JPH06210039A - Oriented ball shooting device - Google Patents

Abstract

PURPOSE: To make correct hitting movement possible with use of a simple means by mounting a hitting arm constrained within a swinging plane, arranging a hitting cum plate in a radial direction of a rotation axis movably on rotating mass, making the hitting cum plate movable from a home position to a hitting position and applying force on the hitting arm at the hitting position. CONSTITUTION: A hitting arm 20 is mounted constrained within a swinging plane. A hitting cum plate 7 is arranged in a radical direction of a rotation axis 31 movably on rotating mass 1. The hitting cum plate 7 is made movable from a home position to a hitting position. Force is applied on the hitting arm 20 at the hitting position. The hitting arm 20 is a double lever arm which can be swung within a vertical swinging face. One end of the arm is a hitting element 21 and the other end supports an engaging part 22 which follows the hitting cum plate 7. The hitting arm 20 is brought to a start position when subjected to pre-tensile force by a spring 32. At the start position, the engaging part 22 is positioned within a circular track of the moved hitting cum plate 7. And, there are arranged buffers 24, 28 at both ends of the double lever arm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directional ball launching device according to the preamble of claim 1. Such devices are intended to enable the training of the player as close to reality as possible during ball competitions. In this case, it is preferable for the training device to be able to select different trajectories as much as possible in order to obtain some astounding effects. The device is particularly suitable for football firing, but may be used for other balls such as handballs, rugby balls, squash balls, tennis balls and the like.

[0002]

A device of this kind is known from DE-A-2651335, in which the swingable striking arm is acted upon by a rotating cam. The cam is mounted on a flywheel that constantly rotates. An idle disk is also provided on the same axis of rotation as the cam, and the swing arm abuts the disk in the home position. To fire the ball, the entire striking arm is moved parallel to its axis of rotation so that the striking arm reaches within the circle of rotation of the cam and is thereby momentarily swung. This swinging motion and the striking of the ball are performed below the rotation axis of the striking arm.

In the device according to EP-A-213195, the striking arm rotates with the rotary mass and forms with it a striking unit. For firing the ball, the striking arm is swung from the neutral position to the striking position, and in this striking position, the striking arm hits the ball. In this case, the striking arm makes a circular movement about the axis of rotation of the rotating mass and a swinging movement about its own axis of rotation.

The known device is not satisfactory in each case because the striking arm has to carry out a relatively complex movement in order to fire the ball. This, on the one hand, affects the possibility of spreading the ball trajectory over as wide a spectrum as possible. The high acceleration forces generated in the case of a percussion arm movement require expensive technical measures and the risk of failure is relatively high. Furthermore, the striking arm, which constantly rotates with the rotating mass, poses a certain risk of accident.

[0005]

SUMMARY OF THE INVENTION It is therefore the object of the invention to provide a device such as the one mentioned at the outset in which an accurate striking movement is possible using the simplest possible means. The device must be safe to operate and must be capable of a wide spectrum with different trajectory.

[0006]

This problem is solved according to the invention by a device having the features of claim 1.
A striking cam plate movably mounted on the rotating mass allows the striking arm to be mounted so as to be constrained within its swing plane. Since a force is applied to the striking arm only within its swing plane, the mechanical load on the striking arm is relatively small. In addition, this allows a very accurate firing of the ball.

It is particularly preferable that the striking arm is a double lever arm capable of swinging in a vertical swing plane, one end of which is a striking element and the other end of which supports an engaging member that follows the striking cam plate. . In this case, the engagement member is preferably formed as a roller rolling on the striking cam plate. In order to obtain a constant starting position, the striking arm is pretensioned by the spring into the starting position, in which the engagement member is in the circular track of the striking cam plate which has been moved to the striking position. Exists. Adjustable bumpers may be provided at both ends of the double lever arm to limit rocking movement. This, on the one hand, prevents a return movement of the lever in both directions and this also allows adjustment of the maximum possible arch movement within the specified limits of the striking arm.

A striking cam plate is provided at one end of the connecting rod, the axis of motion of the connecting rod intersects the axis of rotation, and the connecting rod is brought to the home position by the pre-compression force of the spring. Particularly preferred. In this case, a centrifugal force acts in the axial direction of the connecting rod and this centrifugal force can be used to hold the striking cam plate in the home position. The action of the striking cam plate is very simple when the connecting rod carries the engaging element, which cooperates with the moving cam plate which is engageable and disengageable in the sector of the rotating mass, In the sector, the striking cam plate exerts a force on the striking arm, in which case the connecting rod can move to the striking position against the spring force when the moving cam plate is engaged. Therefore, the rotary movement of the rotary mass can be used particularly easily to accelerate the co-rotating striking cam plate. When the rotating mass is formed as a hollow shaft and the connecting rod is guided in the hollow shaft, a structurally highly advantageous arrangement is formed. The mass moment of inertia of the rotating mass can be changed by the wall thickness of the hollow shaft and by appropriate material selection. The hollow shaft serves in a simple manner as a bearing for a connecting rod with a striking cam plate. Obviously, instead of a hollow shaft, the rotating mass may be a circular disk on which the connecting rod is guided by other means.

