JP3639025B2 - Thrower support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pitcher that is movably installed on a ground such as a baseball practice ground, and more particularly to a support device that supports a gantry for throwing a ball on the ground.
[0002]
[Prior art]
Various types of pitchers have been proposed.
[0003]
For example, first, a pitching arm that can rotate around a horizontal axis and a ball receiving portion that is attached to the protruding end of the pitching arm and can place a ball are provided. There is a so-called arm-type pitcher (for example, Japanese Utility Model Laid-Open No. 56-141676) in which an arm is rapidly rotated to throw a ball on the ball receiving portion.
[0004]
Secondly, there is a pair of rotating wheels that rotate in reverse to each other, and a ball is inserted between the outer peripheral surfaces of these rotating wheels.
[0005]
[Problems to be solved by the invention]
By the way, in any of the pitchers, the recoil at the time of pitching is loaded on the pitcher as an impact force.
[0006]
For this reason, if the pitching by the pitcher is repeated several times, the pitcher is gradually displaced from the position previously placed on the ground by the impact force, and from the desired pitching target area. There is a risk that the pitch accuracy will decrease gradually.
[0007]
Therefore, it is conceivable that the pitcher is grounded over a wide area of the ground so that the installation position of the pitcher is not easily displaced even when the impact force is applied.
[0008]
However, simply doing so causes a problem that the shape of the pitcher in plan view becomes large and the handling of the pitcher becomes complicated.
[0009]
On the other hand, in the arm-type pitcher, since the pitching arm rotates rapidly when pitching, it is necessary for the practitioner and the operator to be sufficiently away from the pitcher when pitching.
[0010]
However, this is not preferable because the space for practice is narrowed.
[0011]
Thus, it is conceivable to provide a protective net that covers the rotation trajectory of the pitching arm.
[0012]
However, if a protective net is simply provided, the shape of the pitcher increases, and in this case as well, there arises a problem that handling such as moving the pitcher becomes complicated.
[0013]
The present invention has been made paying attention to the above situation, and even if the pitcher repeats pitching, the pitching position viewed from the pitching target area is set so that the installation position of the pitcher on the ground is not deviated. An object is to prevent the accuracy from deteriorating.
[0014]
It is another object of the present invention to prevent a practice space from being narrowed even when the pitcher is an arm type and the pitching arm rotates rapidly at the time of pitching.
[0015]
Moreover, when solving each said subject, it makes it a subject to make it easy to handle the movement etc. of a pitcher so that the shape of a pitcher may not become large.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, a pitcher support device of the present invention is as follows.
[0017]
The invention of claim 1 is provided with a gantry 4 that is movably installed on the ground 3, and a pitcher body 5 that enables the ball 2 to be thrown forward is supported by the gantry 4 ,
[0018]
The ball throwing machine body 5, a rotary shaft 24 which is supported to the frame 4 so as to be rotatable in a horizontal axis 23 about a hitting arm 26 projecting from the rotary shaft 24 in the radial direction outward, the pitching A ball receiving portion 27 that is attached to the projecting end of the arm 26 and on which the ball 2 can be placed, and an angle range (an angle range) β of the other part of the entire circumference around the rotation shaft 24, the pitching arm 26 is composed of a spring 34 that biases in one direction around the axis 23 of the rotary shaft 24, and is mounted on the ball receiving portion 27 by the rotation of the pitching arm 26 by the bias of the spring 34. In a throwing machine in which the ball 2 is thrown forward,
[0019]
In a plan view, an auxiliary support base 68 is supported by the same base 4 so as to be able to move out of the base 4 outward, and a front jack (protruding end) 71 of the auxiliary support base 68 is placed on the ground 3. Make contact possible,
[0020]
The auxiliary support base 68 can be moved forward and backward from the front portion of the gantry 4 ,
[0021]
A protective net 74 is attached to the auxiliary support base 68 so that the protective net 74 and the auxiliary support base 68 can be withdrawn and retracted outward from the base 4, and the protective net 74 protruding from the base 4 is provided. The rotation trajectory 79 of the pitching arm 26 and the ball receiving portion 27 is covered from the outside.
