JPS6112773Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the opening/closing device of the paddy tank discharge port in agricultural machinery such as combines, and aims to improve work efficiency by simplifying the opening/closing operation, and also improves the reliability of the device by preventing malfunctions. This is to improve the quality of life.

By the way, the discharge port of the paddy tank in this type of agricultural machine is equipped with a shutter, and the shutter is closed when replacing the paddy bag attached to the discharge port to prevent the paddy from flowing out. However, an example of a conventional opening/closing device for this discharge port will be explained with reference to FIG. 1. 1' is a paddy tank, 2' is an opening/closing device for a pair of discharge ports 3' provided at the bottom of the tank, and each of the discharge ports is opened and closed. It is equipped with shutters 4' and 5' that open and close, and each shutter is biased in the discharge port closing direction by a spring (not shown), and is held in the discharge port open position by a locking device (not shown). It is designed to be locked. 6' is a lower discharge port provided below the shutter, 7' is a paddy bag attached to the discharge port, and when the shutters 4' and 5' open the discharge port 3', the paddy tank 1' When the paddy flows into the paddy bag 7' and the bag is full, the operator releases the locking device, and the shutter is moved in the direction of closing the discharge port by the action of the spring, and the shutter is closed. When the rice bag is replaced in this state and the shutter is then pulled to open the discharge port, the shutter is locked by the locking device in that state. However, in such a configuration, the discharge port 3'
When closing the shutter, the worker has to manually release the locking device, which hinders the improvement of work efficiency and poses a risk of the worker's fingers getting caught when closing the shutter. That's what I was doing.

Another conventional example is proposed in Utility Model Application Publication No. 108369/1983. According to this, a shutter is attached to each of the four discharge ports provided in the hopper that stores grains, and each shutter is equipped with a spring that biases the discharge port in the direction of closing the discharge port, and a spring that locks the shutter in the discharge port open position. It is equipped with a locking piece and a solenoid that releases and drives the locking piece. When the bag attached to the tip of the outlet is full of grains, a detection switch installed at the outlet detects this and energizes the solenoid to drive the locking piece and automatically close the shutter. There is. In this case, an independent opening/closing device is provided for each of the discharge ports, and a solenoid or the like is also used, which has the disadvantage that the device becomes large and expensive.

The opening/closing device for the discharge port of the present invention has been developed to eliminate these conventional drawbacks.It is equipped with an electric motor that releases the lock of the shutter installed at the discharge port, and is also equipped with an electric motor that releases the shutter when the paddy bag is full. The system is equipped with a paddy detection sensor that detects the amount of paddy and activates the electric motor, which automatically closes the shutter when the paddy bag is full, improving work efficiency and preventing malfunctions in such cases. The reliability of the device is ensured by providing a configuration that prevents this.

This will be explained below with reference to the embodiment shown in Figs. 2 to 4. In Fig. 2, 1 is a paddy tank, and 2 is an opening/closing device for a pair of discharge ports 3 at the bottom thereof.
Reference numerals 4 and 5 are shutters for opening and closing the outlet in the device, and 6 is a lower outlet connected below the outlet 3. A paddy bag 7 is attached to the outlet, and when the bag is full, A paddy detection sensor 8 is installed to detect when paddy begins to accumulate in the discharge port 3. 9 is the shutter guide plate, 10 is the discharge port 3
It is a shutter guide piece in which a lower discharge port 6 is attached with an opening/closing device interposed in the lower part, and a drive part 11 containing a reducer, a drive converter, etc. is installed in the guide plate 9, and 12 is a drive part 11 for these drives. The electric motor 113 serving as the source is a handle provided at one end of the shutters 4 and 5, respectively. Next, FIG. 3 shows a shutter locking device, in which 14 and 15 are openings formed in the shutters 4 and 5, respectively, and 16 is a spring provided on both sides of each shutter. One end is received by a spring receiver 18 that is integrated with a spring guide 17 that is fixed to the shutter, and the other end is received by a spring receiver 19 that is formed on the shutter guide piece 10 that is a fixed member. When the locking device is released, the shutters 4 and 5 move to positions d and e in Figure 3.
The tension between the lower edge of the shutter guide piece 10 and the flange 20 formed at the upper edge of the lower discharge port 6 shown in FIG. 3 is caused to close from the state shown in FIG. Reference numeral 21 denotes a pair of latches pivotably mounted on the back surface of the shutter guide plate 9, each of which has a U-shaped groove 22 formed at one end thereof, and an end of one arm 23 forming the groove. is equipped with a spring 24 whose one end is fixed to the shutter guide plate 9, and the other arm 25.
A locking groove 26 is formed at the tip thereof, and one end of a swingable locking link 27 is engaged with the locking groove 26. 28 is a spring that biases the link in one direction; 29 is an operating lever pivotably mounted on the upper surface of the shutter guide plate 9; one end thereof is connected to the locking link 27;
A drive shaft 30 that is in contact with the other end and that projects from the drive section 11 is connected to the end. Here, the drive shaft is linearly moved in the direction of the solid line arrow when the electric motor 12 rotates in the normal direction, and in the direction of the dotted line arrow when the electric motor 12 rotates in the reverse direction. Reference numeral 31 denotes a second operating lever that is interlocked with the operating lever 29 via a connecting rod 32, and swings in the directions of the solid and dotted arrows in conjunction with the movement of the drive shaft 30 in the directions of the solid and dotted arrows, respectively. In addition, the second operating lever 31 is also provided with the aforementioned latch 21, locking link 27, etc. 33 is a lock pin protruding from the opposite end of the shutter 4, 5 from the portion where the handle 13 is formed;
As shown in Figure a, when the discharge port is open, it is engaged with the U-shaped groove 22 of the latch 21. Reference numeral 34 denotes a stopper protruding from the opposite end of the U-shaped groove of the latch 21, which together with a contact piece made of phosphor bronze or the like protruding from the back surface of the shutter guide plate 9 through an insulating material constitutes a memory switch 35. However, the switch is closed when the shutter is not in a position where the discharge port is open.

