JPWO2006054572A1 - Penetration through structure of compartment - Google Patents

Abstract

A fire-proof compartment penetration structure in which a fire-resistant sleeve 12 is inserted into a cable through-hole 11 of the fire-proof compartment 10 and a cable 14 is inserted through the sleeve 12, and one end of the sleeve 12, the cable 14, The gap between the two was covered with a thermally expandable sheet 20 that was thermally expanded at a predetermined temperature or higher to form an expanded heat insulating layer.

Description

  The present invention relates to a through-part structure for use in a partition body that partitions a building or the like and prevents the spread of fire at the time of a fire, and in particular, a fire-resistant sleeve is inserted in a cable through-hole of the fire-proof partition body, The present invention relates to a structure for penetrating a fire prevention compartment in which a cable is inserted into the sleeve.

  2. Description of the Related Art Conventionally, a fireproof compartment through-hole structure for piping is known (see Patent Document 1).

Such a fire-blocking compartment penetration part structure has a through-hole attached to a through-hole in a concrete wall through a mortar, and a pipe is inserted through the through-sleeve, and a fire-resistant putty is filled between the through-sleeve and the pipe. This is intended to prevent the spread of fire during the process.
JP-A-6-241352

  However, in such a fireproof partition wall penetration structure, in the case of a cable with a small diameter, the gap between the penetration sleeve and the cable is narrow due to the small diameter of the penetration sleeve, and the gap is filled. There was a problem with the workability of the fire-resistant putty.

  In addition, there is a construction method using a partition penetration measure kit, but there are problems such as high cost and construction time.

  An object of the present invention is to provide a penetrating structure for a partition body that is easy to construct and that can more reliably prevent the spread of fire due to a fire, and in particular, a penetrating structure for a fireproof section body such as a wall or a floor that constitutes a fireproof section. It is to provide.

  One feature of the present invention is that a through-hole structure of a partition body provided with a through-hole includes a fire-resistant sleeve inserted into the through-hole, a cable inserted through the sleeve, and one of the sleeves. A thermally expandable sheet covering a gap between the end portion and the cable, and a sleeve side of the thermally expandable sheet is wound around an outer peripheral surface of the one end portion of the sleeve, and the thermally expandable sheet The cable side of the sheet is wound around the outer peripheral surface of the cable.

  According to the through structure, the sleeve side of the thermally expandable sheet is wound around the outer peripheral surface of the one end portion of the sleeve, and the cable side of the thermally expandable sheet is only wound around the outer peripheral surface of the cable. Therefore, the construction is easy. Moreover, since the thermally expandable sheet is heated at a predetermined temperature or higher to thermally expand to form an expanded heat insulating layer, it is possible to more reliably prevent fire spread due to fire. According to this penetrating part structure, even if the thermally expandable sheet is provided only on the one end side of the sleeve, the fire-proof performance can be sufficiently exhibited. Therefore, for example, when the partition is a wall, fireproof construction can be performed even at a construction site where a sufficient work space cannot be secured. In addition, when the fireproof compartment is a floor, the construction is performed from the floor, so that workability is improved. Furthermore, it is possible to flexibly cope with the addition of cables.

  Another feature of the present invention is that the penetrating structure further includes a second thermally expandable sheet that covers a gap between the other end of the sleeve and the cable. Similar to the thermally expandable sheet provided on the one end side, the sleeve side of the second thermally expandable sheet is wound around the outer peripheral surface of the other end of the sleeve, The cable side of the thermally expandable sheet is wound around the outer peripheral surface of the cable.

  In the penetrating portion structure of the present invention, if the thermal expansion sheet is provided only on one end side of the sleeve, sufficient fireproof performance can be exhibited. However, it may be provided on both ends of the sleeve in this way.

  Another feature of the present invention is that, in the through-hole structure, a bushing is attached to the one end and / or the other end of the sleeve, and the sleeve side of the thermally expandable sheet is interposed via the bushing. It is wound around the outer peripheral surface of the one end and / or the other end of the sleeve. In this case, there may be a portion where the bushing is partially interposed between the thermally expandable sheet and the outer peripheral surface of the sleeve, and the expandable sheet is directly wound around the outer peripheral surface of the sleeve. In this case, the thermally expandable sheet is wound around the bushing and the outer peripheral surface of the sleeve.

  According to this feature, the bushing can be attached to the end portion of the sleeve, and the cable can be prevented from being damaged at the end portion of the sleeve. Such a bushing is preferably insulative.

  Another feature of the present invention is that in the through-hole structure, a filler is filled in a space formed between the one end and / or the other end of the sleeve, the thermally expandable sheet, and the cable. It is that you are.

  As the filler, a heat-resistant sealing material, a thermally expandable putty, or a nonflammable material such as rock wool or ceramic wool can be used. Filling the filler is particularly useful when the number of cables is small and the gap is large with respect to the diameter of the sleeve.

  Another feature of the present invention is that in the through-hole structure, the thermally expandable sheet is adhered to the outer peripheral surface of the one and / or the other end of the sleeve and / or the outer peripheral surface of the cable. That is.

  According to this feature, since the sleeve side can be attached simply by winding and sticking the thermally expandable sheet around the outer peripheral surface of the one and / or the other end of the sleeve, construction is easy. Moreover, since the cable side can be attached only by winding and sticking the said thermally expansible sheet around the outer peripheral surface of the said cable, construction is easy.

  In addition, since the thermally expandable sheet is adhered to the outer peripheral surface of the one and / or the other end of the sleeve and / or the outer peripheral surface of the cable, it faces inward in the event of a fire. The thermally expandable sheet that expands can be supported to close the gap, and the fireproof performance can be more reliably exhibited. This attachment by adhesion can be selectively applied to both the sleeve side and the cable side of the inflatable sheet, but it is preferable to adhere both sides for preventing fire spread.

