JPH0324200Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ball launching device for an electric pachinko machine.

Generally, in the ball launcher of electric pachinko machines,
In the case of a ball launcher that is installed to apply a batting force to a firing rod through the torsional force of a coil spring, the shaft is pivotally supported by a bearing tube fixed to a mounting board, and the firing rod is attached to both ends of the shaft. and a disc body are respectively fixed, and the above-mentioned coil spring is interposed between the disc body and a hitting force adjustment ring which is loosely fitted into the bearing cylinder and faces the disc body, and a rotary spring that is interlocked with the operating handle. The ball-hitting force adjustment ring is connected to the ball-hitting force adjustment ring by a wire, and by rotating the operating handle and pulling the wire, the ball-hitting force adjustment ring is rotated to adjust the strength of the ball-hitting force. It is configured to do the following. However, in the case where the rotation of the trochanter is transmitted to the ball hitting force adjustment ring via a wire as described above, there is a disadvantage that the wire is easily cut, and the rotation of the trochanter is transmitted to the ball hitting force adjustment ring via a wire. When the ball hitting force adjustment ring is rotated as described above, a reaction force as the restoring force of the coil spring acts on the ball hitting force adjustment ring, and this reaction force is transmitted to the operating handle and puts a strain on the player's hands and fingers. This has the disadvantage that it takes a lot of time and causes fatigue in a short period of time.
Also, it is necessary to adjust the spring force so that the ball can be launched to the desired position on the board within a certain rotation range of the operating handle, but since the coil spring itself has errors, it is necessary to adjust the spring force. The reality is that it is difficult to make fine adjustments.

This invention is an attempt to improve the conventional situation in view of the above-mentioned actual situation, and it is possible to reliably connect the trochanter and the ball hitting force adjustment ring without using wires, and it is possible to easily rotate the operating handle. The purpose of this invention is to enable fine adjustment of the spring force of the coil spring. A hook-shaped part formed by bending one end of the coil spring toward the outer circumferential direction is engaged with the comb-teeth part, and an annular engagement groove is cut into the comb-teeth part so as to divide the comb-teeth part into left and right parts. A retaining ring is fitted into the engagement groove, and a coiled balance spring with a weaker elasticity than the above-mentioned coil spring is interposed in the batting force adjustment ring. The trochanter is divided into an upper rotating body and a lower rotating body, and both rotating bodies are biased in a direction in which sawtooth surfaces formed on the divided parts mesh with each other. In addition, the gear fixed to the lower rotating body is configured to mesh with the fan-shaped gear formed on the ball hitting force adjustment ring.

Hereinafter, specific embodiments of the present invention will be described with reference to the illustrative drawings. In the drawings, reference numeral 1 indicates a ball launcher according to the present invention. 2 is its mounting board, and the board 2 has a bearing cylinder 3 fixedly attached to the board 2.
A shaft 4 is rotatably supported via the shaft 4, and a disc body 5 is fixed to one end of the shaft 4 via a screw 6. The other end of the shaft protrudes toward the back side of the base plate 2, and the base of the firing rod 7 is fixed to the protrusion via a nut 8. An arm 9 is provided on the disk body 5 to protrude toward the outer circumference, and a pin 10 into which a roller 10' is loosely fitted is implanted at the tip of the arm 9. A cam 11 rotatably driven by a motor (not shown) provided with a speed reduction mechanism is provided so as to abut against the pin 10. Further, a ball-hitting force adjustment ring 13 having a fan-shaped gear 12 integrally formed on the outer periphery of the bearing tube 3 is rotatably and loosely fitted facing the disc body 5, and the ball-striking force adjustment ring 13 and the disc body A coil spring 14 is interposed between 5 and 5. One end of the coil spring 14 is engaged with a comb tooth portion 13' formed on the ball hitting force adjustment ring 13, and the other end is engaged with a small hole 5' formed in the disc body 5.

More specifically, the batting force adjustment ring 13 is provided with the comb teeth 13' extending in the circumferential direction and carved in a line, and engagement grooves dividing the comb teeth 13' into left and right. 32 is carved in an annular shape, and a locking link 33 of the coil spring 14 is fitted into the engagement groove 32. That is, one end of the coil spring 14 is bent toward the outer circumferential direction into a substantially L-shape as shown in FIGS. 1 to 4 to form a hook-shaped portion 14'.
The hook-shaped portion 14' is provided so as to surround the retaining ring 33.

