JPH09252921A - Body structure of letter box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give a soft image to a letter box improved in the working productivity. SOLUTION: A tubular body 10 is formed of a body 1 and bottom plate 2, and a rear plate 3 is attached to a rear opening part to provide the body structure of a box-shaped letter box. Corner parts 11 of the tubular body are bent roundly. The body 1 and the bottom plate 2 are connected to each other by seam working and the rear plate 3 connected on the end edges to the body 1 and bottom plate 2 by curling working of on insert B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mail box structure. More specifically, the present invention relates to a new mail box main body structure having a soft appearance and excellent processing productivity.

[0002]

2. Description of the Related Art As shown in FIG. 10, for example, a mail box is usually formed into a cylindrical body by a main body (1) and a bottom plate (2), and a back plate (3) is attached to a rear opening. A box-shaped main body structure is formed, and then a front plate provided with a mail inlet, a name plate, a door phone handset, a monitor camera, and the like is attached to the front opening (4).

[0003]

However, as shown in FIG. 10, the conventional mail box has sharp corners (5) in its body structure, and is made of stainless steel or iron plate. There is a problem that a cold and hard feeling is given by sheet metal processing. This is because the mutual connection of the main body (1) with the bottom plate (2) and the back plate (3) is performed by spot welding, riveting or the like, so that the edge edges (6) of each member are exposed. And this was because they gave a sharper, cooler feel.

Further, spot welding and riveting for assembling are not always desirable in terms of productivity, and a simpler and more cost-effective measure has been desired. In such a situation, it is considered that the corners of the main body structure are rounded, but this is not so easy in practice, and the end edge portion (5) of each member is not exposed. Improving productivity has been a very difficult task.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides a box-shaped body having a cylindrical body formed by a main body and a bottom plate, and a back plate attached to a rear opening. The main body structure of the postal box which was made, the corners of the cylindrical body were rounded and curved, and the main body and the bottom plate were joined by brazing, and the back plate was attached to the main body and the bottom plate. The present invention provides a main body structure of a mail receiving box characterized by being rolled and joined at its edge by curling.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The mail box body structure of the present invention is
With the configuration as described above, a much softer image appearance than in the past is realized, and furthermore, the end edge portion of the member is not exposed and the processing productivity is improved. Hereinafter, examples will be shown, and embodiments of the present invention will be described in more detail.

[0007]

1 is a perspective view schematically illustrating a mail box main body structure of the present invention, and FIG. 2 is an exploded perspective view thereof. For example, as illustrated in FIGS. 1 and 2, a main body (1) and a bottom plate (2) form a cylindrical body, and a back plate (3) provided with a door for taking out mail is attached to the rear opening. When configuring the main body structure of the mail box as a box shape, it is assumed that the corners (11) of the tubular body (10) are curved with a roundness, and both the main body (1) and the bottom plate (2) are The edges of the back plate (3) are joined to the main body (1) and the bottom plate (2) by curling at the edges thereof.

In the brazing process, for example, the lower end edge (101) of the main body is bent inward and upward, and this is bent outward and downward of the bottom plate (2), as shown in an enlarged manner as part A in FIG. The edges (201) are overlapped so as to bite each other, so that each edge (101)
(201) is not exposed, and can be joined without employing any conventional means such as spot welding or riveting.

In the winding joining by the curling process, for example, the rear end edge (102) of the main body (1) is bent outward and upward as shown in an enlarged manner as a portion B in FIG.
The edge (301) of the back plate (3) is wound around and joined thereto. The same applies to the rear edge of the bottom plate (2). Also in this case, the edges (102) and (301) are not exposed, and are joined without any spot welding or riveting.

FIGS. 3, 4 and 5 show a mail box main body structure of the present invention as a more specific example. For example, as shown in the main part front view of FIG. 3, the main body (1) and the bottom plate (2) are joined at their both edges by a braided assembly (A). And this Figure 3
In the example of (1), as shown in an enlarged manner, a tongue piece (12) for mounting a top plate (not shown) is used to round the corner (11) of the main body (1). It is notched in (11). Also, as shown in the side view of FIG.
The main body (1), the bottom plate (2), and the back plate (3) are wound (B) at their edges by curling. The rear view of FIG. 5 shows the back plate (3).

FIG. 6 and FIG. 7 are a front view and a side view, respectively, of the main body (1). As shown in FIG. 101)
Is bent outward and downward. The bending angle θ at this time can be, for example, about 60 °.
At the corner (11), the tongue piece (12) is notched and rounded.

FIG. 7 shows that the rear end (10) of the main body (1) is used for winding and joining by the curling process.
It can be seen that 2) is bent outward and upward.
And in this example, even by curling and joining by curling, so that the joint does not bulge and become a problem,
It can also be seen that a step (13) is provided at the rear of the body (1).

FIG. 8 is a view exemplifying the bottom plate (2) as a member. As can be seen from FIG. 8, the edge (201) is turned upward inward for the brazing (A) processing. The trailing edge (202) is folded for curling-in winding joining. Further, a tongue piece (22) similar to the tongue piece (12) of the main body is provided at the front.

Then, as shown in the member diagram of the back plate (3) in FIG. 9, the peripheral edge (301) is bent for the winding joining by the curling process. Of course, the present invention is not limited to the above examples. The details can be varied in various ways.

[0015]

As described in detail above, according to the present invention, since the corners of the mail box are rounded and the edge edges are not exposed at the joints of the members, there is no feeling of being cold and hard. It shows a soft appearance, and does not require spot welding, riveting, etc., and only sheet metal processing makes it possible to manufacture with better productivity and at lower cost.

[Brief description of drawings]

FIG. 1 is a perspective view schematically illustrating a main body structure of the present invention.

FIG. 2 is an exploded perspective view corresponding to FIG.

FIG. 3 is a main part front view illustrating a main body structure as a specific example;

FIG. 4 is a side view corresponding to FIG. 3;

FIG. 5 is a rear view corresponding to FIGS. 3 and 4;

FIG. 6 is a main part front view illustrating a main body as a member.

FIG. 7 is a side view corresponding to FIG. 6;

FIG. 8 is a front view, a bottom view, and a side view illustrating a bottom plate as a member;

FIG. 9 is a side view and a front view illustrating a back plate as a member.

FIG. 10 is a perspective view illustrating a conventional main body structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Bottom plate 3 Back plate 4 Front opening part 5 Corner part 6 Edge edge part 10 Cylindrical body 11 Corner part 12 Tongue piece part 101 Main body edge 102 Main body rear edge 201 Bottom board edge 202 Bottom board rear edge 301 Back Board edge

Claims (1)

[Claims] 1. A main body structure of a mail box in which a main body and a bottom plate form a tubular body, and a back plate is attached to a rear opening to form a box shape, and the corners of the tubular body are rounded and curved. In addition, the main body and the bottom plate are joined together by a brazing process, and the back plate is wound and joined to the main body and the bottom plate by curling at their edges. Body structure.