JPH09237U - PVC small diameter manhole - Google Patents
PVC small diameter manholeInfo
- Publication number
- JPH09237U JPH09237U JP1084496U JP1084496U JPH09237U JP H09237 U JPH09237 U JP H09237U JP 1084496 U JP1084496 U JP 1084496U JP 1084496 U JP1084496 U JP 1084496U JP H09237 U JPH09237 U JP H09237U
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- Prior art keywords
- inspection
- manhole
- diameter
- small
- lid
- Prior art date
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Abstract
(57)【要約】
【課題】 公道に埋設する塩ビ製小口径マンホ−ルの点
検筒に鉛直性をもたせ、完了点検に合格させる。
【解決手段】 塩ビ製下水本管に接続する塩ビ製小口径
マンホ−ルの本体１に、点検筒６を立てる。この点検筒
６の上端に内蓋８を被せ、この内蓋８を、沈下防止板１
３で支持した保護鉄蓋１１でカバ−するが、この本体１
と点検筒６との間に、規格化されている取付け管適用型
のゴム輪受口２０を介在させると、点検筒６の鉛直性を
出す微調整が好都合にでき、保護鉄蓋１１の装着に支障
を与えない。したがって、マンホ−ルの完了点検に合格
させることができる。
(57) [Abstract] [Problem] To make a small cylinder manhole made of vinyl chloride buried in a public road have an inspection tube with verticality and pass a completion inspection. SOLUTION: An inspection tube 6 is erected on a main body 1 of a vinyl chloride small-diameter manhole connected to a PVC sewer main pipe. An upper lid of the inspection cylinder 6 is covered with an inner lid 8, and the inner lid 8 is attached to the subsidence prevention plate 1.
It is covered with the protective iron lid 11 supported by 3, but this main body 1
If a standardized mounting tube-applied rubber ring receiving port 20 is interposed between the inspection tube 6 and the inspection tube 6, fine adjustment to bring out the verticality of the inspection tube 6 can be conveniently performed, and the protective iron lid 11 is attached. Does not interfere with Therefore, the completion inspection of the manhole can be passed.
Description
【０００１】[0001]
本考案は、鉛直性を保持する点検筒をもつ塩ビ製小口径マンホ−ルに関するも のである。 The present invention relates to a PVC small-diameter manhole having a vertical inspection tube.
【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 confluence points of drainage pipes, bent pipes, slope change points, and pipe diameter change points, and are designed to inspect and clean pipe outlets.
【０００３】 ところで、昨今、マンホ−ルに関しては、下水道の普及に伴い下水本管（下水 管きょ施設の管であって、原則として公道に埋設されるもの）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（代表的には 、人が出入り可能のもの）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、大型マンホ−ルのための掘削や矢板打ち等の施工に手間がかかると共に 、工事が難しくなる等の問題が生じてきた。By the way, in recent years, with regard to manholes, with the spread of sewerage, sewage mains (pipes of sewerage pipe facilities, which are basically buried on public roads) are buried in village drainage and narrow roads. However, conventional concrete manholes (typically those that allow people to enter and leave) are too large to be installed in space, and are difficult to install in small spaces. Problems such as excavation for manholes and construction of sheet piles have been troublesome, and construction has become difficult.
【０００４】 一方、会所ますに関しては、宅地の狭小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−ト製のますを築造する専門技術者が不 足し、そのため、掃除口管を立上がらせた、塩ビ製の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３−２ ９６７２号公報等参照）。On the other hand, with regard to the halls, the space for installing large conventional halls has disappeared due to the narrowing of the residential area, and moreover, the specialists for building concrete trouts have been lacking, so cleaning So-called small-diameter masu made of PVC with a raised mouth tube has come into use (see, for example, Japanese Utility Model Publication No. 2-45350 and Japanese Utility Model Publication No. 3-29672).
【０００５】 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できる。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。Such a small caliber made of PVC can 1) prevent ingress of water as compared with the conventional concrete masque. 2) A small diameter allows good connection with a PVC pipe. 3) Housing space Does not take space and does not spoil aesthetics. 4) Lower costs. 5) The effect is that construction is quick.
