JP5080354B2 - Fireproof material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fireproofing material that makes it possible to prevent it from being instantaneously destroyed by fire together with a wiring material or a piping material and can close a gap between a wall and a wiring material or a piping material to fulfill a fireproofing function. <P>SOLUTION: The fireproofing material 11 is filled in a gap between a penetrated portion formed in a compartment wall and a wiring material or a piping material passed through the penetrated portion. The fireproofing material 11 is formed by housing a cushioned and incombustible block body 12 in a pouched armoring member 13 formed of a material that is predominantly composed of a soft synthetic resin material and has fire-resistive performance and is expanded by heat. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a refractory treatment material filled between a penetration part formed in a fire prevention compartment of a building and a wiring / pipe material inserted into the penetration part.

  2. Description of the Related Art Conventionally, a through-hole is formed in a fire prevention compartment wall in order to allow wiring / piping materials to penetrate through the fire prevention compartment wall as a fire prevention compartment in a building. A fireproofing treatment is performed between the through hole and the wiring / pipe material on the fireproof partition wall. This fireproofing treatment is provided, for example, to prevent inflow of flame, smoke, or toxic gas to the other side through the through-hole when a fire or the like occurs on the front side of one wall across the fire prevention partition wall. It has been. In other words, the fireproofing process closes the space between the through hole and the wiring / piping material in the event of a fire, etc., thereby preventing the flow of flame, smoke, or toxic gas to the opposite side of the fire. ing.

As such a fireproofing treatment, there is a method in which a fireproofing treatment material is filled between the through hole and the wiring / piping material. Examples of the fireproofing material include a fireproofing filler disclosed in Patent Document 1. This fireproofing filler is made by laminating a soft thermal expansion refractory material sheet on a ceramic fiber blanket that is sized to fit between the through hole and the wiring / piping material. Wrapped with a resin cloth or film.
JP 2002-247735 A

  However, in the fireproofing filler disclosed in Patent Document 1, the synthetic resin cloth or film that wraps the laminate is made of a combustible material such as nylon, polyester, or polypropylene. For this reason, if the wiring / piping material burns when a fire or the like occurs, the synthetic resin cloth or film is also burned out together with the wiring / piping material. Further, when the surface temperature of the wiring / piping material (for example, cable) becomes high due to heat from a fire or the like, the synthetic resin cloth or film is ignited by the heat of the wiring / piping material, and the synthetic resin cloth or film is burned out. As a result, a synthetic resin cloth or film is burnt out, and a gap is formed between the wiring / pipe material and the filler for fire prevention treatment. This gap becomes an inflow path for flame, smoke, and toxic gas, and exhibits a fire resistance function. There is a possibility that it cannot be done. In addition, if the synthetic resin cloth or film is burned out, the laminated state of the ceramic fiber blanket and the soft thermal expansion refractory material sheet cannot be maintained, and the ceramic fiber blanket and the soft thermal expansion refractory material sheet will collapse from the through hole, causing penetration. There is a risk that the gap between the hole and the wiring / piping material cannot be closed.

  The present invention has been made in view of the above-described conventional problems, and the object thereof is to prevent immediate burning together with the wiring / piping material, and to close the space between the wiring / piping material. An object of the present invention is to provide a fireproofing material capable of exhibiting a fireproofing function.

In order to solve the above-mentioned problem, the invention according to claim 1 is a fireproof filling between a penetration part formed in a fire prevention compartment part of a building and a wiring / piping material inserted into the penetration part. A block material with cushioning properties and nonflammability, which is a treatment material, is housed in a bag-shaped exterior member made of a material that has fire resistance and expands by heat, mainly composed of a soft synthetic resin material excluding rubber. The gist is that it was formed.

The gist of the invention according to claim 2 is that, in the refractory treatment material according to claim 1, the block body is wrapped by the exterior member so as not to fall out of the exterior member.
The gist of the invention described in claim 3 is that, in the fireproofing material according to claim 2, air holes are formed in the exterior member.

The invention according to claim 4 is the refractory treatment material according to any one of claims 1 to 3, wherein the outer surface of the exterior member is provided with a plurality of scales. To do.
The invention according to claim 5 is the refractory treatment material according to any one of claims 1 to 4, wherein the cutting is performed to cover the block body exposed from the cut end of the refractory treatment material. The gist of the invention is to provide a lid that is externally mounted on the end.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent burning out with a wiring and piping material immediately, can close between wiring and piping materials, and can exhibit a fireproof function.

