JP3434344B2 - Electric table lifter - Google Patents
Electric table lifterInfo
- Publication number
- JP3434344B2 JP3434344B2 JP08266994A JP8266994A JP3434344B2 JP 3434344 B2 JP3434344 B2 JP 3434344B2 JP 08266994 A JP08266994 A JP 08266994A JP 8266994 A JP8266994 A JP 8266994A JP 3434344 B2 JP3434344 B2 JP 3434344B2
- Authority
- JP
- Japan
- Prior art keywords
- screw shaft
- nut
- shaped cross
- drive mechanism
- fixed base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Transmission Devices (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、固定基台と昇降台との
間にX状の交叉リンクを設け、この交叉リンクの開閉作
動により昇降台を上下作動する電動テーブルリフタに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric table lifter which is provided with an X-shaped cross link between a fixed base and a lift table, and which vertically moves the lift table by opening and closing the cross link.
【0002】[0002]
【従来の技術】固定基台と昇降台との間にX状の交叉リ
ンクを設け、この交叉リンクの対向内面に一対の膨出弧
状ガイドを設け、このガイド面の夫々に接して回転する
クサビローラを介在させ、電動式直線作動機構に該クサ
ビローラを接続させた電動テーブルリフタは公知である
(実開平2−40793号公報参照)。2. Description of the Related Art An X-shaped cross link is provided between a fixed base and a lift, a pair of bulging arc-shaped guides are provided on the inner surfaces of the cross link facing each other, and wedge rollers that rotate in contact with the respective guide surfaces. An electric table lifter in which the wedge-shaped roller is connected to an electric linear actuating mechanism is known (see Japanese Utility Model Laid-Open No. 2-40793).
【0003】[0003]
【発明が解決しようとする課題】上記公知の電動式テー
ブルリフタでは、固定基台と昇降台との間の交叉リンク
の対向内面に電動式の駆動機構を介在させ、スクリュー
軸に螺合したナットの回転移動だけでもって交叉小リン
クが拡開して、X状交叉リンクを拡開し昇降台を上昇さ
せていた。その為、重量性の荷重が掛る昇降台に対し、
大きなモータトルクを有する駆動機構を必要としたり、
駆動機構自体も大嵩となって昇降台との間の上下ストロ
ーク間隔が小さくなったり、またコストアップとなった
りし、更にエアー圧や油圧方式のものでは、圧力調整の
為の機構自体が複雑で嵩張る等の問題点があった。In the above-mentioned known electric table lifter, a nut is screwed onto a screw shaft with an electric drive mechanism interposed between the opposing inner surfaces of the cross link between the fixed base and the lifting base. The small cross links were expanded only by the rotational movement of, and the X-shaped cross links were expanded to raise the lifting platform. Therefore, for a lift that is heavily loaded,
It requires a drive mechanism with large motor torque,
The drive mechanism itself becomes bulky, and the vertical stroke distance between it and the lifting platform becomes smaller, and the cost increases, and in the case of air pressure or hydraulic type, the mechanism itself for pressure adjustment is complicated. There was a problem such as being bulky.
【0004】本発明は、叙上のような従来存した諸事情
に鑑み創出されたもので、重量性の荷重が掛る昇降台に
対し、小さなモータトルクを有する駆動機構でも作動で
きるようにし、駆動機構自体も小さなもので済み、昇降
台との間の上下ストローク間隔を大きく採ることがで
き、また、コストダウンを図ることのできる新規な電動
テーブルリフタを提供することを目的とする。The present invention was created in view of the above existing circumstances, and enables a drive mechanism having a small motor torque to operate even for a lift table which is heavily loaded. It is an object of the present invention to provide a novel electric table lifter that requires only a small mechanism itself, can have a large vertical stroke distance between the mechanism and a lifting table, and can reduce the cost.
【0005】[0005]
【課題を解決するための手段】上述した目的を達成する
ため、本願に係る第一の発明にあっては、一対のX状交
叉リンクの中央交叉部を枢着し、X状交叉リンクの一端
を固定基台と昇降台に夫々枢着し、反対側自由端に転動
ローラを設けて固定基台と昇降台に接触し、電動モー
タ、減速機及び連結部を有する駆動軸から成る駆動機構
の上記連結部にスクリュー軸を連結し、該スクリュー軸
にナットを螺合し、このナットとX状交叉リンク間にリ
ンク部材を交叉して構成した交叉小リンクを介在させ、
前記スクリュー軸の一端に固着したストッパー部から弾
性体を介して押圧スライドリングを前記ナットに駆動機
構側へ圧接させて設けたことを特徴とする。In order to achieve the above-mentioned object, in the first invention according to the present application, the central crossing portions of a pair of X-shaped cross links are pivotally attached to one end of the X-shaped cross links. A drive mechanism consisting of a drive shaft having an electric motor, a speed reducer, and a connecting portion, each of which is pivotally attached to a fixed base and an elevating base, and has rolling rollers provided at opposite free ends to contact the fixed base and the elevating base. A screw shaft is connected to the above connecting part, a nut is screwed onto the screw shaft, and a small cross link formed by crossing a link member between the nut and the X-shaped cross link is interposed,
It is characterized in that a pressing slide ring is provided in pressure contact with the nut on the drive mechanism side through an elastic body from a stopper portion fixed to one end of the screw shaft.
