JP3883913B2 - Penetration structure of fireproof compartment and penetration cylinder forming the penetration structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is provided between an inner peripheral surface of a through cylinder installed in a through hole penetrating a fireproof compartment such as a wall or floor of a building and an outer peripheral surface of a cable inserted into the through cylinder. The present invention relates to a penetration structure of a fireproof compartment for rapidly expanding a fireproof material to be produced and a through cylinder that forms the penetration structure.
[0002]
[Prior art]
Conventionally, a penetration structure has been formed in the fire prevention wall in order to install a penetration member such as a pipe or cable through the fire prevention wall as a fire prevention compartment of a building. The thing disclosed by 4-95053 is known.
[0003]
In this penetration structure, a metal-made fixture is inserted as a through cylinder in a through-hole provided in a fire prevention partition wall, and a mortar is formed in the gap between the outer peripheral surface of the fixture and the inner peripheral surface of the through-hole. It is configured by being filled with rock wool or the like. In addition, a long object such as a cable is inserted into the fixture so as to pass through the fire protection partition wall, and as a refractory material between the inner peripheral surface on both ends of the fixture and the outer peripheral surface of the long object. Is filled with heat-foaming flaw resistant material.
[0004]
And, in the unlikely event that a fire occurs in a building in which the above penetration structure is formed on the fire prevention partition wall, the fire spreads between the outer peripheral surface of the fixture and the inner peripheral surface of the through hole by the mortar, rock wool, etc. , Prevents the passage of smoke. Further, the heat-foamable weatherproof material is foamed by the heat of the fire, and the inside of the fixture is sealed by the foamed heat-foamable weatherproof material. As a result, fire spread and heat propagation in the through hole are blocked, and the fire prevention effect on the fire prevention compartment wall is exhibited.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional structure, only the heat-foaming weathering material exposed from the inside of the end of the fixture to the outside is directly heated by the heat at the time of the fire. Since the mortar is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the fixture, thermal foaming is not exposed to the outside from the inside of the fixture and is located in the fire prevention partition wall. The weather resistant material is heated from the outer peripheral side by heat conducted from the end of the fixture to the central side. That is, the heat-foamable fenders positioned within the fire-proof compartment walls gradually expand later than the heat-foamable fenders exposed to the outside.
[0006]
Therefore, when the fire spread rate of the cable is high, the heat-foamable fenders located in the fire protection compartment wall expand by the heat generated by the cable spread before expanding by the heat conducted through the fixture. End up. As a result, before the cable spreads, the heat-foamable flameproof material is expanded to seal the inside of the fixture, so that the cable cannot be prevented from spreading, and the fire prevention effect in the fire protection compartment may be reduced. There was a problem that there was.
[0007]
The present invention has been made paying attention to the problems existing in the above-described prior art. The purpose of the invention is to provide a penetration structure and a penetration structure for a fireproof compartment that can rapidly expand a fireproof material located in the fireproof compartment and can effectively exert a fireproof effect in the fireproof compartment. The object is to provide a through cylinder to be formed.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a fire prevention compartment body in order to penetrate the fire prevention compartment body of the building. Vertically An insertion body is inserted into the through cylinder made of a metal material installed in the through hole that penetrates, and the through hole penetrates in a gap between the outer surface of the insertion body and the inner peripheral surface of the through cylinder. A fireproof compartment penetrating structure configured by providing a refractory material that fills and seals the cylindrical body, On the outer peripheral surface of the through cylinder, a plurality of protrusions are provided at equal intervals in the circumferential direction of the through cylinder, In the installation state in the through hole of the through cylinder, By the protrusion By separating the outer peripheral surface of the through cylinder from the inner peripheral surface of the through hole, there is a heat propagation space for propagating heat generated by a fire or the like. The width along the radial direction of the through hole is maintained at substantially the same width over the entire circumferential direction of the through hole. Formed in the through hole, Made of heat-expandable material, fire When a disaster occurs, Inflated by heat Blocks the heat propagation space A fireproof expansion material as a blocking means closes a part of the through hole in the penetration direction in the heat propagation space, and forms a blocked heat propagation space below the blocking portion. The refractory material is provided so as to protrude from the inner peripheral surface of the through hole or the outer peripheral surface of the through cylindrical body toward the heat propagation space at a position on the upper surface side and to face the opening below the through hole. Is provided on the heat propagation space side of the refractory expansion material in the penetration direction of the through hole, The gist is to heat the penetration cylinder from the outer peripheral surface side by the heat propagated through the heat propagation space, and to heat and expand the refractory material by the heat conducted through the penetration cylinder.
[0009]
The invention described in claim 2 In order to pass the insert through the fireproof compartment of the building, the insert is inserted into a through-hole made of a metal material installed in a through-hole penetrating the fireproof compartment laterally. A penetration structure of a fireproof compartment configured by providing a refractory material that fills and seals the penetration cylinder in an expanded state in a gap between an outer surface and an inner peripheral surface of the penetration cylinder, the penetration cylinder A plurality of projecting portions are provided on the outer peripheral surface of the body at intervals in the circumferential direction of the through cylinder, and in the installed state in the through hole of the through cylinder, the outer surface of the through cylinder is formed by the projecting portion. By separating the through hole from the inner peripheral surface of the through hole, the heat propagation space for propagating heat generated by a fire or the like is maintained so that the width along the radial direction of the through hole is substantially the same across the entire circumferential direction of the through hole. Formed in the through-hole and A fireproof expansion material as a blocking means for blocking the heat propagation space in an expanded state when expanded by heat in the event of a fire or the like. Propagation of heat from the inner peripheral surface of the through hole or the outer peripheral surface of the through cylinder at a position that becomes the central portion in the through direction of the through hole so as to form a blocked heat propagation space on both sides of the blocking portion It protrudes toward the space and is provided so as to face both openings of the through hole, and a part of the refractory material is provided closer to the heat propagation space than the refractory expansion material in the penetration direction of the through hole. The penetration cylinder is heated from the outer peripheral surface side by the heat propagated through the heat propagation space, and the refractory material is heated and expanded by the heat conducted through the penetration cylinder. This is the gist.
[0010]
Invention of Claim 3 in the penetration structure of the fireproof division body of Claim 1, The through cylinder further includes a blocking body that blocks an opening of the heat propagation space formed on the upper surface side of the fireproof compartment from the upper surface side of the fireproof compartment as a blocking means. This is the gist.
