JP4111388B2

JP4111388B2 - Floor inspection port

Info

Publication number: JP4111388B2
Application number: JP2003012426A
Authority: JP
Inventors: 辰夫庄司; 秀靖細谷
Original assignee: Naka Corp
Current assignee: Naka Corp
Priority date: 2003-01-21
Filing date: 2003-01-21
Publication date: 2008-07-02
Anticipated expiration: 2023-01-21
Also published as: JP2004225294A

Description

【０００１】
【発明の属する技術分野】
この発明は、床点検口に関するもので、更に詳細には、床部に設けられる開口部に取り付けられる外枠と、外枠内に着脱可能に嵌め込まれる内蓋とを締結可能にした床点検口に関するものである。
【０００２】
【従来の技術】
従来、枠材を四辺形状に枠組みして床部に設けられる開口部に取り付けられる外枠と、四辺形状に枠組みされる枠材を具備し、パッキンを介して外枠内に着脱可能に嵌め込まれる内蓋とを締結可能にした防水、防臭型の床点検口が知られている。この種の床点検口において、ガタツキを防止するために、外枠角部の隣接する枠材相互の突合わせコーナー部を締結するコーナー締結金具が用いられている。この場合、コーナー締結金具に、内蓋に設けられたボルト挿通孔を挿通する締結ボルトが螺合可能な締結のための雌ねじ部（ナット）と枠材の下縁を抱き込んで直角度の規制を行う折返し片部を設け、コーナー締結金具の下面から挿通されるねじを枠材にねじ止めする構造であり、また、外枠及び内蓋の枠材の組立には、コーナーピースを用いている（例えば、特許文献１参照）。
【０００３】
【特許文献１】
実公平２−４２８１７号公報（第２頁第３欄第２１行〜同頁第４欄第３行、第２頁第４欄第３３行〜第４４行、第４図）
【０００４】
【発明が解決しようとする課題】
しかしながら、従来のこの種の床点検口においては、コーナー締結金具が外枠の枠材の下縁を抱き込んでいるため、外枠における隣接する枠材の直角度の規制を行えるが、荷重により枠が変形するおそれがあった。枠が変形すると、内蓋の開閉に支障をきたすという問題がある。また、外枠と内蓋の間に、ゴミや砂利等が詰まると、閉塞状態の内蓋の開放に手間を要するという問題があった。また、従来の床点検口においては、コーナー締結金具以外にコーナーピースを併用する必要があるため、構成部材の部品点数が多くなると共に、組立工程も煩雑になるという問題もあった。
【０００５】
この発明は、上記事情に鑑みなされたもので、外枠及び内蓋の枠材の変形、ガタツキを防止すると共に、内蓋の開閉を容易にし、かつ、構成部材及び組立工数を削減して組立を容易にした床点検口を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、この発明の床点検口は、枠材を四辺形状に枠組みして床部に設けられる開口部に取り付けられる外枠と、四辺形状に枠組みされる枠材と、これら枠材の下端部に固定される底板とを具備し、上記外枠内に着脱可能に嵌め込まれる内蓋とからなる床点検口において、上記外枠及び内蓋は、隣接する上記枠材同士を直交状に枠組みすると共に、固定手段によって固定する平面視略Ｌ字状の固定壁片と、この固定壁片から水平方向に延在する水平片とを一体に形成した角部固定部材を具備し、上記外枠の角部固定部材は、上記水平片に雌ねじ部が設けられ、上記内蓋の角部固定部材は、上記水平片に締結ねじが挿通可能な貫通孔を設ける円筒状基部を具備する締結ねじ挿通部が設けられ、該締結ねじ挿通部の先端側には、上記底板に設けられた透孔内に挿入可能な案内筒部が設けられると共に、該案内筒部と上記円筒状基部との間に、上記底板の上面に係合可能な外側段部が形成され、上記貫通孔を挿通する締結ねじを、上記外枠の角部固定部材の水平片に設けられた雌ねじ部に螺合可能に形成してなる、ことを特徴とする（請求項１）
【０００７】
この発明において、上記角部固定部材の固定壁片と枠材との当接面に、互いに係合して垂直方向の移動を規制する位置決め用段部を設ける方が好ましい（請求項２）。
【０００８】
また、上記内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より大径の取外し用雌ねじ部を設け、この取外し用雌ねじ部に、内蓋開閉用工具を螺合可能に形成するか、あるいは、上記内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より小径の係止孔部を有する貫通孔と、この貫通孔の上端開口部に連なる開口凹部とを設け、上記締結ねじには、上記貫通孔及び係止孔部内を挿通する軸部と、この軸部の先端に設けられて上記雌ねじ部に螺合可能であって上記係止孔部より大径の雄ねじ部と、軸部の基端に設けられて上記開口凹部内に収容可能な頭部とを設ける方が好ましい（請求項３，４）。
【０００９】
請求項１記載の発明によれば、角部固定部材に、隣接する枠材同士を直交状に枠組みすると共に、固定手段によって固定する平面視略Ｌ字状（略直交状）の固定壁片と、この固定壁片から水平方向に延在する水平片とを一体に形成し、内蓋の角部固定部材の水平片に設けられた貫通孔を挿通する締結ねじを、外枠の角部固定部材の水平片に設けられた雌ねじ部に螺合可能に形成することにより、荷重によって固定壁片が直角（９０度）より拡がる又は狭まる変形が生じないので、枠材の四辺形の直角を常に保つことができる。
【００１０】
請求項２記載の発明によれば、角部固定部材の固定壁片と枠材との当接面に、互いに係合して垂直方向の移動を規制する位置決め用段部を設けることにより、角部固定部材の固定壁片と枠材との組み付けを正確かつ容易にすることができる。
【００１１】
請求項３記載の発明によれば、内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より大径の取外し用雌ねじ部を設け、この取外し用雌ねじ部に、内蓋開閉用工具を螺合可能に形成することにより、締結ねじと雌ねじ部との螺合状態を解除して締結ねじを取り外した後、取外し用雌ねじ部に内蓋開閉用工具を螺合して、外枠内に嵌め込まれている内蓋を取り外して開放することができる。
【００１２】
請求項４記載の発明によれば、内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より小径の係止孔部を有する貫通孔と、この貫通孔の上端開口部に連なる開口凹部とを設け、締結ねじには、取付孔及び係止孔部内を挿通する軸部と、この軸部の先端に設けられて雌ねじ部に螺合可能であって係止孔部より大径の雄ねじ部と、軸部の基端に設けられて開口凹部内に収容可能な頭部とを設けることにより、締結ねじと雌ねじ部との螺合状態を解除して締結ねじを上方へ引き上げると、雄ねじ部が係止孔部の周縁に係合し、更に締結ねじを引き上げることにより、内蓋が外枠の上方に移動して開放することができる。
【００１３】
【発明の実施の形態】
以下に、この発明の床点検口について、添付図面に基づいて詳細に説明する。
◎第一実施形態
図１は、この発明の床点検口の第一実施形態の取付状態を示す断面図、図２は、上記床点検口の要部を示す概略斜視図、図３は、上記床点検口の平面図（ａ）及び側面図（ｂ）、図４は、図３のＩ−Ｉ線に沿う拡大断面図である。
【００１４】
上記床点検口１は、図１に示すように、床Ｆ部に設けられた略方形状の開口部２内に取り付けられる外枠１０と、この外枠１０内に着脱可能に嵌合する内枠２０を具備する内蓋３０とで主要部が構成されており、締結ねじ６０によって外枠１０と内蓋３０とが締結可能に形成されている。なお、外枠１０と内枠２０との隙間は、シール部材であるパッキンＰにてシールされて、防水性及び防臭性が図られている。
【００１５】
上記外枠１０は、図４〜図７及び図９に示すように、４本の枠材すなわち外枠材１１を枠組みして四辺形状に形成され、各角部に配設される角部固定部材４０（以下に外枠コーナーブロック４０という）によって外枠材１１が直交状に接合固定されている。
【００１６】
