JP4421584B2 - Fireproof seal body and fireproof seal structure - Google Patents

Description

  The present invention relates to a fireproof seal body and a fireproof seal structure.

Concrete floor slabs such as balconies and outer corridors protruding from the building are likely to become thermal bridges to the concrete frame, and as a means of preventing thermal strength from the concrete floor slab to the inside of the concrete frame, as shown in FIG. A structure in which a heat insulating material 36 is provided between 34 and a concrete housing 35 is known. The heat insulating material 36 has a fireproof seal structure 38 having fireproof performance because the reinforcing bars 37 arranged over the concrete floor slab 34 and the concrete frame 35 must be protected from heat in the event of a fire. As another fireproof seal structure, for example, the invention of Japanese Patent Laid-Open No. 10-245911 is known.
JP-A-10-245911

  However, since the heat insulation material with the above fireproof seal structure uses artificial mineral fiber heat insulation material such as rock wool, it is very difficult to install between the concrete floor slab and the concrete frame. It was complicated.

  This invention is made | formed in view of these problems, The objective is to provide the fireproof seal body and fireproof seal structure which do not require a troublesome labor.

The fireproof seal structure for solving the above-described problem is that an inorganic foam having an appropriate size corresponding to the gap, the fireproof seal fitted in the gap between the joint of the balcony and the concrete frame in the building, and the foam An upper end support bar that is inserted through the upper through-hole of the body and extends over the balcony and the concrete frame, and a upper end support bar that is inserted through the lower through-hole of the foam and extended between the balcony and the concrete frame. A large-diameter lower end support material, a cement-based adhesive that is applied to the lower surface of the foam and protects against the heat of the fire by evaporation of moisture, and is attached via the cement-based adhesive to protect from the heat of the fire on the lower side. It consists of an inorganic type foam board which protects the supporting reinforcement of the said upper end or a lower end. In addition, a cement adhesive is appropriately applied to the inner peripheral surface of each of the upper through hole and the lower through hole.
Further, the gist of the fireproof seal structure according to the present invention is that a fireproof seal body fitted in an interlayer gap between a curtain wall and a beam material in a building has an appropriate size corresponding to the interlayer gap and a width of a flange upper surface of the beam material. An inorganic foam that is installed in half and the front end abuts against the back side of the curtain wall to close the gap between the layers, and a cement adhesive that is applied to the lower surface of the foam and protects from the heat of the fire by evaporation of moisture And an inorganic foam plate that is attached via the cement adhesive and protects the curtain wall fastener from the heat of the fire on the lower side, and a beam material disposed under the fireproof seal body The surface is covered with a refractory material.

  Even if the inorganic foam board is heated by the heat of a fire by adhering the inorganic foam board to the side exposed to the fire of an appropriately sized inorganic foam through a cement adhesive, Since the agent also exhibits a heat insulating effect, sufficient fire resistance performance is exhibited. Further, the reinforcing bars can be easily arranged through the through holes provided in the inorganic foam. Moreover, sufficient fire resistance can be ensured by using the inorganic foam and the inorganic foam plate as a calcium carbonate plate or an aluminum carbonate plate. In addition, the fireproof seal plate is fitted into any of the gaps at the joint between the frame and the balcony, the gaps at the edges of the columns and the seismic reinforcement walls, and the interlayer gap between the curtain wall and the beam. Can be secured. In addition, when installing conventional mineral fiber insulation such as rock wool, a shape retention formwork such as bagging with polyethylene sheets is required. However, because the fireproof seal has shape retention performance, cast-in-place concrete is cast. No shape-retaining formwork is required for installation.

  Hereinafter, embodiments of the fireproof seal body and fireproof seal structure of the present invention will be described. First, an embodiment of a fireproof seal body will be described, and then an embodiment of a fireproof seal structure using the fireproof seal body will be described. In each embodiment, the same components are denoted by the same reference numerals and described. Only different components will be described with different reference numerals.

  FIG. 1 shows a refractory seal body 1 according to the first embodiment. The refractory seal body 1 is composed of a rectangular inorganic foam 2 and an inorganic foam plate 3 having an appropriate size. The foamed plate 3 is bonded to the side of the inorganic foam 2 exposed to fire (the lower side in FIG. 1) via a cement adhesive 4. The inorganic foam 2 is a calcium carbonate plate or an aluminum carbonate plate having an appropriate thickness, and through holes 5 and 6 for passing reinforcing bars are opened in the upper and lower parts, and the lower through hole 6 is formed from the upper through hole 5. Also has a large diameter. Although the inorganic foam 2 and the inorganic foam plate 3 each have high fire resistance, the cement adhesive 4 also has high fire resistance, which is not inferior to these. Can be increased. The inorganic foam 2 is integrally formed to a thickness that matches the size of the gap to be fitted.

