JPH0546630Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application: The present invention relates to an improvement in the assembly structure of metal lattices used in architecture.

B. Conventional technology: In a conventional metal lattice, the vertical bars and horizontal bars were fixed immovably using rivets.

In addition, the lattice was sometimes compressed diagonally and folded, but in that case, small washers were inserted between the vertical and horizontal bars of the lattice to prevent the lattice surface from being damaged by folding. It was common to fasten them with rivets.

(c) The purpose of the invention or the problem that the invention attempts to solve. : Grids that are immovably fixed with rivets are bulky and inconvenient to handle during packaging, stocking, and transportation.

Furthermore, when the grid is forcibly compressed and folded diagonally in order to reduce its volume, there is a drawback that the contact portion of the metal surface is damaged during compression and restoration.

In addition, when folding the lattice, in order to avoid damaging the metal surface, a small washer is interposed between the horizontal and vertical bars and the rivets are fastened together, which is time-consuming and difficult to manufacture as there are many tack-fastening points. This resulted in drawbacks that pushed up the cost.

D. Structure of the invention or means for solving problems: To explain the structure of the main idea with reference to the diagram, 1 is the horizontal bar of the lattice, 2 is the same vertical bar, and 3 is the stud.

The horizontal bar 1 is a metal rod-shaped body having a U-shaped cross section, and is composed of both side walls 4 and a bottom wall 5.

The vertical bar 2 is a metal hollow bar-shaped body having a rectangular cross section.

The grid is made by arranging the required number of vertical bars 2 in parallel at equal intervals,
Several horizontal bars 1 are passed at right angles to the vertical bars 2, and rivet holes 6 are provided at the intersection of both bars, and the studs 3 are passed through the rivet holes 6 to connect the vertical bars 2 and the horizontal bars 1. It is assembled with rivets.

The rivet hole 6 is bored in the center of the bottom wall 5 of the horizontal rail 1.

The rivet hole 6 has a peripheral wall 7 pushed out of the bottom wall 5 to form a swollen protrusion 8.

In order to make the expanded protrusion 8, the hole diameter of the female die of the press is increased and the peripheral wall 7 of the rivet hole 6 is pushed out to the outside of the horizontal bar 1 as shown in FIGS. 1 and 2. Alternatively, the hole diameter of the female mold may be adjusted and a large burring may be intentionally made to protrude outside the bottom wall 5, as shown in Figs. 2 and 4. good.

The height of the protruding portion 8 is approximately 0.5 to 1.0 mm.

Therefore, when the vertical bar 2 comes into contact with the bottom wall 5 of the horizontal bar 1, the vertical bar 2 and the horizontal bar 1 abut at the tips of the swollen protrusions 8, so that there is a gap between the vertical bar 2 and the horizontal bar 1. 0.5 to 1.0
A gap 9 of about a millimeter is created.

Note that it is not necessary to provide the swollen protrusions 8 in the stud holes 10 of the vertical beam 2.

Further, the fastener 3 is caulked with such strength that the vertical bar 2 and the horizontal bar 1 can rotate relative to each other even though they exhibit resistance.

Reference numeral 11 indicates a damaged portion when the lattice is folded.

E. Operation: Since the present invention has a structure as shown in the drawings and the above description, the lattice assembled as shown in Fig. 5 is assembled as shown in Fig. 6.
When folding diagonally as shown in the figure, vertical strip 2 and horizontal strip 1
A gap 9 is maintained between the vertical beam 2 and the horizontal beam 1.
There is no contact or rubbing.

Example: The figure shows an example using drawn aluminum material.

G. Effects of the invention: Since the invention is constructed and operates as described above, it has the following effects.

(b) Even if the grid is folded for packing or transportation, the damaged part 11 of the vertical beam 2 will not be damaged.
Product value never decreases.

(b) The work of creating the protrusion 8 around the rivet holes 6 of the horizontal crosspiece 1 is done at the same time as the drilling work using a press when drilling the rivet holes 6 of the horizontal crosspiece 1, which increases the work process. It is not necessary and therefore does not increase manufacturing costs.

[Brief explanation of the drawing]

Fig. 1 is an enlarged view of the rivet part, part of which is shown in cross section, and Fig. 2 is an enlarged view of the tack part of another embodiment, part of which is shown in cross section. , FIG. 3 is a perspective view of the stud hole, FIG. 4 is a perspective view of another embodiment, FIG. 5 is a rear view of the grid, and FIG.
FIG. 7, which is a rear view of the grid when it is folded, is an explanatory diagram of injuries caused by folding. In the figure, 1...Horizontal bar, 2...Vertical bar, 3...
Stud, 5...bottom wall, 6...tack hole in horizontal rail, 7...peripheral wall of the tack hole, 8...expansion, 9...gap, 10...
Rivet holes in the vertical beam, 11...injured area.

Claims (1)

[Scope of Claim for Utility Model Registration] In a metal lattice used in construction, the peripheral wall 7 of the stud holes 6 provided in the bottom wall 5 of the horizontal beam 1 is pushed out in the direction of the outer surface of the bottom wall 5 to form a protrusion 8, The vertical bar 2 is brought into contact with the outside of the bottom wall 5 of the horizontal bar 1, the rivet holes 6 of the horizontal bar 1 and the rivet holes 10 of the vertical bar 2 are overlapped, and the fasteners 3 are passed through both the rivet holes 6 and 10. A metal lattice, characterized in that horizontal bars 1 and vertical bars 2 are rotatably riveted.