Skip floor structure and building

Abstract

To obtain a skip floor structure and a building capable of assembling a steel building body skeleton and a wooden skip floor skeleton.SOLUTION: In a building 10, a part of a steel building body skeleton 122 is configured by a floor girder 32, a floor girder 66, a connection beam and a ceiling girder 60. In addition, a skip floor 124 comprises a wooden skip floor frame 128 supporting a floor material 146 and the skip floor frame 128 is supported to the connection beam via a wooden support part 154.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a skip floor structure and a building.

Background Art

[0002] Patent Document 1 below discloses an invention related to a skip floor type building. In this skip floor type building, the building frame is composed of a steel frame, and a partial beam extending horizontally from a column constituting a part of the frame and a suspension beam extending in the building height direction from a ceiling girder constituting a part of the frame form the frame portion of the skip floor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, depending on the specifications and construction methods of the building, it may be considered to configure the skip floor frame with wood. However, as described above, Patent Document 1 does not disclose a configuration in which a wooden skip floor frame is combined with a steel building main body frame.

[0005] In consideration of the above facts, an object of the present invention is to obtain a skip floor structure and a building that can combine a steel building main body frame and a wooden skip floor frame.

Means for Solving the Problems

[0006] The skip floor structure according to the first aspect supports an end portion on one side in the first direction of the first floor portion on the lower floor side of the building, extends in a second direction orthogonal to the first direction when viewed in the building height direction, and constitutes a part of the steel building main body frame. It includes a first floor girder, a second floor girder that is arranged at an interval on one side in the first direction with respect to the first floor girder and extends in the second direction and constitutes a part of the building main body frame, a plurality of connecting beams that connect the first floor girder and the second floor girder in the first direction and constitute a part of the building main body frame, an upper floor support girder that is arranged so as to overlap with one of them when viewed in the building height direction on the upper side in the building height direction of at least one of the first floor girder and the second floor girder, extends in the second direction, supports an end portion on the connecting beam side of the second floor portion on the upper floor side of the building, and constitutes a part of the building main body frame, a wooden skip floor frame that supports a floor material constituting the floor surface of the skip floor located on the upper side in the building height direction of the first floor portion and on the lower side in the building height direction of the second floor portion, and a wooden support portion that supports the skip floor frame with respect to the connecting beam.

[0007] In the skip floor structure according to the first aspect, a first floor girder is provided, and the first floor girder supports an end portion on one side in the first direction of the first floor portion on the lower floor side of the building. And the first floor girder extends in a second direction orthogonal to the first direction.

[0008] Also, in this aspect, a second floor girder is provided. This second floor girder is arranged at an interval on one side in the first direction with respect to the first floor girder and extends in the second direction. And the first floor girder and the second floor girder are connected in the first direction by a plurality of connecting beams.

[0009] On the other hand, on the upper side in the building height direction of at least one of the first floor girder and the second floor girder, an upper floor support girder extending in the second direction is arranged so as to overlap with one of them when viewed in the building height direction. And an end portion on the connecting beam side of the second floor portion on the upper floor side of the building is supported by the upper floor support girder. Thus, in this aspect, a part of the steel building main body frame is constituted by the first floor girder, the second floor girder, the connecting beam, and the upper floor support girder.

[0010] Here, in this aspect, a skip floor is located above the building height direction of the first floor part and below the building height direction of the second floor part. This skip floor is composed of a floor material constituting its floor surface and a wooden skip floor frame supporting the floor material. And the skip floor frame is supported by a connecting beam via a wooden support part. Thus, in this aspect, a wooden skip floor body is constituted by the skip floor frame and the support part.

[0011] The skip floor structure according to the second aspect is the skip floor structure according to the first aspect, wherein the skip floor frame is supported by the support part so that a part thereof is in a cantilever state.

[0012] In the skip floor structure according to the second aspect, since the skip floor frame is supported by the support part so that a part thereof is in a cantilever state, it is possible to secure a wide space below the building height direction of the cantilever-supported part of the skip floor frame.

[0013] The skip floor structure according to the third aspect is the skip floor structure according to the first aspect or the second aspect, wherein the support part includes a wooden first shear wall frame constituting a body of a first shear wall provided with a first wall part arranged along the first direction at a corner of the skip floor frame when viewed from the building height direction and a second wall part arranged along the second direction, and a wooden second shear wall frame constituting a body of a second shear wall provided with a third wall part arranged along the first direction at an interval from the first wall part in the second direction when viewed from the building height direction and a fourth wall part extending along the second direction from a peripheral edge portion on the side opposite to the second wall part in the third wall part toward the first wall part side.

[0014] In the skip floor structure according to the third aspect, the support portion includes a first shear wall frame and a second shear wall frame. The first shear wall frame is made of wood and constitutes the body of the first shear wall. The first shear wall includes a first wall portion arranged along the first direction and a second wall portion arranged along the second direction at a corner of the skip floor frame.

[0015] On the other hand, the second shear wall frame is made of wood and constitutes the body of the second shear wall. The second shear wall includes a third wall portion arranged along the first direction at a distance from the first wall portion in the second direction when viewed from the building height direction, and a fourth wall portion extending along the second direction from the peripheral edge portion on the side opposite to the second wall portion of the third wall portion toward the first wall portion side.