【0006】また、本願に係る第二の発明にあっては、
一対のX状交叉リンクの中央交叉部を枢着し、X状交叉
リンクの一端を固定基台と昇降台に夫々枢着し、反対側
自由端に転動ローラを設けて固定基台と昇降台に接触
し、電動モータ、減速機及び連結部を有する駆動軸から
成る駆動機構の上記連結部にスクリュー軸を水平に連結
し、該スクリュー軸にナットを螺合し、このナットとX
状交叉リンク間にリンク部材を交叉して構成した交叉小
リンクを介在させ、固定基台及び昇降台間であって駆動
機構とナット間に前記スクリュー軸と並列に一対のガイ
ド棒を設け、両ガイド棒の夫々一端にストッパー部を設
け、ピストンが弾性体の発条力により開口係止端部に内
側より常時圧接させてある一対のシリンダ筒体を夫々両
ガイド棒に嵌挿しストッパー部に前記ピストンを係止さ
せ、該シリンダ筒体外側に固着したブロックに前記交叉
小リンクの一端を枢着させたことを特徴とする。According to the second invention of the present application,
The center crossing part of the pair of X-shaped cross links is pivotally connected, and one end of the X-shaped cross link is pivotally connected to the fixed base and the lift base respectively, and the rolling roller is provided at the opposite free end to lift and lower the fixed base. The screw shaft is horizontally connected to the connecting portion of the drive mechanism including the drive shaft having the electric motor, the speed reducer and the connecting portion, and the nut is screwed onto the screw shaft.
A small cross link formed by crossing link members between the horizontal cross links is provided, and a pair of guide rods are provided between the fixed base and the lifting platform between the drive mechanism and the nut in parallel with the screw shaft. A stopper portion is provided at each one end of the guide rod, and the pair of cylinder cylinders, in which the piston is constantly pressed against the opening locking end portion from the inside by the elastic force of the elastic body, are fitted into both guide rods, and the piston portion is provided at the stopper portion. Is engaged, and one end of the small cross link is pivotally attached to a block fixed to the outside of the cylinder body.
【0007】そして、本願に係る第三の発明にあって
は、一対のX状交叉リンクの中央交叉部を枢軸で開閉回
動可能に枢着し、X状交叉リンクの一端を固定基台と昇
降台に夫々枢着し、反対側自由端に転動ローラを設けて
固定基台と昇降台に接触し、電動モータ、減速機及び連
結部を有する駆動軸から成る駆動機構の上記連結部にス
クリュー軸を水平に連結し、該スクリュー軸にナットを
螺合し、このナットとX状交叉リンク間にリンク部材を
交叉して構成した交叉小リンクを介在させ、固定基台及
び昇降台間であって駆動機構とナット間に前記スクリュ
ー軸と並列に一対のガイド棒を設け、前記駆動機構側か
ら枢軸にシリンダ筒体の開口端を固着し、該シリンダ筒
体内に前記両ガイド棒の夫々一端に形成したピストンを
往復運動自在に挿入し、シリンダ筒体内であって枢軸と
シリンダ筒体の閉塞端に係止されるピストンとの間にガ
イド棒がシリンダ筒体の閉塞端側に常時附勢されるよう
に弾性体を巻回介在し、ガイド棒の他側にブロックを介
して前記交叉小リンクを枢着したことを特徴とする。In the third aspect of the present invention, the central crossing portions of the pair of X-shaped cross links are pivotally attached to each other so that they can be opened and closed by a pivot, and one end of the X-shaped cross links serves as a fixed base. Each of them is pivotally attached to the lifting table, and a rolling roller is provided at the opposite free end to contact the fixed base and the lifting table, and to the connecting portion of the drive mechanism including the electric motor, the speed reducer, and the drive shaft having the connecting portion. A screw shaft is horizontally connected, a nut is screwed onto the screw shaft, and a small cross link formed by crossing a link member between the nut and the X-shaped cross link is interposed between the fixed base and the lifting platform. There is provided a pair of guide rods in parallel with the screw shaft between the drive mechanism and the nut, the open end of the cylinder barrel is fixed to the pivot shaft from the drive mechanism side, and one end of each of the guide rods is inside the cylinder barrel. Insert the piston formed in the back and forth freely In the cylinder cylinder, an elastic body is wound between the pivot and the piston locked at the closed end of the cylinder cylinder so that the guide rod is constantly urged toward the closed end of the cylinder cylinder. The small cross links are pivotally attached to the other side of the guide rod through a block.
【0008】[0008]
【作用】本発明の電動テーブルリフタでは、駆動機構の
駆動モータを正逆回転することにより、スクリュー軸が
正逆回転し、このスクリュー軸に螺合するナットを進退
作動する。このナットの進退作動に伴って、ナットとX
状交叉リンク間に介在させた交叉小リンクが開閉作動
し、昇降台を固定基台上で上昇作動し且つ下降作動す
る。このとき、昇降台を固定基台上で上昇作動させる場
合、弾性体を介して押圧スライドリングを前記ナットに
常時駆動機構側へ圧接させてあり、この押圧附勢によっ
てスクリュー軸に沿ってのナット回転移動を助長するの
で、駆動モータのモータトルクが小さくても作動し易く
なる。In the electric table lifter of the present invention, the screw shaft rotates forward and backward by rotating the drive motor of the drive mechanism in the forward and reverse directions, and the nut screwed to the screw shaft is moved forward and backward. As the nut moves forward and backward, the nut and X
The small cross links interposed between the cross links are opened and closed to raise and lower the lift base on the fixed base. At this time, when the lift base is lifted on the fixed base, the pressing slide ring is constantly pressed against the nut through the elastic body toward the drive mechanism side, and this pressing force causes the nut along the screw shaft to move. Since the rotational movement is promoted, it becomes easy to operate even if the motor torque of the drive motor is small.
【0009】[0009]
【実施例】以下、図面を参照して本発明の一実施例を説
明する。図1乃至図5に本願に係る第一発明の基本的な
実施例が示してある。図中1が固定基台、2が昇降台、
3がX状交叉リンクで、一対のリンク部材4,4の中央
部を枢軸5で開閉回動可能に連結してある。このX状交
叉リンク3は図3の平面図で示すように前後に対として
配設してある。これらX状交叉リンク3の各リンク部材
4の一端を固定基台1及び昇降台2に枢着6,7してあ
る。一方これらX状交叉リンク3の各リンク部材4の反
対側自由端には転動ローラ8,9を設けて、固定基台1
及び昇降台2の内面に接触させて転動するようにしてあ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show a basic embodiment of the first invention according to the present application. In the figure, 1 is a fixed base, 2 is a lifting platform,
Reference numeral 3 is an X-shaped cross link, and the central portions of the pair of link members 4 and 4 are connected by a pivot 5 so as to be openable and closable. The X-shaped cross links 3 are arranged in front and rear as a pair as shown in the plan view of FIG. One end of each link member 4 of these X-shaped cross links 3 is pivotally attached 6, 7 to the fixed base 1 and the lift 2. On the other hand, rolling rollers 8 and 9 are provided at the opposite free ends of the respective link members 4 of these X-shaped cross links 3 to fix the fixed base 1
Also, the inner surface of the lifting table 2 is brought into contact with the lifting table 2 to roll.
【0010】図中10が駆動機構で、この駆動機構は、
電動モータ11と減速機構12と連結部14を有する駆
動軸13とこの連結部14をカバーするカバーケース1
5とから成り、このカバーケース15の両側面に於いて
前記枢軸5を固着してある。そして17が上記駆動機構
10の駆動軸13の連結部14に連結したスクリュー軸
で、このスクリュー軸17にブロック19を一体的に設
けたナット18を螺合させてある。In the figure, 10 is a drive mechanism, which is
A drive shaft 13 having an electric motor 11, a reduction mechanism 12 and a connecting portion 14, and a cover case 1 for covering the connecting portion 14.
5, and the pivot 5 is fixed to both side surfaces of the cover case 15. A screw shaft 17 is connected to the connecting portion 14 of the drive shaft 13 of the drive mechanism 10, and a nut 18 integrally provided with a block 19 is screwed onto the screw shaft 17.
