JP6147690B2

JP6147690B2 - Drainage pipe fitting

Info

Publication number: JP6147690B2
Application number: JP2014053490A
Authority: JP
Inventors: 小島　誠造; 誠造小島; 加古　洋三; 洋三加古
Original assignee: 株式会社小島製作所
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2017-06-14
Anticipated expiration: 2032-09-19
Also published as: JP2014134098A

Description

本発明は、建物の上階と下階とを仕切る床スラブを貫通して各階に設置されており、上階の排水管と下階の排水管とを水密な状態で連通させる排水管継手に関する。 The present invention relates to a drainage pipe joint that is installed on each floor through a floor slab that partitions the upper floor and lower floor of a building, and that allows the upper floor drain pipe and the lower floor drain pipe to communicate in a watertight state. .

上記した排水管継手に関する技術が特許文献１に記載されている。特許文献１に記載された排水管継手１００は、鋳鉄製の継手であり、図１０に示すように、胴部１０２の上端位置に上部受け口１０３、胴部１０２の上部側面に横枝管受け口１０４が形成されている。そして、横枝管受け口１０４よりも下側に位置する胴部１０２が床スラブＣの貫通孔ＣＨに通され、モルタルＭによって埋め戻されるようになっている。また、前記床スラブＣの天井面から下方に突出する胴部１０２の下端位置には、下端接続部１０５が形成されている。排水管継手１００の上部受け口１０３には上階の排水立て管１０７（鋳鉄管）が接続され、横枝管受け口１０４には上階の排水横枝管１０８（樹脂管）が接続される。さらに、排水管継手１００の下端接続部１０５には下階の排水立て管１０７（鋳鉄管）が接続されようになっている。これにより、上階の排水立て管１０７、排水横枝管１０８が排水管継手１００を介して下階の排水立て管１０７と連通するようになる。 A technique relating to the drainage pipe joint described above is described in Patent Document 1. The drainage pipe joint 100 described in Patent Document 1 is a cast iron joint. As shown in FIG. 10, as shown in FIG. Is formed. And the trunk | drum 102 located below the horizontal branch pipe receptacle 104 is penetrated by the through-hole CH of the floor slab C, and is backfilled with the mortar M. A lower end connection portion 105 is formed at the lower end position of the body portion 102 that protrudes downward from the ceiling surface of the floor slab C. An upper floor drain stand pipe 107 (cast iron pipe) is connected to the upper receptacle 103 of the drain pipe joint 100, and an upper floor drain side branch pipe 108 (resin pipe) is connected to the lateral branch pipe receptacle 104. Further, a lower drainage stack 107 (cast iron pipe) is connected to the lower end connection portion 105 of the drainage pipe joint 100. As a result, the drainage stack 107 on the upper floor and the drainage branch pipe 108 communicate with the drainage stack 107 on the lower floor via the drainage pipe joint 100.

このように上階と下階との間に連通する排水経路を形成する排水設備は、火災のときには、その排水経路を通じて上階へ延焼するおそれがある。特許文献１に記載された排水設備のように、鋳鉄製の排水管継手１００と鋳鉄製の排水立て管１０７とが用いられている場合、上階と下階との間に連通する排水経路は燃えない。しかしながら、排水横枝管１０８として、硬質塩化ビニル樹脂製等の可燃性樹脂製の管を用いているので、火災により排水横枝管１０８が燃えて横枝管受け口１０４が開放されると、煙や炎が横枝管受け口１０４から排水管継手１００に入り込み、排水立て管１０７を通じて上階へ達するのを防ぐことができなない。そこで、特許文献１に記載された排水管継手１００では、横枝管受け口１０４の内側に円筒状の熱膨張性耐火材１０４ｎが保持されている。ここで使用される熱膨張性耐火材１０４ｎは、熱膨張黒鉛を含有するゴム系材料や樹脂製材料などからなり、温度が２００℃以上になったときに熱膨張してその体積が５〜４０倍に膨張するものである。火災時には、熱膨張性耐火材１０４ｎが加熱されて膨張し、横枝管受け口１０４を閉塞する。それにより、排水管継手１００の内部に煙や炎等が入り込むのが妨げられ、排水立て管１０７を通じて煙や炎が上階へ達し、上階の排水管継手１００に接続された可燃性樹脂製の排水横枝管１０４に延焼するのを防止することができる。 In this way, the drainage facility that forms the drainage path communicating between the upper floor and the lower floor may spread to the upper floor through the drainage path in the event of a fire. When the drainage pipe joint 100 made of cast iron and the drainage stack 107 made of cast iron are used as in the drainage facility described in Patent Document 1, the drainage path communicating between the upper floor and the lower floor is Nonflammable. However, since a pipe made of a flammable resin such as a hard polyvinyl chloride resin is used as the drain side branch pipe 108, if the drain side branch pipe 108 burns due to a fire and the side branch pipe receptacle 104 is opened, smoke It is impossible to prevent or flame from entering the drainage pipe joint 100 from the side branch pipe receiving port 104 and reaching the upper floor through the drainage stack pipe 107. Therefore, in the drain pipe joint 100 described in Patent Document 1, a cylindrical thermally expandable refractory material 104 n is held inside the side branch pipe receiving port 104. The thermally expandable refractory material 104n used here is made of a rubber-based material or a resin material containing thermally expanded graphite, and when the temperature reaches 200 ° C. or higher, the volume is 5 to 40. It expands twice. In the event of a fire, the thermally expandable refractory material 104n is heated and expands, closing the side branch pipe receiving port 104. This prevents smoke and flames from entering the drainage pipe joint 100, and smoke and flames reach the upper floor through the drainage stack 107 and are made of a combustible resin connected to the drainage pipe joint 100 on the upper floor. It is possible to prevent the fire from spreading to the drainage horizontal branch pipe 104 of the pipe.

特開２００８−２１５０３７号公報JP 2008-215037 A

しかし、上記した排水管継手１００は、鋳鉄製であるため重量が大きく施工時の取扱いに手間が掛かる。さらに、製造コスト的にも不利である。 However, since the drainage pipe joint 100 described above is made of cast iron, it is heavy and takes time to handle during construction. Further, it is disadvantageous in terms of manufacturing cost.

本発明は、上記問題点を解決するためになされたものであり、本発明の技術的課題は、排水管継手の軽量化、低コスト化を図るとともに、鋳鉄製の排水管継手と比較して排水性能が低下しないようにし、且つ、火災時に上階へ煙や炎が侵入するのを遮ることを可能にすることである。 The present invention has been made to solve the above problems, and the technical problem of the present invention is to reduce the weight and cost of the drainage pipe joint and to compare it with the drainage pipe joint made of cast iron. The purpose is to prevent the drainage performance from deteriorating and to prevent smoke and flames from entering the upper floor during a fire.

