JP6914726B2 - Fireproof pack member - Google Patents

Description

The present invention relates to a fireproof pack member.

Generally, the internal space of a building is divided into a plurality of room spaces by compartments such as walls, floors, and ceilings. In order to dispose a long body such as a pipe or a cable over these a plurality of room spaces, a through hole may be formed in the compartment and the long body may be inserted through the through hole. In this case, in order to prevent the spread of fire in the event of a fire in a certain room space, it is necessary to take fire prevention measures in the gap between the through hole and the long body.

For example, Japanese Patent Application Laid-Open No. 2005-73357 (Patent Document 1) discloses a fireproof structure using a fireproof pack member containing a paste-like heat-expandable fireproof material sealed inside a bag. The refractory pack member is wound around the elongated body on the opening side of the receiver installed in the through hole of the compartment, and then pushed into the through hole (receiver). Then, the refractory pack member fills the gap generated between the inner surface of the through hole and the outer surface of the elongated body while being held by the receiver.

In the refractory pack member of Patent Document 1, the inner surface of the bag body is in close contact with the paste-like heat-expandable refractory material on the entire surface, and the refractory pack member can be freely deformed as it is. Since this refractory pack member has flexibility that allows it to be deformed, it has an advantage that it easily fits into an uneven curved surface. However, on the other hand, there are drawbacks that it is not easy to push the compartment into the through hole and that sagging is likely to occur after construction.

Japanese Unexamined Patent Publication No. 2005-733557

It is desired to realize a refractory pack member that can be easily pushed into the through hole of the compartment, easily fits into an uneven curved surface, and is less likely to sag after construction.

The refractory pack member according to the present invention is
With a flexible bag body,
A paste-like heat-expandable refractory material enclosed inside the bag body,
It includes a shape-retaining member integrated with the bag body.

According to this configuration, since the bag body has flexibility and the heat-expandable refractory material is in the form of a paste, it is possible to impart deformable flexibility to the refractory pack member. Therefore, it is easy to fit into an uneven curved surface, and the gap between the through hole and the long body can be appropriately filled inside the through hole. Further, by integrating the shape-retaining member with the bag body, the shape-retaining property of the fireproof pack member can be improved by the shape-retaining member. Therefore, the operation of pushing the refractory pack member into the through hole can be easily performed, and the occurrence of sagging of the refractory pack member after construction can be suppressed.

Hereinafter, preferred embodiments of the present invention will be described. However, the scope of the present invention is not limited by the preferred embodiments described below.

As one aspect
It is preferable that the shape-retaining member is made of a nonflammable material.

According to this configuration, the shape-retaining member additionally provided in the fire-resistant pack member including the bag body and the heat-expandable fire-resistant material enclosed therein is also nonflammable, so that the fire-resistant pack member can be used for fire resistance. Can be suitably used for the purpose of.

As one aspect
It is preferable that the shape-retaining member is a metal sheet material.

According to this configuration, the shape retention of the refractory pack member can be improved without impairing the deformable flexibility of the refractory pack member. Further, since the entire refractory pack member is suppressed to be relatively thin, even if the gap between the through hole and the long body is narrow, the entire refractory pack member including the shape-retaining member can be easily inserted into the gap. be able to.

As one aspect
It is preferable that the shape-retaining member is enclosed inside the bag body in a state of being integrated with the bag body at least in part.

According to this configuration, by enclosing the shape-retaining member inside the bag body, even if the gap between the through hole and the long body is narrow, the refractory pack member including the shape-retaining member can be inserted into the gap. The whole can be easily inserted. Further, by integrating at least a part of the shape-retaining member with the bag body, the installation position of the shape-retaining member can be stably held inside the bag body. Therefore, the shape retention of the refractory pack member as a whole can be enhanced, and the pushing operation can be facilitated and sagging can be prevented.

As one aspect
It is preferable that the width of the portion of the shape-retaining member located inside the bag body is shorter than the width of the internal space of the bag body.

According to this configuration, since at least one end of the shape-retaining member is an open end, a paste-like heat-expandable refractory material can flow inside the bag through the open end of the shape-retaining member. Therefore, even if the refractory pack member is deformed so as to be wound around a long body or adapted to an uneven curved surface, the flow of the heat-expandable refractory material that may occur due to the deformation is not so hindered. .. Therefore, it is possible to facilitate operations such as winding around a long body and following a shape on a curved surface having irregularities.

