Stack transport device

Abstract: The invention relates to a stack transport device for transporting a stack of bank notes (14) through a large angle, such as 90 degrees, without shearing. The device comprises belt means (10,10',12 and 12') driven at identical speeds; a pivoted support means (26) over which the belt means (10,10',12 and 12') pass; and drive means (38) to pivot the support means (26) through said angle, when the stack (14) is supported by a portion of said belt means (10, 12) which is in turn supported by said support means (26).

Description: This invention relates to a device for transporting a stack of media, such as bank notes or other paper sheets, through a substantial angle, such as 90 degrees. If a stack of bank notes is to be transported from one location to another, it is highly preferable that the stack retain its integrity. Such transport conveniently takes place using two pairs of cooperating drive belts, the two pairs of drive belts being located close to opposing edges of the notes forming the stack, with the stack being held between them. If the stack is to be moved through a substantial angle, there is a risk that the stack will suffer shear separation with one or more notes being displaced with respect to adjacent notes, unless the angular movement is achieved through a series of small steps, i.e. the angle of the pairs of belts is changed around a large radius of curvature. One device requiring transport of a stack of bank notes is a teller assist device for use, say in a bank, to supply stacks of notes to a teller, under secure conditions. Such devices are commonly arranged under the desks or counters at which tellers are seated. Consequently, space is limited and notes, once picked from the currency storage cassettes in which they are stored, should ideally be transported vertically prior to being moved through an angle of approximately 90°, to be presented to the teller, through a slot in the front face of the teller assist device. It has been found that if drive belts are used to give a sharp 90 degree rotation, say by passage over a roller, the integrity of the stack of notes can be lost, either by severe displacement of the notes relative to each other, or by displacement of a number of notes in the centre of the stack. DE-A-3 424 389 describes a stack transporting device as defined in the preamble of claim 1. GB-A-2 126 998 describes a device for transporting sets of sheets of paper. The device includes a set of rollers, including a sun roller, and an arcuate guide means which work together to convey the set of sheets of paper from a first direction to a second direction. It is an object of the present invention to provide a device for transporting a stack of bank notes, or other sheets, through a substantial angle while retaining the integrity of the stack. According to the present invention there is provided a stack transport device including belt means for holding and feeding a stack of sheets along a feed path from an entry point to an exit point, the exit direction of feed of said stack approaching said exit point being at an angle to the entry direction of feed leaving said entry point, pivotably mounted support means for supporting a portion of said belt means intermediate said entry and exit points, characterized by control means arranged to cause said support means to pivot between a first position and a second position while said stack is held by said portion of said belt means, said portion of said belt means being substantially aligned with said entry direction of feed when said support means is in said first position and being substantially aligned with said exit direction of feed when said support means is in said second position. An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:- Fig. 1A is a schematic side view of a transport device in accordance with the present invention, illustrating the pivotable support means in a first position, with the support means awaiting receipt of a stack of notes supported by a portion of the belt means; Fig. 1B is a schematic side view of the transport device of Fig. 1A, taken from the opposite side of the device; Fig. 2 is a schematic side view of the device of Fig. 1A, in which said support means has received said portion of said drive belt means supporting the stack; Fig. 3 is a schematic side view of the device of Fig. 1A, in which the support means has moved to a second position, with the stack still held by said portion of said drive belt means; Fig. 4 is an enlarged view of the support means, together with associated parts of the drive belt means, the view being taken from right to left with reference to Fig. 1A; and Fig. 5 is a block diagram of parts of the device of Fig.1A. Figs 1 to 4 illustrate a stack transport device in accordance with the present invention. The device incorporates a support means 26 including two parallel side plates 28 and 28' which are connected by two support rods 29 and 31 and by a pivot rod 34, as illustrated in Fig. 4. The first support rod 29 has mounted thereon two idler rollers 30 and 30', separated by a distance slightly less than the approximate width of the bank notes to be transported by