JP2019127987A - Fire resistant structure and fireproof member - Google Patents

Abstract

To provide a fire resistant structure and a fireproof member enabling an open hole at a partition part to be closed at a faster time.SOLUTION: A fire resistant structure comprises a partition part 11 having an open hole 11a; a resin pipe body 21 inserted into an open hole 11a; and a fire resistant member 31 arranged at an outer peripheral side of the resin pipe body 21. The fire resistant member 31 comprises a heat expansion material layer 32 that is thermally expanded through heating at the time of fire. The heat expansion material layer 32 has a first end part 32a and a second end part 32b that are both end parts along an axial direction LD of the resin pipe body 21. The first end part 32a is arranged between an outer peripheral surface of the resin pipe body 21 and an inner peripheral surface of the open hole 11a. The fireproof adiabatic material layer 33 has a constitution that an outer peripheral covering part 33a covering an outer peripheral side of the heat expansion material layer 32 and a first end surface covering part 33b covering an end surface of the first end part 32a are continuous in shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fireproof structure and a fireproof member.

  2. Description of the Related Art Conventionally, there has been known a fireproof structure including a partition having a through hole, a resin pipe inserted through the through hole, and a fireproof member disposed on the outer peripheral side of the resin pipe (see Patent Document 1). ). The fireproof member in such a fireproof structure is provided with a thermal expansion material layer that expands by heating during a fire. At the time of fire, the through holes of the compartments are closed with the thermal expansion of the thermal expansion material layer, thereby suppressing the spread of fire through the through holes of the compartments.

Unexamined-Japanese-Patent No. 2017-109069

  In the fireproof structure as described above, the closure of the through hole of the compartment is also delayed with the partial delay of expansion of the thermal expansion material layer at the time of fire, for example, the smoke through the through hole is preferably suppressed. There was a risk that I could not do it.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a fireproof structure and a fireproof member capable of closing the through holes of the compartments earlier.

  A fireproof structure that solves the above problem is a fireproof structure that includes a partition portion having a through-hole, a resin pipe inserted through the through-hole, and a fire-resistant member disposed on the outer peripheral side of the resin pipe. The fire-resistant member comprises a thermal expansion material layer that thermally expands by heating during a fire, and a fire-resistant heat insulating material layer disposed on an outer peripheral side of the thermal expansion material layer, the thermal expansion material layer, It has a first end and a second end which are both ends along the axial direction of the resin pipe, and the first end is an outer peripheral surface of the resin pipe and an inner periphery of the through hole. It arrange | positions between the surfaces, and the said refractory heat insulation material layer has the structure which the outer peripheral coating | coated part which covers the outer peripheral side of the said thermal expansion material layer, and the end surface coating | coated part which covers the end surface of the said 1st end part continued.

  According to this configuration, the heat transmitted from the second end side during the fire is thermally insulated by the outer peripheral covering portion and the end surface covering portion of the fireproof heat insulating material layer, so the first end using heat transmitted from the second end side The thermal expansion of the part can be promoted. That is, delay of thermal expansion of the first end with respect to thermal expansion of the second end can be suppressed. Since the first end which thermally expands in this manner is disposed between the outer peripheral surface of the resin pipe and the inner peripheral surface of the through hole, the first end of the thermal expansion material layer is disposed in the through hole. Thermal expansion can be achieved relatively early.

In the above-mentioned fireproof structure, the end face of the second end preferably protrudes from the opening of the through hole.
According to this configuration, it becomes easy to secure a sufficient volume of the product generated from the thermal expansion material layer at the time of fire.

In the fireproof structure, the fireproof heat insulating material layer preferably has both end portions that are discontinuous in the circumferential direction of the resin tubular body.
According to this configuration, when the thermal expansion material layer thermally expands, the refractory heat insulating material layer is easily deformed so as to expand in diameter because both ends thereof can be separated. Thereby, it becomes possible to further narrow the gap between the outer peripheral surface of the fireproof heat insulating material layer and the inner surface of the through hole of the partition portion, or to closely contact the outer peripheral surface of the fireproof heat insulating material layer to the inner surface of the partition portion. .

In the above fireproof structure, the fireproof heat insulating material layer is preferably made of a sheet material containing fireproof fibers.
For example, the fireproof heat insulating material layer can be configured as described above.

  The said fireproof structure WHEREIN: The said partition part is a hollow wall which has the 1st wall part and 2nd wall part which are arrange | positioned facing each other, and the hollow part between the said 1st wall part and the said 2nd wall part The fire-resistant member includes a first fire-resistant member provided corresponding to the first wall portion and a second fire-resistant member provided corresponding to the second wall portion, and the first fire-resistant member and The second refractory members are preferably arranged such that the second end portions are on the hollow portion side of the hollow wall.

  According to this configuration, when the space on the second wall portion side becomes the fire side space among both spaces partitioned by the partition portion (hollow wall), the first fire-resistant member allows the through-hole in the first wall portion. Can be suitably closed. Moreover, when the space by the side of the 1st wall becomes a space by the side of the fire among the both spaces partitioned by the partition (hollow wall), the through hole of the second wall is suitably closed by the second fireproof member. It is possible to

In the above-mentioned fireproof structure, it is preferable that the first fireproof member and the second fireproof member are disposed independently.
Here, among the spaces on the first wall portion side and the second wall portion side, for example, when a fire occurs in the space on the second wall portion side, the second wall portion may collapse due to the heat of the fire or the like. is there. In this respect, in the above-mentioned fireproof structure, since the first fireproof member and the second fireproof member are arranged independently, even if the second fireproof member moves due to the collapse of the second wall portion, the first fireproof member. As for the member, it becomes easy to stay at the predetermined position. In addition, when a fire occurs in the space on the first wall side and the first wall collapses, the second fireproof member tends to stay at a predetermined position. That is, even when one of the first wall portion and the second wall portion collapses, the other closing function of the first fireproof member and the second fireproof member can be sufficiently exhibited.

  The fire-resistant member that solves the above-mentioned problem is a fire-resistant member that is disposed on the outer peripheral side of the resin tubular body that is inserted into the through hole of the partition part, and a thermal expansion material layer that thermally expands by heating during a fire, and A fire-resistant heat insulating material layer disposed on the outer peripheral side of the thermal expansion material layer, wherein the thermal expansion material layer is a first end and a second end which are both end portions along the axial direction of the resin pipe body It has an edge part, The said 1st edge part is arrange | positioned between the outer peripheral surface of the said resin-made pipe body, and the inner peripheral surface of the said through hole, The said fireproof heat insulating material layer is the outer periphery of the said thermal expansion material layer The outer periphery covering portion covering the side and the end surface covering portion covering the end surface of the first end portion are continuous.

  According to the present invention, it is possible to close the through hole of the partition part earlier.

It is sectional drawing which shows the fireproof structure of 1st Embodiment. It is sectional drawing which shows the part along the 2-2 line of FIG. It is sectional drawing which shows the fireproof structure after a heating. FIG. 4 is a cross-sectional view showing a portion along line 4-4 of FIG. 3; It is sectional drawing which shows the fireproof structure of 2nd Embodiment. It is sectional drawing which shows the fireproof structure of the example of a change. (A), (b) is an expanded sectional view which shows the fireproof structure of the example of a change.

First Embodiment
Hereinafter, a first embodiment of a fireproof structure and a fireproof member of the present invention will be described.
As shown in FIG.1 and FIG.2, the fireproof structure of 1st Embodiment is the partition part 11 which has the through-hole 11a, the resin-made pipe body 21 penetrated by the through-hole 11a, and the outer periphery of the resin-made pipe body 21 And a fireproof member 31 disposed on the side.

  The fireproof structure constitutes a part of the building. The partition part 11 is a wall which comprises a building, and the resin pipe body 21 comprises the building drainage system. As the material of the partition part 11, an inorganic material is preferably used, and examples thereof include concrete, mortar, ALC, and plaster. The resin tube 21 is formed from a resin material having flame retardancy (for example, a hard vinyl chloride resin).

