JP7401964B2

JP7401964B2 - Piping structure

Info

Publication number: JP7401964B2
Application number: JP2018071789A
Authority: JP
Inventors: 斉太渕上; 英治木村; 総齋藤; 武司徳丸
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2018-04-03
Filing date: 2018-04-03
Publication date: 2023-12-20
Anticipated expiration: 2038-04-03
Also published as: JP2023153960A; JP2024094425A; JP7642906B2; JP7485840B2; JP2019183423A

Description

本発明は、配管構造に関する。 The present invention relates to piping structures.

従来、例えば下記特許文献１および特許文献２に示すような配管構造が知られている。これらの配管構造では、遮音カバーが集合継手を覆っている。集合継手は、縦管に接続可能な縦管接続部と、縦管接続部の側面から突設されて横管を接続可能な横管接続部と、を有している。
特許文献１に記載の遮音カバーは、集合継手の形状に合わせた３次元形状を呈する。この遮音カバーは弾性を備え、変形されながら集合継手に取付けられる。
特許文献２に記載の遮音カバーは平面形状を呈する。この遮音カバーには横管接続部が挿入される貫通孔が形成され、集合継手に巻き付けられて取付けられる。 Conventionally, piping structures as shown in Patent Document 1 and Patent Document 2 below are known, for example. In these piping structures, a sound insulating cover covers the collective joint. The collective joint has a vertical pipe connecting part that can be connected to the vertical pipe, and a horizontal pipe connecting part that protrudes from the side surface of the vertical pipe connecting part and can connect the horizontal pipe.
The sound insulation cover described in Patent Document 1 has a three-dimensional shape that matches the shape of the collective joint. This sound insulating cover has elasticity and is attached to the collective joint while being deformed.
The sound insulation cover described in Patent Document 2 has a planar shape. This sound insulating cover is formed with a through hole into which the horizontal pipe connection part is inserted, and is wrapped around and attached to the collective joint.

特開２０１６－０５０４４４号公報Japanese Patent Application Publication No. 2016-050444 特開２０１０－２３６６８８号公報JP2010-236688A

前記従来の配管構造では、例えば集合継手のうち、遮音カバーが取付けられていない部分を建築構造物の床スラブに埋設して施工することがあった。このような場合には、集合継手の内部を流下する排水が集合継手に衝突することで振動が生じ、この振動が床スラブに伝わることで異音が生じるおそれがあった。 In the conventional piping structure, for example, the part of the collective joint to which the sound insulation cover is not attached may be buried in the floor slab of the building structure. In such a case, the wastewater flowing down inside the collective joint collides with the collective joint, causing vibrations, which may be transmitted to the floor slab, causing abnormal noise.

本発明は、前述した事情に鑑みてなされたものであって、施工される建築構造物の床スラブを介して異音が生じるのを確実に抑制することができる配管構造を提供することを目的とする。 The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a piping structure that can reliably suppress abnormal noise from occurring through the floor slab of a building structure being constructed. shall be.

前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係る配管構造は、縦管に接続可能な縦管接続部と、前記縦管接続部の側面に突設されて横管を接続可能な横管接続部と、を有する集合継手と、前記縦管接続部を覆う吸音層と、前記吸音層を覆う遮音層と、を有する遮音カバーと、を備えた配管構造であって、前記集合継手の下部は、建築構造物の床スラブ内に埋設され、前記遮音カバーの下端部は、前記床スラブの上面と下面との間に配置されていることを特徴とする。 In order to solve the above problems, the present invention proposes the following means.
The piping structure according to the present invention includes a collective joint having a vertical pipe connecting part connectable to a vertical pipe, and a horizontal pipe connecting part protruding from a side surface of the vertical pipe connecting part to which a horizontal pipe can be connected; A piping structure comprising: a sound-insulating cover having a sound-absorbing layer covering the vertical pipe connection portion and a sound-insulating layer covering the sound-absorbing layer, wherein the lower part of the collective joint is located within a floor slab of a building structure. The sound insulating cover is buried, and a lower end portion of the sound insulating cover is disposed between an upper surface and a lower surface of the floor slab.

この発明によれば、集合継手が床スラブに形成された貫通孔内に挿入され、集合継手の下部が、床スラブ内に埋設されている。そして、集合継手を覆う遮音カバーの下端部が、床スラブの上面と下面との間に配置されている。このため、集合継手の外周面と、床スラブの上面における貫通孔の開口周縁部と、の間に遮音カバーを介在させることができる。 According to this invention, the collective joint is inserted into the through hole formed in the floor slab, and the lower part of the collective joint is buried in the floor slab. A lower end portion of the sound insulating cover covering the collective joint is disposed between the upper surface and the lower surface of the floor slab. Therefore, the sound insulating cover can be interposed between the outer peripheral surface of the collective joint and the opening peripheral portion of the through hole on the upper surface of the floor slab.

これにより、床スラブのうち、集合継手からの振動が顕著に伝わりやすい上面に、集合継手からの振動が伝わるのを、遮音カバーの吸音層および遮音層により遮断することが可能になる。このようにして、施工される建築構造物の床スラブを介して異音が生じるのを確実に抑制することができる。 This makes it possible to block vibrations from the collective joint from being transmitted to the upper surface of the floor slab, to which vibrations from the collective joint are particularly likely to be transmitted, by the sound absorbing layer and the sound insulating layer of the sound insulating cover. In this way, it is possible to reliably suppress abnormal noise from occurring through the floor slab of the building structure being constructed.

また、前記遮音カバーの下端部には、全周にわたって発泡テープが貼付されてもよい。
この場合には、遮音カバーの下端部に全周にわたって発泡テープが貼付されているので、遮音カバーの下端縁から外部に音が漏れ出るのを発泡テープが吸収することができる。 Further, a foamed tape may be attached to the lower end of the sound insulation cover over the entire circumference.
In this case, since the foam tape is attached to the entire circumference of the lower end of the sound insulation cover, the foam tape can absorb sound leaking to the outside from the lower edge of the sound insulation cover.

また、前記集合継手のうち、少なくとも前記床スラブ内に埋設された部分は、熱膨張管とされてもよい。 Furthermore, at least a portion of the collective joint buried within the floor slab may be a thermal expansion tube.

この場合には、集合継手のうち、床スラブ内に埋設された部分が熱膨張管であるため、仮に床スラブの階下で火災等による温度上昇があった場合に、熱膨張管が膨張することで、床スラブの上層階に階下からの熱が伝わるのを防ぐことができる。 In this case, the part of the collective joint that is buried in the floor slab is a thermal expansion tube, so if there is a temperature rise due to a fire etc. in the downstairs of the floor slab, the thermal expansion tube will expand. This prevents heat from being transmitted from downstairs to the upper floor of the floor slab.

またこの際、遮音カバーの下端部が、床スラブの上面と下面との間に配置されているので、仮に遮音カバーが、床スラブの貫通孔周りに形成された段部に配置されている場合には、遮音カバーが床スラブの段部と上下方向に係合していることとなる。このため、遮音カバーが床スラブの段部に引っかかることで、温度上昇により劣化した床スラブにおける貫通孔から、集合継手が自重により抜け落ちるのを防ぐことができる。 Also, in this case, since the lower end of the sound insulation cover is placed between the top and bottom surfaces of the floor slab, if the sound insulation cover is placed on the step formed around the through hole of the floor slab, In this case, the sound insulating cover engages with the stepped portion of the floor slab in the vertical direction. Therefore, by the sound insulating cover being caught on the stepped portion of the floor slab, it is possible to prevent the collective joint from falling out due to its own weight from the through hole in the floor slab that has deteriorated due to a rise in temperature.

また、前記集合継手および前記遮音カバーのうち、少なくともいずれか一方の外周面には、熱膨張性シートが全周にわたって貼付されてもよい。
この場合には、集合継手および前記遮音カバーのうち、少なくともいずれか一方の外周面に、熱膨張性シートが全周にわたって貼付されているので、熱膨張性シートが膨張することで、床スラブの上層階に階下からの熱が伝わるのを防ぐことができる。 Moreover, a thermally expandable sheet may be attached to the outer peripheral surface of at least one of the collective joint and the sound insulation cover over the entire circumference.
In this case, since a thermally expandable sheet is attached to the entire circumference of at least one of the collective joint and the sound insulation cover, the expansion of the thermally expandable sheet causes the floor slab to It can prevent heat from being transmitted from downstairs to the upper floors.

本発明によれば、施工される建築構造物の床スラブを介して異音が生じるのを確実に抑制することができる。 According to the present invention, it is possible to reliably suppress abnormal noise from occurring through the floor slab of a building structure being constructed.

本発明の第１実施形態に係る配管構造における集合継手の正面図である。FIG. 2 is a front view of a collective joint in the piping structure according to the first embodiment of the present invention. 本発明の第１実施形態に係る配管構造を示す一部断面正面図である。FIG. 1 is a partially sectional front view showing a piping structure according to a first embodiment of the present invention. 図２に示す吸音シートの平面図である。3 is a plan view of the sound absorbing sheet shown in FIG. 2. FIG. 図２に示す遮音シート２２の平面図である。3 is a plan view of the sound insulation sheet 22 shown in FIG. 2. FIG. 図２に示す吸音シートの端部同士を接着テープにより貼り合わせた状態を示す背面図である。FIG. 3 is a rear view showing a state in which the ends of the sound-absorbing sheet shown in FIG. 2 are pasted together with an adhesive tape. 本発明の第２実施形態に係る配管構造を示す一部断面正面図である。FIG. 7 is a partially sectional front view showing a piping structure according to a second embodiment of the present invention. 図６に示す配管構造の変形例を示す一部断面正面図である。7 is a partially sectional front view showing a modification of the piping structure shown in FIG. 6. FIG. 本発明の第３実施形態に係る配管構造を示す一部断面正面図である。FIG. 7 is a partially sectional front view showing a piping structure according to a third embodiment of the present invention. 図８に示す配管構造の変形例を示す一部断面正面図である。9 is a partially sectional front view showing a modification of the piping structure shown in FIG. 8. FIG.

（第１実施形態）
以下、図１から図５を参照し、本発明の第１実施形態に係る配管構造１について説明する。
図１および図２に示すように、本実施形態に係る配管構造１は、集合継手（集合管継手）１０と、この集合継手を覆う遮音カバー２０と、を備えている。
集合継手１０は、上部接続管１１と、上部接続管１１に接続された下部接続管１２と、を備えている。上部接続管１１は、第１の縦管Ｐ１に接続可能な縦管接続部１３と、縦管接続部１３の側面に突設されて横管Ｐ３を接続可能な横管接続部１４と、を有している。上部接続管１１の上端部に第１の縦管Ｐ１が接続される。 (First embodiment)
Hereinafter, with reference to FIGS. 1 to 5, a piping structure 1 according to a first embodiment of the present invention will be described.
As shown in FIGS. 1 and 2, the piping structure 1 according to the present embodiment includes a collective joint (collective pipe joint) 10 and a sound insulating cover 20 that covers the collective joint.
The collective joint 10 includes an upper connecting pipe 11 and a lower connecting pipe 12 connected to the upper connecting pipe 11. The upper connecting pipe 11 includes a vertical pipe connecting part 13 connectable to the first vertical pipe P1, and a horizontal pipe connecting part 14 protruding from the side surface of the vertical pipe connecting part 13 to which the horizontal pipe P3 can be connected. have. A first vertical pipe P1 is connected to the upper end of the upper connecting pipe 11.

以下の説明において、縦管接続部１３の中心軸線Ｏに沿う方向を軸方向といい、軸方向に沿う縦管接続部１３の上部接続管１１側を上方、下部接続管１２側を下方という。また、軸方向から見た平面視で、中心軸線Ｏと直交する方向を径方向といい、軸方向から見た平面視で中心軸線Ｏ回りに周回する方向を周方向という。 In the following description, the direction along the central axis O of the vertical tube connecting portion 13 is referred to as the axial direction, the upper connecting tube 11 side of the vertical tube connecting portion 13 along the axial direction is referred to as upper, and the lower connecting tube 12 side is referred to as lower. In addition, the direction perpendicular to the central axis O when seen from the axial direction is called the radial direction, and the direction that goes around the central axis O when seen from the axial direction is called the circumferential direction.

縦管接続部１３の上端部には、径方向の外側に向けて突出するリブ１９が複数形成されている。図示の例では、リブ１９は軸方向に間隔をあけて３つ配置されているとともに、周方向に間隔をあけて４組配置されている。
４組のリブ１９は、互いに等間隔に配置されている。リブ１９の径方向の大きさは、後述する遮音シート２２の径方向の厚みよりも小さくなっている。
集合継手１０を建築構造物に施工する際に、支持金具（図示せず）がリブ１９に対して径方向の外側から当接することで保持される。 A plurality of ribs 19 are formed at the upper end portion of the vertical tube connection portion 13 and project toward the outside in the radial direction. In the illustrated example, three ribs 19 are arranged at intervals in the axial direction, and four sets of ribs 19 are arranged at intervals in the circumferential direction.
The four sets of ribs 19 are arranged at equal intervals. The radial size of the rib 19 is smaller than the radial thickness of a sound insulating sheet 22, which will be described later.
When constructing the collective joint 10 in a building structure, the support metal fittings (not shown) are held in contact with the ribs 19 from the outside in the radial direction.

横管接続部１４は、縦管接続部１３の周壁から径方向の外側に向けて延びている。図示の例では横管接続部１４は３つ配置されている。
３つの横管接続部１４のうちの２つが中心軸線Ｏを径方向に挟む位置に各別に配置されている。残りの横管接続部１４は、径方向のうち、前記２つの横管接続部１４それぞれが延びる方向と、上面視で９０°をなす方向に延びている。なお、このような態様に限られず、横管接続部１４の数量および延びる方向は、任意に変更することができる。
図１に示すように、横管接続部１４における径方向の外端部には、横管Ｐ３が各別に接続される接続環１５が取付けられている。接続環１５の外径は、横管接続部１４の外径よりも大きくなっている。 The horizontal pipe connection part 14 extends radially outward from the peripheral wall of the vertical pipe connection part 13. In the illustrated example, 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 tube connecting portions 14 extend in a radial direction that makes an angle of 90° with the direction in which the two horizontal tube connecting portions 14 extend, as viewed from above. Note that the present invention is not limited to this embodiment, and the number and extending direction of the horizontal pipe connecting portions 14 can be changed as desired.
As shown in FIG. 1, connecting rings 15 are attached to the radially outer ends of the horizontal pipe connecting portions 14 to which the horizontal pipes P3 are individually connected. The outer diameter of the connecting ring 15 is larger than the outer diameter of the horizontal pipe connecting portion 14.