  Another feature of the present invention is that the penetrating portion structure includes a pressing member that presses the cable side and / or the sleeve side of the thermally expandable sheet from the outside.

  According to this feature, the cable side and / or the sleeve side can be attached simply by winding the thermally expandable sheet around the cable and / or sleeve and pressing it from the outside with the pressing member. Further, the thermally expandable sheet that expands inward in the event of a fire can be supported by the pressing member to close the gap, and the fireproof performance can be exhibited more reliably. As this pressing member, a non-combustible tape such as a non-combustible band or wire, an aluminum glass cloth tape or an aluminum tape can be used.

  Another feature of the present invention is that, in the through-hole structure, the thermally expandable sheet includes a thermally expandable layer and a thermally nonexpandable layer, and the thermally nonexpandable layer is located outside the thermally expandable layer. is there.

  According to this feature, the non-thermal expansion layer located outside the thermally expandable layer hardly deforms during a fire and promotes expansion toward the inner side (that is, the cable side) of the thermally expanded layer. be able to. Therefore, the heat can be blocked more reliably and quickly. Such a heat non-expandable layer can be appropriately selected as long as it does not substantially expand due to heat from a fire and can function to prevent the inner heat expandable layer from expanding outward. .

Another feature of the present invention is a structure for penetrating a fireproof compartment in which a fire-resistant sleeve is inserted into the cable through-hole of the fireproof compartment, and the cable is inserted through the sleeve.
A thermally expandable sheet that covers the gap between the end of the sleeve and the cable inserted through the sleeve from the outside is provided only on one side of the sleeve.

  According to this feature, since the thermal expansion sheet that covers the gap between the end of the sleeve and the cable inserted through the sleeve from the outside is provided only on one side of the sleeve, its construction is easy. Moreover, since the thermally expandable sheet is heated at a predetermined temperature or higher to form a thermally expanded layer by thermal expansion, it is possible to more reliably prevent the spread of fire due to a fire. When the body is a wall, fire-proof construction is possible even at a construction site where a sufficient work space cannot be secured. In addition, when the fireproof compartment is a floor, the construction is performed from the floor, so that workability is improved. Furthermore, it is possible to flexibly cope with the addition of cables.

Another feature of the present invention is a structure for penetrating a fireproof compartment in which a fire-resistant sleeve is inserted into the cable through-hole of the fireproof compartment, and the cable is inserted through the sleeve.
A thermally expandable sheet is provided on both sides of the sleeve to cover the gap between the end of the sleeve and the cable inserted through the sleeve from the outside.

  According to this feature, since the thermally expandable sheets are provided on both sides of the sleeve so as to cover the gap between the end of the sleeve and the cable inserted through the sleeve from the outside, the construction is easy. Since the heat-expandable sheet is heated at a predetermined temperature or more to thermally expand to form an expanded heat insulating layer, it is possible to more reliably prevent fire spread due to fire.

  Another feature of the present invention is that a bushing is attached to the end of the sleeve.

  According to this feature, since the bushing is attached to the end portion of the sleeve, the cable can be prevented from being damaged at the end portion of the sleeve.

  Another feature of the present invention is that a gap between an end portion of the sleeve provided with the thermally expandable sheet and a cable inserted through the sleeve is closed with a filler.

  According to this feature, the gap between the end portion of the sleeve on the side where the heat-expandable sheet is provided and the cable inserted through the sleeve is closed with the filler. Can be prevented.

It is sectional drawing which showed the division body penetration part structure in the 1st test of Example 1 which concerns on this invention. FIG. 5 is a cross-sectional view illustrating a partition through-hole structure in a second test of Example 1. FIG. 5 is a cross-sectional view illustrating a partition through-hole structure in a third test of Example 1. FIG. 6 is a cross-sectional view illustrating a partition through-hole structure in a fourth test of Example 1. It is sectional drawing of the cover cap used for the penetration part structure of Example 2 of this invention. FIG. 6 is a cross-sectional view showing a through-hole structure of Example 2. 6 is a cross-sectional view according to a modified example of a cover cap used in the through-hole structure of Embodiment 2. FIG.

Explanation of symbols

10 Fire protection compartment (compartment)
11 Cable through hole 12, 52 Sleeve 12A, 52A One end of sleeve 12B, 52B Outer peripheral surface of one end of sleeve 12C, 52C Other end of sleeve 13 Bushing 14 Cable 14A Outer surface of cable 20 Heat Expandable sheet, second thermally expandable sheet 30 Filler 120 Cover cap 122 Casing 122A One end of casing 122B The other end of casing 122C Opening for expansion of thermally expandable material 124 Thermally expandable material
W1 Width of opening for thermal expansion material expansion
W2 Width of the internal space of the casing

  Hereinafter, the example which is an embodiment of the penetration part structure of the division object concerning this invention is described based on a drawing. In this embodiment, the compartment is a fire prevention compartment.

[First test]
FIG. 1 shows a structure for penetrating a fireproof compartment. In FIG. 1, reference numeral 10 denotes a concrete wall which is a fireproof compartment, and a through hole 11 for a cable is provided in the concrete wall 10. A sleeve 12, which is a conduit, is inserted through the cable through hole 11. Both ends of the sleeve 12 are provided with bushings 13 and 13 for protecting a cable 14 described later. The bushings 13, 13 are made of resin or metal, and are intended to prevent the cable 14 from being damaged at the end of the sleeve 12 when the cable 14 moves.

  The sleeve 12 is made of metal and has fire resistance, and a plurality of cables 14, 14,... Are inserted into the sleeve 12. The outer peripheral surface of the bushing 13 at one end (the right end in FIG. 1) of the sleeve 12 is wound around the cable 14, 14,... By the thermally expandable sheet 20, and between the one end of the sleeve 12 and the cables 14, 14. The gap is covered with the thermally expandable sheet 20. That is, one end of the sleeve 12 is wound with the cables 14, 14,.

