JP2020033858A - Fireproof structural member and manufacturing method of the same - Google Patents

Abstract

To provide a fireproof structural member which can exert a fireproof performance needed to prevent a collapse or a fire spread of a building by a termination of a fire while being easy for manufacturing, disposal and recycling.SOLUTION: A fireproof structural member 1 according to the invention comprises: a core material 2 in a column shape subject to a load; and a sheath material 3 for covering an outer periphery part 2a of the core material 2 along a longitudinal direction. The sheath material 3 is integrally formed in a square cylindrical shape and consists of a wood applied with a flame proofing treatment, and the outer periphery part 2a of the core material 2 is engaged into an inner periphery part 3b of the sheath material 3. The sheath material 3 can prevent a flame from reaching the core material 2 suitably and can exert an effective fireproof performance. In addition, the fireproof structural member can be easily abandoned or recycled because of its simple structure.SELECTED DRAWING: Figure 1

Description

  The present invention is a fire-resistant structural member, that is, a structural member used for a pillar or a beam supporting a building, and exhibits a fire-resistant performance required to prevent the building from collapsing or spreading until the end of the fire in a fire. Related members.

  As a conventional structural member, a structural member including a prismatic core material supporting a load or the like and a sheath material covering an outer peripheral portion of the core material is known, and when wood is used for the core material and / or the sheath material, What is important is how to make wood that is originally inferior in fire resistance to flame retardant.

  The fire-resistant structural member shown in FIG. 1 of Patent Document 1 has a structure in which wood is used as a core material and a sheath material, and a gypsum board as a non-combustible material is interposed between the core material and the sheath material. Even if it burns out, the gypsum board does not expose the core material directly to the flame, thereby improving fire resistance.

  The fire-resistant structural member shown in FIG. 17 of Patent Document 2 uses wood as a core material and a sheath material, and has a configuration in which an air layer is interposed between the core material and the sheath material, until the sheath material is burned out. During this period, the heat insulation by the sheath material and the heat insulation by the air layer keep the temperature of the core material below the ignition temperature to improve the fire resistance performance.

Japanese Patent No. 4359275 JP 2013-204261 A

  In the fire-resistant structural member of Patent Document 1, since it is essential to have a configuration in which a gypsum board is interposed between the core material and the sheath material, a step of bonding the gypsum board to the outer peripheral surface of the core material is required. Further, a step of bonding a sheath material to the outer surface of the gypsum board is required, and there is a problem that the manufacturing process becomes very complicated. In addition, there is also a problem that a large amount of scum appears when processing the gypsum board.

  Further, it is obvious that the refractory structural member of Patent Document 1 in which the core material, the gypsum board, and the sheath material are laminated and bonded is difficult to dispose or recycle.

  On the other hand, in the fire-resistant structural member of Patent Document 2, a sheath material is disposed at a fixed interval from the core material, and the sheath material is formed by fixing four flame-retardant plate members with screws, bolts, or the like. It is configured to be detachably joined by a method. Therefore, the sheath material can be easily manufactured, and thus the structural member can be easily manufactured. Further, since the sheath can be easily disassembled, it is easy to dispose or recycle.

  However, in the fire-resistant structural member of Patent Document 2, a gap is formed between the detachably joined plate materials, and a flame is generated from the gap, no matter how much the respective plate materials constituting the sheath material are made flame-retardant. There is a problem in that the core material enters the core material and the influence of the flame is given to the core material.

  The present invention effectively solves the problems of the above-described conventional fire-resistant structural members, and provides a fire-resistant structural material that exhibits effective fire resistance while being easily manufactured, disposed and recycled, and a method for manufacturing the same. .

  In short, the refractory structural member according to the present invention includes a columnar core member that receives a load, and a sheath material that covers an outer peripheral portion of the core material along the longitudinal direction, and the sheath material is integrally formed in a rectangular cylindrical shape. It is made of molded and flame-retarded wood, and has a configuration in which the outer peripheral portion of the core material is fitted to the inner peripheral portion of the sheath material. Can be appropriately prevented from reaching, and effective fire resistance performance can be exhibited. In addition, because of the simple structure, disposal and recycling can be easily performed.

