JP4384441B2 - Packing and draining using this packing - Google Patents

Packing and draining using this packing Download PDF

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JP4384441B2
JP4384441B2 JP2003136294A JP2003136294A JP4384441B2 JP 4384441 B2 JP4384441 B2 JP 4384441B2 JP 2003136294 A JP2003136294 A JP 2003136294A JP 2003136294 A JP2003136294 A JP 2003136294A JP 4384441 B2 JP4384441 B2 JP 4384441B2
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annular
packing
lid
inspection
drainage
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JP2004340218A (en
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智和 岩下
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は開口に蓋体を密封可能に装着するパッキングとこのパッキングを使用した排水ますに関する。
【0002】
【従来の技術】
従来、排水ますとして種々の構造のものが知られているが、通常、側面に流入口と流出口が設けられ、上面に点検筒が設けられ、この点検筒の上端部には、蓋体が装着されている。
排水ますは、下水管路の合流部、曲がり部、段差部、管路点検部等に設置されるもので、1〜複数の流入口に家庭からの排水管や上流からの下水管路が接続され、流出口に下水管路が接続される。
これらの排水ますにおいては、下水管路の点検や清掃のために、点検筒が立ち上げられている。この点検筒は、流入口と流出口を有する排水ます本体と一体に形成されていてもよいが、排水ます本体の上面に点検筒接続口が設けられ、この点検筒接続口に点検筒が接続されていると、排水ますの設置現場に合わせて点検筒の長さを変更できる。
【0003】
これらの排水ますの点検筒は機械的強度が不足することから、通常、道路に露出する部分に、この点検筒を保護するために鋳鉄製の保護筺蓋を有する保護筺(業界では鋳鉄製防護ハットと言われている。)を設けることが知られている(例えば、特許文献1参照。)。
これらの排水ますは施工された後に、流入口や流出口に塵埃や汚物が付着して詰まることがあるので、時々、保護筺蓋と点検筒の蓋体とを開けて、内部を点検し、詰まっていたら、この点検筒の開口から掃除具を挿入して、掃除する。
この特許文献1に記載の保護筺蓋や点検筒の蓋は、単に嵌合して取り付けられているだけであるので、寸法誤差や変形により隙間が生ずることがあり、密封性が十分でないことが多い。
【0004】
排水ますの保護筺蓋や点検筒の蓋に密封性が十分でないと、雨水が浸入して下水処理量が増加したり、下水管路内の空気圧の変動により臭気が放出されて環境の悪化をきたすなどの問題があった。
点検筒と蓋との密封性を保つものとして、「点検筒6の上方開口部には、いわゆるVUパイプ内径接合方式として、図2で示すように塩ビ射出成形品である受枠(蓋用枠)7が接着剤を介して嵌合される。この受枠7にパッキン8を介して塩ビ製の円板状の蓋9が開閉自在に密接嵌合される。」との記載および図1〜2を参照すると、蓋の外周に設けた環状溝に断面V字状の環状パッキンを装着して密接嵌合することが知られている(例えば、特許文献2参照。)。
【0005】
【特許文献1】
特開平7−189332号公報 (段落番号0003、図1−2)
【特許文献2】
特開平8−326139号公報 (段落番号0006、図1−2)
【0006】
【発明が解決しようとする課題】
しかし、排水ますの点検筒の上端に取り付けられている蓋に断面V字状のパッキングが装着されていると、確かに、寸法誤差が吸収されて密封性は向上し、雨水の浸入や臭気の発散は無くなるが、ゴム製のパッキングを圧縮させた状態で嵌合されているため、滑り難く、蓋の点検筒上端への取付けおよび取外しが円滑に行えない、という問題があった。
【0007】
この問題を解消する方法として、蓋にVパッキングを装着する時、Vパッキングに滑剤を塗布する方法や、Vパッキングの材料となるゴムにオイルを配合したオイル含有ゴムで成形したVパッキングを使用し、オイルを徐々にしみ出させる方法が行われている。
しかし、滑剤を塗布する方法では、数回の蓋の取付け、取外しで滑剤が無くなって、蓋の取付け、取外しが円滑に行えなくなる。また、オイル含有Vパッキングでは、JIS規格におけるオゾン劣化試験で亀裂が発生する問題があり、更に、経年劣化により、オイルが無くなると蓋の取付け、取外しが円滑に行えなくなる。
【0008】
【課題を解決するための手段】
