JPH053608Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvement of synthetic resin board materials used for construction.

[Prior art]

Conventionally, plate materials used for roofs of carports, sunrooms, etc. are flat plates molded to a predetermined size from synthetic resin such as acrylic or polycarbonate. Such board materials are bent and installed at the construction site so that they match the framework of a carport, sunroom, etc.

[Problem that the invention attempts to solve]

However, since all of these plate materials are formed to have a uniform thickness, there is a problem that when bending is performed, if the radius of curvature of the bent portion becomes small, bending by cold working becomes impossible. For example, commonly used plate materials have a thickness of 4 to 6 mm, but the minimum radius of curvature that can be cold bent on site is limited to 200 to 300 times the plate thickness. ing. For this reason, in the case of a plate material having a constant thickness as described above, bending with a small radius of curvature, especially at the end portion, causes large distortions, making it unusable.
Therefore, it may be possible to use thin plate materials that can be bent, but this would cause a new problem: the parts that are not bent would lose their rigidity, making them unusable as roofing materials, etc.

[Means to solve the problem]

Therefore, in order to solve the above problems, in the synthetic resin construction board material of the present invention, the thickness of the part where the bending process is performed on the outside from the bending start point is thinner than the thickness of the other central part. The main point is that

[Function of the invention]

With such a configuration, the thickness of the bending area on the outside from the bending start point where cold bending of the synthetic resin plate material is applied at the work site is thinner than the thickness of the center area, so that the bending start point In cold bending of the bending part of the entire outer side, even if the radius of curvature becomes small, the bending process can be easily performed to form a curved surface without worrying about problems such as distortion.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the construction board material of the present invention. The plate material 1 shown in the figure is made of transparent synthetic resin such as acrylic or polycarbonate, and has parts 4 to be bent,
The plate thickness of the plate 4 is approximately 1/2 thinner on the outside of the bending start points 3, 3 than the plate thickness of the central portion 2. FIG. 2 shows a cross-sectional view of FIG. Form the plate so that the plate thickness at points 3 and 3 matches the plate thickness t1 at bending parts 4 and 4, and then smoothly bend it to the plate thickness t0 at the central part with an appropriate distance l toward the center part 2. The plate thickness is shifting. It is preferable that the distance 1 is longer because stress concentration due to bending can be reduced at the bending start points 3, 3 when the bending parts 4, 4 are subjected to the bending process. Such a bending part 4 of the plate material 1,
When 4 is bent from the bending starting points 3, 3, curved surfaces 4', 4' as shown by broken lines are formed. In this case, the plate thickness t1 of the parts 4, 4 to be bent is thinner than the plate thickness t0 of the central part 2, so the radius of curvature R is small due to cold working, which is impossible when the plate thickness is t0. Bending processing becomes possible. However, since the central part 2 has a thick plate thickness t0, it will not bend downward even if it is used in a flat state.
Further, water or the like does not accumulate in the portion 2.

Next, another example is shown in the cross-sectional view of FIG.
This plate material 10 has portions 14 and 1 to be bent.
4 is formed to become thinner outward in stages from the bending start points 13, 13'. The part 14 to be bent has a thickness t2 thinner than the thickness t0 of the central part 12, and the intermediate bending part 14b has an even thinner plate thickness.
The outer bent portion 14a having t1 is formed thinner in stages. When bending such a plate material 10, the bending start point 1 of the intermediate bending portion 14b is
3, 13 and the bending start point 1 of the outer bending part 14a
Bending can be performed using two points 3' and 13' as boundaries, and the curved surface to be bent can be gradually bent at the bending part 14, and a sudden change in curvature can be made at the bending start points 13 and 13'. It never becomes a curved surface.

Now, to further explain another embodiment, which is shown in a perspective view in FIG. 4, as shown in the figure, a plate material 30 includes a plate material 31 having bent portions 31a at both ends, and a spot, for example, at a central portion 31b of the plate material 31. welding 32
It is composed of plate materials 32 pasted together by a...etc. In such a plate material 30, it is only necessary to select the plate material 31 having the minimum thickness that allows a curved surface to be formed by cold working at the bending portion 31a, and the plate material 32 attached to the center portion 31b of the plate material 31 is selected. The thickness can be freely selected in consideration of span spacing and the like. Therefore, it becomes easier to cold-work a curved surface having a desired radius of curvature, and it also leads to a reduction in the processing cost of the plate material 30 formed by laminating the plate materials 31 and 32 together.
It is also possible to select various colors and translucency of the plate material 32 to be pasted, and the variety of the plate materials 30 can be greatly increased, increasing versatility.
Here, the plate materials 31 and 32 constituting the above-mentioned plate material 30 are joined by spot welding, but considering the appearance etc., it is preferable that the spot welds 32, etc. are performed along the frame to which they are attached. The attachment method is not limited to spot welding. It goes without saying that the plate material having such a structure can also be applied to the embodiment shown in FIG. 3, so a description thereof will be omitted.

Here, the above-mentioned plate material had sections at both ends that were bent to a thickness thinner than that of the central section, but depending on the construction situation, only one section could be bent. There is no problem even if it is. Further, it is also possible to form the required minimum plate thickness at the central portion and the bent portion, taking into account the radius of curvature and strength of the curved surface set in advance.

Next, a garage using the construction board material of the present invention will be described with reference to FIG. 5. In the diagram, garage 1
In 00, both parts 4, 4 of the construction board 1 of the present invention are cold bent from starting points 3, 3 so as to match the shape of the roof frame 104 provided above the pillars 101, 102. It is bent to form a curved surface. To install the plate 1, first place the plate 1 at a predetermined position on the roof frame 104, align the fixing member 103 at the joint where the plates 1 are adjacent to each other, and fix it to the frame 104 with screws or the like. By doing so, the roof of the garage 100 is constructed by cold bending both parts 4, 4 and aligning them with the frame 104. In this case, since the parts 4, 4 to be bent are thin, they can be easily bent. It is preferable to use the plate material 1 with the flat side facing outward for the sake of appearance, water flow, etc.

[Effect of idea]

As is clear from the above explanation, with the construction board material of the present invention, even if the radius of curvature of the bending part outside the bending start point where cold bending is performed is small, the entire bending part can be bent. Moreover, since a curved surface without distortion can be obtained, cold bending can be easily carried out at the work site.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the construction board material of the present invention, Fig. 2 is a cross-sectional view taken from Fig. 1, Fig. 3 is a sectional view of main parts of another embodiment of the present invention, and Fig. 4 5 shows a perspective view of another embodiment of the present invention, and FIG. 5 shows a perspective view of an example of use of the construction board material of the present invention. Explanation of symbols, 1, 10, 20... Architectural board material,
2, 12, 22... Central part, 4, 14, 24...
...bending part.

Claims (1)

[Scope of utility model registration request] A construction board made of synthetic resin, characterized in that the board thickness at the bending part outward from the bending start point is thinner than the board thickness at the other central part.