Patent ID: 7559727

Claim:
A tapping device, comprising: a tap holder, provided in a vertically movable shank body which can be freely attached to a rotating mold indexing device rotatably provided at a punch press, the tap holder having a tap at a lower end and being provided so as to be movable in a vertical direction and urged upwards; a downward movement transmitter which receives and transmits a downward motion of a ram provided at the punch press so as to be movable in the vertical direction to the tap holder, the downward movement transmitter being at an upper part of the shank body, and the downward motion of the ram, which is received by the downward movement transmitter, is transmitted to the upper part of the shank body; and an elastic member positioned within a space provided in the shank body, the elastic member extending between a bottom of the space and an upper end of the tap holder so as to urge the tap holder upwards.