JP2000319965A - Drain structure of bathroom unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain structure of a bathroom unit capable of preventing a backflow in a bathtub when draining a large quantity of water from a washing place and capable of preventing a backflow to a tub waterproof pan when draining a large quantity of water from the bathtub. SOLUTION: This drain structure of a bathroom unit drains water from a bathtub 1 and a tub waterproof pan 2 arranged under it. Then, the drain structure has a backflow preventive body part 20 for forming a tub drain hole 21 and a pan drain hole 22 for draining water from the bathtub 1 and draining water from the tub waterproof pan 2 and a blocking-up plate 30 installed on an under surface of this backflow preventive body part 20, capable of alternately closing the tub drain hole 21 and the pan drain hole 22 and always closing the tub drain hole 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage structure for a bathroom unit called a double pan type in which a tub waterproof pan is provided below a bathtub.

[0002]

2. Description of the Related Art As this type of drainage structure, as shown in FIGS. 7 and 8, a tub waterproof pan 2 is provided below a bathtub 1, and an elbow 4 is connected to a drain opening 3 of the tub waterproof pan 2. A conduit 5 is connected to the elbow 4, and the conduit 5 is connected to a trap 6. This trap 6 is provided in a drainage section 8 of a washing place 7. Also, a tub elbow 10 is connected to the drain opening 9 of the bathtub 1, and a hose 1 is connected to the elbow 10.
1 and an elbow 12 is connected to the hose 11. The elbow 4 has an L-shaped cylindrical shape, and a female screw 100 is formed in a receiving port, that is, an upper inner peripheral surface, and a male screw 102 of a flange 101 is screwed into the female screw 100. When the flange 101 is screwed into the elbow 4, the peripheral portion 3 </ b> A of the drain opening 3 of the tab waterproof pan 2 is sandwiched between the elbow 4 and the outer edge of the flange 101. A pipe 103 is connected to the elbow 12, and a lower end of the pipe 103 is inserted into a hole 101A of the flange 101. The diameter of the hole 101A is larger than the inner diameter of the pipe 103. An extension 104 is formed in the middle of the pipe 103 so as to project outward and fit into the flange 101, and a hole 104A for discharging water collected in the tub waterproof pan 2 is formed in the extension 104. ing. Below the overhanging plate 104 of the pipe 103 is provided a float 105 loosely fitted into the pipe 103, and when the water in the elbow 4 flows into the flange 101 from the hole 101A, the float 105
Are raised to close the hole 104A.

[0003]

The above-mentioned float 10
Although a device using a movable valve in place of 5 is also known, none of them has taken measures to prevent backflow into the bathtub.
For example, in a state in which the water stopcock is removed after cleaning the bathtub when a large amount of water is drained from the washing place, dirty water from which the washing place has been cleaned may flow back into the bathtub and stain the bathtub.

