JP2015074929A - External overhanging structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an external overhanging structure capable of utilizing an external space of an existing exterior wall.SOLUTION: An external overhanging structure 10 includes an existing exterior wall 12 in which an exterior wall opening 18 is formed, and a terrace 70 that is mounted on the existing exterior wall 12 by post-construction and that has an overhanging floor part 70A overhanging to the outside from the downside of the exterior wall opening 18.

Description

  The present invention relates to an external overhang structure.

  A balcony is known which is constructed at the same time as the outer wall of a structure at the time of a new construction, and makes it possible to use an external space outside the outer wall as, for example, a refresh space (for example, see Patent Document 1).

JP 2003-111987

  By the way, even in the existing structure, there is a demand to use the external space of the existing outer wall as a refresh space or the like. Similarly, there is a demand for changing the external space of the existing outer wall to a refresh space or the like due to the design deformation after the outer wall construction, even for a new structure.

  In view of the above facts, an object of the present invention is to obtain an external projecting structure that can utilize the external space of an existing external wall.

  The external overhang structure according to claim 1 includes an existing outer wall in which an outer wall opening is formed, and an overhang floor portion that is attached to the existing outer wall by post-construction and projects outward from the lower side of the outer wall opening. Yes.

  According to the external overhanging structure according to claim 1, an external space outside the existing outer wall can be provided, for example, a refresh space by attaching an overhanging floor portion that projects outward from the lower side of the outer wall opening to the existing outer wall by post-construction. Etc. can be used.

  Further, the overhanging floor portion is not supported by the pillar. Accordingly, the external space can be used without increasing the total floor area (building area) up to a predetermined overhang amount.

  The external overhang structure according to claim 2 is the overhang structure according to claim 1, wherein the external overhang structure is attached to the existing outer wall by post-construction and protrudes outward from the upper side of the outer wall opening, and both sides of the outer wall opening And a pair of side wall portions that connect the floor portion and the flange portion and surround the outer wall opening with the floor portion and the flange portion.

  According to the external projecting structure according to the second aspect, wind and rain and solar radiation can be shielded by attaching the collar portion projecting outward from the upper side of the outer wall opening to the existing outer wall by post-construction.

  Further, by capturing the wind with the pair of side wall portions arranged on both sides of the outer wall opening, the wind can be taken into the structure through the outer wall opening. By utilizing the wind (natural wind) in this way, the environmental performance of the structure can be improved while saving energy.

  Furthermore, the external appearance of the structure can be improved by surrounding the outer wall opening with the overhanging floor portion, the flange portion, and the pair of side wall portions to impart design characteristics.

  The external overhang structure according to claim 3 is the overhang structure according to claim 2, wherein a plurality of the outer wall openings are formed in the existing outer wall, and the floor portion, the flange portion, and the pair of side wall portions are provided. , One of the outer wall openings is surrounded.

  According to the external overhang structure according to claim 3, the external appearance of the structure can be improved by surrounding one outer wall opening with the floor portion, the flange portion, and the pair of side wall portions to have design properties. .

  The external overhang structure according to claim 4 is the overhang structure according to claim 2 or claim 3, and includes a steel plate that is attached to the outer wall by post-construction and has an opening facing the outer wall opening. The floor portion and the flange portion are attached to the steel plate.

  According to the external overhang structure according to claim 4, by attaching a steel plate with an opening facing the outer wall opening to the outer wall by post-construction, seismic performance while ensuring viewability, daylighting, ventilation, etc. Can be improved.

  In addition, by attaching the floor and the buttock to the steel plate, that is, by using the steel plate as a base material for the floor and the buttock, the construction is performed in comparison with the case where the floor and the buttock are directly attached to the existing outer wall. It becomes easy.

  Furthermore, since at least a part of the steel plate is covered by the floor portion, the flange portion, and the pair of side wall portions, finishing of the steel plate can be omitted.

  As described above, according to the external overhang structure according to the present invention, the external space of the existing external wall can be used.

It is a perspective view which shows the existing outer wall and terrace to which the external overhang | projection structure which concerns on one Embodiment of this invention was applied. It is an elevation view which shows the state which removed the terrace from the existing outer wall shown by FIG. It is an elevation view which shows the terrace shown by FIG. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG.

  Hereinafter, an external overhang structure according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an existing outer wall 12 and a terrace (external terrace) 70 of a structure to which the external overhanging structure 10 according to the present embodiment is applied. The terrace 70 is attached to the peripheral portion of the outer wall opening 18 formed in the existing outer wall 12 of the structure by post-construction, and makes it possible to use an external space outside the existing outer wall 12 as a refresh space, for example. The terrace 70 is attached to the existing outer wall 12 via the steel earthquake resistant wall 30. The terrace 70 can also be regarded as a veranda.

(Steel shear wall)
First, the configuration of the steel earthquake resistant wall 30 will be described. The steel seismic wall 30 is used as a base material for seismic reinforcement of the existing outer wall 12 and for attaching the terrace 70 to the existing outer wall 12. The existing outer wall 12 is a reinforced concrete structure (RC structure), and is provided in a frame formed by upper and lower beams 14 (see FIG. 4) and left and right columns 16 (see FIG. 5).

  As shown in FIG. 2, the steel earthquake resistant wall 30 as a steel plate is formed in a rectangular frame shape when viewed from the front, and an opening 20 is formed at the center thereof. The steel seismic wall 30 is arranged with the opening 20 facing the outer wall opening 18 so as not to block the outer wall opening 18 of the existing outer wall 12. The opening 20 of the steel seismic wall 30 is made larger than the outer wall opening 18. A sash 20 is attached to the rectangular outer wall opening 18.

  The steel earthquake resistant wall 30 is formed by providing a corrugated steel plate 32 or surface plates 46 and 50 on a frame portion of a lattice-like body in which a plurality of vertical flanges 36 and horizontal flanges 38 are joined in a lattice shape. The steel earthquake resistant wall 30 includes a wall portion 30B in which the opening 20 is formed, and an upper joint portion 30A and a lower joint portion 30C that are provided above and below the wall portion 30B and joined to the upper and lower beams 14, respectively. Have. A corrugated steel plate 32 is provided on the wall portion 30B, and surface plates 46 and 50 are provided on the upper joint portion 30A and the lower joint portion 30C, respectively. The lower surface plate 50 is provided across the wall portion 30B and the lower joint portion 30C. Further, the surface plates 46 and 50 are appropriately provided with stiffening ribs 40.

  The corrugated steel plate 32 is formed in a cross-sectional corrugated shape, and is disposed on both sides of the opening 20 with the crease being lateral (horizontal direction). The corrugated steel plate 32 is shear-deformed during an earthquake to resist horizontal force, or yields to absorb seismic energy, thereby reducing the vibration of the structure. Although not shown in FIG. 2, a finishing panel 42 (see FIG. 1) such as an aluminum panel is provided on the outer surface of the wall 30B of the present embodiment.

  As shown in FIG. 4, the upper joint portion 30 </ b> A and the lower joint portion 30 </ b> C are arranged to face the outer surfaces 14 </ b> A of the upper and lower beams 14. A plurality of headed studs (not shown) protrude from the surface plates 46 and 50 of the upper joint 30A and the lower joint 30C. On the other hand, a plurality of anchor members 54 are embedded in the outer surface 14A of the beam 14. Further, a filler 56 such as concrete is filled between the surface plates 46 and 50 and the beam 14. By integrating the headed stud and the anchor member 54 with the filler 56, the upper joint portion 30A and the lower joint portion 30C are joined to the outer surfaces 14A of the upper and lower beams 14 so as to transmit shearing force. .

  Note that the method of joining the upper joint 30A and the lower joint 30C to the upper and lower beams 14 is not limited to that described above. For example, the upper joint 30A is formed by a cap nut and a bolt embedded in the outer surface 14A of the beam 14. And the lower joint portion 30C may be joined.

(terrace)
Next, the configuration of the terrace 70 will be described. As shown in FIG. 3, the terrace 70 surrounds the outer wall opening 18 with the floor skeleton material 72, the eaves skeleton material 82, and the side wall skeleton material 86 supported on the outer periphery of the opening 20 in the steel seismic wall 30. It is formed by covering with a frame-shaped cover 90. The frame-shaped cover 90 is formed by connecting a plurality of surface panels such as aluminum panels. The terrace 70 includes an overhanging floor portion 70A, a flange portion 70B, and a pair of side wall portions 70C, and is provided in units of the outer wall opening 18.

