JP3894682B2

JP3894682B2 - Hinge structure for lids for underground structures

Info

Publication number: JP3894682B2
Application number: JP08947199A
Authority: JP
Inventors: 貴志河田; 和実田中
Original assignee: Hinode Ltd
Current assignee: Hinode Ltd
Priority date: 1999-03-30
Filing date: 1999-03-30
Publication date: 2007-03-22
Anticipated expiration: 2019-03-30
Also published as: JP2000282499A

Description

【０００１】
【発明の属する技術分野】
本発明は、地下構造物用蓋、より詳しくは、蓋本体とこれを支持する受枠とを連結する地下構造物用蓋の蝶番構造に関する。
【０００２】
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、地下構造施設等と地上とを通じる開口部を開閉可能に閉塞する大型鉄蓋，マンホール蓋，汚水枡蓋、電力・通信における地下施設機器や地下ケーブルなど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及びその付属機器と地上とを結ぶ開閉蓋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，量水器蓋などを総称する。
【０００３】
【従来の技術】
従来より、マンホール等の開口部に設置される地下構造物用蓋においては、その蓋本体を受枠に対して開閉可能に連結するために蓋本体と受枠との間に蝶番構造を設けたものが一般的に使用されており、例えば、実公平３−４４１号公報に記載されたマンホールの蓋の連結装置が知られている。このマンホールの蓋の連結装置は、マンホールの蓋と、受枠と、マンホールの蓋を受枠に対して連結する連結子とからなり、連結子の下端には係止突子が形成され、受枠の内側には抜け止め部が突設され、この抜け止め部には、連結子の係止突子が所定の向きでは挿通可能であるが他の向きでは抜けないようにした保持孔が形成されている。
【０００４】
【発明が解決しようとする課題】
しかしながら、前記マンホールの蓋の連結装置では、受枠に対して蓋を水平旋回させることによって蓋の開閉を行なう場合、水平旋回の途中で連結子の係止突子の向きが、抜け止め部の保持孔に対して係止突子が挿通可能な向きに一致することがあるため、連結子が抜け止め部の保持孔から外れるおそれがある。
【０００５】
また、連結子を保持孔に装着する際には、係止突子の向きを抜け止め部の保持孔に対して挿通可能な向きに一致させる必要があるため、装着が困難であり作業者に負担がかかる。
【０００６】
さらに、装着作業においては、作業者がマンホール内部に屈み込む姿勢となるため、誤ってマンホール内に落ち込むおそれがある。
【０００７】
本発明は前記の点に鑑みてなされたもので、蓋本体の開閉作業中に蝶番具が蝶番受座から外れることを防止するとともに、蝶番具と蝶番受座との着脱作業を安全かつ容易に行なうことのできる地下構造物用蓋の蝶番構造を提供することを目的としている。
【０００８】
【課題を解決するための手段】
本発明は、受枠と、前記受枠に支持される蓋本体とを開閉可能に連結する地下構造物用蓋の蝶番構造であって、下端にストッパ部を有する蝶番具を前記蓋本体の下面に揺動可能に吊り下げ、前記蝶番具と着脱可能に係合する蝶番受座を前記受枠の内周に設け、前記蝶番受座は上段部と下段部とからなり、前記上段部と前記下段部との段差面には前記ストッパ部が前記蝶番受座に対して略水平移動したときのみ挿通可能な挿通部を形成し、かつ前記蝶番受座には前記挿通部と連通し前記ストッパ部が離脱しないように保持する収納空部を形成し、閉蓋状態において前記ストッパ部は前記挿通部よりも下側に位置していることを特徴とする。
【０００９】
以上の構成において、蝶番受座の上段部と下段部との段差面に形成した挿通部は、蝶番具のストッパ部が略水平移動したときのみ挿通可能であり、閉蓋状態ではストッパ部は挿通部よりも下側に位置しているため、蓋本体を開蓋する際、蓋本体を受枠から引き上げる時にストッパ部が蝶番受座に対して略水平方向に移動したとしても、ストッパ部は挿通部に位置することがないので、ストッパ部が挿通部から抜けることはない。また、蓋本体の開閉作業中には、ストッパ部が蝶番受座から離脱する方向（蝶番受座に対して略水平方向）に力を受けることはなく、ストッパ部は常に収納空部内に保持された状態にあるため、蝶番具が蝶番受座から外れることがない。
【００１０】
一方、蝶番具を蝶番受座に着脱する時には、ストッパ部を挿通部と略同一高さに位置させた状態で蓋本体を略水平移動させることにより、ストッパ部を略水平移動させれば良いので、作業者がマンホール内部に屈み込む姿勢をとる必要がなくなり、蝶番具と蝶番受座との着脱作業を安全かつ容易に行なうことができる。
【００１１】
【発明の実施の形態】
本発明において、前記下段部の内周には、前記下段部側から前記挿通部側に向けてガイド部を形成してもよく、この場合、蝶番具のストッパ部をガイド部に載せて移動させることによってストッパ部は挿通部へ誘導されるため、蝶番受座に対する蝶番具の装着が容易となる。
【００１２】
【実施例】
以下、本発明の地下構造物用蓋の蝶番構造の第１実施例について説明する。図１は蓋本体１を受枠２に嵌合支持させた状態を示す縦断面図、図２は受枠２に蝶番受座３を取り付けた状態を示す斜視図である。また、図３は蝶番受座３を上方から見た状態を示す斜視図、図４は蝶番受座３を下方から見た状態を示す斜視図である。
【００１３】
図１に示すように、蓋本体１の下面には、蝶番具４が支持軸５により揺動可能に吊り下げられ、蝶番具４の下端には球状のストッパ部６が形成されている。受枠２の内周には、蝶番具４と着脱可能に係合する蝶番受座３が水平状態に取り付けられている。蝶番受座３は基端側に形成された支持軸７を中心にして上方にのみ一定角度だけ起伏可能である。
【００１４】
また、図３，４に示すように、蝶番受座３は、上段部４０と下段部４１とからなり、上段部４０と下段部４１との段差面８には、ストッパ部６が略水平移動したときのみ挿通可能な挿通部９が形成されている。さらに、蝶番受座３には、挿通部９と連通し、上段部４０側に位置する基端側収納空部１０と、基端側収納空部１０と連通し、下段部４１側に位置する先端側収納空部１１とが収納空部として形成されている。また、上段部４０の上部内周には張出部６０が形成されており、この張出部６０は基端側収納空部１０内に収納されたストッパ部６が上段部４０側から上方へ抜けるのを防止している。
【００１５】
下段部４１の内周には、上面が挿通部９側に向かって僅かに下り傾斜したガイド部１２が形成され、ガイド部１２の終端は挿通部９より基端側収納空部１０の方へ突出している。このガイド部１２には、蝶番具４との接触や摩擦による損傷、欠損などを防止するため面取り１２ａが施されている。また、ガイド部１２の下面には、ストッパ部６の上面と略一致する弧状曲面１３が形成されている。
【００１６】
以上の構成において、蓋本体１を受枠２に嵌合支持させた閉蓋状態（図１の状態）においては、蝶番具４は蝶番受座３の基端側収納空部１０に位置し、かつストッパ部６は挿通部９よりも下側に位置している。
【００１７】
ここで、図５〜７を参照して、蝶番具４を蝶番受座３に装着する手順について説明する。
【００１８】
まず、図５に示すように、蓋本体１の一部を受枠２の開口部分に被せるとともに、図７の実線で示すように、蝶番具４のストッパ部６を、蝶番受座３のガイド部１２の始端部分に載置する。そして、蓋本体１を蝶番受座３の方へ略水平移動すると、図７の二点鎖線で示すように、ストッパ部６はガイド部１２に載置された状態で順次移動していき、挿通部９を通過した後、基端側収納空部１０内へ収納される。この後、蓋本体１を受枠２の開口部分に完全に被せると、図１に示す閉蓋状態となる。
【００１９】
このように、蝶番具４のストッパ部６を、蝶番受座３のガイド部１２の始端部分に載置して、蓋本体１を略水平移動させるだけで、蝶番具４を蝶番受座３にスムーズに装着することができるため、作業者が受枠２内（マンホール内）に屈み込む姿勢をとる必要がなく、装着作業を容易かつ安全に行なうことができる。また、蝶番具４の寸法は、蓋本体１を地面においた状態で蝶番具４の装着ができる値となっているため、蓋本体１を地面に置いたまま略水平移動させることで装着することができ、作業者にかかる負担を軽減させるとともに、実際に施工した場合の装着作業性も良好である。
【００２０】
次に、図８〜１０を参照して、蓋本体１の開蓋動作について説明する。なお、図面では、便宜上、蓋本体１上面の凹凸模様を省略している。
【００２１】
開蓋する際には、蓋本体１のバール孔（図示せず）に開蓋バール（図示せず）の下端を挿入、係止させるとともに、蓋本体１と受枠２との嵌合状態をテコの要領で解除した後、受枠２の外方向に蓋本体１を引き上げる。このとき、蝶番具３のストッパ部６は、蝶番受座３の基端側収納空部１０から先端側収納空部１１へ移動し、ストッパ部６の上面が先端側収納空部１１の弧状曲面１３に面合する状態となる（図８）。そして、蓋本体１を開蓋バールで保持した状態のままで９０度水平旋回させると図９に示す状態となり、さらに、蓋本体１を９０度水平旋回させると、図１０に示すように、完全に開蓋した状態となる。
【００２２】
開蓋動作中、蝶番具４のストッパ部６は、先端側収納空部１１の弧状曲面１３に面合した状態で回動自在であり、蝶番受座３は支持軸７を中心にして上方に起伏可能であるため、蓋本体１の水平旋回をスムーズに行なうことができ、かつ、ストッパ部６が先端側収納空部１１から離脱するおそれもない。
【００２３】
また、万が一、蓋本体１の水平旋回中にストッパ部６が先端側収納空部１１から離脱したとしても、ストッパ部６は先端側収納空部１１と連通している基端側収納空部１０に移動することとなり、さらに、この移動の際には、ガイド部１２の終端が挿通部９より基端側収納空部１０の方へ突出しているため、ストッパ部６が基端側収納空部１０へ確実に移動し、挿通部９から抜けることを防止する。
【００２４】
閉蓋する際には、蓋本体１を再び開蓋バールで保持して１８０度水平旋回させた後、前記と逆の手順で、蓋本体１を受枠２に嵌合させればよい。閉蓋動作中においても、蝶番具４のストッパ部６は、先端側収納空部１１あるいは基端側収納空部１０の何れかに収納された状態となるので、蓋本体１をスムーズに水平旋回させることができ、ストッパ部６が離脱するおそれもない。
【００２５】
このように、本実施例の蝶番構造によれば、蓋本体１の開蓋、閉蓋いずれの作業中においても、蝶番具４が蝶番受座３から外れることがない。
【００２６】
次に、図１１，１２を参照して、蓋本体１の蝶番具４を受枠２の蝶番受座３から離脱させる動作について説明する。
【００２７】