As one aspect
The bag body is made of a resin film material and has a laminated portion along the peripheral portion thereof.
It is preferable that the shape-retaining member is sandwiched between the two film materials in the laminated portion.

According to this configuration, the film material is heat-sealed to form a bag body while sealing the heat-expandable refractory material, and at the same time, the shape-retaining member is integrated with the bag body and sealed inside the bag body. Therefore, the manufacturing process can be simplified. Further, according to the above configuration, the portion of the shape-retaining member sandwiched between the film materials is exposed from the heat-expandable refractory material without being buried in the paste-like heat-expandable refractory material. Therefore, for example, heat at the time of a fire is easily transferred to the shape-retaining member, and further, heat is easily transferred to the entire heat-expandable refractory material through the shape-retaining member. In particular, when the shape-retaining member is a metal sheet material, such an effect becomes remarkable due to the high thermal conductivity of the metal material. Therefore, the heat-expandable refractory material can be efficiently expanded when necessary, and the performance as a refractory pack member can be enhanced.

Further features and advantages of the present invention will be further clarified by the following illustration of exemplary and non-limiting embodiments described with reference to the drawings.

Breaking perspective view of the fire protection structure according to the embodiment Breaking perspective view of refractory pack member Perspective view showing one aspect of the construction procedure of the fire protection structure Perspective view showing one aspect of the construction procedure of the fire protection structure Cross section of fire protection structure

An embodiment of the refractory pack member according to the present invention will be described with reference to the drawings. In the present embodiment, an example in which the fireproof pack member according to the present invention is applied to the fire prevention measure unit 100 for the purpose of preventing the spread of fire and the fire prevention measure structure using the same will be described. The fire prevention unit 100 of the present embodiment includes a tubular sleeve member 8 inserted into a through hole 6H formed in a building compartment 6 and a fireproof pack member 1 supported inside the sleeve member 8. To be equipped. The refractory pack member 1 of the present embodiment has a flexible bag body 12, a paste-like heat-expandable refractory material 14 sealed inside the bag body 12, and a shape-retaining body integrated with the bag body 12. It includes a member 16. As a result, it is possible to provide the refractory pack member 1 which is easy to push into the through hole 6H of the compartment 6 and is easily adapted to a curved surface having irregularities and is less likely to sag after construction. Hereinafter, the fire protection unit 100 and the fire protection structure using the fireproof pack member 1 of the present embodiment will be described in detail.

In the following description, the "axial direction L", the "circumferential direction C", and the "diameter direction" are defined with reference to the elongated body 7 inserted into the through hole 6H. That is, the extending direction of the long body 7 is the axial direction L, the direction of orbiting around the long body 7 is the circumferential direction C, and the direction orthogonal to the extending direction of the long body 7 is the radial direction. Is. In addition, the terms related to the direction, dimensions, and the like used in the following description are concepts that include a state in which there is a difference due to an error (an error that is acceptable in manufacturing).

In the present embodiment, the compartment 6 to which the fire protection structure is applied is a fire resistance and fire protection structure that divides the space in the building into a plurality of room spaces. The compartment 6 may be, for example, a wall portion that horizontally partitions a plurality of room spaces as shown in FIG. 1, or a floor (or ceiling; not shown) that vertically divides the plurality of room spaces. It may be. The compartment 6 may be a solid wall such as a reinforced concrete structure (RC) or a lightweight aerated concrete structure (ALC), or a hollow wall such as gypsum board. Of course, those having a structure other than these may be used as the compartment 6.

The compartment 6 is formed with a through hole 6H that penetrates the compartment 6 in the thickness direction (horizontal direction in the illustrated example). In this embodiment, a circular through hole 6H is formed. However, the specific shape of the through hole 6H is not limited to such a configuration, and may be, for example, an elliptical shape, a polygonal shape, or various other shapes.

A long body 7 is inserted through the through hole 6H of the compartment 6. The elongated body 7 has an elongated structure extending in one direction, such as a linear body, a tubular body, and a strip-shaped body. Examples of such a long body 7 include piping for an air conditioner. In the present embodiment, the elongated body 7 includes a piping member 71 for circulating a refrigerant, a drain pipe 72 for discharging drain water, and an electric cable 73.

