JP2021143756A - Check valve - Google Patents

Abstract

To provide a check valve using a material which easily deteriorates, such as an elastic material for the construction to be especially opened/closed, for enabling itself to be well utilized even when long-term deterioration occurs in an elastic material part.SOLUTION: The check valve includes a valve seat part provided on a flow path for fluid, and a valve body for abutting on the valve seat part for preventing the passage of the fluid from the downstream side. The valve body for abutting on the valve seat part at all times to close the flow path so that the valve body is separated from the valve seat part by the stress of the fluid from the upstream side to open the flow path to allow the passage of the fluid, includes an adjustment mechanism for adjusting the position of the valve body relative to the valve seat part when the valve body does not abut on the valve seat part with no stress of the fluid, to reset the valve body into the state of abutting on the valve seat part.SELECTED DRAWING: Figure 1

Description

本発明は、気体や液体等の流体の流路を形成する配管等、または流体である排水が流入する排水口等について、配管内部の流体が上流から下流には支障なく流れると共に、下流から上流への逆流は防止する、逆流防止弁に関するものである。 In the present invention, with respect to a pipe or the like that forms a flow path of a fluid such as a gas or a liquid, or a drainage port or the like through which drainage that is a fluid flows in, the fluid inside the pipe flows from upstream to downstream without any trouble, and from downstream to upstream. It relates to a check valve that prevents backflow to.

従来より、気体や液体等の流体を通過させるため、管体や継手部材を組み合わせて排気や排水等を行う配管構造が知られている。これらの配管構造は、上流から下流へと気体や液体を通過させるためのものであるが、下流側の配管で気体又は液体が大量に生じる等して、気体又は液体が逆流を生じる場合がある。下流側に排出された気体や液体は、排出の過程で汚物や危険な物質が混入する場合があり、このような汚染された流体が逆流して配管内を汚染したり、流入元に溢れることは不具合である。 Conventionally, there has been known a piping structure in which a pipe body or a joint member is combined to exhaust or drain water in order to allow a fluid such as a gas or a liquid to pass through. These piping structures are for passing gas or liquid from upstream to downstream, but gas or liquid may cause backflow due to a large amount of gas or liquid being generated in the piping on the downstream side. .. Gases and liquids discharged to the downstream side may be mixed with filth and dangerous substances in the process of discharge, and such contaminated fluid may flow back and contaminate the inside of the pipe or overflow to the inflow source. Is a bug.

そこで、特許文献１に記載されたような、配管内に上流から下流には支障なく流れると共に、下流から上流への逆流は防止する、配管の逆流防止弁を備えて流体の逆流を防ぐ構造が提案されている。
特許文献１に記載の逆流防止弁を備えた逆流防止弁継手は、流体である排水を通過させる排水用の配管に対して用いられる継手部材であって、以下に記載する継手本体と、逆流防止弁ユニットと、から構成される。
継手本体は、流体の流路を形成する管体部、管体部の上流側端部、及び下流側端部に備えられた接続部、管体部内に備えられた収納部、管部分の側面に設けられた収納部と連通する開口部、からなる。
逆流防止弁ユニットは、以下に記載する、弁本体と、逆流防止弁ユニット本体と、ロック部材と、から構成されてなる。
弁本体は、円盤状の弁体部と、該弁体部に対して略垂直に設けられた弁軸部と、から構成される。
逆流防止弁ユニット本体は、側面に蓋部分を備えた略板状の部材で、蓋部分の側面にパッキングを備えると共に、中央部分に排水の流路を設け、排水の流路上に弁体部と当接する弁座部を、流路の中心部分に弁軸部を保持固定する保持部を、それぞれ備えてなる。該保持部は、流路の内側面から２本のアーム部を保持部まで延出することで流路の中心位置で固定しており、２本のアーム部は保持部を中心に、対向する位置関係に配置されている。
ロック部材は、円盤状の部材であって、逆流防止弁ユニット本体の蓋部分に回動自在に取り付けられると共に、その側面に、回転により継手部材の開口部と嵌合する回転ロック構造を備えてなる。 Therefore, as described in Patent Document 1, a structure is provided in which a check valve for the pipe is provided to prevent the backflow of the fluid while flowing in the pipe from the upstream to the downstream without any trouble and preventing the backflow from the downstream to the upstream. Proposed.
The check valve joint provided with the check valve described in Patent Document 1 is a joint member used for a drainage pipe through which a fluid drainage passes, and is a joint member described below and a backflow prevention. It consists of a valve unit.
The joint body includes a pipe body portion that forms a fluid flow path, a connection portion provided at the upstream end portion and the downstream side end portion of the pipe body portion, a storage portion provided in the pipe body portion, and a side surface of the pipe portion. It consists of an opening that communicates with the storage portion provided in.
The check valve unit is composed of a valve body, a check valve unit body, and a lock member, which are described below.
The valve body is composed of a disk-shaped valve body portion and a valve shaft portion provided substantially perpendicular to the valve body portion.
The check valve unit main body is a substantially plate-shaped member having a lid portion on the side surface, and a packing is provided on the side surface of the lid portion, a drainage flow path is provided in the central portion, and a valve body portion is provided on the drainage flow path. The valve seat portion to be abutted is provided with a holding portion for holding and fixing the valve shaft portion at the center portion of the flow path. The holding portion is fixed at the center position of the flow path by extending two arm portions from the inner side surface of the flow path to the holding portion, and the two arm portions face each other with the holding portion as the center. They are arranged in a positional relationship.
The lock member is a disk-shaped member, which is rotatably attached to the lid portion of the check valve unit main body and has a rotary lock structure on the side surface thereof that fits with the opening of the joint member by rotation. Become.

上記逆流防止弁継手は、次のようにして排水用の配管上に施工されてなる。
継手本体の上端側の接続部を上流側の配管に、下端側の接続部を下流側の配管に、それぞれ接続する。
次に、継手本体の開口部から逆流防止弁ユニットを挿通し、蓋部分が開口を閉塞するようにして継手本体内に配置した上で、継手本体の開口部とロック部材を回転させて開口部を回転ロックにて閉塞することで、逆流防止弁ユニットが排水配管に施工される。
上流側から排水が行われた場合、排水は、上流側の配管から、継手本体内部に侵入し、弁本体内部に流入する。ある程度弁本体内、又はその上流の継手本体内に排水が溜まると、溜まった排水の圧力によって、弁体部が弾性変形して弁体部が弁座部から離間して流路が開口し、内部に溜まった排水が流出して、継手部材内を通過し、下流側の配管に排出される。
一方、下流側から排水が逆流した場合、弁本体と弁座部とは、逆流する排水の圧力により強く近接し、流路の閉塞を確実に行うため、排水は弁本体を通過することができず、排水の逆流が防止される。
また、逆流防止弁継手のメンテナンスや清掃が必要な場合は、ロック部材と開口部の回転ロックを解除し、逆流防止弁ユニットを取り出すことで、メンテナンスや清掃などを行うことができる。必要な作業が終了した後は、再び開口部から逆流防止弁ユニット本体を挿入し、ロック部材と開口部を回転ロックにて接続することで、支障なく排水配管を利用することができる。 The check valve joint is installed on the drainage pipe as follows.
Connect the connection on the upper end side of the joint body to the pipe on the upstream side, and connect the connection part on the lower end side to the pipe on the downstream side.
Next, the check valve unit is inserted through the opening of the joint body, placed in the joint body so that the lid portion closes the opening, and then the opening of the joint body and the lock member are rotated to open the opening. The check valve unit is installed in the drain pipe by closing the lock with a rotary lock.
When drainage is performed from the upstream side, the drainage invades the inside of the joint body from the piping on the upstream side and flows into the inside of the valve body. When drainage is accumulated in the valve body or the joint body upstream of the valve body to some extent, the valve body is elastically deformed by the pressure of the accumulated drainage, the valve body is separated from the valve seat, and the flow path is opened. The drainage accumulated inside flows out, passes through the joint member, and is discharged to the piping on the downstream side.
On the other hand, when the drainage flows back from the downstream side, the valve body and the valve seat portion are strongly close to each other due to the pressure of the backflowing drainage, and the flow path is surely blocked, so that the drainage can pass through the valve body. However, the backflow of drainage is prevented.
When maintenance or cleaning of the check valve joint is required, maintenance or cleaning can be performed by releasing the rotation lock of the lock member and the opening and taking out the check valve unit. After the necessary work is completed, the check valve unit main body is inserted again from the opening, and the lock member and the opening are connected by the rotary lock, so that the drainage pipe can be used without any trouble.

特開２０１９−１４８１２９号公報JP-A-2019-148129

上記したような特許文献１に記載の逆流防止弁は、弁本体を、ゴムやシリコン等の弾性材より構成している。これは、流路の開閉を、弁本体、特に弁体部の弾性変形によって行っているためであるが、ゴムやシリコン等の弾性材より成るため、金属材や硬質の樹脂に比べて使用や経年により劣化が生じやすい。劣化が生じると、当初弁体部が弁座部に対し適正な応力にて当接していたところ、応力が減少して、流体の圧力などによる応力が弱くても簡単に開口してしまったり、そもそも当接が正しく行われず、隙間が生じて閉塞ができなくなる場合がある。
しかし、経年劣化しても当接が正しく行われるように、使用開始時点において、強力な応力で弁体部が弁座部に当接するようにすると、使用開始時点では、流体の圧力による応力では簡単に開弁しない逆流防止弁となり、流路の上流側に排気・排水が溜まりやすい、処理性能の悪い逆流防止弁となってしまう。また、「どのように経年劣化するか」は劣化が起きるまで分からないため、当初から弁本体が弁座部に強く当接する構造としていても、経年劣化が起こった際に有効な当接状態となるとは限らない、という問題があった。
また、劣化した部材を交換することで上記問題を解決することも考えられるが、代替の部材を用意することは製造元や型番などの確認などに手間がかかる。また、上記のように、経年劣化によって問題が発生した場合、製品が施工されてから数年以上の時間が経過した上で問題が生じることが普通であり、該当製品の製造が既に終了しているなど、代替の部材を用意することができない場合も生じる。
本発明は上記問題点に鑑み発明されたものであって、逆流防止弁、特に開閉の為の構造に弾性素材など劣化しやすい素材を用いた逆流防止弁において、弾性素材部分などに経年劣化が生じても、良好に利用することが可能な逆流防止弁を提供するものである。 In the check valve described in Patent Document 1 as described above, the valve body is made of an elastic material such as rubber or silicon. This is because the flow path is opened and closed by elastic deformation of the valve body, especially the valve body, but since it is made of elastic material such as rubber or silicon, it can be used compared to metal materials and hard resins. Deterioration is likely to occur over time. When deterioration occurs, the valve body was initially in contact with the valve seat with appropriate stress, but the stress decreased, and even if the stress due to fluid pressure was weak, it could easily open. In the first place, the contact is not performed correctly, and a gap may be created so that the blockage cannot be performed.
However, if the valve body is brought into contact with the valve seat with strong stress at the start of use so that the contact is correct even if it deteriorates over time, the stress due to the pressure of the fluid at the start of use It becomes a check valve that does not open easily, and exhaust and drainage tend to collect on the upstream side of the flow path, resulting in a check valve with poor processing performance. In addition, since "how it deteriorates over time" is not known until deterioration occurs, even if the valve body has a structure that strongly contacts the valve seat from the beginning, it will be an effective contact state when deterioration over time occurs. There was a problem that it was not always the case.
Further, it is conceivable to solve the above problem by replacing the deteriorated member, but preparing a substitute member takes time and effort to confirm the manufacturer, model number, and the like. In addition, as described above, when a problem occurs due to deterioration over time, it is normal for the problem to occur after several years or more have passed since the product was installed, and the production of the product has already ended. In some cases, it may not be possible to prepare a substitute member.
The present invention has been invented in view of the above problems, and in a check valve, particularly a check valve using a material that easily deteriorates such as an elastic material for the structure for opening and closing, the elastic material portion and the like are deteriorated over time. It provides a check valve that can be used satisfactorily even if it occurs.

請求項１に記載の本発明は、流体の流路上に設けた弁座部と、該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、弁本体は、常時弁座部に当接して流路を閉塞し、上流側からの流体の応力によって弁本体が弁座部から離間することで流路を開口して流体を通過させる逆流防止弁において、
流体の応力が無くても弁本体が弁座部に当接しなくなった場合に、弁本体の弁座部に対する位置を調整することで、弁本体が弁座部に当接する状態に調整可能とする調整機構を備えたことを特徴とする逆流防止弁である。 The present invention according to claim 1 comprises a valve seat portion provided on a fluid flow path and a valve body that abuts on the valve seat portion to prevent the passage of fluid from the downstream side. Is a check valve that constantly contacts the valve seat to block the flow path and opens the flow path to allow the fluid to pass by separating the valve body from the valve seat due to the stress of the fluid from the upstream side.
When the valve body does not come into contact with the valve seat even if there is no fluid stress, the position of the valve body with respect to the valve seat can be adjusted so that the valve body comes into contact with the valve seat. It is a check valve characterized by having an adjustment mechanism.

請求項２に記載の本発明は、流体の流路上に設けた弁座部と、該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、弁本体は、常時弁座部に当接して流路を閉塞し、上流側からの流体の応力によって弁本体が弁座部から離間することで流路を開口して流体を通過させる逆流防止弁において、
弁本体が弁座部に当接する応力を調整することで、弁本体が弁座部から離間する際の流体の応力の大きさを調整可能とする調整機構を備えたことを特徴とする逆流防止弁である。 The present invention according to claim 2 comprises a valve seat portion provided on a fluid flow path and a valve body that abuts on the valve seat portion to prevent the passage of fluid from the downstream side. Is a check valve that constantly contacts the valve seat to block the flow path and opens the flow path to allow the fluid to pass by separating the valve body from the valve seat due to the stress of the fluid from the upstream side.
Backflow prevention is characterized by providing an adjustment mechanism that makes it possible to adjust the magnitude of the stress of the fluid when the valve body separates from the valve seat by adjusting the stress that the valve body contacts the valve seat. It is a valve.

請求項３に記載の本発明は、上記逆流防止弁について、
弁本体を、弁座部に当接する板状にして弾性を備えた弁体部、該弁体部に備えられた、弁座部に対して固定される弁軸部、から設けたことを特徴とする、請求項１または請求項２に記載の逆流防止弁である。 The present invention according to claim 3 relates to the check valve.
The valve body is characterized by being provided from a plate-shaped and elastic valve body portion that abuts on the valve seat portion, and a valve shaft portion that is provided on the valve body portion and is fixed to the valve seat portion. The check valve according to claim 1 or 2.

請求項４に記載の本発明は、上記逆流防止弁の調整機構を、逆流防止弁が配置された流路の外部から操作可能としたことを特徴とする、請求項１乃至請求項３のいずれか一つに記載の逆流防止弁である。 The present invention according to claim 4, wherein the adjusting mechanism of the check valve can be operated from the outside of the flow path in which the check valve is arranged, according to any one of claims 1 to 3. The check valve described in one of them.

請求項５に記載の本発明は、上記逆流防止弁を、筒状の管体部を備えた継手部材の内部に配置したことを特徴とする、請求項１乃至請求項４のいずれか一つに記載の逆流防止弁である。 The present invention according to claim 5 is any one of claims 1 to 4, wherein the check valve is arranged inside a joint member provided with a tubular tubular body portion. The check valve described in 1.

請求項６に記載の本発明は、上記逆流防止弁を、槽体又は床面の排水を行う排水口か、該排水口から連続した配管上に設けたことを特徴とする、請求項１乃至請求項５のいずれか一つに記載の逆流防止弁である。 The present invention according to claim 6 is characterized in that the check valve is provided on a drain port for draining the tank body or the floor surface, or on a pipe continuous from the drain port. The check valve according to any one of claims 5.

請求項１、請求項２に記載の発明では、逆流防止弁において、逆流防止弁の、弁本体が弁座部に当接する応力を調整する調整機構を備えたことで、経年劣化によって弁本体が弁座部に当接しがたくなり、隙間が生じて逆流防止ができなくなってしまうような場合に、調整機構に操作を行うことで、再び弁本体が弁座部に適正に当接し、また当接時の応力を強くすることで、弁本体が弁座部に確実に当接することができる。
これは、特に請求項３に記載の逆流防止弁のように、開閉の機構に弾性素材を用いたことで、経年劣化が生じやすい逆流防止弁において有効である。
請求項４に記載の本発明においては、調整機構の操作を、流路の外部から行うことができるようにしたことで、部材や配管の施工を分解等行うことなく、弁本体が弁座部に当接する応力を強くすることができる。
請求項５、請求項６に記載の本発明においては、逆流防止弁が配置される箇所を明確にすることができる。 According to the first and second aspects of the invention, the check valve is provided with an adjusting mechanism for adjusting the stress of the check valve in which the valve body abuts on the valve seat portion, so that the valve body is deteriorated over time. When it becomes difficult to contact the valve seat and a gap is created, backflow cannot be prevented. By operating the adjustment mechanism, the valve body can properly contact the valve seat again. By increasing the stress at the time of contact, the valve body can be reliably in contact with the valve seat portion.
This is particularly effective for a check valve that tends to deteriorate over time because an elastic material is used for the opening / closing mechanism, such as the check valve according to claim 3.
In the present invention according to claim 4, since the adjustment mechanism can be operated from the outside of the flow path, the valve body can be the valve seat portion without disassembling the members and piping. The stress in contact with the can be increased.
In the present invention according to claims 5 and 6, the location where the check valve is arranged can be clarified.

第一実施例の施工状態を示す断面図である。It is sectional drawing which shows the construction state of 1st Example. 図１の実施例の開口状態を示す断面図である。It is sectional drawing which shows the opening state of the Example of FIG. 第一実施例の、逆流防止弁ユニットを取り出した状態を示す断面図である。It is sectional drawing which shows the state which took out the check flow prevention valve unit of 1st Example. 第一実施例の部材構成を示す断面図である。It is sectional drawing which shows the member structure of 1st Example. 図１の逆流防止弁の、経年劣化した状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which the check valve of FIG. 1 has deteriorated over time. 図５の実施例の、調整機構を使用した後の状態を示す断面図である。It is sectional drawing which shows the state after using the adjustment mechanism of the Example of FIG. 第二実施例の施工状態を示す断面図である。It is sectional drawing which shows the construction state of the 2nd Example. 図７の逆流防止弁ユニットを示す断面図である。It is sectional drawing which shows the backflow prevention valve unit of FIG. 図８の逆流防止弁ユニットの開口状態を示す断面図である。It is sectional drawing which shows the opening state of the check valve unit of FIG. 第二実施例の部材構成を示す断面図である。It is sectional drawing which shows the member structure of 2nd Example. 図８の逆流防止弁の、経年劣化した状態を示す断面図である。FIG. 5 is a cross-sectional view showing a state in which the check valve of FIG. 8 has deteriorated over time. 図１１の実施例の、調整機構を使用した後の状態を示す断面図である。It is sectional drawing which shows the state after using the adjustment mechanism of the Example of FIG.