本発明は、建物の上階と下階とを仕切る床スラブを貫通して各階に設置されており、上階の排水管と下階の排水管とを水密な状態で連通させる排水管継手であって、前記床スラブ上に配置されて、上階の排水管が接続される受け口を備える熱可塑性樹脂製の上胴部と、前記床スラブに埋設される部分で、前記上胴部の下端部に接続される上端接続部と、その床スラブの天井面から下方に突出して、下階の排水管が接続される下端接続部と、前記上端接続部と前記下端接続部との間にて下方に窄まる流路を形成するテーパ部と、を備える熱可塑性樹脂製の下胴部と、前記下胴部の内側に嵌め込まれる構成であり、流下する排水を導くとともに、火災の熱により溶けて前記テーパ部を閉塞する羽根を備える熱可塑性樹脂製の内装部材とを有し、前記内装部材は、外周面が前記下胴部の内周面に嵌合可能に構成された筒状部と、該筒状部に支持された前記羽根と、を備え、前記羽根は、流下する排水の流速を減速させつつ前記排水を旋回させる減速羽根と、前記排水を旋回させる旋回羽根とが、前記下胴部の内周面の対向する位置に沿って配されており、前記下胴部の内周面には、軸方向に延びる位置決め溝が形成されており、前記内装部材の筒状部の外周面には、前記下胴部の位置決め溝と嵌合可能な嵌合リブが形成されており、前記上胴部の下端部の外周面には、前記内装部材の嵌合リブが嵌合した状態の前記下胴部の位置決め溝に対して嵌合可能に構成された突起が形成されている。 The present invention is a drainage pipe joint that is installed on each floor through a floor slab that partitions the upper floor and lower floor of a building, and that allows the upper floor drain pipe and the lower floor drain pipe to communicate in a watertight state. A thermoplastic resin upper body portion provided on the floor slab and provided with a receiving port to which a drain pipe on the upper floor is connected; and a lower end of the upper body portion in a portion embedded in the floor slab. Between the upper end connection portion connected to the upper end connection portion, the lower end connection portion protruding downward from the ceiling surface of the floor slab, and connected to the drain pipe on the lower floor, and the upper end connection portion and the lower end connection portion A lower body portion made of a thermoplastic resin having a tapered portion that forms a flow path that narrows downward, and is fitted inside the lower body portion, guides drainage water that flows down, and melts due to the heat of the fire and a interior member of thermoplastic resin comprising a vane that closes the tapered portion Te, before The interior member includes a cylindrical portion whose outer peripheral surface is configured to be fitted to an inner peripheral surface of the lower body portion, and the blade supported by the cylindrical portion, and the blade is a drainage that flows down. A speed reducing blade that swirls the drainage while decelerating a flow rate of the water and a swirl vane that swirls the drainage are disposed along opposing positions on the inner peripheral surface of the lower body, A positioning groove extending in the axial direction is formed on the inner peripheral surface, and a fitting rib that can be fitted to the positioning groove of the lower body portion is formed on the outer peripheral surface of the cylindrical portion of the interior member. And a protrusion configured to be fitted to the positioning groove of the lower trunk portion in a state in which the fitting rib of the interior member is fitted is formed on the outer peripheral surface of the lower end portion of the upper trunk portion. Yes .

本発明によると、排水管継手を構成する上胴部と下胴部と内装部材とが共に樹脂製であるため、従来のように、排水管継手を鋳鉄により製造する場合と比較して、軽量化、低コスト化を図れるようになる。さらに、排水管継手を上胴部と下胴部と内装部材とに分けて形成することで、排水管継手を射出成形する際の成形精度を高くできる。このため、鋳鉄製の排水管継手と比較して前記排水管継手の排水性能が低下することがない。また、流下する排水を導く羽根が火災の熱により溶けてテーパ部を閉塞するため、火災時に上階へ煙や炎が侵入するのを遮ることができる。
また、下胴部の内周面に対して内装部材の筒状部の外周面を接着、あるいは融着等により容易に固定することができる。さらに、減速羽根と旋回羽根とによって、排水性能を確保することができ、且つこれらの羽根が対向する位置に設けられていることで、火災の熱により溶けてテーパ部を閉塞しやすい。
また、内装部材の嵌合リブと下胴部の位置決め溝と上胴部の突起とにより、下胴部に対して内装部材と上胴部とを一定の位置関係で位置決めできるようになる。 According to the present invention, since the upper body part, the lower body part, and the interior member that constitute the drainage pipe joint are all made of resin, as compared with the case where the drainage pipe joint is made of cast iron as in the prior art, it is lighter in weight. And cost reduction. Furthermore, by forming the drainage pipe joint into the upper body part, the lower body part, and the interior member, it is possible to increase the molding accuracy when the drainage pipe joint is injection-molded. For this reason, the drainage performance of the drainage pipe joint does not deteriorate as compared with a drainage pipe joint made of cast iron. Moreover, since the blade | wing which guides the waste_water | drain which flows down melts | dissolves with the heat of a fire, and a taper part is obstruct | occluded, it can block | prevent that smoke and a flame invade to an upper floor at the time of a fire.
Moreover, the outer peripheral surface of the cylindrical part of the interior member can be easily fixed to the inner peripheral surface of the lower body part by bonding or fusion. Furthermore, drainage performance can be ensured by the speed reduction blades and the swirl blades, and since these blades are provided at positions facing each other, the taper portion is easily closed by melting by the heat of the fire.
Further, the fitting member of the interior member, the positioning groove of the lower body portion, and the protrusion of the upper body portion can position the interior member and the upper body portion with respect to the lower body portion in a fixed positional relationship.

また、前記上胴部には、排水立て管が差し込まれる上部受け口と、排水横枝管が差し込まれる横枝管受け口とが設けられており、前記上胴部の内壁面には、前記横枝管受け口用の開口の横で上下方向に延びる縦壁であって、排水が前記横枝管受け口用の開口側に逆流しないようにする流入防止壁が形成されているのも好ましい。これにより、流下する排水が横枝管受け口に接続された排水横枝管側に逆流することがない。また、隣の横枝管受け口から流入した排水が別の横枝管受け口側に逆流することもない。 Further, the upper trunk portion is provided with an upper receptacle into which a drainage standpipe is inserted and a lateral branch pipe receptacle into which a drainage horizontal branch pipe is inserted, and an inner wall surface of the upper trunk portion is provided with the lateral branch. It is also preferable that a vertical wall extending in the vertical direction beside the opening for the pipe receiving port and forming an inflow prevention wall for preventing the drainage from flowing back to the opening side for the horizontal branch pipe receiving port. Thereby, the drainage which flows down does not flow backward to the drainage side branch pipe connected to the side branch pipe receptacle. Further, the waste water flowing in from the adjacent side branch pipe receiving port does not flow backward to another side branch pipe receiving side.

また、前記下胴部の下端接続部には、その下端接続部に挿入される下階の排水管の上端面が当接可能に構成されたストッパ部がリング状に形成されており、前記ストッパ部には、樹脂の肉厚寸法を抑えるための肉ぬすみ部が設けられているのも好ましい。これにより、下胴部の下端接続部におけるストッパ部、及びその近傍の成形不良を防止できるようになる。 In addition, the lower end connecting portion of the lower body portion is formed with a ring-shaped stopper portion configured to be able to contact the upper end surface of the lower-floor drain pipe inserted into the lower end connecting portion. It is also preferable that the portion is provided with a thinned portion for suppressing the thickness of the resin. Thereby, the stopper part in the lower end connection part of the lower body part and the molding defect in the vicinity thereof can be prevented.

所定の下胴部に対して複数種類の上胴部が接続可能なように構成されていると、複数種類の排水管継手を容易に準備でき、前記排水管継手を使用可能範囲が広くなる。 When configured so that a plurality of types of upper body parts can be connected to a predetermined lower body part, a plurality of types of drain pipe joints can be easily prepared, and the range in which the drain pipe joints can be used is widened.

本発明の排水管継手を形成する熱可塑性樹脂としては、硬質塩化ビニルが好ましい。 As the thermoplastic resin forming the drainage pipe joint of the present invention, hard vinyl chloride is preferable.

本発明によれば、排水管継手の軽量化、低コスト化を図ることができる。さらに、排水管継手を樹脂により精度良く成形できるため、鋳鉄製の排水管継手と比較して排水性能が低下することがない。また、火災時には管路を閉塞し、上階へ煙や炎が侵入するのを遮ることができる。 According to the present invention, it is possible to reduce the weight and cost of the drainage pipe joint. Furthermore, since the drainage pipe joint can be accurately molded with resin, the drainage performance does not deteriorate as compared with a drainage pipe joint made of cast iron. In the event of a fire, the pipeline can be blocked to prevent smoke and flames from entering the upper floor.

