JPH0410871Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a ball force adjustment device for a pachinko machine.

(Prior art) The ball device of a pachinko machine uses an electric cam to drive a ball mallet to perform a ball motion, and the strength of the ball spring can be controlled by the player using a ball handle. In addition to this structure, a ball force adjustment device is also provided so that the spring strength can be adjusted by the pachinko parlor. A typical conventional ball force adjusting device has a shape shown in FIG. A large number of sharp clutch teeth 51 are provided as shown in the figure, and normally they are pressed against each other by a spring to mesh so that relative rotation does not occur. Both discs were separated to allow relative rotation by a desired number of teeth. However, the conventional system had the disadvantage that it was difficult to tell how many rotations the disks had been rotated relative to each other during operation because they could not be rotated relative to each other unless the two disks were completely separated. In order to overcome this drawback, clutch teeth 52 that are inclined on both sides are sometimes provided as shown in Fig. 6, but such a tooth profile loosens and becomes loose when a strong axial force is not applied. Since there is a risk of the device rotating, it is held down by an extremely strong spring, which has the disadvantage of making adjustment work difficult.

(Problems to be solved by the invention) This invention solves the above-mentioned conventional problems, and makes it possible to adjust the spring force by several threads even when adjusting the spring force in a noisy pachinko hall. It was completed with the aim of creating a ball force adjustment device for pachinko machines that is easy to understand and easy to adjust.

(Means for Solving the Problems) The present invention provides a joint surface between a first disk rotated by a ball handle and a second disk connected to a ball spring to change the spring strength. The tooth profile of a large number of clutch teeth formed on the disk is made up of a locking surface that is substantially perpendicular to the rotating surface of these disks, and an inclined surface that extends from the lower end of the locking surface toward the top of the adjacent tooth profile. It is characterized by having a small inclined surface inclined toward the locking surface side at each tooth tip.

(Embodiment) Next, the present invention will be explained in detail with reference to the illustrated embodiment. In FIGS. 3 and 4, 1 is a substrate, 2 is
3 is a gear in which a ball spring 4 is housed in a case 5, and the tip of the mallet core rod 6 of the ball mallet 2 has a disc that also serves as a case cover. 7 is provided, and the protrusion 8 on the back surface engages with one end of the ball spring 4, so that the ball mallet 2 is resiliently ejected by the ball spring 4.
As shown in an enlarged view in FIG.
The first disk 10 is connected by a wire 14 to a pulley 13 coaxially fixed to the ball handle 12. Further, the outer peripheral surface of the second disk 11 is the gear 1.
5, and meshes with the gear 3 described above. A large number of clutch teeth 16 are formed on the joining surface of the first disk 10 and the second disk 11, and a spring 18 is provided around the shaft 17.
are pressed together and engaged with each other.

In the present invention, each of these clutch teeth 16
The tooth profile of these first and second disks 10, 11
a locking surface 19 in a direction substantially perpendicular to the rotational surface of the
Not only is the locking surface 19 shaped like a saw blade with an inclined surface 20 extending from the lower end of the tooth toward the top of the adjacent tooth profile, but also a small sloped surface 20 is formed at the tip of each tooth. An inclined surface 21 is formed. In the illustrated embodiment, the inclined surface 20 is set at approximately 45 degrees with respect to the rotating surface of the disc, but the angle is not necessarily limited to this, and the angle of the small inclined surface 21 can also be selected as appropriate. Note that a shaft 22 is integrally attached to the first disc 10, and the second disc 11 is rotatably supported on the outer periphery of this shaft 22.

(Function) In the device configured as described above, the first disk 10 and the second disk 11 are normally connected as shown in FIG.
and are engaged with each other by a large number of clutch teeth 16 formed on the joint surfaces of both, so when the first disc 10 is rotated via the wire 14 by operating the ball handle 2, the second disc 10 is rotated. 11 also rotates integrally, and the gear 15 on the outer periphery of the second disk 11 rotates the gear 3 in which the spring 4 for the bullet is housed to change the spring strength. This allows the force to be adjusted. In the present invention, there is a disc 1 in the tooth profile of the clutch tooth 16.
Since the locking surface 19 is formed substantially perpendicular to the rotating surfaces of the disks 1 and 11, in the state shown in FIG.
The locking surfaces 19 of the clutch teeth 16 of 0 and 11 come into contact with each other on a plane perpendicular to the rotating surface,
Since no force is applied in the direction of separating both disks 10 and 11, there is no need to make the elastic force of the spring 18 very strong. In addition, when adjusting the ball force on the pachinko parlor side, the shaft 22 is pushed in slightly against the spring 18, and as shown in FIG.
The first disk 10 is shifted in the axial direction to a position where the two disks touch each other. If the first disk 10 is rotated via the shaft 22 in this state, both clutch teeth 16 will rotate easily due to the sliding action of the small inclined surface 21, and each time they pass over one tooth profile, a clicking sound will be heard. stand up. Therefore, the ball force adjustment device of the present invention allows you to easily know how many pitches have been adjusted even in a noisy pachinko hall, and also allows you to adjust the ball force without making the spring force of the spring 18 very strong. There is no need to worry about the clutch teeth 16 coming off each other, so there is an advantage that adjustments can be made easily.

(Effects of the invention) As is clear from the above explanation, the amount of adjustment can be easily determined by devising the tooth profile of the clutch teeth, and the adjustment work is easy, so the present invention is superior to the conventional one. As a ball force adjustment device for pachinko machines that solves the problem, its practical value is extremely large.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view showing a state during adjustment, Fig. 3 is a partially cutaway front view of the entire ballistic device incorporating the device of the present invention,
FIG. 4 is a partially cutaway plan view thereof, and FIGS. 5 and 6 are enlarged front views of the conventional tooth profile. 4...Bullet spring, 10...First disk, 11
...Second disc, 12...Bullet handle, 16
...Clutch tooth, 19...Locking surface, 20...Slope surface, 21...Small slope surface.

Claims (1)

[Scope of utility model registration request] A large number of clutch teeth 16 formed on the joint surface of the first disk 10 rotated by the ball handle 12 and the second disk 11 connected to the ball spring 4 to change the spring strength. A locking surface 19 substantially perpendicular to the rotating surface of these discs, and a locking surface 1
It has a saw blade shape with an inclined surface 20 extending from the lower end of the tooth profile 9 toward the top of the adjacent tooth profile, and furthermore, a small inclined surface 21 that is inclined toward the locking surface 19 is formed at the tip of each tooth. Features a ball force adjustment device for pachinko machines.