JP2001334029A - Reverse flow preventive device for pachinko machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reverse flow preventive device for a pachinko machine, which can smoothly guide game balls to a game region, and can prevent the game balls from reversing by members of a minimum necessity, and of which the constitution is simple. SOLUTION: A reverse preventive member 13 is attached to a shooting rail 3. A preventive piece main body 16 has a length which reaches an external guiding rail 4a, is normally is erected, and keeps a gap 6. The preventive piece main body 16 gradually warps by a shot game ball 7, closes the gap 6, and smoothly guides the game ball 7 to the external guiding rail 4a. When the game ball 7 passes, the preventive piece main body 16 erects. The preventive piece main body 16 has elasticity, absorbs a repulsive force accompanying the contact with an internal guiding rail 4b, and does not vibrate. Therefore, the preventive piece main body 16 does not greatly change the spring force of the game ball 7 which is received next, and a ball flying location in the game region can be kept uniform. Compared with a conventional technology wherein a weight is attached, the number of part items is smaller, and the miniaturization and the productivity can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back-up prevention device for a pachinko machine for preventing a shot game ball from returning to a shooting position.

[0002]

2. Description of the Related Art Conventionally, as an example of a back-up prevention device of a pachinko machine for preventing a shot game ball from returning to a shooting position, there is a device shown in FIG.

A back-up prevention device 2 (back-up prevention device of a pachinko machine) shown in FIG. 9 provided in a pachinko machine is an externally mounted state fixed to a firing rail 3 and a game board with fastening pins, fastening screws and the like. A foul ball passage 5 is provided between the guide rail 4a and the distal end of the firing rail 3 and the outer guide rail 4a.
A step h is provided in the gap 6 between the base a and the base a.

In this device, a game ball 7 fired by a hitting device (not shown) and reaches the tip of the firing rail 3
Jumps over the gap 6 to the outer guide rail 4a and is guided by the outer guide rail 4a to a game area (not shown).
Further, although the game ball 7 jumps from the firing rail 3 to the outer guide rail 4a, the energy at the time of firing is insufficient, and the tip of the inner guide rail 4b (a discharge port for the game area 8).
If the ball is not sent to the game area 8 without reaching the game area 7, or the game ball 7 collides with a nail in the game area and returns to the guide rail,
The game ball 7 is returned toward the gap 6 (the game ball 7 thus returned is hereinafter referred to as a foul ball or a return ball, as appropriate).
The return ball is guided to the foul ball passage 5 directly with or without contact with the distal end portion of the firing rail 3 which is higher than the base end portion of the guide rail by the step h. Like that. That is, the provision of the step h prevents the return ball from returning (reversing) to the ball hitting device side.

[0005] In addition, in a back-up prevention device for a pachinko machine disclosed in Japanese Utility Model Publication No. 30-4423, a part of an arcuate ball conductive plate is cut off to provide an opening and closing opening, and a central portion of an opening and closing valve having an opening and closing valve plate is provided. The opening and closing opening is pivotally supported at the lower part of the hitting rod side, and the tip end protrudes above the arcuate ball guide plate, and the weight is attached to the lower end.

In this device, when the ball hit by the hitting rod reaches the opening / closing opening, the tip of the opening / closing valve falls down due to the resilience of the ball, closing the opening / closing opening, and the ball falls. This allows the door to pass through without opening. When the ball passes through the opening / closing opening, the opening / closing valve automatically rises because the lower portion is heavy due to the weight, and opens the opening / closing opening to return the ball to the lower ball guiding gutter.

[0007]

However, in the prior art shown in FIG. 9, when the game ball 7 moves from the launch rail 3 to the outer guide rail 4a over the opening (gap 6) of the foul ball passage 5, Since the outer guide rail 4a is formed in an arc shape and has a step h, the game ball fired from the firing rail 3 is in a linear direction as shown by arrow A, whereas the outer guide rail 4a is Since the game ball landed on the outer guide rail 4a in a fixed state on the game board, the launching direction changes suddenly in the direction of arrow B, so that the impact ball receives an impact from the outer guide rail 4a. The resilience of the ball is reduced. In addition, there is a problem that the outer guide rail 4a is deformed (wears) due to the impact force at the landing point, the resilience is likely to change, and the flying ball position in the game area 8 is not determined, resulting in a variation.

In the prior art disclosed in Japanese Utility Model Publication No. 30-4423, since the on-off valve is controlled by the weight, the impact changes when the ball collides is large, and the ball smoothly moves on the outer guide rail. I couldn't move over and it was easy to cause uneven jumping.

Further, an on-off valve provided with a weight at its lower end is required to be rigid because a flexible member cannot easily open and close the opening. Since the on-off valve swings up and down around a pivotally supported axis, and the tip side of the on-off valve descends from the arcuate ball guide plate, it is conceivable that the game ball is not smoothly guided to the arcuate ball guide plate.

When the ball passes through the opening in the state where the on-off valve is lying down, the on-off valve rotates around the support shaft and stands up due to the load of the weight as described above. At this time, a member for maintaining the on-off valve in the upright state (upright maintaining member)
When the on-off valve comes into contact with the on-off valve, the on-off valve is directly received without absorbing the reaction force of the abutment because it is rigid,
Rotate in the opposite direction. Thereafter, after the amount of rotation of the on-off valve and the load on the weight are balanced, the on-off valve again comes into contact with the upright maintaining member due to the load on the weight, and thereafter, the same operation is performed, and the on-off valve vibrates.

[0011] When the on-off valve vibrates as described above, the force that causes the on-off valve to fall down changes according to the vibration position, and the elastic force remaining on the ball when passing through the opening and closing changes. Along with this, there arises a problem that the flying ball positions in the game area vary greatly.

[0012] Further, in the pachinko machine, since it is necessary to arrange many game members in a limited space, it is desired to reduce the number of parts and the number of parts. However, in this device, a weight is attached to the on-off valve as compared with the device shown in FIG. 9, so that the number of parts increases and a large space is required in consideration of the rotation of the weight. It could not meet the demand.

The present invention has been made in view of the above circumstances, and has a simple configuration of a pachinko machine capable of smoothly guiding a game ball to a game area and preventing reverse movement of the game ball with minimum necessary members. It is an object of the present invention to provide a back-up prevention device.

[0014]

According to the first aspect of the present invention,
A launch rail that guides a game ball fired by a hitting device, a guide rail that guides a game ball from the launch rail to a game area, and a space formed between the launch rail and the guide rail, An elastic piece holding a base end on the side of the launch rail, the elastic piece having a length reaching the guide rail by bridging the space, and the distal end being upward from the upper surface of the guide rail. Characterized in that they are spaced apart from each other.

According to a second aspect of the present invention, in the configuration according to the first aspect, the base end of the elastic piece is held on the firing rail. According to a third aspect of the present invention, in the configuration according to the first aspect, the base end of the elastic piece is held on a mount provided near the end of the firing rail. According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the elastic piece abuts the tip of the elastic piece against another member when the game ball does not act. It is characterized by having.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A back-up prevention device 2 (back-up prevention device for a pachinko machine) provided in a pachinko machine 1 according to a first embodiment of the present invention will be described with reference to FIGS. FIG.
FIG. 2 is a perspective view showing a state in which the game board is removed and the front frame (B) is further opened, and FIG. 2 is a perspective view in which the game board is mounted on the machine frame body (Z).

As shown in FIGS. 1 and 2, the pachinko machine 1
Is composed of an outer frame (A) and a front frame (B) so that the game board (C) is detachably housed in a box-shaped mounting portion (O) provided on the back of the front frame (B). Is a so-called separate pachinko machine, in which a front frame (B) hinged to a side of an outer frame (A) with a hinge (N) is opened, and a glass frame (J) and a front plate (M) are opened. By doing so, the front part of the mounting part (O) is opened so that the game board (C) can be removed.

