JP4089930B2 - Cover for underground structure - Google Patents

Cover for underground structure Download PDF

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Publication number
JP4089930B2
JP4089930B2 JP33968198A JP33968198A JP4089930B2 JP 4089930 B2 JP4089930 B2 JP 4089930B2 JP 33968198 A JP33968198 A JP 33968198A JP 33968198 A JP33968198 A JP 33968198A JP 4089930 B2 JP4089930 B2 JP 4089930B2
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Japan
Prior art keywords
lid
receiving frame
frame portion
end surface
lid body
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JP2000160583A (en
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和世 高澄
義和 日高
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Hinode Ltd
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Hinode Ltd
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Description

【０００１】
【発明の属する技術分野】
本発明は、蓋本体とこれを支持する受枠部とを有する地下構造物用蓋に関する。
なお、本願明細書でいう「地下構造物用蓋」とは、下水道における地下埋設物、地下構造物施設等と地上とを通じる開口部を閉塞する大型鉄蓋、マンホール蓋、汚水桝蓋、電力・通信における地下施設機器や配線等を保護する開閉可能な共同溝用鉄蓋、送電用鉄蓋、配電用鉄蓋、上水道やガス配管における路面下の埋設導管およびその付属機器と地上とを結ぶ開閉扉としての機能を有する消火栓蓋、制水弁蓋、仕切弁蓋、空気弁蓋、ガス配管用蓋、量水器蓋等を総称する。
【０００２】
【従来の技術】
地下構造物用蓋は、通常時においては路面の一部としての機能を果たし、また、地下構造物内部の保守管理作業を行う場合には蓋本体を開蓋し作業を行う。そのため蓋本体或いは受枠部には、開蓋用冶具挿入部が形成されている。このような地下構造物用蓋において、受枠部に開蓋用冶具挿入部を設けたものとして、例えば、実公平７−２８２０２号公報に記載されたものがある。この地下構造物用蓋（小口径桝用塩化ビニル製蓋）は、リング状外枠の内側面にコイン状蓋の外側面を密着させて取外し可能に内嵌したものである。そして、リング状外枠の内側面上縁にドライバ挿入切欠を設けることで、開蓋の際にはドライバ挿入切欠にドライバを差し込んでこじ開けるように構成している。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記構成の地下構造物用蓋においては、リング状外枠の内側面上縁にドライバ挿入切欠を設けているため、このドライバ挿入切欠からコイン状蓋とリング状外枠との間に雨水や土砂が侵入しやすく、特に土砂が侵入した場合には、この土砂がコイン状蓋とリング状外枠との間に噛み込んで開蓋し難くなるという問題がある。さらに、開蓋の際にはドライバをドライバ挿入切欠へ差し込み、コイン状蓋の外側面にドライバの先端を当接させながらこじ開けるようにしなければならないため開蓋作業が困難となるという問題もある。
【０００４】
本発明は、上述の点に鑑みてなされたもので、開蓋作業を容易に行うことのできる地下構造物用蓋を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明の地下構造物用蓋は、上端外周に周方向に沿って張出部を延設した蓋本体と、前記蓋本体を支持する筒状の受枠部とを有する地下構造物用蓋であって、前記受枠部は、前記蓋本体の前記張出部よりも幅広の上端面を備えるとともに、この上端面にその内周縁と外周縁とを含まないように形成され、上方に向けて開口した開蓋用治具挿入部を備え、前記蓋本体が前記受枠部に支持されたとき、前記蓋本体の前記張出部が前記開蓋用冶具挿入部の一部分のみを上方から覆うようにして前記受枠部の前記上端面に重ね合わされ、且つ、前記上端面の内周縁部に全周に亘って密着するものとなっている。