The piping member 71 has a fluid pipe 71A through which the refrigerant flows, and a covering material 71B that covers the periphery of the fluid pipe 71A. The fluid pipe 71A is, for example, a tubular member made of metal, and the covering material 71B is, for example, a heat insulating material made of synthetic resin, which is exteriorized by the fluid pipe 71A. The drain pipe 72 is, for example, a tubular member made of synthetic resin. The electric cable 73 is configured by providing an insulating coating material around the conductor wire. In the present embodiment, the plurality of elongated bodies 7 are inserted into the through hole 6H in a bundle. A bundle of long bodies 7 are densely arranged in the through hole 6H so that their outer surfaces are in contact with each other. Then, a valley space V is formed over the outer surfaces of the elongated bodies 7 adjacent to each other.

A fire protection structure is provided in the gap space S between the through hole 6H and the plurality of elongated bodies 7. The gap space S is a space that extends in a radial gap between the inner surface of the through hole 6H and the outer surface of each of the plurality of elongated bodies 7. The fire protection structure of the present embodiment is realized by using a fire protection unit 100 including a tubular sleeve member 8 and a fire protection pack member 1 including a heat-expandable fire resistant material 14.

The sleeve member 8 includes a sleeve main body 81 and a flange 82 provided at one end of the sleeve main body 81 in the axial direction L. In the present embodiment, the sleeve main body 81 is formed as a curved plate-shaped portion that is curved in a cylindrical shape so that both end portions in the circumferential direction C face each other in the circumferential direction C. The flange portion 82 is integrally formed with the sleeve main body portion 81 in a state of extending radially outward from the sleeve main body portion 81. The flange portion 82 is provided over the entire circumference. The sleeve member 8 includes a support piece portion (not shown) protruding inward in the radial direction from the sleeve main body 81 at the end of the sleeve main body 81 on the side opposite to the flange 82 in the axial direction L. But it's okay. When such a support piece portion is provided, the support piece portion supports the refractory pack member 1 in the axial direction L. The sleeve member 8 may be made of resin, for example.

The fireproof pack member 1 is a member for blocking the gap space S between the through hole 6H and the elongated body 7 to prevent the spread of fire in the event of a fire. As shown in FIG. 2, the fireproof pack member 1 includes a bag body 12, a heat-expandable fireproof material 14, and a shape-retaining member 16. The bag body 12 has flexibility. The bag body 12 can be formed of, for example, a resin film material (for example, a plastic film such as a polyethylene film or a nylon film). The bag body 12 is formed by superimposing, for example, two rectangular film materials (a rectangular shape having a long side along the first direction D1 and a short side along the second direction D2 orthogonal to the first direction D1). , The peripheral portion thereof can be fused and formed. The bag body 12 has a laminated portion 12A along the peripheral edge portion thereof, and an accommodation space P is formed inside the bag body 12 as a space sealed by the laminated portion 12A.

The heat-expandable refractory material 14 is enclosed inside the bag body 12. The heat-expandable refractory material 14 is housed in a storage space P formed inside the bag body 12. The heat-expandable refractory material 14 has thermal expandability (property that the volume increases by heating) and fire resistance (property that easily withstands thermal heat, a property that has a high melting temperature and is hard to burn). As the heat-expandable refractory material 14, a known material can be used without particular limitation, and for example, a putty-like member (heat-expandable putty-like refractory material) can be used. However, the heat-expandable refractory material 14 of the present embodiment contains a plasticizer (water in the case of water, oil in the case of oil) more than usual, and is in the form of a paste as a whole.

The paste-like heat-expandable refractory material 14 is sufficiently softer than the known putty-like refractory material. The conventional putty-like refractory material has a consistency of about 50 to 80, whereas the paste-like heat-expandable refractory material 14 of the present embodiment has a consistency of, for example, about 80 to 400. By enclosing such a soft heat-expandable refractory material 14 in a flexible bag body 12 and using it, the refractory pack member 1 can be deformed relatively freely. Then, by deforming the refractory pack member 1, it is possible to easily fill the valley space V extending over the outer surface of each of the elongated bodies 7 adjacent to each other with the heat-expandable refractory material 14.

