EP2962968B1 - Device for separating sheet goods - Google Patents

Description

The present invention relates to a device for separating sheet material according to the preamble of patent claim 1 and to a method for separating sheet material according to the preamble of patent claim 15.

A generic device for separating sheet material has an actuator and a Blattgutaufnehmer coupled thereto. The actuator is designed to displace the Blattgutaufnehmers, for example, such that the Blattgutaufnehmer is placed in a translational movement or a rotational movement. For example, a prior art Blattgutaufnehmer is designed in the manner of a roller. In this case, the Blattgutaufnehmer is formed for receiving a single piece of sheet from a stack of sheets, wherein the sheet stack has a plurality of Blattgutstücken which is arranged in layers along a Lotrichtung one above the other.

The sheet material may be, for example, paper sheets, cardboard sheets or notes of value, for example banknotes, banknotes, checks or the like. A corresponding sheet stack thus includes, for example, a stack of banknotes, sheets of paper or cardboard sheets.

A generic device for separating sheet material is for example in the WO 2014/005715 A1 described. There, the Blattgutaufnehmer is designed in the form of an oscillating conveyor belt, can be removed with the individual Blattgutstücke of a sheet material stack. However, the conveyor belt does not attack on the uppermost piece of sheet material of the stack of sheets, but on the bottom sheet of the stack of sheets. The sheet items are thus withdrawn from the bottom of the sheet stack by the oscillating conveyor belt. GB 2 125 375 A discloses an apparatus according to the preamble of claim 1 and a method according to the preamble of claim 15. It is an object of the present invention to provide a means allowing safe and reliable singulation of sheet material. This technical problem is solved by one of the subjects of independent claims 1 and 15. Features of advantageous embodiments are specified in the dependent claims. According to the invention, it is provided that the actuator is designed to set the sheet material receiver in an oscillating rotational movement about an axis of rotation which is substantially parallel to the direction of the solder in order to receive the single piece of sheet material from the sheet material stack. Preferably, the individual piece of sheet material is the topmost or lowermost piece of sheet material of the sheet material stack.
The sheet material is, for example, paper sheets, cardboard sheets, notes of value, such as banknotes, banknotes, checks or the like. The sheet material stack preferably has a multiplicity of sheet goods of the same type. This facilitates the control of the actuator. The sheet items of the sheet stack are, for example, cuboid and each have a length, a width and a height, wherein the height of the respective Blattgutstücks is a fraction of the length and the width, as is the case for example with bills.
The actuator includes, for example, electromechanical means that are controllable to enable the Blattgutaufnehmer in said oscillating rotational movement about the axis of rotation. On the exact configuration of the actuator will be discussed in more detail later.
For example, the oscillating rotational movement extends about the axis of rotation along an angular range of less than 10 °. For example, the angle range is about 1 °. The actuator is therefore designed, for example, to rotate the Blattgutaufnehmer by about 1 ° about the axis of rotation and then cause rotational movement in the opposite direction.

The frequency of the oscillating rotational movement is preferably greater than 1 kHz. For example, the frequency of the oscillating rotational movement is about 40 kHz. The frequency of the oscillating rotational movement is preferably determined as a function of the height of the individual piece of sheet material. For example, the frequency is proportional to a reciprocal of the height.

In a further embodiment of the device, the actuator is configured to translate the sheet material pickup in a translational motion along the plumbing direction to force the sheet material pickup to receive the individual piece of sheet material on a surface of the individual sheet item with a given force. For example, the actuator positions the sheet material picker above the sheet stack to then press the sheet stock picker at a central location, such as at a midpoint, of the top sheet stock.

