Game ball polishing device

Abstract

To provide a game ball polishing device that enables miniaturization, and also facilitates maintenance, and thereby is suited to be provided in a game ball sealing type game machine.SOLUTION: A game ball polishing device includes: at least 3-cylindrical polishing rolls 2, 3, 4; a pair of rotational support boards 5a, 5b for supporting both ends of each polishing roll so that a game ball passage 11 surrounded by each polishing roll may be formed in a central part; and an electrical drive source 6. A pinion 8a is formed concentrically integrally in each polishing roll 2, 3, 4. A ring-shaped driving gear 10a with an internal tooth 10c formed therein is arranged so as to be commonly engaged to each pinion. The driving gear 10a is rotationally driven by the electrical drive source 6. Thereby, game balls p passing the game ball passage 11 are brought into contact with the polishing rolls 2, 3, 4, and are polished.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a polishing device for keeping the game balls used in gaming machines such as pachinko machines, arrange ball gaming machines, and mahjong ball gaming machines in a constant state of cleanliness, and in particular to a game ball polishing device for enclosed gaming machines in which a certain number of game balls are circulated within the gaming machine to play the game. [Background technology]

[0002] Generally, pachinko parlors have many gaming machines lined up next to each other on a device called an island stand, and large equipment for circulating the gaming balls is installed on the island stand. A polishing device is installed in the circulation path of the gaming balls, and by polishing the circulating gaming balls, the gaming balls are always kept clean. For example, the pachinko ball polishing and lifting machine shown in Patent Document 1 below has a polishing cloth arranged to face the ascending side of an endless hoisting belt that is driven in the vertical direction, so that the game balls are clamped at the appropriate pressure between the hoisting belt and the polishing cloth and lifted upwards, the polishing cloth is formed endless and arranged to be rotatable in the vertical direction, and a cleaning means for the polishing cloth is provided on the descending side of the polishing cloth. In this device, the polishing cloth is made endless and rotates slowly, and dirt adhering to the polishing cloth is removed by a cleaning means such as a brush at the same time as the game balls are lifted, so that the polishing cloth can be kept clean for a long time.

[0003] On the other hand, in a gaming machine with enclosed gaming balls, such as that shown in Patent Document 2 below, a predetermined number of gaming balls enclosed within the gaming machine are sequentially launched from a launch position onto a gaming board to play, and after the game has been played with, the gaming balls are circulated back to the launch position within the gaming machine without being discharged to the outside. The number of balls launched, the number of winning balls, the number of balls held by the player, etc. are counted electronically, which has the advantage that the gaming balls never come into contact with the player's hands, there is no need to bother with exchanging them for prizes, and cheating is less likely to occur. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 9-173617 [Patent Document 2] Patent No. 4943227 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, the above-mentioned enclosed game ball type gaming machines, unlike conventional gaming machines installed on an island stand, can be freely arranged (laid out), and therefore their convenience is being reevaluated in recent years. On the other hand, even in such a game machine with enclosed game balls, the game balls collide violently repeatedly with various components in the machine, and become dirty with small pieces of broken resin or metal, debris, powder, oil, etc., so it is necessary to provide a polishing device in the machine to polish the game balls, but in that case, since it is necessary to provide a polishing device for each game machine, there is a problem that the maintenance is not easy. That is, for example, in a polishing device structured to press a polishing member (such as a cloth or brush) against the game ball with an elastic member such as a spring, as shown in the above Patent Document 1, it is difficult to set the pressing force, and if the elasticity of the polishing member is lost during use, the game balls will not be polished well, or broken resin pieces, etc. will be caught and the function will stop, and the game balls will suddenly stop circulating during play, interrupting the game, which may cause great inconvenience to the player.

