JP4651071B2

JP4651071B2 - Floor inspection port mounting structure

Info

Publication number: JP4651071B2
Application number: JP2001096704A
Authority: JP
Inventors: 辰夫庄司; 慎二郎大木
Original assignee: Naka Corp
Current assignee: Naka Corp
Priority date: 2001-03-29
Filing date: 2001-03-29
Publication date: 2011-03-16
Anticipated expiration: 2021-03-29
Also published as: JP2002294999A

Description

【０００１】
【発明の属する技術分野】
この発明は、床点検口の取付構造に関するもので、更に詳細には、床部に設けられた開口部に取り付けられる床点検口の取付構造に関するものである。
【０００２】
【従来の技術】
一般に、床点検口は、床部に設けられる開口部に取り付けられる外枠と、この外枠内に着脱可能に嵌合する内枠と、この内枠を周縁に装着してなる開閉用の蓋体とで主に構成されている。
【０００３】
従来、床部に床点検口を取り付けるには、例えば図１３に示すように、外枠１に設けられた上フランジ１ａを、床部Ｆに設けられた開口部２の縁部上面に載置し、外枠１に設けられた下フランジ１ｂを、開口部２の下部に配置された根太２ａに固定用木ねじ２ｃで固定された副根太２ｂ上に載置し、そして、下フランジ１ｂに穿設された貫通孔１ｃを貫通する取付用木ねじ１ｄを副根太２ｂにねじ止めして取り付けていた。
【０００４】
ところが近年では、従来のように根太２ａを配置し、その上に床材２ｄを敷き詰める工法は減少しているので、従来の取付構造を用いることができないという問題があった。
【０００５】
そこで、この問題を解決する手段として、例えば図１４に示すように、外枠１に設けられた上フランジ１ａを、床部Ｆに設けられた開口部２の周縁部上面に載置し、外枠１に設けられた水平の係止部１ｅを貫通する取付ねじ１ｆを、床部Ｆの下面に圧接される固定部３ａを有する断面略Ｚ字状の固定金具３にねじ結合することにより、外枠１の上フランジ１ａと固定金具３の固定部３ａとで床部Ｆを挟持して、外枠１を取り付けることができる（特開平１１−９３３９５号公報参照）。この際、外枠１の下面側と固定金具３の上面側とを当接することで、外枠１の固定状態が安定されている。
【０００６】
この取付構造によれば、床部Ｆの開口部２に根太２ａが配置されない場合でも、床部Ｆの開口部２に外枠１を取り付けることができる。
【０００７】
【発明が解決しようとする課題】
しかしながら、上記特開平１１−９３３９５号公報に記載の取付構造においては、外枠１と固定金具３とを取付ねじ１ｆによって締め付け、床点検口の開口部２の周縁部を挟持するだけの構造であるため、床部Ｆと外枠１との取付強度が十分でないという問題があった。
【０００８】
また、外枠１の固定状態を安定させるために、外枠１の下面側と固定金具３とを当接する必要がある。したがって、外枠１を取り付ける床部Ｆの厚さに応じて外枠１及び固定金具３の寸法を変更しなければならないので、それぞれの厚さに適合した外枠１及び固定金具３を製造しなくてはならなくなり、生産コストが嵩むという問題もあった。
【０００９】
この発明は、上記事情に鑑がみなされたもので、根太の位置や床部の厚さに関係なく、床部に設けられた開口部への外枠の取り付けを容易かつ強固にする床点検口の取付構造を提供することを目的とするものである。
【００１０】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の発明は、床部に設けられる開口部に取り付けられる外枠と、この外枠内に着脱可能に嵌合する内枠と、この内枠を周縁に装着してなる開閉用の蓋体とを具備する床点検口の取付構造であって、上記外枠に、上記床部の開口縁部上面に載置される上フランジと、この上フランジと反対方向に延在する下フランジとを設けると共に、下フランジに貫通孔を穿設し、上記下フランジに穿設された上記貫通孔を貫通する取付ねじに固定金具をねじ結合可能に形成し、上記固定金具に、上記取付ねじをねじ結合するねじ孔を有する矩形板状の基部と、この基部の両側辺から垂下する互いに平行に対峙する一対の垂下部とからなる断面略逆Ｕ字状の取付部と、この取付部の上記垂下部にそれぞれ連設されて上記床部の下面に圧接される一対の垂直片にて形成される固定部とを設けると共に、上記固定部の垂直片の上面に床部に食い込み可能な１又は複数の突起を形成し、上記垂下部の端部の角部には円弧状面が形成され、上記床部の開口縁部上面に上記外枠の上フランジを載置した状態で、上記取付ねじを上記固定金具にねじ結合することによって、上記外枠の上フランジと固定金具の固定部とで床部を挟持すると共に、上記突起を床部下面に食い込ませて固定することを特徴とする。この場合、突起は尖先状である方がよく、例えば鋸歯状に形成することできる。
【００１１】
このように構成することにより、床部の開口縁部上面に外枠の上フランジを戴置した状態で取付ねじを固定金具にねじ結合し、外枠の上フランジと固定金具の固定部とで床部を挟持すると共に、この固定金具の固定部上面に形成された突起が床部下面に食い込むことにより、根太の位置に関係なく、床部に直接外枠を取り付けることができると共に、床部の開口部に外枠を強固にかつ確実に固定することができる。また、外枠と固定金具との間隔を取付ねじの回動により調整することができるので、床部の厚さに関係なく床部の開口縁部に外枠を取付固定することができる。また、取付部の垂下部の角部に円弧状面を形成することにより、固定金具を床部の下方に手探りで位置させる際に、手に傷が付くのを防止することができ、安全である。
【００１３】
また、請求項１記載の発明によれば、固定金具の固定部が、互いに平行に対峙する一対の垂直片の両上端に突起が突設されているので、取付ねじを固定金具に締め付けて、外枠の上フランジと固定金具の固定部とで床部を挟持する際に、突起が床部の下面に確実に食い込むことができ、床部に外枠を更に強固にかつ確実に固定することができる。
【００１４】
請求項２記載の発明は、請求項１記載の床点検口の取付構造において、上記外枠の下フランジの先端部下面に係止片を設け、上記固定金具の取付部における固定部と反対側の端部に、上記取付ねじを締め付けた状態において上記係止片と係合可能な倒れ止め片を突設してなることを特徴とする。この場合、上記倒れ止め片を、その先端部が固定金具の取付部の内方側に向かって傾斜状に形成する方が好ましい（請求項３）。また、上記倒れ止め片に、この倒れ止め片の先端部の任意を切り取り可能にする切り取り用の切欠きを設ける方が好ましい（請求項４）。
【００１５】
