JP2004222942A

JP2004222942A - Length adjustable leg, and table equipped with the same

Info

Publication number: JP2004222942A
Application number: JP2003013921A
Authority: JP
Inventors: Kazuhisa Akiba; 一久秋葉; Kenji Nakamura; 健治中村
Original assignee: Okamura Corp
Current assignee: Okamura Corp
Priority date: 2003-01-22
Filing date: 2003-01-22
Publication date: 2004-08-12
Anticipated expiration: 2023-01-22
Also published as: JP4246505B2

Abstract

<P>PROBLEM TO BE SOLVED: To easily adjust the length of a leg without using bolts or the like. <P>SOLUTION: A plurality of engaging holes 28 are provided in the vertical direction at specified intervals in a confronted state on the outer peripheral surface of an internal leg rod 27. At the same time, on both side surfaces of the outer peripheral surface of the internal leg rod 27, a pair of approximately semi-cylindrical stopper pieces 29a equipped with protrusions 32 which can selectively be engaged with a plurality of the engaging holes 28 on the inside surface, and having a flange 31 with an enlarged diameter on the lower end are fitted by making the protrusions 32 engage with desired engaging holes 28. Then, both of the semi-cylindrical stopper pieces 29a are fitted into an external leg rod 25 together with the internal leg rod 27 in a manner to be insertable/removable from the lower side. Thus, the enlarged diameter flanges 31 of both of the semi-cylindrical stopper pieces 29a are made to abut on the opening edge at the lower end of the external leg rod 25. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、長さ調節可能な脚及びそれを備えるテーブル（机も含む）に関する。
【０００２】
【従来の技術】
例えばオフィスのワークステーションに設置されるテーブルにおいては、作業内容や他のワークステーション構成要素との連係作業を円滑に行うために、脚の長さを調節可能として、テーブルの天板の高さを変更しうるようにすることが好ましい。
【０００３】
従来の長さ調節可能な脚（脚柱）としては、周壁上部に長孔を有する下支柱と、この下支柱に上下にスライド自在に挿入され、かつ周壁に上下方向を向くガイドスロットと複数のロック孔を有する上支柱と、下支柱内においてその上端縁と長孔の下端縁に係止される、ナットが固着されたボルト止め金具と、該ボルト止め金具のナットにボルトを螺合することにより、下支柱の外面に固定され、かつ上端に、上記上支柱のロック孔に選択的に係合可能なロック片を有するロック金具とを備えたものや（例えば特許文献１参照）、上記ボルト止め金具を別体とし、さらに、下支柱内においてその上端縁と長孔の下端縁に係止される支持金具を追加したものもある（例えば特許文献２参照）。
【０００４】
【特許文献１】
特開平１０−３１３９５１号公報
【特許文献２】
特開２００２−１７４５４号公報
【０００５】
