JP4398961B2 - Roof repair method - Google Patents

Description

  The present invention relates to a roof repair method for fixing a new metal folded plate roof material on an existing metal folded plate roof material.

  When the roof material of metal folded plate roofs of large factories, warehouses, gymnasiums, etc. has become obsolete, if this is removed and a new metal folded plate roof material is installed, operation in the factory or use of warehouses, etc. will be conducted during the construction period. Can not be. Then, without removing the existing roof material, installing a new roof material on it via a metal support is performed (for example, refer to the following patent document 1).

In the following Patent Document 1, as a support tool, a C-shaped leg portion corresponding to an inclined surface of a mountain portion of an existing metal folded plate roofing material and a U-shape downwardly formed at the upper end of the leg portion are newly installed. It consists of a receiving part that receives the metal folded plate roofing material, and uses a metal support tool in which a sword bolt is erected on the receiving surface at the upper end of the receiving part, and the legs are inclined as described above for the existing metal folded plate roofing material. It has been proposed to superimpose on a surface and fasten and fix with a screw member, and fasten a new metal folded plate roof material to the receiving part of the support with the sword bolt. Further, in Patent Document 1, it is proposed that a plurality of support members fixed to a plurality of adjacent mountain portions of an existing metal folded plate roofing material are continuously provided with a projecting piece extending between lower ends of the leg portions. ing.
JP-A-8-42070

  By the way, when repairing the roof by installing a new roof material on the existing roof material, a sheet-like sheet is placed between the existing roof material and the new roof material in order to improve the air conditioning effect in the building. An insulating material made of glass wool or the like is interposed.

  However, if insulation is provided between the existing roofing material and the new roofing material, the temperature difference between the existing roofing material and the new roofing material that is directly exposed to the outside air will increase, and the expansion and contraction of both roofing materials will increase. When the difference becomes large and the expansion and contraction of the new roofing material are repeated, the screw member that connects the new roofing material and the support member wobbles. As a result, the screw member through-holes of the newly installed roofing material and the support are expanded, and rattling occurs at the fastening portion of each member, causing rain leakage. Further, metal fatigue occurs around the screw member through hole.

  Even if the heat insulating member is interposed in the space between the two roofing materials, both the roofing materials are connected by the screw member and the metal support, so that heat is transferred from the new roofing material to the existing roofing material through these members. Will be transmitted. Therefore, the heat insulation effect is not sufficient.

  Therefore, the present invention provides a repair of a roof in which a new metal folded plate roofing material is provided on the existing metal folded plate roofing material via a support, and a problem due to a temperature difference between the existing roofing material and the new roofing material is solved. The problem is to provide a roof repair method that can solve the problem and can install a new roofing material on the existing roofing material without rattling and has a good thermal insulation effect.

The present invention is a roof repair method of installing a newly installed metal folded plate roof material covering the existing metal folded plate roof material via a support tool on an existing metal folded plate roof material,
The support has a two-layer structure in which a metal plate provided with a large-diameter screw member through hole is overlapped and joined to the upper surface of a thick heat insulating member made of synthetic resin and having elasticity,
From the screw member through hole in which a seat plate made of heat-insulating hard synthetic resin is slidably mounted on the metal plate of the support, and the seat plate, the screw member through hole, and the heat insulating member are penetrated. Fasten the support to the peak of the existing metal folded plate roofing material with a small-diameter screw member, and screw and fix the roof base material to the metal plate of each support,
A new metal folded plate roofing material is screwed and fixed to the roof base material (claim 1).

When the new metal folded plate roofing material is thermally expanded and contracted with respect to the existing metal folded plate roofing material, the heat insulating member elastically deforms the roof base material and the metal plate of the support member which are coupled to this with the screw member. It is displaced with the new roofing material. However, the screw member penetrating the support and having the lower end fastened to the existing roofing material does not contact the metal plate due to the large-diameter through hole. The seat plate is slidable with respect to the metal plate. Therefore, even if the metal plate is displaced, the screw member fastened to the existing roof material does not wobble.

  Heat is transferred from the new roofing material to the metal plate of the support. However, since the metal plate and the existing roof material are insulated by the heat insulating member of the support, and the screw member and the metal plate are insulated by the seat plate and are not in contact with the large diameter and the screw member through-hole, the new roof material Heat is not transferred from the roof to the existing roofing material.