Hereinafter, an embodiment of a fireproof material embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, the fireproofing material 11 is used by being filled into a through-hole 34 formed in a fireproof compartment wall W as a fireproof compartment. As shown in FIG.2 and FIG.3, the fireproof processing material 11 is formed in the rectangular parallelepiped shape. And the fireproof material 11 is accommodated in the rectangular box-shaped exterior member 13 which consists of the material which has a fireproof performance and expand | swells with heat while the whole block body 12 (refer FIG. 3) formed in the rectangular parallelepiped shape. Is formed. That is, the block body 12 is substantially entirely wrapped by the exterior member 13, so that it cannot be removed from the exterior member 13. The block body 12 and the exterior member 13 are integrated so as not to be separated.

  The block body 12 forming the refractory treatment material 11 is formed in a rectangular parallelepiped shape by a nonflammable material such as ceramic wool or rock wool, and the block body 12 itself has a cushioning property and has a required elasticity. . That is, the block body 12 can be compressed and deformed, and can be restored to its original shape from the compressed and deformed state.

  The exterior member 13 forming the fireproofing material 11 is mainly composed of a soft synthetic resin material, and further comprises a flame retardant material in which an inorganic material and an expansion material are mixed in the soft synthetic resin material. It is made of a material that expands. Examples of soft synthetic resin materials include olefin resins, vinyl chloride resins, ethylene-vinyl acetate copolymer resins (EVA), etc., calcium carbonate as an inorganic material, and heat of 120 ° C. or more as an expanding material. And graphite whose volume expands to 3 times or more of that before heating. Such a flame retardant material is, for example, a soft synthetic resin material that is adjusted at a ratio of 40% of the total weight of the flame retardant material, inorganic material 40%, and expansion material 20%. .

  The exterior member 13 is formed in a square box shape corresponding to the outer shape of the block body 12. A direction orthogonal to the length direction of the exterior member 13 is formed on the outer surfaces (only one surface is shown in FIGS. 2 and 3) of the two largest surfaces facing each other among the six surfaces forming the exterior member 13. A plurality of graduations 13a extending in the direction of the length of the exterior member 13 are provided at regular intervals. In addition, air holes 13b that communicate the inside and the outside of the exterior member 13 are formed at a plurality of locations (four locations in the present embodiment) on the two surfaces.

  And in order to manufacture the fireproof processing material 11 using the block body 12 and the exterior member 13, the square box-shaped exterior member 13 as shown in FIG. 2 is manufactured first. Next, the one side part in the length direction of the exterior member 13 is cut | disconnected from the position shown to the dashed-two dotted line of FIG. That is, the exterior member 13 is separated into a bag-like member having an opening and a lid member that closes the opening. And the block body 12 is accommodated in the inner side from the opening part of a bag-shaped member, and the said cover member is welded to a bag-shaped member. Then, the exterior member 13 is formed in a square box shape, and the entire block body 12 is wrapped by the exterior member 13, and the block body 12 and the exterior member 13 are integrated. The reason why almost the entire block body 12 is covered by the exterior member 13 is that a part of the block body 12 is exposed from the exterior member 13 through the air holes 13b.

  Next, a method for applying a fireproof treatment to the fireproof wall W using the fireproof material 11 will be described. First, as shown in FIG. 4, a penetration part 34 for allowing the wiring / pipe material 33 to penetrate the fire prevention partition wall W is formed. The penetration part 34 penetrates the fire prevention partition wall W in the thickness direction, and communicates one wall front side of the fire protection partition wall W with the other wall front side. Then, the wiring / pipe material support rack 20 is disposed in the penetrating portion 34. Next, the wiring / piping material support rack 20 supports a plurality of wiring / piping materials 33, and the wiring / piping material 33 penetrates through the fire prevention wall W. The wiring / pipe material 33 is a general term for wiring (control cables, coaxial cables, optical cables, etc.) and piping materials (synthetic resin flexible cable tubes, steel cable tubes, etc.) arranged in the building. That is.

