JP4933412B2 - Thermally expansible fireproofing equipment and fireproof structure - Google Patents

Description

  The present invention relates to a thermally expandable fireproof device to be mounted between a penetration part formed on a floor or wall for a fire prevention compartment of a building and a wiring / pipe material inserted into the penetration part, and the thermal expansion fireproofing The present invention relates to a fireproof structure using tools.

  2. Description of the Related Art Conventionally, a through-hole is formed in a fire prevention compartment wall in order to allow wiring / piping materials to penetrate through a wall for a fire prevention compartment in a building (hereinafter referred to as a fire prevention compartment wall). And the fireproof division wall is provided with the fireproof structure between the through-hole and the wiring / pipe material. This fireproof structure is provided, for example, to prevent the inflow of flame, smoke, or toxic gas to the other side through the through-hole when a fire or the like occurs on the front side of one wall across the fire prevention partition wall. It has been. In other words, the fire-resistant structure is configured to prevent inflow of flame, smoke, and toxic gas to the other side by closing between the through hole and the wiring / piping material when a fire or the like occurs. As such a fireproof structure, for example, a structure using a fireproof sleeve disclosed in Patent Document 1 can be cited.

  The fireproof sleeve disclosed in Patent Document 1 includes a substantially cylindrical steel sleeve main body, and a flange plate that is attached to the opening end of the sleeve main body and temporarily fixes the sleeve main body to the peripheral wall surface of the through hole. . The sleeve body is formed in a substantially cylindrical shape by combining a pair of sleeve pieces formed so as to bisect the diameter of the sleeve body. Further, the overlapping positions of the sleeve pieces are slidably fixed so that the diameter of the sleeve body matches the diameter of the through hole. The flange plate is mounted on the sleeve body by assembling a pair of plate pieces to the sleeve piece.

  In order to provide a fireproof structure on the fireproof compartment wall using the fireproof sleeve, a pair of sleeve pieces are combined to form a cylindrical sleeve body, and the diameter of the sleeve body is adjusted to the diameter of the through hole. Next, a pair of sleeve main bodies are inserted from both sides of the through hole, and the insertion end portions are overlapped inside the through hole to adjust the length of the sleeve main body to the length of the through hole. Next, the flange plate provided on the sleeve main body is brought into contact with the wall surface and fixed. After that, the thermal expansion fireproof pack (thermal expansion material) is filled around the wiring / pipe material inserted into the sleeve main body, and the thermal expansion fireproof pack is fixed in the sleeve main body using a metal fitting. A fireproof structure comprising a fireproof sleeve and a thermally expandable fireproof pack is provided on the fireproof compartment wall.

  According to this fireproof structure, for example, when a fire or the like occurs on one wall front side of the fireproof partition wall, the heat-expandable fireproof pack expands due to the heat, but the sleeve body moves to the outer surface side of the heat-expandable fireproof pack. The expansion of is suppressed. For this reason, the thermally expandable fireproof pack expands toward the inner surface side, that is, the wiring / piping material, and closes between the through hole and the wiring / piping material. Therefore, the flow of flame, smoke, and toxic gas to the other side through the through hole is prevented.

  However, in the fireproof structure using the fireproof sleeve disclosed in Patent Document 1, after the fireproof sleeve is inserted into the through hole, a thermally expandable fireproof pack is provided around the wiring / pipe material inserted into the fireproof sleeve. The operation | work which fills was required and the operation | work which provides a fireproof structure was troublesome. Moreover, since it is necessary to combine a pair of sleeve pieces with the fireproof sleeve, the work of forming the fireproof sleeve is also necessary, and the work of providing the fireproof structure is very troublesome.

  Therefore, as in Patent Document 1, it can be arranged around the wiring / piping material without assembling the divided body (sleeve piece), and a thermal expansion material (thermal expansion fireproof pack) is provided around the wiring / piping material. There has been proposed a structure capable of forming a fireproof structure without filling (for example, see Patent Document 2). The fire prevention section through-hole measure member (hereinafter simply referred to as a measure member) of Patent Document 2 is formed by forming a plurality of tongue pieces inside a cylindrical thermal expansion material, and is divided in the longitudinal direction. It is formed so as to be deformable into a C-shaped cross section.

And in order to provide a fireproof structure in a fire prevention division wall using the measure member of patent document 2, this measure member is covered on piping using the split of the measure member outside the through hole, and then the measure member is penetrated. Push into the hole. Then, while piping is hold | maintained by the front-end | tip of a some tongue piece, a fireproof structure is provided in a fire prevention division wall by the measure member itself. And according to this fireproof structure, for example, when a fire or the like occurs on the front side of one wall of the fire prevention compartment wall, the measure member itself expands toward the pipe due to the heat, and the gap between the measure member and the wiring / pipe material. Close. Therefore, the flow of flame, smoke, and toxic gas into the other side through the inside of the measure member is prevented.
JP 2006-234140 A JP 2004-313393 A

  However, since the fireproof structure using the measure member disclosed in Patent Document 2 has a small thickness along the radial direction of the measure member (the length in the direction perpendicular to the axial direction of the measure member), A gap is formed between the surface and the outer peripheral surface of the measure member, and when the measure member is heated, the measure member tends to expand toward both the inside and outside in the radial direction. Therefore, in order to suppress the expansion of the measure member toward the outside and prevent the fire from spreading, it is necessary to fill the outer peripheral side of the measure member with mortar, and the work of providing a fireproof structure on the fire prevention compartment wall is very troublesome. Met. Furthermore, the measure member of Patent Document 2 can be used when a fireproof structure is provided on a wall (concrete wall) that can be filled with mortar so as to surround the entire outer peripheral surface side of the measure member. Since the hollow portion is formed in the wall, it cannot be used for the wall (hollow wall) where there are places where the mortar cannot be filled.

  The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to be able to be used regardless of the structure of a wall or floor for a fire prevention compartment, and to facilitate the work of providing a fireproof structure. An object of the present invention is to provide a thermally expandable fireproof tool and a fireproof structure using the thermally expandable fireproof tool.

