JP6458215B2 - Bullet ball machine - Google Patents

Description

  The present invention relates to a ball game machine equipped with a windmill that changes the direction in which a game ball falls.

  Conventional ball game machines are generally equipped with nails and windmills for changing the direction of the fall of the game ball in the game area where the launched game ball flows down. In particular, with regard to a windmill, a design panel (for example, a technique described in Patent Document 1) or a ball guide section (blade) that includes a decorative panel that is detachable and has a design attached to the disk portion of the windmill. ) Is provided at the position closer to the game board than the guide auxiliary member that regulates the movement of the game ball to the game board side, thereby guiding the game ball to a suitable fall trajectory, and the game ball smoothly flows down the game area Various ideas have been made, such as those that are easy to do (for example, the technique described in Patent Document 2).

JP 2006-296585 A JP 2012-187231 A

Such a windmill is provided with a plurality of blades for receiving the falling game ball on the outer periphery of the bearing portion, and the windmill is rotated by the blades receiving the dropped ball. When the windmill rotates, the angle of the blade with respect to the falling ball becomes indefinite, so even if the gaming ball falls to the same position with respect to the windmill, the gaming ball can be guided in various directions and speeds. As a configuration that changes the direction of the falling of the device, it is a device that has a very remarkable effect. Such an effect can be achieved by the smooth rotation of the windmill.
By the way, in order to smoothly rotate the windmill in this way, basically, the windmill nail and the shaft hole (insertion passage, insertion hole) through which the windmill nail is inserted are based on a preferable so-called “fitting tolerance”. Need to be configured. That is, when the clearance between the windmill nail and the shaft hole (insertion passage, insertion hole) is excessively large, the rotation center of the rotating windmill is greatly decentered (blurred) and cannot be rotated smoothly. Therefore, it is necessary to set the gap between the windmill nail and the shaft hole (insertion passage, insertion hole) to be appropriately small.
However, even with a windmill in which the gap between the windmill nail and the shaft hole (insertion passage, insertion hole) is set to be appropriately small, if the windmill is operated for a certain period of time, the windmill nail and the shaft hole (insertion passage, Dust generated by wear on the inner wall of the insertion hole) or dust flying around the game area accumulates in the gap and becomes clogged, and it is not possible to maintain a period during which smooth rotation can be realized for a long period of time. It was.
The present invention has been made in view of such problems, and has an object to provide a ball game machine including a windmill capable of maintaining smooth rotation over a long period of time.

  The invention according to claim 1, which has been made in order to solve the above-mentioned problems, relates to a ball game machine equipped with a windmill that affects the falling direction of a game ball falling on a game area of a game board.

The windmill of this ball and ball game machine includes a windmill nail that is planted in the game area along the front-rear direction, and a rotating portion that is pivotally supported by the windmill nail. A bearing cylindrical portion formed by penetrating an insertion hole through which a nail can be inserted from an inlet opened at the front end portion to an outlet opened at the rear end portion, and a radial line on the outer periphery of the bearing cylindrical portion. It is comprised by the extended several blade | wing part and the decorative disc part provided orthogonally to the front-end part of a bearing cylindrical part.
Furthermore, a dust container is formed on the inner peripheral surface of the insertion hole so as to penetrate from the inner peripheral surface to the outer peripheral surface of the bearing cylindrical portion .

By configuring in this way, even if the gap between the windmill nail and the insertion hole of the windmill is set to be appropriately small and operated for a certain period, the windmill nail and the inner peripheral surface of the insertion hole are worn by the rotation of the windmill. The generated dust or dust flying in the game area accumulates in the dust container and does not accumulate in the gap and cause clogging, so it is possible to maintain a period during which smooth rotation can be realized for a longer period of time. It becomes possible.
In addition, since the dust container for accommodating dust and the like is provided on the inner peripheral surface of the insertion hole, the centrifugal force generated by the rotation of the windmill causes the dust container to be formed outward from the inner peripheral surface from the center of rotation. The dust is displaced and can be easily stored. Furthermore, since the stored dust is pressed toward the outermost side of the dust storage portion by the centrifugal force and is firmly pressed and solidified, the risk of backflowing into the gap and causing clogging is reduced.