  As the heat insulating member, a closed cell foam of heat insulating synthetic resin is used (Claim 2). It is suitable as a heat insulating member and exhibits waterproofness.

  A rib that contacts the metal plate of the support is provided on the lower surface of the seat plate. The abutment area with the metal plate is reduced by the ribs, and the slidability of the seat plate with respect to the metal plate is improved.

The above-mentioned supporting tools provided on each mountain portion of the existing metal folded plate roofing material are arranged in a horizontal line, and the above-mentioned roof base material having a substantially hat-shaped cross-section is formed so as to straddle each supporting tool. A new metal folded plate roofing material is screwed and fixed to the roof base material (Claim 4). A new roofing material can be stably installed by a long roof base material extending in a horizontal line .

  As shown in FIG. 1, an existing metal folded plate roofing material (hereinafter simply referred to as an existing roofing material) 1 is a corrugated plate in which peak portions 10 and valley portions 11 are continuously formed in parallel to each other. Placed and fixed. The existing roofing material 1 is screwed and fixed via a tight member (not shown) installed and fixed on the upper surface of the main building M.

A new metal folded plate roofing material (hereinafter simply referred to as a new roofing material) 2 is formed through a trough portion 21 with a small mountain portion 20 whose top end position coincides with the mountain portion 10 of the existing roofing material 1. Yes. The newly installed roofing material 2 has a support 3 fixed to the mountain portion 10 of the existing roofing material 1, a metal roof base material 8 is installed on the support 3, and is installed on the base material 8. is there.

  The eaves of the new roofing material 2 are curved downward, and a long L-shaped rail 27 is provided along the eaves, and a rain gutter 29 is provided through a hanging metal fitting 28.

  As shown in FIG. 2, the support 3 has a two-layer structure composed of a synthetic resin heat insulating member 4 having a thickness of about 25 to 35 mm and having elasticity, and a metal plate 5 superimposed on the upper surface. The heat insulating member 4 is composed of a closed cell foam of a heat insulating synthetic resin, for example, a closed cell foam such as urethane foam. The hardness is about 35 degrees. The heat insulating member 4 is formed in a rectangular parallelepiped having a width of about 40 mm and a length of about 130 mm in accordance with the upper surface of the mountain portion 10 of the existing roof material 1.

  The metal plate 5 is a rectangular flat plate coinciding with the upper surface of the heat insulating member 4 and is formed of a steel plate having a thickness of about 2.3 mm. A large-diameter screw member through hole 50 having a diameter of about 20 mm is formed in the center of the metal plate 5. The metal plate 5 is superposed on and bonded to the upper surface of the heat insulating member 4. The heat insulating member 4 is also formed with a through hole 40 coaxially with the screw member through hole 50 of the metal plate 5, and the hole diameter of the through hole 40 is a screw member 7 (fastening the support 3 to the existing roof material 1 ( The screw shaft for the metal plate, which has a screw shaft diameter of about 6 mm) can be penetrated.

  On the support 3, a seat plate 6 made of hard synthetic resin is placed on the upper surface of the metal plate 5. The seat plate 6 is sized to cover the screw member through-hole 50 of the metal plate 5 and is formed in a square shape having a length of about 30 mm and a width of about 50 mm, and a through-hole 60 capable of penetrating the screw shaft of the screw member 7 is formed at the center. It is formed. The seat plate 6 is formed with ribs 61, 61 projecting downward on both side edges along the lateral direction. Both ribs 61, 61 are formed in a semicircular cross section and project downward about 2 mm. The seat plate 6 is also formed with ribs 61, 61 along both side edges on the upper surface side so that it can be used without distinction between the front and back sides.

  The support 3 is configured so that the seat plate 6 is placed on the upper surface of the metal plate 5 in a direction orthogonal to the longitudinal direction, and ribs 61 and 61 on both side edges of the lower surface of the seat plate 6 are applied around the screw member through holes 50 of the metal plate 5. The screw member 7 is passed through the through holes 60, 50, and 40 of the seat plate 6, the metal plate 5, and the heat insulating member 4 in series from above.

