DE202011004868U1 - Motor-operated scissor platform for stages, podiums, hall levels and grandstands - Google Patents

Abstract

The advantage of this design compared to the known designs is the following protection requirements: 1. A lifting drive for a scissor platform to build a stage, a hall level, a podium or a grandstand characterized in that the four pairs of X-scissors at the articulated points with the base and are connected to the platform and the free scissor joints are slidably mounted in the base frame and in the specially shaped frame of the platform. Each free scissor joint point is driven horizontally by a trapezoidal spindle and the free scissor joint points in the draw beam can be moved horizontally within limits by means of a slide. This enables the scissor platform to be lifted from the lower position (Fig. 2) over the pushing days and the shorter scissors. 2. A linear actuator according to claim 1 or characterized in that in addition to the four pairs of X-scissors four other but shorter scissors are articulated next to the X-scissor pairs on the frame of the platform and the free joint is slidably mounted in the base. Each ...

Description

1. Short description

The invention relates to a method for motor lifting a scissor landing for building a stage, a podium, a hall level or a tribune of similar scissor podiums, wherein the bottom side receives a fixed undercarriage drive and connects via four Scherenarmpaare the connection to the lifting platform.

Four additional pairs of scissor arms allow the platform to be lifted from the lower, flat position while replacing a separate support.

The arrangement of the pair of scissors allows their independent movement by a downforce.

State of the art

There are known scissor platforms with motor drive, which attack the scissors on the scissors guides on the platform via a spindle drive and the entire drive is raised with the platform. A detent for locking in the predetermined platform positions is required ( DE 10 2006 002 184 A1 ). The scissors are lifted by lever from the flat position. In addition to the locking of the scissors in the predetermined platform positions, the platform is supported in the lower heights by an elaborate support structure.

Other constructions consist of a fixed subframe, an X pair of scissors and the platform, the drive being housed in the subframe, performing an auxiliary stroke over a wedging plane, and then driven directly over the scissors articulation point. This design must be made very solid because the entire load is removed via a spindle or 2 and the platform in the upper positions has a large cantilever, which can lead to undesirable deformations at predetermined loads ( DE 4120 711 C1 ).

task

With regard to the previously described scissor platforms according to the prior art, the object is to develop a scissor platform, which is light and stable, which can be lifted from the flat position with the smallest possible drive, which is infinitely adjustable in height and no additional complex support structure for the lower height positions needed.

Description (Appendices, Fig. 1)

The scissor landing present here consists of a solid base ( 1 ), 4 X pairs of scissors ( 2 ), which are articulated to the subframe and the platform, and the platform ( 3 ). The four pairs of X-scissors ( 2 ) are on each overlapping hinge points with the base ( 1 ) and the platform ( 3 ) connected. The free ends of the X-pair of scissors ( 8th ) are on the one hand in the specially shaped frame profile ( 9 ) of the platform ( 3 ) and in the subframe ( 1 ) slidably mounted to perform the horizontal movement loss as possible.

The lower free ends of the X-pair of scissors ( 8th ) are also articulated with the via a spindle drive ( 4 ) driven drawbar ( 5 ) connected.

To the lifting movement of the platform ( 3 ) from the lower position with a small drive motor ( 10 ) and a gridless support 4 further shorter scissor arms ( 6 ) in addition to the previously described X-pair of scissors ( 2 ) in the platform ( 3 ) and via a push rod ( 7 ) hinged to the drawbar ( 5 ) connected.

Will the platform ( 3 ) raised from the lower position (Annexes, Figure 2 and Figure 3), the push rod ( 7 ) directly over the spindle drive ( 4 ) in the direction of additional shorter scissors ( 6 ) shifted horizontally, the scissors ( 6 ) and the platform ( 3 ) is raised.

If a sufficient height (Annexes, Figure 4) is achieved, the additional shorter shears ( 6 ) and the push rods ( 7 ) with no further function in tow with upwards moves. The further support and the drive via the long X-pair of scissors ( 2 ).

The different horizontal speed of the free hinge points of the shorter scissors ( 15 ) and the X-pair of scissors ( 8th ) is like a pusher ( 14 ) in the drawbar ( 5 ) for the free joint of the X-pair of scissors ( 8th ) out.

The drive takes place via a small drive motor ( 10 ) with two small worm gears ( 11 ) connected in the middle of the subframe ( 1 ) is housed. The opposite trapezoidal thread spindles are mutually supported on the worm gear ( 11 ), so that the spindle forces cancel each other and thus no forces in the base ( 1 ), large bearing acting in the spindle direction can be omitted.

LIST OF REFERENCE NUMBERS

1

undercarriage

2

X-scissors couples

3

platform

4

spindle drive

5

drawbar

6

shorter scissors

7

pushrod

8th

free ends of the X-pair of scissors

9

specially shaped frame profile

10

drive motor

11

worm gear

12

spindle bearings

13

connecting shaft

14

thrust piece

15

Hinge point of the shorter scissors

List of pictures:

Picture 1: Positions for description

Fig. 2: Representation of the lower position

Fig. 3: Representation of the support via the shorter scissors

Picture 4: Representation of the highest position

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006002184 A1 [0004]
• DE 4120711 C1 [0005]

Claims (1)

The advantage of this construction over the known embodiments lies in the following claims: 1. A linear actuator for a scissor landing for the construction of a stage, a hall level, a podium or a tribune characterized in that the four X-pairs of scissors at each overlapping hinge points with the base and the platform are connected and the free scissor joints are each slidably mounted in the base and in the specially shaped frame of the platform. Each free Scherengelenkpunkt is horizontally driven by a trapezoidal spindle and the free Scherengelenkpunkte are freely movable horizontally in the drawbar via a slider within limits. This will allow the scissor landing to lift from the lower position (Figure 2) via the push tabs and the shorter shears. 2. A lifting drive according to claim 1 or characterized in that in addition to the four pairs of X-scissors four more but shorter shears are articulated next to the X-pair of scissors on the frame of the platform and the free joint is slidably mounted in the base. Each additional pair of scissors is driven by the drawbar and a push rod articulated to the drawbar and scissors. 3. A lifting drive according to claims 1 and 2 or characterized in that the different horizontal speed of the free hinge points of the X-pair of scissors and the additional shorter scissors can be compensated by a slider in the drawbar. 4. A lifting drive according to claims 1 to 3, or characterized in that the additional scissors and the push rods are lifted from a height determined by the scissors length of the scissor landing in tow with upwards. 5. A lifting drive according to claims 1 to 4, or characterized in that can be dispensed with by the use of additional scissors on a complex support structure for the flat heights of the scissor landing. 6. A lifting drive according to claims 1 to 5, or characterized in that can be dispensed with by the arrangement of the additional scissors and by the use of four X-pairs of scissors on a locking of the free Scherengelenkpunkte in the platform or in the lower frame and thereby a stepless height adjustment is possible. 7. A lifting drive according to claims 1 to 6, or characterized in that no horizontal loads are introduced into the base frame by the arrangement of the scissors and the trapezoidal spindle drive, as offset by the opposing, on the worm gear supporting trapezoidal spindles, the horizontal forces. 8. A lifting drive according to claims 1 to 7, or characterized in that small drives can be used by described arrangement of scissors, which provide a low height and a lightweight design of the components. 9. A lifting drive according to claims 1 to 8, or characterized in that the frame profile of the platform is specially shaped to ensure the Scherenarmlagerung and their horizontal sliding and at the same time for receiving desired accessories for scissor platforms, such as railings and screens to be prepared. 10. A lifting drive according to claims 1 to 9, or characterized in that the possibility exists to couple individual scissor pods to a long row by the arrangement of the drive, wherein a plurality of scissor pedestals can perform mechanically synchronized lifting movements.

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