The consistency of the paste-like heat-expandable refractory material 14 is preferably large from the viewpoint of facilitating the deformation of the refractory pack member 1. The consistency of the heat-expandable refractory material 14 is preferably, for example, about 150 to 390, and more preferably about 300 to 380. Of course, for example, a heat-expandable refractory material 14 having a consistency of 300 or less may be used.

In the present specification, "consistency" is defined in JIS K2220 5.3 (concentration test method) using a needle insertion degree meter specified in JIS K2235 5.4.2 (1). The needle and weight on the meter shall be replaced with a cone for measurement. More specifically, the above cone is vertically inserted into the sample for 5 seconds, the depth of the cone is measured in units of 0.1 mm, and the value obtained by multiplying this by 10 (dimensionless number) is referred to as "consistency". do. Here, the cone has the shape and dimensions shown in FIG. 9 of JIS K2235 5.10.2 (2), its mass is 102.5 ± 0.05 g, and the holder supporting the cone is JIS K2235 5.4. It is specified in .2 (3), and its mass is 47.5 ± 0.05 g.

The heat-expandable refractory material 14 expands in the thickness direction when heated to, for example, 200 ° C. or higher. The coefficient of thermal expansion of the refractory pack member 1 including the heat-expandable refractory material 14 may be, for example, 2 to 40 times.

The shape-retaining member 16 is integrated with the bag body 12. In the present embodiment, the shape-retaining member 16 is enclosed inside the bag body 12 together with the heat-expandable refractory material 14. Most of the shape-retaining member 16 is housed in the storage space P inside the bag body 12 together with the heat-expandable refractory material 14. The shape-retaining member 16 is a member for enhancing the overall shape-retaining property of the refractory pack member 1. The shape-retaining member 16 is composed of at least a bag body 12 and a member having a higher rigidity than the heat-expandable refractory material 14. In the present embodiment, the shape-retaining member 16 is composed of a sheet-like member (metal sheet material 16S) formed of a metal material (an example of a nonflammable material).

The metal sheet material 16S is a metal foil (for example, copper foil, silver foil, gold foil, aluminum foil, titanium foil, nickel foil, zinc foil, tin foil, iron foil, and stainless steel) obtained by thinly spreading a metal material having good malleability. Foil, etc.) may be used. By enclosing such a metal sheet material 16S as a shape-retaining member 16 inside the bag body 12, the shape-retaining property of the refractory pack member 1 can be enhanced by the metal sheet material 16S. Therefore, the operation of pushing the refractory pack member 1 into the through hole 6H can be easily performed, and the occurrence of sagging of the refractory pack member 1 after construction can be suppressed.

The thickness of the metal sheet material 16S can be set to, for example, 0.02 mm to 0.2 mm. If the thickness of the metal sheet material 16S is less than 0.02 mm, the strength of the metal sheet material 16S itself becomes insufficient, and it is not possible to impart sufficient shape retention to the refractory pack member 1. On the other hand, if the thickness of the metal sheet material 16S exceeds 0.2 mm, the strength of the metal sheet material 16S itself may become excessive and the flexibility of the refractory pack member 1 as a whole may be impaired. By setting the thickness of the metal sheet material 16S to 0.02 mm to 0.2 mm, it is possible to achieve both flexibility and shape retention in the refractory pack member 1.

When the improvement of shape retention is prioritized in order to facilitate the pushing operation of the refractory pack member 1 and prevent sagging, the thickness of the metal sheet material 16S may be, for example, 0.05 mm or more. It is preferably 0.1 mm or more, and more preferably 0.1 mm or more. When priority is given to improving flexibility in order to make it easier to fit into an uneven curved surface (valley space V over the outer surfaces of adjacent long bodies 7), the thickness of the metal sheet material 16S is, for example, 0. It is preferably 0.05 mm or less, and more preferably 0.04 mm or less.

In the present embodiment, the metal sheet material 16S has a rectangular shape that is flatter than the bag body 12 (a rectangular shape having a long side having a length similar to that of the bag body 12 and a short side shorter than the bag body 12). ) Is formed. The length of the short side of the metal sheet material 16S can be set to, for example, 50% to 90% of the length of the short side of the bag body 12. In this way, the width of the portion of the metal sheet material 16S located inside the bag body 12 (width along the second direction D2) is the width of the accommodation space P inside the bag body 12 (width along the second direction D2). (See Figure 2).