  As shown in FIG. 1 to FIG. 4, the support 3 is placed by superposing the lower surface of the heat insulating member 4 on the top surface of the mountain portion 10 of the existing roofing material 1 along the longitudinal direction thereof. The tip of the penetrating screw member 7 is screwed into the top surface of the peak portion 10 and fixed. In this case, when the screw member 7 is tightened more than necessary, the heat insulating member 4 is crushed and deformed. Therefore, the tightening torque at the time of tightening the screw member 7 is set to such an extent that the heat insulating member 4 is not crushed and deformed. In addition, since the seat plate 6 is in contact with only the lower ribs 61, 61 against the metal plate 5, the seat plate 6 and the metal plate 5 can slide relative to each other.

  Further, a plurality of support tools 3 are arranged and fixed at a plurality of peak portions 10 of the existing roofing material 1 and at linear positions in a direction orthogonal to the respective peak portions 10. And the elongate roof base material 8 extended in the horizontal direction of the existing roof material 1 is fixed to the arranged several support tool 3 along these. The support 3 may be installed in each mountain portion 10 of the existing roof material 1 or may be installed every several rows of the mountain portions 10.

  The base material 8 has a substantially hat-shaped cross section with a convex portion 81 and a flange portion 82 projecting from both sides thereof. The base material 8 is orthogonal to the metal plate 5 of each support 3 and straddles the seat plate 6 on the metal plate 5 and the head of the screw member 7, and the flange portions 82 on both sides are at both ends in the longitudinal direction of the metal plate 5. Placed. Then, a metal plate drill screw type screw member 85 is screwed into the metal plate 5 from above the flange portion 82 to fix the base material 8 to the support 3.

  In this way, a plurality of base materials 8 are arranged in parallel on the existing roof material 1, and the new roof material 2 is placed and fixed on these base materials 8. Prior to this, a thick sheet-like heat insulating material S made of glass wool or the like is laid on the existing roof material 1. As shown in FIGS. 3 and 4, the fixing structure of the newly installed roofing material 2 is a long metal plate drill screw type screw from the top to the top surface of the convex portion 81 of the base material 8 as shown in FIGS. This is done by screwing the member 25 in. In this case, a washer 26 having a sealing material on the back surface is interposed between the head portion of the screw member 25 and the peak portion 20.

  In the roof repair method described above, a large number of supports 3 are installed on the existing roof material 1, but the support 3 to be used is small and lightweight, and the cost is low.

  When the new roofing material 2 is thermally expanded and contracted by the outside air temperature, it is joined by the new roofing material 2 and the screw member 25 as shown in FIGS. 3 (A) and 3 (B) and FIGS. 4 (A) and 4 (B). The roof base material 8 and the metal plate 5 of the support 3 coupled to the base material 8 by the screw member 85 move in conjunction with the newly installed roof material 2 due to the elastic deformation of the heat insulating member 4. In this case, the screw member 7 penetrating the seat plate 6 and the support 3 and having the lower end fastened to the existing roofing material 1 is in contact with the heat-insulating member 4 that is elastically deformed, but is significantly different from the metal plate 5. The screw plate 7 is not affected by the movement of the metal plate 5 and does not wobble with respect to the existing roofing material 1 because the seat plate 6 slides on the metal plate 5 without contact with the through hole 50 having a diameter. Therefore, loosening and damage do not occur at the fastening portion with the existing roof material 1.

  On the other hand, regarding the heat insulation effect, the outside air temperature is transmitted from the newly installed roofing material 2 to the metal plate 5 of the support portion 3 through the base material 8. However, the metal plate 5 and the existing roof material 1 are thermally blocked by the heat insulating member 4. Further, the metal plate 5 and the screw member 7 are not in contact with each other, and the metal plate 5 and the screw member 7 are connected via the seat plate 6, but the seat plate 6 is formed of a heat insulating material. Therefore, the screw member 7 and the metal plate 5 are thermally blocked. Thus, heat is not transmitted from the newly installed roofing material 2 to the existing roofing material 1 through the members interposed between the two roofing materials 2 and 1.

  Insulation between the two roofing materials 2 and 1 is more completely exhibited by laying a heat insulating sheet S in the space between the two roofing materials 2 and 1.