この発明は、上述のような特許文献1および2に記載の排水ますにおける点検筒と蓋体との密封性の改善に好適なパッキングおよびこのパッキングを使用した排水ますを提供することを目的とする。
【0009】
請求項1記載のパッキングは、管体開口に蓋体を挿入して密封するために使用される環状弾性体からなるパッキングであって、断面略矩形の環状弾性本体の内周面両端には、蓋体の管体開口への挿入部外周に設けられた断面凹形の環状溝の隅角部に嵌り合う突条が周方向に設けられると共に前記突条間には左右相称で、前記環状弾性本体の径方向の厚さの10〜50%程度の環状の窪みが径方向に延設され、前記窪みの最深部に対応する環状弾性本体外周面には、外面が滑らかな曲面を描きつつ、太い基部から先細部を経て先端部に円みを有する環状突片が水平方向に突設されていることを特徴とする。
このように断面略矩形の環状弾性本体の内周面両端に形成された周方向の突条と、この突条間に形成された左右相称で、前記環状弾性本体の径方向の厚さの10〜50%程度の径方向に延設された環状の窪みにより、このパッキングを管体開口への挿入部外周に設けられた断面凹形の環状溝の隅角部に蓋体の環状溝に嵌め合わせると、パッキングの弾性変形により環状溝に隙間無く接触して装着できるので、蓋体のパッキング装着溝からの漏れや流入および臭気の放出はなくなる。
また、環状弾性体の窪みの最深部に対応する環状弾性本体外周面には、外面が滑らかな曲面を描きつつ、太い基部から先細部を経て先端部に円みを有する環状突片が水平方向に突設されていて、管体開口に蓋体を挿入した時、この環状突片の円みを有する先端部が管体開口内面に接触して折れ曲がって、蓋体と管体開口との間隙を密封するので、蓋体と管体開口との嵌合に寸法誤差があっても密封性よく蓋体を管体開口に装着できる。
【0011】
また、請求項記載の排水ますは、側面に流入口と流出口とが設けられ、上面に点検筒
が設けられた排水ますにおいて、この点検筒上端に取付けられた蓋体の点検筒への挿入部外周に断面凹形の環状溝が設けられ、この環状溝に請求項1記載のパッキングが装着されて、前記環状突片が斜め上方に折れ曲がって、その先端部が点検筒内面に接していることを特徴とする。
この排水ますは、蓋体の外周に設けられた環状溝に請求項1記載のパッキングが装着さ れて、前記環状突片が斜め上方に折れ曲がって、その先端部が点検筒内面に接しているので、蓋体外面と点検筒内面との間に間隙があっても、パッキングの環状突片の円みを有する先端部が点検口内面に折れ曲がって接触して、蓋体と点検筒との間隙を密封するので、蓋体と点検筒との嵌合に寸法誤差があっても密封性よく蓋体を点検筒に装着でき、雨水の浸入や臭気もれを防ぐことができる。また、取付け、取外しが容易である。
【0013】
【発明の実施の形態】
この発明のパッキングとこのパッキングを使用した排水ますを図面を参照して説明する。
図1はこの発明のパッキングの一実施例を示す正面図、図2(イ)は図1に示すパッキングの断面図、(ロ)は他の変形例を示す断面図、図3はこの発明のパッキングの他の実施例を示す正面図である。図で、1はパッキングで、このパッキング1は、蓋体の外周に形成された断面凹形の環状溝に嵌まり合う環状弾性本体11と、この環状弾性本体11の内周面両端近くに周方向に設けられた突条12、12と、この突条12、12間の環状の窪み13と、環状弾性本体11の外周に形成された先端部に円み部15を有する環状突片14とからなっている。
このパッキング1は、スチレン−ブタジエンゴム等の合成ゴム等の弾性材料を成形して製造される。ゴム硬度は、デュロメータ硬度で50〜55度程度であるのが好ましい。
【0014】
環状弾性本体11は、蓋体の外周に形成された凹形環状溝に嵌まり合う寸法となされ、突条12、12は、パッキング1とこの凹形環状溝との間からの水漏れを防止するために設けられる。
環状突片14は、開口に蓋体を取付け、取外しするとき、図5、6に示すように反転変形する。これは、開口の内径と蓋体の開口への挿入部外径との寸法誤差が最大となっても密封性が確保され、かつ、蓋体の取付け、取外しの抵抗力を減少するためであり、その寸法や形状は、開口と蓋体との許容差、パッキング1と凹形環状溝との間の密封性および環状突片14の反転変形の容易さを考慮して決められる。
また、この環状突片14の外周先端部は、断面円みを持った形状になされていて、この環状突片14がどの方向に変形しても止水性が確保されるようになっている。
また、蓋体の取付け、取外し時に、環状突片14が反転変形するが、突条12、12間に環状の窪み13を形成すると、反転変形の抵抗力が低減する。この窪み13は、あまり大きくするとパッキング1と凹形環状溝との密封性が損なわれるので、環状弾性本体11の厚さの10〜50%程度の窪みとするのがよい。
【0015】
また、環状突片14の反転変形の抵抗力をより減少するために、図2(ロ)に示すように、パッキング1bの窪み13bの中間位置に周方向の切り込み13cを設けてもよい。
【0016】
上記図1、2に示すパッキング1は、蓋体の開口への挿入部外周に設けられる凹形環状溝に装着して使用されるものであるが、この発明のパッキングは図3に示すような開口の内周面に設けられる凹形環状溝に装着されて使用されるものであってもよい。
