JP4583620B2

JP4583620B2 - Folding table

Info

Publication number: JP4583620B2
Application number: JP2001022693A
Authority: JP
Inventors: 淳一山岡
Original assignee: エビスヤ工業株式会社
Priority date: 2001-01-31
Filing date: 2001-01-31
Publication date: 2010-11-17
Anticipated expiration: 2021-01-31
Also published as: JP2002223859A

Description

【０００１】
【発明の属する技術分野】
本発明は合理的かつ体裁良く製作でき、しかも天板の支持強度を強化して、大形の折畳みテーブルに好適にするとともに、天板を円滑かつ安全に折り畳め、例えば折り畳み時の体裁を改善するようにした折畳みテーブルに関する。
【０００２】
【従来の技術】
従来、天板を折り畳み可能にしたテーブルは、例えば特開平１１−３１８５７１号公報のように、支柱の上端部に連結金具を取り付け、該金具に天板の下面に固定した下枠を回動可能に連結して構成していた。
【０００３】
しかし、この従来のテーブルは、鋼板をプレス成形して連結金具と下枠を製作しているため、成形誤差が大きく、またこれらを接触して組み付けているため、異音を生じたり折り畳み操作に円滑性を欠く問題があった。
しかも、下枠は天板の折り畳み時に内部が表出して、テーブル保管時の体裁が悪く、また天板を一対の下枠で支持しているため、天板の支持強度が概して低く、大形のテーブルに対応できない等の問題があった。
【０００４】
【発明が解決しようとする課題】
本発明はこのような問題を解決し、例えば大形の折畳みテーブルに好適で、天板の支持強度を強化するとともに、天板を円滑に折り畳め、その体裁を改善するようにした折畳みテーブルを提供することを目的とする。
【０００５】
【課題を解決するための手段】
このため、請求項１の発明は、天板の裏面に下枠を取り付け、該下枠を支柱部材または支柱の上端部に回動可能に連結した折畳みテーブルにおいて、前記下枠を内外枠の二重構造に構成し、これら内外枠を天板に一体的に取り付け、前記内枠の一部を有底構造に形成し、前記有底部を介し前記外枠の内部を隠蔽可能にして、内外枠を合理的かつ体裁良く取り付けられ、しかも天板の支持強度を強化して、大形の折畳みテーブルに好適にするとともに、天板を円滑かつ安全に折り畳め、例えば折り畳み時の体裁を改善するようにしている。
【０００６】
請求項２の発明は、前記内枠および有底部を一体成形し、内枠を均質かつ容易に製作するようにしている。したがって、例えば内枠を合成樹脂製とすれば、前記効果を容易に得られ、また天板の折り畳み操作を円滑に行なえる。
請求項３の発明は、天板の裏面に補強枠を取り付け、該補強枠の端部を前記内外枠内に係合可能に配置し、天板の支持強度を強化し、大形の折畳みテーブルに好適にしている。
請求項４の発明は、前記内枠を合成樹脂製とし、該内枠に前記支柱部材または支柱の上端部に係合可能な凸部を設け、凸部と支柱部材または支柱の上端部との係合時、凸部の弾性によって緊密な係合を促し、隣接部材の多少の誤差を許容して天板の安定化を図るようにしている。
【０００７】
【発明の実施の形態】
以下、本発明を大形の会議用テーブルに適用した図示の実施形態について説明すると、図１乃至図９において１は略楕円形の天板で、その下面に一対の補強枠２が長軸側に沿って平行に取り付けられている。
前記補強枠２は略矩形断面の鋼管で構成され、その下面の中央に図３のように凹溝３が形成され、該凹溝３に取付ビス４の頭部４ａを隠蔽して収容している。
【０００８】
前記補強枠２の両端部に下枠を構成する外枠５が補強枠２と直交して配置され、該外枠５に補強枠２の端部が挿入されている。
前記外枠５は図５，６のように鋼板を略コ字形断面に屈曲して形成され、その一方の屈曲片５ａ、実施形態では内側の屈曲片５ａの両端部に、外枠５の平坦部に亘って補強枠２の幅分の切欠孔６が形成され、前記補強枠２を側方から差し込み可能にしている。
【０００９】
図中、７は外枠５に形成した複数のビス孔で、後述する内枠側からビス８を挿入可能にしており、９は前記屈曲片５ａの中央部に形成したピン孔で、後述の枢支ピンを挿入可能にしている。
前記ピン孔９の両側に後述するロータリーダンパ取り付け用のビス孔１０と軸孔２１とが形成され、これらの各一方に後述のビスと連結軸を挿入可能にしている。
【００１０】
前記外枠５の内側に下枠を構成する内枠１１が取り付けられ、該内枠１１は図６のように前記外枠５と略同形に樹脂成形され、その両側の屈曲片１１ａ，１１ａを前記屈曲片５ａ，５ａの内面に近接配置している。
