| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent connection between a connecting pin and a cylinder device from being released by the turning force of the connecting pin when a boom and a slewing body are connected by the connecting pin which is installed and removed by the cylinder device. <P>SOLUTION: The cylinder device is installed in the foot part of the boom 4 to expand and contract toward a pin hole. The connecting pin 19 is connected to the end of a cylinder rod 32c and a protrusion member 37 is installed in the connection part between the cylinder rod 32c and the connecting pin 19. The protrusion part 37 is made up of a shaft part 37a, an insertion part 37b, an engagement part 37c and a connection part 37d. In case turning force is applied to the connecting pin 19, the protrusion part 37 is broken away from the connection part 37d. But the connection between the connecting pin 19 and the cylinder rod 32c is kept by the engagement part 37c and the insertion part 37b. <P>COPYRIGHT: (C)2003,JPO</p> |
