| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a door closer with assistance which can energize a momentum assisting force to open a door, and which can immediately stop application of a momentum assisting force when door-opening operation is stopped. <P>SOLUTION: The door closer with assistance is provided with a sun gear, a fixed plate, a planetary gear, a pusher, a detection means, an electromagnetic clutch, and a motor. The sun gear is fixed to a drive shaft 13 which is provided to a door closer body 11, and the fixed plate fixed to the door 17 has a curved groove which is provided along the outer periphery of the sun gear. Then the planetary gear is supported by one end of a mobile shaft which penetrates the curved groove, and is engaged with the sun gear. The pusher moves as the planetary gear moves, and the detection means detects the movement of the pusher, and sends out an ON/OFF signal. Then the electromagnetic clutch, which is provided to the end of the drive shaft 13, is brought into a connected state by an ON signal of the detection means. The motor fixed to the fixed plate is driven by the ON signal of the detection means and applies a momentum-assisting turning force to the drive shaft 13 through the medium of the electromagnetic clutch. <P>COPYRIGHT: (C)2008,JPO&INPIT |
