JP6994333B2 - Curtain walls and buildings - Google Patents

Description

The present invention relates to a precast concrete curtain wall with a refractory material attached to the inside of the building of a sash frame concrete portion constituting the curtain wall, and a building using the curtain wall as an outer wall.

Conventionally, a curtain wall to which a refractory material is attached in advance has been known (see Patent Documents 1 to 3).
In Patent Document 1, a square opening frame is formed by a pair of mullion (vertical frame material) and a transom light (horizontal frame material or horizontal rail) installed between the pair of mullion, and these opening frames are formed. A curtain wall is shown in which glass is fitted in the portion and a fireproof board is attached to the indoor side of the glass with respect to a predetermined opening frame portion.

Patent Document 2 discloses a fireproof coating structure including a non-fireproof outer wall and structural members such as beams and columns in the vicinity of the non-fireproof outer wall. The outdoor surface of the structural member is covered with the first refractory plate material, and the inner surface other than the window of the non-refractory outer wall is covered with the second refractory plate material laminated with the first refractory plate material. The portion of the outer periphery of the structural member on the indoor side that is not covered by the first refractory plate material is covered with the refractory coating layer.
Patent Document 3 shows an aluminum curtain wall in which mounting hardware having a substantially U-shaped cross section is mounted in a mullion manner, and a fireproof board is inserted between adjacent mounting hardware U-shaped openings. Has been done.
Conventionally, when a fireproof material is installed between a precast concrete curtain wall (hereinafter referred to as PCCW) and a building skeleton, after the PCCW is attached to the building skeleton, post-construction is performed between the PCCW and the building skeleton. The fireproof material was attached. Therefore, a sufficient space is required to reliably install the refractory material between the PCCW and the building frame, and the living space inside the building may be partially narrowed. In addition, since the refractory material is installed at the site, the workability is lowered and the construction period of the building may be prolonged as compared with the case where the refractory material is installed in advance in a factory or the like.

Japanese Unexamined Patent Publication No. 2007-170075 Japanese Patent No. 3646954 Japanese Unexamined Patent Publication No. 2007-321349

The present invention provides a precast concrete curtain wall and a building using the curtain wall as an outer wall, which can install a refractory material in the gap even when the gap between the curtain wall and the building frame is narrow. Make it an issue.

At a PC factory, the present inventors have attached a fireproof material to the inside of the building of the sash frame concrete part of a precast concrete curtain wall (PCCW) for flame insulation measures, and manufactured a PCCW with a fireproof material in advance. The present invention was made by focusing on the fact that the fireproof material can be installed between the PCCW and the skeleton even if the gap between the PCCW and the building skeleton is narrow by carrying the PCCW with the fireproof material to the construction site and installing it. rice field.
The curtain wall of the first invention (for example, the curtain wall 10 described later) is a precast concrete curtain wall, and the precast concrete sash frame concrete portion (for example, the sash frame concrete portion 20 described later) and the said. It is characterized by comprising a plate-shaped fireproof material (for example, the fireproof material 40 described later) attached to the inside of the building of the sash frame concrete portion.

According to the present invention, a refractory material is attached to the inside of the building of the PCCW in advance, and the PCCW to which the refractory material is attached is lifted and attached to the building frame at the construction site. By attaching the refractory material to the PCCW in advance in this way, even if the gap between the PCCW and the building frame is narrow, it is possible to prevent a decrease in workability and construct the building in a short construction period. In addition, it is necessary to lift the PCCW in a state where the skeleton of the building such as floor slabs and beams is constructed, secure a work space between the skeleton of the building and the PCCW, and install refractory materials in the post-construction. Because there is no room space, the living space will not be narrowed.

In the curtain wall of the second invention, the sash frame concrete portion is arranged below the upper frame concrete portion extending in the horizontally direction (for example, the upper frame concrete portion 21 described later) and the upper frame concrete portion in the horizontal direction. (For example, the lower frame concrete portion 22 described later) and a plurality of cubic concrete portions (for example, described later) extending in the vertical direction and connecting the upper frame concrete portion and the lower frame concrete portion. A notch (for example, a notch 25 to be described later) is formed on the surface of the upper frame concrete portion on the inner side of the building, and the upper end side of the fireproof material is provided. Is locked to the notch portion.

According to the present invention, since the refractory material is locked in the notch portion of the upper frame concrete portion constituting the PCCW, the refractory material can be reliably positioned on the inside side of the building of the PCCW, and the living space in the building facing the PCCW. Can be widely secured.
Further, the refractory material attached to the concrete portion of the upper frame can prevent smoke and flame from wrapping around from below to above the PCCW in the event of a fire.

The building of the third invention is characterized in that the above-mentioned curtain wall is used for the outer wall.
According to the present invention, it is possible to realize a building using a precast concrete curtain wall with a refractory material for the outer wall.
In this way, by using a precast concrete curtain wall with a refractory material on the outer wall of the building, even if the gap between the PCCW and the building frame is narrow, the fireproof material can be installed between the PCCW and the building frame. A large living space can be secured inside the building. Further, since the refractory material is attached to the PCCW to be lifted in advance, it is not necessary to attach the refractory material after the PCCW is attached to the building frame at the construction site, and the building can be constructed in a short construction period.

According to the present invention, even when the gap between the curtain wall and the building frame is narrow, the PC factory manufactures a precast concrete curtain wall with a refractory material to which a refractory material is attached in advance, and the curtain wall is used. By carrying it into the construction site and installing it, the fireproof material can be attached to the curtain wall even if the gap between the curtain wall and the building frame is narrow and small. In addition, it is possible to realize a building equipped with a precast concrete curtain wall with a refractory material on the outer wall.

It is a front view of the outer wall of the building which adopted the curtain wall which concerns on one Embodiment of this invention. FIG. 3 is a cross-sectional view taken along the line AA of the building shown in FIG. 1 in the vertical direction. It is a horizontal sectional view (FIG. 3a) of the upper part of the curtain wall, and BB arrow view (FIG. 3b) of the upper part of this curtain wall. FIG. 3 is a cross-sectional view taken along the line CC of the upper part of the curtain wall shown in FIG. It is a flowchart of the building construction procedure using the curtain wall of this invention as an outer wall.

The present invention uses a precast concrete curtain wall (FIGS. 1 to 4) with a refractory material attached to the inside of the building of the sash frame concrete portion constituting the curtain wall, and the curtain wall as the outer wall. It is a building. The present invention is characterized in that a refractory material is attached to the inside of the building and above the sash opening of the concrete portion of the sash frame of the curtain wall (FIG. 2).
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an outer wall of a building 1 in which a curtain wall 10 according to an embodiment of the present invention is adopted. FIG. 2 is a sectional view taken along the line AA of the building 1 shown in FIG. 1 in the vertical direction.
The building 1 includes a precast concrete curtain wall (PCCW) 10, an outer beam 11 which is a building frame, a floor slab 12 which is a building frame, a blind box 13, an air conditioning outlet 14, and a ceiling material 15.

The outer peripheral beam 11 is H-shaped steel and extends horizontally along the outer periphery of the building 1. The floor slab 12 is made of reinforced concrete and is built on the outer peripheral beam 11.
A sleeve 16 penetrating in the horizontal direction is attached to the outer peripheral beam 11 and is covered with a fireproof coating layer 17.
The blind box 13 is suspended and supported from the floor slab 12 on the upper floor.
The air conditioning outlet 14 is attached along the blind box 13. A duct 18 inserted through the sleeve 16 is connected to the air conditioning outlet 14.

A plurality of curtain walls 10 are attached side by side in the vertical direction and the horizontal direction to form an outer wall of the building 1. The curtain wall 10 is suspended and supported on the outer peripheral beam 11 of the building 1 via a fastener (not shown).
The curtain wall 10 is attached to a precast concrete sash frame concrete portion 20, a pair of sashes 30 attached to the sash opening 24 of the sash frame concrete portion 20, and an upper part of the sash frame concrete portion 20 on the inner side of the building. A plate-shaped fireproof material 40 is provided.
The sash frame concrete portion 20 includes an upper frame concrete portion 21 extending in the horizontal direction, a lower frame concrete portion 22 arranged below the upper frame concrete portion 21 and extending in the horizontal direction, and an upper frame concrete portion 21 extending in the vertical direction. It is provided with three quadrangular concrete portions 23 connecting both end sides and the central portion of the lower frame concrete portion 22 with both end sides and the central portion of the lower frame concrete portion 22.
The sash frame concrete portion 20 is formed with two sash openings 24 surrounded by an upper frame concrete portion 21, a lower frame concrete portion 22, and a mullion concrete portion 23. Further, the gap between the upper frame concrete portion 21 and the floor slab 12 is closed by the interlayer closing material 19.
The sash 30 is attached to each sash opening 24 of the sash frame concrete portion 20. Each sash 30 includes a rectangular aluminum sash frame 31 and a glass 32 attached to the inside of the sash frame 31.

FIG. 3A is a horizontal cross-sectional view of the upper part of the curtain wall 10. FIG. 3 (b) is a view taken along the line BB of the upper part of the curtain wall 10 of FIG. 3 (a). FIG. 4 is a cross-sectional view taken along the line CC of the upper part of the curtain wall 10 of FIG. 3 (a).
The refractory material 40 is a rectangular plate-shaped gypsum board, and a water repellent agent is applied to the surface as a measure against rainwater. The blind box 13 is in contact with the surface of the refractory material 40 on the inner side of the building. As the refractory material 40, it is preferable to secure heat-shielding property and flame-shielding property against the spread of fire in the event of a fire by using a material in which two layers of calcium silicate plates mixed with fibers having a thickness of 10 mm are laminated.
A notch 25 is formed at the lower end of the surface of the upper frame concrete portion 21 on the inner side of the building. The upper end surface and the surface on the outer side of the building of the refractory material 40 are locked to the notch portion 25, whereby the refractory material 40 is contained within the thickness of the upper frame concrete portion 21.

A support member 50 is attached to the surface of the mullion concrete portion 23 on the inner side of the building, and the refractory material 40 is supported by the support member 50.
The support member 50 is a first support that is attached to each base 51 and is attached to each base 51 to hold down the side end surface of the refractory material 40 and the surface on the inside of the building. A second support portion 53, which is attached between the base portions 51 and presses the lower end surface of the refractory material 40, the surface on the inner side of the building and the surface on the outer side of the building, is provided.
The base portion 51 is fixed to the upper frame concrete portion 21 by using insert bolts arranged in two upper and lower stages in the vertical direction. Further, the second support portion 53 is a 1.6 mm steel plate processed into a U shape.

The procedure for attaching the refractory material 40 to the sash frame concrete portion 20 is as follows.
First, the base portion 51 of the support member 50 is attached to the mullion concrete portion 23, and then the first support portion 52 is attached to the base portion 51. In this state, the plate-shaped refractory material 40 is inserted from below as shown by the white arrows in FIGS. 3 and 4. At this time, the refractory material 40 is guided by the first support portion 52, and is inserted until the upper end side of the refractory material 40 comes into contact with the cutout portion 25 of the upper frame concrete portion 21. After that, the second support portion 53 is attached to the base portion 51.

FIG. 5 shows a procedure for constructing a building using the curtain wall of the present invention shown above as an outer wall. First, at the factory, a curtain wall 10 made of precast concrete with a refractory material is manufactured. That is, the sash frame concrete portion 20 is constructed, the sash 30 is attached to the sash frame concrete portion 20, and the refractory material 40 is attached to the sash frame concrete portion 20 using the support member 50.

In step S1, the building frame is constructed. Specifically, at the construction site of the building 1, the steel frame member including the outer peripheral beam 11 is constructed, and then the floor concrete is placed to construct the floor slab 12.
In step S2, the curtain wall 10 is transported from the factory to the site, lifted by a lifting machine at the site, and attached to the outer peripheral beam 11 of the building frame. As a result, the fireproof material pre-attached curtain wall 10 to which the fireproof material is attached is attached to a predetermined position in the building 1.
In step S3, a fireproof coating layer is formed on the building frame other than the curtain wall 10. Specifically, the fireproof coating material is sprayed onto the steel frame member including the outer peripheral beam 11 to form the fireproof coating layer 17. Further, an interlayer closing material 19 is attached between the curtain wall 10 and the floor slab 12.
In step S4, interior work is performed. That is, the blind box 13 and the air-conditioning outlet 14 are attached, and then the ceiling material 15 is attached to construct the building 1.

