JP3591452B2

JP3591452B2 - Horizontal stacking table

Info

Publication number: JP3591452B2
Application number: JP2000353528A
Authority: JP
Inventors: 浩一森貞; 宗一郎永島; 義昭小田
Original assignee: 株式会社イトーキクレビオ
Priority date: 2000-11-20
Filing date: 2000-11-20
Publication date: 2004-11-17
Anticipated expiration: 2020-11-20
Also published as: JP2002153328A

Description

【０００１】
【発明の属する技術分野】
本発明は、水平スタッキングテーブルに係わり、更に詳しくは脚部に上下回動可能に枢着した天板を水平状態と立起状態とに保持し、天板が立起状態で前後方向にスタッキングが可能な水平スタッキングテーブルに関するものである。
【０００２】
【従来の技術】
従来、脚部の上端に天板の後部を上下回動可能に枢着するとともに、前記天板を水平状態と前部を跳ね上げた立起状態とに保持し、天板が立起状態で前後方向にスタッキングが可能な水平スタッキングテーブルは各種提供されている。この種の水平スタッキングテーブルは、脚部の構造が前後に重なるように工夫されたものであり、天板は立起状態で前後に重なるようになっている。
【０００３】
例えば、両側脚部に上下回動可能に天板を取付け、該天板の立起回転に伴って両側脚部が回転変位して複数のテーブルを前後にスタッキング可能としてなる折畳み式テーブルは、実公昭５６−３７６１９号公報として既に提供されている。この公報記載の折畳み式テーブルは、天板を水平状態から立起状態に回転させる折畳み動作に伴って、前記脚部を約４５°だけ内向きに回転させて前後にスタッキングできるように変形させる構造のものである。この種の脚部を変形させる構造のものは機構的に複雑になってコスト高になる。
【０００４】
また、前記天板を水平状態と立起状態とに支持する構造は、脚部と天板との枢着部においてその回転角度を制限する構造のものが多く、高い支持強度を出すために枢着部は頑丈な構造となっていた。しかし、脚部と天板との枢着部を頑丈な構造にしても、基本的には天板が片持ち状態で支持されているので、上下のガタツキを完全に抑制することができないばかりでなく、コスト高となっていた。
【０００５】
尚、水平スタッキングテーブルではないが、天板の前部を持上げた立起状態にステーで支持する構造として、実公昭５８−３７３２７号公報には、脚台の上部後端に天板の後端を上下回動可能に枢着するとともに、脚台内の両側に前後方向に延び下縁に所定間隔毎に係合凹所を形成したスリットを設け、天板の前後中間部両側にステーを枢着し、該両ステーの下端部を前記両スリットに貫通したロッドの両端部に連結するとともに、該ロッドの端部にノブを螺着した構造のものが開示されている。この場合、前記ロッドを所定の係合凹所に係合させて、天板を所定の角度に傾斜させた状態で前記ノブを締付けてその状態を固定するものである。
【０００６】
【発明が解決しようとする課題】
本発明が前述の状況に鑑み、解決しようとするところは、前後にスタッキング可能な脚部の上端に天板の後部を上下回動可能に枢着し、天板が立起状態で前後方向にスタッキングが可能な水平スタッキングテーブルにおいて、天板を水平状態と立起状態とに簡単な機構にてガタツキなく確実に支持することができるとともに、天板を水平状態と立起状態との間でスムーズに変化させることができる水平スタッキングテーブルを提供する点にある。
【０００７】
【課題を解決するための手段】
本発明は、前述の課題解決のために、前後にスタッキング可能な脚部の上端に天板の後部を上下回動可能に枢着するとともに、前記脚部と天板前部間に設けたステーによって天板を水平状態と前部を跳ね上げた立起状態とに保持し、天板が立起状態で前後方向にスタッキングが可能な水平スタッキングテーブルであって、前記脚部の天板枢着部より前下方位置に横設した水平杆に前記ステーの基端部を回動可能に枢着するとともに、該ステーを跳ね上げ方向に弾性付勢し、前記天板の下面前部に前後方向に取付けた案内部材に、上方へ湾曲した案内部と該案内部の前後端に上方へ切れ込んだ係合部とからなるガイド溝を形成し、前記ステーの先端部に設けた摺動部を前記ガイド溝内にスライド係合し、前記ステーの摺動部がガイド溝の前方係合部に係合した状態で前記天板を水平状態に支持するとともに、摺動部が後方係合部に係合した状態で前記天板を立起状態に支持してなる水平スタッキングテーブルを構成した。
【０００８】
ここで、前記ステーは左右に一対設け、それに応じて前記案内部材を天板下面の左右に一対設けるとともに、各案内部材の対向面側に対称に前記ガイド溝を形成し、前記両ステーの先端部に渡設した連結杆の両端部に形成した摺動部を前記各ガイド溝にスライド係合してなることが好ましい。
【０００９】
また、前記天板が水平状態のときの前記ステーの弾性付勢力は該天板が跳ね上がらない程度の強さに設定されているものである。
【００１０】
そして、前記ステーの基端部にヒンジ部材を取付け、該ヒンジ部材は前記水平杆を包囲して回動可能に連結する軸受部を有するとともに、該軸受部の内周面に円周方向の溝部を形成し、該溝部内に収容し且つ前記水平杆に巻回した引張りコイルばねの一端を該水平杆に固定するとともに、他端を溝部内の適所又はステーの先端部に固定し、当該ヒンジ部材にてステーを回動可能に水平杆に連結するとともに、前記引張りコイルばねにてステーを跳ね上げる方向へ弾性付勢してなることがより好ましい。
【００１１】
【発明の実施の形態】
次に本発明の実施の形態を添付図面に基づき更に詳細に説明する。図１〜図４は本発明に係る水平スタッキングテーブルＡを示し、図中符号１は脚部、２は天板、３はステー、４は枢着部、５はヒンジ部材、６は案内部材をそれぞれ示している。
【００１２】
本発明に係る水平スタッキングテーブルＡは、前後にスタッキング可能な構造を有する脚部１の上端に天板２の後部を上下回動可能に枢着するとともに、前記脚部１と天板２の前部間に設けたステー３によって天板２を水平状態と前部を跳ね上げた立起状態とに保持し、天板２が立起状態で前後方向にスタッキングが可能なものである。
【００１３】
更に詳しくは、前記水平スタッキングテーブルＡは、前記脚部１の天板枢着部４より前下方位置に横設した水平杆７に前記ステー３の基端部をヒンジ部材５にて回動可能に枢着するとともに、該ステー３を跳ね上げ方向に弾性付勢し、前記天板２の下面前部に前後方向に取付けた案内部材６に、上方へ湾曲した案内部８Ａと該案内部８Ａの前後端に上方へ切れ込んだ係合部８Ｂ，８Ｃとからなるガイド溝８を形成し、前記ステー３の先端部に設けた摺動部９を前記ガイド溝８内にスライド係合し、前記ステー３の摺動部９がガイド溝の前方係合部８Ｂに係合した状態で前記天板２を水平状態に支持するとともに、摺動部９が後方係合部８Ｃに係合した状態で前記天板２を立起状態に支持してなるものである。
【００１４】
更に、前記脚部１は、複数の鋼管で構成されており、左右両側に後方へ湾曲しながら傾斜した前脚杆１０の上端間に支持杆１１を渡設するとともに、該支持杆１１より下方で若干前方位置に前記水平杆７を渡設し、両前脚杆１０，１０の間隔よりも狭く設定した左右両側の後脚杆１２，１２の上端を前記水平杆７の両端部に溶着し、更に前記水平杆７より下方位置で前記前脚杆１０と後脚杆１２とを補強杆１３でそれぞれ連結した構造となっている。そして、前後にスタッキングする場合には、図４に示すように、前方に位置する水平スタッキングテーブルＡの脚部１の後脚杆１２，１２が、後方に位置する水平スタッキングテーブルＡの脚部１の前脚杆１０，１０の間に挿入された状態となる。また、前記両前脚杆１０，１０と前記両後脚杆１２，１２の下端にはキャスター１４，…が取付けられている。更に、前記支持杆１１には、幕板１５の上端が取付けられ、該幕板１５の下端は前記後脚杆１２，１２の背面に当止されている。
【００１５】
本実施形態では、前記ステー３，３を左右に一対設け、それに応じて前記案内部材６，６を天板２の下面の左右に一対設けるとともに、各案内部材６の対向面側に対称に前記ガイド溝８を形成し、前記両ステー３，３の先端部に渡設した連結杆１６の両端部に形成した摺動部９，９を前記各ガイド溝８，８にスライド係合している。また、本実施形態では、前記両案内部材６，６を利用して、天板２の下方にフレーム状の棚受部１７を取付けている。
【００１６】
前記ガイド溝８は、上方へ緩やかに湾曲させて案内部８Ａを形成することで、前記ステー３の状端部の摺動部９をスムーズに案内することができるとともに、前記案内部材６の上下幅を小さくすることが可能となる。また、前記案内部８Ａの前後両端から上方へ前方係合部８Ｂと後方係合部８Ｃを切り込み形成しているが、これら係合部８Ｂ，８Ｃの深さは前記摺動部９を形成する連結杆１６の直径よりも大きく設定している。
【００１７】
次に、図５〜図１０に基づいて、前記ヒンジ部材５を説明する。本実施形態では、このヒンジ部材５の内部に前記ステー３を跳ね上げ方向に弾性付勢するためのばね機構を内蔵させている。つまり、前記ヒンジ部材５は、前記ステー３の基端部を連結するための取付部１８と、前記水平杆７を包囲して回動可能に連結する軸受部１９を有するとともに、該軸受部１９の内周面に円周方向の溝部２０を形成し、該溝部２０内に収容し且つ前記水平杆７に巻回した引張りコイルばね２１の一端２１Ａを該水平杆７に固定するとともに、他端２１Ｂを溝部２０内の適所又はステー３の先端部に固定した構造のものである。そして、当該ヒンジ部材５にてステー３を回動可能に水平杆７に連結するとともに、前記引張りコイルばね２１にてステー３を跳ね上げる方向へ弾性付勢するのである。ここで、前記天板２が水平状態のときの前記ステー３の弾性付勢力は、該天板２が跳ね上がらない程度の強さに設定されている。
【００１８】
更に詳しくは、前記ヒンジ部材５は、図７〜図１０に示すように、合成樹脂製で一体成形した部材であり、中央部の薄肉部２２で連設された第１ヒンジ部２３と第２ヒンジ部２４との二つ割構造となっている。各ヒンジ部２３，２４の遊端部には互いに重合した状態で前記取付部１８を形成する半割取付部２５と半割取付部２６とを有するとともに、各半割取付部２５，２６にはステー３を取付ける取付溝２７，２８を形成し、且つ取付溝２７，２８に貫通した取付孔２９，３０を形成している。また、各ヒンジ部２３，２４の薄肉部２２寄り部分には、前記水平杆７を回動可能に包持する半割軸受溝３１，３２を形成するとともに、該半割軸受溝３１，３２の軸方向中央部に前記溝部２０，２０を形成し、更に薄肉部２２に連続した接合部３３，３４には互いに係合する突起３５と凹部３６が形成されている。また、前記半割取付部２５の取付溝２７と半割軸受溝３１の境界には、前記ステー３の基端を当止する突片３７を形成している。そして、前記各ヒンジ部２３，２４を薄肉部２２に屈曲させて重合させると図１０に示すようにヒンジ部材５が構成される。