前述した開蓋動作により、蓋本体１を閉蓋状態から１８０度水平旋回させて開蓋し、図１１に示すように蝶番具４を基端側収納空部１０内で自然垂下状態にすると、蝶番具４の寸法は、蝶番具４のストッパ部６が蝶番受座３の挿通部９と略同一高さとなるような値となっているため、ストッパ部６が挿通部９を挿通可能な姿勢となる。したがって、この状態で蓋本体１を受枠２の中心側に向かって水平移動させると、図１２に示すように、ストッパ部６は蝶番受座３のガイド部１２の終端部分に載って移動し、挿通部９を通過した後、ガイド部１２に沿って蝶番受座３の先端側へスライドしていき、蝶番受座３から離脱する。
【００２８】
このように、閉蓋状態から１８０度水平旋回させて開蓋した蓋本体１を受枠２の中心側に向かって水平移動させるだけで、蓋本体１の蝶番具４を受枠２の蝶番受座３から離脱させることができるため、蓋本体１を地面に置いた状態で蝶番具４を蝶番受座３から離脱させることができ、作業者の負担が小さく、離脱作業を容易かつ安全に行なうことができる。
【００２９】
なお、本実施例において、蓋本体１に対して蝶番具４は支持軸５を介して接続されているが、この接続手段に限定されるものではなく、球状体とこれを摺動可能に包囲する凹曲面とで構成される玉継手などを用いることもできる。
【００３０】
次に、図１３〜１５を参照して、本発明の第２実施例について説明する。図１３は蝶番受座２０を示す斜視図、図１４は蓋本体１を受枠２に嵌合させた状態を示す縦断面図、図１５は蓋本体１の開蓋動作を示す縦断面図である。
【００３１】
本実施例は、図１３に示す蝶番受座２０を用いた蝶番構造であり、蝶番受座２０以外の部分は、第１実施例の蝶番構造と同様の構造、機能を備えている。なお、第１実施例と同一部材には同一符番を付している。
【００３２】
蝶番受座２０は、前述した蝶番受座３の先端側および基端側を逆に配置した構造であり、上段部５０と下段部５１とからなり、上段部５０と下段部５１との段差面２８には、蝶番具４のストッパ部６が略水平移動したときのみ挿通可能な挿通部２９が形成されている。また、蝶番受座２０には、ストッパ部６が離脱しないように保持するため、挿通部２９と連通し上段部５０側に位置する先端側収納空部３１と、この先端側収納空部３１と連通し下段部５１側に位置する基端側収納空部５０とが収納空部として形成されている。
【００３３】
下段部５１の内周には、上面が挿通部２９に向かって僅かに下り傾斜したガイド部３２が形成され、ガイド部３２の終端は挿通部２９より先端側収納空部３１の方へ突出している。このガイド部３２には、蝶番具２４との接触や摩擦による損傷、欠損などを防止するため面取り３２ａが施されている。
【００３４】
図１４に示すように、蓋本体１を受枠２に嵌合させた閉蓋状態において、蝶番具４は蝶番受座２０の基端側収納空部３０に位置し、かつストッパ部６は挿通部２９よりも下側に位置している。したがって、第１実施例の場合と同様に、蓋本体１を水平旋回動作あるいはその他の動作をさせている場合にストッパ部６が挿通部２９から離脱することはない。
【００３５】
蝶番具４を蝶番受座２０に装着する際には、蓋本体１を受枠２に被せるとともにストッパ部６を蝶番受座２０のガイド部３２に載置した後、蓋本体１を受枠２の中心方向へ水平移動させると、ストッパ部６はガイド部３２に沿ってスライドしていき、挿通部２９を通過した後、先端側収納空部３１内へ収納される。この後、蓋本体１を蝶番受座２０の基端側へ移動させ、受枠２に嵌合させると、蝶番具４は先端側収納空部３１から基端側収納空部３０へ移動し、そこに収納される。
【００３６】
蝶番具４を蝶番受座２０から離脱させる場合は、通常の開蓋動作と同様に、蓋本体１のバール孔（図示せず）に開蓋バール（図示せず）の下端を挿入、係止させるとともに、蓋本体１と受枠２との嵌合状態をテコの要領で解除した後、受枠２の外方向に蓋本体１を引き上げる。そして、蓋本体１を閉蓋状態から１８０度水平旋回させて開蓋した後、蝶番具４を先端側収納空部３１内で自然垂下状態にすると、蝶番具４の寸法は、蝶番具４のストッパ部６が蝶番受座２０の挿通部２９と略同一高さとなるような値となっているため、ストッパ部６が挿通部２９を挿通可能な姿勢となる。
【００３７】
この状態で、蓋本体１を受枠２の外側に向かって水平移動させると、ストッパ部６は蝶番受座２０のガイド部３２の終端部分に載り、挿通部２９を通過して蝶番受座２０の基端側へスライドしていった後、蝶番受座２０から離脱する。
【００３８】
このように、第２実施例の蝶番構造によっても、第１実施例の場合と同様に、蓋本体１の開閉作業中に蝶番具４が蝶番受座２０から外れることがなく、蝶番具４と蝶番受座２０との脱着作業を安全かつ容易に行なうことができる。
【００３９】
【発明の効果】
本発明の地下構造物用蓋の蝶番構造によれば、蝶番受座の上段部と下段部との段差面に形成した挿通部は、蝶番具のストッパ部が略水平移動したときのみ挿通可能であり、閉蓋状態ではストッパ部は挿通部よりも下側に位置しているため、蓋本体を開蓋する際、蓋本体を受枠から引き上げる時にストッパ部が蝶番受座に対して略水平移動したとしても、ストッパ部は挿通部に位置することはないのでストッパ部が挿通部から抜けることはない。また、蓋本体の開閉作業中には、蝶番具のストッパ部は常に収納空部内に保持され、ストッパ部が蝶番受座から離脱する方向（蝶番受座に対して略水平方向）に力を受けることもないため、蝶番具が蝶番受座から外れることがない。一方、蝶番具を蝶番受座に着脱するときには、ストッパ部を挿通部と略同一高さに位置させた状態で、蓋本体を略水平移動させることによりストッパ部を略水平移動させれば良いので、作業者がマンホール内に屈み込む姿勢をとる必要がなく、脱着作業を安全かつ容易に行なうことができる。
【００４０】
また、蝶番受座の下段部の内周には、下段部側から挿通部側に向けてガイド部を形成してもよく、この場合、蝶番具のストッパ部をガイド部に載せて移動させることによって、ストッパ部は挿通部へ誘導されるため、蝶番受座に対する蝶番具の装着が容易となる。
【図面の簡単な説明】
