WO2002046078A1

WO2002046078A1 - Stacking device for flat stackable elements

Info

Publication number: WO2002046078A1
Application number: PCT/DE2001/004425
Authority: WO
Inventors: Rudolf Zimmermann; Josef Pfeffer
Original assignee: Siemens Aktiengesellschaft
Priority date: 2000-12-04
Filing date: 2001-11-23
Publication date: 2002-06-13
Also published as: EP1292521B1; US20040017040A1; DE10060178A1; DE50102420D1; EP1292521A1

Abstract

The invention relates to a stacking device (3, 4) that comprises a movable and a further stacking wall (1, 2) between which flat stackable elements (3, 4) can be stacked. An impact wall (5) defines the path of insertion for a stackable element (4) newly introduced between the stacking walls (1, 2). The movable stacking wall (1) is impinged by a restoring element (6) with a restoring force (F) in the direction of the further stacking wall (2). A braking element (6) partially converts the kinetic energy of the movable stacking wall (1) to thermal energy independent of the position thereof.

Description

description

Stacking device for flat stacking elements

The present invention relates to a stacking device for flat stacking elements, with a movable and a further stacking wall, between which the stacking elements can be stacked, and an impact wall, by means of which an insertion path for a stacking element newly inserted between the stacking walls is limited, the movable stacking wall in the direction a restoring force is applied to the further stack wall by means of a restoring element.

Such stacking devices are known. They are used in particular in automated distribution systems for letters and letter-like mail. The stack grows along the baffle starting at the stacking wall facing the conveyor line. The goal is a geometrically exact stack even with heavy and thick items.

The mail items are introduced into the stacking device at a relatively high conveying speed. The speeds are up to 5 meters per second. In the case of heavy and thick mail items, faults occur as a result of rebound from the baffle and / or excessive deflection of the movable stacking wall.

It is known in the prior art to use, in addition to the retraction spring, additional movement damping by means of longitudinal locking of the movable stack wall. It is also known to provide the movable stack wall with a soft coating. However, both measures do not lead to the desired properties, in particular when the stacking compartment is empty or only slightly filled, and especially when there is a succession of relatively thick and heavy items. The object of the present invention is to further develop a stacking device of the type mentioned at the outset such that reliable operation of the stacking device is possible regardless of the weight of the stacking elements even when the stacking device is empty or only slightly filled.

The object is achieved in that a braking element is assigned to the movable stack wall, by means of which the kinetic energy of the movable stack wall can be partially converted into thermal energy independently of the position.

If the braking element is designed in such a way that the kinetic energy of the movable stack wall can essentially only be converted into thermal energy when the further stack wall is moved, the movable stack wall is returned to its starting position more quickly.

If the braking element is designed such that the proportion of the kinetic energy of the movable stack wall converted into thermal energy increases with increasing acceleration of the movable stack wall, the stacking device works particularly reliably.

If the movable and the other stacking wall form an opening angle between 0 ° and 30 °, easy insertion of newly added stacking elements is guaranteed.

If the restoring element is designed as a spring-loaded winding drum for a cable pull, which is connected to the movable stacking wall by means of the cable pull, the restoring element is of simple construction and requires only little installation space.

If the cable pull forms a single-layer winding on the winding drum, the stacking device works particularly safe and trouble-free. In particular, the cable cannot jam.

If the cable is wound conically on the winding drum, the coupling between the restoring element and the movable stacking wall can be varied as required.

If the winding drum is mounted displaceably in the direction of the cable pull going out of the winding drum and the winding drum is assigned at least one brake shoe which can be adjusted to a braking area when the movable stack wall moves away from the further stack wall, it can be achieved in a structurally simple manner that the kinetic energy of the movable stack wall can essentially only be converted into thermal energy when it moves away from the further stack wall.

If the brake shoe is designed as a running brake shoe, there is a self-reinforcing braking effect.

If the winding drum is rotatably mounted around a drum pivot point, the brake shoe is pivotally pivoted about a pivot point and a distance connecting the pivot point and the drum pivot point runs parallel to the direction of displacement of the winding drum, there results a particularly advantageous interaction of the winding drum and brake shoes.

The brake shoe can either be fixed or arranged on the winding drum. If, in the latter case, the brake shoe is mounted and designed such that it rotates automatically against the braking area due to the centrifugal force when the winding drum rotates, the centrifugal force can be used to adjust the braking shoe against the braking area. If the brake shoes with a co pressible lining, e.g. B. felt or leather, and / or the braking area is made of a material that does not change under the influence of air, for. B. made of polished brass or plastic, there is a particularly gentle braking effect.

Further advantages and details emerge from the following description of an exemplary embodiment in conjunction with the drawings. Show in principle

1 shows a stacking device from above, FIG. 2 shows the stacking device from FIG. 1 from the front, FIG. 3 shows a winding drum from the side, FIG. 4 shows the winding drum from FIG. 3 from the opposite side, and FIG. 5 shows the winding drum from FIG. 3 from above.

According to FIG. 1, a stacking device has a movable stacking wall 1 and a further, fixed stacking wall 2. The movability of the movable stacking wall 1 is indicated in FIGS. 1 and 2 by a double arrow A. Flat stacking elements 3, 4 can be stacked between the stacking walls 1, 2. The stacking elements 3, 4 can e.g. B. Letters. The stacking elements 3 have already been stacked according to FIG. 1, the stacking element 4 is newly fed to the stack.

The feeding of the stacking element 4 to the stack takes place in that the stacking element 4 is shot into the stack, so to speak, at an insertion speed v in an insertion direction x. The insertion speed v is up to 5 meters per second. The stacking device therefore also has an impact wall 5, by means of which an insertion path for the stack element 4 newly introduced between the stacking walls 1, 2 is limited. For easy insertion of the stacking element 4, the stacking walls 1, 2 form an opening angle α. The opening angle α is between 0 ° and 30 °, z. B. between 10 ° and 20 °.

When the stack element 4 is inserted, the movable one springs

Stacking wall 1 against a restoring force F and then back to its starting position. The movable stacking wall 1 is thus subjected to the restoring force F in the direction of the fixed stacking wall 2. The restoring force F is applied by a restoring element 6, which is connected to the movable stacking wall 1 via a cable 7.

3 - 5, the reset element 6 is designed as a spring-loaded winding drum 6 for the cable 7. The cable 7 forms a single-layer winding on the winding drum 6. This can be seen particularly clearly from FIG. 5.

5, the winding drum 6 is cylindrical. The winding drum 6 could, however, also run conically, as indicated by dashed lines or dash-dotted lines in FIG. In this case, the cable 7 would be wound conically on the winding drum 6. The coupling between the movable stacking wall 1 and the winding drum 6 can thus be varied as required by appropriate design of the winding drum 6.

The restoring element 6 not only serves to return the movable stacking wall 1, but is also designed as a braking element 6. The winding drum 6 is thus able to convert kinetic energy of the movable stacking wall 1 into thermal energy regardless of position, provided that this energy is not reversibly absorbed by a return spring 8. The return spring 8 is shown in particular in FIG. 4.

To apply the braking effect, a brake shoe 9 is assigned to the winding drum 6. 3 is shown in FIG 1 1 tn 4-> ω 1 1 1 1

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stack wall 1 increases. This is because the stronger a power surge that acts on the movable stacking wall 1, the stronger the brake shoe 9 is placed against the braking area 12. This results in an increased braking effect, which is desirable according to the invention.

According to FIGS. 3-5, the brake shoe 9 is mounted in a stationary manner, i. H. it does not rotate with the winding drum 6, but is only turned on it. However, it is also possible to arrange the brake shoe 9 on the winding drum 6 itself and to position it against a fixed braking area 12. In this case, it is in particular possible to mount and design the brake shoe 9 in such a way that it automatically adjusts to the braking area 12 when the winding drum 6 rotates due to the centrifugal force.

Claims

claims

1. Stacking device for flat stacking elements (3, 4), with a movable and a further stacking wall (1, 2) between which the stacking elements (3, 4) can be stacked, and an impact wall (5), by means of which an insertion path for a newly inserted between the stacking walls (1, 2) stacking element (4), wherein the movable stacking wall (1) in the direction of the further stacking wall (2) is acted upon by a restoring element (6) with a restoring force (F), characterized in that The movable stacking wall (1) is assigned a braking element (6), by means of which kinetic energy, the movable stacking wall (1) can be partially converted into thermal energy independently of the position.

2. Stacking device according to claim 1, so that the braking element (6) is designed in such a way that the kinetic energy of the movable stacking wall (1) can essentially only be converted into thermal energy when the further stacking wall (2) moves away.

3. Stacking device according to claim 1 or 2, so that the brake element (6) is designed such that the proportion of the kinetic energy converted into thermal energy of the movable stack wall (1) increases with increasing acceleration of the movable stack wall (1).

4. Stacking device according to claim 1, 2 or 3, so that the movable and the further stacking wall (1, 2) form an opening angle (α) between 0 ° and 30 °.

5. Stacking device according to one of the above claims, characterized in that that the restoring element (6) is designed as a spring-loaded winding drum (6) for a cable pull (7) which is connected to the movable stacking wall (1) by means of the cable pull (7).

6. Stacking device according to claim 5, so that the cable pull (7) forms a single-layer winding on the winding drum (6).

7. Stacking device according to claim 5 or 6, so that the cable pull (7) is wound conically on the winding drum (6).

8. Stacking device according to claim 5, 6 or 7, so that the winding drum (6) is displaceably mounted in the direction (y) of the cable pull (7) going out from the winding drum (6).

9. Stacking device according to one of claims 5 to 8, characterized in that the winding drum (6) is assigned at least one brake shoe (9) - which, when the movable stack wall (1) moves away from the further stack wall (2) a braking area (12) can be set.

10. Stacking device according to claim 9, so that the brake shoe (9) is designed as an accumulating brake shoe (9).

11. Stacking device according to claim 8 and 9 or 8 and 10, characterized in that the winding drum (6) is rotatably mounted about a drum pivot point (14), that the brake shoes (9) by one The pivot point (10) is pivotally mounted and that a line connecting the pivot point (10) and the drum pivot point (14) runs parallel to the direction of displacement (y) of the winding drum (6).

12. Stacking device according to claim 9 or 10, so that the brake shoes (9) are arranged on the winding drum (6).

13. Stacking device according to claim 12, so that the brake shoe (9) is mounted and designed such that it automatically adjusts to the braking area (12) due to the centrifugal force when the winding drum (6) rotates.

14. Stacking device according to one of claims 9 to 13, that the brake shoes (9) with a compressible lining (13), for. B. felt or leather are coated.

15. Stacking device according to claim 14, d a d u r c h g e k e n n z e i c h n e t that the braking area (12) consists of a material that does not change under the influence of air, z. B. made of polished brass or plastic.