JPS6242020Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an eaves gutter made of a composite material formed by inserting a thin metal plate into a synthetic resin material.

[Background technology]

Traditionally, eaves gutters have been made by bending a composite material in which a thin metal plate is inserted into a synthetic resin material, but when the eaves gutters are installed outdoors and expand and contract repeatedly due to changes in outside temperature, the metal Because the thin plate and synthetic resin material have different coefficients of thermal expansion, the synthetic resin material peels off from the metal sheet, resulting in the problem that rainwater seeps into the interior through the peeled part and erodes the metal sheet. . Further, in order to solve this problem, the surface of the metal thin plate was roughened by sandblasting, etching, etc. to improve the adhesion, but this was not sufficient.

[Purpose of the invention] The present invention has been made in view of the above points, and is capable of improving the adhesion between a thin metal plate and a synthetic resin material, and also preventing the thin metal plate from rusting over a long period of time. The purpose is to provide eaves gutters that can

[Disclosure of invention]

That is, in the present invention, the direction of the arch is the thin metal plate 1.
A large number of arch-shaped embossed pieces 2 are embossed on one side of the thin metal plate 1 along the longitudinal direction, and both sides of the embossed pieces 2 are opened. The above purpose is achieved by an eaves gutter formed by bending a composite material 5 in which the thin metal plate 1 is inserted into a synthetic resin material 4, communicating with the hole 3 of the thin metal plate 1 formed when the metal plate is raised. It is.

The present invention will be explained in detail below with reference to Examples. Although the thin metal plate 1 is not limited in any way, the thickness
It is preferable to use one with a diameter of 0.4 mm or less. This thin metal sheet 1 is passed between a pair of rolls 6, 6 as shown in FIG. A hole 3 is formed through the front and back surfaces of the thin metal plate 1 when the metal plate 2 is punched. roll 6,
6 is a lifting roll 6a and a rubber lining roll 6
The punch roll 6a is provided with a plurality of blade plates 8 in the axial direction, each having a large number of protrusions 7 formed on its outer periphery. The distance t ₂ between each blade plate 8, 8 and the pitch p ₁ between the protrusions 7, 7 of blade plate 8 can be changed arbitrarily. By changing the width of the attached spacer 9, the blade plate 8,
By changing _the pitch p ₂ in the width direction of the raised piece 2 provided on the thin metal plate 1, and by changing the pitch p ₁ between the protruding pieces 7 and 7, the raised piece can be changed. The pitch _p3 in the two flow directions can be changed respectively. Furthermore, by changing the shape and thickness t ₁ of the protruding piece 7, the shape of the raised piece 2 and the shape of the hole 3 can be arbitrarily changed. For example, the shape of the hole 3 can be made semicircular, triangular, square, etc. It is also possible. In addition, as the roll 6 facing the uplifting roll 6a, in addition to the rubber lining roll 6b, an uneven roll having a number of recesses on the outer peripheral surface corresponding to the protrusions 7 of the blade plate 8 may be used. The raised height h of the raised piece 2 formed in this way
varies depending on the thickness of the thin metal plate 1, but for example, if the plate thickness is 0.12 mm, it is best to set it to about 0.3 mm. It is best to set the length l to 0.2 to 0.3 mm and the width W to about 0.2 mm. Also, pitch p ₂ is about 2.0mm, pitch
It is best to set p ₃ to approximately 2.0 mm. Also, the raised piece 2
When they are provided on the thin metal plate 1 using the roll 6, they are provided at a fixed pitch, but they may be provided at random. Using the thin metal plate 1 on which a large number of embossed pieces 2 have been embossed in this way as a core material, the third
As shown in the figure, a composite material 5 is formed by inserting it into a synthetic resin material 4. Synthetic resin material 4 is metal thin plate 1
The front and back layers 11 and 12 are formed by coating the front and back surfaces of the metal plate 1, and the synthetic resin material 4 passes through the hole 3 in the thin metal plate 1 to connect and integrate the front and back layers 11 and 12. . Then, this composite material 5 is bent to produce an eaves gutter as shown in FIG.

By forming the composite material 5 using the thin metal plate 1 provided with a large number of raised pieces 2 as a core material, the front and back layers 11 and 1 can be passed through the holes 3 of the thin metal plate 1.
The synthetic resin materials 4 of 2 are integrated to form the front and back layers 11 and 1.
2 can be prevented from peeling off from the thin metal plate 1, and at the same time, a large number of raised pieces 2 can be attached to the synthetic resin material 4.
Since it bites inward, the adhesion strength between the front and back layers 11, 12 and the thin metal plate 1 can be improved. This has openings 1 on both sides of the raised piece 2.
5 is formed, especially both sides of the raised piece 2 have a rough surface 1.
3, it is possible to further improve the adhesion with the synthetic resin material 4 due to the anchor effect. Further, the raised pieces 2 are the front and back layers 11,
12, the expansion and contraction of the front and back layers 11 and 12 is physically restricted, and the thermal expansion coefficients of the thin metal plate 1 and the front and back layers 11 and 12 are different. It is also possible to reduce the mutual deviation. When curved this composite material 5 to produce an eaves gutter, it is preferable to curve the composite material 5 with the surface on which the raised pieces 2 are raised facing the back side. In other words, when inserting the thin metal plate 1 into the synthetic resin material 4, the surface on which the raised piece 2 protrudes may be formed with some unevenness, so it should be inserted on the inner surface of the eaves gutter. Therefore, it is better to make the uneven surface invisible from the outside so as not to spoil the appearance. Furthermore, as described above, the raised pieces 2 dig into the back layer 12 and can restrict the expansion of the back layer 12, thereby preventing the eaves gutter from widening.

[Effect of idea]

As mentioned above, the present invention involves punching out a large number of arch-shaped raised pieces on one side of a thin metal plate, opening both sides of the raised pieces, and when the openings and the raised pieces are raised. The synthetic resin material on the front and back sides of the metal sheet can be joined through the hole formed during the punching of the punched piece, and the synthetic resin material can be connected to the metal sheet. It can prevent it from peeling off from the thin plate, increasing the rust prevention effect, and since many embossed pieces dig into the synthetic resin, it restricts the expansion and contraction of the synthetic resin material due to heat, etc. This makes it possible to reduce mutual misalignment between the thin metal plate and the synthetic resin, thereby further preventing peeling. In addition, since the arch-shaped embossed piece is embossed on the thin metal sheet so that the direction of the arch is along the longitudinal direction of the thin metal sheet, the arch-shaped embossed piece along the longitudinal direction of the thin metal sheet The bending strength in the longitudinal direction can be reinforced, increasing the strength in the longitudinal direction of the eaves gutter, and the arch-shaped raised pieces greatly impede the workability of bending the thin metal plate in the width direction. There is no risk of deterioration in workability when forming eaves gutters.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the manufacturing method of an embodiment of the present invention, Fig. 2 is a perspective view of the main parts of the above, Fig. 3 is a partially cutaway sectional view of the same, and Fig. 4 is a perspective view of the eaves gutter as above. It is a diagram. 1 is a thin metal plate, 2 is a raised piece, 3 is a hole, 4 is a synthetic resin material, 5 is a composite material, and 15 is an opening.

Claims (1)

[Scope of utility model registration request] A large number of arch-shaped embossed pieces are embossed on one side of a thin metal sheet so that the arch direction is along the longitudinal direction of the metal sheet, and both sides of the embossed pieces are opened. An eaves gutter is formed by bending a composite material in which the thin metal plate is inserted into a synthetic resin material and communicates with the hole in the thin metal plate that is created when it is erected.