【発明が解決しようとする課題】
上述した特許文献に記載されている従来の脚の長さ調節構造では、いずれも、ボルトを用いてロック金具を下支柱の外周面に固定しているため、ボルトの頭部やロック金具が外部に露出して見栄えが悪いだけでなく、長さ調節の都度、工具を用いてボルトを着脱する必要があるため、脚の長さの調節が面倒である。
また、部品点数や上下の支柱への加工工数が多いため、コスト高となる問題もある。
【０００６】
また、上述のような長さ調節可能な脚を備える机やテーブルを、ワークステーションに用いる際には、単に所望のレイアウトに自立させてワークステーションの側方に配置されるのが一般的であるため、テーブルが簡単に移動して、レイアウトが崩れる恐れがあるとともに、接床している一部の脚が作業の妨げとなることがある。
【０００７】
本発明は、上記問題点に鑑みてされたもので、ボルトやロック金具等を用いることなく、長さを簡単に調節しうるとともに、見栄えを向上させることができ、かつ部品点数や加工工数を最小限としてコスト低減が可能となり、しかも、ワークステーション等の支持体にも、安定かつ高さ変更可能に付設しうるようにした、長さ調節可能な脚及びそれを備えるテーブルを提供することを目的としている。
【０００８】
【課題を解決するための手段】
本発明の脚によると、上記課題は、次のようにして解決される。
（１）上下方向を向く筒状の外脚杆と、この外脚杆に上下移動自在に嵌合される筒状の内脚杆とを備える脚において、前記内脚杆の外周面に、複数の係合孔を、上下方向に所要の間隔をもってかつ対向状に穿設するとともに、前記内脚杆の外周面の両側面に、前記複数の係合孔に選択的に係合しうる突部を内面に備え、かつ下端に拡径フランジを有する１対のほぼ半円筒状ストッパ片を、それらの突部を所望の係合孔に係合させて外嵌し、該両半円筒状ストッパ片を、内脚杆と共に、前記外脚杆に下方より挿脱可能に嵌合することにより、両半円筒状ストッパ片の前記拡径フランジを、外脚杆の下端の開口縁に当接させる。
【０００９】
（２）上記（１）項において、内脚杆の上端部外周面に、外周面が外脚杆の内周面に摺接する筒状スライダを、上下方向に移動不能に嵌合する。
【００１０】
（３）上記（２）項において、筒状スライダが、１対の半円筒状スライダ片の対向面を互いに突合わせて形成され、かつそれらの内面に設けた突部を、内脚杆の上端部外周面に穿設した１対の係合孔に係合させることにより、上下方向への移動を防止するようにする。
本発明のテーブルによると、上記課題は、次のようにして解決される。
【００１１】
（４）天板の前部下面に、上記（１）〜（３）項のいずれかの脚の上端を固着して、その下端を接床させ、天板の前部を支持するとともに、前記天板の後部側の下面に、高さ調節可能な係止手段を有する下向きの支杆を設け、この支杆を、床上に設けたワークステーションにおける横長の支持ユニットの上部に形成された嵌合孔に嵌合するとともに、前記係止手段を、支持ユニットの上面に当接させることにより、天板の後部を前記支持ユニットに支持させる。
【００１２】
【発明の実施の形態】
以下、本発明の実施形態を、図面に基づいて説明する。
図１は、本発明の長さ調節可能な脚を備える２台のテーブル（１）（１）を、ワークステーションの構成要素取付用の支持ユニット（２）に架設した実施形態を示す。
【００１３】
支持ユニット（２）は、図２及び図３にも示すように、左右１対の支持脚（３）（３）と、それらの上部の対向面に固着された側面視ほぼＹ字状をなす左右１対の側枠（４）と、その上端の前後部に（以下、テーブルを架設した側を前として説明する）左右両端が固着された前後１対のサイドビーム（５）（５）と、両サイドビーム（５）の対向面に前後の起立片（６ａ）が固着された左右方向に長い水平の受支板（６）とを備えている。
【００１４】
（７）は、上記両側枠（４）の対向面の下部中央に固着されたセンタビーム（８）に上端部が係止された前後１対（後側のものは図示略）のサイドカバー、（９）（９）は、両支持脚（３）の外側面に止着されたエンドカバーである。
【００１５】
上記受支板（６）の中央部と前後部とには、ワークステーション構成要素を支持するための多数の嵌合孔（１０）が、左右方向に３列として、かつ中央列のものより前後部列のものの方の間隔を小として、等間隔おきに並べて穿設されている。
【００１６】
各嵌合孔（１０）は、図４にその１個のみを拡大して示すように、円形孔の左右の開口縁に、平面視方形をなす凹入溝（１０ａ）を対向状に設けた形状としてある。
【００１７】
図２に示すように、各テーブル（１）における天板（１１）の後端部下面の左右両側部は、受支板（６）の前列の嵌合孔（１０）に嵌合される左右１対のパイプ状支杆（１２）の上端に固着された前方を向く支持杆（１３）に固定され、また同じく天板（１１）の前端部下面の左右両側部は、接床する本発明の左右１対のパイプ状脚（１４）（詳細は後述する）の上端の方形をなす取付板（１５）に固定されている。
