JPS5923856Y2 - Fastening fastener - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a fastening fastener used to fasten a plurality of plate materials.

(Prior art) Fasteners for fastening multiple plates at the same time are widely used as important functional parts in the automobile industry and electrical equipment industry.In particular, fasteners integrally molded using resin materials are There are many types, and various uses have been developed depending on their shape and configuration.

By the way, in cases where the plate material thickness is large or not particularly determined, the axis can be adjusted from the legs protruding from the head, as disclosed in JP-A-49-117866 or JP-A-54-150550. A plurality of locking bodies are provided vertically in parallel to each other so as to be orthogonal to each other, and the legs of the fastener are inserted into the mounting holes penetrated through the plurality of plate materials. In this way, the plate material is clamped and fixed by which of the locking bodies and the head portions of the legs protruding from the attachment holes.

However, when using the above-mentioned fasteners, if the plate material is particularly thin, but if the mounting hole is relatively large in diameter compared to the outer diameter of the fastener, it may be difficult to The fastener tends to be pushed in at an angle with respect to the axis, and as a result, it may end up being stuck in the inclined position.
In such a case, the fastener will not function adequately.

(Purpose of the invention) In order to deal with the above-mentioned drawbacks, the fastening fastener according to this invention has a relatively simple structure, so that it can be attached to the axis of the mounting hole even if the plate material is thin. The plate material can be fastened orthogonally without being tilted, thereby ensuring that the plate material is always fastened in a highly reliable state.

(Structure of the invention) As will be clear from the reference numerals in the drawings described below, the fastening fastener according to the invention consists of a head 11 and a leg 12 protruding perpendicularly from the back surface of the head 11. The leg portion 12
The shaft center base 17 is arranged oppositely on the left and right with a pair of engagement pieces 18, 18 arranged in a desired radial direction, and arranged in different radial directions,
A plurality of deformable blades 19 and 19 are provided projecting from each other and are vertically shifted by a predetermined interval and extend by a desired number of pairs, and these opposing blades 19 and 19 are provided with protrusions 22 and 22 arranged at a predetermined diameter.
are provided to protrude in the axial direction, and the separation length 12 between both protruding ends of the retaining piece 18.18 and the opposed protrusion 2
It is characterized in that the separation length 11 of the outer end in 2.22 is formed to a size that exactly fits into the attachment hole H2 of the plate material P2.

(Example) An example of this invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the fastening fastener 10 according to this invention includes an inverted circular dish-shaped head 11,
The leg portion 12 is provided with a leg portion 12 projecting perpendicularly from the base portion, and can be integrally molded from synthetic resin.

Circumferential end 1 of the head 11 of the fastening fastener 10
3 is constituted by a circular curved surface, and a space 16 is formed on the back surface 14 side of the head 11 between it and the lower end periphery 15 of the circumferential end 13, and the space 16 becomes larger as the leg 12 faces away. ing.

The legs 12 extend perpendicularly from the center of the back surface of the head 11.

As shown in FIG. 3, the leg part 12 has an axial base part 17, and the retaining pieces 18 and 18, which are located in the desired radial direction and have a pair of arcuate projecting ends, face outward and in the longitudinal direction, respectively. It is provided to protrude from the shaft center base 17.

The distance between the two protruding ends of the surface engaging piece 18.18 is:
It is made to be slightly smaller than the mounting hole of the plate material, so that when the leg part 12 is inserted into the mounting hole, these retaining pieces 1
8.18 is just fitted into the mounting hole to prevent play or inclination in the radial direction.

Fan-shaped blades 19.19 project symmetrically from the shaft center base 17 in different radial directions orthogonal to the engaging pieces 18.18, and these opposing blades 19.19. 19
are vertically arranged at a predetermined distance from the base 17, the outer surface 20 is semicircular, and the inner surface 21 extends parallel to the side surface of the engagement piece 18. A constant distance 23.23 is formed between the joint piece 18.18 and the inner surface 21 of the vane 19.19.

Each of the blades 19.19 has a saucer-like shape that opens toward the head 11, but in the present invention, the blades 19.
A protrusion 22 is provided at the center of the protrusion 19, and in this case, the distance between the outer ends of the protrusion 22 (outer diameter) is as follows:
It is the same as the separation length of the retaining pieces 18.18, and in the illustrated example, the protrusions 22 are provided in an elongated elliptical shape, and protrude only downward on the uppermost blade, and both upward and downward on the other blades. The tip 24 of the shaft base 17 is tapered from all sides.