Accordingly, an object of the present invention is to provide a drainage structure of a bathroom unit which does not flow backward into a bathtub when a large amount of water is drained from a washing place, and does not flow back into a tub waterproof pan when a large amount of water is drained from a bathtub. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a drainage structure for a bathroom unit which drains water from a bathtub and a tub waterproof pan installed below the bathtub. A backflow prevention main body portion formed with a tab drainage hole for draining from the waterproof pan and a pan drainage hole, and a tab drainage hole and a pan drainage hole attached to the lower surface of the backflow prevention main body portion alternately. And a closing plate which can always close the drain hole for the tub.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in FIG. 1, drainage from the bathtub 1 (see FIG. 7) and the tub waterproof pan 2 installed thereunder are performed similarly to the prior art. A short cylindrical backflow prevention main body 20 having a tub drain hole 21 and a pan drain hole 22 for draining water from the tub is provided at the drain opening 3 of the tub waterproof pan 2. A closing plate 30 is attached to the lower surface of the backflow prevention main body 20. Bent portion 31 in the middle of this closing plate 30
Are swingably supported between a drain hole 21 for a tab and a drain hole 22 for a pan on the lower surface of the main body 20. Bending part 31
Thus, one portion of the closing plate 30 is formed heavier than the other portion, and this heavier portion is
A, and when the drainage pressure from the bathtub 1 is not applied, the closed portion 30B of the tub drainage hole 21 of a light portion
Are designed to close the drain hole 21 for the tab. An elbow 4 is connected to the lower side of the drainage opening 3, and a female screw 100 is formed on the inner peripheral surface of the upper part of the elbow 4.
The external thread 102 of the flange 101 is screwed into the pin 00. By screwing the flange 101 into the elbow 4, the peripheral portion 3 A of the drain opening 3 of the tab waterproof pan 2 becomes the elbow 4 and the outer edges 4 A, 101 B of the flange 101.
Sandwiched between. A packing 3B is provided at a position where the peripheral portion 3A is sandwiched to prevent water leakage from this position. Then, the backflow prevention main body 20 is fitted into the cylindrical flange 101. A seal packing 23 is provided on the outer periphery of the main body 20, and a flange 10 is provided.
1 is pressed against the inner peripheral surface. Hole 10 at the bottom of flange 101
The fact that 1A is formed is the same as in the prior art. The outer periphery of this hole 101A forms an inner edge 101C and receives the fitted main body 20. In the tub drain hole 21, drainage from the bathtub 1 is guided to the drainage opening of the bathtub 1 via a tub elbow 10 and a hose 11 as in the conventional case (see FIG. 7).

The elbow 4 is integrally formed up to a portion where the trap 6 is formed.
0 is provided. The water bottle 40 is provided in the drainage section 8 of the washing place 7.
It is provided in the place of. The location of this drainage part 8 is also the flange 2
01 is screwed into the inner peripheral surface of the upper opening of the trap 6, and the outer peripheral edge of the drain portion 8 of the washing place 7 is sandwiched (flange 10).
1). In FIG. 1, reference symbol M indicates a water sealing surface. Note that the elbow 4 and the trap 6 may not be formed integrally but may be formed separately and connected to each other by a pipe or the like.

FIG. 2 is a plan view of the backflow preventing main body 20, and shows a state in which the positions of the tab drain holes 21 and the pan drain holes 22 are reversed left and right from those shown in FIG. The drainage hole 21 for the tub is formed of one circular hole, and the drainage hole 22 for the bread is formed.
Is composed of a plurality of openings. In the illustrated example, a rectangular opening is formed in the center, semicircular openings are provided above and below the opening, and there is a partition between each opening. Because of this partition, discharge of large garbage can be prevented. The closing plate 30 swingably supports the bent portion 31 with a hinge 32. In a state in which water pressure is not applied to any of the closing portions 30A and 30B of the closing plate 30, since the closing portion 30A is formed heavier than the closing portion 30B as shown in FIG. With the fulcrum 31 as a fulcrum, the heavier one like a seesaw goes down and the closing part 30B rises to close the drainage hole 21 for the tub.

FIGS. 4 and 5 are simplified sectional views showing the operation of the closing plate 30. FIG. 4 shows a state in which the drainage of the tub waterproof pan 2 flows from the pan drainage hole 22 to the trap 6 side. Shows a state in which drainage from the bathtub 1 is performed. FIG. 5 shows a state where the closing portion 30B is pushed down by the water pressure from the bathtub and the closing portion 30A closes the drainage hole 22 for bread. When the water in the bathtub 1 is drained, the water pressure applied to the tub drainage hole 21 is higher than the water pressure applied to the tub drainage hole 22.
1 is opened, and the drainage of the water from the bathtub 1 is completed.
Since A is heavier than the closing portion 30B, the closing portion 30B rises to close the tub drain hole 21 and open the pan drain hole 22.

FIG. 6 is a plan view showing another example of the backflow preventing main body 20, in which the shape of the opening of the drainage hole 22 for bread is changed as compared with that shown in FIG. This opening has a narrower width than that of FIG. 2 and is formed in a slit shape, and the longitudinal direction of the slit-shaped opening is different from that of FIG. The slit-shaped opening constituting the bread drain hole 22 can prevent the discharge of finer dust than the opening in FIG.

