JP3802982B2 - Game ball launcher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention belongs to the technical field of a game ball launcher mounted on a ball game machine.
[0002]
[Prior art]
Usually, a ball game machine such as a pachinko machine is provided with a game ball launching device for launching a game ball.
Various structures of game ball launching devices have been proposed and put into practical use, but the mainstream is that it is rotatably supported by a bearing held by a receiving tube fixed to a base plate. A drive shaft, a striking ball connected to the drive shaft and swinging forward and backward with the drive shaft as an axis, and a firing spring that increases the amount of elastic deformation and urges the striking ball in the forward direction along with the backward swing of the striking ball A hit arm that is connected to the drive shaft or the hitting ball and rotates together with the hitting ball, an arm pin that is fixed to the tip of the hit arm with the axial direction being substantially perpendicular to the rotation surface of the hit arm, and an axis on the arm pin The arm roller to be supported, and the drive to rotate the hit arm to the side that reversely displaces the hitting ball by applying a force to the arm roller driven by the motor, and then releasing the arm roller. It is intended and a beam.
[0003]
In the game ball launching device having such a configuration, when the drive cam is rotationally driven by the motor, the drive cam abuts on the arm roller to exert a force. The force exerted on the arm roller acts on the hit arm via the arm pin, and swings and displaces the hit arm toward the side where the hitting ball is moved backward. Along with this, the striking ball is also displaced backward, and the firing spring increases the elastic deformation and the urging force is increased by the amount of the reciprocating displacement of the striking ball. When the drive cam continues to rotate and the drive cam disengages from the arm roller, the hit arm, that is, the force that has caused the hitting ball to move backward is released, so that the hitting ball is rapidly advanced by the biasing force of the firing spring. A game ball placed at the end of the launch rail is hit and fired.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional game ball launching device, the vibration of the motor is transmitted to a base plate that supports each part of the game ball launching device and also serves as a member for mounting on the ball game machine, and generates vibration sound due to resonance. There was a thing. If this vibration sound (usually a sound such as “jijijiji”) is heard, the player may be uncomfortable, and countermeasures have been demanded.
[0005]
Conventionally, it is considered that this vibration is transmitted via a pin or the like that is erected on the base plate and supports the motor. For example, a rubber packing is interposed between the pin and the motor. Although measures were taken, it was not enough to prevent vibration noise.
For this reason, the inventor has repeatedly studied, and the transmission of vibration through the pin that supports the motor is rather subordinate, and the transmission of vibration through the contact point between the drive cam and the arm roller is rather As a result, the present invention has been completed.
[0006]
That is, in the game ball launching device having the above-described configuration, the driving force of the motor is transmitted to the hit arm side at the contact point between the driving cam and the arm roller, so that the arm roller is required to have strength and durability. For example, sintered metal, engineering plastic, Duracon (trade name) and the like have been used. However, when such a hard material such as sintered metal is used as the arm roller, the vibration of the motor is transmitted very efficiently (transmitted without being damped) through the contact point between the drive cam and the arm roller. The base plate resonated and produced vibration noise. In particular, in a motor having a structure in which minute amounts of displacement (steps) are stacked and rotated, such as a stepping motor, the minute amount of displacement itself is transmitted as vibration, and the generation of vibration noise is remarkable.
[0007]
An object of the present invention is to prevent the generation of vibration sound due to motor vibration in a game ball launching apparatus.
