JP5917960B2 - Pachinko machine - Google Patents

Description

  The present invention relates to a pachinko machine that uses a game ball to play a game.

  In general, a pachinko machine has a game board covered by a front door having a transparent glass plate, and a game ball is launched from a launcher toward a game area formed on the front surface (board face) of the game board. It is supposed to be. The game board is provided with an outer rail that guides a game ball launched from the launching device to the upper side of the game area, and an inner rail that defines most of the peripheral wall of the game area. The space between the rails is the launch guide passage. A ball return prevention member is provided in the vicinity of the exit of the launch guide passage, and the ball return prevention member prevents the backflow of the game ball to the launch guide passage side.

  As this kind of ball return prevention member, a tongue piece made of a thin elastic metal plate is attached in cantilever to the tip of the inner rail located at the exit of the firing guide passage, and the distance between the free end of the tongue piece and the outer rail What is set smaller than the diameter of the game ball is widely used. According to the ball return prevention member using such a tongue piece, the game ball launched from the launching device elastically deforms the tongue piece and enters the game area, but the game ball launched into the game area is placed on the tongue piece. Since the backflow to the launch guide passage side due to the collision is prevented, it is possible to prevent the game ball launched into the game area from hitting the game nail or the windmill and returning to the launch guide passage side. However, the elastic deformation of the tongue piece permits the passage of the game ball, so the tongue piece repeats elastic deformation several times with long-term use, or the game ball returned from the game area is When it frequently collides with the piece, the elasticity of the tongue piece may be extremely lowered, and the function of preventing the return of the ball may not be exhibited.

  Therefore, conventionally, the ball return prevention member is made of a synthetic resin molded product, and the ball return prevention member made of synthetic resin is pivotally supported near the exit of the firing guide passage so that the ball return prevention member becomes a pendulum. A pachinko machine that is rotated as described above to prevent the return of the game ball has been proposed (see, for example, Patent Document 1). In this conventional example, a recess is provided in a synthetic resin base member disposed at the tip of the inner rail, and the ball return preventing member is pivotally supported in the recess. The recess of the base member opens on the upper surface side facing the firing guide passage. A first restricting portion is formed on the upper end side wall surface of the recess, and a rib-like second restricting portion is formed on the inner bottom surface of the recess. The part is formed. In addition, the ball return prevention member is integrally formed with an opening / closing valve and a weight portion protruding in opposite directions with respect to the center axis of rotation, and this opening / closing valve protrudes from the recess toward the exit of the discharge guide passage, The part is rotatable in the recess.

  In a pachinko machine equipped with such a resin ball return prevention member, normally, the ball return prevention member is stopped in a posture in which the on-off valve faces the outlet of the firing guide passage, and the weight portion of the base member The ball return preventing member is pivotally restricted to the initial position by contacting the second restricting portion. In this state, when the game ball is launched from the launcher toward the game area, the game ball moves up the launch guide path along the outer rail and contacts the on-off valve, and then pushes the on-off valve with the contact force. Enter the game area. At that time, the ball return prevention member rotates in a direction to open the exit of the firing guide passage, but if the on-off valve collides with the first restricting portion on the upper end side wall surface of the recess, further rotation is restricted. Since the maximum opening angle is obtained, the ball return prevention member receives the urging force of the weight portion and instantaneously rotates and returns in the reverse direction to close the exit of the firing guide passage. When the weight portion collides with the second restricting portion at the initial position and the rotation is restricted, the ball return prevention member again stops in a posture in which the on-off valve faces the exit of the firing guide passage. The return movement of the game ball toward the firing guide passage is blocked by the on-off valve.

Japanese Patent No. 4578504

  As described above, in the conventional pachinko machine disclosed in Patent Document 1, the ball return preventing member of the resin molded product is pivotally supported on the resin base member and formed in the recess of the base member. Since the first restricting portion and the second restricting portion define the rotation range of the ball return prevention member, the ball return prevention member that rotates like a pendulum can prevent backflow of the game ball. At the same time, the backflow prevention function of the game ball can be maintained for a long time. However, when the ball return prevention member rotated to the maximum opening angle receives the biasing force of the weight part and returns to the initial position, the weight part is formed on the rib-like second restriction part formed on the inner bottom surface of the recess. Since it stops by abutting, it is necessary to ensure the mechanical strength by forming the inner bottom surface of the recess where the second restricting portion protrudes relatively thick. As a result, there is a problem that a part of the base member protrudes toward the game area by an amount corresponding to the thickness of the inner bottom surface of the recess, and the exclusive space of the game area is reduced by the protrusion amount. In particular, when the variable display unit disposed in the center of the game area is enlarged, the game area near the exit of the launch guide passage is greatly narrowed due to the presence of the variable display unit. It is important to reduce the amount of protrusion of the base member toward the game area as much as possible.

  The present invention has been made in view of the situation of the prior art as described above, and an object thereof is to provide a pachinko machine capable of maintaining a backflow prevention function of a game ball over a long period while saving space. There is to do.

In order to achieve the above object, the present invention includes a launching means for launching a game ball, a launch guide passage for guiding the game ball fired by the launch means to a game area, and an exit of the launch guide passage. A ball return prevention member pivotally supported by an existing base member, and allowing the ball to flow into the game area by rotating the ball return prevention member in a direction to open the outlet. In addition, in the pachinko machine in which the return of the game ball to the launch guide passage is prevented by the rotation return of the ball return prevention member in the direction of closing the outlet, the base member is configured to return the ball return. A recess for accommodating the prevention member, a stopper wall provided at the upper opening end of the recess, and a guide groove provided in a side wall of the recess. Open and close the exit of the launch guide passage And closed, and a weight portion for biasing the on-off valve in the closing direction, which has a shaft portion located between the shutoff valve and the weight portion, which is inserted into the guide groove on a side surface of the weight portion engaged When the ball return prevention member rotates in the opening direction around the shaft portion , the on-off valve is brought into contact with the stopper wall to thereby prevent the ball return prevention member from A maximum opening angle is defined, and when the ball return prevention member rotates in the closing direction around the shaft portion, the engagement pin is brought into contact with one end portion of the guide groove, The ball return preventing member is stopped at the initial position.

  In the pachinko machine configured as described above, normally, the weight portion of the ball return preventing member is held at the initial position in the recess of the base member, and the engaging pin protruding from the side surface of the weight portion has the side wall of the recess. The ball return prevention member is stopped in a posture in which the on-off valve faces the outlet of the firing guide passage. In this state, when a game ball is launched from the launcher toward the game area, the game ball ascends the launch guide passage and contacts the on-off valve, and then pushes the on-off valve with the contact force and enters the game area. To do. As a result, the ball return preventing member rotates in a direction to open the exit of the firing guide passage, and when the on-off valve collides with a stopper wall provided at the upper opening end of the recess, further rotation is restricted. For this reason, the ball return preventing member receives the urging force of the weight portion and instantaneously returns in the reverse direction. During this time, the engagement pin moves in the guide groove with the rotation of the ball return prevention member, and the return direction is restricted when the engagement pin comes into contact with one end of the guide groove. The return preventing member stops again in a posture in which the opening / closing valve faces the exit of the firing guide passage, and the returning operation of the game ball from the game area toward the firing guide passage is prevented by the opening / closing valve.

  Here, when the ball return prevention member rotates in the opening direction under the contact force of the game ball launched from the launching device, the on-off valve collides with the stopper wall with a large impact force. Since the impact force is dispersed by providing at the upper opening end of the recess, the ball return preventing member can be prevented from being damaged and the durability can be enhanced. On the other hand, since the impact force when the ball return preventing member returns to the initial position by the urging force of the weight portion is small, if the engaging pin protruding from the side surface of the weight portion is brought into contact with one end portion of the guide groove, The return preventing member can be reliably stopped at the initial position. And by providing such a guide groove on the side wall of the recess, there is no need to provide a protrusion for regulating the weight on the inner bottom surface of the recess, so the thickness of the inner bottom surface of the recess is reduced and the base member The amount of protrusion to the game area side can be suppressed, and the effective space of the game area can be expanded accordingly.

  In the above configuration, the base member includes a main body case and a cover, and the main body case is formed with a notch that opens one side of the recess, and the cover is formed so as to close the notch. It is attached to the main body case, and if the ball return prevention member is pivotally supported by these main body case and cover, the guide groove and notch formed in the main body case will not be undercut, The main body case can be molded using a simple mold structure, and the ball return preventing member can be securely supported between the main body case and the cover.

