JPH0622381Y2 - Game ball launching device for pachinko machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a game ball launching device for a pachinko machine with an improved connection structure between a cam member and a drive shaft for driving the cam member.

(Prior Art) A general structure of a conventional game ball launching device for a pachinko machine is:
As shown in FIG. 5, a ball striking mallet 1 is swingably mounted via a pivot shaft 2, and a roller 4 is rotatably mounted on a shaft 3 projecting from the side surface of the ball striking mallet 1 to provide a contactor. I am trying. Then, a cam member 5 is rotatably provided near the roller 4,
By the rotational movement of the cam member 5 in the direction of arrow C, the cam surface 5a is brought into contact with the roller 4 to pull down the hammer 1 against the spring (not shown) in the direction of arrow A, and the tip of the cam surface 5a is rolled. At the moment of deviating from 4, the hitting mallet 1 swings vigorously in the direction of arrow B by the tensile force of the spring to hit the game ball.

(Problems to be Solved by the Invention) In the above configuration, at the moment when the tip of the cam surface 5a of the cam member 5 comes off the roller 4, the hitting mallet 1 swings vigorously in the direction of the arrow B by the tensile force of the spring (hereinafter, Since this swinging motion is referred to as a "striking motion", the roller 4 of the hammer 1 comes into contact with the back surface 5b of the cam member 5 at the beginning of the striking motion,
The hitting action of the hitting mallet 1 may be interfered by the back surface portion 5b of the cam member 5, and due to this effect, the hitting speed of the hitting mallet 1 (the launching speed of the game ball) varies, and the hitting of the game ball occurs. There was a problem that the distance was not stable.

The present invention is intended to solve such problems,
Therefore, an object of the present invention is to provide a game ball launching device for a pachinko machine, which can prevent the cam member from adversely affecting the hitting action of the hitting mallet and stabilize the hitting action.

[Structure of the Invention] (Means for Solving the Problem) A game ball launching device according to the present invention has a ball hammer which has a cam member which is rotationally driven by a drive shaft, and a contact which projects into a rotation region of the cam member. And a spring for urging the ball hammer toward the firing position, and by rotating the cam member, the contact is pushed against the spring in the direction opposite to the firing position so that the tip of the cam member is A structure in which the ball hammer is swung in the direction of the firing position by the spring when the cam member is disengaged from the contactor, and the cam member is reciprocally rotatable by a required angle θ with respect to the drive shaft. In addition, the required angle θ is characterized in that it is set to be about the radius of the contactor or slightly larger than the radius of the contact in terms of the turning distance of the tip of the cam member.

(Operation) By rotating the cam member to push the contact of the hammer into the direction opposite to the firing position by a predetermined stroke, the tip of the cam member is disengaged from the contact, and the hammer is moved toward the firing position by the spring. Swing vigorously and hit the game ball. In such a striking operation, while the contact member is being pressed by the cam member, a load is applied from the contact member to the cam member in the counter-rotational direction, so that the rotational direction is changed at the moment when the tip of the cam member comes off the contactor. The load of is released, and as a reaction to it, the elasticity of the rotation system (cam member and drive shaft) releases the constraint of the drive shaft, and the cam member instantaneously rotates in the advance direction by the required angle θ in the rotation direction, Run away from the contact. This is because the cam member is connected to the drive shaft so as to be reciprocally rotatable by the required angle θ.

