JP2732724B2 - Gaming board for ball game machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game board used for a ball-and-ball game machine such as a pachinko machine, and more particularly to a game board based on a synthetic resin molded product.

[0002]

2. Description of the Related Art Conventionally, as a game board used for a pachinko machine or the like, a board made of a synthetic resin film having a pattern printed on a base of a wooden plywood is used. In such a game board, the side on which the decorative board is attached is a game surface, and a number of nails are driven into the game surface with its head protruding at a certain height.

However, it is difficult to equalize the driving conditions of the nails because the wooden base is made of a different material such as hardness depending on the location. In addition, when washing the game surface, there is a disadvantage that the wooden base may be deformed due to moisture infiltrating from the hole into which the nail is driven or humidity in the air or the decorative board may be peeled off. . Furthermore, in order to obtain an electric decoration effect with the gaming machine, since the base is made of wood and does not transmit light, a lamp or the like must be attached to a hole provided in advance, and the design of the gaming surface is restricted. It had been.

Therefore, in order to solve the inconvenience of the wooden base, it has been considered to form the base of the game board with a molded body made of a synthetic resin. The synthetic resin used for the base has relatively high hardness and is not easily damaged, does not show a large change in impact strength in a wide temperature range of -40 to 23 ° C., and has dimensional stability. Acrylonitrile / butadiene / styrene resin (ABS resin) is preferred because it has excellent insulation properties and is hardly affected by temperature and humidity, and has excellent moldability and colorability.
The base made of BS resin is generally manufactured by injection molding.

[0005]

However, when a nail is driven into a base made of a molded article made of synthetic resin, if the thickness of the molded article is not sufficient, a sufficient force for holding the nail is not obtained, and the nail is driven. There is a possibility that the nail becomes unstable or a crack is generated in the driving portion, and the strength of the base itself is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a game board made of a synthetic resin molded article that can easily and reliably drive a nail into a predetermined position and hold the driven nail with an appropriate force. And Another object of the present invention is to provide a game board suitable for mass production with a fixed arrangement of nails.

[0007]

The game board of the present invention is based on a molded body made of a synthetic resin, and has a boss having a hole into which a nail is driven from the playing surface side of the base, integrally formed on the back surface of the base. It is characterized by being formed in.

[0008] The boss is characterized in that it is formed in such a thickness that a nail driven with the head protruding at a predetermined height does not penetrate.

[0009] The hole is formed so as to be inclined at an angle of 3 to 5 ° obliquely downward from the gaming surface side.

The center of the hole is on the center axis of the circular cross section of the boss.

Further, the hole penetrates from the game side to the back side of the base.

In the game board of the present invention, an ABS resin is suitable as the synthetic resin forming the base.

[0013]

According to the gaming board of the present invention, the boss is provided on the back side of the portion where the nail is to be driven, and the boss has a hole for driving the nail, so that the nail can be easily driven. At the same time, the contact area between the nailed portion and the hole increases, and the nail inserted into the hole is held with an appropriate force. The boss is formed to a thickness that does not penetrate when the nail is driven with the head protruding at a predetermined height, so that the driven nail protrudes to the back side of the base and hinders wiring and the like. Nothing.

By forming the hole so as to face obliquely downward from the game surface, the nail inserted into the hole projects obliquely upward with respect to the game surface on the game surface side, and the game ball is inserted into the nail. It becomes easier to control the direction in which the game ball rebounds when hit.

Further, since the center of the hole is on the center axis of the circular cross section of the boss, the resin shrinks uniformly in each part of the boss, so that a boss having uniform strength can be obtained.

Furthermore, by forming the hole portion from the game surface side of the base to the back side, the inserted nail can be pushed out from the back side, so that it is easy to remove the bent or broken nail at the time of driving. become.

[0017]

FIG. 1 is a front view showing an example of a pachinko game machine using the game board of the present embodiment, FIG. 2 is a perspective view showing a game surface side of the game board of the present embodiment, and FIG. FIG. 4 is a perspective view showing the back side of the board, and FIG. 4 is an explanatory sectional view of cutting the boss in the vertical direction of the game board.

The pachinko gaming machine 1 shown in FIG. 1 is provided with a glass door (not shown) at an upper portion, and a substantially rectangular game board 2 is provided inside the glass door. The glass door is not opened and closed by a player, and the player cannot directly touch the game board 2.