前記内枠１１の下部は、その略中央部を除いて有底部であるフレームカバー１２，１３で閉塞され、該カバー１２，１３の間に切欠部１４を形成している。
【００１１】
前記フレームカバー１２，１３は屈曲片１１ａ，１１ａと一体成形され、これらは互いに異形に成形されていて、それらの長さ方向に複数の凹孔１５〜１８が形成されている。
前記凹孔１５〜１８は前記ビス孔７の位置に対応して形成され、その底部に前記ビス８を挿入可能なビス孔１９が形成されている。前記凹孔１５〜１８の底部は平坦面に形成され、これらの平坦面は同一面上に形成されていて、その裏面を前記外枠５の内面に係合可能に配置している。
【００１２】
前記一方の屈曲片１１ａ、実施形態では内側の屈曲片１１ａの前記切欠孔６と対応位置に切欠孔２０が形成され、内枠１１内に挿入された補強枠２の端部を他方の屈曲片１１ａの内面に近接して配置している。
図中、２２は屈曲片１１ａ，１１ａの中央部に形成したピン孔で、後述の枢支ピンを挿入可能にしており、２３は軸孔で後述の連結軸を挿入可能にしている。
５２はロータリーダンパ取り付け用のビス孔で、ピン孔２２の対称位置に形成されている。
【００１３】
前記内枠１１は補強リブ２４，２５を介して補強され、このうち屈曲片１１ａ，１１ａの中央部を連結する補強リブ２５は下端部を下方に突出し、この凸部２６を天板１の使用時に支柱部材である支持ブロック２７に係合させ、その弾性を介して天板１の安定を図っている。
【００１４】
前記支持ブロック２７はアルミニウムダイカストによって略柱時計状に成形され、その下端部を支柱２８の上部に固定し、上端部を前記内枠１１内に介挿し、かつこれらに枢支ピン２９を挿通して、内外枠５，１１を回動可能に連結している。なお、枢支ピン２９の他端はナット(図示略)で抜け止めされている。
【００１５】
図中、３０は前記支柱２８内にビス３１，３２を介して取り付けたコ字形断面の補強片、３３は支持ブロック２７の下端部に設けたビス孔で、該孔３３に挿入したビス３４を前記補強片３０にねじ込んでいる。
【００１６】
３５は支柱２８の上端部に取り付けたキャップ、３６は内枠１１と支持ブロック２７との間に介挿したロータリーダンパで、そのロータ側の角孔に支持ブロック２７に突設した角軸２７ａを嵌合し、本体ケース側の取付フランジをビス３７を介して片側の屈曲片５ａ，１１ａに取り付け、本体ケース側を天板１と同動可能にして、封入したオイルによる制動力を天板１に作用可能にしている。
【００１７】
前記支持ブロック２７の上端部は略円板状に形成され、その周面に互いに異径かつ同心円弧状の滑動部３８，３９が形成されている。このうち、大径の滑動部３８に後述のロックピンが滑動可能に配置され、該滑動部３８と小径側の滑動部３９との境界部の段部４０に、前記ロックピンを係合可能にしている。
【００１８】
また、前記段部４０と反対側の滑動部３９は平坦面に形成され、該平坦部に前記凸部２６を強力に係合かつ圧接可能にし、該凸部２６の弾性によって平坦部との緊密性を向上し、天板１の安定化を図っている。
【００１９】
天板１の下面の中央部にブラケット４１が取り付けられ、該ブラケット４１に連結軸４２が回動自在に支持され、該軸４２にレバーハンドル４３の一端が溶接等で固定され、この他端に把持部４４が取り付けられている。
前記連結軸４２の両端部は、通孔２１，２３を介して内外枠５，１１に回動自在に支持され、該内枠１１内の連結軸４２にロックリンク４５がビス止めされている。
【００２０】
前記ロックリンク４５と補強ビード２５の斜状の延設部２５ａに、捩りバネ４６の両端部が掛け止められ、該バネ４６の弾性を介してロックリンク４５を支持ブロック２７側に回動可能に付勢し、該リンク４５の先端に突設したロックピン４７を前記段部４０に係合可能にしている。
【００２１】
この他、図中４８，４８は支柱２８の下端部に略ハ字形状に取り付けた脚で、その先端部にキャスター４９を回動自在に取り付けている。５０は支柱２８，２８の下端部間を連結する連結枠、５１は床面である。
【００２２】
このように構成した折畳みテーブルは、従来のこの種のテーブルに比べて補強枠２と内枠１１を要するが、補強枠２はロールフォーミングによって管材を成形し、内枠１１は樹脂成形して製作するから、加工が容易で均一な品質が得られる特に内枠１１は、樹脂成形によって従来のプレス成形に比べ成形誤差が少なく、高精度かつ均一な品質が得られる。
また、内外枠５，１１は、屈曲片５ａ，１１ａの互いに対称位置に軸孔２１，２３を形成し、またピン孔９，１０の左右および対称位置にビス孔１０，５２を形成して、それらの左右共用化を図っている。
【００２３】
