Abstract:
In the case of an apparatus for transporting banknotes, within an automated teller machine, between at least one banknote cassette, for storing banknotes which are to be dispensed, and a dispensing location or between the latter and a receiving container for banknotes which have been drawn back, comprising a bundle-transporting section which is located between the dispensing location and a collecting location, at which banknotes which have been removed individually from the banknote cassette are collected into a bundle, and has two belt drives, a bundle of banknotes being gripped, and transported, between the mutually parallel endless belts of the belt drives, said endless belts circulating in the same direction in each case over a drive roller, and also has a drive arrangement for driving the belt drives, characterized in that the belt drives can be driven at different speeds at least in the direction from the dispensing location to the receiving container.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
       [0001]     This application is entitled to the benefit of and incorporates by reference essential subject matter disclosed in International Application No. PCT/DE01/04551 filed on Dec. 4, 2001 and German Patent Application No. 10103120.3 filed on Jan. 24, 2001. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The invention relates to an apparatus for transporting banknotes, within an automated teller machine, between at least one banknote cassette, for storing banknotes which are to be dispensed, and a dispensing location or between the latter and a receiving container for banknotes which have been drawn back, comprising a bundle-transporting section which is located between the dispensing location and a collecting location, at which banknotes which have been removed individually from the banknote cassette are collected into a bundle, and has two belt drives, a bundle of banknotes being gripped, and transported, between the mutually parallel endless belts of the belt drives, said endless belts circulating in the same direction in each case over a drive roller, and also has a drive arrangement for driving the belt drives.  
       BACKGROUND OF THE INVENTION  
       [0003]     It is usually by means of the bundle conveyor or dispensing conveyor that the bundle of banknotes, bundled in the collecting location, is transported with aligned edges to the dispensing location, where it can be removed by the customer. In special cases, however, the bundle of banknotes has to be conveyed back again from the dispensing opening to a so-called reject cassette if the customer, for example, has forgotten to remove the money or if an incorrect number of notes has been established before the bundle of banknotes is dispensed. It is also necessary here, if appropriate, for relatively thick bundles of stiff banknotes to be deflected, via a diverter, over a narrow radius into the reject cassette. The opening in the reject cassette has to be capable of being reliably closed, in order to be transported, and is relatively narrow on account of the compressed construction of the reject cassette. Moreover, the drawing-in rollers have a small diameter on account of the compressed construction of the reject cassette, with the result that they can only draw in a bundle of limited thickness. Problems thus arise if a bundle of banknotes which form a stiff block is to be deflected in narrow space conditions and drawn into the reject cassette.  
         [0004]     The object of the invention is to design an apparatus of the type mentioned in the introduction such that even relatively thick and stiff bundles of banknotes can easily be drawn into the reject cassette through a narrow opening.  
       SUMMARY OF THE INVENTION  
       [0005]     This object is achieved according to the invention in that the belt drives can be driven at different speeds at least in the direction from the dispensing location to the receiving container.  
         [0006]     If the two belt drives, which interact in order to transport the bundle of banknotes, are driven at different speeds in the manner proposed according to the invention, then the bundle of banknotes if fanned out. That is to say, whereas, during transportation of the banknotes to the dispensing location, the two belt drives run at exactly the same speed, in order for the banknotes to be supplied to the customer in an edge-aligned bundle in the dispensing compartment, the bundle is fanned out as it is transported back, as a result of which it becomes thinner and considerably more flexible and can easily be bent around relatively small radii. The fanning-out may be enhanced as desired over a given length by the bundle being moved back and forth a number of times.  
         [0007]     Different drive speeds of the two belt drives can be achieved in that the drive arrangement, for each belt drive, has a dedicated motor, of which at least one can be controlled in terms of speed.  
         [0008]     It is also possible, however, for the drive arrangement, as has been the case up until now, to manage with one motor, in that one of the two belt drives can be coupled to the motor in one transporting direction via a first gear train and in the other transporting direction via a second gear train with a different transmission from the first gear train.  
