JP3605727B2 - Opening / closing switch for lid for ground-filled room and method for opening lid using the same - Google Patents

Description

【０００１】
【発明の属する技術分野】
本発明は地表埋設室用蓋の開閉器及び開放方法に関するものであり、より詳しくは、マンホール、桝、弁（栓）室等、各種の地表埋設室の上面開口を閉塞せる蓋を開放するための開閉器及びこれを用いた蓋の開放方法に関するものである。
【０００２】
【従来の技術】
従来、地表埋設室用蓋の開閉器としては、例えば図６（イ）及び（ロ）に示す如く、鋼製で断面円形の真直ぐな棒状本体２ａの先端部を舌片状に成形してバール片３ａとなすものがある。
この従来の開閉器１ａにあっては、例えば図７（イ）乃至（ハ）に示す如く、弁室等の各種地表埋設室１１の上面開口を囲繞する蓋受枠１２に支持された蓋１３の周縁に設けられたバール孔１４にそのバール片３ａを挿入する。而してバール片３ａの上面をバール孔１４に係止し、蓋受枠１２の内周面の上部隅角部１８にバール片３ａの下面を当接するとともに、該当接部を支点として棒状本体２ａの上部末端側を下方に回動させ、梃子作用により閉塞せる蓋１３を開放するものである。
【０００３】
【発明が解決しようとする課題】
しかしながら、かかる従来の開閉器１ａは、単に真直ぐな棒状本体２ａの先端部を舌片状のバール片３ａに成形しているにすぎないために、蓋１３の開放時において、バール片３ａを蓋１３のバール孔１４に挿入した際には、図７（ハ）に示す如く、バール孔１４内でバール片３ａの位置が固定されずに矢印方向に動きやすく、安定した状態で棒状本体２ａを回動操作しがたい問題があった。
【０００４】
又、図７（イ）に示す如き蓋受枠１２との間に少許の隙間を存して嵌め込まれた蓋１３を開放するにはそれ程支障はないが、地表埋設室１１上を通行する車両等により蓋受枠１２と蓋１３との間に生じたガタツキに起因する騒音発生を防止すべく、蓋１３の外周面と蓋受枠１２の内周面とが滑らかに加工されて両者間に隙間がなく、例えば図７（ロ）及び（ハ）に示す如く、蓋１３が蓋受枠１２に密接して嵌め込まれている場合には、かかる従来の開閉器１ａでは、密嵌せる蓋１３の開放に手間がかかったり、真直ぐな棒状本体２ａが曲がったりする問題点もあった。
更に、何れの場合も、図７（イ）及び（ロ）に示す如く、必ず蓋受枠１２の内周面の上部隅角部１８にバール片３ａの下面を当接し、該当接部を支点として回動操作するために、バール片３ａの下面や上部隅角部１８が局部的に摩耗、損傷し、該所を支点とした梃子作用が利きにくくなる問題点もあった。
【０００５】
本発明はかかる従来の問題点に鑑みなされたもので、密嵌せる蓋１３の開放時に、安定した状態で且つ容易に回動操作できるとともに、回動操作時の棒状本体２の変形を防止した地表埋設室用蓋の開閉器及びこれを用いた蓋の開放方法を提供することを目的としている。
【０００６】
【課題を解決するための手段】
上記課題を解決するため、本発明の地表埋設室用蓋の開閉器は、棒状本体２の先端部に、蓋受枠１２に支持された蓋１３の周縁のバール孔１４に挿入される偏平状のバール片３を連設するとともに、該バール片３の上側に、前記バール孔１４の開口部に追設された凹陥部１５に嵌合される膨出部４を設け、バール片３の下側の付根部近傍に、前記蓋受枠１２の上面に当接されて回動支点をなす支持座５を設けてなることを特徴とする。
【０００７】
かかる本発明の地表埋設室用蓋の開閉器によれば、密嵌せる蓋１３の開放時に、バール片３を蓋受枠１２に支持された蓋１３の周縁のバール孔１４に挿入すると、バール片３下側の付根部近傍にある支持座５が蓋受枠１２の上面に当接して棒状本体２をその上面から浮上させて支持し、又、これに加えて前記バール孔１４の開口部に凹陥部１５が追設されている場合には、該凹陥部１５にバール片３上側の膨出部４が嵌合して、バール片３がバール孔１４内で遊ぶことなく位置決めされる。
従って、前記支持座５或いはこれと膨出部４との作用により、開閉器１をバール孔１４へ安定状態で嵌挿できるとともに、支持座５を支点として棒状本体２の上部末端を少ない力で下方へスムーズに回動操作できると同時に、梃子作用により、バール孔１４に係止するバール片３の先端が上動して蓋１３を容易に開放することができる。又、回動支点となる支持座５を蓋受枠１２の上面に当接することで棒状本体２と蓋受枠１２との接触を回避でき、開閉器１自体や蓋受枠１２の内周面の上部隅角部１８が摩耗、損傷するようなことがない。
【０００８】
又、本発明の地表埋設室用蓋の開放方法は、棒状本体２の先端部に偏平状のバール片３を連設するとともに、該バール片３の上側に膨出部４を設け、バール片３の下側の付根部近傍に支持座５を設けて開閉器１を形成し、蓋受枠１２に支持された蓋１３の周縁のバール孔１４に前記開閉器１のバール片３を挿入するとともに、膨出部４を前記バール孔１４の開口部に追設された凹陥部１５に嵌合し、支持座５を前記蓋受枠１２の上面に当接し、該支持座を支点として棒状本体２を回動操作するものである。
かかる本発明によれば、密嵌せる蓋１３の開放時に、バール片３上側の膨出部４が蓋１３のバール孔１４の凹陥部１５に嵌合することにより、バール片３がバール孔１４内で遊ぶことなく確実に位置決めされるとともに、支持座５が蓋受枠１２の上面に当接して棒状本体２をその上面から浮上させて支持する。従って、凹陥部１５を追設したバール孔１４に開閉器１をより一層安定状態で嵌挿でき、且つ支持座５を支点として棒状本体２の上部末端側を下向き方向へ回動させる操作がスムーズに行えると同時に、梃子作用によりバール孔１４に係止するバール片３の先端が上動して、蓋１３を容易に浮上させて開放することができる。
【０００９】
【発明の実施の形態】
以下、図面を参照しながら本発明の実施の形態について説明する。
図１（イ）及び（ロ）は本発明の一実施形態に係る開閉器を示し、１は本発明の開閉器であって、断面円形の棒状本体２の先端部を偏平させるとともにその先端を上向き状に曲折して略逆へ字形をなすバール片３となし、該バール片３の上側で略逆へ字形の曲折部に膨出部４を設け、バール片３の下側の付根部近傍、即ち、その下側で前記膨出部４よりバール片３と反対側末端方向に少しずれた位置に棒状本体２と交差する短円柱状の支持座５を設けてなる。