  Then, as shown in FIG. 1, a large number of refractory treatment materials 11 are filled between the inner peripheral surface of the through portion 34 and the outer surface of the wiring / pipe material 33. That is, a plurality of refractory treatment materials 11 are filled according to the size of the penetrating portion 34 in the horizontal direction, and a plurality of refractory treatment materials 11 are filled according to the size of the penetrating portion 34 in the vertical direction. The refractory treatment materials 11 adjacent to each other in the vertical direction and the horizontal direction of the penetrating part 34 are in pressure contact with each other in the vertical direction and the horizontal direction in order to eliminate a gap.

  The fireproof material 11 can be compressed and deformed because the block body 12 has cushioning properties, and the exterior member 13 can also be deformed because it mainly comprises a soft synthetic resin material. Furthermore, the exterior member 13 is formed with an air hole 13 b for allowing the air in the exterior member 13 to escape to the outside of the exterior member 13. And the fireproof processing material 11 can be compressively deformed, and is filled in the penetration part 34 in the compressive deformation state. For this reason, the refractory treatment material 11 filled in the penetrating portion 34 is pressed against the exterior member 13 serving as the outer surface of the refractory treatment material 11 adjacent in the vertical direction and the horizontal direction by the restoring force from the compression deformation state to the original shape. Yes. Furthermore, the press-contacted exterior members 13 are not easily slipped from each other, and the refractory treatment material 11 filled in the through portion 34 is prevented from being displaced. The outer surface of the exterior member 13 of the fireproof material 11 is in pressure contact with the outer surface of the wiring / pipe material 33.

  In addition, in the vertical direction and the horizontal direction of the through portion 34, the size of the fireproof material 11 is smaller than between the fireproof materials 11 or between the inner peripheral surface of the through portion 34 and the wiring / pipe material support rack 20. When a gap is formed, the refractory treatment material 11 is filled according to the size of the gap. That is, the fireproof material 11 is cut into a required size and used. When cutting the refractory material 11, the refractory material 11 can be cut using the scale 13 a as an index. When the cut refractory material 11 is filled in the penetration part 34, the refractory treatment material 11 contacts the penetration part 34 so that the exterior member 13 of the adjacent refractory treatment material 11 is pressed against the exposed surface of the block body 12. Filled. Further, a slight gap formed between the wiring / piping material support rack 20 and the wiring / piping material 33 or between the wiring / piping materials 33 is filled with a heat-expandable heat-resistant sealing material (not shown). The

  Now, in a building in which fireproofing treatment is applied to the fire prevention compartment wall W, it is assumed that a fire or the like has occurred on one wall front side of the fire prevention compartment wall W, and the wiring / pipe material 33 has burned. At this time, it is the exterior member 13 of the refractory treatment material 11 that is in pressure contact with the outer surface of the wiring / piping material 33. And the exterior member 13 consists of a flame-retardant material which has the property to expand | swell by heat while having fireproof performance. For this reason, the exterior member 13 is not immediately burned away by heat generated by a fire or the like or heat generated from the wiring / pipe material 33, and the exterior member 13 expands by receiving heat. Moreover, since the block body 12 is formed from the material which has nonflammability, when the exterior member 13 expand | swells, the block body 12 does not burn.

  Then, the heated exterior member 13 expands toward the wiring / pipe material 33 and is melted by heat, and the adjacent exterior members 13 are thermally welded to form a plurality of refractory treatment materials 11 as one lump. The wiring / pipe material 33 and the penetrating part 34 are hermetically closed between the two fireproof treatment bodies. That is, the gap between the outer surface of the wiring / pipe material 33 and the through-hole 34 becomes a path of flame, smoke, toxic gas, and heat, and flame, smoke, toxic gas, and heat are transferred to the other wall surface side of the fire prevention partition wall W. Transmission is prevented, and the fireproofing material 11 exerts a fireproofing function.

