KR20020039126A - Shooting machine - Google Patents

Abstract

PURPOSE: A shooting apparatus is provided to uniformly and repeatedly shoot a ball at a predetermined constant speed, thus maximizing the convenience of shooting and the effect of practice. CONSTITUTION: The shooting apparatus comprised of a motor for shooting a ball, and a pair of wheels(10,12) rotated by the motor(30) is designed to shoot the ball by using the friction force between the wheels. A linear course is formed in a section from a ball input position to a ball shooting position, each wheel is disposed at both ends of the linear course, plural idle wheels(14) are provided, and a pair of timing belt(16) wrapping the wheels to transfer the ball is installed. The driving wheels are coupled with the motor by interposing plural gears engaged with each other for the transmission of the rotating force.

Description

Shooting machine

The present invention relates to a shooting device for firing a ball, and more particularly, to a shooting device capable of launching a uniform ball at a predetermined constant speed and maximizing convenience by mechanizing repetitive shooting.

There are various proposals for measuring by firing a ball or practicing in the sports field.

First, it is to be expected that the functional and practical fields describing the present invention include all ball sports fields.

Examples include golf, baseball, volleyball, soccer, handball, tennis, and so on.

In each of the cited ball games, the automatic (semi-automatic) shooting device has certain characteristics.

As a device for launching a ball in the field of ball sports, a known pitching machine for hitting a baseball is also proposed.

The structurally divided pitching device is known as follows.

The first is the throwing device which throws the ball by the operation of compressed air or the pressure spring in the cylinder. However, it is difficult to give a rotation to a ball, such as giving a spin to bend in a desired direction. In addition, high compressive force is required for high speed ball throwing.

Therefore, there is a drawback of having to enlarge the device, which is not used so much at present, and it is almost impossible to keep the speed of the ball constant.

The second is a device that throws a ball by the friction force between the tire and the ball by inserting the ball between two tires that rotate in opposite directions by the motor. This device is simple in structure and changes the degree of rotation of the two tires. It is widely used because it can vary the direction of the curve and can change the rotation of the ball by the rotational speed of the two tires, but the ball is engaged between the two tires. The ball is severely damaged by the momentary large friction at the point of contact, and the damage of the ball smooths the bumpy surface formed on the surface of the ball, reducing the speed of the ball's firing, and the direction of the ball's throw to the ball as it leaves the tire. It is very difficult to control the ball because As well as the difficult case of Dennis balls covered surface of hair is easily damaged.

The apparatus has a problem that it is difficult to use the ball for knocking baseball, which needs to throw a long distance at high speed.

The third is a ball throwing device using the stored energy of the cam and the spring, the arm of which is driven by an electric motor and through the cam on the axis of rotation the energy is stored by the spring and after the cam has passed the bottom dead center. The stored energy is transferred to rotate the arm. The ball to be thrown is received in a bowl-shaped ball receptacle.

The ball is thrown from the ball support part by centrifugal force and is blown at the pitch point in the tangential direction of the rotating source. Therefore, the mechanism of such a device is very simple and widely used. However, this apparatus has the following drawbacks.

Since the ball leaves the arm when it is rolled into the ball support part by the centrifugal force caused by the rotation of the arm, the rotation angle of the arm is severely affected by the acceleration of the arm, the strength of the spring and the frictional force of the ball support part. Therefore, it can not be adjusted accurately, the ball can not spin because the ball can not be thrown, the speed of the ball is limited by the size of the repulsive force of the compression spring, so the ball can not be thrown at high speed, and after the ball is thrown, There is a problem that it is difficult to use in any place outdoors because the device must be fixed to the ground.

The prior art is to move the ball to the firing position by the motor power and to fire with spring spring force at the firing position as in the Republic of Korea Patent Publication No. 99-52926, which is a structure that strikes with a spring force using a spring force It is known to practice the blow of the baseball while supplying the ball, and a manual proposal to remove the centrifugal force applied to the ball at a certain moment, such as patent publication 83-2031, and launch the ball in a constant trajectory is known.

The present invention devised to solve all the problems of the prior art as described above has the following object.

SUMMARY OF THE INVENTION The present invention provides a shooting device that automatically and repeatedly fires a ball at a constant speed so that the course and the curve are uniformly maintained.

The present invention is to provide a shooting device that can maximize the effect of the practice without the help of a person in a place requiring a repetitive toss of the ball.

The present invention is to provide a shooting device that can be used regardless of the type or material of the ball to prevent the wear of the ball.

The present invention further provides a golf ball shooting device for measuring the green speed of a golf course.

The present invention made to achieve the above object is to provide a moving path for launching the ball in a certain section of the straight path and the driving wheel is formed at one end in the movement path of the straight line and the driven wheel is provided at the other end, the predetermined interval between It is formed by combining a motor with a driving force by forming an idler wheel and forming a timing belt for enclosing these wheels and transporting the ball to form a pair of opposed pairs to accommodate the diameter of the ball. .

