JPS5934617Y2 - manhole cover - Google Patents
manhole coverInfo
- Publication number
- JPS5934617Y2 JPS5934617Y2 JP2767680U JP2767680U JPS5934617Y2 JP S5934617 Y2 JPS5934617 Y2 JP S5934617Y2 JP 2767680 U JP2767680 U JP 2767680U JP 2767680 U JP2767680 U JP 2767680U JP S5934617 Y2 JPS5934617 Y2 JP S5934617Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust valve
- cover
- lid
- exhaust
- top surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
【考案の詳細な説明】
この考案は、下水道などに施設されるマンホールの蓋に
関するものである。[Detailed description of the invention] This invention relates to a manhole cover installed in a sewer system or the like.
従来、下水道などに設けられるマンホールの蓋は、汚水
の停滞により汚水中の有機物が腐敗発酵し、メタンガス
、炭酸ガス等が発生するので排気孔を有する蓋が使用さ
れてきたが、近時アーケード街や商店街の歩道等、人の
通行の多い道路に設けられるマンホールには汚水より発
生する悪臭を防ぐため密閉式の通気孔のない蓋が使用さ
れるようになって来た。Conventionally, manhole covers installed in sewers, etc., have been used with exhaust holes because organic matter in the sewage rots and ferments due to stagnation of sewage, producing methane gas, carbon dioxide gas, etc.; In order to prevent bad odors from sewage, closed-type lids without vents have come to be used for manholes installed on roads with a lot of foot traffic, such as sidewalks in shopping districts and shopping streets.
然し乍ら、排水設備が完備した現在においても、降雨な
どによる一時的流水の増加により内圧が加わった時の排
気、或いは汚水の一時的停滞による有機物の腐敗、発酵
によるガスの発生時における排気は欠くことのできない
ものである。However, even in the present day when drainage facilities are fully equipped, there is a lack of exhaust when internal pressure is added due to a temporary increase in flowing water due to rain, or when gas is generated due to decay of organic matter or fermentation due to temporary stagnation of sewage. It is something that cannot be done.
これがため実公昭50−39972号に見られる如く中
蓋を設け、中蓋にボール弁を付設し、ガス等が発生した
場合ボールを押し上げ排気するよう考案されたものがあ
るが、中蓋を設けるため内部の点検掃除は容易でなく、
設備費が高くなることはさけられないものであった。For this reason, as seen in Utility Model Publication No. 50-39972, some designs have been devised in which an inner lid is provided, a ball valve is attached to the inner lid, and when gas etc. is generated, the ball is pushed up and evacuated. Therefore, it is not easy to inspect and clean the inside.
Higher equipment costs were unavoidable.
本考案は、下水道のマンホール内に一時的に内圧が加わ
った時に排気を容易にし、内蓋等を設けてないので内部
の点検掃除も容易となりガス等の発生原因を容易に取除
くことのできるマンポールの蓋を提供するものである。This invention makes it easier to vent when internal pressure is temporarily applied inside the sewer manhole, and since there is no inner cover, it is easy to inspect and clean the inside, and the cause of gas generation can be easily removed. It provides a cover for the manpole.
本考案の実施例を図面に従って説明するに、第1図はマ
ンホールの蓋を上より見た図で、通常鋳鉄製或いは鉄製
で枠、底板が作られた道路と同じ舗装材料と同じ材料(
コンクリート等)で充填されたものが用いられ、円形ま
たは長方形をなし取り外し用の錠穴が設けられている。To explain the embodiment of the present invention according to the drawings, Fig. 1 is a top view of a manhole cover, and the frame and bottom plate are usually made of cast iron or iron, the same paving material as the road.
They are filled with concrete, etc.), are circular or rectangular, and have a lock hole for removal.
この蓋1の中央部にマンホールの大きさにより異なるが
直径5〜15cmの排気弁2が嵌合するくぼみ8を設け
る。A recess 8 is provided in the center of the lid 1 into which an exhaust valve 2 having a diameter of 5 to 15 cm is fitted, although it varies depending on the size of the manhole.