本発明の実施形態１に係る排水管継手を使用した排水設備の側面図である。It is a side view of the drainage equipment using the drainage pipe joint concerning Embodiment 1 of the present invention. 本発明の実施形態１に係る排水管継手の縦断面図である。It is a longitudinal cross-sectional view of the drain pipe joint which concerns on Embodiment 1 of this invention. 図２のIII-III矢視断面図である。FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. 図２のIV-IV矢視断面図である。FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 2. 排水管継手を構成する上胴部の縦断面図である。It is a longitudinal cross-sectional view of the upper trunk part which comprises a drain pipe joint. 排水管継手を構成する下胴部の縦断面図である。It is a longitudinal cross-sectional view of the lower trunk part which comprises a drainage pipe joint. 排水管継手を構成する内装部材の縦断面図（Ａ図）、及び内装部材の側面図（Ａ図のB-B矢視図）（Ｂ図）である。It is the longitudinal cross-sectional view (A figure) of the interior member which comprises a drain pipe coupling, and the side view (BB view of A figure) (B figure) of an interior member. 変更例１に係る排水管継手の上胴部を表す縦断面図である。It is a longitudinal cross-sectional view showing the upper trunk | drum part of the drain pipe joint which concerns on the example 1 of a change. 変更例２に係る排水管継手の上胴部を表す縦断面図である。It is a longitudinal cross-sectional view showing the upper trunk | drum part of the drain pipe joint which concerns on the example 2 of a change. 従来の排水管継手を備える排水設備の一部破断側面図である。It is a partially broken side view of the drainage equipment provided with the conventional drainage pipe joint.

［実施形態１］
以下、図１〜図９に基づいて本発明の実施形態１に係る排水管継手の説明を行なう。本実施形態に係る排水管継手２０は、マンション等の集合住宅やオフィスビル等における排水設備１０に使用される排水管継手である。 [Embodiment 1]
Hereinafter, the drainage pipe joint according to Embodiment 1 of the present invention will be described with reference to FIGS. The drainage pipe joint 20 according to the present embodiment is a drainage pipe joint used for the drainage equipment 10 in an apartment building such as an apartment, an office building, or the like.

＜排水設備１０の概要について＞
排水設備１０は、図１に示すように、集合住宅の上階と下階とを仕切る床スラブＣを貫通して各階に設置されている排水管継手２０と、各階の排水管継手２０を相互につなぐ樹脂製の排水立て管７０と、各階の床上に配管されて各階の排水管継手に接続される樹脂製の排水横枝管（図示省略）とから構成されている。 <About the outline of the drainage facility 10>
As shown in FIG. 1, the drainage facility 10 includes a drainage pipe joint 20 that is installed on each floor through a floor slab C that partitions the upper and lower floors of the apartment building, and a drainage pipe joint 20 on each floor. And a resin drainage branch pipe (not shown) that is piped on the floor of each floor and connected to the drainage pipe joint of each floor.

排水設備１０は、下階の排水管継手２０の上部受け口３２に排水立て管７０の下端挿し口７１ｓを挿入接続した後、その排水立て管７０の上端挿し口７１ｕに上階の排水管継手２０の下端部（小径円筒部４５）を接続するように、下から上に順番に積み上ながら施工する。そして、排水立て管７０の配管後に各階の排水横枝管が各階の排水管継手２０の横枝管受け口３５に挿入接続される。 In the drainage facility 10, after the lower end insertion port 71 s of the drainage stack 70 is inserted and connected to the upper receiving port 32 of the lower floor drainage pipe joint 20, the upper floor drainage pipe joint 20 is connected to the upper end insertion port 71 u of the drainage stack 70. In order to connect the lower end portion (small-diameter cylindrical portion 45), construction is performed while sequentially stacking from bottom to top. After the drainage standpipe 70 is piped, the drainage horizontal branch pipes of each floor are inserted and connected to the horizontal branch pipe receiving port 35 of the drainage pipe joint 20 of each floor.

＜排水管継手２０の概要、及び上胴部３０について＞
前記排水管継手２０は、上階の排水立て管７０及び排水横枝管（図示省略）により導かれた排水を合流させて下階の排水立て管７０に流入させる継手であり、排水立て管７０及び排水横枝管と同様に樹脂により成形されている。排水管継手２０は、図２、及び図５〜図７に示すように、上胴部３０と、下胴部４０と、内装部材５０とから構成されている。 <About the outline of the drain pipe joint 20 and the upper trunk 30>
The drainage pipe joint 20 is a joint that joins the drainage led by the drainage standpipe 70 on the upper floor and the drainage side branch pipe (not shown) to flow into the drainage standpipe 70 on the lower floor. And it is molded with resin in the same way as the drainage horizontal branch pipe. As shown in FIG. 2 and FIGS. 5 to 7, the drain pipe joint 20 includes an upper body part 30, a lower body part 40, and an interior member 50.

排水管継手２０の上胴部３０は、排水管継手２０の上部を構成する部材であり、図１に示すように、床スラブＣ上に配置される。上胴部３０は、図２、図５等に示すように、上端部に形成された上部受け口３２と上胴部本体３３とから構成されている。 The upper trunk portion 30 of the drainage pipe joint 20 is a member constituting the upper part of the drainage pipe joint 20, and is disposed on the floor slab C as shown in FIG. As shown in FIGS. 2, 5, and the like, the upper trunk portion 30 includes an upper receiving port 32 formed at the upper end portion and an upper trunk portion main body 33.

上部受け口３２は、図１に示すように、排水立て管７０の下端挿し口７１ｓが挿入接続される部分であり、図２、図５に示すように、円筒部３２ｅと、その円筒部３２ｅの下端位置で上胴部本体３３との境界位置に設けられた内フランジ部３２ｆとを備えている。そして、上部受け口３２の円筒部３２ｅ内にゴム製のシール材２６が収納されている。シール材２６は、図２に示すように、筒壁部２６１と、その筒壁部２６１の上端内周面側に形成された襞状のシール本体部２６３と、前記筒壁部２６１の下端に形成された内フランジ状の立て管受け部２６５とから構成されている。そして、シール材２６の立て管受け部２６５が上部受け口３２の内フランジ部３２ｆによって下方から支えられている。 As shown in FIG. 1, the upper receiving port 32 is a portion to which the lower end insertion port 71s of the drainage stack 70 is inserted and connected. As shown in FIGS. 2 and 5, the cylindrical portion 32e and the cylindrical portion 32e An inner flange portion 32f provided at a boundary position with the upper body portion main body 33 at the lower end position is provided. A rubber sealing material 26 is accommodated in the cylindrical portion 32 e of the upper receiving port 32. As shown in FIG. 2, the sealing material 26 includes a cylindrical wall portion 261, a bowl-shaped seal main body portion 263 formed on the inner peripheral surface of the upper end of the cylindrical wall portion 261, and a lower end of the cylindrical wall portion 261. The inner flange-shaped standing tube receiving portion 265 is formed. The vertical pipe receiving portion 265 of the sealing material 26 is supported from below by the inner flange portion 32 f of the upper receiving port 32.

これにより、排水立て管７０の下端挿し口７１ｓはシール材２６の立て管受け部２６５に当接するまで、上部受け口３２内に挿入可能となる。そして、この状態で、シール材２６のシール本体部２６３が排水立て管７０の下端挿し口７１ｓによって半径方向外側に押圧されて弾性変形し、上部受け口３２と排水立て管７０との間がシールされる。さらに、排水立て管７０の温度による伸縮はシール材２６の立て管受け部２６５等により吸収されるようになる。上部受け口３２の円筒部３２ｅには、シール材２６が収納された状態で、そのシール材２６の筒壁部２６１の上端面を押さえるシール材保持リング２４が被せられて接着等により固定される。 Thereby, the lower end insertion port 71 s of the drainage stack 70 can be inserted into the upper receiving port 32 until it comes into contact with the standpipe receiving portion 265 of the sealing material 26. In this state, the seal body portion 263 of the seal material 26 is pressed radially outward by the lower end insertion port 71s of the drainage stack 70 and elastically deforms, and the space between the upper receiving port 32 and the drainage stack 70 is sealed. The Further, the expansion and contraction due to the temperature of the drainage stack 70 is absorbed by the standpipe receiving portion 265 of the sealing material 26 and the like. The cylindrical portion 32e of the upper receiving port 32 is covered with a sealing material holding ring 24 that holds the upper end surface of the cylindrical wall portion 261 of the sealing material 26 in a state where the sealing material 26 is accommodated, and is fixed by adhesion or the like.