  Preferably, a laminated wood or a solid wood is used as the wood constituting the sheath material. Further, the core is made of steel or wood.

  More preferably, by forming a concave portion in the inner peripheral portion of the above-mentioned sheath material, it is possible to easily penetrate the flame retardant agent. In addition, the concave portion can define a heat insulating gap between the sheath material and the core material.

  In addition, the method for manufacturing a fire-resistant structural member according to the present invention includes a step of forming a sheath component by processing wood, and a step of forming the sheath component by combining the produced sheath component and bonding the same to form a square tubular sheath. A sheath material bonding step of producing the sheath material, a flame retarding treatment step of performing a flame retarding treatment on the sheath material produced by the sheath material bonding step, and a sheath material flame retarded by the flame retarding treatment step A core material is inserted into the inner peripheral portion of the core material, and the outer peripheral portion of the core material is fitted to the inner peripheral portion of the sheath material. be able to. Further, the fire-resistant structural member can be easily manufactured without requiring complicated steps.

  Preferably, the sheath component is made of laminated wood or solid wood. The core is made of steel or wood.

  In addition, by forming a concave portion in the inner peripheral portion of the sheath material before the flame-retardant treatment process, it is possible to easily penetrate the flame-retardant agent. In addition, the concave portion can define a heat insulating gap between the sheath material and the core material.

  ADVANTAGE OF THE INVENTION According to the fire-resistant structural member which concerns on this invention, despite having the simple structure which fitted the core material to the sheath material, it demonstrates the fire-resistant performance required in order to prevent a collapse or a fire spread of a building until the end of a fire. Can be.

  Further, according to the method for manufacturing a fire-resistant structural member according to the present invention, the sheath material can be effectively integrated and flame retarded. Therefore, the influence of the flame on the core material can be suppressed by the sheath material, and a fire-resistant structural member exhibiting necessary fire-resistant performance can be manufactured. Further, the fire-resistant structural member can be easily manufactured without requiring complicated steps.

It is a perspective view of the refractory structural member concerning the present invention. It is a disassembled perspective view which shows the combination of the sheath component of U-shaped cross section. It is a perspective view of the sheath material comprised by the sheath component material of FIG. It is a perspective view which shows the state which fits the outer peripheral part of a core material with the inner peripheral part of a sheath material. It is a disassembled perspective view which shows the combination of a plate-shaped sheath component. It is a perspective view of the sheath material comprised by the sheath component material of FIG. It is a perspective view which shows the refractory structural member which concerns on this invention which has the sheath material comprised by the sheath component material of FIG. It is a disassembled perspective view which shows the combination of a U-shaped sheath component and a plate-shaped sheath component. It is a perspective view of the sheath material comprised by the sheath component material of FIG. It is a perspective view which shows the refractory structural member which concerns on this invention which has the sheath material comprised by the sheath component material of FIG. It is a perspective view showing the refractory structural member concerning the present invention using H steel as a core material.

  Hereinafter, preferred embodiments of a refractory structural member and a method of manufacturing the same according to the present invention will be described with reference to FIGS.

  The fire-resistant structural member 1 according to the present invention is used as a pillar or a beam of a building, particularly a wooden building. As shown in FIG. 1, FIG. 7, FIG. 10 and FIG. And a sheath material 3 covering the outer peripheral portion 2a of the core material 2 along the longitudinal direction, and the outer peripheral portion 2a of the core material 2 is fitted to the inner peripheral portion 3b of the sheath material. It has a configuration that

  That is, as described later, the refractory structural member 1 according to the present invention merely inserts the core material 2 into the sheath material 3 and fits the core material 2 and the sheath material 3 together. It has a configuration that does not adhere to it. In addition, 5 in FIGS. 1, 7, 10 and 11 is a wedge, which is not essential, but can be more securely integrated by driving in as needed.

  The material of the core 2 in the present invention is not particularly limited as long as it is processed into a columnar shape and can appropriately receive a load, but wood or steel can be preferably used. As the wood, a laminated material using laminating wood already used as a structural member such as larch, pine, Japanese cedar, cypress, cypress, or hiba or a solid wood of the above-described wood can be used.

