JPS6120190Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an eaves gutter, and more particularly to an eaves gutter in which both the inner and outer surfaces of the metal gutter obtained by bending a perforated metal plate are coated with a synthetic resin layer.

In general, the larger the aperture ratio of the holes in the metal plate, the more firmly the inner and outer synthetic resin layers that cover both the inner and outer surfaces of a metal gutter formed from a perforated metal plate are bonded together through the holes. On the other hand, if the aperture ratio is made too large, there is a problem in that the reinforcing effect of the metal plate decreases. This invention was devised to overcome the above problems by focusing on the fact that the strength of eaves gutters is mostly supported by the ears.The main purpose of this invention is to strengthen the metal plate. To provide an eaves gutter that can increase the bonding strength of synthetic resin layers coated on both the inner and outer surfaces of a metal plate without reducing the overall strength.

The present invention will be explained in detail below based on embodiments shown in the figures. The eaves gutter according to the present invention includes a perforated metal plate having a shape in which an ear part 2 having a substantially C-shaped cross section and opening inwardly protrudes from the upper end of a gutter-like part 1 having a substantially U-shaped cross section and opening at the top. Both the inner and outer surfaces of the metal gutter 4 obtained by bending the metal gutter 3 are covered with synthetic resin layers 5, 5 over the entire surface, and the aperture ratio at the ear part 2 due to the hole is smaller than the aperture ratio at the gutter-like part 1. In this embodiment, the size of the hole 2a in the ear part 2 is made smaller than the size of the hole 1a in the gutter-like part 1, as shown in the figure. An example is shown in which the aperture ratio of the trough-like portion 1 is smaller than that of the trough-like portion 1.
As the perforated metal plate 3, a strip-shaped steel plate called steel paper is used, and as shown in FIG. 2, the holes 1a and 2a are uniformly formed.
Vinyl chloride is used as the synthetic resin layers 5, 5 that cover both the inner and outer surfaces of the metal gutter 4, and each hole 1a, 2 described above is
a, and are firmly connected to the metal gutter 4 through the ears 2 and the gutter-like portion 1 without using an adhesive. Moreover, this synthetic resin layer 5
As shown in the figure, it is continuous at a portion extending over the upper and lower ends of the ear portion 2, and the opening of the ear portion 2 is closed to form a hollow portion in this portion. In addition, in the above embodiment, the ear portion 2
Although an example has been shown in which the sizes of the holes 1a and 2a in the trough-like part are changed to make the aperture ratio of the ear part 2 smaller than the aperture ratio of the trough-like part 1, the present invention is not limited to this. Instead, it is of course possible to keep the sizes of the holes in the ear portion 2 and the gutter-like portion 1 constant and change the number of holes to make a difference in the aperture ratio.

As described above, in the present invention, the opening ratio at the ears of the metal gutter is smaller than that at the gutter-shaped part, so that the synthetic resin layer covering both the inner and outer surfaces of the metal gutter is Although it is firmly connected through each hole in the ear part, the reinforcing effect at the ear part is not impaired.
This has the advantage of effectively reinforcing the eaves gutter, on which the overall strength depends on the ears, and increasing the bonding strength of the synthetic resin layer covering the entire metal gutter including the ears.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention, FIG. 2 is a partial perspective view showing a perforated metal plate used in the same, and FIG. 3 is a partial sectional view of the same.
2 is a gutter-like part, 2 is an ear part, 3 is a perforated metal plate, 4 is a metal gutter, and 5 is a synthetic resin layer.

Claims (1)

[Scope of utility model registration request] A metal gutter obtained by bending a perforated metal plate into a shape in which an ear portion having an approximately C-shaped cross section and opening inwardly protrudes from the upper end of the gutter-like portion having an approximately U-shaped cross section that is open at the top. An eaves gutter whose inner and outer surfaces are completely covered with a synthetic resin layer, and the opening ratio at the ears of the holes is smaller than the opening ratio at the gutter-like parts.