【０００６】
以上の構成において、蓋本体の張出部が開蓋用冶具挿入部の一部分のみを覆うように構成されているので、開蓋の際には、マイナスドライバ等の開蓋用冶具を開蓋用冶具挿入部に挿入し、開蓋用冶具の先端を張出部の下方に位置させた状態で、テコの要領で開蓋用冶具を押し下げることにより、容易に開蓋することができる。また、開蓋用冶具挿入部は、受枠部の上端面の内周縁と外周縁とを含まないように形成されているため、開蓋用冶具挿入部から蓋本体と受枠部との間に土砂等が侵入して噛み込むこともなく、開蓋の容易性が損なわれることもない。
【０００７】
【発明の実施の形態】
本発明において、前記受枠部の上端面には全周に亘って形成された段差部が設けられており、前記蓋本体が前記受枠部に支持され、前記蓋本体の張出部が前記段差部よりも内周側にて前記上端面に重ね合わされたとき、前記段差部は、前記蓋本体の上端面と前記段差部よりも外周側の受枠部の上端面とが略同一高さとなるような段差寸法を有し、そして、前記開蓋用治具挿入部は、前記段差部を横切って配置されている。
このような構成とすることで、蓋本体が受枠部の上方に突出することがないので地下構造物用蓋の上を通行する際の妨げとならない。また、上記のように開蓋用冶具を開蓋用冶具挿入部に挿入してテコの要領で開蓋する際に、開蓋用冶具の支点が作用点より高い位置となるので開蓋操作がさらに容易となる。
【０００８】
【実施例】
（実施例１）
図１は、本発明に係る地下構造物用蓋の概要を示す一部切欠斜視図、図２は、図１の要部拡大図である。
図１において、地下構造物用蓋１は、蓋本体７と、内筒体３と、内筒体３の上側に上下動可能に外挿され上端部に蓋本体７を支持する受枠部６を一体に形成した外筒体２とからなり、外筒体２の内周面には位置決め部としての環状溝４が上下方向に所定の間隔（実施例では等間隔）をおいて複数段形成され、環状溝４には外筒体２を内筒体３に位置決め支持する位置決め部材５が嵌合装着されている。
【０００９】
内筒体３は、例えば、地下に設置した底部台座（図示せず）上に載置され、その上端が路面（地面）から適宜の深さ位置に位置している。外筒体２の長さは、内筒体３の上端面３ａから路面までの距離よりも長く、外筒体２（蓋本体７）の路面に対する高さ位置を十分に調整可能とされている。これらの外筒体２および内筒体３は、耐食性を有し、軽量、かつ安価な例えば、塩化ビニル等の合成樹脂部材により形成されている。
【００１０】
位置決め部材５は、外側に突出する凸部５ａが全周に亘って形成され、環状溝４に嵌合装着可能なリング状をなし、この凸部５ａが環状溝４に嵌合装着された状態において、上端面５ｂが当該環状溝４の一段上の環状溝４の下端に、下端面５ｃが当該環状溝４の一段下の環状溝４の上端に位置するように設定されている。これにより、位置決め部材５は、凸部５ａが何れかの環状溝４に嵌合装着された状態において、下端面５ｃが内筒体３の上端面３ａに全周に亘り当接可能とされる。この位置決め部材５は、可撓性、耐食性を有し、かつ環状溝４への着脱を容易にするために適宜の弾性および硬さを有する例えば、硬質ゴム、或いはポリウレタンゴム等により形成されている。
【００１１】
受枠部６は、外筒体２の上部に一体に形成されており、内周面６ａが上方の開口端に臨んで僅かにテーパ状に拡開するテーパ面とされ、開口端外周には上端部としてのフランジ６ｂが形成されている。
蓋本体７は、その下面に外周嵌着面７ａが受枠部６の内周面６ａに沿うテーパ面として下方に延設して形成され、上端外周に全周に亘り張出部としてのフランジ７ｂが周方向に沿って延設して形成されている。また、外周嵌着面７ａの上端に例えば、防水用のパッキン８が外嵌されている。
【００１２】
受枠部６のフランジ６ｂは、その幅が蓋本体７のフランジ７ｂの幅よりも広く例えば、フランジ７ｂの幅の２倍程度とされており、上面に開蓋用冶具挿入部としての凹部６ｃが、同一円周上に周方向に等間隔で複数設けられている。また、各凹部６ｃは、図１において２点鎖線で示す蓋本体７のフランジ７ｂの外径線をまたぐように設けられており、蓋本体７が受枠部６に支持された状態では、図２に示すようにフランジ７ｂが凹部６ｃの一部分のみを覆うように形成されている。即ち、凹部６ｃの一部はフランジ７ｂの先端よりも内周側に位置し、残部はフランジ７ｂの先端よりも外周側に位置するように構成されている。
【００１３】
上記構成において、図２に示すように蓋本体７は、受枠部６に防水用のパッキン８を介して液密に嵌合装着されている。蓋本体７を開蓋する場合には図２に示すように凹部６ｃに開蓋用冶具例えば、マイナスドライバ１０の先端１０ａを挿入して蓋本体７のフランジ７ｂの外周縁下面に当てて作用点とし、先端１０ａの僅か後部位置１０ｂを凹部６ｃの開口縁に当てて支点とし、握り部１１を力点としてテコの要領で矢印方向に押し下げる。これにより、蓋本体７が押し上げられる。このような作業を各凹部６ｃにおいて順次行うことで、蓋本体７を均一に押し上げることができ、容易に、かつ円滑に開蓋することができる。
【００１４】
また、蓋本体７の外周嵌着面７ａと受枠部６の内周面６ａとの間には切欠部が一切なく、蓋本体７のフランジ７ｂの下面と受枠部６のフランジ６ｂの内周側上面が全周に亘り密着する。これにより、雨水、土砂等の流入および地下構造物内部からの悪臭の発散が防止され、止水性および防臭性が極めて高い状態に保持される。さらに、蓋本体７の外周嵌着面７ａと受枠部６の内周面６ａとをパッキン８を介して嵌合させているため、より一層止水性および防水性が向上する。
【００１５】
なお、パッキン８を介さずに外周嵌着面７ａと内周面６ａとを面合させて嵌合させるような構成としてもよい。また、蓋本体７のフランジ７ｂの下面と受枠部６のフランジ６ｂの上面との間にパッキンを介在させるようにしてもよい。
さらに、開蓋用冶具挿入部として、フランジ６ｂの上面を凹ませて凹部６ｃを形成したが、これに限るものではなく、単なる孔としてもよい。しかしながら、本実施例のように凹部６ｃとすることで、開蓋の際にマイナスドライバ１０の支点となる開口端周縁部の強度が保持され、耐久性の点で好ましい。
【００１６】
（実施例２）
図３は、本発明の第２の実施例を示し、受枠部６のフランジ６ｂに開蓋用冶具挿入部として凹部６ｃに代えて環状溝６ｄを形成したものである。このように開蓋用冶具挿入部を環状溝６ｄとすることで任意の箇所において開蓋操作を行うことができ、使い勝手がよい。
【００１７】
（実施例３）
図４は、本発明の第３の実施例を示し、受枠部６のフランジ６ｂの上面に、蓋本体７のフランジ７ｂの厚みと同じ高さを有する段部６ｆを全周に亘り形成したものである。これにより、蓋本体７が受枠部６に支持された状態において、蓋本体７（フランジ７ｂ）の上端面とフランジ６ｂの外周側上端面６ｅとが同一高さとなるので地下構造物用蓋１の上を通行する際にフランジ７ｂが妨げとならない。また、フランジ６ｂの外周側上端面６ｅが段部６ｆの分だけ高くなったことで、前述したようにマイナスドライバ１０等の一般的な開蓋用冶具を凹部６ｃに挿入してテコの要領で開蓋する際に、支点の位置が作用点の位置よりも高くなり、より容易に開蓋することができる。
【００１８】
なお、以上の各実施例においては、受枠部を内筒体の上側に位置する外筒体に一体に形成した地下構造物用蓋について説明したが、本発明は、受枠部を外筒体とは別体に形成した地下構造物用蓋に適用可能であることは明らかである。
【００１９】
【発明の効果】
本発明の地下構造物用蓋では、蓋本体の張出部が開蓋用冶具挿入部の一部分のみを覆うように構成されているので、開蓋の際には、マイナスドライバ等の開蓋用冶具を開蓋用冶具挿入部に挿入しテコの要領で押し下げるだけで、容易に開蓋することができる。また、開蓋用冶具挿入部は、受枠部の上端面の内周縁と外周縁とを含まないように形成されているため、開蓋用冶具挿入部から蓋本体と受枠部との間に土砂等が侵入して噛み込むこともなく、開蓋の容易性が損なわれることもない。
【００２０】
さらに、受枠部の上端面に段部を全周に亘って形成し、前記蓋本体の上端面と受枠部の上端面とが略同一高さとなるように構成しているので、地下構造物用蓋の上を通過する際の妨げにならない。また、マイナスドライバ等の開蓋用冶具を開蓋用冶具挿入部に挿入してテコの要領で開蓋する際に、開蓋用冶具の開蓋用冶具挿入部に対する支点が作用点よりも高い位置となり、さらに容易に開蓋することができる。
【図面の簡単な説明】
【図１】本発明に係る地下構造物用蓋の第１の実施例を示す一部切欠斜視図である。
【図２】図１の開蓋用冶具挿入部および蓋本体の張出部の一部拡大図である。
【図３】本発明に係る地下構造物用蓋の第２の実施例を示す一部拡大図である。
【図４】本発明に係る地下構造物用蓋の第３の実施例を示す一部拡大図である。
【符号の説明】
１ 地下構造物用蓋
２ 外筒体
３ 内筒体
４ 位置決め部
５ 位置決め部材
６ 受枠部
６ａ 内周面
６ｂ フランジ（上端面）
６ｃ 凹部（開蓋用冶具挿入部）
６ｄ 環状溝（開蓋用冶具挿入部）
６ｅ 外周側上端面
６ｆ 段部
７ 蓋本体
７ａ 外周嵌着面
７ｂ フランジ（張出部）
８ パッキン
１０ マイナスドライバ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for an underground structure having a lid body and a receiving frame portion that supports the lid body.
