JPS5917329Y2 - pitching practice device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device that allows one person to practice pitching.

Conventional pitching practice machines are equipped with display boards or display devices that indicate the strike zone at predetermined positions on a net that is large enough to ensure safety in the event of a wild pitch. The disadvantage is that unless you check the exact landing position of the pitch at that moment, you cannot know the exact landing position of the pitch.

In view of this, the present invention allows the pitcher to accurately check where the pitch has hit using a light source, even after a certain period of time has elapsed, so that the pitcher can consider the next pitch. .

The present invention will be explained below based on examples.

In the figure, 1 is a net of the required size that is set up for safety to prevent pitches from accidentally reaching the outside in the event of a wild pitch. The four peripheries and the frame 2 are joined and integrated, and the frame net is made into a rectangular shape having the required size, or by bending the central rectangular part slightly forward at both ends to form a fan shape, as shown in the figure. It is equipped with an auxiliary net frame 3 placed open, and sometimes this frame 2 or 3
The net body can be fixed by burying the lower end of the net in the ground, or legs (not shown) can be installed at the lower ends of the frames 2 and 3 to make it portable when necessary. , fiber, etc., as desired.

In the net 1 in the center, two vertically parallel columns 4, 4 are integrally provided with the frame 2 approximately at the center thereof, and a strike zone indicator 5 is provided on the columns 4, 4 so as to be able to slide up and down. , the setting position of the display device can be adjusted in the vertical direction.

This strike zone display device 5 consists of a strike zone board 5a that displays concentric circles where pitches hit, and an electronic display board 5b adjacent to the top of this strike zone board 5a that displays the pitch collision position by light. .

The strike zone plate 5a is not a single plate, but a rectangular one having an area at least equal to or larger than the impact area of the pitch, as shown in FIGS. 2 and 3, on the frame 51 of the strike zone plate. The small plates 52 are arranged in parallel in the vertical and horizontal directions as shown in FIG. 2, and each of the small plates 52 is provided with a plurality of guide rods 53. When receiving the impact pressure of a pitched ball, the small plate is guided by the guide rod and sinks into the frame 51, and a spring 54 is attached between the frame 51 and the small plate 52, so that the pressure is always above a certain level. The small plates are made to protrude so that they do not sink unless they are received, and the surfaces of each small plate are flush with each other, so that they are aligned as if they were one plate.

Also, a limit switch 55 is provided between the back surface of this small plate and the frame 51, and when the small plate receives the collision pressure of the pitcher and compresses the spring, and the small plate sinks, the switch 55 is actuated by the back surface of this small plate. Do it like this.

Each of the light bulbs 5 on the electric display board 5b provided above the strike zone board 5a is connected to a limit switch provided for each small plate.
Make electrical connections so that 6 lights up.

This electronic display board 5b has a large number of light bulbs 56 arranged at positions corresponding to the positions of each small plate constituting the strike zone board,
It connects the light bulbs to the limit switches on the corresponding small plates on the drawing board, and the surface of this electronic display board is covered with netting, transparent glass, or synthetic resin to prevent the light bulbs from being damaged even if hit by a wild pitch. Provide protective equipment such as boards.

Therefore, in order to practice pitching, the pitcher must move from the established net body to the required distance, such as home plate, pitcher's
All you have to do is keep the distance between the plates and aim for the strike zone board in the center of the net body.

At this time, when the small plate at the pitching position is pushed by the pitching collision pressure, the limit switch is turned on and the light bulb on the electric display board corresponding to the pitching collision position lights up.

This confirms the pitching position. The light bulb may be equipped with a device to keep it on until the pitcher pitches again, or it may be equipped with a device such as a timer so that it stays on for a certain period of time and then turns off.

Of course, any suitable well-known means can be applied to these lighting holding devices, and one example thereof is shown in FIGS. 4 and 5.

Figure 4 shows a device that keeps the light on until the pitcher turns it off when pitching again, and the lighting holding device A1 is the load circuit 5 of the SCR.
The light bulb circuit 59 is opened and closed by inserting a light bulb 56 directly into the circuit 7 or by using a relay 58, and the limit switch 55 is provided in the trigger circuit 60 of the SCR, and when the limit switch 55 is turned on, a trigger voltage is applied to the SCR. This turns on the light bulb circuit 59, causing the light bulb 56 to light up and hold.

Next, the pitcher turns off the normally closed switch SW, turns off the light, and moves on to the next pitching motion.

FIG. 5 shows a device in which the light is automatically turned off after being turned on for a certain period of time, and the lighting holding device A2 is constructed by providing a delay relay 6 in parallel with the relay 58 in the circuit shown in FIG.

This delay relay 61 may be a well-known R-C rechargeable delay relay that delays operation depending on the capacitor charging time, or a thermal delay relay that generates heat from a bimetal and operates a switch by mechanical displacement caused by the heat.

Alternatively, a timer driven by a normal motor may be used.

As a result, the SCR is activated by turning on the Limit I switch 55.
By applying a trigger signal to , the load circuit 57 and the light bulb circuit 59 are maintained in the ON state, the light bulb 56 lights up, and the delay relay 61 is activated, and after a certain period of time, the relay contact 61 a is opened and the light bulb 56 is turned off. urge

Relay contact 61a is then closed and maintained ready for further actuation.

As described above, according to the present invention, the strike zone plate has small picture-shaped plates arranged in parallel and is guided by a guide rod having a U-shaped conductor, so the operation of the small plates is extremely reliable and there is no possibility of errors. A limit switch that has the effect of not causing activation, and that is equipped with a limit switch on each small plate, an electric display board that remains lit for a certain period of time in proximity to the strike zone plate, and that is closed by a pitcher. The light bulb at the position corresponding to the ball is lit to indicate the ball's pitching position, so the pitching position can be accurately grasped, and since it is provided on an electronic display board that is displayed for a certain period of time, it can be confirmed without changing the pitching motion. The strike zone board and the electronic display board have the advantage that they can be adjusted up and down as a pair, and the strike zone can be arbitrarily set depending on the type of pitch.

[Brief explanation of the drawings] Figure 1 is an overall external view, Figure 2 is an enlarged view of the strike zone display section, Figure 3 is an enlarged cross-sectional view of the electronic display board, and Figures 4 and 5 are lighting retention. The electric circuit of the device is shown; FIG. 4 is an electric circuit diagram for manually turning off the light, and FIG. 5 is an electric circuit diagram for automatically turning off the light after a certain period of time. 1...Net, 2...Frame, 3.
... Auxiliary net frame 4 ... Support column, 5
...Display device, 5a...Strike zone board, 5b...Electronic display board, 51...
Frame, 52...Small plate, 53...Guide rod, 54...Spring, 55...
Limit switch, 56... Light bulb.

Claims (1)

[Scope of utility model registration request] A large number of small plates 52 are arranged in parallel on the frame 51, each of the small plates 52 is formed in the shape of a picture, and the frame 5
The small plate 52 is attached to a guide rod 53 that is slidably inserted into the frame 51, and is elastically supported by a spring 54 provided between the small plate 52 and the frame 51 so that it can move forward and backward.
Each of the strike zone plates 5a is equipped with a limit switch 55 that opens and closes a circuit by advancing and retreating, and a large number of light bulbs 56 are arranged at positions corresponding to the positions of each of the small plates 52. It consists of three parts: an electric display board 5b that connects the small plate limit switches 55 and light bulbs 56 at corresponding positions, and a lighting holding device that keeps the light bulbs 56 lit for the required time when each limit switch is closed. A pitching practice device characterized by: