JPS6246884Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is designed to be used as a collar, a holder for bundling and holding wire materials such as electric wires, bars, pipe materials, clips or hooks for hooking or fastening something, and other appropriate devices. This invention relates to an improvement in a plastic fastener for fixing a head shaped in the shape of a panel to a workpiece such as a panel.

This kind of locking tool is made of plastic molded integrally with the head on the side that contacts the surface of the workpiece, and is pushed into a hole in the workpiece and deformed while protruding from the back side of the workpiece, so that the head touches the surface of the workpiece. When it comes into contact with the workpiece, it returns to its original shape due to the elastic restoring force of the plastic, works with the contact surface of the head to pinch the hole edge of the workpiece, and fixes the head on the surface of the workpiece. Canoes shaped like dugout canoes and anchors with two anchor claws on the left and right sides are well-known. However, these have a large pull-out load when pulled out by pulling the head straight up, contrary to the direction in which the anchor was pushed in, but when pulled out diagonally instead of straight up, the anchor claw of the anchor One side may come off the edge of the hole, or in the case of a canoe, the surface that engages with the edge of the hole may be reduced.
In any case, the pull-out load will be very small, and the pull-out will be relatively easy. For this purpose, a cylindrical or rectangular cylindrical leg is suspended from the head, and around it, for example, four non-return claws are formed extending outward at equal intervals to prevent removal and prying. The present applicant proposed in U.S. Pat. This certainly increases the pull-out load for prying out, but on the other hand, when pushing into a hole in a workpiece, it is necessary to simultaneously deform all of the surrounding non-return claws at the edge of the hole so that they protrude from the back side of the workpiece. Therefore, a large amount of force is required to push it in.

Therefore, in the present invention, the locking tool is composed of two locking pieces, a first locking piece and a second locking piece, and after the first locking piece is pushed into the hole of the workpiece and fixed, the second locking piece is inserted into the first locking piece. The material is passed through and pushed into the hole of the workpiece to be fixed.This makes it an ideal product that does not require much force for each push, yet has a large pull-out load when pulled out or pried out. It has been improved. In this case, whether the head is provided on the first locking piece or the second locking piece,
Furthermore, it may be provided on both locking pieces.

An embodiment of the present invention will be described below with reference to the drawings.

In each figure, A indicates a first locking piece, and B indicates a second locking piece. However, the second locking piece B hangs down from the head 3 that comes into contact with the surface of the collar 2.

Although both the locking pieces A and B may be molded separately, in the embodiment shown in Figs. 1 to 5, they are folded in half at the hinge 4', and the two rods or pipes 5 are aligned in parallel between them. It is located at the upper and lower ends of the clip 4 to be held together, and is molded integrally with the clip. Therefore, in this embodiment, the head 3 is a clip 4 that is integral with the collar 2 from which the first locking piece extends, but it is of course not limited to this.

The first locking piece A is hollow and consists of a hanging part 6 that hangs down in parallel at a short distance from the bottom of the flange, and a V-shaped part 7 that is connected under the hanging part 6, and has opposite sides. It has an open hollow leg 8, and a locking pawl 9 as a locking portion that locks the hole edge of the workpiece in cooperation with the contact surface 2' of the collar protrudes from the outer surface of the lower end of each hanging portion 7. The distance between the upper edge of each locking pawl 9 and the contact surface 2' where the collar 2 actually contacts the surface of the workpiece approximately corresponds to the thickness of the workpiece. The collar 2 is provided with an opening 10 that communicates with the hollow portion 8' of the hollow leg 8. The second locking piece B is a known anchor having diagonally upward check claws 12, 12 on the left and right sides of the lower end of the central leg 11, and is pushed into the hollow portion 8' of the first locking piece A through the opening 10, and The claws 12, 12 are made to protrude outward from both open sides of the central leg 11, and the upper part of the non-return claw has a reverse slope 1.
The head 3 comes into contact with the surface of the collar 2 when the upper end of the holder 2' engages with the edge of the hole in the workpiece.