以下に、本発明の第一実施例を、図面を参照しつつ説明する。図１乃至図６に示した、本発明の第一実施例の逆流防止弁継手を採用した排水配管は、以下に記載する、継手本体１と、逆流防止弁ユニット２と、から構成されてなり、上流側の配管Ｐ及び下流側の配管Ｐに施工される。
継手本体１は、流体の流路を形成する直管状の管体部１ａと、管体部１ａ内部に備えられ上流側及び下流側の配管Ｐと連通する収納部１ｂと、管体部１ａの側面に設けられた収納部１ｂと連通する開口部１ｃと、からなる。
逆流防止弁ユニット２は、以下に記載する、弁本体５ａと、逆流防止弁ユニット本体３と、ロック部材６と、から構成されてなる。
弁本体５ａは、ゴムなど弾性素材からなり、その中央に嵌合用の穴部を設けた円盤状、即ち略板状の弁体部５ａと、硬質の棒状の部材であって、その外側面に雄ネジを螺刻すると共に、その端部に弁本体５ａの穴部と嵌合する嵌合部を備えてなり、使用時には弁軸部５ｂは弁体部５ａの中央から弁体部５ａに対して垂直となるように嵌合固定されて弁本体５ａを構成する。該弁本体５ａは、傘に似た形状となるため、一般的にはアンブレラ弁と呼ばれる形状である。
また弁軸部５ｂの側面の雄ネジを設けた部分以外の一部を、軸方向視非円形形状として構成している。この側面が取付口３ｆ内面に当接して回り止めとすることで、後述する第二の歯車Ｇ２を回転させた時に、第二の歯車Ｇ２と共に回転することが無いように構成されてなる。
逆流防止弁ユニット本体３は、側面に開口部１ｃを閉塞する円盤状の蓋部３ａを備えた、略筒状を成す部材であって、円筒状部分の上流側の面には収納部１ｂとの当接面を備え、この当接面と蓋部３ａの側面上にパッキングを備えてなる。
また筒状部分は排水の流路となる円形の通水路３ｅを形成すると共に、該通水路３ｅの下流側の面の周囲に弁座部３ｃを備えてなる。
また、弁座部３ｃには、その中央に、後述する第二の歯車Ｇ２を介して弁軸部５ｂが通水路３ｅの上流方向に向かって取り付けられる取付口３ｆを備えた保持部３ｄが備えられ、更に該保持部３ｄから通水路３ｅの内側面まで延出されるアーム部４が構成されてなる。尚、取付口３ｆ内面には、弁軸部５ｂの軸方向への進退は許容するが、回転は許容しないように、弁軸部５ｂの非円形部分に合致する形状の部分を形成してなる。
また、蓋部３ａには、その中央近傍から蓋部３ａの表裏を貫通する調整口３ｇが設けられてなる。
調整口３ｇの保持部３ｄ側端部には、交差軸歯車の一方である第一の歯車Ｇ１が配置されてなる。
交差軸歯車は、組み合わせた二つの歯車の回転軸が９０度の角度を成すように構成された歯車であって、本実施例では、円盤形状を成す蓋部３ａの中心軸を中心として回転する第一の歯車Ｇ１と、保持部３ｄの取付口３ｆの中心軸を中心として回転する第二の歯車Ｇ２と、をそれぞれ備えてなり、第一の歯車Ｇ１に回転操作を行うことで、第二の歯車Ｇ２が回転するように構成されている。
また、第一の歯車Ｇ１は、Ｏリングパッキン等を利用して、排水配管の外部から回転操作可能且つ排水配管の内外に対して水密的に取り付けられてなる。また、Ｏリングパッキンの摩擦により、第一の歯車Ｇ１は、上記した治具を利用した意図的な操作以外では回転等の動作が生じないように構成されてなる。このように構成することで、第一の歯車Ｇ１は、逆流防止弁ユニット２を継手本体１から取り外したりすることなく、調整口３ｇからドライバーなどの治具を利用して排水配管の外側、つまり流路の外側から回転操作を行うことが可能に構成されている。
また、第二の歯車Ｇ２は、内部に歯車の回転軸を中心とした円筒形状の貫通孔を設け、該貫通孔の内部に弁軸部５ｂの雄ネジと螺合する雌ネジが螺刻されている。施工完了時、第二の歯車Ｇ２は、保持部３ｄの取付口３ｆに回動自在且つ軸方向に移動不可能に取り付けられると共に、その内部の雌ネジは弁本体５ａの弁軸部５ｂの雄ネジと螺合している。前述のように、弁軸部５ｂは取付口３ｆに対して、軸方向に進退可能且つ回転は不可能に構成されており、これにより、第二の歯車Ｇ２が回転することで、弁軸部５ｂは取付口３ｆの軸方向に進退するように構成されている。
ロック部材６は、リング状を成す部材であって、逆流防止弁ユニット本体３の蓋部３ａに回動自在に取り付けられ、施工完了時継手本体１の開口部１ｃに回転ロックにより嵌合することで、継手本体１内部の収納部１ｂに逆流防止弁ユニット本体３の弁本体５ａや弁座部３ｃ部分等が収納され、また蓋部３ａが開口部１ｃを閉塞した状態を維持固定するように機能する。
尚、本実施例においては、弁座部３ｃ内の流路に上流側から流体、即ち排水の圧力が作用すると、弁本体５ａの弁体部５ａが弾性変形して弁座部３ｃから離間し、排水を通過させるように構成されてなる。
また、本実施例においては、上記継手本体１と逆流防止弁ユニット本体３は、透明な硬質の樹脂素材によって構成され、排水が無い状態であれば、配管の外側からであっても弁体部５ａと弁座部３ｃが離間しているかどうか、視認することができる。
また、施工現場などに搬入される前に、逆流防止弁ユニット本体３は、弁軸部５ｂを弁体部５ａに嵌合させて弁本体５ａとして組み立て、更に調整口３ｇの端部に第一の歯車Ｇ１を、取付口３ｆに第二の歯車Ｇ２を、それぞれ配置した上で、弁軸部５ｂを弁座部３ｃ側（下流側）から保持部３ｄの取付口３ｆに挿通し、更に弁軸部５ｂの雄ネジを第二の歯車Ｇ２の雌ネジに螺合させることで、弁本体５ａを第二の歯車Ｇ２を介して取付口３ｆに取り付けしてなる。また、ロック部材６を逆流防止弁ユニット本体３の蓋部３ａに回動自在に取り付けてなる。
このように構成したことで、本実施例においては、第一の歯車Ｇ１を調整口３ｇからドライバー等の治具を利用して回転操作することができ、第一の歯車Ｇ１の回転に応じて第二の歯車Ｇ２を回転させることができる。第二の歯車Ｇ２が回転しても、第二の歯車Ｇ２は軸方向に移動せず、また弁軸部５ｂは回転しないため、第二の歯車Ｇ２を回転させることで、弁軸部５ｂの雄ネジと第二の歯車Ｇ２の雌ネジの螺合により、弁本体５ａを弁軸部５ｂの軸方向に進退させることができる。
このようにして弁本体５ａの弁座部５ｂに対する位置を調整すると、弁本体５ａの弁体部５ａが、弁座部３ｃと当接する際の応力を変更し、調整することが可能となる。具体的には、弁体部５ａを弁座部３ｃの方向に移動させることで、弁本体５ａが弁座部３ｃから離間する際に流体の応力の大きさを大きなものとすることができる。
即ち、本実施例では、第一の歯車Ｇ１、第二の歯車Ｇ２、雄ネジ部を有する弁軸部５ｂ、及び弁軸部５ｂの供回りの回転を制限する取付口３ｆ等が、弁本体５ａの弁座部３ｃに対する位置を調整する調整機構であると共に、弁本体５ａの弁座部３ｃに対する当接の応力を調整する調整機構となる。
施工を行う際には、この位置及び応力の調整機構を利用し、弁本体が弁座部から離間する応力の大きさを、配管を流れる流体、本実施例では排水に合わせて適切な大きさとなるように調整しておく。 Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. The drainage pipe using the check valve joint of the first embodiment of the present invention shown in FIGS. 1 to 6 is composed of the joint body 1 and the check valve unit 2 described below. , It is installed on the upstream side pipe P and the downstream side pipe P.
The joint body 1 includes a straight tubular pipe body portion 1a forming a fluid flow path, a storage portion 1b provided inside the pipe body portion 1a and communicating with pipes P on the upstream side and the downstream side, and a pipe body portion 1a. It is composed of an opening 1c that communicates with a storage portion 1b provided on the side surface.
The check valve unit 2 is composed of a valve body 5a, a check valve unit body 3, and a lock member 6, which are described below.
The valve body 5a is made of an elastic material such as rubber, and has a disk-shaped or substantially plate-shaped valve body portion 5a having a fitting hole in the center thereof and a hard rod-shaped member on the outer surface thereof. A male screw is screwed, and a fitting portion that fits into the hole portion of the valve body 5a is provided at the end thereof. The valve body 5a is formed by fitting and fixing so as to be vertical. Since the valve body 5a has a shape similar to an umbrella, it generally has a shape called an umbrella valve.
Further, a part of the valve shaft portion 5b other than the portion provided with the male screw on the side surface is formed as an axially non-circular shape. Since this side surface abuts on the inner surface of the mounting port 3f to prevent rotation, it is configured so that when the second gear G2, which will be described later, is rotated, it does not rotate together with the second gear G2.
The check valve unit main body 3 is a substantially tubular member provided with a disk-shaped lid 3a that closes the opening 1c on the side surface, and has a storage portion 1b on the upstream surface of the cylindrical portion. The contact surface is provided, and packing is provided on the contact surface and the side surface of the lid portion 3a.
Further, the cylindrical portion forms a circular water passage 3e that serves as a drainage flow path, and is provided with a valve seat portion 3c around a surface on the downstream side of the water passage 3e.
Further, the valve seat portion 3c is provided with a holding portion 3d having a mounting port 3f in the center thereof, in which the valve shaft portion 5b is attached toward the upstream direction of the water passage 3e via the second gear G2 described later. Further, an arm portion 4 extending from the holding portion 3d to the inner surface of the water passage 3e is configured. The inner surface of the mounting port 3f is formed with a portion having a shape that matches the non-circular portion of the valve shaft portion 5b so that the valve shaft portion 5b is allowed to move forward and backward in the axial direction but is not allowed to rotate. ..
Further, the lid portion 3a is provided with an adjusting port 3g that penetrates the front and back surfaces of the lid portion 3a from the vicinity of the center thereof.
The first gear G1, which is one of the cross-shaft gears, is arranged at the end on the holding portion 3d side of the adjusting port 3g.
The cross-axis gear is a gear configured such that the rotation axes of the two combined gears form an angle of 90 degrees, and in this embodiment, it rotates about the central axis of the disk-shaped lid portion 3a. A first gear G1 and a second gear G2 that rotates about the central axis of the mounting port 3f of the holding portion 3d are provided, respectively, and the first gear G1 is rotated to perform a second gear G1. Gear G2 is configured to rotate.
Further, the first gear G1 can be rotated from the outside of the drainage pipe by using an O-ring packing or the like, and is watertightly attached to the inside and outside of the drainage pipe. Further, due to the friction of the O-ring packing, the first gear G1 is configured so that an operation such as rotation does not occur except for an intentional operation using the jig described above. With this configuration, the first gear G1 uses a jig such as a driver from the adjustment port 3g to the outside of the drainage pipe, that is, without removing the check valve unit 2 from the joint body 1. It is configured so that the rotation operation can be performed from the outside of the flow path.
Further, the second gear G2 is provided with a cylindrical through hole centered on the rotation shaft of the gear inside, and a female screw to be screwed with the male screw of the valve shaft portion 5b is screwed inside the through hole. ing. When the construction is completed, the second gear G2 is rotatably and non-movably attached to the attachment port 3f of the holding portion 3d, and the female screw inside the second gear G2 is the male of the valve shaft portion 5b of the valve body 5a. It is screwed with a screw. As described above, the valve shaft portion 5b is configured so that it can move forward and backward in the axial direction and cannot rotate with respect to the mounting port 3f, whereby the second gear G2 rotates to cause the valve shaft portion to rotate. 5b is configured to advance and retreat in the axial direction of the mounting port 3f.
The lock member 6 is a ring-shaped member that is rotatably attached to the lid portion 3a of the check valve unit main body 3 and is fitted to the opening 1c of the joint main body 1 by a rotary lock when the construction is completed. Then, the valve body 5a of the check valve unit body 3 and the valve seat 3c portion are housed in the storage portion 1b inside the joint body 1, and the lid portion 3a maintains and fixes the opening 1c. Function.
In this embodiment, when a fluid, that is, drainage pressure acts on the flow path in the valve seat portion 3c from the upstream side, the valve body portion 5a of the valve body 5a is elastically deformed and separated from the valve seat portion 3c. , It is configured to allow drainage to pass through.
Further, in this embodiment, the joint body 1 and the check valve unit body 3 are made of a transparent hard resin material, and if there is no drainage, the valve body portion even from the outside of the pipe. Whether or not 5a and the valve seat portion 3c are separated from each other can be visually recognized.
Further, before being carried into a construction site or the like, the check valve unit main body 3 is assembled as a valve main body 5a by fitting the valve shaft portion 5b to the valve body portion 5a, and further, the first is at the end of the adjustment port 3g. After arranging the gear G1 of the above and the second gear G2 in the mounting port 3f, the valve shaft portion 5b is inserted from the valve seat portion 3c side (downstream side) into the mounting port 3f of the holding portion 3d, and the valve is further inserted. By screwing the male screw of the shaft portion 5b into the female screw of the second gear G2, the valve body 5a is attached to the mounting port 3f via the second gear G2. Further, the lock member 6 is rotatably attached to the lid portion 3a of the check valve unit main body 3.
With this configuration, in this embodiment, the first gear G1 can be rotated from the adjustment port 3g using a jig such as a driver, and the first gear G1 can be rotated according to the rotation of the first gear G1. The second gear G2 can be rotated. Even if the second gear G2 rotates, the second gear G2 does not move in the axial direction and the valve shaft portion 5b does not rotate. Therefore, by rotating the second gear G2, the valve shaft portion 5b By screwing the male screw and the female screw of the second gear G2, the valve body 5a can be moved forward and backward in the axial direction of the valve shaft portion 5b.
By adjusting the position of the valve body 5a with respect to the valve seat portion 5b in this way, it is possible to change and adjust the stress when the valve body portion 5a of the valve body 5a comes into contact with the valve seat portion 3c. Specifically, by moving the valve body portion 5a in the direction of the valve seat portion 3c, the magnitude of the stress of the fluid can be increased when the valve body portion 5a is separated from the valve seat portion 3c.
That is, in this embodiment, the first gear G1, the second gear G2, the valve shaft portion 5b having the male screw portion, the mounting port 3f that limits the rotation of the valve shaft portion 5b, and the like are the valve main body. It is an adjustment mechanism that adjusts the position of the valve seat portion 3c of 5a with respect to the valve seat portion 3c, and also serves as an adjustment mechanism that adjusts the stress of contact of the valve body 5a with respect to the valve seat portion 3c.
When performing construction, this position and stress adjustment mechanism is used to set the magnitude of the stress that separates the valve body from the valve seat to an appropriate magnitude according to the fluid flowing through the pipe and the drainage in this embodiment. Adjust so that

上記逆流防止弁は、次のようにして排水用の配管上に施工されてなる。
継手本体１の上端を上流側の配管Ｐに、下端を下流側の配管Ｐに、それぞれ接続する。
次に、継手本体１の開口部１ｃから逆流防止弁ユニット２の逆流防止弁部分（弁本体５ａ及び弁座部３ｃの部分）を挿通し、継手本体１内に弁本体５ａ、及び弁座部３ｃを配置した上で、継手本体１の開口部１ｃを蓋部３ａで閉塞し、更にロック部材６と開口部１ｃとを回転ロックにて嵌合させ閉塞することで、逆流防止弁が排水配管に施工される。 The check valve is installed on the drainage pipe as follows.
The upper end of the joint body 1 is connected to the upstream pipe P, and the lower end is connected to the downstream pipe P.
Next, the check valve portion (the portion of the valve body 5a and the valve seat portion 3c) of the check flow prevention valve unit 2 is inserted through the opening 1c of the joint body 1, and the valve body 5a and the valve seat portion are inserted into the joint body 1. After arranging 3c, the opening 1c of the joint body 1 is closed by the lid 3a, and the lock member 6 and the opening 1c are fitted and closed by the rotary lock, so that the check valve is a drain pipe. Will be constructed in.

上記のように構成された逆流防止弁を備えた逆流防止弁継手は、排水が無い場合、図１のように、弁本体５ａが弁座部３ｃに当接して排水の流路を閉塞した状態となる。
この排水配管において、下流側から排水が逆流した場合、弁体部５ａと弁座部３ｃの当接は、下流側から逆流水の水圧が加えられることによってより近接し、流路の閉塞を確実に行うため、排水は逆流防止弁を通過することができず、排水の逆流が防止される。また、排水が無い状態でも弁体部５ａと弁座部３ｃとが当接しているため、下流側からの臭気や害虫類などが上流側に逆流することを防止することができる。 In the check valve joint provided with the check valve configured as described above, when there is no drainage, the valve body 5a abuts on the valve seat portion 3c to block the drainage flow path as shown in FIG. It becomes.
In this drainage pipe, when drainage flows backward from the downstream side, the contact between the valve body portion 5a and the valve seat portion 3c becomes closer due to the application of the water pressure of the backflow water from the downstream side, and the flow path is surely blocked. Therefore, the drainage cannot pass through the check valve, and the backflow of the drainage is prevented. Further, since the valve body portion 5a and the valve seat portion 3c are in contact with each other even when there is no drainage, it is possible to prevent odors and pests from the downstream side from flowing back to the upstream side.

上流側から排水が行われた場合、排水は、上流側の配管Ｐから、継手本体１内部に侵入し、逆流防止弁ユニット本体３の通水路３ｅ上であって、弁体部５ａ上に流入する。ある程度逆流防止弁ユニット本体３の通水路３ｅ上や、弁本体５ａよりも上流の継手本体１内に排水が溜まると、溜まった排水の圧力によって、図２のように、弁体部５ａが弾性変形して弁座部３ｃから離間することで、排水の流路が開口し、逆流防止弁ユニット本体３や継手本体１内部に溜まった排水が流出して、逆流防止弁ユニット本体３の通水路３ｅを通過し、下流側の配管Ｐに排出される。
排水が完了すると、弁体部５ａの弾性によって弁体部５ａが図１の形状に復帰し、弁体部５ａが再び弁座部３ｃに当接して、排水の流路が閉塞される。 When drainage is performed from the upstream side, the drainage enters the inside of the joint body 1 from the pipe P on the upstream side, and flows into the water passage 3e of the check valve unit body 3 and onto the valve body portion 5a. do. When drainage is accumulated to some extent on the water passage 3e of the check valve unit main body 3 or in the joint main body 1 upstream of the valve main body 5a, the valve body portion 5a is elastic as shown in FIG. 2 due to the pressure of the accumulated drainage. By deforming and separating from the valve seat portion 3c, the drainage flow path opens, and the drainage accumulated inside the check valve unit main body 3 and the joint main body 1 flows out, and the water passage of the check flow prevention valve unit main body 3 It passes through 3e and is discharged to the pipe P on the downstream side.
When the drainage is completed, the elasticity of the valve body 5a causes the valve body 5a to return to the shape shown in FIG. 1, the valve body 5a comes into contact with the valve seat 3c again, and the drainage flow path is blocked.

上記逆流防止弁継手において、メンテナンスや清掃が必要な場合は、ロック部材６と開口部１ｃとの回転ロックを解除し、図３のように、逆流防止弁ユニット２を取り出すことで、メンテナンスや清掃などを行うことができる。必要な作業が終了した後は、再び開口部１ｃから逆流防止弁ユニット本体３を挿入し、ロック部材６と開口部１ｃを回転ロックにて接続することで、支障なく排水配管を利用することができる。 When maintenance or cleaning is required for the check valve joint, the rotation lock between the lock member 6 and the opening 1c is released, and the check valve unit 2 is taken out as shown in FIG. 3, for maintenance and cleaning. And so on. After the necessary work is completed, the check valve unit main body 3 is inserted again from the opening 1c, and the lock member 6 and the opening 1c are connected by a rotary lock so that the drainage pipe can be used without any trouble. can.