[0008]
[Means for Solving the Problems and Effects of the Invention]
  A game ball launching device according to claim 1 for solving the above-mentioned problem, a drive shaft rotatably supported by a bearing held by a receiving cylinder fixed to a base plate, and a drive shaft coupled to the drive shaft. A striking ball that moves forward and backward around the shaft, a firing spring that increases the amount of elastic deformation with the backward movement of the striking ball and biases the striking ball in the forward direction, and the drive shaft or the hitting ball A hit arm that is connected to the hitting ball and is pivotally supported by the arm pin, and an arm pin that is fixed to the tip of the hit arm with the axial direction being substantially perpendicular to the rotation surface of the hit arm. An arm roller and a drive that is driven to rotate by a motor and then releases the arm roller after swinging and displacing the hit arm to the side that reversely displaces the hitting ball by applying a force to the arm roller. In the game ball launcher and a beam,
  The arm roller is composed of a roller body and a surface rubber fitted to the outer periphery thereof,
  A groove is provided on the outer periphery of the roller body,
  A protrusion provided on the surface rubber is engaged with the groove to prevent the surface rubber from falling off.
  The game ball launcher according to claim 1, wherein the arm roller is composed of a roller main body and a surface rubber fitted on the outer periphery thereof.Therefore, even if the vibration of the motor reaches the drive cam, the vibration of the arm rollerSurface rubberAnd is not transmitted to the members other than the motor and the drive cam, such as the arm roller side, that is, the base plate, and noise caused by resonance with the vibration of the motor does not occur.
  Further, a groove was provided on the outer periphery of the roller body, and a protrusion provided on the surface rubber was engaged with the groove to prevent the surface rubber from falling off.
[0009]
  A game ball launching device according to claim 2 is the game ball launching device according to claim 1,The corner portion between the outer peripheral surface and the end surface of the roller body is chamfered, and the surface rubber is provided with a convex portion having a triangular cross section corresponding to the chamfered portion.
  The game ball launcher according to claim 1 or 2,The base plate and the motor are connected to each other by using a buffer connecting member having a rubber buffer shaft and a pair of bolts fixed to both ends of the buffer shaft.if,Vibration is prevented from being directly transmitted from the motor to the base plate, and resonance caused by such vibration transmission is prevented. Therefore, noise caused by resonance with motor vibration can be more reliably prevented.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be specifically described with reference to the drawings.
[0011]
【Example】
As shown in FIG. 1, the game ball launching apparatus 10 of this embodiment has a structure in which each part is supported by a metal base plate 12. The base plate 12 is provided with a pair of motor support pins 14 as buffer connection members. As shown in FIG. 2, the motor support pin 14 has a shock absorbing shaft 20 made of urethane rubber sandwiched between the other surfaces of the metal plate 18 with the bolts 16 fixed on one surface, and the metal plate 18 and the shock absorbing shaft 20. Vulcanized and bonded. As shown in FIG. 1, these motor support pins 14 are fixed by nut tightening with one bolt 16 penetrating the base plate 12. The stepping motor 22 as a drive source is attached to the base plate 12 by passing the other bolt 16 of the motor support pin 14 through the bolt hole 24 and tightening it with a cap nut 26.
[0012]
Thus, when the stepping motor 22 is attached to the base plate 12, the drive cam 30 attached to the output shaft 28 of the stepping motor 22 is applied to the arm roller 34 attached to the hit arm 32 via the arm pin 31. It becomes the corresponding position. When the stepping motor 22 operates and the drive cam 30 rotates, the drive cam 30 abuts against the arm roller 34 and presses it, causing the hitting arm 36 and the hitting ball 36 to swing and move backward, and further the drive cam. When 30 rotates, the drive cam 30 is released from the arm roller 34 to release the pressing force, so that the hit arm 32 and the hitting ball 36 can be returned to the forward side, and a later-described winding spring 96 (not shown in FIG. 1). The ball is advanced by the urging force of (), and a game ball on a firing rail (not shown) is hit by the ball spring 38 at the tip.
[0013]
As shown in FIG. 3, the arm pin 31 includes a head 31a, a support shaft 31b, and a fitting shaft 31c. The support shaft 31b passes through the arm roller 34, and the fitting shaft 31c is fitted to the tip of the hit arm 32. ing. Therefore, the arm roller 34 is restricted from moving in the axial direction by the head 31a and the hit arm 32, but is rotatable about the support shaft 31b. Further, the hit arm 32 is provided with a square hole 32a through which a drive shaft 72 described later is passed.
