JPS5911129Y2 - sheet roof tiles - Google Patents

Description

[Detailed explanation of the idea] This invention relates to the improvement of plate-shaped roof tiles.

Platy roof tiles made of asbestos-cement boards or the like have a problem in that rainwater infiltrates through the overlapped portions of the roof tiles due to capillary action.

For this purpose, as shown in Fig. 1, several rows of triangular wave-shaped drainage grooves 2 are provided vertically on the surface of the roof tile portion S covered by the upper roof tile, and the upper row triangular waveform troughs 21 and the lower row triangular waveform troughs 21 are provided. 2
1 through a straight groove 24, and a drainage groove 3 extending toward the eaves side is connected to the valley 21 of the triangular wave-shaped groove 2a in the lowest row.

By the way, in plate-shaped roof tiles, a bending moment acts on the roof tile fixing nails as support due to the suction force applied to the surface of the roof tile during strong winds.

However, in the above triangular wave grooves 2, 2..., the valley 2, which is an acute angle groove part, with respect to the above bending moment.
1 is the mechanically weakest point.

The above plate-shaped roof tile has triangular wave grooves 2, 2...the curves are in the same phase vertically, and the weakest points 21, 21...
・are also in the same phase vertically and cannot be said to be dispersed, so overall it is considered that the strength against the above bending moment is inferior.

Moreover, in the valley 21 mentioned above, which is the weakest point, 4
Since the cut grooves of the book intersect and the number of intersecting cut grooves is large, it can be said that the strength against the bending moment is low from this point as well.

The plate-shaped roof tile according to the present invention was devised to solve the above-mentioned difficulties, and the surface of the plate-shaped roofing material covered with the upper roofing material has sawtooth in the width direction of the plate-shaped roofing material. Several rows of continuous drain grooves are provided, with the upper and lower rows being shifted in phase, and the valleys of the upper row of sawtooth grooves are opposite to the oblique sides of the lower row of sawtooth grooves. One of the serrated grooves in the lower row is connected by an oblique groove extending from the valley, and one of the serrated grooves in the lower row is connected to the valley part of the lowermost row of serrated grooves. This structure is characterized by a drain groove extending from the lower end of the diagonal groove to the surface of the roofing material.

The present invention will be explained below with reference to the drawings.

In FIG. 2, A is a plate-shaped roofing material made of asbestos-cement board or the like, and S indicates a portion to be overlapped with the upper roof tile.

2, 2... are serrated drainage grooves that are continuously provided in the middle direction of the sheet roofing material A over several rows of upper and lower rows, and between the upper and lower rows, there are serrated drainage grooves. The phase is shifted.

The valley 21 of the upper row of serrated drainage grooves has one side of the upper row of serrated drainage grooves connected to the oblique side 22 of the lower row of serrated drainage grooves.
They are communicated by diagonal grooves 23 that are extended further, and from the valleys 21 of the serrated grooves 2a in the lowermost row, one side of the serrated grooves 2a in the lower row is extended. A drainage groove 3 is connected from the lower end of 23 to the surface of the roofing material.

The plate-shaped roof tile according to the present invention has the structure as described above, and the phases of the sawtooth-shaped drain grooves in several rows above and below are shifted,
As a result, the valleys of each drain groove, that is, the drain groove portions that are the weakest points against the bending moment acting on the plate-shaped roof tile, are also phase-shifted. The weak points are well distributed, and the strength of the sheet roof tile against the above bending moment can be sufficiently guaranteed.

Moreover, only three kerf grooves intersect in the valley of the serrated groove, which is the weak point mentioned above, and the number of intersecting kerf grooves is smaller than that of the conventional example shown in Fig. 1. ,
The reduction in strength of the trough itself against the bending moment can be reduced, and from this point of view as well, it is advantageous for the above-mentioned strength guarantee.

In addition, because the ditches are interconnected in a complicated manner, even if rainwater is blown by strong winds, it will not flow backwards through the ditches; Since rainwater flows down to the ground, rainwater intrusion can be effectively prevented.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional plate-shaped roof tile, and FIG. 2 is an explanatory diagram showing a plate-shaped roof tile according to the present invention. In the figure, A is a plate-shaped roofing material, 2, 2... are serrated grooves, 21. 21... is the valley of the serration groove, and 22, 22... is the hypotenuse.

Claims (1)

[Scope of utility model registration request] On the surface of the sheet roofing material covered by the upper roofing material, there are several rows of drainage grooves that are continuous in a sawtooth shape in the width direction of the sheet roofing material,
Moreover, the phases of the upper and lower rows are shifted, and the valley of the upper row of sawtooth ditches connects one of the upper row of sawtooth ditches to the oblique side of the lower row of sawtooth ditches. They are communicated by diagonal grooves that extend further and are hollow, and one side of the bottom row of sawtooth grooves extends from the valleys of the bottom row of sawtooth grooves, and the roof A plate-shaped roof tile that is characterized by a drainage groove that runs over the surface of the material.