JP5178556B2 - Medal game device - Google Patents

Description

  The present invention relates to a medal game device.

  A medal game device called a pusher type is known. The pusher-type medal game device includes a fixed table (medal placement table) provided at a position in the game space where the front end reaches above the medal drop opening, and an insertion hole (entrance / exit) of a housing provided behind the fixed table. ) And a pusher table (pushing member) that moves back and forth in the direction of the medal drop opening so as to slide on the upper surface of the fixed table. A large number of medals are placed on the upper surface of the fixed table and the upper surface of the pusher table. The gap between the upper surface of the fixed table and the lower surface of the pusher table is set smaller than the medal thickness, and the medal placed on the fixed table can be pushed by the front end surface of the pusher table.

  When the player inserts a new medal into the slot, the inserted medals or the same number of medals as the inserted medals are released into the game space and placed on the upper surface of the pusher table or fixed table. When the pusher table moves backward while sliding along the fixed table, the pusher table is retracted into the insertion hole (entrance / exit) of the housing. As the pusher table is retracted, medals placed on the rear side of the upper surface of the pusher table hit the end of the insertion hole and are pushed relatively forward. Then, the other medals placed on the upper surface of the pusher table were pushed forward one after another in a ball shape, and the medals placed on the front end side of the pusher table were fixed by the pusher table moving backward. Drop into an empty area on the top surface of the table. Next, when the pusher table slides on the fixed table and moves forward, the medal newly dropped on the fixed table is pushed forward by the front end surface of the pusher table. This time, the medals placed on the upper surface of the fixed table are successively pushed forward one after another. A part of the placed medals falls from the front end of the fixed table to the medal drop opening, and the dropped medals are paid out from the medal payout opening. In this way, the player enjoys how many medals can be paid out by inserting medals at an appropriate position at an appropriate timing.

  On the other hand, an operator who installs and operates a medal game device in a store desires a medal game device that makes the player feel attractive, and the number of medals paid out with respect to the number of medals inserted. I am interested in how the payout rate can be maintained at the desired target payout rate. In particular, in a medal game device in which a lottery device such as a jackpot lottery device is incorporated, if the probability of winning is high, an event may occur where the payout rate is close to 100% or exceeds 100%. If it is too low, the player may be avoided. Therefore, for example, as described in paragraph [0037] of Patent Document 1, a technique for changing the probability of winning in relation to the payout rate has been known.

JP 2007-275140 A

  However, the conventional method of changing the lottery probability is a simple control of switching to a predetermined low probability or a predetermined high probability depending on whether the payout rate is higher or lower than the desired target payout rate. Therefore, a skilled player or the like can detect how much the current lottery probability is, and if it is recognized that the player is in a low probability state, a situation in which the player cannot play with the medal game device may occur.

  In addition, since the lottery probability of the lottery apparatus has continued to fluctuate greatly, the operator may be worried that the target payout rate may not be set correctly. In particular, there are various factors involved in the payout rate. For example, the type of medal such as size and thickness, whether or not the game device is installed horizontally, the height and inclination of the edge portion installed at the end of the fixed table on the medal drop opening side, and the lottery device lottery A plurality of factors such as the installation position of the chucker portion for making the payout rate participate in the payout rate. For this reason, the operator side may have anxiety that the lottery probability of the lottery device may continue to fluctuate greatly due to the height and inclination of the edge portion installed by the operator.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to propose a new medal game apparatus that can automatically settle the probability variation of the lottery function.

The first invention for solving the above problems is:
When a medal (for example, medal M in FIG. 1) is inserted from an insertion port (for example, medal insertion port 21 in FIG. 1), a medal is released into the game space (for example, the game space GS in FIG. 1), and the game In the space, the pushing member (for example, the pusher table 12 in FIG. 1) periodically moves on the medal placement table (for example, the fixed table 11 in FIG. 1), and the medal drop opening (for example, from the end of the medal placement table) 1 is a medal game device (for example, medal game device 1000 in FIGS. 1 and 2) in which a medal is paid out by dropping a medal into the medal drop opening 4) of FIG.
A payout rate calculating means for calculating a payout rate from the inserted medals and the paid out medals (for example, the payout rate calculating unit 231 in FIG. 2 and step D1 in FIG. 17);
Lottery control means (for example, lottery unit 220 in FIG. 2, step C15 in FIG. 16) for performing a lottery according to a given lottery probability and controlling the release of a predetermined number of medals to the game space at the time of winning;
When a predetermined number of medals are inserted, every time a predetermined time elapses, when a medal is paid out, or when the lottery is won, the lottery probability is changed by a given change width. Change execution means (for example, lottery probability changing unit 221 in FIG. 2, steps C5 and C19 in FIG. 16);
Change width changing means for changing the change width based on a difference between a preset target payout rate and the payout rate calculated by the payout rate calculating means (for example, the change width changing section 222 in FIG. Steps B11 to B19)
Is a medal game device.

  According to the first aspect, when a predetermined number of medals are inserted (for example, one or two), every time a predetermined time elapses (for example, at intervals of 10 minutes or 15 minutes), a predetermined number of medals (for example, The lottery probability is changed by a given change width when it is paid out (1 or 10) or when the lottery is won. The lottery probability is not necessarily changed when a difference in the current payout rate with respect to the target payout rate occurs, such as when the current payout rate falls below or exceeds the target payout rate. This is an event that usually occurs / occurs in game play when a predetermined number of medals are inserted, every time a predetermined time elapses, when a predetermined number of medals are paid out, or when a lottery is won. Each time such an event occurs / occurs, the lottery probability is changed.

  The change range in which the lottery probability is changed is changed based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating means. Therefore, for example, by changing the lottery probability to be smaller if the current payout rate is close to the target payout rate and to be larger if the current payout rate is farther, fluctuations in which the lottery probability increases or decreases can be converged. The convergence speed can also be adjusted depending on how much the change width is set.

The second invention is a medal game device according to the first invention,
The medal game in which the change width changing means changes the change width using a change rate (for example, correction coefficients kα and kβ in FIG. 8) determined according to any of the current date, time, and day of the week. Device.

  There are various places where the medal game device is installed, and it is not always installed in a place where a constant utilization rate is expected regardless of the date and time. That is, the usage rate of the medal game device can change depending on whether it is a public holiday or weekday, whether it is daytime, evening or night. Therefore, according to the second invention, the change range for changing the lottery probability is changed using the change rate determined according to any of the current date, time, and day of the week. For example, it is possible to intentionally adjust the easiness of winning by making the change range larger on Saturdays and Sundays than on weekdays.

The third invention is a medal game device according to the first or second invention,
Each time the change execution means inserts a predetermined number of medals, the medal insertion time change means (for example, the lottery probability change unit 221 in FIG. Step C5) of FIG.
The change width changing unit changes the input change unit width based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating unit (for example, FIG. 2). The change width changing unit 222 and steps B11 to B19) of FIG.
This is a medal game device.

  According to the third aspect of the invention, every time a predetermined number of medals are inserted, the lottery probability is increased and changed by a given change unit width at the time of insertion. Accordingly, the lottery probability gradually increases as medals are inserted. However, the change unit width at the time of insertion is changed based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating means.

