JPS6141548Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a shutter opening/closing device installed at the discharge port of a paddy tank in an agricultural machine such as a combine harvester, and aims to improve work efficiency by automating the opening and closing of the shutter. .

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, if the conventional opening/closing device for this discharge port is explained with reference to FIG. 1, 1' is a paddy tank;
2' is a discharge port provided at the bottom, 3' is a paddy bag attached to the discharge port, and the discharge port is equipped with a shutter 4'. 5' is a solenoid that locks the shutter in the open position of the discharge port, and 6' is a paddy detection sensor installed above the discharge port, which operates to release the lock of the solenoid when a certain level of paddy is detected. Furthermore, the shutter is biased in the direction of closing the discharge port by a spring (not shown). In the above configuration, the shutter 4' is now opening the discharge port 2', and when the paddy flows from the paddy tank 1' into the paddy bag 3' and the bag becomes full, the paddy detection sensor 6' detects this. By detecting this and releasing the lock of the solenoid 5', the shutter 4' is moved by the spring in the discharge port closing direction, and the paddy bag 3' is replaced with the discharge port 2' closed. After that, when the shutter 4' is manually moved in the direction of opening the discharge port against the spring, the discharge port 2' opens, and in this state the shutter 4' is locked by the solenoid 5'. This means that work can be resumed. However, in such a configuration, it is troublesome that the shutter 4' must be opened manually, and in this case, a large force is required to counteract the spring force, resulting in very poor workability. In addition, when a paddy tank has multiple discharge ports, the above-mentioned solenoid etc. must be installed for each discharge port and operated for each one, which makes the structure extremely complicated and makes the operation extremely difficult. It becomes troublesome.

The present invention was made to solve these conventional drawbacks.By equipping the paddy tank discharge port with an electric motor for opening and closing the shutter, when the paddy detection sensor detects that the paddy bag is full, The electric motor closes the shutter, and
After replacing the paddy bag, when the reverse command switch is turned on, the electric motor is reversed and the shutter is opened.This automates the opening and closing operations of the shutter and improves work efficiency. Even when a plurality of discharge ports are provided, the electric motor opens and closes the shutters of each discharge port at the same time, thereby simplifying the configuration, facilitating assembly, and reducing costs.

