JP7132035B2 - Piping structure and piping system - Google Patents

Description

The present invention relates to piping structures and piping systems.

Conventionally, as plumbing for water supply and drainage used in collective housing, etc., it is possible to connect to vertical pipes at collective joints that connect vertical pipes that penetrate each floor vertically and horizontal pipes that extend inside each floor. and a horizontal pipe connection protruding from the side surface of the vertical pipe connection to which the horizontal pipe can be connected, and covered with a sound insulating cover, for example, as shown in Patent Document 1 below. structure is known.
A sound insulating cover provided on such a collective joint is formed with a through hole into which the horizontal pipe joint is inserted, and is wound around the collective joint and attached. As the sound insulating cover, a two-layer structure having a sound absorbing material that covers the vertical pipe connection and a sound insulating material that covers the sound absorbing material is generally adopted to improve sound insulation.

JP 2016-142003 A

However, in the conventional piping structure as described above, the upper end portion of the assembly joint serves as a fixed position for the support bracket for supporting the frame of the building structure. Then, there is a problem that the fixed portion of the joint becomes a portion not covered with the sound insulation cover, and the drainage sound is generated from the portion not covered with the sound insulation cover.

On the other hand, for example, when covering up to the upper end of the collective joint with the sound insulation cover, the sound insulation cover is held from the outside by the support fitting. Since this sound insulating cover has a two-layer structure consisting of a sound absorbing material and a sound insulating material and has a large thickness, there is a problem that the support state becomes unstable when it is held by the support metal fittings.
Therefore, there is a need to achieve a good balance between suppressing the generation of drainage noise and stabilizing the support state by the support metal fittings, and there is room for improvement in this respect.

Therefore, the present invention has been made in view of the above problems, and provides a piping structure and a piping system capable of suppressing the generation of drainage noise and enhancing the stability of the state of support by support metal fittings. It is an object.

In order to achieve the above object, a piping structure according to the present invention includes a vertical pipe connection portion connectable to a vertical pipe, and a horizontal pipe connection portion projecting from a side surface of the vertical pipe connection portion and capable of connecting a horizontal pipe. , a sound absorbing material covering the vertical pipe connection, and a sound insulating cover having a sound insulating material covering the sound absorbing material, wherein the outer peripheral side surface of the vertical pipe connection has a region along the circumferential direction is provided with a projection on at least a part of, the sound absorbing material is arranged so as not to overlap the projection, and the sound insulating material is arranged so as to cover the projection.

Further, a piping system according to the present invention is characterized by comprising the above-described piping structure, and a support fitting that is fixed to a frame of a building structure and that sandwiches the protrusion via the sound insulating material. .

In the present invention, the entire outer peripheral side surface of the vertical pipe connecting portion is covered with the sound insulating material, and the sound absorbing material is also arranged at a position that does not overlap the projection. Therefore, for example, the sound generated by the drainage flowing through the collection joint can be weakened through the sound absorbing material and the sound can be insulated with the sound insulating material, so the sound insulation performance of the sound insulating cover can be effectively secured, and the sound of the drainage can be reduced. Leakage can be prevented.
Further, in the present invention, a protrusion is provided on at least a part of the region along the circumferential direction on the outer peripheral side surface of the vertical pipe connection portion, and the support fitting can be directly sandwiched between the protrusion via the sound insulating material. The assembly joint can be supported by the frame of the building structure. At this time, since the sound absorbing material is not superimposed on the protrusion, the support metal fitting is held between the protrusion only through the sound insulation material, so that the support metal fitting can be supported in a stable state. . In other words, there is no possibility that the vertical pipe connection portion and the support metal fitting will move or create a gap, or that the support metal fitting will not be tilted.

Further, the piping structure according to the present invention may be characterized in that the protrusion is arranged above the horizontal pipe connecting portion.

In this case, when the horizontal pipes are arranged on the floor slab of the building frame, the support fittings supported at the positions of the protrusions arranged above the horizontal pipe joints in the vertical pipe joints are placed on the upper surface of the floor slab. By connecting with , the collective joint can be supported in a stable posture with respect to the frame.

Further, the piping structure according to the present invention may be characterized in that the protrusion is arranged below the horizontal pipe connecting portion.

In this case, for example, when the ceiling pipe is arranged such that the horizontal pipe is arranged under the floor slab of the frame, it is supported at the position of the protrusion arranged below the horizontal pipe connection in the vertical pipe connection. By connecting the supporting metal fittings to the lower surface of the floor slab and supporting them by suspending them, it is possible to support the assembly joints in a stable posture with respect to the building frame.

Further, in the piping structure according to the present invention, it is preferable that the protrusion is provided over the entire circumference in the circumferential direction.

In this case, since the ring-shaped support metal fitting can hold the projecting portion over the entire circumference, it is possible to support in a more stable state.

Further, in the piping structure according to the present invention, it is preferable that the protrusion height from the outer peripheral side surface of the protrusion is equal to or greater than the thickness dimension of the sound absorbing material.

In this case, the sound absorbing material does not protrude radially outward from the protrusion. Therefore, the sound insulating material is not pushed outward by the sound absorbing material, and the stability of the supporting state of the support fitting supported at the position of the protrusion can be further enhanced.

