JP5846945B2 - Fire prevention structure and construction method of fire prevention structure - Google Patents

Description

  The present invention relates to a fire prevention structure and the like used when a metal pipe provided with a flammable heat insulating layer penetrates a fire prevention compartment of a building such as a fire prevention wall or a floor.

  Conventionally, metal pipes with a flammable foam insulation layer, plastic pipes, flammable long objects such as electric wires / cables, etc. that penetrate through fire prevention compartments such as walls and floors of buildings, spread fire in the event of a fire. In order to prevent this, it is necessary to apply the necessary fire prevention treatment. Such a fireproofing process for a long object penetrating through the opening formed in the fireproofing section is generally called a section penetrating part fireproofing process. The fire resistance of the compartment penetrating portion (hereinafter simply referred to as “fire prevention structure”) is evaluated by a public performance evaluation organization.

  As such a fire prevention structure, there is a method of filling a thermally expansible material around a flammable long object that penetrates. When a long object is melted or burned out during a fire, the heat-expandable material expands due to heat, and it is possible to prevent the spread of fire by closing the generated space (Patent Document 1).

  The fire prevention structure having such a structure is suitable for resin pipes (hard vinyl chloride, high density polyethylene, polypropylene, etc.) and electric cables that have a relatively slow fire spread rate among combustible long articles. For flammable long objects as described above, less heat-expandable material is used, and the length of fire prevention treatment (the length of fire through the compartment penetration part in the longitudinal direction of the flammable long objects) Therefore, it is possible to simplify construction and suppress material costs.

  On the other hand, as a fire prevention structure suitable particularly when a long object such as a pipe or a cable is passed through an opening of a single wall structure, for example, the length of the wall structure in the penetration part formed in the wall structure There is a method of arranging a penetration sleeve made of a heat-resistant material longer than the thickness of the material. At this time, the center in the length direction of the penetrating sleeve is installed in a side-by-side arrangement that is closer to one side than the center in the thickness direction of the wall structure. A member that arranges a thermally expandable filler between the outer surface of the penetrating elongated body and the penetrating sleeve, and restricts the thermally expandable filler from separating from the predetermined expansion region to the other side of the wall structure during the thermal expansion. (Patent Document 2).

  According to this structure, the space in the through sleeve is filled with the heat-expandable filler during thermal expansion and expands in the longitudinal direction of the through-sleeve. Therefore, from the initial treatment length (filling length) of the heat-expandable filler In the long range, the fire spread prevention performance can be secured.

Japanese Patent No. 3993919 JP2011-74969A

  However, in contrast to the method of Patent Document 1, a metal tube provided with a combustible foam heat insulating layer such as a highly foamed polyethylene-coated copper tube used for an air-conditioning refrigerant tube may be used. The flammable foam heat insulating layer is formed by foaming a resin, includes an air layer, and has a low density, and therefore has a small heat capacity. Therefore, the flammable foam heat insulating layer has a higher rate of fire spread than a resin tube using non-foamed resin or an outer sheath of an electric cable.

  Moreover, even if the combustible foam heat insulating layer burns, the metal pipe as the core material remains as it is during the fire combustion. For this reason, the heat of the fire is easily conducted from the fire side to the anti-fire side (the opposite side of the wall where the fire is occurring or the upper side of the floor) by the metal pipe. Therefore, even if an appropriate fire prevention structure is built in the penetration part of the metal pipe on the fire wall or floor, the combustible foam insulation layer on the anti-fire side melts due to the heat conduction of the metal pipe and the inner wall of the opening, and There is a risk of ignition due to generation of flammable gas from the flammable foam insulation layer.

  This trend is especially true for fire-resistant structures in hollow walls with gypsum boards on either side of a wooden or steel frame, or on single-walled structures with a gypsum board on one side of a wooden or steel frame. Appears prominently. Compared with the case of concrete or a lightweight cellular concrete wall, such a wall can easily have a flame at the time of a fire in a hollow part such as a frame of a hollow structure or a single side part of a single wall structure. For this reason, it is because the metal pipe in a fire prevention structure will be directly exposed to a flame, and the thermal influence on the antifire side, such as a fire wall, will become remarkably large.

  On the other hand, the method described in Patent Document 2 can solve the above problem, but does not mention a method of disposing a thermally expandable filler inside the through sleeve. In particular, although an example in which a putty-like thermally expandable filler is filled is described, it is difficult to manage the filling amount of the thermally expandable filler. Therefore, there is a risk of cost increase due to excessive filling of the thermally expandable filler, performance deterioration due to insufficient filling material, and the like.

  On the other hand, there is a method in which a receiving material made of a refractory material is installed in the opening with respect to the fire prevention structure in which the opening is filled with material. The filling amount of the thermally expandable filler can be regulated by the receiving member.

  However, when such a receiving member is used, when the thermally expandable filler is thermally expanded, the receiving plate becomes an obstacle and it is difficult to thermally expand in the direction of the receiving member. That is, it is difficult to ensure the fire spread prevention performance by expanding into a longer region with respect to the filling length of the thermally expandable filler. Therefore, in order to prevent the fire spread of metal pipes with a flammable foam insulation layer with a fast fire spread rate, it is necessary to increase the filling amount (filling length) of the heat-expandable filler, resulting in poor workability and material costs. It will be accompanied by up.

  This invention is made | formed in view of such a problem, is excellent in workability | operativity, can reduce material cost, and especially the metal pipe provided with the combustible foam heat insulation layer penetrates the opening part of a building. It aims at providing the fire prevention structure used at the time.

In order to achieve the above-described object, the first invention is provided with an opening provided in a partition part, a long metal body provided around the opening, and an interior of the opening. And a thermoplastic member disposed in the opening and disposed in contact with the thermoplastic member in the opening, and a filling amount in the opening is regulated by contacting the thermoplastic member. 1 and a heat-expandable refractory material, and a receiving member is further provided inside the opening, and the receiving member has a predetermined depth that is shallower than the thickness of the partition portion inside the opening. It is arranged at a depth position and is in contact with the thermoplastic member on the side opposite to the side on which the first thermally expandable refractory material is arranged, and the thermoplastic member is brought into the opening by the receiving member. held, during a fire, the thermoplastic member is burning or By flowing by fusion plasticized, the first thermal expansion fireproof material is a fire protection structure, characterized in that the inflatable in a direction in which the thermoplastic member has been arranged.

According to a second aspect of the present invention, there is provided an opening provided in the partition, a metal long body provided so as to penetrate the opening, a thermoplastic member disposed in the opening, A first heat-expandable refractory material disposed inside the opening, disposed so as to be in contact with the thermoplastic member, and the amount of filling into the opening being regulated by contacting the thermoplastic member And the thermoplastic member corresponds to the outer shape of the elongated body and the flammable heat insulating layer and the inner shape of the opening within the opening. Ri deformable resilient member der and, in case of fire, that the thermoplastic member flows out to burn or melt plasticized, the first thermal expansion fireproof material, the thermoplastic member is disposed Fire protection characterized by being able to expand in any direction It is a concrete body.

  The thermoplastic member is a long member having flexibility, and along the inner surface of the opening, the longitudinal direction of the thermoplastic member is the circumferential direction of the opening in the opening. It is desirable to be bent and arranged.

  A hollow portion may be formed inside the thermoplastic member in a cross section in a direction perpendicular to the longitudinal direction of the thermoplastic member.

  A cylindrical member is provided in the partitioning portion on the side where the first thermally expansible refractory material is disposed, so as to cover the elongated body, A second thermally expandable refractory material may be provided around the elongated body, and an incombustible member may be provided on the outer periphery of the second thermally expandable refractory material. Here, the long body refers to, for example, a metal tube such as a heat exchanger pipe having a flammable heat insulating layer coated with foam molding resin, or a long body such as a resin-coated electric wire or cable. .

  According to the first aspect of the invention, since the filling amount of the first thermothermal expansion refractory material disposed in the opening is regulated by the thermoplastic member, the first thermal expansion refractory material is excessive in the opening. There is no filling. Therefore, material cost can be reduced.

In addition, since the member that regulates the filling amount of the first thermally expandable refractory material is a thermoplastic member, it easily burns out or disappears due to heat at the time of fire. At this time, by arranging the receiving member for holding the thermoplastic member inside the opening, the thermoplastic member can be more reliably held in the opening. Furthermore, since the receiving member is disposed at a predetermined depth position of the opening, the amount of the first thermally expandable refractory material can be regulated and the amount of the thermoplastic member used can be regulated. Members flow or disappear early in the event of a fire. Therefore, the first thermally expandable refractory material can easily expand in the direction in which the thermoplastic member was present. Therefore, it is possible to prevent the spread of fire in a region longer than the filling length of the first thermally expandable refractory material.

  In general, for such a fireproof structure, it is common to use a refractory material or a flame retardant member, and the use of a flammable member or a heat-sensitive thermoplastic member has been avoided as much as possible. . The present invention has been made with a completely opposite idea to such common sense.

In addition, according to the second invention, the thermoplastic member is an elastic member, deformable der because collapses easily cross section, the elongate body exterior surface of the opening (with a flammable insulation layer) The thermoplastic member can be arranged by being easily deformed into the shape of the gap between the inner surface. Therefore, it is excellent in workability.

  In particular, if the thermoplastic member is a long member and can be bent easily, the length can be adjusted according to the size of the opening or the like, and can be easily inserted.

  Further, by forming the hollow portion inside the cross section of the thermoplastic member, the amount of deformation can be increased, and the amount of combustion or outflow of the thermoplastic member during a fire can be suppressed.

  In addition, a tubular member is disposed on one side of the opening, and the second thermally expandable refractory material is disposed inside the tubular member, thereby ensuring the fire spread prevention performance more reliably for the partition portion. can do.

The third invention includes the steps of passing a metallic elongate body into the opening formed in the partition portion, Oite inside the opening, receiving a predetermined depth position shallower than a thickness of the partition portion A step of arranging a member, a step of inserting a thermoplastic member from one opening side of the opening to the position of the receiving member, and a heat from one opening side of the opening to the position of the thermoplastic member. And a step of inserting a heat-expandable refractory material that expands at a step.

According to the third aspect of the invention, it is possible to easily obtain a fire prevention structure that is excellent in workability and can reduce material costs.

  According to the present invention, there is provided a fire prevention structure that is excellent in workability and can reduce material costs, and particularly used when a metal tube having a combustible foam heat insulating layer penetrates an opening of a building. can do.

The perspective view which shows the fire prevention structure 1. FIG. AA sectional view taken on the line AA of FIG. The figure which shows the process of constructing the fire prevention structure. It is a figure which shows the process of constructing the fire prevention structure 1, (a) is a perspective view, (b) is a figure which shows the receiving member 17. FIG. The front view of the state in which the receiving member 17 is arrange | positioned. It is a figure which shows the process of constructing the fire prevention structure 1, (a) is a perspective view, (b) is a figure which shows the thermoplastic member 19. FIG. The front view of the state by which the thermoplastic member 19 is arrange | positioned. It is a figure which shows the process of constructing the fire prevention structure 1, and is a figure corresponding to FIG. The perspective view which shows the process of constructing the fire prevention structure 1. FIG. The figure which shows the function of the fire prevention structure 1. FIG. The figure which shows the other fire prevention structure 30. FIG. (A) is a front view of a state in which the receiving member 33 is disposed, and (b) is a perspective view of the receiving member 33. The figure which shows the thermoplastic member 35. FIG.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a perspective view showing a fire prevention structure 1 according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  The fire prevention structure 1 is mainly composed of a fire wall 3 which is a partition part for partitioning a room and the like, an opening 5 formed in the fire wall 3, a plurality of long bodies 7 installed in the opening 5, It is comprised from the thermally expansible refractory material 11b provided so that the clearance gap between the inner surface of the opening part 5 and the elongate body 7 may be block | closed, the thermoplastic member 19, etc. FIG. In the following example, although the fire barrier 3 is shown as the fire prevention structure 1, it may be provided on a floor (ceiling) or the like partitioned in the vertical direction.

  The fire wall 3 is a hollow wall made of, for example, a wooden frame and two sheets of reinforced gypsum board attached to each other, although the illustration is simplified. The shape of the opening 5 is not limited to the illustrated example.

  A plurality of elongated bodies 7 are inserted into the opening 5. The long body 7 is, for example, a metal tube, and a heat insulating layer is formed on the outer periphery. The long body 7 is, for example, a tube for air conditioning refrigerant. The heat insulation layer is a combustible foam heat insulation layer formed of, for example, highly foamed polyethylene or the like. In addition, although the figure shows the example by which the two long bodies 7 are arrange | positioned, many more long bodies 7 may be arrange | positioned, other than a long body of a different size, and a long body with a heat insulation layer Attached pipes or the like may be appropriately disposed.

  A receiving member 17 is inserted from one side of the opening 5 (left side in FIG. 2, hereinafter referred to as “working side”) as necessary. The receiving member 17 is supported by one outer surface of the fire wall 3 and is disposed at a predetermined position in the depth direction of the opening 5. The receiving member 17 is a member formed by, for example, bending a wire or the like, and is for holding the thermoplastic member 19. Details of the receiving member 17 will be described later.

