JPH0595249U - Combine handling depth control device - Google Patents

Abstract

(57) [Abstract] [Purpose] To reliably prevent abnormal operation of the grain culm conveying device (handling depth adjuster) at the beginning of mowing and improve the processing precision of the threshing process and the culm removal process. [Structure] At the beginning of cutting, considering the detection time difference T2 between the grain culm detection sensor 14 and the tip detection sensor 15 and the merging time difference T1 of each row, until the delay timer time T obtained by adding both time differences elapses. The operation of the culm carrier 9 toward the deep side is restricted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a combine depth control device for harvesting and threshing grain culms.

[0002]

[Problems to be Solved by Prior Art and Invention]

 Generally, in this kind of combine, a grain culm transporting device with adjustable handling depth is provided in the grain culm transporting route leading to the threshing section, and the grain culm transporting device detects grain culm by detecting the presence or absence of grain culm. There is a device that is configured to automatically control the handling depth based on the detection of the sensor and the tip detection sensor that detects the tip position of the grain culm on the transport lower side than the grain culm detection sensor. However, in a multi-row cutting combine equipped with multiple scraping paths arranged in the left-right direction, the cut grain culms scraped from each scraping path are merged via the horizontal transport path and then fed to the threshing section. Since it is configured to be transported, from the beginning of the cutting of grain culms to the time when all the grain culms of each row merge, the stacking of grain culms is inevitably thin and the detection of the tip detection sensor becomes unstable. At the beginning of mowing, the problem was that the grain culm transporting device abnormally operated toward the deep side and disturbed the grain culm transporting posture, resulting in a decrease in the accuracy of threshing and culm treatment.

[0003]

[Means for Solving the Problems]

 The present invention was devised with the aim of providing a combine handling depth control device capable of eliminating these drawbacks in view of the above-mentioned circumstances. The cutting grain culm is scratched from the jamming path, the scraped grain culms are merged, and then the grain culm is conveyed to the threshing section via the grain culm conveying device with adjustable handling depth. , A grain culm detection sensor that detects the presence or absence of grain culm in the transport path from the confluence position to the threshing unit, and a tip detection sensor that detects the tip position of the grain culm on the transport lower side than the grain culm detection sensor. In the combine in which the handling depth is automatically controlled based on the above, the handling depth control unit that performs the handling depth automatic control detects the difference between the detection times of the both detection sensors and the plurality of sweeping paths. The delay based on the sum of the difference in the confluence time of In addition to setting the timer time, an operation regulating means is provided to regulate at least the operation of the grain culm conveying device to the deep handling side from the time when the grain culm detection sensor detects grain culm until the delay timer time elapses. It is characterized by that. With this configuration, the present invention is capable of reliably preventing abnormal operation of the grain culm transporting device at the beginning of mowing and significantly improving the processing precision in the threshing process and the culm removal process. is there.

[0004]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a combine traveling machine, and the traveling machine 1 includes a pretreatment unit 2 for cutting grain culms, a threshing unit 3 for threshing the harvested grain culms, and a discharged threshing culm. The pre-processing unit 2 is composed of a post-processing unit (not shown) for processing, and the pre-processing unit 2 divides grain culms into a number of cutting lines, a raising unit 5 for raising grain culms, and a raising unit. On the left end side of the pretreatment unit 2, a cutting blade 6 for cutting the root of the scraped rice culm, a scraping device 7 located above the cutting blade 6 for scraping the rice stalk, and the scraped rice stalk A horizontal transport device 8 for merging and a grain culm transport device 9 for transporting the merged grain culms to the threshing unit 3 while changing the vertical posture from a horizontal posture are provided, but these basic configurations are the same as conventional ones. .

