JP7508087B2 - Ball launcher - Google Patents

Description

The present invention relates to a ball launching device that uses air pressure and is used in practicing ball games such as baseball and tennis.

A ball launching device that automatically launches baseballs or tennis balls is used in baseball batting practice or tennis stroke practice. A ball launching device used in baseball practice is called a pitching machine or batting machine. Ball launching devices such as pitching machines and batting machines are used by practitioners in baseball batting practice or tennis stroke practice.

Examples of such ball launching devices include a device that launches a ball by rotating an arm with a ball on the tip (see, for example, Patent Document 1), and a device that passes the ball between a pair of closely spaced rollers and launches the ball by rotating a pair or three rollers (see, for example, Patent Document 2).

In this specification, the device disclosed in Patent Document 1 that shoots a ball by rotating an arm is referred to as an "arm-type launching device." In addition, in this specification, the device disclosed in Patent Document 2 that shoots a ball by rotating a pair of rollers is referred to as a "roller-type launching device."

The straight ball launched from the ball launching device travels with an axis of rotation that is nearly perpendicular to the direction of launch (direction of travel) of the ball. In other words, it travels while backspinning with an axis of rotation perpendicular to the direction of travel. If the launched ball did not have any rotation, it would drop or travel in a strange trajectory.

In other words, the ball launching device is required to impart sufficient spin to the ball when it is launched. If the ball is launched without imparting this spin, not only will it be impossible to launch a basic straight ball, but the ball will also arrive on an indefinite trajectory, making it unsuitable for baseball batting practice, etc.

This is true not only for baseball, but also for ball games such as tennis. If the ball is not given enough spin when it is shot, the flight and trajectory of the ball will be unstable, making it unsuitable for practice. In particular, for balls such as straight balls, in order to shoot a ball that follows an appropriate and consistent trajectory each time it is shot, it is necessary to give it a sufficient number of spins to keep it constant.

In an arm-type launching device, as typified by Patent Document 1, a ball is placed on a tray at the end of an arm, and the ball is launched by swinging the arm down. The ball is given rotation only by friction when the arm swings down on the tray. This means that the number of rotations is easily insufficient. Of course, the number of rotations cannot be controlled. Also, if the ball or tray is wet due to rain or other reasons, there is a problem that the number of rotations given to the ball is insufficient.

In roller-type launchers, as typified by Patent Document 2, a spin is imparted to the ball as it is sent out by two opposing rollers. However, when it is sent out by two rollers, the spins can cancel each other out, and it is possible that the ball is not given a sufficient number of spins. In order to change the number of spins, adjustments must be made each time. Also, if the ball or rollers get wet due to rain or other reasons, the ball may slip when sent out by the rollers, and it may not be possible to impart a sufficient number of spins.

Furthermore, with arm- or roller-type ball launchers, the ball is given rotation just by contact with the arm or roller when it is thrown. This means that the number of rotations imparted is inevitably insufficient, and if the ball is launched at a slow or fast speed, the imbalance between the ball's speed and number of rotations can cause the trajectory of the launched ball to become unstable.

In addition, arm-type and roller-type ball launchers have other problems, such as the need to make the devices larger and the need to select locations where they can be used. There are also problems with expanding the variety of ball speeds, etc.

For this reason, technology has been proposed for air pressure ball launching devices that launch balls using air pressure, rather than using arms or rollers (see, for example, Patent Documents 3, 4, and 5).

By using air pressure to launch the ball, it is possible to diversify the launch speed, make the device more compact, and ensure that it can be used in a wider range of locations.

Japanese Patent Application Laid-Open No. 9-38266 JP 2000-107339 A Japanese Utility Model Application Publication No. 1-77784 JP 2003-70951 A JP 2007-528764 A

Patent Document 3 discloses a pitching machine equipped with a ball rotation means that applies friction to the ball by bringing mountain-shaped protrusions into contact with the surface of the ball as it moves through a tube under the pressure of high-pressure air. Patent Document 4 simulates the friction that a human pitcher applies to the ball with two fingers by bringing two protrusions into contact with part of the surface of the ball as it moves through the tube. By this simulated reproduction, the pitching machine disclosed in Patent Document 4 is able to impart rotation to the ball.

Patent document 3 describes a technology in which friction is applied to the ball by the protrusions when air pressure is applied in the launch section and the ball moves inside the cylinder. This friction imparts rotation to the ball.

However, when the ball launching device is used outdoors, the ball may get wet, or at least a part of the ball launching device may get wet. When the pitching machine is used in a batting cage or the like, the balls that are thrown or hit move through an open space, and so the balls may get wet in rainy weather. Of course, the same applies when the machine is used outdoors, such as on a field.

When such a wet ball is thrown into the pitching machine, it comes into contact with the protrusions while wet. When the ball comes into contact with the protrusions while wet, there is a problem that sufficient friction cannot be provided, resulting in insufficient spin speed.

Also, when the launch speed is low (low speeds may be used at batting centers, etc.), there is a problem that friction with the protrusions is insufficient, causing the ball to slip and resulting in insufficient rotation speed.

In addition, the protrusions come into contact with the ball every time it is hit. As a result, the protrusions gradually wear down and become deformed. As a result of this deterioration of the protrusions, the number of spins imparted to the ball can also be insufficient or unstable.

As mentioned above, if the ball launched from the ball launching device is not given a sufficient number of rotations, the ball may not be launched as the appropriate type of ball, or it may be launched on an unstable trajectory.

Patent document 4 discloses a ball launcher that includes a launch tube 13 made of a straight cylindrical tube with one opening serving as a pressurized air intake and the other opening serving as a ball launch port, and a roller 20 protruding from the inner wall of the launch tube 13, and that uses compressed air to move the ball toward the opening, and by bringing the roller 20 into contact with one side of the ball moving inside the launch tube 13, spins the ball and launches the spun ball without significantly deforming its shape.

Patent Document 4 also applies friction to a part of the surface of the ball inside the tube through which the ball moves. This friction can impart rotation to the ball when it is shot.
However, Patent Document 4 also has the same problems as Patent Document 3.

Patent document 5 relates to a structure 12 and method for spinning a seamed ball 26 before it is thrown from a ball throwing device 10. The structure can simulate a ball being thrown in a sport such as baseball. The structure includes at least one pair of opposing ball supports 28A, 28B that first place a loaded ball in a predetermined position and then impart a predetermined amount of spin to the ball before it is launched from the structure.

