JPH0431380Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a metal rain gutter.

(Prior Art and Problems) Conventionally, metal rain gutters such as gutter anchors or downpipes have been manufactured by combining formed metal plates into a cylindrical or rectangular tube shape.

In order to combine and connect metal plates, the ends to be connected must be soldered together, or an engaging piece may be provided at each end to engage and connect them using a method commonly known as ``seam folding''.

However, the connection method by soldering tends to be insufficient in terms of strength, and there is a risk that the solder portion may peel off and the rain gutter may be damaged after long-term use.

In addition, although the connection strength is sufficient in the method of engaging and connecting the ends provided with engaging pieces, it is difficult to maintain complete watertightness even if the engaged parts are pressure-bonded, and therefore, it is difficult to maintain a complete watertightness, so further soldering is necessary. I was doing things like attaching it, but
These operations were time-consuming in the manufacturing process.

(Purpose of the invention) The present invention was devised in response to the above-mentioned problems, and consists of forming a layer of thermoplastic resin such as polyethylene that melts at a relatively low temperature on the surface of a metal plate.
After the end portions are engaged and connected, the engaging portion is heated to melt and fix the resin layer, thereby ensuring a secure connection.

(Structure of the invention) Figure 1 shows a gutter anchor 1 which is an embodiment of the invention.
FIG. 2 and FIG. 3 also show enlarged perspective views of the engaging portion thereof.

The gutter anchor 1, which has a substantially rectangular cylindrical shape, is composed of a bottom plate 12, side plates 13, 13, and a back plate 14, and is bent at the center and opened at the top. Cuts 11, 11 for placing
is provided.

In addition, each of the bottom plate 12, side plate 13, and back plate 14 is formed by forming a resin layer 3 of about 0.1 mm to 0.2 mm on the surface of a metal plate 2 such as a copper plate, and this resin layer 3 is made of a relatively thick material such as polyethylene. A thermoplastic resin that melts at low temperatures is bonded.

In this embodiment, a resin layer 3 is formed on one surface of the metal plate 2.
Although this resin layer 3 is formed on the inner surface of the gutter anchor 1, it is also possible to form a similar resin layer 3 on the outer surface.

This substantially rectangular cylindrical gutter anchor 1 is engaged and connected at the side ends of each face plate, and will be described in detail with reference to FIGS. 2 and 3.

The lower end of the side plate 13 is folded inward to form a raised bent piece 16, and both ends of the bottom plate 12 are provided with raised parts 18 whose edges are bent upwards. The holding piece 17 is formed by bending the holding piece 17 outward.

Then, the folded piece 16 is held and engaged between the holding piece 17 and the raised part 18, and the engagement is completed by pressing the engagement part. The gutter anchor 1 is completed by heating it to a temperature that melts it (for example, 150°C) and solidifying it. This engaging portion 15
For heating, a gas torch or a hot atmosphere furnace may be used.

At this time, if the resin layer 3 of the metal plate 2 is assembled so as to be located on the inner surface side of the gutter, the metal plate 2 can be prevented from being corroded by rainwater.

FIG. 4 shows another embodiment of the present invention, which is a perspective view when applied to a cylindrical downpipe 4, in which a metal plate 2 with a resin layer 3 provided on the inner surface is bent. An engaging portion 41 is formed by engaging the end edges.

If this engaging portion 41 is heated to melt and fix the resin layer 3, the same effect as in the previous embodiment can be obtained.

(Effect of the invention) As described above, the metal rain gutter according to the present application forms a thermoplastic resin layer such as polyethylene on the surface of the metal plate that constitutes the rain gutter, and the resin layer is placed on the inner surface of the gutter so that the end Since the parts are engaged and connected, and the engaged parts are finally heated and welded, compared to the conventional method, there is no need for soldering and the production cost is low.It is completely watertight, and the resin layer is Since it is located on the inner side, it prevents the metal plate from being corroded by rainwater, and has various advantages such as being able to withstand long-term use.

[Brief explanation of drawings]

The drawings relate to an embodiment of the present invention; FIG. 1 is a perspective view of a gutter anchor, FIGS. 2 and 3 are perspective views of main parts of the gutter anchor, and FIG. 4 is another embodiment of the present invention. It is a perspective view of a certain downpipe. 1...Gutter anchor, 11...Notch, 12...
Bottom plate, 13...Side plate, 14...Rear plate, 15
...Engagement portion, 16...Bending piece, 17...Wrapped piece,
18... Standing part, 2... Metal plate, 3... Resin layer,
4... Downpipe, 41... Engagement part.

Claims (1)

[Scope of utility model registration request] In a rain gutter formed by engaging and connecting the ends of formed metal plates, a resin layer of thermoplastic resin such as polyethylene is formed on at least one surface of the metal plate to connect the ends. A metal rain gutter which is formed by connecting the resin layers and melting and fixing the resin layer by heating the engaging portions.