Device for destacking cubic printed products

Abstract

A device for destacking books, brochures, or similar cubic printed products (2), wherein said device comprises a separating belt (6) that is powered by a controllable drive and serves for the cyclic separation of the respective bottom printed product (2a) from the stack (3a), lateral boundaries (8a, b) that can be adjusted to the respective format and position the stack (3a) on the separating belt (6), a height-adjustable retaining element (9) that forms a passage for the respective printed product (2a) to be separated, a support (10) in the infeed region of the separating belt (6) in order to support the rear edge of the printed product (2) lying on top of the bottom printed product during the separation of the bottom printed product (2a), and a feeding belt (5) that is arranged upstream of the separating belt (6) and serves for delivering the next stack (3b) into the separating position. In order to reliably and flawlessly separate, in particular, thick book blocks with a small format from high stacks, the destacking device (1) features at least one supporting element (15a, b) that is arranged at a defined distance behind the stack (3a) and can be moved out of the transport path during the delivery of the next stack (3b). The supporting element automatically moves out of the transport path during the delivery of the next stack (3b).

Description

Claims

1. A device for destacking books, brochures or similar cubic printed products comprising: a moveable separating belt having an infeed portion at its upstream end and powered by a controllable drive for the separation of the respective bottom printed product from a stack in a separating position on said supporting belt;lateral boundaries that can be adjusted to the respective format and position the stack on said separating belt;a height-adjustable retaining element that forms a passage for the respective printed product to be separated;a support at said infeed portion of said separating belt for supporting the rear edge of the printed product lying on top on the bottom printed product during separation of the bottom printed product;a feeding belt for delivering the next stack of printed product into the separating position; andat least one supporting element that is positioned a defined distance upstream from the rear of a stack in said separating position and positioned to be engaged by the rear of said stack as the bottom printed product is being separated, said supporting element being movable out of position to be engaged by a stack as the next stack is delivered into the separating position.

2. The device according to claim 1, wherein in that the at least one supporting element is arranged on said lateral boundary.

3. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary.

4. The device according to claim 1, wherein said supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height.

5. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary and each supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height.

6. The device according to claim 1, wherein said supporting element automatically moves out of position to be engaged by a stack as the next stack is delivered into the separating position.

7. The device according to claim 1, wherein said supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, and said supporting element automatically moves out of position to be engaged by a stack as the next stack is delivered into the separating position.

8. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, and each said supporting element automatically moves out of position to be engaged by a stack as the next stack is delivered into the separating position.

9. The device according to claim 1, wherein said supporting element is held in the position to be engaged by a driving means that generates a spring force and said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by a stack being delivered into the separating position.

10. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, each said supporting element is held in the position to be engaged by a driving means that generates a spring force, and said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by a stack being delivered into the separating position.

11. The device according to claim 1, wherein said supporting element is held in the position to be engaged by a driving means that generates a spring force, said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by a stack being delivered into the separating position, and said spring force is adjustable.

12. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, each said supporting element is held in the position to be engaged by a driving means that generates a spring force, each said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by a stack being delivered into said separating position, and said spring force is adjustable.

13. The device according to claim 1, wherein said supporting element is held in the position to be engaged by a driving means that generates a spring force, and said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by a stack being delivered into said separating position, and said driving means comprises at least one spring element.

14. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each said supporting element is held in the position to be engaged by a driving means that generates a spring force, said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by the stack being delivered, said spring force is adjustable, and said driving means comprises at least one spring element.

15. The device according to claim 1, wherein said supporting element is held in the position to be engaged by a driving means that generates a spring force, said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by the stack being delivered, said driving means comprises at least one spring element, and each said spring element consists of a leaf spring on which the supporting element is fixed.

16. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each said supporting element is held in the supporting position by a driving means that generates a spring force, each said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by the stack being delivered, said spring force is adjustable, said driving means comprises at least one spring element, and each said spring element consists of a leaf spring on which the supporting element is fixed.

17. The device according to claims 1, wherein said supporting element includes a ramp that is directed toward the next stack on the side pointing away from the stack to be supported.

18. The device according to claim 1, wherein the supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, said supporting element automatically moves out of the position to be engaged by a stack as the next stack is delivered into the separating position and said supporting element includes a ramp that is directed toward the next stack on the side pointing away from the stack to be supported.

19. The device according to claim 1, wherein the supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, said supporting element is held in the position to be engaged by a driving means that generates a spring force, said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by the stack being delivered, and said supporting element includes a ramp that is directed toward the next stack on the side pointing away from the stack to be supported.

20. The device according to claim 1, wherein a supporting element is respectively arranged on each lateral boundary, each said supporting element includes a strip-shaped supporting surface that is directed toward the rear side of the stack near the vertical stack edge and extends at least as far as the maximum stack height, said supporting element is held in the position to be engaged by a driving means that generates a spring force, said supporting element can be moved into a retracted position outside the lateral boundary against the spring force by the stack being delivered, said spring force is adjustable and said supporting element includes a ramp that is directed toward the next stack on the side pointing away from the stack to be supported.