弁体部５ａの素材に影響を与える洗剤成分が排水に混入していたり、経年などの理由によって、弾性素材からなる弁体部５ａが劣化すると、図５に示したように、弁体部５ａが反り返るなどして弁体部５ａと弁座部３ｃが離間してしまう場合がある。前述の通り、継手本体１と逆流防止弁ユニット本体３は透明な硬質の樹脂素材によって構成されているため、配管の外部から逆流防止弁継手内部を視認することができる。配管の外部から逆流防止弁継手内部を視認することにより、弁体部５ａと弁座部３ｃが劣化などの理由で離間していることを確認した場合、第一の歯車Ｇ１を調整口３ｇからドライバー等の治具を利用して回転操作することで第二の歯車Ｇ２を回転させ、第二の歯車Ｇ２の雌ネジと弁軸部５ｂの雄ネジの螺合を行うことで、弁軸部５ｂの移動に伴い、弁体部５ａを弁座部３ｃの方向に移動させることによって、図６に示したように、弁体部５ａと弁座部３ｃを再び確実に当接させることができる。第一の歯車Ｇ１は配管の外部から調整口３ｇを介して回転操作することができ、また弁体部５ａと弁座部３ｃの当接が正しく行われたかどうかの確認は配管の外部から視認することができるため、上記の弁本体５ａ（又は弁体部５ａ）の位置調整の作業は、全て配管の外部からの操作によって行うことができる。尚、第一の歯車Ｇ１は、Ｏリングパッキンの摩擦によって意図的な操作以外では回転することが無く、これによりこの第一の歯車Ｇ１に歯合している第二の歯車Ｇ２も回動できないため、排水の応力を受けて弁軸部５ｂが弁座部３ｃに対して勝手に移動してしまう、ということは無い。 As shown in FIG. 5, when the valve body portion 5a made of an elastic material deteriorates due to a detergent component that affects the material of the valve body portion 5a being mixed in the wastewater or due to aging or the like, the valve body portion 5a May warp and the valve body portion 5a and the valve seat portion 3c may be separated from each other. As described above, since the joint body 1 and the check valve unit body 3 are made of a transparent hard resin material, the inside of the check valve joint can be visually recognized from the outside of the pipe. When it is confirmed by visually recognizing the inside of the check valve joint from the outside of the pipe that the valve body portion 5a and the valve seat portion 3c are separated due to deterioration or the like, the first gear G1 is adjusted from the adjustment port 3g. The second gear G2 is rotated by rotating it using a jig such as a screwdriver, and the female screw of the second gear G2 and the male screw of the valve shaft 5b are screwed to rotate the valve shaft. By moving the valve body portion 5a in the direction of the valve seat portion 3c with the movement of the valve body portion 5b, as shown in FIG. 6, the valve body portion 5a and the valve seat portion 3c can be reliably brought into contact with each other again. .. The first gear G1 can be rotated from the outside of the pipe via the adjustment port 3g, and it can be visually confirmed from the outside of the pipe whether or not the valve body portion 5a and the valve seat portion 3c are properly brought into contact with each other. Therefore, all the work of adjusting the position of the valve body 5a (or the valve body portion 5a) can be performed by operating the pipe from the outside. The first gear G1 does not rotate except for an intentional operation due to the friction of the O-ring packing, so that the second gear G2 meshing with the first gear G1 cannot rotate. Therefore, the valve shaft portion 5b does not move freely with respect to the valve seat portion 3c due to the stress of the drainage.

尚、上記説明では、弁本体５ａと弁座部３ｃの位置の調整、及び当接の応力の調整を、全て配管外から行っているが、視認性や作業のやり易さ等の理由によって、逆流防止弁ユニット２を継手本体１から取り出した上で調整作業を行っても構わない。 In the above description, the positions of the valve body 5a and the valve seat 3c and the contact stress are all adjusted from outside the pipe, but due to reasons such as visibility and ease of work, The check valve unit 2 may be taken out from the joint body 1 and then adjusted.

次に、本発明の第二実施例を、図面を参照しつつ説明する。図７乃至図１２に示した、本発明の第二実施例の逆流防止弁を採用した排水配管は、トイレ室の床面等、建物内において、使用や洗浄などの際に排水が頻繁に生じる床面に設けられる排水口に関するものであって、以下に記載する、床排水口７と、逆流防止弁ユニット２と、床下の配管Ｐと、から構成されてなる。
床排水口７は、床面に設けられた開口であって、その内部に逆流防止弁ユニット２を着脱自在に接続できるよう構成されてなる。
床下の配管Ｐは、図７に示したように、床下空間において施工された排水配管であって、若干の下り勾配を備えて横方向に向かって配置された管体と、その端部において上方に向かって屈曲したエルボ管とからなり、該エルボ管の上端は、床排水口７の下端に接続されてなる。
逆流防止弁ユニット２は、以下に記載する弁本体５ａ、逆流防止弁ユニット本体３から構成される。
弁本体５ａは、ゴムなど弾性素材からなり、その中央に嵌合用の穴部を設けた円盤状、即ち略板状の弁体部５ａと、硬質の棒状の部材であって、その外側面に雄ネジを螺刻すると共に、その端部に弁本体の穴部と嵌合する嵌合部を備えてなり、使用時には弁軸部５ｂは弁体部５ａの中央から弁体部５ａに対して垂直となるように嵌合固定されて弁本体５ａを構成する。該弁本体５ａは、傘に似た形状となるため、一般的にはアンブレラ弁と呼ばれる形状である。
また弁軸部５ｂの側面の雄ネジを設けた部分以外の一部を、軸方向視非円形形状として構成している。この側面が取付口３ｆ内面に当接して回り止めとすることで、後述するナット部材Ｎを回転させた時に、ナット部材Ｎと共に回転することが無いように構成されてなる。
逆流防止弁ユニット本体３は、略円筒形状を成す部材であって、その内部は排水の流路となる円形の通水路３ｅを備えると共に、該通水路３ｅの下流側の面の周囲に弁座部３ｃを備えてなる。
また、弁座部３ｃには、その中央に、弁軸部５ｂが通水路３ｅの上流方向に向かって挿通される取付口３ｆを備えた保持部３ｄが備えられ、更に該保持部３ｄから通水路３ｅの内側面まで延出されるアーム部４が構成されてなる。
また、取付口３ｆの端部には、内部に弁軸部５ｂの雄ネジと螺合する雌ネジが設けられたナット部材Ｎと、ナット部材Ｎを回動不能な状態に覆うキャップ部材Ｃが備えられてなる。
尚、ナット部材Ｎは、取付口３ｆに対して、軸方向へは移動不可とすると共に、手動操作によって回転することは可能に構成されてなる。また、キャップ部材Ｃは作業終了後にナット部材Ｎを覆うことで、ナット部材Ｎを回転不能に固定する。
使用時において、床排水口７に接続された逆流防止弁ユニット２は、逆流防止弁ユニット本体３の外側面が、床排水口７の内側面に水密的に接続されるように構成されてなる。 Next, a second embodiment of the present invention will be described with reference to the drawings. The drainage pipe using the check valve of the second embodiment of the present invention shown in FIGS. 7 to 12 frequently drains water during use or cleaning in a building such as the floor of a toilet room. It relates to a drainage port provided on the floor surface, and is composed of a floor drainage port 7, a check valve unit 2 and an underfloor pipe P described below.
The floor drainage port 7 is an opening provided on the floor surface, and is configured so that the check valve unit 2 can be detachably connected to the inside thereof.
As shown in FIG. 7, the underfloor pipe P is a drainage pipe constructed in the underfloor space, and is a pipe body arranged laterally with a slight downward slope and an upper portion at the end thereof. It is composed of an elbow pipe that bends toward, and the upper end of the elbow pipe is connected to the lower end of the floor drainage port 7.
The check valve unit 2 is composed of the valve body 5a and the check valve unit body 3 described below.
The valve body 5a is made of an elastic material such as rubber, and has a disk-shaped or substantially plate-shaped valve body portion 5a having a fitting hole in the center thereof and a hard rod-shaped member on the outer surface thereof. A male screw is screwed, and a fitting portion that fits into the hole of the valve body is provided at the end thereof. The valve body 5a is formed by fitting and fixing so as to be vertical. Since the valve body 5a has a shape similar to an umbrella, it generally has a shape called an umbrella valve.
Further, a part of the valve shaft portion 5b other than the portion provided with the male screw on the side surface is formed as an axially non-circular shape. By contacting the side surface with the inner surface of the mounting port 3f to prevent rotation, the nut member N, which will be described later, is configured so as not to rotate together with the nut member N when the nut member N is rotated.
The check valve unit main body 3 is a member having a substantially cylindrical shape, and the inside thereof is provided with a circular water passage 3e that serves as a drainage flow path, and a valve seat is provided around a surface on the downstream side of the water passage 3e. A part 3c is provided.
Further, the valve seat portion 3c is provided with a holding portion 3d having a mounting port 3f through which the valve shaft portion 5b is inserted toward the upstream direction of the water passage 3e in the center thereof, and further passes through the holding portion 3d. An arm portion 4 extending to the inner surface of the water channel 3e is configured.
Further, at the end of the mounting port 3f, a nut member N provided with a female screw screwed with a male screw of the valve shaft portion 5b inside, and a cap member C that covers the nut member N in a non-rotatable state. Be prepared.
The nut member N is configured so that it cannot move in the axial direction with respect to the mounting port 3f and can be rotated by a manual operation. Further, the cap member C covers the nut member N after the work is completed, thereby fixing the nut member N so as not to rotate.
At the time of use, the check valve unit 2 connected to the floor drain port 7 is configured such that the outer surface of the check valve unit main body 3 is watertightly connected to the inner surface of the floor drain port 7. ..

