JP2019084219A - Ball feeder - Google Patents

Abstract

To provide a ball feeder capable of suppressing frictional electrification generated on a sponge ball.SOLUTION: A ball feeder for supplying a sponge ball to a ball shooting device for shooting a sponge ball comprises: a rail on which the sponge ball moves; a stopper for stopping the sponge ball; and a push-up part for feeding the sponge ball. The stopper stops the sponge ball by contacting a front side in a travel direction of the sponge ball on the rail at a lower limit position, and releases stop of the sponge ball by being lifted up from the lower limit position. The push-up part pushes up a rear side lower part in a travel direction of the sponge ball in linkage with lifting of the stopper from a lower limit position, for feeding the sponge ball to a front side in a travel direction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a ball supply device for supplying a ball to a pitching device used for practicing ball games such as baseball and tennis.

  There is a ball feeding device for feeding a ball to a throwing device. In the ball supply device disclosed in Patent Document 1, a space shorter than the diameter of the ball is provided between the upper side passage and the lower side passage for guiding the ball, and the ball rolled on the upper side passage is Stop temporarily by inserting. Furthermore, the balls are lifted from the lower side by the elevator that raises and lowers this space, and rides on the upper edge of the lower side passage. Thereby, the balls roll on the lower side passage and are supplied to the throwing device.

Patent No. 4029993

  When practicing baseball, tennis, etc. indoors, it is desirable to use a lightweight sponge ball instead of a heavy ball such as a hardball or a softball. When the sponge ball is supplied to the throwing device by the ball feeding device disclosed in Patent Document 1, when the sponge ball fitted in the above space is lifted by the elevating body, the sponge ball rubs against the upper end edge of the lower side passage. In the sponge ball made of a material that is easily charged such as urethane and polyethylene, frictional charging occurs by rubbing with the upper end edge of the lower side passage. If the lightweight sponge ball is charged, there is a possibility that the throwing device can not eject it normally due to the action of static electricity.

  The present invention has been made in view of such circumstances, and a main object thereof is to provide a ball supply device capable of solving the above-mentioned problems.

  In order to solve the problems described above, a ball feeding device according to one aspect of the present invention comprises: a rail on which the sponge ball is fed, which is fed to a throwing device that ejects a sponge ball; A stopper that stops the sponge ball by coming into contact with the front side in the direction of movement of the sponge ball and lifts the sponge ball by rising from the lower limit position, and interlocking with the rise from the lower limit position of the stopper The sponge ball has a projection that feeds the sponge ball forward in the traveling direction by pushing up the rear lower portion of the sponge ball in the traveling direction.

  In the above aspect, the ball supply device may include a liftable delivery member in which the stopper and the projection are integrally formed.

  In the above aspect, the stopper may have a corner at its lower end, and the corner may be in contact with the sponge ball at the lower limit position.

  In the above aspect, the projection may have a corner at an upper end thereof, and may be configured to push up the lower side in the traveling direction of the sponge ball at the corner.

  In the above aspect, a length of the projection in the traveling direction may be 1/3 or less of a diameter of the sponge ball.

  In the above aspect, the ball supply device may be configured to move the sponge ball following the sponge ball to be fed out to the rear in the traveling direction by raising the protrusion.

  According to the present invention, it is possible to suppress the frictional charging that occurs in the sponge ball.

The front view which shows the structure of the arm type pitching apparatus which concerns on embodiment. Side view showing the configuration of the arm type throwing apparatus according to the embodiment The top view of the arm which concerns on embodiment. The side view of the arm which concerns on embodiment. The perspective view which shows the structure of the ball | bowl mounting part in the arm type | mold ball throwing apparatus which concerns on embodiment. BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the structure of the arm type | mold ball throwing apparatus with which the ball supply apparatus which concerns on embodiment was attached. The rear view showing the composition of a ball sending mechanism. The front sectional view showing the sending member in the state where the sponge ball was stopped. Front sectional drawing which shows the delivery member of the state which sends out a sponge ball.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Each embodiment shown below is an example of a method and apparatus for embodying the technical idea of the present invention, and the technical idea of the present invention is not limited to the following. Absent. The technical concept of the present invention can be variously modified within the technical scope described in the claims.

