Drainage piping member

Abstract

To provide a drain piping member capable of realizing a fire compartment structure without increasing the amount of use of a thermal expansion material.SOLUTION: The drain piping member 10 is a drain piping member used for drain piping penetrating a floor slab S in a building, and includes a drain pipe joint 100 disposed in a through-hole of the floor slab S, a downstairs drain pipe 530 provided below the drain pipe joint 100, and a heat-resistant mat 150 provided in a cylindrical shape on outer peripheral surfaces of a part of a lower end side of the drain pipe joint 100 and a part of an upper end side of the downstairs drain pipe 530 so as to cover a part of the downstairs drain pipe 530 that exhibits a thermal expansion function. The heat-resistant mat 150 is formed by intertwining inorganic fibers having a heat-resistant temperature of 800 °C or higher and a predetermined length, and includes a shape maintaining mechanism for maintaining a cylindrical shape even in case of fire and a fall preventing mechanism for preventing the heat-resistant mat 150 itself from falling.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a drainage piping member, an installation method thereof, and a fire compartment structure, and in particular to a drainage piping member used, for example, for drainage piping that penetrates the floor slab of a building, an installation method thereof, and a fire compartment structure using the drainage piping member. [Background technology]

[0002] An example of a conventional drainage piping component is disclosed in Patent Document 1. The drainage pipe joint disclosed in Patent Document 1 includes a first joint component, which constitutes part of a floor slab penetration, formed of a fire-resistant, thermally expandable resin pipe including at least a tubular fire-resistant expansion layer made of a fire-resistant, thermally expandable resin composition. A sound-insulating cover is provided around the joint of the second joint component, which together with the first joint component forms the floor slab penetration. The sound-insulating cover is formed by wrapping the sound-insulating resin sheet around the joint body so that the thermal contraction direction of the sound-insulating resin sheet is parallel to the central axis of the floor slab penetration. The sound-insulating resin sheet also includes a surface layer made of a soft polyvinyl chloride resin sheet and a back layer made of a nonwoven fabric of synthetic resin such as polyester. In the technology disclosed in Patent Document 1, the fire-resistant expansion layer (thermal expansion material) thermally expands during a fire to block the floor slab penetration, thereby preventing heat, flames, smoke, and the like from traveling from the lower floor to the upper floor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-247372 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the technology of Patent Document 1, in the event of a fire, the thermal expansion material may not be properly retained in the through-hole of the floor slab, and some of the thermal expansion material may fall along with the sound-insulating cover, which may result in the floor slab through-hole not being properly blocked. Therefore, in order to properly block the through-hole of the floor slab, it is necessary to use a large amount of thermal expansion material, which increases the cost of the material.

[0005] The present invention was developed in consideration of the above-mentioned problems, and its purpose is to provide a new drainage piping component, a method for installing the drainage piping component, and a fire compartment structure using the drainage piping component. Another object of the present invention is to provide a drainage piping member that can realize a fire compartment structure in a floor slab with a through hole in a building, a method for installing the drainage piping member, and a fire compartment structure using the drainage piping member. [Means for solving the problem]

[0006] In order to achieve the above object, the drainage piping member according to the present invention employs the following technical means. That is, a drainage piping member according to one aspect of the present invention is a drainage piping member used for drainage piping that penetrates a floor slab of a building, and includes a drainage pipe or a drainage pipe joint that is placed in a through-hole in the floor slab, a lower floor drainage pipe that is provided below the through-hole, and a heat-resistant mat that is provided in a cylindrical shape on the outer circumferential surface of the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe so as to include a portion that exhibits a thermal expansion function in the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe, and the lower floor drainage pipe may be the same as the drainage pipe, and the heat-resistant mat may be a heat-resistant mat. It is formed by intertwining inorganic fibers of a predetermined length that have a heat temperature of 800°C or higher, and is equipped with a shape maintenance mechanism that maintains the cylindrical shape even in the event of a fire, and a fall prevention mechanism that prevents the heat-resistant mat itself from falling.

[0007] Preferably, the drain pipe joint is made of cast iron, and the lower floor drain pipe is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separate from the pipe body, and the fall prevention mechanism can be configured to be realized by fixing the heat-resistant mat to the cast iron drain pipe joint. More preferably, the drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separate from the pipe body, and the fall prevention mechanism can be configured to be realized by fixing the heat-resistant mat to the floor slab.

[0008] More preferably, the drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separate from the pipe body, and the fall prevention mechanism can be configured to be realized by burying at least a portion of the heat-resistant mat in the floor slab. More preferably, the heat-resistant mat is formed into a cylindrical shape by wrapping a flat nonwoven fabric mat around the outer surface of the drain pipe, the drain pipe fitting or the lower floor drain pipe, and the shape-retention mechanism can be configured to have the function of preventing the cylindrical shape from returning to the flat shape.

[0009] More preferably, the shape-retaining mechanism can be configured to have the function of preventing the cylindrical shape from returning to the flat shape by using a joining member that joins the ends of the cylindrically formed nonwoven fabric mat, by using a wrapping member that wraps around the outer periphery of the cylindrically formed nonwoven fabric mat once around, or by burying the heat-resistant mat in the floor slab.

[0010] More preferably, the drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin having a thermal expansion material separate from the pipe body, and the drain piping member further comprises a resin cover that covers the outer periphery of the heat-resistant mat and is integrated with the drain pipe, the drain pipe joint or the lower floor drain pipe, and the fall prevention mechanism can be configured to be realized by fixing the heat-resistant mat to the resin cover.

[0011] More preferably, the fall prevention mechanism can be configured so as to be realized by fixing the heat-resistant mat to the resin cover at a position above the portion exhibiting the thermal expansion function. More preferably, the fall prevention mechanism can be configured to be realized by engaging a locking portion provided on the inner surface of the resin cover with a lockable portion provided on the outer surface of the heat-resistant mat.

[0012] More preferably, the locking portion may be a protrusion, and the locked portion may be a groove that is locked onto the protrusion. More preferably, the resin cover can be configured to be integrated with the drain pipe, the drain pipe joint or the lower floor drain pipe by a watertight gasket. More preferably, the heat-resistant mat wrapped around the outer circumferential surface to form a cylindrical shape can be configured to have a tapered portion whose diameter decreases downward. More preferably, the inorganic fibers are silica fibers.

