JP2015171488A - Game machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a game machine whose number of components is reduced to the necessary minimum and which has a backflow prevention device without a fragile part that is easily broken as a result of collision of a game ball with a backflow prevention piece.SOLUTION: The game machine includes: a base 41 having an engaged portion 45 to be engaged with a fitting member 16; a shaft member 55 to be inserted (pressed) into a shaft hole 44a; and a backflow prevention piece 60 supported by the shaft member to be rotatable. The engaged portion has a fitting piece 50 that can be attached to the fitting member; the fitting piece has a stopper projection 51 that can be fitted into a fitting hole formed in the fitting member; and a peripheral line of the stopper projection planarly contacts with an inner peripheral edge of the fitting hole.

Description

  The present invention relates to a gaming machine having an improved backflow prevention device that prevents a game ball launched from a launching device via a game ball introduction path from returning to the game ball introduction path.

In pachinko machines, various board parts such as a game nail, a winning opening, a windmill, a symbol display device, and an illumination device are provided in the game area of the game board in order to diversify the game contents.
At the left edge of the game area, a pair of guide rails for guiding a game ball launched from the launching device into the game area is provided, and a game ball introduction path is formed between the two guide rails.
At the boundary between the game ball introduction path and the game area, a backflow prevention device is arranged to prevent the game ball that has entered the game area from returning to the game ball introduction path (Patent Document 1).

  FIGS. 8A and 8B are a front side perspective view and a rear side perspective view showing a backflow prevention device and an inner guide rail used in a conventional pachinko gaming machine, and FIG. 9 is a perspective view of the conventional backflow prevention device. FIG. 10A and FIG. 10B are a front side perspective view and a front longitudinal sectional view showing a state where a conventional backflow prevention device is attached to the inner guide rail, and FIG. FIGS. 12B and 12C are a front view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB of the conventional backflow prevention device, and FIG. 12 is a bottom view illustrating the locked state between the locking hole and the stopper protrusion. It is.

As shown in FIG. 10 (a), an outer guide rail 127 and an inner guide rail 125 are arranged to face each other with a predetermined gap on the outer peripheral left edge of the game board 120. This gap constitutes a game ball guiding path P for guiding the game ball B1 fired from the launching device located below into the game area 121 located in the right direction of the inner guide rail.
The backflow prevention device 100 is attached to the front end portion of the inner guide rail 125.
The backflow prevention device 100 is locked to the front end portion of the inner guide rail 125, thereby allowing the game ball B1 moving upward in the game ball guide path P to enter the game area 121 while playing the game. It is a means for preventing reversion into the ball guide path P.

As shown in FIG. 9 and the like, the backflow prevention device 100 includes a base member 101 having an opening 102 and a backflow prevention piece 112 that is pivotally supported by a shaft member 110 supported in the opening 101. The shaft member 110 and the lid member 115 that fixes the backflow prevention piece 112 to the base member 101 by being assembled into the opening 102 from the bottom surface of the base member 101 are roughly provided. Except for a part of the backflow prevention piece 112, the backflow prevention device is made of a resin material.
The shaft support holes 103 formed in the two opposing inner walls of the opening 102 of the base member are open on the bottom surface side, and both ends of the shaft member 110 can be inserted into the shaft support holes from this open part. A recess 104a is formed in the lower portion 104 of the base member.
The backflow prevention piece 112 is integrally configured by a shaft hole 112a through which the shaft member 110 is inserted, a valve body 112b for opening and closing the game ball guide path P, and a balancer portion 112c having a built-in metal weight 112d. .
In a state where the shaft member 110 is inserted into the shaft hole 112a of the backflow prevention piece 112, both ends protruding from the shaft hole are inserted into the shaft support holes 103, and then the cover member 115 is assembled to close the opening 102. Thus, the assembly of the backflow prevention device is completed.