According to the above embodiment, the following effects can be obtained.
(1) The fire-resistant treatment material 11 is wrapped in an exterior member 13 made of a non-flammable block body 12 mainly composed of a soft synthetic resin material, which has fire resistance and expands by heat (a flame retardant material). Is formed. For this reason, when a fire or the like occurs in the fireproof partition wall W subjected to fireproofing treatment using the fireproofing material 11, the wiring / pipe material 33 burns or the surface temperature of the wiring / pipe material 33 becomes high. In addition, it is possible to prevent the exterior member 13 that is in contact with the wiring / pipe material 33 from being immediately burned together with the wiring / pipe material 33. And the exterior member 13 expand | swells by heat, such as a fire, and seals between the penetration part 34 and the wiring and piping material 33, and prevents that a clearance gap is formed. Further, when the refractory treatment material 11 is heated, the adjacent exterior members 13 are thermally welded, and the plurality of refractory treatment materials 11 are integrated into a single lump. For this reason, since the exterior member 13 does not burn out immediately, it is prevented that the block body 12 in the exterior member 13 falls off from the penetration part 34, or collapses. Therefore, the fireproofing material 11 can prevent the penetration part 34 from being an inflow path of flame, smoke, toxic gas, and heat, and can reliably exert the fireproof function in the fireproof partition wall W.

  (2) When the refractory treatment material 11 is heated, the adjacent exterior members 13 are thermally welded together, and the plurality of refractory treatment materials 11 are integrated into one lump. For this reason, when the refractory material 11 is heated, the gap between the adjacent refractory materials 11 is completely eliminated, and the space between the wiring / pipe material 33 and the penetrating portion 34 is completely hermetically closed. be able to. Moreover, when each refractory treatment material 11 expand | swells with a heat | fever, adjacent refractory treatment materials 11 are mutually pressed, and there exists a possibility that the force in the direction where the refractory treatment material 11 may drop out from the inside of the penetration part 34 may act. However, since the exterior members 13 of the adjacent fire-resistant treatment materials 11 are thermally welded and the plurality of fire-resistant treatment materials 11 are integrated, even if the fire-resistant treatment materials 11 are pressed, they are prevented from falling out of the through portion 34. can do.

  (3) The fire-resistant treatment material 11 is wrapped with an exterior member 13 made of a material (a flame-retardant material) in which a block body 12 having cushioning properties is mainly composed of a soft synthetic resin material and has fire-resistance performance and expands by heat. It is rarely formed. For this reason, the refractory treatment material 11 can be compressed and deformed, and the adjacent refractory treatment materials 11 can be brought into pressure contact with each other by returning the refractory treatment material 11 to the original shape in a state where the penetrating portion 34 is filled. Furthermore, the exterior member 13 is soft, and it is difficult to slip each other when the exterior members 13 are in contact with each other. Therefore, it can prevent that the refractory material 11 with which the penetration part 34 was filled falls from the penetration part 34, or a position shift, and can maintain a fireproof processing structure.

  (4) Air holes 13 b are formed in the exterior member 13. For this reason, the air in the exterior member 13 can be discharged out of the exterior member 13 from the air hole 13b, and the fireproof material 11 can be easily compressed and deformed, and can be returned to the original shape. Can do.

  (5) A scale 13 a is displayed on the outer surface of the exterior member 13. For this reason, the fireproof material 11 can be cut into a desired length by using the scale 13a as an index. Accordingly, the scale 13a is not displayed, and the cutting work of the refractory material 11 can be performed more easily than when the refractory material 11 is cut to a desired length using a ruler or the like.

  (6) The block body 12 and the exterior member 13 are not bonded. For this reason, the block body 12 can be freely deformed in the exterior member 13, and the fireproof material 11 can be easily compressed and deformed.

  (7) The fireproof material 11 is wrapped by an exterior member 13 made of a material (flame retardant material) in which a non-flammable block body 12 has fireproof performance and expands by heat. For this reason, the entire fireproofing material 11 is not burned out at a stroke even by a fire or the like, and the fireproofing function of the penetrating portion 34 can be sufficiently exhibited.

  (8) The fireproofing material 11 is the exterior member 13 and is the structure which wrapped the block body 12 which has nonflammability, and is a laminated body of a ceramic fiber blanket and a soft thermal expansion fireproof material sheet like background art. The number of parts can be reduced as compared with a structure wrapped with a synthetic resin cloth or film. The exterior member 13 is a material mainly composed of a soft synthetic resin material and mixed with an inorganic material and an expansion material. For this reason, compared with the case where glass fiber, carbon fiber, etc. are used as the exterior member 13, the fireproof processing material 11 can be manufactured cheaply, for example.

  (9) The fireproof material 11 has the block body 12 entirely covered with the exterior member 13. For this reason, when the fireproof material 11 is heated, the block body 12 can be prevented from jumping out of the exterior member 13.