  Moreover, the structure by which a dust accommodating part is provided in groove shape along the rotating shaft direction of a windmill is suitable. By comprising in this way, when a bearing cylinder part is shape | molded with a plastic etc., a process can be made easy and it becomes possible to aim at cost reduction.

  Moreover, the structure which provides a dust accommodating part in the position of a several location and equal index angle on a radial line from the rotation center of a windmill is preferable. Thereby, since the gravity center of a windmill and the rotation center correspond, it becomes easy to implement | achieve smooth rotation. However, a method of providing only one place may be adopted.

  Further, the dust container may be formed deeper from the center of rotation toward the outer side as it advances from the inlet or outlet of the insertion hole to the inside. By doing in this way, the volume which a dust accommodating part can accommodate increases, and since more dust can be accommodated, it becomes possible to maintain smooth rotation over a further long period of time.

  Moreover, when forming a dust accommodating part in groove shape, you may make it form spirally from the entrance of an insertion hole toward an exit. By configuring in this way, the total length of the groove is longer than when formed in a straight line from the entrance to the exit of the insertion hole, thereby increasing the volume that can be accommodated by the dust container, and more Therefore, smooth rotation can be maintained over a longer period of time. In addition, by forming in a spiral shape, the angle at which the groove-shaped formation of the dust container starts and the angle at which the wind turbine nail contacts the spiral nail becomes a spiral angle, so there is little resistance and it will not get caught Smoother rotation can be realized.

  Moreover, the dust accommodating part may not be the structure which continued toward the inlet_port | entrance or exit of an insertion hole. For example, it may be configured intermittently. Further, it may be provided only near the entrance of the insertion hole or only near the exit. Further, it may be provided only near the entrance and near the exit. Conversely, it may be provided only in portions other than the vicinity of the entrance and the vicinity of the exit. The installation location of the dust container can be set as appropriate. By doing in this way, it is possible to set freely in the location where a dust accommodating part can accommodate dust effectively, and a freedom degree in design improves.

Further, when the dust container is configured not to be continuous toward the inlet or the outlet of the insertion hole, for example, a plurality of dust container parts that are recessed with a predetermined area and shape on the inner peripheral surface of the insertion hole are scattered. It is possible to make it. Even if comprised in this way, the effect of this invention can be show | played.
Further, when the dust container is not continuous toward the inlet or outlet of the insertion hole in this way, it does not form a bottom with a predetermined depth, but penetrates directly to the outer peripheral surface of the bearing cylindrical portion. It may be provided. Thereby, since dust is discharged to the outside of the windmill, the gap between the windmill nail and the insertion hole is not clogged. Moreover, even if it operates for a considerably long period of time, the dust container will not be filled with dust and will not flow backward.

The shaft receiving cylindrical shaped portion may be provided with a rear protrusion at the outlet of the front convex portion or through hole to the inlet of at least the insertion hole.

By doing so, the neck portion of the windmill nail abuts on the front convex portion provided at the entrance of the insertion hole, so that the friction caused by the rotation of the windmill is greater than the entire front end portion of the bearing cylindrical portion abuts. The force is reduced, and smooth rotation can be easily maintained. Or, since the surface of the game area abuts on the rear convex portion provided at the outlet of the insertion hole, the friction force due to the rotation of the windmill is reduced rather than the entire rear end portion of the bearing cylindrical portion abuts, Smooth rotation can be easily maintained.
Moreover, it becomes easier to show the said effect by providing both a front side convex part and a rear side convex part.

The shaft receiving cylindrical shaped portion is provided with a first bearing member including a front portion and a second bearing member comprising a rear end, and press-fitting the first bearing member to the front end portion of the second bearing member formed The insertion hole is provided in the first bearing member and is formed with substantially the same diameter as the shaft diameter of the windmill nail, and is provided in the second bearing member and substantially the same as the shaft diameter of the windmill nail. You may comprise by the 2nd penetration hole part formed with a diameter, and the 3rd penetration hole part formed with a larger diameter than this 2nd penetration hole part.

  By doing so, the windmill nail is supported by the first insertion hole and the second insertion hole, and not supported by the third insertion hole. Therefore, the portion of the insertion hole related to the third insertion hole has a frictional force. It does not occur and smooth rotation can be realized.