集合継手１０における上部接続管１１および下部接続管１２を、透明にしてもよい。これにより、上部接続管１１および下部接続管１２の接続状態を視認することができる。また、非熱膨張黒鉛や水酸化マグネシウムなどの難燃剤を配合しても良い。 The upper connecting pipe 11 and the lower connecting pipe 12 in the collective joint 10 may be made transparent. Thereby, the connection state of the upper connecting pipe 11 and the lower connecting pipe 12 can be visually confirmed. Further, a flame retardant such as non-thermal expandable graphite or magnesium hydroxide may be added.

下部接続管１２は、上方よりも下方が縮径された管状をなしている。下部接続管１２は、上端部に位置し、上部接続管１１の下方に接続される接続管部１６と、接続管部１６の下方に接続されるとともに、下方に向かうに従い漸次、縮径する傾斜管部１７と、傾斜管部１７の下端部に接続されるとともに、第２の縦管Ｐ２が接続される下側管部１８と、を備えている。接続管部１６、傾斜管部１７、および下側管部１８は、例えば合成樹脂材料の射出成形により一体に形成されている。 The lower connecting pipe 12 has a tubular shape whose diameter is smaller at the bottom than at the top. The lower connecting pipe 12 has a connecting pipe part 16 located at the upper end and connected to the lower part of the upper connecting pipe 11, and an inclined part 16 which is connected to the lower part of the connecting pipe part 16 and whose diameter gradually decreases as it goes downward. It includes a tube section 17 and a lower tube section 18 connected to the lower end of the inclined tube section 17 and to which the second vertical tube P2 is connected. The connecting tube portion 16, the inclined tube portion 17, and the lower tube portion 18 are integrally formed, for example, by injection molding of a synthetic resin material.

接続管部１６の外径は、上部接続管１１における縦管接続部１３の外径と同等になっている。傾斜管部１７の下端部における外径は、接続管部１６の外径よりも小さくなっている。傾斜管部１７の軸方向の大きさは、接続管部１６の軸方向の大きさよりも大きくなっている。 The outer diameter of the connecting pipe portion 16 is equal to the outer diameter of the vertical pipe connecting portion 13 in the upper connecting pipe 11. The outer diameter at the lower end of the inclined tube section 17 is smaller than the outer diameter of the connecting tube section 16. The axial size of the inclined pipe portion 17 is larger than the axial size of the connecting pipe portion 16.

接続管部１６は、ポリ塩化ビニル系樹脂と熱膨張性黒鉛とを含有する樹脂組成物を含有する。すなわち、接続管部１６は、樹脂組成物を成形することによって作製される。通常、接続管部１６は、樹脂組成物を押出成形することによって作製される。
接続管部１６は、接続管部１６の全体が樹脂組成物からなる単層構造でもよいし、複数の層からなる複層構造でもよい。複層構造の場合、いずれかの層が樹脂組成物から形成されていればよい。例えば、接続管部１６が、表層と中間層と内層とからなる３層構造である場合には、中間層が樹脂組成物から形成されたものが挙げられ、表層、中間層、内層は前記吸熱剤を含有していてもよい。 The connecting pipe portion 16 contains a resin composition containing a polyvinyl chloride resin and thermally expandable graphite. That is, the connecting pipe portion 16 is produced by molding a resin composition. Usually, the connecting pipe portion 16 is produced by extrusion molding a resin composition.
The connecting tube portion 16 may have a single layer structure in which the entire connecting tube portion 16 is made of a resin composition, or may have a multilayer structure consisting of a plurality of layers. In the case of a multilayer structure, any layer may be formed from a resin composition. For example, when the connecting pipe portion 16 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 are It may contain an agent.

中間層は熱膨張性黒鉛を含有するため黒色を呈する。そのため、表層と内層は黒色以外の着色剤を含有させ、中間層と区別可能にしておくことが好ましい。
表層および内層の厚みとしては、それぞれ０．３ｍｍ以上３．０ｍｍ以下であることが好ましく、０．６ｍｍ以上１．５ｍｍ以下が好ましい。被覆層の厚みが０．３ｍｍ以上であれば、管としての機械的強度を充分に確保でき、３．０ｍｍ以下であれば、耐火性の低下を抑制できる。
また、接続管部１６は、ＪＩＳＫ６７４１に記載の性能を満たすものであることが好ましい。 The intermediate layer has a black color because it contains thermally expandable graphite. Therefore, it is preferable that the surface layer and the inner layer contain a coloring agent other than black so that they can be distinguished from the intermediate layer.
The thickness of the surface layer and the inner layer is 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, a decrease in fire resistance can be suppressed.
Further, it is preferable that the connecting pipe portion 16 satisfies the performance described in JIS K6741.

下側管部１８の外径は、接続管部１６の外径よりも小さく、かつ傾斜管部１７における下端部の外径よりも大きくなっている。下側管部１８の軸方向の大きさは、接続管部１６の軸方向の大きさよりも小さくなっている。下側管部１８の内側に、第２の縦管Ｐ２が下方から嵌合されることにより、第２の縦管Ｐ２が下部接続管１２に接続される。 The outer diameter of the lower tube section 18 is smaller than the outer diameter of the connecting tube section 16 and larger than the outer diameter of the lower end of the inclined tube section 17. The axial size of the lower tube portion 18 is smaller than the axial size of the connecting tube portion 16. The second vertical tube P2 is connected to the lower connecting tube 12 by fitting into the inside of the lower tube portion 18 from below.

そして図２に示すように、本実施形態に係る遮音カバー２０は、上部接続管１１に径方向の外側から巻きつけられて縦管接続部１３を覆う吸音シート（吸音層）２１と、吸音シート２１を覆う遮音シート２２（遮音層）２２と、を有している。吸音シート２１および遮音シート２２はそれぞれ、可撓性を有している。 As shown in FIG. 2, the sound insulation cover 20 according to the present embodiment includes a sound absorption sheet (sound absorption layer) 21 that is wrapped around the upper connection pipe 11 from the outside in the radial direction and covers the vertical pipe connection part 13, and a sound absorption sheet It has a sound insulating sheet 22 (sound insulating layer) 22 that covers 21. The sound absorbing sheet 21 and the sound insulating sheet 22 each have flexibility.

吸音シート２１は、縦管接続部１３に巻きつけられる前の状態で矩形状を呈している。吸音シート２１は、正面視で縦方向よりも横方向（長辺方向）に長い矩形状を呈している。吸音シート２１は、縦方向が集合継手１０の軸方向と一致するように、上部接続管１１に取付けられる。
吸音シート２１には、横管接続部１４が嵌合される第１嵌合口２４が形成されている。図示の例では、第１嵌合口２４は、横方向に間隔をあけて３つ配置されている。 The sound absorbing sheet 21 has a rectangular shape before being wrapped around the vertical pipe connecting portion 13. The sound absorbing sheet 21 has a rectangular shape that is longer in the horizontal direction (long side direction) than in the vertical direction when viewed from the front. The sound absorbing sheet 21 is attached to the upper connecting pipe 11 so that its longitudinal direction coincides with the axial direction of the collective joint 10.
A first fitting opening 24 into which the horizontal pipe connecting portion 14 is fitted is formed in the sound absorbing sheet 21 . In the illustrated example, three first fitting ports 24 are arranged at intervals in the lateral direction.

第１嵌合口２４は、正面視で楕円状をなし、長軸方向が縦方向と一致し、短軸方向が横方向と一致する。
そして第２嵌合口２５は、横管接続部１４が挿通されることにより、横方向に広げられて真円形状を呈する。第２嵌合口２５の形状としてはこのような態様に限られず、例えば長円状や、ひし形状等であってもよい。 The first fitting opening 24 has an elliptical shape when viewed from the front, with the major axis direction coinciding with the vertical direction and the minor axis direction coinciding with the horizontal direction.
The second fitting opening 25 is expanded laterally and assumes a perfect circular shape when the horizontal pipe connecting portion 14 is inserted therethrough. The shape of the second fitting opening 25 is not limited to this embodiment, and may be, for example, an oval shape, a diamond shape, or the like.

吸音シート２１には、縦管接続部１３のリブ１９が内側に配置される窓２１Ａが形成されている。窓２１Ａは横方向に間隔をあけて複数配置されている。図示の例では、２つの窓２１Ａが配置されている。窓２１Ａは正面視で縦方向よりも横方向に長い矩形状を呈している。窓２１Ａは、吸音シート２１のうち、第２嵌合口２５の上方に位置する部分に各別に配置されている。 The sound-absorbing sheet 21 is formed with a window 21A in which the rib 19 of the vertical tube connection portion 13 is arranged. A plurality of windows 21A are arranged at intervals in the horizontal direction. In the illustrated example, two windows 21A are arranged. The window 21A has a rectangular shape that is longer in the horizontal direction than in the vertical direction when viewed from the front. The windows 21A are separately arranged in the portions of the sound absorbing sheet 21 located above the second fitting openings 25.

吸音シート２１にはまた、縦管接続部１３のリブ１９が内側に配置される開口部２１Ｂが形成されている。開口部２１Ｂは、吸音シート２１の横方向の両端部に一対配置されている。一対の開口部２１Ｂは、縦方向の外側に向けて開口している。
開口部２１Ｂは、正面視で縦方向よりも横方向に長い矩形状を呈している。開口部２１Ｂの縦方向の位置は、窓２１Ａの縦方向の位置と一致している。一対の窓２１Ａは、吸音シート２１の両端部が重ねられた状態で、内側にリブ１９が配置される。 The sound-absorbing sheet 21 is also formed with an opening 21B in which the rib 19 of the vertical tube connection portion 13 is arranged. A pair of openings 21B are arranged at both ends of the sound absorbing sheet 21 in the lateral direction. The pair of openings 21B open outward in the vertical direction.
The opening 21B has a rectangular shape that is longer in the horizontal direction than in the vertical direction when viewed from the front. The vertical position of the opening 21B matches the vertical position of the window 21A. The ribs 19 are arranged inside the pair of windows 21A, with both ends of the sound-absorbing sheet 21 being overlapped.

吸音シート２１は、繊維材料によりシート状に形成されている。吸音シート２１の素材としては、例えばフェルト、グラスウール、ロックウール等を採用することができる。吸音シート２１の厚みは１～２０ｍｍで面密度は０．１～２ｋｇ／ｍ^２となっている。
なお、吸音シート２１の材料としては、繊維材料でなくてもよく、上記厚みおよび面密度の範囲内であれば、発泡ウレタン、発泡ポリエチレン、発泡ポリプロピレンのような多孔質材料を用いても良い。 The sound absorbing sheet 21 is formed into a sheet shape from a fiber material. As the material for the sound absorbing sheet 21, for example, felt, glass wool, rock wool, etc. can be used. The thickness of the sound absorbing sheet 21 is 1 to 20 mm, and the areal density is 0.1 to 2 kg/m ² .
Note that the material for the sound-absorbing sheet 21 does not need to be a fiber material, and may be a porous material such as urethane foam, polyethylene foam, or polypropylene foam, as long as the thickness and areal density are within the above ranges.

図４に示すように、遮音シート２２は、正面視で縦方向よりも横方向（長辺方向）に長い矩形帯状を呈している。遮音シート２２は、縦方向が集合継手１０の軸方向と一致するように、上部接続管１１に取付けられる。
遮音シート２２には、横管接続部１４が嵌合される第２嵌合口２５が形成されている。図示の例では、第２嵌合口２５は、横方向に間隔をあけて３つ配置されている。 As shown in FIG. 4, the sound insulating sheet 22 has a rectangular band shape that is longer in the horizontal direction (long side direction) than in the vertical direction when viewed from the front. The sound insulating sheet 22 is attached to the upper connecting pipe 11 so that its longitudinal direction coincides with the axial direction of the collective joint 10.
A second fitting opening 25 into which the horizontal pipe connecting portion 14 is fitted is formed in the sound insulating sheet 22 . In the illustrated example, three second fitting ports 25 are arranged at intervals in the lateral direction.

第２嵌合口２５は、正面視で楕円状をなし、長軸方向が縦方向と一致し、短軸方向が横方向と一致している。
そして第２嵌合口２５は、横管接続部１４が挿通されることにより、横方向に広げられて真円形状を呈する。第２嵌合口２５の形状としてはこのような態様に限られず、例えば長円状や、ひし形状等であってもよい。 The second fitting opening 25 has an elliptical shape when viewed from the front, with the major axis direction coinciding with the vertical direction and the minor axis direction coinciding with the horizontal direction.
The second fitting opening 25 is expanded laterally and assumes a perfect circular shape when the horizontal pipe connecting portion 14 is inserted therethrough. The shape of the second fitting opening 25 is not limited to this embodiment, and may be, for example, an oval shape, a diamond shape, or the like.

遮音シート２２のうち、縦方向の両端縁には、正面視で三角形状をなす切欠き２２Ａが一対形成されている。一対の切欠き２２Ａは、横方向に間隔をあけて２組配置されている。切欠き２２Ａは遮音シート２２の横方向の両端部を重ね合わせる際に、位置合わせとして用いられる。切欠き２２Ａの形状としては三角形状に限られず、任意に変更することができる。 A pair of notches 22A having a triangular shape when viewed from the front are formed at both ends of the sound insulating sheet 22 in the vertical direction. Two pairs of notches 22A are arranged at intervals in the lateral direction. The notch 22A is used for positioning when the horizontal ends of the sound insulating sheet 22 are overlapped. The shape of the notch 22A is not limited to a triangular shape, and can be arbitrarily changed.

遮音シート２２を吸音シート２１の径方向の外側に巻きつける際には、第２嵌合口２５が拡がるように遮音シート２２を弾性変形させながら、横管接続部１４が第２嵌合口２５に挿入されて嵌合される。このため、遮音シート２２の弾性復元力により、第２嵌合口２５の内周縁部が、横管接続部１４の外周面に密に当接している。 When wrapping the sound insulating sheet 22 around the outside of the sound absorbing sheet 21 in the radial direction, the horizontal pipe connecting portion 14 is inserted into the second fitting port 25 while elastically deforming the sound insulating sheet 22 so that the second fitting port 25 expands. and then mated. Therefore, due to the elastic restoring force of the sound insulating sheet 22, the inner circumferential edge of the second fitting opening 25 is brought into close contact with the outer circumferential surface of the horizontal pipe connecting portion 14.

遮音シート２２の横方向の両端部同士は、縦管接続部１３の側面のうち、横管接続部１４が突設されていない部分で互いに接続される。
図５に示すように、遮音シート２２の横方向の両端部同士は、２組の切欠き２２Ａ同士を重ねるように、径方向に互いに重ね合わされた状態で、接着テープ４０により固定される。図示の例では、接着テープ４０の横方向の大きさは、２組の開口部２１Ｂ同士の間の横方向の間隔と同等となっている。 Both end portions of the sound insulating sheet 22 in the lateral direction are connected to each other at a portion of the side surface of the vertical tube connecting portion 13 where the horizontal tube connecting portion 14 is not protruded.
As shown in FIG. 5, both ends of the sound insulating sheet 22 in the lateral direction are fixed with adhesive tape 40 in a state in which they are overlapped in the radial direction so that the two sets of notches 22A are overlapped. In the illustrated example, the lateral size of the adhesive tape 40 is equivalent to the lateral spacing between the two sets of openings 21B.

接着テープ４０としては、例えば接着性および止水性のあるブチルゴムテープ等を用いることができる。
なお、遮音シート２２の両端部同士は、接着テープ４０に代えて、接着剤により互いに接続されてもよい。また、両端部に設けられたファスナーや面ファスナー等により着脱可能に接続されてもよい。 As the adhesive tape 40, for example, a butyl rubber tape having adhesive properties and waterproof properties can be used.
Note that both ends of the sound insulating sheet 22 may be connected to each other with an adhesive instead of the adhesive tape 40. Further, the connection may be made detachable using a fastener or hook-and-loop fastener provided at both ends.

遮音シート２２は、基材樹脂１００重量部に対して、無機フィラーを３００～３０００重量部含有する樹脂組成物により形成されている。基材樹脂としては、オレフィン系樹脂を採用することができる。遮音シート２２の厚みは１～５ｍｍで、面密度は１～８ｋｇ／ｍ^２である。
なお、遮音シート２２の基材樹脂としては、オレフィン系樹脂に限られず、改質アスファルトやエラストマー、ゴム、ポリオレフィン樹脂、軟質塩化ビニル樹脂等といった弾性を備えた材料であってもよい。 The sound insulation sheet 22 is formed from a resin composition containing 300 to 3000 parts by weight of an inorganic filler based on 100 parts by weight of a base resin. As the base resin, an olefin resin can be used. The thickness of the sound insulation sheet 22 is 1 to 5 mm, and the areal density is 1 to 8 kg/m ² .
Note that the base resin of the sound insulation sheet 22 is not limited to olefin resins, and may be materials with elasticity such as modified asphalt, elastomers, rubber, polyolefin resins, soft vinyl chloride resins, and the like.

無機フィラーとしては、例えば、シリカ、珪藻土、アルミナ、酸化亜鉛、酸化チタン、酸化カルシウム、酸化マグネシウム、酸化鉄、酸化錫、酸化アンチモン、フェライト類、水酸化カルシウム、水酸化マグネシウム、水酸化アルミニウム、塩基性炭酸マグネシウム、炭酸カルシウム、炭酸マグネシウム、炭酸亜鉛、炭酸バリウム、ドーンナイト、ハイドロタルサイト、硫酸カルシウム、硫酸バリウム、石膏繊維、ケイ酸カルシウム、タルク、クレー、マイカ、モンモリロナイト、ベントナイト、活性白土、セピオライト、イモゴライト、セリサイト、ガラス繊維、ガラスビーズ、シリカ系バルン、窒化アルミニウム、窒化ホウ素、窒化ケイ素、カーボンブラック、グラファイト、炭素繊維、炭素バルン、木炭粉末、各種金属粉、チタン酸カリウム、硫酸マグネシウム、チタン酸ジルコン酸鉛、アルミニウムボレート、硫化モリブデン、炭化ケイ素、ステンレス繊維、ホウ酸亜鉛、各種磁性粉、スラグ繊維、フライアッシュ、脱水汚泥等が挙げられ、これらのうち、重量とコストのバランスから炭酸カルシウム、硫酸バリウムを用いることが好ましい。なお、これらは、単独でも、２種以上を混合して用いてもよい。 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, and bases. Magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawnite, hydrotalcite, calcium sulfate, barium sulfate, gypsum fiber, calcium silicate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite , imogolite, sericite, glass fiber, glass beads, silica balloons, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balloons, 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 fibers, fly ash, dehydrated sludge, etc. Among these, carbonate is used due to the balance of weight and cost. Preferably, calcium or barium sulfate is used. Note that these may be used alone or in combination of two or more.

遮音シート２２は可撓性を有している。遮音シート２２の引張弾性率は５～５００ｋｇ／ｃｍ^２であることが好ましい。集合継手１０に巻きつけることが容易であるためである。１００ｋｇ／ｃｍ^２程度が柔らかすぎず、硬すぎず巻きやすい。
なお、遮音シート２２の片面または両面に、合成繊維不織布やガラス繊維不織布等の表面材を積層してもよい。 The sound insulating sheet 22 has flexibility. The tensile modulus of the sound insulation sheet 22 is preferably 5 to 500 kg/cm ² . This is because it is easy to wrap around the collective joint 10. ^Around 100kg/cm2 is neither too soft nor too hard and easy to roll.
Note that a surface material such as a synthetic fiber nonwoven fabric or a glass fiber nonwoven fabric may be laminated on one or both sides of the sound insulation sheet 22.

そして本実施形態では、集合継手１０の下部は、建築構造物の床スラブ５０内に埋設されている。床スラブ５０には貫通孔５１が形成されている。
集合継手１０の下部は、床スラブ５０の貫通孔５１内に挿入されている。貫通孔５１の内周面のうち、下側に位置する部分には、径方向の内側に向けて張り出した段部５２が形成されている。
段部５２は筒状に形成され、貫通孔５１と同軸に配置されている。段部５２には、上方を向く載置面５２Ａが形成されている。 In this embodiment, the lower part of the collective joint 10 is buried in the floor slab 50 of the building structure. A through hole 51 is formed in the floor slab 50.
The lower part of the collective joint 10 is inserted into the through hole 51 of the floor slab 50. A step portion 52 projecting radially inward is formed in a lower portion of the inner circumferential surface of the through hole 51 .
The stepped portion 52 is formed in a cylindrical shape and is arranged coaxially with the through hole 51. The stepped portion 52 is formed with a mounting surface 52A that faces upward.

そして遮音カバー２０の下端部は、床スラブ５０の上面５０Ａと下面５０Ｂとの間に配置されている。遮音カバー２０の下端部は、貫通孔５１内における段部５２の載置面５２Ａに載置されている。
貫通孔５１の内径は、遮音カバー２０の外径よりも大きくなっている。貫通孔５１の段部５２の内径は、径方向に対向する集合継手１０の下部接続管１２における接続管部１６の外径よりも大きくなっている。 The lower end portion of the sound insulation cover 20 is arranged between the upper surface 50A and the lower surface 50B of the floor slab 50. The lower end portion of the sound insulation cover 20 is placed on the placement surface 52A of the stepped portion 52 in the through hole 51.
The inner diameter of the through hole 51 is larger than the outer diameter of the sound insulation cover 20. The inner diameter of the stepped portion 52 of the through hole 51 is larger than the outer diameter of the connecting pipe portion 16 of the lower connecting pipe 12 of the collective joint 10 that faces the radially opposite one.

また、本実施形態では、集合継手１０のうち、少なくとも床スラブ５０内に埋設された部分は、熱膨張管とされている。図示の例では、下部接続管１２の接続管部１６が熱膨張管とされている。
熱膨張管は、例えば床スラブ５０の階下で火災が発生する等して加熱されることで、膨張して拡径する。これにより、接続管部１６の外周面が、床スラブ５０における貫通孔５１内の段部５２の内周面に当接する。このようにして、火災により発生した炎や熱が、床スラブ５０の上の階に伝わることなく、遮断される。 Furthermore, in this embodiment, at least a portion of the collective joint 10 buried within the floor slab 50 is a thermal expansion tube. In the illustrated example, the connecting pipe portion 16 of the lower connecting pipe 12 is a thermal expansion tube.
The thermal expansion tube expands and expands in diameter when it is heated, for example due to a fire occurring below the floor slab 50. As a result, the outer circumferential surface of the connecting pipe portion 16 comes into contact with the inner circumferential surface of the stepped portion 52 in the through hole 51 in the floor slab 50. In this way, flames and heat generated by a fire are blocked without being transmitted to the floor above the floor slab 50.

ここで、床スラブ５０への配管構造からの振動の伝達について説明する。
集合継手１０の内部に排水が流下すると、排水が集合継手１０の内面に衝突することで集合継手１０が振動する。この振動が集合継手１０の外周面から貫通孔５１の内周面を介して床スラブ５０に伝達されることがある。 Here, transmission of vibration from the piping structure to the floor slab 50 will be explained.
When the drainage water flows down inside the collective joint 10, the drainage water collides with the inner surface of the collective joint 10, causing the collective joint 10 to vibrate. This vibration may be transmitted from the outer peripheral surface of the collective joint 10 to the floor slab 50 via the inner peripheral surface of the through hole 51.

ここで一般に、床スラブ５０の貫通孔５１から内周面に伝達された振動は、床スラブ５０の上面５０Ａおよび下面５０Ｂにおいて顕著に伝達される。振動のエネルギーが表面に偏ることで、減衰が小さく振幅が大きくなるためである。
このため、本実施形態の配管構造１では、遮音カバー２０の下端部を段部５２に配置することで、集合継手１０の外周面と、床スラブ５０の上面５０Ａにおける貫通孔５１の開口周縁部と、の間に遮音カバー２０を介在させている。 Generally, vibrations transmitted from the through holes 51 of the floor slab 50 to the inner peripheral surface are significantly transmitted to the upper surface 50A and the lower surface 50B of the floor slab 50. This is because vibration energy is biased towards the surface, resulting in less damping and larger amplitude.
Therefore, in the piping structure 1 of the present embodiment, by arranging the lower end of the sound insulation cover 20 at the step part 52, the outer peripheral surface of the collective joint 10 and the opening peripheral edge of the through hole 51 on the upper surface 50A of the floor slab 50 A sound insulating cover 20 is interposed between.

以上説明したように、本実施形態に係る配管構造によれば、集合継手１０が床スラブ５０に形成された貫通孔５１内に挿入され、集合継手１０の下部が、床スラブ５０内に埋設されている。そして、集合継手１０を覆う遮音カバー２０の下端部が、床スラブ５０の上面５０Ａと下面５０Ｂとの間に配置されている。このため、集合継手１０の外周面と、床スラブ５０の上面５０Ａにおける集合継手１０の貫通孔５１の開口周縁部と、の間に遮音カバー２０を介在させることができる。 As explained above, according to the piping structure according to the present embodiment, the collective joint 10 is inserted into the through hole 51 formed in the floor slab 50, and the lower part of the collective joint 10 is buried in the floor slab 50. ing. The lower end of the sound insulating cover 20 covering the collective joint 10 is arranged between the upper surface 50A and the lower surface 50B of the floor slab 50. Therefore, the sound insulating cover 20 can be interposed between the outer peripheral surface of the collective joint 10 and the opening peripheral portion of the through hole 51 of the collective joint 10 on the upper surface 50A of the floor slab 50.

これにより、床スラブ５０のうち、集合継手１０からの振動が顕著に伝わりやすい上面５０Ａに、集合継手１０からの振動が伝わるのを、遮音カバー２０の吸音シート２１および遮音シート２２により遮断することが可能になる。このようにして、施工される建築構造物の床スラブ５０を介して異音が生じるのを確実に抑制することができる。 As a result, the sound-absorbing sheet 21 and the sound-insulating sheet 22 of the sound-insulating cover 20 can block vibrations from the collective joint 10 from being transmitted to the upper surface 50A of the floor slab 50, to which vibrations from the collective joint 10 are particularly likely to be transmitted. becomes possible. In this way, it is possible to reliably suppress abnormal noise from occurring through the floor slab 50 of the building structure being constructed.

また、集合継手１０のうち、床スラブ５０内に埋設された部分が熱膨張管であるため、仮に床スラブ５０の階下で火災等による温度上昇があった場合に、熱膨張管が膨張することで、床スラブ５０の上層階に階下からの熱が伝わるのを防ぐことができる。 In addition, since the part of the collective joint 10 that is buried within the floor slab 50 is a thermal expansion tube, if there is a temperature rise due to a fire or the like below the floor slab 50, the thermal expansion tube will not expand. This can prevent heat from being transmitted from downstairs to the upper floors of the floor slab 50.