1 is a plan view showing a shooting device according to the present invention.

2 is a plan view showing a modified embodiment of the present invention.

Figure 3 is an excerpt showing a state of ball transfer of the present invention.

Figure 4 is a plan view showing another modified embodiment of the present invention.

5 is a cross-sectional state diagram as a configuration example to which the present invention is applied.

** Description of symbols for the main couple of drawings **

10, 18: drive wheel 12: driven wheel

12a: belt sprocket 14: idle wheel

15: tension control wheel 16: timing belt

17: tension regulator 18: shaft

20, 22: gear 24, 26: bevel gear

30: electric motor

Hereinafter, the technical spirit of the present invention will be described in detail with reference to the accompanying drawings.

1, the driving wheel 10 and the driven wheel 12 are formed to be spaced apart from each other so that a straight path is formed at a predetermined interval from the direction in which the ball is injected to launch the ball as shown in FIG. Comprising a plurality of idle wheels 14 in the section and the belt driving unit (1) formed by wrapping the wheels with a timing belt 16 spaced apart by the distance of the ball to the opposite configuration,

Gear 20 is coupled to the upper drive wheel 10 of the belt drive unit 1 by the shaft, and fixed to the motor 30 shaft to form a bevel gear 26 and the gear coupled to the bevel gear 24 22 is formed and engaged with the gear 20.

When the electric motor 30 is applied according to the present invention made as described above, the driving force is transmitted through the bevel gears 26 and 24 to the gears 22 and 20 while the driving wheel 10 is rotated so that the timing belt 16 can be rotated. ) Rotates.

The timing belt 16 of the opposing belt drive unit 1 rotates in a reverse direction to each other, and when the ball 40 flows in, the timing belt 16 moves the ball in a straight line and acts to fire toward the driving wheel 10.

On the other hand, the present invention is provided with a tension adjusting wheel 15 in the belt drive unit 1 to correct the relaxation of the timing belt 16, the shaft is coupled to the tension adjusting device 17 to be engaged with the inner peripheral surface of the timing belt. However, the tension control unit 17 is coupled to the shaft 18 is made by the elastic coupling so that the tension control wheel 15 can be turned outward relative to the shaft 18.

The tension adjustment is performed by a predetermined spring force, not shown, and thus the tension adjustment is continuously performed by adjusting the tension of the timing belt in which the tension adjustment wheel is extended.

In addition, the present invention can be achieved such that the distance between the opposing wheels in the direction of the driving wheel in which the ball is discharged from the driven wheel 12 into which the ball is introduced such that X1> diameter of the ball> X2> X3.

It is formed so that the ball has a slightly wider width than the ball so that the ball can be easily inserted between the timing belts on both sides, and the diameter of the ball from the second wheel where the ball is stably sandwiched between the belts on both sides. By adjusting it smaller, the ball is transported by the belt without slipping and firing.

This acts to drastically reduce the wear of the ball, to ensure the ball's straightness and to fire at a uniform speed.

The wheels 10, 12, and 14 engaged with the timing belt 16 for feeding the ball are formed in a failure shape in which the center portion except for the upper and lower engagement surfaces is formed so that the belt can be stretched and retracted by the ball. Bearing capacity is secured (see FIG. 3).

4 is a plan view showing another modified embodiment of the present invention.

Here, the configuration of the belt drive unit 1 is the same as described above.

Figure 4a is a modification of the path for transmitting the driving force of the electric motor 30 is provided by axially coupling the belt sprockets (10a, 12a) to the drive wheel 10 and the driven wheel 12 and gears on both sides of the belt sprocket. Is provided so that the driving belt 18 coupled to the motor shaft and the timing belt 16 opposite to the idle wheel 18a are synchronously rotated in the same direction.

On the other hand, Figure 4b is provided with the belt sprockets 10a, 12a axially coupled to the drive wheel 10 and the driven wheel 12, the belt sprocket 14a is also provided separately in each idle wheel 14 concentric shaft And a timing belt 16a having gears formed on both sides of the belt sprockets 10a, 12a, and 14a so as to oppose the driving wheel 18 and the idle wheel 18a coupled to the motor shaft. The timing belts 16 are made to rotate synchronously in the same direction.

Of course, the manner of staggering the timing belt 16a for transmitting the power can be made in a variety of ways, all of which can rotate the opposite belt drive unit 1 in the same firing direction (the direction of rotation of the wheel is synchronous). Anything is possible.

According to the modified embodiment as described above, in addition to the above-described action, since the belt driving is performed without the gear driving the wheel, the noise level is reduced.

Of course, the timing belt 16a also needs to adjust the tension, which will be understood without adding a detailed description by adding the wheel for adjusting the tension described above.

Looking at the application example as a shooting device for firing a golf ball by applying the technical idea of the present invention.

At the golf course, a green speed measurement operation is performed in which the speed of the ball is calculated and published according to the green state.