ADVANTAGE OF THE INVENTION According to the piping structure and piping system of this invention, while it can suppress generation|occurrence|production of a drainage sound, the stability of the support state by a support metal fitting can be improved.

1 is a front view showing a schematic configuration of a collective joint in a piping structure according to an embodiment of the present invention, in which the left side of the paper surface from the center axis line is a view in which a sound insulation cover and a support metal fitting are provided, and the right side of the paper surface from the center axis line is before the sound insulation cover is provided. is a diagram. Fig. 4 is an enlarged vertical cross-sectional view enlarging the main part of the upper portion of the vertical pipe connecting portion; It is a perspective view of a vertical pipe connection part. FIG. 4 is a front view of the vertical pipe connecting portion shown in FIG. 3; FIG. 4 is a plan view of the vertical pipe connecting portion shown in FIG. 3 as viewed from above; (a) is a plan view of a sound absorbing sheet, and (b) is a plan view of a sound insulating sheet. FIG. 10 is a front view showing a schematic configuration of a collective joint in a piping structure according to a first modified example, in which the figure on the left side of the paper surface from the center axis line is the sound insulation cover and the support fitting, and the right side on the paper surface from the center axis line is the diagram before the sound insulation cover is provided. is. FIG. 11 is a front view showing the configuration of a vertical pipe connection portion of a collective joint according to a second modified example;

DESCRIPTION OF THE PREFERRED EMBODIMENTS A piping structure and a piping system according to embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the joint part 1 (pipe structure) according to the present embodiment is used, for example, for building drainage, and is arranged in a through hole 31 formed in a floor slab 3 (framework). The joint part 1 has a collective joint 10 .

The collective joint 10 includes an upper connection pipe 11 and a lower connection pipe 12 connected to the upper connection pipe 11 via an intermediate pipe 15 . The upper connection pipe 11 has a vertical pipe connection portion 13 connectable to the vertical pipe P1, and a horizontal pipe connection portion 14 projecting from the outer peripheral side surface 13a of the vertical pipe connection portion 13 and connectable to the horizontal pipe P2. is doing. A vertical pipe P<b>1 is connected to the upper end of the upper connecting pipe 11 .

Here, in the following description, the upper connecting pipe 11 side of the vertical pipe connecting portion 13 along the central axis O of the vertical pipe connecting portion 13 is referred to as the upper side, and the lower connecting pipe 12 side is referred to as the lower side. A direction orthogonal to the central axis O in plan view seen from the direction of the central axis O is called a radial direction, and a direction rotating around the central axis O in plan view seen from the axial direction is called a circumferential direction.

The vertical pipe connection portion 13 has a dam plate 13b (see FIG. 4) on its inner surface. The blocking plate 13b is installed at an angle of -30° to 20° from the vertical direction. If the installation angle is more than 20°, the swirling flow swirled by the inclined plate cannot be sufficiently dammed, and there is a possibility that a reverse flow to the horizontal pipe P2 may occur. Also, if the inclination is less than -30°, the amount of rebounding of the received water increases, which may disturb the flow and increase the pressure fluctuation in the pipe.

As shown in FIGS. 2 to 5, on the outer peripheral side surface 13a of the vertical pipe connection portion 13, projections 130 protrude radially outward at a plurality of locations (four locations) spaced apart at regular intervals in the circumferential direction. is provided. Specifically, four sets of protrusions 130 are arranged at intervals of 90 degrees in the circumferential direction. Each protrusion 130 is provided in a state in which three ribs 130A extending along the circumferential direction are arranged at equal intervals in the axial direction.

As shown in FIG. 2, the protruding height H from the outer peripheral side surface 13a of the rib 130A to the protruding end 130a is slightly larger than the thickness dimension D of the sound absorbing sheet 21, which will be described later. It has smaller dimensions than the portion 14 . As shown in FIGS. 3 to 5, each rib 130A of the protrusion 130 extends with the same length in the circumferential direction, and the extension dimension can be set arbitrarily. As will be described later, the protrusions 130 are portions where the support metal fittings 5 (see FIG. 1) are supported, so the respective protrusions 130 are set to have the same circumferential length. The protrusions 130 are arranged intermittently along the entire circumference.

When constructing the assembly joint 10 to the building structure, as shown in FIG. It is held by coming into contact with it in a sandwiched state from the outside of the direction via a sound insulating sheet 22 which will be described later.

The support fitting 5 is composed of an annular clamping ring 51 divided into two in the circumferential direction, a first fixing portion 52A whose one end is fixed to the clamping ring 51, and a second fixing portion 52B whose other end is fixed to the floor slab 3. and a support connecting member 52 having A pair of divided clamping rings 51 are clamped at a height position where the protrusion 130 of the vertical pipe connection portion 13 is arranged, and the support connecting member 52 is fixed between the clamping rings 51 and the upper surface 3a of the floor slab 3. By doing so, the collective joint 10 is fixed to the floor slab 3 .

The horizontal pipe connection portion 14 extends outward in a radial direction perpendicular to the central axis O from the peripheral wall of the vertical pipe connection portion 13, as shown in FIG. In the example of this embodiment, three horizontal pipe connecting portions 14 are arranged.
Two of the three horizontal pipe connecting portions 14 are separately arranged at positions sandwiching the central axis O in the radial direction. The remaining horizontal pipe connecting portions 14 extend in a radial direction perpendicular to the central axis O, in a direction forming an angle of 90° with the extending direction of each of the two horizontal pipe connecting portions 14 when viewed from above. In addition, the quantity and extending direction of the horizontal pipe connecting portions 14 are not limited to such an aspect, and can be arbitrarily changed. Horizontal pipes P<b>2 are separately connected to the outer ends of the horizontal pipe connecting portions 14 in the radial direction perpendicular to the central axis O. As shown in FIG.

For the upper connection pipe 11, for example, a polyvinyl chloride resin composition containing 0.1 to 1.0 parts by weight of non-expanding graphite with respect to 100 parts by weight of polyvinyl chloride resin is injected into the cavity. Obtained with filling.

An intermediate pipe 15 is connected to the lower end of the upper connection pipe 11 . The outer diameter of the intermediate pipe 15 is smaller than the outer diameter of the vertical pipe connecting portion 13 of the upper connecting pipe 11 . The peripheral wall of the intermediate pipe 15 is fitted inside the lower end portion of the vertical pipe connecting portion 13 .

The intermediate pipe 15 is made of polyvinyl chloride resin, and preferably contains a resin composition containing polyvinyl chloride resin and thermally expandable graphite. That is, the intermediate pipe 15 is produced by molding a resin composition. The intermediate tube 15 is typically made by extruding a resin composition.
Further, the intermediate pipe 15 may have a single-layer structure in which the entire intermediate pipe 15 is made of a resin composition, or may have a multi-layer structure in which a plurality of layers are formed. In the case of a multilayer structure, any layer may be formed from the resin composition. For example, when the intermediate pipe 15 has a three-layer structure consisting of a surface layer, an intermediate layer, and an inner layer, the intermediate layer may be formed from a resin composition, and the surface layer, intermediate layer, and inner layer may contain an endothermic agent. may contain.
When the intermediate pipe 15 does not contain thermally expandable graphite, a sheet-like refractory material containing thermally expandable graphite is wrapped around the outer surface of the intermediate pipe 15 or the outer surface of the sound insulating material covering the intermediate pipe 15 to provide a refractory material. The material may be embedded in the through portion 31 of the slab 3 .

As an example, a single layer structure made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite with respect to 100 parts by weight of polyvinyl chloride resin can be employed. Alternatively, a thermally expandable fireproof layer made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite with respect to 100 parts by weight of polyvinyl chloride resin, and covering the inner and outer surfaces of this thermally expandable fireproof layer A three-layer structure including a coating layer of a polyvinyl chloride resin composition that does not contain thermally expandable graphite can be employed.

When the intermediate tube 15 has a single-layer structure, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expandability may not be obtained during combustion, and desired fire resistance may not be obtained. If it exceeds 100 parts, it may thermally expand too much due to heating, and the residue may drop out of the through-hole 31 without being able to retain its shape, resulting in a decrease in fire resistance.

When the intermediate tube 15 has a multi-layer structure, the resin composition containing the thermally expandable fireproof material is not particularly limited, but 1 to 20 parts by weight of thermally expandable graphite is added to 100 parts by weight of the polyvinyl chloride resin. is preferably contained in a ratio of The content of thermally expandable graphite is more preferably 4 to 18 parts by weight, more preferably 6 to 16 parts by weight.
In the present embodiment, as will be described later, the stepped portion 32 is formed on the inner peripheral surface of the through hole 31. Therefore, even if the content of the thermally expandable graphite is relatively large and the residue is fragile, the residue is caught on the mounting surface 32a of the stepped portion 32, and the residue after the thermal expansion is held in the slab 3, making it difficult to fall off.

When the intermediate layer contains thermally expandable graphite, the intermediate layer exhibits a black color. Therefore, it is preferable that the surface layer and the inner layer contain a coloring agent other than black so as to be distinguishable from the intermediate layer.
The thicknesses of the surface layer and the inner layer are preferably 0.3 mm or more and 3.0 mm or less, and preferably 0.6 mm or more and 1.5 mm or less. If the thickness of the coating layer is 0.3 mm or more, sufficient mechanical strength as a pipe can be ensured, and if it is 3.0 mm or less, deterioration of fire resistance can be suppressed.
Also, the intermediate pipe 15 preferably satisfies the performance described in JIS K6741.
That is, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expandability may not be obtained during combustion, and desired fire resistance may not be obtained. If the thermally expandable graphite exceeds 20 parts by weight, it may thermally expand excessively due to heating, failing to retain its shape, and the residue may fall out of the through-holes 31, resulting in a decrease in fire resistance.

The thermally expandable graphite used in the present embodiment is, for example, powder such as natural flake graphite, pyrolytic graphite, Kish graphite, etc. After acid treatment of inserting an inorganic acid between graphite layers with an inorganic acid and a strong oxidizing agent, , a crystalline compound obtained by pH adjustment can be used.
Concentrated sulfuric acid, nitric acid, selenic acid and the like can be used as the inorganic acid. Concentrated nitric acid, perchloric acid, perchlorates, permanganates, bichromates, hydrogen peroxide and the like can be used as strong oxidizing agents.

Thermally expandable graphite, which is a crystalline compound that maintains the layered structure of carbon by the pH adjustment and is adjusted to pH 1.5 to 4.0, and a 1.3 times expansion temperature of 180 ° C. to 280 ° C. of thermally expandable graphite can be used.

When the pH of the thermally expandable graphite is less than 1.5, the acidity is too strong, and corrosion of molding equipment is likely to occur. , there is a risk that sufficient fire resistance cannot be obtained.
Although the particle size of the thermally expandable graphite is not particularly limited, for example, those in the range of 100 to 400 μm, preferably 120 to 350 μm can be used.

The resin composition constituting the intermediate pipe 15 may contain stabilizers, inorganic fillers, flame retardants, lubricants, processing aids, impact modifiers, and heat-resistant improvers as necessary within a range that does not hinder the purpose of the present embodiment. Additives such as agents, antioxidants, light stabilizers, UV absorbers, pigments, plasticizers, and thermoplastic elastomers may be added.

The lower connection pipe 12 has a tubular shape with a smaller diameter at the bottom than at the top. The lower connecting pipe 12 is located at the upper end and is a connecting pipe portion 16 connected to the lower portion of the intermediate pipe 15, and an inclined pipe connected to the lower portion of the connecting pipe portion 16 and having a diameter gradually decreasing downward. and a lower pipe portion 18 connected to the lower end portion of the inclined pipe portion 17 and to which the vertical pipe P1 is connected. The connection pipe portion 16, the inclined pipe portion 17, and the lower pipe portion 18 are integrally formed by, for example, injection molding of a synthetic resin material.

The inner diameter of the connecting pipe portion 16 is larger than the outer diameter of the intermediate pipe 15 . A peripheral wall of the intermediate pipe 15 is fitted inside the connecting pipe portion 16 . The outer diameter of the upper end portion of the inclined pipe portion 17 is smaller than the outer diameter of the connecting pipe portion 16 . The outer diameter of the lower end portion of the inclined tube portion 17 is smaller than the outer diameter of the upper end portion of the inclined tube portion 17 . The size of the inclined pipe portion 17 in the direction of the central axis O is larger than the size of the connecting pipe portion 16 in the direction of the central axis O. As shown in FIG.

The outer diameter of the lower pipe portion 18 is smaller than the outer diameter of the connection pipe portion 16 and larger than the outer diameter of the lower end portion of the inclined pipe portion 17 . The size of the lower pipe portion 18 in the direction of the central axis O is smaller than the size of the connecting pipe portion 16 in the direction of the central axis O. As shown in FIG. The vertical pipe P1 is connected to the lower connecting pipe 12 by fitting the vertical pipe P1 inside the lower pipe portion 18 from below.
In addition, the upper connection pipe 11 and the lower connection pipe 12 may be made transparent. Thereby, the connection state of the upper connecting pipe 11, the intermediate pipe 15 and the lower connecting pipe 12 can be visually recognized from the outside. Further, the upper connecting pipe 11 and the lower connecting pipe 12 may be blended with a flame retardant such as non-thermally expandable graphite or magnesium hydroxide.

As shown in FIG. 2, the sound insulating cover 20 includes a sound absorbing sheet 21 (sound absorbing material, first member) wound around the outer peripheral side surface 13a of the vertical pipe connection portion 13 from the radially outer side to cover the vertical pipe connection portion 13; and a sound insulating sheet 22 (sound insulating material, second member) covering the sound absorbing sheet 21 . Each of the sound absorbing sheet 21 and the sound insulating sheet 22 has flexibility.

As shown in FIG. 6( a ), the sound absorbing sheet 21 has a rectangular belt shape that is longer in the horizontal direction (long side direction) than in the vertical direction in a front view before being wrapped around the vertical pipe connection portion 13 . The sound absorbing sheet 21 is wound around the vertical pipe connection portion 13 so that the vertical direction coincides with the central axis O direction of the assembly joint 10 .

The sound absorbing sheet 21 is formed with a first fitting opening 24 into which the horizontal pipe connecting portion 14 is fitted. Three first fitting openings 24 are arranged at intervals in the lateral direction. The first fitting opening 24 has an elliptical shape when viewed from the front, with the major axis direction aligned with the vertical direction and the minor axis direction aligned with the lateral direction. The first fitting opening 24 is widened in the horizontal direction and has a perfect circular shape by being inserted into the horizontal pipe connecting portion 14 .

The sound absorbing sheet 21 is formed with a rectangular opening 21A in which the protrusion 130 (rib 130A) of the vertical pipe connecting portion 13 is arranged. A plurality of (four) openings 21A are arranged at intervals in the horizontal direction. In the illustrated example, the openings 21A located on both the left and right sides are divided in half, and when wound in the circumferential direction, the left and right openings 21A are paired to form one opening 21A. be done. The opening 21A has a horizontally long shape in a front view in accordance with the shape of the projection 130 at one location. The openings 21</b>A are separately arranged in portions of the sound absorbing sheet 21 located above the first fitting openings 24 .

The sound absorbing sheet 21 is formed in a sheet shape from a fiber material. As a material for the sound absorbing sheet 21, for example, felt, glass wool, rock wool, or the like can be used. As shown in FIG. 2, the sound absorbing sheet 21 has a thickness D of 1 to 20 mm and a surface density of 0.1 to 2 kg/m ² .
The material of the sound absorbing sheet 21 does not have to be a fiber material, and a porous material such as urethane foam, polyethylene foam, or polypropylene foam may be used as long as the thickness and surface density are within the ranges described above.

As shown in FIG. 6(b), the sound insulation sheet 22 has a rectangular belt shape that is longer in the horizontal direction (long side direction) than in the vertical direction in a front view before being wound around the vertical pipe connection portion 13. As shown in FIG. The sound insulation sheet 22 is wound around the vertical pipe connection portion 13 so that the vertical direction coincides with the central axis O direction of the assembly joint 10 .
The sound insulating sheet 22 is formed with a second fitting opening 25 into which the horizontal pipe connecting portion 14 is fitted. Three second fitting openings 25 are arranged at intervals in the lateral direction. The second fitting opening 25 has a vertically long elliptical shape when viewed from the front, with the long axis direction aligned with the vertical direction and the short axis direction aligned with the horizontal direction. The second fitting opening 25 is widened in the horizontal direction and has a perfect circular shape by being inserted into the horizontal pipe connecting portion 14 .

When the sound insulating sheet 22 is wound around the outer peripheral side of the sound absorbing sheet 21, the horizontal pipe connecting portion 14 is inserted and fitted into the second fitting opening 25 while elastically deforming the sound insulating sheet 22 so that the second fitting opening 25 expands. combined. Therefore, due to the elastic restoring force of the sound insulating sheet 22 , the inner peripheral edge of the second fitting opening 25 is in close contact with the outer peripheral surface of the horizontal pipe connecting portion 14 .

Both ends of the sound insulating sheet 22 in the horizontal direction are connected to each other at a portion of the outer peripheral side surface 13a of the vertical pipe connection portion 13 where the horizontal pipe connection portion 14 is not provided.
For example, both ends of the sound insulating sheet 22 in the horizontal direction are overlapped with each other in the radial direction and fixed by the adhesive tape 40 . As the adhesive tape 40, for example, a butyl rubber tape or the like having adhesiveness and water resistance can be used.
The ends of the sound insulation sheet 22 may be connected to each other with an adhesive instead of the adhesive tape 40 . Alternatively, they may be detachably connected by fasteners, hook-and-loop fasteners, or the like provided at both ends.

The sound insulation sheet 22 is made of a resin composition containing 300 to 3000 parts by weight of an inorganic filler with respect to 100 parts by weight of the base resin. An olefin-based resin can be used as the base resin. The sound insulation sheet 22 has a thickness of 1-5 mm and a surface density of 1-8 kg/m ² .
The base resin of the sound insulating sheet 22 is not limited to the olefin resin, and may be an elastic material such as modified asphalt, elastomer, rubber, polyolefin resin, soft vinyl chloride resin, or the like.

Examples of inorganic fillers include silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, bases magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite , imogolite, sericite, glass fiber, glass beads, silica-based balloon, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloon, charcoal powder, various metal powders, potassium titanate, magnesium sulfate, Lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dewatered sludge, etc. Calcium and barium sulfate are preferably used. In addition, these may be used alone or in combination of two or more.

The sound insulation sheet 22 has flexibility. The tensile modulus of the sound insulating sheet 22 is preferably 5-500 kg/cm ² . This is because it is easy to wind around the assembly joint 10 . About 100 kg/cm ² is neither too soft nor too hard and easy to wind.
A surface material such as synthetic fiber nonwoven fabric or glass fiber nonwoven fabric may be laminated on one or both sides of the sound insulation sheet 22 .

The lower part of the assembly joint 10 is inserted through a through hole 31 formed in the floor slab 3 of the building structure, as shown in FIG.
A stepped portion 32 projecting radially inward is formed in a lower portion of the inner peripheral surface of the through hole 31 . The stepped portion 32 is formed in a cylindrical shape and arranged coaxially with the through hole 31 . The stepped portion 32 is formed with a mounting surface 32a facing upward.

A lower end portion of the sound insulating cover 20 is arranged between the upper surface 3 a and the lower surface 3 b of the floor slab 3 . A lower end portion of the sound insulation cover 20 is mounted on a mounting surface 32 a of the stepped portion 32 in the through hole 31 .
The inner diameter of the through hole 31 is larger than the outer diameter of the sound insulation cover 20 . The inner diameter of the stepped portion 32 of the through-hole 31 is larger than the outer diameter of the connection pipe portion 16 of the lower connection pipe 12 of the assembly joint 10 that faces in the radial direction.