The fireproof member 31 includes a thermal expansion material layer 32 which thermally expands due to heating at the time of fire, and a fireproof thermal insulation material layer 33 which is disposed on the outer peripheral side of the thermal expansion material layer 32.
The thermal expansion material layer 32 has a first end 32 a and a second end 32 b which are both ends along the axial direction LD of the resin tube 21. The first end 32 a of the thermal expansion material layer 32 is disposed between the outer peripheral surface of the resin tube 21 and the inner peripheral surface of the through hole 11 a. The end face of the first end portion 32a is disposed in a range of ± 40% when the total thickness of the partition portion 11 is 100% and the center in the thickness direction of the partition portion 11 is 0%. Is more preferable, and it is more preferable that they are arranged in a range of ± 30%.

  The end surface of the second end portion 32b protrudes from the opening of the through hole 11a. The entire shape of the thermal expansion material layer 32 is cylindrical in the fireproof structure before the fire, and is arranged along the outer peripheral surface of the resin tube 21.

  The thermal expansion material layer 32 can be comprised from a commercially available material. The thermal expansion material constituting the thermal expansion material layer 32 preferably contains expanded graphite which is thermally expanded by heating from the outside, and a shape stabilizer which stabilizes the shape of the expanded graphite after thermal expansion. For example, boric acid can be used as the shape stabilizer. The blending amount of the shape stabilizer to the expanded graphite is preferably 120 parts by mass or less with respect to 100 parts by mass of the expanded graphite, and 110 parts by mass or less with respect to 100 parts by mass of the expanded graphite. It is more preferable that The blending amount of the shape stabilizer with respect to the expanded graphite is preferably 70 parts by mass or more with respect to 100 parts by mass of the expanded graphite. The thermal expansion material may contain an inorganic filler, for example. The total amount of the expanded graphite and the shape stabilizing material is preferably 80% by mass or more, and more preferably 90% by mass or more when the entire thermal expansion material is 100% by mass.

  As the thermal expansion material, it is preferable to use a thermal expansion material made of powder from the viewpoint that a sufficient volume of thermal expansion can be easily obtained. In the case of a powdered thermal expansion material, it is preferable that the thermal expansion material is covered with a water-resistant layer provided with a resin film such as a polyethylene film from the viewpoint of facilitating the arrangement of the thermal expansion material. The water-resistant layer is formed, for example, in a bag shape, and the thickness dimension of the water-resistant layer is preferably smaller than the thickness dimension of the wall of the resin tubular body 21 and the thermal expansion material layer 32, specifically, 15 μm. As mentioned above, it is preferable that it is the range of 200 micrometers or less.

  When the thermally expandable material is heated from the outside to a predetermined temperature or higher, the volume becomes several to several hundred times due to the action of expanded graphite. The product generated by the thermal expansion of the thermal expansion material exhibits a heat insulating effect as well as a physical shielding effect. The expansion ratio of the thermal expansion material (thermal expansion material layer 32) is preferably 100 times or more, and more preferably 200 times or more. The expansion ratio of the thermally expandable material can be obtained from a change in volume when 1 g of the thermally expandable material is heated at 900 to 1000 ° C. for 5 minutes. Note that the upper limit of the expansion ratio of the thermal expansion material is, for example, less than 1000 times.

  The fireproof heat insulating material layer 33 has an outer periphery covering portion 33a which covers the outer peripheral side of the thermal expansion material layer 32, and a first end surface covering portion 33b which covers the end surface of the first end 32a. The refractory heat insulating material layer 33 has a configuration in which an outer periphery covering portion 33a and a first end surface covering portion 33b are continuous. The overall shape of the fireproof heat insulating material layer 33 is cylindrical in the fireproof structure before the fire, and is arranged along the outer peripheral surface of the resin tubular body 21 (the outer peripheral surface of the thermal expansion material layer 32).

  The fireproof heat insulating material layer 33 of the present embodiment further includes a second end surface covering portion 33c covering the end surface of the second end 32b, and the fireproof heat insulating material layer 33 includes an outer periphery covering portion 33a and a second end surface covering portion 33c. Have a continuous configuration.