  Then, as in the fourth aspect of the invention, the change unit width change unit at the time of insertion increases the change unit width at the time of insertion as the payout rate calculated by the payout rate calculation unit is smaller than the target payout rate. You may change (for example, the change width standard value table 321 of FIG. 2).

  According to the fourth aspect of the invention, the smaller the current payout rate is from the target payout rate, the larger the change unit width at the time of insertion. The change unit width at the time of insertion is an increase width of the lottery probability that is changed every time a medal is inserted. Therefore, for example, when the current payout rate is very small from the target payout rate, the change unit width at the time of insertion is in a large state, and the payout rate increases every time a predetermined number of medals are inserted, and the input becomes closer to the target payout rate. The time change unit width becomes smaller. For this reason, the fluctuation of the lottery probability converges.

A fifth invention is a medal game device according to any one of the first to fourth inventions,
When the lottery wins, the change execution means decreases and changes the lottery probability by a given winning change unit width (for example, the lottery probability changing unit 221 in FIG. 2, FIG. 16). Step C19)
The winning change unit width changing means (for example, FIG. 2), wherein the changing width changing means changes the winning change unit width based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating means. The change width changing unit 222 and steps B11 to B19) of FIG.
This is a medal game device.

  According to the fifth aspect of the invention, every time a lottery wins, the lottery probability is reduced and changed by a given change unit width at the time of winning. Accordingly, the lottery probability is gradually reduced as winning is generated. However, the winning change unit width is changed based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating means.

  Then, as in the sixth invention, the winning change unit width changing means increases the winning change unit width as the payout rate calculated by the payout rate calculating means is larger than the target payout rate. You may change (for example, the change width standard value table 321 of FIG. 2).

  According to the sixth aspect of the present invention, the winning change unit width increases as the current payout rate is larger than the target payout rate. The change unit width at the time of winning is a reduction range of the lottery probability that is changed and decreased every time the lottery is won. Therefore, for example, when the current payout rate is much larger than the target payout rate, the change unit width at the time of winning is in a large state, and the winning change unit width becomes closer to the target payout rate as the payout rate decreases each time the winning is made. Get smaller. For this reason, the fluctuation of the lottery probability converges.

A seventh invention is a medal game device according to any one of the first to sixth inventions,
The change execution means has payout change means (for example, a lottery probability change unit 221 in FIG. 2) for reducing and changing the lottery probability by a given payout change unit width every time a predetermined number of medals are paid out. And
The change width changing means changes the payout change unit width based on the difference between the target payout rate and the payout rate calculated by the payout rate calculation means (for example, FIG. 2). A change width change unit 222),
This is a medal game device.

  According to the seventh aspect, every time a predetermined number of medals are paid out, the lottery probability is reduced and changed by a given changing unit width at the time of payout. Therefore, the lottery probability gradually decreases as the medals are paid out. However, the change unit width at the time of payout is changed based on the difference between the target payout rate and the payout rate calculated by the payout rate calculating means.

  As in the eighth invention, the payout change unit width changing means increases the payout change unit width as the payout rate calculated by the payout rate calculation means is larger than the target payout rate. It may be changed.

  According to the eighth aspect, the payout change unit width increases as the current payout rate is larger than the target payout rate. The change unit width at the time of payout is a reduction range of the lottery probability that is changed and decreased every time a predetermined number of medals are paid out. Therefore, for example, when the current payout rate is much larger than the target payout rate, the change unit width at the time of payout is in a large state, and every time a medal is paid out, the payout rate decreases and approaches the target payout rate. The width becomes smaller. For this reason, the fluctuation of the lottery probability converges.

A ninth invention is a medal game device according to any one of the first to eighth inventions,
It is a medal game device provided with a manual changing means (for example, the lottery probability changing unit 221 in FIG. 2 and step B5 in FIG. 15) for manually changing the lottery probability.

  According to the ninth aspect, the lottery probability can be manually changed. As described above, according to the first to eighth inventions, the fluctuation of the lottery probability that increases or decreases the lottery probability is automatically converged halfway. Therefore, even if the operator side of the medal game device manually changes the lottery probability, the fluctuation of the lottery probability will automatically converge. Therefore, for example, even if the operator increases the lottery probability on a specific day labeled “Service Day”, the fluctuation of the lottery probability is automatically converged by the subsequent operation. There is no.

The tenth invention is a medal game device according to any one of the first to ninth inventions,
Change permission / rejection setting means (for example, the processing unit 200 in FIG. 2) for setting permission / inhibition of change by the change execution means;
The change execution means performs the change of the lottery probability when the change is set to be permitted, and does not change the lottery probability changed last when the change is set to be not permitted.
This is a medal game device.

  According to the tenth aspect, the operator can set whether or not to change the lottery probability. For example, if the operator decides that the desired payout rate has been settled and wants to prevent the lottery probability from being changed unnecessarily, the last change is made by setting the change in the lottery probability to non-permitted. It is possible to prevent the lottery probability from being changed.

The external view of the medal game device in an embodiment. The function block diagram of a medal game device. The data structural example of medal count data. The data structural example of lottery probability fluctuation data. Data configuration example of change width data. The data structural example of lottery probability change data. The data structural example of a change width standard value table. The data structural example of a change width correction coefficient table. The data structural example of operation log | history DB. The example of a lottery probability history screen which displayed the fluctuation of the lottery probability in the form of a graph. An example of a lottery probability history screen displaying the variation of the lottery probability in a table format. An example of a lottery probability history screen displaying the transition of the lottery probability in a graph format. An example of a lottery probability history screen displaying the transition of the lottery probability in a table format. The flowchart of a control process. The flowchart of the initial setting process performed during control processing. The flowchart of the lottery probability change process performed during a control process. The flowchart of the performance total process performed during a control process. The flowchart of the lottery probability display process displayed during a performance total process.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the applicable embodiment of the present invention is not limited to this.
[Overview]
FIG. 1 is a front overview diagram showing an example of the medal game device 1000 in the present embodiment. This medal game device 1000 forms a game space (game space) GS surrounded by a transparent cover glass 2, and a fixed table (medal) whose front end is installed above the medal drop opening 4 in the game space GS. A so-called “pusher type” provided with a mounting table) 11 and a pusher table (extrusion member) 12 extending along the upper surface of the fixed table 11 and periodically reciprocating along the upper surface. It has the structure called.

  In this medal game device 1000, the player has a case in which a large number of medals M are placed in front of the fixed table 11 and the pusher table 12 by the operator (operator) of the medal game device 1000 before the game starts. The medals M are inserted into the medal insertion slot 21 opened on the operation table extended in the front portion to play.

  When the player inserts the medal M into the medal slot 21, the passage sensor 31 provided in the vicinity of the medal slot 21 detects the passage of the medal M. The medal M is accommodated in the medal accommodating portion 12 through a passage communicating from the medal insertion slot 21 to a medal accommodating portion (not shown).