  FIG. 2 shows a fireproof seal 7 according to the second embodiment. The refractory seal body 7 is obtained by bonding the inorganic foam plate 3 to the upper and lower surfaces of the inorganic foam 2 via a cement adhesive 4, that is, on the upper surface of the refractory seal body 1 of the first embodiment. Also, the inorganic foamed plate 3 is bonded through a cement adhesive 4. Even if the upper and lower surfaces are exposed to fire, the heat is blocked from the upper and lower surfaces by the inorganic foamed plate 3 and the cement adhesive 4, and sufficient fire resistance can be maintained.

  FIG. 3 shows a fireproof seal 8 according to the third embodiment. This fireproof seal 8 is obtained by coating the side of the inorganic foam 2 exposed to fire with a cement adhesive 4. That is, the lower surface of the inorganic foam 1 of the first embodiment is covered with the cement adhesive 4. Since the cement adhesive 4 has sufficient fire resistance like the inorganic foam plate 3, it protects the reinforcing bars and the like from heat due to fire. This is not limited to one side of the inorganic foam 2 as described above, but the upper and lower surfaces of the inorganic foam 2 can be covered with a cement adhesive 4 as shown in FIG.

  Moreover, as shown in FIG. 5, as the fireproof seal body 9 of 4th Embodiment, the upper and lower sides of the inorganic foam 2 of the fireproof seal bodies 1, 7, and 8 of said 1st-3rd embodiment are shown. Alternatively, the cement adhesive 4 may be applied to the inner peripheral surfaces of the through holes 5 and 6 at appropriate thicknesses. When the cement adhesive 4 is applied to the inner peripheral surfaces of the through holes 5 and 6 with appropriate thickness in this way, the outer peripheral surface of the reinforcing bars is covered with the cement adhesive 4 when the reinforcing bars are passed through the through holes 5 and 6. Therefore, the fire resistance is further increased.

  FIG. 6 shows a fireproof seal 10 according to the fifth embodiment. This fireproof sealing body 10 is one in which the through holes 5 and 6 through which the reinforcing bars are passed are not opened in the inorganic foam 2, and other than this, it has the same configuration as the fireproof sealing body 1 of the first embodiment. is there.

  Moreover, as shown in FIG. 7, as the fireproof seal body 11 of the sixth embodiment, the inorganic foamed plate 3 is also provided on the upper surface of the fireproof seal body 10 of the fifth embodiment via the cement adhesive 4. The inorganic foam 2 does not have through holes 5 and 6 through which reinforcing bars pass. Similarly to the above, this refractory seal body 11 is protected from both the upper and lower surfaces to be protected from heat due to fire, and maintains sufficient fire resistance.

  Furthermore, one side or both sides of the inorganic foam 2 without the through holes 5 and 6 through which the reinforcing bars pass can be covered only with the cement adhesive 4, and both can maintain sufficient fire resistance. This is similar to the fireproof seal body 8 of the third embodiment, in which the cement-based adhesive 4 is directly coated on one side or both sides of the inorganic foam 2 and the inorganic foam plate 3 is omitted. It is.

  Moreover, as the fireproof seal body 12 of the seventh embodiment, the inorganic foam 2 in the fireproof seal bodies 1, 7, 8, 9, 10, and 11 of the first to sixth embodiments is shown in FIG. As shown in FIG. 2, a plurality of thin foam plates 2a can be formed to overlap each other.

  Moreover, as shown in FIG. 9, as the fireproof seal body 13 of the eighth embodiment, the fireproof seal bodies 1, 7, 9, 10, of the first, second, and fourth to seventh embodiments described above. A plurality of the inorganic foamed plates 3 in 11 and 12 can be bonded to the inorganic foamed material 2 via the cement adhesive 4.

  In addition, the through holes 5 and 6 in the inorganic foam 2 of the fireproof seal bodies 1, 7, 8, 9, 12, and 13 according to the first to fourth, seventh, and eighth embodiments have upper and lower portions. The same diameter, or the upper part may be larger than the lower part.

