JP2020037784A - Thermally expandable member and fireproof structure - Google Patents

Abstract

To provide a thermally expandable member and a fireproof structure facilitating formation of an expansion body at a predetermined position.SOLUTION: A thermally expandable member 11 is used for suppressing the spread of a fire through a through-hole of a partition part through which a pipe body is inserted. The thermally expandable member 11 has a thermal expansion material 12 thermally expanded by heat at the time of spreading fire, and a bag 13 storing the thermal expansion material 12. The bag 13 is constituted of a laminated film F having a synthetic resin layer L1 and an incombustible material layer L2.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a heat-expandable member and a fire-resistant structure.

  Conventionally, a heat-expandable member has been used in order to suppress the spread of fire through a through hole of a section into which a tube is inserted. Patent Literature 1 discloses a thermally expandable member that includes a thermal expansion material and a bag that stores the thermal expansion material. The bag of the heat-expandable member is made of a resin film that melts or burns when the fire spreads.

JP-A-2017-109069

  In a thermally expandable member including a thermal expansion material and a bag that stores the thermal expansion material, a part of an expansion body formed by thermal expansion of the thermal expansion material at the time of fire spread is a predetermined expansion member that closes a through hole of a partition. May be displaced from the position. In consideration of such displacement of the expansion body, for example, it is necessary to increase the amount of the thermal expansion material used. Increasing the amount of the thermal expansion material may increase the cost of the thermal expansion material or reduce the efficiency of storage and transportation of the thermal expansion member. It is important to make it happen.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heat-expandable member and a fire-resistant structure that facilitate forming an expandable body at a predetermined position.

  A heat-expandable member that solves the above-mentioned problem is a heat-expandable member that is used for suppressing the spread of fire through a through-hole of a partition into which a tube is inserted, and is a heat-expandable material that thermally expands due to heat during the spread of fire. And a bag accommodating the thermal expansion material, wherein the bag is formed of a laminated film having a synthetic resin layer and a non-combustible material layer.

  According to this configuration, the collapse of the laminated film due to heat at the time of spreading the fire can be delayed by the non-combustible material layer. Therefore, the direction in which the thermal expansion material thermally expands or the movement of the expansion body formed from the thermal expansion material can be restricted by the laminated film (the noncombustible material layer).

  In the thermally expandable member, the shape of the bag is a rectangular shape having a pair of long sides and a pair of short sides, and at least one long side of the pair of long sides includes the laminated film. It is composed of a bent portion that is bent.

  According to this configuration, the direction in which the thermal expansion material thermally expands or the movement of the expansion body formed from the thermal expansion material is restricted by the laminated film (the noncombustible material layer) connected by the bent portion. Or you can.

In the thermally expandable member, the non-combustible material layer preferably includes a metal layer.
For example, the non-combustible material layer can be configured as described above.
A fireproof structure that solves the above-mentioned problem is a fireproof structure including a partition having a through hole, a pipe inserted into the through hole, and a thermally expandable member that suppresses fire spread through the through hole, The heat-expandable member has a heat-expanding material that thermally expands due to heat generated during the spread of fire, and a bag that contains the heat-expanding material. It is configured.

  In the fire-resistant structure, the partition is disposed so as to partition upper and lower floors, and the shape of the bag is a rectangular shape having a pair of long sides and a pair of short sides in plan view, and It is preferable that at least one of the long sides is constituted by a bent portion formed by bending the laminated film, and the bent portion is disposed downward.

  According to this configuration, the downward thermal expansion of the thermal expansion material and the downward movement of the expansion body formed from the thermal expansion material can be restricted.

  According to the present invention, it is easy to form the expansion body at a predetermined position.

FIG. 3 is a plan view showing the heat-expandable member of the embodiment. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1. It is a perspective view which shows an example of the usage form of a thermally expandable member. It is a perspective view which shows an example of the usage form of a thermally expandable member. It is sectional drawing which shows an example of a refractory structure. It is sectional drawing which shows typically the state which the through-hole of a division part is closed. It is sectional drawing which shows the example of a change of a thermal expansion member.

Hereinafter, one embodiment of the thermally expandable member and the fireproof structure of the present invention will be described.
<Thermal expansion member>
As shown in FIGS. 1 and 2, the heat-expandable member 11 includes a heat-expanding material 12 that thermally expands by heat generated when the fire spreads, and a bag 13 that houses the heat-expanding material 12.

