JP4847153B2 - Roof repair structure and construction method of flat roof building - Google Patents

Description

  The present invention relates to a roof repair structure for a land roof building in which a new roof is provided on a land roof of the building, and a method for constructing the roof repair structure.

  Conventionally, sheet waterproofing and asphalt waterproofing have been generally performed as a waterproof structure on a flat roof of a reinforced concrete apartment or apartment building.

  However, when these waterproof layers are aged, rainwater or the like may enter the lower portion of the waterproof layer due to the occurrence of cracks or peeling, and in some cases, water leakage into the room may occur, which may be inconvenient for the lives of residents. is there.

  In view of such circumstances, conventionally, in order to improve the waterproofness of a building, a renovation work for newly installing a new roof on a flat roof of an existing building has been performed.

  As the repair structure of this flat roof, for example, as shown in FIG. 14, a base 2 made of a truss structure is installed on a flat roof 1 a of an existing building 1 and a new roof is formed on the base 2. It is known (see Patent Document 1).

  The gantry 2 is formed in a substantially shade-shaped cross section, and the roof design is modified from a flat roof to a gable roof by arranging a new roof portion 3 on the gantry 2.

  The gantry 2 is formed by assembling the left and right gantry portions 2a and 2b into a substantially shade-shaped cross section with a joint member 2c and a connecting member 2d. The left and right gantry portions 2a and 2b are respectively composed of an upper chord material 2e and a lower chord material 2f. A three-dimensional truss structure composed of 2 g of lattice material is obtained.

Further, a leg 8 is suspended from the lower joint 7 on the left and right eaves side of the gantry 2, and the leg 8 is fixedly attached to a pedestal 9 on the flat roof 1 a.
JP 2005-98035 A

  However, in the above-described conventional structure for repairing a flat roof, the new roof is structured to be supported only via the legs 8 and the pedestal 9 on the flat roof 1a, so that the new roof adds to the flat roof 1a. A load concentrates on the leg part 8 and the base part 9 on the flat roof 1a, and there exists a problem in yield strength.

  In addition, the existing flat roof building has a problem that the roof slab portion serving as the roof surface is not provided with a proof strength that can support the vertical load applied from the new roof.

  In addition, in existing flat roof buildings that have been built after construction, it may be difficult to identify where the beams and walls are provided on the roof surface. There is a problem that cannot be identified.

  On the other hand, a method for repairing a land roof in which a new roof is installed and supported on a parapet portion of an existing land roof has been conventionally performed.

  However, since the parapet part originally does not have enough strength to support the horizontal force applied to the new roof in the horizontal direction, reinforcement work such as reinforcement of the parapet part itself or provision of a new bridge beam on the flat roof is performed. There is a problem that the workability is deteriorated and the cost is increased.

  Accordingly, the present invention provides a roof renovation structure and a roof refurbishment method for a land roof building that can form a roof renovation structure that minimizes the burden on existing land roof buildings, and that can shorten the construction period and can be constructed at low cost. The purpose is to do.

In order to achieve the above object, the present invention provides a roof renovation structure of a land roof building in which a new roof covering the land roof is provided on an existing land roof of the building, and the new roof is a frame structure provided with a lower beam. in is formed, the plurality of structures as the frame structure is arranged on the flat roof, connecting the support member for connecting and fixing said said lower beam flat roof is of the building is supported by an outer wall of the building The lower beam and the flat roof are connected to each other by an inclined member that is provided on a protruding wall portion that protrudes upward along the outer wall and restricts the horizontal movement of the lower beam, and is positioned in advance on the inclined member. Adjusting means for adjusting the height of the inclined member in accordance with a height position or a position where the connecting support member and the lower surface of the lower beam of the new roof come into contact with each other.

Further, the connecting support member is formed in a substantially U-shaped cross section, is fixed to the upper portion of the projecting wall portion, may be decided to support this receiving said lower beam.

The inclined member has an inclined portion having a predetermined inclination angle with respect to the lower beam, and a connecting piece portion that can be appropriately deformed so that the inclination angle can be changed when the connection is made. Also good.

The adjusting means includes a bundle fixed to the flat roof so that the height can be adjusted, and a large pull fixed to the bundle so that the height can be adjusted. It may be supported by .
Moreover, one structure which becomes the framework structure of the new roof may be divided into a plurality of partial structures.

  Further, the lower beam of the new roof may be provided so as to protrude outward from the land roof, and the protruding portion may be formed so as to allow ventilation inside the new roof.

  Moreover, a heat insulating material may be laid on the flat roof.

  Further, the present invention is a method for constructing a roof repair structure of a flat roof building, wherein the connecting support member is fixed to a protruding wall portion of the flat roof, the inclined member is provided on the flat roof, and the inclined member is provided on the inclined member. The height of the inclined member is adjusted in accordance with a height position preliminarily positioned by an adjusting means or a position where the connection support member and the lower surface of the lower beam of the new roof are in contact with each other, and the new roof is placed on the land roof. The new roof is connected and fixed via the connection support member, and the new roof is supported by the inclined member.

  According to the present invention, by installing a new roof so as to cover the land roof, it is difficult for rainwater to enter the existing land roof portion, and the waterproof property is good.

  Further, according to the present invention, by disposing a plurality of structures to be a framework structure of a new roof side by side on the land roof, it is possible to disperse the application point of the load acting on the existing land roof by providing the new roof. Can do.

  Further, according to the present invention, by providing the connecting support member on the supported portion of the flat roof supported by the outer wall of the building, the vertical direction applied from the newly installed roof to the supported portion of the flat roof having a greater proof strength than other places. The load can be supported.

