Method of closing penetration, device for closing penetration, and compression member

Abstract

To provide a blocking method of a penetration part, a blocking member device of the penetration part, and a compression member, capable of blocking the penetration part without a clearance by expanding the compression member.SOLUTION: A method for closing a through part Wa includes a step of preparing a compression member 41 in which a plate-like body 42 is housed inside a sealed bag 43 and the thickness of the body 42 compressed by degassing the inside of the sealed bag 43 is made thinner than that before degassing, and a thermally expandable fire-resistant member 31 having thermal expansion performance and formed to have a thickness larger than that of the compression member 41. The blocking method of the penetration part Wa has a process for arranging the thermally expansive fire-resistant member 31 and the compression member 41 in the void, and a process for exposing the body 42 of the compression member 41 to the atmosphere, expanding the body 42 by restoring force for restoring the body 42 before being compressed, and blocking the void by the expanded body 42 and the thermally expansive fire-resistant member 31.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for closing a penetration, a closing member device for a penetration, and a compression member. [Background technology]

[0002] Passing members such as wiring and piping materials pass through penetrations that penetrate building walls in the thickness direction. A fire-resistant material is placed in the gap between the inner surface of the penetration and the outer surface of the passing member that passes through the penetration, and the penetration is closed.

[0003] The penetration is closed using a fire prevention device for an opening disclosed in Patent Document 1, for example. The fire prevention device for an opening disclosed in Patent Document 1 is disposed at an opening between a penetration of a partition body and a penetrator inserted through the penetration. The fire prevention device for an opening is formed by sealing a heat-expandable fire-resistant material in a flexible airtight bag. The heat-expandable fire-resistant material, which is a compression member, is constrained in a volumetrically reduced state by degassing the flexible airtight bag. Furthermore, the heat-expandable fire-resistant material can restore its compressed volume by releasing the seal of the flexible airtight bag.

[0004] When closing an opening using fire prevention devices for openings, first, insert and place multiple fire prevention devices for openings into the opening. Next, release the seals of all the fire prevention devices for openings to restore all the heat-expandable fire-resistant materials. Then, the opening is closed by the restored heat-expandable fire-resistant materials. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-75515 Summary of the Invention [Problem to be solved by the invention]

[0006] The fire prevention device for openings disclosed in Patent Document 1 has a reduced volume of heat-expandable fire-resistant material. Therefore, the number of fire prevention devices for openings to be deployed at an opening must be estimated taking into account the volume expansion that occurs as the heat-expandable fire-resistant material restores its shape. When the estimated number of fire prevention devices for openings are deployed at an opening and all of the heat-expandable fire-resistant material expands, there are cases where the opening cannot be closed and gaps are formed. [Means for solving the problem]

[0007] A method of closing a penetration part to solve the above problems includes the steps of: preparing a compression member in which a plate-shaped main body is contained inside a sealed bag, and in which the thickness of the main body, compressed by degassing the inside of the sealed bag, is thinner than before degassing; and a heat-expandable fire-resistant member that has thermal expansion properties and is formed to be thicker than the thickness of the compression member; arranging the heat-expandable fire-resistant member and the compression member in the gap between the inner surface of a penetration part that penetrates a building wall in the wall thickness direction and the outer surface of a passing member that passes through the penetration part; exposing the main body of the compression member to the atmosphere, causing the main body to expand due to a restoring force that attempts to restore the main body before it is compressed, and closing the gap with the expanded main body and the heat-expandable fire-resistant member.

[0008] In the method for closing a penetration, the step of placing the heat-expandable fire-resistant member and the compression member in the gap may include placing the compression member in any of the gaps between the heat-expandable fire-resistant member already placed in the gap and the inner surface of the penetration, the gap between the heat-expandable fire-resistant member already placed in the gap and the outer surface of the passing member, and the gap between the heat-expandable fire-resistant member already placed in the gap and another heat-expandable fire-resistant member placed in the gap together.

[0009] In a method for closing a penetration portion, the direction in which the heat-expandable fire-resistant member has a greater thickness than the compression member is defined as a first direction, and the process of arranging the heat-expandable fire-resistant member and the compression member in the gap may involve arranging the heat-expandable fire-resistant member in the gap with one of its end faces in the first direction facing the inner surface of the penetration portion and the other facing the outer surface of the passing member, and compressing and deforming the heat-expandable fire-resistant member to reduce its thickness in the first direction, and arranging the compression member in the gap with the gap larger than the thickness of the compression member.

[0010] In the method for closing a penetration portion, the compression member disposed in the gap may be pressed by a restoring force of the compressed heat-expandable fire-resistant member. In the method for closing a penetration, the step of placing the heat-expandable fire-resistant member and the compression member in the gap may involve forming a gap that is smaller than the thickness of the heat-expandable fire-resistant member and larger than the thickness of the compression member, and then placing the compression member in the gap.

[0011] In the method for blocking a penetration portion, the step of placing the heat-expandable fire-resistant member and the compression member in the gap may include a step of stacking a plurality of the heat-expandable fire-resistant members in a stacking direction in which the facing direction between the inner surface of the penetration portion and the outer surface of the passing member is the stacking direction.

[0012] In the method for closing a penetration, the step of placing the heat-expandable fire-resistant member and the compression member in the gap may include a step of placing the compression member between multiple heat-expandable fire-resistant members stacked in the thickness direction of the heat-expandable fire-resistant member.

[0013] In the method for closing a penetration portion, the heat-expandable fire-resistant member is strip-shaped and flexible, with a thickness extending in the longitudinal direction that is greater than the thickness of the compression member, and the step of placing the heat-expandable fire-resistant member and the compression member in the gap may include the steps of: winding the heat-expandable fire-resistant member around a passing member with one thickness-wise surface of the heat-expandable fire-resistant member facing the passing member and placing it in the gap; and placing the compression member in the gap between the other thickness-wise surface of the heat-expandable fire-resistant member and the inner surface of the penetration portion, or in the gap between the other thickness-wise surface of the heat-expandable fire-resistant member and another heat-expandable fire-resistant member wound around another passing member.

[0014] In the method for closing a penetration portion, the penetration portion may be rectangular when viewed in the wall thickness direction, and the step of arranging the heat-expandable fire-resistant member and the compression member in the gap may include a step of stacking the heat-expandable fire-resistant members from one of the opposing inner surfaces of the penetration portion toward the other inner surface, and then abutting the compression member against the other inner surface and against the heat-expandable fire-resistant member adjacent to the other inner surface in the stacking direction of the heat-expandable fire-resistant members, so that the compression member is pressed against the heat-expandable fire-resistant member and is sandwiched between the other inner surface of the penetration portion.

[0015] In the method for closing a penetration, the heat-expandable fire-resistant member is contained inside a sealed bag and is contained in a compressed state by degassing the inside of the sealed bag, and the heat-expandable fire-resistant member is preferably released from the degassed state before being placed inside the penetration and allowed to recover to a thickness at least greater than that of the degassed state.

[0016] The blocking member device for a penetration portion to solve the above problems comprises a heat-expandable fire-resistant member and a compression member that are placed in the gap between the inner surface of a penetration portion that penetrates a building wall in the wall thickness direction and the outer surface of a passing member that passes through the penetration portion, wherein the heat-expandable fire-resistant member has thermal expansion performance, and the compression member has a plate-shaped main body that is contained inside a sealed bag, and the thickness of the main body compressed by degassing the inside of the sealed bag is thinner than the thickness of the heat-expandable fire-resistant member.

[0017] In the blocking member device for the penetration portion, the outer surface of the compression member is formed by the sealed bag, and the sliding resistance of the outer surface of the compression member against the outer surface of the heat-expandable fire-resistant member is preferably smaller than the sliding resistance between the heat-expandable fire-resistant members.