Hereinafter, the discharge port opening/closing device of the present invention will be explained with reference to the embodiment shown in FIGS. 2 to 6. In FIG. This is a paddy bag placed below the discharge port. 4 is a shutter 6 equipped at each outlet
is a paddy detection sensor installed above the discharge port in the paddy tank, and a handle 7 is provided in front of the shutter, and a push button 8 is attached to the handle. It is said that it is possible to move within. Reference numeral 10 indicates a support plate for a shutter opening/closing mechanism, which will be described later. Reference numeral 11 indicates a case of a shutter drive device, which is fixed between support plates 10 and 10 on both sides with brackets 12, 12. Inside the case, an electric motor 13, a reduction gear 14, etc. are installed. is equipped and closed with a cover 15. A shutter 4 is interposed below the discharge port 2, and a discharge port guide cylinder 16 is connected by a connecting plate 17 fixed to the side of the lower end of the discharge port 2, and 18 in the figure is a discharge port. It is a guide board. Next, the drive device and opening/closing mechanism of the shutter will be explained with reference to FIG. 3.
3 is the above-mentioned electric motor, 14 is the above-mentioned speed reducer that reduces the rotation of the electric motor, and 19 is the above-mentioned case 1.
A slide shaft is pivotally supported on both sides of the shaft and is slidable. A rack 20 is formed in the center of the shaft, and a pinion 21 attached to the output shaft of the speed reducer 14 meshes with the shaft to reduce the speed. It forms an exchange mechanism for converting the rotary motion of the machine into linear motion, and first and second inclined surfaces 22 and 23 are formed at both ends of the rack forming portion of the shaft as shown in FIG. The first and second
First and second limit switches 24 and 25 disposed near the inclined surfaces 22 and 23 are connected to the slide shaft 19.
By sliding the lever, the lever can be opened and closed depending on whether or not a lever is pressed on the inclined surface.
Here, when the slide shaft slides in the direction of the solid line arrow (shutter closing direction), the first limit switch 24 is pressed against the first inclined surface 22 and its contact opens, and the second limit switch is moved in the direction of the dashed line of the slide shaft. The lever is pressed against the second inclined surface 23 by sliding in the shutter opening direction, and the contact is opened. That is, the first and second inclined surfaces 22 and 23 form the operating mechanism of the first and second limit switches 24 and 25. 26 is an L-shaped link rotatably pivoted to the support plate 10 of the opening/closing mechanism to change the direction of movement;
Reference numeral 27 designates one arm of the link, which is rotatably connected to one end of the slide shaft 19 via a connecting culm 28, and an elongated hole 30 is formed at the end of the other arm 29, into which a slotted hole 30 is formed. A pin 32 of a locking device 31 attached to the shutter 4 is inserted through it. Here, θ in the figure indicates the swinging range of the arm, and the ends of the slide shaft 19 at both ends of the connecting culm 28 and each connecting part with the arm 27 are equipped with spherical bearings as shown in FIG. 33 is used. In this way, the shutter 4 moves in a direction perpendicular to the slide shaft 19. Further, numeral 34 in the figure is a coupler for connecting the cord of the limit switch. Although not shown, a similar shutter opening/closing mechanism is also provided on the right side of the slide shaft 19 via a connecting culm. Next, to explain the electric circuit of the switchgear shown in FIG. 6, 6 is the above-mentioned rice grain detection sensor, 13 is the electric motor, 24 and 25 are the above-mentioned first and second limit switches, 35 is the storage battery, 36, Reference numerals 37 denote first and second relays connected in series to the input sides of the first and second limit switches, respectively; when the first relay 36 is energized with current, the contact B-c switches to B-d; Second
When the relay 37 is energized, the control point C-f changes to C-.
Switch to e. Reference numeral 38 denotes a reverse rotation command switch for the electric motor, which can selectively connect the input side contact A on the power supply side to the input side terminals a and b of the first and second relays by manual operation.

Next, the operation of the opening/closing device will be explained. In a state where a paddy bag 3 is provided below each discharge port 2 in the paddy tank 1 and the shutter 4 opens the discharge port 2, paddy is transferred from the paddy tank 1 to the paddy bag. 3 and the bag becomes full, paddy begins to accumulate in the paddy tank 1, the paddy detection sensor 6 shown in FIG. 6 closes, and at that point the first limit switch 24 closes; 24 is closed, current flows from the storage battery 35 through the sensor 6, the first relay 36, and the limit switch 24, so that the contact of the first relay changes from B-c to B-.
d, the electric motor 13 is energized, which causes the electric motor to rotate in the forward direction, and the third
Reducer 14, slide shaft 19, and connecting culm 2 shown in the figure
8. The shutter 4 is moved in the direction of closing the discharge port 2 via the L-shaped link 26, and the discharge port is in the closed state shown in FIGS. 2 and 3.
In this case, the lever of the first limit switch 24 is pressed against the first inclined surface 22 of the slide shaft 19, thereby opening the switch 24,
The rotation of the electric motor is stopped, and the lever of the second limit switch 25 is moved to the second inclined surface 2.
3, the switch closes. However, if the rice bag 3 is replaced with the discharge port 2 closed in this manner and the contacts A-b of the reverse rotation command switch 38 shown in FIG. 2 relay 37 is energized and contacts C-f to C-e
As a result, current flows in the opposite direction to the electric motor 13, causing the electric motor to rotate in reverse, and the slide shaft 19 moves in the direction of the dashed arrow through the reducer 14, pinion 21, and rack 20 shown in FIG. At the same time, the L-shaped link 26 is further rotated via the connecting culm 28, and the shutter 4, which is connected to the arm 29 of the link via the locking device 31, is similarly moved in the direction of the dashed arrow. Thus, the discharge port 2 is opened. Furthermore, the 6th
Contact point A- in the reverse rotation command switch 38 shown in the figure.
In case a, when the shutter 4 is moving in the closing direction of the discharge port 2 as the paddy detection sensor 6 closes, the shutter stops due to the sensor 6 opening due to fluctuations in the paddy level in the paddy tank, etc. By manually connecting the contact point A-a, the shutter is moved in the discharge port closing direction again. Further, the push button 8 shown in FIGS. 2 and 3 allows the shutter to be opened and closed manually by releasing the engagement between the L-shaped link 26 and the locking device 31.