[0006] In addition, in conventional polishing devices such as that shown in Reference 1, the game ball sandwiched between the upward moving hoisting belt and the polishing member rotates only upwards, so the game ball is only polished in a certain circumferential direction on its surface. This causes problems such as unevenness in the polished area despite a long hoisting distance, and the device is large and therefore difficult to install inside a gaming machine. [Means for solving the problem]

[0007] In order to solve the above problems, the game ball polishing device of the present invention rotatably supports a cylindrical polishing roll by a pair of rotating support plates having a through hole in the center through which the game ball can pass, and is equipped with an electric drive source that rotates the polishing roll, and is characterized in that a game ball passage through which the game ball passes is formed between the through holes of the rotating support plates, and by passing the game ball through the game ball passage, the game ball comes into contact with the polishing roll and is polished. In addition, the game ball polishing device of the present invention comprises at least three cylindrical polishing rolls, a pair of rotating support plates supporting both ends of each polishing roll so that a game ball passage surrounded by each polishing roll is formed in the center, and an electric drive source, and is characterized in that a small gear is integrally formed concentrically with each polishing roll, a ring-shaped transmission gear with internal teeth is arranged to commonly mesh with each of the small gears, and the transmission gear is rotated and driven by the electric drive source so that game balls passing through the game ball passage come into contact with the polishing rolls and are polished.

[0008] In addition, the present invention is characterized in that in the above-mentioned game ball polishing device, a rotating support plate supports each of the polishing rolls so that the polishing rolls can be supported so as to be swingable toward the game ball passage. This allows the game balls to be polished evenly and cleanly at all times, and also allows for flexible handling even if foreign matter such as resin pieces gets caught.

[0009] Furthermore, in the above-mentioned game ball polishing device, the game ball passage is surrounded by the polishing rolls to form an upwardly-standing vertical type, and a ball feeding device is disposed at the lower part of the game ball passage which lifts the game balls in an aligned state into the game ball passage by rotating a sprocket, and a game ball feeding gutter is formed on the inflow side of the ball feeding device in which a larger number of game balls are lined up than on the outflow side. As a result, the weight of the game balls waiting in the game ball feeding trough acts on the ball feeding device, reducing the load on the ball feeding device.

[0010] In addition, the present invention is characterized in that in the above-mentioned game ball polishing device, only the transmission gear that meshes with the small gear formed on one end of each polishing roll is rotated and driven by the electrical drive source. As a result, each polishing roll is inclined in the circumferential direction, improving the polishing action and keeping the game balls cleaner, while also making maintenance easier. Effect of the Invention

[0011] According to the present invention, game balls can be polished evenly and neatly, the device can be made compact, and maintenance is easy, so that a game ball polishing device that is particularly suitable for enclosed game ball gaming machines can be provided. [Brief description of the drawings]

[0012] [Figure 1] 1 is a front view of a first embodiment of a game ball polishing device according to the present invention. [Diagram 2] 1 is a perspective view of a first embodiment of a game ball polishing device according to the present invention. [Diagram 3] 1 is an exploded perspective view of a first embodiment of a game ball polishing device according to the present invention. [Figure 4] 1 is a perspective view of a polishing roll of a game ball polishing device according to a first embodiment of the present invention. [Diagram 5] 1 is a perspective view of a rotating support plate and a transmission gear of a game ball polishing device according to a first embodiment of the present invention. [Figure 6] 1 is a perspective view of a rotating support plate and a transmission gear of a game ball polishing device according to a first embodiment of the present invention. [Figure 7] 1 is a horizontal cross-sectional view of a rotating support plate and a transmission gear of a game ball polishing device according to a first embodiment of the present invention. [Figure 8] 1 is a front view of a main part of a second embodiment of a game ball polishing device according to the present invention. [Figure 9] A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 8. [Figure 10] 1 is a perspective view of a main part of a second embodiment of a game ball polishing device according to the present invention; [Figure 11] A partial cross-sectional side view of the main parts of the game ball polishing device shown in Figure 10. [Figure 12] A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 10. [Figure 13] 1 is a perspective view of a main part of a second embodiment of a game ball polishing device according to the present invention; [Figure 14] A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 13.

[0013] [Embodiment 1] Next, a first embodiment of the present invention shown in Figs. 1 to 7 will be described. Figs. 1 and 2 show the entirety of this game ball polishing device. The polishing device body 1 comprises three cylindrical polishing rolls 2, 3, and 4, and a pair of rotating support plates 5a and 5b, and an electric drive source 6 is provided beside them. A ball feed device 15 is disposed at the lower part of the polishing device body 1, and a game ball feed gutter 16 is formed on the inlet side of the ball feed device 15. A stand 17 is provided to support the game ball feed gutter 16, the polishing device body 1, the electric drive source 6, and the like.