このくぼみ8は第2図の断面図に示す如く漏斗状をなし
、中央部に排気弁2の下面に設けたボルト3が挿入され
る取付孔6およびその周囲に排気孔5が複数個穿設され
ている。This recess 8 has a funnel shape as shown in the cross-sectional view of Fig. 2, and has a mounting hole 6 in the center into which the bolt 3 provided on the lower surface of the exhaust valve 2 is inserted, and a plurality of exhaust holes 5 around the mounting hole 6. has been done.
排気弁2は、上面が蓋1の上面と平面をなし、かつ排気
により一時的に持ち上げられたのちもくぼみ8よりずれ
ることなく再び嵌合するようにテーパー状をなし、くぼ
み8の外周と一致するように構成される。The exhaust valve 2 has an upper surface that is flush with the upper surface of the lid 1, and has a tapered shape so that it fits again without slipping from the recess 8 even after being temporarily lifted by the exhaust gas, and matches the outer periphery of the recess 8. configured to do so.
また、排気弁2はボルト3により蓋1より脱落しないよ
うに取付けられるが、取付孔6の直径はボルト3の直径
より大きく排気弁2が容易に上下に可動するような大き
さとし、蓋1の下面とボルト3に取りつけられたナツト
4との間には、内圧が加わったとき排気弁2が僅か上方
に押し上げられ排気が可能なるように隙間aを設は固定
される。Furthermore, the exhaust valve 2 is attached with bolts 3 so as not to fall off from the lid 1, but the diameter of the mounting hole 6 is larger than the diameter of the bolt 3 and is large enough to allow the exhaust valve 2 to move up and down easily. A gap a is provided and fixed between the lower surface and a nut 4 attached to the bolt 3 so that when internal pressure is applied, the exhaust valve 2 is pushed up slightly to enable exhaust.
従って、ナツト4は脱落しないように図に示す如く2個
取付は所謂ダブルナツトにすれば良く、また、上部のナ
ツトはプラスチック製にするか、プラスチック製のワッ
シャを蓋との間に挿入すると排気時衝撃音が発生するこ
とを防止できる。Therefore, in order to prevent the nuts 4 from falling off, it is best to install two nuts as a so-called double nut as shown in the figure.Also, the upper nut may be made of plastic, or a plastic washer may be inserted between it and the lid to prevent it from falling off during exhaust. It is possible to prevent impact noise from occurring.
また、排気弁2は耐摩性の良いプラスチックで作ること
も可能である。Further, the exhaust valve 2 can also be made of plastic with good wear resistance.
排気弁20重量は大きさ材質により異なるので、内圧が
加わった時容易に排気できかつ歩行時に浮上がり引っか
からないようにナツト4に重りをつける等をして調節す
ると良い。The weight of the exhaust valve 20 varies depending on its size and material, so it is best to adjust it by adding weight to the nut 4 so that it can be easily exhausted when internal pressure is applied and does not float up and get caught when walking.
本考案は上記の如く構成されているので、内圧が加った
時内部の気体は排気孔5を通り、排気弁2を押し上げ排
出される。Since the present invention is constructed as described above, when internal pressure is applied, the internal gas passes through the exhaust hole 5, pushes up the exhaust valve 2, and is discharged.
また、くぼみ8は漏斗状をなしているので排気弁2の下
に入った水は排気孔5や取付孔6のボルト3との隙間を
通って下水に排出される。Further, since the recess 8 is funnel-shaped, water that has entered under the exhaust valve 2 is discharged to the sewer through the gap between the exhaust hole 5 and the bolt 3 of the mounting hole 6.