【図１】本発明の地下構造物用蓋の蝶番構造の第１実施例において、閉蓋した状態を示す縦断面図である。
【図２】第１実施例において、受枠に蝶番受座を取り付けた状態を示す斜視図である。
【図３】第１実施例の地下構造物用蓋の蝶番構造を構成する蝶番受座を斜め上方から見た状態で示す斜視図である。
【図４】第１実施例の地下構造物用蓋の蝶番構造を構成する蝶番受座を斜め下方から見た状態で示す斜視図である。
【図５】蝶番具を蝶番受座に装着する状態を示す縦断面図である。
【図６】蝶番具を蝶番受座に装着する状態を示す縦断面図である。
【図７】蝶番具を蝶番受座に装着する際の蝶番具ストッパ部の移動状態を示す縦断面図である。
【図８】蓋本体を開蓋している状態を示す一部切欠斜視図である。
【図９】蓋本体を旋回開蓋している状態を示す一部切欠斜視図である。
【図１０】蓋本体を旋回開蓋した状態を示す一部切欠斜視図である。
【図１１】蝶番具を蝶番受座から離脱させている状態を示す縦断面図である。
【図１２】蝶番具を蝶番受座から離脱させる際の蝶番具の移動状態を示す縦断面図である。
【図１３】本発明の第２実施例である地下構造物用蓋の蝶番構造を構成する蝶番受座を示す斜視図である。
【図１４】第２実施例の地下構造物用蓋の蝶番構造において、蓋本体を閉蓋した状態を示す縦断面図である。
【図１５】第２実施例の地下構造物用蓋の蝶番構造において、蓋本体を開蓋している状態を示す縦断面図である。
【符号の説明】
１蓋本体
２受枠
３，２０蝶番受座
４蝶番具
５，７支持軸
６ストッパ部
８，２８段差面
９，２９挿通部
１０，３０基端側収納空部（収納空部）
１１，３１先端側収納空部（収納空部）
１２，３２ガイド部
１２ａ，３２ａ面取り
１３弧状曲面
４０，５０上段部
４１，５１下段部
６０，７０張出部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lid for an underground structure, and more particularly, to a hinge structure of a lid for an underground structure that connects a lid body and a receiving frame that supports the lid body.
[0002]
As used herein, the term “underground structure lid” refers to a large iron lid, manhole lid, sewage jar lid that can be opened and closed to open an opening through the underground structure, underground structure facility, etc. in the sewer. , Openable and closable joint gutter lids, power transmission iron lids, power distribution iron lids, underground conduits under the road surface in waterworks and gas pipes and their associated equipment and ground A fire hydrant lid, a water control valve lid, a gate valve lid, an air valve lid, a gas pipe lid, a water meter lid, etc., that function as an open / close lid that connects the two.
[0003]
[Prior art]
Conventionally, in underground structure lids installed in openings such as manholes, a hinge structure is provided between the lid body and the receiving frame to connect the lid body to the receiving frame so that it can be opened and closed. For example, a manhole cover coupling device described in Japanese Utility Model Publication No. 3-441 is known. The manhole cover connecting device comprises a manhole cover, a receiving frame, and a connector for connecting the manhole cover to the receiving frame. A locking protrusion is formed at the lower end of the connector, and the inner side of the receiving frame. Is provided with a retaining hole that allows the locking protrusion of the connector to be inserted in a predetermined direction but not to be removed in other directions. .
