JP2002045539A - Pinball game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce countermeasures against noise by breaking electromagnetic noise being generated by electrostatic discharge due to static electricity that is electrified to a game ball and a ball tank, and to prevent a malinfluence due to noise on various kinds of substrates for control, or the like, that control a game. SOLUTION: A plated layer 50 is formed on the inner surface of the ball tank 33, the plated layer 51 is formed also on the outer surface. Therefore, when a ball tank 33 is made of an insulating material such as a synthetic resin, a game ball 25 to be supplied from the outside to the ball tank 33 due to fall is electrified by static electricity, the radiation especially to the lower portion of the ball tank 33 of the electromagnetic noise can be effectively broken even if electromagnetic wave-like noise due to the electrified static electricity is generated, thus reliably preventing poor influence due to noise to a plurality of substrates for control being provided at the lower side of the ball tank 33 and reinforcing measures against noise.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball game machine, and more particularly, to a game machine in which electromagnetic wave noise generated by electrostatic discharge due to static electricity charged in a game ball in a ball tank is cut off, and noise countermeasures are strengthened. .

[0002]

2. Description of the Related Art Conventionally, in a ball-and-ball game machine such as a pachinko machine, a back mechanism plate is detachably mounted on the back side of a front frame.
A ball tank and a tank rail extending therefrom are provided above the back mechanism plate, and game balls conveyed from game ball conveyance paths provided for each island structure of the pachinko hall are supplied to the ball tank. . A payout device for paying out game balls is provided on a side portion of the back mechanism plate, and a payout ball guiding passage connected to the payout device is provided below the back mechanism plate.
Therefore, when the game ball wins the winning means, the payout device is driven, a predetermined number of game balls are paid out as a prize ball,
These paid out game balls are paid out from the upper plate discharge port to the ball tray via the payout ball passage.

[0003] In addition, out balls and winning balls used for ball games are collected at the hole side through a game ball collection path, polished by a polishing device, and then returned to a ball tank via a game ball conveyance path. It is being supplied. By the way, since the game ball transport path, the ball tank, and the payout ball passage connected to the ball tank are made of an insulator made of synthetic resin, static electricity generated when the game ball is polished by the polishing device is charged to the game ball. In the course of being transported along the game ball transport path on the hall side, static electricity is generated when the game ball frictionally contacts or collides with the transport path or the game ball, and the game ball is charged (so-called contact (Charge).

[0004] Furthermore, when the ball is supplied from the game ball conveyance path into the ball tank by dropping, static electricity is also generated when the ball collides with a plurality of game balls in the ball tank, and this static electricity can be charged to the game ball. High in nature. This means that some of the static electricity generated in the game ball is transferred to the insulator passage when the game ball is made of metal, but moves along the passage of the insulator made of synthetic resin while colliding with the passage or the game ball. Although the static electricity is also charged in the path of the insulator, the game ball supplied to and stored in the ball tank tends to be charged with static electricity.

As described above, when a game ball charged with static electricity is supplied to the ball tank by dropping or moves in the ball tank, the game ball collides with the game ball or the ball tank or separates from the ball. And a concentrated discharge in the air. As a result, an electromagnetic noise is generated due to the generation of the magnetic field, which adversely affects control signals of various control units that control game control, and the control units may stop operating or malfunction. Therefore, conventionally, a metal plate is provided in a part of a payout ball passage where a game ball such as a ball tank, a tank rail or the like collides during movement and static electricity is likely to be generated, so that the metal ball can be brought into contact with the game ball, and the inner frame is formed outside. A hinge fitting rotatably connected to the frame and its metal plate are connected by a ground line, so that static electricity charged on the game ball is grounded to the hinge fitting.

[0006]

As described above, a metal plate is provided in a part of a payout ball passage through which a game ball is easily contacted during movement, and static electricity charged on the game ball is discharged from the metal plate or the ground line. At this time, the hinge fittings of the inner frame are grounded to escape, but the hinge fittings are small and not a full-scale grounding plate, so that at present, a sufficient grounding effect is not obtained. Therefore, the electromagnetic noise generated by the electrostatic discharge of the moving game ball has an adverse effect on various control boards and the like that control the game control, which causes a problem that the game control is hindered. I have.

[0007] Further, electromagnetic noise due to static electricity charged in the ball tank and the path of the insulator also has an adverse effect on game control. An object of the present invention is to cut off electromagnetic noise generated by electrostatic discharge due to static electricity charged in a game ball and a ball tank so that noise countermeasures can be strengthened, and to various control boards and the like for controlling game control. To prevent adverse effects due to noise.

[0008]

According to a first aspect of the present invention, there is provided a ball game machine comprising: a plurality of control boards each formed on an independent board in accordance with control contents of game control; and a game ball supplied from outside. In a ball game machine having a ball tank for temporarily storing and a tank rail for guiding a game ball supplied from the ball tank to a payout device, an electrostatic discharge of static electricity charged on the game ball of the ball tank A conductive member is provided at a predetermined position of the ball tank so as to block generated electromagnetic wave noise.

[0009] The plurality of control boards are configured as independent boards, and game control is executed by these control boards. Game balls supplied from the outside are supplied to the ball tank by dropping and temporarily stored therein, and the game balls in the ball tank are guided to the payout device via the tank rail. By the way, since this ball tank is an insulating member such as a synthetic resin, when a game ball is supplied to the ball tank from the outside by dropping, the game ball collides with the ball tank or the game ball, generating static electricity, The static electricity may charge the game ball or the ball tank (so-called contact charging).

When a game ball collides with or separates from a game ball or a ball tank, a point-concentrated discharge occurs with the game ball, or an electrostatic discharge occurs in the air. Noise occurs. However, since a conductive member is provided at a predetermined portion of the ball tank, electromagnetic noise due to static electricity charged on the game ball in the ball tank can be reliably shut off by the conductive member, and a plurality of control members are provided. Noise measures for the substrate can be strengthened.

Here, when the predetermined portion is at least one of the inner surface and the outer surface of the ball tank (claim 2),
Since at least one of the inner surface and the outer surface of the ball tank is formed of a conductive member, the conductive member can effectively block radiation of electromagnetic wave noise due to static electricity charged on the game ball in the ball tank. Therefore, noise measures for a plurality of control boards can be strengthened.

When the predetermined portion is at least one of the inner surface and the outer surface of the bottom wall of the ball tank (claim 3), at least one of the inner surface and the outer surface of the bottom wall of the ball tank is a conductive member. With this configuration, the conductive member can effectively block radiation of electromagnetic wave noise due to static electricity charged in the game ball in the ball tank, particularly, downward radiation of the ball tank. Therefore, it is possible to enhance measures against noise for a plurality of control boards provided below the ball tank.

Further, when the conductive member is provided along the inner surface of the ball tank (claim 4), noise measures are strengthened only by providing the conductive member along the inner surface of the ball tank. can do. In the case where the conductive member is provided along the inner surface of the bottom wall of the ball tank (claim 5), the noise can be obtained simply by providing the conductive member along the inner surface of the bottom wall of the ball tank. Measures can be strengthened.

Further, when the conductive member is made of a conductive film (claim 6), the conductive film can be easily formed, and furthermore, electromagnetic wave noise is generated due to static electricity charged on the game ball in the ball tank. Even in this case, the electromagnetic noise can be effectively absorbed and blocked by the conductive coating.

In the case where the conductive member is made of a thin metal plate (claim 7), the thin metal plate can enhance the sealing performance against the generated electromagnetic wave noise. Even when electromagnetic noise is generated due to static electricity charged on the game ball, the electromagnetic noise can be effectively absorbed by the metal plate and cut off.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. The present embodiment is an example in which the present invention is applied to a first-class pachinko machine called a card-type ball game machine installed in an island structure of a pachinko hall, and an island structure provided in a pachinko hall. , A plurality of card-type ball lending machines 1 and a plurality of pachinko machines 2 are alternately arranged in the length direction, and the card-type ball lending machine 1 is electrically connected to the pachinko machine 2.

As shown in FIGS. 1 to 4, a pachinko machine 2 which is a card-type ball game machine has a rectangular frame-shaped outer frame 3 and a front frame 4 pivotally attached to the outer frame 3 so as to be openable and closable. The outer frame 3 is detachably attached to an island structure (not shown) in a state where the card-type ball lending machine 1 is sandwiched in a sandwich shape.
A game board 5 is detachably attached to the front frame 4 from the back side,
A glass door 6 having a window 6a and a front plate (not shown) of a ball tray 8 are pivotally connected to the front side of the game board 5 so as to be openable and closable, respectively. A game ball 25 for firing is provided on its front panel.
Is mounted on the ball receiving tray 8 for storing
A lower plate 9 for storing game balls 25 overflowing or withdrawn from the ball tray 8 and a firing handle 11 of a firing means 10 are provided.

The firing means 10 includes a firing handle 11 which can be rotated and a firing motor (not shown) for firing a game ball 25 with a hitting hammer 12 with a hitting force corresponding to the turning angle of the firing handle 11. Have. An operation panel 14 for lending the ball to the card-type ball lending machine 1 is provided on the right side of the ball tray 8, and the operation panel 14 has a remaining card display section 14a for displaying the remaining card with three digits.
And a ball lending switch 14b for instructing a ball lending of a predetermined amount of game balls 25, and a return switch 14c for instructing a card return at the end of the game.

As shown in FIG. 2, the game board 5 is provided with a substantially annular guide rail 15 composed of a metal outer rail and an inner rail, and a game area 5a inside the guide rail 15 has Color liquid crystal display 16, symbol starting means (symbol starting and winning means) 17, opening and closing winning means (large winning means) 18, a plurality of normal winning means 19 (in this case, in addition to the normal winning means 19 in the upper stage, opening and closing type Winning Means 1
For example, on the left and right sides of 8, for example, six ordinary winning means 19),
Two gates 20 (passing ports) and the like are respectively provided at predetermined positions.

The liquid crystal display 16 functions as a symbol display means 22 for displaying a variable symbol and displaying a background image, moving images of various characters, and the like. The symbol display means 22 displays the background image and the character in an animated manner and, for example, three (left, middle,
On the condition that the game ball 25 wins the symbol starting means 17, the display symbols of the symbol display portions 22 a to 22 c are displayed in a variable manner (scroll display) for a predetermined time on condition that the game ball 25 wins. Then, the game is stopped in the stop symbol pattern determined based on the lottery result according to the winning timing of the game ball 25 to the symbol starting means 17.

Immediately above the liquid crystal display 16, ordinary winning means 19 and second symbol display means 23 are provided. The second symbol display means 23 has a normal symbol display unit for displaying one ordinary symbol, and the game ball 2 passing through the gate 20.
When 5 is detected, the display symbol of the normal symbol display section fluctuates for a predetermined time, and displays the stop symbol determined by the lottery value selected at the time when the game ball 25 passes through the gate 20 to stop. Has become. Symbol starting means 17
Is a motorized tulip having a pair of left and right openable pawls 17a that can be opened and closed. When the stop symbol after the change of the second symbol display means 23 hits and the symbol is displayed, the open / close nail 17a is opened.
Is released only for a predetermined time, making it easier to win a prize.

The open / close prize means 18 has an open / close plate 18a which can be opened forward, and when the stop symbol after the change of the symbol display means 22 is a hit symbol such as "777", a special game called "big hit" is played. Starting, the opening / closing plate 18a is opened forward. There is a specific area 18b inside the open / close type winning means 18, and when a winning ball passes through the specific area 18b, the special game is continued.

After the opening / closing plate 18a of the opening / closing type winning means 18 is opened, a predetermined time has elapsed or a predetermined number (for example, 1)
(0) when the game ball 25 wins and the opening / closing plate 18a closes, the special game ends when the game ball 25 does not pass through the specific area 18b. The special game is continued up to a predetermined number of times (for example, 16 times), and the state is controlled to be advantageous to the player.

As shown in FIGS. 3 and 4, on the back side of the front frame 4, a back mechanism plate 30 for holding the game board 5 from the back side is detachably mounted. The back mechanism plate 30 has an opening 30a. A ball tank 33 and a tank rail 34 extending therefrom are provided on the upper side thereof, and a dispensing device 35 connected to the tank rail 34 is provided on a side portion of the back mechanism plate 30. On the side, a passage unit 36 connected to the payout device 35 is provided. Dispensing device 3
The game balls 25 paid out from 5 are paid out to the ball tray 8 via a winning ball payout passage (not shown) of the passage unit 36.

Here, the ball tank 33 and the ball tank 3
The tank rails 34 and the like for guiding the game balls 25 supplied from 3 to the payout device 35 are each made of synthetic resin (insulator). Therefore, when the game ball 25 is in frictional contact or collision with the ball tank 33, the tank rail 34 and the game ball 25 while the game ball 25 is moving on the ball tank 33 or the tank rail 34, static electricity is generated. The generated static electricity is generated by the game ball 25.
In addition, in many cases, the ball tank 33 is also charged.

