JPH0626966U - Pachinko ball ejection device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the material cost of parts, to prevent damage to parts reliably, and to improve the reliability of operation. Moreover, the stopper mechanism of the ball receiving member is unnecessary. [Structure] First and second ball receiving members 11 and 13 each having a plurality of ball receiving recesses for receiving a pachinko ball are provided rotatably on the outer peripheral portion, and the pachinko ball is provided with a first and second ball receiving member 1.
The first and second ball receiving members 1 are configured so as to be supplied from directly above the rotary shafts (driving shaft 12) 1 and 13 respectively.
A drive shaft 12 that integrally rotates 1 and 13 in a state in which the rotational phases of both are shifted, and a pachinko ball that is alternately driven from the first and second ball receiving members 11 and 13 by rotationally driving the drive shaft 12. Between the rotating shaft 18 of the motor 16 for discharging the
The worm gear mechanism 17 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pachinko ball discharging device suitable for, for example, a ball lending machine or a prize ball discharging device.

[0002]

[Prior art]

 As an example of the prize ball discharging device which is a pachinko ball discharging device of this type, there is a configuration described in Japanese Patent Laid-Open No. 3-111071. In this configuration, a ball supply path for supplying a pachinko ball from a ball tank, which is a ball supply source, is provided so as to extend in the vertical direction, and at the same time, a rotatably provided ball receiving member such as a sprocket tooth is provided. A solenoid is provided that allows the portion to project in the middle of the ball supply path and allows and blocks the rotation of the sprocket.

In the case of this configuration, by allowing the sprocket to rotate by the solenoid, the pachinko ball spontaneously drops from the top to the bottom of the ball supply path and is discharged to the ball discharge port side. By blocking the rotation of the sprocket with the solenoid, the pachinko balls are prevented from spontaneously falling by the teeth of the sprocket, so that the discharge of the pachinko balls is stopped.

[0004]

[Problems to be solved by the device]

 However, in the above conventional configuration, when the pachinko ball is ejected, the pachinko ball naturally falls and hits the tooth portion of the sprocket, so the tooth portion of the sprocket may be chipped due to the load of the pachinko ball. For this reason, the sprocket must be made of a highly durable material, which increases the material cost, and even if it is made of such a material, the fine particles that have peeled off due to the lack of teeth on the sprocket will move. There is a risk that it may stay in the main part and the operation reliability is low.

As a configuration for solving such a drawback, the applicant of the present invention supplies a pachinko ball almost directly above the rotation axis of the sprocket and drives the sprocket to rotate by a motor. We are considering a structure that ejects pachinko balls to the ball outlet side.

According to this structure, the pachinko ball comes into contact with the upper surface of the ball receiving recess of the sprocket, and most of the load of the pachinko ball acts on the rotation axis of the sprocket, so that the load acting on the teeth of the sprocket. Can be reduced, and it is possible to reliably prevent the teeth of the sprocket from being chipped. However, in the above configuration, if the power is turned off when the store is closed, the motor will be cut off and the sprocket will rotate almost freely.Therefore, the sprocket will rotate due to the load of the pachinko ball and the pachinko ball will be ejected. There is a problem that it will be done. For this reason, it was necessary to provide a stopper mechanism that prevents the sprocket from rotating when the power is turned off.

Therefore, an object of the present invention is to reduce the material cost of parts, to prevent damage to parts reliably, to improve the reliability of operation, and to eliminate the need for a stopper mechanism. It is to provide a pachinko ball ejecting device that achieves effects such as the above.

[0008]

[Means for Solving the Problems]

 The pachinko ball ejecting device of the present invention includes first and second ball receiving members which are rotatably provided and have a plurality of ball receiving concave portions for receiving the pachinko balls on the outer peripheral portion thereof, and the pachinko ball from the ball supply source. The first and second ball receiving members are provided substantially directly above the respective rotary shafts of the first and second ball receiving members, and the first and second ball receiving members are connected to each other. A drive shaft that rotates integrally with the rotational phase shifted is provided, and by rotating the drive shaft, one pachinko ball is alternately ejected from the first and second ball receiving members. And a worm gear mechanism provided between the drive shaft and the rotating shaft of the motor.

