JPH0589537U - PVC small diameter manhole - Google Patents
PVC small diameter manholeInfo
- Publication number
- JPH0589537U JPH0589537U JP3665292U JP3665292U JPH0589537U JP H0589537 U JPH0589537 U JP H0589537U JP 3665292 U JP3665292 U JP 3665292U JP 3665292 U JP3665292 U JP 3665292U JP H0589537 U JPH0589537 U JP H0589537U
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- Prior art keywords
- manhole
- small
- diameter
- pvc
- lid
- 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.)
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Abstract
(57)【要約】
【目的】 塩ビ製小口径マンホ−ルを提供して施工精度
を上げる。
【構成】 公道に布設された塩ビ製下水本管１に、塩ビ
製小口径マンホ−ル２を接続するに際し、この小口径マ
ンホ−ル２を、本体に３００〜４５０mmφの点検筒８を
立てて構成し、この点検筒８の近傍で、マンホ−ル本体
３上に上面フラットの台座１１を設け、この台座１１に
測定棒１２を立てて、小口径マンホ−ル２の埋設深さを
測るようにしたもの。したがって、従来のいわゆるばか
棒を使うことなく、深さ測定が正確にでき、下水管きょ
施設の施工精度を上げることができる。
(57) [Summary] [Purpose] To provide a small-diameter PVC manhole to improve construction accuracy. [Configuration] to PVC sewer mains 1 which is laid in the road, PVC small caliber sailing - upon connecting Le 2, the small caliber sailing - Le 2, the inspection tube 8 of 300 to 450 mm phi in the body In the vicinity of the inspection tube 8, a pedestal 11 having a flat upper surface is provided on the main body 3 of the manhole, and a measuring rod 12 is erected on the pedestal 11 so that the burial depth of the small-diameter manhole 2 is increased. What I measured. Therefore, the depth can be accurately measured without using the conventional so-called foolish rod, and the construction accuracy of the sewer pipe facility can be improved.
Description
【０００１】[0001]
本考案は、塩ビ製小口径マンホ−ルに関し、詳しくは、小口径マンホ−ルの深 さ測定棒用基準台座に関するものである。 The present invention relates to a small-diameter manhole made of PVC, and more particularly to a reference pedestal for a depth measuring rod of a small-diameter manhole.
【０００２】[0002]
周知のごとくマンホ−ルや会所ますは、排水管の合流点、屈曲管、勾配変化点 、あるいは管径の変化点などに設置され、管きょの点検および掃除を行うように している。 As is well known, manholes and halls are installed at the confluence of drainage pipes, bent pipes, slope change points, or pipe diameter change points so that pipes can be inspected and cleaned.
【０００３】 ところで、昨今、下水道の普及に伴い下水本管（下水管きょ施設における管き ょであって、原則として公道下に埋設されるもの）の埋設が集落排水や狭小道路 にも及ぶようになり、従来のコンクリ−ト製マンホ−ルでは大きすぎて設置スペ −スに難点があり、狭小な場所での施工に手間がかかると共に、工事が難しくな るなどの問題が生じてきた。また、宅地の狭隘化に伴い従来の大型の会所ますを 設置する場所がなくなり、しかも、コンクリ−ト製の会所ますを施工する専門技 術者が不足し、そのため、下水本管と接続した宅地内配管に各種の管継手に掃除 口管を立上がらせた、いわゆる小口径ますが使用されるようになってきた（例え ば、実公平２−４５３５０号公報、実公平３−２９６７２号公報等参照）。By the way, recently, with the spread of sewerage, sewage mains (pipes in sewage pipe facilities, which are basically buried under public roads) are also buried in village drainage and narrow roads. As a result, conventional concrete manholes are too large and have difficulty in installation space.Construction in a narrow space is troublesome and construction is difficult. .. In addition, due to the narrowing of residential land, there is no longer a place to install a conventional large-scaled hall, and there is a shortage of specialists to construct concrete halls.Therefore, the residential land connected to the sewer main A so-called small diameter masu, in which cleaning pipes are set up in various pipe joints in the inner pipe, has come to be used (for example, Japanese Utility Model No. 2-45350, Japanese Utility Model No. 3-29672, etc.) reference).
