JP6490766B2 - Through-hole fire prevention structure - Google Patents

Description

  The present invention relates to a through hole belonging to a fireproof structure side such as a wall or a floor, for example, a through hole formed through the fireproof structure itself or a through hole formed through a fireproof sleeve provided therethrough. The present invention relates to a through-hole fire prevention structure in which a long body such as an air conditioning pipe is inserted and a gap between an outer surface of the long body and an inner peripheral surface of the through-hole is closed with an adhesive refractory material.

  In the conventional through-hole fire prevention structure, the refractory material that closes the gap between the inner peripheral surface of the through-hole belonging to the refractory structure side and the outer surface of the elongated body falls due to aging deterioration, or the elongated body In general, a sticky refractory material having excellent adhesion to the inner peripheral surface of the through hole and the outer surface of the elongated body is used to prevent falling due to vibration propagating to the surface.

  For example, when a through-hole is formed in the refractory structure itself, a putty-like refractory material is used as an adhesive refractory material in the gap between the inner peripheral surface of the through-hole and the outer surface of the elongated body. Alternatively, a belt-like refractory material that can be wound around is filled in a close contact state (see, for example, Patent Document 1).

  In addition, when the through-hole is formed by a fireproof sleeve provided in the fireproof structure, a fireproof tape having a sticky fireproof material layer formed on one side of the tape base material is used as the fireproof material. The fireproof tape is wrapped around the outer peripheral surface of the end portion of the fireproof sleeve and the outer surface of the long body, and the sticking part of the long body side of the fireproof tape is tied to the long body from the outside with a wire. (For example, refer to Patent Document 2).

JP-A-2005-351305 JP 2007-31599 A

  In the case of the former through-hole fire prevention structure, when a moving force in the longitudinal direction acts on the long body due to an external force such as an earthquake, the refractory material in close contact with the outer surface of the long body also penetrates. There is a possibility that the fire-resistant blocking function between the inner peripheral surface of the through hole and the outer surface of the elongated body is reduced or lost due to being dragged out while being deformed with respect to the inner peripheral surface of the hole.

  Moreover, even in the case of the latter through-hole fire prevention structure, when a moving force in the longitudinal direction acts on the long body due to an external force such as an earthquake, the joining portion between the outer surface of the long body and the fireproof tape However, there is a possibility that a deformation or peeling phenomenon may occur at the joint between the fireproof tape and the fireproof tape, which have a weak bonding force, and the fire closure function between the inner peripheral surface of the fireproof sleeve and the outer surface of the elongated body may be reduced or lost. was there.

  The present invention has been made in view of the above-described actual situation, and the main problem is that even if a moving force in the longitudinal direction acts on the long body due to an external force such as an earthquake, the long body Provides a through-hole fire prevention structure that can exhibit the expected fire-resistant blocking function by maintaining the refractory material that closes the gap between the outer surface of the through-hole and the inner peripheral surface of the through-hole as much as possible in the initial state of construction. There is in point to do.

According to a first characteristic configuration of the present invention, a gap between an inner peripheral surface of a through hole belonging to the fireproof structure side and an outer surface of a long body inserted through the through hole is closed with an adhesive fireproof material. A hole fire prevention structure,
A sliding guide layer is formed between the refractory material and the outer side surface of the long body corresponding to the refractory material to allow movement of the long body relative to the refractory material in the longitudinal direction.

  According to the above configuration, the sliding guide layer formed between the refractory material and the outer surface of the elongate body when a moving force in the longitudinal direction acts on the elongate body due to an external force such as an earthquake. Thus, since the long body slides in the longitudinal direction with respect to the sliding guide layer, it is possible to suppress the movement force of the long body from acting on the refractory material.

  Therefore, even if a moving force in the longitudinal direction acts on the long body due to an external force such as an earthquake, it becomes easier to maintain the initial closed state of the refractory material due to the relative movement of the refractory material and the long body. In addition, the desired fire-resistant blocking function by the refractory material can be exhibited.

  A second characteristic configuration according to the present invention is that the sliding guide layer is formed in close contact or substantially in close contact between the refractory material and the outer surface of the elongated body.

