JPH08126165A - Fireproof structure for cable penetration part - Google Patents

Abstract

PURPOSE: To facilitate the filling work regardless of the space factor of a cable and to hold a fireproof sealing material effectively, especially, when the floor slab is penetrated. CONSTITUTION: A conduit pipe 1 penetrating a floor slab 3 is secured to define a cable penetration hole 2 by the inner circumferential face of the conduit pipe. The annular gap between the fringe part 1a of opening on the opposite sides of the cable penetration hole and a bundle 4 of cables passing through the hole is filled with a fireproof sealing material to form fireproof members 5, 5 between the fringe part of opening on the opposite sides and the cables. Members 6, 6 for receiving the end faces 6a, 6a projecting in the outer circumferential direction and abutting against the outside end part of the fireproof member are secured to the outer circumference of the bundle of cables at the upper and lower outside positions of each fireproof member. Each receiving member is formed by winding a tape member 6a, made of a self-fusing flame resisting material, by predetermined number of turns around the bundle of cables and then bonding the tape member rigidly to the bundle of cables integrally therewith.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof structure of a cable penetrating portion arranged through a partition wall or a floor wall of a fireproof structure such as a hotel, a condominium or an office building, and particularly to an electric wire cable. The present invention relates to a fireproof structure for a relatively small diameter cable penetration portion.

[0002]

2. Description of the Related Art Conventionally, as a fireproof structure for a cable penetration portion of this type, a structure using a conduit tube has been well known (see, for example, Japanese Utility Model Publication No. 61-34812). This is to fix a conduit into a circular small hole that penetrates through a partition wall or floor wall so that both ends of the conduit protrude, and a cable through hole is formed by this conduit. An example of the use is shown in FIG. In the case of the fireproof structure shown in the figure, a cable bundle 52 is provided in the conduit tube 51.
While penetrating through, and filling the annular space between the inner peripheral surface of the electric wire tube 51 and the cable bundle 52 in the middle portion excluding both ends of the electric wire tube 51 with rock wool 53 as a heat insulating material at a predetermined packing density, Both ends of the conduit 51 and the cable bundle 52
Putty-like fireproof sealant 5 in both annular gaps with the outer periphery of the
4 are respectively filled.

As another example of the case where the above conduit is used, a fireproof seal is provided while avoiding troublesome packing density management and adverse effects on occupational safety and health associated with the rock wool filling work in the structure shown in FIG. In order to facilitate the filling work of the material, a structure in which the fireproofing treatment is performed by filling the fireproof sealing material only in the vicinity of both ends of the conduit is also adopted. That is, as shown in FIG. 6, the annular gap between the opening edges 61a at both ends of the conduit 61 and the outer periphery of the cable bundle 62 at that position is filled with the fire-proof sealant 63 in a substantially conical shape. A fireproof structure is constructed by raising and covering the outer circumference of the cable bundle 62 with the fireproof sealing material 63 for a predetermined length in the cable longitudinal direction.

On the other hand, it is also known that a cable through hole is constituted by a small-diameter hole formed in a partition wall or a floor wall without using the above-mentioned conduit tube. In this case, as shown in FIG. 7, the cable bundle 72 is directly arranged through the cable through hole 71, which is the small diameter hole, and the inner peripheral surface of the cable through hole 71,
A fireproof structure is configured by filling the entire space between the cable bundle 72 and the outer peripheral surface with the fireproof sealant 73.

[0005]

However, FIG.
In the case of the fireproof structure shown in, the diameter is relatively small (for example, 50 to 20).
Since the rock wool 53 and the fireproof sealant 54 are filled inside the electric wire tube 51 having a diameter of about 0 mm), the above filling work is extremely difficult in relation to the number of the cable bundles 52 arranged inside. And other problems occur.
That is, when the cable space factor, which is the ratio of the cross-sectional area of the cable bundle 52 to the opening area of the conduit 51, is a small value, the inside between the cable bundle 52 and the inner peripheral surface of the conduit 51 is reduced. Since the cross-sectional area of the space is relatively large, the work of filling the rock wool 53 and the fireproof sealant 54 is relatively easy, but a relatively large amount of rockwool and the fireproof sealant is required. On the contrary, when the cable space factor is large, the cross-sectional area of the internal space is relatively small and the conduit 51 is originally small in diameter. Material 5
4 will be filled in an extremely narrow gap, and this filling operation will be extremely difficult.