このように構成することにより、外枠と固定金具とで床部を挟持する際、取付ねじを締め付けることにより、外枠の下フランジの先端部下面に形成された係止片と、固定金具に突設された倒れ止め片が係合するので、取付ねじと固定金具との締め付けによる外枠の開口部内方への倒れを阻止することができると共に、固定部の床部下面への圧接及び突起の床部への食い込みを確実にすることができる。したがって、床部の開口部に外枠を更に強固にかつ確実に固定することができる。この場合、倒れ止め片を、固定金具の取付部の内方側に向かって傾斜状に形成することにより、外枠を床部の開口部に取り付ける際に、取付ねじを締め付けて固定金具を上昇させると、倒れ止め片の上端が外枠の下フランジの下面の係止片に当接するので、固定金具が回動することなく、固定部を床部下面に移動して圧接することができる。また、倒れ止め片が外枠の下フランジの下面に当接するので、その反力によって固定部が床部下面から離反することなく、固定部を床部下面に確実に圧接することができると共に、突起を床部下面に確実に食い込ませることができる（請求項３）。また、倒れ止め片に設けられた切欠の箇所にて倒れ止め片の先端側を切り取ることにより、床部の厚みが薄い場合においても倒れ止め片を外枠の下フランジに設けられた係止片に係合することができる（請求項４）。
【００１６】
【発明の実施の形態】
以下に、この発明の床点検口の取付構造について、添付図面に基づいて詳細に説明する。ここで、従来の床点検口と同じ部分は、同一符号を付して説明する。
【００１７】
◎ 第一実施形態
図１は、この発明の床点検口の取付構造を示す概略平面図、図２は、床点検口の主要部を示す断面図である。
【００１８】
上記床点検口は、図１及び図２に示すように、床部Ｆ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４０と、内枠４０を蓋板材５１の周縁に装着してなる蓋体５０とで主要部が構成されており、蓋体５０の蓋板材５１に開閉用の取手６０が取り付けられている。
【００１９】
上記外枠１０は、図１ないし図４に示すように、床部Ｆに略方形状に形成された開口部２内に取り付けられる枠組形状のものであって、アルミニウム合金製の押出形材にて形成される外枠材２０同士をコーナーピース（図示せず）にて連結されている。この外枠１０は、床部Ｆの開口部２の内周面に当接する垂直片１１と、この垂直片１１の上端から外方に向かって延在され、床部Ｆの開口縁部上面に載置される上フランジ１２と、垂直片１１の下端から内方に向かって延在され、蓋体５０の内枠４０を載置する下フランジ１３とで主に構成されている。
【００２０】
この場合、上フランジ１２の上面は、基端側から先端に向かって下り勾配の傾斜面１４が形成されている。このように、上フランジ１２の上面に傾斜面１４を形成することにより、外枠１０を床部Ｆに取り付けた状態で、床面と外枠１０とのギャップを少なくすることができる。また、下フランジ１３には、１個又は長手方向に適宜間隔をおいて２個あるいは３個の貫通孔１５が穿設されている。この貫通孔１５には、取付ねじ９０が貫通可能になっている。この取付ねじ９０には、床部Ｆの下面に圧接される後述する固定金具３０がねじ結合可能に形成され、この固定金具３０と上フランジ１２とで床部Ｆの開口部を挟持し得るようになっている。
【００２１】
また、垂直片１１の外側上部には、垂直片１１から外方へ延在し、その先端が下方に折曲される上部折曲片１６と、この上部折曲片１６に対峙するように、垂直片１１の下端から外方へ延在し、その先端が上方に折曲される下部折曲片１７が形成されている。このように形成される上部折曲片１６及び下部折曲片１７は、床部Ｆに外枠１０を取り付ける際に、床部Ｆの開口部２の内周面に当接されて、外枠１０の位置決めを行うことができる。なお、上部折曲片１６と下部折曲片１７により形成されるコーナーピース取付溝２１内に、外枠材２０同士を連結するコーナーピース（図示せず）を挿入できるようになっている。
【００２２】
また、上フランジ１２と垂直片１１と、上部折曲片１６とによって、外方に開口する第１の取付溝１８が形成されている。この第１の取付溝１８内には、床部Ｆと外枠１０との気密性を図るための第１のパッキン８Ａが取り付けられている。また、下フランジ１３の先端部には、上方に開口する断面略円弧状の第２の取付溝１９が形成されている。この第２の取付溝１９内には、外枠１０と内枠４０との気密性を図るための第２のパッキン８Ｂが取り付けられている。なお、これら第１の取付溝１８の底面及び第２の取付溝１９の内側面には、それぞれ取付溝１８，１９の長手方向に沿って突起１８ａ，１９ａが突設されている。この突起１８ａ，１９ａによって、第１及び第２のパッキン８Ａ，８Ｂが外方へ押圧されて常時第１及び第２の取付溝１８，１９から突出した状態になっている。なお、この場合、第２の取付溝１９の内側面には２つの突起１９ａが突設されている。また、上記第１及び第２のパッキン８Ａ，８Ｂは、例えば合成ゴム等の伸縮自在な弾性材によって断面円形の紐状をなしており、その両端が連結金具（図示せず）や接着等によっていわゆるエンドレスとなる環状すなわち無端状に形成されている。
【００２３】
上記固定金具３０は、図５に示すように、上記取付ねじ９０とねじ結合可能なねじ孔３１ａを中央部に有する矩形板状の基部３１と、この基部３１の両側辺から垂下する互いに平行に対峙する一対の垂下部３２とからなる断面略逆Ｕ字状の取付部３３と、この取付部３３の垂下部３２からそれぞれ側方に連設される一対の垂直片３４にて形成される固定部３５とで構成されている。この場合、上記ねじ孔３１ａは、バーリング加工によってバーリング孔が穿設され、そのバーリング孔にねじ溝が形成されている。また、固定部３５の両垂直片３４の上端３６には床部Ｆの下面に、食い込み可能な例えば鋸歯状の突起３７が突設されている。なお、突起３７は尖先状に形成されるものであれば１つであってもよい。また、取付部３３の垂下部３２の端部の角部には円弧状面３８が形成されている。このように、取付部３３の垂下部３２の角部に円弧状面３８を形成することにより、固定金具３０を床部Ｆの下方に手探りで位置させる際に、手に傷が付くのを防止することができる。施工後の使用においても、同様の効果が得られるので、安全である。
【００２４】
上記内枠４０は、アルミニウム合金製押出形材にて形成される四つの内枠材４１を図示しないコーナー結合部材を介して四角の枠状に結合されている。この場合、内枠材４１は、図２に示すように、断面略コ字状に形成されており、起立壁４２の内周側の上、下端から内方に向かって延在する下フランジ４３と上フランジ４５とにより、蓋板材５１を嵌挿するための取付溝４７を有している。取付溝４７内に挿入された蓋板材５１は、下フランジ４３の下方から挿入される木ねじ９１を締め付けることによって固定される。
【００２５】
また、内枠材４１は、上フランジ４５及び下フランジ４３の内壁にわずかながら垂下する突起４６が形成されると共に、下フランジ４３の基部に段差部４４が形成され、上フランジ４５及び下フランジ４３の突起４６と、起立壁４２との間に、内枠材４１同士を連結するコーナーピース（図示せず）を挿入できるようになっている。なお、内枠材４１は、上フランジ４５の外縁には外方に若干突出する膨出部４８が設けられており、この膨出部４８によって、平面視における外枠１０と内枠４０との隙間を狭くしている。
【００２６】
上記のように構成される内枠４０を蓋板材５１の周縁に装着してなる蓋体５０には、図１及び図２に示すように、蓋体５０を開閉するための取手６０が装着されている。上記取手６０の構造は、図２に示すように、蓋板材５１の所定位置に設けられた丸孔５２に上から挿入されたとき、ナット６１で締め付けられることによって蓋体５０に取手６０が装着される。そして、取手６０のプッシュ部（図示せず）が押下されると、その反対側の部分から取手６０が上方に起き上がることにより、取手６０を掴んで開閉操作を行えるようになっている。
【００２７】
また、蓋板材５１の底部５３には、図２に示すように、外方に延びる一対の翼片７１を有する断面ハット状の補強材７０が木ねじ９２によって取り付けられている。この補強材７０は、例えばスチール製部材にて形成されている。
【００２８】
次に、床点検口の取付手順について、図６を参照して説明する。まず、予め第１及び第２の取付溝１８，１９に第１及び第２のパッキン８Ａ，８Ｂが取り付けられた外枠１０の下フランジ１３に穿設された貫通孔１５に取付ねじ９０を貫挿し、この取付ねじ９０を、固定金具３０の取付部３３にねじ結合しておく。
【００２９】
次に、図６（ａ）に示すように、固定金具３０を床部Ｆと干渉しないように固定部３５側を開口部内方側又は外枠１０の長手方向と平行に位置させた状態で、外枠１０及び固定金具３０を、床部Ｆの開口部２内に挿入する（図６（ａ）▲１▼参照）。特に、固定金具３０の固定部３５側を開口部内方側に位置させた状態では、取付部３３の垂下部３２の角部に円弧状面３８が形成されているため、外枠１０及び固定金具３０を床部Ｆの開口部２内に挿入する際のガイドとなり、円滑に作業を行うことができる。
【００３０】
次に、図６（ｂ）に示すように、外枠１０の上フランジ１２を、床部Ｆの開口縁部上面に載置すると共に、第１のパッキン８Ａを床部Ｆの開口部２の内周面に密接する（図６（ｂ）▲２▼参照）。この状態で、固定金具３０の固定部３５を水平方向に回転して、固定部３５を床部の下方へ移動する（図６（ｂ）▲３▼参照）。
【００３１】
そして、図６（ｃ）に示すように、固定金具３０が回転しないように軽く手を添えて取付ねじ９０を締め付けると、固定金具３０が上昇して、固定部３５が床部Ｆの下面に圧接されると共に、突起３７が床部Ｆの下面に食い込む（図６（ｃ）▲４▼参照）。この状態で、上フランジ１２と固定部３５とが共働して床部Ｆの開口縁部が挟持されるので、外枠１０は、床部Ｆの開口部２内に確実にかつ強固に取り付けられる。
【００３２】
◎第二実施形態
図７は、この発明に係る床点検口の取付構造の第二実施形態の主要部を示す断面図である。
【００３３】
第二実施形態は、外枠の取付（固定）を更に確実に行えるようにした場合である。すなわち、外枠１０Ａの下フランジ１３に設けられた係止片１３ａと固定金具３０Ａに設けられた倒れ止め片３９とを係合させて、外枠１０Ａの取付状態における固定金具３０Ａの倒れを阻止して、外枠１０Ａの取付（固定）を確実に行えるようにした場合である。
【００３４】
この場合、外枠１０Ａは、アルミニウム合金製の押出形材にて形成される外枠材２０Ａ同士をコーナーピース（図示せず）にて連結されており、図７ないし図９に示すように、垂直片１１の上端に、外方に向かって延在する上フランジ１２を具備すると共に、垂直片１１の下端に、内方に向かって延在する下フランジ１３を具備し、下フランジ１３の先端部下面に係止片１３ａを垂下してなる。また、下フランジ１３の基端側には、上方に向かって開口する断面略円弧状のパッキン取付溝１９Ａが設けられており、このパッキン取付溝１９Ａ内に第２のパッキン８Ｂが取付られている。なお、外枠１０Ａにおけるその他の部分は、上記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。
【００３５】
一方、固定金具３０Ａは、図１０に示すように、上記取付ねじ９０とねじ結合可能なねじ孔３１ａを中央部に有する矩形板状の基部３１と、この基部３１の両側辺から垂下する互いに平行に対峙する一対の垂下部３２とからなる断面略逆Ｕ字状の取付部３３と、この取付部３３の垂下部３２からそれぞれ側方に延在する一対の垂直片３４にて形成される固定部３５とを具備し、取付部３３の基部３１における固定部３５と反対側の辺部から起立し上記係止片１３ａと係合可能な倒れ止め片３９を突設してなる。
【００３６】
この場合、倒れ止め片３９は、先端に向かって基部３１側に若干傾斜して設けられている。このように、倒れ止め片３９を基部３１の片部から基部３１の内方側に若干傾斜させることにより、外枠１０Ａの取付の際に、取付ねじ９０を締め付けて固定金具３０Ａを上昇させると、倒れ止め片３９の上端が外枠１０Ａの下フランジ１３の下面の係止片１３ａに当接するので、固定金具３０Ａが回動することがない。また、倒れ止め片３９の先端部が係止片１３ａの外方に位置することがなく、確実に係止片１３ａと係合することができる。この際、取付ねじ９０を締め付けることにより、倒れ止め片３９の先端部が下フランジ１３の下面に当接して突っ張った状態になるので、取付ねじ９０と固定金具３０Ａのねじ結合部が支点として、倒れ止め片３９の先端部と下フランジ１３の下面との当接力の反力が固定部３５に加わって、固定部３５及び突起１３を床部Ｆの下面に圧接すると共に、突起１３を床部Ｆの下面に食い込ますことができる。
【００３７】
また、倒れ止め片３９は、中間の所定位置の両側に切欠き３９ａが設けられている。この切欠き３９ａの箇所から倒れ止め片３９の先端を切り取ることにより、床部Ｆの厚さが薄い場合においても倒れ止め片３９を係止片１３ａに係合することができる（図１２参照）。なお、図１０では、切欠き３９ａが倒れ止め片３９の左右一箇所に設ける場合について説明したが、倒れ止め片３９の一側に切欠き３９ａを設けてもよい。また、床部Ｆの異なる厚さに対応させて複数箇所に切欠き３９ａを設けてもよい。
【００３８】
なお、第二実施形態において、その他の部分は、上記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。なお、第二実施形態では、外枠１０Ａの下フランジ１３の基部側に第２の取付溝１９Ａを設けた場合について説明したが、第一実施形態に用いた外枠１０に代えてもよい。また、第一実施形態においても第二実施形態で用いた外枠１０Ａを用いてもよい。
【００３９】
次に、第二実施形態の床点検口の取付手順について、図１１を参照して説明する。まず、第一実施形態と同様に、予め第１及び第２の取付溝１８，１９Ａに第１及び第２のパッキン８Ａ，８Ｂが取り付けられた外枠１０Ａの下フランジ１３に穿設された貫通孔１５に取付ねじ９０を貫挿し、この取付ねじ９０を、固定金具３０Ａの取付部３３にねじ結合しておく。
【００４０】
次に、図１１（ａ）に示すように、固定金具３０Ａを床部Ｆと干渉しないように固定部３５側を開口部２の内方側又は外枠１０Ａの長手方向と平行に位置させた状態で、外枠１０Ａ及び固定金具３０Ａを、床部Ｆの開口部２内に挿入する（図１１（ａ）▲１▼参照）。特に、固定金具３０Ａの固定部３５側を開口部内方側に位置させた状態では、取付部３３の垂下部３２の角部に円弧状面３８が形成されているため、外枠１０Ａ及び固定金具３０Ａを床部Ｆの開口部２内に挿入する際のガイドとなり、円滑に作業を行うことができる。
【００４１】
次に、図１１（ｂ）に示すように、外枠１０Ａの上フランジ１２を、床部Ｆの開口２の縁部上面に載置すると共に、第１のパッキン８Ａを床部Ｆの開口部２の内周面に密接する（図１１（ｂ）▲２▼参照）。この状態で、固定金具３０Ａの固定部３５を水平方向に回転して、固定部３５を床部の下方へ移動する（図１１（ｂ）▲３▼参照）。
【００４２】
そして、図１１（ｃ）に示すように、取付ねじ９０を締め付けると、倒れ止め片３９の先端が取付ねじ９０に接触しながら固定金具３０Ａが上昇して、固定部３５が床部Ｆの下面に圧接されると共に、突起３７が床部Ｆの下面に食い込み、更に、倒れ止め片３９の先端部が係止片１３ａに係合する（図１１（ｃ）▲４▼参照）。
【００４３】
したがって、第二実施形態の床点検口の取付構造によれば、取付ねじ９０を締め付ける際に、倒れ止め片３９が取付ねじ９０に接触しながら固定金具３０Ａが上昇するので、固定金具３０Ａが回動することなく、固定部３５を床部Ｆの下面に移動して圧接することができる。また、倒れ止め片３９が係止片１３ａに係合することにより、固定部３５が床部Ｆの下面から離反することがなく、固定部３５を床部Ｆの下面に確実に圧接することができると共に、突起３７の床部Ｆ下面への食い込みを確実にすることができる。
【００４４】
【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。
【００４５】
（１）請求項１記載の発明によれば、床部の開口縁部上面に外枠の上フランジを載置状態で取付ねじを固定金具にねじ結合し、外枠の上フランジと固定金具の固定部とで床部を挟持すると共に、この固定金具の固定部上面に形成された突起が床部下面に食い込むので、根太の位置に関係なく、床部に直接外枠を取り付けることができると共に、床部の開口部に外枠を強固にかつ確実に固定することができる。また、外枠と固定金具との間隔を取付ねじの回動により調整することができるので、床部の厚さに関係なく床部の開口縁部に外枠を取付固定することができる。また、取付部の垂下部の角部に円弧状面を形成することにより、固定金具を床部の下方に手探りで位置させる際に、手に傷が付くのを防止することができ、安全である。
【００４６】
（２）また、請求項１記載の発明によれば、固定金具の固定部が、互いに平行に対峙する一対の垂直片の両上端に、突起が突設されているので、取付ねじを固定金具に締め付けて、外枠の上フランジと固定金具の固定部とで床部を挟持する際に、突起が床部の下面に確実に食い込むので、上記（１）に加えて更に強固にかつ確実に固定することができる。
【００４７】
（３）請求項２記載の発明によれば、外枠と固定金具とで床部を挟持する際、取付ねじを締め付けることにより、外枠の下フランジの先端部下面に形成された係止片と、固定金具に突設された倒れ止め片が係合するので、上記（１）又は（２）に加えて取付ねじと固定金具との締め付けによる外枠の開口部内方への倒れを阻止することができると共に、固定部の床部下面への圧接及び突起の床部への食い込みを更に確実にすることができ、かつ、床部の開口部に外枠を更に強固にかつ確実に固定することができる。
【００４８】
（４）請求項３記載の発明によれば、倒れ止め片の先端部を固定金具の取付部の内方側に向かって傾斜状に形成することにより、取付ねじを締め付けて固定金具を上昇させると、倒れ止め片の上端が外枠の下フランジの下面の係止片に当接するので、固定金具が回動することなく固定部を床部下面に移動して圧接することができると共に、固定部が床部下面から離反することなく、固定部を床部下面に移動して圧接することができるので、上記（３）に加えて、外枠の取り付けを更に容易にすることができる。
【００４９】
（５）請求項４記載の発明によれば、倒れ止め片に設けられた切欠きの箇所にて、倒れ止め片の先端側を切り取ることにより、床部の厚みが薄い場合においても、倒れ止め片を外枠の下フランジに設けられた係止片に係合することができる。また、床部の厚みに対応した固定金具を製造する必要がなく、生産コストの削減を図ることができる。
【図面の簡単な説明】
【図１】この発明の床点検口の取付構造を示す概略平面図である。
【図２】この発明の第一実施形態における床点検口の主要部を示す断面図である。
【図３】上記床点検口の外枠の取付構造を示す断面図である。
【図４】上記外枠と取付ねじを示す分解斜視図である。
【図５】この発明の第一実施形態における固定金具の一部を断面で示す斜視図である。
【図６】この発明の第一実施形態における外枠の取付前の状態を示す断面図（ａ）、取付作業状態を示す断面図（ｂ）、取付完了状態を示す断面図（ｃ）である。
【図７】この発明の第二実施形態における床点検口の主要部を示す断面図である。
【図８】上記床点検口の外枠の取付構造を示す断面図である。
【図９】上記床点検口の外枠と取付ねじを示す分解斜視図である。
【図１０】この発明の第二実施形態における固定金具を示す斜視図である。
【図１１】この発明の第二実施形態における外枠の取付前の状態を示す断面図（ａ）、取付作業状態を示す断面図（ｂ）、取付完了状態を示す断面図（ｃ）である。
【図１２】この発明の第二実施形態において床部の厚みが薄い場合の外枠の取付構造を示す断面図である。
【図１３】従来の床点検口の取付構造の外枠を示す断面図である。
【図１４】従来の別の床点検口の取付構造の外枠を示す断面図である。
【符号の説明】
Ｆ床部
２開口部
１０，１０Ａ外枠
１２上フランジ
１３下フランジ
１３ａ係止片
１５貫通孔
３０，３０Ａ固定金具
３１ａねじ孔
３３取付部
３４垂直片
３５固定部
３６上端
３７突起
３９倒れ止め片
３９ａ切欠き
４０内枠
５０蓋体
９０取付ねじ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor inspection port mounting structure, and more particularly to a floor inspection port mounting structure attached to an opening provided in a floor portion.
[0002]
[Prior art]
In general, a floor inspection port has an outer frame that is attached to an opening provided in the floor, an inner frame that is detachably fitted in the outer frame, and an opening / closing lid that is mounted on the periphery of the inner frame. It consists mainly of the body.
[0003]
Conventionally, in order to attach a floor inspection opening to the floor, for example, as shown in FIG. 13, the upper flange 1 a provided in the outer frame 1 is placed on the upper surface of the edge of the opening 2 provided in the floor F. Then, the lower flange 1b provided on the outer frame 1 is placed on the joist 2b fixed to the joist 2a disposed at the lower portion of the opening 2 with the fixing wood screw 2c, and the lower flange 1b is drilled. The mounting wood screw 1d that penetrates the provided through hole 1c is screwed to the sub joist 2b.
[0004]
However, in recent years, there has been a problem that the conventional mounting structure cannot be used because the method of disposing the joist 2a as in the past and laying the flooring 2d thereon has decreased.