[0016] Therefore, in this aspect, the first shear wall and the second shear wall can support the skip floor while partitioning the outer periphery of the space below the skip floor in the building height direction.

[0017] The skip floor structure according to the fourth aspect is the skip floor structure according to any one of the first to third aspects, wherein the building main body structure includes a first unit frame including the first floor girder, and a second unit frame arranged at a distance from the first unit frame on one side in the first direction and including the second floor girder and a ceiling girder as the upper floor support girder, and further includes a first staircase portion connecting the first floor portion and the skip floor, and a second staircase portion connecting the skip floor and the second floor portion.

[0018] In the skip floor structure according to the fourth aspect, the building main body structure includes a first unit frame including the first floor girder and a second unit frame including the second floor girder and the ceiling girder. Therefore, in this aspect, a living space can be secured inside each of the first unit frame and the second unit frame.

[0019] Further, the second unit frame is disposed at a distance on one side in the first direction with respect to the first unit frame, and is connected to the first unit frame via a connecting beam. And a skip floor is disposed above the connecting beam in the building height direction, and the skip floor is connected by the first floor portion and the first staircase portion on the lower floor side of the building, and is connected by the second floor portion and the second staircase portion on the upper floor side of the building.

[0020] Therefore, in this aspect, in the building, the space on the lower floor side, the space on the skip floor, and the space on the upper floor side can be utilized as a continuous space.

[0021] The skip floor structure according to the fifth aspect is the skip floor structure according to any one of the first to fourth aspects, and a support beam that connects the connecting beams to each other and supports the support portion is disposed at a position overlapping the support portion when viewed from the building height direction between the connecting beams adjacent in the second direction.

[0022] In the skip floor structure according to the fifth aspect, a support beam is disposed at a position overlapping the support portion that supports the skip floor frame when viewed from the building height direction between the connecting beams adjacent in the second direction. This support beam connects the connecting beams adjacent in the second direction and supports the support portion. Therefore, in this aspect, the skip floor frame can be supported in a stable state.

[0023] The building according to the sixth aspect is applied with the skip floor structure according to any one of the first to fifth aspects, and includes a lower floor portion including a ceiling portion provided below the upper floor support girder in the building height direction and the first floor portion, and an upper floor portion including the second floor portion, and the skip floor is disposed between the ceiling portion and the first floor portion in the building height direction.

[0024] In the building according to the sixth aspect, the lower floor part includes a ceiling part provided below the upper floor support girder that supports the second floor part in the height direction and the first floor part. On the other hand, the upper floor part of the building includes the second floor part. And the skip floor is arranged between the ceiling part of the lower floor part and the first floor part in the building height direction. Therefore, in this aspect, the height of the floor surface in the building can be changed step by step from the lower floor part to the upper floor part of the building.

[0025] The building according to the seventh aspect is the building according to the sixth aspect, in which the space above the skip floor in the building height direction and the space of the upper floor part are a continuous through space.

[0026] In the building according to the seventh aspect, the space above the skip floor in the building height direction and the space of the upper floor part of the building are a continuous through space, and it is possible to secure the ceiling height above the skip floor in the building height direction.

[0027] The building according to the eighth aspect includes a first building unit having a steel first body frame, a second building unit having a steel second body frame and arranged at an interval from the first building unit in a first direction, a connecting floor part connecting the first floor part of the first building unit and the second floor part of the second building unit in the first direction, a skip floor having a wooden skip floor frame located below the first ceiling girder constituting a part of the first body frame and the second ceiling girder constituting a part of the second body frame and supported by the connecting floor part via a wooden support part, the inside of the first building unit being a first living space, the inside of the second building unit being a second living space, the space below the skip floor in the building height direction being a skip floor lower space that can communicate with at least one of the first living space and the second living space, and the space above at least one of the first building unit and the second building unit in the building height direction and the space above the skip floor in the building height direction being a continuous through space that can communicate with at least one of the first living space and the second living space.

[0028] In the building according to the eighth aspect, the building main body body is composed of the steel first body frame of the first building unit and the steel second body frame of the second building unit. Further, the first building unit and the second building unit are arranged at intervals in the first direction, and the first floor part of the first building unit and the second floor part of the second building unit are connected by a connecting floor part.

[0029] And a wooden skip floor frame is supported on the connecting floor part via a wooden support part. In this way, in this aspect, a wooden skip floor body is constituted by the skip floor frame and the support part.

[0030] In this aspect, the inside of the first building unit is the first living space, and the inside of the second building unit is the second living space. Further, the above-described skip floor frame is located below the first ceiling girder constituting a part of the first body frame and the second ceiling girder constituting a part of the second body frame in the building height direction, and this skip floor frame is located between the first ceiling girder, the second ceiling girder, and the connecting floor part in the building height direction.

[0031] And the lower side in the building height direction of the skip floor is a skip floor lower space that can communicate with at least one of the first living space and the second living space, and the skip floor lower space can be utilized as a storage space or a living space.

[0032] In this aspect, the space above at least one of the first building unit and the second building unit in the building height direction and the space above the skip floor in the building height direction are a through space that is continuously communicable with at least one of the first living space and the second living space. Therefore, in this aspect, the living space can be expanded in the building height direction above the skip floor in the building height direction.