On the other hand, according to the fireproof structure shown in FIG. 6, it is advantageous in that the filling work is performed in the vicinity of both ends of the conduit 61, but in particular, the cable penetrating portion moves up and down the floor wall. In the case where the fireproof sealant 63 on the lower side is filled with the fireproof sealant 63, the fireproof sealant is relatively heavy in the filling portion of the lower fireproof sealant 63. Therefore, the filling operation itself becomes extremely difficult, and even if the adhesive can be held during the work, there is a risk that it will fall later. This tends to be particularly remarkable when the cable space factor is small.

Therefore, when the conduits 51 and 61 are used, the filling work can be easily carried out regardless of the space factor of the cable, and the fireproof sealing material to be filled especially when penetrating the floor wall is effective. There is a demand for the development of a fireproof structure that can be retained in the.

On the other hand, also in the fireproof structure shown in FIG. 7, when the cable bundle 72 is arranged to penetrate vertically through the floor wall, the filling fireproof sealing material 73 is below the cable through hole 71. There is a risk of falling off from the side opening, and in particular, if the cable space factor is a small value, there is the inconvenience of falling off.
It has the same problem as when 1 is used.

The present invention has been made in view of such circumstances, and an object of the present invention is to easily perform a filling operation regardless of the cable space factor, and especially for a floor wall. The purpose is to effectively hold the fireproof sealant to be filled when it is penetrated.

[0010]

In order to achieve the above object, the invention according to claim 1 is arranged such that a cable is penetrated through a cable through hole penetrating a partition wall or a floor wall of a structure,
A ring-shaped gap between the opening edges on both sides of the cable through hole and the outer periphery of the cable located on the opening edges on both sides is filled with a fireproof sealant to block between the opening edges on both sides and the cable. It is premised that a fire protection member in the shape of a circle is formed. In this structure, at least at one side of the cable through hole and outside the cable at a position outside the fire protection member in the longitudinal direction of the cable, it projects in the outer circumferential direction of the cable and contacts the outer end of the fire protection member. The configuration is such that the receiving member is fixed.

According to a second aspect of the present invention, the receiving member according to the first aspect is formed by winding a tape-shaped member around the outer circumference of the cable.

According to a third aspect of the invention, the tape-shaped member according to the second aspect of the invention is formed of a flame-retardant material having a self-fusing property.

According to a fourth aspect of the present invention, there is provided an electric wire tube in which the cable through hole in the first aspect of the invention is fixed to a partition wall or floor wall of a structure so as to penetrate the partition wall or floor wall and project to both sides. It is formed by the inner peripheral surface of.
Then, the fire prevention member is formed on each side of the opening edge portions on both sides of the conduit.

According to a fifth aspect of the present invention, the cable through hole in the first aspect of the invention has an inner peripheral surface of a through hole formed in a partition wall or floor wall of a structure so as to penetrate the partition wall or floor wall. Formed by. Further, the fireproof member is formed by densely filling the fireproof sealant in the range between the opening edge portions on both sides of the through hole.

The invention according to claim 6 is the same as claim 1.
A configuration in which the cable through hole in the invention described above penetrates the floor wall in the vertical direction, and the receiving member is fixed so as to abut the lower end of the fire prevention member at the lower position with the cable through hole interposed therebetween. To do.

[0016]

According to the above-mentioned structure, according to the first aspect of the present invention,
A receptacle that protrudes in the cable outer peripheral direction and abuts the outer end portion of the fire protection member around the outer periphery of the cable at the outer end position of at least one of the fire protection members interposed between the cable hole and both sides of the hole. Since the member is fixed, even if the cable space factor becomes a small value and a relatively large amount of fireproof sealing material is used to form the fireproofing member, the fireproof sealing material filled in the receiving member. Acts as a stopper to prevent relative movement along the cable. Therefore, regardless of the cable space factor, the formation of the fireproof member formed by filling the fireproof sealing material can be facilitated and ensured, and the flame through the opening between the cable through hole and the cable can be flamed. It is certain that the effects of the fire prevention member such as the insulation of the cable and the heat insulation / fire spread prevention of the cable itself are obtained.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the receiving member is formed by winding the tape-shaped member around the cable, the receiving member is formed. Will be easier. Moreover,
The thickness of the tape-shaped member protrudes in the outer circumferential direction of the cable, and the protruding end surface contacts the fire prevention member to support the fire prevention member.Therefore, by adjusting the number of windings of the tape member, the cable space factor can be reduced. It is possible to easily change and adjust the protrusion amount of the receiving member depending on the circumstances.