又、上記支持座５からバール片３と反対側末端方向に離隔した位置に屈曲部６を設け、棒状本体２を略へ字形に曲折するとともに、その末端２′に舌片状のバール片８を一体的に設け、前記屈曲部６の略へ字形の狭角側、即ち、棒状本体２の下側で支持座５から末端２′方向の長さ方向に沿ってリブ状の補強材７を設けてなる。
尚、当該開閉器１は、金属製、樹脂製等、所望の性能に応じて任意の材質から構成されてなるものである。
【００１０】
次に、かかる開閉器１の使用例を図１（ハ）、図２（イ）乃至（ハ）に基づいて説明する。
まず、棒状本体２の末端２′側を把持し、弁室等の各種地表埋設室１１の上面開口を囲繞する蓋受枠１２に支持された蓋１３の周縁に設けたバール孔１４にそのバール片３を挿入するとともに、膨出部４をバール孔１４に追設された凹陥部１５に嵌合させ、支持座５を蓋受枠１２の上面に当接する。次いで前記支持座５を支点として棒状本体２の末端２′側を下方に回動させ梃子作用を働かせることで、バール孔１４に係止するバール片３の先端が上動して蓋１３が浮上し開放される。
【００１１】
前記蓋１３の開放時に、バール片３上側の膨出部４が蓋１３のバール孔１４の凹陥部１５に嵌合されることで、バール片３がバール孔１４内で遊ぶことなく位置決めされるとともに、棒状本体２が略へ字形に曲折していることと相まって、棒状本体２の自重によりバール片３の先端がバール孔１４に自動的に係止し、又、支持座５が蓋受枠１２の上面を押圧する如く、曲折する棒状本体２の末端２′側が自然に回動方向（下向き）へ向け屈曲して緩傾斜状態となる。そのために、開閉器１を安定状態で装着でき、且つ緩傾斜状態をなす棒状本体２の末端２′側に、梃子作用を奏じさせる下向きの力を作用させやすくなり、容易に回動操作させて蓋１３を開放できるものである。又、その時、屈曲部６の下側に添着した補強材７が、棒状本体２の断面係数を増大させ、その弾性変形を防止して梃子作用をよく利かせることで蓋１３の開放がより速やかに行えるものである。
【００１２】
尚、前記蓋１３の周縁のバール孔１４は、蓋１３の上面及び蓋受枠１２の内周面側に開口し、図２（ニ）に示す如く、蓋受枠１２の上部隅角部１８との対向部略中央に、略半円形状の凹陥部１５が追設されており、一方、前記バール片３の膨出部４は、図２（ロ）に示す如く、前記略半円形状の凹陥部１５に適合すべく略かまぼこ形状となされているが、その形状は自由であり、該膨出部４と凹陥部１５が凹凸嵌合可能となるべく夫々相応する形状になされていればよい。
又、棒状本体２の末端２′にある舌片状のバール片８の使用例について説明すると、前記バール片３による蓋１３の解放前に密嵌せる蓋１３を予め開放しやすい状態にしておくために、蓋１３の周縁に設けた他のバール孔にバール片８を挿入して抉ることにより、蓋１３と蓋受枠１２との嵌合を緩めたり、その他の場所で通常のバールとして兼用的な使用が行える。
【００１３】
図３（イ）乃至（ハ）は本発明の他実施形態に係る開閉器を示し、本発明の開閉器１は上記図１に示すものの変形実施例であって、棒状本体２と交差する支持座５が長尺棒状の把手状をなし、棒状本体２をより長尺となしてその末端２′に角筒形で袋状をなすキャップ体９を一体的に設けた点で異なる他は上記図１に示すものと同構造をなす。
【００１４】
かかる開閉器１の使用例において、バール片３による蓋１３の開放については、上記図１（ハ）、図２（イ）乃至（ハ）に示す使用例と同様であるためこれを援用するが、当該開閉器１の支持座５は長尺棒状に形成され蓋受枠１２の上面との接触長さが増加してバール孔１４への装着時及び梃子運動時（図１（ハ）及び図２（イ）、（ハ）時）の安定性が更に良くなるという点で優位性を有する。
次に、棒状本体２の末端２′にあるキャップ体９の使用例を図３（ニ）に基づいて説明する。
即ち、バール片３による蓋１３の開放後、弁室等の各種地表埋設室１１及び地中埋設室１１′内に配置された埋設機器１６（例えて消火栓、仕切弁等）の弁開閉螺子１７を回転させてその弁等を開閉すべく、蓋受枠１２の上面開口から棒状本体２を把持して開閉器１を差し入れ、その末端２′にあるキャップ体９を埋設機器１６から垂設せる弁開閉螺子１７に嵌挿させるとともに、その上位で水平状をなして把手となる支持座５を回転させることにより、棒状本体２及びキャップ体９を介して弁開閉螺子１７を回転させるものである。
尚、前記角筒形をなすキャップ体９の形状は自由であり、該キャップ体９を嵌挿する弁開閉螺子１７の形状に相応して、該弁開閉螺子１７を回転させられるものであればよい。
【００１５】
図４（イ）乃至（ホ）は本発明の更に他実施形態に係る開閉器を示し、本発明の開閉器１は、略へ字形の屈曲部６を有しない真直ぐな棒状本体２の先端部に舌片状のバール片３を成形し、その上側に膨出部４を、又、その下側の付根部近傍に、一端部が第二バール部１０としての舌片状のバール片１０ａ、他端部が第二バール部１０としてのＴ字片１０ｂとなされた長棒状の支持座５を棒状本体２と交差して設けるとともに、該支持座５から末端２′方向の長さ方向に沿ってリブ状の補強材７を設け、且つ末端２′にキャップ体９を一体的に設けてなる。
【００１６】
かかる開閉器１では、棒状本体２を略へ字形に曲折する屈曲部６がないために、屈曲部６を有する前記図１及び図３に示す開閉器１に比べると、バール片３をバール孔１４に挿入した際の棒状本体２がやや起立状となり回動方向に対する傾斜度合いが少なくなるものの、バール片３による蓋１３の開放使用例については、前記図２（イ）乃至（ハ）に示す使用例と同様であるためこれを援用し、又、把手をなす支持座５及び末端２′にあるキャップ体９の使用例は、前記図３（ニ）に示す使用例と同様であるためこれを援用する。
而して、支持座５の一端部にある第二バール部１０としてのバール片１０ａの使用例は、図４（ヘ）に示すように、棒状本体２と該棒状本体２と交差する長棒状の支持座５とが鶴嘴状を呈するので、支持座５の一端部にあるバール片１０ａをバール孔１４に挿入し、棒状本体２の末端２′側を上動させることでバール孔１４を抉ることができ、バール片３による蓋１３の解放前に、蓋受枠１２との密嵌状態を緩めたり、その他の場所で通常のバールや鶴嘴として兼用的な使用が行える。