  Inside the opening 5, a thermoplastic member 19 is provided on the working side of the receiving member 17 so as to be in contact with the receiving member 17. The thermoplastic member 19 is a member that can be easily burned or melted by heat such as a fire to disappear or flow out. As the thermoplastic member 19, for example, a thermoplastic resin foam or a rubber-like body can be used. Here, as the thermoplastic resin foam, foamed polyethylene or foamed polypropylene can be used, and as the rubber-like body, a thermoplastic elastomer that exhibits thermoplasticity when heated can be used. As the thermoplastic elastomer, various materials such as a styrene-based elastomer, an olefin-based elastomer, and a polyester-based elastomer are conceivable. These elastomers may be used as they are or may be used after being foamed. The thermoplastic member 19 is disposed in the gap between the inner surface of the opening 5 and the outer peripheral surface of the heat insulating layer 9 (long body 7). Details of the thermoplastic member 19 will be described later.

  A thermally expandable refractory material 11 b is provided on the working side of the thermoplastic member 19 inside the opening 5. The heat-expandable refractory material 11b is a member that expands in volume by heat such as fire. In order to fill the gap between the long body 7 and the inner surface of the opening 5 so as not to make a gap as much as possible, it is desirable to use a deformable putty-like material as the thermally expandable refractory material 11b. .

  A heat-expandable refractory material is made by adding expanded graphite (expandable graphite) to a mixture of an inorganic material such as calcium carbonate and magnesium hydroxide added to a base polymer, which is a material normally used for putty materials, and an oil as a plasticizer. The expansion ratio and the expansion temperature can be changed by controlling the mixing ratio of the two. Further, the heat-expandable refractory material needs to be flexible enough to be packed in the opening.

  The expansion temperature of the heat-expandable refractory material 11b is, for example, a specific expansion temperature that is higher than the melt plasticization temperature of the thermoplastic member 19 and lower than the ignition temperature. Desirably, the expansion temperature of the expandable refractory material starts thermal expansion at a temperature of 150 ° C. or higher and 240 ° C. or lower, and is matched with the expansion temperature of the thermally expandable refractory material. The specific expansion ratio can be appropriately designed as necessary. However, it is desirable to use a material that expands volume by 2 times or more, and it is more desirable to use a material that expands volume by 5 times or more.

  A cylindrical member 15 is installed on the outer surface of the fire wall 3 on the work side as necessary. The cylindrical member 15 is a cylindrical member having an inner diameter that is slightly larger than the opening diameter of the opening 5. In addition, the cylindrical member 15 is good also as a cylinder shape by dividing | segmenting into multiple in the circumferential direction (for example, dividing into 2), and arrange | positioning so that it may mutually oppose. The cylindrical member 15 is made of metal, for example.

  Inside the cylindrical member 15, a thermally expandable refractory material 11 a is disposed on the outer peripheral surface of the long body 7 (heat insulating layer 9). The thermally expandable refractory material 11a is substantially the same member as the thermally expandable refractory material 11b. The thermally expandable refractory materials 11a and 11b may be integrated.

  An incombustible material 13 is disposed inside the cylindrical member 15 and on the outer peripheral portion of the thermally expandable refractory material 11a. The incombustible material 13 is preferably an inorganic fiber such as ceramic wool, rock wool, glass wool, or siliceous fiber. Furthermore, it is desirable in terms of improving workability to wrap around these inorganic fibers with a plastic film, a combustible nonwoven fabric, a combustible woven fabric, or the like.

  Note that the cylindrical member 15, the thermally expandable refractory material 11a, and the incombustible material 13 are not necessarily required. If the fire expandability can be secured by the thermally expandable refractory material 11b, the tubular member 15 or the like is not provided. Also good. Further, the receiving member 17 may not be provided as long as the thermoplastic member 19 can be held at a predetermined position of the opening 5.

  Next, the construction method of the fire prevention structure 1 will be described. First, as shown in FIG. 3, a long body 7 provided with a heat insulating layer 9 is inserted into an opening 5 formed in the fire wall 3 in advance. The size and shape of the opening 5 are appropriately set according to the size, the number, and the like of the long body 7 to be inserted.

  Next, as shown to Fig.4 (a), the receiving member 17 is installed in the opening part 5 from the work side (arrow B direction in the figure). FIG. 4B shows the receiving member 17. As described above, the receiving member 17 is formed by bending a metal wire such as a wire. A cut portion 21 is provided in a part of the receiving member 17. By opening the cut portion 21, the opening portion 5 through which the long body 7 is inserted can be easily installed.