  In addition, the inorganic foam 2 in the fireproof seal body of the above embodiment is not limited to the calcium carbonate plate or the aluminum carbonate plate as described above, but may be any heat resistant one. Furthermore, it is not limited to a cement adhesive, and may be an adhesive mixed with mortar, gypsum, diatomaceous earth, and the like.

  10 and 11 show a fireproof seal structure 16 in which the fireproof seal body 1 according to the first embodiment is installed at the joint between the balcony 14 and the concrete housing 15, and a through hole in the upper part of the inorganic foam 2. 5 is inserted with the upper support bars 17 arranged over the balcony 14 and the concrete housing 15, and the lower through-hole 6 having a diameter larger than the through-hole 5 is arranged over the balcony 14 and the concrete housing 15. The lower end support member 18 made of stainless steel is inserted, and pressure bearing plates 19 are provided at both ends of the lower end support member 18. This refractory seal body 1 is installed over the entire length of the joint between the balcony 14 and the concrete casing 15, and the refractory seal body 1 having an appropriate length is continuously joined in the length direction.

  In addition, since the inorganic foam plate 3 is bonded to the lower surface of the inorganic foam 2 through the cement adhesive 4, the lower end support member 18 and the upper end support bar 17 are affected by heat from the fire on the lower side (lower floor). Is protected. These are protected by the inorganic foam plate 3, the cement adhesive 4 and the inorganic foam 2, respectively. However, the lower end support 18 and the upper end are also formed when water in the cement adhesive 4 evaporates due to heat from a fire. The support muscle 17 is protected. This fireproof seal body 1 is installed in the gap 20 at the joint 16 between the balcony 14 and the concrete housing 15 by inserting the upper end support bar 17 and the lower end support member 18 into the through holes 5 and 6. It can be performed by applying cement adhesive 4 to both side surfaces of inorganic foam 2. When the cement adhesive 4 is applied to both side surfaces of the inorganic foam 2 in this way, the entire surface of the inorganic foam 2 is covered with the cement adhesive 4 so that the fire resistance is further enhanced.

  In addition to the fireproof seal body 1, the fireproof seal bodies 7, 8, 9, 12, and 13 of the second to fourth, seventh, and eighth embodiments are used for the fireproof seal structure 16. In this case, the same effect as described above can be obtained.

  FIG. 12 shows a fireproof seal structure 24 in which the fireproof seal body 10 of the fifth embodiment is fitted in the interlayer gap 23 between the curtain wall 21 and the beam material 22, and the width of the upper surface of the flange 22a of the steel beam. In addition to being installed in half, the tip side is in contact with the back side of the curtain wall 21 to block the interlayer gap 23. And the inorganic type foam board 3 is adhere | attached through the cement adhesive 4 on the lower surface applied to the back surface of the curtain wall 21 from the upper surface of this flange 22a. Therefore, the fasteners of the curtain wall 21 and the like are protected from the heat from the fire on the lower floor. The surface of the steel beam 22 is covered with a refractory material 25 such as rock wool.

  In addition to the fireproof seal body 10, the fireproof seal body 11 of the sixth embodiment can also be used, and in this case, the same effect as described above can be obtained.

  FIG. 13 shows a fireproof seal structure 29 in which the fireproof seal body 7 of the second embodiment is installed in the gap 28 in the edge cut portion between the column 26 and the seismic reinforcement wall 27. The gap 28 is provided between the structure and the earthquake-resistant reinforcement wall 27 so that the rigidity of the earthquake-resistant reinforcement wall 27 can be ignored in order to minimize the influence on the structure. This fireproof sealing body 7 is obtained by adhering the inorganic foam plate 3 to both front and rear surfaces of the inorganic foam 2 via a cement adhesive 4, and from the heat due to fire on both sides to the column 26 and the seismic reinforcement wall 27. The arranged reinforcing bars 30 are protected. In addition, the refractory seal body 7 can also be installed in the gap 29 in the edge cut portion 28 by applying the cement adhesive 4 on both side surfaces of the inorganic foam 2.

  FIG. 14 and FIG. 15 show a fire resistance performance test of the fireproof seal body 1 of the first embodiment. As shown in FIG. 14, a thin fireproof seal body 1a having a thickness of 50 mm and a thick fireproof seal body 1b having a thickness of 80 mm are installed, and a steel material 31 is disposed on the thin fireproof seal body 1b. Is obtained by heating the lower surface of the concrete floor board 32 having a size of 1810 mm.

