Litho laminating machine

Abstract

The invention relates to a litho laminating machine (10) having a frame (18), an accelerator table (20) mounted to the frame (18) so as to be pivotable around a pivot axis (P), a plurality of accelerator rollers (24) mounted on the table (20), and a motor (42) for driving the accelerator rollers (24), characterized in that the motor (42) is mounted to the frame (18), with a rotatable transmission element (30, 36) being mounted so as to have an axis of rotation which coincides with the pivot axis (P), both the motor (42) and the accelerator rollers (24) being connected to the transmission element (30, 36).

Claims

1. A litho laminating machine comprising: a frame; an accelerator table mounted to the frame so as to be pivotable around a pivot axis; a plurality of accelerator rollers mounted on the accelerator table; a motor configured to drive the plurality of accelerator rollers, the motor being mounted to the frame; and a rotatable transmission element mounted so as to have an axis of rotation which coincides with the pivot axis, wherein both the motor and the plurality of accelerator rollers are connected to the rotatable transmission element.

2. The litho laminating machine of claim 1, wherein the rotatable transmission element comprises a drive pulley, and the plurality of accelerator rollers are connected to the drive pulley by means of a belt drive.

3. The litho laminating machine of claim 2, wherein the belt drive is a carbon belt.

4. The litho laminating machine of claim 2, wherein the belt drive is a toothed belt.

5. The litho laminating machine of claim 2, further comprising at least one tension roller.

6. The litho laminating machine of claim 2, further comprising at least one intermediate pulley.

7. The litho laminating machine of claim 2, wherein the rotatable transmission element comprises a driven pulley, and the motor is connected to the driven pulley by means of a belt engaging at a motor pulley.

8. The litho laminating machine of claim 7, wherein a diameter of the motor pulley is larger than a diameter of the driven pulley.

9. The litho laminating machine of claim 1, wherein the motor is an electric motor.

10. The litho laminating machine of claim 1, further comprising a lifting mechanism configured to lift the accelerator table from an operating position to a maintenance position.

Description

(1) The invention will now be described with reference to the enclosed drawings. In the drawings,

(2) FIG. 1 shows in a perspective view a part of a litho laminating machine having an accelerator table;

(3) FIG. 2 shows in a side view the table of the machine of FIG. 1 in an operating position; and

(4) FIG. 3 shows in a perspective view the table of the machine of FIG. 1 in a raised maintenance position.

(5) FIG. 1 shows the upstream portion of a litho laminating machine 10. It has a supply 12 for printed sheets, and a schematically shown unwinding mechanism 14 for corrugated board. The printed sheets are applied onto the corrugated board and are pressed onto the corrugated board in a laminating device 16. Further components which are arranged downstream at machine 10 are not shown.

(6) Machine 10 comprises a frame 18 to which an accelerator table 20 is pivotally mounted (please see also FIG. 2). Table 20 is mounted to frame 18 so as to be pivotable around a pivot axis P. A schematically shown lifting mechanism 22 is provided for lifting accelerator table 20 from the operating position shown in FIG. 2 towards a raised maintenance position shown in FIG. 3.

(7) At the end which is opposite to pivot axis P, accelerator rollers 24 (of which only their drive axis is visible here) are provided which are used for advancing the individual printed sheets with the desired speed onto the corrugated board. The accelerator rollers 24 are driven with a belt drive comprising a pulley 26 associated with accelerator rollers 24, intermediate pulleys 28, and a drive pulley 30. The axis of rotation of drive pulley 30 coincides with pivot axis P.

(8) Between drive pulley 30 and accelerator pulley 26, two belts 32 are used which here are toothed belts comprising carbon fibres. Tension rollers 34 are provided which allow controlling the tension within the drive belts.

(9) A driven pulley 36 is mounted to drive pulley 30 so as to rotate together therewith as a unit. Driven pulley 36 is engaged by a pulley toothed belt 38 which in turn is received on a motor pulley 40. Motor pulley 40 is driven by a motor 42 which here is an electric motor.

(10) Motor pulley 40 here has a diameter which is larger than the diameter of the driven pulley. Accordingly, an increased couple is formed from motor 42 towards accelerator rollers 24.

(11) With the belt drives, a rotation of motor pulley 40 can be transmitted towards accelerator rollers 24, with the thus formed drive train having a low inertia so that the speed of the accelerator rollers can be changed very quickly. As the axis of rotation of driven pulley 36 and drive pulley 30 coincides with pivot axis P, moving accelerator table 20 from the operating position towards the maintenance position has no effect on the transmission from motor 42 towards accelerator rollers 24. Further, an accelerator table 20 is achieved which has a low weight as the motor is mounted to frame 18.