JP6980879B1 - Gap closing method and gap closing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability when applying fire prevention measures to a gap space between a through hole and a long body, and to appropriately apply such fire prevention measures. SOLUTION: In a gap closing method, a non-combustible region (36) is substantially parallel to an inner surface of a through hole (6H) in a gap space (S) between a through hole (6H) and a long body (7). The process of inserting the fireproof member (30) in a bag in the state and the fireproof member in a bag (6H) in the through hole (6H) so that the non-combustible region (36) intersects the inner surface of the through hole (6H). 30) Including the step of pushing. [Selection diagram] FIG. 9

Description

The present invention relates to a gap closing method and a gap closing unit.

Generally, the internal space of a building is divided into a plurality of room spaces by partitions 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, post-treatment such as filling and closing the gap space between the through hole and the long body is required. For example, in order to prevent the spread of fire when a fire breaks out in a certain room space, it is necessary to take fire prevention measures in the gap space between the through hole and the long body.

For example, Japanese Patent Application Laid-Open No. 2005-73357 (Patent Document 1) describes a refractory member in a bag containing a bag body (bag 14) and a paste-like heat-expandable refractory material (paste-like refractory material 12) contained therein. A fire protection structure using a fire protection pad 10) is disclosed. The refractory member in the bag is wound around the long body on the opening side of the support member (reception metal fitting 22) installed in the through hole of the compartment, and then pushed into the through hole (support member). Then, the refractory member in the bag fills the gap space created between the inner surface of the through hole and the outer surface of the elongated body while being supported by the support member.

However, the support member of Patent Document 1 is formed by bending a wire. Therefore, when an actual fire occurs, when the bag body is melted by the generated heat and the paste-like heat-expandable refractory material flows out, the heat-expandable refractory material slips through the wire-like support member before it expands. There was a risk that it would run down as it was.

On the other hand, for example, as in Japanese Patent Application Laid-Open No. 2013-158382 (Patent Document 2), a backup material (thermoplastic member 19) is received by a support member (reception member 17), and a bag-filled fireproof material is passed through the backup material. It is also conceivable to support the member. However, there is a problem that a backup material must be separately inserted between the support member and the subsequent refractory member in a bag, which increases the work process. Further, the backup material of Patent Document 2 is composed of a thermoplastic resin foam or a rubber-like body, and is melted or burnt down by the heat at the time of a fire, so that the paste-like heat-expandable fire-resistant material always flows down. It is not always possible to sufficiently prevent this.

Japanese Unexamined Patent Publication No. 2005-73357 Japanese Unexamined Patent Publication No. 2013-158382

It is desired to improve the workability when applying fire protection measures to the gap space between the through hole and the long body, and to be able to appropriately apply such fire protection measures.

The gap closing method according to the present invention is
It is a gap closing method for closing a gap space between a through hole formed in a building compartment and a long body inserted through the through hole.
A bag-filled refractory member including a bag body and a paste-like heat-expandable refractory material contained in the bag body, and a support member capable of supporting the bag-filled fire-resistant member inside the through hole. Using a gap closing unit in which at least a part of the bag has a non-combustible area,
A step of inserting the bag-filled fire-resistant member into the gap space in a state where the non-combustible region is substantially parallel to the inner surface of the through hole, and arranging the bag-filled fire-resistant member so as to surround the periphery of the long body. When,
The through hole is arranged so that the bag-filled refractory member is arranged over the outer surface of the long body and the inner surface of the through hole, and the non-combustible region intersects the inner surface of the through hole. The process of pushing the refractory member in the bag inside
including.

According to this configuration, since the bag body constituting the bag-filled refractory member has a non-combustible region, the non-combustible region does not melt or burn out due to the heat at the time of the fire. Then, the non-combustible region has a posture of intersecting the inner surface of the through hole by arranging the refractory member in a bag so as to surround the circumference of the long body inside the through hole and then pushing the refractory member in the bag. Become. In this way, the non-combustible region that does not melt or burn out even in the event of a fire is arranged so as to intersect the inner surface of the through hole, so that the bag body melts and the paste-like heat-expandable refractory material flows out. However, it is received and supported by the non-combustible area, making it difficult for it to flow down. If the paste-like heat-expandable refractory material is heated and expanded while remaining on the non-combustible region, it will be received and supported by that part and the entire heat-expandable refractory material will expand inside the through hole. become. Therefore, it is possible to appropriately take fire protection measures in the gap space between the through hole and the long body.