  The pachinko machine of the present invention pivotally supports a ball return prevention member having an opening / closing valve and a weight portion in a recess of the base member, and the ball return prevention member is contacted with a game ball launched from the launching device. The opening / closing valve collides with the stopper wall at the upper opening end of the recess to regulate the maximum opening angle of the ball return prevention member. Since the impact force at the time of collision is dispersed, damage to the ball return preventing member can be prevented and durability can be enhanced. Also, when the on-off valve collides with the stopper wall and reaches the maximum opening angle, the ball return prevention member receives the urging force of the weight portion and instantaneously returns in the reverse direction, but in this case the impact force is small Since the engagement pin projecting on the side surface of the weight portion is brought into contact with one end portion of the guide groove provided on the side wall of the recess, the ball return prevention member is stopped at the initial position. There is no need to provide a regulating protrusion for the weight portion on the inner bottom surface of the recess. As a result, the thickness of the inner bottom surface of the recess can be reduced to suppress the amount of protrusion of the base member toward the game area, and the effective space of the game area can be expanded accordingly.

1 is an external perspective view of a pachinko machine according to an embodiment of the present invention. It is an external appearance perspective view of the state which opened the front door of this pachinko machine. It is a rear view of this pachinko machine. It is a front view which shows the principal part of the game board with which this pachinko machine is equipped. It is a perspective view of the control rail provided in the game board shown in FIG. It is a perspective view of the ball return prevention mechanism provided in the upper end of the control rail shown in FIG. It is the perspective view which looked at the ball return prevention mechanism of FIG. 6 from another direction. It is a disassembled perspective view of this ball return prevention mechanism. It is explanatory drawing which shows the state which has this ball | bowl return prevention mechanism in an initial position. It is operation | movement explanatory drawing of this ball | bowl return prevention mechanism.

  DESCRIPTION OF EMBODIMENTS Embodiments of the invention will be described with reference to the drawings. As shown in FIG. 1, a pachinko machine P according to this embodiment is a vertical rectangular machine frame 1 installed in an island facility of a game hall, A main body frame 2 is attached to the machine frame 1 so as to be openable and closable, and a front door 3 is attached to the front surface of the main body frame 2 so as to be openable and closable. The front door 3 is made of glass or plastic. A transparent plate 4 made of or the like is attached.

  As shown in FIG. 2, an upper bearing body 5a and a lower bearing body 5b are fixed to the left frame portion of the machine casing 1, and a large speaker is provided at the lower left corner below the lower bearing body 5b. 6 is disposed. On the other hand, first pins (not shown) are provided at both upper and lower ends of the left frame portion of the main body frame 2, and these first pins are pivotally supported by the corresponding upper and lower bearing bodies 5a and 5b. The main body frame 2 is openable and closable with respect to the machine frame 1.

  A game board 7 is accommodated inside the upper part of the main body frame 2, and the board surface (front surface) of the game board 7 is visible through the transparent plate 4. The game board 7 has a game area 8 on the board surface, and the game area 8 is visible from the outside through the transparent plate 4 of the front door 3. The game area 8 is partitioned and formed in a substantially circular shape by the guide rail 9 and the regulation rail 10, and a game ball launched from a launching device 23 described later flows down in the game area 8. Further, in the game area 8, a variable display unit 24 having a display device 24a, a pair of start winning ports 25, 26, a plurality of general winning ports 27, a through chucker 28 as a passing gate, and a big winning port. Although not shown in the figure, there are provided detection sensors for detecting the passage of game balls inside the start winning ports 25, 26, the general winning port 27, and the big winning port. It has been.

  Briefly describing each of the above-mentioned members provided in the game area 8, a stage 30 is provided below the variable display unit 24, and the pair of start winning ports 25 and 26 are vertically moved to a position directly below the stage 30. Arranged in two layers in a stacked state. The upper start winning opening 25 is a non-actuated winning opening having no movable piece, while the lower start winning opening 26 is an actuating (electric tulip structure) winning opening having a pair of movable pieces. Yes. When a game ball enters one of the start winning openings 25 and 26, an electronic lottery for special symbol display is performed in response to the game ball, and the change display and stop of the effect symbol on the display screen of the display device 24a are performed. Display is performed. In addition, when a game ball passes through the through chucker 28, an electronic lottery with a normal symbol display is performed, and when the lottery result is a win, the movable piece of the start winning opening 26 is temporarily opened to play the game ball. It is designed to allow entry.

  The attacker device 29 is a device that is activated when the player wins and shifts to the jackpot gaming state as a result of an electronic lottery of special symbol display performed when a game ball enters the start winning holes 25 and 26. Specifically, when the lottery result of the special symbol display is a win, the change stop of the effect symbol on the display screen of the display device 24a of the variable display unit 24 is stopped at the special symbol such as “777”, for example. The attacker device 29 is repeatedly opened a plurality of times to expose the internal big prize opening. The attacker device 29 maintains the open state until, for example, 30 seconds elapses for one opening operation or until 10 game balls enter the big winning opening, and after repeating the opening operation, for example, 15 times, the jackpot ends. . When game balls enter the start winning holes 25 and 26, a special symbol display lottery result is performed and a predetermined number of game balls are paid out to the player as prize balls. When entering, only a predetermined number of game balls are paid out. The game balls that have not entered any of the start winning ports 25 and 26 or the general winning port 27 are discharged from the out port 31 provided at the lowermost end of the game area 8 to the back side of the game board 7. It has become.

  The main body frame 2 located below the game board 7 is an installation part 2a covered by the lower part of the front door 3, and a game ball is launched toward the game area 8 in the lower center of the installation part 2a. A launching device 23 is disposed. The launcher 23 has a hammer 23a for hitting a game ball, and the hammer 23a is rotated (oscillated) using a rotary solenoid or the like as a drive source. Further, a locking device 11 having a cylinder lock 11 a is installed on the right side frame portion of the main body frame 2, which is not shown, but this locking device 11 includes a rear locking rod disposed on the back surface of the main body frame 2. A front locking rod disposed on the front surface of the main body frame 2 is provided. Normally, the main body frame 2 is locked to the machine frame 1 by the rear locking bar of the locking device 11, and the front door 3 is locked to the main body frame 2 by the front locking bar. Then, when a key (not shown) is inserted into the key hole of the cylinder lock 11a and the key is rotated in one direction (for example, clockwise), the rear locking rod is moved downward to unlock the main body frame 2. Yes. Further, when the key inserted into the key hole of the cylinder lock 11a is rotated in the other direction (counterclockwise), the front locking bar moves upward and the front door 3 is unlocked.

  Second pins (not shown) are provided at both upper and lower ends of the left side frame portion of the front door 3, and these two second pins are inserted into upper and lower shaft holes (not shown) of the main body frame 2. The front door 3 can be opened and closed with respect to the main body frame 2. Returning to FIG. 1, the front door 3 has a large opening 3 a facing the board surface of the game board 7, and the opening 3 a is closed by the transparent plate 4. A relatively small speaker 12 is disposed on the left and right of the upper part of the front door 3, and the speaker 12 and the large speaker 6 described above generate various sound effects relating to the game. . Further, at the lower part of the front door 3, the upper tray 13 for receiving game balls paid out from a prize ball dispensing device (described later) disposed on the back surface of the game board 7 and the upper tray 13 are discharged from the upper tray 13. A lower tray 14 for storing game balls and a push button 15 that can be pressed by the player are provided. An operation handle 16 for adjusting the firing strength of the launching device 23 is provided on the right side of the upper tray 12. Is arranged.

  As shown in FIG. 3, on the back side of the pachinko machine P, there are a main control processing unit 17 that performs main processing relating to the game, and various devices such as a display device and a speaker in response to a command from the main control processing unit 17. A sub-control processing unit 18 that controls the game, a prize ball paying device 19 that pays out a predetermined number of game balls as prize balls to the upper tray 13, and a prize ball paying device 19 in response to a command from the main control processing unit 17 The payout control processing unit 20 for controlling the operation, the firing control processing unit 21 for controlling the operation of the launching device 23 according to the amount of rotation operation of the operation handle 16, and various information such as the number of winning balls and the number of jackpots, An external terminal board 22 for outputting to the hall computer is provided. The main control processing unit 17 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores a predetermined control program, and a RAM (Temporary storage of generated processing information and a RAM that deletes the stored information ( And a control board (main board) on which a random access memory (Random Access Memory) and the like are mounted. When the CPU reads and executes various programs and data stored in the ROM, main processing relating to the game is performed.