  The overhanging floor portion 70A projects outward from the lower side of the outer wall opening 18. In this overhanging floor portion 70A, four floor skeleton members 72 supported in a cantilever manner on the lower part of the steel seismic wall 30 and a connecting member 74 spanned on the front ends of these floor skeleton members 72 are provided. Is provided. The floor skeleton material 72 and the connecting material 74 are made of, for example, H-shaped steel. Further, as shown in FIG. 4, a handrail 76 having a height approximately half that of the outer wall opening 18 is raised from the front end portion of the overhanging floor portion 70A in the overhanging direction. In the present embodiment, a glass handrail is used as the handrail 76, but another handrail may be used. Moreover, the handrail 76 can be omitted as appropriate.

  The base end portion of the floor skeleton member 72 is joined to the steel seismic wall 30 by bolts, welding, or the like (not shown) while being abutted against the steel earthquake resistant wall 30. Also, as shown in FIG. 5, a plurality of floor panels 78 are laid on the floor skeleton material 72 and the connecting material 74. In this embodiment, the floor panel 78 is a wood deck, but other panel materials may be used.

  As shown in FIG. 3, the flange portion 70B projects outward from the upper side of the outer wall opening 18, and faces the projecting floor portion 70A in the vertical direction. The hook 70B is provided with four hook skeleton members 82 that are cantilevered on the upper part of the steel earthquake resistant wall 30 and a connecting member 84 that is stretched over the tips of these hook skeleton members 82. It has been. The skeleton material 82 is made of, for example, an H-shaped steel. Further, as shown in FIG. 4, the upper surface panel 90A of the collar portion 70B is an inclined surface that is inclined downward as it goes outward.

  As shown in FIGS. 3 and 5, the pair of side wall portions 70 </ b> C are disposed on both the left and right sides of the outer wall opening 18, and project outward from the steel seismic wall 30. Each side wall portion 70C connects the end portions in the left-right direction of the overhanging floor portion 70A and the flange portion 70B. A side wall skeleton member 86 extending in the vertical direction is provided on the front end side (outer end side) of the side wall portion 70C in the protruding direction. The side wall skeleton 86 is made of, for example, H-shaped steel.

  As shown in FIG. 5, the side wall portion 70 </ b> C is disposed at a position away from the side edge portion of the outer wall opening 18. Thereby, the width (length in the left-right direction) of the floor space of the overhanging floor portion 70 </ b> A is wider than the opening width of the outer wall opening 18. A plurality of shelves 88 for the greening pod 24 (see FIG. 3) are provided on the inner wall surface of the side wall 70C. The shelf 88 can be omitted as appropriate. Moreover, you may provide suitably the lighting fixtures, such as LED, in the terrace 70. FIG.

  Next, the operation of this embodiment will be described.

  The terrace 70 is attached to the periphery of the outer wall opening 18 of the existing outer wall 12 by post-construction. The terrace 70 has an overhanging floor portion 70 </ b> A that projects outward from the lower side of the outer wall opening 18. Thereby, the external space outside the existing outer wall 12 can be used as, for example, a refresh space. Further, the overhanging floor portion 70A of the terrace 70 is not supported by a pillar or the like. Therefore, the external space can be used without increasing the total floor area (building area) up to a predetermined overhang amount. The terrace 70 can be used not only for a refresh space but also for various purposes.

  Further, the terrace 70 has a flange portion 70 </ b> B that projects outward from the upper side of the outer wall opening 18. Wind and rain and solar radiation can be shielded by the flange 70B.

  Further, the terrace 70 has a pair of side wall portions 70 </ b> C disposed on the left and right sides of the outer wall opening 18. For example, as shown in FIG. 5, the natural wind F flowing along the existing outer wall 12 can be captured by the side wall 70 </ b> C into the room through the outer wall opening 18. Therefore, since the indoor ventilation using the natural wind F can be performed efficiently, the environmental performance of the structure can be improved while saving energy.

  Moreover, the pair of side wall portions 70C connect the end portions in the left-right direction of the overhanging floor portion 70A and the flange portion 70B. Thereby, since the shielding performance of wind and rain and solar radiation increases, the terrace 70 can be used more comfortably. Moreover, since it becomes easy to open the sash 20 even on a rainy day, indoor ventilation can be promoted. Furthermore, by raising the pair of side wall portions 70 </ b> C on both sides of the outer wall opening 18, fear of using the terrace 70 can be eliminated.

  Moreover, the external appearance of a structure can be made favorable by enclosing the outer-wall opening 18 with the overhang | projection floor part 70A, the collar part 70B, and a pair of side wall part 70C, and giving designability. Furthermore, as shown in FIG. 1, the terrace 70 is provided in units of the outer wall openings 18. By arranging these terraces 70 in, for example, a staggered pattern, the appearance of the structure can be further improved.

