JP3246318B2 - Curtain wall mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curtain wall mounting structure, and more particularly, to an improvement of a curtain wall mounting structure capable of facilitating assembly.

[0002]

2. Description of the Related Art In general, as shown in FIG. 3, a curtain wall 2 attached to a building as an exterior material is provided with bolts 4 erected at the upper and lower four corners on the back side of the building, on upper and lower floors of the building. The structure 6 (for example, a slab, a beam, or the like) is fastened and attached to a fastener 8 formed of an L-shaped fitting or the like fixed to a structure. Here, the attachment of the fastener 8 to the building structure 6 is usually integrated by welding or the like.

The load of the curtain wall 2 is supported on the upper or lower floor structure 6 via load receiving bolts 10 at two locations, that is, upper and lower portions. The illustrated example is a curtain wall 2 made of precast concrete, and an anchor bolt is used for the bolt 4.

[0004] By the way, the building is vibrated and deformed by the wind or the earthquake, and when the deformation is large, the interlayer displacement between the upper floor and the lower floor of the building structure 6 accompanying the deformation is directly applied to the curtain wall 2. When it reaches, curtain wall 2
Is destroyed by the action of excessive force. Therefore, it is necessary to attach the curtain wall 2 to the building structure 6 so that the interlayer displacement between the upper floor and the lower floor can be absorbed to some extent. For this reason, as a mounting method for absorbing such interlayer displacement, horizontal movement (sway) has been roughly divided into the conventional methods.
Two methods, a method and a rotation (locking) method, are adopted.

In the horizontal moving system, for example, as shown in FIG. 4 (a), an upper bolt 4a of a curtain wall 2 is rigidly connected to a fastener fixed to a building structure on an upper floor. The wall 2 is displaced integrally with the building structure on the upper floor, while the bolt 4b on the lower side is slidably connected to the fastener fixed to the building structure on the lower floor in a horizontal direction relative to the fastener. The one shown in FIG. 3 corresponds to this horizontal movement type.
That is, as shown in FIGS. 3 (a) and 3 (b), the upper bolt 4a is rigidly connected to the fastener 8a welded to the beam 12 (building structure 6) on the upper floor, while the lower bolt 4a is connected to the lower bolt. Side bolt 4b is used as the mounting base 16 for the lower floor slab 14.
The bolt 4b is fixed to a fastener 8b provided integrally with the (building structure 6) so as to be relatively movable in the horizontal direction, and is formed on the fastener 8b as shown in FIG. Is formed as a horizontally long loose hole.

[0006] The above-mentioned rotation method is, for example, shown in FIG.
As shown in FIG. 5, the four bolts 4 are fastened and connected to the respective fasteners so as to be rotatable relative to each other, and when interlayer displacement occurs, the curtain wall 2 is rotated with the load receiving bolt 10 as a fulcrum. (Locking) By moving, the interlayer displacement is absorbed. In this case, the relative displacement between the bolt 4 and the fastener is small in the horizontal direction and large in the vertical direction. Is formed.

[0007]

However, in such a conventional mounting structure, when a larger deformation than originally expected occurs in the building structure 6 due to a large earthquake or the like, the interlayer displacement accompanying the deformation is long. There is a problem that the bolt 4 and the fastener 8 interfere with each other without being absorbed only by the insertion hole 9 formed as a hole as a loose hole, thereby applying an excessive force to the curtain wall 2 and damaging the curtain wall 2. was there.

[0008] The damage in such a case is a distortion or crack generated in the wall slab 2 a of the curtain wall 2, a breakage of a welded portion of the fastener 8, or the like.
Alternatively, the form of destruction may be various and random, such as the bolt 4 being broken, and the like. The site had to be thoroughly investigated.

In addition, since the peripheral portion of the fastener 8 is usually covered with a refractory material or the like, it takes a lot of labor, labor and time to find the damaged portion alone, and furthermore, it has various destruction forms. There is a problem that it is necessary to perform various repairs in response to the repairs, and it takes a lot of cost and time to recover the repairs.

It is also conceivable to increase the size of the through hole 9 formed as a loose hole in preparation for a large earthquake. However, this requires the fastener 8 to be considerably increased in size, resulting in an increase in the amount of steel and welding. There is a problem that the labor for the construction increases and the cost increases.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent a curtain wall of a building from being damaged at the time of an earthquake disaster as much as possible. An object of the present invention is to provide a curtain wall mounting structure which is excellent in cost and can reduce costs.

[0012]

In order to achieve the above object, according to the first aspect of the present invention, a bolt erected on the back of a curtain wall is fastened and fixed to a fastener provided on the building structure side. To restrain the curtain wall from moving in the out-of-plane direction, and to support the load of the curtain wall by a building structure on an upper floor or a lower floor through a load receiving portion provided at an upper portion or a lower portion of the back surface. In the curtain wall mounting structure described above, the bolt is provided on one of the upper side and the lower side of the curtain wall, and is fastened and fixed to a fastener provided on a corresponding building structure on the upper floor or the lower floor, and the curtain is fixed. The fore-edges at the upper and lower ends of the wall are relatively horizontal to the curtain wall adjacent to the upper or lower side, respectively. Allowing a countercurrent displacement and interlayer member angular displacement, characterized in that a engagement portion engaged with each other with each other.

According to the curtain wall mounting structure of the present invention having the above-mentioned structure, the curtain wall has a building structure on the upper floor or the lower floor only on one of the upper side and the lower side by bolts and fasteners. The other side is provided with an engaging portion provided at the fore-edge portion of the end face thereof, and is provided on the fore-edge portion of the facing end face of the curtain wall adjacently arranged on the upper side or the lower side thereof. The movement in the out-of-plane direction is restrained by being engaged with the engaging portion.

[0014] The two curtain walls vertically adjacent to each other have respective engaging portions provided at the fore-edge portions of the facing end surfaces thereof allowing relative horizontal displacement and interlayer member angular displacement. Therefore, even if a large earthquake causes a large interlayer displacement, the two curtain walls do not interfere with each other, so that an excessive stress acts on the curtain walls and does not lead to breakage.

Further, since only one upper or lower side of each curtain wall is fastened and fixed to the building structure side, the number of fastening points is halved compared to the conventional case, and the number of assembling steps is greatly reduced, and the assembly is reduced. The attachment work can be facilitated.

Here, as set forth in claim 2, the bolt is provided on the upper side of the curtain wall, and is fastened to a fastener provided on the building structure side of the upper floor, so that the bolt is directed to an out-of-plane direction on the upper side of the curtain wall. Constraining movement, the lower part of the curtain wall engages the engaging part of the fore edge part of the lower end with the engaging part of the fore part at the upper end of the curtain wall on the lower floor adjacent to the lower side. The upper side is fastened and fixed to the building structure in a state where the lower end of the curtain wall to be installed is engaged with the upper end of the curtain wall of the lower floor already installed, when the movement in the out-of-plane direction is regulated. Since it is possible, it is easy to stabilize the posture of the curtain wall during the assembling work, which is more preferable in terms of workability.

According to a third aspect of the present invention, the engaging portion includes a projection extending in the width direction along the upper edge portion of each curtain wall, and a groove extending in the width direction along the lower edge portion. It is good to consist of.

Further, the curtain wall may be formed of precast concrete. In this case, it is preferable that a protective cushion material is interposed between the projection and the groove.

[0019]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows an embodiment in which the curtain wall mounting structure according to the present invention is applied to a curtain wall made of precast concrete (hereinafter abbreviated as PC curtain wall). FIG. FIG. 2B is a perspective view of the PC curtain wall, and FIG. 2B is a side sectional view showing a state where the PC curtain wall is attached to a building. As shown in the figure, the PC curtain wall 20 is formed integrally with two block portions 24 protruding in a box shape on the left and right upper portions of the back surface of the concrete wall slab 22 as load receiving portions. An anchor bolt 26 is erected in the block portion 24.

The upper and lower edge portions 28 and 30 of the concrete wall slab 22 are provided with engaging portions 32 formed in an uneven shape which can be engaged with each other. The engaging portion 32 projects from the end face of the fore-edge portion 28 and extends in a plate shape along the width direction.
2a, the engaging portion 32 of the lower edge 30
Are recessed in the end face of the fore-edge portion 30 and
2a is formed as an engagement groove 32b into which is inserted.

When the PC curtain wall 20 is assembled into a building, the load receiving bolts 10 are arranged below the block portion 24 on the upper rear surface and are locked to the floor slab 14 on the upper floor. The load on the PC curtain wall 20 is the load receiving bolt 10
Through the floor slab 14 on the upper floor side.

An anchor bolt 26 erected on the block portion 24 is fastened and fixed to a fastener 8 fixed on a mounting base 16 provided integrally with the floor slab 14. That is, the upper side of the PC curtain wall 20 is fastened and fixed to the building structure 6 side by the anchor bolts 26 and the fasteners 8, the movement in the out-of-plane direction is restrained, and the in-plane direction interlayer displacement occurs in the building. Sometimes, the PC curtain wall 20 horizontally moves integrally with the floor slab 14 (building structure 6) on the upper floor. The fastening structure and the load support structure are the same as the conventional structure described with reference to FIG.

On the other hand, at the lower end of the PC curtain wall 20, the engagement groove 32b of the fore-edge portion 30 projects into the fore-edge portion 28 of the upper end portion of the curtain wall 20 on the lower floor adjacent to the lower side. The projection 32a is inserted into and engaged with the projection 32a, whereby the movement of the lower end in the out-of-plane direction is restricted. Here, the PC curtain wall 20 on the lower floor adjacently arranged on the lower side has the anchor bolt 2
Since the PC curtain wall 20 is fastened and fixed to the building structure 6 side by the fastener 6 and the fastener 8, the movement of the lower end side of each PC curtain wall 20 in the out-of-plane direction can be sufficiently restricted.

As shown in detail in the enlarged view of FIG.
A predetermined clearance is provided between the engagement protrusion 32a and the engagement groove 32b, so that the engagement protrusion 32a and the engagement groove 32b are formed along the width direction of the PC curtain wall 20 where they extend. And can move relatively horizontally,
The upper and lower PC curtain walls 20 and 20 can mutually absorb and absorb relative displacements in the in-plane direction accompanying the deformation of the building.

Further, even when an interlayer displacement occurs in an out-of-plane direction as shown in FIG. 2B, the upper and lower PC curtain walls 20, 20 are easily moved relative to each other by the engaging portions 32 by the clearance. By rotating, the interlayer member angular displacement θ generated between them is allowed. At this time, even if vertical interlayer displacement occurs, it can be sufficiently absorbed.

Here, the fore-edge portion 2 of the engagement portion 32
8 and 30, the upper and lower PC curtain walls 20,
A protection cushion member 34 made of an elastic material such as rubber is interposed in order to prevent collision between the engagement projection 32a and the engagement groove 32b of the pair 20 and protect them from damage.

Therefore, in the mounting structure of the PC curtain wall as described above, the building may be damaged by the earthquake.
Even if interlayer displacement occurs in the in-plane direction of the C curtain wall 20, since there is substantially no allowable deformation limit as in the conventional loose-hole type fastener, the interlayer displacement in the in-plane direction becomes considerably large. However, no excessive external force acts on the PC curtain wall 20, and this is prevented as much as possible from being destroyed.

Further, with respect to the interlayer displacement in the out-of-plane direction,
Since this can be absorbed by the interlayer member angular displacement θ between the upper and lower PC curtain walls 20, 20, the generation of external force due to the interlayer displacement in the out-of-plane direction can be suppressed as much as possible, and it is possible to prevent the destruction. .

Further, each one PC curtain wall 2
. 0,20... Are only fastened and fixed to the upper side of the building structure 6, so that the fastening locations are halved as compared with the prior art, and the location of the fastening members and the number of assembling steps can be greatly reduced. Further, in assembling, the upper side of the PC curtain wall 20 to be installed can be fastened and fixed to the building structure 6 in a state where the lower end of the PC curtain wall 20 to be installed is engaged with the upper end of the already installed PC curtain wall 20 on the lower floor. PC curtain wall 2 during assembly work
It is excellent in assembling workability, for example, it is easy to stabilize the zero position, so that the construction period can be shortened and the construction cost can be reduced.

The fastening and fixing by the anchor bolt 26 may be performed on the lower side of the PC curtain wall 20, and the load may be supported by the load receiving bolt 10 on the lower side. Further, in the above embodiment, the case where the present invention is applied to the PC curtain wall is shown. However, the present invention is not limited to this PC curtain wall, but can be applied to a metal curtain wall, a hybrid curtain wall, and the like. It is.

[0032]

As described above in detail, according to the mounting structure of the PC curtain wall according to the present invention, only one of the upper side and the lower side of the curtain wall is provided on the upper floor side by bolts and fasteners. Alternatively, the engaging portion provided at the fore-edge portion of the end surface is fastened and fixed to the building structure on the lower floor side, and the engaging portion provided on the edge portion of the end surface is adjacent to the facing end surface of the curtain wall arranged side by side on the upper side or lower side. The movement in the out-of-plane direction is restricted by being engaged with the engaging portion provided in the fore-edge portion.