[0005]
Therefore, as a means for solving this problem, for example, as shown in FIG. 14, the upper flange 1a provided on the outer frame 1 is placed on the upper surface of the peripheral edge of the opening 2 provided on the floor F, By screwing a mounting screw 1f penetrating through a horizontal locking portion 1e provided in the frame 1 to a fixing bracket 3 having a substantially Z-shaped cross section having a fixing portion 3a pressed against the lower surface of the floor portion F, The outer frame 1 can be attached by sandwiching the floor F between the upper flange 1a of the outer frame 1 and the fixing portion 3a of the fixing bracket 3 (see Japanese Patent Laid-Open No. 11-93395). At this time, the fixed state of the outer frame 1 is stabilized by contacting the lower surface side of the outer frame 1 and the upper surface side of the fixing bracket 3.
[0006]
According to this attachment structure, the outer frame 1 can be attached to the opening 2 of the floor F even when the joist 2a is not disposed in the opening 2 of the floor F.
[0007]
[Problems to be solved by the invention]
However, in the mounting structure described in the above-mentioned Japanese Patent Application Laid-Open No. 11-93395, the outer frame 1 and the fixing bracket 3 are tightened with a mounting screw 1f so that the peripheral edge of the opening 2 of the floor inspection port is sandwiched. Therefore, there is a problem that the mounting strength between the floor portion F and the outer frame 1 is not sufficient.
[0008]
Further, in order to stabilize the fixed state of the outer frame 1, it is necessary to abut the lower surface side of the outer frame 1 and the fixture 3. Therefore, since the dimensions of the outer frame 1 and the fixing bracket 3 must be changed according to the thickness of the floor portion F to which the outer frame 1 is attached, the outer frame 1 and the fixing bracket 3 suitable for each thickness are manufactured. There was also a problem that the production cost was increased.
[0009]
This invention has been regarded as an insight into the above circumstances, and floor inspection makes it easy and firm to attach the outer frame to the opening provided in the floor regardless of the position of the joist and the thickness of the floor. The object is to provide a mouth mounting structure.
[0010]
[Means for Solving the Problems]
 In order to achieve the above object, an invention according to claim 1 is directed to an outer frame attached to an opening provided in a floor, an inner frame that is detachably fitted into the outer frame, and a peripheral edge of the inner frame. A floor inspection port mounting structure comprising an opening / closing lid mounted on the upper frame, an upper flange placed on the upper surface of the opening edge of the floor portion, and the upper flange, A lower flange extending in the opposite direction, a through hole is formed in the lower flange, and a fixing bracket is formed so that the fixing screw can be coupled to the mounting screw that penetrates the through hole formed in the lower flange. The fixing bracket has a screw hole for screwing the mounting screw.It has a substantially inverted U-shaped cross section consisting of a rectangular plate-shaped base and a pair of hanging portions that hang from both sides of the base and face each other in parallel.Mounting part and this mounting partAbove the droopConnected and pressed against the lower surface of the floorFormed by a pair of vertical piecesAnd providing a fixing part,Vertical piece of the fixed partCan bite into the floor on top ofOne or moreForming protrusions,An arcuate surface is formed at the corner of the end of the hanging part, With the upper flange of the outer frame placed on the upper surface of the opening edge of the floor, the mounting screw is screwed to the fixing bracket, so that the upper flange of the outer frame and the fixing portion of the fixing bracket While pinching a floor part, the said processus | protrusion bites into a floor part lower surface, It is characterized by the above-mentioned.In this case, the protrusions are preferably pointed, and can be formed in a sawtooth shape, for example.
[0011]
 With this configuration, the mounting screw is screwed to the fixing bracket while the upper flange of the outer frame is placed on the upper surface of the opening edge of the floor, and the upper flange of the outer frame and the fixing portion of the fixing bracket are connected. While sandwiching the floor part, the protrusion formed on the upper surface of the fixing part of this fixing bracket bites into the lower surface of the floor part, so that the outer frame can be directly attached to the floor part regardless of the position of the joist. The outer frame can be firmly and securely fixed to the opening. Further, since the distance between the outer frame and the fixing bracket can be adjusted by rotating the mounting screw, the outer frame can be fixedly attached to the opening edge of the floor regardless of the thickness of the floor.In addition, by forming an arcuate surface at the corner of the hanging part of the mounting part, it is possible to prevent the hand from being scratched when the fixing bracket is located by hand under the floor part. is there.
[0013]
 According to the invention of claim 1,Since the protrusion of the fixing part of the fixing bracket protrudes from both upper ends of a pair of vertical pieces facing each other in parallel, the mounting screw is fastened to the fixing bracket, and the upper flange of the outer frame and the fixing part of the fixing bracket Thus, when the floor portion is clamped, the protrusion can surely bite into the lower surface of the floor portion, and the outer frame can be more firmly and securely fixed to the floor portion.
[0014]
 Claim2The described invention is claimed.1In the mounting structure of the floor inspection port described above, a locking piece is provided on the bottom surface of the lower end of the lower flange of the outer frame, and at the end of the fixing bracket opposite to the fixing portion,With the mounting screw tightenedA fall stop piece that can be engaged with the locking piece is provided in a protruding manner. In this case, it is preferable that the tip of the fall prevention piece is formed so as to be inclined toward the inner side of the mounting portion of the fixing bracket.3). In addition, it is preferable to provide a notch for cutting that makes it possible to cut any of the tip end portions of the anti-falling piece on the anti-falling piece.4).
[0015]
 By configuring in this way, when sandwiching the floor portion between the outer frame and the fixing bracket,By tightening the mounting screw,Since the locking piece formed on the lower surface of the front end of the lower flange of the outer frame and the locking piece protruding from the fixing bracket are engaged, the inside of the opening of the outer frame is tightened by tightening the mounting screw and fixing bracket. Can be prevented, and the press-contact of the fixed portion to the lower surface of the floor portion and the biting of the protrusion into the floor portion can be ensured. Therefore, the outer frame can be more firmly and securely fixed to the opening of the floor. In this case, when the outer frame is attached to the opening of the floor, the fixing bracket is raised by tightening the attachment screw when the fall-preventing piece is formed in an inclined shape toward the inner side of the attachment of the fixing bracket. If it does, since the upper end of the fall prevention piece will contact | abut to the latching piece of the lower surface of the lower flange of an outer frame, a fixing | fixed part can be moved to a floor part lower surface, and can be press-contacted, without rotating. In addition, since the fall prevention piece abuts the lower surface of the lower flange of the outer frame, the fixing portion can be reliably pressed against the lower surface of the floor portion without the fixing portion being separated from the lower surface of the floor portion by the reaction force, The protrusion can be securely bited into the lower surface of the floor (claims)3). Also, by cutting off the tip side of the fall stop piece at the notch provided on the fall stop piece, even if the floor is thin, the fall stop piece is provided on the lower flange of the outer frame. Can be engaged (claims)4).
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Below, the mounting structure of the floor inspection port of this invention is demonstrated in detail based on an accompanying drawing. Here, the same parts as those of the conventional floor inspection port will be described with the same reference numerals.
[0017]
◎ First embodiment
FIG. 1 is a schematic plan view showing a mounting structure of a floor inspection port according to the present invention, and FIG. 2 is a cross-sectional view showing a main part of the floor inspection port.
[0018]
As shown in FIGS. 1 and 2, the floor inspection port is detachably fitted into an outer frame 10 attached in a substantially rectangular opening 2 provided in the floor F. The main part is comprised by the inner frame 40 and the cover body 50 which attaches the inner frame 40 to the periphery of the cover board material 51, and the handle 60 for opening and closing is attached to the cover board material 51 of the cover body 50. Yes.
