JP5620128B2 - Composite fireproof structure for curtain wall and building - Google Patents

Description

  The present invention relates to a composite fireproof structure for a curtain wall and a building.

  According to the Building Standard Law, regarding curtain walls used for buildings exceeding a certain height and scale, the technical standards for exterior walls are required for the parts between windows on the upper and lower floors (hereinafter referred to as “spandrels”). It is required to provide an interlayer partition member with a height of 900 mm or more for the purpose of applying and preventing the spread of fire to the upper floor.

  In an aluminum curtain wall, a fireproof board is generally used as an interlayer partition member in a spandrel portion. This refractory board is made of soft material (brittle material) such as fiber mixed calcium silicate board, gypsum board, rock wool board, ceramic fiber board, etc. ).

  On the other hand, a steel frame beam or the like is required to have a fire resistance performance of 1 to 3 hours, and the outer peripheral surface of the beam or the like is provided with a fireproof coating such as spray rock wool or a fiber mixed calcium silicate plate.

However, when the gap between the fireproof board and the beam is small, it is difficult to provide a fireproof coating on the surface of the beam on the fireproof board side. When using materials such as PCa (precast concrete) plate, ALC panel, and extrusion-molded cement plate for the outer wall, the outer wall plate is used as part of the fireproof coating as a countermeasure. Is often used, and is generally called "composite fire resistance". However, aluminum curtain walls do not function as a fire-resistant coating because it becomes difficult to stably support the fire-resistant board when the aluminum frame that supports the fire-resistant board (stands and eyes) melts and burns out in the event of a fire. There is. For this reason, in order to establish composite fire resistance with an aluminum curtain wall, it is necessary to prepare a fireproof coating material separately from the fireproof board for the outer wall. For example, Patent Document 1 proposes a method in which a fireproof board for a beam is installed between a fireproof board for an outer wall and a steel beam, and the fireproof performance of the beam is secured by the fireproof board for the beam. In Patent Document 2, a fire-resistant paint is applied to a portion facing the outer wall of the steel beam in advance, so that the fire-resistant paint supplements the function of the fire-resistant coating after the outer wall fire-resistant board stops functioning. A method to ensure fire resistance is proposed.
On the other hand, if the fireproof board is directly supported by the building frame even after the aluminum frame is melted and burnt down by the fire, the fireproof board for the outer wall can be used as a component member of the composite fireproof.

  Here, as a method for supporting the fireproof board from the housing, for example, the one disclosed in Patent Document 3 is known. In the fireproof board support structure of Patent Document 3, as shown in FIG. 17, the peripheral portion of the fireproof board 100 is supported by an aluminum frame composed of a vertical 110 and a seamless 112. A vertical bracket 116 is fixed to the vertical 110 with a bolt 119. The vertical bracket 116 is arranged across the fireproof boards 100 that are horizontally adjacent to each other with the vertical 110 interposed therebetween, and bolts 118 are attached to insert nuts (not shown) embedded in the widthwise ends of the fireproof boards 100. It is fixed to the fireproof board 100 by tightening. On the other hand, a fastener 114 is fixed to the slab 102 on the indoor side of the building with a bolt 117, and a vertical bracket 116 is fixed to the fastener 114 with a bolt 120.

  However, since the support structure of the fireproof board of Patent Document 3 is configured to fix the vertical bracket 116 by fastening the bolt 118 to the insert nut embedded in the fireproof board 100, stress concentrates on the embedded portion of the insert nut. In addition, the embedded portion of the insert nut of the fireproof board 100 may be damaged or damaged. Therefore, when the aluminum frame that restrains the peripheral edge of the fireproof board is melted in the event of a fire, it becomes difficult to stably support the fireproof board 100, and it is difficult to use the fireproof board 100 supported by this method for combined fire resistance.

Japanese Patent Laid-Open No. 10-147993 JP-A-5-306554 JP-A-7-324415

  In view of the above facts, the present invention aims to improve the support performance of the fireproof board and to improve the fireproof performance.

The composite fireproof structure for a curtain wall according to claim 1 includes an interior side of a steel frame member that supports a fireproof board in which a through-hole is formed and a structural member in which the fireproof board is arranged with a gap on the outdoor side. Covering the facing surface, projecting from the steel member toward the fireproof board, and covering the gap between the steel member and the fireproof board, and attached to the upper part of the structural member, sandwiching both sides of the fireproof board Holding means, and the holding means is provided at the end of the female screw part, and is provided at the end of the female screw part, and is inserted into the through hole from the outside of the fireproof board so as to be able to come off. A first holding portion that protrudes from the portion in the radial direction of the female screw portion , contacts the surface of the fireproof board, a second holding portion that contacts the back surface of the fireproof board, and an attachment formed on the second holding portion Through the hole And a, a fastening bolt fastened to the female threaded portion.

  According to the invention which concerns on Claim 1, the surface which faces the room inner side of the steel member which supports a structural member with the fireproof means is covered. On the other hand, the surface of the steel member facing the outdoor side is covered with a fireproof board arranged with a gap from the structural member. Furthermore, the gap between the fireproof board and the steel frame member is closed by a fireproof means that projects from the steel member to the fireproof board. Thereby, the hot air and flame which flow into between a fireproof board and a steel frame member from the clearance gap between a fireproof board and a steel frame member at the time of a fire are suppressed. Therefore, since the fireproof coating material etc. which coat | cover the surface which faces the outdoor side of a steel frame member can be abbreviate | omitted, a workability improvement and cost reduction can be aimed at. In particular, the present invention is effective when the distance between the fireproof board and the steel frame member is narrow and it is difficult to provide a fireproof coating material or the like on the surface of the steel member facing the outdoor side.

Here, in the event of a fire, if the aluminum frame that restrains the periphery of the fireproof board is melted and the restraint of the periphery of the fireproof board by the aluminum frame is released, the surface facing the outdoor side of the steel member may be exposed . As a countermeasure, in the present invention, the holding means holds both sides of the fireproof board. This holding means has a female screw part. Then, by tightening the fastening bolt inserted through the mounting hole of the second holding portion into the female screw portion that is inserted from the outdoor side into the through hole of the fireproof board so as to be able to come off, both sides of the fireproof board are attached to the first holding portion and It is sandwiched between the second holding parts. By causing the first holding portion and the second holding portion to be in surface contact with both sides of the fireproof board and increasing the contact area with the fireproof board, the stress acting on the fireproof board is reduced. As a result, since the breakage and damage of the fireproof board are suppressed, the support performance of the fireproof board is improved. Therefore, as compared with the configuration without the holding means, the surface facing the outdoor side of the steel frame member is covered with the fireproof board for a long time, so that the fireproof performance is improved.

Moreover, since it is the structure which inserts an internal thread part in the through-hole formed in the fireproof board, workability improves compared with the structure which embeds an insert nut like the past (for example, patent document 3). Furthermore, since it is possible to omit the aluminum frame that restrains the peripheral edge of the fireproof board, cost reduction can be achieved.

The composite fireproof structure for a curtain wall according to claim 2, wherein the fireproof board and the fireproof means for covering the surface facing the room side of the steel member that supports the structural member in which the fireproof board is arranged on the outside of the room with a gap therebetween are provided. A holding means that is attached to the top of the structural member and holds both sides of the fireproof board; a fireproof plate material that projects from the steel member toward the fireproof board; and is fixed to the indoor side surface of the fireproof board And a joint material that extends in the width direction of the fireproof board and is brought into contact with a tip portion of the fireproof plate material in the extending direction.

According to the invention which concerns on Claim 2, the hot air and flame which flow between a fireproof board and a steel frame member from the clearance gap between a fireproof board and a fireproof board material by making the front-end | tip part of the extending direction of a fireproof board material contact a joint material. Etc. can be suppressed.

  The composite fireproof structure for a curtain wall according to claim 3 includes a fireproof board in which a through-hole is formed, and a steel frame member that supports a structural member in which the fireproof board is arranged on the outdoor side with a gap therebetween. Covering the facing surface, projecting from the steel member toward the fireproof board, and covering the gap between the steel member and the fireproof board, and attached to the upper part of the structural member, sandwiching both sides of the fireproof board Holding means, and the holding means protrudes in the radial direction of the female screw portion from the female screw portion and is in contact with the surface of the fireproof board. A first holding part; a second holding part that contacts a back surface of the fireproof board; and a fastening bolt fastened to the female screw part through an attachment hole formed in the second holding part, 1 holding part and front Between the surface of the refractory boards, and at least one of between the back surface of the refractory board and the second holding portion, the functional material is provided.
According to the invention which concerns on Claim 3, a fireproof board is provided by providing a functional material in at least one between the 1st holding | maintenance part and the surface of a fireproof board, and between a 2nd holding part and the back surface of a fireproof board. Can be suppressed.
The composite fireproof structure for a curtain wall according to claim 4 is the composite fireproof structure for a curtain wall according to any one of claims 1 to 3, wherein the composite fireproof structure is attached to the structural member and is more than the holding means. There is a regulating means that comes into contact with the indoor side surface of the fireproof board.
According to the invention which concerns on Claim 4, the inclination and rotation of the direction approaching the structural member of a fireproof board are suppressed by making a control means contact the room | chamber interior side surface of a fireproof board below a holding means. it can.

The composite fireproof structure for a curtain wall according to claim 5 is the composite fireproof structure for a curtain wall according to claim 1 or claim 3 , further comprising a joining means for joining the fireproof means and the fireproof board. .

According to the invention of claim 5 , by joining the fireproof means and the fireproof board by the joining means, hot air and flame flowing into the space between the fireproof board and the steel frame member through the gap between the fireproof means and the fireproof board in the event of a fire Etc. are suppressed. Accordingly, the fire resistance performance is improved.

The composite fireproof structure for a curtain wall according to claim 6 is the composite fireproof structure for a curtain wall according to claim 5 , wherein the joining means is attached to a front end portion of the fireproof means in the extending direction, and is attached to the fireproof boat. A frame to be joined; and a closing member that closes a gap between the distal end portion of the fireproof means and the frame.

According to the invention which concerns on Claim 6 , a fireproof means and a fireproof board can be joined by the simple structure of providing a flame | frame in the protrusion direction front-end | tip part of a fireproof means. Therefore, the workability is improved. Further, by closing the gap between the end of the refractory means in the projecting direction and the frame with a closing member, hot air, flame, and the like flowing into the space between the refractory board and the steel member during the fire are suppressed. Accordingly, the fire resistance performance is improved.

The composite fireproof structure for curtain walls described in claim 7 is the composite fireproof structure for curtain walls according to any one of claims 1 to 6 , wherein the fireproof means includes a fireproof plate material.

According to the invention which concerns on Claim 7 , a fiber mixed calcium silicate board, a gypsum board, a rock wool board, a ceramic fiber board etc. are used as a fireproof board material, for example. Since these fire-resistant plate materials are easy to handle, workability is improved.

The composite fireproof structure for a curtain wall according to claim 8 is the composite fireproof structure for a curtain wall according to any one of claims 1, 3, 5 and 6, wherein the fireproof means is formed from the steel member. It has the base material which protrudes toward a fireproof board, and the fireproof coating material sprayed on the said base material.

According to the invention which concerns on Claim 8 , cost reduction can be aimed at by using an inexpensive fireproof coating material as a fireproof means.

A composite fireproof structure for a curtain wall according to a ninth aspect is the composite fireproof structure for a curtain wall according to the eighth aspect , comprising waterproof means provided on the surface of the fireproof board.

According to the invention which concerns on Claim 9 , the water | moisture content which a fireproof board absorbs, for example at the time of construction of a fireproof coating material is reduced by providing a waterproof means on the surface of a fireproof board. Thereby, fogging of the window glass of the curtain wall facing the fireproof board is suppressed. Therefore, the appearance of the curtain wall is improved.

The composite fireproof structure for a curtain wall according to claim 10 is the composite fireproof structure for a curtain wall according to any one of claims 1 to 9 , wherein the fireproof means includes a wound fireproof covering material and a foamable fireproof sheet. Material or thermal expansion refractory sheet material.

According to the invention which concerns on Claim 10 , the required fireproof performance is securable by selecting suitably a wound fireproof covering material, a foamable fireproof sheet material, or a thermal expansion fireproof sheet material.

Building according to claim 11 is provided with a composite refractory structure for curtain wall according to any one of claims 1-10.

According to the invention according to claim 11, by providing a composite refractory structure for curtain wall according to any one of claims 1-10, for improving the supporting ability of the refractory board, increasing the fire resistance of the building be able to.

  Since this invention was set as said structure, the support performance of a fireproof board can be improved and fireproof performance can be improved.

It is the figure which looked at the curtain wall which concerns on one Embodiment of this invention from the outdoor side. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a perspective view which shows the holding means and regulation means which concern on one Embodiment of this invention. It is a figure equivalent to FIG. 4 which shows the modification of the fireproof means which concerns on one Embodiment of this invention. It is a figure equivalent to FIG. 4 which shows the modification of the fireproof means which concerns on one Embodiment of this invention. It is a figure equivalent to FIG. 4 which shows the modification of the fireproof means which concerns on one Embodiment of this invention. It is a perspective view which shows the modification of the base material which concerns on one Embodiment of this invention. It is a figure equivalent to FIG. 4 which shows the modification of the fireproof means which concerns on one Embodiment of this invention. It is a principal part enlarged view equivalent to FIG. 4 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a figure equivalent to FIG. 4 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a principal part enlarged view equivalent to FIG. 3 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a principal part enlarged view equivalent to FIG. 3 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a principal part enlarged view equivalent to FIG. 4 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a principal part enlarged view equivalent to FIG. 4 which shows the modification of the holding means which concerns on one Embodiment of this invention. It is a figure which shows a prior art.

  Hereinafter, a composite fireproof structure for a curtain wall according to an embodiment of the present invention will be described with reference to the drawings.

  First, the structure of the composite fireproof structure 10 for curtain walls will be described.

<Composition of curtain wall>
FIG. 1 shows a curtain wall 12 to which a composite fireproof structure 10 for a curtain wall is applied. The curtain wall 12 includes a plurality of vertices 14 standing in the horizontal direction at intervals, and a plurality of invisible lines 16 erected between the stances 14 at intervals in the vertical direction. These verticals 14 and the meshes 16 are made of aluminum and connected in a lattice shape, and a window glass 18 is disposed in the lattice frame.

  As shown in FIGS. 2 and 3, the upright 14 is disposed adjacent to the concrete slab (structural member) 20 and supported by the concrete slab 20 via the upright bracket 22 and the fastener 24.

  The vertical bracket 22 has an L-shaped cross section and is fixed to both side surfaces of the vertical 14 with bolts 26. The fastener 24 has an L-shaped cross section and is fixed to the upper surface of the concrete slab 20 with bolts 28. The curtain wall 12 is supported by the concrete slab 20 by fixing the vertical bracket 22 to the fastener 24 with bolts 30 and nuts 31. The concrete slab 20 is supported by a steel beam 32 (see FIG. 2).

  The spandrel between the upper floor window and the lower floor window of the curtain wall 12 is provided with a fireproof board 34 as an interlayer partition member. The fireproof board 34 is provided on the indoor side of the window glass 18 and is disposed in an aluminum frame surrounded by the vertical 14 and the mesh 16. The fireproof board 34 is composed of a fiber mixed calcium silicate board, a gypsum board, a rock wool board, a ceramic fiber board, and the like, and its peripheral part is disposed in a rail 36 provided on the vertical 14 and the mesh 16. ing. The rails 36 hold the fireproof board 34 with the concrete slab 20 and the gap D (see FIG. 2) therebetween.

<Configuration of holding means>
As shown in FIG. 4, the fireproof board 34 is supported by the concrete slab 20 via the holding means 40. The holding means 40 includes a nut member 42 attached to the fireproof board 34, an attachment member 44 attached to the upper surface of the concrete slab 20, and a fastening bolt 38 fastened to the nut member 42. For convenience of explanation, the outdoor side surface of the fireproof board 34 will be described as a front surface 34A, and the indoor side surface will be described as a back surface 34B.

  As shown in FIG. 5, the nut member 42 has a female screw portion 42A and a first holding portion 42B provided at an end of the female screw portion 42A. The female screw portion 42A has a cylindrical shape, and a female screw is cut inside thereof, so that a fastening bolt 38 can be fastened. The first holding portion 42B is a disc shape, is disposed coaxially with the female screw portion 42A, and protrudes from the end portion of the female screw portion 42A in a radial shape in the radial direction of the female screw portion 42A.

  On the other hand, through holes 48 are formed at both ends in the width direction of the fireproof board 34 to which the nut member 42 is attached. A counterbore 50 having a diameter larger than that of the through hole 48 is formed on the edge of the through hole 48 on the surface 34 </ b> A side of the fireproof board 34. The female screw portion 42A of the nut member 42 is inserted into the through hole 48 so as not to protrude from the back surface 34B of the fireproof board 34, and the first holding portion 42B of the nut member 42 is in surface contact with the bottom surface of the counterbore 50. It is stored in the state. The first holding portion 42B is stored in the spot facing 50 so as to be substantially flush with the surface 34A of the fireproof board 34. Thereby, the appearance of the fireproof board 34 from the outdoor side is improved.

  An attachment member 44 is provided at a position facing the nut member 42. The mounting member 44 is made of a steel plate having an L-shaped cross section, and projects from the upper surface of the concrete slab 20 toward the fireproof board 34. The attachment member 44 includes an attachment portion 44A attached to the concrete slab 20, and a second holding portion 44B bent upward along the fireproof board 34 from the projecting end of the attachment portion 44A. It arrange | positions in the state which made the 2nd holding | maintenance part 44B surface-contact with the back surface 34B. By tightening the fastening bolt 38 into the female screw portion 42A of the nut member 42 through the mounting hole 52 formed in the second holding portion 44B, the first holding portion 42B of the nut member 42 and the second holding of the mounting member 44 are retained. The front surface 34A and the back surface 34B of the held portion 34X (see FIG. 4) of the fireproof board 34 are held between the portion 44B and the portion 44B.

  The front surface 34 </ b> A and the back surface 34 </ b> B of the fireproof board 34 are concepts including a surface recessed from the front surface 34 </ b> A of the fireproof board 34, such as the bottom surface of the spot facing 50. Further, the held portion 34X of the fireproof board 34 means a portion of the fireproof board 34 sandwiched between the first holding portion 42B and the second holding portion 44B, and in the present embodiment, both ends in the width direction of the fireproof board 34. Are provided respectively. The held portion 34 </ b> X can be appropriately provided at a necessary portion of the fireproof board 34 according to the support conditions of the fireproof board 34.

  An attachment hole 54 is formed in the attachment portion 44 </ b> A of the attachment member 44, and the attachment member 44 is secured by tightening a bolt 56 penetrating through the attachment hole 54 into an anchor nut 58 embedded in the upper surface of the concrete slab 20. Is fixed to the upper surface of the concrete slab 20. The attachment hole 54 is a long hole extending in the extending direction (arrow A direction) of the attachment portion 44 </ b> A, and the gap D between the fireproof board 34 and the concrete slab 20 can be adjusted. The attachment hole 54 may be a long hole extending in a direction orthogonal to the extending direction of the attachment portion 44A.

<Composition of regulation means>
Further, as shown in FIG. 4, a regulating means 60 is attached to the concrete slab 20. The restricting means 60 is configured by bending a steel plate in a Z-shape, and has a mounting portion 60A, a facing portion 60B, and an overhang portion 60C. The attachment portion 60 </ b> A is disposed between the upper surface of the concrete slab 20 and the attachment portion 44 </ b> A of the attachment member 44, and is attached to the upper surface of the concrete slab 20 together with the attachment member 44.

  Specifically, a mounting hole 62 is formed in the mounting portion 60 </ b> A of the regulating means 60, and a bolt 56 penetrating through the mounting hole 62 and the mounting hole 54 of the mounting member 44 is embedded in the upper surface of the concrete slab 20. By tightening the anchor nut 58, the restricting means 60 and the attachment member 44 are fixed to the upper surface of the concrete slab 20. Further, the mounting hole 62 of the mounting portion 60A of the regulating means 60 is a long hole extending in the protruding direction (arrow A direction) of the protruding portion 60C described later, and adjusts the gap D between the fireproof board 34 and the concrete slab 20. It is possible. In addition, this attachment hole 62 is good also as a long hole extended in the direction orthogonal to the overhang | projection direction of 60 C of overhang | projection parts.

  An opposing portion 60B that is bent downward along the end surface of the concrete slab 20 from the end portion is provided at the end portion of the attachment portion 60A on the fireproof board 34 side. The facing portion 60 </ b> B is disposed in the gap D between the fireproof board 34 and the concrete slab 20 and faces the concrete slab 20.

  A projecting portion 60C that projects from the lower end portion toward the fireproof board 34 is provided at the lower end portion of the facing portion 60B. The overhanging portion 60C is disposed substantially horizontally so as to be substantially flush with the lower surface of the concrete slab 20, and the end portion of the overhanging direction (arrow A direction) is below the held portion 34X of the fireproof board 34 and the fireproof board 34. It is in contact with the back surface 34B. Thereby, the inclination and rotation (arrow B direction) of the direction which approaches the concrete slab 20 of the fireproof board 34 which used the nut member 42 or the attachment member 44 as a fulcrum are controlled.

  Further, a plate material 64 that closes the gap D between the fireproof board 34 and the concrete slab 20 is placed on the overhanging portion 60C. The plate material 64 is disposed along the gap D between the fireproof board 34 and the concrete slab 20, and is passed between the overhang portions 60 </ b> C of the adjacent regulating means 60. On this plate material 64, an interlayer sealing material 66 such as rock wool that fills the gap D between the fireproof board 34 and the concrete slab 20 is placed. The interlayer plug 66 suppresses hot air and flames flowing from the lower floor of the concrete slab 20 to the upper floor of the concrete slab 20 through the gap D between the fireproof board 34 and the concrete slab 20 in the event of a fire.

<Composition of fireproof means>
A steel beam (steel member) 32 that supports the concrete slab 20 is H-shaped steel, and includes a web 32A and upper and lower flanges 32B and 32C provided at upper and lower ends of the web 32A. Are arranged. The surface facing the indoor side of the steel beam 32 is covered with two refractory plate materials 150 and 152 as refractory means. As the refractory plate materials 150 and 152, similarly to the refractory board 34, a fiber mixed calcium silicate plate, a gypsum board, a rock wool board, and a ceramic fiber board can be used.

  The surface facing the room side of the steel beam 32 is a concept including the surface of the web 32A opposite to the fireproof board 34, the lower surface of the lower flange 32C, and the like. Further, the surface facing the outdoor side of the steel beam 32 is a surface facing the fireproof board 34 or the like. Further, for convenience of explanation, of the two openings formed between the upper flange 32B and the lower flange 32C, the opening facing the fireproof board 34 is defined as the outdoor opening 35, and the opening facing the opposite side of the fireproof board 34 is defined. The indoor side opening 37 will be described below.

  The fire-resistant plate material 150 is opposed to the fire-resistant board 34 with the steel beam 32 interposed therebetween, and is disposed across the upper flange 32B and the lower flange 32C of the steel beam 32, and closes the indoor opening 37 of the steel beam 32. The fireproof plate 150 is fixed to a nonflammable spacer 156 provided in the indoor opening 37 of the steel beam 32 by a fixing pin 154 such as a tapping screw or a nail.

  A fireproof plate material 152 is disposed below the steel beam 32. The refractory plate material 152 is arranged horizontally or substantially horizontally between the lower end portion of the refractory plate material 150 protruding downward from the steel beam 32 and the refractory board 34. One end portion of the refractory plate material 152 is abutted against the lower end portion of the refractory plate material 150 and is fixed to the refractory plate material 150 with a fixing pin 154. Further, a C-shaped angle 158 is attached to the lower flange 32C of the steel beam 32, and the center portion of the fireproof plate 152 is fixed to the nonflammable spacer 160 provided in the angle 158 by a fixing pin 154. ing. As a result, the refractory plate material 152 is held in a state of projecting from the steel beam 32 toward the refractory board 34, and the gap H between the refractory board 34 and the steel beam 32 is closed, leaving a gap h for absorbing construction errors. Yes. The angle 158 can be omitted as appropriate.

  On the other hand, the projecting direction (in the direction of arrow A) 152A of the fireproof plate material 152 is inserted between a pair of joint materials 162A and 162B fixed to the back surface 34B of the fireproof board 34 with fixing pins 154. These joint materials 162 </ b> A and 162 </ b> B are longitudinal members extending in the width direction of the refractory plate material 152, and block the gap h between the refractory board 34 and the refractory plate material 152. The joint material 162A, 162B suppresses hot air, a flame, and the like flowing between the fireproof board 34 and the steel beam 32 through the gap h between the fireproof board 34 and the fireproof plate material 152.

  In addition, as the joint material 162A, 162B, a fiber mixed calcium silicate board, a gypsum board, a rock wool board, a ceramic fiber board, etc. can be used like the fireproof board 34. In this embodiment, the two joint materials 162A and 162B are provided. However, at least one of the joint material 162A and the joint material 162B may be provided. Further, the joint materials 162A and 162B may be omitted, and the gap h between the fireproof board 34 and the fireproof board material 152 may be closed by bringing the fireproof board material 152 into contact with the back surface 34B of the fireproof board 34.

  Next, the effect | action of the composite fireproof structure 10 for curtain walls which concerns on one Embodiment is demonstrated.

  The surface of the steel beam 32 facing the indoor side is covered with two fireproof plate materials 150 and 152. On the other hand, the surface of the steel beam 32 facing the outdoor side is covered with a fireproof board 34. Further, the gap H between the fireproof board 34 and the steel beam 32 is blocked by a fireproof board material 152 protruding from the steel beam 32 to the fireproof board 34, leaving a gap h between the fireproof board 34 and the fireproof board material 150. Further, the gap h between the refractory plate material 152 and the refractory board 34 is closed with joint materials 162A and 162B. Thereby, the hot air and flame which flow in between the fireproof board 34 and the steel beam 32 from the clearance gap H between the fireproof board 34 and the steel beam 32 at the time of a fire are suppressed. Therefore, since the fireproof covering material etc. which coat | cover the surface facing the outdoor side, such as the outdoor side opening 35 of the steel beam 32, can be abbreviate | omitted, a workability improvement and cost reduction can be aimed at. In particular, this embodiment is effective when the gap H between the fireproof board 34 and the steel beam 32 is narrow and it is difficult to provide a fireproof coating material or the like on the surface facing the outdoor side of the steel beam 32.

  Furthermore, since the fire-resistant plate materials 150 and 152 as the fire-proof means are easy to handle, the workability is improved as compared with a configuration in which a fire-resistant coating of a spray system such as spray rock wool generally used is provided. To do.

  Here, since the uprights 14 and the meshes 16 of the curtain wall 12 that support the fireproof board 34 are generally made of aluminum, there is a risk of melting due to a temperature rise during a fire. When these verticals 14 and the mesh 16 are melted and the restraint of the peripheral portion of the fireproof board 34 by the rail 36 (see FIGS. 2 and 3) is released, the holding means 40 bears the entire weight of the fireproof board 34. Will be. As a result, the stress acting on the held portion 34X of the fireproof board 34 increases. Therefore, in the configuration in which the refractory board 34 is supported by the insert nut embedded in the refractory board 34 as in the past (for example, Patent Document 3), stress concentrates on the embedded portion of the insert nut, and the embedded portion is broken or damaged. There is a fear.

  On the other hand, in this embodiment, the holding means 40 holds the front surface 34A and the back surface 34B of the fireproof board 34. Specifically, by tightening the fastening bolt 38 through the mounting hole 52 formed in the second holding portion 44B of the mounting member 44 into the female screw portion 42A of the nut member 42 mounted on the fireproof board 34, the nut member Between the first holding portion 42B of 42 and the second holding portion 44B of the attachment member 44, the front surface 34A and the back surface 34B of the held portion 34X are sandwiched and held. Thereby, the stress acting on the front surface 34A and the back surface 34B of the held portion 34X is reduced, and the stress acting on the inner peripheral surface of the through hole 48 into which the female screw portion 42A of the nut member 42 is inserted is reduced. .

  In addition, when the fireproof board 34 vibrates due to an external force such as hot air at the time of a fire, wind, earthquake, or the like, stress is repeatedly applied to the held part 34X of the fireproof board 34. In the present embodiment, the first holding part 42B and the first holding part 42B 2 Since the holding portion 44B comes into surface contact with the front surface 34A and the back surface 34B of the held portion 34X of the fireproof board 34, the repeated stress is dispersed and transmitted to the held portion 34X. Accordingly, the stress acting on the held portion 34X of the fireproof board 34 is reduced.

  Thus, since the breakage and damage of the held portion 34X of the fireproof board 34 are suppressed, the support performance of the fireproof board 34 is improved. As a result, compared to the configuration without the holding means 40, the surface facing the outdoor side of the steel beam 32 is covered with the fireproof board 34 for a long time, so that the fireproof performance of the steel beam 32 is improved.

  Furthermore, since the stress acting on the held portion 34X of the fireproof board 34 is reduced, the strength and rigidity required for the held portion 34X can be kept small. Therefore, the material cost etc. of the fireproof board 34 can be reduced.

  Furthermore, since it is the structure which attaches the nut member 42 to the fireproof board 34 by inserting the internal thread part 42A in the through-hole 48 formed in the fireproof board 34, conventionally (for example, patent document 3), Compared to the structure in which the insert nut is embedded in the fireproof board, the labor for attaching the nut member 42 is reduced.

  By the way, in the configuration in which the fireproof board 34 is supported by the holding means 40 that protrudes from the concrete slab 20 toward the fireproof board 34 as in the present embodiment, the uprights 14 and the blanks 16 are melted by the temperature rise at the time of fire. When the restraint of the peripheral portion of the fireproof board 34 by the rail 36 is released, the mounting member 44 is bent by the weight of the fireproof board 34, or the fireproof board 34 around the nut member 42 is crushed. With the mounting member 44 or the nut member 42 as a fulcrum, the fireproof board 34 may tilt or rotate in a direction approaching the concrete slab 20 (in the direction of arrow B in FIG. 4).

  As a countermeasure, in the present embodiment, a restriction means 60 is provided on the concrete slab 20. The regulating means 60 has a projecting portion 60C projecting from the concrete slab 20 toward the fireproof board 34, and the projecting direction (in the direction of arrow A) of the projecting portion 60C is from the held portion 34X of the fireproof board 34. In addition, by contacting the lower surface 34B of the fireproof board 34 at the lower side, the inclination and rotation of the fireproof board 34 in the direction approaching the concrete slab 20 (arrow B direction) are suppressed. Thereby, the support performance of the fireproof board 34 at the time of a fire can be improved not only at all times.

  Moreover, since the inclination and rotation of the fireproof board 34 are suppressed by the restricting means 60, the rail 36 and the like that restrain the peripheral edge of the fireproof board 34 can be omitted. Accordingly, since the structure of the curtain wall 12 is simplified, the manufacturing cost can be reduced.

  Furthermore, the overhanging portion 60C of the restricting means 60 is disposed in the gap D between the fireproof board 34 and the concrete slab 20, and the plate material 64 and the interlayer plugging material 66 are supported by the overhanging portion 60C. Thus, by using the overhanging portion 60C as a support member for the interlayer plugging material 66, the support member for supporting the interlayer plugging material 66 can be omitted, so that cost reduction can be achieved.

  In addition, the fireproof board | plate material 152 can be functioned also as a control means. That is, the inclination and rotation of the fireproof board 34 in the direction approaching the concrete slab 20 (arrow B direction) can also be suppressed by the fireproof board material 152 in contact with the back surface 34B of the fireproof board 34. Thereby, since the control means 60 can be omitted, cost reduction can be achieved.

  Further, since the distance L (see FIG.) Between the holding means 40 for holding the fireproof board 34 and the support point of the fireproof plate material 152 as the restricting means is widened, that is, the length of the arm of the moment is increased, the fireproof board 34 Tilt and rotation can be efficiently suppressed.

  Moreover, in this embodiment, the attachment work of the holding means 40 and the control means 60 becomes easy by attaching the holding means 40 and the control means 60 to the upper surface of the concrete slab 20. This is because the attaching work of the holding means 40 and the regulating means 60 can be performed downward. Further, in order to fix the holding means 40 and the regulating means 60 to the upper surface of the concrete slab 20 with one bolt 56, the holding means 40 and the regulating means 60 are compared with a configuration in which the holding means 40 and the regulating means 60 are separately mounted. This reduces the labor of mounting the work. Therefore, the workability is improved.

  Thus, by providing the curtain wall composite fireproof structure 10 according to the present embodiment, the fireproof board 34 can be prevented from being damaged and damaged, and the fireproof board 34 can be prevented from tilting and rotating in the event of a fire. Support performance is improved. As a result, the fireproof performance of the steel beam 32 is improved.

  Next, a modification of the composite fireproof structure for curtain walls according to an embodiment will be described.

  As shown in FIG. 6 and FIG. 7, the fireproof board 34 and the projecting direction tip portion 152 </ b> A of the fireproof plate material 152 may be joined by a joining means. Specifically, a frame 166 is attached to the projecting end portion 152A of the fireproof plate material 152. The frame 166 is a steel plate having a C-shaped cross section and is a longitudinal member extending in the width direction of the refractory plate material 152. The frame 166 is not shown in a state in which the protruding portion 152A of the refractory plate material 152 is inserted into the C-shaped opening 166B. It is attached to the overhanging end portion 152A with a pin or the like.

  A plurality of bolt holes 168 aligned in the longitudinal direction of the frame 166 are formed in the bottom wall 166A of the frame 166. The fireproof board 34 and the fireproof plate material 152 are joined by tightening the joining bolt 172 (joining means) into the insert nut 170 (joining means) embedded in the back surface 34B of the fireproof board 34 through the bolt hole 168.

  As shown in FIG. 7, a closing member 174 is provided in the opening 166 </ b> B of the frame 166. The closing member 174 is a longitudinal member extending in the width direction of the fireproof plate material 152 and is disposed between the head of the joining bolt 172 and the end surface of the fireproof plate material 152. The closing member 174 closes the gap between the frame 166 and the refractory plate material 152, and the hot air, flame, and the like flowing between the refractory board 34 and the steel beam 32 during a fire are suppressed from the gap. The end face of the fireproof plate 152 may be provided with a heat-expandable fireproof rubber tape or an inorganic fireproof paint to enhance the fire resistance.

  In this way, by joining the frame 166 and the fireproof board 34 attached to the fireproof board 152 by the joining bolt 172 and the insert nut 170 as joining means, the fireproof board 34 and the fireproof board 34 can be removed from the gap between the fireproof board 34 and the frame 166 in the event of a fire. Hot air, flames, etc. flowing into the steel beam 32 are suppressed. Further, by closing the gap between the end face of the refractory plate 152 and the frame 166 with the closing member 174, hot air, flame, etc. flowing into the space between the refractory board 34 and the steel beam 32 in the event of a fire are suppressed. Accordingly, the fire resistance performance is improved.

  Further, the fire-resistant plate material 152 and the fire-resistant board 34 can be joined by a simple configuration in which the frame 166 is provided at the end portion 152A of the fire-resistant plate material 152 in the extending direction. Therefore, the workability is improved.

  Next, a modified example of the fireproof means will be described.

  FIG. 8 shows a steel plate 176 and a fireproof coating material 178 as fireproof means. The steel plate 176 as the base material has one end joined to the lower flange 32C of the steel beam 32 by welding or the like, the other end projects from the steel beam 32 toward the fireproof board 34, and contacts the back surface 34B of the fireproof board 34. ing. The surface of the steel plate 176 and the steel beam 32 facing the outdoor side is provided with a spray-type fireproof coating material 178 such as spray rock wool.

  Thus, cost reduction can be achieved by using an inexpensive fireproof covering material 178 as the fireproof means.

  Further, the front surface 34A and the back surface 34B of the fireproof board 34 are coated with a water repellent material 180 as a waterproof means. Here, the fireproof board 34 has high water absorption, and there is a risk of absorbing moisture during the spraying of the fireproof coating material 178. When this moisture evaporates and dew forms on the window glass 18 of the curtain wall 12, the window glass 18 becomes cloudy and the appearance of the curtain wall 12 deteriorates, and a drainage channel for condensation is required on the curtain wall 12. Twelve structures are complicated.

  On the other hand, in this modification, the amount of moisture absorbed by the fireproof board 34 is reduced by coating the front surface 34A and the rear surface 34B of the fireproof board 34 with the water repellent material 180. Therefore, fogging of the window glass 18 is suppressed, and a dew passage for condensation can be omitted, so that the structure of the curtain wall 12 can be simplified.

  In addition, as shown in FIG. 9, a lath 182 such as a metal lath or an angle lath may be used as the base material. The lath 182 is placed on a plurality of bar reinforcing bars 184 fixed to the lower flange 32C of the steel beam 32 by welding or the like. A fireproof coating material 178 (see FIG. 8) is sprayed on the lath 182. The steel plate 176 and the lath 182 as the base material can also function as a restricting means for restricting the inclination and rotation of the fireproof board 34 described above.

Moreover, as a fireproof means, as shown in FIG. 10, you may use the wound fireproof coating material 186 which shape | molded rock wool, ceramic wool, etc. in the sheet form. The wound fireproof covering material 186 is disposed over the upper flange 32B and the lower flange 32C of the steel beam 32 so as to cover the surface of the steel beam 32 facing the room side, and along the lower flange 32C of the steel beam 32. It is bent in the horizontal direction and protrudes toward the fireproof board 34 from the lower flange 32C. The wound fireproof covering material 186 closes the gap H between the fireproof board 34 and the steel beam 32.
The wound fireproof covering material 186 is fixed to the steel beam 32 and the fireproof board 34 with fixing pins such as tapping screws and nails (not shown).

  Since the wound fireproof covering material 186 has high flexibility, it can be wound according to the shape of the steel beam 32. Therefore, the workability is improved.

In addition, although illustration is abbreviate | omitted, it may replace with the wound fireproof covering material 186, and may use a foamable fireproof sheet material or a thermal expansion fireproof sheet material. By appropriately selecting these wrapping fireproof covering material 186, foamable fireproof sheet material, or thermal expansion fireproof sheet material, the required fireproof performance can be ensured.
Moreover, you may use suitably combining the above-mentioned fireproof board | plate material 150,152, the fireproof coating material 178, the wound fireproof coating material 186, a foaming fireproof sheet material, and a thermal expansion fireproof sheet material.

  Next, a modified example of the holding means will be described.

  As shown in FIG. 11, a decorative plate 92 made of the same material as the fireproof board 34 may be arranged in the spot facing 50 formed on the fireproof board 34 to close the spot facing 50. Thereby, since the nut member 42 is hidden by the decorative board 92, the appearance of the fireproof board 34 is improved.

  Further, between the through hole 48 of the fireproof board 34 and the female screw portion 42A of the nut member 42, between the bottom surface of the spot facing 50 and the first holding portion 42B, the back surface 34B of the fireproof board 34 and the second holding portion 44B. Between them, a functional material such as an adhesive, a cushioning material, or a seal member may be provided.

  Here, since the bonding strength between the fireproof board 34 and the nut member 42 is increased by providing an adhesive as the functional material, the support strength of the fireproof board 34 is improved. Moreover, since the nut member 42 is prevented from falling off when the fireproof board 34 is conveyed, the workability is improved.

  In addition, as an adhesive agent, it can be used regardless of an organic type inorganic type. In the case of an organic system, a surface treatment (sealer treatment) on the fiber-mixed calcium silicate plate is required. Of the inorganic adhesives, it is desirable to use ceramic or sodium silicate based on fire resistance, and sodium silicate is generally used for fiber-mixed calcium silicate plates.

  Further, by providing the cushioning material or the seal member as the functional material, rattling of the fireproof board 34 is suppressed, and the shock absorbing board 34 or the seal member absorbs an impact on the fireproof board 34, so that the support performance of the fireproof board 34 is improved. improves.

  In addition, as a shock absorbing material, natural rubber, synthetic rubber, a viscoelastic body, etc. can be used, for example. In addition, as the sealing member, for example, a silicon-based filler, a thermally expandable refractory filler, or a molded product thereof can be used. Further, examples of the molded product of the thermally expandable refractory material include a rubber material and a sponge material.

  Moreover, in the said embodiment, although the attachment member 44 was directly attached to the upper surface of the concrete slab 20, it is not restricted to this. For example, as shown in FIG. 12, the attachment member 44 may be attached to the concrete slab 20 via an adjustment member 94 for adjusting the attachment height. The adjustment member 94 is formed by bending a steel plate in a Z shape, and has an attachment portion 94A and a connection portion 94B having different heights. The adjustment member 94 is arranged such that its attachment portion 94A is overlapped on the attachment portion 60A of the regulating means 60 and the connection portion 94B projects from the concrete slab 20 toward the fireproof board 34.

  A mounting hole 96 is formed in the mounting portion 94 </ b> A, and a bolt 56 penetrating through the mounting hole 96 and the mounting hole 62 of the mounting portion 60 </ b> A of the restricting means 60 is attached to an anchor nut 58 embedded in the upper surface of the concrete slab 20. By tightening, the adjusting member 94 and the regulating means 60 are fixed to the upper surface of the concrete slab 20.

  Further, the attachment hole 96 of the attachment portion 94A of the adjustment member 94 is a long hole extending in the protruding direction (arrow A direction) of the connecting portion 94B, and the gap D between the fireproof board 34 and the concrete slab 20 (see FIG. 2). ) Is adjustable. In addition, this attachment hole 96 is good also as a long hole extended in the direction orthogonal to the overhanging direction of the connection part 94B.

  An attachment portion 44A of the attachment member 44 is overlaid on the connecting portion 94B disposed at a position higher than the attachment portion 94A with respect to the concrete slab 20. A through hole 98 is formed in the connecting portion 94B, and the connecting portion 94B and the attaching portion 44A are connected by a bolt 121 and a nut 122 that pass through the through hole 98 and the attaching hole 54 of the attaching portion 44A.

  Thus, the attachment height of the fireproof board 34 can be adjusted by attaching the attachment member 44 to the concrete slab 20 via the adjustment member 94. Thereby, since the construction error of the curtain wall 12 and the construction error of the concrete slab 20 can be absorbed by the adjusting member 94, the workability is improved.

  Furthermore, as shown in FIG. 13, the attachment member 44 may be attached to the concrete slab 20 via the fastener 24 that supports the fireproof board 34. An angle 124 having an L-shaped cross section is arranged on the fastener 24. The angle 124 is disposed substantially in parallel with the fireproof board 34, and both ends of the angle 124 project from the fastener 24 to both sides in the horizontal direction.

  The angle 124 is fixed to the upper surface of the concrete slab 20 together with the fastener 24 by a bolt 28 that fixes the fastener 24 to the concrete slab 20. Attachment portions 44A of the attachment member 44 are attached to both ends of the angle 124. The attachment member 44 is disposed so as to be substantially orthogonal to the angle 124, and the attachment portion 44 </ b> A is overlapped with both ends of the angle 124. Connection holes (not shown) are formed at both ends of the angle 124, and the attachment members 44 are connected by connection bolts 126 and nuts (not shown) that pass through the connection holes and the attachment holes 54 of the attachment portion 44A. It is fixed to the angle 124. The attachment member 44 is projected from the angle 124 toward the fireproof board 34 and is disposed in a state where the second holding portion 44B is in contact with the back surface 34B of the fireproof board 34.

  Thus, by attaching the attachment member 44 via the fastener 24, the anchor nut 58 (see FIG. 4) embedded in the concrete slab 20 can be omitted, so that the labor of the attachment work is reduced. Therefore, the workability is improved.

  Further, the shape of the attachment member 44 is not limited to the L-shaped cross section. For example, as shown in FIG. 14, an attachment member 140 having a Z-shaped cross section may be used. The attachment member 140 is attached to the upper surface of the concrete slab 20 via an angle 142. The angle 142 has an L-shaped cross section, a mounting portion 142A provided at one end thereof is fixed to the upper surface of the concrete slab 20 with a bolt 144, and a connecting portion 142B provided at the other end is connected from the concrete slab 20 to the fireproof board 34. It is arranged in a state of projecting toward.

  The attachment member 140 is configured by bending a steel plate in a Z-shape, and has an attachment portion 140A and a second holding portion 140B having different heights, and the longitudinal direction thereof is arranged in the horizontal direction. The mounting member 140 has its mounting portion 140A overlapped with the connecting portion 142B of the angle 142, and the second holding portion 140B disposed on the fireproof board 34 side of the mounting portion 140A is in surface contact with the back surface 34B of the fireproof board 34. In this state, it is supported by the angle 142. An attachment hole 146 and a through hole (not shown) are formed in the attachment part 140A and the connecting part 142B of the angle 142, respectively, and are attached by bolts 148 and nuts 149 that pass through the attachment hole 146 and the through hole. Part 140A is connected to connecting part 142B.

  The mounting hole 146 formed in the mounting portion 140A of the mounting member 140 is a long hole extending in a direction orthogonal to the protruding direction of the angle 142 (direction of arrow A), and the horizontal direction of the angle 142 and the fireproof board 34 It is possible to absorb construction errors, etc. The mounting hole 146 may be a long hole extending in the vertical direction. Similarly, the through hole formed in the connecting portion 142B of the angle 142 may be a long hole.

  A mounting hole 145 is formed in the second holding portion 140B in surface contact with the back surface 34B of the fireproof board 34, and a fastening bolt 38 is attached to the female thread portion 42A (see FIG. 4) of the nut member 42 through the mounting hole 145. By tightening, the held portion 34X of the fireproof board 34 is held.

  Thus, the shape of the attachment member 140 and the direction in which it can be arranged can be changed as appropriate. Further, by making the longitudinal direction of the mounting member 140 horizontal, it is possible to easily absorb construction errors in the horizontal direction between the concrete slab 20 and the fireproof board 34.

  Moreover, in the said embodiment, although the attachment member 44 was attached to the upper surface of the concrete slab 20, it is not restricted to this. The attachment member 44 should just be attached to the upper part of the concrete slab 20, for example, may be attached to the upper part of the end surface of the concrete slab 20. As shown in FIG.

