JP2555576Y2 - Rubber band stopper for fixing polyethylene sleeve for corrosion protection of ductile cast iron pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber band stopper for fixing a polyethylene sleeve for corrosion protection of a ductile cast iron pipe.

[0002]

2. Description of the Related Art Ductile cast iron pipes have become widespread as highly reliable pipes. However, depending on the buried environment, care must be taken to prevent corrosion of the pipe outer surface. Therefore, as a countermeasure against corrosion of the underground buried pipeline, a method of coating a tubular polyethylene sleeve on the outer periphery of the pipeline at a site where the pipeline is laid has been taken. Conventionally, adhesive tape was used to fix the polyethylene sleeve to the pipeline.However, in wetlands or rain, the workability of the sleeve coating was poor, and recently, fixing rubber bands have been widely used to fix the sleeve. ing.

FIG. 1 shows a single unit of a conventional fixing rubber band, and FIG. 2 shows an example of use of a conventional fixing rubber band. The fixing rubber band is made of ABS resin or equivalent or more resin. Anchor plate 1 to be molded and rubber band 2 vulcanized by EPDM (ethylene propylene rubber)
The anchor-shaped plate 1 is provided with a symmetrical inclined notch 3 and a rubber band insertion hole 4.
a, the band body 5 is formed, and the band body 5 is wound around a polyethylene sleeve 7 covered with a pipe 6, and then the bent ring-shaped portion 8 of the rubber band 2 is attached to the plate body 1. The polyethylene sleeve 7 is fixed to the pipe 6 by the contraction of the rubber band 2 by bridging the symmetrical inclined notch 3.

[0004]

Therefore, in the above-mentioned rubber band for fixing the polyethylene sleeve for corrosion protection of the ductile cast iron pipe, the plate 1 has a portion where the bent loop portion 8 of the rubber band 2 is passed. Because of the symmetrical inclined notch 3, the rubber band 2
The bent ring-shaped portion 8 is difficult to be caught, and is poor in workability as a means for fixing the polyethylene sleeve 7 coated on the pipeline at the site where the pipeline is laid, and is inconvenient to handle.
Depending on the shape of the inclined notch 3, the tensile strength of the plate 1
There is a drawback that the impact strength is weakened. Accordingly, an object of the present invention is to provide a rubber band stopper for fixing a polyethylene sleeve for corrosion protection of a ductile cast iron pipe, which can solve the above problems.

[0005]

According to the present invention, a resin plate 2 is provided.
2 sets of two round cord-shaped rubber band insertion holes 23
23, 23, 23 are provided, and the resin plate 22 has an arcuate U-shaped concave groove 25 in cross section on a part of the outer peripheral surface thereof
A thick portion 24 having both side edges raised is formed.
4, a resin plate 22 and an upper plate 27 formed wider than both side portions of the thick portion 24 in which both side edges are raised.
Are formed integrally, and two semi-circular U-shaped U-shaped portions are formed on the resin plate 22, the upper plate 27, and the thick portion 24 so as to fit the round cord-shaped rubber band 13 to the outer peripheral surfaces on both sides. D-shaped groove 2
6 and 26, respectively, and the base ends of these semicircular U-shaped concave grooves 26 and 26
A rubber band for fixing a polyethylene sleeve for corrosion protection of a ductile cast iron pipe, which is formed on each of semicircular U-shaped engaging portions 26a, 26a biting inward with dimensions larger than the diameter of Tool.

[0006]

According to the present invention, as shown in FIG. 6, rubber band insertion holes 23, 23 and 2 of a resin plate 22 formed in a horseshoe shape.
3 and 23, the ends 14 and 14 of the round cord-shaped rubber band 13 shown in FIG.
After this band body 18 is wound around a polyethylene sleeve 20 covering the outer periphery of a conduit 19 as shown in FIG. 4, the bent ring-shaped portion 16 of the round cord-shaped rubber band 13 is After being sunk from the outside of the thick portion 24 (FIG. 7) at one end to the inside of the upper surface plate 27, an arc-shaped cross section U of the thick portion 24 is formed.
The circular band-shaped rubber band 13 is engaged with the U-shaped concave groove 25, and the retained round string-shaped rubber band 13 is fitted into the U-shaped concave grooves 26, 26 and the U-shaped engaging portions 26a, 26a. 13 contracts the polyethylene sleeve 20 into the conduit 19
(Fig. 4).

