JP5092362B2 - Pachinko machine - Google Patents

Description

  The present invention relates to a pachinko machine provided with fraud detection means for detecting fraud.

  As one of the misconducts to pachinko machines that have been used for a long time, a wire member such as a piano wire or a synthetic resin thin plate such as an acrylic plate is inserted through the gap in the frame of the pachinko machine. There is an act of making the game ball easily enter the winning opening by changing the inclination of the nail by hooking it on the adjustment nail for adjusting the winning rate of the book.

  Therefore, in order to make it impossible to change the inclination of the two adjusting nails, a method of providing a regulating means on the adjusting nails is conceivable (for example, see Patent Document 1). In the prior art described in Patent Document 1, an engagement portion that engages with the head of the adjustment nail is provided mainly for the purpose of limiting the adjustment of the adjustment nail by the pachinko parlor side. Specifically, a pair of circular recesses are formed in the engaging portion, and the pair of recesses and the heads of the two adjusting nails are engaged. When an oval concave portion is formed in the engaging portion, the adjustment nail can be adjusted within that range.

Japanese Patent Laid-Open No. 11-299977

  However, even if the engaging portion described in Patent Document 1 is provided between the two adjusting nails, the nail adjustment is possible if the engaging portion is destroyed by an unauthorized person. In this case, although the destroyed trace remains in the engaging portion, the illegal act can be continued until the trace is found, so that the method for preventing the illegal act is incomplete.

  Accordingly, an object of the present invention is to provide fraud detection means for immediately detecting when an illegal act has been performed by detecting that an illegal operation has been performed on the two adjustment nails directly above the winning opening. Is to provide a pachinko machine.

The present invention relates to a pachinko machine having a game board, a winning opening provided in the gaming board, and two adjusting nails for adjusting a winning rate provided immediately above the winning opening.
A recess formed in the game board and having a bottom surface on which the two adjusting nails are driven;
A constraining member provided between the two adjusting nails and restraining the relative displacement of each adjusting nail;
A strain detecting element attached to the restraining member for detecting strain of the restraining member;
Based on the output from the strain detection element, and when the output satisfies a predetermined criterion, a determination means for outputting a signal for notification,
The restraining member is formed with a pair of through holes having an inner diameter larger than the outer diameter of each adjustment nail,
Each adjustment nail is provided through the pair of through holes ,
The restraint member is a pachinko machine whose surface is characterized Rukoto provided in the recess so as to smoothly connect the surface of the game board.

Further, the present invention provides a pachinko machine having a game board, a winning opening provided in the gaming board, and two adjusting nails for adjusting a winning rate provided immediately above the winning opening.
A constraining member provided between the two adjusting nails and restraining the relative displacement of each adjusting nail;
A strain detecting element attached to the restraining member for detecting strain of the restraining member;
Based on the output from the strain detection element, and when the output satisfies a predetermined criterion, a determination means for outputting a signal for notification,
The restraining member is formed with a pair of recesses larger than the outer diameter of the head of each adjustment nail,
Each adjusting nail is a pachinko machine characterized in that the head is engaged with each of the pair of recesses.

According to the present invention, since there is a gap around each adjustment nail, it is possible to adjust the nail for adjusting the winning rate within the gap. Since the strain detecting element detects that the inclination of the adjusting nail has been changed beyond the range allowed by the gap, an unauthorized operation can be determined.

Further, according to the present invention, the restraining member is provided in the vicinity of the head of each adjusting nail where the interval between each adjusting nail becomes larger when each adjusting nail is tilted due to fraud. The distortion generated in the game will be larger, and the movement of the game ball will not be hindered. Therefore, an illegal act can be detected more accurately and reliably.

First, an outline of the configuration and function of the pachinko machine 1 to which the present invention is applied will be described.
FIG. 1 is a front perspective view showing an example of the overall configuration of a pachinko machine 1 according to the present invention. FIG. 2 is a front view showing an example of the configuration of the game board 20 of the pachinko machine 1 according to the present invention.

  In FIG. 1, a pachinko machine 1 includes a wooden rectangular outer frame 2 for fixing to an island facility, and a pair of synthetic resin inner frames 3 are provided above and below the left side of the outer frame 2. The hinges 3a and 3b are attached to be freely opened and closed. Further, a front door 4 made of synthetic resin is attached to the substantially upper half of the inner frame 3 through a pair of hinge portions 4a and 4b provided above and below the left side portion so as to be freely opened and closed. The front door 4 is provided with a glass window 6 so that a game area 21 of a game board 20 described later can be seen. A locking device (not shown) for locking the front door 4 to the inner frame 3 and locking the inner frame 3 to the outer frame 2 is provided on the right side of the pachinko machine 1. A key insertion portion 5 for the locking device is provided on the right side of the front door 4. Hereinafter, the front door 4 side is referred to as the front side or the front side with respect to the outer frame 2 side, and conversely, the outer frame 2 side is referred to as the rear side or the back side with respect to the front door 4 side.

  In FIG. 1, an upper plate 7 that receives a prize ball to be paid out when a game ball is won is disposed below the front door 4, and a lower plate 8 is disposed below the upper plate 7. Yes. The lower plate 8 is used for receiving a prize ball when the upper plate 7 is filled with a prize ball. An operation handle 9 is provided on the lower right side of the upper plate 7 so that the launching force of the game ball can be adjusted by the launching device (not shown). The launching device communicates with the upper plate 7, and a game ball is supplied from the upper plate 7 to the launching device. Further, at each of the upper right, upper left, lower right, and lower left corners of the front door 4, a speaker 10 for producing a sound effect and an electric lamp 11 for displaying an error display are arranged. On the back side of the pachinko machine 1, a control board (not shown) provided with a control circuit such as a microprocessor for controlling the pachinko machine 1 and a RAM (Random Access Memory) is disposed.

  Next, with reference to FIG. 2, the structure and function of the game board 20 which comprises the pachinko machine 1 are demonstrated in detail.

  The game board 20 shown in FIG. 2 includes a wooden plate-like game board 80, a soft synthetic resin cell sheet 81 on which a design diagram attached to the front side is drawn, and a front side of the game board 80. A plurality of structures such as a plurality of winning openings 40, 48, 50, 53, 56, 59 and the like, a plurality of nails 22, and an annular shape standing so as to surround each structure and the plurality of nails 22 Rail 23. The game board 20 is detachably attached to the inner frame 3 so that the board surface of the game board 80 stands substantially vertically. Here, the game area 21 is an area surrounded by the annular rail 23. A game ball launched from a launching device (not shown) is driven into a game area 21 along a guide path 24 constituted by rails 23, and a game is repeated while repeatedly colliding with a plurality of nails 22 in the game area 21. It falls in the area 21.

  The symbol display device 30 provided substantially at the center of the game area 21 includes a liquid crystal display (LCD) 31 and a decorative member 32. The liquid crystal display 31 includes a first display area 33, a second display area 34, and a third display area 35 that display a changing symbol. In addition, four holding lamps 36 are provided on the decorative member 32 above the liquid crystal display 31. The display of the changing symbols by the display areas 33 to 35 and the lighting of the holding lamp 36 are related to winning at the start winning opening 40 as will be described later.

  In FIG. 2, there are three types of winning holes for the game balls to win: a start winning port 40, a big winning port 48, and general winning ports 50, 53, 56, 59. A ball receiving portion 43, 52, 55, 58, 61 having an upper opening is mounted on the front side of the start winning opening 40 and each of the general winning openings 50, 53, 56, 59, and each winning opening 40, 48, In each of 50, 53, 56, and 59, a winning opening switch (not shown) for detecting a winning of a game ball is provided. Further, a pair of opening and closing blade members 42a and 42b are provided on the left and right sides of the opening of the ball receiving portion 43 of the start winning opening 40, and the opening and closing blade members 42a and 42b are opened so that game balls can easily enter the starting winning opening 40. The position and the closed position where the game ball is difficult to enter are taken. The opening / closing operation of the opening / closing blade members 42a, 42b is driven by a solenoid (not shown).

  The start winning opening 40 is arranged directly below the symbol display device 30. When a winning of a game ball is detected by a winning opening switch (not shown) of the start winning opening 40, a lottery by a microprocessor provided on the control board is performed. Is done. Along with this lottery, the liquid crystal display 31 produces an effect that the symbols of the display areas 33 to 35 change and stop for a predetermined time. For example, when a number from 0 to 9 is displayed as an example of a design to be produced, after the number from 0 to 9 fluctuates for a predetermined time of several seconds, it stops at any one number from 0 to 9 Is displayed.

  Here, when the game ball wins the start winning opening 40 during the variation of the symbols in the display areas 33 to 35, the lottery by the microprocessor is suspended until the variation of the symbols is stopped. Up to 4 winning numbers during symbol variation are stored in the RAM storage area provided on the control board, and the number of holding lamps 36 equal to the number of winning winnings is turned on to display the number of winning winnings. Is done.

  The large winning opening 48 is provided below the start winning opening 40, and the front portion is covered with a horizontally long rectangular opening / closing door 49 pivotally supported on the lower side. In addition, a solenoid (not shown) for opening / closing the opening / closing door 49 is attached. The open / close door 49 is normally closed, and when the game ball is won at the start winning opening 40 described above, the door is opened by the drive of the solenoid and the upper side is opened. Can receive. Further, at the time of winning, the symbol display device 30 produces an effect of stopping in a predetermined display mode after the symbols of the display areas 33 to 35 change. For example, when numbers 0 to 9 are displayed as an example of the symbol, the numbers are displayed so as to stop together as “777”.

  Two general winning ports 50, 53, 56, 59 are provided on the left and right sides of the starting winning port 40. In order to adjust the winning rate of the game balls to the general winning ports 50, 53, 56, 59 and the starting winning port 40, a pair of left and right adjusting nails is located immediately above the winning ports 40, 50, 53, 56, 59. 41a, 41b, 51a, 51b, 54a, 54b, 57a, 57b, 60a, 60b are provided, respectively. The interval between the pair of left and right adjustment nails is set by the pachinko machine maker so as to have a predetermined winning probability. There are also cases where nails are adjusted by pachinko parlors.

  In the game area 21 shown in FIG. 2, game balls are placed on the left and right sides of the symbol display device 30 as structures other than the symbol display device 30 and the winning holes 40, 48, 50, 53, 56, 59 described above. Passing gates 62 and 64 and windmills 66 and 67 that rotate when a game ball collides are disposed, and an out port 68 is disposed along the rail 23 directly below the big winning port 48. In the out port 68, game balls that have not won the winning ports 40, 48, 50, 53, 56, 59 are collected. Here, each of the gates 62 and 64 is provided with a gate switch (not shown) for detecting a game ball passing through the gate, and when the passage of the game ball is detected, a lottery is performed by a microprocessor provided on the control board. Done. When the lottery is won, the open / close blade members 42a and 42b provided on the front face of the start winning opening 40 are in the open position for a predetermined time of about 1 second, and the game ball is easy to win the start winning opening 40. A pair of left and right adjustment nails 63a, 63b, 65a, 65b for adjusting the gate passage rate are also provided immediately above the gates 62, 64, respectively.

  When a game ball wins each winning opening 40, 48, 50, 53, 56, 59, the winning ball is paid out. As for the number of payouts for one game ball, for example, there are five general winning ports 50, 53, 56, 59, three start winning ports 40, and 14 large winning ports 48 for one game ball winning. Normally, the number of prize balls when winning the big prize opening 48 is set to be considerably large. Therefore, in order for the player to win more prize balls, it is necessary to increase the number of lotteries by increasing the number of winnings at the start winning opening 40 as much as possible. A lot of prize balls can be paid out by winning at the grand prize winning port 48.

  Thus, in order to acquire a large number of prize balls, it is effective to increase the number of game balls to be awarded to the start winning opening 40, and therefore, the two adjustment nails 41a and 41b immediately above the starting winning opening 40. Fraudulent behavior that increases the winning rate by changing the slope of the has been practiced for a long time. For example, a wire member such as a piano wire or a synthetic resin thin plate such as an acrylic plate is inserted through a gap between the front door 4 and the inner frame 3 of the pachinko machine 1 and at least one of the two adjustment nails 41a and 41b. By hooking and pulling on the head, the inclination of the adjusting nails 41a and 41b is changed to widen the interval between the two adjusting nails so that the game ball can easily enter the start winning opening 40. In order to prevent such an illegal act, the present invention uses a strain detection element that detects when the inclination of the adjustment nails 41a and 41b is illegally operated by the player. In the following, first, the principle and structure of the strain detection element used in the present invention will be described.

  FIG. 3 is an explanatory diagram for explaining the principle of the strain detection element according to the present invention. FIG. 4 is a front view showing an example of the configuration of the strain detection element according to the present invention.

  The strain detection element according to the present invention refers to an element that detects elongation or contraction per unit length in a predetermined detection direction. Specifically, a metal resistance strain gauge that measures a change in metal resistance using a metal thin film formed on a film-like insulator, and a semiconductor strain gauge that uses the resistance of a semiconductor such as silicon can be exemplified. it can.

  The principle of the strain detection element will be described with reference to FIG. In FIG. 3, it is assumed that a tensile force P acts on both ends of a rod-shaped material 70 having a length L, the length increases by ΔL, and is deformed to L + ΔL. The value ε of the length increase ΔL and the original length L at this time is called strain. The magnitude of this strain ε can be detected by measuring the resistance of the material 70. Specifically, in FIG. 3, the resistance when a current is passed in the length direction of the material 70 of length L is R, and the resistance of the material 70 when the length is expanded to L + ΔL by the tensile force P is ΔR. Assuming that the resistance changes to R + ΔR, the relationship between the resistance change corresponding to the generated strain and the strain is expressed by the following equation (1). In Equation (1), K is a constant called a gauge factor and is determined by the material 70.

  The strain detection element shown in FIG. 4 is a uniaxial metal resistance strain gauge 72, and has high detection sensitivity in the left-right direction of FIG. The left and right direction in FIG. 4 with high detection sensitivity is referred to as the x direction or the detection direction, and the up and down direction in FIG. 4 perpendicular to the x direction is referred to as the y direction. The metal resistance strain gauge 72 is used by being attached to an area where strain is to be measured using an adhesive.

  In FIG. 4, the metal resistance strain gauge 72 includes a thin electric insulator base 73 and a linear metal wiring pattern 74 which is formed on the surface of the base 73 and is folded back in a large number of shapes. The metal wiring pattern 74 is formed by etching a metal foil. Specifically, the metal wiring pattern 74 includes a detection unit 74a in which a plurality of linear patterns extending in the x direction are arranged in parallel to each other, and a folded portion 74b provided at an end of the detection unit 74a in the x direction. The length of the portion 74a in the x direction is longer than the interval between the linear patterns. Then, strain measurement is performed by detecting a change in resistance caused by expansion and contraction of the linear pattern formed in the detection unit 74a in the x direction. Further, the metal resistance strain gauge 72 of FIG. 4 is provided with electrode pads 75 formed at both ends of the metal wiring pattern 74 and lead lines 76 connected to the electrode pads 75 for detecting a resistance change. . The lead line 76 is connected to a strain detection circuit 90 described in FIG.

  Next, a fraud detection device for a pachinko machine that is the first embodiment of the present invention using the above-described metal resistance strain gauge 72 will be specifically described with reference to FIGS.

FIG. 5 is an enlarged front view showing the vicinity of the start winning opening 40 in the game board 20 of the pachinko machine 1 equipped with the fraud detection device according to the first embodiment on which the present invention is based . 6 is a right side view of the vicinity of the start winning opening 40 shown in FIG. 5, and FIG. 7 is a cross-sectional view taken along the section line VII-VII in FIG. 5 to 7, configurations that are the same as those in FIG. 2 may be denoted by the same reference numerals and description thereof may be omitted.

  As shown in FIGS. 5 and 6, a base 44 having an opening continuous with the start winning opening 40 is mounted in the vicinity of the starting winning opening 40, and the ball receiving portion 43 and the pair of opening / closing blades are provided on the surface of the base 44. Members 42a and 42b are provided. The base 44 is fixed to the game board 80 from above the cell sheet 81 by screws 45a and 45b. On the surface of the base 44, a gate portion 46 through which a game ball passes is installed at a position directly above the ball receiving portion 43. The game ball that has passed between the pair of adjusting nails 41 a and 41 b passes through the gate portion 46 and is guided to the opening of the ball receiving portion 43 and enters the start winning opening 40.

  In the present embodiment, the metal resistance strain gauge 72 is attached to a synthetic resin constraining member 83 that connects the pair of left and right adjustment nails 41a and 41b and fixes the positions of the adjustment nails 41a and 41b. Specifically, a recess 82 is formed in the game board 80, and a plate-like restraining member 83 made of synthetic resin is embedded in the recess 82 with a space between the restraining member 83 and the bottom surface 82a of the recess 82 being separated. A pair of left and right adjustment nails 41 a and 41 b provided immediately above the start winning opening 40 is driven on the bottom surface 82 a of the recess 82 formed in the game board 80 so as to penetrate the restraining member 83. The metal resistance strain gauge 72 which is a strain detecting element is attached to the back side of the restraining member 83 with an adhesive. 5-7, although the illustration of the electrical wiring to the metal resistance strain gauge 72 is omitted, the metal resistance strain gauge 72 is provided on the back side of the pachinko machine 1 by the electrical wiring that penetrates the game board 80. Connected to a later-described strain detection circuit 90 in the control board.

  Here, the strain gauge 72 is attached to the restraining member 83 between the two adjustment nails 41a and 41b, and the detection direction of the metal resistance strain gauge 72 (x direction in FIGS. 4, 5 and 7) is a pair. The adjustment nails 41a and 41b pass through the respective central axis lines so as to substantially coincide with the directions orthogonal to the respective central axis lines. Accordingly, when the inclination of at least one of the adjustment nails changes, the interval between the adjustment nails 41a and 41b changes, so that the change in the interval can be detected by the strain gauge 72.

  In order to detect the change in the interval between the adjusting nails 41a and 41b with high accuracy by the above method, the restraining member 83 is preferably attached as close to the head of the adjusting nails 41a and 41b as possible. This is because the change in the distance between the adjustment nails 41a and 41b that occurs when the inclination of at least one of the adjustment nails 41a and 41b changes due to an illegal act is greater near the heads of the adjustment nails 41a and 41b. Therefore, as described above, the restraining member 83 of the present embodiment is attached so as to be separated from the bottom surface 82 a of the recess 82.

  Further, the restraining member 83 is embedded in the recess 82 of the game board 80 so that the surface of the restraint member 83 is smoothly connected to the surface of the game board 80, and the cell sheet 81 covers the restraint member 83. Affixed to the game board 80. Therefore, the embedding of the restraint member 83 does not affect the behavior of the game ball, and the unauthorized person is not aware of the presence of the restraint member 83 and the metal resistance strain gauge 72. The material of the restraining member 83 is preferably a soft synthetic resin such as polyethylene and polypropylene. Although the restraining member 83 fixes the position of the adjustment nails 41a and 41b, the restraint member 83 made of soft synthetic resin can be expanded and contracted to some extent. This is because the interval can be adjusted.

  FIG. 8 is a block diagram showing a configuration of the distortion detection circuit 90 in the fraud detection device for the pachinko machine according to the present embodiment.

The strain detection circuit 90 of the fraud detection device of the pachinko machine according to the present embodiment includes a Wheatstone bridge configured by the metal resistance strain gauge 72 and the first to third resistors 91 to 93, and an input to the Wheatstone bridge. DC power supply 94 for applying voltage Vcc, differential amplifier 95 for amplifying the output voltage from the Wheatstone bridge, and A / D converter (analog / digital converter) for digitally converting the input voltage Vcc and the amplified output voltage Digital converters 96 and 97, and a microcomputer 98 for calculating the distortion ε from the digitized input voltage Vcc and output voltage. The microcomputer 98 includes a microprocessor, a RAM (Random Access Memory) and a ROM (Read) which are not shown.
Only memory). Each component of these strain detection circuits 90 is arranged on a control board provided on the back side of the pachinko machine 1 except for the metal resistance strain gauge 72.

  Here, the connection relationship of the Wheatstone bridge constituted by the strain gauge 72 and the respective resistors 91 to 93 will be specifically described. First, a DC power supply 94 is provided at each end of the first resistor 91 and the second resistor 92. Are connected and a positive voltage Vcc is input. The other end of the first resistor 91 is connected to the other end of the metal resistance strain gauge 72 having one end grounded, and the other end of the second resistor 92 is grounded. The other end of the third resistor 93 is connected. When connected in this way, a potential Va is generated between the first resistor 91 and the metal resistance strain gauge 72, and a potential Vb is generated between the second resistor 92 and the third resistor 93. The differential amplifier 95 receives the potential difference ΔV = Va−Vb as the output voltage from the Wheatstone bridge, and the amplified output voltage ΔV is input to the microcomputer 98.

Next, a method for measuring the strain ε using the strain detection circuit 90 shown in FIG. 8 will be described.
The resistance values of the first to third resistors 91 to 93 and the resistance value of the metal resistance strain gauge 72 in a state where no strain ε is generated are R [Ω], and the strain ε is applied to the metal resistance strain gauge 72. The increment of resistance when it occurs is ΔR [Ω]. At this time, the values of the potentials Va and Vb and the value of the potential difference ΔV = Va−Vb are expressed by the following equations.

Substituting equation (1) into equation (2) and solving for strain ε yields the following equation (3).

  As apparent from the equation (3), if the input voltage Vcc to the Wheatstone bridge, the output voltage ΔV from the Wheatstone bridge, and the gauge factor K of the metal resistance strain gauge 72 are given, the strain ε can be obtained. In the strain detection circuit 90 shown in FIG. 8, the microcomputer 98 stores the gauge factor K in advance, digitally converts the input voltage Vcc and the output voltage ΔV, and inputs the digital voltage to the microcomputer 98, whereby the microcomputer 98 has the formula (3 ) To obtain the strain ε. Based on the obtained distortion ε, the microcomputer 98 functions as a determination unit that determines whether or not there is an illegal act and outputs a signal for notification when it is determined that there is an illegal act. Next, a specific determination procedure by the microcomputer 98 will be described.

  FIG. 9 is a flowchart showing a procedure for determining the presence or absence of fraud by the microcomputer 98 in the distortion detection circuit 90 shown in FIG. The procedure shown in FIG. 9 starts when the pachinko machine 1 is turned on. The following procedure is executed by the microprocessor of the microcomputer 98 unless otherwise specified.

Step reference value from the memory area strain of s1 in ROM epsilon _s and the time of the reference value t _s is read out, stored in the reference value storage region of the RAM, the flow proceeds to step s2.

  In step s2, the Wheatstone bridge input voltage Vcc1 and the amplified output voltage ΔV1 of the distortion detection circuit 90 in the initial state are digitally converted by the A / D converters 96 and 97, and then input to the microcomputer, and the initial RAM Stored in the voltage storage area.

  In the next step s3, the distortion magnitude ε1 in the initial state is calculated from the initial input voltage Vcc1 and the initial output voltage ΔV1 stored in the RAM. When the nail adjustment is performed by the pachinko parlor, the strain magnitude ε1 corresponding to the nail adjustment is detected as an initial state.

  In the next step s4, the time t measured by the microprocessor is reset to zero. The microprocessor starts measuring time from time t = 0.

  In the next step s5, the input voltage Vcc2 of the Wheatstone bridge of the distortion detection circuit 90 and the output voltage ΔV2 from the Wheatstone bridge in the current state are digitally converted by the A / D converters 96 and 97, and then the microcomputer is used. And stored in the voltage storage area of the RAM. In the subsequent step s6, the distortion magnitude ε2 in the current state is calculated from the input voltage Vcc2 and the output voltage ΔV2 stored in the RAM.