  Further, the cross-sectional shape of the core material 2 can be rectangular as shown in FIGS. Alternatively, for example, a shape other than a rectangular shape such as an H-shape shown in FIG. 11 can be used. In any case, the cross-sectional shape can be appropriately selected depending on the material, length, required strength, and the like of the core material 2.

  The sheath material 3 covers the outer peripheral portion 2a extending in the longitudinal direction of the core material 2 described above, and naturally has a length equal to the entire length of the core material 2, and is integrally formed into a rectangular tube shape. It is also made of wood that has been subjected to a flame retarding treatment. As the wood, as in the case of the core material 2, it is possible to use a glued laminated wood made of wood already used as a structural member such as larch, Japanese larch, cedar, hinoki, hiba or the like, or a solid wood of the wood exemplified above. . Note that the sheath material 3 also functions as a decorative material.

  Preferably, a concave portion 4 is formed in the inner peripheral portion 3 b of the sheath material 3, and the concave portion 4 can define a heat insulating gap between the sheath material 3 and the core material 2. The concave portion 4 can be formed by drilling a large number of holes in the inner peripheral portion 3b or by roughening the surface of the inner peripheral portion 3b.

  As described above, the refractory structural member 1 according to the present invention has a non-adhesive core-sheath structure in which the core material 2 is fitted to the sheath material 3. Since the sheath material 3 is made of wood which has been integrally molded into a rectangular cylindrical shape and has been subjected to flame retarding treatment, the sheath material 3 effectively functions as a burning margin layer in the event of a fire, and the core material 2 side It is possible to reliably prevent a flame from entering.

  Therefore, the fire resistance required for maintaining the structural strength of the core material 2 until the end of the fire can be exhibited, despite the simple structure.

  Next, a method for manufacturing the fire-resistant structural member 1 according to the present invention will be described step by step.

<Sheet component manufacturing process>
In this step, as shown in FIG. 2, the wood that can be used as the sheath material 3 described above is processed into a U-shaped column shape with a U-shaped cross section to produce a sheath component material 3A with a U-shaped cross section. . In processing, wood is cut so as to have a U-shaped cross section. By performing cutting before the flame-retardant treatment step described later, it is possible to prevent the generation of flame-retardant shavings that are difficult to dispose of.

  In the case where the wood is a laminated wood, it is optional to form a sheath member 3A having a U-shaped cross section by bonding lamina so that the cross section has a U shape.

  In addition, as shown in FIG. 5, instead of the above-described sheath-shaped component 3A having a U-shaped cross section, wood that can be used as the sheath 3 described above is processed into a long plate shape to form a plate-shaped component 3B. Is prepared. Alternatively, as shown in FIG. 8, a plate-shaped sheath configuration 3B is produced in addition to the above-described U-shaped sheath component 3A having a U-shaped cross section.

  Further, in this step, the inner corner portion 3Ab of the corner-shaped portion 3Ab and the inner surface portion 3Bb of the plate-shaped sheath component 3B that define the corner of the U-shaped sheath component 3A, that is, the inner peripheral portion 3b of the sheath material 3 A plurality of holes are formed in the surface to be formed, or the surface is shaved and roughened to form the recess 4. As described above, the concave portion 4 defines an insulating gap between the sheath material 3 and the core material 2 after production, and penetrates a flame retardant agent in a flame retardant treatment step described later. It can be easier.

<Sheet component bonding process>
In this step, as shown in FIG. 3, a pair of U-shaped sheath components 3A formed in the above-described sheath component production process are directly combined and bonded via an adhesive.

  The adhesive to be used is an adhesive for a laminated material typified by a resorcinol adhesive, and strongly adheres the U-shaped sheath constituting members 3A having a U-shaped cross section to be integrated into a rectangular cylindrical shape. Therefore, they can be integrated without generating a gap into which the flame enters.

  The sheath member 3 as shown in FIG. 3 is produced by the pair of sheath members 3A having the U-shaped cross section integrated as described above. Therefore, the inner corner portion 3Ab of the sheath component 3A constitutes the inner peripheral portion 3b of the sheath material 3, and the outer corner surface portion 3Aa constituting the outer corner of the sheath component 3A constitutes the outer peripheral portion 3a of the sheath material 3.