As used herein, “underground structure lid” refers to a large iron lid, a manhole lid, a sewage culm lid, an electric power lid that closes an opening through an underground structure, an underground structure facility, etc. in a sewer. -Openable and closable joint groove iron covers, power transmission iron covers, power distribution iron covers, buried conduits under the road surface in waterworks and gas pipes, and their associated devices, which protect underground facilities equipment and wiring etc. in communications A fire hydrant lid having a function as an open / close door, a water control valve lid, a gate valve lid, an air valve lid, a gas pipe lid, a water meter lid, etc. are collectively referred to.
[0002]
[Prior art]
The underground structure lid normally functions as a part of the road surface, and when maintenance work inside the underground structure is performed, the lid body is opened to perform the work. Therefore, an opening jig insertion portion is formed in the lid body or the receiving frame portion. In such a cover for an underground structure, there is one described in Japanese Utility Model Publication No. 7-28202, for example, in which an opening jig insertion part is provided in the receiving frame part. This underground structure lid (vinyl chloride lid for small-diameter bottles) is fitted in such a manner that the outer surface of the coin-shaped lid is brought into close contact with the inner surface of the ring-shaped outer frame so as to be removable. A driver insertion notch is provided at the upper edge of the inner side surface of the ring-shaped outer frame so that the driver can be inserted into the driver insertion notch when the lid is opened.
[0003]
[Problems to be solved by the invention]
However, in the lid for an underground structure having the above-described structure, a driver insertion notch is provided at the upper edge of the inner surface of the ring-shaped outer frame, so that rainwater is inserted between the driver insertion notch and the coin-shaped lid and the ring-shaped outer frame. There is a problem that it is difficult for the earth and sand to enter, and particularly when earth and earth enter, the earth and sand bite between the coin-like lid and the ring-shaped outer frame, making it difficult to open the lid. Further, when opening the lid, it is necessary to insert the driver into the driver insertion notch and pry it open while the tip of the driver is in contact with the outer surface of the coin-like lid, which makes it difficult to open the lid.
[0004]
This invention is made | formed in view of the above-mentioned point, and it aims at providing the lid | cover for underground structures which can perform a lid opening operation | work easily.
[0005]
[Means for Solving the Problems]
The lid for an underground structure according to the present invention is a lid for an underground structure having a lid main body with a protruding portion extending in the circumferential direction on the outer periphery of the upper end and a cylindrical receiving frame portion that supports the lid main body. Te, the receiving frame part is provided with a wider upper surface than the protruding portion of the lid body is formed so as not to include its inner peripheral edge and the outer peripheral edge to the upper end face, it is open upward comprising a lid opening jig insertion portion, when said lid body is supported by the receiving frame part and the projecting portion of the lid body so as to cover only a portion of the jig insertion portion for opening the lid from above It overlaps with the upper end surface of the receiving frame portion and is in close contact with the inner peripheral edge portion of the upper end surface over the entire circumference .
[0006]
In the above configuration, the overhanging portion of the lid main body is configured to cover only a part of the opening jig insertion portion. Therefore, when opening the lid, the opening jig such as a flat-blade screwdriver is used for opening the lid. The lid can be easily opened by inserting it into the jig insertion portion and pushing down the opening jig in the manner of a lever in a state where the tip of the opening jig is positioned below the overhanging portion. In addition, since the opening jig insertion portion is formed so as not to include the inner and outer peripheral edges of the upper end surface of the receiving frame portion, the earth and sand between the opening jig insertion portion and the lid body and the receiving frame portion. Etc., and the ease of opening the lid is not impaired.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the upper end surface of the receiving frame portion is provided with a step portion formed over the entire circumference, the lid body is supported by the receiving frame portion, and the protruding portion of the lid body is the step portion. when superimposed on the upper face at an inner peripheral side than the step portion, such as the upper surface and the upper end face of the receiving frame portion of the outer peripheral side of the stepped portion of the lid body is substantially the same height as The opening jig insertion portion has a step size and is disposed across the step portion .
By setting it as such a structure, since a cover main body does not protrude above a receiving frame part, it does not become a hindrance at the time of passing on the cover for underground structures. In addition, when the opening jig is inserted into the opening jig insertion portion and opened as described above, the fulcrum of the opening jig is positioned higher than the action point as described above. It becomes easier.
[0008]
【Example】
Example 1
FIG. 1 is a partially cutaway perspective view showing an outline of a lid for an underground structure according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG.
In FIG. 1, an underground structure lid 1 includes a lid body 7, an inner cylindrical body 3, and a receiving frame portion 6 that is externally inserted on the upper side of the inner cylindrical body 3 and that supports the lid body 7 at an upper end portion. The outer cylindrical body 2 is integrally formed, and an annular groove 4 as a positioning portion is formed in a plurality of stages on the inner peripheral surface of the outer cylindrical body 2 at predetermined intervals (equal intervals in the embodiment) in the vertical direction. The annular groove 4 is fitted with a positioning member 5 for positioning and supporting the outer cylinder 2 on the inner cylinder 3.
[0009]
The inner cylinder 3 is placed, for example, on a bottom pedestal (not shown) installed in the basement, and its upper end is located at an appropriate depth position from the road surface (ground). The length of the outer cylinder 2 is longer than the distance from the upper end surface 3a of the inner cylinder 3 to the road surface, and the height position of the outer cylinder 2 (lid body 7) with respect to the road surface can be sufficiently adjusted. . The outer cylinder 2 and the inner cylinder 3 are made of a synthetic resin member such as vinyl chloride having corrosion resistance, light weight, and low cost.
[0010]
The positioning member 5 has a convex portion 5 a that protrudes outward, and has a ring shape that can be fitted and attached to the annular groove 4. The convex portion 5 a is fitted and attached to the annular groove 4. The upper end surface 5 b is set at the lower end of the annular groove 4 that is one step above the annular groove 4, and the lower end surface 5 c is set at the upper end of the annular groove 4 that is one step below the annular groove 4. As a result, the positioning member 5 is configured such that the lower end surface 5c can contact the upper end surface 3a of the inner cylinder 3 over the entire circumference in a state in which the convex portion 5a is fitted and attached to any of the annular grooves 4. . The positioning member 5 is made of, for example, hard rubber or polyurethane rubber having flexibility and corrosion resistance, and having appropriate elasticity and hardness to facilitate attachment to and removal from the annular groove 4. .
[0011]
The receiving frame portion 6 is integrally formed on the upper portion of the outer cylindrical body 2, and has an inner peripheral surface 6 a that is a tapered surface that slightly expands in a tapered manner facing the upper opening end, and has an upper end on the outer periphery of the opening end. A flange 6b as a part is formed.
The lid body 7 is formed with an outer peripheral fitting surface 7a extending downward as a tapered surface along the inner peripheral surface 6a of the receiving frame portion 6 on the lower surface thereof, and a flange 7b as an overhanging portion around the entire upper end outer periphery. Is formed extending along the circumferential direction. Further, for example, a waterproof packing 8 is fitted on the upper end of the outer peripheral fitting surface 7a.
[0012]
The flange 6b of the receiving frame portion 6 is wider than the flange 7b of the lid main body 7, for example, about twice the width of the flange 7b. A recess 6c as a lid opening jig insertion portion is formed on the upper surface. A plurality of them are provided at equal intervals in the circumferential direction on the same circumference. Each recess 6c is provided so as to straddle the outer diameter line of the flange 7b of the lid body 7 indicated by a two-dot chain line in FIG. 1, and in a state where the lid body 7 is supported by the receiving frame portion 6, FIG. As shown, the flange 7b is formed so as to cover only a part of the recess 6c. That is, a part of the recess 6c is positioned on the inner peripheral side with respect to the tip of the flange 7b, and the remaining part is positioned on the outer peripheral side with respect to the tip of the flange 7b.