  Further, the supported portion is a protruding wall portion protruding upward along the outer wall of the building, and the connecting support member is provided on the protruding wall portion and the inclined member that restricts the horizontal movement of the lower beam By connecting the lower beam and the flat roof, the horizontal force applied to the lower beam can be mainly supported by the inclined member, and the horizontal force applied to the protruding wall portion can be reduced.

  Accordingly, the construction period can be shortened and the construction can be performed at low cost without reinforcing the protruding wall portion of the land roof that is not supposed to install a new roof.

  Moreover, the load applied in the horizontal direction of the new roof can be distributed and transmitted to the flat roof via the inclined member.

  Further, by providing the inclined member with an adjusting means for adjusting the height of the inclined member in accordance with the pre-positioned height position or the position where the connecting support member and the lower surface of the lower beam of the new roof are in contact with each other, The installation height of the structure can be determined in advance before installing the structure that is the frame structure of the new roof.

  In addition, by dividing one structural body that becomes a framework structure of a new roof into a plurality of partial structures, the divided partial structures themselves are reduced in size and weight, so that the operation is performed in a state where there are residents in existing buildings. Even if the size of a carry-in path for carrying a structure or the like in a renovation work or a lifting heavy machine is restricted, construction can be easily performed within the restriction.

  In addition, by providing the lower beam of the new roof projecting from the projecting wall to the outside of the building, air can be exhausted from the new roof or outside air at the projecting part. The space between the flat roof and the new roof can be well ventilated.

  Moreover, by laying a heat insulating material on the land roof, it is possible to prevent the heat of sunlight irradiated to the new roof from being transmitted from the attic space between the land roof and the new roof to the living room of the building.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a roof repair structure for a flat roof building according to the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a configuration of a roof repair structure 10 according to an embodiment of the present invention.

  The roof renovation structure 10 according to the embodiment of the present invention is provided for a reinforced concrete apartment house such as a housing complex or a condominium.

  As shown in FIG. 1, a flat roof 12 is provided in the upper part of an existing building 11. A new roof 13 having a substantially shaded cross section is installed on the land roof 12.

  The flat roof 12 is generally configured by a roof slab 12a provided so as to extend from the outer walls 11a and 11a of the building 11, and parapet parts 12c and 12c as protruding wall parts formed as supported parts. .

  The roof slab 12a is provided substantially horizontally between the outer walls 11a and 11a.

  The roof slab 12a is made of reinforced concrete and has a strong shear strength in the in-plane direction, like a hard floor, so that it has a particularly high proof strength against the load applied to the roof slab 12a in the horizontal direction. is doing.

  Moreover, the parapet parts 12c and 12c are each extended so that it may protrude toward the newly installed roof 13 from the upper part of the outer walls 11a and 11a of the building 11. FIG.

  Furthermore, waterproof layers 15 and 15 are respectively coated on the heads 12d and 12d having substantially trapezoidal cross sections of the parapet parts 12c and 12c along the upper end surface and side surfaces of the heads.

  Parapet fittings 16 and 16 as connecting support members for connecting the new roof 13 and the land roof 12 are inclined on the upper surfaces of the waterproof layers 15 and 15 covered with the upper end surfaces of the heads 12d and 12d. Are provided respectively.

  As shown in FIG. 3A, the parapet fitting 16 has a substantially U-shaped cross section.

  In addition, a hole penetrating the bottom surface portion in the plate thickness direction is provided at substantially the center of the bottom surface portion of the parapet metal fitting 16.

  Furthermore, the plate-shaped side wall extended so as to rise upward from both sides of the bottom surface of the parapet fitting 16 is provided with a plurality of holes penetrating the side wall along the edge of the upper end corner. .

  On the other hand, as shown in FIG. 1, on the roof slab 12a of the land roof 12, the base layer 12b which inclines from the one outer wall 11a side toward the other outer wall 11a side is provided.

  Further, a waterproof sheet 14 is laid on the base layer 12b so as to cover the inclined upper surface of the base layer 12b.

  Moreover, both end portions of the waterproof sheet 14 are extended so as to rise along the inner side surfaces of the parapet portions 12c and 12c.

  Further, heat insulating materials 17 and 17 rising along the both end portions are provided inside the both ends of the extended waterproof sheet 14.

  Furthermore, the heat insulation layer 18 is formed to have a predetermined thickness by laying glass wool as a heat insulating material on the waterproof sheet 14. Note that both ends of the heat insulating layer 18 are formed with no space between the heat insulating materials 17 and 17.

  On the other hand, the truss structure 13a as a structure which is a part of the frame structure of the new roof 13 is formed from a wooden member in a substantially shaded cross section.

  As shown in FIG. 2, the truss structure 13 a is installed on the flat roof 12 of the building 11 so that the longitudinal direction thereof is orthogonal to the horizontal direction of FIG. 2, that is, the depth direction of the building 11. .

  Moreover, the truss structures 13a,... Are arranged so that their longitudinal directions are parallel to each other, and are arranged in parallel so as to have a predetermined gap between the truss structures 13a,. Yes.

  On the other hand, as shown in FIG. 1, the truss structure 13a is divided into two parts, partial truss structures 13b and 13b as partial structures.

  The partial truss structures 13b and 13b are assembled symmetrically with respect to the top portion of the new roof 13.

  Further, the partial truss structures 13b and 13b are respectively formed in a cross-sectional right triangle shape from lower horizontal beams 13c and 13c as lower beams, inclined members 13d and 13d, and vertical members 13e and 13e.

  Moreover, abdominal members 13f,... Are arranged in a zigzag manner along the lower horizontal beams 13c, 13c and the inclined members 13d, 13d, respectively, inside the framework of the partial truss structures 13b, 13b.

