JPS6151682B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure for attaching a screw hole piece to an extruded material made of aluminum or the like.

Since an extruded material has the same cross-sectional shape over its entire length during manufacture, even in an extruded material with screw holes, the screw holes are formed over the entire length in the longitudinal direction. Fig. 1a shows an arc-shaped fin piece 2 formed on an extruded material 1, and Fig. 1b shows an arc-shaped fin piece 2 formed at the tip of a protrusion 3 to form a screw hole 4.
These fin pieces 2 and protrusions 3 are formed continuously along the entire length in the longitudinal direction. However, for the purpose of screw connection, the screw holes only need to be provided at the ends of the extruded material, and the other parts are useless (although they do have a reinforcing effect). The cross-sectional area of this screw hole portion is several percent of the cross-sectional area of the entire mold material, and that much material is wasted. In order to solve this problem, a method has been proposed in which a separate screw hole piece is made and then screwed to the end of the mold material.
This method requires drilling holes in the mold material, which is not only cumbersome to process and install, but if the screw holes are completely eliminated, the strength of the entire mold material will be reduced, and the thickness of the entire mold material will be reduced. had to be increased, and in the end, the effect of material savings was not so great.

The present invention allows screw hole pieces to be attached easily and reliably without any processing on the mold material itself.
The object of the present invention is to provide a structure for attaching a screw hole piece to an extruded shape material, which enables a large reduction in the amount of material used without sacrificing the strength of the shape body.

Embodiments of the present invention will be described below based on the drawings.
Ribs 6 are formed on the extruded material 5 over the entire length in the longitudinal direction. This rib 6 has a leg portion 6a and a leg portion 6.
It has a substantially T-shaped cross section, consisting of a flange portion 6b formed at the tip of the flange portion 6b. This rib 6
A screw hole piece 7 separately formed by extrusion molding or the like is attached to the screw hole piece 7. The screw hole piece 7 has circular arc portions 8a and 8b of the same diameter arranged in parallel, and one of the circular arc portions 8a has a shape in which grooves 9a and 9b are formed in the upper portion and the other circular arc portion 8b in the side portion. Groove 9a in one circular arc portion 8a of this screw hole piece 7
After sliding the lock member 10 onto the leg portion 6a of the rib 6 to engage the flange portion 6b of the rib 6 into the arc portion 8a, insert the lock member 10 into the space G between the flange portion 6a and the inner wall of the arc portion 8a. Insert. The locking member 10 in FIGS. 2 and 3 consists of a screw with a hexagonal hole 11, and by screwing it in, the screw hole piece 7 is fixed to the extruded material 5, and the hole in the other circular arc portion 8b is used as a screw hole. be done.

FIG. 4 shows the other arcuate portion 8b attached to the rib 6 by the same means; in this case, one of the arcuate portions 8b
Hole a is used as a screw hole.

Figures 5 to 8 show an embodiment in which a wedge 12 and a caulking pin 13 are used for the locking member 10 of a screw hole piece, and the wedge is a hairpin type wedge made of stainless steel or the like with many triangular pyramid-shaped protrusions 14 on the surface. 12 into the space G, by driving the caulking pin 13 into the inside of the wedge 12, the protrusion 14 bites into the flange portion 6a and the screw hole piece 7 as shown in FIG. 6, and is securely fixed.

The wedge 12 is formed by press forming as shown in FIG. 7b.
By forming a long strip 15, cutting and bending it, a wedge in which the protrusions 14 are oriented upside down is formed. In Fig. 6, when a screw is screwed into the screw hole piece 7, the screw hole piece 7 is attracted in the direction of the arrow 16, but when a force in the direction of the arrow 16 is applied, the upper and lower protrusions 14 are attached to the flange portion 6b and the screw hole piece 7, respectively. It bites in more and more and strongly prevents it from coming off. However, the shape and orientation of the protrusion 14 are arbitrary and are not limited to those shown. It goes without saying that the other arcuate portion 8b may be attached to the rib 6 in the embodiment shown in FIG.

As described above, according to the present invention, a substantially T-shaped rib consisting of a leg and a flange formed at the tip of the leg is formed along the entire length in the longitudinal direction of the extruded material, and engages with the flange of the rib. Extruding one of the circular arc portions of the screw hole piece, which has circular arc portions of the same diameter that are parallel to each other, and in which grooves for inserting the legs of the ribs are formed in different portions in the longitudinal direction of both of the circular arc portions. A lock member is attached to the longitudinal end of the shape material and fitted into the space between the flange portion of the rib and the inner wall of the circular arc portion attached to the rib, so as to integrally fix the extruded shape material and the screw hole piece. As a result, the amount of material can be significantly reduced compared to the conventional method in which screw holes are formed over the entire length, and there is no need to perform any processing on the extruded material, and the installation of the screw hole piece is easy. In addition, high mounting strength can be obtained, and since the ribs also contribute to reinforcing the extruded material itself, there is an effect that the strength does not decrease even though the screw holes are not formed over the entire length.

[Brief explanation of the drawing]

Figures 1a and b are perspective views showing two examples of conventional extruded molded materials with screw holes, Figures 2 to 4 are the first embodiment of the present invention, Figure 2 is an exploded perspective view, and Figure 3 is an exploded perspective view. 4 is a sectional view of another installation example, FIG. 5 is a sectional view of another embodiment, FIG. 6 is a sectional view taken along the - line in FIG. 5, and FIG. 8 is a side view of the same caulking pin, FIG. 8a is a side view of the wedge, and FIG. 8b is a plan view of the strip forming the wedge. 5... Extruded mold material, 6... Rib, 7... Screw hole piece, 10... Lock member.

Claims (1)

[Claims] 1. A substantially T-shaped rib 6 consisting of a leg 6a and a flange 6b formed at the tip of the leg 6a is formed along the entire length of the extruded material 5 in the longitudinal direction, and is engaged with the flange 6b of the rib 6. It has parallel arc parts 8a, 8b of the same diameter, and both arc parts 8a, 8b
Attach the arcuate portions 8a, 8b of either one of the screw hole pieces 7, which have grooves 9a, 9b into which the leg portions 6a of the rib 6 are inserted in different portions in the longitudinal direction, to the longitudinal ends of the extruded material 5. , the flange portion 6b of the rib 6 and the arcuate portion 8 attached to the rib 6.
A mounting structure for a screw hole piece in an extruded material, characterized in that a locking member 10 is fitted into a space G between the inner walls of a and 8b, and the extruded material 5 and the screw hole piece 7 are integrally fixed.