JP7318837B1 - Fireproof structure - Google Patents

Abstract

A fire resistant structure having high fire resistance is provided. A fire-resistant structure (10) has a steel material (11), an air layer (14) surrounding the steel material (11), and a wooden fire-resistant covering material (12) surrounding the air layer (14). The wooden fireproof covering material 12 has three or more flame penetration preventing corners 22 and a fireproof material 23 provided facing the air layer 14 side of the wooden fireproof covering material 12 and connecting the adjacent flame penetration preventing corners 22. and have [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a fire-resistant structure in which wooden materials are arranged so as to surround steel materials.

In a structure in which a wooden material is disposed so as to surround the steel material as a fireproof coating for the steel material, it is generally difficult for the wooden material itself to stop burning except under special conditions. Therefore, a flame-stopping layer such as a fireproof coating is often installed. For example, Patent Literature 1 discloses covering a steel material with a damage-suppressing material and covering the damage-suppressing material with a pair of half-split wooden materials. Further, Patent Document 2 discloses that a steel frame column is covered with a wooden covering material composed of a flat plate and a closing member that closes a joint portion of the flat plate.

JP 2019-56202 A Japanese Patent Application Laid-Open No. 2022-172488

However, in Patent Document 1, the combustion heat of the half-split wooden material is directly transmitted to the steel material through the damage suppressing material. In addition, in Patent Document 2, as described above, it is difficult to stop burning with the wooden material itself, so although a quasi-fire-resistant structure can be achieved, it is difficult to achieve a fire-resistant structure.

A fire-resistant structure that solves the above problems has a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer. The wooden fire-resistant covering material has three or more flame-preventing corners, and a fire-resistant material provided facing the air layer side of the wood-based fire-resistant covering material and connecting the adjacent flame-preventing corners, have

A construction method for a fire-resistant structure for solving the above problems is a method for constructing a fire-resistant structure having a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer, wherein the wood fire-resistant The covering material includes three or more wooden plate portions, a flame penetration prevention corner portion provided at a joint portion of the adjacent wooden plate portions, and a covering material provided facing the air layer side of the wooden fireproof covering material, and a refractory material that connects the flame-intrusion prevention corners that fit together, and a manufacturing facility that joins the wood board and the flame-intrusion prevention corner to manufacture a set of wood boards with corners. a step, a erection step of erecting the steel material, and a surrounding step of surrounding the steel material with the wooden board set with corners at the construction site. According to these configurations, it is possible to realize a fire resistant structure with high fire resistance.

In the fire-resistant structure configured as described above, the wooden plate portion may be continuous at the joint portion, and the flame penetration prevention corner portion may be provided so as to face an inner surface of the corner portion of the wooden plate portion.
According to the above configuration, since the flame-intrusion prevention corner is covered with the wooden plate, the appearance of the fire-resistant structure can be enhanced.

In the fire-resistant structure having the above configuration, the wooden plate portions may be discontinuous at the joint portion, and the flame penetration prevention corner portion may connect the adjacent wooden plate portions and be exposed to the outer surface of the outer circumference. .

According to the above configuration, since the outer peripheral corners of the wooden fireproof covering material, which is susceptible to heat in the event of a fire, are formed by the flame penetration prevention corners, the fire resistance of the wooden fireproof covering material and, in turn, the fire resistance of the fireproof structure are improved. can be made

A fire-resistant structure for solving the above-mentioned problems is a fire-resistant structure having a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer, wherein the wooden fire-resistant coating material includes three a wooden plate portion as described above, a corner portion for preventing flame penetration provided at a joint portion between the adjacent wooden plate portions, and a fireproof material provided facing the air layer side of the woody fireproof covering material, The flame-intrusion prevention corner presses and closes the joints of the adjacent refractory materials. According to this configuration, the fire resistance and workability of the fire resistant structure can be improved.

The fireproof structure configured as described above may have a fixing member that penetrates the fireproof material and fixes the flame-intrusion prevention corner portion and the wooden board portion. According to this configuration, the wooden board portion, the refractory material, and the flame penetration prevention corner portion can be firmly adhered to each other.

The fireproof structure having the above configuration penetrates the air layer, has one end connected to the steel material, and the other end embedded in the wooden fireproof covering material, and heat transfer heat transfer from the wooden fireproof covering material to the steel material. may have material. According to this configuration, since the steel material and the wooden fireproof covering material are attached by the heat transfer material, the workability of the fireproof structure can be further improved.

In the refractory structure having the above configuration, the steel material may be connected to the refractory material only by the heat transfer material. According to this configuration, heat transfer to the steel material is limited to the heat transfer material, so excessive heat transfer to the steel material can be suppressed.

In the refractory structure having the above configuration, it is preferable that the heat transfer material connects only the refractory material to the steel material. According to this configuration, the burnt wooden board portion is easily peeled off from the refractory material, so it is possible to suppress the temperature rise of the refractory material and the steel material due to the combustion heat of the wooden board part.