  As the thermal expansion material 12, a material commercially available as a thermal expansion material 12 for fire resistance of a building or the like, or a commercially available raw material can be mixed and used. The thermal expansion material 12 preferably contains expanded graphite, and more preferably further contains a shape stabilizer that stabilizes the shape of the expanded graphite after thermal expansion. Examples of the shape stabilizer include boric acid and resin. The expansion ratio of the expanded graphite is preferably 100 times or more, and more preferably 200 times or more. The expansion ratio of the expanded graphite is determined from the volume change when 1 g of the expanded graphite is heated at 900 to 1000 ° C. for 5 minutes. The upper limit of the expansion ratio of the expanded graphite is not particularly limited, but is, for example, less than 1000 times. The shape of the thermal expansion material 12 is preferably a shape having fluidity such as a paste or a powder.

  As shown in FIG. 2, the bag 13 is composed of a laminated film F having a synthetic resin layer L1 and a non-combustible material layer L2. The synthetic resin layer L1 of the laminated film F can be composed of a known synthetic resin film. Examples of the synthetic resin include polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polyolefin (polyethylene, polypropylene, etc.), polyamide, polystyrene, polyvinyl chloride, polyvinylidene chloride and the like. The type and thickness of the synthetic resin layer L1 may be selected in consideration of well-known physical properties such as mechanical properties. The synthetic resin film constituting the synthetic resin layer L1 can be selected from a uniaxially stretched film, a biaxially stretched film, a non-stretched film and the like. The number of the synthetic resin layers L1 in the laminated film F may be singular or plural.

The thickness of the synthetic resin layer L1 is, for example, preferably in the range of 3 μm or more and 500 μm or less, and more preferably in the range of 5 μm or more and 100 μm or less.
Examples of the non-combustible material layer L2 include a metal layer and an inorganic layer. Examples of the metal layer include an aluminum layer and a copper layer. The metal layer can be composed of a metal foil or a metal deposition film. Examples of the inorganic layer include a silica layer and an alumina layer. The inorganic layer can be composed of an inorganic vapor-deposited film.

  The number of the non-combustible material layers L2 in the laminated film F may be singular or plural. The non-combustible material layer L2 preferably includes a metal layer. The thickness of the non-combustible material layer L2 is preferably, for example, in the range of 5 nm or more and 100 μm or less. More preferably, the non-combustible material layer L2 includes a metal layer having a thickness of 1 μm or more.

  The laminated film F may have an adhesive layer, a coat film, a print layer, and the like. The laminated film F preferably has a non-combustible material layer L2 as an intermediate layer and a synthetic resin layer L1 as an outer layer and an inner layer. In this case, the non-combustible material layer L2 can be protected by the outer layer (protective layer), and the inner layer (sealant layer) can be thermally fused to make a bag. As the structure of the laminated film F, for example, in order from the outer layer, a three-layer structure composed of a polyethylene terephthalate film (12 μm), an aluminum foil (7 μm), and a polyethylene film (20 μm), a polyethylene terephthalate film (12 μm), and a polyethylene film (15 μm), an aluminum foil (7 μm), and a four-layer structure composed of a polyethylene film (20 μm).

  As shown in FIGS. 1 and 2, the bag 13 has a storage portion 13 a for storing the thermal expansion material 12. The shape of the bag 13 is a long square shape having a pair of long sides and a pair of short sides in plan view. In the bag 13, one of the long sides of the pair of long sides is formed by a bent portion 13 b formed by bending the laminated film F. Such a bent portion 13b can be formed by folding the long (band-shaped) laminated film F in two in the width direction.

  As shown in FIG. 1, the bag 13 connects the bent portion 13 b, an opposing portion 13 c opposing the bent portion 13 b with the housing portion 13 a interposed therebetween, and connects the bent portion 13 b and the opposing portion 13 c. It has side portions 13d, 13d located on both sides of the housing portion 13a. The facing portion 13c and both side portions 13d, 13d are sealed by heat fusion.

  In FIG. 2, a heat-sealed portion where the synthetic resin layers L1 (sealant layers) are heat-sealed to each other is schematically shown by a satin pattern. In the present embodiment, the portion between the bent portion 13b (one long side) and the housing portion 13a is also heat-sealed along the long side, but the bent portion 13b and the housing portion 13a It is also possible to omit the heat fusion of the portion between the two.

  The bag 13 of the present embodiment is a continuous packaging (continuous packaging) bag in which a plurality of storage portions 13a are arranged in a line along the length of the bag 13. The thermally expandable member 11 having the bag 13 can be easily bent using a portion (side portion 13d) between the adjacent storage portions 13a, 13a.