  As shown in FIG. 4, on the left side of the game area 8 of the game board 7, an outer rail 32 that guides the game ball launched from the launch device 23 to the upper side of the game area 8, and the outer peripheral surface of the regulation rail 10 An inner rail 33 extending along the inner rail 33 is provided, and a space portion sandwiched between the outer rail 32 and the inner rail 33 is a launch guide passage 34. In FIG. 4, the variable display unit 24 (display device 24a) and the start winning ports 25 and 26 provided in the game area 8 are not shown. The outer rail 32 is arranged in an arc shape from the left position away from the out port 31 through the left end and upper end portion of the game board 7, and the upper end side of the outer rail 32 is continuous with the guide rail 9. The inner rail 33 is arranged in an arc shape from a position slightly on the left side of the outlet 31 to the upper end portion of the game board 7, and a ball return that prevents the game ball from returning from the game area 8 to the upper end portion of the firing guide passage 34. A prevention mechanism 35 is provided.

  Returning to FIG. 2, a launch rail 36 is provided in the installation portion 2 a below the game board 7, and the launch rail 36 is inclined with an upward slope toward the launch guide passage 34. On the other hand, a rectifier 37 communicating with the upper tray 13 is protruded on the rear surface side of the front door 3, and in the state where the front door 3 is locked to the main body frame 2, a supply port 37 a that is an outlet of the rectifier 37. Is positioned at the lowermost right end of the firing rail 36. Thereby, the game balls stored in the upper tray 13 are supplied one by one from the supply port 37a to the firing rail 36 while being rectified by the rectifier 37, and the game balls held on the firing rail 36 are supplied to the launching device 23. It is fired in the direction of the firing guide passage 34 by hitting the hammer 23a. In addition, a lower part of the space from the launch rail 36 to the launch guide passage 34 is a foul ball collection path 38, and in a state where the front door 3 is locked to the main body frame 2, A ball collection portion 14a protruding to the back side is positioned at the lowermost part of the foul ball collection path 38.

  Next, the above-described ball return prevention mechanism 35 will be described in detail with reference to FIGS. The ball return prevention mechanism 35 is supported by a main body case 39 integrally formed at the upper end of the regulation rail 10, a cover 40 integrated with the main body case 39, and a main body case 39 and the cover 40 so as to be rotatable. The main body case 39, the cover 40, and the ball return prevention member 41 are all molded products made of a synthetic resin material. 9 (a) and 10 (a) are explanatory views of the ball return prevention mechanism 35 as seen from the front side of the game board 7, and FIGS. 9 (b) and 10 (b) show the ball return prevention mechanism 35. It is explanatory drawing seen from the back surface side of the game board.

  The main body case 39 rises from one end portion in the width direction of the bottom plate portion 39a along the board surface of the game board 7 and swells from the regulation rail 10 to the game area 8 side continuously with substantially the same width. A space surrounded by the bottom plate portion 39a and the side plate portion 39b is a cutout portion S1. That is, the body case 39 is formed with a notch S1 that opens the front side facing the transparent plate 4 and the top side facing the firing guide passage 34, and the upper opening end of the notch S1 is a stopper. It is a wall 39c. The stopper wall 39c is a wall surface that crosses the upper end portion of the bottom plate portion 39a in the width direction. As shown in FIG. 8, the mechanical strength of the stopper wall 39c is increased by forming the upper end portion of the bottom plate portion 39a into a cylindrical shape. Has been increased.

  A bearing portion 39d and a guide groove 39e are formed in the side plate portion 39b of the main body case 39, and the guide groove 39e extends in an arc shape along a virtual circle centering on the bearing portion 39d. Further, a projection 39f is formed on the back surface of the side plate portion 39b, and a similar projection is also formed on the back surface of the regulation rail 10 (not shown). Then, by inserting these protrusions 39f into positioning holes (not shown) of the game board 7, the main body case 39 and the regulation rail 10 are attached to predetermined positions of the game board 7. As described above, the notch portion S1 is a space where the front side of the side plate portion 39b is opened, and the bearing portion 39d and the guide groove 39e are formed in the side plate portion 39b. The entire shape including the guide groove 39e and the like is not an undercut shape, and the main body case 39 (and the regulation rail 10) can be formed using a simple mold structure.

  The cover 40 is a plate-like body having a mounting hole 40a and a positioning hole 40b, and a bearing portion 40c is formed on the inner surface thereof (see FIG. 8). The cover 40 has a notch S1 by inserting a positioning hole 40b into a positioning projection 39g projecting from the notch S1, and inserting a screw 42 into the mounting hole 40a and screwing it onto the end surface of the stopper wall 39c. It is fixed to the main body case 39 in a state in which the opening on the front side is closed. The base case 43 is formed by integrating the main body case 39 and the cover 40 as described above. The base member 43 is surrounded by the wall surface (the bottom plate portion 39a and the side plate portion 39b) of the notch S1 and the cover 40. A recessed S is defined.

  The ball return prevention member 41 has a shaft hole 41a, an on-off valve 41b, and a weight portion 41c. The on-off valve 41b and the weight portion 41c protrude in a “U” shape with the shaft hole 41a as a boundary. A support shaft 44 is inserted through the shaft hole 41a, and both ends of the support shaft 44 are engaged with the side plate portion 39b and the bearing portions 39d and 40c of the cover 40, so that the recess 44 of the base member 43 is inserted. A ball return prevention mechanism 35 having a configuration in which the ball return prevention member 41 is pivotally supported is assembled. When assembling the ball return prevention mechanism 35 having such a configuration, the ball return prevention member 41 is disposed in the notch S1 of the main body case 39, and the support shaft 44 inserted through the shaft hole 41a of the ball return prevention member 41 is provided. One end of the shaft 44 is locked to the bearing portion 39d of the side plate portion 39b, and then the cover 40 is put on the front side opening of the notch portion S1, and the other end of the support shaft 44 is locked to the bearing portion 40c of the cover 40. What is necessary is just to fix the cover 40 to the main body case 39 using the screw | thread 42 in the state. If the assembly work of the ball return prevention mechanism 35 is performed on the regulation rail 10 before being attached to the game board 7 and then the regulation rail 10 is attached to the game board 7 together with the ball return prevention mechanism 35, The ball return prevention mechanism 35 can be easily assembled in a wide space. However, it is also possible to assemble the ball return prevention mechanism 35 by incorporating the ball return prevention member 41 and the cover 40 with respect to the main body case 39 attached to the game board 7 together with the regulation rail 10 in advance. The ball return preventing member 41 can be pivotally supported between the main body case 39 and the cover 40 easily and reliably.

  The on-off valve 41b of the ball return preventing member 41 is a rectangular plate-like body, and the weight portion 41c is a thicker weight body than the on-off valve 41b. An engagement pin 41d is projected from one end surface of the weight portion 41c in the width direction, and the engagement pin 41d is inserted into a guide groove 39e formed in the side plate portion 39b of the main body case 39. Further, the other end surface in the width direction of the weight portion 41c is an attachment recess 41e. When the weight of the weight portion 41c is insufficient, a metal (for example, a screw) having a large mass is embedded in the attachment recess 41e. Consideration is given so that the total weight of the weight 41c can be finely adjusted. In a normal state, the ball return preventing member 41 is urged to rotate in one direction around the support shaft 44 by the weight of the weight portion 41c, and this urging force is applied as shown in FIGS. 9 (a) and 9 (b). Since the engaging pin 41d is in contact with one end portion of the guide groove 39e, the ball return preventing member 41 stops at the initial position. When the ball return preventing member 41 is stopped at the initial position as described above, the on-off valve 41b projects in a substantially vertical posture from the upper surface opening of the recess S toward the outlet of the firing guide passage 34, and opens and closes. The tip of the valve 41b faces the outer rail 32 with an interval smaller than the diameter of the game ball B.

  When the game ball B is launched from the launching device 23 toward the game area 8 in this state, the game ball B ascends the launch guide passage 34 as shown in FIGS. 10 (a) and 10 (b). After contacting 41 b, the contact force pushes the on-off valve 41 b and enters the game area 8. As a result, the ball return prevention member 41 rotates in a direction to open the outlet of the firing guide passage 34, and when the on-off valve 41b collides with the stopper wall 39c, the ball return prevention member 41 is restricted from further rotation. To reach the maximum opening angle. Here, the on-off valve 41b receives the contact force from the game ball B and collides with the stopper wall 39c with a large kinetic energy. The impact force at this time provides the stopper wall 39c on the wall surface of the upper opening end of the recess S. Therefore, the on-off valve 41b is prevented from being damaged, and the durability of the ball return preventing member 41 is enhanced. During this time, the engaging pin 41d moves in the guide groove 39e from one end to the other end. However, even if the ball return prevention member 41 reaches the maximum opening angle, the engaging pin 41d remains in the guide groove 39e. Therefore, the engagement pin 41d is not damaged by the impact force of the on-off valve 41b.

