JP6918345B2 - Nail position confirmation device for ball game machines - Google Patents

Description

In the present invention, in a ball game machine using a pachinko ball as a game medium, such as a pachinko game machine, an arrange ball game machine, and a sparrow ball game machine, the positions of a large number of game nails firmly planted on the game board are regular positions. It is related to a nail position confirmation device for confirming whether or not it has changed from.

In a ball game machine such as a pachinko game machine, a large number of game nails are firmly planted in the game area of the game board, and the game ball launched on the game board surface flows down while being guided by the game nail, and depending on the falling situation. It is divided into those that win the prize opening or those that do not win. Therefore, the situation of the game nail has a great influence on the winning situation.
By the way, these game nails are firmly planted at a predetermined position on the game board determined in advance according to the model, but due to the limitation of the accuracy of the nail gun, they are not always accurately positioned according to the standard. In addition, if it is installed in the game field for a long period of time and used for games, the game nails may bend due to repeated collisions with the game nails, and the nail heads may also deviate significantly from the normal position. ..

On the other hand, in the method of adjusting the nail position of a gaming machine shown in Patent Document 1 below, a transparent or translucent measuring sheet provided with a hole or an image indicating a reference position of a gaming nail is parallel to the gaming area of the gaming board. The position of the game nail was adjusted while holding the measuring sheet in place and turning over the measuring sheet.

Japanese Patent Application Laid-Open No. 2003-19268

However, it is not easy to grasp the deviation from the regular position of many game nails firmly planted on the game board, and it is an experienced professional worker to check and adjust them. It was a difficult task that took time.
Further, in the method shown in Patent Document 1, the measurement sheet is easily delusional, and the measurement sheet is inserted into the game nail with reference to the game nail to perform alignment. Therefore, as a reference. If the game nail itself is misaligned, the nail may be adjusted to the wrong position.

Therefore, the present invention is intended to provide a nail position confirmation device for a ball game machine, which can accurately confirm the position of a gaming nail and can accurately adjust the nail.

Therefore, the nail position confirmation device of the ball game machine according to the present invention uses a nail position display sheet in which the regular positions of the nail heads of a large number of game nails to be firmly planted in the game area of the game board are printed on a transparent sheet. A position adjusting means is provided which is attached to a transparent plate arranged on the front surface of the game board and the transparent plate is arranged so that the position of the transparent plate can be finely adjusted up, down, left and right with respect to the game board, and further, the game board and the nail. It is characterized in that reference marks that can be aligned with each other in front view are displayed on the position display sheet.
By making it possible to confirm the position of each game nail based on the reference mark in this way, accurate confirmation can be made.

Further, in the nail position confirmation device of the present invention, the position adjusting means has a play fitting portion that supports the transparent plate so as to be able to move up, down, left and right with respect to the game board, and the transparent plate cannot be moved with respect to the game board. It is characterized in that each of the lock portions to be fixed to the transparent plate is provided in the holding frame for holding the transparent plate.
By supporting the transparent plate so as to be finely movable in this way, it is possible to match the reference mark. Further, by fixing the transparent plate by the lock portion, the state in which the reference mark is matched is maintained, and the transparent plate can be prevented from slipping during the inspection / confirmation work.

Further, in the nail position confirmation device of the present invention, the position adjusting means forms a position determination hole outside the game area of the game board, and finely adjusts the position of the support shaft vertically and horizontally in the holding frame for holding the transparent plate. It is characterized in that it is provided as possible and is provided with an alignment mechanism in which the support shaft is fitted into the positioning hole.
By supporting the reference mark so that it can be finely moved in this way, it becomes easier to match the reference mark.

Further, the present invention is characterized in that, in the nail position confirmation device, the nail position display sheet is attached to the front surface of a transparent plate so that the printed surface is on the front side.
By this attachment, the game ball does not hit the nail position display sheet during the game, and the nail position display sheet is prevented from being worn.
Further, the present invention is characterized in that, in the nail position confirmation device, the nail position display sheet displays a regular nail position by a nail position mark having an outer diameter smaller than the outer diameter of the nail head.
It becomes easy to see how much the nail head has moved with respect to the nail position mark from the front view, and inspection / confirmation becomes easy.

Further, the present invention is characterized in that in the nail position confirmation device, the nail position mark has a color similar to the color of the nail head.
Since the nail position mark can be made inconspicuous, the transparent plate to which the nail position display sheet is attached can be used as it is during the game.
Further, the present invention is characterized in that the nail position mark is circular in the nail position confirmation device.
It becomes easier to determine the degree of movement of the nail head with respect to the nail position mark, and inspection / confirmation becomes easier.

The position of the game nail can be confirmed accurately and easily. Therefore, the nail adjustment can be performed accurately.

An exploded perspective view of a game board, a transparent plate, and a nail position display sheet of a ball game machine according to the present invention. The front view of the game board of the ball game machine which concerns on this invention. The front view of the transparent plate of the ball game machine which concerns on this invention. An exploded perspective view of the positioning mechanism of the ball game machine according to the present invention. An exploded perspective view of the positioning mechanism of the ball game machine according to the present invention. An exploded perspective view of the positioning mechanism of the ball game machine according to the present invention. The front view of the internal structure of the alignment mechanism of the ball game machine which concerns on this invention. The rear view of the internal structure of the alignment mechanism of the ball game machine which concerns on this invention. The perspective view when the transparent plate is set on the game board of the ball game machine which concerns on this invention. The perspective view when the transparent plate is set on the game board of the ball game machine which concerns on this invention. FIG. 9 is a cross-sectional view taken along the line AA of FIG. The perspective view of the state in which the transparent plate is fixed to the game board of the ball game machine which concerns on this invention. The front view of the state where the transparent plate is fixed to the game board of the ball game machine which concerns on this invention. FIG. 13 is a cross-sectional view taken along the line BB. The back view of the main part in the state where the transparent plate is fixed to the game board of the ball game machine which concerns on this invention. The vertical sectional view of the game board, the transparent plate and the nail position display sheet of the ball game machine which concerns on this invention. The front view which shows the nail position confirmation situation of the ball game machine which concerns on this invention. The perspective view which shows the other embodiment of the alignment mechanism of the ball game machine which concerns on this invention. The right side view of the alignment mechanism shown in FIG. An exploded perspective view of the alignment mechanism shown in FIG. An exploded perspective view of the alignment mechanism shown in FIG. FIG. 8 is a cross-sectional view of the alignment mechanism shown in FIG. The vertical sectional view of the game board, the transparent plate and the nail position display sheet of the ball game machine which concerns on this invention. The vertical sectional view of the game board, the transparent plate and the nail position display sheet of the ball game machine which concerns on this invention. The vertical sectional view of the game board, the transparent plate and the nail position display sheet of the ball game machine which concerns on this invention.

Next, the configuration of the nail position confirmation device of the ball game machine according to the present invention will be described with reference to the drawings. FIG. 1 shows a game board 10 that is replaceably provided in the ball game machine, a transparent plate 40 that is attached to the front surface of the game board 10, and a nail position display sheet 90 that is attached to the transparent plate 40. .. As shown in FIG. 2, the game board 10 is a thick plastic plate having a large window hole 11 formed in the center for arranging a pattern display device such as a liquid crystal display or an effect device (not shown). Ball guidance rails 12a and 12b are fixed to the front surface of the game board 10, and a large number of game nails 14 are firmly planted in the game area 13 surrounded by the ball guidance rails 12a and 12b. Each of the game nails 14 shown in this embodiment has a golden surface and the nail head is formed in a hemispherical shape having a diameter of 4.2 mm. Further, in the game area 13, a windmill, an illumination device (not shown), a passing chucker, a normal winning opening, a starting winning opening, a variable winning opening, etc. (not shown) are arranged. Mounting holes 15a to 15d for installation are formed. Further, a winning ball collecting gutter, a game control board, and the like (not shown) are provided on the back side of the game board 10. During the game, a game ball is launched along the ball guidance rails 12a and 12b, and the game ball flows down the game area 13 while being guided by the game nail 14. Then, the game balls that have not won in the winning openings such as the normal winning opening and the starting winning opening are discharged from the out ball discharge port 21.
A side frame member 21a projecting forward as much as the upright thickness of the ball guide rails 12a and 12b is fixed to the upper left side of the game board 10 in the outer region of the ball guide rails 12a and 12b by screws. The side frame member 21b is fixed to the lower left side of the game board 10 by screws, and the side frame member 21c is fixed to the upper right side of the game board 10 by screws, and the side frame member 21c is fixed to the upper right side of the game board 10 by screws. Side frame members 21d are fixed to the lower part by screws.

