JPH0415246Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field: The present invention relates to a batting practice machine that is particularly effective for getting a feel for the timing of a hit and the response to an impact.

Background of the idea: It goes without saying that batting practice in baseball is best done by hitting pitches from a pitcher or a pitching machine, but due to restrictions such as location and number of people, it is currently not possible to practice as desired. . For this reason, batting practice is carried out by incorporating strike batting, batting, and sometimes even practice swings, but it is not possible to practice batting with a full swing continuously unless there is a certain amount of space and number of players. If the player were unable to do so and practiced by himself, it would take time and effort to set up the ball, or there would be an unavoidable risk of the ball turning over after being hit.

Purpose of the invention: The present invention was developed in view of the current situation, and it is possible to hit a ball attached to the tip of a ball arm of an appropriate length with a full swing with the same feeling as when hitting a pitcher, and yet. A batting practice machine that allows the ball to absorb the shock of the impact and return to a state similar to being pitched to the point of contact again, and by repeating such movements, the player can perform rational training in a small space by himself/herself. The purpose is to provide

Structure/Example of the invention: Hereinafter, one embodiment of the invention will be described based on the drawings. As shown in FIG. 1, the batting practice machine 10 of the present invention has a ball 6 fixed to the tip thereof at an appropriate height of a support 7 vertically erected on the ground or floor etc. by means of fixing legs 8, and rotates. Moving ball arm 5
A training aircraft main body 1 having a main body 1 is fixed thereto.

As shown in FIG. 2 or 3, the training aircraft main body 1 has an upper fixed plate 3, a lower fixed plate 4, and a rotary disk 2 interposed between them to connect the various parts shown in FIG. 2 (in this figure, the lower bearing and The upper bearing (not shown in the figure, and the upper or lower part of the stationary plate is designated for convenience) is assembled in a longitudinal cross-sectional view shown in FIG. 3.

That is, the lower fixed platen 4 has a column insertion hole 41 having the same cross-sectional shape as the column 7 extending vertically through it, and a flange-shaped portion 48.
The upper part is formed as a rotary disk fitting part 47, and the lower part is formed as a column fixing part 45 having a fastener such as a set bolt. An annular lower bearing groove 42 is formed on the upper surface of the flange-shaped portion 48, and a lower bearing 43 is installed in this groove. Also, on the upper surface of the flange-shaped portion 48, a fixed side suspension hole 44 is provided.
Also, fixed position clicks 46 are provided in the peripheral wall portions of the flange-like portions 48, respectively. The rotary disk 2 has a rotation hole 21 along the direction of the rotation axis, and the upper surface side of the rotation hole 21 is hollowed out to create an upper bearing seat 22, and the lower surface is similarly hollowed out and a spring 23 is housed in this area. Rotating side terminal 23' of this spring 23
can be inserted into the rotation side suspension hole 24 bored in the rotary disk 2, and the fixed side terminal 23'' can be inserted into the fixed side suspension hole 44 of the lower fixed plate 4. A notch 25 in the form of a partial wall that is concentric with the rotation hole 21 is provided upright therein, an annular lower bearing seat 27 is carved in the lower surface, and a portion of the side peripheral wall of the rotary disk 2 is further bulged to form a ball arm. Create a mounting part 26, insert and secure the base end of the ball arm 5,
Further, a rotational speed adjusting section 28 including a small ball to which pressing spring pressure is applied is provided on the lower surface of this ball arm mounting section 26, and this small ball engages with the fixed position click 46 of the lower fixed platen 4. At the same time, the ball arm 5 is fixed at the starting angle position, and the small ball rolled out of the fixed position click 46 is pressed against the outer peripheral wall surface of the flange-shaped part 48 of the lower fixed plate 4 by the spring pressure, and is fixed at the lower part. This contributes to maintaining the angular positional relationship between the disc 4 and the rotary disc 2 as well as the rotational speed of the rotary disc 2 in a predetermined state. Upper fixed plate 3
A column insertion hole 31 having the same cross-sectional shape as the column 7 runs through it vertically, and the upper fixed platen 3 can be fixed by screws passing through fixing screw holes 9, 9 arranged around the column insertion hole 31. The lower surface and the top surface of the rotary disk fitting portion 48 of the lower stationary platen 4 can be closely fixed to each other. The upper fixed plate 3 goes around the close contact portion and has a concentric upper bearing groove 36 and an annular groove 32, and an upper bearing 37 is installed in the upper bearing groove 36. As shown in FIG. 4, a part of the annular groove 32 is provided with a narrowed part 33 that is wide enough for the notch 25 of the rotary disk 2 to pass through, and the annular groove 32 other than this narrowed part 33 is A stopper 34 with a shock absorbing spring 35 is inserted so that it can move freely until either end comes into contact with the narrowed part 33.

The lower fixed plate 4, rotary plate 2, and upper fixed plate 3 constructed in this way can be assembled with a small gap between each plate by using screws or the like via the lower bearing 43 or upper bearing 37. , the rotary disk is located between the two stationary disks and can smoothly rotate as desired.