  In order to solve the above problems, the invention according to claim 1 is provided between a penetration part formed in a wall or floor for a fire prevention compartment of a building and a wiring / piping material inserted in the penetration part. A heat-expandable fireproof device to be mounted, which is made of a heat-expandable material capable of maintaining its own shape, and is inserted into the through-hole and has a cylindrical shape, through which the wiring / piping material can be inserted. A thickness of the thermal expansion portion that expands in a direction perpendicular to the axial direction of the refractory main body by heating with heat generated by a fire or the like as the thickness of the refractory main body. The thickness of the maintaining portion that maintains the shape of the other peripheral surface side of the refractory main body during expansion of the thermal expansion portion is secured to the one peripheral surface side of the heated side in The gist is secured.

  According to a second aspect of the present invention, in the thermally expandable fireproof device according to the first aspect, the fireproof main body includes a wall or floor for the fire protection compartment in a state in which the fireproof main body is inserted into the penetration portion. The gist of the present invention is that a flange contacting the periphery of the through portion on the front side is provided by integral molding.

  According to a third aspect of the present invention, in the thermally expandable fireproof device according to the second aspect, the fireproof main body and the flange extend along the entire axial direction of the fireproof main body, and the outer surface of the fireproof main body. The gist is that a slit connecting the side and the outer peripheral end of the flange and the insertion hole is formed.

  According to a fourth aspect of the present invention, in the thermally expandable fireproof device according to any one of the first to third aspects, a plurality of tongues that cover the insertion hole so as to be openable and closable are provided in the fireproof tool body. The gist is that the piece is provided by integral molding.

  According to a fifth aspect of the present invention, in the thermally expandable fireproof device according to any one of the first to fourth aspects, the wall for the fire protection compartment is erected so as to sandwich the intermediate column. The gist of the present invention is a hollow wall comprising a pair of partition walls and a hollow portion formed between the pair of partition walls.

  A sixth aspect of the present invention is the thermally expandable fireproof device according to any one of the first to fifth aspects, wherein the outer peripheral surface of the fireproof device main body has a whole axial direction of the fireproof device main body. The gist is that a plurality of concave stripes and convex stripes extending along the circumferential direction of the refractory body are formed.

  The invention according to claim 7 is the thermally expandable fireproof device according to any one of claims 1 to 6, wherein the thermally expandable material is a thermally expandable rubber having rubber elasticity. Is the gist.

  The invention according to claim 8 is the thermally expansible fireproof device according to claim 7, wherein the fireproof body has a cylindrical shape, the insertion hole has a circular shape, and the fireproof body has a radial direction. The gist is that the thickness along is set thicker than the value of the ratio of the expansion coefficient of the thermally expandable rubber to the radius of the insertion hole.

  The invention according to claim 9 is the invention according to any one of claims 1 to 8 between the penetration part formed in the wall or floor for the fire prevention section of the building and the wiring / piping material inserted into the penetration part. The gist of the invention is that the thermally expandable fireproof device according to any one of the above items is mounted, and the shape of the outer surface of the fireproof device main body is formed substantially the same as the shape of the penetrating portion.

  The gist of the invention according to claim 10 is that, in the fireproof structure according to claim 9, the heat-expandable fireproof device is mounted in the penetration portion from both sides of the wall for the fireproof compartment. .

  ADVANTAGE OF THE INVENTION According to this invention, while being able to use regardless of the structure of the wall or floor for fire prevention compartments, the operation | work which provides a fireproof structure can be made easy.

(First embodiment)
DESCRIPTION OF EMBODIMENTS Hereinafter, a first embodiment of a thermally expandable fireproof tool and a fireproof structure embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a thermally expandable fireproof tool 11 is formed by integrally molding a fireproof tool body 12 formed in a cylindrical shape and a flange 13 extending from one end edge of the fireproof tool body 12. is there. The heat-expandable refractory 11 (the refractory body 12 and the flange 13) is formed of a heat-expandable rubber as a heat-expandable material. This heat-expandable rubber is mixed with an expanded material (expanded graphite) whose volume expands more than twice that before heating when it receives heat of 300 ° C or higher, and is added to the rubber that has been molded into a predetermined shape (after the molding process). It is obtained through a sulfurization process. The vulcanization step is a step of applying heat to the rubber that has undergone the molding step to cause a vulcanization (crosslinking) reaction or an adhesion reaction to obtain a product having rubber elasticity. And the thermally expansible fireproof tool 11 is maintaining cylindrical shape (shape) with thermally expansible rubber itself.

  In the thermally expandable fire retardant 11, a circular insertion hole 20 is formed inside the fire retardant body 12 so as to penetrate the fire retardant body 12. In the refractory body 12, the direction through which the insertion hole 20 passes is defined as the axial direction of the refractory body 12. In the refractory main body 12, a flange 13 extending along the radial direction of the refractory main body 12 from one end edge along the axial direction is formed in the entire circumferential direction of the refractory main body 12. The flange 13 has a thin plate shape. The thermally expandable fire-resistant tool 11 is formed with a slit 14 that extends over the entire axial direction of the fire-resistant tool body 12 and extends in a direction (radial direction) orthogonal to the axial direction. The slit 14 connects the outer surface side of the refractory main body 12 and the outer peripheral end of the flange 13 and the insertion hole 20 so that the insertion hole 20 can be opened to the outside of the thermally expandable refractory 11.

  As shown in FIG. 2, the refractory main body 12 is formed with a closing portion 16 that closes the insertion hole 20 on one end side in the axial direction of the refractory main body 12. As shown by a two-dot chain line in FIG. 2, when the wiring / pipe material 33 is inserted into the closing portion 16, the closing portion 16 is divided into a plurality of pieces to form a plurality of tongue pieces 16 a. . That is, a plurality of tongue pieces 16a extending toward the center of the insertion hole 20 are formed on one end side of the refractory body 12 at the periphery of the insertion hole 20, and each tongue piece 16a has rubber elasticity. ing. The slit 14 is one of a plurality of cuts and is used to form the tongue piece 16a. When the wiring / piping material 33 is not inserted into the insertion hole 20, the closing portion 16 closes the insertion hole 20, and when the wiring / piping material 33 is inserted into the insertion hole 20, the closing portion 16 is deformed. However, it is in close contact with the outer surface of the wiring / piping material 33 (see FIG. 5).

  As shown in FIG. 1, on the outer peripheral surface of the refractory main body 12, a plurality of concave stripes 17 extend over the entire axial direction of the refractory main body 12 and are equally spaced along the circumferential direction of the refractory main body 12. Is formed. And between the concave strips 17 adjacent to the circumferential direction of the refractory main body 12, a plurality of ridges 18 extend over the entire axial direction of the refractory main body 12 and along the circumferential direction of the refractory main body 12. It is formed at equal intervals.

  As shown in FIGS. 1 and 3, in the fireproof body 12 having a cylindrical shape, the thickness of the fireproof body 12 along the radial direction of the fireproof body 12 is set to a required thickness. The refractory main body 12 secures the thickness of the thermal expansion part 12b that expands in the radial direction of the refractory main body 12 on the one peripheral surface (inner peripheral surface) side of the refractory main body 12 by heating with heat generated by a fire or the like. is doing. Moreover, the fireproof main part 12 has ensured the thickness of the external shape maintenance part 12a which maintains the shape of the other peripheral surface (outer peripheral surface) side in the fireproof main part 12 at the time of expansion | swelling of the thermal expansion part 12b on the outer peripheral surface side. Therefore, the thickness of the refractory main body 12 is set to such a thickness that the heat does not affect the outer peripheral surface side from the inner peripheral surface of the refractory main body 12 even if the inner peripheral surface side of the refractory main body 12 is heated. ing. That is, the thickness of the refractory main body 12 is such that when the refractory main body 12 is heated from the inner peripheral surface side, the thickness of the thermal expansion portion 12b is set on the inner peripheral surface side of the refractory main body 12 and the outer shape maintaining portion 12a is set on the outer peripheral surface side. In addition, when heated from the outer peripheral surface side, the thickness of the thermal expansion portion is secured on the outer peripheral surface side of the refractory body 12 and the thickness of the inner shape maintaining portion is secured on the inner peripheral surface side.

  For this reason, the thickness of the refractory main body 12 is the sum of the thickness of the outer shape maintaining part 12a and the thickness of the thermal expansion part 12b. In the refractory main body 12, when the thermal expansion portion 12 b receives heat from the inner peripheral surface of the refractory main body 12, a gap is formed between the inner peripheral surface of the refractory main body 12 and the outer surface of the wiring / pipe material 33. It is a site that is hermetically closed, and a site other than the thermal expansion portion 12b in the refractory main body 12 serves as an outer shape maintaining portion 12a.

  In this embodiment, the thickness of the refractory main body 12 is set with the thickness of the outer shape maintaining portion 12a and the thickness of the thermal expansion portion 12b being the same, and ½ of the thickness of the refractory main body 12 is maintained. A portion 12a is used, and ½ of the thickness of the refractory body 12 is a thermal expansion portion 12b. That is, when a fire or the like occurs, the heat expands from the inner peripheral surface of the refractory main body 12 to ½ of the thickness by receiving the heat, and from the outer peripheral surface of the refractory main body 12 to ½ of the thickness, The shape does not change without being affected by heat from the surface side and without expanding. In the event of a fire or the like, the heat and the heat-resistant body 12 is expanded by half the thickness of the fire-resistant body 12, so that the gap between the wiring and piping material 33 is hermetically closed and the heat is transferred to the outer periphery of the fire-resistant body 12. Propagation to is prevented.

  Therefore, a portion from the inner peripheral surface of the refractory main body 12 to ½ of the thickness is defined as a thermal expansion portion 12b, and the remaining ½ is defined as an outer shape maintaining portion 12a. Further, the thickness of the refractory main body 12 is set to be thicker than the value of the ratio of the expansion coefficient of the thermally expandable rubber to the radius of the insertion hole 20. Further, the thickness of the refractory body 12 is constant along the circumferential direction of the refractory body 12. In this embodiment, the thickness of the refractory main body 12 is 20 mm, 10 mm is secured as the thickness of the outer shape maintaining part 12a, and 10 mm is secured as the thickness of the thermal expansion part 12b.

  Here, the hollow wall as the wall for the fire protection compartment where the thermally expandable fireproof tool 11 having the above-described configuration is installed will be described. As shown in FIG. 5, the hollow wall W includes a plurality of standing pillars 30 (only one stud 30 is shown in FIG. 5), and a plurality of partition walls standing so as to sandwich the stud 30. (Gypsum board) 31 and the like. A hollow portion 32 is formed between a pair of partition walls 31 opposed to each other with the interposition 30 interposed therebetween. In the hollow wall W, a penetrating portion 34 for penetrating the wiring / pipe material 33 is formed. The through portion 34 is formed by a circular through hole 31 a formed in each partition wall 31 and the hollow portion 32. The diameter of the through hole 31a is formed to be substantially the same (slightly larger) as the outer diameter of the refractory main body 12, and the shape (circular shape) of the outer peripheral surface of the refractory main body 12 is the shape of the through hole 31a in the through portion 34. It is almost the same as (circular).

  The hollow wall W is capable of penetrating the wiring / pipe material 33 through the hollow wall W through both the through holes 31 a and the hollow portion 32. The wiring / piping material 33 is a general term for wiring (control cables, coaxial cables, optical cables, etc.) and piping materials (synthetic resin flexible cable tubes, steel cable tubes, etc.) arranged in a building. It is.

  In order to provide the fireproof structure T on the hollow wall W using the heat-expandable fireproof tool 11 having the above-described configuration, first, as shown in FIG. The wiring / pipe material 33 is made to penetrate. In the first embodiment, the wiring / pipe material 33 is a cable in which a metal core wire is covered with a coating. Next, two thermally expandable fire retardants 11 are prepared, the thermally expandable fire retardant 11 is expanded from the slit 14 in each thermally expandable fire retardant 11, and the insertion hole 20 is extended to the entire axial direction of the fire retardant body 12. Open over. Then, the wiring / pipe material 33 is passed through the slit 14 outside the hollow wall W, and the wiring / pipe material 33 is accommodated in the insertion hole 20. At this time, the thermally expandable refractory 11 is attached to the wiring / pipe material 33 so that the end of the refractory main body 12 opposite to the flange 13 faces the through portion 34. Thereafter, the expanded state of the thermally expandable fire retardant 11 is released, and the refractory body 12 is closed. Then, the heat-expandable refractory 11 is attached to the outer surface side of the wiring / pipe material 33. At this time, the closing portion 16 is divided into a plurality of tongue pieces 16 a and comes into contact with the outer surface of the wiring / pipe material 33.