[0011]
The invention according to claim 4 , Contract Claim To 3 In the penetration structure of the described fire protection compartment, The said closure body is formed of the collar part which protrudes outward from the whole outer peripheral surface of the upper end part of a penetration cylinder. This is the gist.
[0012]
The invention according to claim 5 is the claim. 1-claim 4 Any one of In the penetration structure of the fire prevention compartment according to claim 2, the fireproof expansion material is an outer periphery of the penetration cylinder. On the face The gist is that it is provided.
[0013]
The invention according to claim 6 is the 5 In the penetration structure of the fire protection compartment described in The protrusion has a function of positioning the fire-resistant expansion material on the outer peripheral surface of the through cylinder. This is the gist.
[0014]
The invention described in claim 7 Claim 5 or In the penetration structure of the fire protection compartment according to claim 6, The protruding portion protrudes from the outer peripheral surface of the refractory expansion material in a non-expanding state. This is the gist.
[0015]
The invention according to claim 8 provides: In order to allow the insertion body to pass through the fire prevention compartment of the building, it is installed in a through-hole penetrating the fire protection compartment in the vertical direction, the insertion body is inserted inside, and between the outer surface of the insertion body A through cylinder that forms a penetration structure of a fireproof compartment by providing a refractory material that seals the inside in an expanded state in the gap, and the inner peripheral surface of the through hole in the installation state in the through hole The outer peripheral surface is formed to be smaller than the diameter of the through-hole so that the outer peripheral surface is separated from the outer peripheral surface, and a plurality of protrusions are provided on the outer peripheral surface at intervals along the circumferential direction of the through-tube body. The heat propagation space for propagating heat generated by a fire or the like between the inner peripheral surface of the through hole by the portion is maintained so that the width along the radial direction of the through hole is substantially the same across the entire circumferential direction of the through hole. Made of material that expands with heat When a fire or the like occurs, a fire-resistant expansion material as a blocking means for blocking the heat propagation space in an expanded state by expanding due to heat is installed in the through hole, and the upper portion of the through hole in the penetration direction in the heat propagation space And projecting from the outer peripheral surface on one end side of the through cylinder toward the heat propagation space so as to form a blocked heat propagation space below the blocking portion, and through holes A part of the refractory material is provided at a position closer to the heat propagation space than the refractory expansion material in the penetrating direction of the through hole, and the heat propagation space is Heated from the outer peripheral surface side by the propagated heat, and the refractory material is heated and expanded by heat conducted from the outer peripheral surface side. This is the gist.
[0016]
The invention according to claim 9 is: In order to allow the insertion body to pass through the fire prevention compartment of the building, it is installed in a through-hole penetrating the fire protection compartment in the lateral direction, the insertion body is inserted inside, and between the outer surface of the insertion body A through cylinder that forms a penetration structure of a fireproof compartment by providing a refractory material that seals the inside in an expanded state in the gap, and the inner peripheral surface of the through hole in the installation state in the through hole The outer peripheral surface is formed to be smaller than the diameter of the through-hole so that the outer peripheral surface is separated from the outer peripheral surface, and a plurality of protrusions are provided on the outer peripheral surface at intervals along the circumferential direction of the through-tube body. The heat propagation space for propagating heat generated by a fire or the like between the inner peripheral surface of the through hole by the portion is maintained so that the width along the radial direction of the through hole is substantially the same across the entire circumferential direction of the through hole. Made of material that expands with heat, When a disaster or the like occurs, a fireproof expansion material as a blocking means that blocks the heat propagation space in the expanded state by expanding due to heat is installed in the through hole. It projects from the outer peripheral surface of the axially central portion of the through cylinder toward the heat propagation space so as to form a heat propagation space blocked on both sides of the blocking portion, A part of the refractory material is provided on the heat propagation space side with respect to the refractory expansion material in the penetration direction of the through hole, and the outer peripheral surface is formed by the heat propagated through the heat propagation space. The refractory material is heated and expanded by heat that is heated from the side and conducted from the outer peripheral surface side. This is the gist.
[0017]
The invention according to claim 10 is the claim. 8 or claims In the penetration cylinder which forms the penetration structure of the fire protection division body of Claim 9, Resistance Fire expansion material Outside The gist is that it is provided on the peripheral surface.
[0018]
The invention according to claim 11 is the claim Item 1 In the through cylinder that forms the through structure of the fire protection compartment according to claim 0, The protrusion has a function of positioning the fire-resistant expansion material on the outer peripheral surface of the through cylinder. This is the gist.
[0019]
The invention according to claim 12 is the invention according to claim 10 or Claim 1 1 In the penetration cylinder forming the penetration structure of the fire protection compartment described, The protruding portion protrudes from the outer peripheral surface of the refractory expansion material in a non-expanding state. This is the gist.
[0020]
The invention according to claim 13 The penetration cylinder which forms the penetration structure of the fireproof division body as described in any one of Claims 8-12 WHEREIN: The said refractory material is previously provided in the inner peripheral surface. And the gist.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of a penetration structure of a fireproof compartment and a penetration cylinder forming the penetration structure embodying the present invention will be described with reference to FIGS.
[0023]
As shown in FIG. 1, the penetration structure in the fire prevention compartment wall 11 as a fire prevention compartment of a building is used to penetrate the cable 12 as an insertion body in a state where a fire prevention effect is imparted to the concrete fire prevention compartment wall 11. Is formed. That is, in the penetration structure, the cable 12 is inserted into the through cylinder 14 installed in the through hole 13 penetrating the fire protection partition wall 11 in the lateral direction, and the outer surface of the cable 12 and the inner peripheral surface of the through cylinder 14 are provided. Is formed by providing a refractory material 15 that fills and seals the inside of the through cylinder 14 in an expanded state.
[0024]
As shown in FIG. 2, the penetrating cylinder 14 forming the penetrating structure includes a cylinder main body 16 formed in a substantially cylindrical shape with a metal material. As shown in FIG. 1, the cable main body 16 includes the cable main body 16. 12 can be inserted.
[0025]
Further, the outer diameter of the cylinder body 16 is formed smaller than the diameter of the through hole 13. And in the installation state in the through-hole 13 of the penetration cylinder 14, the outer peripheral surface of the cylinder main body 16 leaves | separates from the inner peripheral surface of the through-hole 13, and concentric form with the cylinder main body 16 is formed in the space formed by the space | interval. The outer diameter of the cylinder body 16 is set so that the heat propagation space S formed is formed.
[0026]
The length of the through hole 13 in the heat propagation space S in the radial direction, that is, the width of the heat propagation space S may be set to at least 5 mm in order to efficiently propagate the heat to the inner depth of the heat propagation space S. preferable. The thickness of the heat propagation space S is not limited to at least 5 mm, and can be arbitrarily changed depending on the diameter of the through hole 13, the thickness of the fire protection partition wall 11, the outer diameter of the cylinder body 16, and the like.
[0027]
As shown in FIG. 1 and FIG. 2, projecting pieces 17 extending outward at equal intervals along the circumferential direction of the tubular body 16 are formed on the outer peripheral surface of the tubular body 16 as projecting portions. The outer diameter at the tip edge of 17 is also formed slightly smaller than the diameter of the through hole 13. In addition, the protrusion length of each protrusion 17 outward is the installation state in the through-hole 13 of the penetration cylinder 14, and even if the penetration cylinder 14 moves up and down, the protrusion 17 of the penetration hole 13 is the same. It is set so that the entire width of the heat propagation space S is maintained substantially the same by immediately contacting the inner peripheral surface. Further, a gap for forming the heat propagation space S is formed between the projecting pieces 17 along the circumferential direction of the cylinder body 16.
[0028]
Among the projecting pieces 17, a fire-resistant expansion material 18 serving as a blocking means is filled between the projecting pieces 17 that are located at the center in the length direction of the cylinder body 16 and that are adjacent along the length direction. ing. When the refractory expansion material 18 receives heat of 120 ° C. or higher, the volume expands to 3 to 5 times that before heating. Further, the refractory expansion material 18 has a laminated structure and expands by heating with an increase in the interval between layers. The outer surface of the refractory expansion material 18 is separated from the outer peripheral surface of the tube body 16 in the direction in which the layers expand. 18 is set only in the direction in which the thickness increases.
[0029]
A refractory material 15 made of the same material as the refractory expansion material 18 is preliminarily applied to the inner peripheral surface of the tube body 16. The direction in which the refractory material 15 expands is set only in the direction in which the interlayer expands in a direction in which the inner peripheral surface of the refractory material 15 is separated from the inner peripheral surface of the tube body 16 and the thickness of the refractory material 15 increases. . A plurality of locking claws 20 are formed at a plurality of locations at regular intervals on the outer peripheral surface of one end side (right end side in FIGS. 1 and 2) of the cylinder body 16.
[0030]
As shown in FIG. 1, a through cylinder 14 made of a cylinder main body 16, a refractory material 15, a projecting piece 17, and a refractory expansion material 18 is inserted into the through hole 13. It is locked to the outer surface of the fire protection compartment wall 11 which is an opening edge. Then, the tip of the projecting piece 17 located on the lower side of the cylinder main body 16 comes into contact with the inner peripheral surface of the through hole 13 so that the through cylinder 14 is installed in the fire prevention partition wall 11 and installed in the through hole 13. Is done.
[0031]
In this installed state, the projecting piece 17 maintains the heat propagation space S at substantially the same width over the entire circumferential direction, and the outer peripheral surface of the cylinder body 16 and the inner peripheral surface of the through hole 13 are separated from each other. A heat propagation space S is formed. In addition, the refractory expansion material 18 is located at the center of the through hole 13 in the through direction, and the through cylinder 14 is installed in the through hole 13 almost horizontally.
[0032]
Further, the cable 12 is inserted into the through cylinder 14 installed in the through hole 13 so that the cable 12 penetrates the fire protection partition wall 11. A slight gap is formed between the outer peripheral surface of the cable 12 inserted into the through cylinder 14 and the inner peripheral surface of the refractory material 15.
[0033]
Next, the effect | action of the penetration structure of the fire prevention division wall 11 formed using the penetration cylinder 14 of the said structure is demonstrated.
As shown in FIG. 1, in a building in which a penetration structure is formed in the fire prevention partition wall 11, a fire or the like occurs on one side (right side in FIG. 1) of the fire prevention partition wall 11, and the cable 12 is covered. Suppose the part burned. Then, heat generated by a fire or the like propagates through the heat propagation space S, and the refractory expansion material 18 is heated by the heat. At this time, the refractory expansion material 18 is provided between the inner peripheral surface of the through hole 13 and the outer peripheral surface of the through cylinder 14, and is provided in the heat propagation space S. Therefore, compared with the case where the refractory expansion material 18 is provided in the through cylinder 14, the refractory expansion material 18 is rapidly heated and expanded.
[0034]
As a result, as shown in FIG. 3, the refractory expansion material 18 expands, and the expanded refractory expansion material 18 causes the central portion on the inner peripheral surface in the penetration direction of the through hole 13 and the center of the outer peripheral surface of the through cylinder 14. The heat propagation space S located between the two parts is hermetically closed over the entire circumference. That is, the heat propagation space S becomes a path for heat and smoke, and there is no inconvenience that heat and smoke are transmitted to the other surface side (the left side surface in FIG. 1) of the fire prevention partition wall 11.
[0035]
Moreover, when the part exposed to the outside from the inside of the right end part of the penetration cylinder 14 is directly heated by the heat generated by the fire, the penetration cylinder 14 that protrudes from the outer surface of the fire prevention partition wall 11 is almost simultaneously. The outer peripheral surface of is heated by heat. Further, heat enters the through hole 13 from the heat propagation space S and further propagates through the heat propagation space S.
[0036]
At this time, since there is a gap between the projecting pieces 17 along the circumferential direction of the tube main body 16, heat propagation is not hindered by the projecting pieces 17. Then, the penetration cylinder 14 located in the fire-protection partition wall 11 by the heat propagated through the heat propagation space S and located on the center side of the penetration cylinder 14 is heated from the outer peripheral surface side, and is conducted through the penetration cylinder 14. The refractory material 15 is heated by the generated heat.
[0037]
As a result, the refractory material 15 located on the right side of the through cylinder 14 is rapidly heated and expanded not only at the portion exposed to the outside but also at the portion located within the fire protection compartment wall 11. The expanded refractory material 15 quickly fills and seals the inside of the right side of the through cylinder 14, and the cable 12 positioned in the inside is buried in the refractory material 15. Further, the refractory material 15 on the left side of the refractory expansion material 18 is heated by the heat conducted through the cylinder body 16 and expands.
[0038]
Therefore, when the cable 12 is embedded in the refractory material 15, there is no oxygen around the cable 12, and further spreading of the cable 12 in the through cylinder 14 is prevented, and in the through cylinder 14. Propagation of heat, passage of smoke and the like are prevented, and the fire prevention effect in the fire prevention partition wall 11 is exhibited.