  The thermally expandable sheet 20 is fixed to the cables 14, 14,... By a wire 16 as a pressing member. This fixing is sufficient if the portion where the thermally expandable sheet 20 contacts the cables 14, 14,... Is fixed.

  More specifically, the heat-expandable sheet 20 is obtained by laminating an aluminum glass cloth as a heat non-expandable layer on one side of a sheet-like resin composition as a heat-expandable layer, and is heated at a predetermined temperature or higher. Then, it expands in the thickness direction to form an expanded heat insulating layer. Here, the degree of expansion when the thermal expansion layer is heated is preferably 2 to 40 times the original volume, more preferably 3 to 40 times, and even more preferably 10 to 40 times. is there. Preferably, the resin composition is mixed with a tackifier, whereby the thermally expandable sheet 20 is directly adhered to the outer peripheral surface 12B of the sleeve 12 or indirectly through the bushing 13 or the like. be able to. At this time, the thermally expandable sheet 20 can be partially wound around the outer peripheral surface 12B via the bushing 13, and the remaining portion can be directly wound around the outer peripheral surface 12B. In this case, the thermally expandable sheet 20 is configured to be wound over the bushing 13 and the outer peripheral surface 12B.

  Such a heat non-expandable layer can be appropriately selected as long as it does not substantially expand due to heat from a fire and can function to prevent the inner heat expandable layer from expanding outward. . For this reason, nonflammable and flame retardant materials are desirable. For example, inorganic fiber paper using rock wool, ceramic wool, glass fiber, etc., flame retardant paper coated with a flame retardant, metal foil such as aluminum foil and stainless steel foil, aluminum foil laminated paper, aluminum glass cloth, etc. are used. be able to.

The heat-expandable sheet 20 is wound with the aluminum glass cloth facing outside. That is, the sleeve side 20 </ b> A of the thermally expandable sheet 20 is adhered to the outer peripheral surface 12 </ b> B of one end 12 </ b> A of the sleeve 12. Here, the sleeve side 20 </ b> A of the thermally expandable sheet 20 is attached to the outer peripheral surface 12 </ b> B via the bushing 13. Further, the cable side 20 </ b> B of the thermally expandable sheet 20 is wound around the outer peripheral surface 14 </ b> A of the cable 14. The cable side 20 </ b> B of the thermally expandable sheet 20 is pressed from the outside by the wire 16.
Hereinafter, a method for producing the thermally expandable sheet 20 will be described.

  42 parts by mass of butyl rubber (“Butyl # 065” manufactured by ExxonMobil Chemical Co., Ltd.), 50 parts by mass of polybutene (“Polybutene # 100R” manufactured by Idemitsu Petrochemical Co., Ltd.), and petroleum resin (“Escollet # 5320” manufactured by ExxonMobil Chemical Co., Ltd.) 8 parts by mass, 100 parts by mass of ammonium polyphosphate (“EXOLIT AP422” manufactured by Clariant), 30 parts by mass of neutralized thermal expansion graphite (“Frame Cut GREP-EG” manufactured by Tosoh Corporation), and aluminum hydroxide Resin obtained by kneading 50 parts by mass (“Hijilite H-31” manufactured by Showa Denko KK) and 100 parts by mass of calcium carbonate (“BF300” manufactured by Bihoku Flour Chemical Co., Ltd.) using a kneader. The composition (that is, the thermal expansion layer) is laminated with an aluminum glass cloth (that is, the thermal non-expansion layer) on one side by calendar molding. To produce a thermally expandable sheet 20 Te. In Example 1, the thermally expandable sheet 20 having a width of 1000 mm and a thickness of 2 mm was produced. However, the dimensions can be changed as appropriate, and the thickness is preferably 0.3 to 6 mm and the width is 40 mm to 200 mm.

In this first test, a steel conduit tube (JIS C 8305) having an outer diameter of 38.1 mm and a length of 300 mm was used as the sleeve 12, and this was embedded in a concrete wall 10 having a thickness of 100 mm in advance. As the cable 14, a CV38mm ² × 4 core cable was used. The thermally expandable sheet 20 was cut into a width of 60 mm and a length of 160 mm.

  According to the fireproof compartment penetration structure of the above embodiment, when a fire occurs inside the room around which the heat-expandable sheet 20 is wound, even if the cables 14, 14,. Are expanded together with the cables 14, 14,... To thermally expand to form an expanded heat insulating layer. More specifically, the thermal expansion layer of the thermally expandable sheet 20 expands, and further the expansion of the thermal expansion sheet 20 is suppressed by the thermal non-expandable layer, and an expanded heat insulating layer is formed around the cable 14. This expansion insulation layer closes the gap between the cables 14, 14,... And the sleeve 12, so that heat and flame are prevented from propagating through the sleeve 12, and from one room (the right room in FIG. 1). Heat, flame and smoke are prevented from entering the other room through the sleeve 12, and fire spread due to fire is prevented.

In addition, since the aluminum glass cloth is laminated on the surface of the heat-expandable sheet 20, it is possible to reliably prevent the spread of fire due to the heat by the heat reflection effect of the aluminum glass cloth layer and the heat shielding and flame shielding effects. .
When a fire occurs on the indoor side where the heat-expandable sheet 20 is not wound, the temperature and pressure in the room increase due to the fire, and heat and flame are passed through the sleeve 12 to the opposite side room (the right side room in FIG. 1). Although it is going to propagate, since the right end portion of the sleeve 12 is closed because the heat-expandable sheet 20 is wound around the right end portion of the sleeve 12, the inside of the sleeve 12 is in an oxygen deficient state, and Since the supply of heat is suppressed, it is possible to prevent the spread of fire.

