EP0613852B1 - Table élévatrice à ciseaux - Google Patents

Table élévatrice à ciseaux Download PDF

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Publication number
EP0613852B1
EP0613852B1 EP94102702A EP94102702A EP0613852B1 EP 0613852 B1 EP0613852 B1 EP 0613852B1 EP 94102702 A EP94102702 A EP 94102702A EP 94102702 A EP94102702 A EP 94102702A EP 0613852 B1 EP0613852 B1 EP 0613852B1
Authority
EP
European Patent Office
Prior art keywords
scissor
piston
lifting
type lifting
table according
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 - Lifetime
Application number
EP94102702A
Other languages
German (de)
English (en)
Other versions
EP0613852A1 (fr
Inventor
Hermann Janzen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HYDRAULIK TECHNIEK
Original Assignee
HYDRAULIK TECHNIEK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HYDRAULIK TECHNIEK filed Critical HYDRAULIK TECHNIEK
Publication of EP0613852A1 publication Critical patent/EP0613852A1/fr
Application granted granted Critical
Publication of EP0613852B1 publication Critical patent/EP0613852B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/16—Tables with tops of variable height with means for, or adapted for, inclining the legs of the table for varying the height of the top, e.g. with adjustable cross legs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • the invention relates to a scissor lift table according to the preamble of claim 1.
  • the invention has for its object a scissor lift table of the type mentioned Reduction of the technical effort so that this allows a flat and space-saving design when the scissor arms are in the lowered position and a long stroke of the table platform can be reached via a uniform lifting movement.
  • the scissor-type lifting table according to the invention has, with the lifting rocker, a stroke-introducing member connected to the piston / cylinder unit, which forms an operative connection with a coaxial connection, provided on the one hand directly in the intersection joint, to the respective scissor arms, the articulation of the piston rod end arranged parallel to the axis, and the pressure roller supported on the other hand.
  • a stroke-introducing member connected to the piston / cylinder unit, which forms an operative connection with a coaxial connection, provided on the one hand directly in the intersection joint, to the respective scissor arms, the articulation of the piston rod end arranged parallel to the axis, and the pressure roller supported on the other hand.
  • a corresponding connection of the table platform to the scissor arm ends causes their mutual spreading, whereby after a certain stroke path a system part simultaneously entering a connection engagement on the lifting rocker on at least one scissor arm enables continuous pressure entry from the piston / cylinder unit, the further piston displacement thereof is deflected via a constant lever arm formed on the lifting rocker and the table platform can thus be moved into the end of stroke position with a largely constant internal cylinder pressure.
  • a scissor lift table 1 designated as a whole as 1, designed as a flat lift table, the scissor arms 5, which are arranged along a longitudinal edge and are paired with each other in a cross joint 4,4 ', between a bottom frame 2 and an upper table platform 3, 6 or 7.8.
  • the table platform 3 is provided with an E-shaped, respective outer plate regions 9, 10 and a central region 11 having a plate contour with which, for example, a lifting tool (not shown) can reach under the objects located on the table platform 3 via respective shape recesses 12, 13. It is also conceivable to design the table platform 3 as a continuous plate or with a U-shaped plate contour for other applications, in particular one requiring a flat construction.