It is preferable that the fire-resistant structure having the above-described configuration has an inlay at the edge of the other end of the heat transfer material, and the inlay functions as a part of the wooden fire-resistant covering material. According to this configuration, by arranging the buried wood at the edge, it is possible to suppress the deterioration of the fire resistance in the vicinity of the edge.

In the fire-resistant structure configured as described above, the steel material may be a steel pipe material, a concrete material may be provided inside the steel pipe material, and the steel pipe material and the concrete material may form a steel pipe concrete structure. According to this configuration, part of the heat received by the steel material can be transferred to the concrete material. As a result, the fire resistance of the steel material and, in turn, the fire resistance of the fire-resistant structure can be improved.

In the method for constructing a fire-resistant structure having the above-described configuration, the wood plate portion set with corners is spaced in the width direction from the fore edge at one end of the wood plate portion in the width direction by the thickness of the wood plate portion. The flame-preventing corners of the first set of wooden boards with corners are used as guides to connect the second set of wooden boards with corners to the first set of wood boards. is preferably joined orthogonally to the set of wood planks with corners. According to this configuration, the flame penetration preventing corner can be made to function as a guide, so that the wooden board portion set can be easily arranged.

In the method for constructing a fire-resistant structure having the above configuration, in the manufacturing step, an L-shaped set is manufactured by joining the first set of wooden boards with corners and the second set of wooden boards with corners, and In the enclosing step, the first L-shaped set and the second L-shaped set may be joined to enclose the steel material. According to this configuration, the L-shaped set can be manufactured and the L-shaped sets can be joined together using the flame penetration prevention corner as a guide.

In the method for constructing a fire-resistant structure having the above configuration, in the enclosing step, the second set of wooden planks with corners is joined to the first set of wooden boards with corners, and the second set of wooden boards with corners is joined. The third set of wooden boards with corners is joined to the set of boards, and the first set of wooden boards with corners and the third set of wooden boards with corners are joined to the fourth set of wooden boards with corners. A set of wood planks may be joined. According to this configuration, the set of wood plate portions with corners can be joined in order using the flame-preventing corners as guides.

It is a figure which shows typically the cross section of the fireproof structure in 1st Embodiment. It is a figure which shows typically an example of the construction method of the fireproof structure in 1st Embodiment. It is a figure which shows typically an example of the construction method of the fireproof structure in 1st Embodiment. FIG. 4 is a diagram schematically showing a state in which gaps between wooden board portions are thermally decomposed in the first embodiment; It is a figure which shows the cross section of the fire-resistant structure in 2nd Embodiment. FIG. 10 is a diagram showing a cross section of a set of wooden board parts with corners in the second embodiment. In the second embodiment, it is a diagram showing a cross section of an L-shaped set. FIG. 10 is a diagram schematically showing how steel materials are surrounded by an L-shaped set in the method for constructing a fire-resistant structure according to the second embodiment. It is a figure which shows the cross section of the fire-resistant structure in 3rd Embodiment. (a) is a diagram showing a cross section of a fireproof structure in a fourth embodiment, and (b) is an enlarged view of a portion surrounded by line 7b, showing each corner of the wooden fireproof covering material. FIG. 10 is a diagram showing a connection structure of a mounting member to a mounting member in a modified example;

(First embodiment)
A first embodiment of a fire resistant structure and a fire resistant structure construction method will be described with reference to FIGS.

As shown in FIG. 1, the fireproof structure 10 is a pillar or beam that has the appearance of a polygonal prism (quadrangular prism in this embodiment) and extends in the direction perpendicular to the plane of the drawing. The fire-resistant structure 10 includes a steel material 11 and a wooden fire-resistant covering material 12 .

The steel material 11 is, for example, a steel pipe material having a rectangular cross section. Attachment members 13 to which wooden fireproof covering materials 12 are attached are connected to the respective side portions of the steel material 11 . The mounting member 13 forms an air layer 14 surrounding the steel material 11 between the steel material 11 and the wooden fireproof covering material 12 . The mounting member 13 is, for example, an angle member extending in the direction perpendicular to the paper surface. The mounting member 13 is connected to the steel material 11 by a joining method such as welding. The fireproof structure 10 is designed so that a slight gap is formed between the wooden fireproof covering material 12 and the mounting member 13 so as to absorb manufacturing errors and manufacturing errors in the steel material 11 and the wooden fireproof covering material 12 .

In addition, when the steel material 11 is a steel pipe material, a steel pipe concrete structure may be configured by forming a concrete material inside the steel material 11 . The steel material 11 may be made of steel, and may be H-steel or the like when the fire-resistant structure 10 is used as a beam.

The wooden fireproof covering material 12 is formed in a hollow quadrangular prism shape containing the steel material 11 . The wooden fireproof covering material 12 is provided so as to surround the steel material 11 with an air layer 14 interposed therebetween, that is, to surround the air layer 14 .