As shown in FIG. 2, the fireproof heat insulating material layer 33 has both end portions (circumferential end portions 33 d and 33 d) which are discontinuous in the circumferential direction of the resin tube 21.
In the refractory member 31, the thermal expansion material layer 32 and the refractory heat insulating material layer 33 may be separately arranged on the outer periphery of the resin tubular body 21, or the thermal expansion material layer 32 and the refractory heat insulating material layer 33 are provided. You may arrange | position as a laminated sheet material laminated | stacked previously. In this embodiment, a laminated sheet material is used, and this laminated sheet material has both end portions that are discontinuous in the circumferential direction of the resin tube body 21 when wound around the outer periphery of the resin tube body 21. ing. That is, not only the fireproof heat insulating material layer 33 but also the thermal expansion material layer 32 have both end portions which become discontinuous in the circumferential direction of the resin tube body 21.

  The fire-resistant heat insulating material layer 33 can be composed of, for example, a fire-resistant foam sheet material, a sheet material containing fire-resistant fibers, and the like. As the sheet material, a sheet material containing a refractory fiber can be suitably used. Examples of the refractory fiber include glass fiber, silica fiber, alumina fiber, ceramic fiber, metal fiber, mineral fiber, alumina fiber, and carbon fiber. The sheet material including the refractory fiber is configured as, for example, a woven fabric or a non-woven fabric. The refractory heat insulating material layer 33 may have a single layer structure or a multilayer structure.

The heat resistant temperature of the fireproof heat insulating material layer 33 is preferably 700 ° C. or more, more preferably 800 ° C. or more, and still more preferably 900 ° C. or more. The density of the fireproof heat insulating material layer 33 is preferably in the range of ^{30 to} 250 kg / m ³ . The thickness of the fireproof heat insulating material layer 33 is preferably in the range of 2 to 15 mm.

  The fireproof structure can be formed by arranging the fireproof member 31 on the outer periphery of the resin tube 21 previously inserted in the through hole 11 a of the partition 11. For example, when using the sheet-like refractory member 31 in which the thermal expansion material layer 32 and the refractory heat insulating material layer 33 are integrated, the refractory member 31 is connected to the outer peripheral surface of the resin tubular body 21 and the inner peripheral surface of the through hole 11a. What is necessary is just to wind around the outer periphery of the resin-made pipe bodies 21, inserting between them. At this time, a pressure-sensitive adhesive tape may be used which connects both ends (circumferential end portions 33d and 33d) of the fireproof heat insulating material layer 33 so that the fireproof member 31 is maintained in a tubular shape. In the case of a fire, the adhesive layer of the adhesive tape is heated (thermally decomposed), so that the adhesive tape is detached from the fireproof heat insulating layer, and thus separation of both ends of the fireproof heat insulating material layer 33 is allowed.

Next, the main function of the fireproof structure will be described.
As shown in FIG. 1, the fireproof structure is a protective space that protects the space on the first end portion 32 a side of the thermal expansion material layer 32 from the two spaces formed on both sides of the partition portion 11 from fire. The space on the second end 32 b side of the thermal expansion material layer 32 is installed as a space on the fire side assuming the occurrence of a fire.

  As shown in FIG. 3 and FIG. 4, when the thermal expansion material layer 32 and the resin tube 21 are heated by heat at the time of fire, the closed portion 51 including the product generated from the thermal expansion material layer 32 is formed Be done. The closing part 51 closes the through hole 11a of the partition part 11. In addition, the obstruction | occlusion part 51 may contain the decomposition product which a part of resin pipe body 21 thermally decomposed.

  Here, since the heat transmitted from the second end 32b side shown in FIG. 1 at the time of fire is thermally insulated by the outer periphery covering portion 33a and the first end face covering portion 33b of the fireproof heat insulating material layer 33, the heat is transmitted from the second end 32b side The thermal expansion of the first end portion 32a using the transmitted heat can be promoted. That is, the delay of the thermal expansion of the first end portion 32a with respect to the thermal expansion of the second end portion 32b can be suppressed. Since the first end portion 32a that thermally expands in this way is disposed between the outer peripheral surface of the resin tubular body 21 and the inner peripheral surface of the through hole 11a, the first end portion 32a of the thermal expansion material layer 32 is provided. Can be thermally expanded relatively quickly in the through hole 11a.