The lid member 115 includes a main body 116 that is assembled to the bottom surface of the base member and closes the opening 102, and a tongue-shaped attachment piece 117 that protrudes downward in a crank shape from the lower portion of the main body 116. By engaging the locking claws 116a provided on the two outer walls of the main body 116 of the lid member with the locked portions (recesses, thin-walled portions) 105 provided at corresponding positions on the inner wall of the opening of the base member, The lid member is locked to the base member. The peripheral portion of the opening that is locked by the locking claw 116a is a thin portion 105a due to the provision of the recessed locking portion 105. When the lid 116 is assembled to the bottom surface of the base member, The locking claw 116a gets over the thin wall portion while elastically deforming and is seated and locked in the locked portion 105 (FIGS. 9, 11, and 12).
In a state where the main body 116 of the lid member closes the opening portion 102, the attachment piece 117 extends to the surface side of the base member via the opening portion 102, and is disposed to face the lower portion 104 of the base member in parallel. The end portion of the inner guide rail 125 is press-fitted between the lower portion 104 of the base member and the mounting piece 117. A stopper projection 117a is provided on one surface of the mounting piece 117 so as to elastically fit into a locking hole 125a formed penetrating the tip of the metal inner guide rail to prevent the stopper from protruding.

  As shown in the cross-sectional view of FIG. 10B, the attachment piece 117 of the lid member 115 is disposed opposite to the recess 104a provided in the lower portion 104 of the base member. When the tip of the inner guide rail is press-fitted between the lower part 104 of the base member and the mounting piece 117, the stopper projection 117a is fitted into the locking hole 125a, so that the backflow prevention device 100 is attached to the tip of the inner guide rail. Can be locked.

As shown in FIG. 12, the locking hole 125a is formed in a substantially circular shape, while the stopper protrusion 117a is formed in an arc shape in which an outer peripheral edge portion 117b in contact with the locking hole 131 has a smaller radius of curvature than the locking hole. Has been. Further, in order to reduce the dimensional accuracy between components and increase the ease of assembly, the opening area of the locking hole 125a is configured to be significantly larger than the outer peripheral shape of the stopper protrusion 117a. The contact location between the inner peripheral edge of the locking hole 125a and the outer peripheral edge portion 117b of the stopper projection is a point contact at substantially one point in a bottom view, and the contact area is extremely narrow. Further, when viewed from the direction of the arrow C, the contact range extends linearly by the thickness of the stopper protrusion 117a and the inner peripheral thickness of the locking hole 125a, but the contact area is still very narrow.
Thus, the conventional backflow prevention device 100 is composed of four parts such as the base member 101, the shaft member 110, the backflow prevention piece 112, and the lid member 115, and the configuration of the base member and the lid member is complicated. , Manufacturing costs (metal mold cost), and the number of assembling has increased.

Moreover, as shown in FIG. 11, the bottom part of the to-be-latched part 105 provided in the base member is the thin part 105a. On the other hand, when the backflow prevention piece 112 repeatedly opens and closes frequently, the balancer portion 112c including the weight 112d of the backflow prevention device repeatedly hits the lid member. Since the portion of the lid member that the balancer collides with is the position corresponding to the locking claw 116a and the locked portion 105 (thin wall portion 105a), the thin wall portion 105a is likely to crack.
In particular, in a recent gaming machine in which the outer shape of a center accessory (not shown) arranged in the center of the game board surface is enlarged and the distance from the backflow prevention device 100 is close, the space between the backflow prevention device and the center accessory is narrow. A game nail (not shown) in the game area is located closer to the backflow prevention device 100. For this reason, the momentum of the game ball B2 that rebounds from the game nail and collides with the valve body 112b increases, and the damage that the balancer 112c gives to the thin portion 105a of the base member increases, cracks occur in the thin portion, and the lid member It is easy to drop off from the base member.

Further, since the contact area between the stopper protrusion 117a of the mounting piece extending from the lid member and the inner peripheral surface of the locking hole 125a of the metal inner guide rail is small, the resin stopper protrusion 117a is made of metal. It becomes easy to wear between the inner peripheral surface of the blind hole. For this reason, a situation has occurred in which the stopper protrusion 117a is dropped from the locking hole 125a and the backflow prevention device is dropped from the inner guide rail due to a part of the stopper protrusion being shaved and deformed or cracked.
Patent Document 1 does not even suggest such a problem and its solution.

