JP5110654B2 - Pachinko machine - Google Patents

Description

  The present invention relates to a pachinko machine having a game board made of synthetic resin.

  In recent years, a plate-like member at least partially formed of a transparent thermoplastic synthetic resin, and a fitting step portion that substantially covers the outer periphery of the plate-like member and detachably fits the plate-like member are provided. A pachinko machine, for example, as disclosed in Patent Document 1, which includes a game board made of a synthetic resin base member, has been devised. In such a pachinko machine, the base member is firmly fixed to the middle frame in consideration of the backlash of the conventional game board.

JP 2008-403 A

  However, in such a game board made of synthetic resin, since the base member is firmly fixed to the middle frame, when the temperature change occurs, the base member expands in a direction in which the base member is not fixed. Therefore, a gap is generated between the plate-like member in that direction and the mating step portion of the base member, causing the plate-like member to be displaced, or the plate-like member is pulled by the base member that expands, thereby causing the plate The shaped member may be displaced. As a result, there is a problem that the gaming member provided on the plate-like member is displaced.

  Therefore, the present invention has been made to solve the above problem, and the boss portion for fitting the middle frame and the base member and the boss portion for fitting the base member and the plate-like member are provided at the installation position and An object of the present invention is to provide a pachinko machine in which the positional deviation of a gaming member installed on a plate-like member is reduced by adjusting the fitting state.

  The invention described in claim 1 of the present invention is such that a metal middle frame is installed inside the machine frame that supports the pachinko machine body, and a game area in which a game ball flows down is formed on the front surface. A substantially quadrangular plate-like game board comprising a synthetic resin plate member and a synthetic resin base member that supports the plate member in a fitted state is installed in the middle frame; A pachinko machine in which a pair of fixed boss portions for fixing the game board on one diagonal line is provided, and a fixed boss receiving portion capable of fitting the fixed boss portion is provided on the base member. The reference boss portion for fixing the plate-like member to the base member is provided on the lower side of the game board and on the corner on the side where the fixed boss receiving portion is not provided. , Out of the game area in the plate-like member The location, characterized in that a said reference boss mateable reference boss receiving portion to portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, a positioning boss portion for positioning the plate-like member is provided in the vicinity of the pair of fixed boss receiving portions of the base member. On the other hand, a positioning boss receiving portion into which the positioning boss portion can be fitted is provided at a position outside the game area in the plate-like member.

  According to a third aspect of the present invention, in the first aspect of the present invention, the first positioning boss portion is provided on the base member at a position vertically above the reference boss portion and sandwiching the game area. On the other hand, a second positioning boss portion is provided at a position where the height in the horizontal direction of the reference boss portion is substantially the same as that of the reference boss portion. And a first positioning boss receiving portion to which the first positioning boss portion can be fitted and a second positioning boss receiving portion to which the second positioning boss portion can be fitted, and the first positioning boss portion. And the first positioning boss receiving portion in the vertical direction is larger than the vertical play between the reference boss portion and the reference boss receiving portion, and the second positioning boss portion and the second positioning boss receiving portion are Play in the lateral direction between the parts, characterized by being larger than the play in the lateral direction and the reference boss said reference boss receiving portion.

  The invention described in claim 4 is the invention described in claim 3, wherein the reference boss portion, the first positioning boss portion, and the second positioning boss portion are vertically and horizontally ribbed from the columnar shaft portion. While forming the projecting piece, while making the protruding amount of the rib piece protruding in the vertical direction of the first positioning boss portion smaller than the protruding amount of the rib piece protruding in the vertical direction of the reference boss portion, By making the protruding amount of the protruding rib piece protruding in the left-right direction of the second positioning boss portion smaller than the protruding amount of the rib piece protruding in the left-right direction of the reference boss portion, the first positioning boss portion and The play in the vertical direction with the first positioning boss receiving part is made larger than the play in the vertical direction between the reference boss part and the reference boss receiving part, and the second positioning boss part and the second positioning boss receiver Play in the lateral direction between the, characterized in that it is larger than the play in the lateral direction and the reference boss said reference boss receiving portion.

  The invention described in claim 5 is the invention described in claim 3 or 4, wherein the reference boss receiving portion is a recess or a hole formed in a substantially circular shape, while the first positioning boss. By making the receiving portion into a recess or a hole formed in an elliptical shape that is long in the vertical direction, play in the vertical direction between the first positioning boss portion and the first positioning boss receiving portion can be reduced. And play in the vertical direction with the reference boss receiving portion.

  The invention described in claim 6 is the invention described in any one of claims 1 to 5, wherein a game ball launching device for launching a game ball into the game area is installed, and the game A pair of rail members for guiding the game balls launched by the game ball launching device from the lower part to the upper part of the game area are installed on the front surface of the board, and the reference boss part is an end on the lower side of the rail member. It is provided near the part.

  According to the first aspect of the present invention, when expansion due to a temperature change occurs in the base member, the base member is a middle frame formed by fitting a pair of fixed boss portions and fixed boss receiving portions provided on a diagonal line. Since it is firmly fixed to the corner, it cannot expand in the direction of the corner on the diagonal line. For this reason, the base member expands in the direction of the corner where the fixed boss receiving portion does not exist, and the plate-like member fitted to the base member is pulled by the base member to cause a position change in the same direction. On the other hand, the expansion of the plate-like member itself due to the temperature change is because the plate-like member is fixed to the base member by fitting the reference boss portion and the reference boss receiving portion. It will occur as a starting point. In other words, the corner portion of the plate-like member provided with the reference boss portion changes its position in the outward direction by being pulled by the base member. The change is canceled out, and as a result, the position change of the plate-like member is reduced.

  In addition, according to the first aspect of the present invention, the reference boss portion is provided at the lower corner portion of the base member, and the plate-like member is fixed to the base member on the lower side, so that a temperature change occurs. Then, the plate member is pulled in synchronization with the base member on the lower side. Therefore, there is no gap between the outer periphery of the plate-like member on the grounding surface side and the inner periphery of the base member, and the grounding surface of the plate-like member is not rattled.

  According to the second aspect of the present invention, since the positioning boss portion is provided in the vicinity of the fixed boss portion, the expansion direction of the plate-like member is limited to the direction opposite to the expansion direction of the base member, and the middle frame The positional change with respect to can be further reduced.

According to the third aspect of the present invention, the first positioning boss portion and the first positioning boss receiving portion are provided vertically above the reference boss portion and the reference boss receiving portion, and the first positioning boss portion and the first positioning boss portion are provided. In relation to the boss receiving part, the play is adjusted small in the left-right direction like the reference boss part and the reference boss receiving part, so the function as positioning is secured, and the play is adjusted greatly in the vertical direction, It is possible to allow the plate-like member to expand in the vertical direction and to effectively suppress the distortion.
According to the third aspect of the present invention, the second positioning boss receiving portion and the second positioning boss receiving portion are provided at the same height in the vertical direction of the reference boss portion and the reference boss receiving portion. In the relationship between the portion and the second positioning boss receiving portion, play is greatly adjusted in the left-right direction, so that expansion of the plate-like member in the left-right direction can be allowed, and distortion can be effectively suppressed. The effect which maintains the space | interval of the game nails installed in the upper part of a winning opening of a normal electric accessory can be show | played.

  According to the invention described in claim 4, the first positioning boss part and the second positioning boss part only change the protruding amount of the rib piece in the predetermined direction from the columnar shaft part as compared with the reference boss part. Since the play in the predetermined direction can be increased, the formation is easy.

  According to the fifth aspect of the present invention, the first positioning boss receiving portion corresponding to the first positioning boss portion is formed vertically longer than the reference boss receiving portion in the vertical direction in the vertical direction. Since play in the direction can be increased, formation is easy.

  According to the sixth aspect of the present invention, since the boss portion and the boss receiving portion located near the rail member are adjusted so that the proximity thereof is the highest, the plate on which the rail member is provided There is no deviation between the base member and the base member, and the launch accuracy of the game ball can be further stabilized.

  Hereinafter, an embodiment of a pachinko machine according to the present invention will be described in detail with reference to the drawings.

(Description of the main unit)
The pachinko machine 1 in FIG. 1 installs a game board 10 on a machine frame 2 that supports the main body of the pachinko machine 1 via a middle frame 8 that is a metal plate member, and closes the front of the game board 10. A possible front door 3 is attached to be freely opened. The space in front of the game board 10 that is closed by the front door 3 (the front face of the game board 10) is a substantially circular game area 11 in which game balls flow down.

