Piping structure and thermal expansion material

Abstract

To provide a joint capable of blocking smoke and flame generated below.SOLUTION: A resin collective joint 1 which is configured to be insertable into a floor slab S and includes a plurality of branch pipes 3 comprises a resin upper member 12 protruding above the floor slab S with the collective joint 1 being inserted into the floor slab S, a plastic lower member 14 that is externally fitted and connected to the lower end of the upper member 12 and whose upper part is located inside the floor slab S and whose upper end protrudes from the top surface of the floor slab S and whose lower part protrudes below the floor slab S with the collective joint 1 being inserted into the floor slab S, a blade member 18 that is inclined with respect to the axis of the lower member 14, and a thermal expansion material 30 provided on the peripheral wall of the lower member 14. With the collective joint 1 being inserted into the floor slab S, the top end of the thermal expansion material 30 protrudes from the top surface of the floor slab S, and the thermal expansion material 30 is positioned to be buried within the floor slab S, and the bottom end of the thermal expansion material 30 is positioned lower than the top of the blade member 18.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to fittings, drainage systems and buildings. [Background technology]

[0002] In recent years, in multi-story buildings such as apartment buildings, wastewater discharged from sanitary equipment on each floor has been collected in a drainage standpipe installed in a pipe shaft via horizontal branch pipes from the sanitary equipment on each floor, and then discharged into a sewer via curved pipes and horizontal pipes. In drainage systems (hereinafter simply referred to as drainage systems) for discharging wastewater discharged from sanitary equipment on each floor into a sewer in this way, a collecting joint (joint) is used to connect the standpipes and horizontal branch pipes that make up the drainage standpipe, which have a main pipe to which the standpipes can be connected at each of the upper and lower ends, and branch pipes that are connected to the side of the main pipe and to which horizontal branch pipes can be connected.

[0003] Inside the above-mentioned manifold joint, a flow straightening blade is provided to smoothly straighten the inflowing wastewater by swirling or the like and allow it to flow downward (see, for example, Patent Document 1).

[0004] In recent years, due to the decrease in the number of workers who install drainage systems, a decline in technology, and the need to ensure the durability of the various pipe materials that make up drainage systems, the use of resin pipe materials, i.e., the use of resin drainage stems, has been promoted. By using resin for all of the standpipes, horizontal branch pipes, collecting joints, and leg joints, it is possible to create a drainage system that is lightweight and has excellent durability.

[0005] The resin joint is manufactured by injection molding and is composed of at least two members: an upper member that protrudes above the floor slab that divides the floors of the building, and a lower member that is embedded in the floor slab, and is configured by connecting these upper and lower members. The straightening vanes are composed of vane members and an annular member that supports the vane members, and are housed inside the lower member or inside a middle member that is interposed between the upper and lower members. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5483937 Summary of the Invention [Problem to be solved by the invention]

[0007] The above-mentioned resin joints are often made of non-fire-resistant resin and equipped with a thermal expansion material to provide fire resistance. Specifically, the thermal expansion material is attached to the outer periphery of the joint. When heat is applied from the outside, the joint itself quickly melts and disappears, and at the same time, the thermal expansion material expands, blocking the through-hole in the floor slab that was created to insert the joint. This prevents smoke and fire generated on the floor below (i.e., the lower floor) from spreading to the floor above (i.e., the upper floor).

[0008] For example, in the joint described in Patent Document 1, the thickness of the peripheral wall increases at the connection between the upper and lower members of a resin joint, and at the overlapping portion between the annular member supporting the swirl vane and the collective joint. Because these thicker peripheral wall sections are typically located above the floor slab, they are less susceptible to heat transfer and less likely to melt during a fire. In such cases, the thicker peripheral wall sections are difficult to block with thermally expansive fire-resistant material, creating the problem of being unable to block smoke and flames occurring on the floor below.