JP 2011-50560 A

  The present invention has been made in view of the above, and includes a backflow prevention device that reduces the number of parts to the minimum necessary number and eliminates a fragile portion that is easily damaged due to a collision of a game ball with the backflow prevention piece. The purpose is to provide a game machine.

  In order to achieve the above object, a gaming machine according to claim 1 includes a game ball introduction path for guiding a game ball launched from a launching device, and a game area into which a game ball discharged from the game ball introduction path enters. A backflow prevention device for preventing a game ball in the gaming area from flowing back into the game ball introduction path, and a mounting member for supporting the backflow prevention device, wherein the backflow prevention The apparatus includes a base having a locked portion that is locked to the mounting member, a shaft member that is inserted into a shaft hole formed in the base, and a shaft that is rotatably supported by the shaft member. A backflow prevention piece, wherein the locked portion includes a mounting piece attached to the mounting member, and the mounting piece includes a stopper projection that fits into a mounting hole provided in the mounting member, The outer periphery of The inner peripheral edge of only the hole, characterized in that in surface contact along the circumferential direction.

  According to the present invention, it is possible to reduce the number of parts to a necessary minimum number and to eliminate a fragile portion that is easily damaged due to a collision of a game ball with a backflow prevention piece.

It is a front view which shows the whole structure of the pachinko gaming machine as an example of the gaming machine to which the present invention is applied. It is a front perspective view which shows the whole structure of the unit including a game board. (A) is a perspective view of a game board, a center member, and inner and outer guide rails, etc., and (b) is an enlarged perspective view showing the relationship between the inner guide rail and the backflow prevention device. It is explanatory drawing which shows the correspondence before the assembly | attachment of the backflow prevention apparatus which concerns on one Embodiment of this invention, and an inner side guide rail, (a) is a surface side perspective view, (b) is a back side perspective view. It is a disassembled perspective view which shows each element which comprises a backflow prevention apparatus. (A) thru | or (c) is sectional drawing explaining the process which the game ball passes the backflow prevention apparatus, and the state which is preventing backflow sequentially. It is a back view which shows the state which assembled | attached the backflow prevention apparatus with the inner side guide rail. (A) And (b) is the surface side perspective view and back surface side perspective view which show the backflow prevention apparatus and inner guide rail which are used for the conventional pachinko game machine. It is a disassembled perspective view of the conventional backflow prevention device. (A) And (b) is the surface side perspective view which shows the state which attached the conventional backflow prevention apparatus to the inner side guide rail, and a front longitudinal cross-sectional view. (A), (b), and (c) are the surface view, AA sectional drawing, and BB sectional drawing of the conventional backflow prevention apparatus. It is a bottom view explaining the latching state of a latching hole and a stopper protrusion.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
FIG. 1 is a front view showing an overall configuration of a pachinko gaming machine as an example of a gaming machine to which the present invention is applied, and FIG. 2 is a front perspective view showing an overall configuration of a unit including a gaming board. a) is a perspective view of a game board, a center member, and inner and outer guide rails, etc., and (b) is an enlarged perspective view showing the relationship between the inner guide rail and the backflow prevention device.

In FIG. 1, a gaming machine 1 includes an outer frame 2 attached to an island facility of a game store, and an inner frame 3 that is supported by the outer frame 2 so that one vertical side can be rotated. The inner frame 3 is provided with a game board 12 in which a game area 13 in which game balls flow down is formed.
The inner frame 3 supports a glass plate (not shown) that covers the game area 13 so as to be visible in front of the game board 12 (player side).
The outer frame 2 includes a game board unit including a game board 12, a base frame body 30 fixed to the back surface of the game board, and an image display unit (image display device, image display cover) fixed to the back surface of the base frame body. U is assembled so that it can be freely opened and closed (FIG. 2).

