JP3571481B2 - Joiner and strip joining structure by joiner - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joiner and a joining structure of strips by the joiner, and more particularly, to a joiner for joining widthwise side edges of a strip spirally wound along an inner surface of an aged sewer pipe or the like, and a joining of the strips by the joiner. Regarding the structure.
[0002]
[Prior art]
An example of this type of joiner and a joining structure of strips by the joiner is disclosed in Japanese Patent Application Laid-Open No. 8-75042. That is, in FIG. 2 of this publication, the ridge formed on the engaging portion of the joiner is fitted to the winding side edge (width direction side edge) of the strip, and the gap between the inner surface of the pipe and the strip and the joiner is formed. Is disclosed.
[0003]
[Problems to be solved by the invention]
In the prior art, although the ridge of the joiner is fitted to the side edge in the width direction of the strip, there is a problem that the joiner is easily separated from the strip.
Therefore, a main object of the present invention is to provide a joiner and a joining structure of strips by the joiner, which can prevent the detachment of the joiner.
[0004]
[Means for Solving the Problems]
A first invention is a joiner for joining widthwise side edges of a band-shaped strip spirally wound along the inner surface of a tube, wherein the band-shaped strip is attached to one side edge in the width direction of the band-shaped strip. A joiner has a groove defined by a first wall formed and near the center of the strip strip and a second wall far from the center of the strip strip, and the joiner includes a body disposed between the width-direction side edges; provided, ridges fitted to the groove of the strip-shaped strips, provided on the body, clamping portions for clamping a ridge in cooperation with the second wall, and the inner surface and the body of the provided in the tube to the body It is a joiner provided with an anchor part embedded in a backing material filled between them.
[0005]
A second invention is a strip strip spirally wound along an inner surface of a tube, the first wall and the strip strip being formed on one side edge in the width direction of the strip strip and near the center of the strip strip. 3. The widthwise side edges of such strips having a groove defined by a second wall remote from the center of the strips are joined together using a joiner according to claim 1 or 2, and the inner surface of the tube and the strips and A joining structure of strips by a joiner, in which a backing material is filled between each of the joiners and an anchor portion is embedded in the backing material.
[0006]
[Action]
The anchors provided in the body of the joiner are embedded in the backing material filled between the inner surface of the pipe and the joiner (body), so after the backing material is hardened, the anchors are firmly attached to the backing material. Fixed.
[0007]
【The invention's effect】
According to the first and second aspects, it is possible to prevent the joiner from coming off the strip.
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0008]
【Example】
The joiner 10 of this embodiment, shown in FIGS. 1-3, spirals along the inner surface of the sewer 12 to rehabilitate the aged sewer 12 or to protect the inner surface of the new sewer 12. The inner tube 16 is formed by joining widthwise side edges of the strip-shaped strips 14 wound in a shape.
[0009]
The strip 14 is formed continuously by extruding a synthetic resin such as hard vinyl chloride, for example, and includes a strip-shaped main body 18. On one main surface of the main body 18, a leg portion 20 having a substantially T-shaped cross section which is in contact with the inner surface of the sewer pipe 12 is formed to extend in the longitudinal direction. It is formed to extend in the longitudinal direction. The groove 22 is defined by a first wall 24 close to the main body 18 and a second wall 26 remote from the main body 18. On the inner surface of the second wall 26, as shown in FIG. Is formed. A leg 30 having a substantially U-shaped cross section is formed at the bottom of the groove 22 to be in contact with the inner surface of the sewer pipe 12.
[0010]
The joiner 10 is formed continuously by extrusion molding of a hard synthetic resin such as hard vinyl chloride or the like, and includes a band-shaped main body 32 having a flat inner surface. At both ends in the width direction of the main body 32, ridges 34 fitted into the groove 22 of the strip 14 and holding portions 36 for holding the second wall 26 of the strip 14 in cooperation with the ridges 34 project from the outer surface. Formed. The protrusion 34 is formed with a protrusion 38 having a substantially saw-tooth cross section which is engaged with the protrusion 28 formed on the second wall 26. Further, an anchor portion 40 is formed on the main body 32 so as to extend from the holding portion 34 in a direction substantially parallel to the main surface of the main body 32.