In the next step s7, determine microprocessor is current distortion size .epsilon.2 and strain at the initial state magnitude .epsilon.1 the difference .epsilon.2-.epsilon.1 reference value epsilon _s or more the size of the strain predetermined of To do. When the difference in distortion is greater than or equal to the reference value ε _s, the process proceeds to step s8. When the difference is less than the reference value ε _s , the process returns to step s4, and the time t is reset to zero.

At step s8, the microprocessor determines whether the current time t is previously determined reference value or more t _s time. If the current time t is equal to or higher than the reference value t _s time, that is, when the magnitude reference value epsilon _s or more conditions defining the change .epsilon.2-.epsilon.1 pre-distortion continues during the reference value t _s of time, Proceed to step s9. If the current time t is less than the reference value t _s of predetermined interval of time it returns to step s5, measuring the input voltage Vcc2 and the output voltage ΔV2 of the Wheatstone bridge again.

  In step s9, a signal for notifying that there has been a fraud is output with a sound and light, or for outputting to a computer for pachinko hall management, and the procedure for determining the presence or absence of fraud ends. .

This way the microprocessor, the reference value epsilon _s or more strain of a change in size .epsilon.2-.epsilon.1 the predetermined is determined to continue during the above predetermined interval of time t _s, the game ball impacts the adjusting peg Therefore, only a fraudulent act that intentionally changes the inclination of the adjustment nails 41a and 41b can be reliably determined. Therefore, according to the fraud detection device of the pachinko machine of the present embodiment, it is less likely to make the player feel uncomfortable by notifying the erroneous detection.

  In the above procedure, the difference from the initial state was determined based on the magnitude of distortion, which is the value obtained by dividing the increase in length by the original length, but the increase in length was not compared with the distortion. May be compared with a reference value for the increase in length. That is, the same effect can be obtained even if it is determined that the change in the interval between the adjustment nails based on the output voltage from the Wheatstone bridge of the strain detection circuit 90 exceeds the predetermined reference value and continues for the predetermined time. It is done.

  Next, 2nd-4th embodiment from which the aspect of the restraint member with which an adjustment nail is mounted | worn differs using FIGS. 10-14. The second to fourth embodiments are the same as those of the first embodiment except for the shape and arrangement of the restraining member. Accordingly, the corresponding components are denoted by the same reference numerals and the description thereof is omitted. There is.

FIG. 10 is a cross-sectional view showing the configuration of the adjustment nails 41a and 41b, the restraining member 84, and the strain detection element 72 according to the fraud detection device of the pachinko machine that is the second embodiment premised on the present invention. In FIG. 10, the restraining member 84 includes a first region 84 a that is relatively poor in stretchability and a second region 84 b that can be stretched, and the first region 84 a is defined by a second region 84 b that is located approximately at the center of the restraining member 84. To be separated. For example, hard synthetic resin or metal such as phenol resin and polyester can be used for the first region 84a having poor stretchability, and synthetic rubber can be used for the stretchable second region 84b. The restraining member 84 is formed by fixing the first region 84a and the second region 84b with an adhesive or a screw. One separated first region 84a is penetrated by one adjusting nail 41a, and the other first region 84a is penetrated by the other adjusting nail 41b. That is, the extendable second region 84b is disposed between the adjustment nails 41a and 41b. The metal resistance strain gauge 72, which is a strain detection element, is between the adjustment nails 41a and 41b and extends from one first region 84a separated by the second region 84b to the other first region 84a. Is attached to the restraining member 84 using an adhesive. The x direction, which is the strain detection direction of the metal resistance strain gauge 72, substantially coincides with the direction passing through the axes of the two adjustment nails 41a and 41b and perpendicular to both axes. Although not shown in FIG. 10, the metal resistance strain gauge 72 is connected to the strain detection circuit 90 in the control board provided on the back side of the pachinko machine 1 by electrical wiring that penetrates the game board 80. The

  In the case of such a configuration, the second region 84b of the restraining member 84 expands when an illegal act is performed that changes the inclination of at least one of the adjustment nails 41a and 41b using a piano wire or the like. Then, since the strain of the metal resistance strain gauge 72 attached so as to include the second region 84b increases, it is possible to detect that an illegal act has been performed. Therefore, the fraud detection device for a pachinko machine according to the present embodiment has the same effects as the fraud detection device for a pachinko machine according to the first embodiment described above.

Figure 11 is a cross-sectional view showing adjustment nail 41a of the fraud detection unit of the pachinko machine as a third embodiment according to the present invention, 41b, the configuration of the restraining member 85 and the strain detection element 72. In FIG. 11, a pair of through-holes 86a and 86b having an inner diameter larger than the outer diameter of each adjustment nail 41a and 41b is formed in the synthetic resin restraining member 85. The adjustment nails 41a and 41b are inserted through the corresponding through holes 86a and 86b, and are placed on the bottom surface 82a of the recess 82 of the game board 80. The metal resistance strain gauge 72 extends between the adjustment nails 41a and 41b so that the x direction as the strain detection direction passes through the axes of the two adjustment nails 41a and 41b and substantially coincides with the direction perpendicular to both axes. It is attached to the restraining member 85 using an adhesive. In FIG. 11, illustration of electrical wiring to the metal resistance strain gauge 72 is omitted, but the metal resistance strain gauge 72 is controlled on the back side of the pachinko machine 1 by electrical wiring that penetrates the game board 80. It is connected to the strain detection circuit 90 in the substrate.