  When the on-off valve 41b collides with the stopper wall 39c and reaches the maximum opening angle in this way, the ball return preventing member 41 receives the urging force of the weight portion 41c and moves in the reverse direction (clockwise in FIG. 10B). As a result, the engaging pin 41d moves in the guide groove 39e from the other end portion toward the one end portion. Then, when the engagement pin 41d comes into contact with one end of the guide groove 39e, the rotation in the return direction by the urging force of the weight portion 41c is restricted and returns to the initial position, so that FIGS. 9 (a) and 9 (b) As shown, the ball return prevention member 41 again stops in a posture in which the on-off valve 41b is opposed to the outlet of the firing guide passage 34. Therefore, even if the game ball B launched into the game area 8 collides with a game nail or the like and is bounced back, the game ball B is opened and closed at the outlet of the firing guide passage 34 as shown by the arrow in FIG. It is blocked by 41b. Here, since the ball return preventing member 41 tries to return to the initial position with a small kinetic energy based on the urging force of the weight portion 41c, the impact force when the engagement pin 41d abuts on one end portion of the guide groove 39e is small, There is no possibility that the engaging pin 41d is damaged during the returning operation of the ball return preventing member 41.

  In the pachinko machine P configured as described above, when the player rotates the operation handle 16, the game balls stored in the upper tray 13 are supplied and held one by one from the supply port 37a to the firing rail 36, In synchronism with this, the launching device 23 operates to swing the hammer 23a in the firing direction with a strength corresponding to the amount of operation of the operation handle 16, so that the game ball held on the launch rail 36 is launched by the hammer 23a being hit. Fired sequentially in the direction of the guide passage 34. At that time, the game ball that has not reached the game area 8 due to insufficient momentum at the time of launching travels backward through the launch guide passage 34 and falls into the foul ball collection passage 38, and then collects the ball from the foul ball collection passage 42. The foul ball is returned to the lower tray 14 through the portion 14a.

  On the other hand, as shown in FIGS. 10 (a) and 10 (b), the game ball B having sufficient momentum at the time of launching pushes the opening / closing valve 41b of the ball return prevention member 41 away from the launch guide passage 34 and enters the game area 8. The return prevention member 41 enters and returns to the reverse direction instantly after reaching the maximum opening angle. Even if the game ball B that has passed through the ball return prevention mechanism 35 collides with a game nail or the like in the game area 8 and is bounced back, the outlet of the firing guide passage 34 is rotated back to the initial position, and the on-off valve 41b Therefore, as shown in FIGS. 9A and 9B, the return movement of the game ball B from the game area 8 toward the launch guide passage 34 is blocked by the on-off valve 41b. When the game ball B that has entered the game area 8 in this way enters the start winning opening 25, 26, as described above, a special symbol display electronic lottery is performed and a predetermined number of game balls are awarded. It is paid out to the player as a ball. Further, when the game ball B flowing down in the game area 8 enters the general winning opening 27, only a predetermined number of gaming balls are paid out, and it does not enter any of the starting winning openings 25, 26 or the general winning opening 27. The game ball B is discharged from the out port 31 to the back side of the game board 7.

  As described above, the pachinko machine P according to the present embodiment pivotally supports the ball return preventing member 41 having the on-off valve 41b and the weight portion 41c in the recess S of the base member 43 so as to be rotatable. When the ball return prevention member 41 receives the contact force of the game ball B launched from the launching device 23 and rotates in the opening direction, the on-off valve 41b collides with the stopper wall 39c provided at the upper opening end of the recess S. Since the maximum opening angle of the ball return preventing member 41 is defined, the impact force when the on-off valve 41b collides with the stopper wall 39c is dispersed, and the ball return preventing member 41 is prevented from being damaged and durable. Can be increased. When the on-off valve 41b collides with the stopper wall 39c and reaches the maximum opening angle, the ball return prevention member 41 receives an urging force of the weight portion 41c and instantaneously returns in the reverse direction. Focusing on the fact that the force is small, the engagement pin 41d protruding from the side surface of the weight portion 41c is brought into contact with one end portion of the guide groove 39e formed in the side plate portion 39b of the main body case 39, whereby the ball return prevention member 41 is brought into contact. Is stopped at the initial position, so that it is not necessary to provide a restricting protrusion for the weight portion 41c on the inner bottom surface of the recess S for housing the weight portion 41c. As a result, the thickness of the bottom plate portion 39a that defines the inner bottom surface of the recess S can be reduced and the amount of protrusion of the base member 43 toward the game area 8 can be suppressed, and the effective space of the game area 8 can be reduced accordingly. Can be spread.