The front frame (B) has a frame (J ') with a glass (I) covering the front of a game board (C) on a window (T') opened in a frame shape, and a prize on the front. A front plate (M) having an upper plate (K) for receiving a ball, guiding game balls from the upper plate (K) to a hitting ball supply device (L) provided on the back surface and sending the ball to a firing position (P) of a firing rail 3. Are hinged so that they can be freely opened and closed.

At the firing position, a ball receiving member (W) for receiving the sent ball is provided above the base end of the firing rail 3, and a game ball is provided with a V groove of the firing rail 3 and a ball receiving member (W) described later.
At the firing position (P).
A batting hammer (F) of a ball hitting device for firing a game ball based on the operation of the operation handle 11 faces the base end of the firing rail 3.

The mounting portion (O) is provided with a game board cradle (Q) at the lower end, the above-mentioned firing rail 3 on the front surface thereof, and a lower plate (R) for receiving a return ball and receiving a lower prize ball. Is provided with a foul ball passage (S) for guiding the ball.

A large window (T) is opened in the rear part of the mounting part (O), and a shallow box is attached so as to cover the window (T) from behind to form a ball approaching chamber (U). A communication port (V) for communicating with a winning ball detection device (not shown) is opened at the lower end. When the game board (C) is mounted on the front frame (B), as shown in FIG. 2, the game board (C) is stored and arranged with a gap 6 between the launch rail 3 and the guide rail 4 of the game board (C). The game ball fired by the hitting hammer (F) is guided from the firing rail 3 to the guide rail 4 arranged with a gap 6 (space) therebetween, and can be guided to the game area 8. A prize device (not shown) is provided in the game area, and when the prize device is won, a predetermined number of prize balls are paid out to the player, and game balls that do not win flow out of the pachinko machine through the out port D '.

The hitting device reciprocates the hitting hammer (F) 100 times per minute through a driving mechanism (not shown) by an electric driving source such as a motor or a solenoid (not shown) based on the operation of the operation handle 11. By moving, one game ball is fired every 0.6 seconds. Also, A '
Is a through hole provided in the mounting portion (O) for connecting the communication gutter (B ') extending from the upper plate (K) to the prize ball discharge gutter provided on the back surface of the mounting portion (O). C 'is a safe ball gutter for receiving a winning ball that has won a game board.

The guide rail 4 is provided in a substantially circular spiral shape, and forms the game area 8 inside. The guide rail 4 is doubled on the left side of FIGS. 2 and 3 of the game board C. Regarding the overlapped portion, hereinafter, for convenience, the inner guide rail 4 is referred to as an inner guide rail 4b, and the outer guide rail 4 is referred to as an outer guide rail 4a. The gap 6 is formed between the base end of the outer guide rail 4 a and the tip end of the firing rail 3. One end of the foul ball passage 5 opens into the gap 6, and the other end communicates with the lower plate (R). Then, game balls 7 (foul balls or return balls) entering from the gap 6 are sent to the lower plate (R) through the foul ball passage 5. Note that the game area 8 becomes a game area from a place where a shot game ball has passed through an opening (discharge port 30 described later) between the tip of the inner guide rail 4b and the outer guide rail 4a.

At the firing position, the game ball sent from the ball supply device (L) is moved to the ball receiving member (W) at the firing position (P).
As shown in FIG. 4, the firing rail 3 has an upper surface portion for stopping the game ball struck by the ball hammer (F) in a stable state. V-grooves 12 are formed in the grooves. The distal end of the firing rail 3 is a lower surface side portion (a distal lower surface side portion) 3a.
Extend with respect to the upper surface side portion 3b, and have a stepped shape. A thin piece made of stainless steel or a synthetic resin [PET (polyethylene terephthalate) film] (for example, a size of 0.08 mm to 0.3
A mounting groove 14 for inserting and fixing the back-up preventing member 13 (elastic piece) made of an elastic material (about mm) is formed.