  The receiving member 17 has an arm portion 18 that at least partially contacts the outer surface (the outer surface on the working side) of the fire wall 3 and prevents the receiving member 17 itself from falling off in the direction opposite to the working side of the opening 5. . In addition, the receiving member 17 is disposed in the gap between the long body 7 (heat insulating layer 9) and the inner surface of the opening 5 while avoiding interference with the long body 7 inside the opening 5. Have That is, the receiving member 17 is bent substantially perpendicularly from the arm portion 18 that contacts the outer surface of the fire wall 3 and the arm portion 18, and is bent substantially perpendicularly in a direction substantially parallel to the arm portion 18. It is formed.

  FIG. 5 is a front view of the receiving member 17 installed in the opening 5. As shown in FIG. 5, the receiving member 17 is disposed inside the opening 5 so that the receiving portion 16 is located between the elongated body 7 (heat insulating layer 9) and the inner surface of the opening 5. The Note that the receiving portion 16 is appropriately bent so as to substantially follow the inner surface shape of the opening 5. In this state, since the maximum width between the pair of arm portions 18 is set wider than the opening width of the opening 5, the receiving member 17 does not fall into the opening 5. Further, the receiving part 16 can be arranged at a predetermined depth position of the opening part 5.

  Next, as shown to Fig.6 (a), the thermoplastic member 19 is inserted from the operation | work side of the opening part 5 (arrow C direction in the figure). As shown in FIG. 6B, for example, the thermoplastic member 19 is a long member having a circular cross section having flexibility. The thermoplastic member 19 can be easily deformed and bent. Therefore, the longitudinal direction can be bent, for example, in a circle along the shape of the opening 5 so as to match the shape of the opening 5.

  The thermoplastic member 19 is inserted into the opening 5 from the working side in a state of being bent along the inner surface of the opening 5 so that the longitudinal direction thereof is the circumferential direction of the opening 5. It is pushed in until it contacts 16. That is, the thermoplastic member 19 is held in the opening 5 by the receiving member 17, and the position in the depth direction inside the opening 5 is determined.

  FIG. 7 is a front view of a state in which the thermoplastic member 19 is installed in the opening 5. As shown in FIG. 7, the thermoplastic member 19 is inserted inside the opening 5 and between the elongated body 7 (heat insulating layer 9) and the inner surface of the opening 5. At this time, there is a portion where the gap between the long body 7 (the heat insulating layer 9) and the inner surface of the opening 5 is narrow, but since the cross section of the thermoplastic member 19 is easily crushed, it can be pushed into the narrow gap. .

  In addition, although the figure shows the state where only the thermoplastic member 19 is crushed, the heat insulating layer 9 may be crushed similarly. Further, a gap may be formed between the thermoplastic member 19 and the inner surface of the opening 5 or the elongated body 7 (heat insulating layer 9). Moreover, the thermoplastic member 19 does not necessarily need to be a long thing, and a block-shaped thing may be used for it. In this case, a plurality of thermoplastic members 19 may be used.

  Next, as shown in FIG. 8, the thermally expandable refractory material 11b is inserted from the working side of the opening 5 (in the direction of arrow D in the figure). The thermally expandable refractory material 11 b is inserted inside the opening 5 and between the elongated body 7 (heat insulating layer 9) and the inner surface of the opening 5. Further, the heat-expandable refractory material 11 b is inserted to a depth corresponding to the thermoplastic member 19 and filled to the outer surface (working side) position of the fire wall 3. As described above, since the position of the thermoplastic member 19 inside the opening 5 is determined by the receiving member 17, the filling depth of the thermally expandable refractory material 11 b is also determined by the thermoplastic member 19. Therefore, the filling amount of the thermally expandable refractory material 11b in the opening 5 can be regulated.

  In addition, since the thermoplastic member 19 is disposed so as to be wound around the outer periphery of the long body 7 (heat insulating layer 9), the gap between the inner surface of the opening 5 and the outer surface of the long body 7 (heat insulating layer 9) is ensured. Retained. Therefore, the insertion work of the heat-expandable refractory material 11b is easy.

  Next, the heat-expandable refractory material 11 a is further wound around a predetermined range of the long body 7 (heat insulating layer 9) protruding to the working side of the opening 5. The length for winding the heat-expandable refractory material 11a is preferably, for example, 50 mm or more.

  In FIG. 9, the process figure which constructs the fire prevention structure 1 is shown. An incombustible material 13 is further wound around the outer periphery of the thermally expandable refractory material 11a (in the direction of arrow E in the figure). Further, an inverted split cylindrical member 15 is covered from the outer peripheral side of the non-combustible material 13 (in the direction of arrow F in the figure). The tubular member 15 is fixed to the fire wall 3. As described above, the fire prevention structure 1 can be constructed.

