JPH0220265B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ball launcher that is attached to the lower part of the front frame of a pachinko machine, and in particular, a ball launcher that rotates a hammer arm by the rotation of a ball motor and fires a ball at the tip of the ball launcher. This invention relates to a ball launcher for a pachinko machine that hits the ball with a hand.

[Conventional technology]

In conventional pachinko machines, the strength of the elongated coil spring connected to the hammer arm is adjusted by rotating the operating handle located at the bottom of the front frame of the machine, thereby controlling the flight distance of the ball. The mainstream was a ball launcher that was configured to be able to adjust the distance. However, pachinko machines with this type of configuration require a large assembly space on the back of the front frame, and the parts that make up the ball launcher cannot be accurately assembled in the designated positions, resulting in poor workability. In an attempt to solve this problem, in recent years, ball launchers that are made up of various parts have been offered as a set.
An example of such a set ball launching device is a ball launching device disclosed in Japanese Patent Application No. 111036/1983. The ball launcher shown in Japanese Patent Application No. 52-111036 has a launcher shaft rotatably mounted on a mounting board on which each component is attached, and a launcher shaft (hammer arm) and a spiral spring. (Hammer arm spring) is fixed or penetrated, one end of the spiral spring is locked to the firing rod, and the other end is locked to the strength fine adjuster which is rotated by the rotation of the electric grip body (operation handle). The electric motor is fixed to a fixing plate that is fixed at a predetermined distance from the mounting board, and the strength fine adjuster, the electric motor's calm, and the firing rod are protrudingly provided within the space between the mounting board and the fixing plate. A portion that engages with the cam pin and a mechanism portion that transmits the rotational movement of the electric grip main body to the strength fine adjuster are arranged.

[Problem to be solved by the invention]

The ball launcher with the above configuration has the advantage that the space on the back of the front frame can be used effectively by being set up, but the strength fine adjuster for initial setting of the hammer arm spring is fixed. Since it is placed inside the plate, if the hammer arm spring deteriorates due to long-term use, it cannot be adjusted without removing the fixed plate, resulting in poor workability. Furthermore, since various mechanisms and electric motors are formed protruding from the back side of the mounting board, there is a problem in that when a set ball launcher is attached to the front frame, the protruding width becomes extremely large. .

The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce the space required for assembly to the back side of the front frame, and to ensure that the assembly can be assembled at a predetermined position on the front frame with extremely high precision. Needless to say, another object of the present invention is to provide a ball firing device for a pachinko machine in which the preset rotational biasing force of a hammer arm spring can be easily adjusted and in which no unnecessary parts protrude from the back side of the front frame.

[Means to solve the problem]

In order to achieve the above-mentioned object, the batted ball firing device of the present invention is provided with various parts constituting the batted ball firing device on a mounting board fixed to the back side of the front frame of the pachinko machine, and the mounting board has one end of the parts. The hammer arm system member including the hammer arm is provided with a coil spring whose other end is locked at a position where the hammer arm can be rotated in one direction. , a ball hitting motor that repeatedly rotates the hammer arm, and an adjustment mechanism that presets the rotational biasing force of the coiled spring are disposed, and a pivot support to which the hammer arm is fixed is disposed on the front surface of the mounting board. A bearing rotatably supports the shaft, a cam fixed to the output shaft of the ball-striking motor, a crank fixed to the pivot shaft and engaged with and disengaged from the cam, and fixed to the surface of the front frame. An actuation mechanism is disposed in conjunction with the operation of the provided operating handle and adjusts the rotational biasing force of the hammer arm.

[Effect]

Since the various parts including the coil spring that generates the rotational biasing force of the batted ball launcher are mounted on the mounting board, it can be installed extremely easily in the narrow space on the back of the front frame of the pachinko machine.
The positional relationship between each component is highly accurate, and the front surface of the mounting board includes a portion where the cam of the ball-striking motor engages with the crank that rotates integrally with the hammer arm, as well as an operating mechanism that adjusts the operating handle and rotational bias force. Since the part that is engaged with is located on the back side of the mounting board, the part that protrudes from the back side of the front frame of the pachinko machine can be extremely reduced. Since an adjustment mechanism for setting the biasing force in advance is provided, the ball firing device can be easily set at any time while being attached to the back of the pachinko machine.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of a ball launcher for a pachinko machine according to the present invention, and a mounting board 21 of the ball launcher 20 includes a hammer arm mechanism 22 for launching a ball, An actuation mechanism 23 is provided in association with the hammer arm mechanism 22, and a coil spring 24 that rotationally biases the hammer arm 25 of the hammer arm mechanism 22 in accordance with the operation of the actuation mechanism 23.

As shown in detail in FIGS. 3A to 3C, the hammer arm mechanism 22 is disposed on the back side of the mounting board 21, and a hammer arm 25 that hits the ball with a tip head 26 is connected to a bearing 27 via a spacer 29. The bearing 27 is fixed to the pivot shaft 28 received by the mounting board 21 with a spring washer 31 and a nut 32.
It is formed to protrude from the front side. One end of a crank 35 extending in the radial direction is fixed to the tip of the pivot shaft 28 that protrudes from the head 34 of the housing 33 of the bearing 27, and the other end of the crank 35 is attached to a cam 82 of a ball hitting motor 80, which will be described later. A pin 36 is implanted that can be engaged with. Hammer arm mechanism 2
2 is configured as described above, so the bearing 2
7 is located in a mounting space 21a formed by the mounting board 21, a handle board 84 (described later), and a through hole drilled in the front frame 2, as shown in FIG. The hammer arm 25, the pivot shaft 28, and the crank 35 of the hammer arm mechanism 22 constitute a hammer arm system member that rotates integrally with the hammer arm 25.

Note that the bearing 27 used in this example is as follows:
As shown in FIG. 4, the ball bearing 5 of the bearing 27
It has only an inner ring spacer 60 provided between the inner rings 56 and 57 without providing an outer ring spacer provided between the outer rings 58 and 59 of the housing 33 and the ball bearing 54. A wave washer 62 is arranged between the side surface and the side surface.
Outer rings 58, 5 of the ball bearings 54, 55
9 is configured to apply a strut load acting in the direction of the hammer arm, and is configured so that no gap is created between the ball bearings 54 and 55. This prevents the pivot shaft 28 from vibrating due to wear of the ball bearings 54, 55, etc.
The ball hitting position of No. 5 is stabilized so that the ball can be fired accurately.

A coiled spring 24 made of, for example, a coil spring is attached to the pivot shaft 28 of the bearing 27, and the nut 32 of the hammer arm 25 is attached to the pivot shaft 28 of the bearing 27.
is used as a spacer, and the pivot shaft 28 is inserted into a hole 65 formed by the coiled spring 24, so that it is rotatably supported by a nut 67 via a presser washer 66. One end of this coiled spring 24 is
In the engaging portion 68 formed on one side of the hammer arm 25,
The other ends are respectively engaged with adjustment mechanisms 70, which will be described later, so as to bias the hammer arms 25 in the ball flight direction, that is, in the clockwise direction as viewed in FIG.

Note that one end of the coiled spring 24 may be locked to the hammer arm system member, for example, the pivot shaft 28, which rotates together with the hammer arm 25.

The adjustment mechanism 70 includes an adjustment gear 71 mounted on the back side of the mounting board 21 at an appropriate position that is easy to operate, and an adjustment piece 72 shaped like a parallelogram, for example, formed at an eccentric position on the upper surface of the adjustment gear 71. , and a locking groove 73 formed on the side surface of the adjustment piece 72, and the other end of the coiled spring 24 is connected to the adjustment piece 72.
It is locked in the locking groove 73 or the like.
Thus, the clockwise rotation of the adjustment gear 71 is restricted by a stopper member 74 formed of a leaf spring. Note that clockwise rotation is possible if the stopper member 74 is removed from the adjustment gear 71. Since the adjustment mechanism 70 is provided on the back side of the mounting board 21 in this way, even if the coil spring 24 deteriorates due to long-term use, it can be easily wound by operating the adjustment piece 72 from the back side of the pachinko machine 1. The settings of spring 24 can be preset.

Incidentally, the adjustment piece 72 can also be oval-shaped, and is essentially placed on the back side of the mounting board 21 so that the locking position of the coiled spring 24 can be changed by changing the elastic force as the adjustment gear 71 rotates. It is sufficient if it can be easily changed at any time.

Furthermore, in the present embodiment described above, the case where the coiled spring 24 is attached to the pivot shaft 28 of the bearing 27 has been explained, but the coiled spring 24 is attached to the mounting board 2.
The mounting shaft can be provided at an appropriate position that can provide a rotational bias force above 1. Further, the coil spring 24 may be attached to an appropriate position on the front side of the mounting board 21 instead of on the back side to provide a rotational biasing force. In this case, the adjustment mechanism 70 for changing the rotational biasing force of the coiled spring 24 will also be provided on the front side of the mounting board 21, but only the adjustment piece 72 will be located on the back side of the mounting board 21. The rotational biasing force of the coiled spring 24 may be adjustable. Also, the code 69 is
This is a stopper member of the hammer arm 25 for blocking the biasing of the coiled spring 24 at a predetermined position.

Further, a ball hitting motor 80 for rotating the ball firing hammer arm mechanism 22 within a predetermined angle range is mounted on the mounting board 2.
1 , and its output shaft 81 is provided to protrude to the front side of the mounting board 21 . A cam 82 having three pawls 83 formed at equal intervals is fixed to the tip of the output shaft 81, and the three pawls 83 of the cam 82 are implanted at the tip of the crank 35. The pins 36 are sequentially and repeatedly operated.

