JPS6213643Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ball sending device for a tennis pitching machine, and is intended to ensure that balls stored in a ball receiving section such as a hopper can be delivered one by one to an ejection mechanism. .

The illustrated embodiment will be described below.

Reference numeral 1 denotes a housing, which, as shown in Fig. 4, has the shape of a vertically long rectangular parallelepiped box, houses a pair of upper and lower rotors 2 and 2' serving as an injection mechanism, and has a ball convergence hopper 3 mounted on the upper side. , is pivotally supported on a machine frame 5 that is pivotally supported on a base 4.

6 is the rotor 2 on the left side of the housing 1;
The rotors 2 and 2' are rotated in opposite directions by separate motors (not shown) through an injection hole formed in a position corresponding to the opposing portion of the rotors 2', and the balls sandwiched between them are rotated. Injection is made through this injection hole 6.

The base 4 has a rectangular box shape, supports wheels 7 (the one on the right side is not shown) 7 on the rear left and right sides, and has a handle 8 on the top surface.

The machine frame 5 has an L-shaped side surface, and has a short side portion 5a pivotably supported on the base 4 so as to be horizontally pivotable, and a rear center portion of the housing 1 is vertically pivotably supported on the front side of the long side portion 5b. It is pivoted.

The ball collecting hopper 3 is provided with an input port 9 at the top thereof,
The outlet 11 is provided with a guide plate 10 at the bottom and a pulsator (not shown).
is opened in the upper right side part of the housing 1, and by rotation of the pulsator, the balls are delivered one by one to the second waiting part 13 of the first and second waiting parts 12, 13 provided in the upper right side part. It is something.

The first and second standby sections 12 and 13 are provided with a guide plate 1
4 and 15.

The guide plate 14 has a substantially rectangular shape, and is installed on a support frame 16 horizontally suspended in the upper right side of the housing 1, with its longitudinal direction facing forward and backward, and extends the required width of the upper edge of the approximately central portion diagonally upward to the left. The upper side of the inclined part 14a formed by bending as shown in FIG.
A letter-shaped notch 14b is formed.

The guide plate 15 has a front side part 15a and a central part 1.
5b is vertical and forms an L-shape in plan, the rear side portion 15c is inclined diagonally forward and downward to form a square in plan, and the upper edges of these parts are continuous and form a U-shape in plan. The guide plate 15 has a front side portion 15.
a substantially rectangular support plate 16' with the tip of a pointing to the left from the front end of the guide plate 14 on the support frame 16;
The tip of the rear part 15c is fixed to the right side of the guide plate 14 with a screw 17', so that the central part 15b faces parallel to the guide plate 14, and the rear part 15c is fixed to the right side of the guide plate 14 with a screw 17. A dropout port 18 is located below and in front of the outlet 11, and the space above the dropout port 18 forms the first standby part 12, and the space above the rear side part 15c forms the first standby part 12. 2 standby section 13 is formed.

The first and second standby parts 12 and 13 have a size that accommodates one ball 19 and 20, respectively,
The notch 14b of the guide plate 14 is connected to the first standby section 12.
At the same time, a guide passage 21 (only the upper part is shown) is provided below the descent port 18 for guiding the ball to the right opposing portion of the rotors 2, 2'.

22 is a first locking part body that locks the ball 19 in the first standby part 12;
2a and a flat plate-like short side part 22b, and the substantially center of the long side part 22a is rotatably supported on a shaft 23 extending horizontally on the rear side of the support plate 16'. , the short side part 22b passes through the lower side of the guide plate 14 and is located approximately at the center of the descent port 18, and the short side part 22b comes into contact with the lower surface of the ball 19 and locks at the locking position (solid line in FIG. 2). It is supported so as to be displaceable to a non-latching position (dashed line in the figure) located below and outwardly of the opening 18 and releasing the locking of the ball 19.

Solenoid 24 installed on the rear side of support plate 16'
connects the tip of the plunger 25 to the first locking body 2
The first locking body 22 is pivotally connected to the long side 22a of the first locking member 22 by a shaft 26, and is moved to a non-locking position against the bias of a spring 27, which will be described later.