[0022]
According to the invention of claim 2 , in addition to the invention of claim 1 , the gantry 4 is formed by a side member (pipe material) 64 extending in the horizontal direction, and at least a part of the auxiliary support base 68 is formed by the side member (pipe material). ) Ru der 64 that slidably fitted is allowed to.
[0023]
According to the invention of claim 3 , in addition to the invention of claim 1 or 2 , when the auxiliary support stand 68 protruding outward from the mount 4 does not reach a predetermined protruding position with respect to the mount 4 The pitching prevention means 81 for blocking the pitching by the pitcher main body 5 by stopping the driving of the electric motor 41 is provided.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0025]
1 to 3, reference numeral 1 is an arm-type pitcher for baseball practice, and an arrow Fr indicates the front in the pitching direction of the ball 2 by the pitcher 1, and the following left and right are horizontal directions toward the front. It shall be said.
[0026]
The pitcher 1 includes a gantry 4 that is slidably placed on a ground 3 that is a ground for baseball practice, and a pitcher main body that throws a ball 2 forward supported by the gantry 4. 5, a ball storage tank 6 that is supported by the gantry 4 and can store a large number of balls 2, and a ball 2 in the ball storage tank 6 for throwing the balls 2 one by one by the pitcher body 5. Are provided one by one to the pitcher main body 5.
[0027]
The gantry 4 includes a trolley 10 that is movably mounted on the ground 3. The trolley 10 has a base 11 and a plurality (4) of supporting the base 11 on the ground 3. ) Wheels 12.
[0028]
1 to 7, the gantry 4 has a gantry body 16 supported on a base 11 of the trolley 10 via a front buffer body 14 and a rear buffer body 15. The machine body 5 is supported.
[0029]
In particular, in FIG. 7, the front buffer body 14 is supported by the base 11 and has a columnar fixed body 17 whose axis is substantially vertical, and a cylinder that is externally fitted to the fixed body 17 so as to be slidable in the axial direction. And a pair of upper and lower springs 19 and 19 interposed between the fixed body 17 and the movable body 18, and the front buffer body 14 is elastically moved in its axial direction. It is supposed to be stretchable. A front portion of the gantry body 16 is pivotally supported on the movable body 18 by a pivot shaft 20. The pivot shaft 20 has an axial center extending left and right, and the rear side of the gantry body 16 extends around the pivot shaft 20. It can be turned up and down.
[0030]
The rear shock absorber 15 is elastically stretchable in the axial direction, and the length of the rear shock absorber 15 is adjustable by screws, and the gantry body 16 is tilted around the pivot shaft 20 by the expansion and contraction. The angle is variable.
[0031]
1 to 6, the pitcher main body 5 has a rotation shaft 24 having a shaft center 23 extending in the left-right direction, and the rotation shaft 24 is rotatable around the shaft center 23 so as to be rotatable about the front portion of the gantry body 16. Are supported by a pair of left and right bearings 25, 25.
[0032]
A throwing arm 26 is attached to the right end, which is one end of the rotating shaft 24. The throwing arm 26 projects radially outward from the rotating shaft 24, and has a V-shaped cross section at the projecting end of the rotating shaft 24. A spherical ball receiving portion 27 is attached, and the ball 2 can be placed on the ball receiving portion 27.
[0033]
A crank-shaped urging arm 29 is attached to the left end which is the other end of the rotating shaft 24, and the urging arm 29 protrudes radially outward from the rotating shaft 24. A pair of left and right coil spring-like springs 34 having one end portion 30 connected to the protruding end of the biasing arm 29 and the other end portion 32 extending rearward of the rotary shaft 24 that is substantially radially outward of the rotary shaft 24. , 34 is provided, and the other ends 32, 32 of the springs 34, 34 are connected to a part 33 which is the rear part of the gantry body 16 of the gantry 4. The protruding end of the urging arm 29 is pulled toward the part 33 of the gantry body 16 by the pair of left and right springs 34, 34.