Looking at the method that has been used to measure the green speed is typically measured using a long rod-shaped steam meter provided with a groove to temporarily stop the golf ball. To raise the meta to achieve a certain angle of inclination, the ball rolled down and the ball was rolled on the green to measure the average value and to announce at green speed.

However, such a green speed measurement method has a problem in that the deviation is large because it appears differently according to the joke of the measurer who creates the inclination with the cloud according to the inclination.

Therefore, in the case of using the shooting apparatus to which the present invention is applied, accurate green speed can be measured.

That is, as shown in FIG. 5, the gear 50 forms a housing 50 with a constant enclosure, couples the electric motor 30 to the upper part of the housing, and transfers the power of the electric motor to the belt drive unit 1 on both sides in the middle portion. 20 and 22, the belt drive unit comprising the drive wheel 10, the idle wheel 14 and the driven wheel 12 arranged in a row, and the drive wheel 10 is axially coupled to the lower portion of the gear ( 1) is formed to be spaced apart from each other and provided with a passage 52 for supplying the ball 40 to the driven wheel 12 side from the outside, and to provide a launch port 54 in the opposite portion of the passage.

The electric motor 30 is capable of speed control and it is convenient to use while moving freely to be driven by a battery power source, in the case of fixed use may use a general AC power.

When applied to measure the green speed as described above, the firing speed is adjusted by adjusting the speed of the electric motor, and the ball is fired at a uniform speed every time by the firing speed set once.

The inventors measured the rate of firing of the ball and found that the deviation was extremely small and uniform every time.

This uniform firing speed is obtained by a belt drive formed side by side for a certain period.

When the toss is maintained while maintaining a constant elevation, such as tennis or baseball, the present invention can be used while maintaining the launching opening at a predetermined angle, so that it can be used while firing at a constant speed.

As a result, the wear of the ball is minimized and the ball can be repeatedly fired at a set speed. The use of the ball can be varied and the distance between the wheels can be changed depending on the ball used.

As described in detail above, the present invention automatically and repeatedly fires the ball at a constant speed, thus maintaining a uniform course and curve, and eliminating manpower at a place requiring a repetitive toss of the effect of practice. It has the effect of maximizing the accuracy of the ball, and it can be used regardless of the type or material of the ball to prevent the wear of the ball, and the ball can be repeatedly fired at a constant speed to measure the green speed of the golf course. It is an invention having various excellent effects, such as being able to calculate speed.

Claims (5)

A shooting device in which a ball is fired by a friction force between the wheels, including a pair of wheels rotating by an electric motor and motor power to fire the ball, To prepare a moving path for launching the ball in a certain straight line path, The driving wheel is formed at one end of the straight path and the driven wheel is provided at the other end, and a predetermined idle wheel is formed in the interval between the two to form a timing belt for enclosing the wheels and transferring the ball to accommodate the diameter of the ball. Forming in opposing pairs, Shooting device, characterized in that the drive wheel is coupled by a driving force to the motor engaged with the gear. The method of claim 1, wherein a straight path is formed in a predetermined section in a direction from the direction in which the ball is injected to launch the ball and is formed by separating the driving wheel 10 and the driven wheel 12 at both ends of the straight section. And a plurality of idle wheels 14 in the intervals between the belt drive units 1 surrounding the wheels with a timing belt 16 to be spaced apart by a ball spacing therebetween, Gear 20 is coupled to the upper drive wheel 10 of the belt drive unit 1 by the shaft, and fixed to the motor 30 shaft to form a bevel gear 26 and the gear coupled to the bevel gear 24 (22) forming and engaging with the gear (20), Bevel gears (26, 24) for transmitting the power of the electric motor 30 and a pair of spur gears (22, 20) are meshed to transmit rotational power to the drive wheel 10, Shooting device, characterized in that the timing belt 16 of the opposite belt drive unit 1 rotates in the opposite direction to each other and when the ball 40 is introduced, the ball moves in the direction of the driving wheel 10 while transferring the ball in a straight line. . The method of claim 2, wherein the belt driving unit (1) is provided with a tension adjusting wheel 15, the shaft is coupled to the tension adjusting device 17 and coupled to be engaged with the inner peripheral surface of the timing belt, the tension adjusting device 17 is a shaft (18) Shooting device, characterized in that the coupling is made to be shot so that the tension adjustment wheel (15) is pivotable outwardly relative to the shaft (18). The shooting device according to any one of claims 1 to 3, wherein the distance between the opposing wheels in the direction of the driving wheel from which the ball is discharged is driven such that X1> diameter of the ball> X2> X3. The timing belt 16a according to claim 2 or 3, wherein the belt sprockets 10a and 12a are coaxially coupled to the driving wheel 10 and the driven wheel 12, and a gear is formed on both sides of the belt sprocket. Shooting device, characterized in that the drive belt (18) coupled to the rotating shaft of the electric motor (30) and the timing belt (16) opposite to the idle wheel (18a) is made to rotate in the same direction mutually.