JPH0746688Y2 - Fence support cap mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a cap mounting structure suitable for mounting a stainless steel strut and a cap.

<Prior Art> In the conventional cap mounting structure, a regular steel strut and a cap are fitted together and fixed by electric welding or caulking.

Further, for example, as described in Japanese Utility Model Laid-Open No. 60-14062, an engaging concave portion is formed on the outer peripheral surface of a column, a notched inward claw piece is formed on a cap, and the claw piece is formed into the concave portion. A technique of elastically press-fitting into the is also known.

<Problems to be solved by the invention> However, since the stainless steel cap is not painted, there is a problem that discoloration at the time of welding deteriorates the appearance as it is, or a dent of caulking deteriorates the appearance.

Further, even in the technique of the above publication, there is a problem that the notch of the cap impairs the appearance.

Therefore, an object of the present invention is to provide a cap mounting structure that does not use welding or caulking and has an excellent appearance.

<Means for Solving the Problems> The means for solving the problems according to the present invention is, as shown in FIGS. 1, 2, and 3, in a cap mounting structure in which a cap B is fitted and fixed to the upper end of a cylindrical support A, the cap B is It is composed of a cap body 1 that covers the upper end of the column A, a bulging portion 2 that is integrally formed on the outer periphery of the body 1, and a retaining ring C that is built in the bulging portion 2.

The retaining ring C includes a vertical ring 3, a plurality of elastic biting pieces 4 connected in a horizontal direction from the vertical ring, and a notch 5 for increasing the elasticity of the elastic biting pieces 4. The inner diameter D1 of the elastic bite piece 4 is set to be slightly smaller than the outer diameter D2 of the column A, and the inner end portion 4a of the elastic bite piece 4 is formed into a concave ring groove 6 formed on the outer peripheral surface of the upper end portion of the column A. Is fitted to.

<Operation> In the above means for solving the problem, an assembling method of the cap B and the strut A will be described with reference to FIG. 2. The upper end portion of the strut A is covered with the cap B including the retaining ring C, and the cap B is attached to the strut A. Forcibly push it in until it hits the top edge of. Then, as shown by the phantom line in FIG. 1, since the inner diameter D1 of the elastic biting piece 4 of the retaining ring C is smaller than the outer diameter D2 of the outer peripheral surface of the column A, the elastic biting piece 4 is elastically deformed. Reaching the concave ring groove 6 of the column A, the inner end portion 4a of the elastic bite piece 4 is fitted into the concave ring groove 6 and the cap B is fixed to the column A in a non-pullable manner.

<Embodiment> An embodiment of the cap mounting structure of the present invention will be described below with reference to the drawings.

[First Embodiment: Embodiment of Claim 1 of the Present Invention] First, a first embodiment will be described with reference to FIGS. 1, 2, and 3. This is a stainless steel (or steel plate) cylindrical support A. In a cap mounting structure in which a stainless steel (or steel plate) cap B is fitted and fixed to the upper end (for example, a thickness of 1.5 to 3.2 mm), the cap B is a cap body 1 (for example, a thickness 1.5m
m) and the bulging portion 2 integrally formed on the outer periphery of the main body 1.
And a retaining ring C (thickness 0.8 mm) made of metal (or plastic) built in the bulging portion 2.

The retaining ring C is composed of a vertical ring 3, a plurality of elastic bite pieces 4 connected horizontally from the lower end of the vertical ring 3, and a notch 5 for increasing the elasticity of the elastic bite piece 4. .

Further, the inner diameter D1 of the elastic bite piece 4 is set to be slightly smaller than the outer diameter D2 of the column A, and the inner diameter of the lower flange 2a of the bulging portion 2 is set.
D3 is set to be the same as or slightly larger than the outer diameter D2 of the column A,
The inner end portion 4a of the elastic biting piece 4 is fitted in a concave ring groove 6 which is recessed in the outer peripheral surface of the upper end portion of the column A.

Next, the method of manufacturing the cap B will be described.
As shown in the figure, the material of the cap body 1 is pressed and deep-drawn to form a dome shape with a cylindrical outer peripheral portion 2b.
B1 is molded, and then the retaining ring C is inserted into this semi-finished product B1. Next, the outer peripheral lower end portion 2c of the semi-finished product B1 is squeezed from the outside to the inside to form the bulging portion 2 bulging outwardly as shown in FIG. At this time, the upper and lower edges 3a, 3b of the vertical ring 3 of the retaining ring C contact the inner surface of the bulging portion 2 and the lower flange 2a is located below the elastic biting piece 4 of the retaining ring C. Therefore, the retaining ring C does not fall off the cap B.

The method of assembling the cap B and the strut A will be described with reference to FIG. 2. The upper end of the strut A is covered with the cap B having the retaining ring C built therein, and the assembling apparatus is operated to attach the cap B to the strut A. Forcibly push it in until it hits the top edge. Then, as shown by the phantom line in FIG. 1, since the inner diameter D1 of the elastic biting piece 4 of the retaining ring C is smaller than the outer diameter D2 of the outer peripheral surface of the column A, the elastic biting piece 4 is elastically deformed. Reaching the concave ring groove 6 of the column A, the inner end portion 4a of the elastic bite piece 4 is fitted into the concave ring groove 6 and the cap B is fixed to the column A in a non-pullable manner.

