Coin supply device for coin-operated gaming machine

Abstract: A coin supply device includes a transport belt and a separating roller disposed above the transport belt. An upper coin of two lapped coins are pushed back and separated by the separating roller rotating in the direction opposite to that of the transport of the transport belt. The remaining lower one coin is allowed to pass under the separating roller, and fed to a hopper apparatus provided for for pay-out after passing under a coin sensor.

Description: The present invention relates to a coin supply machine, more particularly to an apparatus for receiving coins in a coin-operated gaming machine in order to play a game. In a coin-operated gaming machine e.g. a slot machine, a coin including token must be inserted in a coin inlet before a game can be started. At least one coin is required for playing one game. To increase prize-winning lines for the purpose of enlarging the probability of winning a prize, or to enlarge odds for a dividend of a prize, two or three coins may be inserted. In a convential slot machine, it is necessary for the player to insert coins manually coin by coin for each game, which is a highly laborious operation. For the automation of receiving coins in the slot machine, there has been proposed in Japanese Patent Laid-open Publication No. 2-57284 a coin supply apparatus in which a greater number of coins can be together put in a coin containing portion, and coins are fed one by one before each game. The coin put in the coin containing portion of this coin supply apparatus is supplied to a hopper device, which is actuated before one game is played. The coin fed from this hopper device is detected by a coin sensor, and enters a hopper apparatus provided for payout. The slot machine is thereby in a state in which the coin is substantially admitted into the slot machine. However, the hopper device of the coin supply apparatus described in the above document includes a revolution body having recesses formed on its circumference for receiving the respective coins in order to feed them successively. There is still a problem in that this coin supply apparatus is large in size. US-A-4 457 320 and US-A-2 792 100 disclose coin feed devices in which stacked coins are separated by passing them on a moving belt under a contra-rotating roller. In US-A-4 457 320 on which the precharacterising portion of claim 1 is based coins fall from an insertion hopper through a labyrinthine chute onto a channel defined by a downwardly moving inclined belt which passes beneath portions of a roller protruding through the roof of the channel. The roller rotates so as to push stacked coins backwards. It is an object of the present invention to provide an improved coin supply device which is of a small size and can separate coins. According to the present invention there is provided a coin supply device for supplying a coin-operated machine with coins one by one, comprising: a coin containing portion to receive plurality of manually inserted coins; a first transport belt connected round a first downstream roller and a second upstream roller for transporting said coins supplied from said coin containing portion; a first guide wall provided along a direction of transport of said first transport belt substantially upright relative to said first transport belt; and a separating roller provided close to said transport belt and for rotating in the same direction as said downstream roller in order to allow to pass a lowest coin of said supplied coins lapping one over another on said first transport belt to be supplied to said coin-operated machine and to push back coins lapping over said lowest coin, characterised in that the separating roller is positioned above and directly opposite the first downstream roller and defines with said first transport belt a spacing of between substantially the thickness and twice the thickness of a coin of a predetermined kind at the point where the first transport belt passes around the first downstream roller. Thus with the invention all the coins put in the coin supply device according can be fed successively to the slot machine and the size of the coin supply device can be smaller than that of a conventional coin supply device. In a preferred embodiment, a second transport belt is disposed to be downstream from the first transport belt for receiving and transporting the coins fed one by one through the spacing. The second transport belt is driven at a speed higher than the first transport belt in order to enlarge intervals of the coins supplied from the first transport belt. The present invention will be further described by way of non-limitative example with reference to the accompanying drawings, in which: Fig. 1 is a perspective view illustrating a slot machine incorporating a coin supply device in accordance with the present invention; Fig. 2 is a schematic view illustrating the coin supply device illustrated in Fig. 1; Fig. 3 is a section view illustrating an important portion of the coin supply device illustrated in Fig. 1; Figs. 4 to 8 are explanatory views illustrating an operation of two transport belts, and a separating roller of the coin supply device. In Fig. 1, which shows a slot machine incorporating a coin supply device of the present invention, the slot machine 2 is provided with a front door 3 openable with respect to a main body of the slot machine 2. This front door 3 is provided with a start button 4, stop buttons 5 to 7, and a coin containing portion 8 capable of receiving at one plurality of coins 16 put therein, coin number specifying buttons 9 to 11, and a returning button 12 for paying out the coins 16 as put in. Inside the coin containing portion 8 and under the opening 8a formed within the coin containing portion 8, the coin supply device 13 according to the present invention is disposed, later to be described in detail. Two coin passageways or coin chutes 14 and 15 are connected to the downstream position of the coin supply device 13, as is indicated by the broken line in the drawings. The lower parts of the coin chutes 14 and 15 extend to a hopper apparatus 17 and a coin saucer 18 respectively. A front panel 20 is mounted on an upper part of the door 3 above the stop buttons 5 to 7. Three reels 21 to 23 are rotatably disposed on a rear side of the front panel 20, and start rotating by operating the start button 4 after supplying coins to be played. Each reel 21 to 23 bears on its periphery various symbols such as "7", "orange" and "BAR". These symbols can be observed through three windows 24 to 26 formed in the front panel 20. A plurality of prize-winning lines 27 traverse the respective windows 24 to 26. The number of the effective lines is increased when a greater number of coins are inserted. While the respective reels 21 to 23 are rotating, the stop buttons 5 to 7 can be actuated after the reels have reached a steady speed of rotation. When the stop buttons 5 to 7 are actuated at desired time intervals, stop control is initiated to stop the respective reels 21 to 23, whereupon a symbol combination corresponding to a timing of operating the stop buttons 5 to 7 is displayed on the effective prize-winning line 27. However, if the symbol combination that stops on the effective prize-winning line 27 is a prize-winning symbol combination, the number of coins corresponding to the prize-winning rank of that combination are paid out of the hopper apparatus 17 into the coin saucer 18. In case no buttons have been actuates within a predetermined period of time, the respective reels 21 to 23 are sequentially stopped by an automatic stop mechanism known per se. Referring to Fig. 2 illustrating the coin supply device 13, a first transport belt 30 is disposed below the opening 8a within the coin containing portion 8 as indicated by the chain line for transporting inserted coins 16 laid thereon. In a location downstream from the first belt 30, a second transport belt 31 is arranged and driven at a transport speed higher than the first belt 30. On the upper surfaces of the first and second belts 30 and 31, a pair of parallel guide walls 32 and 33 are provided to be oblique relative to the transport direction of the belts 30 and 31. The two belts 30 and 31 are so disposed that a lateral edge of the side of the guide wall 32 is placed lower than that of the side of the guide wall 33. The guide wall 32 is thus in contact with the coins 16 fed by the belts 30 and 31. A partition wall 34 is formed on the rear ends of the walls 32 and 33. The walls 32 and 33, the partition wall 34 and a partition wall 48 later to be described define together a space where coins 16 to be supplied are received and reserved over the first belt 30. The first belt 30 is connected round a drive roller 35 and a follower roller 36, and is rotated in the direction of the arrow in Fig. 2. The second belt 31 is connected round a drive roller 37 and a follower roller 38 for rotating in the direction of the arrow. The drive rollers 35 and 37 are driven by a motor 41 via a timing belt 40 which is regulated as to tension by a pulley 39. The motor 41 is controlled via a driver 42 by a microcomputer 43 for controlling the coin supply device 13. A shaft 46 is disposed above the drive roller 35 to be rotated above the drive roller 35 to be rotated via a belt 45 in the rotary direction the same as the drive roller 35, or opposite to the direction of transporting the coins 16, and is supported by the walls 32 and 33 in parallel with the drive roller 35. A separating roller 47 is fixed on the shaft 46 between the guide walls 32 and 33, and separates the overlapping coins 16 one by one by pushing upper coins in the direction opposite to transport. The separating roller 47 is constituted by roller cylinders 47c of a smaller diameter and a side roller portion 47e of a larger diameter. Two annular grooves 47a and 47b are formed between and beside the roller cylinders 47c around the shaft 46 at an interval smaller than the diameter of a predetermined kind of coin. The interval between the surface of the roller cylinders 47c and that of the first belt 30 is determined to be larger than the thickness of the predetermined coin and smaller than the double of its thickness, so that the lowest coin transported under the roller cylinders 47c can be passed through the spacing defined thereby. The interval between the surface of the side roller portion 47e and that of the first belt 30 is smaller than the thickness of the predetermited coin, so that any lower coin in contact with the side roller portion 47e is returned by rotation of the side roller portion 47e. The interval between the guide wall 32 and the side roller portion 47e is below the double of the diameter of the predetermined coin so as to allow passage of a single coin at one time under the roller cylinders 47c. A partition wall 48 is provided above the separating roller 47 (see Fig. 4). Projections 48a and 48b are formed on the lower edge of the partition wall 48 to be fitted in the grooves 47a and 47b, and prevent the coins 16 from advancing between the partition wall 48 and the separating roller 47 which in this position turns in the direction of pulling the coins 16. A guide portion 50 is formed on the lower edge of the wall 33 along the transport direction, and is provided with an inclined surface on its upper side, which causes the coins 16 situated on the guide portion 50 to slide toward the guide wall 32 until the surface of the first belt 30. A magnetic sensor 55 is disposed above the second belt 31 for detecting the coins 16 one by one as illustrated in Fig. 2, and held on the guide wall 32 via a sensor holder 56. Between the sensor holder 56 and the separating roller 47, there is disposed a nip roller 57 for being rotated by the shaft 46 via a gear. The nip roller 57 presses the coins 16 against the second belt 31 so as to prevent the coins 16 from contact with the sensor holder 56 (see Figs. 7 and 8). The magnetic sensor 55 is connected to a judging circuit 58 and outputs a detecting current corresponding to a diameter of a coin as detected. The judging circuit 58 A/D converts the detecting current as a digital signal, and compares the digital signal with a model signal written in a ROM 59. If the digital signal is equal to the model signal, then the judging circuit 58 supplies the microcomputer 43 with a RIGHT signal representing coincidence with a genuine coin or the predetermined kind. If the digital signal is different therefrom, then a WRONG signal is supplied representing a false coin or a different kind. It is noted that a photosensor of a reflection type may be used for detecting the coins 16 instead of the magnetic sensor 55 of the present embodiment. Two passage plates 14a and 15a are positioned in positions downstream from the second belt 31, and constitute bottom surfaces of the coin chutes 14 and 15, through which the coins 16 are slid on the passage plate 14a or 15a and is passed down to the hopper apparatus 17 or the coin saucer 18. For selection of the coin chutes 14 and 15, a swingable guide plate 61 is swung by a solenoid 60 and is changed over. The solenoid 60 is connected to the microcomputer 43 via a driver 62, and is driven thereby when a WRONG signal is outputted. The solenoid 60 is stopped by the microcomputer 43 from being driven when a RIGHT signal is outputted or at a lapse of a predetermined period. There are signal generators 70 and 71, a subtractive counter 73 and a driver 74 each connected to the microcomputer 43. The coin number specifying buttons 9 to 11 are provided on the signal generator 70 for specifying one number of coins to be played in one game, as one, two or three coins respectively. The signal generator 70 supplies the microcomputer 43 with a coin number specifying signal corresponding to one of the buttons 9 to 11. The coin number specifying signal is supplied to the counter 73 via the microcomputer 43 so as to set the corresponding number of the coins to be played in the counter 73. The count of the counter 73 is decremented by one upon each RIGHT signal supplied from the judging circuit 58. Upon each decrement of the counter 73, the one coin as detected of the predetermined kind is run down on the passage plate 14a of the coin chute 14 toward the hopper apparatus 17. If a WRONG signal is supplied, no decrement is effected in the counter 73, whereas the coin as detected is run down on the passage plate 15a of the coin chute 15 toward the coin saucer 18, because the solenoid 60 is driven upon the WRONG signal to swing the swingable plate 61. When the number of coins to be played in the counter 73 becomes "zero" after repeating decrement of the count then the microcomputer 43 stops the motor 41 from being driven. One as counted finally of the coins 16 of the specified number is kept still on the second belt 31 without advancing to the hopper apparatus 17. The slot machine 2 stands by for the start of a game upon detecting the number of coins corresponding to the pressed one of the coin number specifying buttons 9 to 11 by means of the magnetic sensor 55. The final coin is left as such while playing one game including an operation of the start button 4, rotation and standstill of the reels 21 to 23, and the payment of a prize. The unmoved coin is fed to the hopper apparatus 17 on the passage plate 14a, first upon performing the following operation, i.e. for playing another game or for terminating games by pressing the returning button 12. The signal generator 71 is connected to the returning button 12 for supplying the microcomputer 43 with a returning signal. The microcomputer 43 sets the judging circuit 58 so as to output a WRONG signal upon receiving every detecting current, drives the motor 41, and allows the above one coin left on the second belt 31 to run down to the hopper apparatus 17. Then, the judging circuit 58 supplies the microcomputer 43 with a WRONG signal for a respective detecting current from the magnetic sensor 55. All the coins as put in the coin containing portion 8 are returned one after another to the coin saucer 18 through the coin chute 15. When the coin containing portion 8 is emptied, the magnetic sensor 55 supplies no detecting current so that no WRONG signal is supplied from the detecting circuit 58. At a lapse of a predetermined period in this state, the microcomputer 43 resets the swingable plate 61 and the detecting circuit 58 stops the motor 14 from being driven, and terminated a control of returning coins. If the returning button 12 is pressed immediately after pressing the coin number specifying buttons 9 to 11, the microcomputer 43 effects not only the above coin returning control but also an extra control of returning coins corresponding to the specified number from the hopper apparatus 17 to the coin saucer 18. The operation of the coin supply device in accordance with the present invention will be described next referring to Figs. 4 to 7. The coins 16 as put in the coin containing portion 8 are placed on the first belt 30 and lap one over another. Upon pressing the coin number specifying button 11 for three coins for example, the motor 41 is driven to drive the drive rollers 35 and 37 via the timing belt 40. Therefore, both transport belts 30 and 31 are moved in the direction of the arrows. Because the first belt 30 is inclined, upper coins of the lapping coins 16 as put in are slipped on lower coins toward the guide wall 32, so that some of them will be reliably in contact with the guide wall 32 as illustrated in Fig. 2 in a state of lying on the belt 30. Even when the coins 16 fail to slide down toward the guide wall 32, due to friction between the coins 16 and the belt 30, the coins 16 are brought in contact with, and guided by, the guide wall 32 during a transport till the separating roller 47, because the guide wall 32 is formed to be oblique relative to the transport direction. The drive roller 35 transmits rotation to the separating roller 47 via the belt 45 for the counterclockwise direction, and to the nip roller 57 via the gear for the clockwise direction. When three coins 16a to 16c lapping together are transported near to the separating roller 47 on the first belt 30 as illustrated in Fig. 4, the upper two coins 16b and 16c are in contact with the roller cylinders 47c and pushed back as illustrated in Fig. 5. The lowest coin 16a is in no contact with the roller cylinders 47c and is advanced thereunder by the first belt 30. When the rear end of the coin 16a is moved to the position below the separating roller 47, the second lowest coin 16b is slipped down from the upper surface of the lowest coin 16a as illustrated in Fig. 6. The front end of the coin 16a is at this moment in contact with the surface of the second belt 31, and pressed by the nip roller 57 against the second belt 31. The coin 16a in transport on the second belt 31 is kept from contact with the sensor holder 56 as illustrated in Fig. 7 and passes below it. The coins 16 in transport on the second belt 31 passes exactly below the magnetic sensor 55, due to the inclination of the guide wall 32 relative to the second belt 31. The second belt 31 is moved at the speed higher than the first belt 31, so that it is possible to enlarge intervals of coins 16 in line as illustrated in Fig. 8. The magnetic sensor 55 thus can detect the individual coins 16. Although the coin supply device 13 incorporated in the slot machine 2 is described according to the above embodiment, the coin supply device may be also used in other gaming machines, a vending machine, or a coin-operated machine of any kind. Although the present invention has been fully described by way of the preferred embodiment thereof with reference to the accompanying drawings, various changes and modifications will be apparent to those having skill in this field. Therefore, unless otherwise these changes and modifications depart from the scope of the present invention as defined by the claims, they should be construed as included therein.

Claims: A coin supply device for supplying a coin-operated machine with coins one by one, comprising: a coin containing portion (8) to receive plurality of manually inserted coins; a first transport belt (30) connected round a first downstream roller (35) and a second upstream roller (36) for transporting said coins supplied from said coin containing portion (8); a first guide wall (32) provided along a direction of transport of said first transport belt substantially upright relative to said first transport belt; and a separating roller (47) provided close to said transport belt (30) and for rotating in the same direction as said downstream roller (35) in order to allow to pass a lowest coin of said supplied coins lapping one over another on said first transport belt (30) to be supplied to said coin-operated machine and to push back coins lapping over said lowest coin, characterised in that the separating roller (47) is positioned above and directly opposite the first downstream roller (35) and defines with said first transport belt (30) a spacing of between substantially the thickness and twice the thickness of a coin of a predetermined kind at the point where the first transport belt (30) passes around the first downstream roller (35). A coin supply device as claimed in claim 1, wherein said supplied coins are transported lying on said first transport belt (30). A coin supply device as claimed in claim 1 or 2, wherein said coin-operated machine is a slot machine, which incorporates said first transport belt (30), said first guide wall (32) and said separating roller (47), and on which said coin containing portion (8) is externally exposed. A coin supply device as claimed in claim 1, 2 or 3, further comprising guide means (47e) disposed face to face with said first guide wall (32) for preventing two coins situated laterally relative to said transport direction from passing under said separating roller (47). A coin supply device as claimed in claim 4, wherein said guide means (47e) is a side roller portion formed integrally with said separating roller (47). A coin supply device as claimed in any one of the preceding claims, further comprising a second transport belt (31) disposed to be downstream from said first transport belt (30) for receiving and transporting said coins fed one by one through said spacing, said second transport belt (31) being driven at a speed higher than said first transport (30) in order to enlarge intervals of said coins supplied from said first transport belt (30). A coin supply device as claimed in claim 6, further comprising a motor (41) and a drive belt (40) driven by said motor (41) for driving said first (30) and second (31) transport belts and said separating roller (47). A coin supply device as claimed in claim 7, wherein said drive belt (40) is connected round said downstream roller (35), which rotates to drive said first transport belt (30). A coin supply device as claimed in claim 6, further comprising: a sensor (55) disposed over said second transport belt (31) for supplying a signal corresponding to a coin passed thereunder; judging means (58) for judging whether said passed coin is said predetermined kind in accordance with said coin signal received from said sensor (55); and changeover means (61) for changing over a direction of feeding said passed coin transported by said second transport belt (31) in accordance with a result of judgment in said judging means (58). A coin supply device as claimed in claim 9, wherein said direction changeover means (61) includes: a first coin chute (14) disposed in a position downstream from said second transport belt (31) for passing coins towards a hopper apparatus (17) of said slot machine; a second coin chute (15) disposed in a position downstream from said second transport belt (31) beside said first coin chute (14) for passing coins toward a coin outlet (18) of said slot machine; a movable guide plate (61) movable for passing said coin transport by said second transport belt (31) to either of said first and second coin chutes (14,15); and means (60) for moving said movable plate (61) in accordance with said judging result in said judging means (58) so as to allow said coin passed under said sensor (55) to enter said first coin chute (14) when corresponding to said predetermined kind and to allow said passed coin to enter said second coin chute (15) when differing from said predetermined kind. A coin supply device as claimed in claim 10, further comprising control means (43,73) which counts coins judged by said judging means (55) as said predetermined kind. A coin supply device as claimed in claim 11, further comprising a plurality of manually operable coin number specifying switches (9-11) provided corresponding to numbers of coins to be played in one game for being operated to specify said numbers of coins to be fed to said hopper apparatus (17) at once, said control means (43) controlling said movable plate (61) and said first said second transport belts (30,31) in accordance with a coin number signal supplied from either of said coin number specifying switches (9-11) in order to feed said specified number of coins to said hopper apparatus (17). A coin supply device as claimed in claim 12, further comprising a manually operable returning switch (12) for being operated to feed all said supplied coins to said coin outlet (18), said control means (43) controlling said movable plate (61) and said first and second transport belts (30,31) in accordance with a returning signal supplied from said returning switch (12). A coin supply device as claimed in any one of the preceding claims, wherein: said first transport belt (30) is positioned in a widthwise inclination so that the lateral edge of a side of said first guide wall (32) is lower than a lateral edge of an opposite side in order to situate said coins on said side of said first guide wall (32); and the first guide wall (32) extends across the surface of the first transport belt (30) obliquely to the direction of movement thereof and towards the middle of the first transport belt (30) to define, in use, the direction of movement of said supplied coins from a lateral side by contact with the supplied coins during transport on the first transport belt (30). A coin supply device as claimed in any one of the preceding claims, further comprising: a partition wall (48) provided close to said separating roller (47) substantially over said separating roller (47) with a spacing less than the said thickness to prevent said coins from passing over said separating roller (47); at least one annular groove (47a,b) formed around said separating roller (47), a width of said annular groove (47a,b) in an axial direction being smaller than a diameter of said predetermined kind of coin; and at least one projecting portion (48a,b) formed on said partition wall (48) to extend into said annular groove (47a,b) in order to prevent said coins in cooperation with said annular (47a,b) groove from advancing between said partition wall (48) and said separating roller (47). A coin supply device as claimed in claim 15, wherein at least one roller cylinder (47c) defined beside said annular groove (47a,b) on a surface of said separating roller (47) has a width in the axial direction smaller than said diameter of said predetermined kind of coin. A coin supply device as claimed in any one of the preceding claims, further comprising: a second wall (33) provided along said transport direction of said first transport belt (30) substantially upright relative to said first transport belt (30) for defining a space with said first guide wall (32) for reserving said coins therebetween; and a guide portion (50) formed on said second wall (33) to project toward said separating roller (47), said guide portion (50) having an upper surface inclined in a degree larger than said inclination of said first transport belt (30) in order to cause coins advancing to a position between said separating roller (47) and said second wall (33) to slip toward a position directly upstream from said separating roller (47).

Inventors: SHIRASAWA MASAHARU, SHIRASAWA, MASAHARU
Applicants: UNIVERSAL KK, KABUSHIKI KAISHA UNIVERSAL
Application year: 1991
Main classification: G07F1
IPC codes: G07F1, A63F9, G07D9, A63F5, A63F7