  FIG. 1 is a front view showing a configuration of an arm type pitching apparatus according to the present embodiment, and FIG. 2 is a side view thereof. Hereinafter, the ejection direction of the sponge ball is referred to as "front", the opposite direction as "back", the right direction when facing back is referred to as "right", and the left direction as "left".

  First, the configuration of the arm type pitching apparatus 100 will be described with reference to the drawings. The arm type ball throwing device 100 according to the present embodiment includes an arm 200 and a rotation mechanism 300. The arm 200 can mount the sponge ball 400 to be ejected. The rotation mechanism 300 rotates the arm 200. The sponge ball 400 is ejected forward by the centrifugal force generated by the rotation of the arm 200. Hereinafter, the configuration of the arm type pitching apparatus 100 will be described in detail.

  3 and 4 are a plan view and a side view of the arm. The arm 200 has a semi-cylindrical member 210 and a crank 220. The semi-cylindrical member 210 has a V-shaped cross section and is formed to be long in one direction. Both end edges of the semi-cylindrical member 210 extending in the longitudinal direction, that is, the two tip portions on the open side of the V-shape are the rails 211 on which the sponge ball 400 rolls. The length of the rail 211 is set to 1/3 or more of the diameter of the sponge ball 400. In the semi-cylindrical members 210, rectangular lightening holes 212 are provided in a line in the longitudinal direction on both sides of the V-shaped bent portion, and are formed in a lattice shape as a whole. More specifically, in the semi-cylindrical member 210, two rod-like rail members 213 and the same rod-like central member 214 are disposed in parallel with each other and pass between the rail member 213 and the central member 214. A plurality of rod-like beam members 215 are provided at equal intervals. The rail member 213 and the center member 214 are provided such that the plane including the one rail member 213 and the center member 214 and the plane including the other rail member 213 and the center member 214 intersect at about 90 degrees. A space surrounded by one rail member 213, the center member 214, and two adjacent beam members 215 is a lightening hole 212.

  The shape of the lightening hole 212 is not limited to a rectangular shape, and may be a round shape, an elliptical shape, a triangle other polygonal shape, or the like. Alternatively, the half cylindrical member 210 may be configured such that two flat plates are connected in a V shape without providing the lightening hole 212. However, by providing the lightening holes 212, the weight of the semi-cylindrical member 210 can be reduced, and the air resistance generated when the arm 200 is rotated can be reduced. In addition, the cross-sectional shape of the semi-cylindrical member 210 is not limited to the V shape, and may be another concave shape such as a U shape, a C shape, or a U shape.

  The crank 220 is provided on the proximal end side of the semicylindrical member 210. A one-way clutch 221 is provided at one end side of the crank 220, and the one-way clutch 221 is connected to the output shaft of the rotation mechanism 300. A connection hole 222 is provided at the other end of the crank 220. The crank 220 is disposed on the proximal end side of the semicylindrical member 210 such that the longitudinal direction, that is, the direction connecting the one-way clutch 221 and the connection hole 222 is orthogonal to the longitudinal direction of the semicylindrical member 210. It is fixed. Further, a reinforcing member 230 is provided at an angle of 90 degrees between the semi-cylindrical member 210 and the crank 220, and the semi-cylindrical member 210 and the crank 220 are connected by the reinforcing member 230.

  Please refer to FIG. 1 and FIG. The rotation mechanism 300 includes a motor (not shown) and a transmission (not shown) such as a gear, a belt, a chain, and the like. The transmission has an output shaft, to which the one-way clutch 221 of the arm 200 is connected. The arm 200 is rotated by the rotation mechanism 300 in a counterclockwise (arrow direction in FIG. 2) direction (hereinafter referred to as “rotation direction”) when viewed from the right side. The one-way clutch 221 does not limit the rotation of the arm 200 in the rotational direction, but limits the rotation in the opposite direction. Thus, the rotational force of the output shaft in the rotational direction is transmitted to the arm 200 via the one-way clutch 221, and the arm 200 rotates in the rotational direction.