[0034]
The protruding end of the urging arm 29 and the one end 30 of the spring 34 are pivotally supported by a front pivot pin 36 having an axial center extending left and right. The part 33 of the gantry body 16 and the other end 32 of the spring 34 are pivotally supported by a rear pivot pin 37 having an axial center extending left and right.
[0035]
As indicated by the solid line in each figure, in the free rotation state of the rotary shaft 24, the protruding end of the urging arm 29 is pulled toward the part 33 of the gantry body 16 by the tensile force of the springs 34, 34. Thus, as viewed from the line of sight along the axis 23 of the rotating shaft 24 (in side view), the axis 23 of the rotating shaft 24, the axis of the front pivot pin 36, and the longitudinal direction of each spring 34 are directed. The extending shaft center 38 and the shaft center of the rear pivot pin 37 are arranged substantially in a straight line in this order, and in this state, a stable stationary state is achieved. In this stationary state, the pitching arm 26 protrudes forward and downward from the rotating shaft 24. Such a state of the rotating shaft 24, the pitching arm 26, each spring 34, and the like is hereinafter referred to as an “initial state”.
[0036]
From the “initial state”, the rotation shaft 24 together with the pitching arm 26 and the rotation shaft are resisted against the tensile force of the springs 34, within a partial angle range α of the entire circumference around the rotation shaft 24. Drive means 40 is provided for rotating in one direction around the 24 shaft centers 23 (arrow A in each figure).
[0037]
Specifically, the partial angle range α is approximately 180 °, and when the rotary shaft 24 is rotated in the one direction by the partial angle range α from the “initial state”, the side view of FIG. As shown by the two-dot chain line, the axis of the front pivot pin 36, the axis 23 of the rotary shaft 24, the axis 38 of the spring 34, and the axis of the rear pivot pin 37 are substantially straight in this order. Will be lined up. At this time, the springs 34 and 34 do not rotate the rotating shaft 24 in any direction around the axis 23, but the springs 34 and 34 are in the maximum extension state, that is, the springs 34 and 34 have a tensile force. The maximum elastic energy by is stored.
[0038]
In the above state, if the rotating shaft 24 rotates at least slightly, the rotating shaft 24 is elastically rotated in the direction by the springs 34, 34, so that it is in an unstable stationary state. In the above state, the pitching arm 26 protrudes rearward and upward from the rotary shaft 24, and the pitching arm 26 is deviated 180 ° from that in the “initial state”. Such a state of the rotating shaft 24, the pitching arm 26, each spring 34, and the like is hereinafter referred to as a "neutral state".
[0039]
From the “neutral state” to a range of approximately 180 °, which is the angular range β of the other part of the entire circumference around the rotary shaft 24, the rotary shaft 24 is elastic energy by the tensile force of the springs 34, 34. Is rapidly rotated together with the pitching arm 26 in the same direction (arrow A), and the ball 2 placed on the ball receiving portion 27 is thrown forward.
[0040]
The drive means 40 includes an electric motor 41 and a speed reducer 42 supported by the gantry body 16, and power of the electric motor 41 is input to the speed reducer 42. A drive chain wheel 43 is attached to the output shaft of the speed reducer 42, while a driven chain wheel 44 is attached to the rotating shaft 24, and the driven chain wheel 44 is coupled to the drive chain wheel 43 by a transmission chain 45. ing.
[0041]
3 and 4, a pin-like engaged portion 47 protrudes from the base of the pitching arm 26, while a roller-like engaging portion 48 protrudes from the drive chain 43. When the electric motor 41 is driven, the engaging portion 48 rotates in the direction of arrow A in the drawing together with the driven chain wheel 44 via the speed reducer 42, the driving chain wheel 43, and the transmission chain 45. Then, the engaging portion 48 pushes the engaged portion 47 around the axis 23 of the rotating shaft 24 to rotate the pitching arm 26 together with the rotating shaft 24 in the direction of arrow A.
[0042]
When the ball receiving unit 27 is in a horizontal position during the rotation of the pitching arm 26 in the partial angle range α, as described above, the ball receiving unit 27 can supply one ball 2 from the ball supply device 7. Is supplied and placed.
