Working station with a lifting mechanism for a packaging machine

Patent metadata

Field	Value
Publication number	US-11524809-B2
Application number	US-201816755477-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Oct 12, 2017
Publication date	Dec 13, 2022
Grant date	Dec 13, 2022

Abstract

The invention relates to a working station, in particular to a deep-drawing station, to a molding station, to a sealing station, to a cutting station or to a punching station, for a packaging machine, comprising a rack supported on the ground; a work unit comprising an upper part and a lower part; and a lifting mechanism which is carried by the rack and by which the lower part of the work unit can be raised and lowered relative to the rack to perform a lower stroke, wherein the lifting mechanism has a drive that comprises at least one shaft extending in a transverse direction; a drive motor engaging at the shaft for rotating the shaft; and at least one gear which is coupled at an input side to the shaft, at which the lower part is supported at an output side, and which converts a rotation of the shaft into the lower stroke of the lower part.

First claim

The invention claimed is:

1. A working station for a packaging machine, comprising
a rack supported on the ground;
a work unit comprising an upper part and a lower part; and
a lifting mechanism which is carried by the rack and by which the lower part of the work unit can be raised and lowered relative to the rack to perform a lower stroke,
wherein the lifting mechanism has a drive that comprises at least one shaft extending in a transverse direction; a drive motor engaging at the shaft for rotating the shaft; and at least one gear which is coupled at an input side to the shaft, at which the lower part is supported at an output side, and which converts a rotation of the shaft into the lower stroke of the lower part; wherein the shaft is carried by the rack at a first axial position of the shaft wherein the shaft carries a base at a second axial position of the shaft, the second axial position being offset from the first axial position along the extension of the shaft in the transverse direction; and wherein the base carries the upper part.

2. A working station in accordance with claim 1 , wherein the base comprises a frame.

3. A working station in accordance with claim 1 , wherein the gear is configured as a coupling gear.

4. A working station in accordance with claim 3 , wherein the coupling gear is configured as a slider crank gear or as a centric slider crank gear.

5. A working station in accordance with claim 1 , wherein the gear comprises a toggle lever arrangement.

6. A working station in accordance with claim 5 , wherein the toggle lever arrangement is stretched in a position with the lower part raised to the maximum.

7. A working station in accordance with claim 1 , wherein the gear comprises at least one pair of congruent and mutually spaced apart connecting rods between which a shaft crank rotationally fixedly connected to the shaft is connected in an articulated manner at the input side and the lower part or a support for the lower part is connected in an articulated manner at the output side.

8. A working station in accordance with claim 1 , wherein the shaft is rotatably supported in longitudinal supports of the base that are spaced apart from one another in the transverse direction.

9. A working station in accordance with claim 1 , wherein the gear comprises at least two individual gears that are spaced apart along the shaft and that are synchronized by means of the shaft for a joint performance of the lower stroke of the lower part.

10. A working station in accordance with claim 1 , wherein the lifting mechanism comprises a plurality of synchronized shafts that are spaced apart along the rack and that each have a gear for the joint performance of the lower stroke of the lower part.

11. A working station in accordance with claim 1 , wherein, during the lower stroke of the lower part, the lower part is guided at the base, at the upper part, or at a column supporting the upper part at the base.

12. A working station in accordance with claim 1 , wherein the upper part is vertically adjustably supported at the base.

13. A working station in accordance with claim 1 , wherein the upper part is supported at the base via a plurality of columns.

14. A working station in accordance with claim 1 , wherein the drive motor engages at the shaft via a coupling gear.

15. A working station in accordance with claim 14 , wherein, in a position with the lower part lowered to the maximum, the torque applied to a drive shaft of the drive motor via the coupling gear is zero or approximately zero.

16. A working station in accordance with claim 14 , wherein the coupling gear is configured as a four-bar linkage that comprises a drive shaft of the drive motor; a motor crank connected to the drive shaft; a drive coupling connected in an articulated manner to the motor crank; and a shaft crank rotationally fixedly connected to the shaft and connected in an articulated manner to the drive coupling.

17. A working station in accordance with claim 16 , wherein, in a position with the lower part lowered to the maximum the axis of rotation of the drive shaft of the drive motor, the articulated axis between the motor crank and the drive coupling, and the articulated axis between the drive coupling and the shaft crank lie at least approximately in one plane.

18. A working station in accordance with claim 1 , wherein the base can be lowered and raised relative to the rack to perform an upper stroke of the upper part.

19. A working station in accordance with claim 18 , wherein the lower stroke of the lower part and the upper stroke of the upper part are positively coupled to one another.

20. A working station in accordance with claim 18 , wherein the upper stroke of the upper part and the lower stroke of the lower part extend in opposite senses to one another.

21. A working station in accordance with claim 1 , wherein the lifting mechanism is adjustable relative to the rack in a longitudinal direction.

22. A working station in accordance with claim 1 , wherein the lifting mechanism is supported via a plurality of support members at the rack and is adjustable relative to the rack in the longitudinal direction by means of the support members.

23. A working station in accordance with claim 1 , wherein the rack has at least two support sections which extend spaced apart in parallel in the longitudinal direction, at which the lifting mechanism is supported, and along which the lifting mechanism is adjustable relative to the rack.

24. A working station in accordance with claim 1 , wherein a fixing device is provided by means of which the position of the lifting mechanism in the longitudinal direction can be fixed at the rack.

25. A working station in accordance with claim 24 , wherein the fixing device comprises a spindle drive for setting the longitudinal position of the lifting mechanism.

26. A working station in accordance with claim 25 , wherein the spindle drive comprises a spindle attached to the rack; and a spindle nut, with the spindle nut preventing a movement of the lifting mechanism relative to the rack in the longitudinal direction and allowing said movement in a lift direction.

27. A working station in accordance with claim 1 , wherein the working station is one of a deep-drawing station, a molding station, a sealing station, a cutting station or a punching station.

Assignees

• Weber Maschb Gmbh

Inventors

• Mayer Josef

Classifications

• B65B65/02 Primary

  Driving gear · CPC title

• B65B51/14

  by reciprocating or oscillating members (B65B51/148 takes precedence) · CPC title

• B65B65/00

  Details peculiar to packaging machines and not otherwise provided for; Arrangements of such details · CPC title

• B65B61/06

  by cutting · CPC title

• B65B9/04

  one or both webs being formed with pockets for the reception of the articles, or of the quantities of material · CPC title