[0019]
As shown in FIGS. 1 to 4, the outer frame 10 has a frame shape attached to an opening 2 formed in a substantially square shape on the floor F, and is formed of an extruded product made of aluminum alloy. The outer frame members 20 formed by joining are connected by a corner piece (not shown). The outer frame 10 extends from the upper end of the vertical piece 11 to the outside in contact with the inner peripheral surface of the opening 2 of the floor F, and extends outward from the upper end of the floor F. The upper flange 12 to be placed and the lower flange 13 that extends inward from the lower end of the vertical piece 11 and places the inner frame 40 of the lid 50 are mainly configured.
[0020]
In this case, on the upper surface of the upper flange 12, an inclined surface 14 having a downward slope from the proximal end side toward the distal end is formed. Thus, by forming the inclined surface 14 on the upper surface of the upper flange 12, the gap between the floor surface and the outer frame 10 can be reduced in a state where the outer frame 10 is attached to the floor portion F. Further, one or two or three through holes 15 are formed in the lower flange 13 at appropriate intervals in the longitudinal direction. A mounting screw 90 can be passed through the through hole 15. A fixing bracket 30 to be described later that is pressed against the lower surface of the floor portion F is formed on the mounting screw 90 so as to be able to be screwed together. The fixing bracket 30 and the upper flange 12 can sandwich the opening of the floor portion F. It has become.
[0021]
Further, on the outer upper portion of the vertical piece 11, an upper bent piece 16 that extends outward from the vertical piece 11 and that has its tip bent downward, and the upper bent piece 16 face each other, A lower bent piece 17 that extends outward from the lower end of the vertical piece 11 and has its tip bent upward is formed. The upper bent piece 16 and the lower bent piece 17 formed in this way are brought into contact with the inner peripheral surface of the opening 2 of the floor portion F when the outer frame 10 is attached to the floor portion F. Ten positionings can be performed. In addition, a corner piece (not shown) for connecting the outer frame members 20 can be inserted into a corner piece mounting groove 21 formed by the upper bent piece 16 and the lower bent piece 17.
[0022]
Further, the upper flange 12, the vertical piece 11, and the upper bent piece 16 form a first attachment groove 18 that opens outward. In the first mounting groove 18, a first packing 8 A is attached for airtightness between the floor F and the outer frame 10. Further, a second mounting groove 19 having a substantially arc-shaped cross section that opens upward is formed at the tip of the lower flange 13. In the second mounting groove 19, a second packing 8B for mounting the outer frame 10 and the inner frame 40 is attached. In addition, protrusions 18a and 19a project from the bottom surface of the first mounting groove 18 and the inner surface of the second mounting groove 19 along the longitudinal direction of the mounting grooves 18 and 19, respectively. By the projections 18a and 19a, the first and second packings 8A and 8B are pressed outward and always protrude from the first and second mounting grooves 18 and 19. In this case, two protrusions 19 a are provided on the inner surface of the second mounting groove 19. The first and second packings 8A and 8B are formed in a string shape having a circular cross section by a stretchable elastic material such as synthetic rubber, and both ends thereof are connected by a connecting metal fitting (not shown), adhesion, or the like. It is formed into a so-called endless annular or endless shape.
[0023]
As shown in FIG. 5, the fixing bracket 30 includes a rectangular plate-shaped base 31 having a screw hole 31 a that can be screw-coupled to the mounting screw 90 at the center, and parallel to each other depending from both sides of the base 31. An attachment portion 33 having a substantially inverted U-shaped cross section composed of a pair of drooping portions 32 facing each other, and a fixing formed by a pair of vertical pieces 34 respectively provided side by side from the drooping portion 32 of the attachment portion 33. Part 35. In this case, the screw hole 31a is formed with a burring hole by burring, and a screw groove is formed in the burring hole. Further, for example, sawtooth-shaped protrusions 37 that can bite are protruded from the lower surface of the floor F at the upper ends 36 of the two vertical pieces 34 of the fixing portion 35. The number of the protrusions 37 may be one as long as it is formed in a pointed shape. An arcuate surface 38 is formed at the corner of the end of the hanging portion 32 of the mounting portion 33. In this way, by forming the arc-shaped surface 38 at the corner of the hanging portion 32 of the mounting portion 33, it is possible to prevent the hand from being scratched when the fixing bracket 30 is located under the floor portion F by groping. can do. Since the same effect is obtained even after use, it is safe.
[0024]
In the inner frame 40, four inner frame members 41 formed of an extruded shape made of aluminum alloy are coupled in a square frame shape via a corner coupling member (not shown). In this case, as shown in FIG. 2, the inner frame member 41 is formed in a substantially U-shaped cross section, and a lower flange 43 extending inwardly from the upper and lower ends on the inner peripheral side of the standing wall 42. The upper flange 45 has an attachment groove 47 for fitting the lid plate material 51. The lid plate material 51 inserted into the mounting groove 47 is fixed by tightening a wood screw 91 inserted from below the lower flange 43.
[0025]
Further, the inner frame member 41 is formed with protrusions 46 slightly hanging on the inner walls of the upper flange 45 and the lower flange 43, and a stepped portion 44 is formed at the base of the lower flange 43. A corner piece (not shown) for connecting the inner frame members 41 can be inserted between the protrusion 46 and the upright wall 42. The inner frame member 41 is provided with a bulging portion 48 that slightly protrudes outward at the outer edge of the upper flange 45, and the bulging portion 48 allows the outer frame 10 and the inner frame 40 to be seen in plan view. The gap is narrowed.
[0026]
As shown in FIGS. 1 and 2, a handle 60 for opening and closing the lid 50 is attached to the lid 50 formed by mounting the inner frame 40 configured as described above on the periphery of the lid plate material 51. ing. As shown in FIG. 2, the handle 60 has a structure in which the handle 60 is attached to the lid 50 by being tightened with a nut 61 when inserted into a round hole 52 provided at a predetermined position of the lid plate material 51 from above. Is done. When a push portion (not shown) of the handle 60 is pressed, the handle 60 rises upward from the opposite side, so that the handle 60 can be grasped and opened and closed.
[0027]
Further, as shown in FIG. 2, a cross-sectional hat-shaped reinforcing member 70 having a pair of outwardly extending blade pieces 71 is attached to the bottom 53 of the lid plate material 51 by a wood screw 92. The reinforcing material 70 is formed of a steel member, for example.
[0028]
Next, a procedure for installing the floor inspection port will be described with reference to FIG. First, the mounting screw 90 is passed through the through hole 15 formed in the lower flange 13 of the outer frame 10 in which the first and second packings 8A and 8B are mounted in the first and second mounting grooves 18 and 19 in advance. The mounting screw 90 is screwed to the mounting portion 33 of the fixing bracket 30 in advance.
[0029]
Next, as shown in FIG. 6A, in a state where the fixing portion 35 side is positioned in parallel with the inner side of the opening or the longitudinal direction of the outer frame 10 so as not to interfere with the floor portion F, The outer frame 10 and the fixing bracket 30 are inserted into the opening 2 of the floor F (see FIG. 6 (a) (1)). In particular, in a state where the fixing portion 35 side of the fixing bracket 30 is positioned on the inner side of the opening portion, since the arc-shaped surface 38 is formed at the corner portion of the hanging portion 32 of the mounting portion 33, the outer frame 10 and the fixing bracket It becomes a guide at the time of inserting 30 in the opening part 2 of the floor F, and can work smoothly.
