Abstract:
An automated teller machine (ATM) dispenses currency through a delivery port. Two opposing belts form a clamping unit during normal operation. Currency is clamped between the belts and the belts are rotated in a forward direction to deliver currency to the discharge port. If there is a problem with the delivery of the currency during dispensing, or a person fails to take money which has been delivered, the transportation unit pivots to change the delivery path and the belts move in a reverse direction to transport the currency to a storage area within the ATM.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a paper handling mechanism and more particularly to a mechanism for conveying, discharging and recovering sheets of paper which have been fed from another portion and stacked on a tray, e.g. a mechanism in a paper-money dispensing machine (ATM) which conveys paper money to a delivery port in accordance with a command for pull back and recovery of paper money to its interior. 
     DESCRIPTION OF THE RELATED ART 
     Conventional dispensing mechanisms are known which use a fixed tray on which paper is stacked, as disclosed in Japanese Utility Model Laid-Open No. 126296/75, or which use a tilting tray, as disclosed in Japanese Patent Application No. 127605/83. The former is shown in FIG. 4 which recovers paper 14 which has been rejected from a delivery port 50. Selection belts 54 and 55 which clamp the paper 14 are moved in the direction of arrow A, thereby allowing the paper 14 to be discharged into a recovery box 56 located below the belts. In the latter mechanism, as shown in FIG. 5, a tray 61 is tilted about a pivot shaft 62, whereby the paper 14 is discharged into a recovery box 64 through a discharge belt 63. 
     In the former conventional mechanism referred to above, a conveyance path for the paper 14 has a front-stage conveyance path consisting of a push-in belt 52 and a receiving belt 53 and a rearstage conveyance path consisting of the selection belts 54 and 55. However, a large space is required for moving the selection belts 54 and 55 in the foregoing manner. Problems are also encountered in the latter conventional mechanism referred in above. The paper conveyance to the latter device is unstable because nothing is used to hold and restrain the paper 14 on the tray 61, and a special recovering mechanism is required because the paper discharge angle and direction are limited, resulting in the lack of design versatility. 
     OBJECT OF THE INVENTION 
     It is the object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a paper conveying, discharging and recovering mechanism which is compact and highly versatile in its layout, e.g. layout, of a paper recovery box. 
     SUMMARY OF THE INVENTION 
     The above object is attained by a paper conveying, discharging and recovering mechanism according to the present invention which clamps between opposing belts, sheets of paper that have been stacked on a tray through another conveyor, conveys the sheets of paper forward or reverse while maintaining the clamped state while and can tilt the belts as a unit while clamping the sheets of paper on the tray in a plurality of stop positions. 
     According to the present invention, since the recovery box mounting position is not limited by the paper discharging direction, the space occupied by the mechanism can be reduced, and because of a simplified recovery path, it is possible to reduce the size of the mechanism. Moreover, since it is possible to select a recovery method suitable for the paper conveying, discharging and recovering mechanism of the present invention, it is possible to construct this mechanism so as to have a module structure modular structure, making it economically feasible. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a side view of a principal portion of a paper conveying, discharging and recovering mechanism according to an embodiment of the present invention; 
     FIG. 2 is a view as seen in the direction of arrow F in FIG. 1; 
     FIGS. 3(a)-(d) are diagrams showing operating conditions in accordance with an operation procedure in the embodiment of FIG. 1; 
     FIGS. 4 and 5 are schematic construction diagrams of conventional mechanisms; 
     FIG. 6 is a diagram showing an entire arrangement of the paper conveying, discharging and recovering mechanism embodying the present invention; and 
     FIGS. 7(a)-(e) are diagrams showing operating conditions in accordance with an operation procedure in another embodiment of the present invention. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     An embodiment of the present invention will now be described with reference to the drawings. FIG. 6 illustrates a mechanism for conveying, discharging and recovering paper 14, e.g. currency, according to an embodiment of the present invention. In the same figure, the numeral 23 denotes a storage box of 10,000-yen notes for example, while the numeral 24 denotes a storage box of 1,000-yen notes for example. The type of currency designated by a command signal is conveyed by a conveyor belt 13 and stacked on a tray 1. The numerals 21 and 22 denote a currency handling apparatus and a conveying, discharging and recovering portion, respectively. 
