JP2016090036A - Intake valve - Google Patents

Intake valve Download PDF

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JP2016090036A
JP2016090036A JP2014229329A JP2014229329A JP2016090036A JP 2016090036 A JP2016090036 A JP 2016090036A JP 2014229329 A JP2014229329 A JP 2014229329A JP 2014229329 A JP2014229329 A JP 2014229329A JP 2016090036 A JP2016090036 A JP 2016090036A
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intake valve
guide
valve
valve member
guide shaft
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JP6630890B2 (en
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伊藤 嘉浩
Yoshihiro Ito
伊藤  嘉浩
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Maruichi Corp
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Maruichi Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an intake valve capable of preventing leakage of a fluid from a valve member.SOLUTION: In an intake valve for preventing backflow from the internal to the external by implementing ventilation from the external to the internal of a pipe, the intake valve is composed of a casing body including a connecting portion to be connected to the pipe, an opening portion formed on the casing body for ventilation at the inside and outside of the casing body, a valve member closing the opening portion and applied as an operation part operated while movably forward and backward to the opening portion, a guide structure for guiding the forward/backward movement to the opening portion, of the valve member, and an energizing mechanism for energizing the valve member toward the opening portion to keep the opening portion in a closed state at a normal time. The valve member as the operation part is integrally molded with an elastic material to water-tightly close the opening portion.SELECTED DRAWING: Figure 3

Description

本発明は、排水配管等配管に備えられ、配管の外部から内部に吸気を行うと共に、配管の内部から外部への配管内の流体の逆流を防止する、吸気弁に関するものである。   The present invention relates to an intake valve that is provided in a pipe such as a drain pipe and that sucks air from the outside to the inside of the pipe and prevents back flow of fluid in the pipe from the inside of the pipe to the outside.

洗面台や流し台等、使用によって排水を生じる機器(以下「排水機器」)には、生じた排水の処理を行う為の、排水配管が施工されている。また、このような排水配管には、下水側からの臭気や害虫類が屋内側に逆流することを防止するために、排水トラップと呼ばれる排水装置を備えることが知られている。この排水トラップは、例えば管体を上下にSの字形状に屈曲させ、流路上に排水の溜まり水で満水となる部分を形成することで、この満水部分を下水側からの臭気や害虫類が逆流できないようにする、という構成の物が知られている。   Drainage pipes are installed in equipment that generates drainage by use (hereinafter referred to as “drainage equipment”) such as a wash basin and a sink. Further, it is known that such a drainage pipe is provided with a drainage device called a drainage trap in order to prevent odors and pests from the sewage side from flowing back to the indoor side. This drain trap is formed by, for example, bending the pipe body up and down into an S shape and forming a portion that is filled with drainage water on the flow path. The thing of the structure of preventing backflow is known.

このような排水配管において、シンクや洗面ボウルなど排水機器の槽の中に大量の排水があり、排水配管に流れ込む排水の量が多く、また排水に加えられる水圧が高い、等の条件が揃うと、排水配管中の空気がほぼ全て押し流され、流路上が全て排水で満たされる「満水管」と呼ばれる状態となることがある。
この満水管の状態では、排水性能が向上する一方で、騒音の発生がより一層大きくなる。
具体的には、配管内が満水となることでサイホン効果が発生し、上流側から下流側に負圧による引き込みが生じる。この引き込みにより、単純な勾配での自然排水以上の速さで排水が排出されるため、排水性能が向上する。一方で、上記のように負圧が生じているため、排水がほぼ完了し、満水管状態が終了する際に、排水口やオーバーフロー配管などから排水の代わりに空気の引き込みが発生する。この引き込みは、排水の流出量と同じだけ空気を引き込むこととなり、上記のように排水性能が向上していることから、引き込む空気の量・勢いも相当大きくなり、排水口やオーバーフロー配管から「ズルズル」といった大きな騒音が発生する原因となっていた。
In such drainage pipes, if there is a large amount of drainage in the tank of drainage equipment such as sinks and wash bowls, the amount of drainage flowing into the drainage pipe is large, and the water pressure applied to the drainage is high. In some cases, the air in the drainage pipe is almost completely swept away and the flow path is completely filled with drainage.
In this full-pipe state, the drainage performance is improved, but the generation of noise is further increased.
Specifically, the siphon effect is generated when the inside of the pipe is filled with water, and pull-in due to negative pressure occurs from the upstream side to the downstream side. This pull-in improves drainage performance because drainage is discharged at a rate faster than natural drainage with a simple gradient. On the other hand, since the negative pressure is generated as described above, when the drainage is almost completed and the full-pipe state is finished, air is drawn in from the drain port or the overflow pipe instead of the drainage. This pull-in draws air as much as the drainage outflow, and the drainage performance is improved as described above, so the amount and momentum of the pull-in air is considerably increased. It was a cause of loud noise.

上記のような排水配管において、排水性能の向上より騒音の減少を優先する場合、排水配管の途中部分に、排水口やオーバーフロー配管とは異なる開口部を設け、この開口部から排水配管内に吸気を行う方法が知られている。この開口部は、排水配管の配管外から配管内に吸気を行う一方で、配管内の排水が配管外に漏れることは防ぐ必要がある。また、開口部が上記排水トラップの下流側に設けられ、または開口部を有する部材が接続される場合、開口部から下水側の臭気や害虫類が排水配管外に逆流することを防止する必要がある。
このため、開口部には、排水配管の配管外から配管内へ通気を行うことは可能とする一方で、排水配管の配管内から配管外へ排水が漏れたり通気が生じることを防止する弁構造を備えて、いわゆる吸気弁とする場合が多い。
In the above drainage piping, when noise reduction is prioritized over the improvement of drainage performance, an opening that is different from the drainage port or overflow piping is provided in the middle of the drainage piping, and air is sucked into the drainage piping from this opening. The method of doing is known. While this opening sucks air into the pipe from the outside of the drain pipe, it is necessary to prevent the drainage in the pipe from leaking out of the pipe. In addition, when the opening is provided on the downstream side of the drain trap or when a member having the opening is connected, it is necessary to prevent sewage-side odors and pests from flowing backward from the drain to the outside of the drain pipe. is there.
For this reason, the valve structure prevents the leakage of drainage or ventilation from the inside of the drainage pipe to the outside of the pipe while allowing the opening to vent from the outside of the drainage pipe to the inside of the pipe. In many cases, a so-called intake valve is provided.

以下に、上記吸気弁の従来例について説明する。
特許文献1に記載の吸気弁は、以下に説明する、ケーシング体、弁部材、及び弁部材を弁座部に付勢する弾性体であるバネ部材から構成される。
弁部材は、円形の板材からなる弁体部と、該弁体部の中心を貫通して溶接されて取り付けられるガイド軸と、から構成される。
ケーシング体は筒形状であって、一端に排水配管など流体配管に接続される接続口を、他端は大気に開放される開口部を備えてなる。また、ケーシング体の途中部分には、接続口側を向いて、弁部材の弁体部が当接して接続口から開口部への流体の流れを閉塞する弁座部と、該弁座部の接続口側及び開口部側のそれぞれに、ガイド軸を内部に収納して弁部材の弁座部への進退をガイドするガイド筒を備えてなる。
使用時において、弁部材は、弁体部が弁座部より接続口側となるようにして、ガイド軸の一方が接続口側ガイド筒に、他方が開口部側ガイド筒に、それぞれ進退自在に挿通された状態で配置される。
更に、バネ部材を、弁部材部を弁座部に付勢するようにして配置する。
A conventional example of the intake valve will be described below.
The intake valve described in Patent Literature 1 includes a casing body, a valve member, and a spring member that is an elastic body that biases the valve member toward the valve seat portion, which will be described below.
A valve member is comprised from the valve body part which consists of a circular board | plate material, and the guide shaft attached by welding through the center of this valve body part.
The casing body has a cylindrical shape, and has a connection port connected to a fluid pipe such as a drain pipe at one end and an opening that is open to the atmosphere at the other end. In addition, a valve seat portion that faces the connection port side and contacts the valve body portion of the valve member and closes the flow of fluid from the connection port to the opening portion in the middle portion of the casing body, and the valve seat portion Each of the connection port side and the opening side is provided with a guide cylinder that accommodates the guide shaft therein and guides the advancement and retreat of the valve member to the valve seat.
In use, the valve member can be moved forward and backward so that the valve body is closer to the connection port side than the valve seat, and one of the guide shafts is connected to the connection port side guide tube and the other is opened to the opening side guide tube. It is arranged in the inserted state.
Further, the spring member is disposed so as to urge the valve member portion to the valve seat portion.

上記のように構成した吸気弁を、接続口が排水配管など流体の配管に連通するようにして接続する。接続に際しては、配管を流れる流体が漏れないように、流体が液体の場合は液密的に、気体の場合は気密的に接続する。
上記のように構成した吸気弁は、通常時はバネ部材の作用により弁部材の弁体部が弁座部に当接して開口部への流路を閉塞するため、接続口側から排水や気体などが開口部側に向かって逆流を生じても、弁部材によって逆流がせき止められ、開口部を介して配管の外部に排水や気体が漏れることは無い。
また、排水時には、上記のように、排水配管内が満水管状態に近くなることによって、排水配管内に負圧が発生するが、この発生した負圧の作用によって、吸気弁のケーシング体内は排水配管外に比べて負圧となる。
この負圧により、弁部材がバネ部材による付勢に抗して弁部材が接続口側に移動し、弁体部と弁座部が離間するため、開口部から接続口側に大気が通気し、生じた負圧を解消する。
上記した排水配管の排水時の場合、排水配管内に大気(空気)が供給されることで、満水管状態となる前に負圧が解消され、サイホン現象が発生しなくなるため、上記した「ズルズル」と言った大きな騒音の発生を防止することができる。
The intake valve configured as described above is connected such that the connection port communicates with a fluid pipe such as a drain pipe. When connecting, in order to prevent the fluid flowing through the pipe from leaking, the fluid is liquid-tight when the fluid is liquid and the gas-tight when it is gas.
In the intake valve configured as described above, the valve body portion of the valve member normally contacts the valve seat portion by the action of the spring member and closes the flow path to the opening portion. Even if a reverse flow occurs toward the opening side, the reverse flow is blocked by the valve member, so that drainage or gas does not leak to the outside of the pipe through the opening.
In addition, when draining, as described above, the drain pipe becomes nearly full, and negative pressure is generated in the drain pipe. Due to the negative pressure generated, the casing of the intake valve is drained. Negative pressure compared to outside of piping.
Due to this negative pressure, the valve member moves to the connection port side against the biasing force of the spring member, and the valve body portion and the valve seat portion are separated from each other, so that air is vented from the opening portion to the connection port side. The generated negative pressure is eliminated.
In the case of drainage of the drainage pipe described above, the air (air) is supplied into the drainage pipe, so that the negative pressure is eliminated before the full-pipe state is reached, and the siphon phenomenon does not occur. It is possible to prevent the generation of a loud noise.

特開2008−121875号公報JP 2008-121875 A

上記実施例において、弁部材の弁体部とガイド軸は別々の部材によって構成され、溶接によって接続されている。このように別々の部材を組み合わせて弁部材を構成した場合、接続箇所から流体が漏れる危険性があった。
上記従来例の場合、弁部材の弁体部とガイド軸を溶接によって接続してなるが、この溶接は単なる固定だけではなく、流体の漏れを防止する必要性から、ガイド軸と弁体部の当接箇所全体に渡って溶接を行わねばならず、溶接作業が不適切だったり、また溶接個所が不十分だと隙間部分から流体の漏れが発生する。
また、通常、弁体部の素材には、ゴムやエラストマー樹脂など、軟質の樹脂素材が使用される。しかしながら、このような軟質の樹脂素材は、溶接のような高温を利用しての取り付け方法では容易に溶けて流れ出してしまうか、あるいは加硫したゴムのように加熱しても溶融を生じない場合もある。
その他の方法としては、ガイド軸側と弁体部側に凹凸を設け、両者を嵌合させることで接続させる方法であるが、この方法は、あくまでガイド軸と弁体部との位置関係を固定するだけのもので、ガイド軸と弁体部との接続箇所からの流体の漏れを確実に防ぐ、という機能は有さない。
このように、吸気弁において、動作部分である弁部材からの流体の漏れを確実に防ぐ方法が求められていた。
本発明は前記問題に鑑み発明されたものであって、吸気弁について、弁部材から流体の漏れが発生することを防ぐ吸気弁を提供することを目的とする。
In the said Example, the valve body part and guide shaft of a valve member are comprised by the separate member, and are connected by welding. When the valve member is configured by combining the separate members as described above, there is a risk that the fluid leaks from the connection portion.
In the case of the above conventional example, the valve body portion of the valve member and the guide shaft are connected by welding, but this welding is not only fixed, but also from the need to prevent fluid leakage, the guide shaft and the valve body portion are connected. Welding must be performed over the entire contact area, and if the welding operation is inappropriate or if the welding location is insufficient, fluid leaks from the gap.
In general, a soft resin material such as rubber or elastomer resin is used as the material of the valve body. However, such a soft resin material can be easily melted and flowed out by a mounting method using a high temperature such as welding, or if it does not melt even when heated like vulcanized rubber There is also.
Another method is to provide unevenness on the guide shaft side and valve body side and connect them by fitting them together. However, this method only fixes the positional relationship between the guide shaft and valve body. It does not have a function of reliably preventing leakage of fluid from the connecting portion between the guide shaft and the valve body.
Thus, there has been a demand for a method for reliably preventing fluid leakage from a valve member that is an operating part in an intake valve.
This invention is invented in view of the said problem, Comprising: It aims at providing the intake valve which prevents that the fluid leaks from a valve member about an intake valve.

請求項1に記載の本発明は、配管の外部から内部への通気を行い、内部から外部への逆流を防止する吸気弁であって、
配管に接続される接続部を備えたケーシング体と、ケーシング体の内外の通気を行うための、ケーシング体に設けた開口部と、該開口部を閉塞する、開口部に対して進退自在に動作する動作部分である弁部材と、弁部材の開口部への進退をガイドするガイド構造と、弁部材を開口部に向けて付勢し、通常時開口部を閉塞状態とする付勢機構と、から構成し、動作部分である弁部材を、開口部を水密的に密閉するための弾性素材にて一体に成形したことを特徴とする吸気弁である。
The present invention according to claim 1 is an intake valve that ventilates from outside to inside of a pipe and prevents backflow from inside to outside,
Casing body provided with a connecting part connected to the piping, an opening provided in the casing body for ventilating the inside and outside of the casing body, and the opening that closes the opening and moves freely with respect to the opening A valve member that is an operating part, a guide structure that guides the advancement and retraction of the valve member toward the opening, a biasing mechanism that biases the valve member toward the opening and closes the opening at the normal time, The intake valve is characterized in that the valve member, which is an operating part, is integrally formed of an elastic material for hermetically sealing the opening.

請求項2に記載の本発明は、上記吸気弁のガイド構造を、弁部材又はケーシング体側のいずれか一方に設けたガイド軸と、弁部材又はケーシング体側のいずれか他方に設けた、ガイド軸を進退自在に収納するガイド筒とから構成すると共に、ガイド軸又はガイド筒に、ガイド筒内の空気をガイド筒外に通気させる通気構造を設けたことを特徴とする、段落0009に記載の吸気弁である。   According to a second aspect of the present invention, the guide structure of the intake valve includes a guide shaft provided on either the valve member or the casing body side, and a guide shaft provided on the other side of the valve member or the casing body side. The intake valve according to paragraph 0009, characterized in that the intake valve is configured to include a guide cylinder that is retractable and retractable, and the guide shaft or the guide cylinder is provided with a ventilation structure that allows air in the guide cylinder to vent outside the guide cylinder. It is.

