JPH01165810U - - Google Patents

Description

[Brief explanation of drawings]

The drawings show one embodiment of the plastic rivet of the present invention. Figure 1 is an exploded perspective view of both the female and male members, and Figure 2 is a partially sectional front view of the male and female members in a temporarily assembled state. Fig. 3 is a partially cross-sectional front view of multiple workpieces stacked and fixed, Fig. 4 is a partially cross-sectional front view of the female member, and Fig. 5 is a half-section view of the female member. Figure 6 is a front view of the male member, Figure 7 is a plan view of the male member, with one half viewed from above and the other half viewed from below. FIG. 7 is a sectional view taken along the line ---, and FIG. 9 is a partial sectional view taken along the -- line in FIG. 8. In the diagram,
F is the female member, 1 is the cylindrical body, 2 is the collar, 3 is the slit, 4 is the cut piece, 5 is the claw, 6 is the depression,
7 is a sawtooth cam, 7a, 7b, 7c are the upper surfaces thereof,
Lower surface, slope, M is male member, 11 is its head, 12
14 is a shaft portion, 14 is a downward protrusion, 15 is a recess, 16 is a locking protuberance, 17 is an interval therebetween, and 18 is a partition wall.

Claims (1)

[Claims for Utility Model Registration] (1) A cylindrical body and a flange extending from the outer periphery of the upper end of the body; a female member formed with an expandable cut piece; a disc-shaped head having a tool engagement groove on its upper surface; A plastic rivet comprising a male member having a shaft portion that is pushed into the inner periphery and expands the cut pieces outward, and an inwardly directed claw is provided on the inner surface of each cut piece of the female member. At the same time, on the upper surface of the tsuba, a plurality of serrated cams are installed along the inner periphery of the cylindrical body, the upper and lower surfaces of which are flat, and the middle of which has a step that is inclined in one direction in the circumferential direction. They are provided at equal intervals in the circumferential direction, and the male member is provided with downward protrusions on the lower surface of the head whose lower end can slide into contact with the upper and lower surfaces of the serrated cam, and on the outer periphery of the lower end of the shaft portion. recesses are provided at intervals in the circumferential direction for receiving the inward claws of each cutout of the female member when the protrusion is positioned on or above the upper surface of the serrated cam; A locking protuberance is provided on the upper edge for causing the inward pawl of each cut piece to ride over and maintain the cut piece in an outwardly expanded state when the protrusion is in sliding contact with the lower surface of the serrated cam. , and the recess provided on the outer periphery of the lower end of the shaft portion of the male member is divided by a radial partition wall that slides into slits forming a plurality of cut pieces in the cylindrical body of the female member. plastic rivets. (2) In the plastic rivet according to claim 1, the female member has a circular recess on the upper surface of the collar for accommodating the disk-shaped head of the male member, and the plurality of serrated cams are arranged in the recess. A plastic rivet characterized by being provided on the bottom at equal intervals in the circumferential direction.