At the opening 30a of the back mechanism plate 30, a back cover 37 mounted on the back side of the game board 5, and prize means 17 to
A prize ball discharge gutter (not shown) for discharging the game ball 25 which has won the prize 19 is respectively fitted. A main control board 39 is provided inside a case 38 mounted on the back cover 37, and a symbol control board 40 is provided in front of the main control board 39. Below the main control board 39, a lamp control board 42 is provided inside a case 41a attached to the back cover 37, and a sound control board 43 is provided inside a case 41b adjacent to the case 41a.

A power supply board 45 and a payout control board 46 are provided inside the case 44 mounted on the back mechanism plate 30 below the cases 41a and 41b. Further, a firing control board 48 is provided inside a case 47 mounted on the rear side of the firing means 10. The control boards 39 to 40, 42 to 43, 45 to 46, 48 are each composed of an independent printed board, and the control boards 39, 40, 42,
43 and 46 each include a CPU, a ROM, a RAM, and the like.
Microcomputers (not shown) each comprising a chip integrated circuit are provided.

The main control board 39 and other control boards 40,
42, 43, and 46 are electrically connected to each other through connectors by a plurality of signal lines, and are used to cause the control boards 40, 42, 43, and 46 to execute predetermined game operations from the main control board 39. Control commands can be transmitted by one-way communication. By adopting one-way communication of control commands,
It is possible to reliably prevent improper operation related to symbol stoppage, significantly reduce the control load on the main control means, and simplify transmission control.

A main control means is formed on the main control board 39 and controls so-called game control of the game board 5 relating to input / output of signals to various game parts and game ball detection switches provided on the game board 5. Mainly governs. A symbol control means is formed on the symbol control board 40, and the liquid crystal display 16 is controlled based on a symbol control command transmitted from the main control means.
Or display control for displaying various moving images and background images, and variably controlling the symbols of the symbol display portions 22a to 22c,
The fluctuation is stopped and controlled by the specified stop symbol.

A lamp control means is formed on the lamp control board 42 and controls the lighting of a lamp group including a large number of display lamps provided on the game board 5 and the like. Sound control board 4
A sound control means 3 is provided on 3 and controls sound output for various kinds of sound effects to speakers. A launch control means is formed on the launch control board 48, and controls the launch control of the game balls 25 by driving the launch motor.

Next, the ball tank 33 will be described. As shown in FIGS. 5 and 6, the ball tank 33 is a box made of synthetic resin having an open top, and the left end of the bottom wall 33 a is provided with the stored game balls 25 on the lower tank rail 34.
A discharge port 33b having a substantially rectangular shape in plan view and supplied by dropping is formed. A copper plating layer 50 is formed on the inner surface of the ball tank 33, and a copper plating layer 51 is also formed on the outer surface thereof. In this case, since the ball tank 33 is made of synthetic resin, the inner and outer surfaces of the ball tank 33
First, a conductive film is formed, and thereafter plating is performed to form plating layers 50 and 51, respectively.

Here, these plating layers 50 and 51 correspond to the conductive film formed on the surface. Also, the plating layer 5
Reference numerals 0 and 51 may be conductive plating layers of an aluminum alloy, a copper alloy, or the like. Next, the game balls 2 stored in the ball tank 33
The operation of blocking (shielding) electromagnetic noise due to static electricity charged in the ball 5 and the ball tank 33 will be described.

The game balls 25 polished by the hole-side polishing device (not shown) are supplied to the ball tank 33 by dropping through a game ball transport path (not shown) which is an insulator. The plurality of stored game balls 25 include static electricity generated when the ball is polished with a cloth or the like by a polishing device, static electricity generated by collision or friction between the game balls 25 during conveyance on the game ball conveyance path. Further, when supplied from the game ball conveyance path into the ball tank 33 by dropping, the static electricity generated when the ball collides with the plurality of game balls 25 in the ball tank 33 is charged (so-called contact charging). There is a high possibility that the static electricity may also be charged to the ball tank 33.

In this case, when the game ball 25 is made of metal, it moves along the game ball transfer path, which is an insulator made of synthetic resin, while colliding or frictional with each other. Some of the static electricity charged on the game ball 25 is transferred to the game ball transport path, and the static electricity is also charged on the game ball transport path, but the game ball 2 supplied to the ball tank 33 and stored therein.
5 may be charged with static electricity. Moreover, when the game ball 25 of the ball tank 33 is supplied to the tank rail 34 through the narrow discharge port 33b by dropping, the game ball 25
Comrades rub or collide with each other, which also generates static electricity on the game ball 25, and the generated static electricity often charges the game ball 25 in a large amount.