According to the third aspect of the invention, since the tape-shaped member according to the second aspect of the invention is formed of a material having a self-bonding property, the tape-shaped members wound a plurality of times are self-bonded. As a result, the receiving member as a whole is formed integrally, and is firmly fixed to the sheath forming the outer surface of the cable to fix the position. In addition, since the tape-shaped member is made of a flame-retardant material, the receiving member itself has the same heat insulation and
It plays the role of preventing the spread of fire, and it is possible to improve the performance of the receiving member in the longitudinal direction of the cable or to reduce the range of formation of the fire preventing member by the amount of the receiving member in order to achieve a predetermined fire protection performance.

According to the invention described in claim 4, in addition to the operation according to the invention described in claim 1, the cable through hole is formed by an electric wire tube, the cable is disposed through the electric wire tube, and the fire prevention member is provided with the electric wire tube. Are formed at the opening edges of both projecting ends. Since the receiving member is attached to the outer end position of the one-sided fire-preventing member having such a structure, the filling work of the fire-prevention sealing material is performed only in the vicinity of the projecting end portion of the conduit tube, and the one-sided fire-preventing member It is possible to facilitate and ensure the formation of the.

According to the invention of claim 5, in addition to the function of the invention of claim 1, the cable through hole is formed by the through hole, the cable is arranged through the through hole, and the fire prevention member is The fireproof sealant is filled in and formed in the entire gap between the opening edges in the through hole. Even in a fireproof structure in which a relatively large amount of fireproof sealing material for forming such a fireproof member is used, the receiver member is fixed at the outer end position on one side of the fireproof member. Due to the stopper function, the filling work of the fireproof sealing material is facilitated, and the formation of the fireproof member is facilitated and ensured regardless of the cable space factor.

Further, in the invention according to claim 6, in addition to the operation according to the invention according to claim 1, the cable through hole penetrates the floor wall in the vertical direction, and the fire-preventing member at a position below the cable through hole. Since the receiving member is fixed so as to come into contact with the lower end portion of the above, the filling work of the fireproof sealing material can be facilitated by using this receiving member as a base, and the filled fireproof sealing material can be further protected by the receiving member. Since the downward displacement is received so as to be blocked, the fire-preventing member is prevented from falling during the filling operation or after the forming operation, and the holding of the fire-preventing member is ensured. In particular, when the cable space factor is a small value, or when the fireproof sealing material for forming the fireproof member is relatively large, as in the case of the invention of claim 5, the self-weight is prevented. It becomes effective in holding.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 and 2 show a fireproof structure for a cable penetrating portion according to a first embodiment of the present invention. The present invention is applied to the case where the cable through hole 2 is formed by.

In the figure, 3 is a concrete floor wall which constitutes a fireproof partition floor in the fireproof structure part. The floor wall 3 is penetrated vertically in advance when the floor wall is constructed so that the conduits 1 project vertically. It is fixed in a state in which it is arranged or penetrated vertically through a hole having a relatively small diameter (for example, a diameter of 100 mm) and circularly penetrated after construction through a mortar or the like. The inner peripheral surface of the electric wire tube 1 constitutes a cable through hole 2. Reference numeral 4 denotes a cable bundle in which a plurality of cables 4a, 4a, ... Are bundled, and the cable bundle 4 is arranged so as to vertically pass through the cable through hole 2. Reference numerals 5 and 5 are a pair of fire protection members, and reference numerals 6 and 6 are a pair of receiving members disposed at the outer positions of both fire protection members 5 and 5. In the figure, 7 and 7 are insulation bushes, and each insulation bush 7 is the above-mentioned conduit tube 1.
It is fixed by being fitted on both ends of. Hereinafter, the fire protection members 5 and the receiving members 6 will be described in detail.