[0018] The compression member for solving the above problems has a plate-shaped main body contained inside a sealed bag, and the main body is compressed by degassing the inside of the sealed bag. The main body has irregularities on at least one side in the thickness direction or slits cut in the thickness direction from one side, and the presence or absence of the irregularities or slits can be seen from outside the sealed bag. [Effects of the Invention]

[0019] According to the present invention, the compression member can be expanded to close the penetration portion without any gaps. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a front view showing a penetration part of the first embodiment. [Figure 2] FIG. 2 is a perspective view showing the support rack, the passing member, and the through portion. [Figure 3] FIG. 3 is a perspective view showing a thermally expandable fire-resistant member. [Figure 4] FIG. 4 is a perspective view showing a compression member. [Figure 5] FIG. 5 is an exploded perspective view showing the compression member. [Figure 6] FIG. 6 is a front view showing a state in which the thermally expandable fire-resistant members are stacked. [Figure 7] FIG. 7 is a partial front view showing a state in which the gap is expanded in the vertical direction. [Figure 8] FIG. 8 is a partial front view showing a state in which a compression member is disposed in the gap. [Figure 9] FIG. 9 is a partial front view showing a state in which a compression member is disposed in the gap. [Figure 10] FIG. 10 is an exploded perspective view showing a blocking member device for a penetration portion according to the second embodiment. [Figure 11] FIG. 11 is a front view of a state in which a compression member and a thermally expandable fire-resistant member are disposed in the penetration portion. [Figure 12] FIG. 12 is a front view showing a state in which the gap is closed by the compression member. [Figure 13] FIG. 13 is a diagram illustrating another example of a method for closing a penetration portion. [Figure 14] FIG. 14 is a diagram illustrating another example of a method for closing a penetration portion. DETAILED DESCRIPTION OF THE INVENTION

[0021] (First embodiment) Hereinafter, an embodiment embodying a method for closing a penetration portion, a closing member device for a penetration portion, and a compression member will be described.

[0022] <Building wall> 1 and 2, the building wall W has a first partition wall 11 and a second partition wall 12 erected so as to sandwich a lightweight steel material (not shown). The first partition wall 11 and the second partition wall 12 are made of, for example, gypsum board.

[0023] <Penetration section> A rectangular penetration Wa is provided in the building wall W when viewed in the wall thickness direction. The penetration Wa penetrates the building wall W in the wall thickness direction. The penetration Wa is defined by an upper wall surface W1 and a lower wall surface W2 that face each other in the vertical direction, and a left wall surface W3 and a right wall surface W4 that face each other in the horizontal direction. The upper wall surface W1, the lower wall surface W2, the left wall surface W3, and the right wall surface W4 are the inner surfaces of the penetration Wa.

[0024] A plurality of passing members 13 pass through the penetration part Wa. The passing member 13 is a general term for wiring (control cables, coaxial cables, optical cables, etc.) and piping materials (flexible electrical conduits made of synthetic resin, steel electrical conduits, etc.) that are laid inside the building. The passing member 13 consists of a piping material 13a and an optical cable 13b inserted into the piping material 13a.

[0025] The passing member 13 is supported from below by a support rack 14. The support rack 14 is long and ladder-shaped. The support rack 14 has a pair of long members 14a facing each other and a plurality of support members 14b spanning the opposing faces of the pair of long members 14a. The support rack 14 is disposed in the penetration portion Wa with the pair of long members 14a facing each other in the left-right direction. The support members 14b are not disposed within the penetration portion Wa, but are disposed outside both sides of the building wall W in the wall thickness direction. The passing member 13 is supported by the plurality of support members 14b.

[0026] <Penetration section closure structure> The closing structure of the penetration part Wa has a heat-expandable fire-resistant member 31 and a compression member 41 housed in the gap K between the inner surface of the penetration part Wa and the outer surface of the passage member 13 .

[0027] <Thermal expansion fire-resistant material> As shown in FIG. 3 , the thermally expandable fireproof member 31 includes a fireproof material 32 and a sheet material 33 attached to the fireproof material 32. The fireproof material 32 is a rectangular plate. Of the six faces of the fireproof material 32, one of the two largest rectangular faces is designated as a first end face 32a, and the remaining face is designated as a second end face 32b. The direction in which a straight line connecting the first end face 32a and the second end face 32b extends is a first direction Z of the fireproof material 32. The first direction Z is also the thickness direction of the fireproof material 32. Therefore, the first end face 32a and the second end face 32b are end faces located at both ends of the fireproof material 32 in the thickness direction.

[0028] The direction in which the long sides of the first end face 32a and the second end face 32b extend is the second direction X of the heat-expandable fire-resistant member 31, and the direction in which the short sides of the first end face 32a and the second end face 32b extend is the third direction Y of the heat-expandable fire-resistant member 31. Of the six faces of the fire-resistant material 32, the face connecting the first end face 32a and the second end face 32b is the side face 32c.

[0029] The fire-resistant material 32 is made of a foam having thermal expansion properties. Specifically, the fire-resistant material 32 is made of a foam in which a thermally expandable material is uniformly dispersed in a matrix. Such a fire-resistant material 32 is obtained by foaming only the foaming agent in a matrix material in which a thermally expandable material and a foaming agent are kneaded into the matrix. In this embodiment, expandable graphite is used as the thermally expandable material, and a polymer is used as the matrix, more specifically, synthetic rubber. Chloroprene rubber is used as the synthetic rubber. In addition to chloroprene rubber, other synthetic rubbers include ethylene propylene diene rubber (EPDM), natural rubber (NR), synthetic natural rubber (IR), isoprene rubber, butadiene rubber (BR), styrene butadiene rubber (SBR), butyl rubber (IIR), and nitrile rubber (NBR).

[0030] The foaming agent has an expansion start temperature of 130 to 200°C, and the expanded graphite has an expansion start temperature of 120 to 300°C. In this embodiment, a foaming agent having a lower expansion start temperature than the thermally expandable material (expanded graphite) is used. For example, when expanded graphite with an expansion start temperature of 250°C is used, a foaming agent with an expansion start temperature of 160°C is used.

[0031] The fire-resistant material 32 is sponge-like and has many fine bubbles formed by foaming of a foaming agent. Many bubbles are present inside and on the surface of the fire-resistant material 32. The foamed chloroprene rubber also allows the fire-resistant material 32 to be compressively deformed. The fire-resistant material 32 is compressively deformable in any of the first direction Z, the second direction X, and the third direction Y. The fire-resistant material 32 expands and deforms due to a restoring force that attempts to restore it to its original shape from the compressed and deformed state.

[0032] Because the fire-resistant material 32 contains expandable graphite, when it is heated to a predetermined temperature (e.g., 250°C) or higher, its volume expands to several times its volume before heating. Therefore, the fire-resistant material 32 is compressively deformable by the foamed chloroprene rubber, and thermally expandable by the expandable graphite. Therefore, the thermally expandable fire-resistant member 31 has thermal expansion properties.

[0033] The heat-expandable fire-resistant member 31 has a plurality of slits 35 cut in the thickness direction from one surface in the thickness direction. The slits 35 are cuts formed in the fire-resistant material 32 and the sheet material 33 attached to the first end surface 32a. If the dimension of the slits 35 in the thickness direction of the heat-expandable fire-resistant member 31 is taken as the depth, all of the slits 35 have the same depth. Furthermore, the slits 35 do not reach the second end surface 32b of the fire-resistant material 32. The heat-expandable fire-resistant member 31 can be cut using the slits 35 by hand or with a manual cutting tool such as scissors or a cutter.

[0034] <Sheet material> The sheet material 33 is attached to the entire first end face 32a and the entire second end face 32b. The sheet material 33 is made of nonwoven fabric. The sheet material 33 is not attached to the side face 32c of the fire-resistant material 32. Therefore, the side face 32c is an exposed surface of the fire-resistant material 32.