At the center of the game board 2, a circular game surface 4 surrounded by a guide rail 3 is provided. When a player operates a hitting handle 5 provided on the lower right side of the front of the pachinko game machine 1, A game ball is fired from a launching device attached to the back side of the game board 2 and is hit on the game surface 4 along the guide rail 3. On the game surface 4, a large number of nails 6 are arranged as guide means for game balls that have been launched, while a plurality of variable winning devices are arranged. The variable prize device is a variable prize device that converts a game ball into a first state that is disadvantageous to the player and a second state that is advantageous to the player, and such a variable prize device is known. It is.

This pachinko gaming machine 1 is designed so that a game ball fired on the game surface 4 wins a start port so that another game can be played.
When a game ball enters, a predetermined number (for example, 13) of prize balls are paid out, and when a game ball enters, a predetermined number (for example, 7) of prize balls are paid out, and at the same time, a specific game start port is provided. A winning opening 8 is provided. General winning opening 7L,
7R, 7C are arranged on the left, right, and center of the game surface 4, and the special winning openings 8L, 8R are arranged on the left and right of the game surface 3.

A general winning opening 7L at the center of the game surface 3,
A variable display device 9 used for another game started when a game ball wins in the specific winning opening 8 is provided in a portion sandwiched between the 7R and the specific winning openings 8L and 8R. A variable winning device 10 having a door that opens when a result of a game has a specific display mode is provided.

As shown in FIG. 2, the game board 2 has an AB
It comprises a base 21 made of S-resin and a decorative plate 22 on which a pattern is printed and adhered to the surface of the base. On the surface of the decorative board 22, a frame 23 forming a game surface and a guide rail 3 for guiding game balls are provided, and a game surface 4 is formed at the center. On the game surface 4, a large number of nails 6 are arranged by being driven from above the decorative board 22 as guide means for the game balls that have been launched.

The game board 2 is provided with openings 24, 25, 26, and 27 for mounting a general winning opening 7, a specific winning opening 8, a variable display device 9, and a variable winning device 10 in advance. .

As shown in FIG. 3, an ABS resin base 21 is provided.
Is formed in a box shape around which a frame 31 is formed. Inside the box shape, a number of bosses 32 having a circular cross section having a hole into which the nail 6 is driven are formed integrally with the base 21. It is provided. In the center of the box, a circular game surface 4 whose center is formed on the surface on the opposite side of the base 21.
Annular reinforcing ribs 33a and 33b are formed integrally with the base 21 so as to coincide with the center of
Reinforcing ribs 34 are formed integrally with the base 21 at places where reinforcement is preferable, such as around 4, 25, 26, and 27.

As shown in FIG. 4, the boss 32 has a hole 41 into which the nail 6 is driven, and the hole 41 penetrates through the base 21 and the boss 32. The boss 32 is formed to a thickness such that the nail 6 indicated by a virtual line does not penetrate to the back side. At this time, the nail 6 is driven into the hole 41 with its head protruding to a predetermined height from above the decorative plate 22 attached to the game surface side of the base 21.

The hole 41 is formed obliquely downward from the gaming surface side so that the angle θ between the center axis of the hole 41 and the normal to the gaming surface is 3 to 5 °. ing.

The diameter of the hole 41 is slightly narrower than the nail 6 is driven, the diameter r ₁ of the opening of the gaming surface
It is formed in a conical shape with a diameter r _{2 of} 1.8 mm and a rear opening of 1.75 mm. And the center G of the volume of the hole 41 is
The boss 32 is located on the center axis of the circular cross section.

Since the base 21 is formed of an ABS resin molded body, if the boss 32 is formed to the above-mentioned thickness, the boss 32 will have a considerable strength. However, the provision of the hole 41 allows the nail 6 to be easily driven. Will be able to Base 21
Unlike a wooden base, the strength of each part is uniform. By providing a boss 32 having the hole 41 at a position where the nail 6 is driven, a large number of nails 6 can be driven with a uniform force. Accordingly, the nail 6 may be driven in accordance with the position of the boss 32, and the disadvantage that the skilled worker tends to arbitrarily determine the arrangement of the nail 6 as in the related art is eliminated. Game boards in which the nails 6 of the same type are arranged in the same manner can be mass-produced.

