Abstract: A tacker having an anti-double firing devise for a single firing mode has developed comprising: a connector (100?) for linearly moving back and forth along an ejection guide (4) when the tacker is depressed or released on a work target, a detent (100a?) formed a tiny rectangular shaped cutout at proximal end of the connector (100?), a firing control plate (94) for pushing a piston valve rod (12) by its stroke into a cylinder of an operating unit (10) according to the movement of the connector (100?), and an anti-double firing controller (102) forming an index-finger shape with slightly bent finger tip, which has a flat top surface and a rounded-tip lower surface for easily engaging or disengaging to the detent (100a?). The anti-double firing controller (102) is latched into the detent (100a?) soon after a firing for preventing subsequent misfiring on the same target due to a repulsion of the connector (100?) for a single firing mode.

Abstract: A tacker with anti-double firing means has a guide installed at the front end of a body, a cover installed at the rear end of the body and having a compressed air controlling member, a handle grip and a trigger installed at the lower end of the body, a magazine installed under the guide and filled with tacker pins, and a pushing plate installed in the trigger for pressing a valve rod for operating a piston. The anti-double firing means comprises a connector installed in the guide such that the connector moves back and forth, and having a notch formed such that the upper end of an anti-double firing plate is inserted into the notch in a single firing mode; and the anti-double firing plate separated from the pushing plate, connected to the pushing plate, and restraining the connector from moving backward due to the repulsive force of the connector.