JPH0481077B2 - - Google Patents

Description

Means 6 A locking piece consisting of.

[Detailed description of the invention]

This invention relates to a piece that locks into a pipe or hole.

Specifically, if the piece that locks onto a pipe or hole is a pipe, for example, when removing rust from a water faucet, the piece can be expanded inside the pipe and brought into close contact with the pipe to stop water. In the case of a hole, it can be used as an anchor bolt by expanding the piece into a predetermined hole made in concrete and fixing it in close contact with the hole.

That is, the present invention relates to a locking piece that is locked to something in the shape of a tube or a hole as in the previous example.

As shown in Fig. 1, the conventional locking piece has a rubber ring A that locks or comes into close contact with the pipe or hole, and the rubber ring A is fitted with a clamping seat plate on its head. Due to the screwing of the clamping metal fitting D screwed onto the screw rod C having B, the clamping metal fitting D is compressed from the front and rear directions and expands. It is also something to keep.

Therefore, with the conventional locking piece, even if it is necessary to remove the clamping metal fitting D, if the clamping metal fitting D is removed, the rubber ring A can be removed.
Since it would return to its original state, the clamping metal fitting D could not be removed in order to maintain the expanded state or to maintain the locking state.

Here, the present inventor has invented a locking piece in which the expanded portion of the locking piece can be locked to a pipe or a hole even without the clamping metal fitting, and the present invention is directed to such a method. The purpose is to provide a locking piece.

In order to achieve such an object, the present invention includes a threaded portion 1, a tapered portion 2 that gradually expands toward the tip at the tip of the threaded portion 1, and a tapered portion 2 having a diameter smaller than that of the threaded portion 1 at the base end of the threaded portion 1. a hard shaft rod 4 which is integrally and concentrically provided with a reverse threaded portion 3; and a plastically deformable penetrating tube that loosely fits into the shaft rod 4 and can abut at an intermediate position of the tapered portion 2. It is characterized in that it consists of a shaped lead pipe and a pressing means 6 having a nut 8 screwed onto the threaded part 1 to press the lead pipe 5 in the direction of the tapered part 2.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is an exploded front view of the present invention, and FIG. 3 is a usage example diagram showing the expanded state.

The shaft rod 4 is formed by integrally molding a tapered portion 2 that gradually widens toward the front end of the threaded portion 1 and a reverse threaded portion 3 that is provided at the base end of the threaded portion 1, and will be described later. It is made of a harder metal than the lead pipe 5. lead pipe 5
This inner surface gradually expands toward the tip as shown by the broken line. Further, it is loosely fitted into the shaft rod 4, so that the inner surface of the front end can come into contact with the middle of the tapered portion 2. The pressing means 6 for pressing the lead pipe 5 in the direction of the tapered portion 2 is made of the same material as the shaft rod 4, and has approximately the same inner and outer diameters as the rear end surface of the lead pipe 5, and a pressing fitting 7 to be provided at the rear of the lead pipe 5. and a nut 8 to press the pressing fitting 7 in the direction of the lead pipe 5. The pressing fitting 7 is loosely fitted onto the shaft rod 4, and the nut 8
is screwed into threaded portion 1.

The structure of the present invention is as described above, and the operation and effects thereof will be explained next.

A tool (not shown) for operating the present invention consists of an inner shaft whose tip is screwed into the reverse threaded portion 3, and an outer cylinder into which the inner shaft is fitted and whose tip is fitted into the nut 8. Are suitable.

First, after connecting the locking piece of the present invention to the tool according to the above-mentioned procedure, when the outer cylinder is rotated in the direction in which the nut 8 is threaded while the inner shaft is fixedly supported, the lead pipe 5 is moved to the pressing fitting 7. The tapered portion 2 first comes into contact with the intermediate position of the tapered portion 2.

As is obvious, the diameter of the tapered portion 2 beyond this contact position is larger than the diameter of the lead pipe 5. Therefore, as the nut 8 is further rotated, the lead pipe 5 moves forward while resisting on the surface of the tapered part 2, and is compressed by the tapered part 2 and the nut 8 from the front and rear of the lead pipe 5 to form a tapered part. It can be layered on two sides in an expanded state. This state becomes the state of expansion and expansion of the maximum diameter. The lead pipe 5 that has once expanded inside the pipe or hole in this way is not held in expansion by the pressing fittings 7 or the nuts 8, and even if these are removed, it will not return to its original state. do not have.

Note that the drawing symbol E represents a tube or a hole.

If the expansion part of the conventional locking piece was a rubber ring, the locking effect would be weak because the quality would deteriorate after long-term use, but with the locking piece of the present invention, the locking effect would not change and it could be used for a long time. The effect of the locking in use can be sufficiently maintained. In particular, if the object to be locked is metal, the locking is stronger than with conventional rubber rings. Furthermore, since the state of expansion inside the pipe does not change even if the pressing fitting 7 or the nut 8 is removed, for example, the reverse threaded part 3 is removed and the threaded part 1 is cut in the middle, and the remaining threaded part 1 can be used. For example, if a separate packing is provided on the rear end surface of the expanded lead pipe 5 and tightened with a separate cap that can be screwed onto the screw portion 1, the opening of the pipe can be completely closed. It is also possible to prevent fluid below the stopper from leaking out of the pipe.

In addition, even if the pressing metal fitting 7 and nut 8, which are the pressing means 6, are removed, the inside of the faucet pipe can remain water-stopped, so rust removal work can be carried out with the water turned off. This eliminates the trouble of removing the conventional locking piece once the water has been cut off, and the unreasonable problems of not being able to remove rust while the water is still cut off.

That is, since the locking piece of the present invention has a feature that it does not return to its original state once it is expanded, no pressing means for maintaining the expansion is required at all after the locking piece is expanded. Therefore, the effects of the present invention are extremely significant when the pressing means must be removed, or when the construction work can be carried out more simply and quickly.

[Brief explanation of drawings]

FIG. 1 is a conventional locking piece, FIG. 2 is an exploded front view of the present invention, and FIG. 3 is an illustration showing an example of its use in an expanded state. DESCRIPTION OF SYMBOLS 1... Threaded part, 2... Tapered part, 3... Reverse threaded part, 4... Shaft rod, 5... Lead pipe, 6... Pressing means.

Claims (1)

[Scope of Claims] 1. A threaded portion 1, a tapered portion 2 that gradually widens toward the tip at the tip of the threaded portion 1, and a reverse threaded portion 3 having a smaller diameter than the threaded portion 1 at the base end of the threaded portion 1. a hard shaft rod 4 which is integrally provided concentrically with the shaft rod 4; and a plastically deformable through-cylindrical lead pipe 5 which loosely fits into the shaft rod 4 and can abut at an intermediate position of the tapered portion 2. , a press having a nut 8 screwed onto the threaded portion 1 to press the lead pipe 5 in the direction of the tapered portion 2;