JP7415475B2 - overhang floor structure - Google Patents

Description

The present invention relates to a projecting floor structure.

Patent Document 1 discloses a technology related to an overhang unit provided in a building unit. In this prior art, the overhang unit includes a U-shaped frame that has a U-shape in side view and is configured by a column and upper and lower beam sections extending in the same direction from the upper and lower ends of the column. , there is no need for a column located at the tip of the beam and forming a corner of the overhang unit. Thereby, in the prior art, a space with a sense of openness is obtained in the overhang portion formed by the overhang unit.

Japanese Patent Application Publication No. 2009-19409

However, in the above-mentioned prior art, the overhang unit has a so-called cantilever structure with beam sections extending from the upper and lower ends of the column, and when a heavy object is loaded on the overhang formed by the overhang unit, Stress caused by the heavy object is concentrated at the base of the beam.

For this reason, the overhang dimension and applied load are limited in the overhang part, and depending on the overhang dimension and applied load, the cross section of the member of the column of the U-shaped frame, the method of joining the beam materials, the building unit of the U-shaped frame, etc. It is necessary to change the connection points, etc. In other words, it is necessary to change the size of the U-shaped frame depending on the overhang dimension of the overhang and the applied load, which impairs the productivity of the overhang. Furthermore, it is not possible to adjust the hanging of the tip of the overhang during construction.

The present invention has been made in view of the above-mentioned facts, and aims to provide an overhanging floor structure in which the strength of the beam can be adjusted according to the overhang dimension and applied load while ensuring flexibility in design. .

The overhanging floor structure according to the first aspect includes studs that vertically bridge ceiling beams and floor beams that form part of the outer wall of a building and are arranged vertically opposite each other, and are fixed to the studs. One longitudinal end of the floor-side overhanging beam is fixed to the stud, and the other longitudinal end is fixed to the floor-side overhanging beam, and the tension is reduced. An overhanging portion is formed by forming a pair of overhanging support portions including an adjustable first adjustment support means.

In the overhanging floor structure according to the first aspect, the overhanging support portion including the stud, the floor side overhanging beam, and the first adjustment support means forms a pair to form the overhanging portion. Here, in this aspect, the studs vertically bridge the ceiling beams and floor beams, which each constitute a part of the outer wall of the building and are arranged vertically opposite to each other. On the other hand, the floor side overhanging beam is fixed to the studs and is extended to the outside. The tension of the first adjustment support means is adjustable, and one end in the longitudinal direction is fixed to the stud, and the other end in the longitudinal direction is fixed to the floor side overhang.

As described above, in this aspect, the first adjustment support means is fixed to the studs extending in the vertical direction and the floor side overhang beams extending from the studs to the outdoor side in the overhang portion. , a triangle is formed between the stud, the floor overhang and the first adjustment support means. That is, in the overhang, a truss structure is formed between the stud, the floor side overhang, and the first adjustment support means.

As a comparative example, for example, if the overhang part is not provided with the first adjustment support means, the floor side overhang beam will be in a cantilevered state, and the floor side overhang beam will have a base portion of the floor side overhang beam. A bending moment centered at will be applied.

On the other hand, in this aspect, as described above, in the overhanging part, the truss structure is configured between the stud, the floor side overhanging beam, and the first adjustment support means, so the floor side overhanging beam The bending moment generated in the truss structure can be converted into an axial force (tensile force, compressive force) acting on the studs, the floor side overhanging beam, and the first adjusting support means.

That is, in this aspect, it is possible to reduce the bending moment in the floor side overhang beam. The axial force is adjusted by adjusting the tension in the first adjustment support means, and the bending strength can be adjusted in the overhang portion according to the overhang dimension and applied load.

Further, in this aspect, in the overhang portion, one end portion in the longitudinal direction of the floor side overhang beam is fixed to a stud that spans the ceiling beam and the floor beam in the vertical direction. For example, compared to the case where the floor side overhang beam is fixed to the floor beam, in this aspect, the floor side overhang beam can be fixed at any position in the vertical direction of the stud. In other words, in this aspect, it is possible to improve the degree of freedom in design of the projecting portion.

Regarding "adjusting the tension," it is possible to adjust the tension by changing the fixing position of the first adjustment support means to the studs and the fixing position to the floor side overhang beam. It is also possible to adjust the tension by extending and contracting the first adjustment support means, in which the support means is made of an extensible member. When the first adjustment support means is expanded and contracted in this way, it is convenient because the tension can be finely adjusted while the first adjustment support means is fixed.

