JPS626326Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention fixes the plate material on the board in an overlapping manner by pushing in the screw rod with a head without screwing it in, and then removes the fixation by turning the screw rod in the direction of loosening the screw.
This relates to a plastic fastener for a board that can separate the board from the substrate, and in particular allows for the removal of trim boards, etc. on car body panels quickly and with uniform reliability regardless of who does it. It was improved so that it could be fixed in place.

BACKGROUND OF THE INVENTION It has been known for a long time to secure a plate material onto a substrate in a superposed manner by means of a single-threaded fastener. However, these methods require a dedicated special tool, and there is no sense of moderation when pushing in, so there is a problem in that the degree of pushing differs depending on the operator, resulting in individual differences in the fixed state. Therefore, the present invention solves these problems as described above, and will be explained below with reference to the drawings. 1 is the bottom wall 2
The main body is made of plastic in the shape of a rectangular tube (square tube), and has ten pairs of side walls 3, 3 facing each other,
Anchor pieces 4 extending diagonally upward on the outer surface of each side wall
A collar 5 projects outward from the outer periphery of the upper end. In this embodiment, the side walls 3, 3 are anchor pieces 4,
It is split in two from above including the tsuba 5, and the bottom wall has a thin hinge 2' with each end facing the lower end of the crack in the side wall 3, and the bottom wall 2 is folded back at the hinge 2'. After forming into the state shown in the figure, it is folded at the hinge 2' and the cracks in the side walls are brought together to form a rectangular tube shape. However, this is for convenience in forming. If possible, it may be formed into a square tube.

A short projecting piece 6 extends downwardly from the inner side of the collar at a portion adjacent to the side walls 3, 3 at a right angle, and both ends of the projecting piece are connected to the inner surface of the upper end of the side walls 3, 3. At the lower end of each projecting piece 6, an elastic tongue piece 7 whose width is a little narrower than the opposing interval between the side walls 3, 3 projects obliquely toward the inside of the rectangular tube, and its free end has a female screw thread on a concave arc surface. The grip portions 8 are carved in several ridges and spaced apart in the circumferential direction.

The gripping portions 8 face each other inside the main body 1 and diametrically grip the male screw of the threaded rod 9 that is pushed in from above. Therefore, the female threads 8', which are formed in several threads on the concave arc surface of each gripping part 8, are adapted to the male threads of the threaded rod 9. In use, a rectangular hole 10' corresponding to the outer shape of the main body is formed in the substrate 10, and the main body is pushed into the hole from above.
As a result, the anchor piece 4 is pressed against the outer surface of the side wall 3 by the hole edge and passes down through the hole 10', and when it has almost passed through, it moves to open to its original state due to elastic restoring force.
Press the hole edge from below. At this time, the lower surface of the collar 5 comes into contact with the upper surface of the board, so the lower surface of the collar 5 and the anchor piece 4
The upper ends of the body sandwich the edge of the hole 10' in the substrate between them, and the main body is attached to the substrate. The attachment of the main body to the substrate using the anchor piece and collar is similar to the well-known plastic anchor-type fastener, and even if there is a slight variation in the thickness of the substrate, this can be absorbed and the attachment can be carried out.

Furthermore, the fixation of the main body to the substrate is not limited to the anchor piece 4 as described above, but the principle of other types of well-known fasteners can also be used. For example, as shown in FIGS. 7 and 8, an inverted U-shaped cut 11 is formed on each side wall, and a tongue piece 12 is formed with the free end facing upward.
The outer surface of the tongue protrudes in a chevron shape, and the upper part faces diagonally upward, and the lower part faces diagonally downward, with the top part 12' as the boundary.
and 12b, the top part 12' may be pushed into the hole 10' of the base plate so as to pass downward, and it may be attached between the obliquely upward slope 12a and the lower surface of the collar 5.

