JPS5848137B2 - Grain culm height detection device in combine harvester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grain culm height detection device in a combine harvester.

The grain culm height detection device in a conventional combine harvester is configured such that the detector itself for detecting the culm height of the transported grain culm can be moved and fixed at any position in the culm direction depending on the culm height of the grain culm to be detected. Therefore, there are disadvantages in that it takes time to adjust, and that the adjustment position varies depending on individual differences between combine harvester operators, making it impossible to appropriately detect the culm height.

The present invention was devised to eliminate the above-mentioned conventional drawbacks, and the detector itself for detecting the culm height of the transported grain culm does not need to be moved or adjusted to any position in the culm direction of the grain culm. It consists of an upright rice detector and a lodging detector installed at different positions, and these detectors can be selectively switched for exceptional operation, so that switching does not take much time and is easy for the combine operator to operate. It is an object of the present invention to provide a grain culm height detection device for a combine harvester that can eliminate adjustment errors due to differences.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, 1 is a main frame of a combine harvester, and a reaping part 2 is provided at the front part of the main frame 1, and a reaping part 2 is provided at the rear thereof. A threshing section 3 is provided.

Reference numeral 4 denotes a cutting blade of the reaping section 2, and the cutting blade 4 is provided in the lower part of the reaping section 2 in the lateral direction.

Further, reference numeral 5 denotes a cutting culm horizontal conveying body installed directly above the cutting blade 4, which runs from the conveyance end position of the cutting culm horizontal conveying body 5 toward the rear upper threshing section 3, and extends in the direction of movement of the machine body. Along the axis 7, the grain culm holding stock origin conveyor 6 which pinches the stock origin of the grain culm
By changing the inclination angle of the grain culm holding stock former conveyor 6, the relative position of the inherited part of the conveyor can be changed to increase the handling depth of the grain culm. It is designed to adjust the brightness.

Furthermore, above the grain culm holding stock former conveyance body 6, a terminal portion extends rearward for a longer time than the terminal end of the grain culm pinching stock former conveyance body 6, and is substantially parallel to this, to convey the grain culm stem portion. A body 8 is constructed.

Reference numeral 9 denotes a grain culm automatic feeding device of the threshing section 3, and between the starting end of the grain culm automatic feeding device 9 and the terminal end of the grain culm nipping stock source conveyor 6, a grain culm supply conveying body 10 is provided in the front and rear direction. It is constructed in a substantially horizontal manner.

On the other hand, reference numeral 11 denotes a handling depth adjustment drive mechanism of the grain culm holding stock source transport body 6, and the handling depth adjustment drive mechanism 11 screws a movable body 13 into a vertical reciprocating rotary screw rod 12. The moving body 13 and the grain culm holding stock source conveyor 6 are connected by a connecting arm 15, and the screw rod 12 is connected to a forward/reverse drive motor 14.

In addition, the grain culm conveyance route of the grain culm holding stock former conveyance body 6 includes:
A culm height detection device 16 for detecting the culm height of the grain culms to be transported is provided at a position corresponding to the transport end position, and a culm height upper sensor 17, a lower culm height sensor 18, and Each intermediate sensor 19 is provided.

That is, each of the above-mentioned sensors 17, 18, 19 is horizontally protruded into the grain culm conveyance path across the upper and lower middle stages from a support shaft 21 installed upright in the casing 20 of the culm height detection device 16. The sensor 17 is located at the maximum culm length position of the grain culm transported in the form of an upright panicle, the intermediate sensor 19 is located at the shortest culm length position of the grain culm transported upright, and the maximum position of the grain culm transported in the form of a lodging.
8 are respectively provided at the shortest culm length positions of the lodging conveyed grain culms.

The upper sensor 17, the lower sensor 18, and the intermediate sensor 19 are each equipped with detection switches 22, 23, and 24 having a normally closed contact and a switching contact. A medium sensor 1 constitutes an upright rice detector that detects the culm height of an upright rice grain culm.
9 and the lower sensor 18 constitute a lodging detector that detects the culm height of the lodging grain culm.

Reference numeral 25 denotes an activation switch for detecting the presence or absence of a grain culm to be transported, and the activation switch 25 is disposed on the upper side of the transport and at a position where the stalk of the grain culm passes.