As described above, the opening/closing device for the paddy tank discharge port in the combine harvester, etc. of the present invention is equipped with an electric motor that moves the shutter at the discharge port, and detects when the paddy bag is full and switches the electric motor to discharge the paddy tank. The system is equipped with a paddy detection sensor that rotates the outlet in the closing direction, a reverse command switch that manually reverses the motor to open the discharge port, and a limit switch that stops the motor at a predetermined position, so the operation to close the discharge port is automatic. In general, the discharge port can now be opened by simply flipping a switch, which significantly improves work efficiency compared to the conventional method of opening the shutter manually and against spring force. In addition, especially according to the present invention, even when a paddy tank is provided with a plurality of discharge ports, the shutters of each discharge port can be operated simultaneously by one set of drive devices, thereby further improving work efficiency. Furthermore, the simplified configuration has the effect of facilitating assembly and reducing costs.

In addition, a slide shaft that converts the rotary motion of the reducer into linear motion, an L-shaped link that converts the direction of motion, and a connecting culm that connects the slide shaft and the L-shaped link are provided to move the shutter in a direction perpendicular to the slide shaft. Since the slide shaft is moved in the axial direction, a load is applied to the slide shaft in the axial direction, but almost no load is applied in the direction perpendicular to the shaft, so the slide shaft does not bend and can be made that much thinner. Further, since the slide shaft only moves in the axial direction and the entire slide shaft does not move in a direction perpendicular to the shaft, this is advantageous in terms of space.

[Brief explanation of drawings]

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.
The figure is an enlarged perspective view of the main part, and Figures 4a and 4b are individual perspective views of the slide shaft in the opening/closing device of the present invention, and
5A and 5B are a plan view and a sectional view of the spherical bearing portion, and FIG. 6 is an electric circuit diagram of the switchgear of the present invention. 1 is the paddy tank, 2 is the discharge port, 4 is the shutter,
6 is a paddy detection sensor, 13 is an electric motor, 14 is a speed reducer, 19 is a slide shaft, 24, 25 are limit switches, 26 is an L-type link, 28 is a connecting culm, 38
is the reverse command switch.

Claims (1)

[Claims for Utility Model Registration] (1) An electric motor that operates in forward and reverse directions, a reducer that decelerates the electric motor, a conversion mechanism that converts the rotational motion of the reducer into linear motion, and a mechanism that converts the rotational motion of the motor into linear motion. A slide shaft provided with an actuation mechanism for two limit switches to stop it, an L-shaped link connected to the slide shaft via a connecting culm to change the direction of movement, and the slide connected to the L-shaped link. A shutter that moves in a direction perpendicular to the shaft to open and close multiple discharge ports, a paddy detection sensor that detects when the amount of paddy in the paddy tank exceeds a certain level and rotates the electric motor in the normal direction, and a manual operation. An opening/closing device for a paddy tank discharge port in a combine harvester or the like, characterized in that it is equipped with a reverse command switch for reversing the electric motor. (2) A conversion mechanism consisting of a rack provided near the center of a slide shaft that meshes with a pinion provided on the output shaft of the speed reducer, and a first rack formed at both ends of the rack and arranged near the rack. 2. The opening/closing device according to claim 1, which is a registered utility model, and further comprises an operating mechanism comprising first and second inclined surfaces for pressing the second limit switch to open the circuit. (3) One end of the connecting culm is rotatably connected to the slide shaft, and the other end of the connecting culm is rotatably connected to one arm, and the other end is rotatably connected to the other arm through the elongated hole provided near the end. 3. The opening/closing device according to claim 1 or 2, which is a registered utility model, characterized in that the shutter opening/closing mechanism includes a shutter opening/closing mechanism having an L-shaped link into which a pin of a locking device attached to the shutter is inserted.