又、支持座５の他端部にあるＴ字片１０ｂは、図４（ロ）及び（ホ）に示すように、端部に向かってその径が漸次小さくなされた支持座５を中心軸としてその両側に相対して板片が外突されることで、平面視略逆Ｔ字型を呈してなる。而して、その使用に際しては、長棒状の支持座５を略垂直状にして、該Ｔ字片１０ｂを図４（へ）及び（ト）に示す如き蓋１３に穿設された係止孔２０に沿わせて挿入し（図４（ホ）に破線で示す）、支持座５を軸として該支持座５と共にＴ字片１０ｂを上記係止孔２０内で適宜角度回転させて蓋１３の裏面側に係止することができ、バール片３による蓋１３の開放後に、棒状本体２や支持座５を把持して蓋１３を持ち上げ安全に移動させることができる。
【００１７】
尚、上記各実施形態において、棒状本体２については、その断面形状は円形の他、だ円形、半円形、三角形、方形、多角形等適宜形状としてもよく、又、中実或いは中空であってもよく、その長さは蓋１３の大きさや重量、或いは地表埋設室１１や地中埋設室１１′内の埋設機器１６の埋設深さ等によりその使用目的に応じた適宜長さに設計されればよい。又、バール片３については、その形状、寸法は蓋１３のバール孔１４に適合すればよく、その先端部に略逆へ字形の曲折部を設ければ、蓋１３の開放時に該所がバール孔１４に係止しやすく好ましいが、かかる略逆へ字形の曲折角度はとくに限定されず、例えて図４に示すような舌片直状のバール片３であってもよい。
又、支持座５についても、円柱状以外に、だ円柱状、半円柱状、三角柱状、四角柱状、多角柱状等、梃子の支点をなすべく適宜形状となされ、棒状本体２と交差すべく適宜手段により該棒状本体２と一体化されればよく、又、長棒状をなす場合には、その端部に必要に応じて第二バール部１０が設けられればよい。又、略へ字状をなす屈曲部６の曲折角度についても、棒状本体２の長さや回動操作性等により適宜決められればよい。
【００１８】
更に、補強材７は、図５（イ）及び（ロ）に示す如く、屈曲部６を有する棒状本体２の上側で膨出部４と連設してバール片３と反対側末端方向の長さ方向に沿ってリブ状に設けられてもよいし、図５（ハ）乃至（ホ）に示す如く、棒状本体２の上側で膨出部４自体がそのままバール片３と反対側末端方向の長さ方向に沿って延長されて設けられてもよく、これらの場合は、支持座５から先にあるバール片３自体の変形をも防止できて好ましいし、或いは棒状本体２の上側と下側の両側に長さ方向に沿って設けられれば、一層強固な開閉器となすことができる。更に又、その形状もバール片３、屈曲部６や棒状本体２を補強できればよく、適宜形状のものが棒状本体２の長さ方向に沿って適宜手段により一体化されればよいもので、上記各実施形態のものに限定するものではない。
又、第二バール部１０及びバール片８についても、通常のバールと同様な形状を含む所望形状となされればよく、その形状を限定するものではない。又、膨出部４及びキャップ体９については、既に述べた通りの形状であればよい。
【００１９】
即ち、上記各実施形態における、棒状本体２、バール片３、膨出部４、支持座５、屈曲部６、補強材７、第二バール部１０、キャップ体９、バール片８の夫々の形状や寸法或いは曲折角度等は上記各実施形態のものに限定されず、本発明の意図する範囲内で適宜設計変更可能である。
尚、本発明の開閉器１によって開放される蓋１３は、方形、円形、多角形等適宜形状のもので、少なくともその周縁に、上面及び蓋受枠１２の内周面側に開口してバール片３が挿入可能なバール孔１４を備えたものであればよく、又、とくに蓋受枠１２の上部隅角部１８と対向するバール孔１４の開口部に適宜形状の凹陥部１５が追設されていると、該凹陥部１５にバール片３の上側の膨出部４を挿入、嵌合してバール片３の位置決めができ好ましい。尚又、バール孔１４に前記凹陥部１５が追設されていない蓋１３であっても、バール孔１４にバール片３の先端部が係止可能な場合等においては、本発明の開閉器１によって蓋１３の開放が可能である。
【００２０】
【発明の効果】
以上詳述した如く、本発明の地表埋設室用蓋の開閉器は、棒状本体の先端部に、蓋受枠に支持された蓋の周縁のバール孔に挿入される偏平状のバール片を連設するとともに、該バール片の上側に、前記バール孔の開口部に追設された凹陥部に嵌合される膨出部を設け、バール片の下側の付根部近傍に、前記蓋受枠の上面に当接されて回動支点をなす支持座を設けてなるために、密嵌せる蓋の開放時に、バール片を蓋受枠に支持された蓋の周縁のバール孔に挿入すると、バール片下側の付根部近傍にある支持座が蓋受枠の上面に当接して棒状本体をその上面から浮上させて支持し、又、これに加えて前記バール孔の開口部に凹陥部が追設されている場合には、該凹陥部にバール片上側の膨出部が嵌合して、バール片がバール孔内で遊ぶことなく位置決めされる。従って、前記支持座或いはこれと膨出部との作用により、開閉器をバール孔へ安定状態で嵌挿できるとともに、支持座を支点として棒状本体の上部末端を少ない力で下方へスムーズに回動操作できると同時に、梃子作用により、バール孔に係止するバール片の先端が上動して蓋を容易に開放することができる。又、回動支点となる支持座を蓋受枠の上面に当接することで、棒状本体と蓋受枠との接触を回避でき、従来のように開閉器自体や蓋受枠の内周面の上部隅角部が摩耗、損傷するようなことがない。
【００２１】
又、本発明の地表埋設室用蓋の開放方法は、棒状本体の先端部に偏平状のバール片を連 設するとともに、該バール片の上側に膨出部を設け、バール片の下側の付根部近傍に支持座を設けて開閉器を形成し、蓋受枠に支持された蓋の周縁のバール孔に前記開閉器のバール片を挿入するとともに、膨出部を前記バール孔の開口部に追設された凹陥部に嵌合し、支持座を前記蓋受枠の上面に当接し、該支持座を支点として棒状本体を回動操作するために、密嵌せる蓋の開放時に、バール片上側の膨出部が蓋のバール孔の凹陥部に嵌合することにより、バール片がバール孔内で遊ぶことなく確実に位置決めされるとともに、支持座が蓋受枠の上面に当接して棒状本体をその上面から浮上させて支持する。従って、凹陥部を追設したバール孔に開閉器をより一層安定状態で嵌挿でき、且つ支持座を支点として棒状本体の上部末端側を下向き方向へ回動させる操作がスムーズに行えると同時に、梃子作用によりバール孔に係止するバール片の先端が上動して、蓋を容易に浮上させて開放することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る開閉器を示し、（イ）は正面図、（ロ）は平面図、（ハ）は使用例を示す断面図。