  In this embodiment, the base case 43 is constituted by the main body case 39 and the cover 40 that are integrated by using screws or the like, and the main body case 39 is surrounded by the bottom plate portion 39a and the side plate portion 39b. The notch part S1 is formed, and the ball return preventing member 41 is pivotally supported by the side plate part 39b of the main body case 39 and the cover 40 that closes the front open end of the notch part S1. As a result, the guide groove 39e and the cutout portion S1 formed in the main body case 39 do not have an undercut shape. Therefore, the main body case 39 can be molded using a simple mold structure, and the ball return prevention member 41 can be formed. Can be easily and reliably pivoted between the main body case 39 and the cover 40.

  Further, in this embodiment, a main body case 39 is integrally formed at the upper end of the regulation rail 10 that defines the inner rail 33 of the firing guide passage 34, and the ball return prevention member 41 is rotated on the main body case 39 and the cover 40. Since the ball return prevention mechanism 35 is configured to be pivotally supported, the ball return prevention mechanism 35 can be easily assembled in a wide space, and the game is performed in a state where the regulation rail 10 and the ball return prevention mechanism 35 are unitized. It can be attached to the board 7. However, the ball return prevention mechanism 35 and the regulation rail 10 may be configured separately, and the ball return prevention mechanism 35 configured as a single unit may be disposed at the upper end of the regulation rail 10.

DESCRIPTION OF SYMBOLS 1 Machine frame 2 Main body frame 3 Front door 7 Game board 8 Game area 9 Guide rail 10 Control rail 16 Operation handle 23 Launching device (launching means)
24 Variable display unit 32 Outer rail 33 Inner rail 34 Launch guide passage 35 Ball return prevention mechanism 39 Body case 39a Bottom plate portion 39b Side plate portion 39c Stopper wall 39d Bearing portion 39e Guide groove 40 Cover 40a Mounting hole 40b Positioning hole 40c Bearing portion 41 Ball Return prevention member 41a Shaft hole 41b Open / close valve 41c Weight part 41d Engagement pin 41e Mounting recess 42 Screw 43 Base member 44 Support shaft S1 Notch S S Recess P Pachinko machine

Claims (2)

A launching means for launching a game ball, a launch guide passage for guiding the game ball launched by the launch means to the game area, and a base member extending to the exit of the launch guide passage are pivotally supported by the base member. A ball return prevention member, and the ball return prevention member rotates in a direction to open the outlet, thereby allowing the game ball to flow into the game area, and the ball return prevention member closes the outlet. In the pachinko machine that prevents the return of the game ball to the launch guide passage by turning back in the direction to
The base member has a recess for accommodating the ball return prevention member, a stopper wall provided at an upper opening end of the recess, and a guide groove provided in a side wall of the recess,
The ball return prevention member includes an on-off valve that opens and closes the outlet of the firing guide passage, a weight portion that biases the on-off valve in a closing direction, and a shaft portion that is positioned between the on-off valve and the weight portion. together with the engaging pin which is inserted into the guide groove are projected on the side surface of the weight portion,
When the ball return prevention member rotates in the opening direction around the shaft portion, the maximum opening angle of the ball return prevention member is defined by bringing the opening / closing valve into contact with the stopper wall. None, when the ball return prevention member rotates in the closing direction around the shaft portion, the ball return prevention member is in the initial position by bringing the engagement pin into contact with one end of the guide groove. A pachinko machine characterized by stopping. 2. The base member according to claim 1, wherein the base member includes a main body case and a cover. The main body case is formed with a notch that opens one side surface of the recess, and the notch is closed. The pachinko machine is characterized in that the cover is attached to the main body case, and the shaft portion of the ball return preventing member is rotatably supported by the main body case and the cover.