次に本発明の折畳みテーブルを組み立てる場合は、先ず天板１の裏面の所定位置に一対の補強枠２を配置し、その凹溝３側からビス４を天板１中の埋込ナットにねじ込んで取り付ける。この場合、ビス４の頭部４ａは凹溝３に隠蔽され、その表出による体裁の低下が改善される。
【００２４】
一方、前記補強枠２の取り付けと前後して、内外枠５，１１に支持ブロック２７とロックリンク４５を組み付ける。この組み付けは、先ず外枠５の内側に内枠１１を嵌合し、該内枠１１の内側に支持ブロック２７とロータリーダンパ３６とを挿入し、かつその際ロータリーダンパ３６の角孔に角軸２７ａを嵌合する。
【００２５】
そして、これらに外枠５の外側から枢支ピン２９を差し込み、該ピン２９の外端部の螺軸にナット(図示略)をねじ込んで、これらを一体かつ回動可能に連結するとともに、外枠５の外側からビス３７を前記ロータリーダンパ３６の一方の取付フランジにねじ込み、該ダンパ３６を取り付ける。
【００２６】
また、レバーハンドル４３と一体のブラケット４１に連結軸４２を挿入し、該軸４２の端部を前記組み付け後の内外枠５，１１に差し込み、かつその際連結軸４２の端部にロックリンク４５を差し込み、これを所定位置でビス止めするとともに、捩りバネ４６を巻き掛ける。
【００２７】
こうして、支持ブロック２７とロックリンク４５を組み付けた内外枠５，１１を保持し、その切欠孔６，２０に前記補強枠２を差し込み、該枠２の端部を屈曲片１１ａの内面に近接配置したところで、凹孔１５〜１８の外側からビス８を挿入し、これを外枠５のビス孔７を介して天板１中の埋込ナット(図示略)にねじ込み、内外枠５，１１を天板１の下面に取り付け、更に前記ブラケット４１を天板１の下面に固定する。この状況は図２，３のようである。
【００２８】
そして、支持ブラケット２７のビス孔３３にビス３４を挿入し、これを支柱２８の内部に取り付けた補強片３０にねじ込み、支持ブラケット２７と支柱２８とを連結する。この後、支柱２８，２８の下端部間を連結枠５０で連結し、また支柱２８の下端部に一対の脚４８を取り付ければ、一連の組み立て作業が終了する
【００２９】
こうして組み立てた折り畳みテーブルは図示のようで、該テーブルの不使用時は図９のように天板１が垂直に折り畳まれ、補強ビード２５の基端部が段部４０に係合し、またロックリンク４５の先端部が捩りバネ４６の弾性に抗して滑動部３８に係合し、該滑動部３８を圧接して、前記折り畳み状況を維持している。
【００３０】
このようなテーブルの不使用時には、内外枠５，１１が表出するが、外枠５の内部の大半は内枠１１のフレームカバー１２，１３で隠蔽されているから、略コ字形断面に屈曲しただけ従来の下枠に比べて体裁が良く、また下枠の開口縁に擦過した際の怪我を未然に防止する。
【００３１】
このような状態からテーブルを使用する場合は、天板１の上端部を保持し、これを図９の矢視のように支柱２８側へ引き下げる。
このようにすると、天板１が前記ロックリンク４５の圧接力に抗し、その自重によって枢支ピン２９を中心に回動し、これが略９０°回動したところで、ロックピン４７が段部４０に係合し、また補強ビード２５の凸部２６が滑動部３９の終端部に係合して、天板１を水平に保持する。この状況は図４，８のようで、この後テーブルが使用される。
【００３２】
このようなテーブルの使用時は、前記凸部２６が天板１の自重によって滑動部３９に圧接され、その弾性によって両者が緊密に係合し、隣接部品の加工および組み付け誤差によるクリアランスやガタの発生を防止し、天板１を安定して支持する。
また、天板１は裏面を複数の補強枠２で補強され、かつその両端部を内外枠５，１１に係合して支持されるから、単に補強枠２を取り付けたものに比べて、天板の支持強度が増強され、大形テーブルに好適になる。
【００３３】
次にテーブル使用後、天板１を折り畳む場合は、レバーハンドル４３の把持部４４を保持し、これを図４の矢視方向へ押し下げ、レバーハンドル４３を固定した連結軸４２を前記ハンドル４３と同方向へ回動する。
このようにすると、連結軸４２に固定したロックリンク４５が、捩りバネ４６の弾性に抗して連結軸４２と同動し、ロックピン４７が段部４０から避退して、それらの係合を解除する。
【００３４】
このため、天板１は重量バランスを失ない、枢支ピン２９を支点に上向き回動を促される。そこで、天板１の一端部を保持し、これを図４の矢視方向へ回動し、これを略９０°回動したところで、前記延設部２５ａの基端が段部４０に係合し、ロックピン４７が滑動部３８の周面に係合して、天板１の折り畳み状況を維持する。
【００３５】
このような天板１の折り畳み時には、天板１に同動する内外枠５，１１を介して、ロータリーダンパ３６に制動力が形成され、該制動力が天板１の作動を規制可能になる。
例えば、天板１の折り畳み時、誤って天板１から手を離し、天板１が自重によって下方へ転倒回動しても、前記制動力によって天板１がゆっくり回動するから、天板１の転倒を回避することができ、天板１と滑動部３８，３９との間に手指を挟まれる事態を防止する。