【図２】図１における開閉器の使用例と蓋を示し、（イ）は使用例を示す要部拡大断面図、（ロ）は同要部拡大平面図、（ハ）は蓋の開放途中の要部拡大断面図、（ニ）は開放する蓋の要部拡大平面図。
【図３】本発明の他実施形態に係る開閉器を示し、（イ）は一部省略正面図、（ロ）は同平面図、（ハ）は（イ）のＡ−Ａ端面図、（ニ）は使用例を示す一部断面図。
【図４】本発明の他実施形態に係る開閉器を示し、（イ）は一部省略正面図、（ロ）は同平面図、（ハ）は（イ）のＢ−Ｂ端面図、（ニ）は（ロ）におけるＣ−Ｃ矢視図、（ホ）は（ロ）におけるＤ−Ｄ断面図、（ヘ）は使用例を示す一部断面図、（ト）は（ヘ）におけるＥ−Ｅ拡大矢視図。
【図５】（イ）は本発明の他実施形態に係る開閉器を示す一部省略正面図、（ロ）は同平面図、（ハ）は本発明の更に他実施形態に係る開閉器を示す一部省略正面図、（ニ）は同平面図、（ホ）は（ニ）におけるＦ−Ｆ矢視図。
【図６】従来の開閉器の例を示し、（イ）は正面図、（ロ）は平面図。
【図７】（イ）及び（ロ）はそれぞれ従来の開閉器の使用例を示す要部拡大断面図、（ハ）は（ロ）の平面図。
【符号の説明】
１ 開閉器
２ 棒状本体
２′ 末端
３ バール片
４ 膨出部
５ 支持座
６ 屈曲部
７ 補強材
８ バール片
９ キャップ体
１０ 第二バール部
１０ａ バール片
１０ｂ Ｔ字片
１２ 蓋受枠
１３ 蓋
１４ バール孔
１５ 凹陥部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a switch and a method for opening a cover for a surface buried room, and more particularly, to opening a cover for closing an upper surface opening of various surface buried rooms such as a manhole, a square, a valve (plug) room, and the like. And a method for opening a lid using the same .
[0002]
[Prior art]
Conventionally, as a switch for a ground surface buried room lid, for example, as shown in FIGS. 6 (a) and 6 (b), the tip of a straight rod-shaped main body 2a made of steel and having a circular cross section is formed in a tongue shape. There is a piece 3a.
In this conventional switch 1a, for example, as shown in FIGS. 7 (a) to 7 (c), a lid 13 supported by a lid receiving frame 12 surrounding an upper surface opening of various surface burial chambers 11 such as a valve chamber. The burl piece 3a is inserted into a burl hole 14 provided in the peripheral edge. Thus, the upper surface of the burl piece 3a is locked in the burl hole 14, and the lower surface of the burl piece 3a is brought into contact with the upper corner portion 18 of the inner peripheral surface of the lid receiving frame 12, and the rod-shaped main body 2a is supported by the corresponding contact portion as a fulcrum. Is rotated downward to open the lid 13 closed by leverage.
[0003]
[Problems to be solved by the invention]
However, such a conventional switch 1a merely forms the tip of the straight rod-shaped main body 2a into a tongue-shaped bar piece 3a, so that when the cover 13 is opened, the bar piece 3a is closed. As shown in FIG. 7C, when the bar-shaped body 2a is inserted into the burl hole 14, the bar piece 3a is not fixed in the burl hole 14 but easily moves in the direction of the arrow. There was a problem that the rotating operation was difficult.
[0004]
Also, there is no problem in opening the lid 13 fitted with a small gap between the lid receiving frame 12 and the lid receiving frame 12 as shown in FIG. As a result, the outer peripheral surface of the lid 13 and the inner peripheral surface of the lid receiving frame 12 are smoothly processed so as to prevent generation of noise due to rattling generated between the lid receiving frame 12 and the lid 13, so that there is no gap therebetween. For example, as shown in FIGS. 7B and 7C, when the lid 13 is closely fitted into the lid receiving frame 12, the conventional switch 1a requires time and effort to open the lid 13 to be closely fitted. And the straight rod-shaped main body 2a bends.
Further, in any case, as shown in FIGS. 7A and 7B, the lower surface of the crowbar piece 3a is always brought into contact with the upper corner 18 of the inner peripheral surface of the lid receiving frame 12, and the corresponding contact portion is used as a fulcrum. Due to the turning operation, the lower surface and the upper corner portion 18 of the burl piece 3a are locally worn and damaged, and there is also a problem that it is difficult to perform a lever action using the fulcrum as a fulcrum.
[0005]
The present invention has been made in view of such a conventional problem, and when the lid 13 to be tightly closed is opened, the turning operation can be performed stably and easily, and the deformation of the rod-shaped main body 2 at the time of the turning operation is prevented. An object of the present invention is to provide a switch for a cover for a ground surface buried room and a method for opening the cover using the same.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the switch of the lid for a surface buried room of the present invention is a flat-shaped lid inserted into a bur hole 14 on the peripheral edge of a lid 13 supported by a lid receiving frame 12 at the tip of the rod-shaped main body 2. The burl piece 3 is continuously provided, and a bulging portion 4 is provided on the upper side of the burl piece 3 so as to be fitted into a recessed portion 15 added to the opening of the burl hole 14. A support seat 5 is provided in the vicinity of the base portion of the cover 5 so as to be in contact with the upper surface of the lid receiving frame 12 and form a pivot point .
[0007]
According to the above-described switch for the surface buried room lid of the present invention, when the crowbar piece 3 is inserted into the crowbar hole 14 on the peripheral edge of the lid 13 supported by the lid receiving frame 12 when the tightly fitted lid 13 is opened, 3 The support seat 5 near the bottom of the bottom comes into contact with the upper surface of the lid receiving frame 12 to support the rod-shaped main body 2 by floating from the upper surface thereof. When the portion 15 is additionally provided, the bulging portion 4 on the upper side of the burl piece 3 is fitted into the concave portion 15, and the burl piece 3 is positioned in the burl hole 14 without playing.
Accordingly, the switch 1 can be stably inserted into the burl hole 14 by the action of the support seat 5 or the bulging portion 4 and the upper end of the rod-shaped main body 2 is supported by the support seat 5 with a small force. At the same time that the pivoting operation can be performed smoothly downward, the tip of the burl piece 3 locked in the burl hole 14 is moved upward by the lever action, so that the lid 13 can be easily opened. In addition, by contacting the support seat 5 serving as a rotation fulcrum with the upper surface of the lid receiving frame 12, contact between the rod-shaped main body 2 and the lid receiving frame 12 can be avoided, and the switch 1 itself and the upper corner of the inner peripheral surface of the lid receiving frame 12 can be avoided. The corners 18 are not worn or damaged .
[ 00 08 ]
Further, in the method for opening the lid for a surface buried room according to the present invention , a flat bar member 3 is continuously provided at the tip of the rod-shaped main body 2, and a bulging portion 4 is provided on the upper side of the bar member 3. A switch 1 is formed by providing a support seat 5 near a lower base portion of the switch 3, and the burl piece 3 of the switch 1 is inserted into a burl hole 14 on a peripheral edge of a lid 13 supported by a lid receiving frame 12. The bulging portion 4 is fitted into a concave portion 15 added to the opening of the burl hole 14, the support seat 5 abuts on the upper surface of the lid receiving frame 12 , and the rod-shaped main body 2 is Ru Monodea to rotate operation.
According to the present invention, when the lid 13 to be closely fitted is opened, the bulging portion 4 on the upper side of the burl piece 3 is fitted into the concave portion 15 of the burl hole 14 of the lid 13 so that the burl piece 3 is attached to the burl hole 14. The support seat 5 abuts on the upper surface of the lid receiving frame 12 and floats and supports the rod-shaped main body 2 from the upper surface. Therefore, the switch 1 can be more stably inserted into the burl hole 14 in which the concave portion 15 is additionally provided, and the operation of turning the upper end of the rod-shaped main body 2 downward in the downward direction with the support seat 5 as a fulcrum is smooth. At the same time, the tip of the crowbar piece 3 locked in the crowbar hole 14 moves upward by leverage, and the lid 13 can be easily floated and opened.
[00 09 ]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 (a) and 1 (b) show a switch according to an embodiment of the present invention, and 1 is a switch of the present invention, wherein the tip of a rod-shaped main body 2 having a circular cross section is flattened and the tip is formed. A burl piece 3 is bent upward to form a substantially inverted letter shape, and a bulging portion 4 is provided at a bent part of the substantially inverted letter shape above the burl piece 3, near the bottom of the bottom piece of the burl piece 3. That is, a short columnar support seat 5 intersecting with the rod-shaped main body 2 is provided at a position slightly below the bulging portion 4 in the terminal direction opposite to the burl piece 3 below the bulging portion 4.
In addition, a bent portion 6 is provided at a position away from the support seat 5 in a terminal direction opposite to the crowbar piece 3, and the rod-shaped main body 2 is bent in a substantially elliptical shape, and a tongue-shaped crowbar piece 8 is provided at the end 2 '. And a rib-shaped reinforcing member 7 extending from the support seat 5 along the length direction of the distal end 2 ′ on the narrow side of the bent portion 6, that is, on the lower side of the rod-shaped main body 2. Provided.
The switch 1 is made of any material such as metal, resin and the like according to desired performance.
[00 10 ]
Next, a usage example of the switch 1 will be described with reference to FIGS. 1 (C) and 2 (A) to 2 (C).