  The passage sensor 31 is a means for detecting the passage of an object. For example, the light projecting element and the light receiving element are arranged to face each other and detect the passage of the object by shading, or measure the distance from the reflection time of the ultrasonic wave. This can be realized by a distance sensor or the like. Alternatively, a swing switch that swings in contact with a passing object may be used.

  When the passage of the medal M is detected, the same number of medals M inserted into the medal insertion slot 21 are stored in the medal storage unit 26 provided in the ceiling portion of the game space GS by a known transport mechanism (not shown). Immediately after the medal M stored in the medal storage unit 26 passes the detection of the medal M by the passage sensor 31, the same number of medals M are ejected from the medal ejection device 27.

  The medal M ejected from the medal ejection device 27 is dropped and inserted into the game space GS from the medal ejection port 22. The medal M inserted into the game space GS is between the game board 14 and the transparent cover glass 2 arranged in parallel with the game board 14 at a distance slightly longer than the thickness of the medal M on the front surface of the game board 14. Then, it flows down while hitting the nail 15 standing upright, and eventually falls on the upper surface of the pusher table 12.

  The pusher table 12 is placed so as to be slidable along the front surface of the fixed table 11, and is erected in the back of the game space GS by a known reciprocating mechanism (not shown) installed in the housing. A reciprocating motion is periodically performed in the front-rear direction so as to enter and exit from the insertion hole 6 opened at the lower end of the game board 14.

  When the pusher table 12 moves backward (retreats) so as to slide on the fixed table 11, the medal M placed on the upper surface of the pusher table 12 moves together while being placed. When the pusher table 12 is pulled back into the insertion hole 6 as it moves backward, the extension length of the pusher table 12 is shortened by the amount of backward movement, and the medal M placed on the rear surface of the pusher table 12 is inserted into the insertion hole. It hits the periphery of 6, and it becomes the appearance pushed relatively forward. Then, the other medals M placed on the rear of the upper surface of the pusher table 12 are also pushed forward in a chain shape, and finally the medals M placed on the front end side fall on the fixed table 11.

  Thereafter, as the pusher table 12 advances (extrusion operation), its front end surface functions as an extruding portion, and the medal M dropped on the upper surface of the fixed table 11 and placed on the fixed table 11 is pushed forward. . This time, the medal M placed on the fixed table 11 is pushed forward in the shape of a ball.

  An inclined portion 13 that is inclined forward and upward is provided at the front end portion (tip portion) of the fixed table 11. The medal M that reaches the front end portion of the fixed table 11 and is pushed forward climbs along the inclined portion 13. In the meantime, the medal M is inclined with respect to the front of the fixed table 11 and further pushed forward. Then, when it reaches the inclination of the inclined portion 13, it falls to the medal drop opening 4.

  The inclined portion 13 is provided with a variable inclination angle. By changing the inclination angle of the inclined portion 13, the ease of dropping the medal M from the front end portion of the fixed table 11 changes, and the payout rate of the medal M can be adjusted. It should be noted that the adjustment of the inclination of the inclined portion 13 can be performed on the operator side of the medal game device 1000.

  The lower part of the medal drop opening 4 communicates with a passage 25 provided with a passage sensor 32 that detects the passage of the dropped medal M. The medal M that has fallen into the medal drop opening 4 is accommodated in the medal accommodating portion 24 through the passage 25. Then, the medals M accommodated in the medal accommodating portion 24 by the same number of medals M detected when passing through the passage 25 are conveyed to the medal payout outlet 41 by a known conveying mechanism (not shown), It is paid out to the tray 42.

  Further, the fixed table 11 is set so that the width of the front end, that is, the falling end is wider than the width of the pusher table 12 and widens from the vicinity of the advance limit position of the pusher table 12 to the left and right. Then, side medal drop openings 23 into which medals M can enter are respectively provided in the left and right side wall portions of the widened portion. It is separately collected in another accommodating part (not shown).

  Further, the medal game device 1000 has a lottery function, and when a special bonus is won in the lottery, a bonus medal M is supplied from the special payout outlet 29 onto the pusher table 12 as a privilege. The lottery process is triggered by the fact that the medal M comes into contact with the retractable chucker portion 17 provided so as to protrude from the inclined portion 13 to the medal drop opening 14 and the passage of the medal M is detected. The chucker unit 17 is not limited to a retractable mechanism, and may be another known chucker mechanism. In the present embodiment, the position and number of the chucker portions 17 can be arbitrarily adjusted by the operator. In the lottery process, “win” or “off” is determined according to a predetermined lottery probability. When the lottery result is “winning”, a predetermined number of bonus medals are supplied from the special payout exit 29 onto the pusher table 12 as a privilege. At the same time, a winning effect process such as displaying a predetermined winning screen on the game monitor 16 provided in the center of the game board 14 or outputting a predetermined winning sound from the speaker is performed.

  The medal game apparatus 1000 includes a control unit 50 that controls the apparatus in an integrated manner. The control unit 50 is equipped with an arithmetic device such as a CPU 51 and a storage device such as an IC memory 52. The arithmetic device reads out and executes programs, data, and the like stored in the storage device, thereby controlling the medal game device 1000 in an integrated manner, driving control of the pusher table 12 and various medal transport mechanisms, and the game board 14 are provided. Various processes such as display control of the game monitor 16 and a lottery process are executed.

In addition, the medal game device 1000 includes a switch group 63 and an operation monitor 62 that are operation devices in the interior of the housing and behind the door 61 provided on the front surface of the housing. Normally, the door 61 is locked, and only the operator can unlock it and use the internal management device 400. For example, the operator opens the door 61 outside the business hours and operates the switch group 63 to display a desired target payout rate change / setting, manual setting of the lottery probability, and lottery probability history on the management monitor 62. You can make it.
[Function configuration]
FIG. 2 is a functional configuration diagram of the medal game device 1000. The medal game device 1000 functionally includes a medal insertion detection unit 110, a medal payout detection unit 120, an operation input unit 410, an operation display unit 420, a communication unit 130, an image display unit 140, A sound output unit 150, a processing unit 200, and a storage unit 300 are provided. The management input unit 410 and the management display unit 420 are management devices 400 that can only be used for maintenance by the operator of the medal game apparatus 1000, and are provided in a place where the user cannot use, for example, in a housing. It has been.

  The medal insertion detection unit 110 detects medals inserted into the medal game device 1000 in units of one, and outputs an insertion detection signal to the processing unit 200. In FIG. 1, the passage sensor 31 corresponds to this.

  The medal payout detection unit 120 detects medals paid out from the medal game device 1000 to the outside of the device, and outputs a payout detection signal to the processing unit 200. In FIG. 1, the passage sensor 32 corresponds to this.

  The management input unit 410 receives an operation input by the administrator of the medal game device 1000 and outputs an operation signal corresponding to the operation to the processing unit 200. This function is realized by an input device such as a push button or a touch panel. In FIG. 1, the switch group 63 corresponds to this. The operation input unit 410 is used to input a target payout rate setting instruction, a lottery probability display instruction, and the like by the administrator.

  The management display unit 420 displays an image according to a display signal from the processing unit 200 (mainly the lottery probability display control unit 240). This function is realized by a display device such as an LCD. In FIG. 1, the operation monitor 62 corresponds to this.