At this time, when taking such fire protection measures, it is only necessary to insert only the support member and the fireproof member in the bag into the through hole of the compartment, and it is not necessary to insert a separate backup material. After insertion into the through hole, the incombustible region intersects the inner surface of the through hole in the process of pushing the refractory member in the bag so that it extends over the outer surface of the long body and the inner surface of the through hole. Therefore, the function of the backup material is replaced. Therefore, it is possible to improve the workability when applying fire protection measures to the gap space between the through hole and the long body.

Further, the gap closing unit according to the present invention is
A gap closing unit for closing a gap space between a through hole formed in a building compartment and a long body inserted through the through hole.
A bag-filled refractory member including a bag body and a paste-like heat-expandable refractory material contained in the bag body.
A support member capable of supporting the refractory member in a bag is provided.
At least a part of the bag has a non-combustible region.

By using the gap closing unit having such a configuration, as described above, it is possible to improve the workability when applying fire protection measures to the gap space between the through hole and the long body, and such a structure. Fire protection measures can be taken appropriately.

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 a metal thin film sheet constituting the non-combustible region is attached to the outer surface of the resin bag.

According to this configuration, a non-combustible region can be easily provided on at least a part of the bag body by simply attaching a metal thin film sheet to the outer surface of the bag body.

As one aspect
The support member can be inserted into the through hole along the longitudinal direction of the elongated body.
The support member and the refractory member in a bag are integrated at the insertion side end.
It is preferable that the non-combustible region is provided in the region including the insertion side end portion of the bag body.

According to this configuration, a refractory member in a bag that is soft and deformable by itself, together with a support member having a certain degree of rigidity, can be easily inserted from the insertion side end to which they are integrated to the depth of the through hole of the compartment. Can be inserted into. The non-combustible region is provided in the region including the insertion side end portion of the bag body, and is inserted to the inner side of the through hole. The posture can be such that it intersects the inner surface of the through hole. Therefore, the workability can be further improved.

As one aspect
A part of the non-combustible area is folded back in a mountain fold,
It is preferable that the refractory member in a bag is attached to the support member with the folded portion in the non-combustible region along the support member.

According to this configuration, a part of the non-combustible region (folded portion) is aligned with the support member, and the remaining portion is in a posture of intersecting the inner surface of the through hole, so that the posture can be easily stabilized and flows out. The paste-like heat-expandable refractory material can be more appropriately received and supported.

Further features and advantages of the 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 Perspective view of the gap closing unit Perspective view of sleeve member Front view of the integrated refractory member in a bag and the gap filling member Back view of the integrated refractory member in a bag and the gap filling member Cross-sectional view of the integrated refractory member in a bag and the gap filling member Cross-sectional view of the integrated sleeve member and the refractory member in a bag Perspective view showing one aspect of the construction procedure of the fire protection structure Cross-sectional 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 Perspective view of the gap closing unit of another aspect

An embodiment of the gap closing unit will be described with reference to the drawings. In this embodiment, an example in which the gap closing unit 1 is applied to a fire prevention measure structure for the purpose of preventing the spread of fire will be described. The gap closing unit 1 is used to close the gap space S between the through hole 6H formed in the building compartment 6 and the plurality of long bodies 7 inserted through the through hole 6H.

In the following description, the direction along the longitudinal direction L (direction in which the central axis extends) of the long body 7 inserted through the through hole 6H is referred to as "axial direction", and the direction orthogonal to the longitudinal direction L is referred to as "axial direction". It is called "diametrical direction", and the direction that orbits around the longitudinal direction L may be called "circumferential direction".

In the present embodiment, the compartment 6 to which the fire protection structure is applied is a fire-resistant and fire-proof structure that divides the space in the building into a plurality of room spaces. As shown in FIG. 1, the compartment 6 of the present embodiment is a floor (or ceiling) that vertically partitions a plurality of room spaces. The compartment 6 may be a solid wall such as a reinforced concrete structure (RC) or a lightweight cellular 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 (vertical 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. As such a long body 7, for example, pipes for an air conditioner can be exemplified. In the present embodiment, the long body 7 includes a piping member 71 for circulating a refrigerant and a drain pipe 72 for discharging drain water.