また、仮に天板１が転倒しても、ロックピン４７と段部４０の係合、および凸部２６と滑動部３９との係合がゆっくり行なわれるから、それらが損傷することはない。
【００３６】
また、本発明では金属製の外枠５の内側に合成樹脂製の内枠１１を一体的に組み付け、それらの相対動を阻止するとともに、支持ブロック２７やロータリーダンパ３６の外側に内枠１１を配置しているから、天板１の折り畳み操作を円滑かつ静粛に行なえ、また天板１の支持強度を外枠５に負わせることができる。
【００３７】
なお、上述の実施形態では内外枠５，１１を支柱２８と別設の支持ブラケット２７に回動可能に連結しているが、この例に限らず支持ブラケット２７を省略し、内外枠５，１１を支柱２８の上端部に回動可能に連結してもよく、そのようにすることで部品点数が低減し、構成が簡単になる。
【００３８】
【発明の効果】
以上のように請求項１の発明は、下枠を内外枠の二重構造に構成し、これら内外枠を天板に一体的に取り付け、前記内枠の一部を有底構造に形成し、前記有底部を介し前記外枠の内部を隠蔽可能にしたから、内外枠を合理的かつ体裁良く取り付けられ、しかも天板の支持強度を強化し、大形の折畳みテーブルに好適にするとともに、天板を円滑かつ安全に折り畳め、例えば折り畳み時の体裁を改善することができる。
【００３９】
請求項２の発明は、内枠および有底部を一体成形したから、内枠を均質かつ容易に製作することができる。したがって、例えば内枠を合成樹脂製とすれば、前記の効果を容易に得られ、また天板の折り畳み操作を円滑に行なうことができる請求項３の発明は、天板の裏面に補強枠を取り付け、該補強枠の端部を前記内外枠内に係合可能に配置したから、天板の支持強度を強化でき、大形の折畳みテーブルに好適な効果がある。
請求項４の発明は、前記内枠を合成樹脂製とし、該内枠に前記支柱部材または支柱の上端部に係合可能な凸部を設けたから、凸部と支柱部材または支柱の上端部との係合時、凸部の弾性によって緊密な係合を促し、隣接部材の多少の誤差を許容して、天板の安定性を向上することができる。
【図面の簡単な説明】
【図１】本発明の実施形態を示す部分断面図で、折畳みテーブルの略半分を示している
【図２】本発明の要部を拡大して示す横断面図である。
【図３】図２のＡ−Ａ線に沿う拡大断面図である。
【図４】本発明の折畳みテーブルの使用状態を示す断面図で、天板のセット状態を示している。
【図５】図１の要部を拡大して示す断面図で、内外枠と支持ブロックと支柱との組み立て状況を示している。
【図６】本発明に適用した内外枠を分解して示す斜視図である。
【図７】本発明に適用した内外枠の組み付け状況を示す平面図である。
【図８】図４の要部を拡大して示す断面図で、折畳みテーブル使用時の内外枠と支持ブロックとロックリンクの関係を示している。
【図９】本発明の折畳みテーブルの使用状態を示す断面図で、天板の折り畳み状態を示している。
【符号の説明】
１天板
５下枠（外枠）
１１下枠（内枠）
１２，１３有底部（フレームカバー）
１５，１６係合溝
２６凸部
２７支柱部材（支持ブロック）
２８支柱[0001]
BACKGROUND OF THE INVENTION
The present invention can be manufactured reasonably and in a good manner, and further, the support strength of the top plate is enhanced to make it suitable for a large folding table, and the top plate can be folded smoothly and safely, for example, to improve the appearance at the time of folding. It relates to a folding table.
[0002]
[Prior art]
Conventionally, a table with a foldable top plate can be rotated with a lower frame fixed to the lower surface of the top plate by attaching a connecting bracket to the upper end of the column as disclosed in, for example, Japanese Patent Application Laid-Open No. 11-318571. It was configured to be connected to.