  The lower horizontal beams 13c and 13c, the inclined members 13d and 13d, and the abdomen 13f are connected to each other via a connecting plate, and the partial truss structures 13b and 13b are also described later. Are connected together via 32,...

  In addition, the lower horizontal beams 13c and 13c, the inclined members 13d and 13d, and the abdomen 13f are connected by a connecting plate not only on the front surface side but also on the back surface side of the truss structure 13a shown in FIG. Has been.

  On the other hand, the lower horizontal beams 13c and 13c respectively extend along the horizontal direction of the building 11 and protrude outward from the outer walls 11a and 11a.

  The inclined members 13d and 13d are provided so as to be inclined toward the top of the truss structure 13a, and one end portions thereof are connected to the outer edges in the longitudinal direction of the lower horizontal beams 13c and 13c. Yes.

  Furthermore, the other end portions of the inclined members 13d and 13d are connected to upper end portions of the vertical members 13e and 13e suspended from the lower horizontal beams 13c and 13c toward the top of the truss structure 13a, respectively.

  The lower ends of the vertical members 13e and 13e are connected to the inner edges in the longitudinal direction of the lower horizontal beams 13c and 13c, respectively.

  Then, base plates 19 and 19 that are waterproofed by a waterproof sheet or the like are provided on the inclined members 13d and 13d along the inclination.

  In addition, although illustration was abbreviate | omitted, this baseplates 19 and 19 straddle the slanting member 13d of the adjacent truss structure 13a on the flat roof 12, ..., and each slanting member 13d, ... It is also supported by a base plate support provided so as to be orthogonal to.

  On the other hand, tiles are arranged in parallel along the inclination on the plate surfaces of the base plates 19 and 19 (not shown).

  In addition, on the eaves portion protruding from the outer walls 11a, 11a of the lower horizontal beams 13c, 13c to the outside of the building 11, plate-like eave heavens 20, 20 are provided via holding members 21,. The lower horizontal beams 13c and 13c are provided substantially in parallel with each other.

  Furthermore, ventilation gaps d and d are respectively provided between the outer wall 11a and 11a side ends of the eaves 20 and 20 and the outer walls 11a and 11a.

  On the other hand, plate-like nasal concealers 22 and 22 projecting downward along the outer end portions are provided at outer end portions in the longitudinal direction of the lower horizontal beams 13c and 13c, respectively.

  In addition, flanges 23 and 23 are attached to the outside of the nose cover 22 and 22 via holding members (not shown).

  On the other hand, the upper ends of the truss brackets 24, 24 as inclined members are fixed to the inner edges in the longitudinal direction of the lower horizontal beams 13c, 13c, and the lower ends are fixed on the foundation layer 12b of the flat roof 12. .

  As shown in FIG. 3B, the truss bracket 24 includes an upper fixed end 24a having a substantially U-shaped cross section fixed to the lower horizontal beam 13c, an inclined portion 24b having a substantially U-shaped cross section, and the roof 12 Plate-like lower fixed end 24c fixed on the underlying layer 12b, and connecting piece portions 24d and 24d integrally connected between the portions 24a, 24b and 24c.

  Of the connecting pieces 24d and 24d, the connecting piece 24d extending from the bottom of the upper fixed end 24a is bent along the inclination direction of the inclined portion 24b and is integrally connected to the bottom of the inclined portion 24b. Has been.

  Also, the connecting piece 24d extending from the bottom of the inclined portion 24b is bent toward the side surface of the lower fixed end 24c and is integrally connected.

  The connecting piece portions 24d and 24d can be appropriately modified so that the inclination angle of the inclined portion 24b of the truss bracket 24 can be changed.

  On the other hand, a plurality of holes (not shown) penetrating the bottom surface portion in the thickness direction are formed on the bottom surface of the upper fixed end 24a on the recess side.

  Further, the plate-like side wall extending so as to rise upward from both sides of the bottom surface on the concave portion side of the upper fixed end 24a is provided with a plurality of holes penetrating the side wall along the upper edge portion.

  Furthermore, a hole penetrating the lower fixed end 24c in the plate thickness direction is formed substantially at the center of the lower fixed end 24c.

  On the other hand, as shown in FIG. 1, between the truss brackets 24, 24, columnar bundles 25 as adjustment means are erected via bundled brackets 25a, 25a fixed on the foundation layer 12b of the flat roof 12. Has been.

Further, large pulls 26 and 26 as adjusting means are provided on the upper edge portion of the bundle 25, and upper ends of truss brackets 24 and 24 fixed to the lower horizontal beams 13c and 13c by the large pulls 26 and 26 , respectively. The upper fixed ends (24a and 24a in FIG. 3B) are supported.

  Next, the roof repair method for constructing the roof repair structure 10 of the flat roof building according to the embodiment of the present invention will be described.

  In the following description of the roof refurbishment method, with respect to the description of the symmetrical structures such as the partial truss structures 13b and 13b and the parapet parts 12c and 12c of the new roof 13 of the roof refurbishment structure 10 Only one of the structures will be described, and the description of the other will be omitted.

  The repair work of the roof repair structure 10 of the flat roof building according to the embodiment of the present invention is performed by a dry work that does not use concrete.

  Moreover, since the repair work of the roof repair structure 10 of the flat roof building which concerns on embodiment of this invention is performed in the state in which the resident exists in the existing building 11, it depends on the size of the conveyance path at the time of construction, a lifting heavy machine, etc. There is a limit.

  Therefore, the truss structure 13a as a framework structure of the new roof 13 is divided into two partial truss structures 13b and 13b in advance in a factory so as to be able to cope with hand transportation, crane lifting and the like.

  First, as shown in FIG. 4, a hole 31 for inserting a concrete plug 27 (hereinafter referred to as a plug 27) is formed in the waterproof layer 15 covered with the head portion 12d of the parapet portion 12c at the repair site.

  The hole 31 is formed so as to reach the inside of the parapet part 12c at a substantially central position of the waterproof layer 15 covered with the inclined upper end surface of the head 12d, and a plug 27 is inserted into the hole 31 for adhesion. It is fixed with an agent.

  And the parapet metal fitting 16 is installed on the waterproof layer 15 so that the hole 31 formed in the waterproof layer 15 and the parapet metal part 12c and the hole provided in the bottom face part of the parapet metal fitting 16 may overlap.

  Further, the fixing screw 28 is inserted into the hole and screwed into the plug 27 to fix the parapet fitting 16 on the parapet portion 12c.

  A plurality of the parapet fittings 16 are provided on the front end surface of the parapet portion 12c in the depth direction of the building 11 orthogonal to the paper surface of FIG.

  Moreover, the installation space | interval of the depth direction of the building 11 of this parapet metal fitting 16 is provided by the space | interval of 450-600 mm.

  Next, holes 30 and 30 that penetrate the waterproof sheet 14 and the base layer 12b and reach the inside of the roof slab 12a at predetermined positions on the land roof 12 are formed at predetermined intervals in the horizontal direction of the building 11.

  Then, the plugs 27 and 27 are inserted into the holes 30 and 30 and fixed to the roof slab 12a with an adhesive or the like.

  Next, one end of each of the bundle fittings 25a and 25a having a substantially L-shaped cross section is fixed to both opposing edge portions on the lower end side of the bundle 25 with nails or screws.

  Moreover, the fixing screws 28 and 28 are inserted into holes (not shown) formed at the other end portions of the bundle metal fittings 25a and 25a, respectively, and screwed into the plugs 27 and 27 of the holes 30 and 30, respectively. The other ends of 25a and 25a are fixed on the base layer 12b. Thereby, the bundle 25 is erected on the foundation layer 12b.

  When the bundle 25 is erected, as shown in FIG. 5, the position of the bundle metal fitting 25a fixed to one side edge portion on the lower end side of the bundle 25 is changed to the bundle metal fitting 25a fixed to the other side edge portion. It is preferable that the bundle 25 is erected vertically in the horizontal direction of the building 11 on the inclined surface of the foundation layer 12b by making it higher than the position of h by an interval h.

  Next, the large pulls 26 and 26 having a rectangular cross section are fixed to the opposite side edges on the upper end side of the bundle 25 with nails or screws.

  As shown in FIG. 6, when the upper fixed ends 24a, 24a of the truss brackets 24, 24 are installed on the upper end surfaces of the large pulls 26, 26, the large pulls 26, 26 are arranged at the upper fixed ends 24a. The bottom surface of the concave portion is fixed so as to have the same height L as the outer corner portion of the bottom surface of the concave portion of the parapet fitting 16.

  Next, the upper fixed ends 24a, 24a of the truss brackets 24, 24 are fixed on the upper end surfaces of the large pulls 26, 26 with nails or screws, respectively.

  Furthermore, fixing screws 28 and 28 are inserted into holes (not shown) formed in the lower fixed ends 24c and 24c, respectively, and screwed into plugs 27 and 27 in the holes 30 and 30 formed in advance. The lower fixed ends 24c, 24c of the truss brackets 24, 24 are fixed on the base layer 12b.

  By the way, although the flat roof 12 is not formed flat due to the inclination of the foundation layer 12b, the longitudinal lengths of the inclined portions 24b, 24b of the truss brackets 24, 24 are appropriately changed, or the connecting piece portions 24d, Are appropriately deformed, and when the truss brackets 24, 24 are fixed on the flat roof 12, the inclined portions 24b, 24b can be provided at desired angles, respectively.

  In addition, when fixed on the flat roof 12, it is preferable that the truss brackets 24, 24 are provided so that the inclination angle of the inclined portions 24b, 24b with respect to the lower horizontal beams 13c, 13c is 45 degrees or 45 degrees or less. With such an inclination, the horizontal force applied to the new roof 13 can be transmitted to the roof slab 12a via the truss support brackets 24 and 24 without any trouble.

  Further, at the time of renovation work, the bundle 25 and the large pulls 26 and 26 play a role of so-called jigs that adjust the height of the truss brackets 24 and 24 and temporarily support the truss brackets 24 and 24.

  Further, when the renovation work is completed, the jigs 25 of the bundle 25 and the large pulls 26 and 26 are removed, and the truss brackets 24 and 24 are applied to the vertical load applied to the truss brackets 24 and 24 from the new roof 13. It is preferable to provide a function of supporting the plate 24 so as to bend in the elastic region.

  That is, the vertical load applied to the flat roof 12 from the new roof 13 acts on the truss support brackets 24, 24 and the parapet parts 12c, 12c, but the parapet parts 12c, 12c and the lower horizontal beams 13c, 13c are parapets. Since they are connected via the metal fittings 16 and 16, the lower horizontal beams 13c and 13c are restrained without moving with respect to the vertical load.

  On the other hand, since the truss brackets 24, 24 can be bent to release the load when a vertical load is applied, the vertical load applied to the flat roof 12 can be supported mainly by the parapet parts 12c, 12c.

  Next, as shown in FIG. 7, the partial truss structures 13 b and 13 b of the new roof 13 assembled in advance in the factory and transported from the factory to the repair site are installed on the land roof 12.