  Further, in this step, as shown in FIG. 6, the four plate-shaped sheath forming members 3B created in the above-described sheath forming member forming step are directly combined and firmly bonded via the glue for glue glue described above. A tubular sheath material 3 can also be produced. Therefore, it is possible to manufacture an integrated rectangular tubular sheath material 3 without any gap into which the flame enters.

  The sheath material 3 as shown in FIG. 6 is produced by the four plate-like sheath components 3B integrated in this manner. Therefore, the inner surface 3Bb of each plate-shaped sheath component 3B constitutes the inner peripheral portion 3b of the sheath material 3, and the outer surface portion 3Ba of each plate-shaped sheath component 3B constitutes the outer peripheral portion 3a of the sheath material 3.

  Further, in this step, as shown in FIG. 9, a pair of sheath-shaped components 3A having a U-shape in cross section are bonded together via a plate-shaped component 3B to form a rectangular tubular sheath 3. You can also.

  In this manner, by using the U-shaped sheath component 3A and the plate-shaped sheath component 3B in combination, it is possible to make the U-shaped sheath component 3A compact, and to manufacture the above-mentioned sheath component. In the process, the amount of shavings generated when the cutting process is performed to produce the U-shaped sheath constituting member 3A having a U-shaped cross section can be suppressed, and the cutting process itself can be simplified. In addition, it is possible to appropriately cope with a case where the cross-sectional area of the core material 2 is large.

  Also, when combining the U-shaped sheath component 3A and the plate-shaped sheath component 3B with the U-shaped cross-section, the U-shaped sheath component 3A and the plate-shaped sheath component 3B are used as the adhesive by using an adhesive for a laminated material. Is firmly adhered. Thereby, it is possible to manufacture the rectangular tubular sheath material 3 which has no gap into which the flame enters.

  The sheath material 3 as shown in FIG. 9 is produced from the pair of sheath components 3A and the pair of plate-shaped sheath components 3B integrated in this manner. Therefore, the inner corner portion 3Ab of the sheath member 3 and the inner corner portion 3Ab of the U-shaped sheath component member 3A and the inner surface portion 3Bb of the plate-shaped sheath component material 3B constitute the inner peripheral portion 3b of the sheath member 3. Outer corner 3Aa of 3A and outer surface 3Ba of plate-shaped sheath component 3B constitute outer peripheral portion 3a of sheath 3.

  In the method for manufacturing the refractory structural member 1 according to the present invention, the present step, that is, the bonding step using the glue for the glued laminate is performed before the flame-retardant treatment step described below, whereby Adhesion failure due to the occurrence does not occur.

  Further, in this step, the wedges 5 are driven into the bonding portions, so that they can be integrated more reliably.

<Flame retardant treatment process>
This step is a step of subjecting the sheath material 3 produced by the above-mentioned sheath component bonding step, that is, the already integrated sheath material 3, to a flame retarding treatment.

  The flame-retarding treatment is carried out by infiltrating the sheath material 3 with a phosphoric acid-based, halogen-based or boric acid-based agent, or a mixture thereof, by a known decompression / pressurization method, a hot / cold bath method, or an immersion method. Do. At this time, the flame retardant agent easily penetrates into the inside of the sheath material 3 by the concave portion 4, and the sheath material 3 can be reliably made flame retardant.

<Mating process>
Finally, as shown in FIG. 4, in this step, the entire length or a partial length of the core material 2 is inserted into the inner peripheral portion 3 b of the sheath material 3 which has been subjected to the flame retarding treatment, The outer peripheral portion 2a of the core 2 is fitted to the portion 3b. Thereby, the fire-resistant structural member 1 according to the present invention shown in FIG. 1 is completed. Although not specifically shown, the fire-resistant structural member 1 according to the present invention having the sheath material 3 using the plate-shaped sheath component material 3B shown in FIG. A fire-resistant structural member 1 according to the present invention including a sheath material 3 using a U-shaped sheath component material 3A and a plate-shaped sheath component material 3B, and according to the present invention using an H steel material as a core material 2 shown in FIG. The refractory structural member 1 is also completed through a similar fitting process.

