JP3762521B2

JP3762521B2 - Steel floor panel

Info

Publication number: JP3762521B2
Application number: JP19271297A
Authority: JP
Inventors: 辰夫庄司; 昇岡田
Original assignee: Naka Corp
Current assignee: Naka Corp
Priority date: 1997-07-17
Filing date: 1997-07-17
Publication date: 2006-04-05
Anticipated expiration: 2017-07-17
Also published as: JPH1136564A

Description

【０００１】
【産業上の利用分野】
本発明は、支持脚によって支持された状態で建築物の床面の上方に敷設され、床面上に二重床を構成する、鋼板製フロアパネルに関するものである。
【０００２】
【従来の技術】
鋼板製フロアパネルは、従来から、一般に、プレス成形された鋼板製の表部材と裏部材とを溶接、リベット止め、はぜ折り、かしめ等の連結手段によって一体化し、内部に充填材を満たして構成されている。例えば、実開平１−１７９９４２号には、上面板と裏面板とを、それらの周縁部と、裏面板に形成した複数のドーム状突起の頂部と上面板の裏面とで接触させ、これらの接触部に通常のカシメ加工を施して両者を接合した金属製床パネルが開示されている。また、特開平８−６８１８８号には、上面板と下面板との接触部において、両板を密着させた状態で一方に押し出し加工することによって凸状の重合部を形成し、この重合部の先端部の周縁に押圧溝を形成して局部的な張り出し部を形成し、両板を一体化したフリーアクセス床板の結合構造が開示されている。そして、実開平６−１０４８０号には、フリーアクセスフロア用パネルの上面部材又は下面部材の一方に結合用穴又は凹部を形成し、この結合用穴又は凹部に対応する下面部材の部位を加工して結合用凸部を形成し、この結合用凸部を結合用穴又は凹部に嵌入させた状態で凸部の頭部を圧潰して上、下面部材を一体化させた、フリーアクセスフロア用のパネルが開示されている。
【０００３】
【発明が解決しようとする課題】
上述した従来のカシメ結合構造は、いずれも、これらの出願前から一般に使用されているカシメ加工をフロアパネルの上面板と下面板との結合に利用したものであるから、これらのカシメ加工によって得られる結合強度は従来のカシメ結合強度を上回るものではない。
【０００４】
本発明の目的は、結合すべき部材の結合強度が高く、結合部自体が変形しにくい構造を有するカシメ結合により、表部材と裏部材を接合してなる鋼板製フロアパネルを提供することにある。
【０００５】
【課題を解決するための手段】
本発明の鋼板製フロアパネルは、鋼板製の表部材と、前記表部材に一体化された、鋼板製の裏部材と、前記表部材と前記裏部材との間に形成された空間とを有する、鋼板製フロアパネルにおいて、前記裏部材の前記表部材に対する接触部に、前記表部材とは反対の方向に突出した壁部によって画成されたカシメ孔を形成し、前記表部材に突出形成されたカシメ突起を前記カシメ孔に挿入し、前記カシメ突起の前記壁部から突出した先端部分に前記カシメ孔よりも大径の変形部分を形成し、前記変形部分を前記壁部の端面に圧接させて前記表部材と前記裏部材を一体化したことを特徴とする。このような構成の鋼板製フロアパネルによれば、カシメ結合部はカシメ孔を画成する壁部とこの壁部の端面に圧接した変形部分とを有し、この変形部分は壁面の端面に対して二重に屈曲した係合部分を有するから、高い結合強度を有する。また、カシメ孔を画成する壁部はカシメ孔の周囲に強度を付加するリブ構造を構成するから、カシメ孔の変形が防止され、カシメ結合部における結合強度を向上させると共にフロアパネルの強度を向上させる。
【０００６】
なお、カシメ孔は、裏部材に形成することもでき、さらには、表部材の周縁部又は裏部材の周縁部にも形成することができる。
【０００７】
また、変形部分の端面に一つ又は複数個の押圧部を形成することにより、変形部分の強度を更に向上させることができる。この押圧部は、変形部分の端面の中央部に一つ形成することもできるし、複数個の押圧部を変形部分の端面に一定間隔をおいて放射状に形成することもできる。
【０００８】
鋼板製フロアパネルの表部材と裏部材との間に形成された空間に充填材を満たすことにより、鋼板製フロアパネルの耐荷重強度を大幅に向上させることができる。
【０００９】
【発明の実施の形態】
以下、本発明の実施例を図面を参照して説明する。
【００１０】
第１図ないし第５図は本発明の一つの実施例である鋼板製フロアパネルの全体構成を示す。この鋼板製フロアパネル１は、所定厚の鋼板をプレス成形することによって形成した、全体として方形の表部材２と、この表部材２と整合するような形状にプレス成形された鋼板製の裏部材３とを有する。
