JP2742009B2 - Metal roofing structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roofing structure for a metal roofing material, and more particularly, to avoiding leakage of rainwater from a connection point by a rational structure to improve watertightness and to penetrate the connection point. The present invention relates to a technique for avoiding deterioration of a synthetic resin layer due to rainwater or the like.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Publication No. 53-3905 shown in FIG.
In the roofing structure of a metal roofing material that is laid with a slope as in Japanese Patent Publication No. 5 (1993) -1995, a connection portion 10 to be overlapped is provided on the upper end portion of the metal roofing material Aa that is laid under the water. The overlapping connection portion 4 of the metal roofing material Ab on the water side is formed and
Are overlapped.

[0003]

However, in such a configuration, the watertight sealing material 1 is provided at the connection portion where the overlapped connection portion 4 is overlapped with the overlapped connection portion 10.
1 is interposed, for example, when the function is impaired due to the deterioration of the watertight sealing material 11 with the passage of time, for example, between the overlapped connection portion 4 and the overlapped connection portion 10. The gap is a substantially constant gap, rainwater easily penetrates into such a narrow gap with a substantially constant gap, and the metal roofing material 1 on the lower side and the upper side by the capillary phenomenon. In the case of a butt joint, especially in the case of a gentle slope, the infiltration of rainwater is further facilitated, the leakage is promoted, and the metal roofing material is lined with a synthetic resin layer to improve the heat insulation. In roofing materials, the leaking rainwater reaches the underwater end surface of the synthetic resin layer of the metal roofing material above the water, and the synthetic resin layer absorbs water, deteriorating the synthetic resin layer, and its heat insulating property is quickly reduced. There was a problem of being damaged.

[0004] The present invention has been made in view of such a problem, and an object of the present invention is to avoid the leakage of rainwater from a connection point with a reasonable configuration by a reasonable configuration at the connection point. Roofing of metal roofing materials that can improve the watertightness and prevent the synthetic resin layer from deteriorating due to rainwater or the like that has infiltrated the connection points, and can obtain a good connection state over a long period of time. It is to provide a structure.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided a method for folding a rectangular wave.
A roofing structure of a metal roofing material in which a synthetic resin layer 2 is lined on the back surface of a metal roofing sheet 1 which is bent and sloped, and a roof base 3 above the water and a roof below the water
In the ground 3, the water side is higher based on the above gradient.
Is formed on the roof base 3 above the water.
Metal roofing material A and metal placed on the roof base 3 above the water
A stepped portion H caused by the step D is formed between the roofing material A and the roofing material A.
The metal roof plate 1 is extended from the synthetic resin layer 2 at the underwater end of the metal roofing material A laid on the water side to form an overlapping connection portion 4 and is laid on the water side. Of the metal roofing material A on the water-side end,
Connection section formed at the underwater end of the metal roofing material A
4 are overlapped, and the overlapped connection portion 4 is
A substantially wedge-shaped space 12 is formed between the overlapped connection portion 10 and the overlapped connection portion 4 so as to be higher toward the water surface.

[0006]

[0007]

In the underwater side of the space 12, the connection portion 1
The gap between the overlapped portion 0 and the overlapping connection portion 4 is narrow, and a watertight treatment can be easily performed by, for example, interposing a watertight sealant 11. Then, the rainwater that has penetrated through the entrance of the void 12 stays at the lower entrance due to its surface tension, and the rainwater at the entrance will penetrate deep into the connection part due to the capillary phenomenon. However, the height of the empty space 12 is higher as it goes deeper, so that rainwater is prevented from penetrating deeper due to capillary action or the like. Then, for example, when a strong wind such as a typhoon blows into the space 12, the space 12 is deeper and deeper and the space is wider, and the pressure of the strong wind blown from the entrance is reduced, and the strong wind is Spills to the back of the wind and suppresses the blowing of strong winds. In this way, the rainwater itself is suppressed from penetrating into the back, and is prevented from being carried to the back by strong winds. Even if the watertight sealing material 11 deteriorates due to aging, it will be kept for a long time. Maintain water tightness.
Then, it is possible to prevent rainwater from penetrating into the back and reaching the synthetic resin layer 2 of the metal roofing material A on the water side, and to prevent the synthetic resin layer 2 from absorbing water and obstructing the heat insulating property. As a result of these,
The length of the overlapping connection portion 4 does not need to be increased, and can be shortened.

