FR2837193A1 - Scissors elevator table comprises arms mounted on pivot pin and pressure spindles displaced by motors acting on arm side to cause raising or descent of table surface - Google Patents

Abstract

The elevator table comprises scissor arms (1,2) mounted on a pivot pin (3) and two pressure spindles (6,7) which are displaced by motors and act on the opposite lateral sides of the arms causing the raising or descent of the table surface (5). A reduction motor (8) provides a gyratory movement to the first pressure spindle. An anti-pivoting support (9) prevents pivoting of the reduction motor around this first pressure spindle.

Description

that it also includes printing deans.

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SCISSOR LIFT TABLE

OBJECT OF THE INVENTION

  The present invention relates to a scissor lift table, of the type comprising scissor arms mounted with the possibility of gyratory movement on a common pivot axis and being fixed by one of their ends, with the possibility of drawdown, as regards relates to the surface of the table and the base respectively, incorporating in addition two axes of thrust parallel to the axis of gyratory movement, which move horizontally in opposite directions by the action of motor means which act on the opposite side sides scissor arms thus opening or closing the scissors and raising or lowering the

table surface.

BACKGROUND TO THE INVENTIOM.

  Currently, there are elevating tables with a scissor type elevation system on which actuating means act on the scissor arms causing movement relative thereto on a common axis of movement and followed by elevation or the descent of the table surface. Usually, on these lifting tables, the actuating means include one or more spindles which are responsible for acting on the arms of

  scissors causing the lifting or lowering of the table.

  Thus, for example, in the Spanish utility model no. 9202601, a scissor lift table is described consisting of a lift device which presents a pad of rollers which move on the oblique faces of a carriage which moves under the action of a threaded pin supported on the chassis on the ground and which meshes with a net

of the cart mentions.

  Thus, in the Spanish patent n 2 102 258, coming from the European patent n O 724 540, a lifting table with a scissor type lifting system is described,

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  on which a motor acts by means of a threaded spindle acting on tilting connecting rods, which act on the scissor arms thus causing the elevation or

come down from the table.

  In the two devices mentioned above, pins are used to obtain the actuation of the scissors, but the use of pins on this type of lifting tables is an important problem since it requires high maintenance with the consequent costs. On elevating tables of the scissor type operated by means of spindles, the means responsible for acting on the scissor arms may have different configurations and arrangements, in some cases relating to connecting rods or an oblique carriage as mentioned above or else by two thrust axes, horizontal and parallel to the common axis of gyratory movement of the scissor arms, and which act by means of bearings on the opposite sides of these arms so that the thrust axes cause the table to be raised when they approach or they go away or else

  allowing its descent by its own weight.

DESCRIPTION OF THE INVENTION.

  The scissor lift table, object of the present invention, of the type comprising those of a base or a lower platform and an upper surface linked by means of a scissor mechanism, scissor arms mounted with possibility of gyratory movement on an axis common pivot and two axes of thrust parallel to the pivot axis and which move horizontally in opposite directions by the action of motor means, acting on the opposite sides opposite the scissor arms in order to cause the lifting or lowering of the surface of the table, presents constructive peculiarities oriented to eliminate the use of threaded pins in order to significantly reduce repair spots and

  maintenance of the lifting table.

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  According to the invention, the motor means used for raising and lowering the scissor lift table, object of the invention comprise: - a gear motor mounted on a first axis of thrust of the scissor arms communicating therewith a

gyratory movement.

  - a gyratory anti-pivot support which prevents the gear motor from pivoting around the first thrust axis, - belts being fixed, by one of their ends, to the anti-pivot support and by their opposite end, at the periphery of the first axis of thrust surrounding these belts with its intermediate zone the second thrust axis, so that when the first thrust axis is pivoted by the action of the gear motor, the rolling or unwinding of the belts is obtained thereon and the approximation or the distance relative to this first and second axis of thrust with the consecutive elevation or the descent of the

table surface.

  The actuation of the thrust axes by means of belts makes it possible to eliminate the use of the spindles usually used for this purpose, while reducing the

  maintenance and repair costs.

  According to the invention, the anti-pivot support is fixed, by one of its ends, to the geared motor and mounts with the possibility of longitudinal displacement on one or more guide pieces associated with the thrust axes.

scissor arms.

  To simplify the transmission of movement from the geared motor to the first axis of thrust, it is provided that this geared motor has a vice output axis on which is mounted, without possibility of gyratory movement, the first axis of thrust, the geared motor thus transmitting its gyratory movement directly has

this first axis of thrust.

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DESCRIPTION OF THE FIGURES.

  In order to complete this description and in the

  purpose of facilitating the understanding of the characteristics of the invention, this description is accompanied by a set of drawings in which the wind represents, for illustrative and nonlimiting purposes, the following elements: - Figure 1 shows an elevation of the

  scissor lift table, object of the invention.

  - Figure 2 shows a we from above in partial section of the scissor lift table, - Figure 3 shows a schematic detail elevation view of the mounting of the belts on the first

  and second thrust axes and the support of the gearmotor.

  PREFERRED EMBODIMENT OF THE INVENTION.

  As can be seen in the drawings of all the figures, this lifting table includes scissor arms 1 and 2 which, mounted on a common axis of gyratory movement 3, are mounted with the possibility of articulation at the base of the platform 4 and on the surface of the table 5, while their opposite ends are mounted with the possibility of displacement all along the table 5 and the base of the

platform 4.

  On the opposite sides of the scissor arms 1 and 2 act first and second thrust axes 6 and 7 parallel to the common axis 3 of the gyratory movement of the scissor arms 1 and 2. On the thrust axis 6 are finds a motoreducer 8 mounted which communicates to it a gyratory movement in one or the other direction to obtain lt elevation or the descent of the surface 5 of the table. The geared motor 8 has a vice exit axis on which the first thrust axis 6 is located, to give the latter directly the gyratory movement of

geared motor 8.

  To prevent the pivoting movement of the geared motor 8 around the axis 6, it is provided that the

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  lifting table has an anti-pivot support reference

9 as a whole.

  To obtain the lifting and lowering of the table, the lifting table has belts 10 fixed at one of their ends to the first thrust axis 6 and at their ends opposite to the anti-pivot support 9, surrounding

  the second thrust axis 7 in their intermediate zone.

  When the geared motor 8 pivots in a determined direction, the belts 10 are wound on the first thrust axis 6 which brings the second closer together.

  thrust axis 7 followed by the elevation of the table 5.

  When the geared motor 8 pivots in the opposite direction of the belts 10, these unfold from the first thrust axis 6 distancing from the second thrust axis 7 under

  the effect of the table's own weight (5).

  The invention having just been described above as well as an example of embodiment, it goes without saying that the materials, shapes, sizes and arrangements of the elements described can be modified without these assuming an alteration of the essential characteristics.

of the invention.

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REYENDICATIONS

  1. Scissor lift table of the type comprising: - scissor arms (1, 2) mounted with possibility of gyratory movement on a common pivot axis (3), wind mounted with possibility of articulation at the base of the platform (4) and on the surface of the table (5), while their opposite ends are mounted with the possibility of displacement all along the table (5) and of the base of the platform (4) respectively, - two thrust axes (6, 7) parallel to the axis of the pivot (3) and which move horizontally in opposite directions by the action of motor means and which act on the opposite lateral dimensions of the scissor arms (1, 2) causing the surface of the surface to rise or fall

table (5),

  characterized by the fact that the above-mentioned motor means comprise: - a geared motor (8) mounted on a first thrust axis (6) of the scissor arms (1, 2) and which communicates a movement to this first thrust axis (6) gyratory, - an anti-pivot support (9) which prevents the pivoting of the geared motor (8) around the first thrust axis (6), _ belts (10) fixed fixed fixed at one of their ends to the first thrust axis (6 ) and at their ends opposite the anti-pivot support (9), surrounding the second thrust axis (7) in their intermediate zone, so that the first thrust axis (6) ensures the rolling or unwinding of the belts (10) on itself and the approximation or relative distance of these first and second axes of thrust (6, 7) followed by ['elevation or descent of the surface (5) of the

table.

  2. lifting table according to claim 1, characterized in that the geared motor (8) has

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  of a vice output axis on which is mounted without possibility of pivot, the first thrust axis (6), so that the geared motor (8) transmits the movement

  roundabout directly to this first axis of thrust (6).