[0004]
[Problems to be solved by the invention]
However, in the manhole cover connecting device, when the cover is opened and closed by horizontally swiveling with respect to the receiving frame, the direction of the locking protrusions of the connector during the horizontal swiveling is maintained by the retaining portion. Since the direction in which the locking protrusion can be inserted into the hole may coincide, the connector may come off from the holding hole of the retaining portion.
[0005]
In addition, when attaching the connector to the holding hole, it is necessary to make the direction of the locking protrusion coincide with the direction that can be inserted into the holding hole of the retaining portion. It takes a burden.
[0006]
Further, in the mounting work, the worker is bent into the manhole, and thus may fall into the manhole by mistake.
[0007]
The present invention has been made in view of the above points, and prevents the hinge from being detached from the hinge seat during the opening and closing operation of the lid body, and allows the hinge tool and the hinge seat to be attached and detached safely and easily. An object of the present invention is to provide a hinge structure for a lid for an underground structure that can be performed.
[0008]
[Means for Solving the Problems]
The present invention is a hinge structure for a cover for an underground structure that connects a receiving frame and a lid body supported by the receiving frame so as to be openable and closable, and swings a hinge having a stopper at the lower end to the lower surface of the lid body. A hinge receiving seat that is movably suspended and detachably engages with the hinge is provided on the inner periphery of the receiving frame, the hinge receiving seat comprising an upper step portion and a lower step portion, and the upper step portion and the lower step portion, An insertion portion that can be inserted only when the stopper portion moves substantially horizontally with respect to the hinge receiving seat is formed on the step surface, and the stopper receiving portion communicates with the insertion portion and the stopper portion does not come off. The holding empty portion is formed as described above, and the stopper portion is positioned below the insertion portion in the closed state.
[0009]
In the above configuration, the insertion portion formed on the step surface between the upper and lower steps of the hinge receiving seat can be inserted only when the stopper portion of the hinge moves substantially horizontally, and the stopper portion is inserted in the closed state. When the lid body is opened, even if the stopper part moves in a substantially horizontal direction with respect to the hinge seat when the lid body is lifted from the receiving frame, the stopper part is not inserted. Therefore, the stopper portion does not come out of the insertion portion. In addition, during the opening and closing operation of the lid body, the stopper is not subjected to force in the direction in which the stopper is detached from the hinge receiving seat (substantially horizontal to the hinge receiving seat), and the stopper is always held in the storage empty space. The hinge is not detached from the hinge seat.
[0010]
On the other hand, when attaching / detaching the hinge to / from the hinge receiving seat, the stopper portion may be moved substantially horizontally by moving the lid body substantially horizontally with the stopper portion positioned at substantially the same height as the insertion portion. This eliminates the need for the operator to bend into the manhole and allows the hinge tool and the hinge seat to be attached and detached safely and easily.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, a guide portion may be formed on the inner periphery of the lower step portion from the lower step portion side toward the insertion portion side. In this case, the stopper portion of the hinge is placed on the guide portion and moved. Accordingly, the stopper portion is guided to the insertion portion, so that the hinge can be easily attached to the hinge receiving seat.
[0012]
【Example】
Hereinafter, a first embodiment of the hinge structure for a lid for an underground structure according to the present invention will be described. FIG. 1 is a longitudinal sectional view showing a state in which the lid body 1 is fitted and supported on the receiving frame 2, and FIG. 2 is a perspective view showing a state in which a hinge seat 3 is attached to the receiving frame 2. 3 is a perspective view showing a state in which the hinge receiving seat 3 is viewed from above, and FIG. 4 is a perspective view showing a state in which the hinge receiving seat 3 is viewed from below.
[0013]
As shown in FIG. 1, a hinge 4 is suspended from a lower surface of the lid main body 1 by a support shaft 5 so as to be swingable, and a spherical stopper portion 6 is formed at the lower end of the hinge 4. A hinge receiving seat 3 that is detachably engaged with the hinge 4 is attached to the inner periphery of the receiving frame 2 in a horizontal state. The hinge seat 3 can be raised and lowered by a certain angle only about the support shaft 7 formed on the base end side.
[0014]
As shown in FIGS. 3 and 4, the hinge seat 3 includes an upper step portion 40 and a lower step portion 41, and the stopper portion 6 moves substantially horizontally on the step surface 8 between the upper step portion 40 and the lower step portion 41. The insertion part 9 which can be inserted only when it does is formed. Further, the hinge receiving seat 3 communicates with the insertion portion 9 and communicates with the proximal end side accommodation empty portion 10 located on the upper step portion 40 side and the proximal end side accommodation empty portion 10 and located on the lower step portion 41 side. The distal end side storage space 11 is formed as a storage space. Further, an overhang 60 is formed on the upper inner periphery of the upper stage 40, and the overhang 60 has a stopper portion 6 accommodated in the base-end side storage cavity 10 upward from the upper stage 40 side. It prevents it from coming out.
[0015]
A guide portion 12 whose upper surface is slightly inclined downward toward the insertion portion 9 side is formed on the inner periphery of the lower step portion 41, and the end of the guide portion 12 is directed from the insertion portion 9 toward the proximal-side storage empty portion 10. It protrudes. The guide portion 12 is provided with a chamfer 12a to prevent contact with the hinge 4 or damage or loss due to friction. Further, an arcuate curved surface 13 that substantially coincides with the upper surface of the stopper portion 6 is formed on the lower surface of the guide portion 12.