In order to make the space 12 substantially wedge-shaped,
In the underwater roof base 3 and the underwater roof base 3,
This step is performed by forming a step H in which the water surface is higher on the basis of the above-mentioned gradient, and bending the overlapping connection portion 4 formed by extending only the metal roofing material 1 on the water surface downward at the base end thereof. Metal roofing material 1 is made of synthetic resin layer 2
The wedge-shaped space 12 is easily formed by effectively utilizing the structure of the metal roofing material A extending from the metal roof material and forming the overlapping connection portion 4. Then, the overlapping connection portion 4 on the upper surface side is bent at the connection point, and the gradient of the overlapping connection portion 4 is increased (a steep slope) to increase the flow rate of rainwater flowing down the overlapping connection portion 4, Around the back side of the overlap connection portion 4 is avoided. Moreover, since the overlapping connection portion 4 on the upper surface is bent, the gradient at the lower connected portion 10 may be unchanged, and the overlapping connection portion 10 may be bent as in the case of the configuration in which the overlapping connection portion 10 is bent. It is not necessary to make the gradient gentler than that, and it is possible to prevent the rainwater from climbing over the connected portions 10 to avoid leakage of the rainwater.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the metal roofing material A is configured by interposing a urethane foam resin 2 a as a synthetic resin layer 2 in a sandwich manner between a metal roofing sheet 1 bent in a square wave shape and a back metal sheet 7. ing. Then, on the underwater (lower end) side of the metal roofing material A, the back metal roofing plate 7 and the urethane foam resin 2a are cut off, and the metal roofing plate 1 is extended from the end surface of the urethane foam resin 2a to form the overlap connection portion 4. Have been. The length of the overlapping connection portion 4 is 200 to 400 mm.
It is about. On the water (upper end) side of the metal roofing material A, the end faces of the metal roofing sheet 1, the urethane foam resin 2a, and the back metal roofing sheet 7 are aligned.

[0010] Roof bases 3 · · · constructed as a main building using channel materials are arranged substantially parallel to each other at intervals in the eaves ridge direction, and such roof bases 3 · · · It is made so that a simple roof slope is constructed. And to connect the metal roofing materials A, A,
The lower metal roofing material A is placed on the roof foundation 3, and the lap connection portion 4 of the upper metal roofing material A is lap-connected to the surface of the upper end of the lower metal roofing material A. In such a case, FIG.
As shown in the figure, a back plate 5 of, for example, a metal plate is
The sealing material 6 is interposed between the end surfaces of the synthetic resin layers 2 and 2 on the front side of the back plate 5 and screwed.

In the back plate 5, an upright portion 13 is formed in a portion placed on the roof base 3 above the water, and in the upright portion 13, a plurality of roof bases 3 are formed. A step H in which the water side becomes higher with respect to the gradient is formed. Thus, a stepped portion D caused by the step H is provided between the metal roofing material 1 placed on the roof basement 3 above the water and the metal roofing material 1 placed on the roof basement 3 below the water.
Is formed, and the overlapping connection portion 4 of the metal roofing material A on the water side is overlapped on the overlapped connection portion 10 of the metal roofing material A on the waterside, and at this connection point, the self-drilling screw B is attached to all the mountains. The back plate 5 having a thickness of about 1.6 mm is screwed at the bottom portion and fixed to the roof base 3 below the water, and a self-drilling screw B is screwed at both ends in the width direction at an intermediate portion of the connection point. A strong connection is made via. As the self-drilling screw B, a tex with a thread under the neck is used, and a washer 8 having a packing is mounted on the thread under the neck. Then, the joints on the back surfaces of the two metal roofing materials A, A to be connected are covered with the back plate 5, and moisture enters the connection points from the back surface side, and the overlapping connection portions 4 where the synthetic resin layer 2 does not exist on the back surface are formed. The dew condensation is prevented from occurring on the back surface or the like. In such an embodiment shown in FIG. 1, the abutting portions of the metal roofing materials A and A on the water-side and the water-side may be slightly displaced from the roof foundation 3.
The dimensional error of the metal roofing material A in the eaves ridge direction can be absorbed.