  At this time, in the partial truss structures 13b and 13b, the lower surfaces of the lower horizontal beams 13c and 13c are in contact with the corners of the bottom surface of the concave portion of the parapet fitting 16 and the upper fixed ends 24a of the truss receiving fittings 24 and 24, respectively. , 24a are installed so as to abut against the bottom surface of the recess.

  Next, in a state where the partial truss structures 13b and 13b are installed, each hole formed in the side wall rising from both sides of the bottom surface portion of the parapet fitting 16, and a hole provided in the lower horizontal beam 13c, The new roof 13 and the parapet fitting 16 are connected and fixed by bolting by inserting bolts and fastening with nuts.

  Next, bolts are inserted into the holes formed in the side walls rising from the both sides of the bottom surface portions of the upper fixed ends 24a, 24a of the truss brackets 24, 24 and the holes formed in advance in the lower horizontal beam 13c. The new roof 13 and the upper fixed ends 24a and 24a are connected and fixed by fastening at the above.

  The inclined members 13d and 13d of the partial truss structures 13b and 13b are provided with a connecting plate 32 (32) across both side surfaces of the inner edge adjacent to each other in the longitudinal direction, and the connecting plate is used as the inclined members 13d and 13d. The inclined members 13d and 13d are connected to each other by screwing.

  In addition, the connecting plate 32 (straddling both side surfaces of the inner edges of the lower horizontal beams 13c, 13c adjacent to each other in the longitudinal direction, the lower edges of the vertical members 13e, 13e, and one end edges of the abdominal members 13f, 13f) 32) are provided and screwed to connect the respective members. As a result, the truss structure 13a is formed by integrating the partial truss structures 13b and 13b.

  By the way, the parapet metal fitting 16 and the truss receiving metal fittings 24 and 24 are respectively provided on the flat roof 12 at a predetermined interval (450 to 600 mm) in the depth direction of the building 11 orthogonal to the paper surface of FIG.

  Therefore, when the partial truss structures 13b transported from the factory are sequentially installed, the longitudinal directions of the truss structures 13a,... Are aligned in parallel and the truss structures 13a,. It is arranged in parallel on the flat roof 12 at a predetermined interval (450 to 600 mm) (see FIG. 2).

  In addition, construction of the frame structure of the new roof 13 including the partial truss structures 13b,... Is performed according to the construction standards of the two-by-four method.

  Next, as shown in FIG. 8, after a frame structure such as a partial truss structure 13b,... Is provided on the flat roof 12, the roof structure is applied to the partial truss structure 13b,. 19. Install the nose cover 22, the heel 23, and the roof tile.

  Moreover, while attaching the eave roof 20 via the holding members 21 and 21 to the eaves part which protrudes outside the building 11 from the outer wall 11a of the lower horizontal beam 13c, the outer wall 11a side edge part of the eave ceiling 20 and the outer wall 11a A ventilation gap d is provided between them.

  Furthermore, the attic space 29 between the new roof 13 and the land roof 12 is dried, and the heat insulating material 17 is provided along the edge of the waterproof sheet 14 rising along the inner side surfaces of the parapet parts 12c and 12c.

  And the heat insulation layer 18 is formed so that it may have predetermined thickness from the waterproof sheet 14 by laying the glass wool which is a heat insulating material inside the heat insulating material 17.

  The repair work of the roof repair structure 10 of the flat roof building is completed by the repair process as described above.

  Next, the effect | action of the roof repair structure 10 of the flat roof building which concerns on embodiment of this invention is demonstrated.

  According to the roof repair structure 10 for a flat roof building according to the above-described embodiment, the truss brackets 24 and 24 are provided between the new roof 13 and the flat roof 12 to support the lower horizontal beams 13c and 13c, and the lower horizontal beam. 13c and 13c and the parapet metal fittings 16 and 16 which are connection support members are connected and fixed.

  Thereby, when a load is applied to the horizontal direction of the new roof 13 and a horizontal force acts on the lower horizontal beams 13c, 13c, the parapet brackets 16, 16 try to move in the horizontal direction. Since the movement of the lower horizontal beams 13c and 13c is restricted by 24, almost no horizontal force can be applied to the parapet parts 12c and 12c.

  That is, since the horizontal force applied to the parapet parts 12c, 12c is reduced, the construction period can be shortened without reinforcing the parapet parts 12c, 12c of the land roof 12, which is not originally supposed to install the new roof 13. Low-cost construction is possible.

  On the other hand, by arranging a plurality of truss structures 13a,..., Which will be a framework structure of the new roof 13, on the land roof 12 at predetermined intervals (450 to 600 mm), the truss structures 13a,. The horizontal force applied to each lower horizontal beam can be distributed and transmitted to the flat roof 12 through the truss bracket.

  Thereby, the support burden of the truss receptacle metal fittings and parapet metal fittings which support each truss structure 13a, ... can be reduced.

  On the other hand, since the new roof 13 is installed on the existing flat roof 12 of the building 11, the appearance quality of the building 11 can be improved.

  Moreover, since the installation work of the new roof 13 is all done by dry construction without using concrete, construction at low cost is possible.

  Furthermore, by forming the eaves part protruding from the outer walls 11a, 11a of the building 11 with the new roof 13 installed on the land roof 12, rainwater is less likely to enter the existing land roof 12 part, and the waterproofness is improved. The waterproof property of the entire building 11 is also improved.

  In addition, by providing the lower horizontal beams 13c and 13c of the new roof 13 so as to protrude from the parapet portions 12c and 12c to the outside of the building 11, the exhaust eaves and the like can be used to exhaust the air inside the new roof 13 and the outside air. This can be performed, and the inside of the new roof 13 and the attic space 29 between the existing land roof 12 and the new roof 13 can be well ventilated.