Further, on the front side of the mounting board 21, an operating mechanism 23 is provided for adjusting the rotational biasing force of the hammer arm 25 of the batted ball firing hammer arm mechanism 22. This actuating mechanism 23 is composed of two gears 88 and 89, as shown in FIG. However,
A handle board 84 to which an operating handle 85 is fixed is provided on the surface of the front frame 2 in correspondence with the operating mechanism 23 . A sector gear 87 is connected to the ball hitting force adjustment lever 86 of the operation handle 85, and the sector gear 87 meshes with the small gear 88 of the operating mechanism 23 when the handle base plate 84 is attached to the front frame 2. There is. Therefore, by rotating the hitting force adjustment lever 86, the fan-shaped gear 8
7 and a small gear 88 to rotate a large gear 89. Further, a tension spring 90 is tensioned between the large gear 89 and the crank 35 so as to bias the crank 35 in a counterclockwise direction as seen in FIG. A micro switch 91 is provided which is turned on based on the rotation of the ball hitting motor 87. When the micro switch 91 is turned on, a predetermined current is supplied to the ball hitting motor 80. Further, as described above, the engagement between the sector gear 87 of the operating handle 85 and the small gear 88 of the operating mechanism 23 takes place within the mounting space 21a.

The above is an example of the configuration of the ball launcher for a pachinko machine according to the present invention.
When the player rotates the ball hitting force adjustment lever 86 of the operation handle 85 in the X direction shown in FIG.
The sector gear 87 rotates, and this rotation causes the small gear 8
A large gear 89 rotates through the crank 35, and a tension spring 90 is stretched between the large gear 89 and the crank 35.
is pulled, increasing the biasing force that biases the crank 35 in the counterclockwise direction as seen in FIG.
is continuously rotated reciprocally by the three pawls 83 of the cam 82, and therefore the hammer arm 25, which is rotatably attached to the bearing 27, can be operated continuously and repeatedly. The balls supplied to the ball firing section can be continuously fired by the automatic ball feeding device, and by changing the rotational position of the ball hitting force adjustment lever 86, the balls can be fired at different initial velocities. .

In the embodiment described above, the biasing force of the hammer arm 25 is increased by the tension spring 90 stretched between the large gear 89 and the crank 35.
A structure different from this may be used, as long as the biasing force of the hammer arm 25 is changed by the rotational movement of the ball-hitting force adjustment lever 86.

〔Effect of the invention〕

As is clear from the above description, in the ball launcher of the present invention, various parts including a coil spring that generates a rotational biasing force of the ball launcher are mounted on the mounting board, so that the front frame of the pachinko machine is It can be installed extremely easily in a narrow space on the back of the board, and the positional relationship between each part is highly accurate.The cam of the ball-striking motor and the crank that rotates integrally with the hammer arm are engaged on the front of the mounting board. and the part where the operation handle and the operating mechanism that adjusts the rotational bias force are engaged are arranged, so that the part that protrudes from the back side of the mounting board, that is, the back side of the front frame of the pachinko machine, is extremely minimized. Moreover, since an adjustment mechanism is provided on the back of the mounting board to preset the rotational biasing force of the coiled spring, it is possible to easily set the ball launcher at any time while it is attached to the back of the pachinko machine. .

[Brief explanation of drawings]

1 and 2 are back views of the mounting board showing different adjustment states of the adjustment mechanism of the ball firing device of a pachinko machine according to the present invention, FIG. 3A is a cross-sectional view showing the hammer arm mechanism for firing balls, 3B is an exploded perspective view of FIG. 3A, FIG. 3C is a detailed view of the pivot shaft, FIG. 4 is a cross-sectional view of the ball launcher, and FIG. 5 is a front view of the mounting board showing the operating mechanism. , FIG. 6 is a rear perspective view of the operating handle. In the figure, 2...Front frame, 20...Battered ball launcher, 21
... Mounting board, 23... Operating mechanism, 24... Wrapped spring,
25... Hammer arm, 27... Bearing, 28... Pivot shaft, 35...
Crank, 70... Adjustment mechanism, 80... Ball hitting motor,
81...Output shaft, 82...Cam, 85...Operation handle.

Claims (1)

[Scope of Claims] 1. A ball launcher for a pachinko machine that rotates a hammer arm by rotation of a ball motor and hits a ball with its tip head, comprising: a hammer arm system member of the ball launcher; and a ball launcher. The motor and the adjustment mechanism are installed on a mounting board that is fixed to the back side of the front frame of the pachinko machine, and the mounting board has one end connected to a hammer arm system member including the hammer arm, and the other end of which connects the hammer arm in one direction. coil springs each locked at a position where the hammer arm can be rotated and biased are provided, and on the back surface of the mounting board are at least the hammer arm and the ball hitting motor that repeatedly rotates the hammer arm;
Adjustment parts of an adjustment mechanism for presetting the rotational biasing force of the coiled spring are arranged independently and separately, and a pivot shaft to which the hammer arm is fixed is rotatably mounted on the front surface of the mounting board. a cam fixed to the output shaft of the ball-striking motor; a crank fixed to the pivot shaft and engaged with and disengaged from the cam;
A ball firing device for a pachinko machine, characterized in that an operating mechanism is disposed that is interlocked with the operation of an operating handle fixed to the surface of the front frame and adjusts the rotational biasing force of the hammer arm.