It is a front view of the pachinko machine in a first embodiment. It is a front view of the game board in the first embodiment. It is the front view and side view of a windmill in a first embodiment. It is a schematic perspective view which shows the assembly | attachment state and disassembly state of the windmill in 1st embodiment. It is the schematic which shows the front side convex part and rear side convex part of the windmill in 1st embodiment. It is a schematic sectional drawing which shows the attachment state of the windmill in 1st embodiment. It is the schematic which shows the 1st bearing member in the modification of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment of the present invention is not limited to the following embodiment, and can take various forms as long as they belong to the technical scope of the present invention.

[First embodiment]
First, an overall configuration of a pachinko machine 50 as a ball game machine according to the first embodiment will be described with reference to FIG.
In the following description with reference to the drawings, when the direction, orientation, positional relationship, and the like are shown, the pachinko machine 50 (shown in FIG. 1) installed on the gaming machine installation island and located facing the player. The right direction is described as the right, right side, right side, right side direction, right direction, and so on.
Further, the left direction will be described as left, left side, left side, left side, left direction, and the like.
Further, the ceiling direction will be described as upper, upper, upper, upward, etc., based on the pachinko machine 50 (state shown in FIG. 1).
Further, the floor orientation will be described as down, down, down, down, etc., based on the pachinko machine 50 (state shown in FIG. 1).
Also, with the pachinko machine 50 (the state shown in FIG. 1) as a reference, the player (front) side direction is the front, front side, front, front direction, front side, front side, front side direction, front, front side, front side This will be described as the front direction.
Further, with the pachinko machine 50 (the state shown in FIG. 1) as a reference, the direction of the inside of the gaming machine installation island is as follows: rear, rear, rear, rear, back, back, back, back, back, back , The back side, the back direction, etc.
As described above, in the following description of the drawings, even if the viewpoint and the viewpoint are individually changed, the description is made based on the terms related to the defined direction. In the description of the site, etc., even if the terms described above are combined with the terms such as “part” and “surface”, the direction is of course complying with the above provisions.

  As shown in FIG. 1, a pachinko machine 50 as a ball game machine according to the first embodiment has a structure in which each component is held by an outer frame 51 that forms a vertically long fixed outer frame. A hinge 53b is provided on the left upper side of the outer frame 51, and a hinge 53a is provided on the lower left side. The front frame (glass frame) 52 in which the plate glass 61 is fitted by the hinges 53a and 53b, and the front frame 52 The rear inner frame 60 is configured to be openable and closable with respect to the outer frame 51. Further, a game board 101 (see FIG. 2) held by the inner frame 60 is provided in the back of the plate glass 61 of the front frame 52.

  Speakers 66 are installed on both the left and right sides of the upper part of the front frame 52, so that game sounds are output, thereby improving the game preference. Further, the front frame 52 is provided with an LED for notifying a game abnormality, in addition to a frame-side decorative lamp 65 that emits light according to the gaming state.

  An upper plate 55 and a lower plate 63 are integrally formed at the lower portion of the front frame 52. Further, a launch handle 64 is provided on the right side of the lower plate 63, and the launch device is operated by operating the launch handle 64 in the clockwise direction, so that the game ball supplied from the upper plate 55 is placed on the game board 101. Fired towards.

  The lower plate 63 is configured to receive an award ball overflowing from the upper plate 55, and the game balls accumulated in the lower plate 63 are moved to a dollar box provided in the game store by operating a ball removal lever. Can do. An effect button 67 and a jog dial 68 are provided at the center of the upper plate 55.

  The pachinko machine 50 is a so-called CR machine, which includes a prepaid card unit (CR unit) 56 for reading and writing a prepaid card, and a ball rental button 57, a settlement button 58, a balance on the right side of the upper plate 55. A display 59 is provided.

  1 is a cylinder lock that locks the front frame 52 and the inner frame 60 to the outer frame 51. When a predetermined key is inserted into the cylinder lock 39 and the key is operated clockwise, the inner frame When 60 is opened and operated counterclockwise, the front frame 52 is opened.

  In addition, a curtain plate 54 formed in the shape of a horizontally long flat plate and provided with an illustrated design is provided on the front surface and the lowermost portion of the pachinko machine 50 to improve the decoration of the pachinko machine 50. The curtain plate 54 is attached to the lower part and the front surface of the outer frame 51.

  As shown in FIG. 2, the game board 101 has a substantially circular game area 103 surrounded by rails 102. On the front side of the game area 103, a center case 105 is mounted at the center, and a normal symbol operation gate 117 is installed on the left side of the center case 105. When the game ball passes through the normal symbol operation gate 117, a plurality of types of random numbers for the normal symbol winning / nothing lottery are extracted, and whether or not to win (normal symbol lottery) based on the extracted random numbers is performed.

  Immediately below the center case 105 are a first start port 111 and a second start port 112 where a big hit lottery with a variation display of a special symbol (also indicated as a special view) is performed due to the entry of a game ball. Are arranged side by side. The pachinko machine 50 includes one special symbol that varies depending on the ball entering the first start port 111 and the ball entering the second start port 112. The first start port 111 is configured so that a game ball can always enter, while the second start port 112 is configured as a normal electric accessory that is opened by winning in the normal symbol lottery, Only be allowed to enter.

When a game ball enters the first start port 111 and the second start port 112, a plurality of types of random numbers corresponding to the special drawing are extracted and stored as reserved storage.
The second start port 112 configured as a normal electric accessory is opened for a predetermined time when winning in the normal symbol lottery.

  Below the second starting port 112, there is disposed a big winning port 114 made of a special electric accessory that is opened in the case of a big hit game performed when the big hit lottery is won. In the lower left area of the game area 103, a plurality of general winning ports 131 to 134 are arranged.

  In the lower right area of the game board 101, there are a 7-segment special figure display device 41, a special figure holding number display device 42 consisting of four LEDs, and a normal symbol display device 43 consisting of two LEDs. A general-purpose holding number display device 44 composed of four LEDs is installed.

  The center case 105 of the game board 101 shown in FIG. 2 is provided with an LCD panel of an effect symbol display device 36 (not shown in its entirety) in the center. By performing the notification display or the like, a symbol effect and various notification effects for notifying the result of the big hit lottery corresponding to the special figure are performed.

In addition, the center case 105 is provided with a warp inlet, a warp rod, a stage, and the like, as is well known.
A number of game nails 104 are planted in the game area 103 of the game board 101, and an out port is provided at the bottom of the board surface. When the launched game ball reaches the game area 103, it collides with the game nail 104 or the like to change the flow down (falling) direction, and enters or exits the above various winning holes. In this case, it flows into the outlet and is taken into the aircraft.

  Further, the left area of the game area 103 of the game board 101 is provided with a windmill 70 that changes the falling direction of the game ball, similar to the game nail 104. The windmill 70 includes a main part of the present invention, and the windmill 70 will be described below.

With reference to FIG.3 and FIG.4, first, schematic structure of the windmill 70 is demonstrated.
As shown in FIGS. 3 and 4A, the windmill 70 includes a windmill nail 71, a windmill base 72 pivotally supported (axially supported) on the windmill nail 71, and the front surface of the windmill base 72. A front bearing member 73 that is press-fitted to the side and rotates as the windmill base 72 rotates is provided.

  As will be described in detail later, the windmill nail 71 is inserted through the first insertion hole 88 of the front bearing member 73 and the second insertion hole 77 of the windmill base 72 and forward of the game area 103 of the game board 101. Planted from.

  The wind turbine base 72 includes a rear bearing member 74 formed in a substantially cylindrical shape, three blade portions 76 extending outward from the outer peripheral surface of the rear bearing member 74, the blade portions 76, and the rear bearing member. And a substantially disc-shaped decorative disc portion 75 provided so as to be orthogonal to the front end surface portion of the rear bearing member 74 at a front position 74.

  As shown in the front view of FIG. 3, the three blade portions 76 of the present embodiment are formed in a substantially thin plate shape and are at positions where the indexing angle is equally divided by 120 degrees around the rotation axis of the windmill 70. Is provided.

  Further, the decorative disc portion 75 of the present embodiment is formed in a bowl shape toward the rear at the center on the front side, and the front end portion of the rear bearing member 74 is exposed near the bottom of the bowl shape. It is configured as follows.

With reference to FIGS. 4B and 4C, the configuration of the windmill 70 will be described more specifically, and the assembly procedure of the windmill nail 71, the windmill base 72, and the front bearing member 73 will also be described.
The windmill nail 71 includes a nail head 71a formed in a substantially hemispherical shape, and extends from the flat portion of the nail head 71a toward the rear in the figure and is formed in a substantially cylindrical shape having a predetermined shaft diameter. A nail body 71b. The rear end portion of the nail body 71b is formed in a substantially conical shape.

The front bearing member 73 is formed in a substantially stepped cylindrical shape. Specifically, a press-fit shaft portion 85 is provided at the rear end of the drawing, a flange portion 86 formed with an outer diameter larger than the shaft diameter of the press-fit shaft portion 85 is provided in front of the press-fit shaft portion 85 in the drawing, and the flange portion is further provided. A first convex portion 87 that protrudes toward the front side and is formed in a substantially ring shape is provided in front of the drawing 86.
Further, the front bearing member 73 has a first insertion hole 88 formed along the front-rear direction. The inner diameter of the first insertion hole 88 is slightly larger than the predetermined shaft diameter of the nail body 71 b of the windmill nail 71, and the nail body 71 b can smoothly rotate in the first insertion hole 88. It is formed in size.

The windmill base 72 has a press-fit hole 79 formed in the front portion of the rear bearing member 74. The press-fitting hole 79 is slightly larger than the shaft diameter of the press-fit shaft portion 85 of the front bearing member 73, and is formed with an inner diameter that does not easily fall out by press-fitting the front bearing member 73 into the press-fit shaft portion 85. . The press-fit hole 79 communicates with a third insertion hole 80 and a second insertion hole 77 described later, and the windmill nail 71 can be inserted in the rear bearing member 74 in the front-rear direction.
The configuration of the rear portion of the windmill base 72 will be described with reference to FIG. 4C, which is a view of the windmill base 72 viewed from the left rear. The rear end portion of the rear bearing member 74 described above includes a second convex portion 92 that protrudes further toward the rear side and is formed in a substantially ring shape.
Furthermore, the rear bearing member 74 is provided with the above-described second insertion hole 77 along the front-rear direction. The inner diameter of the second insertion hole 77 is slightly larger than the predetermined shaft diameter of the nail body 71 b of the windmill nail 71, and the nail body 71 b can smoothly rotate in the second insertion hole 77. It is formed in size.

The windmill nail 71, the windmill base 72, and the front bearing member 73 having the above-described schematic configuration are assembled by the following assembly procedure to form the windmill 70.
That is, referring to FIG. 4B, first, the press-fit shaft portion 85 of the front bearing member 73 is press-fitted into the press-fit hole portion 79 of the wind turbine base 72 from the front. Subsequently, the rear end portion formed in the conical shape of the nail body portion 71b of the windmill nail 71 is moved from the first insertion hole portion 88 of the front bearing member 73 through the third insertion hole portion 80 described later to the rear bearing member. It can be assembled in the state of the windmill 70 in FIG. 4A by being inserted through the second insertion hole 77 of 74 and protruding rearward.
Further, in the state in which the windmill 70 is assembled in this manner, the windmill nail 71 is inserted and the insertion hole configured by the first insertion hole 88, the third insertion hole 80, and the second insertion hole 77 described above. Is formed on the rear end surface of the rear bearing member 74, that is, the rear end surface of the second convex portion 92, starting from the insertion hole inlet 90 formed in the front end portion of the front bearing member 73, that is, the front end surface of the first convex portion 87. The insertion hole outlet 91 is configured as an end point.
In this state, the rear end portion formed in the conical shape of the nail body 71b of the windmill nail 71 is implanted from the front to the rear of the game area 103 of the game board 101. The windmill 70 is disposed on the game board 101 (see FIG. 6).

Although the windmill 70 of this embodiment is equipped with the schematic structure demonstrated above, the 1st dust accommodating part 89, the 2nd dust accommodating part 78, and the 1st convex part 87 which are the principal parts of this invention next. A specific configuration of the second protrusion 92 will be described with reference to FIG. In addition, since the schematic structure of the 1st convex part 87 and the 2nd convex part 92 has already been demonstrated, a more detailed structure is demonstrated.
FIG. 5A is a front view and a side view of the front bearing member 73, and FIG. 5B is a side view and a rear view of the rear end portion of the rear bearing member 74.
As shown in FIG. 5 (A), the front bearing member 73 is provided with the first insertion hole portion 88 penetrating from the front toward the rear at the center in the front view. An insertion hole inlet 90 serving as an inlet of the first insertion hole 88 is formed in the front end surface of the front bearing member 73, in other words, the front end surface of the first protrusion 87.

  Further, the front bearing member 73 is provided with four first dust accommodating portions 89 facing outward from the first insertion hole portion 88 when viewed from the front. Specifically, the four first dust accommodating portions 89 are arranged at positions along radial lines from the rotation center of the front bearing member 73 in the vertical and horizontal directions (an indexing angle is uniformly 90 degrees) and the front bearing member. 73 is formed in a linear groove shape from the front end to the rear end. In this embodiment, the depth of the groove shape is formed constant.

Further, as described above, the front bearing member 73 is provided with the first convex portion 87 protruding from the front end surface of the flange portion 86 further forward. As described above, the first convex portion 87 is formed in a substantially ring shape. Further, the first convex portion 87 of the present embodiment is formed with a radius larger than the length from the rotation center of the front bearing member 73 to the groove-shaped bottom portion of the first dust accommodating portion 89. That is, when viewed from the front, four first dust accommodating portions 89 and first insertion hole portions 88 are provided inside the circular region of the first convex portion 87.
Further, the size (outer diameter) of the first convex portion 87 will be described in detail. The outer diameter of the first convex portion 87 is formed to be smaller than the outer diameter of the flat portion (neck portion) of the nail head portion 71a with which the front end surface of the first convex portion 87 abuts in the assembled state (FIG. 6). reference).
In the case of the embodiment that does not include the first dust accommodating portion 89, the outer diameter of the first convex portion 87 is smaller than the outer diameter of the flat surface portion (neck portion) of the nail head portion 71a and the first insertion portion The outer diameter of the hole 88 is preferably larger.

As shown in FIG. 5B, the rear bearing member 74 of the wind turbine base 72 is provided with the above-described second insertion hole 77 penetrating from the rear toward the front in the center in the rear view. An insertion hole outlet 91 serving as an outlet of the second insertion hole 77 is formed in the rear end surface portion of the rear bearing member 74, in other words, in the rear end surface portion of the second convex portion 92.
The second insertion hole 77 is formed forward from the rear end surface of the second protrusion 92 at a predetermined depth in the drawing, communicates with the second insertion hole 77, and slightly further forward. A third insertion hole 80 is provided in a taper shape that extends in the direction. The inner diameter of the third insertion hole 80 is larger than the inner diameter of the second insertion hole 77, in other words, larger than the predetermined shaft diameter of the nail body 71b. As described above, the third insertion hole 80 further communicates with the front press-fitting hole 79.

  Further, the rear bearing member 74 is provided with four second dust accommodating portions 78 facing outward from the second insertion hole 77 in the rear view. Specifically, the four second dust accommodating portions 78 are arranged at positions along radial lines from the rotation center of the rear bearing member 74 in the vertical and horizontal directions (the indexing angle is uniformly 90 degrees) and the rear bearing member. From the rear end of 74 to the front (to the front end of the second insertion hole 77), a linear groove shape is provided. In this embodiment, the depth of the groove shape is formed constant.

Further, the rear bearing member 74 is provided with a second convex portion 92 projecting further forward from the rear end surface. As described above, the second convex portion 92 is formed in a substantially ring shape. The second convex portion 92 of the present embodiment is formed with a radius larger than the length from the rotation center of the rear bearing member 74 to the groove-shaped bottom portion of the second dust accommodating portion 78. That is, when viewed from the rear, four second dust accommodating portions 78 and second insertion hole portions 77 are provided inside the circular region of the second convex portion 92.
In the assembled state, the rear end surface of the second convex portion 92 abuts on the front surface portion of the game area 103 (see FIG. 6).
In the case of the embodiment that does not include the second dust container 78, the outer diameter of the second protrusion 92 is larger than the outer diameter of the second insertion hole 77 and smaller than the outer diameter of the rear bearing member 74. Preferably formed.

