| 摘要 |
<p>In a toggle-type clamping device that is driven by a belt (9) driven by a motor, it is desired to detect securely a break in the belt (9) using a simple and inexpensive construction. A dog (13) is mounted on a crosshead of a toggle mechanism, a proximity switch (14) is mounted on a rear platen, and arrival of the crosshead at a predetermined position is detected. A position detector is mounted on a motor that drives the toggle mechanism via a belt and a ball screw. When arrival of the crosshead at the predetermined position (a mold touch position or a position at which the mold is open a predetermined distance from the mold touch position) is detected by the position detector, if the dog (13) is not detected by the proximity switch (14), the clamping device outputs an alarm as an indication that an abnormality such as a break in the belt (9) has occurred. Simply by adding to a conventional toggle-type clamping device a simple and inexpensive detection unit such as the proximity switch (14), the dog (13), and the like, abnormalities such as belt breakage and the like can be securely detected.</p> |