The wooden fireproof covering material 12 has a wooden plate portion 21 , a flame penetration preventing corner portion 22 and a fireproof material 23 .
The wooden board portion 21 is a finishing material that constitutes each side portion of the wooden fireproof covering material 12 . The wooden plate portion 21 is a plate member having a length direction perpendicular to the paper surface. The wooden plate portion 21 is made of, for example, a CLT (Cross Laminated Timber) material. The wooden board part 21 is provided so that the outer periphery is continuous. Each wooden plate portion 21 forms each corner of the wooden fireproof covering material 12 having a hollow quadrangular prism shape with the neighboring wooden plate portions 21 . The wooden board portion 21 may be made of laminated lumber, sawn lumber, plywood, or the like, in addition to the CLT material. Since the wooden plate portion 21 is a fireproof covering material, it is not necessary to ensure structural performance. For this reason, materials other than JAS (Japanese Agricultural Standard) certified materials, such as CLT materials with 2 ply or less, can also be used. As a result, it is possible to reduce production costs and promote the use of wood.

The wooden board portion 21 is attached to the attachment member 13 with an attachment member 25 . The attachment member 25 is, for example, a screw. The mounting member 25 is inserted into a mounting opening 26 formed in the wooden plate portion 21 and then connected to the mounting member 13 so as to pass through the wooden plate portion 21 , the refractory material 23 and the air layer 14 . The mounting member 13 and the mounting member 25 are connected to the steel material 11 at one end and embedded in the wooden fireproof coating material 12 at the other end to form a heat transfer material for transferring heat from the wooden fireproof coating material 12 to the steel material 11 . The steel material 11 and the refractory material 23 are connected only by a heat transfer material. After the wooden plate portion 21 is attached, a filler wood 27 is arranged in the attachment edge 26 so as to cover the attachment material 25 . This inlay 27 functions as part of the wooden fireproof covering material 12 .

The flame penetration prevention corners 22 are provided at each of the inner corners formed by the adjacent wooden plate portions 21 . The flame entry prevention corners 22 extend in the direction perpendicular to the plane of the paper along each inner corner. The flame penetration prevention corner portion 22 is made of a material that is less flammable than the wood plate portion 21, such as a high heat capacity material (iron material such as a steel pipe or angle material, mortar bar, etc.), a noncombustible material (calcium silicate material), or a wood material with a large specific gravity. is formed by In this embodiment, the flame entry prevention corner 22 is an angle material.

The flame penetration preventing corner portion 22 is joined to one of the adjacent wooden plate portions 21 by a corner joint member 28 and joined to the other by a corner joint member 29 . Corner joining members 28 and 29 are, for example, screws. The corner joint material 29 is inserted into the corner joint edge 30 formed in the other of the adjacent wooden plate portions 21, and then penetrates through the wooden plate portion 21 to be joined to the flame penetration prevention corner portion 22. be. After joining with the corner joint material 29 , the filler wood 31 is arranged in the corner joint edge 30 so as to cover the corner joint material 29 . This embedded wood 31 functions as a part of the wooden fireproof covering material 12 .

The refractory material 23 is provided on the inner surface of the wooden plate portion 21 so as to face the air layer 14 . The refractory material 23 is provided so as to connect adjacent flame entry prevention corners 22 . That is, the refractory materials 23 are provided discontinuously with respect to the adjacent refractory materials 23 . The fire-resistant material 23 is composed of, for example, gypsum board, reinforced gypsum board, fire-resistant paint, fire-resistant spray material, or the like. When the refractory material 23 is a gypsum board or a reinforced gypsum board, the refractory material 23 may be connected to the wooden board portion 21 with screws (not shown) or may be adhered with an adhesive. By adhering the refractory material 23 to the wooden board part 21 with an adhesive, the burning wooden board part 21 is easily peeled off from the refractory material 23 . As a result, it is possible to suppress the heat effect from the wooden board portion 21 to the fireproof material 23 .

(Construction method for fireproof structure)
An example of the construction method of the fireproof structure 10 will be described. The construction method of the fire-resistant structure 10 has a manufacturing step, a erecting step, and a surrounding step.

In the manufacturing step, the constituent members of the wooden fireproof coating material 12 are carried into a construction site or a manufacturing facility outside the construction site, and the wood board portion 21 is joined with the fire prevention corner 22 and the fireproof material 23 to form the wood board. This is the process of manufacturing a part set.

Specifically, as shown in FIG. 2, by joining the refractory material 23 and the pair of flame penetration prevention corners 22 to the pair of wooden plate portions 21A of the wooden plate portion 21 that are arranged to face each other, A cornered wooden board set 35A is manufactured. The flame-intrusion prevention corners 22 are located at positions spaced apart by the thickness of the wooden plate portion 21B (see FIG. 3) from the fore edges of the ends of the wooden plate portion 21A in the width direction (vertical direction of the paper surface of FIG. 2). They are joined by corner joints 28 .

