Water discharge valve device and flush water tank device with same

Abstract

The present water discharge valve device (28) is provided with: a water discharge valve unit (58) provided with a valve element (84) for opening and closing a water discharge opening (22a) and also with a control tube (76) for controlling the ascending and descending motions of the valve element; and a tube body (62) provided with a side wall (90b), an opening section (90c), and a switching valve (56), the side wall (90b) extending upward from the bottom surface of a water storage tank (22) so as to surround both the water discharge opening and the control tube of the water discharge valve unit and having an open upper end, the opening section (90c) being formed so as to penetrate through the side wall, and the switching valve (56) being attached to the side wall so that the switching valve (56) can open and close the opening section. A communication opening (82) for connecting the tube body and the water discharge opening is formed in a side surface which extends from the control tube of the water discharge valve unit to the water discharge opening. The opening section of the tube body is disposed at the same height as or below the upper end of the communication opening.

Description

technical field [0001] The present invention relates to a drain valve device and a cleansing water tank device provided with the same, and more particularly to a drain valve device of a cleansing water tank for storing cleansing water for cleaning toilets and a cleansing water tank device provided with the device. Background technique [0002] Conventionally, the following devices are known as a drain valve device of a flush water tank for storing flush water for flushing toilets and a flush water tank device equipped with the device. A cylinder body is provided in the way of the drain port and the drain valve for opening and closing the drain port, an opening is formed on the side of the cylinder body, and a valve body for opening and closing the opening of the cylinder body is provided at the same time. [0003] In the drain valve device of such a conventional cleansing water tank and the cleansing water tank device equipped with the device, when performing a large cleansi...

AI Technical Summary

Problems solved by technology

[0006] Therefore, when the valve body of the drain valve is opened by such washing water, the valve body of the drain valve acts on the downward pressure, so the drain valve closes early with the flow of the washing water, and there is a problem that remains in the washing water tank after the drain valve closes the drain port. The water level (dead water level) of the cleaning water inside is not uniform

[0007] In addition, in order to suppress such premature closing of the drain valve, for example, it is necessary to take measures such as enlarging the buoy of the drain valve so that a large buoyancy acts on the drain valve, but there is also a problem that the overall size of the drain valve device tends to increase.

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