[0003]
However, this conventional table has a large forming error due to press forming of the steel plate and manufacturing the connecting bracket and the lower frame, and because these are assembled in contact with each other, abnormal noise is generated or the folding operation is performed. There was a problem that lacked smoothness.
In addition, the inside of the lower frame is exposed when the top plate is folded, and the appearance when storing the table is poor, and the top plate is supported by a pair of lower frames. There were problems such as not being able to handle the table.
[0004]
[Problems to be solved by the invention]
The present invention solves such problems and provides a folding table that is suitable for, for example, a large folding table, enhances the support strength of the top plate, and smoothly folds the top plate to improve its appearance. The purpose is to do.
[0005]
[Means for Solving the Problems]
For this reason, the invention according to claim 1 is a folding table in which a lower frame is attached to the back surface of the top plate and the lower frame is rotatably connected to a column member or an upper end of the column. Constructed in a heavy structure, these inner and outer frames are integrally attached to the top plate, a part of the inner frame is formed in a bottomed structure, and the inside of the outer frame can be concealed via the bottomed portion, The top plate can be mounted reasonably and in good shape, and the top plate can be supported with a large size, making it suitable for large folding tables.Furthermore, the top plate can be folded smoothly and safely, for example, to improve the appearance when folded. ing.
[0006]
According to a second aspect of the present invention, the inner frame and the bottomed portion are integrally formed so that the inner frame can be manufactured uniformly and easily. Therefore, for example, if the inner frame is made of a synthetic resin, the above-described effects can be easily obtained, and the top plate can be folded smoothly.
According to a third aspect of the present invention, a reinforcing frame is attached to the back surface of the top plate, the end portions of the reinforcing frame are disposed so as to be engageable with the inner and outer frames, the support strength of the top plate is enhanced, and a large folding table. It is suitable for.
According to a fourth aspect of the present invention, the inner frame is made of synthetic resin, and a convex portion that can be engaged with the upper end portion of the column member or the column is provided on the inner frame. At the time of engagement, close elasticity is promoted by the elasticity of the convex portion, and the top plate is stabilized by allowing some errors of adjacent members.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a large conference table will be described below. In FIGS. 1 to 9, reference numeral 1 denotes a substantially elliptical top plate, and a pair of reinforcing frames 2 are provided on the lower surface thereof on the long axis side. Are attached in parallel.
The reinforcing frame 2 is formed of a steel pipe having a substantially rectangular cross section, and a concave groove 3 is formed in the center of the lower surface thereof as shown in FIG. 3, and the head 4a of the mounting screw 4 is concealed and accommodated in the concave groove 3. Yes.
[0008]
Outer frames 5 constituting a lower frame are disposed at both ends of the reinforcing frame 2 so as to be orthogonal to the reinforcing frame 2, and end portions of the reinforcing frame 2 are inserted into the outer frame 5.
The outer frame 5 is formed by bending a steel plate into a substantially U-shaped cross section as shown in FIGS. 5 and 6, and the outer frame 5 is flat at both ends of the bent piece 5 a, in the embodiment, the inner bent piece 5 a. A cutout hole 6 corresponding to the width of the reinforcing frame 2 is formed across the portion, so that the reinforcing frame 2 can be inserted from the side.
[0009]
In the figure, reference numeral 7 denotes a plurality of screw holes formed in the outer frame 5, and a screw 8 can be inserted from the inner frame side described later. Reference numeral 9 denotes a pin hole formed in the central portion of the bent piece 5a. A pivot pin can be inserted.
A screw hole 10 and a shaft hole 21 for attaching a rotary damper, which will be described later, are formed on both sides of the pin hole 9, and a screw and a connecting shaft which will be described later can be inserted into each of these.
[0010]
An inner frame 11 constituting a lower frame is attached to the inner side of the outer frame 5, and the inner frame 11 is resin-molded in substantially the same shape as the outer frame 5 as shown in FIG. 6, and bent pieces 11a and 11a on both sides thereof are formed. The bent pieces 5a and 5a are disposed close to the inner surface.
The lower portion of the inner frame 11 is closed by frame covers 12 and 13 which are bottomed except for the substantially central portion, and a notch portion 14 is formed between the covers 12 and 13.
[0011]
The frame covers 12 and 13 are integrally formed with the bent pieces 11a and 11a, which are formed in a different shape from each other, and a plurality of concave holes 15 to 18 are formed in the length direction thereof.
The concave holes 15 to 18 are formed corresponding to the positions of the screw holes 7, and screw holes 19 into which the screws 8 can be inserted are formed at the bottoms. The bottoms of the concave holes 15 to 18 are formed as flat surfaces, and these flat surfaces are formed on the same surface, and the back surfaces thereof are arranged to be engageable with the inner surface of the outer frame 5.
[0012]
A cutout hole 20 is formed at a position corresponding to the cutout hole 6 of the one bent piece 11a, in the embodiment, the inner bent piece 11a, and the end of the reinforcing frame 2 inserted into the inner frame 11 is used as the other bent piece. It is arranged close to the inner surface of 11a.