  • a side view of the scissor lift table 1 illustrates a connection provided in opposite end regions 14, 15 and 16, 17 of the scissor arms 5, 6, one end of which is fixed via a pivot bearing 18, 19 and the other end via a floating bearing 20, 21 is formed on the underside of the table platform 3 or the top of the lower frame 2 so that the table platform 3 can be brought into different lifting heights H (FIG. 2), H '(FIG. 3) and H' '(FIG. 4).
  • the pairs of scissors arms 5, 6 and 7, 8 are each in the area of the scissor arms 6 and 8 supported by the fixed pivot bearing 19, 19 'with an as Hydraulic cylinder trained piston / cylinder unit 23,24, which extends between respective legs 25,26 and 27,28 of the scissor arms 6 and 8 respectively.
  • the hydraulic cylinders 23, 24 are fixed at one end in the area of their cylinders 33, 34 to a lower cross member 30 (FIG. 1) located between the respective pivot bearings 19, 19 'of the scissor arms 6, 8, and respective support bearings 31, 32, and Piston rods 36, 37 movable via fluid pressure in a central longitudinal plane 35 of the piston / cylinder unit 23, 24 are connected at the other ends in the respective head region 39 via a piston rod linkage 38 with an expansion lever 40 (FIG. 1) or 40 '(not visible).
  • the spreading lever 40 acts as one between the respective inner legs 25 ', 26' or 27 ', 28' of the respective pair of scissor arms 5, 6 or 7,8 located rocker arm 42 is formed which on one end has a connecting part 43 coaxial to the intersection joint 4 or 4 ', on the other end a pressure roller 44 and axially parallel between the intersection joint 4 and the pressure roller axis 45 which, in the lowered position of the table platform 3, advantageously above the central longitudinal plane 35 the piston / cylinder unit 23, 24 has the piston rod linkage 38 (FIG. 2).
  • Stroke position H'd be brought about by the fact that the movement of the piston rods 36, 37 with a superimposed stroke-swivel movement in the area of the lifting arms 42, 42 'raises the cross joints 4,4', so that the lifting arm 42, 42 'is supported the rolling pressure roller 44 on the underside of the table platform 3 executes a pivoting of the lifting arms 42, 42 ′ and the pairs of scissors arms 5, 6 are raised into the spreading position according to FIG. 3 via the bearings 18 and 20 on the table platform 3.
  • the one with the table platform 3 is via the floating bearing 20 connected scissor arm 6 supported on the table platform 3 via a length 50 matched to the above-described swivel path or support area 48 of the lifting rocker 42, so that the lifting forces introduced via the pressure roller 44 on the scissor arms 5.6 and 7.8 both form a vertical spreading force component in the bearing 20 as well as in the bearing 18 and thus a uniform component load is achieved.
  • the piston rod linkage 38 located above the central longitudinal plane 35 of the piston / cylinder unit 23, 24 forms an asymmetrical one in the region of the respective piston rods 36, 37 Force transmission, the effectiveness of which can be increased further in that the respective cylinders 33, 34 in the area of their support bearings 31, 32 have a support 53, which is also asymmetrical with respect to the central longitudinal plane 35, and thus the scissor lift table 1 on the respective lifting arm 42, 42 '.
  • a pressure action plane 52 is shown as a connecting line between the linkage 38 and the support 53.
  • respective force introduction levers are formed with the pressure action plane 52 both between the respective piston rod linkage 38 and the cross joint 4 and between the piston rod linkage 38 and the pressure roller 44, with which the scissor lift table 1 can be designed in a particularly space-saving flat design so that the Spreading or lifting as described above with only one piston / cylinder unit 23,24 can be carried out in the respective scissor arm pairs 5,6 or 7,8.
  • a high mechanical efficiency can thus be achieved with reduced technical complexity and a uniform stroke movement over a large stroke distance, for example up to 1000 mm, can be achieved via a cylinder pressure which is largely constant in all stroke positions H, H ', H''.
  • FIGS. 5 and 6 enlarged detail representations in the area of the lifting rocker 42 illustrate a distance 54 which forms the effective lever length between the piston rod linkage 38 and the cross joint 4 and which extends from the lowered position H (FIG. 2) to the position H '(FIG. 3, Fig. 6) changes and with further increasing spreading of the scissor arms 5, 6 via the abutment of the stop parts 46 in the molded part 47, 47 ', this distance 54 remains effective as a constant lever arm until the table platform 3 reaches the stroke position H' '(FIG. 4, Fig. 5) has reached.
  • the lifting rocker 42 is illustrated in an advantageous illustration of its advantageous design as a cross-stiffened double member 55, with one end of a connecting sleeve 43 'supported in the region of the cross joint 4 between the connecting parts 43 between the pressure plates 56, 57 and the other on the other a support pin 44 'located pressure roller 44 and between these the piston rod linkage 38 are provided.
  • FIG. 9 The installation position of the lifting rocker 42 according to FIG. 9 clarifies in connection with FIG. 8 that the pressure plates 56, 57 located between the respective pair of scissor arms 25 ', 26' each form a part 47,47 'forming groove 58,58' (Fig. 8), into each of which a pin 59,59 'provided as the stop member 46,46' and supported on the inner legs 25 ', 26' of the pairs of scissors arms can be pivoted.
  • the piston / cylinder unit 23, 24 is provided in the area of the respective head region 39 with an inlet recess 60 (FIG. 6), so that in the lowered position according to FIG. Cylinder unit 23, 24 allowing free space is reached and thus the components of the scissor lift table 1 can be lowered to an overall height forming the lifting height H without an overhang and good handling of the scissor lifting table 1 is made possible even in confined spaces.
  • FIG. 10 shows a second embodiment of a scissor lift table 101 which, in the area of the cross joint 4 as the spreading lever 40, has a double lifting arm 142 (FIG. 12) and its scissor arms 5,6 (or 7,8) with simultaneous action are spread by two piston / cylinder pairs 23, 123 and 24, 124 (not visible).
  • FIG. 11 illustrates that the double rocker arm 142 and the scissor lift table 101 can be moved into the illustrated lifting position H 'in that a simultaneous working stroke of the two piston rods 36 of the piston-cylinder pair 23, 123 that are effective in one direction of rotation the double lifting arm 142 is imparted a superimposed lifting and pivoting movement in the region of the cross joint 4, around which the double lifting arm 142 is supported on the one hand the rolling pressure roller 44 on the underside of the table platform 3 and, on the other hand, the pressure roller 144 on the subframe 2 pivots and the bearings 18 and 20 raise the pairs of scissors arms 5, 6 to the spread position according to FIG. 10.
  • the individual representation of the double rocker arm 142 according to FIG. 12 shows its design with the respective effective pressure rollers 44, 144 grouping around the bore for the intersection joint 4, the two piston rod linkages 38, the distances 54, 154 and the shaped grooves 58, via which, in the manner described above Lifting force of the piston / cylinder units 23, 123 can simultaneously be transferred to the scissor arms 5, 6 (FIG. 10).
  • the scissor lift table 101 having the double lifting rocker 142 can thus be provided for lifting larger weights, so that the possible uses of the lifting table are improved overall.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Machine Tool Units (AREA)

Claims (13)

  1. Table élévatrice à ciseaux, comportant, entre un cadre inférieur côté sol (2) et une plate-forme de table supérieure (3), au moins une paire de branches de ciseaux (5, 6; 7, 8) qui sont reliées l'une à l'autre en une articulation en croix (4) et qui, dans des zones d'extrémité opposées (14, 15; 16, 17), prennent appui, pour les premières extrémité, au niveau d'un pivot fixe (18, 19), et, pour les autres extrémités, au niveau d'un pivot mobile (20, 21) respectivement sur le cadre inférieur (2) et sur la plate-forme de table (3), sachant que dans une position de départ proche du cadre inférieur dans la zone d'au moins une branche de ciseaux (6, 8) ladite plate-forme de table est attaquée par en dessous par un levier d'écartement (40) pourvu d'un galet de pression (44; 144), situé à l'extrémité extérieure (39) de la tige de piston d'une unité de piston/cylindre (23, 24) et destiné à amorcer une levée initiale de la plate-forme de table (3), caractérisée en ce que le levier d'écartement (40) se présente sous la forme d'une biellette de levage (42) disposée entre les ailes intérieures respectives (25', 26'; 27', 28') d'au moins une des paires de branches de ciseaux (5, 6; 7, 8), cette biellette de levage comportant au moins à une extrémité une partie de liaison disposée sur le même axe que l'articulation en croix (4), à l'autre extrémité le galet de pression (44) et sur un axe parallèle entre l'articulation en croix (4) et l'axe du galet de pression (45) une articulation de tige de piston (38) se trouvant, dans la position d'abaissement, au-dessus du plan longitudinal central (35) de l'unité de piston/cylindre (23; 24).
  2. Table élévatrice à ciseaux suivant la revendication 1, caractérisée en ce que la biellette de levage (42) permet de former, par l'intermédiaire d'une partn d'un élément d'appui (31, 32) fixant le cylindre (33, 34) de l'unité de piston/cylindre (23, 24) dans la zone d'extrémité à proximité du pivot fixe (18, 19) de la branche de ciseaux (6, 8), d'autre part, de l'articulation de tige de piston (38), et du galet de pression (44), une liaison active avec la plate-forme de table (3) et d'amener cette dernière dans une position finale de levage avec seulement une unité de piston/cylindre (23, 24) par paire de branches de ciseaux (5, 6 ; 7, 8) qui attaque par en dessous la plate-forme de table (3) et qui présente, à chaque phase de levage (H; H'; H''), une pression interne de cylindre largement constante.
  3. Table élévatrice à ciseaux suivant la revendication 1 ou 2, caractérisée en ce que la biellette de levage (42) comporte une partie façonnée (47, 47') limitant son angle de pivotement au cours d'une première phase de levage (H') par l'intermédiaire d'un organe de butée (46, 46') montée dans la zone de chaque aile intérieure (25', 26').
  4. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que la plate-forme de table (3), comportant une zone d'appui (48) au niveau de sa face inférieure, est attaquée par en dessous par le galet de pression (44) prévu sur la biellette de levage (42), de telle sorte que, lors d'une première phase de levage (H') limitée par le pivotement de l'organe de butée (46, 46') dans la partie façonnée (47, 47'), un engagement d'appui soit formé.
  5. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 4, caractérisée en ce que la branche de ciseaux (6) reliée à la plate-forme de table (3) par un pivot mobile (20) est relié à la plate-forme de table (3) par l'intermédiaire d'un rebord de contact de roulement en retour (51) adapté en longueur (50) au trajet de pivotement de la biellette de levage (42).
  6. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 5, caractérisée en ce que le cylindre (33; 34) de l'unité de piston/cylindre (23; 24) présente dans la zone du pivot fixe (19, 19') un support (53, 53') décalé par rapport au plan longitudinal central de ladite unité de piston/cylindre.
  7. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 6, caractérisée en ce que la biellette de levage (42) se présente sous la forme d'un élément double renforcé transversalement (55), entre les plaques de poussée (56, 57) duquel est prévue l'articulation de tige de piston (38) coopérant avec l'élément de liaison (43) dans la zone de l'articulation en croix (4) et avec le galet (44).
  8. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 7, caractérisée en ce que les plaques de poussée (56, 57), situées entre les branches de ciseaux respectives (25', 26'; 27', 28') d'une paire de branches respective, comportent chacune une rainure (58) formant la partie façonnée (47, 47'), dans laquelle un tenon respectif (59, 59') prévue en tant qu'organe de butée (46, 46') et prenant appui sur les ailes intérieures (25', 26') de la paire de branches de ciseaux (5, 6) peut être amenée à pivoter.
  9. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 8, caractérisée en ce que les plaques de poussée (56, 57) sont pourvues, dans la zone de l'articulation en croix (4), d'une douille de liaison coaxiale (43').
  10. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 9, caractérisée en ce que deux paires de branches de ciseaux (5, 6 et 7, 8) sont prévues et comprennent chacune une unité de piston/cylindre (23, 24) et une biellette de levage (42, 42').
  11. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 10, caractérisée en ce que la plate-forme de table (3) est pourvue, dans la zone d'appui (48) pour le galet de pression (44), d'une plaque de stabilisation sur sa face inférieure.
  12. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 11, caractérisée en ce que l'unité de piston/cylindre (23, 24) est pourvue dans la zone de l'extrémité de la tige de piston (39) d'une échancrure de réception (60).
  13. Table élévatrice à ciseaux suivant l'une quelconque des revendications 1 à 12, caractérisée en ce que le levier d'écartement (40) se présente sous la forme d'une double biellette de levage (142) comportant deux unités de piston/cylindre (23, 123), sachant que dans la position de départ, lesdites unités de piston/cylindre prennent appui, l'une (23) au-dessus et l'autre (123) en dessous du plan longitudinal central (35), par l'intermédiaire des articulations de tiges de pistons (38) montées à égale distance radiale de l'articulation en croix (4).
EP94102702A 1993-03-02 1994-02-23 Table élévatrice à ciseaux Expired - Lifetime EP0613852B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9302967U 1993-03-02
DE9302967U DE9302967U1 (fr) 1993-03-02 1993-03-02

Publications (2)

Publication Number Publication Date
EP0613852A1 EP0613852A1 (fr) 1994-09-07
EP0613852B1 true EP0613852B1 (fr) 1997-11-05

Family

ID=6890031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94102702A Expired - Lifetime EP0613852B1 (fr) 1993-03-02 1994-02-23 Table élévatrice à ciseaux

Country Status (3)

Country Link
EP (1) EP0613852B1 (fr)
AT (1) ATE159918T1 (fr)
DE (2) DE9302967U1 (fr)

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US11464325B1 (en) 2015-01-24 2022-10-11 Office Kick, Inc. Desktop workspace that adjusts vertically

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US6601826B1 (en) 1999-10-12 2003-08-05 Snap-On Technologies, Inc. Low-level lift
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DE102009002613A1 (de) * 2009-04-23 2010-11-25 Maha Maschinenbau Haldenwang Gmbh & Co. Kg Scherenhebebühne
IT201600091179A1 (it) * 2016-09-09 2018-03-09 Goppion Spa Vetrina museale con sistema di azionamento motorizzato per cassetti
US10893748B1 (en) 2017-07-08 2021-01-19 Office Kick, Inc. Height adjustable desktop
CN109850802A (zh) * 2019-03-29 2019-06-07 中科微至智能制造科技江苏有限公司 托盘举升装置
DE102021004855A1 (de) 2020-10-15 2022-04-21 Sew-Eurodrive Gmbh & Co Kg Hubvorrichtung, insbesondere für ein Transportfahrzeug, und Transportfahrzeug
CN115676402A (zh) * 2022-09-30 2023-02-03 高振佳 一种农作物栽培营养土均匀铺种设备

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US11464325B1 (en) 2015-01-24 2022-10-11 Office Kick, Inc. Desktop workspace that adjusts vertically
US11470959B1 (en) 2015-01-24 2022-10-18 Office Kick, Inc. Desktop workspace that adjusts vertically
US11800927B1 (en) 2015-01-24 2023-10-31 Office Kick, Inc. Desktop workspace that adjusts vertically
US11849843B1 (en) 2015-01-24 2023-12-26 Office Kick, Inc. Desktop workspace that adjusts vertically
US11857073B1 (en) 2015-01-24 2024-01-02 Office Kick, Inc. Desktop workspace that adjusts vertically
US11864654B1 (en) 2015-01-24 2024-01-09 Office Kick, Inc. Desktop workspace that adjusts vertically
US11910926B1 (en) 2015-01-24 2024-02-27 Office Kick, Inc. Desktop workspace that adjusts vertically
US11925264B1 (en) 2015-01-24 2024-03-12 Office Kick, Inc. Desktop workspace that adjusts vertically
US11944196B1 (en) 2015-01-24 2024-04-02 Office Kick, Inc. Desktop workspace that adjusts vertically
US11950699B1 (en) 2015-01-24 2024-04-09 Office Kick, Inc. Desktop workspace that adjusts vertically
US11980289B1 (en) 2015-01-24 2024-05-14 Office Kick, Inc. Desktop workspace that adjusts vertically

Also Published As

Publication number Publication date
DE9302967U1 (fr) 1993-04-22
ATE159918T1 (de) 1997-11-15
DE59404495D1 (de) 1997-12-11
EP0613852A1 (fr) 1994-09-07

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