| 摘要 |
PROBLEM TO BE SOLVED: To provide a manual opening device capable of performing the opening operation of the electromagnetic operation mechanism with a simple operation.SOLUTION: This manual opening device has an extension rod 12 connected to an operation rod 4 of an electromagnetic operation mechanism 3, a stationary plate 13 detachably mounted to a faceplate 10, and a body case 14 assembled to the stationary plate 13, and the body case 14 includes a drive plate 18 having an engagement part 18a engageable with the extension rod 12, a spring holding body 21 rotatably connected to the drive plate 18 and mounted with a coil spring 20, and a lever 23 engageable with the engagement pin 24 of the drive plate 18. The drive plate 18 rotates by driving the lever 23 with an operation bar 16 to energize the coil spring 20, when its rotational movement advances further than a prescribed level, the coil spring 20 is released from energization and the drive plate 18 is rotated by the releasing force thereof, the engagement part 18a is thereby engaged with the extension rod 12, and the extension rod 12 is driven in a pole-opening direction. |