  Based on the program and data read from the storage unit 300, the operation signal input from the operation input unit 410, the detection signal input from the medal insertion detection unit 110 and the medal payout detection unit 120, and the like. Various arithmetic processes such as overall control of the game apparatus 1000, game progress, and image generation are performed. This function is realized by, for example, a microprocessor such as a CPU or GPU, an ASIC (Application Specific Integrated Circuit), an IC memory, or the like. In FIG. 1, the CPU 51 mounted on the control unit 50 corresponds to this. In addition, the processing unit 200 includes a medal counting unit 210, a lottery unit 220, a result totaling unit 230, a lottery probability display control unit 240, a drive control unit 250, an image generation unit 260, and a sound generation unit 270. Have.

  The medal counting unit 210 measures the number of inserted medals and the number of paid out medals in the medal game apparatus 1000. Specifically, the number of inserted medals and the number of paid out medals are counted based on detection signals from the medal insertion detecting unit 110 and the medal payout detecting unit 120.

  Data on the number of inserted medals and the number of paid out medals are stored in the medal counting data 344. FIG. 3 is a diagram illustrating an example of the data configuration of the medal count data 344. The medal count data 344 stores a current medal insertion number 344a and a payout number 344b.

  The lottery unit 220 determines “win” or “miss” according to a predetermined lottery probability at a timing when the passage of the medal M is detected by the chucker unit 17. If the lottery result is determined as “winning”, a predetermined number of bonus medals are supplied to the game space as a privilege. The lottery probability is appropriately changed by the lottery probability changing unit 221 and is not a fixed value.

  Here, data on the lottery probability is stored in the lottery probability fluctuation data 343. FIG. 4 is a diagram illustrating an example of a data configuration of the lottery probability variation data 343. As illustrated in FIG. The lottery probability fluctuation data 343 stores a current value 343a of the lottery probability, today's start value 343b, a maximum value 343c, and a minimum value 343d.

  The start value of today's lottery probability is the end value of the previous day's lottery probability, but can also be manually set by the operator. When the start value of the lottery probability is manually set by the operator, the manual setting flag is set to “1”. That is, the lottery unit 220 refers to the lottery probability variation data 343 and performs lottery using the stored current value of the lottery probability.

  The lottery unit 220 includes a lottery probability changing unit 221 that changes the lottery probability, and a change width changing unit 222 that sets a change range of the lottery probability. The lottery probability changing unit 221 changes the lottery probability when a predetermined change condition is satisfied. The changing conditions are (1) medal insertion and (2) the lottery result is “winning”. That is, the lottery probability changing unit 221 increases (increases) the lottery probability by a predetermined increase change width α every time the medal insertion detecting unit 110 detects the insertion of a medal. Further, every time the lottery result by the lottery unit 220 becomes “winning”, the lottery probability is lowered (decreased) by a predetermined decrease change width β.

  Here, the data regarding the change widths α and β of the lottery probability is stored in the change width data 341. FIG. 5 is a diagram illustrating an example of a data configuration of the change width data 341. The change width data 341 stores an increase change width 341b and a decrease change width 341c in association with each other for each time period 341a obtained by dividing one day. The change widths α and β are changed / set by the change width changing unit 222.

  The lottery probability history data changed by the lottery probability changing unit 221 is stored in the lottery probability changing data 342. FIG. 6 is a diagram illustrating an example of the data configuration of the lottery probability change data 342. The lottery probability change data 342 stores the lottery probability 342b after the change in association with each time 342a when the lottery probability is changed along the time series.

  The change width changing unit 222 sets the change widths α and β of the lottery probability. Specifically, first, a difference ΔP between the target value and actual value of the payout rate is calculated. Here, the target value of the payout rate is a value preset by the administrator, and is stored as the target payout rate data 323. The actual value of the payout rate is a value based on the payout rate so far, and can be, for example, the payout rate of the previous day itself, or the average value of the payout rates for the past predetermined days (for example, 7 days). Note that the payout rate is calculated by the payout rate calculation unit 231 after, for example, the end of business.

  Next, based on the difference ΔP of the payout rate, standard values Nα and Nβ of the lottery probability change widths α and β are obtained according to the change width standard value table 321. Further, according to the change width correction coefficient table 322, correction coefficients kα and kβ for the change widths α and β of the lottery probability are obtained. Then, today's lottery probability change widths α and β are determined from the obtained standard values Nα and Nβ and correction coefficients kα and kβ. The change widths α and β are given by the following equations (1a) and (1b).

Change width α = standard value Nα × correction coefficient kα (1a)
Change width β = standard value Nβ × correction coefficient kβ (1b)
FIG. 7 is a diagram illustrating an example of a data configuration of the change width standard value table 321. The change width standard value table 321 stores the standard value 321b of the increase change width α and the standard value 321c of the decrease change width β in association with each other for each payout rate difference 321a.

  In the figure, the standard value Nα of the increase change width α is determined so as to increase as the actual value of the payout rate is smaller than the target value. This is because, when the actual value of the payout rate is smaller than the target value, the increase change width α of the lottery probability is increased by increasing the standard value Nα as the payout rate difference ΔP increases, and the payout rate is quickly increased. This is because the actual value of the payout rate is larger than the target value. On the other hand, when the payout rate difference ΔP is larger, the standard value Nα is decreased to decrease the increase change width α. This is because the payout rate is not so far from the target value.

  Further, the standard value of the decrease change width β is determined so as to increase as the actual value of the payout rate is larger than the target value. This is because, when the actual value of the payout rate is smaller than the target value, the standard value Nβ is decreased as the payout rate difference ΔP is increased to decrease the lottery probability decrease change width β, and the payout rate is the target value. In contrast, when the actual value of the payout rate is larger than the target value, the decrease change width β is set by increasing the standard value Nβ as the payout rate difference ΔP increases. This is to increase the payout rate so that it quickly approaches the target value.

  FIG. 8 is a diagram illustrating an example of a data configuration of the change width correction coefficient table 322. The change width correction coefficient table 322 stores an application condition 322b, an applied time zone 322c, a correction coefficient 322d for the increase change width α, and a correction coefficient 322e for the decrease change width β in association with the priority order 322a. ing. In the application condition 322b, conditions for date and day of the week are defined.

  That is, the change width changing unit 222 applies the correction coefficients kα and kβ determined for each time zone corresponding to the application condition with the highest priority among the application conditions satisfied by today's date and day of the week. Value. For example, if today is “December 20 (Sat)”, the priority will satisfy the “2” application condition, and the correction coefficient kα will be “1.4” until 12:00 today. As the coefficient kβ, “1.4” is applied, and after 12:00, the correction coefficient kα is “1.0”, and the correction coefficient kβ is “1.0”.

  The operation result totaling unit 230 totals the operation results for today at a predetermined timing, for example, after the end of business hours. Specifically, today's operation history data 331 is generated based on today's performance data 340 and added to the operation history DB 330.

  FIG. 9 is a diagram illustrating an example of a data configuration of the operation history DB 330. The operation history DB 330 includes a plurality of operation history data 331 for each day, and each of the operation history data 331, together with the corresponding date 331a, lottery probability change history data 332, lottery probability fluctuation history data 333, A lottery probability manual setting flag 334, change width history data 335, medal count history data 336, and payout rate history data 337 are stored.

  The lottery probability change history data 332 is a change history of the lottery probability on the day, and stores the lottery probability 332b after the change in association with each time 332a when the lottery probability is changed.

  The lottery probability fluctuation history data 333 is the lottery probability fluctuation history of the day, and the lottery probability start value 333a, end value 333b, maximum value 333c, minimum value 333d, intermediate value 333e, and fluctuation range 333f. And store.

  The manual setting flag 334 is a flag indicating whether or not the start value of the lottery probability for the day has been manually set by the administrator.

  The change width history data 335 stores an increase change width 335b and a decrease change width 335c in association with each other for the time zone 335a of the day.

  The medal count history data 336 stores a medal insertion number 336a and a payout number 336b of the day.

  The payout rate history data 337 stores a payout rate 337a of the day and an appropriate flag 337b. The appropriate flag 337b is a flag indicating whether or not the payout rate of the day is appropriate for the target payout rate. Since the payout rate can be calculated from the medal count history data 336, only the medal count history data 336 may be recorded and may be calculated as necessary. Similarly, the appropriate flag 337b can also be determined based on the payout rate calculated from the medal counting history data 336. Therefore, the appropriate flag 337b may not be recorded as a configuration to be calculated as necessary.

That is, the result totaling unit 230 generates the lottery probability fluctuation history data 333 based on the lottery probability fluctuation data 343. That is, the current value of the lottery probability is set as the end value of today's lottery probability. Also, an intermediate value of today's lottery probability is calculated from today's maximum and minimum values. The intermediate value of the lottery probability is given by the following formula (2), which can be an average value: intermediate value = (maximum value + minimum value) / 2 (2)
Also, the fluctuation range of today's lottery probability is calculated from the maximum value and the minimum value. The fluctuation range of the lottery probability is given by the following equation (3).

Fluctuation range = maximum value-minimum value (3)
The result totaling unit 230 sets the lottery probability change data 342 as the lottery probability change history data 332 and the change width data 341 as the change width history data 335.

  In addition, the result totaling unit 230 includes a payout rate calculation unit 231. The payout rate calculation unit 231 calculates today's payout rate based on the medal count data 344 to generate payout rate history data 337, and uses the medal count data 344 as medal count history data 336. That is, with reference to the medal count data 344, today's payout rate is calculated from the medal insertion number and medal payout number. The payout rate is given by the following equation (4).

Payout rate = number of payouts / number of inserts (4)
Next, it is determined whether or not the calculated payout rate is appropriate for the target payout rate. That is, the determination is made based on whether or not the calculated payout rate is within a predetermined appropriate range (for example, ± 3%) based on the target payout rate.

  The lottery probability display control unit 240 displays a lottery probability history screen displaying a lottery probability history on the operation display unit 420 based on the operation history DB 330 in accordance with an input instruction from the operation input unit 410. Specifically, as the display type of the lottery probability history, “variation display” that displays the fluctuation of the lottery probability on the target day, and “transition display” that displays the transition of the fluctuation range of the lottery probability for each unit period. There are two types. In addition, there are two types of display formats: a “graph format” in which the lottery probability is graphed, and a “table format” in which a list is displayed numerically.

  10 to 13 are diagrams illustrating an example of the lottery probability history screen. FIG. 10 is an example of a lottery probability history screen (lottery probability variation screen) whose display type is “variation display”, and shows a screen in which the display format is “graph format”. In the graph lottery probability fluctuation screen, the horizontal axis represents time and the vertical axis represents the lottery probability, and the lottery probability on the target day (December 10, 2008 in the figure) is linked to the lottery probability at each time. It is displayed as a line graph. In addition, an intermediate value of the lottery probabilities on the target day is displayed with a one-dot chain line. Furthermore, the time corresponding to the maximum value and the minimum value of the lottery probability on the target day is indicated by marks S1 and S2, and the time when the change widths α and β of the lottery probability are changed is indicated by mark S3.

  Note that the target date can be changed by selecting the day change button R1, and the screen for the changed target date can be switched. Further, by selecting the display format switching button R2, it is possible to switch to a screen (see FIG. 11) in which the display format is changed to “table format”. Further, by selecting the display type switching button R3, it is possible to switch to a screen (see FIG. 12) in which the display type is changed to “transition display”.

  FIG. 11 is a diagram showing an example of the lottery probability variation screen with the display format “table format”, and corresponds to a screen in which the lottery probability variation screen shown in FIG. 10 is displayed in a table format. On the lottery probability fluctuation screen in the form of a table, a list in which the fluctuation of the lottery probability on the target date (December 10, 2008 in the figure) is associated with the changed lottery probability for each time when the lottery probability is changed. It is displayed as. As remarks, the start value and end value of the lottery probability on the target date, the maximum value, the minimum value, the timing when the change widths α and β are changed, and the like are displayed in association with the time.

  Also in this screen, the target date can be changed by selecting the day change button R1, and the screen can be switched to the screen for the changed target date. Further, by selecting the display format switching button R4, it is possible to switch to a screen (see FIG. 10) in which the display format is changed to “graph format”. Further, by selecting the display type switching button R3, it is possible to switch to a screen (see FIG. 13) in which the display type is changed to “transition display”.

  FIG. 12 is a diagram showing an example of a lottery probability history screen (lottery probability transition screen) whose display type is “transition display”, and shows a screen in which the display format is “graph format”. In the lottery probability transition screen in the graph format, the horizontal axis represents the unit period, and the vertical axis represents the lottery probability. The lottery probability for each unit period (one day in the figure) in the target period (December 2008 in the figure). The transition of the fluctuation range is displayed by arranging vertically long bar-shaped figures F representing the fluctuation range of the lottery probability for each unit period in time series. Further, a line graph connecting intermediate values (average values) of lottery probabilities in each unit period is also displayed.

  In this figure F, the maximum value of the lottery probability in the corresponding unit period is set as the upper side position, and the minimum value is set as the lower side position. That is, the length of the figure F in the vertical direction represents the fluctuation range of the lottery probability in the corresponding unit period. Further, among the figures F of each unit period, a figure F1 in a period when the payout rate is appropriate and a figure F2 in a period in which the lottery probability is manually set by the operator are identified and displayed.

  Note that the target period can be changed by selecting the target period change button R5, and the screen can be switched to the screen for the changed target period. Further, by selecting the display format switching button R6, it is possible to switch to a screen (see FIG. 13) in which the display format is changed to “table format”. Further, by selecting the display type switching button R7, it is possible to switch to a screen (see FIG. 10) in which the display type is changed to “variable display”.

  In the lottery probability transition screen shown in FIG. 12, the target period is set to one month and the unit period is set to one day. However, the target period can be set to other periods (for example, one year).

  If the target period is one year, the unit period is one month.

  FIG. 13 is a diagram showing an example of a lottery probability transition screen with the display format “table format”, and corresponds to a screen displaying the lottery probability transition screen shown in FIG. 12 in a table format. On the lottery probability transition screen in the tabular format, the transition of the lottery probability for each unit period (one day in the figure) in the target period (December 2008 in the figure), the maximum value of the lottery probability for each unit period, It is displayed as a list in which minimum values, intermediate values, and fluctuation ranges are associated with each other. Further, as a remark, a unit period in which the payout rate is appropriate and a unit period in which the lottery probability is manually set by the operator are displayed.

  Also in this screen, the target period can be changed by selecting the target period change button R5, and the screen can be switched to the screen for the changed target period. Further, by selecting the display format switching button R8, it is possible to switch to a screen (see FIG. 12) in which the display format is changed to “graph format”. Further, by selecting the display type change button R7, it is possible to switch to a screen (see FIG. 11) in which the display type is changed to “variable display”.

  The lottery probability display control unit 240 first determines the display type (variation / transition display) and display format (graph / table format) of the lottery probability according to the input instruction from the operation input unit 410. If “variation display” is determined as the display type, the target date is determined in accordance with the input instruction from the operation input unit 410. Next, with reference to the operation history DB 330 (specifically, operation history data 331 on the target day), the fluctuation of the lottery probability on the target day is displayed on the operation display unit 420 on a screen corresponding to the determined display format. Specifically, if the display format is “graph format”, the screen shown in FIG. 10 is displayed. If the display format is “table format”, the screen shown in FIG. 11 is displayed.

  If “transition display” is determined as the display type, the target period (year / month) is determined according to the input instruction from the operation input unit 410. Next, with reference to the operation history DB 330, a fluctuation range for each unit period in the target period is calculated. That is, if the target period is “1 month”, the unit period is “1 day”, and the fluctuation range of the lottery probability of each day in the month set as the target period is set as the fluctuation range of the lottery probability of each unit period. On the other hand, if the target period is “1 year”, the unit period is “1 month”, and the fluctuation range of the lottery probability of each month as the unit period is calculated from the lottery probability of each day in the target period. That is, for each month in the year set as the target period, the largest value and the smallest value are extracted from the lottery probabilities for each day of the month, and the maximum and minimum values for the month are selected. Next, based on the maximum value and the minimum value of the month, an intermediate value and a fluctuation range of the lottery probability for the month are calculated.

  Then, the transition of the fluctuation range of the lottery probability for each unit period in the target period is displayed on the management display unit 420 on a screen corresponding to the determined display format. Specifically, if the display format is “graph format”, the screen shown in FIG. 12 is displayed. If the display format is “table format”, the screen shown in FIG. 13 is displayed.

  Returning to FIG. 2, the drive control unit 250 controls the drive of each mechanism unit of the medal game device 1000 such as the pusher table 12 and various medal transport devices according to the drive instruction of the processing unit 200.

  The image generation unit 260 is realized by a processor such as a GPU (Graphics Processing Unit) or a digital signal processor (DSP), a program such as a video signal IC or a video codec, a drawing frame IC memory such as a frame buffer, or the like. The image generation unit 260 generates a game image based on the processing result by the processing unit 200 and outputs an image signal of the generated game image to the image display unit 140.

  The image display unit 140 displays a game screen based on the image signal from the image generation unit 260. This function is realized by a display device such as a CRT, LCD, ELD, or PDP. In FIG. 1, the game monitor 16 corresponds to this.

  The sound generation unit 270 is realized by, for example, a processor such as a digital signal processor (DSP) or a voice synthesis IC, or an audio codec that can reproduce an audio file. Based on the processing result of the processing unit 200, sound effects and BGM, Sound signals of various operation sounds are generated and output to the sound output unit 150.

  The sound output unit 150 outputs game sounds such as BGM and sound effects based on the sound signal input from the sound generation unit 270. This function is realized by an audio output device such as a speaker.

  The communication unit 130 is connected to a given communication line to realize communication with an external device. This function is realized by, for example, a wireless communication device, a modem, a TA (terminal adapter), a wired communication cable jack, a control circuit, or the like.

  The storage unit 300 stores a system program for realizing various functions for causing the processing unit 200 to control the medal game apparatus 1000 in an integrated manner, a game program necessary for executing the game, various data, and the like. Further, it is used as a work area of the processing unit 200, and temporarily stores calculation results executed by the processing unit 200 according to various programs, input data input from the operation input unit 410, and the like. This function is realized by, for example, an IC memory such as a RAM and a ROM, a magnetic disk such as a hard disk, and an optical disk such as a CD-ROM and DVD. In FIG. 1, the IC memory 52 mounted on the control unit 50 corresponds to this.

In the present embodiment, the storage unit 300 stores a control program 310 as a program, and as data, a change width standard value table 321, a change width correction coefficient table 322, an operation history DB 330, and target payout rate data. 323 and today's performance data 340 are stored. The actual result data 340 includes change width data 341, lottery probability change data 342, lottery probability fluctuation data 343, medal count data 344, and a manual setting flag 345.
[Process flow]
FIG. 14 is a flowchart for explaining control processing in the medal game device 1000. However, it is assumed that the medal game device 1000 is operated so that the power is turned on before the installation store starts business and the power is shut off when the business is finished. The control process is started by the processing unit 200 when the medal game apparatus 1000 is powered on.

  In the control process, first, an initial setting process is performed (step A1).

  FIG. 15 is a flowchart for explaining the initial setting process. In the initial setting process, first, the medal counting unit 210 clears the number of inserted medals and the number of paid out medals to zero (step B1). Further, based on the presence / absence of an instruction input from the operation input unit 410, it is determined whether to manually set the lottery probability. If manually set (step B3: YES), the lottery probability changing unit 221 sets the instructed lottery probability as the start value of today's lottery probability in accordance with the instruction input from the operation input unit 410 (step B5). On the other hand, if not manually set (step B3: NO), the operation history DB 330 is referred to, and the end value of the lottery probability of the previous day is set as the start value of today's lottery probability (step B7).

  Next, the start value of the lottery probability is set as the maximum value and the minimum value of today's lottery probability (step B9).

  In addition, the change width change unit 222 determines the change widths α and β of today's lottery probability. That is, referring to the operation history DB 330, the actual value of the payout rate is calculated (step B11). For example, the average value of the previous day's payout rate and the past payout rate for a predetermined number of days (for example, 7 days) is set as the actual value of the payout rate. Next, a difference ΔP between the target value of the payout rate and the calculated actual value is calculated (step B13). Based on the difference ΔP of the payout rate, the change width α, Standard values Nα and Nβ of β are determined (step B15). Further, the correction coefficients kα and kβ for the change widths α and β are determined with reference to the change width correction coefficient table 322 (step B17). Then, for each of the change widths α and β, the standard value N is multiplied by the correction coefficient k to determine the initial change widths α and β of today's lottery probability (step B19). When the above processing is performed, the initial setting processing is terminated.

  When the initial setting process is completed, the process returns to FIG. 14, and the lottery probability changing unit 221 starts the lottery probability changing process (step A3). At the same time, the drive control unit 250 starts the drive process (step A5).

  FIG. 16 is a flowchart for explaining the lottery probability changing process. In the lottery probability changing process, when a medal insertion is detected by the medal insertion detection unit 110 (step C1: YES), the medal counting unit 210 increases the number of medal insertions by “1” (step C3). At the same time, the lottery probability changing unit 221 increases the lottery probability by the increase change width α (step C5). If the lottery probability after change is larger than the maximum value of today's lottery probability (step C7: YES), the lottery probability after change is set as the maximum value of today's lottery probability (step C9).

  If the medal payout detection unit 120 detects a medal payout (step C11: YES), the medal counting unit 210 decreases the medal payout number by “1” (step C13).

  If the lottery by the lottery unit 220 occurs (step C15: YES) and the lottery result is “win” (step C17: YES), the lottery probability change unit 221 decreases the lottery probability by the decrease change width β. (Step C19). If the lottery probability after change is smaller than the minimum value of today's lottery probability (step C21: YES), the lottery probability after change is set as the minimum value of today's lottery probability (step C23).

  Next, the lottery unit 220 compares the current date and time, day of the week, and the like with the application condition 322 and the time zone 322c of the change width correction coefficient table 322, and determines whether it is time to change the change widths α and β ( Step C25). When it is necessary to change (step C25: YES), the correction coefficients kα and kβ of the change widths α and β are determined with reference to the change width correction coefficient table 322 (step C27). Then, for each of the change widths α and β, the standard value N is multiplied by the correction coefficient k to change to new change probability α and β of the lottery probability (step C29).

  At this time, the current payout rate is calculated to calculate a difference ΔP between the target value of the payout rate and the calculated actual value, and the change width standard value table 321 is referred to based on the difference ΔP. As the new standard values Nα and Nβ of the change widths α and β are determined, the change widths α and β may be determined using the new standard values Nα and Nβ.

  Thereafter, it is determined whether or not an instruction to end this process has been issued. If no instruction has been issued (step C31: NO), the process returns to step C1 and the same process is repeated. If an end instruction has been given (step C31: YES), the lottery probability changing process is ended.

  Returning to FIG. 14, after that, for example, when a business end instruction is input from the operation input unit 410 after the business ends (step A <b> 7: YES), the processing unit 200 ends the lottery probability variation process and the drive process being executed. (Step A9). Then, the result totaling unit 230 performs a result totaling process, generates today's operation history data 331, and adds it to the operation history DB 330 (step A11).

  FIG. 17 is a flowchart for explaining the result totaling process. First, the payout rate calculation unit 231 uses the medal count data 344 as the medal count history data 336 and generates the payout rate history data 337 based on the medal count data 344. That is, referring to the medal count data 344, the payout rate for today is calculated from the number of inserted and paid out medals for today (Step D1). Next, it is determined whether or not the calculated payout rate is appropriate for the target payout rate (step D3). Specifically, determination is made based on whether or not the calculated payout rate is within a predetermined appropriate range (for example, ± 3%) based on the target payout rate.

  Further, the lottery probability fluctuation history data 333 is generated based on the lottery probability fluctuation data 343. That is, with reference to the lottery probability fluctuation data 343, the current value of the lottery probability is set as the end value of today's lottery probability (step D5). Further, an intermediate value and a fluctuation range of the lottery probability are calculated from the maximum value and the minimum value of today's lottery probability (step D7).

  The change width data 341 is the change width history data 335 and the lottery probability change data 342 is the lottery probability change history data 332.

  Then, today's operation history data 331 including the generated lottery probability change history data 332, lottery probability fluctuation history data 333, medal count history data 336, change width history data 335, payout rate history data 337, and the like is generated, and the operation history It adds to DB330.

  Thereafter, based on the presence / absence of an instruction input from the management input unit 410, it is determined whether or not to display the lottery probability, and if the lottery probability is displayed (step D9: YES), the lottery probability display control unit. 240 performs a lottery probability display process (step D11).

  FIG. 18 is a flowchart for explaining the lottery probability display process. In the lottery probability display process, the lottery probability display control unit 240 first determines a display type (variation / transition display) in accordance with an instruction input from the operation input unit 410 (step E1) and a display format (graph / table format). ) Is determined (step E3).

  Next, if the determined display type is “variation display” (step E5: variation), a display target date is determined in accordance with an input instruction from the operation input unit 410 (step E7). Then, the operation history DB 330 is referred to, and the change in the lottery probability of the determined target date is displayed on the operation display unit 420 on the display screen in the determined display format (step E9).

  After that, if an instruction to change the display format is given (step E11: YES), after changing the display format to the other format (step E13), the process proceeds to step E9 to change the change in the lottery probability of the target day. The display is redisplayed on the display screen having the display format (step E9).

  If an instruction to change the target date is given (step E15: YES), the target date is re-determined according to the input instruction from the operation input unit 410 (step E17), then the process proceeds to step E9, and the operation history DB 330 is entered. , The change in the lottery probability of the changed target day is redisplayed on the display screen of the determined display format (step E9).

  If an instruction to change the display type is given (step E19: YES), the display type is changed to “transition display” (step E21), and then the process proceeds to step E25.

  Subsequently, it is determined whether a display end instruction has been issued. If not (step E23: NO), the process returns to step E11 and the same processing is repeated. If a display end instruction has been given (step E23: YES), the display of the currently displayed lottery probability history screen is terminated, and the lottery probability display process is terminated.

  On the other hand, if the display type is “transition history” (step E5: transition), the display target period (1 year / 1 month) is determined in accordance with the input instruction from the operation input unit 410 (step E25). Next, with reference to the operation history DB 330, the transition of the lottery probability for each unit period (1 month / 1 day) in the target period is calculated (step E27). That is, if the target period is “1 month”, the maximum value, minimum value, intermediate value, fluctuation range, etc. of the lottery probability of each day of the month are used as the transition of the lottery probability of each unit period. If “year”, for each month in the year, the maximum value, minimum value, intermediate value, fluctuation range, and the like of the lottery probability of the month are calculated and used as the transition of the lottery probability in the target period. Then, the transition of the lottery probability in the determined target period is displayed on the operation display unit 420 on the display screen in the determined display format (step E29).

  Thereafter, if an instruction to change the display format is given (step E31: YES), after changing the display format to the other format (step E33), the process proceeds to step E29 to change the transition of the lottery probability in the target period. It is displayed again on the screen in the later display format (step E29).

  If an instruction to change the target period is given (step E35: YES), the target period is re-determined according to the input instruction from the operation input unit 410 (step E37), and then the process proceeds to step E27. Then, the transition of the lottery probability in the changed target period is recalculated (step E27), and the transition of the lottery probability in the calculated target period is re-displayed on the operation display unit 420 on the determined display format screen (step E29). ).

  If an instruction to change the display type is given (step E39: YES), the display type is changed to “variable display” (step E41), and then the process proceeds to step E7.

  Subsequently, it is determined whether a display end instruction has been made. If not (step E43: NO), the process returns to step E31 and the same processing is repeated. If a display end instruction has been given (step E43: YES), the display of the currently displayed lottery probability history screen is terminated, and the lottery probability display process is terminated.

