| 摘要 |
PURPOSE:To always press a horn against a body to be inspected with constant pressure by allowing a mobile body to displace in accordance with the pressing force to the body and issuing a warning with the alarm when the pressing force to the body is lowered at the detection of the displaced amount. CONSTITUTION:When a detector is pressed to the body through a handle 11 by a worker, the lower end of the horn 19 is pressed to the body. The mobile body 22 is displaced together with the horn 19 in the direction separating from the body against the elastic force of a coil spring 24, and the upper wall is abutted on the lower surface of a separating wall 16. Simultaneously, a pushing-up piece 34 is made to move upward to push up a lever 33a, thereby a microswitch 33 is closed to output a detecting signal S. Since a contact circuit 35a is switched to the open state by the signal S, the alarm sound of a piezoelectric buzzer 35 is stopped. When the pressing force of the horn 19 is decreased, the output of the signal S is stopped by the switch 33, so the buzzer 35 is exerted to issue the alarm sound. Whether the horn 19 is pressed against the body with the constant pressure or not can be decided by the presence of this alarm sound. |
