JPS5820636B2 - Pachinko machine ball hammer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a batting mallet for a pachinko machine, and more particularly to an improvement in a hitting section that hits and launches pachinko balls.

As shown in Fig. 1, when punching out a shelf piece 1, a conventional ball mallet is equipped with a pin 2 on the front surface of its tip, and a coil spring 3 on the outer periphery of this pin that protrudes beyond the tip of the pin and hits the pachinko ball. It was fitted and formed the striking part.

In this case, the end of the spring wire at the tip of the coil spring that protrudes from the pin must be placed at the bottom in order to fire the balls evenly, but since the coil spring is simply fitted around the outer periphery of the pin, during use As it rotates around the pin, the end of the spring wire, which was positioned below, moves upwards, which adversely affects the ball's launch.

Also, the coil spring may become loose and come off the pin.

Furthermore, the tip of the coil spring should originally hit and launch the pachinko ball fed to the starting part of the ball guide rail, aiming at the center of gravity of the ball, but if the ball is slightly misaligned with the ball mallet relative to the pachinko machine. Due to this, the player may hit a ball away from the center of gravity, resulting in a poor flight of the ball.

In this case, the coil spring must be stretched a little or conversely shortened a little so that the tip of the coil spring hits the pachinko ball's center of gravity at the starting point of the ball guide rail. It is very difficult to adjust the length, that is, the position of the tip by stretching or contracting it, and it takes a lot of time and effort.

In view of the above, the present invention does not fit a coil spring to the outer periphery of a pin as in the past, but instead screws a screw shaft into the inner periphery of a coil spring and fixes it unrotatably to the tip of a shelf piece that is a coil spring.
This problem has been solved, and the present invention together with the new manufacturing method will be described with reference to FIGS. 2 and subsequent figures.

In the present invention, a through hole 4 is provided at the tip of the shelf piece 1 where the pin 2 was conventionally provided, one end of the coil spring 3 is inserted into this through hole, and the remaining part is made to protrude from the front surface of the tip of the shelf piece. A male screw 5 is inserted into the hole 4 from the rear surface of the shelf piece, and the male screw 5 is screwed into engagement with the inner periphery of one end of the coil spring contained in the hole and tightened.

The through hole 4 is preferably a female screw hole in which the outer periphery of the winding forming the coil spring 5 is screwed into the valley of the female screw, and the crest of the female screw is screwed into the valley between adjacent windings, as shown in the figure. The coil spring is preferably screwed into the hole, and the male screw 5 has a head 5a, and the thread of the screw shaft 5b is screwed into the valley between adjacent windings on the inner circumference of the coil spring. It is preferable that the inner periphery of the winding be screwed into the valley of the screw, but this is not necessarily the case.The through hole should be a cylindrical hole that matches the outer diameter of the coil spring, and If the male screw is screwed into the periphery, the coil spring can be pressed against the cylindrical inner periphery of the through hole by the male screw.

The male screw 5 is provided with an extension 5' at its tip that functions as a conventional pin, and when the screw is screwed in until the head 5a comes into contact with the rear surface of the shelf piece, the extension 5' protrudes from the front inside the coil spring. I'll make it like that.

As shown in Fig. 3, the shelf piece 1 is punched out from a thick metal plate of a conventional thickness so that a protrusion 1' is provided on one or both of the front and rear surfaces of the tip, and then the protrusion 1' is punched out. The tip is compressed and enlarged so that a through hole 4 into which one end of the coil spring is inserted can be opened, and the outer shape of this expanded portion 1a is trimmed into a circular shape, and a through hole 4 is opened in the center.

If the through hole 4 is to be made into a female screw hole, a pilot hole is opened and then a tap is inserted to make the hole into a female screw hole (Fig. 4).

In other words, the thickness of the conventional shelf piece is approximately the same as the outer diameter of the coil spring, or slightly thinner, but as described above, the tip is punched out with a protrusion, and this protrusion allows the tip to be held in place. When pressed, the thickness is the same as before except for the tip, so it can be used as is in conventional pachinko machines without redesigning the shelf pivot parts of conventional pachinko machines.

As is clear from the above, the present invention has one end of the coil spring inserted into the through hole or through female screw hole opened at the tip of the shelf piece, and the remaining part protruding from the front surface, and the male screw 5 inserted into the hole from the rear surface. is threadedly engaged with the inner periphery of one end of the coil spring to fix the coil spring to the shelf piece.

Therefore, it is necessary to use a coil spring that is longer than the conventional one only in the portion that fits into the hole in the shelf piece.

However, due to the screw engagement, it is fixed without being removed or rotated.

The position of the end of the spring wire pointing downward at the tip of the coil spring remains unchanged, and the flight of the ball is poor (does not change) during use.

Then, by removing the male screw, moving the coil spring in the in/out direction within the hole, adjusting the amount of protrusion from the front of the tip, and retightening the male screw, you can very easily hit the center of gravity of the pachinko ball. Can be adjusted.

Therefore, it has excellent functional features that more than compensate for the increase in length of the coil spring.

[Brief explanation of the drawing]

Figure 1 is a partially sectional side view of a conventional batting mallet;
The figure is a partially sectional side view of an embodiment of the batting mallet according to the present invention, FIG. 3 is a perspective view of a blank punched out from the batting mallet of FIG. 2, and FIG. This is a sloped view of the tip. In the figure, 1 is a shelf piece, 3 is a coil spring, 4 is a through hole,
5 indicates a male screw.

Claims (1)

[Scope of Claims] 1. A ball hammer for a pachinko machine in which a coil spring protrudes from the front surface of the tip of a shelf piece, in which the tip of the shelf piece has a through hole adapted to accommodate the coil spring. is provided with openings on the front and rear surfaces, one end of the coil spring is located in the through hole, and a male screw inserted from the rear surface of the tip engages with the inner periphery of the coil spring to attach the coil spring to the shelf piece. A ball mallet for a pachinko machine characterized by being adjustable and fixed. 2. A ball hammer for a pachinko machine according to claim 1, wherein the through hole opened at the tip of the shelf piece is a female threaded hole into which the outer periphery of the coil spring is screwed.