JPS618330A - Retaining construction of foamed body - Google Patents

Abstract

PURPOSE:To obtain a retaining construction of a foamed body in which the foamed body and a mating part are fixed securely while the tip of a screw is concealed into a projection, by engaging a screw with a plate nut inserted into the projection of the foamed body. CONSTITUTION:A projection 13 protruded in the direction A of inserting a screw is previously formed integral at a screw retaining part 5 corresponding to a hole 3 for mounting a mating part 2 in a foamed body 12. When a plate nut 15 is inserted into the projection 13 from the direction B being guided with a guide section 14, a stopper 17 of the plate nut 15 hits the guide section 14 and a threaded hole 20 of the plate nut 15 is positioned at the center of the projection 13. A mating part 2 is put on an opposed surface 8 of the foamed body 12 and then, a screw 4 is inserted through the mounting hole 3 and engaged with the threaded hole 20 of the plate nut 15 to fix the part 2. As the thickness l1 of the screw retaining part 5 is larger than that l2 of the foaming body 12, the foaming body 12 can not be broken so easily. The tip 11 of the screw 4 is located in the projection 13, covered therewith 13 without being exposed outside.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a locking structure for a foam body, and more particularly to a locking structure for a foam body in which a mating component is superimposed on the foam body and is locked with a screw.

Plate Rice - Ibara Ice Generally, when a foam and a mating part are overlapped and locked together, the mating part 2 is attached to the foam 1 by inserting the screw 4 into the hole 3 as shown in Fig. 3. The screws 4 are inserted into the foam L as the locked part to lock the other part 2 to the foam 1, but since the foam 1 as a whole is brittle and lacks strength, it is difficult to tighten the screws 4 strongly. Then, the screw locking part 5 of the foam l is easily destroyed, and the screw 4 is attached to the foam l.
The other component 2 cannot be held in place on the foam l. Conventionally, in order to prevent this from happening, instead of locking the screw 4 to the foam 1 itself, as shown in FIG. For installation, a locking hole 6 corresponding to the hole 3 is provided, and a screw hole 7 is made to correspond to the locking hole 6.
[hereinafter referred to as the "opposite side"]] 9, a plate nut 10 is glued, and the screw 4 is attached to the other part 2 through the hole 3 and the locking hole 6 of the foam l.
By screwing into the screw hole 7 of the plate nut 10 which was passed through and bonded, the mating part 2 was superimposed on the foam body 1 and locked.

However, with such a conventional foam locking structure, it is necessary to take the trouble of gluing the foam to the opposite surface 9 of the foam 1, and the gluing work is unexpectedly difficult. This is cumbersome and requires some extra time for the adhesive to dry. Furthermore, the tip 11 of the screw 4 after locking is exposed on the opposite surface 9 of the foam 1, so if a wire is placed on the opposite surface 9, the wire will be damaged by the tip 11 of the screw 4 and a short circuit will occur. There is a risk of it happening. In addition, even if you perform inspection, repair, or other work, you may be injured by the exposed tip 11 of the screw 4.

This invention was made by focusing on such conventional technology, and does not require the troublesome work of gluing the plate pads in advance, and the tip of the screw is exposed on the opposite side of the foam after installation. The purpose of this invention is to provide a foam locking structure that will never cause damage.

In order to achieve the above-mentioned purpose, the foam locking structure according to the present invention is first raised at the screw locking portion of the foam in the screw locking direction. A protrusion is formed to cover the tip of the screw. Then, by inserting a plate nand into this protrusion and screwing the screw into the screw hole of the plate nut, the mating part and the foam are overlapped and locked.

Function When stacking the foam and the other part and inserting the screw from the other part, if the plate nut is inserted into the protrusion of the foam in advance, the screw will be screwed into the plate nut and the foam will be inserted. The mating part is securely locked and fixed, and the tip of the screw is hidden within the protrusion and is not exposed to the outside.

EXAMPLES The present invention will be explained below based on the drawings. In addition, the same reference numerals are given to the parts common to the conventional ones below,
Duplicate explanations will be omitted.

FIGS. 1 and 2 are diagrams showing one embodiment of the present invention, particularly an example in which a mating component is overlapped and locked onto a foam.

