Toilet bowl flushing water tank device

Abstract

The present invention provides a toilet bowl flushing water tank device which can prevent the easy increase of a supply quantity of flushing water to a toilet bowl exceeding a predetermined quantity. The present invention provides a toilet bowl flushing water tank device which includes: a flushing water tank for storing flushing water to be supplied to a toilet bowl and forming a discharge outlet which communicates with the toilet bowl in a bottom portion thereof; a discharge valve for opening / closing the discharge outlet; a manipulation portion for performing a pull-up operation of the discharge valves a connection member for connecting the manipulation portion and the discharge valve; and a float mounted on the connection member in a state that the connection member is allowed to pass through the float and generating buoyancy for maintaining a valve-open state of the discharge valve in a state that the float is immersed in the flushing water, wherein the connection member includes an upper engaging portion and a lower engaging portion for restricting a movable range of the float on the connection member, and at least the lower engaging portion includes a lower irreversible engaging jig having physical irreversibility which prevents the removal of the lower engaging portion from the connection member unless the lower irreversible engaging jig is broken.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a toilet bowl flushing water tank device having a float generating buoyancy for maintaining a valve-open state of a discharge valve in a state that the float is immersed in flushing water.[0003]2. Background Art[0004]Conventionally, there has been known a toilet bowl flushing water tank device which includes a flushing water tank for storing flushing water to be supplied to a toilet bowl, a discharge outlet communicating with a flushing water supply passage which is formed in a bottom portion of the flushing water tank and communicates with the toilet bowl, a discharge valve for opening / closing the discharge outlet, a manipulation portion for performing a pull-up operation of the discharge valve, a connection member for connecting the manipulation portion and the discharge valve, and a float mounted on the connection member in a state that the connection member is allowed to pass through...

AI Technical Summary

Benefits of technology

[0008]Accordingly, it is an object of the present invention to provide a toilet bowl flushing water tank device which can overcome the above-mentioned drawback.

[0009](1) To achieve the above-mentioned object, according to one aspect of the present invention, there is provided a toilet bowl flushing water tank device which includes: a flushing water tank for storing flushing water to be supplied to a toilet bowl ad forming a discharge outlet which communicates with the toilet bowl in a bottom portion thereof; a discharge valve for opening / closing the discharge outlet; a manipulation portion for performing a pull-up operation of the discharge valve; a connection member for connecting the manipulation portion and the discharge valve; and a float mounted on the connection member in a state that the connection member is allowed to pass through the float and generating buoyancy for maintaining a valve-open state of the discharge valve in a state that the float is immersed in the flushing water, wherein the connection member includes an upper engaging portion and a lower engaging portion for restricting a movable range of the float on the connection member, and at least the lower engaging portion includes a lower irreversible engaging jig having physical irreversibility thus preventing the removal of the lower engaging portion from the connection member unless broken.

[0010](2) In the toilet bowl flushing water tank device having the above-mentioned constitution (1), the upper engaging portion includes an upper irreversible engaging jig having physical irreversibility which prevents the removal of the upper engaging portion from the connection member unless broken and / or an upper reversible engaging jig having physical reversibility which allows a change of a movable range of the float due to detachable mounting of the float on the connection member.

[0015]According to the present invention, the connection member includes the upper engaging portion and the lower engaging portion for restricting the movable range of the float on the connection member, and at least the lower engaging portion includes the having physical irreversibility which prevents the removal of the lower engaging portion from the connection member unless the lower irreversible engaging jig is broken. Due to such a constitution, for example, a user or the like can no longer increase a supply quantity of flushing water which is properly determined corresponding to a toilet bowl by arbitrarily lowering a position of the float and hence, it is possible to prevent the wasteful discharge of flushing water in advance.

Problems solved by technology

However, the toilet bowl flushing water tank device described in patent document 1 allows anybody to simply change the position of the float and hence, for example, when the float is lowered and arranged at a lower position, the supply quantity of flushing water is excessively increased thus leading to the wasteful discharge of flushing water.

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