【０００６】 したがって、かかる効果と、最近の住宅における排水設備器具（例えば、水洗 トイレ、洗濯機等）の増加とが相俟って、多数の小口径ますが設置されるように なった。[0006] Therefore, in combination with such an effect and the recent increase in the number of drainage equipments (for example, flush toilets, washing machines, etc.) in houses, a large number of small calibers have been installed.
【０００７】 そこで、前記のようにコンクリ−ト製マンホ−ルに関する問題点の発生と共に 、下水本管に塩ビパイプが採用されたので、コンクリ−ト製マンホ−ルとの接続 に難点が発生したことにより、公道においても、塩ビ製の小口径マンホ−ル（大 雑把にいえば、前記の小口径ますより掃除口管がスケ−ルアップしたもの）の出 現が要望されている。[0007] Therefore, as described above, along with the occurrence of the problems regarding the concrete-made manhole, a PVC pipe was adopted for the main sewer pipe, which caused a difficulty in connection with the concrete-made manhole. Therefore, on public roads as well, there is a demand for the appearance of a small-diameter manhole made of PVC (generally speaking, a cleaning-up pipe is scaled up rather than the small-diameter masu described above).
【０００８】 しかしながら、かかる小口径マンホ−ルは、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る。However, unlike such a small-diameter manhole used in a residential area, such a small-diameter manhole is used in a public sewer pipe facility, so the following conditions are added.
【０００９】 すなわち、一般に、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 高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−ルの高さの実測、マンホ−ルの深さの実測、内径、壁厚の実測 および下水本管の勾配等の検査が行われ、その結果を、測定結果一覧表に設計値 と並べて記入し、保存している。That is, since the sewer pipe is generally used semipermanently and is deeply buried under the public road in principle, the quality of the material to be used is strictly checked, and the sewer main is of course checked. Is a free-flowing type, so strict construction accuracy is required. For this reason, the inspection of sewer construction is even more rigorous. For example, inspections at each construction stage and numerical control called photo output control and photography control are performed. For example, in this numerical management, the height of the manhole is measured, the depth of the manhole is measured, the inner diameter and wall thickness are measured, and the slope of the sewer main is inspected. The results are listed alongside the design values and saved.
【００１０】 したがって、塩ビ製の小口径マンホ−ルを採用しても、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、という条件が加わる。Therefore, even if a small-diameter manhole made of vinyl chloride is adopted, there is an additional condition that these severe quality, construction accuracy and inspection must be dealt with.
【００１１】 ところで、一般のコンクリ−ト製マンホ−ルでは、マンホ−ルの深さ、形状寸 法、インバ−トの状態、および、マンホ−ル蓋または口環と路面とのすり合せ状 態、更には、蓋の納まり具合等は、完了点検事項として、厳しくチエックされる が、従来のマンホ−ルはコンクリ−ト製で、工事現場に合せて築造されるので、 これらの点検事項はその都度対応されていた。By the way, in a general concrete manhole, the depth and shape of the manhole, the state of the invert, and the state of the manhole cover or mouth ring and the road surface are fitted. In addition, although the lid's fitting condition is strictly checked as a completion inspection item, since the conventional manhole is made of concrete and built according to the construction site, these inspection items are It was dealt with each time.
【００１２】[0012]
しかしながら、塩ビ製の小口径マンホ−ルを採用すれば、この塩ビ製マンホ− ルは寸法精度が高く、かつ、量産化された既製品となるため、マンホ−ルの深さ 、形状寸法、インバ−トの状態および下水本管との接続等については、コンクリ −ト製マンホ−ルに比べ、一段と施工精度は向上するものの、掃除口管の鉛直性 については、次のような問題が発生した。すなわち、本来、下水本管の勾配が、 排水量や工事現場の地形や土質、および地下埋設物の有無等によって、また、設 計毎に異なることから、更には、路面に傾斜の有無があることから、鉛直性が得 られにくい、つまり、完了点検に合格し難い、という問題が新しく発生した。 However, if a small-diameter manhole made of PVC is adopted, this PVC manhole has high dimensional accuracy and is a mass-produced ready-made product. -Concerning the condition of the air conditioner and the connection with the main sewer pipe, the construction accuracy is further improved compared to the concrete manhole, but the following problems occurred with respect to the verticality of the cleaning mouth pipe. . In other words, the slope of the sewage main originally differs depending on the amount of drainage, the topography and soil quality of the construction site, the presence or absence of underground buried objects, etc., and also the slope of the road surface. Therefore, there is a new problem that it is difficult to obtain verticality, that is, it is difficult to pass the completion inspection.