     FIG. 1 is a side view showing the details of a principal portion of the conveying, discharging and recovering mechanism shown in FIG. 6, and FIG. 2 is a view of the mechanism as seen in the direction of arrow F of FIG. 1 excluding delivery port 12. In the state illustrated therein, the paper 14 conveyed by the conveyor belt 13 has been received onto the tray 1. A presser 2 is mounted pivotably about a shaft 7 and is rotated by a motor 5 through gears 11d and 11e. Since the shaft 7 is held by the tray 1, the presser member 2 can maintain its positional relation with the tray. The tray 1 and the presser member 2 are provided with discharging and recovering belts 10a, 10b, respectively. Upon closing of the presser member 2, sheets of paper 14 stacked on the tray are clamped, discharged and recovered by the belts 10a and 10b. A motor 4 is fixed to the tray 1 and the driving force from this motor is transmitted to the belt 10a through gears 11a, 11b and 11c. The belt 10b is interlocked with the belt 10a. A motor 3 is rotates shaft 6 through gears 11f and 11g. With this rotation, the tray 1 tilts. The thickness of the sheets of paper 14 stacked on the tray 1 varies depending on the number of sheets of paper, but this causes variations in the paper clamping force of the belts when the presser member 2 closes and clamps the sheets of paper 14. To prevent this, a tension roller 9a is disposed on the belt 10b of the presser member 2. The tension roller 9a is attached to a tension plate 8 together with a tension roller 9b so as to be rotatable about the shaft 7, and is forced downwards by a spring (not shown) to apply tension to the belt 10b. When the presser member 2 closes and clamps the sheets of paper 14, the amount of upward movement of the tension roller 9a varies depending on the thickness of the sheets of paper stacked. But at this time, the tension roller 9b, which is above the tension roller 9a, prevents loosening of the belt 10b. When the stacking of the sheets of paper 14 is in the state of FIG. 1, the presser member 2 turns in the direction of arrow P by the operation of the motor 5 and clamps the sheets of paper 14. This state is as shown in FIG. 3(a). At this time, if the motor 4 rotates in the forward direction, the belts 10a and 10b move in the direction of arrow R of FIG. 3a through the gears 11a, 11b and 11c, whereby the sheets of paper 14 are conveyed up to a delivery port 12, as in FIG. 3(b). If the user should forget to take the sheets of paper 14, the motor 4 rotates in the reverse direction, so that the belts 10a and 10b are moved in the direction of arrow L, whereby the sheets of paper 14 are conveyed reversely up to the position thereof shown in FIG. 3(a). Then, the motor 3 rotates in the forward direction to turn the tray 1 counterclockwise about the shaft 6 and stops in the position of FIG. 3(d). In this state, by rotating the motor 4 in the reverse direction, the sheets of paper 14 which the user forgets to take are received into a recovery box 15. When the recovery is over, the motor 3 rotates in the reverse direction to move the tray 1 back to the position shown in FIG. 3(a), then the motor 5 rotates in the reverse direction, so that the apparatus reverts to the state of waiting for stacking of sheets of paper 14, as shown in FIG. 1. If any trouble should occur with the sheets of paper 14 fed by the conveyor belt 13 due to the stacked feed thereof, the presser member 2 closes and clamps the sheets of paper 14. At the same time, the motor 3 rotates in the forward direction at once to turn the tray 1 counterclockwise up to its position shown in FIG. 3(c), then the motor 4 is rotated in the reverse direction to receive the sheets of paper 14 in a recovery box 16. After the end of the recovery, the tray 1 is moved back to its position shown in FIG. 3(a), and the motor 5 rotates in the reverse direction, so that the apparatus reverts to its state shown in FIG. 1. 
     According to this embodiment, an increase is attained in both the degree of freedom of the paper discharging direction and that of the position where the recovered paper storage portion is to be disposed, and it is not necessary to provide a special recovery path, thus reducing the size of the apparatus. It is also possible to construct the apparatus so that when it is necessary to send the paper 14 into either recovery box 15 or 16 after the paper has reached the paper delivery port 12, the tray 1 is tilted immediately for recovery of the paper. In this case, there is no fear of damage to the paper 14 at the time of the tilting because in this embodiment, the pivot shaft 6 is positioned near the paper delivery port 12. 
     Referring now to another embodiment of the present invention shown in FIGS. 7(a)-7(e), FIG. 7(a) shows the apparatus waiting for sheets of paper; 7(b) shows a state in which paper is clamped state; 7(c) shows a state in which the clamped sheets of paper have been conveyed to a paper delivery port, 7(d) shows a state in which a tray clamping the sheets of paper has been rotated to the position of a recovery box 15 about a tilting shaft 25, and 7(e) shows a state in which the tray has been rotated to the position of a recovery box 16. Although the tilting shaft 25 of the tray is different from that used in the previous embodiment, the function and effect of this embodiment are almost the same as in the previous embodiment. 
     As shown in the above embodiments, the for clamping sheets of paper on a tray as referred to herein is a complete set of devices for rotating the presser member 2 using the motor 5, including the belts 10a, 10b and gears 11d, 11e. And the device for conveying the sheets of paper forward or reverse while maintaining the clamped state as referred to herein indicates a complete set of driving devices for the belts 10a, 10b, using the motor 4, including the belts 10a, 10b and the gears 11a, 11b, 11c. Further, the device for tilting and stopping the device for clamping the sheets of paper on the tray in a plurality of stop positions except a paper delivery port in the clamped is both a drive control system and a device for tilting the tray 1, including the gears 11f, 11g and the motor 3.