JPS581536Y2 - bent joint - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bending joint in which a soft elastic band 3 is attached in the circumferential direction to the inner periphery of a corner portion 2 of a bending joint body 1 made of hard synthetic resin.

With conventional curved joints used to connect eaves gutters at an angle, the eaves gutters and curved joints themselves expand and contract due to changes in outside temperature, causing stress to concentrate at the corners of the curved joints. There was a problem in that cracks formed in the corners, causing rain to accumulate, and as a result, if cracks occurred, they would need to be replaced immediately.

The present invention solves such conventional problems, and aims to provide a bending joint that does not cause rain to accumulate even if cracks occur in the corner portion of the bending joint body.

The present invention will be explained in detail below based on the illustrated embodiments.

As shown in Fig. 1, the bending joint body 1 is integrally molded from hard synthetic resin such as hard vinyl chloride resin, and has a corner part 2 bent at an appropriate angle in the middle, and eaves gutters at both ends. A joint ear 4 is formed to fit with the ear portion of the connector.

As shown in FIG. 2a, the corner portion 2 is formed to curve inward in order to absorb thermal expansion and contraction of the connecting eaves gutter and the bending joint body 1 itself through elastic deformation.

A soft elastic band 3 made of rubber or soft synthetic resin is attached to the inner periphery of the corner portion 2 by simultaneous molding with the bending joint body 1 or by adhesive.

In the bending joint with the above configuration, if the connected eaves gutter or the bending joint main body 1 expands and contracts thermally, and thermal stress concentrates on the corner part 2 and cracks 5 occur, the soft elastic band 3 as shown in Figure 2 expands and closes the crack 5, preventing rain from seeping through the crack 5.

As mentioned above, in this invention, a soft elastic band is pasted in the circumferential direction on the inner periphery of the corner part of the bending joint body made of hard synthetic resin. The corner areas where cracks are likely to occur and are concentrated are made up of two layers of soft elastic bands.For this reason, even if a crack occurs at the corner of the bending joint body, the soft elastic band stretches to close the crack and prevent the crack from occurring. This has the advantage that there is no need to replace it immediately when cracks occur, unlike conventional methods, and since the soft elastic band is located on the inner periphery of the corner, the appearance at the time of construction is improved. It has the same advantages as the conventional one.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 ab is an explanatory view of the same operation. In the figure, 1 is the bent joint body, 2 is the corner part, and 3 is the soft elastic band.

Claims (1)

[Scope of utility model registration request] A bending joint made of hard synthetic resin with a soft elastic band attached circumferentially to the inner periphery of the corner of the bending joint body.