The grain culm transporting device 9 is configured in a unit by juxtaposing a stock yuan chain 10 for sandwiching and transporting the grain cultivar side of the grain culm and a tip carrier 11 for feeding and transporting the culm side of the grain culm. However, this is configured to swing up and down based on the drive of the electric motor 12 with the end of the conveyance as a fulcrum. That is, the handling depth in the threshing section 3 can be adjusted by changing the sandwiching position of the grain culm based on the vertical swing of the grain culm transporting device 9.

Further, 13 is a bracket provided in the grain culm transporting device 9, and a stock holding frame 13 a facing the stock chain 10 is integrally fixed to the tip of the bracket 13. However, while the stock holding frame 13a is provided with a grain culm detection sensor 14 for detecting the presence or absence of grain culm in the grain culm transporting device 9, at a position lower than the grain culm detection sensor 14 in the conveyance lower position. At the base end of a certain bracket 13, there is provided a tip detection sensor 15 for detecting the tip position of the grain culm by a pair of contact sensors 15a.

On the other hand, 16 is a control device arranged near the driver's seat, and the control device 16 is constituted by using a so-called micro computer (including MPU, ROM, etc.). While the signals are input from the grain culm detection sensor 14, the tip detection sensor 15, the automatic handling depth switch 17, the vehicle speed detection sensor 18, etc., the operation signal is sent to the electric motor 12 etc. by the judgment based on these input signals. It is supposed to output. That is, in the control device 16, a control procedure of so-called automatic handling depth control for automatically controlling the vertical position of the grain culm transporting device 9 based on the detection by the tip detection sensor 15 is stored in advance.

In the automatic handling depth control, first, the operating state of the handling depth automatic switch 17 is determined, and if it is OFF, the signal output to the electric motor 12 is stopped while it is turned ON. In some cases, the detection state of the grain culm detection sensor 14 is subsequently determined. Here, when it is determined that the grain culm detection sensor 14 is OFF, the signal output to the electric motor 12 is stopped, and when it is determined that it is ON, the tip detection sensor 15 is configured. In order to position the tip between the pair of contact sensors 15a, 15a, the grain culm conveying device 9 is inching actuated on the deep handling side and the shallow handling side based on the detection of the both contact sensors 15a, 15a (actuation by an intermittent signal). However, the operation toward the deep side is restricted until the predetermined delay timer time T elapses after the grain culm detection sensor 14 is turned on. That is, immediately after the grain culm detection sensor 14 is turned on, since the grain culm has not reached the tip detection sensor 15 position, the tip detection sensor 15 cannot detect the tip position, and the grain culm conveying device 9 has an abnormality on the deep side. There is a possibility that it will be activated. Therefore, based on the detection value of the vehicle speed detection sensor 18 (proportional to the pre-processing speed), the conveyance distance B from the grain culm detection sensor 14 to the tip detection sensor 15 is detected by both detection sensors 14 , 15 to delay the deep cultivating operation of the grain culm transporting device 9 by converting it to the detection time difference T2, but in the present invention, the grain culm passing through the lateral transporting device 8 merges with other grain culms to detect the tip of the grain. Until the position of the sensor 15 is reached, the deepening operation of the grain culm transporting device 9 is delayed. That is, the transport distance A of the lateral transport device 8 is converted into the merging time difference T1 of each line based on the detection value of the vehicle speed detection sensor 18, and the merging time difference T1 and the detection time difference T2 are added to add a delay timer. It is configured to set at the time T. Therefore, during the beginning of cutting, while the stack of grain culms is thin, the deep handling operation of the grain culm transporting device 9 is restricted to cause abnormal operation based on unstable detection of the tip detection sensor 15. Is surely prevented.

In the embodiment of the present invention configured as described above, the grain culm transporting device 9 having an adjustable handling depth is provided with a double contact so that the tip of the grain culm can be located between the contact sensors 15a, 15a. Based on the detection of the sensors 15a, 15a, it will be automatically operated on the deep side and the shallow side, but at the beginning of cutting, the detection time difference T2 between the grain culm detection sensor 14 and the tip detection sensor 15, Considering the merge time difference T1 of each row, the operation of the grain culm carrier device 9 to the deep handling side is restricted until the delay timer time T, which is obtained by adding both time differences, elapses. That is, until the grain culm that has passed through the lateral conveying device 8 merges with other grain culms and reaches the position of the tip detection sensor 15, that is, the state in which the grain culm does not reach the position of the tip detection sensor 15, and further the position of the tip detection sensor 15 While the stacking of the grain culm in (1) is thin, the deep handling operation of the grain culm transporting device 9 is regulated to surely prevent the abnormal operation based on the unstable detection of the tip detection sensor 15. Therefore, although the grain culms of each row are joined via the lateral transport device 8, abnormal operation of the grain culm transport device 9 at the beginning of cutting can be reliably prevented, and as a result, threshing treatment and culm removal treatment are performed. It is possible to significantly improve the processing accuracy in the process.

In addition, in the embodiment, since the delay timer time is not fixed and the calculation is performed based on the vehicle speed detection value that is proportional to the processing speed of the preprocessing unit, highly accurate delay setting can be performed. Therefore, it is possible to eliminate the disadvantage that the delay time is unnecessarily lengthened and the precision of the depth control is reduced, and that the delay time is shortened and the abnormal operation of the grain culm carrier 9 cannot be prevented. it can.

[0011]

[Operation effect]

 In short, since the present invention is configured as described above, it automatically controls a grain culm transporting device that is capable of adjusting the handling depth based on the detections of the grain culm detection sensor and the tip detection sensor. However, at the beginning of mowing, the delay timer time is set by considering the detection time difference between the both detection sensors and the confluence time difference of the grain stems scraped from the plurality of scraping routes. Until the time elapses, at least the operation of the grain culm transporting device to the deep side is restricted. That is, until the grain stalks scraped from each scraping path merge and reach the tip detection sensor position, that is, the state where the grain culms do not reach the tip detection sensor position, and the stacking of grain culms at the tip detection sensor position. When the grain is thin, the deep operation of the grain culm transporting device is restricted, so it is possible to reliably prevent abnormal operation of the grain culm transporting device based on unstable detection by the tip detection sensor. Become. Therefore, even if it has a plurality of scraping paths arranged in the left-right direction, it is possible to regulate abnormal operation of the grain culm transporting device at the beginning of mowing and perform highly accurate depth control. It is possible to significantly improve the processing accuracy of threshing processing and culm processing.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a combine.

FIG. 2 is a side view of a main part of a pretreatment unit.

FIG. 3 is a plan view showing a mounting state of a sensor.

FIG. 4 is a block diagram showing a schematic configuration of an automatic handling depth control mechanism.

FIG. 5 is a flow chart of automatic handling depth control.

FIG. 6 is a timing chart showing the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Pre-processing part 3 Threshing part 9 Grain culm conveying device 14 Grain culm detection sensor 15 Ear tip detection sensor 16 Control device

Claims (1)

[Scope of utility model registration request] 1. The threshing culms are scraped from a plurality of scraping paths lined up in the left-right direction, the scraped culms are merged, and then the threshing section is transferred to a threshing section via a grain culm conveying device with adjustable handling depth. In addition to being configured to convey, the grain culm conveying device, a grain culm detection sensor for detecting the presence or absence of grain culm in the conveying path from the confluence position to the threshing section, and the grain culm on the conveying lower side than the grain culm detection sensor. In a combine that automatically controls the handling depth based on the detection with the tip detection sensor that detects the tip position of the, the handling depth control unit that performs the handling depth automatic control includes the detection time difference between the both detection sensors. , While setting the delay timer time based on the sum of the confluence time difference of the grain stalks scraped from the plurality of sweeping paths, until the delay timer time elapses after the grain culm detection sensor detects the grain culm At least during the deep handling of the grain culm carrier A combine handling depth control device, characterized in that an operation restricting means for restricting operation toward the side is provided.