  Further, by appropriately changing the position of the large pulls 26, 26 attached to the bundle 25 or the attachment position between the bundle 25 and the bundle fittings 25a, 25a, the upper portions of the truss brackets 24, 24 supported by the truss structure 13a are fixed. By adjusting the heights of the ends 24a and 24a, the arrangement height of the truss structure 13a can be determined in advance before the truss structure 13a is installed.

  Further, the height positions of the upper fixed ends 24a, 24a of the truss receiving brackets 24, 24 are adjusted to the positions where the lower surfaces of the lower horizontal beams 13c, 13c and the outer corners of the bottom surfaces of the parapet brackets 16, 16 are in contact with each other. Therefore, the arrangement height of the truss structure 13a can be easily determined.

  In addition, since one truss structure 13a that is a framework structure of the new roof 13 is divided into partial truss structures 13b and 13b to reduce the size and weight, in the renovation work performed in a state where there are residents in the existing building 11 Even if the size of the carry-in path for carrying in the truss structure 13a or the like or the lifting heavy machine is restricted, the construction can be easily performed within the restriction.

  Furthermore, since the glass wool heat insulating layer 18 is formed on the ground layer 12b of the renovated flat roof 12, the heat of sunlight irradiated to the new roof 13 is transmitted from the attic space 29 to the living room of the building 11. Can not be.

  In the said embodiment, although the new roof 13 is arrange | positioned on the land roof 12 of the existing building 11 in which the parapet parts 12c and 12c were formed, it is not limited to this, As shown in FIG. The roof refurbishment structure 100 in which the new roof 13 is disposed on the land roof 120 of the existing building 110 in which the eaves 120c and 120c are formed may be used.

  In this roof refurbishment structure 100, eaves 120c, 120c are extended so as to project horizontally outward from the outer walls 110a, 110a at both side edges of the land roof 120 of the existing building 110.

  On the flat roof 120 of the existing building 110 having such a structure, the new roof 13 is disposed on the surface of the roof slab 120a of the flat roof 120.

  And the lower horizontal beams 13c, 13c of the partial truss structures 13b, 13b, which are the frame structure of the new roof 13, are connected via connecting members 160, ... as connecting support members having substantially the same shape as the parapet fitting 16. It is connected to the flat roof 120.

  Further, the connecting members 160,... Are roofs located near the upper surfaces of the supported portions 120d, 120d of the land roof 120 supported by the outer walls 110a, 110a of the building 110 and the boundaries between the partial truss structures 13b, 13b. It is provided on the upper surface of the slab 120a.

  That is, the load applied to the flat roof 120 from the new roof 13 is supported by the supported parts 120d and 120d that are strong against the load in the vertical direction and the roof slab 120a that is strong against the load in the horizontal direction via the connecting members 160. The

  Therefore, the vertical load applied to the flat roof 120 from the new roof 13 is mainly supported by the supported portions 120d and 120d, and the load applied to the vertical direction of the roof slab 120a can be reduced. Can be minimized.

  On the other hand, there are many land roof buildings where the roof is provided with a roof slope or a roof protection material and the roof surface is not flat. When it is difficult to arrange a plurality of connecting members 160,... So as to have the same height on the roof surface of such a flat roof, the installation height of each partial truss structure may vary. There is.

  Therefore, for such a flat roof building, as shown in FIG. 10, a connecting member using a bundle 25 and a large pull 26, 26 on the flat roof 121 of the existing building 111 on which the fences 121 c and 121 c are formed. 160 may be arranged so that the deformed truss structures 130b and 130b as partial structures are installed on the land roof 121.

  That is, before installing the deformed truss structures 130b and 130b on the flat roof 121, the bundle 25 is erected in advance at a substantially central position of the roof slab 121a, and large at the opposite side edges on the upper end side of the bundle 25. The pulls 26 and 26 are fixed, and the connecting member 160 is fixed to the upper end surfaces of the large pulls 26 and 26.

  In addition, the connecting members 160 and 160 are fixed to the upper surfaces of the supported portions 121d and 121d of the land roof 121 supported by the outer walls 111a and 111a of the building 111 in advance.

  Then, the deformed truss structures 130b and 130b are respectively installed on the land roof 121, and the deformed truss structures 130b and 130b are connected and fixed by the connecting members 160 arranged on the roof slab 121a.

  In this way, even on the flat roof 121 having a non-flat roof surface, the connecting member 160 is arranged while appropriately changing the fixing position of the bundle 25 and the large pulls 26 and 26, so that the arrangement position and the arrangement height of the connecting member 160 are increased. It is possible to improve the accuracy.

  Thereby, accuracy, such as the installation height at the time of installing the deformed truss structure 130b, 130b on the flat roof 121, can be improved.

  It should be noted that both side surfaces of the inner edge portion where the inclined members 130d and 130d of the deformed truss structures 130b and 130b are adjacent to each other in the longitudinal direction are fixed with screws by connecting plates 32 (32) provided across the side surfaces. Has been.

  Also, the deformed truss structures 130b and 130b are provided with lower inclined beams 130g and 130g as lower beams inclined toward the respective top portions, and both side surfaces of inner edge portions adjacent to each other in the longitudinal direction are connected to each other. By being connected and fixed by the member 160, the deformed truss structures 130b and 130b are integrated with each other.

  Furthermore, the longitudinal inner edges of the partial horizontal beams 130c, 130c as the lower beams provided at the skirt portions of the deformed truss structures 130b, 130b and the longitudinal outer edges of the lower inclined beams 130g, 130g are: It is connected and fixed via connecting members 160 and 160 fixed to the upper surfaces of the supported parts 121d and 121d.