As shown in FIG. 2, the metal sheet material 16S is enclosed inside the bag body 12 in a state of being integrated with the bag body 12 at least in part. In the present embodiment, one end (one long side portion) of the rectangular metal sheet material 16S in the second direction D2 is one end (one long side portion) of the bag body 12 in the second direction D2. It is fused and integrated with the laminated portion 12A). In such a configuration, the other end of the metal sheet material 16S in the second direction D2 is integrated with the bag body 12 due to the length of each short side of the bag body 12 and the metal sheet material 16S. It is an open end without any problems. In the present embodiment, both ends of the metal sheet material 16S in the first direction D1 are also fused and integrated with the bag body 12.

In the present embodiment, the accommodation space P inside the bag body 12 is first accommodated by the metal sheet material 16S which is fused and integrated with the bag body 12 at at least one end and has an open end at the other end. It is divided into a part P1, a second accommodating part P2, and a communication part P3. The first accommodating portion P1 is formed between one of the two film materials constituting the bag body 12 and the metal sheet material 16S. The second accommodating portion P2 is formed between the other of the two film materials constituting the bag body 12 and the metal sheet material 16S. The first accommodating portion P1 and the second accommodating portion P2 are arranged adjacent to each other in the thickness direction with the metal sheet material 16S interposed therebetween. The communication portion P3 communicates the first accommodating portion P1 and the second accommodating portion P2 on the side opposite to the integrated end portion of the bag body 12 and the metal sheet material 16S in the second direction D2.

The paste-like heat-expandable refractory material 14 can flow between the first accommodating portion P1 and the second accommodating portion P2 via the communicating portion P3 inside the bag body 12. Therefore, even if the refractory pack member 1 is deformed in order to be wound around the long body 7 or to follow the valley space V extending over the outer surface of each of the adjacent long bodies 7, the deformation is caused by the deformation. The possible flow of the heat-expandable refractory material 14 inside the bag body 12 is not so hindered. Therefore, it is possible to facilitate work such as winding around the long body 7 and following the shape of the valley space V, and it is possible to improve workability.

Hereinafter, the construction procedure of the fire prevention measure structure realized by using the fire prevention measure unit 100 of the present embodiment will be described. First, as shown in FIG. 3, a bundle of long bodies 7 is arranged outside the through hole 6H in a state where a bundle of a plurality of long bodies 7 is arranged in the through hole 6H formed in the compartment 6 of the building. The sleeve member 8 is arranged so as to surround the circumference of the body 7. At this time, the sleeve member 8 is arranged around a bundle of long bodies 7 in a state where the divided ends of the sleeve member 8 are separated from each other and expanded, and then the sleeve member 8 is formed into a tubular shape in the through hole 6H. insert.

Next, the refractory pack member 1 is arranged outside the through hole 6H so as to surround the circumference of the bundle of elongated bodies 7, and has a tubular shape slightly smaller than the sleeve member 8. Then, in that state, the refractory pack member 1 is inserted in the axial direction L into the space between the sleeve member 8 and the long body 7 (the gap space S between the through hole 6H and the long body 7). This operation may be performed so that the side of the integrated end portion of the bag body 12 and the metal sheet material 16S in the refractory pack member 1 is inserted as the head. At this time, the metal sheet material 16S is sealed inside the bag body 12 together with the heat-expandable refractory material 14, and the shape retention of the refractory pack member 1 is enhanced, so that the refractory pack member 1 can be easily provided. It can be inserted all the way. Therefore, it is possible to improve the workability when applying fire protection measures to the through hole 6H of the compartment 6.

After that, as shown in FIGS. 4 and 5, the fireproof pack member 1 is deformed inside the through hole 6H to follow the shape of the valley space V extending over the outer surface of each of the elongated bodies 7 adjacent to each other. Since the refractory pack member 1 is formed by encapsulating the paste-like heat-expandable refractory material 14 and is soft, the shape can be easily followed by a plurality of valley spaces V formed on the outer surface of a bundle of long bodies 7. Can be done. A metal sheet material 16S is enclosed inside the bag body 12 in order to improve shape retention, but it is easily deformed when an external force (operator's operating force) exceeding a predetermined value is applied. Therefore, the shape followability of the refractory pack member 1 is not impaired by the presence of the metal sheet material 16S. Therefore, the gap space S between the through hole 6H and the elongated body 7 can be sufficiently filled including the plurality of valley spaces V.

After construction, the shape of the refractory pack member 1 is maintained by the presence of the metal sheet material 16S, so that the refractory pack member 1 is formed by encapsulating the paste-like heat-expandable refractory material 14 and is soft. However, the occurrence of sagging can be effectively suppressed. In particular, even when the refractory pack member 1 containing the heat-expandable refractory material 14 having a consistency of 300 or more is used, the occurrence of sagging can be effectively suppressed over a long period of time.

When a fire breaks out in a building, the ambient temperature rises due to the heat of the flame, the covering material 71B constituting the long body 7 melts and burns, and the gap space S between the through hole 6H and the long body 7 is created. There is a possibility of further expansion. Even in this case, the heat-expandable refractory material 14 contained in the fire-resistant pack member 1 thermally expands in response to an increase in the ambient temperature, and fills the space created by the melting and combustion of the coating material 71B (in other words, in other words. The increase in the gap volume can be compensated for). In particular, in the present embodiment, the valley space V is sufficiently filled by making the soft fireproof pack member 1 follow the shape of the valley space V, so that sufficient fire protection performance is imparted.

Further, in the present embodiment, the metal sheet material 16S sealed inside the bag body 12 in a state of being fused and integrated with the bag body 12 at at least one end functions as a kind of heat transfer plate in the event of a fire. .. That is, of the metal sheet material 16S, the heat at the time of a fire is likely to be transferred to the portion exposed from the heat-expandable refractory material 14 without being buried in the heat-expandable refractory material 14. Then, once heat is transferred to the end portion of the metal sheet material 16S, the heat is transferred to the entire metal sheet material 16S having high thermal conductivity. As a result, heat is easily transferred to the entire heat-expandable refractory material 14 through the metal sheet material 16S whose temperature has been raised as a whole. Therefore, the heat-expandable refractory material 14 can be efficiently expanded when a fire occurs, and the fire protection performance can be improved from this point as well.

[Other Embodiments]
(1) In the above embodiment, a configuration in which at least one end of the metal sheet material 16S is fused and integrated with the bag body 12 has been described as an example. However, without being limited to such a configuration, the metal sheet material 16S may be fused and integrated with the bag body 12 at, for example, the central portion. The bag body 12 and the metal sheet material 16S are not limited to the form of being fused and integrated in a planar shape, and may be fused and integrated in various forms such as a linear shape, a wavy shape, a zigzag shape, and a dot shape. Further, the metal sheet material 16S may be configured to float inside the bag body 12 without being fused and integrated with the bag body 12 at any position.

(2) In the above embodiment, a configuration in which the bag body 12 and the metal sheet material 16S are integrated by fusion is described as an example. However, the bag body 12 and the metal sheet material 16S may be integrated in various forms such as adhesion, sewing, tacking, and fastening without being limited to such a configuration.

(3) In the above embodiment, one end of the metal sheet material 16S other than the end integrated with the bag body 12 is an open end without being integrated with the bag body 12 (of the bag body 12). The configuration (where the internal accommodation space P has the communication portion P3) has been described as an example. However, without being limited to such a configuration, for example, both ends of the second direction D2 of the metal sheet material 16S may be integrated with the bag body 12. In this case, the metal sheet material 16S is formed in substantially the same shape as the bag body 12 (rectangular shape having a long side and a short side having the same length as the bag body 12).

(4) In the above embodiment, a configuration in which both ends of the metal sheet material 16S in the first direction D1 are integrated with the bag body 12 has been described as an example. However, without being limited to such a configuration, for example, both ends of the metal sheet material 16S in the first direction D1 remain in the accommodation space P inside the bag body 12 without being integrated with the bag body 12. You may. In this case, the length of the long side of the metal sheet material 16S may be set to be about the same as or shorter than the length along the first direction D1 of the accommodation space P.

(5) In the above embodiment, a configuration in which two film materials are superposed and fused on all sides to form a bag body 12 has been described as an example. However, the present invention is not limited to such a configuration, and for example, one film material may be folded in half and overlapped, and the four sides or the three sides excluding the fold portion may be fused to form the bag body 12.