  As a result of heating for 60 minutes from the lower side of the concrete floor board 32 according to the fire resistance standard heating curve of IS0834, both of the thin fireproof seal body 1a and the thick fireproof seal body 1b continue to the non-heated side for more than 10 seconds. There were no spouts, flames that continued for more than 10 seconds on the non-heated surface, damage such as cracks through which the flames passed, and no gaps.

  Moreover, as shown in FIG. 15, the maximum temperature of the steel material 31 in the thin fireproof seal body 1a is 168 ° C., and the maximum temperature of the steel material 31 in the thick fireproof seal body 1b is 155 ° C. The maximum temperature was 42 ° C., and the maximum temperature on the upper surface of the thick fireproof seal 1b was 39 ° C. As a result, it was confirmed that the fireproof seal body 1 of the first embodiment had sufficient fireproof performance.

  Moreover, it was confirmed that the fireproof sealing body 8 of the third embodiment also has sufficient fireproof performance as described above.

It is a fireproof seal body of a 1st embodiment, (1) is a front view and (2) is the sectional view. It is a fireproof seal body of a 2nd embodiment, (1) is a front view and (2) is the sectional view. It is a fireproof seal body of a 3rd embodiment, (1) is a front view and (2) is the sectional view. It is a fireproof seal body of a 3rd embodiment, (1) is a front view and (2) is the sectional view. It is sectional drawing of the fireproof sealing body of 4th Embodiment. It is a fireproof seal body of a 5th embodiment, (1) is a front view and (2) is the sectional view. It is the fireproof seal body of 6th Embodiment, (1) is a front view, (2) is sectional drawing. It is sectional drawing of the fireproof sealing body of 7th Embodiment. It is sectional drawing of the fireproof sealing body of 8th Embodiment. It is sectional drawing of the fireproof seal structure of 1st Embodiment. It is sectional drawing of the fireproof seal structure of 1st Embodiment. (1) And (2) is sectional drawing of the fireproof seal structure of 2nd Embodiment. It is the fireproof seal structure of 3rd Embodiment, (1) is a front view, (2) is the same sectional drawing. (1) is a top view of the fireproof sealing body of 1st Embodiment used by the fireproof performance test, (2) And (3) is the same sectional drawing. It is the graph which showed the fireproof performance test of the fireproof seal body. It is sectional drawing of the conventional fireproof seal structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 7, 8, 9, 10, 11, 12, 13 Fireproof sealing body 2 Inorganic foam 2a Foam board 3 Inorganic foam board 4 Cement adhesive 5, 6 Through-hole 14 Balcony 15 Concrete frame 16, 24, 29, DESCRIPTION OF SYMBOLS 38 Fireproof seal structure 17 Upper end support bar 18 Lower end support material 19 Bearing plate 20, 28 Clearance 21 Curtain wall 22 Beam material 22a Flange 23 Interlaminar gap 25 Refractory material 26 Column 27 Seismic reinforcement wall 30 Reinforcement 31 Steel material 32 Concrete floor slab 34 Concrete floor slab 35 Concrete frame 36 Heat insulation 37 Reinforcing bar

Claims (3)

A fireproof sealing body fitted in a gap between a balcony and a concrete casing in a building includes an inorganic foam having an appropriate size corresponding to the gap, and an upper through hole of the foam is inserted into the balcony and the concrete casing. An upper support bar that is arranged over the lower through hole of the foam, and a lower end support member that is arranged over the balcony and the concrete frame and has a larger diameter than the upper support bar, and a lower surface of the foam A cement-based adhesive that is applied to and protected from the heat of fire by evaporation of moisture, and an inorganic foam that is attached via the cement-based adhesive and that protects the upper or lower support bars from the heat of the fire on the lower side Consisting of a board,
  Fireproof seal structure characterized by   A cement-based adhesive is appropriately applied to the inner peripheral surface of each of the upper and lower through-holes,
  The fireproof seal structure according to claim 1, wherein: A fireproof sealing body fitted in the interlayer gap between the curtain wall and the beam material in the building is installed in the half width of the upper surface of the flange of the beam material with an appropriate size corresponding to the interlayer gap, and the tip side is on the back side of the curtain wall An inorganic foam that abuts to close the gap between the layers, a cement adhesive that is applied to the lower surface of the foam and protects from the heat of the fire by evaporation of moisture, and is bonded via the cement adhesive. It consists of an inorganic foam plate that protects the curtain wall fastener from the heat of the fire on the lower side,
The beam material disposed under the fireproof seal body has its surface covered with a fireproof material,
  Fireproof seal structure characterized by

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