  Subsequently, the thermally expandable fire retardant 11 is slid along the wiring / piping material 33 toward the through hole 31a, and the refractory body 12 side of the thermally expandable fire retardant 11 is inserted into each through hole 31a. Furthermore, if the flange 13 is brought into contact with the wall surface around the through hole 31a located on both sides of the partition wall 31, further penetration of the thermally expandable fireproof tool 11 into the through hole 31a is prevented. And if the flange 13 and the wall surface of the partition wall 31 are adhere | attached with an adhesive tape or an adhesive agent, the two heat-expandable fireproof tools 11 will be installed in the hollow wall W, as shown in FIG. In addition, the installation of the heat-expandable fire retardant 11 on the hollow wall W is performed by applying a flame-resistant putty from the flange 13 to the wall surface of the partition wall 31 and by embedding the flange 13 in the putty, You may carry out by adhering to the hollow wall W.

  In addition, when the thermally expandable refractory 11 is installed by sliding the thermally expandable refractory 11 along the wiring / piping material 33 as described above, the plurality of tongue pieces 16 a are heated along the wiring / piping material 33. It deform | transforms so that it may protrude outward from the expansible fireproof tool 11. FIG. For this reason, after installing the heat-expandable refractory 11 on the hollow wall W, the plurality of tongue pieces 16a are elastically deformed into the insertion hole 20 so as to be in close contact with the outer surface of the wiring / pipe material 33, and inserted. The hole 20 is prevented from opening toward the outside of the hollow wall W. A recess is formed in the end surface of the thermally expandable fireproofing tool 11 due to the deformation of the tongue piece 16a toward the insertion hole 20, and the recess 39 is filled with a sealing material 39 made of flame-retardant putty. To do.

  Then, when the thermally expandable fire retardant 11 is inserted from both the through holes 31 a of the partition wall 31 to be paired, the tips of the refractory body 12 come into contact with each other in the hollow portion 32. Then, the insertion holes 20 of the two thermally expandable fireproof devices 11 communicate with each other, and the hollow wall W passes through from one surface side (one partition wall 31 side) to the other surface side (the other partition wall 31 side). A hole is formed. Then, the thermally expandable fire-resistant tool 11 is mounted between the peripheral surface of the through-hole 31a (penetrating portion 34) and the outer surface of the wiring / pipe material 33, and the wiring / pipe material 33 passes through the hollow wall W. The fireproof structure T is provided in the hollow wall W. A slight gap is formed between the outer surface of the wiring / pipe material 33 inserted into the insertion hole 20 and the inner peripheral surface of the refractory main body 12. Further, the ridges 17 and the ridges 18 formed on a part of the outer peripheral surface of the refractory main body 12 are exposed toward the hollow portion 32.

Next, the effect | action of the fireproof structure T of the hollow wall W formed using the thermally expansible fireproof tool 11 of the said structure is demonstrated.
Now, as shown in FIG. 5, in a building in which the fireproof structure T is provided on the hollow wall W, a fire or the like occurs on one side of the hollow wall W (left side in FIG. 5). It is assumed that the coating on one side of the wall W burns and the core wire is exposed. Then, the heat propagated through the wiring / piping material 33 propagates through a gap between the outer surface of the wiring / piping material 33 and the inner peripheral surface of the refractory main body 12. Due to the propagated heat, the refractory main body 12 is heated mainly from the inner peripheral surface side which is one peripheral surface side thereof, and the thermal expansion portion 12b in the refractory main body 12 is heated. At this time, in the refractory main body 12, heat does not propagate to the outer peripheral surface side which is the other peripheral surface side of the refractory main body 12 even if the thermal expansion portion 12b is heated. For this reason, even if the thermal expansion part 12b expand | swells, the external shape of the refractory main body 12 is maintained by the external shape maintenance part 12a.

  As shown in FIG. 6, the heated thermal expansion portion 12b expands radially inward of the through hole 31a, that is, toward the wiring / piping material 33, and the wiring / piping material 33 and the inner peripheral surface of the refractory main body 12 are expanded. A gap between them is filled, and the space between the inner peripheral surface of the refractory body 12 and the outer surface of the wiring / pipe material 33 is hermetically closed. At this time, the entire thermal expansion portion 12b of the refractory main body 12 located on one side of the hollow wall W that is the fire generation side expands, and the thermal expansion of the refractory main body 12 located on the other side of the hollow wall W occurs. As for the part 12b, the one surface side of the hollow wall W expand | swells. The gap between the outer surface of the wiring / pipe material 33 and the inner peripheral surface of the refractory main body 12 becomes a path for heat and smoke, and heat and smoke are transferred to the other side of the hollow wall W (right side in FIG. 5). There will be no inconvenience of being transmitted.

  The expansion of the thermal expansion portion 12b prevents heat from being propagated to the gap between the inner peripheral surface of the refractory main body 12 and the outer surface of the wiring / pipe material 33, so that the refractory main body 12 It is not heated from the surface side. Therefore, heat does not propagate to the outer shape maintaining part 12a in the refractory main body 12, and the outer shape maintaining part 12a is not easily heated. Then, the outer shape maintaining portion 12a does not expand toward the hollow portion 32, the outer shape (cylindrical shape) of the refractory main body 12 is maintained, and the state inserted in the through portion 34 is maintained. That is, even when a part of the refractory main body 12 is exposed to the hollow portion 32 of the hollow wall W, the refractory main body 12 is prevented from expanding toward the hollow portion 32. As a result, only the thermal expansion part 12b can be expanded toward the wiring / piping material 33, and the gap is quickly sealed and closed by the thermal expansion part 12b.

  Further, a plurality of concave stripes 17 and convex stripes 18 are formed on the outer peripheral surface of the refractory main body 12 along the circumferential direction of the refractory main body 12. For this reason, the surface area of the external shape maintenance part 12a exposed to the hollow part 32 is increased as compared with the case where the concave stripes 17 and the convex stripes 18 are not formed. For this reason, the heat propagated to the external shape maintaining part 12a is radiated to the hollow part 32, and the external shape maintaining part 12a is prevented from being in a high temperature state.

