JPH01304281A - Manufacture of grating body - Google Patents

Abstract

PURPOSE:To save labor by boring a non-circular through-hole having a smooth internal surface to a crosspiece material disposed in one direction, spreading the through-hole to a circular shape from the internal surface, inserting a crosspiece material having a circular cross section and fixing the crossing crosspiece materials by the pushing of the protruding section of the first crosspiece material. CONSTITUTION:Side edges 3... are formed on both sides of crosspiece materials 1 through aluminum fabrication and cross sections are formed to an H shape, and through-holes 4... are bored at regular intervals to the side edges 3... and a circular punch is inserted and pressed and the through-holes 4... are expanded. Protruding sections 5... are shaped to the external side faces of the through-holes 4... of the crosspiece materials 1 and the through-holes 4... are formed to a circular shape, and other crosspiece materials 2... composed of an alumi num wire rod are inserted into the through-holes 4... and the protruding sections 5... are pushed from the outside. The trough sections of both crosspiece materials are cut off and protrusions 8... are used, the side edge end sections of the crosspiece materials 1... are fitted, and external frames 5 by pushing and deformation from the outside are fixed to the crosspiece materials 1... in the side edges 3.... Accordingly, the surface and the rear are formed to the same shape and a grating body can be used at the position of the outside of the boundary line of an adjacent land.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method for manufacturing a lattice body for use in fences, gates, partitions, handrails, and the like.

PRIOR TECHNOLOGY This type of lattice body is made by arranging crosspieces perpendicularly and welding the intersecting points, but the assembly work is complicated and the welded parts are built up irregularly. In addition, with galvanized or other anti-corrosion treatment, which is widely used these days, the rust-prevention layer on the surface disappears due to the heat during welding, resulting in short-term damage. There were some problems, such as rust forming.

When assembling a lattice body using pipe-shaped crosspieces, a through hole is bored in one crosspiece, a thin-walled part is formed in the other crosspiece to be inserted into the hole, and both pillars are inserted into the hole. A method is known in which troubles caused by welding are avoided by pressing and deforming the thin-walled portions of the mating beams to integrate them. (Special public Showa 5B-
No. 20686, No. 61-32098 and No. 62-11
933 Publication) Problems to be Solved by the Invention The present invention simplifies work and improves aesthetics and durability by assembling without welding when manufacturing a lattice body using wire materials as crosspieces. It was planned.

Means for Solving the Problems In view of the above circumstances, the inventors of the present invention, as a result of careful frugality, have developed a method for manufacturing a lattice body in which a plurality of crosspieces are arranged orthogonally and their intersecting positions are fixed. In this method, a non-circular through hole with a smooth inner surface is bored in a crosspiece arranged in one direction, the through hole is pushed out from the inside to make a circular shape, and a cross section circular cross section is inserted into the through hole. After insertion, the intended purpose is achieved by pressing the protruding parts of the crosspieces that have formed the through holes, and fixing the intersecting crosspieces.

In carrying out the method of the present invention, an aluminum molded material is suitable as the crosspiece in which through holes are to be provided, and in order to form non-circular through holes in the crosspiece, shearing may be performed using a pressurizer. Although the most desirable shape of the hole to be drilled in the crosspiece is oval, it may be oval or fan-shaped, as long as the inner surface of the pond is smooth.

When carrying out the present invention, when deforming a non-circular hole drilled in a crosspiece into a circular shape, a tapered circular punch is passed through the crosspiece until the outer surface of the crosspiece at the hole position is raised. It should be inserted into the hole and forced to widen the hole.

According to the method of the present invention, a non-circular through hole with a smooth inner surface is bored in the crosspiece, and the through hole is expanded until the outer surface of the crosspiece is raised to form a circular shape. Because it is made by inserting a cross-section crosspiece and pressing the raised part of the cross-section,
If the crosspiece is plastically deformed so that the raised parts of the crosspiece become smooth, an extremely large stress will be generated between the through hole and the circular cross-section crosspiece, creating strong contact resistance and making both materials rigid. It can be fixed, and since it is sufficient to press the crosspiece until the raised part becomes smooth, there is no damage or distortion on the pressed surface, and the aesthetic appearance can be avoided.

Example When assembling a lattice body by arranging crosspieces (1), (1), etc. and crosspieces (2), (2), and fixing their intersecting positions, the crosspieces (1) (1)... ) (1)... are made of IJ pear-shaped cross section with side edges (3) (3) formed on both sides by aluminum molding process, and crosspieces (1) (1)...
Oval shaped through holes (4) (4)... are bored at a predetermined interval between the side edges (3) (3), and then the through holes (4) (4) are tapered. Insert a circular punch and apply pressure to create a raised part (
5) Push and expand until (5) is formed, and open the through hole (4) (4)
After making... into a circular = 5- shape, circular through holes (
4) Push through the other crosspiece (2) (2) made by cutting an aluminum wire into (4)..., and insert the crosspiece (1) (
1) Press the raised portions (5) of (5) from the outside until the outer surface of the crosspiece becomes smooth, fixing both sides together and fixing the crosspiece (1). (1) Outer frame (8) made of aluminum molded material with the valleys cut out at both ends and protrusions (7) with locking edges (6) on the inside (8)
Attach the crosspieces (1) (1) to the protrusions (7) of the outer frame (8) using
Fit the side edge ends of... and attach the crosspieces (1) (1)...
Press and deform the side edges (3) (3) from the outside to form the outer frame (5).
) and crosspieces (1) (1)... are fixed.

Effects of the Invention According to the present invention, welding can be omitted when joining orthogonal crosspieces, so the appearance and durability can be improved, and since screw heads are not required, assembly work is significantly reduced. It can be manufactured at a low cost and is suitable for use outside the border of neighboring land because the crosspieces perpendicular to the center of one crosspiece pass through and the front and back sides have the same shape.

[Brief explanation of the drawing]

The drawings are an example showing an embodiment of the method of the present invention, and FIG. 1 shows a front view of the lattice body, FIG. 2 shows a side view, and FIGS. 3 to 5 show enlarged side views of main parts of the crosspiece. .

Claims (1)

[Claims] (1) In a method for manufacturing a lattice body in which multiple crosspieces are arranged perpendicularly and their intersecting positions are fixed, non-circular holes with smooth inner surfaces are bored in the crosspieces arranged in one direction. The through hole was pushed open from the inner surface to make it circular, and after inserting a cross-sectional crosspiece into the through hole, the raised part of the crosspiece that had formed the through hole was pressed to fix the intersecting crosspieces. A manufacturing method for lattice bodies that is characterized by: