JPS589918Y2 - Grain tank outlet shutter opening/closing device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shutter opening/closing device for a discharge port of a grain tank.

2. Description of the Related Art For example, in agricultural machinery such as a combine harvester, a device for automatically opening and closing a shutter for opening and closing the discharge port of a grain tank is known, in which a motor is linked to the shutter.

However, in the automatic opening/closing device as described above, due to the locking function of the motor, it is impossible to manually open/close the shutter, which is connected to the motor drive shaft.

By improving this point, we proposed a switchgear that is equipped with a disconnection means linked to the operation of the button so that the shutter can be opened and closed manually by separating the shutter and the motor in order to respond to abnormalities in the switchgear. has been done.

The device according to this proposal has a fan-shaped gear that meshes with a pinion fixed to a drive shaft of a motor, and uses an opening/closing arm that rotates in conjunction with the rotation of the pinion to open/close a lock pin attached to a shutter. The shutter is opened and closed through engagement with the arm, and the lock pin and the opening/closing arm are disconnected from each other by a disconnecting means by operating a bushing button, allowing manual operation.

However, in such a configuration, when the lock pin is disengaged and the shutter is manually opened/closed, the relative position of the opening/closing arm and the lock pin changes, so in order to switch to automatic opening/closing using the motor, the lock pin must be opened/closed. In order to engage the arm, it is necessary to locate the opening/closing arm, move the shutter to the corresponding position, and engage the lock pin.

Furthermore, if the motor is driven with the lock pin disengaged from the opening/closing arm, only the opening/closing arm will rotate, resulting in interference between the opening/closing arm and the lock pin, resulting in damage or the shutter not moving. .

This idea was made to solve the above-mentioned problem, and involves engaging the shutter opening/closing motor and the shutter with a rack and pinion, and also engages or separates the rack and pinion by operating a button. Accordingly, it is an object of the present invention to provide a shutter opening/closing device that can easily and quickly switch between opening/closing by motor drive and manual opening/closing.

An embodiment of this invention will be described below with reference to the drawings.

In the figure, 1 is a grain tank installed in the combine, 2
is a shutter that opens and closes the discharge port 3 at the bottom of the grain tank 1;
4 is a handle for opening and closing the shutter 2, and 5 is a collection bag installed under the discharge port.

The shutter 2 is operated by the rotation of the monitor 6 or manually by means of a pinion 7 attached to the drive shaft of a motor 6 mounted on a suitable frame, and a rack 8 that is removably engaged with the pinion 7. It moves in the direction A'15 and opens and closes the discharge port 3.

The rack 8 is placed on the shirt shirt plate 2a via a cam plate 13 along a side wall 9 formed in a KL shape at one side edge of the shirt shirt plate 2a, and has a pin 10a projecting upward from the shirt shirt plate 2a. , 10b so that the rank 8 and the shirt shirt plate 2a can move together in the A--A direction.

A spring 11 is fitted into the pins 10a and 10b, and its lower end contacts the upper surface of the rank 8, and its upper end contacts the lower surface of the cover 12 (FIG. 3) covered with the shirt shirt plate 2a. Due to the repulsive force of the spring 11,
The rack 8 is biased downward and engaged with the pinion 7.

There is a cam plate 13 between the rank 8 and the shirt plate 2a.
is interposed, and this cam plate 13 is connected to the shirt plate 2.
(a) Extends along the upper surface, is connected to the button 14 provided on the handle 4, and forms a gentle slope in the direction of arrow A (in this embodiment, the direction to close the shutter) directly below the rack 8. A chevron-shaped cam is, is' is formed, and this cam i
s and is' are fitted into recesses 16 and 16' formed on the lower surface of the rank 8 in a shape similar to the cam 15 described above.

When the cam plate 13 moves in the direction A, the rank 8 is pushed up by the cams i s and i s', and the rack 8 and pinion 7 are disengaged from each other.

The sliding plate 13 has elongated holes 17 at two places, and the pins 10a and 10b are fitted through the elongated holes 17 of the cam plate 13 and the father to regulate the sliding direction of the cam plate 13.

