JP2707429B2 - Electric hitting machine for pachinko machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric ball hitting device for a pachinko machine, and more particularly to a structure of a ball hitting device configured to apply a rotating force to a ball hitting arm based on an electromagnetic force.

[0002]

2. Description of the Related Art Conventionally, an electric ball hitting device of a pachinko machine includes a device that intermittently drives a ball hitting arm connected to a cam follower via a cam to the output of a motor, and a device that directly drives a ball hitting arm by a rotary solenoid. There is a type that pulls and rotates a ball striking arm by a suction force of a plunger solenoid. In these electric ball hitting devices, there is a problem that energy loss and wear occur in the cam mechanism when driving the ball hitting arm with a cam mechanism interposed in the drive source. When a rotary solenoid or a plunger solenoid is used, the driving force in the initial rotation stroke of the ball striking arm is weak,
There is a problem that the rotation speed of the hitting arm is not stable and the flight distance and direction of the hitting ball are not determined.

In order to solve these problems, Japanese Patent Application Laid-Open No. 5-76650 discloses a permanent magnet which is rotatably mounted integrally with a firing rod, and an electromagnet opposed to the permanent magnet. An electric ball hitting device configured such that the magnetic pole of the permanent magnet and the magnetic pole of the electromagnet are wired to be the same magnetic pole, and the firing rod is rotated by the repulsive force of the permanent magnet and the electromagnet generated when power is supplied to the electromagnet. Have been described. According to this device, there is no problem of energy loss and wear, and furthermore, the repulsive force of the permanent magnet and the electromagnet is used to increase the torque at the beginning of the rotation stroke of the firing rod, so that the flight distance and direction of the hit ball are reduced. It is stated to be stable.

[0004]

However, in the conventional electric ball hitting device described in Japanese Patent Application Laid-Open No. 5-76650, the construction of the magnetic circuit is incomplete for both the permanent magnet and the electromagnet, and the efficiency is poor. There is a problem that a large permanent magnet and an electromagnet are required to fire a strong hit ball. Further, in this device, since only the repulsive force between the pair of magnetic poles is used, the rotation torque at the beginning of the stroke is large, but the initial position and the final position of the stroke are difficult to stabilize, and the rotation speed is not uniform. It is large, and the flight distance and direction of the hit ball may be unstable.

Accordingly, the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to use a magnetic repulsive force efficiently from the initial stage of rotation to the completion of the rotation, thereby making it possible to reduce the size of the device and achieve a stable operation. It is an object of the present invention to realize a new electric hitting device capable of obtaining a hitting ball having a flight distance and a direction.

[0006]

Means taken to solve the above problems include a rotor supported by a rotating shaft, a stator facing the rotor, and a pachinko ball hit by the rotor. And an electric ball hitting device for a pachinko machine that rotates the hitting arm by rotating the rotor based on an electromagnetic force between the rotor and the stator. A plurality of magnetic poles of the same polarity are respectively formed on opposing portions of the rotor and the stator, and an interval between the plurality of magnetic poles is set to be slightly larger than twice a rotation stroke of the hitting arm. And one of the stators is provided with an electromagnetic coil that excites the magnetic pole to the same polarity as the other magnetic pole, and sets the magnetic neutral point of the rotor in the excited state to the rotation of the rotor. The direction is characterized in that an auxiliary magnetic core configured to shift a predetermined amount in the opposite side.

Here, it is desirable that the auxiliary magnetic core is formed with a magnetic center of gravity shifted from the neutral point of the magnetic force to a side opposite to a rotation direction of the rotor.

Preferably, the auxiliary core has a polarity opposite to that of the magnetic pole formed on the rotor or the stator.

Further, the auxiliary magnetic core is provided with a tip end extending in the radial direction of the rotor or the stator and facing the magnetic pole of the stator or the rotor. It is preferable to provide a protrusion facing the opposite side to the direction.

