Joints, building

Abstract

To provide a collective joint which allows a refractory material to exhibit the function regardless of the position of the collective joint relative to a floor slab.SOLUTION: A collective joint 100 comprises a collection part 10 having a vertical pipe connection part 11 at which a vertical pipe is disposed and a horizontal pipe connection part 12 at which a horizontal pipe P3 is disposed, a main pipe part 20 disposed at the bottom of the collection part 10, a sound insulation cover 40 disposed on the outer periphery of at least any one of the collection part 10 and the main pipe part 20, an upper side refractory material 50 disposed below the horizontal pipe connection part 12, and a lower side refractory material 60 disposed below the upper side refractory material 50 with a space apart from the upper side refractory material 50.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a collective joint.

Background Art

[0002] In a single-pipe drainage system used in buildings such as condominiums and hotels, a collective joint that guides the drainage of each floor to a riser pipe is used. The collective joint is buried and arranged in the floor slab of the building. At this time, when a fire breaks out in the building, smoke and toxic gases enter the upper floors through the collective joint and the riser pipe. Therefore, in order to seal the inside of the collective joint during a fire, the collective joint is provided with a heat-expandable refractory material. In the drainage pipe structure described in Patent Document 1, the heat-expandable refractory material is embedded in a recess provided on the outer surface of the collective joint.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a collective joint, the refractory material is generally arranged below the collective part having a part (horizontal pipe connection part) for connecting horizontal branches. Also, the collective joint generally pipes with the horizontal pipe connection part in a state of almost contacting the floor slab. Then, the refractory material will be located inside in the thickness direction (axial direction) of the floor slab. As a result, when the refractory material expands during a fire, the expansion of the refractory material toward the outside of the collective joint is suppressed by the floor slab. As a result, the refractory material expands so as to crush the inside of the collective joint, closing the inside of the collective joint.

[0005] In contrast, when connecting a P-type toilet (horizontal drain toilet) to a manifold joint, for example, the horizontal pipe connection of the manifold joint may be routed at a position (for example, 150 mm) above the floor slab. In this case, the fire-resistant material, which is positioned as described above, may not be located inside the floor slab in the thickness direction. This presents a problem in that, in the event of a fire, the expansion of the fire-resistant material may prevent it from sealing the manifold joint.

[0006] The present invention has been made in view of the circumstances described above, and aims to provide a joint that can perform the function of a fire-resistant material regardless of the position of the joint relative to the floor slab. [Means for solving the problem]

[0007] To solve the aforementioned problems, the present invention proposes the following means. The manifold joint according to the present invention comprises a manifold section having a riser pipe connection section where a riser pipe is arranged and a horizontal pipe connection section where a horizontal pipe is arranged; a main pipe section arranged at the lower part of the manifold section; an upper fire-resistant material arranged below the horizontal pipe connection section; and a lower fire-resistant material arranged below the upper fire-resistant material at a distance from the upper fire-resistant material.

[0008] According to this invention, a lower fire-resistant material is provided below the upper fire-resistant material, spaced apart from the upper fire-resistant material. As a result, even if the position of the joint is vertical relative to the floor slab, at least one of the upper or lower fire-resistant material will be located inside the floor slab. Therefore, the fire-resistant material can perform its function regardless of the position of the joint relative to the floor slab. Consequently, there is no need to prepare different types of products depending on the position of the joint, and the product lineup can be reduced. By spacing out the upper and lower fire-resistant materials, the amount of fire-resistant material used can be reduced compared to the case where the upper and lower fire-resistant materials are arranged continuously in the axial direction without distinction. Therefore, sufficient fire resistance can be ensured while keeping costs down.

[0009] Furthermore, the system may further include a sound-insulating cover disposed on the outer circumference of at least one of the manifold section and the main pipe section, and the lower fire-resistant material may be disposed on the inner surface of the sound-insulating cover.

[0010] According to this invention, the lower fire-resistant material is positioned on the inner surface of the sound-insulating cover. This allows the lower fire-resistant material to be fixed in place by the sound-insulating cover, pressing it against the main pipe. Therefore, the lower fire-resistant material can be fixed without the need to prepare separate fixing members.

[0011] Furthermore, the system may further include a sound-insulating cover disposed on the outer circumference of at least one of the manifold section and the main pipe section, and the lower fire-resistant material may be disposed on the outside of the sound-insulating cover.

[0012] According to this invention, the lower fire-resistant material is positioned on the outside of the sound-insulating cover. This allows the position of the lower fire-resistant material to be visually inspected after the joint is attached to the floor slab. Therefore, the installation status of the lower fire-resistant material can be easily confirmed.

[0013] Furthermore, the system may further include a sound-insulating cover disposed on the outer circumference of at least one of the manifold section and the main pipe section, and the lower fire-resistant material may be disposed inside the sound-insulating cover in the thickness direction.

[0014] According to this invention, the lower fire-resistant material is positioned inside the sound insulation cover in the thickness direction. This allows the lower fire-resistant material to be installed simply by installing the sound insulation cover. Furthermore, it prevents the lower fire-resistant material from shifting position between the sound insulation cover and the main pipe section.

[0015] Furthermore, the lower fire-resistant material may be arranged in a manner that covers 40% or more of the circumferential direction of the main pipe section.

[0016] According to this invention, the lower fire-resistant material is placed on more than 40% of the circumference of the main pipe. By not providing the lower fire-resistant material around the entire circumference of the main pipe in this way, sufficient fire resistance can be ensured while keeping costs down.

[0017] Further, the axial dimension of the upper refractory material may be 20 mm or more and 160 mm or less, the axial dimension of the lower refractory material may be 20 mm or more and 80 mm or less, and the axial interval between the upper refractory material and the lower refractory material may be 10 mm or more and 70 mm or less.

[0018] According to this invention, the axial dimension of the upper refractory material is 20 mm or more and 160 mm or less, the axial dimension of the lower refractory material is 20 mm or more and 80 mm or less, and the axial interval between the upper refractory material and the lower refractory material is 10 mm or more and 70 mm or less. Here, it is common for the floor slab used in a building to have a thickness of at least 75 mm or more. In contrast, by setting the dimensions of the upper and lower refractory materials and the interval therebetween to the above-described relationship, even when the axial position of the collective joint is shifted with respect to the floor slab, at least a part of the upper refractory material or the lower refractory material can be positioned inside the floor slab. Thereby, the axial position of the collective joint with respect to the floor slab can be freely set.

Advantages of the Invention

[0019] According to the present invention, it is possible to provide a collective joint that can exhibit the function of the refractory material regardless of the position of the collective joint with respect to the floor slab.

Brief Description of the Drawings

[0020] [Figure 1] It is a first installation example of a collective joint provided with a lower refractory material on the inner peripheral surface of a sound insulation cover. [Figure 2] It is a modified example in which the inclined pipe portion of the main pipe portion is not provided with a sound insulation cover. [Figure 3] It is a modified example of the upper refractory material and the lower refractory material. [Figure 4] It is a first example in which the lower refractory material is arranged on the outer peripheral surface of the main pipe portion. [Figure 5] It is a second example in which the lower refractory material is arranged on the outer peripheral surface of the main pipe portion. [Figure 6] It is a first example of the lower refractory material. [Figure 7] It is a second example of the lower refractory material. [Figure 8] This is an installation example of a collective joint provided with a lower refractory material on the outer peripheral surface of a sound insulation cover. [Figure 9] This is a schematic diagram of the case where a lower refractory material is provided inside the sound insulation cover in the thickness direction. [Figure 10] This is a second installation example of a collective joint provided with a lower refractory material on the inner peripheral surface of a sound insulation cover. [Figure 11] This is a modified example of the mortar disposed between the floor slab and the collective joint. [Figure 12] This is a modified example of the shape of the floor slab. [Figure 13] This is a diagram showing the dimensions of the upper refractory material, the lower refractory material, the interval therebetween, and the positional relationship with the floor slab.

Mode for Carrying Out the Invention

[0021] Hereinafter, a collective joint 100 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the collective joint 100 according to the present embodiment is used in a single-pipe drainage system of a building having a plurality of floors. The collective joint 100 is disposed (embedded) inside a through hole H provided in a floor slab S of the building. Mortar M is filled between the collective joint 100 and the floor slab S.

[0022] In the collective joint 100 according to the present embodiment, the upper refractory material 50 or the lower refractory material 60 is heated and expanded at the time of a fire. Thereby, the inside of the collective joint 100 is blocked, and it is possible to prevent the smoke from moving to the upper floors through the inside of the collective joint 100. Thereby, the fire resistance performance in the building is ensured. The collective joint 100 includes a collective part 10, a main pipe part 20, a connecting pipe part 30, a sound insulation cover 40, an upper refractory material 50, and a lower refractory material 60.

[0023] In the following explanation, the direction along the central axis O of the connecting pipe section 30 is referred to as the axial direction, the side of the connecting pipe section 30 along the axial direction that is towards the manifold section 10 is referred to as the upward direction, and the side that is towards the main pipe section 20 is referred to as the downward direction. Furthermore, in a plan view from the axial direction, the direction perpendicular to the central axis O is referred to as the radial direction, and in a plan view from the axial direction, the direction that circles around the central axis O is referred to as the circumferential direction.

[0024] The manifold 10 is configured to accommodate either the first riser pipe P1 or the horizontal pipe P3. Specifically, the end of the first riser pipe P1 or the end of the horizontal pipe P3 is inserted into the manifold 10. The manifold 10 comprises a riser pipe connection 11, a horizontal pipe connection 12, a water collection chamber 13, and a main pipe connection 14. The riser connection section 11 is where the first riser pipe P1 is positioned. The riser connection section 11 is located above the manifold section 10. As shown in Figure 1, the riser connection section 11 is a socket into which the first riser pipe P1 is inserted.

[0025] The horizontal pipe connection section 12 is where the horizontal pipe P3 is positioned. The horizontal pipe connection section 12 is located radially outward from the manifold section 10. As shown in Figure 1, the horizontal pipe connection section 12 is a socket into which the horizontal pipe P3 is inserted. The manifold section 10 may have only one horizontal pipe connection section 12, or it may have multiple horizontal pipe connection sections 12. As shown in Figure 1, horizontal connecting pipes 12a are attached to the radial outer end of the horizontal pipe connection section 12, to which each horizontal pipe P3 is connected separately. The outer diameter of the horizontal connecting pipes 12a is larger than the outer diameter of the horizontal pipe connection section 12.

[0026] The water collection chamber 13 is the part where wastewater flowing in from the first vertical pipe P1 and horizontal pipe P3 via the vertical pipe connection 11 and horizontal pipe connection 12 is collected. As shown in Figure 1, the water collection chamber 13 is equipped with a flow straightening plate 13a to regulate the flow of wastewater inside the water collection chamber 13. The main pipe connection section 14 is located below the manifold section 10. As shown in Figure 1, the main pipe connection section 14 is connected to the main pipe section 20 via the connecting pipe section 30. The main pipe connection section 14 is a socket to which the connecting pipe section 30 is connected.

[0027] The assembly portion 10 is, for example, a component integrally molded from a resin composition by injection molding or the like. Examples of resins constituting the resin composition include polyolefin resins such as polyethylene resins and polypropylene resins, ABS resins, and polyvinyl chloride resins, with polyvinyl chloride resins being preferred. "Polyolefin resin" means a resin consisting solely of polyolefin, or, in the case of a resin containing multiple types of resins, a resin in which polyolefin is the most abundant resin. Similarly, "polyvinyl chloride resin" means a resin consisting solely of polyvinyl chloride, or, in the case of a resin containing multiple types of resins, a resin in which polyvinyl chloride is the most abundant resin.

[0028] The main pipe section 20 is located at the lower part of the manifold section 10. The main pipe section 20 has an upper connecting section 21, an inclined pipe section 22, and a lower connecting section 23. The upper connection section 21 is located near the upper end of the main pipe section 20 and connects to the lower part of the manifold section 10. The inclined pipe section 22 is located below the upper connection section 21 and gradually decreases in diameter as it extends downward from the upper connection section 21. That is, the main pipe section 20 gradually narrows downward from the manifold section 10. The lower connection section 23 extends downward from the lower end of the inclined pipe section 22 and connects to the second riser pipe P2.

[0029] The outer diameter of the upper connection section 21 is the same as the outer diameter of the main pipe connection section 14 of the manifold section 10. The outer diameter of the inclined pipe section 22 at its lower end is smaller than the outer diameter of the upper connection section 21. The axial size of the inclined pipe section 22 is larger than the axial size of the upper connection section 21. The upper connection section 21 receives the connecting pipe section 30 from above and connects to the connecting pipe section 30. In other words, the upper connection section 21 is a socket to which the connecting pipe section 30 is connected.

[0030] The outer diameter of the lower connection portion 23 is smaller than the outer diameter of the upper connection portion 21, and larger than the outer diameter of the lower end of the inclined pipe portion 22. The axial size of the lower connection portion 23 is smaller than the axial size of the upper connection portion 21. The lower connection portion 23 receives the second riser pipe P2 from below and connects to the second riser pipe P2. In other words, the lower connection portion 23 is a socket to which the second riser pipe P2 is connected.

[0031] The upper connecting portion 21 may be integrally molded with the inclined pipe portion 22, or they may be molded separately and then connected. The inclined pipe section 22 can be manufactured, for example, by injection molding a resin composition. The resin composition constituting the inclined pipe section 22 is the same as the resin composition constituting the manifold section 10. As shown in Figure 1, the inner circumferential surface of the inclined pipe section 22 may be provided with an inclined section flow straightening plate 22a to regulate the drainage flow inside the main pipe section 20. The lower connecting portion 23 can be manufactured, for example, by injection molding a resin composition. The resin composition constituting the lower connecting portion 23 is the same as the resin composition constituting the assembly portion 10. The inclined pipe section 22 and the lower connecting section 23 may be a single molded product, or they may be molded separately and then connected.

[0032] The connecting pipe section 30 connects the manifold section 10 and the main pipe section 20. The connecting pipe section 30 is a cylindrical member. The upper part of the connecting pipe section 30 is positioned inside the main pipe connection section 14 of the manifold section 10. The lower part of the connecting pipe section 30 is positioned inside the upper connection section 21 of the main pipe section 20. This connects the manifold section 10 and the main pipe section 20. The manifold section 10 and the main pipe section 20 are connected to each other by adhesive or the like. In this embodiment, the manifold joint 100 has a manifold portion 10 and a main pipe portion 20, but the manifold joint 100 may also have members other than the manifold portion 10 and the main pipe portion 20.

[0033] The sound insulation cover 40 is positioned on the outer circumference of at least one of the manifold section 10 and the main pipe section 20. As shown in Figure 1, the sound insulation cover 40 is positioned from the top to the bottom of the manifold section 10 and from the top to the bottom of the main pipe section 20. Alternatively, as shown in Figure 2, the sound insulation cover 40 may be positioned only on the manifold section 10 and not on the main pipe section 20. Or, the sound insulation cover 40 may be omitted only in the parts located inside the mortar M. The sound insulation cover 40 is positioned to wrap around the manifold 10 and the main pipe section 20 and is secured with tape T. In addition, a branch cover 10c is positioned at the upper end of the riser pipe connection section 11 of the manifold 10. The sound insulation cover 40 comprises sound-absorbing material 41 and sound-insulating material 42.

[0034] The sound-absorbing material 41 is made of fibers such as glass wool, rock wool, or felt. The fiber density is 40 kg / m³. 3 The above is preferable. In addition, rock wool with particularly high fire resistance is preferably used. The sound-absorbing material 41 absorbs the sound associated with drainage generated inside the manifold 10 and the main pipe section 20. This prevents drainage sounds from leaking into the living spaces of the building.

[0035] The sound-absorbing material 41 is, for example, in the form of a sheet. Therefore, when attaching the sound-absorbing material 41 to the manifold 10 and the main pipe section 20, it is attached by wrapping it around the main pipe section 20. Furthermore, as mentioned above, the sound-absorbing material 41 is made of fibers. In this case, it may be difficult to connect the sound-absorbing materials 41 together when wrapping and fixing the sound-absorbing material 41 around the manifold 10 and the main pipe section 20. In this case, a decorative layer may be provided on the outside of the manifold 10 or the main pipe section 20. For example, aluminum kraft paper or aluminum glass cloth is preferably used as the decorative layer. This allows adhesive tape or the like to be attached to the decorative layer. Thus, it becomes easier to connect the sound-absorbing materials 41 together.

[0036] The sound insulation material 42 is installed on the outside of the sound absorption material 41. The sound insulation material 42 is made of, for example, an olefin-based elastomer such as EPDM, soft PVC, or asphalt sheet. The sound insulation material 42 blocks sound that could not be absorbed by the sound absorption material 41. This makes it less likely for drainage sounds to leak into the living spaces of the building.