[0013] In addition, a drainage piping component according to another aspect of the present invention is a drainage piping component used for drainage piping that penetrates the floor slab of a building, and comprises: a drainage pipe or drainage pipe joint that is placed in a through hole in the floor slab; a lower floor drainage pipe that is located below the through hole; and a heat-resistant mat that is cylindrically arranged on the outer surface of the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe so as to encompass a portion of the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe that exhibits a thermal expansion function, including cases where the lower floor drainage pipe is the same as the drainage pipe; the heat-resistant mat is formed by intertwining inorganic fibers and has a fall prevention mechanism that prevents the heat-resistant mat itself from falling; the drainage pipe or the drainage pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin that has a thermal expansion material separate from the pipe body; and the drainage piping component further comprises a resin cover that covers the outer surface of the heat-resistant mat and is integrated with the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe.

[0014] Preferably, the fall prevention mechanism can be configured to be realized by fixing the heat-resistant mat to the resin cover. More preferably, the inorganic fibers are glass wool fibers. More preferably, the drain pipe or the drain pipe joint may be made of polyvinyl chloride. Furthermore, a fire compartment structure according to yet another aspect of the present invention comprises a floor slab having a through hole formed therein, a drainage piping member as described above that is arranged to pass through the through hole, and a filler material filled between the outer peripheral surface of the drainage piping member and the inner peripheral surface of the through hole.

[0015] Preferably, the floor slab may be configured to form the lowest floor. Furthermore, a construction method according to yet another aspect of the present invention is a construction method for constructing a drainage piping component described in any of the above on a floor slab having a through hole formed therein, and includes the steps of arranging the heat-resistant mat in a cylindrical shape on the outer peripheral surface of the drainage pipe, the drainage pipe joint or the lower floor drainage pipe so as to enclose a portion of the drainage pipe, the drainage pipe joint or the lower floor drainage pipe that exhibits a thermal expansion function, and having a shape maintenance mechanism that maintains the cylindrical shape even in the event of a fire and a fall prevention mechanism that prevents the heat-resistant mat itself from falling, installing the drainage piping component in the through hole, and filling a filler material between the outer peripheral surface of the drainage piping component and the inner peripheral surface of the through hole. [Effects of the Invention]

[0016] According to the present invention, the areas that expand thermally during a fire and exhibit their thermal expansion function are properly maintained by the heat-resistant mat, so that a fire compartment structure can be realized in floor slabs with through holes in buildings without increasing the amount of thermal expansion material used. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a side view (half cross-sectional view) showing a drainage piping component 10 in which a drainage pipe joint 100 according to a first embodiment of the present invention is adopted. [Figure 2] 2A is a perspective view showing the drainage piping member 10 in FIG. 1 before a heat-resistant mat 150 is applied, and FIG. 2B is a perspective view showing the drainage piping member 10 in FIG. 1 after the heat-resistant mat 150 has been applied. [Figure 3] FIG. 10 is a side view showing a drainage piping member 20 employing a drainage pipe 200 according to a second embodiment of the present invention (a cross-sectional view of the components other than the drainage pipe 200). [Figure 4] FIG. 10 is a side view showing a drain piping member 30 employing a drain pipe 300 according to a third embodiment of the present invention (a cross-sectional view of the components other than the drain pipe 300). [Figure 5] FIG. 10 is a side view showing a drain piping member 40 employing a drain pipe joint 400 according to a fourth embodiment of the present invention (a cross-sectional view of the drain pipe joint 400 and the like). [Figure 6](A) A side view showing a drainage piping member 50 incorporating a drainage pipe fitting 500 according to the fifth embodiment of the present invention (cross-sectional view of all but the left half of the drainage piping member 50), and (B) an enlarged cross-sectional view of the drainage piping member 50 in region 6B shown in Figure 6(A). [Figure 7] 7A to 7C are diagrams for explaining a procedure for fixing the heat-resistant mat 550 to the resin cover 560 in the drainage piping member 50 shown in FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0018] In the following, a drainage piping component 10 incorporating a drainage pipe fitting 100 according to a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2, a drainage piping component 20 incorporating a drainage pipe 200 with reference to FIG. 3, a drainage piping component 30 incorporating a drainage pipe 300 with reference to FIG. 4, a drainage piping component 40 incorporating a drainage pipe fitting 400 with reference to FIG. 5, and a drainage piping component 50 incorporating a drainage pipe fitting 500 with reference to FIGS. 6 and 7. The fire compartment structure and the construction method for the drainage piping component will also be described in detail. In the following description, the outer peripheral surface, the outer surface, the outer layer side, the outer peripheral side, and the inner layer side, the inner peripheral side, and the inner side may not be clearly distinguished. Furthermore, vibration-damping materials, sound-absorbing materials, sound-insulating covers, water-stop packings, and other components of the drainage pipe fittings 100, 400, and 500 or the drainage pipes 200 and 300, which are not relevant to the present invention, may not be shown in the drawings or described.

[0019] <First embodiment: Structure of drainage piping member (part 1)> As shown in Fig. 1, a drainage piping component 10 according to an embodiment of the present invention is a drainage piping component that uses a drainage pipe joint 100 (also referred to as a drainage collection pipe). This drainage piping component 10 is a drainage piping component used for drainage piping that penetrates a floor slab S in a building, and includes the drainage pipe joint 100 that is placed in the through-hole of the floor slab S, a lower floor drain pipe 530 that is installed below the drainage pipe joint 100, and a heat-resistant mat 150 that is cylindrically installed on the outer circumferential surface of the drainage pipe joint 100 or the lower floor drain pipe 530 (here, the outer circumferential surface that spans a part of the lower end side of the drainage pipe joint 100 and a part of the upper end side of the lower floor drain pipe 530) so as to include a portion that exhibits thermal expansion function in the drainage pipe joint 100 or the lower floor drain pipe 530 (here, the lower floor drain pipe 530). The heat-resistant mat 150 is formed by intertwining inorganic fibers of a predetermined length that have a heat resistance temperature of 800°C or higher, and is equipped with a shape-maintaining mechanism that maintains its cylindrical shape even in the event of a fire, and a fall prevention mechanism that prevents the heat-resistant mat 150 itself from falling. Details of this heat-resistant mat 150 will be described later.

[0020] Here, the drain pipe joint 100 can be made of cast iron, and the lower floor drain pipe 530 can be made of a fire-resistant synthetic resin containing a thermal expansion material, or a non-fire-resistant synthetic resin provided with a thermal expansion material separate from the pipe body of the lower floor drain pipe 530. Here, the description will be given assuming that the lower floor drain pipe 530 is a pipe made of a fire-resistant synthetic resin (fire-resistant vinyl) containing a thermal expansion material. The fall prevention mechanism for the heat-resistant mat 150 can be configured to be realized by fixing the heat-resistant mat 150 to the cast iron drain pipe joint 100. Note that the upper floor drain pipe 520, like the lower floor drain pipe 530, is also a pipe made of a fire-resistant synthetic resin (fire-resistant vinyl) containing a thermal expansion material.