Next, the effect | action of the windmill 70 of this embodiment is demonstrated with reference to FIG. FIG. 6 is a schematic cross-sectional view showing a state in which the windmill 70 is disposed on the game board 101.
When a game ball (not shown) flowing down from the front and upper side of the game area 103 collides with the blade portion 76, the windmill 70 is pivotally mounted on the nail body 71b and rotates clockwise or counterclockwise. Change the falling direction of the game ball. When the windmill 70 rotates in this way, dust generated by friction between the nail body portion 71b and the first insertion hole portion 88 or the second insertion hole portion 77, the flat portion (neck portion) of the nail head portion 71a, and the first Dust generated by friction with the front end of the convex portion 87, dust generated by friction between the front portion of the game area 103 and the rear end of the second convex portion 92, the front side of the game area 103 and the plate glass 61 Dust or the like floating in the space formed on the rear side enters the gap between the nail body 71 b and the first insertion hole 88 or the second insertion hole 77. Such dust or dust is displaced to the first dust accommodating portion 89 or the second dust accommodating portion 78 by vibration caused by rotation or the like, and is accommodated therein.
The accommodated dust or the like is displaced and accumulated at a position separated from the outside, that is, from the gap between the nail body 71 b and the first insertion hole 88 or the second insertion hole 77 by the centrifugal force generated by the rotation of the windmill 70.
The accumulated dust is further hardened by centrifugal force, so that it is difficult for the dust to flow backward in the direction of the gap.
Therefore, smooth rotation can be continued for a longer period without clogging dust or the like in the gap.

  Moreover, since the outer diameter of the 1st convex part 87 is formed smaller than the outer diameter of the plane part (neck part) of the nail head 71a, even if both contact | abut by rotation, the whole plane part will rub. Since a smaller frictional force is generated, smooth rotation can be sustained for a longer period.

  Further, since the outer diameter of the second convex portion 92 is formed larger than the outer diameter of the second insertion hole portion 77 and smaller than the outer diameter of the rear bearing member 74, Even if the surface of the game area 103 comes into contact with the rotation, the frictional force generated is smaller than the end surface formed by the outer diameter of the rear bearing member 74 rubs, so that smooth rotation can be continued for a longer period of time. can do.

  Further, the bearing cylindrical portion of the windmill 70 that supports the nail barrel portion 71b is constituted by the rear bearing member 74 and the front bearing member 73, and the nail insertion hole of the windmill 70 is directed from the front to the rear so that the nail barrel portion The first insertion hole 88 is formed with a slightly larger inner diameter that is substantially the same as the shaft diameter of 71b, and then formed larger than the shaft diameter of the nail barrel 71b (the inner diameter of the second insertion hole 77). The third insertion hole 80, and then the second insertion hole 77 formed with a slightly larger inner diameter substantially the same as the shaft diameter of the nail body 71b. Thereby, the site | part which concerns on the 3rd penetration hole 80 of the penetration holes does not produce friction, but can maintain smooth rotation over a long period of time. In addition, since the bearing cylindrical portion is configured by the rear bearing member 74 and the front bearing member 73, a configuration in which only the front end and the rear end are supported can be easily formed.

[Modification]
A modification of the present invention will be described with reference to FIG. Since this modification is almost the same as the configuration of the first embodiment described above, only the differences according to this modification will be described, and the same configuration will be omitted for convenience. FIG. 7 is a schematic view showing the front bearing member 173 in a modified example of the present invention.
As shown in FIG. 7A, the front bearing member 173 is provided with a first insertion hole 188 penetrating from the front toward the rear at the center in the front view.
Further, the front bearing member 173 is provided with three first dust accommodating portions 189 facing outward from the first insertion hole portion 188 when viewed from the front. Specifically, the three first dust accommodating portions 189 are located at positions along radial lines with an index angle of 120 degrees from the rotation center of the front bearing member 73 and from the front end of the front bearing member 173. It is provided in a curved groove shape that bulges outward from the center of rotation over the end. More specifically, the depth of the groove is deeper at the center portion in the front-rear direction.
By being configured in this way, even if the first dust accommodating portion 189 is provided in a groove shape from the front end to the rear end of the front bearing member 173, the volume capable of accommodating the dust in the first dust accommodating portion 189. Therefore, smooth rotation can be continued for a longer period of time.
In addition, you may employ | adopt the said structure not only for the front bearing member 173 but for a rear bearing member.