[0035] The thermally expandable fire-resistant member 31 has a first outer surface 31a on one of its end faces in the first direction Z and a second outer surface 31b on the other end face. Each of the first outer surface 31a and the second outer surface 31b is formed by a sheet material 33.

[0036] <Compression member> 4 and 5, the compression member 41 has a main body 42 made of the above-mentioned heat-expandable fire-resistant member 31, and a sealed bag 43 that houses the main body 42 and seals the main body 42. Because the main body 42 is made of the heat-expandable fire-resistant member 31, the fire-resistant material 32, the sheet material 33, and the slit 35 will be used in the description of the compression member 41.

[0037] The sealing bag 43 is a transparent film made of polyethylene. Therefore, the slit 35 formed in the main body 42 is visible from outside the sealing bag 43. In other words, the compression member 41 makes it possible to visually check the presence or absence of the slit 35 from outside the sealing bag 43. The sealing bag 43 before the main body 42 is sealed is a rectangular bag. The dimension in the direction in which the long sides of the sealing bag 43 before the main body 42 is sealed is greater than the dimension of the fire-resistant material 32 in the second direction X. The dimension in the direction in which the short sides of the sealing bag 43 before the main body 42 is sealed is greater than the dimension of the fire-resistant material 32 in the third direction Y. The sealing bag 43 before the main body 42 is sealed is bag-shaped and opens only on one side in the second direction X.

[0038] The compression member 41 is manufactured by placing the main body 42 inside a sealing bag 43, evacuating the inside of the sealing bag 43 to compress the fire-resistant material 32 of the main body 42, and then sealing the sealing bag 43. The inside of the sealing bag 43 is evacuated, for example, by sucking air into the inside of the sealing bag 43 using a suction device. When the inside of the sealing bag 43 is evacuated, the fire-resistant material 32 of the main body 42 is uniformly compressed in all directions, including the first direction Z, the second direction X, and the third direction Y, and is pressed by the inner surface of the sealing bag 43 facing the first direction Z. As a result, the fire-resistant material 32 of the main body 42 is significantly compressed in the first direction Z. The sealing bag 43 is in close contact with all six sides of the main body 42. The compression member 41 has a protruding edge 46 at a portion extending from the side surface 32c of the sealing bag 43. The protruding edge portion 46 protrudes in both the second direction X and the third direction Y beyond the side surface 32c of the fire-resistant material 32 in the main body 42. When the compression member 41 is viewed in the first direction Z, the protruding edge portion 46 has a rectangular frame shape surrounding the main body 42. The dimension of the protruding edge portion 46 from the main body 42 in the second direction X is the same as the dimension of the protruding edge portion 46 from the main body 42 in the third direction Y. However, the dimension of the protruding edge portion 46 from the main body 42 in the second direction X may be different from the dimension of the protruding edge portion 46 from the main body 42 in the third direction Y. The protruding edge portion 46 has dimensions in the second direction X and the third direction Y that allow it to be foldable.

[0039] In the compression member 41, the dimension of the main body 42 in the first direction Z is smaller than the dimension of the heat-expandable fire-resistant member 31 in the first direction Z. Note that for each of the heat-expandable fire-resistant member 31 and the compression member 41, the dimension in the first direction Z will be simply referred to as "thickness."

[0040] In the compression member 41, the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is thinner than the thickness before degassing. Specifically, the thickness of the compression member 41 is about 2 / 3 of the thickness of the thermally expandable fire-resistant member 31. In other words, the thickness of the compression member 41 is about 2 / 3 of the thickness of the fire-resistant material 32 before compression.

[0041] The dimensions of the fire-resistant material 32 of the compression member 41 in the second direction X and the third direction Y are larger than the dimensions of the heat-expandable fire-resistant member 31 in the second direction X and the third direction Y by the amount that the sealed bag 43 protrudes from the side surface 32c of the fire-resistant material 32. However, the dimensions of the fire-resistant material 32 of the compression member 41 in the second direction X and the third direction Y are slightly smaller than the dimensions of the heat-expandable fire-resistant member 31 in the second direction X and the third direction Y due to compression of the fire-resistant material 32.

[0042] Therefore, in the compression member 41, the plate-shaped main body 42 is housed inside the sealed bag 43, and the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is thinner than the thickness before degassing. Also, the thickness of the thermally expandable fire-resistant member 31 is greater than the thickness of the compression member 41.

[0043] When the inside of the sealed bag 43 is exposed to the atmosphere by cutting the sealed bag 43 or the like, the main body 42 of the compression member 41 returns to the shape it had before the fire-resistant material 32 was compressed and deformed by the intake air. Therefore, the compression member 41 exposes the main body 42 to the atmosphere, and the restoring force that attempts to restore the main body 42 before it was compressed causes the main body 42 to expand. When the main body 42 expands upon exposure to the atmosphere, the thickness of the compression member 41 becomes approximately the same as the thickness of the thermally expandable fire-resistant member 31.

[0044] The thermally expandable fire-resistant member 31 is more easily compressed and deformed than the compression member 41, but the compression member 41 is less likely to deform. <Method for blocking penetration and blocking member device> Next, a method for closing the penetration part Wa will be described.

[0045] As shown in Fig. 6, the worker places the support rack 14 in the penetration part Wa with the pair of elongated members 14a facing each other in the left-right direction. At this time, the support members 14b are not placed inside the penetration part Wa, but are placed outside on both sides in the wall thickness direction of the building wall W. Next, the worker passes the passing member 13 through the penetration part Wa and supports the passing member 13 with the multiple support members 14b.

[0046] Next, the worker performs a step of preparing a compression member 41 in which a plate-shaped main body 42 is housed inside a sealed bag 43 and the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is made thinner than before degassing, and a heat-expandable fire-resistant member 31 that has thermal expansion properties and is formed to be thicker than the thickness of the compression member 41. The compression member 41 may be delivered to the site where the penetration Wa is to be closed, or may be manufactured on site.

[0047] Next, the worker performs the step of arranging the heat-expandable fire-resistant members 31 and the compression members 41 in the penetration portion Wa. First, the worker arranges a plurality of heat-expandable fire-resistant members 31 in the gap K between the inner surface of the penetration portion Wa and the outer surface of the passing member 13. Specifically, the worker arranges a plurality of heat-expandable fire-resistant members 31 in the gap K between the lower wall surface W2 of the penetration portion Wa and the lower surface of the passing member 13.

[0048] At this time, the worker places the heat-expandable fire-resistant member 31 in the gap K of the penetration part Wa so that the second direction X of the heat-expandable fire-resistant member 31 extends in the left-right direction, the third direction Y extends in the wall thickness direction, and the first direction Z extends in the up-down direction. Also, only one heat-expandable fire-resistant member 31 is placed in the wall thickness direction of the building wall W. The worker places the heat-expandable fire-resistant member 31 in the gap K so that one side surface 32c of the heat-expandable fire-resistant member 31 is flush with the wall surface of the building wall W. At this time, the heat-expandable fire-resistant member 31 does not protrude from the back surface of the building wall W.

[0049] The worker stacks the heat-expandable fire-resistant members 31 from the lower wall surface W2 of the penetration portion Wa toward the upper wall surface W1. Therefore, the stacking direction of the heat-expandable fire-resistant members 31 is the vertical direction. Specifically, the worker places the heat-expandable fire-resistant members 31 on the lower wall surface W2, and then stacks them toward the multiple passing members 13 supported by the support rack 14. At this time, the worker places the heat-expandable fire-resistant members 31 in the gap K with the second outer surface 31b of one of the end surfaces in the first direction Z facing the lower wall surface W2 of the penetration portion Wa and the first outer surface 31a of the other end surface facing the outer surface of the passing member 13.

[0050] Of the stacked heat-expandable fire-resistant members 31, the first outer surface 31a of the heat-expandable fire-resistant member 31 facing the lower surface of the passing member 13 is in close contact with the outer surface of the passing member 13. At this time, a small gap is formed between the first outer surface 31a of the heat-expandable fire-resistant member 31 and the outer surface of the passing member 13, and this gap is filled with fire-resistant putty.