First, the end 2 'of the rod-shaped main body 2 is gripped, and a burr hole is formed in a burr hole 14 provided on a peripheral edge of a lid 13 supported by a lid receiving frame 12 surrounding an upper surface opening of various grounding chambers 11 such as a valve chamber. At the same time, the bulging portion 4 is fitted into the concave portion 15 additionally provided in the burl hole 14, and the support seat 5 comes into contact with the upper surface of the lid receiving frame 12. Next, the distal end 2 ′ of the rod-shaped main body 2 is pivoted downward by using the support seat 5 as a fulcrum and a lever action is performed, whereby the tip of the bar piece 3 locked in the burl hole 14 moves upward, and the lid 13 floats. It is released.
[00 11]
When the lid 13 is opened, the bulged portion 4 on the upper side of the burl piece 3 is fitted into the concave portion 15 of the burl hole 14 of the lid 13, so that the burl piece 3 is positioned in the burl hole 14 without playing. At the same time, in combination with the fact that the rod-shaped main body 2 is bent in a substantially O-shape, the tip of the bar piece 3 is automatically locked in the crowbar hole 14 by the weight of the rod-shaped main body 2, and the support seat 5 is connected to the lid receiving frame 12. The end 2 'of the bent rod-shaped main body 2 is naturally bent in the pivoting direction (downward) so as to press the upper surface of the rod-shaped body, so that the rod-shaped main body 2 is gradually inclined. For this reason, the switch 1 can be mounted in a stable state, and it is easy to apply a downward force that exerts a lever action to the end 2 ′ side of the rod-shaped main body 2, which is in a gently inclined state. The lid 13 can be opened. Further, at this time, the reinforcing material 7 attached to the lower side of the bent portion 6 increases the sectional modulus of the rod-shaped main body 2, prevents the elastic deformation thereof, and makes the leverage work well, so that the lid 13 can be opened more quickly. Can be done.
[00 12 ]
The burr hole 14 at the peripheral edge of the lid 13 opens on the upper surface of the lid 13 and the inner peripheral surface side of the lid receiving frame 12, and as shown in FIG. A substantially semicircular concave portion 15 is additionally provided substantially at the center of the facing portion, while the bulging portion 4 of the burl piece 3 has the substantially semicircular concave portion as shown in FIG. Although it is formed in a substantially semi-cylindrical shape so as to conform to the portion 15, the shape may be any shape as long as the bulging portion 4 and the recessed portion 15 are formed in corresponding shapes so as to be able to be fitted into the concave and convex portions.
A description will be given of a usage example of the tongue-shaped bar piece 8 at the end 2 ′ of the rod-shaped main body 2. Before the lid 13 is released by the bar piece 3, the lid 13 to be closely fitted is set in a state where it is easy to open in advance. For this purpose, the bur piece 8 is inserted into another bur hole provided in the peripheral edge of the lid 13 and is then gouge to loosen the fitting between the lid 13 and the lid receiving frame 12 or to serve as a normal bur in other places. Can be used.
[00 13 ]
3A to 3C show a switch according to another embodiment of the present invention. The switch 1 of the present invention is a modified example of the switch shown in FIG. The above is different except that the seat 5 has a long rod-like handle shape, the rod-shaped main body 2 is made longer, and a cap body 9 having a rectangular tubular shape is integrally provided at the end 2 ′. It has the same structure as that shown in FIG.
[00 14 ]
In this use example of the switch 1, the opening of the lid 13 by the burl piece 3 is the same as the use example shown in FIGS. 1 (C) and 2 (A) to 2 (C), and thus will be referred to. The support seat 5 of the switch 1 is formed in a long rod shape, and the length of contact with the upper surface of the lid receiving frame 12 increases, so that the support seat 5 is mounted on the burl hole 14 and levered (FIG. 1 (c) and FIG. 2). (A) and (C)) have an advantage in that the stability is further improved.
Next, an example of use of the cap body 9 at the end 2 'of the rod-shaped main body 2 will be described with reference to FIG.
That is, after the cover 13 is opened by the burl piece 3, the valve opening / closing screw 17 of the buried equipment 16 (for example, a fire hydrant, a gate valve, etc.) disposed in the various underground burial chambers 11 and the underground burial chamber 11 'such as a valve room. Is rotated to open and close the valve and the like. A valve for grasping the rod-shaped main body 2 from the upper opening of the lid receiving frame 12 and inserting the switch 1, and the cap body 9 at the end 2 'of the valve is suspended from the buried device 16. The valve opening / closing screw 17 is rotated via the rod-shaped main body 2 and the cap body 9 by being inserted into the opening / closing screw 17 and rotating the support seat 5 which is a horizontal handle at the upper position.
The shape of the square tubular cap body 9 is arbitrary, as long as it can rotate the valve opening / closing screw 17 according to the shape of the valve opening / closing screw 17 into which the cap body 9 is inserted. Good.
[00 15 ]
FIGS. 4A to 4E show a switch according to still another embodiment of the present invention. The switch 1 of the present invention has a front end portion of a straight rod-shaped main body 2 having no bent portion 6 having a substantially rectangular shape. A tongue-shaped burl piece 3 is formed on the upper surface thereof, and a bulging portion 4 is formed on the upper side thereof. A long rod-shaped support seat 5 whose other end is a T-shaped piece 10b as a second bar portion 10 is provided so as to intersect the rod-shaped main body 2, and extends from the support seat 5 in the length direction of the distal end 2 '. And a rib-shaped reinforcing member 7 is provided, and a cap body 9 is integrally provided at the end 2 '.
[00 16]
Since the switch 1 does not have the bent portion 6 that bends the rod-shaped main body 2 into a substantially elliptical shape, the burl piece 3 has a burl hole compared to the switch 1 shown in FIGS. 1 and 3 having the bent portion 6. Although the rod-shaped main body 2 when inserted into the cover 14 is slightly upright and the degree of inclination with respect to the rotation direction is reduced, an example of opening the lid 13 with the burl piece 3 is shown in FIGS. 2A to 2C. Since this is the same as the usage example, this is used. Also, the usage example of the support seat 5 forming the handle and the cap body 9 at the end 2 ′ is the same as the usage example shown in FIG. Invite.