As mentioned above, although embodiment which concerns on this invention has been described, it is not limited to this, You may employ | adopt another structure, unless it deviates from the technical scope of this invention.
For example, the first dust container and the second dust container are not limited to those that are linearly formed in the front-rear direction, and the groove-shaped dust container is formed in a spiral shape in the front-rear direction. May be. As a result, in the section from the front end portion to the rear end portion of the bearing cylindrical portion, the volume of the dust storage portion that can store dust can be made larger than the groove-shaped dust storage portion formed linearly. As a result, smooth rotation can be continued for a longer period of time.
In the embodiment and the modification described above, the example in which the bearing cylindrical portion of the present invention is divided into the front bearing member (first bearing member) and the rear bearing member (second bearing member) is shown. However, the present invention is not limited to this, and a single structure that is not divided may be used. Even in such a state, the effect of the present invention is achieved by providing the dust container on the inner peripheral surface of the insertion hole.

[Correspondence with Claims]
The correspondence between the terms used in the description of the above embodiment and the terms used in the description of the claims is shown.

  The configuration in which the front bearing member 73 is assembled to the windmill base 72 corresponds to the rotating portion.

  The first insertion hole 88, the press-fitting hole 79, the third insertion hole 80, and the second insertion hole 77 correspond to the insertion hole.

  The front end surface portion of the front convex portion 87 corresponds to the front end portion.

  The insertion hole inlet 90 corresponds to the inlet.

  The rear end surface portion of the rear convex portion 92 corresponds to the rear end portion.

  The insertion hole outlet 91 corresponds to the outlet.

  A configuration in which the front bearing member 73 and the rear bearing member 74 are assembled corresponds to the bearing cylindrical portion.

  The first dust container 89 and the second dust container 78 correspond to the dust container.

  The first convex portion 87 corresponds to the front convex portion.

  The second convex portion 92 corresponds to a rear convex portion.

  The front bearing member 73 corresponds to a first bearing member.

  The rear bearing member 74 corresponds to a second bearing member.

  The first convex portion 187 corresponds to the front convex portion.

  The front bearing member 173 corresponds to the first bearing member.

50: Pachinko machine 51: Outer frame 60: Inner frame 70: Windmill 71: Windmill nail 71a: Nail head 71b: Nail barrel 72: Windmill base 73: Front bearing member (first bearing member)
74: Rear bearing member (second bearing member)
75: decorative disc part 76: blade part 77: second insertion hole part 78: second dust accommodating part 79: press-fitting hole part 80: third insertion hole part 85: press-fitting shaft part 86: flange part 87: first convex Part (front convex part)
88: 1st insertion hole part 89: 1st dust accommodating part 90: Insertion hole entrance (inlet)
91: Insertion hole exit (exit)
92: Second convex portion (rear convex portion)
101: Game board 103: Game area 173: Front bearing member (first bearing member)
185: Press-fit shaft portion 186: Flange portion 187: Front convex portion (first convex portion)
188: First insertion hole 189: First dust container

Claims (1)

In a ball game machine equipped with a windmill that affects the falling direction of the game ball falling on the game area of the game board,
The windmill includes a windmill nail that is planted along the front-rear direction in the game area, and a rotation portion that is pivotally supported by the windmill nail.
The rotating part is
A cylindrical bearing portion formed by penetrating an insertion hole through which the windmill nail can be inserted from an inlet opened at a front end portion to an outlet opened at a rear end portion;
A plurality of blade portions extending radially on the outer periphery of the bearing tubular portion;
A decorative disc portion provided orthogonal to the front end portion of the bearing tubular portion,
The inner peripheral surface of the insertion hole is provided with a dust container that penetrates from the inner peripheral surface to the outer peripheral surface of the bearing cylindrical portion .
A ball game machine characterized by that.

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