DEVICE AND METHOD FOR INSERTING AN APERTURE IN A PART-REGION OF A FILM WRAPPING OF A GOODS STACK PREFERABLY ARRANGED ON A PALLET, WHERE THE FILM WRAPPING IS PREFERABLY CONFIGURED AS A FILM HOOD DRAWN OVER THE GOODS STACK OR AS A FILM SLEEVE SURROUNDING THE GOODS STACK AT LEAST IN PART

Abstract

A device for inserting an aperture in a film wrapping of a goods stack arranged on a pallet, where the film wrapping is a film hood drawn over the goods stack or as a film sleeve surrounding the goods stack is disclosed.

A piercing element has a rotatably attached actuation arm. The piercing element exhibits first and second part-regions. The first part-region is mounted rotatably on the actuation arm and the second part-region includes the piercing region. The second part-region is pivotable relative to the first part-region from an original position against a restoring force. A corresponding system and a method for inserting an aperture in a part-region of a film wrapping of a goods stack arranged on a pallet is disclosed, where the film wrapping is configured as a film hood drawn over the goods stack or as a film sleeve surrounding the goods stack.

Claims

1. Device for inserting an aperture (11) into a part-region of a film wrapping of a goods stack (1) preferably arranged on a pallet, where the film wrapping comprises a film hood (2) drawn over the goods stack (1) and possibly a bottom film sheet arranged underneath the goods stack (1) or the film wrapping comprises a film sleeve surrounding the goods stack (1) at least in part and possibly a bottom film sheet arranged underneath the goods stack (1), a) Where the film wrapping is welded with a bottom film sheet situated underneath the goods stack (1), forming a weld seam horizontally encircling the goods stack (1), and Either The aperture (11) is inserted in the weld seam or else The aperture (11) is inserted in the region of the bottom film sheet surrounding the goods stack or b) Where the film wrapping exhibits a collar shrinkage (4) encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar shrinkage (4) or c) Where the film wrapping exhibits a collar stretch encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar stretch, Where the device comprises a piercing element (7) with a piercing region (10) and at least one actuation arm (9) to which the piercing element (7) is attached rotatably about a rotation axis (8), wherein the piercing element (7) exhibits a first part-region (15) and a second part-region (16), where the first part-region (15) is mounted rotatably on the actuation arm (9) is and where the second part-region (16) exhibits the piercing region (10) and where the second part-region (16) is pivotable relative to the first part-region (15) in at least one direction from an original position against a restoring force.

2. Device according to claim 1, wherein the first part-region (15) and the second part-region (16) are connected with each other via a joint.

3. Device according to claim 2, wherein the first part-region (15) and the second part-region (16) are connected with each other via a spring joint (17).

4. Device according to claim 1, wherein the piercing element (7) is configured in the manner of a blade.

5. Device according to claim 1, wherein in the original position the first part-region (15) and the second part-region (16) are in alignment with each other.

6. Device according to claim 1, wherein the edge of the free end of the second part-region (16) is configured at least in part as beveled or rounded in the direction in which the second part-region (16) is pivotable against the restoring force.

7. Device according to claim 1, wherein the edge of the free end of the second part-region (16) and/or the surface of the second part-region (16) interacting with the inside of a film hood (2) exhibits (exhibit) a friction-minimizing coating and/or friction-minimizing surface.

8. Device according to claim 1, wherein the free end of the second part-region (16) exhibits in the piercing region (10) an overhang (23) projecting relative to the edge.

9. Device according to claim 1, wherein the actuation arm (9) exhibits adjacent to the rotation axis (8) about which the piercing element (7) is mounted rotatably, at least one cutting blade (24) extending parallel to the rotation axis (8) and oriented orthogonally to the actuation arm (9), arranged in such a way at the actuation arm (9) that the cutting blade (24) is arranged after piercing, preferably during the downward displacement, on the side facing downward of the actuation arm (9).

10. Device according to claim 9, wherein the cutting blade (24) is formed by two cutting blade part-regions (25, 26) oriented obliquely to each other and forming between them a funnel-shaped insertion region.