In the overhanging floor structure according to a second aspect, in the overhanging floor structure according to the first aspect, the overhanging support part is arranged to face the floor-side overhanging beam upwardly in the vertical direction. , a ceiling-side overhang beam fixed to the upper side of the stud and extending outdoors; and a ceiling-side overhang beam fixed to the stud at one end in the longitudinal direction and extending longitudinally to the ceiling-side overhang beam. It further includes second adjustment support means having the other end fixed and whose tension can be adjusted.

In the overhanging floor structure according to the second aspect, in the overhanging portion, the overhanging support portion further includes a ceiling side overhanging beam and a second adjustment support means. In this aspect, the ceiling-side overhang beam is arranged to face the floor-side overhang beam above and below in the vertical direction, and is fixed to the stud and extends outdoors. The tension of the second adjustment support means can be adjusted by, for example, changing the fixing position to the stud, the fixing position to the ceiling side overhang, or both, and one end in the longitudinal direction can be adjusted. It is fixed to the stud, and the other end in the longitudinal direction is fixed to the ceiling side overhang beam.

As described above, in this aspect, the second adjustment support means is fixed to the studs extending in the vertical direction and the ceiling side overhang beams extending from the studs to the outdoor side in the overhang portion. , a triangle is formed between the stud, the ceiling side overhang, and the second adjustment support means. That is, in the overhang, a truss structure is formed between the stud, the ceiling side overhang, and the second adjustment support means.

As a result, in this aspect, in the overhang portion, the bending moment that occurs in the ceiling side overhang beam can be converted into an axial force acting on the studs, the ceiling side overhang beam, and the second adjustment support means by the truss structure. , it is possible to reduce the bending moment in the ceiling side overhang beam. Then, in the second adjustment support means, the axial force is adjusted by adjusting the tension by changing the fixing position to the stud, the fixing position to the ceiling side overhang, or both, and in the overhang part, The bending strength can be adjusted according to the overhang size and applied load.

In particular, in this aspect, in addition to the truss structure configured between the stud, the floor-side overhang beam, and the first adjustment support means, the overhang portion includes the stud, the ceiling-side overhang beam, and the second adjustment support means. A truss structure is constructed between the two. Therefore, in the overhang, among the loads acting on the studs due to the tension exerted by the first adjustment support means, the load on the roof and ceiling portions of the overhang can be dispersed by the second adjustment support means. As a result, it becomes possible to reduce the bending moment acting on the studs.

The overhanging floor structure according to the third aspect is the overhanging floor structure according to the first aspect or the second aspect, in which the building includes a plurality of building units, and a pair of overhanging units forming the overhang part are provided. Among the overhanging support parts, one of the overhanging support parts is provided in one of the building units arranged next to each other, and the other overhang support part is provided in one of the building units arranged next to each other. It is installed in the other building unit.

In the overhanging floor structure according to the third aspect, the building is composed of a plurality of building units, and one of the pair of overhanging support parts forming the overhang part is adjacent to the other overhanging support part. It is provided in one of the arranged building units. Moreover, the other overhang support part is provided in the other building unit among the building units arranged adjacently. In other words, the overhang can be provided across two building units that are arranged next to each other, making it possible to further improve the degree of freedom in design.

Note that "arranged next to each other" herein includes cases in which the overhang parts are arranged above and below the building, in addition to the case where the overhang parts are arranged on the left and right sides of the building.

As explained above, the overhanging floor structure according to the present embodiment has the excellent effect that the proof stress can be adjusted according to the overhang dimension and the applied load.

FIG. 1 is a perspective view of a building including an overhang to which the overhang floor structure according to the present embodiment is applied. FIG. 3 is a side view showing a skeleton of an overhang to which the overhang floor structure according to the present embodiment is applied. FIG. 3 is a side view corresponding to FIG. 2 as a comparative example. FIG. 6 is a sectional view corresponding to FIG. 5 showing a state before renovation. It is a sectional view showing a state after renovation showing an example of an overhang part to which the overhang floor structure according to the present embodiment is applied. (A) is a plan view corresponding to FIG. 1, and (B) is a plan view showing a first modification of the overhang portion to which the overhang floor structure according to the present embodiment is applied. (A) is a plan view showing modification example 2 of the overhang part to which the overhang floor structure according to the present embodiment is applied, and (B) is a plan view to which the overhang floor structure according to the present embodiment is applied. It is a side view of a building showing modification example 3 of the overhanging part.

