JP2001037977A - Device for preventing ball back-flow of balls of pachinko game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a preventive device for preventing the back flow of balls of the pachinko game machine that has no bad influence on shot ball's springing out to the playing area. SOLUTION: A preventive device for preventing the back flow of balls 30 is comprised of an installation holder 31, which is placed as its upper end protrudes more upwardly than the upper end part of a leading inner rail 2b set up inside a game board, and an elastic thin part 50, which is installed to the installation holder 31 and is placed extending near guidance outer rail 2a set up outside the game board. By so doing, it reduces much of the influence of the elastic thin part 50 on the shot ball and enables the shot ball to reach nearly a location where a game player has aimed at. On the other hand, if the shot ball reaching a playing area collide with an obstacle nail or the like and is about to return to a guidance rail 2, it is stopped, and its back flow is prevented with certainty.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball backflow prevention device provided on a game board and provided at an entrance portion of a guide rail for guiding shot balls shot into a game area.

[0002]

2. Description of the Related Art Conventionally, after a shot ball hits a game area of a game board along a guide rail, the shot ball flows back to the guide rail again and collides with the next shot ball. In order to prevent a situation in which the firing operation is not performed smoothly, there has been known a device in which a ball backflow prevention device is installed on a rail portion in a guide.

[0003]

Although such a ball backflow prevention device can reduce the backflow to the guide rail, the ball backflow prevention device has an adverse effect on the hitting of the ball into the game area, and the position targeted by the player. There is a problem that the ball cannot be stably reached. In addition, there is also a problem that the mounting to the guide rail portion is troublesome. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a ball backflow prevention device for a ball game machine which does not adversely affect the hitting of a ball into a game area. It is in.

[0004]

According to the present invention, a ball provided on a game board and provided at an entrance to a game area of a guide rail for guiding a shot ball is provided. In the backflow prevention device, the ball backflow prevention device is mounted on the mounting holder, the mounting holder being disposed such that the upper end protrudes upward from the upper end portion of the guide inner rail provided inside the game board. And a backflow prevention piece which is extended near a guide outside rail provided outside the game board and easily fluctuates in a hitting direction of a hit ball.

[0005]

The fired ball hits the game area by pushing open the backflow prevention piece that closes the entrance of the game area. At this time, since the backflow preventing piece easily fluctuates with respect to the hitting direction of the hitting ball, the influence on the hitting ball is extremely small, and the hitting ball can reach the position almost aimed by the player. on the other hand,
Even if a ball hitting the game area collides with an obstacle nail or the like and tries to return to the guide rail, it is blocked by the backflow prevention piece and the backflow is reliably prevented.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. First, a configuration of a game board 1 of a ball game machine to which the ball backflow prevention device 30 according to the embodiment is applied will be described with reference to FIGS. 4 and 5. FIG.
FIG. 5 is a perspective view showing a relationship between the game board 1 and the ball backflow prevention device 30, and FIG. 5 is a front view of a game area 5 surrounded by the guide rail 2 of the game board 1. In FIGS. 4 and 5,
A game device such as a prize device provided in a game area 5 to be described later is illustrated.

In the figure, a game board 1 is formed of a substantially square plywood, and a guide rail 2 is provided on the surface thereof in a substantially circular shape. Describing in more detail, the guide rail 2 turns clockwise from the lower part of the game board 1 to reach the upper right side of the game board 1, and turns clockwise from the end of the guide outer rail 2a. A guide inner rail 2b reaching the upper left side of the game board 1; and a guide outer rail 2a and a guide inner rail 2 on the left side of the game board 1.
A portion overlapping with b constitutes a ball guide path 3 for guiding a shot ball that has been fired, and an area surrounded by an upper part of the outer guide rail 2a and the inner guide rail 2b is a game area 5. In the illustrated embodiment, an elastic member 4 made of rubber or synthetic resin is attached to the end of the outer guide rail 2a and the start end of the inner guide rail 2b. It is forced to fall toward the area 5.

