JP4917929B2 - Refurbishment structure of existing folded plate roof - Google Patents

Description

  The present invention relates to a modified structure of an existing folded plate roof used when reforming an existing roof formed of a folded plate roof.

  Conventionally, the existing folded plate roof has been repaired by forming and covering a new roof on the existing roof formed of the folded plate. For example, in Patent Document 1, a heat-insulating panel is formed by filling a heat-insulating material between two metal plates, and the fire-resistant and heat-insulating panel is disposed on an existing folded plate roof and a waterproof layer is formed on the surface of the fire-resistant and heat-insulating panel. A new roof is formed by laying and covering the existing folded plate roof.

However, in the invention of Patent Document 1, since the fireproof insulation panel is disposed directly on the existing folded plate roof, it is necessary to fix the fireproof insulation panel to the folded plate formed of a thin metal plate. There was a possibility that the strength of the new roof might be reduced due to wind pressure or thermal stress generated in the fireproof insulation panel due to the low fixing strength of the panel.
JP 2002-61339 A

  This invention is made | formed in view of said point, and provides the repair structure of the existing folded-plate roof which can make the intensity | strength with respect to the wind pressure and thermal stress of the new roof formed on the existing folded-plate roof high. It is for the purpose.

  In the repair structure of the existing folded plate roof according to claim 1 of the present invention, when the existing folded plate roof 1 is covered with the new roof 2 and repaired, the fixing bracket 4 is attached to the tight frame 5 of the existing folded plate roof 1. .. Are provided on the existing folded plate roof 1, and the lower purlin member 6 is attached to the fixed bracket 4, so that the plurality of lower purlin members 6, 6. A plurality of upper purlin members 7, 7... Are laid on the lower purlin member 6 by attaching the upper purlin member 7 to the lower purlin member 6. A plurality of new roofing materials 10, 10... Formed by filling a heat insulating material 9 therebetween are mounted on the upper purlin material 7, and a waterproof layer 11 is provided on the surface of the new roofing material 10. To do.

  The repair structure of the existing folded-plate roof according to claim 2 of the present invention is that, in attaching the upper purlin member 7 to the lower purlin member 6 according to claim 1, every other one at an intermediate position between the adjacent fixing brackets 4, 4. The upper purlin material is arranged on the top.

  The repair structure of the existing folded-plate roof according to claim 3 of the present invention is the upper purlin member for each intermediate position of the adjacent fixing brackets 4 and 4 in attaching the upper purlin member 7 to the lower purlin member 6 in claim 1. It is characterized by comprising.

  The repair structure of the existing folded-plate roof which concerns on Claim 4 of this invention WHEREIN: In any one of Claim 1 thru | or 3, the lower base material 6 and the new roof material 10 are formed in substantially the same length, The lower base material 6 The new roofing material 10 is mounted on the upper purlin material 7 in a state where the end of the roof and the end of the new roofing material 10 are substantially aligned.

  In the invention of claim 1, the new roofing material 10 can be attached to the tight frame 5 of the existing folded plate roof 1 via the fixing bracket 4, the lower purlin material 6, and the upper purlin material 7. The strength against wind pressure, snow accumulation force and thermal stress applied to the new roof 2 can be increased.

  In the invention of claim 2, the wind pressure applied to the new roof 2 through the fixing bracket 4, the lower purlin member 6 and the upper purlin member 7 can be distributed almost uniformly to each fixing bracket 4, and as a result, after the repair Since the wind pressure and snow accumulation force applied to the tight frame 5 can be made substantially the same as before the repair, the roof strength against the external force after the repair is the same as before the repair. Therefore, there is an advantage that the repair can be performed without investigating the strength of the tight frame 5 of the existing folded plate roof 1.

  In the invention of claim 3, the wind pressure applied to the new roof 2 through the fixing bracket 4, the lower purlin member 6 and the upper purlin member 7 can be distributed almost uniformly on each fixing bracket 4, and as a result, before and after the repair. Thus, since the wind pressure and snow accumulation force applied to the tight frame 5 can be made substantially the same as before the repair, the roof strength against the external force after the repair is the same as before the repair. Therefore, there is an advantage that the repair can be performed without investigating the strength of the tight frame 5 of the existing folded plate roof 1.

  In invention of Claim 4, the thermal stress which arises when the new roofing material 10 carries out thermal expansion-contraction can be processed as an internal force of the lower roofing material 6, and the influence on the tight frame 5 by the new roofing material 10 carrying out thermal expansion and contraction. Can be almost eliminated.

  Hereinafter, the best mode for carrying out the present invention will be described.

  In the present invention, a new roof 2 is formed on an existing folded-plate roof 1. The existing folded plate roof 1 has a substantially corrugated cross section, and is formed such that a long crest portion 24 and a trough portion 25 are alternately and repeatedly positioned in the roof inclination direction (the eaves ridge direction). Such an existing folded plate roof 1 is composed of a structural material 20 such as a purlin or a beam of a building, a tight frame 5, and a folded plate roof material 26. The structural material 20 is formed using, for example, H-shaped steel. The folded plate roofing material 26 is formed by bending a metal plate such as a color steel plate or a stainless steel plate so as to be long in the inclination direction of the roof. Yes. The tight frame 5 has a cross-sectional shape substantially the same as the cross section of the existing folded plate roof 1, and the crests 5a and the troughs 5b are alternately formed by bending a rectangular metal plate such as a galvanized steel plate or a stainless steel plate. It is formed so as to be positioned repeatedly. Moreover, the recessed part 5c is formed in the peak part 5a.

  And the existing folded-plate roof 1 is formed as follows. First, the plurality of tight frames 5 are attached to the upper surface of the structural material 20 so as to be aligned in the longitudinal direction of the structural material 20 (direction perpendicular to the inclination direction of the roof). Further, a mounting bracket 45 having an L-shaped cross section is attached to the concave step portion 5 c of the tight frame 5 with a bolt 46, and the hanging element 70 is attached to the tight frame 5 with the mounting bracket 45. The hanging member 70 can be formed of the same metal plate as the tight frame 5.

  Next, while covering the tight frame 5 attached to the structural material 20 with the folded plate roof material 26 from above, a plurality of folded plate roof materials 26, 26... By attaching the folded-plate roof material 26, the existing folded-plate roof 1 can be formed. Here, the folded-plate roof material 26 is arranged long in the inclination direction of the roof so that a plurality of folded-plate roof materials 26, 26... Are arranged in the longitudinal direction of the structural material 20. Further, the valley portion 25 of the folded plate roof material 26 is fitted on the upper side of the valley portion 5 b of the tight frame 5, and the half mountain portion 24 a of the folded plate roof material 26 is placed on the upper surface of the mountain portion 5 a of the tight frame 5. Then, as shown in FIG. 2 (b), the half mountain portions 24 a, 24 a at the ends of the adjacent folded plate roof materials 26, 26 are joined together by goby folding, and the adjacent folded plate roof material 26 is joined by this joined portion 30. , 26 are connected, but when the half-mount parts 24a, 24a are folded together, the hanging element 70 is also bent together. As a result, the folded plate roof material 26 and the tight frame 5 are suspended. 70 can be connected. In addition to joining by goby folding as described above, the adjacent folded plate roof materials 26 and 26 can be connected by joining by bolts or fitting.

  As shown in FIGS. 1 and 2A to 2C, the new roof 2 is formed using a fixing bracket 4, a lower purlin material 6, an upper purlin material 7, a new roof material 10, a waterproof layer 11, and the like. be able to.

  As shown in FIGS. 3 (a) to 3 (c), the fixture 4 protrudes outward from the mounting portion 27 formed in a U shape whose bottom surface is open, and both lower ends of the mounting portion 27. A projecting piece 28 and a mounting piece 29 projecting obliquely downward from the end of the projecting piece 28 and having a bolt part 40 projecting from the upper surface of the mounting part 27 can be used.

  The lower purlin member 6 is a long metal member having a substantially U-shaped cross section. For example, C-shaped steel can be used with its opening facing downward. Further, the upper purlin member 7 is also a long metal member having a substantially U-shaped cross section similar to the lower purlin member 6, and for example, a C-shaped steel is used so that its opening faces sideways. Can do.