After the main body is attached to the board in this way, the threaded rod 9 is passed through the hole 13' made in the plate 13 through which the threaded rod 9 loosely passes, from the front side, and the part of the screwed rod protruding from the back of the plate 13 is held at the opposite grip part 8. , 8. As a result, the gripping parts 8, 8 are pushed apart by the screw rods, allowing the screw rods 9 to pass through the serrations.
Then, when the back side of the plate comes into contact with the upper surface of the collar 5 and the lower surface of the head 9' of the screw rod comes into contact with the front surface of the plate and it becomes impossible to push it in any further, the gripping parts 8, 8 hold the female screw having the concave arc surface. It engages with the male thread of the threaded rod and pinches the threaded rod in the diametrical direction. Therefore, the screw rod cannot be pulled out, and the plate material is fixed on the substrate in a superposed state. The screw rod 9 can be pushed in by hand without using any special tools.

In this way, in this case, the screw rod advances in a jagged manner while pushing away the opposing gripping parts 8, 8, so it is pushed in completely and the board and plate are fixed in a superposed manner, so that the male thread of the screw rod meets the female thread of both gripping parts. You can tell by touch that they are engaged. Therefore, it has a sense of moderation, can be fixed quickly, and can be fixed in a uniform state no matter who is working on it.

In this way, the plate material 13 is attached to the board 10, but when force is applied in the direction of peeling off the plate material (when the threaded rod 9 is pulled), the elastic tongue piece 7 of the main body 1 tilts inward to the main body. As a result, the gripping parts 8, 8 are acted upon by each other, and the female threads 8', 8' are strongly engaged with the male thread of the threaded rod, thereby preventing them from coming off.

Then, by turning the screw rod in the opposite direction to the lead direction of the male screw, the screw rod will come out from between the two gripping parts, so that the fixation can be released and the plate material can be removed from the board.

Of course, the threaded rod can be a male thread, but it can also be a standard thread.
In order to increase the strength against pulling out, it is best to have a particularly small root diameter, and in order to quickly unfasten with a small amount of rotation, it is preferable to use a multi-thread type screw such as a double-thread screw.
The female thread on the grip part should also correspond to this.

In this embodiment, the opposing side walls 3, 3 are split in half and molded into an open state at the hinge 2' of the bottom wall 2, so the bottom wall is essential, but when molded into a rectangular cylinder shape, The bottom wall can also be omitted. Further, when a bottom wall is provided, it is preferable to provide a hole in the center through which a threaded rod can loosely pass through, since this eliminates restrictions on the length of the plate 13 protruding from the back surface.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the state of use of one embodiment of the fastener of the present invention, Fig. 2 is a plan view of the fastener in the molded state, Fig. 3 is a side view, also partially cut away; 4 is an end view, FIG. 5 is a front view in a fixed state, FIG. 6 is a side view, FIG. 7 is a partially sectional front view of another embodiment of the fastener, and FIG. 8 is a front view of another embodiment of the fastener. is a side view of the same as above; in the figure, 1 is the main body;
3 is a side wall, 4 is an anchor piece that is a mounting means, 5 is a collar, 7 is an elastic tongue piece, 8 is a gripping part, 9 is a threaded rod, 1
0 is a substrate, 10' is its hole, 12 is a tongue piece which is a mounting means, 13 is a plate material, and 13' is its hole.

Claims (1)

[Scope of utility model registration request] It has a rectangular cylindrical main body having a pair of opposing side walls and a flange projecting outward from the outer periphery of the upper end, and the outer surface of each side wall cooperates with the lower surface of the flange to fit the edge of the hole in the board. It has a mounting means that can be mounted, and has opposed elastic tongues protruding obliquely from the inside of the collar toward the inside of the prismatic cylindrical main body at a portion substantially perpendicularly adjacent to each of the side walls, A fastener for a plate material, characterized in that both tongue pieces are integrally molded of plastic and have several female threads carved into the concave arc surface at their free ends and have gripping parts spaced apart in the circumferential direction.