[0007]

FIG. 3, FIG. 4, FIG. 5, FIG.
A description will be given based on FIGS. Reference numeral 22 denotes a horseshoe-shaped resin plate. Four round string rubber band insertion holes 23, 23 and 23, 23 are formed in the resin plate 22, and these round string rubber bands are inserted. A protruding substantially semicircular thick portion 2 having an arc-shaped U-shaped concave groove 25 on the outer peripheral surface at a part of the front side of the resin plate 22 continuous with the hole portion.
4 (FIGS. 7 and 8). An upper surface plate 27 having a thickness almost the same as the thickness and having an outer diameter larger than the outer diameter of the thick portion 24 is integrally formed on the front surface (front surface side) of the thick portion 24 in parallel with the resin plate 22. Is formed. A semicircular U-shaped groove 26 is provided at both ends of the arc-shaped U-shaped groove 25.
26 are formed (FIG. 6), and these semicircular U-shaped concave grooves 26, 26 face inward from both side edges of the resin plate 22 and the upper surface plate 27, respectively, and both side surfaces of the thick portion 24. The semi-circular U-shaped engaging portions 26a, 26a bite into each other with a width slightly deeper than the thickness of the round cord-shaped rubber band 13 and cut off.

Accordingly, as shown in FIG. 3, the two ends of the right and left upper and lower rubber band insertion holes 23
And 23, 23 and 23, respectively, and the annular portion 16 (FIG. 3) of the round rubber band 13 is applied to the outer peripheral surface of the thick portion 24 (FIG. 4). The both side surfaces of the round cord-shaped rubber band 13 connected to the annular portion 16 have an arc-shaped U-shaped concave groove 25 formed by a resin plate 22, a thick portion 24 and an upper plate 27, and a resin plate. U-shaped grooves 26, 26 opening outward at both ends of the arc-shaped U-shaped groove 25 having a cross section surrounded by the outer peripheral surface of the thick portion 24
And in a semicircular U-shaped engaging portion 26a, 26a continuously formed inward on both sides of the U-shaped concave grooves 26, 26, and the rubber band floats due to vibration or impact. Never come off.

[0009]

As described above, according to the present invention, the bent annular portion 16 of the round rubber band 13 is formed into an arc shape formed by the resin plate 22, the raised thick portion 24, and the upper plate 27. U-shaped concave groove 25 and a semi-circular U-shaped groove 26 communicating with the arc-shaped U-shaped concave groove 25, and a semicircular U-shaped engaging portion 26a continuous inwardly with the U-shaped groove 26 , 26a, the annular portion 16 of the round rubber band 13 is bent at the boundary between the U-shaped concave groove 25 having an arc shape and the U-shaped concave groove 26 having a semicircular cross section, and further the U-shaped groove is formed. The engagement portions 26a,
The ring-shaped rubber band 13 can be easily hooked on the thick portion 24 by one-touch operation, so that the rubber band can be prevented from loosening and falling off. In addition to the simplicity of handling, the operation of coating the polyethylene sleeve by using the fixing rubber band is facilitated. Further, compared with the conventional fixing rubber band plate having a symmetrical inclined cutout, the present invention exhibits excellent characteristics in mechanical strength, and also improves appearance and appearance.

[Brief description of the drawings]

FIG. 1 is a perspective view of an entire conventional fixing rubber band.

FIG. 2 is a perspective view showing a mounting state of a conventional fixing rubber band.

FIG. 3 is a perspective view of the whole fixing rubber band according to the present invention.

FIG. 4 is a perspective view of the fixing rubber band according to the present invention in use;

FIG. 5 is a front view of the fixing rubber band locking device of the present invention.

FIG. 6 is a front view of the fixing rubber band locking device according to the present invention, in which a part of the fixing device is cut away.

FIG. 7 is a longitudinal sectional side view of the fixing rubber band stopper of the present invention.

FIG. 8 is a front view of the fixing rubber band locking device of the present invention with the upper plate cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 13 Round cord-shaped rubber band 16 Ring part of round cord-shaped rubber band 22 Resin plate 23 Round cord-shaped rubber band insertion hole 24 Thick part 25 Arc-shaped U-shaped concave groove 26, 26 Semicircular U-shaped concave Grooves 26a, 26a Semicircular U-shaped engaging portion 27 Top plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A resin-made plate body 22 is provided with two round cord-shaped rubber band insertion holes 23, 23, 23, 23, which are arranged in parallel. A thickened portion 24 having an arcuate U-shaped cross-sectional groove 25 and raised on both side edges is formed, and the resin plate 22 and the upper surface plate 27 formed wider than both side portions of the thickened portion 24. Are formed integrally, and two semi-circular U-shaped U-shaped portions are formed on the resin plate 22, the upper plate 27, and the thick portion 24 so as to fit the round cord-shaped rubber band 13 to the outer peripheral surfaces on both sides. U-shaped grooves 26, 26 respectively formed in these U-shaped grooves 26, 26.
The base end of 26 is formed in a semicircular U-shaped engaging portion 26a, 26a which is substantially larger than the length of the diameter of the round cord-shaped rubber band 13 and bites inward. Rubber band stopper for fixing polyethylene sleeve for corrosion protection of ductile cast iron pipe.