Preferably, the Blattgutaufnehmer is formed due to its oscillating rotational movement about the axis of rotation and due to a force exerted by the actuator for pressing the Blattgutaufnehmers on the surface of the individual Blattgutstücks an attraction between the Blattgutaufnehmer and the individual Blattgutstück cause to remove the individual Blattgutstück from Blattgutstapel. For example, a contact, for example a so-called surface-to-flexible-surface contact, is caused between the piece of sheet material and the individual piece of sheet material to be picked up and removed, which causes the emergence of the attraction force. Due to the induced attraction, it is possible to remove individual pieces of sheet from the sheet stack. For these purposes, the actuator is preferably configured to translate the sheet material pickup along a first direction substantially perpendicular to the plumbing direction to remove the picked sheet piece from the sheet stack, the first direction preferably being substantially perpendicular to a longitudinal side of the single sheet Blattgutstücks lies. Alternatively or additionally, it is preferred that the actuator is designed to set the Blattgutaufnehmer in a translational movement along a direction lying perpendicular to the perpendicular direction second direction to remove the recorded Blattgutstück from the sheet stack, the second direction preferably substantially parallel to the longitudinal side of the individual Blattgutstücks lies.

For example, the actuator is designed to initially position the Blattgutaufnehmer above the stack of sheets to then impress the Blattgutaufnehmer on the surface of the uppermost Blattgutstücks. Before, during or after, the actuator displaces the sheet material pickup in said oscillating rotational motion. This causes the attractive force between the distal end of the sheet receiver, which rests on the surface of the sheet piece, and the surface of the individual piece of sheet. The top sheet of the sheet stack therefore adheres to the distal end of the Blattgutaufnehmers. While maintaining the oscillating rotational movement, a translatory movement takes place along said first direction and / or along the second direction and / or along the perpendicular direction, so that only the uppermost piece of sheet material of the sheet stack is removed from the sheet stack and, for example, a sheet collection container or a sheet input device and / or a Blattgutausgabevorrichtung is supplied.

At its distal end, which has, in positioning the Blattgutaufnehmers above the stack of sheets to the surface of the uppermost Blattgutstücks, the Blattgutaufnehmer preferably has a recording head. Furthermore, a coupling element for coupling to the actuator is preferably provided at the proximal end of the Blattgutaufnehmers. The coupling element is preferably designed such that the actuator is designed to put the Blattgutaufnehmer in said oscillating rotational movement.

For example, the Blattgutaufnehmer with respect to the axis of rotation in terms of its mass distribution and / or in terms of its dimensions rotationally symmetrical, for example, substantially cylindrical, formed. Due to the rotationally symmetrical design of the Blattgutaufnehmers arises during the oscillating rotational movement no or at most a small imbalance force.

The receiving head provided at the distal end of the sheet material receiver may have a convex, a planar or a concave peripheral profile. For example, the Blattgutaufnehmer is rounded at its distal end, ie convex or concave, designed, for example, such that the receiving head is formed in relation to a lying on the axis of rotation reference point in approximately spherically symmetrical. Due to the approximately spherically symmetrical design of a convex receiving head of the Blattgutaufnehmers the contact surface between the surface of the uppermost Blattgutstücks the sheet stack and the Blattgutaufnehmer comparatively low.

In a further preferred embodiment, the Blattgutaufnehmer for contacting the individual Blattgutstücks on an elastic material. For example, the elastic material is silicone or another rubbery material, for example an elastomer. For example, the elastic material has a hardness of about 30 to 95 Shore A, for example about 40 Shore A.

In an exemplary embodiment, the sheet receiver comprises a base of a first material and a coating of a second material attached thereto, the second material containing the resilient material. The coating is provided, for example, on the receiving head and designed, for example, as a surface coating. For example, the main body is substantially cylindrical in shape with a length of about 10 mm and a radius of about 5 mm, wherein the thickness of the coating, for example, about 0.5 mm.

Preferably, the Blattgutaufnehmer is coupled via a fixed bearing to the actuator. The actuator has, for example, a rotation element and a translation element. The translation element is designed to put the Blattgutaufnehmer in said oscillating rotational movement. Via the translation element of the actuator is preferably carried out a displacement of the Blattgutaufnehmers along the Lotrichtung. Preferably, the coupling element of the Blattgutaufnehmers is coupled to the rotary member of the actuator. The translation element and the rotational element of the actuator are preferably coupled to one another via a rotary joint.

