JPS628592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a box that is the main body of a fireproof safe.

Conventionally, fireproof safes have been made with a vertical rectangular cylindrical body, and as shown in Figure 2, a single steel plate is made with notches 7 at each corner, and then bent in the same direction along the folding line. Furthermore, as shown in FIG. 2, each corner was welded using gas or electricity, the completed front and rear plates were fitted inside the outer body, and the fitting portions were welded.

However, such a structure requires many manufacturing steps and is time-consuming, making it extremely inefficient.

In other words, when forming the top and bottom plates, cut notches at each corner of the steel plate, bend it further, weld each corner, sand the welded area, sand it, and then sharpen it with putty. The complicated work of molding was required.

Furthermore, as shown in Japanese Utility Model Publication No. 49-45993, for example, the frame plate is formed into an angular cross-sectional shape by integrally connecting the bent edges with stepped portions for edge attachment, and the back plate of the safe case is A container base body formed by integrally connecting inwardly bent edges with mounting steps by pressing, etc., and integrally forming all other surfaces of the safe container except for the front and back portions. Stepped parts are integrally formed on the front and rear peripheral edges of the base body by press working, and the frame plate and the back plate are respectively fitted into both openings of the base body, and spot welded at their overlapping parts, and an angular cross-sectional shape is formed. An aluminum or synthetic resin edge that integrally contacts the filler material for the gap formed by both end edges of the container base and the stepped portions of the frame plate and the back plate is attached to the front part of the safe container. A configuration in which the device is fitted to the peripheral edge and the rear peripheral edge is known.

However, in the above structure, since the frame plate and the back plate are fitted from the inside, irregularities are likely to occur when welding them together, and the structure is complicated, such as requiring a filler piece.

Therefore, the present invention reduces the number of component parts and
This invention provides a box for a fireproof safe that can be molded with a few and simple installation steps, and will be described in detail below with reference to the drawings.

As shown in the exploded perspective view of FIG.
Front plate fitting part 2 with an angular cross section with a step on the inside
In the rear part, similarly to the front part, a step is provided inward to form a rear plate fitting part 3 with an angular cross section. The outer periphery of a large steel plate with a slightly larger area than the outer main body 1 is bent in the same direction by a drawing method, and a front plate 4 with a door mounting window 6 is attached to the front plate fitting part 2.
The part where the step and the front plate 4 are in contact is gas or electric welded.

The rear plate 5, which is made by bending the outer peripheral part of a steel plate of the same shape in the same direction as the front plate 4, is fitted into the rear fitting part 3 of the outer main body 1, and the step and the rear plate 5 are in contact with each other. Weld the parts.

Inset portions formed on both sides of the outer body 1 (i.e.
The front plate fitting part 2 and the rear plate fitting part 3) have symmetrical shapes, and one of them is used as the front plate fitting part 2 and the other as the rear plate fitting part 3. The plates 5 are fitted from the outside, and the portions in contact with the steps are welded as described above to form the outer main body 1, which is an example of a box for a fireproof safe.

The present invention is the above-mentioned method, and its features will be listed below.

(a) The front plate 4 and the rear plate 5 are formed by bending the edges of a single steel plate using a drawing method, so there is no need for welding (gas or electric).

(b) Therefore, there is no need to use a sander, and there is no need to file or paper finish.

(c) Since the front and rear plates are fitted from the outside, there are no unevenness, there is no variation due to high temperatures during welding, and there is no need to sharpen the surface with putty.

(d) Since the fitting part of the outer body, which becomes the trunk main body, has a symmetrical shape, either one can be used as the front plate fitting part 2 or the rear plate fitting part 3, and special connecting members are required during assembly. Since no installation is required, the installation process can be minimized, and anyone can easily assemble it without requiring any skill.

As described above, the present invention eliminates the manufacturing process of conventional fireproof safes, and enables the safe to be provided at low cost without sacrificing its effectiveness.

Further, although this embodiment is a method for manufacturing the outer main body, this manufacturing method can also be used for the inner main body since it has a similar structure.

Fireproof safes are indispensable in Japan, where the fire rate is high due to buildings, interior materials, etc., and the present invention is an excellent method that can meet the demand and provide them in large quantities at a lower cost. .

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the outer main body, FIG. 2 is a diagram showing an example of a conventional method for molding a rear plate, and FIG. 3 is a diagram showing a molding method according to the present invention. 1 is the outer body, 2 is the front plate fitting part, 3 is the rear plate fitting part, 4 is the front plate, 5 is the rear plate, 6 is the door mounting window, 7 is the notch, 8 is the folding line, 9 is the welding part shows.

Claims (1)

[Claims] 1. The outer periphery of a rectangular plate-shaped steel plate is bent using a draw forming method to form a front plate that will become a frame plate and a rear plate that will become a back plate, and both sides of a hollow rectangular prism-shaped body main body that is open on both sides. In the case of a fireproof safe, the front plate and the rear plate are fitted from both sides and welded to the fitting parts, and the front plate and the rear plate are fitted and welded to the fitting parts, respectively. The fitting parts have a symmetrical shape, and one of them is used as a front plate fitting part and the other is used as a rear plate fitting part, and the front plate and the rear plate are respectively fitted from the outside, and the part in contact with the step A fireproof safe box body characterized by welding.