In addition, you may change the said embodiment as follows.
When the fireproof material 11 is cut into a required size and used, a lid 40 may be externally attached to the cut end of the fireproof material 11 as shown in FIG. The lid body 40 is formed in a bottomed square box shape that opens on one surface. The lid 40 is made of the same material as the exterior member 13 of the fireproof material 11. By comprising in this way, the block body 12 exposed from the cutting | disconnection edge part of the fireproof processing material 11 can be covered with the cover body 40. FIG. In addition, when a fire or the like occurs, the lid body 40 expands when heated, and is thermally welded to the adjacent exterior member 13 or lid body 40, so that it forms one lump together with the other refractory treatment material 11, and the penetrating portion 34. And the wiring / pipe material 33 can be hermetically closed. In addition, since the size of the cut end varies depending on whether the fireproof material 11 is cut along the length direction or cut along the direction orthogonal to the length direction, it matches the size of the cut end. Two types of lids 40 having different sizes are manufactured.

  (Circle) you may change the manufacturing method of the fireproof processing material 11 shown to embodiment as shown in FIG. That is, the exterior member 13 is formed in a square box shape in which one side surface of the long side among the six surfaces forming the exterior member 13 is opened, and the folding piece 13c is extended to the opening edge. Then, the block body 12 is accommodated inside the exterior member 13 from one side surface of the exterior member 13. Thereafter, the opening on one side surface of the exterior member 13 is closed while folding each folding piece 13c. Then, the exterior member 13 is formed in a square box shape, and the entire block body 12 is wrapped by the exterior member 13, and the block body 12 and the exterior member 13 are integrated. In order to accommodate the block body 12, the position of the opening formed in the exterior member 13 may be changed.

  In addition, in the form shown in FIG. 6, the outer surface of the exterior member 13 has been subjected to a graining process, giving a feeling of roughness. For this reason, it is easy to grip the fireproof material 11, and in the state where the outer surfaces of the exterior member 13 are in contact with each other in the penetrating part 34, it is difficult to slip each other.

  Further, in the fireproofing material 11 in which the outer surface of the exterior member 13 is subjected to the texture processing, the scale 13a is formed as follows. That is, on the outer surface of the exterior member 13, the position where the scale 13 a is formed is not subjected to texturing, and the other outer surface where the scale 13 a is not formed is subjected to texturing. Then, on the outer surface of the exterior member 13, the portion that is not subjected to the texture processing is formed in a smooth surface along a direction orthogonal to the length direction of the exterior member 13, and the scale 13 a is formed by the portion that forms the smooth surface. Is formed.

In the form shown in FIG. 6, only one air hole 13 b is formed at the center of one of the two largest surfaces among the six surfaces forming the exterior member 13.
○ As shown in FIG. 7, as a fire prevention section of a building, between a through-hole Va having a rectangular shape in plan view formed on the fire-prevention section floor V and a wiring / pipe material 33 inserted into the through-section Va. Alternatively, the fireproofing material 11 may be filled in and the fireproofing floor V may be fireproofed. In addition, the depth of the penetration part Va is the same as the length along the direction orthogonal to the length direction in the fireproof material 11. When comprised in this way, the construction member 50 is constructed in the fire prevention division floor V so that the inside of the penetration part Va may be crossed, and a support plate (not shown) is supported on the construction member 50. Note that the erection member 50 is erected on the fire prevention compartment floor V so that the portion that supports the support plate is located at the same height as the lower surface of the fire prevention compartment floor V.

  Then, the fireproof material 11 is supported on the support plate while being filled between the wiring / pipe material 33 and the penetration part Va so that the length direction thereof extends in the length direction of the penetration part Va. Then, as for many fireproof processing materials 11 supported on the support plate, while one side surface (upper surface) extended in the length direction is all located in the same height, it is located in the same height as the upper surface of the fire prevention division floor V. Is arranged.

  And when a fire etc. generate | occur | produce under the fire prevention division floor V, the exterior member 13 receives heat and expands, while the adjacent exterior members 13 are heat-welded, and the some fireproof processing material 11 becomes one lump shape. The wiring / pipe material 33 and the penetrating portion Va are hermetically closed by the fireproof processing body having one lump shape. Further, since the fireproof treatment body expanded as one lump is pressed against the inner surface of the penetration portion Va by the expansion and is supported by the erection member 50, the lump fireproof treatment body is discharged from the penetration portion Va to the fireproof compartment floor. It is prevented from dropping below V. Therefore, it is possible to prevent the penetration portion Va and the wiring / pipe material 33 from being hermetically closed between the penetration portion Va and the wiring / pipe material 33 by the lump-like fireproof treatment body, and to prevent the penetration portion Va from being an inflow path of flame, smoke, and toxic gas. The fireproof function in the fireproof compartment floor V can be surely exhibited.

  As shown in FIG. 8, as the fire prevention compartment, a through-hole 51 having a circular hole shape formed in the fire-proof compartment wall H having a hollow portion, and a wiring / pipe material 33 inserted into the through-part 51 The fireproofing material 11 may be filled in between, and the fireproof partition wall H may be fireproofed. The fire prevention partition wall H is constructed from a plurality of light-weight shaped steel materials (not shown) and a plurality of pairs of partition walls (gypsum board) 53 erected so as to sandwich the light-weight shaped steel materials. A hollow portion (not shown) is formed between the partition walls 53 facing each other with the lightweight steel member interposed therebetween.

  In the fire prevention partition wall H, a cylindrical sleeve 55 is disposed in the penetration part 51 along the peripheral surface of the penetration part 51. Then, the wiring / pipe material 33 is inserted into the through-hole 51, and the fireproof material 11 is filled between the sleeve 55 and the periphery of the wiring / pipe material 33 in the through-hole 51. In such a configuration, when the exterior member 13 of the fireproof material 11 expands when a fire or the like occurs, the sleeve 55 prevents the exterior member 13 from expanding toward the cavity. In addition, the fire-resistant treatment material 11 includes a cushioning block 12 surrounded by an exterior member 13 made of a soft synthetic resin material that has fire resistance and expands by heat (a flame-retardant material). Is formed. For this reason, the fireproofing material 11 can be easily compressed and deformed along the peripheral surface of the through-hole 51, or can be easily compressed and deformed to be pushed into the gap between the fireproofing materials 11, and the fireproofing treatment can be performed. The filling work to the penetration part 51 of the material 11 can be performed easily.

(Circle) the block body 12 and the exterior member 13 may be adhere | attached with the adhesive agent.
○ The scale 13a may be deleted.
In the refractory treatment material 11, if the block body 12 is not dropped from the exterior member 13, an opening may be formed in the exterior member 13 to expose the block body 12 to the outside of the exterior member 13.

  The refractory treatment material 11 does not have to be a rectangular parallelepiped shape, and the shape may be changed to a spherical shape, an octahedral shape, or a triangular pyramid shape.

The front view which shows the fire prevention division wall which performed the fireproof process of embodiment. The perspective view which shows the fireproof processing material of embodiment. Sectional drawing which shows the fireproofing material of embodiment. The front view which shows the fire prevention division wall before performing a fireproof process. The disassembled perspective view which shows the cutting | disconnection edge part and cover body of a fireproof processing material. The disassembled perspective view which shows another example of a fireproofing material. The top view which shows the state which gave the fireproof process to the fireproof division floor. The front view which shows the fire prevention division wall which performed the fireproof process.

Explanation of symbols

  H, W: fire prevention compartment wall as fire prevention compartment, V: fire prevention floor as fire protection compartment, 11: fireproofing material, 12: block body, 13 ... exterior member, 13a ... scale, 13b ... air hole, 33 ... wiring / piping material, 34, 51, Va ... penetrating part, 40 ... lid.

Claims (5)

A fireproofing material filled between a penetration part formed in a fire prevention compartment of a building and a wiring / piping material inserted into the penetration part,
A fireproof treatment formed by housing a block body having cushioning properties and nonflammability in a bag-like exterior member made of a soft synthetic resin material excluding rubber, which has fireproof performance and is thermally expanded. Wood.   The fireproof processing material according to claim 1, wherein the block body is wrapped by an exterior member so as not to drop out of the exterior member.   The fireproof material according to claim 2, wherein an air hole is formed in the exterior member.   The fireproof processing material according to any one of claims 1 to 3, wherein a plurality of scales are provided on an outer surface of the exterior member.   The refractory treatment material according to any one of claims 1 to 4, further comprising a lid body that is externally mounted on the cut end portion so as to cover the block body exposed from the cut end portion of the refractory treatment material.

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