上胴部３０の上胴部本体３３の側面には、図５等に示すように、排水横枝管（図示省略）が挿入接続される複数の横枝管受け口３５が横向きに９０°間隔で形成されている。横枝管受け口３５は、前記上部受け口３２と径寸法が異なるだけで、基本的には等しい構造である。即ち、横枝管受け口３５は、円筒部３５ｅと、その円筒部３５ｅの基端位置の形成された内フランジ部３５ｆとから構成されている。横枝管受け口３５には、排水横枝管が直接的に挿入されて接着剤等により固定されるようになっている。 On the side surface of the upper body portion 33 of the upper body portion 30, as shown in FIG. 5 and the like, a plurality of side branch pipe receiving ports 35 into which drainage side branch pipes (not shown) are inserted and connected are laterally spaced at 90 ° intervals. Is formed. The lateral branch pipe receiving port 35 has basically the same structure as the upper receiving port 32 except for the diameter dimension. In other words, the horizontal branch pipe receiving port 35 includes a cylindrical portion 35e and an inner flange portion 35f formed at the base end position of the cylindrical portion 35e. A drainage horizontal branch pipe is directly inserted into the horizontal branch pipe receiving port 35 and is fixed by an adhesive or the like.

さらに、上胴部本体３３の内壁面には、図２、図５に示すように、横枝管受け口３５の開口３５ｈを挟んで両側に縦方向に延びる流入防止壁３７が形成されている。流入防止壁３７は、排水立て管７０を介して上部受け口３２から流入した旋回排水が横枝管受け口３５の開口３５ｈ側に逆流したり、隣の横枝管受け口３５から流入した排水が別の横枝管受け口３５の開口３５ｈ側（排水横枝管側）に逆流するのを防止するための壁であり、図３に示すように、断面山形をした突条状に形成されている。 Further, as shown in FIGS. 2 and 5, an inflow prevention wall 37 extending in the vertical direction is formed on both sides of the opening 35 h of the side branch pipe receiving port 35 on the inner wall surface of the upper trunk body 33. The inflow prevention wall 37 allows the swirling wastewater that flows in from the upper receiving port 32 through the drainage stack 70 to flow back to the opening 35h side of the side branch tube receiving port 35, or the wastewater that flows in from the adjacent side branch tube receiving port 35 has another flow. 3 is a wall for preventing backflow to the opening 35h side (drainage horizontal branch pipe side) of the horizontal branch pipe receiving port 35, and is formed in a ridge shape having a mountain-shaped cross section as shown in FIG.

また、上胴部本体３３の下端部３３ｄは、図２に示すように、下胴部４０の大径円筒部４１に嵌め込まれるように円筒形に形成されている。さらに、上胴部本体３３の下端部３３ｄの外周面には、円周方向における所定位置に位置決め用の突起３３ｔが１８０°間隔で形成されている。突起３３ｔは断面角形をした扁平な突条であり、後記する下胴部４０の位置決め溝４７に嵌合可能なように構成されている。ここで、１８０°間隔で形成された一対の突起３３ｔは、異なる幅寸法に設定されている。 Moreover, the lower end part 33d of the upper trunk | drum main part 33 is formed in the cylindrical shape so that it may fit in the large diameter cylindrical part 41 of the lower trunk | drum 40, as shown in FIG. Furthermore, positioning projections 33t are formed at predetermined positions in the circumferential direction on the outer peripheral surface of the lower end portion 33d of the upper trunk body 33 at intervals of 180 °. The protrusion 33t is a flat protrusion having a square cross section, and is configured to be fitted into a positioning groove 47 of the lower body portion 40 described later. Here, the pair of protrusions 33t formed at intervals of 180 ° are set to different width dimensions.

＜排水管継手２０の下胴部４０について＞
排水管継手２０の下胴部４０は、排水管継手２０の中央部から下部を構成する部材であり、図１に示すように、その下端部（小径円筒部４５）が下方に突出するように床スラブＣに埋設される。下胴部４０は、上から順番に大径円筒部４１とテーパ部４３と小径円筒部４５とを備えており、前記大径円筒部４１、テーパ部４３、小径円筒部４５が同軸に形成されている。 <About the lower trunk 40 of the drainage pipe joint 20>
The lower body portion 40 of the drainage pipe joint 20 is a member that forms a lower part from the center part of the drainage pipe joint 20, and as shown in FIG. 1, the lower end part (small diameter cylindrical part 45) projects downward. Embedded in floor slab C. The lower body portion 40 includes a large diameter cylindrical portion 41, a tapered portion 43, and a small diameter cylindrical portion 45 in order from the top, and the large diameter cylindrical portion 41, the tapered portion 43, and the small diameter cylindrical portion 45 are formed coaxially. ing.

大径円筒部４１は、その内径寸法が上胴部本体３３の下端部３３ｄの外径寸法とほぼ等しくなるように設定されている。また、大径円筒部４１の軸方向の長さ寸法が、上胴部本体３３の軸方向の長さ寸法よりも若干小さな値に設定されている。 The large-diameter cylindrical portion 41 is set so that its inner diameter is substantially equal to the outer diameter of the lower end 33 d of the upper body portion 33. Further, the length dimension in the axial direction of the large-diameter cylindrical portion 41 is set to a value slightly smaller than the length dimension in the axial direction of the upper body portion main body 33.

テーパ部４３は、肉厚寸法を変化させずに下側が小径になるように管体を徐々に絞った部分であり、軸方向の長さ寸法が上胴部本体３３の軸方向の長さ寸法とほぼ等しく設定されている。 The tapered portion 43 is a portion in which the tubular body is gradually narrowed so that the lower side has a small diameter without changing the thickness dimension, and the axial length dimension is the axial length dimension of the upper trunk body 33. Is set to be approximately equal.

小径円筒部４５は、図１に示すように、下階の排水立て管７０の上端挿し口７１ｕが挿入接続される部分であり、床スラブＣの天井面から一定寸法だけ突出するように構成されている。小径円筒部４５の内側には、図２に示すように、排水立て管７０の上端挿し口７１ｕの上端面が当接するストッパ部４５ｓが前記テーパ部４３の延長線上に形成されている。そして、ストッパ部４５ｓの周囲に、図４に示すように、そのストッパ部４５ｓ、及びその近傍における肉厚寸法の増加を抑える肉ぬすみ部４５ｋが形成されている。 As shown in FIG. 1, the small-diameter cylindrical portion 45 is a portion into which the upper end insertion port 71u of the drainage stack 70 on the lower floor is inserted and connected, and is configured to protrude from the ceiling surface of the floor slab C by a certain dimension. ing. As shown in FIG. 2, a stopper portion 45 s with which the upper end surface of the upper end insertion port 71 u of the drainage stack 70 abuts is formed on the extended line of the tapered portion 43 inside the small diameter cylindrical portion 45. Further, as shown in FIG. 4, a stopper portion 45 s and a thinned portion 45 k that suppresses an increase in thickness in the vicinity thereof are formed around the stopper portion 45 s.

また、下胴部４０の内壁面には、図６に示すように、円周方向おける所定位置に軸方向に延びる位置決め溝４７が１８０°間隔で形成されている。位置決め溝４７は、大径円筒部４１の上端からテーパ部４３の途中位置まで形成された断面角形の浅い溝であり、下方に行くにつれて幅狭となるように形成されている。さらに、１８０°間隔で形成された一対の位置決め溝４７は、異なる幅寸法に設定されており、各々の位置決め溝４７の幅寸法が上胴部本体３３の対応する突起３３ｔの幅寸法にほぼ等しくなるように設定されている。 Further, as shown in FIG. 6, positioning grooves 47 extending in the axial direction are formed at predetermined positions in the circumferential direction on the inner wall surface of the lower body portion 40 at intervals of 180 °. The positioning groove 47 is a shallow groove having a square cross section formed from the upper end of the large-diameter cylindrical portion 41 to the middle position of the tapered portion 43, and is formed so as to become narrower as it goes downward. Further, the pair of positioning grooves 47 formed at intervals of 180 ° are set to have different width dimensions, and the width dimension of each positioning groove 47 is substantially equal to the width dimension of the corresponding projection 33 t of the upper trunk body 33. It is set to be.