請求項3に記載の本発明は、上記通気構造を、ガイド軸の外側面又はガイド筒の内側面に設けた溝部によって設けたことを特徴とする、段落0010に記載の吸気弁である。   The present invention described in claim 3 is the intake valve according to paragraph 0010, wherein the ventilation structure is provided by a groove provided on an outer surface of the guide shaft or an inner surface of the guide cylinder.

請求項4に記載の本発明は、上記吸気弁のガイド構造を、弁部材又は配管側のいずれか一方に設けたガイド軸と、弁部材又は配管側の他方に設けた、ガイド筒を進退自在に収納するガイド筒とから構成すると共に、ガイド軸外側面と、ガイド筒内側面とを、軸方向視非相似形状とすることで、ガイド軸の外側面とガイド筒の内側面との間に非接触部分を生じるようにし、相似形状の場合に比較し接触面積を減じる構造としたことを特徴とする、段落0009乃至段落0011のいずれか1つに記載の吸気弁である。   According to a fourth aspect of the present invention, the guide structure of the intake valve is provided with a guide shaft provided on either the valve member or the pipe side and a guide cylinder provided on the other side of the valve member or the pipe side. And the guide shaft outer surface and the guide tube inner surface are formed in a shape similar to each other in the axial direction, so that the space between the outer surface of the guide shaft and the inner surface of the guide tube is reduced. The intake valve according to any one of paragraphs 0009 to 0011, wherein a non-contact portion is generated, and the contact area is reduced as compared with a similar shape.

請求項5に記載の本発明は、上記吸気弁の弁部材を、進退方向に垂直な面を基準とした面対称形状としたことを特徴とする、段落0009乃至段落0012のいずれか1つに記載の吸気弁である。   According to a fifth aspect of the present invention, in any one of the paragraphs 0009 to 0012, the valve member of the intake valve has a plane symmetrical shape with respect to a plane perpendicular to the advancing / retreating direction. It is an intake valve of description.

請求項1に記載の本発明によれば、動作部分である弁部材を、開口部を水密的に密閉するための弾性素材にて一体に成形したことで、
弁体部など弁座に当接する部分と、弁部材上のガイド構造を成す部分との間に継ぎ目が無くなり、継ぎ目部分から流体が漏れることが無くなった。
請求項2に記載の本発明では、ガイド筒とガイド軸の間に通気構造を設けたことで、弁部材の動作がガイド軸とガイド筒の間に密閉状態が生じ、空気圧によって弁部材の動作に不具合が生じる、といった問題を解決することができた。これは、請求項1に記載の発明のように、ガイド軸自体が弾性部材で構成され、ガイド軸とガイド筒の間に特に密閉状態が生じ易くなった場合において好適な効果である。
請求項3に記載の本発明では、通気構造の具体的な構成を明確にできた。
請求項4に記載の本発明では、ガイド筒とガイド軸の接触面積を減少させ、弁部材の動作が摩擦によって妨げられることを生じにくくすることができた。これは、請求項1に記載の発明のように、ガイド軸自体が弾性素材で構成され、ガイド軸側の摩擦係数が例えば表面が滑らかな硬質樹脂等と比べ、高くなった場合において好適な効果である。
請求項5に記載の本発明では、弁部材を、進退方向に垂直な面を基準とした面対称形状としたことで、製品の製造時に、弁部材の軸方向への入れ間違いを防止することができた。
According to the first aspect of the present invention, the valve member that is the operation part is integrally formed of an elastic material for watertightly sealing the opening,
There is no seam between the part that contacts the valve seat, such as the valve body part, and the part that forms the guide structure on the valve member, and fluid does not leak from the seam part.
According to the second aspect of the present invention, since the ventilation structure is provided between the guide cylinder and the guide shaft, the valve member operates in a sealed state between the guide shaft and the guide cylinder. We were able to solve the problem that the problem occurred in This is a suitable effect when the guide shaft itself is made of an elastic member as in the first aspect of the invention and a sealed state is likely to occur between the guide shaft and the guide tube.
In the present invention described in claim 3, the specific configuration of the ventilation structure can be clarified.
In the fourth aspect of the present invention, the contact area between the guide tube and the guide shaft can be reduced, and the operation of the valve member can be made less likely to be hindered by friction. This is an advantageous effect when the guide shaft itself is made of an elastic material and the friction coefficient on the guide shaft side is higher than that of, for example, a hard resin having a smooth surface, as in the first aspect of the invention. It is.
In the present invention according to claim 5, the valve member has a plane symmetrical shape with respect to a plane perpendicular to the advancing / retreating direction, thereby preventing an erroneous insertion of the valve member in the axial direction during manufacture of the product. I was able to.