[0009]

[Action]

 According to the above-mentioned means, the pachinko balls from the ball supply source are supplied almost directly above the respective rotation shafts of the first and second ball receiving members, and the first and second ball receiving members are driven by the driving means. Since the pachinko balls are discharged to the ball discharge port side by rotating the ball, the pachinko balls come into contact with the upper surface of the ball receiving recess of each ball receiving member, and most of the load of the pachinko balls is It acts on the rotation axis of the ball receiving member. Therefore, the load acting on the tooth portion of each ball receiving member is reduced, so that the tooth portion of each ball receiving member can be reliably prevented from being chipped. Therefore, since it is not necessary to form each ball receiving member with a material having such high durability, the material cost can be reduced, and the tooth portion of the ball receiving member is not chipped, so that the operation reliability is improved.

Since the worm gear mechanism is provided between the drive shaft that integrally rotates the first and second ball receiving members with the rotational phases of the first and second ball receiving members shifted, and the rotary shaft of the motor, The large reduction ratio of the worm gear mechanism prevents the drive shaft, and thus the first and second ball receiving members, from rotating even when the motor is cut off due to power off. Further, since the driving torque of the motor required for rotationally driving the first and second ball receiving members is small, a small, low-torque motor can be used, and the manufacturing cost is correspondingly reduced.

[0011]

【Example】

 A first embodiment in which the present invention is applied to a prize ball discharging device will be described below with reference to FIGS. 1 to 9. First, in FIG. 2 showing the back side of the entire pachinko machine, a ball tank 3 which is a sphere supply source for storing a large number of prize balls, that is, pachinko balls 2, is arranged above the back side of the machine body 1. . The pachinko balls 2 are supplied into the ball tank 3 from a pachinko ball supply mechanism (not shown).

At the lower part of the ball tank 3, a ball flow-down passage 4 is arranged, and the pachinko balls 2 flowing out from the bottom of the ball tank 3 flow down in the ball flow-down passage 4. The inside of the ball flow-down passage 4 is configured so as to be divided into two branch passages 5 (only one of which is shown) in the front and rear by ribs. On the lower right side of these branch passages 5, a prize ball discharging device 6 is arranged. The pachinko balls 2 discharged from the prize ball discharging device 6 flow down in the ball flow-down passage 7 and are then stored in a ball tray (not shown) provided in the lower part on the front side of the machine body 1. Has been done.

Now, the prize ball discharging device 6 will be described with reference to FIGS. 1 and 3 to 7. In FIG. 3, first and second sphere supply paths 9 and 10 are provided in the case 8 so as to extend side by side in the vertical direction. As shown in FIGS. 5 and 6, the two sphere supply paths 9 and 10 are curved in an arc shape from the upper straight portions 9a and 10a to the right in FIGS. 5 and 6 from the upper straight portions 9a and 10a. The circular arc portions 9b and 10b are composed of lower linear portions 9c and 10c extending downward from the lower ends of the circular arc portions 9b and 10b.

In the first sphere supply passage 9, the upper end opening of the upper linear portion 9a communicates with one branch passage 5 of the sphere flow-down passage 4, and the lower end opening of the lower linear portion 9c is on the sphere outlet side. It communicates with a certain ball flow passage 7. Then, in the second sphere supply path 10, the upper end opening of the upper straight portion 10a communicates with the other branch passage 5 of the sphere flow-down passage 4, and the lower end opening of the lower linear portion 10c communicates with the sphere flow-down passage 7. is doing.

Further, on the inner peripheral side of the circular arc portion 9b of the first sphere supply path 9, the drive shaft 12, which is the first sprocket 11 which is the first sphere receiving member, is rotated. It is rotatably installed around the center. A plurality of, for example, six ball receiving recesses 11a are formed on the outer peripheral portion of the first sprocket 11, and tooth portions 11b are formed between the ball receiving recesses 11a. In this case, instead of forming the inner peripheral wall, the outer peripheral portion of the sprocket 11 is arranged at the arc portion 9b of the first sphere supply passage 9 in correspondence with the position of the inner peripheral wall. Then, the pachinko ball 2 is configured to be supplied almost directly above the drive shaft 12 of the first sprocket 11.