<Fireproof material>
Next, a refractory member provided with the thermal expansion member 11 will be described.
As shown in FIG. 3, the refractory member 21 includes a thermally expandable member 11, a shape maintaining member 22 made of a plastically deformable metal material, and a covering member 23 that covers the thermally expandable member 11 and the shape maintaining member 22. And

  The shape maintaining member 22 is plastically deformed with the thermal expansion of the thermal expansion material 12, and a part or the whole of the shape maintenance member 22 is embedded in an expansion body formed from the thermal expansion material 12. In this way, the shape maintaining member 22 maintains the shape of the expandable body by being the core material of the expandable body.

  The shape maintaining member 22 is arranged along one side of the thermally expandable member 11. Examples of the metal material forming the shape maintaining member 22 include iron, steel, and stainless steel. The shape maintaining member 22 is formed in a plate shape, and has a plurality of opening windows 22a penetrating in the thickness direction. The opening window 22a of the shape maintaining member 22 is arranged so as to be located at a position overlapping with the accommodating portion 13a of the bag 13 in the thermally expandable member 11. Note that the opening window 22a of the shape maintaining member 22 may be omitted, or the shape maintaining member 22 may be changed to a wire mesh, wire, or the like.

  The covering member 23 covers and holds the thermally expandable member 11 and the shape maintaining member 22 so as to be integrated. The covering member 23 has flammability, and can be constituted by an adhesive tape such as a cloth tape having a base layer and an adhesive layer laminated on the base layer. Both ends in the width direction of the adhesive tape are overlapped on the shape maintaining member 22 side.

<Fireproof structure>
Next, a fire-resistant structure using the heat-expandable member 11 (fire-resistant member 21) and its operation will be described.

  As shown in FIGS. 4 and 5, the fireproof structure includes a partition 31 having a through hole 31a, a pipe 32 inserted into the through hole 31a, and the fireproof member 21 (thermally expandable member 11). ing. The partition 31 of this embodiment is made of concrete, and extends in the horizontal direction to partition upper and lower floors. The pipe 32 has a flow path along the vertical direction, and is used for the purpose of flowing drainage. The tube 32 has a main tube made of resin such as polyvinyl chloride. The tube 32 may be configured by arranging a soundproof layer as necessary on the outer periphery of a resin main body tube.

  As shown in FIG. 4, the fire-resistant structure may include a locking tool 24 that holds the fire-resistant member 21 and locks the opening edge of the through hole 31 a (the upper surface of the partition 31). The metal locking member 24 has a holding portion 24a for holding the fire-resistant member 21 and a locking portion 24b for locking the opening edge of the through hole 31a. The number of the locking tools 24 may be a single number, or a plurality of locking tools 24 may be arranged apart from each other in the circumferential direction of the through hole 31a.

  The refractory member 21 is deformed so as to follow the inner peripheral shape of the through hole 31a, and is disposed between the inner peripheral surface of the through hole 31a and the outer peripheral surface of the tube 32. At this time, it is preferable that both ends in the length direction of the refractory member 21 be overlapped and fixed using an adhesive member such as an adhesive tape. Further, it is preferable that the refractory member 21 is arranged such that the shape maintaining member 22 is located inside the thermal expansion member 11 (on the center side of the through hole 31a). In addition, it is preferable that the refractory member 21 be disposed such that surfaces at both ends in the width direction of the covering member 23 are inner surfaces (center sides of the through holes 31a).

  As shown in FIG. 5, it is preferable that the refractory structure includes, at a position above the refractory member 21, a joint material 33 that closes a gap between the inner peripheral surface of the through hole 31 a and the outer peripheral surface of the tubular body 32. As the joint material 33, a commercially available joint material (backup material) for a building can be used. The shape of the joint material 33 is, for example, a columnar shape such as a prismatic shape or a cylindrical shape, and the material of the joint material 33 is an organic material such as rubber (ethylene-propylene-diene rubber, nitrile rubber, etc.), resin (polyethylene, etc.). Foams composed of molecular materials are preferred.

  In the fireproof structure configured as described above, the space below the partition 31 is the fire side, and the space above the partition 31 is the protection side that protects from fire spread. In the fire-resistant structure, the bag 13 of the heat-expandable member 11 is disposed with the bent portion 13b facing downward. Further, the bent portion 13b and the facing portion 13c (long side) of the bag 13 are arranged to extend in the circumferential direction of the through hole 31a of the partition portion 31 (the circumferential direction of the tube 32).