本発明の吸気弁が採用された洗面台と、その排水配管示す断面図である。It is sectional drawing which shows the washstand by which the intake valve of this invention was employ | adopted, and its drainage piping. 第一実施例の吸気弁の閉塞状態を示す断面図である。It is sectional drawing which shows the obstruction | occlusion state of the intake valve of 1st Example. 第一実施例の吸気弁の一部を切り欠きした斜視図である。It is the perspective view which notched some intake valves of the 1st example. 図2とは異なる方向における、吸気弁の閉塞状態を示す断面図である。FIG. 3 is a cross-sectional view showing a closed state of the intake valve in a direction different from FIG. 2. 図3とは異なる方向における、吸気弁の一部を切り欠きした斜視図である。FIG. 4 is a perspective view in which a part of the intake valve is cut away in a direction different from FIG. 3. 第一実施例の吸気弁の通気状態を示す断面図である。It is sectional drawing which shows the ventilation | gas_flowing state of the intake valve of 1st Example. 図6とは異なる方向における吸気弁の通気状態を示す断面図である。It is sectional drawing which shows the ventilation | gas_flowing state of the intake valve in the direction different from FIG. 第一実施例の吸気弁の部材構成を示す断面図である。It is sectional drawing which shows the member structure of the intake valve of 1st Example. 第一実施例の吸気弁の部材構成を示す、一部を切り欠きした斜視図である。It is the perspective view which notched a part which shows the member structure of the intake valve of 1st Example. 第一実施例の吸気弁本体の平面図である。It is a top view of the intake valve main body of a 1st Example. 第一実施例のカバー部材の底面図である。It is a bottom view of the cover member of the first embodiment. 第一実施例の弁部材の、(a)斜視図(b)平面図(c)断面図である。It is (a) perspective view (b) top view (c) sectional drawing of the valve member of a 1st Example. 弁部材にガイド筒を備えた吸気弁の閉塞状態を示す断面図である。It is sectional drawing which shows the obstruction | occlusion state of the intake valve which provided the guide cylinder in the valve member. 図13の実施例の吸気弁の通気状態を示す断面図である。It is sectional drawing which shows the ventilation | gas_flowing state of the intake valve 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12に示した、本発明の第一実施例の吸気弁は、洗面台Sの排水配管Pに接続される部材であって、以下に記載する、ケーシング体1、弁部材7、バネ部材8、から構成される。
ケーシング体1は、以下に記載する、吸気弁本体3、及びカバー部材2より構成される。
吸気弁本体3は、略円筒形状を成す部材であって、ポリプロピレンなどの硬質樹脂素材から構成され、上端には後述するカバー部材2と螺合する雄ネジを備えた開放部分となっている。
また、吸気弁本体3の下端には洗面台Sの排水配管Pの接続箇所と螺合する雌ネジを備えた、接続部3bを備えてなる。
また、略円筒形状を成す吸気弁本体3の、雄ネジよりも上方に、円周に沿って凹部が形成され、この凹部にリング状のパッキングを配置してなる。施工完了時、このパッキングが凹部と後述するカバー部材2内面とに密接するため、吸気弁内を移動する大気や排水等に対して密閉状態となり、吸気弁本体3とカバー部材2の継ぎ目より、吸気弁内部の大気や排水が、吸気弁外に漏れることを防止する。
また、側面方向から貫通するようにして四角柱部分3aが形成されている。吸気弁本体3の円筒部分の側面に形成される、四角柱部分3aの両端部分は大気開放された開口となっている。
また、この四角柱部分3aの壁面の内、上側の壁面には平面視円形の開口部4が形成され、開口部4の上面側の周縁には突条のリブが、開口部4の周縁に沿って連続して形成されて弁座部4aを形成してなる。
また、四角柱部分3aの壁面の内、下側の壁面には円筒形状を成すガイド筒6が、開口部4の下端の高さ位置まで、即ち四角柱部分3aの上側の壁面の下端の高さ位置まで、垂立して形成されてなる。ガイド筒6の内径は約7ミリメートル程度である。
四角柱部分3aの横方向の壁面と、円筒部分の内側面の間には、通気可能な通気路Lが形成されている。
平面視において、雄ネジと開口部4とガイド筒6は、いずれも同心円となる位置関係に形成されており、その径の大きさは、図10に示したように、小径から大径となる順に、ガイド筒6、開口部4、雄ネジ、となる。
また、ガイド筒6の下端側面には、大気開放された通気穴6aが形成されてなる。
カバー部材2は、略釣鐘形状、即ち上端が閉塞され下方が開放された円筒形状を成す部材であって、ポリプロピレンなどの硬質樹脂素材から構成され、円筒形状の下方内周面に、吸気弁本体3の雄ネジと螺合する雌ネジを備えてなる。
また、カバー部材は、円筒形状を成すガイド筒6が、垂立して形成されてなる。このガイド筒6の内径も、吸気弁本体3のガイド筒6の内径と同様に、約7ミリメートル程度である。
また、上端を閉塞する上側の壁面の下面は、図11に示したように、底面視において、雌ネジとガイド筒6が、いずれも同心円となる位置関係に形成されている。
上記した吸気弁本体3とカバー部材2は、吸気弁本体3の雄ネジと、カバー部材2の雌ネジを螺合させることで、吸気弁本体3の上方の開放部分がカバー部材2によって覆われて継ぎ目が密閉状態となり、この状態にて吸気弁のケーシング体1として機能する。このケーシング体1の状態では、四角柱部分3aの上側の壁面に形成された開口部4から、通気路Lを介し、接続部3bに至る流体(空気)の流路が形成されてなる。
弁部材7は、図12に示したように、平面視弁座部4aが成す円形形状よりも若干大径を成す、厚み1ミリメートル、直径40ミリメートル程度の円盤形状の弁体部7aと、弁体部7aの中央部分から、弁体部7aに垂直を成す軸体であるガイド軸5を上下にそれぞれ同じ長さ、具体的には15ミリメートル程度ずつ垂立するようにして備えた部材であって、ゴムなどの弾性素材によって一体に成形されてなる。
上記のように構成したことによって、本実施例の弁部材7は、ガイド軸5に垂直な面、具体的には、側面視弁体部7aの上面と下面の中間部分の面を対称の基準面とした、面対称形状に構成されてなる。
また、弁部材7を構成する弾性素材の比重は1よりも大きく、吸気弁内に排水が逆流する等して吸気弁内に排水が満たされても浮力を生じることは無い。
ガイド軸5は直径6.5ミリメートル程度、長さ15ミリメートル程度の円柱の側面に、軸方向に沿って四か所縦溝である溝部5aを設け、平面視(又は軸方向視)略十字形状となるように構成してなる。略十字形状の縦棒の横幅/又は横棒の縦幅(図12(b)のAの幅)は約2ミリメートルである。
この弁部材7を構成するゴムの硬度は、本実施例の吸気弁の弁部材7程度の大きさの場合、肉厚1ミリメートル程度では自重などで若干のたわみ・弾性を生じ、肉厚2ミリメートル以上ではある程度の剛性を生じ、少なくとも吸気弁の使用において硬質の部分として扱うことができる硬度である。
ここで、「本実施例の吸気弁の弁部材7程度の大きさ」とは、最も長い部分でも40ミリメートルを超えない程度の大きさである。本実施例では前述のように弁体部7aの直径が約40ミリメートルである(「本実施例の吸気弁の弁部材7を超える程度の大きさ」の部材に、同じゴム素材を用いた場合は、肉厚が2ミリメートルを超える場合でも、寸法が大きくなる分自重も増し、自重等によるたわみを生じる場合がある)。
バネ部材8は上下方向に弾性を生じる弾性部7d材であって、吸気弁を組み上げた状態では、ガイド筒6の中であって、ガイド軸5上面とカバー部材2下面の間に配置されて、弁部材7を弁座部4a側に付勢するように機能する。
Below, the 1st example of the present invention is described, referring to drawings.
The intake valve of the first embodiment of the present invention shown in FIG. 1 to FIG. 12 is a member connected to the drain pipe P of the wash basin S. The casing body 1, the valve member 7, described below, The spring member 8 is configured.
The casing body 1 includes an intake valve main body 3 and a cover member 2 described below.
The intake valve body 3 is a member having a substantially cylindrical shape, and is made of a hard resin material such as polypropylene. The upper end of the intake valve body 3 is an open portion provided with a male screw screwed with a cover member 2 described later.
Further, the lower end of the intake valve main body 3 is provided with a connecting portion 3b provided with a female screw that is screwed into a connecting portion of the drainage pipe P of the wash basin S.
Further, a concave portion is formed along the circumference of the intake valve body 3 having a substantially cylindrical shape above the male screw, and a ring-shaped packing is disposed in the concave portion. When the construction is completed, the packing is in close contact with the recess and the inner surface of the cover member 2 to be described later. Prevents air and drainage inside the intake valve from leaking outside the intake valve.
Further, a quadrangular prism portion 3a is formed so as to penetrate from the side surface direction. Both end portions of the quadrangular column portion 3a formed on the side surface of the cylindrical portion of the intake valve main body 3 are openings opened to the atmosphere.
In addition, an opening 4 having a circular shape in plan view is formed on the upper wall surface of the wall surface of the quadrangular prism portion 3 a, and ribs of ridges are formed on the periphery of the upper surface side of the opening 4. The valve seat 4a is formed continuously.
Further, a cylindrical guide tube 6 is formed on the lower wall surface of the rectangular column portion 3a up to the height of the lower end of the opening 4, that is, the height of the lower end of the upper wall surface of the rectangular column portion 3a. It is formed to stand up to this position. The inner diameter of the guide tube 6 is about 7 millimeters.
A ventilating air passage L is formed between the lateral wall surface of the quadrangular column portion 3a and the inner side surface of the cylindrical portion.
In plan view, the male screw, the opening 4 and the guide cylinder 6 are all formed in a concentric positional relationship, and the size of the diameter increases from a small diameter to a large diameter as shown in FIG. In this order, the guide tube 6, the opening 4, and the male screw are provided.
Further, a vent hole 6 a that is open to the atmosphere is formed on the lower side surface of the guide cylinder 6.
The cover member 2 is a substantially bell-shaped member, that is, a member having a cylindrical shape whose upper end is closed and whose lower part is opened. The cover member 2 is made of a hard resin material such as polypropylene. And a female screw that is screwed into the male screw 3.
Further, the cover member is formed by vertically hanging a guide tube 6 having a cylindrical shape. The inner diameter of the guide cylinder 6 is also about 7 mm, similar to the inner diameter of the guide cylinder 6 of the intake valve body 3.
Further, as shown in FIG. 11, the lower surface of the upper wall surface closing the upper end is formed in a positional relationship in which the female screw and the guide tube 6 are both concentric in a bottom view.
The intake valve main body 3 and the cover member 2 are engaged with the cover member 2 so that the male screw of the intake valve main body 3 and the female screw of the cover member 2 are screwed together. Thus, the seam is in a sealed state, and functions as the casing body 1 of the intake valve in this state. In the state of the casing body 1, a fluid (air) flow path is formed from the opening portion 4 formed on the upper wall surface of the quadrangular column portion 3 a to the connection portion 3 b through the ventilation path L.
As shown in FIG. 12, the valve member 7 includes a disc-shaped valve body portion 7a having a diameter slightly larger than the circular shape formed by the planar valve seat portion 4a and having a thickness of about 1 millimeter and a diameter of about 40 millimeters. It is a member provided so that the guide shaft 5 which is a shaft body perpendicular to the valve body portion 7a is vertically suspended from the central portion of the body portion 7a by the same length, specifically about 15 millimeters. In this case, it is integrally formed of an elastic material such as rubber.
By configuring as described above, the valve member 7 of the present embodiment is configured such that the surface perpendicular to the guide shaft 5, specifically, the surface of the intermediate portion between the upper surface and the lower surface of the side-view valve body portion 7 a is symmetrical. The surface is configured in a plane-symmetric shape.
Further, the specific gravity of the elastic material constituting the valve member 7 is greater than 1, and buoyancy does not occur even when the drainage is filled in the intake valve due to the backflow of the drainage into the intake valve.
The guide shaft 5 is provided with groove portions 5a which are four vertical grooves along the axial direction on the side surface of a cylinder having a diameter of about 6.5 millimeters and a length of about 15 millimeters. It is comprised so that. The horizontal width of the substantially cross-shaped vertical bar / or the vertical width of the horizontal bar (the width of A in FIG. 12B) is about 2 millimeters.
When the hardness of the rubber constituting the valve member 7 is about the size of the valve member 7 of the intake valve of this embodiment, a thickness of about 1 mm causes a slight deflection / elasticity due to its own weight, and a thickness of 2 mm. The above is a hardness that produces a certain degree of rigidity and can be handled as a hard part at least when the intake valve is used.
Here, “the size of the valve member 7 of the intake valve of the present embodiment” is a size that does not exceed 40 millimeters even in the longest portion. In this embodiment, as described above, the diameter of the valve body portion 7a is about 40 millimeters (when the same rubber material is used for a member having a size that exceeds the valve member 7 of the intake valve of this embodiment). In some cases, even if the wall thickness exceeds 2 millimeters, the weight increases as the size increases, which may cause deflection due to its own weight).
The spring member 8 is an elastic portion 7d that generates elasticity in the vertical direction. In the state where the intake valve is assembled, the spring member 8 is disposed in the guide cylinder 6 and between the upper surface of the guide shaft 5 and the lower surface of the cover member 2. The valve member 7 functions to bias the valve seat portion 4a.