The game area 11 is surrounded by an outer rail 12 and an inner rail 13 arranged in an arc shape, and a launch passage formed between the outer rail 12 and the inner rail 13 is connected to the game area 11. A game ball can be driven through. In addition, a symbol display area 22 for displaying a “symbol” consisting of numbers “0” to “9”, a pattern, and the like, and a stage member 20 for swinging the game ball left and right are installed in the approximate center of the game area 11. And a guide member (not shown) for guiding the game ball onto the stage member 20 and a scissor member that prevents the game ball from entering the symbol display area 22 formed above the stage member 20. A center member formed by assembling 21 or the like is installed.
The game area includes a large number of game nails (not shown), a gate member 14 through which a game ball can pass, a tulip-type electric accessory 15 having a pair of claw pieces that can be opened and closed, and a door member that can be opened and closed. Are arranged, a winning member 17, 17... That can receive a game ball, a windmill 18 and the like are installed.

Below the game board 10, a supply tray 4 for supplying game balls to a launching device (not shown) and a storage tray 5 for storing game balls overflowing from the supply tray 4 are provided in the machine frame 2. On the other hand, it is attached so as to be able to open one side. Also, in the vicinity of the storage dish 5, a launch handle 6 for operating the launch device, a speaker 7 for performing effects by sound and sound effects, and the like are installed.
Further, on the rear surface of the game board 10, a liquid crystal display device (display device) for displaying “symbols” in the symbol display area 22, a game-related control (for example, a so-called “hit lottery” or display on a liquid crystal display device) A control device or the like is installed.

  In the pachinko machine 1 as described above, when the launch handle 6 is rotated by the player, the launch device is activated and a game ball is driven into the game area 11. When a game ball flowing down the game area wins the tulip-type electric accessory 15, a so-called “hit lottery” is performed by the control device. After confirming the display, a so-called “hit state” is generated in which the door member of the big winning device 16 is intermittently opened a predetermined number of times.

  Hereinafter, the structure of the middle frame 8 and the game board 10 of the present invention will be described in detail with reference to FIGS. FIG. 2 is a front view in which the game board 10 is attached to the middle frame 8, and FIG. 3 is a view showing the middle frame 8. 4 is an explanatory view showing the game board 10 including the plate-like member 31 and the base member 32 from the front side, and FIG. 5 is a view showing the plate-like member 31. As shown in FIG. FIG. 6 is a view showing the base member 32, and FIG. 7 is a view showing a state in which the base member 32 is divided into four parts.

  The middle frame 8 is formed in a vertically long rectangular shape, and a large opening 30 for exposing the display screen of the liquid crystal display device is provided in the approximate center. In addition, fixed boss portions 24a and 24b for fixing the game board 10 are protruded from the upper left and lower right portions of the periphery of the opening 30 of the middle frame 8, and the fixed boss portions 24a and 24b are tapered. It is formed in a substantially cylindrical shape. Further, a pair of pressing portions 28 </ b> A to 28 </ b> D are provided on the left and right side portions of the middle frame 8 in order to suppress backlash in the front and rear directions of the four corners of the game board 10. Reference numeral 29 denotes a shaft support for attaching the front door 3 to the shaft.

The game board 10 includes a plate-like member 31 formed in a single plate shape, and a base member 32 that is fitted and fixed to the entire plate-like member 31 on the rear surface side of the plate-like member 31 (see FIG. 4).
As shown in FIG. 5, the plate-like member 31 is a transparent substantially circular plate-like body molded from acrylic resin, and a plurality of obstacle nails are planted on the front surface thereof, and a lower left portion thereof. The base boss receiving portion 37a having a substantially circular shape for fitting to the base member 32 is formed. Also, an oval first positioning boss receiving portion 37b extending vertically is formed in the vicinity of the outer rail vertically across the reference boss receiving portion 37a. Further, a second positioning boss receiving portion 37c having the same shape as the reference boss receiving portion 37a is formed at the same height as the reference boss receiving portion 37a.

The base member 32 is formed of a synthetic resin (for example, polycarbonate) having higher heat resistance than the plate-like member 31, and as shown in FIGS. 6 and 7, when viewed from the front, the upper left corner and the upper right corner The grid members 51, 52, 53, and 54 corresponding to the lower left corner and the lower right corner are connected to each other. Each of the lattice members 51 to 54 has a lattice structure in which a rib piece having a height of approximately 12 mm protrudes from a bottom plate portion having a thickness of approximately 2 mm and is orthogonal to the vertical direction and the horizontal direction.
A concave fitting portion 33 having the same shape as the plate-like member 31 is formed on the inner peripheral edge on the front side of the base member 32 at a depth of about 9 mm from the surface. Further, in the fitting portion 33 of the base member 32, a reference boss portion 36a is provided in the vicinity of the lower end portion of the outer rail 12 when viewed from the front side, and the first positioning boss portion 36b is vertically above the reference boss portion 36a. And a second positioning boss portion 36c is provided at the same height position in the right direction of the reference boss portion 36a.

