Platform for pallet wrapping machines

Abstract

A platform for pallet wrapping machines includes a fixed base resting on the ground and a turntable which rotates relative to the base and in which a plurality of rollers is integrated, the rollers projecting from it in such a way as to support a pallet and provided with a movement device integrated with them, in such a way that the platform has a total thickness not greater than 10 centimeters.

Claims

1. A platform for pallet wrapping machines, comprising: a fixed base resting on a ground; and a turntable which rotates relative to the fixed base; a plurality of rollers integrated with the turntable and projecting from the turntable to support a pallet; and a movement device for the rollers which is integrated with the rollers such that the platform has a total thickness not greater than 10 centimeters.

2. The platform according to claim 1, wherein the movement device comprises: at least one motor positioned at least partly in one of the rollers; and a motion transmission device configured for connecting certain ones of the rollers to each other.

3. The platform according to claim 2, wherein the motion transmission device comprises gear wheels fixed to the certain ones of the rollers and at least one belt shaped to match the gear wheels.

4. The platform according to claim 3, wherein the at least one belt comprises a plurality of belts, suitable for connecting pairs of gear wheels of adjacent ones of the certain ones of the rollers.

5. The platform according to claim 4, wherein the at least one motor includes two motors and the movement device comprises the two motors at least partly positioned inside two of the certain ones of the rollers, to form two sets of autonomously moved rollers.

6. The platform according to claim 5, and further comprising a power device for the movement device.

7. The platform according to claim 6, wherein the power device comprises an electricity dispenser, conducting cables housed in a duct fixed to the fixed base and leading to a slip ring connected to the two motors at least partly positioned inside the two of the certain ones of the rollers.

8. The platform according to claim 2, wherein the at least one motor includes two motors and the movement device comprises the two motors at least partly positioned inside two of the certain ones of the rollers, to form two sets of autonomously moved rollers.

9. The platform according to claim 1, and further comprising a retaining device for a flap of a plastic film configured for wrapping the pallet.

10. The platform according to claim 9, wherein the retaining device comprises a gripper for clamping the plastic film, and a control device configured for controlling for the gripper.

11. The platform according to claim 10, wherein the control device comprises an electronic control unit which controls a compressed air device.

12. The platform according to claim 11, wherein the compressed air device comprises a dispenser of compressed air, a duct fixed to the fixed base leading to a rotary joint fixed to the turntable, and a pair of pistons connected to the rotary joint by cables, which are suitable for making the gripper pass from a closed position, in which the gripper clamps the film at a start of wrapping, to an open position, and vice versa.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further advantages and features of the invention will be more apparent in the detailed description which follows, with reference to the accompanying drawings, which show an example, non-limiting embodiment, in which:

(2) FIG. 1 is a perspective assembly view of the invention;

(3) FIG. 2 is an exploded view of the invention;

(4) FIG. 3 is an exploded detail of the invention;

(5) FIG. 4 shows a perspective bottom view (4a) and top view (4b) of another detail of the invention;

(6) FIG. 5 is an enlarged view of the detail of FIG. 4a;

(7) FIG. 6 is a partial top plan view of the invention, with some parts cut away to better illustrate others;

(8) FIG. 7 shows the invention according to the cross-section VII-VII of FIG. 6;

(9) FIG. 8 is an enlarged detail from FIG. 7;

(10) FIG. 9 is a perspective enlarged view of a longitudinal section of the invention;

(11) FIG. 10 is a perspective view of a further detail of the invention, with some parts cut away to better illustrate others.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

(12) As can be seen from the figures, the invention relates to a platform for pallet wrapping machines, comprising a fixed base 1 resting on the ground and a turntable 2 which rotates relative to the base 1, a plurality of rollers 3 being integrated in the turntable. The rollers 3 integrated with the turntable 2 project from it in such a way as to be able to support a pallet, not shown here, and are provided with a movement device 4 which is integrated with them in such a way as to avoid the use of traditional roller conveyors and to reduce the total thickness of the platform 10 to around 10 centimeters.

(13) The movement device 4 comprises at least one motor 41 inside a roller 3′, an example of which is shown in FIG. 10, and motion transmission means 42, which are suitable for connecting the rollers 3 to each other. In the example embodiment shown in the figures, the motion transmission means 42 comprise gear wheels 42a fixed to the rollers 3 and a plurality of belts 42b, shaped to match the gear wheels 42a, which are suitable for connecting pairs of gear wheels 42a of adjacent rollers 3. In this solution, the movement device 4 comprises two motors 41 inside two rollers 3′, in such a way as to make two sets of autonomously moved rollers 3.

(14) The movement device 4 for the rollers 3 receives power from a power device 6 comprising an electricity dispenser 61, conducting cables 62 housed in a duct 63 fixed to the base 1 and leading to a slip ring 64 connected to the motors 41 inside the rollers 3′.

(15) The platform 10 is also provided with a retaining device 5 for a flap of a plastic film for wrapping the pallet. It comprises a gripper 51 for clamping the film and control means 52 for the gripper 51, formed by an electronic control unit 52a which controls a compressed air device 52b.

(16) The compressed air device 52b comprises a dispenser 521 of compressed air, a duct 522 fixed to the fixed base 1 leading to a rotary joint 523 fixed to the turntable 2, and a pair of pistons 524 connected to the rotary joint 523 by means of cables 525, which are suitable for making the gripper 51 pass from a closed position, in which it clamps the film at the start of wrapping, to an open position, and vice versa.