上記の吸気弁が取り付けられる洗面台Sは、以下のように構成されてなる。
洗面台Sは、槽体としての、上方が開口し底面に排水口を備えた洗面ボウルWと、該洗面ボウルWを載架するキャビネット部Cからなる。
また、キャビネット部C内には、排水口から床下配管に向けて管体を利用した排水配管Pが施工されてなる。この排水配管Pは、排水口から、曲がり管、及びU字形状に屈曲させた管体を、組み合わせてS字形状に屈曲させた、トラップ管Tなどの各種管体を水密的に接続して構成してなる。
トラップ管Tは、上記の通り管体をS字形状に屈曲させた部材であって、排水時この管体内部に排水が溜まり、排水の流路の一部が満水状態となる部分を形成する。下流に当たる下水側から臭気や害虫類が逆流しても、このトラップ管Tの満水部分を通過することが不可能なため、下水側から屋内側に臭気や害虫類が通過することを防ぐことができる。
この排水配管Pにおいて、トラップ管Tの満水部分の溜り水、通常「封水」及ばれる溜り水よりも下流側に、吸気弁の接続部3bと接続する被接続部P1を形成してなる。
被接続部P1について詳述すると、被接続部P1は、上記封水部分よりも下流側且つ封水部分よりも下流側の配管においては最も高い位置であって、且つ流路の方向に対し垂直となる位置関係の位置に、上方を向いた枝管部分を構成し、この枝管部分の端部に接続部3bの雌ネジと螺合する雄ネジを設けて吸気弁を接続可能に構成してなる。
The wash basin S to which the intake valve is attached is configured as follows.
The wash basin S is composed of a wash bowl W, which opens as a tank body and has a drain outlet on the bottom, and a cabinet portion C on which the wash bowl W is mounted.
Moreover, in the cabinet part C, the drainage piping P using a pipe body is constructed toward the underfloor piping from the drainage port. This drainage pipe P is a watertight connection of various pipes such as a trap pipe T which is bent into an S-shape by combining a bent pipe and a pipe bent into a U-shape from a drain outlet. Consists of.
The trap tube T is a member obtained by bending the tubular body into an S shape as described above, and forms a portion where drainage is accumulated inside the tubular body during drainage, and a part of the drainage flow path becomes full. . Even if odors and pests flow backward from the sewage side that hits the downstream side, it is impossible to pass through the full part of this trap tube T, so it is possible to prevent odors and pests from passing from the sewage side to the indoor side. it can.
In this drainage pipe P, a connected portion P1 connected to the connection portion 3b of the intake valve is formed on the downstream side of the pooled water of the trap tube T, which is normally “sealed water”.
The connected part P1 will be described in detail. The connected part P1 is the highest position in the piping downstream of the sealed part and downstream of the sealed part, and is perpendicular to the direction of the flow path. A branch pipe portion facing upward is formed at the position of the positional relationship, and a male screw that engages with the female screw of the connection portion 3b is provided at the end of the branch pipe portion so that the intake valve can be connected. It becomes.

段落0016に記載した吸気弁の各部材は、以下のようにして組み立てられ、この吸気弁を用いて、段落0017に記載した洗面台Sの排水配管Pが接続・施工される。
尚、以下の説明において、特に詳述しない場合でも、各部の接続箇所は、必要に応じて水密的、又は気密的に接続される。
吸気弁本体3のガイド筒6に、弁部材7のガイド軸5を挿通する。この時弁部材7はガイド軸5に垂直な面に対して面対称に構成されているため、2つあるガイド軸5のいずれをガイド筒6に挿通しても何ら問題は無く、入れ間違いが生じない。この時、吸気弁本体3側のガイド筒6に挿入されたガイド軸5を以下「本体側ガイド軸5」、もう一方のガイド軸5を「カバー部材2側ガイド軸5」、と呼ぶ。
この状態から、カバー部材2側のガイド軸5にバネ部材8を配置した上で、カバー部材2側ガイド軸5を、カバー部材2のガイド筒6に挿通し、吸気弁本体3の雄ネジを、カバー部材2の雌ネジに螺合させることで、吸気弁本体3とカバー部材2が組み合わされてケーシング体1となり、吸気弁が完成する。
本実施例では、上記のように構成したことで、バネ部材8及び弁部材7の自重が、弁部材7を開口部4に付勢する付勢機構として機能する。また、弁部材7に設けたガイド軸5と、このガイド軸5が挿通される吸気弁本体3及びカバー部材2のガイド筒6が、弁部材7の開口部4への進退動作をガイドするガイド構造として機能する。
更に、吸気弁本体3の接続部3bの雌ネジを、洗面台Sの排水配管Pの枝管部分の雄ネジと螺合させて、吸気弁を排水配管Pに接続し、吸気弁を備えた、洗面台Sの排水配管Pの施工が完了する。
Each member of the intake valve described in paragraph 0016 is assembled as follows, and the drainage pipe P of the wash basin S described in paragraph 0017 is connected and constructed using the intake valve.
In the following description, even if not specifically described, the connecting portions of the respective parts are connected in a watertight or airtight manner as necessary.
The guide shaft 5 of the valve member 7 is inserted into the guide cylinder 6 of the intake valve body 3. At this time, since the valve member 7 is configured to be plane-symmetric with respect to a plane perpendicular to the guide shaft 5, there is no problem even if any of the two guide shafts 5 is inserted into the guide cylinder 6, and there is an error in insertion. Does not occur. At this time, the guide shaft 5 inserted into the guide cylinder 6 on the intake valve main body 3 side is hereinafter referred to as “main body side guide shaft 5”, and the other guide shaft 5 is referred to as “cover member 2 side guide shaft 5”.
From this state, after the spring member 8 is arranged on the guide shaft 5 on the cover member 2 side, the cover member 2 side guide shaft 5 is inserted into the guide cylinder 6 of the cover member 2 and the male screw of the intake valve body 3 is inserted. Then, the intake valve main body 3 and the cover member 2 are combined to form the casing body 1 by being screwed into the female screw of the cover member 2, and the intake valve is completed.
In the present embodiment, the configuration as described above allows the own weight of the spring member 8 and the valve member 7 to function as a biasing mechanism that biases the valve member 7 toward the opening 4. A guide shaft 5 provided on the valve member 7 and a guide cylinder 6 of the intake valve main body 3 and the cover member 2 through which the guide shaft 5 is inserted guide the advance / retreat operation of the valve member 7 to the opening 4. Acts as a structure.
Furthermore, the intake screw was connected to the drainage pipe P by screwing the female screw of the connecting portion 3b of the intake valve body 3 with the male screw of the branch pipe portion of the drainage pipe P of the wash basin S, and provided with the intake valve. The construction of the drainage pipe P of the sink S is completed.

