JPH0718263Y2 - Combine depth control device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a threshing device and a threshing device, which can change the insertion amount (treating depth) of the tips of grain culms to be inserted into the threshing device. A sensor that detects the position of the tip of the grain culm inserted into the inside, and based on the detection of the sensor, the amount of the tip of the grain culm inserted into the threshing device (handle depth) is maintained at the set value. The present invention relates to a combine handling depth adjusting device including a drive unit that drives a height changing unit.

[Conventional technology]

An example of the combine depth adjusting device described above is disclosed in Japanese Utility Model Laid-Open No. 57-65040.

With this structure, the tip position of the grain culm can be set by contacting the grain tip of the grain culvert and outputting an ON / OFF signal to a conveyor device (corresponding to the handling depth changing unit) that conveys the cut grain culm to the threshing device. It is equipped with a sensor to detect, and by changing the attitude of the conveyor with a hydraulic cylinder (corresponding to the driving means) based on the detection of this sensor, the amount of insertion of the tips of the culms into the threshing device (the amount of handling depth). ) Is maintained at the set value.

Since the length of the culm to be cut is relatively variable,
If the transport device is configured to follow the ON / OFF signal from the sensor as it is, the posture changing operation of the transport device is frequently performed, which may cause a hunting phenomenon.

Therefore, it has been proposed that after a set time has elapsed from the detection by the sensor, the posture changing operation of the conveyance device is performed based on the detection to suppress the hunting phenomenon and the overshoot phenomenon.

[Problems to be solved by the device]

In the above-mentioned configuration, the posture change operation of the transfer device by the hydraulic cylinder is always performed at a constant speed, and the posture change operation of the transfer device is performed only after the set time has elapsed from the detection by the sensor. The following situations may occur.

In other words, the posture of the carrier is undefined at the start of cutting, so for example, when the carrier is located on the shallow handling side corresponding to a long culm, a short culm is suddenly sent with the start of mowing. In this case, it takes a time to move the posture of the transport device to the deep treatment side corresponding to the short grain culm based on the detection of the sensor.

As a result, a state in which the tip of the culm is not properly inserted into the threshing device (amount of handling depth) occurs at the start of cutting, and during this time, sufficient threshing of the culm cannot be performed, resulting in defective threshing. It will be.

The present invention is capable of suppressing threshing defects particularly at the start of cutting while leaving the advantage that the hunting phenomenon and the overshoot phenomenon are suppressed by performing the posture changing operation of the conveying device after the lapse of a set time from the detection by the sensor. Has an aim.

[Means for Solving the Problems] The feature of the present invention resides in that the combine handling depth adjusting device as described above is configured as follows.

Based on the detection of the handling depth changing unit that can change the insertion amount of the tip of the grain culm inserted into the threshing device, the sensor that detects the tip position of the grain culm inserted into the threshing device, and the detection of the sensor, The threshing device is equipped with drive means for driving the handling depth changing part so that the insertion amount of the tip of the culm is maintained at the set value.After the set time elapses from the detection by the sensor, the drive is performed based on this detection. Means to drive the handling depth changer by the driving means, and after the sensor has detected a set time shorter than the setting time in the low speed mode, the driving means will drive the handling depth changer based on the sensor detection. And set the high speed mode in which the driving means drives the handling depth changing unit at a higher operating speed than the operating speed of the driving means in the low speed mode. Equipped with a discriminating means to discriminate When the sensor detects that the insertion amount of the tip of the culm to the threshing device is out of the set value at the beginning, the high-speed mode is set, and the insertion amount of the tip of the culm to the threshing device becomes the set value. A control means is provided for setting the low speed mode when returning to the coincident state.

[Action]

(I) When configured as in the present invention, for example, as shown in FIG.
At the start of mowing, the high speed mode is set based on the judgment of the judgment means (corresponding to the start switch), and the driving means for the handling depth changing section operates at a higher speed than the low speed mode described later (# 10, # 29). Step), and a set time (K ₁ ), which is shorter than the set time (K ₂ ) and (K ₄ ) of the low-speed mode described later,
(K ₃ ) is set (# 9, # 28 steps). As a result, after a short set time (K ₁ ) or (K ₃ ) has passed since the detection by the sensor, the driving means for the handling depth changing portion is brought into a state of operating at high speed (# 10, # 29 steps).

As described above, because of the short interval from the detection of the sensor to the start of the operation of the handling depth changing unit, no matter what kind of long or short grain culm is supplied at the start of mowing, the tip position of the first grain culm is supplied. And, the change in the tip position after that can be detected quickly.

And since the operation speed of the handling depth changing unit once is fast, the handling depth changing unit is quickly activated based on the detection of the tip position of the grain culm. Even if a culm is sent, the handling depth changing unit is changed to an appropriate posture without delay.

(Ii) On the contrary, in a normal mowing state other than the start of mowing, the low speed mode is set based on the judgment of the judging means (corresponding to the start switch), and the driving means for the handling depth changing section is set to be higher than the high speed mode described above. Also operates at low speed (# 20, # 39 steps),
Also, set times (K ₂ ) and (K ₄ ) longer than the set times (K ₁ ) and (K ₃ ) in the high speed mode described above are set (steps # 9 and # 28). As a result, after a long set time (K ₂ ) or (K ₄ ) has elapsed since the detection by the sensor, the drive means for the handling depth changing section is in a state of operating at a low speed (# 20, # 39 steps).

Therefore, the handling depth changing unit is compared by two points, that is, the interval from the detection of the sensor to the starting of the handling depth changing unit is long and the operation speed of one handling depth changing unit is slow. As a result, the hunting phenomenon and the overshoot phenomenon, in which the handling depth changing portion is not stabilized in an appropriate posture, are prevented.

[Effect of device]

As described above, when the cutting operation is started, the operating speed of the handling depth changing unit is increased once, and the interval from the detection of the sensor to the start of the operation of the handling depth changing unit is shortened, so that the threshing device can be operated. It was possible to quickly and properly adjust the amount of insert (the amount of handling depth) of the tips of the grain culm, and it was possible to prevent defective threshing at the start of cutting and improve the threshing performance of the combine.

Then, during normal mowing work, the operating speed of the handling depth changing unit once becomes slow, and the interval from the detection of the sensor to the start of operation of the handling depth changing unit becomes long, so that the hunting phenomenon and the overshoot phenomenon occur. It is provided as it is without impairing the advantage of the conventional configuration of suppressing.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 5, a mowing pretreatment unit (3) is connected to the front part of the traveling vehicle body (2) equipped with the threshing device (1) so that it can be swung up and down around the lateral axis (P). It constitutes a combine. As shown in FIG. 5 and FIG. 2, the pre-mowing processing unit (3) is a raising device (4) that causes a grain rod to be planted in a field, and a clipper-type cutting device that cuts the root of the grain rod. (5) The transport device (C) (corresponding to the handling depth changing unit) that feeds the cut grain rod to the feed chain (6) of the threshing device (1).

The transfer device (C) is composed of a holding transfer mechanism (7) on the root side and a locking transfer mechanism (8) on the tip side, and is configured to be capable of swinging up and down independently around a lateral axis (P). Has been done. The locking transfer mechanism (8) is composed of a large number of locking claws (8a), and the clamping transfer mechanism (7) is composed of an endless chain (7a) and a clamping rail (7b), and a clamping rail (7b). Is connected to a frame (not shown) of the carrier device (C) via an inverted U-shaped frame (9).

This combine is equipped with a handling depth adjusting device for maintaining the insertion amount of the tips of the grain rods inserted into the threshing device (1), that is, the handling depth amount at a set value. The adjusting device will be described.

As shown in FIG. 2, a stock origin switch (10) for detecting the presence or absence of a cut grain rod, a long culm sensor (11) for detecting the tip position of the grain rod sent by a carrier device (C) (to a sensor). (Corresponding), short culm sensor (12) (corresponding to sensor), starting switch (13) (corresponding to discrimination means) for activating the handling depth adjusting device, and threshing switch (14) for detecting the operating state of the threshing device (1). ), The control device (1
5) (corresponding to control means), drive circuit (16) to which a signal from the control device (15) is input (corresponding to drive means), driven by power from the drive circuit (16) to convey device (C) An electric motor (17) (corresponding to a driving means) for swinging around the horizontal axis (P) is provided.