このパッキング1aは、開口の内周面に設けられる凹形環状溝に嵌まり合う環状弾性本体11aと、この環状弾性本体11aの外周面の両端近くに周方向に設けられた突条12a、12aと、この突条12a、12a間の環状の窪み13aと、環状弾性本体11aの内周中間に形成された先端部に円み部15aを有する環状突片14aとからなっている。
【0017】
次に、図1に示すパッキング1を使用した排水ますの実施例を図4〜6に基づいて説明する。図4はこの発明の排水ますの一実施例を一部断面で示す側面図、図5は図4の一部分を拡大して示す拡大部分断面図、図6は図5の蓋体を取外すときの状態を示す説明図である。
図で、2は排水ますであり、この排水ます2は、排水ます本体3と点検筒4と点検筒4の上端部に装着された蓋体5とからなる。
排水ます本体3には、側面に流入口31と流出口32とが設けられ、上面側に点検筒接続口33がそれぞれ設けられている。
点検筒4は排水ます本体3の上面側に設けられた点検筒接続口33に接続されている。この点検筒4の上端には、蓋体5が取り付けられている。
点検筒4は、硬質塩化ビニル樹脂管等の合成樹脂管が使用され、排水ます2の設置現場で、排水ます本体3の埋設深さに対応して適切な長さに切断して使用される。
【0018】
蓋体5には取付け、取外しに便利なように把手51が設けられ、点検筒4の上端部に嵌合する下面挿入部52には、外周に凹形環状溝53が形成され、この凹形環状溝53には、前記パッキング1が装着されている。
この蓋体5を点検筒4に取付けるには、把手51を持って点検筒4の上端部に挿入部52を当てがって押し込めばよい。パッキング1は、蓋体5の挿入部52より外方に突出している環状突片14が、点検筒4の内面に当たって、図5に示すように後ろ向きに変形し、この環状突片14の先端部の円み部15が点検筒4の内面を摺動して嵌合し、取付けられる。
【0019】
排水ます本体3の流入口31に家庭から配管された排水管34が接続され、流出口32には下水管35が接続されている。
また、6は鋳鉄製防護ハットで、排水ます2に車両等の重量が直接かかるのを防止するために設置される。この防護ハット6は、鋳鉄製の枠体61が点検筒4の上部を覆うようにして台座リング7の上に設置され、枠体61の上面には鋳鉄製の蓋62が取外し自在に取付けられている。尚、この防護ハット6の上面は道路等の地上に顕れていて、地上から蓋62を外し、防護ハット6の中にある点検筒4の蓋体5を取外すと、排水ます2の内部を点検、清掃できるようになっている。
【0020】
そして、排水ます2の内部を点検、清掃する際には、防護ハット6の蓋62と点検筒4の上端部に装着された蓋体5を取外すが、蓋体5を取外すとき、蓋体5の挿入部52に設けられた凹形環状溝53に装着されているパッキング1は、図6に示すように、その外周に形成されている環状突片14が、挿入時の変形方向から反対側に反転変形して、環状突片14の先端の円み部15が点検筒4の内面を摺動して取外される。
このように、蓋体5の取付け、取外しに当たって、パッキング1は、環状突片14が反転変形して、取付け、取外しが行われるため、蓋体5の取付け、取外しの抵抗力が低減され、容易に取付け、取外しを行うことができる。
【0021】
尚、この発明においては、図3に示すパッキング1aを点検筒4の上端内部に設けた凹形環状溝に装着し、凹形環状溝を設けていない挿入部52を有する蓋体5を点検筒4に取付けるようにしてもよい。
【0022】
【発明の効果】
請求項1記載のパッキングは、管体開口に蓋体を挿入して密封するために使用される環状弾性体からなるパッキングであって、断面略矩形の環状弾性本体の内周面両端には、蓋体の管体開口への挿入部外周に設けられた断面凹形の環状溝の隅角部に嵌り合う突条が周方向に設けられると共に前記突条間には左右相称で、前記環状弾性本体の径方向の厚さの10〜50%程度の環状の窪みが径方向に延設され、前記窪みの最深部に対応する環状弾性本体外周面には、外面が滑らかな曲面を描きつつ、太い基部から先細部を経て先端部に円みを有する環状突片が水平方向に突設されているので、突条とこの突条間に形成された左右相称で、前記環状弾性本体の径方向の厚さの10〜50%程度の径方向に延設された環状の窪みによるパッキングの弾性変形により、パッキングと蓋体の環状溝とが隙間無く接触して装着できるので、パッキング装着溝パッキングの間からの漏れや流入および臭気の放出を無くすことができる。
また、蓋体の取付け、取外しに当たっては、環状突片が折れ曲がって反転変形し、環状突片の先端円み部が摺動するので、蓋体と管体開口との嵌合に寸法誤差があっても密封性よく蓋体を管体開口に装着できる。また、蓋体の取付け、取外し時には、環状突片が反転変形するので、パッキングの摺動抵抗力が減少して容易に取付け、取外しできる。
【0023】
また、請求項記載の排水ますは、側面に流入口と流出口とが設けられ、上面に点検筒
が設けられた排水ますにおいて、この点検筒上端に取付けられた蓋体の点検筒への挿入部外周に断面凹形の環状溝が設けられ、この環状溝に請求項1記載のパッキングが装着されて、前記環状突片が斜め上方に折れ曲がって、その先端部が点検筒内面に接しているので、蓋体外面と点検筒内面との間に間隙があっても、パッキングの環状突片の円みを有する先端部が点検口内面に折れ曲がって接触して、蓋体と点検筒との間隙を密封するので、蓋体と点検筒との嵌合に寸法誤差があっても密封性よく蓋体を点検筒に装着でき、雨水の浸入や臭気もれを防ぐことができる。また、取付け、取外しが容易である。
【図面の簡単な説明】
【図1】この発明のパッキングの一実施例を一部断面で示す正面図である。
【図2】この発明のパッキングの断面図で、(イ)は図1に示すパッキングの断面図、(ロ)は他の変形例を示す断面図である。
【図3】この発明のパッキングの参考例を一部断面で示す正面図である。
【図4】この発明の排水ますの一実施例を一部断面で示す側面図である。
【図5】図4の一部分を拡大して示す拡大部分断面図である。
【図6】図5の蓋体を取外すときの状態を示す説明図である。
【符号の説明】
1、1a パッキング
11、11a 環状弾性本体
12、12a 突条
13、13a 環状の窪み
14、14a 環状突片
15、15a 円み部
2 排水ます
3 排水ます本体
31 流入口
32 流出口
4 点検筒
5 蓋体
52 挿入部
53 凹形環状溝
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packing for sealingly attaching a lid to an opening and a drainage drain using this packing.
[0002]
[Prior art]
Conventionally, drainage tanks of various structures are known, but usually, an inlet and an outlet are provided on the side surface, an inspection cylinder is provided on the upper surface, and a lid is provided at the upper end of the inspection cylinder. It is installed.
Drainage basins are installed at the merging section, bend section, step section, pipe inspection section, etc. of the sewage pipe line, and drainage pipes from the home and sewage pipes from the upstream are connected to one or more inlet And a sewer pipe is connected to the outlet.
In these drains, an inspection cylinder is set up for inspection and cleaning of the sewage pipe. This inspection tube may be formed integrally with the drainage drainage main body having an inlet and an outlet, but the inspection cylinder connection port is provided on the upper surface of the drainage drainage main body, and the inspection cylinder is connected to this inspection cylinder connection port. If so, the length of the inspection tube can be changed according to the installation site of the drainage.
[0003]
Because these drainage inspection cylinders lack mechanical strength, they are usually protected on the exposed parts of the road with protective cast iron lids (in the industry, cast iron protection). It is known to provide a hat (referred to as Patent Document 1, for example).
After these drains are installed, dust and dirt may adhere to the inlet and outlet, and sometimes clog up. Sometimes, open the protective lid and the lid of the inspection tube, and check the inside. If it is clogged, clean it by inserting a cleaning tool through the opening of this cylinder.