Reference numeral 26 denotes an operation control device for the drive motor 14, and the operation control device 26 automatically enters the operation mode by closing the start switch 25, and activates the upper sensor 1T and the intermediate sensor 19 or the intermediate sensor 19 and the intermediate sensor 19. Lower sensor 1
8, the drive motor 14 of the handling depth adjustment drive mechanism 11 is controlled in forward and reverse directions, and the grain culm clamping position from the grain culm clamping stock source conveying body 6 to the grain culm supply transfer body 10 is moved in the direction of the grain culm. It operates in such a way that the length of the culm on the tip side inserted into the handling chamber is maintained constant.

21 is an upper limit stopper attached to the reciprocating screw rod 12;
8 is a lower limit stopper, and an upper limit switch 29 and a lower limit switch 30 are provided on the upper and lower surfaces of the movable body 13, respectively, in contrast to the upper and lower limit stoppers 27 and 28.

Reference numeral 31 denotes an operation panel, and the operation panel 31 includes an upper sensor 17 and an intermediate sensor 19, and an intermediate sensor 19 and a lower sensor 18, which constitute the upright rice detector and the lodging detector.
A sensor change-over switch 32 is provided as a change-over device for selecting and changing the combination.

As shown in FIG. 4, the operation control device 26 includes a sensor switching relay X1 that switches detection switches 22, 23, and 24 respectively linked to an upper sensor 17, a lower sensor 18, and an intermediate sensor 19, and a sensor switching relay X1 that switches between forward and reverse drive motors 14. Reverse control relays X2 and X3 and a delay relay X that interlocks the sensor switching relay X1 and forward and reverse control relays X2 and X3.
The sensor changeover switch 32 of the switching device is connected to the excitation circuit of the sensor changeover relay X1, and the start switch 25 is connected to each detection switch 22, 23.2.
4 circuits in series.

Further, the upper limit switch 29 is interposed in series with the excitation circuit of the forward/reverse control relay X2, and the lower limit switch 30 is interposed in series with the excitation circuit of the delay relay X5.

In addition, B is a power battery, and SW is a manual start switch.

Next, the operation of the present invention constructed as described above will be explained.

As the machine moves forward, the grain stalks cut by the cutting blades 4 of the reaping section 2 are transported to one side of the machine by the cutting culm lateral conveyor 5, and then transferred to the grain culm holding stock source conveyor 6 at the grain stem. is held, and the stalk is loosely supported by the grain culm stalk conveyor 8 and conveyed rearward while assuming a substantially upright posture.

Then, the stock origin of the transported grain culm is inherited from the grain culm holding stock source conveyor 6 to the grain culm supply transfer body 10, and the stock origin of the grain culm is held between the grain culm supply transfer body 10 and moved forward. At the same time, the grain culm stalk is conveyed further rearward, changing its posture to a substantially horizontal position, and the ears are threshed. Along the grain supply opening of the section 3, threshing is performed sequentially as the automatic grain supply device 9 transports the grain to the stock.

On the other hand, if there is a grain culm being transported by the grain culm holding stock source transporter 6 and the grain culm stalk part transporter 8, this grain culm is detected by the starting switch 25, so the operation control device 26 of the drive motor 14 is activated. It is ready for action.

Then, the grain culm holding stock source conveyor 6 and the grain culm stem portion conveyor 8
When the grain culm to be conveyed is a harvested grain culm in an erect rice posture (upright shape), the changeover switch 32 of the switching device is operated to switch the erect rice detector of the culm height detection device 16. By activating the upper sensor 17 and the intermediate sensor 19, if the tip of the transported grain culm does not reach the intermediate sensor 19,
Or if the upper sensor 17 is exceeded, the intermediate sensor 1
9 or the upper sensor 17 detects this, and the operation control device 26 controls the drive motor 14 to rotate in the forward or reverse direction, and the tip of the transported grain culm moves toward the culm, and the upper sensor 17 and the intermediate sensor The grain culm holding stock origin conveying body 6 which pinches the grain culm stock origin is tilted up and down in a state located between 19 and 19.