  2 has both end portions that are discontinuous in the circumferential direction of the resin pipe body 21. In this case, as shown in FIG. 4, when the thermal expansion material layer 32 is thermally expanded, the refractory heat insulation material layer 33 can be easily deformed so as to expand its diameter because both ends thereof can be separated. Thereby, the gap between the outer peripheral surface of the fireproof heat insulating material layer 33 and the inner surface of the through hole 11a of the dividing portion 11 is narrowed, or the outer peripheral surface of the fireproof heat insulating material layer 33 is divided as shown in FIG. It can be brought into close contact with the inner surface.

The operation and effects of the first embodiment will be described.
(1-1) The fireproof member 31 in the fireproof structure includes the thermal expansion material layer 32 which thermally expands due to heating at the time of fire, and the fireproof thermal insulation material layer 33 disposed on the outer peripheral side of the thermal expansion material layer 32 . The first end 32 a of the thermal expansion material layer 32 is disposed between the outer peripheral surface of the resin tube 21 and the inner peripheral surface of the through hole 11 a. The refractory heat insulating material layer 33 has a configuration in which an outer peripheral covering portion 33 a that covers the outer peripheral side of the thermal expansion material layer 32 and a first end surface covering portion 33 b that covers the end surface of the first end portion 32 a are continuous.

  According to this configuration, as described above, the first end portion 32a of the thermally expandable material layer 32 can be thermally expanded relatively early in the through hole 11a. Thereby, the through-hole 11a of the partition part 11 can be closed earlier.

  (1-2) The end surface of the second end portion 32b of the thermal expansion material layer 32 protrudes from the opening of the through hole 11a. In this case, it becomes easy to ensure a sufficient volume of the product generated from the thermal expansion material layer 32 in the event of a fire. Therefore, the through-hole 11a of the partition part 11 can be closed more suitably.

  (1-3) The refractory heat insulating material layer 33 has both end portions that are discontinuous in the circumferential direction of the resin tubular body 21. In this case, as described above, the gap between the outer peripheral surface of the fireproof heat insulating material layer 33 and the inner surface of the through hole 11a of the partition 11 is further narrowed, or the outer peripheral surface of the fireproof heat insulating material layer 33 is the inner surface of the partition 11 It becomes possible to make it adhere to. Therefore, it is possible to more suitably close the through hole 11a using the refractory heat insulating material layer 33.

Second Embodiment
Next, a second embodiment of the fireproof structure and the fireproof member 31 will be described focusing on differences from the first embodiment.

  As shown in FIG. 5, the partitions 11 of the present embodiment are hollow walls, and the first wall 12 and the second wall 13, the first wall 12, and the second wall, which are disposed to be opposed to each other. It has the hollow part 14 between the parts 13. FIG. The first wall portion 12 and the second wall portion 13 in the present embodiment are each formed of two boards (for example, gypsum boards), but the configuration of the first wall portion 12 and the second wall portion 13 is Each can be changed independently.

  The fireproof member 31 includes a first fireproof member 31 a provided corresponding to the first wall 12 and a second fireproof member 31 b provided corresponding to the second wall 13. The first refractory member 31a and the second refractory member 31b are disposed independently.

  The first refractory member 31 a and the second refractory member 31 b are disposed such that the second end 32 b of the thermal expansion material layer 32 is on the hollow portion 14 side of the hollow wall. In other words, the first fireproof member 31 a and the second fireproof member 31 b are disposed such that the first end 32 a of the thermal expansion material layer 32 is outside the hollow portion 14.

The fireproof structure can be formed by disposing the first fireproof member 31a and the second fireproof member 31b on the outer periphery of the resin tubular body 21 inserted in advance in the through hole 11a of the partitioning portion 11.
In the fireproof structure of the second embodiment, when the space on the second wall portion 13 side becomes the fire side space among both spaces partitioned by the partition portion 11 (hollow wall), the first fireproof member 31a It is possible to preferably close the through hole 11 a of the one wall portion 12. Moreover, when the space by the side of the 1st wall part 12 turns into the space by the side of fire among the both spaces divided by the division part 11 (hollow wall), the through-hole of the 2nd wall part 13 by the 2nd fireproof member 31b It is possible to preferably close 11 a.