ここで、位置決め溝４７を断面角形の溝状に形成し、突起３３ｔを断面角形の突条状に形成する例を示したが、位置決め溝４７を開口側が狭い溝状に形成し、突起３３ｔを先端側が広い突条状に形成して、位置決め溝４７と突起３３ｔとが半径方向に係合する構成とすることも可能である。 Here, although the example in which the positioning groove 47 is formed in a groove shape having a square cross section and the protrusion 33t is formed in a protrusion shape having a square cross section has been shown, the positioning groove 47 is formed in a groove shape having a narrow opening side, and the protrusion 33t is formed. It is also possible to have a configuration in which the distal end side is formed in a wide ridge shape and the positioning groove 47 and the projection 33t are engaged in the radial direction.

即ち、下胴部４０の大径円筒部４１が本発明における下胴部の上端接続部に相当し、下胴部４０の小径円筒部４５が本発明における下胴部の下端接続部に相当する。 That is, the large diameter cylindrical portion 41 of the lower body portion 40 corresponds to the upper end connection portion of the lower body portion in the present invention, and the small diameter cylindrical portion 45 of the lower body portion 40 corresponds to the lower end connection portion of the lower body portion in the present invention. .

＜排水管継手２０の内装部材５０について＞
排水管継手２０の内装部材５０は、図２に示すように、下胴部４０の内側に嵌め込まれてその下胴部４０に固定される部材であり、流下する排水を減速させて旋回させられるように構成されている。内装部材５０は、図７に示すように、筒状部５２と、その筒状部５２の下側で位相を１８０°ずらした状態で形成された減速ガイド５４と、旋回ガイド５６とから構成されている。 <About the interior member 50 of the drain pipe joint 20>
As shown in FIG. 2, the interior member 50 of the drain pipe joint 20 is a member that is fitted inside the lower body portion 40 and is fixed to the lower body portion 40, and is swung by decelerating the drained water flowing down. It is configured as follows. As shown in FIG. 7, the interior member 50 includes a cylindrical portion 52, a deceleration guide 54 formed in a state where the phase is shifted by 180 ° below the cylindrical portion 52, and a turning guide 56. ing.

内装部材５０の筒状部５２は、図７（Ａ）（Ｂ）に示すように、下胴部４０の大径円筒部４１に嵌め込まれる筒本体５２ｍと、減速ガイド５４を支持する減速ガイド支持部５２ｘと、旋回ガイド５６を支持する旋回ガイド支持部５２ｙとから構成されている。即ち、筒状部５２の筒本体５２ｍの外径寸法は、上胴部３０（上胴部本体３３）の下端部３３ｄの外径寸法と等しい値で、下胴部４０の大径円筒部４１の内径寸法とほぼ等しく設定されている。 As shown in FIGS. 7A and 7B, the cylindrical portion 52 of the interior member 50 has a cylinder main body 52m fitted into the large-diameter cylindrical portion 41 of the lower trunk portion 40 and a reduction guide support that supports the reduction guide 54. It is comprised from the part 52x and the turning guide support part 52y which supports the turning guide 56. FIG. That is, the outer diameter size of the cylindrical body 52m of the cylindrical portion 52 is equal to the outer diameter size of the lower end portion 33d of the upper body portion 30 (upper body portion main body 33), and the large diameter cylindrical portion 41 of the lower body portion 40. It is set to be almost equal to the inner diameter dimension.

そして、筒状部５２の筒本体５２ｍの外周面には、下胴部４０の位置決め溝４７と嵌合可能な嵌合リブ５２ｔが位相を１８０°ずらした状態で形成されている。嵌合リブ５２ｔは、下胴部４０の位置決め溝４７と等しい断面形状（断面角形）をした扁平突条であり、下方に行くにつれて幅狭となるように形成されている。さらに、１８０°間隔で形成された一対の嵌合リブ５２ｔは、異なる幅寸法に設定されており、各々の嵌合リブ５２ｔの幅寸法が下胴部４０の対応する位置決め溝４７の幅寸法にほぼ等しくなるように設定されている。ここで、嵌合リブ５２ｔを断面角形に形成する例を示したが、位置決め溝４７を開口側が狭い溝状に形成した場合には、嵌合リブ５２ｔの断面形状を位置決め溝４７を形状に合わせるようにする。 And the fitting rib 52t which can be fitted with the positioning groove 47 of the lower trunk | drum 40 is formed in the outer peripheral surface of the cylinder main body 52m of the cylindrical part 52 in the state which shifted the phase by 180 degrees. The fitting rib 52t is a flat protrusion having a cross-sectional shape (cross-sectional square shape) equal to the positioning groove 47 of the lower body portion 40, and is formed so as to become narrower as it goes downward. Further, the pair of fitting ribs 52t formed at intervals of 180 ° are set to different width dimensions, and the width dimension of each fitting rib 52t is set to the width dimension of the corresponding positioning groove 47 of the lower body portion 40. It is set to be almost equal. Here, an example in which the fitting rib 52t is formed in a square cross section has been shown. However, when the positioning groove 47 is formed in a narrow groove shape on the opening side, the cross sectional shape of the fitting rib 52t is matched to the shape of the positioning groove 47. Like that.

上記構成により、筒本体５２ｍの嵌合リブ５２ｔが対応する下胴部４０の位置決め溝４７と嵌合し、その筒本体５２ｍの外周面が下胴部４０の内周面と嵌合した状態で、内装部材５０は下胴部４０に対して円周方向、上下方向に位置決めされるようになる。 With the above configuration, the fitting rib 52t of the cylinder main body 52m is fitted into the corresponding positioning groove 47 of the lower barrel 40, and the outer peripheral surface of the cylinder main body 52m is fitted to the inner peripheral surface of the lower barrel 40. The interior member 50 is positioned in the circumferential direction and the vertical direction with respect to the lower body portion 40.

減速ガイド５４と旋回ガイド５６は、下胴部４０の大径円筒部４１とテーパ部４３とに跨って、床スラブＣに埋まった位置に配置される。図３に示すように、減速ガイド５４と旋回ガイド５６は、それぞれ下胴部４０の内方に張り出し、排水設備１０の通常使用時には、流下する排水を減速させて旋回させることができるように設けられている。且つ、この減速ガイド５４と旋回ガイド５６は、火災時には、火災の熱により溶けて下方に窄まる流路を形成するテーパ部４３に詰まり、炭化して下胴部４０の管路を閉塞することができるように設けられている。 The deceleration guide 54 and the turning guide 56 are disposed at a position buried in the floor slab C across the large-diameter cylindrical portion 41 and the tapered portion 43 of the lower body portion 40. As shown in FIG. 3, the deceleration guide 54 and the turning guide 56 are provided so as to project inward of the lower body portion 40 so that the drained water can be decelerated and swiveled during normal use of the drainage facility 10. It has been. In addition, in the event of a fire, the deceleration guide 54 and the turning guide 56 are clogged with a taper portion 43 that forms a flow path that melts and contracts downward due to the heat of the fire, and carbonizes to block the conduit of the lower body portion 40. It is provided so that you can.

旋回ガイド５６は、図３の平面図に示すように、扁平半円形をした羽根状部材であり、流下する排水をさほど減速させずに旋回させられるように構成されている。このため、旋回ガイド５６は、羽根の面積が減速ガイド５４と比較して小さく、傾斜角度が、図７（Ａ）に示すように、減速ガイド５４より大きくなるように設定されている。また、旋回ガイド５６の下面側には、その旋回ガイド５６を補強するための補強桁５６ｒが旋回ガイド５６の幅方向に延びるように形成されている。 As shown in the plan view of FIG. 3, the swivel guide 56 is a flat semicircular blade-like member, and is configured to be swirled without slowing down the drained water. For this reason, the turning guide 56 is set so that the area of the blade is smaller than that of the deceleration guide 54 and the inclination angle is larger than that of the deceleration guide 54 as shown in FIG. Further, a reinforcing beam 56 r for reinforcing the turning guide 56 is formed on the lower surface side of the turning guide 56 so as to extend in the width direction of the turning guide 56.

