JP5427905B2 - Fire wall construction method and fire wall - Google Patents

Description

  The present invention relates to a fire wall in which a large number of fire-resistant boards are fixed to a column, and a fire wall construction method for constructing the fire wall.

  In order to construct a wall of a building such as a house, pillars are erected at appropriate intervals, a plywood board is applied to the pillar, and a lath net is applied to the outside (outdoor side) of the plywood board through waterproof paper. The lath net is fixed by hitting a U-shaped steple or the like on the pillar, and mortar is sprayed from the outside of the lath net, while glass wool for heat insulation is attached to the inside (indoor side) of the plywood.

  However, in such a construction method, since the number of construction steps increases, a method of constructing a fireproof wall using a large number of fireproof boards 10 as shown in FIG. 3 has also been proposed. In this fireproof board 10, a fireproof net 12 is superimposed on one side of a rectangular lath net 11, and a mortar base material 13 is laminated on the outer surface of the lath net 11 on the non-overlap side and the outer surface of the fireproof net 12. .

  The lath net 11 is provided with a number of square meshes by assembling steel wires W in a lattice shape, for example. In addition, the fireproof net 12 is provided with a large number of square meshes, for example, by arranging alkali-resistant glass fibers in a lattice shape. However, the mesh of the fireproof net 12 is made smaller than the mesh of the lath net 11.

  The lath net 11 and the refractory net 12 are a size larger than the mortar base material 13. That is, the outer peripheral portions 11 a and 12 a of the lath net 11 and the refractory net 12 protrude from the peripheral end surface 13 a of the mortar base 13.

  A large number of such fireproof boards 10 are arranged as shown in FIG. 4 to construct a fireproof wall. That is, the outer peripheries of the lath net 11 and the fire net 12 (not shown in FIG. 4) protruding from the mortar base 13 of the adjacent fireproof boards 10 are overlapped with each other, and the overlapped portions are the wooden pillars 1. Addressed to.

  Then, a staple (not shown) is driven into the wooden pillar 1 across the steel wire W of the lath net 11 so that the steel wire W is held, and the fireproof board 10 is fixed to the pillar 1. The And between the mortar base material 13 of the adjacent fireproof board 10 and the peripheral end surface 13a of the mortar base material 13 is filled with mortar (not shown).

  Patent Document 1 discloses an invention relating to a composite structure wall body that is provided with countermeasures against condensation while ensuring heat insulation properties and that can securely fix a lath net. In this composite structure wall, a lath net is directly heat welded to at least one side of the foamed resin plate, and a viscous mortar (not shown) as a wall material is sprayed on the lath net.

JP-A-7-300965

  Since the fireproof board 10 shown in FIG. 3 is constituted by the lath net 11, the fireproof net 12, and the mortar base material 13, it has necessary and sufficient fireproof performance. However, the fire walls are arranged along the pillars 1 with the outer peripheral portions of the lath nets 11 of the adjacent fire-resistant boards 10 overlapped, and the steel wires W of the lath net 11 are held by the staples. The mortar is only applied on the outer peripheral portions 11 a and 12 a of the fireproof net 12.

  Therefore, when a fire occurs in a neighboring house, not only the temperature of the pillar 1 is increased, but also the small diameter staple is heated to be oxidized and weakened. Then, not only the pillar 1 is burnt but also the staple cannot hold the steel wire W, and the fireproof board 10 may eventually fall off the pillar 1.

  Then, this invention makes it a subject to provide the fire wall construction method and fire wall which have the heat insulation which does not burn a pillar, etc., when a fire occurs in a neighbor.

  The fire wall construction method according to the present invention includes a plurality of fire-resistant boards in which the outer peripheral portion of a lath net with wires arranged in a mesh protrudes from the peripheral end surface of the mortar base material along the columns, and the fixture is used as a column. A fire wall construction method for fixing a lath net to a pillar by driving, wherein the fire-resistant and heat-insulating base plate is placed along the pillar, and the outer peripheries of the lath nets of adjacent fire-resistant boards are overlapped with each other. Including a step of placing along the base plate, a step of attaching the fixing plate to the outer peripheral portion of the laminated lath net, and a step of pressing the fixing plate against the lath net by a fixing device having a shaft portion to fix it to the column. It is characterized by being.

  The fire wall constructed by this fire wall construction method is such that the outer periphery of the lath net on which the adjacent fire boards are superimposed is in a state along the pillar through the fire insulation base plate. Insulated by the main plate. Then, the fixed board addressed to the outer peripheral portion of the laminated lath net is pressed against the lath net by a shaft-shaped fixture driven from the fire-resistant and heat-insulating base plate to the pillar, so that the fire-resistant board is fixed to the fixed plate and the fixed shaft. It is fixed to the pillar by.