The mating part 2 is attached to the foam body 12 at a portion corresponding to the hole 3, that is, at a screw locking portion 5, a protrusion 13 raised in the screw engagement direction A is integrally formed in advance. This protrusion 13 is located on the opposite surface 9 of the foam 12 and covers the tip 11 of the screw 4 without being exposed to the outside.
The center is raised and the whole is shaped like a mountain of building blocks, and a rectangular guide portion 14 is integrally provided at one end. Reference numeral 15 is a plate nand, and its both ends are spaced apart from each other corresponding to the width W of the guide portion 14.
There is a bent portion 16 corresponding to the height h of the guide portion 14, and a stopper 17 is also formed by bending one side between the bent portions 16. The plate nut 15 is guided by the upper surface 18 and both side surfaces 19 of the guide portion 14. Next, the locked state between the foam 12 and the counterpart component 2 will be explained. First, the mating part 2 is placed on the mating surface 8 of the foam 12, and when inserting the screw 4, the plate nand 15 is guided by the guide part 14 in advance and inserted into the protrusion 13 from the direction of arrow B. Temporary nut 15 is stopper 17
is inserted until it hits the guide part 14. At this time, the stopper 17 hits the guide part 14 and the plate nut 15
The screw hole 20 is located at the center of the protrusion 13. All that is left to do is to insert the screw 4 through the hole 3 and screw it into the screw hole 20 of the plate nut 15 in the protrusion 13. At this time, the plate nut 15 is guided and positioned by the guide part 14, and is inserted into the protrusion 13, so to speak, so that even if the screw 4 is screwed into the screw hole 20, the insertion direction is A. Since rotation is prevented within the protrusion 13 without causing any displacement, it is very easy to screw the screw 4 into the plate nut 15. Also, the screw 4 is completely inserted into the protrusion 13.
Since it is screwed into the plate nut 15 inside, the foam 12 and the mating part 2 are reliably locked and fixed. Furthermore, foam 1
Since the wall thickness (11) of the part where the plate nut 15 of No. 2 is embedded, that is, the screw locking part 5, is thicker than the wall thickness of the foam 12 itself, that is, the wall thickness (12) between the mating surface 8 and the opposite surface 9, Even if the screws 4 are tightened too much, the foam 12 will not be easily damaged, and stronger tightening can lock the foam 12 and the mating component 2 with force.

In such a locking structure, the tip 11 of the screw 4
is located within the protrusion 13 and is completely covered by the protrusion 13 without being exposed to the outside.

Since the locking structure of the foam according to this invention is as explained above, it is possible to securely attach the foam using screws without requiring troublesome work or unnecessary time. Since the mating parts can be locked and fixed, and the locking screws are never exposed to the outside, wiring and other parts will not be damaged, and workers will not be injured by the screws. In addition, the protrusion in this invention can be integrally molded at the same time as the foam is molded, so it does not take much time to form it, and the thickness of the foam at the part where the plate nand is inserted can be set large, so that the foam and the other There is also the effect that parts can be locked even more strongly.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the invention, and FIG. 2 is an arrow 1r-IIM4 in FIG. 1 showing an embodiment of the invention.
3 is a sectional view showing a general example of a foam locking structure, and FIG. 4 is a sectional view corresponding to FIG. 3 showing a conventional foam locking structure. 1.12- Foam 2- Mating part 3- Mounting hole 4- Screw 5- Screw locking part 6- Locking hole 7.20- Screw hole 8- Matching surface 9- Opposite surface 10.15- Plate nut 11 - Screw tip 13 - Projection 14 - Guide part 16 - Bent part 17 - Stopper 18 - Top surface 196 of guide part. - Both sides of the guide part A - Direction of insertion of the screw B - Direction of insertion of the plate nand w - Width of the guide part h - Height of the guide part 11.12 - Thickness of the foam

Claims (1)

[Claims] In the foam locking structure in which the foam and the other component are overlapped and the screw inserted into the foam from the other component is used to fix the foam and the other component, the screw locking part of the foam is A foam locking structure characterized by forming a protrusion for covering the tip of a screw raised in the screw insertion direction, and screwing the screw into a screw hole of a plate nut inserted into the protrusion.