According to the above embodiment, the following effects can be obtained.
(1) In the heat-expandable fireproof tool 11, the thickness of the heat-expandable part 12b and the thickness of the outer shape maintaining part 12a were secured as the thickness of the fireproof tool body 12. For this reason, when the refractory main body 12 is heated, the outer shape maintaining portion 12a maintains the outer shape of the refractory main body 12 while the thermal expansion portion 12b is expanded, and the expanded thermal expansion portion 12b causes the wiring / pipe material 33 to be expanded. And the refractory body 12 can be hermetically sealed. Therefore, the fire-resistant structure T can be provided on the hollow wall W simply by inserting the thermally expandable fire-resistant tool 11 into the through portion 34. Therefore, in order to install the fireproof structure T, the fireproof structure is compared with the background technology that requires the work of filling the thermally expandable fireproof pack around the wiring / pipe material after inserting the fireproof sleeve into the through hole. The operation of providing T can be facilitated.

  (2) In the heat-expandable fire resistance 11, the gap between the wiring / pipe material 33 and the fire resistance body 12 can be hermetically sealed by the expanded thermal expansion portion 12b, and the outer diameter of the fire resistance body 12 And the diameter of the through hole 31a are substantially the same, and the through portion 34 is prevented from being a path for heat and smoke. Therefore, it is not necessary to fill mortar or the like between the outer peripheral surface of the refractory main body 12 and the through hole 31a, and the refractory structure T is formed on the hollow wall W only by inserting the thermally expandable refractory 11 into the through portion 34. Can be provided.

  (3) Moreover, the fire-resistant body 12 in the heat-expandable fire-resistant tool 11 is formed by molding a heat-expandable rubber into a cylindrical shape. That is, the thermally expansible fireproof tool 11 of this embodiment is not formed by assembling a plurality of members. Therefore, the installation of the fireproof structure T can be facilitated as compared with the case where the fireproof sleeve used for providing the fireproof structure T is formed by assembling a pair of sleeve pieces as in the background art.

  (4) In the heat-expandable fireproof tool 11, since the heat does not propagate to the outer shape maintaining part 12a on the outer peripheral surface side even when the refractory main body 12 is heated from the inner peripheral surface side, the outer shape maintaining part 12a is expanded by heating. As a result, the refractory body 12 is prevented from expanding to the outer peripheral side. For this reason, only the thermal expansion part 12b in the refractory main body 12 will expand, and the thermal expansion part 12b can be expanded at a stretch toward the inner peripheral side. Therefore, the clearance gap existing between the wiring / piping material 33 and the inner peripheral surface of the refractory body 12 can be quickly sealed and closed.

  (5) The refractory body 12 and the flange 13 are integrally formed of thermally expandable rubber. For this reason, compared with the case where the flange 13 is provided separately from the refractory main body 12, the production of the thermally expandable refractory 11 can be simplified.

  (6) The thickness of the refractory main body 12 is constant along the circumferential direction of the refractory main body 12. For this reason, when the refractory main body 12 is uniformly heated in the circumferential direction, the thermal expansion portion 12b is uniformly expanded, and a gap exists between the wiring / pipe material 33 and the inner peripheral surface of the refractory main body 12. Can be quickly sealed and closed.

  (7) The thickness of the refractory main body 12 is set to be thicker than the value of the ratio of the expansion coefficient of the thermally expandable rubber to the radius of the insertion hole 20. For this reason, even if the thermal expansion part 12b is heated, heat hardly propagates to the external shape maintaining part 12a, and expansion of the external shape maintaining part 12a can be avoided.

  (8) The refractory main body 12 and the flange 13 are formed with slits 14 extending over the entire axial direction of the refractory main body 12 and connected to the insertion hole 20. For this reason, the refractory body 12 and the flange 13 can be divided by the slit 14, and the wiring / pipe material 33 can be accommodated from the divided portion into the insertion hole 20. Therefore, even after the wiring / pipe material 33 is inserted through the through-hole 34, the thermally expandable fire-resistant tool 11 can be attached to the wiring / pipe material 33. Therefore, providing the slit 14 in the thermally expandable fireproof tool 11 can contribute to facilitating the installation work of the fireproof structure T using the thermally expandable fireproof tool 11.

  (9) In the heat-expandable fireproof tool 11, when the wiring / pipe material 33 is inserted into the closing portion 16, a plurality of tongue pieces 16a are formed, and the insertion holes 20 can be closed by the tongue pieces 16a so as to be opened and closed. Even when the wiring / pipe material 33 is inserted into the insertion hole 20, the gap between the outer surface of the wiring / pipe material 33 and the inner peripheral surface of the refractory body 12 is closed by the tongue piece 16 a, and the gap is hollow. Exposure to the outside of the wall W is prevented. As a result, it is possible to prevent the appearance of the hollow wall W from being deteriorated due to the exposed gap and the passage of wind through the gap.

  (10) In the hollow wall W, a hollow portion 32 is formed between the paired partition walls 31. And the through-hole 31a is formed only in the partition wall 31, and the outer peripheral surface of the refractory body 12 is exposed in the hollow portion 32. However, by ensuring the thickness of the outer shape maintaining part 12a and the thermal expansion part 12b as the thickness of the fireproof body 12, the outer peripheral side of the fireproof body 12 can be maintained even if a part of the fireproof body 12 is exposed to the hollow portion 32. The expansion toward the hollow portion 32 is prevented, and only the inner peripheral side of the fireproof body 12 can be expanded. Therefore, the thermally expandable fireproof tool 11 of the present embodiment can be used to provide the fireproof structure T on the hollow wall W, and a sleeve for preventing the expansion of the thermally expandable material toward the hollow portion 32 is also required. Neither is it necessary to fill mortar between the penetrating part 34. Therefore, in the case of providing the fireproof structure T on the hollow wall W, the thermally expandable fireproof tool 11 of the present embodiment can surely exhibit the effect of facilitating the work of providing the fireproof structure T compared to the background art. it can.

  (11) On the outer peripheral surface of the refractory body 12, a plurality of recesses 17 and ridges 18 extending in the axial direction of the refractory body 12 are formed along the circumferential direction of the refractory body 12. For this reason, compared with the case where the concave stripe 17 and the convex stripe 18 are not formed, the surface area of the outer shape maintaining portion 12a exposed to the hollow portion 32 can be increased, and the outer shape maintaining portion 12a to the hollow portion 32 can be increased. Heat dissipation can be improved. As a result, the outer shape maintaining part 12a can be prevented from becoming high temperature, the expansion of the outer shape maintaining part 12a can be prevented, and the outer shape of the refractory main body 12 can be reliably maintained by the outer shape maintaining part 12a.