Further, as shown in FIG. 3, a cornerless wood plate portion set 35B is manufactured by joining a fireproof material 23 to a pair of wood plate portions 21B arranged so as to face each other.

In the manufacturing process, the wooden board sets 35A and 35B are arranged so as to form a hollow quadrangular prism, and the dimensions of each part are measured to inspect the wooden board sets 35A and 35B. is possible.

The erection step is a process in which the steel material 11 is installed at a predetermined position. The mounting member 13 may be connected to the steel material 11 after installation, or may be connected to the steel material 11 before installation. Also, the erection step may precede the fabrication process.

The enclosing step is a process of enclosing the installed steel material 11 with the wooden plate portion sets 35A and 35B. First, as shown in FIG. 2, the wooden board portion set 35A with corners is arranged at a position where the wooden board portion 21A can be attached to the mounting member 13 by the mounting material 25. As shown in FIG. After the arrangement, the wood plate portion 21A of the cornered wood plate portion set 35A may be temporarily fixed to the mounting member 13 by the mounting member 25 .

Next, as shown in FIG. 3, the no-corner wood plate portion set 35B is arranged at a position where the wood plate portion 21B can be attached to the mounting member 13 by the mounting member 25. Next, as shown in FIG. Specifically, the no-corner wood plate portion set 35B inserts the wood plate portion 21B from the outside toward the space between the pair of wood plate portions 21A, and then the pair of flame-intrusion prevention corner portions 22 hold the wood plate portion 21B on the steel material 11 side. It is placed by restricting movement to. That is, the cornerless wooden plate portion set 35B is arranged with the pair of flame penetration preventing corner portions 22 as guides. After the placement, the wood plate portion 21B of the no-corner wood plate portion set 35B may be temporarily fixed to the mounting member 13 by the mounting member 25 .

After arranging the no-corner wooden plate portion set 35B, the wooden plate portions 21A and 21B are attached to the mounting member 13 with the mounting member 25. As shown in FIG. Further, the flame penetration preventing corner 22 is joined to the wooden plate portion 21B with the corner joining material 29 . After that, a filler wood 27 is arranged in the attachment edge 26 of each of the wooden plate portions 21A and 21B, and a filler wood 31 is arranged in the corner joint edge 30 of each wooden plate portion 21B.

(Action)
As shown in FIG. 4, when a fire occurs, the fire-resistant structure 10 is susceptible to thermal effects at the outer peripheral corners of the wooden fire-resistant covering material 12 . In particular, gaps between the wooden plate portions 21 are susceptible to heat. If a gap is formed between the winning side wooden plate part 21 and the losing side due to warping, the gap part is burned and the flame penetration preventing corner part 22 which is more difficult to burn than the wooden plate part 21 is exposed. . At this time, even if the temperature of the flame penetration prevention corner 22 affected by the heat rises, since there is an air layer 14 which is a heat insulating layer between the steel material 11 and the flame penetration prevention corner 22 to the steel material 11 No direct heat transfer. Further, since the temperature of the air layer 14 is lower than that of the wooden plate portion 21, the temperature rise of the flame penetration prevention corner portion 22 is also suppressed.

Effects of the first embodiment will be described.
(1-1) In the fire-resistant structure 10, even if the crevices of the wooden plate portion 21, which is the finishing material, are thermally decomposed, the flame-intrusion prevention corner portion 22 suppresses the entry of flames into the interior of the wooden fire-resistant covering material 12. be able to. Further, since the flame penetration prevention corner portion 22 is made of a material that is more difficult to burn than the wooden plate portion 21, the flame penetration prevention corner portion 22 can suppress the spread of fire from the gap portion of the wooden plate portion 21.例文帳に追加That is, the flame entry prevention corner 22 can function as a type of fire resistant material in the fire resistant structure 10 . As a result, the fire resistance of the fire resistant structure 10 can be improved.

(1-2) By providing the air layer 14, the mounting member 13 can be arranged in the air layer 14. FIG. As a result, the wooden fireproof covering material 12 can be assembled at the construction site, so that the workability of the fireproof structure 10 can be improved.

In addition, the air layer 14 suppresses direct heat transfer from the wooden fireproof covering material 12 to the steel material 11, so that the fire resistance of the steel material 11 can be improved. That is, the fire resistance of the entire fire-resistant structure 10 can be effectively improved by the combination of the wooden plate portion 21, the flame-intrusion prevention corner portion 22, the fire-resistant material 23, and the air layer 14. In addition, the thickness of the wooden plate portion 21, the shape of the flame penetration prevention corner 22, the thickness of the refractory material 23, the thickness of the air layer 14, etc. are highly flexible, so that fire resistance such as 1 hour fire resistance or 2 hour fire resistance can be made as desired. It is also easy to obtain a fireproof structure of

(1-3) The outer peripheral surface of the fire-resistant structure 10 is composed of continuous wooden board portions 21 . As a result, the flame penetration prevention corner 22 is covered with the wooden board 21, so that the appearance of the fireproof structure 10 can be enhanced.