[0021] Although not limited to this, the drain pipe joint 100 is connected to an upper floor drain pipe 520 on the upper floor side above the floor slab S, which allows drainage water to flow in from the upper floor, (three drainage horizontal branch pipes in this case) above the floor slab S, and a lower floor drain pipe 530 on the lower floor side, which allows drainage water to flow out to the lower floor below the floor slab S. The upper floor drain pipe 520 on the upper floor side is connected to two upper floor drain pipes 520 by joints 524, and standpipe covering material 522 is wrapped around the outer periphery of these pipe bodies. In addition, a penetration covering material 102 is wrapped around the outer periphery of the pipe body of the drain pipe joint 100, and a standpipe covering material 532 is wrapped around the outer periphery of the pipe body of the lower floor drain pipe 530 on the lower floor side.

[0022] The drain pipe joint 100 is made of cast iron and is fire-resistant in itself, and will not deform, melt, or burn due to the heat of a normal fire. The drainage pipe includes a pipe main body 110 that, when installed in a building, is disposed including the through-hole of the floor slab S, an upper riser connection portion 120 that protrudes above the floor slab S and connects to a drainage standpipe (here, an upper floor drainpipe 520) that allows drainage water to flow in from the upper floor, a drainage pipe connection portion 130 that protrudes below the floor slab S and connects to a drainage standpipe (here, a lower floor drainpipe 530) that allows drainage water to flow out to the lower floor, and a horizontal branch pipe connection portion 140 that connects a horizontal drainage branch pipe 510 above the floor slab S. The pipe main body 110 is composed of a straight pipe portion 116 that is disposed at the position of the slab S and a reduced diameter portion 118 below the straight pipe portion 116, and the reduced diameter portion 118 may be provided with a swirl vane or the like on its inner surface. Note that these piping structures are merely examples, and the use of the drainage piping component according to the present invention is not limited to the piping structures shown.

[0023] Here, we will explain the connection between the drain pipe joint 100 and the lower floor drain pipe 530 on the lower floor side, which is the part across which the heat-resistant mat 150 is installed. The drain pipe joint 100 is provided with a mechanical joint part equipped with a (cast iron) flange 162 and a push ring 160 on the lower end surface of the drain pipe connection part 130 in order to connect the plain-end lower floor drain pipe 530, and a rubber ring 164 provided between the outer surface of the lower floor drain pipe 530 and the inner surface of the mechanical joint part in the vertical direction and between the flange 162 and the push ring 160 is compressed (by fastening the flange 162 and the push ring 160 with multiple sets of bolts 180 and nuts 170) to generate surface pressure and stop water, connecting the cast iron drain pipe joint 100 and the lower floor drain pipe 530 made of fire-resistant synthetic resin (fire-resistant vinyl).

[0024] A heat-resistant mat 150 is then installed including the connection portion between these drain pipe joints 100 and the lower floor drain pipe 530 (straddling the drain pipe joints 100 and the lower floor drain pipe 530 so as to include the connection portion). Here, because the drain pipe joints are made of cast iron and the lower floor drain pipe 530 is made of a fire-resistant synthetic resin (fire-resistant vinyl) containing a thermal expansion material, the portion that exhibits thermal expansion function is located on the lower floor drain pipe 530 side and not on the drain pipe joint 100 side. The heat-resistant mat 150 is installed in a cylindrical shape, including the outer circumferential surface of the lower floor drain pipe 530, so as to encompass the lower floor drain pipe 530 where the portion that exhibits thermal expansion function is located. In this case, the heat-resistant mat 150 is installed on the lower floor drain pipe 530 so as to encompass the lower floor drain pipe 530 where the portion that exhibits thermal expansion function is located, and this heat-resistant mat 150 is also installed in a cylindrical shape on a portion of the outer circumferential surface of the lower end side of the drain pipe joint 100. In this way, the heat-resistant mat 150 is installed so as to enclose the lower floor drain pipe 530, which has a portion that exhibits a thermal expansion function, and to be fixed to the cast iron drain pipe joint 100. By fixing the heat-resistant mat to the cast iron drain pipe joint 100 in this way, the fall prevention function of the heat-resistant mat 150 is exhibited.

[0025] Here, we will explain this heat-resistant mat 150. This heat-resistant mat 150 is the same as the heat-resistant mats 250, 350, and 550 in other embodiments described later (except for the fall prevention mechanism and / or shape-retaining mechanism) (especially the same functions and effects), so this point will not be repeatedly explained in other embodiments. As shown in FIG. 1, such a drain pipe fitting 100 is piped so as to pass through a through-hole in a floor slab S. A filler material M such as mortar is filled between the outer peripheral surface of the drain pipe fitting 100 and the inner peripheral surface of the through-hole. This forms a fire compartment structure in which the drain pipe fitting 100 is piped in the through-hole in the floor slab S. In the event of a fire, the thermal expansion material contained in the synthetic resin forming the lower floor drain pipe 530 expands, preventing heat, flames, smoke, etc. generated on the floor below the floor slab S from passing through the through-hole and reaching the upper floor.

[0026] The floor slab S shown in Fig. 1 may form the floor of an intermediate floor (other than the lowest floor) or may form the floor of the lowest floor. Furthermore, since the fact that the floor slab S may form the floor of an intermediate floor or the floor of the lowest floor is the same in other embodiments (floor slabs S in Figs. 3 to 6 to be described later), in other embodiments I will not repeat this point here.

[0027] In order for the thermal expansion material to expand and achieve a fire compartment structure, it is necessary for the thermal expansion material to be properly held in a predetermined position. However, fire resistance tests conducted by the applicant have revealed that there is a possibility that parts of the thermal expansion material may fall from their predetermined positions. Meanwhile, covers are known in which the parts that exhibit thermal expansion function are formed using glass wool, which has a heat resistance temperature of about 400°C, or rock wool, which has a heat resistance temperature of about 650°C, and these covers are generally attached by wrapping them around the pipe body. Glass wool and rock wool are generally known as highly heat-resistant materials, but fire resistance tests conducted by the applicant have revealed that covers formed using glass wool or rock wool may have parts that open (be unable to maintain their shape) or fall off (be unable to prevent falling).