また、本考案によるマンホールの蓋は、排気弁2と蓋1
本体と別に製作されることになるが、従来、マンホール
の蓋は納入先の市町村或いは水道用、ガス用、電気用等
用途毎にマークを付し製作する必要があり、鋳型に経費
がかかるばかりでなく、予備品の貯蔵に多くの場所を必
要としたが、この排気弁2の上面にマークをつけること
により、蓋1の本体は他の市町村、用途と共用できるの
で大量生産ができ、排気弁2のみ交換すれば良いので貯
蔵する場所も少なくてすみ、かつ内圧の加わる恐れのな
い用途に流用する場合は排気弁と蓋を密着固定すれば良
い等実用上の効果は大なものである。In addition, the manhole cover according to the present invention has an exhaust valve 2 and a cover 1.
Manhole covers are manufactured separately from the main body, but conventionally manhole covers have to be marked and manufactured according to the destination municipality or purpose such as water, gas, electricity, etc., which increases the cost of molding. However, by marking the top of the exhaust valve 2, the main body of the lid 1 can be shared with other municipalities and uses, making it possible to mass-produce the exhaust valve. Since only valve 2 needs to be replaced, there is less storage space required, and if the product is used for purposes where there is no risk of internal pressure being applied, the practical effects are great, such as just fixing the exhaust valve and lid tightly together. .
第1図は実施例の排気弁を取り外したときの上面図、第
2図は実施例の排気弁を取りつけた時の縦断面図である
。
1・・・・・・蓋(本体)、2・・・・・・排気弁、3
・・・・・・ボルト、4゜4′・・・・・・ナツト、5
・・・・・・排気孔、6・・・・・・取付孔、7・・・
・・・錠穴、8・・・・・・くぼみ、a・・・・・・隙
間。FIG. 1 is a top view when the exhaust valve of the embodiment is removed, and FIG. 2 is a longitudinal sectional view when the exhaust valve of the embodiment is installed. 1... Lid (body), 2... Exhaust valve, 3
...Bolt, 4゜4'...Nut, 5
...Exhaust hole, 6...Mounting hole, 7...
...Lock hole, 8...Indentation, a...Gap.
Claims (1)
付孔6を中心にその周囲に複数個の排気孔5を穿設した
漏斗状のくぼみ8を設け、排気弁2は上面にマークを表
示すると共に上面を蓋1の上面と一致するようくぼみ8
に嵌合し、下面に取付けられたボルト3は取付孔6に挿
入され蓋1の下面とナツト4の間に隙間aが生ずるよう
に蓋1に取付けられていることを特徴とするマンホール
の蓋。A funnel-shaped recess 8 with a plurality of exhaust holes 5 bored around the mounting hole 6 of the exhaust valve 2, which also serves as a mark display board, is provided in the center of the top surface of the lid 1, and the exhaust valve 2 is provided on the top surface. Make a recess 8 so that the mark is displayed and the top surface matches the top surface of the lid 1.
A manhole cover is fitted to the cover 1, and the bolt 3 attached to the lower surface is inserted into the mounting hole 6 and is attached to the cover 1 such that a gap a is created between the lower surface of the cover 1 and the nut 4. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2767680U JPS5934617Y2 (en) | 1980-03-05 | 1980-03-05 | manhole cover |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2767680U JPS5934617Y2 (en) | 1980-03-05 | 1980-03-05 | manhole cover |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56130049U JPS56130049U (en) | 1981-10-02 |
JPS5934617Y2 true JPS5934617Y2 (en) | 1984-09-25 |
Family
ID=29623626
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2767680U Expired JPS5934617Y2 (en) | 1980-03-05 | 1980-03-05 | manhole cover |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5934617Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5337007B2 (en) * | 2009-11-30 | 2013-11-06 | アロン化成株式会社 | Manhole cover |
JP6780980B2 (en) * | 2016-08-10 | 2020-11-04 | アロン化成株式会社 | Drainage lid |
-
1980
- 1980-03-05 JP JP2767680U patent/JPS5934617Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS56130049U (en) | 1981-10-02 |
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