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.

1 . A toilet bowl flushing water tank device comprising:
 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 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 which prevents the removal of the lower irreversible engaging jig from the connection member unless the lower irreversible engaging jig is broken.   
   
   
       2 . A toilet bowl flushing water tank device according to  claim 1 , wherein 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. 
   
   
       3 . A toilet bowl flushing water tank device according to  claim 2 , wherein the upper engaging portion includes the upper irreversible engaging jig and the upper reversible engaging jig, the upper irreversible engaging jig is arranged in a spaced-apart manner from the float, and the upper reversible engaging jig is mounted between the upper irreversible engaging jig and the float. 
   
   
       4 . A toilet bowl flushing water tank device according to  claim 1 , wherein the lower engaging portion includes the lower irreversible engaging jig and a lower 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, the lower irreversible engaging jig is arranged in a spaced-apart manner from the float, and the lower reversible engaging jig is mounted between the lower irreversible engaging jig and the float. 
   
   
       5 . A toilet bowl flushing water tank device according to  claim 1 , wherein a recessed portion which allows the connection member to pass therethrough is formed in a center portion of the float, and the lower irreversible engaging jig and/or the upper irreversible engaging jig is/are accommodated in the recessed portion. 
   
   
       6 . A toilet bowl flushing water tank device according to  claim 5 , wherein only the lower irreversible engaging jig is arranged in the recessed portion, and the upper reversible engaging jig formed with a diameter larger than a diameter of the lower irreversible engaging jig is mounted in a state that the upper reversible engaging jig is brought into contact with an upper surface of the float.