Further, substantially square play fitting holes 22a and 22b are formed in the side frame members 21a and 21b corresponding to the upper and lower edges on the left side of the game board 10, respectively, and the inner bottom portions of the play fitting holes 22a and 22b will be described later. As shown in FIG. 11, the leaf spring 23 is provided. Further, a small circular position determination hole 24 is formed by cutting on the upper edge portion on the right side of the game board 10, and a large number of nail holes are drilled in the game area 13 with the position determination hole 24 as a reference. By forming by processing and firmly planting the game nail 14 in the nail hole, the position determination hole 24 and a large number of game nails 14 can be positioned with high accuracy and accuracy with respect to the position determination hole 24. ing.

A loose clip 25 is rotatably attached to the upper edge of the side frame member 21c. Further, a recessed portion 26 is formed in the side frame member 21d, and a substantially oval-shaped engaging hole 27 penetrating to the back side of the game board 10 is formed in the recessed portion 26. Further, cross-shaped reference marks 28a and 28b are displayed on the front surface of the side frame member 21c near the upper edge and on the front surface of the side frame member 21d, respectively. The side frame members 21a and 21b are attached to mounting holes (not shown) that are machined with reference to the positioning hole 24. Therefore, the reference marks 28a and 28b can be positioned with high accuracy with respect to the positioning hole and each of the nail holes.

On the other hand, the transparent plate 40 is surrounded by a plastic holding frame 42 all around. Further, the nail position display sheet 90 displays the regular position of the game nail 14 by printing the nail position mark 92 on the surface of the transparent sheet 91. Each nail position mark 92 is indicated by a yellow circle of gold or a similar color like the nail head of the game nail 14, and the outer diameter of the circle is smaller than the outer diameter of the nail head of the game nail 14. It is set to 2.2 mm. Further, the cross-shaped reference marks 93a and 93b that serve as the reference for the position of each of the nail position marks 92 are printed on the upper right and lower left of the nail position display sheet 90.
Further, the model name 94 is printed on the lower edge of the nail position display sheet 90. Further, a hologram type anti-counterfeit label 95 is attached to the lower edge of the nail position display sheet 90 so that the nail position display sheet 90 is not easily forged by a copier.
Then, the nail position display sheet 90 is attached to the front surface of the transparent plate 40 as shown in FIGS. 3, 16 and the like by the adhesive coated on the back surface.

Next, the configuration of the position adjusting means provided on the holding frame 42 will be described. The position adjusting means includes a free fitting portion 43, a lock portion 44, and an alignment mechanism 45. First, when the free fitting portion 43 is described, it is as shown in FIG. 11 on the left side side of the holding frame 42. The holding frame 42 and the transparent plate are formed by integrally forming hook-shaped pieces 43a and 43b whose tip portions are bent in an L shape and loosely fitting the hook-shaped pieces 43a and 43b into the free fitting holes 22a and 22b. The 40 is supported on the game board 10 so as to be finely movable up, down, left and right, and the hook-shaped pieces 43a and 43b are pressed by the leaf spring 23, so that the transparent plate 40 is held on the front surface of the game board 10 at regular intervals. I am trying to be done.
Further, as shown in FIGS. 3 and 9, the lock portion 44 has a U-shaped horizontal cross section that can be loosely fitted into the recessed portion 26 of the game board 10 toward the right side of the lower side of the holding frame 42. 46 is extended to form a vertically elongated hole 47 and a front view arc-shaped wedge portion 49 in the hanging portion 46 so that the lock piece 48 can be attached to the vertically elongated hole 47 as shown in FIG. ing. In the lock piece 48, a hook-shaped pinching portion 48b is integrally formed at the front end of the shaft portion 48a penetrating into the vertically elongated hole 47, and an orthogonal engaging portion 48c is integrally formed at the rear end. Become.

Further, the positioning mechanism 45 is fastened to the right side of the holding frame 42 toward the upper side by screws 50a to 50c. Further, a plate-shaped stop piece 51 is integrally formed with the holding frame 42 in the vicinity of the right side of the alignment mechanism 45.
Next, the configuration of the alignment mechanism 45 will be described in detail with reference to FIGS. 4 to 8. The positioning mechanism 45 is formed by inserting the screws 50a to 50c and the screws 54a and 54b into the case 52 and the lid 53 to fix the case 52 and the lid 53, and is shown in FIG. As described above, a support shaft 55 that can be fitted into the positioning hole 24 is projected from the back surface of the case 52, and a left-right movement dial 56 for finely moving the support shaft 55 left and right is formed on the lid 53. The vertical movement dial 57 for finely moving the support shaft 55 up and down is exposed to the front surface from the hole 56a, and is exposed to the front surface from the dial hole 57a formed in the lid 53. The left-right moving dial 56 has a worm 56c fixed to the lower end of the dial shaft 56b, and the dial shaft 56b is rotatably supported by being vertically inserted into the bearing portion 52a formed in the case 52, and the worm 56b is supported. A worm wheel 56d that meshes with the 56c is rotatably supported by a support shaft 52b formed on the case 52, and a pinion 56e is integrally formed on the worm wheel 56d. The tip of the support shaft 55 is formed in a tapered shape so that it can be easily fitted into the positioning hole 24.