[0051] Furthermore, if a gap smaller than the dimension of the heat-expandable fire-resistant member 31 in the second direction X occurs, specifically, in FIG. 6 , if a gap smaller than the dimension of the heat-expandable fire-resistant member 31 in the second direction X occurs on the outer and inner sides of the left and right elongated members 14a, the heat-expandable fire-resistant member 31 is cut in the second direction X to adjust its length to fit the gap. Then, the worker stacks the heat-expandable fire-resistant members 31 whose length has been adjusted, placing them in the gap, from the lower wall surface W2 to the upper wall surface W1. Therefore, the process of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes a process of stacking multiple heat-expandable fire-resistant members 31 in the stacking direction, with the stacking direction being the up-down direction, which is the facing direction between the inner surface of the penetration portion Wa and the outer surface of the passing member 13.

[0052] Next, the worker places the heat-expandable fire-resistant member 31 above the passing member 13, and then stacks the heat-expandable fire-resistant member 31 toward the upper wall surface W1 of the penetration portion Wa. Therefore, the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes a step of arranging them in the gap K with one first outer surface 31a of both end surfaces in the first direction Z facing the upper wall surface W1 of the penetration portion Wa and the other second outer surface 31b facing the outer surface of the passing member 13.

[0053] As shown by the solid line in Fig. 7, a gap S is formed between the first outer surface 31a (top surface) of the uppermost heat-expandable fire-resistant member 31 and the upper wall surface W1 of the penetration portion Wa. This gap S is the gap between the first outer surface 31a of the heat-expandable fire-resistant member 31 already placed in the void K and the upper wall surface W1 (inner surface) of the penetration portion Wa. More specifically, the first outer surfaces 31a of the multiple heat-expandable fire-resistant members 31 located at the uppermost level are positioned at approximately the same height. Therefore, the lower surface of the gap S is approximately flat.

[0054] If the dimension of the gap S in the vertical direction is the same as the thickness of the heat-expandable fire-resistant member 31, then inserting the heat-expandable fire-resistant member 31 into the gap S will cause all of the gaps K to be blocked by the heat-expandable fire-resistant member 31. If the dimension of the gap S in the vertical direction is slightly smaller than the thickness of the heat-expandable fire-resistant member 31, then inserting the heat-expandable fire-resistant member 31 while compressing it in the first direction Z will cause all of the gaps K to be blocked by the heat-expandable fire-resistant member 31.

[0055] However, if the dimension of the gap S in the vertical direction is smaller than the thickness of the heat-expandable fire-resistant member 31, and further, even if the heat-expandable fire-resistant member 31 is compressed in the first direction Z, the dimension of the gap S is smaller than the thickness of the heat-expandable fire-resistant member 31, it is difficult to insert the heat-expandable fire-resistant member 31 into the gap S. The dimension of this gap S is larger than the thickness of the compression member 41. Then, the worker places the compression member 41 in the narrow gap S.

[0056] Therefore, in the method for closing the penetration Wa, the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes a step of arranging the heat-expandable fire-resistant member 31 in the penetration Wa so that the gap S is smaller than the thickness of the heat-expandable fire-resistant member 31 and larger than the thickness of the compression member 41, and then arranging the compression member 41 in the gap S. In the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K, the gap S is the gap S between the first outer surface 31a of the heat-expandable fire-resistant member 31 already arranged in the gap K and the upper wall surface W1 of the penetration Wa.

[0057] In this case, as shown by the dotted line in Figure 7, the worker presses the topmost heat-expandable fire-resistant member 31 downward from the first outer surface 31a, compressing the topmost heat-expandable fire-resistant member 31 in the thickness direction, and making the vertical dimension of the gap S larger than the thickness of the compression member 41.

[0058] Then, the worker places the compression member 41 in the expanded gap S. Therefore, the process of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K is a process of compressively deforming the heat-expandable fire-resistant member 31 so as to reduce the thickness of the heat-expandable fire-resistant member 31 in the first direction Z, and placing the compression member 41 in the gap S in a state in which the gap S is larger than the thickness of the compression member 41.

[0059] When the compression member 41 is placed in the gap S, the sealed bag 43 of the compression member 41 comes into sliding contact with the sheet material 33 of the heat-expandable fire-resistant member 31. The sliding resistance of the sealed bag 43, which is the outer surface of the compression member 41, against the sheet material 33, which is the outer surface of the heat-expandable fire-resistant member 31, is smaller than the sliding resistance between the sheet materials 33 of the heat-expandable fire-resistant member 31. Therefore, when the compression member 41 is placed in the gap S, the sliding contact of the compression member 41 against the heat-expandable fire-resistant member 31 can be reduced.

[0060] After that, the worker stops pressing the heat-expandable fire-resistant member 31 downward. Then, as shown in FIG. 8, the restoring force of the uppermost heat-expandable fire-resistant member 31, which restores it's original shape from its compressed and deformed state, pushes the compression member 41 up toward the upper wall surface W1 of the penetration Wa. In other words, the compression member 41 placed in the gap S is pressed by the restoring force of the compressed heat-expandable fire-resistant member 31. As a result, the compression member 41 comes into contact with the first outer surface 31a of the uppermost heat-expandable fire-resistant member 31 and the upper wall surface W1. As a result, the compression member 41 is temporarily installed in the penetration Wa.

[0061] As described above, the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes a step of stacking the heat-expandable fire-resistant members 31 from the lower wall surface W2, which is one of the opposing inner surfaces of the penetration part Wa, toward the upper wall surface W1, which is the other inner surface, and then abutting the compression member 41 against the upper wall surface W1 and against the heat-expandable fire-resistant member 31 adjacent to the upper wall surface W1. Furthermore, the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes a step of arranging the compression member 41 so that it is pressed by the heat-expandable fire-resistant member 31 and is sandwiched between the heat-expandable fire-resistant member 31 and the upper wall surface W1 of the penetration part Wa.

[0062] The worker arranges multiple compression members 41 in the gap S in the left-right direction of the building wall W. Therefore, the multiple compression members 41 are arranged across the entire gap S in the left-right direction, and almost the entire gap S is closed by the multiple compression members 41. That is, in the gap S between the first outer surface 31a of the topmost layer of the heat-expandable fire-resistant members 31 and the upper wall surface W1 serving as the inner surface of the penetration portion Wa, the multiple compression members 41 are arranged side by side to form a single row extending in the left-right direction. At this time, the compression member 41 arranged at the left end faces the left wall surface W3 via the sealing bag 43, and the compression member 41 arranged at the right end faces the right wall surface W4 via the sealing bag 43. Furthermore, adjacent compression members 41 in the left-right direction also face each other via the sealing bag 43. The protruding edge 46 of each compression member 41 is folded and arranged between the adjacent left wall surface W3, right wall surface W4, or another compression member 41. Therefore, the protruding edge portion 46 is accommodated in the gap S, and therefore, the deterioration of the appearance due to the protruding edge portion 46 is suppressed in the closed structure of the through portion Wa.

[0063] Furthermore, as a result of the above, a blocking structure for the penetration part Wa is formed in the building wall W, and a blocking member device for the penetration part Wa is also formed. The blocking member device for the penetration part Wa is arranged in the gap K between the inner surface of the penetration part Wa that penetrates the building wall W in the wall thickness direction and the outer surface of the passing member 13 that passes through the penetration part Wa, and is composed of a heat-expandable fire-resistant member 31 with thermal expansion performance, and a compression member 41 in which a plate-shaped main body 42 is contained inside a sealed bag 43, and the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is thinner than the thickness of the heat-expandable fire-resistant member 31.

