JP3614728B2

JP3614728B2 - Iron lid receiving frame device

Info

Publication number: JP3614728B2
Application number: JP23388699A
Authority: JP
Inventors: 清石田
Original assignee: 株式会社トミス
Priority date: 1999-08-20
Filing date: 1999-08-20
Publication date: 2005-01-26
Anticipated expiration: 2019-08-20
Also published as: JP2001055752A

Description

【０００１】
【発明の属する技術分野】
本発明は、地中に設置される中空構造体の上端部に設けられる受け枠部により鉄蓋を嵌合支持す鉄蓋受け枠装置に関する。
【０００２】
【従来の技術】
特に、都市部あるいはその近郊の地下には、水道、ガスあるいは電気などを供給するための布設管が埋設されており、これらの布設管には切換弁などの制御弁あるいはコネクターやブレーカー等が適宜接続されており、これらを路面上から操作したり、保守点検したり、更にこれらを保護するとともに設置場所を明示する必要がある。この目的のために、中空構造の埋設筐を地中に埋設状態で設置することが行なわれている。なお、マンホールの場合にも、同様の埋設筐を設置することがある。
【０００３】
上記の地中に設置される中空構造体の地面（路面）近傍の上端開口部は鉄蓋によって開閉可能に覆われている。この鉄蓋は、前記中空構造体の上端部に設けられる受け枠部の鉄蓋支持面により路面（地面）と略同一高さに嵌合支持されている。また、前記鉄蓋は、前記受け枠部に対して鉄蓋連結構造により開閉可能に連結されており、その一側部分を持ち上げて上方へ回動させて開くように、その反対側部分で前記受け枠部に対して回動可能に連結されている。本発明は、地中に設置される前記中空構造体の上端部に設けられる前記受け枠部により前記鉄蓋を嵌合支持する鉄蓋受け枠装置に関する。
【０００４】
【発明が解決しようとする課題】
しかしながら、従来の鉄蓋受け枠装置においては、受け枠部の鉄蓋嵌合支持部は全体的に壁面状に形成されていたので、地面上から鉄蓋と受け枠部との間を通して侵入する土砂や異物はその全てが鉄蓋嵌合支持部に詰まってしまい、詰まった土砂等はさらに路面荷重によって踏み固められ、そのため、鉄蓋を開ける際に該鉄蓋を持ち上げることが困難になり、埋設筐の内部の保守点検や受け枠部の嵩上げ作業などに多大の手間を要することがあった。
【０００５】
本発明はこのような技術的課題に鑑みてなされたものであり、本発明の目的は、鉄蓋と受け枠部との間に詰まった土砂等の異物を容易に除去するできることから、鉄蓋嵌合支持部の土砂詰まり等を容易に解消でき、長期間経過後でも鉄蓋を容易に開閉することができ、取扱い性及び作業性にすぐれた鉄蓋受け枠装置を提供するものである。
【０００６】
【課題解決のための手段】
本発明（請求項１）は、上記目的を達成するため、地中に設置される中空構造体の上端部に設けられる受け枠部により鉄蓋を嵌合支持する鉄蓋受け枠装置において、前記受け枠部の内周部に該受け枠部のほぼ全高にわたる凹部を形成するとともに該凹部の周方向所定間隔の位置に該凹部を周方向に分割するように略上下方向に延びる補強リブを形成し、前記補強リブの内縁部の上下方向中間部に前記受け枠部の周方向に延びる棚部を一体に形成することにより該棚部の上下に前記中空構造体の内部空間と前記凹部内の空間とを連通する上部開口部及び下部開口部を形成し、前記受け枠部に嵌合される鉄蓋の周縁部下面を前記棚部の上面で支持し、前記鉄蓋と前記受け枠部との間を通して外部から侵入する土砂を、前記上部開口部から前記凹部内へ導き、さらに該凹部から前記下部開口部を通して前記中空構造体の内部へ落下させ得ることを特徴とする。
【０００７】
請求項２の発明は、上記請求項１の構成に加えて、前記棚部の上面に、前記鉄蓋の周縁部下面と当接するゴム状弾性体のパッキンを取り付ける構成とすることにより、一層効率よく上記目的を達成するものである。
【０００８】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態を説明する。図１は本発明を適用した鉄蓋受け枠装置の一実施例を備えた埋設筐の鉄蓋を閉じた状態を示す図３中の線１−１に沿った縦断面図であり、図２は図１の埋設筐において鉄蓋を開いた状態を示す縦断面図であり、図３は図１の埋設筐の平面図である。
【０００９】
図１〜図３において、地下に埋設された筒状（図示の例では長方形断面の筒状）の制水弁筐やマンホール等の中空構造体（埋設構造物、埋設筐）１の上端面には、中央開口を有する環状（図示の例では四角の環状）の受け枠部２が設けられており、この受け枠部２の開口部に同様の形状（四角形状）をした鉄蓋３が嵌合支持されている。図中の符号４は地面（又は路面）の高さ位置を例示するものである。前記受け枠部２及び前記鉄蓋３は、通常、ダクタイル鋳鉄等の鋳造品で作られており、前記埋設筐（中空構造体）１はその構造や大きさに応じてコンクリート（レジンコンクリート等の特殊コンクリートを含む）や鋳造品（鋳鉄など）など種々の材質で作ることができる。また、前記受け枠部２が前記埋設筐１に一体に設けられる場合は、両者は同じ材質で形成される。
【００１０】
前記鉄蓋３は、その周縁の一部（図示の例では一方の短辺部）において、前記受け枠部２に対してリンク機構から成る鉄蓋連結機構１０を介して開閉可能（又は持ち上げ可能）に取り付けられている。図示の例では、前記鉄蓋連結機構１０は所定間隔をおいた２箇所に平列状態で設けられた連結部で構成されているが、これは１箇所又は３箇所以上に設けた連結部で構成してもよい。前記鉄蓋連結機構１０が設けられた辺の反対側の辺（対向する辺）には、把手付きの鉄蓋ロック機構５０が設けられている。この鉄蓋ロック機構５０は、鉄蓋３を図１の閉じ位置にロックするとともに、ロックを解除して該鉄蓋３を持ち上げて図２の開き位置まで開放するためのものである。
【００１１】
前記鉄蓋連結機構１０は、受け枠部２に対して、２つのリンク部材１１、１２を介して鉄蓋３を連結するように構成されている。つまり、前記鉄蓋３は、水平方向連結軸１３により連結された第１及び第２のリンク部材１１、１２を介して前記受け枠部２に連結されている。そして、前記第１のリンク部材１１は、他端部で前記受け枠部２の内部に設けられた水平方向連結軸１４に回動自在に連結されており、前記第２のリンク部材１２は、他端部で前記鉄蓋３の内側に設けられた水平方向連結軸１５に回動自在に連結されている。
【００１２】
図１及び図２において、前記鉄蓋ロック機構５０は、ロック部材５１と把手部材５２とを備えている。前記把手部材５２は、上下方向に延びる棒状本体部５３と該棒状本体部の上端部に設けられた把手部５４と該棒状本体部の下端部に設けられた抜け止めストッパ部５５とを備えている。一方、前記ロック部材５１は、前記棒状本体部５３に上下方向摺動自在に嵌合されており、筒状本体部５６と該筒状本体部の上端部に設けられたフランジ部５７と該筒状本体部の下端部に設けられた係合突起部（アーム部）５８とで構成されている。
【００１３】
そして、前記把手部材５２は、前記鉄蓋３に形成された開口（貫通孔）を通してその棒状本体部５３が延出し、その上端の把手部５４が図示のように鉄蓋３の上側（外面）に位置している。さらに、前記ロック部材５１の内径と前記棒状本体部５３の外径とには、両者５１、５３を回転方向には一体に回動するが軸方向には互いに摺動可能なように係合させるための凹溝及び凸条から成る凹凸係合部（軸方向に延びる凹凸係合部）が設けられている。そして、前記ロック部材５１は、前記把手部５４と前記抜け止めストッパ部５５により、前記棒状本体部５３から抜け落ちないように装着されている。
【００１４】
図１に示す鉄蓋ロック状態では、前記ロック部材５１は、そのフランジ部５７と係合突起部（アーム部）５８との間で受け枠部２の一部と鉄蓋３の一部を挟むような回転位置にあり、該鉄蓋３は図示の閉じ状態にロックされている。鉄蓋３を開く場合は、路面（地面）上から前記把手部５４を握って把手部材５２を持ち上げるとともに所定角度回転させることにより、前記係合突起部５８を受け枠部２から解放させるアンロック（ロック解除）位置にし、次いで、前記把手部材５２をさらに持ち上げることにより前記ロック部材５１を介して該鉄蓋３を持ち上げ、該鉄蓋３を前記鉄蓋連結機構１０のリンク作動を利用しながら上向きに回動させ、図２に示すような開き位置まで回動させて鉄蓋開き状態にする。鉄蓋３を開き状態から閉じ状態へ移動させる操作は、前述の開き操作と逆の動作に準じて行われる。
【００１５】
図２に示す鉄蓋開き状態においては、鉄蓋３の上面が受け枠部２の前記鉄蓋連結機構１０側の上端内周縁１９に当接し、該鉄蓋３は図示のような上方外向き方向に傾斜した安定した姿勢で開き位置に保持される。この図２の鉄蓋開き状態では、鉄蓋３の下面（内面）と受け枠部２の上端面との間の角度α（図２）を約１３５度に設定することが好ましい。その理由は、鉄蓋３の開き位置での安定保持と鉄蓋３の開閉作業の容易化とを配慮したことにある。そして、このような鉄蓋ロック機構５０によれば、鉄蓋３を開閉するための開閉手段をコンパクトな構成で鉄蓋自体に備付けで設けることができ、鉄蓋３を開けるための特別な開閉作業用の治具を必要とせず、作業性及び取扱い性にすぐれた鉄蓋開閉機構が得られる。
【００１６】
図４は図１中の受け枠部２、すなわち本発明を適用した鉄蓋受け枠装置の一実施例に係る受け枠部２の平面図であり、図５は図４中の線５−５に沿った縦断面図であり、図６は図４中の線６−６に沿った縦断面図であり、図７は図５中の線７−７（複数箇所）及び図６中の線７−７（複数箇所）に沿った部分断面図（全て実質的に同じ）である。図４〜図７において、前記受け枠部２の内周部には、嵌合支持される鉄蓋３の外周面より外方へ張り出す領域に形成されかつ内部に向かって（内端面が）開放された空洞部から成る凹部６１が設けられている。そして、この凹部６１の周方向所定間隔の各位置には略上下方向に延びる補強リブ６２が形成されている。つまり、前記凹部６１は、各補強リブ６２によって複数の区画に適宜分割され、内部に向かって開放された複数の空洞部分から構成されている。
【００１７】
前記補強リブ６２の内縁部の上下方向中間部には、受け枠部２の周方向に延びる棚部６３が略全周域にわたって一体的に形成されている。この棚部６３によって、前記凹部６１の内面開口部が上下に分割されている。つまり、前記棚部６１の上下に、前記受け枠部２の内部空間と前記凹部６１内の空間とを連通する上部開口６４及び下部開口６５が形成されている。前記上部開口６４は、前記鉄蓋３と前記受け枠部２との間を通して外部（地面上）から侵入する土砂等の異物を、前記凹部６１内へ導入するためのものである。また、前記下部開口６５は、前記凹部６１内へ導入された土砂等の異物を中空構造体１の内部へ落下させるためのものである。なお、前記棚部６３の上面には、前記鉄蓋３の周縁部下面と当接するパッキン６６が取り付けられている。このパッキン６６は、例えばウレタンゴム等のゴム状弾性体で作られており、鉄蓋３と受け枠部２との間を密封するためのものである。
【００１８】
以上説明した実施例によれば、地中に設置される中空構造体の上端部に設けられる受け枠部により鉄蓋を嵌合支持する鉄蓋受け枠装置において、前記受け枠部２の内周部に凹部６１を形成するとともに該凹部の周方向所定間隔の位置に略上下方向に延びる補強リブ６２を形成し、前記補強リブの内縁部の上下方向中間部に受け枠部の周方向に延びる棚部６３を一体に形成することにより該棚部の上側に受け枠部の内部空間と前記凹部内の空間とを連通する開口部６４を形成し、前記鉄蓋３と前記受け枠部２との間を通して外部から侵入する土砂を、前記開口部６４から前記凹部６１内の空間又は前記受け枠部の内部空間へ導き得る構成としたので、鉄蓋と受け枠部との間に詰まった土砂等の異物を前記凹部内の空間又は前記中空構造体の内部へ容易に落下させて除去できることから、鉄蓋嵌合支持部の土砂詰まり等を容易に解消でき、長期間経過後でも鉄蓋を容易に開閉することができ、取扱い性及び作業性にすぐれた鉄蓋受け枠装置が提供される。
【００１９】
前述の実施例では、さらに、前記棚部６３の上下に受け枠部２の内部空間と前記凹部６１内の空間とを連通する上部開口部６４及び下部開口部６５を形成し、前記鉄蓋３と前記受け枠部２との間を通して外部から侵入する土砂を、前記上部開口部６４から前記凹部６１内へ導き、さらに該凹部６１から前記下部開口部６５を通して前記中空構造体１の内部へ落下させ得るようにしたので、一層効率よく上記効果を奏することができる。また、前記棚部６３の上面に、前記鉄蓋３の周縁部下面と当接するゴム状弾性体のパッキン６６を取り付けることにより、該鉄蓋３と前記受け枠部２との間の密封性の向上及び騒音（打音発生）の防止（軽減）を図ることが好ましい。
【００２０】
図８は、本発明を適用した鉄蓋受け枠装置を有する埋設筐の全体構成を例示する縦断面図である。図８は中空構造体（埋設筐）１の内部に制水弁の一種である消火栓７０を収納する場合を示す。なお、上記実施例では、鉄蓋３（及び受け枠部２）が長方形をした四角断面の埋設筐の場合を例示したが、本発明は、円形断面や、多角形断面など、埋設筐の断面形状に関係なく広く適用可能であり、同様の作用効果が得られるものである。また、埋設筐あるいは中空構造体の種類、構造（一体型、積み重ね構造、内外嵌合型など）、大きさ、使用目的などにも関係なく広く適用可能であり、同様の作用効果が得られるものである。さらに、受け枠部が中空構造体と一体に形成される場合にも同様に適用可能であり、同様の作用効果を得ることができる。
【００２１】
【発明の効果】
以上の説明から明らかなごとく、本発明（請求項１）によれば、地中に設置される中空構造体の上端部に設けられる受け枠部により鉄蓋を嵌合支持する鉄蓋受け枠装置において、前記受け枠部の内周部に該受け枠部のほぼ全高にわたる凹部を形成するとともに該凹部の周方向所定間隔の位置に該凹部を周方向に分割するように略上下方向に延びる補強リブを形成し、前記補強リブの内縁部の上下方向中間部に前記受け枠部の周方向に延びる棚部を一体に形成することにより該棚部の上下に前記中空構造体の内部空間と前記凹部内の空間とを連通する上部開口部及び下部開口部を形成し、前記受け枠部に嵌合される鉄蓋の周縁部下面を前記棚部の上面で支持し、前記鉄蓋と前記受け枠部との間を通して外部から侵入する土砂を、前記上部開口部から前記凹部内へ導き、さらに該凹部から前記下部開口部を通して前記中空構造体の内部へ落下させ得る構成としたので、鉄蓋と受け枠部との間に詰まった土砂等の異物を前記凹部内の空間又は前記中空構造体の内部へ容易に落下させて除去できることから、鉄蓋嵌合支持部の土砂詰まり等を容易に解消でき、長期間経過後でも鉄蓋を容易に開閉することができ、取扱い性及び作業性にすぐれた鉄蓋受け枠装置が提供される。
【００２２】
請求項２の発明によれば、上記請求項１の構成に加えて、前記棚部の上面に、前記鉄蓋の周縁部下面と当接するゴム状弾性体のパッキンを取り付ける構成としたので、一層効率よく上記効果を達成することができる。
【図面の簡単な説明】
【図１】本発明を適用した鉄蓋受け枠装置の一実施例を備えた埋設筐の鉄蓋を閉じた状態を示す図３中の線１−１に沿った縦断面図である。
【図２】図１の埋設筐において鉄蓋を開いた状態を示す縦断面図である。
【図３】図１の埋設筐の平面図である。
【図４】本発明を適用した鉄蓋受け枠装置の一実施例である図１中の受け枠部の平面図である。
【図５】図４中の線５−５に沿った縦断面図である。
【図６】図４中の線６−６に沿った縦断面図である。
【図７】図５中の線７−７（複数箇所）及び図６中の線７−７（複数箇所）に沿った部分断面図である。
【図８】本発明を適用した鉄蓋受け枠装置を有する埋設筐の全体構成を例示する縦断面図である。
【符号の説明】
１中空構造体（埋設筐）
２受け枠部
３鉄蓋
４地面（路面）
１０鉄蓋連結手段
１１リンク部材
１２リンク部材
１３水平方向連結軸
１４水平方向連結軸
１５水平方向連結軸
５０鉄蓋ロック機構
５１ロック部材
５２把手部材
５３棒状本体部（把手部材）
５４把手部（把手部材）
５５抜け止めストッパ部（把手部材）
５６筒状本体部（ロック部材）
５７フランジ部（ロック部材）
５８係合突起部（ロック部材）
６１凹部（空洞部）
６２補強リブ
６３棚部
６４上部開口部
６５下部開口部
６６パッキン
７０消火栓[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an iron lid receiving frame device in which an iron lid is fitted and supported by a receiving frame portion provided at an upper end portion of a hollow structure body installed in the ground.
[0002]
[Prior art]
In particular, underground pipes for supplying water, gas or electricity are buried underground in urban areas or the suburbs, and control pipes such as switching valves or connectors and breakers are appropriately installed in these pipes. They are connected, and they need to be operated from the road surface, inspected, inspected, protected, and clearly set up. For this purpose, a hollow housing having a hollow structure is installed in a buried state in the ground. In the case of a manhole, a similar buried case may be installed.
[0003]
The upper end opening in the vicinity of the ground (road surface) of the hollow structure installed in the ground is covered with an iron lid so as to be opened and closed. This iron lid is fitted and supported at substantially the same height as the road surface (ground) by the iron lid support surface of the receiving frame provided at the upper end of the hollow structure. The iron lid is connected to the receiving frame portion so as to be openable and closable by an iron lid coupling structure, and the one side portion is lifted and rotated upward to open the opposite side portion. It is connected to the receiving frame portion so as to be rotatable. The present invention relates to an iron lid receiving frame device in which the iron lid is fitted and supported by the receiving frame portion provided at the upper end portion of the hollow structure body installed in the ground.
[0004]
[Problems to be solved by the invention]
However, in the conventional iron lid receiving frame device, since the iron lid fitting support portion of the receiving frame portion is formed in a wall shape as a whole, it penetrates from above the ground between the iron lid and the receiving frame portion. All the earth and sand and foreign matter are clogged in the iron lid fitting support part, and the clogged earth and sand etc. are further stepped and solidified by the road load, so it is difficult to lift the iron lid when opening the iron lid, In some cases, a great deal of labor is required for maintenance and inspection of the interior of the buried enclosure and for raising the receiving frame.
[0005]
The present invention has been made in view of such technical problems, and the object of the present invention is to easily remove foreign matters such as earth and sand clogged between the iron lid and the receiving frame portion. It is an object of the present invention to provide an iron lid receiving frame device that can easily eliminate clogging of the fitting support portion and can easily open and close the iron lid even after a long period of time, and is excellent in handling and workability.
[0006]
[Means for solving problems]
In order to achieve the above object, the present invention (Claim 1) is an iron lid receiving frame device in which an iron lid is fitted and supported by a receiving frame portion provided at an upper end portion of a hollow structure body installed in the ground. A recess is formed on the inner peripheral portion of the receiving frame portion over almost the entire height of the receiving frame portion, and a reinforcing rib extending in a substantially vertical direction is formed at a predetermined interval in the circumferential direction of the concave portion so as to divide the concave portion in the circumferential direction. And by integrally forming a shelf portion extending in the circumferential direction of the receiving frame portion at the middle portion in the vertical direction of the inner edge portion of the reinforcing rib, the internal space of the hollow structure and the inside of the recess portion are formed above and below the shelf portion. Forming an upper opening and a lower opening communicating with the space, supporting a lower surface of a peripheral edge of the iron lid fitted to the receiving frame on the upper surface of the shelf, and the iron lid and the receiving frame. The earth and sand entering from the outside through the space from the upper opening to the recess It leads to, characterized in that it can be further dropped from the recess into the interior of the hollow structure through the lower opening.
[0007]
In addition to the structure of the above-mentioned claim 1, the invention of claim 2 is more efficient by attaching a rubber-like elastic packing that contacts the lower surface of the peripheral edge of the iron lid to the upper surface of the shelf. Often achieves the above objectives.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 is a longitudinal sectional view taken along a line 1-1 in FIG. 3 showing a state in which an iron lid of a buried housing provided with an embodiment of an iron lid receiving frame device to which the present invention is applied. FIG. 3 is a longitudinal sectional view showing a state in which the iron lid is opened in the embedded housing of FIG. 1, and FIG. 3 is a plan view of the embedded housing of FIG.
[0009]
1 to 3, on the upper end surface of a hollow structure body (buried structure, buried housing) 1 such as a water control valve housing or manhole having a tubular shape (cylinder shape having a rectangular cross section in the illustrated example) buried underground. Is provided with an annular (square in the illustrated example) receiving frame portion 2 having a central opening, and an iron lid 3 having a similar shape (rectangular shape) is fitted into the opening portion of the receiving frame portion 2. It is supported. Reference numeral 4 in the figure illustrates the height position of the ground (or road surface). The receiving frame portion 2 and the iron lid 3 are usually made of a cast product such as ductile cast iron, and the embedded housing (hollow structure) 1 is made of concrete (resin concrete or the like) according to its structure and size. It can be made of various materials such as special concrete) and cast products (such as cast iron). Further, when the receiving frame portion 2 is provided integrally with the embedded housing 1, both are formed of the same material.
[0010]
The iron lid 3 can be opened and closed (or lifted) at a part of its periphery (one short side in the illustrated example) with respect to the receiving frame portion 2 via an iron lid coupling mechanism 10 comprising a link mechanism. ). In the example shown in the drawing, the iron lid coupling mechanism 10 is composed of a coupling portion provided in two rows at a predetermined interval, but this is a coupling portion provided at one or three or more locations. It may be configured. An iron lid locking mechanism 50 with a handle is provided on the side opposite to the side where the iron lid coupling mechanism 10 is provided (opposite side). The iron lid locking mechanism 50 is for locking the iron lid 3 in the closed position in FIG. 1 and releasing the lock to lift the iron lid 3 to the open position in FIG.