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 tube 71A is, for example, a metal tubular member, and the covering material 71B is, for example, a heat insulating material made of synthetic resin, which is exteriorized by the fluid tube 71A. The drain pipe 72 is, for example, a tubular member made of synthetic resin. In addition to these, for example, an electric cable or the like configured by providing an insulating coating material around the conductor wire may be included in the long body 7. In the present embodiment, the plurality of long bodies 7 are inserted into the through hole 6H in a bundle. The plurality of elongated bodies 7 in a bundle are densely arranged in the through hole 6H so that their outer surfaces are in contact with each other. A valley space V, which is a V-shaped recess, 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 long 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 mainly realized by using the fireproof member 30 in a bag arranged in the through hole 6H. More specifically, the fire protection structure is a gap closing unit 1 (with a sleeve member 20 inserted into the through hole 6H, a bag-filled fire resistance member 30 supported by the sleeve member 20, and a gap filling member 40. (See FIG. 2). In the present embodiment, the sleeve member 20 and the bag-filled fire-resistant member 30 are integrated, and further, the bag-filled fire-resistant member 30 and the gap filling member 40 are integrated, and all of them are integrated. In this embodiment, the sleeve member 20 corresponds to the "support member".

As shown in FIG. 3, the sleeve member 20 has a main body portion 21, a flange portion 23, and a support piece portion 25. The main body portion 21, the flange portion 23, and the support piece portion 25 are integrally formed using, for example, a resin material. These can be formed, for example, by injection molding. Further, the sleeve member 20 of the present embodiment further has a reinforcing metal fitting 28 that is separate from these. The reinforcing metal fitting 28 is formed by using, for example, a metal material. The reinforcing metal fitting 28 is detachably configured with respect to the main body portion 21, the flange portion 23, and the support piece portion 25.

The main body portion 21 is the main body portion of the sleeve member 20, and is inserted into the through hole 6H. The main body 21 is formed in a tubular shape (partially cylindrical in this example) having a shape corresponding to the shape of the through hole 6H. The main body 21 of the present embodiment lacks a part in the circumferential direction (a range in which the central angle is about 120 °), and the main body 21 is formed in a C-shaped cylinder as a whole.

The main body portion 21 of the present embodiment includes a circumferential extending portion 21A extending along the circumferential direction and an axial extending portion 21B extending along the axial direction. The main body portion 21 is formed so as to have a penetrating portion (lightening portion) 22 penetrating in the thickness direction thereof. The main body portion 21 is integrated with the flange portion 23 at the upper end portion thereof, and is integrated with the plurality of support piece portions 25 at the lower end portion.

The flange portion 23 is directly attached to the surface of the compartment 6 (peripheral portion of the through hole 6H). The flange portion 23 is formed in a plate shape protruding outward (diametrically outward) from the upper end portion of the main body portion 21. The flange portion 23 is provided with a protrusion 23P that projects upward. Further, the flange portion 23 is formed with a fixing hole portion 24 through which a fixing member such as a screw is inserted. The fixing member inserted through the fixing hole 24 can be screwed into the compartment 6 to attach the sleeve member 20 to the compartment 6 (see FIG. 1).

The support piece portion 25 is formed as a thin plate-shaped plate piece portion that projects inward (inward in the radial direction) from the lower end portion of the main body portion 21. The support piece portion 25 is formed in a trapezoidal shape having a predetermined circumferential width and a predetermined radial width. The support piece portion 25 receives and supports the refractory member 30 in a bag by its upper surface (see FIG. 9). When the through hole 6H is formed through the horizontally extending partition body 6 in the vertical direction as in the present embodiment, the support piece portion 25 receives and supports the bag-filled refractory member 30 from below. In the present embodiment, a plurality of support piece portions 25 are provided so as to be dispersed in the circumferential direction. On the upper surface of a part of the support piece portion 25, a locking protrusion 25A along the outer shape of the lower bent piece 28C of the reinforcing metal fitting 28 is formed so as to project.

A plurality of fixing pieces 26 are formed inward (inward in the radial direction) in the lower circumferential extending portion 21A of the main body portion 21. The fixed piece 26 is configured to be able to change its posture to a bent posture, and is locked to a locking claw portion separately projected from the circumferential extending portion 21A in the bent posture. In the present embodiment, the main body 21 and the refractory member 30 in a bag are detachably integrated by the fixing piece 26. The main body 21 and the refractory member 30 in the bag are integrated by engaging the plurality of fixing pieces 26 with the locking claws while being inserted into the insertion holes 33 of the corresponding refractory member 30 in the bag. Will be done.

