JPH0996066A - Square-shaped elbow made of metal for rain gutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of corrosion by molding an elbow formed in a square cylindrical shape, in which a cross section is formed in a square shape or a rectangular shape, and formed in a shape bent in an intermediate section and using a continuous plate material having no joints as a rear section as the bent external angle side. SOLUTION: A side plate 13, in which both side ends of the outside plate 1 of one developed metal plate are cut obliquely, is disposed in upright, and an inside plate 12 is bent at an approximately right angle from the edge of the side plate 13. On the other hand, an end section on the water lower side is formed in a symmetrical shape so as to be oppositely faced to the water upper side, a stepped section in material thickness is formed and a connecting cylinder 14 is extended and cut, and a bent edge section is welded C and connected, thus molding an elbow A. Leaders are joined with the water upper side and water lower side of the elbow A, and a continuous plate material having no joint and welding section in a rear section, on which at least water flows. Accordingly, the generation of corrosion due to the retention of rainwater and dust can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal rectangular elbow for rain gutters to be installed on the wall surface of a building.

[0002]

2. Description of the Related Art Conventionally, it has been well known that a building made of resin such as vinyl chloride or a metal structure is often used as a rainwater in a building. Many things are used. This may increase the length of the vertical rail and cause problems such as thermal expansion and contraction. Therefore, a strong metal vertical rail and elbow are combined to allow rainwater to flow down. However, on the other hand, metal rain is strong, but since it is made of metal, problems such as corrosion are likely to occur.

That is, the elbow is installed outside the building, is exposed to wind and rain and direct sunlight for a long period of time, and acid rain, dust, dust and the like are likely to accumulate, which easily causes corrosion, which causes corrosion. On the other hand, durability is also required.

On the other hand, the conventional metal elbow is manufactured by abutting the ends of short pipes obtained by cutting a metal plate into a tubular shape and connecting the connecting portions by welding or the like.

That is, one end edge of a rectangular short cylinder is cut obliquely to adjust the angle, and the end edges are abutted to each other to be connected by welding. Therefore, a welded portion is formed so as to cross the elbow and the rainwater crosses the welded portion wherever it flows, and this portion is vulnerable to corrosion by rainwater or dust.

[0006]

As described above, in the conventional metal rain elbow elbow, the ends of the rectangular tubular shape are cut obliquely and the ends are connected by welding or the like, so that corrosion easily progresses. It was a thing. Since this welded part was once heated with high heat and melted the metal material, the metal structure was also changed and corrosion was likely to proceed, and the corner part of the outer plate where rainwater always flows was also significantly corroded. . If such corrosion progresses, water leakage may occur and the rain gutter must be replaced.

[0007]

In order to solve the above-mentioned problems, the invention according to the present invention has a structure in which no welded portion is used in a portion through which rainwater passes, and at least at the surface on the outer angle side of the elbow. A certain outer plate is made into a continuous plate material, which is simply processed by bending. Therefore, unlike the prior art, since no welded portion is provided in the portion where rainwater flows, the occurrence of corrosion can be suppressed.

[0008]

[Operation] Since at least the connecting portion and the welded portion are bent only on the back surface where water flows, corrosion can be prevented even in a place where rainwater or the like is constantly flowing or dust is accumulated, and long-term It withstands the use of.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the accompanying drawings. FIG. 1 is a perspective view of an elbow A according to the present invention, and FIG. 2 is a side sectional view thereof. The elbow A is formed by forming a metal plate such as a stainless steel plate and has a material thickness of 0.6 m.
Those of about m to 1 mm are suitable.

This prismatic elbow A is raised B on the water side.
Etc. are connected and the direction is changed from the underwater side for drainage. At this time, the outer plate 1 on the outer corner side in the illustrated example is always provided with a rainwater flow passage, so that the welded portion C is not provided. .

That is, as shown in FIG. 2, a side plate 13 in which one end of both side shells of the outer plate 1 is obliquely cut is erected on one expanded plate material, and the inner plate 1 is further extended from the edge of the side plate 13.
2 is bent at a substantially right angle. On the other hand, the end on the underwater side is formed symmetrically so as to face the above water side,
In addition, the connecting cylinder 14 is extended by providing a step of material thickness.

In order to form the shape of the elbow A, in the illustrated example, the outer plate 1 is continuously formed at the bending line 11 of the bent portion. The elbow A is formed as shown in FIG. 1 by bending each of them and welding and connecting the edge portions thereof.

At this time, in order to connect to the vertical rail B on the underwater side, a connecting tube 14 having a stepped portion corresponding to the material thickness and reduced in diameter is extended, and the vertical vertical rail is connected thereto. It connects and works, and rainwater flows down. The connection tube 14 is designed in consideration of the appearance after construction, and it is not particularly necessary in terms of function, and even a continuous tube-like shape can be used by connecting a ledge adapted to its size.

The bending angle of the elbow A is 10 in the illustrated example.
Although it is formed with an angle of about 5 degrees, it is natural that the angle of the inclined portion of the side plate can be changed with a similar idea such as 90 degrees other than this angle.

[0015]

As described above, the metal rectangular elbow according to the present invention does not have a seam or a welded portion at least on the back side which is the outer corner side of the elbow in which rainwater easily flows. Therefore, as compared with the conventional welding method, the occurrence of corrosion due to the accumulation of rainwater and dust is less, and even if it occurs, the progress can be prevented. Therefore, it can be used for a long period of time, and since it is made of metal, it has sufficient strength.

In this embodiment, the outer plate is continuously formed, but depending on the location of use of the elbow, the same effect can be obtained by connecting the inner plate with a fold line.

[Brief description of drawings]

FIG. 1 is a perspective view of a metal elbow according to an embodiment of the present invention,

[Fig. 2] is a perspective view of the same metal elbow when unfolded,

FIG. 3 is a side cross-sectional view of the same metal elbow to which a vertical rail is connected for construction. A ... Elbow B ... Vertical C ... Welded part 1 ... Outer plate 11 ... Folding line 12 ... Inner plate 13 ... Side plate 14 ... Connection tube

Claims (2)

[Claims] 1. An elbow having a square or rectangular cross-section with a square or rectangular cross section and bent in the middle of the direction of flow of rainwater, at least the back surface of the bent outer corner is continuous without a seam. A square elbow made of metal for rain gutters, which is characterized by being made of a plate material. 2. A square elbow made of metal for rain gutters according to claim 1, wherein a single expanded metal plate is bent to form a substantially rectangular tube shape.