For controlling the actuator, the device has, for example, a control unit. The control unit is designed, for example, to provide control signals in accordance with a control program and to supply them to the actuator, which transforms the actuator into mechanical movements and thus displaces the sheet material receiver into said oscillating rotational movement and / or translatory movement.

Furthermore, the device may comprise a movably mounted coupling piece which couples the actuator to a stationary base. For example, the coupling piece is movably mounted in said first and / or second direction, which are perpendicular to the vertical direction, and is also supported by the control unit driven. In this example, the positioning of the Blattgutaufnehmers above the uppermost Blattgutstücks the sheet stack by means of the coupling piece take place, in which case the actuator and the Blattgutaufnehmer are not moved relative to the coupling piece. Only for pressing the Blattgutaufnehmers on the surface of the uppermost Blattgutstücks and for moving the Blattgutaufnehmers in said oscillating rotational movement of the actuator and the Blattgutaufnehmer are moved relative to the coupling piece.

A further aspect of the present invention is formed by the method according to independent claim 15. The method according to the invention for separating sheet material shares the advantages of the device according to the invention for separating sheet material and has preferred embodiments which correspond to the above-described preferred embodiments of the device of the first aspect correspond to the present invention, in particular, as defined in the dependent claims. In that regard, reference is made to the above.

It is particularly preferred that the method comprises positioning the Blattgutaufnehmers above the stack of sheet material and pressing the Blattgutaufnehmers on the surface of the uppermost Blattgutstücks the sheet stack and a displacement of the Blattgutaufnehmers in the oscillating rotation about the axis of rotation substantially parallel to the axis of rotation, to the to pick up and remove individual pieces of sheet material from the sheet stack. In this case, the displacement of the Blattgutaufnehmers in the oscillating rotational movement before pressing, during the pressing or after pressing the Blattgutaufnehmers on the uppermost Blattgutstück.

The object of the present invention is suitable for singulating sheet material of any type. In particular, the object of the present invention can be used for the separation of banknotes, such as banknotes or banknotes.

An advantage of the present invention is in particular that the separation of sheet material with few components can be done in a safe and reliable manner. In particular, the separation of sheet material can take place without a friction partner having to be provided in the device, which prevents the sheet material pieces lying below the top sheet material from being removed when the top sheet piece is picked up by the sheet material receiver.

In the above explanation of the device and the method for separating sheet material has always been assumed that the Blattgutaufnehmer attaches to the top sheet of the sheet material stack. But it is also possible that the Blattgutaufnehmer attaches to the bottom sheet of the sheet stack. In this variant, the Blattgutaufnehmer is pressed onto the underside of the lowermost Blattgutstücks and also offset in said oscillating rotational movement. This variant therefore has preferred embodiments which correspond to the preferred embodiments of the present invention described above, in particular as defined in the dependent claims. In that regard, reference is made to the above.

Fig. 1

eine schematische Querschnittsansicht von drei Blattgutstücken;

Fig. 2

eine perspektivische und schematische Ansicht einer Vorrichtung zum Vereinzeln von Blattgut;

Fig. 3

eine schematische Querschnittsansicht der in der Fig. 2 gezeigten Vorrichtung;

Fig. 4

eine weitere schematische Querschnittsansicht der in der Fig. 2 gezeigten Vorrichtung; und

Fig. 5A-C

schematische Querschnittsansichten eines Blattgutaufnehmers der in der Fig. 2 gezeigten Vorrichtung.

The idea underlying the invention will be explained in more detail with reference to the embodiments illustrated in the figures. Show it:

Fig. 1

a schematic cross-sectional view of three Blattgutstücken;

Fig. 2

a perspective and schematic view of an apparatus for separating sheet material;

Fig. 3

a schematic cross-sectional view of in the Fig. 2 shown device;

Fig. 4

a further schematic cross-sectional view of in the Fig. 2 shown device; and

Fig. 5A-C

schematic cross-sectional views of a Blattgutaufnehmers in the Fig. 2 shown device.

The Fig. 2 to Fig. 4 show schematic views of an apparatus 1 for separating sheet material. The Fig. 2 shows the device 1 in a perspective view and the Fig. 3 and Fig. 4 in cross-sectional views.

The device 1 is designed for separating sheet material. Specifically, individual sheet items 5-1 to 5-n, which are arranged in layers one above the other along a vertical direction y and thus form a sheet material stack 5, are to be singulated. For this purpose, the device 1 comprises a Blattgutaufnehmer 12, which is driven by an actuator 11 of the device 1. The actuator 11 thus displaces the Blattgutaufnehmer 12th in certain movements, which will be explained later. A schematic cross-sectional view of this Blattgutaufnehmers 12 is shown in the Fig. 5 shown.

In order to explain the design of the device 1 for separating sheet material and a method for separating sheet material, is below to all Fig. 2 to 5 Referenced. Based on Fig. 1 will be explained by way of example how certain control parameters for operating the device 1 can be calculated.

The actuator 11 has a translation element 111 and a rotation element 112. The actuator 11 is driven, for example, by a control unit, not shown in the figures, of the device 1.

The translation element 111 is designed for displacing the Blattgutaufnehmers 12 along the vertical direction y, and via the rotation member 112 of the actuator 11 is an offset of the Blattgutaufnehmers in an oscillating rotational movement about an axis of rotation r, which is parallel to the y direction.

In addition, the actuator 11 with the translation element 111 and the rotation element 112 along a substantially perpendicular to the vertical direction y lying first direction x and / or second direction z is arranged movably, so that a recorded Blattgutstück 5-1 in the x-direction or z-direction can be removed from the sheet stack 5.

The sheet material stack 5 is, for example, a stack of paper sheets, cardboard sheets, banknotes (for example banknotes, banknotes or checks) or similar sheet-like media. These are arranged one above the other along the vertical direction y and thus form the sheet material stack 5. Each of the sheet goods 5-1 to 5-n has the same length L, the same width B and the same height H in the example shown. However, the subject matter of the present invention does not require that all sheets 5-1 to 5-n have the same dimensions.

For receiving a single piece of sheet material, namely the uppermost piece of sheet material 5-1, the actuator 11 is initially positioned with the Blattgutaufnehmer 12 coupled thereto above the sheet material stack 5. Then, the actuator 11 presses the Blattgutaufnehmer 12 on a surface 51 of the uppermost Blattgutstücks 5-1, for example, at a central location of the uppermost Blattgutstücks 5-1, as shown in the Fig. 2 is shown schematically. Then, the actuator 11 pushes the Blattgutaufnehmer 12 by means of the translation element 111 with a certain force on the surface 51 of the uppermost Blattgutstücks 5-1. Before, during or after pressing the Blattgutaufnehmers 12 on the surface 51 of the actuator 11 offset the Blattgutaufnehmer 12 by means of the rotation member 112 in an oscillating rotational movement about the rotation axis r.

The oscillating rotational movement about the rotation axis r extends over an angular range of less than 10 °. For example, the actuator 11 rotates the Blattgutaufnehmer 12 by angle φ of 1 ° about the rotation axis r along a rotational direction rr. Thereafter, the actuator 11 sets the sheet material pickup 12 in rotation by 1 ° along the opposite direction of rotation rr and repeats this operation at a certain frequency. This oscillating rotational movement takes place, for example, at a frequency that is greater than 1 kHz. For example, the frequency is about 20 to 40 kHz. The frequency is determined, for example, as a function of the height H of the individual piece of sheet 5-1. For example, the frequency is proportional to a reciprocal of the height H of the individual piece of sheet 5-1. This will be later with reference to the Fig. 1 explained in more detail.

With reference to the Fig. 5A-C will first be discussed in more detail on exemplary design options of Blattgutaufnehmers 12. The Blattgutaufnehmer 12 includes at its proximal end a coupling element 121, which in the Fig. 5 is shown only schematically. About the coupling element 121 of the Blattgutaufnehmer 12 is coupled to the rotary member 112 of the actuator 11.

The Blattgutaufnehmer 12 is designed substantially cylindrical, in particular so rotationally symmetrical with respect to the rotation axis r. At its distal end, the Blattgutaufnehmer 12 has a receiving head 122.

In the in the Fig. 5A In the example shown, the pickup head 122 is spherically symmetric and convex with respect to a reference point P located on the rotation axis r. In other words, the receiving head 122 - and thus the distal end of the Blattgutaufnehmers 12 - has a convex circumferential course. The surface of the pickup head 122 can thus be designed such that each point lying on it has a same distance R from the reference point P, which consequently corresponds to a spherical radius. Depending on the application or depending on the type of sheet material, this radius R is fixed.

In the example according to the Fig. 5A The Blattgutaufnehmer 12 has a base body 12-1 which is formed of a first material and a coating 12-2 of a second material which is different from the first material. The second material of the coating 12-2 comprises an elastic material, for example silicone or another rubber-like material. The first material of the main body 12-1 of the Blattgutaufnehmers 12 has an elasticity which is less than the elasticity of the material of the coating 12-2. The coating 12-2 is provided in the example shown only on the receiving head 122 and has a small thickness of one millimeter or less than one millimeter, for example, 0.5 mm.

The Blattgutaufnehmer 12 must not necessarily have at its distal end, however, a convex circumferential course and / or said coating 12-2. In the variant according to the Fig. 5B the receiving head 122 - and thus the distal end of the Blattgutaufnehmers 12 - a substantially planar circumferential course, and in the variant according to the Fig. 5C the receiving head 122 - and thus the distal end of the Blattgutaufnehmers 12 - has a substantially convex circumferential course.

Depending on the type of sheet piece 5-1, ..., 5-n to be picked up, a certain circumferential course of the receiving head 122 may be more appropriate than another. Although in the Fig. 3 and in the Fig. 4 the Blattgutaufnehmer 12 is shown with a convex circumferential course having receiving head 122, the local Ausführungsbespiele are not limited to such a receiving head 122. Rather, the receiving head 122 can also in the examples according to the Fig. 3 and Fig. 4 have a substantially planar or a concave circumferential course.

After the actuator 11 has pressed the sheet material pickup 12 onto the surface 51 of the uppermost sheet piece 5-1 and has set the sheet stock picker 12 in said oscillating rotary motion, the uppermost sheet piece 5-1 is displaced by a first distance Δ1 in the direction x and an underlying sheet piece 5-2 by a second distance Δ2. Clearly at the Fig. 4 it can be seen that the first distance Δ1 is significantly greater than the second distance Δ2.

Ultimately, the pressing of the Blattgutaufnehmers 12 and the oscillating rotational movement of the Blattgutaufnehmers 12 allows removal of the uppermost Blattgutstücks 5-1 of the sheet material stack 5. The actuator 11, while maintaining the oscillating rotational movement of the Blattgutaufnehmers 12 deduct the uppermost Blattgutstück 5-1 from the sheet stack 5 and convey, for example, to a (not shown in the figures) Blattgutausgabevorrichtung. After the delivery of the conveyed sheet piece 5-1, the actuator 11 returns to the stack of sheets 5 and moves with the next piece of sheet 5-2 in the same manner.

The Blattgutaufnehmer 12 is thus formed, due to its oscillating rotational movement about the rotation axis r and due to the force exerted by the actuator 11 for pressing the Blattgutaufnehmers 12 on the surface 51 of the uppermost Blattgutstücks 5-1 an attractive force between the Blattgutaufnehmer 12 and the individual Blattgutstück 5- 1, so that the single piece of sheet 5-1 can be removed from the sheet stack 5.

To determine the frequency of the oscillating rotational movement of the Blattgutaufnehmers 12, for example, proceed as follows: The stack of sheets 5 is modeled as a monolithic bar with rectangular cross-section. This bar comprises n conceptual elements, where n corresponds to the number of individual sheet items 5-1 to 5-n and a respective element corresponds to a piece of sheet material. Of these n elements are in the Fig. 1 the elements i-1, i and i + 1 are shown, which thus represent, by way of example, three superimposed sheet items 5-1, 5-2 and 5-3.

Then, from equation 1 $$M\cdot \ddot{\phi }+K\cdot \phi =0\mathrm{With}M.K\in {\mathbb{R}}^{n*n}$$

M

eine Massematrix,

K

eine Steifigkeitsmatrix,

ϕ

einen Verdrehwinkel eines Elements (Blattgutstücks um die Rotationsachse r, und

ϕ̈

die zweite zeitliche Ableitung von ϕ.

Eigen forms of this bar determines. Denoted in equation (1)

M

a mass matrix,

K

a stiffness matrix,

φ

a twist angle of an element (Blattgutstücks about the rotation axis r, and

.phi

the second time derivative of φ.

To determine the mass matrix M and the stiffness matrix K, equations of motion are set up. A respective connection between the individual mental elements is modulated as torsion springs with a stiffness c. These Stiffness c is given by the following equations 2 for a twist angle of a twisted element: $$\phi =T\cdot \frac{d}{G\cdot I_t}\to T=\frac{G\cdot I_t}{d}\cdot \phi \to c=\frac{G\cdot I_t}{d}$$

T

Torsionsmoment

G

Schubmodul

l_t

Flächenträgheitsmoment

d

Länge des Balkens

Denoted in equation (2)

T

torsional

G

shear modulus

l _t

Moment of inertia

d

Length of the bar

Wobei J eine Drehträgheit bezeichnet und für die n-te Bewegungsgleichung ergibt sich die folgende Gleichung 4: $$J_i\cdot {\ddot{\varphi }}_l+c\cdot \left({\varphi }_i-{\varphi }_{i-1}\right)=0$$

For the i-th element (piece of sheet) the equation of motion 3 results: $$J_i\cdot {\ddot{\phi }}_l+c\cdot \left({\phi }_i-{\phi }_{i+1}\right)+c\cdot \left({\phi }_i-{\phi }_{i-1}\right)=0\mathrm{With}1\le i<n$$

Where J denotes a rotational inertia and for the n-th equation of motion the following equation 4 results: $$J_i\cdot {\ddot{\phi }}_l+c\cdot \left({\phi }_i-{\phi }_{i-1}\right)=0$$

In the case of a sheet material stack with three pieces of sheet material (n = 3), the mass matrix M and the stiffness matrix K result as follows: $$\mathrm{M}=\left[\begin{array}{ccc}\mathrm{J}& \mathrm{0}& \mathrm{0}\\ \mathrm{0}& \mathrm{J}& \mathrm{0}\\ \mathrm{0}& \mathrm{0}& \mathrm{J}\end{array}\right]\mathrm{and}\mathrm{K}=\left[\begin{array}{ccc}\mathrm{2}\cdot \mathrm{c}& -\mathrm{c}& \mathrm{0}\\ -\mathrm{c}& \mathrm{2}\cdot \mathrm{c}& -\mathrm{c}\\ \mathrm{0}& -\mathrm{c}& \mathrm{c}\end{array}\right]$$

B Breite eines einzelnen Elements (Blattgutstück) 0.075 m L Länge eines einzelnen Elements (Blattgutstück) 0.15 m l_t Flächenträgheitsmoment gegen Torsion 0.0000144842 m ⁴ k Berechnungsbeiwert 0.22888542 H Höhe eines einzelnen Elements (Blattgutstück) 0.001 m J Drehträgheit 0.00000263672 kg m ² c Steifigkeit Torsionsfeder 4345.26 Nm Based on the complete description of the bar through the two matrices M and K, the eigenfrequencies can be determined with the corresponding eigenmodes described by the eigenvectors. For example, a calculation is performed with the following parameters, which are shown in the table: symbols size value unit φ _i Twist angle of the i-th element (sheet piece) n Number of superimposed elements (sheet material) 60 m Mass of a single element (sheet material) 0.001125 kg G shear modulus 300000 $\frac{N}{m^2}$

B Width of a single element (sheet material) 0075 m L Length of a single element (sheet material) 12:15 m l _t Area moment of inertia against torsion 0.0000144842 m ⁴ k calculation coefficient 0.22888542 H Height of a single element (sheet material) 0001 m J rotational inertia 0.00000263672 kg m ² c Stiffness torsion spring 4345.26 nm

On the basis of these data, it can be determined, for example by means of equation (2) and the table values, that the frequency of the oscillating rotational movement should lie at 40.595 kHz, for example, in order to remove the uppermost piece of sheet 5-1 from the sheet material stack 5, without the remaining sheet material 5 2 to 5-n are removed from the sheet material stack 5. In particular, it is possible for the frequency of the oscillating rotational movement to be determined independently of the number n of sheet items 5-1 to 5-n. Of course, the numerical values and calculation methods given above are to be understood as examples only.

In the above explanation of the device and the method for separating sheet material has always been assumed that the Blattgutaufnehmer 12 attaches to the top Blattgutstück 5-1 of the sheet material stack 5. But it is also possible that the Blattgutaufnehmer 12 attaches to the bottom sheet piece 5-n of the sheet material stack 5. In this variant, the Blattgutaufnehmer 12 is pressed onto the underside of the lowermost Blattgutstücks 5-n and also offset in said oscillating rotational movement about the rotation axis r.

List of Reference Signs / Abbreviations used

1

Device for separating sheet material

11

actuator

12

Blattgutaufnehmer

12-1

body

12-2

coating

121

coupling element

122

Up head

5

stack of sheets

5-1, ..., 5-n

Blattgutstücke

51

Surface of the top sheet piece 5-1

B

Width of a single piece of sheet

L

Length of a single piece of sheet

H

Height of a single piece of sheet

r

axis of rotation

rr

Direction of the oscillating rotational movement (direction of rotation)

R

spherical radius

P

Reference point on the rotation axis r

x

x-axis / first direction

y

y-axis / perpendicular direction

z

z-axis / second direction

Δ1

First distance

Δ2

Second distance

Claims (15)

1. A device (1) for singularizing sheet material, having an actuator (11) and a sheet-material receiver (12) coupled thereto, wherein the actuator (11) is configured for repositioning the sheet-material receiver (12), and wherein the sheet-material receiver (12) is configured for receiving an individual sheet-material piece (5-1) from a sheet-material stack (5) in which a multiplicity of sheet-material pieces (5-1, ..., 5-n) are disposed in a layered manner on top of one another along a plumb-line direction (y),
   characterized in that
   the actuator (11) is configured for setting the sheet-material receiver (12) in an oscillating rotary motion about a rotation axis (r) that lies substantially parallel with the plumb-line direction (y), so as to receive the individual sheet-material piece (5-1) from the sheet-material stack (5).
2. The device (1) as claimed in claim 1, characterized in that the sheet-material receiver (12) at the distal end thereof has a receiving head (122), and/or at the proximal end thereof has a coupling element (121) for coupling to the actuator (11).
3. The device (1) as claimed in claim 1 or 2, characterized in that the sheet-material receiver (12) in relation to the rotation axis (r) is configured so as to be rotationally symmetrical, for example so as to be substantially cylindrical.
4. The device (1) as claimed in claim 2 or 3, characterized in that the receiving head (122) has a convex, a planar, or a concave circumferential profile.
5. The device (1) as claimed in one of the preceding claims, characterized in that the actuator (11) is configured for setting the sheet-material receiver (12) in a translatory motion along a first direction (x) that lies substantially perpendicular to the plumb-line direction (y), so as to remove the received individual sheet-material piece (5-1) from the sheet-material stack (5), wherein the first direction (x) preferably lies substantially perpendicular to a longitudinal side (L) of the individual sheet-material piece (5-1).
6. The device (1) as claimed in one of the preceding claims, characterized in that the actuator (11) is configured for setting the sheet-material receiver (12) in a translatory motion along a second direction (z) that lies substantially perpendicular to the plumb-line direction (y), so as to remove the received individual sheet-material piece (5-1) from the sheet-material stack (5), wherein the second direction (y) preferably lies substantially parallel with a longitudinal side (L) of the individual sheet-material piece (5-1).
7. The device (1) as claimed in one of the preceding claims, characterized in that the actuator (11) is configured for setting the sheet-material receiver (12) in a translatory motion along the plumb-line direction (y), so as to press the sheet-material receiver (12) for receiving the individual sheet-material piece (5-1) onto a surface (51) of the individual sheet-material piece (5-1) at a specific force.
8. The device (1) as claimed in one of the preceding claims, characterized in that the oscillating rotary motion about the rotation axis (r) extends along an angular range of less than 10°, for example of approximately 1°.
9. The device (1) as claimed in one of the preceding claims, characterized in that the frequency of the oscillating rotary motion is greater than 1 kHz, for example approximately 20 kHz to 40 kHz.
10. The device (1) as claimed in one of the preceding claims, characterized in that the frequency of the oscillating rotary motion is determined so as to depend on a height (H) of the individual sheet-material piece (5-1), for example is proportional to a reciprocal value of the height (H).
11. The device (1) as claimed in one of the preceding claims, characterized in that the sheet-material receiver (12) for contacting the individual sheet-material piece (5-1) has an elastic material, for example silicone.
12. The device (1) as claimed in claim 11, characterized in that the sheet-material receiver (12) has a main body (12-1) from a first material, and a coating (12-2) applied thereto from a second material, wherein the second material contains the elastic material.
13. The device (1) as claimed in one of the preceding claims, characterized in that the sheet-material receiver (12), by virtue of the oscillating rotary motion thereof about the rotation axis (r) and by virtue of a force exerted by the actuator (11) for pressing the sheet-material receiver (12) onto a surface (51) of the individual sheet-material piece (5-1), is configured for initiating an attractive force between the sheet-material receiver (12) and the individual sheet-material piece (5-1), so as to remove the individual sheet-material piece (5-1) from the sheet-material stack (5).
14. The device (1) as claimed in one of the preceding claims, characterized in that the actuator (11) a translatory element (111) and a rotary element (112), wherein the translatory element (111) is configured for repositioning the sheet-material receiver (12) along the plumb-line direction (y), and wherein the rotary element (112) is configured for setting the sheet-material receiver (12) in said oscillating rotary motion and the rotation axis (r).
15. A method for singularizing sheet material by means of a device (1) having an actuator (11) and a sheet-material receiver (12) coupled thereto, wherein the actuator (11) is configured for repositioning the sheet-material receiver (12), and wherein the sheet-material receiver (12) is configured for receiving an individual sheet-material piece (5-1) from a sheet-material stack (5) in which a multiplicity of sheet-material pieces (5-1, ..., 5-n) are disposed in a layered manner on top of one another along a plumb-line direction (y),
    characterized in that the method comprises the following steps:

    - setting the sheet-material receiver (12) in an oscillating rotary motion about a rotation axis (r) that lies substantially parallel with the plumb-line direction (y) by means of the actuator (11), so as to receive the individual sheet-material piece (5-1) from the sheet-material stack (5).

Images