Each of the fire protection members 5 has an opening edge portion 1 on both upper and lower sides of the conduit tube 1 as a hole edge portion of the cable through hole 2.
a and the insulating bushes 7 and the cable bundles 4 in a predetermined cable longitudinal direction outer range from the positions of the opening edge portions 1a.
A fireproof sealant is filled between the outer periphery and the outer periphery and is formed into a trapezoidal block shape. In addition, each of the fire protection members 5 shields the opening of the cable through hole 2 between the opening edge portion 1a and the outer periphery of the cable bundle 4 to block the passage of flame and smoke, and a predetermined length in the cable longitudinal direction. The outer peripheral surface of the cable bundle 4 is covered over the range so as to be insulated from the flame heat. The fireproof sealant is preferably putty-like from the viewpoint of workability, and this sealant is preferably filled in all the slits such as the valleys of the cables 4a of the cable bundle 4.

The above fireproof sealant includes the following non-foaming putty or foaming putty. As the non-foaming putty, a flame retardant is mixed and dispersed in a liquid binder at room temperature such as polybutene, silicone oil, liquid paraffin, and liquid chloroprene polymer, and has an oxygen index of 50 or more, particularly 60 or more. Is used. Examples of the flame retardant include halogen-containing organic flame retardants such as decapromodiphenyl oxide and hexapromobenzene, metal oxides such as antimony trioxide, alumina hydrate, magnesia hydrate, and basic magnesium sulfate hydrate. Or one or more hydrated metal oxides such as basic magnesium carbonate hydrate and basic magnesium phosphate hydrate are used.
In particular, it is preferable to use one or more hydrated metal oxides. Specific examples of the above non-foaming putty include liquid chloroprene described in JP-B-63-460, JP-A-56-106935, etc. as a base, and if necessary, an inorganic filler or heat-resistant fibers. Examples of the compound include DF putty N (trade name of Mitsubishi Cable Industries, Ltd.).

The foaming putty includes hydrocarbon polyhydric alcohols such as pentaerythritol, melamine,
A composition in which a foaming material such as dicyandiamide and a flame retardant dehydrating agent such as ammonium polyphosphate are mixed and dispersed in a liquid binder such as polybutene or liquid paraffin at room temperature is used. As an example of such an effervescent putty, Japanese Patent Publication No.
For example, DF putty A (trade name of Mitsubishi Cable Industries, Ltd.) may be used. In addition, the above-mentioned "foamable putty" is a putty that thermally decomposes itself to generate foamed carbide when heated to a high temperature.

On the other hand, each of the receiving members 6 is formed by winding a tape-like member 6a at an outer position in the cable longitudinal direction of each of the fire-preventing members 5, for example, like a sumo wrestler's makeup whirl. 4, the tape-shaped member 6a protrudes in the outer peripheral direction by the thickness of the tape-shaped member 6a, and the protruding end surface 6b is in contact with the outer end surface of each of the fire protection members 5.
The tape-shaped member 6a has a large or small value of the cable space factor, which is the ratio of the cross-sectional area of the cable bundle 4 to the opening area of the cable through hole 2, specifically, the outer diameter of the cable bundle 4 and the cable through hole. The number of windings is determined according to the size of the difference between the inner diameter and the inner diameter of 2, and thus, the cable bundle 4 is protruded from the cable bundle 4 by a predetermined dimension in the outer peripheral direction. The order of forming the receiving members 6 with respect to the fire protection members 5 may be before or after the formation of the fire protection members 5, but particularly on the lower side, the fire protection members are formed after the receiving members 6 are formed first. It is preferable to form No. 5 from the viewpoint of facilitating the forming work.

The tape-shaped member 6 is made of a flame-retardant material which has self-bonding property and is firmly adhered to the sheath of each cable 4a forming the outer peripheral surface of the cable bundle 4. As a result, the tape-shaped members 6a wound a plurality of times are integrated with each other and are integrated so as not to move relative to the cable bundle 4.

Tape-like member 6a having such characteristics
The tape-shaped flame-retardant organic material having an oxygen index of 30 or more, preferably 35 or more is used as an example of the flame-retardant organic material. The compounded composition is used. As the organic polymer resin, conventionally known resins can be widely used, and examples thereof include olefin homopolymers such as polyethylene, olefin copolymers such as ethylene-propylene rubber, and vinyl such as styrene-butadiene rubber. Copolymers of olefin monomers and olefins, halogen-containing polymers such as epichlorohydrin, and other plastics and rubbers such as nylon are used. Other examples of the flame-retardant organic material include resins having a high halogen content, such as hard polyvinyl chloride, tetrafluoropolyethylene / propylene copolymer, and polyvinylidene fluoride.

