To reduce a risk of fall of an overhead crane, resulting from separation of a wheel from a web of a rail due to runaway of the overhead crane during an occurrence of an earthquake.SOLUTION: A safety device for an overhead crane comprises a block body 4 comprising a brake shoe 15 that is pressed against a rail upper surface 3 in the same longitudinal position as a pair of claw portions 5, 5 hooked on the underside 2A of the web 2 of a rail R. Runaway and derailing of the overhead crane during earthquake are prevented by the safety device provided with an electromagnetic brake 17 that switches to a pressing brake state if a power outage is caused during earthquake.SELECTED DRAWING: Figure 4
【課題】地震発生時に天井クレーンの逸走によって、レールのウェブから車輪が離脱し、天井クレーンが転落する危険を低減する。【解決手段】レールRのウェブ2の下面2Aに引掛ける一対の爪部5,5と、同じ長手方向位置にレール上面3に対して押圧するブレーキシュー15を備えたブロック体4を備え、地震発生時に停電すると、押圧制動状態に切り替わる電磁ブレーキ17を配設した安全装置により、地震時の天井クレーンの逸走と脱線を防止する。【選択図】図4
SAFETY DEVICE FOR OVERHEAD CRANE
天井クレーンの安全装置
2021-02-22
Patent
Electronic Resource
Japanese
IPC: | B66C Krane , CRANES |
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