【００１１】
表部材２の上面２ａには、その全面に亙ってカシメ用の凹所２ｃが複数個形成され、また、その四辺には表部材２を裏部材３に締結させるためのはぜ折り部２ｄが間隔をおいて適当数形成されている。更に、はぜ折り部２ｄに隣接した位置には、裏部材３の方向に垂下する当接板２ｅが各辺について２枚又は３枚ずつ表部材３に一体形成されている。これらの当接板２ｅは、フロアパネル１の敷設時に、隣接するフロアパネルの対応する当接板（図示せず。）に当接させることにより、既に敷設されたフロアパネルに対して新たに敷設するフロアパネルを位置決めするために使用される。
【００１２】
表部材２の四隅部には、また、ほぼ四分円形をした段差部２ｆが形成されている。これらの段差部２ｆは、フロアパネル１を支持脚（図示せず。）に固定するためのパネル押さえ（図示せず。）が係合するように、湾曲した形状を有する。各段差部２ｆには、また、小さなはぜ折り部２ｇが形成され、これらのはぜ折り部２ｇによって表部材２と裏部材３は締結される。
【００１３】
表部材２と裏部材３の四辺のうちの一対の辺には、それぞれ、凹状部４ａが形成され、これらの凹状部４ａは表部材２と裏部材３との締結時にそれぞれ整合して、フロアパネル１の一対の辺にそれぞれ配線引き出し用の開口部４を画成する。開口部４の三辺には段差部４ｂが形成され、表部材２に形成され、かつ、これらの段差部４ｂの裏側に折り返された、はぜ折り部２ｄ、２ｄ、２ｄは、表部材２と裏部材３との締結に使用されると共に、開口部４の周縁部を補強する。なお、第５図中、段差部４ｂの一対の小孔４ｃは、開口部４を閉塞するための蓋体（図示せず。）の裏面の突起（図示せず。）と係合して、段差部４ｂに蓋体を係止するために形成されている。
【００１４】
裏部材３には、プレス成形によって、複数種類の補強用リブからなるリブ構造が形成されている。このリブ構造は、裏部材３の辺縁に沿って連続的に延在する周縁リブ５を有し、この周縁リブ５はフロアパネル１の各辺の中央部で内方へ湾曲した湾曲部５ａをそれぞれ有する。湾曲部５ａは、フロアパネル１の一対の辺縁においてはフロアパネル１の開口部４との干渉を避けつつ連続するために設けられ、また、他の一対の辺縁においてはフロアパネル１の強度の対称性を得るために形成されている。このような湾曲部５ａをも含めて、周縁リブ５はフロアパネル１の辺縁に沿って、途切れることなく、連続的に延在する。
【００１５】
裏部材３には、また、フロアパネル１の対角線方向に延在する対角リブ６、７が形成され、対角リブ６、７は、裏部材３の中央部に形成された中央リブ８を介して、連続的に延在する。中央リブ８は裏部材３の周縁リブ５の内側に形成され、裏部材３の中央部において全体として方形をなすように連続的に延在する。周縁リブ５と対角リブ６、７と中央リブ８は互いに同一の高さで延在する。この実施例では中央リブ８が形成されているが、中央リブ８は必ずしも形成する必要はない。中央リブ８を設けることにより、フロアパネル１の中央部の強度を大幅に向上させることができる。
【００１６】
周縁リブ５と対角リブ６、７と中央リブ８の間には中間リブ９が形成され、中間リブ９はリブ５、６、７、８よりも低い位置に延在する。中間リブ９はリブ５、６、７、８を連結し、かつ、それ自身も連続的に延在する。中間リブ９の両側には表部材２の裏面に当接する凹部１０がそれぞれ形成されている。各凹部１０の底面の中央部にはカシメ孔１８（図６、図７等参照）が形成されている。
【００１７】
中央部に位置する一対の凹部１０、１０の間には低位リブ１１が形成されている。低位リブ１１は、周縁リブ５の湾曲部５ａと中央リブ８とを連結すると共に、これらの一対の凹部１０、１０の側壁を連結し、それ自身も連続的に延在する。低位リブ１１は中間リブ９よりも更に低位に形成され、他のリブ５、６、７、８、９との関係は第４図に示す通りである。すなわち、同図に示されている通り、中間リブ９は、周縁リブ５、５ａ、対角リブ６、７、中央リブ８から距離ｌだけ低い位置に形成され、また、低位リブ１１は距離ｌよりも大きな距離ｍだけ低い位置に形成されている。
【００１８】
中央リブ８の中心には中心リブ１２が形成され、中心リブ１２は中央リブ８から距離ｎだけ低い位置に形成されている。中心リブ１２はそれを囲繞する中央リブ８に連続し、更に、中心リブ１２自身も切れ目なく連続する。中心リブ１２の四隅部には表部材２の裏面に当接する４つの凹部１３が形成され、凹部１３は凹部１０と同様に平坦な底面を有する。凹部１０、１３は、表部材２と裏部材３との接合時に、表部材２の裏面に当接して荷重を支持するための柱を構成するから、より大きな荷重を支持するためには凹部１０、１３の側壁の傾斜角度は、凹部の底面の法線に対して出来るだけ鋭角に傾斜することが好ましい。その理由は、凹部の耐荷重性能を向上させると共に、表部材２と裏部材３の間に形成された空間に充填材を満たし、これを固化させたとき、凹部１０、１３の側壁の傾斜角度が凹部の底面の法線に対して大きな角度であるほど、凹部１０、１３の周囲に充填材の薄肉部が生成され、これによって強度低下を生じる可能性があるからである。このような薄肉部の生成を防止するため、凹部１０、１３の側壁の傾斜角度を、凹部の底面の法線に対して出来るだけ鋭角にすることが好ましい。
【００１９】
さて、表部材２と裏部材３とを一体化するカシメ結合について説明する。
【００２０】
表部材２と裏部材３とを一体化するには、先ず、表部材２と裏部材３を位置合わせし、表部材２の裏面に裏部材３の凹部１０、１３を当接させる。次いで、プレス加工により、表部材２と裏部材３とを凹部１０、１３でカシメ加工してカシメ部１４を形成し、フロアパネル１の周縁部においても同様にカシメ加工を施してカシメ部１５を形成する。これらのカシメ部１４、１５による結合の外に、表部材２と裏部材３とは、フロアパネル１の周縁部において、表部材２のはぜ折り部２ｄを裏部材３に沿って折り曲げることによっても結合されている。これらのカシメ加工及びハゼ折り加工は同時に行うこともできるし、複数工程に分けて行うこともできる。
【００２１】
第６図は第１図のＤ−Ｄ線に沿った断面を示し、この図にはフロアパネル１の周縁部におけるカシメ部１５が示されている。また、第７図は第１図のＥ−Ｅ線に沿った断面を示し、この図にはフロアパネル１の表部材２と裏部材３の凹部１０、１３とのカシメ部１４が示されている。カシメ部１４、１５は同一の構造を有し、いずれのカシメ部１４、１５も、次のような構成を有する。すなわち、裏部材３の表部材２に対する接触部１６にバーリング加工を施し、これにより表部材２とは反対の方向へ突出した円筒状の壁部１７を形成すると共に、この壁部１７によってカシメ孔１８を画成する。また、表部材２のカシメ孔１８に対応する位置には円筒絞り加工により裏部材３方向に突出したカシメ突起１９を形成し、このカシメ突起１９をカシメ孔１８に嵌入させた状態で表部材２と裏部材３を重ね合わせる。この状態で、カシメ突起１９の先端部分はカシメ孔１８の壁部１７から突出しているから、この先端部分を押圧して変形部分１９ａを形成する。変形部分１９ａはその周縁部が二重に折り畳まれ、全体として円盤状をなす。変形部分１９ａはその二重に折り畳まれた周縁部を、壁部１７を押し潰さない状態で、壁部１７の端面に圧接させている。これにより、表部材２と裏部材３は強固に締結される。
【００２２】
第８図及び第９図はカシメ部１４の変形態様を示し、このカシメ部１４の変形部分１４Ａには放射方向に複数個の押圧部１４ｂが形成されている。この押圧部１４ｂを形成することにより、変形部分１４Ａの強度を向上させることができるから、カシメ部１４の締結強度を向上させることができる。
【００２３】
第１０図及び第１１図はカシメ部１４の更に他の変形態様を示し、このカシメ部１４の変形部分１４Ｃの中央部には単一の押圧部１４Ｂが形成されている。この押圧部１４Ｂを形成することにより、変形部分１４Ｃの強度を向上させることができるから、カシメ部１４の締結強度を向上させることができる。
【００２４】
第１２図ないし第１４図に示す実施例は、裏部材３に形成されたカシメ用の凹部１０の底部１０ａに補強用のリブ１０ｂ、１０ｃを形成し、底部１０ａの強度を向上させた実施例である。補強用のリブ１０ｂ、１０ｃはカシメ部１４を挟んでその両側に形成され、補強用のリブ１０ｂ、１０ｃと表部材２との間には空隙１０ｄが画成されている。補強用のリブ１０ｂ、１０ｃを形成することにより、カシメ部１４を形成した底部１０ａの強度が向上するから、カシメ部１４の締結強度を増大させることができる。表部材２と裏部材３の間の空間に充填材Ｆを充填すれば、フロアパネル１の強度を更に向上させることができる。
【００２５】
第１５図及び第１６図はカシメ部の更に他の変更態様を示し、このカシメ部１４０の特徴は次の事項にある。表部材２の裏部材３に対する接触部１６０にバーリング加工を施し、裏部材３とは反対の方向に突出した壁部１７０を形成する。壁部１７０は中央にカシメ孔１８０を画成し、その周囲に環状の溝２００を有する。環状の溝２００は表部材２にバーリング加工を施すときに同時に成形しても良いし、バーリング加工の前工程又は後工程として加工してもよい。他方、裏部材３の凹部９の底部には円筒絞り加工によりカシメ突起１９０を形成する。このカシメ突起１９０は表部材２の方向へ突出し、表部材２と裏部材３とを重ね合わせたときに、カシメ突起１９０がカシメ孔１８０に嵌入する位置に形成される。裏部材３のカシメ突起１９０の周囲には表部材２の環状の溝２００に嵌合する形状を有する環状の溝２１０が形成され、カシメ突起１９０をカシメ孔１８０に嵌入したとき、環状の溝２１０の内部に環状の溝２００が嵌合するように構成されている。この状態において、カシメ突起１９０の先端部分はカシメ孔１８０の壁部１７０から突出しているから、この先端部分を押圧して変形部分１９０ａを形成する。変形部分１９０ａはその周縁部が二重に折り畳まれ、全体として円盤状をなす。変形部分１９０ａはその二重に折り畳まれた周縁部を、壁部１７０を押し潰さない状態で、壁部１７０の端面に圧接させている。これにより、表部材２と裏部材３は強固に締結される。そして、このとき変形部分１９０ａの表面と表部材２の表面とは面一になるように構成される。
