| 摘要 |
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.
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