At least a portion of the assembly joint 10 embedded in the floor slab 3 is a thermal expansion tube. In the illustrated example, the connecting pipe portion 16 of the lower connecting pipe 12 is a thermal expansion pipe.
The thermal expansion tube is heated by, for example, a fire occurring below the floor slab 3, and expands and expands in diameter. As a result, the outer peripheral surface of the connecting pipe portion 16 contacts the inner peripheral surface of the stepped portion 32 in the through hole 31 of the floor slab 3 . In this way, the flames and heat generated by the fire are cut off without being transmitted to the floor above the floor slab 3.

Here, transmission of vibration from the piping structure to the floor slab 3 will be described.
When the wastewater flows down into the collection joint 10, the wastewater collides with the inner surface of the collection joint 10, causing the collection joint 10 to vibrate. This vibration may be transmitted from the outer peripheral surface of the collective joint 10 to the floor slab 3 via the inner peripheral surface of the through hole 31 .

Generally, the vibration transmitted from the through-holes 31 of the floor slab 3 to the inner peripheral surface is significantly transmitted to the upper surface 3 a and the lower surface 3 b of the floor slab 3 . This is because the vibration energy is biased toward the surface, resulting in less attenuation and greater amplitude.
Therefore, in the joint portion 1 of the present embodiment, by arranging the lower end portion of the sound insulating cover 20 on the stepped portion 32, the outer peripheral surface of the collective joint 10 and the opening peripheral portion of the through hole 31 in the upper surface 3a of the floor slab 3 and a sound insulation cover 20 is interposed between them.

As described above, in this embodiment, the assembly joint 10 is inserted into the through hole 31 formed in the floor slab 3 , and the lower part of the assembly joint 10 is embedded in the floor slab 3 . A lower end portion of the sound insulating cover 20 covering the collective joint 10 is arranged between the upper surface 3 a and the lower surface 3 b of the floor slab 3 . Therefore, the sound insulation cover 20 can be interposed between the outer peripheral surface of the joint assembly 10 and the peripheral edge of the opening of the through hole 31 of the joint assembly 10 on the upper surface 3 a of the floor slab 3 . As a result, transmission of vibration from the collective joint 10 to the upper surface 3a of the floor slab 3 to which the vibration from the collective joint 10 is remarkably transmitted is blocked by the sound absorbing sheet 21 and the sound insulating sheet 22 of the sound insulation cover 20. - 特許庁becomes possible. In this way, it is possible to reliably suppress the generation of abnormal noise through the floor slab 3 of the building structure to be constructed.

In addition, since the portion of the assembly joint 10 embedded in the floor slab 3 is a thermal expansion tube, if the temperature rises due to a fire or the like below the floor slab 3, the thermal expansion tube will not expand. Thus, it is possible to prevent heat from being transferred to the upper floor of the floor slab 3 from the lower floor.

As shown in FIGS. 1 and 2, the assembly joint 10 is provided with a vertical bush 41 via a vertical packing (not shown) at the upper end of the upper connection pipe 11 to which the vertical pipe P1 is connected. A cap portion 42 is provided at the upper end portion of 41 .
As shown in FIG. 2, the vertical bushing 41 includes a fitting portion 41a and a swirl vane (not shown) attached via a support leg extending downward from the fitting portion 41a. The fitting portion 41 a has a cylindrical shape that is smaller in diameter than the upper end portion of the vertical bush 41 and fits into the vertical pipe connection portion 13 of the upper connection pipe 11 .

The vertical packing is made of a rubber material such as ethylene-propylene-diene rubber (EPDM) that is commonly used in drainage equipment, and the upper end of the packing is in watertight contact with the outer peripheral surface of the vertical pipe P1. The upper end surface of the vertical packing is fitted inside the vertical bushing 41 so as to substantially match the upper end surface of the vertical bushing 41 .

The cap portion 42 is a ring-shaped member that is fitted onto the upper end portion of the vertical bush 41 and has an insertion hole 42a formed therein through which the vertical pipe P1 can be inserted. The cap portion 42 has a top end ring 43 and a flange portion 44 extending downward from the outer peripheral edge of the top end ring 43 . The cap portion 42 prevents the vertical packing from coming off from the vertical bush 41 . After the vertical bushing 41, the vertical packing, and the cap portion 42 are pre-assembled and integrated, the fitting portion 41a of the vertical bushing 41 can be fitted and adhered to the vertical pipe connection portion 13 of the upper connection pipe 11. .
The vertical bushing 41 and the cap portion 42 are both made of a polyvinyl chloride resin composition containing 0.1 to 1.0 parts by weight of non-expanding graphite with respect to 100 parts by weight of the polyvinyl chloride resin. It is obtained by injection molding an object.

Next, a method for constructing the joint portion 1 described above will be described with reference to the drawings.
First, as shown in FIG. 1, the collective joint 10 of the joint section 1 is used in the confluence of the horizontal branch pipes on each floor of the drainage vertical pipe of a multi-story building, and is constructed as follows.
That is, the portion including the fitting connection portion of the intermediate pipe 15 and the upper connection pipe 11 is installed in a state of facing the through hole 31 of the floor slab 3, and the vertical pipe P1 (for example, a commercially available product) of the lower floor is installed. Eslon (registered trademark) fireproof VP pipe manufactured by Sekisui Chemical Co., Ltd. can be used) is fitted to the lower pipe portion 18 of the lower connecting pipe 12 and adhered. Also, the lower end of the vertical pipe P1 of the upper floor is fitted to a vertical packing (not shown) through the vertical bushing 41 and the cap portion 42 .
Next, the through hole 31 of the floor slab 3 is filled with mortar, and the portion including the fitting connection between the intermediate pipe 15 and the upper connecting pipe 11 is embedded in the mortar.