  Furthermore, in the said embodiment, although the nut member 42 was attached to the fireproof board 34, it is not restricted to this. The holding means 40 only needs to be able to hold the front surface 34A and the back surface 34B of the held portion 34X of the fireproof board 34, that is, any structure that holds the fireproof board 34 from both sides in the thickness direction of the fireproof board 34. For example, as shown in FIG. 15, a contact plate 128 as a first holding portion is brought into surface contact with the surface 34A of the fireproof board 34, and the held portion is interposed between the contact plate 128 and the second holding portion 44B. The front surface 34A and the back surface 34B of 34X may be sandwiched.

  Specifically, through holes 130 and 132 are formed in the holding portion 34X of the contact plate 128 and the fireproof board 34, respectively, and pass through the through holes 130 and 132 and the mounting holes 52 of the second holding portion 44B. The front surface 34 </ b> A and the back surface 34 </ b> B of the held portion 34 </ b> X of the fireproof board 34 are sandwiched by narrowing the distance between the contact plate 128 and the second holding portion 44 </ b> B by the bolt 134 and the nut 136. Thereby, the effect similar to the holding means 40 which concerns on the said embodiment can be acquired.

  Further, in the nut member 42 according to the above-described embodiment, the first holding portion 42B is provided at the end of the female screw portion 42A. For example, a plurality of female screw portions 42A may be provided in the disc-shaped first holding portion 42B having a large diameter. Thereby, since the stress which acts on the to-be-held part 34X of the fireproof board 34 is further disperse | distributed, the failure | damage and damage of the to-be-held part 34X of the fireproof board 34 are suppressed. Further, the first holding portion 42B is not limited to a disc shape, and may be a rectangle.

  In addition, as shown in FIG. 16, the plate member 64 may be omitted, and the interlayer plug 66 may be directly supported by the overhanging portion 60C. In this configuration, the overhang portion 60C may be formed in a plate shape along the gap D (see FIG. 2).

  Moreover, the composite fireproof structure for curtain walls according to the above-described embodiment is not limited to the steel beam 32 but can be applied to a steel column. Moreover, it is applicable not only to the concrete slab 20 but also to a deck composite slab, a deck composite slab, or a deck structure slab. In addition, the fire-resistant board 34 and the fire-resistant board materials 150 and 152 are not limited to soft materials (brittle materials) such as fiber-mixed calcium silicate board, gypsum board, rock wool board, ceramic fiber board, PC board, ALC panel, extrusion It is also possible to apply to hard materials such as molded cement boards.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to such Embodiment, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

10 Curtain Wall Composite Fireproof Structure 20 Concrete Slab (Structural Member)
32 Steel beams (steel members)
34 Fireproof board 38 Fastening bolt (holding means)
40 holding means 42 nut member (holding means)
42A Female thread (holding means)
42B 1st holding | maintenance part (holding means)
44B 2nd holding | maintenance part (holding means)
48 through hole 52 mounting hole 128 contact plate (first holding means)
134 bolts (holding means)
136 Nut (holding means)
140B Second holding part (holding means)
150 Refractory plate material (refractory means)
152 Refractory plate material (refractory means)
152A Projection direction tip 166 Frame (joining means)
170 Insert nut (joining means)
172 Joining bolt (joining means)
174 Closure member (joining means)
176 Steel plate (base material, fireproofing means)
178 Fireproof coating (fireproof means)
180 Water repellent material (waterproof means)
182 Lath (base material, fireproof means)
186 Wrapped fireproof coating (fireproof means)

Claims (11)

A fire-resistant board with a through hole,
Covering the surface facing the room side of the steel member that supports the structural member on which the fireproof board is arranged with a gap on the outdoor side, projects from the steel member toward the fireproof board, and the steel member and the fireproof board Fire-resistant means to close the gap between
A holding means attached to the top of the structural member and holding both sides of the fireproof board;
With
The holding means is
A female screw portion inserted so as to be able to fall out from the outdoor side of the fireproof board into the through hole ;
A first holding portion provided at an end portion of the female screw portion , protruding in a radial direction of the female screw portion from the end portion , and contacting a surface of the fireproof board;
A second holding portion that contacts the back surface of the fireproof board;
A fastening bolt fastened to the female screw portion through an attachment hole formed in the second holding portion;
A composite fireproof structure for curtain walls. Fireproof board,
Fireproof means for covering a surface of the steel member that faces the indoor side of the steel member that supports the structural member on which the fireproof board is arranged with a gap on the outdoor side;
A holding means attached to the top of the structural member and holding both sides of the fireproof board;
A fire-resistant plate material projecting from the steel member toward the fire-resistant board;
A joint material fixed to the indoor side surface of the refractory board, extending in the width direction of the refractory board, and being in contact with the tip of the refractory plate material in the extending direction;
A composite fireproof structure for curtain walls. A fire-resistant board with a through hole,
Covering the surface facing the room side of the steel member that supports the structural member on which the fireproof board is arranged with a gap on the outdoor side, projects from the steel member toward the fireproof board, and the steel member and the fireproof board Fire-resistant means to close the gap between
A holding means attached to the top of the structural member and holding both sides of the fireproof board;
With
The holding means is
A female screw portion inserted into the through hole;
A first holding portion that protrudes in a radial direction of the female screw portion from the female screw portion and contacts a surface of the fireproof board;
A second holding portion that contacts the back surface of the fireproof board;
A fastening bolt fastened to the female screw portion through an attachment hole formed in the second holding portion;
Have
A composite fireproof structure for a curtain wall provided with a functional material between at least one of the first holding part and the surface of the fireproof board and between the second holding part and the back surface of the fireproof board. .   The composite fireproof for curtain walls according to any one of claims 1 to 3, further comprising a restricting means attached to the structural member and in contact with a room-side surface of the fireproof board below the holding means. Construction.   The composite fireproof structure for a curtain wall according to claim 1 or 3, further comprising joining means for joining the fireproof means and the fireproof board. The joining means is
A frame attached to the projecting direction tip of the fireproof means and joined to the fireproof boat;
A closing member that closes a gap between the frame and the front end of the fireproof means in the overhang direction;
The composite fireproof structure for a curtain wall according to claim 5, wherein:   The composite fireproof structure for a curtain wall according to any one of claims 1 to 6, wherein the fireproof means includes a fireproof plate material. The refractory means is
A base material projecting from the steel member toward the fireproof board;
A fireproof coating material sprayed on the base material;
The composite fireproof structure for a curtain wall according to any one of claims 1, 3, 5, and 6.   The composite fireproof structure for a curtain wall according to claim 8, further comprising waterproof means provided on a surface of the fireproof board.   The composite fireproof structure for a curtain wall according to any one of claims 1 to 9, wherein the fireproof means includes a wound fireproof covering material, a foamable fireproof sheet material, or a thermal expansion fireproof sheet material.   A building comprising the composite fireproof structure for a curtain wall according to any one of claims 1 to 10.

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