Since the protective cover and the cover of the inspection cylinder described in Patent Document 1 are simply fitted and attached, gaps may occur due to dimensional errors or deformation, and the sealing performance may not be sufficient. Many.
[0004]
If the protection lid of the drainage drainage lid or the lid of the inspection tube is not sufficiently sealed, rainwater will infiltrate and increase the amount of sewage treatment, or the odor will be released due to fluctuations in the air pressure in the sewage pipes, causing deterioration of the environment There was a problem such as coming.
In order to maintain the sealing property between the inspection cylinder and the lid, “the upper opening portion of the inspection cylinder 6 is a so-called VU pipe inner diameter joining method, and a receiving frame (lid frame) which is a PVC injection molded product as shown in FIG. 7 is fitted through an adhesive, and a vinyl disc-shaped lid 9 is closely fitted to the receiving frame 7 through a packing 8 so as to be openable and closable. Referring to it, it is known that an annular packing having a V-shaped cross section is fitted into an annular groove provided on the outer periphery of the lid and closely fitted (see, for example, Patent Document 2).
[0005]
[Patent Document 1]
JP-A-7-189332 (paragraph number 0003, FIG. 1-2)
[Patent Document 2]
JP-A-8-326139 (paragraph number 0006, FIG. 1-2)
[0006]
[Problems to be solved by the invention]
However, if the lid attached to the upper end of the drainage cylinder is fitted with a V-shaped packing, the dimensional error will be absorbed and the sealing performance will be improved. Although there is no divergence, there is a problem that since the rubber packing is fitted in a compressed state, it is difficult to slip and the lid cannot be smoothly attached to and removed from the upper end of the inspection tube.
[0007]
To solve this problem, use a method of applying a lubricant to the V-packing when mounting the V-packing on the lid, or use a V-packing molded with an oil-containing rubber in which oil is blended with the rubber used as the V-packing material. A method of oozing oil is gradually performed.
However, in the method of applying the lubricant, the lubricant is lost after several times of attaching and removing the lid, and the attachment and removal of the lid cannot be performed smoothly. In addition, the oil-containing V-packing has a problem that cracks are generated in an ozone deterioration test in JIS standards. Further, due to aging deterioration, when oil is exhausted, the lid cannot be attached or removed smoothly.
[0008]
[Means for Solving the Problems]
It is an object of the present invention to provide a packing suitable for improving the sealing performance between the inspection cylinder and the lid body in the drainage basin described in Patent Documents 1 and 2 as described above, and a drainage basin using this packing. .
[0009]
The packing according to claim 1 is a packing made of an annular elastic body used for inserting and sealing a lid into a tube opening, and at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section , Rutotomoni ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid is provided in the circumferential direction, between the ridges in bilaterally, the An annular recess of about 10-50% of the radial thickness of the annular elastic body extends in the radial direction, and the outer surface of the annular elastic body corresponding to the deepest part of the depression has a smooth curved surface. On the other hand, an annular projecting piece having a rounded shape at a tip end portion is provided in a horizontal direction from a thick base portion through a tapered portion.
As described above, the circumferential protrusions formed at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section, and the left and right synonyms formed between the protrusions, the radial thickness of the annular elastic body is 10. This packing is fitted into the annular groove of the lid body at the corner of the annular groove having a concave cross section provided on the outer periphery of the insertion portion into the tube opening by an annular recess extending in the radial direction of about 50%. In addition, since the elastic deformation of the packing allows the ring groove to contact and be installed without any gap, leakage, inflow and odor release from the packing mounting groove of the lid body are eliminated.
Further, the annular elastic body outer peripheral surface corresponding to the deepest portion of the recess of the annular elastic Body, while drawing the outer surface smooth curved surface, an annular protrusion having a Marmi the tip through the tapered from a thick base horizontal have been projected in a direction, upon insertion of the lid into the tube opening, bent tip having a Marmi of the annular protrusion is in contact with the tube opening inner surface of the lid and the tube opening because sealing the gap, even if dimensional errors in the fitting of the lid and the tube opening can be mounted a sealing good lid to the tube opening.
[0011]
Further, the drainage basin according to claim 2 is provided with an inlet and an outlet on the side surface and an inspection cylinder is provided on the upper surface. The lid attached to the upper end of the inspection cylinder is connected to the inspection cylinder. An annular groove having a concave cross section is provided on the outer periphery of the insertion portion, and the packing according to claim 1 is attached to the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube. It is characterized by being.
