JPS5930071Y2 - drain plug - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improvements in drain plugs used in bathtubs, sinks, washstands, etc.

Conventionally, this type of drain plug has become widely used in place of drain plugs formed by casting due to its cost, ease of manufacture, mass production, etc., and is usually made of metal plates such as stainless steel plates. It was manufactured by insert molding a single piece of heat-resistant plastic.

However, as shown in FIG. 1 as a conventional example, the metal plate 1 is fixed to the flange portion 7 of the drain plug body 5 only by bending 3, and the metal plate 1 cannot be detached from the drain plug body 5 in the vertical direction. However, there is no structure to prevent horizontal rotation, and as the plastic deteriorates, the adhesion of the plastic to the metal plate 1 deteriorates, and the metal plate 1 is used when installing the drain plug A and when using the drain plug A. It also has the disadvantage that it rotates at times and easily comes off from the drain plug main body 5.

The present invention aims to eliminate the above-mentioned drawbacks and provide a drain plug in which the metal plate covering the drain plug body does not rotate or come off from the drain plug body during installation and use. be.

A detailed description will be given below based on drawings shown as examples.

In Fig. 2, reference numeral 1 is a circular metal plate with a through hole of an appropriate diameter bored in the center, the outer periphery is bent downward and towards the inner surface 3, and the inner periphery is inclined inward. It has a trapezoidal cone-shaped body 2 integrally, and a protrusion 4 is provided on the back surface by pressing a proper position on the body 2.

The bends 3 are used to allow plastic to enter when molding the drain plug body 5 out of plastic, and to improve the adhesion between the metal plate 1 and the drain plug body 5.

In addition, in the example shown in FIG. 2, the protrusion 4 is provided at an appropriate position on the back surface of the body 2, but a concave portion may be provided, or both concave and convex portions may be provided, and the position of the convex portion 4 may be determined separately. It may be provided on the back surface of the upper surface of the metal plate 1 as shown in FIG. 5 as an example.

Drain plug A is obtained by molding plastic into a predetermined mold using the above structure and metal plate 1 as an embedded fitting. FIG. 3 is a perspective view of the drain plug A, and FIG. 4 is a cross-sectional view. The drain plug main body 5 is formed by integrally forming the cylindrical portion 6 and the flange portion 7 horizontally protruding outward from the upper edge of the cylindrical portion 6, and the flange portion 7 of the drain plug main body 5 is , covered with a metal plate 1.

Further, the cylindrical body portion 6 is provided with a thread groove 8 for attaching a fastening fitting.

As described above, a plastic drain plug body is formed by integrally forming a cylindrical body portion and a flange portion projecting outward and horizontally on the upper edge of the cylindrical body portion, and the flange portion of the drain plug body This is a drain plug whose part is covered with a metal plate, and the back side of the metal plate is provided with a recessed part, a convex part, or an uneven part, so that the metal plate and the main body of the drain plug are integrally formed. During installation and use, a portion of the drain plug body bites into the protrusion provided on the back of the metal plate, so the metal plate will not rotate and come off the drain plug body.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the main parts of a conventional example, Fig. 2 is a plan view and front view of the metal plate, Fig. 3 is a perspective view of the drain plug according to the present invention, and Fig. 4 is a main part of the drain plug. FIG. 5 is a sectional view of a main part showing another embodiment. 1...metal plate, 2...body, 4...
...Protrusion, 5...Drain plug body, 6...
・Cylinder part, 7... Flange part, A...
Drain plug.

Claims (1)

[Scope of utility model registration request] A plastic drain plug body is formed by integrally forming a cylindrical body portion and a flange portion projecting horizontally outward on the upper edge of the cylindrical body portion, and the flange portion of the drain plug body is covered with a metal plate. 1. A drain plug comprising a metal plate and a drain plug main body integrally formed by providing a concave portion, a convex portion, or both concave and convex portions on the back surface of the metal plate.