【００１３】[0013]
そこで本考案は、かかる問題点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、道路下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、下流側の接続部をそれぞれ設けると共 に、口径３００〜５００mmφで、かつ、上端に内蓋を設けた点検筒を立設する点 検筒用開口部を設け、前記内蓋を、円筒状本体と鉄蓋からなる保護鉄蓋で、空間 を介して、カバ−し、該保護鉄蓋を、前記点検筒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、前記点検筒用開口部（４）と点検筒（６）と の間に、下または上端側にゴム輪を、上または下端側にストッパ−部（１６）を 、該ストッパ−部（１６）の下または上側に拡径部を、それぞれ設けたゴム輪受 口（２０）を介在させることにより、前記点検筒（６）を鉛直状に微調整可能と し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 such problems, and the gist of the present invention is to provide a PVC small-diameter manhole in the PVC main sewer main buried under the road. The small-diameter manhole main body is provided with upper and downstream connecting portions, respectively, and an inspection cylinder having a diameter of 300 to 500 mm φ and an inner lid at the upper end is erected. Part, and the inner lid is covered with a protective iron lid composed of a cylindrical body and an iron lid through a space, and the protective iron lid is supported by a sinking prevention plate loosely fitted in the inspection tube. In the small caliber manhole, a rubber ring is provided on the lower or upper end side and a stopper portion (16) on the upper or lower end between the inspection tube opening (4) and the inspection tube (6). Through a rubber ring receiving port (20) provided with an enlarged diameter portion below or above the stopper portion (16). By, PVC small diameter sailing characterized by being adjusted finely the inspection tube (6) in a vertical form - in LE.
【００１４】[0014]
本考案を、添付図面に示す実施の形態例により詳細に述べる。 図１は本考案の実施例の要部断面図、図２は図１の実施の形態例に適用参考例 である。 The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIG. 2 is a reference example applied to the embodiment of FIG.
【００１５】 この実施の形態例の塩ビ製小口径マンホ−ルは、公道下に約１m 以上の深さで 埋設された、口径１５０mmφの塩ビ製下水本管（不図示）に好適に設けられる。The PVC small-diameter manhole of this embodiment is suitable for a PVC sewer main pipe (not shown) having a diameter of 150 mm and buried under a public road at a depth of about 1 m or more. It is provided.
【００１６】 図１において、１は塩ビ製の小口径マンホ−ル（小口径ますの掃除口管より大 径の掃除口管、すなわち、点検筒６を備えたもので、点検筒６の大きさは、３０ ０〜５００mmφとなっている）本体であって、左右方向に下水本管を接続する接 続部である、上流側ゴム輪受口２と下流側差口３とが設けられ、横向きに９０° 大曲りエルボからなる、合流側本管用受口（不図示）が設けられ、上向きに点検 筒用開口部４が設けられている。In FIG. 1, reference numeral 1 denotes a small-diameter manhole made of PVC (a cleaning mouth pipe having a diameter larger than that of a cleaning mouth of a small-diameter maser, that is, an inspection cylinder 6 is provided. Is a body diameter of 300 to 500 mm ) and is provided with an upstream side rubber ring receiving port 2 and a downstream side inlet 3 which are connection parts for connecting the sewer mains in the left-right direction. A laterally-formed 90 ° large-bend elbow is provided with a merging side main pipe receiving port (not shown), and an inspection tube opening 4 is provided upward.
