JPH0634998Y2 - Roofing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a roofing material used for metal roofing.

(Prior art) A roofing material is generally used in which a thin metal plate is attached to the surface of a base sheet obtained by impregnating non-woven fabric with asphalt in a width of about half the width of the base sheet, and the roof is raised to expose the thin metal plate portion. This kind of roofing material is usually used for roofing called "single-letter thatching".

Conventionally, as an example of this kind of roofing material, a roofing material in which a base sheet and a metal thin plate are integrally folded in two and folded back in two to form an appropriate width from the side edge of the metal thin plate pasting, is a roofing material. Proposed.

The processing of the folding edge portion of this roof material is mechanically performed at the time of factory production, and the roof material main portion and the folding edge portion are formed into a complete close contact superposition structure by the molding which strongly compresses at the time of folding processing.

Then, in order to sequentially raise the roof material on the roof base material, an adhesive is used for the lower surface of the folding edge portion and the roof material is attached to the base material or the main portion of the lower roof material.

As mentioned above, in roofing where the roofing materials are pasted together using an adhesive, no special nails are required, and the presence of the adhesive layer seals the gaps between the roofing materials and prevents rainwater from entering. In addition to preventing, peeling prevention is achieved.

(Problems to be solved by the invention) By the way, the roofing in which the roofing materials are attached to each other by using the adhesive as described above has the following problems.

(1) If there is coating unevenness in the adhesive that adheres the roofing materials to each other, the roofing materials will be locally peeled off under strong winds, resulting in a decrease in waterproofness.

(2) Since no pegs or the like are used, the bonding strength to the roof substrate is weak, and local flapping or peeling of the roof material occurs under strong wind.

(3) Since the bonding strength between the roofing materials depends on the adhesive strength of the adhesive, it has sufficient bonding strength in the early stage of roofing, and even if it is completely waterproof, the adhesive will change with time. Along with the deterioration, the bonding strength is lowered and the roofing materials are locally peeled from each other, so that the waterproofness is also lowered.

(4) After the roof is raised, the metal plate constantly repeats expansion and contraction due to the temperature difference, but the expansion and contraction of this metal plate exceeds that of the adhesive, and the adhesive does not correspond to this and peeling occurs. There is also a drop in waterproofness.

The present invention has been made in view of the above-mentioned points, and it has a high bonding strength with nailing to the roof base, and the nails used are completely hidden under the waterproofness on the back side of the roofing material. The purpose is to provide a roofing material.

(Means for Solving the Problems) The gist of the present invention for achieving the above-mentioned object is that the surface of a base sheet impregnated with asphalt is
In a roofing material to which a thin metal plate is adhered with a width of about half the width of the base sheet, a crease groove is formed in which the base sheet is removed in parallel with the side edge of the metal thin plate adhering, and a medium-recessed asphalt is formed in the crease groove. It is a roofing material characterized by having layers.

(Operation) In the above configuration, the roof material is turned upside down, and the folded edge portion is nailed to the roof base. When the roof material main body is inverted from the crease groove and overlapped on the folded edge while leaving the nailed fold edge as it is, the nail is hidden on the lower surface of the roof material main section.

In this way, since the roof material main part and the folded edge part are folded, there is an asphalt layer having a hollow in the crease groove,
It bends from the center of the crease groove, and the asphalt layer is elastically enclosed inside the crease groove, and there is no gap between the main part of the roof material and the fold edge so that it completely overlaps and exhibits perfect waterproofness. To do.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a roofing material of the present invention, and FIG. 2 is an enlarged sectional view of a crease groove portion.

In the figure, reference numeral 1 is a roofing material, and the roofing material 1 is formed by attaching a thin metal plate 3 to the surface of a base sheet 2 obtained by impregnating a non-woven fabric or the like with asphalts and having a width half that of the base sheet 2. Then, this basic structure is common to well-known roofing materials.