The reinforcing metal fitting 28 is attached so as to extend along the flange portion 23, the main body portion 21, and the support piece portion 25. The reinforcing metal fitting 28 is formed in a crank shape by bending a strip-shaped metal thin plate having the same width (circumferential width) as the axial extending portion 21B of the main body portion 21 at two points. The reinforcing metal fitting 28 has a metal fitting main body 28A, an upper bending piece 28B, and a lower bending piece 28C, which are divided by the two bending portions as boundaries. The metal fitting body 28A extends along the main body 21, the upper bent piece 28B extends along the flange 23, and the lower bent piece 28C extends along the support piece 25. A through hole 28h is formed in the upper bent piece 28B. In the reinforcing metal fitting 28, the protrusion 23P provided on the flange portion 23 inserts the through hole 28h formed in the upper bending piece 28B, and the lower bending piece 28C is inserted in the locking protrusion 25A formed in the support piece portion 25. It is attached to the main body 21 in an engaged state.

The sleeve member 20 can be inserted into the through hole 6H from the insertion side end Ef along the longitudinal direction L of the elongated body 7 while supporting the bagged refractory member 30 integrated with the sleeve member 20. It has become. In the present embodiment, the insertion side end Ef is the end on the side where the sleeve member 20 and the bag-filled refractory member 30 are integrated in the axial direction. At the end opposite to the insertion side end Ef in the axial direction, the sleeve member 20 and the bag-filled refractory member 30 are not integrated, and in this embodiment, this is referred to as "open side end Er". ..

As shown in FIGS. 4 to 6, the bagged refractory member 30 includes a bag body 31 and a paste-like first heat-expandable refractory material 35 contained in the bag body 31. Further, the refractory member 30 in a bag includes a metal thin film sheet 37 provided on the outer surface of the bag 31 and a second heat-expandable refractory material 38.

The bag body 31 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 31 is formed by folding one film material in half or stacking two film materials on top of each other. The outer edge of the bag 31 is, for example, a sealing portion 32 formed by heat fusion. The sealing portion 32 is formed in a frame shape. In the sealing portion 32, the bag body 31 is in close contact with each other without sandwiching the first heat-expandable refractory material 35. A plurality of insertion holes 33 are formed at predetermined intervals on one side (specifically, one of the long sides) of the frame-shaped sealing portion 32. Further, of the frame-shaped sealing portion 32, one side on which the insertion hole 33 is formed is a folded portion 34 that is folded back with respect to another portion of the bag 31 (see FIG. 7).

The first heat-expandable refractory material 35 is a member having heat-expandability (property that the volume increases by heating) and fire resistance (property that easily withstands heat and properties that have a high melting temperature and are hard to burn). As the first heat-expandable refractory material 35, 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 first heat-expandable refractory material 35 of the present embodiment has a higher content of a plasticizer (water in the case of water-based material, oil in the case of oil-based material) than usual, and is in the form of a paste as a whole. The first heat-expandable refractory material 35 expands in the thickness direction when heated to, for example, 200 ° C. or higher. The coefficient of thermal expansion of the refractory member 30 in a bag containing the first heat-expandable refractory material 35 may be, for example, 2 to 40 times.

A metal thin film sheet 37 is attached to one surface of the bag 31. The metal thin film sheet 37 can be made of, for example, a thin film aluminum sheet having a thickness of 20 μm to 300 μm, such as an aluminum glass cloth or an aluminum warif. By attaching such a metal thin film sheet 37 to the bag 31, nonflammability can be imparted to the region. In the present embodiment, the non-combustible region 36 is formed by the metal thin film sheet 37 attached to the bag 31. Thus, at least a part of the bag 31 has a non-combustible region 36. The metal thin film sheet 37 (non-combustible region 36) is provided in a region of the bag 31 including the insertion side end Ef.

