SEPARATION PREVENTIVE DEVICE BETWEEN FEED TABLE AND ROTATION SUPPORT PIN

摘要

PROBLEM TO BE SOLVED: To provide a separation preventive device for preventing the separation of a feed table provided with a rotation support pin from a positioning block to position a self-propelled truck-drill type excavator. SOLUTION: The separation preventive device is provided with a first restraining system attached to a positioning block and a second restraining system attached to a feed table. The first restriction system is a bush provided with a pair of tab-like protrusions and contained in a pair of female restraining members each with a groove. These grooves formed in the female restraining members are shaped so that they can house these tab-like protrusions respectively. This system allows relative rotations between the bush and these female restraining members, while preventing the feed table from moving in the direction of rotation axis of the rotation support pin and leaving this pin. COPYRIGHT: (C)2005,JPO&NCIPI