The back-up prevention member 13 includes a prevention piece base 15 bent to be substantially U-shaped, and a prevention piece main body 16 connected to the prevention piece base 15 at an angle larger than 90 °. Approximately. Protection piece base 15
Is inserted into the mounting groove 14, and the reverse prevention member 13 is securely held in the mounting groove 14 by the restoring force of the bent prevention piece base 15. Further, as shown in FIG. 5, locking portions (Y) and (E ′) are formed on the prevention piece base 15 to prevent it from coming off upward or downward.

The prevention piece main body 16 has a tip end near the base end of the outer guide rail 4a as shown by a dotted line in FIG. 3 and a solid line in FIG. And the outer guide rail 4a
The game balls can smoothly move on the outer guide rails 4a (guide rails) because they are arranged so as to be continuous upward. Further, the prevention piece main body 16 is formed such that the upper surface side is formed in a flat surface shape, and the distal end side is the base end (the prevention piece base 1).
5 (joining portion with 5). Then, when no external force acts, the prevention piece main body 1 of the reverse movement prevention member 13 attached to the attachment groove 14 is provided.
6, the inner guide rail 4b, as shown in FIG.
Is in contact with In a state where the tip of the prevention piece main body 16 is in contact with the inner guide rail 4b, a space for passing the game ball 7 is secured between the prevention piece main body 16 and the outer guide rail 4a, and the gap 6 is opened. The return ball is guided to the foul ball passage 5 through the gap 6.

The prevention piece body 16 of the reverse movement prevention member 13
Is pushed by the game ball 7 passing through the upper surface portion, and the tip portion overlaps the base end side of the outer guide rail 4a. At this time, the elastic force is reduced by the tip portion of the prevention piece main body 16 as shown in FIG. As indicated by the dotted line, the game ball hit by the ball hammer (F) is set to the minimum necessary force required to contact the outer guide rail 4a with a hitting force exceeding at least the foul ball path (S). Thus, when the game ball 7 is received on the upper surface, it is easily bent.

The opening between the tip of the inner guide rail 4b and the outer guide rail 4a is provided with a discharge port 30 for the game area 8.
The discharge port 30 is provided with a ball return preventing piece 17 for preventing the game ball 7 from returning from the game area 8 to the outer guide rail 4a side (referred to as a return ball).
If only the return to the firing rail side is to be prevented, only the reverse movement preventing member 13 is sufficient, and the ball return preventing piece 17 can be omitted.

In the back-up prevention device 2 of the pachinko machine configured as described above, the game ball 7 is fired by the hitting hammer (F) and reaches the mounting portion of the prevention piece main body 16 so that the game ball 7 is provided. It moves forward while pushing down the prevention piece main body 16 by the elastic force. At this time, the reverse movement preventing member 13 is set so as to exhibit the minimum necessary elastic force as described above, and absorbs the reaction force due to the collision while moving the game ball toward the distal end side of the preventing piece main body 16. Since the prevention piece main body 16 is gradually bent and overlaps the outer guide rail 4a, and the game ball moves from the prevention piece main body 16 to the outer guide rail 4a, the resilience (forward force) of the game ball 7 is rapidly changed. Without this, the game ball 7 is smoothly sent to the outer guide rail 4a side.

When the game ball 7 passes through the prevention piece main body 16,
The prevention piece main body 16 rises by its elastic force, and secures a space between the prevention piece main body 16 and the outer guide rail 4a to allow the game ball 7 to pass therethrough.