When the lottery probability display process ends, the process returns to FIG. 17 and the result totaling process ends. When the result totaling process is finished, the processing unit 200 returns to FIG. 14, the power source of the medal game apparatus 1000 is shut off, and this control process is finished.
[Action / Effect]
As described above, in the medal game device 1000 according to the present embodiment, a lottery is performed according to a predetermined lottery probability, and when the lottery result is “winning”, a bonus medal is supplied to the game space GS. The lottery probability is increased by a predetermined increase change width α every time a medal M is inserted into the medal insertion slot 31, and is decreased by a predetermined decrease change width β every time the lottery result is “winning”. The The change widths α and β of the lottery probability are determined according to the difference ΔP between the target value and the actual value of the payout rate and conditions such as today's date, day of the week, and time zone.

  The change widths α and β of the lottery probability are determined based on the difference ΔP between the actual value of the payout rate and the target value. That is, the lottery probability change widths α and β differ depending on whether the current value of the payout rate is close to or far from the desired target value. As a result, the fluctuation of the lottery probability can be converged, and the convergence speed can be adjusted by the size of the change widths α and β. Moreover, the change widths α and β of the lottery probability vary depending on the date, day of the week, and time zone. Thereby, adjustments such as increasing or decreasing the fluctuation of the lottery probability can be made according to the date, day of the week, and time zone.

[Modification]
It should be noted that embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
(A) Change of lottery probability For example, in the above-described embodiment, the lottery probability is changed when (1) a medal is inserted and (2) the lottery result is “win”. 3) The lottery probability may be changed when a medal is paid out. Specifically, every time a medal payout is detected by the medal payout detection unit 120, the lottery probability change unit 221 decreases the lottery probability by a predetermined decrease change width γ. In this case, the decrease change width γ is determined according to the difference ΔP between the target value and the actual value of the payout rate, and the decrease change width γ is increased as the target payout rate is larger than the actual value.

  Further, the lottery probability is changed every time one medal is inserted, but the lottery probability may be changed every time a predetermined number such as three or five is inserted. Similarly, when a medal is paid out, the lottery probability may be changed every time one is paid out, or the lottery probability may be changed every time five or ten are paid out.

  In addition, as an opportunity to increase the lottery probability, the lottery probability may be increased and changed every time a predetermined time such as 5 minutes or 10 minutes elapses. In this case, the increase change width can be varied in the same manner as the increase change width α described above. Of course, in addition to the case where a medal is inserted, it may be changed every time a predetermined time elapses.

(B) Decrease change width β
Further, when there are a plurality of lottery probability wins, the decrease change width β may be varied depending on the type. Specifically, for example, there are three kinds of lottery results by the lottery unit 220: “big hit”, “medium win”, and “small win”, and in this order, the number of bonus medals supplied to the game space GS as a privilege When there are many, the reduction width β is increased in the order of “big hit”, “medium hit”, and “small hit”. The same applies to the decrease width γ.

(C) Permission of changing lottery probability The operator may manually set whether to change the lottery probability, for example. Specifically, the lottery probability changing unit 221 changes the lottery probability only when the change of the lottery probability is “permitted”, and the lottery probability is changed when the lottery probability is changed to “impossible”. Without changing the last set lottery probability, it is a fixed value.

(D) Operation Display Unit In the above-described embodiment, it has been described that the operation monitor 62 is provided as the operation display unit 420 inside the housing with the door 61 opened. However, the operation monitor 62 is shared by the game monitor 16. It is good. In that case, it is preferable to switch the display of the game monitor 16 between normal use and maintenance by a switching operation from the management input unit 410.

1000 medal game device 110 medal insertion detection unit, 120 medal payout detection unit 130 communication unit, 140 image display unit, 150 sound output unit 200 processing unit 210 medal counting unit 220 lottery unit, 221 lottery probability change unit, 222 change width change unit 230 Record totaling unit, 231 Payout rate calculation unit 240 Lottery probability display control unit 250 Drive control unit 260 Image generation unit, 270 Sound generation unit 300 Storage unit 310 Control program 321 Change width standard value table, 322 Change width correction coefficient table 323 Target Payout rate data 330 Operation history DB, 331 Operation history data 340 Today's performance data 341 Change width data, 342 Lottery probability change data 343 Lottery probability variation data, 344 Medal count data 345 Manual setting flag 400 Operational equipment, 410 operation The input unit, 420 operation display unit

Claims (10)

When a medal is inserted from the insertion slot, the medal is released into the game space, and the pushing member periodically moves on the medal placement table in the game space, and the medal is inserted from the end of the medal placement table to the medal drop opening. A medal game device in which medals are paid out by falling,
A payout rate calculating means for calculating a payout rate from the inserted medals and the paid out medals;
Lottery control means for performing a lottery according to a given lottery probability and performing a control for releasing a predetermined number of medals to the game space at the time of winning;
When a predetermined number of medals are inserted, every time a predetermined time elapses, when a predetermined number of medals are paid out, or when the lottery is won, the lottery probability is set for a given change width. Change execution means to be changed;
A change range changing unit that changes the change range based on a difference between a preset target payout rate and the payout rate calculated by the payout rate calculating unit;
A medal game device.   The medal game device according to claim 1, wherein the change width changing unit changes the change width using a change rate determined according to any of a current date, a time, and a day of the week. The change execution means includes medal insertion change means for increasing the lottery probability by a given insertion change unit width every time a predetermined number of medals are inserted,
The change width changing means has an input change unit width changing means for changing the input change unit width based on a difference between the target payout rate and the payout rate calculated by the payout rate calculating means.
The medal game device according to claim 1 or 2.   4. The medal game according to claim 3, wherein the change unit width change unit at the time of insertion changes so that the change unit width at the time of insertion is increased as the payout rate calculated by the payout rate calculation unit is smaller than the target payout rate. apparatus. The change execution means includes a winning time change means for decreasing and changing the lottery probability every time the lottery wins, for a given winning time change unit width,
The change range changing means has a winning change unit width changing means for changing the winning change unit width based on a difference between the target payout rate and the payout rate calculated by the payout rate calculating means.
The medal game device according to any one of claims 1 to 4.   6. The medal game according to claim 5, wherein the winning change unit width changing unit changes the winning change unit width to be larger as the payout rate calculated by the payout rate calculating unit is larger than the target payout rate. apparatus. The change execution means has a payout time changing means for decreasing and changing the lottery probability for a given payout change unit width every time a predetermined number of medals are paid out,
The change width changing means has a payout change unit width changing means for changing the payout change unit width based on a difference between the target payout rate and the payout rate calculated by the payout rate calculating means.
The medal game device according to any one of claims 1 to 6.   The medal game according to claim 7, wherein the payout change unit width changing means changes the payout change unit width to be larger as the payout rate calculated by the payout rate calculation means is larger than the target payout rate. apparatus.   The medal game device according to any one of claims 1 to 8, further comprising manual changing means for manually changing the lottery probability. A change permission / rejection setting means for setting permission / inhibition of a change by the change execution means;
The change execution means changes the lottery probability when the change is set to be permitted, and does not change the lottery probability changed last when the change is set to be not permitted,
The medal game device according to any one of claims 1 to 9.

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