[0039]
According to the first embodiment, the following effects are exhibited.
(1) Even if a fire occurs in a building in which a penetration structure is formed in the fire prevention compartment wall 11, heat is propagated in the through hole 13 by the heat propagation space S, and the fire prevention compartment wall 11 is located in the fire prevention compartment wall 11, The refractory material 15 that is not exposed to the outside of the through cylinder 14 can also be quickly expanded to seal the inside of the through cylinder 14. Therefore, the refractory material 15 expands before the cable 12 spreads, and the expanded refractory material 15 can prevent further spread of the cable 12, and the fire prevention effect in the fire protection section wall 11 is effective. Can be demonstrated.
[0040]
(2) The refractory expansion material 18 and the refractory material 15 are attached in advance to the outer peripheral surface and inner peripheral surface of the tube body 16. Therefore, when the penetration structure is formed in the fire prevention partition wall 11, the work of applying the fireproof expansion material 18 and the fireproof material 15 to the cylinder main body 16 at the formation site becomes unnecessary, and the time for forming the penetration structure is shortened. Can do.
[0041]
(3) The protruding piece 17 can prevent the displacement of the refractory expansion material 18 provided on the outer peripheral surface of the cylinder body 16 along the length direction of the cylinder body 16. Therefore, it is possible to maintain the state where the refractory expansion material 18 is installed at the central portion in the length direction of the through cylinder 14.
[0042]
(4) When the refractory expansion material 18 expands, the heat propagation space S can be quickly cut off, and the possibility that the through hole 13 becomes a path for heat and smoke can be eliminated. Therefore, the fire prevention effect by the fire prevention partition wall 11 can be exhibited.
[0043]
(5) The heat propagation space S can be blocked by the refractory expansion material 18 at the center of the through hole 13 in the penetration direction. Therefore, when the fireproof expansion material 18 is provided on one end side of the through cylinder 14 and a fire occurs on the end portion side where the fireproof expansion material 18 is provided, heat is generated by the expansion of the fireproof expansion material 18. The possibility that the heat propagation efficiency in the propagation space S may be reduced can be eliminated. As a result, even if a fire occurs from any end side of the through cylinder 14, the heat propagation effect by the heat propagation space S can be exhibited.
[0044]
(6) The interruption | blocking means was comprised with the refractory expansion material 18 expanded by heating. Therefore, when a fire breaks out, the refractory expansion material 18 can be quickly and reliably expanded, and the heat propagation space S can be quickly and reliably blocked.
[0045]
(7) Since the tip of the projecting piece 17 is in contact with the inner peripheral surface of the through-hole 13, it is possible to maintain a state in which the outer peripheral surface of the cylinder body 16 and the inner peripheral surface of the through-hole 13 are spaced apart by a certain width. . Therefore, the heat propagation action can be reliably exerted over the entire circumference of the heat propagation space S without causing a position where the heat propagation space S is biased and narrowed.
[0046]
(8) The refractory expansion material 18 is provided between the inner peripheral surface of the through hole 13 and the outer peripheral surface of the through cylindrical body 14, and is provided in the heat propagation space S. Therefore, compared with the case where the refractory expansion material 18 is provided in the through cylinder 14, the refractory expansion material 18 is rapidly heated and expanded. Therefore, the heat propagation space S can be quickly blocked by the refractory expansion material 18.
[0047]
(Second Embodiment)
Hereinafter, a second embodiment of the penetration structure of the fireproof compartment and the penetration cylinder forming the penetration structure embodying the present invention will be described with reference to FIGS. In addition, since 2nd Embodiment is a structure which changed only the fire prevention division body and penetration cylinder of 1st Embodiment, the detailed description is abbreviate | omitted about the same part.
[0048]
As shown in FIG. 4, the fireproof compartment in the second embodiment is a concrete fireproof compartment floor 21 formed in a building, and the fireproof compartment floor 21 has a through hole 21 a penetrating in the vertical direction. Is formed. The through cylinder 22 includes a cylinder main body 23 formed in a substantially cylindrical shape from a metal material, and is formed so that the cable 12 can be inserted into the cylinder main body 23.
[0049]
The outer diameter of the cylinder body 23 is formed smaller than the diameter of the through hole 21a. That is, the outer diameter of the cylinder main body 23 is such that when the through cylinder 22 is installed in the through hole 21a, the outer peripheral surface of the cylinder main body 23 is separated from the inner peripheral surface of the through hole 21a, and the cylinder main body 23 is placed in the separated space. And a heat propagation space S that is concentric with each other.
[0050]
As shown in FIGS. 4 to 6, claw pieces 24 projecting inwardly from the cylindrical main body 23 are formed at four equal intervals on the inner peripheral edge of one end (the upper end in FIGS. 4 to 6) of the cylindrical main body 23. Has been. As shown in FIGS. 5 and 6, a flame retardant 25 such as a putty is provided on the inner peripheral surface of one end side of the cylinder main body 23, and the claw piece 24 allows the flame retardant 25 to be removed from the cylinder main body 23. Is prevented from falling off.
[0051]
On the peripheral wall on one end side and the other end (lower end in FIGS. 4 to 6) side from the central portion of the tube main body 23, bent pieces 26 formed by bending the peripheral wall of the tube main body 23 outward are used as protrusions. A plurality of portions are provided along the circumferential direction of the tube main body 23. The outer diameter at the tip edge of each bent piece 26 is also slightly smaller than the diameter of the through hole 21a.
[0052]
Note that the protruding length of the bent piece 26 is such that the bent piece 26 is located on the inner peripheral surface of the through hole 21a even when the through cylinder 22 moves in the lateral direction in a state where the through cylinder 22 is installed in the through hole 21a. It is set so that it immediately contacts and the entire width of the heat propagation space S is maintained substantially the same.
[0053]
Further, the bent piece 26 on one end side of the tube main body 23 is formed in two steps in the length direction of the tube main body 23. And between the bending pieces 26 located in two steps, the said refractory expansion material 18 is provided as a interruption | blocking means along the circumferential direction of the cylinder main body 23. FIG. That is, the refractory expansion material 18 is positioned by the bent piece 26 so as not to move along the length direction of the cylinder body 23.
[0054]
Between the bent pieces 26 positioned on the upper end side of the tube main body 23, a locking protrusion 27 formed by bending the peripheral wall of the tube main body 23 outward is provided. Further, the refractory material 15 similar to that of the first embodiment is applied and provided on the inner peripheral surface of the cylinder main body 23.