【００１９】
前記ヒンジ部材５を用いてステー３を水平杆７に枢着し且つ弾性付勢するには、先ず各ヒンジ部２３，２４を開いた状態で、ステー３の基端部を前記取付溝２７に係合させ、外側から固定ネジ３８を取付孔２９とステー３に貫通させ、一方、前記引張りコイルばね２１の一端２１Ａを前記水平杆７にネジ３９で固定し、そして該引張りコイルばね２１をヒンジ部２３の溝部２０内に受け入れながら半割軸受溝３１を水平杆７に当接し、それから引張りコイルばね２１の他端２１Ｂを前記固定ネジ３８に係止するとともに、ヒンジ部２４をヒンジ部２３に重合させて該ヒンジ部２４の溝部２０内に引張りコイルばね２１を受け入れ且つ半割軸受溝３２で水平杆７を包囲し、更に前記固定ネジ３８をヒンジ部２４の取付孔３０に貫通させ且つステー３の基端部を前記取付溝２８に係合させた後、ナット４０で固定ネジ３８を締付けるのである。
【００２０】
この場合、前記ヒンジ部材５は、引張りコイルばね２１の一端２１Ａを前記水平杆７に固定したネジ３９によって、少なくとも引張りコイルばね２１の一端部は水平杆７に沿った方向に移動することはないので、当該ヒンジ部材５が、水平杆７の軸方向に移動することなく回動可能に取付けられる。また、前記ヒンジ部材５に内蔵された前記引張りコイルばね２１によって、前記ステー３の先端部を跳ね上げる方向に弾性付勢されるのである。この弾性付勢力は、前記引張りコイルばね２１のばね定数、長さ、水平杆７への固定位置を調節することによって、適宜な値に設定可能である。
【００２１】
前記前記ヒンジ部材５に内蔵された前記引張りコイルばね２１によって跳ね上げ方向へ弾性付勢されたステー３の摺動部９は、前記ガイド溝８の上縁に常時押し当てられた状態となる。つまり、前記天板２が水平状態では、前方係合部８Ｂに摺動部９が係合する方向に弾性付勢され、天板２の前部を持上げて枢着部４を中心に回動させた際には、前方係合部８Ｂと摺動部９の係合が外れてガイド部８Ａの上縁を摺動部９がスライドしながら移動し、最も天板２を起こして傾斜させた立起状態では後方係合部８Ｃに摺動部９が係合する方向に弾性付勢されている。この天板２の立起状態では、前記ステー３が跳ね上げ方向に弾性付勢されているので、該ステー３を手前に引かない限り、後方係合部８Ｃと摺動部９との係合が外れることはなく、即ち天板２を立起状態で安定に支持することができる。
【００２２】
また、天板２を立起状態から水平状態へ移すには、前記ステー３の中間部に側設したレバー４１を持って弾性付勢力に抗して手前に引き、後方係合部８Ｃと摺動部９との係合を外すと、天板２の自重によって該天板２は下方へ回動し、その回動速度はステー３が跳ね上げ力で減速され、摺動部９が前方係合部８Ｂに至って係合すると、もはや天板２は下方へ回動せず水平状態に支持されるのである。
【００２３】
ここで、前記天板２の枢着部４を中心とする回動動作と、ステー３のヒンジ部材５を中心とする回動動作の関係を、前記ガイド部８Ａが直線の場合と比較して説明する。前記天板２を水平状態から立起状態に移行する際には、天板２の回転角度が大きくなるとステーの回転角度の変化はガイド部８Ａの上方湾曲のため大きくなり、摺動部９が円弧状のガイド部８Ａの頂部を過ぎると逆に小さくなる。尚、前記天板２が立起状態から水平状態へ移行する際には、前述と逆の動作になる。また、前記天板２の自重による下方回転のモーメントは、立起状態の場合に最も小さく、水平状態の場合に最も大きくなる。また、前記ステー３の弾性付勢力は、天板２が立起状態の場合に最も大きく、水平状態の場合に最も小さくなる。そのため、天板２が立起状態から下方へ回動する途中まで天板２の自重では改定しないように前記ステー３の弾性付勢力を設定することが可能であり、その場合、天板２を下方へ回動途中で、前記ステー３の弾性付勢力より前記天板２の自重による下方回転のモーメントが逆転し、その後は天板２は自重によって水平状態に復帰するのである。
【００２４】
最後に、前記天板２を脚部１の支持杆１１に枢着した枢着部４の構造と、前記幕板１５の支持構造を図１１〜図１３に基づいて説明する。前記枢着部４を構成する軸受部材４２は、両端部に天板２下面への取付片４３，４３を有するとともに、中央部に上方開放した軸受部４４を有する側面視略ひ字形の部材である。そして、前記軸受部４４を前記支持杆１１にその開放側から両取付片４３，４３を拡開しながら外嵌し、該軸受部４４の弾性復元力を利用して前記支持杆１１に密嵌させ、ガタツキない回動動作を実現する。また、前記軸受部材４２の軸受部４４の軸方向中央部には、前方側の取付片４３から軸受部４４の円周方向途中部まで開口４５を形成し、前記支持杆１１を露出させ、該開口４５内に支持部材４６の半円筒状の固定部４７を挿入し、前記支持杆１１にネジ止めする。ここで、前記軸受部材４２の固定部４７の円周方向一端は、図１３に示すように前記天板２が立起状態となった際に開口４５の端部に当接し、それ以上の回動を規制している。また、前記軸受部材４２の固定部４７の円周方向他端は、図１２に示した例では天板２が水平状態のときに他方の取付片４３の端部と離れているが、これらが当接するように設定することも可能である。
【００２５】
そして、前記支持部材４６の突出端部４８には、前記幕板１５の上縁を嵌合し、適宜ネジ止めしたホルダー４９を水平な支軸５０で取付け、幕板１５の下部を前後に回動可能に支持している。尚、前記幕板１５の下端部を前記後脚杆１２に固定し、前後に揺動しないようにすることも可能である。
