JP2011102479A - Fireproof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fireproof structure, configured so that a refractory layer can be suitably set on a surface of an FRP structure with simplified attachment and detachment operations thereof to reduce the construction man-hours. <P>SOLUTION: The fireproof structure 1 includes the refractory layer 4 formed of inorganic cotton-like fiber, which is provided on at least part of the surface of the FRP structure 2. A support shaft 12 is embedded in and joined to the FRP structure 2, and the refractory layer 4 is held and fixed by the support shaft 12 and a screw member 16 screwed to the support shaft 12. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a fireproof structure in which a fireproof layer is provided on at least a part of the surface of an FRP structure.

In particular, when a large-sized structure is configured as the fireproof structure, it is necessary to ensure strength and rigidity while ensuring lightness. For this reason, the thing of the sandwich structure where the FRP layer is arrange | positioned on both surfaces of a core material is used (for example, refer patent document 1).
Further, a fireproof structure is also known which is integrally formed by laminating an inorganic foam or an inorganic mat on at least one side of an FRP material constituting a part thereof (see, for example, Patent Document 2).

  The fire-resistant structure according to Patent Document 1 uses an FRP structure as its main component, and, for example, when a roofing material is configured as a large building material, the FRP roof has high rigidity while being lightweight. By giving it, the space between the columns and the beams is increased to secure the space.

  The FRP roofing material uses a refractory layer in order to maintain the performance at the time of fire. This refractory layer may be either a single layer or a multilayer structure, and as a method for fixing the refractory layer in the multilayer structure (sandwich structure), methods such as tapping, adhesive, belt fixing, and fixing pins are adopted. .

  Since the fireproof structure according to Patent Document 2 is a laminated layer of an inorganic foam or an inorganic mat, it is thermally insulated and protected from a heat source by being integrally fixed by bonding, adhering, fusing, sewing, etc. It is stable and form protected without lowering, softening or burning.

JP 2001-254456 A Japanese Patent No. 3882338

  In the fire-resistant structure according to Patent Document 1, a sandwich structure is configured by penetrating and fixing FRP plate members disposed on both surfaces of the core material using bolts, rivets, and tapping screws when fixing the fire-resistant layer. .

  In the fireproof structure according to Patent Document 2, an inorganic foam or an inorganic mat is laminated and disposed on at least one surface of the FRP material, and is integrally fixed by bonding, adhering, fusing, sewing, or the like.

  Therefore, in the fixing method of the refractory layer according to Patent Document 1, in order to form a sandwich structure, bolts, rivets, and tapping screws (hereinafter referred to as stoppers) are integrally fixed through the FRP plate materials on both surfaces of the core material. Since the method is employed, when a bolt is used, the tip of the penetrating stopper protrudes from the back surface of the FRP plate material. For example, when the back side of the FRP plate material is used as a decorative plate or the like, the front end of the stopper projecting from the flat back side FRP plate material not only gets in the way, but the appearance of the wall surface is impaired. . In addition, when a tapping screw or the like is used as a stopper, there is a problem that it is difficult to remove the fireproof layer and the pullout strength is lowered.

  Moreover, in the fixing method of the refractory layer according to Patent Document 2, an inorganic foam or an inorganic mat is laminated and arranged on at least one surface of the FRP material, and is integrally fixed using an adhesive or the like. As the resin burns or decomposes, the refractory layer tends to fall off, and even if a heat-resistant adhesive is used, bonding is required over a wide area, thus increasing the number of construction steps. .

  The present invention has been made in view of the above-described circumstances, and it is possible to suitably install a fireproof layer on the surface of the FRP structure, and it is easy to attach and remove the fireproof layer and to reduce the number of construction steps. An object is to provide a structure.

The fireproof structure according to the present invention employs the following means in order to solve the above problems.
The fireproof structure according to the present invention is a fireproof structure in which a fireproof layer made of inorganic cotton-like fibers is provided on at least a part of the surface of the FRP structure, and a support shaft is embedded in the FRP structure. The fireproof layer is sandwiched and fixed by the support shaft body and a screw member screwed to the support shaft body.

  According to the present invention, the fire-resistant layer can be sandwiched and fixed without screwing the support member into the FRP structure by screwing the screw member into the support shaft that is embedded and joined to the FRP structure. Thereby, the surface of the FRP structure which a support shaft does not protrude can be used as a decorative board. Moreover, by attaching / detaching the screw member to / from the support shaft body, it is easy to attach and remove the fireproof layer, and the number of construction steps for the fireproof structure can be reduced.

  The fire-resistant structure according to the present invention is a fire-resistant structure in which a fire-resistant layer made of inorganic cotton-like fibers is provided on at least a part of the surface of the FRP structure, and a support shaft body is provided on the surface of the FRP structure. And the fireproof layer is sandwiched and fixed by the support shaft body and a screw member screwed to the support shaft body.

  According to the present invention, the screw member is screwed to the support shaft body joined to the surface of the FRP structure, whereby the support shaft body can sandwich and fix the refractory layer without penetrating the FRP structure. This not only facilitates the attachment and removal of the refractory layer, but also eliminates the need for bonding over a large area, thus reducing the number of construction steps for the refractory structure and using a heat-resistant adhesive. Therefore, it is possible to prevent the fireproof layer from falling off during a fire.

The support shaft has a flange at one end, and the flange is joined to the FRP structure.
Accordingly, by joining the flange portion of the support shaft body to the FRP structure, the screw member (nut) is screwed to the screw provided at the other end of the support shaft body, and the fireproof layer is sandwiched and fixed. Attaching and removing the fireproof layer can be performed easily.

The support shaft body is made of ceramics or a ceramic composite material.
Thereby, it has heat resistance and mechanical strength by using ceramics or a ceramic composite material for the support shaft. As a result, it is possible to prevent the fire-resistant layer from falling off during a fire.

The support shaft body is made of a phenol resin, a polyimide resin, or an epoxy resin.
As a result, the support shaft body is integrally formed of a resin having high heat resistance, so that the fireproof layer can be prevented from falling off during a fire.

An adhesive or a caulking material is used for joining the support shaft body and the FRP structure.
Thereby, for example, the inorganic adhesive has heat resistance that can withstand a high temperature of 1400 ° C. and has excellent workability, so that the workability is good and the holding of the fire-resistant layer is stable during a fire. It can also be used in places where corrosion resistance, abrasion resistance, and organic solvents are required.
In addition, by using a caulking material that is a putty-like filler such as a silicone resin or polymer latex as a sealing material for joining the support shaft body, it has properties that are lightweight and have excellent heat insulation and heat resistance. The fireproof layer is maintained stably in the event of a fire.

  According to the present invention, when the FRP structure is joined by the support shaft, the screw member is screwed into the support shaft embedded and joined in the FRP structure, so that the support shaft does not penetrate the FRP structure and the refractory layer is formed. Can be clamped and fixed. Thereby, the surface side of the FRP structure in which the support shaft does not protrude can be used effectively as a decorative board or the like. In addition, since the work of attaching and removing the refractory layer is simplified, the number of man-hours for constructing the refractory structure can be reduced. Furthermore, by using a heat-resistant support shaft and an adhesive, it is possible to prevent the fire-resistant layer from falling off during a fire.

It is sectional drawing of the fireproof structure which concerns on 1st embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 2nd embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 3rd embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 4th embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 5th embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 6th embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 7th embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 8th embodiment of this invention. It is sectional drawing of the fireproof structure which concerns on 9th embodiment of this invention.

Hereinafter, an embodiment of a fireproof structure according to the present invention will be described with reference to the drawings.
FIG. 1 shows a cross-sectional view of the refractory structure according to the first embodiment. 1, the fireproof structure 1 according to the first embodiment is an FRP structure 2 having a sandwich structure in which a core material 10 is disposed between two FRP materials 6 and 8 and the FRP materials 6 and 8. Composed.

  The FRP materials 6 and 8 are not limited to reinforcing fibers and matrix resins, but carbon fibers, glass fibers, aramid fibers, and the like can be used as the reinforcing fibers. Further, as the matrix resin, various thermoplastic resins can be used in addition to thermosetting resins such as epoxy resins, phenol resins, unsaturated polyester resins, and vinyl ester resins. Among these, it is preferable to use a phenol resin excellent in fire resistance.