  Therefore, even if a fire occurs in a neighboring house, the fireproof wall is not heated by the fireproof heat insulating base plate. And a fixture has an axial part preferably thicker than a wire, Therefore It is hard to be heated to high temperature and can make it difficult to oxidize and become weak. Therefore, this fire wall can prevent the fireproof board from falling off the pillar because the pillar does not burn and the fixture does not become brittle even if a fire occurs in the neighboring house.

  Moreover, the construction method of the fire wall according to the present invention may include a step of superposing a heat insulating material for providing an air layer on the column with the mortar base material.

  In the fire wall constructed by this fire wall construction method, a heat insulating material is sandwiched between the pillar and the fire resistant heat insulating base plate, and an air layer is provided between the heat insulating material and the mortar base material. With this heat insulating material and air layer, it is possible to make it difficult for outdoor hot air and cold air to be transferred indoors. Further, the heat insulating material works in cooperation with the fireproof heat insulating base plate so that the pillar is not heated.

  Further, the fire wall according to the present invention is a fire wall in which a plurality of fire-resistant boards in which an outer peripheral portion of a lath net having wires meshed and projecting from a peripheral end surface of a mortar base material is arranged adjacent to each other along a column. The fireproof thermal insulation base plate is arranged along the pillar, the outer peripheral portions of the lath nets of adjacent fireproof boards are overlapped, and the fireproof board is arranged so that the outer peripheral portion of the lath net is along the fireproof thermal insulation base plate The fixed platen is addressed to the outer periphery of the lath net, and the fixed platen is pressed against the lath net by a fixture having a shaft portion and fixed.

  According to this fireproof wall, the outer peripheral portions of the lath nets of adjacent fireproof boards are overlapped and arranged on the outdoor side so that the outer peripheral portion of the lath net follows the pillar. A fireproof and heat insulating base plate is interposed between the two. The fire-resistant and heat-insulating base plate blocks heat from the outer periphery of the lath net toward the column when a fire occurs in a neighboring house. And the fixing tool driven into the pillar preferably has a shaft portion that is thicker than the wire, so that it is difficult to be heated to a high temperature and to be difficult to be oxidized and weakened. Therefore, this fire wall can prevent the fireproof board from falling off the pillar because the pillar does not burn and the fixture does not become brittle even if a fire occurs in the neighboring house.

  Further, in the fire wall according to the present invention, the fixing plate has a length straddling one wire of the outer peripheral portion of the lath net, and through holes are formed at both ends, or the outer periphery of the lath net It is preferable that a through hole is formed in the intermediate portion with a length extending over the two wires of the portion.

  According to this fireproof wall, the fixing plate is pressed against the wire of the lath net when the fixing tool passes through the through hole formed in the fixing plate. And a through-hole is formed in the intermediate part of the fixed plate | board of the length over two wires by forming a through-hole in the both ends of the fixed plate | board of the length which straddles one wire Thus, the shaft portion that penetrates the through hole presses the fixed plate evenly without biasing the stationary platen.

  According to the present invention, there is provided a fireproof wall in which a fireproof base plate is interposed between an outer peripheral portion and a pillar of a lath net of fireproof boards that are stacked next to each other, and the outer peripheral portion of the lath net is pressed by a fixture and a fixing platen. By being constructed, the fire-resistant board can be prevented from falling off the pillar even when a fire occurs in a neighboring house.

The principal part of embodiment of the fire wall which concerns on this invention is shown, (a) is a schematic front view, (b) is the sectional view on the AA line of (a). The principal part of embodiment different from FIG. 1 of the fire wall which concerns on this invention is shown, (a) is a schematic front view, (b) is the BB sectional view of (a). It is the partially broken schematic front view and principal part expanded sectional view which show an example of a fireproof board. It is a schematic perspective view which shows an example of the fireproof wall which uses a fireproof board.

  A fire wall construction method and fire wall embodiments according to the present invention will be described with reference to the drawings. 1 (a) and FIG. 1 (b) always correspond, and FIG. 2 (a) and FIG. 2 (b) do not always correspond, and FIG. 1 (a) and FIG. 2 (b) May be combined, and FIG. 2 (a) and FIG. 1 (b) may be combined. 1 and 2, the fireproof net 12 shown in FIG. 3 is omitted. In addition, the same part as the part demonstrated in background art attaches | subjects and demonstrates the same code | symbol.

  The fireproof wall in this embodiment is constructed using the fireproof board 10 shown in FIG. However, unlike the prior art, as shown in FIG. 1, first, the fireproof and heat insulating base plate 20 is placed along the outside (outdoor side) surface of the wooden pillar 1. As the fireproof heat insulating base plate 20, for example, a plate having excellent fire resistance and light specific gravity such as a calcium silicate plate (abbreviated as a calcium plate) is used.