Further, as shown in FIG. 6, the left-right moving assembly 63 is assembled by inserting the screws 62a and 62b into the molding members 61a and 61b. The left-right moving assembly 63 has a horizontally long slit-shaped guide hole 52c formed in the case 52, and slidably penetrates a protruding edge 63b formed on the back surface of the molding member 61b into the guide hole 52c. By inserting it, it is provided so as to move only in the left-right direction in the case 52. Further, as shown in FIG. 7, rack teeth 63c are integrally formed on the lower edge portion of the molding member 61b, and the rack teeth 63c are meshed with the pinion 56e.

Further, the vertical movement dial 57 is rotated by fixing the dial shaft 57b to the vertical movement dial 57 with an E ring 57'and horizontally inserting the dial shaft 57b into the bearing portion 61d formed on the molding member 61a. The worm wheel 57e is rotatably supported, and the worm 57c is fixed to the tip of the dial shaft 57b, and the worm wheel 57e in which the pinion 57d is integrally formed with the support shaft 61c formed on the molding member 61b is rotatably supported. The 57e is engaged with the worm 57c.
Further, a rack tooth 65a that meshes with the pinion 57d and a shaft base frame 65 having a long guide hole 65b in the vertical direction are fixed to the base end portion of the support shaft 55, and a guide projecting from the molding member 61b. The shaft 63d is loosely fitted into the guide hole 65b, the support shaft 55 is vertically inserted into the elongated hole 63e formed in the molding member 61b in the vertical direction, and the support shaft 55 is further formed in the case 52. It penetrates the large-diameter hole 52d and projects to the back surface of the alignment mechanism 45.

Therefore, when the left-right movement dial 56 is rotated, the pinion 56e is rotated to move the left-right movement assembly 63 left-right to move the support shaft 55 left-right, while when the up-down movement dial 57 is rotated, the pinion 57d is rotated to rotate the shaft. Since the base frame 65 is moved up and down, the support shaft 55 is moved up and down.

In the nail position confirmation device configured in this way, first, when inspecting and confirming whether or not a large number of game nails 14 firmly planted on the game board 10 are deviated from the normal positions, FIGS. 9 and 10 are shown. As described above, the hook-shaped pieces 43a and 43b formed on one side edge of the holding frame 42 are loosely fitted into the play fitting holes 22a and 22b of the game board 10, and the support shaft 55 is fitted into the positioning hole 24. do. At this time, since the holding frame 42 is supported so as to be able to move up, down, left, and right with respect to the game board 10, the holding frame 42 can be moved in either direction as necessary with respect to the positioning hole 24. The support shaft 55 can be fitted. Further, the loose clip 25 can support the holding frame 42 so as to be finely movable by rotating the loose clip 25 and sliding it on the surface of the plate-shaped stop piece 51.

Next, the left-right movement dial 56 and the up-down movement dial 57 are rotated to move the support shaft 55 left-right and up-down. At this time, since the support shaft 55 is fitted in the positioning hole 24, the holding frame 42 and the transparent plate 40 integrated with the holding frame actually slightly move left and right and up and down. Further, by directly moving the holding frame 42 to the left or right by hand, the holding frame 42 can be slightly tilted to the left or right with the support shaft 55 as a fulcrum. By making such fine adjustments, the reference marks 93a and 93b are perfectly aligned with the reference marks 28a and 28b displayed on the game board 10 in front view. Then, when they can be matched, the pinching portion 48b of the lock piece 48 inserted into the engaging hole 27 is rotated, and the engaging portion 48c is moved to the back side of the game board 10 as shown in FIGS. 14 and 15. Engage with a surface. At this time, since the knob portion 48b rides on the wedge portion 49, the shaft portion 48a is pulled forward, so that the holding frame 42 can be firmly fixed to the game plate 10.
Then, in this state, when the game board 10 is viewed from the front, it is inspected and confirmed whether or not the nail head of each game nail 14 matches the nail position mark 92. At that time, a digital microscope, a microscope, or the like may be applied to the surface of the transparent plate 40 to detect the deviation between the nail head of the game nail 14 and the nail position mark 92. Then, for example, as shown as "OK" in FIG. 17, if the nail position mark 92 is located within the range of the nail head circle of the game nail 14, it is passed, and as shown as "NG", the nail position. If the mark 92 is located outside the range of the nail head circle of the game nail 14, it is rejected. By displaying the nail position mark 92 as a circle having a diameter smaller than that of the nail head circle in this way, it becomes easy to determine pass / fail in consideration of a certain allowable measurement error.