By the way, as shown in FIG. 5, a firing rail 6 is provided via a foul opening 7 on the downstream side of the starting end of the outside guide rail 2a (this firing rail 6 is generally a game board). 1 and not on the game board mounting frame), the end of this firing rail 6 and the outside guide rail 2a
Is formed in the shape of a step. That is, by mounting each rail so that the end of the firing rail 6 is higher than the outside guide rail 2a, the shot ball (arrow a) fired smoothly without colliding with the end of the outside guide rail 2a. When there is a ball that returns backward without reaching the game area 5, the return ball (arrow b) collides with the lower end of the firing rail 6, and a foul opening is formed. 7 is ensured. In many cases, this structure prevents a plurality of hit balls from accumulating at the firing position 6a located at the base of the firing rail 6, thereby eliminating double hits. Some jump when reaching the lower part of the non-guide rail 2a or jump over the foul opening 7 when colliding with the next shot ball and jumping. A lower backflow prevention device 8 is provided at the upper end of the firing rail 6 in order to surely guide the return ball jumping over the foul port 7 to the foul port 7.

The lower backflow prevention device 8 will be described briefly. The lower backflow prevention device 8 is mounted on the game board 1 and supported on the upper front of the mounting plate 9 at the upper end thereof so as to be swingable. The swinging rod 10 provided and the swinging rod 1
And a stopper projection 11 projecting rearward from the lower end of the zero. Thus, the swinging rod 10 can swing with respect to the left side (that is, the firing direction of the hit ball) in FIG. 5, but can swing with respect to the right side (that is, the returning direction of the return ball) in FIG. The swing is stopped. For this reason, when the firing ball is fired, it jumps at the upper part of the firing rail 6 for some reason, and swings.
Even if the ball hits the ball, the shot ball reaches the hit ball guide path 3 while swinging the swinging rod 10 clockwise due to the momentum, so that the shot ball does not return to the shooting position 6a again. On the other hand, when the return ball that has jumped over the foul port 7 collides with the swinging rod 10, the swinging of the swinging rod 10 is stopped by the stopper projection 11, so that the return ball hits the swinging rod 10. It falls down and is guided to the foul opening 7.

As described above, the lower backflow prevention device 8 reliably guides the return ball returning without reaching the game area 5 to the foul port 7. And in this embodiment,
A ball backflow prevention device 3 to be described later, which constitutes a main part of the present embodiment.
In addition to preventing the ball hitting the game area 5 from returning to the firing position 6a of the firing rail 6 again with 0,
The hit ball that does not reach the game area 5 is also prevented from returning to the firing position 6a of the firing rail 6 by the lower backflow prevention device 8, so that double hitting can be reliably prevented as a whole. Although the lower backflow prevention device 8a shown in FIG. 4 is shown in which the upper part of the swinging rod is directly driven into the game board 1 with a nail, the swinging rod is also stopped in this case, though not shown. A stopper projection is provided.

The shot ball reaches the game area 5 through the ball guiding path 3, but the ball guiding path 3.
In the end portion of the game area 5, in other words, at the entrance 12 of the game area 5, a ball backflow prevention device 30 constituting a main part of the present embodiment is provided. The ball backflow prevention device 30 will be described in detail later, but the elastic thin piece 50 as the backflow prevention piece constituting the ball backflow prevention device 30 almost completely divides the ball guiding path 3 and the game area 5. The inlet 12 is closed.

Here, the configuration of the game area 5 will be briefly described with reference to FIG. 5. In the game area 5, a large number of game devices operated by hitting balls falling, for example, variable display devices 13, variable winning ball device 14, starting port device 15, winning ports 16a, 16b with windmill, windmill 1 with lamp
7a, 17b, passage openings 18a, 18b, etc. are disposed at appropriate positions, and side lamps 19a, 19b that are turned on or blinked according to a game state are also provided. Also,
Many obstacle nails 21 that change the falling direction and speed of the hit ball
(Generally 200 to 300) and a windmill 22 (winning holes 16a, 16b with windmills and windmills 17a, 17b with lamps)
Also have the same function), and the game area 5
Out port 20 that collects the ball that did not win at the bottom of the game
Is also formed.

