JPH0248529Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an overflow device configured to prevent overflow from a bathtub.

[Conventional technology]

Traditionally, the overflow device for bathtubs was developed in 1973.
As described in Publication No. 53311, the drain valve at the bottom of the bathtub is opened and closed by operating a handle provided in the overflow hole, and the inside of the drain pipe is used as a channel for discharging overflow water, and the drain pipe is used as a channel for discharging overflow water. Use only as
Some models have a structure in which the drain valve can be opened and closed directly by hand.

As shown in FIG. 4, in the latter case, an elbow-shaped main body 52 that passes through a mounting opening 51 in a side wall 50 of the bathtub is fixed to the side wall 50 of the bathtub with a tightening flange 58, and this main body 52 has a main body 52 that extends along the outer wall of the bathtub. A drain pipe 53 communicating with a drain main pipe (not shown) is connected thereto.

Furthermore, a cover 54 having a substantially U-shaped cross section is installed on the inside of the bathtub to hide the opening of the main body 52.
2 with screws 55, a notch 56 provided in the lower half of the cover 54 is formed as an overflow channel, and the back surface 57 of this cover 54 is tightly attached to the side wall 50 to prevent fingertips etc. from getting caught. It is configured to allow

[Problem that the invention attempts to solve]

In a bathtub equipped with such an overflow device as described above, hot water flows down from the notch 56 of the cover 54 through the main body 52 to the drain pipe 53 so as not to overflow outside the bathtub as the water level rises during bathing.

However, when a person suddenly gets into the bathtub, the water level rises quickly, and the notch 56 inside the cover 54 is isolated from the outside world by hot water, so the body 5
It is not possible to remove the air that has accumulated between the two parts.

Therefore, even if the area of the flow path is increased, the accumulated air becomes an obstacle to the discharge of hot water, and the amount of water discharged cannot follow a sudden rise in the water level, resulting in the problem that hot water overflows outside the bathtub.

The purpose of this invention is to provide an overflow system for bathtubs.
To enable smooth drainage of hot water without overflowing even when the water level suddenly increases.

[Means and actions for solving problems]

The present invention connects a cover whose back abuts against the side wall of the bathtub to a main body that is fixed through the upper side wall of the bathtub and communicates with the drainage channel, and a notch is formed in the back of the cover to drain overflow water. In this overflow device, an opening for air venting is provided at the upper end of the cover, and as the water level rises, air in the overflow channel downstream of the cover is discharged from this opening.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a sectional view of the overflow device according to the present invention, and FIG. 2 is a view taken along the - line in FIG. 1.

Overflow drainage device A is similar to that described in the conventional example,
One end portion of the main body 1 is inserted into a mounting opening 31 provided in a side wall 30 of a bathtub B, and is fixed by a tightening flange 3 via a packing 2.

The main body 1 has an elbow shape, and the other end is connected to a drain pipe 4 that runs along the outer wall of the bathtub, and the lower end of this drain pipe 4 is disposed at the bottom 21 of the bathtub B. A drain connection pipe 20
is connected to.

The bottom 21 of the bathtub B is connected to the upper end of the drain connection pipe 20.
This drain valve seat 22 is opened and closed by a drain valve body 23 to discharge water in the bathtub to a drain main pipe 24.

At the end of the main body 1 located inside the side wall 30, a stay 5 is formed in the diametrical direction as shown in FIG. 2, and a female screw hole 6 is provided at the center position.

Reference numeral 7 denotes a cover connected to the main body 1 by a mounting screw 8 screwed into a female screw hole 6, which has a bowl-like shape with a substantially U-shaped cross section, and has a lower half position as shown in the perspective view of FIG. A notch 9 is formed in the back of the holder, and a rectangular hole 10 through which the mounting screw 8 is inserted is provided in the center.

Reference numeral 11 denotes an opening for air vent cut out at the top end of the back of the cover 7. When the cover 7 is connected to the main body 1, the opening 11 forms a gap with the side wall 30, and as the water level rises, the cover 7 The air trapped inside can be discharged. The opening 11 may have a notch shape on the back side of the cover 7, or may have a hole 11a at the uppermost end.

Reference numeral 25 is a chain having one end connected to the cover 7 and the other end connected to the drain valve body 23, which is used to separate the drain valve body 23 from the drain valve seat 22 and drain water by hand.

In the above configuration, when the water level in the bathtub B rises, hot water flows into the main body 1 from the notch 9 provided in the lower half of the cover 7, passes through the drain pipe 4 and the drain connection pipe 20, and flows into the drain main pipe 24. It is possible to prevent overflow to the outside of bathtub B.

At this time, the notch 9 is closed by hot water due to the rise in the water level, but the space downstream from the inside of the cover 7 is maintained in communication with the outside through the open part 11 provided at the top end of the cover 7. .

Therefore, even if the water level rises rapidly, the air remaining in the cover 7 and the main body 1 is forcibly discharged from the opening 11 in a state where it is compressed by the inflow of water. By discharging this accumulated air, the hot water flowing in all at once can smoothly flow into the drain pipe 4 and can be drained without stagnation, etc., and overflowing of the hot water to the outside of the bathtub B can be prevented.

Furthermore, even if the water level rises above the opening 11, the hot water is discharged from the opening 11 and is discharged together with the above-mentioned retained air.

[Effect of idea]

The bathtub overflow device according to the present invention has the following effects due to its configuration.

Since the air in the drainage channel can be discharged as the water level rises, overflow water can be drained smoothly without air being trapped in the drainage channel, and even if the water level suddenly increases, the hot water will not flow out of the bathtub. This can prevent overflow.

Overflow capacity can be improved with a simple structure of just providing an opening in the cover.
Can be manufactured cheaply.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the overflow drainage system according to the present invention, Fig. 2 is a view taken along the - line in Fig. 1, Fig. 3 is a perspective view seen from the back side of the cover, and Fig. 4 is a conventional structure. It is a sectional view of the main part. 1...Body, 2...Packskin, 3...Tightening flange, 4...Drain pipe, 5...Stay, 6...Female screw hole, 7...Cover, 8...Mounting screw, 9...
...notch, 10...hole, 11...opening, 30...
Side wall, 31...Installation port, A...Overflow drainage device, B
...bathtub.

Claims (1)

[Scope of utility model registration request] A main body that penetrates and fixes the upper side wall of the bathtub;
A drain pipe located outside the bathtub and connected to the main body;
a cover that is located inside the bathtub and is integrated with the main body and has a substantially U-shaped cross section with its back abutting the side wall of the bathtub; a notch for a drainage channel is provided between the lower half of the cover and the side wall; What is claimed is: 1. An overflow and drainage device for a bathtub, characterized in that an opening for venting air is formed in the upper end portion of the cover.