JPS6313495B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drainage device for a bathtub, and more particularly to a drainage device for a bathtub of the type in which two bathtubs are integrally connected and each bathtub has its own drain port.

Conventionally, various structures have been known as drainage devices for aquariums, and a typical one is the one developed in 1973.
There is a method published in Publication No. 51158, which drains water from two drain ports and an overflow hole with one collection trap, so if water from two aquariums is drained at the same time, Both tanks are connected through a collection trap, and especially if the water levels in both tanks are different, water from the higher water tank may flow into the lower water tank and pollute the lower water tank. Also, since the water from all the tanks flows into one collecting trap, it is easy to get clogged and the drainage capacity is extremely reduced, and if one tank is empty, the waste water from the other tank will flow into the empty tank. This may contaminate the inside of the empty aquarium.

It is an object of the present invention to solve the above-mentioned problems and to prevent water drained from one bathtub from flowing into the other bathtub, thereby preventing the bathtub from becoming dirty.

The basic structure of the present invention is to prevent the two bathtubs from communicating with each other on the drain side by providing traps corresponding to the drain ports of two adjacent bathtubs.

Hereinafter, the present invention will be explained in detail based on illustrated embodiments.

The drawing shows a bathtub as an example of a water tank.

In the figure, A is a bathtub body in which two bathtubs 1 and 2 are integrally connected. For example, the bathtub 1 is used as a bathtub, and the water tank 2 is used for washing the body or taking a bath, but the use is not limited to this example.

The two bathtubs 1 and 2 are provided with drain ports 3 and 4 on their bottom surfaces, respectively, and are connected to each other through a common upper edge surface 5 at the upper ends of the adjacent side walls 1a and 2a, and between the side walls 1a and 2a. A space 6 is formed below the upper edge surface 5.

The above-mentioned common upper edge surface portion 5 is formed slightly lower than the upper surface of the bathtubs 1 and 2, and cut-out recesses 7 of appropriate lengths are provided at appropriate locations to span the two adjacent bathtubs 1 and 2. An overflow hole 8 is bored in the center of the bottom of the recess 7, and this bottom is connected to each bathtub 1,
It is inclined downward from the second side toward the overflow hole 8.

9 is a lid of the recess 7, which is formed into a roughly shaped cross section;
Locking steps 1 provided on the wall surfaces of both lengthwise ends of the recess 7
0 to fit and lock both ends and cover the recess 7.

The lid 9 has a clearance 11 between its lower end and the bottom of the recess 7, and a locking step 10.
A suitable fixing means 12 is used to easily attach and detach the lid 9.
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The drain ports 3, 4 of the bathtubs 1, 2 and the overflow holes 8 formed in the recesses 7 of the upper edge surface 5 are provided with drainage devices 13, 13', 13'', respectively.

The drain devices 13, 13', 13'' each consist of a short cylindrical main body 13a having a flange at one end, and a sub-body 13b screwed onto the main body 13a. Screw the secondary body 13b onto the main body 13a inserted into the main body 13a from the back side of the bathtub body A via a gasket, and then connect the drain ports 3, 4,
It is fastened to the bathtub body A around the overflow hole 8.

And drainage equipment 13, 13' for drain ports 3, 4
are connected directly or via suitable connecting pipes 14 to traps 15, 15', respectively, and the drainage device 13'' of the overflow hole 8 is connected to a communication line extending in the space 6 below the upper edge surface 5. The secondary body 13b of the drain device 13 of one drain port 3 is connected via the pipe 16.
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That is, the secondary body 13 of the drain device 13 of this drain port 3
b is formed into a substantially T-shaped trifurcated tube shape, and one of the openings located at opposing positions is connected to the main body 1 of the drainage device 13.
3 a and the other end are connected to the connecting pipe 14 , and the opening located perpendicularly to these openings is connected to the downstream end of the connecting pipe 16 which communicates with the overflow hole 8 .

Traps 15 and 15' each overturn the drainage channel a.
It is formed to be bent into a letter shape, and its downstream end communicates with a drain pipe (not shown).

The traps 15, 15' may be formed by one member, or may be formed by connecting a plurality of members as in the illustrated example. Also traps 15, 15'
As mentioned above, there is no need to use a so-called S trap in which the drainage channel a is bent into an inverted S-shape, but depending on the position of the drain pipe, the drainage channel a may be bent into a substantially inverted P-shape. It is also optional to use a so-called P-trap. Any other structure may be used as long as it has the function of a trap.

