JP7612191B2 - Game ball polishing device - Google Patents

Description

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 ball polishing device for enclosed gaming machines that circulate a fixed number of game balls within the gaming machine to allow play to be performed.

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, and the game balls are clamped at an 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.

On the other hand, for example, in a game machine with enclosed game balls, such as that shown in Patent Document 2 below, a predetermined number of game balls enclosed within the game machine are sequentially launched from a launch position onto the game board to play, and after the game has finished, the game balls are circulated back to the launch position within the game machine without being discharged to the outside. The number of balls launched, the number of winning balls, and the number of balls held by the player are counted electronically, which has the advantage that the game balls do not come into contact with the player's hands, there is no need to go through the trouble of exchanging them for prizes, and cheating is less likely to occur.

JP 9-173617 A Patent No. 4943227

Incidentally, the above-mentioned enclosed game ball type gaming machines differ from conventional gaming machines installed on island stands in that they can be freely arranged (laid out), and in recent years their convenience has been reevaluated.
On the other hand, even in such a game machine with enclosed game balls, the game balls collide violently against various components in the machine repeatedly, and become dirty with small pieces of 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, it is necessary to provide a polishing device for each game machine, so 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 a broken piece of resin, 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.

In addition, in conventional polishing devices such as those shown in Reference 1, the game balls sandwiched between the upward moving lifting belt and the polishing member only rotate upwards, so the game balls are only polished in a certain circumferential direction on their surfaces. This causes problems such as uneven polishing of the polished areas despite the long lifting distance, and the large size of the device makes it difficult to install inside a gaming machine.

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.

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.

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.

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.

The present invention provides a game ball polishing device that can polish game balls evenly and neatly, can be made compact, and is easy to maintain, making it particularly suitable for enclosed game ball gaming machines.

1 is a front view of a first embodiment of a game ball polishing device according to the present invention. 1 is a perspective view of a first embodiment of a game ball polishing device according to the present invention; 1 is an exploded perspective view of a first embodiment of a game ball polishing device according to the present invention; 1 is an oblique view of a polishing roll of a game ball polishing device according to a first embodiment of the present invention. FIG. 1 is an oblique 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. 1 is an oblique 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. A horizontal cross-sectional view of a rotating support plate and a transmission gear of embodiment 1 of the game ball polishing device of the present invention. A front view of the main parts of embodiment 2 of the game ball polishing device according to the present invention. A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 8. 1 is a perspective view of a main part of a game ball polishing device according to a second embodiment of the present invention; A partial cross-sectional side view of the main parts of the game ball polishing device shown in Figure 10. A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 10. 1 is a perspective view of a main part of a game ball polishing device according to a second embodiment of the present invention; A plan view showing the state of the polishing roll of the game ball polishing device shown in Figure 13.

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

Each of the polishing rolls 2, 3, and 4 is made of a resin material that is self-lubricating and has a low coefficient of friction. As shown in FIG. 4, vertical stripes are formed on the outer peripheral surface, and small gears 8a and 8b are integrally formed concentrically near both ends. The ends 9a and 9b of each of the polishing rolls 2, 3, and 4 are formed in the shape of a rounded shaft. The rotating support plates 5a and 5b are a pair of identical circular plates, and as shown on both sides in FIG. 5 and FIG. 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 with a diameter larger than that of 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 and 5b. The through hole 5c is generally circular, but as shown in Fig. 7, the inner diameter of the through hole 5c is slightly expanded in the direction of the bearing hole 5d so that the movement of the game ball p is allowed slightly in that direction only, forming a distorted circle. The bearing hole 5d supports both ends 9a and 9b of the polishing rolls 2, 3, and 4 so that they can rotate freely, but is formed as a slightly elongated hole in the direction of the through hole 5c so that the polishing rolls 2, 3, and 4 can move slightly in the direction of the through hole 5c (indicated by arrow A) when supporting them, as shown in Fig. 7.

The ring-shaped transmission gears 10a and 10b have internal teeth 10c formed on their inner circumferential surface and external teeth 10d formed on their outer circumferential surface, and a circular ridge 10e that fits loosely into the circular receiving groove 5e is formed on one side. The transmission gears 10a and 10b are disposed on the upper and lower surfaces of the rotating support plates 5a and 5b, respectively, so that the transmission gears 10a and 10b are disposed so as to be rotatable relative to the rotating support plates 5a and 5b, and the internal teeth 10c mesh with the pinion gears 8a and 8b of the three grinding rolls 2, 3, and 4.

As shown in FIG. 3, the game ball feed gutter 16 is formed into an approximately L-shape by screwing a gutter cover 16b to the front of the approximately U-shaped gutter body 16a formed on the stand 17, and a game ball storage section 16c is formed at the upper end of the game ball feed 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 feed gutter 16. The height of the game ball feed gutter 16 is set so that the game ball storage section 16c is higher than the grinding device main body 1, and the game balls p flow down the game ball feed gutter 16 under their own weight and into the ball feed device 15 provided at the downstream end of the game ball feed gutter 16.

The ball feed 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 positioned 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 feed gutter 16. Then, by rotating the sprocket 16e by the motor 16f, the game ball p that has flowed down the game ball feed gutter 16 is held in multiple (six) recesses 16j formed at equal intervals on the outer periphery of the sprocket 16e, and the game ball p is forced to rotate along this U-shaped ball flow path and be sent upward, and is discharged through the game ball passage 11 described later to the game ball discharge gutter 18 located above. At the very end of the outlet side of this U-shaped ball flow path, support parts 16h and 16i are formed integrally with the gutter body 2a and gutter cover 2b, respectively, to support the rotating support plate 5a so that it can rotate in a horizontal plane.

The electric drive source 6 has a box body 6a fixed on the game 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. Next to the box body 6a, a transmission shaft 6d is arranged along the vertical direction of the game ball passage 11 of the grinding device 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 game ball outlet trough 18 and the upper surface of the game ball feed trough 16, respectively. Therefore, when the small diameter gear 6c rotates in the direction of arrow B in FIG. 7 due to 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 rotated in the direction of arrow D.

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 portion 17c and a support portion 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 portions 16h and 16i, and the rotating support plate 5b is disposed rotatably in the horizontal plane below the support portions 17c and 18b, and the polishing rolls 2, 3, and 4 are rotatably supported 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 freely 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 sending 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) is provided in the game ball outlet gutter 18 to confirm the passage of the game balls p, 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 electrical signal obtained from the sensor.

When the transmission gears 10a, 10b are driven to rotate in the direction of arrow D shown in Figure 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 arrow E via the small 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 arrow A. At this time, since the bearing holes 5d of the rotating 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 arrow A, and the polishing rolls 2, 3, 4 also rotate in the direction of arrow E while contacting the surface of the game ball p flowing through the game ball passage 11 with an appropriate pressure. Furthermore, 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 trough 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 overall 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 made small. This makes it suitable for being built into a game machine with enclosed game balls. In the case of an enclosed game machine, the game balls that flow out from the game ball discharge trough 18 flow down to the game ball launching position of the launching device (not shown), and are launched onto the game board by the player's launch operation and recirculated. In addition, by forming vertical stripes on the outer peripheral surface of each polishing roll 2, 3, 4 as described above, the cleaning action is promoted by maintaining a constant level of friction with the surface of the game ball p.

In addition, in this embodiment 1, the bearing holes 5d for supporting both ends 9a, 9b of each polishing roll 2, 3, 4 are formed as elongated holes, but even if they are not elongated holes, large-diameter bearing holes that allow room for the movement of both ends 9a, 9b may be formed. By supporting the polishing rolls 2, 3, 4 in this manner 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 stoppages and damage due to this are avoided. Moreover, by driving the transmission gears 10a and 10b to rotate, the grinding rolls 2, 3, and 4 rotate or revolve, or revolve while rotating, so the load on the electric drive source 6 and the like is constantly reduced, and problems such as the circulation of the game balls p being stagnated during play and interrupting the game are avoided. Even if a foreign object gets caught and stops, the grinding rolls 2, 3, and 4 are supported so that they can be swung, making it easy to widen the gap between the grinding rolls 2, 3, and 4 and remove the foreign object manually, and maintenance is also easy, making this device particularly suitable for use in enclosed game ball gaming machines.

In this game ball polishing device, the game ball passage 11 is formed vertically by the polishing rolls 2, 3, and 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 inflow side of the ball feed device 15 than to the outflow side, so that 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. Furthermore, as shown in this embodiment, by forming the game ball feeding trough 16 to extend to a higher position than the game ball passage 11 , the weight of the large number of game balls p waiting in the game ball feeding trough 16 is placed on the ball feeding device 15, thereby further reducing the load on the ball feeding device 15.

[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, and 4 in embodiment 1 is rotated and driven by the electric drive source 6. That is, in this embodiment 2, the pinion gear 8b, transmission gear 10b, and transmission intermediate gear 6f in embodiment 1 are eliminated, and each of the polishing rolls 2, 3, and 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, and 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 rotary support plate 5a, but no such rotational force acts on the other rotary support plate 5b, so that only the rotary 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 Figs. 8 and 9, become inclined in the circumferential direction as shown in Figs. 10 to 12.

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 Figures 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. As a result, 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 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 the machine, 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.

In the above-described embodiments 1 and 2, axial ends 9a, 9b are formed on the polishing rolls 2, 3, 4, and bearing holes 5d corresponding to the axial ends 9a, 9b are provided on the rotating support plates 5a, 5b, 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 a circular arc surface or a spherical surface is formed on the shaft-shaped tip portions 9a, 9b of the grinding rolls 2, 3, 4 and on the bottom surface of the bearing hole 5d. By forming a circular arc surface or a spherical surface, the game ball p passing through the game ball passage 11 can smoothly oscillate and tilt in the circumferential direction.
In addition, 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 arranged 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 the structure 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 for rotating 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 resistance due to contact with the game ball can be reduced by making the wall cylindrical like the polishing roll. In any case, the wall here refers to a wall that is supported integrally or separately on a 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.

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... lid, 16h, 16i... support, 16j... recess, 17... stand, 17a... support, 17b... gutter body, 17c... support, 18... ball outlet gutter, 18b... support, 18a... gutter cover, 19... optical sensor, 19a... rotating disk, 19b... slit

Claims (5)

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. 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, a small gear is integrally formed concentrically with each polishing roll, a ring-shaped transmission gear with internal teeth is disposed so as to mesh with each small gear in common, and the transmission gear is rotated 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. 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. 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 . 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 by the electrical drive source.

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