The length of the metal thin film sheet 37 (non-combustible region 36) along the longitudinal direction L of the long body 7 is not particularly limited, but may be, for example, 1/5 or more and 3/5 or less of the length of the bag body 31. can. As will be described later, the non-combustible region 36 has a role of supporting the bag body 31 and the first heat-expandable refractory material 35 inside thereof from below, and receiving and supporting the paste-like first heat-expandable refractory material 35 flowing out in the event of a fire. Fulfill. In view of such a role, the length of the metal thin film sheet 37 (non-combustible region 36) is 1/5 of the length of the bag 31 so that the first heat-expandable refractory material 35 can be sufficiently received and supported. The above is preferable. On the other hand, since the excessive non-combustible region 36 leads to an increase in cost and may adversely affect workability, the length of the metal thin film sheet 37 (non-combustible region 36) is 3/5 or less of the length of the bag 31. Is preferable. The length of the metal thin film sheet 37 (non-combustible region 36) is more preferably 1/3 or more and 1/2 or less of the length of the bag 31. The insertion hole 33 is formed so as to penetrate both the bag body 31 and the metal thin film sheet 37.

As described above, one side of the frame-shaped sealing portion 32 on which the insertion hole 33 is formed is a folded portion 34 that is folded back with respect to the other portion of the bag body 31, and is a metal thin film sheet 37. (Non-combustible region 36) is provided in the region including the folded-back portion 34. Then, as shown in FIG. 7, the refractory member 30 in the bag is attached to the sleeve member 20 with the folded portion 34 in the non-combustible region 36 along the sleeve member 20.

In the present embodiment, a sheet-shaped second heat-expandable refractory material 38 is provided on the other side surface of the bag 31 (the surface opposite to the side on which the metal thin film sheet 37 is attached). There is. The second heat-expandable refractory material 38 is also a member having heat-expandability and fire resistance. The second heat-expandable refractory material 38 is harder and less likely to be deformed than the first heat-expandable refractory material 35. The second heat-expandable refractory material 38 is composed of, for example, a resin composition containing a heat-expandable base material, an inorganic filler, and a resin component. Examples of the heat-expandable substrate include heat-expandable graphite, alkali metal silicate, and uncalcined vermiculite powder. Examples of the inorganic filler include various inorganic fillers. The second heat-expandable refractory material 38 of the present embodiment has adhesiveness (self-adhesiveness). Examples of the resin component for forming such an adhesive second heat-expandable refractory material 38 include an adhesive elastomer containing butyl rubber as a main component. A non-adhesive coating sheet is provided on the surface of the second heat-expandable refractory material 38 (the surface opposite to the bag 31).

The second heat-expandable refractory material 38 is configured to have a uniform thickness. The thickness of the second heat-expandable refractory material 38 may be, for example, 1.5 mm to 10 mm. The second heat-expandable refractory material 38 expands in the thickness direction when heated to, for example, 200 ° C. or higher. The expansion coefficient of the second heat-expandable refractory material 38 may be, for example, 5 to 40 times.

As shown in FIGS. 2 and 4 to 7, the gap filling member 40 includes a cushion material 41 and a shape-retaining member 42 integrated with the cushion material 41.

The cushion material 41 has flexibility and can be deformed by following the outer surface shape of the plurality of long bodies 7. The cushion material 41 can be made of a foamed resin such as soft urethane foam or polyethylene foam. Further, the cushion material 41 can also be made of inorganic fibers such as ceramic wool, glass wool, and rock wool. When a plurality of long bodies 7 are bundled and inserted into the through hole 6H as in the present embodiment, a V-shaped valley space V is formed between the adjacent long bodies 7. The cushion material 41 is deformed following the outer surface shape of the plurality of long bodies 7, so that the valley space V can be filled.

The length of the cushion material 41 along the longitudinal direction L of the long body 7 is not particularly limited, but is preferably 1/20 or more and 1/2 or less of the length of the bag body 31. In view of the role of the cushion material 41, the length of the cushion material 41 is preferably 1/20 or more of the length of the bag body 31 so that the valley space V can be sufficiently filled. On the other hand, since the excessive cushion material 41 leads to an increase in cost and may adversely affect workability, the length of the cushion material 41 is preferably ½ or less of the length of the bag body 31. The length of the cushion material 41 is more preferably 1/10 or more and 1/4 or less of the length of the bag body 31.

From the same viewpoint, the thickness of the cushion material 41 is preferably 1 mm or more and 10 mm or less. The thickness of the cushion material 41 is more preferably 1.5 mm or more and 6 mm or less.