At this time, the required angle θ is converted into the rotation distance of the tip of the cam member, and is set so as to be about the radius of the contactor or slightly larger than that, so that the tip of the cam member is disengaged from the contactor. It is possible to reliably prevent the interference between the two immediately after.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Reference numeral 11 denotes a launch rail for guiding the launch ball upward, and a launch position 12 is bent and formed at the lower end thereof. Thirteen
Is a batting mallet that launches the game ball supplied to the launch position 12, and is rotatable about the pivot shaft 14 in the directions of arrows A and B, and in the direction of arrow B by a spring (not shown). Being energized. A shaft portion 15 is provided at a predetermined position on the side surface of the hitting mallet 13 so as to be parallel to the pivot shaft 14, and a roller 16 as a contactor is rotatably mounted on the shaft portion 15. There is. Reference numeral 17 denotes a cam member which is rotationally driven by a drive shaft 18, which makes the drive shaft 18 parallel to the roller 16 and causes the rotational locus of the cam member 17 and the moving locus of the roller 16 to overlap each other. This cam member 17 has a symmetrically projecting portion 17 at a position opposite to 180 ° in order to swing the hammer 13 twice per revolution.
a is formed. The protruding portion 17a has a side surface portion (back surface portion 17b) in a direction opposite to the rotation direction (arrow C direction).
Is formed in a straight line passing through the center of the drive shaft 18. Further, the roller 16 of the tip side portion of the protruding portion 17a is
An arcuate cam surface 19 projecting in the rotation direction (direction of arrow C) is formed in a portion overlapping with the movement locus of, that is, a portion indicated by D in FIG. In this embodiment, the arcuate cam surface 1
The diameter of 9 is set to be the same as the protrusion dimension D of the portion that overlaps the movement locus of the roller 16.

The connecting structure of the drive shaft 18 and the cam member 17 has the following features. That is, the rotation restricting concave portion 21 is formed at one side edge portion of the shaft fitting hole 20 at the center of the cam member 17, and correspondingly, the convex portion 22 is formed on the outer peripheral portion of the drive shaft 18.
Are formed. The drive shaft 18 is connected to the cam member 17
Is rotatably fitted in the shaft fitting hole 20 of the drive shaft 18
The cam member 17 is fixed to the drive shaft 18 with the convex portion 22 positioned inside the rotation regulating concave portion 21. In this connected state, a gap having a predetermined angle θ is formed between the convex portion 22 and the side edge of the rotation restricting concave portion 21.
The cam member 17 is reciprocally rotatable with respect to the drive shaft 18 by a required angle θ. In this case, the angle θ is determined by the cam member 1
When converted to the turning distance of the tip of No. 7, the radius is set to be about the radius of the roller 16 or slightly larger.

Next, the operation of the above configuration will be described. When the cam member 17 rotates in the direction of arrow C by the rotation of the drive shaft 18, each time the arcuate cam surface 19 contacts the roller 16, the roller 16 is pressed by the arcuate cam surface 19 as shown in FIG. As a result, the hitting mallet 13 is pushed down in the direction of the arrow A, the tip of the arcuate cam surface 19 is disengaged from the roller 16, and at the same time, the hitting mallet 13 is moved by the spring (not shown) to the arrow B.
The motion of swinging vigorously in the direction and hitting the game ball at the firing position 12 is repeated twice per one rotation of the cam member 17.

In such a striking operation, while the roller 16 is being pressed by the cam member 17, a load is applied from the roller 16 to the cam member 17 in the counter-rotational direction (the direction opposite to the arrow C), so the tip of the cam member 17 is The load in the counter-rotational direction is released at the moment when is released from the roller 16, and the cam member 17 is released from the constraint of the drive shaft 18 by the elasticity of the rotation system (cam member 17 and drive shaft 18) as a reaction to the rotation direction ( In the direction of arrow C), the roller 16 is instantaneously rotated in the advance angle by the required angle θ (instantaneously rotated from the position shown by the chain double-dashed line G in FIG. 1 to the position shown by the chain double-dashed line H). Run away from. This is because the cam member 17 is connected to the drive shaft 18 so as to be reciprocally rotatable by the required angle θ. Therefore, in the present embodiment, even if the hammer 13 swings vigorously in the direction of arrow B at the moment when the tip of the cam member 17 comes off the roller 16,
It is possible to reliably prevent the roller 16 of the hitting mallet 13 from coming into contact with the back surface portion 17b of the cam member 17 due to the instantaneous escape of the cam member 17 in the rotating direction, so that the hitting operation can be stabilized and the game ball The flight distance can be stabilized.