In the second embodiment, the same effects as the effects described in the (1-1) to (1-3) columns of the first embodiment can be obtained. In the second embodiment, the following operations and effects can be further obtained.
(2-1) The fireproof structure includes a first fireproof member 31a provided corresponding to the first wall portion 12 of the hollow wall, and a second fireproof member 31b provided corresponding to the second wall portion 13 of the hollow wall. Is equipped. In this case, by the above-described operation, it is possible to exhibit a suitable closing function even against a fire that occurs in any space on the first wall 12 side and the second wall 13 side.

  (2-2) When a fire occurs, for example, in the space on the side of the second wall 13 among the spaces on the side of the first wall 12 and the side of the second wall 13, the second wall due to the heat of the fire, etc. 13 may collapse. In the fireproof structure of the present embodiment, since the first fireproof member 31a and the second fireproof member 31b are disposed independently, even if the second fireproof member 31b moves with the fall of the second wall portion 13, The first refractory member 31a is likely to stay in a predetermined position. In addition, when a fire occurs in the space on the first wall 12 side and the first wall 12 collapses, the second fireproof member 31 b tends to stay at a predetermined position. That is, even when one of the first wall portion 12 and the second wall portion 13 falls down, the other blocking function of the first fireproof member 31a and the second fireproof member 31b can be sufficiently exhibited. . Therefore, it can be suitably used as a fireproof structure having a hollow wall.

(Modification example)
The above embodiment can be implemented with the following modifications. The above embodiments and the following modifications can be implemented in combination with one another as long as there is no technical contradiction.

  As shown in FIG. 6, the fireproof structure may further include a soundproof layer 41 disposed on the outer periphery of the resin tubular body 21. In this case, the fireproof member 31 may be disposed on the outer periphery of the soundproof layer 41. The structure of the soundproof layer 41 is not specifically limited, For example, the laminated structure of a sound absorption layer and the sound insulation layer arrange | positioned at the outer peripheral side of a sound absorption layer is mentioned.

  As shown in FIG. 6, the fireproof structure may further include a caulking material 42 disposed on the outer periphery of the fireproof member 31. The caulking material 42 is disposed, for example, along the circumferential direction of the resin tube 21 so as to fill the gap between the outer peripheral surface of the fireproof member 31 and the inner peripheral surface of the through hole 11 a. As the caulking material 42, a resin-based caulking material such as a silicone resin caulking material can be used.

  -Although illustration is abbreviate | omitted, you may provide the adhesive tape which connects the resin-made tubular bodies 21, the said sound-insulation layer 41, and the fireproof member 31. FIG. For example, a butyl rubber tape can be used as the adhesive tape. Thereby, the position shift of the refractory member 31 can be suppressed over a long period of time.

  -As shown in FIG. 1, the fireproof heat insulating material layer 33 in the fireproof member 31 of 1st Embodiment has the extension part extended toward the protection side from the 1st end surface coating | coated part 33b. Such an extended portion can be omitted as shown in FIG.

-As shown in FIG.7 (b), the fireproof member 31 may further be equipped with the holding | maintenance layer 43 which hold | maintains the thermal expansion material layer 32 to the fireproof heat insulating material layer 33. As shown in FIG.
-The 2nd end face covering part 33c of a fireproof heat insulation layer can also be omitted.

-The circumferential direction edge parts 33d and 33d of a fireproof heat insulation layer can also be abbreviate | omitted. That is, the refractory heat insulating layer may be formed in a continuous cylindrical shape.
The thermal expansion material layer 32 may have a cylindrical shape that is continuous in the circumferential direction of the resin tube 21, or may have both end portions that are discontinuous in the circumferential direction. Further, the thermal expansion material layer 32 may be configured of a plurality divided in the circumferential direction of the resin tube 21. The shape and number of the fireproof heat insulating material layer 33 may be changed according to the shape and number of such a thermal expansion material layer.

