Patent ID: 9033189
Filing Date: 2015-05-19
Classification: B05B,B05C,E04F

Abstract:
1. A dripping prevention apparatus in a sealer gun that on a base side of a body in a cylindrical shape of which tip side is equipped with a discharge cylinder configured to discharge a liquid material, a holding unit is provided, and a grip member capable to be gripped together with the holding unit is axially supported so as to pivot to a position along the holding unit by gripping and to pivot to a position separate from the holding unit with a resilient spring by releasing a grip, an inside of the body accommodates therein a valve mechanism configured to control disconnection and establishment of communication between an introduction pipe side and a tip side of the discharge cylinder, and operation of opening valve and closing valve of the valve mechanism is interlocked to pivoting motion of the grip member so as to open a valve resulting from pivoting of the grip member by gripping, and to stop a discharge of a liquid material from a tip aperture of a nozzle of a tip of the discharge cylinder by closing the valve resulting from resilient pivoting of the grip member by releasing a grip, wherein a pump that includes a cylinder and a piston fitting in the cylinder in a manner capable to move in and out freely is assembled onto the body, an operation rod interlocked with the piston of the pump and the grip member are interlocked via an interlock mechanism so as to perform pump operation of suction and discharge by moving in and out the piston caused by resilient pivoting of the grip member, and a suction-discharge aperture of the pump is positioned in an internal space of the nozzle on the tip side of the discharge cylinder, and when a discharge of a liquid material is stopped by releasing the grip member, a negative or positive pressure is to be introduced into an inside of the nozzle caused by pump operation resulting from resilient pivoting of the grip member.