| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress deformation of a pair of brackets for sandwiching a boss member in between. <P>SOLUTION: A rotation stopper plate 21 constituting a rotation stopper 20 is provided on the upper end side of a connecting pin 19, and a stopper 24 is provided on the lower end side of the connecting pin 19. In a state in which the upper and lower brackets 12 and 13 and a boom boss 14 are connected together by means of the connecting pin 19, a spacer 21C of the rotation stopper plate 21 abuts on an outside surface 12B of the upper bracket 12, and the stopper 24 faces an outside surface 13B of the lower bracket 13 with a clearance C in between. Thus, when a load acts on the upper and lower brackets 12 and 13 from the boom boss 14 in a direction in which an interval between the brackets gets longer, the outside surface 12B of the upper bracket 12 abuts on the rotation stopper plate 21, and the outside surface 13B of the lower bracket 13 abuts on the stopper 24, so that the upper and lower brackets 12 and 13 can be axially restrained and so that the deformation of them can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