As shown in FIG. 6, when the refractory member 21 is heated by the spread of fire during a fire, the covering member 23 collapses or burns out, and the thermal expansion material 12 thermally expands to form an expansion body 34.
Here, the bag 13 is made of the laminated film F. Thereby, the collapse of the laminated film F due to the heat at the time of the fire spread can be delayed by the nonflammable material layer L2. For this reason, the laminated film F (the non-combustible material layer L2) can restrict the direction in which the thermal expansion material 12 thermally expands, and can restrict the movement of the expansion body 34 formed from the thermal expansion material 12. When the bag 13 is arranged with the bent portion 13b facing downward as in the fireproof structure of the present embodiment, the thermal expansion of the thermal expansion material 12 downward due to the laminated film F (the non-combustible material layer L2) can be prevented. The downward movement of the expansion body 34 can be restricted.

Next, the operation and effect of the present embodiment will be described.
(1) The heat-expandable member 11 is used for the purpose of suppressing the spread of fire through the through-hole 31a of the partition 31 into which the tube 32 is inserted. The heat-expandable member 11 has a heat-expanding material 12 that thermally expands due to heat generated when the fire spreads, and a bag 13 that houses the heat-expandable material 12. The bag 13 is composed of a laminated film F having a synthetic resin layer L1 and a non-combustible material layer L2.

  According to this configuration, the collapse of the laminated film F can be delayed by the non-combustible material layer L2 as described above, so that the movement of the expansion body 34 can be limited by the laminated film F (the non-combustible material layer L2). . Therefore, it is easy to form the expansion body 34 at a predetermined position.

  (2) One long side of the pair of long sides of the bag 13 is constituted by a bent portion 13b formed by bending the laminated film F. In this case, the laminated film F (the non-combustible material layer L2) connected by the bent portion restricts the direction in which the thermal expansion material 12 thermally expands, or moves the expansion body 34 formed from the thermal expansion material 12. And can be restricted. Therefore, it is easier to form the expansion body 34 at a predetermined position.

  (3) The partition 31 of the fire-resistant structure of the present embodiment is arranged so as to partition the upper and lower floors. The bag 13 is disposed with the bent portion 13b facing downward. In this case, the downward thermal expansion of the thermal expansion material 12 and the downward movement of the expansion body 34 can be restricted. Therefore, it becomes easy to arrange the expansion body 34 in the through hole 31a or at a position closer to the through hole 31a.

  (4) One of the long sides of the pair of long sides of the bag 13 is formed by a bent portion 13b formed by bending the laminated film F, and the facing portion 13c faces the bent portion 13b with the storage portion 13a interposed therebetween. Are sealed by heat fusion. In this case, since the heat-sealed portion located at the facing portion 13c of the bag 13 is easily peeled off by the heat caused by the spread of fire at the time of fire, the thermal expansion material 12 in the storage portion 13a bulges out of the facing portion 13c of the bag 13. Thermal expansion. Thereby, the thermal expansion material 12 can be thermally expanded more quickly toward the side opposite to the bent portion 13b.

(Example of change)
This embodiment can be implemented with the following modifications. The present embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.

  The refractory structure may have a caulking material 35 applied so as to cover the joint material 33 as shown by a two-dot chain line in FIG. As the caulking material 35, for example, a silicone caulking material can be used.

  -As shown in FIG. 7, both long sides of the bag 13 may be constituted by the bent portions 13b. The bag 13 (laminated film F) is heat-sealed at an intermediate portion 13e between both long sides of the laminated film F. In the fire-resistant structure using the bag 13 (the heat-expandable member 11), the heat-expanding structure is such that the intermediate portion 13e (the heat-sealed portion) is located at the center side (the inner peripheral side) of the through hole 31a of the partition portion 31. It is preferable to dispose the member 11. In this case, the thermal expansion material 12 easily expands toward the center (inner peripheral side) of the through hole 31a of the partition portion 31, so that the through hole 31a can be more quickly closed.

  -Although the accommodating part 13a of the bag 13 is formed by heat fusion of the laminated film F (synthetic resin layer L1), it may be formed by bonding the laminated film F using an adhesive. In this case, the synthetic resin layer L1 (sealant layer) which is the inner layer of the laminated film F can be omitted.

  The bent portion 13b of the bag 13 can be omitted. That is, the housing portion 13a can be formed by laminating a pair of laminated films in a frame shape by heat bonding of an adhesive (adhesive layer) or the synthetic resin layer L1.