[0064] Next, the worker cuts the sealed bag 43, exposing the fire-resistant material 32 in the main body 42 of the compression member 41 to the atmosphere, causing the main body 42 to expand due to the restoring force that attempts to restore the main body 42 before it is compressed, and then blocking the gap S with the expanded main body 42 and the heat-expandable fire-resistant member 31.

[0065] As shown in FIG. 9 , when the interior of the sealed bag 43 is exposed to the atmosphere, air is forcefully drawn into the sealed bag 43 due to the pressure difference between the interior of the sealed bag 43 and the atmosphere. The fire-resistant material 32 of the main body 42 expands with the intake of air, restoring its shape to its original shape before compression deformation. The main body 42, expanding in the vertical direction, presses against the upper wall surface W1 via the sealed bag 43 and also presses against the first outer surface 31a of the uppermost heat-expandable fire-resistant member 31 via the sealed bag 43. Furthermore, the side surface 32c of the main body 42, expanding in the horizontal direction, presses against the left wall surface W3, the right wall surface W4, or another adjacent compression member 41 via the sealed bag 43. By exposing the fire-resistant material 32 of the main body 42 to the atmosphere for all compression members 41 aligned in the horizontal direction, the gap S is blocked by the compression members 41 across the entire horizontal and vertical directions.

[0066] [Effects of the embodiment] According to the first embodiment, the following effects can be obtained. (1-1) The method for closing the penetration Wa includes a step of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K. That is, the method for closing the penetration Wa includes a step of using the heat-expandable fire-resistant member 31 and the compression member 41 in combination to close the gap K. The method for closing the penetration Wa includes a step of using the main body 42 of the expanded compression member 41 and the heat-expandable fire-resistant member 31 in combination to close the gap K. Therefore, the gap K of the penetration Wa is closed by the non-expandable heat-expandable fire-resistant member 31 and the expanded compression member 41.

[0067] Because the heat-expandable fire-resistant members 31 are not compressed like the compression members 41, there is no need to take into account the expansion of the volume of the heat-expandable fire-resistant members 31 when closing the voids K. For this reason, most of the voids K can be closed by the heat-expandable fire-resistant members 31. And even if there are gaps S that cannot be closed by the heat-expandable fire-resistant members 31, these gaps S can be closed by the expansion of the compression members 41. Therefore, even in the method of closing the penetrations Wa by expanding the compression members 41, by reducing the number of compression members 41 that are expanded, the penetrations Wa can be closed accurately and the formation of gaps S can be suppressed.

[0068] For example, one possible method of closing the penetration Wa is to use all of the components placed in the gap K as compression components 41. In this case, even if all of the compression components 41 expand, gaps S may still be formed. In this case, it is necessary to remove all of the expanded compression components 41 and redo the work of closing the penetration Wa. However, by using both the heat-expandable fire-resistant components 31 and the compression components 41, it is possible to prevent gaps S from being formed after the compression components 41 are expanded, thereby reducing the amount of unnecessary work involved in closing the penetration Wa.

[0069] (1-2) In the method for closing the penetration Wa, in the step of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K, the heat-expandable fire-resistant member 31 is placed in the gap K before the compression member 41 until the gap S is formed. Then, the compression member 41 is placed in the gap S. In other words, the heat-expandable fire-resistant member 31, which is thicker than the compression member 41, is placed in the gap K before the compression member 41. Therefore, most of the gap K can be efficiently closed with the heat-expandable fire-resistant member 31, and the worker can grasp the closing state of the gap K and therefore properly grasp the required amount of compression member 41. As a result, the gap S can be properly closed with the expanded compression member 41.

[0070] (1-3) In the process of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K, when placing the compression member 41 in the gap S, the worker compresses the uppermost heat-expandable fire-resistant member 31 in the first direction Z. This makes it possible to enlarge the gap S, making it easier to place the compression member 41 in the gap S.

[0071] (1-4) In the process of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K, the worker compresses the top heat-expandable fire-resistant member 31 in the first direction Z to enlarge the gap S, places the compression member 41 in the gap S, and then stops compressing the heat-expandable fire-resistant member 31. Then, the compressed heat-expandable fire-resistant member 31 returns to its original shape. The compression member 41 placed in the gap S is then pressed by the restoring force of the heat-expandable fire-resistant member 31. As a result, the compression member 41 abuts against the upper wall surface W1 of the penetration portion Wa that defines the gap S and the outer surface of the top heat-expandable fire-resistant member 31 due to the pressure from the heat-expandable fire-resistant member 31. This abutment allows the compression member 41 to be positioned in the gap S, thereby preventing the compression member 41 from moving significantly in the gap S.

[0072] (1-5) In the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K, the heat-expandable fire-resistant member 31 is arranged so that the gap S is smaller than the thickness of the heat-expandable fire-resistant member 31 and larger than the thickness of the compression member 41, and then the compression member 41 is arranged in the gap S. In this way, the gap K is blocked with the heat-expandable fire-resistant member 31, which is thick enough that the heat-expandable fire-resistant member 31 cannot be arranged therein, while a gap S in which the compression member 41 can be arranged is formed. This makes it easier to arrange the compression member 41 in the gap S.

[0073] (1-6) The sealing bag 43 of the compression member 41 is made of polyethylene. The sheet material 33 of the heat-expandable fire-resistant member 31 is made of nonwoven fabric. Therefore, when the compression member 41 is placed between the first outer surface 31a of the uppermost heat-expandable fire-resistant member 31 and the upper wall surface W1 of the penetration portion Wa, the sliding resistance generated between the sealing bag 43 and the sheet material 33 is not excessive. Therefore, the operation of placing the compression member 41 in the gap S can be easily performed.

[0074] (1-7) Because the sealed bag 43 is transparent, the fire-resistant material 32 sealed inside the sealed bag 43 can be seen from outside the sealed bag 43. Therefore, the slits 35 provided in the fire-resistant material 32 can be seen from outside the sealed bag 43. Therefore, the orientation of the compression member 41 and the type of the main body 42 inside the sealed bag 43 can be ascertained without opening the sealed bag 43.

[0075] (1-8) In the blocking member device for the penetration portion Wa, even if a gap S remains after the thermally expandable fire-resistant member 31 is placed in the gap K, the gap S can be blocked by expanding the main body 42 of the compression member 41. Therefore, in the device for expanding the compression member 41 to block the penetration portion Wa, the number of members to be expanded can be reduced, so that the penetration portion Wa can be blocked accurately and the formation of the gap S can be suppressed.

[0076] (1-9) The sheet material 33 in the heat-expandable fire-resistant member 31 reduces the sliding resistance between the heat-expandable fire-resistant members 31 compared to when the heat-expandable fire-resistant member 31 is made of only the fire-resistant material 32 without the sheet material 33. Therefore, the sheet material 33 can improve the workability when stacking the heat-expandable fire-resistant members 31.

[0077] (1-10) The compression member 41 degasses the inside of the sealed bag 43, compresses the main body 42, and also tightly attaches the sealed bag 43 to the main body 42. Therefore, the compression member 41 is less likely to deform than the uncompressed heat-expandable fire-resistant member 31. Therefore, when the compression member 41 is placed in the gap S, the compression member 41 is less likely to deform. This makes it easier to place the compression member 41 in a narrow gap S.

[0078] (Second embodiment) Next, a second embodiment of the method for closing a penetration portion, a closing member device for a penetration portion, and a compression member will be described. Note that in the second embodiment, detailed descriptions of the same parts as in the first embodiment will be omitted.

[0079] 10, the heat-expandable fire-resistant member 51 is strip-shaped. The heat-expandable fire-resistant member 51 is the heat-expandable fire-resistant member 31 of the first embodiment formed into an elongated strip-shaped member. Note that the slits 35 of the heat-expandable fire-resistant member 51 are not shown in the drawing.