(1-4) The steel material 11 and the wooden fireproof covering material 12 are connected by a heat transfer material constituted by the mounting member 25 and the mounting member 13 . Since heat is transmitted from the wooden board portion 21 to the steel material 11 via this heat transfer material, the fire resistance performance of the wooden board portion 21 can be enhanced. Moreover, since the steel material 11 and the fireproof material 23 are connected only by the heat transfer material, excessive heat transfer from the wooden fireproof covering material 12 to the steel material 11 can be suppressed.

(1-5) The woody fireproof coating material 12 has a filler wood 27 at the mounting edge 26 formed in the woody plate portion 21 on the other end side of the heat transfer material, that is, on the base end side of the mounting material 25 . As a result, it is possible to suppress deterioration in fire resistance at the portion where the attachment edge 26 is formed. Moreover, the aesthetics of the fire-resistant structure 10 can also be improved.

(1-6) When arranging the no-corner wooden board set 35B, the flame penetration prevention corner 22 of the cornered wooden board set 35A functions as a guide. Thereby, the cornerless wooden board portion set 35B can be easily arranged.

(1-7) Since the concrete material is formed inside the steel material 11, part of the heat received by the steel material 11 can be transferred to the concrete material. As a result, it is possible to suppress the decrease in yield strength of the steel material 11 due to the heat effect.

(Second embodiment)
A second embodiment of a fire-resistant structure and a fire-resistant structure construction method will be described with reference to FIGS. The fire-resistant structure and construction method of the fire-resistant structure of the second embodiment have the same main configuration as the fire-resistant structure and construction method of the fire-resistant structure in the first embodiment. Therefore, in the second embodiment, portions different from the first embodiment will be described in detail, and the same reference numerals will be given to the same portions as in the first embodiment, and detailed description thereof will be omitted.

In the fire-resistant structure 40, each wooden plate portion 21 has a corner portion 22 joined to prevent flame penetration by a corner joint member 28 at its right end when the surface arranged on the side of the air layer 14 is taken as the upper surface. The adjacent wooden plate portions 21 are joined by a plate portion joining material 41 . The plate portion bonding material 41 is, for example, a screw. The plate portion bonding material 41 is inserted into a plate portion bonding edge 42 formed in the wooden plate portion 21 and then driven through the wooden plate portion 21 . After joining the wooden plate portion 21 , the filler wood 43 is arranged in the plate portion joining edge 42 so as to cover the plate portion joining material 41 . The embedment 43 functions as part of the wooden fireproof covering material 12 . Also, the refractory material 23 is provided so as to connect the adjacent flame entry prevention corners 22 .

(Construction method for fireproof structure)
An example of the construction method of the fireproof structure 40 will be described.
As shown in FIG. 6, in the manufacturing step for the fireproof structure 40, a wood plate portion set 44 with corners is manufactured by joining the flame penetration prevention corner portion 22 and the fireproof material 23 to each wood plate portion 21. . The flame-intrusion prevention corner 22 is located at a position spaced apart by the thickness of the wooden plate portion 21 from the fore edge 21a at one end of the wooden plate portion 21 in the width direction (horizontal direction of the paper surface of FIG. 6). are joined by corner joints 28 to the .

As shown in FIG. 7, after manufacturing the wooden board part set 44 with corners, an L-shaped set 45 is manufactured by joining a pair of wooden board part sets 44 with corners. Specifically, after arranging the wooden plate portions 21C and 21D in an L-shape, the wooden plate portions 21C and 21D are joined with the plate portion joining material 41, and the wooden plate portion 21C is joined to the wooden plate portion 21D. The flame penetration preventing corner 22 is joined with a corner joining material 29 . After joining the wooden plate portions 21C and 21D, a filler wood 43 is arranged in the edge 42 for joining the plate portions. In the manufacturing process, it is possible to inspect the L-shaped sets 45 by arranging the two L-shaped sets 45 so as to form a hollow quadrangular prism and measuring the dimensional values at various locations.

In the enclosing step, two L-shaped sets 45 enclose the steel material 11 .
Specifically, as shown in FIG. 8 , first, the first L-shaped set 45A is arranged at a position where the wooden plate portions 21C and 21D can be attached to the attachment member 13 by the attachment member 25 . After the arrangement, the wooden plate portions 21C and 21D of the first L-shaped set 45A may be temporarily fixed to the mounting member 13 by the mounting member 25. As shown in FIG.

Next, the second L-shaped set 45B is arranged at a position where the wooden plate portions 21C and 21D can be attached to the attachment member 13 by the attachment member 25, as indicated by arrows in the drawing. At this time, the second L-shaped set 45B is arranged so that the wooden plate portion 21C of the first L-shaped set 45A is fitted to the outside of its own flame penetration prevention corner 22, and the flame penetration prevention corner of the first L-shaped set 45A is fitted. 22 is arranged so that its own wooden plate portion 21C is fitted. That is, the second L-shaped set 45B is arranged using its own flame-prevention corner 22 and the flame-prevention corner 22 of the first L-shaped set 45A as guides. After the placement, the wooden plate portions 21C and 21D of the second L-shaped set 45B may be temporarily fixed to the mounting member 13 by the mounting member 25 .