【００２６】
第１７図及び第１８図は、第１５図及び第１６図に示したカシメ部１４０の変形態様を示し、このカシメ部１４０の変形部分１９０ａには放射方向に複数個の押圧部１９０ｂが形成されている。この押圧部１９０ｂを形成することにより、変形部分１９０ａの強度を向上させることができるから、カシメ部１４０の締結強度を向上させることができる。なお、放射方向に配置された押圧部１９０ｂの代わりに、第１０図及び第１１図に示したような単一の押圧部を形成することもできる。
【００２７】
なお、第１３図に示すように、凹部１０の底面１０ａの法線Ｎに対する凹部１０の側壁１０ｅの傾斜角度αは出来るだけ鋭角であることが望ましい。その理由は、前述の通り、表部材２と裏部材３の間に形成された空間に充填材を満たし、これを固化させたとき、凹部１０の側壁１０ｅの傾斜角度αが凹部１０の底面１０ａの法線Ｎに対して大きな角度であるほど、凹部１０の周囲に充填材の薄肉部が生成され、これによって強度低下を生じる可能性があるからである。
【００２８】
また、凹部１０に形成した補強用のリブ１０ｂ、１０ｃと同様のリブを、凹部１３の底部に形成することもできる。
【００２９】
そして、フロアパネル１の裏部材３の四隅部にそれぞれ突起Ｐを設け、また、表部材２の対応する箇所にこれらの突起Ｐに係合する凹所Ｑを形成すると、工場からの出荷時等にフロアパネル１を積み重ねる場合に積み重ねたフロアパネル１が互いにずれることを防止することができる。
【００３０】
【発明の効果】
本発明の鋼板製フロアパネルによれば、表部材と裏部材とを締結するためのカシメ結合部は、カシメ孔を画成する壁部と、この壁部の端面に圧接した変形部分とを有し、この変形部分は壁面の端面に対して二重に屈曲した係合部分を有するから、高い結合強度を有する。また、カシメ孔を画成する壁部はカシメ孔の周囲に強度を付加するリブ構造を構成するから、カシメ孔の変形が防止され、カシメ結合部における結合強度を向上させることができると共にフロアパネルの強度を向上させることができる。
【００３１】
また、変形部分の端面に一つ又は複数個の押圧部を形成することにより、変形部分の強度を更に向上させることができる。これにより、カシメ結合強度を更に向上させることができる。
【００３２】
そして、鋼板製フロアパネルの表部材と裏部材との間に形成された空間に充填材を満たすことにより、鋼板製フロアパネルの耐荷重強度を大幅に向上させることができる。
【図面の簡単な説明】
【図１】本発明のフロアパネルの一実施例の裏面図である。
【図２】図１のフロアパネルの右側面図である。
【図３】図１のフロアパネルを下方から見た側面図である。
【図４】図１のフロアパネルのＡ−Ａ線に沿う断面図である。
【図５】図１のフロアパネルの半上面図である。
【図６】図１のＤ−Ｄ線に沿う断面図である。
【図７】図１のＥ−Ｅ線に沿う断面図である。
【図８】カシメ結合部の他の実施態様の断面図である。
【図９】図８の平面図である。
【図１０】カシメ結合部の更に他の実施態様の断面図である。
【図１１】図１０の平面図である。
【図１２】本発明のフロアパネルの凹部の変更態様を表す平面図である。
【図１３】図１２のＢ−Ｂ線に沿う断面図である。
【図１４】図１３のＣ−Ｃ線に沿う断面図である。
【図１５】カシメ結合部の更に他の実施態様の断面図である。
【図１６】図１５の平面図である。
【図１７】図１５のカシメ結合部の変更態様の断面図である。
【図１８】図１７のカシメ結合部の平面図である。
【符号の説明】
１フロアパネル
２上部材
２ｄはぜ折り部
３下部材
４配線引き出し用の開口部
５周縁リブ
５ａ周縁リブの湾曲部
６、７対角リブ
８中央リブ
９中間リブ
１０凹部
１１低位リブ
１２中心リブ
１３凹部
１４、１５、１４０カシメ部
１４Ａ、１９０ａ変形部分
１４ｂ、１４Ｂ、１９０ｂ押圧部
１６、１６０接触部
１７、１７０壁部
１８、１８０カシメ孔
１９、１９０カシメ突起
２００、２１０環状の溝[0001]
[Industrial application fields]
The present invention relates to a steel sheet floor panel that is laid above a floor surface of a building in a state of being supported by support legs and constitutes a double floor on the floor surface.