In the figure, 22 is a pin hole formed in the central part of the bent pieces 11a, 11a, and a later-described pivot pin can be inserted, and 23 is an axial hole that allows a later-described connecting shaft to be inserted.
A screw hole 52 for attaching the rotary damper is formed at a symmetrical position of the pin hole 22.
[0013]
The inner frame 11 is reinforced through the reinforcing ribs 24 and 25, and the reinforcing rib 25 that connects the central portions of the bent pieces 11 a and 11 a protrudes the lower end portion downward, and the convex portion 26 is used as the top plate 1. Sometimes, it is engaged with a support block 27 which is a support member, and the top plate 1 is stabilized through its elasticity.
[0014]
The support block 27 is formed into a substantially wall clock shape by aluminum die casting, and a lower end portion thereof is fixed to an upper portion of the column 28, an upper end portion is inserted into the inner frame 11, and a pivot pin 29 is inserted therethrough. Thus, the inner and outer frames 5 and 11 are rotatably connected. Note that the other end of the pivot pin 29 is secured by a nut (not shown).
[0015]
In the figure, 30 is a U-shaped cross-section reinforcing piece attached to the support 28 via screws 31 and 32, 33 is a screw hole provided at the lower end of the support block 27, and a screw 34 inserted into the hole 33 is provided. Screwed into the reinforcing piece 30.
[0016]
Reference numeral 35 denotes a cap attached to the upper end of the column 28, and 36 denotes a rotary damper interposed between the inner frame 11 and the support block 27. A square shaft 27a protruding from the support block 27 is provided in a square hole on the rotor side. The main body case side mounting flange is attached to the bent pieces 5a, 11a on one side via screws 37, the main body case side is movable with the top plate 1, and the braking force by the enclosed oil is applied to the top plate 1. It is possible to act on.
[0017]
The upper end portion of the support block 27 is formed in a substantially disc shape, and sliding portions 38 and 39 having different diameters and concentric arcs are formed on the peripheral surface thereof. Among these, a lock pin (described later) is slidably disposed on the large-diameter sliding portion 38, and the lock pin can be engaged with a step portion 40 at the boundary between the sliding portion 38 and the small-diameter sliding portion 39. ing.
[0018]
Further, the sliding portion 39 opposite to the step portion 40 is formed on a flat surface so that the convex portion 26 can be strongly engaged and pressed against the flat portion, and the elasticity of the convex portion 26 allows tight contact with the flat portion. The stability is improved and the top plate 1 is stabilized.
[0019]
A bracket 41 is attached to the center of the lower surface of the top plate 1, and a connecting shaft 42 is rotatably supported by the bracket 41. One end of a lever handle 43 is fixed to the shaft 42 by welding or the like, and the other end is fixed to the other end. A grip 44 is attached.
Both ends of the connecting shaft 42 are rotatably supported by the inner and outer frames 5 and 11 through the through holes 21 and 23, and a lock link 45 is screwed to the connecting shaft 42 in the inner frame 11.
[0020]
Both ends of a torsion spring 46 are hooked on the obliquely extending portion 25a of the lock link 45 and the reinforcing bead 25 so that the lock link 45 can be rotated to the support block 27 side through the elasticity of the spring 46. The lock pin 47 urged and protruded from the tip of the link 45 is made engageable with the stepped portion 40.
[0021]
In addition, 48 and 48 are legs attached to the lower end part of the support | pillar 28 in the substantially C shape, and the caster 49 is rotatably attached to the front-end | tip part. Reference numeral 50 denotes a connecting frame that connects the lower ends of the columns 28 and 28, and 51 denotes a floor surface.
[0022]
The folding table constructed as described above requires a reinforcing frame 2 and an inner frame 11 as compared with a conventional table of this type. The reinforcing frame 2 is formed by forming a tube material by roll forming and the inner frame 11 is formed by resin molding. Therefore, the inner frame 11 that can be easily processed and can obtain uniform quality can be obtained with high accuracy and uniform quality with less molding error than conventional press molding by resin molding.
The inner and outer frames 5, 11 are formed with axial holes 21, 23 at symmetrical positions of the bent pieces 5a, 11a, and screw holes 10, 52 are formed at the left and right and symmetrical positions of the pin holes 9, 10. The left and right are shared.
[0023]
Next, when assembling the folding table of the present invention, first, a pair of reinforcing frames 2 are arranged at predetermined positions on the back surface of the top plate 1, and screws 4 are screwed into embedded nuts in the top plate 1 from the concave groove 3 side. Attach with. In this case, the head portion 4a of the screw 4 is concealed in the concave groove 3, and the appearance deterioration due to its appearance is improved.
[0024]
On the other hand, the support block 27 and the lock link 45 are assembled to the inner and outer frames 5 and 11 before and after the reinforcement frame 2 is attached. In this assembly, first, the inner frame 11 is fitted inside the outer frame 5, the support block 27 and the rotary damper 36 are inserted inside the inner frame 11, and the angular axis is inserted into the square hole of the rotary damper 36 at that time. 27a is fitted.
[0025]
Then, pivot pins 29 are inserted into these from the outside of the outer frame 5, nuts (not shown) are screwed into the screw shafts of the outer ends of the pins 29, and these are integrally and pivotally connected. Screws 37 are screwed into one mounting flange of the rotary damper 36 from the outside of the frame 5 to attach the damper 36.
[0026]
Further, the connecting shaft 42 is inserted into the bracket 41 integral with the lever handle 43, and the end portion of the shaft 42 is inserted into the assembled inner and outer frames 5, 11, and the lock link 45 is inserted into the end portion of the connecting shaft 42 at that time. Is inserted and screwed in place, and a torsion spring 46 is wound around.
[0027]
Thus, the inner and outer frames 5 and 11 assembled with the support block 27 and the lock link 45 are held, the reinforcing frame 2 is inserted into the cutout holes 6 and 20, and the end of the frame 2 is disposed close to the inner surface of the bent piece 11a. Then, the screws 8 are inserted from the outside of the concave holes 15 to 18 and screwed into the embedded nuts (not shown) in the top plate 1 through the screw holes 7 of the outer frame 5 so that the inner and outer frames 5 and 11 are attached. It is attached to the lower surface of the top plate 1, and the bracket 41 is fixed to the lower surface of the top plate 1. This situation is as shown in FIGS.
[0028]
Then, a screw 34 is inserted into the screw hole 33 of the support bracket 27 and screwed into a reinforcing piece 30 attached to the inside of the support 28 to connect the support bracket 27 and the support 28. Thereafter, the lower end portions of the support columns 28 and 28 are connected by the connecting frame 50, and the pair of legs 48 are attached to the lower end portions of the support columns 28. Thus, a series of assembly operations is completed.
The folding table assembled in this way is shown in the figure. When the table is not used, the top plate 1 is folded vertically as shown in FIG. 9, the base end of the reinforcing bead 25 is engaged with the step 40, and the lock is locked. The distal end portion of the link 45 engages with the sliding portion 38 against the elasticity of the torsion spring 46 and presses the sliding portion 38 to maintain the folded state.
[0030]
When such a table is not used, the inner and outer frames 5 and 11 are exposed. However, since most of the inside of the outer frame 5 is concealed by the frame covers 12 and 13 of the inner frame 11, it is bent into a substantially U-shaped cross section. As a result, the appearance is better than that of the conventional lower frame, and injuries caused by rubbing against the opening edge of the lower frame are prevented.
[0031]
When the table is used from such a state, the upper end portion of the top plate 1 is held, and this is pulled down toward the support column 28 as shown by an arrow in FIG.
If it does in this way, the top plate 1 resists the press-contact force of the said lock link 45, will rotate centering on the pivot pin 29 with the dead weight, and when this rotated about 90 degrees, the lock pin 47 will be the step part 40. Further, the convex portion 26 of the reinforcing bead 25 is engaged with the end portion of the sliding portion 39 to hold the top plate 1 horizontally. This situation is as shown in FIGS. 4 and 8, and a table is used thereafter.
[0032]
When such a table is used, the convex portion 26 is pressed against the sliding portion 39 by its own weight, and both of them are tightly engaged by its elasticity, and clearance and backlash caused by processing and assembling errors of adjacent parts are caused. Generation | occurrence | production is prevented and the top plate 1 is supported stably.
Moreover, since the top plate 1 is reinforced by a plurality of reinforcing frames 2 and supported by engaging both end portions with the inner and outer frames 5 and 11, the top plate 1 can be compared with a case in which the reinforcing frame 2 is simply attached. The support strength of the plate is increased, which makes it suitable for a large table.
[0033]
Next, when the top plate 1 is folded after the table is used, the holding portion 44 of the lever handle 43 is held and pushed down in the direction of the arrow in FIG. 4, and the connecting shaft 42 to which the lever handle 43 is fixed is connected to the handle 43. Rotate in the same direction.
In this way, the lock link 45 fixed to the connecting shaft 42 moves together with the connecting shaft 42 against the elasticity of the torsion spring 46, and the lock pin 47 is retracted from the stepped portion 40, and the engagement thereof. Is released.
[0034]
For this reason, the top plate 1 does not lose its weight balance and is urged to turn upward with the pivot pin 29 as a fulcrum. Therefore, one end of the top plate 1 is held and rotated in the direction of the arrow in FIG. 4, and when this is rotated approximately 90 °, the base end of the extended portion 25 a is engaged with the stepped portion 40. Then, the lock pin 47 is engaged with the peripheral surface of the sliding portion 38, and the folding state of the top plate 1 is maintained.