Since the boss 32 is formed to the above thickness, when the nail 6 is driven into the hole 41 with its head protruding at a predetermined height, the tip of the nail 6 may penetrate to the back side. Therefore, the tip of the nail 6 does not interfere with wiring or the like.

The hole 41 penetrates through the base 21 and the boss 32 and the opening is formed in the above-mentioned diameter, so that a sufficient contact surface is formed between the hole 41 and the nail 6 that has been driven. , The nail 6 can be securely held. Since the nail 6 is provided for guiding the game ball as described above, a nail at a position where the game ball hits frequently, for example, a so-called top nail located at the top of the game surface, It is desirable that the nail is held stronger than the nail in the position. In such a case, the force holding the nail 6 may be adjusted by adjusting the diameter of the hole 41.

The hole 41 is formed so as to be inclined obliquely downward from the game surface at the above angle, so that the driven nail 6 is held with its head projecting obliquely upward from the game surface. Thus, the direction in which the game ball rebounds when the game ball hits can be easily controlled.

Further, since the hole 41 is formed through the base 21 and the boss 32, the nail 6 bent or broken at the time of driving can be pushed out from the back side and pulled out.

Since the hole 41 is formed such that the center G of the volume is located on the center axis of the circular cross section of the boss 32, the resin uniformly shrinks at each part of the boss 32 during injection molding. A boss 32 having uniform strength at each part is obtained.

The hole 41 may be cylindrical, but by making it conical as described above, the mold can be easily removed during injection molding.

In this embodiment, the hole 41 is formed so as to penetrate the base 21 and the boss 32. However, the hole 41 only needs to have a depth capable of securely holding the nail 6 that has been driven. The opening on the back side may not be provided.

[0036]

As described above, according to the present invention, a boss having a hole is provided on the back side of a position where a nail is driven. The nail can be easily driven and the driven nail can be securely held.

Since the base of the game board of the present invention is made of synthetic resin, a large number of bases having bosses formed at predetermined positions can be manufactured, and a large number of nails are driven with a uniform force in accordance with the positions of the bosses. As a result, game boards having the same nail arrangement can be mass-produced.

The boss is formed to a thickness that does not penetrate when the nail is driven with the head protruding at a predetermined height, so that the driven nail penetrates the back side of the base. Can be prevented.

Since the hole is formed so as to face obliquely downward from the game surface, the nail driven into the game surface projects obliquely upward with respect to the game surface on the game surface side, and when the game ball hits the nail. The direction in which the game ball rebounds can be easily controlled.

Further, since the hole is formed such that the center of its volume is located on the center axis of the circular cross section of the boss, the resin uniformly shrinks at each portion of the boss during injection molding. A boss having uniform strength in each part can be obtained.

Further, since the hole is formed so as to penetrate from the game surface side to the back side of the base, it is possible to push out a bent or broken nail from the back side at the time of driving and to easily remove it.

[Brief description of the drawings]

FIG. 1 is a front view of a pachinko game machine using a game board according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a game surface side of a game board according to one embodiment of the present invention.

FIG. 3 is a perspective view showing the back side of the gaming board of FIG. 2;

FIG. 4 is an explanatory sectional view of cutting a boss in a vertical direction of the game board.

[Explanation of symbols]

1 ... Pachinko machine, 2 ... Game board, 3 ... Guide rail,
4 ... game surface, 5 ... hitting handle, 6 ... nail, 7L, 7R,
7C: General winning opening, 8L, 8R: Specific winning opening, 9: Variable display device, 10: Variable winning device, 21: Base, 22: Decorative plate, 23: Frame, 24, 25, 26, 27 ... Opening ,
31: frame, 32: boss, 33a, 33b: annular reinforcing rib, 34: reinforcing rib, 41: hole.

Claims (5)

(57) [Claims] 1. A ball-and-ball game wherein a base body is formed of a synthetic resin and a boss having a hole into which a nail is driven from the game surface side of the base is integrally formed on the back surface of the base. Game board for machine. 2. The ball game machine according to claim 1, wherein said boss is formed to a thickness such that a nail driven with a head protruding at a predetermined height does not penetrate. Game board. 3. The game board for a ball game machine according to claim 1, wherein said hole is formed obliquely downward from said game surface side. 4. The game board for a ball game machine according to claim 1, wherein the center of said hole is on the center axis of the circular cross section of said boss. 5. The game board for a ball game machine according to claim 1, wherein the hole penetrates from the game surface side to the back side of the base.