[0014]
As shown in FIG. 4, the arm roller 34 comprises a roller body 34a made of sintered metal and a surface rubber 34b made of urethane rubber fitted on the outer surface thereof. A groove 34c is provided in the roller body 34a, and a protrusion 34d of the surface rubber 34b is engaged with the groove 34c, and this engagement prevents the surface rubber 34b from falling off. The surface rubber 34b has a thickness of 0.8 mm including the ridge 34d, and the other portion is 0.3 mm.
[0015]
Returning to FIG. 1, the base plate 12 is provided with an upper stopper rubber 40 and a lower stopper rubber 42 for defining a forward movement position of the hitting ball 36 and absorbing an impact at the time of hitting. A slider mechanism 44 for driving a launch ball supply mechanism (not shown) for supplying game balls one by one is attached.
[0016]
As shown in FIG. 5, the slider mechanism 44 includes a cylindrical case 46 made of plastic and fixed to the base plate 12. The case 46 is provided with a slide hole 46a, and a plastic slide shaft 48 is inserted into the slide hole 46a. The slide shaft 48 includes a base portion 48a that slides in the slide hole 46a, an in-cylinder slide portion 48b, a roller shaft 48c provided at an end on the base portion 48a side, and a core holding portion 48e that is connected to the in-cylinder slide portion 48b. The core holding portion 48e is provided with a groove 48f along the axial direction.
[0017]
The slide shaft 48 is inserted into the slide hole 46a together with the compression spring 50 with the core holding portion 48e inserted through the compression spring 50, and a pair of protrusions 46b protruding into the slide hole 46a are inserted into the groove 48f. Has been. For this reason, the slide shaft 48 can reciprocate up and down in the slide hole 46a, but is prevented from rotating by the protrusion 46b inserted into the groove 48f. The protrusion 46b prevents the compression spring 50 from coming out of the slide hole 46a.
[0018]
Further, the end of the rod pin 52 is fitted into the hole 48g provided at the tip of the core holding portion 48e protruding from the slide hole 46a, and a seated screw 54 penetrating the inside of the rod pin 52 from above is inserted into the screw hole 48h. It is screwed.
On the other hand, a roller 56 is rotatably fitted on the roller shaft 48c, and a slit washer 58 prevents the roller 56 from falling off.
[0019]
As shown in FIG. 1, the slider mechanism 44 abuts the roller 56 against the protruding portion 36 a of the hitting ball 36, and the compression spring 50 biases the slide shaft 48 in a downward direction. That is, the roller 56 is pressed against the protruding portion 36a by the urging force of the compression spring 50, and is always in contact with the protruding portion 36a.
[0020]
As shown in FIGS. 6 and 7, the base plate 12 is provided with a receiving cylinder 60, and a pair of ball bearings 64 a and 64 b as bearings are inserted into the receiving cylinder 60 with a ring spacer 62 interposed therebetween. The receiving tube 60 is provided with two upper and lower spacer holes 60a into which spacers 66 are inserted. The thickness of the spacer 66 is equal to the thickness of the ring spacer 62, and the distance between the ball bearings 64 a and 64 b is maintained by the ring spacer 62 and the spacer 66. A holding cylinder 68 is fitted on the receiving cylinder 60 to prevent the spacer 66 from falling off. In addition, the notch 68a provided in the collar of the holding cylinder 68 shown in FIG.
[0021]
A drive shaft 72 passes through both ball bearings 64a and 64b and the ring spacer 62 in a rotatable manner. A part of the proximal end portion 72a and the distal end portion 72b of the drive shaft 72 is scraped off to form a pair of planes parallel to each other.