  Next, the function of the fire prevention structure 1 will be described. FIG. 10 is a conceptual diagram showing the function of the fire prevention structure 1 at the time of a fire. In the following, a case where the work side of the fire wall 3 has a fire will be described.

  When the work side becomes a fire, the heat insulating layer 9 on the outer periphery of the long body 7 arranged on the work side is immediately burned and burned out. Therefore, the heat insulation layer 9 located inside the cylindrical member 15 is also burned out. On the other hand, the thermally expandable refractory material 11a expands due to the heat of the fire. Since the thermally expandable refractory material 11a is arranged in the direction opposite to the work side, the thermally expandable refractory material 11a is in the center direction of the fire prevention structure 1 (in the direction of arrow G in the figure) and the longitudinal direction of the long body 7. Thus, it mainly expands in the work side direction (the direction of arrow H in the figure).

  The thermally expandable refractory material 11b also expands due to fire heat, heat transmitted through the long body 7, or the like. At this time, since the thermoplastic member 19 is disposed on the non-work side, the thermally expandable refractory material 11b first expands mainly in the center direction (in the direction of arrow I in the figure). Therefore, it is possible to efficiently fill a gap generated by burning out the heat insulating layer 9.

  FIG.10 (b) is a conceptual diagram which shows the state which expansion | swelling of the thermally expansible refractory materials 11a and 11b further advanced by the fire. When the fire further progresses, the thermally expandable refractory material 11a expands so as to cover the long body 7 exposed by the heat insulation layer 9 being burned out, and further expands in the longitudinal direction of the long body 7, The outer periphery of the long body 7 is covered.

  On the other hand, the thermoplastic member 19 is softened by heat and flows out, or is burned out by combustion. Therefore, in addition to the expansion in the center direction, the thermally expandable refractory material 11b expands in the longitudinal direction of the long body 7 and in the direction opposite to the working side (in the direction of arrow J in the figure), and the long body 7 (heat insulation) Cover layer 9). The receiving member 17 is not burned away by heat, but is linear, and therefore does not hinder the expansion of the thermally expandable refractory material 11b.

  As described above, the expansion between the heat-expandable refractory materials 11a and 11b in the center direction can completely close the gap between the long body 7 and the inner surface of the opening 5 caused by the heat insulation layer 9 being burned out. Moreover, the outer periphery of the elongate body 7 (heat insulation layer 9) is coat | covered with the heat-expandable refractory material only the predetermined length in the longitudinal direction by expansion | swelling of the heat-expandable refractory material 11a in the longitudinal direction. Therefore, it can prevent that the elongate body 7 in the meantime contacts with the flame of a fire. Moreover, even if it is a hollow wall, a fire flame does not enter the fire wall 3.

  Note that the same effect can be obtained when a fire occurs on the non-work side. In this case, first, the heat insulating layer 9 and the thermoplastic member 19 located on the non-working side are immediately burned away. Therefore, the heat-expandable refractory material 11b immediately expands toward the center direction and the non-work side due to heat. Similarly, the heat-expandable refractory material 11a also starts to expand in the center direction and the longitudinal direction (working side direction) due to heat. As described above, the heat-expandable refractory materials 11 a and 11 b close the gap of the opening 5 and cover the long body 7 (heat insulating layer 9) near the opening 5.

  In addition, if a heat insulating material or a non-combustible material is temporarily disposed at the position of the thermoplastic member 19, it is delayed that heat is transmitted to the thermally expandable refractory material 11b by the heat insulating material or the like. For this reason, the expansion timing of the heat-expandable refractory material 11b is delayed, and for example, the heat insulating layer 9 on the work side may be burned. However, in the present invention, since the thermoplastic member 19 is quickly lost, the expansion of the thermally expandable refractory material 11b is accelerated. Therefore, a higher fire spread prevention effect can be exhibited.

  As described above, according to the fire prevention structure 1 according to the present invention, the thermal expansion refractory materials 11a and 11b can reliably block the vicinity of the opening 5 and prevent the spread of fire. Moreover, since the thermoplastic member 19 is arrange | positioned inside the opening part 5 at the time of construction, the thermoplastic member 19 becomes a stopper of the heat-expandable refractory material 11b, and the heat-expandable refractory material 11b is more in the opening part 5 than necessary. And the filling amount is not insufficient.

  Further, the thermoplastic member 19 flows out or burns out in the event of a fire. For this reason, the heat-expandable refractory material can be expanded in the longitudinal direction of the long body 7. Therefore, the fire spread prevention structure can be secured for a longer range than the filling length of the thermally expandable refractory material.