On the other hand, FIGS. 18 to 22 show other embodiments of the alignment mechanism 45. In this embodiment, the parts that perform the same functions as those in the embodiment are designated by the same reference numerals as those in FIGS. 4 to 8, and the description thereof will be omitted. In this embodiment, the left-right movement dial 56 for finely moving the support shaft 55 left and right is vertically supported, and the up-and-down movement dial 57 for finely moving the support shaft 55 up and down is horizontally supported. .. That is, in this embodiment, screw grooves are formed on the outer circumference of the dial shaft 56b of the left-right movement dial 56 and the outer circumference of the dial shaft 57b of the vertical movement dial 57, respectively, and the vertical movement body 70 formed in a box shape is vertical. By inserting the shaft 71, the vertical moving body 70 is supported so as to be vertically movable along the vertical shaft 71, the dial shaft 57b is screwed into the vertical moving body 70, and the horizontal shaft 73 is connected to the left and right moving body 72. The left and right moving body 72 is supported in the vertical moving body 70 so as to be movable left and right along the horizontal axis 73, and the dial shaft 56b is screwed into the left and right moving body 72. Then, a support shaft 55 is projected from the back surface of the left and right moving body 72, and the support shaft 55 is projected from 52d. Therefore, when the vertical movement dial 57 is rotated, the support shaft 55 moves up and down as the vertical movement body 70 moves up and down, and when the left and right movement dial 56 is rotated, the support shaft 55 moves left and right as the left and right moving body 72 moves left and right. ..
As described above, the configuration of this embodiment can be simplified by eliminating the orthogonal transmission mechanism including the worm and the worm wheel in the embodiments shown in FIGS. 4 to 8. Then, by rotating the left-right movement dial 56 and the up-down movement dial 57, the transparent plate 40 is slightly moved in the same manner as in the above embodiment, and the reference marks 28a and 28b and the reference marks 93a and 93b are aligned.

The transparent plate 40 may be fixed to the front surface of the game board 10 when inspecting and confirming the state of each game nail 14 as described above, but the transparent plate 40 may also be fixed to the front surface of the game board 10 during the game. The transparent plate 40 can function as an inner transparent plate among the double transparent plates of the conventional pachinko gaming machine by setting the above in a state of being fixed to the front surface of the game board 10. In that case, as shown in FIG. 23, the transparent plate can be doubled by arranging the transparent plate 75 on the outside of the transparent plate 40. In such a case, since the nail position mark 92 is visible to the player during the game, it is preferable to make the nail position mark 92 a color similar to the color of the nail head of the game nail 14 in order to make it inconspicuous.
Further, the nail position display sheet 90 may not be attached to the transparent plate in advance, but may be attached at the time of inspection / confirmation work. In that case, after attaching the nail position display sheet 90, the alignment mechanism is operated to align the reference marks 28a and 28b with the reference marks 93a and 93b, and then the inspection / confirmation work is performed. ..
Further, the nail position display sheet 90 on which the nail position mark 92 is printed may be attached to the rear side surface of the transparent plate 40 as shown in FIG. 24. Even in such a case, since the nail head of the game nail 14 faces the nail position mark 92, there is little possibility that the game ball comes into contact with the nail position mark 92 during the game, and the nail position mark 92 comes into contact with the nail position mark 92. There is almost no risk that it will wear out and disappear. Further, as shown in FIG. 25, the nail position mark 92 printed on the nail position display sheet 90 can be attached so as to be in contact with the rear side surface of the transparent plate 40. Then, the printing ink of the nail position mark 92 can be attached. Note that bubbles may be formed depending on the thickness of the ink. In this regard, as shown in FIG. 16 or 23, there is no such concern by attaching the nail position display sheet 90 to the front surface of the transparent plate 40 so that the printed surface faces the front side.
Further, in the embodiment, as shown in FIG. 1, the double transparent plates of the pachinko gaming machine are separated one by one, and the inner transparent plate thereof is described as being adjustable in position. The structure may be a multi-layer transparent plate in which multiple transparent plates are integrated. Further, in the case of such a multi-layer transparent plate structure, it is possible to cope with the model change by attaching the nail position display sheet 90 to the rear surface side of the transparent plate 40 using a peelable adhesive. It will be possible. On the contrary, when taking measures against fraudulent measures on the nail position display sheet 90, if the nail position display sheet 90 is attached to the front surface of the transparent plate 40 inside the multi-layer transparent plate, the nail position display sheet 90 can be replaced. It is possible to prevent such fraudulent activities.