  As shown in FIG. 4, the new roof material 10 is a sandwich panel (heat insulation panel) formed by filling a heat insulating material 9 as a core material between two upper and lower (front and back) metal skins 8, 8. The metal shells 8 and 8 are formed by rolling or bending a metal plate having a thickness of about 0.27 to 1.6 mm. In this case, various metal plates such as a stainless steel plate, a galvanized steel plate, an aluminum zinc alloy plated steel plate (trade name “Galvalium Steel Plate”), a coated steel plate, and a vinyl chloride resin-coated steel plate can be used as the metal plate. Both metal shells 8 may have the same thickness or different thicknesses. Moreover, as the heat insulating material 9, the thing of thickness 20-120mm grade can be used. In this case, an inorganic fiber material such as rock wool or glass wool can be used as the inorganic heat insulating material, and a resin foam such as urethane foam, styrene foam, phenol foam or polyisocyanurate foam can be used as the resin heat insulating material. it can. The metal shells 8 and 8 and the heat insulating material 9 can be bonded and integrated. Furthermore, a fitting convex portion 41 is formed over the entire length at one end portion of the new roof material 10, and a fitting concave portion 42 is formed over the entire length at the other end portion of the new roof material 10. Is formed. The remaining two end portions are not formed with the fitting convex portion 41 or the fitting concave portion 42, and the end surfaces thereof are formed flat. Moreover, as the new roofing material 10, you may use what has fire resistance. In addition, the code | symbol 62 in FIG. 4 is a packing.

  As the waterproof layer 11, a waterproof coating or a waterproof sheet can be used. As the waterproof sheet, a soft polymer material having waterproof properties, for example, a soft polyvinyl chloride resin, a polyolefin resin, a vinyl chloride thermoplastic elastomer, a polyolefin In addition to soft thermoplastic synthetic resins such as thermoplastic elastomers, those made of asphalt, modified asphalt, synthetic rubber, or the like can be used. These resin materials or the like may be formed alone, or one or more resin materials may be formed in a laminated state. The waterproof layer 11 is excellent in long-term waterproof property and durability against ultraviolet rays and ozone, but in particular, those made of soft polyvinyl chloride resin can be easily molded by using rolling or the like. Since it can be heat-sealed, it is excellent in economic efficiency and workability and can be suitably used. Although the thickness of the waterproof layer 11 can be 1-3 mm, it is not limited to this.

  And when forming the new roof 2, it carries out as follows. First, a plurality of fixing brackets 4 are attached to the positions of the mountain portions 24 of the existing folded plate roof 1. In attaching the fixing bracket 4, the joint portion 30 of the mountain portion 24 is accommodated in the space below the placement portion 27 and the protruding pieces 28 and 28 are placed on the upper surface of the mountain portion 24 on both sides of the joint portion 30. The mounting pieces 29 and 29 are arranged in contact with both side surfaces of the peak portion 24, and the mounting pieces 29 and 29 are mounted on both side surfaces of the peak portion 24 with a fixing tool 32 such as a drill screw. Here, the fixing tool 32 used at a position corresponding to the tight frame 5 is screwed by penetrating the fixing tool 32 up to the tight frame 5 using a drill screw, thereby fixing the fixing bracket 4 to the tight frame 5.

  Next, the lower purlin member 6 is placed on the placement portion 27 of the fixing bracket 4 while the bolt portion 40 of the fixing bracket 4 attached to the peak portion 24 is vertically penetrated through the lower purlin member 6 and fixed by bolts and nuts. By doing so, a plurality of lower purlin members 6 are arranged on the upper side of the existing folded-plate roof 1. Here, the lower purlin member 6 is disposed long in a direction orthogonal to the peak portion 24 and the valley portion 25 of the existing folded plate roof 1 and is constructed over a plurality of fixing brackets 4, 4.

  Next, the upper purlin member 7 is fixed on the lower purlin member 6 installed above the existing folded plate roof. In order to fix the upper purlin member 7 to the lower purlin member 6, the upper purlin member 7 is placed on the lower purlin member 6 and the L-shaped angle 47 is bolted to the lower purlin member 6 and the upper purlin member 7. By stopping, the lower purlin member 6 and the upper purlin member 7 are connected via the L-shaped angle 47. The upper purlin member 7 is disposed long in the direction parallel to the peak portions 24 and the valley portions 25 of the existing folded-plate roof 1, that is, in the direction orthogonal to the longitudinal direction of the lower purlin member 6, and a plurality of lower purlin members 6, 6. Further, a plurality of upper purlin members 7, 7... Are arranged side by side in the longitudinal direction of the lower purlin material 6.