Further, as the flame-retardant material for forming the tape-shaped member 6a, a foamable fire-preventive material exhibiting fire resistance equal to or higher than that of the above-mentioned flame-retardant organic material may be used. This foamable fireproof material is a generic term for materials that pyrolyze themselves to generate foamed carbide when heated to a high temperature.The foamable fireproof material in this example is a liquid at room temperature in the foamable putty described above. Instead of the binder, a composition using a high molecular weight polymer that is solid at room temperature as a binder or a crosslinked product thereof is used. The above-mentioned organic polymer resin is used as the high molecular weight polymer. An example of such a foamable fireproof material is disclosed in Japanese Patent Publication No. 53-24215, and specifically, a DF sheet (trade name of Mitsubishi Cable Industries, Ltd.) may be used.

In the first embodiment having the above construction, the receiving member 6 is attached to the cable bundle 4 at the lower position of the lower fire protection member 5, in particular.
Is fixed so as to project in the outer peripheral direction, and the receiving member 6
Since the protruding end surface 6b on the upper side of the above is disposed so as to contact the lower end portion of the fire protection member 5, when the lower fire protection member 5 is formed by filling the fire protection seal material, the filled fire protection seal Since the material abuts on the protruding end surface 6b and is received so as to prevent further downward displacement, it is possible to particularly easily form the lower fire protection member 5, and during or after the filling operation. The fireproof member 5 can be prevented from falling and the fireproof member 5 can be reliably held. Therefore, the number of the cables 4a constituting the cable bundle 4 is 1 to 2 and the lower cable through hole 2
Even if the cable space factor is small such that the gap between the opening edge 1a and the cable bundle 4 is relatively large, it is possible to form the fire prevention member 5 formed by filling the fire prevention sealing material. It can be facilitated and ensured, and the effect of the fire-preventing member 5 such as blocking of flame through the opening between the cable through hole 2 and the cable bundle 4 and heat insulation / fire spread prevention of the cable bundle 4 itself can be reliably obtained. be able to.

Moreover, since the receiving member 6 projecting in the outer circumferential direction of the cable bundle 4 is formed by winding and fixing the tape-shaped member 6a, the receiving member 6 can be easily formed. The protruding end surface 6b that holds the fire protection member 5 on the side can be reliably formed. In addition, by adjusting the number of windings of the tape-shaped member 6a, the protrusion amount of the receiving member 6 depending on the cable space factor,
That is, the supporting area by the projecting end surface 6b can be easily enlarged and changed, and the fire-preventing member 5 can be easily and reliably formed regardless of the cable space factor.

In addition, since the tape-shaped member 6a is formed of a material having a self-bonding property, the tape-shaped members 6a wound a plurality of times are self-bonded to each other so that the receiving member 6 as a whole is integrated. It is possible to secure durability by forming a sheet, and to prevent changes with time such as deterioration of the adhesive when it is wound via an adhesive. Moreover,
The receiving member 6 can be firmly adhered and fixed to the sheath of each cable 4a forming the outer peripheral surface of the cable bundle 4. Furthermore, since the tape-shaped member 6a is formed of a flame-retardant material, the receiving member 6 itself plays the role of heat insulation and spread prevention of the cable like the fire-preventing member 5, and the fire-preventing member 5 and the receiving member 6 are integrated. As a result, the fireproof performance in the longitudinal direction of the cable can be improved, or the formation range of the fireproof member 5 can be reduced by the amount corresponding to the receiving member 6 in order to achieve a predetermined fireproof performance. Therefore, each receiving member 6
The width of the cable along the longitudinal direction of the cable may be determined from the viewpoint of the above fire protection performance.

<Second Embodiment> FIGS. 3 and 4 show a fireproof structure for a cable penetrating portion according to a second embodiment of the present invention. In the second embodiment, a vertical penetration through a floor wall 3 is provided. The present invention is applied to the case where the cable through hole 11 is formed by the circular small diameter hole 3a as a hole.

