PURPOSE: To raise the quality and yield of products as well as prevent maloperations by a method in which a cam and a spring are provided to a slider to push a movable clamp, and a mechanism to lock an operating lever at a given time by detecting the condition between fixed and movable clamps is also provided.
CONSTITUTION: A movable clamp 3 is slid toward a fixed clamp 2, a heater 20 is contacted with pipes P1 and P2, and when a lever 57 is raised, a micro switch is turned on and a slider 51 is locked. When the lever 57 is further pulled up, since the pressing force of the clamp 3 is doubled through the spring by the action of the cam, joints S1 and S2 are heated and melted. After the heating of a given time t1, the pressing force is released, and then the heater is quickly removed to a waiting position because the clutch is turned off when the pipes are heated and melted for the time t2 while being slightly touched by the heater. The melted faces S1 and S2 are contacted with each other, and when the lever 57 is pulled up, the pipes are pushed mutually. After they are bonded for a given time t3, the lever is returned to release its pressing force, but when the time t3 is not reached or is passed, the pressing force is not released.
AZUMA JIROU
IKENAKA YOSHIHARU