上記外枠材１１は、例えばアルミニウム合金製の押出形材にて形成されており、垂直基部１２の下端部内方側に内蓋載置段部１３を介してパッキン嵌合溝１４を有する取付フランジ部１５が延在され、垂直基部１２の外側面の上下端部には、対向するアンカー用の係合溝１６を有する互いに平行な上部係合凸条１７ａ及び下部係合凸条１７ｂが突設されている。この場合、下部係合凸条１７ｂの上面は、後述する外枠コーナーブロック４０の固定壁片４１に形成される位置決め用段部７０ｂと係合する位置決め用段部７０ａを形成している。また、垂直基部１２の上端には、例えばステンレス製の化粧枠部材１８のアリ部１８ａを嵌挿するアリ溝１２ａが形成されている。なお、垂直基部１２の内側面における内蓋載置用段部１３の上方側は内蓋載置用段部１３側に向かって漸次肉厚に形成されている。このように形成される外枠材１１は、端部が４５度にカットされて、隣接する同士が突き合わせ接合された直交状態で外枠コーナーブロック４０に固定されている。なお、化粧部材１８も端部が４５度にカットされて、隣接する同士が直交状に突き合わせ接合されている。このようにして、外枠コーナーブロック４０によって各角部が固定された四辺形状の外枠１０のパッキン嵌合溝１４には、中空円筒状のパッキンＰが嵌合されている。
【００１７】
上記外枠コーナーブロック４０は、図４〜図７及び図９に示すように、外枠材１１同士を直交状に枠組みすると共に、固定手段例えば固定ねじ８０によって固定する平面視略Ｌ字状（略直交状）の固定壁片４１と、この固定壁片４１の下端から水平方向に延在する水平片４２とが一体に形成されると共に、水平片４２上に雌ねじ部４３が一体に形成された例えばアルミニウム製鋳物にて形成されている。
【００１８】
この場合、固定壁片４１の内側面には、上端から下端部付近に向かって互いに平行な複数（図面では４個の場合を示す）の補強用の垂直リブ４４が突設されている。これら垂直リブ４４の下端面は、上記外枠材１１の位置決め用段部７０ａと係合する位置決め用段部７０ｂを形成している。また、この垂直リブ４４にはねじ孔４５が設けられており、外枠材１１に穿設された取付孔１９を挿通する固定ねじ８０をねじ孔４５に螺合することによって外枠材１１を固定壁片４１に固定することができるようになっている。
【００１９】
外枠１０を組み立てるには、外枠材１１の位置決め用段部７０ａと外枠コーナーブロック４０の位置決め用段部７０ｂとが係合するように隣接する外枠材１１を外枠コーナーブロック４０の固定壁片４１の内側面にセット、すなわち、突き合わせ接合する。この状態において、外枠材１１と外枠コーナーブロック４０とは垂直方向の移動が規制される。そして、この状態で、外枠材１１に設けられた取付孔１９に挿通される固定ねじ８０を外枠コーナーブロック４０に設けられたねじ孔４５に螺合して隣接する外枠材１１同士を直交状に枠組み固定する。
【００２０】
このようにして、外枠１０の各角部の外枠材１１は、平面視略Ｌ字状（略直交状）の固定壁片４１と、この固定壁片４１の下端から水平に延在する水平片４２とを一体に形成した外枠コーナーブロック４０によって固定される。したがって、荷重によって固定壁片４１が直角（９０度）より拡がったり又は狭まったりすることがないので、外枠材１１の四辺形の直角状態を常に保持することができる。
【００２１】
また、上記雌ねじ部４３は、図１及び図４に示すように、水平片４２上に隆起する円筒部４６の内周面に埋設されるステンレス製のナットによって形成されている。なお、円筒部４６の上端には両面接着テープ４７を介してステンレス製の座金４８が固着されている。このように、雌ねじ部４３をアルミニウム製の円筒部４６内に埋設されるステンレス製のナットにて形成すると共に、円筒部４６の上端にステンレス製の座金４８を装着することによって、後述する内蓋開閉用工具１００を使用する際に、内蓋開閉用工具１００の雄ねじ部１０１の先端が当接して削られてしまうことを防止することができる。
【００２２】
上記のように構成される外枠１０を床Ｆ部に設けられた開口部２内に取り付けるには、まず、外枠１０にアンカー３を係合させる。次に、図１に示すように、外枠１０を開口部２に設置して、予め埋設されている鉄筋４とアンカー３を溶接する。そして、外枠１０の周囲にモルタルを充填し、タイル等で表面を仕上げる。この場合、アンカー３は各辺の外枠材１１の長さに応じて２ないし３個を適宜使用する。
【００２３】
一方、上記内蓋３０は、図４〜図６、図８及び図９に示すように、４本の枠材すなわち内枠材２１を四辺形状に枠組みしてなる内枠２０と、内枠２０の各角部に配設されて隣接する内枠材２１同士を直交状に接合固定する角部固定部材５０（以下に内枠コーナーブロック５０という）と、内枠２０の下端部に固定手段例えばリベット３１によって固定される四角形状の底板３２と、対向する内枠材２１と底板３２に固定手段例えば皿小ねじ３３によって固定される複数（図面では２本の場合を示す）の例えば断面略ハット状のスチール製の補強部材３４と、内枠２０と底板３２と補強部材３４とで形成される空間内に充填されるモルタル３５及びモルタル３５の表面に敷設される外枠１０の周囲に用いたタイルと同様のタイル３６とで構成されている。
【００２４】
上記内枠材２１は、例えばアルミニウム合金製の押出形材にて形成されており、垂直基部２２の下端から内方側に水平に内向きフランジ部２４が延在され、内向きフランジ部２４の基端側下面に載置段部２５を介して垂下片２６が垂設され、また、垂直基部２２の内側面の上端部には、後述する内枠コーナーブロック５０に設けられた位置決め用段部７０ｄに係合する位置決め用段部７０ｃを介して膨隆頭部２３が形成されており、この膨隆頭部２３の上端には、例えばステンレス製の化粧枠部材２８に設けられたアリ部２８ａを嵌挿するアリ溝２３ａが形成されている。このように形成される内枠材２１は、端部が４５度にカットされて、隣接する同士が突き合わせ接合された直交状態で内枠コーナーブロック５０によって固定されている。なお、化粧部材２８も端部が４５度にカットされて、隣接する同士が直交状に突き合わせ接合されている。
【００２５】
上記内枠コーナーブロック５０は、図４〜図６、図８及び図９に示すように、内枠材２１同士を直交状に枠組みすると共に、内枠材２１を固定手段例えば固定ねじ８０によって固定する平面視略Ｌ字状（略直交状）の固定壁片５１と、この固定壁片５１の上端から水平方向に延在する水平片５２とが一体に形成されると共に、水平片５２の先端側下面に隆起する円筒状の締結ねじ挿通部５３が一体に形成された例えばアルミニウム製鋳物にて形成されている。
【００２６】
この場合、固定壁片５１にはねじ孔５４が設けられており、内枠材２１に穿設された取付孔２７を挿通する固定ねじ８０がねじ孔５４に螺合（締結）されることで、隣接する内枠材２１同士が直交状に接合固定される。また、固定壁片５１の外側面の上端側には、上記内枠材２１に設けられた下向きの位置決め用段部７０ｃと係合する上向きの位置決め用段部７０ｄが形成されている。更に、水平片５２における締結ねじ挿通部５３の外周側の２箇所には、化粧カバー３７を装着するための取付孔５５を有する取付部５６が突設されている。なお、化粧カバー３７は、ステンレス製の矩形板状部材にて形成されており、その中心部には締結ねじ６０の挿通案内孔３８が穿設され、下面の２箇所には、取付部５６の取付孔５５を貫通する取付ねじ３９が例えば溶接等の固定手段によって突設されている。このように形成される化粧カバー３７は、取付ねじ３９が取付部５６の取付孔５５を貫通した状態で、突出部にナット３９ａを螺合（締結）することで、内枠コーナーブロック５０の上面に被着される。内枠コーナーブロック５０の上面に被着された化粧カバー３７と内枠部材２１の上端に装着された化粧部材２８とは同一平面上に位置するようになっている。
【００２７】
内枠２０を組み立てるには、内枠材２１の位置決め用段部７０ｃと内枠コーナーブロック５０の位置決め用段部７０ｄとが係合するように隣接する内枠材２１を内枠コーナーブロック５０の固定壁片５１の外側面にセット、すなわち、突き合わせ接合する。この状態において、内枠材２１と内枠コーナーブロック５０とは垂直方向の移動が規制される。そして、この状態で、内枠材２１に設けられた取付孔２７に挿通される固定ねじ８０を内枠コーナーブロック５０に設けられたねじ孔５４に螺合して隣接する内枠材２１同士を直交状に枠組み固定する。
【００２８】
このようにして、内枠２０の各角部の内枠材２１は、平面視略Ｌ字状（略直交状）の固定壁片５１と、この固定壁片５１の上端から水平に延在する水平片５２とを一体に形成した内枠コーナーブロック５０によって固定される。したがって、荷重によって固定壁片５１が直角（９０度）より拡がったり又は狭まったりすることがないので、内枠材２１の四辺形の直角状態を常に保持することができる。
【００２９】
また、上記締結ねじ挿通部５３は、図１及び図４に示すように、水平片５２の先端側下面に隆起する円筒状基部５３ａと、この円筒状基部５３ａに設けられる締結ねじ６０が挿通可能な貫通孔５３ｂとを具備しており、貫通孔５３ｂの上部側には、外枠コーナーブロック４０に設けられた雌ねじ部４３より大径の取外し用雌ねじ部５３ｅが形成されている。この取外し用雌ねじ部５３ｅは、貫通孔５３ｂ内に埋設される例えばステンレス製のナットにて形成されている。この取外し用雌ねじ部５３ｅに、後述する内蓋開閉用工具１００を螺合することによって閉塞状態の内蓋３０を外枠１０内から容易に取り外すことができる。このように、取外し用雌ねじ部５３ｅをアルミニウム製の円筒状基部５３ａ内に埋設されるステンレス製のナットにて形成することによって取外し用雌ねじ部５３ｅの強度を向上させることができる。