  The connecting members 160 and 160 fixed to the upper surfaces of the supported portions 121d and 121d receive both horizontal and vertical loads applied via the deformed truss structures 130b and 130b.

  On the other hand, the space between the lower surfaces of the lower inclined beams 130g and 130g of the deformed truss structures 130b and 130b and the upper surface of the roof slab 121a of the land roof 121 may be narrow, and the bundle 25 may not be provided. In such a case, a metal fitting (not shown) that fixes the large pull 26 on the roof slab 121 a without providing the bundle 25 may be installed, and the connecting member 160 may be fixed on the large pull 26.

  The pullings 26 and 26 are fixed as appropriate so that the upper end surfaces of the pullings 26 and 26 protrude from the upper edge of the connecting member 160 and the upper end surfaces of the pullings 26 and 26 have the same height. Fixed. Then, the lower surface of the connecting member 160 connected and fixed to the lower inclined beams 130 g and 130 g is fixed to the upper end surfaces of the large pulls 26 and 26.

  In the above embodiment, the parapet parts 12c, 12c of the land roof 12 and the lower horizontal beams 13c, 13c of the new roof 13 are simply connected by the parapet fittings 16, 16, but are not limited thereto. As shown in FIG. 11, the roof repair structure 200 in which the parapet fitting 224 as the connection support member is provided between the newly installed roof 13 and the parapet portion 12c may be used.

  The parapet metal fitting 224 has substantially the same shape as the truss receiving metal fitting 24 of the above-described embodiment, and includes an upper fixed end 224a, an inclined portion 224b, and a lower fixed end 224c.

  The bottom surface portion of the upper fixed end 224a is fixed on the front end surface of the parapet portion 12c with the waterproof layer 15 interposed therebetween.

  Further, the plate-like side wall extending upward from both sides of the bottom surface portion of the upper fixed end 224a and the lower horizontal beam 13c are connected by bolt joining.

  Further, the lower fixed end 224c is fixed to the roof slab 12a with the base layer 12b interposed therebetween.

  Therefore, even if a horizontal load is applied to the upper fixed end 224a from the lower horizontal beam 13c, the horizontal force is transmitted from the upper fixed end 224a to the roof slab 12a through the inclined portion 224b, and thus is applied to the parapet portion 12c. Horizontal force can be reduced.

  The truss brackets 24 and 24 as the inclined members according to the above embodiments support the partial truss structures 13b and 13b, respectively. However, as shown in FIG. 12, the upper fixed end of the truss bracket is integrated. In addition, a substantially parabolic truss bracket 324 that extends over both the lower horizontal beams 13c and 13c may be used.

  The upper fixed end 324a of the truss bracket 324 is fixed so as to straddle the respective inner edges in the longitudinal direction of the lower horizontal beams 13c and 13c.

  Therefore, since the lower horizontal beams 13c and 13c are connected to each other by the upper fixed end 324a, there is no need to separately connect the partial truss structures 13b and 13b using a connection plate as in the above embodiment. Good sex.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the roof repair structure 10 according to the above embodiment, the lower horizontal beams 13c, 13c of the partial truss structures 13b, 13b are in contact with the outer corners of the bottom surfaces of the parapet fittings 16, 16 on the concave side. However, the present invention is not limited to this, and the lower horizontal beam 13c is appropriately adjusted by appropriately adjusting the projection amount of the head portion of the fixing screws 28, 28 projecting upward from the bottom surface of the recess of the parapet fittings 16, 16. , 13c may be aligned with the lower surface of 13c.

  In addition, the interior of the new roof 13 is ventilated by providing gaps d and d for ventilation between the outer walls 11a and 11a side ends of the eaves 20 and 20 and the outer walls 11a and 11a. However, the present invention is not limited to this. For example, a plate-like eaves-top having a plurality of holes penetrating in the thickness direction may be provided on the eaves portion of the new roof 13 for ventilation.

  Furthermore, the truss structure 13a which is a framework structure of the new roof 13 is divided into two partial truss structures 13b and 13b, but is not limited to this. It may be divided into two or more partial structures according to the workability at the time of renovation work, or an integral one may be used.

  In addition, members such as the lower horizontal beams 13c and 13c of the truss structure 13a which is a frame structure of the new roof 13 may be light steel members.

  Furthermore, in the roof repair structure 10 according to the above-described embodiment, the height of the bundle 25 is adjusted by attaching the large pulls 26, 26 as the adjusting means to the bundle 25 as the adjusting means. For example, the bundle itself may be divided into a plurality of members and each member may be connected in accordance with a desired height.

  Further, although the large pull 26 is used as the means for adjusting the height position of the bundle 25, the height position of the bundle 25 may be adjusted by adjusting the fixing positions of the bundle fittings 25a, 25a and the bundle 25. .

  Further, in the above-described embodiment, the height positions of the upper fixed ends 24a, 24a of the truss receiving brackets 24, 24 are set to the outer corners of the bottom surfaces of the lower horizontal beams 13c, 13c and the bottom surfaces of the parapet brackets 16, 16 on the concave side. The arrangement height of the truss structure 13a is positioned by matching with the position where it contacts, but the parapet brackets 16 and 16 and the truss receiving brackets 24 and 24 are based on the previously positioned height position. May be installed to adjust the arrangement height of the truss structure 13a.

  Moreover, although the parapet fittings 16 and 16 are used as the connection support members according to the above-described embodiment, the present invention is not limited to this, and the new roof and the parapet portion are connected by the roller pin support member 33 as shown in FIG. You may make it the structure to do.

  The roller pin support member 33 is provided with a pin support portion 33a, and a roller moving portion 33b is provided below the pin support portion 33a.