【００１７】 この点検筒用開口部４には、継手５を介して、点検筒６が接続されている。こ の点検筒６の下端側は差口７に形成され、上端には内蓋８が設けられている（図 ２参照）。An inspection cylinder 6 is connected to the inspection cylinder opening 4 via a joint 5. The lower end side of the inspection cylinder 6 is formed with a spigot 7, and the upper end is provided with an inner lid 8 (see FIG. 2).
【００１８】 この継手５の上端側には、２条の第１および第２のゴム輪嵌合溝１７，１８が 形成されている。第１のゴム輪嵌合溝１７には、シ−ル用のリップ付のゴム輪１ ７ａが嵌合され、第２のゴム輪嵌合溝１８には、内径が点検筒６より若干小径と なったストッパ−用の断面四角状のゴム輪１８ａが嵌合されている。また、下端 側には、通常のゴム輪受口２０が設けられている。このゴム輪受口２０と第２の ゴム輪嵌合溝１８との間に、縮径（約２９８mmφ）されたストッパ−部１６が設 けられている。On the upper end side of the joint 5, two first and second rubber ring fitting grooves 17, 18 are formed. The rubber ring 17a with a lip for sealing is fitted in the first rubber ring fitting groove 17, and the inner diameter of the second rubber ring fitting groove 18 is slightly smaller than that of the inspection tube 6. A rubber ring 18a having a square cross section for the stopper is fitted. Further, a normal rubber ring receiving port 20 is provided on the lower end side. The rubber ring socket 20 between the second rubber ring fitting groove 18, diameter (about 298 mm phi) is the stopper - part 16 is kicked set.
【００１９】 このゴム輪受口２０は、図１に示すように、下端側にゴム輪を、上端側にスト ッパ−部１６を、該ストッパ−部１６の下側に拡径部を、それぞれ設けた、下水 道協会規格で規定された取付け管適用型のゴム輪受口で構成されている。As shown in FIG. 1, the rubber ring receiving port 20 has a rubber ring on the lower end side, a stopper portion 16 on the upper end side, and an enlarged diameter portion on the lower side of the stopper portion 16. Each of them is equipped with a rubber ring socket to which a mounting pipe is applied as specified by the Sewerage Association standards.
【００２０】 そして、この継手５は塩ビ製であって、軸長約４７０mm、径約３２０mmφの大 きさで、ストッパ−部１６と第２のゴム輪嵌合溝１８とは約８０mm、第２のゴム 輪嵌合溝１８と第１のゴム輪嵌合溝１７とは７０mmの間隔となっている。[0020] Then, the coupling 5 is made of PVC, the axial length of about 470 mm, a large can of diameter 320 mm phi, the stopper - part 16 and the second rubber ring fitting groove 18 about 80 mm , the second rubber ring fitting groove 18 and the first rubber ring fitting groove 17 are spaced by 70 mm .
【００２１】 したがって、この点検筒６は、マンホ−ル本体１に対し、左右方向の取付角度 が５°調整でき、マンホ−ル本体１が下水本管の勾配のため、設計値より傾いて も、点検筒６はゴム輪受口２０によって首振り調整ができ鉛直性を保持できる。Therefore, the inspection tube 6 can be adjusted in the horizontal mounting angle of 5 ° with respect to the manhole body 1, and the manhole body 1 is inclined from the design value due to the inclination of the main sewer pipe. The inspection cylinder 6 can be swung by the rubber ring receiving port 20 to maintain verticality.
【００２２】 その結果、ゴム輪が２本以上となり、浸入水を防止できるのは勿論、地震発生 により点検筒６が左右方向に揺れると、マンホ−ル本体１に対してゴム輪受口２ ０でその揺れを吸収でき、また、点検筒６が上下方向に揺れるとマンホ−ル本体 １に対し第１および第２のゴム輪嵌合溝１７，１８のゴム輪を介して、上下動可 能となって吸収できるものである。ひいては、耐震性の塩ビ製小口径マンホ−ル ということができる。As a result, the number of rubber rings becomes two or more, which can prevent the infiltration of water, and of course, when the inspection tube 6 sways in the lateral direction due to the occurrence of an earthquake, the rubber ring receiving port 20 is attached to the manhole main body 1. Can absorb the sway, and when the inspection cylinder 6 sways in the vertical direction, it can move up and down with respect to the manhole body 1 via the rubber rings of the first and second rubber ring fitting grooves 17 and 18. And can be absorbed. As a result, it can be said that it is a small-diameter PVC manhole with earthquake resistance.