After arranging the first L-shaped set 45A and the second L-shaped set 45B, each of the first L-shaped set 45A and the second L-shaped set 45B is attached to the other wooden board portion 21C with the wood plate portion 21D as a plate portion joining material. 41, and the flame penetration preventing corner 22 is joined to the other wooden plate portion 21D with a corner joining material 29. As shown in FIG. After that, the filler wood 27 is arranged in the attachment edge 26 of each of the wooden plate portions 21C and 21D, and the filler wood 31 is arranged in the corner joint edge 30 of each wooden plate portion 21C.

According to the second embodiment, in addition to the effects (1-1) to (1-7) described in the first embodiment, the following effects can be obtained.
(2-1) Since the adjacent wood plate portions 21 are joined by the plate portion joining material 41, the wood plate portions 21 can be brought into closer contact with each other in the gap portion.

(2-2) Since the L-shaped set 45 manufactured in the manufacturing step can stand on its own, inspection work can be easily performed. Also, if the fireproof structure 40 is a column, the work load in the surrounding step can be reduced.

(Third Embodiment)
A third embodiment of a fire-resistant structure and a fire-resistant structure construction method will be described with reference to FIG. The fire-resistant structure and construction method of the fire-resistant structure of the third embodiment have the same main configuration as the fire-resistant structure and construction method of the fire-resistant structure in the first embodiment. Therefore, in the third embodiment, portions different from the first embodiment will be described in detail, and portions similar to those in the first embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 9 , in the fireproof structure 50 , each outer peripheral corner of the wooden fireproof covering material 12 is formed by a flame penetration prevention corner 22 . The wooden plate portion 21 is provided so as to connect adjacent flame penetration prevention corner portions 22 . That is, the wooden plate portion 21 is discontinuous at the outer peripheral corner portion of the wooden fireproof covering material 12 due to the flame penetration prevention corner portion 22 . Also, the flame penetration prevention corner 22 is exposed on the outer surface of the outer circumference of the wooden fireproof covering material 12 . The flame penetration prevention corner portion 22 is formed in a shape that covers the end surface of the wooden plate portion 21 and the end portion of the surface on the side of the air layer 14 . The refractory material 23 is provided so as to connect adjacent flame entry prevention corners 22 .

The wooden plate portion 21 and the flame penetration prevention corner portion 22 are joined by a joining material 51 . The joining material 51 is, for example, a screw. The jointing material 51 is inserted into the joining edge 52 formed in the flame penetration prevention corner 22 and then driven through the end surface of the wooden plate portion 21 . After joining the wooden plate portion 21 and the flame penetration prevention corner portion 22 , a filler wood 53 is arranged in the joining edge 52 so as to cover the joining material 51 . The filler wood 53 functions as part of the wooden fireproof covering material 12 .

In addition, the construction method of the fire-resistant structure 50 is as follows: in the manufacturing step, a wood plate portion set with a corner is manufactured by joining the flame penetration prevention corner portion 22 to one end of the wood plate portion 21; A set of wooden boards with corners may be arranged. Alternatively, in the manufacturing step, an L-shaped set may be manufactured by joining the cornered wooden plate portion sets, and in the surrounding step, the two L-shaped sets may be arranged so as to surround the steel material 11 .

According to the third embodiment, in addition to the effects (1-1) to (1-7) described in the first embodiment, the following actions and effects can be obtained.
(3-1) In the fire-resistant structure 50, the outer peripheral corners of the wooden fire-resistant coating material 12, which is susceptible to heat, are formed by the flame-intrusion prevention corners 22, which are less flammable than the wooden plate portions 21. Therefore, the fire resistance of the wooden fire-resistant covering material 12 and the fire resistance of the fire-resistant structure 50 can be improved.

(3-2) Gap portion between the end surface of the wooden plate portion 21 and the flame penetration prevention corner portion 22, gap portion between the air layer 14 side surface of the wood plate portion 21 and the flame penetration prevention corner portion 22, and flame penetration The gap between the prevention corner 22 and the refractory material 23 is thermally decomposed in this order, and then the flame penetrates inside the wooden refractory covering material 12 . As a result, it is possible to further suppress the penetration of flames into the inside of the wooden fireproof covering material 12 .

(Fourth embodiment)
A fourth embodiment of a fire-resistant structure and a fire-resistant structure construction method will be described with reference to FIG. The fire-resistant structure and construction method of the fire-resistant structure of the fourth embodiment are the same as the fire-resistant structure and construction method of the fire-resistant structure in the second embodiment in the main configuration. Therefore, in the fourth embodiment, portions different from the second embodiment will be described in detail, and portions similar to those in the second embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in FIGS. 10( a ) and 10 ( b ), in the fireproof structure 60 , the fireproof material 23 is provided so as to be continuous at the inner corners formed by the adjacent wooden board portions 21 . The flame penetration prevention corner portion 22 is provided so as to close the joint portion of the refractory materials 23 , that is, the gap portion between the adjacent refractory materials 23 .

