JP2826401B2 - 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 is deformed or the decorative board is peeled off due to the moisture permeating from the hole into which the nail is driven or the humidity in the air. Furthermore, in order to obtain an electric decoration effect with a gaming machine, since the base is wooden and does not transmit light, it is necessary to mount a lamp or the like in a hole provided in advance, and the design of the gaming surface is restricted. .

[0004] 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 this substrate has relatively high hardness and is hardly damaged, does not show a large change in impact strength in a wide temperature range of -40 ° C to 23 ° C, and has dimensional stability. Acrylonitrile / butadiene / styrene resin (ABS resin) is preferable because it has excellent insulation properties and is hardly affected by temperature and humidity, and has excellent moldability and coloring properties. The base made of ABS resin is generally manufactured by injection molding.

[0005]

However, if a nail is hit on 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 cannot be obtained.
The driven nail becomes unstable. In addition, there is a possibility that a crack is generated in the nail driving portion and the strength of the base itself is reduced.

Therefore, in a game board 2 for a ball game machine as shown in FIG. 2, for example, as shown in FIGS. 3 and 4, a hole 41 into which a nail 6 can be driven from the game surface side of the base 21 is formed. It is conceivable that the boss 32 provided is integrally formed on the back surface of the base 21. The invention of such a game board has been applied for a patent by the present applicant (Japanese Patent Application No. Hei 3-129888).
issue). According to this game board, by providing a boss with a hole on the back side of the position where the nail is driven, the nail can be easily driven in spite of being a synthetic resin base, and the driven nail is Can be reliably held.

[0007] However, the following problems have occurred in the production of such a game board. That is, the bosses (nailing portions) formed integrally with the base are widely distributed over the entire game board and large in number. Therefore, as shown in FIG. In some cases, the dimensional accuracy of the portion where the mold 32 is formed is not sufficient, and the core C for forming the boss hole does not reach the bottom of the concave portion of the mold B. For this reason, a runner part D (thickness α) is formed in the concave part of the mold B, and a hole penetrating the boss 32 cannot be formed. When such a boss is formed, the hole into which the nail is driven cannot be seen from the back side of the base (projecting side of the boss). It becomes difficult to push the nail toward the game surface by aligning the nail removal jig 60 from the back side of the base with the hole as shown in FIG. Further, when the jig for nail removal is pushed into the boss, the boss may be damaged.

Accordingly, an object of the present invention is to provide a boss of a nail driving portion provided on a game board made of a synthetic resin, not only to facilitate driving of the nail and to securely hold the driven nail, but also to prevent the nail from being driven. The purpose is to form a nail so that it can be quickly and easily removed when it is desired.

[0009]

According to the present invention, a boss having a nail driving hole into which a nail is driven from the playing surface side of the base is integrally formed on the back surface of the base. In the formed game board for a ball-and-ball game machine, another hole is provided on the projecting side of the boss so as to be aligned with the nail driving hole.

It is preferable that the another hole is formed in a conical shape that gradually becomes narrower from the projecting end of the boss toward the center thereof.

It is preferable that the nail driving hole is formed at an angle of 3 to 5 degrees from the center axis of the boss portion obliquely downward from the game surface.

[0012]

In the game board of the present invention, a 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. At the same time, the nail driven into the hole is held with an appropriate force. In addition, another hole centered with the nail driving hole is provided on the protruding side of the boss, so when the nail that is driven is to be removed, the nail driving hole is not visible from the back side of the base. Even so, the nail can be quickly pushed out to the game surface side by pushing the jig for nail removal from the back side of the base into another hole and pushing it in.

When the nail driving hole is formed so as to face diagonally downward from the game surface, the nail driven into this hole projects diagonally upward on the game surface side, and the game ball hits the game when the ball hits the nail. It is easier to control the direction in which the ball rebounds. Also in this case, the hole provided on the protruding side of the boss is formed in alignment with the inclined nail driving hole, so that
The nail removal operation can be performed quickly and reliably.

[0014]

FIG. 1 shows a sectional shape of a boss of a nail driving portion which is a feature of a game board according to the present invention. FIG. 2 shows a game surface side of a game board for a pachinko game machine to which the present invention is applied, and FIG. 3 shows a back side of the game board.