【００１８】
嵌合孔（１０）に嵌合される支杆（１２）は、脚（１４）よりも短寸とされ、その上半部の左右の外周面には、上下方向に長い長円形の複数の係合孔（１６）が、上下方向に対向状に穿設されている。
【００１９】
前記各支杆（１２）は、次のようにして、支持ユニット（２）の嵌合孔（１０）に支持されている。
【００２０】
図２及び図３に示すように、支杆（１２）の上端部外周面に、係止手段である、上端に拡径フランジ（１７）を有する左右１対の半円筒状スリーブ（１８ａ）（１８ａ）よりなる係止スリーブ（１８）を、両スリーブ片（１８ａ）の内面に突設した上下２個の突部（１９）（１９）を支杆（１２）の所望の係合孔（１６）に選択的に係合させて外嵌する。
【００２１】
ついで、係止スリーブ（１８）を、前列の所望の嵌合孔（１０）に嵌合されたガイドスリーブ（２０）に嵌合することにより、支杆（１２）は受支板（６）上に起立状態で支持される。
【００２２】
係止スリーブ（１８）の拡径フランジ（１７）は、その外周部を上端において下向きに折り返すことにより、下面の内側に上向きの環状溝（２１）が形成され、この環状溝（２１）に、ガイドスリーブ（２０）の上端に形成した上向きの環状突条（２２）を嵌合することにより、両スリーブ片（１８ａ）の相互の位置ずれやがた付きが防止されるようになっている。
【００２３】
ガイドスリーブ（２０）は、その下部に設けた縮径段部（２０ａ）を嵌合孔（１０）に嵌合することにより、下方への移動が阻止されている。
【００２４】
図４に示すように、ガイドスリーブ（２０）における縮径段部（２０ａ）の左右の外周面には、受支板（６）の嵌合孔（１０）の凹入溝（１０ａ）を挿通可能な水平板状の突片（２３）が形成され、それと対向するガイドスリーブ（２０）の拡径下面には、突片（２３）とほぼ補形をなす凹部（２４）が形成されている。
【００２５】
突片（２３）の上面の両側部には、下向きの傾斜面（２３ａ）（２３ａ）が形成されている。
【００２６】
ガイドスリーブ（２０）の拡径下面と突片（２３）の上面との隙間は、受支板（６）の板厚とほぼ等寸又はそれよりも若干小としてある。
【００２７】
上記両突片（２３）を嵌合孔（１０）の凹入溝（１０ａ）に挿通させるようにして、ガイドスリーブ（２０）の縮径段部（２０ａ）を嵌合孔（１０）に嵌合したのち、ガイドスリーブ（２０）をほぼ９０°回転させることにより、該ガイドスリーブ（２０）は嵌合孔（１０）から外れ止めされ、それに嵌合された係止スリーブ（１８）及び支杆（１２）と共に、受支板（６）上に強固に支持される（図３参照）。
【００２８】
テーブル（１）の前部側の左右の脚（１４）（１４）は、図５に示すように、下端が開口され、かつ上端に天板（１１）の下面に固定される取付板（１５）が固着された金属パイプ状の外脚杆（２５）と、この外脚杆（２５）内に、その内周面間に所要の隙間が形成されるように上下に移動自在に嵌合され、かつ下端に接床するアジャスタ（２６）が取付けられた金属パイプ状の内脚杆（２７）とを備え、内脚杆（２７）のやや上方寄りの中間部の左右両側面には、上下方向に長い長円形をなす複数の係合孔（２８）が、左右対向状に所定間隔おきに穿設されている。この係合孔（２８）のピッチは、上記支杆（１２）の係合孔（１６）のピッチとほぼ等しくしてある。
【００２９】
また、内脚杆（２７）の上端部の左右両側面にも、上記と同形状の１個の係合孔（２８）が、対向状に穿設されている。
【００３０】
内脚杆（２７）における複数の係合孔（２８）が列設された中間部と上端の外周面とには、それぞれ金属製の筒状ストッパ（２９）と、硬質合成樹脂よりなる筒状スライダ（３０）とが、外脚杆（２７）の内周面と摺接するように外嵌されている。
【００３１】
筒状ストッパ（２９）は、図６及び図７に示すように、左右１対の半円筒状ストッパ片（２９ａ）（２９ａ）の対向面を突合わせて形成され、それらの下端の外周面には、拡径フランジ（３１）が、また上端部の内面中央には、上記係合孔（２８）に選択的に係合可能な突部（３２）が、それぞれ設けてある。
【００３２】
筒状スライダ（３０）は、図８及び図９に示すように、左右１対の半円筒状スライダ片（３０ａ）（３０ａ）の互いの対向面を突合わせて形成され、それらの内面中央には、上記上端の係合孔（２８）に係合可能な突部（３３）が設けられている。
【００３３】
脚（１４）を組立てるには、まず半円筒状スライダ片（３０ａ）（３０ａ）を、その内面の突部（３３）を内脚杆（２７）の上端の係合孔（２８）に係合させた状態で、外脚杆（２５）の下端部内に、内脚杆（２７）と共に下方より嵌合する。
【００３４】
ついで、両半円筒ストッパ片（２９ａ）の突部（３２）を、内脚杆（２７）中間部の所望の係合孔（２８）に嵌合させた状態で、下端の拡径フランジ（３１）の上面が外脚杆（２５）の開口下端と当接するまで、内脚杆（２７）と共に外脚杆（２５）内に嵌合する。
【００３５】
これにより、外脚杆（２５）と内脚杆（２７）とは、互いに接近する方向への相対移動が阻止されるので、脚（１４）は所望の長さに保持される。
【００３６】
突部（３２）を嵌合する係合孔（２８）を選択することにより、脚（１４）の長さを段階的に調節することができ、テーブル（１）を、高さの異なる他の支持ユニット（２）にも架設することができる。
【００３７】
また、支持ユニット（２）に架設した状態で、天板（１１）の高さを変えたいときには、脚（１４）の長さと、支持ユニット（２）により支持した後部側の支杆（１２）の受支板（６）よりの突出長さとを適宜に調節すればよい。
【００３８】
本発明は、上記実施形態に限定されるものでない。
上記実施形態では、筒状スライダ（３０）を２分割構造としているが、これを、円筒形をなす一体構造とするとともに、突部（３５）を省略し、これを、内脚杆（２７）の上端部に、圧入等により上下方向に移動不能に嵌着してもよい。
【００３９】
また、外脚杆（２５）内への内脚杆（２７）の嵌合寸法が小さく、脚（１４）の長さ調節代が小さくてよい場合や、筒状ストッパ（２９）の上下寸法を大とした際には、筒状スライダ（３０）を省略することもある。
【００４０】
本発明の脚（１４）は、上記ワークステーション用のテーブル（１）の外、通常の床面に自立させて配置されるテーブルや机、その他の什器等にも適用しうることは勿論である。
【００４１】
【発明の効果】
請求項１記載の発明によれば、半円筒状ストッパ片の突部を、内脚杆の係合孔に選択的に係合させるようにして、両半円筒状ストッパ片を内脚杆の外周面に嵌合し、それらと共に内脚杆を、外脚杆に下方より嵌合するだけの簡単な操作で、脚の長さを係合孔の数だけ段階的に調節することができる。
従って、従来のようなボルトやロック金具等を用いる必要はなく、それらが外部に露出しないので見栄えが向上する。
また、部品点数や脚杆への加工工数が少ないので、コスト低減が可能となる。
【００４２】
請求項２記載の発明によれば、外脚杆内への内脚杆の嵌合寸法が大きく、脚の長さ調節代が大きい場合でも、内脚杆の上端部は、筒状スライダを介して外脚杆の内周面に摺接しているため、内脚杆がぐら付く恐れはない。
【００４３】
請求項３記載の発明によれば、筒状スライダを、内脚杆の上端部に、上下方向への移動を阻止して簡単に取付けることができる。
【００４４】
請求項４記載の発明によれば、天板の後部側の下面は、それに設けた、係止手段を有する支杆が、ワークステーションの支持ユニット上部の嵌合孔により上下位置調節可能に支持されているため、テーブルが移動してワークステーションのレイアウトが崩れる恐れはなく、かつ天板の前部下面は、長さ調節可能な脚により支持されているため、他のワークステーション構成要素等の高さに対応させて、テーブルの天板の高さを適宜に調節することができる。
また、接床しているのは、前部側の長さ調節可能な脚のみであるため、天板下に広い空間が得られ、作業等の妨げとなる恐れが小さくなる。
【図面の簡単な説明】
【図１】本発明の脚、及びそれが取付けられたテーブルを、ワークステーションの支持ユニットに付設した状態の斜視図である。
【図２】同じく、テーブルの天板の支持形態を、拡大して示す要部の斜視図である。
【図３】同じく、天板の後部側に設けた支杆と、その支持部の拡大縦断側面図である。
【図４】ガイドスリーブの側面図である。
【図５】本発明の脚の一部切欠縦断側面図である。
【図６】同じく、筒状ストッパの正面図である。
【図７】図６のＶＩＩ−ＶＩＩ線の横断平面図である。
【図８】筒状スライダの正面図である。
【図９】図８のＶＩＩＩ−ＶＩＩＩ線の横断平面図である。
【符号の説明】
（１）テーブル
（２）支持ユニット
（３）支持脚
（４）側枠
（５）サイドビーム
（６）受支板
（６ａ）起立片
（７）サイドカバー
（８）センタビーム
（９）エンドカバー
（１０）嵌合孔
（１０ａ）凹入溝
（１１）天板
（１２）支杆
（１３）支持杆
（１４）脚
（１５）取付板
（１６）係合孔
（１７）拡径フランジ
（１８）係止スリーブ（係止手段）
（１８ａ）半円筒状スリーブ
（１９）突部
（２０）ガイドスリーブ
（２０ａ）縮径段部
（２１）環状溝
（２２）環状突条
（２３）突片
（２３ａ）傾斜面
（２４）凹部
（２５）外脚杆
（２６）アジャスタ
（２７）内脚杆
（２８）係合孔
（２９）筒状ストッパ
（２９ａ）半円筒状ストッパ片
（３０）筒状スライダ
（３０ａ）半円筒状スライダ片
（３１）拡径フランジ
（３２）突部
（３３）突部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an adjustable length leg and a table (including a desk) provided with the leg.
