JP3263449B2 - Playball launcher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a game ball launching device in a pachinko machine or other hitting ball game machines.

[0002]

2. Description of the Related Art A game ball launching device for a pachinko machine is conventionally known in which a direct acting solenoid or a rotary solenoid is used and a striking rod is reciprocated by electromagnetic force to strike and launch a game ball. I have.

[0003]

However, the above-mentioned conventional electromagnetic play ball launching apparatus controls the power supply current applied to its electromagnetic coil to adjust the striking force to control the flight distance of the play ball. Was. For this reason, if the voltage fluctuates, the flight distance will be uneven, making it impossible to hit as desired
There was a problem of becoming .

Further, since it is necessary to control a large current capable of strongly exciting the electromagnetic coil, there is a problem that the power supply control circuit needs a capacity corresponding to the current, and the required parts are expensive and the manufacturing cost is high.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a game ball launching device which solves the above-mentioned problems, and comprises a play ball hitting mandrel supported in an axially movable manner and a play ball hitting direction. A magnetic coil that attracts the mandrel by magnetic force against the tension of the spring and retreats the mandrel; and a stopper that abuts the mandrel when the mandrel retreats to limit the stroke of the mandrel. On the same axis as the mandrel
A reciprocating shaft provided, and a nut screwed to a screw shaft of the reciprocating shaft.
Rotate the nut and the nut to move the reciprocating shaft in the axial direction.
And a stepping motor for moving the
A seat member for supporting the other end of the spring is provided .

[0006]

The tension of the spring is adjusted by operating the stepping motor to move the seat member of the spring in the axial direction, so that the hitting force of the game ball can be adjusted as desired. In this case, the magnetic force of the electromagnetic coil causes the mandrel to be constantly attracted until it hits the stopper, thereby preventing the occurrence of unevenness due to voltage fluctuation.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows this play ball launching device in a longitudinal section. 1 in the figure
Is a cylindrical casing composed of a large case 1a and a small case 1b, and 2 is a partition wall provided in the large case 1a.

A collar 3 extending into the large case 1a is provided on the inner peripheral surface of the small case 1b.
It is locked to. Reference numeral 4 denotes a mandrel to which a coil spring 6 for hitting a play ball 5 such as a pachinko ball is fixed to an outwardly projecting end, and a pin-shaped iron core 7 formed of a ferromagnetic material is fixed to a substantially middle portion of the mandrel 4. When the iron core 7 slides on the inner surface of the collar 3 in the axial direction, the mandrel 4 is supported in the casing 1 so as to be able to advance and retreat.

Reference numeral 8 denotes an electromagnetic coil provided in the casing 1 so as to surround the collar 3, and reference numerals 9 and 10 denote an end plate and a peripheral plate of the electromagnetic coil 8. When energized, the electromagnetic coil 8 attracts the iron core 7 and moves the mandrel 4 backward. A stopper 11 is formed on the inner periphery of the partition wall 2 so that the end face of the iron core 7 comes into contact with the mandrel 4 when the mandrel 4 retreats and the mandrel 4 stops moving.

A rear portion 12 of the mandrel 4 is formed to have a large diameter, and one end of a coil-shaped spring 13 is inserted through the rear portion 12 and fixed.

Numeral 14 denotes a stator winding 15 fixed on the inner periphery of the bottom of the large case 1a separated by the partition 2, and the stator winding 15
A stepping motor comprising a cylindrical rotor 17 rotatably supported by roller bearings 16 therein, and an annular permanent magnet 18 fixed to the outer periphery of the rotor 17.
A nut 19 is fixed in the inside 7.

Reference numeral 20 denotes a large case 1a on the same axis as the mandrel 4.
The advancing / retreating shaft 20 is composed of a D-cut shaft portion 21 and a screw shaft portion 22, and a bowl supporting the other end of the spring 13 at its tip and compressing the spring 13. A seat member 23 is provided. The nut 19 is screwed to the screw shaft 22.

As a result, when the annular permanent magnet 18 and the rotor 17 rotate, the nut 22 rotates integrally when excited by the rotating magnetic field generated in the stator winding 15, so that the screw shaft portion 22, that is, the reciprocating shaft 20 moves in the axial direction. Then, the set position of the seat member 23 can be moved and adjusted in the axial direction.

FIG. 3 is a block diagram of a pachinko machine as an example.
A switch 27 which is turned on by rotating the rotation axis of a firing handle 26 provided on the front of the pachinko machine.
And a variable resistor 28 whose electric resistance continuously changes according to the rotation angle. When the switch 27 is turned on, a pulse current of about 100 times per minute flows from the power supply 29 to the electromagnetic coil 8. At the same time, the servo power supply 30 receives a signal from the variable resistor 28 and follows the rotation angle of the firing handle 26 to rotate the stepping motor 14.

For this reason, when the player rotates the firing handle 26, the rotor 17 and the nut 19 are rotated according to the rotation angle.
Is rotated, the reciprocating shaft 20 screwed to the nut 19 is moved in the axial direction and stopped at a predetermined position, and when the electromagnetic coil 8 is excited, the iron core 7 is attracted by the magnetic force and the mandrel 4 is spring-loaded. 13 is retracted against the elasticity of No. 13. Then, when the rear end of the mandrel 4 hits the stopper 11, retraction is limited thereafter. When the excitation of the electromagnetic coil 8 is released in this state, the mandrel 4 rushes forward due to the elasticity of the spring 13, and the coil spring 6 strikes the game ball 5 and fires the game ball 5 on the rail of the pachinko machine.

The striking force at this time depends on the amount of compression of the spring 13, that is, the set position of the seat member 23. Thus, the player can freely control the flight distance of the play ball 5, and there is no possibility that the flight distance of the play ball 5 will change unnecessarily even if the voltage applied to the electromagnetic coil 8 fluctuates.

[0017]

As described above, according to the play ball launching apparatus of the present invention, there is a beneficial effect that the hitting force of the play ball can be adjusted as desired without being affected by the voltage fluctuation.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a game ball launching apparatus according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a block diagram of a game ball launching apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 4 Mandrel 5 Play ball 7 Iron core 8 Electromagnetic coil 11 Stopper 13 Spring 14 Stepping motor 17 Rotor 19 Nut 20 Reciprocating shaft 22 Screw shaft portion 23 Seat member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A63F 7/02

Claims (1)

(57) [Claims] 1. A game ball hitting mandrel that is supported so as to be able to advance and retreat in the axial direction, a spring that urges the mandrel in the game ball hitting direction, and attracts the mandrel by magnetic force against the tension of the spring. An electromagnetic coil that moves back and forth, a stopper that abuts the mandrel when the mandrel is retracted to limit the stroke of the mandrel, an advancing and retreating shaft provided on the same axis as the mandrel,
A nut screwed onto the screw shaft of the reciprocating shaft, and the nut is rotated
Stepping mode to move the reciprocating axis in the axial direction.
And the other end of the spring is supported by the reciprocating shaft.
A game ball launching device characterized in that a seat member is provided .