A striking means is provided when the control means comprises a joint which is connected to a rotary drive of the rotary mass and which joint engages and disengages the moving cam plate at a particular switch position. It is possible to obtain a very precise control of the cam plate. In this case, the joint is provided with joint fingers, which are 360 ° in the connected state.
Rotating, during which the coupling finger engages a moving cam plate, which is lockable in the engaged position by a locking element and which locks the locking element before the coupling finger has finished its one revolution. Release again to disengage the moving cam plate. Therefore, the motion is accurately transmitted under the joint rotationally driven in synchronization with the rotating mass, and the motion accurately operates the moving cam plate in the correct relative posture. This transmission operates reliably even at high speed rotation of the rotating mass. In this case, the joint is in particular a band spring joint, which transmits the only rotary movement only when the joint is actuated. Other individual features and advantages of the invention will be apparent from the detailed description of the embodiments and the drawings.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENT As is apparent from FIG. 1, the overall system consists essentially of an undercarriage 9 with wheels 14 and supporting legs 13. A housing 8 having a cover plate 10 is provided on the chassis. Housing is cover plate 1
From 0, it surrounds the rotating mass that rotates so that only the striking member 21 of the striking arm projects. Cover plate 1
0 is provided with a cross slide 25, and a ball holder 26 is provided on the cross slide 25 together with the storage table 11 so as to be movable in two directions. In this way, the ball 29 in the ball holder 26 to be fired can be moved closer to or further from the striking member 21 in the rocking plane. However, since the ball can be moved a little further from the swing plane at another time or at the same time, the ball will have a momentum on one or the other side when hit. A pointer 35, which moves with the cross slide 25, indicates on the scale 34 on the cover plate 10 the respective position of the cross slide and thus the expected ball trajectory. The cruciform slide is driven especially by an electric linear motor and is moved by an operating lever 36.

A drive motor 12 is additionally provided on the chassis 9, in which case an internal combustion engine, for example a lawn mower engine, is preferably used. The device according to the invention may thus always be driven at a constant speed. That is, the effective striking energy is changed by the adjustable ball holder 26 and thus not by the number of revolutions of the rotating mass, as is normally done in known devices. To change the rotational speed of the rotating mass, so-called adjustable electric motors have to be used, which is impractical in the case of mobile devices and there is a risk of accidents. Furthermore, in order to rapidly change the rotational speed of the inertial rotary mass, a relatively powerful and therefore heavy electric motor must be used. On the other hand, the internal combustion engine can be driven without a power source, and it is relatively lightweight and has few failures.

The function of the striking arm will be explained below with reference to FIGS. A rotating mass 1 is used as an energy store for obtaining the required striking energy, which rotating mass 1 is mounted on a shaft 3 and inside the housing 8 a rotating shaft 31.
It is provided so that it can be driven to rotate around. A belt wheel 2 is mounted on the shaft 3, and in the belt wheel 2, the shaft 3 is driven by a belt from a motor 12. Rotating mass 1
Is substantially composed of a hollow shaft 4, and a connecting rod 5 is movably provided in the hollow shaft. The connecting rod in this case intersects the axis of rotation 31. A striking cam plate 7 is attached to one end of the connecting rod.
Are fixed, and the striking cam plate 7 projects from the hollow shaft 4. At the opposite end, an engaging element 6 in the form of a moving roller is fixed to the connecting rod, which likewise penetrates the slit and projects from the hollow shaft 4. The function of these moving rollers will be described in detail later. A pre-compression force is applied to the connecting rod 5 in the direction of the arrow a by the compression spring 33 in the hollow shaft 4. This position corresponds to the home position, in which the striking cam plate 7 does not exert a force on the striking arm 20.

FIG. 3 shows a striking arm 20, which is mounted in the housing 8 or optionally on the cover plate 10 via a swivel joint 30. The striking arm is formed as a double lever that can be easily tilted, the double lever supporting the striking member 21 in its upper part. A roller 22 is rotatably provided at the lower end of the double lever. A tension spring 32 engaged with the upper lever pulls the striking arm to a start position, in which the striking arm has an adjustable shock absorber 2.
It is in contact with 8.