Therefore, regardless of the length of the grain culm that is inherited from the grain culm holding stock source conveyor 6 to the grain culm supply conveyor 10, the culm height from the supporting point to the ear tip is maintained within a certain range, and the grain culm is kept within a certain range. The handling depth of the part 3 inserted into the handling chamber is adjusted within a certain range.

In addition, the grain culms transported by the grain culm holding stock source transporter 6 and the grain culm stem transporter 8 are not harvested grain culms in an upright rice posture (upright shape), but are harvested grain culms in a lodging posture. If the grain culm is harvested, the length between the grain support point and the topmost part of the ear by the grain culm clamping stock former conveyor 6, that is, the apparent length, is Since the upper culm height appears to be lower than the actual culm height, in this case, simply switch the changeover switch 32 of the changeover device and set the sensors 1γ, 18.1 separately.
Since the standing rice detector consisting of the upper sensor 17 and the intermediate sensor 19 can be immediately switched to the lodging detector consisting of the intermediate sensor 19 and the lower sensor 18 without the operator having to adjust the position of The culm height of the culm can be accurately detected without causing errors due to individual differences.

Note that in this embodiment, the upper sensor 17 and the intermediate sensor 19
is used as the first detection part, and is used as a detector for the culm height in the standing rice state, and the intermediate sensor 19 and the lower sensor 18
is used as the second detection part, and this is used as a detector for the culm height in the lodging state. It goes without saying that a detector may be used as the detection unit.

Furthermore, in the embodiment described above, the operator manually switches each detector using the sensor changeover switch 32 provided on the operation panel 31.
By providing the sensor at a position where the erect grain culm acts, such as in the tiller, it is possible to automatically detect whether the erect grain culm before harvesting is in an erect state or a lodging state, and to automate the sensor switching operation.

In summary, the present invention includes a vertical rice grain detector that detects the culm height of the vertical rice grain culm on the grain culm transport path from the reaping section to the threshing section;
A fixed-position detection device consisting of a lodging detector for detecting the culm height of the lodging grain culm is provided, and a standing rice grain culm detection state in which the upright rice detector operates and a lodging grain culm detection state in which the lodging detector operates. Since a switching device that can be selectively switched is installed in the culm, the detector that detects the culm height of the transported grain culm installed on the grain culm transport path from the reaping section to the threshing section can be moved to any position in the culm direction of the grain culm. By making it possible to select and switch between the upright rice detector and the lodging detector installed in a fixed position through a switching device without making any adjustments,
The detection device can be instantly switched to either the standing rice grain culm detection state or the lodging grain culm detection state, and at the same time, once switched, the detection device remains in the fixed position and does not need to be adjusted. Adjustment errors due to individual differences between drivers can also be prevented, and the detection device can quickly and accurately detect the culm height.

[Brief explanation of drawings]

The drawings show an embodiment of the grain culm height detection device for a combine harvester according to the present invention, in which FIG. 1 is a side view of the entire combine, FIG. 2 is a perspective view of a part thereof, and FIG. FIG. 4 is a perspective view of the circuit of the operation control device. In the figure, 2 is a reaping section, 3 is a threshing section, 4 is a cutting blade, 5 is a cutting culm horizontal conveyor, 6 is a grain culm clamping stock source conveyor, 8 is a grain culm stem conveyor, and 9 is a grain culm automatic conveyor. A feeding device, 10 is a grain culm feeding conveyor, 11
14 is a forward/reverse drive motor; 16 is a handling depth adjustment drive mechanism;
17 is a culm height detection device, 17 is an upper sensor, 18 is a lower sensor, 19 is an intermediate sensor, 22, 23, 24 is a detection switch thereof, 25 is a starting switch, 26 is an operation control device, 32
is the sensor changeover switch, X1 is the sensor changeover relay, X2
, X3 is a forward/reverse control relay, X4 and X5 are delay relays B
The power switch IJ-SW is a manual start switch.

Claims (1)

[Claims] 1. A fixed-position detection device is provided on the grain transport path from the reaping section to the threshing section, consisting of an upright rice detector that detects the culm height of the upright rice grain culm and a lodging detector that detects the culm height of the lodging grain culm. A grain culm in a combine harvester, characterized in that a switching device is provided for selectively switching between an upright grain culm detection state in which the upright rice detector operates and a lodging grain culm detection state in which the lodging detector operates. Length detection device.