JPH0165481U - - Google Patents

Description

[Brief explanation of the drawing]

1 and 2 are enlarged sectional views for explaining the action of the retaining member according to the embodiment of the first invention,
Fig. 3 is a partial sectional view showing an example in which the retaining member according to the first embodiment of the invention is incorporated into a joint body that does not use a push ring, and Fig. 4 shows a stage in the middle of inserting a bar into the joint body. FIG. 5 is a partial sectional view showing the bar completely inserted into the joint body, FIG. 6 is a partial sectional view showing the bar being prevented from coming off, and FIG. FIG. 8 is a cross-sectional view of the push ring incorporating the retaining member according to the embodiment of the invention 1, and a bar inserted into the joint body; FIG. 9A to 9H are end views illustrating modified examples of the retaining member of the first invention, and FIG. 10 is a cross-sectional view of the retaining member according to the embodiment of the second invention. 11 and 12 are enlarged sectional views showing how the retaining member according to the third embodiment is used, and FIG. 13 is a partially cutaway perspective view of the conventional retaining member. FIG. 14 is a cross-sectional view showing how a conventional retaining member is used. 1...Bar material, 2...Joint body, 3...Press ring, 3
a... Tapered surface of push ring, 4... Removal prevention member, 4a
...First biting tooth (biting tooth), 4b... Second biting tooth (biting tooth), 4d... Part that comes into contact with the tapered surface, 25... Tapered surface of the joint body, X... Rod Direction of material pulling.

Claims (1)

[Claims for Utility Model Registration] 1. A device that is arranged between a bar and a cylindrical joint body into which it is inserted or a press ring that is screwed onto the joint body, and that follows the bar in the direction in which the bar is pulled out. Consists of a ring-shaped member that is pressed by the tapered surface formed on the joint body or press ring when moving to reduce its diameter, and is formed from the smallest diameter part in its natural state to the part opposite to the insertion side end of the bar material. The first biting tooth and the second biting tooth are provided in the shape of an edge, and the first biting tooth is configured to have a smaller diameter than the second biting tooth, and the first biting tooth and the second biting tooth are A member for preventing a bar from falling out of a joint body, characterized in that the outline of the outer surface, excluding the area where two biting teeth are formed, is partially circular. 2. Arranged between the bar and the cylindrical joint body into which it is inserted or the press ring that is screwed onto the joint body, and when the bar is moved in the direction in which the bar is pulled out following the bar, the joint body or the press ring It consists of a ring-shaped member whose diameter is reduced by being pressed by a tapered surface formed on the rod, and has a plurality of steps formed from the smallest diameter part in the natural state to the part on the opposite side of the insertion side end of the bar. In addition to being provided with edge-shaped biting teeth, the biting teeth on the side closer to the insertion side end of the bar are configured to have a smaller diameter than the biting teeth on the side farther away, and the biting teeth are formed. A member for preventing a bar from falling out of a joint body, characterized in that the outline of the outer surface except for certain parts is partially elliptical. 3 Disposed between the bar and the cylindrical joint body into which it is inserted or the press ring that is screwed onto the joint body, and when the bar is moved in the direction in which the bar is pulled out following the bar, the joint body or the press ring It is a ring-shaped member that is pressed to reduce its diameter by a tapered surface formed on the rod, has a non-circular cross-sectional shape, has a plurality of edge-shaped biting teeth on its inner circumferential surface, and has A bar material for a joint body, characterized in that the biting teeth on the side closer to the part are configured to have a smaller diameter than the biting teeth on the side further away from the part, and further, the part that comes into contact with the tapered surface is formed in a convex curved shape. A retaining member.