[0010]

According to the first aspect, the interval between the plurality of magnetic poles formed on the rotor and the stator is formed to be slightly larger than twice the rotation stroke of the hitting arm, and one magnetic pole of the rotor and the stator is set to be the other magnetic pole. By providing an electromagnetic coil that excites to the same polarity and providing an auxiliary magnetic core formed so that the magnetic neutral point of the rotor in this excited state is shifted by a predetermined amount to the side opposite to the rotation direction of the rotor, excitation of the electromagnetic coil can be performed. Even when there is no magnetic pole, the initial position of the rotor is shifted in a predetermined rotation direction due to the presence of the auxiliary magnetic pole. Start rotating smoothly in the direction of rotation. After this, the rotor rotates to the magnetic neutral point,
At this time, the neutral point of the magnetic force is shifted in the anti-rotation direction by the auxiliary magnetic core. Therefore, when the excitation of the electromagnetic coil is stopped, the rotor smoothly returns in the anti-rotation direction. Therefore, the initial position and the final position of the rotor are not easily changed, and the rotational speed of the rotor is also stabilized, so that variations in the flight distance and direction of the hit ball are reduced.

According to the second aspect, by forming the magnetic center of gravity of the auxiliary magnetic core so as to be shifted in the counter-rotating direction, the magnetic neutral point can be shifted by a simple method.

According to the third aspect, the auxiliary magnetic core is configured to have a polarity opposite to that of the magnetic poles of the rotor and the stator, so that the rotation of the rotor to the magnetic neutral point is accelerated and the rotation of the rotor is rotated. Since the speed is stabilized and the stability of the rotor at the neutral point of the magnetic force is also increased, the variation in the flight distance and direction of the hit ball can be further reduced.

According to a fourth aspect of the present invention, as the shape of the auxiliary magnetic pole, a tip end portion extending in the radial direction and facing the magnetic pole of the stator or the rotor is provided, and the tip end portion projects in a direction opposite to the rotation direction of the rotor. By providing the protrusion, the protrusion is provided at the tip end facing the magnetic pole, so that a slight deviation of the magnetic neutral point can be obtained by a slight protrusion of the protrusion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an electric hitting device for a pachinko machine according to the present invention will be described. As shown in FIGS. 1 and 3, the drive mechanism of this embodiment includes a stator 2 fixed to a disk-shaped support plate 1 attached to a substrate of a ball hitting mechanism, and a shaft rotatable with respect to the stator 2. And the outer rotor 3 supported.

The stator 2 has a ring portion 20 fixed to the outer periphery of the shaft tube portion 10 provided on the support plate 1, and three windings projecting from the ring portion 20 at equal angular intervals in the radial direction thereof. Shafts 21, 22, 23 and electromagnetic coils 24, 25, 26 wound around the respective winding shafts are provided. The magnetic pole portions 21a, 22a, 2
3a is provided. Auxiliary magnetic cores 27, 28, 29 protruding outward from an intermediate point between adjacent winding shaft portions in the ring portion 20 are integrally formed. Are formed with hook-like portions 27a, 28a, 29a projecting counterclockwise.

The outer rotor 3 has a shaft core 30 formed in a shaft shape, and a bearing portion 32 which is rotatably mounted on the outside of the shaft core 30 via a bearing and which is fitted inside the shaft tube portion 10. And a carriage 35 connected to the shaft core 30, and permanent magnets 36A, 36B, 3 attached to the carriage 35.
6C is provided. The carriage 35 has an axis 3
0, three supporting legs 35B formed at equal angular intervals so as to extend outward from the core frame 35A, and a ring-shaped outer frame connected to the supporting legs 35B. 35C. The outer frame portion 35C has a mounting portion 35 formed to swell slightly outward at equal angular intervals.
a, 35b, and 35c are provided, and permanent magnets 36A, 36B, and 36C are adhesively fixed to the insides thereof.
Note that the carriage 35 may be formed in a cup shape without providing the support legs as described above.

FIG. 2 shows this embodiment as viewed from the front and back with respect to FIG. The support plate 1 is fixed to the substrate 40 by three screw holes 11. A pachinko ball 42 is provided on the shaft core 30.
A hitting arm 41 having a resilient portion 41a for hitting the ball at its tip is mounted and fixed. The substrate 40 is provided with an initial position stopper 43 and a final position stopper 44 made of elastic rubber or the like for regulating the rotation range of the ball striking arm 41. The pachinko ball 42 supplied from a ball supply device (not shown) is supplied to a hitting position along a guide member 45 and hit by a resilient portion 41 a of a hitting arm 41, and then, along with a guide rail 46, a pachinko board surface. It is driven in.

The permanent magnets 36A, 36B, 36C are:
As shown in FIG. 1, magnetic poles of the same polarity (for example, N-pole) inside
And the magnetic pole portions 21 opposed to these are fixed.
a, 22a and 23a are permanent magnets 36A, 36B and 36
The direction of the current flowing through the electromagnetic coils 24, 25, and 26 is set in advance so that a magnetic pole having the same polarity as the magnetic pole inside C (that is, the N pole) is generated. FIG. 4 shows the stator 2 and the outer rotor 3 of the above embodiment when the hitting arm 41 is removed.
(A) shows the schematic structure of the electromagnetic coil 2.
Outer rotor 3 when no current flows through 4, 25, 26
(B) shows the electromagnetic coils 24, 25, 2
6 shows a stop position of the outer rotor 3 when a current is supplied to the outer rotor 6.

When no current flows through the electromagnetic coils 24, 25 and 26, no magnetic poles are generated in the magnetic pole portions 21a, 22a and 23a, but the permanent magnets 36A, 36B and 36C are made of the largest magnetic material. The magnetic pole parts 21a, 22a,
23a. Here, the magnetic pole portions 21a, 22
a, 23a, auxiliary magnetic cores 27, 28, 2
Since the hooks 27a, 28a, and 29a are formed on each of the magnets 9, the balance as the magnetic material is shifted in the counterclockwise direction, and as shown in FIG.
The center positions of 6A, 36B, and 36C are the magnetic pole portions 21a, 22.
a and 23a are shifted by an angle θ.

In this state, the electromagnetic coils 24, 25, 26
When current flows through the magnetic poles, the same magnetic poles as the permanent magnets 36A, 36B, and 36C are generated in the magnetic pole portions 21a, 22a, and 23a.
The outer rotor 3 rotates clockwise due to the magnetic repulsion. Here, since the initial positions of the permanent magnets 36A, 36B, 36C are shifted clockwise from the magnetic pole portions 21a, 21b, 21c, the permanent magnets can be reliably rotated clockwise.

The outer rotor 3 includes permanent magnets 36A, 36
B and 36C rotate until approaching the midpoint between the magnetic pole portion that was initially opposed and the adjacent magnetic pole portion. Permanent magnet 36A, 3
When 6B and 36C approach the intermediate point, the rotation speed of the outer rotor 3 gradually decreases due to the magnetic force from the adjacent magnetic pole portion, and stops near the intermediate point. At this time, the stop position of the outer rotor 3 is, as shown in FIG.
The position is located on the front side by the angle φ from the position of the intermediate point where 7, 28 and 29 are formed. This is because the auxiliary cores 27 and 2
Permanent magnets 36A, 36B, 36C at the tip of 8, 29
A magnetic pole having a polarity opposite to that of the inner magnetic pole is generated, and the hooks 27a, 28a, and 29a are formed at the ends thereof, so that the balance of the magnetic force is slightly deviated in the counterclockwise direction. is there.

In this way, the outer rotor 3 is slightly deviated in the counterclockwise direction from the intermediate point between the magnetic pole parts from the initial position slightly deviated in the clockwise direction from the magnetic pole parts by energizing the electromagnetic coils 24, 25, 26. Rotate to final position. Actually, since the outer rotor 3 rotates at high speed, the permanent magnet 3
The positions of 6A, 36B, and 36C overrun the intermediate positions of the magnetic pole portions, but immediately return in the counterclockwise direction due to the repulsive force of the adjacent magnetic pole portions, and again receive the repulsive force from the original magnetic pole portions, and alternately receive the repulsive force. Vibrates for a while by repeating. However, even in this vibration state, the amplitude quickly converges, so that the center position of the permanent magnets 36A, 36B, 36C immediately falls within the counterclockwise range from the intermediate position between the magnetic poles.

Thus, at the final position shown in FIG. 4B, the positions of the permanent magnets 36A, 36B, 36C are more counterclockwise than the intermediate positions between the magnetic pole portions 27a, 28a, 29a. Therefore, when the energization of the electromagnetic coils 24, 25, and 26 is cut off, the electromagnetic coils surely rotate in the counterclockwise direction, and
Return to the initial position shown in.