10 ... Game board, 11 ... Window hole, 12a, 12b ... Ball guidance rail, 13 ... Game area, 14 ... Game nail, 15a to 15d ... Mounting hole, 21 ... Out ball outlet, 21a to 21d ... Side frame member , 22a, 22b ... Free fitting hole, 23 ... Leaf spring, 24 ... Positioning hole, 25 ... Loose clip, 26 ... Recessed recess, 27 ... Engagement hole, 28a, 28b ... Reference mark, 40 ... Transparent plate, 42 ... Holding frame, 43 ... Free fitting part, 43a, 43b ... Hook-shaped piece, 44 ... Lock part, 45 ... Alignment mechanism, 46 ... Hanging, 47 ... Vertical hole, 48 ... Lock piece, 48a ... Shaft part, 48b ... Picking part, 48c ... Engaging part, 49 ... Rabbit part, 50a-50c ... Screw, 51 ... Plate-shaped piece, 52 ... Case, 52a ... Bearing part, 52b ... Support shaft, 52c ... Guide hole, 52d ... Large-diameter hole, 53 ... lid, 54a, 54b ... screw, 55 ... support shaft, 56 ... left-right movement dial, 56a ... dial hole, 56b ... dial shaft, 56c ... worm, 56d ... worm wheel, 56e ... pinion, 57 ... Vertical movement dial, 57a ... Dial hole, 57b ... Dial shaft, 57c ... Warm, 57d ... Pinion, 57e ... Warm wheel, 57'... E ring, 61a, 61b ... Molding member, 61c ... Support shaft, 61d ... Bearing part , 62a, 62b ... screw, 63 ... left and right moving assembly, 63b ... ridge, 63c ... rack tooth, 63d ... guide shaft, 63e ... long hole, 65 ... shaft base frame, 65a ... rack tooth, 65b ... guide hole, 70 ... Vertical moving body, 71 ... Vertical axis, 72 ... Left and right moving body, 73 ... Horizontal axis, 75 ... Transparent plate, 90 ... Nail position display sheet, 91 ... Transparent sheet, 92 ... Nail position mark, 93a, 93b ... Reference mark, 94 ... Model name, 95 ... Anti-counterfeit seal

Claims (6)

A nail position display sheet in which the regular positions of the nail heads of a large number of game nails to be firmly planted in the game area of the game board is printed on a transparent sheet is attached to a transparent plate arranged on the front surface of the game board. It is provided with position adjusting means for arranging the transparent plate so that the position of the transparent plate can be finely adjusted up, down, left and right with respect to the game board, and further displays reference marks that can match the position of the game board and the nail position display sheet in a front view. A nail position confirmation device for a ball game machine, which is characterized by being printed. In the position adjusting means, the transparent plate is provided with a play fitting portion that supports the transparent plate so as to be able to move up, down, left and right with respect to the game board, and a lock portion that immovably fixes the transparent plate to the game board. The nail position confirmation device for a ball game machine according to claim 1, wherein the holding frame is provided. The position adjusting means forms a positioning hole outside the gaming area of the gaming board, and provides a support shaft in a holding frame for holding the transparent plate so that the position can be finely adjusted up, down, left, and right. The nail position confirmation device for a ball game machine according to claim 1 or 2, further comprising an alignment mechanism fitted into the positioning hole. The nail position confirmation device for a ball game machine according to any one of claims 1 to 3, wherein the nail position display sheet is attached to the front surface of a transparent plate so that the printed surface faces the front side. The nail of a ball game machine according to any one of claims 1 to 4, wherein the nail position display sheet displays a regular nail position by a nail position mark having an outer diameter smaller than the outer diameter of the nail head. Positioning device. The nail position confirmation device for a ball game machine according to claim 5 , wherein the nail position mark has a color similar to the color of the nail head.

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