[0011]
The iron lid coupling mechanism 10 is configured to couple the iron lid 3 to the receiving frame portion 2 via two link members 11 and 12. That is, the iron lid 3 is connected to the receiving frame portion 2 via the first and second link members 11 and 12 connected by the horizontal connecting shaft 13. And the said 1st link member 11 is rotatably connected with the horizontal direction connection axis | shaft 14 provided in the inside of the said receiving frame part 2 by the other end part, The said 2nd link member 12 is The other end is rotatably connected to a horizontal connecting shaft 15 provided inside the iron lid 3.
[0012]
1 and 2, the iron lid lock mechanism 50 includes a lock member 51 and a handle member 52. The handle member 52 includes a rod-like main body portion 53 extending in the vertical direction, a handle portion 54 provided at the upper end portion of the rod-like main body portion, and a retaining stopper portion 55 provided at the lower end portion of the rod-like main body portion. Yes. On the other hand, the lock member 51 is fitted to the rod-like main body portion 53 so as to be slidable in the vertical direction, and a cylindrical main body portion 56, a flange portion 57 provided at an upper end portion of the cylindrical main body portion, and the cylinder. It is comprised with the engagement protrusion part (arm part) 58 provided in the lower end part of the main body part.
[0013]
The handle member 52 has a rod-like main body portion 53 extending through an opening (through hole) formed in the iron lid 3, and a handle portion 54 at the upper end thereof is on the upper side (outer surface) of the iron lid 3 as shown. Is located. Further, the inner diameter of the lock member 51 and the outer diameter of the rod-like main body 53 are engaged with each other so that both 51 and 53 are integrally rotated in the rotational direction but slidable in the axial direction. An uneven engaging portion (an uneven engaging portion extending in the axial direction) including a concave groove and a protruding line is provided. The lock member 51 is mounted by the handle portion 54 and the stopper stopper portion 55 so as not to fall out of the rod-shaped main body portion 53.
[0014]
In the iron cover lock state shown in FIG. 1, the lock member 51 sandwiches a part of the receiving frame part 2 and a part of the iron cover 3 between the flange part 57 and the engaging projection part (arm part) 58. The iron lid 3 is locked in the closed state shown in the figure. When opening the iron lid 3, the handle member 54 is lifted from the road surface (ground) to lift the handle member 52 and rotated by a predetermined angle, thereby releasing the engagement protrusion 58 from the frame 2. Then, the iron cover 3 is lifted via the lock member 51 by further lifting the handle member 52 and using the link operation of the iron lid coupling mechanism 10. Rotate upward and rotate to the open position as shown in FIG. 2 to open the iron lid. The operation of moving the iron lid 3 from the open state to the closed state is performed according to the operation opposite to the above-described opening operation.
[0015]
In the iron lid open state shown in FIG. 2, the upper surface of the iron lid 3 abuts on the upper inner peripheral edge 19 of the receiving frame portion 2 on the iron lid coupling mechanism 10 side, and the iron lid 3 faces upward as shown in the figure. It is held in the open position with a stable posture inclined in the direction. 2, the angle α (FIG. 2) between the lower surface (inner surface) of the iron lid 3 and the upper end surface of the receiving frame portion 2 is preferably set to about 135 degrees. The reason is that consideration has been given to the stable holding of the iron lid 3 at the open position and the ease of opening and closing the iron lid 3. And according to such an iron lid lock mechanism 50, the opening and closing means for opening and closing the iron lid 3 can be provided on the iron lid itself with a compact configuration, and a special opening and closing for opening the iron lid 3 is possible. An iron lid opening / closing mechanism excellent in workability and handleability can be obtained without requiring a work jig.
[0016]
4 is a plan view of the receiving frame portion 2 in FIG. 1, that is, the receiving frame portion 2 according to one embodiment of the iron lid receiving frame device to which the present invention is applied, and FIG. 5 is a line 5-5 in FIG. 6 is a vertical cross-sectional view taken along line 6-6 in FIG. 4, and FIG. 7 is a line 7-7 (multiple places) in FIG. 5 and a line in FIG. It is a fragmentary sectional view (all are substantially the same) along 7-7 (plural places). 4 to 7, the inner peripheral portion of the receiving frame portion 2 is formed in a region projecting outward from the outer peripheral surface of the iron lid 3 to be fitted and supported, and toward the inside (the inner end surface). A recess 61 is provided that is formed of an open cavity. Reinforcing ribs 62 extending substantially in the vertical direction are formed at predetermined positions in the circumferential direction of the recess 61. That is, the recess 61 is constituted by a plurality of hollow portions that are appropriately divided into a plurality of sections by the respective reinforcing ribs 62 and opened toward the inside.