【００３０】
また、締結ねじ挿通部５３の貫通孔５３ｂの先端側には、雌ねじ部４３を構成する円筒部４６を包囲する大径孔部５３ｃを有する円筒状基部５３ａより小径の案内筒部５３ｄが設けられている。この案内筒部５３ｄに設けられた大径孔部５３ｃと貫通孔５３ｂとの間には内側段部５７が形成されており、この内側段部５７は、雌ねじ部４３の円筒部４６の上端すなわち座金４８に係合可能に形成されている（図４参照）。また、案内筒部５３ｄと円筒状基部５３ａとの間には外側段部５８が形成されており、この外側段部５８は、上記底板３２に設けられた透孔３２ａ内に案内筒部５３ｄが挿入された際に、底板３２の上面に係合可能に形成されている（図４参照）。
【００３１】
上記締結ねじ６０は、偏平円板状の頭部６１とボルトパッキン６２を有し、かつ、外枠コーナーブロック４０の雌ねじ部４３に螺合する雄ねじ部６３を有するステンレス製のボルトにて形成されており、頭部６１の上面にはマイナス溝６１ａが形成されている。
【００３２】
なお、内蓋開閉用工具１００は、図１０に示すように、内枠コーナーブロック５０に形成された取外し用雌ねじ部５３ｅに螺合する雄ねじ部１０１を一端部に有する主ねじ軸１０２の他端部にハンドル軸１０３を直交状に接合した略Ｔ字状工具にて形成されており、ハンドル軸１０３の一端部に、締結ねじ６０の頭部６１に設けられたマイナス溝６１ａに係合する係合爪１０４が形成されている。
【００３３】
上記のように構成される外枠１０に内蓋３０を閉塞するには、まず、外枠１０内に内蓋３０を嵌め込み、次に、締結ねじ６０を内枠コーナーブロック５０に設けられた締結ねじ挿通部５３の貫通孔５３ｂ内を挿通し、内蓋開閉用工具１００の係合爪１０４を用いて外枠コーナーブロック４０に設けられた雌ねじ部４３に螺合（締結）して、内蓋３０によって外枠１０内を閉塞する（図１及び図１０（ａ）参照）。この状態において、締結ねじ６０の頭部６１は、締結ねじ挿通部５３に設けられた大径孔部５３ｃ内に収容されるので、化粧カバー３７と同一平面上に位置する。また、外枠１０内に内蓋３０を閉塞した状態では、図１及び図４に示すように、内蓋３０の内枠材２１に設けられた載置段部２５が外枠１０の外枠材１１に設けられた内蓋載置段部１３上に載置されると共に、垂下片２６の下端部がパッキンＰに圧接される。したがって、内蓋３０の荷重を外枠１０によって支持した状態で気水密性すなわち防水性及び防臭性の維持を図ることができる。
【００３４】
内蓋３０を開放する場合は、図１０（ｂ）に示すように、まず、締結ねじ６０と雌ねじ部４３との螺合（締結）状態を解除して締結ねじ６０を取り外す。次に、図１０（ｃ）に示すように、内蓋開閉用工具１００の主ねじ軸１０２に設けられた雄ねじ部１０１を内枠コーナーブロック５０に形成された取外し用雌ねじ部５３ｅに螺合させてねじ込む。これにより、雄ねじ部１０１の先端が外枠コーナーブロック４０の雌ねじ部４３（具体的には、座金４８）に当接されて、内蓋３０が強制的に浮き上がる。この状態で、図１０（ｄ）に示すように、内蓋開閉用工具１００を引き上げることによって内蓋３０を外枠１０内から取り外す。したがって、外枠１０と内蓋３０との間にゴミや砂利等が詰まっても内蓋３０を外枠１０内から容易に取り外すことができる。
【００３５】
◎第二実施形態
図１１は、この発明の床点検口の第二実施形態の要部拡大断面図、図１２は、第二実施形態の要部断面斜視図である。
【００３６】
第二実施形態は、締結ねじを内蓋３０から取り外さずに内蓋３０の開閉を可能にした場合である。すなわち、第二実施形態の床点検口は、内枠コーナーブロック５０Ａの水平片５２に設けられた締結ねじ挿通部５３Ａに、外枠コーナーブロック４０Ａの水平片４２の下面に垂下された円筒部４６Ａに設けられた雌ねじ部４３Ａより小径の係止孔部９１を有する貫通孔９０と、この貫通孔９０の上端開口部に連なる開口凹部９２とが設けられている。また、締結ねじ６０Ａに、貫通孔９０及び係止孔部９１内を挿通する軸部６５と、この軸部６５の先端に設けられて雌ねじ部４３に螺合可能であって係止孔部９１より大径の雄ねじ部６６と、軸部６５の基端に設けられて開口凹部９２内に収容可能な六角穴付き頭部６７とが設けられている。なお、雌ねじ部４３Ａは、円筒状部４６Ａ内に埋設されたステンレス製のナットにて形成されている。
【００３７】
第二実施形態における内枠コーナーブロック５０Ａ及び外枠コーナーブロック４０Ａは、第一実施形態と同様にアルミニウム製鋳物にて形成されている。また、係止孔部９１は、内枠コーナーブロック５０Ａの貫通孔９０の下端開口部に固定ねじ（図示せず）によって固定されるステンレス製の座金９３にて形成されている。なお、内枠コーナーブロック５０Ａ及び外枠コーナーブロック４０Ａにおいて、その他の部分は、第一実施形態と同じであるので、同一部分には同一符号を付して、説明は省略する。
【００３８】
なお、第二実施形態において、内蓋３０の開閉用工具として、六角レンチ（図示せず）と内蓋取外し用工具２００を用いる以外は、外枠１０と内蓋３０の構造は第一実施形態と同じであるので、同一部分には同一符号を付して、説明は省略する。
【００３９】
なお、上記内蓋取外し用工具２００は、図１４に示すように、水平棒２０１と垂直棒２０２とをＴ字状に連結してなるハンドル２０３の垂直棒２０２の下端にコ字状金具２０４を連結してなり、コ字状金具２０４の下部水平片に、上記締結ねじ６０Ａの頭部６７に係止する係止スリット２０５を設けた構造となっている。
【００４０】
第二実施形態において、外枠１０に内蓋３０を閉塞するには、まず、外枠１０内に内蓋３０を嵌め込み、次に、六角レンチ（図示せず）を用いて内枠コーナーブロック５０Ａに予め組み込まれている締結ねじ６０Ａを外枠コーナーブロック４０Ａに設けられた雌ねじ部４３Ａに螺合（締結）して、内蓋３０によって外枠１０内を閉塞する（図１１及び図１２参照）。この状態において、締結ねじ６０Ａの頭部６７は、締結ねじ挿通部５３Ａに設けられた開口凹部９２内に収容されるので、化粧カバー３７と同一平面上に位置する。また、外枠１０内に内蓋３０を閉塞した状態では、図１１及び図１２に示すように、内蓋３０の内枠材２１に設けられた載置段部２５が外枠１０の外枠材１１に設けられた内蓋載置段部１３上に載置されると共に、垂下片２６の下端部がパッキンＰに圧接される。したがって、内蓋３０の荷重を外枠１０によって支持した状態で気水密性すなわち防水性及び防臭性の維持を図ることができる。
【００４１】
内蓋３０を開放する場合は、図１３に示すように、まず、六角レンチ（図示せず）を用いて締結ねじ６０Ａと雌ねじ部４３Ａとの螺合（締結）状態を解除して締結ねじ６０Ａを上方へ引き上げる。締結ねじ６０Ａと雌ねじ部４３Ａの螺合状態を解除していく途中で、図１１に二点鎖線で示すように、雄ねじ部６６の上端が座金９３に当接して、内蓋３０が強制的に浮き上がる。次に、図１４に示すように、引き上げられた締結ねじ６０Ａの頭部６７の下方に内蓋取外し用工具２００のコ字状金具２０４に設けられた係止スリット２０５を係止させた状態で、内蓋取外し用工具２００を引き上げると、雄ねじ部６６が係止孔部９１より大径であるから雄ねじ部６６が座金９３に係止（係合）された状態となり、更に、内蓋取外し用工具２００を引き上げることによって内蓋３０を外枠１０内から取り外す。したがって、外枠１０と内蓋３０との間にゴミや砂利等が詰まっても内蓋３０を容易に取り外すことができる。また、締結ねじ６０Ａを内蓋３０から取り外すことなく内蓋３０を開放することができるので、締結ねじ６０Ａが紛失する心配がない。
【００４２】
【発明の効果】
以上に説明したように、この発明は上記のように構成されているので、以下のような優れた効果が得られる。
【００４３】
（１）請求項１記載の発明によれば、角部固定部材に、隣接する枠材同士を直交状に枠組みすると共に、固定手段によって固定する平面視略Ｌ字状の固定壁片と、この固定壁片から水平方向に延在する水平片とを一体に形成することにより、荷重によって固定壁片が直角（９０度）より拡がる又は狭まる変形が生じないので、枠材の四辺形の直角を常に保つことができる。したがって、外枠及び内蓋の枠材の変形、ガタツキを防止することができると共に、内蓋の開閉を容易にすることができる。また、構成部材の削減が図れると共に、組立工数を削減して組立を容易にすることができる。
【００４４】