At this time, since the elastic biting piece 4 of the retaining ring C is fitted into the concave ring groove 6 in a slightly elastically deformed state, the cap B does not move along the outer peripheral surface of the support column A even if an unexpected external force is applied. Does not rotate.

[Second Embodiment: Embodiment of Claim 2 of the Present Invention] Next, a second embodiment of the cap mounting structure of the present invention will be described with reference to FIGS. 5 and 6, and in this embodiment, the elastic biting piece 4 will be described. The inner end portion 4a is bite into the uneven outer peripheral surface 7 of the pillar A.
Others are the same as those in the first embodiment.

An example of the outer peripheral surface 7 of the pillar A is an uneven outer peripheral surface that is satinized. Further, the elastic biting piece 4 is formed to have a sharp end so as to easily bite.

[Third Embodiment: Embodiment of Claim 3 of the Present Invention] FIG. 7 shows a third embodiment, in which the material of the elastic biting piece 4 is made significantly harder than the material of the support A, and the support A
The outer peripheral surface 7 is a smooth outer peripheral surface, and the tip of the elastic biting piece 4 bites into the outer peripheral surface 7 of the column A to prevent the cap B from coming off. The other structure is the same as that of the second embodiment.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

<Effect of the Invention> As is apparent from the above description, according to claims 1, 2, and 3 of the present invention, when the cap and the retaining ring are covered on the upper end of the column and forcedly pushed, the cap is built into the cap body. The inner end of the elastic biting piece of the retaining ring fits into the concave ring groove or bites into the outer peripheral surface of the column, so that the cap is fixed to the column in a non-removable manner.

Therefore, regardless of whether the cap is made of stainless steel or another material, the separate retaining ring can be made of a hard and elastic material, so that the cap is fixed without welding or caulking. In addition, there is an excellent effect that the cap can be attached to the column by an extremely simple work without discoloration or dent of the cap impairing the appearance.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of the cap mounting structure of the present invention in an assembled state, FIG. 2 is a longitudinal sectional view of the column and the cap in a separated state, FIG. 3 is a cutaway plan view of the same portion, and FIG. FIG. 5 is a vertical sectional view of a semi-finished product in the manufacturing process of the cap, FIG. 5 is a vertical sectional view of an assembled state of a second embodiment of the present invention, FIG. 6 is a cutaway plan view of the same portion, and FIG. 7 is a third embodiment of the present invention. FIG. 5 is a vertical cross-sectional view of the assembled state. A: Cylindrical support, B: Cap, C: Stop ring, D1: Inner diameter of elastic bite piece, D2: Outer diameter of support, 1: Cap body, 2: Swelling part, 3: Vertical ring, 4: Elastic Biting piece 4a: Inner end of elastic biting piece,
5: notch, 6: concave ring groove, 7: outer peripheral surface.

Claims (3)

[Scope of utility model registration request] 1. A cap mounting structure in which a cap is fitted and fixed to the upper end of a cylindrical column, wherein the cap includes a cap main body that covers the upper end of the column, and a bulge portion integrally formed on the outer periphery of the main body. The retaining ring is built in the bulging portion, and the retaining ring increases the elasticity of the vertical ring, a plurality of elastic bite pieces connected in the horizontal direction from the vertical ring, and the elastic bite piece. The inner diameter of the elastic biting piece is set to be slightly smaller than the outer diameter of the column, and the inner end of the elastic biting piece is a concave ring groove formed in the outer peripheral surface of the upper end of the column. A cap mounting structure characterized by being fitted. 2. A cap mounting structure in which a cap is fitted and fixed to an upper end of a cylindrical support, the cap includes a cap main body that covers the upper end of the support, and a bulging portion integrally formed on the outer periphery of the main body. The retaining ring is built in the bulging portion, and the retaining ring increases the elasticity of the vertical ring, a plurality of elastic bite pieces connected horizontally from the vertical ring, and the elastic bite pieces. A cap characterized in that the elastic bite piece has an inner diameter slightly smaller than the outer diameter of the column, and the inner end of the elastic bite bites into the uneven outer peripheral surface of the column. Mounting structure. 3. A cap attachment structure in which a cap is fitted and fixed to an upper end of a cylindrical column, wherein the cap includes a cap main body that covers the upper end of the column, and a bulge portion integrally formed on the outer periphery of the main body. The retaining ring is built in the bulging portion, and the retaining ring increases the elasticity of the vertical ring, a plurality of elastic bite pieces connected horizontally from the vertical ring, and the elastic bite pieces. A cutout portion, the inner diameter of the elastic biting piece is set to be slightly smaller than the outer diameter of the column, the material of the elastic biting piece is set to be harder than the material of the column, and the inner end portion of the elastic biting piece is formed. Is a cap mounting structure characterized by being bitten into the outer peripheral surface of the column.