JPS6020702Y2 - drainage device - Google Patents

Description

[Detailed description of the invention] This invention consists of a sink, a water storage tank, and 1. The present invention relates to a drainage device installed at a drainage outlet of a washbasin, bathtub, etc.

Conventionally, this type of drainage device has a drain port a as shown in Figure 6.
A gasket C' having a U-shaped cross section was interposed between the drain fitting b' and the drain fitting b' to seal the space between the two.

However, if the material that constitutes the drain port a' is enamel, the surface cannot be formed smoothly due to unevenness in the glaze, etc., and even if U packing C' is used, it cannot be completely sealed. A leak had occurred.

The object of the present invention is to eliminate the above-mentioned drawbacks and completely seal the drain port to prevent water leakage, no matter what material it is made of.

The basic structure of the present invention is that the gasket interposed between the lower surface of the drain outlet and the fastener is formed to have an abbreviated cross-section, and a close contact portion that comes into close contact with the drain fitting is provided. and between the drain fitting and the packing, and sealing between the lower surface of the drain port and the drain fitting with an integrated packing.

In other words, the present invention relates to a drainage device in which a gasket is interposed and brought into close contact with the lower surface of the drain outlet, which can easily be smoothed, and the drain fitting without interfering with the uneven drain outlet a.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

This embodiment shows a case where a drain port a is opened in a cast iron enamel sink A as shown in FIGS. 1 and 2. A drain fitting is fitted inward and screwed into place from the back side of the drain port a with a fastener d via a gasket C.

The drain fitting is formed of a metal, for example, stainless steel flange 1 which is annularly formed at the upper end along the drain port a, and a synthetic resin can body 2 which is integrally provided below the flange 1.

The flange 1 forms an arc-shaped tapered surface 3 whose diameter gradually decreases toward the bottom, and its outer periphery is in contact with the upper surface of the drain port a, and the lower end of its inner periphery is provided with a net for storing garbage, etc. A stepped portion 5 is formed to removably lock the basket 4.

The can body 2 is formed in a cylindrical shape with a closed bottom surface, and has a threaded portion 6 formed on the upper outer periphery and a drain hole 8 communicating with a drain pipe 7 formed in the bottom surface.

The fastener d is a cap nut having a brim-like flange portion 9 at its upper end, and has a screw 10 carved into its inner circumferential surface to be screwed into the screw portion 6 of the drain fitting.

The gasket C is made of an elastic material such as rubber and has a cross-sectional annular shape, and has a protrusion 12 protruding from the upper surface of the horizontal portion 11 that extends around the entire circumference and comes into contact with the lower surface of the drain port a. The upper half of the portion 13 is formed so as to become gradually thinner as it goes upward, and the close contact portion 14 is formed on the inner periphery thereof.

Therefore, with the horizontal part 11 of the seal C interposed between the lower surface of the drain port a and the flange part 9 of the fastener d, tighten the fastener d upward along the threaded part 6 of the drain fitting. If so,
The protrusions 12 formed on the horizontal portion 11 are crushed and brought into close contact, completely sealing between the lower surface of the drain port a and the fastener d, and
The upright part 13 deforms outward along the tapered surface 3 of the drain fitting, and in particular, the close contact part 14 comes into close contact with the tapered surface 3 to completely seal between the drain fitting and the seal C.

The one shown in FIGS. 4 and 5 is another embodiment, in which the flange 1 of the drain fitting is formed with an inverted cross section, and the upright portion 13 of the seal C is directed outward as it goes upward. The upper surface is provided with a double protrusion 1 which extends over the entire circumference and abuts the lower outer circumferential surface of the flange 1 inwardly and outwardly.
5 to form a close contact portion 14.

Therefore, when the fastener d is tightened, the protrusion 12 of the horizontal part 11 comes into contact with the lower surface of the drain port a, and at the same time, the contact part 14 formed on the upper surface of the upright part 13 closes with the flange part 1. The protrusions 15, which are double provided inside and outside in contact with the lower surface of the outer periphery, are deformed along the shape of the flange part 1 by collapsing or otherwise coming into close contact, thereby completely sealing between the drain fitting and the seal C.

Incidentally, in the above-mentioned embodiment, in order to use the drain fitting for the sink A, the drain fitting is formed of the flange part 1 and the can part 2, and the mesh basket 4 is housed inside thereof, but the present invention is not limited to this. Without,
For example, the flange portion 1 and the can portion 2 of the drain fitting may be made of the same material.

Therefore, in such a drainage device, the surface of the drain port a is not smooth, and even if water flows into the space between the drain port a and the drain fitting, there will be problems between the drain fitting and the seal C, and between the bottom surface of the drain port a and the fastener. Since I sealed the space between it and d, water won't leak from there.

Since the present invention has the above configuration, it has the following advantages.

■ Sealing is done between the bottom surface of the drain and the fastener, and between the drain fitting and the packing, so water will not leak even if the surface of the drain is not smooth.

Therefore, no matter what material the drain port is made of, it is completely sealed and no water leaks.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the drainage device of the present invention installed in a sink, Fig. 2 is a vertical cross-sectional view, Fig. 3 is a perspective view of the packing, partially cut away, and Figs. 4 and 5. The figure shows another embodiment, and FIG. 6 is a sectional view showing a conventional drainage device. a... Drain port, b... Drain fitting, C.
...Putskin, d...Tightening tool, 14...
...close contact area.

Claims (1)

[Scope of utility model registration request] A drain fitting that fits into the drain, a fastener that screws onto the drain fitting from the back side of the drain to fix the drain fitting to the drain, and an annular packing that is interposed between the underside of the drain and the fastener. The drainage device is characterized in that the gasket is formed to have an abbreviated cross-section and has a close contact portion that comes into close contact with the drainage fitting.