  Further, since the heat-expandable sheet 20 is merely wound around one end of the sleeve 12 together with the cables 14, 14,..., When the diameter of the sleeve 12 is small, for example, φ19 mm, or the diameter is large, for example, φ104 mm. Even if the number of the cables 14, 14,... Is large and the gap between the sleeve 12 and the cables 14, 14,... Is narrow, the construction of the thermally expandable sheet 20 is possible regardless of the size of the diameter and the narrowness of the gap. It will be easy.

  In addition, in this penetrating portion structure, a tackifier is mixed in the thermal expansion layer, and the thermal expansion layer is adhered to the outer peripheral surface of one end 12A of the sleeve 12 by the tackifier. Yes. Therefore, in the heat-expandable sheet 20, it is only necessary to adhere to the heat-expandable layer having adhesiveness by the mixed tackifier, so that no separate adhesive or adhesive tape is required and construction is easy. It is.

  Further, if the pressing member is a wire 16 as in this through-hole structure, the cable 14 side can be easily held by simply winding the wire 16 as a pressing member around the thermal expansion sheet 20.

Furthermore, since only the heat-expandable sheet 20 is wound, the cable 14 can be flexibly accommodated.
[Second test]
FIG. 2 shows a fireproof compartment penetration structure according to the second test of the first embodiment.

In this second test, a steel conduit tube (JIS C 8305) having an outer diameter of 113.4 mm and a length of 300 mm was used as the sleeve 12, and this was embedded in a concrete wall 10 having a thickness of 100 mm in advance. A CVT 325 mm ² cable was used as the cable 14. The thermally expandable sheet 20 was cut into a width of 150 mm and a length of 460 mm.
In the second test, both end portions of the sleeve 12 (that is, one end portion 12A and the other end portion 12C) are wound together with the cables 14, 14,. The method for winding and fixing the thermally expandable sheet 20 is the same as in the first test. According to the second test, the heat-expandable sheets 20 at both ends of the sleeve 12 (that is, the heat-expandable sheet 20 and the second heat-expandable sheet 20) are thermally expanded to form an expanded heat-insulating layer. Since the gaps between the cables 14, 14,... And the end portions thereof are closed at the part, heat, flame, or smoke enters from the one room through the sleeve 12 into the other room. It can prevent more reliably and can prevent fire spread by fire more reliably.
[Third test]
FIG. 3 shows the fireproof compartment through-hole structure of the third test of Example 1. In the third test, a filler 30 is provided in a space formed between one end 12A of the sleeve 12, the thermally expandable sheet 20 and the cable 14, and the filler 30 forms one end 12A of the sleeve 12 and the cable 14, 14 is sealed (closed), and the one end portion 12A of the sleeve 12 and the filler 30 are wound together with the cables 14, 14,. The method for winding and fixing the thermally expandable sheet 20 is the same as in the first test.

In this third test, a steel conduit tube (JIS C 8305) having an outer diameter of 76.2 mm and a length of 300 mm was used as the sleeve 12, and this was embedded in advance in a concrete wall 10 having a thickness of 100 mm. A CVT 150 mm ² cable was used as the cable 14. The thermally expandable sheet 20 was cut into a width of 100 mm and a length of 260 mm.

  The filler 30 is composed of a heat-resistant sealing material (fire-resistant putty) or a non-combustible material, and the non-combustible material is, for example, rock wool or ceramic wool.

  According to the third test, the gap between the one end 12A of the sleeve 12 and the cables 14, 14,... Is sealed with the filler 30, so that the expansion heat insulation layer 20 by the thermally expandable sheet 20 is the same as in the first test. Is formed. Since the expansion heat insulating layer and the filler 30 block the gap between the cables 14, 14,... And the sleeve 12, heat, flame, or smoke passes from one room to the other room through the sleeve 12. Can be more reliably prevented from entering, and fire spread due to fire can be more reliably prevented.

In the third test, the filler 30 is provided only on the one end 12A side of the sleeve 12, but the filler 30 may also be provided on the other end 12C side. In this case, in the second test, a filler is added to both sides.
[Fourth test]
FIG. 4 shows a fireproof compartment penetration structure in a fourth test according to Example 1. In the fourth test, a cable through hole 51 for passing a cable through the upper and lower floors is provided in a floor 50 as a compartment / fireproof compartment, and a sleeve 52 is inserted into the cable through hole 51. A plurality of cables 14, 14,... Then, the thermally expandable sheet 20 was wound around the outer peripheral surface 52B of the upper end portion (that is, one end portion) 52A of the sleeve 52 via the bushing 13. Further, the heat-expandable sheet 20 was also wound around the cable 14, thereby covering the gap between the upper end portion 52 </ b> A and the cable 14.

In this fourth test, a steel conduit (JIS C 8305) having an outer diameter of 113.4 mm and a length of 300 mm was used as the sleeve 52, and this was embedded in a concrete wall 10 having a thickness of 100 mm in advance. A cable of CV 325 mm ² was used as the cable 14. The thermally expandable sheet 20 was cut into a width of 150 mm and a length of 460 mm.

  According to the fourth test, when a fire occurs on the lower floor, the temperature and pressure in the room increase due to the fire, and heat and flame try to propagate through the sleeve 52 to the upper floor. Since the heat-expandable sheet 20 is wound around the upper end portion of the sleeve 52, the upper end portion of the sleeve 52 is in a closed state, so that the inside of the sleeve 52 becomes deficient and the supply of heat is suppressed. Fire spread can be prevented.

Further, as in the first test, the heat-expandable sheet 20 is thermally expanded by the heat of the fire to form an expanded heat insulating layer, and this expanded heat insulating layer is formed between the cables 14, 14,. Since the gap is closed, heat, flame and smoke are prevented from entering the room on the upper floor from the room on the lower floor through the sleeve 52, and the spread of fire due to fire is prevented.
By the way, since the fire burns up from the bottom up, it does not spread from the upper floor to the lower floor, and the temperature of the floor is not high, so it is assumed that only the fire spreads from the lower floor to the upper floor What is necessary is just to wind the heat-expandable sheet 20 only on the upper side of the sleeve 52, and the prevention of fire spread can be effectively achieved.