（２）請求項２記載の発明によれば、角部固定部材の固定壁片と枠材との当接面に、互いに係合して垂直方向の移動を規制する位置決め用段部を設けることにより、角部固定部材の固定壁片と枠材との組み付けを正確かつ容易にすることができるので、上記（１）に加えて更に組立作業を容易にすることができる。
【００４５】
（３）請求項３記載の発明によれば、内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より大径の取外し用雌ねじ部を設け、この取外し用雌ねじ部に、内蓋開閉用工具を螺合可能に形成することにより、締結ねじと雌ねじ部との螺合状態を解除して締結ねじを取り外した後、取外し用雌ねじ部に内蓋開閉用工具を螺合して、外枠内に嵌め込まれている内蓋を取り外して開放することができるので、上記（１）、（２）に加えて更に内蓋の開放を容易にすることができる。
【００４６】
（４）請求項４記載の発明によれば、内蓋の角部固定部材の水平片に、外枠の角部固定部材に設けられた雌ねじ部より小径の係止孔部を有する貫通孔と、この貫通孔の上端開口部に連なる開口凹部とを設け、締結ねじには、取付孔及び係止孔部内を挿通する軸部と、この軸部の先端に設けられて雌ねじ部に螺合可能であって係止孔部より大径の雄ねじ部と、軸部の基端に設けられて開口凹部内に収容可能な頭部とを設けることにより、締結ねじと雌ねじ部との螺合状態を解除して締結ねじを上方へ引き上げると、雄ねじ部が係止孔部の周縁に係合し、更に締結ねじを引き上げることにより、内蓋が外枠の上方に移動して開放することができるので、上記（１）、（２）に加えて更に内蓋の開放を容易にすることができる。また、締結ねじを内蓋から取り外すことなく内蓋を外枠の上方に移動して開放することができるので、締結ねじが紛失する心配がない。
【図面の簡単な説明】
【図１】この発明の床点検口の第一実施形態の取付状態を示す断面図である。
【図２】上記床点検口の要部を示す概略斜視図である。
【図３】上記床点検口の平面図（ａ）及び側面図（ｂ）である。
【図４】図３のＩ−Ｉ線に沿う拡大断面図である。
【図５】この発明における外枠と内蓋の要部の分解断面図である。
【図６】上記床点検口の一部を分解して示す斜視図である。
【図７】この発明における外枠の分解斜視図である。
【図８】この発明における内蓋の分解斜視図である。
【図９】この発明における外枠と内蓋を示す分解斜視図である。
【図１０】上記内蓋を開放する操作手順を示す要部斜視図である。
【図１１】この発明の床点検口の第二実施形態の要部拡大断面図である。
【図１２】第二実施形態の床点検口の要部断面斜視図である。
【図１３】第二実施形態における内蓋の開放前の状態を示す要部斜視図である。
【図１４】第二実施形態における内蓋の開放状態を示す要部斜視図である。
【符号の説明】
Ｆ床
２開口部
１０外枠
１１外枠材（枠材）
２０内枠
２１内枠材（枠材）
３０内蓋
４０外枠コーナーブロック（外枠角部固定部材）
４１固定壁片
４２水平片
４３，４３Ａ雌ねじ部
５０内枠コーナーブロック（内蓋角部固定部材）
５３，５３Ａ締結ねじ挿通部
５３ｂ貫通孔
６０，６０Ａ締結ねじ
６３雄ねじ部
６５軸部
６６雄ねじ部
６７頭部
７０ａ，７０ｂ，７０ｃ，７０ｄ位置決め用段部
８０固定ねじ（固定手段）
９０貫通孔
９１係止孔部
９２開口凹部
１００内蓋開閉用工具
２００内蓋取外し用工具[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor inspection port, and more particularly, a floor inspection port that can be fastened with an outer frame attached to an opening provided in the floor portion and an inner lid that is detachably fitted into the outer frame. It is about.
[0002]
[Prior art]
Conventionally, a frame material is framed in a quadrilateral shape and has an outer frame that is attached to an opening provided in the floor, and a frame material that is framed in a quadrilateral shape, and is detachably fitted into the outer frame via a packing. There is known a waterproof and deodorant floor inspection opening that can be fastened to an inner lid. In this type of floor inspection opening, in order to prevent rattling, corner fastening metal fittings that fasten butt corners between adjacent frame members of outer frame corners are used. In this case, the corner fastening bracket is clamped with a female screw part (nut) for fastening with a fastening bolt that can be screwed into a bolt insertion hole provided in the inner lid, and the lower edge of the frame material is regulated. Is a structure in which a folded piece is provided, and a screw inserted from the lower surface of the corner fastening bracket is screwed to the frame material, and a corner piece is used for assembling the frame material of the outer frame and the inner lid (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
No. 2-42817 (page 2, column 3, line 21 to page 4, column 4, line 3, page 2, column 4, lines 33 to 44, FIG. 4)
[0004]
[Problems to be solved by the invention]
However, in this type of conventional floor inspection port, since the corner fastening bracket embraces the lower edge of the frame material of the outer frame, the perpendicularity of the adjacent frame material in the outer frame can be regulated. The frame could be deformed. When the frame is deformed, there is a problem that the opening and closing of the inner lid is hindered. In addition, if dust or gravel is clogged between the outer frame and the inner lid, there is a problem that it takes time to open the closed inner lid. Moreover, in the conventional floor inspection port, since it is necessary to use a corner piece in addition to the corner fastening bracket, there is a problem that the number of components of the constituent members increases and the assembly process becomes complicated.
