JPH048940Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a ball firing device for a pachinko machine, which is equipped with a pulley around which a spring is wound that gives a striking force to a hammer.

(Prior Art) Conventionally, in the ball firing device of a pachinko machine, as disclosed in, for example, Japanese Utility Model Application Publication No. 60-9428, a spring that provides striking force to a hammer is wound around a pulley, and the amount of winding is changed. A ball launcher is known in which the tension of a spring is adjusted by adjusting the tension of a spring.

(Problem to be solved by the invention) However, when the spring is wound around the pulley in this way, due to the contact between the spring and the pulley,
Due to the force exerted by the spring against the contact surface of the pulley, adjusting the tension of the spring by operating the operating handle may not work properly. In other words, friction may cause friction between the spring and the pulley, and the spring may not expand or contract uniformly at the contact portion with the pulley.

This affects the operation of the hammer and the firing force is not constant, causing the ball to fly at different distances, causing problems in the game.

The present invention was developed in view of these circumstances, and even when the spring is wrapped around a pulley, it reduces the amount of extra friction applied to each part of the spring, and allows the ball to be launched stably. The present invention aims to provide a ball firing device for a pachinko machine that allows the ball to be fired.

(Means for Solving the Problems) That is, the ball firing device for a pachinko machine according to the present invention is a ball firing device for a pachinko machine that is equipped with a pulley around which a spring that gives a striking force to a hammer is wound.
The present invention is characterized in that a rotating roller is provided on the outer periphery of the pulley.

(Function) By providing a large number of rotating rollers on the outer periphery of the pulley that contacts the spring in this way, the contact area between the spring and the pulley is reduced, reducing unnecessary friction on the spring, and further By rotating the rotating roller itself, the tension applied to the spring before and after the contact portion between the spring and the rotating roller is adjusted to be uniform, so that the spring can be smoothly expanded and contracted by the operation of the hammer.

(Example) Hereinafter, an example will be described with reference to the drawings. However, the dimensions, materials, shapes, etc. of the component parts described in this example are not intended to limit the scope of the present invention, unless otherwise specified, and are merely illustrative examples. Only.

The figure shows an embodiment in which the present invention is applied to a pulley 1 used in a spring tension adjustment section 30.

The pulley 1 is attached to a shaft 4 provided on a mounting plate 5 of a spring tension adjustment section 30, as shown in FIG.
A spring 20 is wound around its outer periphery.

A plurality of rotating rollers 2 are provided on the outer periphery of the pulley 1, as shown in FIGS. 1 and 2. A shaft 3 of the rotating roller 2 is rotatably fitted into a groove 4 provided on both side peripheral edges of the pulley 1.
Note that the means for fixing the rotating roller 2 to the pulley 1 is not particularly limited.

As shown in FIG. 3, the rotating roller 2 preferably has a concave outer surface, which is approximately the same as the outer surface shape of the spring 20, so as to stabilize the position of the spring 20. However, in the present invention, it may be simply a straight line.

Here, the spring tension adjustment section 30 will be explained.
As shown in FIGS. 5 and 6, the spring tension adjustment section 30 includes a pulley 1 around which the spring 20 is wound,
A knob 11 is provided for adjusting the tension of the spring 20, and the tension of the spring 20 can be adjusted by rotating the knob 11. The knob 11 and the pulley 1 are connected by gears 6 and 7.

The pulley 1 is supported by a shaft 5 attached to a mounting plate 16. Further, a gear 6 is provided integrally with the pulley 1. A fastening member 15 is provided on the gear 6, and one end of a spring 20 is fastened thereto.

The gear 7 meshes with the gear 6, and a locking projection 8 provided on the side surface meshes with a locking projection 9 provided on the top plate 13 of the spring tension adjustment section 30. A spring 10 is sandwiched between the knob 11 and the top plate 13, and the gear 7 is always biased toward the top plate 13, and is connected to a locking protrusion 8 provided on the side surface and the top plate 13. The locking protrusions 9 are engaged with each other and fixed so as not to move.

When the knob 11 is pressed against the elastic force of the spring 10, the locking protrusions 8 and 9 are disengaged, thereby allowing the knob 11 to be rotated. By rotating this knob 11, the gear 6 that meshes with the gear 7 is rotated, and the spring 20 is rotated.
The tension can be changed.

Changes in the tension of the spring 20 are indicated by a scale needle 12, which is provided integrally with the gear 6 and is located on the top plate 13.

Spring tension adjustment member 30 having such a structure
As shown in FIG. 6, the fastening member 14 of the top plate 13
The striking force of the hammer 21 can be adjusted by operating an operating handle 23 that pulls a wire 22, one end of which is fixed to.

Now, the hammer 21 is driven by a motor 24 as shown in the fifth figure.
The rotation causes repeated reciprocating motion in the direction of arrow 29. Each time the force applied to the spring 20 becomes stronger or weaker, the spring 20 expands and contracts. At this time, as shown in FIG. 4, when the hammer 21 is pulled and the spring 20 tries to extend in the direction of the arrow 27,
The rotating roller 2 rotates in the direction of the arrow 25, and the hammer 21 comes off the cam 25 of the motor 24 and the spring 2
When 0 is about to contract in the direction of arrow 28, the rotating roller 2 rotates in the direction of arrow 26. Therefore, the tension applied to the spring 20 before and after the contact portion between the spring 20 and the rotating roller 2 is adjusted to be uniform. This allows the spring 20 to expand and contract smoothly.

7 and 8 show another example of the present invention, in which a ring-shaped rotating roller 2 is provided around the outer periphery of the pulley 1. FIG. This rotating roller 2 is a pulley 1
It has a structure that allows it to rotate freely.

The present invention is applicable to a pulley used as a spring tension adjustment member for adjusting the tension of a spring as shown in the embodiment, as well as a guide pulley used as a pulley for winding a spring to change the direction of the spring. It is also possible to do so.

The present invention includes not only cases in which the spring is wound around the entire pulley, but also cases in which the spring is partially wound around the pulley.

(Effects of the invention) As described above, according to the invention, a large number of rotating rollers are provided on the outer periphery of the pulley that is wound around the spring that applies impact force to the hammer. In addition, the tension applied to the spring before and after the contact area between the spring and the rotating roller is adjusted to be uniform due to the rotation of the rotating roller itself, and the tension applied to the spring by the operation of the hammer is reduced. can be expanded and contracted smoothly.

Therefore, a stable striking force can be applied to the hammer, the flight distance of the batted ball will not vary, and the problem of interference between the spring and the pulley that interferes with the game can be solved. .

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a pulley provided in a ball firing device for a pachinko machine according to the present invention, FIG. 2 is a side view of the pulley, and FIG. 3 is a partially cutaway enlarged view of the pulley shown in FIG. Fig. 4 is a plan view of the spring wound around the pulley, Fig. 5 is a schematic plan view of the entire ball launcher, Fig. 6 is a partially cutaway side view of the spring tension adjustment section, and Fig. 7 is the pulley. A partially cutaway enlarged view of another example of
FIG. 8 is a plan view of a state in which a spring is wound around the pulley shown in FIG. 7. In the figure, 1 is a pulley, 2 is a rotating roller, and 30 is a spring tension adjusting member.

Claims (1)

[Scope of utility model registration request] 1. A ball firing device for a Pachinko machine comprising a pulley around which a spring is wound for applying a striking force to a hammer, the ball firing device for a Pachinko machine being characterized in that a rotating roller is provided on the outer periphery of the pulley.