Embodiments of the present invention will be described in detail below with reference to the drawings.
(Configuration of overhanging floor structure)

First, the configuration of the overhang to which the overhang floor structure according to the present embodiment is applied will be described.
FIG. 1 shows a perspective view of a unit-type building 14 including an overhang 12 to which an overhang floor structure 10 according to the present embodiment is applied.

As shown in FIG. 1, this building 14 is a two-story building formed by arranging a plurality of building units 16 vertically and horizontally, each of which is constructed of a rigid frame structure framed by a steel frame. The building includes a floor (first floor) 18 and an upper floor (second floor) 20. Further, in the building 14, the building body 22 is surrounded by an outer wall portion 24, and the roof portion 26 is a flat roof. Note that the building 14 is not limited to a frame having a steel frame rigid frame structure, but may be configured, for example, to a frame having a steel frame frame structure. Further, the roof portion 26 is not limited to a flat roof, but may be a sloped roof or the like.

Although not shown, the building unit 16 includes four pillars erected at the four corners, a rectangular ceiling frame connected to the upper ends of the pillars, and a rectangular ceiling frame connected to the lower ends of the pillars. It consists of a frame-shaped floor frame.

The ceiling frame is composed of long-side ceiling beams and short-side ceiling beams that are arranged to face each other. There are multiple ceiling beams.

In addition, like the ceiling frame, the floor frame is configured to include a floor beam on the long side and a floor beam on the short side, which are arranged opposite to each other, and between the floor beams on the long side, A plurality of floor beams are provided at predetermined intervals.

Here, in this embodiment, the overhang part 12 is provided on the upper floor 20 of the building 14. The overhang part 12 overhangs from the outer wall surface 24A of the outer wall part 24 of the building body 22 toward the outdoor 30 side, and has a cantilevered shape.

FIG. 2 shows a side view showing the skeleton of the projecting portion 12. As shown in FIG. As shown in FIGS. 1 and 2, in this embodiment, the overhang portion 12 includes a pair of overhang support portions 32, and the overhang support portion 32 is connected to the studs 34 and the floor. It includes a side overhang beam 36, a turnbuckle with battledores on both sides (first adjustment support means) 38, a ceiling side overhang beam 60, and a channel steel (second adjustment support means) 62. Note that although channel steel is used here as the second adjustment support means, it is not necessarily limited to channel steel, as any member can be used as long as it can withstand compressive force.

The studs 34 vertically connect a ceiling beam (ceiling beam) 42 that constitutes a part of the ceiling frame 40 of the building unit 16 and a floor beam (floor beam) 46 that constitutes a part of the floor frame 44. I'm passing it on.

Specifically, in this embodiment, the upper end portion 34A of the stud 34 is fixed to the web surface 42A of the ceiling beam 42, including bolts 45 and nuts 47, and the stud is fixed to the web surface 46A of the floor beam (floor beam) 46. The lower end portion 34B of 34 is fixed including a bolt 45 and a nut 47 (each connecting portion 49).

Further, one longitudinal end portion (hereinafter referred to as “end portion of the floor side overhang beam 36”) 36A of the floor side overhang beam 36 is attached to the lower end portion 34B of the stud 34 via a bolt 48 and a nut 50. It is fixed to the stud 34 (bolt joint 52). In addition, in the following description, a fixing part that is fixed via a bolt and a nut (so-called pin connection) will be referred to as a "bolt joint part", and a description of the bolt and nut will be omitted.

The turnbuckles 38 with battledores on both sides are fixed so that a triangle is formed between the studs 34 and the floor-side overhang beams 36. The turnbuckle 38 with battledores on both sides can expand and contract to adjust the tension, and one end in the longitudinal direction of the turnbuckle 38 with battledores on both sides (hereinafter referred to as "the end of the turnbuckle 38 with battledores on both sides") 38A is fixed to the lower part 34C side of the stud 34 (bolt joint 54). The other longitudinal end of the turnbuckle 38 with battledores on both sides (hereinafter referred to as "the end of the turnbuckle 38 with battledores on both sides") 38B is the other end of the floor side overhang beam 36 in the longitudinal direction (hereinafter referred to as "the end of the turnbuckle 38 with battledores on both sides"). It is fixed (bolted joint 56) to the 36B side (referred to as the "free end of the floor side overhang beam 36").

In this way, by fixing the turnbuckles 38 with both side battledores to the studs 34 and the floor side overhang beams 36 (bolt joints 54 and 56), the studs 34, the floor side overhang beams 36, and the side battledores are fixed. A triangle is formed with the turnbuckle 38, and a truss structure 58 is constituted by the stud 34, the floor side overhang beam 36, and the turnbuckle 38 with battledores on both sides.

On the other hand, one longitudinal end portion (hereinafter, "end portion of the ceiling side overhang beam 60") 60A of the ceiling side overhang beam 60 is fixed to the upper portion 34D side of the stud 34 (bolt joint portion 64). The ceiling side overhang beam 60 is arranged to face the upper side of the floor side overhang beam 36 in the vertical direction, whereas the floor side overhang beam 36 is arranged along a substantially horizontal direction. The ceiling side overhang beam 60 is inclined downward as it goes from the outer wall portion 24 toward the outdoors 30 side.

The channel steel 62 is fixed such that a triangle is formed between the stud 34 and the ceiling-side overhang beam 60. As described above, in this embodiment, the ceiling side overhang beam 60 is arranged at an angle. Therefore, here, the channel steel 62 is arranged along the substantially horizontal direction.

For this reason, for example, when the ceiling side overhang beam 60 is arranged along a substantially horizontal direction, the channel steel 62 will be arranged at an angle. Here, in this embodiment, the turnbuckle 38 with battledores on both sides and the channel steel 62 are used as members for fixing the stud 34, the floor side overhang beam 36, and the ceiling side overhang beam 60, respectively, but the tension can be adjusted. However, it is not limited to the turnbuckle 38 with battledores on both sides and the channel steel 62. The turnbuckle 38 with battledores on both sides is convenient because the tension can be finely adjusted in a state where the turnbuckle 38 with battledores on both sides is fixed.

By the way, the tension of the channel steel 62 can be adjusted by changing the fixing position, and one end of the channel steel 62 in the longitudinal direction (hereinafter referred to as "end of the channel steel 62") 62A is fixed to the stud 34 (bolt joint 66). Further, the other longitudinal end portion 62B of the channel steel 62 (hereinafter referred to as “the end of the channel steel 62”) is connected to the other longitudinal end portion of the ceiling side overhang beam 60 (hereinafter referred to as “the end portion of the channel steel 62”). The free end of the projecting beam 60 is fixed (bolted joint 68) to the 60B side (referred to as "free end"). A plurality of fixing holes are provided in the stud 34 in the longitudinal direction (vertical direction), and the tension can be adjusted by changing the fixing position.

In this way, by fixing the channel steel 62 to the studs 34 and the ceiling side overhang beam 60 (bolt joints 66 and 68), the studs 34, the ceiling side overhang beam 60, and the channel steel 62 are fixed. A triangle is formed between them, and a truss structure 70 is constituted by the studs 34, ceiling side overhang beams 60, and channel steel 62.

As described above, in this embodiment, as shown in FIG. A truss structure 70 is configured on the upper side of 12. In the overhang support portion 32, a connecting post 72 may be provided to connect the truss structure 58 and the truss structure 70. Note that this connecting column 72 is spanned between the floor side overhang beam 36 and the ceiling side overhang beam 60.

Further, connecting beams 74 and 75 may be provided to connect the pair of overhanging support portions 32 facing each other. Note that the connecting beam 74 is spanned between a pair of floor side overhang beams 36, and the connecting beam 75 is spanned between a pair of ceiling side overhang beams 60. Furthermore, the adjacent studs 34 may be bridged by a connecting beam 76.

(Functions and effects of overhanging floor structure)
Next, the operation and effect of the overhang portion 12 to which the overhang floor structure 10 according to the present embodiment is applied will be explained.

As shown in FIG. 2, in this embodiment, the overhang portion 12 is configured to include a pair of overhang support portions 32, and the overhang support portion 32 is connected to a stud 34 and a floor side overhang beam. 36, a turnbuckle 38 with battledores on both sides, a ceiling side overhang beam 60, and a channel steel 62.

To be more specific, in this embodiment, the space between the ceiling beam 42 and the floor beam 46, which constitute a part of the outer wall 24 (see FIG. 1) of the building 14 and are arranged to face each other above and below the building unit 16. A stud 34 spans the space in the vertical direction. A floor-side overhang beam 36 is fixed to the lower end portion 34B of the stud 34, and the floor-side overhang beam 36 is extended toward the outdoors 30 side. Further, a turnbuckle 38 with battledores on both sides is fixed to the stud 34 and a floor side overhang beam 36, an end 38A of the turnbuckle 38 with battledore on both sides is fixed to the stud 34, and an end 38B of the turnbuckle 38 with battledore on both sides is fixed to the stud 34 and the floor side overhang beam 36. It is fixed to the floor side overhang beam 36.

In this embodiment, in the overhang part 12, the studs 34 extending in the vertical direction and the floor-side overhang beams 36 extending from the studs 34 toward the outdoors 30 are provided with battledores on both sides. By fixing the turnbuckle 38, a truss structure 58 is constructed between the stud 34, the floor side overhang beam 36, and the turnbuckle 38 with battledores on both sides.

For example, as a comparative example, as shown in FIG. 3, when the turnbuckle 38 with both side battledores (see FIG. 2) is not provided in the overhang part 100, the floor side overhang beam 102 becomes cantilevered, A bending moment M about the joint 106 acts on the floor side overhang 102 at the joint 106 between the floor side overhang 102 and the column 104 . As a result, the floor side overhang beam 102 may be bent due to bending deformation, and the free end side of the floor side overhang beam 102 may hang down. Furthermore, there is a possibility that local deformation will occur in the joint portion 106.

Therefore, in the overhang part 100, in order to suppress the bending deformation of the floor side overhang beam 102, although not shown in the drawings, a support beam is used, or in order to increase the rigidity of the floor side overhang beam 102 and the joint part 106 themselves. For example, it may be necessary to increase the beam size of the floor-side overhanging beam 102 or to make the connecting portion 106 a rigid connection. Furthermore, the longitudinal dimension of the floor side overhang beam 102 may be set short.

In this way, when the beam size of the floor-side overhang beam 102 is increased, the overhang portion 100 itself becomes large, leading to an increase in cost. Moreover, if the overhanging part 100 itself becomes large, there is a possibility that it will interfere with a member adjacent to the overhanging part 100, and the position and size of the overhanging part 100 will be restricted.

On the other hand, in this embodiment, as shown in FIG. 2, a truss structure 58 is constructed between the stud 34, the floor side overhang beam 36, and the turnbuckle 38 with battledores on both sides in the overhang part 12. ing. Thereby, the bending moment M (see FIG. 3) generated in the floor side overhang beam 36 can be converted into an axial force acting on the stud 34, the floor side overhang beam 36, and the turnbuckle 38 with battledores on both sides.

That is, in this embodiment, it is possible to reduce the bending moment in the floor side overhang beam 36. Then, by expanding and contracting the turnbuckles 38 with battledores on both sides to adjust the tension, the axial force can be adjusted, and the bending deformation of the floor side overhang beam 36 can be suppressed in the overhang portion 12. In other words, in the overhang portion 12, the bending strength can be adjusted according to the overhang dimension and applied load.

As described above, in the present embodiment, it is possible to reduce the external force acting on the bolt joint 52 between the floor side overhang beam 36 and the stud 34 in the overhang 12, and to create a truss structure using the bolt joint 52. By adopting 58, the overhanging floor structure 10 can be simplified.

Further, in the present embodiment, in the overhang portion 12, the floor side overhang beam 36 has its end portion 36A fixed to a stud 34 that spans the ceiling beam 42 and the floor beam 46 in the vertical direction. For example, although not shown in the drawings, compared to the case where the floor side overhang beam 36 is fixed to the floor girder 46 of the building unit 16, in this embodiment, the floor side overhang beam 36 is fixed at an arbitrary position in the vertical direction of the stud 34. 36 can be fixed, it is possible to improve the degree of freedom in design of the projecting portion 12.

Furthermore, in the present embodiment, in the overhang 12, a turnbuckle 38 with double-sided battledores whose tension can be adjusted is used as a member forming a part of the truss structure 58. Accordingly, in this embodiment, the hanging of the free end portion 36B of the floor side overhang beam 36 is adjusted by adjusting the tension according to the bending deformation condition (deflection amount) of the floor side overhang beam 36. be able to.

That is, in this embodiment, the tension of the turnbuckle 38 with battledores on both sides is adjusted according to the size of the overhang 12, such as the position of the overhang 12, the amount of overhang of the overhang 12, and the width dimension of the overhang 12. It is possible to respond by changing the As a result, in this embodiment, the size of the projecting portion 12 can be determined arbitrarily, and the degree of freedom in design is increased.

Furthermore, in this embodiment, in the overhang 12, the tension of the turnbuckles 38 with battledores on both sides is changed according to the applied load, so the size of the cross section of the overhang 12 itself does not change. Therefore, it is possible to avoid the problem of interference between the projecting portion 12 and adjacent members, which occurs when the projecting portion 12 itself becomes large.