[0055]
As shown in FIG. 4, the through cylinder 22 is inserted into the through hole 21 a, the locking protrusion 27 is locked to the opening edge of the through hole 21 a, and the through cylinder 22 is connected to the fire protection compartment floor 21. Installed. Also at this time, the bent piece 26 maintains the heat propagation space S at substantially the same width over the entire circumferential direction, and the through cylinder 22 is installed substantially vertically in the through hole 21a. Further, the cable 12 is inserted into the through cylinder 22 installed in the through hole 21 a, and the cable 12 enters the fire protection compartment floor 21.
[0056]
A slight gap is formed between the outer peripheral surface of the cable 12 and the inner peripheral surface of the refractory material 15. In the installed state of the penetration cylinder 22 on the fire prevention compartment floor 21, the heat propagation space S is formed and a penetration structure is formed. Furthermore, a fireproof expansion material 18 is provided as a blocking means at the upper part of the through hole 21a as the upper surface side of the fireproof compartment floor 21.
[0057]
Now, in the building in which the penetrating structure shown in FIG. 4 is formed on the fire prevention compartment floor 21, when a fire occurs on the lower side of the fire prevention compartment floor 21, the heat generated by the fire moves the heat propagation space S upward from the lower side. Propagate towards. Then, the refractory expansion material 18 is heated by the heat, and the refractory expansion material 18 expands as shown in FIG. And by the expanded fireproof expansion material 18, in the through-hole 21a, a part of heat propagation space S located between the upper surface side inner peripheral surface of the fire prevention division floor 21 and the upper end part of the outer peripheral surface of the through cylinder 22 Is hermetically closed. Further, the outer surface of the cable 12 protruding from the upper surface of the fire prevention compartment floor 21 is protected by the flame retardant 25.
[0058]
Furthermore, the refractory material 15 exposed to the outside from the lower end of the through cylinder 14 is directly heated by the heat generated by the fire. At almost the same time, not only the part exposed to the outside but also the part located in the fire prevention compartment floor 21 in the refractory material 15 located below the through cylinder 22 by the heat propagated in the heat propagation space S quickly. Heated and expanded.
[0059]
The expanded refractory material 15 fills and seals the lower side of the through cylinder 22 before the cable 12 spreads upward, and prevents the cable 12 from spreading. Moreover, the propagation of heat in the heat propagation space S, the passage of smoke, and the like are prevented, and the fire prevention effect on the fire prevention compartment floor 21 is exhibited.
[0060]
Therefore, according to the second embodiment, the following features can be obtained in addition to the features described in the first embodiment.
In the second embodiment, due to the expansion of the refractory expansion material 18, a part of the heat propagation space S can be hermetically cut off on the upper surface side of the fire prevention compartment floor 21. Therefore, when the refractory expansion material 18 is provided on the lower surface side of the fire prevention compartment floor 21, it is possible to eliminate the possibility that the heat propagation efficiency decreases to the entire heat propagation space S due to the expansion of the refractory expansion material 18.
[0061]
Each embodiment may be changed as follows.
-As shown in FIG. 7, you may use the penetration cylinder 33 formed combining the division bodies 31 which make a semicylindrical shape. More specifically, the divided body 31 is formed in a semi-cylindrical shape with a metal material, and the outer peripheral surface has the same projecting piece 17 as that of the first embodiment, the fireproof expansion material 18 between the projecting pieces 17 and the engagement. A nail 20 is formed. Moreover, the fireproof material 15 similar to 1st and 2nd embodiment is provided in the internal peripheral surface of each division body 31. FIG.
[0062]
And in order to form a penetration structure using the said penetration cylinder 33, after inserting the cable 12 in the through-hole 13, while inserting a pair of division body 31 in the through-hole 13, respectively, the outer periphery of the cable 12 Attach to the surface. At this time, as shown to Fig.8 (a), the flame-resistant putty 34 is filled into the clearance gap formed between the edges along the length direction of the division body 31. FIG.
[0063]
The putty 34 expands in all directions by heating. That is, it expands in the direction in which the edges of the divided body 31 spread and the direction closer to the inner peripheral surface of the through hole 13. When the through cylinder 33 is attached to the outer periphery of the cable 12 and the through cylinder 33 is installed in the through hole 13, a heat propagation space is formed between the outer peripheral surface of the through cylinder 33 and the inner peripheral surface of the through hole 13. S is formed, and a penetration structure is formed in the fire protection partition wall 11.
[0064]
When a fire occurs in a building in which a penetration structure is formed in the fire prevention partition wall 11, heat generated by the fire propagates through the heat propagation space S. 8B, as in the first embodiment, the heat propagation space S is blocked by the expansion of the refractory expansion material 18, and the inside of the through cylinder 33 is expanded by the expansion of the refractory material 15. Sealed closed.
[0065]
Due to the expansion of the refractory material 15 in the thickness direction, the distance between the outer peripheral surface of the cable 12 and the inner peripheral surface of each divided body 31 is widened, and each divided body 31 is outward so that the outer diameter of the through cylinder 33 is expanded. Extruded. At this time, the tips of the projecting pieces 17 are in contact with the inner peripheral surface of the through-hole 13, respectively, and the state where the outer peripheral surface of the divided body 31 and the inner peripheral surface of the through-hole 13 are maintained is maintained. Secured.
[0066]
In addition, since the putty 34 expands due to heat generated by the fire, the expanded putty 34 fills the gaps between the edges of the divided bodies 31. Therefore, a gap is not formed between the edges of the divided bodies 31, and a problem that the gap between the divided bodies 31 becomes a fire spread path or a smoke path can be prevented. In addition, since the through cylinder 33 can be installed in the through hole 13 even after the cable 12 is inserted into the through hole 13, the insertion of the cable 12 when the through structure is formed, It is not necessary to consider the order of construction such as installation, and workability can be improved.
[0067]
The through cylinder 33 is attached to an arbitrary position of the cable 12 before the cable 12 is inserted into the through hole 13, and the putty 34 is filled between the divided bodies 31 and then inserted into the through hole 13. It may be inserted.
[0068]
Moreover, although the putty 34 that expands in all directions is used in the gap between the divided bodies 31, the putty 34 may be expanded only in the direction in which the interval between the edges of the divided bodies 31 widens. That is, in the case where the divided bodies 31 expand outward due to the expansion of the refractory material 15, the expansion expands only in the direction in which the divided bodies 31 expand so that only the gap between the edges of the divided bodies 31 can be closed. It is good. When configured in this manner, it is possible to reduce the cost of the putty 34 as compared with the case where the putty 34 that expands in all directions is used.