The bush button 14 is fitted into a recess formed at one end of the handle 4 so as to be slidable in the A-A direction, and a spring 18
It is normally urged to automatically return in the A' direction by the repulsive force of .

In the shutter opening/closing device configured as described above, when the bushing button 14 is not pressed, the cam plate 13 is moved to the recess of the rack 8 by the return force of the spring 18, as shown in FIG. It has returned to the position where it was inserted.

The rank 8 is pushed down by the repulsive force of the spring 11, and the rack 8 and the pinion 7 of the motor 6 are engaged.If the motor 6 is rotated in either the forward or reverse direction, the rank 8 will move from A to A. ' move in either direction and release shutter 2.
Since these are connected via pins 10a and 1ob, the shutter 2 can be opened and closed by rotating the motor 6.

On the other hand, when manually opening and closing the shunter 2, when the bushing button 14 is pushed in the direction A, the cam plate 13 also moves in the same direction, and the cams 15 and 15' move into the recesses 16 of the rack 8.
, 16', and as a result, rank 8 is pushed upward along pins 10a*10b while resisting the repulsive force of spring 11.

Then, rank 8 comes off pinion 7 and is attached to shirt plate 2.
a and the motor 6 are separated.

Then, when the handle 4 is pulled in the A direction, the shutter 2 is manually opened, and when the housing handle 4 is pushed in the A direction, the shutter 2 is closed.

When the force pushing the button button 14 is removed, the button button 14 is pushed in the direction A' by the repulsive force of the spring 18, and the cam fly 13 is also pushed in the direction A', and the cams 15 and 15' are pushed in the direction A'. The rack 8 enters directly below the recesses 16° and 16', and the rank 8 is pushed down by the repulsive force of the spring 11, and the rack 8 and pinion 7 engage, allowing the motor 6 to open and close the shutter.

As detailed above, according to this invention, in the grain tank shutter opening/closing device, the shutter can be opened and closed automatically and manually by engaging or disengaging the pinion that is interlocked with the motor and the rank attached to the shutter plate. Since the switching is made, the rank and pinion can be engaged at any position, and switching between automatic opening/closing and manual opening/closing can be easily and reliably performed regardless of the opening/closing position of the shutter.

Furthermore, even if the teeth of the rack and pinion overlap and do not mesh, if the motor is rotated a little, they will automatically mesh, making switching between automatic and manual even more reliable.

Furthermore, the switching mechanism is simple and inexpensive because it is possible to switch between automatic and manual mode by simply shifting either the rank or pinion in one direction.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of this invention, Fig. 2 is a plan view showing the main parts of the embodiment of Fig. 1 with a part of the cover cut away, and Fig. 3 is a perspective view showing an embodiment of the invention. FIG. 4 is an enlarged view of the rank pinion portion of FIG. 2, with the punch button portion cut away. 1...Grain tank, 2...Shutter,
3...-discharge port, 4...handle, 5...
...Collection bag, 6...Motor, 7...
Pinion, 8...Rank, 10a, 10b...
...-9AU wall, 11...spring, 13
...Cam plate, 14 ... Button, 15 ... Cam, 16 ... Recess, 17 ... Long hole, 18 ······spring.

Claims (1)

[Scope of Claim for Utility Model Registration] In a shutter opening/closing device in which a discharge port provided at the bottom of a grain tank is opened and closed by a shutter plate driven by a motor, a pinion that rotates in conjunction with a motor shaft and a shutter plate are provided. a rank extending in the opening/closing direction of the shirt flap plate and movable in a direction perpendicular to the opening/closing direction of the shirt flap plate, and releasably engaging the pinion; and a rank attached in the direction of engaging the pinion. and a cam plate equipped with a cam mechanism that moves the rank in a direction away from the pinion in conjunction with the operation of the operating member, and automatically opens and closes by engaging or disengaging the rack and pinion. A shutter opening/closing device for a discharge port of a grain tank, characterized in that it can be switched between manual opening and closing.