The inner frame 3 is provided with a launching device (operation handle) 4 that launches a game ball toward the game area 13 by being rotated, a tray unit 5 having a tray 6 that stores the game ball, and the like. ing.
When the player rotates the launching device 4, a game ball is launched into the game area 13. When the launched game ball moves up the game ball introduction path P formed between the outer guide rail 15 and the inner guide rail 16 and exceeds the backflow prevention device 40, the game ball 13 reaches the game region 13 and passes through the game region 13. Fall. At this time, the game ball falls unpredictably by a plurality of nails and windmills provided in the game area 13.
In the game area 13 of the game board 12, a plurality of general winning ports 21 are provided. When a game ball wins each of these general winning ports 21, a predetermined prize ball (for example, 10 game balls) is paid out.

In addition, a first start port 22 and a second start port 23 that form a start region into which a game ball can enter are provided in a region below the center of the game region 13.
When a game ball enters the first start port 22 or the second start port 23, a random number for special symbol determination is acquired, and a right winning lottery (hereinafter referred to as a “big hit lottery”) is performed. Done. When a game ball enters the first start port 22 or the second start port 23, a predetermined prize ball (for example, three game balls) is paid out.
Further, below the right area of the game area 13, there is provided a large winning device 24 that allows a game ball to enter.

The big winning device 24 normally has the big winning port 24a closed by a big winning device movable piece (opening / closing piece) 24b, so that it is impossible to enter a game ball. On the other hand, when a predetermined special game is started, the opening / closing piece 24b is opened, and the opening / closing piece 24b functions as a tray for guiding the game ball into the big prize opening 24a. Can enter the ball. When a game ball enters the big prize opening, a predetermined prize ball (for example, 15 game balls) is paid out.
Furthermore, in order to discharge game balls that have not entered any of the general winning opening 21, the first starting opening 22, the second starting opening 23, and the big winning device 24 into the lowermost area of the gaming area 13. Out port 25 is provided.

An opening 13A is formed at the center of the game area 13, and an annular decorative part (center member) 18 that affects the flow of the game ball is provided along the periphery of the opening 13A. Another decorative member 14 is attached to the center member 18.
An image display device 19 composed of a liquid crystal display device or the like is provided on the back surface (rear surface) side of the game board, which is a substantially central portion (open portion) of the decorative component 18.

The image display device (display means) 19 displays an image on the display screen during standby when no game is being performed, or displays an image according to the progress of the game. Among them, three effect symbols 19a for informing the result of the jackpot lottery to be described later are displayed, and the combination of specific effect symbols 19a (for example, 777) is stopped and displayed, so that the jackpot lottery result Is notified.
A symbol display device 20 for displaying various symbols is provided on the lower left side of the game board 12.
The game area 13 of the game board 12 is surrounded by a sheet metal outer guide rail 15 from the lower left part to the upper right part of the outer periphery. A backflow prevention device 40 is attached to the front end portion of the inner guide rail (attachment member) 16 made of sheet metal disposed to face the left side portion of the outer guide rail 15.

[Embodiment]
FIG. 4 is an explanatory view showing the correspondence before assembling the backflow prevention device and the inner guide rail according to one embodiment of the present invention, (a) is a front side perspective view, and (b) is a rear side perspective view. It is. FIG. 5 is an exploded perspective view showing individual elements constituting the backflow prevention device, and FIGS. 6A to 6C sequentially show the process of the game ball passing through the backflow prevention device and the state in which the backflow is prevented. FIG. 7 is a cross-sectional view for explaining, and FIG. 7 is a back view showing a state in which the backflow prevention device is assembled to the inner guide rail.

The gaming machine according to the present embodiment includes a game ball introduction path P for guiding a game ball B launched from the launching device 4, a game area 13 into which a game ball discharged from the game ball introduction path enters, and a game area The backflow prevention device 40 includes a backflow prevention device 40 that prevents the game balls from flowing back into the game ball introduction path, and an inner guide rail 16 (attachment member) that removably supports the backflow prevention device. The base 41 having the locked portion 45 locked to the inner guide rail 16, the shaft member 55 inserted (press-fitted) into the shaft hole 44 a formed in the base, and the shaft member 55 are inserted. And a backflow prevention piece 60 that is rotatably supported by the shaft member 55. Furthermore, the locked portion 45 includes a mounting piece 50 that is attached to the inner guide rail 16, and the mounting piece includes a stopper projection 51 that fits into a mounting hole 16a provided in the inner guide rail. The configuration in which the inner periphery of the mounting hole 16a is in contact (surface contact) with a large area in a planar shape along the circumferential direction is characteristic.
The base 41 constituting the backflow prevention device 40 is made of resin, and has a substantially square fitting portion (recess or opening) 43 for fitting the portion having the insertion hole 62 of the backflow prevention piece 60, and the fitting portion. A main body 42 having a shaft hole 44a as a through hole that penetrates through the two side portions 44 that are opposed to each other with the 43 interposed therebetween and communicates with the insertion hole 62 of the backflow prevention piece, and a lower center of the main body 42 And a mounting piece 50 as a thin plate-like elastic piece projecting downward from the top.