Effect of the Invention

[0033] As described above, the skip floor structure according to the first aspect has an excellent effect that a steel building main body frame and a wooden skip floor frame can be combined.

[0034] The skip floor structure according to the second aspect has an excellent effect that the use of the space below the skip floor in the building height direction can be expanded.

[0035] The skip floor structure according to the third aspect has an excellent effect that while stably supporting the skip floor, it is possible to secure the space below the skip floor in the building height direction as compared with a configuration in which the center of the skip floor is supported by a column.

[0036] The skip floor structure according to the fourth aspect has an excellent effect that the degree of freedom in building planning can be improved in the building height direction.

[0037] The skip floor structure according to the fifth aspect has an excellent effect that the skip floor can be supported in a more stable state.

[0038] The building according to the sixth aspect has an excellent effect that while securing the floor area inside the building, the degree of freedom in building planning can be improved in the building height direction.

[0039] The building according to the seventh aspect has an excellent effect that a sense of openness can be created in the space inside the building.

[0040] The building according to the eighth aspect has an excellent effect that a steel building main body frame and a wooden skip floor frame can be combined and the degree of freedom in space utilization inside the building can be increased.

Brief Description of the Drawings

[0041]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0042] Hereinafter, with reference to FIGS. 1 to 7, an example of an embodiment of the skip floor structure according to the present invention will be described. As shown in FIG. 1, the "Building 10" to which the skip floor structure according to the present embodiment is applied is a unit building including a "Building Unit 14" as a first building unit installed on a foundation 12 and a "Building Unit 16" as a second building unit that is also installed on the foundation 12 and is placed separately from the Building Unit 14 on one side in the first direction.

[0043] In this embodiment, the first direction is the longitudinal direction of the building 10, i.e., the direction of the bays, and the second direction orthogonal to the first direction when viewed from the building height direction is the lateral direction of the building 10, i.e., the direction between the beams. Also, in each figure, the first direction is indicated by the arrow X, the second direction is indicated by the arrow Y, and the building height direction is indicated by the arrow Z.

[0044] The building unit 14 includes a steel "frame body frame 18" as the first unit frame constituting its frame body. The frame body frame 18 is composed of columns 20 erected at the four corners, a ceiling frame 22 connecting the upper ends of the columns 20, and a floor frame 24 connecting the lower ends of the columns 20.

[0045] The ceiling frame 22 is composed of channel steels, and a pair of ceiling girders 26 extending in the second direction and a pair of ceiling girders 28 extending in the first direction and shorter than the ceiling girders 26 are arranged in a rectangular frame shape and connected by four joint portions 30 to form its outer frame. Note that a plurality of ceiling joists (not shown) are spanned between the ceiling girders 26 at a predetermined interval.

[0046] On the other hand, as shown in FIG. 2, the floor frame 24 basically has the same configuration as the ceiling frame 22. That is, the floor frame 24 includes a pair of "floor girders 32" extending in the second direction, a pair of floor girders 34 extending in the first direction and shorter than the floor girders 32, four joint portions 36 connecting them, and a plurality of floor joists 38 spanned between the floor girders 32. Note that the ceiling frame 22 and the floor frame 24 are arranged such that the ceiling girders 26 overlap with the floor girders 32 and the ceiling girders 28 overlap with the floor girders 34 when viewed from the building height direction.

[0047] Also, a ceiling base material 40 is attached to the lower side of the ceiling frame 22 in the building height direction, and a ceiling material 42 is attached to the ceiling base material 40 to form a ceiling portion 44.

[0048] On one side, a joist 46 is attached to the upper side of the floor frame 24 in the building height direction. By attaching a plurality of floor materials 48 to this joist 46, a "floor part 50" as the first floor part is formed. This floor part 50 is arranged so as to be accommodated within the floor frame 24 when viewed from the building height direction. The floor girder 32 on one side in the first direction functions as a first floor girder that supports the end on one side in the first direction of the floor part 50.

[0049] On the other hand, the building unit 16 includes a steel "frame body frame 52" as the second unit frame that constitutes its frame body. The frame body frame 52 is composed of columns 54 erected at the four corners, a ceiling frame 56 connecting the upper ends of the columns 54, and a floor frame 58 connecting the lower ends of the columns 54.

[0050] The ceiling frame 56 includes a pair of "ceiling girders 60" extending in the second direction, a pair of ceiling girders 62 extending in the first direction, four doorway parts 64, and ceiling joists (not shown) spanned between the ceiling girders 60, and has the same configuration as the ceiling frame 22.

[0051] On the other hand, the floor frame 58 includes a pair of "floor girders 66" extending in the second direction, a pair of floor girders 68 extending in the first direction, four doorway parts 70, and a plurality of floor joists 72 spanned between the floor girders 66, and has the same configuration as the floor frame 24. The ceiling frame 56 and the floor frame 58 are arranged such that the ceiling girders 60 overlap the floor girders 66 and the ceiling girders 62 overlap the floor girders 68 when viewed from the building height direction. Also, the floor girder 66 on the other side in the first direction is arranged at an interval on the one side in the first direction with respect to the floor girder 32 on the one side in the first direction, and this floor girder 66 functions as a second floor girder.

[0052] Also, a ceiling base material 74 is attached to the lower side of the ceiling frame 56 in the building height direction. By attaching ceiling materials 76 to this ceiling base material 74, a "ceiling part 78" is formed.