[0014] Each of the polishing rolls 2, 3, 4 is made of a resin material having self-lubricating properties and a low coefficient of friction, and as shown in FIG. 4, vertical stripes are formed on the outer peripheral surface, and small gears 8a, 8b are integrally formed concentrically near both ends. The ends 9a, 9b of each of the polishing rolls 2, 3, 4 are formed in a round-tipped shaft shape. The rotating support plates 5a, 5b are a pair of identical circular plates, and as shown in FIGS. 5 and 6, a through hole 5c is formed in the center through which the game ball p can pass, and three non-through bearing holes 5d are formed on one side so as to be arranged at equal intervals on a concentric circle having a larger diameter than the through hole 5c, and a circular receiving groove 5e is formed on the same side so as to follow the outer peripheral edge of the rotating support plates 5a, 5b. The through hole 5c is substantially circular, but as shown in Fig. 7, it is formed into a distorted circle with the inner diameter slightly expanded only in the direction of the bearing hole 5d so that the movement of the game ball p is slightly permitted in that direction. The bearing hole 5d rotatably supports both ends 9a, 9b of the polishing rolls 2, 3, 4, and is formed into an oblong shape that is slightly longer in the direction of the through hole 5c so that the polishing rolls 2, 3, 4 can move slightly in the direction of the through hole 5c (indicated by arrow A) when supporting them, as shown in Fig. 7.

[0015] In addition, the ring-shaped transmission gears 10a, 10b have internal teeth 10c formed on their inner peripheral surface and external teeth 10d formed on their outer peripheral surface, and a circular protrusion 10e that fits loosely into the circular receiving groove 5e is formed on one side. By arranging the transmission gears 10a, 10b on the upper and lower surfaces of the rotating support plates 5a, 5b, respectively, the transmission gears 10a, 10b are arranged so that they can rotate freely relative to the rotating support plates 5a, 5b, and the internal teeth 10c mesh with the small gears 8a, 8b of the three grinding rolls 2, 3, 4.

[0016] As shown in Fig. 3, the game ball sending gutter 16 is formed into an approximately L-shape by screwing a gutter cover 16b to the front of a gutter body 16a that is approximately U-shaped and formed on a stand 17, and a game ball storage section 16c is formed at the upper end of the game ball sending gutter 16. When game balls p, such as out balls and winning balls, that flow down the game board of a game machine (not shown) flow into the game ball storage section 16c, the game balls p line up in a row in the game ball storage section 16c and flow down the game ball sending gutter 16. The height of the game ball sending gutter 16 is set so that the game ball storage section 16c is higher than the grinding device body 1, and the game balls p flow down the game ball sending gutter 16 by their own weight and flow into the ball sending device 15 provided at the downstream end of the game ball sending gutter 16.

[0017] The ball sending device 15 is formed by forming a U-shaped curved surface portion 16d integrally with the lower end of the gutter body 16a, fixing the sprocket 16e to the rotation output shaft of the motor 16f so that the sprocket 16e is located at the center of curvature of the curved surface portion 16d, and forming a cover portion 16g that covers the sprocket 16e at the lower end of the gutter cover 16b, thereby forming a U-shaped ball flow path at the downstream end of the game ball sending gutter 16. Then, by rotating the sprocket 16e by the motor 16f, the game ball p that has flowed down the game ball sending gutter 16 is held in a plurality (six places) of recesses 16j formed at equal intervals on the outer periphery of the sprocket 16e, so that the game ball p rotates along this U-shaped ball flow path and is forcibly sent upward, and flows out through the game ball passage 11 described later to the game ball outflow gutter 18 located above. At the very end of the outlet side of this U-shaped ball flow passage, support portion 16h and support portion 16i for supporting the rotating support plate 5a so that it can rotate in a horizontal plane are formed integrally with the gutter main body 2a and the gutter cover 2b, respectively.

[0018] The electric drive source 6 has a box body 6a fixed on the ball feed trough 16, a motor 6b fixed on the box body 6a has a rotating output shaft protruding into the box body 6a, and a small diameter gear 6c fixed to the rotating output shaft. A transmission shaft 6d is disposed adjacent to the box body 6a so as to be aligned along the vertical direction of the ball passage 11 of the grinding machine main body 1 described later, and transmission intermediate gears 6e and 6f are fixed to both ends of the transmission shaft 6d, with one transmission intermediate gear 6e meshing with the small diameter gear 6c and the external teeth 10d of the transmission gear 10a, and the other transmission intermediate gear 6f meshing with the external teeth 10d of the transmission gear 10b. At this time, the upper and lower ends of the transmission shaft 6d are supported vertically upright and rotatable on the lower surface of the ball outlet trough 18 and the upper surface of the ball feed trough 16, respectively. Therefore, when the small diameter gear 6c rotates in the direction of arrow B in FIG. 7 by the rotational drive of the motor 6b, the transmission intermediate gears 6e and 6f rotate in the direction of arrow C, and the transmission gears 10a and 10b are rotationally driven in the direction of arrow D.

[0019] Further, a support 17a is erected on the stand 17, a gutter body 17b is formed on the support 17a, a gutter cover 18a is screwed to the front of the gutter body 17b to form a game ball outflow gutter 18, and a support part 17c and a support part 18b for supporting the rotating support plate 5b rotatably in a horizontal plane are formed on the gutter body 17b and the gutter cover 18a. The rotating support plate 5a is supported rotatably in a horizontal plane on the support parts 16h and 16i, and the rotating support plate 5b is disposed rotatably in a horizontal plane below the support parts 17c and 18b, and the polishing rolls 2, 3, and 4 are supported rotatably between the rotating support plate 5a and the rotating support plate 5b by receiving both ends 9a and 9b in the bearing holes 5d of the rotating support plate 5a and the bearing holes 5d of the rotating support plate 5b, respectively. As a result, a game ball passage 11 surrounded by the grinding rolls 2, 3, and 4 is formed in the center in an upwardly-standing vertical shape, and the rotating support plates 5a and 5b are arranged so as to be rotatable on a surface perpendicular to the game ball passage 11, and in this state, the internal teeth 10c of the transmission gears 10a and 10b arranged so as to be slidable on the surfaces of the rotating support plates 5a and 5b are commonly engaged with the small gears 8a and 8b. Then, the game balls p pushed up by the ball feeding device 15 flow into the game ball passage 11, and the game balls p are discharged through the game ball passage 11 to the game ball outlet gutter 18. A rotating disk 19a is provided coaxially with the sprocket 16e, and multiple (six) slits 19b are formed on the outer periphery of the rotating disk 19a at equal intervals, just like the sprocket 16e, and an optical sensor 19 is provided to detect the slits 19b, thereby detecting the rotation of the rotating disk 19a and the sprocket 16e and detecting the number of game balls p pushed up by the ball feeding device 15. A sensor (not shown) that confirms the passage of the game balls p is provided in the game ball outlet gutter 18, and the game balls p flowing through the game ball outlet gutter 18 are always detected one by one by the optical sensor 19 and the electric signal obtained from the sensor.

[0020] 7, the internal teeth 10c of the transmission gears 10a, 10b exert a force to rotate the polishing rolls 2, 3, 4 in the direction of the arrow E via the pinion gears 8a, 8b, and at the same time exert a force to push the polishing rolls 2, 3, 4 toward the game ball passage 11 of the arrow A. At this time, since the bearing holes 5d of the rotary support plates 5a, 5b are formed as elongated holes that are long in the direction of the game ball passage 11, the polishing rolls 2, 3, 4 move toward the arrow A, and the polishing rolls 2, 3, 4 also rotate in the direction of the arrow E while contacting the surface of the game ball p flowing through the game ball passage 11 with an appropriate pressure. In addition, when the frictional resistance with the game ball p increases during the rotation, the rotating support plates 5a, 5b also rotate freely, so that the polishing rolls 2, 3, 4 revolve around the game ball passage 11 in the direction of arrow D together with the transmission gears 10a, 10b and the rotating support plates 5a, 5b. Therefore, the game ball p flowing through the game ball passage 11 is always clamped between the polishing rolls 2, 3, 4 with an appropriate pressure, and the polishing rolls 2, 3, 4 contact the surface of the game ball p without any bias. In this state, the game ball p is forced to move upward through the game ball passage 11 by the operation of the ball feed device 15, so that dirt on the surface of the game ball p is evenly removed, and the game ball p is discharged into the game ball discharge gutter 18 in a clean state. In this way, the game ball p is polished by being sandwiched between the three polishing rolls 2, 3, 4. Even if the total length of each of the polishing rolls 2, 3, 4 is set to be relatively short, sufficient polishing and cleaning action is exhibited, and the overall size can be reduced. This makes it suitable for being built into a game ball sealed game machine. In the case of a game ball sealed game machine, the game balls flowing out from the game ball discharge gutter 18 fall into the game ball launching position of a launching device (not shown), and are launched onto the game board by the player's launching operation, and are recirculated. In addition, by forming vertical stripes on the outer peripheral surface of each polishing roll 2, 3, 4 as described above, the friction with the surface of the game ball p is kept at a constant level, promoting the cleaning action.

[0021] In this embodiment 1, the bearing holes 5d for receiving the both ends 9a, 9b of the polishing rolls 2, 3, 4 are formed as elongated holes, but they may be formed as large-diameter bearing holes that provide room for the movement of the both ends 9a, 9b. By supporting the polishing rolls 2, 3, 4 so that they can swing, even if a foreign object such as a piece of resin enters and gets stuck between the game ball p and the polishing rolls 2, 3, 4, the polishing rolls 2, 3, 4 can be retracted, so that the polishing rolls 2, 3, 4, the transmission gears 10a, 10b, the electric drive source 6, etc. are not subjected to excessive load, and unnecessary stoppage or damage due to this is avoided. Moreover, by driving the transmission gears 10a, 10b to rotate, the grinding rolls 2, 3, 4 rotate or revolve, or revolve while rotating, so the load on the electric drive source 6, etc. is constantly reduced, and the occurrence of troubles such as stagnation of the circulation of the game balls p during play and interruption of the game is avoided. Also, even if a foreign object gets caught and stops, the grinding rolls 2, 3, 4 are supported so as to be able to swing, so that the gap between the grinding rolls 2, 3, 4 can be widened to easily remove the foreign object manually, and maintenance is also easy, so that the device is particularly suitable for installation in a game ball enclosed game machine.

[0022] In this game ball polishing device, the game ball passage 11 is formed vertically by the polishing rolls 2, 3, 4, and the ball feed device 15 that lifts the game balls in an aligned state to the game ball passage 11 by rotating the sprocket 16e is disposed at the lower part of the game ball passage 11, and a game ball feed trough 16 is formed in which a larger number of game balls p are connected to the inlet side of the ball feed device 15 than to the outlet side. Therefore, the gravity of the many game balls p connected to the game ball feed trough 16 is balanced with the gravity of the game balls p lifted to the game ball passage 11 through the ball feed device 15, and the lifting of the game balls p by the ball feed device 15 is performed smoothly with a light load. Therefore, the sprocket 16e and the motor 16f of the ball feed device 15 can be made smaller, and the parts cost can be reduced. As shown in this embodiment, the game ball feed trough 16 6 The game ball passage 1 1By forming it so as to extend to an even higher place than the ball feeding channel 16, the weight of the numerous game balls p waiting in the ball feeding channel 16 is placed on the ball feeding device 15, thereby further reducing the load on the ball feeding device 15.

[0023] [Embodiment 2] Next, a second embodiment of the game ball polishing device according to the present invention will be described with reference to FIGS. In this embodiment 2, only the transmission gear 10a meshing with the pinion gear 8a formed on one end of each of the polishing rolls 2, 3, 4 in embodiment 1 is rotated and driven by the electric drive source 6. That is, in this embodiment 2, the pinion gear 8b, the transmission gear 10b, and the transmission intermediate gear 6f in embodiment 1 are eliminated, and each of the polishing rolls 2, 3, 4 is driven only by one of the transmission intermediate gears 6e and the transmission gear 10a. Accordingly, the pinion gear 8b of each of the polishing rolls 2, 3, 4 becomes unnecessary, and is not shown in this embodiment 2. 8 to 14, the same parts as those in embodiment 1 are given the same reference numerals and detailed description will be omitted, but in this embodiment 2, when the transmission intermediate gear 6e is rotationally driven to rotate one of the transmission gears 10a in the direction of arrow F in Fig. 10, the rotational force acts on the rotating support plate 5a, but no such rotational force acts on the other rotating support plate 5b, so that only the rotating support plate 5a first rotates slightly in the direction of arrow F. As a result, the polishing rolls 2, 3, 4, which were vertical as shown in Fig. 8 and Fig. 9, become inclined in the circumferential direction as shown in Figs. 10 to 12.

[0024] When the polishing rolls 2, 3, 4 are inclined in this manner, the polishing rolls 2, 3, 4 come into contact with the game ball p in the game ball passage 11 surrounded by the polishing rolls 2, 3, 4 with an appropriate pressure, and in this contact state, the polishing rolls 2, 3, 4 rotate and / or revolve. Note that Figs. 13 and 14 show a state in which the polishing rolls 2, 3, 4 are inclined at an even steeper angle when there is no game ball p in the game ball passage 11, and the game ball passage 11 becomes narrower or wider depending on the inclination of the polishing rolls 2, 3, 4. For this reason, even in the game ball polishing device shown as embodiment 2, the game ball p flowing through the game ball passage 11 is always clamped between the polishing rolls 2, 3, 4 with an appropriate pressure, and the polishing rolls 2, 3, 4 come into contact with the surface of the game ball p without being biased, further improving the polishing action. Therefore, dirt on the surface of the game ball p is thoroughly removed, and the game ball p can be kept cleaner. Even if foreign matter such as resin pieces gets caught, the polishing rolls 2, 3, and 4 can be retracted by reducing the inclination angle, so that no excessive load is placed on the electric drive source 6, etc., and stoppages and damage are avoided, and trouble such as interruptions during play does not occur. Even if a foreign object gets caught and stops, in that case, the other rotating support plate 5b can be picked up by hand to return the inclined and twisted state of the grinding rolls 2, 3, and 4 to the original state, as shown in Fig. 8, and the game ball passage 11 will become wider and the interval between the grinding rolls 2, 3, and 4 will also become wider, so that the foreign object can be easily removed by hand. Therefore, the game ball grinding device of embodiment 2 can also be made compact and easy to maintain, making it suitable for installation in a game machine with enclosed game balls.

[0025] In the above-described embodiments 1 and 2, axial ends 9a, 9b are formed on the polishing rolls 2, 3, 4, and the rotating support plates 5a, 5b are provided with bearing holes 5d corresponding to the axial ends 9a, 9b, and the bearing holes 5d are made larger in diameter than the long holes or axial ends 9a, 9b, allowing the central axis of rotation of the polishing rolls 2, 3, 4 to slide and oscillate relative to the game ball p passing through the game ball passage 11. However, the polishing rolls 2, 3, 4 can also be made to oscillate relative to the game ball p passing through the game ball passage 11 by forming a support shaft on the rotating support plates 5a, 5b side, forming a bearing hole on the polishing rolls 2, 3, 4 side to receive the support shaft, and configuring the bearing hole to be larger in diameter than the support shaft so that the central axis of rotation of the polishing rolls 2, 3, 4 can slide (shift). In addition, it is preferable that the shaft-shaped tip portions 9a, 9b of the grinding rolls 2, 3, 4 and the bottom surface of the bearing hole 5d are formed with an arcuate surface or a spherical surface. By forming an arcuate surface or a spherical surface, the game ball p passing through the game ball passage 11 can be smoothly swung and tilted in the circumferential direction. In these embodiments, three cylindrical grinding rolls 2, 3, and 4 are provided, but in the present invention, four or more grinding rolls may be disposed so that the game ball passage 11 is formed. In addition, in these embodiments, the three polishing rolls 2, 3, and 4 are rotated by an electric drive source 6, but it is also possible to configure it so that at least one or two of the polishing rolls are rotated and the remaining polishing rolls are simply supported rotatably on a rotating support plate, without having to rotate all three. In short, the transmission mechanism that rotates the polishing rolls can be modified in various ways other than the configuration shown in this embodiment. In the above first and second embodiments, the game ball passage 11 is formed so as to be surrounded by three cylindrical polishing rolls 2, 3, and 4, but the game ball passage may be formed by, for example, a gutter-shaped wall facing one side of one cylindrical polishing roll, and the game ball passing through the game ball passage may be brought into contact with the polishing roll to be polished. In addition, the gutter-shaped wall is given as an example of the wall, but the wall may be made cylindrical like the polishing roll to reduce the resistance caused by contact with the game ball. In any case, the wall here refers to a wall that is supported integrally or separately from the rotating support plate in a state where it cannot rotate, and forms a game ball passage together with the polishing roll. However, as shown in the above first and second embodiments, by forming the game ball passage so as to be surrounded by three or more polishing rolls, the game ball passing through the game ball passage comes into contact with multiple polishing rolls from multiple directions at the same time, improving the polishing efficiency and making it possible to polish the game ball more evenly. [Explanation of symbols]

[0026] p...game ball, 1...polishing device body, 2,3,4...polishing roll, 5a,5b...rotating support plate, 5c...through hole, 5d...bearing hole, 5e...circular receiving groove, 6...electrical drive source, 6a...box body, 6b...motor, 6c...small diameter gear, 6d...transmission shaft, 6e,6f...transmission intermediate gear, 8a,8b...small gear, 9a,9b...end, 10a,10b...transmission gear, 10c...internal teeth, 10d...external teeth, 10e...circular protrusion, 11...game ball passage, 15...ball feeding device, 16...game ball feeding gutter, 16a...gutter body, 16b...gutter cover, 16c...game ball storage section, 16d...curved surface section, 16e...sprocket, 16f...motor, 16g...Cover portion, 16h, 16i...Support portion, 16j...Recess portion, 17...Stand, 17a...Support column, 17b...Gutter body, 17c...Support portion, 18...Game ball outlet gutter, 18b...Support portion, 18a...Gutter cover, 19...Optical sensor, 19a...Rotating disk, 19b...Slit

Claims

1. A cylindrical polishing roll is rotatably supported by a pair of rotating support plates each having a through hole formed in the center through which the game ball can pass, and an electric drive source is provided for rotating the polishing roll, and a game ball passage through which the game ball passes is formed between the through holes of the rotating support plates; The rotating support plate supports the polishing roll so that it can swing toward the game ball passage, and by passing a game ball through the game ball passage, the game ball comes into contact with the polishing roll and is polished.

2. A game ball polishing device comprising at least three cylindrical polishing rolls, a pair of rotating support plates supporting both ends of each polishing roll so that a game ball passage surrounded by each polishing roll is formed in the center, and an electric drive source, wherein a small gear is integrally formed concentrically on each polishing roll, a ring-shaped transmission gear having internal teeth is arranged to mesh with each of the small gears in common, and the transmission gear is rotated and driven by the electric drive source so that game balls passing through the game ball passage come into contact with the polishing rolls and are polished.

3. 3. The game ball polishing device according to claim 2, wherein the rotating support plate supports each of the polishing rolls so as to be swingably supported toward the game ball passage.

4. A game ball polishing device as described in claim 2 or 3, characterized in that the game ball passage is surrounded by each of the polishing rolls to form an upwardly standing vertical type, a ball feeding device which lifts the game balls in an aligned state into the game ball passage by rotating a sprocket is disposed at the lower part of the game ball passage, and a game ball feeding trough in which a large number of game balls are lined up in an aligned state is formed on the inflow side of the ball feeding device so as to extend to a higher position than the game ball passage.

5. A game ball polishing device as described in any one of claims 2 to 4, characterized in that only the transmission gear that meshes with the small gear formed at one end of each polishing roll is rotated and driven by the electrical drive source.

Images