  -The number of the accommodating portions 13a of the bag 13 is not limited to a plurality, and may be a single. That is, the storage section of the bag 13 can be constituted of, for example, one storage section that is continuous along the long side of the bag 13. However, since the thermal expansion material 12 is not biased toward one end in the length direction of the bag 13 and the thermal expansion material 12 is easily dispersed and arranged in the inner circumferential direction of the through hole 31a, the bag 13 Preferably has a plurality of housing portions 13a arranged as in the above embodiment.

The shape of the storage portion 13a of the bag 13 is not limited to a square shape such as a square shape or a rectangular shape in plan view, and may be a polygonal shape or a circular shape other than the square shape.
In the fire-resistant structure (fire-resistant member 21), the dimensions and number of the heat-expandable members 11 (bags 13) may be changed as appropriate. For example, the heat-expandable member 11 has a length dimension that can be wound around the tube 32 in the fire-resistant structure, The length dimension of the inflatable member can also be changed. Note that the shape of the bag 13 may be square in plan view.

  In the fire-resistant structure (fire-resistant member 21), the covering member 23 may be omitted, and the heat-expandable member 11 and the shape maintaining member 22 may be integrated by a joint such as a double-sided tape or an adhesive. Note that the heat-expandable member 11 and the shape maintaining member 22 may be separately provided without being integrated.

In the fire resistant structure (fire resistant member 21), both the covering member 23 and the shape maintaining member 22 can be omitted.
In the fire-resistant structure, the heat-expandable member 11 is fixed to the tube 32 with an adhesive or an adhesive tape without using the locking tool 24, or the inner peripheral surface of the through hole 31a and the outer peripheral surface of the tube 32 It can also be fixed by sandwiching the heat-expandable member 11 between them.

  In the fire-resistant structure (fire-resistant member 21), the heat-expandable member 11 is disposed between the inner peripheral surface of the through-hole 31a and the outer peripheral surface of the tubular body 32, but at a position lower than the through-hole 31a. It may be arranged. However, it is preferable to arrange the thermal expansion member 11 so that at least a part of the thermal expansion member 11 is located between the inner peripheral surface of the through hole 31a and the outer peripheral surface of the tube 32.

  In the fireproof structure, the pipe 32 inserted into the through hole 31a of the partition 31 has a resin main pipe, but may be changed to a pipe having a metal main pipe such as cast iron. . In this case, by arranging the heat-expandable member 11 on the inner peripheral side of the metal main body pipe or on the outer peripheral side of the resin main body pipe connected to the metal main body pipe, the partitioning portion 31 at the time of fire spread can be used. The through hole 31a can be closed.

  -Although the partition part 31 of a fireproof structure partitions the upper and lower floors, it may be a partition part which partitions a space to the left and right. The pipe inserted into the through hole of the partition has a flow path extending in the left-right direction. The pipe may be used for purposes other than the purpose of distributing wastewater.

F: laminated film, L1: synthetic resin layer, L2: non-combustible material layer, 11: heat-expandable member, 12: heat-expandable material, 13: bag, 13b: bent portion, 31: partition portion, 31a: through hole, 32 ... tubular body.

Claims (5)

A thermally expandable member used for suppressing the spread of fire through the through hole of the partition where the tube is inserted,
Having a thermal expansion material that thermally expands by the heat of the fire, and a bag that stores the thermal expansion material,
The said bag is comprised from the laminated film which has a synthetic resin layer and a nonflammable material layer, The thermal expansion member characterized by the above-mentioned. The shape of the bag is a long rectangular shape having a pair of long sides and a pair of short sides in plan view,
The thermal expansion member according to claim 1, wherein at least one of the long sides of the pair of long sides is formed by a bent portion formed by bending the laminated film.   The thermal expansion member according to claim 1, wherein the nonflammable material layer includes a metal layer. A fireproof structure including a partition having a through hole, a pipe inserted into the through hole, and a thermally expandable member that suppresses fire spread through the through hole,
The thermal expansion member,
Having a thermal expansion material that thermally expands by the heat of the fire, and a bag that stores the thermal expansion material,
The said bag is comprised from the laminated film which has a synthetic resin layer and a nonflammable material layer, The fireproof structure characterized by the above-mentioned. The partition is arranged to partition the upper and lower floors,
The shape of the bag is a long rectangular shape having a pair of long sides and a pair of short sides in plan view,
Of the pair of long sides, at least one long side is configured by a bent portion formed by bending the laminated film,
The fireproof structure according to claim 4, wherein the bag is arranged with the bent portion facing downward.