[0028] Therefore, in the present invention, the heat-resistant mat 150 is formed from inorganic fibers that have higher heat resistance than rock wool, and in the event of a fire, the heat-resistant mat 150, which combines a shape-maintaining mechanism and a fall-prevention mechanism, is used to hold the thermally expansive material, allowing the thermally expansive material to expand appropriately and achieve a fire compartment structure. In other words, the heat-resistant mat 150, which combines a shape-maintaining mechanism and a fall-prevention mechanism, is used as a component for achieving appropriate expansion of the thermally expansive material in the event of a fire. The configuration of the heat-resistant mat 150 will be described in detail below.

[0029] The heat-resistant mat 150 is cylindrically arranged on the outer surface so as to encompass the portion that exhibits thermal expansion function (here, so as to cover the outer surface of the lower floor drain pipe 530) and to span a portion of the lower end side of the drain pipe fitting 100 and a portion of the upper end side of the lower floor drain pipe 530. The heat-resistant mat 150 is a cylindrical planar mat member (nonwoven fabric mat) formed by intertwining inorganic fibers of a predetermined length, which have a heat-resistant temperature of 800° C. or higher. The heat-resistant mat 150 thus formed has a porous structure, and numerous irregularities are formed on its inner and outer peripheral surfaces, which provide an anchor effect, which will be described later. Specifically, a planar nonwoven fabric mat formed by intertwining inorganic fibers by needle punching is formed into a cylindrical shape so as to be able to cover the pipe body, as shown in FIG.

[0030] Furthermore, as shown in FIG. 2, the heat-resistant mat 150 is equipped with a shape-retaining mechanism that prevents the tubular shape from returning to its original flat shape. More specifically, the shape-retaining mechanism of the heat-resistant mat 150 uses a joining member to join the ends of the tubular nonwoven fabric mat, thereby preventing the tubular shape from returning to its original flat shape. Specifically, the multiple snap buttons (female snap button 156 and male snap button 158) shown before the heat-resistant mat is installed as shown in FIG. 2(A) are fitted with the corresponding male snap button 158, as shown after the heat-resistant mat is installed as shown in FIG. 2(B). This joins the ends of the tubular nonwoven fabric mat, preventing the tubular shape from returning to its original flat shape. Joining members other than snaps include hooks, buttons, stitching, and hook-and-loop fasteners. A wrapping member that wraps the tubular nonwoven fabric mat around the entire circumference may also be used. Such wrapping members include wire, bands, fastening tapes (hook and loop fasteners), etc. As described above, the heat-resistant mat 150 is a cylindrically formed planar mat member (nonwoven fabric mat) made by intertwining inorganic fibers of a predetermined length that have a heat-resistant temperature of 800°C or higher, and an outer layer sheet material 154 (other than nonwoven fabric) may be attached to the nonwoven fabric mat 152.

[0031] The reason for adopting the heat-resistant mat 150 formed in a cylindrical shape as described above and further provided with a shape-maintaining mechanism and a fall-prevention mechanism is that the mat is formed of inorganic fibers with a heat-resistant temperature of 800°C or higher, and the cylindrical shape does not return to the flat shape of the original nonwoven fabric mat, and the heat-resistant mat 150 itself does not fall. Therefore, even in the event of a fire, the shape of the heat-resistant mat 150 can be maintained in a cylindrical shape and will not fall. This is because it becomes possible to maintain a shape that includes a portion that exhibits a thermal expansion function.

[0032] It is also possible to use a mat member in which inorganic fibers are integrated with a binder, but this raises the risk that the binder will volatilize in the event of a fire, making it impossible to maintain the cylindrical shape of the heat-resistant mat 150. In contrast, by using a mat member (a flat nonwoven fabric mat) formed by mechanically intertwining inorganic fibers, the shape and position of the heat-resistant mat 150 can be properly maintained in the event of a fire.

[0033] Here, although not limited thereto, as shown in FIG. 2(B), it is also preferable that the heat-resistant mat 150 formed into a cylindrical shape by being wrapped around the outer peripheral surface as described above has a tapered portion (the lower half of the heat-resistant mat 150 in FIG. 2(B)) whose diameter becomes smaller as it goes downward. Here, examples of inorganic fibers that can be used include silica fibers, glass wool fibers, biosoluble ceramic fibers, metal fibers such as stainless steel fibers, carbon fibers, alumina fibers, and mixed fibers of two or more of these inorganic fibers. Among these, silica fibers are preferred in consideration of cost and moldability. For this reason, in this embodiment, silica fibers with a heat resistance temperature of 900°C, which satisfies the heat resistance temperature requirement of 800°C or higher, are used as the inorganic fibers. In addition, in this embodiment, glass wool fibers with a heat resistance temperature of approximately 300°C to 400°C may also be used as the inorganic fibers.

[0034] Furthermore, the fiber length (predetermined length) of the inorganic fibers is preferably 50 mm or more and 150 mm or less. If the fiber length is less than 50 mm, the fibers will separate when forming the mat member into a cylindrical shape, causing the fibers to fall and scatter, making it difficult to form the mat member into a cylindrical shape. If the fiber length exceeds 150 mm, the moldability when forming the mat member will decrease. Note that the fiber lengths of the inorganic fibers are preferably aligned to approximately the same length within the range of 50 mm or more and 150 mm or less, but fibers of different lengths may be mixed.

[0035] In a drainage pipe joint 100 (and a fire compartment structure) equipped with such a heat-resistant mat 150, the shape and position of the heat-resistant mat 150 can be maintained even in the event of a fire, without the heat-resistant mat 150 opening, thanks to the shape-retaining mechanism and fall-prevention mechanism provided in the heat-resistant mat 150. Furthermore, the thermally expanded material that expands during a fire becomes entangled in the irregularities formed on the inner peripheral surface of the heat-resistant mat 150, and this anchor effect makes it difficult for the material to fall out of the heat-resistant mat 150. Therefore, the thermally expanded material is properly held by the heat-resistant mat 150 and is difficult to fall out of the heat-resistant mat 150.

[0036] As described above, according to this embodiment, the shape and position of the thermal expansion material that expands during a fire are maintained by the heat-resistant mat 150, so that a fire compartment structure can be realized in a floor slab S with a through hole in a building without increasing the amount of thermal expansion material used, and heat, flames, smoke, etc. generated on the floor below the floor slab S can be prevented from passing through the through hole and reaching the upper floor.

[0037] <Second embodiment: Structure of drainage piping member (part 2)> Next, referring to FIG. 3, a drainage piping member 20 according to a second embodiment of the present invention will be described. The drainage piping member 20 according to the embodiment of the present invention is a drainage piping member using a drainage pipe 200. Here, the drainage pipe 200 may be a fire-resistant synthetic resin (fire-resistant vinyl pipe) containing a thermal expansion material, but in this case it is made of a non-fire-resistant synthetic resin (simple vinyl pipe) that does not contain a thermal expansion material and is provided with a thermal expansion material 210 separately from the pipe body. The fall prevention mechanism provided in the heat-resistant mat 250 is realized by fixing the heat-resistant mat 250 to the floor slab S. The rest of the structure is the same as that described in the first embodiment above. Since this embodiment is the same as that of the previous embodiment, detailed description will not be repeated here. Here, the drainage piping member 20 shown in Fig. 2 depicts a drainage pipe 200 placed in a through-hole in the floor slab S. Here, the drainage pipe 200 placed in the through-hole in the floor slab S is the same as a lower floor drainage pipe (not shown) (which is installed below the through-hole). However, the lower floor drainage pipe is not limited to being the same as the drainage pipe 200.

[0038] As shown in Fig. 3, the heat-resistant mat 250 in the drainage piping member 20 according to this embodiment is provided on the outer peripheral surface of the drainage pipe 200 so as to contain the thermal expansion material 210, which is a portion that exhibits thermal expansion function. The heat-resistant mat 250 is cylindrical and has a flange 252. The heat-resistant mat 250 is fixed by inserting bolts 280 into an insert (nut anchor, body-embedded female thread anchor) 270 provided on the underside of the slab S through a plurality of bolt holes provided in the flange 252, and screwing the bolts 280 into the insert 270. Here, anchor bolts may be driven into the slab S instead of the insert 270, and nuts may be screwed onto the anchor bolts instead of the bolts 280.

[0039] In this way, a fall prevention mechanism is realized by fixing the heat-resistant mat 250 to the floor slab S, and a shape maintenance mechanism is realized by providing the heat-resistant mat 250 in a cylindrical shape on the outer peripheral surface of the drain pipe 200 so as to enclose the thermal expansion material 210. In this case, since the heat-resistant mat 250 has numerous irregularities on its outer surface, the filler M applied so as to contact the upper surface of the flange portion 252 of the heat-resistant mat 250 solidifies while penetrating the upper end surface of the heat-resistant mat 250, and this anchor effect prevents the heat-resistant mat 250 from falling from the slab S (in addition to the fact that the bolts 280 are fastened to the insert 270 through multiple bolt holes provided in the flange portion 252). Furthermore, the thermal expansion material that thermally expands during a fire becomes entangled in the irregularities formed on the inner peripheral surface of the heat-resistant mat 250, and this anchor effect makes it less likely to fall from within the heat-resistant mat 250. Therefore, the thermally expanded thermal expansion material is properly held by the heat-resistant mat 250 and is unlikely to fall off the heat-resistant mat 250.

[0040] As described above, according to this embodiment, the shape and position of the thermal expansion material that expands during a fire are maintained by the heat-resistant mat 250, so that a fire compartment structure can be realized in floor slabs with through holes in a building without increasing the amount of thermal expansion material used, and heat, flames, smoke, etc. generated on the lower floor of the floor slab S can be prevented from passing through the through holes and reaching the upper floors.

[0041] <Third embodiment: Structure of drainage piping member (part 3)> Next, referring to FIG. 4, a drainage piping member 30 according to a third embodiment of the present invention will be described. The drainage piping member 30 according to the embodiment of the present invention is a drainage piping member using a drainage pipe 300. Here, the drainage pipe 300 may be a non-fireproof synthetic resin (simple vinyl pipe) that does not contain a thermal expansion material but has a thermal expansion material separate from the pipe body. However, in this example, the drainage pipe 300 is a fireproof synthetic resin (fireproof vinyl pipe) that contains a thermal expansion material and does not have a thermal expansion material separate from the pipe body. The fall prevention mechanism provided in the heat-resistant mat 350 is realized by embedding at least a portion of the heat-resistant mat 350 in the floor slab S. The rest of the structure is the same as in the first embodiment described above, so detailed description will not be repeated here. Here, the drainage piping member 30 shown in FIG. 3 depicts the drainage pipe 300 disposed in a through hole in the floor slab S. Here, the drainage pipe 300 disposed in the through hole in the floor slab S is the same as the lower floor drainage pipe (not shown) (which is installed below the through hole). However, the lower floor drain pipe is not limited to being the same as the drain pipe 300.

[0042] As shown in FIG. 4, the heat-resistant mat 350 in the drain pipe member 30 according to this embodiment is a heat-resistant mat attached to the outer circumferential surface of the drain pipe 300 so as to enclose the drain pipe 300 that exhibits a thermal expansion function. The heat-resistant mat 350 is provided in a cylindrical shape, and at least a part of the heat-resistant mat 350 (here, about 2 / 3 to about 3 / 4 of the upper side) is embedded in the slab S. In this way, by embedding at least a portion of the heat-resistant mat 350 in the floor slab S, a fall prevention mechanism and a shape-maintenance mechanism are realized (the shape-maintenance mechanism is also due to the fact that the heat-resistant mat 350 is cylindrically disposed on the outer peripheral surface of the drainage pipe 300 so as to enclose the drainage pipe 300). In this case, since the heat-resistant mat 350 has numerous irregularities on its inner and outer peripheral surfaces, the filler M applied so as to contact the outer peripheral surface of the heat-resistant mat 350 solidifies while penetrating the outer peripheral surface of the heat-resistant mat 350, and this anchor effect prevents the heat-resistant mat 350 from falling from the slab S in the event of a fire (in addition to the fact that at least a portion of the heat-resistant mat 350 is embedded in the slab S). Furthermore, the thermally expanded material that expands during a fire becomes entangled in the irregularities formed on the inner peripheral surface of the heat-resistant mat 350, and this anchor effect makes it less likely to fall from within the heat-resistant mat 350. Therefore, the thermally expanded thermal expansion material is properly held by the heat-resistant mat 350 and is unlikely to fall off the heat-resistant mat 350.

[0043] As described above, according to this embodiment, the shape and position of the thermal expansion material that expands during a fire are maintained by the heat-resistant mat 350, so that a fire compartment structure can be realized in floor slabs with through holes in a building without increasing the amount of thermal expansion material used, and heat, flames, smoke, etc. generated on the lower floor of the floor slab S can be prevented from passing through the through holes and reaching the upper floors.

[0044] <Fourth embodiment: Structure of drainage piping member (part 4)> Next, referring to FIG. 5, a drainage piping member 40 according to a fourth embodiment of the present invention will be described. The drainage piping member 40 according to the embodiment of the present invention is a drainage piping member using a drainage pipe joint 400 (also referred to as a drainage manifold). Here, the drainage pipe joint 400 may be a fire-resistant synthetic resin (fire-resistant vinyl pipe) containing a thermal expansion material, but here it is made of a non-fire-resistant synthetic resin (simple vinyl pipe) that does not contain a thermal expansion material and is provided with a thermal expansion material 210 separately from the pipe body. The fall prevention mechanism provided in the heat-resistant mat 250 is realized by fixing the heat-resistant mat 250 to the floor slab S. The rest of the structure is the same as that of the second embodiment described above, so detailed description will not be repeated here.