[0053] On one side, a plurality of floor materials 80 are attached above the ceiling frame 56 in the building height direction, thereby forming a "floor portion 82" as the second floor portion. This floor portion 82 constitutes a part of a loft 84 that forms the upper floor side of the building 10. Further, the end portion on the other side in the first direction of the floor portion 82 is supported by a ceiling girder 60 on the other side in the first direction, and this ceiling girder 60 functions as an upper floor support girder.

[0054] Note that joists 46 are attached above the floor frame 58 in the building height direction, and a floor portion 83 is formed by attaching a plurality of floor materials 48 to these joists 46.

[0055] Also, in the present embodiment, the lower floor side of the building 10 is formed by the inside of the building unit 14, that is, the "living room 86" as the first living space, and the inside of the building unit 16, that is, the "living room 88" as the second living space.

[0056] And, in the present embodiment, the lower part in the building height direction of the building unit 14 and the lower part in the building height direction of the building unit 16 are connected by a connecting portion 90. As also shown in FIGS. 2 and 6, this connecting portion 90 includes a "connecting floor girder 92" as a connecting beam, a "connecting small beam 94" as a connecting beam, a "connecting support small beam 96" as a connecting beam, a "connecting support small beam 98" as a support beam, and a "connecting floor portion 100".

[0057] The connecting floor girders 92 are arranged in a pair, and each connects the joint portion 36 of the floor frame 24 and the joint portion 70 of the floor frame 58 that are continuous in the first direction in the first direction. This connecting floor girder 92 is composed of a channel steel and is arranged with its web portion on the outdoor side. Further, joists (not shown) are arranged on the upper surface of the connecting floor girder 92, and these joists are used for supporting the connecting floor portion 100.

[0058] The connecting cross-beams 94 extend in the first direction and are arranged in a plurality at a predetermined interval in the second direction, connecting the floor girder 32 on one side in the first direction and the floor girder 66 on the other side in the first direction in the first direction. The connecting cross-beams 94 are composed of steel pipes with a rectangular closed cross-section when viewed from the first direction, and joists 102 are arranged on their upper surfaces, and the joists 102 are used to support the connected floor part 100.

[0059] The connecting support cross-beams 96 extend in the first direction and are arranged in a pair at intervals in the second direction, each connecting the floor girder 32 on one side in the first direction and the floor girder 66 on the other side in the first direction in the first direction. The connecting support cross-beams 96 are composed of channel steel, and in a state where their web parts face the outdoor side, they are arranged so as to overlap a part of the "support part 154" described later when viewed from the building height direction. Also, joists 104 are arranged on the upper surfaces of the connecting support cross-beams 96, and the joists 104 are used to support the connected floor part 100.

[0060] The connecting support cross-beams 98 extend in the second direction and are arranged in two sets as a group of two. One set is arranged near the part on the second direction one side of the floor girder 32 on one side in the first direction, and the other set is arranged near the part on the second direction other side of the floor girder 66 on the other side in the first direction. Note that the connecting support cross-beams 98 are arranged so as to overlap a part of the support part 154 described later when viewed from the building height direction.

[0061] Taking the connecting support cross-beam 98 arranged on the floor girder 66 side as an example for explanation, the connecting support cross-beam 98 is composed of channel steel and is arranged with its web part 98A facing the floor girder 66 side. And both ends of the connecting support cross-beam 98 on the one side in the second direction are fastened to the gusset plates 106 provided on the connecting cross-beams 94 with fastening members 108 respectively.

[0062] On one side, the end of the connecting support cross beam 98 on the one side in the second direction is fastened to the gusset plate 106 provided on the connecting cross beam 94 by a fastening member 108, and the end of the connecting support cross beam 98 on the other side in the second direction is fastened to the gusset plate 110 provided on the connecting support cross beam 96 by a fastening member 108.

[0063] Also, the central portion in the longitudinal direction of the connecting support cross beam 98 is reinforced by a pair of rib plates 112 arranged at intervals in the second direction. And in the flange portion 98B on the upper side in the building height direction of the connecting support cross beam 98, an insertion hole portion 114 is provided in a portion located between the rib plates 112 when viewed from the building height direction.

[0064] Furthermore, a joist 116 is arranged on the upper surface of the flange portion 98B, and the joist 116 is used for supporting the connecting floor portion 100. Also, an insertion hole portion 118 larger than the insertion hole portion 114 is provided in the joist 116 at a position overlapping the insertion hole portion 114 when viewed from the building height direction.

[0065] Returning to FIG. 1, the connecting floor portion 100 is configured by attaching a plurality of floor materials 120 to the joists 102, 104, the joist 116, etc., and the connecting floor portion 100 connects the floor portion 50 and the floor portion 82 in the first direction.

[0066] And in this embodiment, including the above - configured frame 18 of the building body, the frame 52 of the building body, the connecting floor girder 92, the connecting cross beam 94, the connecting support cross beam 96, and the connecting support cross beam 98, a "building main body frame 122" that constitutes the skeleton of the building 10 is configured. That is, most of the building main body frame 122 is composed of steel materials.