Furthermore, in the present embodiment, in the overhang portion 12, the overhang support portion 32 includes a ceiling side overhang beam 60 and a channel steel 62. The ceiling side overhang 60 is arranged to face the floor side overhang 36 upwardly in the vertical direction, and is fixed to the stud 34 and overhangs toward the outdoors 30 side. The channel steel 62 is fixed to the stud 34 and the ceiling side overhang beam 60, the end portion 62A of the channel steel 62 is fixed to the stud 34, and the end portion 62B of the channel steel 62 is fixed to the ceiling side overhang beam 60. is fixed.

As described above, in the present embodiment, in the overhang part 12, the channel steel is used for the vertically extending studs 34 and the ceiling side overhang beam 60 that extends from the studs 34 to the outdoor 30 side. By fixing 62, a truss structure 70 is constructed between the stud 34, the ceiling side overhang beam 60, and the channel steel 62.

As a result, in the present embodiment, in the overhang portion 12, the bending moment generated in the ceiling side overhang beam 60 is converted into an axial force acting on the studs 34, the ceiling side overhang beam 60, and the channel steel 62 by the truss structure 70. It is possible to reduce the bending moment in the ceiling side overhang beam 60. Then, in the channel steel 62, the axial force is adjusted by adjusting the tension by changing the fixing position, and in the overhang portion 12, the bending strength can be adjusted according to the overhang dimension and applied load.

In particular, in the present embodiment, in the overhang support part 32 of the overhang part 12, in addition to the truss structure 58 configured between the stud 34, the floor side overhang beam 36, and the turnbuckle 38 with battledores on both sides, the stud 34 A truss structure 70 is constructed between the ceiling side overhang beam 60 and the channel steel 62.

Therefore, in the overhanging section 12, among the loads acting on the studs 34 through the turnbuckles 38 with battledores on both sides, the load on the roof and ceiling sections (not shown) of the overhanging section 12 is absorbed by the channel steel 62. Can be dispersed. As a result, it becomes possible to reduce the bending moment acting on the studs 34.

Further, in the present embodiment, in the overhang portion 12, the floor side overhang beam 36 and the ceiling side overhang beam 60 are each fixed to the studs 34, so as described above, the floor side overhang beam 36 and the ceiling side overhang beam 36, The side overhang beam 60 can be fixed at any position in the vertical direction of the stud 34.

For this reason, although not shown in the drawings, for example, interference between the overhanging part 12 and the existing roof eaves and eave ceilings provided in the extending direction of the overhanging part 12 or on the top, bottom, left, and right sides of the overhanging part 12 is avoided. Therefore, the arrangement of the projecting portion 12 is not subject to any restrictions. Further, by changing the size of the studs 34, interference with the outer wall portion 24 (see FIG. 1) located below the overhang portion 12 can be avoided.

Furthermore, in this embodiment, the truss structures 58 and 70 are employed in the overhanging portion 12, so that the connection between each member is a bolt connection (pin connection). This allows the members to be connected more easily than rigid connections that involve welding.

For example, although not shown, if the floor side overhang 36 is connected to the floor girder 46 by welding, the amount of deflection of the free end 36B of the floor side overhang 36 is adjusted according to the local situation. I can't.

On the other hand, in this embodiment, the floor side overhang beam 36 is fixed to the stud 34 by bolt connection, and the turnbuckles 38 with side battledores are fixed to the floor side overhang beam 36 and the stud 34. In this case, the amount of deflection of the free end portion 36B of the floor-side overhang beam 36 can be adjusted by adjusting the tension of the turnbuckle 38 with battledores on both sides according to the local situation.

Further, in this embodiment, the turnbuckles 38 with battledores on both sides are coupled to the floor-side overhanging beam 36 and the stud 34 with bolts. Therefore, in the projecting portion 12, each component can be delivered to the site and assembled on site, making it easy to handle on site.

By the way, in this embodiment, by employing the truss structures 58 and 70 in the overhang part 12, the floor side overhang beam 36 and the turnbuckle with battledores 38 on both sides, the ceiling side overhang beam 60 and the channel steel 62 are connected to each other. Predetermined angles θ1 and θ2 are formed between them, respectively. The angle θ in the truss structures 58 and 70 is preferably 45°, but is not limited to this. For example, in this embodiment, θ1 is approximately 30° and θ2 is approximately 15°.

Further, considering the amount of deflection of the floor side overhang beam 36, the bolt connection portion 56 between the end portion 38B of the turnbuckle 38 with both side battledores and the floor side overhang beam 36 is located at the free end of the floor side overhang beam 36. 36B is preferred, but is not limited thereto.