Next, the operation of the discharge port opening/closing device of the present invention will be explained with reference to the electric circuit shown in FIG. 4. First, when the operation switch 36 is turned on in FIG.
The capacitor is charged by current flowing through the diode 40, capacitor 41, and ground. Here, circuits E and F in FIG. 4 correspond to shutters 4 and 5, respectively, and capacitors 41 in both circuits E and F are charged together. In this state, from the paddy tank 2 to the discharge port 3 in Fig.
Assuming that the paddy flows into the paddy bag 7 through the process and that the paddy bag corresponding to the shutter 4 is now full and the paddy detection sensor 8 detects this and closes it, the circuit E in FIG. In the above capacitor 4
1 is discharged and a current flows through the resistor 42, diode 43, transistors 44, 45, bias resistor 46, and the rice grain detection sensor 8, the transistors 44, 45 become conductive, and the relay 47 is activated. Therefore, the contact of the relay switches from X-b to X-a, and as a result, from the storage battery 37 to the contact X-a, the motor 12, and the contact Y.
-c, current flows through the ground, causing the motor to rotate in the normal direction. However, when the electric motor rotates in the forward direction, the drive shaft 30 of the drive unit 11 moves in the direction of the solid arrow as shown in FIG. Similarly, the link 27 and latch 21 are rotated in the direction of the solid arrow.
The engagement state of the locking groove 26 of the arm 25 at is released, and the latch is caused to swing by the spring 24, whereby the lock pin 3 of the shutter 4, which was engaged with the U-shaped groove 22 of the latch, is released.
3 escapes from the U-shaped groove, and the shutter 4 is moved in the direction of the solid line arrow by the spring 16. In this case, the second The operating lever 31 is swung in the direction of the solid arrow, which causes the locking link 2 corresponding to the shutter 5 to
7 and the latch 21 are not released. Furthermore, when the paddy detection sensor 8 corresponding to the shutter 5 is closed, the contact point of the relay 47 in the circuit F in FIG. Therefore, as shown in Fig. 3a, the drive shaft 3
0 moves in the direction of the dotted arrow, the connecting rod 32 and the second operating lever 32 are moved in the direction of the dotted arrow via the operating lever 29, thereby locking the locking link 2 corresponding to the shutter 5.
7 and the latch 21 are disengaged, and the U of the latch is released.
From the groove 22 to the lock pin 3 on the shutter 5
3 escapes and the spring 16 causes the shutter 5 to move in the direction of the dotted arrow.
That is, the operating lever 29, the drive shaft 30, the second operating lever 31, and the connecting rod 32 lock the locking link 27 and the latch 21 on the shutter 4 side when the electric motor 1 rotates in the normal direction.
This constitutes a release means for releasing the engagement between the latch 21 and the locking link 27 on the shutter 5 side when the electric motor 1 is reversed. However, paddy bag 7
If you want to open the discharge port 3 again after replacing the
From the state shown in Figure b, the handle 1 on the shutters 4 and 5
3 and pull it to the right in the drawing, the lock pin 35 protruding from both shutters 4 and 5 will move, coming into contact with the arm 25 of the latch 21 and releasing the spring 24.
When latch 21 is rotated against the
The latch 21 is held in this position because the locking link 27 is engaged with the locking groove 26 of the latch 5 and the locking link 27 is pulled by the spring 28. At this time, the lock pin 33 enters the U-shaped groove 22 of the latch 21 and becomes locked to the arm 32, and both shutters are again set to the state shown in FIG. 3a.