上記のように構成した、本発明の第一実施例の吸気弁を排水配管Pに採用した洗面台Sは、以下のように使用される。
洗面台Sを使用していない状態、即ち排水が生じていない状態では、図2乃至図5に示したように、吸気弁の弁部材7は、弁部材7の自重とバネ部材8によって付勢され、下方の弁座部4aに弁体部7aが当接して開口部4を閉塞している。このため、下水側からの臭気や害虫類が、吸気弁を介して屋内側に侵入することは無い。
また、洗面台Sの使用により、洗面ボウルW内に排水が生じると、排水は、排水配管Pを介して下水側に排出される。
この時、排水の初期に、配管内の空気が排水に押し出されて一時的に接続部3bから吸気弁のケーシング体1内に流入し、ケーシング体1内が正圧となる場合があるが、この場合も弁部材7の自重とバネ部材8、更に正圧による空気の圧力によって弁部材7が弁座部4a側に付勢され、開口部4を閉塞するため、排水配管P内の空気等が、開口部4を介して排水配管P外に逆流する、ということが無い。
また、上記のように、吸気弁のケーシング体1内に空気だまりが生じることで、吸気弁のケーシング体1内に溜まった空気の圧力でケーシング体1内に排水が流入することが防止される為、排水配管P内の排水が、開口部4を介して排水配管P外に逆流する、ということが無い。仮に、何らかの理由により吸気弁のケーシング体1内に排水が流入しても、弁部材7が比重1よりも大きい素材で成形されており、浮力を生じることも無いので、弁部材7が分座部に当接して開口部4を閉塞した状態が維持され、排水配管P内の排水が、開口部4を介して排水配管P外に逆流する、ということが無い。
洗面ボウルWからの排水が進み、排水配管P内が満水管状態に近くなると、排水配管P内に負圧が発生するが、この発生した負圧の作用によって、吸気弁のケーシング体1内は排水配管P外に比べて負圧となる。
この負圧の作用によって、図6乃至図7に示したように、弁部材7が自重とバネ部材8による付勢に抗して上昇し、弁座部4aから離間して開口部4が開口されることで、開口部4から、通気路L及び接続部3bを介し、排水配管P内に排水配管P外の空気が流入し負圧を解消するため、サイホン効果が抑制されて、排水時に排水口やオーバーフロー配管から「ズルズル」といった大きな騒音が発生することを防止することができる。
尚、開口部4が開口している状態では、排水配管P内の負圧によって、排水配管P外から排水配管P内への空気の流れが発生しており、開口部4を介して空気や排水の、排水配管P内から排水配管P外への逆流は発生しない。
排水が完了し、排水配管P内の負圧の発生が終了すると、弁部材7は自重とバネ部材8の弾発による付勢によって弁座部4aに当接し、開口部4を閉塞して、排水配管P内から、排水配管P外への臭気や害虫類の逆流が防止された状態に戻る。
以降、上記のようにして洗面台Sを支障なく使用することができる。
The wash basin S constructed as described above and employing the intake valve of the first embodiment of the present invention for the drain pipe P is used as follows.
In a state where the washstand S is not used, that is, in a state where drainage is not generated, the valve member 7 of the intake valve is biased by the weight of the valve member 7 and the spring member 8 as shown in FIGS. Then, the valve body portion 7a contacts the lower valve seat portion 4a to close the opening portion 4. For this reason, odors and pests from the sewage side do not enter the indoor side through the intake valve.
Further, when drainage occurs in the wash bowl W due to the use of the wash basin S, the drainage is discharged to the sewage side via the drain pipe P.
At this time, in the initial stage of drainage, the air in the pipe is pushed out into the drainage and temporarily flows into the casing body 1 of the intake valve from the connection part 3b, and the inside of the casing body 1 may become positive pressure. Also in this case, the valve member 7 is urged toward the valve seat 4a side by the self-weight of the valve member 7 and the spring member 8, and the air pressure due to the positive pressure, and the opening 4 is closed. However, it does not flow back out of the drainage pipe P through the opening 4.
In addition, as described above, the accumulation of air in the casing body 1 of the intake valve prevents the waste water from flowing into the casing body 1 due to the pressure of air accumulated in the casing body 1 of the intake valve. Therefore, the drainage in the drainage pipe P does not flow back out of the drainage pipe P through the opening 4. Even if drainage flows into the casing body 1 of the intake valve for some reason, the valve member 7 is formed of a material larger than the specific gravity 1 and does not generate buoyancy. The state in which the opening 4 is closed by contacting the portion is maintained, and the wastewater in the drainage pipe P does not flow back out of the drainage pipe P through the opening 4.
When drainage from the wash bowl W progresses and the inside of the drainage pipe P becomes almost full, a negative pressure is generated in the drainage pipe P. Due to the negative pressure generated, the inside of the casing body 1 of the intake valve Compared to the outside of the drain pipe P, the pressure is negative.
As shown in FIGS. 6 to 7, the negative pressure causes the valve member 7 to rise against its own weight and the biasing force of the spring member 8, and away from the valve seat 4a to open the opening 4. As a result, the air outside the drainage pipe P flows into the drainage pipe P from the opening 4 via the ventilation path L and the connection part 3b, and the negative pressure is eliminated. It is possible to prevent large noise such as “slack” from the drain port or the overflow pipe.
In the state where the opening 4 is open, a negative pressure in the drainage pipe P causes an air flow from the outside of the drainage pipe P to the drainage pipe P. The backflow of the drainage from the drainage pipe P to the outside of the drainage pipe P does not occur.
When the drainage is completed and the generation of the negative pressure in the drainage pipe P is finished, the valve member 7 comes into contact with the valve seat portion 4a due to its own weight and the spring force of the spring member 8 and closes the opening portion 4, The state returns to the state in which the backflow of odors and pests from the drain pipe P to the outside of the drain pipe P is prevented.
Thereafter, the sink S can be used without any trouble as described above.