[0005]
The present invention has been made in view of the above circumstances, and prevents deformation and rattling of the frame material of the outer frame and the inner lid, facilitates opening and closing of the inner lid, and reduces the number of constituent members and assembly steps. It is an object to provide a floor inspection port that facilitates the above.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a floor inspection port according to the present invention includes a frame member framed in a quadrilateral shape, an outer frame attached to an opening provided in the floor portion, a frame material framed in a quadrilateral shape, and these A floor inspection port comprising a bottom plate fixed to a lower end portion of the frame member and detachably fitted in the outer frame, wherein the outer frame and the inner lid are formed by connecting the adjacent frame members to each other. A corner fixing member that integrally forms a fixed wall piece that is substantially L-shaped in plan view and that is fixed by a fixing means and a horizontal piece that extends in a horizontal direction from the fixed wall piece. The corner frame fixing member of the outer frame includes a female thread portion on the horizontal piece, and the corner fixing member of the inner lid includes a cylindrical base portion that has a through hole through which a fastening screw can be inserted. A fastening screw insertion portion is provided, and is provided at the tip side of the fastening screw insertion portion. , Together with the guide tube portion insertable within a hole provided in the bottom plate is provided, the guide cylinder section and the Circle An outer stepped portion that can be engaged with the upper surface of the bottom plate is formed between the cylindrical base portion, and a fastening screw that is inserted through the through hole is a female screw provided on a horizontal piece of a corner fixing member of the outer frame. It is formed so that it can be screwed onto the part (Claim 1).
[0007]
In this invention, it is preferable to provide a positioning step portion that engages with each other and restricts vertical movement on the contact surface between the fixed wall piece and the frame member of the corner fixing member.
[0008]
Further, the horizontal piece of the corner fixing member of the inner lid is provided with a female screw portion for removal having a larger diameter than the female screw portion provided on the corner fixing member of the outer frame, and the inner lid opening and closing portion is provided on the female screw portion for removal. A through-hole having a locking hole portion smaller in diameter than a female screw portion provided on a corner fixing member of the outer frame, on a horizontal piece of the corner fixing member of the inner lid, or formed so that the tool can be screwed. An opening recess connected to the upper end opening of the through-hole, and the fastening screw includes a shaft portion that passes through the through-hole and the locking hole portion, and is provided at the tip of the shaft portion to the female screw portion. It is preferable to provide a male screw portion that can be screwed and has a diameter larger than that of the locking hole portion, and a head portion that is provided at the base end of the shaft portion and can be accommodated in the opening recess. ).
[0009]
According to the first aspect of the present invention, the frame member that is adjacent to the corner portion fixing member is orthogonally framed, and is fixed by the fixing means and is substantially L-shaped (substantially orthogonal) in a plan view. The fixing piece is formed integrally with a horizontal piece extending in the horizontal direction, and a fastening screw that is inserted through a through hole provided in the horizontal piece of the corner fixing member of the inner lid is fixed to the corner of the outer frame. By forming it so that it can be screwed into the female thread provided on the horizontal piece of the member, the fixed wall piece does not deform or expand more than a right angle (90 degrees) due to the load. Can keep.
[0010]
According to the second aspect of the present invention, by providing the positioning step portion that engages each other and restricts the movement in the vertical direction on the contact surface between the fixed wall piece of the corner portion fixing member and the frame member, Assembly of the fixed wall piece of the part fixing member and the frame member can be made accurately and easily.
[0011]
According to the invention of claim 3, the horizontal piece of the corner fixing member of the inner lid is provided with the female screw portion for removal larger in diameter than the female screw portion provided on the corner fixing member of the outer frame, and this female screw for removal The inner lid opening / closing tool is formed in the portion so that it can be screwed together. After the screwed state between the fastening screw and the female screw portion is released and the fastening screw is removed, the inner lid opening / closing tool is attached to the removal female screw portion. By screwing, the inner lid fitted in the outer frame can be removed and opened.
[0012]
According to the fourth aspect of the invention, the horizontal piece of the corner fixing member of the inner lid has a through hole having a locking hole portion smaller in diameter than the female screw portion provided in the corner fixing member of the outer frame, and this penetration An opening recess that is continuous with the upper end opening of the hole is provided, the fastening screw has a shaft portion that passes through the mounting hole and the locking hole portion, and is provided at the tip of the shaft portion and can be screwed into the female screw portion. By providing a male screw part larger in diameter than the locking hole and a head provided at the base end of the shaft part and accommodated in the opening recess, the screwed state between the fastening screw and the female screw part is released. When the fastening screw is pulled upward, the male screw part engages with the periphery of the locking hole part, and by further pulling up the fastening screw, the inner lid can be moved above the outer frame and opened.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Below, the floor inspection port of this invention is demonstrated in detail based on an accompanying drawing.
◎ First embodiment
FIG. 1 is a sectional view showing a mounting state of a first embodiment of a floor inspection port according to the present invention, FIG. 2 is a schematic perspective view showing a main part of the floor inspection port, and FIG. 3 is a plan view of the floor inspection port. FIGS. 4A and 4B are enlarged cross-sectional views taken along line II of FIG.
[0014]
As shown in FIG. 1, the floor inspection port 1 has an outer frame 10 attached in a substantially rectangular opening 2 provided in a floor F portion, and an inner frame detachably fitted in the outer frame 10. The main part is comprised with the inner cover 30 which comprises the frame 20, and the outer frame 10 and the inner cover 30 are formed with the fastening screw 60 so that fastening is possible. In addition, the clearance gap between the outer frame 10 and the inner frame 20 is sealed with the packing P which is a sealing member, and waterproofness and deodorizing property are achieved.
[0015]
As shown in FIGS. 4 to 7 and 9, the outer frame 10 is formed in a quadrilateral shape by framing four frame members, that is, the outer frame member 11, and is fixed at each corner. The outer frame material 11 is bonded and fixed orthogonally by a member 40 (hereinafter referred to as an outer frame corner block 40).
[0016]
The outer frame member 11 is formed of, for example, an extruded shape made of an aluminum alloy, and has a mounting flange having a packing fitting groove 14 on the inner side of the lower end portion of the vertical base portion 12 via an inner lid mounting step portion 13. A portion 15 is extended, and upper and lower engaging ridges 17a and 17b that are parallel to each other and have engaging grooves 16 for anchors project from the upper and lower ends of the outer surface of the vertical base portion 12. Has been. In this case, the upper surface of the lower engaging projection 17b forms a positioning step 70a that engages with a positioning step 70b formed on the fixed wall piece 41 of the outer frame corner block 40 described later. Further, at the upper end of the vertical base portion 12, for example, an ant groove 12 a into which the ant portion 18 a of the decorative frame member 18 made of stainless steel is inserted is formed. Note that the upper side of the inner lid placing step 13 on the inner side surface of the vertical base 12 is formed gradually thicker toward the inner lid placing step 13 side. The outer frame material 11 formed in this way is fixed to the outer frame corner block 40 in an orthogonal state in which the ends are cut at 45 degrees and the adjacent members are butted and joined. The decorative member 18 is also cut at an end of 45 degrees, and the adjacent members are butted and joined in an orthogonal shape. In this way, the hollow cylindrical packing P is fitted into the packing fitting groove 14 of the quadrilateral outer frame 10 whose corners are fixed by the outer frame corner block 40.
[0017]
As shown in FIGS. 4 to 7 and 9, the outer frame corner block 40 frames the outer frame members 11 in an orthogonal shape and is fixed in a substantially L shape in plan view that is fixed by a fixing means such as a fixing screw 80 ( The fixed wall piece 41 (substantially orthogonal) and the horizontal piece 42 extending in the horizontal direction from the lower end of the fixed wall piece 41 are integrally formed, and the female screw portion 43 is integrally formed on the horizontal piece 42. For example, it is formed of an aluminum casting.
[0018]
In this case, on the inner surface of the fixed wall piece 41, a plurality of reinforcing vertical ribs 44 (four cases are shown in the drawing) parallel to each other from the upper end toward the vicinity of the lower end are projected. The lower end surfaces of these vertical ribs 44 form a positioning step 70 b that engages with the positioning step 70 a of the outer frame member 11. Further, the vertical rib 44 is provided with a screw hole 45, and the outer frame member 11 is screwed into the screw hole 45 by screwing a fixing screw 80 inserted through the mounting hole 19 formed in the outer frame member 11. It can be fixed to the fixed wall piece 41.
[0019]
To assemble the outer frame 10, the adjacent outer frame member 11 is attached to the outer frame corner block 40 so that the positioning step 70 a of the outer frame member 11 and the positioning step 70 b of the outer frame corner block 40 are engaged with each other. It is set on the inner surface of the fixed wall piece 41, that is, butt-joined. In this state, the outer frame member 11 and the outer frame corner block 40 are restricted from moving in the vertical direction. In this state, the fixing screws 80 inserted into the mounting holes 19 provided in the outer frame member 11 are screwed into the screw holes 45 provided in the outer frame corner block 40 so that the adjacent outer frame members 11 are connected to each other. Fix the frame perpendicularly.
[0020]
In this way, the outer frame material 11 at each corner of the outer frame 10 extends horizontally from the fixed wall piece 41 having a substantially L-shape (substantially orthogonal) in plan view and the lower end of the fixed wall piece 41. It is fixed by the outer frame corner block 40 integrally formed with the horizontal piece 42. Therefore, since the fixed wall piece 41 does not expand or narrow from a right angle (90 degrees) due to the load, the right-angle state of the quadrilateral of the outer frame member 11 can always be maintained.
[0021]
Moreover, the said internal thread part 43 is formed with the nut made from stainless steel embed | buried under the internal peripheral surface of the cylindrical part 46 which protrudes on the horizontal piece 42, as shown in FIG.1 and FIG.4. A stainless washer 48 is fixed to the upper end of the cylindrical portion 46 via a double-sided adhesive tape 47. In this manner, the internal thread portion 43 is formed by a stainless steel nut embedded in the aluminum cylindrical portion 46, and a stainless steel washer 48 is attached to the upper end of the cylindrical portion 46, whereby an inner lid to be described later is provided. When the opening / closing tool 100 is used, it is possible to prevent the tip of the male screw portion 101 of the inner lid opening / closing tool 100 from coming into contact and being scraped.
[0022]
In order to attach the outer frame 10 configured as described above to the opening 2 provided in the floor F portion, first, the anchor 3 is engaged with the outer frame 10. Next, as shown in FIG. 1, the outer frame 10 is installed in the opening 2, and the reinforcing bar 4 embedded in advance and the anchor 3 are welded. Then, mortar is filled around the outer frame 10, and the surface is finished with tiles or the like. In this case, 2 to 3 anchors 3 are appropriately used depending on the length of the outer frame member 11 on each side.
[0023]
On the other hand, as shown in FIGS. 4 to 6, 8, and 9, the inner lid 30 includes an inner frame 20 that is formed by framing four frame members, that is, an inner frame member 21 into a quadrilateral shape, and an inner frame 20. A corner fixing member 50 (hereinafter referred to as an inner frame corner block 50) which is disposed at each corner of the inner frame 20 and which joins and fixes adjacent inner frame members 21 orthogonally, and a fixing means such as a lower end of the inner frame 20. A rectangular bottom plate 32 fixed by a rivet 31, and a plurality of (for example, two cases shown in the drawings) cross-sectional hats that are fixed to the opposing inner frame member 21 and the bottom plate 32 by fixing means such as countersunk machine screws 33. Steel reinforcing member 34, mortar 35 filled in a space formed by inner frame 20, bottom plate 32 and reinforcing member 34, and outer frame 10 laid on the surface of mortar 35 were used. Consists of tiles 36 similar to tiles To have.
[0024]
The inner frame member 21 is formed of an extruded shape made of, for example, an aluminum alloy. An inward flange portion 24 extends horizontally from the lower end of the vertical base portion 22 to the inward side. A hanging piece 26 is suspended from the bottom surface of the base end via a mounting step 25, and a positioning step provided on an inner frame corner block 50 described later is provided at the upper end of the inner surface of the vertical base 22. A bulging head 23 is formed via a positioning step 70c that engages with 70d, and an ant 28a provided on, for example, a stainless steel decorative frame member 28 is fitted to the upper end of the bulging head 23. The dovetail groove 23a to be inserted is formed. The inner frame material 21 formed in this way is fixed by the inner frame corner block 50 in an orthogonal state in which the ends are cut at 45 degrees and the adjacent members are butted and joined. Note that the end of the decorative member 28 is also cut at 45 degrees, and the adjacent members are butted and joined orthogonally.
[0025]
As shown in FIGS. 4 to 6, 8, and 9, the inner frame corner block 50 frames the inner frame materials 21 in an orthogonal shape, and fixes the inner frame material 21 by fixing means, for example, fixing screws 80. The fixed wall piece 51 having a substantially L shape (substantially orthogonal) in plan view and the horizontal piece 52 extending in the horizontal direction from the upper end of the fixed wall piece 51 are integrally formed, and the tip of the horizontal piece 52 A cylindrical fastening screw insertion portion 53 protruding from the side lower surface is formed of, for example, an aluminum casting integrally formed.
[0026]
In this case, the fixing wall piece 51 is provided with a screw hole 54, and the fixing screw 80 that passes through the mounting hole 27 formed in the inner frame member 21 is screwed (fastened) to the screw hole 54. Adjacent inner frame members 21 are bonded and fixed in an orthogonal shape. Further, an upward positioning step portion 70 d that engages with a downward positioning step portion 70 c provided on the inner frame member 21 is formed on the upper end side of the outer surface of the fixed wall piece 51. Further, at two locations on the outer peripheral side of the fastening screw insertion portion 53 in the horizontal piece 52, mounting portions 56 having mounting holes 55 for mounting the decorative cover 37 are projected. The decorative cover 37 is formed of a rectangular plate-shaped member made of stainless steel. The insertion guide hole 38 of the fastening screw 60 is formed in the center of the decorative cover 37, and the attachment portion 56 is provided in two places on the lower surface. A mounting screw 39 penetrating the mounting hole 55 is projected by a fixing means such as welding. The decorative cover 37 formed in this way has the top surface of the inner frame corner block 50 by screwing (fastening) the nut 39a to the projecting portion with the mounting screw 39 passing through the mounting hole 55 of the mounting portion 56. To be attached. The decorative cover 37 attached to the upper surface of the inner frame corner block 50 and the decorative member 28 attached to the upper end of the inner frame member 21 are located on the same plane.
[0027]
To assemble the inner frame 20, the adjacent inner frame member 21 is attached to the inner frame corner block 50 so that the positioning step 70 c of the inner frame member 21 and the positioning step 70 d of the inner frame corner block 50 are engaged with each other. The outer wall of the fixed wall piece 51 is set, that is, butt-joined. In this state, the inner frame member 21 and the inner frame corner block 50 are restricted from moving in the vertical direction. In this state, the fixing screws 80 inserted into the mounting holes 27 provided in the inner frame material 21 are screwed into the screw holes 54 provided in the inner frame corner block 50 to thereby connect the adjacent inner frame materials 21 to each other. Fix the frame perpendicularly.
[0028]
In this way, the inner frame member 21 at each corner of the inner frame 20 extends horizontally from the fixed wall piece 51 that is substantially L-shaped (substantially orthogonal) in plan view and the upper end of the fixed wall piece 51. It is fixed by the inner frame corner block 50 integrally formed with the horizontal piece 52. Therefore, since the fixed wall piece 51 does not expand or narrow from a right angle (90 degrees) due to the load, the right-angle state of the quadrilateral of the inner frame member 21 can always be maintained.