In the center of the game board 2 shown in FIGS. 2 and 3,
A circular game surface 4 surrounded by guide rails 3 is provided, and when a player operates a hitting handle provided at a lower front part of a pachinko game machine (not shown) on which the game board 2 is installed, a game is played. A game ball is fired from a firing device attached to the back side of the board 2 and is launched 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 the game balls that have been launched, while a plurality of winning devices are arranged. As the winning device, in addition to the winning opening, a known variable winning device that is converted into a first state that is disadvantageous to the player and a second state that is advantageous to the player with respect to winning of the game ball is provided.

The game board 2 includes a base 21 made of ABS resin,
Decorative plate 22 on which a pattern is printed and adhered to the surface of the base
Consisting of On the surface of the decorative board 22, a frame 23 and a guide rail 3 forming a game surface are mounted. A large number of nails 6 arranged on the game surface 4 are fixed by being driven from above the decorative board 22.

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, and 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 inside the box. It is provided. In the center of the box, annular reinforcing ribs 33a and 33b whose center is formed on the surface on the opposite side of the base 21 and concentric with the circular game surface 4 are formed integrally with the base 21. In places where reinforcement is preferred, such as around the openings 24, 25, 26 and 27,
A reinforcing rib 34 is provided integrally with the base 21.

Here, the boss 32 has a nail driving hole 41 penetrating the base 21 and the boss 32 as shown in FIG. 4, and preferably has a center axis of the hole 41 and a normal line of the game surface. The nail 6 is formed so that the angle θ is about 3 to 5 ° and the nail 6 does not penetrate to the back side. However, as shown in FIG. It may not be a through-hole, making nailing work difficult. However, according to the present invention, a boss is formed which can easily drive and remove a nail regardless of whether or not the nail driving hole is a through hole.

The embodiment of FIG. 1 will be described. This is based on a molded body made of a synthetic resin like the game board 21 of FIG. 4, and has a nail driving hole 51 extending from the game surface side to the back side. Is formed integrally with the back surface of the base, and another hole 53 is provided on the projecting side of the boss 52 so as to be aligned with the nail driving hole 51. In this case, the other hole 53 is formed in a conical shape that gradually becomes narrower from the protruding end of the boss 52 toward the center thereof, and the inner surface thereof is a tapered surface 54. On the other hand, the nail driving hole portion 51 is formed obliquely downward from the gaming surface side of the base similarly to the hole portion 41 of FIG. In this case, the centers of the two holes 51 and 53 coincide with each other at the position where they meet.

The nail driving hole 51 and the other hole 53 are simultaneously formed so as to penetrate each other.
Actually, as described with reference to FIG. 5, the partition wall 55 may be formed due to the molten metal running part at the time of molding.
In the present invention, such a partition wall may be formed. That is, a partition wall 55 may be provided between the nail driving hole 51 and another hole 53 as in the embodiment of FIG.

Next, the nail driving and nail pulling operations of the game board having the nail driving portion formed as shown in FIG. 1 will be described.

First, since the base is made of an ABS resin molded body, the portion of the boss 52 protruding to a predetermined height has considerable strength, while the provision of the hole 51 allows the nail 6 to be easily driven. be able to. That is, the nail 6 is the boss 5
2. It is sufficient to drive the nail 6 in the same position as in the prior art, eliminating the disadvantage that the skilled worker tends to arbitrarily determine the arrangement of the nails 6 as in the related art. It is possible to mass-produce the gaming boards arranged.

Since the boss 52 is formed at the above-mentioned height, when the nail 6 is driven into the hole 51 with its head protruding at a predetermined height, the tip of the nail 6 does not penetrate to the back side.
There is no hindrance to wiring or the like. Further, since the hole 51 and the driven nail 6 have a sufficient contact length, the nail 6 is securely held. In addition, it is desirable that a nail located at a position where the game ball hits frequently, for example, a so-called top nail located at the top of the game surface, is held stronger than nails at other positions. In such a case, the force for holding the nail can be adjusted by adjusting the diameter of the hole 51.