Thus, as shown in FIG. 4F, an example of use of the bar piece 10a as the second bar portion 10 at one end of the support seat 5 is a rod-shaped main body 2 and a long rod-shaped crossing the rod-shaped main body 2. Since the support seat 5 has a crane shape, the burl piece 10a at one end of the support seat 5 is inserted into the burl hole 14, and the end 2 'side of the rod-shaped main body 2 is moved upward to gouge the burl hole 14. Before the lid 13 is released by the burl piece 3, the tight fitting state with the lid receiving frame 12 can be loosened, or it can be used as a normal burr or crane in other places.
As shown in FIGS. 4B and 4E, the T-shaped piece 10b at the other end of the support seat 5 has the center axis of the support seat 5 whose diameter gradually decreases toward the end. By projecting the plate piece against both sides thereof, it has a substantially inverted T-shape in plan view. In use, the elongated rod-shaped support seat 5 is made substantially vertical, and the T-shaped piece 10b is engaged with a locking hole formed in the lid 13 as shown in FIGS. 4 (shown by a broken line in FIG. 4 (e)), and the T-piece 10 b is rotated about the support seat 5 with the support seat 5 in the locking hole 20 by an appropriate angle. After the cover 13 is opened by the bar piece 3, the cover 13 can be lifted and safely moved by grasping the rod-shaped main body 2 and the support seat 5 after the cover 13 is opened by the burl piece 3.
[00 17]
In each of the above embodiments, the rod-shaped main body 2 may have an appropriate cross-sectional shape other than a circle, such as an ellipse, a semicircle, a triangle, a square, and a polygon. The length may be appropriately designed according to the purpose of use according to the size and weight of the lid 13 or the burial depth of the burying equipment 16 in the surface burying room 11 or the underground burying room 11 '. Just fine. Further, the shape and size of the burl piece 3 may be adapted to the burl hole 14 of the lid 13, and if a bent portion having a substantially inverted shape is provided at the tip thereof, the burr piece is bent when the lid 13 is opened. Although it is easy to lock into the hole 14 and is preferable, the bending angle of such a substantially inverted letter is not particularly limited, and for example, the tongue-shaped bar piece 3 as shown in FIG. 4 may be used.
In addition, the support seat 5 is also appropriately formed so as to form a lever fulcrum, such as an elliptical column, a semi-columnar, a triangular column, a quadrangular column, a polygonal column, or the like, in addition to the columnar column. It may be integrated with the rod-shaped main body 2 by means, and in the case of a long rod shape, a second burl portion 10 may be provided at its end as needed. Also, the bending angle of the bent portion 6 having a substantially rectangular shape may be appropriately determined according to the length of the rod-shaped main body 2, the rotational operability, and the like.
[00 18 ]
Further, as shown in FIGS. 5 (a) and 5 (b), the reinforcing member 7 is connected to the bulging portion 4 on the upper side of the rod-shaped main body 2 having the bent portion 6 and has a length in the terminal direction opposite to the bar piece 3. 5 (c) to 5 (e), the bulging portion 4 itself is directly above the burl piece 3 on the upper side of the rod-shaped main body 2 as shown in FIGS. It may be provided extending along the length direction. In these cases, it is preferable to prevent deformation of the burl piece 3 itself, which is located ahead of the support seat 5, or it is preferable that the burr piece 3 itself be provided on the upper and lower sides of the rod-shaped body 2. If it is provided along the length direction on both sides of the switch, a more robust switch can be formed. Furthermore, the shape may be any as long as it can reinforce the burl piece 3, the bent portion 6 and the rod-shaped main body 2, and the appropriate shape may be integrated by appropriate means along the length direction of the rod-shaped main body 2. The invention is not limited to the embodiments.
Also, the second burl portion 10 and the burl piece 8 need only be formed in a desired shape including a shape similar to a normal burl, and the shapes are not limited. Further, the bulging portion 4 and the cap body 9 may have the shapes as described above.
[00 19 ]
That is, the respective shapes of the bar-shaped main body 2, the bar piece 3, the bulging part 4, the support seat 5, the bent part 6, the reinforcing material 7, the second bar part 10, the cap body 9, and the bar piece 8 in each of the above embodiments. The size, the bending angle, and the like are not limited to those of the above embodiments, and the design can be appropriately changed within the range intended by the present invention.
The lid 13 opened by the switch 1 of the present invention is of a suitable shape such as a square, a circle, a polygon, or the like. It is sufficient that the burr hole 3 is provided with a burl hole 14 into which the burr hole 3 can be inserted. In particular, an appropriately shaped concave portion 15 is additionally provided at the opening of the burl hole 14 facing the upper corner portion 18 of the lid receiving frame 12. In this case, the bulging portion 4 on the upper side of the burl piece 3 is inserted into the concave portion 15 and fitted therein, which is preferable because the burl piece 3 can be positioned. Even if the cover 13 does not have the concave portion 15 additionally provided in the burl hole 14, the switch 1 of the present invention may be used when the tip of the burl piece 3 can be locked in the burl hole 14. Thereby, the lid 13 can be opened.
[00 20 ]
【The invention's effect】
As described in detail above, the open / close switch of the lid for the surface buried room of the present invention is provided with a flat bar piece that is inserted into a bar hole on the periphery of the lid supported by the lid receiving frame at the tip of the rod-shaped main body. A bulge portion is provided on the upper side of the burl piece to be fitted into a concave portion additionally provided at the opening of the burl hole, and the upper surface of the lid receiving frame is provided near a lower base of the burl piece. In order to provide a support seat that is in contact with a fulcrum, a crowbar piece is inserted into a crowbar hole on a peripheral edge of the lid supported by the lid receiving frame when the lid to be tightly closed is opened. A support seat in the vicinity of the base portion of the burr hole comes in contact with the upper surface of the lid receiving frame to lift and support the rod-shaped main body from the upper surface, and in addition to this, a concave portion is additionally provided at the opening of the burl hole. In this case, the bulging portion on the upper side of the burl piece is fitted into the concave portion, and the burl piece does not play in the burl hole. -Decided is fit. Therefore, the switch can be stably inserted into the burl hole by the action of the support seat or the bulging portion, and the upper end of the rod-shaped body can be smoothly rotated downward with a small force around the support seat as a fulcrum. At the same time as the operation can be performed, the tip of the burl piece locked in the burl hole moves upward by the leverage action, so that the lid can be easily opened. In addition, the contact between the rod-shaped body and the lid receiving frame can be avoided by abutting the support seat serving as a rotation fulcrum on the upper surface of the lid receiving frame. No parts are worn or damaged .