As shown in Figs. 2, 3 and 4, long culm and short culm sensors (11), (1
2) is ON / OFF with contact type rods (11a), (12a)
Type switch (11b), (12b), which is fixed to the frame (9) with a gap in the direction of the rod of the grain rod, and is set to turn on when the rod is detected. There is. Then, the conveying device (C) is controlled by feedback so that the threshing process is performed in an appropriate handling depth state in which the tip of the tip of the grain culm is located between the long culm and short culm sensors (11) and (12). A control device (15) is configured so as to swing.

As shown in FIG. 2, a rack gear (19) that meshes with a pinion gear (18) attached to the output shaft of the electric motor (17).
Are connected to a frame (20) connected to the transfer device (C). As a result, the electric motor (17) is actuated in both the forward and reverse directions, whereby the transport device (C) is oscillated to change the gripping position of the grain rod from the reaping device (5) to adjust the handling depth. Done.

A microprocessor (not shown) is incorporated in the control device (15), and the handling depth is adjusted according to the flowchart shown in FIG.

When the microprocessor starts operating, the control device (15) is set to the inactive state until the reference time elapses (# 1
If the start switch (13) is turned off, the initial setting is performed (# 2, # 3 steps). In this initial setting, the high speed mode is set, and the operating speed of the electric motor (17) for the transport device (C) is set to high speed.
OFF counter (S ₀ CNT), short culm sensor ON counter (S ₁ CN
T), long culm sensor OFF counter (L ₀ CNT) and long culm sensor O
The N counter (L ₁ CNT) is set to zero.

Next, the start switch (13) is turned on, the stock source switch (10) is turned on with the start of mowing, and the threshing switch (14) is turned on, and then the short culm sensor (12) is turned on. The state is determined (# 2, # 4, # 5, # 6 steps). In this case, if the short culm sensor (12) is in the OFF state, first the short culm sensor OFF counter (S ₀ CNT) is incremented by 1 count (# 7 step), and the short culm sensor is turned OFF through the # 8 step. The value of the counter (S ₀ CNT) is compared with a predetermined value (K ₃ ) (corresponding to the set time) (# 9 step).

By counting up, the short culm sensor OFF counter (S ₀ CN
When T) has reached the predetermined value (K ₃ ), the electric motor (17) is operated to the deep side by the intermittent signal (# 10, # 11 steps). On the contrary, if the specified value (K ₃ ) is not reached,
The short culm sensor (12) turns on at step # 6 in the previous process.
Although it was in the state, it is determined whether it is (# 12 step) and ON
If there is a short culm sensor ON counter (S ₁ CNT)
Is incremented by 1 counter (# 13 step),
If it is OFF, the branched flow is merged with the flow from step # 13.

Next, if the processing is repeated and the time of 2 seconds elapses (# 14
Step), the value of the short culm sensor ON counter (S ₁ CNT) is compared with the predetermined value (A), and if the predetermined value (A) is reached, the electric motor (17) is operated to the deep side for a certain period of time. (# 15,16
Step), the short culm sensor ON counter (S ₁ CNT) is set to zero (# 17 step). Conversely, in step # 15, the value of the short culm sensor ON counter (S ₁ CNT) reaches the predetermined value (A). If not, join the flow from step # 16 and set the short culm sensor ON counter (S ₁ CNT) to zero. #14
If 2 seconds have not elapsed in step, merge with the flow from step # 17 and turn off the long culvert sensor OFF counter (L ₀ CN
T) and the long culm sensor ON counter (L ₁ CNT) are set to zero (# 18 step).