For example, when a connecting post 72 (see FIG. 1) is provided at the free end 36B of the floor side overhang beam 36, in order to avoid interference with the connecting post 72, the end 38B of the turnbuckle 38 with battledores on both sides is , is coupled to the longitudinal center side of the floor side overhang beam 36. In this case, in the turnbuckle 38 with battledores on both sides, the angle θ1 is closer to 45° compared to the case where the end 38B of the turnbuckle 38 with battledores on both sides is connected to the free end 36B of the floor side overhang beam 36. or increase the tension.

In other words, in this embodiment, the studs 34, the floor-side overhang beams 36, and the ceiling-side overhang beams 60 are attached to the studs 34, the floor side overhang beams 36, and the ceiling side overhang beams 60, depending on the configuration of the overhang portion 12 (the presence or absence of the connecting columns 72, the connecting beams 74, and the support beams 76). On the other hand, the position and tension of the joint parts (bolt joint parts 52, 56, 66, 68) to which the both-side battledore-equipped turnbuckle 38 and the channel steel 62 are fixed can be changed. In addition, the connecting columns 72 enable load transmission between the floor side overhang beam 36 and the ceiling side overhang beam 60, and the load bearing ratio between the floor side truss structure 58 and the ceiling side truss structure 70 can be adjusted. This further improves the degree of freedom in design.

(Example)
Here, as a specific example, a bathroom 80 to which the projecting portion 12 is applied will be described.

For example, FIG. 4 shows a cross-sectional view of the lower floor 112 and upper floor 114 of the building 110 before renovation. In the building unit 116 on the upper floor 114 of this building 110, a bathroom 120 is provided along the outer wall 118, and a washroom 122 is provided adjacent to the bathroom 120.

On the other hand, FIG. 5 shows a cross-sectional view showing the lower floor 18 and upper floor 20 of the building 14 after renovation. In this embodiment, as shown in FIG. 5, an overhang 12 is provided on the upper floor 20 of the building 14, so-called floor expansion is performed, and the area of the washroom 82 is increased compared to before the renovation shown in FIG. The space of the bathroom 80 is also widened.

As shown in FIG. 2, the overhang part 12 in this embodiment has an overhang support part 32, a stud 34, a floor side overhang beam 36, a turnbuckle with battledores on both sides 38, a ceiling side overhang beam 60, and a groove. A truss structure 58 is constructed between the studs 34, the floor-side overhang beams 36, and the turnbuckles 38 with battledores on both sides. A truss structure 70 is configured with the steel 62.

As a result, in the overhang part 12 in this embodiment, the bending moment generated in the floor side overhang beam 36 and the ceiling side overhang beam 60 is converted into axial force by the truss structures 58 and 70, respectively, and the bending moment is reduced. I try to let them do it. By adjusting the tension in the turnbuckle 38 with battledores on both sides and the channel steel 62, it becomes possible to adjust the bending strength of the overhang portion 12 according to the overhang size and applied load. It is also possible to adjust the hanging of the tip.

Therefore, in this embodiment, as shown in FIG. 5, heavy objects can be placed on the overhang 12, and a bathtub 81 is provided on the overhang 12. Thereby, a sufficient space for the bathroom 80 can be secured. Additionally, along with this, the space of the washroom 82 can also be increased.

By the way, in general, the height difference (hereinafter referred to as "straddle dimension") H between the floor surface 83A of the washing area 83 of the bathroom 80 and the upper end 81A of the bathtub 81 is set as high as possible (for example, approximately 500 mm), and approximately 400 mm is considered appropriate.

For example, as a method of reducing the height difference H between the floor surface 83A of the washing area 83 of the bathroom 80 and the upper end 81A of the bathtub 81, there is a method of lowering the height of the upper end 81A of the bathtub 81. In this embodiment, as shown in FIG. 2, the floor side overhang beam 36 can be fixed at any position in the vertical direction of the stud 34, so the floor side overhang beam 36 is fixed to the stud 34. The position where the image is displayed can be shifted downward. Thereby, the height position of the bathtub 81 shown in FIG. 5 can be lowered, and the straddle dimension H can be set to be as low as possible.

On the other hand, in this embodiment, as shown in FIG. 2, the studs 34 are bolted to web surfaces 42A and 46A of the ceiling beam 42 and floor beam 46 of the building unit 16, respectively (joint portions 49). The ceiling girders and floor girders (each not shown) of the building 110 before renovation shown in FIG. After removing the outer wall portion 118, the studs 34 can be attached using the bolt holes.