[0043]
When the rotating shaft 24 and the pitching arm 26 are rotated within the partial angle range α by the driving of the driving means 40, the springs 34 and 34 temporarily move upward from the “initial state”. Thereafter, when the rotary shaft 24 and the pitching arm 26 exceed the “neutral state”, the rotary shaft 24 and the pitching arm 26 are rapidly moved in one direction by the springs 34 and 34 in the angular range β of the other portion. The ball 2 is rotated and the ball 2 is thrown forward. In the angle range β of the other portion, the engaged portion 47 is separated from the engaging portion 48 forward in the one direction, and the rotating shaft 24 and the pitching arm 26 are rotated regardless of the driving means 40. It is done. After the rotating shaft 24 and the pitching arm 26 are rotated by the springs 34, 34, the state returns to the “initial state”, and thereafter the above operation is repeated.
[0044]
In FIGS. 1, 2, 5, and 6, in the side view of the pitcher 1, the springs 34 and 34 extend and contract in the longitudinal direction (front-rear direction) while the rotary shaft 24 rotates within the angular range β of the other part. A regulating body 51 is provided that regulates the movement of the upper springs 34, 34 in the direction (downward) intersecting the longitudinal direction by pressing the midway part 50 in the longitudinal direction of the upper springs 34, 34 while the operation is allowed. It has been.
[0045]
The restricting body 51 includes a pair of left and right rollers 53 and 53 having an axis 52 substantially parallel to the axis 23 of the rotating shaft 24, and the rollers 53 and 53 can be rotated around the axis 52 by a support shaft 54. The bracket 55 is supported by being detachably fastened to the gantry body 16 by a fastener 57. Each roller 53 is disposed below the middle portion 50 of each spring 34, and the outer surface of each spring 34 can be brought into contact with the outer peripheral surface of each roller 53.
[0046]
In the above case, as indicated by the solid line in each figure, when the rotary shaft 24 and the pitching arm 26 are in the “initial state”, the outer surface of the intermediate portion 50 of each spring 34 and the outer peripheral surface of each roller 53 are There is a slight gap between them. The outer peripheral surface of each roller 53 may be slightly pressed against the outer surface of the middle portion 50 of each spring 34.
[0047]
In FIG. 5, according to the configuration of the pitcher 1 described above, the springs 34 temporarily move upward once in a part of the angle range α from the “initial state” of the rotating shaft 24 and the pitching arm 26, and Separate from each roller 53. Thereafter, in the angular range β of the other part from the “neutral state” of the rotary shaft 24 and the throwing arm 26 thereafter, each spring 34 rapidly rotates the rotary shaft 24 and the throwing arm 26 in one direction, The one end 30 of each spring 34 also rotates rapidly around the axis 23 of the rotating shaft 24 together with the protruding end of the biasing arm 29 (arrow B in FIG. 5).
[0048]
At this time, in a side view, each spring 34 coincides with an imaginary straight line connecting the axis 23 of the rotary shaft 24 and the other end 32 of each spring 34 (in FIG. 5, coincides with the axis 38 of the spring 34). Forward rotation (downward rotation) from the position on the line) toward the position (downward position) away from the virtual straight line with the other end 32 of each spring 34 as the center, and the virtual after the forward rotation. The backward rotation (upward rotation) returning to a straight line is attempted continuously and rapidly. That is, each spring 34 tends to reciprocate rapidly in a direction intersecting the longitudinal direction.
[0049]
However, as described above, when each spring 34 is going to rotate forward, each spring 34 has its midway portion 50 in contact with each roller 53 and rotates these rollers 53, so The contraction operation in the longitudinal direction is allowed, and in this state, the middle part 50 of each spring 34 is pressed against each roller 53 and each spring 34 is bent. As a result, each spring 34 is prevented from rotating forward about the other end portion 32 as a whole, and is also prevented from rotating backward by this. Only the part (front part) from 50 to the one end part 30 reciprocates around the pressure contact part to each roller 53.