On the other hand, on the inner peripheral side of the circular arc portion 10b of the second ball supply path 10, for example, the second sprocket 13, which is a second ball receiving member, rotates the drive shaft 12 which is a rotating shaft. It is rotatably provided around the center of movement. A plurality of, for example, six ball receiving recesses 13a are formed on the outer peripheral portion of the second sprocket 13, and tooth portions 13b are formed between the respective ball receiving recesses 13a. In this case, instead of forming the inner peripheral wall, the outer peripheral portion of the second sprocket 13 is arranged in the arc portion 10b of the second sphere supply passage 10 in correspondence with the position of the inner peripheral wall. Then, the pachinko ball 2 is configured to be supplied almost directly above the drive shaft 12 of the second sprocket 13.

Further, as shown in FIG. 3, the drive shaft 12 is rotatably supported by the case 8, and the two sprockets 11 and 13 are attached to the drive shaft 12 by screwing. It is fixed. Here, the first and second sprockets 11 and 13 are fixed to the drive shaft 12 so as to rotate integrally with each other in a state in which the rotational phases of the first and second sprockets are deviated from each other by 30 degrees (see FIG. 1).

As shown in FIG. 1, the drive shaft 12 is configured to be integrally rotated in the clockwise direction in FIG. 1 by a stepping motor 16 via a worm gear mechanism 17, for example. The worm gear mechanism 17 includes a worm 19 attached to a rotary shaft 18 of the stepping motor 16 and a worm wheel 20 that meshes with the worm 19 (see also FIG. 4). As shown in FIG. 3, the worm wheel 20 is attached by screwing to the central portion of the drive shaft 12, that is, the portion between the sprocket 11 and the sprocket 13.

Here, for example, twelve pins 20a are provided on the peripheral portion of the left surface in FIG. 1 of the worm wheel 20, and these pins 20a are formed in a spiral groove on the outer peripheral portion of the worm 19. It is adapted to mesh with 19a. In this case, the worm 19 is set so that when the rotary shaft 18 of the stepping motor 16 makes one rotation, the worm wheel 20 makes 1/12 rotation, that is, 30 degrees. That is, the reduction ratio of the worm gear mechanism 17 is set to 1/12.

Further, as shown in FIG. 1, twelve iron pieces 21 for detecting the rotational position are attached to one side surface of the second sprocket 13. Then, for example, a reflection type optical sensor 22 (see FIG. 7) for detecting these iron pieces 21 is arranged near the side surface of the second sprocket 13. The reflection type optical sensor 22 is configured to detect the origin position of the second sprocket 13 and thus the first sprocket 11.

On the other hand, as shown in FIG. 3, a first upper sphere detection sensor 23 for detecting the presence or absence of the pachinko ball 2 is arranged on the outer peripheral wall of the upper linear portion 9 a of the first sphere supply path 9. ing. The first upper sphere detection sensor 23 is composed of a transmissive optical sensor and has a light projecting element 24 and a light receiving element 25. In this case, through holes are formed in the side wall of the first sphere supply path 9 so as to correspond to the respective elements 24 and 25, and the light projected from the light projecting element 24 passes through the through holes in the side wall. The light receiving element 25 receives light.

Then, on the outer peripheral wall of the lower linear portion 9c of the first sphere supply path 9, the first lower sphere detection for detecting and counting the pachinko balls 2 passing through the inside of the first sphere supply path 9 is detected. A sensor 26 is provided. The first lower sphere detection sensor 26 is composed of a transmissive optical sensor and has a light projecting element 27 and a light receiving element 28. Through holes are formed in the side walls of the first sphere supply path 9 in correspondence with the respective elements 27 and 28.

Similarly, a second upper sphere detection sensor 29 for detecting the presence or absence of the pachinko ball 2 is provided on the outer peripheral wall of the upper linear portion 10a of the second sphere supply path 10. The second upper sphere detection sensor 29 is composed of a transmissive optical sensor, and has a light projecting element 30 and a light receiving element 31. Through holes are formed in the side wall of the second sphere supply path 10 corresponding to the respective elements 30 and 31 described above.

Then, on the outer peripheral wall of the lower straight portion 10c of the second sphere supply path 10, the second lower sphere for detecting and counting the pachinko balls 2 passing through the second sphere supply path 10 is detected. A detection sensor 32 is provided. The second lower sphere detection sensor 32 is also composed of a transmissive optical sensor and has a light projecting element 33 and a light receiving element 34. Further, through holes are formed in the side wall of the second sphere supply path 10 corresponding to the respective elements 33 and 34.

In FIG. 7 showing the electrical configuration, the control circuit 35 is configured to include a microcomputer and has a function of controlling the overall operation of the pachinko machine and the operation of the prize ball discharging device 6. Have a control program. The control circuit 35 detects a prize from a prize detecting circuit 36 for detecting that the pachinko ball 2 has won a prize opening (not shown), a detection signal from the reflection type optical sensor 22, a first upper ball detecting sensor 2 3, the first lower sphere detection sensor 26, the second upper sphere detection sensor 29, and the second lower sphere detection sensor 32 are adapted to receive respective detection signals. Further, the control circuit 35 is configured to drive and control the stepping motor 16 by supplying a drive control signal to the drive circuit 37.

Next, the operation of the above configuration will be described with reference to FIGS. 8 and 9. When the pachinko ball 2 is not currently discharged by the prize ball discharging device 6, the first and second sprockets 11 and 13 are stopped at the positions shown in FIGS. The two pachinko balls 2 are stopped in a state of being stored in the two ball receiving recesses 11a and 13a of the sprockets 11 and 13, respectively. At this time, the pachinko balls 2 are stored in the upper straight portion 9a of the first sphere supply passage 9 and the upper straight portion 10a of the second sphere supply passage 10 without any gap.

In the above state, when the pachinko ball 2 hit into the game section (not shown) wins the prize, the prize ball ejecting device 6 ejects, for example, a total of 15 pachinko balls 2 as prize balls. Specifically, the stepping motor 16 is energized to drive the rotary shaft 18 or the worm 19 of the worm wheel 20 (drive shaft 12), that is, the first sprocket 11 and the second sprocket 11. The sprocket 13 is integrally rotated 1/12 rotations (30 degrees) 15 times, that is, 15/12 rotations, so that 15 pachinko balls 2 are moved one by one, and the first ball supply path 9 and the second ball supply path 10 are connected. It passes through the inside and is discharged to the ball downflow passage 7 side.

Specifically, when the first sprocket 11 and the second sprocket 13 are integrally rotated 1/12 (30 degrees) from the state shown in FIGS. 5 and 6, the states shown in FIGS. 8 and 9 are obtained. In the state shown, one pachinko ball 2 is ejected downward by the second sprocket 13. At this time, the pachinko ball 2 is not discharged from the first sprocket 11 side (see FIG. 8). Subsequently, when the first sprocket 11 and the second sprocket 13 are integrally rotated further 1/12, the state shown in FIGS. 5 and 6 is obtained, and the first sprocket 11 causes one pachinko ball 2 is discharged downward. At this time, the pachinko ball 2 is not discharged from the second sprocket 13 side (see FIG. 6).

Subsequently, the first sprocket 11 and the second sprocket 13 are integrally rotated by 1/12 rotation each, so that the pachinko ball 2 alternates from the first sprocket 11 and the second sprocket 13 by one revolution. It is discharged one by one. The state where the first and second sprockets 11 and 13 shown in FIGS. 5, 6, 8 and 9 are stopped is held by the large reduction ratio (1/12) of the worm gear mechanism 17. In this case, even when the rotation of the stepping motor 16 is stopped, the stepping motor 16 is energized so that the stepping motor 16 does not rotate due to the stop holding force for holding the rotation stop position. good.

When the stepping motor 16 is energized, the rotational position (that is, the origin) of the first sprocket 11 (and thus the second sprocket 13) is detected based on the detection signal from the reflective optical sensor 22. Control while detecting the position). At the same time, based on the respective detection signals from the first upper sphere detection sensor 23 and the second upper sphere detection sensor 29, the pachinko balls in the first sphere supply path 9 and the second sphere supply path 10 are detected. The control is performed while detecting whether or not there is 2. In addition, based on the detection signals from the first lower sphere detection sensor 26 and the second lower sphere detection sensor 32, the pachinko balls passing through the first sphere supply path 9 and the second sphere supply path 10 respectively. It is configured to control while counting the number of two.

