JP6826465B2

JP6826465B2 - Pipe fittings, drainage structure and drainage pipe connection structure

Info

Publication number: JP6826465B2
Application number: JP2017040220A
Authority: JP
Inventors: 賢広瀬
Original assignee: Mirai Kogyo KK
Current assignee: Mirai Kogyo KK
Priority date: 2017-03-03
Filing date: 2017-03-03
Publication date: 2021-02-03
Anticipated expiration: 2037-03-03
Also published as: JP2018146003A

Description

本発明は、給湯器や空気調和器、冷凍機等の機器で発生するドレン排水を自然排水により排出する排水流路に設けられる管継手、排水構造及び排水管接続部構造に関するものである。 The present invention relates to a pipe joint, a drainage structure, and a drainage pipe connection portion structure provided in a drainage flow path for discharging drainage drainage generated in equipment such as a water heater, an air conditioner, and a refrigerator by natural drainage.

潜熱回収型の給湯器やエアコン等の空気調和器、冷凍機、冷却塔などの機器に結露等によって生じたドレン排水は排水管からなる排水流路を通して排出されている。排水管は、例えば特許文献１にも記載されているように、建物の壁面に沿って縦方向に配管され、ドレン排水は通常上流側から下流側に自然排水されて雨樋や雨水側溝等に排出されている。 Drain drainage generated by dew condensation on equipment such as latent heat recovery type water heaters, air conditioners such as air conditioners, refrigerators, and cooling towers is discharged through a drainage channel consisting of drainage pipes. As described in Patent Document 1, for example, the drainage pipe is piped in the vertical direction along the wall surface of the building, and the drainage drainage is usually naturally drained from the upstream side to the downstream side to a gutter, a rainwater gutter, or the like. It has been discharged.

ここで、排水流路は一般には可撓性を有しない硬質排水管が使用され管継手により連結されているが、流路途中に壁面の段差や障害物があって迂回する必要がある箇所や別の壁面に移ったりする箇所においては波付管、蛇腹管等の自在に曲げられる可撓性を有する排水管が使用される。この硬質排水管と可撓性排水管との双方が使用されている排水流路では更に多くの管継手が使用され排水管同士が連結されている。このような排水流路において、硬質排水管と可撓性排水管とを接続するときは、管継手を挟んでその上流側に硬質排水管が配管され下流側に可撓性排水管が配管される場合と、逆の、管継手を挟んだ上流側に可撓性排水管が配管され下流側に硬質排水管が配管される場合とがある。 Here, the drainage flow path is generally a rigid drainage pipe having no flexibility and is connected by a pipe joint, but there is a step or obstacle on the wall surface in the middle of the flow path and it is necessary to bypass it. Flexible drainage pipes such as corrugated pipes and bellows pipes are used at places where they move to another wall surface. In the drainage flow path where both the hard drainage pipe and the flexible drainage pipe are used, more pipe joints are used to connect the drainage pipes to each other. In such a drainage flow path, when the hard drainage pipe and the flexible drainage pipe are connected, the hard drainage pipe is piped on the upstream side and the flexible drainage pipe is piped on the downstream side across the pipe joint. In some cases, on the contrary, a flexible drain pipe is piped on the upstream side of the pipe joint and a hard drain pipe is piped on the downstream side.

特開２０１１−１６２９４７号公報Japanese Unexamined Patent Publication No. 2011-162947

しかし、異なる種類の硬質排水管と可撓性排水管とを連結する管継手は、硬質排水管、可撓性排水管が管継手を挟んだ上流側、下流側のいずれにあるかによって使い分ける必要があった。このため、接続作業、部品管理が煩わしく、コスト高となっていた。 However, the pipe joint that connects different types of hard drainage pipes and flexible drainage pipes needs to be used properly depending on whether the hard drainage pipe or the flexible drainage pipe is on the upstream side or the downstream side of the pipe joint. was there. For this reason, connection work and parts management are troublesome, and the cost is high.

なお、管継手には、可撓性排水管等の排水管との接続箇所での水漏れを防止するため、管継手の外壁と排水管の外面との隙間にはパッキングが介挿されることが多い。しかし、本願のような、結露等によって生じたドレン排水を上流側から下流側に自然排出させるものである場合は、管継手と排水管との接続部には多大な水圧はかからないので、パッキングの部品コスト、劣化による交換等のメンテナンスなどを考慮すれば、パッキングを使用しなくてよければ好都合である。 In addition, in order to prevent water leakage at the connection point with the drain pipe such as a flexible drain pipe, the pipe joint may have a packing inserted in the gap between the outer wall of the pipe joint and the outer surface of the drain pipe. There are many. However, in the case where the drainage drainage generated by dew condensation or the like is naturally discharged from the upstream side to the downstream side as in the present application, a large amount of water pressure is not applied to the connection portion between the pipe joint and the drainage pipe. Considering the cost of parts and maintenance such as replacement due to deterioration, it is convenient if packing is not used.

そこで、本発明は、ドレン排水を自然排水によって排出する排水流路において、非可撓性排水管と可撓性排水管とを接続するものであって、前記各排水管がそれぞれ上流側、下流側のいずれに接続されたときでも共通して使用することができ、また、可撓性排水管との間にパッキングの介挿を必要としない管継手、排水構造及び排水管接続部構造の提供を課題とするものである。 Therefore, the present invention connects the inflexible drainage pipe and the flexible drainage pipe in the drainage flow path for draining the drainage drainage by natural drainage, and the drainage pipes are upstream and downstream, respectively. Providing pipe joints, drainage structures and drainage pipe connection structures that can be used in common when connected to any of the sides and do not require the insertion of packing between the flexible drainage pipe. Is the subject.

請求項１の管継手は、機器のドレン排水流路に設けられるものであって、
一端側に、可撓性を有しない非可撓性排水管または排水管継手が接続される第１接続口が設けられ、
他端側に、外面及び内面の少なくとも一方に凹部及び凸部が交互に形成されて可撓性を有する可撓性排水管が接続される第２接続口が設けられ、
前記第２接続口は、前記可撓性排水管の端部が内挿される外筒と、該外筒に内挿された前記可撓性排水管の端部に内挿される内筒と、前記可撓性排水管の凹部に係合し該可撓性排水管を抜け止め状態とする係合部と、を備え、
前記管継手の内部に形成された排水空間と該管継手の外部とは、前記第２接続口の外筒と前記可撓性排水管の外面との間が非水密状態にあって、連通しており、
前記内筒の開口縁部に形成された排水溢れ縁は、前記外筒の開口縁部に形成された排水溢れ縁及び前記係合部よりも、第２接続口の奥方に位置するものである。 The pipe joint according to claim 1 is provided in the drain drainage flow path of the device.
A first connection port is provided on one end side to which a non-flexible drainage pipe or drainage pipe joint is connected.
On the other end side, a second connection port is provided, in which concave portions and convex portions are alternately formed on at least one of the outer surface and the inner surface to connect a flexible drainage pipe having flexibility.
The second connection port includes an outer cylinder into which the end of the flexible drain pipe is inserted, an inner cylinder inserted into the end of the flexible drain pipe inserted in the outer cylinder, and the inner cylinder. An engaging portion that engages with the recess of the flexible drain pipe to prevent the flexible drain pipe from coming off is provided.
The drainage space formed inside the pipe joint and the outside of the pipe joint are communicated with each other because the outer cylinder of the second connection port and the outer surface of the flexible drain pipe are in a non-watertight state. And
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the second connection port with respect to the drainage overflow edge formed at the opening edge portion of the outer cylinder and the engaging portion. ..

これにより、ドレン排水を自然排水によって排出する排水流路において、管継手の第２接続口は、外筒と内筒とを備え、内筒の排水溢れ縁は可撓性排水管の端部に内挿されるので、第１接続口を上側とした向きで、可撓性排水管が接続される第２接続口を可撓性排水管の上流側に使用したときは、上流から第１接続口を通して流れ込んできたドレン排水は内筒があることによって外側の可撓性排水管側に浸入するのが防止され、外筒と可撓性排水管との間を流れて管継手の外部に流出することが起こりにくい。また、第１接続口を下側とした向きで、第２接続口を可撓性排水管の下流側に使用したときは、内筒の排水溢れ縁が、外筒の排水溢れ縁及び係合部よりも第２接続口の奥方に位置する、すなわち外筒の排水溢れ縁及び係合部より低い位置にあるので、可撓性排水管側から流れてきたドレン排水の一部が内筒の外側に流れ込んで内筒と外筒との間に滞り内筒の排水溢れ縁から溢れても、外筒により管継手の外部に流出するのが規制される。 As a result, in the drainage flow path for draining drainage by natural drainage, the second connection port of the pipe joint is provided with an outer cylinder and an inner cylinder, and the drainage overflow edge of the inner cylinder is at the end of the flexible drainage pipe. Since it is inserted, when the second connection port to which the flexible drain pipe is connected is used on the upstream side of the flexible drain pipe with the first connection port facing upward, the first connection port is used from the upstream. The drainage drainage that has flowed in through the inner cylinder is prevented from entering the outer flexible drainage pipe side due to the presence of the inner cylinder, and flows between the outer cylinder and the flexible drainage pipe and flows out to the outside of the pipe joint. It's hard to happen. Further, in a direction of the first connection port and the lower, when using the second connection port on the downstream side of the flexible drainage tube drainage overflow edge of the inner tube, drainage overflow edge and the engagement of the outer cylinder located deeper in the second connection port than parts, i.e., in the waste water overflowing lower edge and engaging portion position of the outer cylinder, a portion of the drain wastewater flowing from the flexible drainage pipe side of the inner cylinder Even if it flows to the outside and stays between the inner cylinder and the outer cylinder and overflows from the drainage overflow edge of the inner cylinder, the outer cylinder regulates the outflow to the outside of the pipe joint.

請求項２の管継手は、管継手が垂直状態から所定角度まで傾いても、第２接続口の内筒の排水溢れ縁は、第２接続口の外筒の排水溢れ縁より下方に位置する。
これにより、排水流路において管継手は所定角度まで傾斜させて排水管と接続することができる。その結果、ドレン排水の現場の状況に応じて、障害物を迂回させるなどして排水流路を形成することも可能となり、排水流路形成の自由度が高まる。 In the pipe joint of claim 2, even if the pipe joint is tilted from the vertical state to a predetermined angle, the drainage overflow edge of the inner cylinder of the second connection port is located below the drainage overflow edge of the outer cylinder of the second connection port. ..
As a result, the pipe joint can be inclined to a predetermined angle in the drainage flow path and connected to the drainage pipe. As a result, it is possible to form a drainage channel by bypassing obstacles according to the situation of the drainage drainage site, and the degree of freedom in forming the drainage channel is increased.

請求項３の排水構造は、排水流路の最上流に設置された機器の下側に、請求項１または請求項２の構成を備えた第１管継手がその第１接続口において直接または間接的に接続され、
前記第１管継手の第２接続口に、可撓性を有する可撓性排水管の上端が接続され、
前記可撓性排水管の下端に、請求項１または請求項２の構成を備えた第２管継手がその第２接続口において接続され、
前記第２管継手の下流側となる第１接続口に、可撓性を有しない非可撓性排水管または排水管継手が接続されたものである。 In the drainage structure of claim 3, a first pipe joint having the configuration of claim 1 or 2 is directly or indirectly at the first connection port under the equipment installed at the uppermost stream of the drainage flow path. Connected to
The upper end of the flexible drainage pipe having flexibility is connected to the second connection port of the first pipe joint.
A second pipe joint having the configuration of claim 1 or 2 is connected to the lower end of the flexible drainage pipe at the second connection port.
A non-flexible drainage pipe or a drainage pipe joint having no flexibility is connected to the first connection port on the downstream side of the second pipe joint.

請求項４の排水管接続部構造は、ドレン排水の排水管に管継手が接続されたものであって、
前記管継手は、
一端に形成された上流側となる筒状の上流側接続口に、外面及び内面の少なくとも一方に凹部及び凸部が交互に形成されて可撓性を有する波付管からなる排水管が接続され、他端に形成された下流側となるドレン排水の排出口から、前記上流側接続口から流入したドレン排水を排出可能であり、
前記上流側接続口に形成された外筒に、前記排水管の端部が内挿されるとともに、前記排水管の端部に、前記上流側接続口に設けられ前記ドレン排水の排出口の内部と連通する中空部を有する内筒が内挿され、前記排水管の凹部に係合部が係合して該排水管が抜け止め状態とされ、
前記内筒の開口縁部に形成された排水溢れ縁は、前記外筒の開口縁部に形成された排水溢れ縁及び前記係合部よりも前記上流側接続口の奥方に位置しており、
更に、前記管継手の内部に形成された排水空間と該管継手の外部とは、前記上流側接続口の外筒と前記排水管の外面との間が非水密状態にあって、連通しているものである。
ここで、「上流側接続口」は請求項１乃至請求項３の「第２接続口」に相当し、「ドレン排水の排出口」は「第１接続口」に、「波付管からなる排水管」は「可撓性排水管」に相当する。 The drainage pipe connection portion structure of claim 4 is a drainage drainage pipe to which a pipe joint is connected.
The pipe fitting
A drainage pipe made of a flexible corrugated pipe in which concave portions and convex portions are alternately formed on at least one of an outer surface and an inner surface is connected to a tubular upstream side connection port formed at one end. The drain drainage that has flowed in from the upstream connection port can be discharged from the drain drainage discharge port on the downstream side formed at the other end.
The end of the drainage pipe is inserted into the outer cylinder formed at the upstream connection port, and the end of the drainage pipe is provided at the upstream connection port with the inside of the drainage drainage discharge port. An inner cylinder having a hollow portion that communicates is inserted, and the engaging portion engages with the recess of the drain pipe to prevent the drain pipe from coming off.
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the drainage overflow edge formed at the opening edge portion of the outer cylinder and the upstream side connection port from the engaging portion .
Further, the drainage space formed inside the pipe joint and the outside of the pipe joint communicate with each other because the outer cylinder of the upstream connection port and the outer surface of the drain pipe are in a non-watertight state. It is something that is.
Here, the "upstream connection port" corresponds to the "second connection port" of claims 1 to 3, and the "drain drainage discharge port" is the "first connection port" and is composed of a "corrugated pipe". "Drainage pipe" corresponds to "flexible drainage pipe".

本発明は、ドレン排水を自然排水によって排出する排水流路において、管継手の第２接続口が、外筒と内筒とを備え、内筒の開口縁部に形成された排水溢れ縁は可撓性排水管の端部に内挿されるとともに、内筒の排水溢れ縁が外筒の排水溢れ縁及び係合部よりも第２接続口の奥方に位置しているので、非可撓性排水管と可撓性排水管とを管継手により接続する場合に、前記各排水管が管継手の上流側、下流側のどちらに配管されたときでも、ドレン排水が管継手の外部に洩れ出すことはないから、管継手は、上下のどちらの向きで使用されても共通して使用することができ、各排水管の配管位置に応じて専用のものを用意して使い分ける必要がない。したがって、管継手による接続作業、部品管理が容易であり、コストも削減できる。 According to the present invention, in a drainage flow path for draining drainage by natural drainage, the second connection port of the pipe joint is provided with an outer cylinder and an inner cylinder, and a drainage overflow edge formed at the opening edge of the inner cylinder is acceptable. Inflexible drainage because it is inserted into the end of the flexible drainage pipe and the drainage overflow edge of the inner cylinder is located behind the drainage overflow edge and the engaging part of the outer cylinder at the second connection port. When the pipe and the flexible drain pipe are connected by a pipe joint, the drain drainage leaks to the outside of the pipe joint regardless of whether each of the drain pipes is piped on the upstream side or the downstream side of the pipe joint. Therefore, the pipe joint can be used in common regardless of whether it is used in the vertical direction, and it is not necessary to prepare and use a dedicated pipe joint according to the piping position of each drainage pipe. Therefore, connection work using pipe joints, parts management are easy, and costs can be reduced.