The ball holder 26 is arranged in the vertical swing plane of the striking member 21 so that the ball 29 exists within the swing range of the striking member. The brush 27 provided in the ball holder serves to hold the ball in the ball holder with as little resistance as possible.

At the lower part of the striking arm 20, the hollow shaft 4
Rotates in the direction of rotation b in the horizontal plane. As long as the striking cam plate 7 is in the home position shown in FIG. 2, the striking cam plate 7 does not come out of the position of the roller 22 and pass therethrough to come into contact with the roller 22. However, when the striking cam plate is moved to the striking position via the connecting rod 5, the circular trajectory of the striking cam plate intersects the roller 22 and the striking arm 20
Is swung in the direction of arrow c. In this case, the roller 22 rolls on the striking cam plate having an inclined surface, and finally the striking arm 20 reaches the end position shown by the chain line. At this time, the tension spring 32 is under tension, and the tension spring 32 subsequently tries to pull the striking arm back into the starting position. In the end position, the lower lever arm abuts the adjustable shock absorber 24.

Depending on how close the ball 29 is held to the striking member 21, the acceleration is strong or weak when the striking member swings. Ball 29
Depending on whether the ball is hit exactly at the center of the ball or at the side of the ball, it can be fired straight or laterally by inertial action. The vertical launch angle of the ball is changed by adjusting the tilt of the entire device, in which case, for example, the height of the support leg 13 (FIG. 1) is adjusted. In combination with the adjustable ball holder on the cruciform slide 25, a wide variety of trajectories is thus possible, so that the trajectory of the next ball is predicted by the training player. There is no such thing. Rotation speed of rotating mass is 600 to 7
It is always constant at 00 rpm, and this rotation speed does not need to be specifically monitored or controlled. In order to protect the ball and amplify the inertial action, the striking member 21
Has a rounded side on the upper bent portion.

The function of the control means for actuating the striking cam plate 7 can be seen clearly from FIGS. A band spring joint 15 is provided on the cover plate 10, and the band spring joint 15 is synchronously driven from the shaft 3 of the rotating mass 1 via a toothed belt 23. The joint 15 carries the joint finger 16, the radius of gyration of the joint finger 16 is shown in FIG. 6 and the joint finger 16 rotates with the rotating mass 1 in the direction of arrow d when the joint is actuated.

A moving cam plate 17 is rotatably coupled to the bearing shaft 18 below the cover plate 10. The moving cam plate supports the compression rod 38 at its free end, and the moving cam plate is the spring 3
A precompression force is applied by 7 to bring it to the separating position. The moving cam plate 17 moves on the plane of the moving roller 6. Since the compression rod 38 is within the working range of the joint finger 16, the moving cam plate 17 is moved outward in the direction of arrow e when the joint finger 16 rotates.

In the cover plate 10, a drop lever 39 is further rotatably connected to the swivel joint 41, and a holding rod 19 is fixed to the free end of the drop lever 39. A roller 40 is fixed to the drop lever, and the roller 40 is also within the rotation range of the joint finger 16 in the same manner.
The holding bar 19 is in contact with the moving cam plate 17 at the home position. The holding bar 19 drops downward only when the moving cam plate is moved. However, at this time,
The holding bar 19 acts as a locking element to prevent the return movement of the moving cam plate 17. Roller 40 is joint finger 1
When climbing onto 6, the drop lever 39 is pulled up in the direction of arrow f and the locking of the moving cam plate 17 is released again.

When the firing is released by actuating the switch, the following steps take place.

The switch pulse is stored in the electronic control unit until the rotating mass or hollow shaft 4 reaches a certain relative position, for example position X in FIG. The exact location is queried via the initiator. Hollow shaft 4
When reaches the position X, the electric pulse activates the joint 15, and the joint finger 16 rotates in synchronization with the hollow shaft 4. Subsequently, the joint is disconnected again. The joint finger 16 then moves the moving cam plate 17 outward against the force of the spring 37 to the position shown by the chain line in FIG. At the same time, the holding bar 19 locks the moving cam plate in its position. The hollow shaft 4 continues to rotate during this process, and the moving roller 6 rolls on the moving cam plate 17. At this time, the moving roller 6 opposes the force of the compression spring 33 and strikes the cam plate 7.
The connecting rod 5 provided with is pulled inward in the direction of arrow g.
At this time, the striking arm 20 is swung as described above at the position indicated by y in FIG. The lock must be released in advance in order to prevent the locked moving cam plate 17 from releasing a hit on the next rotation of the hollow shaft 4. This is the fitting finger 16
Is further rotated to push the roller 40 upward just before reaching its end position, thereby releasing the holding rod 19. At this time, the force of the spring 37 pushes the moving cam plate 17 to the neutral start position again, and the moving roller 6 rotates along the moving cam plate and moves.
Is never moved. The whole process is a fraction of a second
It is done within the range of. However, the joint finger 16
The joint 15 provided with allows very precise control of the movement process.

[Brief description of drawings]

1 is an overall perspective view of an apparatus according to the present invention.

FIG. 2 is a perspective view of a rotating mass.

FIG. 3 is a side view of a striking arm.

FIG. 4 is a plan view of the housing of the rotating mass with the striking cam plate control means.

FIG. 5 is a plan view of a rotating mass at two different angular positions.

FIG. 6 is a slightly enlarged plan view of the control means shown in FIG.

FIG. 7 is a side view of the control device shown in FIG.

[Explanation of symbols]

 1 rotating mass 4 hollow shaft 5 connecting rod 6 engaging element 7 striking cam plate 8 housing 15 joint 16 joint finger 17 moving cam plate 19 locking element 20 striking arm 21 striking element 22 engaging member 24, 28 shock absorber 25 cross-shaped slide 26 ball holder 29 ball 30 swivel joint 31 rotating shaft 32 spring

Claims (12)

[Claims] 1. A striking arm swingable around a swivel joint, and a rotary mass rotatable about a rotation axis, the rotary mass comprising:
A directional launching device for a ball from a ball holder comprising a striking cam plate mounted on the rotating mass such that the striking cam plate acts at a relative position with respect to the striking arm. The striking arm (20) is attached so as to be restrained in the swing plane, and the striking cam plate (7) is attached to the rotating mass (1) so as to be movable in the radial direction with respect to the rotation shaft (31). The striking cam plate (7) can be moved from the home position to the striking position by the control means (6, 17), and the striking arm (20) is exerted with force at the striking position. , A directional launching device for a ball from a ball holder. 2. The striking arm (20) is a double lever arm that can swing in a vertical swing plane, one end of which is a striking element (21) and the other end of which follows the striking cam plate (7). Device according to claim 1, characterized in that it carries a mating engagement member (22). 3. The striking arm (20) is pretensioned by a spring (32) and brought to a start position, in which the engagement member (22) is moved to the striking position. Device according to claim 2, characterized in that it lies within the circular trajectory of 7). 4. Device according to claim 2 or 3, characterized in that adjustable dampers (24, 28) are provided at both ends of the double lever arm to limit the rocking movement. . 5. A striking cam plate (7) is provided at one end of the connecting rod (5), and a movement axis of the connecting rod (5) is a rotating shaft (31).
5. Device according to any one of claims 1 to 4, characterized in that it intersects with and the connecting rod (5) is brought into the home position under the precompression force of a spring. 6. The engagement rod in the sector of the rotating mass (1) where the connecting rod (5) supports the engagement element (6) and the striking cam plate (7) exerts a force on the striking arm (20). The coupling element (6) cooperates with the movable cam plate (17) which can be engaged and disengaged, and when the movable cam plate (17) is engaged, the connecting rod (5) opposes the spring force to the striking position. The device of claim 5, wherein the device is movable. 7. The control means comprises a joint (15), said joint (15) being connected to a rotary drive of a rotating mass (1), said joint (15) being a moving cam plate in a particular switch position. Device according to claim 6, characterized in that (17) is engaged and disengaged. 8. The joint (15) comprises a joint finger (16), the joint finger (16) being in the connected state 36.
Rotate by 0 °, during which the joint finger (16) engages the moving cam plate (17), which is lockable in the engaged position by the locking element (19), the joint finger (16) Device according to claim 7, characterized in that before the end of its one revolution, the locking element (19) is released again to disengage the moving cam plate (17). 9. Rotating mass (1) is formed as a hollow shaft (4), in which the connecting rod (5) is guided, the connecting rod (5) being guided. Either one
The device according to paragraph. 10. The rotating mass (1) has a vertical axis of rotation (31).
Device according to any one of the preceding claims, characterized in that it can be driven to rotate around. 11. A ball holder (26) is provided on the cross slide (25) for changing the trajectory of the ball, the cross slide (25) being in and in the swing plane of the striking arm. Device according to any one of claims 1 to 10, characterized in that it is movable parallel to the plane of rocking. 12. A traversable housing (8) is provided with a striking arm (20) and a ball holder (26), the relative position of the housing (8) for changing the trajectory of the ball. Adjustable device according to any one of claims 1 to 11, characterized in that it is adjustable.