[0030]
Next, as shown in FIG. 6B, the upper flange 12 of the outer frame 10 is placed on the upper surface of the opening edge of the floor F, and the first packing 8A is placed on the opening 2 of the floor F. Close contact with the inner peripheral surface (see (2) in FIG. 6B). In this state, the fixing portion 35 of the fixing metal 30 is rotated in the horizontal direction, and the fixing portion 35 is moved below the floor portion (see (3) in FIG. 6B).
[0031]
Then, as shown in FIG. 6C, when the attachment screw 90 is lightly tightened so that the fixing bracket 30 does not rotate and the mounting screw 90 is tightened, the fixing bracket 30 rises and the fixing portion 35 is placed on the lower surface of the floor F. At the same time, the protrusion 37 bites into the lower surface of the floor F (see (4) in FIG. 6). In this state, the upper flange 12 and the fixing portion 35 cooperate to sandwich the opening edge of the floor portion F, so that the outer frame 10 is securely and firmly attached to the opening 2 of the floor portion F. It is done.
[0032]
◎ Second embodiment
FIG. 7 is a cross-sectional view showing the main part of the second embodiment of the floor inspection port mounting structure according to the present invention.
[0033]
In the second embodiment, the outer frame can be attached (fixed) more reliably. That is, the locking piece 13a provided on the lower flange 13 of the outer frame 10A is engaged with the anti-falling piece 39 provided on the fixing metal 30A to prevent the fixing metal 30A from falling down when the outer frame 10A is attached. In this case, the outer frame 10A can be securely attached (fixed).
[0034]
In this case, the outer frame 10A is connected to each other by a corner piece (not shown) between the outer frame members 20A formed of an extruded shape made of an aluminum alloy, as shown in FIGS. The upper end of the vertical piece 11 is provided with an upper flange 12 extending outward, and the lower end of the vertical piece 11 is provided with a lower flange 13 extending inward. A locking piece 13a is suspended from the lower surface of the part. Further, on the base end side of the lower flange 13, a packing mounting groove 19A having a substantially arc-shaped cross section that opens upward is provided, and the second packing 8B is mounted in the packing mounting groove 19A. . In addition, since the other part in 10 A of outer frames is the same as said 1st embodiment, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.
[0035]
On the other hand, as shown in FIG. 10, the fixing bracket 30 A has a rectangular plate-like base 31 having a screw hole 31 a that can be screw-coupled to the mounting screw 90 at the center, and parallel to each other depending from both sides of the base 31. An attachment portion 33 having a substantially inverted U-shaped cross section composed of a pair of hanging portions 32 facing each other and a pair of vertical pieces 34 respectively extending laterally from the hanging portion 32 of the attachment portion 33. And a fall-preventing piece 39 protruding from a side portion of the base portion 31 of the attachment portion 33 opposite to the fixing portion 35 and being able to engage with the locking piece 13a.
[0036]
In this case, the fall prevention piece 39 is provided slightly inclined toward the base 31 side toward the tip. In this way, by tilting the fall-preventing piece 39 slightly from the one part of the base part 31 toward the inner side of the base part 31, when the outer frame 10 A is attached, the attachment screw 90 is tightened to raise the fixing bracket 30 A. Since the upper end of the fall-preventing piece 39 contacts the locking piece 13a on the lower surface of the lower flange 13 of the outer frame 10A, the fixing bracket 30A does not rotate. Further, the tip end portion of the fall prevention piece 39 is not located outside the locking piece 13a, and can be reliably engaged with the locking piece 13a. At this time, by tightening the mounting screw 90, the tip end portion of the fall-off prevention piece 39 comes into contact with the lower surface of the lower flange 13, and is stretched. The reaction force of the contact force between the tip end portion of the fall-stop piece 39 and the lower surface of the lower flange 13 is applied to the fixing portion 35 to press the fixing portion 35 and the protrusion 13 against the lower surface of the floor portion F, and the protrusion 13 is connected to the floor portion. Can bite into the bottom of F.
[0037]
Further, the fall prevention piece 39 is provided with notches 39a on both sides of an intermediate predetermined position. By cutting off the tip of the fall-preventing piece 39 from the position of the notch 39a, the fall-preventing piece 39 can be engaged with the locking piece 13a even when the floor portion F is thin (see FIG. 12). . In addition, although FIG. 10 demonstrated the case where the notch 39a was provided in one place of the right and left of the fall prevention piece 39, you may provide the notch 39a in the one side of the fall prevention piece 39. FIG. Moreover, you may provide the notch 39a in several places corresponding to the thickness from which the floor part F differs.
[0038]
In addition, in 2nd embodiment, since another part is the same as said 1st embodiment, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted. In addition, although 2nd embodiment demonstrated the case where the 2nd attachment groove 19A was provided in the base part side of the lower flange 13 of 10 A of outer frames, you may replace with the outer frame 10 used in 1st embodiment. Also in the first embodiment, the outer frame 10A used in the second embodiment may be used.
[0039]
Next, the installation procedure of the floor inspection port according to the second embodiment will be described with reference to FIG. First, similarly to the first embodiment, a through hole previously drilled in the lower flange 13 of the outer frame 10A in which the first and second packing grooves 8A and 8B are attached to the first and second attachment grooves 18 and 19A. A mounting screw 90 is inserted into the hole 15, and this mounting screw 90 is screwed to the mounting portion 33 of the fixing bracket 30A.
[0040]
Next, as shown in FIG. 11A, the fixing portion 35 side is positioned parallel to the inner side of the opening 2 or the longitudinal direction of the outer frame 10A so that the fixing bracket 30A does not interfere with the floor portion F. In the state, the outer frame 10A and the fixing bracket 30A are inserted into the opening 2 of the floor F (see FIG. 11A). In particular, in a state where the fixing portion 35 side of the fixing bracket 30A is positioned on the inner side of the opening, the arc-shaped surface 38 is formed at the corner of the hanging portion 32 of the mounting portion 33. It becomes a guide when 30A is inserted into the opening 2 of the floor F, and the work can be performed smoothly.
[0041]
Next, as shown in FIG. 11 (b), the upper flange 12 of the outer frame 10A is placed on the upper surface of the edge of the opening 2 of the floor F, and the first packing 8A is opened to the opening of the floor F. 2 (see FIG. 11 (b) (2)). In this state, the fixing portion 35 of the fixing bracket 30A is rotated in the horizontal direction to move the fixing portion 35 below the floor portion (see (3) in FIG. 11B).
[0042]
Then, as shown in FIG. 11C, when the mounting screw 90 is tightened, the fixing bracket 30 A rises while the tip of the fall prevention piece 39 is in contact with the mounting screw 90, and the fixing portion 35 is the lower surface of the floor portion F. The protrusion 37 bites into the lower surface of the floor portion F, and the tip end portion of the fall-preventing piece 39 engages with the locking piece 13a (see FIG. 11 (c) (4)).