【0011】さらに、図中20がリンク部材21,21
を交叉して構成した交叉小リンクで、この交叉小リンク
20は夫々の端部を上記ナット18のブロック19とX
状交叉リンク4,4に枢着22,23してこれらの間に
介在させてある。この交叉小リンク20によって固定基
台1及び昇降台2間に駆動機構10及びスクリュー軸1
7を水平状に配置してある。図中100は前記スクリュ
ー軸17の一端にベアリング106を介して取り付けた
ストッパー部であり、このストッパー部100からナッ
ト18側へ係架張設した皿発条またはコイルスプリング
発条あるいはゴム弾性等の弾性体101を介して、スク
リュー軸17に沿って摺動可能に押圧スライドリング1
04を架設し、この押圧スライドリング104を前記ナ
ット18に駆動機構10側へ圧接してある。Further, in the figure, 20 is a link member 21, 21.
The crossing small link 20 is formed by crossing each other, and the crossing small link 20 has the respective ends of the crossing small link 20 and the block 19 of the nut 18 and the X
Pivot links 22 and 23 are attached to the cross links 4 and 4 and are interposed therebetween. With this small cross link 20, the drive mechanism 10 and the screw shaft 1 are interposed between the fixed base 1 and the lift base 2.
7 are arranged horizontally. In the figure, reference numeral 100 denotes a stopper portion attached to one end of the screw shaft 17 via a bearing 106, and a plate spring or coil spring spring or an elastic body such as rubber elasticity stretched from the stopper portion 100 to the nut 18 side. Press slide ring 1 slidably along screw shaft 17 via 101
No. 04 is installed, and the pressing slide ring 104 is pressed against the nut 18 toward the drive mechanism 10 side.
【0012】上記した構成により昇降台2が下降してい
る状態で、駆動機構10の電動モータ11を正転作動す
れば、スクリュー軸17が正回転してナット18を駆動
機構10に近寄るように移動する。このとき、弾性体1
01の発条力により、ナット18に圧接する押圧スライ
ドリング104は、ナット18の回転移動を助長するよ
うに機能し、小型の電動モーター11による小さなモー
タートルクであっても、重量荷物を積載した昇降台2の
上昇動作を容易にすることができ、電動モーター11全
体としての大きさを小さくすることができ、さらに省エ
ネにもつながる。図7に所定の昇降台2の上下ストロー
クに対するモータートルクの特性曲線グラフを示してあ
り、弾性体101の採用により減少トルクを生じること
が解る。このナット18の移動によって交叉小リンク2
0が拡開して、X状交叉リンク3を拡開し昇降台2を上
昇する。同様にして電動モータ11を逆回転すると、ナ
ット18が駆動機構10から遠ざかる方向に移動し、交
叉小リンク20の閉作動によってX状交叉リンク3を閉
作動し、昇降台2を下降する。このとき、ナット18は
弾性体101の発条力に抗してこれを圧縮させながら押
圧スライドリング104をストッパー部100側へ押圧
移動する。When the electric motor 11 of the drive mechanism 10 is rotated in the normal direction while the elevator 2 is descending according to the above-described structure, the screw shaft 17 rotates in the normal direction so that the nut 18 approaches the drive mechanism 10. Moving. At this time, the elastic body 1
The pressing slide ring 104, which is pressed against the nut 18 by the urging force of 01, functions to promote the rotational movement of the nut 18, and even if the small electric motor 11 causes a small motor torque, the lifting slide that loads heavy loads is lifted. The raising operation of the platform 2 can be facilitated, the size of the electric motor 11 as a whole can be reduced, and further energy saving can be achieved. FIG. 7 shows a characteristic curve graph of the motor torque with respect to a predetermined vertical stroke of the lifting platform 2, and it can be seen that the use of the elastic body 101 produces a reduced torque. By moving this nut 18, the small cross link 2
0 expands, the X-shaped cross link 3 expands, and the lift 2 rises. Similarly, when the electric motor 11 is rotated in the reverse direction, the nut 18 moves in a direction away from the drive mechanism 10, and the X-shaped cross link 3 is closed by the closing operation of the cross small link 20 to lower the elevating table 2. At this time, the nut 18 pushes and moves the pressing slide ring 104 toward the stopper portion 100 while compressing the nut 18 against the spring force of the elastic body 101.
【0013】図3乃至図5に本願に係る第二発明の基本
的な実施例が示してあり、固定基台1及び昇降台2間で
あって駆動機構10とナット18間に前記スクリュー軸
17と並列に一対のガイド棒30を架設してあり、両ガ
イド棒30,30の夫々一端にストッパー部100を固
着し、夫々他端を前記駆動機構10のカバーケース15
に固着してある。また、ピストン103が皿発条または
コイルスプリング発条あるいはゴム弾性等の弾性体10
1の発条力により開口係止端部105に内側より常時係
架圧接させて成る一対のシリンダ筒体102を夫々両ガ
イド棒30,30に嵌挿し、前記ストッパー部100に
前記ピストン103を係止するようにしてある。そし
て、シリンダ筒体102外側にはブロック19を固着し
て、このブロック19に前記交叉小リンク20の一端を
枢着22してある。FIGS. 3 to 5 show a basic embodiment of the second invention according to the present application, in which the screw shaft 17 is provided between the fixed base 1 and the lift 2 and between the drive mechanism 10 and the nut 18. A pair of guide rods 30 are installed in parallel with each other, and a stopper portion 100 is fixed to one end of each of the guide rods 30, 30 and the other end thereof is covered with the cover case 15 of the drive mechanism 10.
It is stuck to. Further, the piston 103 is a plate spring, a coil spring spring, or an elastic body 10 such as rubber elasticity.
A pair of cylinder cylinders 102, which are constantly erected and pressed against the opening locking end portion 105 from the inside by the urging force of 1, are fitted into both guide rods 30 and 30, respectively, and the piston 103 is locked to the stopper portion 100. I am doing it. A block 19 is fixed to the outside of the cylinder body 102, and one end of the small cross link 20 is pivotally attached 22 to the block 19.
【0014】上記のような構成により、電動モータ11
を逆転作動し、交叉小リンク20の閉作動によってX状
交叉リンク3を閉作動し、昇降台2を下降する時には、
このシリンダ筒体102が、ナット18と一体になって
ガイド棒30に沿ってストッパー部100側へ移動し、
ピストン103がストッパー部100に圧接係合し、前
記弾性体101を圧縮させながらシリンダ筒体102が
移動する。また、電動モータ11が正転作動してスクリ
ュー軸17が正回転し、ナット18を駆動機構10に近
寄るように移動する際には、弾性体101の発条力によ
りブロック19を介して交叉小リンク20の拡開動作を
助長するように機能し、小型の電動モーター11により
小さなモータートルクであっても、重量荷物を積載した
昇降台2の上昇動作を容易にすることができる。With the configuration as described above, the electric motor 11
When the X-shaped cross link 3 is closed by the closing operation of the small cross link 20 and the lifting table 2 is lowered,
The cylinder tubular body 102 moves integrally with the nut 18 along the guide rod 30 to the stopper portion 100 side,
The piston 103 is brought into pressure contact with the stopper portion 100, and the cylinder body 102 moves while compressing the elastic body 101. Further, when the electric motor 11 operates in the forward direction to rotate the screw shaft 17 in the forward direction and moves the nut 18 toward the drive mechanism 10, the spring force of the elastic body 101 causes the cross link small link via the block 19. The small electric motor 11 facilitates the lifting operation of the elevating table 2 loaded with heavy loads, which functions to promote the expansion operation of the load 20.
【0015】図6に本願に係る第三発明の基本的な実施
例が示してあり、固定基台1及び昇降台2間であって、
駆動機構10とナット18間に前記スクリュー軸17と
並列に一対のガイド棒30を設け、前記駆動機構10側
から枢軸5にシリンダ筒体102の開口端を固着し、該
シリンダ筒体102内に前記両ガイド棒30の夫々一端
に形成したピストン103を往復運動自在に挿入し、シ
リンダ筒体102内であって枢軸5とシリンダ筒体10
2の閉塞端に係止されるピストン103との間にガイド
棒30がシリンダ筒体102の閉塞端側に常時附勢され
るように弾性体101を巻回介在し、ガイド棒30の他
側にはブロック19を固着し、該ブロック19を介して
前記交叉小リンク20を枢着して構成してある。図中図
3乃至図5に示した符号と同一符号をもって示した部材
は同一部材であり、そしてこれら各実施例とも図1乃至
図2に示した実施例と同様に作動する。FIG. 6 shows a basic embodiment of the third invention according to the present application, which is between the fixed base 1 and the lift base 2.
A pair of guide bars 30 are provided in parallel with the screw shaft 17 between the drive mechanism 10 and the nut 18, and the open end of the cylinder barrel 102 is fixed to the pivot shaft 5 from the drive mechanism 10 side. A piston 103 formed at one end of each of the two guide rods 30 is reciprocally inserted therein, and the pivot shaft 5 and the cylinder barrel 10 are inside the cylinder barrel 102.
The elastic body 101 is wound between the piston 103 and the piston 103 locked at the closed end of the guide rod 30 so that the guide rod 30 is always urged toward the closed end side of the cylinder body 102. A block 19 is fixedly attached to the shaft, and the crossing small link 20 is pivotally mounted via the block 19. In the figure, members designated by the same reference numerals as those shown in FIGS. 3 to 5 are the same members, and each of these embodiments operates in the same manner as the embodiment shown in FIGS.