[0045] As described above, according to this embodiment, the shape and position of the thermal expansion material that expands during a fire are maintained by the heat-resistant mat 250, so that a fire compartment structure can be realized in floor slabs with through holes in a building without increasing the amount of thermal expansion material used, and heat, flames, smoke, etc. generated on the lower floor of the floor slab S can be prevented from passing through the through holes and reaching the upper floors.

[0046] <Fifth embodiment: Structure of drainage piping member (part 5)> Next, a drainage piping member 50 according to a fifth embodiment of the present invention will be described with reference to FIGS. 6 and 7. The drainage piping member 50 according to the embodiment of the present invention is a drainage piping member using a drainage pipe joint 500 (also referred to as a drainage manifold). Here, the drainage pipe joint 500 may be made of a fire-resistant synthetic resin (fire-resistant vinyl pipe) containing a thermal expansion material. However, in this example, the drainage pipe joint 500 is made of a non-fire-resistant synthetic resin (simple vinyl pipe) that does not contain a thermal expansion material and that includes a thermal expansion material 210 separate from the pipe body. Compared to the drainage pipe joint 100 according to the first embodiment, the drainage pipe joint 500 differs from the drainage pipe joint 100 in that it is made of a non-fire-resistant synthetic resin (which includes a thermal expansion material 210 separate from the pipe body) instead of cast iron, that it has one lateral branch pipe connecting portion 140 instead of three (however, the number of lateral branch pipe connecting portions 140 is not limited to one), and that it includes a swirl vane 119. Other than these differences, the drainage pipe joint 500 and the drainage pipe joint 100 share the same features. In addition, in comparison with the drain pipe joint 400 in the fourth embodiment, the fact that the material is made of non-fireproof synthetic resin (provided with the thermal expansion material 210 separately from the pipe body) is a difference between this drain pipe joint and the fourth embodiment. This is common to the pipe fitting 500 and the drain pipe fitting 400. Therefore, in Figures 6 and 7 showing this drain pipe fitting 500, the same reference numerals are used for the components common to the drain pipe fitting 100 (Figure 1) and the drain pipe fitting 400 (Figure 5) according to these embodiments, and their descriptions will not be repeated here.

[0047] Here, the mechanism for preventing the heat-resistant mat 550 from falling in the drain pipe joint 500 according to this embodiment will be described in detail with reference to FIGS. The drain pipe joint 500 further includes a resin cover 560 that covers the outer periphery of the heat-resistant mat 550 and is integrated with the drain pipe joint 500. The fall prevention mechanism is realized by fixing the heat-resistant mat 550 to the resin cover 560. What is even more distinctive is that the fall prevention mechanism realized in this way has the heat-resistant mat 550 fixed to the resin cover 560 at a position above the part that exhibits the thermal expansion function (the position of the thermal expansion material 210). Although not limited to this, this fall prevention mechanism fixes heat-resistant mat 550 to resin cover 560 by engaging locking portion 562 provided on the inner surface of resin cover 560 with locked portion 552 provided on the outer surface of heat-resistant mat 550.

[0048] Furthermore, although not limited thereto, the locking portions 562 are protrusions, and the locked portions 552 are grooves (slits) that are locked with the protrusions (locking portions 562). The protrusions serving as the locking portions 562 provided on the inner peripheral surface of the resin cover 560 are locked with the grooves serving as the locked portions 552 provided on the outer peripheral surface of the heat-resistant mat 550, thereby fixing the heat-resistant mat 550 to the resin cover 560. The protrusions serving as the locking portions 562 provided on the inner peripheral surface of the resin cover 560 are provided corresponding to the positions and number of the grooves serving as the locked portions 552. Furthermore, although not limited thereto, the grooves serving as the locked portions 552 provided on the outer peripheral surface of the heat-resistant mat 550 are provided so as to penetrate from the outer peripheral surface to the inner peripheral surface of the heat-resistant mat 550, as shown in FIGS. 6(B) and 7(B).

[0049] Here, the resin cover 560 is integrated with the main body of the drain pipe joint 500 by a waterproof gasket 570. Furthermore, in relation to the construction method, the resin cover 560 is backfilled with a filler M such as mortar in the compartment penetration portion that penetrates the floor slab S of the building, and the drain pipe joint 500 equipped with the heat-resistant mat 550, which is prevented from falling by the resin cover 560, is fixed to the floor slab S. In this case, the resin cover 560 (not only prevents the heat-resistant mat 550 from falling) is integrated into the drain pipe joint 500. Note that in this embodiment, the shape retention mechanism (the resin cover 560 itself may not be able to be provided with a shape retention mechanism because it may be burned) is realized by, for example, sewing or stapling the heat-resistant mat 550 itself.

[0050] Next, referring to FIG. 7, a procedure for installing a heat-resistant mat 550 equipped with a fall prevention mechanism on the main body of the drain pipe joint 500 will be briefly described. The state shown in FIG. 7(A) is after a fire-resistant tape serving as a thermal expansion material 210 has been wrapped around the straight pipe section 116 (which will be located below the floor slab S after installation) but before the heat-resistant mat 550 and resin cover 560 have been installed. The heat-resistant mat 550 is then placed over the drain pipe joint 500 in the state shown in FIG. 7(A) (in a cylindrical form) or wrapped around it (from a flat surface to a cylindrical form), resulting in the state shown in FIG. 7(B). As described above, grooves serving as engaging portions 552 are provided at multiple locations (four locations in this example) on the outer circumferential surface of the heat-resistant mat 550 (so as to penetrate the inner circumferential surface). At this time, the cylindrically formed heat-resistant mat 550 is sewn, stapled, or the like to exhibit its shape-retention mechanism.

[0051] Here, if the material of the heat-resistant mat 550 is glass wool fiber (heat-resistant temperature 300℃ to 400℃) instead of silica fiber, it does not need to have a shape maintenance mechanism as long as it has a fall prevention mechanism. In other words, when glass wool fiber is used as the material of the heat-resistant mat 550, if the drain pipe or the drain pipe joint is made of polyvinyl chloride, in the event of a fire, the cinders of the polyvinyl chloride and the molten glass wool fiber will come together to block the compartment penetration part and connect to the fall prevention part above the part that exhibits the thermal expansion function (the position of the thermal expansion material 210), so that the heat-resistant mat 550 made of glass wool fiber will not fall, thereby demonstrating fire-resistant performance.

[0052] Next, the resin cover 560 is inserted into the drain pipe joint 500 in the state shown in FIG. 7(B) as indicated by the black arrow, resulting in the state shown in FIG. 7(C). As described above, the inner peripheral surface of the resin cover 560 is provided with protrusions serving as locking portions 562 that correspond to the positions and number of the grooves serving as the locked portions 552. In the drain pipe joint 500 shown in FIG. 7(D), the protrusions serving as locking portions 562 on the inner peripheral surface of the resin cover 560 are engaged with the grooves serving as the locked portions 552 on the outer peripheral surface of the heat-resistant mat 550, thereby fixing the heat-resistant mat 550 to the resin cover 560. Furthermore, in this case, the vertical position at which the heat-resistant mat 550 is fixed to the resin cover 560 (the vertical position of the fall prevention mechanism) is higher than the portion that exhibits the thermal expansion function (the position of the thermal expansion material 210). Because of this hierarchical position (the fall prevention mechanism is located above the thermal expansion material 210), if it were located lower (if the fall prevention mechanism were located below the thermal expansion material 210), there is a possibility that the fall prevention mechanism would be burned down in front of (below) the thermal expansion material 210 and the heat-resistant mat 550 would fall, but this can be reliably prevented.

[0053] The procedure described with reference to Figure 7 may be performed in the installation method of the drainage piping component described below, or the configuration shown in Figure 7(D) (in which the thermal expansion material 210, heat-resistant mat 550, and resin cover 560 are already set) may be realized when the drainage pipe joint 500 is delivered to the installation site. Here, the resin cover 560 with the heat-resistant mat 550 already set may be inserted into the drainage pipe joint 500 in the state shown in Figure 7(A), or the thermal expansion material 210 may also be set in the resin cover 560 (together with the heat-resistant mat 550) in advance. The watertight gasket 570 may also be set in the drainage pipe joint 500 in the state shown in Figure 7(A).

[0054] As described above, according to this embodiment, the shape and position of the thermal expansion material that expands during a fire are maintained by the heat-resistant mat 550, so that a fire compartment structure can be realized in floor slabs with through holes in a building without increasing the amount of thermal expansion material used, and heat, flames, smoke, etc. generated on the lower floor of the floor slab S can be prevented from passing through the through holes and reaching the upper floors.

[0055] <Fire compartment structure using drainage piping components> As shown in Figures 1 and 3 to 7, the drain pipe joint 100, drain pipe 200, drain pipe 300, drain pipe joint 400, and drain pipe joint 500 are piped so as to pass through a through-hole in a floor slab S. Furthermore, a filler M such as mortar is filled between the outer peripheral surfaces of the drain pipe joint 100, drain pipe 200, drain pipe 300, drain pipe joint 400, and drain pipe joint 500 (in the case of the drain pipe joint 500, the outer peripheral surface of the resin cover 560 because the resin cover 560 is integrated as the drain pipe joint 500) and the inner peripheral surface of the through-hole. This forms a fire compartment structure in which the drain pipe joint 100, drain pipe 200, drain pipe 300, drain pipe joint 400, and drain pipe joint 500 are piped in the through-hole in the floor slab S. In the event of a fire, the thermal expansion material contained in the synthetic resin forming the lower floor drain pipe 530, the thermal expansion material 210 provided on the outer periphery of the drain pipe 200, the thermal expansion material contained in the synthetic resin forming the drain pipe 300, the thermal expansion material 210 provided on the outer periphery of the drain pipe joint 400, or the thermal expansion material 210 provided on the outer periphery of the straight pipe portion 116 of the drain pipe joint 500 will thermally expand appropriately at the predetermined positions. By realizing a fire compartment structure in a floor slab with a through hole in a building, heat, flames, smoke, etc. generated on the floor below the floor slab S can be prevented from passing through the through hole and reaching the upper floor.

[0056] <Installation method for drainage piping components> A construction method for placing and constructing a drainage piping component in a through-hole in a floor slab S of a building will be described below. In the following, the construction will be described using a drainage piping component 10 equipped with a drainage pipe joint 100 as a representative example. As described above, in the case of a drainage piping component 50 equipped with a drainage pipe joint 500, the configuration shown in FIG. 7(D) (a configuration in which the thermal expansion material 210, heat-resistant mat 550, and resin cover 560 are already set) may be realized before delivery to the construction site, or, as shown in FIGS. 7(B) and 7(C), construction may be performed at the construction site so that a shape-maintaining mechanism and a fall prevention mechanism are provided.

[0057] The heat-resistant mat 150 is provided in a cylindrical shape on the outer peripheral surface of a part of the lower end side of the drain pipe joint 100 and a part of the upper end side of the lower floor drain pipe 530 so as to encompass the part that exhibits thermal expansion function in the lower floor drain pipe 530, and is provided with a shape maintaining mechanism that maintains the cylindrical shape even in the event of a fire, and a fall prevention mechanism that prevents the heat-resistant mat itself from falling. Specifically, the state shown in Figure 2(A) is transitioned to the state shown in Figure 2(B).

[0058] Next, the heat-resistant mat 150 is placed across the drain pipe joint 100 and the lower floor drain pipe 530, and the drain pipe member 10 is then installed in the through hole. Next, after the drainage pipe member 10 is installed in the through hole, a filler material M is filled between the outer peripheral surface of the drainage pipe member 10 and the inner peripheral surface of the through hole. In this manner, a construction method for a drainage piping component 10 including a drainage pipe joint 100 can be carried out, and a fire compartment structure using a drainage piping component 10 including a drainage pipe joint 100 can be realized.