When the low speed mode is set by the processing described later, the process branches to step # 8 and the value of the short culm sensor OFF counter (S ₀ CNT) and the predetermined value (K ₄ ) (corresponding to the set time) are set. Are compared (# 19 step). In this case, if the value of the short culm sensor OFF counter (S ₀ CNT) has reached the predetermined value (K ₄ ) due to the count-up, the motor will be driven by the intermittent signal with the ON time set to be shorter than the intermittent signal of the # 10 step. Motors (17)
To the deep side (# 20, # 11 steps). On the contrary, when the value of the short culm sensor OFF counter (S ₀ CNT) has not reached the predetermined value (K ₄ ), the flow merges from step # 9 to step # 12.

In step # 6, if the short culm sensor (12) is in the ON state, the state of the long culm sensor (11) is determined (# 21 step). If the long culm sensor (11) is in the OFF state, it is turned off for 0.5 seconds from the branch. After determining that the state is maintained, the low speed mode is set, and the moving speed of the transfer device (C) is set to the low speed (# 22, # 23 steps). Then, the operation of the electric motor (17) is stopped, and the short culm sensor OFF counter (S ₀ CNT) and the long culm sensor ON counter (L ₁ CNT) are set to zero (# 24,
# 25 step). That is, the fact that the processing state is set in the flow of # 22 step means that the tip of the tip of the grain rod is located between the long culm sensor (11) and the short culm sensor (12). And after this treatment, the transport device (C)
Moves slowly.

Next, if the long culm sensor (11) is in the ON state in step # 21, the long culm sensor ON counter (L ₁ CNT) is incremented by one (# 26 step), and in the high speed mode, The value of the long culm sensor ON counter (L ₁ CNT) is compared with the predetermined value (K ₁ ) (corresponding to the set time) (# 27, # 28 steps).

The long culm sensor ON counter (L ₁ CN
If the value of (T) has reached the predetermined value (K ₁ ), the electric motor (17) is operated to the shallow handling side by the intermittent signal (# 29, # 3
0 steps). On the contrary, if the predetermined value (K ₁ ) has not been reached, the long culm sensor (11) is selected at step # 21 in the previous processing.
Is determined to be OFF (# 31 step), O
If it is FF, the long culm sensor OFF counter (L ₀ CNT) is incremented by 1 (# 32 step) and turned ON.
If it is, the branched flow is merged with the flow from the # 32 step.

Next, if the processing is repeated and the time of 2 seconds has elapsed (# 33
Step), the value of the long culm sensor OFF counter (L ₀ CNT) is compared with the predetermined value (A), and if the value reaches the predetermined value (A), the electric motor (17) is operated to the shallow handling side for a certain period of time. (# 34, # 3
5 steps), long culm sensor OFF counter (L ₀ CNT)
Is set to zero (# 36 step). If the value of the long culm sensor OFF counter (L ₀ CNT) has not reached the predetermined value (A) in step # 34, join the flow from step # 25,
Set the long culm sensor OFF counter (L ₀ CNT) to zero. # 33
If 2 seconds have not passed in step, merge with the flow from # 36 step and turn off the short culm sensor (S ₀ CNT)
Also, the short culm sensor ON counter (S ₁ CNT) is set to zero (# 37 step).

In the low speed mode, the process branches at step # 27 and compares the value of the long culm sensor ON counter (L ₁ CNT) with a predetermined value (K ₂ ) (corresponding to the set time) (step # 38). In this case, the long culm sensor ON counter (L ₁
If the value of (CNT) has reached the specified value (K ₂ ), # 2
The ON signal is set to be shorter than the intermittent signal for 9 steps and the electric motor (17) is operated to the deep side by the intermittent signal (# 39,
(# 30 step), if not reversed, join the flow from step # 28 to step # 31.

As described above, in step # 15, if the short culm sensor (12) is repeatedly turned on and off for 2 seconds before the electric motor (17) is intermittently operated to the deep side, this state will be shortened. This is a process for determining that the tip of the tip of the grain rod substantially coincides with the position of the sensor (12), and if such a determination is made, the size of the predetermined value (A) is set so that the grain rod is set in a deeply handled state. Is set. At the same time, in step # 34, it is determined that the tip of the tip of the grain rod is substantially aligned with the position of the long culm sensor (11), and the predetermined value (A) is set so that the grain rod is set to the shallow handling state. The size is set.