[0013]
In the above configuration, as shown in FIG. 2, the lid body 7 is fitted and attached to the receiving frame portion 6 via a waterproof packing 8 in a liquid-tight manner. When the lid body 7 is opened, as shown in FIG. 2, an opening jig, for example, a tip 10a of a minus driver 10 is inserted into the recess 6c and applied to the lower surface of the outer peripheral edge of the flange 7b of the lid body 7. The slightly rear position 10b of the tip 10a is applied to the opening edge of the recess 6c as a fulcrum, and the grip 11 is pushed down in the direction of the arrow in the manner of a lever. Thereby, the lid body 7 is pushed up. By sequentially performing such an operation in each recess 6c, the lid body 7 can be pushed up uniformly, and the lid can be opened easily and smoothly.
[0014]
Further, there is no notch between the outer peripheral fitting surface 7 a of the lid body 7 and the inner peripheral surface 6 a of the receiving frame portion 6, and the lower surface of the flange 7 b of the lid main body 7 and the inner peripheral side of the flange 6 b of the receiving frame portion 6. The upper surface adheres over the entire circumference. As a result, inflow of rainwater, earth and sand, and the emission of malodor from the inside of the underground structure are prevented, and the water-stopping and deodorizing properties are kept extremely high. Furthermore, since the outer peripheral fitting surface 7a of the lid body 7 and the inner peripheral surface 6a of the receiving frame portion 6 are fitted through the packing 8, the water-stopping property and waterproofness are further improved.
[0015]
In addition, it is good also as a structure which makes the outer periphery fitting surface 7a and the inner peripheral surface 6a face and fit, without interposing the packing 8. FIG. Further, a packing may be interposed between the lower surface of the flange 7 b of the lid body 7 and the upper surface of the flange 6 b of the receiving frame portion 6.
Furthermore, although the upper surface of the flange 6b was recessed as the opening jig insertion part, the recessed part 6c was formed, it is not restricted to this, It is good also as a mere hole. However, the recess 6c as in the present embodiment is preferable in terms of durability because the strength of the peripheral edge of the opening end, which is a fulcrum of the minus driver 10 when the lid is opened, is maintained.
[0016]
(Example 2)
FIG. 3 shows a second embodiment of the present invention, in which an annular groove 6d is formed in the flange 6b of the receiving frame portion 6 as a lid opening jig insertion portion instead of the recess 6c. In this way, by opening the lid opening jig insertion portion to the annular groove 6d, it is possible to perform the lid opening operation at an arbitrary location, which is easy to use.
[0017]
(Example 3)
FIG. 4 shows a third embodiment of the present invention, in which a step 6f having the same height as the thickness of the flange 7b of the lid body 7 is formed on the entire upper surface of the flange 6b of the receiving frame 6 over the entire circumference. It is. Thereby, in the state in which the lid body 7 is supported by the receiving frame portion 6, the upper end surface of the lid body 7 (flange 7b) and the outer peripheral side upper end surface 6e of the flange 6b have the same height. The flange 7b does not hinder when passing over. In addition, since the upper end surface 6e on the outer peripheral side of the flange 6b is increased by the stepped portion 6f, a general opening jig such as a flat-blade screwdriver 10 is inserted into the recess 6c as described above, as described above. When the lid is opened, the position of the fulcrum becomes higher than the position of the action point, and the lid can be opened more easily.
[0018]
In each of the above-described embodiments, the cover for an underground structure has been described in which the receiving frame portion is integrally formed with the outer cylindrical body positioned on the upper side of the inner cylindrical body, but the present invention describes the receiving frame portion as the outer cylindrical body. It is clear that can be applied to the lid for underground structures formed separately.
[0019]
【The invention's effect】
In the underground structure lid of the present invention, the overhanging portion of the lid main body is configured to cover only a part of the opening jig insertion portion. By simply inserting the jig into the opening jig insertion section and pushing it down in the manner of a lever, the lid can be opened easily. In addition, since the opening jig insertion portion is formed so as not to include the inner and outer peripheral edges of the upper end surface of the receiving frame portion, the earth and sand between the opening jig insertion portion and the lid main body and the receiving frame portion. Etc., and the ease of opening the lid is not impaired.