  Next, the new roofing material 10 is placed on the upper purlining material 7 and fixed to the upper purlining material 7 with a fixing tool 50 such as a drill screw, whereby a plurality of new roofing materials 10, 10. It is constructed over the upper purlins 7 and 7. Here, the new roof materials 10 and 10 adjacent in the inclination direction of the roof (the direction parallel to the longitudinal direction of the upper purlin member 7) are connected by fitting the fitting convex portion 41 and the fitting concave portion 42 together. Moreover, the new roofing materials 10 and 10 which adjoin in the direction orthogonal to the inclination direction of the roof (direction parallel to the longitudinal direction of the lower purlin 6) have a slight gap (about 3 to 6 mm) 61 between the facing end portions. Placed close together.

  Next, the waterproof layer 11 is laid on the upper surface of the new roofing material 10. When the waterproof layer 11 is fixed, a fixed disk 51 is used. As shown in FIG. 5, the fixed disk 51 is a steel plate disk provided with a hot-melt adhesive 52 such as a vinyl chloride resin, a polyester resin, or a fluororesin on the surface. Then, as shown in FIG. 6, before laying the waterproof layer 11, a plurality of fixed disks 51 are arranged on the upper surface of the new roofing material 10 at a predetermined interval (about 70 cm pitch), and the screws passed through the through holes 53. Then, the waterproof layer 11 is laid on the upper surface of the new roofing material 10 including the upper surface of the fixed disk 51, and the portion corresponding to the fixed disk 51 is heated with hot air, electromagnetic induction, or the like to perform hot melt bonding. The material 52 is melted, and then the hot-melt adhesive material 52 is solidified or hardened again to adhere and fix the waterproof layer 11 to the fixed disk 51. Further, when a plurality of waterproof layers 11, 11,... Are used, the end portions (30 to 60 mm) of the adjacent waterproof layers 11, 11 are overlapped and heated, and then the hot melt adhesive layer is solidified again. Or it is preferable to adhere | attach the edge part of the waterproof layers 11 and 11 by making it harden | cure. Further, when asphalt or modified asphalt is used as the waterproof layer 11, a bonding method in which the upper surface of the new roofing material 10 is bonded with an adhesive can be employed. In this way, the seamless construction method in which the waterproof layers 11, 11,... Are joined and integrated has a high degree of freedom and can completely prevent rainwater and the like from entering. For adhesion of the waterproof layer 11, a known automatic welding machine or solvent welding can be used in combination.

  As described above, the waterproof new flat roof 2 can be formed above the existing folded-plate roof 1, and the entire existing folded-plate roof 1 can be covered with the new roof 2 for repair.

  And in this invention, since the new roofing material 10 is attached to the tight frame 5 of the existing folded-plate roof 1 via the fixing metal fitting 4, the lower purlin material 6, and the upper purlin material 7, the existing tight frame 5 is utilized. The new roof 2 can be fixed, and the strength against the thermal stress generated by the wind pressure applied to the new roof 2 and the thermal expansion and contraction of the new roof material 10 can be increased.

  Further, in the present invention, as shown in FIG. 7, the upper purlin material 7 is replaced with the lower purlin material at an intermediate position between the fixing brackets 4, 4 adjacent in the longitudinal direction of the lower purlin material 6. 6 is preferably fixed to the upper surface. In the case of the present invention, wind pressure and snow accumulation force (load at the time of snow accumulation) applied to the new roof 2 are transmitted from the new roof material 10 to the tight frame 5 through the upper purlin material 7, the lower purlin material 6, and the fixing bracket 4. However, when the upper purlin member 7 is fixed to the upper surface of the lower purlin member 6 at an intermediate position between the adjacent fixing brackets 4, 4, wind pressure or pressure is applied from one upper purlin member 7 to the fixing brackets 4, 4 on both sides thereof. Snow load will be distributed almost uniformly. Therefore, since the wind pressure and snow accumulation force applied to the tight frame 5 after the renovation can be made substantially the same as before the renovation, the roof strength against the external force after the renovation remains unchanged, and the strength of the existing folded plate roof tight frame is investigated. There is an advantage that the repair can be performed without the need to do so, and an inadvertent force can be prevented from being applied to a part of the tight frame 5.

  In order to obtain such an effect, in the present invention, every other upper purlin member 7 can be disposed at an intermediate position between the adjacent fixing brackets 4, 4. In this case, the adjacent upper purlin member 7 is arranged. , 7 can be set to be twice the distance d between the adjacent fixing brackets 4, 4. In addition, the upper purlin member can be disposed at each intermediate position between the adjacent fixing brackets 4, 4. In this case, the interval D between the adjacent upper purlin members 7, 7 is the interval between the adjacent fixing brackets 4, 4. It can be made equal to d. As the number of upper purlins 7 is smaller, the weight of the roof is reduced and the cost is reduced. Therefore, it is preferable to arrange the upper purlins at every other position between the adjacent fixing brackets 4 and 4. .