The shape-retaining member 42 is integrated with the cushion material 41 attached to the shape-retaining member 42, and serves to hold the shape of the cushion material 41 in a predetermined shape. The shape-retaining member 42 can be made of an aluminum sheet such as an aluminum glass cloth having a thickness of, for example, 20 μm to 300 μm. As described above, the cushion material 41 is deformed following the outer surface shape of the plurality of long bodies 7 to fill the valley space V. Therefore, the shape-retaining member 42 retains the shape of the cushion material 41 that follows the outer surface shape of the plurality of long bodies 7, whereby the cushion material 41 fills the valley space V for a long period of time. It can be maintained over.

In the present embodiment, the sheet-shaped shape-retaining member 42 is fixed to the bag 31 in a state of protruding from one end of the bag 31. The shape-retaining member 42 protrudes from the end (open side end Er) on the side opposite to the side where the metal thin film sheet 37 (non-combustible region 36) and the second heat-expandable refractory material 38 are provided in the bag 31. In this state, it is attached to and fixed to the sealing portion 32. Then, the cushion material 41 is attached and fixed to one side of the portion of the shape-retaining member 42 that protrudes from the bag body 31. In the present embodiment, the cushion material 41 is attached to the surface of the shape-retaining member 42 on the same side as the bag body 31. Such a fixing structure can be easily realized by forming the shape-retaining member 42 with, for example, an aluminum glass cloth tape having an adhesive layer.

In this way, in the present embodiment, the refractory member 30 in the bag and the gap filling member 40 are integrated. The refractory member 30 in a bag and the gap filling member 40 are inseparably integrated by a shape-retaining member 42 having an adhesive layer. As described above, in the present embodiment, the sleeve member 20 and the refractory member 30 in a bag are detachably integrated, and the sleeve member 20, the refractory member 30 in a bag, and the gap filling member 40 are integrated as a whole. ing. The sleeve member 20 and the bag-filled fire-resistant member 30 are integrated at the insertion side end Ef, and the bag-filled fire-resistant member 30 and the gap filling member 40 are integrated at the open side end Er on the opposite side. ing.

In this embodiment, as shown in FIGS. 4 and 5, the lengths of the bag-filled refractory member 30 and the gap filling member 40 are set to be equal in the circumferential direction. Further, as shown in FIGS. 2 and 8, the bag-filled refractory member 30 and the gap filling member 40 are set to have a longer circumferential length than the sleeve member 20. The bag-filled refractory member 30 and the gap filling member 40 are integrated with the sleeve member 20 so that one end in the circumferential direction is substantially aligned, and the other end in the circumferential direction can swing without being restrained by the sleeve member 20. ing.

Hereinafter, the construction procedure of the fire protection structure realized by using the gap closing unit 1 of the present embodiment will be described. First, as shown in FIG. 8, 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 partition body 6 of the building. The gap closing unit 1 is arranged so as to surround the circumference of the body 7. At this time, the free end in the circumferential direction of the bag-filled refractory member 30 and the gap filling member 40 is opened to expose the frontage of the sleeve member 20, and in this state, the gap closing unit 1 is slid in the radial direction of the elongated body 7. And arrange it around the bundle of the long body 7. After that, the free ends of the refractory member 30 in the bag and the gap filling member 40 are closed to form a cylinder.

At this stage, the bag-filled refractory member 30 runs substantially parallel to the inner surface of the through hole 6H and the main body 21 of the sleeve member 20. The non-combustible region 36 of the refractory member 30 in the bag is integrated with the sleeve member 20 at the folded-back portion 34, and the remaining portion of the non-combustible region 36 is located radially inside (on the long body 7 side) (FIG. 7). Further, the cushion material 41 is arranged on the long body 7 side with respect to the shape-retaining member 42. Note that FIG. 7 is a cross-sectional view at a position where the fixing piece 26 of the sleeve member 20 is provided.

In this state, the gap closing unit 1 is slid and moved in the longitudinal direction L of the long body 7 and inserted into the gap space S. At this time, the gap closing unit 1 is slid and moved from the insertion side end portion Ef until the flange portion 23 of the sleeve member 20 abuts on the surface of the through hole 6H, and is inserted into the gap space S. At that time, as shown in the upper part of FIG. 9, the bag-filled refractory member 30 is maintained in a state of being substantially parallel to the inner surface of the through hole 6H and the main body portion 21 of the sleeve member 20, and the noncombustible region 36 is also maintained. It is maintained in a state of being substantially parallel to the inner surface of the through hole 6H and the main body portion 21. As a result, in the gap space S, the refractory member 30 in the bag is arranged so as to surround the circumference of the long body 7. Note that FIG. 9 is a cross-sectional view at a position where the reinforcing metal fitting 28 of the sleeve member 20 is provided.