In the figure, reference numeral 12 is a fireproof member, and the fireproof member 12 is the inner peripheral surface of the cable through hole 11 and
Cable bundle 14 penetratingly arranged in this cable through hole 11
A fireproof sealant is filled in the entire annular gap between the outer periphery of the fireproof sealant. That is, the fire prevention member 12 is formed by densely filling the area between the opening edge portions on both sides of the small diameter hole 3a with the fire prevention sealing material. Note that the cable bundle 14 side of the fire protection member 12 is also filled in the slits in the valleys between the plurality of cables 14a, 14a, ... Which constitute the cable bundle 14 as in the fire protection member 5 of the first embodiment. Is desirable.

Reference numerals 13 and 13 denote receiving members, and the receiving members 13 and 13 are fixed to the outer peripheral surface of the cable bundle 14 located on the upper and lower outer sides of the fire protection member 12. Then, in each of the receiving members 13, a tape-shaped member 13a formed of a flame-retardant material having the same self-fusion property as the receiving member 6 of the first embodiment is provided on the outer peripheral surface of the cable bundle 14 at the predetermined position. It is formed by being wound a predetermined number of times, and each projecting end surface 13b on the side of the fire protection member 12 is disposed in contact with the upper and lower end surfaces of the fire protection member 12.

In the formation of the fire protection structure of the second embodiment, when the cable space factor is large, the lower receiving member 13 is first formed for the cable bundle 14 and the cable penetration is performed. After filling the fire-proof sealing material from the upper opening of the hole 11, the upper receiving member 13 is formed. The protruding end surface 13b of the lower receiving member 13 fills the fire-proof sealing material (the cable through hole). 11 is preferable in that an abutment surface is formed on the bottom of the annular gap between the cable bundle 14 and the cable bundle 14, but the present invention is not limited to this, and the space factor of the cable is large and the gap at the filling portion is narrow. Therefore, first, the fire protection member 12
After forming both ends and shaping both end surfaces, both receiving members 1
You may make it form 3 and 13. When the cable space factor is a small value, since the filling portion is relatively wide, it is easier to perform the work by forming at least the lower receiving member 13. In this case, the fireproof sealing material filled from the lower opening is held on the projecting end surface 13b of the lower receiving member 13 so that the fireproof member 12 can be held.
After the bottom portion of the fire protection member 12 is first formed, the remaining portion of the fire protection member 12 may be formed by the fire protection sealing material filled from the upper opening.

The other constructions of the fire protection structure are the first
Since it is similar to that of the embodiment, the same members are designated by the same reference numerals and the description thereof is omitted.

Also in the case of the second embodiment described above, the fireproof sealing material filled during the formation of the fireproof member 12 is prevented from further downward displacement especially by the protruding end surface 13b of the lower receiving member 13. Fireproof member 1 because it is received
The fire-preventing member 1 can be formed by facilitating the formation of the fire-preventing member 2 and preventing the fire-preventing member 12 from falling during or after the filling operation.
It is possible to surely hold the two. Therefore, regardless of the size of the cable space factor, it is possible to facilitate and ensure the formation of the fireproof member 12 formed by filling the fireproof sealant, and to connect the cable through hole 11 and the cable bundle 14 to each other. It is possible to surely obtain the effects of the above-mentioned fire-preventing member 12, that is, the flame is blocked through the opening and the heat insulation and spread prevention of the cable bundle 14 itself. Particularly, in the case of the second embodiment, since it is necessary to fill the entire gap between the cable through hole 11 and the cable bundle 14 with the fireproof sealing material in order to form the fireproof member 12, the lower receiving member. 1
The presence of the receiving member 13 is extremely useful in forming and maintaining the shape of the fireproof member 12 in that the fireproof sealant can be filled with the protruding end surface 13b of No. 3 as a base.

Moreover, since the receiving member 13 projecting in the outer peripheral direction of the cable bundle 14 is formed by winding and fixing the tape-shaped member 13a, like the first embodiment.
In addition to facilitating and ensuring the formation of the receiving member 13, the number of windings of the tape-shaped member 13a is adjusted to adjust the protrusion amount of the protruding end face 13b, so that the value of the cable space factor can be adjusted. Thus, the fire protection member 12 can be formed and held easily and reliably. In addition, the effect obtained by forming the tape-shaped member 13a with a material having self-bonding property, and the tape-shaped member 13a
The same effect as that of the first embodiment can be obtained by the fact that is formed of a flame-retardant material.

<Other Embodiments> The present invention is not limited to the first and second embodiments described above, but includes various other modifications. That is, in both the first and second embodiments, the cable through holes 2 and 11 are the floor walls 3 in both cases.
However, the present invention is not limited to this, and the cable through hole may be one that horizontally penetrates the partition wall, for example. In the case where the cable through hole penetrates the partition wall horizontally, the receiving member relatively moves the filling sealing material in the cable longitudinal direction with respect to the fireproof sealing material filled on the side where the receiving member is provided. It plays the role of a stopper to prevent, and thereby facilitates and ensures the work of forming the fireproof member. Therefore, when the cable through-hole is a horizontal through-hole, it is preferable to dispose the receiving members on both sides of the cable through-hole. The effect of the receiving member can be obtained.

In the first and second embodiments, the receiving members 6 are provided on the upper and lower sides with the cable through holes 2 and 11 interposed therebetween.
However, the present invention is not limited to this, and the receiving members 6 and 13 may be formed on at least one of the lower sides.

In the first and second embodiments, the receiving members 6 and 13 are formed by winding the tape-shaped members 6a and 13a around the cable bundles 4 and 14, but the invention is not limited to this. For example, it may be formed by sandwiching and fixing two block-shaped half-divided receiving members formed in a predetermined shape in advance from both sides of the cable bundle, or may be formed around the cable bundle by a curable putty-like material. The receiving member may be formed by forming an annular convex portion on the.

Further, as shown in the first embodiment in which the fire preventive member 5 is formed at both side opening edges 1a, 1a of the cable through hole 2, at least both side opening edges are filled with the fire preventive sealing material. The fireproof member may be formed by filling the entire cable through hole 2 with a fireproof sealant as in the second embodiment.

[0046]

As described above, according to the fire prevention structure for the cable penetrating portion in the first aspect of the present invention, at least the fire preventing member interposed between the both side edge portions of the cable penetrating hole and the cable. Since the receiving member that protrudes in the cable outer peripheral direction and contacts the outer end of the fire protection member is fixed around the outer circumference of the cable at one outer end position, the cable space factor becomes a small value to form the fire protection member. Even when a relatively large amount of the fireproof sealant is provided, the receiving member can act as a stopper that prevents relative movement of the filled fireproof sealant along the cable. Therefore, regardless of the cable space factor,
It is possible to facilitate and ensure the formation of a fire prevention member formed by filling with a fire prevention sealing material, and to block flames through the opening between the cable through hole and the cable and to insulate and spread the cable itself. The effect of the member can be surely obtained.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, since the tape-shaped member is wound around the cable, the receiving member is formed. The receiving member can be easily formed. Moreover, the thickness of the tape-shaped member protrudes in the cable outer peripheral direction, and the protruding end surface of the tape-shaped member comes into contact with the fire prevention member to prevent the fire prevention member from being supported and moved.
By adjusting the number of windings of the tape-shaped member, the supporting area of the fireproof member by the receiving member can be easily changed and adjusted according to the size of the cable space factor, and the fireproof member regardless of the cable space factor. Can be easily and reliably formed and held.

According to the invention of claim 3, since the tape-shaped member in the invention of claim 2 is formed of a material having self-bonding property, the tape-shaped members wound a plurality of times are self-adhesive. It is possible to improve the durability by fusing and forming an integral member as the whole receiving member. Moreover, since the tape-shaped member is made of a flame-retardant material, the receiving member itself plays the role of heat insulation and spread prevention of the cable as well as the fire prevention member, and the cable is shielded and insulated longer in the longitudinal direction. As a result, in order to improve the fireproof performance or to realize a predetermined fireproof performance, the formation range of the fireproof member can be reduced by the amount corresponding to the receiving member.

According to the invention described in claim 4, in addition to the effect of the invention described in claim 1, the cable through hole is formed by an electric wire tube, and the cable is arranged through the electric wire tube. Even in the structure in which the projecting ends of the conduit are respectively formed at the opening edges, the receiving member is attached to the outer end position of the one-sided fire preventive member, so that the work of filling the fire preventive sealing material is performed by the projecting of the conduit Combined with the fact that only the end portion is required, it is possible to facilitate and ensure the formation of the one side fire protection member regardless of the cable space factor.