[0067] On one side, above the building height direction of the connecting part 90, a "skip floor 124" is arranged. As shown in FIGS. 2 to 5, the skip floor 124 has a concave hexagonal shape in which a part on one side in the second direction and the other side in the first direction of a rectangle with the second direction as the longitudinal direction when viewed from the building height direction is recessed in a rectangular shape. Hereinafter, the recessed rectangular part in the skip floor 124 will be conveniently referred to as a recess 126.

[0068] This skip floor 124 is mainly composed of a "skip floor frame 128", and the skip floor frame 128 includes a ridge beam 130, a ridge beam 132, a ridge beam 134, a purlin beam 136, a purlin beam 138, a purlin beam 140, a plurality of purlin joists 142, a purlin joist 143, and a plurality of ridge joists 144, each made of wood.

[0069] Specifically, the ridge beam 130 extends in the second direction and forms the peripheral edge on one side in the first direction of the skip floor 124, and the ridge beam 132 extends in the second direction and forms the peripheral edge on the other side in the first direction of the skip floor 124. On the other hand, the ridge beam 134 extends in the second direction and is arranged in the middle between the ridge beam 130 and the ridge beam 132 in the first direction and forms the peripheral edge on one side in the first direction of the recess 126.

[0070] The purlin beam 136 extends in the first direction and forms the peripheral edge on the other side in the second direction of the skip floor 124, and the purlin beam 138 extends in the first direction and forms the peripheral edge on one side in the second direction of the skip floor 124. On the other hand, the purlin beam 140 extends in the first direction and is spanned between the ridge beam 130 and the ridge beam 132, and the part on the other side in the first direction thereof forms the peripheral edge on the other side in the second direction of the recess 126.

[0071] The purlin joist 142 extends in the first direction and is spanned between the ridge beam 130 and the ridge beam 132 between the purlin beam 136 and the purlin beam 140, and is arranged at a predetermined interval in the second direction. On the other hand, the purlin joist 143 extends in the first direction and is spanned between the ridge beam 130 and the ridge beam 134 between the purlin beam 138 and the purlin beam 140.

[0072] The purlin 144 extends in the second direction and is arranged in pairs of two at the central portion of the skip floor frame 128 in the first direction between the girder 136 and the girder 140, with a space therebetween in the first direction, and connects the girders adjacent to each other in the second direction. Note that a plurality of purlins 144 arranged in series in the second direction are arranged such that most of them overlap when viewed from the second direction. On the other hand, the purlin 144 is arranged in the vicinity of the girder 134 between the girder 138 and the girder 140, and connects the girders adjacent to each other in the second direction.

[0073] The skip floor frame 128 configured as described above is arranged so as to fit into the connecting portion 90 when viewed from the building height direction, in other words, is arranged so as to fit between the building unit 14 and the building unit 16. Note that in the first direction, a predetermined space is provided between the girder 136 and the columns 20 and 54, and the girder 138 is close to the column 54.

[0074] Also, a plurality of "floor materials 146" that constitute the floor surface of the skip floor 124 are attached above the skip floor frame 128 in the building height direction.

[0075] On the other hand, a ceiling base material 148 is attached below the skip floor frame 128 in the building height direction, and the skip floor lower ceiling portion 152 is configured by attaching a ceiling material 150 to the ceiling base material 148.

[0076] And the skip floor 124 configured as described above is supported by the connecting floor portion 100 via the support portion 154. This support portion 154 is configured to include corner columns 156, 157, the "shear wall 158" as the first shear wall, and the "shear wall 160" as the second shear wall.

[0077] The corner column 156 is made of wood and stands upright in the building height direction, supporting the vicinity of the connecting part between the girder 130 and the joist beam 140 in the skip floor frame 128. On the other hand, the corner column 15 is made of wood and stands upright in the building height direction, supporting the vicinity of the corner on the other side in the second direction and the other side in the first direction in the skip floor frame 128.

[0078] The shear wall 158 includes a "shear wall frame 162" as a first shear wall frame made of wood that constitutes the body of the shear wall 158, and a pair of structural plywoods 164.

[0079] The shear wall frame 162 is composed of a base 166, a base 168, and a plurality of structural columns 170. Specifically, the base 166 is arranged on the upper surface of the connecting floor part 100 so as to overlap with the part on one side in the second direction of the girder 132 when viewed in the building height direction. And the base 166 is fastened to the connecting support small beam 98 located on the lower side in the building height direction, similar to the base 180 described later.

[0080] On the other hand, the base 168 extends from the end on one side in the second direction of the base 166 to one side in the first direction, and is arranged on the upper surface of the connecting floor part 100 so as to overlap with the part on the other side in the first direction of the joist beam 140 when viewed in the building height direction. And the base 168 is fastened to the connecting support small beam 96 located on the lower side in the building height direction of the base 168.

[0081] The structural columns 170 are erected in the building height direction at least at both ends of the base 166 and the end on one side in the first direction of the base 168, and their upper ends are connected to the skip floor frame 128. That is, it can be considered that a part of the body of the shear wall 158 is constituted by a part of the skip floor frame 128.

[0082] The structural plywood 164 is attached to the foundation 166 and the structural column 170 attached to the foundation 166 from one side in the first direction with the plate thickness direction being the first direction, and is attached to the foundation 168 and the structural column 170 attached to the foundation 168 from the other side in the second direction with the plate thickness direction being the second direction.