[ 00 21 ]
Further, the method of opening the lid for a surface buried room of the present invention is such that a flat bar piece is continuously provided at the tip of the rod-shaped main body , and a bulging portion is provided on the upper side of the bar piece, and a lower side of the bar piece is provided. A switch is formed by providing a support seat in the vicinity of the base , and a bar piece of the switch is inserted into a burr hole on the periphery of the lid supported by the lid receiving frame, and a bulging portion is formed in an opening of the burl hole. fitted into concave portion which is additionally provided, the support seat contact with the upper surface of the lid receiving frame, in order to the rod-like body was you turning operation as a fulcrum the support seat, upon opening of the lid to tightly fit, bar The bulge on one side fits into the recess of the crowbar hole in the lid, so that the crowbar piece is securely positioned without playing in the crowbar hole, and the support seat comes into contact with the upper surface of the lid receiving frame to form a rod. The main body is lifted from the upper surface and supported. Therefore, the switch can be more stably inserted into the burl hole in which the concave portion is additionally provided, and the operation of rotating the upper end side of the rod-shaped main body in the downward direction with the support seat as a fulcrum can be performed smoothly, and at the same time, The tip of the crowbar piece locked in the crowbar hole is moved upward by the leverage action, so that the lid can be easily floated and opened.
[Brief description of the drawings]
1A and 1B show a switch according to an embodiment of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a plan view, and FIG.
FIGS. 2A and 2B show an example of use and a cover of the switch in FIG. 1, wherein FIG. 2A is an enlarged sectional view of a main part showing an example of use, FIG. 2B is an enlarged plan view of the main part, and FIG. (D) is an enlarged plan view of a main part of a lid to be opened.
3A and 3B show a switch according to another embodiment of the present invention, wherein FIG. 3A is a partially omitted front view, FIG. 3B is a plan view thereof, FIG. 3C is an AA end view of FIG. D) is a partial sectional view showing a usage example.
4A and 4B show a switch according to another embodiment of the present invention, in which FIG. 4A is a partially omitted front view, FIG. 4B is a plan view of the same, FIG. 4C is a BB end view of FIG. (D) is a sectional view taken along line CC in (b), (e) is a sectional view taken along line DD in (b), (f) is a partial sectional view showing a usage example, and (g) is an E in (f). -E enlarged arrow view.
5A is a partially omitted front view showing a switch according to another embodiment of the present invention, FIG. 5B is a plan view thereof, and FIG. 5C is a switch according to still another embodiment of the present invention. (D) is a plan view of the same, and (e) is a view taken along the line FF in (d).
6A and 6B show an example of a conventional switch, wherein FIG. 6A is a front view and FIG. 6B is a plan view.
FIGS. 7A and 7B are enlarged cross-sectional views of a main part showing an example of use of a conventional switch, and FIG. 7C is a plan view of FIG.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 switch 2 bar-shaped main body 2 ′ end 3 bar piece 4 bulging part 5 support seat 6 bent part 7 reinforcing material 8 bar piece 9 cap body 10 second bar part 10 a bar piece 10 b T-shaped piece 12 lid receiving frame 13 lid 14 bar Hole 15 recess

Claims (2)

棒状本体（２）の先端部に、蓋受枠（１２）に支持された蓋（１３）の周縁のバール孔（１４）に挿入される偏平状のバール片（３）を連設するとともに、該バール片（３）の上側に、前記バール孔（１４）の開口部に追設された凹陥部（１５）に嵌合される膨出部（４）を設け、バール片（３）の下側の付根部近傍に、前記蓋受枠（１２）の上面に当接されて回動支点をなす支持座（５）を設けてなることを特徴とする地表埋設室用蓋の開閉器。 A flat bar piece (3) to be inserted into a bar hole (14) on the periphery of a lid (13) supported by a lid receiving frame (12 ) is continuously provided at the tip of the rod-shaped main body (2). On the upper side of the burl piece (3), there is provided a bulging portion (4) to be fitted into a concave portion (15) added to the opening of the burl hole (14), and the lower side of the burl piece (3) is provided. And a support seat (5), which is in contact with the upper surface of the lid receiving frame (12) and forms a pivot point, is provided near the base of the lid . 棒状本体（２）の先端部に偏平状のバール片（３）を連設するとともに、該バール片（３）の上側に膨出部（４）を設け、バール片（３）の下側の付根部近傍に支持座（５）を設けて開閉器（１）を形成し、蓋受枠（１２）に支持された蓋（１３）の周縁のバール孔（１４）に前記開閉器（１）のバール片（３）を挿入するとともに、膨出部（４）を前記バール孔（１４）の開口部に追設された凹陥部（１５）に嵌合し、支持座（５）を前記蓋受枠（１２）の上面に当接し、該支持座（５）を支点として棒状本体（２）を回動操作する地表埋設室用蓋の開放方法。 A flat bar piece (3) is continuously provided at the tip end of the rod-shaped main body (2), and a bulging portion (4) is provided above the bar piece (3). A switch (1) is formed by providing a support seat (5) in the vicinity of the base, and the switch (1) is inserted into a burr hole (14) on the periphery of a lid (13) supported by a lid receiving frame (12 ). While inserting the burl piece (3), the bulging portion (4) is fitted into the recess (15) additionally provided in the opening of the burl hole (14), and the support seat (5) is connected to the lid receiving frame. contact with the top surface (12), said support seat (5) rod-like body (2) open method of earth table vault lid you turning operation as a fulcrum.

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