  According to the fourth test, the thermally expandable sheet 20 is wound around the upper portion of the sleeve 52 together with the cables 14, 14,..., So that the wound thermally expandable sheet 20 is caught by the upper edge of the sleeve 52. As a result, the thermally expandable sheet 20 does not slip downward due to its own weight. Moreover, since the heat-expandable sheet 20 is wound on the floor 50, the construction is easy. Incidentally, when the heat-expandable sheet 20 is wound behind the ceiling, its workability is poor.

  In addition, when applied to the prior art by applying the test under the same conditions as Tests 1 to 4 of Example 1, in order to satisfy the Building Standard Act of Japan, 1 m in both the front and rear directions of the partition body that partitions the fire prevention compartment It is essential to use a sleeve (that is, a sleeve having a total length of 2 m). However, as a result of the experiment, all of the through-hole structures in Tests 1 to 4 of Example 1 were able to satisfy the building standard method with a sleeve of 300 mm before and after the partition (that is, a sleeve having a total length of 600 mm). That is, according to the through-hole structure of the present invention, it is possible to achieve a high fire spread prevention effect with a shorter sleeve, and thus space saving can be achieved.

The thermal expansion sheet 20 used in Example 1 preferably has an expansion ratio (ratio of thickness after expansion to initial thickness) of 3 to 40 times when heated under an irradiation heat amount of 50 kw / m ² as described above. It is not particularly limited as long as the gap formed by burning out the cable in the event of a fire is blocked and fireproof and heat insulating properties are exhibited. The thermally expandable sheet is preferably one having adhesiveness, and specifically, one comprising the following resin composition (I) or (II) is preferable.
As the resin composition (I), a resin component containing a rubber component, neutralized thermally expandable graphite and an inorganic filler are used.

  Examples of the rubber component include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene-butadiene rubber (SBR), and chloroprene rubber. (CR), nitrile rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPM, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), multiple addition Examples thereof include vulcanized rubber (U), silicone rubber (O), fluorine rubber (FKM, FZ), urethane rubber (U), polyisobutylene rubber, and butyl chloride rubber. These may be used independently and 2 or more types may be used together.

  Examples of the resin component other than the rubber component include polypropylene resins, polyethylene resins, poly (1-) butene resins, polyolefin resins such as polypentene resins; polystyrene resins, acrylonitrile-butadiene-styrene resins, Examples thereof include polycarbonate resins, polyphenylene ether resins, acrylic resins, polyamide resins, polyvinyl chloride resins, phenol resins, polyurethane resins, and the like. These may be used independently and 2 or more types may be used together.

The resin component may be subjected to modification, crosslinking, etc. within a range not impairing the fire resistance of the resin composition (I). The method of modification and crosslinking is not particularly limited, and is performed by a known method.
The thermally expandable sheet preferably has self-adhesiveness in order to facilitate construction when wound around a sleeve and a cable. The resin composition to which self-tackiness is imparted is not particularly limited, and examples thereof include those in which a liquid resin such as polybutene and a petroleum resin as a tackifier are blended in butyl rubber.

  The above-mentioned thermally expandable graphite is a conventionally known substance, and powders such as natural scaly graphite, pyrolytic graphite and quiche graphite are mixed with inorganic acids such as concentrated sulfuric acid, nitric acid and selenic acid, concentrated nitric acid, perchloric acid, It is a graphite intercalation compound produced by treatment with a strong oxidizing agent such as chlorate, permanganate, dichromate, hydrogen peroxide, etc., and is a crystalline compound that maintains the layered structure of carbon.

  The heat-expandable graphite treated with acid as described above is further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like. In the present invention, this neutralized heat-expandable graphite is used.

  The aliphatic lower amine is not particularly limited, and examples thereof include monomethylamine, dimethylamine, trimethylamine, ethylamine, propylamine, and butylamine.

  The alkali metal compound and alkaline earth metal compound are not particularly limited, and examples thereof include hydroxides such as potassium, sodium, calcium, barium, and magnesium, oxides, carbonates, sulfates, and organic acid salts. It is done.

  The particle size of the neutralized heat-expandable graphite is preferably 20 to 200 mesh. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, and a predetermined expanded heat insulating layer cannot be obtained.If the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large. When kneading, the dispersibility deteriorates, and the deterioration of physical properties is inevitable.

  As a commercial item of the said heat-expandable graphite by which the said neutralization process was carried out, Tosoh Corporation "frame cut GREP-EG", UCARCarbon "GRAFGUARD" etc. are mentioned, for example.

  The inorganic filler is not particularly limited, and examples thereof include metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide, water Hydrous minerals such as magnesium oxide, aluminum hydroxide, hydrotalcite; metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, barium carbonate; calcium sulfate, gypsum fiber, calcium silicate, etc. Calcium salt: silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite, imogolite, sericite, glass fiber, glass beads, silica balun, aluminum nitride, boron nitride, nitrogen nitride Silicon, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate “MOS” (trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel Examples thereof include fibers, zinc borate, various magnetic powders, slag fibers, and fly ash. These inorganic fillers may be used alone or in combination of two or more.

  Among the inorganic fillers, water-containing inorganic substances and / or metal carbonates are particularly preferable. The hydrous inorganic substance and the metal carbonate are considered to contribute to the improvement of the strength of the combustion residue and the increase of the heat capacity because they function as aggregates. In particular, carbonates (calcium carbonate, magnesium carbonate) of metals belonging to Group II or Group III of the Periodic Table are foamed during the combustion of the resin composition (I) to form a fired product. To preferred.

