JPS5894555A - Eave trough - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rain gutter, and more specifically, a synthetic resin layer (2) is formed on the entire inner and outer circumferential surfaces of a thin metal plate core material (vine).
This relates to a rain gutter characterized in that the surface of (2) is coated with a weather-resistant paint (3).

Traditionally, rain gutters made of synthetic resin tend to lose their color and luster when exposed to direct sunlight, and for this reason, some have weather-resistant paint applied to the surface. Due to the large expansion and contraction of the rain gutter, the weather-resistant paint on the surface of the rain gutter peels off from the synthetic resin rain gutter body, and when exposed outdoors,
The problem was that it would fall off the gutter body after about a month.

The present invention has been made in view of these conventional drawbacks, and an object of the present invention is to provide a rain gutter that can suppress the peeling of the weather-resistant paint on the surface.

Embodiments of the present invention will be described below based on the drawings.

The thin metal plate core material itl is bent into a substantially U-shape, and on both side edges there are substantially U-shaped ear core materials (4
) is a contortion. A synthetic resin layer (2) such as vinyl chloride resin is formed on the entire inner and outer circumferential surfaces of the thin metal plate core material il+ by extrusion molding. In this case, the ears (6) formed in series with the synthetic resin layer (2) are formed in a hollow space, and the thickness of the synthetic resin layer (2) is approximately equal at any position. . A weather-resistant paint (3) is applied to the entire surface of the synthetic resin layer (2). As weather-resistant paint (3),
These include UV-curable paints that harden when exposed to ultraviolet light, and electron beam-curable paints that harden when exposed to electron beams.

When the weather-resistant coating (3) is made transparent, the coating 1 can transmit both ultraviolet rays and electron beams, and both ultraviolet curable and electron beam curable coatings can be used. When staining the weather-resistant paint (3), an electron beam curing type paint is used since ultraviolet rays do not pass through it. With this structure, the synthetic resin layer (2) of the nine rain gutter (A) tends to expand and contract greatly due to changes in temperature due to direct sunlight, etc., but the thin metal plate core material has a smaller coefficient of thermal expansion than the synthetic resin. Il+ suppresses the expansion and contraction of the weather-resistant paint (3), and prevents the weather-resistant paint (3) from peeling off from the synthetic resin layer (2).
3) prevents peeling.

In the embodiments, eaves gutters have been described, but other rain gutters may be used, and the shape of the rain gutters can be changed in design. Refreshingly, by providing a large number of holes in the thin metal plate core material fi+,
Synthetic resin layer f2) inside and outside of thin metal plate core material (1) (2+
are connected through the through holes, which may prevent peeling of the thin metal plate core material t1+ and the synthetic resin layer (2).

In view of the above, the present invention forms a synthetic resin layer on the outer peripheral surface of the thin metal plate core material, so that the thin metal plate core has a smaller coefficient of thermal expansion than synthetic resin even when the temperature changes due to direct sunlight. The material has the advantage of being able to suppress large changes in expansion and contraction of the synthetic resin layer and suppressing peeling and flaking of the weather-resistant paint on the surface.

[Brief explanation of the drawing]

The drawing is a partially cutaway perspective view of an embodiment of the present invention,
Kawa is a thin metal plate core material, (2) is a synthetic resin layer, and (3) is a weather-resistant paint. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) A rain gutter characterized in that a synthetic resin layer is formed on the entire inner and outer circumferential surfaces of a thin metal plate core material, and a weather-resistant paint is applied to the surface of the synthetic resin layer.