  According to the above configuration, even when a moving force in the longitudinal direction acts on the long body due to an external force such as an earthquake, the closed state at the beginning of the construction of the refractory material is achieved by the relative movement of the refractory material and the long body. While providing a sliding guide layer for maintaining, the sliding guide layer is formed in close contact or substantially in close contact between the refractory material and the outer surface of the elongated body. The gap between the outer surface of the scale and the inner peripheral surface of the through hole can be satisfactorily closed.

  A third characteristic configuration according to the present invention is that the sliding guide layer is formed of a cylindrical body that can be packaged on a long body.

  According to the above configuration, since the entire circumference of the long body is covered with the cylindrical body constituting the sliding guide layer, the sliding guide layer is compared with the case where the sliding guide layer is formed in a part of the circumferential direction of the long body. Then, when a longitudinal moving force acts on the long body due to an external force such as an earthquake, the movement of the long body with respect to the refractory material becomes smooth, and it is easy to maintain the refractory material in the initially closed state of construction. Become.

  A fourth characteristic configuration according to the present invention is that the sliding guide layer is formed of a flexible sheet-like body that can be packaged on a long body.

  According to the above configuration, since the sliding guide layer can be formed simply by winding and mounting the sheet-like body around the long body, it is possible to efficiently and economically perform fire prevention measures for the through holes at the construction site. it can.

The longitudinal cross-sectional view which shows the construction state of the through-hole fire prevention structure of 1st Embodiment of this invention Cross-sectional view showing the construction state of the through-hole fire prevention structure of the first embodiment The longitudinal cross-sectional view which shows the construction state of the through-hole fire prevention measure structure of 2nd Embodiment Cross-sectional view showing the construction state of the through-hole fire prevention structure of the second embodiment The fracture | rupture perspective view which shows the construction state of the through-hole fire-protection structure of 3rd Embodiment The longitudinal cross-sectional view which shows the construction state of the through-hole fire prevention structure of 3rd Embodiment Expanded sectional view of the fireproof tape of the third embodiment Construction process diagram of through hole fire prevention structure of third embodiment

[First Embodiment]
In the through-hole fire prevention structure shown in FIGS. 1 and 2, one or a plurality of cables or air conditioners are formed in the through-hole 1a formed directly through the reinforced concrete wall 1 which is an example of a fireproof structure (fireproof compartment). A cable / pipe (an example of a long body) 3 such as a pipe is inserted, and an annular gap between the outer surface of the cable / pipe 3 and the inner peripheral surface of the through hole 1a has flexibility and adhesion. A heat-expandable refractory material B having a property is filled, and the refractory material B closes the gap between the outer surface of the cable / piping 3 and the inner peripheral surface of the through hole 1a.

  The refractory material B is a putty-like thermal expansibility having heat resistance, thermal expansibility, flexibility, and adhesiveness, including a resin component containing a rubber component such as polybutadiene and polybutene, and thermally expandable graphite and an inorganic filler. It is composed of the composition 4 and improves the workability of the construction, but is thermally expanded in the event of a fire, and between the outer surface of the cable / piping 3 that softens, deforms or burns, and the inner peripheral surface of the through hole 1a. While preventing a flame from flowing in through the gap, the residue after combustion does not collapse and maintains the closed state.

  And the movement of the cable / pipe 3 in the longitudinal direction with respect to the putty-like thermally expandable composition 4 between the putty-like thermally expandable composition 4 and the outer surface of the cable / pipe 3 corresponding thereto Is formed between the putty-like thermally expansible composition 4 and the outer surface of the cable / piping 3 in a close contact or substantially contact state. Yes.

  The sliding guide layer A is formed in a smooth surface having a low friction coefficient at least at the inner surface contacting the outer surface of the cable / pipe 3 at a position located in the through hole 1a of each cable / pipe 3. A flexible sliding guide sheet 5 such as a resin sheet, a resin film, paper, or the like is wound in a tightly attached state in a cylindrical shape and is held in the cylindrical body by a fastening means such as an adhesive or tape. It is comprised by.

  The sliding guide sheet 5 is wound around the insertion portion of the through hole 1a of each cable / pipe 3 in a cylindrical shape in close contact or substantially in a close contact state, and then the sliding guide sheet held in the cylindrical body The putty-like thermally expandable composition 4 is filled in an annular gap between the outer peripheral surface of the cylindrical body 5 and the inner peripheral surface of the through-hole 1a in a close contact state or a substantially close contact state.

  Since the sliding guide sheet-like body 5 is affixed to the entire adhesive surface on the inner peripheral surface side of the putty-like thermally expandable composition 4 filled in an annular shape, the adhesive force to the outer surface of the cable / piping 3 ( Adhesive force) is lost to the sliding guide sheet-like body 5 and lost.

  Moreover, since the inner surface, which is the contact surface with the cable / pipe 3 in the sliding guide sheet 5, is formed as a smooth surface with a low coefficient of friction, the cable / pipe is caused by an external force such as an earthquake. When the moving force to the drawing side or the pushing side is applied to 3, the filling state of the putty-like thermally expandable composition 4 located between the inner peripheral surface of the through hole 1a and the sliding guide sheet-like body 5 is Only the cable / pipe 3 is slidably guided with respect to the sliding guide sheet 5 while maintaining or substantially maintaining the initial state of the construction.

  In the first embodiment described above, the length of the sliding guide sheet 5 in the insertion direction of the cable / pipe 3 is set to the penetration length of the through hole 1a or the putty-like thermally expandable composition 4. The length of the sliding guide sheet-like body 5 is set to the penetration length of the through hole 1a or the putty-like thermally expandable composition. You may comprise larger or smaller than 4 filling length.

  In the first embodiment described above, the sliding guide sheet 5 is wound around the cable / pipe 3 in a cylindrical shape. You may affix on the adhesive surface of the inner peripheral surface side of the putty-like thermally expansible composition 4 with which it filled cyclically | annularly in the state which contacts a part of circumferential direction.

  Furthermore, in the first embodiment described above, the sliding guide layer a is composed of the flexible sliding guide sheet-like body 5, but this sliding guide layer A is arranged in the radial direction with respect to the cable / pipe 3. You may comprise from the hard sliding guide cylindrical body comprised from the some division | segmentation cylindrical part which can be mounted | worn from the outside.

  As the sliding guide layer A, the frictional force between the putty-like thermally expandable composition 4 and the corresponding outer surface of the cable / pipe 3 is used as the putty-like thermally expandable composition 4 and the through hole. It may be configured to be smaller than the frictional force between 1a and allow the cable / pipe 3 to move in the longitudinal direction with respect to the putty-like thermally expandable composition 4.

[Second Embodiment]
In the first embodiment described above, the sliding guide sheet 5 constituting the sliding guide layer A is wound around each of the plurality of cables / pipes 3 inserted through the through holes 1a. 3. As shown in FIG. 4, the sliding guide sheet 5 may be wound and mounted in a state in which a plurality of cables / pipes 3 inserted through the through holes 1a are bundled together.

  Also in this case, after the sliding guide sheet-like body 5 is wound in a cylindrical shape along the contour shape of the cables / pipes 3 bundled together, the outer peripheral surface of the sliding guide sheet-like body 5 The cable / pipe 3 in which the sliding guide sheet 5 is bundled together by pressing and filling the putty-like thermally expandable composition 4 into the annular gap between the inner peripheral surface of the through hole 1a. In close contact or substantially in close contact with the substantially V-shaped valley formed between adjacent portions.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

  Further, in this second embodiment, the sliding guide layer a is composed of the flexible sliding guide sheet-like body 5, but this sliding guide layer A is composed of a plurality of cables / pipings 3. It is made of a hard material that has an inner surface shape that corresponds to the contour shape when bundled, and that is composed of a plurality of divided cylindrical portions that can be attached to cables and pipes 3 bundled together from the outside in the radial direction. You may comprise from a sliding guide cylindrical body.

[Third Embodiment]
In the through-hole fire prevention structure shown in FIGS. 5 to 8, a cable / pipe 3 is inserted through a through-hole 1 a formed through a reinforced concrete wall 1 that is an example of a fireproof structure (fireproof compartment). A refractory sleeve S such as a steel conduit that forms the through hole 2 is provided in a state where both ends of the refractory sleeve protrude outward, and the outer peripheral surface of the refractory sleeve S and the through hole 1a of the reinforced concrete wall 1 Between the peripheral surfaces, a refractory filler M such as mortar is filled.

  Further, as shown in FIGS. 6 and 8, a synthetic resin or metal bushing 6 for protecting the cable / pipe 3 is fitted and fixed to both ends of the fireproof sleeve S. This is an example of an adhesive refractory material B extending over the outer peripheral surface 6a and the outer surface of the cable / piping 3 that is led out from the end of the refractory sleeve S on the side to which this is fitted and fixed. A fire-resistant tape 7 formed by forming a heat-expandable fire-resistant layer 7A on one side of the tape base 7B is wound, and the inner peripheral surface of the through-hole 2 formed by the fire-resistant sleeve S by the fire-resistant tape 7 and the cables / pipings 3 Between the outer surface and the outer surface.

  Each bushing 6 includes an external fitting cylinder portion 6A that is externally fitted to the end portion of the outer peripheral surface of the fireproof sleeve S, an internal fitting cylinder portion 6B that is internally fitted to the end portion of the inner peripheral surface of the fireproof sleeve S, and these The connecting part 6C connects both 6A and 6B in a state of bypassing the end face of the fireproof sleeve S, and the inner fitting cylinder part 6B is configured to be longer than the outer fitting cylinder part 6A.

  As shown in FIG. 7, the refractory tape 7 is made from a resin composition containing an aluminum foil as a tape base material 7B and a resin component mainly composed of butyl rubber, thermally expandable graphite, and an inorganic filler on one surface thereof. The putty-like heat-expandable fire-resistant layer 7A having heat resistance, heat-expandability, flexibility and adhesiveness is formed.

  The adhesive surface 7a constituted by the surface of the heat-expandable fire-resistant layer 7A of the fire-resistant tape 7 is affixed to the outer peripheral surface 6a of the outer fitting cylinder portion 6A of the bushing 6 constituting the outer peripheral surface on one end side of the fire-resistant sleeve S. 1 affixed to the affixing area W1 and the second affixing area W2 that is affixed to the part from the outer end surface 6b of the connecting portion 6C of the bushing 6 to the outer surface of the cable / piping 3 It consists of 3rd sticking area | region W3.

  As shown in FIGS. 7 and 8, there is a putty-like space between the third affixing region W3 of the thermally expandable refractory layer 7A of the refractory tape 7 and the outer surface of the cable / piping 3 corresponding thereto. A sliding guide layer A that allows movement of the cable / pipe 3 in the longitudinal direction (the drawing side and the pushing side) with respect to the fireproof tape 7 is formed. The sliding guide layer A is a putty-like thermally expandable composition 4. Between the cable and the outer surface of the cable / pipe 3.

  The sliding guide layer A is formed in a smooth surface with a low friction coefficient at least on the inner surface in contact with the outer surface of the cable / piping 3 in the third affixing region W3 of the heat-expandable fire-resistant layer 7A of the fire-resistant tape 7. A flexible sliding guide sheet body 8 such as a resin sheet, a resin film, paper, or the like is attached.

  Since the sliding guide sheet 8 is attached to the entire area of the third application region W3 on the adhesive surface 7a of the fireproof tape 7, the adhesive force (adhesive force) to the outer surface of the cable / piping 3 is the sliding guide sheet. Lost after being robbed by the body 8.

  Moreover, since the inner surface, which is the contact surface with the cable / piping 3 in the sliding guide sheet 8, is formed on a smooth surface having a low friction coefficient, the cable / piping is caused by an external force such as an earthquake. 3, when the moving force in the longitudinal direction (particularly on the drawing side) is applied, the winding state of the outer peripheral surface of the bushing 6 on the fireproof sleeve S side and the fireproof tape 7 is maintained or substantially maintained in the initial state of construction, Only the cable / pipe 3 moves relative to the sliding guide sheet 8 attached to the third attaching region W3 of the heat-expandable fireproof layer 7A of the fireproof tape 7.

  Therefore, even if a moving force in the longitudinal direction acts on the cable / pipe 3 due to an external force such as an earthquake, the refractory tape 7 is wound by the relative movement between the fire-resistant tape 7 and the cable / pipe 3. It becomes easy to maintain the wound state at the beginning of construction, and the desired fire-resistant closing function by the fire-resistant tape 7 can be exhibited.

  A wire or a covering wire 9 which is an example of a fastening tool for binding the fireproof tape 7 to the outer surface of the cable / piping 3 is provided at a portion corresponding to the third pasting region W3 of the tape base material 7B of the fireproof tape 7. Is provided.

  The bonding force by the binding of the wire or the coated wire 9 is set to be smaller than the bonding force (adhesive force) between the adhesive surface 7a of the fireproof tape 7 and the outer peripheral surface of the bushing 6 of the fireproof sleeve S. When a moving force in the longitudinal direction is applied to the cable / piping 3 due to an external force, the initial winding state of the construction of the outer peripheral surface side of the fireproof sleeve S and the fireproof tape 7 is maintained or substantially maintained. The movement of the cable / piping 3 with respect to the fireproof tape 7 is allowed.

  In the third embodiment, the bushing 6 which is an example of an accessory member fitted and fixed to the end of the fireproof sleeve S and the outer surface of the cable / pipe 3 derived therefrom is provided. When the fireproof tape 7 is wound, but there is no attached member such as the bushing 6, the fireproof tape 7 is wound over the end portion of the outer peripheral surface of the fireproof sleeve S and the outer surface of the cable / piping 3 derived therefrom. It will be.

  In the third embodiment described above, the refractory tape 7 is wound over the bushing (attachment member) 6 integrally provided at one end of the refractory sleeve S and the outer surface of the cable / pipe 3 derived therefrom. However, the fireproof tape 7 may be wound around the bushing (attachment member) 6 at both ends of the fireproof sleeve S and the outer surface of the cable / pipe 3 derived therefrom.

  In the third embodiment described above, the sliding guide sheet body 8 is attached to the entire area of the third attaching region W3 of the adhesive surface 7a of the fireproof tape 7, and the adhesive force (adhesive force) to the outer surface of the cable / pipe 3 is attached. ), But the sliding guide sheet 8 is pasted on a part of the third pasting area W3 on the adhesive surface 7a of the fireproof tape 7, and the piping 3 is pulled to the drawing side due to an external force such as an earthquake. When the moving force is applied, only the cable / piping 3 moves relative to the refractory tape 7 while maintaining or substantially maintaining the initial winding state of the outer periphery of the refractory sleeve S and the refractory tape 7. You may comprise so that it may have the moderate adhesive force with respect to the outer surface of the cable and piping 3 under the conditions to obtain.

  In this case, the sum of the adhesive force (adhesive force) of a part of the third affixing region W3 on the adhesive surface 7a of the fireproof tape 7 and the binding force of the wire or the coated wire 9 constitutes the joining force. This total joining force is configured to be smaller than the joining force (adhesive force) between the adhesive surface 7a of the fireproof tape 7 and the outer peripheral surface of the bushing 6 of the fireproof sleeve S.

The third embodiment described above is an example of a fastener that binds the fireproof tape 7 to the outer surface of the cable / pipe 3 at a portion corresponding to the third pasting region W3 of the tape base material 7B of the fireproof tape 7. Although the wire or the coated wire 9 is provided, a metal chain or the like may be used.
Moreover, you may implement in the form which abundant fasteners, such as a wire which binds the fireproof tape 7 to the outer surface of the cable and piping 3, were abbreviate | omitted.

  In the third embodiment described above, the refractory tape 7 is wound around the outer peripheral surface on the end side of the refractory sleeve S and the outer surface of the cable / piping 3 derived therefrom. An annular clearance between the part side and the outer surface of the cable / pipe 3 facing the part side may be filled with a putty-like refractory material having adhesiveness and flexibility.

[Other Embodiments]
(1) In the above-described embodiment, the through-hole fire prevention structure of the reinforced concrete wall 1 has been described. ) Wall or floor, or a hollow wall made of gypsum board.

  (2) Conventionally, various refractory compositions can be used as the refractory material having adhesiveness.

  (3) In the above-described embodiment, the sliding guide layer A is composed of a sheet-like body or a hard sliding guide cylindrical body having a divided structure, but the contact of the refractory material B that comes into contact with the outer surface of the long body 3. The sliding guide layer A may be configured by applying a smoothing agent that forms a smooth surface upon curing to the surface.

A Sliding guide layer B Refractory material 1 Refractory structure (reinforced concrete wall)
1a Through-hole 2 Through-hole 3 Long body (cable / piping)
4 Thermally expandable composition (refractory material)
5 Sheet (sliding guide sheet)
7 Fireproof tape (refractory material)
8 Sheet (sliding guide sheet)

Claims (8)

The gap between the inner peripheral surface of the through hole belonging to the fireproof structure side and the outer surface of the long body inserted through the through hole is formed on the inner peripheral surface of the through hole using an adhesive fireproof material. A through-hole fire-protection structure that is closed in a state of close contact or close contact ,
Between the refractory material and the corresponding outer surface of the elongated body, a sliding guide layer that allows movement in the longitudinal direction of the elongated body relative to the refractory material is formed,
The sliding guide layer is composed of a sheet-like body having a low friction surface having a smaller coefficient of friction than the surface of the refractory material, and an inner peripheral surface of the refractory material filled in the through hole in an annular shape. A through-hole fire prevention structure provided between the outer surface of the elongated body so that the adhesive force of the refractory material is lost and the low friction surface faces inward. A through-hole fire prevention structure in which a gap between an inner peripheral surface of a through hole belonging to the fire-resistant structure side and an outer surface of a plurality of elongated bodies inserted through the through-hole is closed with an adhesive refractory material. ,
Between the refractory material and the corresponding outer surface of the elongated body, a sliding guide layer that allows movement in the longitudinal direction of the elongated body relative to the refractory material is formed,
The sliding guide layer is composed of a sheet-like body having a low friction surface having a smaller coefficient of friction than the surface of the refractory material, and an inner peripheral surface of the refractory material filled in the through hole in an annular shape. Between the outer surface of the elongated body is provided such that the adhesive force of the refractory material is lost and the low friction surface faces inward ,
The sliding guide layer is wound in a cylindrical shape along the contour shape of a bundle of a plurality of elongated bodies, and the two elongated bodies adjacent to each other by the refractory material to be pressed and filled. A through-hole fire prevention structure that enters the valley between the two . The through-hole fire prevention structure according to claim 1 or 2 , wherein the sliding guide layer is provided in close contact or substantially in close contact between the inner peripheral surface of the refractory material and the outer surface of the elongated body. The through-hole fire-protection measure according to any one of claims 1 to 3, wherein the sheet-like body constituting the sliding guide layer has flexibility and is configured to be externally mounted on the elongated body. Construction. The through-hole fire prevention structure according to any one of claims 1 to 4 , wherein the sliding guide layer is attached to an inner peripheral surface of the refractory material. A plurality of the elongated bodies are provided,
The sliding guide layer is wound in a cylindrical shape along the contour shape of a bundle of a plurality of elongated bodies, and the two elongated bodies adjacent to each other by the refractory material to be pressed and filled. The through-hole fire prevention structure according to claim 1 , which enters a valley between the two. Wherein the refractory material is one containing a resin component and a thermally expandable graphite and an inorganic filler containing a rubber component, from claim 1, which consists of putty intumescent composition comprising an adhesive 6 The through-hole fire prevention structure according to claim 1. The gap between the inner peripheral surface of the through-hole formed in the fire-resistant sleeve placed in the through-hole of the fire-resistant structure and the outer surface of the long body inserted through this is closed with an adhesive fire-resistant material. Through-hole fire prevention structure,
The adhesive refractory material is wound around the refractory sleeve and the elongated body around the end of the refractory sleeve,
Between the refractory material and the corresponding outer surface of the elongated body, a sliding guide layer that allows movement in the longitudinal direction of the elongated body relative to the refractory material is formed,
The sliding guide layer is composed of a sheet-like body having a low friction surface having a smaller friction coefficient than the surface of the refractory material, and the longitudinal direction of the refractory material is longer than the end of the refractory sleeve. Between the part located outside and the outer side surface of the elongated body corresponding thereto, the adhesive force of the refractory material is lost and the low friction surface is provided in an inward state. Through-hole fire prevention structure.

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