  The lattice member 51 in the upper left corner has a substantially triangular shape having a substantially arc-shaped side, and a convex portion that can be fitted into the concave portion of the lattice member 52 is provided at the right end in contact with the lattice member 52 in the upper right corner. Each corner has a concave portion at the lower end in contact with the lattice member 53. The right half of the lattice member 51 is a concave step portion 33a that forms a fitting portion 33 in the assembled state of the base member 32, and the game board 10 is installed on the middle frame 8 in the step portion 33a. In this case, a fixed boss receiving portion 25a into which the fixed boss portion 24a is fitted is formed (FIG. 5). Further, a first positioning boss portion 36b is provided in the step portion 33a.

  The lattice member 52 in the upper right corner has a substantially triangular shape similar to the lattice member 51, and a concave portion is formed at the left end portion in contact with the lattice member 51 in the upper left corner portion, and a lower end portion in contact with the lattice member 54 in the lower right corner portion is Each has a convex portion that can be inserted into the concave portion of the lattice member 54. Further, the left half of the lattice member 51 is a concave step 33 b that forms the fitting portion 33 in the assembled state of the base member 32.

The lattice member 53 at the lower left corner has a substantially triangular shape similar to the lattice member 51, and a convex portion that can be fitted into the recess of the lattice member 51 is formed at the upper end portion in contact with the lattice member 51 at the upper left corner. Each of the right end portions in contact with the lattice member 54 has a convex portion that can be inserted into the concave portion of the lattice member 54. The right half of the lattice member 53 is a concave step portion 33c that forms a fitting portion 33 in the assembled state of the base member 32. In the vicinity of the launch entrance of the outer rail 12 in the step portion 33c, A boss portion 36a is provided.
Further, protrusions 80, 80... Are provided at regular intervals on the lower side of the fitting portion 33. The protrusions 80, 80,... Are formed such that the tip portion in contact with the plate-like member 31 is narrower and rounder than the base end portion, and when the plate-like member 31 is fitted into the base member 32, The plate-like member 31 can be supported by the tips of the projections 80, 80.

The lattice member 54 at the lower right corner has a substantially triangular shape similar to the lattice member 51, and a recess is formed at the upper end portion in contact with the lattice member 52 at the upper right corner, and a recess is formed at the left end portion in contact with the lattice member 53 at the lower left corner. Respectively.
The left half of the lattice member 54 is a concave step portion 33d that forms a fitting portion 33 in the assembled state of the base member 32, and the game board 10 is installed on the middle frame 8 in the step portion 33d. In this case, a fixed boss receiving portion 25b into which the fixed boss portion 24b is fitted is formed, and a second positioning boss portion 36c is provided. The second positioning boss portion 36c is configured in substantially the same shape as the reference boss portion 36a, and the tip of the rib piece projecting in the vertical direction is formed in a trapezoidal shape.

  And the ring-shaped base member 32 is formed by inserting each convex part in the corresponding recessed part and screwing and integrating the grid members 51-54. In addition, a screw hole into which a screw (not shown) for fixing both of the lattice members 51 to 54 in a connected state can be inserted.

  The plate-like member 31 and the base member 32 configured as described above include a reference boss portion 36a provided on the front surface of the base member 32 in addition to the fitting of the fitting portion 33 provided on the front surface of the base member 32, The first positioning boss portion 36b and the second positioning boss portion 36c are fitted into the reference boss receiving portion 37a provided on the plate-like member 31, and the first positioning boss receiving portion 37b and the second positioning boss receiving portion 37c, respectively. The game board 10 is formed by screwing the overlapping part of the plate-like member 31 and the base member 32 and positioning.

And the play in the fitting state of each boss | hub part and a boss | hub receiving part is demonstrated in detail below.
As shown in FIG. 8A, the reference boss portion 36a is formed by protruding rib pieces from the cylindrical shaft portion in the vertical and horizontal directions of the boss portion. In the reference boss portion 36a and the reference boss receiving portion 37a in the fitted state, the left and right and vertical gaps X1 and Y1 are all 0.15 mm, and the play is small in all directions.