The locked portion 45 includes a first pinching piece 46, a second pinching piece 47 disposed opposite to the first pinching piece 46, and a slit 47a between the two second pinching pieces 47. And an attachment piece 50 as an elastic plate. A stopper protrusion 51 protrudes from the back surface of the mounting piece 50, and a recess 46 a is formed at a portion of the first pinching piece 46 facing the stopper protrusion 51.
As shown in FIG. 4, when the front end portion of the inner guide rail is inserted into the gap between the first pinching piece 46 and the second pinching piece 47, the stopper projection 51 of the mounting piece is elastically inserted into the mounting hole 16a. It is comprised so that it may fit and be locked to.

The backflow prevention piece 60 includes a base portion 61 having an insertion hole 62 communicating with the two shaft holes 44 a, a backflow prevention valve 63 integrally projecting obliquely upward from the base portion 61, and an integrated internal portion below the base portion 61. And a balancer portion 64 holding a metal weight 64a. The backflow prevention piece 60 is made of resin except for the weight 64a.
The backflow prevention piece 60 has the same configuration as that of the conventional backflow prevention piece 60 described in the related art, and can be used as a common part in the backflow prevention device 40 of the present invention.
When assembling the backflow prevention device 40, first, the base 61 and the balancer portion 64 of the backflow prevention piece 60 are fitted into the fitting portion 43 as a recess formed on the surface of the base 41 as shown in FIG. Combine. At this time, the two shaft holes 44a and the insertion hole 62 are positioned so as to communicate with each other, and one end portion of the shaft member 55 is inserted into the insertion hole 62 from the outside of the one shaft hole 44a. Is completed when it reaches the other shaft hole 44a.

The axial length of the shaft member 55 is set to an appropriate length so that both end portions thereof do not protrude outward from the shaft holes 44a.
Each shaft hole 44a allows the shaft member 55 to be press-fitted from one end thereof, and has an inner diameter that can apply a clamping pressure to the outer surface of the shaft member to the extent that the shaft member does not fall off after completion of the press-fitting. Further, when the shaft member 55 is inserted into the insertion hole 62 of the backflow prevention piece 60, the inner diameter of the insertion hole 62 is set so that the entire backflow prevention piece 60 can be smoothly swung around the shaft member. .
Alternatively, the inner diameter of one shaft hole 44a is set to be large so that the shaft member 55 can be easily inserted, and the inner diameter of the other shaft hole 44a is set to be small so as to press-fit the shaft member. In this case, after inserting the shaft member from one shaft hole 44a and passing it through the insertion hole 62, the tip end portion of the shaft member is press-fitted and fixed in the other shaft hole 44a.

In the backflow prevention device 40, the backflow prevention valve 63 normally closes the game ball guiding path P by the action of the balancer portion 64, but as shown in FIGS. 6 (a) and 6 (b), the backflow prevention valve 40 faces upward from the game ball introduction path P. The backflow prevention valve 63 is allowed to pass through the game ball B1 that is moving in the clockwise direction. On the other hand, the backflow prevention valve 63 prevents the backflow into the game ball introduction path for the game ball B2 that rebounds from the game area and collides with the backflow prevention valve 63 (FIG. 6C).
At this time, the load received by the backflow prevention valve 63 from the game ball B2 is applied to the base 41 via the balancer portion 64. However, since the contact surface D between the balancer portion and the base is a thick portion, this portion Only do not wear out with special damage compared to other parts. In other words, in the present invention, the base configuration is simplified, and it is no longer necessary to provide a thin portion (fragile portion) for locking a lid member as a separate member as in the prior art, so the durability is greatly improved. be able to.
For this reason, even if a strong game ball bounced off by a game nail that has been placed at a close distance of the backflow prevention device 40 due to an increase in the size of the center member 18 collides with the backflow prevention valve 63, It is possible to prevent the contact surface D from being worn out or destroyed due to the impact of for a long time.