また、水圧をかけずにドレン排水を自然排水によって排出する排水流路においては、管継手の外筒と可撓性排水管との間にパッキングを設けなくても、前述のようにドレン排水が管継手の外部に流出するのを防止できるので、前記パッキングは不要とし得る。このため、部品コストを削減でき、パッキングの劣化による交換等のメンテナンスも不要となる。 Further, in the drainage flow path in which drainage drainage is discharged by natural drainage without applying water pressure, drainage drainage can be performed as described above even if packing is not provided between the outer cylinder of the pipe joint and the flexible drainage pipe. The packing may be unnecessary because it can be prevented from flowing out to the outside of the pipe joint. Therefore, the cost of parts can be reduced, and maintenance such as replacement due to deterioration of the packing becomes unnecessary.

本発明の実施形態の排水構造を示す側面図である。It is a side view which shows the drainage structure of embodiment of this invention. 図１の管継手を示し、(a)は斜視図、(b)は正面図である。The pipe joint of FIG. 1 is shown, (a) is a perspective view, and (b) is a front view. 図１の管継手の断面図である。It is sectional drawing of the pipe joint of FIG. 図１の排水構造の上半部の斜視図である。It is a perspective view of the upper half of the drainage structure of FIG. 図１の排水構造の上半部の断面図である。It is sectional drawing of the upper half part of the drainage structure of FIG. 図１の排水構造の下半部の斜視図である。It is a perspective view of the lower half of the drainage structure of FIG. 図１の排水構造の下半部の断面図である。It is sectional drawing of the lower half part of the drainage structure of FIG. 図２の管継手を傾斜した状態で接続したときの外筒と内筒との空間に流入したドレン排水の溢れ状況を説明する説明図である。It is explanatory drawing explaining the overflow state of the drain drainage flowing into the space between the outer cylinder and the inner cylinder when the pipe joint of FIG. 2 is connected in an inclined state.

以下、本発明の実施形態の管継手及び排水構造を図に基づいて説明する。
図１において、本実施形態の管継手１０は、機器のドレン排水流路に設けられ、可撓性を有しない非可撓性排水管５０と可撓性を有する可撓性排水管５１とを接続するものである。前記ドレン排水流路に形成された排水構造１は、排水流路の上流側に設置された機器の下方に前記管継手１０が配設され、その下側に可撓性排水管５１の上端が接続され、更に、可撓性排水管５１の下端に前記管継手１０と同一の管継手１０が上下向きを逆にして接続され、この管継手１０の下側に非可撓性排水管５０が接続された構造となっている。なお、図４及び図５は、図１における可撓性排水管５１の上部側半分を示し、図６及び図７は、可撓性排水管５１の下部側半分を示す。以下、各構成部材について詳細に説明する。 Hereinafter, the pipe joint and the drainage structure of the embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the pipe joint 10 of the present embodiment is provided in the drain drainage flow path of the device, and has a non-flexible drainage pipe 50 having no flexibility and a flexible drainage pipe 51 having flexibility. It is for connecting. In the drainage structure 1 formed in the drain drainage flow path, the pipe joint 10 is arranged below the equipment installed on the upstream side of the drainage flow path, and the upper end of the flexible drainage pipe 51 is below the pipe joint 10. Further, the same pipe joint 10 as the pipe joint 10 is connected to the lower end of the flexible drain pipe 51 with the pipe joint 10 turned upside down, and the inflexible drain pipe 50 is connected to the lower side of the pipe joint 10. It has a connected structure. 4 and 5 show the upper half of the flexible drain pipe 51 in FIG. 1, and FIGS. 6 and 7 show the lower half of the flexible drain pipe 51. Hereinafter, each component will be described in detail.

図１において、排水流路の上流側に設置された機器として潜熱回収型給湯器７０が例示されており、ここからドレン排水が排出される。潜熱回収型給湯器７０は、二次熱交換器を設け、従来型の給湯器で燃焼排ガスとして廃棄していた熱をリサイクルすることで熱効率を向上させたものであり、その際にドレン排水が発生する。ドレン排水は通常酸性であるが、中和器で中和して排出される。潜熱回収型給湯器７０で発生するドレン排水は、最大排水量が定められており、排水量は０．５〜１．５ｌ／日程度で、ドレン排水の水質は、雨水と同等程度であるから、ドレン排水流路から雨樋６９、雨水側溝等の雨水系統や排水設備に接続され排出される。 In FIG. 1, a latent heat recovery type water heater 70 is exemplified as a device installed on the upstream side of the drainage flow path, and drainage drainage is discharged from the latent heat recovery type water heater 70. The latent heat recovery type water heater 70 is provided with a secondary heat exchanger to improve the thermal efficiency by recycling the heat that was wasted as combustion exhaust gas in the conventional water heater, and drain drainage is discharged at that time. Occur. Drain wastewater is usually acidic, but it is neutralized by a neutralizer and discharged. The maximum amount of drainage generated by the latent heat recovery type water heater 70 is set, the amount of drainage is about 0.5 to 1.5 l / day, and the quality of drainage drainage is about the same as rainwater. It is connected to the rainwater system such as the rain gutter 69 and the rainwater gutter and the drainage facility from the drainage channel and discharged.

なお、本実施形態では、潜熱回収型給湯器７０の下側には継手６６を介して間接排水用器具６０が取り付けられている。間接排水用器具６０は、下方から汚水が逆流したり、ガスが流入したり、害虫等が侵入したりするのを防止するために、図５に示すように、上流側筒部６１と下流側筒部６２とを直結せず、その間に空間Ｓを設けて排水するようにしたものである。 In this embodiment, an indirect drainage device 60 is attached to the lower side of the latent heat recovery type water heater 70 via a joint 66. The indirect drainage device 60 has an upstream side cylinder portion 61 and a downstream side as shown in FIG. 5 in order to prevent sewage from flowing back from below, gas from flowing in, pests and the like invading. It is not directly connected to the cylinder portion 62, but a space S is provided between them to drain water.