[0002]
[Prior art]
For example, in the case of a table installed in an office workstation, the length of the legs can be adjusted in order to smoothly perform the work contents and work in cooperation with other workstation components, and the height of the table top is increased. Preferably, it can be changed.
[0003]
The conventional length-adjustable legs (posts) include a lower post having an elongated hole in the upper portion of the peripheral wall, a guide slot inserted vertically slidably into the lower post, and a vertically extending guide slot in the peripheral wall. An upper post having a lock hole, a bolted fastener to which a nut is fixed in the lower pillar, which is locked to an upper end edge and a lower end edge of the long hole, and a bolt is screwed to the nut of the bolted fastener. And a lock fitting having a lock piece fixed to the outer surface of the lower support and having an upper end capable of selectively engaging with the lock hole of the upper support (for example, see Patent Document 1), or the bolt There is a type in which a stopper is separately provided, and further, a supporting member which is locked to the upper end edge and the lower end edge of the long hole in the lower support is added (for example, see Patent Document 2).
[0004]
[Patent Document 1]
JP-A-10-313951 [Patent Document 2]
JP-A-2002-17454 [0005]
[Problems to be solved by the invention]
In each of the conventional leg length adjusting structures described in the above-mentioned patent documents, since the lock metal is fixed to the outer peripheral surface of the lower support using a bolt, the head of the bolt and the lock metal are external. In addition to the poor appearance due to the exposure of the legs, it is necessary to attach and remove the bolts with a tool each time the length is adjusted, which makes it difficult to adjust the length of the legs.
In addition, there is also a problem that the cost increases because the number of parts and the number of steps for processing the upper and lower columns are large.
[0006]
In addition, when a desk or a table having the above-described length-adjustable legs is used for a workstation, it is general that the desk or table is simply placed on a side of the workstation in a desired layout independently. For this reason, the table may easily move and the layout may be disrupted, and some legs in contact with the floor may hinder the work.
[0007]
The present invention has been made in view of the above problems, and it is possible to easily adjust the length and improve the appearance without using bolts or lock fittings, and to reduce the number of parts and processing steps. An object of the present invention is to provide a leg having an adjustable length and a table provided with the same, which can minimize costs and can be attached to a support such as a workstation in a stable and height-changeable manner. The purpose is.
[0008]
[Means for Solving the Problems]
According to the leg of the present invention, the above-mentioned problem is solved as follows.
(1) In a leg provided with a cylindrical outer leg rod pointing in the up-down direction and a cylindrical inner leg rod fitted to the outer leg rod so as to be vertically movable, a plurality of outer leg surfaces of the inner leg rod are provided. Are formed at predetermined intervals in the up-down direction and opposed to each other, and are provided on both side surfaces of the outer peripheral surface of the inner leg rod so as to be selectively engageable with the plurality of engagement holes. And a pair of substantially semi-cylindrical stopper pieces having an inner surface and having an enlarged flange at a lower end are externally fitted by engaging their projections with desired engaging holes, and the two semi-cylindrical stopper pieces are fitted. Is fitted to the outer leg rod together with the inner leg rod so as to be able to be inserted and removed from below, so that the enlarged diameter flanges of the two semi-cylindrical stopper pieces come into contact with the opening edge at the lower end of the outer leg rod.
[0009]
(2) In the above item (1), a cylindrical slider whose outer peripheral surface is in sliding contact with the inner peripheral surface of the outer leg rod is fitted to the outer peripheral surface of the upper end portion of the inner leg rod so as to be immovable in the vertical direction.
[0010]
(3) In the above item (2), the cylindrical slider is formed by abutting opposing surfaces of a pair of semi-cylindrical slider pieces with each other, and the protrusion provided on the inner surface thereof is formed by the upper end of the inner leg rod. By engaging with a pair of engagement holes formed in the outer peripheral surface of the part, the movement in the vertical direction is prevented.
According to the table of the present invention, the above problem is solved as follows.
[0011]
(4) The upper end of any of the above items (1) to (3) is fixed to the lower surface of the front portion of the top plate, and the lower end is brought into contact with the floor to support the front portion of the top plate. A downward supporting rod having a height-adjustable locking means is provided on the lower surface on the rear side of the top plate, and this supporting rod is fitted on an upper part of a horizontally long supporting unit in a workstation provided on the floor. The rear part of the top plate is supported by the support unit by fitting the engaging means into contact with the hole and contacting the upper surface of the support unit.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment in which two tables (1) and (1) having adjustable length legs of the present invention are mounted on a support unit (2) for mounting components of a workstation.
[0013]
As shown in FIGS. 2 and 3, the support unit (2) has a pair of left and right support legs (3) and (3), and has a substantially Y-shape in side view, which is fixed to opposing surfaces on the upper portions thereof. A pair of left and right side frames (4), and a pair of front and rear side beams (5) and (5) having right and left ends fixed to the front and rear portions of the upper end thereof (hereinafter, the side on which the table is erected) will be described. And a horizontal support plate (6) that is long in the left-right direction and has front and rear standing pieces (6a) fixed to opposing surfaces of both side beams (5).
[0014]
(7) a pair of front and rear (rear side not shown) side covers whose upper ends are locked to a center beam (8) fixed to the lower center of the opposing surfaces of the side frames (4); (9) (9) is an end cover fixed to the outer surface of both support legs (3).
[0015]
A large number of fitting holes (10) for supporting the workstation components are provided in the center part and the front and rear parts of the support plate (6) in three rows in the left-right direction. The gaps in the row are smaller and the holes are arranged at equal intervals.
[0016]
As shown in FIG. 4, only one of the fitting holes (10) is provided with a recessed groove (10 a) having a rectangular shape in a plan view facing the left and right opening edges of the circular hole. As a shape.
[0017]
As shown in FIG. 2, the left and right sides of the lower surface of the rear end of the top plate (11) in each table (1) are left and right fitted into the fitting holes (10) in the front row of the support plate (6). The present invention is fixed to a forward-facing support rod (13) fixed to the upper ends of a pair of pipe-shaped support rods (12), and the left and right sides of the lower surface of the front end of the top plate (11) are also in contact with the floor. Are fixed to a rectangular mounting plate (15) at the upper end of a pair of left and right pipe-shaped legs (14) (to be described in detail later).
[0018]
The support rod (12) to be fitted into the fitting hole (10) is shorter than the leg (14), and a plurality of oblong shapes that are longer in the vertical direction are provided on the left and right outer peripheral surfaces of the upper half thereof. An engagement hole (16) is formed in the vertical direction so as to face each other.
[0019]
Each of the support rods (12) is supported in the fitting hole (10) of the support unit (2) as follows.
[0020]
As shown in FIGS. 2 and 3, a pair of left and right semi-cylindrical sleeves (18 a) each having an enlarged flange (17) at the upper end, which is a locking means, is provided on the outer peripheral surface of the upper end of the support rod (12). The upper and lower projections (19) and (19), which are provided on the inner surfaces of the two sleeve pieces (18a), respectively, are engaged with the locking sleeve (18) formed by the engagement sleeve (18). ) Is selectively engaged with and externally fitted.
[0021]
Then, the locking sleeve (18) is fitted to the guide sleeve (20) fitted in the desired fitting hole (10) in the front row, so that the support rod (12) is placed on the support plate (6). It is supported in an upright state.
[0022]
The enlarged-diameter flange (17) of the locking sleeve (18) is formed by turning the outer peripheral portion downward at the upper end to form an upward annular groove (21) inside the lower surface. By fitting an upwardly extending annular ridge (22) formed at the upper end of the guide sleeve (20), mutual displacement and play of the two sleeve pieces (18a) are prevented.
[0023]
The guide sleeve (20) is prevented from moving downward by fitting a reduced diameter step (20a) provided at its lower part into the fitting hole (10).
[0024]
As shown in FIG. 4, the recessed groove (10a) of the fitting hole (10) of the receiving plate (6) is inserted into the left and right outer peripheral surfaces of the reduced diameter step (20a) in the guide sleeve (20). A possible horizontal plate-shaped protruding piece (23) is formed, and a concave portion (24) substantially complementary to the protruding piece (23) is formed on the lower surface of the enlarged diameter of the guide sleeve (20) opposed thereto. .
[0025]
Downward inclined surfaces (23a) (23a) are formed on both sides of the upper surface of the protruding piece (23).
[0026]
The clearance between the enlarged lower surface of the guide sleeve (20) and the upper surface of the protruding piece (23) is substantially equal to or slightly smaller than the thickness of the support plate (6).
[0027]
The two projecting pieces (23) are inserted into the recessed grooves (10a) of the fitting holes (10), and the reduced diameter steps (20a) of the guide sleeve (20) are fitted into the fitting holes (10). After the mating, the guide sleeve (20) is prevented from being disengaged from the fitting hole (10) by rotating the guide sleeve (20) by approximately 90 °, and the locking sleeve (18) and the support rod fitted therein are fitted. Together with (12), it is firmly supported on the receiving plate (6) (see FIG. 3).
[0028]
As shown in FIG. 5, the left and right legs (14) (14) on the front side of the table (1) have an opening at the lower end and an upper end attached to the lower surface of the top plate (11). ) Is fixed to a metal pipe-shaped outer leg rod (25) to which is fixed, and is vertically movably fitted into the outer leg rod (25) such that a required gap is formed between the inner peripheral surfaces thereof. And an inner leg rod (27) in the form of a metal pipe having an adjuster (26) attached to the floor at the lower end thereof. A plurality of engagement holes (28) having a long oval shape in the direction are formed at predetermined intervals so as to face left and right. The pitch of the engagement holes (28) is substantially equal to the pitch of the engagement holes (16) of the support rod (12).
[0029]
One engagement hole (28) having the same shape as above is also formed on the left and right sides of the upper end of the inner leg rod (27) so as to face each other.
[0030]
A metal cylindrical stopper (29) and a cylindrical member made of a hard synthetic resin are provided at an intermediate portion of the inner leg rod (27) where a plurality of engagement holes (28) are arranged in a row and at an outer peripheral surface of an upper end thereof. A slider (30) is externally fitted so as to be in sliding contact with the inner peripheral surface of the outer leg rod (27).
[0031]
As shown in FIGS. 6 and 7, the cylindrical stopper (29) is formed by abutting the opposing surfaces of a pair of left and right semi-cylindrical stopper pieces (29a) (29a). Has an enlarged flange (31), and a projection (32) which can be selectively engaged with the engagement hole (28) is provided at the center of the inner surface of the upper end.
[0032]
As shown in FIGS. 8 and 9, the cylindrical slider (30) is formed by abutting a pair of left and right semi-cylindrical slider pieces (30a) (30a) facing each other. Is provided with a protrusion (33) that can be engaged with the engagement hole (28) at the upper end.
[0033]
To assemble the legs (14), first, the semi-cylindrical slider pieces (30a) (30a) are engaged with the projections (33) on the inner surface thereof into the engagement holes (28) at the upper end of the inner leg rod (27). In this state, it is fitted into the lower end of the outer leg rod (25) together with the inner leg rod (27) from below.
[0034]
Then, with the projections (32) of the two semi-cylindrical stopper pieces (29a) fitted in the desired engagement holes (28) in the middle part of the inner leg rod (27), the enlarged flange (31) at the lower end is formed. ) Is fitted into the outer leg rod (25) together with the inner leg rod (27) until the upper surface of the outer leg rod (25) contacts the lower end of the opening of the outer leg rod (25).
[0035]
This prevents the outer leg rod (25) and the inner leg rod (27) from moving relative to each other in a direction approaching each other, so that the leg (14) is maintained at a desired length.
[0036]
By selecting the engagement hole (28) into which the projection (32) is fitted, the length of the leg (14) can be adjusted step by step, and the table (1) can be adjusted to another height different from that of the table (1). The support unit (2) can also be installed.
[0037]
When it is desired to change the height of the top plate (11) with the support unit (2) installed, the length of the leg (14) and the rear support rod (12) supported by the support unit (2) are required. And the length of the protrusion from the receiving plate (6) may be adjusted appropriately.
[0038]
The present invention is not limited to the above embodiment.
In the above embodiment, the cylindrical slider (30) has a two-part structure. However, the cylindrical slider (30) has a cylindrical integral structure, and the protrusion (35) is omitted. May be fitted to the upper end of the device by press fitting or the like so as to be immovable in the vertical direction.
[0039]
Further, when the fitting dimension of the inner leg rod (27) into the outer leg rod (25) is small and the margin for adjusting the length of the leg (14) may be small, or the vertical dimension of the cylindrical stopper (29) may be reduced. When the size is large, the cylindrical slider (30) may be omitted.
[0040]
The leg (14) of the present invention can of course be applied to a table, a desk, other fixtures, and the like, which are arranged independently on a normal floor surface, in addition to the workstation table (1). .
[0041]
【The invention's effect】
According to the first aspect of the present invention, the protrusions of the semi-cylindrical stopper pieces are selectively engaged with the engagement holes of the inner leg rod, so that the two semi-cylindrical stopper pieces are connected to the outer periphery of the inner leg rod. The length of the leg can be adjusted stepwise by the number of the engagement holes by a simple operation of fitting the inner leg rod to the outer leg rod together with the surfaces and the inner leg rod together with the outer leg rod from below.
Therefore, it is not necessary to use bolts, lock fittings, and the like as in the related art, and the appearance is improved because they are not exposed to the outside.
Further, since the number of parts and the number of steps for processing the legs are small, the cost can be reduced.
[0042]
According to the second aspect of the present invention, even when the fitting dimension of the inner leg rod into the outer leg rod is large and the leg length adjustment allowance is large, the upper end of the inner leg rod is provided via the cylindrical slider. Since the inner leg is in sliding contact with the inner peripheral surface of the outer leg, there is no danger that the inner leg will shake.
