EP1135323A2 - Scherenhubtisch - Google Patents
ScherenhubtischInfo
- Publication number
- EP1135323A2 EP1135323A2 EP99966839A EP99966839A EP1135323A2 EP 1135323 A2 EP1135323 A2 EP 1135323A2 EP 99966839 A EP99966839 A EP 99966839A EP 99966839 A EP99966839 A EP 99966839A EP 1135323 A2 EP1135323 A2 EP 1135323A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- scissor
- lift table
- table according
- frame
- scissor lift
- 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.)
- Granted
Links
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a scissor lifting table with a lower frame, an upper frame forming a table level and a scissor mechanism acting between the lower frame and the upper frame, the scissor mechanism comprising intersecting inner and outer scissor members which are used to raise or lower the upper frame by means of a Drive can be actuated.
- Scissor lift tables have been known in practice for many years.
- the drives disclosed there, together with the actuating element which applies force to the scissor members, belong to the prior art and will not be discussed further below.
- a generic scissor lift table is known in which the free ends of the scissor members are pivotally connected on one side to the upper and lower frames via fixed articulated axes.
- the free ends of the scissor links are equipped with rollers and run in the guide rails associated with the upper frame and the lower frame. If the scissor mechanism is erected by the gear motor provided there, the ends of the scissor links with fixed articulated axes remain stationary on one side of the two frames. The opposite free ends of the scissor links roll towards the center when the scissor mechanism is erected, thus approaching the fixed ends of the scissor links with respect to the two frames, which results in the uprighting movement and thus the lifting of the table level.
- the generic scissor lift table is particularly problematic when heavy loads have to be lifted by a very considerable height or by a very considerable stroke of the scissors mechanism.
- the side of the frame on which the free ends of the scissor links are equipped with rollers there is a very considerable overhang of the upper frame or the table level, which causes instability of the table level.
- a heavy object positioned centrally in the lower position of the scissor mechanism is located after the full stroke far outside the center of the scissor mechanism, so that very considerable forces act on the mechanism via unreasonably large lever arms. This then occurring load can lead to a tilting of the entire scissor lift table or even to mechanical deformation of components.
- individual components or assemblies of the scissor lift table are loaded to such a degree that the service life of the entire scissor lift table is considerably reduced.
- the present invention is based on the object of designing and developing a scissor lift table of the generic type such that a one-sided or asymmetrical overhang of the table level is effectively avoided even when the scissor mechanism is raised.
- a generic scissor lift table is characterized in that the scissor links run with all free ends in the guide rails permanently assigned to the frame and that the entire scissor mechanism can be positioned by means of a steering device acting between the scissor mechanism and the frame in such a way that it is at least largely in any angular position of the scissor links is positioned centrally to or under the upper frame.
- the entire scissor mechanism can be positioned by means of a steering device acting between the scissor mechanism and the frame with freely movable ends of the scissor links in such a way that it is at least largely in the center or below the upper frame in any angular position of the scissor links and thus is positioned under the table level.
- the steering device therefore acts like a kind of anchor and positions the scissor mechanism in the middle under the table level regardless of the lifting condition of the scissor mechanism, namely by positioning the crossing points of the scissor links exactly in the center under or over the frame.
- the formation of a one-sided overhang is effectively avoided by implementing double-sided floating bearings, so that centrally positioned loads are unproblematic for the scissor lift table according to the invention, regardless of the lifting condition.
- the steering device could have at least one steering arm extending between one of the scissor members and a fixed upper articulation point on the upper frame. In this respect, the central positioning relative to the upper frame would be guaranteed. Furthermore, it is possible for the steering device to comprise at least one steering arm extending between one of the scissor links and a fixed lower articulation point on the lower frame. If a total of two steering arms are provided - for connection on the one hand to the upper frame and on the other hand to the lower frame - these could be assigned to a single scissor link. It is also conceivable to assign the steering arms to a pair of scissor members, advantageously to the outer scissor members, which results in an unimpeded outer arrangement of the steering arms.
- the articulation points provided on the frame are advantageously formed approximately centrally on the upper frame and on the lower frame.
- the crossing points of the scissor links are centered in any case centrally under the table level or under the upper frame, even if the steering arm is articulated approximately centrally between the free ends of the scissor links and the crossing point of the scissor links on the respective scissor joint.
- rollers are arranged on the free ends of the scissor members and run in the guide rails of the frame. These rollers can be designed such that they are positively guided in the guide rails. Any configuration of the guide rails and the rollers matched to them are conceivable.
- the guide rails could extend over the entire width of the frame, wherein the articulation points for the steering arms can be formed on the side of the guide rails or on the frame itself. It is also conceivable that guide rails extending on both sides of the articulation points up to the edge region of the frame are arranged, the stroke of the scissor mechanism being limited by the extent to which the guide rails extend to the articulation point or to the center. In this respect, the guide rails could have a stroke limitation or a stop toward the central articulation point. This applies to both the upper frame and the lower frame. There are now various possibilities for designing and developing the teaching of the present invention in an advantageous manner.
- FIG. 1 shows a schematic representation of an embodiment of a scissor lifting table according to the invention with the lifting mechanism extended;
- FIG. 2 shows the object from FIG. 1 with a reduced lifting height
- FIG. 3 shows the object from FIGS. 1 and 2 in the lowered zero position
- FIG. 4 shows a schematic plan view of a further embodiment of a scissor lift table according to the invention.
- FIG. 5 shows the object from FIG. 4 in the lowered state and in section along the line A-A;
- Fig. 6 shows the object of Fig. 4 in the raised state in section along the line A-A and
- Fig. 7 shows the object of Fig. 5 in the lowered state in section along the line section B-B.
- FIG. 1 to 3 together show a scissor lift table according to the invention with a lower frame 1, an upper frame 3 forming a table level 2 and a scissor mechanism 4 acting between the lower frame 1 and the upper frame 3, the scissor mechanism 4 intersecting inner and outer Scissor members 5, 6, which are used to raise or lower the upper Frame 3 or the table level 2 can be actuated by means of a drive, not shown in the figures.
- the scissor members 5, 6 run with all free ends 7 in the frames 1, 3 permanently assigned guide rails 8.
- the entire scissor mechanism 4 can be positioned by means of a steering device 9 acting between the scissor mechanism 4 and the frame 1, 3 such that it can be positioned in each Angular position of the scissor members 5, 6 is positioned at least largely centrally to or below the upper frame 3 and thus below the table level 2.
- the steering device 2 comprises steering arms 12 extending between the scissor members 6 and fixed articulation points 10, 11. These steering arms 12 are pivotally connected to the upper articulation point 10 and the lower articulation point 11, for example via fixed articulation axes 13. The steering arms 12 are likewise connected in a rotationally fixed manner to the outer scissor members 6, and likewise via fixed articulation axes 14.
- rollers 16, which run in the guide rails 8 of the frames 1, 3, are arranged on the free ends 7 of the scissor members 5, 6.
- the guide rails 8 are of split design and extend on both sides of the articulation points 10, 11 to the edge region of the frames 1, 3, as a result of which a stroke limitation is realized.
- the scissor lift table shown in FIGS. 4 to 7 essentially consists of a plate 116 which holds the material to be lifted and a scissor-like set-up device which is connected to the underside of the plate 116 and consists of first scissor legs 103 and second scissor legs 106.
- the first Scissor legs 103 are pivotally mounted at the upper end 105 and horizontally movable at the lower end 104 on a guide rail 102, for example via a roller 117.
- guide elements 109 are attached as guideways, which, as shown in FIGS. 4 and 7, are arranged within the second scissor legs 106, in contrast to, for example, the prior art (DE 34 34 130 A1), where guideways between the inner ones and the outer scissor legs are arranged.
- An upper horizontally arranged guide rail 113 serves for guiding, for example with a roller 118, the second scissor legs 106, which are pivotably mounted at the lower end 108.
- a carriage 110 is arranged in the pivotable scissor legs 106 and can be moved in the longitudinal direction of the second scissor legs 106 with the aid of a drive 112. In the example shown, this is done using a roller 119.
- an electric motor is selected as the drive 112, which is connected to the carriage 110 via a spindle 111. It is of course also conceivable to provide a hydraulic drive, in which case a piston rod (not shown) would be present between the drive and the carriage 110. The same applies to a pneumatic drive 112, where a piston rod would also be used.
- Fig. 5 the starting position, i.e. a lowered lift table 101 is shown.
- the roller 119 of the carriage 110 is located at the beginning of the guide element 109, which in this case has a special wedge-shaped design in order to be able to move the lifting table 101 with little force from the dead center position, which is only a relatively weakly dimensioned electric motor (1.5 kW). required.
- the carriage 110 is pulled along the guide element 109 via the spindle 111 until, for example, the position as shown in FIG. 6 is reached. If the motor is operating at a constant speed, the lifting table 101 is raised evenly or - if the direction of rotation is changed - lowered.
- the guide element 109 can be designed in any way in its path on which the carriage 110 runs and actually only depends on the movement of the Another example is that the guide elements 109 can be wedge-shaped in a triangular shape. However, they can also be linear or non-linear in their course.
- the essence of the invention is, therefore, that a flat design for a lifting table 101 is achieved, because the special measures according to the invention, guide element 109 and associated carriage 110, enable a weakly dimensioned (electric) drive to be selected.
- each lifting table 101 it is not necessary for each lifting table 101 to have a drive 112 when using a plurality of lifting tables 101. Rather, in such a case, the spindle 111 could, for example, be led out of the lifting table 101 and be connected via a bevel gear with a common drive which moves all the lifting tables 101 that have been set up.
- the curve serving as the guide element 109 can also be used in a conventional scissor lift table, the scissor members of which are articulated on one side in a stationary manner.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Forklifts And Lifting Vehicles (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19856206 | 1998-12-05 | ||
| DE19856206A DE19856206A1 (de) | 1998-12-05 | 1998-12-05 | Scherenhubtisch |
| PCT/DE1999/003910 WO2000034174A2 (de) | 1998-12-05 | 1999-12-06 | Scherenhubtisch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1135323A2 true EP1135323A2 (de) | 2001-09-26 |
| EP1135323B1 EP1135323B1 (de) | 2003-07-02 |
Family
ID=7890123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99966839A Expired - Lifetime EP1135323B1 (de) | 1998-12-05 | 1999-12-06 | Scherenhubtisch |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1135323B1 (de) |
| AT (1) | ATE244197T1 (de) |
| AU (1) | AU2276600A (de) |
| DE (2) | DE19856206A1 (de) |
| WO (1) | WO2000034174A2 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1018274C2 (nl) * | 2001-06-13 | 2002-12-16 | Baseline V O F | Tafel en werkwijze voor het verschaffen van een tafel. |
| WO2005044714A1 (en) * | 2003-11-07 | 2005-05-19 | Maarten Van Dalsen | Load displacer |
| ITVE20060005A1 (it) * | 2006-02-02 | 2007-08-03 | O Me R Spa | Ponte sollevatore perfezionato a pantografo.- |
| DE102010036409A1 (de) | 2010-07-15 | 2012-01-19 | Heinz-Gregor Johnen | Mobiler Personenlift |
| CN117514627B (zh) * | 2024-01-05 | 2024-03-12 | 山西寰安建设工程有限公司 | 一种风力发电装置的安装座及其安装方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE604156C (de) * | 1932-02-29 | 1934-10-15 | Henri Louis Joseph Martin | Antriebsvorrichtung fuer die gekreuzten, die Auflaufschienen tragenden Scheren einer Hebebuehne |
| BE791776A (fr) * | 1972-02-24 | 1973-03-16 | Trepel Ag | Table relevable a parallelogramme deformable |
| US4585212A (en) * | 1984-12-07 | 1986-04-29 | International Business Machines Corporation | Lift device of the scissor-jack type |
| DE4430543C2 (de) * | 1994-08-27 | 1998-07-02 | Eckhardt Dipl Ing Penzek | Hubvorrichtung |
-
1998
- 1998-12-05 DE DE19856206A patent/DE19856206A1/de not_active Ceased
-
1999
- 1999-12-06 AU AU22766/00A patent/AU2276600A/en not_active Abandoned
- 1999-12-06 WO PCT/DE1999/003910 patent/WO2000034174A2/de not_active Ceased
- 1999-12-06 EP EP99966839A patent/EP1135323B1/de not_active Expired - Lifetime
- 1999-12-06 DE DE59906212T patent/DE59906212D1/de not_active Expired - Lifetime
- 1999-12-06 AT AT99966839T patent/ATE244197T1/de not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0034174A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000034174A2 (de) | 2000-06-15 |
| WO2000034174A3 (de) | 2000-08-31 |
| ATE244197T1 (de) | 2003-07-15 |
| DE19856206A1 (de) | 2000-06-15 |
| EP1135323B1 (de) | 2003-07-02 |
| AU2276600A (en) | 2000-06-26 |
| DE59906212D1 (de) | 2003-08-07 |
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