The configuration of the game area 5 is substantially the same as that described above, but the game board 1 is further provided with rail decorations 23 on the upper left and right sides outside the guide rail 2 as shown in FIG.
Further, a positioning hole 24 and a fixing hole 25 for positioning and fixing the ball backflow prevention device 30 are formed inside the upper end of the guide inner rail 2b. Two positioning holes 24 are formed with the fastening hole 25 interposed therebetween. The ball backflow prevention device 30 attached to the positioning hole 24 and the fastening hole 25 includes an attachment holder 31 attached to the game board 1 and an elastic thin piece 50 attached to the attachment holder 31.

The detailed structure of the ball backflow prevention device 30 will now be described with reference to FIGS. FIG.
FIG. 2 is a front view showing a state in which the ball backflow prevention device 30 is attached to the game board 1 and a state in which only the ball backflow prevention device 30 is turned over. FIG. 2 is a side view of the ball backflow prevention device 30 viewed from the guide inner rail 2a side. FIG. 3 is a side view of the ball backflow prevention device 30 as viewed from the elastic thin piece 50 side. In the figure, the mounting holder 31 has a boat-like shape having a pointed tip with a thickness substantially equal to the width of the guide inner rail 2b, and a screw hole 32 penetrating vertically is formed at the center thereof.
Positioning bosses 33 protrude downward from both ends of the bottom surface. Thus, by engaging the positioning boss 33 with the positioning hole 24, the accuracy of mounting the ball backflow prevention device 30 to the game board 1 is uniquely ensured, and the ease of the mounting is also ensured. Is done. However, in the present embodiment, as described below, the rail engagement portion 34
The accuracy and easiness are further increased by the engagement between the rail engaging groove 35 formed at the upper end and the upper edge of the guide inner rail 2b. The screw holes 32 correspond to the fixing holes 25. The screw 45 shown in FIG.
To be fixed.

On both sides of the mounting holder 31, a gentle curved surface 36, one of which matches the curvature of the guide inner rail 2b.
(Hereinafter, this curved surface is referred to as a rail contact curved surface 36), while the other is a curved surface 39 whose curvature becomes larger toward the tip (upper end) (hereinafter, this curved surface is referred to as a flake contact curved surface 39). It is configured. The rail contact curved surface 36 is formed over substantially the entire length of the mounting holder 31, whereas the lamella contact curved surface 39 is terminated by a cutout portion 40 formed from the rear end (lower end). ing.

Incidentally, a rail engaging portion 34 in which a rail engaging groove 35 is formed along the upper surface edge of the rail contact curved surface 36 is formed so as to protrude toward the side.
The rail engagement groove 35 can be fitted into the upper edge of the guide inner rail 2b when the 0 is fixed to the game board 1. Thereby, the accuracy and ease of mounting the ball backflow prevention device 30 to the game board 1 are further increased. A notch recess 37 is formed at the center of the bottom surface of the rail contact curved surface 36. The notch 37 is formed in the guide inner rail 2.
b is fixed to the game board 1 for accommodating the head of the rail fixing pin 38 projecting left and right at the base of the guide inner rail 2b, whereby the mounting holder 31 is attached to the guide inner rail 2b. It can be attached closely.

On the other hand, at the rear end of the thin piece contact curved surface 39 side,
The notch 40 is formed as described above, and the notch 40
A thin section mounting space 41 is formed at the rear end of the mounting holder 31 so as to be continuous. This thin section mounting space 41
As shown in the inverted drawing of FIG. 1 (B), it is formed in a substantially U-shape, and a later-described winding portion 51 of the elastic thin piece 50 is formed.
Are stored in close contact with each other. A boss 42 is provided at the center of the thin piece mounting space 41 to prevent the mounted elastic thin piece 50 from coming off. In addition, as shown in FIG. 3, the lamella abutting curved surface 39 may be formed with a regulating protrusion 43 having a tapered surface formed inward and downward at a distance substantially equal to the width of the elastic lamella 50. good. By forming the restricting projection 43, it is possible to prevent the mounted elastic thin piece 50 from being displaced in the vertical direction, and
Even if the elastic thin piece 50 vibrates greatly, it returns to a predetermined position by the tapered surface.

