JP5939443B2 - Reinforced structure of sloped roof - Google Patents

Description

  The present invention relates to a reinforcing structure for a sloped roof of a wooden building, and particularly relates to a structure for reinforcing a roof part covering an upper part of an incidental space such as a piloti or an alcove around a building body.

  2. Description of the Related Art Conventionally, as a sloped roof of a wooden framed house, a structure in which a purlin is supported by climbing beams and bundles and a rafter is supported by these purlins is known (for example, see Patent Document 1).

  As shown in FIG. 8 and FIG. 9, the roof 51 located near the end of the sloped roof 50 in the row direction covers the upper part of the incidental space S such as a piloti or an alcove provided around the housing main body H. In this case, when the roof portion 51 is viewed from the end face (breaking wind surface) side (when viewed from the direction indicated by the arrow), a step 52 along the gradient direction is generated on the back surface of the eaves. There was a problem of being bad. That is, as shown in FIG. 10, the loose portion 53 of the roof portion 51 is thin and clear, whereas the climbing beam 54 and the purlin 55 exist in the portion on the back side of the loose portion 53. For this reason, it is thicker than the portion 53, and a step 52 along the gradient direction occurs at these boundary portions. 8 to 10, 56 is a column provided in the incidental space S, 57 is an eaves girder, 58 is a roof tile, 59 is a field board, 60 is an eaves back board, 61 is a rafter, and 62 is a rafter. Show.

  If the climbing beam 54 and the main building 55 can be eliminated in the roof portion 51 of the sloped roof 50, when the roof portion 51 is viewed from the end face (windbreak surface) side, a step 52 along the slope direction on the back surface of the eaves. The back side of the eaves is continuous from the windbreak surface to the back side, making it a light and clean appearance.

JP 2001-90242 A

  However, if the climbing beam and the main building are abolished in the roof part where the lower part is an ancillary space, there is a problem that the rigidity of the roof part is remarkably lowered and the resistance to vertical load and horizontal load is weakened. In order to maintain the rigidity of the roof well, the arrangement interval of rafters should be very close (for example, when a rafter frame without a 3m purlin is planned in the gradient direction, rafters are arranged at intervals of 50 mm in consideration of snow cover. However, in this case, there is a problem that the construction of the portion becomes difficult (the stable overhanging of the rafter becomes difficult) and the construction becomes difficult.

  This invention solves the above problems, and in the roof part covering the upper part of the incidental space such as the piloti and alcove around the building body, the rigidity can be maintained well even if the climbing beam and the main building are eliminated, and the roof It aims at providing the reinforcement structure of the gradient roof which can improve the designability of a part.

  In order to solve the above-mentioned problem, the slope roof reinforcing structure of the present invention eliminates the climbing beam 10 and the main building 11 in the roof portion 2 covering the space S around the building body H in the sloped roof 1 of the wooden building. In addition, a plurality of wooden rafters 13 are bridged between wooden horizontal members 12 arranged at intervals in the gradient direction with a gap in the row direction, and a plurality of steel made so as to follow these wooden rafters 13. The reinforcing member 14 is bridged, the wooden rafter 13 and the steel reinforcing member 14 are connected, and the steel reinforcing member 14 is fastened to the wooden horizontal member 12 via a joint fitting 20.

  Moreover, in the loose part 3 of the said roof part 2, while arrange | positioning the 1st and 2nd steel reinforcements 14A and 14B along the both sides | surfaces of the wooden rafter 13A of the outermost end, A third steel reinforcing member 14C is arranged along one side surface of the wooden rafter 13B adjacent to the wooden rafter 13A, and the second steel reinforcing member 14B and the third steel reinforcing member 14C facing each other are arranged. In the meantime, a plurality of steel retainers 30 are passed in a gradient direction at intervals, and along the extension lines of these steel retainers 30, a plurality of steel ladle braces from the first steel reinforcing material 14A. 31 is overhanging.

  Further, the steel reinforcing member 14, the steel retainer 30, and the steel ladle 31 are arranged so as to be within the height dimension of the wooden rafter 13. Further, a wooden laver rafter 32 for fixing the field board 16 and the eaves back board 17 is attached to the steel ladle arm 31 described above. Furthermore, the roof part 2 has a length dimension of 1.5 m or more in the gradient direction and the row direction.

  In the reinforcing structure of the sloped roof according to the present invention, the climbing beam and the main building are abolished in the roof part covering the upper side of the incidental space. Steps along the gradient direction can be eliminated, and the back of the eaves will be flush from the windbreak surface to the back side, giving a light and clean appearance across the roof. The design of the roof portion can be improved.

  In addition, a steel reinforcing material is provided so as to follow the wooden rafter, the wooden rafter and the steel reinforcing material are connected, and the steel reinforcing material is fastened to the wooden horizontal member via a joining bracket. By reinforced the entire roof part, even if the climbing beam and the main building are abolished, it can maintain the rigidity of the roof part well and can effectively resist vertical load and horizontal load, It is possible to perform the construction of the loose part without any trouble.

