JPS6138620Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is a simple pitching machine whose power source is a spiral spring, and is mainly concerned with a batting machine that is most suitable as a toss batting machine.

In conventional pitching machines, the main part of the pitching machine was an electric drive, which made the pitching machine very expensive. In addition, this electric pitching machine can only pitch at regular intervals due to the set internal mechanism, and pitches one after another regardless of the batter's will, so the batter can freely pitch each time. Batting in intervals was not possible.

This invention has been researched and developed in order to cope with such a conventional situation, and its details will be explained below with reference to the attached drawings based on a typical embodiment of this invention.

As can be seen from the front view of FIG. 1, the pitching machine of this invention rotates a pivot 2 with a threaded portion 1 on one side in the direction of tightening the thread, thereby making it possible to rotate the same shaft 2 in the tightening direction. A power spiral spring 3 is wound around the power spiral spring 3 to apply the return rotational force to the shaft 2, and in order to keep the gradually decreasing rotational force of the power spiral spring 3, which gradually decreases as the pivot shaft 2 rotates back, almost constant from beginning to end, In order to apply a proportional braking force in response to the gradually decreasing rotational force, a power control plate 5 that controls the rotation of the pivot shaft 2 through a compression coil spring 4 is screwed so as to move with the rotation of the pivot shaft 2, and spiral spring 3
A pitching arm 8 is connected to a power drive device 7 which is connected to a power adjustment brake 6 for adjusting the return rotational force itself to obtain a desired rotational speed.
A pitching drive device 9 is connected to the pitching drive device 9, which operates the rotation of the ball intermittently.

The pivot shaft 2 causes the rotational force of the power spiral spring 3 and the braking force of the power control plate 5 to act on each other through the rotation of the pivot shaft 2 to maintain a balance between the two. The thread pitch of the threaded portion 1 of the pivot shaft 2 is determined by the rotational force of the power spiral spring 3 per rotation of the pivot shaft 2, the compression force of the compression coil spring 4,
It must be determined by carefully considering the frictional force (coefficient) of the frictional part that presses the pivot shaft 2. Power control board 5
1 is a brake drum 12 in which a friction plate 10 is fitted to the end of a compression coil spring 4 and fixed to a pivot shaft 2.
The power control plate 5 and the friction plate 10 are both prevented from rotating by a guide stand 11. The power adjustment brake 6 has a brake band 13 wound around a brake drum 12 fixed to the pivot shaft 2, which is pulled by a tension coil spring 14, and the tension can be adjusted by an adjustment screw 15. In addition, this power adjustment brake 6
In addition to the above embodiments, although not shown, pressing a brake piece against the shaft 2 or the brake drum 12,
It may be possible to adjust this pressing force with screws or the like. In the figure, reference numeral 16 denotes a detachable handle for rotating the pivot shaft 2 in a direction for tightening the power spiral spring 3 via a small gear 17 and a large gear 18. 19 is a reverse rotation prevention claw for safety, 2
0 is the machine frame.

The pitching drive device 9 is mainly formed by directly or indirectly connecting the pitching arm 8 and the intermittent operation mechanism 21 to the pivot 2. In this embodiment, the pitching arm 8 and the intermittent operation mechanism 21 are connected to the pivot 2, and the intermittent operation mechanism 2 is connected to the motion axis 2.
2, One-way rotation transmission 23 and motion arm 2
The pivot 2 is indirectly connected to the moving shaft 22 by the pivot 2 and the power spring 3. The one-way rotation transmission 23 transmits only the rotation of the pivot 2 in the return direction to the moving shaft 22, and does not transmit the rotation in the tightening direction, and is composed of a latching pin type, ratchet type mechanism. The moving arm 24 is for increasing the throwing power of the pitching arm 8, and is made of a leaf spring material erected on the moving shaft 22. When it rotates, it is bent by the shaft roll 25, and after fully storing the kinetic energy of both the power spiral spring 3 and the moving arm 24, it is released all at once, and the pitching arm 8 is powerfully jumped. The pitching arm 8 has a ball holder 26 at the upper end, which is suitable for holding and throwing the ball, and is supported by the moving arm 24 so as to be able to swing freely, and is cushioned by the cushioning device 27 immediately after the pitching and pushed back to its original position. The ball thrower 28 is for automatically supplying balls to the pitching arm 8, and the action of the ball holder 26 causes a pair of upper and lower claws to alternately release and hold the balls inside the machine.

The intermittent operation mechanism 21 is used to rotate or stop the movement shaft 22 intermittently and arbitrarily by remote control, and is composed of an engaging disk 29', an engaging mechanism 30, and an operating mechanism 31. The engaging disk 29 has convex engaging portions 32, 32 on the circumferential surface, and the movement axis 22
It is attached to. The engaging mechanism 30 has a convex engaging portion 3
3 is pressed by an internal spring to abut on the circumferential surface of the engaging disc 29, and is capable of engaging and detaching from the engaging portion 32. The operating mechanism 31 has a lever 37 that engages with the engaging portion 33 of the engagement pin 34 on a disc 36 which is rotatably supported together with a torsion coil spring by attaching a rope 35 to one end thereof, and the lever 37 is mounted on a disc 36 that is rotatably supported together with a torsion coil spring. Pivotally supported,
A receiving pin 38 is installed on the lever 37 side. This operating mechanism 31 has a disk 36 that is connected to the rope 3.
When the lever 37 is rotated by a predetermined angle in the pulling direction of the lever 37, the engaging portion 33 engages with the engaging pin 3.
4 detaches from the engaging portion 32 of the engaging disc 29, releases the movement shaft 22 and rotates it, and at the same time, the lever 37
is disengaged from the engaging portion 33, the engaging pin 34 immediately contacts the circumferential surface of the engaging disk 29 and engages with the next engaging portion 32, thereby stopping the rotation of the motion shaft 22. Further, when the disk 36 returns to its original position, the lever 37 hits the engaging portion 33 and returns while falling down, and then stands up at its original position. A foot-operated operating device 39 connected to the rope 35
The rope 35 is pulled to rotate the disc 36 by the predetermined angle, and the intermittent operation mechanism 21 is remotely controlled. Furthermore, this intermittent operation mechanism 2
In addition to the above-mentioned embodiments, 1 is not shown, but there is a method in which a solenoid-type engaging pin is opposed to the engaging disk 29 and is operated intermittently and arbitrarily by electrical remote control, or a method in which the engaging pin is operated intermittently and arbitrarily at fixed time intervals. It may also be possible to set an electrical relay that is activated intermittently and automatically.