【００２３】 この点検筒６の上端には内蓋８が設けられ、この内蓋８は、図２に示すように 保護鉄蓋９により空間を介して、カバ−されている。この保護鉄蓋９は、円筒状 の本体１０と、この本体１０の上面に開閉自在に設けられた鉄蓋１１とから構成 されている。この本体１０の下端外周にフランジ１２が設けられ、このフランジ １２がド−ナツ状の沈下防止板１３に載置されて保護鉄蓋９を支持している。An inner lid 8 is provided on the upper end of the inspection cylinder 6, and the inner lid 8 is covered by a protective iron lid 9 through a space as shown in FIG. The protective iron lid 9 is composed of a cylindrical main body 10 and an iron lid 11 provided on the upper surface of the main body 10 so as to be openable and closable. A flange 12 is provided on the outer periphery of the lower end of the main body 10, and the flange 12 is placed on a doughnut-shaped sinking prevention plate 13 to support the protective iron lid 9.
【００２４】 次に、本実施の形態例の作用を述べる。マンホ−ル本体１の点検筒用開口部４ に継手５を挿入して点検筒用開口部４の先端をストッパ−部１６に当接させる。 このマンホ−ル本体１を、公道に掘削された溝に仮設置する。Next, the operation of this embodiment will be described. The joint 5 is inserted into the inspection tube opening 4 of the manhole body 1 and the tip of the inspection tube opening 4 is brought into contact with the stopper portion 16. This manhole body 1 is temporarily installed in a groove excavated on a public road.
【００２５】 次いで、深さ測定棒（不図示）によって、地表ＧＬからマンホ−ル本体１迄の 深さＨを測り、設計通りに埋設できたかどうかを確認する。次に、深さＨからｈ 1 を引いた長さで点検筒６の上端側を切管し、この切管された点検筒６をカラ− 継手５の第２のゴム輪嵌入溝１８に嵌入された断面４角状のゴム輪１８ａの所迄 挿入してストップさせる。Next, the depth H from the ground surface GL to the main body 1 of the manhole is measured with a depth measuring rod (not shown), and it is confirmed whether or not it was buried as designed. Next, depth H to h 1 The upper end side of the inspection tube 6 is cut with a length drawn by, and the cut inspection tube 6 is inserted into the second rubber wheel insertion groove 18 of the color joint 5 and has a square cross section. Insert up to 18a and stop.
【００２６】 その結果、当該マンホ−ル本体１に必要な配管勾配に対応して点検筒６は約４ °以内の角度調整ができるので、点検筒６は鉛直状にセットすることができる。As a result, since the inspection tube 6 can be adjusted in angle within about 4 ° in accordance with the pipe gradient required for the manhole body 1, the inspection tube 6 can be set vertically.
【００２７】 次いで、この点検筒６の周辺を充分に突き固めてから、沈下防止板１３を設置 する。その後、沈下防止板１３の上に保護鉄蓋９を載置してから、周辺を充分に 突き固めて埋め戻しをする。その後、コンクリ−トまたはアスファルト１９を舗 装する。セット後、保護鉄蓋９と内蓋８との間には空間を設けているので、保護 鉄蓋９に予想されている荷重がかかっても、内蓋８にはこの荷重はかからない。Next, the periphery of the inspection cylinder 6 is sufficiently tamped, and then the subsidence prevention plate 13 is installed. After that, the protective iron lid 9 is placed on the subsidence prevention plate 13, and then the periphery is sufficiently tamped and backfilled. After that, concrete or asphalt 19 is paved. Since a space is provided between the protective iron lid 9 and the inner lid 8 after setting, even if the expected load is applied to the protective iron lid 9, this load is not applied to the inner lid 8.
【００２８】 一方、予想外の大荷重がかかったり、沈下防止板１３が予想外に沈下すれば、 保護鉄蓋９にかかる荷重がそのまま内蓋８に伝えられる。そのとき、点検筒６は 第２のゴム輪嵌入溝１８に嵌入されたゴム輪１８ａの摩耗抵抗に抗して、ストッ パ−部１６迄滑り落ちるので、点検筒６およびマンホ−ル本体１は破損しない。On the other hand, if an unexpectedly large load is applied or the sinking prevention plate 13 sinks unexpectedly, the load applied to the protective iron lid 9 is transmitted to the inner lid 8 as it is. At that time, the inspection cylinder 6 slides down to the stopper portion 16 against the abrasion resistance of the rubber ring 18a fitted in the second rubber ring fitting groove 18, so that the inspection cylinder 6 and the manhole body 1 are damaged. do not do.
【００２９】 なお、本実施の形態例の継手５は、上端側に第１および第２のゴム輪嵌合溝１ ７，１８を形成し、下端側にゴム輪受口２０を形成しているが、本考案はこれに 限らず、この１７，１８と２０とを上下逆にしてもよい。 また、上端側の第１および第２のゴム輪嵌合溝１７，１８を止め、下端側のゴ ム輪受口２０と同様のものを逆向きに設けてもよい。The joint 5 of the present embodiment has the first and second rubber ring fitting grooves 17 and 18 formed on the upper end side and the rubber ring receiving port 20 formed on the lower end side. However, the present invention is not limited to this, and these 17, 18, and 20 may be turned upside down. Alternatively, the first and second rubber wheel fitting grooves 17 and 18 on the upper end side may be stopped, and the same rubber wheel receiving opening 20 on the lower end side may be provided in the opposite direction.
【００３０】 すなわち、このゴム輪受口２０は、図示しないが単独で構成され、上端側にゴ ム輪を、下端側にストッパ−部を、該ストッパ部の上側に拡径部を、それぞれ設 けた、下水道協会規格で規定された取付け管適用型のゴム輪受口で構成してもよ い。That is, the rubber wheel receiving port 20 is not shown, but is configured independently, and a rubber wheel is provided on the upper end side, a stopper portion is provided on the lower end side, and an enlarged diameter portion is provided on the upper side of the stopper portion. It may be configured with a rubber ring socket that is applicable to the mounting pipe specified by the standard for girders and sewerage associations.
【００３１】 また、点検筒６の内蓋８は、傾斜路面用蓋（口環が傾斜状に切断されたもの） を用いてもよい。As the inner lid 8 of the inspection tube 6, a lid for a sloped road surface (a mouth ring cut in an inclined shape) may be used.
【００３２】[0032]
【考案の効果】 本考案によれば、マンホ−ル本体に点検筒用開口部を設け、これにゴム輪受口 を介在させて点検筒の鉛直性を調整できるように接続したので、大量生産され、 かつ、寸法精度の高い塩ビ製マンホ−ル本体でありながら、下水本管の多様な勾 配に対応して、点検筒を鉛直方向に調整でき、ひいては、点検視認に支障を与え ないばかりか、保護鉄蓋と路面とのすり合せも良好となって、寸法精度の高いマ ンホ−ル本体と相俟って、マンホ−ルの施工精度を向上させる。EFFECTS OF THE INVENTION According to the present invention, the manhole main body is provided with an opening for the inspection tube, and the rubber ring socket is interposed in the opening to connect the inspection tube so that the verticality of the inspection tube can be adjusted. Although it is a PVC manhole body with high dimensional accuracy, the inspection tube can be adjusted vertically to accommodate various distribution of sewer mains, which in turn does not hinder visual inspection. In addition, the protective iron lid and the road surface are well fitted together, and the manhole construction accuracy is improved in combination with the manhole main body having high dimensional accuracy.