Then, due to the elastic force of the coil spring 14 in the circumferential direction against the disc body 5, the disc body 5 is moved through the shaft 4.
The firing rod 7, which is interlocked with the firing rod, is always biased in the firing direction. Further, a coil-shaped balance spring 15 having a weaker elasticity than the coil spring 14 is interposed between the ball hitting force adjustment ring 13 and the base plate 2. One end of the balance spring 15 is locked to the base plate 2 via a screw 15', and the other end is locked to a small hole 13'' formed in the ball hitting force adjustment ring 13, and the other end is locked to a small hole 13'' formed in the ball hitting force adjustment ring 13. It is provided so as to bias the ball hitting force adjusting ring 13 in a direction opposite to the direction in which the restoring force of the coil spring 14 acts against the restoring force of the coil spring 14. 16 is attached to the front of the pachinko machine. is a trochanter that rotates the ball hitting force adjustment ring 13 in conjunction with the rotation operation of an operation handle (not shown) that is rotated;
The same trochanter 16 includes a lower rotating body 16a and a lower rotating body 1.
Upper rotating body 16 whose center portion is fitted into 6a
It is formed into two halves with b. Lower rotating body 1
6a is rotatably connected to the base plate 2 via a support shaft 17 protruding from its rear end, and a gear 18 that meshes with the sector-shaped gear 12 is integrally formed on its outer periphery. On the other hand, a plurality of engagement protrusions 20 that can be engaged with the operating handle are provided at the front end of the upper rotating body 16b, and a stopper 21 is provided protruding from the outer periphery of the upper rotating body 16b. The stopper 21 is provided so as to come into contact with a pin 22 protruding from the substrate 2. Also, trochanter 16
Sawtooth surfaces 23, 23 in which minute grooves and protrusions are radially carved along the radial direction are provided at the dividing portion between the lower rotary body 16a and the upper rotary body 16b, respectively. Further, the tip of the bolt 24 fixed to the lower rotating body 16a is provided to protrude into a concave portion 25 formed in the center of the upper rotating body 16b, and a backing plate 27 is supported on the tip via a nut 26. A compression spring 28 is interposed between the rear end surfaces of the concave portion 25 so that the sawtooth surfaces 23, 23 are normally held in an engaged state through the elastic force of the compression spring 28. The head 24' of the bolt 24 protrudes from the rear side of the board 2, and a suitable tool, for example a hexagonal wrench,
Alternatively, an engagement hole 29 for a screwdriver or the like is bored. In other drawings, 30 is a stopper that restricts the range of repetitive motion of the firing rod 7, and 31 is a rod that is linked to the firing rod 7 and sends the balls one by one to the firing rod 7 side.

Next, its effect will be explained. When the operating handle is rotated in FIG. 2, the motor is turned on, and the motor rotates the cam 11 counterclockwise in the state shown in FIG. is pin 10 of arm 9
By intermittent impact on the firing rod 7, a state is obtained in which the firing rod 7 is repeatedly driven. On the other hand, when the operating handle is rotated as described above, the trochanter 16 engaged with the operating handle is rotated clockwise, and the gear 18 provided on the trochanter 16 is also rotated in the same direction. Since the fan-shaped gear 12 provided in the hitting force adjustment ring 13 is meshed with the gear 18, the hitting force adjustment ring 13 rotates counterclockwise through the rotational force transmission action of the gear 18 to the fan-shaped gear 12. It will be rotated. By rotating the ball-hitting force adjustment ring 13 in this way, the coil spring 14, whose one end is locked to the ball-hitting force adjustment ring 13, is twisted in the circumferential direction and its elastic force is strengthened. Become. Therefore, the strength of the ball hitting force of the firing rod 7 can be adjusted by adjusting the amount of rotation of the ball hitting force adjusting ring 13 through the rotational operation of the operating handle as described above. Furthermore, when the ball-hitting force adjustment ring 13 is rotated to increase the elastic force of the coil spring 14 as described above, the ball-hitting force adjustment ring 13 is affected by the restoring force of the coil spring 14 in accordance with the amount of rotation. The reaction force will be applied to the ball hitting force adjusting ring 13 in a direction that resists the restoring force of the coil spring 14.
By providing the balance spring 15 that biases the ball, the balance spring 15 has the effect of offsetting and reducing the reaction force of the coil spring 14 acting on the ball hitting force adjustment ring 13. On the other hand, the trochanter 16, which is formed into two parts including the lower rotating body 16a and the upper rotating body 16b, has sawtooth surfaces 23, 23 provided on the divided parts that are engaged with each other through the elastic force of the spring 28. Because they are connected together, they are normally rotated together, but when adjusting the spring force of the coil spring 14, the upper rotating body 16b can be rotated by holding the operation handle in a fixed manner. If a suitable tool is inserted into the engagement hole 29 from the back side of the board 2 to forcibly rotate the lower rotating body 16a while the rotation is restricted, it will resist the elastic force of the spring 28. The upper rotating body 16b rises and the serrated surface 23,
23 is disengaged, and a state is obtained in which the lower rotary body 16a can be rotated in small increments by one engagement unit of the sawtooth, and when the rotation operation of the lower rotary body 16a is stopped, the upper rotary body 16b springs again. 28
It will be automatically engaged through the elastic force of.
Then, through the rotation operation as described above, the lower rotating body 1 is
By rotating 6a in either forward or reverse direction,
The spring force of the coil spring 14 can be adjusted by rotating the ball hitting force adjustment ring 13 in small increments through the fan-shaped gear 12 that is meshed with the gear 18 provided on the lower rotating body 16a.

