Scissor lift table and method for changing a fixed bearing of a scissor lift table

Abstract

A scissor lift table (1) has a first base element (2) and a second base element (3) and a scissor (4). The scissor (4) has a first scissor part (6) and a second scissor part (7), wherein the first scissor part (6) and the second scissor part (7) are pivotable relative to one another about a scissor axis (5). The first base element (2) and the second base element (3) are connected by the scissor (4) such that a pivoting of the scissor parts (6, 7) relative to one another about the scissor axis (5) causes a change in the distance between the first base element (2) and the second base element (3), wherein the first scissor part (6) is pivotably borne on the first base element (2) using a fixed bearing (10) and the second scissor part (7) is displaceably and pivotably borne on the first base element (2) using a floating bearing (11). The scissor lift table (1) is designed such the first scissor part (6) may be pivotably fixed relative to the first base element (2) about a temporary pivot axis (12) and a mechanical connection (14) between fixed bearing (10) and first base element (2) may be disconnected and the position of the pivot axis is selected such that when the first scissor part (6) is fixed and the mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and second base element (3) causes an increase in the distance between the first base element (2) and the fixed bearing (10).

Claims

1. A scissor lift table (1), comprising a first base element (2) and a second base element (3) and a scissor (4), wherein the scissor (4) has a first scissor part (6) and a second scissor part (7), wherein the first scissor part (6) and the second scissor part (7) are pivotable relative to one another about a scissor axis (5), wherein the first base element (2) and the second base element (3) are connected by the scissor (4) such that a pivoting of the scissor parts (6, 7) relative to one another about the scissor axis (5) causes a change in the distance between the first base element (2) and the second base element (3), wherein the first scissor part (6) is pivotably borne on the first base element (2) using a fixed bearing (10) and the second scissor part (7) is displaceably and pivotably borne on the first base element (2) using a floating bearing (11), further comprising: a temporary pivot axis (12) about which the first scissor part (6) is pivotably fixable relative to the first base element (2); a fixing device (13) for pivotably fixing the temporary pivot axis (12) relative to the first base element (2); and a disconnectable mechanical connection (14) between the fixed bearing (10) and the first base element (2), wherein the position of the temporary pivot axis (12) is selected such that when the first scissor part (6) is fixed and the disconnectable mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and the second base element (3) causes an increase in the distance between the first base element (2) and the fixed bearing (10).

2. The scissor lift table (1) according to claim 1, wherein the first base element (2) is located below the second base element (3).

3. The scissor lift table (1) according to claim 1, wherein the second scissor part (7) is pivotably borne on the second base element (3) using another fixed bearing and the first scissor part (6) is displaceably and pivotably borne on the second base element using another floating bearing, further comprising: another temporary pivot axis about which the second scissor part (7) is pivotably fixed relative to the second base element (3); another fixing device for pivotably fixing the another temporary pivot axis relative to the second base element (3); and another disconnectable mechanical connection between the other fixed bearing and the second base element (3), wherein the position of the another temporary pivot axis is selected such that when the second scissor part (7) is fixed and the another mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and the second base element (3) causes an increase in the distance between the second base element (3) and the another fixed bearing.

4. The scissor lift table (1) according to claim 3, wherein the temporary pivot axis (12) is located between the fixed bearing (10) and the scissor axis (5), proximal to the first scissor part (6), and the another temporary pivot axis (12) is located between the another fixed bearing (10) and the scissor axis, proximal to the second scissor part (7).

5. The scissor lift table (1) according to claim 1, wherein the temporary pivot axis (12) is located between the fixed bearing (10) and the scissor axis (5), proximal to the first scissor part (6).

6. A scissor lift table system comprising a scissor lift table (1) and a fixing device (13) for temporarily fixing at least one of a first scissor part (6) and a second scissor part (7), wherein the scissor lift table (1) comprises a first base element (2) and a second base element (3) and a scissor (4), wherein the scissor (4) has a first scissor part (6) and a second scissor part (7), wherein the first scissor part (6) and the second scissor part (7) are pivotable relative to one another about a scissor axis (5), wherein the first base element (2) and the second base element (3) are connected by the scissor (4) such that a pivoting of the scissor parts (6, 7) relative to one another about the scissor axis (5) causes a change in the distance between the first base element (2) and the second base element (3), wherein the first scissor part (6) is pivotably borne on the first base element (2) using a fixed bearing (10) and the second scissor part (7) is displaceably and pivotably borne on the first base element (2) using a floating bearing (11), the scissor lift table ((1) further comprising: a temporary pivot axis (12) about which the first scissor part (6) is pivotably fixable relative to the first base element (2); a fixing device (13) for pivotably fixing the temporary pivot axis (12) relative to the first base element (2); and a disconnectable mechanical connection (14) between the fixed bearing (10) and the first base element (2), wherein the position of the temporary pivot axis (12) is selected such that when the first scissor part (6) is fixed and the disconnectable mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and the second base element (3) causes an increase in the distance between the first base element (2) and the fixed bearing (10).

7. The scissor lift table system according to claim 6, wherein the fixing device (13) has an axis for connecting with at least one of the first scissor part (6) and the second scissor part (7).

8. The scissor lift table system according to claim 7, wherein the fixing device (13) has an axis support for connecting with at least one of the first base element (2) and the second base element (3).

9. The scissor lift table system according to claim 6, wherein the fixing device (13) has an axis support for connecting with at least one of the first base element (2) and the second base element (3).

10. The scissor lift table system according to claim 6, wherein the second scissor part (7) is pivotably borne on the second base element (3) using another fixed bearing and the first scissor part (6) is displaceably and pivotably borne on the second base element using another floating bearing, wherein the scissor lift table (1) further comprises: another temporary pivot axis about which the second scissor part (7) is pivotably fixed relative to the second base element (3); another fixing device for pivotably fixing the another temporary pivot axis relative to the second base element (3); and another disconnectable mechanical connection between the other fixed bearing and the second base element (3), wherein the position of the another temporary pivot axis is selected such that when the second scissor part (7) is fixed and the another mechanical connection (14) is disconnected, reducing the distance between the first base element (2) and the second base element (3) causes an increase in the distance between the second base element (3) and the another fixed bearing.

11. A method for changing a fixed bearing (10) of a scissor lift table (1), wherein the scissor lift table (1) comprises a first base element (2) and a second base element (3) and a scissor (4), wherein the scissor (4) has a first scissor part (6) and a second scissor part (7), wherein the first scissor part (6) and the second scissor part (7) are pivotable relative to one another about a scissor axis (5), wherein the first base element (2) and the second base element (3) are connected using the scissor (4) such that pivoting the scissor parts (6, 7) relative to one another about the scissor axis (5) causes a change in the distance between the first base element (2) and the second base element (3), wherein the first scissor part (6) is pivotably borne on the first base element (2) using a fixed bearing (10) and the second scissor part (7) is displaceably and pivotably borne on the first base element (2) using a floating bearing (11), comprising the steps of: a) pivotably fixing the first scissor part (6) relative to the first base element (2) about a temporary pivot axis (12) fixed to a fixing device (13), wherein the position of the temporary pivot axis (12) is selected such that reducing the distance between the first base element (2) and second base element (3) may cause an increase in the distance between the first base element (2) and the fixed bearing (10); b) disconnecting a mechanical connection (14) between the fixed bearing (10) and the first base element (2); and c) reducing the distance between the first base element (2) and the second base element (3).

12. The method according to claim 11, wherein the distance between the first base element (2) and the second base element (3) is reduced using a drive (9) for lifting and/or lowering the scissor lift table (1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention shall be described in greater detail in the following using FIGS. 1 through 5.

(2) FIG. 1 is a perspective elevation of an exemplary inventive lift table;

(3) FIG. 2 is a perspective elevation of an exemplary inventive lift table system having a lift table and a fixing device attached thereto;

(4) FIG. 3 depicts the lift table system illustrated in FIG. 2 having fixed bearings moved away from the base element; and

(5) FIGS. 4 and 5 are each simplified sectional depictions of the scissor table system illustrated in FIGS. 2 and 3.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(6) The exemplary inventive lift table depicted in FIG. 1 has a first base element 2 and a second base element 3 that are connected by a scissor 4. The scissor 4 has a first scissor part 6 and a second scissor part 7 that are connected by a pivot axis 5. In the example shown, each scissor part is essentially made of two scissor blades and transverse connecting elements for connecting the scissor blades.

(7) For lifting and lowering the lift table, the exemplary inventive lift table has a drive 8 that acts on the scissor 4 via a tensioning means 9, the latter in the example shown being embodied as an arrangement of belt straps that may be wound on a shaft.

(8) The first scissor part 6 is attached to the first base element 2 with fixed bearings 10. The second scissor part 3 is attached to the first base element 2 with floating bearings 11.

(9) To make it possible to change the floating bearing, the first scissor part 6 may be pivotably fixed relative to the first base element 2 about a temporary pivot axis 12. For this, the exemplary inventive lift table system has a fixing device 13, which is a fixing device for the temporary pivot axis 12, which fixing device may be attached to the first base element 2. If the fixing device 13 is attached to the first base element 2, for instance if it is connected with the first base element 2 using a screw connection, the temporary pivot axis 12 can support the load that the first scissor part 6 normally introduces to the fixed bearings 10 and thus can unload the fixed bearings 10. A mechanical connection 14 that may be realized, for instance, by screws, and which in the exemplary lift table connects the fixed bearings 10 with the first base element 2, may now be disconnected without causing instability in the scissor lift table 1.

(10) If, for instance, the lift table 1 is now lowered using the drive 8, i.e., the distance between the first base element 2 and the second base element 3 is caused due to the scissor parts 6 and 7 pivoting relative to one another about the scissor axis 5, the first scissor part 6 pivots relative to the first base element 2 about the temporary pivot axis 12.

(11) In the example illustrated, the temporary pivot axis 12 is advantageously arranged between the scissor axis 5 and the fixed bearing 10. Thus, when the lift table is lowered, the pivoting of the first scissor part 6 about the temporary pivot axis 12 causes the fixed bearing 10 to move away from the base element 2, as is schematically depicted in FIGS. 3 and 5. The fixed bearings are now unloaded and moved into an easily accessible position so that a simple exchange may take place.

(12) Analogously, a fixing device 13 may also be attached to the second base element 3 in order, via another temporary pivot axis (not shown), to pivotably fix the second scissor part 7 relative to the second base element about the other temporary pivot axis 3.

(13) Then, analogous to the example described in the foregoing, the fixed bearings, which connect the second scissor part 7 with the second base element 3, may be changed.

REFERENCE LIST

(14) 1Scissor lift table 2First base part 3Second base part 4Scissor 5Scissor axis 6First scissor part 7Second scissor part 8Drive 9Tensioning means 10Fixed bearing 11Floating bearing 12Temporary pivot axis 13Fixing device 14Mechanical connection