Further, in the first embodiment, in order to further stabilize the position of the flying ball to the game area, the prevention piece main body 16 is provided.
However, when it rises due to the elastic force, the back-up preventing member 13
As shown in FIG. 3, the distal end portion of the prevention piece main body 16 comes into contact with the inner guide rail 4b, so that the prevention piece main body 16 receives from the inner guide rail 4b by contact with the inner guide rail 4b. The reaction force is absorbed by the deformation of the prevention piece main body 16. Therefore, when the prevention piece main body 16 abuts on the inner guide rail 4b, the prevention piece main body 16 is quickly maintained in an abutting state without vibration. As described above, the prevention piece main body 16 is kept in contact with the inner guide rail 4b without vibrating, so that the operation handle 11
Even if the game ball 7 is sent to the prevention piece main body 16 by the operation of, the vibration does not affect the resilience applied to the game ball 7 at all, so that the ball 7 hits the inner guide rail 4b. The flying ball position in the game area 8 can be set to a certain position according to the operation of the operation handle 11 as compared with the case where the ball does not touch. Note that the tip of the prevention piece main body 16 is connected to the inner guide rail 4.
b, but it is not necessary to stick to the inner guide rail 4b as long as the foul ball returns to the foul ball passage 5 instead of the inner guide rail 4b.

Although the game ball 7 has moved from the firing rail 3 to the outer guide rail 4a, it has not reached the tip of the outer guide rail 4a (the outlet 30 for the game area 8) and has not been sent to the game area 8. In this case, the game ball 7 travels backward on the outer guide rail 4 a as a foul ball, and is guided to the lower plate (R) through the gap 6 and the foul ball passage 5.

Further, in the prior art described in Japanese Utility Model Publication No. 30-4423, a weight is attached to the on-off valve, so that the number of parts increases and a large space is required in consideration of the rotation of the weight. However, in the present embodiment,
The weight required by the prior art disclosed in the above publication is not required, and the number of parts is reduced, and a large space for providing the weight is not required, so that the size can be reduced. Further, since the number of parts is reduced, the number of assembling steps is reduced, and productivity can be improved.

Next, a second embodiment of the present invention in which a backstop member 13 'is provided on a game board C will be described with reference to FIGS. The same members and portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

As shown in FIGS. 7 and 8, a reverse movement prevention device 2 for a pachinko machine according to the second embodiment has a rectangular shape made of a synthetic resin on a lower portion of a tip end of a firing rail 3 of a game board C. A mounting base 20 is provided. In a portion corresponding to the lower part of the foul ball passage 5 in the game board C, a back guide port 21 for guiding the game ball 7 is formed on the back side of the game board C, and the game ball 7 (foul) is passed through the back guide port 21. Ball or return ball) is guided to an upper plate or a lower plate via a guide path (not shown).

The mounting base 20 has a mounting hole 22 formed therein, and is mounted on the game board C by means of a nail or a screw (not shown) in the mounting hole 22. The mounting table 20 has the first
One end 24 of the prevention piece main body 23 of the retrograde prevention member 13 'provided in place of the retrograde prevention member 13 of the embodiment is insert-molded.

The back-up preventing member 13 'has a flat plate shape on the upper surface side, and one end of the preventing piece main body 23 is held by the mounting base 20 as described above. The reverse movement preventing member 13 ′ has a length such that the other end (the distal end) overlaps the base end side of the outer guide rail 4 a in a state of being held by the mount 20 as described above. In addition, the backstop member 1
3 'has a flat upper surface as described above, and when no external force is applied, its tip is in contact with the inner guide rail 4b as shown in FIG. ing. In a state where the other end (front end) of the retrograde prevention member 13 'is in contact with the inner guide rail 4b, a space for allowing the game ball 7 to pass is secured between the retrograde prevention member 13' and the outer guide rail 4a. Then, the gap 6 is opened, and the return ball is guided to the foul ball passage 5 through the gap 6.

The back-up preventing member 13 'is pushed by the game ball 7 passing on the upper surface side so that the front end portion overlaps the base end side of the outer guide rail 4a, but the elastic force at that time is prevented. As shown in FIG. 7, the tip of the one main body 23 is set to a minimum necessary force required to stand up so as to abut on the inner guide rail 4b, and when the game ball 7 is received on the upper surface, It is designed to bend easily.