In such a connection state of the metal roofing materials A, A, the overlapping connection portion 4 of the metal roofing material 1 on the water side is bent downward around its base end, and the overlapping connection portion 10 is bent.
A substantially wedge-shaped space 12 whose height is higher toward the upper side of the water is formed between the upper portion and the overlapping connection portion 4. In the wedge-shaped space 12, an EPT sealing tape is interposed as a watertight sealing material 11 on the entrance side and the back side. Such a watertight sealing material 11 is necessary in the case of a gentle slope, but need not be provided in a steep roof. In addition, the thickness of the watertight sealing material 11 is thinner at the entrance side of the wedge-shaped cavity 12 and thicker at the rear side, and is closed at the entrance and the inner part of the wedge-shaped cavity 12. Needless to say,

As described above, the substantially wedge-shaped space 12 having a height higher toward the water side is formed between the overlapped connection portion 10 and the overlap connection portion 4. In the above, the gap between the overlapped connection portion 10 and the overlap connection portion 4 is narrow, and watertight processing can be easily performed by, for example, interposing a watertight sealant 11. Then, the rainwater that has penetrated through the entrance of the void 12 stays at the lower entrance due to its surface tension, and the rainwater at the entrance will penetrate deep into the connection part due to the capillary phenomenon. However, the height of the empty space 12 becomes higher as it goes deeper, and it is possible to prevent rainwater from penetrating deeper due to capillary action or the like. By the way, when a strong wind such as a typhoon blows into the space 12, the space 12 is deeper and deeper and the space is wider, and the pressure of the strong wind blown from the entrance is reduced. Thus, it is possible to prevent the strong wind from spreading to the inner part of the connection point, and to suppress the blowing of the strong wind. In this way, the rainwater itself is suppressed from penetrating into the back, and is prevented from being carried to the back by strong winds. Even if the watertight sealing material 11 deteriorates due to aging, it will be kept for a long time. It maintains water tightness. Then, it is possible to prevent rainwater from penetrating into the back and reaching the synthetic resin layer 2 of the metal roofing material A on the water side, and to prevent the synthetic resin layer 2 from absorbing water and obstructing the heat insulating property. As a result, it is not necessary to increase the length of the overlap connection portion 4, and it is possible to shorten it.

By the way, in the valley portion of the metal roofing material A under the water, the metal roofing material 1 is grabbed and raised up obliquely to form a water return 14, which is unexpectedly deep into the void 12. Prevents the infiltrated rainwater from going any further,
It is designed to prevent rainwater that has entered the synthetic resin layer 2 from deteriorating the synthetic resin layer 2 at an early stage and lowering its heat insulating property. By the way, there is no synthetic resin layer 2 below the overlapping connection part 4 of the metal roofing material A on the water side, and the heat insulating property is poor. Therefore, dew condensation occurs on the lower surface of the overlapping connection part 4, and such dew condensation collects. Attempts to reach the synthetic resin layer 2 of the metal roofing material A on the water side are prevented by the water return 14.

FIG. 2A is a sectional view of the metal roofing material A in the traveling direction of the wave, and FIG. 2B shows a connection form in such a direction. In the figure, reference numeral 9 denotes a packing. FIG. 3 shows another embodiment, in which a roof base 3 above the water and a roof base 3 below the water.
In (2) and (3), a step H in which the water side is higher with respect to the gradient is formed. A 0.4 mm-thick back plate 5 is laid over the above and below the roof foundations 3 and 3 under the water. The back plate 5 having such a small thickness is bent by screwing the self-drilling screw B, and covers the butt joint portion of the metal roofing materials A, A, thereby preventing moisture from entering such a portion. In this embodiment, the roof base 3 on the water side is raised based on the roof base 3 on the water side, but the roof base 3 on the water side may be raised based on the roof base 3 on the water side. It is. The other configuration is the same as that of the above-described embodiment.