上記実施例においては、図12に示したように、ガイド軸5に、軸方向に沿って四か所縦溝である溝部5aを設け、平面視(又は軸方向視)略十字形状となるように構成し、ガイド軸5の軸方向視における外形形状を、ガイド軸5が挿通されるガイド筒6の軸方向視の内形形状である円形とは非相似となる形状としたことで、両者の間に通気可能な隙間空間を形成してなる。
弁部材7をゴムなど弾性素材にて一体に成形したため、ガイド軸5もまた密閉性が高いゴム部材等弾性素材によって構成されてなる。このため、ガイド軸5とガイド軸5を挿通するガイド筒6の密閉性も高くなる。このような構成において、ガイド軸5の軸方向視における外径形状と、ガイド軸5が挿通されるガイド筒6の軸方向視の内径形状とを相似形状とすると、弁部材7が動作する際に、ガイド筒6内の、ガイド軸5が移動するための隙間空間(カバー部材2側のガイド筒6であればガイド軸5よりも上方の、吸気弁本体3側のガイド筒6であればガイド軸5よりも下方の空間)の空気が、ガイド筒6外へ通気できなくなり、ガイド軸5の進退動作を困難にしてしまう場合がある。
そこで上記実施例のように、ガイド軸5の軸方向視の外径形状を、ガイド軸5が挿通されるガイド筒6の軸方向視の内径形状である円形とは非相似となる形状としたことで、両者の間に通気可能な隙間空間が形成され、これがガイド軸5とガイド筒6の通気構造となり、ガイド筒6内の、ガイド軸5が移動するための隙間空間の空気が、ガイド筒6外へ容易に通気できるようになり、ガイド軸5の進退動作が容易に行うことができるようになった。尚、上記実施例では、吸気弁本体3のガイド筒6の下端側面にも、大気開放された通気穴6aが形成されてなり、これもガイド軸5とガイド筒6の通気構造であって、ガイド軸5の進退動作が容易に行うことができるようになった。
In the above embodiment, as shown in FIG. 12, the guide shaft 5 is provided with groove portions 5a that are four vertical grooves along the axial direction so as to have a substantially cross shape in a plan view (or an axial view). And the outer shape of the guide shaft 5 viewed in the axial direction is a shape that is not similar to the circular shape that is the inner shape of the guide tube 6 through which the guide shaft 5 is inserted. A gap space that can be ventilated is formed.
Since the valve member 7 is integrally formed of an elastic material such as rubber, the guide shaft 5 is also made of an elastic material such as a rubber member having high sealing performance. For this reason, the sealing performance of the guide cylinder 5 and the guide cylinder 6 inserted through the guide shaft 5 is also improved. In such a configuration, when the outer diameter shape of the guide shaft 5 as viewed in the axial direction and the inner diameter shape of the guide tube 6 through which the guide shaft 5 is inserted are similar, the valve member 7 operates. Further, a clearance space in the guide cylinder 6 for the guide shaft 5 to move (if the guide cylinder 6 on the cover member 2 side is the guide cylinder 6 on the intake valve main body 3 side above the guide shaft 5). Air in the space below the guide shaft 5 may not be able to vent to the outside of the guide tube 6, which may make it difficult to advance and retract the guide shaft 5.
Therefore, as in the above embodiment, the outer diameter shape of the guide shaft 5 as viewed in the axial direction is a shape that is not similar to the circular shape that is the inner diameter shape of the guide tube 6 through which the guide shaft 5 is inserted. As a result, a gap space is formed between the guide shaft 5 and the guide tube 6, and the air in the gap space for moving the guide shaft 5 in the guide tube 6 is guided by the guide shaft 5 and the guide tube 6. As a result, the guide shaft 5 can be easily moved forward and backward. In the above embodiment, the lower surface of the guide cylinder 6 of the intake valve body 3 is also formed with a vent hole 6a that is open to the atmosphere, and this is also a ventilation structure of the guide shaft 5 and the guide cylinder 6. The advance / retreat operation of the guide shaft 5 can be easily performed.

また、上記段落0020の記載のように、ガイド軸5の軸方向視における外形形状を、ガイド軸5が挿通されるガイド筒6の軸方向視の内形形状とは非相似となる形状としたことで、上記通気構造の効果の他に、ガイド筒6とガイド軸5の接触面積を減少させ、弁部材7の動作が摩擦によって妨げられることを生じにくくすることができた。上記実施例のように、弁部材7を弾性素材で一体に成形した場合、ガイド軸5もまた弾性素材で構成されることとなる。このように、弾性素材にて構成したため、ガイド軸5の表面の摩擦係数が、表面が滑らかな硬質樹脂等と比べ高くなることに対し、本実施例では、接触面積を減少させて、構造によって、弁部材7の進退動作が滑らかに行えるようにすることができる。   Further, as described in paragraph 0020 above, the outer shape of the guide shaft 5 viewed in the axial direction is a shape that is not similar to the inner shape of the guide tube 6 through which the guide shaft 5 is inserted viewed in the axial direction. As a result, in addition to the effect of the ventilation structure, the contact area between the guide cylinder 6 and the guide shaft 5 can be reduced, and the operation of the valve member 7 can be prevented from being hindered by friction. When the valve member 7 is integrally formed of an elastic material as in the above embodiment, the guide shaft 5 is also formed of an elastic material. As described above, since the elastic material is used, the friction coefficient of the surface of the guide shaft 5 is higher than that of a hard resin having a smooth surface. On the other hand, in this embodiment, the contact area is reduced depending on the structure. The valve member 7 can be smoothly advanced and retracted.

本発明の実施例は以上であるが、本発明は上記実施例に限定されるものでは無く、発明の主旨を逸脱しない範囲において、適宜変更可能である。
例えば、上記各実施形態では、吸気弁本体3とカバー部材2にガイド筒6を、弁部材7にガイド軸5を、それぞれ設けて構成してなるが、本発明は上記実施例に限定されるものでは無く、図13及び図14に示したように、吸気弁のカバー部材2にガイド軸5を、吸気弁本体3にガイド軸5の先端を固定してガイド軸5が傾斜することを防止する受け部9を、それぞれ設け、このガイド軸5に挿通されて上下に進退するガイド筒6を弁部材7に備えた構成としても良い。図13及び図14に図示した受け部9は、図面の手前側及び奥側にそれぞれアーム部分を備えて吸気弁本体3の内側側面と接続する形で吸気弁本体と一体に構成されており、ガイド軸5は、上方はカバー部材2に一体に構成されて固定され、下方は受け部9に差し込まれてやはり固定されて、熱や応力などで傾くことが無い。このため、このガイド軸5にガイドされて上限に進退するガイド筒6及びそのガイド筒と一体に成形された弁部材7の弁体部7aも、弁座部4aに対して傾斜等することなく安定して当接し、密閉状態を形成する。
図13及び図14に図示した実施例では、弁部材7の弁体部7a上であって、開口部4を覆う部分以外の複数箇所に通気用孔部7bを設けてなる。
負圧が生じていない図13の状態において、排水配管P内に負圧が発生すると、接続部3bと通気用孔部7bを介して弁部材の弁体部7aよりも上方が負圧となり、この負圧の作用によって、図14に示したように、弁部材7がバネ部材8の付勢に抗して上昇し、開口部4が開口する。開口部4が開口すると、排水配管P外の空気が排水配管P内に流入し、排水配管P内の負圧が解消され、弁部材7がバネ部材8の付勢によって降下し、開口部4を閉塞して、図13のように、排水配管P内から、排水配管P外への臭気や害虫類の逆流が防止された状態に戻る。
尚、図13及び図14に示した実施例も、第一実施例と同様に、弁部材7は、進退方向、この場合はガイド筒6の軸方向に垂直な面を基準とした面対称の形状として構成してなる。また、ガイド軸5は溝部5a備えた軸方向視略十字形状を成し、内面形状が円筒を成すガイド筒6との間に隙間空間を形成し、通気を容易に行うと共に、接触面積を小さくすることで摩擦抵抗を減らし、弁部材7の進退動作が容易となるようにしている。
The embodiments of the present invention are as described above, but the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist of the invention.
For example, in each of the above embodiments, the intake valve main body 3 and the cover member 2 are each provided with the guide cylinder 6 and the valve member 7 is provided with the guide shaft 5. However, the present invention is limited to the above embodiments. 13 and 14, the guide shaft 5 is fixed to the cover member 2 of the intake valve and the tip end of the guide shaft 5 is fixed to the intake valve main body 3 to prevent the guide shaft 5 from being inclined. Each of the receiving portions 9 may be provided, and the valve member 7 may include a guide cylinder 6 that is inserted through the guide shaft 5 and moves up and down. The receiving portion 9 illustrated in FIGS. 13 and 14 is configured integrally with the intake valve main body so as to have an arm portion on the front side and the rear side of the drawing and to be connected to the inner side surface of the intake valve main body 3. The upper part of the guide shaft 5 is configured and fixed integrally with the cover member 2, and the lower part of the guide shaft 5 is inserted into the receiving portion 9 and is also fixed, so that the guide shaft 5 does not tilt due to heat or stress. For this reason, the guide cylinder 6 guided by the guide shaft 5 and advanced and retracted to the upper limit and the valve body 7a of the valve member 7 formed integrally with the guide cylinder are not inclined with respect to the valve seat 4a. Abuts stably and forms a sealed state.
In the embodiment shown in FIGS. 13 and 14, ventilation holes 7 b are provided at a plurality of locations on the valve body 7 a of the valve member 7 other than the portion covering the opening 4.
In the state of FIG. 13 in which no negative pressure is generated, when a negative pressure is generated in the drainage pipe P, the pressure above the valve body portion 7a of the valve member becomes a negative pressure via the connection portion 3b and the vent hole portion 7b. Due to the action of the negative pressure, as shown in FIG. 14, the valve member 7 rises against the bias of the spring member 8, and the opening 4 opens. When the opening 4 is opened, air outside the drain pipe P flows into the drain pipe P, the negative pressure in the drain pipe P is eliminated, the valve member 7 is lowered by the bias of the spring member 8, and the opening 4 As shown in FIG. 13, the state returns to the state in which the backflow of odors and pests from the drainage pipe P to the outside of the drainage pipe P is prevented.
In the embodiment shown in FIGS. 13 and 14, the valve member 7 is also symmetrical with respect to a plane perpendicular to the axial direction of the guide cylinder 6 in this case, like the first embodiment. It is configured as a shape. Further, the guide shaft 5 has a substantially cross shape in the axial direction provided with the groove portion 5a, and a clearance space is formed between the guide shaft 5 and the guide tube 6 whose inner surface shape forms a cylinder to facilitate ventilation and reduce the contact area. By doing so, the frictional resistance is reduced and the valve member 7 can be easily moved back and forth.