[0050]
For this reason, as described above, when each spring 34 rapidly rotates the rotary shaft 24 and the pitching arm 26 in one direction in the angular range β of the other portion of the rotary shaft 24, the restriction body 51 causes this. Compared with the case where the spring 34 does not exist, the portion of the spring 34 that reciprocates is suppressed, that is, the inertial force that is to be generated in the spring 34 is suppressed.
[0051]
Therefore, since the impact force that is to be generated at the time of pitching is suppressed based on the inertial force, the impact force applied to the pitcher 1 is reduced. Therefore, the pitching is repeated with the elastic energy by the tensile force of the spring 34. However, it is possible to prevent the installation position of the pitcher 1 on the ground 3 from being deviated.
[0052]
In the above case, while the rotary shaft 24 rotates in the angular range β of the other portion, the spring 34 continues to contract in the longitudinal direction with the midway portion 50 in the longitudinal direction being in pressure contact with the outer peripheral surface of the roller 53. 24 and the pitching arm 26 are rotated. At this time, since the middle portion 50 of the spring 34 rotates the roller 53, the frictional force between them is kept small, and the spring 34 is contracted smoothly while the rotary shaft 24 and the throwing arm 26 are smoothly contracted. And rotate rapidly.
[0053]
Therefore, while the movement of the spring 34 is restricted in order to suppress the impact force that is to be generated at the time of pitching, the rapid rotation of the rotating shaft 24 and the pitching arm 26 by the spring 34 is ensured and sufficient. You can get a good ball speed.
[0054]
The roller 53 is formed of an elastic material such as urethane rubber.
[0055]
For this reason, when the midway part 50 in the longitudinal direction of the spring 34 is pressed against the outer peripheral surface of the roller 53 while the rotation shaft 24 rotates in the angular range β of the other part, the spring 34 and the roller 53 are in metal contact. It is prevented.
[0056]
5 and 6, the fastener 57 includes a long hole 58 formed in the bracket 55, a bolt 59 that passes through the long hole 58, and a nut 60 that is screwed to a through end of the bolt 59. The elongated hole 58 extends long in a direction intersecting the longitudinal direction of the spring 34 at a substantially right angle in a side view.
[0057]
In the above configuration, if the bolt 59 and the nut 60 are loosened, the regulating body 51 is moved in the longitudinal direction of the long hole 58, that is, in the crossing direction (arrow C in FIG. 6) approaching or separating from the spring 34. The position can be changed. The restriction body 51 may be fixed to the gantry body 16 by operating the bolt 59 and the nut 60 at a desired position.
[0058]
By the way, when the midway part 50 in the longitudinal direction of the spring 34 is brought into pressure contact with the restricting body 51 and the reciprocation of the spring 34 is restricted, if this restriction is made too large, the pressure contact force of the pressure contact becomes excessive, and the spring 34 Is hindered, and the rapid rotation of the rotating shaft 24 and the pitching arm 26 by the spring 34 is not ensured, and a sufficient ball speed may not be ensured.
[0059]
Therefore, as described above, the position of the restricting body 51 can be changed in the direction intersecting the longitudinal direction of the spring 34, thereby suppressing the impact force by restricting the reciprocation of the spring 34, and by the spring 34. The rotating shaft 24 and the rotation speed of the pitching arm 26 can be adjusted to desired states, respectively.
[0060]
1 to 3, the base 11 of the gantry 4 includes a pair of left and right side members 64, 64 extending in the horizontal direction in the front-rear direction, and a front binding material for connecting the front portions of the side members 64, 64 to each other. 65 and a rear binding member 66 for bonding the rear portions to each other. Each of the side members 64 is formed of a metal pipe material, and each front end thereof opens forward. A pair of left and right rear jacks 67 and 67 are attached to the rear portion of the base 11. If the rear jacks 67 are extended by screwing operations on these, the lower ends thereof can be brought into contact with the ground surface 3 in a press-contact manner. On the other hand, if each rear jack 67 is contracted, its lower end can be separated from the ground 3.
[0061]
2 and 3, an auxiliary support base 68 is supported on the base 4 so as to be able to move out from the front part of the base 4 toward the front, which is the outside thereof. This auxiliary support base 68 couples a pair of left and right side members 69, 69 slidably fitted back and forth to the side members 64, which are pipe members, and the front ends of these side members 69, 69. And a pair of front jacks 71 and 71 attached to the front ends of the side members 69, respectively. When the front jacks 71 and 71, which are protruding ends of the auxiliary support base 68, are extended by a screwing operation on the front jacks 71 and 71, their lower ends can be brought into contact with the ground 3 in a press-contact manner. On the other hand, if each front jack 71 is contracted, the lower end thereof can be separated from the ground 3.
[0062]
By the way, in the pitcher 1, the pitching arm 26 and the ball receiving portion 27 are rapidly rotated around the axis 23 of the rotating shaft 24 to throw the ball 2 forward. A large centrifugal force is generated in the ball 26 and the ball receiving portion 27, whereby the pitcher 1 is loaded with a large moment around the axis 23 of the rotary shaft 24 as an impact force.
[0063]
Therefore, as described above, the auxiliary support base 68 is protruded forward and backward from the front portion of the gantry 4 so that the front jacks 71 and 71 are pressed against the ground 3. The pitcher 1 is grounded to the ground 3 over a wide range of the ground 3 in the front-rear direction, and can sufficiently counter the moment.
[0064]
Therefore, in particular, even in the arm-type pitcher 1 loaded with a large impact force as a reaction during pitching, the pitcher 1 can be easily displaced from a predetermined installation position on the ground 3. Is prevented.
[0065]
A pair of left and right protective nets 74 and 74 are attached so as to straddle each side member 69 of the auxiliary support base 68 and each side member 64 of the base 11 of the gantry 4. One end of each of the protective nets 74 is fixed to the front end of the side member 69 that is the protruding end of the auxiliary support base 68, and the other end is slidable back and forth on the side member 64 of the base 11 of the gantry 4. A net frame 75 having a gate shape in a side view to be supported, and a net body 76 attached to the net frame 75 are configured.
[0066]
1 to 3, the auxiliary support base 68 and the protective net 74 are integrally protruded from the gantry 4 so as to be movable forward and backward, and each front jack 71 is connected to the ground 3. It is brought into pressure contact with the top. When the auxiliary support base 68 and the protective net 74 are protruded by a predetermined amount, a stopper 77 that abuts the rear portion of the net frame 75 that is a part of the protective net 74 and prevents further protrusion is provided. It protrudes from the base 11.
[0067]
In the protruding state, each protective net 74 covers the rotation locus 79 of the pitching arm 26 from the left and right outer sides.
[0068]
1 to 3, the auxiliary support base 68 and the protective net 74 can be integrally retracted toward the gantry 4. By retreating in this way, the auxiliary support stand 68 and the protective net 74 are stored, and the pitcher 1 becomes compact.
[0069]
1 and 3, an auxiliary support base 68 and a protective net 74 that protrude outward (forward) from the gantry 4 are in a predetermined projecting position relative to the gantry 4 (shown by a solid line in FIGS. 1 and 3). The pitching prevention means 81 is provided for blocking the pitching by the pitcher main body 5 when the pitch has not reached the position.
[0070]
The pitching blocking means 81 has a position detection sensor 82 that is attached to the side member 64 of the base 11 of the gantry 4 and is a limit switch built in the stopper 77, and the position detection sensor 82 is an electric motor 41. And are electrically connected.
[0071]
When the auxiliary support base 68 and the protective net 74 are projected from the gantry 4 and the rear portion of the net frame 75 of the protective net 74 does not reach the stopper 77, the position detection sensor 82 supports the auxiliary support. It is detected that the base 68 and the protective net 74 have not reached the predetermined protruding position, and the driving of the electric motor 41 is stopped, whereby the pitching by the pitcher main body 5 is prevented.
[0072]
FIG. 8 shows another embodiment of the present invention.