  Thus, since there is a gap around each adjustment nail 41a, 41b, nail adjustment for adjusting the winning rate by the pachinko parlor is possible within the range of the gap. Since the metal resistance strain gauge 72 detects when the inclination of the adjustment nails 41a and 41b is changed beyond the range allowed by the gap, an unauthorized operation can be determined. Therefore, the fraud detection device for a pachinko machine according to the present embodiment has the same effects as the fraud detection device for a pachinko machine according to the first embodiment described above.

12, among the pachinko machine 1 of the game board 20 comprises a fraud detection device according to a fourth embodiment of the present invention is a front view showing an enlarged start winning opening 40 near, 13, FIG. 14 is a right side view of a region in the vicinity of the start winning opening 40 shown in FIG. 12, and FIG. 14 is a cross-sectional view taken along the section line XIV-XIV in FIG.

  In the fourth embodiment, the shape of the gate portion 46 in the first embodiment shown in FIGS. 5 and 6 is changed. As shown in FIGS. 12 to 14, the gate portion includes a pair of side plates 101 a and 101 b erected from the base 44 and a front plate 102 covering the front side of the side plates 101 a and 101 b, and the front plate 102 has an adjustment nail. An extending portion 102a extending upward is provided so as to cover 41a and 41b. And a pair of recessed part 103a, 103b engaged with each of each adjustment nail 41a, 41b is formed in the back surface side of the extension part 102a. Therefore, the extending part 102a functions as a restraining member 102a that restricts the movement of the heads of the pair of adjusting nails 41a and 41b.

  As described above, in the present embodiment, when the adjustment nails 41a and 41b are tilted by an illegal act, the distance between the adjustment nails 41a and 41b becomes larger near the heads of the adjustment nails 41a and 41b. Since the restraining member 102a is provided, the strain generated in the restraining member 102a is larger than that in the first to third embodiments described above, and the movement of the game ball is not hindered. Therefore, in the present embodiment, although the restraining member 102a is in contact with the fraudster, the fraudulent act can be detected more accurately and reliably than in the first to third embodiments.

  The metal resistance strain gauge 72 is located between the adjustment nails 41a and 41b so that the x direction as the strain detection direction passes through the axes of the two adjustment nails 41a and 41b and substantially coincides with the direction perpendicular to both axes. In addition, it is attached to the extending portion 102a using an adhesive. In FIG. 12, the metal resistance strain gauge 72 is attached to the front side of the extending portion 102a, but may be attached to the back side. In FIG. 12, although the electrical wiring to the metal resistance strain gauge 72 is omitted, the metal resistance strain gauge 72 is composed of either the front plate 102, the side plates 101a and 101b, the base 44, the cell sheet 81, and The electrical wiring that penetrates the game board 80 is connected to the strain detection circuit 90 in the control board provided on the back side of the pachinko machine 1.

  Here, since the sizes of the recesses 101a and 101b are formed larger than the outer diameter of the heads of the adjustment nails 41a and 41b, there are gaps around the adjustment nails 41a and 41b in the restraining member 102a. Therefore, it is possible to adjust the nail for adjusting the winning rate by the pachinko parlor within the gap. Since the metal resistance strain gauge 72 detects when the inclination of the adjustment nails 41a and 41b is changed beyond the range allowed by the gap, an unauthorized operation can be determined. Therefore, the fraud detection device for a pachinko machine according to the present embodiment has the same effects as the fraud detection device for a pachinko machine according to the first embodiment described above. In the present embodiment, since the distortion of the restraint member does not occur within the range of the nail adjustment permitted by the gap, steps s2 and s3 are omitted from the flowchart shown in FIG. ε1 may be handled as 0.

  Each above-mentioned embodiment is only illustration of this invention, and can change a structure within the scope of the present invention. For example, a pair of left and right adjustment nails 41a, 41b, 51a, 51b, 54a, 54b, 57a, 57b, 60a, 60b immediately above the general winning openings 50, 53, 56, 59 and directly above the gates 62, 64 A restraining member and a metal resistance strain gauge 72 may be provided on each of the pair of left and right adjustment nails 63a, 63b, 65a, 65b. Also in this configuration, the metal resistance strain gauge 72 and the strain detection circuit 90 in the control board provided on the back side of the pachinko machine 1 are connected by electrical wiring (not shown) penetrating the game board 80, and the metal resistance Based on the output from the strain gauge 72, the strain of the restraining member is detected. In this way, a pair of left and right adjustment nails 41a, 41b, 51a, 51b, 54a, 54b, 57a, 57b, 60a, 60b, and the gates 62, 64 provided just above the general winning openings 50, 53, 56, 59 are provided. It is possible to detect whether an illegal act has been performed on the pair of right and left adjustment nails 63a, 63b, 65a, 65b.

  Further, in the strain detection circuit 90 shown in FIG. 8, for the sake of simplicity, the size of the first to third resistors 91 to 93 is the same as the resistance value R of the metal resistance strain gauge 72 when there is no strain. The sizes of the first to third resistors 91 to 93 may be R1, R2, and R3, respectively, and may have resistance values different from the resistance value R of the metal resistance strain gauge 72. If the resistance value is set and the relational expression of R1: R2 = R: R3 is satisfied, the output voltage ΔV of the Wheatstone bridge becomes 0 [V] when the metal resistance strain gauge 72 is not strained. When the strain ε is generated in the metal resistance strain gauge 72 and the resistance is increased by ΔR [Ω], the output voltage ΔV corresponding to the increase in the resistance is obtained, so that the magnitude of the strain is the same as in the case of FIG. Can be requested.

It is a front side perspective view showing an example of the whole composition of pachinko machine 1 concerning the present invention. It is a front view showing an example of composition of game board 20 of pachinko machine 1 concerning the present invention. It is explanatory drawing for demonstrating the principle of the strain detection element which concerns on this invention. It is a front view which shows an example of a structure of the distortion | strain detector based on this invention. It is a front view which expands and shows the start winning opening 40 vicinity area | region among the game boards 20 of the pachinko machine 1 provided with the fraud detection apparatus of 1st Embodiment on which this invention presupposes . FIG. 6 is a right side view of a region near the start winning opening 40 shown in FIG. 5. It is sectional drawing seen from the cut surface line VII-VII of FIG. It is a block diagram which shows the structure of the distortion detection circuit 90 in the fraud detection apparatus of the pachinko machine of this Embodiment. 9 is a flowchart showing a procedure for determining whether or not there is an illegal act by a microcomputer 98 in the distortion detection circuit 90 shown in FIG. It is sectional drawing which shows the structure of the adjustment nails 41a and 41b, the restraint member 84, and the distortion | strain detection element 72 which concern on the fraud detection apparatus of the pachinko machine which is 2nd Embodiment on which this invention is based . It is sectional drawing which shows the structure of the adjustment nails 41a and 41b, the restraint member 85, and the distortion | strain detection element 72 which concern on the fraud detection apparatus of the pachinko machine which is the 3rd Embodiment concerning this invention. It is a front view which expands and shows the start winning opening 40 vicinity among the game boards 20 of the pachinko machine 1 provided with the fraud detection apparatus which is 4th Embodiment which concerns on this invention. FIG. 13 is a right side view of a region near the start winning opening 40 shown in FIG. 12. It is sectional drawing seen from the cut surface line XIV-XIV of FIG.

Explanation of symbols

  1 Pachinko machine, 2 outer frame, 3 inner frame, 4 front door, 6 glass window, 20 game board, 21 game area, 40 start winning opening, 41a, 41b adjustment nail, 48 extra winning opening, 50 general winning opening, 41a, 41b, 51a, 51b, 54a, 54b, 57a, 57b, 60a, 60b Adjustment nail, 72 Metal resistance strain gauge, 83, 84, 85, 102a Restraining member, 90 Strain detection circuit

Claims (2)

In a pachinko machine having a game board, a winning opening provided in the gaming board, and two adjustment nails for adjusting a winning rate provided immediately above the winning opening,
A recess formed in the game board and having a bottom surface on which the two adjusting nails are driven;
A constraining member provided between the two adjusting nails and restraining the relative displacement of each adjusting nail;
A strain detecting element attached to the restraining member for detecting strain of the restraining member;
Based on the output from the strain detection element, and when the output satisfies a predetermined criterion, a determination means for outputting a signal for notification,
The restraining member is formed with a pair of through holes having an inner diameter larger than the outer diameter of each adjustment nail,
Each adjustment nail is provided through the pair of through holes ,
The restraining member, pachinko machine whose surface is characterized Rukoto provided in the recess so as to smoothly connect the surface of the game board. In a pachinko machine having a game board, a winning opening provided in the gaming board, and two adjustment nails for adjusting a winning rate provided immediately above the winning opening,
A constraining member provided between the two adjusting nails and restraining the relative displacement of each adjusting nail;
A strain detecting element attached to the restraining member for detecting strain of the restraining member;
Based on the output from the strain detection element, and when the output satisfies a predetermined criterion, a determination means for outputting a signal for notification,
The restraining member is formed with a pair of recesses larger than the outer diameter of the head of each adjustment nail,
Each pawl is provided by engaging the head with each of the pair of recesses.

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