Blockierungsvorrichtung für Drehgelenk

摘要

A joint pin lock system or mechanism for a pivotal pin joint whcih connects one mechanical structural member between a pair of bracket portions (30) of another mechanical structural member pivotally relative to each other by means of a joint pin (33) passed through a connecting end portion of one mechanical structural member and the bracket portions (30) of the other mechanical structural member. For locking the joint pin (33) in a fixed state at least in rotational directions, the joint pin lock mechanism (40) includes a collar portion (34) which is provided fixedly at and around one end of the joint pin (33) and extended along the outer side of one bracket in a direction perpendicular to the axis of the joint pin (33), a locking slot which is formed in the collar portion (34) in such a way as to have a longitudinal center line in an intersecting direction relative to a center line of the joint pin (33), a seating member which is securely fixed to the bracket, and an anti-rotation block which is fitted on the seating member for engagement in the locking slot of the collar portion (34). The anti-rotation block is substantially of a square shape having a width approximately same as that of the locking slot and a length shorter than that of the locking slot.