減速ガイド５４は、旋回ガイド５６と同様に扁平半円形をした羽根状部材であり、流下する排水を主に減速させつつ、旋回させられるように構成されている。このため、減速ガイド５４は、旋回ガイド５６と比較して羽根の面積が大きく、傾斜角度が旋回ガイド５６より小さくなるように設定されている。また、減速ガイド５４の下面側には、同様にその減速ガイド５４を補強するための補強桁５４ｒが減速ガイド５４の幅方向に延びるように形成されている。 The deceleration guide 54 is a flat semicircular blade-like member similar to the turning guide 56, and is configured to be turned while mainly decelerating the drained water flowing down. For this reason, the deceleration guide 54 is set so that the blade area is larger than the turning guide 56 and the inclination angle is smaller than that of the turning guide 56. Similarly, on the lower surface side of the speed reduction guide 54, a reinforcing beam 54r for reinforcing the speed reduction guide 54 is formed so as to extend in the width direction of the speed reduction guide 54.

前記減速ガイド５４が本発明の減速羽根に相当し、旋回ガイド５６が本発明の旋回羽根に相当する。 The deceleration guide 54 corresponds to the deceleration blade of the present invention, and the turning guide 56 corresponds to the turning blade of the present invention.

＜排水管継手２０の組立について＞
次に、排水管継手２０の成形、及び組立について簡単に説明する。 <Assembly of drain pipe joint 20>
Next, the forming and assembly of the drain pipe joint 20 will be briefly described.

前記排水管継手２０を構成する上胴部３０、下胴部４０、内装部材５０、及びシール材保持リング２４は、射出成形機により樹脂を成形型内に圧入することにより所定の形状に成形される。ここで、排水管継手２０の樹脂材料としては、熱可塑性樹脂である硬質塩化ビニルが好適に使用される。 The upper body part 30, the lower body part 40, the interior member 50, and the sealing material holding ring 24 constituting the drainage pipe joint 20 are molded into a predetermined shape by press-fitting resin into a molding die by an injection molding machine. The Here, as the resin material of the drain pipe joint 20, hard vinyl chloride which is a thermoplastic resin is preferably used.

排水管継手２０の組立では、先ず、内装部材５０を下胴部４０に固定する。即ち、内装部材５０の嵌合リブ５２ｔを対応する下胴部４０の位置決め溝４７に嵌合させた状態で、その内装部材５０を下胴部４０の内側に嵌め込んで、接着剤等により内装部材５０を下胴部４０に固定する。 In assembling the drain pipe joint 20, first, the interior member 50 is fixed to the lower body portion 40. That is, with the fitting rib 52t of the interior member 50 fitted in the positioning groove 47 of the corresponding lower body portion 40, the interior member 50 is fitted inside the lower body portion 40, and the interior is made with an adhesive or the like. The member 50 is fixed to the lower body portion 40.

次に、上胴部３０の上胴部本体３３の突起３３ｔを対応する下胴部４０の位置決め溝４７に嵌合させつつ、その上胴部本体３３の下端部３３ｄを下胴部４０の大径円筒部４１に挿入し、接着剤等により上胴部３０を下胴部４０に固定する。このとき、上胴部３０の上胴部本体３３の下端部３３ｄは、図２に示すように、内装部材５０の筒状部５２に当接するまで下胴部４０の大径円筒部４１に挿入される。この状態で、内装部材５０と上胴部３０とを下胴部４０に対して一定の位置関係で位置決めできるようになる。 Next, the projection 33 t of the upper body part 33 of the upper body part 30 is fitted into the positioning groove 47 of the corresponding lower body part 40, and the lower end part 33 d of the upper body part 33 is made larger than the lower body part 40. It inserts in the diameter cylindrical part 41, and fixes the upper trunk | drum 30 to the lower trunk | drum 40 with an adhesive agent etc. At this time, the lower end portion 33d of the upper body portion 33 of the upper body portion 30 is inserted into the large-diameter cylindrical portion 41 of the lower body portion 40 until it comes into contact with the cylindrical portion 52 of the interior member 50, as shown in FIG. Is done. In this state, the interior member 50 and the upper trunk portion 30 can be positioned with a certain positional relationship with respect to the lower trunk portion 40.

次に、上胴部３０の上部受け口３２にシール材２６を収納し、その上部受け口３２の上端部にシール材保持リング２４を被せて、接着剤等によりシール材保持リング２４を上部受け口３２に固定する。この状態で、排水管継手２０の組立が完了する。ここで、上胴部３０の上部受け口３２にシール材保持リング２４を固定した後で、シール材２６を上胴部３０の上部受け口３２に嵌め込むことも可能である。また、シール材２６及びシール材保持リング２４を上部受け口３２に装着した後、上胴部３０を下胴部４０に固定することも可能である。即ち、内装部材５０の嵌合リブ５２ｔと下胴部４０の位置決め溝４７とが本発明における下胴部と内装部材とを相対的に位置決めする凹凸に相当し、上胴部３０の上胴部本体３３の突起３３ｔと下胴部４０の位置決め溝４７とが本発明における上胴部と下胴部とを相対的に位置決めする凹凸に相当する。 Next, the sealing material 26 is accommodated in the upper receiving port 32 of the upper body 30, and the sealing material holding ring 24 is put on the upper end portion of the upper receiving port 32, and the sealing material holding ring 24 is attached to the upper receiving port 32 by an adhesive or the like. Fix it. In this state, the assembly of the drain pipe joint 20 is completed. Here, after the sealing material holding ring 24 is fixed to the upper receiving port 32 of the upper body portion 30, the sealing material 26 can be fitted into the upper receiving port 32 of the upper body portion 30. It is also possible to fix the upper body part 30 to the lower body part 40 after the sealing material 26 and the sealing material holding ring 24 are attached to the upper receiving port 32. That is, the fitting rib 52t of the interior member 50 and the positioning groove 47 of the lower body part 40 correspond to the unevenness for relatively positioning the lower body part and the interior member in the present invention, and the upper body part of the upper body part 30. The protrusion 33t of the main body 33 and the positioning groove 47 of the lower body portion 40 correspond to the unevenness for relatively positioning the upper body portion and the lower body portion in the present invention.

＜前記排水管継手２０を使用した排水設備１０の組立について＞
次に、前記排水管継手２０を使用した排水設備１０の組立について簡単に説明する。ここで、下階の排水管継手２０は既に設置されているものとして以下の説明を行う。 <Assembly of drainage facility 10 using drainage pipe joint 20>
Next, the assembly of the drainage facility 10 using the drainage pipe joint 20 will be briefly described. Here, the following description will be given on the assumption that the drainage pipe joint 20 on the lower floor is already installed.

先ず、下階の排水立て管７０の下端挿し口７１ｓを下階の排水管継手２０の上部受け口３２に挿入接続する。次に、上階の排水管継手２０の下胴部４０を上階の床スラブＣの貫通孔ＣＨに通し、図１に示すように、下階の排水立て管７０の上端挿し口７１ｕに上階の排水管継手２０の小径円筒部４５に外嵌して、接着剤により下階の排水立て管７０と上階の排水管継手２０の小径円筒部４５とを固定する。次に、上階の排水管継手２０の位置決め後、上階の排水管継手２０の上部受け口３２に上階の排水立て管７０の下端挿し口７１ｓを挿入接続する。このように、排水管継手２０と排水立て管７０とを交互に積み上げながら施工が行われる。このとき、図１に示すように、排水立て管７０と排水管継手２０の周囲を耐火・遮音被覆８０で覆うことで、火災時の延焼を抑制できるとともに、排水の流下音の伝播を抑えることができる。ここで、床スラブＣの貫通孔ＣＨは排水管継手２０が挿入された後、埋戻しモルタルＭにより埋め戻される。 First, the lower end insertion port 71s of the drainage stack 70 on the lower floor is inserted and connected to the upper receiving port 32 of the drainage pipe joint 20 on the lower floor. Next, the lower body portion 40 of the drainage pipe joint 20 on the upper floor is passed through the through-hole CH of the floor slab C on the upper floor, and as shown in FIG. It fits in the small diameter cylindrical part 45 of the drainage pipe joint 20 on the floor, and the drainage stack 70 on the lower floor and the small diameter cylindrical part 45 of the drainage pipe joint 20 on the upper floor are fixed by an adhesive. Next, after positioning the drainage pipe joint 20 on the upper floor, the lower end insertion port 71s of the drainage stack 70 on the upper floor is inserted and connected to the upper receiving port 32 of the drainage pipe joint 20 on the upper floor. In this way, the construction is performed while alternately stacking the drain pipe joint 20 and the drain stack 70. At this time, as shown in FIG. 1, by covering the periphery of the drainage stack 70 and the drainage pipe joint 20 with a fireproof / soundproof coating 80, it is possible to suppress the spread of fire during a fire and to suppress the propagation of the downflow sound of the drainage. Can do. Here, the through hole CH of the floor slab C is backfilled with the backfill mortar M after the drainage pipe joint 20 is inserted.

