JPH0143596Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a buried pipe tightening tool used for tightening and fixing an anti-corrosion sheet covering the connecting portion of a buried pipe in the ground, and particularly relates to the structure of the locking portion thereof.

Hitherto, as this type of fastener for buried pipes, a rubber or plastic band member provided with locking metal fittings at both ends has been widely used.

The fastening tool with this locking metal fitting can easily fix anti-corrosion sheets, etc. and has good work efficiency, but the metal locking metal fitting comes into contact with the top of the elastic sheet such as rubber. Since it is tightened, it makes strong contact, so there is a risk that the rubber sheet etc. may be cut by the edges of the metal fittings, and there is a concern that water or the like may seep into the interior through the cut portion.

In view of these points, this invention proposes a structure of a locking part in a buried pipe fastening tool in which the locking part of the locking metal fitting is covered with an elastic cover to protect the rubber sheet and the like.

The gist of this invention is that one metal fitting of a buried pipe fastening device that has locking metal fittings at both ends is made of rubber or plastic pipe-shaped material whose front part is configured to open up and down with cutouts on the side. A locking device for a buried pipe, characterized in that when a rear part of an elastic cover is fitted and the other metal fitting is locked to the metal fitting, the entire locking portion of both metal fittings is covered by the elastic cover. It concerns the structure of the stop part.

An embodiment of this invention will be described below with reference to the attached drawings. FIG. 1 is a cutaway perspective view of a locking part of a tightening device showing an embodiment of this invention, FIG. 2 is a perspective view of an elastic cover, FIG. 3 is a cross-sectional view taken in the width direction of the elastic cover, and FIG. 4 is a cross-sectional view taken in the length direction.

As shown in the figure, the buried pipe fastener 20 of this invention
The elastic band main body 25 has locking metal fittings 21 and 22 at both ends, and in the embodiment, a hook metal fitting 21 and a ring metal fitting 22. The locking portions 23 of these metal fittings 21 and 22 are covered with an elastic cover 10 as shown in FIG.

That is, the elastic cover 10 is made of a pipe-like material made of a stretchable elastic material such as rubber or plastic, and cutouts 13 and 14 are provided on both sides of the front part 11 of the cover 10 so that the front part can be vertically moved. configured to open.

As understood from the sectional views of FIGS. 3 and 4, the elastic cover 10 is fixed by fitting the rear part 12 into a hook fitting 21, which is one fitting of the tightening tool. Then, the front part 11 of the gopipe-like elastic cover, which is configured to open vertically by the side notches 13 and 14, is opened and the other ring fitting 22 is engaged with the hook fitting 21. .

When the cover front part 11 is returned to its original position after being engaged, the entire engagement part 23 of both metal fittings 21 and 22 is covered by the elastic cover 20.

The elastic cover 10 is formed with a length sufficient to cover the entire locking portion 23, and the cover 10 is locked when the horizontal notches 13 and 14 are formed slightly below the half-cut position of the cover. The entire portion 23 can be covered.

As mentioned above, according to this invention, since the entire locking part of the locking fitting is covered with the elastic cover made of rubber or plastic, the fitting does not come into direct contact with the anti-corrosion rubber sheet, etc. ,
It is now possible to prevent damage to the rubber sheet etc. due to the edges.

In addition, according to this invented structure, the rear part of the rubber or plastic pipe-shaped elastic cover is fitted into one of the metal fittings, and the front part is constructed so that it can be opened up and down by a cut on the side. Not only does it make it easier to attach the cover to one of the metal fittings,
The locking metal fittings at both ends of the fastening tool can be easily locked together, and the durability of the locking portion in the buried pipe can be improved without any reduction in conventional work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of a locking part of a tightening device showing an embodiment of this invention, Fig. 2 is a perspective view of an elastic cover, and Fig. 3 is a cross section cut in the width direction of a state covered with the elastic cover. FIG. 4 is a sectional view taken along the length direction. 10...Elastic cover, 11...Front part, 12...
Rear part, 13, 14... Notch, 20... Buried pipe tightening tool, 21, 22... Locking metal fitting, 23... Locking part.

Claims (1)

[Claims for Utility Model Registration] 1. One metal fitting 21 of a buried pipe fastening device 20 having locking metal fittings 21, 22 at both ends, the front part 11 is opened vertically by side cuts 13, 14. When the rear part 12 of the pipe-shaped elastic cover 10 made of rubber or plastic configured as shown in FIG. A structure of a locking part in a fastening tool for buried pipes, characterized in that the locking part is covered with a pipe. 2 Lateral cuts 13, 1 of the pipe-shaped elastic cover 10
4 is formed below the half-cut position of the cover. 4. The structure of the locking part in the buried pipe fastener according to claim 1, wherein the locking part is formed below the half-cut position of the cover.