In the state where the game ball 25 is charged with a large amount of static electricity in this way, when the game ball 25 collides with the game ball 25 or the ball tank 33 or moves toward the discharge port 33b while separating, the approaching game ball 25 Point discharge or electrostatic discharge occurs in the air. As a result, electromagnetic noise is generated due to the generation of the magnetic field. Furthermore, the ball tank 33
In some cases, noise may be generated due to the static electricity charged on the substrate.

However, the plating layer 50 is formed on the inner surface of the ball tank 33, and the plating layer 51 is formed on the outer surface thereof.
Is formed, the electromagnetic noise generated by the static electricity generated by the game ball 25 and the ball tank 33 can be reliably shielded (shielded) by the double plating layers 50 and 51, and in particular, the electromagnetic noise generated under the ball tank 33 can be prevented. The radiation of electromagnetic wave noise can be suppressed. Therefore, it is possible to reliably prevent the plurality of control substrates 39, 40, 42, 43, and 46 disposed below the ball tank 33 from being adversely affected by noise.

As described above, since the plating layer 50 is formed on the inner surface of the ball tank 33 and the plating layer 51 is also formed on the outer surface, the ball tank 33 is an insulating member such as a synthetic resin.
Game ball 2 supplied from the outside to the ball tank 33 by dropping
In the case where the static electricity is charged in the antenna 5, even when electromagnetic noise is generated by the charged static electricity, the radiation of the electromagnetic noise, particularly downward to the ball tank 33, can be effectively blocked. Therefore, a plurality of control boards 39, 40, 42, 4 disposed below the ball tank 33 are provided.
As a result, it is possible to reliably prevent the adverse effects of the noise on 3, 46, and to enhance measures against noise.

A description will be given of a modified embodiment in which the above embodiment is partially modified. 1) A thin metal coating film may be formed on the inner surface or outer surface of the ball tank 33 by vapor deposition by evaporating copper or aluminum metal. 2] As shown in FIG. 7, a conductive member 55 made of a thin copper plate may be detachably attached to the inner surface of the ball tank 33A. Also in this case, similarly to the above-described embodiment, noise due to electromagnetic waves generated by static electricity charged on the game balls 25 can be reliably blocked (shielded) by the conductive member 55.

3) As shown in FIG. 8, a conductive member 56 made of a thin copper plate may be adhered to the detachable painting material on the outer surface of the ball tank 33B. Also in this case, similarly to the above-described embodiment, noise caused by electromagnetic waves generated by static electricity charged in the game ball 25 and the ball tank 33B can be reliably blocked (shielded) by the conductive member 55. 4] Since the control boards 39, 40, 42, 43, 46 are provided below the ball tanks 33, 33A, 33B,
The thickness of the bottom portions of the plating layers 50 and 51 and the conductive members 55 and 56 may be particularly increased. 5] A plated layer may be formed or a conductive member may be provided only on the bottom wall 33a of the ball tanks 33, 33A, 33B.

6] An antistatic agent may be sprayed on the surfaces of the ball tanks 33, 33A, 33B, or a thin conductive sheet made of conductive rubber or resin mixed with metal pieces may be adhered. 7] The ball tanks 33, 33A and 33B may be made of conductive resin such as conductive rubber and resin mixed with metal pieces. 8] The present invention is not limited to the above-described embodiments and modifications, and various modifications may be made without departing from the spirit of the present invention. The present invention can be applied to various ball and ball game machines such as ball machines.

[0041]

According to the first aspect of the present invention, a plurality of control substrates, a ball tank, and a tank rail are provided, and a conductive member is provided at a predetermined portion of the ball tank. Even if electromagnetic noise is generated due to electrostatic discharge of static electricity charged on the game ball in the ball tank, it is an insulating member, and the electromagnetic noise can be reliably shut off by the conductive member, thereby enabling game control. It is possible to reliably prevent the adverse effects of the noise on the control signals and the like of the plurality of control boards to be controlled. Therefore, noise measures for a plurality of control boards can be strengthened.

According to the second aspect of the present invention, since the predetermined portion is at least one of the inner surface and the outer surface of the ball tank, at least one of the inner surface and the outer surface of the ball tank is formed of a conductive member. The radiation of electromagnetic noise due to static electricity charged on the game ball in the ball tank can be effectively blocked by the conductive member. Therefore, noise measures for a plurality of control boards can be strengthened. The other effects are the same as those of the first aspect.

According to the third aspect of the present invention, since the predetermined portion is at least one of the inner surface and the outer surface of the bottom wall of the ball tank, at least one of the inner surface and the outer surface of the bottom wall of the ball tank is a conductive member. With this configuration, the conductive member can effectively block radiation of electromagnetic wave noise due to static electricity charged in the game ball in the ball tank, particularly, downward radiation of the ball tank. Therefore, it is possible to enhance measures against noise for a plurality of control boards provided below the ball tank. Other effects are the same as those of the second aspect.

According to the fourth aspect of the present invention, since the conductive member is provided along the inner surface of the ball tank, noise measures are reinforced only by providing the conductive member along the inner surface of the ball tank. can do. Other effects similar to those of any one of the first to third aspects are exhibited. According to the fifth aspect of the present invention, since the conductive member is provided along the inner surface of the bottom wall of the ball tank, noise can be obtained simply by providing the conductive member along the inner surface of the bottom wall of the ball tank. Measures can be strengthened. Other effects similar to those of any one of the first to third aspects are exhibited.

According to the sixth aspect of the present invention, since the conductive member is made of a conductive film, the conductive film can be easily formed.
Moreover, even if electromagnetic noise is generated by static electricity charged on the game ball in the ball tank, the electromagnetic noise can be effectively absorbed by the conductive coating and cut off. In addition, the same effect as any one of the first to fifth aspects is obtained.

According to the seventh aspect of the present invention, since the conductive member is formed of a thin metal plate, the thin metal plate can enhance the sealing performance against generated electromagnetic wave noise, and furthermore, the inside of the spherical tank can be improved. Even when electromagnetic noise is generated due to static electricity charged on the game ball, the electromagnetic noise can be effectively absorbed by the metal plate and cut off. In addition, the same effect as any one of the first to fifth aspects is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pachinko machine (ball game machine) according to an embodiment of the present invention.

FIG. 2 is a front view of a game board of the pachinko machine.

FIG. 3 is a rear view of the pachinko machine.

FIG. 4 is a side view of the pachinko machine.

FIG. 5 is a perspective view of a ball tank.

FIG. 6 is a vertical sectional side view taken along line FF of FIG. 5;

FIG. 7 is a perspective view of a ball tank and a conductive member provided on the inner surface thereof.

FIG. 8 is a perspective view of a ball tank and a conductive member provided on the outer surface thereof.

[Explanation of symbols]

 2 Pachinko machine (ball game machine) 25 Game ball 33 Ball tank 34 Tank rail 35 Payout device 39 Main control board 40 Symbol control board 42 Lamp control board 43 Sound control board 46 Payout control board 50 Plating layer (conductive member) 51 Plating layer (conductive member) 55 conductive member 56 conductive member

Claims (7)

[Claims] A plurality of control boards (39, 40, 42, 43, 46) each formed on an independent board according to the control content of game control.
And a ball tank (33, 33A, 33B) for temporarily storing a game ball (25) supplied from the outside, and a game ball (25) supplied from the ball tank (33, 33A, 33B). In a ball game machine having a tank rail (34) for guiding to a device (35), an electromagnetic wave generated by electrostatic discharge of static electricity charged in a game ball (25) of the ball tank (33, 33A, 33B). A ball game machine characterized in that conductive members (50, 51, 55, 56) are provided at predetermined positions of the ball tanks (33, 33A, 33B) so as to block noise. 2. The method according to claim 1, wherein the predetermined portion is a ball tank (33, 33A, 33B).
The ball game machine according to claim 1, wherein the ball game machine is at least one of an inner surface and an outer surface. 3. The predetermined part is a ball tank (33, 33A, 33B).
The ball game machine according to claim 2, wherein the bottom wall (33a) has at least one of an inner surface and an outer surface. 4. The elastic member according to claim 1, wherein said conductive member (50, 51, 55, 56) is provided along an inner surface of the ball tank (33). Ball game machine. 5. The method according to claim 1, wherein said conductive member is provided along an inner surface of a bottom wall of the ball tank. The ball game machine according to any one of the above. 6. A ball game machine according to claim 1, wherein said conductive member (50, 51) is made of a conductive film. 7. The ball game machine according to claim 1, wherein said conductive member (55, 56) is made of a thin metal plate and is detachably provided. .