そして、排水立て管７０の配管後に各階の排水横枝管（図示省略）を各階の排水管継手２０の横枝管受け口３５に挿入し、接着剤により排水横枝管を排水管継手２０の横枝管受け口３５に固定する。これにより、上階の排水立て管７０、排水横枝管が排水管継手２０を介して下階の排水立て管７０と水密な状態で連通するようになる。 Then, after the drainage standpipe 70 is piped, a drainage horizontal branch pipe (not shown) on each floor is inserted into the horizontal branch pipe receiving port 35 of the drainage pipe joint 20 on each floor, and the drainage horizontal branch pipe is placed beside the drainage pipe joint 20 with an adhesive. Fix to the branch pipe receptacle 35. As a result, the upper floor drain stack 70 and the drain side branch pipe communicate with the lower floor drain stack 70 through the drain pipe joint 20 in a watertight state.

＜本実施形態に係る排水管継手２０の長所について＞
本実施形態に係る排水管継手２０によると、排水管継手２０を構成する上胴部３０と下胴部４０と内装部材５０とが共に樹脂製であるため、従来のように、排水管継手を鋳鉄により製造する場合と比較して、軽量化、低コスト化を図れるようになる。 <Advantages of Drainage Pipe Joint 20 According to this Embodiment>
According to the drain pipe joint 20 according to the present embodiment, since the upper body part 30, the lower body part 40, and the interior member 50 constituting the drain pipe joint 20 are all made of resin, Compared with the case of manufacturing with cast iron, it is possible to reduce the weight and cost.

さらに、排水管継手２０を上胴部３０と下胴部４０と内装部材５０とに分けて形成することで、排水管継手２０を射出成形する際の成形精度を高くできる。このため、鋳鉄製の排水管継手と比較して前記排水管継手２０の排水性能が低下することがない。そのうえ、減速ガイド５４と旋回ガイド５６とが、火災時には火災の熱により溶けて下胴部４０の管路を閉塞するため、排水管継手１０を通じて上階へ煙や炎が侵入するのを遮ることができる。このとき、減速ガイド５４と旋回ガイド５６とが床スラブＣに埋まった位置に配置されており、周囲が床スラブＣ（モルタルＭ）で取り囲まれているため、外方に広がることなく下胴部４０の管路内で溶けてテーパ部４３に詰まり、確実に管路が閉塞される。したがって、本実施形態における減速ガイド５４と旋回ガイド５６の容積量（質量）は、火炎の熱によって溶けた際に下胴部４０の管路を実質的に閉塞することのできる容積量で形成されている。ここで実質的に閉塞できるとは火炎の伝播を阻止することができる閉塞状態をいう。 Further, by forming the drain pipe joint 20 into the upper body part 30, the lower body part 40, and the interior member 50, the molding accuracy when the drain pipe joint 20 is injection-molded can be increased. For this reason, the drainage performance of the drainage pipe joint 20 does not deteriorate as compared with a drainage pipe joint made of cast iron. In addition, the deceleration guide 54 and the turning guide 56 are melted by the heat of the fire in the event of a fire and block the pipeline of the lower body 40, so that smoke and flames are prevented from entering the upper floor through the drainage pipe joint 10. Can do. At this time, the deceleration guide 54 and the turning guide 56 are arranged at a position buried in the floor slab C, and the periphery is surrounded by the floor slab C (mortar M), so that the lower body portion does not spread outward. It melts in the 40 pipelines and clogs the tapered portion 43, and the pipeline is reliably closed. Therefore, the volume amount (mass) of the speed reduction guide 54 and the turning guide 56 in the present embodiment is formed with a volume amount that can substantially block the pipe line of the lower body portion 40 when melted by the heat of the flame. ing. Here, “substantially occluded” refers to an occluded state where flame propagation can be prevented.

また、下胴部４０の内周面には内装部材５０の筒状部５２の外周面が嵌合可能に構成されているため、下胴部４０の内周面に対して内装部材５０の筒状部５２の外周面を接着、あるいは融着等により容易に固定することができる。 Moreover, since the outer peripheral surface of the cylindrical part 52 of the interior member 50 can be fitted to the inner peripheral surface of the lower body part 40, the cylinder of the interior member 50 with respect to the inner peripheral surface of the lower body part 40. The outer peripheral surface of the shaped portion 52 can be easily fixed by adhesion or fusion.

また、上胴部３０の上胴部本体３３の突起３３ｔと下胴部４０の位置決め溝４７とが嵌合可能に構成されているため、上胴部３０を下胴部４０に組み付ける際に、両者３０，４０の位置ずれを防止できるようになる。 Further, since the projection 33t of the upper body portion 33 of the upper body portion 30 and the positioning groove 47 of the lower body portion 40 are configured to be fitted, when the upper body portion 30 is assembled to the lower body portion 40, It is possible to prevent the positional deviation between the two 30, 40.

また、内装部材５０の嵌合リブ５２ｔと下胴部４０の位置決め溝４７とが嵌合可能に構成されているため、下胴部４０に内装部材５０を組み付ける際に、両者４０，５０の位置ずれを防止できるようになる。さらに、下胴部４０の内周面には、軸方向に延びる位置決め溝４７が形成されており、内装部材５０の筒状部５２の外周面には、下胴部４０の位置決め溝４７と嵌合可能な嵌合リブ５２ｔが形成されており、上胴部３０の下端部３３ｄの外周面には、内装部材５０の嵌合リブ５２ｔが嵌合した状態の下胴部４０の位置決め溝４７に対して嵌合可能に構成された突起３３ｔが形成されている。これにより、下胴部４０に対して内装部材５０と上胴部３０とを一定の位置関係に位置決めできるようになる。 Further, since the fitting rib 52t of the interior member 50 and the positioning groove 47 of the lower body portion 40 are configured to be able to be fitted, when the interior member 50 is assembled to the lower body portion 40, the positions of both 40 and 50 Deviation can be prevented. Further, a positioning groove 47 extending in the axial direction is formed on the inner peripheral surface of the lower body portion 40, and the positioning groove 47 of the lower body portion 40 is fitted on the outer peripheral surface of the tubular portion 52 of the interior member 50. A mating fitting rib 52t is formed, and a positioning groove 47 of the lower trunk portion 40 in a state where the fitting rib 52t of the interior member 50 is fitted to the outer peripheral surface of the lower end portion 33d of the upper trunk portion 30. On the other hand, a protrusion 33t configured to be fitted is formed. Thereby, the interior member 50 and the upper body part 30 can be positioned in a fixed positional relationship with respect to the lower body part 40.

また、上胴部３０の内壁面には、横枝管受け口用の開口３５ｈの横に上下方向に延びる流入防止壁３７が形成されているため、流下する排水が横枝管受け口３５に接続された排水横枝管側に逆流することがない。また、隣の横枝管受け口３５から流入した排水が別の横枝管受け口３５側に逆流することもない。 In addition, an inflow prevention wall 37 extending in the vertical direction is formed on the inner wall surface of the upper trunk portion 30 next to the opening 35h for the side branch pipe receiving opening, so that the drained water is connected to the side branch pipe receiving opening 35. There is no reverse flow to the drainage side branch pipe side. Further, the waste water flowing in from the adjacent side branch pipe receiving port 35 does not flow backward to another side branch pipe receiving port 35 side.