【００２６】
【発明の効果】
以上にしてなる請求項１に係る発明の水平スタッキングテーブルは、前記脚部の天板枢着部より前下方位置に横設した水平杆に前記ステーの基端部を回動可能に枢着するとともに、該ステーを跳ね上げ方向に弾性付勢し、前記天板の下面前部に前後方向に取付けた案内部材に、上方へ湾曲した案内部と該案内部の前後端に上方へ切れ込んだ係合部とからなるガイド溝を形成し、前記ステーの先端部に設けた摺動部を前記ガイド溝内にスライド係合し、前記ステーの摺動部がガイド溝の前方係合部に係合した状態で前記天板を水平状態に支持するとともに、摺動部が後方係合部に係合した状態で前記天板を立起状態に支持してなるので、天板を水平状態と立起状態とに簡単な機構にてガツツキなく確実に支持することができるとともに、天板を水平状態と立起状態との間でスムーズに変化させることができる。
【００２７】
請求項２によれば、左右のステーが一体となって連動し、天板の下面両側部を支持するので、天板を立起状態にした場合に枢着部に捩れを生じさせることなく安定に支持することができる。
【００２８】
請求項３によれば、天板を水平状態において何らストッパーを設けなくてもその状態を維持することができ、また天板を前部を持上げて立起状態へ移行させる際には、ステーの弾性付勢力が天板に自重による下方回転のモーメントの一部を相殺するので、その動作が軽くなる。
【００２９】
請求項４によれば、ヒンジ部材内にステーを跳ね上げ方向へ弾性付勢する引張りコイルばねを内蔵しているので、該引張りコイルばねが露出しないので外観性に優れているとともに、安全性がより高められ、またヒンジ部材も水平杆の時期方向への移動が自動的に規制された状態で簡単に取付けることができる。
【図面の簡単な説明】
【図１】本発明に係る水平スタッキングテーブルの側面図である。
【図２】同じく天板の動作を示す部分側面図である。
【図３】同じく正面図である。
【図４】複数の水平スタッキングテーブルを前後にスタッキングした状態を示す側面図である。
【図５】水平杆にステーを枢着するヒンジ部材と弾性付勢機構を示し、天板が水平状態の場合の部分断面図である。
【図６】同じく天板が立起状態の場合の部分断面図である。
【図７】ヒンジ部材の展開図である。
【図８】同じく展開状態のヒンジ部材の側面図である。
【図９】同じく展開状態のヒンジ部材の断面側面図である。
【図１０】同じく重合状態のヒンジ部材の断面側面図である。
【図１１】脚部と天板との枢着部と幕板の取付構造を示す部分分解斜視図である。
【図１２】同じく天板が水平状態の場合の部分断面図である。
【図１３】同じく天板が立起状態の場合の部分断面図である。
【符号の説明】
Ａ水平スタッキングテーブル
１脚部２天板
３ステー４枢着部
５ヒンジ部材６案内部材
７水平杆８ガイド溝
８Ａガイド部８Ｂ前方係合部
８Ｃ後方係合部９摺動部
１０前脚杆１１支持杆
１２後脚杆１３補強杆
１４キャスター１５幕板
１６連結杆１７棚受部
１８取付部１９軸受部
２０溝部２１引張りコイルばね
２１Ａ一端２１Ｂ他端
２２薄肉部２３，２４ヒンジ部
２５，２６半割取付部２７，２８取付溝
２９，３０取付孔３１，３２半割軸受溝
３３，３４接合部３５突起
３６凹部３７突片
３８固定ネジ３９ネジ
４０ナット４１レバー
４２軸受部材４３取付片
４４軸受部４５開口
４６支持部材４７固定部
４８突出端部４９ホルダー
５０支軸[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a horizontal stacking table, and more specifically, holds a top plate pivotally attached to legs in a vertically rotatable state in a horizontal state and an upright state, and stacks in a front-rear direction when the top plate is in an upright state. It concerns a possible horizontal stacking table.
[0002]
[Prior art]
Conventionally, a rear portion of the top plate is pivotally attached to the upper ends of the legs so as to be vertically rotatable, and the top plate is held in a horizontal state and an upright state in which the front portion is flipped up. Various horizontal stacking tables capable of stacking in the front-rear direction are provided. This type of horizontal stacking table is devised such that the structure of the leg portions overlaps front and back, and the top plate overlaps front and back in an upright state.