[0073]
According to this, the auxiliary support stand 68 includes a pair of left and right turning members 85 and 85 pivotally supported by the pivot shaft 84 at the front end of the base 11 of the gantry 4, and each of these turning members. And a front jack 71 attached to the pivot end of 85.
[0074]
As shown by the solid line in the figure, the pitcher 1 can be moved over a wide range of the ground 3 by rotating the rotating members 85 forward so as to protrude from the gantry 4 and bringing the front jack 71 into contact with the ground 3. The ground is grounded. In addition, when each said rotation member 85 rotates ahead, the fixing means which fixes these with respect to the said base 11 so that release | release is possible is provided.
[0075]
On the other hand, as shown by the phantom lines in the figure, the pitcher 1 becomes compact if the respective rotation members 85 are rotated so as to be retracted toward the gantry 4.
[0076]
Since other configurations and operations are the same as those of the above-described embodiment, the same reference numerals are attached to the drawings and description thereof is omitted.
[0077]
【The invention's effect】
The effects of the present invention are as follows.
[0078]
According to the invention of claim 1, a pedestal that is movably installed on the ground is provided, and a pitcher main body that allows a ball to be thrown forward is supported by the gantry ,
[0079]
The pitcher body is mounted on a rotating shaft supported by a gantry so as to be rotatable around a horizontal axis, a pitching arm projecting radially outward from the rotating shaft, and a projecting end of the pitching arm. And a spring that urges the pitching arm in one direction around the axis of the rotation shaft in a certain angular range of the entire circumference around the rotation axis. In a pitching machine configured and configured such that a ball placed on the ball receiving portion is thrown forward by rotation of a pitching arm by biasing of the spring,
[0080]
In plan view, an auxiliary support base is supported by the same base so that it can be moved out and out of the base, and the protruding end of the auxiliary support base can be brought into contact with the ground.
[0081]
For this reason, when throwing with a pitching machine, it is sufficient to project the auxiliary support base toward the outside of the gantry and bring the protruding end of the auxiliary support base into contact with the ground. The pitcher will be in contact with the ground over a large area of the ground.
[0082]
Therefore, even if the reaction at the time of pitching is applied to the pitcher as an impact force, the pitcher is prevented from being displaced from a predetermined installation position on the ground, and the pitching accuracy as viewed from the pitch target area is long-term, Keeps good.
[0083]
On the other hand, when the pitcher is moved, the auxiliary support base may be retracted toward the gantry, and in this way, the pitcher can be made compact.
[0084]
Therefore, handling such as movement of the pitcher when not in use can be facilitated.
[0085]
Further, the auxiliary support base can be moved forward and backward from the front portion of the gantry, and the following effects are produced.
[0086]
In the above throwing machine, since the pitching arm and the ball receiving part are rapidly rotated around the axis of the rotation shaft to throw the ball forward, a large centrifugal force is applied particularly to the pitching arm and the ball receiving part during the sudden rotation. As a result, the pitching machine is loaded with a large impact force around the axis of the rotating shaft.
[0087]
Therefore, as described above, the auxiliary support base can be moved forward and backward from the front part of the gantry, and for this reason, the pitcher is grounded over the wide range of the ground in the front-rear direction. Thus, the moment can be sufficiently countered.
[0088]
Therefore, in particular, even in an arm-type pitcher loaded with a large impact force as a reaction during pitching, it is prevented that the pitcher is easily displaced from a predetermined installation position on the ground. The
[0089]
In addition, a protective net is attached to the auxiliary support base so that the protective net can be moved out of and out of the base together with the auxiliary support base. The rotation trajectory of the part is covered from the outside.
[0090]
For this reason, when throwing with a pitching machine, the auxiliary support base and the protective net need only protrude outwardly from the gantry, and in this way, the rotation trajectory of the pitching arm and the ball receiving portion is on the outside thereof. Since it is covered from the direction, a practitioner etc. can approach the pitcher.
[0091]
Therefore, even if the pitching machine is an arm type and the pitching arm and the ball receiving part rotate rapidly at the time of pitching, the practice space is prevented from being narrowed.