The two curtain walls arranged vertically adjacent to each other have respective engaging portions provided at the fore-edge portions of the facing end surfaces to allow relative horizontal displacement and interlayer member angular displacement. Even if a large earthquake causes large interlayer displacement in the in-plane direction and out-of-plane direction due to a large earthquake, the curtain walls do not interfere with each other, and excessive stress acts on the curtain wall, causing damage. Never lead to.

Further, since only one upper or lower side of each curtain wall is fastened and fixed to the building structure side, the number of fastening points is halved as compared with the conventional one, and the number of assembling steps is greatly reduced, and Work becomes easier, and construction costs can be reduced.

Here, the bolt is provided on the upper side of the curtain wall and fastened to a fastener provided on the building structure side of the upper floor to restrain the curtain wall from moving in an out-of-plane direction on the upper side. The lower side engages the engaging portion of the fore edge portion of the lower end with the engaging portion of the fore edge portion of the upper end of the curtain wall of the lower floor disposed adjacent to the lower side, and moves in the out-of-plane direction. If you try to regulate
Since the upper side can be fastened and fixed to the building structure while the lower end of the curtain wall to be installed is engaged with the upper end of the curtain wall of the lower floor already installed, it is easy to stabilize the posture of the curtain wall during assembly work. In addition, workability can be further improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a curtain wall mounting structure according to the present invention is applied to a PC curtain wall. FIG. 1 (a) is a perspective view of the PC curtain wall, and FIG. 1 (b). FIG. 3 is a side sectional view showing a state of attachment to a building.

2 (a) and 2 (b) are the same as those in FIG.
FIG. 2B is an enlarged view showing part II in FIG. 2 in detail, and FIG.
(A) shows a normal state, and (b) shows a state in which an interlayer member angular displacement occurs.

FIG. 3 is a cross-sectional view showing a conventional PC curtain wall mounting structure.

FIG. 4 is a view schematically illustrating two methods, a horizontal movement (sway) method and a rotation (locking) method, which are conventionally adopted as a mounting method for absorbing interlayer displacement.

[Explanation of symbols]

Reference Signs List 6 building structure 8 fastener 10 load receiving bolt 12 beam 14 slab 16 mounting pedestal 20 PC curtain wall 22 concrete wall slab 24 block portion (load receiving portion) 26 anchor bolt 28 upper fore edge portion 30 lower fore edge portion 32 engagement portion 32a Engagement projection 32b Engagement groove 34 Protective cushion material

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Masataka Sekine 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (56) References JP-A-2-61243 (JP, A) 61-3807 (JP, U) JP 7-4618 (JP, U) JP 63-96115 (JP, U) JP-B 56-20421 (JP, B2) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04B 2/56-2/70 E04B 2/88-2/96

Claims (4)

(57) [Claims] 1. A bolt erected on the back surface of a curtain wall is fastened and fixed to a fastener provided on a building structure side to restrain movement of the curtain wall in an out-of-plane direction and to reduce a load of the curtain wall on the back surface. The mounting structure of a curtain wall, which is supported by a building structure on an upper floor or a lower floor through a load receiving portion provided on an upper or lower part of the curtain wall, wherein the bolt is provided on an upper side or a lower side of the curtain wall. Provided on either side, and fastened and fixed to the fastener provided on the corresponding upper-floor or lower-floor building structure side, and adjacent to the upper and lower ends of the curtain wall adjacent to the upper or lower side, respectively. Provided with an engaging portion that allows the relative horizontal displacement and the interlayer member angular displacement to be engaged with each other in a curtain wall to be juxtaposed, A curtain wall mounting structure, characterized in that: 2. A method according to claim 1, wherein the bolt is provided on an upper side of the curtain wall and fastened to a fastener provided on a building structure side of an upper floor to restrain the curtain wall from moving in an out-of-plane direction on the upper side. The side engages the engaging portion of the fore edge portion of the lower end with the engaging portion of the fore edge portion of the upper end of the curtain wall of the lower floor arranged adjacent to the lower side,
The curtain wall mounting structure according to claim 1, wherein the movement in the out-of-plane direction is restricted. 3. The method according to claim 1, wherein the engaging portion comprises a protrusion extending in the width direction along the upper edge of the curtain wall and a groove extending in the width direction along the lower edge. 2. The mounting structure of the curtain wall according to 2. 4. The curtain wall mounting structure according to claim 3, wherein the curtain wall is formed of precast concrete, and a protective cushion material is interposed between the projection and the groove.