Here, before construction, the sound insulating cover 20 is attached to the vertical pipe connection portion 13 in advance. Specifically, first, as shown in FIG. At this time, the horizontal pipe connecting portion 14 is inserted into each first fitting opening 24 (see FIG. 6A) of the sound absorbing sheet 21, and the protrusion 130 of the vertical pipe connecting portion 13 is arranged in the opening 21A. Attach to The ends of the wound sound absorbing sheet 21 are connected to each other using, for example, an adhesive tape or an adhesive. In this state, the projecting height H of the projecting portion 130 is set to be larger than the thickness D of the sound absorbing sheet 21, so that the projecting end 130a of the projecting portion 130 projects radially outward from the sound absorbing sheet 21. there is After that, the sound insulation sheet 22 is wound so as to cover the sound absorption sheet 21.例文帳に追加At this time, the horizontal pipe connecting portions 14 are inserted into the second fitting openings 25 (see FIG. 6B) of the sound insulating sheet 22 and attached. The ends of the wound sound insulation sheet 22 are connected to each other using, for example, an adhesive tape or an adhesive.

Subsequently, the end of the horizontal pipe P2 is inserted into the horizontal pipe connecting portion 14 to connect the horizontal pipe P2.
Next, as shown in FIG. 1, a pair of split clamping rings 51 are clamped at a height where the protrusion 130 of the vertical pipe connection portion 13 is arranged, and the support connecting member 52 is connected to the clamping rings 51 and the floor. The collective joint 10 is fixed to the floor slab 3 by being fixed to the upper surface 3 a of the slab 3 . In addition, since the projection 130 is covered with the sound insulation sheet 22 and cannot be seen when the support metal fitting 5 is attached, a mark is made on the sound insulation sheet 22 in advance so that the position of the projection 130 can be known. You can
The joint part 1 using the assembly joint 10 is constructed by such a construction procedure.

Next, the operation of the piping structure and piping system configured as described above will be described in detail with reference to the drawings.
In the present embodiment, as shown in FIG. 1, the entire outer peripheral side surface 13a of the vertical pipe connection portion 13 is covered with a sound insulating sheet 22, and a sound absorbing sheet 21 is also arranged at a position not overlapping the protrusion 130. . Therefore, for example, the sound generated by the drainage flowing through the joint 10 can be weakened through the sound absorbing sheet 21 and insulated by the sound insulating sheet 22, so that the sound insulating performance of the sound insulating cover 20 can be effectively secured. , can prevent leakage of drainage sound.

Further, in the present embodiment, a protrusion 130 is provided in at least a part of the region along the circumferential direction on the outer peripheral side surface 13a of the vertical pipe connection portion 13, and the protrusion 130 is directly connected to the protrusion 130 via the sound insulation sheet 22. The support metal fittings 5 can be sandwiched, and the assembly joint 10 can be supported on the floor slab 3 of the building structure. At this time, since the sound absorbing sheet 21 is not overlapped with the projecting portion 130, the supporting metal fitting 5 is clamped against the projecting portion 130 only through the sound insulating sheet 22, so that the supporting metal fitting 5 is kept in a stable state. can be supported by In other words, there is no possibility that the vertical pipe connecting portion 13 and the support metal fitting 5 move or create a gap, or that the support metal fitting 5 tilts, thereby preventing the support state from becoming unstable.

Further, in the joint portion 1 according to the present embodiment, the projecting portion 130 is arranged above the horizontal pipe connection portion 14, so that when the horizontal pipe P2 is arranged on the floor slab 3, the vertical pipe connection portion The assembly joint 10 is stabilized with respect to the floor slab 3 by connecting the support fitting 5 supported at the position of the protrusion 130 arranged above the horizontal pipe connection portion 13 at 13 to the upper surface 3a of the floor slab 3. Posture can be supported.

Furthermore, in the present embodiment, as shown in FIG. 2, the projection height H of the protrusion 130 from the outer peripheral side surface 13a is larger than the thickness dimension of the sound absorbing sheet 21, so that the sound absorbing sheet 21 is It will be in a state where it does not protrude radially outward beyond the protrusion 130 . Therefore, the sound insulation sheet 22 is not pushed outward by the sound absorption sheet 21, and the stability of the supporting state of the support fitting 5 supported at the position of the protrusion 130 can be further enhanced.

As described above, in the joint portion 1 according to the present embodiment, it is possible to suppress the generation of drainage noise and improve the stability of the state of support by the support metal fittings 5 .

Next, a piping structure and a piping system according to a modified example of the embodiment described above will be described. Components having the same functions as those of the components of the above-described first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted to avoid duplication of description.

(First modification)
A joint portion 1A (piping structure) according to a first modification shown in FIG. The specific configuration of the protrusions 130 is the same as in the above-described embodiment, so a detailed description thereof will be omitted. 130A. The sound insulating cover 20 includes a sound absorbing sheet 21 and a sound insulating sheet 22 as in the embodiment described above. In this case, the sound absorbing sheet 21 is arranged such that the position of the opening 21A (see FIG. 6(a)) is aligned with the position of the protrusion 130 positioned below the horizontal pipe connecting portion 14. As shown in FIG.
In the first modified example, the protrusion 130 is arranged only below the horizontal pipe connection portion 14, but it may be arranged above the horizontal pipe connection portion 14 as in the above-described embodiment. good.

In this case, when the ceiling pipe is such that the horizontal pipe P2 is arranged on the lower surface 3b of the floor slab 3, the position of the protrusion 130 arranged below the horizontal pipe connection portion 14 in the vertical pipe connection portion 13 By connecting the support fitting 5 supported via the sound insulation sheet 22 of the sound insulation cover 20 to the lower surface 3b of the floor slab 3 and supporting it in a suspended manner, the assembly joint 10 is stabilized with respect to the floor slab 3. Posture can be supported.

(Second modification)
Next, in a second modification shown in FIG. 8, the protrusion 131 of the vertical pipe connection portion 13 is provided above the horizontal pipe connection portion 14 over the entire circumference in the circumferential direction. The projecting portion 131 is configured by arranging three annular ribs 131A continuously extending over the entire circumference in the vertical direction. Since the sound absorbing sheet of the sound insulating cover (not shown) in this case cannot form an opening for arranging the protrusion 131, a sheet separated vertically with the protrusion 131 sandwiched therebetween is adopted.

In the case of the second modification, the ring-shaped support fitting 5 (see FIG. 1) can be supported in a state in which the protrusion 131 is sandwiched over the entire circumference, so that it can be supported in a more stable state. Become.

Although the embodiments of the piping structure and piping system according to the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate without departing from the scope of the invention.
For example, in the above-described embodiment, the protrusion height H of the protrusion 130 is slightly larger than the thickness dimension D of the sound absorbing sheet 21, equal to or greater than the thickness of the sound absorbing material, and protrudes radially outward. It is preferable that the dimensions are equal to or greater than that, but the dimensions are not limited to such dimensions. For example, the protrusion height H from the outer peripheral side surface of the protrusion may be equal to the thickness dimension of the sound absorbing sheet. Alternatively, the protrusion height H of the protrusion may be smaller than the thickness of the sound absorbing material.

Moreover, although the protrusions 130 are installed at four locations on the outer periphery, the number of the protrusions is not limited to this. In short, any area in the circumferential direction may be used, and the number may be 2, 3, or 5 or more. Alternatively, it may be arranged over the entire circumference as in the second modified example described above.
In addition, in the present embodiment, each projection 130 has a configuration in which three ribs 130A are vertically arranged as the shape of the projections 130, but the present invention is not limited to this, and other configurations may be used. It doesn't matter if there is.

For example, in each of the above-described embodiments, the sound insulation cover 20 has a rectangular belt shape that is longer in the horizontal direction than in the vertical direction when viewed from the front, but the configuration is not limited to this. The front view shape of the sound insulation cover 20 can be arbitrarily changed.

Further, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the scope of the present invention.

1 joint part (piping structure)
3 Floor slab (framework)
3a upper surface 3b lower surface 5 support fitting 10 assembly joint 11 upper connection pipe 12 lower connection pipe 13 vertical pipe connection part 14 horizontal pipe connection part 20 sound insulation cover 21 sound absorbing sheet (sound absorbing material)
22 Sound insulation sheet (sound insulation material)
51 Clamping ring 52 Support connecting member 130, 131 Projection 130A Rib 131A Annular rib 130a Protruding end P1 Vertical tube P2 Horizontal tube H Projection height of rib (projection) D Thickness dimension of sound absorbing sheet O Central axis

Claims (6)

a collective joint having a vertical pipe connection portion connectable to a vertical pipe, and a horizontal pipe connection portion projecting from a side surface of the vertical pipe connection portion and capable of connecting a horizontal pipe;
A sound-insulating cover having a sound-absorbing material covering the vertical pipe connection and a sound-insulating material covering the sound-absorbing material,
A protrusion is provided in at least a part of a region along the circumferential direction on the outer peripheral side surface of the vertical pipe connection portion,
The sound absorbing material is arranged so as not to overlap the projection,
The piping structure, wherein the sound insulating material is arranged so as to cover the protrusion. 2. The piping structure according to claim 1, wherein said projecting portion is arranged above said horizontal pipe connecting portion. 3. The piping structure according to claim 1, wherein the projecting portion is arranged below the horizontal pipe connecting portion. 4. The piping structure according to any one of claims 1 to 3, wherein the projecting portion is provided over the entire circumference in the circumferential direction. 5. The piping structure according to any one of claims 1 to 4, wherein a height of protrusion of the protrusion from the outer peripheral side surface is equal to or greater than a thickness dimension of the sound absorbing material. The piping structure according to any one of claims 1 to 5;
and a support fitting that is fixed to a skeleton of a building structure and sandwiches the projecting portion via the sound insulating material.

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