In this state, as shown in the lower part of FIG. 9, the refractory member 30 in a bag is pushed in so that the refractory member 30 in a bag is arranged over the outer surface of the elongated body 7 and the inner surface of the through hole 6H. .. At this time, the second heat-expandable refractory material 38, which has a relatively high shape-retaining property, keeps the posture along the inner surface of the main body 21 of the sleeve member 20, and the soft paste-like first heat-expandable refractory material 35 is packed in the bag. It is deformed together with 31 so as to surround the elongated body 7 in an annular shape. By this pushing operation, the non-combustible region 36 that has been substantially parallel to the inner surface of the through hole 6H and the main body portion 21 of the sleeve member 20 has been moved with respect to the inner surface of the through hole 6H and the main body portion 21 of the sleeve member 20. It will be in a crossing posture. Specifically, the non-combustible region 36 is abutted and supported from below by the support piece portion 25 of the sleeve member 20, and is in a posture substantially orthogonal to the inner surface of the through hole 6H and the main body portion 21 of the sleeve member 20. Further, the non-combustible region 36 has a posture substantially orthogonal to the outer surface of the long body 7.

The non-combustible region 36 orthogonal to the outer surface of the elongated body 7 and the inner surface of the through hole 6H is continuously provided in the circumferential direction, and is supported from below by the support piece portion 25 of the sleeve member 20 at a plurality of locations in the circumferential direction. Then, the non-combustible region 36 supports the bag 31 and the paste-like first heat-expandable refractory material 35 contained therein from below while being supported from below by the support piece portion 25.

Finally, as shown in FIG. 10, the bag is filled with the valley space V between the adjacent long bodies 7 by the gap filling member 40 integrated with the open side end Er of the refractory member 30 in the bag. The body 31 and the first heat-expandable refractory material 35 are covered from above. Since the gap filling member 40 has a cushioning material 41 having flexibility and can be deformed following the outer surface shape of the plurality of long bodies 7, the valley space V can be appropriately filled. Further, since the cushion material 41 is integrated with the shape-retaining member 42, the shape of the cushion material 41 can be maintained, and the state in which the cushion material 41 fills the valley space V is maintained for a long period of time. Can be made to.

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. It may expand further. Even in this case, the first thermally expandable refractory material 35 contained in the refractory member 30 in a bag thermally expands in response to an increase in the ambient temperature, and fills the space created by melting and burning of the covering material 71B ( In other words, the increase in the clearance volume can be compensated for). Therefore, fire protection can be imparted to the portion of the through hole 6H.

In particular, in the present embodiment, the first heat-expandable refractory material 35 is in the form of a paste, and the bag 31 is melted by the heat of the flame and the first heat-expandable refractory material 35 flows out, unless special measures are taken. It may run off before it expands thermally. In this respect, in the present embodiment, the non-combustible region 36, which is not melted or burned down by the heat at the time of a fire, supports the paste-like first heat-expandable refractory material 35 from below over the entire circumference. Therefore, the first heat-expandable refractory material 35 is less likely to flow down. Therefore, most of the first heat-expandable refractory material 35 can be appropriately thermally expanded inside the through hole 6H, and sufficient fire protection performance can be imparted to the portion of the through hole 6H. There is no need to provide a separate backup material for the same purpose, and it is excellent in workability.

[Other embodiments]
(1) In the above embodiment, the configuration in which the refractory member 30 in a bag is attached to the sleeve member 20 at the folded portion 34 by folding a part of the bag body 31 into a mountain fold has been described as an example. However, without being limited to such a configuration, the refractory member 30 in a bag may be attached to the sleeve member 20 without being folded back and remaining flat as a whole.

(2) In the above embodiment, a configuration in which the sleeve member 20, the refractory member 30 in a bag, and the gap filling member 40 are integrated has been described as an example. However, without being limited to such a configuration, for example, as shown in FIG. 11, only the sleeve member 20 and the bag-filled refractory member 30 may be integrated, and the gap filling member 40 may be a separate body. Alternatively, only the refractory member 30 in the bag and the gap filling member 40 may be integrated, and the sleeve member 20 may be separated. Further, the sleeve member 20, the refractory member 30 in a bag, and the gap filling member 40 may all be separate bodies.