According to this embodiment, there are the following effects.
(1) A refractory material 40 is attached to the inside of the building of the curtain wall 10 in advance, and the curtain wall 10 is lifted and attached to the outer peripheral beam 11 of the building 1 at the construction site of the building 1. In this way, by attaching the refractory material 40 to the curtain wall 10 in advance, even if the gap between the curtain wall 10 and the outer peripheral beam 11 is narrow, it is possible to prevent a decrease in workability and to build a building in a short construction period. 1 can be constructed.
(2) Since the refractory material 40 is locked to the notch 25 of the upper frame concrete portion 21 constituting the curtain wall 10, the refractory material 40 can be reliably positioned on the inside of the building of the curtain wall 10 and can be placed on the curtain wall 10. A large living space can be secured in the facing building.
Further, the refractory material 40 attached to the upper frame concrete portion 21 can prevent smoke and flame from wrapping around from below to above the curtain wall 10 in the event of a fire.
(3) The refractory material 40 was supported by a pair of mullion concrete portions 23 located beside the refractory material 40. In this way, by supporting the refractory material 40 at three points by the upper frame concrete portion 21 and the pair of mullion concrete portions 23, the support performance of the refractory material 40 by the sash frame concrete portion 20 can be improved, and the curtain due to an earthquake or the like. Even when an external force acts on the wall 10, it is possible to prevent the refractory material 40 from falling off. Further, the refractory material 40 can be easily and inexpensively fixed to the sash frame concrete portion 20 of the curtain wall 10 by the support member 50.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.
For example, in the above-described embodiment, the refractory material 40 is attached to the inside of the building of the sash frame concrete portion 20 and above the sash opening 24, but the shape and mounting position of the refractory material are not particularly limited. Not done. For example, the refractory material may be provided over the entire surface of the concrete portion of the sash frame on the inside of the building.
Further, in the curtain wall 10 made of precast concrete with a fireproof material, the fireproof material 40 is attached to the sash frame concrete portion 20 at the factory, but the present invention is not limited to this, and the curtain wall (sash) is not attached with the fireproof material 40. A fireproof material may be attached to the curtain wall after the sash 30 is attached to the frame concrete portion 20) and before the curtain wall is lifted at the construction site.

1 ... Building 10 ... Curtain wall 11 ... Outer beam 12 ... Floor slab 13 ... Blind box 14 ... Air conditioning outlet 15 ... Ceiling material 16 ... Sleeve 17 ... Fireproof coating layer 18 ... Duct 19 ... Interlayer closing material 20 ... Sash frame Concrete part 21 ... Upper frame concrete part 22 ... Lower frame concrete part 23 ... Square concrete part 24 ... Sash opening 25 ... Notch 30 ... Sash 31 ... Sash frame 32 ... Glass 40 ... Fireproof material 50 ... Support member 51 ... Base 52 … 1st support 53… 2nd support

Claims (3)

Precast concrete curtain wall
It is equipped with a precast concrete sash frame concrete part and a plate-shaped refractory material attached to the inside of the building of the sash frame concrete part .
The sash frame concrete portion includes an upper frame concrete portion extending in the horizontal direction, a lower frame concrete portion arranged below the upper frame concrete portion and extending in the horizontal direction, and the upper frame concrete portion extending in the vertical direction. It is equipped with a plurality of cubic concrete parts that connect to the lower frame concrete part.
The refractory material is attached below the concrete portion of the upper frame.
A curtain wall characterized in that the upper end side of the refractory material is locked to the concrete portion of the upper frame . A notch is formed on the inner surface of the upper frame concrete portion on the inner side of the building.
The upper end side of the refractory material is locked to the notch.
The curtain wall according to claim 1 , wherein the side end surface and the lower end surface of the refractory material are supported by a support member attached to the mullion concrete portion . The curtain wall according to claim 1 or 2 is provided as an outer wall, and the curtain wall is provided.
The curtain wall is a building characterized in that it is a precast concrete member to which the refractory material is attached .

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