Patent document 5 discloses that the ball is launched by rotating the ball itself with a support member, rather than by contact with a protrusion inside the tube.

However, Patent Document 5 does not disclose what mechanism or method is used to launch a spinning ball. In addition, because the ball is held and rotated by support members from four directions, there are problems with the processing time required from this state until the ball can be launched, and there is also the problem that the rotation of the ball is greatly reduced when it is launched.

In addition, the entire process from when the ball is supplied to the support members to when it is launched by the launch tube is unclear, which causes the time required from setting the ball to spinning it and then launching it to be too long. Also, while the premise is that the ball is held by the four support members, the balls used in batting practice and the like have slight differences in diameter and shape due to manufacturing variations and frequency of use. For this reason, it is difficult to reliably hold each of the balls, which have different diameters and shapes, with the four rod-shaped support members.

In an attempt to solve the problem of the ball being difficult to grip, if the support members are set one by one and gripped, it takes time to set the ball on the support members. In addition, it is not possible to set the ball in a position that is aligned with the center of the launch tube, which causes the ball's launch trajectory to become unstable.

In particular, according to the disclosure of Patent Document 5, the ball is thrown from the tip of the launch tube and set on a support member at the rear end. With this structure, the ball cannot be set if the launch tube is horizontal or tilted forward. To avoid this, if the launch tube is turned forward and upward every time a ball is set, an additional operation is required to change the angle of the launch tube relative to the plane when launching the ball. If this is done manually, there is a problem that an assistant worker is required when practicing using a ball launching device. If it is made automatic, this leads to problems such as a complicated mechanism and an increase in the number of failure factors, making it difficult to use. Of course, the launch interval is also long, making it unsuitable for practice. This can also cause customer dissatisfaction, especially at batting centers.

As described above, in ball launching devices of the prior art, rotation is imparted by contact with a contact member inside the launch tube through which the ball moves after launch. However, as mentioned above, there are problems with insufficient rotation when the ball is wet, when the ball is launched at a low speed, or when the contact member has deteriorated. Alternatively, when rotating the ball with a support member as in Patent Document 5, there are problems with delays in the overall operation, complicated mechanisms, and inconvenience in actual use.

The objective of the present invention is to provide a ball launching device that mechanically rotates a ball after it is inserted into a launch tube, and then maintains the rotating state while launching the ball using air pressure.

In view of the above problems, the present invention provides a ball launching device that includes a launch tube that moves a ball when the ball is launched;
a supply port provided at a rear end side of the launch tube and supplying balls to the launch tube;
a ball holder provided inside the launch tube and configured to receive the balls supplied from the supply port;
a first rotor extending from a first side of the ball set in the ball holder and contacting a first side surface of the ball;
a second rotor that comes out from a second side of the ball set in the ball holder and contacts a second side surface of the ball to grip the ball at the first side surface and the second side surface together with the first rotor;
A rotation drive unit that rotates at least one of the first rotor and the second rotor;
An angle drive unit that rotates the angle of the ball holder;
an air pressure applying unit that applies air pressure to the ball rotating inside the ball holder;
a separation control unit that separates the ball from the grip of the first rotor and the second rotor immediately before the air pressure is applied by the air pressure applying unit;
A control unit that controls everything from supplying the ball to firing it;
The first side and the second side are opposite directions,
The first side surface is located at a position corresponding to the first side, and the second side surface is located at a position corresponding to the second side,
When the first rotor and the second rotor approach and come into contact with the ball set in the ball holder, the first rotor and the second rotor grip the ball from the first side and the second side of the ball and rotate it,
The separation control unit separates the first rotor and the second rotor from the ball just before the air pressure applying unit applies air pressure to the ball, thereby enabling the air pressure applying unit to apply air pressure while the ball is rotating.

In the ball launching device of the present invention, the ball is delivered to the launch position from the top of the launch tube and set in the ball holder. In this set state, the ball is rotated. Since the ball is rotated mechanically, it solves the problems that arise when using contact members. In addition, the number of rotations and the forward and backward rotation directions can be automatically controlled in various ways.

In this controlled rotation state, air pressure is applied and the ball is launched. This allows the ball to be launched with a sufficient number of rotations. In particular, since the ball is launched with a controlled number of rotations, it is possible to reproduce a certain type of ball and trajectory.

In addition, since there is no need for a contact member inside the launch tube to impart rotation, the launch tube can be made shorter accordingly.

FIG. 1 is a side view of a prior art air-pressure ball launching device. 1 is a side view of a ball launching device according to a first embodiment of the present invention. 1 is a schematic diagram showing the inside of a ball installation section of a ball launching device in accordance with a first embodiment of the present invention, as viewed from above. FIG. 2 is a schematic diagram of the periphery of a ball holder in the first embodiment of the present invention. FIG. 2 is a schematic diagram of the periphery of a ball holder in the first embodiment of the present invention. FIG. 2 is a schematic diagram of the periphery of a ball holder in the first embodiment of the present invention. FIG. 1 is an explanatory diagram showing a part of a ball launching device according to a first embodiment of the present invention as viewed from above; FIG. 2 is a front view of the launch tube according to the first embodiment of the present invention. FIG. 2 is a side view of the compressed air tank and its surroundings in the first embodiment of the present invention. FIG. 11 is a side view of a ball launching device according to a second embodiment of the present invention.

The ball launching device according to a first aspect of the present invention includes a launching tube that moves a ball when the ball is launched,
a supply port provided at a rear end side of the launch tube and supplying balls to the launch tube;
a ball holder provided inside the launch tube and configured to receive the balls supplied from the supply port;
a first rotor extending from a first side of the ball set in the ball holder and contacting a first side surface of the ball;
a second rotor that comes out from a second side of the ball set in the ball holder and contacts a second side surface of the ball to grip the ball at the first side surface and the second side surface together with the first rotor;
A rotation drive unit that rotates at least one of the first rotor and the second rotor;
An angle drive unit that rotates the ball holder;
an air pressure applying unit that applies air pressure to the ball rotating inside the ball holder;
a separation control unit that separates the ball from the grip of the first rotor and the second rotor immediately before the air pressure is applied by the air pressure applying unit;
A control unit that controls everything from supplying the ball to firing it;
The first side and the second side are opposite directions,
The first side surface is located at a position corresponding to the first side, and the second side surface is located at a position corresponding to the second side,
When the first rotor and the second rotor both approach and come into contact with the ball set in the ball holder, the first rotor and the second rotor grip the ball from the first side and the second side of the ball and rotate it,
The opening control unit separates the first rotor and the second rotor from the ball just before the air pressure applying unit applies air pressure to the ball, thereby enabling the air pressure applying unit to apply air pressure while the ball is rotating.

This configuration allows the ball to be launched with the required number of rotations without being affected by the internal or external environment.

The ball launching device according to the second aspect of the present invention, in addition to the features of the first aspect, is a ball launching device that launches a ball using air pressure applied by an air pressure applying section.

This configuration allows for the ball to be launched with a stable trajectory by launching the ball with rotation, in addition to the accuracy of launching with air pressure.

In the ball launching device according to the third aspect of the present invention, in addition to the first or second aspect, the ball holder is provided at a position corresponding to the position of the supply port and the position where air pressure is applied by the air pressure applying section.

With this configuration, the balls supplied from the supply port are set directly into the ball holder.

In a ball launching device according to a fourth aspect of the present invention, in addition to the third aspect, the ball holder has a pair of openings in opposing directions,
When the balls are supplied from the supply port, the opening faces upward and communicates with the supply port,
When air pressure is applied from the air pressure applying portion, each of the pair of openings faces the ejection port of the launch tube and the air pressure applying portion.

With this configuration, the ball holder can receive and set balls from the supply port, rotate them using the rotor, and fire them using air pressure.

In the ball launching device according to the fifth aspect of the present invention, in addition to the fourth aspect, the angle drive unit rotates the ball holder while the ball is rotating and before air pressure is applied to the ball, so that each of the pair of openings faces the launch port and the air pressure applying unit.

With this configuration, the air pressure applying section can apply air pressure to the ball to launch it.

In a sixth aspect of the present invention, in addition to the fifth aspect, the air pressure applying unit applies air pressure to the ball from one of the openings;
The ball, to which air pressure is applied, travels through the launch tube from the other opening and is launched from the ejection port.

This configuration allows a ball to be launched that has a rotating state. Because it has a rotating state, the ball can be launched with a stable trajectory.

In the ball launching device according to the seventh aspect of the present invention, in addition to any one of the first to sixth aspects, both the first rotor and the second rotor rotate to rotate the ball being held.

This configuration ensures that the ball can be rotated mechanically.

In the ball launching device according to the eighth aspect of the present invention, in addition to any one of the first to seventh aspects, the rotation drive unit can change the rotation speed of the ball through the first rotor and the second rotor.

This configuration allows the ball to be launched with a stable trajectory and optimal rotation speed depending on the type of ball, speed, pitch type, external environment, etc.

In the ball launching device according to the ninth aspect of the present invention, in addition to any one of the first to eighth aspects, the rotation drive unit is capable of changing the rotation direction of the ball through the first rotor and the second rotor.

This configuration also makes it possible to change the type of ball by changing the direction of rotation.

In the ball launching device according to the tenth aspect of the present invention, in addition to the ninth aspect, the rotation of the ball by the first rotor and the second rotor includes rotation about an axis of rotation that is approximately perpendicular to the direction in which the ball is launched.

This configuration allows the ball to be launched with a very stable trajectory.

In a ball launching device according to an eleventh aspect of the present invention, in addition to any one of the first to tenth aspects, the control unit controls the timing of the air pressure application by the air pressure application unit and the separation timing by the separation control unit;
The control unit controls the separation in the separation control unit, using a timing that is earlier by a predetermined time period linked to the air application timing as the separation timing.

This configuration allows the ball to be launched in a spinning state.

The following describes an embodiment of the present invention with reference to the drawings.

(Analysis by the inventor)
1 is a side view of a ball launching device using air pressure in the prior art. The ball launching device 200 includes a launch tube 201, a compressed air tank 202, a friction imparting member 203, a housing, a support, and the like. A ball 100 is placed at a predetermined position inside the launch tube 201. Air pressure is applied from the compressed air tank 202 to the placed ball 100. As a result of this application, the ball 100 moves inside the launch tube 201 and is launched from the launch tube 201 to the outside.

At this time, the ball 100 comes into contact with the friction imparting member 203 attached inside the launch tube 201. This contact imparts rotation to the ball 100. This rotation allows the launched ball 100 to be launched with an appropriate trajectory. If no rotation is imparted or if the rotation is insufficient, the ball 100 will fly on an unstable trajectory regardless of the speed. In contrast, if rotation is imparted, the ball 100 will fly along a stable trajectory.

However, the inventor analyzed this type of ball launching device of the prior art and came to identify the following unresolved problems:

(Problem 1) If the ball is wet, the friction imparting member cannot impart sufficient rotation to the ball.
The ball launching device 200 is often used in semi-outdoor locations such as batting centers, or outdoors such as on a field. In batting centers, the ball launching device 200 itself may be covered by a roof or the like, but the ball itself flies in an area not covered by a roof (whether it is the flight of a launched ball or the flight of a hit ball). At this time, the ball gets wet from rain or the like. Or, when the ball is retrieved, it gets wet directly or indirectly from rain or the like.

In this way, it is possible that a ball with a wet surface may be placed on the ball launching device 200.

When a ball with a wet surface moves inside the launch tube 201 and comes into contact with the friction imparting member 203, the frictional force is reduced. This reduced frictional force results in insufficient rotation being imparted to the ball 100. This insufficient rotation can cause the trajectory of the ball 100 to become unstable. In addition, when the wet ball 100 comes into contact with the friction imparting member 203, the friction imparting member 203 can also become wet. As a result, the next ball 100 launched will also not be imparted with enough rotation, and will be launched with an unstable trajectory.

As such, depending on the characteristics of the location where the ball launching device 200 is used, the ball 100 and the friction imparting member 203 often get wet due to rain or the like. This often results in the friction imparting member 203 being insufficient to impart rotation to the ball 100. As a result, it can be difficult to reproduce trajectory stabilization.

(Problem 2) Problems with launching a ball at a low speed The ball launching device 200 is used at batting centers and in ball game practice. In such cases, the ball 100 launched by the ball launching device 200 may need to be launched at a low speed. In batting centers and baseball practice, a ball speed of about 60 km/h to 80 km/h is used as a low speed.

When launched at such a low speed, the contact pressure when the ball 100 moving through the launch tube 201 comes into contact with the friction imparting portion 203 is low. When the contact pressure is low, the spin imparted to the ball 100 is naturally weaker. When the spin imparted is weak and the number of rotations of the ball 100 is insufficient, the trajectory of the launched ball 100 becomes unstable. Even at a low speed, the trajectory of the ball 100 as a straight ball or other type of pitch is required to be stable. However, at low speeds, there is a problem in that the stability of this trajectory is insufficient.

(Problem 3) Problem of Deterioration of Friction Imparting Member The friction imparting member 203 comes into contact with the ball 100 when the ball launching device 200 launches the ball 100. Inside the launch tube 201, the ball 100 moves at high speed, and the friction imparting member 203 deteriorates with each contact. This is because the surface is scraped and worn. As the friction imparting member 203 deteriorates, the frictional force that can be imparted to the ball 100 when it moves through the launch tube 201 weakens, and the rotation imparted to the ball becomes weaker.

As mentioned above, if the spin is weakened, the number of rotations and the rotational force of the ball 100 that is launched will decrease, which can cause the trajectory of the ball 100 to become unstable.

To prevent this, it would be necessary to frequently replace the friction imparting member 203, but this would result in increased costs.

In addition to these, friction imparting member 203 and ball 100 must be in sufficient contact when moving through launch tube 201. For this reason, friction imparting member 203 must have a certain length, and the length of launch tube 201 corresponding to that length must also be long. As a result, the overall length of launch tube 201 must be long, which leads to the problem of the entire ball launching device 200 becoming larger. There is also the problem that the contact between friction imparting member 203 and ball 100 reduces the accuracy of the trajectory direction of launched ball 100.

As a result of this analysis, the inventor arrived at the present invention.

(Overall Overview)

Figure 2 is a side view of the ball launching device in the first embodiment of the present invention. Figure 3 is a schematic diagram of the inside of the ball installation section of the ball launching device in the first embodiment of the present invention, as seen from above.

The ball launching device 1 comprises a launch tube 2, a supply port 3, a ball holder 50, a first rotor 51, a second rotor 52, a rotation drive unit 6, an angle drive unit 7, a separation control unit 8, a control unit 9, and an air pressure applying unit 41. In addition, a ball installation unit 5 is provided as an area where a ball 100 is placed from the supply port 3 and rotated. In addition, a base 11 that supports the entire device, and a compressed air tank 4 that applies air pressure to the ball 100 are provided.

The ball 100 is supplied to the ball placement section 5 through the supply port 3 provided in the ball placement section 5, and placed in the ball holder 3 inside the ball placement section 5. Each side of the ball 100 set in the ball holder 3 is gripped by the first rotor 51 and the second rotor 52. Gripped by the first rotor 51 and the second rotor 52, the ball 100 rotates in a direction along the traveling direction (it rotates around the axis of rotation that intersects the traveling direction and is formed by the first rotor 51 and the second rotor 52).

This rotation ensures that the ball is rotated mechanically, rather than by a friction-imparting member as in the prior art. When the number of rotations is sufficient, the ball holder 3 rotates while the rotation continues, and the ball 100 faces the direction of launch from the launch tube 2 (the angle rotation unit 7 rotates the ball holder 3). In this state, the control unit 9 sends instructions to the compressed air tank 4 and the separation control unit 8, which separates the first rotor 51 and second rotor 52 that are holding the ball 100 from the ball 100, and also applies air pressure from the compressed air tank 4 to the back of the ball 100 (the side opposite the launch outlet 21 of the launch tube 2).

By applying this pressure, air pressure for launching is applied to the ball 100, which is maintaining a rotating state. As a result, the ball 100 is launched from the launch tube 2 in a rotating state. In other words, the ball 100 is launched in a rotating state. As a result, the ball launching device 1 can launch the ball 100 with a stable trajectory. Unlike conventional technology, since rotation is not imparted using a friction imparting member, it solves problems such as insufficient rotation when the ball 100 is wet due to rain, insufficient rotation due to deterioration of the friction imparting member, replacement costs, and insufficient rotation when launched at a low speed. By solving these problems, the trajectory of the launched ball 100 can be stabilized according to the type of pitch and the speed.

The launch tube 2 moves the ball 100 when it is launched. The launch tube 2 is the main body that accelerates the speed of the ball 100 and launches it. Inside the launch tube 2, the ball 100 moves due to the application of air pressure, and is launched from the launch port 21. As the ball 100 moves inside the launch tube 2, the ball 100 is launched with a trajectory.

The ball mounting section 5 is the section where the ball 100 is mounted, and where the ball 100 rotates and air pressure is applied. The ball mounting section 5 is in communication with the launch tube 2. The ball mounting section 5 may be combined with the launch tube 2 by assembly. Alternatively, it may be an integrated structure. The supply port 3 is provided in the ball mounting section 5, and supplies the ball 100 to the launch tube 2 (i.e., the ball mounting section 5). There may be various supply methods, but it is sufficient that the ball is supplied by free fall.

In addition, when the ball 100 is placed on the ball placement section 5, it is also preferable that the ball 100 is sandwiched and fixed by a seal ring 55 as shown in FIG. 2. This is because it is possible to prevent air from leaking around the ball 100 when air pressure is applied to the ball 100, which would cause insufficient air pressure to be applied to the ball 100.

The ball holder 50 is provided inside the ball placement section 5. The ball holder 50 is connected to the supply port 3 (not limited to being physically connected), and receives the ball 100 supplied from the supply port 3. In other words, the ball 100 supplied from the supply port 3 is placed (set) in the ball holder 50. Figure 3 shows the state in which the ball 100 is set in the ball holder 50.

The first rotor 51 can come out from the first side, which is one side of the ball 100 set in the ball holder 50, and contact the first side surface of the ball 100. The first rotor 51 can move in the direction of arrow B in FIG. 3, and when the ball 100 is set in the ball holder 50, the first rotor 51 moves in the direction toward the ball 100. This movement causes the first rotor 51 to come into contact with the first side surface of the ball 100. FIG. 3 shows the state in which the first rotor 51 is in contact with the first side surface, which is one side surface of the ball 100.