[0017]
A shelf portion 63 extending in the circumferential direction of the receiving frame portion 2 is integrally formed over substantially the entire circumferential area at the middle portion in the vertical direction of the inner edge portion of the reinforcing rib 62. By the shelf 63, the inner surface opening of the recess 61 is vertically divided. That is, an upper opening 64 and a lower opening 65 that communicate the internal space of the receiving frame portion 2 and the space in the recess 61 are formed above and below the shelf portion 61. The upper opening 64 is for introducing foreign matter such as earth and sand entering from the outside (on the ground) through the space between the iron lid 3 and the receiving frame portion 2 into the recess 61. The lower opening 65 is for allowing foreign matter such as earth and sand introduced into the recess 61 to fall into the hollow structure 1. A packing 66 that contacts the lower surface of the peripheral edge of the iron lid 3 is attached to the upper surface of the shelf 63. The packing 66 is made of, for example, a rubber-like elastic body such as urethane rubber, and is for sealing between the iron lid 3 and the receiving frame portion 2.
[0018]
According to the embodiment described above, in the iron lid receiving frame device in which the iron lid is fitted and supported by the receiving frame portion provided at the upper end portion of the hollow structure installed in the ground, the inner periphery of the receiving frame portion 2 A concave portion 61 is formed in the portion, a reinforcing rib 62 extending substantially in the vertical direction is formed at a predetermined interval in the circumferential direction of the concave portion, and extends in the circumferential direction of the receiving frame portion at the middle portion in the vertical direction of the inner edge portion of the reinforcing rib. By forming the shelf 63 integrally, an opening 64 is formed on the upper side of the shelf so as to communicate the internal space of the receiving frame and the space in the recess, and the iron lid 3 and the receiving frame 2 Since the earth and sand entering from the outside through the space can be guided from the opening 64 to the space in the recess 61 or the internal space of the receiving frame part, the earth and sand clogged between the iron lid and the receiving frame part Such as the inside of the hollow structure or the space inside the recess. Since it can be easily dropped and removed, clogging of the iron lid fitting support part can be easily eliminated, and the iron lid can be easily opened and closed even after a long period of time, making it easy to handle and work. A lid receiving frame device is provided.
[0019]
In the above-described embodiment, an upper opening 64 and a lower opening 65 are formed above and below the shelf 63 so as to communicate the internal space of the receiving frame 2 and the space in the recess 61, and the iron lid 3. And sand that enters from the outside through the space between the receiving frame portion 2 and the receiving frame portion 2 are guided from the upper opening 64 into the concave portion 61, and further fall from the concave portion 61 into the hollow structure 1 through the lower opening 65. Therefore, the above effect can be achieved more efficiently. Further, by attaching a rubber-like elastic packing 66 in contact with the lower surface of the peripheral edge of the iron lid 3 to the upper surface of the shelf 63, the sealing property between the iron lid 3 and the receiving frame portion 2 is improved. It is preferable to improve and prevent (reduce) noise (occurrence of hitting sound).
[0020]
FIG. 8 is a longitudinal cross-sectional view illustrating the overall configuration of an embedded housing having an iron lid receiving frame device to which the present invention is applied. FIG. 8 shows a case where a fire hydrant 70, which is a type of water control valve, is housed inside the hollow structure (embedded housing) 1. In the above embodiment, the case where the iron lid 3 (and the receiving frame portion 2) is a rectangular cross-section embedded housing is illustrated, but the present invention is a cross-section of the embedded housing such as a circular cross section or a polygon cross section. It can be widely applied regardless of the shape, and the same effect can be obtained. It can be widely applied regardless of the type, structure (integrated type, stacked structure, internal / external fitting type, etc.), size, purpose of use, etc. It is. Furthermore, the present invention can be similarly applied to the case where the receiving frame portion is formed integrally with the hollow structure, and the same operational effects can be obtained.
[0021]
【The invention's effect】
As is apparent from the above description, according to the present invention (Claim 1), the iron lid receiving frame device for fitting and supporting the iron lid by the receiving frame portion provided at the upper end portion of the hollow structure body installed in the ground. And a recess extending substantially vertically in the inner peripheral portion of the receiving frame portion so as to divide the concave portion in the circumferential direction at a predetermined interval in the circumferential direction of the concave portion. Forming a rib and integrally forming a shelf portion extending in the circumferential direction of the receiving frame portion at an intermediate portion in the vertical direction of the inner edge portion of the reinforcing rib, whereby the internal space of the hollow structure and the space above and below the shelf portion An upper opening and a lower opening that communicate with the space in the recess are formed, the lower surface of the peripheral edge of the iron lid that is fitted to the receiving frame is supported by the upper surface of the shelf, and the iron lid and the receiver Sediment that enters from the outside through the space between the frame, the upper opening From the concave portion to the inside of the hollow structure through the lower opening, so that foreign matters such as earth and sand clogged between the iron lid and the receiving frame portion are removed from the concave portion. Since it can be easily dropped and removed into the inner space or inside the hollow structure, clogging of the iron lid fitting support portion can be easily eliminated, and the iron lid can be easily opened and closed even after a long period of time. Thus, an iron lid receiving frame device excellent in handling and workability is provided.
