Classifications

• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
  • G07D3/00—Sorting a mixed bulk of coins into denominations
  • G07D3/02—Sorting coins by means of graded apertures
  • G07D3/10—Sorting coins by means of graded apertures provided by sieves arranged in series
• • G—PHYSICS
  • G07—CHECKING-DEVICES
  • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
  • G07D9/00—Counting coins; Handling of coins not provided for in the other groups of this subclass

Definitions

• the present invention relates to a device and a method for separating foreign objects from a mass of coins between a coin intake and a coin lifting device in a coin sorting and/or counting machine.
• Such devices or machines are usually provided with a coin intake and a coin lifting device (such as a hopper) , wherein the coin intake is arranged to receive an incoming mass of coins and to supply this mass of coins to the coin lifting device, which estab ⁇ lishes some sort of order among the coins in the mass, such as a sequential order, so that the coins one after another may be supplied at a proper speed to a subsequent sorting and/or counting process.
• Such self-service coin handling machines may be located in for instance bank offices to be used by any customer who wants to cash or deposit an unsorted mass of coins. For instance, a businessman may want to deposit his daily earnings, or a private person may bring his savings. The customer in question will deposit the mass of coins in a coin intake, and then the coin handling machine will sort and count the coins received and acknowledge the amount received by means of for instance a written verification, on which the counted amount is specified.
• Previously known coin handling machines are usually provided with a separating function, wherein any coin not accepted due to e.g. an incorrect currency, defor ⁇ mation of the coin or the like, is separated from the rest of the coins and is returned to the customer, or is con ⁇ fiscated by the machine as an alternative.
• the problem gets worse if the coin mass contains such foreign objects, which as to their shape, size or the like are considerably different from coins acceptable to the machine. Examples of such foreign objects are paper clips, safety-pins, screws, nuts, hair pins, pocket fluff, etc. If such foreign objects are deposited in a coin handling machine, the risk of damage to mechanical or electrical components in the machine is not negligible.
• a device and a method have been developed to eliminate or reduce the above-mentioned problems, when a mass of coins with inappropriate contents or of an inappropriate volume is supplied by a customer to a coin handling machine.
• the object of invention is achieved by a device and a method for separating foreign objects from a mass of coins between a coin intake and a coin lifting device in a coin sorting and/or counting machine with the features of the characterising part of the appended independant patent claims .
• a device and a method for separating foreign objects from a mass of coins between a coin intake and a coin lifting device in a coin sorting and/or counting machine with the features of the characterising part of the appended independant patent claims .
• FIG 1 is a partly fractioned side view of a device according to a preferred embodiment of the invention
• FIG 2 is a partly exploded perspective view of the device according to FIG 1,
• FIGs 3 and 4 illustrate alternative embodiments of an insert element used in the device
• FIG 5 is a perspective view of a device according to an alternative embodiment of the invention.
• FIG 6 is a side view of the device according to FIG 5, and FIG 7 is an exploded perspective view of the device according to FIGs 5 and 6.
• the device comprises a coin intake 10, suspension means 11,12, a drum 13 with perforations 14, a driving device 15 with a driving belt 16 belonging thereto, a collecting vessel 17, and a drum insert 18.
• the device is arranged to be mounted by means of the suspension means
• the drum 13 is open at its respective ends, is connected at its first end to the coin intake 10, which in turn is connected to the coin intake in the coin sorting and/or counting machine, and is connected at its second end to the coin lifting device in said machine.
• the drum 13, having a substantially circular cross section, is preferably made of e.g. metal or plastics and is according to the preferred embodiment horizontally arranged, but may as an alternative be arranged at a certain downward or upward inclination.
• An insert element 18 is arranged inside the drum 13, as indicated in FIG 1.
• the insert element 18 is illustrated as being with ⁇ drawn from the drum 13, for reasons of clarity.
• the insert element 18 has the shape of a so called Archimedes screw, which in essence may be described as a series of interconnected and substantially circular discs, each of said discs being cut along the main portion of its diameter with a minor portion of each circle diameter being left uncut in order to keep the two circle halves together.
• each circle half of each circle is vertically arranged (i.e. arranged in the radial direction of the drum 13) , while the second circle half is arranged at a certain angle with respect to the first circle half.
• Each vertical circle half is connected at its first end to the subsequent angled circle half and at its second end to the preceding angled circle half.
• the same is true for the angled circle halves with respect to the vertical ones, with the exception, of course, of the outermost circle halves at the respective ends of the insert element 18.
• the angled half has a substantially circular shape (a short distance) , or an elliptic shape (a longer distance) , respectively.
• the insert element 18 is manufactured of a relatively thin metal plate, and the insert element is firmly mounted on the inside of the drum 13 by for instance soldering or welding.
• the number of segments is important for several reasons .
• the more segments dividing an insert element of a certain length the better the separation becomes of foreign objects, since these objects are exposed to more tumblings and are hence given a better opportunity to be separated.
• the transport velocity in the axial direction of the drum is decreased when the number of segments is increased.
• the distance between two subsequent vertical circle halves should be slightly longer than the diameter of the largest coin appearing in the coin system in question in order to avoid the risk of such a coin getting stuck. Trials have shown, that a distance of 45 mm between two vertical circle halves combined with four segments according to FIG 2, gives a very high probability of separation for the preferred embodiment of the invention, without the transport velocity decreasing to an unacceptably low level.
• FIG 3 there is shown an alternative design 19 of the insert element.
• both of the circle or ellipse halves are angled to the same extent with respect to the radial direction of the drum.
• Such a design provides a smoother transport, since the mass of coins is now transported forward during the entire revolution of the drum.
• the first embodiment 18 is currently regarded as the most suitable design to be used in the device according to the preferred embodiment, and this is true also from a manufacturing point of view.
• FIG 4 yet another embodiment 20 of the insert element is illustrated.
• the insert element is helically formed from a wire- or strip-shaped element of for instance metal.
• the function is essentially the same as with the alternative 19 according to FIG 3.
• the insert element 18 according to FIG 2 as well as the insert element 19 according to FIG 3 may be provided with fine perforations in order to avoid adhesion of wet coins or foreign objects to the surfaces of the insert element due to capillary forces.
• the drum perforations 14 are formed as round holes, the diameter of which is chosen to be slightly smaller than the smallest coin size acceptable to the coin handling machine in question.
• a driving device 15 preferably any previously known simple electrical motor is used, which is capable of driving the drum through the driving belt 16 in rotation around its longitudinal axis.
• the driving device 15 is responsive to a control signal for setting the rotational speed of the drum.
• a mass of coins which may be unsorted and may contain foreign objects, is deposited by a customer into a coin intake in a machine for sorting and/or counting the coins in said mass of coins .
• the coin intake is connected to the intake 10, the mass of coins thereby being supplied to the drum 13 through the intake 10.
• the mass of coins is transported in a way described below through the drum from the coin intake to the coin lifting device, which then forwards the coins to subsequent sorting and counting processes. Any foreign objects present in the mass of coins are separated during the transport in the drum through the drum perforations 14, and these objects are collected in the collecting vessel 17.
• the diameter of the perforations is, as described above, also important, and so is the rotational speed of the drum.
• a suitable perforation diameter is 13-16 mm for the preferred embodiment of the invention, but other values may also be appropriate.
• An alternative embodiment of the device according to the present invention will now be described with reference to FIG 5-7.
• the device comprises a coin intake 30, suspension means 31, 32, a drum 33 with perforations 34 and a driving device 35. Even if this embodiment exhibits design differences as compared to the previously described preferred embodiment, the parts spe ⁇ cified above according to FIGs 5-7 all have essentially the same function as the corresponding parts according to FIGs 1-4, and hence these parts are not described in more detail here .
• drum 33 is now arranged in a downward slope towards the coin lifting device for reasons obvious from the following.
• reference numeral 39 indicates the drum angle with respect to the horizontal plane.
• a number of carrier rails 38 are mounted on the inner wall of the drum 33, essentially in the axial direction of the drum. These rails, which preferably are made of metal or plastics, are preferably arranged with a certain dis- placement in relation to each other in the axial direction of the drum, and they are bended at an obtuse angle at the end pointing away from the coin intake. A suggested design of the carrier rails 38 is illustrated more clearly in FIG 7.
• the carrier rails 38 have replaced the insert element 18; 19; 20 described above, and an advantage with this approach is that the rails may be manufactured at a very low cost.
• the purpose of the rails is to expose the mass of coins to a tumbling force when the drum 33 is rotated and to contribute to the transport of the mass of coins through the drum. Thanks to the downward slope of the drum according to the above the transport of the mass of coins is facilitated.
• the rails 38 are as described above bended at the far end pointing towards the coin lifting device, thereby aiming at giving such foreign objects a direction suitable for separation through any of the perforations 34.
• the inner wall of the drum is additionally provided with a number of members, not shown in the figures, which are formed as pins or edges protruding in an essentially radial direction. These members also help in giving elongated foreign objects an orientation which is mainly orthogonal to the axial direction of the drum, thereby facilitating separation through the perforations.
• An important parameter of the embodiment is the drum inclination or angle 39 with respect to the horizontal plane. If the inclination is too steep, the mass of coins will be transported too quickly through the drum, thereby not letting all foreign objects to be separated. If the inclination is too small, difficulties arise when it comes to transporting the mass of coins. In practice, an angle of inclination of about 10-15 degrees has proved suitable.
• the driving device 15; 35 is responsive to an external control signal for setting the rotational speed of the drum.
• this external control signal is generated by a sensor in the coin lifting device, the control signal thereby having a nominal value, when the flow of coins into the coin lifting device - or, alternatively, the coin level in the device - lies within the limits of a successful handling of the coins for the coin lifting device and sub ⁇ sequent sorting and counting processes.
• the driving means will drive the drum at a predetermined rotational speed accor- ding to the above, thereby obtaining a certain speed of coin flow.
• the control signal is given another value, wherein the driving device will detect the changed control signal and lower the rotational speed of the drum. As a consequence the coin flow speed will decrease, and the coin lifting device will be able to handle the superfluity of coins at the coin lifting device.
• the control signal is given its nominal value, the drum thereby retur ⁇ ning to its normal rotational speed.
• a sensor may be provided for measuring the drum speed.
• This sensor is operatively con ⁇ nected to a control unit capable of monitoring the momen ⁇ tary speed as detected by the sensor, thereby detecting an over-full or packed drum condition, since the speed will then have decreased below a predetermined value.
• a control signal is supplied to the driving device 15; 35 for adjusting the rotational speed in a way similar to the one described above.
• the device according to the invention has a function as a protection against over ⁇ filling or a buffer receptacle.
• the reduction described above of the rotational speed may be carried out in several steps, wherein the control signal may be given a corresponding number of different values.
• the rotational speed may be reduced to a zero value, wherein the drum does not move, or to a negative value, wherein the drum is rotating in an opposite direction as compared to the normal direction. This is especially suitable to remedy such situations, wherein elongated objects are in some way stuck in the drum, thereby obstructing the flow of coins.
• the drum is manufactured with an essentially polygonal cross section, such as a square shape or a hexa- gonal shape. Thanks to the angularity of this cross section a mass of coins being transported through the rotating drum will be exposed to a tumbling force similar to the one described above for the embodiment according to FIGs 5-7. With a polygonal cross section of the drum the need for separately mounted carrier rails 38 is consequently eliminated or reduced.
• the rest of the device according to this embodiment is essentially designed in accordance with the embodiments described above.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Testing Of Coins (AREA)
• Combined Means For Separation Of Solids (AREA)
• Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
• Basic Packing Technique (AREA)
• Formation And Processing Of Food Products (AREA)
• Feeding Of Articles To Conveyors (AREA)
• Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Priority Applications (13)

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Related Child Applications (1)

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Cited By (19)

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Citations (3)

Family Cites Families (33)

• 1995
  • 1995-03-28 SE SE9501091A patent/SE504132C2/sv not_active IP Right Cessation
• 1996
  • 1996-02-07 AT AT96907817T patent/ATE220470T1/de not_active IP Right Cessation
  • 1996-02-07 DE DE69622263T patent/DE69622263T2/de not_active Expired - Lifetime
  • 1996-02-07 RU RU97117598A patent/RU2133981C1/ru not_active IP Right Cessation
  • 1996-02-07 AU AU51287/96A patent/AU710554B2/en not_active Ceased
  • 1996-02-07 US US08/913,495 patent/US6071187A/en not_active Expired - Lifetime
  • 1996-02-07 ES ES96907817T patent/ES2179939T3/es not_active Expired - Lifetime
  • 1996-02-07 MX MX9707375A patent/MX9707375A/es active IP Right Grant
  • 1996-02-07 CN CN96193964.8A patent/CN1122948C/zh not_active Expired - Fee Related
  • 1996-02-07 BR BR9608297-6A patent/BR9608297A/pt not_active Application Discontinuation
  • 1996-02-07 JP JP8529237A patent/JP2997065B2/ja not_active Expired - Fee Related
  • 1996-02-07 PL PL96323342A patent/PL180739B1/pl not_active IP Right Cessation
  • 1996-02-07 CA CA002216709A patent/CA2216709C/en not_active Expired - Lifetime
  • 1996-02-07 EP EP96907817A patent/EP0818029B1/en not_active Expired - Lifetime
  • 1996-02-07 DK DK96907817T patent/DK0818029T3/da active
  • 1996-02-07 WO PCT/SE1996/000142 patent/WO1996030877A1/en active IP Right Grant
• 1999
  • 1999-12-28 US US09/473,440 patent/US6179703B1/en not_active Ceased
• 2004
  • 2004-12-17 US US11/016,088 patent/US20060025062A1/en not_active Abandoned

Patent Citations (3)

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