JPS60200029A - Manufacturing method of oven storage for heating cooker - Google Patents

Abstract

PURPOSE:To facilitate a manufacturing of an oven housing by a method wherein an end flange of a sheet of plate is bent in a U-shaped form to make a groove therein, another plate is inserted into the groove to assemble it into a box-like form and then the U-shaped flange is deformed in a direction perpendicular to its inserting direction to connect them to each other. CONSTITUTION:A connected edge flange 21b at a rear plate 25 of a side surface 21 of a barrel plate 23 is bent to form a U-shape as well as a groove 21c, a groove 22c is formed at a rear end of a bottom surface 22 in the similar manner, a goove 24c is also formed at both right and left edges of a top plate 24 and a groove 25c is formed at the top edge of the rear plate 25, respectively. A flange 21a of the barrel plate 23 is inserted into the groove 24c of the top plate 24, then the rear plate 25 is inserted into the groove 21c, the lower edge of the rear plate 25 is inserted into the groove 22c and the flange 24a of the top plate 24 is inserted into the groove 25c of the rear plate 25, respectively. Then, each of the U-shaped flanges 21b-25b is pressed to form a semi-spherical projected part 26 in a direction perpendicular to its inserting direction to connect them to each other. With this arrangement, its manufacturing is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field J This invention relates to a method of manufacturing an oven chamber for a heating cooker.

[Prior art j] Conventionally, when manufacturing oven cabinets for heating cookers such as microwave ovens, the edges of two plates are overlapped and folded together, so-called seam-folding joining, and the seam-folded portion is It is known to form stamps or extrusions by pressing to further strengthen the bond. However, with this method, the two plates are not fixed to each other until they are joined together, making it troublesome to hold the plates and making manufacturing difficult.

[Purpose] The present invention solves the above-mentioned conventional drawbacks and makes it possible to easily manufacture an oven cabinet.The present invention is to solve the above-mentioned conventional drawbacks and make it possible to easily manufacture an oven cabinet. The other plate is inserted completely into the box to assemble it into a box shape, and then the U-shaped flange is deformed in a direction perpendicular to the insertion direction and the two plates are joined to produce an oven constriction.

[Example] Detailed explanation will be given below according to the drawings. In Fig. 1, 1 is an outer box of a microwave oven, 2 is an oven compartment in which food is placed, 3 is a front plate having a food entry/exit opening 3a leading to the inside of the oven compartment, 4 is a door that can be opened and closed to cover the food entry/exit opening 3a.

The oven chamber 2 includes a body plate 23 forming side surfaces 21 and a bottom surface 22, a top plate 24 forming an upper surface, and a rear plate 25 forming a rear surface.

At the upper ends of the pair of side surfaces 21 of the body plate 23, that is, at the joints with the top plate 24, there are flanges 21 that project horizontally outward.
At the rear end, that is, at the joint with the rear plate 25, the outwardly projecting flange 21b is folded back inwardly into a U-shape to form a groove 21C that is open inwardly and upwardly. Further, at the rear end of the bottom surface 22 of the body plate 23, a flange 22b is similarly bent into a U-shape to form a groove 22c that is open inward.

At both left and right ends of the top plate 24, flanges 24b are folded inward to form grooves 24C that are open inward and rearward, and a flange 24a rising upward is provided at the rear end.

At the upper end of the rear plate 25, the flange 25b is folded downward and inward to form an inwardly open m 25 C.

J: Insert the flange 21a on the side surface of the copper plate from the rear end into the groove 24C of the top plate 24 processed into the sea urchin shape, slide the top plate 24 backward along the upper edge of the body plate 23, and then open the upper surface of the body plate 23. Cover with top plate 24. Thereafter, insert the left and right ends of the rear plate 25 into the groove 21C at the rear end of the copper plate from its upper end, and insert the lower end of the rear plate into the groove 22c at the bottom of the copper plate, and insert the rear end of the top plate into the groove 25C at the upper end of the rear plate. Insert the flange 24a.

As a result, each plate of the oven chamber is assembled into a box shape.

and the U-shaped flanges 21b, 22b.

Hemispherical extrusion 26 is made by press processing on 24b and 25b.
is formed to protrude in a direction perpendicular to the insertion direction of each of the plates, and is firmly joined.

For the front plate 3, flanges 21d, 22d, and 24d provided at the front ends of the body plate 23 and the top plate 24 are overlapped and spot welded so that the front opening of the A-bun storage 2 coincides with the opening 3a.

As shown in the cross-sectional view of the bent part of each U-shaped flange, that is, the back of the groove, the tip of the U-shaped flange can be crimped against the inserted plate by bending it to a diameter larger than the thickness of the inserted plate. It improves sex and prevents 6 bites.

In the above embodiment, instead of the hemispherical extrusion 26, the sixth
A cut and raised cut 27 may be provided as shown in the figure. Furthermore, it is possible to arbitrarily decide which sides of the oven chamber are to be integrated or joined, for example, by integrating the top plate with the body plate, making the body plate cylindrical, and inserting only the rear plate. I can do it.

[Effect] As described above, according to the present invention, it is possible to assemble a 70-shaped oven cabinet by simply inserting the other plate into the U-shaped flange of one plate, and then to attach the U-shaped flange by pressing or the like. Since each plate can be firmly joined simply by deforming it, the A-bun storage can be manufactured easily.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the microwave oven, Fig. 2 is a perspective view of the oven chamber as seen from the rear, Fig. 3 is an exploded perspective view showing the assembly process of the open oven, and Fig. 4 is the 8th line in Fig. 2. 5 is a sectional view taken along the line B--B in FIG. 2, and FIG. 6 is a sectional view of main parts showing another embodiment. Explanation of symbols 2 is the oven cabinet, 21 is the side surface, 22 is the bottom surface, 23 is the body plate, 24 is the top plate, 25 is the rear plate, 21b, 22
b, 2'4b, 25b are U-shaped flanges, 210,2
20.24G, 25c is vortex, 26 is extrusion, 27 is cut and raised. Patent applicant Katsuji Kawashima, President and Director of Brother Industries, Ltd.

Claims (1)

[Claims] 1. A groove is created by bending the flanges at one end of two adjacent plates out of the plurality of plates forming the oven chamber into a U-shape, and the other plate is inserted into the groove. A method for manufacturing an oven chamber for a heating cooker, which comprises assembling the plates into a box shape, and then deforming the U-shaped flange in a direction perpendicular to the insertion direction to join both plates. 2. The method for manufacturing an oven compartment for a heating cooker according to claim 1, wherein the bent portion of the U-shaped flange is bent to have a diameter larger than the thickness of the other plate.