If the short culm sensor (12) is in the OFF state in step # 6, the result of counting up in step # 7 is # 19.
Predetermined value of step (K ₄₎ Tan稈sensor OFF counter (S ₀ C
The value of the predetermined value (K ₄ ) is set so that the value of (NT) reaches 1 second, and the short culm sensor OFF counter (S ₀ CNT) is set to the predetermined value (K ₃ ) of # 9 step. The value of the predetermined value (K ₃ ) is set so that the time when the value of 1 reaches is 1 second or less.

Similarly, as a result of being counted up in step # 26, # 38
Predetermined value of step (K ₂₎ to Naga稈sensor ON counter (L ₁ CN
The value of the predetermined value (K ₂ ) is set so that the value of (T) reaches 0.3 seconds, and the long culm sensor ON counter (L ₁ CNT) is set to the predetermined value (K ₁ ) of # 28 step. The value of the predetermined value (K ₁ ) is set so that the time that the value of reaches will be 0.3 seconds or less.

After the combine reaches the headland and the stock switch (10) remains off for more than 1 second, the high speed mode is set and the short culm sensor is turned off when the work is started again. Counter (S ₀ CNT), short culm sensor ON counter (S ₁ CNT), long culm sensor OFF counter (L ₀ CNT) and long culm sensor ON counter (L ₁ CNT) are set to zero (# 40 , # 3 step).

[Another embodiment]

In addition to the above embodiments, the present invention is configured such that the transfer device (C) is moved by a hydraulic actuator, and the moving speed of the transfer device (C) is adjusted by adjusting the ON time of a signal for intermittently operating the hydraulic actuator. May be switched.

[Brief description of drawings]

1 is a flow chart showing the operation of a control device, and FIG. 2 is a block diagram showing the configuration of a combine handling depth adjusting device according to the present invention. 3 is a front view showing the mounting positions of the long culm and short culm sensors, FIG. 4 is a plan view showing the mounting positions of the long culm and short culm sensors, and FIG. 5 is a side view of the front part of the combine. (1) ... threshing device, (11), (12) ... sensor, (1
3) …… discrimination means, (15) …… control means, (16), (1
7) …… Driving means, (C) …… Handling depth changing part, (K ₁ ),
(K ₂ ), (K ₃ ), (K ₄ ) ... Setting time.

Claims (1)

[Scope of utility model registration request] 1. A handling depth changing unit (C) capable of changing the insertion amount of the tips of grain culms inserted into the threshing device (1), and a grain culm inserted into the threshing device (1). Based on the sensors (11) and (12) that detect the tip position, and the detection of the sensors (11) and (12), the insertion amount of the tips of the grain culms into the threshing device (1) is maintained at a set value. As described above, the driving means (16) and (17) for driving the handling depth changing unit (C) are provided, and the set time (K ₂ ) from the detection of the sensors (11) and (12),
After the elapse of (K ₄ ), the drive means (1
6) and (17), the low speed mode in which the handling depth changing unit (C) is driven, and the set time (K ₂ ) and (K) in the low speed mode from the detection of the sensors (11) and (12). Setting time (K ₁ ) shorter than ₄ ),
After the lapse of (K ₃ ), the driving depth changing section (C) is driven by the driving means (16) and (17) based on the detection of the sensors (11) and (12), and the low speed And a high speed mode in which the handling depth changing unit (C) is driven by the driving means (16) and (17) at an operating speed higher than the operating speed of the driving means (16) and (17) in the mode. Is provided with a discrimination means (13) for discriminating whether or not it is time to start mowing, and the sensors (11) and (12) are used at the time of starting mowing to remove the grain culm to the threshing device (1). When it is detected that the insertion amount of the tip is out of the set value, the high-speed mode is set, and when the insertion amount of the tip of the grain culm into the threshing device (1) returns to a state where the set amount matches the set value. A combine handling depth adjusting device comprising a control means (15) for setting the low speed mode.