In the second embodiment constructed as described above, similarly to the first embodiment, when the game ball 7 is fired by the operation handle 11 and reaches one end of the preventing piece main body 23, the game ball is fired. 7 moves forward while pushing down the prevention piece main body 23 by the applied elastic force. At this time, the back-up preventing member 13 'is set so as to exhibit the minimum necessary elastic force as described above, so that the resilient force (advancing force) of the game ball 7 does not suddenly change, and The other end (tip) of the main body 23 overlaps the outer guide rail 4a, and the game ball 7 is smoothly sent to the outer guide rail 4a side.

When the game ball 7 passes through the back-stopping member 13 ', the back-stopping member 13' is raised by its elastic force, and a space for passing the game ball 7 is provided between the prevention piece main body 23 and the outer guide rail 4a. Secure.

Further, in the present embodiment, in order to further stabilize the position of the flying ball to the game area, a reverse movement preventing member 13 'is provided.
However, when it rises due to the elastic force, the back-up preventing member 13
As shown in FIG. 7, the distal end portion of the prevention piece main body 23 'comes into contact with the inner guide rail 4b, so that the prevention piece main body 23 is separated from the inner guide rail 4b by contact with the inner guide rail 4b. The received reaction force is absorbed by the prevention piece main body 23 being bent and deformed. For this reason, when the prevention piece main body 23 abuts on the inner guide rail 4b, the prevention piece main body 23 is quickly maintained in an abutting state without vibration. As described above, the prevention piece main body 23 is kept in contact with the inner guide rail 4b without vibrating.
Even if the game ball 7 is sent to the reverse movement prevention member 13 'by the operation of 1, the above-mentioned vibration does not affect the resilience provided to the game ball 7 at all. The flying ball position in the game area 8 can be set to a certain position in accordance with the operation of the operation handle 11 as compared with the case where the ball does not contact the ball.

When the game ball 7 moves from the firing rail 3 to the outer guide rail 4a, but is not sent to the game area 8 without reaching the tip of the outer guide rail 4a (a discharge port for the game area 8). , The game ball 7 is the outer guidance rail 4
a, and is guided to the upper plate or the lower plate through the gap 6 and the foul ball passage 5.

Further, in the present embodiment, the prevention piece main body 2
3 is made of a member having elasticity, the reaction force to the fired game ball is reduced, and the prevention piece main body 2 is formed.
3 has a length such that the front end side overlaps with the outer guide rail 4a, so that it is reliably guided from the firing rail 3 to the outer guide rail 4a. Furthermore, the weight required in the prior art disclosed in Japanese Utility Model Publication No. 30-4423 is not required, and the number of parts is reduced, and a large space for providing the weight is not required. Can be achieved. Further, since the number of parts is reduced, the number of assembling steps is reduced, and productivity can be improved.

In the second embodiment, the reverse movement preventing member 1
3 'is held on the mounting base 20 attached to the game board C, and the holding state of the reverse movement preventing member 13' becomes more stable. Further, instead of the ball return preventing piece 17, a reverse movement preventing member 13 'may also be used.

In the first and second embodiments, the prevention piece body 13 or 23 has a constant thickness from the base end to the tip end. You may comprise so that it may become. With such a configuration, when the upper surface side of the prevention piece main bodies 13 and 23 is curved in a concave shape, the game ball is placed in the prevention piece main body 1.
Since it gradually bends as it advances to the tip side of 3, 23, the transition of the game ball 7 to the outer guide rail 4a can be performed more smoothly.