[0092]
In addition, since the protection net is attached to the auxiliary support base, the protection net can be supported in a simple configuration because a separate support member for the protection net is not required.
[0093]
On the other hand, when the pitcher is moved, the auxiliary support base and the protection net may be moved backward toward the gantry, and in this way, the pitcher can be made compact.
[0094]
Therefore, handling such as movement of the pitcher can be facilitated while the protective net is provided in addition to the auxiliary support base.
[0095]
According to the invention of claim 2 , the gantry is formed of a pipe material extending in the horizontal direction, and at least a part of the auxiliary support base is slidably fitted into the pipe material.
[0096]
For this reason, when it makes it retract | suck toward an auxiliary support stand and a mount frame, the said auxiliary support stand will be accommodated more compactly.
[0097]
Therefore, handling such as movement of the pitcher is further facilitated.
[0098]
According to the invention of claim 3 , when the auxiliary support base that protrudes outward from the gantry does not reach the predetermined projecting position with respect to the gantry, the driving of the motor is stopped by stopping the driving of the electric motor. Throw prevention means for preventing throwing by is provided.
[0099]
For this reason, the pitching by the pitching machine in a state where the auxiliary support base is not protruded from the mount by a predetermined dimension is prevented.
[0100]
Therefore, an erroneous operation of the auxiliary support base is prevented, and it is more reliably prevented that the pitching machine is displaced from a predetermined installation position on the ground due to a recoil at the time of pitching.
[Brief description of the drawings]
FIG. 1 is a side view of a throwing machine.
FIG. 2 is a partially cutaway plan view of the throwing machine.
FIG. 3 is a front plan view of the pitcher.
4 is a partially enlarged cross-sectional view of FIG. 1 for explaining the rotation of a pitching arm. FIG.
FIG. 5 is a partially enlarged view of FIG. 1;
FIG. 6 is a rear sectional view of a regulating body.
FIG. 7 is a front sectional view of the front shock absorber.
FIG. 8 is a diagram corresponding to FIG. 3, showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thrower 2 Ball | bowl 3 Ground 4 Mount 23 Axis center 24 Rotating shaft 26 Throwing arm 27 Ball receiving part 29 Energizing arm 30 One end part 32 Other end part 33 Part 34 Spring 40 Driving means
41 Electric motor 50 Midway part 51 Restriction body 52 Shaft center 53 Roller 55 Bracket 64 Side member (pipe material)
68 Auxiliary support base 71 Front jack (protruding end)
74 Protective net 79 Rotating trajectory 81 Throw prevention means α Some angle ranges β Other angle ranges (a certain angle range)

Claims (3)

A platform that is movably installed on the ground is provided, and the pitcher body that allows the ball to be thrown forward is supported by the platform ,
The pitcher body is mounted on a rotating shaft supported by a gantry so as to be rotatable around a horizontal axis, a pitching arm projecting radially outward from the rotating shaft, and a projecting end of the pitching arm. And a spring that urges the pitching arm in one direction around the axis of the rotating shaft in a certain angular range of the entire circumference around the rotating shaft. In a pitching machine configured and configured such that the ball placed on the ball receiving portion is thrown forward by rotation of the pitching arm by biasing of the spring,
In plan view, an auxiliary support base is supported by the same base so as to be able to move out of the base outward, and the protruding end of the auxiliary support base can be brought into contact with the ground.
The auxiliary support base can be moved forward and backward from the front of the gantry ,
A protective net is attached to the auxiliary support base, and the protective net together with the auxiliary support base is made to be able to move out and out of the base. A support device for a pitcher that covers the rotation trajectory from the outside . The pitcher support device according to claim 1, wherein the frame is formed of a pipe material extending in a horizontal direction, and at least a part of the auxiliary support table is slidably fitted into the pipe material. Auxiliary support stand which projects outwardly from the rack base is, when it does not reach the predetermined projecting position relative to said frame, by stopping the driving of the motor, pitching blocking means for preventing pitching by the ball throwing machine body The support device for a pitcher according to claim 1 or 2 , wherein:

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