JPH0322295B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an eaves gutter in which a metal plate is inserted.

Various types of eaves gutters in which metal plates 8 such as copper plates are inserted have been provided because of their excellent strength. As shown in Fig. 1a, a metal plate 8 is inserted into a flat synthetic resin plate 9 to form a blank plate 10 for eaves gutters, and then the eaves gutter is formed by roll forming as shown in Fig. 1b. It is formed into a gutter shape.
However, since the main body part of the eaves gutter has a simple shape, it can be relatively easily formed even with the blank plate 10 for eaves gutter with the metal plate 8 inserted, but the shape of the ear part 11 is complicated. Therefore, it is necessary to perform the molding finely, and the moldability is poor.In particular, since the metal plate 8 is inserted, the rectangular ear part 1
1 is difficult to form, and the bent portion inevitably becomes rounded, making it impossible to form an accurately angular ear portion 11.

The present invention has been made in view of the above-mentioned points, and provides an eaves gutter with inserts of metal plates that can easily form precisely square ears without impairing the reinforcing effect of the ears. The purpose is to provide a manufacturing method.

In the present invention, a wide metal plate 2 for the main body is inserted in the central part in the width direction of the synthetic resin plate 1 over the entire length in the longitudinal direction, and both ends of the synthetic resin plate 1 in the width direction are inserted on both sides of the metal plate 2 for the main body. metal plate 3 for narrow ears;
3 is inserted over the entire length in the longitudinal direction to form a blank plate 4 for eaves gutter, and the blank plate 4 for eaves gutter is bent into the eaves gutter shape at the 2 parts of the main body metal plate to form the eaves gutter main body 5. At the same time, both ends of the eaves gutter blank plate 4 in the width direction are bent into a U-shape outside the eaves gutter main body 5 at parts other than the main body metal plate 2 and the ear metal plates 3, 3. to form a square ear part 6, and this square ear part 6
The above object has been achieved by a method for manufacturing an eaves gutter, which is characterized in that the bent tip of the eaves gutter is bent upward and the upwardly bent piece 7 is stacked and fixed on the outer surface of the eaves gutter body 5. This will be explained in detail by way of examples.

Fig. 2 shows a raw plate 4 for eaves gutters used in the present invention, in which a wide metal plate 2 for the main body and a narrow metal plate 2 are used when extrusion molding a thermoplastic hard synthetic resin plate 1 such as hard polyvinyl chloride. It is formed by inserting metal plates 3, 3 for the ears over the entire length in the longitudinal direction. As the main body metal plate 2 and the ear metal plate 3, a thin strip steel plate or the like is used. The above eaves gutter blank plate 4 is roll-formed into an eave shape using the metal plate 2 for the main body to form the eaves gutter main body 5, and then both end portions of the eaves gutter blank plate 4 are shown in FIG. 4a. A rectangular eaves gutter as shown in FIG. 3 is obtained by bending the parts other than the main body metal plate 2 and the ear metal plate 3 to form square ears 6. At this time, the bending process for forming the ear portion 6 can be performed by bending the synthetic resin plate 1 in the portion where the metal plate 2 for the main body and the metal plate for the ear portion 3 are not inserted. The bending process can be easily performed by applying heat, etc., and since the main body metal plate 2 and the ear metal plate 3 are not bent, the bending process can be performed accurately into a square shape without roundness. It is something that can be done.
Also, here, the portion of the bending end of the ear portion 6 where the metal plate 3 for the ear portion is not inserted is bent upward, and this upwardly bent piece 7 is attached to the upper outer surface of the eaves gutter body 5 with adhesive. It is fixed by adhesion or welding by high frequency heating. FIG. 4b shows another embodiment in which the bent portion of the ear portion 6 is made of a soft thermoplastic resin 12 such as soft polyvinyl chloride to facilitate the bending process of the ear portion 6. be. In this embodiment, three metal plates 3 for ears are inserted into each side end of the synthetic resin plate 1, and one metal plate 3 for ears is present on each of the upper, lower, and vertical pieces of the ear 6. It was designed to do so.

Furthermore, according to the present invention, as shown in FIGS. 5a and 5b, eaves gutters of various sizes can be formed by forming the blank plate 4 for eaves gutters using metal plates 2 for the main body having various width dimensions. It can be molded.

As described above, in the present invention, both ends in the width direction of a blank plate for eaves gutters, which is formed by inserting a metal plate for the main body and a metal plate for the ears into a synthetic resin plate, are connected to the metal plate for the main body. Since the square ears are formed by bending the parts other than the metal plate for the ears, the synthetic resin plate part can be easily bent by applying heat, and the metal plate for the main body can be easily bent. Since it does not involve bending the plate or the metal plate for the ears, it is possible to accurately bend it into a square shape without making it round. In addition, a metal plate for the ears is inserted into the ears, and the bent end of the ears is bent upward, and this upwardly bent piece is stacked and fixed on the outer surface of the eaves gutter body, resulting in a double overlap. Since the portions are formed as ears, the strength of the ears is high, and the reinforcing effect of the ears does not deteriorate in any way.

[Brief explanation of the drawing]

Figures 1a and b are a partially cutaway perspective view and a cross-sectional view of a conventional example, Figure 2 is a partially cutaway perspective view of a blank plate for eaves gutters according to the present invention, and Figure 3 is a cross-section of an eaves gutter manufactured from the above. Figures 4a and 4b are enlarged sectional views of the ears of the eaves gutter, and Figs. 5a and 5b are sectional views showing blank plates for the eaves gutter. 1 is a synthetic resin plate, 2 is a metal plate for the main body, 3 is a metal plate for ears, 4 is a raw plate for eaves gutter, 5 is the eaves gutter body, 6 is a square ear, and 7 is an upwardly bent piece.

Claims (1)

[Claims] 1. A wide metal plate for the main body is inserted in the center of the width direction of the synthetic resin plate over the entire length in the longitudinal direction, and narrow ear parts are inserted at both ends of the synthetic resin plate in the width direction on both sides of the metal plate for the main body. A blank plate for the eaves gutter is formed by inserting a metal plate along the entire length in the longitudinal direction, and the blank plate for the eaves gutter is bent into the eaves gutter shape at the main body metal plate portion to form the eaves gutter body. ,
Both ends of the raw plate for eaves gutter in the width direction are bent in a U-shape outside of the eaves gutter main body at parts other than the metal plate for the main body and the metal plate for the ears to form square ears. A method for producing an eaves gutter, which comprises bending the bent end of the ear part upward, and stacking and fixing this upwardly bent piece on the outer surface of the eaves gutter body.