Next, as shown in FIGS. 4, 6, and 7, the mounting piece 50 includes a stopper projection 51 that fits into a mounting hole 16 a provided in the inner guide rail 16, and the outer peripheral edge of the stopper projection is the mounting hole 16 a. A characteristic is a configuration in which the inner peripheral edge is in a linear (astigmatic) shape as viewed from the bottom over a wide area.
The stopper projection 51 is circular when viewed from the back side, but the back side is not a flat surface, but a thick part 51a that is in contact with the inner and outer peripheral surfaces of the mounting hole 16a, and is inclined downward from the thick part. However, it is comprised from the thin part 51b from which thickness decreases gradually. Sufficient locking force and durability are maintained by the surface contact of the thick portion 51a and the inner peripheral edge of the mounting hole over a predetermined circumferential width E. When the locked portion 45 of the backflow prevention device 40 is press-fitted into the distal end portion of the inner guide rail by manual work and the stopper projection 51 is fitted into the mounting hole 16a, the inclined surface of the thin portion 51b is the inner guide rail. The stopper projection is guided into the mounting hole while smoothly sliding in contact with the tip of the.
The diameter of the stopper protrusion 51 that is circular in the back view is set to be larger than ½ of the diameter of the circular mounting hole 16a. On the other hand, in the conventional example shown in FIG. 12, the diameter of the circular stopper protrusion 117a is ½ or less of the diameter of the circular mounting hole 125a.

As described with reference to FIG. 12, in the conventional backflow prevention device, the contact area of the contact portion 117b between the mounting hole 125a and the stopper projection 117a is minimal, so that the load is concentrated on the contact portion and the stopper is centered on the contact portion. The wear of the protrusion becomes remarkable, and the stopper protrusion is easily worn and cracked, so that it easily falls off from the inner guide rail.
As apparent from a comparison between the configuration of the present invention shown in FIG. 7 and the conventional example of FIG. 12, in the present invention, the contact area of the contact portion E between the mounting hole of the inner guide rail and the stopper projection is the circumferential direction. The load applied to the stopper protrusion 51 by the impact applied to the backflow prevention valve 63 from the game ball B2 can be dispersed, and the amount of wear of the stopper protrusion can be reduced. For this reason, the stopper protrusion does not wear out or break for a long time, and can play a role of maintaining the locked state between the inner guide rail and the backflow prevention device.

In addition, since the opening area of the mounting hole 16a is significantly larger than the area of the stopper projection 51, it is very easy to fit the stopper projection into the mounting hole.
Since it is necessary to secure a large contact area of the contact portion E between the inner peripheral edge of the mounting hole and the outer peripheral edge of the stopper protrusion, the stopper protrusion itself has a greater strength than the opening area of the mounting hole. Is also growing.
For this reason, in a gaming machine in which a game nail is planted in the immediate vicinity of the backflow prevention device 40 due to an increase in the size of the center member 18, a strong game ball immediately after rebounding from the game nail is a backflow prevention valve 63. Even if it collides with, it can prevent for a long time that the stopper protrusion 51 is worn out.
In addition, the back view shape of the stopper protrusion is not necessarily circular, and may be any overall shape as long as the contact area with the inner periphery of the attachment hole 16a can be secured widely in the circumferential direction.
Further, in the present invention, the backflow prevention device 40 is constituted by three points of the base 41, the backflow prevention piece 60, and the shaft member 55, and the structure of the base is simplified, so that the number of manufacturing steps (mold structure) and the number of assembly steps are reduced. Is reduced and the number of failures is reduced.