  The water-containing inorganic substances such as calcium hydroxide, magnesium hydroxide, and aluminum hydroxide are endothermic due to the water generated by the dehydration reaction during heating, and the temperature rise is reduced and high heat resistance is obtained, and The oxide remains as a heating residue, and this is particularly preferable in that the residue strength is improved by acting as an aggregate. Since magnesium hydroxide and aluminum hydroxide have different temperature ranges in which the dehydration effect is exhibited, when used together, the temperature range in which the dehydration effect is exhibited is expanded, and a more effective temperature rise suppressing effect is obtained.

  As a particle size of the said inorganic filler, 0.5-100 micrometers is preferable, More preferably, it is 1-50 micrometers. When the addition amount is small, the inorganic filler has a small particle size because dispersibility greatly affects the performance. However, when it is less than 0.5 μm, secondary aggregation occurs and the dispersibility deteriorates. When the addition amount is large, the viscosity of the resin composition increases and moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. A thing with a large diameter is preferable. Moreover, when a particle size exceeds 100 micrometers, the surface property of a molded object and the mechanical physical property of a resin composition will fall.

  In addition, it is more preferable to use a combination of a large particle size and a small particle size for the above inorganic filler. It becomes possible to do.

  Examples of the inorganic filler include, for example, aluminum hydroxide “Hidilite H-42M” (manufactured by Showa Denko KK) having a particle diameter of 1 μm, “Hijilite H-31” (manufactured by Showa Denko KK) having a particle diameter of 18 μm, And “Whiteon SB red” (product of Shiraishi Calcium Co., Ltd.) having a particle size of 1.8 μm, calcium carbonate, and “BF300” (product of Bihoku Flour Chemical Co., Ltd.) having a particle size of 8 μm.

  In the resin composition (I), the blending amount of the heat-expandable graphite subjected to the neutralization treatment is preferably 15 to 300 parts by mass with respect to 100 parts by mass of the resin component. When the blending amount is less than 15 parts by mass, a fireproof heat insulating layer having a sufficient thickness is not formed, so that the fireproof performance is lowered. When the blending amount is more than 300 parts by mass, the mechanical strength is greatly lowered and cannot be used.

  In the said resin composition (I), the compounding quantity of an inorganic filler has preferable 30-500 mass parts with respect to 100 mass parts of resin components. When the blending amount is less than 30 parts by mass, sufficient fire resistance cannot be obtained with a decrease in heat capacity, and when it exceeds 500 parts by mass, the mechanical strength is greatly decreased and cannot be used.

  The total amount of the heat-expandable graphite and the inorganic filler subjected to the neutralization treatment is preferably 200 to 600 parts by mass with respect to 100 parts by mass of the resin component. When the total amount is less than 200 parts by mass, sufficient fire resistance cannot be obtained, and when it exceeds 600 parts by mass, the mechanical strength is greatly lowered and cannot be used.

  As said resin composition (II), the thing containing the resin component containing a rubber component, a phosphorus compound, the heat-expandable graphite neutralized, and an inorganic filler is used. The neutralized thermally expandable graphite and inorganic filler used in the resin composition (II) are the same as in the resin composition (I).

  In the resin composition (II), by adding a phosphorus compound, flame retardancy and shape retention of combustion residues are improved.

  The phosphorus compound is not particularly limited. For example, red phosphorus; various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate , Metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; compounds represented by the following general formula (1), and the like. Among these, from the viewpoint of fire resistance, red phosphorus, ammonium polyphosphates, and compounds represented by the following general formula (Formula 1) are preferable, and ammonium polyphosphates are preferable in terms of performance, safety, cost, and the like. More preferred.

In the formula, R ¹ and R ³ represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms. R ² is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or carbon. The aryloxy group of Formula 6-16 is represented.

  The red phosphorus improves the flame retardant effect when added in a small amount. As the red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of safety such as moisture resistance and not spontaneous ignition during kneading, a material in which the surface of red phosphorus particles is coated with a resin is preferably used. .

  The ammonium polyphosphates are not particularly limited and include, for example, ammonium polyphosphate, melamine-modified ammonium polyphosphate, and the like, and ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. Examples of commercially available products include “EXOLITAP422”, “EXOLIT AP462” manufactured by Clariant, “Sumisafe P” manufactured by Sumitomo Chemical Co., “Terrage C60”, “Terrage C70”, “Terrage C80” manufactured by Chisso. .

  The compound represented by the general formula (1) is not particularly limited, and examples thereof include methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, and 2-methylpropylphosphonic acid. , T-butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid , Phenylphosphinic acid, diethylphenylphosphinic acid, diphenylphosphinic acid, bis (4-methoxyphenyl) phosphinic acid and the like. Of these, t-butylphosphonic acid is preferable in terms of high flame retardancy although it is expensive. The above phosphorus compounds may be used alone or in combination of two or more.

  The phosphorus compound is considered to promote expansion particularly by reaction with metal carbonates such as calcium carbonate and zinc carbonate, and in particular, when ammonium polyphosphate is used as the phosphorus compound, a high expansion effect is obtained. In addition, it works as an effective aggregate and forms a combustion residue having high shape retention after combustion.

  In the said resin composition (II), the compounding quantity of a phosphorus compound has preferable 50-150 mass parts with respect to 100 mass parts of resin components. When the blending amount is less than 50 parts by mass, sufficient shape retention cannot be obtained for the combustion residue, and when it exceeds 150 parts by mass, the mechanical properties are greatly deteriorated and cannot be used.

  In the resin composition (II), the blending amount of the heat-expandable graphite subjected to the neutralization treatment is 15 to 300 parts by mass with respect to 100 parts by mass of the resin component for the same reason as the resin composition (I). preferable.

  In the said resin composition (II), the compounding quantity of an inorganic filler is 30-500 mass parts with respect to 100 mass parts of resin components for the same reason as the said resin composition (I).

  The total amount of the phosphorus compound, neutralized thermally expandable graphite, and inorganic filler is preferably 200 to 600 parts by mass with respect to 100 parts by mass of the resin component. When the total amount is less than 200 parts by mass, sufficient fire resistance cannot be obtained, and when it exceeds 600 parts by mass, the mechanical strength is greatly lowered and cannot be used.

