| 摘要 |
PURPOSE:To surely and safely detect a string being caught in the bottom end part of a safety shoe. CONSTITUTION:A roller 11 rolling along a doorsill 5 is provided to an operating piece 7. This roller 11 is displaced in the up and down direction relative to the operating piece 7 by means of a rod 12 and a frame body 13. Moreover, a detecting switch 15 for operating when the roller 11 moves to the upper direction by a specified value is provided. A cage door is reversed by operation of the detecting switch. It is safe without hanging a string by the roller. This device can be used for both a double swing and a single swing door. |