According to the present embodiment having such a configuration, the pachinko balls 2 from the ball tank 3 are moved to the first and second sprockets 11 and 13 by the first and second ball supply paths 9 and 10. The drive shafts (rotating shafts) 12 are configured to be supplied almost directly above, and the stepping motor 16 causes the worm gear mechanism 17 and the drive shafts 12 to drive the first and second sprockets 11 and 13 to each other. The pachinko balls 2 are discharged one by one into the ball flow-down passage 7 by integrally driving the pachinko balls 2 with their rotational phases shifted by 30 degrees. Therefore, when the pachinko ball 2 is discharged, the load of the pachinko ball 2 acts on the drive shaft 12 via the sprockets 11 and 13, as shown in FIGS. 5 and 6.

Therefore, the load acting on the teeth 11b and 13b of each sprocket 11 and 13 is smaller than that of the conventional configuration, so that it is ensured that the teeth 11b and 13b of each sprocket 11 and 13 are chipped. It can be prevented. Further, since it is not necessary to form each sprocket 11 and 13 with a material having such high durability, the material cost can be reduced, and the tooth portions 11b and 13b of each sprocket 11 and 13 can be eliminated. The reliability of is greatly improved.

Further, in the above-described embodiment, the drive shaft 12 that integrally rotates the first and second sprockets 11 and 13 in a state where the rotation phases of the first and second sprockets are deviated, and the rotation shaft 18 of the stepping motor 16. Since the worm gear mechanism 17 is provided between the drive shaft 12 and the stepping motor 16 due to the large reduction ratio (1/12 in this case) of the worm gear mechanism 17 even when the power is turned off, the drive shaft 12 is disconnected. As a result, the first and second sprockets 11 and 13 are prevented from rotating.

Particularly, in this embodiment, since the pin 20a protruding from the worm wheel 20 is engaged with the groove 19a of the worm 19, the drive shaft 12 is rotated while the stepping motor 16 is de-energized. If it is attempted to do so, a very large driving force is required, so it is possible to reliably prevent rotation of the sprockets 11 and 13 due to the load of the pachinko ball 2. Therefore, although the stopper mechanism is not required, it is possible to prevent the pachinko ball 2 from being discharged when the pachinko hall is closed, that is, when the power is turned off.

Further, in the above-described embodiment, since the worm gear mechanism 17 has a large reduction ratio, the driving torque of the stepping motor 16 required for rotationally driving the first and second sprockets 11 and 13 is small, and the small size is achieved. A low torque stepping motor 16 can be used and the manufacturing cost is reduced. Further, the stepping motor 16 may be arranged at any position of 360 degrees on the outer peripheral side of the worm wheel 20, so that the degree of freedom of the arrangement position becomes high.

FIG. 10 shows a second embodiment of the present invention, and the different points from the first embodiment will be described. In FIG. 10, the first and second sphere supply paths 38 and 39 are arranged in the case 40 so as to be almost adjacent to each other, and the lower end sides of the sphere supply paths 38 and 39 communicate with each other to form a funnel-shaped common discharge path 41. It is supposed to be done. Then, the worm wheel 20 of the worm gear mechanism 17 is attached to the left end portion in FIG. 10 of the drive shaft 42 to which the first and second ball supply paths 38 and 39 are attached.

A common lower sphere detection sensor 43 that detects and counts the pachinko balls 2 passing through the common discharge passage 41 is provided on the outer peripheral wall of the lower end of the common discharge passage 41. The common lower sphere detection sensor 43 is composed of a transmission type optical sensor, and has a light projecting element 44 and a light receiving element 45. Through holes are formed in the side wall of the common discharge path 41 so as to correspond to the respective elements 44 and 45. The structure is almost the same as that of the first embodiment except for the structure described above.

Therefore, according to the second embodiment, it is possible to obtain substantially the same operational effects as the first embodiment, but in particular, the lower sphere detection sensor that counts the number of passing pachinko balls 2 is used. Since one common lower sphere detection sensor 43 is provided as described above, the number of sensors can be reduced as compared with the first embodiment in which the two lower sphere detection sensors 26 and 32 are provided. Manufacturing cost is reduced.

FIG. 11 shows a third embodiment of the present invention, and the different points from the first embodiment will be described. 11, a worm wheel 46 that replaces the worm wheel 20 is provided so as to rotate integrally with the drive shaft 12 and to be slightly movable in the left-right direction in FIG. A coil spring 48 is provided between the worm wheel 46 and the partition wall 47 of the case 8. The spring force of the coil spring 48 biases the worm wheel 46 leftward in FIG. As a result, the worm wheel 46 and the worm 19 are sufficiently meshed with each other. A washer 49 is interposed between the coil spring 48 and the partition wall 47. The structure is almost the same as that of the first embodiment except the structure described above.

Therefore, in the third embodiment as well, it is possible to obtain substantially the same operational effects as in the first embodiment, but in particular, the worm wheel 46 is sufficiently attached to the worm 19 by the spring force of the coil spring 48. Since the urging mechanism is configured to urge the worm gear to be engaged with the worm gear, the worm gear mechanism 50 can reliably operate without loosening. Further, although the coil spring 48 is used in the third embodiment, a configuration using, for example, a disc spring may be used instead of the coil spring 48.

In each of the above embodiments, 15 pachinko balls 2 are ejected at the time of winning, but the number of pachinko balls 2 to be ejected may be appropriately set to 8, 10, or the like. Further, in each of the above-mentioned embodiments, the stepping motor 16 is used as a motor for driving the first and second sprockets 11 and 13, but instead of this, a servo motor may be used, and the rotary shaft is rotated once per rotation. Any motor can be used as long as it can control rotation. Further, in each of the above-mentioned embodiments, the present invention is applied to the prize ball discharging device, but instead of this, it may be applied to a ball lending machine.

[0042]

[Effect of device]

 As is apparent from the above description, the present invention supplies the pachinko balls from almost right above the respective rotation shafts of the first and second ball receiving members, and also provides the first and second ball receiving members of both. Since the worm gear mechanism is provided between the drive shaft that rotates integrally with the rotation phase shifted and the rotation shaft of the motor that rotationally drives this drive shaft, the material cost of parts can be reduced. However, it is possible to reliably prevent damage to the components, improve the reliability of the operation, and to obtain an excellent effect such that the stopper mechanism is unnecessary.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing first and second sprockets and a worm gear mechanism according to a first embodiment of the present invention.

[Figure 2] Rear view of the pachinko machine

[Figure 3] Vertical side view of the prize ball discharging device

FIG. 4 is a cross-sectional view of the prize ball discharging device.

FIG. 5 is a vertical sectional front view of the first ball supply path side.

FIG. 6 is a vertical sectional front view of the second ball supply path side.

FIG. 7 is a block diagram.

FIG. 8 is a view corresponding to FIG. 5 showing different rotation states of the first sprocket.

FIG. 9 is a view corresponding to FIG. 6 showing a different rotation state of the second sprocket.

FIG. 10 is a view corresponding to FIG. 3 showing a second embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 3 showing a third embodiment of the present invention.

[Explanation of symbols]

1 is a machine body, 2 is a pachinko ball, 3 is a ball tank (ball supply source), 6 is a prize ball discharging device, 8 is a case, 9 is a first ball supply path, 10 is a second ball supply path, 11 Is a first sprocket (first ball receiving member), 11a is a ball receiving concave portion, 11b is a tooth portion, 12 is a drive shaft (rotating shaft), 13 is a second sprocket (second ball receiving member), Reference numeral 13a is a ball receiving concave portion, 13b is a tooth portion, 16 is a stepping motor, 17 is a worm gear mechanism, 18 is a rotary shaft, 19 is a worm, 20 is a worm wheel, 38 is a first ball supply path, and 39 is a second ball. Supply path, 40 is case, 41 is common discharge path, 42 is drive shaft,
43 is a common lower sphere detection sensor, 46 is a worm wheel, and 50 is a worm gear mechanism.

Claims (1)

[Scope of utility model registration request] 1. A first and second ball receiving member rotatably provided with a plurality of ball receiving concave portions for receiving a pachinko ball on an outer peripheral portion, and a pachinko ball from a ball supply source for the first and second ball receiving members. The first and second sphere supply paths, which are supplied from directly above the respective rotation shafts of the sphere reception member, and the first and second sphere reception members are integrally rotated with their rotational phases being shifted. A drive shaft and the first and second drive shafts that are driven to rotate.
Pachinko ball ejecting device comprising a motor for alternately ejecting one pachinko ball from the ball receiving member to the ball ejecting port side, and a worm gear mechanism provided between the drive shaft and the rotating shaft of the motor. .