[Summary of Configuration, Action, and Effect of the Present Invention]
The gaming machine according to the present invention includes a game ball introduction path P for guiding a game ball launched from a launching device, a game area 13 into which a game ball discharged from the game ball introduction path enters, and a game ball in the game area. Is provided with a backflow prevention device 40 that prevents backflow into the game ball introduction path, and an inner guide rail (attachment member) 16 that supports the backflow prevention device. A base 41 having a locked portion 45 to be locked, a shaft member 55 inserted (press-fitted) into a shaft hole 44a formed in the base, an insertion hole 62 through which the shaft member is inserted, and And a backflow prevention piece 60 pivotally supported by the shaft member. The locked portion 45 includes a mounting piece 50 attached to the inner guide rail, the mounting piece includes a stopper projection 51 that fits into a mounting hole 16a provided in the inner guide rail, and the outer peripheral edge of the stopper projection is a mounting hole. The inner peripheral edge is in a planar contact within a predetermined angular range along the circumferential direction.

The backflow prevention device 40 according to the present invention is composed of three parts: a base 41, a backflow prevention piece 60, and a shaft member 55. Only the structure of the base 41 is different from the base of the conventional backflow prevention device, and the backflow prevention piece 60 and the shaft member 55 can be used as they are.
The major difference between the conventional backflow prevention device and the present invention is that, in the past, a separate cover member was used to fix the shaft member to the base. However, in the present invention, the shaft member itself is provided on the base. Since the shaft hole 44a is supported so as not to drop off, a member corresponding to the lid member can be eliminated.
For this reason, there is no fragile portion such as a thin portion provided in the base for locking the locking claw provided in the lid member, and the strength of the base can be increased. That is, durability can be improved even if the frequency and load of game balls collide increase. In particular, the base is not damaged by a strong load received from a rebound ball from a game nail that is arranged at a close distance of the backflow prevention device due to an increase in the size of the center member.

Moreover, since the attachment piece in the conventional backflow prevention device is not provided on the base but is provided on the lid member, the configuration of the lid member is complicated. In the present invention, since the mounting piece is a part of the base itself, the configuration can be simplified and the number of assembling steps can be reduced.
Further, conventionally, in order to lock the backflow prevention device in the mounting hole of the mounting member such as the inner rail, the stopper protrusion provided on the mounting piece is fitted into the mounting hole, and the inner periphery of the mounting hole and the outer periphery of the stopper protrusion And contact. However, since the diameter (area) of the stopper projection is significantly smaller than the diameter (opening area) of the mounting hole, its mechanical strength is not sufficient, and the contact area between the two is extremely small. It was easy to be worn out and damaged from the contact point.

In the present invention, the inner peripheral surface of the mounting hole and the outer peripheral surface of the stopper projection are in surface contact over a wide area (circumferential length), so that the durability of the contact portion is improved and the stopper projection is worn out. It became possible to greatly suppress. Specifically, since the radius of curvature of the arcuate outer peripheral surface of the circular stopper projection is set closer to the radius of curvature of the circular mounting hole, the contact area and contact length in the circumferential direction are expanded. It became possible. Further, it is possible to increase the strength by increasing the diameter of the stopper protrusion.
More specifically, since the diameter of the stopper protrusion 51 is set to be larger than ½ of the diameter of the circular mounting hole 16a, the contact area is increased along the circumferential direction. On the other hand, in the conventional example shown in FIG. 12, the diameter of the stopper protrusion 117a is significantly smaller than half of the diameter of the mounting hole 125a (almost 1/3). In contact.
Furthermore, in the present invention, when the stopper projection 51 is fitted into the mounting hole 16a and brought into surface contact, a sufficient gap is formed between the inner periphery of the mounting hole and the outer periphery of the stopper projection. Since the diameters (areas) were made different, the dimensional accuracy of both members could be reduced, facilitating production, and facilitating assembly.
The attachment member 16 as a means for attaching the backflow prevention device is not limited to the inner guide rail. The attachment member may be a game board or other member provided in another part.
The gaming machine according to the present invention can be applied not only to pachinko gaming machines but also to pachislot machines and other gaming machines in general.