またこの際、遮音カバー２０の下端部が、床スラブ５０の上面５０Ａと下面５０Ｂとの間、すなわち、床スラブ５０の貫通孔５１周りに形成された段部５２に配置されているので、遮音カバー２０が床スラブ５０の段部５２と上下方向に係合していることとなる。このため、遮音カバー２０が床スラブ５０の段部５２に引っかかることで、温度上昇により劣化した床スラブ５０における集合継手１０の貫通孔５１から、集合継手１０が自重により抜け落ちるのを防ぐことができる。 In addition, at this time, since the lower end of the sound insulation cover 20 is disposed between the upper surface 50A and the lower surface 50B of the floor slab 50, that is, at the stepped portion 52 formed around the through hole 51 of the floor slab 50, the sound insulation This means that the cover 20 is engaged with the stepped portion 52 of the floor slab 50 in the vertical direction. Therefore, the sound insulating cover 20 is caught on the stepped portion 52 of the floor slab 50, thereby preventing the collective joint 10 from falling out due to its own weight from the through hole 51 of the collective joint 10 in the floor slab 50, which has deteriorated due to a rise in temperature. .

次に、本実施形態の第２実施形態に係る配管構造２について、図６および図７を用いて説明する。なお、以下の説明において、第１実施形態と同一の構成については同一の符号を付し、その説明を省略する。
図６に示すように、遮音カバー２０の下端部には、全周にわたって発泡テープ３０が貼付されている。 Next, a piping structure 2 according to a second embodiment of the present embodiment will be described using FIGS. 6 and 7. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
As shown in FIG. 6, a foamed tape 30 is attached to the lower end of the sound insulating cover 20 over the entire circumference.

発泡テープ３０は薄膜状をなしている。発泡テープ３０は集合継手１０の外周面と、遮音シート２２の外周面と、にまたがって貼付されている。このため、発泡テープ３０は吸音シート２１および遮音シート２２の下端縁を閉塞している。 The foam tape 30 is in the form of a thin film. The foam tape 30 is attached across the outer circumferential surface of the collective joint 10 and the outer circumferential surface of the sound insulating sheet 22. Therefore, the foam tape 30 closes the lower edges of the sound absorbing sheet 21 and the sound insulating sheet 22.

なお、発泡テープ３１は、図７に示すような変形例に係る配管構造２Ｂのように、径方向の厚みをそなえてもよい。本変形例に係る発泡テープ３１は、径方向に所定の厚みを備え、集合継手１０の外周面のうち、吸音シート２１の下側に連なる部分に配置されている。
発泡テープ３１の径方向の厚みは、吸音シート２１の径方向の厚みと同等となっている。発泡テープ３１の外周面と、遮音シート２２の外周面と、にまたがって接着シール３３が貼付されている。 Note that the foamed tape 31 may have a thickness in the radial direction, as in a piping structure 2B according to a modified example as shown in FIG. The foamed tape 31 according to this modification has a predetermined thickness in the radial direction, and is disposed on a portion of the outer circumferential surface of the collective joint 10 that is continuous with the lower side of the sound-absorbing sheet 21.
The thickness of the foam tape 31 in the radial direction is equal to the thickness of the sound absorbing sheet 21 in the radial direction. An adhesive seal 33 is attached across the outer circumferential surface of the foam tape 31 and the outer circumferential surface of the sound insulating sheet 22.

次に、本実施形態の第３実施形態に係る配管構造３について、図８および図９を用いて説明する。なお、以下の説明において、第１実施形態と同一の構成については同一の符号を付し、その説明を省略する。
図８に示すように、集合継手１０および遮音カバー２０のうち、少なくともいずれか一方の外周面には、熱膨張性シート３２が全周にわたって貼付されている。図示の例では、集合継手１０の外周面に熱膨張性シート３２が貼付されている。 Next, a piping structure 3 according to a third embodiment of the present embodiment will be described using FIGS. 8 and 9. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
As shown in FIG. 8, a thermally expandable sheet 32 is attached to the outer peripheral surface of at least one of the collective joint 10 and the sound insulation cover 20 over the entire circumference. In the illustrated example, a thermally expandable sheet 32 is attached to the outer peripheral surface of the collective joint 10.

熱膨張性シート３２は、上部接続管１１と下部接続管との間に貼付されている。熱膨張性シート３２のうち、上側に位置する部分には、吸音シート２１が径方向の外側から巻かれている。
熱膨張性シート３２は例えば床スラブ５０の階下で火災が発生する等して、加熱されることで膨張して拡径する。これにより、熱膨張性シート３２の径方向の外側に位置する遮音カバー２０が、床スラブ５０における貫通孔５１の内周面に当接する。このようにして、火災により発生した炎や熱が、床スラブ５０の上の階に伝わることなく、遮断される。 The thermally expandable sheet 32 is attached between the upper connecting tube 11 and the lower connecting tube. The sound absorbing sheet 21 is wrapped around the upper portion of the thermally expandable sheet 32 from the outside in the radial direction.
The thermally expandable sheet 32 expands and expands in diameter when it is heated, for example, when a fire occurs below the floor slab 50. As a result, the sound insulating cover 20 located on the radially outer side of the thermally expandable sheet 32 comes into contact with the inner circumferential surface of the through hole 51 in the floor slab 50. In this way, flames and heat generated by a fire are blocked without being transmitted to the floor above the floor slab 50.

なお、熱膨張性シート３２は、図９に示すような変形例に係る配管構造３Ｂのように、遮音カバー２０の外周面に貼付してもよい。この場合には、遮音カバー２０が熱により拡径することで、遮音カバー２０の外周面と、貫通孔５１の内周面とが当接する。これにより、火災により発生した炎や熱が、床スラブ５０の上の階に伝わることなく、遮断される。 Note that the thermally expandable sheet 32 may be attached to the outer circumferential surface of the sound insulating cover 20, as in a piping structure 3B according to a modified example as shown in FIG. In this case, the outer circumferential surface of the sound insulating cover 20 and the inner circumferential surface of the through hole 51 come into contact with each other as the sound insulating cover 20 expands in diameter due to heat. Thereby, flames and heat generated by a fire are blocked without being transmitted to the floor above the floor slab 50.

以上説明したように、本実施形態に係る配管構造３、３Ｂによれば、集合継手１０および前記遮音カバー２０のうち、少なくともいずれか一方の外周面に、熱膨張性シート３２が全周にわたって貼付されている。このため、熱膨張性シート３２が膨張することで、床スラブ５０の上層階に階下からの熱が伝わるのを防ぐことができる。 As explained above, according to the piping structures 3 and 3B according to the present embodiment, the thermally expandable sheet 32 is attached to the outer peripheral surface of at least one of the collective joint 10 and the sound insulation cover 20 over the entire circumference. has been done. Therefore, by expanding the thermally expandable sheet 32, it is possible to prevent heat from being transmitted from downstairs to the upper floor of the floor slab 50.

またこの際、遮音カバー２０の下端部が、床スラブ５０の上面５０Ａと下面５０Ｂとの間に配置されている。このため、仮に遮音カバー２０が、床スラブ５０の貫通孔５１周りに形成された段部５２に配置されている場合には、遮音カバー２０が床スラブ５０の段部５２と上下方向に係合していることとなる。
したがって、遮音カバー２０が床スラブ５０の段部５２に引っかかることで、温度上昇により劣化した床スラブ５０における集合継手１０の貫通孔５１から、集合継手１０が自重により抜け落ちるのを防ぐことができる。 Further, at this time, the lower end portion of the sound insulation cover 20 is arranged between the upper surface 50A and the lower surface 50B of the floor slab 50. Therefore, if the sound insulation cover 20 is placed on the step 52 formed around the through hole 51 of the floor slab 50, the sound insulation cover 20 will engage with the step 52 of the floor slab 50 in the vertical direction. That is what you are doing.
Therefore, by the sound insulating cover 20 being caught on the step portion 52 of the floor slab 50, it is possible to prevent the collective joint 10 from falling off due to its own weight from the through hole 51 of the collective joint 10 in the floor slab 50, which has deteriorated due to a rise in temperature.