本実施例においては、キャップ部材Ｃを外した上で、ナット部材Ｎを回転させることで、弁軸部５ｂの雄ネジとナット部材Ｎの雌ネジの螺合により、弁本体５ａを弁軸部５ｂの軸方向に進退させることができる。
このようにして弁本体５ａの弁座部５ｂに対する位置を調整すると、弁本体５ａの弁体部５ａが、弁座部３ｃと当接する際の応力を変更し、調整することが可能となる。具体的には、弁体部５ａを弁座部３ｃの方向に移動させることで、弁本体５ａが弁座部３ｃから離間する際の流体の応力の大きさを大きなものとすることができる。
即ち、本実施例では、ナット部材Ｎ、雄ネジ部を有する弁軸部５ｂ、及び弁軸部５ｂの供回りの回転を制限する取付口３ｆ等が、弁本体５ａの弁座部３ｃに対する位置を調整する調整機構であると共に、弁本体５ａの弁座部３ｃに対する当接の応力を調整する調整機構となる。
施工を行う際には、この位置及び応力の調整機構を利用し、弁本体５ａが弁座部５ｂから離間する応力の大きさを、配管を流れる流体、本実施例では排水に合わせて適切な大きさとなるように調整しておく。 In this embodiment, by removing the cap member C and rotating the nut member N, the valve shaft portion 5a is screwed by the male screw of the valve shaft portion 5b and the female screw of the nut member N. It can be moved back and forth in the axial direction of 5b.
By adjusting the position of the valve body 5a with respect to the valve seat portion 5b in this way, it is possible to change and adjust the stress when the valve body portion 5a of the valve body 5a comes into contact with the valve seat portion 3c. Specifically, by moving the valve body portion 5a in the direction of the valve seat portion 3c, the magnitude of the stress of the fluid when the valve body 5a separates from the valve seat portion 3c can be increased.
That is, in this embodiment, the nut member N, the valve shaft portion 5b having the male screw portion, the mounting port 3f that limits the rotation of the valve shaft portion 5b, and the like are located at positions of the valve body 5a with respect to the valve seat portion 3c. It is an adjustment mechanism that adjusts the stress of contact of the valve body 5a with respect to the valve seat portion 3c.
When performing construction, this position and stress adjustment mechanism is used, and the magnitude of the stress that separates the valve body 5a from the valve seat 5b is appropriate for the fluid flowing through the pipe and the drainage in this embodiment. Adjust so that it is the size.

上記のように構成された床面と床下配管において、排水が無い場合、図７、又は図８のように、床排水口７内の弁本体５ａが弁座部３ｃに当接して排水の流路を閉塞した状態となる。
床下の配管Ｐの下流側から排水が逆流した場合、弁体部５ａと弁座部３ｃの当接は、下流側から逆流水の水圧が加えられることによってより近接し、流路の閉塞を確実に行うため、排水は逆流防止弁を通過することができず、排水の逆流が防止される。また、排水が無い状態でも弁体部５ａと弁座部３ｃとが当接しているため、下流側からの臭気や害虫類などが上流側に逆流することを防止することができる。 When there is no drainage in the floor surface and the underfloor piping configured as described above, as shown in FIG. 7 or 8, the valve body 5a in the floor drainage port 7 comes into contact with the valve seat portion 3c and the drainage flow. The road is blocked.
When drainage flows back from the downstream side of the pipe P under the floor, the contact between the valve body portion 5a and the valve seat portion 3c becomes closer due to the application of the water pressure of the backflow water from the downstream side, and the flow path is surely blocked. Therefore, the drainage cannot pass through the check valve, and the backflow of the drainage is prevented. Further, since the valve body portion 5a and the valve seat portion 3c are in contact with each other even when there is no drainage, it is possible to prevent odors and pests from the downstream side from flowing back to the upstream side.

清掃などによって床面上に排水が生じると、排水は床面上から床排水口７内に流入する。このようにして床排水口７内に排水が行われた場合、排水は、逆流防止弁ユニット本体３の通水路３ｅ上であって、弁体部５ａ上に流入する。ある程度、弁本体５ａよりも上流の通水路３ａ内に排水が溜まると、溜まった排水の圧力によって、図９のように、弁体部５ａが弾性変形して弁座部３ｃから離間する方向に変形して排水の流路が開口し、逆流防止弁ユニット本体３や継手本体１内部に溜まった排水が流出され、逆流防止弁ユニット本体３の通水路３ｅを通過し、下流側の配管Ｐに排出される。
排水が完了すると、排水の水圧が解消して、弁体部５ａが弾性により元の形状に戻り、弁体部５ａが再び弁座部３ｃに当接して、排水の流路が閉塞される。 When drainage is generated on the floor surface due to cleaning or the like, the drainage flows into the floor drainage port 7 from above the floor surface. When drainage is performed in the floor drain port 7 in this way, the drainage flows into the water passage 3e of the check valve unit main body 3 and onto the valve body portion 5a. When drainage is accumulated in the water passage 3a upstream of the valve body 5a to some extent, the valve body portion 5a is elastically deformed due to the pressure of the accumulated drainage and is separated from the valve seat portion 3c as shown in FIG. The drainage flow path is deformed and opened, and the drainage collected inside the check valve unit main body 3 and the joint main body 1 flows out, passes through the water passage 3e of the check flow prevention valve unit main body 3, and reaches the pipe P on the downstream side. It is discharged.
When the drainage is completed, the water pressure of the drainage is released, the valve body portion 5a elastically returns to the original shape, the valve body portion 5a comes into contact with the valve seat portion 3c again, and the drainage flow path is blocked.

上記逆流防止弁継手において、メンテナンスや清掃が必要な場合は、床排水口７から逆流防止弁ユニット２との接続を解除し、逆流防止弁ユニット２を取り出すことで、メンテナンスや清掃などを行うことができる。必要な作業が終了した後は、再び床排水口７から逆流防止弁ユニット２を接続する。 If maintenance or cleaning is required for the check valve joint, maintenance or cleaning should be performed by disconnecting the check valve unit 2 from the floor drain port 7 and taking out the check valve unit 2. Can be done. After the necessary work is completed, the check valve unit 2 is connected again from the floor drain port 7.