  Moreover, since the thermoplastic member 19 is hold | maintained by the receiving member 17, it is excellent also in workability | operativity. In addition, since the receiving member 17 is a wire, it hardly interferes with the expansion of the thermally expandable refractory material 11b. Moreover, since the thermoplastic member 19 is easily crushed in cross section, it is excellent in installation workability. Furthermore, since the thermoplastic member 19 is a long material, it can be easily installed on the entire inner surface of the opening 5.

  When the work side is a fire, the thermoplastic member 19 temporarily restricts the expansion of the heat-expandable refractory material 11b, and the heat-expandable refractory material 11b can be surely expanded in the radial direction. Note that due to heat conduction from the long body 7, the thermoplastic member 19 melts relatively early and does not maintain its shape, and lowers the support strength of the thermally expandable refractory material 11b. Therefore, the subsequent expansion of the thermally expandable refractory material 11b in the longitudinal direction is not hindered.

  Further, even when the non-working side is a fire, the thermoplastic member 19 immediately flows out or burns out, so that the thermally expandable refractory material 11b immediately starts to expand, and the long body 7 and the inner surface of the opening 5 It is possible to block air flowing into the gap by forming a heat insulating layer therebetween and expanding the opening in the longitudinal direction.

  Thus, even if a fire occurs on either side, the thermally expandable refractory material 11b can be expanded in the longitudinal direction, so that the effect of the filled thermally expandable refractory material 11b is maximized. It can be demonstrated. That is, the usage amount of the heat-expandable refractory material can be reduced as compared with the prior art. Therefore, the material cost can be reduced, and the depth of filling the thermally expandable refractory material 11b can be reduced, so that the workability is greatly improved.

  In addition, when the performance of the fireproof structure 1 was actually evaluated, the fireproof performance was confirmed. The evaluation was made for a structure in which a flammable long object such as a metal pipe and an attached pipe having a flammable foam heat insulating layer was passed through an opening of a round hole installed in a hollow wall having a total wall thickness of 80 mm. . The filling depth of the heat-expandable filler was set to 35 mm so that the workability on site was good. The structure constructed in the same manner as the fireproof structure 1 shown in FIGS. 1 and 2 was heated in accordance with a standard heating curve defined in ISO834. The work side was the fire side, and the thermoplastic member was placed on the anti-fire side.

  As a result, the thermoplastic member is melted by heat from about 30 minutes after the heating, and immediately after that, the filler starts to expand remarkably on the anti-fire side and closes the space between the inner wall of the opening and the combustible long object. Blocked. For this reason, it was confirmed that the fire prevention (fire spread prevention) performance of 60 minutes or more was exhibited.

  On the other hand, when a non-combustible material was used instead of the thermoplastic member, the combustion of the combustible foam heat insulating layer was transmitted to the anti-fire side within 60 minutes. That is, as a member for regulating the filling amount of the heat-expandable refractory material, the use of a thermoplastic member exhibited higher fire spread prevention performance.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, you may use the fire prevention structure 30 shown in FIG. In the following description, members having the same functions as those of the fire prevention structure 1 are denoted by the same reference numerals as those in FIGS. 1 and 2, and redundant descriptions are omitted. The fire prevention structure 30 has the same configuration as that of the fire prevention structure 1, but differs in that the cylindrical member 15 and the internal configuration thereof are not used.

  The thermally expandable refractory material 31 can use the same member as the thermally expandable refractory material 11b, but is not putty-like, for example, a putty or paste-like block or sheet-like packaged in polyethylene or the like It may be. In the fire prevention structure 1, the tubular member 15 is used. However, if the sufficient heat-expandable refractory material 31 can be filled in the opening 5, the fire prevention structure 30 can be provided only in the opening 5. It may be configured. Even in this case, the thermoplastic member 19 is provided in order to reliably grasp the necessary amount of the heat-expandable refractory material 31. The fire prevention structure 30 can also obtain the same effects as the fire prevention structure 1.

  Further, as a receiving member for holding the thermoplastic member 19, a receiving member 33 shown in FIG. 12 may be used. FIG. 12A is a front view showing a state in which the receiving member 33 is installed in the opening 5, and FIG. 12B is a perspective view showing the receiving member 33.

  The receiving member 33 is configured by bending, for example, a metal plate-like member. Similarly to the receiving member 17, the receiving member 33 has an arm portion 35 that contacts the outer surface of the fire wall 3, and a receiving portion 37 that is positioned inside the opening 5 and holds the thermoplastic member 19.

