DE1245076B - Lift table with Nuernberger scissors - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

B66f

German class: 35 d-6

Number: 1245 076

File number: A 42821XI / 35 d

Filing date: April 4, 1963

Opened on: July 20, 1967

The invention relates to a lifting table with Nuremberg scissors, in which one is used to lift the table top between this and the table leg arranged toggle lever is used, which by means of a one hand on the table leg and on the other hand, the lifting cylinder acting on the upper arm of the toggle lever is actuated. Such lifting tables are used in particular for bringing in or removing material from machine tools used.

The well-known lifting tables equipped with Nuremberg scissors and toggle levers operated by lifting cylinders have the disadvantage that the toggle joint arms are hinged on one side to the table base and table top are, which means that the Nürnberger Scissors have to absorb the load as much as possible. This has the consequence that the lever of the Nuremberg Scissors must be designed to be relatively strong and heavy.

In the known lifting tables, where the lifting force is concentric or symmetrical on both sides attacks on the table top, there is the disadvantage that it is like an accordion due to its training collapsible pressure vessel, telescopically telescopic cylinder members, parallel Do not fold guided scissors or hinged rods enough or when in use several lifting devices are very expensive.

In addition, it has been shown that when using pulling lifting cylinders, a better lifting efficiency than can be achieved with pushing lifting cylinders, creating optimal conditions are given for lifting from the collapsed rest position.

This is where the invention comes in and proposes a lifting table with Nuremberg scissors, one for lifting the table top between this and the table base arranged toggle lever and one on the one hand on the table base and on the other hand, the lifting cylinder acting on the upper arm of the toggle lever, which is characterized by that the piston rod of the pulling lifting cylinder at a point above the knee joint engages protruding angled end of the upper articulated arm and that the free ends of the Toggle joint arms in the middle between the front sides, vertically one above the other, on the table base or on the table top are hinged.

The knee joint point is advantageously located approximately on one in every position of the table top Vertical between the ends of the levers that can slide on the table base and on the table top Nuremberg scissors. The lifting cylinder is preferably a lifting table with Nuremberg scissors

Applicant:

American Manufacturing Company, Inc.,

Tacoma, Wash. (V. St. A.)

Representative:

W. Schönherr, patent attorney,

Trier, Christophstr. 23

also attached roughly in the middle between the two front edges on the table base.

Further details of the invention are shown in the exemplary drawings of a preferred embodiment recognizable.

F i g. 1 is a side view of a lift table in the extended position;

F i g. 2 is a side view of the lift table of FIG. 1 in middle position;

F i g. 3 is a side view of the lift table of FIG. 1 in the folded position.

The lifting table consists of a table base 1, 2, a table top 9, a Nuremberg connecting both parts Scissors 10, 14, a toggle lever 37, 38 and a pulling lifting cylinder 41.

The table base is formed from two parallel beams 1 and two cross beams 2, which are welded Od. Like. Are connected to a frame. On the inside of the side members 1 are each other opposite guide grooves in which the Nuremberg scissors are mounted at the lower end of the lever 14 Rollers 17 are running.

Corresponding to the supports 1 of the table base, U-rails open inwards are under the table top 9 13 attached, in which at the top of the lever

10 rollers 12 of the Nuremberg scissors are running. Furthermore, short legs 19 can be used on the table top Support of the table top can be arranged in the folded state.

The lower end of the lever 10 is supported by a pivot pin or shaft mounted in the longitudinal member 1

11 held, while the upper end of the lever 14 by a pivot pin mounted on the table top 9 or shaft 15 is held. In the middle the two levers 10.14 of the Nuremberg scissors are through Pivot pin 18 connected to one another.

Serving to raise the table top 9 toggle lever consists of a lower articulated arm 37, the lower end by a pivot pin or shaft 6

709 617/87

Claims (3)

is held on the table base, and an upper articulated arm 38, the upper end of which is held by a hinge pin or shaft 8 on the table top. The articulation points 6.8 of the lower end of the lower articulated arm 37 and the upper end of the upper articulated arm 38 are located vertically one above the other and in the middle between the end faces of the table base and table top. The two articulated arms 37 and 38 are articulated to one another by means of pivot pins or shafts 40. The articulated arms of the toggle lever and the lever of the Nuremberg scissors should be coordinated in such a way that the knee joint point 40 in every position of the table top 9 is approximately on a vertical line between the ends of the levers 10, 14 of the Nuremberg that can be displaced on the table base 1 and on the table top 9 Scissors is located. The upper articulated arm 38 is extended downward beyond the knee articulation point 40 and this end 39 is angled relative to the articulated arm 38. The piston rod of the lifting cylinder 41 with a pulling action engages the angled end 39. The lifting cylinder is advantageously articulated by means of bolts or shaft 43 approximately in the middle between the front edges on the table base and the piston rod is connected to the angled end 39 of articulated arm 38 by means of bolts or shaft 42. It is also possible to place the pivot point 6 for the lower end of the lower articulated arm 37 and the pivot point 43 for the lifting cylinder on one axis. The drive motor is denoted by 22 and the reserve container for the hydraulic fluid is denoted by 24. Both, like the pump (not shown) and the supply and discharge lines, are arranged between the table base and the table top. If the lifting table is to be brought from the collapsed rest position (FIG. 3) via the middle position (FIG. 2) to the extended position (FIG. 1), the piston rod of the pressure cylinder 41 pulls itself in the articulated arm 38, 39 rotates about the articulation point 40 and the articulation point 8 and the table top 9 is thereby raised. First of all, the pulling direction of the piston rod runs approximately parallel to the upper articulated arm 38, which means that a large amount of force is applied. On the other hand, in this position the height of lift is greatest in relation to the length of the pull, so that the greatest possible application of force is required for this. As the table height increases, the application of force decreases progressively, but so does the effectiveness of the lifting cylinder. In this way, a particularly good lifting effect, which is important in practice, is achieved precisely in the area in which an effective attack is important. The fact that the two articulated arms 38,39 engage in the middle gives a great stability in connection with the Nuremberg scissors 10.14, which proves to be particularly advantageous when the table top is loaded on one side. In addition, the lifting table can be extended and collapsed and raised or lowered faster than was the case with the previously known lifting tables. Patent claims: 1. Lifting table with Nuremberg scissors, with which to lift the table top between them and the table leg arranged toggle lever is used, which by means of a one hand on the table leg and on the other hand, attacking the upper arm of the toggle lever Lift cylinder is operated, thereby characterized in that the piston rod of the pulling lifting cylinder (41) on one angled end (39) of the upper articulated arm protruding beyond the knee joint point (40) (38) engages and that the free ends of the toggle joint arms (37, 38) in the middle hinged between the front sides, vertically one above the other, on the table base (1) or on the table top (9) are. 2. Lifting table according to claim 1, characterized in that the knee joint point (40) is in every position of the table top (9) approximately on a vertical line between the table base (1) and on the table top (9) displaceable ends of the levers (10, 14) of the Nuremberg scissors is located. 3. Lifting table according to claims 1 and 2, characterized in that the lifting cylinder (41) is also attached to the table base (1) approximately in the middle between the two front edges. Considered publications:
German utility model No. 1812 801,
776; French patent specification No. 502136,
1160418; U.S. Patent Nos. 1,095,391, 2,610,824;
Brochure “Sherpa Mechanical Handling Equipment Lifting Tables” from Salisbury Precision Engineering, Ltd., Heston Airport, Hounslow, Middlesex. For this purpose one sheet of drawings 709 617/87 7.67 © Bundesdruckerei Berlin