the device. This distance can be adjusted for different currencies or for different types of sheets by moving the rollers 30 and 30' along the support rod 29. The second support rod 31 has a further two similarly positioned idler rollers 32 and 32' mounted thereon. The pivot rod 34 is pivotably mounted with respect to a framework 35 of the device and is connected to a gear mechanism 33, which is in turn connected to a stepping motor 38 (Fig. 5) which rotates the support means 26 when in use, as will be discussed in detail below. The support means 26 is positioned substantially at the apex of a triangle the base corners of which are formed by two drive rollers 16 and 16' and two idler rollers 20 and 20'(Fig. 1A & 1B) rotatably mounted with respect to the framework 35. A first endless drive belt 10 is passed over the aforementioned rollers 16 and 20 and the first two idler rollers 30 and 32 on the support means 26, as illustrated in Fig. 1A. A second endless drive belt 10' is also passed over the second set of corresponding rollers 16', 20', 30' and 32', as illustrated in Fig. 1B. A third endless drive belt 12 is passed over a further drive roller 18 and idler roller 22 and a second idler roller 24 located remote from the support means 26, (Figs 1A, 2 and 3). Again, a further drive belt 12' is passed over the corresponding rollers 18', 22' and 24'(Fig. 1B). Thus the drive belts 10, 12 and 10', 12' are located adjacent each other so as to be urged towards and support a stack 14 of notes located between the belts. Consequently, the drive belts form a feed path along which a stack 14 of notes can be transported by controlled movement of the drive belts 10, 10',12 and 12'. It will be appreciated that the idler rollers 30, 30' and 32, 32' included in the support means 26 support a portion of the cooperating belts 10, 10' and 12, 12' intermediate the entry point (location of rollers 16, 18') and exit point (location of rollers 20, 22 and 20', 22') of the stack transport device. The support means 26 is associated with a sensor 36 arranged to detect the presence of a stack 14 of notes; the sensor 36 is connected to a control means 37, in the form of a processor, which is in turn connected to the stepping motor 38 which moves the support means 26 on the pivot 34. The belts 10, 12 and 10', 12' travel in the direction shown by the arrow A (Fig. 1A), under the influence of a drive motor 19 (Fig. 5) which drives the drive rollers 16, 16', 18 and 18', at identical speeds, through a gear mechanism (not shown). The drive motor 19 is also controlled by the control means 37. After the stack 14 of notes has entered the transport device, the belts 10, 12 and 10', 12' hold the stack 14 of notes between them and feed the stack 14 towards the support 26, the portion of the cooperating belts 10, 10' and 12, 12' supported by the idler rollers 30, 30' and 32, 32' of the support means 26 being substantially aligned with the initial direction of feed of the stack 14 in the transport device (indicated in Fig. 1A by arrow A). As the leading edge of the stack 14 passes the sensor 36, its presence is detected, and the sensor 36 sends a signal to the control means 37 which operates the stepping motor 38 to rotate the support means 26 through 90 degrees about the pivot 34 to the position shown in Fig. 3. The delay between the signal produced by the sensor 36 being received by the control means 37 and the control means 37 instructing the drive means 38 to pivot the support means from the first to the second position, is determined by the control software in the control means 37 and can be altered as required. When the support means 26 commences its pivoted movement from its first position shown in Fig. 2, the stack 14 is held by the aforementioned portion of the cooperating belts 10, 10' and 12, 12' with the stack 14 being centrally positioned between the rollers 30, 30' and 32, 32'. During this pivotal movement the belts 10, 10' and 12, 12' continue to be driven at the same speed. The speed of rotation of the support means 26 is such that when the support means 26 reaches its second position shown in Fig. 3 the stack 14 is still centrally positioned with respect to the rollers 30, 30' and 32, 32'. After the support means 26 reaches its second position, the belts 10, 10' and 12, 12' feed the stack 14 towards the exit point of the transport device, the aforementioned portion of the belts 10, 10' and 12, 12' being substantially aligned at this time with the exit direction of feed of the stack 14 (indicated by the arrow B in Fig.3). It will be clear from Figs 2 and 3 that as the support means 26 pivots, no shearing forces are applied by the drive belts 10, 10'; 12 and 12' to the stack 14. The stack 14 therefore retains its integrity. The intact stack 14 can then be passed between the idler rollers 20, 22 and 20', 22'. It should be understood that each pair of rollers; 16, 18; 16', 18'; 20, 22; and 20', 22' are spring mounted to permit the stack 14 to pass between them as it enters and leaves the transport device, while urging the belts into contact with the stack 14 of notes, when in use. On leaving the support means 26 the stack 14 is transported by additional belt means (not shown) to a delivery position where it can be collected by a bank teller. On delivery, the stack is easy to handle manually, and appears neat, which gives the teller more confidence that the stack contains the correct number of notes. Comparison of Figs 2 and 3 will also show that the spacing between the pivot 34 and the idler roller 24 is constant, but the distances between the idler roller 24 and the idler rollers 30, 32 respectively on the pivoted support means 26 change as the support means 26 pivots. Preferably the belts 10, 10', 12 and 12' are made of an elastic material such as rubber to accommodate any slight length changes during pivoting of the support means 26. The device can also incorporate a known belt tensioning device to keep the belts tensioned during the pivoting motion. The stepper motor 38 is arranged to rotate the support 26 on the pivot 36 back through 90 degrees to the position shown in Fig. 1A after the stack 14 of notes is transported away from the support means 26, by additional drive belts (not shown). The transport device according to the invention is sufficiently compact to be provided in a confined space, e.g. under a Bank counter or teller's desk, and to transport bank notes through 90 degrees within this space. The device may also be provided as a module which can be incorporated into other media transportation mechanism, such as that used in automated teller machines (ATMs). While the invention has been described with reference to the transport of a stack of bank notes through 90 degrees, it may be used to transport stacks of notes through other large angles, and to transport stacks of sheets other than bank notes. Also an additional pair of belts may be positioned centrally in the device between the existing pairs of belts 10,12 and 10', 12' to provide additional support to the stack 14 during transportation.

Claims: A stack transport device including belt means (10,10',12 and 12') for holding and feeding a stack of sheets (14) along a feed path from an entry point to an exit point, the exit direction of feed of said stack approaching said exit point being at an angle to the entry direction of feed leaving said entry point, and pivotably mounted support means (26) for supporting a portion of said belt means (10,10',12 and 12') intermediate said entry and exit points, characterized by control means (37, 38) arranged to cause said support means to pivot between a first position and a second position while said stack (14) is held by said portion of said belt means, said portion of said belt means (10, 10', 12 and 12') being substantially aligned with said entry direction of feed when said support means (26) is in said first position and being substantially aligned with said exit direction of feed when said support means is in said second position. A stack transport device according to claim 1, characterized in that said belt means (10, 10',12 and 12') include first belts (10, 10') and second belts (12, 12') between which said stack (14) is held in operation, and in that there is provided a drive motor (19) arranged to drive said first and second belts (10, 10', 12 and 12') at identical speeds. A stack transport device according to claim 2, characterized in that said first and second belts (10,10',12 and 12') are formed by two pairs of belts (10, 12 and 10', 12'), which are arranged respectively to grip the stack (14) adjacent opposite edges thereof, when in use. A stack transport device according to claim 4, characterized in that the belts of each pair (e.g. 10,12) pairs around respective pairs of rollers (e.g. 16, 18; 20, 22') which are biased towards each other. A stack transport device according to any one of the preceding claims, characterized by sensor means (36) arranged to detect the presence of said stack (14) in said support means (26) and to supply a corresponding signal to the control means (37, 38) which in turn pivots said support means (26) from said first to said second position. A stack transport device according to claim 5, characterized in that said control means (37, 38) pivots said support means (26) back to said first position after the sensor means (36) detects that the drive belts (10, 10', 12 and 12') have transported the stack (14) from said support means (26), in said second position. A stack transport device according to any one of the preceding claims, characterized by idler rollers (30, 30', 32 and 32'), included in said support means (26) and adapted to support said portion of said drive belt means (10, 10', 12 and 12'), each of said rollers being located adjacent a corner of said support means (26). A stack transport device according to any one of the preceding claims, characterized in that said control means (37, 38) control the speed of pivotal movement of said support means (26) so that said stack (14) is in the same position relative to said support means (26) at the beginning and at the end of said pivotal movement from said first to said second position.

Inventors: LOGIE ALEXANDER WILLIAM, LOGIE, ALEXANDER WILLIAM
Applicants: NCR INT INC, NCR INTERNATIONAL, INC.
Application year: 1996
Main classification: B65H29
IPC codes: G07D9, B65H29, B65H5