[0012]

As described above, according to the present invention, there is provided a backflow prevention main body having a tub drain hole and a pan drain hole for draining water from a bathtub and draining water from a tub waterproof pan. There is a closing plate attached to the lower surface of the backflow prevention main body, which can alternately close the drain hole for the tab and the drain hole for the pan, and always closes the drain hole for the tab. Therefore, when water is accumulated in the bathtub, drainage from the tub waterproof pan is performed, and when further cleaning the bathtub and the washing place, a large amount of water is poured into the washing place after draining the water from the bathtub. In this case, there is no danger that this water will flow back into the bathtub. In addition, the backflow prevention body has a swinging part with a folded part of the closing plate with the middle part bent, and it is only necessary to attach this to the tub waterproof pan drainage opening, and the drainage structure of the bathroom unit can be simplified. Can be assembled. Further, since one portion of the closing plate is formed to be heavier than the other portion from the bent portion, it is possible to realize a very simple structure in which the tab drain hole is always closed. Furthermore, by forming the bread drainage hole from a plurality of openings instead of a single relatively large hole, it is possible to prevent discharge of dust larger than each of the openings.

Further, a trap is provided in a drainage part of the washing place,
Drainage from the elbow provided in the drainage opening of the tub waterproof pan is introduced into the trap, and the backflow prevention main body provided with the closing plate according to any one of claims 1 to 4 is attached to the receiving port of the elbow. In this case, in addition to the above-described effects, the height from the floor surface to the tab waterproof pan can be reduced, so that the bathroom space can be enlarged and barrier-free can be realized.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a preferred embodiment of the present invention.

FIG. 2 is a plan view of a backflow prevention main body.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a simplified sectional view showing a state of drainage from the tab waterproof pan.

FIG. 5 is a simplified sectional view showing a state of drainage from a bathtub.

FIG. 6 is a plan view showing another example of the backflow prevention main body.

FIG. 7 is a sectional view showing a conventional example.

FIG. 8 is a sectional view showing a drainage structure portion of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Tab waterproof pan 3 Drain opening 4 Elbow 6 Trap 7 Washing place 20 Backflow prevention main body part 21 Drain hole for tab 22 Drain hole for bread 30 Closure plate 31 Bent part 30A, 30B Closure part

Claims (6)

[Claims] 1. A drainage structure for a bathroom unit for draining water from a bathtub and a tub waterproof pan installed below the tub, wherein a tub drainage hole and a drainage for the pan for draining the bathtub and the tub waterproof pan are provided. A backflow prevention main body having a hole formed therein, and a tab drainage hole and a pan drainage hole attached to the lower surface of the backflow prevention main body can be alternately closed so that the tab drainage hole is always closed. A drainage structure for a bathroom unit, comprising: a plate; 2. The drainage structure for a bathroom unit according to claim 1, wherein the closing plate is bent at an intermediate portion, and the bent portion is swingably supported on a lower surface of the main body. 3. The drainage structure for a bathroom unit according to claim 2, wherein one portion of the closing plate from the bent portion is formed heavier than the other portion. 4. A portion of the heavy side which is divided into two by the bent portion of the blocking plate serves as a blocking portion of the drainage hole for bread, and the other portion of the lighter side in a state where drainage pressure from the bathtub is not applied. The drainage structure for a bathroom unit according to claim 3, wherein the closing portion of the tub drainage hole closes the tub drainage hole. 5. The drainage structure for a bathroom unit according to claim 1, wherein the drainage hole for bread comprises a plurality of openings. 6. A trap is provided in a drainage part of a washing place, and drainage from an elbow provided in a drainage opening of a tub waterproof pan is introduced into the trap, and a trap is provided in a receiving port of the elbow. A drainage structure for a bathroom unit, comprising a backflow prevention main body provided with the above-mentioned closing plate.