[0003]
For example, a folding table in which a top plate is attached to both leg portions so as to be vertically rotatable, and both leg portions are rotationally displaced in accordance with the upright rotation of the top plate so that a plurality of tables can be stacked back and forth, It is already provided as Japanese Patent Publication No. 56-37619. The folding table described in this publication has a structure in which the legs are rotated inward by about 45 ° to be stacked back and forth with a folding operation of rotating the top plate from a horizontal state to an upright state. belongs to. This type of structure that deforms the legs is mechanically complicated and increases the cost.
[0004]
Further, the structure for supporting the top plate in a horizontal state and an upright state is often a structure in which a rotation angle is limited at a pivot portion between a leg and the top plate. The fitting had a sturdy structure. However, even if the joint between the leg and the top plate is made sturdy, the top plate is basically supported in a cantilever state, so that it is not possible to completely suppress the vertical rattling. And the cost was high.
[0005]
Note that, although not a horizontal stacking table, Japanese Utility Model Publication No. 58-37327 discloses a structure in which the front portion of the top plate is lifted up and the stay is supported by a stay. And a slit extending in the front-rear direction on both sides inside the footrest and forming engagement recesses at predetermined intervals on the lower edge. A structure is disclosed in which the lower ends of the stays are connected to both ends of a rod penetrating the slits, and a knob is screwed to an end of the rod. In this case, the knob is tightened in a state where the rod is engaged with a predetermined engagement recess and the top plate is inclined at a predetermined angle, and the knob is fixed in that state.
[0006]
[Problems to be solved by the invention]
In view of the above situation, the present invention seeks to solve the problem by pivotally connecting the rear of the top plate to the upper ends of the legs that can be stacked back and forth so as to be vertically rotatable, and moving the top plate up and down in the front-rear direction. In a horizontal stacking table that can be stacked, the top plate can be securely supported between a horizontal state and an upright state with a simple mechanism without rattling, and the top plate can be smoothly moved between the horizontal state and the upright state Another object of the present invention is to provide a horizontal stacking table that can be changed to a horizontal position.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention pivotally connects a rear portion of the top plate to the upper end of a leg portion that can be stacked back and forth so as to be vertically rotatable, and a stay provided between the leg portion and a front portion of the top plate. A horizontal stacking table which holds a top plate in a horizontal state and an upright state where a front portion is flipped up, and is capable of stacking in a front-rear direction when the top plate is in an upright state. The base end of the stay is pivotally connected to a horizontal rod laid horizontally at a lower front position, and the stay is elastically urged in a flip-up direction. The attached guide member has a guide groove formed by an upwardly curved guide portion and an engagement portion cut upward at the front and rear ends of the guide portion, and a sliding portion provided at a distal end portion of the stay is provided by the guide. The stay slides into the groove, and the sliding portion of the stay is engaged with the front of the guide groove. A horizontal stacking table configured to support the top plate in a horizontal state in a state in which the top plate is engaged with the sliding portion and to support the top plate in an upright state in a state in which a sliding portion is engaged with the rear engagement portion. .
[0008]
Here, a pair of the stays are provided on the left and right, and a pair of the guide members are provided on the left and right of the lower surface of the top plate accordingly, and the guide grooves are formed symmetrically on the opposing surfaces of the respective guide members. It is preferable that sliding portions formed at both ends of the connecting rod provided across the portions are slidably engaged with the respective guide grooves.
[0009]
Further, the elastic biasing force of the stay when the top plate is in a horizontal state is set to such a strength that the top plate does not jump up.
[0010]
A hinge member is attached to a base end of the stay, and the hinge member has a bearing portion surrounding the horizontal rod and rotatably connected thereto, and a circumferential groove portion on an inner peripheral surface of the bearing portion. And fixing one end of a tension coil spring housed in the groove and wound on the horizontal rod to the horizontal rod, and fixing the other end to an appropriate position in the groove or the tip of a stay, and It is more preferable that the stay is rotatably connected to the horizontal rod by a member, and that the tension coil spring resiliently urges the stay in a direction of flipping up the stay.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 to 4 show a horizontal stacking table A according to the present invention, wherein reference numeral 1 denotes a leg, 2 denotes a top plate, 3 denotes a stay, 4 denotes a pivot, 5 denotes a hinge member, and 6 denotes a guide member. Each is shown.
[0012]
The horizontal stacking table A according to the present invention has a rear portion of a top plate 2 pivotally attached to the upper end of a leg portion 1 having a structure capable of stacking back and forth so as to be vertically rotatable, and a front portion between the leg portion 1 and the top plate 2. The top plate 2 is held in a horizontal state and a standing state in which the front part is flipped up by a stay 3 provided between the sections, and stacking in the front-rear direction is possible with the top plate 2 standing up.
[0013]
More specifically, the horizontal stacking table A is configured such that the base end of the stay 3 can be rotated by a hinge member 5 on a horizontal rod 7 provided horizontally below the top plate pivot 4 of the leg 1. The stay 3 is elastically urged in the direction of flipping up, and the guide member 6 attached to the front part of the lower surface of the top plate 2 in the front-rear direction has a guide part 8A curved upward and the guide part 8A. A guide groove 8 formed of engaging portions 8B and 8C cut upward is formed at the front and rear ends of the stay, and a sliding portion 9 provided at the distal end of the stay 3 is slidably engaged in the guide groove 8, The top plate 2 is supported horizontally in a state where the sliding portion 9 of the stay 3 is engaged with the front engaging portion 8B of the guide groove, and in a state where the sliding portion 9 is engaged with the rear engaging portion 8C. The top plate 2 is supported in an upright state.
[0014]
Further, the leg 1 is formed of a plurality of steel pipes, and a support rod 11 is provided between the upper ends of the front leg rods 10 which are curved rearward on both left and right sides and inclined, and are provided below the support rod 11. The horizontal rod 7 is provided at a position slightly forward, and the upper ends of the left and right rear leg rods 12, which are set to be narrower than the distance between the front leg rods 10, are welded to both ends of the horizontal rod 7. At a position below the horizontal rod 7, the front leg rod 10 and the rear leg rod 12 are connected by reinforcing rods 13, respectively. In the case of stacking back and forth, as shown in FIG. 4, the rear legs 12, 12 of the legs 1 of the horizontal stacking table A located at the front are connected to the legs 1 of the horizontal stacking table A located at the rear. Is inserted between the front legs 10, 10. Casters 14,... Are attached to the lower ends of the front leg rods 10, 10 and the rear leg rods 12, 12, respectively. Further, an upper end of a curtain plate 15 is attached to the support rod 11, and a lower end of the curtain plate 15 is abutted on the rear surfaces of the rear leg rods 12, 12.
[0015]
In the present embodiment, a pair of the stays 3 and 3 are provided on the left and right sides, and a pair of the guide members 6 and 6 are provided on the left and right sides of the lower surface of the top plate 2 accordingly. A guide groove 8 is formed, and sliding portions 9, 9 formed at both ends of a connecting rod 16 provided at the distal ends of the stays 3, 3 are slidably engaged with the guide grooves 8, 8. . Further, in the present embodiment, a frame-shaped shelf receiving portion 17 is mounted below the top plate 2 using the two guide members 6 and 6.
[0016]
By forming the guide portion 8A by gently curving the guide groove 8 upward, the sliding portion 9 at the end of the stay 3 can be smoothly guided, and the guide member 6 can be moved up and down. The width can be reduced. The front engaging portion 8B and the rear engaging portion 8C are cut upward from both front and rear ends of the guide portion 8A, and the depth of the engaging portions 8B and 8C forms the sliding portion 9. It is set larger than the diameter of the connecting rod 16.
[0017]
Next, the hinge member 5 will be described with reference to FIGS. In the present embodiment, a spring mechanism for elastically biasing the stay 3 in the flip-up direction is built in the hinge member 5. That is, the hinge member 5 has a mounting portion 18 for connecting the base end portion of the stay 3 and a bearing portion 19 for surrounding the horizontal rod 7 and rotatably connecting the same. A circumferential groove 20 is formed on the inner peripheral surface of the tension rod spring 21. One end 21A of a tension coil spring 21 housed in the groove 20 and wound around the horizontal rod 7 is fixed to the horizontal rod 7 while the other end is fixed. 21B is a structure in which 21B is fixed at an appropriate position in the groove 20 or at the tip of the stay 3. The stay 3 is rotatably connected to the horizontal rod 7 by the hinge member 5, and the stay 3 is elastically urged by the tension coil spring 21 in the direction of jumping up. Here, the elastic biasing force of the stay 3 when the top plate 2 is in a horizontal state is set to such a strength that the top plate 2 does not jump up.
[0018]
More specifically, as shown in FIGS. 7 to 10, the hinge member 5 is a member made of synthetic resin and integrally formed, and includes a first hinge portion 23 connected to a thin portion 22 at a central portion and a second hinge portion 23. It has a split structure with the hinge part 24. The free ends of the hinge portions 23 and 24 have a half mounting portion 25 and a half mounting portion 26 which form the mounting portion 18 in a state of being overlapped with each other, and each of the half mounting portions 25 and 26 has Mounting grooves 27 and 28 for mounting the stay 3 are formed, and mounting holes 29 and 30 penetrating the mounting grooves 27 and 28 are formed. Further, half bearing grooves 31 and 32 for rotatably enclosing the horizontal rod 7 are formed in portions of the hinge portions 23 and 24 near the thin portion 22, and the half bearing grooves 31 and 32 are formed. The grooves 20, 20 are formed at the center in the axial direction, and furthermore, projections 35 and recesses 36 which engage with each other are formed at joints 33, 34 which are continuous with the thin portion 22. A projection 37 is formed at the boundary between the mounting groove 27 of the half mounting portion 25 and the half bearing groove 31 to stop the base end of the stay 3. When the hinge portions 23 and 24 are bent into the thin portion 22 and overlapped, the hinge member 5 is configured as shown in FIG.
[0019]
To pivot the stay 3 to the horizontal rod 7 and to elastically bias it using the hinge member 5, first, with the hinge portions 23 and 24 opened, connect the base end of the stay 3 to the mounting groove 27. And the fixing screw 38 is passed through the mounting hole 29 and the stay 3 from the outside, while one end 21A of the tension coil spring 21 is fixed to the horizontal rod 7 with a screw 39, and the tension coil spring 21 is hinged. The half bearing groove 31 comes into contact with the horizontal rod 7 while being received in the groove 20 of the portion 23, and then the other end 21 </ b> B of the tension coil spring 21 is locked to the fixing screw 38, and the hinge 24 is connected to the hinge 23. The tension coil spring 21 is received in the groove portion 20 of the hinge portion 24 by being overlapped, the horizontal rod 7 is surrounded by the half bearing groove 32, and the fixing screw 38 is passed through the mounting hole 30 of the hinge portion 24 and After 3 of the base end portion engaged with the mounting groove 28 is to tighten the fixing screw 38 with a nut 40.