[0043]
Therefore, according to the floor inspection port mounting structure of the second embodiment, when the mounting screw 90 is tightened, the fixing bracket 30A is raised while the fall-preventing piece 39 is in contact with the mounting screw 90. Without moving, the fixing portion 35 can be moved to the lower surface of the floor portion F and brought into pressure contact therewith. Further, when the fall prevention piece 39 is engaged with the locking piece 13a, the fixing portion 35 is not separated from the lower surface of the floor portion F, and the fixing portion 35 can be reliably pressed against the lower surface of the floor portion F. In addition, the protrusion 37 can be securely bited into the bottom surface of the floor F.
[0044]
【The invention's effect】
As described above, since the present invention is configured as described above, the following excellent effects can be obtained.
[0045]
 (1) According to the invention described in claim 1, with the upper flange of the outer frame placed on the upper surface of the opening edge of the floor, the mounting screw is screwed to the fixing bracket, and the upper flange of the outer frame and the fixing bracket are While holding the floor part between the fixed part and the protrusion formed on the upper surface of the fixed part of the fixing metal bite into the lower surface of the floor part, the outer frame can be directly attached to the floor part regardless of the position of the joist. The outer frame can be firmly and securely fixed to the opening of the floor. Further, since the distance between the outer frame and the fixing bracket can be adjusted by rotating the mounting screw, the outer frame can be fixedly attached to the opening edge of the floor regardless of the thickness of the floor.In addition, by forming an arcuate surface at the corner of the hanging part of the mounting part, it is possible to prevent the hand from being scratched when the fixing bracket is located by hand under the floor part. is there.
[0046]
 (2)According to the invention of claim 1,Because the protrusions are projected at both upper ends of a pair of vertical pieces that face each other in parallel, the fixing part of the fixing bracket is fastened to the fixing bracket to fix the upper flange of the outer frame and the fixing bracket. When the floor portion is sandwiched between the portions, the protrusions securely bite into the lower surface of the floor portion, so that it can be more firmly and reliably fixed in addition to the above (1).
[0047]
 (3) Claim2According to the described invention, when sandwiching the floor portion between the outer frame and the fixing bracket,By tightening the mounting screw,Since the locking piece formed on the lower surface of the front end of the lower flange of the outer frame and the fall-preventing piece projecting from the fixing bracket are engaged, the mounting screw and the fixing bracket in addition to the above (1) or (2) And the inner frame can be prevented from falling into the opening by tightening the outer frame, the press-contact of the fixed part to the lower surface of the floor and the biting of the protrusion into the floor can be further ensured, and the floor The outer frame can be more firmly and reliably fixed to the opening of the part.
[0048]
 (4) Claim3According to the described invention, when the tip of the fall-preventing piece is formed in an inclined shape toward the inner side of the mounting portion of the fixing bracket, when the fixing screw is raised by tightening the mounting screw, Since the upper end is in contact with the locking piece on the lower surface of the lower flange of the outer frame, the fixing part can be moved to the lower surface of the floor without being rotated, and the fixing part can be brought into pressure contact with the lower surface of the floor. Since the fixing portion can be moved and pressed against the lower surface of the floor portion without separating, in addition to the above (3), the outer frame can be attached more easily.
[0049]
 (5) Claim4According to the described invention, the tip of the anti-falling piece is cut off at the notch provided in the anti-falling piece, so that the anti-falling piece is placed under the outer frame even when the floor is thin. It can be engaged with a locking piece provided on the flange. Moreover, it is not necessary to manufacture a fixture corresponding to the thickness of the floor portion, and the production cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a floor inspection port mounting structure according to the present invention.
FIG. 2 is a cross-sectional view showing the main part of the floor inspection port in the first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a mounting structure of an outer frame of the floor inspection port.
FIG. 4 is an exploded perspective view showing the outer frame and mounting screws.
FIG. 5 is a perspective view showing a part of the fixture in the first embodiment of the present invention in cross section.
FIG. 6 is a cross-sectional view (a) showing a state before the outer frame is attached in the first embodiment of the present invention, a cross-sectional view (b) showing an attachment work state, and a cross-sectional view (c) showing an attachment completion state. .
FIG. 7 is a cross-sectional view showing a main part of a floor inspection port in a second embodiment of the present invention.
FIG. 8 is a cross-sectional view showing the mounting structure of the outer frame of the floor inspection port.
FIG. 9 is an exploded perspective view showing an outer frame and mounting screws of the floor inspection port.
FIG. 10 is a perspective view showing a fixing metal fitting in a second embodiment of the present invention.
FIG. 11 is a cross-sectional view (a) showing a state before the outer frame is attached in a second embodiment of the present invention, a cross-sectional view (b) showing an attachment work state, and a cross-sectional view (c) showing an attachment completion state. .
FIG. 12 is a cross-sectional view showing an outer frame mounting structure when the floor portion is thin in the second embodiment of the present invention.
FIG. 13 is a cross-sectional view showing an outer frame of a conventional floor inspection port mounting structure.
FIG. 14 is a cross-sectional view showing an outer frame of another conventional floor inspection port mounting structure.
[Explanation of symbols]
F floor
2 opening
10, 10A outer frame
12 Upper flange
13 Lower flange
13a Locking piece
15 Through hole
30, 30A fixing bracket
31a Screw hole
33 Mounting part
34 Vertical piece
35 fixed part
36 Top
37 protrusions
39 Stopping piece
39a Notch
40 inner frame
50 lid
90 mounting screws

Claims

Floor inspection comprising an outer frame attached to an opening provided in the floor, an inner frame removably fitted in the outer frame, and a lid for opening and closing the inner frame attached to the periphery. The mouth mounting structure,
The outer frame is provided with an upper flange placed on the upper surface of the opening edge of the floor, and a lower flange extending in a direction opposite to the upper flange, and a through hole is formed in the lower flange.
A fixing bracket is formed so that it can be screw-coupled to a mounting screw that penetrates the through hole formed in the lower flange,
A rectangular plate-shaped base portion having a screw hole for screwing the mounting screw to the fixing bracket, and a pair of hanging portions facing each other in parallel and hanging from both sides of the base portion. An attachment portion and a fixing portion formed by a pair of vertical pieces that are respectively connected to the hanging portion of the attachment portion and press-contacted to the lower surface of the floor portion are provided, and an upper surface of the vertical piece of the fixing portion Forming one or more protrusions that can bite into the floor,
An arcuate surface is formed at the corner of the end of the hanging part,
With the upper flange of the outer frame placed on the upper surface of the opening edge of the floor, the mounting screw is screwed to the fixing bracket, so that the upper flange of the outer frame and the fixing portion of the fixing bracket A floor inspection port mounting structure characterized in that the floor portion is sandwiched and the protrusion is cut into the bottom surface of the floor portion and fixed.

In the floor inspection port mounting structure according to claim 1 ,
A locking piece is provided on the lower surface of the front end of the lower flange of the outer frame, and can be engaged with the locking piece in a state where the mounting screw is tightened to the end of the mounting portion of the fixing bracket opposite to the fixing portion. An installation structure for a floor inspection port, which is characterized by a protrusion provided on the floor.

In the floor inspection port mounting structure according to claim 2 ,
An installation structure for a floor inspection port, wherein the tip of the fall prevention piece is formed so as to be inclined toward the inner side of the attachment part of the fixing bracket.

In the floor inspection port mounting structure according to claim 2 or 3 ,
An installation structure for a floor inspection port, wherein the falling stop piece is provided with a cutout for cutting which allows an arbitrary cutting of the tip end portion of the fallback piece.