JPH0229978Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a pachinko ball in which a batting mallet that applies a striking force to a pachinko ball is driven by a cam action between a pin implanted in the batting mallet and a cam rotationally driven by a motor. Concerning improvements to launchers.

The conventional pachinko ball launcher was developed by a patent application filed in 1983.
As shown in No. 72266, one of its components, the batting mallet, is connected to a spring force adjustment mechanism that stores repulsion energy, and has a pin implanted therein, which is connected to a motor. The batting mallet was driven by the action of a cam.

However, the pin and cam are made of metal, and therefore, when the pin is engaged with the cam, noise is generated and the pin and cam are worn.

By the way, as a means to solve this problem, a method can be considered in which a cylindrical roller made of plastic or the like having low frictional resistance with respect to the pin is rotatably attached to the pin. However, in that case, slippage occurs between the roller and the cam, and sufficient rotational force is not applied to the roller, and the roller does not rotate much with respect to the pin. There is a risk that the rollers may wear out prematurely or wear unevenly. Since this wear and uneven wear occurs near the spindle of the batting mallet, the amount of wear and uneven wear is magnified at the tip of the batting mallet, and the distance between the pachinko ball on the firing section at the lower end of the firing rail and the tip of the batting mallet. In other words, it is not possible to make the amount of rotation of the tip of the batting mallet uniform.

As a result, the above-described wear and uneven wear cause uneven hitting force, making it impossible to uniformly launch pachinko balls. For this reason, even if a predetermined grip adjustment is performed, a stable hitting force cannot be obtained, and it becomes difficult to hit a specific spot during a pachinko game. As described above, in order to obtain a stable and desired impact force, the engagement between the cam and the roller must be established reliably, and the engagement must be performed smoothly without slippage.

Even in such a case, the present invention provides a batting mallet for applying a striking force to the pachinko ball, a spring force adjustment mechanism for adjusting the striking force of the batting mallet, and a pulley section for adjusting the spring force adjusting mechanism. A pin is implanted in the batting mallet, and a roller having an inner layer and an outer layer integrally formed therein is rotatably fitted loosely into the pin, so that the inner circumferential surface of the inner layer is connected to the pin. an eccentric cam (hereinafter referred to as
The purpose is to provide a roller (simply referred to as a cam) and make the friction coefficient of the outer layer larger than that of the inner layer to reduce wear on the roller due to the cam action.

An embodiment of the present invention will be described below. In FIG. 1, a support shaft 2 is rotatably attached to a fixed member 1 attached to the back side of a pachinko machine, and the base of a ball hammer 3 is fixed to the support shaft 2. The tip of the ball hammer 3 faces the firing section 4A at the lower end of the firing rail 4.

A spring force adjustment mechanism 5 is fixed near the ball hammer 3. The spring force adjustment mechanism 5 is linked via a connecting rod 7 to a pin 6 implanted in the middle part of the ball hammer 3 (preferably in the vicinity of the support shaft 2). is also linked to the pulley portion 9a of the grip 9 via the wire 8, and the spring force within the spring force adjustment mechanism 5 is adjusted by the amount of rotation of the grip 9, and when the batting mallet 3 is driven by a cam to be described later. The repulsion energy given to the batting mallet 3 can be changed, that is, the striking force can be adjusted. The cam 13 is rotationally driven by the motor 12 and intermittently engages with the roller 11, thereby causing the ball hammer 3 to swing while rotating the roller 11.

The details of this spring force adjustment mechanism 5 have already been disclosed in Japanese Patent Application No. 55-72266, so
A detailed explanation thereof will be omitted.

A pin 10 is protruded from the ball hammer 3, and a roller 11 is rotatably loosely fitted onto the pin 10, and a cam 13 connected to a motor 12 is connected to an outer layer (described later) 11a of the roller 11. When engaged, the ball hammer 3 is driven in the direction of the arrow in FIG. At this time, the inner peripheral surface of the inner layer 11b, which will be described later, is brought into sliding contact with the pin 10.

As shown in FIGS. 2 and 3, the roller 11 is composed of two layers: an outer layer 11a forming an outer circumferential surface and an inner layer 11b forming an inner circumferential surface, and both 11a and 11b are integrated. ing. Outer layer 11a
is made of a material whose coefficient of friction is larger than that of the inner layer 11b and which reliably receives the force transmitted from the cam 13 as a rotational force,
The material used is polyurethane (the coefficient of friction of polyurethane is 0.4 or more). inner layer 11
b is made of a material whose coefficient of friction is smaller than that of the outer layer 11a and which has low rotational resistance to the pin 10, and the material includes so-called reinforced DURACON (trade name) made of polyacetal resin. The friction coefficient of is 0.15~
0.2) is used.

Note that it is desirable that both the outer layer 11a and the inner layer 11b have wear resistance. Furthermore, in order to more reliably receive the force caused by the cam action as the rotational force of the roller, the outer layer preferably has enough elasticity to allow the cam to bite into it.

In the pachinko ball launcher with the above configuration, when the grip 9 is turned in the direction of the arrow in FIG.
The spring force of the spring force adjustment mechanism 5 gradually increases through . Further, a motor switch (not shown) is turned on by the rotation of the grip 9, and the motor 12 is activated to rotate the cam 13.
The ball hammer 3 is rotated by a certain amount in the direction of the arrow by slidingly contacting the outer layer 11a of the roller 11 loosely fitted to the pin 10 and slidingly contacting the inner peripheral surface of the inner layer 11b with the pin 10. As a result, repulsion energy is stored in the spring force adjustment mechanism 5.

At this time, the friction coefficient of the inner layer 11b of the roller 11 is considerably smaller than that of the outer layer 11a.
The rotational resistance against the pin 10 is small (the friction coefficient of Jyuracon (product name) is 0.15 to 0.2), while the outer layer 1
1a has a friction coefficient considerably larger than that of the inner layer 11b (the friction coefficient of polyurethane is 0.4).
As described above), since the force due to the cam action is also received as a rotational force, the roller 11 rotates smoothly due to the rotational force. Therefore, the rotation of the roller 11 can significantly reduce wear on the outer layer 11a due to engagement between the outer layer 11a and the cam 13. Also, pin 1
There is no need to supply lubricating oil between the inner layer 11b and the inner layer 11b, and at the same time, no abnormal noise is generated.

Further, since the friction coefficient of the inner layer 11b is smaller than that of the outer layer 11a, the roller 11 can be rotated smoothly without slipping, and wear and uneven wear of the inner layer 11b can be prevented. As a result, the cam 13 is rotated by the motor 12 and slides into contact with the roller 11 to drive the ball hammer 3, but as described above, the inner layer 11b is worn out,
In particular, since uneven reduction is suppressed as much as possible, the rise is good, and the firing section 4A of the firing rail 4
The rotation distance between the upper pachinko ball and the tip of the batting mallet 3 becomes constant, and a stable driving force can be reliably supplied to the batting mallet 3 via the pin 10, so that a stable hitting force can be obtained. can.

As is clear from the experimental results shown in Figures 4 and 5, the roller according to the present invention is more effective in terms of durability than the roller made only of materials with low frictional resistance. .

When the cam 13 comes off the roller 11, the ball mallet 3 returns to its original position due to the repulsive energy of the spring force adjustment mechanism 5, and strikes the pachinko ball on the firing section 4A.

In addition, in the case of the present invention, it is only necessary to determine the material forming the outer circumferential surface and the material forming the inner circumferential surface.
Any material may be used as the material interposed between the material forming the outer circumferential surface and the material forming the inner circumferential surface.

Furthermore, in this embodiment, if the wall thickness of the roller 11 is increased, the rotational force of the roller 11 becomes even greater, and the roller becomes easier to rotate.

In this case, if the inner diameter formed by the inner circumferential surface is reduced, the space occupied by the roller does not need to be increased.

As is clear from the above, the present invention not only prevents the occurrence of abnormal noises and wear of the pin and cam, but also prevents the roller from being attached to the pin installed in the ball hammer under the action of the cam. On the other hand, since the roller rotates smoothly, wear on the roller caused by the cam can be significantly reduced.

Note that if the coefficient of friction of the outer layer is set to a much larger value than that of the inner layer, and the cam is made to have enough elasticity to bite into it, when the cam and roller engage, the contact area between the two will increase. By doing so, the rotation and rising of the roller 11 are performed more smoothly, so that the impact force can be further stabilized.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a pachinko ball firing device showing one embodiment of the present invention, FIG. 2 is a front view showing one embodiment of a roller according to the present invention, and FIG.
Figure 4 is a perspective view of the figure, Figure 4 is a diagram showing durability when using a roller made only of materials with low frictional resistance, Figure 5 is a diagram showing durability when using a roller according to the present invention. It is. 3... Ball hammer, 10... Pin, 11... Roller, 11a... Outer layer, 11b... Inner layer, 13...
eccentric cam.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A batting mallet for applying a striking force to pachinko balls, a spring force adjustment mechanism for adjusting the striking force of the batting mallet, and a pulley portion for adjusting the spring force adjusting mechanism. A pin is implanted in the batting mallet, and a roller having an inner layer and an outer layer integrally formed thereon is rotatably fitted loosely into the pin, and the inner circumferential surface of the inner layer is attached to the pin. An eccentric cam is provided which slides into sliding contact with the roller, is rotationally driven by the motor, and intermittently engages with the outer layer of the roller to rotate the roller while swinging the ball hammer. A pachinko ball launcher characterized by being larger. (2) Utility model registration Claim 1, wherein the outer layer is made of polyurethane resin and the inner layer is made of polyacetal resin.