[0029]
Further, as shown in FIGS. 1 and 4, the fastening screw insertion portion 53 can be inserted with a cylindrical base portion 53 a raised on the lower surface on the front end side of the horizontal piece 52 and a fastening screw 60 provided on the cylindrical base portion 53 a. A through hole 53b is formed, and on the upper side of the through hole 53b, a female screw portion 53e for removal having a larger diameter than the female screw portion 43 provided in the outer frame corner block 40 is formed. The detaching female thread portion 53e is formed of, for example, a stainless nut embedded in the through hole 53b. The closed inner lid 30 can be easily detached from the outer frame 10 by screwing an inner lid opening / closing tool 100 described later into the detachable female thread portion 53e. Thus, the strength of the detachable female thread portion 53e can be improved by forming the detachable female thread portion 53e with a stainless steel nut embedded in the aluminum cylindrical base portion 53a.
[0030]
In addition, a guide cylinder portion 53d having a smaller diameter than the cylindrical base portion 53a having a large-diameter hole portion 53c surrounding the cylindrical portion 46 constituting the female screw portion 43 is provided on the distal end side of the through hole 53b of the fastening screw insertion portion 53. ing. An inner stepped portion 57 is formed between the large diameter hole portion 53c provided in the guide tube portion 53d and the through hole 53b. The inner stepped portion 57 is the upper end of the cylindrical portion 46 of the female screw portion 43, that is, It is formed so as to be engageable with the washer 48 (see FIG. 4). Further, an outer stepped portion 58 is formed between the guide tube portion 53d and the cylindrical base portion 53a. The outer stepped portion 58 has a guide tube portion 53d in a through hole 32a provided in the bottom plate 32. When inserted, it is formed to be engageable with the upper surface of the bottom plate 32 (see FIG. 4).
[0031]
The fastening screw 60 is formed of a stainless steel bolt having a flat disk-shaped head portion 61 and a bolt packing 62 and having a male screw portion 63 screwed into the female screw portion 43 of the outer frame corner block 40. A negative groove 61 a is formed on the upper surface of the head 61.
[0032]
As shown in FIG. 10, the inner lid opening / closing tool 100 has the other end of the main screw shaft 102 having, at one end, a male screw portion 101 that engages with a removal female screw portion 53 e formed in the inner frame corner block 50. This is formed by a substantially T-shaped tool in which a handle shaft 103 is orthogonally joined to a portion, and is engaged with a minus groove 61 a provided on a head 61 of a fastening screw 60 at one end of the handle shaft 103. A claw 104 is formed.
[0033]
In order to close the inner lid 30 to the outer frame 10 configured as described above, first, the inner lid 30 is fitted into the outer frame 10, and then a fastening screw 60 is provided in the inner frame corner block 50. The inner lid is inserted into the through hole 53b of the screw insertion portion 53 and is screwed (fastened) to the female screw portion 43 provided in the outer frame corner block 40 using the engagement claw 104 of the inner lid opening / closing tool 100. The inside of the outer frame 10 is closed by 30 (see FIG. 1 and FIG. 10A). In this state, the head 61 of the fastening screw 60 is accommodated in the large-diameter hole 53 c provided in the fastening screw insertion portion 53, and thus is positioned on the same plane as the decorative cover 37. Further, in a state where the inner lid 30 is closed in the outer frame 10, as shown in FIGS. 1 and 4, the mounting step portion 25 provided on the inner frame material 21 of the inner lid 30 is the outer frame of the outer frame 10. While being placed on the inner lid placing step portion 13 provided on the material 11, the lower end portion of the hanging piece 26 is pressed against the packing P. Therefore, it is possible to maintain the airtightness, that is, the waterproof property and the deodorant property while the load of the inner lid 30 is supported by the outer frame 10.
[0034]
When opening the inner lid 30, as shown in FIG. 10B, first, the screwed (fastened) state between the fastening screw 60 and the female screw portion 43 is released and the fastening screw 60 is removed. Next, as shown in FIG. 10 (c), the male screw portion 101 provided on the main screw shaft 102 of the inner lid opening / closing tool 100 is screwed into the removal female screw portion 53 e formed on the inner frame corner block 50. Screw in. Thereby, the front-end | tip of the external thread part 101 is contact | abutted to the internal thread part 43 (specifically washer 48) of the outer frame corner block 40, and the inner cover 30 is lifted forcibly. In this state, as shown in FIG. 10 (d), the inner lid 30 is removed from the outer frame 10 by pulling up the inner lid opening / closing tool 100. Therefore, even if dust, gravel, or the like is clogged between the outer frame 10 and the inner lid 30, the inner lid 30 can be easily removed from the outer frame 10.
[0035]
◎ Second embodiment
FIG. 11 is an enlarged cross-sectional view of the main part of the second embodiment of the floor inspection port according to the present invention, and FIG. 12 is a cross-sectional perspective view of the main part of the second embodiment.
[0036]
In the second embodiment, the inner lid 30 can be opened and closed without removing the fastening screw from the inner lid 30. That is, the floor inspection port according to the second embodiment has a cylindrical portion 46A suspended from the fastening screw insertion portion 53A provided in the horizontal piece 52 of the inner frame corner block 50A and the lower surface of the horizontal piece 42 of the outer frame corner block 40A. A through hole 90 having a locking hole portion 91 having a smaller diameter than the female screw portion 43 </ b> A provided at the upper end, and an opening concave portion 92 connected to the upper end opening portion of the through hole 90 are provided. Further, a shaft portion 65 inserted into the fastening screw 60A through the through-hole 90 and the locking hole portion 91, and provided at the tip of the shaft portion 65, can be screwed into the female screw portion 43, and the locking hole portion 91. A male screw portion 66 having a larger diameter and a head portion 67 with a hexagonal hole that is provided at the proximal end of the shaft portion 65 and can be accommodated in the opening recess 92 are provided. The female screw portion 43A is formed of a stainless nut embedded in the cylindrical portion 46A.
[0037]
The inner frame corner block 50A and the outer frame corner block 40A in the second embodiment are formed of an aluminum casting as in the first embodiment. Further, the locking hole portion 91 is formed of a stainless washer 93 that is fixed to a lower end opening portion of the through hole 90 of the inner frame corner block 50A by a fixing screw (not shown). In addition, in the inner frame corner block 50A and the outer frame corner block 40A, other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.
[0038]
In addition, in 2nd embodiment, the structure of the outer frame 10 and the inner cover 30 is 1st embodiment except using the hexagon wrench (not shown) and the tool 200 for inner cover removal as an opening / closing tool of the inner cover 30. Therefore, the same parts are denoted by the same reference numerals, and the description thereof is omitted.
[0039]
As shown in FIG. 14, the inner lid removing tool 200 has a U-shaped bracket 204 at the lower end of a vertical bar 202 of a handle 203 formed by connecting a horizontal bar 201 and a vertical bar 202 in a T shape. The locking slit 205 which locks to the head 67 of the said fastening screw 60A was provided in the lower horizontal piece of the U-shaped metal fitting 204 by connecting.
[0040]
In the second embodiment, in order to close the inner lid 30 on the outer frame 10, first, the inner lid 30 is fitted into the outer frame 10, and then the inner frame corner block 50 </ b> A using a hexagon wrench (not shown). The fastening screw 60A previously incorporated in the outer frame corner block 40A is screwed (fastened) to the female screw portion 43A, and the inside of the outer frame 10 is closed by the inner lid 30 (see FIGS. 11 and 12). . In this state, the head 67 of the fastening screw 60 </ b> A is accommodated in the opening recess 92 provided in the fastening screw insertion portion 53 </ b> A, and thus is positioned on the same plane as the decorative cover 37. Further, in a state where the inner lid 30 is closed in the outer frame 10, as shown in FIGS. 11 and 12, the mounting step portion 25 provided on the inner frame material 21 of the inner lid 30 is the outer frame of the outer frame 10. While being placed on the inner lid placing step portion 13 provided on the material 11, the lower end portion of the hanging piece 26 is pressed against the packing P. Therefore, it is possible to maintain the airtightness, that is, the waterproof property and the deodorant property while the load of the inner lid 30 is supported by the outer frame 10.