【００３３】 殊に、下水道協会規格（ＪＳＷＡＳ，Ｋ−１）で規定された取付け管適用型の ゴム輪受口をマンホ−ル本体と点検筒との間に介在させたので、点検筒をマンホ −ル本体に接続した後、自在継手を特に設ける必要がない、僅少な配管勾配変化 にマッチした微調整には好都合となり、点検筒の上端側を首振りさえさせれば、 直ちに鉛直性が得られ、コンクリ−ト製マンホ−ルと同様、工事現場に適合した 施工となって道路下埋設のマンホ−ルの完了点検に合格させることができる。勿 論、点検筒と沈下防止板との遊嵌間隙を小にしながら保護鉄蓋の装着には全く支 障がない。In particular, since the rubber ring receptacle of the mounting pipe application type defined by the Sewerage Association Standard (JSWAS, K-1) is interposed between the manhole main body and the inspection pipe, the inspection pipe is -After connecting to the main body, it is convenient for fine adjustment that matches a slight pipe gradient change without the need to install a universal joint, and verticality can be immediately obtained by swinging the upper end side of the inspection tube. As with concrete manholes, the construction can be adapted to the construction site and pass the completion inspection of manholes buried under the road. As a matter of course, there is no problem in mounting the protective iron cover while reducing the loose fitting gap between the inspection tube and the subsidence prevention plate.
【図１】本考案の実施の形態例の要部断面図である。FIG. 1 is a sectional view of an essential part of an embodiment of the present invention.
【図２】図１の実施の形態例に適用の参考例である。FIG. 2 is a reference example applied to the embodiment of FIG.
１…マンホ−ル本体、４…点検筒用開口部、５…継手、
６…点検筒、８…内蓋、９…保護鉄蓋、１０…本体、１
１…鉄蓋、１３…沈下防止板1 ... Manhole body, 4 ... Inspection tube opening, 5 ... Joint,
6 ... Inspection tube, 8 ... Inner lid, 9 ... Protective iron lid, 10 ... Main body, 1
1 ... Iron lid, 13 ... Settling prevention plate
Claims (1)
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、下流側の接続部をそれぞれ設けると共に、口径
３００〜５００mmφで、かつ、上端に内蓋を設けた点検
筒を立設する点検筒用開口部を設け、前記内蓋を、円筒
状本体と鉄蓋からなる保護鉄蓋で、空間を介して、カバ
−し、該保護鉄蓋を、前記点検筒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、 前記点検筒用開口部（４）と点検筒（６）との間に、下
または上端側にゴム輪を、上または下端側にストッパ−
部（１６）を、該ストッパ−部（１６）の下または上側
に拡径部を、それぞれ設けたゴム輪受口（２０）を介在
させることにより、前記点検筒（６）を鉛直状に微調整
可能としたことを特徴とする塩ビ製小口径マンホ−ル。1. A PVC sewage main buried under a road,
A small-diameter manhole made of PVC is provided, and an inspection cylinder having a small-diameter manhole main body with upper and lower-side connecting portions respectively, a diameter of 300 to 500 mm φ, and an inner lid at the upper end. An opening for an inspection cylinder to be erected is provided, and the inner lid is covered with a protective iron lid composed of a cylindrical body and an iron lid through a space, and the protective iron lid is loosely fitted to the inspection cylinder. In the small-diameter manhole supported by the subsidence prevention plate, a rubber ring is provided on the lower or upper end side and on the upper or lower end side between the inspection tube opening (4) and the inspection tube (6). Stopper
The inspection tube (6) is finely moved vertically by interposing the rubber ring receiving ports (20) provided with the enlarged diameter portions of the portion (16) below or above the stopper portion (16). A small-diameter PVC manhole characterized by being adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1996010844U JP2589466Y2 (en) | 1996-10-04 | 1996-10-04 | PVC small diameter manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1996010844U JP2589466Y2 (en) | 1996-10-04 | 1996-10-04 | PVC small diameter manhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09237U true JPH09237U (en) | 1997-04-22 |
| JP2589466Y2 JP2589466Y2 (en) | 1999-01-27 |
Family
ID=11761670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1996010844U Expired - Fee Related JP2589466Y2 (en) | 1996-10-04 | 1996-10-04 | PVC small diameter manhole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2589466Y2 (en) |
-
1996
- 1996-10-04 JP JP1996010844U patent/JP2589466Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2589466Y2 (en) | 1999-01-27 |
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