JPH0619607Y2 - Pipe cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is to be fitted to an end of a pipe used for supporting structures such as guardrails and plants.
The present invention relates to a pipe cap that prevents rainwater and the like from entering the pipe.

(Prior Art) In general, a pipe used for a structure such as a guardrail has an end covered with a metal cap so that rainwater and the like do not enter the inside. This cap usually had a tubular shape with one end closed, and was welded or screwed to the end of the pipe.

(Problems to be solved by the invention) By the way, there is a problem in that when the cap is attached to the end of the pipe by welding, the attachment is extremely troublesome. Especially, when the pipe needs to be filled with concrete at the time of construction, the cap has to be welded to the pipe on the spot, and the above problem becomes more remarkable.

On the other hand, when the cap is screwed to the end portion of the pipe, a male screw must be formed on the outer peripheral surface of the end portion of the pipe, which causes a problem of increasing the number of pipe processing steps. Further, when the cap is attached to the end portion of the pipe, the cap has to be rotated many times, and there is a drawback that it takes time to attach the cap. Further, when the cap is of the screw type, it can be easily removed, so that it may be stolen when it is made of an expensive material such as copper or brass.

The present invention was devised to solve the above problems, and an object thereof is to provide a pipe cap that can be easily and firmly attached to the end of the pipe.

(Means for Solving the Problem) A pipe cap according to the present invention, which has solved this problem, has a bottomed cylindrical cap body having an outer peripheral wall that is fitted onto the end of the pipe, and is fixed to the inside of the cap body. It consists of a metal sheet metal fitting. The locking tool has a ring-shaped clearance sufficient to insert the end of the pipe between the locking tool body and the outer peripheral wall of the cap body, and the locking tool body and the locking tool body A plurality of locking pieces protruding from the peripheral edge portion to the annular gap are provided. Therefore, the protruding length of each locking piece is
The distance between the tip of the locking piece and the outer peripheral wall of the cap body is set to be smaller than the wall thickness of the pipe.

(Operation) The cap is pushed into the pipe while the outer peripheral wall of the cap body is fitted onto the end of the pipe. That is, the end portion of the pipe is relatively pushed into the annular gap between the outer peripheral wall of the cap body and the locking tool body.

At this time, a plurality of locking pieces are projected from the peripheral edge of the locking tool body into the annular gap, and the distance between the tip of each locking piece and the outer peripheral wall is set smaller than the wall thickness of the pipe. Therefore, each locking piece is pushed into the pipe while being deformed in the direction opposite to the cap pushing direction by the inner peripheral surface of the pipe as the cap is pushed into the pipe. As a result, when the cap is finally attached to the end of the pipe, the tip of each locking piece engages in pressure contact with the inner peripheral surface of the pipe in a state where it is free to bite in the direction in which the cap separates from the pipe. Will be combined (see FIG. 4).

Therefore, the cap is firmly attached in a state in which it is prevented from being pulled out from the pipe by the biting action of the locking piece to the inner peripheral surface of the pipe.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show a pipe cap according to an embodiment of the present invention, in which the cap has a cylindrical cap body 1 closed at one end and a substantially dish shape provided in the cap body 1. And a locking tool 2 of

The cap body 1 is made of a metal material having excellent corrosion resistance and the like, and is connected to the outer peripheral wall 1a and a cylindrical outer peripheral wall 1a fitted to the outer peripheral surface of the end portion of the pipe 3, And a lid portion 1b covering the end surface of

The locking tool 2 is made of a metal material having excellent corrosion resistance and the like, is provided in the cap body 1, and has a pipe 3
Is provided with a plurality of locking pieces 2a.

Specifically, as shown in FIG. 3, the locking tool 2 includes a disk-shaped bottom wall 2b, and a peripheral wall 2c that is vertically connected to the bottom wall 2b.
It is composed of a plurality of substantially trapezoidal locking pieces 2a that are vertically connected to the peripheral wall 2c outwardly, and each locking piece 2a is arranged in an annular shape, and its tip portion is of the pipe 3. It is formed in an arc shape along the inner peripheral surface.

The locking tool 2 is attached to the back surface side of the lid 1b of the cap body 1 via a stud 4 so that its axis matches the axis of the cap body 1, and the outer peripheral wall 1a of the cap body 1 is attached. An annular gap 5 sufficient to insert the end portion of the pipe 3 is formed between and the peripheral wall 2c serving as the locking tool body. Each locking piece 2a is an outer peripheral wall 1a of the cap body 1.
It is arranged in a state of facing the inner peripheral surface and at a constant interval from the inner peripheral surface.

