JPH0334882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In general, the grain discharge device of a combine is such that during reaping work, the upper auxiliary discharge tube is bent by a cylinder along the top of the machine, and when grain is discharged, the auxiliary discharge tube is folded into another cylinder. The auxiliary ejector was tilted upward to form a predetermined angle with the lower main ejector, and then changed its position so that the outlet of the auxiliary ejector faced the carrier's platform.

However, since the grain ejecting device operates two cylinder-like drive devices using separate operating levers, the structure is complicated, resulting in high costs and troublesome operation. If the attitude change operation is performed to bring the discharge port of the auxiliary discharge tube onto the loading platform of the carrier vehicle before the tube reaches a predetermined angle with respect to the main discharge tube, there are problems such as difficulty in positioning the discharge tube.

The present invention aims to improve the above-mentioned drawbacks, and includes providing a discharge spiral in the lower part of the grain tank provided on the machine base, and erecting a main discharge pipe at the end of the discharge spiral. An auxiliary ejection tube is tiltably connected to the upper end of the main ejection tube, and a first drive device for tilting the auxiliary ejection tube with respect to the main ejection tube and a second drive device for converting the auxiliary ejection tube to a discharge working posture are separately provided. In the combine harvester that is operated, an operation switch is provided as a manual operation means for automatically controlling the first drive device and the second drive device of the auxiliary discharge stack, and a switch is provided between the main discharge stack and the auxiliary discharge stack. A sensor for detecting that the auxiliary ejection tube is tilted at a predetermined angle with respect to the main ejection tube is disposed in the auxiliary ejection tube, and when the operation switch is operated to eject the grains, the first drive device and the second drive device are operated.
When the sensor is not detected, the first drive device tilts upward in preference to the second drive device, and when the sensor is in the detection state, the first drive device is stopped and the second drive device is activated. It is characterized by this.

Hereinafter, one embodiment of the present invention will be explained about a combine harvester shown in the drawings. Reference numeral 1 denotes a threshing device mounted on one side of a machine stand 3 having a traveling device 2. In front of it, a reaping device and a grain harvester are mounted. A pre-processing device 4 consisting of a culm conveying device is provided, and on the other side of the machine base 3, an operation panel 5, a pilot's seat 6, a grain tank 7, an engine 8, etc. are arranged in order from the front.

Further, a grain discharge device is attached to the terminal end of the transfer spiral 9 provided at the bottom of the grain tank 7,
The grain discharging device includes a casing 11 rotatably mounted around a circular catch seat 10, a main discharging tube 12 that stands up integrally from the top of the casing 11, and a main discharging tube 12 that is attached to the upper end of the main discharging tube 12 in the front-rear direction. and an auxiliary discharge tube 14 which is tiltably connected by a support shaft 13 of
5 is installed.

The main discharge pipe 12 and the auxiliary discharge pipe 1
Cylinder 16 and cylinder 17 that operate 4
Rams 16a and 17a made of screw rods are inserted into the
The ball 18 fitted in the groove of the screw rod is held down by a spiral 19 screwed into the lower part of the cylinder.
The shaft of the motor 20 serving as a drive device is connected to the shaft of the motor 20, and the first shaft attached to the casing 11 is attached to the lower end of the ram 17a.
The shafts of a motor 21 serving as a drive device are connected to each other, and when these motors 20 and 21 are rotated in forward and reverse directions, the cylinder 16 expands and contracts to open the main discharge tube 12.
The cylinder 17 causes the auxiliary discharge tube 14 to tilt vertically with respect to the main discharge tube 12.

In addition, an auxiliary discharge pipe 14 is provided at the upper end of the main discharge pipe 12.
A detection switch 22 is provided as a sensor, which becomes a detection state (ON) when the grain tank 7 is at a predetermined angle with respect to the main discharge pipe 12, such as when it is connected to the main discharge pipe 12. A return detection switch 23 for detecting that the main ejection tube 12 has returned to the upright position is located in the middle of the front wall, and a limit switch 25 for detecting the tilting limit of the main ejection tube 12 is provided at one lower side of the front wall. A storage detection switch 24 is provided near the top of the other side of the front wall to detect when the auxiliary discharge tube 14 is stored in a substantially horizontal position.

In the above-mentioned apparatus, the grain culm harvested by the reaping device is threshed by the threshing device 1, the waste straw is shredded by a cutter or tied by a knotter, and the sorted grains are processed into grains by a grain lifting machine 26. It is put into tank 7.

Then, when the grain tank 7 is almost full,
Move the aircraft to the side of the road and bring the rear of the aircraft close to the parked truck. At that time, the main discharge pipe 12 stands up as shown by the solid line in FIG. 25 is not detected.

In this state, in the control circuit, as shown in FIG. 5, the detection switch 22 and storage detection switch 24 are open, the limit switch 25 is closed, and the return detection switch 23 is closed to the circuit including the detection switch 22.

Therefore, the operation switch 2 on the side of the operation panel 5
When 7 is inserted into the discharge preparation side (a) in the control circuit,
Since the detection switch 22 is open, the relay R3 is in the state shown in the figure, and since the relay R2 is activated, the motor 21 rotates in the direction (A) and the cylinder 1
7 is extended, the auxiliary discharge tube 14 is pushed up and tilted,
When it is connected to the main discharge pipe 12 as shown by the chain line and the detection switch 22 is turned ON, the relay R3
switches to the left and the motor 21 stops, and at the same time the motor 20 rotates in the direction (A) and the cylinder 1
6, the main discharge tube 12 is tilted to the left in the figure, and the auxiliary discharge tube 14 is turned outward, thereby changing the posture so that the discharge port of the auxiliary discharge tube 14 faces the loading platform of the carrier. conduct,
Since the return detection switch 23 is switched, the motor 2
0 continues to rotate, and when the main discharge tube 12 tilts to the maximum, it contacts the limit switch 25, which opens the limit switch 25, turns off the relay R2, and stops the motor 20. At this time, a back electromotive force is generated in the motor 20, so the motor 20 stops instantaneously.