  As shown in FIG. 8 (b), the first positioning boss portion 36b is formed by protruding rib pieces only in the left-right direction without protruding rib pieces from the cylindrical shaft portion in the up-down direction. is there. In the first positioning boss portion 36b and the first positioning boss receiving portion 37b in the fitted state, the left and right clearance X2 is 0.15 mm. Further, the first positioning boss portion 36b has no rib pieces in the vertical direction, and the first positioning boss receiving portion 37b is formed vertically long, so that the play in the vertical direction is considerably large. Yes.

  Further, as shown in FIG. 8 (c), the second positioning boss portion 36c is formed by projecting rib pieces from the cylindrical shaft portion in the vertical and horizontal directions of the boss portion, like the reference boss portion 36a. In the second positioning boss portion 36c and the second positioning boss receiving portion 37c in the fitted state, the left-right gap X3 is 0.7 mm and the up-down gap Y3 is 0.15 mm. Therefore, the second positioning boss portion 36c has a slightly larger play in the vertical direction than the reference boss portion 36a, and has a larger play in the left-right direction.

  When the game board 10 is attached to the middle frame 8, the game board 10 is inserted into the holding portions 28A, 28C on the middle frame 8, and the fixed bosses 24a, 24b of the middle frame 8 are fixed to the fixed bosses of the base member 32. It is installed by fitting the receiving portions 25a and 25b and tilting the other pair of the holding portions 28B and 28D in the direction of the game board 10. However, the holding portions 28A to 28D are only for suppressing backlash in the front-rear direction of the game board 10, and the game board 10 is fitted between the fixed boss portions 24a and 24b and the fixed boss receiving portions 25a and 25b. Is fixed to the middle frame 8.

  Further, the positional relationship of the boss portion in the present embodiment will be described. As shown in FIG. 2, the fixed boss portion 25a and the fixed boss receiving portion 26a are arranged on the upper left side of the base member 32 and the fixed boss portion 25b is arranged on the lower right side as shown in FIG. The fixed boss receiving portion 26b is positioned. The base member 32 has a reference boss portion 36a and a reference boss receiving portion 37a at the lower left portion, a first positioning boss portion 36b and a first positioning boss receiving portion 37b at the upper left portion, and a second positioning boss portion at the lower right portion. 36c and the positioning boss receiving part 37c are located.

(Effects of the pachinko machine of the embodiment)
According to the pachinko machine 1 according to the present embodiment as described above, the game board 10 is attached to the middle frame 8 by fixing the fixed boss portions 24a and 24b provided on the middle frame 8 to the fixed boss receiving portion 25a of the base member. , 25b.
In such a game board 10, when the base member 32 expands due to a temperature change, the upper left corner and the lower right corner of the base member 32 are strongly fixed to the middle frame 8. It cannot expand in the part direction. Therefore, the base member 32 expands in the direction of the lower left corner and the upper right corner that are not fixed, and the plate member 31 fitted to the base member 32 is also pulled in the same direction. A position change occurs in the lower left direction with respect to the middle frame 8 in the lower left corner area.

Further, the pachinko machine 1 described in the present embodiment is configured such that the reference boss portion 36a is fitted to the reference boss receiving portion 37a in the lower left corner portion of the game board 10, so that the plate-like member 31 and the base member 32 are connected. Positioning is in progress. The fitting state between the reference boss portion 36a and the reference boss receiving portion 37a is adjusted with little play, and the base member and the plate-like member at this position are firmly fixed. In this case, a radial expansion including a direction opposite to the expansion of the base member 32 is generated with the reference boss portion 36a as a starting point.
That is, the position change in the lower left direction caused by the expansion of the base member 32 at the lower left corner of the plate member 31 is offset by the position change in the upper right direction due to the expansion of the plate member 31 itself. As a result, the position change of the plate-shaped member 31 with respect to the middle frame 8 can be reduced. In the present embodiment, since members that are easily affected by positional deviations such as the entrance of the firing rail 12 are arranged in a predetermined region of the plate-like member 31, these members are not affected by the positional deviations. .