  As the core material 10, wood, foam, honeycomb, or the like can be used, and a foam having a small specific gravity is more preferable from the viewpoint of lightness. In particular, the use of the core material 10 can improve not only rigidity but also heat insulation and sound insulation. When importance is attached to fire resistance, a phenol resin excellent in fire resistance can be used.

  The FRP structure 2 extends in the longitudinal direction with a constant width and the cross-sectional shape also extends substantially constant or extends in the longitudinal direction. You can also

  On at least a part of the surface of the FRP structure 2, a fireproof layer 4 made of inorganic cotton-like fibers is sandwiched and attached by an insert 12 to be described later and a screw member 16 screwed into the insert 12. For the cotton-like fibers forming the fireproof layer 4, rock wool, ceramic fibers, and the like are suitable.

Next, it attaches and demonstrates to the example of attachment of the fireproof layer 4 in the fireproof structure 1 of 1st embodiment.
The insert 12 shown in FIG. 1 is formed of a heat-resistant material in a rod shape (shaft shape) and is screwed at the upper end.
A plurality of insertion holes H (only one is shown in FIG. 1) formed integrally with the FRP material 6 and the core material 10 are formed on the surface side of the FRP structure 2. The insertion hole H is formed to have the same diameter or a slightly smaller diameter than the outer diameter of the rod-shaped insert 12, and the inserted insert 12 can be fitted and held by an interference fit.
The lower end of the insert 12 inserted into the FRP structure 2 from the insertion hole H is embedded in the core material 10 and held upright on the surface of the FRP structure 2.

Here, the erected insert 12 is in a state where the upper end protrudes from the upper surface of the refractory layer 4 laid on the upper surface of the FRP material 6 on the surface side of the FRP structure 2.
Therefore, the nut 16 serving as a screw member is screwed into the screw from the upper end of the insert 12 via the washer 18, and the refractory layer 4 is sandwiched between the insert 12 and the nut 16 to tighten the FRP structure 2. It is held on the upper surface of the FRP material 6 on the surface side.

Thus, the back surface of the FRP structure 2 from which the insert 12 does not protrude can be used as a decorative plate by fixing the refractory layer 4 without the tip of the insert 12 penetrating the FRP structure 2. Moreover, attaching / detaching the refractory layer 4 can be performed easily by attaching / detaching the nut 16 to / from the insert 12.
Thereby, the construction man-hour of the fireproof structure 1 can be reduced.

  Here, the insert 12 is configured as a heat-resistant material such as ceramics or a ceramic composite material. In particular, heat resistance, corrosion resistance, and thermal shock resistance can be improved by using a lightweight porous SiC-based ceramic composite material.

  Moreover, the insert 12 is excellent in flame resistance, and can also be comprised with the phenol, a polyimide, and an epoxy resin known as a thermosetting resin. In particular, phenol and epoxy resins have mechanical strength.

  In this way, the insert 12 is made of ceramic or ceramic composite material, phenol, polyimide, or epoxy resin in addition to conventional metal materials such as steel and aluminum alloy, thereby preventing the fireproof layer from falling off in the event of a fire. Can do.

Next, an attachment example of the fireproof layer 4 in the fireproof structure 20 according to the second embodiment will be described with reference to FIG.
FIG. 2 shows a cross-sectional view of the refractory structure according to the second embodiment. In the second embodiment, the same members as the constituent members described in the first embodiment are denoted by the same reference numerals, and redundant descriptions are provided. It is omitted and the following description is the same.

  In the insert 22 in the second embodiment, the lower end side is formed longer than the insert 12 in the first embodiment. The insertion hole H is formed to be the same diameter or slightly smaller than the outer diameter of the rod-shaped insert 14 as in the first embodiment, and the insert 22 is fitted and held by an interference fit.

  The lower end of the insert 22 inserted through a plurality of insertion holes H (only one is shown in FIG. 2) is held in contact with the inner wall surface of the FRP material 8 on the back surface side of the FRP structure 2.

