A device for forming and transferring ordered stacks of sheets, in particular banknotes

Abstract: Banknotes (3) emerging from a checking machine (4) are caused to advance singly in succession along an outfeed duct (5) of which the runout (5a) connects with a stacking channel (8); the banknotes (3) come to rest on a companion element (6) operating along the channel (8) and capable of movement between a first receiving position, in which the banknotes accumulate until formed into a group (7) of given number that corresponds to one stack (2), and a second release position within the operating compass of a compactor (9) with hinged arms (23), of which the function is to compress and hold the stack (2) against the companion element (6). The compacted stack (2) of banknotes (3) is picked up finally by a gripper (25) and transferred from the companion element (6) to a bundling machine (11), which binds it with a wrapping band (28).

Description: The present invention relates to a device for forming and transferring ordered stacks of sheets, in particular banknotes. The present invention is employable to advantage in machines by which banknotes are first ordered and then wrapped in bundles, or in groups of bundles, and indeed reference is made herein specifically to this type of application albeit no limitation in general scope is implied. The prior art embraces machines for checking the quality or condition of banknotes. In operation, a succession of banknotes of whatever type will be introduced into an infeed end of the machine which, having checked the notes and eliminated any that are found to be defective, is designed to divide up the good notes according to denomination and/or type, directing them toward respective outlets of the machine which are independent one of another. In this way, groups of single banknotes are formed at each of the single outlets; once a predetermined number of banknotes per group has accumulated, the groups are picked up manually and transferred to a machine by which each is bound individually with at least one wrapping band to create a respective bundle. The object of the present invention is to provide a device for forming and transferring ordered stacks of banknotes by which the connection between the checking machine and the bundling machine can be rendered completely automatic. The prior art also embraces machines in which the banknotes accumulate at the outlets not as groups of single notes but rather as bundles of notes that have already been checked and secured with wrapping bands. GB-A-2.054.513 dicloses a device comprising the features of the preamble of claim 1. The invention is defined by the features of claim 1. Preferred embodiments are defined in the dependent claims. The invention will now be described in detail, by way of example, with the aid of the accompanying drawings, in which: fig 1 illustrates a preferred embodiment of the device according to the present invention, viewed in perspective with certain parts in section and certain parts omitted, operating between a banknote checking machine and a bundling machine; fig 2 is a further perspective view of the device illustrated in fig 1; fig 3 shows a detail of the device illustrated in fig 1, viewed in perspective from the front; fig 4 shows a detail of the device illustrated in fig 1, viewed in perspective from the rear; fig 5 illustrates an alternative embodiment of the device according to the present invention, viewed in perspective; fig 6 illustrates a further alternative embodiment of the device according to the present invention, viewed in a schematic side elevation. With reference to figs 1 and 2 of the accompanying drawings, 1 denotes a device, in its entirety, for forming and transferring ordered stacks 2 of single sheets, in particular banknotes 3 emerging from a machine 4 (indicated schematically in fig 1, and visible only in part) by which they are checked, and rejected if defective or spoiled. Fig 1 shows the banknotes 3 advancing along an outfeed duct denoted 5; on reaching the runout 5a of the duct 5, the banknotes 3 are taken up by relative gripping means 34 of conventional embodiment and transferred by these same means to the forming and transfer device 1, which in turn forms the sheets first into groups 7 and thereafter into stacks 2 that will be directed on to a bundling machine of conventional embodiment, indicated by the block denoted 11 in the drawings. In practice, the device 1 disclosed is a unit providing an automatic interface between the checking machine 4 (also conventional) and the bundling machine 11. Throughout the specification, 7 denotes a group of banknotes 3 already checked by the machine 4, which are caused to accumulate in a stacking channel 8 located beyond the runout 5a of the duct 5, whereas 2 denotes a stack proper, that is to say a group 7 of notes ordered, compacted and ready for bundling. 