[0043]
According to the third aspect of the present invention, the cylindrical slider can be easily attached to the upper end of the inner leg bar by preventing the slider from moving in the vertical direction.
[0044]
According to the fourth aspect of the present invention, on the lower surface on the rear side of the top plate, a supporting rod provided on the lower surface of the top plate is supported by a fitting hole formed on an upper portion of the support unit of the workstation so as to be adjustable in a vertical position. Therefore, there is no danger that the layout of the workstation will be distorted due to the movement of the table, and the front lower surface of the top plate is supported by adjustable length legs, so that the height of other workstation components etc. Accordingly, the height of the table top can be appropriately adjusted.
In addition, since only the legs whose length on the front side can be adjusted are in contact with the floor, a large space is obtained under the top plate, and the risk of hindering work or the like is reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a leg of the present invention and a table to which the leg is attached are attached to a support unit of a workstation.
FIG. 2 is an enlarged perspective view of a main part of the support form of the table top.
FIG. 3 is also an enlarged vertical sectional side view of a support rod provided on the rear side of the top plate and a support part thereof.
FIG. 4 is a side view of the guide sleeve.
FIG. 5 is a partially cutaway longitudinal side view of the leg of the present invention.
FIG. 6 is a front view of the cylindrical stopper.
FIG. 7 is a cross-sectional plan view taken along the line VII-VII of FIG. 6;
FIG. 8 is a front view of a cylindrical slider.
9 is a cross-sectional plan view taken along the line VIII-VIII in FIG.
[Explanation of symbols]
(1) Table (2) Support unit (3) Support leg (4) Side frame (5) Side beam (6) Support plate (6a) Standing piece (7) Side cover (8) Center beam (9) End cover (10) Fitting hole (10a) Recessed groove (11) Top plate (12) Supporting rod (13) Supporting rod (14) Leg (15) Mounting plate (16) Engaging hole (17) Diameter expanding flange (18) ) Locking sleeve (locking means)
(18a) semi-cylindrical sleeve (19) protrusion (20) guide sleeve (20a) reduced diameter step (21) annular groove (22) annular ridge (23) projection (23a) inclined surface (24) concave ( 25) outer leg rod (26) adjuster (27) inner leg rod (28) engaging hole (29) cylindrical stopper (29a) semi-cylindrical stopper piece (30) cylindrical slider (30a) semi-cylindrical slider piece ( 31) Enlarged flange (32) Projection (33) Projection

Claims

In a leg provided with a cylindrical outer leg rod pointing in the up-down direction and a cylindrical inner leg rod which is vertically movably fitted to the outer leg rod, a plurality of engagements are made on the outer peripheral surface of the inner leg rod. Holes are formed in the vertical direction at predetermined intervals and in opposition to each other, and projections that can selectively engage with the plurality of engagement holes are formed on both sides of the outer peripheral surface of the inner leg rod on the inner surface. A pair of substantially semi-cylindrical stopper pieces provided and having a large diameter flange at the lower end are externally fitted by engaging their projections with desired engagement holes, and the two semi-cylindrical stopper pieces are The enlarged flanges of the two semi-cylindrical stopper pieces are brought into contact with an opening edge of a lower end of the outer leg rod by fitting the lower leg and the outer leg rod together so as to be able to be inserted and removed from below. And adjustable length legs.

2. The length-adjustable leg according to claim 1, wherein a cylindrical slider whose outer peripheral surface is in sliding contact with the inner peripheral surface of the outer leg rod is fitted to the outer peripheral surface of the upper end portion of the inner leg rod so as to be immovable in the vertical direction.

A pair of cylindrical sliders are formed by abutting opposing surfaces of a pair of semi-cylindrical slider pieces with each other, and projecting portions provided on the inner surfaces thereof are formed on the outer peripheral surface of the upper end portion of the inner leg rod. 3. The length adjustable leg according to claim 2, wherein the leg is prevented from moving up and down by engaging with the engagement hole.

An upper end of the leg according to any one of claims 1 to 3, which is fixed to a lower surface of a front portion of the top plate, and a lower end thereof is brought into contact with the floor to support a front portion of the top plate and a rear side of the top plate. A lower support rod having a height-adjustable locking means is provided on the lower surface of the work unit, and this support rod is fitted into a fitting hole formed in an upper part of a horizontally long support unit in a workstation provided on the floor. And a table having adjustable-length legs, wherein a rear portion of the top plate is supported by the support unit by bringing the locking means into contact with an upper surface of the support unit.