First, the base end portion 72a side of each portion connected to or held by the drive shaft 72 will be described. In FIG. 7 referred to in the following description, the upper stopper rubber 40, the lower stopper rubber 42, the slider mechanism 44 and the like are not shown in order to clearly show the structure around the drive shaft 72.
[0022]
As shown in FIGS. 6 and 7, a hit arm 32 is fitted on the base end portion 72a by a square hole 32a in contact with the flange 72c. Next, a shaft groove 36c formed between the protruding portion 36a of the hitting ball 36 and the leg 36b is engaged with the base end portion 72a. Further, an adapter 74 disposed so as to cover the hitting ball 36 is externally fitted to the base end portion 72a by a square hole 74a. As shown in FIG. 6, the adapter 74 is provided with a prismatic projection 74b and a half-moon-like projection 74c. The prism-like projection 74b is smoothly inserted into the shaft groove 36c, and the half-moon-like projection 74c is inserted. Is in contact with the back side of the leg 36b, and the leg 36b is sandwiched between the protrusions 74b and 74c. The adapter 74 is provided with a positioning pin 74d, and the positioning pin 74d is fitted in the pin hole 36d of the ball striking rod 36. Then, as shown in FIG. 7, the nut 76 is tightened so that the hit arm 32, the hitting ball 36 and the adapter 74 are sandwiched between the flange 72 c of the drive shaft 72. For this reason, the hit arm 32 and the hitting ball 36 rotate together with the drive shaft 72.
[0023]
Further, as shown in FIG. 6, the through hole 72d of the drive shaft 72 has a knob mounting portion 78a having an oval cross section, an adjustment cam 78b provided on the opposite side, a knob mounting portion 78a, and an adjustment cam. An adjusting shaft 78 formed of a shaft portion 78c that connects the shaft 78b passes through the shaft 78c (see FIG. 7). As shown in FIG. 7, the knob mounting portion 78 a of the adjustment shaft 78 protrudes from the base end portion 72 a of the drive shaft 72, passes through the hole 80 a of the spring receiver 80 and the preload spring 82 that is a compression coil spring, and further, the ratchet plate 84. The engaging hole 84a of the ratchet cover 86 passes through the engaging hole 84a of the ratchet cover 86 and engages with the engaging hole 88a of the adjusting knob 88.
[0024]
As shown in FIGS. 6 and 7, a tooth surface 86 b made of a radial tooth crest is provided around the insertion hole 86 a of the ratchet cover 86, and the ratchet plate 84 is similar to the portion facing the tooth surface 86 b. Tooth surfaces 84c (not shown in FIG. 6) are provided, and are configured to mesh with each other. In addition, the cross-sectional shape of the tooth crest forming these tooth surfaces 84c and 86b is a mountain shape. Further, the protrusion 86c provided on the inner wall of the ratchet cover 86 corresponds to the notch 84b of the ratchet plate 84, and the relative rotation between the ratchet cover 86 and the ratchet plate 84 is within a range in which the protrusion 86c fits in the notch 84b. Is possible.
[0025]
As shown in FIG. 7, the ratchet cover 86 penetrates the screw hole 86 e of the ratchet cover 86 and the screw hole 80 b of the spring receiver 80 in a state where the ratchet plate 84 and the preload spring 82 are accommodated. It is attached to the adapter 74 by a screw 90 that is screwed into the hole 74e. The adjustment knob 88 has a shaft 88 b inserted through the insertion hole 86 a of the ratchet cover 86, and is screwed to the adjustment mounting portion 78 a of the adjustment shaft 78 with a screw 92. There is a gap between the adjustment knob 88 and the ratchet cover 86, and the adjustment knob 88 can be moved along the axial direction of the adjustment shaft 78.