Note that the discharge time of the capacitor 41 is usually 3
It is set to about seconds, so the electric motor stops immediately when the shutter closes the discharge port. However, when the so-called chattering occurs where the paddy detection sensor 8 opens and then closes again due to fluctuations in the paddy level caused by vibrations of the combine harvester, the capacitor is charged again and is discharged when the paddy detection sensor closes, causing the shutter to discharge. The electric motor will start up again after the outlet is closed, but in response to this, the memory switch 35 parallel to the paddy detection sensor 8 closes when the outlet is not open, thereby recharging the capacitor.
This prevents re-discharge and the accompanying restart of the motor. In the circuit shown in FIG. 4, when the operation switch 36 is closed, the storage battery 37 and the switch 3
6, diode 38, resistor 39 in circuit E,
Current flows through the path of diode 40, resistor 42, diode 43, transistors 44, 45, and contact Y-c of relay 47 in circuit F, and as a result, transistors 44 and 45 become conductive, and relay 47 operates, causing the motor to will rotate all the time, but the diode 48 inserted between the transistor 45 and the contact Y-c blocks the flow of current through the above path. ,
This also applies to circuit F. Furthermore, if the paddy detection sensors 8 of the shutters 4 and 5 are closed at the same time, the motor will not rotate, but in response to this, a capacitor 49 is connected between the base and collector of the transistor 45 in circuits E and F. This problem can be solved by connecting timer circuits 51 each consisting of a resistor 50 and setting different time periods for the timer circuits in both circuits E and F.

As described above, the opening/closing device of the paddy tank discharge port in the combine harvester, etc. of the present invention has the above-described structure, so when the paddy bag becomes full, the paddy detection sensor detects this and activates the electric motor automatically. The shutter closes immediately, which significantly improves work efficiency and eliminates operational risks compared to the conventional method of manually releasing the shutter locking device when closing the discharge port. In particular, according to the present invention, malfunctions caused by so-called chattering can be prevented, resulting in a highly reliable opening/closing device. Furthermore, since the pair of discharge ports can be closed by forward and reverse rotation of the electric motor, the number of parts can be reduced accordingly, and there is no need to increase the size of the electric motor.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a conventional discharge port opening/closing device, Fig. 2 is an overall perspective view of the opening/closing device of the present invention, and Fig. 3 is a schematic diagram of a conventional discharge port opening/closing device.
Figure a is a plan view of the main part with the discharge port open, figure b
is a plan view of the state with the discharge port closed, c is a front view of the state of a, d and e are A-B at a, respectively.
FIG. 4, a sectional view taken along line CD, is an electrical circuit diagram of the switchgear of the present invention. 1...Paddy tank, 2...Opening/closing device, 3...Discharge port, 4, 5...Shutter, 8...Paddy detection sensor, 12...Electric motor, 16...Spring, 21
... Latch, 27 ... Locking link, 29, 31 ...
...Operation lever, 33...Lock pin, 35...Memory switch, 41...Capacitor, 44,
45...Transistor, 47...Relay, 48
...Diode, 51...Timer circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A shutter for opening and closing a pair of discharge ports, a spring for biasing each shutter in the closing direction, and a lock pin protruding from each shutter. , a pair of swingable latches that engage with each lock pin in the shutter open position, a pair of locking links that engage each latch and hold the lock pin in the engaged position, and an electric motor that rotates in forward and reverse directions. and a release means for disengaging one of the locking links and the latch when the motor rotates in the forward direction and disengaging the other locking link and the latch when the motor rotates in the reverse direction, and a release means that disengages the engagement between the locking link and the latch on one side when the electric motor rotates in the forward direction, and a release means that disengages the engagement between the locking link and the latch on the other side when the motor rotates in the forward direction, and a release means provided at each discharge port that disengages the engagement between the locking link and the latch on one side when the motor rotates in the forward direction. A combine harvester, etc., characterized in that it is equipped with a paddy detection sensor that detects this and closes it, and an electric circuit that rotates the motor in the forward direction when one paddy detection sensor closes, and rotates the motor in the reverse direction when the other paddy detection sensor closes. An opening/closing device for the discharge port of a paddy tank. (2) A timer circuit is provided to rotate the electric motor for a certain period of time when the paddy detection sensor is closed, and an electric circuit is provided in which a memory switch that closes when the shutter is in the closed position is connected in parallel to the paddy detection sensor. Claim 1: An opening/closing device for a paddy tank discharge port in a combine harvester, etc. as claimed in claim 1. (3) When the paddy detection sensor closes, the capacitor discharges and the transistor becomes conductive, which closes the relay contacts and rotates the motor. A pair of circuits are used for forward and reverse rotation of the motor. A combine harvester, etc. according to claim 1 or 2 of the utility model registration claim, characterized in that the electric circuit is equipped with a diode that does not make the transistor conductive except when the capacitors in both circuits are discharged. Opening/closing device for the discharge port of the paddy tank. (4) By adding timer circuits with different set times to the forward and reverse rotation circuits of the motor, the motor can be made to perform forward and reverse rotation sequentially even if the paddy detection sensors at both discharge ports are closed at the same time. An opening/closing device for a paddy tank discharge port in a combine harvester, etc., as set forth in claim 1 or 3 of the registered utility model claim, characterized by: