Patent ID: 6273632
Filing Date: 2001-08-14
Classification: F16C,Y10T

Abstract:
A pivotal pin joint for connecting one end of a mechanical structural member between a pair of bracket portions of another mechanical structural member, comprising:a joint pin configured to be passed across the bracket portions through said mechanical structural member; anda joint pin lock mechanism configured to lock said joint pin in a fixed state at least against movements in rotational directions, said joint pin lock mechanism comprising:a collar portion provided fixedly at and around one axial end of said joint pin and configured to be extended along and on an outer side of one of the bracket portions in a direction perpendicular to an axis of said joint pin;a locking slot formed in said collar portion in predetermined length and width and having a longitudinal center line extended in a direction perpendicular intersecting said axis of said joint pin;a seating member configured to be fixedly attached on the outer side of the one of the bracket portions; andan anti-rotation block member rotatably supported on said seating member for engagement in said locking slot in said collar portion, said anti-rotation block member being rectangular in shape and having a width substantially same as that of said locking slot and a length shorter than that of said locking slot.