In other words, since the studs 34 can be fixed to the ceiling beams 42 and floor beams 46 shown in FIG. 2 by using the already formed bolt holes, the studs 34 can be fixed to the ceiling beams 42 and floor beams 46 Moreover, the workability is better than the case where bolt holes are formed separately for the ceiling beam 42 and the floor beam 46. Note that if the hole diameter or hole position does not match, it goes without saying that a new bolt hole for stud connection may be provided.

(Modified example of this embodiment)
In the above embodiment, as shown in FIG. 1 and FIG. 6(A), an example in which one building unit 16 is provided with the overhang portion 12 has been described, but the application of this aspect is limited to this. isn't it.

For example, as a first modification, as shown in FIG. 6(B), the overhang 128 may be provided so as to span between two building units 124 and 126 arranged adjacent to each other. In this case, one stud 34 is provided on the building unit 124 side, and the other stud 34 is provided on the building unit 126 side.

In addition to this, as a second modification, in a unit building 132 provided with an inside corner 130, as shown in FIG. An overhanging portion 138 may be provided over 136. In this case, one stud 34 is provided on the building unit 134 side, and the other stud 34 is provided on the building unit 136 side.

In addition, in this embodiment, one stud 34 spans between the ceiling girder (not shown) on the long side of the building unit 134 and the floor girder 140, and the other stud 34 spans the short side of the building unit 136. It spans between the side ceiling beam (not shown) and the floor beam 142. Further, in this embodiment, the free ends of the floor side overhang beams 36 fixed to the studs 34 on the building unit 134 side and the free ends of the floor side overhang beams 36 fixed on the studs 34 on the building unit 136 side are mutually connected. May be combined.

Furthermore, in the above embodiment, a case has been described in which overhangs are provided in building units that are adjacent to each other along the horizontal direction, but as a third modification, as shown in FIG. The overhang 148 may be provided so as to span between the building units 144 and 146. In this case, the studs 34 will be provided in the building units 144 and 146, the floor side overhang beam 36 will be fixed to the stud 34 on the building unit 146 side, and the ceiling side overhang beam 60 will be fixed to the stud 34 on the building unit 144 side. Fixed.

Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and one embodiment and various modifications may be used in combination as appropriate, and the embodiment of the present invention It goes without saying that the invention can be implemented in various ways without departing from the spirit of the invention.

10 Overhanging floor structure 12 Overhanging part 14 Building 16 Building unit 24 External wall part 30 Outdoor 32 Overhanging support part 34 Stud 36 Floor side overhanging beam 38 Turnbuckle with battledore on both sides (first adjustment support means)
38A End (one end in the longitudinal direction of the first adjustment support means)
38B End (other end in the longitudinal direction of the first adjustment support means)
42 Ceiling beam (ceiling beam)
46 Floor beam (floor beam)
60 Ceiling side overhang beam 62 Channel steel (second adjustment support means)
62A End (one end in the longitudinal direction of the second adjustment support means)
62B End (other end in the longitudinal direction of the second adjustment support means)
80 Bathroom (overhang)
81 Bathtub (overhang)
124 Building unit 126 Building unit 128 Overhanging part 132 Unit building (building)
134 Building unit 136 Building unit 138 Overhang part 140 Floor beam (floor beam)
142 Floor beam (floor beam)
144 Building unit 146 Building unit 148 Overhanging part

Claims (2)

Studs that extend in the vertical direction and are fixed to the ceiling beams and floor beams that form part of the outer wall of the building and are arranged vertically opposite each other;
a floor side overhanging beam fixed to the stud and extending to the outdoor side;
a first adjustment support means having one longitudinal end fixed to the stud, the other longitudinal end fixed to the floor side overhang, and capable of adjusting tension ;
a ceiling side overhang beam that is arranged vertically opposite to the floor side overhang beam, is fixed to the stud and extends outdoors;
One end in the longitudinal direction is fixed to the stud, and the other end in the longitudinal direction is fixed to the ceiling side overhang beam, and is arranged so as to be able to face the first adjustment support means, so that the tension can be adjusted. a second adjustment support means;
An overhanging floor structure in which an overhanging part is formed by a pair of overhanging support parts provided with. The building is composed of multiple building units,
Of the pair of overhanging supports forming the overhang, one of the overhanging supports is provided in one of the building units arranged adjacent to each other, and the other overhanging support is provided with: The overhanging floor structure according to claim 1 , wherein the overhanging floor structure is provided in the other building unit of adjacent building units .