The elastic thin piece 50 mounted on the mounting holder 31 having the above-described configuration is formed of a thin steel sheet (thickness of about 0.5 mm) or a thin sheet of synthetic resin in a substantially rectangular shape. The base part is a winding part 51 bent in a U-shape along the internal shape of the thin piece mounting space 41. Therefore, the winding part 51 is inserted into the thin-piece mounting space 41 from the back surface of the mounting holder 31 and at the same time, the front part is put out of the notch part 40 and the thin-piece contact surface 3
The elastic thin piece 50 can be attached to the mounting holder 31 by following along 9. In this way, when the mounting holder 31 to which the elastic thin piece 50 is mounted is attached to the upper end of the guide inner rail 2b by the fastening method described above, the tip of the elastic thin piece 50 reaches the vicinity of the guide outer rail 2a, The entrance portion 12 of the winning area 5 is almost closed. When this state is viewed from the whole of the game board 1, as shown in FIG.
Is extended to the vicinity of. The attachment holder 31 is attached such that the upper end thereof is located above the upper end of the inner guide rail 2b.

As shown in FIGS. 2 and 3, a trapezoidal guide hole 52 tapering in the direction of the hit ball is provided on the bottom surface of the portion of the elastic thin piece 50 protruding from the mounting holder 31. Is formed. The guide hole 52 is a ball that flies on the ball guide path 3 and captures a ball that rises slightly above the game board 1 and flies and is stably directed toward the game board 1. At the same time as having a function of releasing the elastic thin piece 50 itself to the game area 5, it has a function of reducing the elastic force of the elastic thin piece 50 itself and suppressing an adverse effect on the strength of the hit ball. Note that the guide hole 52 may be formed over substantially the entire length of the elastic thin piece 50.

The ball backflow prevention device 3 configured as described above
At 0, first, the positioning boss 33 formed on the mounting holder 31 is engaged with the positioning hole 24 of the game board 1, thereby improving the accuracy and ease of mounting the ball backflow prevention device 30 to the game board 1. As well as being secured, the positioning makes it possible to use an automatic production system or a robot to perform the production process. In particular, in the present embodiment, the positioning boss 3
3 as well as the rail fixing pin 38
And the guide inner rail 2
The positioning by the engagement of the upper edge of the b with the rail engaging groove 35 of the rail engaging portion 34 can improve the accuracy and ease of the mounting described above.

Further, in the ball backflow prevention device 30, since the elastic thin piece 50 is formed of an extremely thin elastic plate,
The adverse effect of the hit ball on the flight to the game area 5 can be greatly suppressed. In particular, since the elastic thin piece 50 in the present embodiment has its base supported by the lower end of the mounting holder 31, the movable length of the elastic thin piece 50 itself becomes longer as shown by the broken line in FIG. For this reason,
Since the moment of inertia for pushing and opening the elastic flake 50 is small, the degree of weakening the impact of the ball is reduced, and the above-mentioned adverse effect on the ball can be further suppressed.

On the other hand, when the hit ball which has once reached the game area 5 collides with the obstacle nail 21 and rebounds and collides with the elastic thin piece 50, the tip of the elastic thin piece 50 comes into contact with the outside guiding rail 2a, Since the ball does not move any more, the hit ball does not return to the hitting guide path 3, and is reliably dropped toward the game area 5. In this way, by eliminating the return ball by the ball backflow prevention device 30, not only the double hitting can be prevented, but also the operation rate of the ball game machine can be improved.