[0037] The sound insulation material 42 is, for example, in the form of a sheet. When attaching the sound insulation material 42 to the manifold 10 and the main pipe section 20, it is attached by wrapping it around the manifold 10 and the main pipe section 20. Furthermore, the sound insulation material 42 may be pre-formed into a tubular shape to match the shape of the manifold 10 and the main pipe section 20. This makes it easier to attach to the manifold 10 and the main pipe section 20 compared to when it is in sheet form.

[0038] When attaching the sound-absorbing material 41 and the sound-insulating material 42 to the manifold 10 and the main pipe section 20, the sound-absorbing material 41 and the sound-insulating material 42 may be fixed in advance with adhesive or double-sided tape. In this case, it is preferable that the sound-insulating material 42 be in sheet form. This allows the sound-insulating cover 40 to be attached to the manifold 10 and the main pipe section 20 at once, thereby reducing the work time.

[0039] The upper fire-resistant material 50 is positioned below the horizontal pipe connection 12. Specifically, for example, it is positioned to wrap around the outer circumference of the main pipe connection 14. For example, thermally expandable graphite is used for the upper fire-resistant material 50. For example, the upper fire-resistant material 50 is a sheet-like material. When a fire occurs in the building, the upper fire-resistant material 50 is heated and expands. At this time, the upper fire-resistant material 50 expands toward the inside of the manifold 10, deforming and sealing the inside of the manifold 10. This prevents smoke and other debris from moving to the upper floors through the inside of the manifold joint 100. Alternatively, instead of providing an upper fire-resistant material 50, the material of the connecting pipe section 30 may be made to include the material of the fire-resistant material, as shown in Figure 3, thereby creating the upper fire-resistant material 50. In other words, the function of the upper fire-resistant material 50 can be provided without providing a separate upper fire-resistant material 50.

[0040] The lower fire-resistant material 60 is positioned below the upper fire-resistant material 50, with a gap between them. Specifically, for example, as shown in Figure 1, it is positioned on the outer surface of the inclined pipe section 22 of the main pipe section 20. When the lower fire-resistant material 60 is positioned on the outer surface of the inclined pipe section 22, it does not affect the outer diameter of the manifold joint 100, and therefore can be positioned without affecting the inner diameter of the through-hole H in the floor slab S. For example, thermally expandable graphite is used for the lower fire-resistant material 60.

[0041] The lower fire-resistant material 60 is positioned over 40% of the circumferential length of the main pipe section 20. For example, as shown in Figure 4, the lower fire-resistant material 60 may be provided only in a portion of the circumferential length of the main pipe section 20. Alternatively, as shown in Figure 5, multiple pieces of the lower fire-resistant material 60 may be provided at intervals around the circumferential length of the main pipe section 20. The circumferential dimension of the lower fire-resistant material 60 is preferably 30 mm or more, and more preferably 50 mm or more. Alternatively, instead of providing a separate lower fire-resistant material 60, the lower fire-resistant material 60 may be made by incorporating the fire-resistant material into the material of the second riser pipe P2, as shown in Figure 3. In other words, the function of a lower fire-resistant material 60 may be provided without the need for a separate lower fire-resistant material 60.

[0042] In this embodiment, the lower fire-resistant material 60 is a sheet-like member. When attaching the lower fire-resistant material 60 to the inclined pipe section 22 of the main pipe section 20 in the circumferential direction, it is preferable to provide a notch K1 below the lower fire-resistant material 60, as shown in Figure 6. This prevents wrinkles from forming below the lower fire-resistant material 60 when the sheet-like lower fire-resistant material 60 is attached to the inclined pipe section 22. Alternatively, a V-shaped notch K2 may be provided, as shown in Figure 7. In this case, when manufacturing the lower fire-resistant material 60 from a sheet-like base material, the lower fire-resistant material 60 can be formed on the upper and lower sides, as shown in Figure 7. Therefore, the yield can be improved.

[0043] The lower fire-resistant material 60 may be placed on the inner circumferential surface of the sound-insulating cover 40, as shown in Figure 1. In this case, the lower fire-resistant material 60 can be fixed by sandwiching it between the outer circumferential surface of the main pipe section 20 and the inner circumferential surface of the sound-insulating cover 40. The lower fire-resistant material 60 may be placed outside the sound insulation cover 40, as shown in Figure 8. In this case, the lower fire-resistant material 60 may be visually inspected from the outside during construction to serve as a guide for the mounting position of the manifold joint 100 to the floor slab S. Alternatively, as shown in Figure 2, the sound insulation cover 40 may not be placed on the outer surface of the main pipe section 20, and only the lower fire-resistant material 60 may be provided on the outer surface of the main pipe section 20.

[0044] Alternatively, as shown in Figure 9, the lower fire-resistant material 60 may be placed inside the sound insulation cover 40 in the thickness direction. In other words, the lower fire-resistant material 60 may be embedded inside the sound insulation cover 40. In this case, the lower fire-resistant material 60 is positioned at the same time as the sound insulation cover 40 is installed. Furthermore, the outer surface of the sound insulation cover 40 may be marked with ink, a sticker, or the like so that the position of the lower fire-resistant material 60 inside the sound insulation cover 40 can be visually confirmed.

[0045] The manifold joint 100, having the above configurations, is installed in the building's floor slab S and positioned inside the through-hole H, as described above. In this case, the axial position of the manifold joint 100 relative to the floor slab S can take the following forms. That is, as shown in Figure 1, the distance between the horizontal pipe connection portion 12 of the manifold joint 100 and the floor slab S is short, and as shown in Figure 10, the distance between the horizontal pipe connection portion 12 of the manifold joint 100 and the floor slab S is long. Generally, it is positioned as shown in Figure 1. The configuration shown in Figure 10 is used, for example, when the horizontal pipe P3 connected to the horizontal pipe connection portion 12 is connected to a P-type toilet (horizontal drain toilet).

[0046] In the configuration shown in Figure 1, the upper fire-resistant material 50 is located inside the through-hole H of the floor slab S, and the lower fire-resistant material 60 is located outside the through-hole H. In contrast, in the configuration shown in Figure 10, the lower fire-resistant material 60 is located inside the through-hole H of the floor slab S, and the upper fire-resistant material 50 is located outside the through-hole H. By providing the upper fire-resistant material 50 and the lower fire-resistant material 60 with an axial gap between them, the same joint 100 can accommodate both the configurations shown in Figures 1 and 10.

[0047] Here, the axial thickness of a floor slab S used in a typical building is 75 mm in its thinnest case. A 75 mm floor slab S is assumed to be a deck plate used as flooring material for low-rise, simple buildings (such as prefabricated buildings). Furthermore, in order to seal the inside of the manifold 10 or main pipe section 20 by the expansion of the fire-resistant material in the event of a fire, it is preferable that either the upper fire-resistant material 50 or the lower fire-resistant material 60 be embedded at least 5 mm, and more preferably 30 mm or more, inside the thickness direction of the floor slab S.

[0048] Furthermore, as shown in Figure 11, even if the floor slab S is relatively thick, the mortar M filled into the through-hole H may be thin. Alternatively, as shown in Figure 12, if the floor slab S has an uneven shape, the thickness of the floor slab S and mortar M in the area where the through-hole H is provided may be thin. In this case, the dimensions in which the upper fire-resistant material 50 and lower fire-resistant material 60 are embedded should be considered based on the thickness of the mortar M.

[0049] In this embodiment, the axial dimension of the upper fire-resistant material 50 is 20 mm or more and 160 mm or less, with 90 mm being the most preferred dimension. The axial dimension of the lower fire-resistant material 60 is 20 mm or more and 80 mm or less, with 50 mm being the most preferred dimension. The axial distance between the upper fire-resistant material 50 and the lower fire-resistant material 60 is 10 mm or more and 70 mm or less, with 40 mm being the most preferred dimension.

[0050] The axial dimensions between the upper fire-resistant material 50 and the lower fire-resistant material 60, and the axial distance between the upper fire-resistant material 50 and the lower fire-resistant material 60 in the manifold joint 100 according to this embodiment will be explained below with reference to Figure 13. As shown in Figure 13, in the positional relationship between the manifold joint 100 and the floor slab S, the lowest position of the manifold joint 100 relative to the floor slab S is when the horizontal pipe connection part 12 is in contact with the upper surface of the floor slab S. Hereafter, this position will be referred to as the lowest point. The highest position of the manifold joint 100 relative to the floor slab S is the highest position of the horizontal pipe P3 connected to the P-type toilet. In the case of a commonly used P-type toilet, the height of the horizontal pipe P3 is, in its highest case, 130 mm upward in the axial direction from the lowest point mentioned above. In this embodiment, we considered a position where the manifold joint 100 is moved 150 mm upward in the axial direction from the lowest point mentioned above.

[0051] As shown in Figure 13, the upper end of the upper fire-resistant material 50 is positioned to align with the lower end of the horizontal pipe connection 12. The axial dimension of the upper fire-resistant material 50 is set to 90 mm. The upper end of the lower fire-resistant material 60 is positioned 40 mm axially from the lower end of the upper fire-resistant material 50. The axial dimension of the lower fire-resistant material 60 is set to 50 mm. At this time, up to a position where the manifold joint 100 is moved 60 mm upward in the axial direction from its lowest point, the lower 30 mm of the upper fire-resistant material 50 will be located inside the floor slab S, thus satisfying the above requirements.

[0052] Furthermore, when the manifold joint 100 is moved 55 mm upward in the axial direction from its lowest point, the lower surface of the floor slab S coincides with the upper end of the lower fire-resistant material 60. Therefore, after the distance moved from the lowest point of the manifold joint 100 exceeds 60 mm, and the dimensions of the upper fire-resistant material 50 located inside the floor slab S become 30 mm or less, the lower fire-resistant material 60 will be located inside the floor slab S. Thus, the dimensions of the fire-resistant material located inside the floor slab S can be ensured to be 30 mm or more when combining both the upper fire-resistant material 50 and the lower fire-resistant material 60. For this reason, as shown in Figure 13, the above requirements can be met until the manifold joint 100 is moved 150 mm upward in the axial direction from its lowest point, at which point only the lower 30 mm of the lower fire-resistant material 60 is located inside the floor slab S.

[0053] Furthermore, regarding the dimensional range of the upper fire-resistant material 50 and the lower fire-resistant material 60, let's consider the case where the axial dimensions of both the upper fire-resistant material 50 and the lower fire-resistant material 60 are set to the minimum within the range of 20 mm. Even in this case, if the distance between the upper fire-resistant material 50 and the lower fire-resistant material 60 is 70 mm or less, which is the upper limit within the range mentioned above, then since the minimum dimension of the floor slab S is 75 mm, at least 5 mm of either the upper fire-resistant material 50 or the lower fire-resistant material will be embedded inside the floor slab S. Therefore, the above requirements can be met.

[0054] As described above, the manifold joint 100 according to this embodiment includes a lower fire-resistant material 60 positioned below the upper fire-resistant material 50, with a gap between them. As a result, even if the position of the manifold joint 100 changes vertically relative to the floor slab S, at least one of the upper fire-resistant material 50 and the lower fire-resistant material 60 will be located inside the floor slab S. Therefore, the fire-resistant material can perform its function regardless of the position of the manifold joint 100 relative to the floor slab S. Consequently, there is no need to prepare different types of products depending on the position of the manifold joint 100, and the product lineup can be reduced. By providing the upper fire-resistant material 50 and the lower fire-resistant material 60 with a gap between them, the amount of fire-resistant material used can be reduced compared to the case where the upper fire-resistant material 50 and the lower fire-resistant material 60 are arranged continuously in the axial direction without distinction. Therefore, sufficient fire resistance can be ensured while keeping costs down.

[0055] Furthermore, the lower fire-resistant material 60 is positioned on the inner surface of the sound-insulating cover 40. This allows the lower fire-resistant material 60 to be fixed in place by the sound-insulating cover 40, pressing it against the main pipe section 20. Therefore, the lower fire-resistant material 60 can be fixed without the need to prepare separate fixing members.

[0056] Furthermore, the lower fire-resistant material 60 is positioned on the outside of the sound-insulating cover 40. This allows the position of the lower fire-resistant material 60 to be visually inspected after the joint 100 is attached to the floor slab S. Therefore, the installation status of the lower fire-resistant material 60 can be easily confirmed.

[0057] Furthermore, the lower fire-resistant material 60 is positioned inside the sound insulation cover 40 in the thickness direction. This allows the lower fire-resistant material 60 to be installed simply by installing the sound insulation cover 40. In addition, it prevents the lower fire-resistant material 60 from shifting position between the sound insulation cover 40 and the main pipe section 20.

[0058] Furthermore, the lower fire-resistant material 60 is placed on more than 40% of the circumference of the main pipe section 20. By not providing the lower fire-resistant material 60 around the entire circumference of the main pipe section 20 in this way, sufficient fire resistance can be ensured while keeping costs down.