[0020]
Further, formed over the entire circumference of the stepped portion on the upper end face of the receiving frame part, since the upper end face of the upper end surface and the receiving frame portion of the cover body is configured to be substantially the same height as, for underground structures Does not interfere with passing over the lid. Also, when a lid opening jig such as a flat-blade screwdriver is inserted into the opening jig insertion portion and opened in the manner of a lever, the fulcrum for the opening jig insertion portion is higher than the operating point. Position and can be opened more easily.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing a first embodiment of an underground structure lid according to the present invention.
FIG. 2 is a partially enlarged view of the opening jig insertion portion and the protruding portion of the lid body of FIG. 1;
FIG. 3 is a partially enlarged view showing a second embodiment of the lid for an underground structure according to the present invention.
FIG. 4 is a partially enlarged view showing a third embodiment of the lid for an underground structure according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lid for underground structures 2 Outer cylinder 3 Inner cylinder 4 Positioning part 5 Positioning member 6 Receiving frame part 6a Inner peripheral surface 6b Flange (upper end surface )
6c recess (opening jig insertion part)
6d annular groove (opening jig insertion part)
6e Outer peripheral upper end surface 6f Stepped portion 7 Lid body 7a Outer peripheral fitting surface 7b Flange (overhang)
8 Packing 10 Slotted screwdriver

Claims (2)

上端外周に周方向に沿って張出部を延設した蓋本体と、前記蓋本体を支持する筒状の受枠部とを有する地下構造物用蓋であって、
前記受枠部は、前記蓋本体の前記張出部よりも幅広の上端面を備えるとともに、この上端面にその内周縁と外周縁とを含まないように形成され、上方に向けて開口した開蓋用治具挿入部を備え、
前記蓋本体が前記受枠部に支持されたとき、前記蓋本体の前記張出部が前記開蓋用冶具挿入部の一部分のみを上方から覆うようにして前記受枠部の前記上端面に重ね合わされ、且つ、前記上端面の内周縁部に全周に亘って密着することを特徴とする地下構造物用蓋。A lid for an underground structure having a lid main body with a protruding portion extending along the circumferential direction on the outer periphery of the upper end, and a cylindrical receiving frame portion that supports the lid main body,
The receiving frame portion is provided with a wider upper surface than the protruding portion of the lid body is formed so as not to include its inner peripheral edge and the outer peripheral edge to the upper end face, is open upwardly opened cover Jig insert part for
When the lid body is supported by the receiving frame portion, the protruding portion of the lid body is overlapped with the upper end surface of the receiving frame portion so as to cover only a part of the opening jig insertion portion from above. And the lid | cover for underground structures characterized by sticking to the inner peripheral edge part of the said upper end surface over the perimeter . 前記受枠部の前記上端面には全周に亘って形成された段差部が設けられており、
前記蓋本体が前記受枠部に支持され、前記蓋本体の張出部が前記段差部よりも内周側にて前記上端面に重ね合わされたとき、前記段差部は、前記蓋本体の上端面と前記段差部よりも外周側の前記受枠部の前記上端面とが略同一高さとなるような段差寸法を有し、
前記開蓋用治具挿入部は、前記段差部を横切って配置されている請求項１に記載の地下構造物用蓋。The upper end surface of the receiving frame portion is provided with a step portion formed over the entire circumference ,
When the lid body is supported by the receiving frame portion, and the protruding portion of the lid body is superimposed on the upper end surface on the inner peripheral side of the stepped portion, the stepped portion is connected to the upper end surface of the lid main body. It said upper surface of said receiving frame portion of the outer peripheral side of the stepped portion has a step size such that substantially the same height,
The lid for an underground structure according to claim 1, wherein the opening jig insertion portion is disposed across the stepped portion .
JP33968198A 1998-11-30 1998-11-30 Cover for underground structure Expired - Fee Related JP4089930B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33968198A JP4089930B2 (en) 1998-11-30 1998-11-30 Cover for underground structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33968198A JP4089930B2 (en) 1998-11-30 1998-11-30 Cover for underground structure

Publications (2)

Publication Number Publication Date
JP2000160583A JP2000160583A (en) 2000-06-13
JP4089930B2 true JP4089930B2 (en) 2008-05-28

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Family Applications (1)

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