The drainage basin is mounted with the packing according to claim 1 in an annular groove provided on the outer periphery of the lid, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection cylinder . Therefore, even if there is a gap between the outer surface of the lid and the inner surface of the inspection tube, the rounded tip of the ring-shaped protruding piece of the packing bends and contacts the inner surface of the inspection port, and the gap between the lid and the inspection tube Therefore, even if there is a dimensional error in the fitting between the lid and the inspection cylinder, the lid can be attached to the inspection cylinder with good sealing performance, and rainwater intrusion and odor leakage can be prevented. In addition, it is easy to install and remove.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The packing of the present invention and the drainage basin using this packing will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of the packing of the present invention, FIG. 2 (a) is a cross-sectional view of the packing shown in FIG. 1, (b) is a cross-sectional view showing another modification, and FIG. It is a front view which shows the other Example of packing. In the figure, reference numeral 1 denotes a packing. The packing 1 has an annular elastic body 11 that fits in an annular groove having a concave cross section formed on the outer periphery of the lid, and a circumferential portion near both ends of the inner peripheral surface of the annular elastic body 11. Ridges 12, 12 provided in the direction, an annular recess 13 between the ridges 12, 12, an annular protrusion 14 having a rounded portion 15 at the tip formed on the outer periphery of the annular elastic body 11, It is made up of.
The packing 1 is manufactured by molding an elastic material such as synthetic rubber such as styrene-butadiene rubber. The rubber hardness is preferably about 50 to 55 degrees in durometer hardness.
[0014]
The annular elastic body 11 is dimensioned to fit into a concave annular groove formed on the outer periphery of the lid, and the protrusions 12 and 12 prevent water leakage from between the packing 1 and the concave annular groove. To be provided.
The annular projecting piece 14 is inverted and deformed as shown in FIGS. 5 and 6 when a lid is attached to and removed from the opening. This is because the sealing performance is secured even when the dimensional error between the inner diameter of the opening and the outer diameter of the insertion portion into the opening of the lid is maximized, and the resistance of attaching and removing the lid is reduced. The dimensions and shape are determined in consideration of the tolerance between the opening and the lid, the sealing property between the packing 1 and the concave annular groove, and the ease of reversal deformation of the annular projecting piece 14.
Moreover, the outer peripheral front end portion of the annular projecting piece 14 is formed in a shape having a round cross section, so that water blocking is ensured regardless of which direction the annular projecting piece 14 is deformed.
In addition, when the lid is attached or detached, the annular protrusion 14 is deformed in an inverted manner. However, if the annular recess 13 is formed between the protrusions 12 and 12, the resistance to the inversion deformation is reduced. If this recess 13 is made too large, the sealing performance between the packing 1 and the concave annular groove is impaired, so it is preferable to make the recess 13 approximately 10 to 50% of the thickness of the annular elastic body 11.
[0015]
Further, in order to further reduce the resistance to reversal deformation of the annular projecting piece 14, a circumferential cut 13c may be provided at an intermediate position of the recess 13b of the packing 1b as shown in FIG.
[0016]
The packing 1 shown in FIGS. 1 and 2 is used by being attached to a concave annular groove provided on the outer periphery of the insertion portion to the opening of the lid, but the packing of the present invention is as shown in FIG. It may be used by being mounted in a concave annular groove provided on the inner peripheral surface of the opening.
The packing 1a includes an annular elastic body 11a that fits into a concave annular groove provided on the inner peripheral surface of the opening, and protrusions 12a and 12a provided in the circumferential direction near both ends of the outer peripheral surface of the annular elastic body 11a. And an annular recess 13a between the ridges 12a, 12a, and an annular protrusion 14a having a rounded portion 15a at the tip end formed in the middle of the inner periphery of the annular elastic body 11a.
[0017]
Next, an embodiment of the drainage basin using the packing 1 shown in FIG. 1 will be described based on FIGS. 4 is a side view showing a part of the embodiment of the drainage basin according to the present invention, FIG. 5 is an enlarged partial sectional view showing a part of FIG. 4 in an enlarged manner, and FIG. 6 is a view when removing the lid of FIG. It is explanatory drawing which shows a state.
In the figure, reference numeral 2 denotes a drainage drain, which is composed of a drainage drain main body 3, an inspection cylinder 4, and a lid 5 attached to the upper end portion of the inspection cylinder 4.
The drainage main body 3 is provided with an inlet 31 and an outlet 32 on the side surface and an inspection tube connection port 33 on the upper surface side.
The inspection cylinder 4 is connected to an inspection cylinder connection port 33 provided on the upper surface side of the drainage drain main body 3. A lid 5 is attached to the upper end of the inspection cylinder 4.