すなわち、間接排水用器具６０は、図５において、その上流側筒部６１から空間Ｓを隔てて下流側筒部６２が設けられ、下流側筒部６２の上部は上端開口が上流側筒部６１の下端開口より大きい径を有する漏斗状の受け部６３となっている。上流側筒部６１は直管状の非可撓性排水管で形成され、その上半部６１ａは潜熱回収型給湯器７０の下側の継手６６に接着等により接続されている。下流側筒部６２は直管状の非可撓性排水管で形成され、その下半部６２ａを形成する非可撓性排水管５０は接着等によって管継手１０に接続されるようになっている。間接排水用器具６０に空間Ｓが設けられ、上流側筒部６１と下流側筒部６２とは連通していないので、下方から汚水が逆流しても間接排水用器具６０の空間Ｓの外側の外周壁６４に設けられたがらり状の排出窓６５から大気中に溢れ出て上流の機器側には上昇せず、害虫類も機器側に侵入することはできない。 That is, in FIG. 5, the indirect drainage device 60 is provided with a downstream tubular portion 62 with a space S separated from the upstream tubular portion 61, and an upper end opening of the downstream tubular portion 62 is an upstream tubular portion 61. It is a funnel-shaped receiving portion 63 having a diameter larger than that of the lower end opening of the above. The upstream side cylinder portion 61 is formed of a straight tubular inflexible drainage pipe, and the upper half portion 61a is connected to a joint 66 on the lower side of the latent heat recovery type water heater 70 by adhesion or the like. The downstream side tubular portion 62 is formed of a straight tubular inflexible drainage pipe, and the inflexible drainage pipe 50 forming the lower half portion 62a is connected to the pipe joint 10 by adhesion or the like. .. Since the space S is provided in the indirect drainage device 60 and the upstream side cylinder portion 61 and the downstream side cylinder portion 62 do not communicate with each other, even if sewage flows backward from below, the space S is outside the space S of the indirect drainage device 60. It overflows into the atmosphere from the empty discharge window 65 provided on the outer peripheral wall 64 and does not rise to the upstream device side, and pests cannot invade the device side.

排水流路を構成する非可撓性排水管５０は、外面平滑な直状の塩ビ管等で形成されている。また、可撓性排水管５１は、外面及び内面に凹部及び凸部が交互に形成されて可撓性を有する波付管からなり、合成樹脂等で形成されている。 The inflexible drainage pipe 50 constituting the drainage flow path is formed of a straight PVC pipe or the like having a smooth outer surface. Further, the flexible drainage pipe 51 is made of a corrugated pipe having flexibility by alternately forming concave portions and convex portions on the outer surface and the inner surface, and is made of synthetic resin or the like.

可撓性排水管５１の上下に接続された管継手１０は、いずれも同一のものが使用されている。管継手１０は、図２及び図３に示すように、一端側すなわち図２及び図３における下側に、非可撓性排水管５０が接続される略円筒状の第１接続口２０が設けられ、他端側すなわち図２及び図３における上側に、可撓性排水管５１が接続される円筒状の第２接続口３０が設けられている。そして、第２接続口３０は、可撓性排水管５１の端部が内挿される外筒３１と、可撓性排水管５１の凹部に係合し可撓性排水管５１を抜け止め状態とする係合部４０と、を備えている。更に、本発明の管継手１０には、外筒３１に内挿された可撓性排水管５１の端部に内挿される内筒３２が設けられている。管継手１０は合成樹脂により形成されている。 The same pipe joint 10 is used for the pipe joints 10 connected above and below the flexible drainage pipe 51. As shown in FIGS. 2 and 3, the pipe joint 10 is provided with a substantially cylindrical first connection port 20 to which the inflexible drainage pipe 50 is connected, on one end side, that is, on the lower side in FIGS. 2 and 3. A cylindrical second connection port 30 to which the flexible drain pipe 51 is connected is provided on the other end side, that is, on the upper side in FIGS. 2 and 3. Then, the second connection port 30 engages with the outer cylinder 31 into which the end of the flexible drain pipe 51 is inserted and the recess of the flexible drain pipe 51 to prevent the flexible drain pipe 51 from coming off. The engaging portion 40 and the engaging portion 40 are provided. Further, the pipe joint 10 of the present invention is provided with an inner cylinder 32 that is inserted into the end of the flexible drainage pipe 51 that is inserted into the outer cylinder 31. The pipe joint 10 is made of synthetic resin.

第２接続口３０の外筒３１は、略円筒状をなし、その内径は内部に挿入される可撓性排水管５１の外径と略同一の大きさに形成されている。外筒３１は、図３における上端部の外面の１８０度離間した２箇所に、係合部４０の内面における対向する２箇所に形成された嵌合突起４１が嵌合する嵌合凹溝３３が設けられている。外筒３１の嵌合凹溝３３は周方向に所定長さに形成され、係合部４０の嵌合突起４１は周方向に嵌合凹溝３３の略半分の長さに形成されていて、外筒３１に対して係合部４０を周方向に回動させることにより、外筒３１と係合部４０とを接続したり解除できるようになっている。外筒３１の上端部には係合部４０の後述する複数の弾性片４３の先端突起４５が嵌入する複数の切欠３４が周方向に間隔をおいて形成されている。外筒３１の上端の開口縁部は、排水溢れ縁３５となっている。 The outer cylinder 31 of the second connection port 30 has a substantially cylindrical shape, and its inner diameter is formed to be substantially the same as the outer diameter of the flexible drain pipe 51 inserted inside. The outer cylinder 31 has a fitting recess 33 in which fitting protrusions 41 formed at two opposite positions on the inner surface of the engaging portion 40 are fitted at two locations 180 degrees apart from the outer surface of the upper end portion in FIG. It is provided. The fitting groove 33 of the outer cylinder 31 is formed to have a predetermined length in the circumferential direction, and the fitting protrusion 41 of the engaging portion 40 is formed to be substantially half the length of the fitting concave groove 33 in the circumferential direction. By rotating the engaging portion 40 with respect to the outer cylinder 31 in the circumferential direction, the outer cylinder 31 and the engaging portion 40 can be connected to and disconnected from each other. At the upper end of the outer cylinder 31, a plurality of notches 34 into which the tip protrusions 45 of the plurality of elastic pieces 43 described later of the engaging portion 40 are fitted are formed at intervals in the circumferential direction. The opening edge at the upper end of the outer cylinder 31 is a drainage overflow edge 35.

外筒３１の内面は、凹凸のない平滑面で形成され、内部に挿入される可撓性排水管５１の外面との間にパッキング等の封止材は取り付けられるようにはなっていない。すなわち、管継手１０に可撓性排水管５１が接続されたとき、外筒３１と可撓性排水管５１の外面との間は非水密状態にあり、管継手１０の内部に形成された排水空間１１と管継手１０の外部とは連通する状態にある。 The inner surface of the outer cylinder 31 is formed of a smooth surface without unevenness, and a sealing material such as packing is not attached between the inner surface and the outer surface of the flexible drain pipe 51 inserted inside. That is, when the flexible drain pipe 51 is connected to the pipe joint 10, the outer cylinder 31 and the outer surface of the flexible drain pipe 51 are in a non-watertight state, and the drainage formed inside the pipe joint 10 is in a non-watertight state. The space 11 and the outside of the pipe joint 10 are in a state of communicating with each other.

係合部４０は、第２接続口３０の外筒３１の上端部に着脱自在に取り付けられている。係合部４０は略円筒状をなし、図３の上端部の内面には上端開口縁４２を基端として先端側が内外方向に撓む弾性片４３が周方向に所定の間隔をおいて複数突設されている。弾性片４３は帯板状をなし、先端部には可撓性排水管５１の外面の凹部に係合する係合爪４４が形成されており、係合爪４４が可撓性排水管５１の外面の凹部に係合することによって、可撓性排水管５１は管継手１０から抜け止め状態となる。弾性片４３の先端突起４５は、前述のように、外筒３１の切欠３４内に嵌入するようになっている。 The engaging portion 40 is detachably attached to the upper end portion of the outer cylinder 31 of the second connection port 30. The engaging portion 40 has a substantially cylindrical shape, and a plurality of elastic pieces 43 whose tip side bends inward and outward with the upper end opening edge 42 as the base end project on the inner surface of the upper end portion in FIG. 3 at predetermined intervals in the circumferential direction. It is set up. The elastic piece 43 has a strip shape, and an engaging claw 44 that engages with a recess on the outer surface of the flexible drain pipe 51 is formed at the tip thereof, and the engaging claw 44 is the flexible drain pipe 51. By engaging with the concave portion on the outer surface, the flexible drainage pipe 51 is in a state of being prevented from coming off from the pipe joint 10. As described above, the tip protrusion 45 of the elastic piece 43 is fitted into the notch 34 of the outer cylinder 31.