The length L of each locking piece 2a of the locking tool 2 is determined by the tip portion of each locking piece 2a and the inner circumference of the outer peripheral wall 1a of the cap body 1 when the locking tool 2 is attached to the cap body 1. The distance l from the surface is set to be slightly smaller than the wall thickness of the pipe 3. Further, the thickness of each locking piece 2a is such that when each end of the pipe 3 enters the annular gap 5, the respective locking piece 2a has a thickness of 3 mm.
It is set so that it can be bent slightly.

Then, the cap body 1 is fitted into the end of the pipe 3,
When the cap body 1 is press-fitted into the pipe 3 side in this state,
The tip portion of the pipe 3 enters into the gap between the inner peripheral surface of the outer peripheral wall 1a of the cap body 1 and each locking piece 2a of the locking tool 2.
At this time, each locking piece 2a is slightly bent by the pipe 3 toward the lid portion 1b side of the cap body 1 as shown in FIG. 4, and the tip portion thereof is locked to the inner peripheral surface of the pipe 3.

Therefore, the cap is prevented from coming off the pipe 3. In particular, since each locking piece 2a is slightly bent toward the lid portion 1b, when the cap 3 is pulled out from the pipe 3, the tip end of each locking piece 2a bites into the inner peripheral surface of the pipe 3, The cap becomes more difficult to come off from the pipe 3.

In the above embodiment, the locking body 2a of the locking tool 2 is
Although it is arranged to be continuously and annularly connected to the peripheral wall 2c, in another embodiment, the locking pieces 2a are provided at regular intervals.
You may make it connect to c.

Further, in the above embodiment, each locking piece 2a is formed in a substantially trapezoidal shape, and the tip end portion thereof is formed into an arc shape along the inner peripheral surface of the pipe 3, but in other embodiments, The locking piece 2a may have a triangular shape.

Further, in the above embodiment, the locking tool 2 is attached to the inside of the cap body 1 by the tack 4, but in other embodiments, the locking tool 2 is spot welded or the like. It may be installed inside.

(Effect of the Invention) As described above, the pipe cap of the present invention is locked in the inner peripheral surface of the pipe when it is fitted into the end portion of the pipe in the tubular cap body whose one end is closed. Since the locking tool including the plurality of locking pieces is provided, each locking piece is locked to the inner peripheral surface of the pipe when the cap is fitted to the end of the pipe. As a result, the cap is prevented from coming off from the end of the pipe, and is securely and firmly attached to the end of the pipe. In particular, once the cap is attached to the pipe, each locking piece bites into the inner peripheral surface of the pipe in the direction of pulling out the cap, making it impossible to easily remove the cap from the pipe, resulting in mischief or theft. It is possible to reliably prevent the pipe end from being exposed.

Further, when attaching the cap to the end of the pipe, it is only necessary to press fit the cap to the end of the pipe, and there is no need to weld the cap to the end of the pipe or turn the cap many times as in the conventional case. It is extremely easy and easy to attach the cap to the end.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a pipe cap according to an embodiment of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of a cap fastener, and FIG. It is a partial longitudinal cross-sectional view of the mounted state. 1 ... Cap body, 1a ... Outer wall, 2 ... Locking tool,
2a ... Locking piece, 2c ... Peripheral wall (locking tool body), 3 ...
Pipe, 5 ... Annular gap, L ... Projection length of locking piece, l
...... Gap between the tip of the locking piece and the outer peripheral wall of the cap body.

Claims (1)

[Scope of utility model registration request] 1. A bottomed cylindrical cap body (1) having an outer peripheral wall (1a) externally fitted to an end of a pipe (3), and a metal plate member fixed in the cap body (1). Stop (2)
The locking tool (2) has an annular gap (5) sufficient to insert the end of the pipe (3) between the outer peripheral wall (1a) of the cap body (1), The outer peripheral wall (1a)
And a plurality of locking pieces (2a) projecting from the peripheral edge of the locking tool body (2c) into the annular gap (5). The protrusion length (L) of each locking piece (2a) is determined so that the distance (l) between the tip of the locking piece (2a) and the outer peripheral wall (1a) is the pipe (3).
A pipe cap characterized by being set to be smaller than the wall thickness of.