[0016]
In the above configuration, in the closed state in which the lid body 1 is fitted and supported on the receiving frame 2 (the state shown in FIG. 1), the hinge 4 is located in the base-end side storage empty portion 10 of the hinge receiving seat 3, and The stopper part 6 is located below the insertion part 9.
[0017]
Here, with reference to FIGS. 5-7, the procedure which mounts the hinge tool 4 to the hinge seat 3 is demonstrated.
[0018]
First, as shown in FIG. 5, a part of the lid main body 1 is covered with the opening portion of the receiving frame 2, and the stopper portion 6 of the hinge 4 is attached to the guide portion of the hinge receiving seat 3 as shown by the solid line in FIG. 7. 12 is placed on the starting end portion. Then, when the lid body 1 is moved substantially horizontally toward the hinge seat 3, as shown by the two-dot chain line in FIG. 7, the stopper portion 6 sequentially moves while being placed on the guide portion 12. After passing through the part 9, the base end side storage space 10 is stored. After that, when the lid body 1 is completely covered with the opening portion of the receiving frame 2, the lid is closed as shown in FIG.
[0019]
Thus, the stopper 4 of the hinge 4 is placed on the starting end portion of the guide 12 of the hinge receiving seat 3, and the hinge 4 is moved to the hinge receiving 3 only by moving the lid body 1 substantially horizontally. Since it can be mounted smoothly, it is not necessary for the operator to bend in the receiving frame 2 (in the manhole), and the mounting operation can be performed easily and safely. Moreover, since the dimension of the hinge 4 is a value that allows the hinge 4 to be mounted while the lid body 1 is on the ground, the hinge body 4 is mounted by moving the lid body 1 substantially horizontally while being placed on the ground. In addition to reducing the burden on the worker, the mounting workability when actually constructed is also good.
[0020]
Next, the lid opening operation of the lid body 1 will be described with reference to FIGS. In the drawing, the concave and convex pattern on the upper surface of the lid body 1 is omitted for convenience.
[0021]
When opening the lid, the lower end of the opening bar (not shown) is inserted and locked in the bar hole (not shown) of the lid body 1 and the fitting state between the lid body 1 and the receiving frame 2 is After the release in the manner described above, the lid body 1 is pulled up outward of the receiving frame 2. At this time, the stopper portion 6 of the hinge 3 moves from the proximal-side storage empty portion 10 of the hinge receiving seat 3 to the distal-side storage empty portion 11, and the upper surface of the stopper portion 6 is an arcuate curved surface of the distal-end-side storage empty portion 11. 13 is met (FIG. 8). Then, when the lid body 1 is horizontally rotated 90 degrees with the lid bar held, the state shown in FIG. 9 is obtained. Further, when the lid body 1 is horizontally rotated 90 degrees, as shown in FIG. The lid is opened.
[0022]
During the opening operation, the stopper portion 6 of the hinge 4 is rotatable in a state where it faces the arcuate curved surface 13 of the distal-side storage hollow portion 11, and the hinge receiving seat 3 is moved upward with the support shaft 7 as a center. Since it can be raised and lowered, the lid main body 1 can be smoothly turned horizontally, and there is no possibility that the stopper portion 6 is detached from the distal-end-side storage empty portion 11.
[0023]
Further, even if the stopper portion 6 is detached from the distal-side storage space 11 during the horizontal turning of the lid body 1, the stopper portion 6 communicates with the distal-side storage space 11 and the proximal-side storage space 10. Further, at the time of this movement, since the terminal end of the guide portion 12 protrudes from the insertion portion 9 toward the base end side storage space portion 10, the stopper portion 6 is in the base end side storage space portion. It moves to 10 reliably and prevents coming off from the insertion part 9.
[0024]
When closing the lid, the lid main body 1 is held again by the opening bar and rotated 180 degrees horizontally, and then the lid main body 1 is fitted to the receiving frame 2 in the reverse procedure. Even during the lid closing operation, the stopper portion 6 of the hinge 4 is in the state of being housed in either the distal end side accommodating hollow portion 11 or the proximal end side accommodating hollow portion 10, so that the lid body 1 can be smoothly turned horizontally. There is no possibility that the stopper portion 6 is detached.
[0025]
Thus, according to the hinge structure of the present embodiment, the hinge 4 is not detached from the hinge receiving seat 3 during the operation of opening and closing the lid body 1.
[0026]
Next, with reference to FIGS. 11 and 12, an operation for separating the hinge 4 of the lid body 1 from the hinge seat 3 of the receiving frame 2 will be described.
[0027]
By the lid opening operation described above, the lid body 1 is horizontally rotated 180 degrees from the closed state to open the lid, and as shown in FIG. The dimensions of the hinge 4 are such that the stopper portion 6 of the hinge 4 has a value that is substantially the same height as the insertion portion 9 of the hinge receiving seat 3, so that the stopper portion 6 can be inserted through the insertion portion 9. It becomes. Therefore, when the lid body 1 is horizontally moved toward the center side of the receiving frame 2 in this state, the stopper portion 6 moves on the terminal portion of the guide portion 12 of the hinge seat 3 as shown in FIG. After passing through the insertion part 9, it slides along the guide part 12 toward the distal end side of the hinge receiving seat 3, and is detached from the hinge receiving seat 3.