[0041]
When the inner lid 30 is opened, as shown in FIG. 13, first, a hexagon wrench (not shown) is used to release the screwed (fastened) state between the fastening screw 60A and the female screw portion 43A, thereby fastening screw 60A. Pull up upward. In the middle of releasing the screwed state of the fastening screw 60A and the female screw portion 43A, the upper end of the male screw portion 66 comes into contact with the washer 93 as shown in FIG. Float up. Next, as shown in FIG. 14, in a state where the locking slit 205 provided in the U-shaped bracket 204 of the inner lid removal tool 200 is locked below the head 67 of the pulled-up fastening screw 60A. When the inner lid removal tool 200 is pulled up, the male screw portion 66 has a larger diameter than the locking hole portion 91, so that the male screw portion 66 is locked (engaged) with the washer 93. The inner lid 30 is removed from the outer frame 10 by pulling up the tool 200. Therefore, even if dust or gravel is clogged between the outer frame 10 and the inner lid 30, the inner lid 30 can be easily removed. Further, since the inner lid 30 can be opened without removing the fastening screw 60A from the inner lid 30, there is no fear that the fastening screw 60A is lost.
[0042]
【The invention's effect】
As described above, since the present invention is configured as described above, the following excellent effects can be obtained.
[0043]
(1) According to the first aspect of the invention, the frame member that is adjacent to the corner portion fixing member is orthogonally framed and fixed by the fixing means, and the fixed wall piece having a substantially L shape in plan view, By forming the horizontal piece extending in a horizontal direction from the fixed wall piece integrally, the fixed wall piece is not deformed to expand or narrow from a right angle (90 degrees) due to the load, so the right angle of the quadrilateral of the frame member is increased. Can always keep. Therefore, the frame material of the outer frame and the inner lid can be prevented from being deformed and rattled, and the inner lid can be easily opened and closed. Further, the number of constituent members can be reduced, and the number of assembling steps can be reduced to facilitate assembly.
[0044]
(2) According to the invention described in claim 2, the positioning step portion that engages with each other and restricts the movement in the vertical direction is provided on the contact surface between the fixed wall piece of the corner portion fixing member and the frame member. As a result, the assembly of the fixed wall piece of the corner portion fixing member and the frame member can be performed accurately and easily, so that the assembly operation can be further facilitated in addition to the above (1).
[0045]
(3) According to the invention of claim 3, the horizontal piece of the corner fixing member of the inner lid is provided with the female screw portion for removal having a larger diameter than the female screw portion provided on the corner fixing member of the outer frame. By forming the inner lid opening / closing tool so that it can be screwed into the female screw part for removal, the screwed state of the fastening screw and female screw part is released and the fastening screw is removed, and then the inner lid is opened and closed to the female screw part for removal. Since the inner lid fitted in the outer frame can be removed by opening the tool for engagement and opened, the opening of the inner lid can be further facilitated in addition to the above (1) and (2). it can.
[0046]
(4) According to the invention described in claim 4, the horizontal piece of the corner fixing member of the inner lid has a through hole having a locking hole portion having a smaller diameter than the female screw portion provided in the corner fixing member of the outer frame. An opening recess connected to the upper end opening of the through hole is provided. The fastening screw has a shaft portion that passes through the mounting hole and the locking hole portion, and is provided at the tip of the shaft portion and can be screwed into the female screw portion. Thus, by providing a male screw portion having a diameter larger than that of the locking hole portion and a head portion that is provided at the base end of the shaft portion and can be accommodated in the opening concave portion, the screwed state between the fastening screw and the female screw portion is achieved. When it is released and the fastening screw is pulled upward, the male screw part engages with the periphery of the locking hole part, and the inner lid can be moved upward and opened by lifting the fastening screw. In addition to the above (1) and (2), the opening of the inner lid can be further facilitated. Further, since the inner lid can be moved upward and released from the outer frame without removing the fastening screw from the inner lid, there is no fear that the fastening screw is lost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a mounting state of a first embodiment of a floor inspection port according to the present invention.
FIG. 2 is a schematic perspective view showing a main part of the floor inspection port.
FIG. 3 is a plan view (a) and a side view (b) of the floor inspection port.
4 is an enlarged cross-sectional view taken along the line II of FIG.
FIG. 5 is an exploded cross-sectional view of main parts of an outer frame and an inner lid in the present invention.
FIG. 6 is an exploded perspective view showing a part of the floor inspection port.
FIG. 7 is an exploded perspective view of an outer frame in the present invention.
FIG. 8 is an exploded perspective view of the inner lid in the present invention.
FIG. 9 is an exploded perspective view showing an outer frame and an inner lid in the present invention.
FIG. 10 is a perspective view showing a main part of an operation procedure for opening the inner lid.
FIG. 11 is an enlarged sectional view of a main part of a second embodiment of the floor inspection port according to the present invention.
FIG. 12 is a cross-sectional perspective view of a main part of a floor inspection port according to a second embodiment.
FIG. 13 is a perspective view of a main part showing a state before the inner lid is opened in the second embodiment.
FIG. 14 is a perspective view of relevant parts showing an open state of an inner lid in a second embodiment.
[Explanation of symbols]
F floor
2 opening
10 Outer frame
11 Outer frame material (frame material)
20 Inner frame
21 Inner frame material (frame material)
30 Inner lid
40 Outer frame corner block (outer frame corner fixing member)
41 Fixed wall pieces
42 horizontal pieces
43, 43A Female thread
50 Inner frame corner block (Inner lid corner fixing member)
53, 53A Fastening screw insertion part
53b Through hole
60,60A Fastening screw
63 Male thread
65 Shaft
66 Male thread
67 head
70a, 70b, 70c, 70d Positioning step
80 Fixing screw (fixing means)
90 Through hole
91 Locking hole
92 Opening recess
100 Inner lid opening / closing tool
200 Inner lid removal tool

Claims

An outer frame that is attached to an opening provided in the floor by framing the frame material in a quadrilateral shape, a frame material that is framed in a quadrilateral shape, and a bottom plate that is fixed to the lower end of these frame materials, In the floor inspection port consisting of an inner lid detachably fitted in the outer frame,
The outer frame and the inner lid frame the adjacent frame members in an orthogonal shape, and have a substantially L-shaped fixed wall piece to be fixed by a fixing means, and extend horizontally from the fixed wall piece. A corner fixing member formed integrally with a horizontal piece;
The corner fixing member of the outer frame is provided with a female thread portion on the horizontal piece,
The corner fixing member of the inner lid is provided with a fastening screw insertion portion having a cylindrical base portion that provides a through-hole through which a fastening screw can be inserted into the horizontal piece, and the distal end side of the fastening screw insertion portion has the above-mentioned with the guide tube portion insertable within a hole provided in the bottom plate is provided, between the said guide cylinder section and the circular cylindrical base portion, an outer step portion engageable with the upper surface of the bottom plate is formed ,
A floor inspection port, wherein a fastening screw for inserting the through-hole is formed so as to be able to be screwed into a female screw portion provided on a horizontal piece of a corner fixing member of the outer frame.

In the floor inspection opening according to claim 1,
A floor inspection port comprising a positioning step portion that engages with each other to restrict vertical movement on a contact surface between a fixed wall piece and a frame member of the corner portion fixing member.

In the floor inspection opening according to claim 1 or 2,
A horizontal piece of the corner fixing member of the inner lid is provided with a female screw portion for removal larger in diameter than the female screw portion provided on the corner fixing member of the outer frame, and an inner lid opening / closing tool is attached to the female screw portion for removal. A floor inspection port characterized by being formed so as to be screwable.

In the floor inspection opening according to claim 1 or 2,
In the horizontal piece of the corner fixing member of the inner lid, a through hole having a locking hole smaller in diameter than the female screw provided in the corner fixing member of the outer frame, and an opening recess connected to the upper end opening of the through hole And
The fastening screw includes a shaft portion that is inserted through the through hole and the locking hole portion, and a male screw that is provided at the tip of the shaft portion and can be screwed into the female screw portion and has a larger diameter than the locking hole portion. A floor inspection port characterized by comprising a portion and a head portion provided at the base end of the shaft portion and capable of being accommodated in the opening recess.