[0026]
When assembled in this way, the ratchet plate 84 is urged by the preload spring 82 and pressed against the ratchet cover 86, and the ratchet cover 86 is engaged with the tooth surface 86 b of the ratchet cover 86 and the tooth surface 84 c of the ratchet plate 84. The ratchet cover 86 and the ratchet plate 84 rotate around the adjustment shaft 78 and the drive shaft 72 to which the ratchet cover 86 is connected. However, if the adjustment knob 88 is rotated with a force exceeding the set value, the meshing position of the tooth surface 84c of the ratchet plate 84 and the tooth surface 86b of the ratchet cover 86 is changed against the biasing force of the preload spring 82, and the ratchet plate 84 is changed. Can be rotated to change the relative rotational position of the ratchet cover 86 and the ratchet plate 84.
[0027]
Next, the structure of the drive shaft 72 on the distal end portion 72b side will be described with reference to FIGS.
As already described, the drive shaft 72 is held by the ball bearings 64 a and 64 b in the receiving cylinder 60, the adjustment shaft 78 is rotatably passed through the through hole 72 d of the driving shaft 72, and the holding cylinder 68 is provided in the receiving cylinder 60. It is fitted.
[0028]
An adjustment ring 94 having a rotation restricting portion 94c provided continuously to the gear portion 94a, the plurality of spring grooves 94b and the gear portion 94a is rotatably fitted to the receiving tube 60. The rotation restricting portion 94c of the adjustment ring 94 abuts against the stopper 70 shown in FIGS. 6 and 9, and is thereby prevented from rotating in the clockwise direction in FIGS.
[0029]
Further, a winding spring 96 is loosely fitted in the receiving cylinder 60, and one end 96a of the winding spring 96 is locked to one of the spring grooves 94b of the adjustment ring 94 as shown in FIG. . The other end portion 96 b of the winding spring 96 is clamped by a pair of nuts 98 and passes through the long hole 100 a of the torque cap 100 attached to the tip end portion 72 b of the drive shaft 72, and the spring hole of the cam receiving lever 102. It penetrates 102a and is held.
[0030]
The cam receiving lever 102 has a shaft hole 102b supported by one screw receiver 100b of the torque cap 100, and can swing around the screw receiver 100b. An adjustment cam 78b of the adjustment shaft 78 is inserted into a cam receiving hole 102c provided at the center of the cam receiving lever 102. Further, the cam receiving lever 102 is covered with a safety cap 104, and the safety cap 104 is connected to the torque cap 100 by two screws 106 that are screwed into the screw receivers 100 b and 100 c of the torque cap 100.
[0031]
The winding spring 96 is assembled with a basic torsional deformation applied in advance, and exerts an urging force in a direction in which the rotation restricting portion 94 c is pressed against the stopper 70 against the adjustment ring 94, and is applied to the cam receiving lever 102. On the other hand, it exerts a biasing force in the opposite direction. However, as described above, if the adjustment knob 88 is rotated with a force greater than the set value, the ratchet plate 84 can be rotated to change the relative rotational position of the ratchet cover 86 and the ratchet plate 84, as shown in FIG. Thus, the swing position of the cam receiving lever 102 can be changed by the adjustment cam 78b. At this time, if the ratchet cover 86 is oscillated and displaced in the clockwise direction in FIG. 8 (see FIG. 8C), the basic torsional deformation amount of the winding spring 96 increases, and the counterclockwise direction in FIG. If the rocking displacement is made (see FIG. 8D), the basic twist deformation amount of the winding spring 96 is reduced. That is, by performing such an operation, the amount of basic torsional deformation of the winding spring 96 can be adjusted. Then, when the swinging position of the cam receiving lever 102 is set to a desired position (that is, the basic twist deformation amount of the winding spring 96 is set to a desired amount) and the force applied to the adjustment knob 88 is released, the ratchet Since the engagement of the plate 84 and the ratchet cover 86 is restored and the relative rotation between the ratchet plate 84 and the ratchet cover 86 becomes impossible, the swinging position of the cam receiving lever 102 (the basic twist deformation amount of the winding spring 96) is Maintained in a state. In this way, the basic twist deformation amount of the winding spring 96 can be adjusted.