7a denotes a group of banknotes 3 secured with a wrapping band 28 (as in fig 5), which is referred to as a bundle 29. The stacking channel 8 comprises a back wall 12 and two side walls 13, and constitutes an integral part of the forming and transfer device 1. More exactly, the channel 8 extends transversely and downwards in relation to the duct 5, embodied in two sections connected together with no break in continuity and inclined respectively at dissimilar angles relative to the vertical. The top first section, or ordering section 8a, is angled significantly in relation to the vertical, whereas the second bottom section or compacting section 8b is substantially upright. The function of the more steeply angled top section 8a is to restrain and order the group 7 of banknotes 3 initially during the formation of a stack 2 and to guide the stack 2 subsequently during its transfer to the bottom section 8b. The bottom section 8b is referred to as a "compacting" section by reason of the fact that the stack 2 of banknotes is subjected to the action of a compactor element 9 associated and operating in conjunction with this same bottom section, as will become evident in due course. As discernible from fig 1 and fig 2, the device 1 comprises a companion element 6 rendered capable of movement along the stacking channel 8 through the agency of a flexible drive component 18 (such as a chain) looped around two wheels 19, 20 positioned at opposite ends of the channel 8, and routed along one side wall 13 thereof. The companion element 6 comprises a platform 16 of which the end offered to the internal face of the side wall 13 is furnished with slide means 17 of suitable embodiment consisting, for example, in a trolley 17a having wheels 38 that are positioned to roll against the internal face of the side wall 13, following a set path determined by guide means 14 incorporated into the side wall 13. More exactly, the trolley 17a is connected to the flexible drive component 18 by way of a bracket 21 accommodated slidably within a longitudinal slot 22 afforded by the side wall 13 and providing a track along which one wheel 38 of the trolley 17a is made to roll. Observing figs 2 and 3, it will be seen that the companion element 6 is capable of movement along the stacking channel 8 between two operating limit positions, namely a first receiving position and a second release position. In the receiving position, the companion element 6 is located at the runout 5a of the duct 5 in such a manner as to take up the banknotes 3 as these settle one on top of another on the platform 16, accumulating ultimately until the completion of a selected number corresponding to one group 7, which will go to make up a relative stack 2. In order to favour the formation of each group 7 of banknotes 3, the companion element 6 could be made, at least when in the first receiving position, to effect a gradual descending movement that will be a function of the number of banknotes 3 allowed to accumulate on the platform 16. In other words, the gradual descending movement would be reflected in a succession of intermediate positions occupied by the companion element 6 during the formation of the group 7, in such a way that the distance between the runout 5a of the duct 5 and the last banknote 3 to be added to the group 7 will remain constant. Adopting this type of solution, shown in fig 2, the device 1 will be equipped with suitable means 33 by which to sense the passage of the banknotes 3 onto the companion element 6, typically a counter wired to a monitoring and control unit 39 serving in turn to pilot a motor 37 driving one of the wheels 19 or 20 around which the flexible drive component 18 is looped. In practical application, the motor 37 can cause the companion element 6 to descend either by discrete steps or continuously. In any event, the slide means 17 and the flexible drive component 18 together with the wheels 19, 20 and the motor 37 constitute drive means, denoted 15 in fig 2, by which the companion element 6 is made to alternate between the first receiving position and the second release position. In the release position, the companion element 6 occupies the bottom section 8b of the stacking channel 8. Also operating in this same section 8b is a compactor element 9 of which the function is to compress the stack 2 of banknotes 3 against the platform 16 of the companion element 6. Observing fig 3 in particular, the compactor element 9 will be seen to comprise a pair of arms 23 associated pivotably with a further wall 35 of the channel 8 and capable thus of movement between a raised or standby limit position, outside the dimensional compass of the stacking channel 8, and a lowered or compacting limit position within the dimensional compass of the channel. The movement in question is produced by an actuator 24 operating a transmission lever 36 to which the two arms 23 are connected. In the raised position, the arms 23 allow the stack 2 of banknotes 3 to pass along the channel 8 during the movement of the companion element 6 toward the second or release operating position. Once the last or topmost banknote 3 of the stack 2 has advanced beyond the arms 23, the arms will be lowered into the compacting limit position and begin thereupon applying pressure to the stack 2, thus packing the accumulated banknotes 3 against the platform 16 of the companion element 6 by which they continue to be supported. The device 1 further comprises pincer-like gripping means 10 of which the function is to pick up the stack 2 of banknotes 3 pinned between the arms 23 of the compactor element 9 and the platform 16 of the companion element 6, and transfer it from this position to the bundling machine 11 (as shown to advantage in figs 2 and 4). Such means 10 comprise a gripper 25, furnished with a head 26 of which the face dimensions are substantially the same as those of the stack 2. The head 26 in turn is furnished bilaterally with a pair of gripping arms 27, top and bottom respectively, between which the stack 2 of banknotes 3 is taken up and held tightly against the head 26; in this way, the stack 2 is compacted further and thus can be distanced from the position occupied hitherto, restrained between the arms 23 of the compactor element 9 and the platform 16 of the companion element 6. The gripper 25 is capable of movement cyclically between an extended position in which the stack 2 is taken up and distanced from the channel 8, and a retracted position in which the stack 2 is released to the bundling machine 11. In order to allow the cyclical movement whereby the gripper 25 is able to gain the extended position internally of the channel 8 and engage the stack 2, the back wall 12 of the channel affords at least one portion 32 designed to open in the manner of a flap (shown to advantage in fig 4), incorporated into the bottom section 8b and coinciding with the position occupied by the stack 2 when the companion element 6 is in its second position. To ensure the arms 27 of the gripper 25 can engage the stack 2 with maximum ease, the platform 16 of the companion element 6 might be fashioned with a recess 16a (see fig 1) facilitating the entry of the bottom arm 27. Fig 6 illustrates an embodiment of the device 1 in which the stacking channel 8 is dissimilar to that described thus far. In this instance the channel 8 comprises a bottom section 8b hinged to the top section 8a and capable thus of movement between a first lowered position, angled in relation to the top section 8a and disposed substantially vertical, and a second elevated position substantially of alignment with the top section 8a. In the embodiment of fig 5, the device 1 is set up to allow the formation and transfer of groups of banknotes 3 already arranged in ordered stacks 2. Each successive group, denoted 7a in fig 5 so as to distinguish it from the group 7 accumulating at the runout 5a of the duct 5, comprises a predetermined number of banknotes bound together with a wrapping band 28. In this instance the device 1 will also incorporate a bundling station 30 (conventional in embodiment and illustrated in fig 5 as an enclosed unit) associated with the top section 8a of the stacking channel 8, which performs the function of dividing up the banknotes 3 into single groups 7a and binding each group with a respective wrapping band 28 to create a single bundle 29. In exactly the same manner as described previously for single banknotes 3, the bundles 29 are caused to settle one on top of another on the platform 16 of the companion element 6, which is capable of movement at least between two limit operating positions, namely a receiving position coinciding in this instance with the outlet of the top section 8a of the channel 8, at which the bundles 29 are received by the bottom section 8b and accumulated until the completion of a given number corresponding to one stack 2, and a release position located along the bottom section 8b of the channel 8 occupied by the compactor element 9. Clearly, the combined action of the compactor element 9 and the platform 16 of the companion element 6 is applied in this instance to a stack 2 of bundles 29 rather than to a stack of single sheets. The gripper 25 likewise performs the same sequence of operating steps as described previously, taking up the stack 2 of bundles 29 and effecting the transfer from the companion element 6 to the bundling machine 11 (not illustrated), which will then proceed to bind the bundles 29 together.

Claims: A device for forming and transferring ordered stacks of sheets, in particular banknotes emerging from a checking machine (4) and caused to advance in succession along an outfeed duct (5), comprising: a companion element (6) against which the banknotes (3) come to rest, one on top of another, operating along a stacking channel (8) and capable of movement at least between two limit operating positions definable respectively as a first receiving position in which the banknotes (3) are taken up in a predetermined number constituting a group (7) equivalent to one stack (2), and a second release position characterized in that in the second limit position, i.e. release position, a compactor element (9) compresses the stack (2) of banknotes (3) against the companion element (6); pincer-like gripping means (10) operating at the second limit position and picking up the compacted stack (2) of banknotes (3) to transfer it from the companion element (6) to a bundling machine (11). A device as in claim 1, wherein the stacking channel (8) is located adjacent to the runout (5a) of the outfeed duct (5) and comprises a back wall (12) and two side walls (13) by which the group (7) of banknotes (3) is contained during the formation of the group (7) and during the movement of the companion element (6) toward the second operating position, of which at least one side wall (13) affords guide means (14) with and along which the companion element (6) is slidably associated and set in motion by relative drive means (15). A device as in claim 2, wherein the stacking channel (8) extends substantially transversely and downwards in relation to the outfeed duct (5) and is embodied in two sections (8a, 8b) appearing as a first top section (8a) by which the group (7) of banknotes (3) is ordered and formed into a stack (2), and a second bottom section (8b) by which the stack (2) is compacted, connected together with no break in continuity and inclined respectively at dissimilar angles relative to the vertical. A device as in claim 2 or 3, wherein the companion element (6) on which the banknotes (3) come to rest consists in a platform (16) disposed transversely to and internally of the stacking channel (8) and supported by slide means (17) supported in turn by and slidable along the guide means (14) afforded by the side wall (13) of the stacking channel (8). A device as in claims 1, 2, 3 and 4, wherein drive means (15) comprise a flexible drive component (18) routed externally along the side wall (13) of the stacking channel (8), looped around corresponding wheels (19, 20) of which one is power driven, and connected to the slide means (17) of the companion element (6) by way of bracket means (21) capable of movement along a longitudinal slot (22) afforded by the side wall (13). A device as in preceding claims, wherein the compactor element (9) comprises a pair of arms (23) pivotably associated with the stacking channel (8) and capable of movement, generated by means of an actuator (24), between a raised standby limit position outside the dimensional compass of the stacking channel (8), in which freedom of passage is allowed to the stack (2) of banknotes (3) during the downward movement of the companion element (6) toward the second operating position, and a lowered compacting limit position within the dimensional compass of the channel (8), in which a compacting pressure is applied to the stack (2) of banknotes (3). A device as in preceding claims, wherein pincer like gripping means (10) comprise a gripper (25) consisting in a head (26) of face dimensions substantially the same as the face dimensions of the stack (2), and a pair of gripping arms (27) extending bilaterally from the head, top and bottom respectively, by which a stack (2) of banknotes (3) pinned between the compactor element (9) and the companion element (6) can be taken up, compacted further and displaced from its current position by virtue of the gripper (25) being capable of movement cyclically between an extended position, in which the stack (2) is picked up and distanced from the channel (8), and a retracted position in which the stack (2) is released to the bundling machine (11). A device as in claim 7, wherein the back wall (12) of the stacking channel (8) affords at least one portion (32) positioned level with the gripping means (10) and designed to open in such a manner that the gripping means (10) can move toward the extended position and pick up the stack (2). A device as in preceding claims, wherein the companion element (6) can be made, at least when in the first receiving position, to effect a gradual descending movement that is a function of the number of banknotes (3) accumulated in order to complete one group (7), further comprising means (33, 39) of which the function is to monitor the accumulation of the banknotes (3) on the companion element (6) and pilot the operation of the relative drive means (15) accordingly. A device as in claim 3, wherein the second bottom section (8b) of the stacking channel (8) is hinged to the first top section (8a) and capable thus of movement between a first lowered position, angled in relation to the top section (8a), and a second elevated position substantially of alignment with the first top section (8a). A device as in preceding claims, wherein a first top ordering section (8a) of the stacking channel (8) incorporates a bundling station (30) along which the group (7) of banknotes (3) is divided up into single smaller groups (7a), each bound individually with a relative wrapping band (28) to form a single bundle (29) and brought to rest thereafter on the companion element (6).

Inventors: KAYANI SOHAIL, NERI ARMANDO, VANDERPOOL L JAMES, KAYANI, SOHAIL, NERI, ARMANDO, VANDERPOOL, L. JAMES, Kayani, Sohail, c/o Currency Systems Int., Inc., Vanderpool, L. James, c/o Currency Sys. Int., Inc.
Applicants: CURRENCY SYS INT INC, CURRENCY SYSTEMS INTERNATIONAL, INC.
Application year: 1997
Main classification: G07D9
IPC codes: B65H31, G07D9