| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an improved crane hook block for promoting the leaving of a wire rope for a sheave. <P>SOLUTION: The crane hook block 100 includes a sheave housing 102 having the sheaves, an extension portion having a hole passing therethrough and a housing frame having a lock face; cross beams 118 each having a plurality of brackets having holes; the brackets having a plurality of surfaces corresponding to a plurality of angles at relative positions between the sheave housing and the first cross beam, the plurality of surfaces forming clearances between the plurality of angles corresponding to the lock face; a shaft to be rotatably constrained in the hole of the extension portion of the housing and in the holes of the plurality of brackets; and a lock bar having a size large enough to be installed in the clearance between the lock face and any of the plurality of surfaces to lock the movement of the sheave housing relative to the cross beam. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