To fix the head of the clip on the workpiece, the first locking piece A is pushed into the hole 1' of the workpiece. As a result, the hollow legs are deformed to allow the locking pieces 9, 9 to pass through the holes, and when the claws come out from the back of the workpiece, they return to their original state and fasten the clip to the workpiece. Next, the clip 4 is folded with a hinge, a bar or pipe material is passed between them, and then the second locking piece B is pushed into the opening 10 of the collar 2. As a result, the non-return claws 12, 12 initially deform inward in order to pass through the opening 10 in the collar and the hole 1' in the workpiece directly below, but the opposite slopes 12' on the outer surfaces of both non-return claws When the turning point 12a appears on the back side of the workpiece, it begins to return to its original state while protruding outward from both open sides of the first hollow leg, and just before returning to its original state, it begins to move under the center leg. The edge, the lower edge of the hollow part of the first locking piece, and the end of the clip where the second locking piece grows are in contact with the surface of the flange 2, and as mentioned above, the check claw is oppositely facing the slope 12'. The upper end of the hole engages with the hole edge of the workpiece.

Therefore, since each of the first and second locking pieces is pushed in individually, a large force is not required to push them in. However, when both locking pieces are pushed in, the locking claws 9, 9 of the first locking piece and the check claws 12, 12 of the second locking piece come together to resist removal and prying. The pull-out load for both is extremely large.

If, as in this embodiment, the clip is used as a head and a first locking piece is provided on the collar 2 at one end and a second locking piece is provided at the other end, the clip can be closed in addition to increasing the pull-out load. It also serves to hold wood and pipe materials.

The planar shape of the combination of the locking pawl of the first locking piece and the non-return pawl of the second locking piece is approximately cross-shaped, and when each outer surface is linear, it matches the shape of the hole in the workpiece. Fifth
It may be made into a square shape as shown in the figure, and when each outer surface or a pair of opposing outer surfaces are arcuate, it may be made into a circular or oval shape as shown in FIG.

In addition, when the second locking piece is pushed into the hollow part of the hollow leg from the opening of the collar and the check claw engages with the hole of the workpiece, as long as the head touches the top of the collar, the lower end of the center leg does not have to come into contact with the lower end of the center part.

[Brief explanation of the drawing]

Fig. 1 is a side view of a bar holding clip equipped with an embodiment of the locking device of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a front view of the same, and Fig. 4 shows the same as the workpiece. FIG. 5 is a perspective view showing the relationship between the main parts in a fixed state; FIG. 6 is a perspective view of another embodiment of the locking device;
A is the first locking piece, B is the second locking piece, 1 is the workpiece,
1' is a hole, 2 is a collar, 3 is a head, 8 is a hollow leg, 8' is a hollow part thereof, 9 is a claw illustrated as a locking part, 10 is an opening in the collar, and 12, 12 are check claws. .

Claims (1)

[Claims for Utility Model Registration] (1) A first locking piece formed of plastic integrally with the collar under the collar that contacts the workpiece, a head, and a first locking piece formed of plastic under the head. The first locking piece is hollow and has both opposing sides open, and works with the collar to lock the edge of the hole made in the workpiece on the outer surface of the non-open side. It consists of a hollow leg with a locking part that locks the hollow leg, the collar has an opening communicating with the hollow part of the hollow leg, and the second locking piece is pushed into the hollow part of the hollow leg from the opening of the collar, It has a non-return claw that protrudes outward from the open side of the leg and engages with the hole in the workpiece, and the head engages in the first locking when the non-return claw of the second locking piece engages with the hole in the workpiece. A plastic fastener characterized by being in contact with a collar on one side. (2) The locking device according to claim (1) for utility model registration, in which the collar on the first locking piece is integrally connected to the head on the second locking piece. (3) The locking device according to claim (1) for utility model registration, characterized in that the collar on the first locking piece is separate from the head on the second locking piece.