(3) In the above embodiment, the sheet-shaped shape-retaining member 42 is fixed to the bag 31 in a state of protruding from one end of the bag 31, and the cushion material 41 is attached to one side of the protruding portion. Was explained as an example. However, the present invention is not limited to such a configuration, and for example, the cushion material 41 and the shape-retaining member 42 are provided separately on both sides of the bag 31 with the sealing portion 32 of the open side end Er. Is also good.

(4) In the above embodiment, a configuration in which the non-combustible region 36 is provided on the bag 31 by attaching the metal thin film sheet 37 has been described as an example. However, the non-combustible region 36 may be directly provided on the bag 31 by various methods such as sputtering, vapor deposition plating, electrolytic plating, and electroless plating without being limited to such a configuration.

(5) The specific configuration of the sleeve member 20 for supporting the bag-filled refractory member 30 in the through hole 6H described in the above embodiment is arbitrary. For example, the main body portion 21 may be formed in a cylindrical shape as a whole, and may be arranged so that both ends in the circumferential direction are close to each other. Further, the main body portion 21 does not necessarily have to have the penetrating portion 22. Further, the flange portion 23 may be provided intermittently in the circumferential direction instead of being continuously provided over the entire circumference. Further, the sleeve member 20 does not necessarily have to be provided with the reinforcing metal fitting 28. Alternatively, instead of the resin sleeve member 20, a member obtained by bending a wire into a predetermined shape may be used to support the refractory member 30 in a bag.

(6) In the above embodiment, the present invention is used as a fire prevention measure at a portion where the long body 7 is vertically inserted into the through hole 6H formed in the floor (or ceiling) that vertically divides a plurality of room spaces. An example to which the invention is applied has been described. However, without being limited to such a configuration, for example, fire prevention measures are taken at a portion where the elongated body 7 is horizontally inserted into the through hole 6H formed in the wall portion that horizontally divides a plurality of room spaces. Also, the present invention can be applied.

(7) The configurations disclosed in each of the above-described embodiments (including the above-described embodiment and other embodiments; the same shall apply hereinafter) are applied in combination with the configurations disclosed in 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 exemplary in all respects, and can be appropriately modified without departing from the spirit of the present disclosure.

1 Gap closing unit 6 Partition 6H Through hole 7 Long body 20 Sleeve member (support member)
30 Refractory member in a bag 31 Bag body 35 First heat-expandable refractory material (paste-like heat-expandable refractory material)
36 Non-combustible area 37 Metal thin film sheet 40 Gap filling member 41 Cushion material 42 Shape-retaining member Ef Insertion side end S Gap space V Valley space L Longitudinal direction

Claims (5)

It is a gap closing method for closing a gap space between a through hole formed in a building compartment and a long body inserted through the through hole.
A bag-filled refractory member including a bag body and a paste-like heat-expandable refractory material contained in the bag body, and a support member capable of supporting the bag-filled fire-resistant member inside the through hole. Using a gap closing unit in which at least a part of the bag has a non-combustible area,
A step of inserting the bag-filled fire-resistant member into the gap space in a state where the non-combustible region is substantially parallel to the inner surface of the through hole, and arranging the bag-filled fire-resistant member so as to surround the periphery of the long body. When,
The through hole is arranged so that the bag-filled refractory member is arranged over the outer surface of the long body and the inner surface of the through hole, and the non-combustible region intersects the inner surface of the through hole. The process of pushing the refractory member in the bag inside
Gap closure method including. A gap closing unit for closing a gap space between a through hole formed in a building compartment and a long body inserted through the through hole.
A bag-filled refractory member including a bag body and a paste-like heat-expandable refractory material contained in the bag body.
A support member capable of supporting the refractory member in a bag is provided.
A gap closing unit in which at least a part of the bag body has a non-combustible region. The gap closing unit according to claim 2, wherein a metal thin film sheet constituting the non-combustible region is attached to the outer surface of the resin bag body. The support member can be inserted into the through hole along the longitudinal direction of the elongated body.
The support member and the refractory member in a bag are integrated at the insertion side end.
The gap closing unit according to claim 2 or 3, wherein the non-combustible region is provided in a region including an insertion side end portion of the bag body. A part of the non-combustible area is folded back in a mountain fold,
The gap closing unit according to claim 4, wherein the refractory member in a bag is attached to the support member in a state where the folded portion in the non-combustible region is along the support member.

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