The second rotor 52 is provided on the opposite side of the first rotor 51 with the ball 100 in between. The second rotor 52 can contact the second side, which is the side of the ball 100 opposite the first side. As shown by arrow C in FIG. 3, the second rotor 52 can move relative to the ball 100. When the ball 100 is set in the ball holder 50, the second rotor 52 moves toward the second side of the ball 100. As a result of the movement, the second rotor 52 comes into contact with the second side, which is the other side of the ball 100. FIG. 3 shows the state in which the second rotor 52 is in contact with the second side of the ball 100.

That is, as shown in FIG. 3, the first rotor 51 and the second rotor 52 grip the ball 100 from both sides. The first rotor 51 and the second rotor 52 are paired opposite directions, so the first side and the second side are paired opposite directions. The first side is a position corresponding to the first side to which the first rotor 51 approaches to contact the ball 100. The second side is a position corresponding to the second side to which the second rotor 52 approaches to contact the ball 100.

The rotation drive unit 6 rotates at least one of the first rotor 51 and the second rotor 52. Since at least one of them is rotated, only the first rotor 51 or only the second rotor 52 may be rotated, or both may be rotated. Furthermore, when at least one of the first rotor 51 and the second rotor 52 rotates, the paired rotor also rotates via the balls 100. In other words, both the first rotor 51 and the second rotor 52 rotate whether only one rotates or both rotate.

By the rotation of both, the ball 100 rotates based on the rotation axis formed by the first rotor 51 and the second rotor 52 gripping the ball 100. In Fig. 2 and Fig. 3, the first rotor 51 and the second rotor 52 grip the ball 100 from the side based on the extension direction of the launch tube 2. That is, in Fig. 2 and Fig. 3, the direction approximately perpendicular to the extension direction of the launch tube 2 becomes the rotation axis. The ball 100 rotates on this rotation axis, so it rotates in the direction of arrow A shown in Fig. 2 and Fig. 3. Alternatively, it may rotate in the opposite direction to arrow A (arrow B). In this way, the first rotor 51 and the second rotor 52 grip and rotate the ball 100 from the first side and the second side of the ball 100.

The first rotor 51 and the second rotor 52 are rotated by the same drive unit, the rotation drive unit 6. At this time, the link mechanism of the rotation drive unit 6 simultaneously grasps the first rotor 51 and the second rotor 52 and further separates them, so that the ball 100 can always rotate at the center position. In particular, even if there is variation in the diameter of the ball 100, the ball 100 can be rotated at a center aligned with the central axis of the launch tube 2. By aligning this center of rotation with the central axis of the launch tube 2, the launched ball 100 can be prevented from contacting or colliding with the inner wall of the launch tube 2.

In FIG. 3, the control unit 9 and other elements are shown in a schematic manner to explain the elements of the ball launching device 100. The arrangement of the elements shown here is for the purpose of understanding, and does not necessarily represent the positions in which the elements are actually arranged in the ball launching device 100.

At this time, the ball holder 50 detects that the ball 100 has been set. This can be detected by using various sensors such as a contact sensor or an optical sensor (an optical sensor or the like determines and detects when the ball 100 is supplied from the supply port 3). The detection result is output to the control unit 9. In response to this detection result, the control unit 9 controls the rotation drive unit 6 to rotate at least one of the first rotor 51 and the second rotor 52 by the rotation drive unit 6.

The air pressure applying unit 41 applies air pressure to the ball 100 using compressed air from the compressed air tank 4. At this time, the ball holder 50 is also physically present on the back side of the ball 100. Therefore, in this state, the air pressure applying unit 41 cannot apply air pressure to the back side of the ball 100. This is because the air pressure applying unit 41 needs to apply air pressure to the back side of the ball 100 in order to launch the ball 100 from the launch tube 2.

Figure 4 is a schematic diagram of the area around the ball holder in embodiment 1 of the present invention. Figure 5 is a schematic diagram of the area around the ball holder in embodiment 1 of the present invention. Figure 6 is a schematic diagram of the area around the ball holder in embodiment 1 of the present invention. Unlike Figure 3, Figures 4 to 6 show elements in an assumed arrangement as the actual arrangement of the ball launching device 1. Although the control unit 9 shown in Figure 3 is provided, it is omitted in order to explain the actual operation.

At the stage shown in FIG. 4, as described above, the first rotor 51 and the second rotor 52 are rotating the ball 100 in the direction of arrow A by the rotation drive unit 6. In other words, the ball 100 is rotating in the direction of arrow A (it may also rotate in the opposite direction as described above). At this time, a part of the ball holder 50 is on the back side of the ball 100, facing the air pressure applying unit 41.

After the state shown in FIG. 4, the state shown in FIG. 5 is reached. In FIG. 5, the angle drive unit 7 rotates the ball holder 50. The ball holder 50 receives a supply of balls 100 from the supply port 3 located above. Because of this state, while the ball 100 is being rotated, part of the ball holder 50 blocks the back of the ball 100 as shown in FIG. 4. When the angle drive unit 7 rotates the ball holder 50, the part blocking the back is no longer blocking the back, and the ball is released. FIG. 5 shows the state in which the ball holder 50 has rotated and the back of the ball 100 is released. At the same time, the supply port 3 is closed by the ball holder 50.

When released, the air pressure applying unit 41 is able to apply air pressure to the back of the ball 100 in order to launch the ball 100. The control unit 9 controls the angle driving unit 7 to rotate the ball holder 50.

Next, the state shown in FIG. 6 is reached. FIG. 6 shows the state in which the separation control unit 8 has separated the first rotor 51 and the second rotor 52 from the first side and the second side of the ball 100, respectively.

The control unit 9 outputs an instruction signal to the separation control unit 8. Under control of this instruction signal, the separation control unit 8 separates the first rotor 51 from the first side of the ball 100 that it is holding. Similarly, the separation control unit 8 separates the second rotor 52 from the second side of the ball 100 that it is holding. The separation of the first rotor 51 and the second rotor 52 from contact with the ball 100 only needs to be performed at the same timing. Since they are operated by the same separation control unit 8, the first rotor 51 and the second rotor 52 separate from the ball 100 at the same time.

In this state, the control unit 9 controls the air pressure applying unit 41. The controlled air pressure applying unit 41 applies air pressure to the back surface of the ball 100. At this time, the air pressure applying unit 41 applies air pressure immediately after the timing at which the first rotor 51 and the second rotor 52 separate. Therefore, at the moment that air pressure is applied, the ball 100 is still maintaining a rotating state. In other words, the air pressure applying unit 41 can apply air pressure to the ball 100 while the ball 100 remains in a rotating state.

As shown in FIG. 6, the ball 100 moves through the launch tube 2 while maintaining its rotating state, and is launched from the launch port 21. This rotation is mechanically generated by the first rotor 51 and second rotor 52 that grip the ball 100. The rotation is not generated by friction from a friction-generating member as in the prior art. Therefore, the launched ball 100 has a reliable and sufficient rotation. In addition, because the rotation is mechanically generated by the rotary drive unit 6, the number of rotations is precisely controlled.

There are no problems such as the ball 100 being wet, deterioration of the friction imparting member, or a slow launch speed, and the ball is launched with a reliable rotation. In addition, since the ball is launched by mechanical rotation by the first rotor 51 and the second rotor 52, problems such as insufficient rotation can be reduced. Furthermore, since the rotation is mechanical, the number of rotations can be freely controlled. The ball 100 rotates at the desired number of rotations, regardless of the launch speed, the type of ball 100, the length of the launch tube 2, the characteristics of the friction imparting member, etc. The ball 100 is launched in this rotating state, so the ball 100 can fly along an appropriate trajectory.

In this way, the ball launching device 1 of the present invention can launch the ball 100 with reliable rotation, without variations due to the external and internal environments. As a result, the flight of the ball 100 (from launch to arrival) can always be made stable. For this reason, it can be optimally used in a variety of locations, situations, and practice situations.

In addition, the launch speed of the ball 100 and the number of rotations imparted to the ball 100 can be controlled independently. This allows the ball 100 to be launched at a variety of speeds and rotations, such as a ball 100 that has a high number of rotations even at a low speed, or a ball 100 that has a low number of rotations even at a high speed.

(Launch tube)
The launch tube 2 is a main body that launches the ball 100. The launch tube 2 has a circular internal cross section, and may be configured to match the shape and size of the ball 100 to be launched. The external shape may be cylindrical or rectangular. As described above, a part of the launch tube 2 serves as the ball installation section 5.

The launch tube 2 has an ejection port 21 at its tip, through which the ball 100 is actually ejected. The ball 200 is ejected from this ejection port 21. Since there is no need to install a friction imparting member inside the launch tube 2, as in the prior art, the length of the launch tube 2 can also be shortened.

It is also preferable that the inner diameter and shape of the inside of the launch tube 2 are matched to the diameter and shape of the ball 100. The air pressure applied to the ball 100 can be sufficiently applied to the ball 100 inside the launch tube 2 (air is less likely to leak around the ball 100). Therefore, the ball can be launched efficiently from the launch tube 2.

The ball placement section 5 is provided with a supply port 3. A guide pipe for guiding the ball 100 may be provided above the supply port 3. The ball 100 is supplied from the supply port 3 to the inside of the launch tube 2 by this guide pipe.

(Ball holder)
The ball holder 50 is provided at a position corresponding to the supply port 3 and the position where air pressure is applied by the air pressure application unit 41. By providing it at this position, the ball 100 that enters from the supply port 3 is set directly into the ball holder 50. The ball holder 50 has a shape that receives the ball 100 according to its shape and size. This allows the ball 100 to be set properly inside the ball holder 50.

The ball holder 50 has a pair of openings 55 in opposing directions. Figures 4 and 5 show a pair of openings 55 that face each other. When balls 100 are being supplied from the supply port 3, the openings 55 face upwards and communicate with the supply port 3. This is the state shown in Figure 4. In Figure 4, the openings 55 face upwards.

On the other hand, when the ball holder 50 is rotated by the angle drive unit 7, the pair of openings 55 faces the ejection port 21 of the launch tube 2 and the air pressure applying unit 41, as shown in Figures 5 and 6. When the openings 55 are set in this direction, air pressure is applied to the ball 100 from the air pressure applying unit 41 through one of the openings 55. The ball 100 to which air pressure has been applied is launched from the other opening 55.

In this way, the ball holder 50 and the angle drive unit 7 can set the ball 100 supplied from the ball supply unit 3, rotate the ball 100 using the first rotor 51 and the second rotor 52, and launch the ball 100 by applying air pressure.

(Air pressure applying section)
7 is an explanatory diagram showing a part of the ball launching device in the first embodiment of the present invention as viewed from above. The air pressure applying unit 41 is connected to the compressed air tank 4. By being connected to the compressed air tank 4, the air pressure applying unit 41 can apply compressed air from the compressed air tank 4 to the ball 100. Also, as shown in FIG. 6, when the air pressure applying unit 41 applies air pressure, the opening 55 of the ball holder 50 opens along the launch tube 2.

This allows the air pressure applying unit 41 to apply air pressure to the back of the ball 100, moving the ball 100 to the ejection port 21 and launching it to the outside.

The control unit 9 also controls the air pressure applying unit 41. After detecting that the ball 100 has been set in the ball holder 50 from the supply port 3, the control unit 9 brings the first rotor 51 and the second rotor 52 into contact with the first side and the second side of the ball 100, respectively. At the same time, the control unit 9 issues an instruction to the rotation drive unit 6 to rotate the first rotor 51 and the second rotor 52. These rotations cause the ball 100 to rotate.

At this time, the control unit 9 or the rotation drive unit 6 sets the number of rotations of the ball 100, etc. Based on this setting, the rotation drive unit 6 rotates the ball 100 at a predetermined number of rotations. When the control unit 9 detects that the number of rotations has become appropriate or a certain amount of time has passed since the start of rotation, it outputs an instruction signal to the separation control unit 8 and the angle drive unit 7. The angle drive unit 7 rotates the ball holder 50 to create a state in which it can be launched by applying air pressure. In response to this, the separation control unit 8 separates the first rotor 51 and the second rotor 52 from the ball 100.

In addition, in conjunction with these (linked with them), the control unit 9 instructs the air pressure applying unit 41 to apply air pressure. The air pressure applying unit 41, upon receiving the instruction, applies air pressure to the back surface of the ball 100 as described above. At this moment, the ball holder 50 has rotated to a state in which air pressure can be applied and the ball 100 can be launched from the launch tube 2, and the first rotor 51 and the second rotor 52 are separated from the ball 100. The control unit 9 controls these. As a result, the air pressure applying unit 41 can apply air pressure to launch the ball 100, and the ball 100 is launched from the launch tube 2.

The air pressure applying unit 41 applies air pressure using compressed air from the compressed air tank 4.