(6) In the above embodiment, a configuration in which one metal sheet material 16S is enclosed in the bag body 12 has been described as an example. However, without being limited to such a configuration, for example, the metal sheet material 16S may be enclosed in the bag body 12 in a state of being divided into a plurality of sheets. Alternatively, a plurality of metal sheet materials 16S may be enclosed in the bag body 12 in a state of being overlapped with each other.

(7) In the above embodiment, a configuration in which the metal sheet material 16S is enclosed inside the bag body 12 together with the heat-expandable refractory material 14 has been described as an example. However, without being limited to such a configuration, for example, the metal sheet material 16S may be integrated with the bag body 12 outside the bag body 12.

(8) In the above embodiment, an example in which the shape-retaining member 16 is made of a metal sheet material 16S has been described. However, without being limited to such a configuration, the shape-retaining member 16 is preferably formed of at least a non-combustible material, and the shape-retaining member 16 may be formed of, for example, non-combustible paper or non-combustible resin. Further, the shape-retaining member 16 does not necessarily have to be nonflammable, as long as the shape-retaining member 16 can at least improve the overall shape-retaining property of the refractory pack member 1. For example, the shape-retaining member 16 is formed of a flame-retardant material or a flammable material. May be done. The shape-retaining member 16 is not limited to the sheet material (sheet shape), and may be mesh-shaped, lattice-shaped, rod-shaped (stick-shaped), or the like.

(9) In the above embodiment, the configuration using the refractory pack member 1 in which only the paste-like heat-expandable refractory material 14 is sealed inside the bag body 12 has been mainly described. However, without being limited to such a configuration, as the fireproof pack member 1, in addition to the paste-like heat-expandable fireproof material 14 inside the bag body 12, for example, inorganic fibers or the like as a non-paste-like filler Those containing other components such as inorganic spheres may be used.

(10) In the above embodiment, a configuration in which the sleeve member 8 and the refractory pack member 1 are separated from each other has been described as an example. However, the present invention is not limited to such a configuration, and the sleeve member 8 and the refractory pack member 1 may be integrated at one end of the sleeve member 8 in the axial direction L. In this case, the sleeve member 8 and the refractory pack member 1 may be integrated over the entire area of the circumferential direction C, or may be integrated intermittently in the circumferential direction C, for example.

(11) In the above embodiment, the configuration in which the refractory pack member 1 is supported by the resin sleeve member 8 inside the through hole 6H has been described as an example. However, without being limited to such a configuration, the refractory pack member 1 may be supported inside the through hole 6H by, for example, a support member formed of a metal wire, instead of the sleeve member 8. In this case, the refractory pack member 1 may be supported by the support member via a backup material.

(12) The configurations disclosed in each of the above-described embodiments (including the above-described embodiment and other embodiments; the same shall apply hereinafter) shall be applied in combination with the configurations disclosed in the other embodiments as long as there is no contradiction. It is also possible to do. As for other configurations, the embodiments disclosed in the present specification are examples in all respects, and can be appropriately modified without departing from the spirit of the present disclosure.

1 Fireproof pack member 12 Bag body 12A Laminated part 14 Thermal expansion fireproof material 16 Shape-retaining member 16S Metal sheet material P Storage space P3 Communication part

Claims (6)

With a flexible bag body,
A paste-like heat-expandable refractory material enclosed inside the bag body,
Comprising a shape retention member,
A fireproof pack member in which the shape-retaining member is enclosed inside the bag body in a state where the shape-retaining member is integrated with the bag body at least in part. The fireproof pack member according to claim 1, wherein the shape-retaining member is made of a nonflammable material. The fireproof pack member according to claim 1 or 2, wherein the shape-retaining member is a metal sheet material. The fireproof pack member according to any one of claims 1 to 3, wherein the shape-retaining member is enclosed in the bag body in a state of being embedded in the heat-expandable fireproof material. The fireproof pack member according to any one of claims 1 to 4, wherein the width of a portion of the shape-retaining member located inside the bag body is shorter than the width of the internal space of the bag body. The bag body is made of a resin film material and has a laminated portion along the peripheral portion thereof.
The fireproof pack member according to any one of claims 1 to 5, wherein the shape-retaining member is sandwiched between two film materials in the laminated portion.

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