DESCRIPTION OF SYMBOLS 1 ... Game machine, 2 ... Outer frame, 3 ... Inner frame, 4 ... Launching device, P1 ... Game ball introduction path P, 13A ... Opening part, 14 ... Decoration member, 15 ... Outer guide rail, 16 ... Inner guide rail ( Mounting member), 16a ... mounting hole, 18 ... center member, 18 ... decorative part, 19 ... image display device, 19a ... production design, 21 ... general prize opening, 22 ... start opening, 23 ... start opening, 24 ... grand prize Device, 24a ... Grand prize opening, 24b ... Opening / closing piece, 25 ... Out port, 30 ... Base frame, 40 ... Backflow prevention device, 41 ... Base, 42 ... Main body, 43 ... Fitting part, 44 ... Side part, 44a ... shaft hole, 45 ... locked portion, 46 ... first pinching piece, 46a ... recess, 47 ... second pinching piece, 47a ... slit, 50 ... mounting piece, 51 ... stopper projection, 55 ... shaft member , 60 ... Backflow prevention piece, 61 ... Base, 62 ... Insertion hole, 63 ... Backflow prevention , 64 ... balancer unit, 64a ... weight

As shown in FIG. 9 and the like, the backflow prevention device 100 includes a base member 101 having an opening 102 and a backflow prevention piece 112 that is pivotally supported by a shaft member 110 supported in the opening 102 . The shaft member 110 and the lid member 115 that fixes the backflow prevention piece 112 to the base member 101 by being assembled into the opening 102 from the bottom surface of the base member 101 are roughly provided. Except for a part of the backflow prevention piece 112, the backflow prevention device is made of a resin material.
The shaft support holes 103 formed in the two opposing inner walls of the opening 102 of the base member are open on the bottom surface side, and both ends of the shaft member 110 can be inserted into the shaft support holes from this open part. A recess 104a is formed in the lower portion 104 of the base member.
The backflow prevention piece 112 is integrally configured by a shaft hole 112a through which the shaft member 110 is inserted, a valve body 112b for opening and closing the game ball guide path P, and a balancer portion 112c having a built-in metal weight 112d. .
In a state where the shaft member 110 is inserted into the shaft hole 112a of the backflow prevention piece 112, both ends protruding from the shaft hole are inserted into the shaft support holes 103, and then the cover member 115 is assembled to close the opening 102. Thus, the assembly of the backflow prevention device is completed.

In order to achieve the above object, a gaming machine according to claim 1 includes a game ball introduction path for guiding a game ball launched from a launching device, and a game area into which a game ball discharged from the game ball introduction path enters. A backflow prevention device for preventing a game ball in the gaming area from flowing back into the game ball introduction path, and a mounting member for supporting the backflow prevention device, wherein the backflow prevention The apparatus includes a base having a locked portion that is locked to the mounting member, a shaft member that is inserted into a shaft hole formed in the base, and a shaft that is rotatably supported by the shaft member. A backflow prevention piece, wherein the locked portion includes a mounting piece attached to the mounting member, and the mounting piece includes a stopper projection that fits into a mounting hole provided in the mounting member, The outer periphery of The inner periphery of the drilling and tapping, are in surface contact along a circumferential direction, and the area of the back surface view of the stopper projection is characterized in that said at least 1/2 of the opening area of the mounting holes.

Claims (1)

A game ball introduction path for guiding a game ball launched from the launching device, a game area into which a game ball discharged from the game ball introduction path enters, and a game ball in the game area in the game ball introduction path A gaming machine comprising a backflow prevention device that prevents backflow and an attachment member that supports the backflow prevention device,
The backflow prevention device includes a base having a locked portion that is locked to the mounting member, a shaft member that is inserted into a shaft hole formed in the base, and the shaft member is rotatable by the shaft member. An axially supported backflow prevention piece,
The locked portion includes a mounting piece attached to the mounting member, and the mounting piece includes a stopper protrusion that fits into a mounting hole provided in the mounting member;
A gaming machine, wherein an outer peripheral edge of the stopper projection is in surface contact with an inner peripheral edge of the mounting hole along a circumferential direction.

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