  The fire-resistant and heat-insulating base plate 20 is used to insulate the pillar 1 from being heated when a fire occurs in a neighboring house. Accordingly, the fireproof heat insulating base plate 20 has a width that covers the overlapping outer peripheral portion 11a of the lath nets 11 of the adjacent fireproof boards 10, that is, between the peripheral end surfaces 13a of the mortar bases 13 of the adjacent fireproof boards 10. An elongated type having a width equal to or greater than that of the pillar 1 and substantially the same width as the pillar 1 is employed.

  And the peripheral part 11a of the lath net | network 11 of the adjacent fireproof board 10 is piled up, and the some fireproof board 10 is arranged so that the outer peripheral part 11a of this overlapping lath net | network 11 may be along the pillar 1. FIG. Between the outer peripheral portion 11a of the overlapping lath net 11 and the column 1, a fireproof and heat insulating base plate 20 is interposed.

  Then, the fixing plate 30 is addressed at two or more places on one side of the outer peripheral portion 11a of the lath net 11 of each fireproof board 10, and the fixing plate 30 is pressed against the outer peripheral portion 11a of the lath net 11 by the fixture 40. The board 10 is fixed to the pillar 1. As shown in FIG. 1 (a), the fixed platen 30 is drawn in a state where two are in contact with each other on the outer peripheral portion 11a where the lath net 11 overlaps (in the drawing, it is slightly separated for easy viewing). .) A through-hole 31 is formed in both ends of the wire W, W (hereinafter referred to as “wire set W, W”).

  Alternatively, as shown in FIG. 2A, the fixed platen 30 has a length extending over two sets of wire sets W and W at the overlapping outer peripheral portion 11a of the lath net 11, and a through hole 31 in the intermediate portion. Is formed. Of course, any fixed platen 30 has a width that fits between the mortar bases 13 of the adjacent fireproof boards 10.

  The fixing plate 30 is pressed against the outer peripheral portion 11 a of the lath net 11 by the fixing tool 40. That is, the fixture 40 has a shaft portion 42 protruding from the center of a head 41 addressed to the stationary platen 30, and the shaft portion 42 is driven from the fireproof and heat insulating base plate 20 to the column 1. The shaft portion 42 has a larger diameter than the outer diameter of the wire W. In addition, although not shown, the shaft portion 42 may be a screw-in type such as a screw having a screw thread, in addition to a pointed shape driven like a nail.

  And it is preferable that the through-hole 31 is formed in the fireproof heat insulation baseplate 20 of the position where the axial part 42 of this fixing tool 40 is driven. Since the fixing plate 30 is assigned to an arbitrary position and the shaft portion 42 of the fixture 40 can be driven into the refractory heat insulating base plate 20 at an arbitrary position, many through holes 31 are formed in the fire resistant heat insulating base plate 20. In this case, not only the fire resistance is lowered, but also the strength may be insufficient. Therefore, the minimum necessary through hole 31 is formed in the fireproof base plate 20. Alternatively, when the fixing tool 40 of the shaft portion 42 such as a screw is driven (screwed), the through hole 31 is not necessarily formed in the fireproof and heat insulating base plate 20.

  In any case, in the fixture 40, the shaft portion 42 is driven to the pillar 1, so that the head portion 41 presses the fixing plate 30 against the outer peripheral portion 11 a of the lath net 11 and fixes the fireproof board 10 to the pillar 1. Since the fixed platen 30 fixes the outer peripheral portion 11a of the lath net 11 at two or more places on one side, the load of the fireproof board 10 is distributed to the plurality of pillars 1, and the pillar 1 is broken by the load of the fireproof board 10 However, the situation where the fireproof board 10 falls off the pillar 1 does not occur.

  Finally, the mortar 2 is filled between the peripheral end surface 13a and the peripheral end surface 13a of the adjacent fireproof boards 10, and the outer peripheral portion 11a of the lath net 11, the fixing plate 30 and the head 41 of the fixture 40 are mortar 2. The construction of the fire wall is completed.

  In the fire wall constructed in this manner, the outer peripheral portion 11a of the lath net 11 of the adjacent fireproof boards 10 overlaps, and the outer peripheral portion 11a of the overlapped lath net 11 is attached to the column 1 via the fireproof heat insulating base plate 20. The outer peripheral portion 11a of the lath net 11 is addressed to the fixed plate 30 at two or more places on one side, and the fixed plate 30 is fixed by a fixture 40 driven to the pillar 1.

  Therefore, even if a fire occurs in the neighboring house, the fireproof wall 10 prevents the fireproof board 10 from falling off the pillar 1. That is, since the head 41 is in contact with the stationary platen 30 of the fixture 40, even when the fixture 40 is heated, the heat is also distributed to the stationary platen 30. Moreover, since the axial part 42 of the fixing tool 40 driven into the pillar 1 is larger diameter than the conventional staple, heat storage is not carried out. Therefore, the fixture 40 is not heated to an extent that it is oxidized and does not become brittle.