[0028]
As described above, the hinge body 4 of the lid body 1 can be moved to the center side of the receiving frame 2 by simply horizontally moving the lid body 1 that has been opened by turning 180 degrees horizontally from the closed state. Therefore, the hinge 4 can be detached from the hinge receiving seat 3 with the lid body 1 placed on the ground, and the burden on the operator is small, so that the removal work can be performed easily and safely. it can.
[0029]
In this embodiment, the hinge 4 is connected to the lid body 1 via the support shaft 5, but is not limited to this connecting means, and surrounds the spherical body and the slidable body. It is also possible to use a ball joint composed of a concave curved surface.
[0030]
Next, a second embodiment of the present invention will be described with reference to FIGS. 13 is a perspective view showing the hinge seat 20, FIG. 14 is a longitudinal sectional view showing a state in which the lid main body 1 is fitted to the receiving frame 2, and FIG. 15 is a longitudinal sectional view showing a lid opening operation of the lid main body 1. .
[0031]
The present embodiment is a hinge structure using the hinge seat 20 shown in FIG. 13, and the portions other than the hinge seat 20 have the same structure and function as the hinge structure of the first embodiment. The same members as those in the first embodiment are denoted by the same reference numerals.
[0032]
The hinge receiving seat 20 has a structure in which the distal end side and the proximal end side of the hinge receiving seat 3 described above are arranged in reverse, and includes an upper step portion 50 and a lower step portion 51, and a step surface between the upper step portion 50 and the lower step portion 51. 28 is formed with an insertion portion 29 that can be inserted only when the stopper portion 6 of the hinge 4 is moved substantially horizontally. Further, in order to hold the stopper portion 6 so as not to be detached, the hinge receiving seat 20 communicates with the insertion portion 29, and includes a distal end side storage empty portion 31 positioned on the upper step portion 50 side, and the front end side storage empty portion 31. A base end side storage space 50 located on the communication lower step portion 51 side is formed as a storage space.
[0033]
A guide portion 32 whose upper surface is slightly inclined downward toward the insertion portion 29 is formed on the inner periphery of the lower step portion 51, and the end of the guide portion 32 protrudes from the insertion portion 29 toward the distal-side storage empty portion 31. Yes. The guide portion 32 is provided with a chamfer 32a in order to prevent contact with the hinge 24, damage due to friction, loss, and the like.
[0034]
As shown in FIG. 14, in the closed state in which the lid body 1 is fitted to the receiving frame 2, the hinge 4 is positioned in the proximal-end-side storage empty portion 30 of the hinge receiving seat 20, and the stopper portion 6 is the insertion portion. It is located below 29. Therefore, as in the case of the first embodiment, the stopper portion 6 does not separate from the insertion portion 29 when the lid body 1 is performing a horizontal turning operation or other operations.
[0035]
When the hinge 4 is mounted on the hinge receiving seat 20, the lid main body 1 is put on the receiving frame 2 and the stopper portion 6 is placed on the guide portion 32 of the hinge receiving seat 20, and then the lid main body 1 is placed at the center of the receiving frame 2. When horizontally moved in the direction, the stopper portion 6 slides along the guide portion 32, passes through the insertion portion 29, and is then stored in the distal end side storage empty portion 31. Thereafter, when the lid main body 1 is moved to the proximal end side of the hinge receiving seat 20 and fitted to the receiving frame 2, the hinge 4 is moved from the distal end side accommodating hollow portion 31 to the proximal end side accommodating hollow portion 30, It is stored in.
[0036]
When the hinge 4 is detached from the hinge receiving seat 20, the lower end of the opening bar (not shown) is inserted into the bar hole (not shown) of the lid body 1 and locked in the same manner as the normal opening operation. At the same time, after releasing the fitting state of the lid body 1 and the receiving frame 2 in the manner of a lever, the lid body 1 is pulled up in the outward direction of the receiving frame 2. Then, after the lid body 1 is horizontally rotated 180 degrees from the closed state to open the lid, the hinge 4 is naturally suspended in the distal end-side storage space 31, and the dimensions of the hinge 4 are as follows. Since the stopper portion 6 has a value that is substantially the same height as the insertion portion 29 of the hinge receiving seat 20, the stopper portion 6 can be inserted through the insertion portion 29.
[0037]
In this state, when the lid body 1 is horizontally moved toward the outside of the receiving frame 2, the stopper portion 6 is placed on the terminal portion of the guide portion 32 of the hinge receiving seat 20, passes through the insertion portion 29, and the hinge receiving seat 20. After sliding to the base end side, it is detached from the hinge seat 20.
[0038]
As described above, according to the hinge structure of the second embodiment, as in the case of the first embodiment, the hinge 4 is not detached from the hinge receiving seat 20 during the opening / closing operation of the lid body 1, and the hinge 4 The attachment / detachment work with the hinge seat 20 can be performed safely and easily.