  As described above, according to the method for manufacturing the refractory structural member 1 according to the present invention, the sheath material 3 can be effectively integrated and flame retarded. Therefore, the core material 2 of the refractory structural member 1 manufactured by the manufacturing method is effectively integrated and the flame retardant sheath material 3 is covered. Can be demonstrated.

  Moreover, the method for manufacturing the fire-resistant structural member 1 according to the present invention can easily manufacture the fire-resistant structural member without requiring complicated steps.

DESCRIPTION OF SYMBOLS 1 ... Fire-resistant structural member, 2 ... Core material, 2a ... Outer peripheral portion of core material, 3 ... Sheath material, 3a ... Outer peripheral portion of sheath material, 3b ... Inner peripheral portion of sheath material, 3A ... U-shaped cross section Sheath constituent material, 3Aa ... Outer corner surface portion of cross-section U-shaped sheath constituent material, 3Ab ... Enter corner surface portion of cross-sectional U-shaped sheath constituent material, 3B ... Plate-shaped sheath constituent material, 3Ba ... Plate-shaped sheath structure Outer surface portion of material, 3Bb: inner surface portion of plate-shaped sheath constituting material, 4: concave portion, 5: wedge.

In short, the refractory structural member according to the present invention includes a columnar core member that receives a load, and a sheath material that covers an outer peripheral portion of the core material along the longitudinal direction, and the sheath material is integrally formed in a rectangular cylindrical shape. together consist of molded and flame retardant treatment is performed timber, while having a configuration in which the outer peripheral portion of the core member is fitted to the inner peripheral portion of the square tubular sheath member, the rectangular cylindrical shape It has a configuration in which the inner peripheral portion of the sheath material and the outer peripheral portion of the core material are not bonded to each other, and the sheath material can appropriately prevent the flame from reaching the core material and exhibit effective fire resistance. be able to. In addition, because of the simple structure, disposal and recycling can be easily performed.

In addition, the method for manufacturing a fire-resistant structural member according to the present invention includes a step of forming a sheath component by processing wood, and a step of forming the sheath component by combining the produced sheath component and bonding the same to form a square tubular sheath. And a flame-retarding treatment step of applying a flame-retarding treatment to the rectangular tubular sheath material produced by the sheath-constituting material joining step. Meanwhile, the angle and a fitting step of fitting the outer peripheral portion of the core member in the inner peripheral portion of the square tubular sheath member to insert the core into the inner peripheral portion of the angular tubular sheath member By eliminating the step of bonding between the inner peripheral portion of the cylindrical sheath material and the outer peripheral portion of the core material, it is possible to make the sheath material flame-retardant while reliably integrating the sheath material. Further, the fire-resistant structural member can be easily manufactured without requiring complicated steps.

Claims (8)

  It is provided with a pillar-shaped core material that receives a load, and a sheath material that covers an outer peripheral portion of the core material along the longitudinal direction, and the sheath material is made of wood that has been integrally molded into a rectangular cylindrical shape and that has been subjected to a flame-retardant treatment. A fire-resistant structural member, wherein an outer peripheral portion of the core material is fitted to an inner peripheral portion of the sheath material.   The fire-resistant structural member according to claim 1, wherein the wood constituting the sheath material is a laminated wood or a solid wood.   The fire-resistant structural member according to claim 1, wherein the core material is made of steel or wood.   The fire-resistant structural member according to any one of claims 1 to 3, wherein a concave portion is formed in an inner peripheral portion of the sheath material.   A sheath component producing step of processing wood to produce a sheath component, a sheath component adhering step of combining and joining the produced sheath components to produce a rectangular tubular sheath, and the sheath component adhering. A flame-retarding treatment step of performing a flame-retarding treatment on the sheath material produced by the step, and inserting a columnar core material into an inner peripheral portion of the sheath material flame-retarded by the flame-retarding treatment step. And a fitting step of fitting an outer peripheral portion of the core material to an inner peripheral portion of the core member.   6. The method for manufacturing a fire-resistant structural member according to claim 5, wherein the sheath component is made of a laminated material or a solid material.   6. The method according to claim 5, wherein the core is made of steel or wood.   The method for manufacturing a fire-resistant structural member according to any one of claims 5 to 7, wherein a concave portion is formed in an inner peripheral portion of the sheath before the flame-retarding treatment step.

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