On the other hand, when pulling out the nail 6 driven into the hole 51, a nailing operation is performed using a jig 60 as shown in FIG. The jig 60 has a cylindrical main body 6 serving as a grip portion.
The main body 61 is provided with knurls, i.e., mesh-like irregularities 63, on its peripheral surface on the base end side.

The tip of the protrusion 62 of the jig 60 is
(A) As shown in FIG.
It has become. The shape of such a concave portion is not limited to FIG. 7A, and may be a cone as shown in FIG. 7B or a pyramid as shown in FIG. With such a recess,
During the nail removal operation, the tip of the jig 60 can easily catch the tip of the nail 6 and the center of the tip of the jig 60 can easily match the center of the tip of the nail.

The nail pulling operation is performed as follows. First, as shown in FIG. 8, the projecting portion 6 of the jig 60 is inserted into the hole 53 on the projecting side of the boss 52 into which the nail 6 to be removed is driven.
2 and push it into the game side (left side in the figure) as it is. Accordingly, if there is a partition wall 55 between the nail driving hole 51 and the other hole 53, the partition wall 55 is pushed and broken, and the tip of the jig 60 enters the hole 51, and the nail 6
Capture the tip of the. Therefore, when the jig 60 is further pushed in, the nail 6 is pushed out to the game surface side as shown in FIG. 9, and the nail removal ends when the tip end of the nail 6 finally comes out of the hole 51.

Thus, even if the nail driving hole 51 is not visible from the back side of the base because of the partition wall 55, the nail removing jig 60 can be pushed into the other hole 53 from the back side of the base. If this is the case, the nail 6 can be quickly pushed out to the game side, and the efficiency of the nail removal operation is greatly improved.

[0028]

As described above, according to the present invention, a boss having a hole into which a nail is driven protrudes from the back side of the game board, and the boss has a protrusion aligned with the nail driving hole. Since one hole is provided, the nail can be easily driven in spite of being a game board including a base made of synthetic resin, and in addition to being able to reliably hold the driven nail, When you want to pull out a nail, even if you can not see the nailing hole from the back side of the base, just push the nailing jig into the other hole and push it in, the nail will quickly move to the game side In addition, it can be reliably pushed out and extracted. Therefore, anyone can easily perform the nail removal operation and there is no possibility of damaging the boss.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a nail driving boss portion of a game board which is a feature of the present invention.

FIG. 2 is a perspective view showing a game surface side of a game board to which the present invention is applied.

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

FIG. 4 is a cross-sectional view showing a boss portion of a game board having a through hole for nail driving.

FIG. 5 is a cross-sectional view of a mold for forming a boss portion of the game board.

FIG. 6 is a perspective view showing a jig used for extracting a nail driven into a boss portion of the game board.

FIG. 7 is a view showing an example of the shape of the tip of the jig in FIG. 6;

FIG. 8 is a sectional view showing a starting state of an operation of extracting a nail using the jig of FIG. 6;

FIG. 9 is a cross-sectional view showing a state where a nail is pulled out using the jig of FIG. 6;

[Explanation of symbols]

2 ... game board, 3 ... guide rail, 4 ... game surface, 6 ... nail,
21 ... base, 22 ... decorative board, 23 ... frame, 24, 25,
26, 27 ... opening, 31 ... frame, 32 ... boss, 33
a, 33b: annular reinforcing rib, 34: reinforcing rib, 41 ...
Hole, 51: nail driving hole, 52: boss, 53: another hole, 54: tapered surface, 55: partition wall, 60:
Jig, 61 ... body, 62 ... projecting part, 63 ... knurl,
64 ... recess.

Claims (3)

(57) [Claims] 1. A ball-and-ball game machine having a molded body made of a synthetic resin as a base, and a boss having a nail driving 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. A game board for a ball-and-ball game machine, wherein another hole is provided on the projecting side of the boss so as to be aligned with the nail driving hole. 2. The game for a ball game machine according to claim 1, wherein said another hole portion is formed in a conical shape that gradually narrows from a projecting end of said boss toward a center portion. Board. 3. The game board for a ball game machine according to claim 1, wherein said nail driving hole portion is formed obliquely downward from said game surface side.