第２接続口３０の内筒３２は、管継手１０の内部に形成された排水空間１１において第１接続口２０と第２接続口３０とを仕切る円環状の仕切部１２から管軸方向に立設された円管で形成され、中空部３６を有し、外径は可撓性排水管５１の内径と略同一に形成されている。内筒３２の高さは、管継手１０が図３と上下逆向きの垂直方向に配置されている状態、すなわち図５に示した、下方から可撓性排水管５１が挿入され接続されている状態で、ドレン排水が上方から流れてきたときに、ドレン排水が内筒３２の外方の可撓性排水管５１側に流入するのを阻止できる大きさであれば足りる。また、内筒３２の高さは、管継手１０が図３の向きにあって可撓性排水管５１が上方から挿入され接続されている状態において、ドレン排水が矢印で示すように管継手１０の内部の排水空間１１から管継手１０の外部に流出しないようにすべく、外筒３１の高さに比べて低く設定されている。別言すれば、内筒３２の開口縁部に形成された排水溢れ縁３７は、外筒３１の開口縁部に形成された排水溢れ縁３５よりも第２接続口３０の奥方すなわち仕切部１２に近い位置に形成されている。 The inner cylinder 32 of the second connection port 30 stands in the pipe axis direction from the annular partition portion 12 that separates the first connection port 20 and the second connection port 30 in the drainage space 11 formed inside the pipe joint 10. It is formed of a circular pipe provided, has a hollow portion 36, and has an outer diameter substantially the same as the inner diameter of the flexible drain pipe 51. The height of the inner cylinder 32 is such that the pipe joint 10 is arranged in the vertical direction upside down with FIG. 3, that is, the flexible drainage pipe 51 is inserted and connected from below as shown in FIG. In this state, when the drain drainage flows from above, it is sufficient if the drain drainage has a size that can prevent the drain drainage from flowing into the flexible drainage pipe 51 side on the outside of the inner cylinder 32. Further, the height of the inner cylinder 32 is such that the pipe joint 10 is oriented in the direction of FIG. 3 and the flexible drain pipe 51 is inserted and connected from above, and the drain drainage is shown by the arrow in the pipe joint 10. The height is set lower than the height of the outer cylinder 31 so that the drainage space 11 inside the pipe does not flow out to the outside of the pipe joint 10. In other words, the drainage overflow edge 37 formed at the opening edge of the inner cylinder 32 is deeper than the drainage overflow edge 35 formed at the opening edge of the outer cylinder 31, that is, the partition portion 12. It is formed at a position close to.

このように形成された管継手１０は、排水流路において、図１に示すように、可撓性排水管５１の上流側に第１管継手１０Ａとして接続され、下流側に第２管継手１０Ｂとして接続されている。上流側の第１管継手１０Ａは、図１、４、５に示すように、第１接続口２０が上流側となる向きで、第１接続口２０が間接排水用器具６０の下流側筒部６２の非可撓性排水管５０で形成された下半部６２ａに接着により接続されている。そして、第１管継手１０Ａの第２接続口３０には可撓性排水管５１の一端部である上端部が下方から接続されている。可撓性排水管５１は、そのまま下方から第１管継手１０Ａの第２接続口３０内に挿入していくだけで、外面が第２接続口３０の弾性片４３を外方に撓ませつつ第２接続口３０の奥方に押し込まれ、先端が仕切部１２に当接した時点で、弾性片４３の係合爪４４が可撓性排水管５１の外面の凹部に係合し、第１管継手１０Ａに抜け止め状態に接続されている。 As shown in FIG. 1, the pipe joint 10 thus formed is connected as a first pipe joint 10A on the upstream side of the flexible drain pipe 51 and a second pipe joint 10B on the downstream side in the drainage flow path. Connected as. As shown in FIGS. 1, 4, and 5, the upstream first pipe joint 10A has the first connection port 20 facing the upstream side, and the first connection port 20 is the downstream side cylinder portion of the indirect drainage device 60. It is adhesively connected to the lower half 62a formed by the inflexible drain pipe 50 of 62. An upper end portion, which is one end portion of the flexible drainage pipe 51, is connected to the second connection port 30 of the first pipe joint 10A from below. The flexible drainage pipe 51 is simply inserted into the second connection port 30 of the first pipe joint 10A from below as it is, and the outer surface of the flexible drainage pipe 51 bends the elastic piece 43 of the second connection port 30 outward and the second When it is pushed into the back of the connection port 30 and the tip abuts on the partition portion 12, the engaging claw 44 of the elastic piece 43 engages with the recess on the outer surface of the flexible drain pipe 51, and the first pipe joint 10A It is connected to the retaining state.

更に、可撓性排水管５１の他端部である下端部には、図１、６、７に示すように、下流側の第２管継手１０Ｂが、第２接続口３０が上流側となる向きで、下方から接続されている。第２管継手１０Ｂは、第１管継手１０Ａへの可撓性排水管５１の接続と同様に、単に、第２管継手１０Ｂを可撓性排水管５１の下端部に外嵌していくだけで、弾性片４３の係合爪４４が可撓性排水管５１の外面の凹部に係合し、可撓性排水管５１に抜け止め状態に接続される。このように接続された第２管継手１０Ｂは、第１接続口２０が非可撓性排水管５０を直角に曲げて形成されたエルボ６７に接着により接続されている。 Further, as shown in FIGS. 1, 6 and 7, the second pipe joint 10B on the downstream side and the second connection port 30 are on the upstream side at the lower end portion which is the other end of the flexible drainage pipe 51. It is oriented and connected from below. The second pipe joint 10B simply fits the second pipe joint 10B to the lower end of the flexible drain pipe 51 in the same manner as the connection of the flexible drain pipe 51 to the first pipe joint 10A. , The engaging claw 44 of the elastic piece 43 engages with the recess on the outer surface of the flexible drain pipe 51, and is connected to the flexible drain pipe 51 in a retaining state. In the second pipe joint 10B connected in this way, the first connection port 20 is bonded to an elbow 67 formed by bending the inflexible drainage pipe 50 at a right angle.

排水流路は、上流側から間接排水用器具６０、第１管継手１０Ａ、可撓性排水管５１及び第２管継手１０Ｂの順に鉛直方向に接続されているが、この後は、エルボ６７により垂直方向から水平方向に向きを変え、継手６８を介して雨樋６９に接続されている。 The drainage flow path is connected in the vertical direction in the order of the indirect drainage device 60, the first pipe joint 10A, the flexible drainage pipe 51, and the second pipe joint 10B from the upstream side, but after that, the elbow 67 is used. It turns from the vertical direction to the horizontal direction and is connected to the rain gutter 69 via the joint 68.

このように構成された排水流路において、潜熱回収型給湯器７０で発生したドレン排水は、水圧がかかることなく重力による自然排水により、排水流路の垂直部分を下方に流れた後、雨樋６９を使用した雨水系統により外部に排出される。 In the drainage channel configured in this way, the drainage drainage generated by the latent heat recovery type water heater 70 flows downward through the vertical portion of the drainage channel by natural drainage due to gravity without applying water pressure, and then rain gutter. It is discharged to the outside by the rainwater system using 69.