[0022]
According to the invention of claim 2, in addition to the structure of claim 1 above, the rubber elastic packing that contacts the lower surface of the peripheral edge of the iron lid is attached to the upper surface of the shelf. The above effects can be achieved efficiently.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view taken along a line 1-1 in FIG. 3 showing a state in which an iron cover of an embedded housing provided with an embodiment of an iron cover receiving frame device to which the present invention is applied;
FIG. 2 is a longitudinal sectional view showing a state where an iron lid is opened in the embedded housing of FIG. 1;
3 is a plan view of the buried enclosure in FIG. 1. FIG.
4 is a plan view of a receiving frame portion in FIG. 1, which is an embodiment of an iron lid receiving frame device to which the present invention is applied. FIG.
FIG. 5 is a longitudinal sectional view taken along line 5-5 in FIG.
6 is a longitudinal sectional view taken along line 6-6 in FIG.
7 is a partial cross-sectional view taken along line 7-7 (plural places) in FIG. 5 and line 7-7 (plural places) in FIG. 6;
FIG. 8 is a vertical cross-sectional view illustrating the overall configuration of an embedded housing having an iron lid receiving frame device to which the present invention is applied.
[Explanation of symbols]
1 Hollow structure (buried enclosure)
2 Receiving frame part 3 Iron cover 4 Ground (road surface)
DESCRIPTION OF SYMBOLS 10 Iron cover connection means 11 Link member 12 Link member 13 Horizontal direction connection shaft 14 Horizontal direction connection shaft 15 Horizontal direction connection shaft 50 Iron cover lock mechanism 51 Lock member 52 Handle member 53 Bar-shaped main-body part (handle member)
54 Handle part (handle member)
55 Stopper stopper (grip member)
56 Cylindrical body (locking member)
57 Flange (Lock member)
58 Engagement protrusion (locking member)
61 Concavity (cavity)
62 Reinforcing rib 63 Shelf 64 Upper opening 65 Lower opening 66 Packing 70 Fire hydrant

Claims

地中に設置される中空構造体の上端部に設けられる受け枠部により鉄蓋を嵌合支持する鉄蓋受け枠装置において、
前記受け枠部の内周部に該受け枠部のほぼ全高にわたる凹部を形成するとともに該凹部の周方向所定間隔の位置に該凹部を周方向に分割するように略上下方向に延びる補強リブを形成し、
前記補強リブの内縁部の上下方向中間部に前記受け枠部の周方向に延びる棚部を一体に形成することにより該棚部の上下に前記中空構造体の内部空間と前記凹部内の空間とを連通する上部開口部及び下部開口部を形成し、
前記受け枠部に嵌合される鉄蓋の周縁部下面を前記棚部の上面で支持し、
前記鉄蓋と前記受け枠部との間を通して外部から侵入する土砂を、前記上部開口部から前記凹部内へ導き、さらに該凹部から前記下部開口部を通して前記中空構造体の内部へ落下させ得ることを特徴とする鉄蓋受け枠装置。In the iron lid receiving frame device for fitting and supporting the iron lid by the receiving frame portion provided at the upper end portion of the hollow structure body installed in the ground,
Reinforcing ribs extending in a substantially vertical direction so as to divide the concave portions in the circumferential direction at the positions in the circumferential direction of the concave portions are formed at the inner peripheral portion of the receiving frame portion over almost the entire height of the receiving frame portion. Forming,
And space between the internal space of the hollow structure and below the shelf portion in the recess by forming a ledge extending in a circumferential direction of the receiving frame portion in a vertical direction intermediate portion of the inner edge of the reinforcing rib integrally Forming an upper opening and a lower opening that communicate with each other,
Supporting the lower surface of the peripheral edge of the iron lid fitted to the receiving frame portion on the upper surface of the shelf,
Sediment that enters from the outside through between the iron lid and the receiving frame can be guided from the upper opening into the recess, and further dropped from the recess through the lower opening into the hollow structure. An iron lid receiving frame device characterized by the above.

前記棚部の上面に、前記鉄蓋の周縁部下面と当接するゴム状弾性体のパッキンを取り付けることを特徴とする請求項１に記載の鉄蓋受け枠装置。The iron lid receiving frame device according to claim 1, wherein a rubber-like elastic packing that contacts the lower surface of the peripheral edge of the iron lid is attached to the upper surface of the shelf.