[0020]
In this case, the hinge member 5 does not move at least one end of the tension coil spring 21 in the direction along the horizontal rod 7 by the screw 39 fixing one end 21A of the tension coil spring 21 to the horizontal rod 7. Therefore, the hinge member 5 is attached rotatably without moving in the axial direction of the horizontal rod 7. In addition, the tension coil spring 21 built in the hinge member 5 elastically urges the tip of the stay 3 in a direction to flip it up. This elastic biasing force can be set to an appropriate value by adjusting the spring constant, length, and fixed position of the tension coil spring 21 to the horizontal rod 7.
[0021]
The sliding portion 9 of the stay 3 elastically urged in the flip-up direction by the tension coil spring 21 built in the hinge member 5 is constantly pressed against the upper edge of the guide groove 8. That is, when the top plate 2 is in a horizontal state, the top plate 2 is elastically urged in the direction in which the sliding portion 9 is engaged with the front engagement portion 8B, and the front portion of the top plate 2 is lifted to rotate about the pivotal connection portion 4. At this time, the engagement between the front engaging portion 8B and the sliding portion 9 is disengaged, and the sliding portion 9 moves while sliding on the upper edge of the guide portion 8A, and the top plate 2 is raised and inclined most. In the standing state, the sliding portion 9 is elastically urged in the direction in which the sliding portion 9 is engaged with the rear engaging portion 8C. When the top plate 2 is in the upright state, the stay 3 is elastically urged in the flip-up direction. Therefore, unless the stay 3 is pulled forward, the engagement between the rear engaging portion 8C and the sliding portion 9 is established. Does not come off, that is, the top plate 2 can be stably supported in the upright state.
[0022]
In order to move the top plate 2 from the upright state to the horizontal state, the lever 2 provided on the intermediate portion of the stay 3 is pulled toward the front against the elastic biasing force, and slides with the rear engagement portion 8C. When the top plate 2 is disengaged from the moving portion 9, the top plate 2 pivots downward by its own weight, the rotation speed of the top plate 2 is reduced by the lifting force, and the sliding portion 9 is moved forward. When the top plate 2 is engaged with the joint 8B, the top plate 2 is no longer pivoted downward and is supported in a horizontal state.
[0023]
Here, the relationship between the pivoting operation of the top plate 2 about the pivot portion 4 and the pivoting operation of the stay 3 about the hinge member 5 will be compared with the case where the guide portion 8A is a straight line. explain. When the top plate 2 shifts from the horizontal state to the upright state, when the rotation angle of the top plate 2 increases, the change in the rotation angle of the stay increases due to the upward curvature of the guide portion 8A, and the sliding portion 9 Conversely, it becomes smaller after the top of the arc-shaped guide portion 8A. When the top plate 2 shifts from the upright state to the horizontal state, the operation is reversed. Further, the moment of downward rotation due to the weight of the top plate 2 is the smallest in the upright state and the largest in the horizontal state. The elastic biasing force of the stay 3 is largest when the top plate 2 is in the upright state, and is smallest when the top plate 2 is in the horizontal state. Therefore, it is possible to set the elastic biasing force of the stay 3 so that the top plate 2 is not revised by the own weight of the top plate 2 until the top plate 2 is pivoted downward from the standing state. During the downward rotation, the moment of downward rotation of the top plate 2 due to its own weight is reversed by the elastic biasing force of the stay 3, and thereafter the top plate 2 returns to a horizontal state by its own weight.
[0024]
Finally, the structure of the pivot portion 4 in which the top plate 2 is pivoted to the support rod 11 of the leg 1 and the support structure of the curtain plate 15 will be described with reference to FIGS. The bearing member 42 that constitutes the pivot portion 4 is a substantially rhombus-shaped member in a side view having mounting pieces 43 on the lower surface of the top plate 2 at both ends and a bearing portion 44 opened upward at the center. is there. Then, the bearing portion 44 is externally fitted to the support rod 11 from the open side thereof while the mounting pieces 43, 43 are expanded, and is tightly fitted to the support rod 11 by utilizing the elastic restoring force of the bearing portion 44. To realize a rattling rotation operation. Further, an opening 45 is formed at the axial center of the bearing portion 44 of the bearing member 42 from the front mounting piece 43 to the circumferential middle of the bearing portion 44 to expose the support rod 11. The semi-cylindrical fixing portion 47 of the support member 46 is inserted into the opening 45 and screwed to the support rod 11. Here, one end in the circumferential direction of the fixing portion 47 of the bearing member 42 comes into contact with the end of the opening 45 when the top plate 2 is in the upright state, as shown in FIG. Regulations. In the example shown in FIG. 12, the other end in the circumferential direction of the fixing portion 47 of the bearing member 42 is separated from the end of the other mounting piece 43 when the top plate 2 is in the horizontal state. It is also possible to set so as to abut.
[0025]
An upper edge of the curtain plate 15 is fitted to the protruding end 48 of the support member 46, and a holder 49 appropriately screwed is attached by a horizontal support shaft 50, and the lower portion of the curtain plate 15 is rotated back and forth. It is movably supported. Incidentally, the lower end of the curtain plate 15 may be fixed to the rear leg rod 12 so as not to swing back and forth.