ここで、排水流路のうち、可撓性排水管５１に第２管継手１０Ｂが接続された構成は、請求項の排水管接続部構造に相当するものでもある。なお、請求項の排水管接続部構造との関係において、「第２管継手１０Ｂ」は請求項の「管継手」に相当し、「第１接続口２０」は請求項の「ドレン排水の排出口」に、「第２接続口３０」は請求項の「上流側接続口」に、「可撓性排水管５１」は請求項の「波付管からなる排水管」にそれぞれ相当する。 Here, in the drainage flow path, the configuration in which the second pipe joint 10B is connected to the flexible drainage pipe 51 also corresponds to the drainage pipe connection portion structure of the claim. In relation to the drainage pipe connection portion structure of the claim, the "second pipe joint 10B" corresponds to the "pipe joint" of the claim, and the "first connection port 20" is the "drainage drainage drainage" of the claim. The "outlet", the "second connection port 30" correspond to the "upstream connection port" of the claim, and the "flexible drainage pipe 51" corresponds to the "drainage pipe made of a corrugated pipe" of the claim.

次に、このように構成された本実施形態の管継手１０、排水構造１の作用を説明する。
潜熱回収型給湯器７０のドレン排水の発生量は前述のように少量であり、ドレン排水は格別水圧をかけて排出されるものではなく、排水流路の上下落差により自然排水される。このような、ドレン排水を自然排水によって排出する排水流路において、管継手１０の第２接続口３０は、可撓性排水管５１の端部が内挿される外筒３１と、外筒３１に内挿された可撓性排水管５１の端部に内挿される内筒３２と、を備え、内筒３２の開口縁部に形成された排水溢れ縁３７は可撓性排水管５１の端部に内挿されるので、図４及び図５に示すように、第１管継手１０Ａを可撓性排水管５１の上流側に使用したとき、上流側に位置する第１接続口２０を通して流れ込んできたドレン排水は管継手１０の外部に流出しにくい。 Next, the operation of the pipe joint 10 and the drainage structure 1 of the present embodiment configured in this way will be described.
The amount of drainage drainage generated by the latent heat recovery type water heater 70 is small as described above, and the drainage drainage is not discharged by applying special water pressure, but is naturally drained by the vertical drop of the drainage channel. In such a drainage flow path for draining drainage by natural drainage, the second connection port 30 of the pipe joint 10 is inserted into an outer cylinder 31 into which the end of the flexible drainage pipe 51 is inserted and an outer cylinder 31. An inner cylinder 32 inserted into the end of the inserted flexible drain pipe 51 is provided, and the drainage overflow edge 37 formed at the opening edge of the inner cylinder 32 is the end of the flexible drain pipe 51. As shown in FIGS. 4 and 5, when the first pipe joint 10A was used on the upstream side of the flexible drain pipe 51, it flowed through the first connection port 20 located on the upstream side. Drain drainage does not easily flow out to the outside of the pipe joint 10.

一方、図６及び図７に示すように、第２管継手１０Ｂを可撓性排水管５１の下流側に使用したときは、内筒３２の排水溢れ縁３７が外筒３１の排水溢れ縁３５よりも第２接続口３０の奥方に位置しているので、図３に示すように、ドレン排水の一部が内筒３２の外側に流れ込んで内筒３２と外筒３１との間の空間内に溜まっても、溜まったドレン排水は、内筒３２の排水溢れ縁３７から第２管継手１０Ｂの排水空間１１内に溢れ出るだけで、外筒３１の排水溢れ縁３５には到達せず、したがって、管継手１０の外部に流出するのは回避される。なお、内筒３２の排水溢れ縁３７から溢れずに内筒３２と外筒３１との空間内に溜まったドレン排水は、自然に蒸発して消滅する。 On the other hand, as shown in FIGS. 6 and 7, when the second pipe joint 10B is used on the downstream side of the flexible drain pipe 51, the drainage overflow edge 37 of the inner cylinder 32 becomes the drainage overflow edge 35 of the outer cylinder 31. Since it is located deeper than the second connection port 30, as shown in FIG. 3, a part of the drain drainage flows to the outside of the inner cylinder 32 and is in the space between the inner cylinder 32 and the outer cylinder 31. The accumulated drainage drainage only overflows from the drainage overflow edge 37 of the inner cylinder 32 into the drainage space 11 of the second pipe joint 10B, and does not reach the drainage overflow edge 35 of the outer cylinder 31. Therefore, it is avoided that the pipe joint 10 flows out to the outside. The drainage drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 without overflowing from the drainage overflow edge 37 of the inner cylinder 32 naturally evaporates and disappears.

したがって、可撓性排水管５１の上流側に接続された第１管継手１０Ａ、及び可撓性排水管５１の下流側に接続された第２管継手１０Ｂのいずれにおいても、ドレン排水が管継手１０の外部に洩れ出すことがないから、１つの管継手１０は、第１管継手１０Ａとしても第２管継手１０Ｂとしても共通して使用することができる。このため、各排水管の配管位置に応じて専用の複数の管継手を用意して使い分ける必要はない。その結果、管継手１０を使用した接続作業を効率良く行なうことができ、部品管理も容易となる。更に、管継手１０の部品コストも削減できる。 Therefore, in both the first pipe joint 10A connected to the upstream side of the flexible drain pipe 51 and the second pipe joint 10B connected to the downstream side of the flexible drain pipe 51, the drain drainage is a pipe joint. Since it does not leak to the outside of 10, one pipe joint 10 can be commonly used as both the first pipe joint 10A and the second pipe joint 10B. Therefore, it is not necessary to prepare and use a plurality of dedicated pipe joints according to the piping position of each drainage pipe. As a result, the connection work using the pipe joint 10 can be efficiently performed, and the parts management becomes easy. Further, the component cost of the pipe joint 10 can be reduced.

また、水圧をかけずにドレン排水を自然排水によって排出する排水流路においては、管継手１０の外筒３１と可撓性排水管５１との間にパッキング等の何らかの水密部材を設けなくても、前述のようにして管継手１０の外部へのドレン排水の流出を防止することができる。このため、管継手１０の外筒３１と可撓性排水管５１との間にパッキング等の介挿を不要とすることができ、部品コストを削減でき、パッキング等の劣化による交換等のメンテナンスも不要となる。 Further, in the drainage flow path in which drainage drainage is discharged by natural drainage without applying water pressure, it is not necessary to provide some watertight member such as packing between the outer cylinder 31 of the pipe joint 10 and the flexible drainage pipe 51. As described above, it is possible to prevent the drainage drainage from flowing out to the outside of the pipe joint 10. Therefore, it is not necessary to insert packing or the like between the outer cylinder 31 of the pipe joint 10 and the flexible drainage pipe 51, the cost of parts can be reduced, and maintenance such as replacement due to deterioration of the packing or the like can be performed. It becomes unnecessary.

ここで、前述の、第２管継手１０Ｂを可撓性排水管５１の下流側に使用したときの、内筒３２の排水溢れ縁３７が外筒３１の排水溢れ縁３５よりも第２接続口３０の奥方に位置していることについて説明を加える。
前述の実施形態においては、可撓性排水管５１と管継手１０とが鉛直方向に接続されている状態を説明しているが、本実施形態では、内筒３２の排水溢れ縁３７が外筒３１の排水溢れ縁３５より第２接続口３０の奥方に位置していることにより、可撓性排水管５１と管継手１０とが鉛直方向に対して所定角度傾斜して接続されている状態においても、ドレン排水の一部が内筒３２の外側に流れ込んで外筒３１の排水溢れ縁３５から溢れて管継手１０の外部に流出するのを規制することができる。 Here, when the above-mentioned second pipe joint 10B is used on the downstream side of the flexible drain pipe 51, the drainage overflow edge 37 of the inner cylinder 32 is a second connection port rather than the drainage overflow edge 35 of the outer cylinder 31. Explain that it is located in the back of 30.
In the above-described embodiment, the state in which the flexible drainage pipe 51 and the pipe joint 10 are connected in the vertical direction is described, but in the present embodiment, the drainage overflow edge 37 of the inner cylinder 32 is the outer cylinder. By being located behind the second connection port 30 from the drainage overflow edge 35 of 31, the flexible drainage pipe 51 and the pipe joint 10 are connected at a predetermined angle with respect to the vertical direction. Further, it is possible to regulate that a part of the drain drainage flows to the outside of the inner cylinder 32, overflows from the drainage overflow edge 35 of the outer cylinder 31, and flows out to the outside of the pipe joint 10.