[0039]
【The invention's effect】
According to the hinge structure of the lid for an underground structure of the present invention, the insertion portion formed on the step surface between the upper step portion and the lower step portion of the hinge seat can be inserted only when the stopper portion of the hinge tool moves substantially horizontally. Yes, since the stopper part is located below the insertion part in the closed state, when the lid body is opened, the stopper part moves substantially horizontally with respect to the hinge seat when the lid body is pulled up from the receiving frame. However, since the stopper part is not located in the insertion part, the stopper part does not come out of the insertion part. During the opening and closing operation of the lid body, the stopper portion of the hinge is always held in the housing empty portion, and receives a force in the direction in which the stopper portion is detached from the hinge receiving seat (substantially horizontal to the hinge receiving seat). In no case, the hinge is not detached from the hinge seat. On the other hand, when attaching / detaching the hinge to / from the hinge receiving seat, the stopper portion may be moved substantially horizontally by moving the lid body substantially horizontally with the stopper portion positioned substantially at the same height as the insertion portion. Therefore, it is not necessary for the operator to bend into the manhole, and the detaching operation can be performed safely and easily.
[0040]
Further, a guide portion may be formed on the inner periphery of the lower step portion of the hinge receiving seat from the lower step portion side toward the insertion portion side. In this case, the stopper portion of the hinge tool is placed on the guide portion and moved. Thus, since the stopper portion is guided to the insertion portion, it is easy to attach the hinge to the hinge receiving seat.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a closed state in a first embodiment of a hinge structure for a lid for an underground structure according to the present invention.
FIG. 2 is a perspective view showing a state in which a hinge seat is attached to the receiving frame in the first embodiment.
FIG. 3 is a perspective view showing a hinge receiving seat constituting the hinge structure of the lid for an underground structure according to the first embodiment as viewed obliquely from above.
FIG. 4 is a perspective view showing a hinge receiving seat constituting the hinge structure of the lid for an underground structure according to the first embodiment as viewed obliquely from below.
FIG. 5 is a longitudinal sectional view showing a state in which a hinge is mounted on a hinge seat.
FIG. 6 is a longitudinal sectional view showing a state in which a hinge is mounted on a hinge seat.
FIG. 7 is a longitudinal sectional view showing a moving state of a hinge stopper portion when the hinge is attached to the hinge seat.
FIG. 8 is a partially cutaway perspective view showing a state in which the lid body is opened.
FIG. 9 is a partially cutaway perspective view showing a state in which the lid body is pivoted open.
FIG. 10 is a partially cutaway perspective view showing a state in which the lid body is turned open.
FIG. 11 is a longitudinal sectional view showing a state in which the hinge tool is detached from the hinge receiving seat.
FIG. 12 is a longitudinal sectional view showing a moving state of the hinge when the hinge is detached from the hinge receiving seat.
FIG. 13 is a perspective view showing a hinge seat that constitutes the hinge structure of the lid for an underground structure according to the second embodiment of the present invention.
FIG. 14 is a longitudinal sectional view showing a state in which the lid body is closed in the hinge structure of the lid for an underground structure according to the second embodiment.
FIG. 15 is a longitudinal sectional view showing a state in which the lid body is opened in the hinge structure of the lid for an underground structure according to the second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lid main body 2 Receiving frame 3,20 Hinge receiving seat 4 Hinge tools 5,7 Support shaft 6 Stopper part 8,28 Step surface 9,29 Insertion part 10,30 Base end side accommodation empty part (accommodation empty part)
11, 31 Tip side storage space (storage space)
12, 32 Guide portion 12a, 32a Chamfer 13 Arc-shaped curved surface 40, 50 Upper step portion 41, 51 Lower step portion 60, 70 Overhang portion

Claims

受枠と、前記受枠に支持される蓋本体とを開閉可能に連結する地下構造物用蓋の蝶番構造であって、下端にストッパ部を有する蝶番具を前記蓋本体の下面に揺動可能に吊り下げ、前記蝶番具と着脱可能に係合する蝶番受座を前記受枠の内周に設け、前記蝶番受座は上段部と下段部とからなり、前記上段部と前記下段部との段差面には前記ストッパ部が前記蝶番受座に対して略水平移動したときのみ挿通可能な挿通部を形成し、かつ前記蝶番受座には前記挿通部と連通し前記ストッパ部が離脱しないように保持する収納空部を形成し、閉蓋状態において前記ストッパ部は前記挿通部よりも下側に位置していることを特徴とする地下構造物用蓋の蝶番構造。A hinge structure for a lid for an underground structure that connects a receiving frame and a lid main body supported by the receiving frame in an openable and closable manner, and a hinge having a stopper at the lower end is swingably suspended from the lower surface of the lid main body A hinge receiving seat that is detachably engaged with the hinge is provided on the inner periphery of the receiving frame, and the hinge receiving seat comprises an upper step portion and a lower step portion, and is provided on a step surface between the upper step portion and the lower step portion. Forms an insertion portion that can be inserted only when the stopper portion moves substantially horizontally with respect to the hinge receiving seat, and the hinge receiving seat communicates with the insertion portion and holds the stopper portion so as not to be detached. A hinge structure for a lid for an underground structure, wherein a storage empty portion is formed, and the stopper portion is positioned below the insertion portion in a closed state.

前記下段部の内周には、前記下段部側から前記挿通部側に向けてガイド部を形成した請求項１記載の地下構造物用蓋の蝶番構造。The hinge structure for a lid for an underground structure according to claim 1, wherein a guide portion is formed on an inner periphery of the lower step portion from the lower step portion side toward the insertion portion side.