  (12) The heat-expandable fire-resisting tool 11 is formed from a heat-expandable rubber, and the heat-expandable rubber is mixed with an expansion material whose volume expands to twice or more of that before heating when receiving heat of 300 ° C. or higher. A rubber molded into a shape (through a molding process) is subjected to a vulcanization process. Therefore, while being able to expand the thermal expansion part 12b reliably with the heat | fever of a fire etc., the refractory main body 12 can be made deformable.

  (13) The heat-expandable fireproof tool 11 is formed with a plurality of elastically deformable tongue pieces 16a. The plurality of tongue pieces 16 a are deformed so as to protrude outward from the thermally expandable fire-resistant tool 11 when the thermally expandable fire-resistant tool 11 is slid along the wiring / pipe material 33, and the insertion hole 20. When it is pushed in, it deforms so as to be recessed from the end face of the thermally expandable refractory 11. For this reason, since the recess is formed by the elastically deformed tongue piece 16a around the wiring / pipe material 33 on the end face of the heat-expandable fire resistance 11, the heat-expandable fire resistance 11 and the wiring / pipe material 33 It is possible to facilitate the work of filling the sealing material 39 between the two.

(Second Embodiment)
Next, a second embodiment of a thermally expandable fireproof tool and fireproof structure embodying the present invention will be described with reference to FIGS. Note that in the second embodiment described below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and redundant description thereof is omitted or simplified.

  As shown in FIG. 7, in the thermally expandable fireproof tool 11 of the second embodiment, the concave line 17 and the convex line 18 are not formed on the fireproof body 12, and the outer peripheral surface of the fireproof body 12 is circumferential. Is formed. Moreover, in the refractory main body 12, the thickness along the radial direction of the refractory main body 12 is set to a required thickness, and is set to the same thickness as the refractory main body 12 of the first embodiment.

  In the second embodiment, the heat-expandable fireproof tool 11 is formed between a circular hole-shaped through part 41 formed in the floor 40 for the fire prevention compartment and the wiring / pipe material 33 inserted into the through-hole 41. It is attached to. The diameter of the penetration part 41 is formed to be substantially the same (slightly larger) as the outer diameter of the refractory body 12, and the shape (circular) of the outer peripheral surface of the refractory body 12 is substantially the same as the shape (circular) of the penetration part 41. It has become.

  Now, in order to provide the fireproof structure T on the floor 40 using the thermally expandable fireproof tool 11 of the second embodiment, first, the upper side of the floor 40 with respect to the wiring / pipe material 33 penetrating the floor 40 in the vertical direction. On the outer side of the wiring / pipe material 33 (front side), the heat-expandable refractory 11 is attached. Subsequently, the thermally expandable fire retardant 11 is slid along the wiring / pipe material 33 toward the penetration part 41, and the refractory body 12 side of the thermally expandable fire resistance 11 is inserted into the penetration part 41. Furthermore, when the flange 13 is brought into contact with the wall surface around the penetration part 41 located on the upper side (front side) of the penetration part 41, further penetration into the penetration part 41 of the thermally expandable fire-resistant tool 11 is prevented.

  Further, the tongue piece 16a that protrudes outward as the sliding movement of the thermally expandable refractory 11 into the through portion 41 is elastically deformed into the insertion hole 20 so that the insertion hole 20 is formed on the hollow wall W. Do not open to the outside. A recess is formed in the end surface of the thermally expandable fireproofing tool 11 due to the deformation of the tongue piece 16a toward the insertion hole 20, and the recess 39 is filled with a sealing material 39 made of flame-retardant putty. To do.

  Then, as shown in FIG. 8, the heat-expandable fireproof tool 11 is installed on the floor 40. Then, the thermally expandable fireproof tool 11 is mounted between the peripheral surface of the penetration part 41 and the outer surface of the wiring / pipe material 33, and the wiring / pipe material 33 is disposed so as to penetrate the floor 40. Is provided with a fireproof structure T. A slight gap is formed between the outer surface of the wiring / pipe material 33 inserted into the insertion hole 20 and the inner peripheral surface of the refractory main body 12.

  Now, as shown in FIG. 8, in a building where the floor 40 is provided with a fireproof structure T, when a fire or the like occurs on one side of the floor 40 (the lower side in FIG. 8), the peripheral surface of the through-hole 41 and the fireproof Heat generated by a fire or the like propagates through a gap between the outer peripheral surface of the tool body 12 and the refractory main body 12 is heated from the outer peripheral surface side. As shown in FIG. 9, the heated outer peripheral surface side expands toward the radially outer side of the through portion 41. Therefore, the outer peripheral surface side (one peripheral surface side) of the refractory main body 12 becomes a thermal expansion portion 12d that expands in a direction orthogonal to the axial direction of the refractory main body 12 by heating with heat generated by a fire or the like. And by expansion | swelling of the thermal expansion part 12d, while between the outer peripheral surface of the refractory main body 12 and the peripheral surface of the penetration part 41 is sealed, the clearance gap between the outer peripheral surface of the refractory main body 12 and the penetration part 41 is sealed. Becomes a path of heat and smoke, and there is no inconvenience that heat and smoke are transmitted to the upper side (front side) of the floor 40.

  When the thermal expansion portion 12d expands outward, heat is not transferred from the outer peripheral surface side of the refractory main body 12 to the inner peripheral surface side of the refractory main body 12, and the inner peripheral surface of the refractory main body 12 The side does not expand toward the wiring / piping material 33, and the inner shape (cylindrical shape) of the fireproof body 12 is maintained. Therefore, the inner peripheral surface side of the refractory main body 12 serves as an inner shape maintaining portion 12c that maintains the inner peripheral shape (the shape of the other peripheral surface) of the refractory main body 12 when the thermal expansion portion 12d is expanded. That is, as the thickness of the refractory main body 12, the thermal expansion portion 12d is secured on the outer peripheral surface side of the refractory main body 12 so as to expand when the refractory main body 12 is heated from the outer peripheral surface side. The thickness of the inner shape maintaining portion 12c that maintains the shape of the inner peripheral surface side of the refractory main body 12 during the expansion of 12d is secured on the inner peripheral surface side.