In the figure, reference numeral 17 is a constriction portion for restricting the amount of water discharged, and is formed to have an inner diameter smaller than the inner diameter of the flow path of the trap 15'. Reference numeral 18 indicates plugs for the drain ports 3 and 4. The function of this constriction part 17 will be explained as follows.
When water is stored in the bathtub 2 and used, if the plug 18 of the drain port 4 is removed to lower the water level, the water level of the bathtub 2 is lowered, and the plug 18 is reconnected to the drain port 4.
Due to the siphon action, the water flowing forcefully inside the trap 15' is transferred to the drain port 4.
By closing the trap 18 with the stopper 18, a negative pressure is created in the flow path between the drain port 4 and the inflow side of the trap 15'.

To eliminate this negative pressure, the water in the trap 15' flows backwards, and the force of the water causes the stopper 18 to come off the drain port 4, causing water to flow out from the drain port 4, causing the water to flow out of the bathtub 2. It is not possible to raise the water level to the desired height. However, in the present invention, since the drain device 13' is provided with a constricted portion 17 having an inner diameter smaller than the inner diameter of the channel of the trap 15',
As the amount of water flowing through trap 5' decreases and the siphoning force within trap 15' becomes weaker,
The generation of negative pressure as described above can be prevented, and the plug 18 will not come off from the drain port 4.

FIG. 3 shows another embodiment of the present invention, in which the plug 18 of the drain port 4 is removed, the drain ports 3, 4, and the overflow hole 8 are removed.
A strainer 19 having several holes in the axial direction is attached to the trap 15, 15' to prevent foreign matter such as hair from getting stuck in the trap 15, 15'.

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

Since we have provided a trap that corresponds to each of the drains of two adjacent bathtubs, it is possible to connect the drains of two bathtubs at the trap part, similar to the conventional method of connecting the drains of two bathtubs to one collective trap. They do not communicate with each other, so even if the water in the high water level bathtub and the low water level bathtub are drained at the same time, the water in the high water level bathtub will flow into the low water level bathtub, and the water in the low water level bathtub will flow into the low water level bathtub. There is no risk of problems such as contamination.

The water drained from each bathtub passes through its own trap, so unlike those using conventional collecting traps, the water from the two bathtubs may all flow into one trap, causing the trap to become clogged or Drainage water from one bathtub does not flow into the other bathtub and pollute the other bathtub due to the drainage capacity being extremely reduced due to clogging.

An overflow hole was provided at the bottom of the recess between the two bathtubs, and a drainage device was attached to this overflow hole to connect it to the upstream side of one of the traps. Compared to a structure in which an overflow hole is provided and a drainage device is attached to the overflow hole, the number of overflow holes is small, and the installation of the drainage device is easy and inexpensive.

The upper edge surface that connects the upper sides of the adjacent side walls of the two bathtubs is located at a slightly lower level than the top of the bathtub, so overflow water does not leak out of the bathtub and flows into the overflow hole, and the drain installed in the overflow hole also flows into the overflow hole. The device will not protrude upward and injure the user's hand.

[Brief explanation of the drawing]

The drawings show an embodiment of the drainage device for a bathtub according to the present invention, in which Fig. 1 is a plan view, Fig. 2 is a partially cutaway enlarged vertical sectional view taken along the line xx in Fig. 1, and Fig. 3 is a different embodiment. It is a partially cutaway enlarged longitudinal cross-sectional view of an example. 1, 2... Bathtub, 1a, 2a... Side wall, 3, 4
... Drain port, 5 ... Upper edge surface, 7 ... Recess, 8 ...
...Overflow hole, 13, 13', 13''... Drainage device, 15, 15'... Trap.

Claims (1)

[Claims] 1. A recess connecting the upper sides of adjacent side walls of two bathtubs, each having a drain port, to form an upper edge surface slightly lower than the top surface of the bathtub, and connecting the two bathtubs to the upper edge surface. An overflow hole is provided in the bottom of the recess, a drainage device is attached to the two drain ports, and the drainage device is connected to each of the two downstream traps, and the overflow hole is provided in the bottom of the recess. A drainage device for a bathtub, in which a drainage device installed in the hole and a drainage device on one of the drain ports are connected via a connecting pipe.