[0026]
【The invention's effect】
In the horizontal stacking table according to the first aspect of the present invention, the base end of the stay is rotatably pivotally mounted on a horizontal rod laterally provided at a lower front position than the top plate pivot of the leg. At the same time, the stay is elastically urged in the direction of flipping up, and a guide member which is attached to the front of the lower surface of the top plate in the front-rear direction is provided with a guide portion curved upward and a notch cut upward at the front and rear ends of the guide portion. A guide groove formed of a mating portion, and a sliding portion provided at a tip portion of the stay is slidably engaged in the guide groove, and a sliding portion of the stay is engaged with a front engaging portion of the guide groove. In this state, the top plate is supported in a horizontal state, and the sliding plate is supported in an upright state with the sliding portion engaged with the rear engagement portion. With a simple mechanism, it can be securely supported with no looseness and the top plate It can be varied smoothly between the flat state and TatsuOkoshi state.
[0027]
According to the second aspect, since the left and right stays work together as one body and support both sides of the lower surface of the top plate, when the top plate is in an upright state, it is stable without twisting the pivot portion. Can be supported.
[0028]
According to the third aspect, the top plate can be maintained in a horizontal state without providing any stopper, and when the top plate is lifted up to move to the upright state by lifting the front portion, The elastic urging force offsets a part of the moment of downward rotation of the top plate due to its own weight, so that the operation is lightened.
[0029]
According to the fourth aspect, since the tension coil spring that elastically urges the stay in the flip-up direction is incorporated in the hinge member, the tension coil spring is not exposed, so that the appearance is excellent and the safety is improved. The height of the hinge member can be further increased, and the hinge member can be easily mounted in a state where the movement of the horizontal rod in the timing direction is automatically restricted.
[Brief description of the drawings]
FIG. 1 is a side view of a horizontal stacking table according to the present invention.
FIG. 2 is a partial side view showing the operation of the top plate.
FIG. 3 is a front view of the same.
FIG. 4 is a side view showing a state in which a plurality of horizontal stacking tables are stacked back and forth.
FIG. 5 is a partial cross-sectional view showing a hinge member for pivotally attaching a stay to a horizontal rod and an elastic biasing mechanism when a top plate is in a horizontal state.
FIG. 6 is a partial cross-sectional view when the top plate is in an upright state.
FIG. 7 is an expanded view of a hinge member.
FIG. 8 is a side view of the hinge member in the unfolded state.
FIG. 9 is a cross-sectional side view of the hinge member in the expanded state.
FIG. 10 is a cross-sectional side view of the hinge member in the overlapping state.
FIG. 11 is a partially exploded perspective view showing a mounting structure of a pivot portion between a leg and a top plate and a curtain plate.
FIG. 12 is a partial cross-sectional view when the top plate is in a horizontal state.
FIG. 13 is a partial cross-sectional view when the top plate is in an upright state.
[Explanation of symbols]
A Horizontal stacking table 1 Leg 2 Top plate 3 Stay 4 Pivot 5 Hinge 6 Guide 7 Horizontal rod 8 Guide groove 8A Guide 8B Front engaging 8C Rear engaging 9 Sliding 10 Front leg 11 Support Rod 12 Rear leg rod 13 Reinforcement rod 14 Caster 15 Curtain plate 16 Connecting rod 17 Shelf receiving part 18 Mounting part 19 Bearing part 20 Groove part 21 Tension coil spring 21A One end 21B Other end 22 Thin part 23, 24 Hinge part 25, 26 Half Attachment portions 27, 28 Attachment grooves 29, 30 Attachment holes 31, 32 Half bearing grooves 33, 34 Joints 35 Projections 36 Recesses 37 Protrusions 38 Fixing screws 39 Screws 40 Nuts 41 Lever 42 Bearing member 43 Attachment pieces 44 Bearings 45 Opening 46 Supporting member 47 Fixing part 48 Protruding end 49 Holder 50 Support shaft

Claims

The rear part of the top plate was pivotably connected to the upper ends of the legs that can be stacked back and forth so as to be vertically rotatable, and the top plate was flipped horizontally and the front part was flipped up by a stay provided between the legs and the front part of the top plate. A horizontal stacking table that can be stacked in the upright state and can be stacked in the front-rear direction with the top plate in an upright state. A guide part which pivotally attaches the base end of the stay so as to be rotatable, elastically urges the stay in the direction of flipping up, and is provided with a guide member curved upwardly on a guide member attached to the front lower surface of the top plate in the front-rear direction. And a guide groove comprising an engagement portion cut upward at the front and rear ends of the guide portion, and a sliding portion provided at a tip portion of the stay is slidably engaged in the guide groove to slide the stay. When the moving part is engaged with the front engaging part of the guide groove, Horizontal stacking table, characterized thereby supporting the state, that the sliding part is in favor of the top plate in a state engaged with the rear engagement portion TatsuOkoshi state.

A pair of the stays are provided on the left and right sides, and a pair of the guide members are provided on the left and right sides of the lower surface of the top plate in accordance with the stays. 2. The horizontal stacking table according to claim 1, wherein sliding portions formed at both ends of the provided connecting rod are slidably engaged with the respective guide grooves.

3. The horizontal stacking table according to claim 1, wherein the elastic biasing force of the stay when the top plate is in a horizontal state is set to such a strength that the top plate does not jump up.

A hinge member is attached to a base end portion of the stay, the hinge member has a bearing portion surrounding the horizontal rod and rotatably connected thereto, and has a circumferential groove formed on an inner peripheral surface of the bearing portion. Then, one end of a tension coil spring housed in the groove and wound around the horizontal rod is fixed to the horizontal rod, and the other end is fixed to an appropriate position in the groove or the tip of a stay, and The horizontal stacking table according to any one of claims 1 to 3, wherein the stay is rotatably connected to a horizontal rod, and the tension coil spring resiliently urges the stay in a direction to flip up the stay.