[0080] The compression member 61 is a long, thin strip of the compression member 41 of the first embodiment. The compression member 61 has a long, thin, strip-shaped, plate-shaped main body 42 housed inside a sealed bag 43, and the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is thinner than before degassing. The heat-expandable fire-resistant member 51 has flexibility such that a thickness greater than that of the compression member 61 extends in the longitudinal direction. The thickness direction of the heat-expandable fire-resistant member 51 and the compression member 61 is the first direction Z. Although FIG. 10 illustrates the protruding edge portions 46 only at both ends of the compression member 61 in the longitudinal direction, the protruding edge portions 46 may extend to both ends of the compression member 61 in the lateral direction to surround the compression member 61.

[0081] <Method of blocking penetrations> 11, the through-hole Wa has a circular shape when viewed in the wall thickness direction of the building wall W. The worker passes the passing member 13 through the through-hole Wa and supports the passing member 13 with a support member (not shown).

[0082] Next, the worker performs a step of preparing the compression member 61 and the heat-expandable fire-resistant member 51. The compression member 61 may be carried to the site where the penetration portion Wa is to be closed, or the compression member 61 may be manufactured on site using the sealed bag 43 and the main body 42.

[0083] Next, the worker performs a step of placing the heat-expandable fire-resistant member 51 and the compression member 61 in the gap K. This step includes a step of winding the heat-expandable fire-resistant member 51 around the passing member 13 with one surface in the thickness direction of the heat-expandable fire-resistant member 51 facing the passing member 13 and placing it in the gap K.

[0084] Specifically, a worker winds the heat-expandable fire-resistant member 51 around the outer peripheral surface of the passing member 13 on the front side of the building wall W. The worker winds the heat-expandable fire-resistant member 51 around the passing member 13 with one surface in the thickness direction of the heat-expandable fire-resistant member 51 facing the passing member 13. The worker then moves the wound heat-expandable fire-resistant member 51 along the outer peripheral surface of the passing member 13 toward the penetration portion Wa, and places the heat-expandable fire-resistant member 51 wound around the passing member 13 in the gap K. Both ends of the heat-expandable fire-resistant member 51 in the longitudinal direction are butted together. Therefore, the heat-expandable fire-resistant member 31 covers the entire outer peripheral surface of the passing member 13 in the circumferential direction. A gap S is defined between the outer surface of the heat-expandable fire-resistant member 51 and the inner surface of the penetration portion Wa. The dimension of the gap S in the radial direction of the through portion Wa is greater than the thickness of the compression member 61.

[0085] The worker places only one heat-expandable fire-resistant member 51 in the wall thickness direction of the building wall W. The worker places the heat-expandable fire-resistant member 51 in the gap K so that one of the side surfaces 32c of the heat-expandable fire-resistant member 51 is flush with the wall surface of the building wall W. At this time, the heat-expandable fire-resistant member 51 does not protrude from the back surface of the building wall W.

[0086] Next, the worker places multiple compression members 61 in the gap S between the other surface in the thickness direction of the heat-expandable fire-resistant member 51 and the inner surface of the penetration portion Wa. Specifically, the worker places multiple compression members 61 in the annular gap K between the inner surface of the penetration portion Wa and the outer surface of the passing member 13. Therefore, the step of placing the heat-expandable fire-resistant member 51 and the compression members 61 in the gap K includes a step of placing the heat-expandable fire-resistant member 51 in the gap K with one of its end surfaces in the first direction Z facing the inner surface of the penetration portion Wa and the other facing the outer surface of the passing member 13.

[0087] The worker aligns the longitudinal direction of the compression member 61 with the wall thickness direction of the building wall W and inserts the compression member 61 into the gap S. Then, the worker inserts multiple compression members 61 in the circumferential direction of the penetration portion Wa, arranging the compression members 61 adjacent to each other in the circumferential direction to close the gap S over the entire circumferential direction. At this time, small gaps may be formed between the compression members 61 adjacent to each other in the circumferential direction. Furthermore, in the radial direction of the penetration portion Wa, a small gap S remains between the other surface in the thickness direction of the heat-expandable fire-resistant member 51 and the inner surface of the penetration portion Wa.

[0088] As a result of the above, a blocking member device is formed in the penetration portion Wa, which is composed of a heat-expandable fire-resistant member 51 and a compression member 61 that are arranged in the gap K between the inner surface of the penetration portion Wa that penetrates the building wall W in the wall thickness direction and the outer surface of the passing member 13 that passes through the penetration portion Wa. In this blocking member device, the heat-expandable fire-resistant member 51 has thermal expansion properties, and the compression member 61 has a plate-shaped main body 42 housed inside a sealed bag 43, and the thickness of the main body 42 compressed by degassing the inside of the sealed bag 43 is thinner than the thickness of the heat-expandable fire-resistant member 51.

[0089] Next, for all compression members 61, the worker exposes the fire-resistant material 32 in the main body 42 to the atmosphere, causing the main body 42 to expand due to the restoring force that attempts to restore the main body 42 before it is compressed, and then performs a process of blocking the gap S with the compression members 61 including the expanded main body 42 and the heat-expandable fire-resistant member 51.

[0090] Specifically, the worker cuts the sealing bags 43 of all the compression members 61 to expose the inside of the sealing bags 43 to the atmosphere. Then, as shown in FIG. 12 , air is forcefully drawn into the sealing bag 43 due to the pressure difference between the inside of the sealing bag 43 and the atmosphere. The main body 42 expands as the air is drawn in, restoring it to its original shape before being compressed and deformed. The first outer surface 31a of the main body 42, which has expanded in the thickness direction, radially presses the inner surface of the penetration portion Wa through the sealing bag 43, and the second outer surface 31b radially presses the heat-expandable fire-resistant member 51 through the sealing bag 43. Furthermore, both end faces of the main body 42, which has expanded in the circumferential direction of the penetration portion Wa, press the end faces against each other in the circumferential direction through the sealing bag 43.

[0091] According to the second embodiment, in addition to the effect (1-1) described in the first embodiment, the following effect can be obtained. The following effects can be obtained:

[0092] (2-1) Even if the gap S formed between the inner surface of the penetration portion Wa and the outer surface of the passage member 13 is annular, the gap S can be closed using the heat-expandable fire-resistant member 51 and the compression member 61. <Modification> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0093] In the compression member 41, the fireproof material 32 of the main body 42 does not have to be compressed in all of the first direction Z, the second direction X, and the third direction Y. Alternatively, in the compression member 41, the fireproof material 32 of the main body 42 does not have to be compressed uniformly in all of the first direction Z, the second direction X, and the third direction Y. However, in either case, it is preferable that the compression amount of the main body 42 of the compression member 41 in the first direction Z is greater than the compression amounts in the second direction X and the third direction Y.

[0094] In the compression member 41, the fireproof material 32 of the main body 42 may be compressed only in the first direction Z. The sealed bag 43 may be a translucent bag or a non-transparent bag, and may be made of a material other than polyethylene.

[0095] The slits 35 do not necessarily have to be formed in the heat-expandable fire-resistant members 31 and 51 and the main body 42 . The heat-expandable fire-resistant members 31 and 51 and the main body 42 may have projections and recesses to define the first outer surface 31a.

[0096] The sealed bag 43 of the compression member 41, 61 may be provided with a printed marking or other indicator that indicates the end face of the main body 42 where the slit 35 is formed. The sliding resistance of the outer surfaces of the compression members 41, 61 against the outer surfaces of the heat-expandable fire-resistant members 31, 51 may be the same or may be greater than the sliding resistance between the heat-expandable fire-resistant members 31, 51 themselves.

[0097] The heat-expandable fire-resistant members 31, 51 may be housed inside the sealed bag 43 in a compressed state by degassing the inside of the sealed bag 43. The heat-expandable fire-resistant members 31, 51 may then be released from the degassed state before being placed inside the penetration Wa, and then restored to a thickness at least greater than that of the degassed state before use.

