Patent ID: 8389833

Claim:
An upright piano type action comprising: a wippen which moves upward and downward in a response to depression and release of a key; a jack which is supported by the wippen so as to swing; a butt which is raised by the jack to swing; a swinging shank which extends from the butt; a swinging member which is supported by an edge of the swinging shank to perform a hitting activity in accordance with a swing of the butt; a swing-urging member which is coupled to either the butt or a swinging member which swings in synchronization with the butt to apply an urging force which acts in a swinging direction for hitting; a catcher shank which extends from the butt; a catcher which is supported by an edge of the catcher shank such that the catcher is received by a backcheck at the time of recovery from the hitting; and a weight attached to a moving member, the moving member being at least any one of the butt, the swinging shank, the swinging member, the catcher, and the catcher shank, wherein the weight is placed such that, in a state where the key is not being depressed, a load of the weight acts in a direction opposite to the swinging direction of the moving member to which the weight is attached.