  In the above embodiment, the reference boss portion 36 a needs to be provided at a corner different from the fixed boss receiving portion 25 b on the base member 32. If it is provided at the same corner as the fixed boss receiving portion 25b, the corner portion where the fixed boss receiving portion 25b and the reference boss portion 36a do not exist changes in both the base member 32 and the plate-like member 31 in the outward direction. Will be caused. On the contrary, the corner portion where the fixed boss receiving portion 25b and the reference boss portion 36a exist does not change the position because the base member 32 is fixed to the middle frame, but is fixed to the base member by the reference boss portion 36a. The plate-shaped member that has been expanded expands inward with the reference boss portion 36a as a center, causing a change in position.

In the gaming board 10 of the present embodiment, the reference boss portion 36a and the reference boss receiving portion 37a at the lower left corner are formed with little play, but the first boss provided vertically above the reference boss portion 36a. The positioning boss part 36b is formed so as to generate play in the vertical direction, and can allow the expansion generated in the vertical direction of the plate-like member 31, so that the vertical expansion of the plate-like member 31 is forcibly suppressed and distortion occurs. There is no.
In addition, the second positioning boss portion 36c provided in the same height direction as the reference boss portion 36a is formed so as to cause play in the left-right direction, and can allow the plate-like member 31 to expand in the left-right direction. The expansion of the plate-like member 31 in the vertical direction is forcibly suppressed and no distortion occurs.

Furthermore, in the pachinko machine 1 according to the present embodiment, the fitting between the first positioning boss portion 36b and the first positioning boss receiving portion 37b is compared with the fitting state between the reference boss portion 36a and the reference boss receiving portion 37a. In the combined state, play is large in the vertical direction, and the fitting state between the second positioning boss portion 36c and the second positioning boss receiving portion 37c is adjusted so that play is large in the left-right direction. For this purpose, the first positioning boss portion 36b reduces the protruding amount of the rib pieces in the vertical direction from the columnar shaft portion compared to the reference boss portion 36a, and the second positioning boss portion 36c Since the amount of protrusion of the rib piece in the left-right direction is reduced as compared with the portion 36a, the play in the predetermined direction can be adjusted, and the formation is easy.
Similarly, since the first positioning boss receiving portion 37b is formed vertically long in the vertical direction, play in the vertical direction can be adjusted, so that the first positioning boss receiving portion 37b is easy to form.

  And since the base member 32 which comprises the game board 10 is formed combining the four lattice members 51-54, it has some play in the connection part which connects lattice members. Therefore, even if expansion occurs in any of the lattice members 51 to 54 due to the temperature change, the expansion is eliminated by play of the connecting portion, so that it is difficult to propagate to other adjacent lattice members. In addition, since the play between the lattice portions can slightly change the positions of the respective lattice members 51 to 54, when the plate-like member 31 is expanded, the base member 32 expands the plate-like member 31. By enlarging to match, the expansion of the plate-like member 31 is not forcedly suppressed, and the plate-like member 31 is restrained from being distorted.

In the case of the game board 10 of the type in which the plate member 31 is fitted into the base member 32, if the conventional configuration is adopted, when the game board 10 is installed in an upright state, the inside of the fitting portion 33 of the base member 32 The circumference and the outer circumference of the plate-like member 31 are grounded on the entire surface, and when the game board 10 tries to move in the lateral direction, a large friction is generated.
However, in the pachinko machine 1 in the present embodiment, the plate-like member 31 is in contact with the inner periphery of the fitting portion 33 of the base member 32 at the lower side thereof by the projecting portions 80, 80. Therefore, compared with a conventional pachinko machine in which the lower side of the plate-like member 31 and the inner periphery of the fitting portion 33 of the base member 32 are in contact with each other in the surface, in this embodiment, the plate is expanded or contracted. When the plate-like member 31 moves in the right direction, not much friction is generated between the plate-like member 31 and the base member 32, and movement due to expansion or contraction of the plate-like member 31 is not hindered. Distortion is less likely to occur.

  Due to the above-described features, the lower end of the rail member does not shift due to the expansion and contraction of the plate-like member 31 due to heat, and the game ball is driven from the game ball launcher between the rail members. Is stable. In addition, the lower end of the rail member, which is likely to be loaded by the collision of the launched game ball, can be prevented from being displaced due to the collision.

(Change example of pachinko machine)
The configuration of the pachinko machine 1 according to the present invention is not limited to the aspect of the embodiment described above, and the fixed boss portions 24a and 24b, the fixed boss receiving portions 25a and 25b, the reference boss portion 36a, and the first positioning boss portion 36b. The configuration of the second positioning boss portion 36c, the reference boss receiving portion 37a, the first positioning boss receiving portion 37b, the second positioning boss receiving portion 37c, and the projecting portions 80, 80,. Changes can be made as appropriate without departing from the spirit of the invention.