In this invention, a crease groove 4 is formed by removing the base sheet so as to be close to and parallel to the side edge of the metal thin plate, and the roof material main portion 5 and the folding edge portion 6 are defined by the crease groove 4. An asphalt layer 7 is provided in the groove 4.

The base sheet 1 has a thickness of about 2 mm, and the crease groove 4 has a width of about 6 to 8 mm.

Further, the asphalt layer 7 has an amount of filling approximately half of the inside of the crease groove line 4, and as shown in FIG. .

In the roofing using the roofing material of the present invention configured as described above, as shown in FIG. 3, the upper roofing material 1 to be mounted is mounted on the lower roofing material 1 previously mounted on the roof substrate A. In the state of turning over, that is, with the back surface of the base sheet 2 facing upward, the folding edge portion 6 is overlapped on the thin metal plate of the lower roof material 1, and the folding edge portion 6 is fixed to the lower roof material 1 by the nail B to be integrated. , Main part 5 of roofing material along crease groove 4
Is reversed, and it is piled up on the folding edge 6 and raised.

At this time, the nail B is hidden on the lower surface of the roof material main portion, and the fold groove 4 is formed by the folding of the roof material main portion 5 and the folding edge portion 6.
The existing asphalt layer 7 is elastically confined inside the crease groove 4, and there is no gap between the roofing material main portion 5 and the folding edge portion 6 so that the asphalt layer 7 is polymerized in a completely adhered state.

(Effect) As described above, the roofing material of the present invention has the following effects.

(1) Since the folded edge portion of the roof material is nailed together with the lower roof material to the roof substrate, and then the main portion of the roof material is folded over the folded edge portion, the bonding strength between the roof material and the roof substrate is increased. The roofing materials have a high overlapping relationship with each other and the waterproofing property is not deteriorated for a long period of time. Further, the nailing position is close to the front edge of the roofing material, and the peeling strength against wind pressure is high.

(2) Since the base sheet is removed (removed) to provide a crease groove that defines the roof material main portion and the fold edge, and the crease groove is provided with a middle depression-shaped asphalt layer, the fold edge is nailed. After stopping, the reverse folding of the main part of the roofing material can be done easily and accurately from the middle of the crease groove, the workability is excellent and the workability is excellent, and the crease line of each roofing material after that The roof is lined up in a straight line.

(3) Since a crease groove formed by removing (cutting) the base sheet was provided with an asphalt layer having a medium depression, the main part of the roofing material was folded along the crease groove and polymerized by folding it over the edge. At this time, the asphalt layer in the crease groove is elastically confined in a compressed state so that the roof material main part and the fold edge are completely adhered to each other without any gap, and the crease groove line is completely waterproof. The asphalt layer, which is contained in a compressed state inside, is softened by the sun's heat after roofing, penetrates into the joint between the main part of the roofing material and the folded edge, reaches the nail stop head, and waterproofs around the nail stop. To become more sexual.

(4) Since the roofing material is nailed, the expansion and contraction of the metal plate of the roofing material does not exceed that of the adhesive agent and peels off due to the temperature difference unlike when using the adhesive agent. Excellent long-term waterproofness.

(5) The roofing material has a simple structure and excellent workability, can be mass-produced, and can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a roofing material of the present invention, FIG. 2 is an enlarged sectional view of a crease groove portion, FIG. 3 is an explanatory view of a roofing procedure,
FIG. 4 is an enlarged sectional view of the crease groove portion at the time of bending. 1 ... Roofing material, 2 ... Base sheet, 3 ... Metal sheet,
4 ... Crease groove, 5 ... Roofing material main part, 6 ... Folding edge, 7 ... Asphalt layer.

Claims (1)

[Scope of utility model registration request] 1. A roof material in which a thin metal plate is adhered to a surface of a base sheet impregnated with asphalt with a width of about half the width of the base sheet, and a crease groove in which the base sheet is removed in parallel with a side edge of the thin metal plate. A roofing material, characterized in that a strip is provided, and an asphalt layer having an intermediate depression is provided in the crease groove strip.