JP2006291496A - Water drain structure of hand-wash basin for flush toilet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water drain structure of a hand-wash basin for a flush toilet capable of preventing influence of fluctuation of pressure in a drain pipe accompanying with washing of a toilet stool. <P>SOLUTION: In this water drain structure of the hand-wash basin for flush toilet for connecting the drain pipe 3 of the hand-wash basin 2 attached to a side wall face of the toilet stool 1 with an excrement discharge pipe 4 of the toilet stool 1, a check valve device 8 is provided between a trap 7 provided in the drain pipe 3 of the hand-wash basin 2 and a connection part with the excrement discharge pipe 4, and such a check valve device in which a valve element 11 is opened by drain water from the hand-wash basin 2 and is not opened by negative pressure generated on an excrement discharge pipe 4 side is used as the check valve device 8. Since the valve element 11 of the check valve device 8 is not opened even when negative pressure is generated on the excrement discharge pipe 4 side of the drain pipe 3 in accordance with washing of the toilet stool 1, sound of air bubble flow does not occur, and bad smell does not leak by absorbing sealed water from the trap 5 of the hand-wash basin 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a drainage structure for a hand-washer attached to a side wall surface of a toilet in a flush toilet.

  Conventionally, in flush toilets, a wash tank has been installed behind the toilet bowl, and hands are washed with water falling from the water supply pipe to the wash tank. In order to improve efficiency, there are an increasing number of construction examples in which toilets that do not require a washing tank are installed and hand-washers are separately attached to the side wall of the toilet. In this case, the drain pipe of the hand-washer is connected to the filth drain pipe of the toilet bowl via a branch joint.

  However, in the drainage structure as described above, when flushing the toilet flushing water to the filth drainage pipe, the pressure in the drainage pipe of the handwasher fluctuates, and the sound of bubbles flowing into the trap seal water is generated, Occasionally, odor leaked due to suction to the filth exhaust side.

  Then, this invention makes it a subject to prevent the influence of the pressure fluctuation in the drainage pipe accompanying toilet bowl washing | cleaning in the drainage structure of the toilet bowl for flush toilets.

  In order to solve the above-mentioned problems, the present invention provides a drainage structure for a flush toilet in which a drain pipe of a hand-washer attached to a side wall of the toilet bowl is connected to a waste discharge pipe of the toilet bowl. A non-return valve device is interposed between the provided trap and the connection to the waste discharge pipe. As this check valve device, the valve element opens by drainage from the hand-washer and generates negative pressure on the waste discharge pipe side. Some of them did not open.

  In this drainage structure, the valve body of the check valve device is swung around the hinge shaft provided at the upper end, and as it swings, it comes into contact with and separates from the valve seat surface inclined upward. Then, when there is no drainage from the handwasher, the valve body closes by its own weight, so the structure can be simplified.

  In this case, if the check valve device is configured such that the valve body is attached to the insert inserted into the case and one end surface of the insert is a valve seat surface, the check valve device can be assembled. It becomes easy.

  In the drainage structure according to the present invention, as the toilet bowl is washed, even if negative pressure is generated on the filth drain side of the drain pipe of the hand-washer, the valve body of the check valve device does not open. It does not occur or the sealed water is sucked from the trap of the hand-washer and the odor does not leak, and the toilet room can be made a comfortable environment, and the drainage of the hand-washer is not hindered.

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

  As shown in FIG. 1, in this flush toilet, a Western-style toilet 1 that does not require a cleaning tank is installed, and a hand-washer 2 is separately attached to the side wall surface thereof. The drainage pipe 3 of the hand basin 2 is connected to the filth drain pipe 4 of the toilet 1 via a branch joint, and the drainage pipe 3 and the filth drain pipe 4 are cabinets along the wall surface of the toilet room in consideration of interior characteristics. 5 and 6 are covered.

  Inside the cabinets 5, 6, the drain pipe 3 is provided with a trap 7 on the hand-washer 2 side, and a check valve is provided at a gentle horizontal gradient portion between the trap 7 and the connecting part to the waste discharge pipe 4. A device 8 is interposed.

  As shown in FIGS. 2 and 3, the check valve device 8 includes a rectangular tube case 9 and an insertion body 10 as basic members, and a valve body 11 and a hinge shaft 12 at the upper end of the insertion body 10. A configuration in which one end face of the insert 10 is inclined upward, the insert 10 is inserted into the case 9, and the connector 13 is fixed to both ends of the case 9. Has been.

  The check valve device 8 and the drain pipe 3 are connected by screwing a nut 14 into the threaded portion of the connecting body 13 and the drain pipe 3.

  In the drainage structure provided with such a check valve device 8, when there is no drainage from the hand-washing device 2, the valve body 11 is closed by its own weight, and the waste pipe 4 of the drainage tube 3 is washed with the toilet 1. Even when negative pressure is generated on the side, the valve body 11 of the check valve device 8 is prevented from opening.

  Therefore, the flow sound of bubbles is not generated, the sealed water is sucked from the trap 5 and odor does not leak, and the toilet room can be made a comfortable environment.

  Further, when the faucet of the handwasher 2 is opened and the handwash water is allowed to flow to the drain pipe 3, the valve body 11 is opened by this water flow, and the handwash water is discharged to the filth drain pipe without any trouble.

  In addition, since the check valve device 8 has a simple structure, it can be easily assembled and maintenance can be easily performed when foreign matter is clogged.

The perspective view which shows the drainage structure of the hand-washing machine for flush toilets concerning this invention Exploded perspective view of the above check valve device Longitudinal sectional view showing the operating state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet 2 Hand basin 3 Drain pipe 4 Soil waste pipe 5, 6 Cabinet 7 Trap 8 Check valve device 9 Case 10 Insert 11 Valve body 12 Hinge shaft 13 Connector 14 Nut

Claims (3)

  A trap 7 provided in the drain pipe 3 of the hand-washer 2 in the drainage structure of the hand-washer for the flush toilet in which the drain pipe 3 of the hand-washer 2 attached to the side wall surface of the toilet 1 is connected to the filth drain pipe 4 of the toilet 1 A check valve device 8 is interposed between the sewage discharge pipe 4 and the connecting portion to the waste discharge pipe 4. As this check valve apparatus 8, the valve body 11 is opened by drainage from the hand-washer 2 and is generated on the waste discharge pipe 4 side. A drainage structure for a hand-washer for a flush toilet, which is not opened depending on the negative pressure.   In the drainage structure for a flush toilet according to claim 1, the valve body 11 of the check valve device 8 is swung around a hinge shaft 12 provided at an upper end portion, and is upwardly moved along with the swing. A drainage structure for a hand-washing basin for a flush toilet, characterized in that the valve seat surface is inclined toward and away from the toilet.   In the drainage structure of a flush toilet according to claim 2, the check valve device 8 is attached to the insert 10 inserted into the case 9 and the valve body 11 is attached to the end face of the insert 10. A drainage structure for a hand-washing basin for flush toilets, characterized in that it is configured as a valve seat surface.

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