FIG. 4 shows still another embodiment, in which the roof foundation 3 on the water side and the roof foundation 3 on the water side are constructed according to the above-mentioned roof gradient, and the roof foundation 3 on the water side is used.
In this case, a raised portion 15 is fixed by fixing means such as welding or bolts to form a step H in which the water side is higher.
As described above, when the roof foundations 3 and 3 above and below the water are constructed at the reference gradient, the construction can be easily performed. In this case, the back plate 5 is removed and not used.

In the construction in which the step H in which the water surface is higher with respect to the roof gradient is formed between the roof substrate 3 above the water and the roof substrate 3 below the water, A separate process from the construction is required, and the workability is reduced. In such a case, the roof base 3
Is carried out along the above-mentioned roof slope as usual, and the metal roofing material A on the water side and the metal roofing material A on the water side are mounted on the roof foundation 3 with the normal roof slope. In order to connect the overlapped connection portion 4 to the overlapped connection portion 10 in a superposed manner, a spacer (not shown) is interposed at the back portion of the connection portion, and the height of the connection portion is set at the back portion of the connection portion. A high space is formed, and the front end (underwater end) of the overlapped connection portion 4 is screwed with the self-drilling screw B and is close to the overlapped connection portion 10, and thus overlaps with the overlapped connection portion 10. A substantially wedge-shaped space 12 may be formed between the connection portion 4 and the means for forming the wedge-shaped space 12.

FIG. 5 shows still another embodiment, in which the metal roofing material A on the underwater side is cut into the base end of the overlapped connection portion 10 with the backside metal roofing material 7 and the synthetic resin layer 2 by a circular saw or the like. To form slits S. Then, the roof foundations 3 and 3 on the upper and lower sides of the water are installed along the reference gradient, and 0.4-0. A 5 mm-thick, pre-bent back plate 5 is attached, and the connected portion 10 of the metal roofing material A on the underwater side is bent downward at the slit S, and the bent state is applied to the back plate 5. To support it in a predetermined posture. In this case, the metal roofing materials A,
The surface of A is substantially along the reference gradient. The gradient of the overlapped connection portion 10 bent downward is such that water flows down the water.

Incidentally, a guide groove may be formed so that the overlapping connection portion 4 can be easily bent as predetermined. And
The overlap connection portion 4 may be bent in advance at a factory.

[0020]

According to the present invention, as described above, the present invention is bent in an angular wave shape.
Metal roof that is laid and sloped
Metal roofing structure with a synthetic resin layer lined on the back of the board
The roof base under the water and the roof base under the water
In addition, the step where the water side becomes higher based on the above gradient is
Metal roofing material that is formed and placed on the roof base above the water
The metal roofing material placed on the roof base above the water
A step portion due to the step is formed , and a metal roof plate is extended from the synthetic resin layer at a water-side end of the metal roofing material laid on the water side to form an overlapping connection portion, and a water-side portion is formed. Water is applied to the overlapped connection at the water-side end of the metal roofing material
Formed on the underwater end of metal roofing material laid on the upper side
The lap connection is overlapped and the lap connection is centered at the base end.
A substantially wedge-shaped cavity is formed between the overlapped connection portion and the overlapped connection portion, which is bent downward at the center, so that the height increases toward the upper side of the water. The gap between the connection part and the lap connection part is narrow, and for example, watertight treatment can be easily performed by interposing a watertight sealant, for example, by penetrating through the entrance of the void. Although the rainwater stays at the lower entrance due to its surface tension, the rainwater at such an entrance tends to penetrate deep into the connection point by capillary action, but the vacant space is higher , The rainwater can be prevented from penetrating into the interior due to capillary action or the like. And, for example, when a strong wind like a typhoon blows into the space, the space is deeper and deeper and the space spreads out, so the pressure of the strong wind blown from the entrance can be reduced, It is possible to suppress the spread to the deep portion of the connection portion, and as a result, it is possible to suppress blowing of strong wind. In this way, rainwater itself is suppressed from penetrating deeper, and is also prevented from being transported deeper by strong winds. Even if the watertight sealing material deteriorates due to aging, watertightness will be maintained for a long time. There is an advantage that the property can be maintained. And it can avoid that rainwater infiltrates into the back and reaches the synthetic resin layer of the metal roof material on the water side, and can prevent that the synthetic resin layer absorbs water and the heat insulation property is hindered. There is an advantage.
As a result, it is not necessary to increase the length of the overlapping connection portion, and it is possible to shorten the length.