Here, the mounting action and effect of the fireproof layer 4 by the insert 22 are the same as those in the first embodiment, and thus the description thereof is omitted. In the second embodiment, the insert 22 is the FRP material 8 on the back side of the FRP structure 2. The lower end abuts on the inner wall surface of the FRP structure and is embedded in the FRP structure 2 in a state of being inserted into the insertion hole H.
Thereby, since the insert 22 embedded in the core material 10 of the FRP structure 2 is configured as a support, the rigidity of the FRP structure 2 is increased and the vertical holding force of the insert 22 is stabilized.

Next, it attaches to the example of attachment of the fireproof layer 4 in the fireproof structure 30 which concerns on 3rd embodiment, and demonstrates with reference to FIG.
The insert 32 shown in FIG. 3 is formed in a rod shape with a heat-resistant material as in the first embodiment, and a screw is screwed at the upper end. The FRP material 6 on the surface side of the FRP structure 2 has a plurality of insertion holes H (only one is shown in FIG. 3).

The insertion hole H is formed with a slightly larger inner diameter that can be inserted through the insert 32. The insert 32 is inserted into the insertion hole H in which the adhesive B is applied to the inner wall, and is fixedly bonded.
Thereby, the insert 32 can be erected and held in a stable state on the FRP material 6 on the surface side of the FRP structure 2.

The inorganic adhesive B has heat resistance that can withstand a high temperature of 1400 ° C., and the insert 32 is bonded and fixed to the upper surface of the FRP material 6 on the surface side of the FRP structure 2 by using the inorganic adhesive B. In the event of a fire, the retention of the refractory layer is stable and can be prevented from falling off.
In addition, since the inorganic adhesive B also has excellent workability, it has good workability and can be used in places where corrosion resistance, wear resistance, and organic solvent resistance are required.

  Furthermore, instead of the inorganic adhesive B, a caulking material can be used for bonding. This caulking material is lightweight, has excellent properties of heat insulation and heat resistance, and putty-like filling of silicone resin or polymer latex (for example, CP-25WB manufactured by Sumitomo 3M) as a sealing material By using this as the adhesive B of the insert 32, the retention of the refractory layer during a fire is stabilized.

Next, an example of attaching the refractory layer 4 in the refractory structure 40 according to the fourth embodiment will be described with reference to FIG.
In the insert 42 in the fourth embodiment, the lower end side is formed longer than the insert 32 in the third embodiment. The insertion hole H is formed with a slightly large inner diameter through which the rod-like insert 42 can be inserted as in the third embodiment.
The lower end of the insert 42 inserted through the insertion hole H is inserted into the FRP structure 2, and the lower end side of the insert 42 is held in contact with the inner wall surface of the FRP material 8 on the back side of the FRP structure 2.

The insertion hole H is formed with a slightly larger inner diameter that can be inserted through the insert 42. The insert 42 is inserted into the insertion hole H in which the adhesive B is applied to the inner wall, and is fixedly bonded.
Thereby, the insert 42 can be erected and held in a stable state on the FRP material 6 on the surface side of the FRP structure 2.

  The action and effect given to the FRP structure 2 by the insert 42 are the same as those of the second embodiment, and the attachment action and effect of the fireproof layer 4 by the insert 42 are the same as those of the first embodiment, and thus the description thereof is omitted. .

Next, it attaches | subjects to the fireproof structure 50 which concerns on 5th embodiment, and is demonstrated with reference to FIG.
The insert 52 of the fireproof structure 50 according to the fifth embodiment includes a pedestal 54 formed of a heat-resistant material in a cylindrical shape (flange portion), and a screw shaft 55 erected upward from the center of the pedestal 54. It is constructed integrally.

  A plurality of large-diameter insertion holes 56 (only one is shown in FIG. 5) are formed in the FRP material 6 on the surface side of the FRP structure 2, and a base 54 is inserted and held in the large-diameter insertion hole 56. Then, it is inserted into the holding hole 58 formed in the core material 10, and the lower surface is in contact with the inner wall surface of the FRP material 8 on the back surface side of the FRP structure 2.