The refractory material 23 and the flame penetration prevention corner portion 22 are joined to the right end portion of each wooden plate portion 21 by a joining material 62 as a first fixing member when the surface arranged on the air layer 14 side is the upper surface. be done. The joining material 62 is, for example, a screw. The joining material 62 is driven into the wooden plate portion 21 so as to penetrate the fireproof material 23 and the flame penetration prevention corner portion 22 . Each wooden plate portion 21 is attached to the attachment member 13 in a state in which the refractory material 23 and the flame penetration prevention corner portion 22 are joined.

In addition, the refractory material 23 and the flame penetration preventing corner 22 are provided with a fixing member 63 as a second fixing member on the left end portion when the surface of each wooden plate portion 21 arranged on the air layer 14 side is the upper surface. fixed by The fixing member 63 is, for example, a screw. The refractory material 23 and the flame penetration preventing corners 22 to the wooden plate portion 21 by the fixing member 63 are performed after the wooden plate portion 21 is attached to the mounting member 13 . The fixing member 63 is inserted into a fixing small hole 64 formed in the wooden plate portion 21 and then driven into the flame prevention corner portion 22 so as to pass through the wooden plate portion 21 and the refractory material 23 . As a result, the flame penetration prevention corner 22 is provided so as to press the joints of the adjacent refractory materials 23 and close the joints of the adjacent refractory materials 23 . After fixing with the fixing member 63 , a filler wood 65 is arranged in the fixing edge 64 so as to cover the fixing member 63 . The embedding wood 65 functions as part of the wooden fireproof covering material 12 .

According to the fourth embodiment, in addition to the effects (1-1) to (1-6) described in the first embodiment and the effects (2-1) described in the second embodiment, the following The actions and effects described can be obtained.

(4-1) The refractory material 23 is exposed when the gaps of the wooden plate portion 21 are burned. After that, even if the joined portion of the refractory material 23 is thermally decomposed, the flame penetration prevention corner portion 22 is exposed. As a result, flames can be prevented from entering the inside of the wooden fireproof covering material 12 .

(4-2) The flame penetration preventing corner portion 22 is joined to the wooden plate portion 21 and the refractory material 23 . As a result, even if the wooden plate portion 21 burns down, the position of the flame penetration preventing corner portion 22 is maintained. As a result, it is possible to effectively suppress the penetration of flame into the wooden fireproof covering material 12 through the gaps of the fireproof material 23 .

The first to fourth embodiments of the fire-resistant structure and the construction method of the fire-resistant structure have been described above. It can be changed as appropriate. For example, the first to fourth embodiments and the following modifications can be implemented in combination with each other within a technically consistent range.

• The refractory structure 10, 40, 50, 60 may be applied to walls.
- Each edge 26, 30, 42, 52, 64 may be filled with a refractory filler or a high heat capacity material such as mortar instead of the filler wood 27, 31, 43, 53, 65. good too. Moreover, the attachment member 25 , the corner joint member 29 , the plate member joint member 41 , the joint member 51 , and the fixing member 63 may be driven directly from the outer peripheral surface of the wooden fireproof covering member 12 .

• The flame entry prevention corner 22 may be configured to be connected to a retaining refractory structure that retains the ends of each refractory structure 10,40,50,60. According to such a configuration, the wooden fireproof covering material 12 can be assembled at the construction site without using a heat transfer material.

・The fireproof structure should have the appearance of a polygonal column. Therefore, the fire-resistant structures 10, 40, 50, and 60 are not limited to having a quadrangular prism shape in appearance, but may have a triangular prism shape or a pentagonal prism shape in appearance.

- In 2nd Embodiment, the two L-shaped sets 45 were manufactured in the manufacturing step, and the steel material 11 was enclosed with the two L-shaped sets 45 in the surrounding step. Not limited to this, the cornered wooden plate portion set 44 manufactured in the manufacturing step may be sequentially joined in the enclosing step.

Specifically, after arranging the first wooden board set 44 with corners, the second wooden board set 44 with corners is arranged so as to be orthogonal to the first set of wooden boards with corners 44 . to place. Then, the first and second cornered wood plate portion sets 44 are joined with the corner joining members 28 and 29 and the plate portion joining member 41 . In the same manner, the third set of wooden boards 44 with corners is joined to the second set of wooden boards 44 with corners. Then, after arranging the fourth wooden board part set 44 so as to be fitted in the first wooden board part set 44 with corners and the third wooden board part set 44 with corners, the corner joining material is 28 and 29 are joined with a plate portion joining material 41 . Even with such a configuration, the flame penetration prevention corner 22 can function as a guide.