また、上記実施例では、ガイド筒6内の空気を通気する通気構造を、ガイド軸5に設けた溝部5aによって構成しているが、本発明は上記実施例に限定されるものでは無く、例えばガイド筒6の内面に、上下に渡って通気のための溝部5aを設けても構わない。   Moreover, in the said Example, although the ventilation structure which ventilates the air in the guide cylinder 6 is comprised by the groove part 5a provided in the guide shaft 5, this invention is not limited to the said Example, For example, You may provide the groove part 5a for ventilation | gas_flowing over the inner surface of the guide cylinder 6 up and down.

1 ケーシング体 2 カバー部材
3 吸気弁本体 3a 四角柱部分
3b 接続部 4 開口部
4a 弁座部 5 ガイド軸
5a 溝部 6 ガイド筒
6a 通気穴 7 弁部材
7a 弁体部 7b 通気用孔部
8 バネ部材 9 受け部
C キャビネット部 L 通気路
P 排水配管 P1 被接続部
S 洗面台 T トラップ管
W 洗面ボウル
DESCRIPTION OF SYMBOLS 1 Casing body 2 Cover member 3 Intake valve main body 3a Square column part 3b Connection part 4 Opening part 4a Valve seat part 5 Guide shaft 5a Groove part 6 Guide cylinder 6a Vent hole 7 Valve member 7a Valve body part 7b Vent hole part 8 Spring member 9 Receiving part C Cabinet part L Ventilation path P Drainage pipe P1 Connected part S Wash stand T Trap pipe W Wash bowl

Claims (5)

配管の外部から内部への通気を行い、内部から外部への逆流を防止する吸気弁であって、
配管に接続される接続部を備えたケーシング体と、
ケーシング体の内外の通気を行うための、ケーシング体に設けた開口部と、
該開口部を閉塞する、開口部に対して進退自在に動作する動作部分である弁部材と、
弁部材の開口部への進退をガイドするガイド構造と、
弁部材を開口部に向けて付勢し、通常時開口部を閉塞状態とする付勢機構と、
から構成し、
動作部分である弁部材を、開口部を水密的に密閉するための弾性素材にて一体に成形したことを特徴とする吸気弁。
An intake valve that ventilates the pipe from the outside to the inside and prevents backflow from the inside to the outside.
A casing body provided with a connecting portion connected to the piping;
An opening provided in the casing body for ventilating the inside and outside of the casing body;
A valve member that is an operation portion that closes the opening and that moves freely with respect to the opening;
A guide structure for guiding the valve member to advance and retreat, and
An urging mechanism that urges the valve member toward the opening and normally closes the opening;
Consisting of
An intake valve characterized in that a valve member which is an operating part is integrally formed of an elastic material for hermetically sealing an opening.
上記吸気弁のガイド構造を、
弁部材又はケーシング体側のいずれか一方に設けたガイド軸と、
弁部材又はケーシング体側のいずれか他方に設けた、ガイド軸を進退自在に収納するガイド筒とから構成すると共に、
ガイド軸又はガイド筒に、ガイド筒内の空気をガイド筒外に通気させる通気構造を設けたことを特徴とする、請求項1に記載の吸気弁。
The intake valve guide structure
A guide shaft provided on either the valve member or the casing body side;
The guide member is provided on either the valve member or the casing body side, and includes a guide cylinder that accommodates the guide shaft so as to freely advance and retract.
The intake valve according to claim 1, wherein the guide shaft or the guide cylinder is provided with a ventilation structure that allows the air in the guide cylinder to vent outside the guide cylinder.
上記通気構造を、
ガイド軸の外側面又はガイド筒の内側面に設けた溝部によって設けたことを特徴とする、請求項2に記載の吸気弁。
The ventilation structure
The intake valve according to claim 2, wherein the intake valve is provided by a groove provided on an outer surface of the guide shaft or an inner surface of the guide cylinder.
上記吸気弁のガイド構造を、
弁部材又は配管側のいずれか一方に設けたガイド軸と、
弁部材又は配管側の他方に設けた、ガイド筒を進退自在に収納するガイド筒とから構成すると共に、
ガイド軸外側面と、ガイド筒内側面とを、軸方向視非相似形状とすることで、ガイド軸の外側面とガイド筒の内側面との間に非接触部分を生じるようにし、相似形状の場合に比較し接触面積を減じる構造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1つに記載の吸気弁。
The intake valve guide structure
A guide shaft provided on either the valve member or the piping side;
The guide member is provided on the other side of the valve member or the piping side, and the guide tube is configured to be retractable and retractable.
By making the outer surface of the guide shaft and the inner surface of the guide cylinder non-similar in the axial direction, a non-contact portion is formed between the outer surface of the guide shaft and the inner surface of the guide cylinder. The intake valve according to any one of claims 1 to 3, wherein a contact area is reduced as compared with a case.
上記吸気弁の弁部材を、
進退方向に垂直な面を基準とした面対称形状と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1つに記載の吸気弁。
The valve member of the intake valve
The intake valve according to any one of claims 1 to 4, wherein the intake valve has a plane symmetrical shape with respect to a plane perpendicular to the advancing / retreating direction.
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JP2015232369A (en) * 2014-06-10 2015-12-24 未来工業株式会社 Vent valve and piping structure

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Publication number Priority date Publication date Assignee Title
JP2022116124A (en) * 2020-12-14 2022-08-09 株式会社オンダ製作所 Drain pipe pressure regulation valve
JP7373123B2 (en) 2020-12-14 2023-11-02 株式会社オンダ製作所 Pressure regulating valve for drain pipe

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