  In the pin support portion 33a, substantially triangular support members that are pivotally supported in the vertical direction with the pin 33c as a boundary are rotatable relative to each other.

  The roller moving portion 33b has a plurality of rollers 33d,... Inserted between the bottom plate portion of the pin support portion 33a and the bottom plate of the roller pin support member 33, and the pin support portion 33a extends in the horizontal direction. Can be moved.

  Accordingly, the horizontal force applied to the lower horizontal beam can be prevented from being directly applied to the parapet portion by the movement of the pin support portion 33a by the roller moving portion 33b.

  Furthermore, the parapet fittings 16 and 16 and the lower horizontal beams 13c and 13c according to the above-described embodiment may be connected by pin joining.

It is sectional drawing which shows the structure of the roof repair structure which concerns on embodiment of this invention. It is explanatory drawing which shows the arrangement structure of a truss structure in the roof repair structure which concerns on embodiment of this invention. (A) is a perspective view which shows the structure of the parapet metal fitting which concerns on embodiment of this invention, (b) is a perspective view which shows the structure of the truss socket metal fitting concerning embodiment of this invention. It is explanatory drawing which shows the state which provided the parapet metal fitting and the bundle on the land roof at the time of the repair work which forms the roof repair structure which concerns on embodiment of this invention. It is explanatory drawing which shows the state which provided the forehead in the bundle | flux on a land roof at the time of the repair work which forms the roof repair structure which concerns on embodiment of this invention. It is explanatory drawing which shows the state which provided the truss metal fitting on the flat roof at the time of the repair work which forms the roof repair structure which concerns on embodiment of this invention. It is explanatory drawing which shows the state which provided the partial truss structure on the flat roof at the time of the repair work which forms the roof repair structure which concerns on embodiment of this invention. It is explanatory drawing which shows the attachment of various roof members at the time of the repair work which forms the roof repair structure which concerns on embodiment of this invention, and a glass wool laying state. It is sectional drawing which shows the structure of the roof repair structure which concerns on Example 1 of this invention. It is sectional drawing which shows the structure of the principal part of the other roof repair structure which concerns on Example 1 of this invention. It is explanatory drawing which shows the structure at the time of attaching a truss receiving bracket between a lower horizontal beam and a parapet part in the roof repair structure which concerns on Example 2 of this invention. It is explanatory drawing which shows the structure of the roof repair structure provided with the truss metal fitting which concerns on Example 3 of this invention. It is explanatory drawing which shows schematic structure of the roller pin support member which concerns on other embodiment of this invention. It is explanatory drawing which shows schematic structure of the roof repair structure which concerns on a prior art.

Explanation of symbols

10, 100, 200 Roof repair structure 11, 110, 111 Building 12, 120, 121 Land roof 12c Parapet part (protruding wall part as supported part)
13 New roof 13a Truss structure (structure)
13b Partial truss structure (partial structure)
130b Deformed truss structure (partial structure)
13c Lower horizontal beam (lower beam)
16, 224 Parapet fitting (connection support member)
24,324 Truss bracket (inclined member)
25 bundles (adjustment means)
26 Daiki (Adjustment means)
33 Roller pin support member (connection support member)
120d, 121d Supported part 130c Partial horizontal beam (lower beam)
130g Lower inclined beam (lower beam)
160 Connection bracket (connection support member)

Claims (8)

A roof renovation structure of a land roof building in which a new roof covering the land roof is provided on the existing land roof of the building,
The new roof is formed of a frame structure with a lower beam,
A plurality of structures to be the framework structure are juxtaposed on the flat roof,
The connection supporting member for connecting and fixing the lower beam and the flat roof is provided on the projecting wall portion which is supported by an outer wall of the building to protrude upward along the outer wall of the building,
The lower beam and the flat roof are connected by an inclined member that restricts horizontal movement of the lower beam,
The inclined member has an adjusting means for adjusting the height of the inclined member in accordance with a pre-positioned height position or a position where the connection support member and the lower surface of the lower beam of the new roof are in contact with each other. A roof renovation structure of a flat roof building characterized by being provided . The roof repair structure according to claim 1 , wherein the connection support member is formed in a substantially U-shaped cross section, is fixed to an upper portion of the protruding wall portion, and receives and supports the lower beam. . The inclined member includes an inclined portion having a predetermined inclination angle with respect to the lower beam, and a connecting piece portion that can be appropriately deformed so that the inclination angle can be changed when the connection is made. The roof repair structure according to claim 1 or 2, wherein The adjustment means includes a bundle fixed to the flat roof so as to be height-adjustable, and a large pull fixed to the bundle so that the height is adjustable.
The roof repair structure according to any one of claims 1 to 3, wherein the inclined member is supported by the pulling . The roof repair structure for a flat roof building according to any one of claims 1 to 4 , wherein one structure which is a framework structure of the new roof is divided into a plurality of partial structures. The lower beam of the new roof is provided so as to protrude outward from the land roof, and the protruding portion is formed so as to allow ventilation inside the new roof.
The roof repair structure of the flat roof building as described in any one of 5 . The roof repair structure for a flat roof building according to any one of claims 1 to 6 , wherein a heat insulating material is laid on the flat roof. The connecting support member is fixed to the protruding wall portion of the flat roof, the inclined member is provided on the flat roof, and the height position previously positioned by the adjusting means provided on the inclined member or the connecting support member The height of the inclined member is adjusted in accordance with the position where the lower surface of the lower beam of the new roof contacts, the new roof is installed on the land roof, and the new roof is connected and fixed via the connection support member. The method for constructing a roof repair structure for a flat roof building according to any one of claims 1 to 7 , wherein the inclined roof is supported by the inclined member.

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