  The arm 200 and the rotation mechanism 300 as described above are attached to the gantry 500. In addition, a battery box 550 containing a battery serving as a power source is attached to the gantry 500.

  One end of a link 240 is connected to the connection hole 222 (see FIG. 4) of the crank 220, and one end of a spring 250 is connected to the other end of the link 240. The other end of the spring 250 is connected to a connector 510 fixed to the pedestal 500.

  Further, the pedestal 500 is provided with a ball placement portion 520 on which the sponge ball 400 to be ejected is placed. The ball mounting portion 520 has a rectangular frame 521 in which one short side portion is missing, and the length (width) of the short side of the frame 521 is slightly larger than the width of the arm 200. FIG. 5: is a perspective view which shows the structure of the ball mounting part 520 in the arm type | mold ball throwing apparatus 100 which concerns on this Embodiment. In FIG. 5, a part of the gantry 500 is omitted. The frame 521 is horizontally disposed with the longitudinal direction as the front-rear direction so that the open side is the front and the closed side (the short side portion side) is the rear behind the output shaft 310 of the rotation mechanism 300. Further, the frame body 521 is attached such that its short side portion is positioned rearward of the arm 200 in the state of extending rearward so as not to interfere with the rotating arm 200. That is, when the arm 200 rotates, the semi-cylindrical member 210 passes through the inner space of the frame 521.

  Further, the ball mounting portion 520 has a ball receiving portion 522 erected at the front end of the long side portion of the right side of the frame 521. A ball supply device for supplying a sponge ball is attached to the left side of the arm type ball throwing device 100, and the sponge ball 400 is supplied to the ball placement portion 520 from this ball supply device. The ball receiving portion 522 is curved with a curvature matched to the shape of the sponge ball 400, and the sponge ball 400 is received by the curved portion. The curved portion is inclined downward so as to be continuous with the frame 521, and the sponge ball 400 received by the curved portion is guided to the frame 521 along the inclination. The two long sides of the frame 521 are separated by a distance shorter than the diameter of the sponge ball 400, and the sponge ball 400 guided to the frame 521 is supported at the frontmost portion of the two long sides. .

  FIG. 6 is a front view showing a configuration of an arm-type ball throwing device to which a ball feeding device is attached. The spring 250 is omitted in FIG. The configuration of the ball supply device will be described with reference to FIG. The ball supply device 600 has a rail 700 and a ball feed mechanism 800. The rail 700 is a guide path for guiding the sponge ball 400 supplied to the arm type throwing apparatus 100 to the ball feeding mechanism 800, and the ball feeding mechanism 800 arm-type sponge balls 400 guided by the rail 700 one by one. Send to the pitching device 100.

  Above the rotation mechanism 300 of the arm type ball throwing device 100, a ball holding portion 530 for holding the sponge ball 400 is provided. The ball holding portion 530 is formed in a concave shape conforming to the shape of the sponge ball 400, and can hold the sponge ball 400 so as to be accommodated. The rail 700 is provided so as to extend from the ball holding portion 530 obliquely upward to the left. The rail 700 is formed in a semi-cylindrical shape having a semicircular shape in a cross sectional view, and the concave portion in a semicircular shape in a cross sectional view of the rail 700 has a diameter equal to or slightly larger than the diameter of the sponge ball 400 . A plurality of sponge balls 400 can be mounted on the rail 700 such that the rails 700 are arranged in a line. The sponge ball 400 placed on the rail 700 moves obliquely downward to the right along the inclination of the rail 700 and is guided to the ball holding portion 530.

  FIG. 7 is a rear view showing the configuration of the ball feed mechanism 800. As shown in FIG. The ball feeding mechanism 800 causes the sponge ball 400 sent from the rail 700 to stop at the ball holding unit 530, and sends the sponge ball 400 stopped at the ball holding unit 530 to the ball placement unit 520. The ball feed mechanism 800 has a motion conversion mechanism 810 for converting rotational motion of a slider crank mechanism or the like into linear motion, and a delivery member 820 for delivering the sponge ball 400. The output shaft 310 of the rotation mechanism 300 projects not only to the arm 200 side, that is, the right side, but also to the opposite side (left side) thereof (see FIG. 5). The portion of the output shaft 310 that protrudes to the left is connected to the motion conversion mechanism 810. A delivery member 820 is connected to the motion conversion mechanism 810, and the delivery member 820 reciprocates in the vertical direction by the motion conversion mechanism 810.

  The delivery member 820 has a stopper 821 for stopping the sponge ball 400 fed from the rail 700 to the ball holding portion 530, and a projection 822 for pushing up the sponge ball 400 held by the ball holding portion 530. The stopper 821 and the projecting portion 822 are integrated, and a delivery member 820 is configured. The guide member 823 is provided with two guide holes 823 and 824 extending vertically, and a pin 541 fixed to the rack 500 is provided in the guide hole 823 and a pin 542 is similarly inserted in the guide hole 824. ing. Thereby, the moving direction of the delivery member 820 is restricted in the vertical direction.

  FIG. 8 is a front sectional view showing the delivery member 820 in a state in which the sponge ball 400 is stopped, and FIG. 9 is a front sectional view showing the delivery member 820 in a state in which the sponge ball 400 is delivered. The stopper 821 has a bar-like shape extending in the front-rear direction. As shown in FIG. 8, when the delivery member 820 is at the lower limit of the movement range, the stopper 821 is at a position lower than the upper end of the sponge ball 400 held by the ball holding portion 530. As a result, when the sponge ball 400 tries to move from the ball holding portion 530 to the ball mounting portion 520 side, that is, the right side, the stopper 821 abuts on the right side of the sponge ball 400, ie, the front side in the traveling direction. Stops at the ball holding unit 530.

  The height from the spherical concave surface of the ball holding portion 530 (height from the lowest part of the spherical concave surface) at the lower limit position of the stopper 821 is longer than the radius of the sponge ball 400 and shorter than the diameter thereof. . Thereby, the stopper 821 abuts on the upper portion (portion higher than the radius of the sponge ball 400) of the sponge ball 400. Therefore, the stopper 821 abuts on the sponge ball 400 at the corner 823 of the lower end extending in the lateral direction with respect to the advancing direction of the sponge ball 400, that is, in the front-rear direction. Therefore, the area of the portion of the stopper 821 in contact with the sponge ball 400 is extremely small, and the frictional charging caused by the contact of the sponge ball 400 with the stopper 821 is suppressed.

  In addition, although the shape of the stopper 821 was made into rod shape here, it is not limited to this. The stopper 821 may have a shape other than a rod shape. In particular, a plate-like shape having corner portions is preferable because the contact area with the sponge ball 400 can be reduced.

  As shown in FIGS. 8 and 9, a through hole 531 is opened at a position slightly on the left side of the lowest portion of the spherical concave surface of the ball holding portion 530, that is, on the rear side in the traveling direction. The projecting portion 822 is in the shape of a bar extending in the vertical direction, and is positioned in the through hole 531. As shown in FIG. 8, when the delivery member 820 is positioned at the lower limit of the movement range, the upper end of the projection 822 is positioned below the concave surface of the ball holding portion 530. Therefore, in this case, the sponge ball 400 held by the ball holding portion 530 does not contact the projecting portion 822 and the holding of the sponge ball 400 by the ball holding portion 530 is not inhibited.

  The delivery member 820 is moved upward by the motion conversion mechanism 810. As a result, the stopper 821 moves upward above the upper end of the sponge ball 400 held by the ball holding portion 530, and the sponge ball 400 is released from the stop. At the same time, as shown in FIG. 9, the projection 822 moves upward through the through hole 531 and pushes up the sponge ball 400 from below. Since the through hole 531 is provided on the left side of the lowest part of the concave surface of the ball holding portion 530, the lower left portion of the sponge ball 400, that is, the lower rear portion in the traveling direction is pushed up by the projection 822. The projecting portion 822 has a short width in the front-rear direction, and has an angled portion 824 extending in the front-rear direction at the upper end thereof. The projecting portion 822 pushes up the rear lower portion in the direction of movement of the sponge ball 400 at the corner 824. As a result, the sponge ball 400 is pushed to the right and sent out to the ball placement portion 520. As described above, since the corner 824 of the projection 822 abuts on the sponge ball 400, the area of the projection 822 in contact with the sponge ball 400 is extremely small, and the sponge ball 400 contacts the projection 822. The frictional charging which arises is suppressed.

  In addition, although the shape of the projecting part 822 is made into the rod shape here, it is not limited to this. The projecting portion 822 may have a shape other than a bar shape. In particular, a plate-like shape having corner portions is preferable because the contact area with the sponge ball 400 can be reduced.

  In addition, the thickness (length in the left-right direction) of the projecting portion 822 is about 1⁄5 of the diameter of the sponge ball 400. The thickness of the projecting portion 822 is not limited to the above length, but if it is too large, the sponge ball 400 following the sponge ball 400 held by the ball holding portion 530 is greatly moved backward in the traveling direction The problem of displacement may occur. In that case, the subsequent sponge ball 400 may be pushed up and lifted up, and may be detached from the rail 700. In order to suppress the occurrence of such a problem, the thickness of the protruding portion 822 is preferably set to 1/3 or less of the diameter of the sponge ball 400.

  In addition, while the protruding portion 822 is rising, the protruding portion 822 can be in contact with not only the sponge ball 400 held by the ball holding portion 530 but also the sponge ball 400 following this. In this case, the projecting portion 822 abuts on the front side portion in the direction of movement of the sponge ball 400 which follows, and ascends, the sponge ball 400 is pulled back in the direction of movement. On the other hand, since the preceding sponge ball 400 held by the ball holding portion 530 is pushed forward by the projection 822 in the advancing direction, these two sponge balls 400 move in opposite directions to each other. As a result, even if electrostatic attraction force is generated between the sponge balls 400, they are separated in opposite directions, and the leading sponge balls 400 can be reliably delivered to the arm type throwing apparatus 100 side. The upper end of the projection 822 sets the amount of push-up of the projection 822 so that the upper end of the projection 822 rises to a position higher than the portion where these two sponge balls 400 contact each other. By setting the thickness of the upper portion 822 or the like, the subsequent sponge ball 400 can be pulled back in the traveling direction as described above. In addition, if the protruding portion 822 is configured to rise so as to cut into two sponge balls, interposing the protruding portion 822 between the two sponge balls 400 can forcibly separate them. The leading sponge ball 400 can be more reliably delivered to the arm type throwing apparatus 100 side.

  The width (length in the front-rear direction) of the protruding portion 822 is appropriately set. However, if the width of the protruding portion 822 is too large, the contact area with the sponge ball 400 will be large, so it is preferable to make it as small as possible.

  Next, the operation of the above-mentioned arm type ball throwing device with a ball feeding device will be described. First, the user places one or more sponge balls 400 on the rail 700 of the ball supply device 600. The sponge ball 400 moves along the slope of the rail 700. At this time, the first sponge ball 400 moves to the ball holding unit 530. The delivery member 820 is at the lower limit position of the movement range, and the sponge ball 400 abuts against the stopper 821 and stops so as to be fitted in the concave surface of the ball holding portion 530 (see FIG. 8).

  The rotation of the motor of the rotation mechanism 300 causes the delivery member 820 to ascend (see FIG. 9). As a result, the stopper 821 is separated from the sponge ball 400 held by the ball holding portion 530, and the projection 822 is lifted with it. The projecting portion 822 pushes up a portion slightly to the left of the lowest portion of the sponge ball 400, whereby the sponge ball 400 is sent out from the ball holding portion 530 to the right.

  As described above, the delivery member 820 contacts the sponge ball 400 at the stopper 821 and the projection 822. Since the sponge ball 400 is in contact with the stopper 821 only by the weight of the sponge ball 400 placed on the rail 700, the stopper 821 is not strongly pressed against the sponge ball 400. Moreover, in the stopper 821, the area of the corner portion 823 in contact with the sponge ball 400 is very small. Therefore, the friction generated between the stopper 821 and the sponge ball 400 is minimized, and the generation of static electricity is suppressed. In addition, although the projecting part 822 comes in contact with the sponge ball 400 by rising, the sponge ball 400 is not restrained and can move freely, so when the projecting part 822 contacts, it escapes upward, and the projecting part 822 is the sponge ball 400. Can not be pressed hard against In addition, the projecting portion 822 contacts the sponge ball 400 only at the corner 824 at the tip. Therefore, friction is also minimized between the projection 822 and the sponge ball 400, and the generation of static electricity is suppressed.

