JPH0419172Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a cap mounting structure for protecting the end of a pipe-like crosspiece used for gates, fences, grids, etc.

Prior Art When attaching this type of cap to a pipe-shaped crosspiece, screwing the legs of the crosspiece and the cap to integrate them is disclosed in Japanese Utility Model Publication No. 51-26506 and Japanese Utility Model Application Publication No. 1983-1999.
It is widely known as disclosed in Publication No. 74385 and the like.

However, when a screw hole is formed on one side of the crosspiece or in the leg of a cap and the screw is inserted in a blind state, the through hole in the crosspiece or cap should be made thicker than the screw to facilitate insertion of the screw. As a result, there is a play gap between the screws after installation and the through holes in the crosspiece or cap, resulting in drawbacks such as rainwater entering the inside of the pipe-like crosspiece and the cap rattling.

Furthermore, in Japanese Utility Model Publication No. 60-6129, a cap is inserted into the end of a pipe-shaped crosspiece made of aluminum molded material and has a tapping hole, and a screw inserted through the lid of the cap is screwed into the tapping hole. The attached mounting structure is shown.

However, according to this invention, the lid and legs of the cap had to fit into a complex shape made of molded aluminum material, so the cap could not be mass-produced at low cost. This not only degraded the aesthetic appearance of the threaded parts, but also caused problems such as rainwater accumulating and premature rusting.

Problems to be solved by the invention This invention enables the mass production of metal caps at low cost, and also makes it possible to mass-produce metal caps for square pipe-shaped crosspieces.
It has been improved so that it can be applied in a solid and completely watertight state.

Means for solving the problem Aluminum with parallel protrusions formed at the lower positions slightly inward from both the front and rear sides of the plate-shaped body, and legs with tapping holes at the lower ends at the central lower position. The molded material is cut to a predetermined size, and both ends of the protrusion and legs of the cut aluminum molded material are cut off to form a cap having a lid and legs, and the cap is projected onto the tube end of a square pipe-shaped crosspiece. The intended purpose was achieved by inserting the pieces inwardly and inserting the screws inserted from the side of the crosspiece into the tapping holes.

Function According to this invention, a tapping hole is provided at the lower end of the leg of the cap, and a screw inserted from the side of the square pipe-shaped crosspiece is screwed into the tapping hole. Since plastic deformation occurs when the screw is press-fitted, it is not necessary to strictly align the axes of the tapping hole and the screw. There is no need to provide any clearance to the end of the square pipe-shaped crosspiece by slightly lowering the axis of the screw inserted from one side of the crosspiece to the tapping hole of the cap. On the other hand, an internal stress is generated that pulls the lid of the cap downward, thereby making the cap rigid and completely watertight.

Example The mounting structure of the crosspiece cap shown in the drawing is for a square pipe-shaped crosspiece used as a vertical girder for a gate, and is made by extrusion of aluminum so that the crosspiece cap is mounted slightly inward from both the front and rear sides of the plate-like main body. An aluminum molded material having parallel protrusions 3, 3 formed at the lower position and a leg 5 having a tapping hole 4 at the lower end at the lower central position is made, and this is cut to a predetermined size. Both ends of the protruding pieces 3, 3 and the legs 5 of the aluminum molded material are cut off to form a cap 1 having a lid part 6 and leg parts 5, and this is attached to the tube end of the square pipe-shaped crosspiece 2. A stainless steel screw 8 inserted through a through hole 7 formed on the side of the crosspiece 2 is screwed into the tapping hole 4 and fixed.

Effects of the invention According to this invention, mass production of caps becomes possible,
The cap is made with a parallel protrusion in contact with the end of the square pipe-shaped crosspiece, and the periphery of the lid is in contact with the pipe end of the crosspiece, so there is no problem of rainwater entering the inside of the crosspiece. Completely avoided.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an example of the proposed mounting structure in an unfolded state, Fig. 2 is a vertical cross-sectional view of the main parts in an assembled state, and Fig. 3 is a front view of a gate equipped with the proposed mounting structure. 1 is the cap, 2 is the crosspiece, 3 is the protrusion,
4 is the tapping hole, 5 is the leg part, 6 is the lid part, 8
represents a screw.

Claims (1)

[Scope of utility model registration request] A square pipe-shaped cap is formed by forming a parallel protruding piece at a lower position slightly inward from both the front and rear sides of the lid part, and forming a leg part having a tapping hole at the lower end at a lower position between both protruding pieces. A mounting structure for a crosspiece cap, characterized in that the projecting piece of the cap is inscribed and inserted into the tube end of the crosspiece, and a screw inserted from the side of the crosspiece is screwed into a tapping hole.