[0098] According to this, the heat-expandable fire-resistant members 31, 51 can be maintained in a compressed state before the degassed state of the heat-expandable fire-resistant members 31, 51 is released, so that the heat-expandable fire-resistant members 31, 51 do not take up much space during storage or transportation.

[0099] In the second embodiment, a plurality of thermally expandable fire-resistant members 51 may be wound around the passage member 13 depending on the size of the gap K in the radial direction of the penetration portion Wa. In the second embodiment, when a plurality of passing members 13 pass through the penetration portion Wa, the step of arranging the heat-expandable fire-resistant member 51 and the compression member 61 in the gap K may be as follows: The compression member 61 is arranged between the heat-expandable fire-resistant member 51 wound around one of the passing members 13 adjacent to each other and the heat-expandable fire-resistant member 51 wound around the other passing member 13.

[0100] 13, in the first embodiment, one of the heat-expandable fire-resistant members 31 already placed in the void K is a first heat-expandable fire-resistant member 311, and another heat-expandable fire-resistant member 31 placed in the void K together with the first heat-expandable fire-resistant member 311 is a second heat-expandable fire-resistant member 312. The first heat-expandable fire-resistant member 311 and the second heat-expandable fire-resistant member 312 are adjacent to each other in the stacking direction.

[0101] With regard to the gap S formed between the first outer surface 31a of the second heat-expandable fire-resistant member 312 and the upper wall surface W1 of the penetration portion Wa, the dimension of the gap S in the vertical direction may be smaller than the thickness of the compression member 61. In this case, in the step of arranging the heat-expandable fire-resistant member 31 and the compression member 41 in the void K, the second heat-expandable fire-resistant member 312 may be lifted up, and the gap S may be formed between the second heat-expandable fire-resistant member 312 and the first heat-expandable fire-resistant member 311 below it, while the compression member 41 is inserted into the gap S.

[0102] In this configuration, even when the compression member 41 is placed in the gap S, a small gap S remains between the first outer surface 31a of the second heat-expandable fire-resistant member 312 and the upper wall surface W1 of the penetration portion Wa. Then, when the main body 42 of the compression member 41 is exposed to the atmosphere, the main body 42 expands due to a restoring force that attempts to restore the main body 42 before it is compressed, as shown in Fig. 14, and the expanded main body 42 and the heat-expandable fire-resistant member 31 close the gap S while closing the gap K. Even with this configuration, the gap S can be closed.

[0103] In the first embodiment, depending on the vertical dimension of the penetration portion Wa, only one layer of the heat-expandable fire-resistant member 31 may be placed on the lower wall surface W2. Therefore, the blocking member device of the penetration portion Wa may be formed from one layer of the heat-expandable fire-resistant member 31 in the vertical direction and one layer of the compression member 41 in the vertical direction.

[0104] In the first embodiment, the compression member 41 may be disposed between the heat-expandable fire-resistant member 31 placed or stacked on the lower wall surface W2 of the penetration portion Wa and the lower surface of the passing member 13. Therefore, the step of disposing the heat-expandable fire-resistant member 31 and the compression member 41 in the gap K includes the step of disposing them in the gap S between the heat-expandable fire-resistant member 31 already disposed in the gap K and the outer surface of the passing member 13.

[0105] In the first embodiment, in the step of arranging the heat-expandable fire-resistant members 31 and the compression members 41 in the gap K, the direction in which the inner surface of the penetration portion Wa faces the outer surface of the passing member 13 may be the left-right direction and the stacking direction may be the left-right direction, and the compression member 41 may be arranged between the outer surfaces of the heat-expandable fire-resistant members 31 stacked in the left-right direction and the left wall surface W3 or the right wall surface W4 facing this outer surface.

[0106] In the first embodiment, after stacking a plurality of heat-expandable fire-resistant members 31 in the stacking direction, the compression members 41 may be placed on the upper surfaces of the heat-expandable fire-resistant members 31, and then the heat-expandable fire-resistant members 31 may be inserted between the compression members 41 and the heat-expandable fire-resistant members 31. In other words, the compression members 41 do not have to be placed between the uppermost heat-expandable fire-resistant member 31 in the stacking direction and the upper wall surface W1. Furthermore, the compression members 41 do not have to be placed last in the void K after the heat-expandable fire-resistant members 31 are placed in the void K. As described above, the compression members 41 may be placed in the void K simultaneously with the heat-expandable fire-resistant members 31.

[0107] In the first embodiment, in the process of placing the heat-expandable fire-resistant member 31 and the compression member 41 in the void K, the compression member 41 may be placed in the void K first, and then the heat-expandable fire-resistant member 31 may be placed below the compression member 41.

[0108] In the second embodiment, the compression member 61 may be strip-shaped like the heat-expandable fire-resistant member 51. In this case, the heat-expandable fire-resistant member 51 is wound around the outer surface of the passing member 13 on the front side of the building wall W or inside the penetration portion Wa, and then the compression member 61 is wound around the already wound heat-expandable fire-resistant member 51 on the front side of the building wall W or inside the penetration portion Wa.

[0109] In the first embodiment, the compression members 41 arranged in the gaps S may be stacked in multiple layers in the stacking direction. In short, the number of compression members 41 may be changed as appropriate as long as the gaps S are not formed while the gaps K are blocked.

[0110] The building wall W is not limited to a hollow wall, but can be changed as appropriate to a concrete wall, earth wall, etc. The through-hole Wa may be formed inside a frame disposed along the inner surface of the through-hole Wa. In this case, the frame has a required length in the wall thickness direction so as to span the first partition wall 11 and the second partition wall 12.

[0111] The multiple slits 35 of the heat-expandable fire-resistant members 31, 51 are not limited to being arranged parallel to each other and not intersecting each other, but may be arranged so that the multiple slits 35 intersect each other at right angles or at an angle. In short, as long as the heat-expandable fire-resistant members 31, 51 can be cut using the slits 35 by hand or with a manual cutting tool such as scissors or a cutter, the shape of the slits 35 may be changed as appropriate.

[0112] In the first embodiment, only one stage of the compression members 41 is disposed in the gap S. However, multiple stages of the compression members 41 may be disposed in the gap S. In the first embodiment, the rows in which the compression members 41 are arranged may be spaced apart in the stacking direction with the rows of the thermally expandable fire-resistant members 31 sandwiched therebetween.

[0113] The main body 42 of the compression member 41 may be a fire-resistant member made of a material different from that of the heat-expandable fire-resistant member 31 . The main body 42 of the compression member 41 is a plate-like material that is compressed to a thin thickness by degassing the inside of the sealed bag 43, and as long as it is made of a material that expands when exposed to the atmosphere, it does not need to have the ability to expand due to heat or fire resistance.

[0114] In the first embodiment, an example is shown in which the compression members 41 are arranged side by side in the gap S defined between the first outer surface 31a of the topmost layer of the stacked heat-expandable fire-resistant members 31 and the upper wall surface W1 serving as the inner surface of the penetration portion Wa, so as to form one layer extending in the left-right direction, but the arrangement of the compression members 41 is not limited to this.

[0115] For example, in at least one stack of heat-expandable fire-resistant members 31 and compression members 41 stacked vertically, the heat-expandable fire-resistant member 31 is the topmost member, and the heat-expandable fire-resistant member 31 is abutted against the upper wall surface W1 of the penetration portion Wa. In this stack, the compression member 41 is located in a position other than the topmost position in the stacking direction. On the other hand, in another stack of heat-expandable fire-resistant members 31 and compression members 41 stacked vertically, the topmost member is the compression member 41, and the compression member 41 is abutted against the upper wall surface W1 of the penetration portion Wa. In this configuration, the left-right step consisting of the member abutting the upper wall surface W1 of the penetration portion Wa is formed by both the heat-expandable fire-resistant member 31 and the compression member 41. In short, as long as the main body 42 of the compression member 41 can expand to close the gap K and, ultimately, the gap S, the vertical position of the compression member 41 may be changed as appropriate.

