Patent ID: 8220837
Filing Date: 2012-07-17
Classification: F16L,Y10T

Abstract:
1. A connector drop-off prevention structure comprising: a pipe member having a first flange and a second flange projectingly provided on an outer periphery of the pipe member; a pipe-shaped connector having a large diameter portion at one end and a small diameter portion at the other end connected via a step, wherein the connector and the pipe member are joined by inserting the first flange into an inner periphery of the large diameter portion; a drop-off prevention holder which straddles the pipe member and the connector, wherein the drop-off prevention holder is box-shaped with an open face positioned intermediate a first face and a second face, the first face and the second face of the drop-off prevention holder opposing each from opposing ends of a longitudinal axis of the pipe member, a first cutout is formed in the first face and communicates with the open face, the first cutout fitting onto the small diameter portion and abutting against the step, a throat portion having a slightly smaller width than an outer diameter of the small diameter portion and being formed partway along the first cutout, a second cutout is formed in the second face and communicates with the open face, the second cutout fitting onto the pipe member and abutting against the second flange; and a swing fulcrum portion is projectingly provided on the second face, the drop-off prevention holder is fitted onto the connector by swinging the drop-off prevention holder toward the connector with the swing fulcrum portion being used as a fulcrum.