JPS584531Y2 - Ball launcher in pachinko machines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ball firing device for a pachinko machine that changes the number of balls fired within a unit time, and is particularly intended to equalize the elastic force of the firing rod.

FIG. 1 is a simplified configuration diagram of a batted ball launcher recently proposed by the applicant. In the figure, an electric motor 2 is positioned on a support plate 1, and the rotational force of this electric motor 2 is reduced by a speed reducer 3. and is transmitted to a rotating shaft 5 having a cam 4.

The cam 4 is rotatable around a fulcrum 6 and is supported by an elastic member 7.
It slides on the roller 9 of the firing rod 8 which is pulled in the firing direction by the arrow.

That is, when the cam 4 rotates in a certain direction, the roller 9 comes into contact with the cam 4 for a certain period and is pressed, and the firing rod 8 is pressed against the elastic member 7.
When the roller 9 moves away from the cam 4, the firing rod 8 instantly recovers and fires the ball.

The elastic member 7 is connected to an adjustment plate 10, which is hung on a pulley 11 and connected to a wire 14 wound around a pulley 13 of a dial 12.

Therefore, by adjusting the dial 12, the elastic force of the elastic member 7 can be adjusted, and the firing force of the firing rod 8 can be adjusted.

The electric motor 2 has a cam piece 1 provided at the end of the shaft of the dial 12.
The rotation speed is regulated by the output frequency of the frequency converter 17.

For example, when a small single-phase induction motor or the like is used as the electric motor 2, the rotation speed can be adjusted by changing the human power frequency.

The frequency conversion device 17 is composed of an oscillation circuit made of, for example, an IC circuit, and a variable resistor 18 that determines the magnitude of the oscillation frequency is located at the front of the pachinko machine.

A scale 19 is added to this variable resistor 18, and an indicator 2
By operating 0, the oscillation frequency corresponding to the indicated value on this scale 19 can be obtained.

Therefore, according to this configuration, the rotational speed of the electric motor 2 can be changed simply by changing the instruction value of the instruction section 20, and the firing rod 8 can be changed.
You can adjust the number of bullets.

For example, if the indicated value is set to a scale of 50, 5
It can fire the ball 0 times, and if it is set to the 100 scale, it can fire the ball 100 times per minute.

Moreover, this operation can be performed without changing the torque of the electric motor 2.

On the other hand, as shown in FIG. 2, the cam 4 protrudes in the radial direction from the rotating shaft 5, and has two protruding pieces 22 that are smoothly inclined so that the tip portion 21 is approximately equal to the curvature of a circle centered on the rotating shaft. Be more careful.

Now, when the cam 8 rotates in the direction of the arrow 23, the roller 9 slides from the side 24 of the protruding piece 22 toward the tip 21 and is finally released from the tip 21, and the firing rod 8 is instantly restored.
Hit the ball.

However, according to the above configuration, when the rotational speed of the cam 4 differs due to a change in the rotational speed of the electric motor 2, the position at which the roller 9 is released from the protruding piece tip 21 differs.

For example, if cam 4 rotates 100 times per minute, roller 9
is released at the position indicated by the dotted line in the figure, but the cam 4 is released at a rate of 5 per minute.
When rotating 0 times and at low speed, the roller 9 slides to the most extreme position of the tip portion 21 and is then released at the position shown by the solid line in the figure.

As described above, since the release position of the roller 9 differs by the amount a, a difference occurs in the elastic force of the firing rod 8 between low-speed rotation and high-speed rotation.

Therefore, the present invention is intended to eliminate the above-mentioned drawbacks, and will be described in detail below using examples.

FIG. 3 is a simplified configuration diagram showing an embodiment of a ball launcher for a pachinko machine according to the present invention, and the same parts as in FIGS. 1 and 2 are denoted by the same reference numerals.

In the figure, the protruding piece 22 of the cam 4 is curved in a direction opposite to the rotating direction, and a boss 4 is provided on the side of the center.
0, and the small diameter portion 41 at the end of the rotating shaft 5 passes through the center of the cam 4 and the hollow portion of the boss 40, and is rotatable.

A substantially rectangular convex portion 42 is formed on the end surface of the rotating shaft 5,
This convex portion 42 projects into a rectangular hole 45 of the actuating plate 43.

Actuation plate 43. is the tapped hole 47 of the rotating shaft 5 via the washer 46.
It is fixed with a screw 48 that is screwed into the.

The outer shape of the actuating plate 43 is almost the same as the outer shape of the boss 40, and a stopper 49 extending in the outer circumferential direction of the boss 40 is located on a part of its outer circumference. can touch the side wall of the

According to the above configuration, the cam 4 is rotatable with respect to the rotating shaft 5 in the outer peripheral section of the boss 40 where the protrusion 50 is not formed.

That is, when the rotating shaft 5 rotates in the direction of arrow l, the stopper 49 comes into contact with the protrusion 50, so the cam 4 rotates in the same direction.

Therefore, when the rotating shaft 5 rotates forward and the stopper 49 engages with the protrusion 50 and the cam 4 rotates, the roller 9 moves from the side 24 of the protrusion piece 22 of the cam 4 toward the tip 21.

When the rollers 9 reach the tip 21, a force is applied by the rollers 9 to rotate the cam 4 in the direction of rotation of the rotating shaft 5 (in the direction of arrow l), which causes the boss 40 and the cam 4 to rotate.
can rapidly rotate before the circular movement of the stopper 49.

For example, if cam 4 rotates at a high speed of about 100 revolutions per minute,
The roller 9 moves along the side 24 of the cam 4 and the tip 21
When it reaches , Koro 9 arrows cam 4! A force is generated that tries to rotate it in the direction.

However, this force is instantly consumed by rapidly rotating the cam 4 before the stopper 49 moves.

Therefore, the roller 9 is released immediately after reaching the most extreme end of the cam tip 21.

Further, when the cam 4 rotates at a low speed of about 50 revolutions per minute, when the roller 9 reaches the cam tip 21, a force is generated by the roller 9 to rotate the cam 4 in the direction of the arrow.

However, this force causes the cam 4 to move against the stopper 4 as before.
By rotating it before moving 9, it will be consumed instantly.

Therefore, the roller 9 is released immediately after reaching the most extreme end of the cam tip 21.

The force with which the roller 9 tries to rotate the cam 4 changes depending on the rotational speed of the cam 4, but regardless of its strength, by rotating the cam 4 before the movement of the stopper 49, It will all be consumed and gone.

Therefore, even if the cam 4 rotates at a high speed or a low speed, the release positions of the rollers 9 can be almost matched, and therefore the elastic force of the firing rod 8 can be made uniform.

As explained above, according to the present invention, in a firing device configured such that the cam rotates following the rotation of the rotating shaft in a fixed direction and swings the firing rod, the cam can be freely rotated with respect to the rotating shaft. Therefore, the firing rod can always be tilted at a certain angle and then released, which has the effect of making it possible to set the firing force uniformly.

[Brief explanation of the drawing]

FIG. 1 is a simplified configuration diagram showing an example of a ball launcher for a pachinko machine proposed by the present applicant, FIG. 2 is a diagram showing the main parts of the device, and FIG. 3 is a diagram of the ball launcher for a pachinko machine according to the present invention. FIG. 2 is a perspective view of essential parts showing one embodiment. 4...Cam, 5...Rotating shaft, 40...
... Boss, 43 ... Actuation plate, 46 ...
...Washer, Tsukuda...Screw, 49...Stopper 50...Protrusion.

Claims (1)

[Scope of utility model registration request] In a ball launcher in which the cam rotates in the forward direction following the rotation of the variable speed rotating shaft in a fixed direction and presses the firing rod to fire the ball, the cam can freely rotate relative to the variable speed rotating shaft. A ball firing device for a pachinko machine, characterized in that a boss provided on a cam and an actuation plate fixed to a speed change rotation shaft are engaged when the speed change rotation shaft rotates in the forward direction.