In actuality, as shown in FIG. 2, a ball striking arm 41 is connected to the axis 30 of the outer rotor 3, and the ball striking arm 41 has an initial position stopper 43 and a final position stopper 44.
The rotation range is limited by the
It does not rotate outside between the initial position shown in FIG. 4A and the final position shown in FIG. In the above embodiment, the angle between the magnetic pole portions is 120 degrees, and the angle between the magnetic pole portions and the intermediate position is 60 degrees. However, the maximum value that can be used as the rotation angle of the ball striking arm 41 is (60−θ−φ). ) Degree. Angle θ =
When φ = about 5 to 15 degrees, the maximum value of the rotation angle of the ball striking arm 41 is 30 to 50 degrees, and preferably θ = φ =
It is about 10 degrees, and the maximum value is about 40 degrees. It is also possible to set the rotation angle smaller than the maximum value.

In this embodiment, the initial position of the ball striking arm 41 and the final position thereof near the final position (neutral point of magnetic force) when the power is not supplied to the electromagnetic coil and the final position when the power is supplied to the electromagnetic coil, respectively. Since the position is set, the attractive force of the auxiliary magnetic core and the repulsive force of the adjacent magnetic pole portion greatly affect the final rotation speed. In particular, in the case of the present embodiment, the holding potential at the neutral point of the magnetic force of the outer rotor 3 is high due to the auxiliary magnetic core that is excited with the polarity opposite to that of the magnetic pole portion. Therefore, even if the position of the hitting arm 41 before energization is slightly shifted due to the vibration of the hitting arm 41, the rotation speed of the hitting arm 41 does not change much, and the flight distance and direction of the hitting ball 41 are small.

The rotation angle of the ball striking arm 41 varies depending on the design of the pachinko machine, but in this embodiment, the neutral point of the magnetic force can be changed depending on the shape and the position of the auxiliary magnetic cores 27, 28, 29. , Can easily cope with the turning angle of the hitting arm 41. Further, since the displacement of the magnetic pole position between the permanent magnet and the magnetic pole portion of the electromagnet can be set in advance by forming the auxiliary magnetic core, the displacement of the permanent magnet and the electromagnet can be adjusted as in the related art. This is unnecessary, and a mechanism for forcibly holding the displacement amount is not required.

In this embodiment, since the hitting arm is driven to rotate by the outer rotor, the inertia can be easily increased, and the hitting force of the pachinko ball can be increased. Further, since the rotor can be arranged on the outer peripheral side, assembly and adjustment become easy, which is preferable from the viewpoint of cost and quality maintenance in the manufacturing process.

When the electromagnet is excited, the outer rotor 3 is moved from the initial position to the magnetic neutral point which is shifted from the intermediate position.
Rotates, but when the electromagnet is demagnetized, the magnetic neutral point deviated from the intermediate position induces a return operation to the original magnetic pole, so that the return operation can be more quickly and reliably performed. Therefore, it is not necessary to supply a current in the opposite direction to the electromagnetic coil for returning the hitting arm. In particular, when the hit ball must be sent out frequently, the reliability of such a return operation is important to enhance the stability of the hit ball and the reliability of the throw.

In the above embodiment, the drive system including the stator 2 and the outer rotor 3 formed inside is provided.
The structure is not particularly limited, and the inner rotor may be of an inner rotor type that can be more easily miniaturized, though the inertia of the rotor is reduced. If the above condition is satisfied, the number of magnetic poles is not limited to three, but may be another number. However, since the rotation angle of the hitting arm is generally about 39 to 45 degrees,
Three or four poles are most preferred.

The shape of the auxiliary magnetic core is arbitrary, and it is also possible to attach the auxiliary magnetic core to the rotor side to have a similar function. As a method of shifting the magnetic force neutral point by the auxiliary magnetic core, in addition to the method of providing a protrusion extending in the anti-rotation direction at the tip of the auxiliary magnetic core as in the above embodiment, And a method of inclining the stretching direction of the auxiliary magnetic core.