  In the base member 32, it is not always necessary to provide play in the positioning boss portions 36b and 36c provided in the vicinity of the fixed boss receiving portions 25a and 25b. If there is little play in the positioning boss portions 36b, 36c, of the expansion that occurs radially around the reference boss portion 36a on the plate-like boss portion 31, the first positioning boss portion 36b exists in the upward direction. The expansion toward the right direction and the expansion toward the right direction where the second positioning boss portion exists are suppressed by the firm fixing of the positioning boss portions 36b and 36c to the base member 32. Therefore, the expansion of the plate member 31 is limited to the upper right direction opposite to the expansion of the base member 32, and the change in the position of the plate member 31 relative to the middle frame 8 can be further reduced. .

  Further, in this embodiment, the same polycarbonate resin as that of the base member 32 is used for the material of the reference boss portion 36a, the first positioning boss portion 36b, and the second positioning boss portion 36c, and is integrally molded. It is also possible to fix the plastic after another molding. Furthermore, any of epoxy resins, phenol resins, melamine resins, urea resins and the like may be used.

  The positional relationship between the reference boss portion 36a according to the present invention, the first positioning boss portion 36b, and the second positioning boss portion 36c is that the first positioning boss portion 36b is provided substantially vertically above the reference boss portion 36a. Or if the 2nd positioning boss | hub part 36c is provided in the substantially same height position of the reference | standard boss | hub part 36a, the effect which suppresses the distortion of the plate-shaped member 31 can be achieved. Desirably, in the first positioning boss portion 36b, the center of the first positioning boss portion 36b is located on a straight line from the center of the reference boss portion 36a to the vertical direction of the game board. In the part 36c, the center of the boss part of the reference | standard boss | hub part 36a and the 2nd positioning boss | hub part 36c is located in the same height.

Furthermore, the number of positioning boss portions and the corresponding positioning boss receiving portions is not limited to two. As long as the expansion of the plate-like member 31 is not hindered and, as a result, the effect that the plate-like member 31 is hardly distorted can be maintained, the number may be increased.
In that case, the amount of protrusion of the upper and lower or left and right rib pieces in the positioning boss portion is reduced in inverse proportion to the distance from the reference boss portion, and play in the same direction between the reference boss portion and each positioning boss portion is increased. It is desirable to produce it.

  In this embodiment, the reference boss portion 36a is provided on the left side of the game board 10, but in other embodiments, the reference boss portion 36a is not necessarily limited to this and can be provided on the right side. In that case, the fixed boss receiving portion 25b needs to be provided on the left side which is the opposite side of the reference boss portion 36a, and similarly, the second positioning boss portion 36c needs to be provided on the left side.

Further, the projections 80, 80,... Are not limited to the projections 80, 80,... Formed integrally with the base member 32 as in the above embodiment, but the projections 80, 80 formed separately. .., Etc., such as a method of adhering, may be a method in which protrusions are provided on the base member by other methods.
Further, the material of the projections 80, 80,... Does not need to be the same material (synthetic resin or the like) as the base member 32, and can be different from the material of the base member 32. In addition, when the material of the projections 80, 80... Is different from that of the base member 32, the material of the projections 80, 80... Is frictioned between the plate-like member 31 in contact with the projections. It is preferable to use a material that is unlikely to cause the occurrence of defects (that is, excluding elastic materials having a high coefficient of friction such as synthetic rubber and natural rubber).
By adopting such a configuration, when the plate-like member 31 expands or contracts in the lateral direction, the plate-like member 31 has a lateral force caused by friction generated between the plate-like member 31 and the projections 80, 80. The movement in the direction is not suppressed, and distortion hardly occurs.

  Further, the projections 80, 80,... Are not limited to those provided with the projections at regular intervals as in the above-described embodiment, and the interval and arrangement of the projections and the number of projections are appropriately set as necessary. Can be changed. In addition, the shape of the protrusion may be hemispherical as in the above embodiment, but is not limited to this, and the shape of the protrusion is hemispherical at the tip of a square or triangular or cylindrical base. It is also possible to use a U-shaped one provided with a portion, which can be changed as necessary.