Reference numeral 28 denotes a second locking part body that locks the ball 20 of the second standby part 13, which has an L-shaped contact part 28b integrally formed on the lower right side of the elongated base part 28a with a U-shaped cross section. , the upper end of the base 28a is rotatably supported on a shaft 29 horizontally suspended above the shaft 23, and the contact portion 28b is positioned in the second standby portion 13 through the notch 14b of the guide plate 14. and the locking position (second
(dashed line in the figure) and a non-locking position (solid line in the figure) where the ball 20 is unlocked by being located inside (on the left side) of the notch 14b. Also, the lower end of the base 28a of the second locking body 28 is connected to the first
The tension spring 27 is engaged with and connected to the inside of the upper end portion of the long side portion 22a of the locking portion body 22, and is stretched between the pin 30 horizontally suspended on the rear surface of the support plate 16′ and the base portion 28a. Therefore, the second locking part body 28 is urged to be displaced to the non-locking position, and in conjunction with this, the first locking part body 22 is urged to be displaced to the locking position, and the long side The upper end of the portion 22a is engaged with a stopper pin 31 horizontally suspended on the support plate 16' and held in the locking position, whereby the second locking part body 28 is also held in the non-locking position. be.

Thus, when the ball 19 is locked in the first standby part 12, the lower front side of the ball 20 is in contact with the upper part of the ball 19, and the lower rear side is connected to the guide plate 15.
It is in contact with the inclined surface of the rear side portion 15c and is waiting there.

Therefore, when the solenoid 24 is energized, the first locking body 22 is pulled by the plunger 25 and rotates clockwise (FIG. 2) and is displaced to the non-locking position. The member 28 rotates counterclockwise (as shown in the figure) and is displaced to the locking position, and the unlocked ball 19 passes through the descent port 18 and moves into the guide passage 2.
1 and is sent out to the rotors 2, 2', and the ball 20 is brought into contact with the abutting part 28 of the second locking part body 28.
b and is latched to the second standby part 13.

Thus, when the solenoid 24 is de-energized after the ball 19 has descended, the first and second locking members 2
2 and 28 return to their original positions by the bias of the tension spring 27, and the ball 20, which is released from the lock by the second locking body 28, rolls by itself and is displaced to the first standby part 12. , and is locked to this part by the first locking part body 22, and a new ball is fed from the ball collection hopper 3 to the second waiting part 13 and is placed on standby.

As is clear from the above, according to the present invention, the first locking member and the second locking member are interlocked by a solenoid, and the first locking member is displaced to the non-locking position and the second locking member is moved to the non-locking position. When the ball in the first standby section is unlocked and the ball descends to the injection mechanism, the second locking body moves to the locking position and locks the ball in the second standby section to the part. By doing this, for example, it is possible to reliably send the balls that are continuously fed from the ball hopper to the injection mechanism one by one, and also to adjust the interval at which the balls are sent to the injection mechanism by a simple operation of controlling the excitation of the solenoid. In other words, the pitching interval can be adjusted arbitrarily.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cutaway plan view showing the housing and the ball collecting hopper;
2 and 3 are longitudinal sectional views taken along the line and - line in FIG. 1, and FIG. 4 is a perspective view of a tennis pitching machine equipped with the ball throwing device of the present invention. 2, 2'... Rotor serving as the injection mechanism, 18...
Descent port, 12...first standby part, 13...second standby part, 22...first locking part body, 28...second locking part body, 27...tension spring, 24...solenoid.

Claims (1)

[Scope of utility model registration request] A first waiting section for waiting one ball above the drop opening for sending the ball to the injection mechanism, and a second waiting section that is continuous and inclined diagonally upward from the first waiting section, and the first waiting section is provided. The locking part body is pivotably supported so as to be movable between a locking position where the locking part body abuts the lower side of the ball located in the first standby part and locking at that position, and a non-locking position where the locking is released. , a second locking part body is placed above the first locking part body, and a locking position where the second locking part body contacts the lower side of the ball located in the second standby part and is locked at that position; The first locking part body and the second locking part body are connected to each other so that the first locking part body is moved to the second locking position and the first locking part body is moved to the second locking position. The body is biased by a spring so as to move in conjunction with the unlocked position, and a solenoid is connected to the first locking body, and the solenoid moves the first locking body to the unlocked position. A ball throwing device for a tennis pitching machine, characterized in that when the second locking member is displaced, the second locking member is displaced in conjunction with the locking position.