         [0009]     In the case of one practical embodiment of this solution, the drive roller of a first belt drive and a parallel intermediate shaft are coupled in a rotationally fixed manner to the motor, while the drive roller of the second belt drive is in torque-transmitting connection with the first drive roller via a first one-way clutch and with the intermediate shaft via a second one-way clutch, of which the direction of action is oriented counter to that first one-way clutch. The one-way clutches may be configured in different ways. For example, it is possible for one of the one-way clutches to be a latching freewheel or clamping-body freewheel and for the other one-way clutch to be a slip clutch which, in one direction, allows torque transmission and, in the other direction, prevents blocking of the gear mechanism if there is contact between two gear elements at different rotational speeds. The act of the differential speed being taken up by a slip clutch, however, obviously subjects the drive motor to loading. If this is not desirable, it is also possible for the one-way clutches to be formed by vibratory-spring clutches which act in different directions. The vibratory-spring clutches tighten in the respective direction of rotation on the shaft on which they are seated or wind up in order to interrupt the torque transmission. The vibratory springs are usually controlled via a friction clutch with a low torque.  
         [0010]     The bundle-transporting section can easily be coupled to a further transporting section comprising two belt drives, an endless belt of one belt drive being guided over the first drive roller and the endless belt of the second belt drive being guided over a drive roller which is seated on the intermediate shaft. Since the first drive roller and the intermediate shaft are always driven at the same rotational speed, it is also the case that the two belt drives of this second transporting section run at the same speed, with the result that, on this second transporting section, the bundle of banknotes is always transported in the form in which it has passed into the second transporting section, that is to say either with the edges of the banknotes aligned or in fanned-out form. The second transporting section can connect the bundle-transporting section to the collecting location and, via a diverter, to the receiving container. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0011]     Further features and advantages of the invention can be gathered from the following description, which explains the invention, with reference to an exemplary embodiment, in conjunction with the attached drawings, in which:  
         [0012]      FIG. 1  shows a schematic side view of an automatic teller machine,  
         [0013]      FIG. 2  shows a partly schematic plan view of a transporting unit, which forms the bundle-transporting section, as a bundle of aligned banknotes is transported in the direction of the dispensing compartment,  
         [0014]      FIG. 3  shows a view corresponding to  FIG. 2  as a bundle of banknotes is fanned out as it is transported in the opposite transporting direction,  
         [0015]      FIG. 4  shows a schematic side view of the transporting unit illustrated in  FIG. 2 , taken along line IV-IV in  FIG. 2 , for the purpose of explaining a first gear train, and  
         [0016]      FIG. 5  shows a schematic section along line V-V in  FIG. 3 , for the purpose of explaining the other gear train. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0017]      FIG. 1  shows an automatic teller machine  10 , which is illustrated in a highly schematic and simplified form, with a housing  12 . Located in the bottom part of the housing, which is designed as a safe  14 , are two banknote cassettes  16 , for accommodating banknotes which are to be dispensed, and a reject cassette  18 , for accommodating banknotes which, although supplied for dispensing purposes, have not, for whatever reason, reached the customer. Each banknote cassette  16  is assigned a separating mechanism  20 , in order for the banknotes to be withdrawn separately from the banknote cassette  16  and fed to a collecting conveyor  22  which extends in the vertical direction past the banknote cassettes  16  and goes as far as a collecting location  24 , where the banknotes which have been withdrawn individually from the banknote cassettes  16  are collected into a bundle. The resulting bundle of banknotes is then received by a further vertical transporting section  26 , which conveys the bundle, through an opening  28  in the top surface  30  of the safe  14 , to a dispensing conveyor  32 , which then transports the bundle of banknotes as far as a dispensing compartment  34  in the operating unit  36  of the automated teller machine  10 .  
         [0018]     If the customer does not remove the bundle of banknotes supplied from the dispensing compartment  34 , or if it is established, before the bundle of banknotes is dispensed, that the values of the banknotes in the bundle are not correct or the number of banknotes in the bundle is incorrect, the bundle of banknotes is transported back again by the dispensing conveyor  32 , transferred to the vertical conveyor  26  and transported by the latter, via a diverter  38 , to the reject cassette  18 , which is assigned a drawing-in mechanism  40  in order for the bundle of banknotes to be pushed into the reject cassette  18 .  
         [0019]     As has been explained in the introduction, it is difficult for the compact bundle of banknotes, which, in particular in the case of relatively new, stiff banknotes, behaves like a stiff block with little flexibility, to be deflected around relatively small radii in the diverter and drawn in through the narrow opening of the reject cassette  18 . The bundle of banknotes is thus fanned out as it is transported back in the dispensing conveyor  32 . A design of the dispensing conveyor  32  which is suitable for this purpose will now be explained in more detail hereinbelow with reference to FIGS.  2  to  5 .  
         [0020]     The dispensing conveyor  32  has a bearing frame  42  with two frame walls  44 ,  46  which are parallel to one another. A top belt drive  48  and a bottom belt drive  50  are arranged between the frame walls  44  and  46 . The top belt drive  48  comprises two endless belts  52 , which each run over a roller  54 , which is seated in a rotationally fixed manner on a drive shaft  56  mounted in the frame walls  44  and  46 , and a roller  58 , which is mounted in a freely rotatable manner on a shaft  60  mounted in the frame walls  44  and  46 .  
         [0021]     The bottom belt drive  50  comprises two endless belts  62 , which each run over a roller  64 , which is seated in a rotationally fixed manner on a drive shaft  66  mounted in the frame walls  44  and  46 , and a roller  68 , which is mounted in a freely rotatable manner on a shaft  70  mounted in the frame walls  44  and  46 . The bottom strands of the endless belt  62  of the top belt drive  48  interact with the top strands of the endless belts  62  of the bottom belt drive  50  in order to transport a bundle of banknotes, as can be seen in  FIGS. 4 and 5 .  
         [0022]     Arranged in a rotationally fixed manner on the drive shaft  66 , coaxially with the rollers  64 , are two further rollers  72 , over which in each case one endless belt  74  runs. The two endless belts  74  form a belt drive of the banknote-transporting section  26  and interact with a further belt drive, that is to say two further endless belts  76  each running over a top deflecting roller  78 , these, for their part, being seated in a rotationally fixed manner in each case on an intermediate shaft  80  mounted in the frame walls  44  and  46 . As can be seen by comparing  FIGS. 2 and 3 , on the one hand, and  FIGS. 4 and 5 , on the other hand, the banknotes guided between the endless belts  74  and  76  are transferred to the belt drive  48  and  50 . It is likewise possible for transfer to take place in the opposite direction.  
         [0023]     In order to avoid sagging of the endless  52  and  62  of the horizontal dispensing conveyor, the top strands of the endless belts  62  of the bottom belt drive  50  run over a supporting roller or supporting rollers  82 , which are likewise seated on a shaft  84  mounted in the frame walls  44  and  46 , as  FIGS. 4 and 5  show.  
         [0024]     The belt drives of the dispensing conveyor  32  and of the vertical conveyor  26  are driven via a motor  86 , which is arranged on the inside of the frame wall  44  and of which the drive wheel  88 , which is located on the outside of the frame wall  44 , drives, via a driving belt  90 , a driving wheel  92  which is seated in a rotationally fixed manner on the drive shaft  66 . That end of the drive shaft  66  which is opposite to the driving wheel  92 , and projects out of the frame wall  46 , bears a first gearwheel  94 . The latter engages with a first intermediate gearwheel  96 , which is mounted on the frame wall  46  and, for its part, drives a second intermediate gearwheel  98  mounted on the frame wall  46 . The intermediate gearwheel  98 , for its part, engages with a second gearwheel  100 , which is connected in a rotationally fixed manner to the intermediate shaft  80 , and also with a third gearwheel  102 , which can be coupled to the drive shaft  56  via a first one-way clutch  104  in the form of a latching freewheel.  
         [0025]     Seated in a rotationally fixed manner on an end of the drive shaft  56  which projects beyond the frame wall  44  is a fourth gearwheel  106 , which, via a third intermediate gearwheel  108  mounted on the frame wall  44 , drives a fifth gearwheel  110 , which can be coupled to the intermediate shaft  80  via a second one-way clutch  112 , which is designed as a slip clutch. The slip clutch comprises a brake disk  114  which is connected in a rotationally fixed manner to the intermediate shaft  80  and against which the gearwheel  110 , which bears a brake lining  116 , is braced by a helical compression spring  118 .  
         [0026]     The above description shows that the drive shaft  66  of the bottom belt drive  50  and the intermediate shaft  80  are driven, via the intermediate gearwheels  96  and  98 , in the two directions of rotation together at the rotational speed determined by the speed of the motor and the transmission ratios. The drive shaft  56  of the top drive belt  48 , in contrast, is driven in one direction of rotation, in which the latching clutch  104  engages and can thus transmit a torque from the gearwheel  102  to the drive shaft  56 , via the gear train formed the gearwheel  94 , the intermediate gearwheels  96  and  98 , the gearwheel  102  and the one-way clutch  104 . If there is a difference here between the rotational speed of the intermediate shaft  80  and the gearwheel  110 , this being driven, via the intermediate gearwheel  108 , by the gearwheel  106  seated on the drive shaft  56 , then this difference is taken up by the slip clutch  112 .  
         [0027]     In the opposite direction of rotation, in which the one-way clutch  104  does not engage and thus no torque can be transmitted from the gearwheel  102  to the drive shaft  56 , the drive shaft  56  is driven via the gear train formed by the gearwheel  94 , the intermediate gearwheels  96  and  98 , the gearwheel  100 , the intermediate shaft  80 , the slip clutch  112 , the gearwheel  110 , the intermediate gearwheel  108  and the gearwheel  106 .  
         [0028]     For transporting in the forward direction, which is illustrated in  FIGS. 2 and 4  and in the case of which a bundle of banknotes is to be transported, with the edges aligned, in the direction of the arrow A to the dispensing compartment  34  of the automated teller machine  10 , the endless belts  52  of the top belt drive  48  and the endless belts  62  of the bottom belt drive  50  have to circulate at exactly the same speed. If in contrast, according to  FIGS. 3 and 5 , the bundle of banknotes is transported away from the dispensing compartment  34  in the direction of the reject cassette  18 , then it is to be fanned out, according to the invention, by the endless belts  52  of the top belt drive  48  circulating, in the direction of the arrow B, at a higher speed than the endless belts  62  of the bottom belt drive  50 .  
         [0029]     The transmission ratios in the second gear train are selected such that the drive shaft  56  of the top belt drive  48  circulates at a higher speed than the drive shaft  66  of the bottom belt drive  50 . In the first gear train, in contrast, the transmission ratios are selected such that the drive shafts  56  and  66  rotate at the same rotational speed. The one-way clutch  104 , then, is designed such that when the bundle of banknotes returns, i.e. runs in the direction specified by the arrows B, the freewheel of the one-way clutch  104  takes effect, with the result that the drive shaft  56  of the top belt drive  48  is rotated at the higher rotational speed predetermined by the second gear train. In the forward direction, specified by the arrows A, in contrast, the one-way clutch  104  takes effect and ensures a torque-transmitting connection between the gearwheel  102  and the drive shaft  56 . Since the rotational speed of the drive shaft  56  which is produced by the first gear train is lower than the rotational speed produced via the second gear train, there is braking of the drive shaft  56  by the one-way clutch  104  in forward-movement mode. The difference in rotational speed between the two gear trains is taken up by the slip clutch  112 .  
         [0030]     By virtue of the belt drives  48  and  50  circulating at different speeds, the individual banknotes of the bundle of banknotes are displaced in relation to one another in the running direction, i.e. the bundle is fanned out. The bundle as a whole thus becomes thinner and more flexible, with the result that it can be deflected more easily. This fanning-out can be enhanced by the drive direction being changed a number of times, as long as the bundle as a whole remains within the transporting section defined by the belt drives  48  and  50 .