[0069]
In addition, instead of the locking claw 20 of each divided body 31, a hook portion protruding outward may be formed on the entire outer peripheral surface of the divided body 31, and the hook portion may be used as a blocking means. When the buttock is used as a blocking means, the fireproof expansion material 18 may be used together or the fireproof expansion material 18 may be omitted, and the protruding piece 17 may be omitted.
[0070]
-In 1st and 2nd embodiment, the protrusion 17 and the bending piece 26 may be abbreviate | omitted, and a protrusion part may be abbreviate | omitted.
In the first and second embodiments, the refractory expansion material 18 is omitted, and through holes that penetrate the peripheral walls of the cylindrical main bodies 16 and 23 are formed at a plurality of locations along the circumferential direction of the cylindrical main bodies 16 and 23. To do. In the unlikely event that a fire occurs, the heat propagation space S may be blocked using the refractory material 15 that has passed through the through hole and expanded on the outer peripheral surface of the through cylinders 14 and 22 as a blocking means.
[0071]
-In 2nd Embodiment, it is good also as a closure body as a interruption | blocking means by forming the collar part extended outward from the whole circumferential direction of the cylinder main body 23 instead of the latching protrusion piece 27. FIG. In such a configuration, the through-hole 13 is closed from the upper side by the flange provided on the upper surface side of the fire prevention compartment floor 21, that is, the outer surface of the fire prevention compartment floor 21, with the through cylinder 22 inserted into the through-hole 13. Then, the opening of the heat propagation space S is blocked. Further, the transportability and workability of the through cylinder 22 can be improved as compared with the case where the collar portion is provided separately from the through cylinder 22. Furthermore, you may use the said collar part and the fireproof expansion material 18 together. At this time, the refractory expansion material 18 is used as the upper surface side of the fire prevention compartment floor 21, blocking the upper side of the fire prevention compartment floor 21 in the through hole 21a, and further, the upper surface of the fire prevention compartment floor 21 is closed by the flange. Note that the fire-resistant expansion material 18 may be omitted, and the blocking means may be formed only by the collar portion.
[0072]
In the second embodiment, in the state where the through cylinder 22 is installed in the through hole 21a, the upper surface opening of the heat propagation space S is closed by a closing body as a separate blocking means from the through cylinder 22. Also good. For example, an annular metal plate as a closing body may be attached to the upper surface as the outer surface of the fire protection compartment floor 21, and the opening may be closed by the metal plate. When the metal plate is used as the blocking means, the heat propagation space S may be blocked by cooperation with the refractory expansion material 18, or the refractory expansion material 18 may be omitted. When comprised in this way, while being able to exhibit the effect which interrupts | blocks a part of heat propagation space S by the interruption | blocking means reliably, the interruption | blocking means can be formed easily.
[0073]
In each embodiment, the refractory material 15 is applied in advance to the inner peripheral surfaces of the cylinder main bodies 16 and 23. However, when forming the penetration structure, the refractory material 15 is applied to the inner peripheral surfaces of the cylinder main bodies 16 and 23. Also good.
[0074]
In each embodiment, the refractory expansion material 18 is preliminarily applied to the outer peripheral surfaces of the cylinder main bodies 16 and 23. However, when the through structure is formed, the outer peripheral surfaces of the cylinder main bodies 16 and 23 or the inner peripheral surfaces of the through holes 13 are formed. A refractory expansion material 18 may be applied.
[0075]
-In 1st Embodiment, although the fireproof expansion material 18 was apply | coated to the outer peripheral surface of the center part of the cylinder main body 16, a fireproof expansion material is applied to the outer peripheral surface of the position slightly moved from the center part of the cylinder main body 16 to each edge part side. 18 may be applied. In the second embodiment, the refractory expansion material 18 is applied to the outer peripheral surface on the upper end side of the cylinder main body 23, but the refractory expansion material 18 is applied to the outer peripheral surface at a position slightly moved from the upper end of the cylinder main body 23 to the lower end side. May be.
[0076]
-You may form a penetration structure in the fire prevention division wall 11 using the penetration cylinder 35 shown in FIG. The through cylinder 35 includes a cylinder main body 36 formed in a substantially cylindrical shape from a metal material, and the cable 12 can be inserted into the cylinder main body 36. The outer diameter of the cylinder body 36 is formed smaller than the diameter of the through hole 13. A flange portion 37 extending continuously along the circumferential direction is formed as a blocking means at the central portion of the tube main body 36. A refractory material 15 is applied to the inner peripheral surfaces of both end portions of the tube main body 36. Note that no protruding portion is formed on the through cylinder 35.
[0077]
And the one end side (left end side in FIG. 9) of the penetration cylinder 35 is inserted in the through-hole 13 of the fire prevention division wall 11 from the outer side of a building, and a fixing member is attached to the opening edge part of the through-hole 13 from the said collar part 37. By fixing 38, the through cylinder 35 is installed on the fire prevention partition wall 11. At this time, the left half of the through cylinder 35 is disposed in the through hole 13, and the right half protrudes outward from the outer surface of the fire protection partition wall 11 and is exposed outdoors.
[0078]
Further, since the flange portion 37 is fixed to the fire prevention partition wall 11 by the fixing member 38, the heat propagation space S is maintained at substantially the same width over the entire circumferential direction, and the through cylinder 35 is disposed in the through hole 13. It is installed almost horizontally. Further, the cable 12 is inserted into the through cylinder 35 installed in the through hole 13, and the cable 12 is in a state of penetrating the fire protection partition wall 11.
[0079]
In the second embodiment, the flame retardant 25 may be omitted. Further, the refractory material 15 may be applied to the inner peripheral surface on one end side of the tube main body 23 instead of the flame retardant 25.
In each embodiment, the fire-resistant expansion material 18 is omitted, and the through-hole 13 is formed by using a metal ring that can block the heat propagation space S, an annular metal plate, a ring member made of a flame-retardant material, or the like as a blocking means. , 21a, and the heat propagation space S may be blocked in advance by the blocking means.
[0080]
In each embodiment, the cable 12 is embodied as an insertion body, but a wire pipe, an air-conditioning pipe, a sheath pipe, or the like may be used as the insertion body.