すなわち、図８において、管継手１０は図示しないが可撓性排水管５１の下端に下方から接続されており、かつ管継手１０の中心軸は鉛直軸Ｃに対して傾斜している。図８(a)は管継手１０の中心軸が鉛直軸Ｃに対してθ１の角度で傾斜している。本実施形態の管継手１０の場合、図８(a)の状態において、θ１は約６０度である。この傾斜においては、ドレン排水の一部が内筒３２の外側に流れて内筒３２と外筒３１との空間内に溜まって水平線Ｈを超え矢印で示すように内筒３２の排水溢れ縁３７から管継手１０の排水空間１１内に流出する状態になっても、内筒３２と外筒３１との空間内に溜まったドレン排水の液面は、外筒３１側についてはその内面の途中の高さにある。したがって、ドレン排水の一部が外筒３１の排水溢れ縁３５を超えて管継手１０の外部に洩れ出すことはない。 That is, in FIG. 8, although not shown, the pipe joint 10 is connected to the lower end of the flexible drainage pipe 51 from below, and the central axis of the pipe joint 10 is inclined with respect to the vertical axis C. In FIG. 8A, the central axis of the pipe joint 10 is inclined at an angle of θ1 with respect to the vertical axis C. In the case of the pipe joint 10 of the present embodiment, θ1 is about 60 degrees in the state of FIG. 8A. In this inclination, a part of the drain drainage flows to the outside of the inner cylinder 32, collects in the space between the inner cylinder 32 and the outer cylinder 31, crosses the horizon H, and as shown by an arrow, the drainage overflow edge 37 of the inner cylinder 32. Even if the drainage drainage is discharged into the drainage space 11 of the pipe joint 10, the liquid level of the drainage drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 is in the middle of the inner surface of the outer cylinder 31 side. At height. Therefore, a part of the drain drainage does not leak to the outside of the pipe joint 10 beyond the drainage overflow edge 35 of the outer cylinder 31.

この状態で、管継手１０を更に傾斜させていき、図８(b)に示す、傾斜角度が所定角度としてのθ２の大きさになると、内筒３２と外筒３１との空間内に溜まったドレン排水は、外筒３１の排水溢れ縁３５に達し、矢印で示すように外筒３１の外部側に流出する直前の状態となり、それ以上に傾けると外筒３１の排水溢れ縁３５から管継手１０の外部に流出することなる。 In this state, the pipe joint 10 is further tilted, and when the tilt angle becomes the size of θ2 as a predetermined angle as shown in FIG. 8 (b), it accumulates in the space between the inner cylinder 32 and the outer cylinder 31. The drain drainage reaches the drainage overflow edge 35 of the outer cylinder 31 and is in a state immediately before flowing out to the outside side of the outer cylinder 31 as shown by an arrow, and when tilted further, the pipe joint is connected from the drainage overflow edge 35 of the outer cylinder 31. It will leak to the outside of 10.

このことから、内筒３２と外筒３１との空間内に溜まったドレン排水は、管継手１０の中心軸が鉛直軸Ｃに対してθ２の角度となるまで管継手１０を傾斜させることができる、ということがいえる。つまり、排水流路において管継手１０は所定角度θ２まで傾斜させて排水管と接続することができる。このため、ドレン排水の現場の状況に応じて、障害物を迂回させるなどして排水流路を形成することも可能となり、排水流路形成の自由度が高まる。 From this, the drain drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 can incline the pipe joint 10 until the central axis of the pipe joint 10 has an angle of θ2 with respect to the vertical axis C. It can be said that. That is, in the drainage flow path, the pipe joint 10 can be inclined to a predetermined angle θ2 and connected to the drainage pipe. Therefore, depending on the situation of the drainage drainage site, it is possible to form a drainage channel by bypassing an obstacle, and the degree of freedom in forming the drainage channel is increased.

ここで、所定角度θ２は、外筒３１及び内筒３２の高さにより変化するので、管継手１０は、想定される現場での排水流路を念頭におきながら設計するとよい。なお、本実施形態の管継手１０の場合、所定角度θ２はおよそ８０度である。 Here, since the predetermined angle θ2 changes depending on the heights of the outer cylinder 31 and the inner cylinder 32, the pipe joint 10 may be designed with the assumed drainage flow path at the site in mind. In the case of the pipe joint 10 of the present embodiment, the predetermined angle θ2 is about 80 degrees.

ところで、上記実施形態の排水構造１は、各排水管及び管継手１０が図１に示した組み合わせで接続されているが、本発明を実施する場合には、この組み合わせに限られるものではなく、各種の仕様に構成することができる。 By the way, in the drainage structure 1 of the above embodiment, each drainage pipe and the pipe joint 10 are connected by the combination shown in FIG. 1, but in the case of carrying out the present invention, the drainage structure 1 is not limited to this combination. It can be configured to various specifications.

また、上記実施形態では、第１管継手１０Ａの第１接続口２０には間接排水用器具６０の非可撓性排水管５０からなる下半部６２ａが接続され、第２管継手１０Ｂの第１接続口２０にはエルボ６７を形成する非可撓性排水管５０の部分が接続されているが、管継手１０の第１接続口２０の外径がこれに接続される非可撓性排水管５０と同一の場合は、非可撓性排水管５０に換えて、これらの間にカップリング等の各種継手を介在させて接続すればよい。 Further, in the above embodiment, the lower half portion 62a formed of the inflexible drainage pipe 50 of the indirect drainage device 60 is connected to the first connection port 20 of the first pipe joint 10A, and the second pipe joint 10B is connected. A portion of the inflexible drainage pipe 50 forming the elbow 67 is connected to the 1 connection port 20, but the outer diameter of the first connection port 20 of the pipe joint 10 is connected to the inflexible drainage pipe. If it is the same as the pipe 50, it may be connected by interposing various joints such as couplings between them instead of the inflexible drain pipe 50.

加えて、第１管継手１０Ａは、間接排水用器具６０及び継手６６を介して潜熱回収型給湯器７０に間接的に接続されているが、潜熱回収型給湯器７０に直接接続してもよい。 In addition, although the first pipe joint 10A is indirectly connected to the latent heat recovery type water heater 70 via the indirect drainage device 60 and the joint 66, it may be directly connected to the latent heat recovery type water heater 70. ..

更に、管継手１０の第１接続口２０と直状管である非可撓性排水管５０とは接着により接続されているが、これに限られるものではなく、これらは単なる圧入手段により接続してもよいし、係合など他の手段によって接続してもよい。 Further, the first connection port 20 of the pipe joint 10 and the inflexible drainage pipe 50 which is a straight pipe are connected by adhesion, but the present invention is not limited to this, and these are connected by a mere press-fitting means. It may be connected by other means such as engagement.

そして、可撓性排水管５１は、外面及び内面に凹部及び凸部が交互に形成されているが、外層、内層の二重管であって、外層及び内層のいずれか一方のみに凹部及び凸部が交互に形成されたものであってもよい。 The flexible drainage pipe 51 has concave portions and convex portions alternately formed on the outer surface and the inner surface, but is a double pipe of an outer layer and an inner layer, and has concave portions and convex portions only in one of the outer layer and the inner layer. The portions may be formed alternately.