[0032]
Next, a mechanism for the player to adjust the amount of torsional deformation (the strength of the firing force) of the winding spring 96 will be described.
As shown in FIG. 6, the base plate 12 is provided with a gear shaft 110. An adjustment gear 112 is rotatably fitted on the gear shaft 110, and the adjustment gear 112 is screwed into the gear shaft 110. Is prevented from falling off. Further, the coupling 116 is attached by engaging the legs 116 a with the three holes 112 a of the adjustment gear 112. When the game ball launching apparatus 10 is mounted on a ball game machine, the adjustment gear 112 is operated when an operation shaft of an operation dial (not shown) is inserted into the operation shaft hole 116b of the coupling 116 and the player rotates the operation dial. Is rotated.
[0033]
On the other hand, as shown in FIGS. 6, 7, and 9, a guide rail 120 is attached to the base plate 12 with two screws 118, and a rack member 122 is interposed between the guide rail 120 and the base plate 12. Is retained. The rack member 122 is provided with a ridge 122a inserted into the groove 120a of the guide rail 120. The rack member 122 reciprocates along the guide rail 120 by sliding the ridge 122a in the groove 120a. it can. The rack member 122 is provided with two rack grooves of a first rack 122b and a second rack 122c, and the first rack 122b meshes with the adjustment gear 112 as shown in FIG. Further, as shown in FIG. 7, the second rack 122 c meshes with the gear portion 94 a of the adjustment ring 94. Therefore, when the adjustment gear 112 is rotated as described above, the rack member 122 reciprocates along the guide rail 120 and the adjustment ring 94 is rotated. Then, the amount of twist deformation of the winding spring 96 changes.
[0034]
In the game ball launching apparatus 10 configured as described above, when the stepping motor 22 is operated and the drive cam 30 is rotated, the drive cam 30 abuts against the arm roller 34 and presses it together with the hit arm 32. The hitting ball 36 is oscillated and displaced in the backward direction (counterclockwise direction in FIG. 1, clockwise direction in FIG. 6). Accordingly, the drive shaft 72 rotates, and the torque cap 100, the safety cap 104, the adapter 74, and the like connected to the drive shaft 72 rotate together. The rotation of the drive shaft 72 is transmitted to the ratchet cover 86 via the adapter 74 and the spring receiver 80 to rotate it. Then, the ratchet plate 84 engaged with the ratchet cover 86 rotates, and thereby the adjustment shaft 78 also rotates. For this reason, the cam receiving lever 102 rotates together with the torque cap 100, and the amount of twist deformation of the winding spring 96 is increased. That is, the hitting ball 36 is oscillated and displaced backward to increase the amount of twist deformation of the winding spring 96.
[0035]
When the drive cam 30 is further rotated, the drive cam 30 is released from the arm roller 34 to release the pressing force, so that the hit arm 32 and the hitting ball 36 can be returned to the forward side, and the drive shaft 72, the adjustment shaft 78, and these The respective parts connected to each other are returned and rotated in the reverse direction by the repulsive force of the winding spring 96. By the forward swing of the striking ball rod 36 accompanying this return rotation, a game ball on a firing rail (not shown) is hit.
[0036]
At this time, when the player operates the operation dial to rotate the adjustment gear 112 in the clockwise direction in FIG. 9, the rack member 122 moves to the right along the guide rail 120 and the adjustment ring 94 is moved. Since it is rotated counterclockwise, the amount of torsional deformation of the winding spring 96 accompanying the rotation of the drive shaft 72 by the hit arm 32 increases, and the repulsive force of the winding spring 96, that is, the striking force of the hitting ball rod 36 is strengthened.
[0037]
Further, if the player operates the operation dial to reduce the amount of rotation (returns the operation dial), the amount of twist deformation of the winding spring 96 increased as described above can be reduced.