[0035]
When the top plate 1 is folded, a braking force is formed on the rotary damper 36 via the inner and outer frames 5 and 11 that move together with the top plate 1, and the braking force can regulate the operation of the top plate 1. .
For example, when the top plate 1 is folded, if the hand is accidentally released from the top plate 1 and the top plate 1 is rotated downward by its own weight, the top plate 1 is slowly rotated by the braking force. 1 can be avoided, and a situation in which fingers are pinched between the top board 1 and the sliding portions 38 and 39 can be prevented.
Even if the top plate 1 falls, the engagement between the lock pin 47 and the stepped portion 40 and the engagement between the convex portion 26 and the sliding portion 39 are performed slowly, so that they are not damaged.
[0036]
Further, in the present invention, the synthetic resin inner frame 11 is integrally assembled inside the metal outer frame 5 to prevent relative movement thereof, and the inner frame 11 is disposed outside the support block 27 and the rotary damper 36. Therefore, the folding operation of the top plate 1 can be performed smoothly and quietly, and the support strength of the top plate 1 can be imposed on the outer frame 5.
[0037]
In the above-described embodiment, the inner and outer frames 5 and 11 are rotatably connected to the support bracket 27 provided separately from the support column 28. However, the support bracket 27 is not limited to this example, and the inner and outer frames 5, 11 are omitted. May be connected to the upper end of the column 28 so as to be able to rotate. By doing so, the number of parts is reduced and the configuration is simplified.
[0038]
【The invention's effect】
As described above, the invention of claim 1 is configured such that the lower frame has a double structure of inner and outer frames, these inner and outer frames are integrally attached to the top plate, and a part of the inner frame is formed into a bottomed structure, Since the inside of the outer frame can be concealed via the bottomed portion, the inner and outer frames can be mounted reasonably and in good shape, and the support strength of the top plate is enhanced, making it suitable for a large folding table and A board can be folded smoothly and safely, for example, and the appearance at the time of folding can be improved.
[0039]
In the invention of claim 2, since the inner frame and the bottomed portion are integrally formed, the inner frame can be manufactured uniformly and easily. Therefore, for example, if the inner frame is made of a synthetic resin, the above effect can be easily obtained, and the folding operation of the top plate can be performed smoothly. Since the attachment and the end of the reinforcing frame are arranged so as to be engageable with each other in the inner and outer frames, the support strength of the top plate can be strengthened, which is suitable for a large folding table.
In the invention of claim 4, the inner frame is made of synthetic resin, and the inner frame is provided with a convex portion that can be engaged with the upper end portion of the column member or the column. At the time of the engagement, it is possible to promote close engagement by the elasticity of the convex portion, tolerate some errors of the adjacent members, and to improve the stability of the top plate.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing an embodiment of the present invention, showing a half of a folding table. FIG. 2 is an enlarged cross-sectional view showing a main part of the present invention.
3 is an enlarged cross-sectional view taken along line AA in FIG.
FIG. 4 is a cross-sectional view showing a usage state of the folding table of the present invention, showing a set state of the top board.
FIG. 5 is an enlarged cross-sectional view showing the main part of FIG. 1, showing the assembled state of the inner and outer frames, the support block, and the columns.
FIG. 6 is an exploded perspective view showing an inner and outer frame applied to the present invention.
FIG. 7 is a plan view showing an assembled state of the inner and outer frames applied to the present invention.
8 is an enlarged cross-sectional view showing the main part of FIG. 4, and shows the relationship among the inner and outer frames, the support block, and the lock link when the folding table is used.
FIG. 9 is a cross-sectional view showing the usage state of the folding table of the present invention, showing the folding state of the top board.
[Explanation of symbols]
1 Top plate 5 Lower frame (outer frame)
11 Lower frame (inner frame)
12,13 Bottomed part (frame cover)
15, 16 Engaging groove 26 Protruding portion 27 Prop member (support block)
28 props

Claims

In a folding table in which a lower frame is attached to the back surface of the top plate and the lower frame is pivotally connected to a column member or an upper end of the column, the lower frame is configured in a double structure of inner and outer frames, and these inner and outer frames are A folding table that is integrally attached to a top plate, part of the inner frame is formed in a bottomed structure, and the inside of the outer frame can be concealed through the bottomed portion.

The folding table according to claim 1, wherein the inner frame and the bottomed portion are integrally formed.

The folding table according to claim 1, wherein a reinforcing frame is attached to the back surface of the top plate, and an end portion of the reinforcing frame is arranged to be engageable with the inner and outer frames.

The folding table according to claim 2, wherein the inner frame is made of synthetic resin, and the inner frame is provided with a protrusion that can be engaged with the upper end portion of the column member or the column.