【０００４】 かかる塩ビ製の小口径ますは、従来のコンクリ−ト製ますに比べ、１）浸入水 を防止できる、２）小口径ますと塩ビパイプとの接続が良好になる、３）宅地内 スペ−スをとらず、美観を損なわない、４）コストを下げる、５）工事が早い、 等の効果を発揮する。Compared with conventional concrete-made masu, such a small-diameter masu made of vinyl chloride is 1) capable of preventing intrusion of water, 2) a small-diameter masu has a better connection with a PVC pipe, and 3) in residential land It does not take up space, does not impair aesthetics, 4) reduces costs, 5) works quickly, and so on.
【０００５】 したがって、かかる効果と、最近の住宅における数多くの排水設備器具（例え ば、水洗トイレ、洗濯機等）とが相俟って、多数の小口径ますが宅地内で設置さ れるようになった。Therefore, this effect is combined with a large number of drainage equipments (for example, flush toilets, washing machines, etc.) in recent homes, so that a large number of small calibers can be installed in a residential area. became.
【０００６】 一方、公道に埋設された下水管きょ施設には、公道を車輛等の重量物が通るこ とから、ある程度以上の埋設深さと強度とを必要としている。例えば、下水本管 に設けられるコンクリ−ト製のマンホ−ルの蓋は、車道では鋳鉄製が原則となっ ている。他方、下水本管を塩ビパイプが採用されてから、前記のようにコンクリ −ト製マンホ−ルとの接続に難点が生じ、公道においても、塩ビ製の小口径マン ホ−ル（前記の小口径ますより掃除口管が大径になったもの、以下同じ）の出現 が要望されている。On the other hand, a sewer pipe facility buried in a public road requires a certain level of burial depth and strength because heavy objects such as vehicles pass through the public road. For example, the cover of the concrete manhole installed in the main sewer is made of cast iron in principle on the roadway. On the other hand, since the PVC pipe was adopted as the main sewer pipe, there was a problem in connection with the concrete manhole as described above, and even on public roads, the PVC small manhole (the small It is desired that a cleaning pipe with a larger diameter than that of the caliber, the same shall apply hereinafter) appears.
【０００７】 かかる小口径マンホ−ルは、下水本管の勾配が埋設場所によって異なること、 および、埋設深さが大となることから、従来の小口径ますに比べ、マンホ−ル本 体に立設する掃除口管は鉛直方向でなければならない新しい条件が加わり、しか も、宅地内で用いられる小口径ますと違い、公共の下水管きょ施設に用いられる ので、次のような条件が加わっている。[0007] Such a small-diameter manhole stands on the main body of the manhole as compared with the conventional small-diameter man, because the slope of the sewer main differs depending on the burial site and the burial depth becomes large. A new condition is added that the cleaning pipe to be installed must be in the vertical direction.However, unlike the small caliber used in residential land, it is used for public sewer pipe facilities, so the following conditions are added. ing.
【０００８】 すなわち、下水道管きょは半永久的に使われ、原則として公道下に深く埋設さ れるものであるから、使用する材料の品質は厳しくチエックされるのは勿論、下 水道本管は自然流下方式であるため、厳しい施工精度が要求されている。そのた め、下水道工事の検査も一段と厳しく、例えば、施工段階毎の検査や出来形管理 と呼ばれる数値管理や写真撮影管理が行われている。例えば、この数値管理では 、マンホ−ル間の距離の実測、マンホ−ルの深さの実測、下水本管の勾配等の検 査が行われ、その結果を、測定結果一覧表で表示される。That is, since the sewer pipe is used semi-permanently and is deeply buried under the public road in principle, the quality of the materials used is strictly checked, and the sewer main is naturally Since it is a flow-down system, strict construction accuracy is required. For this reason, the inspection of sewer construction is more rigorous. For example, inspections at each construction stage and numerical control called photo control and photo control are performed. For example, in this numerical management, the distance between manholes is measured, the depth of manhole is measured, the slope of the sewer main is checked, and the results are displayed in a measurement result list. .
