Rotation stop pin

Abstract

This item is a rotation-stopping pin used to stop the rotation of cylindrical pipe members in beams that make up suspended scaffolding, an example of equipment, and as shown in "Reference Figure 1 Showing the State of Use," it has an overall shape formed in an inverted J shape, with a curved insertion portion formed at one end and a flat washer supporting a compression spring at the other end that is prevented from coming out by a spring pin. This item is attached, for example, so as to straddle a first attachment piece and a second attachment piece that are fixed facing each other with a predetermined distance between them. These first and second mounting pieces are attached so that the shank of a long bolt passes vertically through an axial insertion hole provided radially in the pipe member, the shank of this bolt is inserted into the frame material, and the frame material is fixed by inserting the tip of the bolt into another mounting piece and screwing a nut into it, supporting the pipe member so that it can rotate horizontally around the shank of the bolt, and a tip insertion hole shown in ``Reference Figure 3 showing the state of use'' is provided into which the tip of the curved insertion part can be inserted at a position offset from the shank of the bolt in the pipe member, and the first mounting piece is provided with a mounting piece insertion hole at a position that overlaps with the tip insertion hole when the pipe member is held at a specific angle (an angle that matches the longitudinal direction of the first and second mounting pieces). As shown in "Reference Figure 1 Showing the State in Use," this article is biased by the compression spring so that the tip of the curved insertion portion is inserted into the mounting piece insertion hole and abuts against the pipe member, and as shown in "Reference Figure 2 Showing the State in Use" and "Reference Figure 3 Showing the State in Use," when the pipe member rotates horizontally to reach the specific angle, the tip of the curved insertion portion is automatically inserted into the tip insertion hole that overlaps the mounting piece insertion hole by the biasing force of the compression spring, preventing the pipe member from rotating horizontally and maintaining the pipe member at the specific angle. As shown in "Reference Figure 4 Showing the State in Use," when the curved insertion portion is pulled out of the tip insertion hole and the mounting piece insertion hole against the biasing force of the compression spring, the pipe member becomes freely rotatable horizontally around the rotation axis.

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