[0009] The present invention has been made in view of the above circumstances, and provides a joint that can effectively block smoke and flames generated below. [Means for solving the problem]

[0010] The joint of the present invention is a joint configured to be able to be inserted into a floor slab, and is equipped with a plurality of branch pipes. It comprises an upper member that protrudes above the floor slab when the joint is inserted into the floor slab, a lower member that is connected to the upper member and has an upper part that is embedded inside the floor slab and a lower part that protrudes below the floor slab when the joint is inserted into the floor slab, a straightening vane housed within the upper part of the lower member, and a thermal expansion material provided on the peripheral wall of the lower member, and is characterized in that when the joint is inserted into the floor slab, the upper end of the thermal expansion material is positioned lower than the upper end surface of the floor slab, and the lower end of the thermal expansion material is positioned lower than the upper end of the straightening vane.

[0011] According to the above-mentioned configuration, the straightening vanes are located at a height where heat is easily applied and inside the pipe of the joint, so they melt and disappear quickly when heat is applied, and the through-holes formed in the floor slab for inserting the joints are smoothly closed by the thermal expansion material, thereby effectively blocking smoke and flames generated below (i.e., on the lower floor).

[0012] In the above-mentioned joint, it is preferable that the width of the thermal expansion material in the height direction is 30 mm or more and 60 mm or less, and that the lower end of the thermal expansion material is arranged between a height of 30 mm below and a height of 100 mm below the upper end surface of the floor slab.

[0013] According to the above-mentioned configuration, the relative positions of the thermal expansion material and the straightening vanes are appropriate under the general condition that the thickness of the floor slab is 100 mm or more, so that the fire resistance performance of the joint is reliably exhibited. <1> A resin joint configured to be able to be inserted into a floor slab, a resin upper member that includes a plurality of branch pipes and protrudes above the floor slab when the joint is inserted into the floor slab; a resin lower member that is fitted onto the lower end of the upper member and connected thereto, and when the joint is inserted into the floor slab, an upper portion is located inside the floor slab, an upper end of the upper portion protrudes from the upper end surface of the floor slab, and a lower portion protrudes below the floor slab; a blade member located within the upper portion of the lower member and inclined with respect to an axis of the lower member; a thermal expansion material provided on a peripheral wall of the lower member; Equipped with When the joint is inserted into the floor slab, The thermal expansion material is disposed at a position where it is embedded inside the floor slab, A joint in which the lower end of the thermal expansion material is positioned lower than the upper end of the blade member. <2> When the joint is inserted into the floor slab, The upper end of the thermal expansion material is arranged at a position lower than the upper end surface of the floor slab. <1> The fitting described in <3> When the joint is inserted into the floor slab, The upper end of the thermal expansion material is positioned lower than the lower end of the upper member. <1> or <2> The fitting described in <4> A drainage system for a multi-story building, comprising: A horizontal branch pipe for draining wastewater discharged from sanitary equipment on each floor, A standpipe that constitutes a drainage standpipe in a pipe shaft of the building and allows the drainage water that has flowed down the horizontal branch pipe to flow down; Connecting the horizontal branch pipe and the vertical pipe <1> ~ <3> A drainage system comprising: a joint according to any one of the above. <5> <4> A building equipped with a drainage system as described above. [Effects of the Invention]

[0014] The joint according to the present invention can effectively block smoke and fire that occurs below the floor slab through which it is inserted. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a side view of a drainage system equipped with a joint according to an embodiment of the present invention. [Figure 2] 1 is a side cross-sectional view of a group joint (joint) according to an embodiment of the present invention. [Figure 3] FIG. 10 is another cross-sectional side view of the group joint of one embodiment to which the present invention is applied. [Figure 4] FIG. 10 is a cross-sectional side view of yet another embodiment of the group joint to which the present invention is applied. [Figure 5] FIG. 10 is a side cross-sectional view of a group joint according to another embodiment of the present invention. [Figure 6] FIG. 10 is another cross-sectional side view of a group joint according to another embodiment of the present invention. [Figure 7] FIG. 10 is a cross-sectional side view of yet another embodiment of a group joint to which the present invention is applied. [Figure 8] FIG. 10 is a side cross-sectional view of a group joint according to still another embodiment of the present invention. [Figure 9] FIG. 10 is another cross-sectional side view of a group joint according to yet another embodiment of the present invention. [Figure 10] FIG. 10 is a side cross-sectional view of a group joint according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of a joint to which the present invention is applied will be described with reference to the drawings. Note that the drawings used in the following description are schematic, and the ratios of length, width, thickness, etc. are not necessarily the same as those in the actual products and can be changed as appropriate.

[0017] As shown in Figures 1 and 2, a collective joint (joint) 1 according to one embodiment of the present invention is a joint configured to be able to be inserted into a floor slab S, and includes an upper member 12, a lower member 14, straightening vanes 16, and a thermal expansion material 30. Note that the straightening vanes 16 and the thermal expansion material 30 are not shown in Figure 1.

[0018] The upper member 12 is a pipe member that protrudes above the floor slab S when the manifold 1 is inserted into the floor slab S. The upper member 12 comprises a main pipe 2 that extends in the vertical direction, and a plurality of branch pipes 3 (three in this embodiment) connected to the outer circumferential surface of the main pipe 2. The axes of the three branch pipes 3A, 3B, and 3C are arranged on the same plane in the left-right direction (i.e., the horizontal direction), and are mutually perpendicular to the axis of the main pipe 2. In the following, the branch pipes 3A, 3B, and 3C will be referred to as branch pipes 3 unless there is a particular need to distinguish them, and this description will also be used for related components.

[0019] The lower member 14 is connected to the upper member 12, and more specifically, is a pipe member fitted onto the lower part of the upper member 12. When the collective joint 1 is inserted into the floor slab S, the upper part 14a of the lower member 14 is embedded inside the floor slab S, and the lower part 14b of the lower member 14 protrudes below the floor slab S.

[0020] As shown in Figure 1, the manifold 1 is used in the drainage system of a multi-story building (not shown), such as an apartment building. Specifically, the manifold 1 is configured to be connectable to a horizontal branch pipe 7 for flowing down the wastewater discharged from sanitary equipment on each floor, and a standpipe 9 that constitutes a drainage standpipe in the pipe shaft and flows the wastewater that has flowed down the horizontal branch pipe 7 to the lowest part of the drainage system.

[0021] The lower part of a standpipe 9 (for example, standpipe 9A) is fitted into the upper part of the upper member 12 of the collecting joint 1, and the upper part of another standpipe 9 (for example, standpipe 9B) is fitted into the lower part of the lower member 14. As shown in FIG. 2, a bushing 28 is fitted into the socket at the upper part of the main pipe 2. The bushing 28 is formed so that it can be fitted onto the outside of the standpipe 9A (not shown) in order to accommodate changes in the size and shape of the standpipe 9A. As shown in FIG. 1, the downstream end of a horizontal branch pipe 7 is fitted into each of the branch pipes 3 of the collecting joint 1.

[0022] The collective joint 1 is inserted into a through hole H formed in a concrete floor slab S located between adjacent floors in the vertical direction. Mortar M is filled between the side wall of the through hole H and the collective joint 1. Note that in Figure 2 and subsequent figures, the floor slab S and part of the mortar M are omitted.

[0023] The flow control vanes 16 are housed in a pipe in the upper part 14a of the lower member 14, and include a blade member 18 and an annular member 19 that supports the blade member 18. The blade member 18 is composed of a member formed in a spiral shape that extends from one radially inner end of the annular member 19, passes through the center, and descends toward the other radially inner end. An upper end 18a and a lower end 18b of the blade member 18 are connected to the annular member 19 via connecting portions 21.

[0024] The thermal expansion material 30 is provided on the outer peripheral surface (peripheral wall) of the lower member 14. The thermal expansion material 30 is not particularly limited as long as it is a material that can expand due to heat, and examples thereof include known thermal expansion sheets. When the collective joint 1 is inserted into the floor slab S, as shown in FIG. 2, the upper end 30a of the thermal expansion material 30 is positioned lower than the upper end surface Sa of the floor slab S. Note that "the upper end 30a of the thermal expansion material 30 is positioned lower than the upper end surface Sa of the floor slab S" means that the thermal expansion material 30 is inside the floor slab S, and the upper end 30a of the thermal expansion material 30 and the upper end surface Sa of the floor slab S may be at the same height. Meanwhile, the lower end 30b of the thermal expansion material 30 is positioned lower than the upper end 18a of the blade member 18. In other words, the lower end 30b of the thermal expansion material 30 is positioned lower than the upper end 18a of the blade member 18.

[0025] While satisfying the above conditions, it is preferable that the width of the thermal expansion material 30 in the height direction is 30 mm or more and 60 mm or less, as shown in Figure 3. It is also preferable that the lower end 30b of the thermal expansion material 30 is disposed between a height of 30 mm and a height of 100 mm below the upper end surface Sa of the floor slab S.

[0026] By satisfying the above conditions, for example, the height between the upper end surface Sa of the floor slab S and the lower end 30b of the thermal expansion material 30 is ensured to be about 100 mm. As a result, even when the manifold 1 is installed about 70 mm above the position shown in Fig. 3 (i.e., the relative position of the manifold 1 with respect to the floor slab S) depending on the height of drainage equipment such as the horizontal branch pipe 7 connected to the branch pipe 3, as shown in Fig. 4, the thermal expansion material 30 is positioned between the upper end surface Sa and the lower end surface Sb of the floor slab S in the height direction.

[0027] (Another aspect (1)) As another embodiment of the above-described embodiment, as shown in Figures 5 and 6, the mass joint 1 may be provided with a sound-insulating cover 40. The sound-insulating cover 40 is open at the socket of the mass joint 1. The thermal expansion material 30 may be provided on the outside of the lower member 14 of the mass joint 1 and inside the sound-insulating cover 40, as shown in Figure 5, or may be provided on the outside of the sound-insulating cover 40, as shown in Figure 6.

[0028] Furthermore, when the thermal expansion material 30 is provided inside the sound-insulating cover 40, it is preferable to provide a constraining layer 48 between the sound-insulating cover 40 and the lower member 14 of the joint assembly 1, as shown in Fig. 7. Examples of materials for the constraining layer 48 include aluminum, glass fiber nonwoven fabric, and glass fiber woven fabric. By providing the constraining layer 48 in this manner and arranging the adhesive surface (or non-constraining surface) 30c of the thermal expansion rod 30 on the sound-insulating cover 40 side, the degree of closure of the through hole H in the event of a fire can be increased.

[0029] (Other aspect (2)) When the thermal expansion material 30 is provided on the outside of the sound-insulating cover 40 as illustrated in FIG. 6, as another embodiment of the above-described embodiment, a mesh-like non-combustible member 44 such as a wire mesh may be provided on the outside of the thermal expansion material 30, i.e., at the position where mortar M is backfilled, as shown in FIG. 8. Alternatively, as shown in FIG. 9, the non-combustible member 44 may be provided on the outside of the sound-insulating cover 40, and the thermal expansion material 30 may be provided on the outside of the non-combustible member 44 so that the non-combustible member 44 protrudes in the height direction. With these configurations, the non-combustible member 44 and the mortar M become entangled, preventing the thermal expansion material 30 from falling. As described above, by wrapping the thermal expansion material 30 in contact with the outside of the sound-insulating cover 40 (i.e., the mortar M side), the degree of closure of the through hole H in the event of a fire can be increased.