[0002]
[Prior art]
Conventionally, a steel sheet floor panel is generally formed by integrating a press-formed steel sheet front and back member by connecting means such as welding, riveting, screw folding, caulking, etc., and filling the inside with a filler. It is configured. For example, in Japanese Utility Model Laid-Open No. 1-179942, the upper surface plate and the back surface plate are brought into contact with each other at their peripheral edge portions, the tops of a plurality of dome-shaped protrusions formed on the back surface plate, and the back surface of the upper surface plate. A metal floor panel is disclosed in which a normal caulking process is applied to the part and both are joined. Further, in JP-A-8-68188, at the contact portion between the upper surface plate and the lower surface plate, a convex overlapping portion is formed by extruding one plate in a state where both plates are in close contact with each other. A joint structure of a free access floor board is disclosed in which a pressing groove is formed in the peripheral edge of the front end part to form a local overhang part, and both boards are integrated. In Japanese Utility Model Laid-Open No. 6-10480, a coupling hole or recess is formed in one of the upper surface member and the lower surface member of the free access floor panel, and the lower surface member corresponding to the coupling hole or recess is processed. Forming a convex portion for coupling, and crushing the head of the convex portion with the convex portion for coupling inserted into the coupling hole or concave portion, and integrating the lower surface member, for a free access floor A panel is disclosed.
[0003]
[Problems to be solved by the invention]
All of the above-described conventional caulking connection structures are obtained by using caulking, which has been generally used before the filing of these applications, to connect the upper surface plate and the lower surface plate of the floor panel. The resulting bond strength does not exceed the conventional caulking bond strength.
[0004]
An object of the present invention is to provide a steel panel floor panel in which a front member and a back member are joined by caulking joint having a structure in which the members to be joined have high joint strength and the joint part itself is not easily deformed. .
[0005]
[Means for Solving the Problems]
The steel plate floor panel of the present invention has a steel plate front member, a steel plate back member integrated with the front member, and a space formed between the front member and the back member. In the steel sheet floor panel, a crimping hole defined by a wall portion protruding in a direction opposite to the front member is formed in a contact portion of the back member with respect to the front member, and is formed to protrude from the front member. The caulking projection is inserted into the caulking hole, a deformed portion having a larger diameter than the caulking hole is formed at the tip portion protruding from the wall portion of the caulking projection, and the deformed portion is pressed against the end surface of the wall portion. The front member and the back member are integrated. According to the steel plate floor panel having such a structure, the caulking joint portion has a wall portion defining a caulking hole and a deformed portion pressed against the end surface of the wall portion, and the deformed portion is against the end surface of the wall surface. In addition, since it has a double bent engagement portion, it has a high bond strength. In addition, since the wall portion defining the caulking hole constitutes a rib structure that adds strength around the caulking hole, deformation of the caulking hole is prevented, and the bonding strength at the caulking coupling portion is improved and the strength of the floor panel is increased. Improve.
[0006]
The caulking holes can be formed in the back member, and can also be formed in the peripheral portion of the front member or the peripheral portion of the back member.
[0007]
In addition, by forming one or a plurality of pressing portions on the end face of the deformed portion, the strength of the deformed portion can be further improved. One pressing portion can be formed at the central portion of the end surface of the deformed portion, or a plurality of pressing portions can be formed radially at regular intervals from the end surface of the deforming portion.
[0008]
By filling the space formed between the front member and the back member of the steel plate floor panel with the filler, the load bearing strength of the steel plate floor panel can be greatly improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0010]
1 to 5 show the overall structure of a steel sheet floor panel according to one embodiment of the present invention. This steel plate floor panel 1 is formed by press-forming a steel plate having a predetermined thickness, and as a whole, a square front member 2 and a steel plate back member press-formed into a shape that matches the front member 2. 3.
[0011]
On the upper surface 2a of the front member 2, a plurality of caulking recesses 2c are formed over the entire surface, and a helical fold portion 2d for fastening the front member 2 to the back member 3 is formed on the four sides thereof. Is formed in an appropriate number at intervals. Further, two or three abutment plates 2e that hang in the direction of the back member 3 are integrally formed on the front member 3 at each position adjacent to the hull fold 2d. These abutment plates 2e are newly laid on the already laid floor panel by abutting against a corresponding abutment plate (not shown) of the adjacent floor panel when the floor panel 1 is laid. Used to position the floor panel.
[0012]
At the four corners of the front member 2, stepped portions 2f having a substantially quadrant shape are formed. These step portions 2f have a curved shape so that a panel presser (not shown) for fixing the floor panel 1 to a support leg (not shown) is engaged. Each step 2f is also formed with a small helix fold 2g, and the front member 2 and the back member 3 are fastened by the helix fold 2g.
[0013]
A pair of sides of the four sides of the front member 2 and the back member 3 are respectively formed with concave portions 4a, and these concave portions 4a are aligned with each other when the front member 2 and the back member 3 are fastened. Openings 4 for wiring drawing are defined on a pair of sides of the panel 1 respectively. Steps 4b are formed on the three sides of the opening 4, and are formed on the front member 2 and folded back to the back side of these steps 4b. And the back member 3 are used to fasten the peripheral edge of the opening 4. In FIG. 5, the pair of small holes 4 c of the stepped portion 4 b engages with a protrusion (not shown) on the back surface of a lid (not shown) for closing the opening 4. It is formed to lock the lid on the step 4b.