  Then, it is assumed that the coating of the wiring / pipe material 33 burns and the core wire is exposed after the thermal expansion portion 12d expands. Then, the heat generated by the fire or the like is transmitted through the core wire and propagates through the gap between the outer surface of the wiring / pipe material 33 and the inner peripheral surface of the refractory main body 12. Then, the refractory body 12 is heated mainly from the inner peripheral surface side by the propagated heat. As shown in FIG. 10, because the thermal expansion portion 12d does not expand further radially outward due to contact with the peripheral surface of the penetration portion 41, the inner shape maintaining portion 12c is radially inward of the penetration portion 41, That is, it quickly expands toward the wiring / piping material 33, and the space between the inner peripheral surface of the refractory body 12 and the outer surface of the wiring / piping material 33 is hermetically closed. Therefore, the inner shape maintaining part 12c functions as a thermal expansion part after the thermal expansion part 12d expands, and the thermal expansion part 12d functions as a maintenance part. And the clearance gap between the outer surface of the wiring and piping material 33 and the inner peripheral surface of the refractory main body 12 becomes a path of heat and smoke, and there is no inconvenience that heat and smoke are transmitted to the upper side (front side) of the floor 40.

Therefore, according to the second embodiment, in addition to the same effects as (2), (3), (5) to (9), (12) and (13) of the first embodiment, the following effects Can be obtained.
(14) At the time of expansion of the thermal expansion portion 12d, the inner shape maintaining portion 12c can maintain the inner shape of the fireproof body 12, and after the thermal expansion portion 12d abuts on the peripheral surface of the penetration portion 41, The inner shape maintaining portion 12 c expands toward the wiring / pipe material 33. And when one peripheral surface side of the refractory main body 12 expands, heat does not propagate to the other peripheral surface side of the refractory main body 12 and does not expand. Therefore, it is possible to quickly close the gap to be expanded by concentrating heat on the expanding side.

In addition, you may change the said embodiment as follows.
○ In the first embodiment, the concave stripes 17 and the convex stripes 18 may be deleted.
In the first embodiment, when the fireproof structure T is provided on the concrete wall, ALC, block wall, or other fireproof wall as the fireproof wall, the thermally expandable fireproof tool 11 of the first embodiment is used. It may be used.

In each embodiment, the closing portion 16 may be cut to form the tongue piece 16a in advance.
In each embodiment, a flange made of a metal material or the like may be assembled and provided to the refractory main body 12 on which the flange 13 is not formed.

In the first embodiment, the heat-expandable fire-resistant tool 11 may be formed by only the fire-resistant tool body 12, and the flange 13 may be omitted.
In the first embodiment, the thermally expandable fire retardant 11 is installed with the tips of the refractory main bodies 12 in contact with each other in the hollow portion 32, but the tips of the refractory main bodies 12 are separated from each other. You may install the heat-expandable fireproof tool 11. FIG.

  As shown in FIG. 11, the length in the axial direction of the refractory body 12 in the thermally expandable refractory 11 may be the same as the thickness of the partition wall 31. In the state where the thermally expandable fire retardant 11 is inserted into the through hole 31 a from the both partition walls 31 side, the ends of the refractory body 12 are not in contact with each other in the hollow portion 32.

In the first embodiment, the number of the heat-expandable refractory 11 inserted into the penetrating part 34 may be one inserted into the through-hole 31a from the front side of any one of the hollow walls W.
In each embodiment, the refractory body 12 may not be cylindrical but may be a square tube.

In each embodiment, the slit 14 may be deleted. In this case, after inserting the thermally expandable fire-resistant tool 11 into the through portions 34 and 41, the wiring / pipe material 33 is inserted into the insertion hole 20.
In each embodiment, after the heat-expandable refractory 11 is slid along the wiring / piping material 33 toward the through portions 34 and 41, it protrudes outward from the end face of the heat-expandable refractory 11. The plurality of tongue pieces 16a and the wiring / pipe material 33 may be wound with an adhesive tape, and the wiring / pipe material 33 may be fixed to the thermally expandable fire-resistant tool 11. In this case, the gap between the outer surface of the wiring / pipe material 33 and the tongue piece 16a is sealed by the adhesive tape.

  In each embodiment, the heat-expandable refractory 11 may be mounted in the through portions 34 and 41 as follows. First, the thermally expandable fire retardant 11 is inserted into the through portions 34 and 41, and the thermally expandable fire retardant 11 is expanded from the slit 14 within the through portions 34 and 41. Then, the expanded slit 14 is filled with a flame retardant putty to maintain the expanded state of the thermally expandable refractory 11, and the outer peripheral surface of the thermally expandable refractory 11 (the heat of the first embodiment). In the inflatable fire retardant 11, the end face of the ridge 18) is brought into pressure contact with the peripheral surfaces of the through portions 34 and 41. Then, the heat-expandable fireproof tool 11 is attached to the through-holes 34 and 41 without forming a gap between the heat-expandable fire-resistant tool 11 and the through-holes 34 and 41, and the heat-expandable fire-resistant tool 11 is pressed against the heat-expandable fire-resistant tool 11. As a result, the heat-expandable refractory 11 is fixed in the through portions 34 and 41.

  In each embodiment, the thermally expandable material forming the thermally expandable refractory 11 may be a material in which an inorganic material and an expandable material are mixed into a synthetic resin material. Examples of the synthetic resin material include soft synthetic resins such as an olefin resin, a vinyl chloride resin, and an ethylene-vinyl acetate copolymer resin (EVA). The inorganic material is calcium carbonate, and the expansion material is expanded graphite. Can be mentioned. As such a heat-expandable material, for example, a synthetic resin material that is adjusted at a ratio of 40% of the total weight of the heat-expandable material, 40% of the inorganic material, and 20% of the expandable material is used. .

  In the first embodiment, the thickness of the outer shape maintaining part 12a and the thickness of the thermal expansion part 12b are between the outer surface of the wiring / pipe material 33 inserted into the insertion hole 20 and the inner peripheral surface of the refractory main body 12. You may change arbitrarily according to the magnitude | size of the clearance gap formed in this. That is, when a fire or the like occurs, the gap between the outer surface of the wiring / pipe material 33 and the inner peripheral surface of the refractory main body 12 is hermetically closed by the thermal expansion portion 12b, and the outer shape maintenance portion 12a does not expand, If the outer shape is maintained, the thicknesses of the outer shape maintaining part 12a and the thermal expansion part 12b may be arbitrarily changed.