【０００９】 したがって、塩ビ製の小口径マンホ−ルも、これらの厳しい品質、施工精度お よび検査に対応しなければならない、という条件が加わっている。Therefore, the small-diameter manhole made of vinyl chloride is also subject to the strict quality, construction accuracy, and inspection.
【００１０】 他方、公道に布設する小口径マンホ−ルでは、従来の小口径ますに比べ、１） 設計標準で埋設深さ等が定められており、そのため、埋設深さを正確にする必要 がある、２）公道がコンクリ−トまたはアスファルトになるので、マンホ−ル蓋 と地表とを正確に一致させる必要があり、３）小口径マンホ−ル本体の埋設深さ １m 以上の深さになり、４）マンホ−ル蓋は塩ビ製の蓋のみでは強度不足となり 、しかも、掃除口管やマンホ−ル本体に荷重がかからないように、掃除口管の蓋 を内蓋とし、これを更にカバ−した保護鉄蓋を用いる必要があって、内蓋と保護 鉄蓋との空間を介在する必要がある、という事情がある。On the other hand, in small-diameter manholes laid on public roads, compared to the conventional small-diameter masquerading, 1) the burial depth etc. is determined by the design standard, so it is necessary to make the burial depth accurate. Yes, 2) Since public roads will be concrete or asphalt, it is necessary to exactly match the manhole cover with the ground surface. 3) The burial depth of the small-diameter manhole body is 1 m or more. 4) As for the manhole cover, the strength is insufficient with a vinyl chloride cover alone. Moreover, the cover of the cleaning port pipe is used as an inner cover so that the load is not applied to the cleaning port pipe and the main body of the manhole. -It is necessary to use a protective iron lid, and it is necessary to intervene the space between the inner lid and the protective iron lid.
【００１１】 したがって、小口径マンホ−ルにおける掃除口管の切管に際しては、これらの 事情により、従来の小口径ますの掃除口管の切管より手間がかかる、という問題 があった。その上、小口径マンホ−ル本体より地表迄の深さを測る際、マンホ− ル本体では、いずれの箇所も下向きに丸みをおびていて、かつ樹脂製であるため 深さ測定棒を載せると滑りやすく、しかも、マンホ−ル本体のいずれの箇所が基 準となるか不明瞭であって、正確な値が得られず、ひいては掃除口管の切管に誤 りのおそれがあった。Therefore, due to these circumstances, there is a problem that it takes more time to cut the cleaning pipe in the small-diameter manhole than the cutting pipe of the conventional cleaning pipe of the small-diameter masque. In addition, when measuring the depth from the small-diameter manhole body to the surface of the earth, if you place a depth measuring rod on the manhole body, it is rounded downward at all points and is made of resin. It was slippery, and it was unclear which part of the manhole body was the reference, so an accurate value could not be obtained, and there was a risk of mistaken cut tubes in the cleaning mouth tube.
【００１２】 また一方、一般のコンクリ−ト製マンホ−ルにおける埋設深さは、一般的には 、いわゆるばか棒と呼ばれる深さ測定棒が用いられており、これは目盛付の長寸 棒と短寸棒（脚部）とをＬ字状に組合せて、この短寸棒下に当接ピンを下向きに 設けており、このばか棒をコンクリ−ト製マンホ−ルの上方開口部より挿入した 後、当接ピンを下流側管底に当接させて、長寸棒の目盛を読む、という手法がと られている。したがって、長寸棒を鉛直方向にすることが困難で、ゆみと呼ばれ る支持部材を用いて、鉛直を保持する、という面倒な問題があった。On the other hand, as for the burial depth in a general concrete manhole, a depth measuring rod called a so-called stupid rod is generally used, which is a long rod with a scale. A short bar (leg) is combined in an L-shape, and a contact pin is provided downward under the short bar. This foolish bar was inserted through the upper opening of the concrete manhole. After that, the contact pin is brought into contact with the bottom of the downstream pipe to read the scale of the long rod. Therefore, it is difficult to make the long rod in the vertical direction, and there is a troublesome problem that the vertical member is held by using a supporting member called Yumi.
【００１３】[0013]
そこで本考案は、かかる諸問題を解決するために案出されたもので、その要旨 とするところは、道路に埋設された塩ビ製下水本管に、塩ビ製小口径マンホ−ル を設け、該小口径マンホ−ル本体に、上端に内蓋を取付けた掃除口管を立設する 受口または差口を設け、該内蓋を、本体と蓋からなる保護鉄蓋で、空間を介して 、カバ−し、該保護鉄蓋の蓋を地表と一致させると共に、保護鉄蓋を、前記掃除 口管に遊嵌した沈下防止板により支持した小口径マンホ−ルにあって、前記マン ホ−ル本体の受口または差口の外周近傍に、上面がフラット状の、深さ測定棒用 基準台座を設けたことを特徴とする塩ビ製小口径マンホ−ルにある。 Therefore, the present invention was devised to solve these problems, and the gist of the present invention is to install a small-diameter PVC manhole on a PVC sewer main buried in a road. A small-diameter manhole main body is provided with a receiving port or a spout for vertically installing a cleaning port pipe with an inner lid attached to the upper end, and the inner lid is a protective iron lid consisting of the main body and the lid, and is provided through a space. In the small-diameter manhole in which the cover of the protective iron cover is aligned with the surface of the earth and the protective iron cover is supported by the sinking prevention plate loosely fitted in the cleaning port pipe, the manhole is This is a small-diameter PVC manhole characterized in that a reference base for a depth measuring rod having a flat upper surface is provided in the vicinity of the outer circumference of the receiving port or the spigot of the main body.
【００１４】[0014]
本考案の構成を添付図面に示す第１および第２の実施例により詳細に述べる。 The structure of the present invention will be described in detail with reference to the first and second embodiments shown in the accompanying drawings.
【００１５】 図１は本考案の第１の実施例の部分破断分解斜視図、図２は第２の実施例の部 分破断分解図、図３は図２の使用状態図である。FIG. 1 is a partially broken exploded perspective view of the first embodiment of the present invention, FIG. 2 is a partially broken exploded view of the second embodiment, and FIG. 3 is a usage state diagram of FIG.
【００１６】 先ず、第１の実施例により本考案の骨子を述べる。図１は、後述の保護鉄蓋１ ７を省略した図示であるが、１は、公道に約１m 以上の深さで埋設される塩ビ製 下水本管であって、この下水本管１に塩ビ製の小口径マンホ−ル２が設けられて いる。この小口径マンホ−ル２は、インバ−ト部が９０°大曲りＹ管継手で構成 され、その本体３には、上向きにＴＳ受口からなる掃除口用受口４を設け、流入 ・流出側にＴＳ受口からなる下水本管用受口５，６を設け、更に、合流側本管若 しくは宅地内配管（不図示）と接続するＴＳ受口からなる合流側受口７を設けて いる。この掃除口用受口４は、下水本管１が１５０mmφの場合、３００mmφの大 きさになっているが、大略３００mm〜４５０mmφの大きさにして下水本管１の点 検・掃除に支障のないようにしている。First, the essence of the present invention will be described with reference to the first embodiment. FIG. 1 is an illustration in which a protective iron cover 17 described later is omitted, but reference numeral 1 denotes a PVC sewer main that is buried in a public road at a depth of about 1 m or more. A small-diameter manhole 2 made of PVC is provided. The small-diameter manhole 2 has a 90 ° large-bend Y pipe joint in the invert portion, and the main body 3 thereof is provided with a cleaning port receiving port 4 formed of a TS port upward, and inflow / outflow. The sewage main inlets 5 and 6 consisting of TS inlets are provided on the side, and the merging side inlet 7 which is connected to the merging side mains or the residential land pipe (not shown) is provided. There is. The cleaning port for socket 4, when sewage mains 1 is 150 mm φ, 300 mm φ has become of great trees, but the sewer main pipe 1 in the magnitude of approximately 300 mm to 450 mm phi We do not hinder inspection and cleaning.