The inspection cylinder 4 is made of a synthetic resin pipe such as a hard polyvinyl chloride resin pipe, and is used by cutting it to an appropriate length corresponding to the embedding depth of the drainage body 3 at the installation site of the drainage tank 2. .
[0018]
A handle 51 is provided on the lid 5 for convenient attachment and removal, and a concave annular groove 53 is formed on the outer periphery of the lower surface insertion portion 52 fitted to the upper end portion of the inspection tube 4. The packing 1 is mounted in the annular groove 53.
In order to attach the lid 5 to the inspection tube 4, it is only necessary to hold the handle 51 and press the insertion portion 52 against the upper end of the inspection tube 4. In the packing 1, the annular projecting piece 14 projecting outward from the insertion portion 52 of the lid 5 hits the inner surface of the inspection tube 4 and deforms backward as shown in FIG. The rounded portion 15 is fitted by sliding on the inner surface of the inspection tube 4.
[0019]
A drain pipe 34 piped from home is connected to the inlet 31 of the drainage main body 3, and a sewage pipe 35 is connected to the outlet 32.
Reference numeral 6 denotes a cast iron protective hat, which is installed in order to prevent the weight of a vehicle or the like from being directly applied to the drain 2. This protective hat 6 is installed on the pedestal ring 7 so that a cast iron frame 61 covers the upper part of the inspection cylinder 4, and a cast iron lid 62 is detachably attached to the upper surface of the frame 61. ing. The upper surface of the protective hat 6 is visible on the ground such as roads. When the lid 62 is removed from the ground and the cover 5 of the inspection cylinder 4 in the protective hat 6 is removed, the inside of the drainage tank 2 is inspected. Can be cleaned.
[0020]
When inspecting and cleaning the inside of the drainage basin 2, the lid 62 attached to the top 62 of the protective hat 6 and the inspection cylinder 4 is removed, but when the lid 5 is removed, the lid 5 As shown in FIG. 6, the packing 1 attached to the concave annular groove 53 provided in the insertion portion 52 has an annular projecting piece 14 formed on the outer periphery thereof on the opposite side from the deformation direction at the time of insertion. Then, the rounded portion 15 at the tip of the annular projecting piece 14 slides on the inner surface of the inspection tube 4 and is removed.
In this way, when attaching and removing the lid 5, the packing 1 is attached and removed because the annular projecting piece 14 is inverted and deformed, so that the resistance of attachment and removal of the lid 5 is reduced and easy. Can be attached to and detached from.
[0021]
In the present invention, the packing 1a shown in FIG. 3 is attached to the concave annular groove provided in the upper end of the inspection cylinder 4, and the lid 5 having the insertion portion 52 not provided with the concave annular groove is provided in the inspection cylinder. 4 may be attached.
[0022]
【The invention's effect】
The packing according to claim 1 is a packing made of an annular elastic body used for inserting and sealing a lid into a tube opening, and at both ends of the inner peripheral surface of the annular elastic body having a substantially rectangular cross section , Rutotomoni ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid is provided in the circumferential direction, between the ridges in bilaterally, the An annular recess of about 10-50% of the radial thickness of the annular elastic body extends in the radial direction, and the outer surface of the annular elastic body corresponding to the deepest part of the depression has a smooth curved surface. On the other hand, since the annular projecting piece having a rounded shape at the tip part from the thick base part is projected in the horizontal direction, the left and right synonyms formed between the projecting ridge and the projecting ridge , packing according indentations in the radial direction extending in the radial direction of about 10 to 50% of the thickness of the annular By elastic deformation, since the annular groove of the packing and the lid can be mounted in contact without gap, it can be eliminated leakage and influx and release of odors from between the packing mounting groove and a packing.
Also, when attaching or removing the lid, the annular protrusion is bent and inverted and deformed, and the rounded end of the annular protrusion slides, so there is a dimensional error in the fitting between the lid and the tube opening. However, the lid can be attached to the tube opening with good sealing performance. Further, when the lid is attached or removed, the annular projecting piece is inverted and deformed, so that the sliding resistance force of the packing is reduced and can be easily attached and detached.
