| 摘要 |
PROBLEM TO BE SOLVED: To improve strength of an installing part of a ladder body, by reducing push-out of a tip part of the ladder body, when developed. SOLUTION: This evacuation ladder device has the pantograph type ladder body 10 stored in a storage frame arranged on a slab such as a floor and a veranda, a vertical sash bar 11 of the uppermost part of the ladder body 10 fixed in the storage frame 3, and a ladder receiver 4 for rotatably installing parallel links 20 for constituting a four-node parallel link mechanism 30 by cooperating with the vertical sash bar 11. The ladder receiver 4 is provided with a parallel link guide piece 50 for supporting the parallel links 20 when developing the ladder body 10, and a bearing 45 for movably supporting a rotary support shaft 21 of the parallel links 20 on the rotational free end side of the vertical sash bar 11. A circular arc-shaped guide part 52 bending inward by continuing with a guide surface 51, is formed in an upper end part of the guide piece 50. A guide hole part 47 for guiding the rotary support shaft 21 by following rotary operation when the parallel links 20 contact with the circular arc-shaped guide part 52, is formed in the bearing 45. COPYRIGHT: (C)2005,JPO&NCIPI
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