According to the invention of claim 5, in addition to the effect of the invention of claim 1, the cable through hole is formed by a through hole, and the cable is arranged through the through hole to provide a fireproof member. Even in the structure in which the fireproof sealant is filled in the entire gap between the opening edges in the through hole, the receiving member is fixed to the outer end position on one side of the fireproof member. By the stopper function of the receiving member, the work of filling the fireproof sealing material can be easily performed, and the formation of the fireproof member can be facilitated and ensured regardless of the cable space factor.

Furthermore, according to the invention of claim 6, in addition to the effect of the invention of claim 1, the lower position of the cable through hole with respect to the cable through hole penetrating vertically through the floor wall. Since the receiving member is fixed so as to come into contact with the lower end of the fire prevention member, the filling work of the fire prevention sealing material can be easily performed by using this receiving member as a base, and the filled fire prevention sealing material can be used. It is possible to prevent the fire-preventing member from dropping during the receiving and filling operation or after forming so that the receiving member prevents further downward displacement, thereby ensuring the holding of the fire-preventing member. In particular, when the cable space factor is a small value, or when the fireproof sealing material for forming the fireproof member is relatively large, as in the case of the invention of claim 5, the self-weight is prevented. It becomes effective in holding.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG.

FIG. 3 is a vertical sectional view showing a second embodiment.

FIG. 4 is an enlarged sectional view taken along line BB of FIG. 3;

FIG. 5 is a perspective view showing a partial cross section of a conventional cable penetration portion fire prevention structure.

FIG. 6 is a vertical cross-sectional view of another conventional fire prevention structure for a cable penetration portion.

FIG. 7 is a vertical cross-sectional view of a conventional fire prevention structure for a cable penetration portion other than that shown in FIGS. 5 and 6;

[Explanation of symbols]

 1 Opening Edge 2, 11 Cable Through Hole 3 Floor Wall 3a Small Diameter Hole (Through Hole) 4 Cable Bundle (Cable) 5,12 Fire Protection Material 6,13 Receiving Member 6a, 13a Tape-shaped Member

Claims (6)

[Claims] 1. A cable is disposed through a cable through hole that penetrates through a partition wall or a floor wall of a structure, and a cable is formed between both side opening edges of the cable through hole and an outer periphery of the cable located at the both side opening edges. In a fire prevention structure of a cable penetrating portion in which a block-shaped fire preventing member is formed between the cable and the opening edge portions on both sides filled with a fire preventive sealing material in an annular gap between them, at least with the cable penetrating hole interposed therebetween. A receiving member fixed to the outer periphery of the cable at the one side position and outside the fire prevention member in the longitudinal direction of the cable is provided so as to project in the outer circumferential direction of the cable and come into contact with the outer end portion of the fire prevention member. Fireproof structure for cable penetrations. 2. The fire prevention structure for a cable penetrating portion according to claim 1, wherein the receiving member is formed by winding a tape-shaped member around the outer circumference of the cable. 3. The fire prevention structure for a cable penetrating portion according to claim 2, wherein the tape-shaped member is formed of a flame-retardant material having a self-bonding property. 4. The conduit according to claim 1, wherein a conduit is fixed to the partition wall or floor wall of the structure so as to penetrate the partition wall or floor wall and project to both sides, and the cable through hole has an inner circumference of the conduit tube. A fire prevention structure for a cable penetrating portion, wherein the fire prevention member is formed by a surface, and the fire prevention member is formed on each side of both side opening edges of the conduit. 5. The partition wall or floor wall of a structure according to claim 1, wherein a through hole is formed so as to penetrate the partition wall or floor wall, and a cable through hole is formed by an inner peripheral surface of the through hole. A fireproof structure for a cable penetrating portion, characterized in that the fireproof member is formed by densely filling a fireproof sealing material in a range between both opening edge portions of the through hole. 6. The cable through-hole according to claim 1, wherein the cable through-hole penetrates the floor wall in the vertical direction, and the receiving member abuts a lower end portion of the fire-preventing member at a lower position with the cable through-hole interposed therebetween. Fire prevention structure for cable through holes, which is fixed as follows.