[0014]
The back member 3 is formed with a rib structure including a plurality of types of reinforcing ribs by press molding. This rib structure has a peripheral rib 5 continuously extending along the edge of the back member 3, and the peripheral rib 5 is curved inwardly at the center of each side of the floor panel 1. Respectively. The curved portion 5a is provided in order to avoid interference with the opening 4 of the floor panel 1 at the pair of edges of the floor panel 1, and the strength of the floor panel 1 at the other pair of edges. It is formed to obtain symmetry. The peripheral rib 5 including the curved portion 5 a extends continuously along the edge of the floor panel 1 without interruption.
[0015]
Diagonal ribs 6 and 7 extending in the diagonal direction of the floor panel 1 are also formed on the back member 3, and the diagonal ribs 6 and 7 have central ribs 8 formed at the center of the back member 3. Extending continuously through. The central rib 8 is formed inside the peripheral rib 5 of the back member 3 and continuously extends so as to form a square as a whole at the central portion of the back member 3. The peripheral rib 5, the diagonal ribs 6 and 7, and the central rib 8 extend at the same height. Although the central rib 8 is formed in this embodiment, the central rib 8 is not necessarily formed. By providing the central rib 8, the strength of the central portion of the floor panel 1 can be greatly improved.
[0016]
An intermediate rib 9 is formed between the peripheral rib 5, the diagonal ribs 6, 7 and the central rib 8, and the intermediate rib 9 extends to a position lower than the ribs 5, 6, 7, 8. The intermediate rib 9 connects the ribs 5, 6, 7, 8 and extends itself continuously. Concave portions 10 that are in contact with the back surface of the front member 2 are formed on both sides of the intermediate rib 9. A caulking hole 18 (see FIGS. 6, 7, etc.) is formed at the center of the bottom surface of each recess 10.
[0017]
A low rib 11 is formed between the pair of recesses 10 and 10 located at the center. The lower rib 11 connects the curved portion 5a of the peripheral rib 5 and the central rib 8, and also connects the side walls of the pair of recesses 10 and 10, and itself extends continuously. The lower rib 11 is formed lower than the intermediate rib 9, and the relationship with the other ribs 5, 6, 7, 8, 9 is as shown in FIG. That is, as shown in the figure, the intermediate rib 9 is formed at a position lower than the peripheral ribs 5 and 5a, the diagonal ribs 6 and 7 and the central rib 8 by a distance l, and the lower rib 11 is at a distance l. It is formed at a position lower by a larger distance m.
[0018]
A central rib 12 is formed at the center of the central rib 8, and the central rib 12 is formed at a position lower than the central rib 8 by a distance n. The central rib 12 is continuous with the central rib 8 surrounding the central rib 12, and further, the central rib 12 itself is continuously continuous. Four recesses 13 are formed at the four corners of the central rib 12 so as to come into contact with the back surface of the front member 2, and the recess 13 has a flat bottom surface like the recess 10. Since the concave portions 10 and 13 constitute columns for supporting the load by contacting the back surface of the front member 2 when the front member 2 and the back member 3 are joined, the concave portion 10 is required to support a larger load. , 13 is preferably inclined as acutely as possible with respect to the normal of the bottom surface of the recess. The reason is that the load-carrying performance of the recesses is improved and the space formed between the front member 2 and the back member 3 is filled with a filler, and when this is solidified, the inclination angle of the side walls of the recesses 10 and 13 is increased. This is because, as the angle is larger with respect to the normal line of the bottom surface of the concave portion, a thin portion of the filler is generated around the concave portions 10 and 13, which may cause a decrease in strength. In order to prevent the generation of such a thin portion, it is preferable to make the inclination angle of the side walls of the recesses 10 and 13 as acute as possible with respect to the normal line of the bottom surface of the recess.
[0019]
Now, the caulking connection for integrating the front member 2 and the back member 3 will be described.
[0020]
In order to integrate the front member 2 and the back member 3, first, the front member 2 and the back member 3 are aligned, and the concave portions 10 and 13 of the back member 3 are brought into contact with the back surface of the front member 2. Next, the front member 2 and the back member 3 are crimped by the concave portions 10 and 13 to form a crimped portion 14 by pressing, and the crimped portion 15 is similarly applied to the peripheral portion of the floor panel 1 to form the crimped portion 15. Form. In addition to the coupling by the crimping portions 14 and 15, the front member 2 and the back member 3 are formed by bending the helical fold portion 2 d of the front member 2 along the back member 3 at the peripheral edge of the floor panel 1. Is also coupled. These crimping processing and goby folding processing can be performed simultaneously, or can be performed in a plurality of steps.