(First rotor, second rotor)
3 to 7, the first rotor 51 and the second rotor 52 come into contact with both side surfaces of the ball 100 to rotate the ball 100. As shown in Fig. 7, the first rotor 51 and the second rotor 52 may each have a structure that penetrates the ball holder 50. By having the structure that penetrates the ball holder 50, the first rotor 51 and the second rotor 52 can easily come into contact with and separate from the ball 100 set in the ball holder 50.

When the control unit 9 detects that the ball 100 has been set in the ball holder 50, it outputs an instruction signal to the first rotor 51 and the second rotor 52. Upon receiving this instruction, the first rotor 51 and the second rotor 52 each move toward the ball 100 and grasp (hold) the ball 100. As shown in FIG. 7, in a configuration that penetrates the ball holder 50, the first rotor 51 and the second rotor 52 penetrate the ball holder 50 and approach the ball 100 set in the ball holder 50. When approaching, the first rotor 51 and the second rotor 52 grasp the ball 100.

The control unit 9 also instructs the rotation drive unit 6 to rotate in conjunction with the movement of the first rotor 51 and the second rotor 52. It also issues instructions to the angle drive unit 7, which operates during rotation.

As a result, the first rotor 51 and the second rotor 52 grip (hold) the ball 100 from both sides, causing the ball 100 to rotate. At this time, a rotation drive unit 6 such as a motor may be connected to only one of the first rotor 51 and the second rotor 52, causing only one to rotate. In this case, the rotor that cannot be rotated directly may be configured to rotate by receiving the rotation of the other rotor. Even in this state, the first rotor 51 and the second rotor 52 can rotate the ball 100.

Alternatively, the rotary drive unit 6 may directly rotate both the first rotor 51 and the second rotor 52. In this case, the first rotor 51 and the second rotor 52 can also rotate the ball 100. In the latter case, a more sufficient level of rotation can be achieved.

Furthermore, based on the control by the control unit 9, the rotation drive unit 6 can change the rotation speed, etc. This change in rotation speed allows each of the first rotor 51 and the second rotor 52, which actually rotate the ball 100, to change the rotation speed of the ball 100. The rotation speed appropriate for stabilizing the launch trajectory may differ depending on the speed. Alternatively, there is an optimal rotation speed depending on the type of ball 100, the purpose of using the ball launching device 1, the external environment in which it is used, the type of ball, etc. The rotation drive unit 6 can change the rotation speed to match these and rotate the ball 100.

As shown in Figures 3 to 7, the first rotor 51 and the second rotor 52 may grip the ball 100 from the first and second sides, which are exactly on either side of the direction of movement of the launch tube 2. In this case, the ball 100 rotates on an axis of rotation that is approximately perpendicular to the direction of launch. The ball 100 receives air pressure while rotating on this approximately perpendicular axis of rotation, and is launched from the launch tube 2.

Figure 8 is a front view of the launch tube in embodiment 1 of the present invention as seen from the front. It shows the state as seen from the ejection port 21 of the launch tube 2. The ball 100 is supplied to the ball holder 50 from the supply port 3 by dropping from above, for example. As shown in Figure 8, the ball holder 50 in which the ball 100 is set is connected to the ejection port 21. In this connected state, the ball 100 is rotated within the ball holder 50.

In the rotating state, air pressure is applied from the air pressure applying unit 41. At this time, as described above, since the ball holder 50 is rotating, the opening 55 of the ball holder 50 is in communication with the air pressure applying unit 41 and the ejection port 21. Due to this communication state, the ball 100 that has received air pressure from the air pressure applying unit 41 is launched from the ejection port 21.

(Compressed air tank)
As described above, air pressure applying unit 41 applies air pressure corresponding to the set ball speed to ball 100 using compressed air from compressed air tank 4. Fig. 9 is a side view of the compressed air tank and its surroundings in embodiment 1 of the present invention. Compressed air tank 4 is connected to air pressure applying unit 41. Air pressure applying unit 41 applies air pressure to ball 100 set in ball holder 50 in launch tube 2 (while ball 100 is in a rotating state).

For this reason, the compressed air tank 4 may also be provided and connected to the launch tube 2. Figure 9 shows one example of such a configuration. The compressed air tank 4 is connected to the rear end of the launch tube 2. This allows the air pressure applying unit 41 to release compressed air from the compressed air tank 4 and apply it to the ball 100 as air pressure.

(Separation control unit)
The separation control unit 8 separates the first rotor 51 and the second rotor 52 from both sides of the gripped ball 100. By separating them while rotating, the ball 100 can be launched by applying air pressure.

At this time, the separation control unit 8 separates the first rotor 51 and the second rotor 52 just before air pressure is applied to the ball 100. This immediate separation allows the ball 100 to be launched by applying air pressure from the air pressure applying unit 41 while maintaining the rotation of the ball 100.

The control unit 9 controls the timing of the air pressure application by the air pressure application unit 41 and the separation timing in the separation control unit 8. Here, the control unit 9 sets the separation timing to a timing that is earlier by a predetermined time in conjunction with the air pressure application timing. At this separation timing that is earlier by a predetermined time, the control unit 9 controls the separation control unit 8 to separate the first rotor 51 and the second rotor 52.

The separation control unit 8 may separate the first rotor 51 and the second rotor 52 from the ball 100 using air pressure. By having the separation control unit 8 separate the first rotor 51 and the second rotor 52 using air pressure, the separation operation can be performed at high speed. In addition, when controlling the timing of the application of air pressure and the separation timing from the control unit 9 in conjunction with each other, separation control using air pressure has the advantage of being able to respond quickly and operate accurately.

In particular, the air pressure applying unit 41 also applies air pressure to the ball 100. The separation control that immediately precedes this is also operated by air pressure. These linked operations are operated by air pressure, making it possible to perform accurate and swift operations.

Of course, the separation control unit 8 may separate the first rotor 51 and the second rotor 52 using mechanical or electronic operations rather than air pressure. In this case, the control unit 9 also controls the separation timing and the air pressure application timing in conjunction with each other.

As described above, the ball launching device 1 in embodiment 1 can launch the ball 100 with sufficient rotation to stabilize the flight trajectory without being affected by the internal or external environment.

(Embodiment 2)

Figure 10 is a side view of a ball launching device in embodiment 2 of the present invention.