  In the resin compositions (I) and (II), phenolic, amine-based and sulfur-based antioxidants, metal harm-preventing agents, antistatic agents, stabilizers, cross-linking agents, and the like, as long as their physical properties are not impaired. , Lubricants, softeners, pigments and the like may be added.

  5 and 6 are schematic views showing a through-hole structure according to Embodiment 2 of the present invention. In addition, about the same thru | or equivalent part as the 1st-3rd test of Example 1, it demonstrates using the same name and code | symbol.

  The cover cap 120 shown in FIG. 5 is used for the penetration structure of the second embodiment. This penetration structure is particularly suitable as a fire spread prevention structure around the end of the sleeve through which a single cable is inserted.

  The cover cap 120 includes a casing 122 that is substantially undeformed with respect to heat in the event of a fire, and a thermally expandable material 124 that is filled in the internal space of the casing 122. For the casing 122, for example, aluminum, steel, or the like can be used. As the thermally expandable material 124, for example, the resin composition of the thermally expandable layer of the thermally expandable sheet 20 used in Example 1 can be used. However, in Example 2, since the thermally expandable material 124 is not used for adhesion of the outer peripheral surface of the sleeve as described later, it is not necessary to mix the tackifier.

  In this embodiment, the cover cap 120 is composed of two parts 120A and 120B. The two parts 120A and 120B have the same shape, and the parts are shared. The cover cap 120 formed by assembling the two parts 120A and 120B has a tube shape, one tube end (right side in FIG. 5) is formed in a hemispherical shape, and a circular opening 126 is provided at the tip thereof. It has been. The inner diameter of the tubular portion of the cover cap 120 can be appropriately changed according to the outer diameter of the sleeve to be applied, and the inner diameter of the opening 126 can be appropriately changed according to the outer diameter of the cable 14 to be applied.

  A space for filling the thermally expandable material 124 is formed inside the casing 122, and the thermally expandable material 124 is filled in this internal space. One end (one end) 122A side of the casing 122 is closed, and the other end (other end) 122B side has a bulging opening 122C that can bulge when the thermally expandable material 124 expands. Is provided. Further, an assembly flange 122D is formed on the other end 122B.

  Next, the penetration part structure of Example 2 using the cover cap 120 having such a configuration will be described.

  As shown in FIG. 6, in the through portion structure of the second embodiment, a sleeve 12 is inserted into a through hole 11 of a concrete wall 10 as a partition body, and one cable 14 is inserted into the sleeve 12. Has been. The cover cap 120 is assembled so as to cover the gap between the one end 12A of the sleeve 12 and the cable 14. At this time, since the cover cap 120 is composed of the two parts 120A and 120B, the assembly is easy.

  The penetration structure will be described in more detail. One end 122A of the casing 122 is attached to the outer peripheral surface 12B of one end 12A of the sleeve 12, and the other end 122B is on or near the outer peripheral surface 14A of the cable 14. Be placed. That is, the bulging opening 122c is located on the outer peripheral surface 14A of the cable 14 or in the vicinity of the outer peripheral surface 14A. Here, an adhesive tape or an adhesive is preferably provided between the other end 122 </ b> B and the outer peripheral surface 14 </ b> A of the cable 14. Thereby, the circumference | surroundings of 14 A of outer peripheral surfaces of the cable 14 can be obstruct | occluded more reliably.

  In the second embodiment, a bushing 13 is attached to one end 12A of the sleeve 12, and one end 122A of the casing 122 is attached to the outer peripheral surface 12B of the sleeve 12 via the bushing 13. At this time, one end 122A of the casing 122 can be appropriately attached to the sleeve 12 using an aluminum tape, a nonflammable band, a wire, or the like.

  About the other end 122 side of the casing 122, it arrange | positions so that the cable 14 may pass the opening 126, and it can fix by winding the pressing member 16 which consists of a wire and a band around the assembly flange 122D, for example.

  Also in the penetration structure of the second embodiment, the filler 30 can be filled into the space formed between the one end 12A of the sleeve 12, the cover cap 120, and the cable 14 as in the test 3 of the first embodiment. Is possible.

  When a fire occurs in the vicinity of a compartment having the penetrating portion structure of Example 2, the heat expandable material 124 expands due to the heat, but the end 122A side of the casing 122 is closed, so the heat expandable material 124 is closed. Bulges only from the bulging opening 122C. Moreover, the bulging opening 122c is located on the outer peripheral surface 14A of the cable 14 or in the vicinity of the outer peripheral surface 14A. Therefore, since the thermally expansible material for the increased volume swells toward the cable 14, the gap can be closed early and more reliably even when the cable 14 is burned out.

  In the second embodiment, since the cover cap 120 is composed of two parts, the cover cap 120 can be assembled even when the cable 14 is inserted, which is convenient. However, the cover cap 120 may be composed of one part, or may be composed of three or more parts.

Similarly to the second test of Example 1, a second cover cap (not shown) similar to the cover cap 120 may be provided on the other end 12C side of the sleeve 12.
[Modification]
A modification of the second embodiment will be described with reference to FIG. The cover cap 220 is a modification of the cover cap 120 used in the penetrating portion structure of the second embodiment, and the same or equivalent parts will be described using the same names and reference numerals.

  FIG. 7 shows a cross section along the cable insertion direction (that is, the longitudinal direction of the sleeve 12) when the cover cap 220 is attached to the sleeve 12 and the cable 14 as in FIG. Here, only one part of the two parts of the cover cap 220 is shown.

  In the cover cap 220, the width W1 of the opening 122C is smaller than the width W2 of the internal space of the casing 122. Here, the width W2 of the internal space does not need to be larger than the width W1 over the entire region, and may be partially larger. This is to increase the filling amount of the thermally expandable material 124 by increasing the width W2.

  In the through-hole structure using the cover cap 220 having such a configuration, the filling amount of the thermally expandable material 124 is large, and the expansion amount due to heating increases in proportion to the filling amount. That is, when the thermally expansible material 124 expands due to a fire, the amount of expansion is large, so even if the cable 14 is burned out, the gap can be closed more reliably at an earlier stage.

  That is, in the second embodiment, the through-hole structure of the partition body provided with the through-hole includes a fire-resistant sleeve inserted into the through-hole, a cable inserted through the sleeve, and one of the sleeves. A cover cap that covers a gap between the end portion and the cable, and the cover cap includes a non-deformable casing against heat and a thermally expandable material filled in the internal space of the casing, One end of the casing is attached to the outer peripheral surface of one end of the sleeve, the other end of the casing is disposed on or near the outer peripheral surface of the cable, and the other end of the casing is The end is provided with a feature that an opening for expanding the thermally expandable material is provided.

  According to this feature, just by attaching the cover cap to the end of the sleeve, the thermal expansion material in the casing expands in the event of a fire and expands from the opening to close the gap around the cable. .

  Another feature of the second embodiment is that, in the through portion structure, the width of the opening is smaller than the width of the internal space in a sectional view along the insertion direction of the cable.

  According to this feature, since the width of the opening is smaller than the width of the internal space, the amount of expansion of the heat-expandable material is large, and the thermally expandable material is expanded earlier and at a higher pressure during a fire. Close the cable area.

  Another feature of the second embodiment is that, in the through-hole structure, a bushing is attached to the one end of the sleeve, and the one end of the casing is connected to the sleeve via the bushing. It is adhered to the outer peripheral surface of the one end.

  According to this feature, the bushing can be attached to the end portion of the sleeve, and the cable can be prevented from being damaged at the end portion of the sleeve. Such a bushing is preferably insulative.

  Another feature of the second embodiment is that a filling material is filled in the space formed between the one end of the sleeve, the cover cap, and the cable in the through-hole structure.

  As this filler, a heat-resistant sealing material, rock wool, ceramic wool or the like can be used. Filling the filler is particularly useful when the number of cables is small and the gap is large with respect to the diameter of the sleeve.

  Another feature of the second embodiment is that, in the through-hole structure, the cover cap is composed of at least two parts, and the at least two parts are assembled from the one end and the outside of the cable.

  According to this feature, the installer can perform a fireproofing process on the end of the sleeve only by assembling the cover cap composed of at least two parts from the outside, and the construction is easy.

  Another feature of the second embodiment is that the penetrating structure further includes a second cover cap that covers a gap between the other end of the sleeve and the cable.

In the penetrating portion structure of the second embodiment, sufficient fireproof performance can be exhibited if the cover cap is provided only on one end side of the sleeve, but it may be provided on both end portions of the sleeve in this way.

Claims (13)

A through-hole structure of a partition body provided with a through-hole,
A fire resistant sleeve inserted through the through hole, a cable inserted through the sleeve, and a thermally expandable sheet covering a gap between one end of the sleeve and the cable,
A through portion in which the sleeve side of the thermally expandable sheet is wound around the outer peripheral surface of the one end of the sleeve, and the cable side of the thermally expandable sheet is wound around the outer peripheral surface of the cable Construction.   A second thermally expandable sheet covering the gap between the other end of the sleeve and the cable, and the sleeve side of the second thermally expandable sheet is an outer periphery of the other end of the sleeve The penetration part structure according to claim 1, wherein the cable side of the thermally expandable sheet is wound around an outer peripheral surface of the cable. A bushing is attached to the one end and / or the other end of the sleeve,
The penetration part structure of Claim 1 or 2 by which the sleeve side of the said thermally expansible sheet is wound around the outer peripheral surface of the said one and / or said other edge part of the said sleeve via the said bushing.   The penetration structure according to claim 1 or 2, wherein a filler is filled in a space formed between the one and / or the other end of the sleeve, the thermally expandable sheet, and the cable.   The penetration structure according to claim 3, wherein a filler is filled in a space formed between the one and / or the other end of the sleeve, the thermally expandable sheet, and the cable.   The through-hole structure according to claim 1, wherein the thermally expandable sheet is adhered to an outer peripheral surface of the one end portion of the sleeve and / or an outer peripheral surface of the cable.   The penetration part structure of Claim 1 provided with the pressing member which hold | suppresses the cable side and / or sleeve side of the said thermally expansible sheet from the outside. The thermally expandable sheet includes a thermally expandable layer and a thermally non-expandable layer,
The penetration part structure according to claim 1, wherein the non-thermally expandable layer is positioned outside the thermally expandable layer. A fire-resistant compartment penetration structure in which a fire-resistant sleeve is inserted into the cable through-hole of the fire-proof compartment and the cable is inserted into the sleeve,
A structure for penetrating a fireproof compartment, wherein a thermally expandable sheet is provided on only one side of the sleeve so as to cover a gap between the end of the sleeve and a cable inserted through the sleeve from the outside. A fire-resistant compartment penetration structure in which a fire-resistant sleeve is inserted into the cable through-hole of the fire-proof compartment and the cable is inserted into the sleeve,
A structure for penetrating a fireproof compartment, wherein a thermally expandable sheet is provided on both sides of the sleeve to cover a gap between an end of the sleeve and a cable inserted through the sleeve from the outside.   The fireproof compartment penetration structure according to claim 9 or 10, wherein a bushing is attached to an end of the sleeve.   The fire prevention according to claim 9 or 10, wherein a gap between an end portion of the sleeve provided with the thermally expandable sheet and a cable inserted through the sleeve is closed with a filler. Division body penetration part structure.   The fireproof compartment penetration part according to claim 11, wherein a gap between an end of the sleeve on the side where the thermally expandable sheet is provided and a cable inserted through the sleeve is closed with a filler. Construction.

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