JPH0481036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a metal flush door that is suitable for mass production and has a good finish.

[Conventional technology]

Traditionally, metal flush doors use the inner frame as the core material, and two panel boards, front and back, are attached and welded to both sides of the inner frame, and then the wood edges are finished or a decorative edge is attached to finish the wood edges. Manufactured flush doors.

[Problem that the invention seeks to solve]

According to the above-mentioned conventional technology, mass productivity is poor because it requires a process of welding the two large-area front and back panels to the inner frame and a process of decoratively finishing the wood ends.
There were also problems such as distortion of the panel plates due to welding.

The present invention has been made to improve the above-mentioned conventional problems, and its purpose is to:
To provide a method for manufacturing a metal flush door which improves mass productivity by omitting the process of bonding and welding two large-area front and back panel plates and the process of decoratively finishing the end of the wood, and has good finishing accuracy.

[Means for solving problems]

In order to achieve the above object, the present invention forms a round thin-walled metal pipe into a hollow panel shape with a flat rectangular cross section, and integrally forms the panel plates on the front and back sides of the flat door and the ends on both sides, and the hollow part A metal flush door is manufactured by inserting and fixing an inner frame into the metal frame.

[Effect]

Therefore, in the manufacturing method of the present invention, the two front and back panels and the ends on both sides are integrally molded from a round thin-walled metal pipe of a predetermined size, so it is not only suitable for mass production, but also has excellent finishing accuracy. Moreover, it is possible to omit the decorative finishing of the wood end.

〔Example〕

The present invention will be explained below based on illustrated embodiments.
1 to 3 are perspective explanatory views showing the manufacturing method of the present invention, and reference numeral 1 in FIG. 1 is a round thin-walled metal pipe material made of mild steel or light alloy having a predetermined diameter. This pipe material 1 is molded into a hollow panel 2 with a flat rectangular cross section as shown in Fig. 2 by using a suitable molding machine such as a roll molding machine or a press molding machine. The wood end 2c and the wood end 2c are integrally formed. The pipe material 1 may be produced in batches by cutting pieces into dimensions equal to the height of the doi and press-forming them, but in the case of large-scale production, the end of a long strip coil having a predetermined width is pulled out and rolled, rolled, and the joints are formed. The pipe material 1 is completed by electric welding, and then it is continuously formed into the hollow panel 2 shape shown in Fig. 2 using a roll forming machine, and the formed material is successively cut into regular lengths.Continuous production. By adopting this method, mass production is possible.

On the other hand, the inner frame 3 shown in FIG. 3 is manufactured in a separate process.
The middle frame 3 is made by assembling channel-shaped vertical frames 3a, 3a and upper and lower frames 3b, 3b into a frame shape by electric welding or the like.
Reinforced door block 3c at the corner and door lock part,
3c is welded. This middle frame 3 is inserted into the hollow part of the hollow panel 2, and the two are fixed together by spot welding or the like. After that, paint, door lock,
Complete the flash door by attaching door hardware such as hinges.

[Effects of the Invention] As detailed above, according to the present invention, the panel plates on the front and back sides of the flush door and the ends on both sides are integrally formed by molding a round thin-walled metal pipe. The process of attaching and welding the two large-area front and back panels to the inner frame and the process of finishing the wood ends can be omitted, and an integrated continuous production method from raw materials to finished products can be adopted, making mass production possible. This method has excellent effects such as not only making it possible to significantly reduce the cost of the product, but also making it possible to significantly improve the finishing accuracy of the product without variation.

[Brief explanation of the drawing]

The drawings show an embodiment of the manufacturing method of the present invention.
The figure is a perspective view of the pipe material, Figure 2 is a molded hollow panel, and Figure 3 is a perspective view of the inner frame. 1... Pipe material, 2... Hollow panel, 2a,
2b... Panel board, 2c... Wood end, 3... Middle frame,
3a...vertical frame, 3b...upper and lower frame, 3c...door block.

Claims (1)

[Claims] 1. Manufactured by molding a round thin-walled metal pipe into a hollow panel shape with a flat rectangular cross section, integrally forming panel plates on the front and back sides of the flat door and the ends on both sides, and inserting and fixing the inner frame into the hollow part. A method of manufacturing a metal flush door.