In addition, a step is formed in the roof foundation on the water side and the roof foundation on the water side below, in which the water side is higher based on the above gradient, and the metal roofing material mounted on the roof foundation on the water side and the water A step due to the above-mentioned step is formed between the metal roofing material placed on the lower roof foundation and the overlapping portion of the metal roofing material above the water is bent downward around its base end. Since a substantially wedge-shaped space is formed, the wedge-shaped space is formed. It can be formed by extending the metal roofing material only on the water surface and bending the overlapping connection part formed at the base end downward, and forming the overlapping connection part by extending the metal roofing material Wedge by effectively utilizing the composition of the metal roofing material There is an advantage that it is possible to constitute the cavity of easily. In addition, since the overlapping connection portion on the upper surface side is bent at the connection point, the gradient of the overlapping connection portion is increased (a steep slope), the speed of rainwater flowing down the overlapping connection portion is increased, and the rainwater is overlapped. There is an advantage that it is possible to avoid going around the back side of the part. In addition, since the overlapping connection portion on the upper surface side is bent, the gradient at the lower overlapping connection portion may be unchanged, and the gradient of the overlapping connection portion is further increased as in the case of the configuration in which the overlapping connection portion is bent. The slope does not have to be gentle,
There is an advantage that rainwater can be prevented from leaking by suppressing rainwater from climbing over the connected portion.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, in which FIG.
(B) is an exploded perspective view.

FIG. 2A is a schematic cross-sectional view of the metal roofing material in the same direction as the traveling direction of the corrugated metal roof material, and FIG.

FIG. 3 is a sectional view of another embodiment of the above.

FIG. 4 is a sectional view of another embodiment of the above.

FIG. 5 is a sectional view of another embodiment of the above.

FIG. 6 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal roof plate 2 Synthetic resin layer 3 Roof base 4 Overlap connection part 10 Overlap connection part 12 Void A Metal roof material D Step H Step

Continuing from the front page (72) Inventor Nobuo Yasuoka 3-2-1, Minaseshinmachi, Amagasaki City, Hyogo Prefecture Inside of Daido Steel Co., Ltd. (56) References JP-A-2-269247 (JP, A) Jpn.

Claims (1)

(57) [Claims] 1. A葺設structure of a metal roofing lined synthetic resin layer on the back surface of the corner metal shingles gradient with bent in wave shape are attached葺設, the water side ya
The above gradient is used as a reference between the base ground and the roof base under the water.
A step is formed where the water side is higher, and the roof on the water side
Metal roofing material placed on the foundation and roof foundation on the waterside
Between the metal roof material and the step
Is formed, and a metal roof plate is extended from the synthetic resin layer at the underwater end of the metal roofing material laid on the water side to form an overlapping connection portion, and the metal roof laid on the water side Lumber water
A metal shop laid on the water side at the connected part at the upper end
Lap connection formed at the underwater end of the root material
And the lap joint is bent downward about its base end.
葺設structure of the metal roofing material, characterized in that substantially wedge-shaped voids as water side height is increased, which are formed between the connection portion and the overlapped connection portions to be overlapped is.