[0059] Here, unlike the above-described construction method, the drain pipe joint 100 without the heat-resistant mat 150 may be installed in the through-hole, and then the heat-resistant mat 150 may be installed as shown in Figure 2(B) so as to straddle the drain pipe joint 100 and the lower floor drain pipe 530. In this way, the order of the construction procedure is not limited in the present invention. It should be noted that the embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0060] The present invention is preferred for drainage piping components and their installation methods that are installed through the floor slab S of a building, and for fire compartment structures, and is particularly preferred in that it can realize a fire compartment structure in a floor slab with a through hole in a building without increasing the amount of thermal expansion material used. [Explanation of symbols]

[0061] 10, 20, 30, 40, 50 Drainage piping components 100 (First embodiment) Drainage pipe joint (made of cast iron) 200 (Second embodiment) Drainage pipe (made of non-fireproof synthetic resin) 300 (Related to the third embodiment) Drainage pipe (made of fire-resistant synthetic resin) 400 (Fourth embodiment) Drainage pipe joint (made of non-fireproof synthetic resin) 500 (pertaining to the fifth embodiment) Drainage pipe joint (made of non-fireproof synthetic resin) 150, 250, 350, 550 Heat-resistant mat 210 Thermal expansion material 120 Upper riser connection 130 Drain pipe connection 140 Horizontal branch pipe connection 520 Upper floor drain pipe 530 Lower floor drain pipe

Claims

1. A drainage piping member used for drainage piping that penetrates the floor slab of a building, a drain pipe or drain pipe fitting disposed within the through-hole in the floor slab; A lower floor drainage pipe provided below the through hole; A heat-resistant mat is provided in a cylindrical shape on the outer circumferential surface of the drain pipe, the drain pipe joint, or the lower floor drain pipe so as to contain the portion of the drain pipe, the drain pipe joint, or the lower floor drain pipe that exhibits a thermal expansion function, The lower floor drain pipe may be the same as the drain pipe, The heat-resistant mat is A drainage piping component formed by intertwining inorganic fibers of a predetermined length with a heat-resistant temperature of 800°C or higher, and equipped with a shape-maintaining mechanism that maintains the cylindrical shape even in the event of a fire, and a fall prevention mechanism that prevents the heat-resistant mat itself from falling.

2. The drain pipe joint is made of cast iron, The lower floor drain pipe is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separately from the pipe body, The drainage piping member according to claim 1 , wherein the fall prevention mechanism is realized by fixing the heat-resistant mat to the cast iron drainage pipe joint.

3. The drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separately from the pipe body, The drainage piping member according to claim 1 , wherein the fall prevention mechanism is realized by fixing the heat-resistant mat to the floor slab.

4. The drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separately from the pipe body, The drainage piping member according to claim 1 , wherein the fall prevention mechanism is realized by embedding at least a portion of the heat-resistant mat in the floor slab.

5. The heat-resistant mat is formed into a cylindrical shape by wrapping a flat nonwoven fabric mat around the outer circumferential surface of the drain pipe, the drain pipe joint, or the lower floor drain pipe, The drainage piping member according to any one of claims 1 to 4, wherein the shape maintaining mechanism has a function of preventing the cylindrical shape from returning to the flat shape.

6. The drainage piping member described in claim 5, wherein the shape maintenance mechanism has the function of preventing the cylindrical shape from returning to the flat shape by using a joining member to join the ends of the cylindrically formed nonwoven fabric mat, by using a wrapping member to wrap around the outer periphery of the cylindrically formed nonwoven fabric mat once around, or by burying the heat-resistant mat in the floor slab.

7. The drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separately from the pipe body, The drainage piping member further includes a resin cover that covers the outer periphery of the heat-resistant mat and is integrated with the drainage pipe, the drainage pipe joint, or the lower floor drainage pipe; The drainage piping member according to claim 1 , wherein the fall prevention mechanism is realized by fixing the heat-resistant mat to the resin cover.

8. The drainage piping member according to claim 7 , wherein the fall prevention mechanism is realized by fixing the heat-resistant mat to the resin cover at a position above the portion exhibiting the thermal expansion function.

9. A drainage piping member as described in claim 7 or claim 8, wherein the fall prevention mechanism is realized by engaging a locking portion provided on the inner surface of the resin cover with a locking portion provided on the outer surface of the heat-resistant mat.

10. The drainage piping member according to claim 9 , wherein the engaging portion is a protrusion, and the engaged portion is a groove that is engaged with the protrusion.

11. A drainage piping component according to any one of claims 7 to 10, wherein the resin cover is integrated with the drainage pipe, the drainage pipe joint or the lower floor drainage pipe by a watertight gasket.

12. The drainage piping member according to any one of claims 5 to 11, wherein the heat-resistant mat, which is wrapped around the outer peripheral surface and formed into a cylindrical shape, has a tapered portion whose diameter becomes smaller as it goes downward.

13. The drainage piping member according to any one of claims 1 to 12, wherein the inorganic fibers are silica fibers.

14. A drainage piping member used for drainage piping that penetrates the floor slab of a building, a drain pipe or drain pipe fitting disposed within the through-hole in the floor slab; A lower floor drainage pipe provided below the through hole; A heat-resistant mat is provided in a cylindrical shape on the outer circumferential surface of the drain pipe, the drain pipe joint, or the lower floor drain pipe so as to contain the portion of the drain pipe, the drain pipe joint, or the lower floor drain pipe that exhibits a thermal expansion function, The lower floor drain pipe may be the same as the drain pipe, The heat-resistant mat is formed by intertwining inorganic fibers and has a fall prevention mechanism that prevents the heat-resistant mat itself from falling. The drain pipe or the drain pipe joint is made of a fire-resistant synthetic resin containing a thermal expansion material or a non-fire-resistant synthetic resin provided with a thermal expansion material separately from the pipe body, The drainage piping component further includes a resin cover that covers the outer periphery of the heat-resistant mat and is integrated with the drain pipe, the drain pipe fitting, or the lower floor drain pipe.

15. The drainage piping member according to claim 14, wherein the fall prevention mechanism is realized by fixing the heat-resistant mat to the resin cover.

16. The drainage piping member according to claim 14 or 15, wherein the inorganic fibers are glass wool fibers.

17. The drainage piping member according to any one of claims 14 to 16, wherein the drainage pipe or the drainage pipe joint is made of polyvinyl chloride.

18. a floor slab having a through hole formed therein; The drainage piping member according to any one of claims 1 to 17, which is provided so as to penetrate the through hole; A fire compartment structure using a drainage piping member, comprising a filler material filled between the outer peripheral surface of the drainage piping member and the inner peripheral surface of the through hole.

19. 20. The fire compartment structure of claim 18, wherein the floor slab forms the bottom floor.

20. A construction method for constructing the drainage piping member according to any one of claims 1 to 17 on a floor slab having a through hole formed therein, The heat-resistant mat is provided in a cylindrical shape on the outer circumferential surface of the drain pipe, the drain pipe joint, or the lower floor drain pipe so as to enclose the portion of the drain pipe, the drain pipe joint, or the lower floor drain pipe that exhibits a thermal expansion function, and is provided with a shape maintaining mechanism that maintains the cylindrical shape even in the event of a fire, and a fall prevention mechanism that prevents the heat-resistant mat itself from falling; Installing the drainage piping member in the through hole; A method for installing a drainage piping member, comprising the step of filling a filler material between an outer peripheral surface of the drainage piping member and an inner peripheral surface of the through hole.

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