It is explanatory drawing which showed the front surface of the pachinko machine. It is explanatory drawing of the state which attached the game board to the middle frame. It is explanatory drawing of a middle frame. It is explanatory drawing of the game board which consists of a plate-shaped member and a base member. It is explanatory drawing of a plate-shaped member. It is explanatory drawing of a base member. It is explanatory drawing of the lattice member which comprises the base member. (A) An enlarged view of a state where the reference boss portion 36a and the reference boss receiving portion 37a are inserted, (b) an enlarged view of a state where the first positioning boss portion 36b and the first positioning boss receiving portion 37b are inserted, (C) It is an enlarged view of the state which made the 2nd positioning boss part 36c and the 2nd positioning boss receiving part 37c penetrate.

Explanation of symbols

   1 .... Pachinko machines, 8 .... Middle frame, 10 .... Game board, 12 .... Outer rail (rail member), 13 .... Inner rail (rail member), 31 ... Plate member, 32 ... Base member 24a, 24b... Fixed boss portion, 25a, 25b... Fixed boss receiving portion, 36a... Reference boss portion, 36b... First positioning boss portion, 36c. Receiving part, 37b ... first positioning boss receiving part, 37c ... second positioning boss receiving part.

Claims (6)

A metal middle frame is installed inside the machine frame that supports the pachinko machine body,
A substantially quadrangular plate-like game board comprising a synthetic resin plate-like member on which a game area in which a game ball flows down is formed on the front surface and a synthetic resin base member that supports the plate-like member in a fitted state. Installed in the middle frame,
The middle frame is provided with a pair of fixed boss portions for fixing the game board on one diagonal line, while the base member is provided with a fixed boss receiving portion to which the fixed boss portion can be fitted. A pachinko machine,
On the base member, a reference boss portion for fixing the plate-like member is provided on a lower side of the game board and on a corner portion on which the fixed boss receiving portion is not provided,
A pachinko machine, wherein a reference boss receiving portion that can be fitted to the reference boss portion is provided at a position outside the game area in the plate-like member.   Positioning bosses for positioning the plate-like member are provided in the vicinity of the pair of fixed boss receiving portions of the base member, respectively, while the positioning boss is located at a position outside the game area in the plate-like member. The pachinko machine according to claim 1, further comprising a positioning boss receiving portion into which the portion can be fitted. The base member is provided with a first positioning boss portion vertically above the reference boss portion and at a position sandwiching the game area, while the reference boss portion has a height in the left-right direction and in the vertical direction. Is provided with a second positioning boss portion at a position substantially the same as the reference boss portion,
A first positioning boss receiving portion in which the first positioning boss portion can be fitted and a second positioning boss receiving portion in which the second positioning boss portion can be fitted at a position outside the game area in the plate-like member; And providing
The vertical play between the first positioning boss part and the first positioning boss receiving part is larger than the vertical play between the reference boss part and the reference boss receiving part,
The play in the left-right direction between the second positioning boss part and the second positioning boss receiving part is made larger than the play in the left-right direction between the reference boss part and the reference boss receiving part. The pachinko machine described in 1. While forming the reference boss portion, the first positioning boss portion, and the second positioning boss portion by projecting rib pieces vertically and horizontally from the columnar shaft portion,
While making the protrusion amount of the rib piece protruding in the vertical direction of the first positioning boss portion smaller than the protrusion amount of the rib piece protruding in the vertical direction of the reference boss portion,
By making the protruding amount of the protruding rib piece protruding in the left-right direction of the second positioning boss portion smaller than the protruding amount of the rib piece protruding in the left-right direction of the reference boss portion,
The vertical play between the first positioning boss part and the first positioning boss receiving part is larger than the vertical play between the reference boss part and the reference boss receiving part,
The play in the left-right direction between the second positioning boss part and the second positioning boss receiving part is made larger than the play in the left-right direction between the reference boss part and the reference boss receiving part. The pachinko machine described in 1. The reference boss receiving portion is a recess or a hole formed in a substantially circular shape, while the first positioning boss receiving portion is a recess or a hole formed in a long oval shape in the vertical direction. By
4. The play in the vertical direction between the first positioning boss part and the first positioning boss receiving part is made larger than the play in the vertical direction between the reference boss part and the reference boss receiving part. Or the pachinko machine of 4. A game ball launching device for launching a game ball into the game area is installed, and the game ball launched by the game ball launching apparatus is guided to the front of the game board from the lower part to the upper part of the game area. A pair of rail members are installed,
The pachinko machine according to any one of claims 1 to 5, wherein the reference boss portion is provided in the vicinity of the lower end portion of the rail member.

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