【0016】[0016]
【発明の効果】以上説明したように本発明によれば、一
対のX状交叉リンクの中央交叉部を枢着し、X状交叉リ
ンクの一端を固定基台と昇降台に夫々枢着し、反対側自
由端に転動ローラを設けて固定基台と昇降台に接触し、
電動モータ、減速機及び連結部を有する駆動軸から成る
駆動機構の上記連結部にスクリュー軸を連結し、該スク
リュー軸にナットを螺合し、このナットとX状交叉リン
ク間にリンク部材を交叉して構成した交叉小リンクを介
在させ、前記スクリュー軸の一端に固着したストッパー
部から弾性体を介して押圧スライドリングを前記ナット
に駆動機構側へ圧接させたので、重量性の荷重が掛る昇
降台に対し、小さなモータトルクを有する駆動機構でも
作動でき、駆動機構自体も縦幅員横幅員共に小さなもの
で済み、昇降台との間の上下ストローク間隔も大きく採
ることができ、また、省エネで且つコストダウンを図る
ことができる。As described above, according to the present invention, the central crossing portions of the pair of X-shaped cross links are pivotally attached, and one ends of the X-shaped cross links are pivotally attached to the fixed base and the elevator, respectively. Provide a rolling roller at the free end on the opposite side to contact the fixed base and the lifting platform,
A screw shaft is connected to the connecting portion of a drive mechanism including an electric motor, a speed reducer, and a drive shaft having a connecting portion, a nut is screwed onto the screw shaft, and a link member is crossed between the nut and the X-shaped cross link. Since a small cross link configured as described above is interposed and a pressing slide ring is pressed against the drive mechanism side from the stopper portion fixed to one end of the screw shaft through an elastic body, a heavy load is applied. It can operate with a drive mechanism having a small motor torque for the platform, and the drive mechanism itself can be small in both vertical width and horizontal width, and can have a large vertical stroke interval between the platform and the lifting platform. The cost can be reduced.
【0017】固定基台及び昇降台間であって駆動機構と
ナット間に前記スクリュー軸と並列に一対のガイド棒を
設け、両ガイド棒の夫々一端にストッパー部を設け、ピ
ストンが弾性体の発条力により開口係止端部に内側より
常時圧接させてある一対のシリンダ筒体を、夫々両ガイ
ド棒に嵌挿しストッパー部に前記ピストンを係止させ、
該シリンダ筒体外側に固着したブロックに前記交叉小リ
ンクの一端を枢着させたので、昇降台の上下ストローク
に対する電動モータのモータートルクを効率的に減少さ
せることができ、また、固定基台に対する昇降台の上下
昇降ストロークを適宜大小に可変設定することができ
る。A pair of guide rods are provided between the fixed base and the lifting platform between the drive mechanism and the nut in parallel with the screw shaft, and a stopper portion is provided at one end of each of the guide rods. A pair of cylinder cylinders, which are constantly in pressure contact with the opening locking end portion from the inside by force, are fitted into both guide rods, and the piston is locked to the stopper portion,
Since one end of the small cross link is pivotally attached to the block fixed to the outside of the cylinder body, the motor torque of the electric motor with respect to the vertical stroke of the lifting platform can be efficiently reduced, and the fixed base is fixed. The vertical lifting stroke of the lifting platform can be variably set to a large or small value.
【0018】前記駆動機構側から枢軸にシリンダ筒体の
開口端を固着し、該シリンダ筒体内に前記両ガイド棒の
夫々一端に形成したピストンを往復運動自在に挿入し、
シリンダ筒体内であって枢軸とシリンダ筒体の閉塞端に
係止されるピストンとの間にガイド棒がシリンダ筒体の
閉塞端側に常時附勢されるように弾性体を巻回介在し、
ガイド棒の他側にブロックを介して前記交叉小リンクを
枢着したので、ナット自体に直接押圧負荷が掛からず、
ナットとスクリュー軸との螺合に何等の潰圧損傷を生じ
る惧れなく、モータートルクを効率的に減少させること
ができる。From the drive mechanism side, the open end of the cylinder cylinder is fixed to the pivot, and the pistons formed at one end of each of the guide rods are reciprocally inserted into the cylinder cylinder.
An elastic body is wound between the pivot and the piston locked at the closed end of the cylinder tubular body so that the guide rod is constantly biased toward the closed end side of the cylinder tubular body.
Since the small cross link is pivotally attached to the other side of the guide rod through the block, the nut itself does not receive a pressing load directly,
The motor torque can be efficiently reduced without causing any crushing pressure damage to the screw engagement between the nut and the screw shaft.
【図1】本発明の第一実施例の上昇状態を示した正面図
である。FIG. 1 is a front view showing a lifted state of a first embodiment of the present invention.
【図2】同じく弾性体を設けたスクリュー軸要部の正面
図である。FIG. 2 is a front view of a main part of a screw shaft similarly provided with an elastic body.
【図3】本発明の第二実施例を示した一部断面平面図で
ある。FIG. 3 is a partial cross-sectional plan view showing a second embodiment of the present invention.
【図4】同じくシリンダ筒体要部の取付状態を示した正
面図である。FIG. 4 is a front view showing a mounting state of a cylinder cylinder main part.
【図5】同じくシリンダ筒体要部の下降状態を示した正
面図である。FIG. 5 is a front view showing the lowered state of the main part of the cylinder tubular body.
【図6】本発明の第三実施例を示した一部断面平面図で
ある。FIG. 6 is a partial cross-sectional plan view showing a third embodiment of the present invention.
【図7】本発明のモータートルク対ストローク特性曲線
を示すグラフ図である。FIG. 7 is a graph showing a motor torque-stroke characteristic curve of the present invention.
1 固定基台 2 昇降台 3 X状交叉リンク 4 リンク部材 5 枢軸 6,7 枢着 8,9 転動ローラ 10 駆動機構 11 電動モータ 12 減速機 13 駆動軸 14 連結部 15 カバーケース 16 ブロック 17 スクリュー軸 19 ブロック 20 交叉小リンク 21 リンク部材 22,23 枢着 30 ガイド棒 100 ストッパー部 101 弾性体 102 シリンダ筒体 103 ピストン 104 押圧スライドリング 105 開口係止端部 1 fixed base 2 lifts 3 X-shaped cross links 4 Link members 5 Axis 6,7 pivot 8, 9 Rolling roller 10 Drive mechanism 11 electric motor 12 reducer 13 Drive axis 14 Connection 15 cover case 16 blocks 17 screw shaft 19 blocks 20 small cross links 21 Link member 22,23 pivotal 30 guide rod 100 stopper 101 elastic body 102 cylinder 103 piston 104 Press slide ring 105 Open end
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B66F 7/06 B66F 7/08 B66F 3/12 F16H 21/10 F16H 21/26 B25J 3/02 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B66F 7/06 B66F 7/08 B66F 3/12 F16H 21/10 F16H 21/26 B25J 3/02
Claims (3)
着し、X状交叉リンクの一端を固定基台と昇降台に夫々
枢着し、反対側自由端に転動ローラを設けて固定基台と
昇降台に接触し、電動モータ、減速機及び連結部を有す
る駆動軸から成る駆動機構の上記連結部にスクリュー軸
を連結し、該スクリュー軸にナットを螺合し、このナッ
トとX状交叉リンク間にリンク部材を交叉して構成した
交叉小リンクを介在させ、前記スクリュー軸の一端に固
着したストッパー部から弾性体を介して押圧スライドリ
ングを前記ナットに駆動機構側へ圧接させて設けたこと
を特徴とする電動テーブルリフタ。1. A pair of X-shaped cross links are pivotally attached to a central crossing portion, one ends of the X-shaped cross links are pivotally attached to a fixed base and an elevator, respectively, and rolling rollers are provided at opposite free ends. A screw shaft is connected to the above-mentioned connecting portion of a drive mechanism including an electric motor, a speed reducer, and a drive shaft having a connecting portion, which is in contact with the fixed base and the elevating table, and a nut is screwed onto the screw shaft. A small cross link formed by crossing link members is interposed between the X-shaped cross links, and a pressing slide ring is pressed against the drive mechanism side from the stopper portion fixed to one end of the screw shaft via an elastic body. An electric table lifter characterized in that it is provided with.
着し、X状交叉リンクの一端を固定基台と昇降台に夫々
枢着し、反対側自由端に転動ローラを設けて固定基台と
昇降台に接触し、電動モータ、減速機及び連結部を有す
る駆動軸から成る駆動機構の上記連結部にスクリュー軸
を水平に連結し、該スクリュー軸にナットを螺合し、こ
のナットとX状交叉リンク間にリンク部材を交叉して構
成した交叉小リンクを介在させ、固定基台及び昇降台間
であって駆動機構とナット間に前記スクリュー軸と並列
に一対のガイド棒を設け、両ガイド棒の夫々一端にスト
ッパー部を設け、ピストンが弾性体の発条力により開口
係止端部に内側より常時圧接させてある一対のシリンダ
筒体を夫々両ガイド棒に嵌挿しストッパー部に前記ピス
トンを係止させ、該シリンダ筒体外側に固着したブロッ
クに前記交叉小リンクの一端を枢着させたことを特徴と
する電動テーブルリフタ。2. A center crossing portion of a pair of X-shaped cross links is pivotally attached, one ends of the X-shaped cross links are pivotally attached to a fixed base and an elevator, respectively, and rolling rollers are provided at opposite free ends. The screw shaft is horizontally connected to the connecting portion of the drive mechanism including the electric motor, the speed reducer and the drive shaft having the connecting portion, which is in contact with the fixed base and the elevating table, and the nut is screwed onto the screw shaft. A small cross link formed by linking a link member between the nut and the X-shaped cross link is interposed, and a pair of guide rods are provided between the fixed base and the lifting platform between the drive mechanism and the nut in parallel with the screw shaft. A stopper portion is provided at each one end of both guide rods, and a pair of cylinder cylinders in which the piston is constantly in pressure contact with the opening locking end portion from the inside by the elastic force of the elastic body are inserted into both guide rods, respectively, and stopper portions are provided. Lock the piston to An electric table lifter, wherein one end of the small cross link is pivotally attached to a block fixed to the outside of the cylinder body.
軸で開閉回動可能に枢着し、X状交叉リンクの一端を固
定基台と昇降台に夫々枢着し、反対側自由端に転動ロー
ラを設けて固定基台と昇降台に接触し、電動モータ、減
速機及び連結部を有する駆動軸から成る駆動機構の上記
連結部にスクリュー軸を水平に連結し、該スクリュー軸
にナットを螺合し、このナットとX状交叉リンク間にリ
ンク部材を交叉して構成した交叉小リンクを介在させ、
固定基台及び昇降台間であって駆動機構とナット間に前
記スクリュー軸と並列に一対のガイド棒を設け、前記駆
動機構側から枢軸にシリンダ筒体の開口端を固着し、該
シリンダ筒体内に前記両ガイド棒の夫々一端に形成した
ピストンを往復運動自在に挿入し、シリンダ筒体内であ
って枢軸とシリンダ筒体の閉塞端に係止されるピストン
との間にガイド棒がシリンダ筒体の閉塞端側に常時附勢
されるように弾性体を巻回介在し、ガイド棒の他側にブ
ロックを介して前記交叉小リンクを枢着したことを特徴
とする電動テーブルリフタ。3. A pair of X-shaped cross links having central crossing portions pivotally attached to each other such that they can be opened and closed by a pivot, and one end of each X-shaped cross link is pivotally attached to a fixed base and an elevator, respectively, and opposite free ends. A rolling roller is provided in contact with the fixed base and the lifting table, and the screw shaft is horizontally connected to the connecting portion of the drive mechanism including the drive shaft having the electric motor, the speed reducer and the connecting portion, and the screw shaft is connected to the screw shaft. A nut is screwed, and a small cross link formed by crossing a link member between the nut and the X-shaped cross link is interposed,
A pair of guide rods are provided in parallel with the screw shaft between the fixed base and the lifting platform between the drive mechanism and the nut, and the open end of the cylinder barrel is fixed to the pivot shaft from the drive mechanism side, A piston formed at one end of each of the guide rods is reciprocally inserted into the cylinder, and the guide rod is inserted between the pivot and the piston locked at the closed end of the cylinder in the cylinder. An electric table lifter in which an elastic body is wound so as to be constantly urged to the closed end side of the above, and the cross small link is pivotally attached to the other side of the guide rod through a block.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08266994A JP3434344B2 (en) | 1994-03-30 | 1994-03-30 | Electric table lifter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP08266994A JP3434344B2 (en) | 1994-03-30 | 1994-03-30 | Electric table lifter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07267594A JPH07267594A (en) | 1995-10-17 |
JP3434344B2 true JP3434344B2 (en) | 2003-08-04 |
Family
ID=13780844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP08266994A Expired - Fee Related JP3434344B2 (en) | 1994-03-30 | 1994-03-30 | Electric table lifter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3434344B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100511029B1 (en) * | 2002-09-04 | 2005-08-31 | 한국과학기술연구원 | Flexible Screw Type Height Control Device |
JP2006264965A (en) * | 2005-03-25 | 2006-10-05 | Daifuku Co Ltd | Lifter device |
US8733508B2 (en) * | 2010-04-02 | 2014-05-27 | Herkules Equipment Corporation | Scissor lift assembly |
RU2535772C2 (en) * | 2010-07-05 | 2014-12-20 | Коне Корпорейшн | Compensator and elevator |
EP4249420A1 (en) * | 2022-03-21 | 2023-09-27 | Siemens Aktiengesellschaft | Load balancing device for a lifting application with an article to be lowered or raised |
-
1994
- 1994-03-30 JP JP08266994A patent/JP3434344B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07267594A (en) | 1995-10-17 |
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