[0116] In the second embodiment, an example was shown in which multiple compression members 61 were arranged in the annular gap K between the inner surface of the through portion Wa and the outer surface of the passing member 13, and the gap S was blocked by the compression members 61 over the entire circumferential direction. However, the arrangement of the compression members 61 is not limited to this. For example, the compression members 61 may be arranged over only a portion of the circumferential direction of the annular gap K. In short, as long as the main body 42 of the compression member 61 can be expanded to block the gap K and, ultimately, the gap S, the number of compression members 61 to be arranged may be changed as appropriate.

[0117] <Additional Notes> The technical ideas that can be understood from the above-described embodiment and modified examples will be described. <Appendix 1> a compression member in which a plate-shaped main body is accommodated inside a sealed bag, and the thickness of the main body compressed by degassing the inside of the sealed bag is thinner than the thickness before degassing; and a heat-expandable fire-resistant member having thermal expansion properties and formed to have a thickness greater than the thickness of the compression member; a step of arranging the heat-expandable fire-resistant member and the compression member in a gap between an inner surface of a penetration portion that penetrates a building wall in a wall thickness direction and an outer surface of a passing member that passes through the penetration portion; a step of exposing the main body of the compression member to the atmosphere, expanding the main body by a restoring force that attempts to restore the main body before being compressed, and closing the gap with the expanded main body and the thermally expandable refractory member, The method for closing a penetration, wherein the main body of the compression member is the thermally expandable fire-resistant member.

[0118] <Appendix 2> the heat-expandable fire-resistant member and the compression member are disposed in a gap between the inner surface of a penetration portion that penetrates a building wall in the wall thickness direction and the outer surface of a passing member that passes through the penetration portion, The thermally expandable fire-resistant member has thermal expansion properties, The compression member is a plate-shaped main body contained inside a sealed bag, and the thickness of the main body compressed by degassing the inside of the sealed bag is thinner than the thickness of the heat-expandable fire-resistant member, and the main body is the heat-expandable fire-resistant member. [Explanation of symbols]

[0119] K...gap, S...gap, W...building wall, Wa...penetration portion, Z...first direction, 13...passage member, 31, 51...thermal expandable fire-resistant member, 43...sealed bag, 35...slit, 41, 61...compression member, 42...main body.

Claims

1. a compression member in which a plate-shaped main body is accommodated inside a sealed bag, and the thickness of the main body compressed by degassing the inside of the sealed bag is thinner than the thickness before degassing; and a heat-expandable fire-resistant member having thermal expansion properties and formed to have a thickness greater than the thickness of the compression member; a step of arranging the heat-expandable fire-resistant member and the compression member in a gap between an inner surface of a penetration portion that penetrates a building wall in a wall thickness direction and an outer surface of a passing member that passes through the penetration portion; a step of exposing the main body of the compression member to the atmosphere, expanding the main body by a restoring force that attempts to restore the main body before it is compressed, and closing the gap with the expanded main body and the heat-expandable fire-resistant member.

2. The step of disposing the thermally expandable refractory member and the compression member in the gap includes: a gap between the thermally expandable refractory member already disposed in the gap and the inner surface of the penetration; a gap between the thermally expandable refractory member already disposed in the gap and the outer surface of the pass-through member; 2. A method for closing a penetration as described in claim 1, further comprising the step of placing the compression member in any of the gaps between the heat-expandable fire-resistant member already placed in the gap and another heat-expandable fire-resistant member that is also placed in the gap.

3. Regarding the thermally expandable fire-resistant member, a direction in which the member has a thickness greater than that of the compression member is defined as a first direction; The step of disposing the thermally expandable refractory member and the compression member in the gap includes: The heat-expandable fire-resistant member is disposed in the gap with one of both end surfaces in the first direction facing the inner surface of the penetration portion and the other surface facing the outer surface of the passing member, A method for closing a penetration portion as described in claim 2, wherein the heat-expandable refractory member is compressed and deformed to reduce its thickness in the first direction, and the compression member is placed in the gap while making the gap larger than the thickness of the compression member.

4. 4. The method for closing a penetration according to claim 3, wherein the compression member disposed in the gap is pressed by a restoring force of the compressed heat-expandable fire-resistant member.

5. The step of disposing the thermally expandable refractory member and the compression member in the gap includes: The method for closing a penetration according to claim 2, wherein the gap is formed to be smaller than the thickness of the heat-expandable fire-resistant member and larger than the thickness of the compression member, and then the compression member is placed in the gap.

6. The step of disposing the thermally expandable refractory member and the compression member in the gap includes: The method for closing a penetration according to claim 2, further comprising stacking a plurality of the heat-expandable fire-resistant members in a stacking direction in which the inner surface of the penetration and the outer surface of the pass-through member face each other.

7. The step of disposing the thermally expandable refractory member and the compression member in the gap includes: The method for closing a penetration according to claim 1, further comprising a step of disposing the compression member between a plurality of the heat-expandable fire-resistant members stacked in a thickness direction of the heat-expandable fire-resistant members.

8. the thermally expandable fire-resistant member is strip-shaped and flexible enough to extend in the longitudinal direction to a thickness greater than the thickness of the compression member; The step of disposing the thermally expandable refractory member and the compression member in the gap includes: a step of winding the heat-expandable fire-resistant member around the passing member with one surface in a thickness direction of the heat-expandable fire-resistant member facing the passing member and arranging the heat-expandable fire-resistant member in the gap; a gap between the other surface of the thermally expandable fire-resistant member in the thickness direction and the inner surface of the penetration portion; A method for closing a penetration portion as described in claim 1, which also includes a step of placing the compression member in the gap between the other surface in the thickness direction of the heat-expandable fire-resistant member and another heat-expandable fire-resistant member wrapped around another passing member.

9. The through-hole has a rectangular shape when viewed in the wall thickness direction, The step of disposing the thermally expandable refractory member and the compression member in the gap includes: After laminating the heat-expandable fire-resistant member from one of the opposing inner surfaces of the through-hole to the other inner surface, The compression member is brought into contact with the other inner surface and the heat-expandable refractory member adjacent to the other inner surface in the stacking direction of the heat-expandable refractory members, 2. The method for closing a penetration according to claim 1, further comprising a step of arranging the compression member so that it is pressed against the heat-expandable fire-resistant member and sandwiched between the compression member and the other inner surface of the penetration.

10. The heat-expandable fire-resistant member is accommodated in a sealed bag and is accommodated in a compressed state by degassing the inside of the sealed bag, The method for closing a penetration according to any one of claims 1 to 9, wherein the heat-expandable fire-resistant member is released from a degassed state before being placed in the penetration and restored to a thickness at least greater than that of the degassed state.

11. the heat-expandable fire-resistant member and the compression member are disposed in a gap between the inner surface of a penetration portion that penetrates a building wall in the wall thickness direction and the outer surface of a passing member that passes through the penetration portion, The thermally expandable fire-resistant member has thermal expansion properties, The compression member is a plate-shaped main body contained inside a sealed bag, and the thickness of the main body compressed by degassing the inside of the sealed bag is thinner than the thickness of the heat-expandable fire-resistant member.

12. the outer surface of the compression member is formed by the sealed bag; The sliding resistance of the outer surface of the compression member against the outer surface of the thermally expandable refractory member is The blocking member device for a penetration portion according to claim 11, wherein the resistance is smaller than the sliding resistance between the thermally expandable fire-resistant members.

13. a plate-shaped main body is contained inside a sealed bag, and the main body is compressed by degassing the inside of the sealed bag; A compression member characterized in that the main body has irregularities or slits cut in the thickness direction from one side formed on at least one side in the thickness direction, and the presence or absence of the irregularities or slits can be visually confirmed from outside the sealed bag.

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