JPS61124798A - Connecting piece - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[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 thoracotomy 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.

Conventional locking pieces are as shown in Figure 1 (the part that locks or comes into close contact with the pipe or hole is a rubber ring (mu), the rubber ring (A) is inserted into the rubber ring (A), and The clamping metal fitting (D) screwed into the threaded part (C) which has a clamping seat plate (B) on its head is compressed from the front and back direction and expands.In this case, the clamping metal fitting (DJ is the rubber ring (A
) to maintain its expanded state.

8. Therefore, even if it is necessary to remove the clamping metal fitting (DJ) in the conventional locking piece, if the clamping metal fitting (D) is removed, the rubber ring (A) will return to its original state, so it will maintain its expanded state. Alternatively, the clamping metal fitting CD) could not be removed to maintain the lock.

In view of the above, the present inventor has invented a locking piece in which the expanded portion of the locking piece can be locked to a pipe or hole even if the clamping metal fitting is removed, and the present invention also relates to this invention. The purpose is to provide such a locking piece.

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) has a tapered part (2) that gradually widens toward the front which should be provided at the tip of the threaded part (1), and a reverse threaded part (3) which should be provided at the base end of the threaded part (1). It is made of a harder metal than the lead pipe (5) that is attached to the back and the rear.

The inner surface of the lead pipe (5) gradually expands toward the front 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 this lead pipe (5) in the direction of the tapered portion (2) is made of the same material as the shaft rod (4),
Also, a pressing fitting (7) that should be provided at the rear of the lead pipe (5) and a nut that should press this pressing fitting (7) in the direction of the lead pipe (5), with an inner diameter and an outer diameter that are approximately the same as the rear end surface of the lead pipe (5). (8), the press fitting (7) is loosely fitted onto the shaft (4), and the nut (8) is screwed into the threaded portion (1).

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

The tool not shown to operate this invention is the reverse screw part (3).
It is suitable to have an inner shaft into which the tip is screwed, and an outer cylinder into which the inner shaft is fitted and whose tip is fitted into the nut (8).

First, after connecting the locking piece of the present invention to the tool according to the above 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 the press fitting (7
) and first comes into contact with the intermediate position of the tapered portion (2).

As is obvious, the tapered portion (2) beyond this contact position
The diameter of the lead pipe (5) is larger than that of the lead pipe (5). Therefore, Natsuto (
8), the lead pipe (5) will reach the tapered part (2).
), the lead pipe (5) is compressed from the front and rear by the tapered part (2) and the nut (8), and is layered in an expanded state on the surface of the tapered part (2). obtain. This state becomes the state of expansion and expansion of the maximum diameter. In this way it is inside the tube. In other words, the lead pipe (5) once expanded in the hole is not held in expansion by the press fitting (7) or nut (8), and even if these are removed, it will not return to its original state. do not have.

Note that the drawing symbol (8) is 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 with long-term use, but with the locking piece of the present invention, the quality would not change. The locking effect can be sufficiently maintained in long-term use. In particular, if the object to be locked is metal, the locking is stronger than with conventional rubber rings. In addition, the expansion state inside the pipe is determined by the press fitting (7).
Alternatively, since there is no change even if the nut (8) is removed, for example, remove the reverse threaded part (3) and cut the threaded part (1) in the middle, and use the remaining threaded part (1) to expand. By providing a separate backing on the rear end of the lead pipe (5) and tightening it with a separate cap that can be screwed onto the threaded part (1), the mouth of the pipe can be completely closed. It is also possible to prevent fluid below the locking arm from leaking out of the tube.

In addition, even if the pressing fitting (7) and nut (8), which are the pressing means (6), are removed, the water inside the faucet pipe remains in a stopped state. Rust removal work can be carried out, and the irrational problems such as the trouble of removing the conventional locking piece once after the water is stopped and the inability to perform rust removal work with the water stopped are solved.

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, there is no need to use any pressing means to maintain the expansion 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 work can be carried out simply and quickly if removed.

[Brief explanation of the drawing]

Figure 1 is a conventional locking piece, Figure 1 is an exploded front view of the present invention,
FIG. 3 is a usage example diagram showing an expanded state. (1)--Screw part (2)...Tapered part (3)...
・Reverse thread part (4)・・e-axis rod (5)・@-lead pipe (6
)・■Press means

Claims (1)

[Claims] 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) at the base end of the threaded portion (1) are integrally molded. A hard shaft rod (4) made of a solid shaft (4), a lead pipe (5) that loosely fits into this shaft rod (4) and can be brought into contact with the tapered portion (2) at an intermediate position, and this lead pipe (5). A locking piece comprising a pressing means (6) to press in the direction of the tapered portion (2).