弁体部５ａの素材に影響を与える洗剤成分が排水に混入していたり、経年などの理由によって、弾性素材からなる弁体部５ａが劣化すると、図１１に示したように、弁体部５ａが反り返るなどして弁体部５ａと弁座部３ｃが離間してしまう場合がある。このような場合、逆流防止ユニット２を床排水口７より取り出し、キャップ部材Ｃを外して、ナット部材Ｎを回転させて、弁体部５ａを弁座部３ｃの方向に移動させることによって、図１２に示したように、弁体部５ａと弁座部３ｃを再び確実に当接させることができる。弁本体５ａの位置を移動させる調整作業が終了した後は、再びキャップ部材Ｃにてナット部材Ｎを覆い、ナット部材Ｎを意図的な操作以外では回転することが無いようにした上で、逆流防止ユニット２を床排水口７に接続する。上記のように、キャップ部材Ｃによってナット部材Ｎは覆われているため、排水の応力を受けて弁軸部５ｂが弁座部３ｃに対して勝手に移動してしまう、ということは無い。 As shown in FIG. 11, when the valve body portion 5a made of an elastic material deteriorates due to a detergent component that affects the material of the valve body portion 5a being mixed in the wastewater or due to aging or the like, the valve body portion 5a May warp and the valve body portion 5a and the valve seat portion 3c may be separated from each other. In such a case, the backflow prevention unit 2 is taken out from the floor drain port 7, the cap member C is removed, the nut member N is rotated, and the valve body portion 5a is moved in the direction of the valve seat portion 3c. As shown in FIG. 12, the valve body portion 5a and the valve seat portion 3c can be reliably brought into contact with each other again. After the adjustment work for moving the position of the valve body 5a is completed, the nut member N is covered with the cap member C again so that the nut member N does not rotate except for intentional operation, and then backflow occurs. The prevention unit 2 is connected to the floor drain port 7. As described above, since the nut member N is covered by the cap member C, the valve shaft portion 5b does not move arbitrarily with respect to the valve seat portion 3c due to the stress of drainage.

本発明の実施例は上記のようであるが、本発明は上記実施例に限定されるものでは無く、発明の主旨を変更しない範囲で自由に変更が可能である。
例えば、上記実施例では、逆流防止弁を採用する部分として、配管中の排水継手、また床排水口とその排水配管を記載してなるが、本発明は上記実施例に限定されるものではなく、槽体の底面に設けた排水口に備えられる逆流防止弁としても良い。槽体としては、流し台のシンク、洗面台の洗面ボウル、または浴室の防水パン等の槽体が考えられる。また液体に限定せず、流体である気体の配管に採用しても良い。 Examples of the present invention are as described above, but the present invention is not limited to the above examples, and can be freely changed without changing the gist of the invention.
For example, in the above embodiment, the drainage joint in the pipe, the floor drainage port and the drainage pipe thereof are described as the portion where the check valve is adopted, but the present invention is not limited to the above embodiment. , It may be used as a check valve provided in the drain port provided on the bottom surface of the tank body. As the tank body, a sink of a sink, a wash bowl of a washbasin, or a tank body such as a waterproof pan in a bathroom can be considered. Further, the pipe is not limited to a liquid, and may be used for piping of a gas which is a fluid.

１ 継手本体
１ａ 管体部
１ｂ 収納部
１ｃ 開口部
２ 逆流防止弁ユニット
３ 逆流防止弁ユニット本体
３ａ 蓋部
３ｂ 筒部分
３ｃ 弁座部
３ｄ 保持部
３ｅ 通水路
３ｆ 取付口
３ｇ 調整口
４ アーム部
５ 弁本体
５ａ 弁体部
５ｂ 弁軸部
６ ロック部材
７ 床排水口
Ｐ 配管
Ｃ キャップ部材
Ｇ１ 第一の歯車
Ｇ２ 第二の歯車
Ｎ ナット部材 1 Joint body 1a Pipe body 1b Storage part 1c Opening 2 Backflow prevention valve unit 3 Backflow prevention valve unit body 3a Lid part 3b Cylinder part 3c Valve seat part 3d Holding part 3e Water passage 3f Mounting port 3g Adjustment port 4 Arm part 5 Valve body 5a Valve body 5b Valve shaft 6 Lock member 7 Floor drain P Piping C Cap member G1 First gear G2 Second gear N Nut member

Claims (6)

流体の流路上に設けた弁座部と、
該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、
弁本体は、常時弁座部に当接して流路を閉塞し、上流側からの流体の応力によって弁本体が弁座部から離間することで流路を開口して流体を通過させる逆流防止弁において、
流体の応力が無くても弁本体が弁座部に当接しなくなった場合に、弁本体の弁座部に対する位置を調整することで、弁本体が弁座部に当接する状態に調整可能とする調整機構を備えたことを特徴とする逆流防止弁。 A valve seat provided on the fluid flow path and
It consists of a valve body that prevents fluid from passing from the downstream side by contacting the valve seat portion.
The valve body always abuts on the valve seat to block the flow path, and the valve body separates from the valve seat due to the stress of the fluid from the upstream side to open the flow path and allow the fluid to pass through. In
When the valve body does not come into contact with the valve seat even if there is no fluid stress, the position of the valve body with respect to the valve seat can be adjusted so that the valve body comes into contact with the valve seat. A check valve characterized by having an adjustment mechanism. 流体の流路上に設けた弁座部と、
該弁座部に当接することで下流側からの流体の通過を防止する弁本体と、からなり、
弁本体は、常時弁座部に当接して流路を閉塞し、上流側からの流体の応力によって弁本体が弁座部から離間することで流路を開口して流体を通過させる逆流防止弁において、
弁本体が弁座部に当接する応力を調整することで、
弁本体が弁座部から離間する際の流体の応力の大きさを調整可能とする調整機構を備えたことを特徴とする逆流防止弁。 A valve seat provided on the fluid flow path and
It consists of a valve body that prevents fluid from passing from the downstream side by contacting the valve seat portion.
The valve body always abuts on the valve seat to block the flow path, and the valve body separates from the valve seat due to the stress of the fluid from the upstream side to open the flow path and allow the fluid to pass through. In
By adjusting the stress that the valve body abuts on the valve seat,
A check valve characterized in that it is equipped with an adjustment mechanism that makes it possible to adjust the magnitude of stress of the fluid when the valve body separates from the valve seat. 上記逆流防止弁について、
弁本体を、弁座部に当接する板状にして弾性を備えた弁体部、該弁体部に備えられた、弁座部に対して固定される弁軸部、から設けたことを特徴とする、請求項１または請求項２に記載の逆流防止弁。 About the above check valve
The valve body is characterized by being provided from a plate-shaped and elastic valve body portion that abuts on the valve seat portion, and a valve shaft portion that is provided on the valve body portion and is fixed to the valve seat portion. The check valve according to claim 1 or 2. 上記逆流防止弁の調整機構を、逆流防止弁が配置された流路の外部から操作可能としたことを特徴とする、請求項１乃至請求項３のいずれか一つに記載の逆流防止弁。 The check valve according to any one of claims 1 to 3, wherein the adjusting mechanism of the check valve can be operated from the outside of the flow path in which the check valve is arranged. 上記逆流防止弁を、筒状の管体部を備えた継手部材の内部に配置したことを特徴とする、請求項１乃至請求項４のいずれか一つに記載の逆流防止弁。 The check valve according to any one of claims 1 to 4, wherein the check valve is arranged inside a joint member provided with a tubular tubular body portion. 上記逆流防止弁を、槽体又は床面の排水を行う排水口か、該排水口から連続した配管上に設けたことを特徴とする、請求項１乃至請求項５のいずれか一つに記載の逆流防止弁。 The method according to any one of claims 1 to 5, wherein the check valve is provided on a drain port for draining the tank body or the floor surface or on a pipe continuous from the drain port. Check valve.

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