  As described above, the sponge balls 400 are supplied from the ball supply device 600 to the ball placement unit 520. In the ball placement portion 520, the sponge ball 400 moved from the ball holding portion 530 is received by the ball receiving portion 522, and is supported by the two long sides of the frame 521.

  Further, the delivery member 820 is lowered again, and the stopper 821 stops the subsequent sponge ball 400 at the ball holding portion 530. The above operation is repeatedly performed by the rotation mechanism 300, and the sponge balls 400 are supplied to the arm type throwing apparatus 100 one by one.

  The arm 200 and the motion conversion mechanism 810 are both connected to the output shaft of the motor of the rotation mechanism 300 and driven by the motor. Thus, the rotational movement of the arm 200 and the reciprocating movement of the delivery member 820 are synchronized, and one rotation of the arm 200 corresponds to one reciprocation of the delivery member 820. As described above, when the sponge ball 400 is delivered to the ball placement unit 520, the rotational movement of the arm 200 and the delivery member 820 are performed so that the arm 200 is not on the moving path of the sponge ball 400 from the ball holding unit 530. The timing of the reciprocation of is adjusted. Specifically, assuming that the rotation angle of the arm 200 in the horizontal state where the arm 200 is at the position of the ball mounting portion 520 is 0 degrees, the arm is positioned at the upper limit of the moving range. The rotation angle of 200 is set in the range of 90 degrees or more and less than 360 degrees. Immediately after the sponge ball 400 is transferred to the ball placement unit 520, the sponge ball 400 vibrates and the position is not stable. Therefore, in order to stabilize the position of the sponge ball 400 before the arm 200 comes into contact with the sponge ball 400, it is preferable to provide a time for vibration to damp. If the damping time of the vibration is taken into consideration, it is more preferable to set the rotation angle of the arm 200 within the range of 90 degrees or more and 270 degrees or less when the delivery member 820 is positioned at the upper limit of the movement range. .

  The rotation mechanism 300 rotates the arm 200. The longitudinal direction of the crank 220 forms an angle of 90 degrees with the longitudinal direction of the semicylindrical member 210, and when the tip of the crank 220 (connection end with the link 240) faces downward, the semicylindrical member The tip of 210 is directed forward (ie, the rotation angle of the arm 200 is 180 degrees). The tip of the crank 220 is biased downward by the spring 250, but the arm 200 is restricted in rotation in the direction opposite to the rotational direction by the one-way clutch 221, so the tip of the crank 220 is raised from the lower limit position. When the rotation mechanism 300 rotates the arm as described above, the biasing force of the spring 250 increases. The rotation mechanism 300 rotates the arm 200 against the biasing force, and when the tip of the crank 220 faces upward, the biasing force by the spring 250 is maximized. At this time, the semi-cylindrical member 210 is in a horizontal state inside the frame 521 of the ball mounting portion 520, and the rail 211 contacts the sponge ball 400. When the rotation mechanism 300 further rotates the arm 200, the sponge ball 400 is placed on the rail 211. At the same time, the tip of the crank 220 moves forward, and the spring 250 biases the arm 200 in the rotational direction. Since rotation in this direction is not limited by the one-way clutch 221, the arm 200 is rotated at high speed in the rotational direction.

  When the arm 200 is rotated at high speed, the sponge ball 400 rolls on the rail 211 radially outward from the proximal side to the distal side by the centrifugal force. The sponge ball 400 is in contact with two linear rails 211, and the size of each contact area is very small, so the pressure from the sponge ball 400 at each contact area is a certain size or more. Therefore, the sponge ball 400 is prevented from sliding on the rail 211 and rolls reliably. For this reason, the friction between the sponge ball 400 and the rail 211 is minimized, and the generation of static electricity is suppressed.

  The length of the rail 211 is set to 1/3 or more of the diameter of the sponge ball 400, and rolls over the entire length of the rail 211. Thereby, sufficient rotational force is applied to the sponge ball 400. After reaching the tip of the rail 211 by centrifugal force, the sponge ball 400 is ejected forward with the spin applied. Thus, the trajectory of the injected sponge ball 400 is stabilized by injecting the sponge ball 400 after the sufficient rotational force is applied. Therefore, the trajectory of the sponge ball 400 suitable for batting practice or the like of baseball can be obtained. In addition, the effect of lift acting on the sponge ball 400 can be obtained, which enables long throw.

  The spring 250 causes the arm 200 to rotate at high speed in the rotational direction until the tip of the crank 220 points downward. Thereafter, the rotation mechanism 300 further rotates the arm 200 in the rotational direction, and the next sponge ball 400 is ejected by the same throwing operation.

(Other embodiments)
In the embodiment described above, the arm 200 has the semi-cylindrical member 210, and the linear end edges of the semi-cylindrical member 210 are described as the rails 211, but the invention is limited thereto. is not. For example, two wires or rod-like members may be arranged in parallel to form a rail. Further, the uneven structure may be provided on the surface of the rail 211. As a result, the sponge ball 400 is further prevented from sliding on the rail 211, and the sponge ball 400 can be more reliably rolled.

  Moreover, in the embodiment described above, although the configuration in which the stopper 821 and the projecting portion 822 are integrally formed as the delivery member 820 has been described, the present invention is not limited to this. The stopper 821 and the projection 822 can also be configured as separate parts. In this case, while the stopper 821 is in contact with the sponge ball 400, the projection 822 is not in contact with the sponge ball 400, and while the stopper 821 is separated from the sponge ball 400, the projection 822 is sponge ball If the stopper 821 and the projecting portion 822 are interlocked so as to push up 400, the stopper 821 and the projecting portion 822 can be separately driven.

  The ball supply device of the present invention is useful as a ball supply device for supplying a ball to a throwing device used for practicing ball games such as baseball and tennis.

Reference Signs List 100 arm type throwing apparatus 200 arm 210 semi-cylindrical member 211 rail 212 lightening hole 220 crank 221 one way clutch 250 spring 300 rotation mechanism 400 sponge ball 500 mount 520 ball mounting portion 600 ball supply device 700 rail 800 ball feeding mechanism 810 motion Conversion mechanism 820 Delivery member 821 Stopper 822 Protrusions

In order to solve the problems described above, a ball feeding device according to one aspect of the present invention comprises: a rail on which the sponge ball is fed, which is fed to a throwing device that ejects a sponge ball; The sponge ball is stopped by coming into contact with the front side in the direction of movement of the sponge ball, and the stopper is configured to extend the vertical direction by stopping the sponge ball by rising from the lower limit position. Has a corner, and interlocking with the rise of the stopper from the lower limit position, the sponge ball is pushed forward by advancing the sponge ball in the forward direction by pushing up the rear lower portion of the sponge ball in the advancing direction. And a projecting portion for

Claims (6)

A rail on which the sponge ball advances which is supplied to a throwing device which ejects the sponge ball;
A stopper for stopping the sponge ball by coming into contact with the forward side of the sponge ball on the rail in the lower limit position in the advancing direction and for stopping the sponge ball by rising from the lower limit position;
And a projection for feeding the sponge ball forward in the advancing direction by pushing up the rear lower portion of the sponge ball in the advancing direction in conjunction with the rise of the stopper from the lower limit position.
Ball feeding device. And a liftable delivery member integrally formed with the stopper and the projection.
The ball supply device according to claim 1. The stopper has a corner at its lower end, and the corner is configured to contact the sponge ball at the lower limit position.
The ball supply device according to claim 1. The projecting portion has a corner at an upper end thereof, and is configured to push up the lower side in the traveling direction of the sponge ball at the corner.
The ball supply device according to any one of claims 1 to 3. The projecting portion has a length in the traveling direction which is 1/3 or less of a diameter of the sponge ball.
The ball supply device according to claim 4. By raising the projection, the sponge ball following the sponge ball to be fed is configured to be moved rearward in the traveling direction.
The ball supply device according to any one of claims 1 to 5.

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