  As shown in FIG. 12A, the receiving member 33 is installed at a plurality of locations on the edge of the opening 5. The receiving member 33 may be fixed to the outer surface of the fire wall 3 with screws or the like. Even when configured as the receiving member 33, the same effect as the receiving member 17 can be obtained. Further, by using a plurality of receiving members 33, the thermoplastic member can be reliably held inside the opening 5 and can be easily installed on the existing long body 7. . When the long body is inserted later, the receiving member 33 does not cover the edge of the opening 5 by dividing it into a plurality of places, but covers the entire periphery of the edge of the opening with a single member. A covering structure can also be used.

  Also, a thermoplastic member 39 as shown in FIG. 13 can be used. 13A is an overall view, and FIG. 13B is a cross-sectional view taken along the line KK of FIG. 13A. The thermoplastic member 39 is substantially the same as the thermoplastic member 19, but differs in that a hollow portion 41 is formed inside.

  Since the thermoplastic member 39 has the hollow part 41 inside, the amount of crushing in the cross-sectional direction is large. Therefore, in a portion where the gap between the inner surface of the opening 5 and the elongated body 7 (heat insulating layer 9) is large, the gap is efficiently closed by a large outer diameter, and the cross section is largely crushed in a narrow gap. And can be inserted easily.

  Further, the thermoplastic member 39 has a small volume even when the outer diameter is increased. For this reason, it immediately flows out or burns away in the event of a fire. For this reason, a thermally expansible refractory material can be expanded more rapidly.

DESCRIPTION OF SYMBOLS 1, 30 ......... Fire prevention structure 3 ......... Fire barrier 5 ......... Opening part 7 ......... Long body 9 ......... Heat insulation layer 11a, 11b, 31 ......... The thermal expansion fireproof material 13 ... ... non-combustible material 15 ... ... cylindrical members 16 and 37 ... ... receiving parts 17 and 33 ... ... receiving members 18 and 35 ... ... arm parts 19 and 39 ... ... thermoplastic member 21 ... ... cut part 41 ......... hollow part

Claims (6)

An opening provided in the partition,
A metal elongated body provided so as to penetrate the opening,
A thermoplastic member disposed inside the opening, and disposed inside the opening so as to be in contact with the thermoplastic member, and a filling amount in the opening is in the thermoplastic member. A first thermally expansive refractory material regulated by contact;
Comprising
A receiving member is further provided inside the opening,
The receiving member is arranged at a predetermined depth position shallower than the thickness of the partition portion inside the opening, and the heat on the side opposite to the side on which the first thermally expandable refractory material is arranged. In contact with the plastic member, the thermoplastic member is held inside the opening by the receiving member;
In the event of a fire, the thermoplastic member is combusted or melt-plasticized and flows out, so that the first thermally expandable refractory material can expand in the direction in which the thermoplastic member is disposed. Fire prevention structure. An opening provided in the partition,
A metal elongated body provided so as to penetrate the opening,
A thermoplastic member disposed inside the opening, and disposed inside the opening so as to be in contact with the thermoplastic member, and a filling amount in the opening is in the thermoplastic member. A first thermally expansive refractory material regulated by contact;
Comprising
The thermoplastic member, in the interior of the opening, Ri outer shape and deformable resilient member Der corresponding to the inner surface shape of the opening of the long body section of the thermoplastic member is crushed,
In the event of a fire, the thermoplastic member is combusted or melt-plasticized and flows out, so that the first thermally expandable refractory material can expand in the direction in which the thermoplastic member is disposed. Fire prevention structure. The thermoplastic member is a long member having flexibility, and along the inner surface of the opening, the longitudinal direction of the thermoplastic member is the circumferential direction of the opening in the opening. The fireproof structure according to claim 2 , wherein the fireproof structure is arranged bent. The fireproof structure according to claim 3 , wherein a hollow portion is formed inside the thermoplastic member in a cross section perpendicular to the longitudinal direction of the thermoplastic member. A cylindrical member is provided on the partition portion on the side where the first thermally expansible refractory material is disposed, so as to cover the elongated body,
Inside the cylindrical member, a second thermally expandable refractory material is provided around the elongated body, and a nonflammable member is further provided on the outer periphery of the second thermally expandable refractory material. The fireproof structure according to any one of claims 1 to 4 . Passing the elongated body through the opening formed in the partition,
Oite inside of the opening, placing a member received in the shallow predetermined depth position than the thickness of said partition portion,
Inserting a thermoplastic member from one opening side of the opening to the position of the receiving member;
Inserting a thermally expandable refractory material that expands with heat from one opening side of the opening to the position of the thermoplastic member;
The construction method of the fire prevention structure characterized by comprising.

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