[0021]
FIG. 6 shows a cross section along the line D-D in FIG. FIG. 7 shows a cross section taken along the line EE of FIG. 1. In this figure, a caulking portion 14 between the front member 2 of the floor panel 1 and the recesses 10 and 13 of the back member 3 is shown. Yes. The crimping portions 14 and 15 have the same structure, and any of the crimping portions 14 and 15 has the following configuration. That is, the contact portion 16 of the back member 3 with respect to the front member 2 is subjected to burring, thereby forming a cylindrical wall portion 17 projecting in the direction opposite to the front member 2, and the wall portion 17 causes a caulking hole to be formed. 18 is defined. Further, a caulking protrusion 19 projecting in the direction of the back member 3 is formed by cylindrical drawing at a position corresponding to the caulking hole 18 of the front member 2, and the front member 2 is inserted into the caulking hole 18. And the back member 3 are overlapped. In this state, the tip portion of the caulking projection 19 protrudes from the wall portion 17 of the caulking hole 18, and the tip portion is pressed to form the deformed portion 19a. The peripheral portion of the deformed portion 19a is double-folded to form a disk shape as a whole. The deformed portion 19a presses the double-folded peripheral edge portion against the end face of the wall portion 17 without crushing the wall portion 17. Thereby, the front member 2 and the back member 3 are fastened firmly.
[0022]
FIGS. 8 and 9 show a deformation mode of the caulking portion 14, and a plurality of pressing portions 14 b are formed in the deformation portion 14 </ b> A of the caulking portion 14 in the radial direction. Since the strength of the deformed portion 14A can be improved by forming the pressing portion 14b, the fastening strength of the crimping portion 14 can be improved.
[0023]
FIGS. 10 and 11 show still another modification of the crimping portion 14, and a single pressing portion 14B is formed at the center of the deformation portion 14C of the crimping portion 14. FIG. Since the strength of the deformed portion 14C can be improved by forming the pressing portion 14B, the fastening strength of the crimping portion 14 can be improved.
[0024]
The embodiment shown in FIGS. 12 to 14 is an embodiment in which reinforcing ribs 10b and 10c are formed on the bottom 10a of the caulking recess 10 formed on the back member 3 to improve the strength of the bottom 10a. It is. The reinforcing ribs 10 b and 10 c are formed on both sides of the crimping portion 14, and a gap 10 d is defined between the reinforcing ribs 10 b and 10 c and the front member 2. By forming the reinforcing ribs 10b and 10c, the strength of the bottom portion 10a on which the crimped portion 14 is formed is improved, so that the fastening strength of the crimped portion 14 can be increased. If the space between the front member 2 and the back member 3 is filled with the filler F, the strength of the floor panel 1 can be further improved.
[0025]
15 and 16 show still another modification of the caulking portion, and the characteristics of the caulking portion 140 are as follows. The contact part 160 of the front member 2 with respect to the back member 3 is subjected to burring to form a wall part 170 protruding in the opposite direction to the back member 3. The wall portion 170 defines a caulking hole 180 in the center, and has an annular groove 200 around it. The annular groove 200 may be formed simultaneously with the burring process on the front member 2, or may be processed as a pre-process or a post-process of the burring process. On the other hand, a caulking projection 190 is formed on the bottom of the recess 9 of the back member 3 by cylindrical drawing. The caulking protrusion 190 protrudes in the direction of the front member 2, and is formed at a position where the caulking protrusion 190 fits into the caulking hole 180 when the front member 2 and the back member 3 are overlapped. An annular groove 210 having a shape that fits into the annular groove 200 of the front member 2 is formed around the crimping protrusion 190 of the back member 3, and when the crimping protrusion 190 is fitted into the crimping hole 180, the annular groove 210 is formed. An annular groove 200 is configured to be fitted inside. In this state, the leading end portion of the caulking projection 190 protrudes from the wall portion 170 of the caulking hole 180, so that the deforming portion 190a is formed by pressing the leading end portion. The peripheral portion of the deformed portion 190a is double-folded to form a disk shape as a whole. The deformed portion 190 a has its double-folded peripheral edge pressed against the end surface of the wall 170 without crushing the wall 170. Thereby, the front member 2 and the back member 3 are fastened firmly. At this time, the surface of the deformed portion 190a and the surface of the front member 2 are configured to be flush with each other.
[0026]
17 and 18 show a deformation mode of the caulking portion 140 shown in FIGS. 15 and 16, and a plurality of pressing portions 190b are formed in the radial direction on the deforming portion 190a of the caulking portion 140. ing. By forming the pressing portion 190b, the strength of the deformed portion 190a can be improved, so that the fastening strength of the crimping portion 140 can be improved. A single pressing portion as shown in FIGS. 10 and 11 can be formed instead of the pressing portion 190b arranged in the radial direction.
[0027]
As shown in FIG. 13, it is desirable that the inclination angle α of the side wall 10e of the recess 10 with respect to the normal N of the bottom surface 10a of the recess 10 is as acute as possible. The reason is that, as described above, when the space formed between the front member 2 and the back member 3 is filled with a filler and solidified, the inclination angle α of the side wall 10e of the recess 10 is such that the bottom surface 10a of the recess 10 is inclined. This is because as the angle with respect to the normal line N increases, a thinner portion of the filler is generated around the recess 10, which may cause a reduction in strength.