  In addition, the rigidity of the roof part can be further enhanced by adding a steel retaining material and a steel brace arm and reinforcing it more firmly in the part of the roof part that tends to be weak in strength. it can.

  Furthermore, by arranging the steel reinforcement, steel retaining material, and steel ladle arm so that it fits within the height dimension of the wooden rafters, the thickness of the roof is not increased and the roof is light. Good appearance can be maintained without impairing the feeling.

It is a perspective view of the roof part of the gradient roof which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of a roof part. It is a perspective view which shows the construction procedure of the frame part of a roof part. It is a top view of the frame part of a roof part. It is a figure which shows the fixation structure to the eaves girder of steel reinforcement. It is a longitudinal cross-sectional view of the loose part of a roof part. It is a figure which shows the fixing structure of a steel buckle and a steel brim bracelet. It is a perspective view of the roof part of the conventional gradient roof. It is a longitudinal cross-sectional view of the conventional roof part. It is a longitudinal cross-sectional view of the loose part of the conventional roof part.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the sloped roof 1 of a wooden frame house according to an embodiment of the present invention includes a roof portion 2 that covers an upper part of an incidental space S such as a piloti or an alcove provided around the housing body H. Yes. The roof portion 2 is located near the end of the sloped roof 1 in the direction of the traversing direction, has a loose portion 3 and an eaves portion 4, and is supported by a column body 5 provided in the incidental space S. The length dimension of the roof portion 2 in the gradient direction and the crossing direction is 1.5 m or more.

  As shown in FIGS. 2 to 4, the roof portion 2 has a climbing beam 10 and a purlin 11 that are abolished, and between the eaves beams 12 that are wooden horizontal members arranged at intervals in the gradient direction. A wooden rafter 13 made of a plurality of square members is spanned at intervals in the direction of the beam, and a steel reinforcing member 14 made of a plurality of grooved steel pieces with lips is bridged so as to follow these wooden rafters 13. ing. On the other hand, most of the sloped roof 1 excluding the roof portion 2 has a general structure including climbing beams 10 and a purlin 11. 2 to 4, reference numeral 15 denotes a roof tile, 16 denotes a field board, 17 denotes an eaves back board, 18 denotes an eaves front purlin, and 19 denotes a windbreak base plate.

  The wooden rafter 13 and the steel reinforcing member 14 are connected by screws or bolts and are in an integrated state. Specifically, the side surfaces of the wooden rafters 13 and the webs of the steel reinforcing members 14 are connected in a superimposed state.

  Further, as shown in FIG. 4, the steel reinforcing material 14 has both end portions (a ridge side end portion and an eaves side end portion) fastened to the eaves girder 12 via a joint fitting 20. As shown in FIG. 5, the joint fitting 20 includes an L-shaped first fixing plate 21 and an inclined plate-like second fixing plate 22 rising from the first fixing plate 21, and the first fixing plate 21. Is fixed to the eaves girder 12 by fixing the second fixing plate 22 to the mounting plate 24 of the steel reinforcement member 14 with bolts 25. ing.

  And in the loose part 3 of the roof part 2, as shown in FIG.3, FIG4 and FIG.6, 14A of 1st and 2nd steel reinforcements 14A along the both sides | surfaces of the wooden rafter 13A of the outermost end. , 14B (the first and second steel reinforcing members 14A, 14B are arranged so as to sandwich the wooden rafter 13A from both sides), and the wooden rafter 13B adjacent to the wooden rafter 13A at the outermost end A third steel reinforcing material 14C is arranged along one side surface (side surface facing the wooden rafter 13A at the outermost end) on the end face (breaking wind surface) side.

  Between the second steel reinforcing member 14B and the third steel reinforcing member 14C facing each other, a steel retaining member 30 made of a plurality of lip-shaped channel steels is provided at intervals in the gradient direction. Then, along the extension lines of these steel retainers 30, steel ladle arms 31 made of a plurality of lip-shaped channel steels are projected from the first steel reinforcing member 14A in the direction of the rows.

  As shown in FIG. 7, the connection between the second and third steel reinforcing members 14B and 14C and the steel retaining member 30 is connected to the mounting plates 24 of the second and third steel reinforcing members 14B and 14C. The mounting plate 40 fixed to both ends of the steel backing material 30 is fixed by bolts 41. Further, the connection between the first steel reinforcing member 14A and the steel ladle arm 31 is made by attaching the mounting plate 24 of the first steel reinforcing member 14A to the one end of the steel lamellar arm 31. 42 is fixed by a bolt 43. Furthermore, the mounting plate 42 of the brace 31 made of steel, the mounting plate 24 of the first steel reinforcing member 14A, the first steel reinforcing member 14A, the wooden rafter 13A, the second steel reinforcing member 14B, the second The steel bolt 31, the first steel reinforcing member 14A, and the wooden rafter 13A are obtained by screwing and tightening the nut 45 to the tip of the long bolt 44 that penetrates the mounting plate 24 of the steel reinforcing member 14B. The second steel reinforcing material 14B and the steel retaining material 30 are integrated.

