| 摘要 |
PURPOSE:To make it possible to stop the rotary structure at a desired angle of rotation and to release the structure from its stop position easily by a method wherein claw members are fixed to the rotary structure and stop members engageable with the claw members, respectively, are pivotally attached to a base plate. CONSTITUTION:In order to prevent the claw member 14 from running against the stop member 20 at the time of clockwise rotation of the rotary structure 12, a rod 32 releasing the claw member 14 is fixed to a part above the claw member 14 and in front of the rotational direction of the claw member. As the rod 32 engages a pin 33 of an arm 23 of the stop member 20, the stop member 20 is moved against the force of a coil spring 26 fixed to the shaft 24 of the stop member 20 through the pin 33 in accordance with the rotation of the rotary structure 12. The same thing can be said when the rotary structure 12 rotates in the counter-clockwise direction. The claw members 14 and 15 and the stop members 20 and 21 are separated from each other in the vertical direction and in order to allow the rotary structure 12 to rotate continuously, the stop members 20 and 21 may be transferred to their respective positions in which they do not come into engagement with the claw members 14 and 15 so that they are held by releasing rods 42, respectively. |