The ball backflow prevention device 30 according to the above-described embodiment (hereinafter, referred to as a first embodiment) is shown as a thin plate as the elastic thin piece 50. However, the embodiment shown in FIGS. In the ball backflow prevention device 60 according to the second embodiment), the elastic thin piece 61 is formed of a wire. In this case, the elastic thin piece 61 may be mounted on the mounting holder 31 by bending the wire into a rectangular shape and winding the base winding portion 63 around the boss 42 of the mounting holder 31. Thus, also in the elastic thin piece 61 according to the second embodiment, the interval space 6 extends over the entire length.
2 is formed, a certain amount of elastic force can be applied, and the space 62 exerts the same function as the guide hole 52 of the first embodiment, so that the flying ball can be stably formed. Can be guided. The attachment holder 31 according to the second embodiment is exactly the same as the attachment holder 31 according to the first embodiment.

Further, in the embodiment shown in FIG. 8 (hereinafter referred to as a third embodiment), the above-mentioned guide inner rail 2b is formed as a resin guide inner rail 70, and this resin guide inner rail 70 and the upper end ball are formed. The backflow prevention device 80, the lower backflow prevention device 90 at the lower part, and the out port 100 are integrally formed. In this case, the ball backflow prevention device 80 integrally molds only the mounting holder 31 with the resin guide inner rail 70, and the lower backflow prevention device 90 mounts only the mounting plate 9 and the stopper protrusion 11 on the resin guide inner rail. 70 and are integrally molded. With this configuration, the mounting operation of the two-stage ball backflow prevention device can be performed extremely easily and accurately. In FIG. 8, the resin-made guide inner rail 70 has a length from the lower portion to the upper left portion, but the portion shown by a dashed line indicates a rail portion constituted by a rail decoration. is there. Further, the ball backflow prevention device 80 shown in the third embodiment is not necessarily the same as that of the first embodiment and the second embodiment, but may be one in which a holder portion for simply attaching an elastic flake is formed.

[0025]

As is apparent from the above description, in the present invention, the ball backflow prevention device is configured such that the upper end protrudes upward from the upper end of the guide inner rail provided inside the game board. And a backflow prevention piece mounted on the mounting holder and extending near a guiding outer rail provided outside the game board and easily fluctuating in a hitting direction of a hit ball. Since the impact of the backflow prevention piece on the hit ball is extremely small, the hit ball can reach the position almost aimed by the player, while the hit ball reaching the game area becomes an obstacle nail etc. Even if a collision is attempted to return to the guide rail, the backflow is prevented by the backflow prevention piece and the backflow is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a ball backflow prevention device according to an embodiment is attached to a game board and a state in which only the ball backflow prevention device is turned over.

FIG. 2 is a side view of the ball backflow prevention device as viewed from a guide inner rail side.

FIG. 3 is a side view of the ball backflow prevention device as viewed from an elastic flake side.

FIG. 4 is a perspective view showing a relationship between a game board and a ball backflow prevention device.

FIG. 5 is a front view of a game area surrounded by guide rails of the game board.

FIG. 6 is a side view of a ball backflow prevention device according to another embodiment.

7 is a side view of the ball backflow prevention device of FIG. 6 as viewed from the opposite side.

FIG. 8 is a schematic front view of a game board provided with a ball backflow device according to still another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 game board 2 guide rail 2a guide outer rail 2b guide inner rail 3 hitting ball guide path 5 game area 12 entrance 24 positioning hole 30 ball backflow prevention device 31 mounting holder 33 positioning boss 50 elastic thin piece (backflow prevention piece) 60 ball backflow Prevention device 61 Elastic thin piece (backflow prevention piece) 70 Resin guide inner rail 80 Ball backflow prevention device

Claims (1)

[Claims] 1. A ball backflow prevention device provided on a game board and provided at an entrance portion of a guide rail for guiding a shot hitting a ball into a game area, wherein the ball backflow prevention device is provided inside the game board. A mounting holder arranged such that the upper end thereof protrudes upward from an upper end of the provided inner guide rail, and extends near the outer guide rail mounted on the mounting holder and provided outside the game board. And a backflow preventing piece which fluctuates easily with respect to the hitting direction of the hit ball.