[0011]
When the inner pipe 16 is formed on the inner surface of the sewer pipe 12, the strip 14 is spirally wound along the inner surface of the sewer pipe 12 so as to be clearly understood from FIGS. Is inserted into the groove 22 of the strip 14 to join the side edges of the strip 14 in the width direction. At this time, if there is a step on the inner surface of the drain pipe 12, the main body 32 of the joiner 10 is deformed along the step as shown in FIG.
[0012]
After the inner tube 16 is formed, a backing material 42 such as cement milk is filled between the inner surface of the drain 12 and the strip 14 and the joiner 10. Then, the anchor portion 40 formed in the joiner 10 is embedded in the backing material 42, and after the backing material 42 is hardened, the anchor portion 40 is firmly fixed to the backing material 42. In addition, since the inner surface of the main body 32 in the joiner 10 is formed flat, it is not necessary to post-process this inner surface.
[0013]
According to this embodiment, since the anchor portion 40 formed on the joiner 10 is fixed to the backing material 42, the detachment of the joiner 10 from the strip 14 can be prevented.
In the above-described embodiment, the entire joiner 10 is formed of a hard synthetic resin such as hard vinyl chloride, but the central portion of the main body 32 is formed of a soft synthetic resin such as soft vinyl chloride. You may do so. By doing so, the main body 32 can have greater flexibility, so that it is possible to sufficiently cope with a case where the step (FIG. 4) generated on the inner surface of the sewer pipe 12 is large.
[0014]
Further, as shown in FIG. 5, for example, the central portion of the main body 32 may be formed in a U shape with a hard synthetic resin or a soft synthetic resin. In this way, since the main body 32 expands and contracts in the width direction in the U-shaped portion 44, it is possible to sufficiently cope with variations in the interval between the side edges of the strip 14 in the width direction. However, in this case, it is necessary to fill the U-shaped recess formed on the inner surface of the main body 32 with a filler to flatten the inner surface.
[0015]
Furthermore, the anchor portion 40 is not limited to the shape of the above-described embodiment, and may be formed in, for example, a substantially L shape as shown in FIG. 6, or may be formed in a substantially T shape as shown in FIG. May be formed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is an illustrative view showing a use state of the embodiment in FIG. 1;
FIG. 3 is an illustrative view showing a state where an inner pipe is formed on an inner surface of a sewer pipe;
FIG. 4 is an illustrative view showing a state of a step portion;
FIG. 5 is an illustrative view showing another embodiment of the present invention;
FIG. 6 is an illustrative view showing another embodiment of the present invention;
FIG. 7 is an illustrative view showing another embodiment of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Joiner 12 ... Sewage pipe 14 ... Strip 16 ... Inner pipe 32 ... Main body 34 ... Protrusion 36 ... Nipping part 38 ... Protrusion 40 ... Anchor part 42 ... Backing material

Claims (3)

A joiner for joining widthwise side edges of a strip strip spirally wound along an inner surface of a tube,
The strip has a groove formed on one side edge of the strip in the width direction and defined by a first wall near the center of the strip and a second wall far from the center of the strip. ,
The joiner
Body disposed between front Symbol widthwise side edges,
Provided in front Symbol body, ridges fitted to the groove of the strip the strip,
A holding portion provided on the main body, for holding the second wall in cooperation with the ridge ;
Provided in front Symbol body comprises an anchor portion embedded in Urakomi material is filled between the inner surface and the body of the tube, joiner. The joiner according to claim 1 , wherein the anchor portion extends from the holding portion in parallel with the main body . A strip strip spirally wound along the inner surface of the tube , wherein the strip is formed on one side edge in the width direction of the strip strip and is near a center of the strip strip and a center of the strip strip. The widthwise side edges of such strips having a groove defined by a remote second wall are joined together using a joiner according to claim 1 or 2, and the inner surface of the tube and the strip and the strips are joined together. A joining structure of strips by a joiner, wherein a backing material is filled between each of the joiners and the anchor portion is embedded in the backing material.

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