion 84 for pressing the second support portion 76 toward the first support portion 64 are formed. And projections 86a and 86b engaged with the projections 74a and 74b formed in the groove 72, respectively. Then, a portion from the end of the main body 80 where the protrusion 82 is not formed to the pressing portion 84 forms a lid 88 that covers the inner surface of the joint.

According to this embodiment, the second pressing member 60
By pressing the support portion 76 against the first support portion 64, the protrusion 78b and the protrusion 70 are surely engaged with each other. Therefore, before attaching the pressing member 60, the entrance of the space 68 is relatively wide. Can be secured. Therefore, the second support portion 76 can be easily inserted into the space 68.

As shown in FIG. 12 or FIG.
Since the strip 58 and the pressing member 60 are bent and the first support portion 64 and the second support portion 76 can be relatively displaced in the width direction, it is possible to sufficiently cope with a change in the inner surface of the tube 12. In addition, since the inner surface of the joint is covered with the lid 88, the inner surface of the joint can be made substantially flat, thereby preventing loss of water permeability.

In this embodiment, for example, FIG.
As shown in FIGS. 4 and 15, by shifting the tip position of the first support portion 64 and the tip position of the plate portion 66 from each other, a wide entrance of the space 68 is ensured, and the tip shape of the pressing portion 84 is correspondingly adjusted. May be modified. When the entrance of the space 68 is widened in this way, the second support portion 76 can be more easily inserted into the space 68.

Also in this embodiment, as shown in FIGS. 16 and 17, for example, the first support portion 64 and the second support portion 76 are formed as members separate from the main body 62, and these members are formed. It may be connected to a conventional strip 54 for use.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention;

FIG. 2 is an illustrative view showing a state where a strip is spirally wound around an inner surface of a tube.

FIG. 3 is an illustrative view showing a strip used in the embodiment of FIG. 1;

FIG. 4 is a perspective view showing a construction method of the embodiment in FIG. 1;

FIG. 5 is an illustrative view showing a state in which a strip and a pressing member are bent in the embodiment of FIG. 1;

FIG. 6 is an illustrative view showing a state where a strip and a pressing member are bent in the embodiment of FIG. 1;

FIG. 7 is an illustrative view showing a modified example of the embodiment in FIG. 1;

FIG. 8 is an illustrative view showing a strip used in the modification of FIG. 7;

FIG. 9 is an illustrative view showing another embodiment of the present invention;

FIG. 10 is a perspective view showing a construction method of the embodiment in FIG. 9;

FIG. 11 is an illustrative view showing a strip used in the embodiment in FIG. 9;

FIG. 12 is an illustrative view showing a state where a strip and a pressing member are bent in the embodiment of FIG. 9;

FIG. 13 is an illustrative view showing a state where a strip and a pressing member are bent in the embodiment of FIG. 9;

FIG. 14 is an illustrative view showing a modified example of the embodiment in FIG. 9;

FIG. 15 is an illustrative view showing a construction method of a modification of FIG. 14;

FIG. 16 is an illustrative view showing another modification of the embodiment in FIG. 9;

FIG. 17 is an illustrative view showing a strip used in a modification of FIG. 16;

FIG. 18 is an illustrative view showing a conventional technique;

FIG. 19 is an illustrative view showing a strip used in the prior art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Strip fitting structure 12 ... Tube 14 ... Strip 16 ... Inner tube 18 ... Pressing member 20 ... Main body 24 ... 1st support part 26, 42 ... Projection 28a, 28b ... Projection 32 ... Mounting part 40 ... Second support Portions 46a, 46b Projection 50 Cover / pressing portion 88 Cover

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mineo Shinohara 7-6, Bashizashi-cho, Tennoji-ku, Osaka-shi In-house Osaka Waterproofing Co., Ltd. (72) Inventor Tsuneo Miyagawa 1-8-8 Shinkawa, Chuo-ku, Tokyo Stock Inside Kubota Corporation (72) Inventor Naoya Ozeki 1-8-8 Shinkawa, Chuo-ku, Tokyo Inside Kubota Corporation (72) Inventor Toshio Nakamoto 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Plant Co., Ltd. (72) Inventor Kazutaka Takada 64 Ishizu-Kitacho, Sakai-shi, Osaka Inside Kubota Vinyl Pipe Factory

Claims (3)

[Claims] 1. A strip fitting structure for joining widthwise side ends of a strip strip spirally wound along an inner surface of a tube, wherein the strip is formed at one side end in the widthwise direction of the strip. A first protrusion formed on the inner surface of the distal end of the first support; a second support formed on the other end in the width direction of the strip and disposed inside the first support; A second protrusion formed on the outer surface of the distal end portion of the second support portion; and a pressing portion attached to the one end in the width direction of the strip and pressing the second support portion toward the first support portion. A pressing member having at least one of the first support portion and the second support portion, the first protrusion and the first protrusion when the one end in the width direction and the other end in the width direction of the strip are in contact with each other. The second
The first projection and the second projection are engaged when a predetermined interval is formed between the projection and the one end in the width direction and the other end in the width direction are separated at the predetermined interval. A strip fitting structure having a length such that 2. The strip fitting structure according to claim 1, wherein the pressing member includes a lid that covers an inner surface of a joint between the one end in the width direction and the other end in the width direction. 3. The lid has a function of the pressing portion.
The strip fitting structure according to claim 2.