WO1993002005A2

WO1993002005A2 - Sheet material dispenser

Info

Publication number: WO1993002005A2
Application number: PCT/EP1992/001647
Authority: WO
Inventors: Peter Weigel
Original assignee: Siemens Nixdorf Informationssysteme Ag
Priority date: 1991-07-24
Filing date: 1992-07-20
Publication date: 1993-02-04
Also published as: WO1993002005A3; DE4124566C1

Abstract

A dispenser for sheet material, especially notes, consists of a storage container (14) for a stack of sheets (12), an extraction and separation device allocated to the storage container (14) with at least two extractor rollers (18) at an axial distance apart intended to bear on the sheet (22) to be extracted from the stack of sheets (22) and a swinging shaft (42) parallel to the plane of the sheets and bearing the extractor rollers (18). Said shaft consists of a tubular body, the central section of which is borne with radial clearance via a universal joint (48) on a drive shaft (20) transfixing it longitudinally and rotatably joined with it, whereby the drive shaft (20) is fitted in bearings fixed in position in relation to the storage container (14). The hollow body is adjustably guided between tines (70) of a guide fork (72) directed perpendicularly to the plane of the sheet.

Description

Sheet material dispenser

The invention relates to an output device for sheet material according to the preamble of claim 1_

From the German utility model 87 03 233 an output device for sheet material, in particular bank notes, is known, comprising a storage container for a sheet stack and a deduction and separating device assigned to the storage container with at least two intended for contact with the sheet of the sheet stack to be removed take-off rollers arranged at an axial distance from one another. The take-off rollers are rigidly connected to a take-off shaft arranged in fixed bearings, which can be driven via a clutch. The sheets are pressed against the take-off rollers by a pressure slide in the storage container. In particular, stacks of banknotes are not of the same thickness over the entire stacking area. All deformations, packaging deformations, security thread thickening and gravure embossing on the bundles of notes lead to changes in the stack thickness across the stacking surface in large stacks and thus also to uneven pressure forces on the take-off rollers. Compensating for these differences in thickness, especially in the case of large filling quantities of, for example, more than a thousand banknotes in the storage container by means of a higher pressing force, is not possible or is only possible to an inadequate extent. The entire withdrawal system only works trouble-free if the banknotes are withdrawn from the storage container in a straight and even manner.

A trigger device of the type specified in the preamble of claim 1 is known from DE-AS-18 08 272. The arrangement of the take-off rollers on the hollow shaft, which is movable in all directions, is intended to achieve a uniform transmission of the pull-off forces to the first sheet of the stack to be removed. In fact, the fact that the end face of the stack does the reasons mentioned above is not always exactly flat, so that one of the pull-off rollers comes into contact with the stack before the other and a braking torque is exerted on this roller. This means that the hollow shaft is not only adjusted parallel to the stack surface. Rather, it is also set obliquely with respect to the top edge of the sheet. As a result, a skewing moment is exerted on the sheet to be removed. In order to prevent the sheets from being pulled off at an angle, lateral sheet guides are therefore provided in the take-off device according to DE-AS-18 08 272. The invention is based on the object of designing an output device of the type specified in the preamble of claim 1 in such a way that a straight take-off of the individual sheets ensures the same even without lateral guides.

This object is achieved by the feature specified in the characterizing part of claim 1. In the solution according to the invention, not only is the pull-off force distributed uniformly to all of the pull-off rollers, as in the known solution, but also it is ensured that the individual sheets are being pulled off the stack of sheets. This also reduces consequential errors that would otherwise occur when the single sheets are transported further through processing devices, for example the transport path of an automated teller machine.

It is also no longer necessary to make such high demands on the correct arrangement of the stack of banknotes in the storage container and thus on the care of the processor. The sorting can thus also take place in a shorter time. The work involved in inserting the banknotes into the storage container is thus considerably reduced: Advantageous embodiments of the invention are specified in the subclaims.

The following description explains the invention in conjunction with the accompanying drawings using an exemplary embodiment. Show it:

FIG. 1 shows a schematic partial side view of a storage container for banknotes and the essential elements of a deduction and separating device,

FIG. 2 shows a section through the pendulum shaft with the drive shaft containing the axis in a side view,

3 shows a corresponding to Figure 2

Partial section through the universal joint on an enlarged scale and

FIG. 4 shows a schematic plan view of a groove of the bearing ball of the universal joint and of a web on the pendulum shaft which plunges into it.

FIG. 1 shows a part of a separating module, generally designated 10, which consists of a cuboid frame into which a cassette 14 containing a sheet stack 12 is inserted. In this state, a flap 16 of the cassette is opened so that take-off rollers 18 of a take-off device of the separating module 10 rest against the foremost sheet of the stack 12 contained in the cassette. The stack 12 is pretensioned in the direction of the take-off rollers 18 by a pressure device, not shown, so that the sheets of the stack 12 are always with it a certain pre-tension on the take-off rollers 18. The take-off rollers 18 are arranged in a manner which will be explained in more detail later on a drive shaft 20 which is rotatably mounted in bearings 21 fixed to the frame and which is connected to the driven side of a magnetic coupling (not shown) and can be driven in the direction of arrow B.

The take-off rollers convey the sheet 22 of the stack 12 lying against them or, if appropriate, also a plurality of sheets 22, 24 adhering to one another in the direction of a nip between transport rollers 26 and counter-rollers 28, which run on shafts 30 parallel to the drive shaft 20. 32 are arranged and can be driven in the same direction with the take-off rollers 18 in the direction of arrow B. The shaft 30 is connected to a pulley 34 and connected to the drive side of the magnetic coupling via a belt 36, so that the transport rollers 26 are driven permanently. The counter-rollers 28, on the other hand, can be driven synchronously with the take-off rollers 18 by means of a pulley 38 on their shaft 38 and a drive belt 40 from a pulley on the drive shaft 20 of the take-off rollers 18. The transport rollers 26 have the task of conveying the sheet 22 lying against them upwards through the nip, while the counter-rollers 28 are intended to prevent more than one sheet from passing through the nip between the transport rollers 26 and the counter-rollers 28.

The arrangement described so far is known from German utility model 87 03 233, to which reference is also made to further explain the mechanism. In the known arrangement, the take-off rollers 18 are rigidly attached to the drive shaft 20. In contrast for this purpose, in the solution described here, the take-off rollers 18 are arranged on a tubular pendulum shaft 42. There are three take-off rollers 18 arranged at an axial distance from one another, the middle take-off roller lying exactly in the middle between the two outer take-off rollers. The pendulum shaft 42 is divided along a plane containing the axis and has radially thickened sections 44 in the region of the take-off rollers 18. The two halves of the Pen¬ delwelle 42 are held by elastic ^rings' 46 zusammen¬ which 42 enclose the rocking shaft in the area of ra¬ dial thickened portions 44 and the Lauf¬ surfaces of the removal rollers 18 form.

The pendulum shaft 42 is mounted on the drive shaft 20 by means of a universal joint, generally designated 48. The universal joint comprises a bearing ball 50 which is fixedly connected to the drive shaft 20 and has ring-shaped bearing surfaces 52. In the present example, four axially parallel grooves 54 are formed on the surface of the bearing ball 50 (see also FIG. 3), which have a constant depth over their length.

In the area of the middle take-off roller 18 exactly in the middle between the two outer take-off rollers 42 spherical-shell-shaped bearing surfaces 56 are formed in the pendulum shaft. Bores 58 extend from the bearing surfaces 56 to both ends of the pendulum shaft 42, the diameter of which widens conically towards the free ends of the pendulum shaft 42, so that the pendulum shaft 42 moves out of its central position parallel to the axis 60 of the drive shaft 20 after each any side can be pivoted by the angle © </ 2. A torque transmission from the drive shaft 20 to the rocking shaft 42 to pivot while maintaining the encryption to enable the same, are in the ^'Be¬ area of the central drawing roller at the inner side of the rocking shaft 42 bridges 62 are provided, which engage in the grooves 54 in the bearing ball 50 , as shown in Figure 3. It also follows that, despite the torque transmission about the axis 60, the pendulum shaft 42 can pivot about an axis 64 perpendicular to the plane of the drawing. The webs 62 - viewed in a plan view of the grooves 54 (FIG. 4) - are designed in the form of a biconvex lens, so that they can each perform a pivoting movement about an axis 66 directed perpendicular to the plane of the drawing in FIG . The axes 60, 64 and 66 are mutually perpendicular to one another and thus form the axis system of the universal joint 48.

Since for a uniform distribution of the pull-off forces only a pivoting movement of the pendulum shaft 42 perpendicular to the plane of the sheet 22 to be pulled, i.e. perpendicular to the end face of the stack, the pendulum shaft 42 has at its right end in FIG. 2 a guide shoulder 68 which engages between the two legs 70 of a guide fork 72 (FIG. 1) which causes the pendulum shaft 42 to tilt is prevented about an axis perpendicular to the end face of the stack and only allows the pendulum shaft 42 to oscillate about an axis parallel to the end face of the stack. The guide fork 72 is fastened to a support 74 which is rigidly connected to the frame of the separating module 10 and which is indicated schematically in FIG.

Claims

Patent claims

1. Output device for sheet material, in particular notes of value, comprising a storage container (14) for a stack of sheets (12), a removal and singling device associated with the storage container (14) with at least two for contacting the sheet (22) to be removed in each case of the sheet stack (12) and take-off rollers (18) which are arranged at an axial distance from one another, and a pendulum shaft (42) which carries the take-off rollers (18) and is parallel to the sheet plane and which is formed by a tubular body which is in its The central section is supported by means of a universal joint (48) on a drive shaft (20) passing through it in the longitudinal direction with radial play and is connected to it in a rotationally fixed manner, the drive shaft (20) being mounted in bearings which are stationary relative to the storage container (14) is characterized by the fact that the hollow body is adjustable between legs (70) of a guide fork (72) directed perpendicular to the sheet plane ar is led.

2. Output device according to claim ¹ , characterized ge indicates that the inner diameter of the hollow body starting from the universal joint _. (48) continuously enlarged in both axial directions outwards.

3. Output device according to claim 1 or ² , characterized in that the universal joint (48) comprises a bearing shaft (50) fixedly connected to the drive shaft (20), in the surface of which axially parallel grooves (54) are formed, and in that the hollow body of the bearing ball (50) has associated spherical-shell-shaped bearing surfaces (56), in the area of which pins (62) are arranged, each with an outer surface curved around its longitudinal axis, for engagement in the grooves (54) of the bearing ball (50).

4. trigger device according to one of claims l to

3, characterized in that three take-off rollers (18) are provided, the middle take-off roller being arranged symmetrically with respect to the pendulum axis.

5. Output device according to one of claims 1 to

4, characterized in that the hollow body forming the pendulum shaft (42) is divided into two halves with a parting plane containing the shaft axis, which are held together by the elastic surfaces (46) forming the running surfaces of the pressure rollers (18).