【００１７】 この掃除口用受口４には掃除口管８が接合され、掃除口管８の上端には塩ビ（ または鋳鉄）製の密閉式内蓋９が取付けられている。A cleaning port tube 8 is joined to the cleaning port receptacle 4, and a closed inner lid 9 made of PVC (or cast iron) is attached to the upper end of the cleaning port tube 8.
【００１８】 以上の構造そのものは、従来の小口径ますと同じであるが、掃除口用受口４の ＴＳ受口のストッパ−１０と同じ高さにおいて、掃除口用受口４の外周に上面が フラット状になった深さ測定棒用基準台座１１を形成している。この基準台座１ １に深さ測定棒１２の脚部１２ａを載せ、小口径マンホ−ル２の埋設深さを測り 、後述のやり方によって、掃除口管８の切管をするようにしている。したがって 、この基準台座１１は上面がフラットになっているので、深さ測定棒１２をこれ に載せても滑ることはなく、常に一定で、かつ、正確な埋設深さを測ることがで きる。The above-mentioned structure itself is the same as the conventional small-diameter, but at the same height as the stopper 10 of the TS receptacle of the cleaning receptacle 4, the upper surface is formed on the outer periphery of the cleaning receptacle 4. Forming a flat pedestal 11 for the depth measuring rod. The leg portion 12a of the depth measuring rod 12 is placed on the reference pedestal 11, the buried depth of the small-diameter manhole 2 is measured, and the cleaning port pipe 8 is cut by a method described later. Therefore, since the upper surface of the reference pedestal 11 is flat, even if the depth measuring rod 12 is placed on the reference pedestal 11, it does not slip, and the burial depth can be constantly and accurately measured.
【００１９】 なお、基準台座１１は複数設けてあってもよく、その背部には肉ヌスミ１３を 設けている。It should be noted that a plurality of reference pedestals 11 may be provided, and a meat slime 13 is provided on the back thereof.
【００２０】 次に、かかる深さ測定棒用基準台座１１をもつ第２の実施例を述べる。図２お よび図３において、小口径マンホ−ル２のマンホ−ル本体３には、上向きに掃除 口用差口１４を設け、流入・流出側に上流側下水本管用ゴム輪受口５、下流側下 水本管用差口６を設け、横向きに不図示の合流側受口を設けている。そして、こ のマンホ−ル本体３の掃除口用差口１４の外周には、深さ測定棒用基準台座１１ を形成している。Next, a second embodiment having such a depth measuring rod reference pedestal 11 will be described. 2 and 3, the manhole main body 3 of the small-diameter manhole 2 is provided with a cleaning port inlet 14 facing upward, and an upstream side sewer main rubber ring receiving port 5 is provided on the inflow / outflow side. A downstream side sewer main 6 is provided, and a merge side receiving port (not shown) is provided sideways. A reference pedestal 11 for the depth measuring rod is formed on the outer periphery of the cleaning port 14 of the manhole main body 3.
【００２１】 前記掃除口用差口１４には、ゴム輪受口１５を下端側にもつ掃除口管１６が鉛 直方向に接合し、この掃除口管１６の上端には密閉式内蓋９が取付けられている 。A cleaning port pipe 16 having a rubber ring receiving port 15 at the lower end side is vertically joined to the cleaning port inlet 14, and a closed inner lid 9 is provided at the upper end of the cleaning port pipe 16. Installed.
【００２２】 この内蓋９には、これを更にカバ−した保護鉄蓋１７が設けてある。この保護 鉄蓋１７は、図２では、下方に拡径された円錐体からなる本体１８と、この本体 １８の上面に開閉自在に設けられた鉄蓋１９とから構成されている。また、図３ では円筒体９からなる本体１８と、この円筒体１９の上面に開閉自在に設けられ た鉄蓋１９とから構成されている。この本体１８の下端にはフランジ２０を設け 、このフランジ２０がド−ナツ状の沈下防止板２１に載置され、保護鉄蓋１７を 支持している。The inner lid 9 is provided with a protective iron lid 17 that covers the inner lid 9. In FIG. 2, the protective iron lid 17 is composed of a main body 18 made of a conical body whose diameter is expanded downward, and an iron lid 19 provided on the upper surface of the main body 18 so as to be openable and closable. Further, in FIG. 3, it is composed of a main body 18 composed of a cylindrical body 9 and an iron lid 19 provided on the upper surface of the cylindrical body 19 so as to be openable and closable. A flange 20 is provided at the lower end of the main body 18, and the flange 20 is placed on a doughnut-shaped sinking prevention plate 21 to support the protective iron lid 17.
【００２３】 次に、第２の実施例の作用を述べる。公道を掘削した溝に小口径マンホ−ル２ を設置する。そのとき、下水本管１や合流側本管の芯出しと共に、マンホ−ル本 体３の勾配を整えて仮設置する。次いで、深さ測定棒１２によって、地表ＧＬか ら基準台座１１迄の深さＨを測る。一方、使用する保護鉄蓋１７および沈下防止 板２１において、図３におけるｈ1 およびマンホ−ル本体３の下流側管底から基 準台座１１迄の高さが予め判明しており、しかも、内蓋９の肉厚ｄも判明してい るので、このｈ1 に相当する空間高さｈ2 （１０〜１５mm）を選定する。したが って、深さＨからこのｈ2 を引いた長さで掃除口管１６の上端側を切管する。次 いで、所定の長さに切管された掃除口管１６を掃除口用差口１４に接続した後、 この掃除口管１６の周辺を充分に突き固めてから、ｈ1 の所に沈下防止板２１を 設置する。その後、沈下防止板２１の上に保護鉄蓋１７を載置してから、更に周 辺を充分に突き固めて埋め戻しをする。その後、アスファルト２２を舗装する。 このようにして、設計標準（設計図書）に定められた埋設深さが得られる。なお 、本考案の保護鉄蓋は、円錐状を含めて円筒状と称している。Next, the operation of the second embodiment will be described. A small-diameter manhole 2 will be installed in the trench where the public road was excavated. At that time, along with the centering of the sewage main pipe 1 and the main pipe on the confluence side, the slope of the manhole main body 3 is adjusted and temporarily installed. Then, the depth H from the ground surface GL to the reference pedestal 11 is measured by the depth measuring rod 12. On the other hand, in the protective iron lid 17 and the subsidence prevention plate 21 used, h 1 in FIG. 3 and the height from the downstream pipe bottom of the manhole main body 3 to the reference pedestal 11 are known in advance, and Since the wall thickness d of the lid 9 is also known, the space height h 2 (10 to 15 mm ) corresponding to this h 1 is selected. Therefore, the upper end side of the cleaning port pipe 16 is cut with a length obtained by subtracting this h 2 from the depth H. Next, after connecting the cleaning port pipe 16 cut to a predetermined length to the cleaning port spigot 14 and sufficiently compacting the periphery of the cleaning port pipe 16, settling at h 1 is prevented. Install the plate 21. After that, the protective iron lid 17 is placed on the subsidence prevention plate 21, and then the periphery is further sufficiently tamped to backfill. Then, the asphalt 22 is paved. In this way, the burial depth determined by the design standard (design document) can be obtained. The protective iron lid of the present invention is called a cylindrical shape including a conical shape.
【００２４】 なお、本実施例の小口径マンホ−ルは、９０°大曲りＹの管継手状のインバ− トとしているが、本考案はこれに限らず、他のタイプ例えば、ストレ−ト、エル ボ、４５ＹＴ等であってもよい。また、掃除口管用受口はＴＳ受口であってもゴ ム輪受口であってもよい。The small-diameter manhole of this embodiment is a 90 ° large-bend Y pipe joint-shaped invert, but the present invention is not limited to this, and other types, such as a straight, It may be an elbow, 45YT or the like. Further, the cleaning mouth tube receptacle may be a TS receptacle or a rubber wheel receptacle.
【００２５】[0025]
本考案によれば、公道に埋設される塩ビ製小口径マンホ−ルに、深さ測定棒用 基準台座を設けたので、深さ測定棒をマンホ−ルの中に挿入することなく、測定 作業が簡便に行え、埋設深さが常に一定に測られ、しかも、滑ることなく正確に 測られる。ひいては、設計標準通りの埋設深さが正確に得られ、施工精度が向上 する。 According to the present invention, the small-diameter PVC manhole embedded in a public road is provided with the depth measuring rod reference pedestal. The burial depth can be measured constantly, and it can be measured accurately without slipping. As a result, the burial depth according to the design standard can be obtained accurately, improving the construction accuracy.
【００２６】 その結果、掃除口管の正確な切管ができ、内蓋と保護鉄蓋との空間が適切とな って、車輛等重量がかかったり、地盤沈下があっても塩ビ製のマンホ−ル本体や 掃除口管を損傷しない。As a result, an accurate cut tube of the cleaning port tube can be formed, the space between the inner lid and the protective iron lid is appropriate, and the weight of the vehicle or the like, or even if there is ground subsidence -Do not damage the main body and the cleaning pipe.
【図１】本考案の第１の実施例の部分破断分解斜視図で
ある。FIG. 1 is a partially cutaway exploded perspective view of a first embodiment of the present invention.
【図２】第２の実施例の部分破断分解図である。FIG. 2 is a partially cutaway exploded view of the second embodiment.
【図３】図２の使用状態図である。FIG. 3 is a use state diagram of FIG.
１…下水本管、２…小口径マンホ−ル、３…本体、４…
掃除口用受口、８，１６…掃除口管、９…内蓋、１１…
深さ測定棒用基準台座、１４…掃除口用差口、１７…保
護鉄蓋、２１…沈下防止板1 ... sewage main pipe, 2 ... small diameter manhole, 3 ... main body, 4 ...
Cleaning port receptacle, 8, 16 ... Cleaning port tube, 9 ... Inner lid, 11 ...
Depth measuring rod reference pedestal, 14 ... Cleaning port spigot, 17 ... Protective iron lid, 21 ... Sinking prevention plate
Claims (1)
ビ製小口径マンホ−ルを設け、該小口径マンホ−ル本体
に、上端に内蓋を取付けた掃除口管を立設する受口また
は差口を設け、該内蓋を、本体と蓋からなる保護鉄蓋
で、空間を介して、カバ−し、該保護鉄蓋の蓋を地表と
一致させると共に、保護鉄蓋を、前記掃除口管に遊嵌し
た沈下防止板により支持した小口径マンホ−ルにあっ
て、 前記マンホ−ル本体の受口または差口の外周近傍に、上
面がフラット状の、深さ測定棒用基準台座を設けたこと
を特徴とする塩ビ製小口径マンホ−ル。1. A PVC sewage main line buried in a road is provided with a PVC small-diameter manhole, and a small-diameter manhole main body is provided with a cleaning port pipe with an inner lid attached to the upper end thereof. A receptacle or a spigot is provided, and the inner lid is covered with a protective iron lid composed of a main body and a lid through a space so that the lid of the protective iron lid is aligned with the ground surface, and the protective iron lid is In a small-diameter manhole supported by a sinking prevention plate loosely fitted to the cleaning port pipe, for a depth-measuring bar having a flat upper surface in the vicinity of the outer periphery of the receiving port or the opening of the manhole body. A small-diameter PVC manhole characterized by having a standard pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3665292U JP2524756Y2 (en) | 1992-05-02 | 1992-05-02 | PVC small diameter manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3665292U JP2524756Y2 (en) | 1992-05-02 | 1992-05-02 | PVC small diameter manhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0589537U true JPH0589537U (en) | 1993-12-07 |
| JP2524756Y2 JP2524756Y2 (en) | 1997-02-05 |
Family
ID=12475792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3665292U Expired - Lifetime JP2524756Y2 (en) | 1992-05-02 | 1992-05-02 | PVC small diameter manhole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2524756Y2 (en) |
-
1992
- 1992-05-02 JP JP3665292U patent/JP2524756Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2524756Y2 (en) | 1997-02-05 |
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