| 摘要 |
<p>PURPOSE: To prevent erroneous operation and improve operability and durability by releasing the lock mechanism of a lower half opening and closing body by operating a key cylinder, and opening an upper half opening and closing body. CONSTITUTION: When an upper half opening and closing body C and a lower half opening and closing body D are made a blocked state, the lower half opening and closing body D cannot be opened even when a handle 34 is operated by the action of a first lock mechanism E and a second lock mechanism F. Next, when a key cylinder is rotated and set at lock-off position, the second lock mechanism F is released to open the upper half opening and closing body C. The idling function of a link mechanism with the idling function is released, and a first link mechanism and the link mechanism with the idling function are interlocked. Next, when the handle 34 is rotated in this condition, the first lock mechanism E is released to open the lower half opening and closing body D.</p> |