[0030] (Other aspect (3)) The mass joint 1 may include a middle member 13 between the upper member 12 and the lower member 14. For example, the upper end of the middle member 13 is fitted inside the lower part of the upper member 12, and the lower end of the middle member 13 is fitted inside the upper part of the lower member 14. The middle member 13 is also embedded in the floor slab and mortar M. In such a configuration, the thermal expansion material 30 is provided on the outside of the lower part of the upper member 12.

[0031] Furthermore, the blade members 18 of the flow straightening vanes 16 do not need to be formed in a spiral shape as described above, and are not particularly limited as long as they can straighten the flow of the fluid flowing into the joint assembly 1, and may be formed so as to rise from the outer periphery inside the lower member 14 toward the center, as shown in Fig. 10. Furthermore, the flow straightening vanes 16 may be directly connected to the inner circumferential surface of the lower member 14 without including the annular member 19.

[0032] As explained above, according to the collective joint 1 of the above-mentioned embodiment, the straightening vanes 16 are disposed at a height where they are easily exposed to heat and inside the lower member 14 of the collective joint 1, so when exposed to heat they melt away quickly and the through holes H are smoothly closed by the thermal expansion material 30. This makes it possible to effectively block smoke and flames occurring below the floor slab S.

[0033] Furthermore, according to the collective joint 1 of the above-described embodiment, the width of the thermal expansion material 30 in the height direction is 30 mm or more and 60 mm or less, and the lower end 30b of the thermal expansion material 30 is disposed between a height of 30 mm below and a height of 100 mm below the upper end surface Sa of the floor slab S, so that the position of the thermal expansion material 30 can be optimized. For example, under the general condition that the thickness of the floor slab S is 100 mm or more, the relative position of the thermal expansion material 30 and the straightening vane 16 becomes appropriate, so that the fire resistance performance of the collective joint 1 can be reliably exhibited.

[0034] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as set forth in the claims. [Explanation of symbols]

[0035] 1...Collective joint (joint) 3...Branch pipe 12...Upper member 14...Lower member 16...Straightening blade 30...Thermal expansion material 30a…Top end 30b…lower end S...Floor slab Sa…Top end surface

Claims

1. A piping structure having a resin joint configured to be insertable into a floor slab and a standpipe connected to the joint, A resin upper member that includes a branch pipe and protrudes above the floor slab when the joint is inserted into the floor slab; a middle member connected to a lower end of the upper member; A resin lower member connected to the lower end of the central member, the upper part of which is located inside the floor slab and the lower part of which protrudes below the floor slab when the joint is inserted into the floor slab; A blade member is located inside the central member and inclined with respect to an axis of the central member; a thermal expansion material provided on the outer side of the upper member; Equipped with When the joint is inserted into the floor slab, The thermal expansion material is disposed at a position where it is embedded inside the floor slab, a lower end of the thermal expansion material is disposed at a position lower than an upper end of the blade member; A piping structure, wherein an upper end of the thermal expansion material is positioned below an upper end of the blade member.

2. A thermal expansion material used in a piping structure having a resin joint configured to be insertable into a floor slab and a standpipe connected to the joint, The piping structure includes a branch pipe and an upper member made of resin that protrudes above the floor slab when the joint is inserted into the floor slab; a middle member connected to a lower end of the upper member; A resin lower member connected to the lower end of the central member, the upper part of which is located inside the floor slab and the lower part of which protrudes below the floor slab when the joint is inserted into the floor slab; A blade member is located inside the central member and inclined with respect to an axis of the central member; The thermal expansion material is provided on the outer side of the upper member; Equipped with When the joint is inserted into the floor slab, The thermal expansion material is disposed at a position where it is embedded inside the floor slab, a lower end of the thermal expansion material is disposed at a position lower than an upper end of the blade member; The thermal expansion material has a width in the height direction of 30 mm or more and 60 mm or less.

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