[0031]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect, the interval between the plurality of magnetic poles formed on the rotor and the stator is formed to be slightly larger than twice the rotation stroke of the hitting arm, and one magnetic pole of the rotor and the stator is set to be the other magnetic pole. By providing an electromagnetic coil that excites to the same polarity and providing an auxiliary magnetic core formed so that the magnetic neutral point of the rotor in this excited state is shifted by a predetermined amount to the side opposite to the rotation direction of the rotor, excitation of the electromagnetic coil can be performed. Even when there is no magnetic pole, the initial position of the rotor is shifted in a predetermined rotation direction due to the presence of the auxiliary magnetic pole. Start rotating smoothly in the direction of rotation. After this, the rotor rotates to the magnetic neutral point, but at this time, the magnetic neutral point is shifted in the anti-rotation direction by the auxiliary core, so when the excitation of the electromagnetic coil is stopped, the rotor returns to the anti-rotation direction smoothly. I do. Therefore, the initial position and the final position of the rotor are not easily changed, and the rotational speed of the rotor is also stabilized, so that variations in the flight distance and direction of the hit ball are reduced.

According to the second aspect, by forming the magnetic center of gravity of the auxiliary magnetic core so as to be shifted in the anti-rotation direction, the magnetic neutral point can be shifted by a simple method.

According to the third aspect, the auxiliary magnetic core is configured to have a polarity opposite to that of the magnetic poles of the rotor and the stator, so that the rotation of the rotor to the magnetic neutral point is accelerated and the rotation of the rotor is rotated. Since the speed is stabilized and the stability of the rotor at the neutral point of the magnetic force is also increased, the variation in the flight distance and direction of the hit ball can be further reduced.

According to the fourth aspect of the present invention, the auxiliary magnetic pole has a shape extending in the radial direction, and having a tip end facing the magnetic pole of the stator or the rotor. By providing the protrusion, the protrusion is provided at the tip end facing the magnetic pole, so that a slight deviation of the magnetic neutral point can be obtained by a slight protrusion of the protrusion.

[Brief description of the drawings]

FIG. 1 is a main part rear view showing a structure of a driving part in an embodiment of an electric ball hitting apparatus for a pachinko machine according to the present invention.

FIG. 2 is a front view showing the entire configuration of the embodiment.

FIG. 3 is a longitudinal sectional view showing the entire configuration of the embodiment.

FIG. 4 is a rear view of a main part showing a state of the main part of the embodiment, in which (a) shows an initial position in the case where power is not supplied, and (b) shows a final position in which the outer rotor is rotated by supplying power. It is shown.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 support plate 2 stator 3 outer rotor 21, 22, 23 winding frame part 21 a, 22 a, 23 a magnetic pole part 24, 25, 26 electromagnetic coil 27, 28, 29 auxiliary magnetic core 36 A, 36 B, 36 C permanent magnet

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-164079 (JP, A) JP-A-63-164978 (JP, A) JP-A-59-181181 (JP, A) 51587 (JP, U) Actually open sho 59-164678 (JP, U)

Claims (4)

(57) [Claims] A rotor that is rotatably supported by a rotating shaft, a stator that faces the rotor, and a ball striking arm that is connected to the rotor and configured to strike a pachinko ball;
An electric ball hitting device of a pachinko machine that rotates the hitting arm by rotating the rotor based on an electromagnetic force between the rotor and the stator, wherein opposing portions of the rotor and the stator are respectively provided. A corresponding plurality of magnetic poles of the same polarity are formed, the interval between the plurality of magnetic poles is set to be slightly larger than twice the rotation stroke of the hitting arm, and one of the rotor and the stator is provided with the other magnetic pole. And an auxiliary magnetic core configured to shift a neutral point of magnetic force of the rotor in the excited state by a predetermined amount in a direction opposite to a rotation direction of the rotor. The electric ball hitting device of the pachinko machine. 2. The pachinko machine according to claim 1, wherein the auxiliary magnetic core is formed with a magnetic center of gravity shifted from a neutral point of the magnetic force to a side opposite to a rotation direction of the rotor. Electric hitting device. 3. The electric motor for a pachinko machine according to claim 1, wherein the auxiliary magnetic core is configured to have a polarity opposite to that of the magnetic pole formed on the rotor or the stator. Type ball hitting device. 4. The rotor according to claim 1, wherein the auxiliary magnetic core has a tip portion extending in a radial direction of the rotor or the stator and facing a magnetic pole of the stator or the rotor. An electric ball hitting device for a pachinko machine, characterized in that it has a protruding portion facing in the direction opposite to the rotation direction.