[0028]
Further, ribs similar to the reinforcing ribs 10 b and 10 c formed in the recess 10 can be formed on the bottom of the recess 13.
[0029]
And if the protrusion P is provided in each of the four corners of the back member 3 of the floor panel 1 and the recess Q that engages with these protrusions P is formed in the corresponding portion of the front member 2, when shipping from the factory, etc. When the floor panels 1 are stacked, the stacked floor panels 1 can be prevented from shifting from each other.
[0030]
【The invention's effect】
According to the steel sheet floor panel of the present invention, the caulking joint portion for fastening the front member and the back member has the wall portion defining the caulking hole and the deformed portion pressed against the end surface of the wall portion. And since this deformation | transformation part has an engagement part bent twice with respect to the end surface of a wall surface, it has high coupling | bonding strength. Further, since the wall portion defining the caulking hole constitutes a rib structure that adds strength around the caulking hole, deformation of the caulking hole is prevented, and the bonding strength at the caulking coupling portion can be improved and the floor panel The strength of can be improved.
[0031]
In addition, by forming one or a plurality of pressing portions on the end face of the deformed portion, the strength of the deformed portion can be further improved. Thereby, the caulking bond strength can be further improved.
[0032]
And the load-bearing intensity | strength of a steel plate floor panel can be improved significantly by filling a filler in the space formed between the front member and back member of a steel plate floor panel.
[Brief description of the drawings]
FIG. 1 is a back view of an embodiment of a floor panel according to the present invention.
FIG. 2 is a right side view of the floor panel of FIG.
FIG. 3 is a side view of the floor panel of FIG. 1 as viewed from below.
4 is a cross-sectional view taken along the line AA of the floor panel in FIG. 1. FIG.
FIG. 5 is a half top view of the floor panel of FIG. 1;
6 is a cross-sectional view taken along the line DD in FIG. 1. FIG.
7 is a cross-sectional view taken along line EE of FIG.
FIG. 8 is a cross-sectional view of another embodiment of a caulking joint.
9 is a plan view of FIG. 8. FIG.
FIG. 10 is a cross-sectional view of still another embodiment of the crimping joint.
FIG. 11 is a plan view of FIG. 10;
FIG. 12 is a plan view showing a change mode of the concave portion of the floor panel of the present invention.
13 is a cross-sectional view taken along line BB in FIG.
14 is a cross-sectional view taken along the line CC of FIG.
FIG. 15 is a cross-sectional view of still another embodiment of the crimping joint.
16 is a plan view of FIG. 15. FIG.
17 is a cross-sectional view of a modification of the caulking coupling portion in FIG.
18 is a plan view of the caulking coupling portion of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor panel 2 Upper member 2d Folding part 3 Lower member 4 Opening part 5 for wiring drawing Out peripheral edge 5a Peripheral rib curved part 6, 7 Diagonal rib 8 Central rib 9 Intermediate rib 10 Recessed part 11 Lower rib 12 Central rib 13 Concave portions 14, 15, 140 Caulking portions 14A, 190a Deformed portions 14b, 14B, 190b Pressing portions 16, 160 Contact portions 17, 170 Wall portions 18, 180 Caulking holes 19, 190 Caulking projections 200, 210 Annular grooves

Claims

In the steel plate floor panel, comprising a steel plate front member, a steel plate back member integrated with the front member, and a space formed between the front member and the back member, A caulking hole defined by a wall projecting in a direction opposite to the front member is formed at a contact portion of the member with respect to the front member, and a caulking protrusion formed on the front member is inserted into the caulking hole. A deformed portion having a diameter larger than that of the caulking hole is formed at a tip portion protruding from the wall portion of the caulking protrusion, and the front member and the back member are integrated by pressing the deformed portion against an end surface of the wall portion. Steel sheet floor panel, characterized in that

In the steel sheet floor panel, comprising a steel plate front member, a steel plate back member integrated with the front member, and a space formed between the front member and the back member, A caulking hole defined by a wall protruding in the direction of the front member is formed at a contact portion of the member with respect to the back member, and a caulking protrusion protruding from the back member is inserted into the caulking hole, A deformed portion having a diameter larger than that of the caulking hole is formed at a tip portion protruding from the wall portion of the caulking projection, and the back member and the front member are integrated by pressing the deformed portion against an end surface of the wall portion. A steel steel floor panel characterized by that.

The steel plate floor panel according to claim 1 or 2, wherein the contact portion between the front member and the back member includes a contact portion between a peripheral portion of the front member and a peripheral portion of the back member, and the contact The said steel plate floor panel which comprises the said crimping | compression-bonding part in a location.

The steel plate floor panel according to any one of claims 1 to 3, wherein one or a plurality of pressing portions are formed on an end face of the deformed portion.

The steel plate floor panel according to claim 4, wherein one pressing portion is formed at a central portion of an end face of the deformed portion.

The steel plate floor panel according to claim 4, wherein the pressing portion is formed radially at a constant interval from an end face of the deformed portion.

The steel plate floor panel according to any one of claims 1 to 6, wherein the space formed between the front member and the back member is filled with a filler. .