- As shown in FIG. In this case, the mounting member 25 is joined to the mounting member 13 so as to pass through the refractory material 23 . That is, the heat transfer material composed of the mounting member 13 and the mounting member 25 connects only the refractory material 23 to the steel material 11 . According to such a configuration, the burnt wooden board portion 21 is easily peeled off from the refractory material 23, so that the temperature rise of the refractory material 23 and the steel material 11 due to the combustion heat of the wooden board part 21 can be suppressed. In addition, since the heat load on the fireproof material 23 can be reduced, the number of mounting members 25 can be reduced.

DESCRIPTION OF SYMBOLS 10... Fire-resistant structure 11... Steel material 12... Wooden fire-resistant covering material 13... Attachment member which comprises a heat-transfer material 14... Air layer 21... Wood board part 21A... Wood board part 21B... Wood board part, 22... Flame penetration prevention corner, 23... Refractory material, 25... Mounting material constituting heat transfer material, 26... Mounting edge, 27... Filling wood, 28, 29... Corner joining material, 30... Corner joining edge , 31... Filler tree, 35A... Cornered wooden board part set, 35B... Cornerless woody board part set, 40... Fire resistant structure, 41... Plate part joining material, 42... Plate part jointing edge, 43... Filler tree, 45 ... L-shaped set, 45A ... First L-shaped set, 45B ... Second L-shaped set, 50 ... Fire-resistant structure, 51 ... Jointing material, 52 ... Jointing edge, 53 ... Buried wood, 60 ... Fire-resistant structure, 62 ... Jointing material, 63 ... fixing material, 64 ... fixing edge, 65 ... filler.

Claims (9)

A fire-resistant structure having a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer,
The wooden fireproof coating material includes four wooden plate portions, a flame penetration prevention corner portion provided at a joint portion of the adjacent wooden plate portions, and a fireproof portion provided facing the air layer side of the wooden fireproof coating material. having a material and
The flame penetration prevention corner presses and closes the joints of the adjacent refractory materials, and has an equilateral orthogonal surface whose surface that contacts the orthogonal surface of the refractory material that is orthogonal to each other is equilateral,
A heat transfer member penetrating the air layer, having one end connected to the steel material, the other end embedded in the wooden fireproof covering material, and for transferring heat from the woody fireproof covering material to the steel material.
Fire resistant construction. A fire-resistant structure having a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer,
The woody fireproof covering material comprises three or more woody plate portions, a flame penetration prevention corner portion provided at a joint portion between the adjacent woody plate portions, and a woody fireproof covering facing the air layer side. a refractory material made of
The flame penetration prevention corner presses and closes the joints of the adjacent refractory materials,
a fixing member penetrating through the refractory material and fixing the flame-intrusion prevention corner portion and the wooden plate portion;
The fixing member includes a head for locking one of the flame penetration prevention corner or the wooden board, a penetrating part that penetrates into the other of the flame penetration prevention corner or the wooden board, has
A heat transfer member penetrating the air layer, having one end connected to the steel material, the other end embedded in the wooden fireproof covering material, and for transferring heat from the woody fireproof covering material to the steel material.
Fire resistant construction. A fire-resistant structure having a steel material, an air layer surrounding the steel material, and a wooden fire-resistant coating material surrounding the air layer,
The woody fireproof covering material comprises three or more woody plate portions, a flame penetration prevention corner portion provided at a joint portion between the adjacent woody plate portions, and a woody fireproof covering facing the air layer side. a refractory material made of
The flame penetration prevention corner presses and closes the joints of the adjacent refractory materials,
a fixing member penetrating through the refractory material and fixing the flame-intrusion prevention corner portion and the wooden plate portion;
The fixing materials are a first fixing material and a second fixing material,
The first fixing member has a first head portion that locks the flame penetration prevention corner portion and a first through-entry portion that penetrates into the wooden plate portion,
The second fixing member has a second head portion that locks the wooden plate portion, and a second penetration portion that penetrates into the flame penetration prevention corner portion. Fireproof structure. 4. A heat transfer material penetrating the air layer, having one end connected to the steel material, the other end embedded in the wooden fireproof covering material, and for transferring the heat of the woody fireproof covering material to the steel material. Fire resistant construction as described. The fireproof structure according to any one of claims 1 to 4, wherein the flame penetration prevention corner is made of steel pipe or angle material, mortar bar, or calcium silicate material. The fire resistant structure according to any one of claims 1, 2 and 4, wherein the steel material is connected to the fire resistant material only by the heat transfer material. The fire resistant structure according to claim 6, wherein the heat transfer material connects only the fire resistant material to the steel material. having a filler at the edge of the other end of the heat transfer material,
The fire-resistant structure according to any one of claims 1, 2, and 4, wherein the embedded wood functions as part of the wooden fire-resistant covering material. The fire resistance according to any one of claims 1 to 4 , wherein the steel material is a steel pipe material, has a concrete material inside the steel pipe material, and the steel pipe material and the concrete material form a steel pipe concrete structure. structure.

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