  Furthermore, since the pillar 1 itself is covered with the fireproof heat insulating base plate 20, heat from between the peripheral end face 13a and the peripheral end face 13a of the mortar base 13 of the adjacent fireproof board 10 heats the pillar 1. do not do. Therefore, this fireproof wall has the performance that the pillar 1 does not burn and the fireproof board 10 does not fall off the pillar 1 even if a fire occurs in a neighboring house.

  The present invention can be variously modified without being limited to the above embodiment. For example, the heat-resistant wall may be provided with a heat insulating material 50 for providing an air layer S between the fire-resistant board 10 and the fire-resistant wall 10 as shown in FIG. The heat insulating material 50 is formed into a plate shape having the same size as a fireproof boat, for example, by rock wool.

  The heat insulating material 50 is interposed so as to be sandwiched between the pillar 1 and the fireproof heat insulating base plate 20. Therefore, after the heat insulating material 50 is laid over the pillar 1, the fireproof and heat insulating base plate 20 is applied along the pillar 1.

  In such a fireproof wall, an air layer S is provided between the fireproof board 10 and the heat insulating material 50, and not only the outdoor cold air and hot air can be blocked by the air layer S, but also the heat insulating material 50. In combination with the refractory heat insulating base material 20, the pillar 1 is shielded from the heat at the time of fire and acts to prevent the pillar 1 from being heated.

  In addition, the fixed platen 30 has a length that spans one wire W or a length that spans two wires W in the above embodiment, but may span three or more wires W, The length over the entire length of the fireproof board 10 may be used.

  Further, in the fixed plate 30 having a length straddling one wire W and the fixed plate 30 having a length extending over two wires W, the L-shaped fixture 40 does not provide the through hole 31. You may make it hold down. The shaft part 42 of the two L-shaped fixtures 40 sandwiches both end edges of the fixed platen 30 and the bent head part 41 presses the end part of the fixed platen 30 so that the shaft part 42 extends to the column 1. The fixed platen 30 can be pressed against the lath net 11 by driving.

  The lath net 11 is basically assembled by the steel wire W, but the material is not limited. In the fireproof board 10 of the above embodiment, a fireproof net (not shown) is superimposed on the lath net 11, but the fireproof net may be omitted depending on the use situation. Further, the fixture 40 may be of a type that is not driven into the pillar 1 but fixed around the side face of the pillar 1 from the inner side (indoor side).

DESCRIPTION OF SYMBOLS 1 ......... Pole 10 ... Fireproof board 11 ... Lath net 11a ... Outer peripheral part 13 ... Mortar base material 13a ... Perimeter end face 20 ... Refractory thermal insulation base plate 30 ... Fixing plate 31 ... Through hole 40 ... Fixed Ingredient 41 ... Head 42 ... Shaft 50 ... Insulation S ... Air layer W ... Wire

Claims (4)

Fireproof board that fixes the lath net to the pillar by arranging a plurality of fireproof boards with the outer periphery of the lath net, which is made of wire mesh, projecting from the peripheral end surface of the mortar base material along the pillar and driving the fixture into the pillar A wall construction method,
A step of placing the fireproof thermal insulation base plate along the pillar, a step of superposing the outer peripheral portions of the lath nets of adjacent fireproof boards along the fireproof thermal insulation base plate, and a fixing plate on the outer peripheral portion of the laminated lath nets A method of constructing a fireproof wall, comprising: a step of attaching to a pillar by pressing a fixing plate against a lath net by a fixture having a shaft portion.   The method for constructing a refractory wall according to claim 1, further comprising a step of superposing a heat insulating material for providing an air layer between the mortar base material and a pillar. A fire wall in which the outer peripheral part of the lath net with the wire meshed is protruded from the peripheral end surface of the mortar base material and arranged so as to be along the pillars adjacent to each other,
The fireproof insulation base plate is arranged along the pillar, the outer peripheral portions of the lath nets of adjacent fireproof boards are overlapped, and the fireproof board is arranged and fixed so that the outer peripheral portions of the lath nets are along the fireproof thermal insulation base plate. A fire wall characterized in that the board is addressed to the outer periphery of the lath net, and the fixed board is pressed against the lath net by a fixture having a shaft portion and fixed.   The fixed plate has a length straddling one wire on the outer peripheral portion of the lath net, and has a through hole formed at both ends, or a length spanning two wires on the outer peripheral portion of the lath net. And the through-hole is formed in the intermediate part, The fireproof wall of Claim 3 characterized by the above-mentioned.

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