That is, the striking force of the hitting ball rod 36 is (basic deformation amount of the winding spring 96) + deformation amount due to rotation of the drive shaft 72 accompanying the swing displacement of the hit arm 32) + (adjustment ring 94 operated by the player) The amount of deformation due to the rotation of Of these, the basic deformation amount of the winding spring 96 can be adjusted by the operation of the adjustment knob 88, but this is adjusted by the game machine manufacturer or the game store, not by the player. Further, the amount of deformation due to the rotation of the drive shaft 72 is substantially constant. Eventually, the player operates the operation dial to adjust to a desired firing force.
[0038]
If the player releases the operation dial, the external force that has rotated the adjusting ring 94 against the repulsive force of the winding spring 96 is eliminated. The repulsive force rotates in the return direction, the rack member 122 is pulled back, the adjustment gear 112 rotates, and the operation dial returns to the state before the operation. That is, a spring means for returning the operation dial is not necessary.
[0039]
Now, the game ball launching device 10 operating in this way applies the rotational force of the stepping motor 22 as a drive source to the arm roller 34 via the drive cam 30, thereby swinging the hit arm 32 and the hitting ball 36 backward. The drive shaft 72 is rotated.
[0040]
In the conventional game ball launcher, for example, sintered metal, engineering plastic, Duracon (trade name), etc. are used for the arm roller, so that the vibration of the motor is extremely efficient through the contact point between the drive cam and the arm roller. It was transmitted to the base plate side, and for example, the base plate resonated and a vibration sound was emitted. In particular, in a motor having a structure in which minute amounts of displacement (steps) are stacked and rotated, such as a stepping motor, the minute amount of displacement itself is transmitted as vibration, and the generation of vibration noise is remarkable.
[0041]
However, since the arm roller 34 of the game ball launching apparatus 10 of the embodiment is fitted with the surface rubber 34b made of urethane rubber on the outer surface of the sintered metal roller main body 34a, the surface layer of the arm roller 34 is made rubber. Even if the vibration of the stepping motor 22 reaches the drive cam 30, the vibration is attenuated by the surface rubber 34 b of the arm roller 34, and the members other than the stepping motor 22 and the drive cam 30 such as the arm roller 34 side, that is, the base plate 12. No noise is generated due to resonance with the vibration of the stepping motor 22. Even a motor having a structure in which minute amounts of displacements (steps) are stacked and rotated, such as a stepping motor, does not transmit the vibration to the base plate 12, and therefore no noise is caused due to resonance.
[0042]
Further, since the base plate 12 and the stepping motor 22 are connected by using the urethane rubber buffer shaft 20 and the motor support pin 14 having the bolt 16 fixed to both ends of the buffer shaft 20 via the metal plate 18, Vibration is prevented from being directly transmitted from the stepping motor 22 to the base plate 12, and resonance caused by such vibration transmission is prevented. Therefore, noise caused by resonance with the vibration of the stepping motor 22 can be prevented more reliably.
[0043]
In addition, since the roller 56 of the slider mechanism 44 is pressed against the protruding portion 36a of the hitting ball 36 by the urging force of the compression spring 50, the roller 56 does not bounce and separate from the protruding portion 36a when the hitting ball 36 swings back and forth. . Therefore, the slide shaft 48 does not vibrate to generate noise, and vibration noise does not occur at the contact point between the roller 56 and the protruding portion 36a.
[0044]
As mentioned above, although embodiment of this invention was described according to the Example, this invention is not limited to such an Example, and it cannot be overemphasized that it can implement variously in the range which does not deviate from the summary of this invention.
For example, although a winding spring (twisted coil spring) is employed as the firing spring in the embodiments, other forms of springs such as a tension coil spring may be used.
[Brief description of the drawings]
FIG. 1 is a perspective view of a stepping motor side of a game ball launching apparatus according to an embodiment.
FIG. 2 is a perspective view of a motor support pin used in the game ball launcher of the embodiment.