-In each embodiment, although the case where the refractory expansion material 18 expanded by the heat of a fire was described, the refractory expansion material 18 expand | swells not by a fire but by the heat | fever generated from the fire, smoke, etc. which ignited to oil.
[0081]
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) The present invention is characterized by being formed by combining semi-cylindrical divided bodies. 8 -Claim 1 3 The penetration cylinder which forms the penetration structure of the fireproof division body as described in any one of these. When comprised in this way, a penetration cylinder can be installed in a penetration hole, after inserting a penetration object in a penetration hole. Therefore, it is not necessary to consider the order of forming the penetrating structure, and workability can be improved.
[0083]
【The invention's effect】
As detailed above, claim 1 Or claim 2 According to the invention described in The projecting portion can secure a heat propagation space in the through hole, and prevents a problem that the outer peripheral surface of the through cylinder contacts the inner peripheral surface of the through hole or the heat propagation space is biased and narrowed. Thus, the heat propagation action can be reliably exhibited over the entire circumference of the heat propagation space along the circumferential direction of the through hole. And since the refractory expansion material protrudes into the heat propagation space and is provided so as to face the opening of the through hole, the refractory expansion material is uniformly heated and expanded over the entire area by heat generated by a fire or the like. be able to. Also, the through cylinder is heated from the outer peripheral surface side by the heat propagated through the heat propagation space, and the refractory material is heated and expanded by the heat conducted through the through cylinder, and at the same time, the refractory expansion material is heated and expanded. Can do. As a result, The fireproof material located in the fireproof compartment can be expanded quickly, and the fireproof effect in the fireproof compartment can be effectively exhibited.
[0084]
Also, Claim 1 According to the invention described in Refractory expansion material Fire protection area body Compared with the case where it is provided on the lower side, heat can be efficiently propagated in the heat propagation space.
[0085]
Also, Claim 2 According to the invention described in Refractory expansion material in the through-hole penetration direction On either end side, Refractory expansion material When a fire, etc. occurs on the end side where Refractory expansion material This can eliminate the possibility that the efficiency of heat propagation to the heat propagation space is reduced.
[0087]
Claim 3 According to the invention described in claim 1 In addition to the effects of the invention described in, the blocking means can be easily formed.
Claim 4 According to the invention described in claim 3 In addition to the effects of the invention described in (2), the transportability and workability of the through cylinder can be improved as compared with the case where the closing body is provided separately from the through cylinder.
[0089]
Claim 8 or claims According to the invention described in item 9, The projecting portion can secure a heat propagation space in the through hole, and prevents a problem that the outer peripheral surface of the through cylinder contacts the inner peripheral surface of the through hole or the heat propagation space is biased and narrowed. Thus, the heat propagation action can be reliably exhibited over the entire circumference of the heat propagation space along the circumferential direction of the through hole. And since the refractory expansion material protrudes into the heat propagation space and is provided so as to face the opening of the through hole, the refractory expansion material is uniformly heated and expanded over the entire area by heat generated by a fire or the like. be able to. Also, the through cylinder is heated from the outer peripheral surface side by the heat propagated through the heat propagation space, and the refractory material is heated and expanded by the heat conducted through the through cylinder, and at the same time, the refractory expansion material is heated and expanded. Can do. As a result, The fireproof material located in the fireproof compartment can be expanded quickly, and the fireproof effect in the fireproof compartment can be effectively exhibited.
[0091]
Claim 1 3 According to the invention described in claim 8 -Claim 1 2 In addition to the effect of the invention described in any one of the above, the formation of the penetration structure can be easily performed as compared with the case where the refractory material is provided by coating or the like at the formation location of the penetration structure.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a through structure of a first embodiment.
FIG. 2 is a perspective view showing a through cylinder of the first embodiment.
FIG. 3 is a cross-sectional view showing a state in which a refractory material and a refractory expansion material are expanded.
FIG. 4 is a cross-sectional view showing a through structure according to a second embodiment.
FIG. 5 is a perspective view showing a through cylinder of a second embodiment.
FIG. 6 is a cross-sectional view showing a state where a refractory material and a refractory expansion material are expanded.
FIG. 7 is an exploded perspective view showing another example of a through cylinder.
FIG. 8A is a cross-sectional view showing a state in which another example of the through cylinder is installed in the through hole, and FIG. 8B is a cross-sectional view showing a state in which the refractory material and the refractory expansion material are expanded.
FIG. 9 is a cross-sectional view showing a state in which a penetration structure is formed by another example of a penetration cylinder.
[Explanation of symbols]
S ... heat propagation space, 11 ... fire prevention compartment wall as fire prevention compartment, 12 ... cable as insertion body, 13, 21a ... through hole, 14, 22, 33, 35 ... penetration cylinder, 15 ... fireproof material, 17 DESCRIPTION OF SYMBOLS ... Projection piece as protrusion part, 18 ... Fireproof expansion material as interruption | blocking means, 21 ... Fireproof division floor as fireproof division body, 26 ... Bending piece as protrusion part, 37 ... Gutter part as closure body.