  Moreover, in this invention, as shown in FIG. 8, the dimension of the longitudinal direction of the lower purlin material 6 and the dimension of the new roofing material 10 in the longitudinal direction of the lower purlin material 6 are substantially equivalent length (about 4-5 m). The new roofing material 10 is aligned with the longitudinal end of the lower purlin 6 and the end of the new roofing material 10 where the fitting protrusion 41 and the fitting recess 42 are not formed. Is preferably placed on the upper purlin material 7. Thermal stress due to thermal expansion and contraction of the new roofing material 10 is transmitted to the lower purlining material 6 through the upper purlining material 7. Then, by making the lower purlin material 6 and the new roof material 10 substantially the same length, the thermal stress transmitted from the new roof material 10 to the lower purlin material 6 is absorbed as an internal force of the lower purlin material 6, and the lower purlin material 6 It is hardly transmitted to the tight frame 5 that supports Accordingly, the thermal stress from the new roof material 10 can be hardly transmitted to the tight frame 5, that is, the existing folded plate roof 1.

  FIG. 9 shows another example of the fixture 4. The fixing metal 4 is attached by being locked to the joint portion 30 of the mountain portion 24, and is formed with a pair of clamping members 72, 72 and a locking member 73. A locking portion 74 having a substantially square cross section is formed in the lower portion of the locking member 73. Further, an installation piece 75 projects from the lower end of the clamping member 72 and a placement piece 76 projects from the upper end of the clamping member 72. A fixing bracket can be formed by sandwiching the upper portion of the locking member 73 between the pair of sandwiching members 72 and 72 and coupling the sandwiching members 72 and 72 with a coupling tool 77 such as a bolt and nut.

  The fixing bracket 4 protrudes from the top surface of the mountain portion 24 by placing the installation piece 75 on the top surface of the mountain portion 24, locking the locking portion 74 to the joint portion 30, and tightening the coupler 77. be able to. Then, the lower purlin material 6 can be placed on the placing piece 76 and fixed with a fixing tool such as a screw.

It is a partial sectional view showing an example of an embodiment of the invention. A part of the above is shown, (a) is a plan view, (b) is a cross-sectional view, and (c) is a side view. An example of the same fixing bracket is shown, (a) is a perspective view, (b) is a front view, and (c) is a side view. It is the perspective view in which a part showing the new roof material same as the above fractured. It is a perspective view which shows a fixed disk same as the above. It is a perspective view which shows a part same as the above. It is sectional drawing which shows a part same as the above. It is a top view which shows a part same as the above. The other example of a fixing metal fitting same as the above is shown, (a) is a side view, (b) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Existing folded-plate roof 2 New roof 4 Fixing bracket 5 Tight frame 6 Lower purlin material 7 Upper purlin material 8 Metal outer skin 9 Heat insulation material 10 New roof material 11 Waterproof layer

Claims (4)

  When refurbishing the existing folded-plate roof with a new roof, a plurality of fixing brackets are installed on the existing folded-plate roof by attaching the fixing brackets to the tight frame of the existing folded-plate roof, and the lower base material is fixed By installing the upper purlin on the existing folded plate roof, by attaching the upper purlin to the lower purlin, by installing the upper purlin on the lower purlin, A new roof material formed by filling a heat insulating material between two metal shells is placed on the upper purlin, and a waterproof layer is provided on the surface of the new roof material. Renovated structure of folded plate roof.   The refurbishment of the existing folded-plate roof according to claim 1, wherein, when the upper purlin member is attached to the lower purlin member, the upper purlin member is disposed at every other position in the middle of adjacent fixing brackets. Construction.   2. The repair structure for an existing folded plate roof according to claim 1, wherein when the upper purlin member is attached to the lower purlin member, the upper purlin member is disposed at each intermediate position between adjacent fixing brackets. The lower roofing material and the new roofing material are formed in substantially the same length, and the end of the lower roofing material and the end of the new roofing material are substantially aligned, and the new roofing material is placed on the upper roofing material. The repair structure of the existing folded-plate roof as described in any one of Claims 1 thru | or 3 characterized by these.

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