  Further, a wooden laver rafter 32 for fixing the base plate 16 and the eaves back plate 17 is attached to the steel ladle 31 by screws or bolts and is in an integrated state. Specifically, the side surface of the rafter 32 made of wood and the web of the brace 31 made of steel are connected in a superposed state.

  The steel reinforcing member 14, the steel retainer 30, and the steel ladle arm 31 have the same cross-sectional size and shape and are arranged so as to be within the height dimension of the wooden rafter 13. Therefore, even if the steel reinforcing member 14, the steel retainer 30, and the steel ladle 31 are provided to reinforce the roof portion 2, the thickness of the roof portion 2 is not increased.

  Since the climbing beam 10 and the main building 11 are abolished in the roof portion 2 having the above-described configuration, as shown in FIGS. 1 and 6, when the roof portion 2 is viewed from the end face (windbreak surface) (arrow) (When viewed from the direction illustrated in FIG. 5), the steps along the gradient direction can be eliminated on the back surface of the eaves, and the back surface of the eaves is continuous from the windbreak surface to the back side. It is possible to have a light and clean appearance over the entire area.

  Moreover, a steel reinforcing member 14 is provided so as to follow the wooden rafter 13, the wooden rafter 13 and the steel reinforcing member 14 are connected, and both ends of the steel reinforcing member 14 are joined to the eaves girder 12. The roof portion 2 as a whole is reinforced by being tightened through the metal fittings 20, and the steel rod 30 and the steel rod 31 are added to the hardened portion 3 where the strength is weak. Therefore, even if the climbing beam 10 and the purlin 11 are abolished, the rigidity of the roof portion 2 having a length dimension of 1.5 m or more in the gradient direction and the crossing direction can be maintained well, and the vertical load and the horizontal load can be maintained. It can resist effectively.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above embodiment, the steel reinforcements are arranged on both sides only for the wooden rafter at the outermost end, but the steel reinforcements may be arranged on both sides for the remaining wooden rafters. Moreover, as a roof part which covers the upper part of incidental space, it is not restricted to what has a crack part and the eaves part (It covers the upper part of the incidental space opened to the eaves side and the windbreak side), and a loose part is covered. Do not have eaves part (covering the upper part of the incidental space opened only on the eaves side), or do not have eaves part with flared parts (only on the breezes side) It may be one that covers the upper side of an open incidental space).

  H ・ ・ Housing body (building body), S ・ ・ Attachment space, 1 ・ Sloped roof, 2 ・ ・ Roof part, 3 ・ Karaba part, 10 ・ ・ Climbing beam, 11 ・ ・ Main building, 12 ・ ・Girder (wooden horizontal material), 13, 13A, 13B ... Wooden rafters, 14, 14A, 14B, 14C ... Steel reinforcements, 16 ... Field plate, 17 ... Eave back plate, 20 ... Joint fittings , 30 ··· Steel retaining material, 31 · · Steel lava brace, 32 · · Wooden lava rafter

Claims (4)

In the roof part (2) covering the upper part of the incidental space (S) around the building body (H) in the sloped roof (1) of the wooden building, the climbing beam (10) and the main building (11) are abolished and are spaced in the slope direction A plurality of wooden rafters (13) are bridged between the wooden horizontal members (12) arranged with a gap in the direction of the direction of the rows, and a plurality of steel rafters (13) are attached to the wooden rafters (13). The steel reinforcing material (14) is bridged with the wooden rafter (13) and the steel reinforcing material (14), and the steel reinforcing material (14) is joined to the wooden horizontal material (12). 20) a reinforcing structure of a sloped roof tightly connected via
In the loose part (3) of the roof part (2), the first steel reinforcing member (14A) is provided along one surface which is the face side of the wooden rafter (13A) at the outermost end. A reinforcing structure for a sloped roof, which is arranged and has a plurality of steel ladle arms (31) projecting from the first steel reinforcement (14A) in the direction of the beam. In the loose portion (3) of the roof portion (2), a second steel reinforcing material is provided along the other surface which is the surface opposite to the one surface of the wooden rafter (13A) at the outermost end. (14B) and a third steel reinforcing member (14C) disposed along one side surface of the wooden rafter (13B) adjacent to the wooden rafter (13A) at the outermost end, and facing each other. A plurality of steel retentive materials (30) are passed in a gradient direction between the steel reinforcer (14B) and the third steel reinforcer (14C), and these steel retentive materials are provided. The reinforcing structure for a sloped roof according to claim 1, wherein a plurality of steel ladle arms (31) are projected from the first steel reinforcing member (14A) along an extension line of (30).   The steel reinforcing material (14), the steel retaining material (30), and the steel ladle arm (31) are arranged so as to be within the height dimension of the wooden rafter (13). Reinforced structure of sloped roof. The steel verge bracket (31), sheathing (16) and Nokiuraban (17) according to any one of claims 1 to 3 fitted with wooden verge rafter (32) for securing the Reinforced structure of sloped roof.