[0083] That is, the shear wall 158 includes a "wall portion 158A" as a first wall portion arranged along the first direction and a "wall portion 158B" as a second wall portion arranged along the second direction at the corner of the skip floor frame 128.

[0084] On the other hand, the shear wall 160 includes a "shear wall frame 176" as a second shear wall frame made of wood and constituting the body of the shear wall 160, and a pair of structural plywoods 178.

[0085] The shear wall frame 176 includes a foundation 180, a foundation 182, and a plurality of structural columns 184. Specifically, the foundation 180 is arranged so as to overlap a portion on the other side in the second direction of the girder 130 when viewed from the building height direction on the upper surface of the connecting floor portion 100. And the foundation 180 is fastened to the connecting support small beam 98 located on the lower side in the building height direction of the foundation 180 by a fastening member 174 inserted through an insertion hole portion 172 provided in the foundation 180, an insertion hole portion 114 provided in the connecting support small beam 98, and an insertion hole portion 118 provided in the joist 116 (see FIG. 6).

[0086] On the other hand, the foundation 182 extends from the end on the other side in the second direction of the foundation 180 to the other side in the first direction, and is arranged so as to overlap a portion on the one side in the first direction of the purlin beam 136 when viewed from the building height direction on the upper surface of the connecting floor portion 100. And the foundation 182 is fastened to the connecting support small beam 96 located on the lower side in the building height direction of the foundation 182 by a fastening member (not shown).

[0087] The structural column 184 is erected in the building height direction at least at both ends of the base 180 and at the end on the other side in the first direction of the base 182, and its upper end is connected to the skip floor frame 128. That is, it can be considered that a part of the structure of the shear wall 160 is constituted by a part of the skip floor frame 128.

[0088] The structural plywood 178 is attached to the base 180 and the structural column 184 attached to the base 180 from the other side in the first direction with the plate thickness direction being the first direction, and is attached to the base 182 and the structural column 184 attached to the base 182 from one side in the second direction with the plate thickness direction being the second direction.

[0089] That is, the shear wall 160 includes, at the corner of the skip floor frame 128, a "wall portion 160A" as a third wall portion arranged along the first direction with a space in the second direction when viewed from the building height direction from the wall portion 158A, and a "wall portion 160B" as a fourth wall portion extending along the second direction from the peripheral portion on the side opposite to the wall portion 158B in the wall portion 160A toward the wall portion 158A side.

[0090] And in this embodiment, a skip floor body 186 that constitutes the framework of the skip floor 124 is constituted including the skip floor frame 128, the shear wall frame 162, and the shear wall frame 176 configured as described above. That is, most of the skip floor body 186 is constituted of wood.

[0091] Also, in this embodiment, since the skip floor 124 is supported by the support portion 154 as described above, the portion adjacent to the recess 126 in the skip floor 124 in the first direction is in a state of being cantilever-supported.

[0092] In addition, in the present embodiment, the skip floor 124 is disposed below the ceiling portions 44 and 78 in the building height direction and above the floor portions 50 and 82 in the building height direction, and a "void space 188" is formed in which the space above the skip floor 124 in the building height direction is continuous with the loft 84.

[0093] On the other hand, the space below the skip floor 124 in the building height direction is a "storage space 190" as a space under the skip floor, and the storage space 190 communicates with the living rooms 86 and 88. Note that by moving the position of the skip floor 124 upward in the building height direction, it is also possible to utilize the space below the skip floor 124 in the building height direction as a living space.

[0094] In addition, inside the recess 126 of the skip floor 124, a "staircase 192" is provided as a first staircase connecting the floor portion 50 and the skip floor 124, and above the skip floor 124 in the building height direction, a "staircase 194" is provided as a second staircase connecting the skip floor 124 and the floor portion 82 of the loft 84.

[0095] <Actions and Effects of the Present Embodiment> Next, the actions and effects of the present embodiment will be described.

[0096] In the present embodiment, as shown in FIG. 1, a floor girder 32 is provided on one side in the first direction, and the floor girder 32 supports an end portion on one side in the first direction of the floor portion 50 on the lower floor side of the building 10. The floor girder 32 extends in a second direction orthogonal to the first direction.

[0097] In addition, in the present embodiment, a floor girder 66 is provided on the other side in the first direction. The floor girder 66 is disposed at an interval on one side in the first direction with respect to the floor girder 32 and extends in the second direction. The floor girder 32 and the floor girder 66 are connected in the first direction by connecting beams, that is, connecting floor girders 92, connecting small beams 94, and connecting support small beams 96.

[0098] On one side, above the upper side of the floor girder 66 in the building height direction, a ceiling girder 60 on the other side in the first direction extending in the second direction is arranged so as to overlap the floor girder 66 when viewed from the building height direction. And, the end portion on the side of the connecting beam of the floor portion 82 on the upper floor side of the building 10 is supported by this ceiling girder 60. Thus, in the present embodiment, a part of the steel building main body frame 122 is constituted by the floor girder 32, the floor girder 66, the connecting beam, and the ceiling girder 60.