FIG. 3 is an exploded perspective view showing a positional relationship among hit arms, arm rollers, and arm pins in the game ball launching apparatus according to the embodiment.
FIG. 4 is a cross-sectional view showing an internal structure of an arm roller.
FIG. 5 is an exploded perspective view of a slider mechanism used in the game ball launching apparatus of the embodiment.
FIG. 6 is an exploded perspective view for explaining a structure for exerting an urging force on the hitting ball of the game ball launching apparatus of the embodiment.
FIG. 7 is a partial cross-sectional view illustrating a structure of a peripheral portion of a winding spring of the game ball launching apparatus according to the embodiment.
8A and 8B are explanatory diagrams of adjustment of the basic deformation amount of the winding spring. FIG. 8A is a partial sectional view of the vicinity of the adjustment knob and the vicinity of the cam receiving lever, and FIG. 8C is a neutral view of the cam receiving lever. FIG. 8C is an explanatory diagram when the cam receiving lever is oscillated and displaced in a direction to increase the basic deformation amount of the winding spring, and FIG. It is explanatory drawing when the cam receiving lever is oscillated and displaced in the direction of decreasing the basic deformation amount.
FIG. 9 is a perspective view of the winding spring side of the game ball launching apparatus of the embodiment.
[Explanation of symbols]
10 ... Game ball launcher 12 ... Base plate
14 ... Motor support pin (buffer connecting member) 16 ... Bolt
18 ... Metal plate 20 ... Buffer shaft 22 ... Stepping motor
30 ... Driving cam 31 ... Arm pin 32 ... Hit arm
34 ... Arm roller 34a ... Roller body 34b ... Surface rubber
36 ... Hitting ball 38 ... Hitting ball spring 44 ... Slider mechanism
60 ... Receiving tube 60a ... Spacer hole 62 ... Ring spacer
64a, 64b ... Ball bearing 66 ... Spacer 68 ... Holding cylinder
72 ... Drive shaft 72a ... Base end 72b ... Tip
72c ... Flange 72d ... Through hole 74 ... Adapter
78 ... Adjusting shaft 78a ... Picking attachment part 78b ... Adjusting cam
78c ... Shaft 80 ... Spring receiver 82 ... Preload spring
84 ... Ratchet plate 86 ... Ratchet cover 88 ... Adjustment knob
94 ... Adjustment ring 96 ... Winding spring (fire spring)
100 ... Torque cap 102 ... Cam receiving lever
104 ... Safety cap 110 ... Gear shaft 112 ... Adjustment gear
116 ... Coupling 120 ... Guide rail 122 ... Rack member

Claims (2)

A driving shaft rotatably supported by a bearing held by a receiving cylinder fixed to a base plate, a striking ball connected to the driving shaft and swinging forward and backward about the driving shaft; A firing spring that increases the amount of elastic deformation in association with backward swing and biases the striking ball in the forward direction, a hit arm that is connected to the drive shaft or the striking ball and rotates together with the striking ball, and an axial direction thereof An arm pin fixed to the tip of the hit arm so as to be substantially perpendicular to the rotation surface of the hit arm, an arm roller pivotally supported by the arm pin, and a force driven on the arm roller driven by a motor. In a game ball launcher comprising: a drive cam for releasing the arm roller after swinging and displacing the hit arm on the side where the hitting basket is moved backwardly;
The arm roller is composed of a roller body and a surface rubber fitted to the outer surface thereof,
A groove is provided on the outer periphery of the roller body,
A game ball launcher characterized in that a protrusion provided on the surface rubber is engaged with the groove to prevent the surface rubber from falling off . The game ball launcher according to claim 1, wherein
The corner portion between the outer peripheral surface and the end surface of the roller body is chamfered,
The game ball launcher according to claim 1, wherein the surface rubber is provided with a convex portion having a triangular cross section corresponding to the chamfered portion .

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