First, the ball 100 is supplied from the supply port 3 into the launch tube 2. More specifically, the ball 100 is supplied into the ball installation section 5, which is part of the launch tube 2. The ball 100 is then supplied to the ball holder 50, where it is set.

The fact that the ball has been set in the ball holder 50 is detected. The detection result is output to the control unit 9. The control unit 9 outputs an instruction signal to the separation control unit 8. In response to the instruction signal, the separation control unit 8 brings the first rotor 51 and the second rotor 52 into contact with the ball 100. This contact causes the first rotor 51 and the second rotor 52 to grip the ball 100.

Next, based on the control of the control unit 9, the rotation drive unit 6 rotates the first rotor 51 and the second rotor 52. As the rotors rotate, the ball 100 being held also rotates. In other words, the ball 100 is rotated.

The control unit 9 also controls the angle drive unit 7. When the rotation speed of the ball 100 reaches a desired level, the angle drive unit 7 rotates the ball holder 50 while rotating the ball 100. By rotating, each of the pair of openings 55 of the ball holder 50 becomes connected along the launch tube 2. In other words, the ball 100 inside the launch tube 2 can be seen when viewed from the ejection port 21. Furthermore, the back surface of the ball 100 also becomes connected, enabling air pressure to be applied to the back surface of the ball 100.

The control unit 9 outputs a signal to the separation control unit 8 to instruct separation and a signal to apply air pressure to the air pressure applying unit 41 in a linked manner. This linkage is the separation timing and air pressure application timing described in embodiment 1. The separation control unit 8 separates the first rotor 51 and the second rotor 52 from the ball 100. Immediately after this, the air pressure applying unit 41 applies air pressure to the ball 100. At this time, the ball 100 is in a rotating state.

By applying air pressure, the ball 100 in a rotating state moves inside the launch tube 2 and is launched from the launch port 21. The launched ball 100 has a sufficient number of rotations, so it is launched (flies) on a stable trajectory.

The ball launching device 1 described in the first and second embodiments can be used for practice and recreation of various ball games, such as baseball and tennis. A ball appropriate for the type of ball game being played can be used.

The ball launching device described above in the first and second embodiments is an example that illustrates the gist of the present invention, and includes modifications and alterations that do not deviate from the gist of the present invention.

REFERENCE SIGNS LIST 1 Ball launching device 2 Launch tube 21 Launch port 3 Supply port 4 Compressed air tank 41 Air pressure applying section 5 Ball installation section 51 First rotor 52 Second rotor 6 Rotation drive section 7 Angle drive section 8 Distance control section 9 Control section 100 Ball

Claims (12)

a launcher that moves the ball when the ball is launched;
A supply port is provided on a rear end side of the launch tube and supplies the ball to the launch tube;
a ball holder provided inside the launch tube and configured to receive the balls supplied through the supply port;
a first rotor extending from a first side of the ball set in the ball holder and contacting a first side surface of the ball;
a second rotor that comes out from a second side of the ball set in the ball holder and contacts a second side surface of the ball to grip the ball with the first side surface and the second side surface together with the first rotor;
a rotation drive unit that rotates at least one of the first rotor and the second rotor;
An angle drive unit that rotates the angle of the ball holder;
an air pressure applying unit that applies air pressure to the ball rotating inside the ball holder;
a separation control unit that separates the first rotor and the second rotor from gripping the ball immediately before the air pressure is applied by the air pressure application unit;
A control unit that controls the ball from supply to launch,
The first side and the second side are opposite directions,
the first side surface is located at a position corresponding to the first lateral side, and the second side surface is located at a position corresponding to the second lateral side,
When the first rotor and the second rotor approach and contact the ball set in the ball holder, the first rotor and the second rotor grip the ball from the first side surface and the second side surface of the ball and rotate the ball,
A ball launching device, wherein the separation control unit separates the first rotor and the second rotor from the ball just before the air pressure applying unit applies air pressure to the ball, so that the air pressure applying unit can apply air pressure while the ball is in a rotating state. The ball launching device according to claim 1, wherein the ball launching device launches a ball by air pressure applied by the air pressure applying unit. The ball launching device according to claim 1 or 2, wherein the ball holder is provided at a position corresponding to the supply port and the position where air pressure is applied by the air pressure applying unit. The ball holder has a pair of openings in opposing directions,
When the balls are supplied from the supply port, the opening faces an upward side communicating with the supply port,
4. The ball launching device according to claim 3, wherein when air pressure is applied from the air pressure applying portion, each of the pair of openings faces the ejection port of the launch tube and the air pressure applying portion. The ball launching device according to claim 4, wherein the angular drive unit rotates the ball holder while the ball is rotating and before air pressure is applied to the ball, so that each of the pair of openings faces the ejection port and the air pressure applying unit. the air pressure applying unit applies air pressure to the ball from one of the openings;
6. The ball launching device according to claim 5, wherein the ball to which air pressure is applied moves through the launch tube from the other of the openings and is launched from the ejection port. The ball launching device according to any one of claims 1 to 6, wherein both the first rotor and the second rotor rotate to rotate the ball being held. The ball launching device according to any one of claims 1 to 7, wherein the rotation drive unit is capable of changing the rotation speed of the ball through the first rotor and the second rotor. A ball launching device according to any one of claims 1 to 8, wherein the rotation drive unit is capable of changing the rotation direction of the ball through the first rotor and the second rotor. The ball launching device according to claim 9, wherein the rotation of the ball by the first rotor and the second rotor includes rotation about an axis of rotation substantially perpendicular to the direction of launch of the ball. the control unit controls an air pressure application timing by the air pressure application unit and a separation timing by the separation control unit,
11. The ball launching device according to claim 1, wherein the control unit controls the separation in the separation control unit to set the separation timing to a timing that is earlier by a predetermined time period linked to the air pressure application timing . When the ball is supplied to the ball holder from the supply port, the first rotor and the second rotor grip the ball,
the rotation drive unit rotates the first rotor and the second rotor to rotate the ball;
the angular drive unit rotates the ball holder to direct the opening toward the ejection port and the air pressure applying unit;
the control unit outputs a control signal for controlling the application of air pressure by the air pressure application unit and the separation by the separation control unit;
The separation control unit separates the first rotor and the second rotor from the ball,
the air pressure applying unit applies air pressure to the ball immediately after the ball is separated;
5. The ball launching device according to claim 4 , wherein the ball in the rotating state moves through the launch tube and is launched from the launch port by application of air pressure.