[0099] Here, in the present embodiment, a skip floor 124 is located above the floor portion 50 in the building height direction and below the floor portion 82 in the building height direction. This skip floor 124 is configured to include a floor material 146 constituting its floor surface and a wooden skip floor frame 128 supporting the floor material 146. And, the skip floor frame 128 is supported by the connecting beam via a wooden support portion 154. Thus, in the present embodiment, a wooden skip floor frame 186 is constituted by the skip floor frame 128 and the support portion 154.

[0100] Therefore, in the present embodiment, the steel building main body frame 122 and the wooden skip floor frame 186 can be combined.

[0101] Further, in the present embodiment, since a part of the skip floor frame 128 is supported by the support portion 154 so as to be in a cantilever state, a wide space can be secured below the cantilever-supported portion of the skip floor frame 128 in the building height direction. Therefore, in the present embodiment, the use of the space below the skip floor 124 in the building height direction can be expanded.

[0102] In addition, in the present embodiment, as shown in FIGS. 2 and 5, the support portion 154 includes a shear wall frame 162 and a shear wall frame 176. The shear wall frame 162 is made of wood and constitutes the body of the shear wall 158. And the shear wall 158 includes a wall portion 158A arranged along the first direction and a wall portion 158B arranged along the second direction at the corner of the skip floor frame 128.

[0103] On the other hand, the shear wall frame 176 is made of wood and constitutes the body of the shear wall 160. And the shear wall 160 includes a wall portion 160A arranged along the first direction at an interval from the wall portion 158A when viewed from the building height direction, and a wall portion 160B extending along the second direction from the peripheral edge portion of the wall portion 160A on the side opposite to the wall portion 158B toward the wall portion 158A side.

[0104] Therefore, in the present embodiment, the shear walls 158 and 160 can support the skip floor 124 while partitioning the outer periphery of the space below the skip floor 124 in the building height direction. Accordingly, in the present embodiment, it is possible to secure the space below the skip floor 124 in the building height direction as compared with a configuration in which the center of the skip floor 124 is supported by a column while stably supporting the skip floor 124.

[0105] Returning to FIG. 1, in the present embodiment, the building main body frame 122 includes a frame 18 including a floor girder 32 and a frame 52 including a floor girder 66 and a ceiling girder 60. Therefore, in the present embodiment, a living space can be secured inside each of the frame 18 and the frame 52.

[0106] Further, the body frame 52 is arranged at a distance from the body frame 18 on one side in the first direction and is connected to the body frame 18 via the connecting beam. And a skip floor 124 is arranged above the connecting beam in the building height direction. The skip floor 124 is connected to the floor portion 50 on the lower floor side of the building 10 by the staircase 192 and is connected to the floor portion 82 on the upper floor side of the building 10 by the staircase 194.

[0107] Therefore, in this embodiment, within the building 10, the space on the lower floor side, the space on the skip floor 124, and the space on the upper floor side can be utilized as a continuous space. Thus, in this embodiment, in the building height direction, the degree of freedom in building planning can be improved.

[0108] Also, in this embodiment, as shown in FIGS. 2 and 6, a connecting support small beam 98 is arranged at a position overlapping with a support portion 154 that supports the skip floor frame 128 between the connecting small beams 94 adjacent in the second direction and between the connecting small beam 94 and the connecting support small beam 96. This connecting support small beam 98 connects the connecting small beams 94 adjacent in the second direction to each other and the connecting small beam 94 and the connecting support small beam 96 and supports the support portion 154.

[0109] Therefore, in this embodiment, the skip floor frame 128 can be supported in a stable state, and as a result, the skip floor 124 can be supported in a more stable state.

[0110] Returning to FIG. 1, in this embodiment, the lower floor portion of the building 10 includes a ceiling portion 78 provided below the ceiling large beam 60 that supports the floor portion 82 and the floor portion 50. On the other hand, the upper floor portion of the building 10 includes the floor portion 82. And the skip floor 124 is arranged between the ceiling portion 78 and the floor portion 50 of the lower floor portion in the building height direction.

[0111] Therefore, in this embodiment, the height of the floor surface in the building 10 can be changed step by step from the lower floor to the upper floor of the building 10. Accordingly, in this embodiment, while ensuring the floor area in the building 10, the degree of freedom in the planning of the building 10 can be improved in the building height direction.

[0112] In addition, in this embodiment, the space above the skip floor 124 in the building height direction and the space of the upper floor of the building 10 are continuous through spaces 188, and the ceiling height can be ensured above the skip floor 124 in the building height direction. In other words, above the skip floor 124 in the building height direction, the living space can be expanded in the building height direction. Therefore, in this embodiment, a sense of openness can be created in the space within the building 10.

[0113] In addition, in this embodiment, the lower side of the skip floor 124 in the building height direction is a space that can communicate with the living rooms 86 and 88, and this space can be utilized as a storage space or a living space, and as a result, the degree of freedom in the use of the space within the building 10 can be increased.

[0114] <Supplementary Explanation of the Above Embodiment> (1) In the above-described embodiment, the support portion 154 was disposed on the lower side of the skip floor 124 in the building height direction, but the arrangement on the lower side of the skip floor 124 in the building height direction is not limited to this. For example, as shown in the modification of FIG. 7, a plurality of partition walls 196 may be disposed on the lower side of the skip floor 124 in the building height direction. Also, the positions of the shear walls 158 and 160 may be changed within a range where there is no bias in the arrangement positions in the first direction and the second direction. According to such a configuration, the degree of freedom in the use of the space on the lower side of the skip floor 124 in the building height direction can be further increased.