  The large-diameter insertion hole 56 is formed to be the same as the outer diameter of the pedestal 54, or slightly smaller or slightly larger in diameter, so that the pedestal 54 inserted through the large-diameter insertion hole 56 can be held by an interference fit or adhesion. The holding hole 58 in the core material 10 is also formed to have the same diameter as the large-diameter insertion hole 56, or a slightly smaller diameter or a slightly larger diameter.

Therefore, when the pedestal 54 of the insert 52 is held in the large-diameter insertion hole 56 and the holding hole 58 by interference fit or adhesion and embedded and joined, the upper end of the screw shaft 55 protrudes from the upper surface of the refractory layer 4, The nut 16 is screwed onto the screw of the screw shaft 55 from the upper end of the screw shaft 55 through the washer 18.
Next, by tightening the nut 16, the refractory layer 4 is fixed to the upper surface of the FRP material 6 on the surface side of the FRP structure 2 while being sandwiched between the base 54 of the insert 52 and the nut 16.

  5 illustrates the case where the pedestal 54 of the insert 52 is in contact with the inner wall surface of the FRP material 8, but the pedestal 54 does not necessarily have to be in contact with the inner wall surface of the FRP material 8.

Next, the fireproof structure 60 according to the sixth embodiment will be described with reference to FIG.
As in the first to fifth embodiments, the pin 62 of the fireproof structure 60 according to the sixth embodiment is formed in a rod shape with a heat-resistant material, and is screwed at one end. The other end of the pin 62 is adhesively bonded with the adhesive B and is held upright on the upper surface of the FRP material 6 on the surface side of the FRP structure 2.

Therefore, one end of the pin 62 protrudes from the refractory layer 4 laid on the upper surface of the FRP material 6 on the surface side of the FRP structure 2, and the nut 16 is screwed to the thread portion of the one end of the pin 62 via the washer 18.
As a result, the refractory layer 4 is held between the pin 62 and the nut 16 via the washer 18 and held on the upper surface of the FRP material 6.

Next, the fireproof structure 70 according to the seventh embodiment will be described with reference to FIG.
The pin 72 used in the fireproof structure 70 according to the seventh embodiment includes a flange portion 74 formed in a disk shape from a heat-resistant material, and a screw portion at the upper end standing up from the center of the flange portion 74. And a screw shaft 75 having an integral structure.

Thus, the outer periphery and bottom surface of the flange portion 74 are adhesively bonded to the upper surface of the FRP material 6 on the surface side of the FRP structure 2 by the adhesive B, and the pin 72 is held upright on the upper surface of the FRP material 6 on the surface side of the FRP structure 2. The
As a result, the refractory layer 4 is held between the flange portion 74 of the pin 72 and the nut 16 via the washer 18 and held on the upper surface of the FRP material 6.

Next, the eighth embodiment of the fireproof structure is attached to the fireproof structure 80 and will be described with reference to FIG.
The fireproof structure 80 according to the eighth embodiment includes an insert 82 and a bolt 84 for attaching the fireproof layer 4 laid on the upper surface of the FRP material 6 on the surface side of the FRP structure 2.
The insert 82 is made of a heat-resistant material and is formed of a cylindrical block. A screw hole TH (tap) is formed in the center, and a bolt 84 can be screwed into the screw hole TH. .

A plurality of large-diameter insertion holes 86 (only one is shown in FIG. 8) are formed in the FRP material 6 on the surface side of the FRP structure 2. The large-diameter insertion hole 86 is formed to have the same diameter as, or slightly smaller than, or slightly larger than the outer diameter of a cylindrical insert 82 described later, and the cylindrical insert 82 is tightly fitted into the large-diameter insertion hole 86 or Retained by adhesion.
The insert 82 is inserted into a holding hole 88 formed inside the core material 10 and embedded and joined, and the lower end surface thereof is in contact with the inner wall surface of the FRP material 8 on the back surface side of the FRP structure 2.

  Therefore, the bolt 84 is screwed into the screw hole TH on the center upper surface of the pin 62 from the upper surface of the refractory layer 4 laid on the upper surface of the FRP material 6 on the surface side of the FRP structure 2, and the washer 18 is attached by the insert 82 and the head of the bolt 84. The refractory layer 4 is sandwiched and held on the upper surface of the FRP material 6.

Finally, the ninth embodiment of the fireproof structure is attached to the fireproof structure 90 and will be described with reference to FIG.
The fireproof structure 90 according to the ninth embodiment includes a rod-like insert 92 and a nut 16 each having a screw threaded at one end thereof for attaching the fireproof layer 4 laid on the upper surface of the FRP material 6 on the surface side of the FRP structure 2. It has.

  A plurality of insertion holes 94 (only one is shown in FIG. 9) is formed in the FRP material 6 on the front surface side of the FRP structure 2, and a hole 96 having the same diameter as the insertion hole 94 is formed inside the core material 10. It opens to the inner wall of the FRP material 8 on the side.

  A rod-like insert 92 is bonded and fixed to the inner wall of the FRP material 8 on the back surface side with an adhesive B. The insert 92 is accommodated inside the hole 96 and has an upper end protruding above the FRP material 6 on the surface side through the washer 18 having a larger diameter than the insertion hole 94 of the FRP material 6.

Therefore, the refractory layer 4 laid above the FRP material 6 on the front side is screwed into the nut 16 through the washer 18 with the screw at the upper end of the insert 92 protruding through the refractory layer 4.
As a result, the refractory layer 4 is sandwiched between the two washers 18 by the nut 16 screwed with the insert 92 and held on the upper surface of the FRP material 6 on the surface side of the FRP structure 2.

As described above, according to the fireproof structure according to the first to ninth embodiments, when the FRP structure is joined by the insert, the screw member is screwed into the insert embedded in the FRP structure so that the insert is screwed. The fireproof layer can be sandwiched and fixed without penetrating the FRP structure.
Thereby, the surface side of the FRP structure which an insert does not protrude can be used effectively as a decorative board. In addition, since the work of attaching and removing the refractory layer is simplified, the number of man-hours for constructing the refractory structure can be reduced. Furthermore, by using a heat-resistant insert and an adhesive, it is possible to prevent the fire-resistant layer from falling off during a fire.

  Various shapes, combinations, and the like of the constituent members described in the above-described embodiments are merely examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, a plurality of inserts formed in a block shape with a flame-retardant and soft material are embedded and bonded inside the core material 10 constituting the FRP structure 2, and the refractory layer 4 laid above the FRP material 6. Alternatively, a nail or a tapping screw may be driven into the insert from the top surface. Thereby, the nail or the tapping screw can be fixed by the frictional force of the block-like insert and can hold the fireproof layer 4.

  1, 20, 30, 40, 50, 60, 70, 80, 90 ... fireproof structure, 2 ... FRP structure, 4 ... fireproof layer, 12, 22, 32, 42, 52, 82, 92 ... insert (support) (Shaft body), 16 ... nut (screw member), 54, 74 ... flange portion, 62, 72 ... pin (support shaft body), 84 ... bolt (screw member), B ... adhesive

Claims (6)

A fireproof structure provided with a fireproof layer made of inorganic cotton-like fibers on at least a part of the surface of the FRP structure,
A fireproof structure characterized in that a support shaft body is embedded and joined to the FRP structure, and the fireproof layer is sandwiched and fixed by a screw member screwed into the support shaft body and the support shaft body. A fireproof structure provided with a fireproof layer made of inorganic cotton-like fibers on at least a part of the surface of the FRP structure,
A fireproof structure, wherein a support shaft is joined to a surface of the FRP structure, and the fireproof layer is sandwiched and fixed by a screw member screwed into the support shaft and the support shaft.   The fireproof structure according to claim 1, wherein the support shaft body has a flange portion at one end, and the flange portion is joined to the FRP structure.   The fireproof structure according to any one of claims 1 to 3, wherein the support shaft body is made of ceramics or a ceramic-based composite material.   The fireproof structure according to any one of claims 1 to 3, wherein the support shaft body is made of a phenol resin, a polyimide resin, or an epoxy resin.   The fireproof structure according to any one of claims 1 to 5, wherein an adhesive or a caulking material is used for joining the support shaft body and the FRP structure.

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