As described above, even when the cam member 17 is connected to the drive shaft 18 so as to be reciprocally rotatable by the required angle θ, the convex portion 22 of the drive shaft 18 is always rotated while the cam member 17 presses the roller 16. Since the state is kept in contact with the side edge 27a of the movement restricting concave portion 27 on the rotation direction side, the striking operation can be repeated at the same timing at all times, and the timing of the striking operation is not disturbed.

In the above embodiment, since the arcuate cam surface 19 protruding in the rotation direction of the cam member 17 is formed in the portion of the tip end side portion of the cam member 17 that overlaps the movement locus of the roller 16, the arcuate cam surface 19 is formed. The direction of action of the pressing force F exerted on the roller 16 from the surface 19 is the swing direction of the hammer 13 (roller 16
In the moving direction), and the hitting mallet 13 can be swung efficiently and smoothly.

Although the arcuate cam surface 19 is formed at the tip of the cam member 17 in the above embodiment, the shape of the cam surface of the cam member is not limited to this, and for example, as shown in FIG. The cam member 24 having the surface 23 may be adopted, or the cam member 26 having the curved cam surface 25 having a large radius of curvature may be adopted as shown in FIG.

Further, in the above embodiment, the convex portion 22 is provided on the drive shaft 18 so as to project, and the rotation restricting concave portion 21 is formed on the cam members 17, 24 and 26. However, conversely, the drive shaft 18 is formed on the drive shaft 18. The rotation restricting concave portion may be formed and the convex portions may be formed on the cam members 17, 24 and 26. For example, the connecting structure of the two may be appropriately changed.

In addition, according to the present invention, the cam surface is provided on the cam member at one or three or more places, and the firing operation (rocking of the hammer 13) per revolution of the cam member is performed once or three or more times. Various modifications such as “good” are possible.

[Advantages of the Invention] As is apparent from the above description, the present invention is configured such that the cam member is connected to the drive shaft so as to be reciprocally rotatable by the required angle θ, and the required angle θ is equal to that of the cam member. The radius of the contact is set to be slightly larger than the radius of the contact in terms of the turning distance of the tip, so that at the moment when the tip of the cam member comes off the contact, the rotation system (cam member and drive shaft ), The cam member is momentarily advanced by a predetermined angle in the direction of rotation, thereby reliably preventing the contact of the ball hammer from coming into contact with the back surface of the cam member during the striking operation. , The hitting motion can be stabilized, and the flight distance of the game ball can be stabilized.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention.
FIG. 1 is a rear view of a game ball launching device, FIG. 2 is an enlarged view showing movement loci of a cam member and a roller, and FIGS. 3 and 4 are rear views of cam members showing different embodiments of the present invention. , Fifth
The drawing corresponds to FIG. 1 showing a conventional example. In the drawing, 13 is a ball hammer, 16 is a roller (contact), 17
Is a cam member, 18 is a drive shaft, 19 is an arcuate cam surface, 21
Is a rotation restricting concave portion, 22 is a convex portion, and 24 and 26 are cam members.

Claims (1)

[Scope of utility model registration request] 1. A cam member rotatably driven by a drive shaft, a ball hammer having a contact protruding in a rotation region of the cam member, and a spring for urging the ball hammer toward a firing position. , The rotation of the cam member pushes the contactor against the spring in a direction opposite to the firing position, and when the tip of the cam member is disengaged from the contactor, moves the hammer into the direction of the firing position by the spring. The cam member is configured to be reciprocally rotatable with respect to the drive shaft by a required angle θ, and the required angle θ is a rotational distance of the tip of the cam member. The game ball launching device for a pachinko machine is characterized in that the radius is set to be slightly larger than the radius of the contactor.