In order to smoothly transfer the game ball 7 to the outer guide rail 4a, a portion of the outer guide rail 4a that overlaps with the preventive piece main body 10 (first embodiment) has a thickness of the preventive piece main body 10. The outer guide rail 4a and the upper surface portion of the prevention piece main body 16 when the prevention piece main body 16 overlaps may be set to be flush with the lower piece. The same can be said for the retrograde prevention member 13 ′ (second embodiment). The outer guide rail 4 a and the retrograde prevention member 13 ′ when the retrograde prevention member 13 ′ overlaps.
May be flush with each other.

In the first and second embodiments, the upper surface side of the firing rail 3 is straight, but may be slightly concavely curved. In addition, although the main body of the anti-backup members 13 and 13 'is flattened, but the upper surface side of the firing rail is curved in a slightly concave state, the main body 16 and 23 are bent in a concave state to guide the outside. You may make it follow the rail 4a.

[0048]

According to the first aspect of the present invention, the elastic piece is gradually bent by receiving the game ball sent from the hitting device upward by raising the front end side of the elastic piece in advance. By doing so, the impact force of the launched game ball is reduced, the space is bridged so as to overlap the outer guide rail, the game ball is smoothly guided to the guide rail, and the flying ball position in the game area is hit It can be located at a certain location according to the operation of the device. After the game ball has passed, it rises by the elastic force, waits for the next shot ball, and guides the return ball to the space. In addition, compared to the prior art in which a weight is attached, the weight is not required, the number of parts is reduced, and a large space due to the provision of the weight is not required.
It is possible to reduce the size, reduce the number of assembly steps, and improve productivity.

According to the second aspect of the present invention, the base end of the elastic piece is held on the firing rail, and the elastic piece can be held without increasing the number of parts. According to the third aspect of the present invention, the base end of the elastic piece is held on the mounting base, and the elastic piece can be stably mounted. According to the invention as set forth in claim 4, at the time of rising, the elastic piece has elasticity even if it comes into contact with another member, so that it absorbs a reaction force accompanying the contact and does not vibrate quickly without being vibrated. The contact state is maintained. When the elastic piece is waiting for the next launch ball, it does not vibrate, so it does not greatly change the resilience provided to the game ball and smoothly guides the game ball to the guide rail. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a machine frame of a pachinko machine without a game board according to a first embodiment of the present invention.

FIG. 2 is a perspective view schematically showing a pachinko machine equipped with a game board according to the first embodiment of the present invention.

FIG. 3 is a front view schematically showing the reverse movement preventing member of FIG. 2;

FIG. 4 is an exploded perspective view showing the reverse movement preventing member of FIG. 2;

FIG. 5 is a cross-sectional view showing a mounting state of a firing rail of the back-up preventing member of FIG. 2;

FIG. 6 is a view schematically showing a state in which the reverse movement preventing member in FIG. 4 is bent.

FIG. 7 is a front view schematically showing a game board provided with a back-up prevention device for a pachinko machine according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a reverse movement preventing member of the pachinko machine shown in FIG. 7;

FIG. 9 is a view showing an example of a conventional pachinko machine.

[Explanation of symbols]

 2 Retrograde prevention device 3 Launch rail 4a Outer guide rail 6 Crevice (space) 13, 13 'Retrograde prevention member 16 Prevention piece main body (elastic piece)

Claims (4)

[Claims] 1. A launch rail for guiding a game ball fired by a hitting device, a guide rail for guiding a game ball from the launch rail to a game area, and formed between the launch rail and the guide rail. A space portion, and an elastic piece holding a base end portion on the firing rail side, the elastic piece having a length reaching the guide rail by bridging the space portion and guiding the distal end side to the guide rail. A back-up prevention device for a pachinko machine, which is provided upwardly separated from an upper surface of a rail. 2. The back-up prevention device for a pachinko machine according to claim 1, wherein a base end of the elastic piece is held on a firing rail. 3. The apparatus of claim 1, wherein a base end of the elastic piece is held by a mount provided near an end of the firing rail. 4. The elastic piece according to claim 1, wherein the tip of the elastic piece is in contact with another member when the game ball does not act. Reverse movement prevention device for pachinko machines.