なお、本発明の技術的範囲は前記実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。 Note that the technical scope of the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention.

例えば、上記各実施形態においては、遮音カバー２０は、正面視で縦方向よりも横方向に長い矩形帯状を呈している構成を示したが、このような態様に限られない。遮音カバー２０の正面視形状は任意に変更可能である。 For example, in each of the embodiments described above, the sound insulating cover 20 has a rectangular band shape that is longer in the horizontal direction than in the vertical direction when viewed from the front, but the present invention is not limited to such a configuration. The front view shape of the sound insulation cover 20 can be changed arbitrarily.

その他、本発明の趣旨に逸脱しない範囲で、前記実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、前記した変形例を適宜組み合わせてもよい。 In addition, without departing from the spirit of the present invention, the components in the embodiments described above may be replaced with well-known components as appropriate, and the above-described modifications may be combined as appropriate.

１、２、３配管構造
１０集合継手
２０遮音カバー
２１吸音シート（吸音層）
２２遮音シート（遮音層）
３０発泡テープ
３１発泡テープ
３２熱膨張性シート 1, 2, 3 Piping structure 10 Collective joint 20 Sound insulation cover 21 Sound absorption sheet (sound absorption layer)
22 Sound insulation sheet (sound insulation layer)
30 Foam tape 31 Foam tape 32 Thermal expandable sheet

Claims

a collective joint having a vertical pipe connection part that can be connected to a vertical pipe; and a horizontal pipe connection part that protrudes from a side surface of the vertical pipe connection part and can connect a horizontal pipe;
A piping structure comprising: a sound-absorbing layer that covers the vertical pipe connection portion; and a sound-insulating cover that covers the sound-absorbing layer and whose lateral direction is longer than the lateral direction of the sound-absorbing layer,
The sound insulation cover includes a sound absorption sheet that covers the vertical pipe connection portion, and a sound insulation sheet that covers the sound absorption sheet,
The sound absorbing sheet and the sound insulating sheet are provided with a fitting opening through which the horizontal pipe connection portion is inserted,
Both ends of the sound insulating sheet in the lateral direction are connected to each other in the radial direction at a portion of the side surface of the vertical pipe connection part where the horizontal pipe connection part does not protrude when viewed from the axial direction of the vertical pipe connection part. are connected to each other in a superimposed state,
The lower part of the vertical pipe connection part is buried in the floor slab of the building structure,
The lower end of the sound insulation cover is disposed between the upper surface and the lower surface of the floor slab,
Both ends of the sound insulation sheet are connected to each other by hook-and-loop fasteners provided at both ends.

a collective joint having a vertical pipe connection part that can be connected to a vertical pipe; and a horizontal pipe connection part that protrudes from a side surface of the vertical pipe connection part and can connect a horizontal pipe;
A piping structure comprising: a sound-absorbing layer that covers the vertical pipe connection portion; and a sound-insulating cover that covers the sound-absorbing layer and whose lateral direction is longer than the lateral direction of the sound-absorbing layer,
The sound insulation cover includes a sound absorption sheet that covers the vertical pipe connection portion, and a sound insulation sheet that covers the sound absorption sheet,
The sound absorbing sheet and the sound insulating sheet are provided with a fitting opening through which the horizontal pipe connection portion is inserted,
Both ends of the sound insulating sheet in the lateral direction are connected to each other in the radial direction at a portion of the side surface of the vertical pipe connection part where the horizontal pipe connection part does not protrude when viewed from the axial direction of the vertical pipe connection part. are connected to each other in a superimposed state,
The lower part of the vertical pipe connection part is buried in the floor slab of the building structure,
The lower end of the sound insulation cover is disposed between the upper surface and the lower surface of the floor slab,
A piping structure in which a thermally expandable sheet is affixed to an outer circumferential surface of the collective joint and of the vertical pipe connecting portion which is located below the horizontal pipe connecting portion and is buried in the floor slab.

a collective joint having a vertical pipe connection part that can be connected to a vertical pipe; and a horizontal pipe connection part that protrudes from a side surface of the vertical pipe connection part and can connect a horizontal pipe;
It has a sound absorbing layer that is a sheet-like felt that covers the vertical pipe connection portion, and a sound insulating layer that covers the sound absorbing layer and is longer in the horizontal direction than the horizontal direction of the sound absorbing layer, and the both ends in the horizontal direction are opposite to each other. and sound insulating covers connected to each other in a radially overlapping state at a portion where the horizontal pipe connection part does not protrude when viewed from the axial direction of the vertical pipe connection part. hand,
The collective joint is embedded in a floor slab of a building structure and has a connecting pipe section connected below the vertical pipe connecting section, and a connecting pipe section located below the floor slab and connected below the connecting pipe section. a lower connecting pipe having an inclined pipe part whose diameter decreases as it goes downward, and a lower pipe part connected to a lower end of the inclined pipe part;
The sound insulation cover is provided with a fitting opening through which the horizontal pipe connection part is inserted,
The lower end of the sound insulation cover is located between the upper surface and the lower surface of the floor slab, below the lower end of the horizontal pipe connection part, and above the upper end of the lower connection pipe,
A piping structure in which at least a portion of the collective joint buried in the floor slab is a thermal expansion tube.

a collective joint having a vertical pipe connection part that can be connected to a vertical pipe; and a horizontal pipe connection part that protrudes from a side surface of the vertical pipe connection part and can connect a horizontal pipe;
a sound absorbing layer that covers the vertical pipe connecting portion; and a sound insulating layer that covers the sound absorbing layer and is longer in the horizontal direction than the horizontal direction of the sound absorbing layer, and both ends of the vertical pipe connecting portion A piping structure comprising: sound insulating covers connected to each other in a radially overlapping state at a portion where the horizontal pipe connection portion does not protrude when viewed from the axial direction of the piping structure,
The collective joint is embedded in a floor slab of a building structure and has a connecting pipe section connected below the vertical pipe connecting section, and a connecting pipe section located below the floor slab and connected below the connecting pipe section. a lower connecting pipe having an inclined pipe part whose diameter decreases as it goes downward, and a lower pipe part connected to a lower end of the inclined pipe part;
The sound insulation cover is provided with a fitting opening through which the horizontal pipe connection part is inserted,
The lower end of the sound insulation cover is located between the upper surface and the lower surface of the floor slab, below the lower end of the horizontal pipe connection part, and above the upper end of the lower connection pipe,
A piping structure in which a thermally expandable sheet is affixed to an outer circumferential surface of the collective joint and of the vertical pipe connecting portion which is located below the horizontal pipe connecting portion and is buried in the floor slab.