Claims (13)

In order to allow the insertion body to penetrate the fire prevention compartment of the building, the insertion body is inserted into a through cylinder made of a metal material installed in a through-hole penetrating the fire prevention compartment in the vertical direction . In the gap between the outer surface and the inner peripheral surface of the through-cylinder body, a penetration structure of a fire protection compartment configured by providing a refractory material that fills and seals the through-cylinder body in an expanded state,
A plurality of protrusions are provided on the outer peripheral surface of the through cylinder at intervals in the circumferential direction of the through cylinder, and the through cylinder is inserted into the through hole of the through cylinder by the protrusion in the installed state in the through hole. By separating the outer peripheral surface of the through hole from the inner peripheral surface of the through hole, the heat propagation space for propagating heat generated by a fire or the like has the same width along the radial direction of the through hole over the entire circumferential direction of the through hole. together are formed in the through hole so as to maintain the width, made of a material that expands by heat, in the event of such fire, as a blocking means for blocking the heat propagation space expanded to an expanded state by heat The fire-resistant expansion material blocks a part of the through-hole in the through-hole in the heat propagation space, and forms a blocked heat propagation space below the blocking part, The inner peripheral surface of the through hole or the outer periphery of the through cylinder at the position Projecting toward the heat propagation space and facing the opening on the lower side of the through hole, and part of the refractory material is more thermally propagated than the refractory expansion material in the through direction of the through hole. A fire prevention compartment provided on the space side, wherein the through cylinder is heated from the outer peripheral surface side by heat propagated through the heat propagation space, and the refractory material is heated and expanded by heat conducted through the through cylinder. Body penetration structure. In order to allow the insertion body to penetrate the fire prevention compartment of the building, the insertion body is inserted into the through cylinder made of metal material installed in the through hole penetrating the fire prevention compartment in the lateral direction, and the insertion body In the gap between the outer surface and the inner peripheral surface of the through-cylinder body, a penetration structure of a fire protection compartment configured by providing a refractory material that fills and seals the through-cylinder body in an expanded state,
A plurality of protrusions are provided on the outer peripheral surface of the through cylinder at intervals in the circumferential direction of the through cylinder, and the through cylinder is inserted into the through hole of the through cylinder by the protrusion when the through cylinder is installed in the through hole. By separating the outer peripheral surface of the through hole from the inner peripheral surface of the through hole, the heat propagation space for propagating heat generated by a fire or the like has the same width along the radial direction of the through hole over the entire circumferential direction of the through hole. As a blocking means that is formed in the through-hole so as to be maintained in width and is made of a material that expands by heat, expands by heat and blocks the heat propagation space in the expanded state in the event of a fire or the like The refractory expansion material blocks a part of the through-hole central portion of the through-hole in the heat propagation space, and the through-hole central portion of the through-hole so as to form a blocked heat propagation space on both sides of the blocking portion. The inner peripheral surface of the through hole or the through tube at the position Projecting from the outer peripheral surface of the through hole and facing the both openings of the through hole, a part of the refractory material is more than the refractory expansion material in the through direction of the through hole Provided on the heat propagation space side, the through cylinder is heated from the outer peripheral surface side by the heat propagated through the heat propagation space, and the refractory material is heated and expanded by the heat conducted through the through cylinder. Penetration structure of fire protection compartment. The said penetration cylinder is further provided with the obstruction | occlusion body which obstruct | occludes opening of the heat propagation space formed in the upper surface side of the fire prevention division body from the upper surface side of a fire prevention division body as a interruption | blocking means. The penetration structure of the fire protection compartment described in 1. The penetration structure of the fire protection compartment according to claim 3, wherein the closing body is formed by a flange portion protruding outward from the entire outer peripheral surface of the upper end portion of the through cylinder . The said fireproof expansion material is provided in the outer peripheral surface of a penetration cylinder, The penetration structure of the fireproof division body as described in any one of Claims 1-4 characterized by the above-mentioned. The penetration structure of the fire protection compartment according to claim 5 , wherein the protrusion has a function of positioning the fireproof expansion material on an outer peripheral surface of the penetration cylinder . Penetrating structure of the firestop material according to the projections, according to claim 5 or claim 6 protrudes from the outer circumferential surface of the refractory expanding material in a non-inflated state. In order to allow the insertion body to pass through the fire prevention compartment of the building, it is installed in a through-hole penetrating the fire protection compartment in the vertical direction, the insertion body is inserted inside, and between the outer surface of the insertion body A through cylinder that forms a penetration structure of a fireproof compartment by providing a refractory material that seals the inside in an expanded state in the gap,
  The outer diameter is smaller than the diameter of the through-hole so that the outer peripheral surface is separated from the inner peripheral surface of the through-hole in the installation state in the through-hole, and a plurality of protrusions penetrate the outer peripheral surface. A heat propagation space is provided in the radial direction of the through hole that is provided along the circumferential direction of the cylinder and that propagates heat generated by a fire or the like between the protrusion and the inner peripheral surface of the through hole. The width along the circumferential direction of the through-hole is formed so as to be maintained at substantially the same width, and is made of a material that expands by heat, and expands by heat and expands in the expanded state when a fire or the like occurs. A fire-resistant expansion material serving as a blocking means for blocking the space blocks a part of the upper portion of the through hole in the penetration direction in the heat propagation space in a state of being installed in the through hole, and is blocked below the blocking portion. Outside of one end of the through tube so as to form a heat transfer space. It protrudes from the surface toward the heat propagation space and is provided so as to face the lower opening of the through hole, and a part of the refractory material is more than the refractory expansion material in the penetration direction of the through hole. Provided at a position on the heat propagation space side, heated from the outer peripheral surface side by the heat propagated through the heat propagation space, and heated and expanded by the heat conducted from the outer peripheral surface side. A penetrating cylinder forming a penetrating structure of a fire protection compartment. In order to allow the insertion body to pass through the fire prevention compartment of the building, it is installed in a through-hole penetrating the fire protection compartment in the lateral direction, the insertion body is inserted inside, and between the outer surface of the insertion body A through cylinder that forms a penetration structure of a fireproof compartment by providing a refractory material that seals the inside in an expanded state in the gap,
The outer diameter is smaller than the diameter of the through-hole so that the outer peripheral surface is separated from the inner peripheral surface of the through-hole in the installation state in the through-hole, and a plurality of protrusions penetrate the outer peripheral surface. A heat propagation space is provided in the radial direction of the through hole that is provided along the circumferential direction of the cylinder and that propagates heat generated by a fire or the like between the protrusion and the inner peripheral surface of the through hole. The width along the circumferential direction of the through-hole is formed so as to be maintained at substantially the same width, and is made of a material that expands by heat, and expands by heat and expands in the expanded state when a fire or the like occurs. A heat-resistant expansion material as a blocking means for blocking the space blocks the central part of the through-hole in the through-hole direction in the heat propagation space when installed in the through-hole, and the heat propagation is blocked on both sides of the blocking point. Outside the axial center of the through tube so as to form a space It protrudes from the surface toward the heat propagation space and is provided so as to face both openings of the through hole, and a part of the refractory material is more thermally propagated than the refractory expansion material in the penetration direction of the through hole. Penetration of a fire protection compartment , provided on the space side, heated from the outer peripheral surface side by heat propagated through the heat propagation space, and heated and expanded by the heat conducted from the outer peripheral surface side Penetration cylinder forming structure. Through tubular body forming a penetrating structure of the firestop of claim 8 or claim 9 before Ki耐 fire expansion material and being provided on the outer peripheral surface. The penetration cylinder which forms the penetration structure of a fire protection division object according to claim 10 in which said projection part has a function which positions said fireproof expansion material on the peripheral surface of a penetration cylinder. The penetration cylinder which forms the penetration structure of the fire protection division object according to claim 10 or 11 which projects from the peripheral surface of the fireproof expansion material in a non-expanded state . The penetration cylinder which forms the penetration structure of the fireproof division body as described in any one of Claims 8-12 characterized by the above-mentioned.

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