また、上記実施形態の排水流路は、下流側の端部を雨樋６９に接続してドレン排水を排出しているが、雨水側溝等の雨水系統に接続して排出することもでき、また、ドレンパンに導いて排出してもよく、その他の排水設備に接続して排出してもよい。 Further, in the drainage channel of the above embodiment, the drainage drainage is discharged by connecting the downstream end to the rain gutter 69, but it can also be connected to a rainwater system such as a rainwater gutter and discharged. , It may be guided to a drain pan and discharged, or it may be connected to another drainage facility and discharged.

なお、上記実施形態では、ドレン排水は潜熱回収型給湯器７０で発生したものを例示しているが、本発明は、空気調和機器等で発生した結露水、冷凍機、冷却塔、冷媒や熱媒として水を使用する装置で発生した排水などのドレン排水を排出する場合も同様に適用することができる。 In the above embodiment, the drain drainage is illustrated by the latent heat recovery type water heater 70, but the present invention includes dew condensation water, a refrigerator, a cooling tower, a refrigerant and heat generated by an air conditioner or the like. The same can be applied to the case of discharging drainage wastewater such as wastewater generated by a device that uses water as a medium.

１排水構造３２内筒
１０管継手３５外筒の排水溢れ縁
１０Ａ第１管継手３６中空部
１０Ｂ第２管継手３７内筒の排水溢れ縁
１１排水空間４０係合部
２０第１接続口５０非可撓性排水管
３０第２接続口５１可撓性排水管
３１外筒７０潜熱回収型給湯器 1 Drainage structure 32 Inner cylinder 10 Pipe joint 35 Drainage overflow edge of outer cylinder 10A 1st pipe joint 36 Hollow part 10B 2nd pipe joint 37 Drainage overflow edge of inner cylinder 11 Drainage space 40 Engagement part 20 1st connection port 50 Non Flexible drain pipe 30 Second connection port 51 Flexible drain pipe 31 Outer cylinder 70 Latent heat recovery type water heater

Claims

機器のドレン排水流路に設けられる管継手であって、
一端側に、可撓性を有しない非可撓性排水管または排水管継手が接続される第１接続口が設けられ、
他端側に、外面及び内面の少なくとも一方に凹部及び凸部が交互に形成されて可撓性を有する可撓性排水管が接続される第２接続口が設けられ、
前記第２接続口は、前記可撓性排水管の端部が内挿される外筒と、該外筒に内挿された前記可撓性排水管の端部に内挿される内筒と、前記可撓性排水管の凹部に係合し該可撓性排水管を抜け止め状態とする係合部と、を備え、
前記管継手の内部に形成された排水空間と該管継手の外部とは、前記第２接続口の外筒と前記可撓性排水管の外面との間が非水密状態にあって、連通しており、
前記内筒の開口縁部に形成された排水溢れ縁は、前記外筒の開口縁部に形成された排水溢れ縁及び前記係合部よりも、第２接続口の奥方に位置していることを特徴とする管継手。 It is a pipe joint provided in the drain drainage flow path of the equipment.
A first connection port is provided on one end side to which a non-flexible drainage pipe or drainage pipe joint is connected.
On the other end side, a second connection port is provided, in which concave portions and convex portions are alternately formed on at least one of the outer surface and the inner surface to connect a flexible drainage pipe having flexibility.
The second connection port includes an outer cylinder into which the end of the flexible drain pipe is inserted, an inner cylinder inserted into the end of the flexible drain pipe inserted in the outer cylinder, and the inner cylinder. An engaging portion that engages with the recess of the flexible drain pipe to prevent the flexible drain pipe from coming off is provided.
The drainage space formed inside the pipe joint and the outside of the pipe joint are communicated with each other because the outer cylinder of the second connection port and the outer surface of the flexible drain pipe are in a non-watertight state. And
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the second connection port with respect to the drainage overflow edge formed at the opening edge portion of the outer cylinder and the engaging portion . A pipe fitting characterized by.

前記第２接続口の内筒の排水溢れ縁は、前記管継手が垂直状態から所定角度まで傾いても、前記第２接続口の外筒の排水溢れ縁より下方に位置することを特徴とする請求項１に記載の管継手。 The drainage overflow edge of the inner cylinder of the second connection port is characterized in that it is located below the drainage overflow edge of the outer cylinder of the second connection port even if the pipe joint is tilted from a vertical state to a predetermined angle. The pipe fitting according to claim 1.

排水流路の最上流に設置された機器の下側に、請求項１または請求項２の構成を備えた第１管継手がその第１接続口において直接または間接的に接続され、
前記第１管継手の第２接続口に、可撓性を有する可撓性排水管の上端が接続され、
前記可撓性排水管の下端に、請求項１または請求項２の構成を備えた第２管継手がその第２接続口において接続され、
前記第２管継手の下流側となる第１接続口に、可撓性を有しない非可撓性排水管または排水管継手が接続されたことを特徴とする排水構造。 A first pipe fitting having the configuration of claim 1 or 2 is directly or indirectly connected at the first connection port to the lower side of the equipment installed at the uppermost stream of the drainage channel.
The upper end of the flexible drainage pipe having flexibility is connected to the second connection port of the first pipe joint.
A second pipe joint having the configuration of claim 1 or 2 is connected to the lower end of the flexible drainage pipe at the second connection port.
A drainage structure characterized in that a non-flexible drainage pipe or a drainage pipe joint is connected to a first connection port on the downstream side of the second pipe joint.

ドレン排水の排水管に管継手が接続された排水管接続部構造であって、
前記管継手は、
一端に形成された上流側となる筒状の上流側接続口に、外面及び内面の少なくとも一方に凹部及び凸部が交互に形成されて可撓性を有する波付管からなる排水管が接続され、他端に形成された下流側となるドレン排水の排出口から、前記上流側接続口から流入したドレン排水を排出可能であり、
前記上流側接続口に形成された外筒に、前記排水管の端部が内挿されるとともに、前記排水管の端部に、前記上流側接続口に設けられ前記ドレン排水の排出口の内部と連通する中空部を有する内筒が内挿され、前記排水管の凹部に係合部が係合して該排水管が抜け止め状態とされ、
前記内筒の開口縁部に形成された排水溢れ縁は、前記外筒の開口縁部に形成された排水溢れ縁及び前記係合部よりも前記上流側接続口の奥方に位置しており、
更に、前記管継手の内部に形成された排水空間と該管継手の外部とは、前記上流側接続口の外筒と前記排水管の外面との間が非水密状態にあって、連通していることを特徴とする排水管接続部構造。 It is a drainage pipe connection structure in which a pipe joint is connected to the drainage pipe of drainage drainage.
The pipe fitting
A drainage pipe made of a flexible corrugated pipe in which concave portions and convex portions are alternately formed on at least one of an outer surface and an inner surface is connected to a tubular upstream side connection port formed at one end. The drain drainage that has flowed in from the upstream connection port can be discharged from the drain drainage discharge port on the downstream side formed at the other end.
The end of the drainage pipe is inserted into the outer cylinder formed at the upstream connection port, and the end of the drainage pipe is provided at the upstream connection port with the inside of the drainage drainage discharge port. An inner cylinder having a hollow portion that communicates is inserted, and the engaging portion engages with the recess of the drain pipe to prevent the drain pipe from coming off.
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the drainage overflow edge formed at the opening edge portion of the outer cylinder and the upstream side connection port from the engaging portion .
Further, the drainage space formed inside the pipe joint and the outside of the pipe joint communicate with each other because the outer cylinder of the upstream connection port and the outer surface of the drain pipe are in a non-watertight state. Drainage pipe connection structure characterized by being