Functions and Effects of the Invention: The batting practice machine of the present invention constructed as described above allows right-handed batting practice in a state where the batting practice machine of the present invention is fixed to the appropriate height of the pillar 7 by the pillar fixing portion 45, as shown in FIG. That is, in the state shown in the figure, since the ball arm 5 has a swingable spiral base and is bent from the middle to the tip, the ball arm 5 is not obstructed at all, just like a ball actually pitched. The ball 6 can be hit without any trouble.

At the moment of impact, the rotary disk 2 begins to rotate, and at the same time, the repulsion impact force is leveled out by the swingable base spiral of the ball arm 5, allowing the user to feel the same follow-through as when hitting a flying ball in space. can. The rotary disk 2 continues to rotate against the elasticity of the springs such as coil springs, and as a result, as shown in FIG. The notch 25 begins to rotate in the direction indicated by the solid arrow, passes through the constricted portion 33, makes almost one revolution, and collides with the stopper 34 that includes the shock absorbing spring 35, and while pushing the stopper 34, the spring 23 is released. Rotate and go around one more time. On this second lap, Stopper 34 was in front of Notchi 25, so this time Stopper 3
4 is a notch 25 that cannot pass through the narrowed part 33 and follows.
The rotational inertia is absorbed by the shock absorption spring 35 and the spring 23 stops (the ball arm connected to the rotary disk stops).Then, it is activated by the tension of the shock absorption spring 35 and the spring 23 twists. Due to the reverse rotational force that is restored, the notch 25 begins to rotate back in the direction shown by the dashed line arrow, and only the notch 25 first goes around once, then passes through the narrowing part 33 and pushes the stopper 34, and then One more lap and it returns to its original form. Due to the functions of each part of the training machine main body 1, the impact force of the ball hit by the bat swing is gradually relaxed from the moment of impact, and the impact force is gradually reduced to approximately 2
Since the ball is absorbed as it travels, and then returns, the danger of the rebound hitting the person taking batting practice has been eliminated. Moreover, a certain amount of time is maintained from this hit until the original state is restored, and this time can be selected as appropriate by the rotational speed adjustment section 28, so if you aim for the timing of restoration, you can achieve the same effect as hitting a pitcher. You can practice sensing the timing of meat.

The embodiment shown in the drawings is adapted for batting in the right-handed batting box for a right-handed batter. If the ball arm 5 and the ball 6 are inverted and fixed to the support post 7 so that the ball 4 faces upward, the behavior of the ball arm 5 and the ball 6 will be symmetrical, allowing a left-handed batter to smoothly practice batting in the left-handed batting box.

In addition, in the above embodiment, the strut fixing part 45 is integrated with the training aircraft main body 1, but the same effect can be obtained even if it is separated and a support part that can be raised and lowered is attached to the strut 7 side. Needless to say, you can get it.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of the configuration of one embodiment of the present invention;
The figure shows the structure of the training aircraft body, FIG. 3 is a longitudinal cross-sectional view, and FIG. 4 is a bottom view of FIG. 2. 1...Trainer main body, 2...Rotary plate, 3...Upper fixed plate, 4...Lower fixed plate, 5...Ball arm, 6...Ball, 7...Stat, 8...Fixer leg,
9... Fixing screw hole, 10... Batting practice machine, 21...
... Rotation hole, 22 ... Upper bearing seat, 23 ... Spring, 24 ... Rotation side suspension hole, 25 ... Notch, 2
6...Ball arm attachment part, 27...Lower bearing seat, 28...Rotation speed adjustment part, 31...Strut insertion hole, 32...Annular groove, 33...Narrowing part, 34...
...Stopper, 35...Shock absorption spring, 36...
Upper bearing groove, 37... Upper bearing, 41...
...Strut insertion hole, 42...Lower bearing groove, 43...
...Lower bearing, 44...Fixed side suspension hole, 45...
...Strut fixing part, 46...Place click, 47...
...Rotating disk fitting part, 48...Flanged part.

Claims (1)

[Scope of utility model registration request] Rotation of the intermediate part between a stationary plate that has a rotating plate fitting part with a cylindrical outer periphery through which a non-cylindrical support installed in the practice area aligns, and another stationary plate that is closely fixed to the end surface of the rotating plate fitting part. A rotary disk with a ball attached to its outer circumferential surface via a ball arm and a spring for restoring its original state is fitted into the disk fitting part, and the other end of the spring is attached to the rotating disk, which is the opposite of a fixed plate. An annular groove that surrounds the tightly fixed part and has a narrowed part is carved in the fixed plate on the side, and a stopper with a shock absorbing spring is interposed in this annular groove. A notch in the form of a partial wall was formed on the sliding surface to allow passage through the narrowed part of the annular groove, and both fixed plates and the rotary plate in between were fixed as one body at an appropriate height position of the erected support. In this structure, when the ball is hit, the notch on the sliding surface of the rotary plate makes one turn in the annular groove of the fixed plate, passes through the constriction part, and then propels the stopper to make one more turn. This batting training machine is characterized by having a configuration in which the impact of a batting is absorbed by two rounds, and the Bauhm arm returns to its original shape by the restoring force of the subsequent stroke.