  The terrace 70 is attached to the existing outer wall 12 via the steel seismic wall 30. Thereby, the seismic performance can be improved while using the external space of the existing outer wall 12. The steel seismic wall 30 has an opening 20 that faces the outer wall opening 18 and is attached to the existing outer wall 12 so as not to block the outer wall opening 18. Accordingly, the seismic performance can be improved while ensuring the viewability, the daylighting property, the ventilation property, and the like.

  Further, by using the steel earthquake resistant wall 30 as a base material for the terrace 70, the workability is improved as compared with the case where the terrace 70 is directly attached to the existing outer wall 12. Furthermore, since a part of the steel earthquake-resistant wall 30 is covered by the terrace 70, finishing of the steel earthquake-resistant wall 30 can be omitted. In addition, since the terrace 70 can be constructed using a scaffold for the steel earthquake resistant wall 30, the construction cost can be reduced.

  Next, a modification of the above embodiment will be described.

  In the said embodiment, although the example which connected the overhanging floor part 70A and the collar part 70B with a pair of side wall part 70C was shown, it is not restricted to this. For example, the height of the side wall portion 70C may be reduced, and a gap or space may be formed between the upper end portion of the side wall portion 70C and the flange portion 70B, or the side wall portion 70C may be separated from the flange portion 70B like a hanging wall. You can hang it.

  Moreover, although the example which provided the collar part 70B and the pair of side wall part 70C in the terrace 70 was shown in the said embodiment, it is not restricted to this. The terrace 70 only needs to have at least an overhanging floor portion 70A, and the flange portion 70B and the pair of side wall portions 70C can be omitted as appropriate. It is possible to omit only one of the pair of side wall portions 70C.

  Moreover, although the example which provided the terrace 70 in the outer wall opening 18 unit was shown in the said embodiment, it is not restricted to this. The terrace 70 may be provided across the plurality of outer wall openings 18.

  Moreover, although the example which formed the steel earthquake-resistant wall 30 with the corrugated steel plate 32 was shown in the said embodiment, it is not restricted to this. The steel earthquake resistant wall 30 may be formed of, for example, a flat steel plate. Moreover, in the said embodiment, although the steel earthquake-resistant wall 30 was used as a base material of the terrace 70, it is not restricted to this. Various steel plates can be used as the base material. Further, it is possible to directly attach the terrace 70 to the existing outer wall 12 without using a base material.

  Moreover, in the said embodiment, although the existing outer wall 12 is made into RC structure and the upper and lower beams 14 and the right and left pillar 16 are made into RC structure or SRC structure, it is not restricted to this. The existing outer wall 12 may be, for example, various types of outer wall boards, and the upper and lower beams 14 and the left and right columns 16 may be, for example, steel structures.

  Furthermore, the terrace 70 may be attached not only to the existing outer wall 12 of the existing structure but also to the existing outer wall of the new structure by post-construction. That is, the post-construction in the present embodiment means that the terrace 70 is attached to the constructed outer wall (existing outer wall) regardless of whether it is an existing structure or a newly built structure.

  As mentioned above, although one embodiment of the present invention was described, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate, and the gist of the present invention will be described. Of course, various embodiments can be implemented without departing from the scope.

10 External overhang structure 12 Existing outer wall 18 Outer wall opening 20 Opening (opening of steel plate)
30 Steel shear wall (steel plate)
70 Terrace 70A Overhanging floor part 70B Gutter part 70C Side wall part (a pair of side wall parts)

Claims (4)

An existing outer wall in which an outer wall opening is formed;
An overhang floor portion attached to the existing outer wall by post-construction and projecting outward from the lower side of the outer wall opening;
With external overhang structure. A flange that is attached to the existing outer wall by post-construction and projects outward from the upper side of the outer wall opening,
A pair of side wall portions disposed on both sides of the outer wall opening, connecting the floor portion and the flange portion, and surrounding the outer wall opening with the floor portion and the flange portion;
The overhang structure according to claim 1, comprising: A plurality of the outer wall openings are formed in the existing outer wall,
The floor portion, the flange portion, and the pair of side wall portions surround one outer wall opening,
The overhang structure according to claim 2. Attached to the outer wall by post-construction, and comprises a steel plate in which an opening facing the outer wall opening is formed,
The floor and the flange are attached to the steel plate,
The overhang structure according to claim 2 or claim 3.

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