また、下胴部４０のストッパ部４５ｓには、樹脂の肉厚寸法を抑えるための肉ぬすみ部４５ｋが設けられているため、下胴部４０のストッパ部４５ｓ、及びその近傍の成形不良を防止できるようになる。 In addition, since the stopper portion 45s of the lower body portion 40 is provided with a thinned portion 45k for suppressing the thickness of the resin, molding defects in the stopper portion 45s of the lower body portion 40 and the vicinity thereof are prevented. become able to.

＜変更例＞
ここで、本発明は上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における変更が可能である。例えば、本実施形態に係る排水管継手２０では、胴部を上胴部３０と下胴部４０とによって上下に二分割する例を示した。しかし、上胴部３０と下胴部４０との間に中間胴部を備えるような構成でも可能である。 <Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the drainage pipe joint 20 according to the present embodiment, an example in which the body part is vertically divided into the upper body part 30 and the lower body part 40 is shown. However, a configuration in which an intermediate body portion is provided between the upper body portion 30 and the lower body portion 40 is also possible.

また、本実施形態に係る排水管継手２０では、上胴部３０に横枝管受け口３５を周方向に複数個設ける例を示したが、図８に示すように、横枝管受け口３５を周方向に一個設けるようにすることも可能である。 Further, in the drain pipe joint 20 according to the present embodiment, an example in which a plurality of side branch pipe receiving ports 35 are provided in the circumferential direction in the upper body portion 30 has been shown. However, as shown in FIG. It is also possible to provide one in the direction.

また、本実施形態に係る排水管継手２０では、上部受け口３２を備える上胴部３０を例示したが、図９に示すように、上部受け口３２がない上胴部３０を製造することも可能である。ここで、上部受け口３２がない排水管継手２０は建物の最上階で使用される。 Further, in the drain pipe joint 20 according to the present embodiment, the upper body portion 30 including the upper receiving port 32 is illustrated, but as shown in FIG. 9, the upper body portion 30 without the upper receiving port 32 can be manufactured. is there. Here, the drain pipe joint 20 without the upper receiving port 32 is used on the top floor of the building.

また、本実施形態では、減速ガイド５４と旋回ガイド５６とを備える内装部材５０を例示した。しかし、減速ガイド５４と旋回ガイド５６とをそれぞれ個別の内装部材に設けるようにすることも可能である。さらに、排水管継手の種類によっては、減速ガイド５４、あるいは旋回ガイド５６のいずれかを省略することも可能である。 Moreover, in this embodiment, the interior member 50 provided with the deceleration guide 54 and the turning guide 56 was illustrated. However, it is also possible to provide the deceleration guide 54 and the turning guide 56 in separate interior members. Further, depending on the type of drainage pipe joint, either the speed reduction guide 54 or the turning guide 56 can be omitted.

さらに、本実施形態では、硬質塩化ビニル製の排水管継手２０を例示したが、排水管継手２０を形成する熱可塑性樹脂の種類は使用環境に応じて適宜変更可能である。また、排水管継手２０の上胴部３０と下胴部４０とを透明にすることで、内部の損傷、詰まり等も発見し易くなる。 Furthermore, although the drain pipe joint 20 made from hard vinyl chloride was illustrated in this embodiment, the kind of thermoplastic resin which forms the drain pipe joint 20 can be suitably changed according to use environment. Moreover, it becomes easy to discover an internal damage, clogging, etc. by making the upper trunk | drum 30 and the lower trunk | drum 40 of the drain pipe joint 20 transparent.

２０・・・・・排水管継手
３０・・・・・上胴部
３２・・・・・上部受け口
３３ｄ・・・・下端部
３３ｔ・・・・突起（凸）
３５・・・・・横枝管受け口
３５ｈ・・・・開口（横枝管受け口用の開口）
３７・・・・・流入防止壁
４０・・・・・下胴部
４５ｓ・・・・ストッパ部
４５・・・・・小径円筒部（下端接続部）
４５ｋ・・・・肉ぬすみ部
４７・・・・・位置決め溝（凹）
５０・・・・・内装部材
５２ｔ・・・・嵌合リブ（凸）
５２・・・・・筒状部
５４・・・・・減速ガイド（減速羽根）
５６・・・・・旋回ガイド（減速羽根）
Ｃ・・・・・・床スラブ
20... Drainage pipe joint 30... Upper trunk portion 32... Upper receiving port 33 d... Lower end portion 33 t.
35 ... Horizontal branch pipe receiving port 35h ... Opening (opening for horizontal branch pipe receiving port)
37... Inflow prevention wall 40... Lower barrel portion 45 s... Stopper portion 45... Small diameter cylindrical portion (lower end connection portion)
45k ··· Meat fillet 47 ··· Positioning groove (concave)
50 ... Interior member 52t ... Fitting rib (convex)
52 ... Cylindrical part 54 ... Deceleration guide (Deceleration blade)
56 ... Turning guide (deceleration blade)
C ... floor slab

Claims

It is installed on each floor through the floor slab that partitions the upper floor and lower floor of the building, and is a drainage pipe joint that communicates the drainage pipe on the upper floor and the drainage pipe on the lower floor in a watertight state,
An upper torso made of a thermoplastic resin that is disposed on the floor slab and has a receptacle to which a drain pipe on the upper floor is connected;
A portion embedded in the floor slab, an upper end connection portion connected to the lower end portion of the upper trunk portion, and a lower end connection portion protruding downward from the ceiling surface of the floor slab and connected to a lower-level drain pipe And a taper part that forms a flow path that narrows downward between the upper end connection part and the lower end connection part, and a lower trunk part made of a thermoplastic resin,
It is configured to be fitted inside the lower body part, and has an interior member made of a thermoplastic resin that has a blade that melts due to the heat of a fire and closes the tapered part while guiding drained water flowing down .
The interior member includes a cylindrical portion whose outer peripheral surface is configured to be fitted to an inner peripheral surface of the lower body portion, and the blades supported by the cylindrical portion, and the blades flow down. A speed reducing blade that swirls the drainage while decelerating the flow rate of the drainage, and a swirl vane that swirls the drainage are disposed along opposing positions on the inner peripheral surface of the lower body part,
A positioning groove extending in the axial direction is formed on the inner peripheral surface of the lower body part,
On the outer peripheral surface of the cylindrical portion of the interior member, a fitting rib that can be fitted to the positioning groove of the lower body portion is formed,
On the outer peripheral surface of the lower end portion of the upper body portion, a protrusion configured to be fitted to the positioning groove of the lower body portion in a state where the fitting rib of the interior member is fitted is formed. Drainage pipe joint characterized by

A drainage pipe joint according to claim 1,
The upper trunk portion is provided with an upper receptacle into which a drainage standpipe is inserted, and a horizontal branch pipe receptacle into which a drainage horizontal branch pipe is inserted,
The inner wall surface of the upper trunk portion is a vertical wall extending in the vertical direction next to the opening for the horizontal branch pipe receptacle, and prevents inflow of drainage from flowing back to the opening side for the horizontal branch pipe receptacle. A drainage pipe joint characterized in that a wall is formed .

A drainage pipe joint according to claim 1 or 2,
In the lower end connection part of the lower body part, a stopper part configured to be able to contact the upper end surface of the drain pipe on the lower floor inserted into the lower end connection part is formed in a ring shape,
A drainage pipe joint , wherein the stopper portion is provided with a thinned portion for suppressing the thickness of the resin .

A drainage pipe joint according to any one of claims 1 to 3 ,
A drainage pipe joint , wherein a plurality of types of upper body parts are connectable to a predetermined lower body part .

A drainage pipe joint according to any one of claims 1 to 4 ,
The drain pipe joint , wherein the thermoplastic resin is hard vinyl chloride .