Next, the function and use of this pitching machine will be explained. First, rotate the handle 16 to sufficiently tighten the power spiral spring 3 to store sufficient rotational kinetic energy, and then remove the reverse rotation prevention pawl 19 from the large gear 18 (even if it is removed, the intermittent operation mechanism
1, the pivot 2 and the movement axis 22 are at rest. ), finishing preparations for pitching. At this time, the power control plate 5 is moved by the rotation of the pivot shaft 2, presses the friction plate 10 against the brake drum 12 via the compression coil spring 4, and applies a braking force corresponding to the return rotational force of the power spiral spring 3 to the pivot shaft 2. It is in the state of being given to. Moreover, the motion shaft 22 remains in a stopped state even while the pivot shaft 2 is rotating due to the action of the one-way rotation transmitter 23. Therefore, a batter who wants to practice batting takes his stance at a considerable distance from the pitching machine, steps on the operating device 39 fixed to his feet in advance, and then removes it (there is no problem even if he does not necessarily remove it). After that, you will hit the ball that is pitched to you. At this time, the rope 35 pulled by the operating device 39 rotates the disk 36 of the operating mechanism 31 by a predetermined angle, and the lever 37 causes the engagement mechanism 30 to rotate.
The engaging pin 34 is removed from the engaging portion 32 of the engaging disc 29, and the movement shaft 22 is released and rotated. Due to this rotation of the motion shaft 22, the motion arm 24 is once locked to the shaft roll 25, and while bending, it stores enough kinetic energy of both the power spiral spring 3 and the motion arm 24, and then detaches from the shaft roll 25 and becomes strong. Kick the pitching arm 8. As a result, the pitching arm 8 rotates at high speed and releases the ball (throwing).
At the same time when the ball is returned to its original position by the cushioning machine 27, the claw of the ball throwing machine 28 is operated to receive the ball. Note that, due to the engagement of the intermittent operation mechanism 21, the movement shaft 22 is stopped after completing half a rotation and is in a state waiting for the next operation. In this way, the batter can repeatedly pitch and hit the ball while stepping on the operating device 39 at a free timing each time. At this time, the power spiral spring 3
With the intermittent rotation of the pivot shaft 2, the rotational force gradually decreases, and in proportion to this, the power control plate 5 also moves intermittently, loosening the compression force on the compression coil spring 4, and rotating the pivot shaft 2. Since the braking force is gradually weakened, the rotational force of the pivot shaft 2 is kept substantially constant throughout the entire movement. Then, when the rotational force finally begins to decline, the power spiral spring 3 may be tightened again using the handle 16.

As described above, the pitching machine of this invention is a simple type whose main parts are all manual mechanisms, so it can be manufactured at low cost and can be owned by individuals or teams. Since the power source is a spiral spring, there is no need to worry about the power supply when using it, and since it is relatively lightweight, it is easy to move, making it very convenient to use on the ground. Become. especially,
This pitching machine differs from conventional electric pitching machines in that it can be operated as desired, so if it is equipped with an intermittent operation mechanism 21 that can be remotely controlled as in this embodiment, it can be adjusted to the batter's preference. It is possible to practice batting at free intervals according to the individual's timing, and it is also possible to practice alone without the need for an attendant.

In addition, this pitching machine has a pitching arm 8.
Although the desired purpose can be achieved by directly connecting the arm 24 to the pivot 2, as in this embodiment, the movable arm 24 made of a leaf spring and the shaft roll 25 that temporarily locks it
By providing this, the pitching power can be further increased. This pitching machine is mainly useful for batting practice when catching the ball with a true ball while creating your own batting home, and for that type of toss batting.

[Brief explanation of the drawing]

The drawings show a typical embodiment of this invention; FIG. 1 is a partially cutaway front view, and FIG. 2 is a side view. 1: Threaded part, 2: Pivot, 3: Power spiral spring,
4: Compression coil spring, 5: Power control board, 6: Power adjustment brake, 7: Power drive device, 8: Pitching arm, 9: Pitching drive device, 21: Intermittent operation mechanism, 2
2: Movement axis, 23: One-way rotation transmitter, 24: Movement arm, 39: Foot-operated operating device.

Claims (1)

[Scope of utility model registration request] A control device consisting of a compression coil spring, a power control plate, a friction plate, and a guide stand, as well as a power adjustment brake are incorporated into a pivot shaft around which a power spiral spring is wound to form a power drive device. A pitching machine that has a motion axis interlocked with one end of the pitcher, and a pitching drive device disposed on the motion axis via an intermittent driving mechanism.