11. System comprising a goods stack (1), preferably arranged on a pallet, with a film wrapping, where the film wrapping comprises a film hood (2) drawn over the goods stack (1) and possibly a bottom film sheet arranged underneath goods stack (1) or the film wrapping comprises a film sleeve surrounding the goods stack (1) at least in part and possibly a bottom film sheet arranged underneath the goods stack (1), a) Where the film wrapping is welded with a bottom film sheet situated underneath the goods stack (1), forming a weld seam encircling the goods stack (1) horizontally, and Either The aperture (11) is inserted in the weld seam or else The aperture (11) is inserted in the region of the bottom film sheet surrounding the goods stack or b) Where the film wrapping exhibits a collar shrinkage (4) encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar shrinkage (4) or c) Where the film wrapping exhibits a collar stretch encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar stretch, And at least one device which comprises a piercing element (7) with a piercing region (10) and at least one actuation arm (9) to which the piercing element (7) is attached rotatably about a rotation axis (8), wherein the device is configured according to claim 1 and that by means of this device an aperture (11) can be inserted in the weld seam or in the region of a bottom film sheet surrounding the goods stack (1) or in the collar shrinkage (4) or in the collar stretch.

12. System according to claim 11, wherein the system exhibits a rack and a carrier arm mounted on it rotatably about a vertical axis and drivable about the axis for a winding mandrel (5) suspended on it, where on the carrier arm there is arranged a guide sled which is relocatable in its longitudinal direction and on the guide sled there are suspended the winding mandrel (5) and a guide pole extending parallel thereto, and that at the guide pole there is guided a vertically relocatable lifting sled with a suction device connectable to a negative pressure device for area-by-area lifting of the film hood (2) from the goods stack (1) and with a separating device which separates a film flap (6) from the film hood (2), and that a further separating device is provided for a vertical separating cut.

13. System according to claim 12, wherein the further separating device is a knife moveable with a drive along the guide pole.

14. System according to claim 12, wherein the further separating device is a heated wire extending in parallel to the winding mandrel.

15. System according to claim 11, wherein the system exhibits at least one conveyor for transporting the goods stack (1) to and from.

16. Method for inserting an aperture (11) in a part-region of a film wrapping of a goods stack (1) preferably arranged on a pallet, where the film wrapping comprises a film hood (2) drawn over the goods stack (1) and possibly a bottom film sheet arranged underneath the goods stack (1) or the film wrapping comprises a film sleeve surrounding the goods stack (1) at least in part and possibly a bottom film sheet arranged underneath the goods stack (1), a) Where the film wrapping is welded with a bottom film sheet situated underneath the goods stack (1), forming a weld seam encircling the goods stack (1) horizontally, and Either The aperture (11) is inserted in the weld seam or else The aperture (11) is inserted in the region of the bottom film sheet surrounding the goods stack or b) Where the film wrapping exhibits a collar shrinkage (4) encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar shrinkage (4) or c) Where the film wrapping exhibits a collar stretch encircling the goods stack (1) horizontally, preferably horizontally oriented, and the aperture (11) is inserted in the collar stretch, by means of a device comprising a piercing element (7) with a piercing region (10) and at least one actuation arm (9) on which the piercing element (7) is mounted rotatably about a rotation axis (8), where the film hood (2) is pulled away from the goods stack (1) and held in the pulled-away position, where the piercing element (7) is inserted between the goods stack (1) and the film wrapping through an insertion aperture (11) and subsequently the piercing element (7) is displaced downward, such that with its piercing region (10) it inserts an aperture (11), wherein the piercing element (7) exhibits a first part-region (15) and a second part-region (16), where the first part-region (15) is attached, preferably rotatably, to the actuation arm (9) and where the second part-region (16) exhibits the piercing region (10) and where the second part-region (16) is pivotable from an original position against a restoring force relative to the first part-region (15), and the second part-region (16) is pivoted through travelling along the inside of the film wrapping during the downward displacement against the restoring force in the direction of the goods stack (1) and as a result of the deflection of the second part-region (16) the piercing element (7) with its piercing region (10) strikes the weld seam to be pierced or the region to be pierced of a bottom film sheet surrounding the goods stack (1) or the collar shrinkage (4) to be pierced or the collar stretch to be pierced.

17. Method according to claim 16, wherein after the piercing of the weld seam or of the region of a bottom film sheet surrounding the goods stack (1) or of the collar shrinkage (4) or of the collar stretch, in order to enlarge the pierced aperture (11) the film wrapping in the region of the pierced aperture (11) is pulled away from the goods stack (1).

18. Method according to claim 17, wherein the film wrapping including any weld seam that may still be joined with the lower margin of the film wrapping or including any film bulge of welded film material that may still be joined with the lower margin of the film wrapping is pulled away from the goods stack (1) through a displacement of the piercing element (7) from the goods stack (1) in the region of the pierced aperture (11).

19. Method according to claim 16, wherein after the piercing of the weld seam or of the region of a bottom film sheet surrounding the goods stack (1) or of the collar shrinkage (4) or of the collar stretch, during a further displacement, preferably during a further downward displacement, the device cuts vertically through residues of any remaining material accumulation in the lower margin of the film wrapping.

20. Method according to claim 16, wherein in the side of the goods stack (1) on which an aperture (11) is to be inserted, at least one film flap (6) is separated out from the film wrapping, forming an insertion aperture, the film flap (6) is attached to a winding mandrel (5) and the film wrapping is pulled away from the goods stack (1) and held in the pulled-away position.

21. Method according to claim 20, wherein after the piercing on the side of the goods stack (1) in which the aperture (11) has been inserted, the film wrapping is cut open vertically, the winding mandrel (5) guided around the goods stack (1), and thereby the film wrapping is wound on the winding mandrel (5) which is rotating about its longitudinal axis.

22. Method according to the claim 21, wherein the film wrapping wound on the winding mandrel (5) is, after complete winding, stripped off the winding mandrel (5) by means of at least one transfer device and transported to a waste disposal site.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In the following, the embodiment examples of the invention depicted in the drawings are elucidated. The drawings show:

[0067] FIG. 1a A side view of a goods stack with a film hood drawn over it with a collar shrinkage, where an aperture has been pierced in the film hood by means of a known device,

[0068] FIG. 1b The object in accordance with FIG. 1a, where the device has been moved back again to its starting position,

[0069] FIG. 2a-f The course of movement of the invention's device,

[0070] FIG. 3a-c A plan view of the piercing element of the invention's device, a first side view in the original position, and a second side view in the pivoted position,

[0071] FIG. 4a+b Two side views of a packaged goods stack, where two film flaps have already been separated out and the film flaps in FIG. 4a are clamped by a winding mandrel,

[0072] FIG. 5a-c The elevating of the piercing element, where drawing a) depicts a side view of the front side of the goods stack, drawing b) a side view of the longitudinal side of the goods stack, and drawing c) a plan view,

[0073] FIG. 6a-c The insertion of the piercing element into the insertion aperture, where drawing a) depicts a side view of the front side of the goods stack, drawing b) a side view of the longitudinal side of the goods stack, and drawing c) a plan view,

[0074] FIG. 7a-c The position of the piercing element shortly before piercing, where drawing a) depicts a side view of the front side of the goods stack, drawing b) a side view of the longitudinal side of the goods stack, and drawing c) a plan view,

[0075] FIG. 8 The detail “X” from FIG. 7a,

[0076] FIG. 9a-c The position of the piercing element after piercing, where drawing a) depicts a side view of the front side of the goods stack, drawing b) a side view of the longitudinal side of the goods stack, and drawing c) a plan view,

[0077] FIG. 10a+b The detail “Y” from FIG. 9a and a plan view of the detail “Y” from FIG. 9a,

[0078] FIG. 11a-c Two plan views of the goods stack, where the piercing element is moved away from the goods stack in order to enlarge the length of the aperture, and the device in an enlarged depiction in plan view,

[0079] FIG. 12a-c The position of the piercing element after movement into its starting position, where drawing a) depicts a side view of the front side of the goods stack, drawing b) a side view of the longitudinal side of the goods stack, and drawing c) a plan view, and

[0080] FIG. 12d A plan view of s part-region of the device, where in this position the piercing element is oriented in parallel to the actuation arm.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S)

[0081] In all the drawings, consistent reference labels are used for identical and/or similar respectively components.

[0082] FIGS. 1a and 1b show a goods stack 1, over which a film hood 2 is drawn as film wrapping. The goods stack 1 is arranged on a pallet 3. The lower margin of the film hood 2 forms a horizontally oriented collar shrinkage 4, which arises during shrinking of the relevant region. The collar shrinkage 4 abuts on the pallet 3 tautly and tightly. The collar shrinkage 4 engages the marginal region of the upper board layer of the pallet 3 from underneath. A collar shrinkage 4 involves a material accumulation of welded film material.

[0083] Laterally adjacent to the goods stack 1 there is depicted a winding mandrel 5. As can be seen in the drawings, on one side of the film hood 2 there have been cut out by means of three incisions each two film flaps 6 which are attached to the winding mandrel 5. After attaching the film flaps 6, the film hood 2 is pulled away slightly from the goods stack 1 by means of the winding mandrel 5.

[0084] Each of the two film flaps 6 cut out on three sides constitutes an insertion aperture. Through the lower insertion aperture there is inserted part of a device for inserting an aperture. As can be seen in FIGS. 1a and 1b, the device exhibits a blade-like piercing element 7 which is attached rotatably about a rotation axis 8 to an actuation arm 9 of the device. The mounting of the actuation arm 9 is not depicted in further detail.

[0085] In the region of the end facing downward in FIGS. 1a and 1b, the piercing element 7 exhibits a piercing region 10. The arranged of the piercing region 10 is depicted as an example in FIGS. 3a and 3b, which show the piercing element 7 in an enlarged depiction. After the insertion of the piercing element 7 into the insertion aperture, the piercing element 7 is displaced downward. During the downward displacement the piercing element 7 is guided at a distance from the goods stack 1 and strikes the taut film hood 2. In the contact region, the piercing element 7 inserts an aperture 11.

[0086] As can be seen in FIG. 1b, however, the aperture 11 is inserted at a distance from the collar shrinkage 4 which directly abuts the pallet 3. Therefore, a part of the film hood 1 remains at the collar shrinkage 4. After complete unpacking, this remaining part hangs down and can, for example, cover the free space between two runners of the pallet 3.

[0087] FIGS. 2a to 2f and 3a to 3c show the invention's device for inserting an aperture 11 in a weld seam oriented horizontally between a bottom film sheet and a film hood welded with the bottom film sheet and drawn over a goods stack or for inserting an aperture in a horizontally oriented collar shrinkage 4 or in a horizontally oriented collar stretch of a film hood 2 drawn over a goods stack 1 arranged on a pallet 3. A goods stack 1 covered with a film hood 2 and set down on a pallet 3 is depicted as an example in FIG. 1a.

[0088] The device comprises a piercing element 7 with a piercing region 10 and an actuation arm 9. In the depicted embodiment example, the actuation arm 9 is configured in two parts, where the two parts of the actuation arm 9 are connected with one another by means of a a rotary joint 12. If the device is arranged adjacent to a conveyor on which the goods stacks 1 to be unpacked are transported, the actuation arm 9 can for example be installed on the structure of the conveyor. To further modify the tilt of the actuation arm 9, a rotary bearing 13 is provided. To modify the distance between the piercing element 7 and the pallet 3, the rotary bearing 13 can for example be attached on a sled which is oriented orthogonally to the longitudinal side of the goods stack 1. Thereby the device can be moved in the direction of the arrow 14 marked in FIG. 11b nearer to the goods stack 1 or moved away from it.

[0089] The piercing element 7 exhibits a first part-region 15 and a second part-region 16, where the first part-region 15 is mounted rotatably around the rotation axis 8 on the actuation arm 9 and the second part-region 16 exhibits the piercing region 10. In the depicted embodiment example, the first part-region 15 and the second part-region 16 are connected pivotably with each other via a spring joint 17.

[0090] The first part-region 15 exhibits a laterally projecting guide pin 18, on which a transfer element 19 is guided which is bolted to the second part-region 16. On the guide pin 18 there is furthermore mounted a spring 20 and secured with a bolt 21. The spring 20 pushes the transfer element 19 against the first part-region 15.

[0091] FIG. 3b depicts the device in the original position. In the original position, the first part-region 15 and the second part-region 16 are in alignment. The second part-region 16 can be pivoted from this original position relative to the first part-region 15 in the direction of the arrow 22 against the restoring force generated by the spring 20. The pivoted position of the second part-region 16 is depicted in FIG. 3c.

[0092] As can be seen in FIGS. 3a and 3b, the edge of the second part-region 16 is configured as beveled in the region of the free end, namely beveled in the direction in which the second part-region 16 is pivotable against the restoring force. The free end of the second part-region 16 exhibits an approximately rounded configuration. In addition, the free end of the second part-region 16 exhibits in the piercing region 10 an overhang 23 projecting relative to the edge, which in the depicted embodiment example is configured as approximately semi-circular.

[0093] As can be seen for example in FIG. 12d, the actuation arm 9 exhibits adjacent to the rotation axis 8, about which the piercing element 7 is mounted rotatably, a cutting blade 24 extending in parallel to the rotation axis 8 and oriented orthogonally to the actuation arm 9, arranged at the actuation arm 9 in such a way that during further downward movement after piercing, the cutting blade 24 is arranged on the underside of the actuation arm 9. The cutting blade 24 is formed by two cutting blade part-regions 25, 26 oriented obliquely to one another and forming between them a funnel-shaped insertion region.

[0094] The invention's method is depicted in FIGS. 4 to 12, where the devices necessary for unpacking are only implied. As can be seen for example in FIG. 4a, two U-shaped incisions are inserted in the film hood 2 in the region of a longitudinal side by means of a separating device which is not depicted. The separating device can involve, for example, a U-shaped heated wire. In the region of each U-shaped incision, a rectangular film flap 6 is hereby separated out. The film flaps 6 are taken in, for example by means of a suction device, and attached to a winding mandrel 5.

[0095] In FIG. 4 the invention's device is still situated in it starting position. In the depicted embodiment example, in the starting position the device is situated underneath the plane of the pallet.

[0096] In FIG. 5 the piercing element 7 has already been raised. As depicted in FIG. 6, the part of the actuation arm 9 at which the piercing element 7 is attached is then pivoted. The piercing element 7 is thereby inserted through the insertion aperture into the gap between the goods stack 1 and the film hood 2.

[0097] The piercing element 7 is situated thereby at a horizontal distance from the goods stack 1, as depicted for example in FIG. 7a. Subsequently the piercing element 7 is pivoted downward about the rotation axis 8. During this downward displacement, the piercing element 7 travels along the inside of the film hood 2. Due to the pivotable mounting of the second part-region 16 on the first part-region 15, the second part-region 16 is pivoted more and more into the position depicted in FIG. 8, whereas the first part-region 15 is displaced solely vertically downward. As a result, the piercing element 7 with its piercing region 10 strikes exactly the region to be pierced, in the present case the collar shrinkage 4.

[0098] In FIG. 9, the piercing element 7 has already inserted the desired aperture 11 in the collar shrinkage 4. Therefore the piercing element 7 stands out partially from under the film hood 2. FIG. 10a shows the detail “Y” from FIG. 9a and FIG. 10b a plan view of the detail “Y” from FIG. 9a. As can be seen in the drawings, the aperture 11 has already been inserted. The piercing element 7 stands out underneath. Since the aperture 11 has been inserted and thereby the film hood 2 is no longer taut in this region, the spring 20 has pivoted the second part-region 16 back to the original position.

[0099] In FIGS. 11b and 11c, in order to enlarge the pierced aperture 11 the actuation arm 9 is pivoted outward and thereby the piercing element 7 is displaced horizontally away from the goods stack 1. As a result, the film hood 2 is pulled away from the goods stack 1 in the region of the pierced aperture 11 and thereby the aperture 11 is enlarged.

[0100] In FIGS. 12a to 12d, the invention's device has again been displaced back to its starting position, as depicted in FIG. 4. By means of the cutting blade 24 which is recognizable in FIG. 12, after the piercing of the collar shrinkage 4 or of a collar stretch the device can during a further downward displacement cut vertically through residues of any remaining material accumulation in the lower margin of the film hood 2.

[0101] This is followed by the film removal. To this end, after the piercing on the side of the goods stack 1 in which the aperture has been inserted the film hood 2 is cut open vertically. The winding mandrel 5 is then guided around the goods stack 1. Thereby the film hood 2 is wound on the winding mandrel 5 which is rotating about its longitudinal axis.