  Next, another embodiment of the present invention will be described with reference to FIGS. Some existing metal folded plate roofs have a structure in which the side edges of a plurality of existing roofing materials 1 </ b> A are jointed at the top of the mountain portion 10, and in this case, the joint 10 </ b> A protrudes from the mountain portion 10. In the present embodiment, a repair method for installing a new metal folded plate roofing material 3 on an existing roof joint roof is shown.

  In the construction method of the present embodiment, the support 3 is placed on the existing roof material 1 via a bracket 9 that covers the goat joint 10A of the mountain portion 10 thereof. The bracket 9 is formed of a metal plate having a substantially chevron cross section provided with a flat upper surface portion 91 and inclined portions 92 and 92 extending obliquely downward from both left and right side edges thereof.

  The bracket 9 covers the upper part of the peak part 10 of the existing roofing material 1 and the seam joint 10A from above with the upper surface part 91, and the left and right inclined parts 92, 92 are overlapped on the inclined surface of the existing roofing material 1. In addition, both inclined portions 92 and 92 are fastened and fixed by metal plate drill screws 93 and 93. The same support tool 3 as that used in the previous embodiment is placed on the upper surface portion 91 of the bracket 9 thus installed, and the support tool 3 is fastened and fixed by the screw member 7. As in the previous embodiment, the base material 8 is fixed to the support 3, and a new roof material (not shown) is installed through the base material 8.

  According to the present embodiment, the support 3 can be stably installed on the existing seam-type roofing material 1 via the bracket 9, and a new roofing material can be suitably installed. Insulation between the new roofing material and the existing roofing material is also demonstrated.

  The bracket used for the roof joint type roofing material is not limited to the bracket 9 as long as it has a flat surface portion that covers the mountain portion of the existing roofing material and the seam joining portion and on which the support is placed. Good.

It is explanatory drawing which shows the whole structure of the repair roof by the construction method of this invention. It is a disassembled perspective view which shows the support tool used for the construction method of this invention. FIG. 3A is a cross-sectional view in a normal state, and FIG. 3B is a cross-sectional view illustrating a state in which a newly-installed roof material is thermally expanded and contracted. FIG. 4A shows a cross section along the longitudinal direction of the repaired roof corresponding to FIG. 3, FIG. 4A shows a cross-sectional view in a normal state, and FIG. 4B shows a state in which the newly installed roof material is thermally expanded and contracted. It is sectional drawing. FIG. 9 is a cross-sectional view showing another embodiment of the present invention and showing a repair method for an existing goby joint roof. It is principal part sectional drawing which shows the state which mounted the support tool using the bracket of the said repair construction method.

Explanation of symbols

1 Existing metal folded plate roofing material 10 Mountain 2 New metal folded plate roofing material (new metal folded plate roofing material)
21 mountain part 3 support tool 4 heat insulating member 5 metal plate 50 screw member through hole 6 seat plate 61 rib 7 screw member 8 roof base material S sheet-like heat insulating member

Claims (4)

In the roof repair method of installing a new metal folded plate roofing material covering the existing metal folded plate roofing material via a support,
The support has a two-layer structure in which a metal plate provided with a large-diameter screw member through hole is overlapped and joined to the upper surface of a thick heat insulating member made of synthetic resin and having elasticity,
From the screw member through hole in which a seat plate made of heat-insulating hard synthetic resin is slidably mounted on the metal plate of the support, and the seat plate, the screw member through hole, and the heat insulating member are penetrated. Fasten the support to the peak of the existing metal folded plate roofing material with a small-diameter screw member, and screw and fix the roof base material to the metal plate of each support,
A roof repair method in which a new metal folded plate roofing material is screwed and fixed to the roof base material .   The roof repair method according to claim 1, wherein a closed cell foam of a heat insulating synthetic resin is used as the heat insulating member.   The roof repair method of Claim 1 or 2 which provided the rib which contact | abuts the said metal plate of the said support tool in the lower surface of the said seat plate. The above-mentioned supporting tools provided on each mountain portion of the existing metal folded plate roofing material are arranged in a horizontal line, and the above-mentioned roof base material having a substantially hat-shaped cross-section is formed so as to straddle each supporting tool. The roof repair method according to any one of claims 1 to 3, wherein the roof is fixed to a plate and a new metal folded plate roof member is screwed and fixed to the roof base material.