Next, a case will be described in which the fixing fastener 10 configured as described above is used and fixed to a mounting hole of a plate material.

As is clear with reference to FIG. 4, the fastening fastener 10
is inserted into the attachment hole H1 of the plate material P1 from the tip portion 24 side.

Then, the leg portion 12 of the fastening fastener 10 is inserted into the mounting hole H1 while receiving resistance due to the elasticity of one blade, and the back surface of the head portion 11 finally reaches the plate material P1. The leg portion 12 also passes through the attachment hole H2 of the plate P2 overlaid on the lower surface of the plate P1.

In FIG. 3, the mounting hole H2 of the lower plate material P2,
The separation length 12 between both protruding ends of the engagement piece 18.18 and the separation length 11 between the outer ends of the radially opposed projections 22.22 are H2 (hole diameter) f: 11f-12. , these engaging pieces 18.18 and protrusions 22.22 fit exactly into the mounting hole H2.

Incidentally, FIG. 6 shows an enlarged view of FIG. 3.

Figure 5 shows an example of fastening a fastener when the mounting hole H2 of the upper plate material P2 is a blank hole and the plate material P2 is thin. The piece 18.18 and the protrusion 22.22 just fit into the lower mounting hole H2.

When the fastening fastener 10 is fastened to a predetermined location in this way, the head 11 is elastically flexible due to the existence of the space 16, and therefore the fastening fastener 10 is attached to the plate material P.
It is fixed by pressing 1 from above.

When fixing the fixing fastener 10 to the mounting holes H1 and H2, after fixing, the fourth
As can be understood from FIG. 5, the presence of the retaining piece 18 prevents inclination or serves as a guide.

For inclinations in other opposite directions, a mounting hole
The inner peripheral surfaces of 1 and H2 abut to prevent inclination.

In particular, when fixing one or more relatively thin plates P2 with the fixing fastener 10 as shown in FIG. Without this, the protrusion 22 acts as a stopper.

Moreover, even if the blade 19 is formed with the protrusion 22,
Because the thickness and shape of the overall structure can maintain flexibility, if the plate material P1 to be attached is thick as shown in Fig. 4, the blade 1
9 is bent, and the protrusion 22 comes into contact with the corner of the hole end of the plate material P1, thereby fixing the entire fastening fastener.

(Effect of the invention) As explained above, the fastening fastener 10 according to this invention
When inserting the fastening fastener 10 into the mounting hole H2, the engaging piece 18.18 and the protrusion 22.22 will be inserted while coming into contact with the inner circumferential wall of the mounting hole H2. Therefore, the leg portion 12 is prevented from tilting from two different directions, and as a result, the operation at the time of attachment can be performed easily and stably, and moreover, the leg portion 12 will not be attached in the tilted state. Therefore, secure fastening can be performed with high reliability at all times.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a partial cross section of the fastening fastener according to this invention, Fig. 2 is a side view of the same, and Fig. 3 is Fig. 2 A-A.
A line view, FIGS. 4 and 5 are half-top views showing examples of use of the fastening fastener, and FIG. 6 is an enlarged view of FIG. 3. 10...Fixing fastener, 11...Head, 12...Leg, 17...Axis center base, 18...Register Piece, 19... Feather, 2
2... Protrusion, 11, 12... Separation length,
P2...Plate material, H2...Mounting hole.

Claims (1)

[Scope of utility model registration request] Consisting of a head 11 and a leg 12 projecting perpendicularly from the back surface of the head 11, the axial base 17 of the leg 12 has a pair of retaining pieces 18, 18 disposed in a desired radial direction, and a pair of retaining pieces 18, 18 having different diameters. Deformable blades 19.19 are arranged opposite to each other on the left and right in a directional arrangement, and are vertically shifted by a predetermined interval and extend by a desired plurality of pairs. Protrusions 22.22 are provided to protrude in the axial direction at a predetermined diameter arrangement, and
The separation length 12 of the side protruding ends of the retaining pieces 18.18 and the separation length 11 of the outer ends of the opposed projections 22.22 are both dimensions that exactly fit into the mounting hole H2 of the plate material P2. A fastening fastener formed to