[0023]
Further, the drainage basin according to claim 2 is provided with an inlet and an outlet on the side surface and an inspection cylinder is provided on the upper surface. The lid attached to the upper end of the inspection cylinder is connected to the inspection cylinder. An annular groove having a concave cross section is provided on the outer periphery of the insertion portion, and the packing according to claim 1 is attached to the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube. Therefore, even if there is a gap between the outer surface of the lid and the inner surface of the inspection tube, the rounded tip of the annular projecting piece of the packing bends and contacts the inner surface of the inspection port. Since the gap is sealed, even if there is a dimensional error in the fitting between the lid and the inspection cylinder, the lid can be attached to the inspection cylinder with good sealing performance, and rainwater intrusion and odor leakage can be prevented. In addition, it is easy to install and remove.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a packing according to the present invention in partial cross section.
2A and 2B are cross-sectional views of the packing of the present invention, wherein FIG. 2A is a cross-sectional view of the packing shown in FIG. 1, and FIG. 2B is a cross-sectional view showing another modification.
FIG. 3 is a front view showing a reference example of the packing of the present invention in a partial cross section.
FIG. 4 is a side view partially showing a cross section of an embodiment of the drainage basin of the present invention.
FIG. 5 is an enlarged partial cross-sectional view showing a part of FIG. 4 in an enlarged manner.
6 is an explanatory view showing a state when the cover body of FIG. 5 is removed. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 1a Packing 11, 11a Annular elastic body 12, 12a Protrusion 13, 13a Annular depression 14, 14a Annular protrusion 15, 15a Round part 2 Drain 3 Drain main body 31 Inlet 32 Outlet 4 Inspection cylinder 5 Lid 52 Insertion 53 Recessed annular groove

Claims (2)

管体開口に蓋体を挿入して密封するために使用される環状弾性体からなるパッキングであって、
断面略矩形の環状弾性本体の内周面両端には、蓋体の管体開口への挿入部外周に設けられた断面凹形の環状溝の隅角部に嵌り合う突条が周方向に設けられると共に
前記突条間には左右相称で、前記環状弾性本体の径方向の厚さの10〜50%程度の環状の窪みが径方向に延設され、
前記窪みの最深部に対応する環状弾性本体外周面には、外面が滑らかな曲面を描きつつ、太い基部から先細部を経て先端部に円みを有する環状突片が水平方向に突設されていることを特徴とするパッキング。
A packing made of an annular elastic body used to insert and seal the lid into the tube opening,
The inner peripheral surface at both ends of a substantially rectangular annular elastic body, disposed ridges fitted to the corners of the recessed section of the annular groove provided in the insertion portion outer periphery of the tube opening of the lid body in the circumferential direction is Rutotomoni,
Wherein the inter-ridge with bilaterally, the recess of the annular resilient body 10% to 50% approximately of the annular radial thickness extends radially
On the outer peripheral surface of the annular elastic main body corresponding to the deepest part of the depression, an annular projecting piece having a rounded shape from the thick base part to the tip part is projected in the horizontal direction while the outer surface draws a smooth curved surface. Packing characterized by being.
側面に流入口と流出口とが設けられ、上面に点検筒が設けられた排水ますにおいて、この点検筒上端に取付けられた蓋体の点検筒への挿入部外周に断面凹形の環状溝が設けられ、この環状溝に請求項1記載のパッキングが装着されて、前記環状突片が斜め上方に折れ曲がって、その先端部が点検筒内面に接していることを特徴とする排水ます。In the drainage drain with an inlet and outlet on the side and an inspection cylinder on the upper surface, an annular groove having a concave cross section is formed on the outer periphery of the insertion portion of the lid attached to the upper end of the inspection cylinder. Drainage is characterized in that the packing according to claim 1 is installed in the annular groove, the annular projecting piece is bent obliquely upward, and its tip is in contact with the inner surface of the inspection tube .
JP2003136294A 2003-05-14 2003-05-14 Packing and draining using this packing Active JP4384441B2 (en)

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EP1850039A4 (en) * 2005-02-18 2011-07-20 Nok Corp Sealing structure using gasket
JP4827038B2 (en) * 2008-08-06 2011-11-30 株式会社ヒロハマ Cap unit
US8110016B2 (en) * 2008-12-11 2012-02-07 Dow Global Technologies Llc Fluid filter assembly including seal
JP5785395B2 (en) * 2011-01-12 2015-09-30 Agcテクノグラス株式会社 Container open / close lid and container with open / close lid
JP5376176B2 (en) * 2011-06-02 2013-12-25 株式会社ヒロハマ Cap unit
CN102518798B (en) * 2011-12-31 2015-01-07 浙江世泰实业有限公司 Sealing component for special shaped inner wall
JP6459534B2 (en) * 2015-01-16 2019-01-30 タイガー魔法瓶株式会社 Beverage container

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