[0059] Furthermore, the axial dimension of the upper fire-resistant material 50 is 20 mm to 160 mm, the axial dimension of the lower fire-resistant material 60 is 20 mm to 80 mm, and the axial distance between the upper fire-resistant material 50 and the lower fire-resistant material 60 is 10 mm to 70 mm. Here, floor slabs S used in buildings are generally at least 75 mm thick. In contrast, by setting the dimensions of the upper fire-resistant material 50 and the lower fire-resistant material 60 and their distance to the above-described relationship, even if the axial position of the joint 100 is shifted relative to the floor slab S, at least a part of the upper fire-resistant material 50 or the lower fire-resistant material 60 can be positioned inside the floor slab S. This allows the axial position of the joint 100 relative to the floor slab S to be freely set.

[0060] It should be noted that the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention. For example, refractory materials such as thermally expandable graphite may be included in the materials of the manifold 10 and the main pipe section 20. Furthermore, a recess may be provided on the outer surface of the inclined pipe section 22 of the main pipe section 20 for arranging the lower fire-resistant material 60. The recess may also correspond to the shape of the inclined section rectifier plate 22a located inside the inclined pipe section 22. Furthermore, the upper fire-resistant material 50 may also be provided intermittently in the circumferential direction, as shown in Figure 4 or Figure 5, similar to the lower fire-resistant material 60. Furthermore, the manifold joint 100 may not have a connecting pipe section 30, and the manifold section 10 and the main pipe section 20 may be directly connected. For example, the main pipe connecting section 14 and the upper connecting section 21 may be fixed with adhesive. In addition, any of the above may be inserted into and fixed to either of the other.

[0061] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate. [Explanation of Symbols]

[0062] 10 Gathering area 11. Vertical pipe connection 12 Horizontal pipe connection 20 Main pipe section 40 Soundproof Cover 50 Upper refractory material 60 Lower refractory material 100 Manifold Joint P1 1st standpipe P2 2nd standpipe P3 horizontal pipe

Claims

1. A manifold comprising a vertical pipe connection section where a vertical pipe is arranged, and a horizontal pipe connection section where a horizontal pipe is arranged, and a main pipe section located below the manifold section and having an inclined flow straightening plate inside, An upper fire-resistant material containing thermally expandable graphite is placed between the lower part of the horizontal pipe connection and the upper end of the inclined section rectifier plate, Below the upper fire-resistant material, a lower fire-resistant material containing thermally expandable graphite is placed at a distance from the upper fire-resistant material, A sound-insulating cover is placed on the outer circumference of the main pipe section, Equipped with, The manifold includes a main pipe connection section that is connected to the main pipe section. The lower end of the upper fire-resistant material is provided above the upper end of the inclined section straightening plate. The upper end of the lower fire-resistant material is provided below the upper end of the inclined section straightening plate. The upper fire-resistant material is placed inside the sound-insulating cover. A joint in which at least a portion of the upper fire-resistant material or the lower fire-resistant material is located inside the floor slab.

2. The manifold joint according to claim 1, wherein the upper fire-resistant material is arranged on the outer circumference of the main pipe connection portion.

3. The manifold joint according to claim 1, wherein the upper fire-resistant material is formed into a cylindrical shape and is a connecting pipe that connects the main pipe connection portion and the main pipe portion.

4. The manifold joint according to any one of claims 1 to 3, wherein the lower fire-resistant material is provided at the outer periphery of the inclined flow straightening plate.

5. The manifold joint according to claim 1, wherein the lower fire-resistant material is a riser pipe containing fire-resistant material, located at the lower end of the main pipe section and below the lower end of the inclined section rectifier plate.

6. The manifold joint according to any one of claims 1 to 5, wherein the axial length of the upper fire-resistant material is 20 mm or more and 160 mm or less.

7. A building having multiple floors, comprising floor slabs separating the multiple floors, through holes provided in the floor slabs, and a joint according to any one of claims 1 to 5 arranged in the through holes, The aforementioned floor slab is equipped with a deck plate; this is a building.

8. A building having multiple floors, comprising floor slabs separating the multiple floors, through holes provided in the floor slabs, and a joint according to any one of claims 1 to 5 arranged in the through holes, A building in which the thickness of the aforementioned floor slab is 75 mm or more.

9. A building having multiple floors, comprising floor slabs separating the multiple floors, through holes provided in the floor slabs, and a joint according to any one of claims 1 to 5 arranged in the through holes, The aforementioned floor slab has an uneven underside, in this building.

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