The present invention has the above-mentioned configuration, and by connecting the trochanter and the ball striking force adjustment ring through a gear mechanism as described above, it solves the drawbacks of the conventional wire type. It is now possible to completely eliminate the inconvenience of the wire breaking,
The rotational force on the trochanter side can be reliably transmitted to the ball-hitting force adjustment ring, and its durability can be dramatically improved. In addition, a balance spring that resists the restoring force of the coil spring is provided in the ball hitting force adjustment ring, and the balance spring offsets and reduces the reaction force of the coil spring that acts on the ball hitting force adjustment ring, thereby making it easier to control the operating handle. It has become possible to perform the rotation operation smoothly with less force, and therefore, even if the handle is operated for a long time, the fatigue of the hands and fingers can be significantly reduced compared to the conventional method.
Furthermore, in the present invention, the trochanter is divided into an upper rotating body and a lower rotating body, and the gear provided on the lower rotating body is connected to the upper rotating body through the engagement action of the sawtooth surface formed on the divided portion. By rotating the coil spring in small increments, it has become possible to make fine adjustments to the spring force of the coil spring, which was difficult in the past.

Furthermore, in the present invention, a comb-teeth portion is carved along the circumferential direction on the ball-hitting force adjustment ring, and a hook-shaped portion formed at one end of the coil spring is engaged with the comb-teeth portion. On the other hand, an engagement groove is carved in an annular shape so as to divide the comb tooth portion into left and right sides, and a retaining ring is fitted into the engagement groove, and the ring forms one end of the coil spring. By preventing the key-shaped portion from falling off, it has become possible to effectively prevent the coil spring from falling off.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of the ball launcher according to the present invention, Fig. 2 is a front view thereof, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is a cross-sectional view taken along line B-B in Fig. 2. The sectional view and FIG. 5 are rear views. DESCRIPTION OF SYMBOLS 1... Ball launcher, 2... Board, 3... Bearing tube, 4... Shaft, 5... Disc body, 5'... Small hole, 6... Screw, 7... Launching rod, 8... Natsuto,
9...Arm, 10...Pin, 10'...Roller, 11...Cam, 12...Sector gear, 13...
Hitting force adjustment ring, 13'...comb teeth, 13''...small hole, 14...coil spring, 15...balance spring, 15'...screw, 16...trochanter, 16a...
Lower rotating body, 16b... Upper rotating body, 17... Support shaft, 18... Gear, 20... Engaging protrusion, 21...
...Stopper, 22...Pin, 23...Serrated surface,
24... Bolt, 24'... Head, 25... Recess, 26... Nut, 27... Backing plate, 28...
Spring, 29...Engagement hole, 30...Stopper, 3
1... Rod, 32... Engaging groove, 33... Retaining ring, 14'... Key shaped part.

Claims (1)

[Scope of utility model registration request] The shaft is pivotally supported by a bearing cylinder fixed to the mounting board, and a firing rod and a disk body are fixed to both ends of the shaft, and a ball striking force adjustment ring that faces the disk body and loosely fits into the bearing cylinder. In the ball launcher, the ball firing force adjustment ring is provided so as to rotate in conjunction with a trochanter connected to the operating handle, and a coil spring is interposed between the ball hitting force adjustment ring and the disk body. A comb-teeth portion is formed along the circumferential direction in the hitting force adjustment ring, and a hook-shaped portion formed by bending one end of the coil spring toward the outer circumference is engaged with the comb-teeth portion. , an engagement groove is carved in an annular shape so as to divide the comb tooth portion into left and right sides, and a retaining ring is fitted into the engagement groove, while the ball striking force adjustment ring has a more elastic force than the coil spring. A weak coiled balance spring is inserted, and the balance spring biases the coil spring in a direction that resists the restoring force of the coil spring, and the trochanter is divided into an upper rotating body and a lower rotating body. Both rotating bodies are biased in a direction in which sawtooth surfaces formed on their divided parts mesh with each other, and a gear fixed to the lower rotating body is meshed with a fan-shaped gear formed on the hitting force adjustment ring. ball launcher.