  The end surface of the second end portion 32b of the thermal expansion material layer 32 protrudes from the opening of the through hole 11a, but the end surface of the second end portion 32b is within the through hole 11a (the outer peripheral surface of the resin tubular body 21 and You may change the dimension of the thermal expansion material layer 32 so that it may arrange | position between the internal peripheral surfaces of the through-hole 11a.

  The refractory member 31 may be provided with a display part for aligning the position of the first end part 32 a of the thermal expansion material layer 32 with respect to the through hole 11 a of the partition part 11. Such a display unit is arranged so as to be aligned with, for example, the opening end of the through hole 11a when the fireproof member 31 is disposed on the outer peripheral side of the resin tubular body 21 inserted in advance in the through hole 11a of the partitioning unit 11. Can be provided. Since the worker who arranges the fireproof member 31 may arrange (insert) the fireproof member 31 with the display portion as a mark, the work of arranging the fireproof member 31 can be made efficient.

  -The resin-made pipe body 21 may be used for uses other than a drainage system. Moreover, the resin pipe body 21 may be arranged so as to extend in a direction other than the horizontal direction (for example, the vertical direction).

DESCRIPTION OF SYMBOLS 11 ... Partition part (hollow wall), 11a ... Through-hole, 12 ... 1st wall part, 13 ... 2nd wall part, 14 ... Hollow part, 21 ... Resin pipe body, 31 ... Fireproof member, 31a ... 1st fireproof Member, 31b ... second fireproof member, 32 ... thermal expansion material layer, 32a ... first end, 32b ... second end, 33 ... fireproof heat insulating material layer, 33a ... outer periphery covering portion, 33b ... first end face covering portion 33d, circumferential end portions, 51, closed portions, LD, axial directions.

Claims (7)

A fireproof structure including a partition having a through hole, a resin tube inserted into the through hole, and a fireproof member disposed on an outer peripheral side of the resin tube,
The fireproof member is
The thermal expansion material layer which is thermally expanded by heating at the time of fire, and the fireproof heat insulating material layer disposed on the outer peripheral side of the thermal expansion material layer,
The thermal expansion material layer has a first end and a second end which are both ends along the axial direction of the resin pipe,
The first end portion is disposed between an outer peripheral surface of the resin pipe and an inner peripheral surface of the through hole.
The fireproof heat insulating material layer has a configuration in which an outer peripheral covering portion that covers an outer peripheral side of the thermal expansion material layer and an end surface covering portion that covers an end surface of the first end portion are continuous.   2. The fireproof structure according to claim 1, wherein an end surface of the second end portion protrudes from an opening of the through hole.   3. The fireproof structure according to claim 1, wherein the fireproof heat insulating material layer has discontinuous ends in the circumferential direction of the resin tubular body.   The said fireproof heat insulating material layer is comprised from the sheet material containing a fireproof fiber, The fireproof structure as described in any one of Claims 1-3 characterized by the above-mentioned. The partition is a hollow wall having a first wall and a second wall disposed opposite to each other, and a hollow portion between the first wall and the second wall.
The fireproof member includes a first fireproof member provided corresponding to the first wall, and a second fireproof member provided corresponding to the second wall.
The said 1st fireproof member and the said 2nd fireproof member are each arrange | positioned so that the said 2nd edge part may become the hollow part side of the said hollow wall, The any one of Claims 1-4 characterized by the above-mentioned. The fireproof structure described in the paragraph.   The fireproof structure according to claim 5, wherein the first fireproof member and the second fireproof member are arranged independently. It is a fireproof member disposed on the outer peripheral side of a resin tube which is inserted through the through hole of the dividing portion,
The thermal expansion material layer which is thermally expanded by heating at the time of fire, and the fireproof heat insulating material layer disposed on the outer peripheral side of the thermal expansion material layer,
The thermal expansion material layer has a first end and a second end which are both ends along the axial direction of the resin pipe,
The first end portion is disposed between an outer peripheral surface of the resin pipe and an inner peripheral surface of the through hole.
The fireproof heat insulating material layer has a configuration in which an outer peripheral covering portion that covers an outer peripheral side of the thermal expansion material layer and an end surface covering portion that covers an end surface of the first end portion are continuous.