  In the second embodiment, the thickness of the inner shape maintaining portion 12c and the thickness of the thermal expansion portion 12d are determined between the outer surface of the wiring / pipe material 33 inserted into the insertion hole 20 and the inner peripheral surface of the refractory main body 12. You may change arbitrarily according to the magnitude | size of the clearance gap formed in between.

  In the thermally expandable fireproof tool 11, the position of the thermal expansion part and the maintaining part in the fireproof body 12 need not be specified. That is, the thickness of the refractory main body 12 is ensured on the one peripheral surface on the heated side, the thickness of the thermal expansion portion that expands in the radial direction of the refractory main body 12 by heating with heat generated by a fire or the like, The thickness of the maintenance part which maintains the shape of the other peripheral surface side in the refractory main body 12 at the time of expansion | swelling of a thermal expansion part should just be ensured on the other peripheral surface side. Therefore, when the refractory main body 12 is heated from the inner peripheral surface side, the inner peripheral surface side of the refractory main body 12 becomes a thermal expansion portion and the outer peripheral surface side becomes an outer shape maintaining portion that maintains the outer shape, and the outer peripheral surface of the refractory main body 12 When heated from the side, the outer peripheral surface side of the refractory main body 12 becomes a thermal expansion portion, and the inner peripheral surface side becomes an inner shape maintaining portion that maintains the inner shape.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(1) The thickness of the refractory main body is such that when the refractory main body is heated from the inner peripheral surface side, the thickness of the thermal expansion portion is secured on the inner peripheral surface side of the refractory main body, and the thickness of the maintenance portion on the outer peripheral surface side. The thickness of the thermal expansion portion is secured on the outer peripheral surface side of the refractory main body and the thickness of the maintenance portion is secured on the inner peripheral surface side when heated from the outer peripheral surface side. 8 is a thermally expansible fireproofing tool.

The perspective view which shows the thermally expansible fireproof tool of 1st Embodiment. The figure which shows the flange side of the thermally expansible fireproof tool of 1st Embodiment. Sectional drawing which shows the thermally expansible fireproof tool of 1st Embodiment. The perspective view which shows the state before mounting | wearing a heat-expandable fireproof tool to wiring and piping material. Sectional drawing which shows the fireproof structure using a thermally expansible fireproof tool. Sectional drawing which shows the state which the thermal expansion part expanded. The perspective view which shows the thermally expansible fireproof tool of 2nd Embodiment. Sectional drawing which shows the fireproof structure using a thermally expansible fireproof tool. Sectional drawing which shows the state which the thermal expansion part expanded. Sectional drawing which shows the state which the inner peripheral side of the refractory main body expanded. Sectional drawing which shows another example of a thermally expansible fireproof tool.

Explanation of symbols

  T ... Fireproof structure, W ... Hollow wall as a wall for fireproof compartment, 11 ... thermally expandable fireproof tool, 12 ... fireproof body, 12a ... outer shape maintaining part as maintaining part, 12b, 12d ... thermally expanding part, 12c ... inner shape maintenance part as maintenance part, 13 ... flange, 14 ... slit, 16a ... tongue piece, 17 ... concave, 18 ... projection, 20 ... insertion hole, 30 ... intermediate column, 31 ... partition wall, 32 ... hollow 33, wiring / piping material, 34, 41 ... penetrating part, 40 ... floor for fire protection compartment.

Claims (10)

A thermally expandable fireproof device to be mounted between a penetration part formed in a wall or floor for a fire prevention compartment of a building and a wiring / piping material inserted into the penetration part,
It is made of a thermally expansible material that can maintain its own shape, and is inserted into the through-hole, and has a fireproof body that has a cylindrical shape and has an insertion hole through which the wiring and piping material can be inserted.
As the thickness of the refractory main body, the thickness of the thermal expansion portion that expands in a direction orthogonal to the axial direction of the refractory main body by heating due to heat generated by a fire or the like is one of the heated side of the refractory main body. A heat-expandable fire-resistant tool that is secured on the peripheral surface side and that has a thickness of a maintaining portion that maintains the shape of the other peripheral surface side of the refractory body at the time of expansion of the thermally-expandable portion on the other peripheral surface side.   The flange of the said fireproofing equipment main body is provided by integral molding in contact with the circumference | surroundings of the penetration part in the wall or floor of the said fire protection compartment in the state which this fireproofing equipment main body was inserted in the penetration part. The heat-expandable fireproof device described in 1.   The refractory body and the flange are formed with slits extending over the entire axial direction of the refractory body and connecting the outer surface side of the refractory body and the outer peripheral end of the flange and the insertion hole. 2. A heat-expandable fireproof device according to 2.   The thermally expandable fireproof device according to any one of claims 1 to 3, wherein a plurality of tongue pieces that cover the insertion hole so as to be openable and closable are provided in the fireproof tool body by integral molding.   The wall for the fire protection compartment is a hollow wall formed of a partition and a pair of partition walls erected so as to sandwich the partition, and a hollow portion is formed between the pair of partition walls. The thermally expansible fireproof tool as described in any one of Claims 1-4.   6. The outer peripheral surface of the refractory main body is formed with a plurality of ridges and ridges extending along the entire axial direction of the refractory main body along the circumferential direction of the refractory main body. The thermally expansible fireproof device as described in any one of them.   The thermally expandable fireproof device according to any one of claims 1 to 6, wherein the thermally expandable material is a thermally expandable rubber having rubber elasticity.   The refractory body has a cylindrical shape and the insertion hole has a circular shape, and the thickness along the radial direction of the refractory body is a value of a ratio of an expansion coefficient of the thermally expandable rubber to a radius of the insertion hole. The thermally expandable fireproof device according to claim 7, which is set to be thicker.   The thermal expansion as described in any one of Claims 1-8 between the penetration part formed in the wall or floor for fire prevention compartments of a building, and the wiring and piping material penetrated in this penetration part. A fire-resistant structure in which a fire-resistant refractory is mounted and an outer surface of the refractory main body is formed to be substantially the same as the shape of the penetrating portion.   The fireproof structure according to claim 9, wherein the thermally expandable fireproof tool is mounted in the penetrating portion from both sides of the wall for the fireproof compartment.

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