[0115] (2) Also, in the above-described embodiment, the building units were arranged in a row in the first direction, but it is not limited to this. That is, the skip floor structure according to this embodiment can also be applied to a unit building in which the building units are arranged in a row in the building height direction according to the specifications of the building, etc. Similarly, the skip floor structure according to this embodiment can also be applied to a building constructed by a steel frame construction method.

Explanation of Signs

[0116] 10 Building 14 Building unit (first building unit) 16 Building unit (second building unit) 18 Body frame (first unit frame) 32 Floor girder (first floor girder) 50 Floor part (first floor part) 52 Body frame (second unit frame) 60 Ceiling girder (upper floor support girder) 66 Floor girder (second floor girder) 78 Ceiling part 82 Floor part (second floor part) 86 Living room (first living space) 88 Living room (second living space) 92 Connecting floor girder (connecting beam) 94 Connecting small beam (connecting beam) 96 Connecting support small beam (connecting beam) 98 Connecting support small beam (support beam) 100 Connecting floor part 122 Building main body 124 Skip floor 128 Skip floor frame 146 Floor material 154 Support part 158 Shear wall (first shear wall) 158A Wall part (first wall part) 158B Wall part (second wall part) 160 Shear wall (second shear wall) 160A Wall part (third wall part) 160B Wall part (fourth wall part) 162 Endurance wall frame (first endurance wall frame) 176 Endurance wall frame (second endurance wall frame) 188 Atrium space 190 Storage space (space under skip floor) 192 Stairs (first flight of stairs) 194 Stairs (second flight of stairs)

Claims

1. A first floor girder that supports an end portion on one side in a first direction of a first floor portion on the lower floor side of a building, extends in a second direction orthogonal to the first direction when viewed from the building height direction, and forms a part of a steel building main body frame; A second floor girder that is arranged at an interval on one side in the first direction with respect to the first floor girder and extends in the second direction, and forms a part of the building main body frame; A plurality of connecting beams that connect the first floor girder and the second floor girder in the first direction and form a part of the building main body frame; An upper floor support girder that is arranged so as to overlap with one of the first floor girder and the second floor girder on the upper side in the building height direction when viewed from the building height direction, extends in the second direction, supports an end portion on the connecting beam side of the second floor portion on the upper floor side of the building, and forms a part of the building main body frame; A wooden skip floor frame that supports a floor material constituting a floor surface of a skip floor located on the upper side in the building height direction of the first floor portion and on the lower side in the building height direction of the second floor portion; A wooden support portion that supports the skip floor frame with respect to the connecting beam; A skip floor structure having the above.

2. The skip floor frame is supported by the support portion so that a part thereof is in a cantilever state. The skip floor structure according to Claim 1.

3. The support portion includes: A wooden first shear wall frame that constitutes a body of a first shear wall including a first wall portion arranged along the first direction at a corner portion of the skip floor frame when viewed from the building height direction and a second wall portion arranged along the second direction; A wooden second shear wall frame that constitutes a body of a second shear wall including a third wall portion arranged along the first direction at an interval from the first wall portion in the second direction when viewed from the building height direction and a fourth wall portion extending along the second direction from a peripheral portion on the side opposite to the second wall portion in the third wall portion toward the first wall portion side; And includes the above. The skip floor structure according to Claim 1 or Claim 2.

4. The building main body frame includes: A first unit frame configured to include the first floor girder; A second unit frame that is arranged at an interval on one side in the first direction with respect to the first unit frame and is configured to include the second floor girder and a ceiling girder as the upper floor support girder; And includes the above, and A first staircase portion that connects the first floor portion and the skip floor; A second staircase connecting the skip floor and the second floor portion, further comprising, The skip floor structure according to any one of claims 1 to 3.

5. Support beams are arranged to connect the connecting beams adjacent to each other in the second direction and support the support portion at a position overlapping the support portion when viewed from the building height direction between the connecting beams. The skip floor structure according to any one of claims 1 to 4.

6. The skip floor structure according to any one of claims 1 to 5 is applied, A lower floor portion including a ceiling portion provided below the upper floor support girder in the building height direction and the first floor portion, and an upper floor portion including the second floor portion, The skip floor is arranged between the ceiling portion and the first floor portion in the building height direction. Building.

7. The space above the skip floor in the building height direction and the space of the upper floor portion are continuous through spaces. The building according to claim 6.

8. A first building unit including a steel first body frame, A second building unit including a steel second body frame and arranged at an interval from the first building unit in the first direction, A connecting floor portion connecting the first floor portion of the first building unit and the second floor portion of the second building unit in the first direction, A skip floor including a wooden skip floor frame supported by the connecting floor portion via a wooden support portion and located below the first ceiling girder constituting a part of the first body frame and the second ceiling girder constituting a part of the second body frame in the building height direction, comprising, The inside of the first building unit is a first living space, The inside of the second building unit is a second living space, The space below the skip floor in the building height direction is a skip floor lower space that can communicate with at least one of the first living space and the second living space, The space above at least one of the first building unit and the second building unit in the building height direction and the space above the skip floor in the building height direction are continuous through spaces that can communicate with at least one of the first living space and the second living space. Building.

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