Furthermore, when the grain ejecting device is set at an intermediate inclination angle, if the operation switch 27 is returned to the neutral position as shown in the figure, relay R2 is turned OFF and the motor 20 is stopped, and in this case as well, Electricity is generated so that the grain ejector remains exactly in the desired position.

When storing the grain discharging device after discharging grains, turn the operation switch 27 to the storage activation side (b), and the storage detection switch 24 is closed, so the relay is activated.
R1 turns ON. At this time, R3 remains switched to the left, so the motor 20 rotates in the (b) direction to return the main discharge pipe 12, and when it comes into contact with the return detection switch 23, the return detection switch 23
switches to the right side, relay R3 turns OFF, motor 20 stops, and at the same time motor 21 rotates in the (B) direction, the auxiliary ejection tube 14 is operated to fall down, and the storage detection switch 24 moves the auxiliary ejection tube 14. When detected and opened, relay R1 turns OFF, and even in this case, even though the weight of the auxiliary ejection pipe 14 is loaded on the cylinder 17, a back electromotive force is generated in the motor 21 to move the auxiliary ejection pipe 14 to a specified position. Stop accurately in position.

Harvesting work may be carried out even after dark, but operating the grain ejection device at that time is extremely dangerous to third parties such as assistants, so a flashing work light is installed above the auxiliary ejector 14. 28 and the switch 29 inserted into the circuit of this working light 28 is attached to the upper rear surface of the grain tank 7 as shown in FIG. Since the grain discharge device blinks while it is moving, it is safe, and the discharge port of the grain discharge device can be easily operated to face the loading platform of the truck, and the loading platform can be illuminated. 30 is a power switch.

Reference numeral 31 in FIG. 4 is a clutch lever, which disengages the clutch of the jumping rotating body 15 at position a shown by a solid line, engages the same clutch at position b shown by a chain line, and tilts the clutch lever 30 to the left in the direction of travel at position b. When the transfer spiral 9 is engaged with the recessed portion of the other receiving arm and tilted to position c, the clutch of the transfer spiral 9 is engaged and the grains are discharged.

As described above, in the present invention, a discharge spiral is provided at the lower part of the grain tank provided on the machine base, a main discharge tube is erected at the end of the discharge spiral, and an auxiliary discharge is provided at the upper end of the main discharge tube. In the combine harvester, in which the tubes are arranged in a tiltable manner, and a first drive device that tilts the auxiliary discharge tube with respect to the main discharge tube and a second drive device that converts the auxiliary discharge tube to a discharge working posture are operated separately. An operation switch serving as a manual operation means for automatically controlling the first drive device and the second drive device of the auxiliary discharge tube is provided, and the auxiliary discharge tube is connected to the main discharge tube between the main discharge tube and the auxiliary discharge tube. A sensor is disposed to detect that the grain is tilted at a predetermined angle, and when the operation switch is operated to eject the grains, the first drive device and the second drive device are operated.
the drive device tilts upward in priority over the second drive device;
Since the first drive device stops and the second drive device operates when the above sensor enters the detection state, the auxiliary ejector in the stored state is raised and tilted to the main ejector in order to eject grains. The process of bringing the auxiliary discharge tube into a predetermined posture, and then the process of changing the posture of the auxiliary discharge tube outward, can all be performed automatically by operating the operation switch, making the grain discharge operation extremely quick and easy. be able to.

Moreover, since the auxiliary ejector of the grain ejector does not tilt outward until it assumes a predetermined position relative to the main ejector, the outlet of the auxiliary ejector can be quickly placed onto the carrier's loading platform. And it can be placed accurately.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention,
Figure 1 is a perspective view of the combine, Figure 2 is a rear view of the grain discharge device, Figure 3 is a sectional view of the lower part of the cylinder, and Figure 4A is a partially cutaway side view of the grain lifting section and operating section. , FIG. 5B is a cross-sectional front view of the clutch lever portion, and FIG. 5 is a control circuit diagram. 7...Grain tank, 12...Main discharge tube, 14...
...Auxiliary discharge pipe, 16, 17...Cylinder, 22
...Extension detection switch, 23...Return detection switch, 24...Retraction detection switch.

Claims (1)

[Claims] 1 A discharge spiral is provided at the lower part of the grain tank provided on the machine base, a main discharge tube is set upright at the end of the discharge spiral, and an auxiliary discharge tube is tiltably connected to the upper end of the main discharge tube. and a combine harvester in which a first drive device that tilts the auxiliary discharge stack with respect to the main discharge stack and a second drive unit that converts the auxiliary discharge stack to a discharge working posture are operated separately, the first drive of the auxiliary discharge stack; An operation switch is provided as a manual operation means for automatically controlling the device and the second drive device, and the auxiliary discharge pipe is tilted at a predetermined angle with respect to the main discharge pipe between the main discharge pipe and the auxiliary discharge pipe. A sensor is disposed to detect this, and when the first drive device and the second drive device are operated to discharge grains,
When the sensor is not detected, the first drive device tilts upward in preference to the second drive device, and when the sensor is in the detection state, the first drive device is stopped and the second drive device is activated. A grain discharging device in a combine harvester characterized by: