JPH0514741Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a conveying device configured to be able to change the clamping position of the harvested grain culm by moving operation, and from the conveying device to the threshing feed chain. A pair of sensors for detecting the position of the tip of the grain culm is provided on the grain culm transport route, and the transport device is moved and operated so that only the sensor on the stock side of the pair of sensors detects the grain culm, and the After the sensor on the plant side changes from the sensing state to the non-sensing state, the grain culm is moved to the deep handling side by being in the non-sensing state for a set time, and the handling depth is set with an activation delay time. Relating to an adjustment device.

[Conventional technology]

Conventionally, as mentioned above, a handling depth adjusting device having a structure in which only the sensor on the stock side of a pair of sensors operates in a direction to maintain a state in which it detects the grain culm has been disclosed, for example, in Japanese Unexamined Utility Model Publication No. 57-65040. There are some preparations for the combine as shown in the figure below.

In addition, as mentioned above, if the activation delay time is set, even if the sensor on the plant side suddenly detects weeds contained in the grain culm being sent to the conveyor, the conveyor will not operate. Since the transfer device is not moved, the transfer device can be moved smoothly.

[Problem that the invention attempts to solve]

Also, considering the above-mentioned activation delay time, since the structure moves the conveying device to the deep handling side when the sensor does not detect the grain culm for a set time, for example, the position of the sensor on the stock side and the position of the tip of the grain culm are different. In a state where the two substantially coincide with each other, the sensor repeats a sensing state and a non-sensing state, and in such a case, the movement of the conveying device is not performed.

In other words, the activation delay time is the time for sampling, and the sensing results of the sensor within this time activate the movement of the transport device.
Because it was limited to either stopping the moving operation, even if the position of the sensor on the stock side and the position of the grain tip almost coincided as described above, the grain culm being transported would not be able to move.
That position is maintained.

However, the handling action on grain culms is based on the appropriate handling depth, and while deep handling does not cause many problems, shallow handling tends to result in untreated grains.
As mentioned above, even when the position of the sensor on the stock side and the position of the tip of the grain culm substantially match, it is desirable to move the grain culm to the side for deep handling.

The object of the present invention is to provide a handling depth adjusting device that can be set as close to the proper handling depth as possible even in shallow handling conditions through reasonable modification.

[Means for solving problems]

The feature of the present invention is that in the handling depth adjustment device having the above configuration, the sensor on the stock side switches from a state in which the presence of grain culms is detected to a state in which it does not occur within a predetermined time period that is longer than the set time period. The present invention is further provided with a control means for moving the conveying device by a set amount toward the deep handling side when the number of times the transfer occurs exceeds a set number of times,
Its action and effects are as follows.

[Effect]

That is, as shown in FIG. 5, in step #19, if the sensor 12 on the stock side continuously detects the grain culm, the value of K1 is set so that the duration is ₁ second, Also, in step #9, the value of _K3 is set so that the duration is shorter than 1 second,
If it is determined in each step that there is no sensing, the switching of the sensor 12 on the stock side is counted up in steps #12 and #13, and the value obtained by this count up is If the predetermined value A is reached within 2 seconds, it is determined that the position of the tip of the grain culm to be transported substantially coincides with the position of the sensor 12, and the electric motor 17 is operated for a certain period of time to move the grain culm to be transported. Set it on the deep handling side (#14, #15, #16 steps).

Note that the predetermined value A is not a low value such as 2 or 3, but is determined by taking into consideration the transportation speed of the grain culm and the time required for the rod 12a of the sensor 12 to return.
It is set to an appropriate large value, and the electric motor 1
The operating time 7 is set to the time required to move the tip of the grain culm from the position of the sensor 12 on the plant side to approximately the middle of the two sensors 11 and 12.

[Effect of idea]

Therefore, by counting the switching of the sensor on the stock side,
The position of the tip of the grain culm being transported is determined and controlled based on the value obtained by this count, without the need for modifications such as adding a new sensor. A handling depth adjustment device that can set a handling depth in a relatively appropriate state was obtained.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 4, a reaping pre-processing section 3 is connected to the front part of a traveling vehicle body 2 on which a threshing device 1 is mounted so as to be able to swing up and down about a horizontal axis P to constitute a combine harvester.

As shown in the same figure and FIG.
consists of a device 4 for raising the planted grain culm, a clipper-type reaping device 5 for cutting the stock base of the planted grain culm, and a conveying device C for sending the harvested grain culm to the feed chain 6 of the threshing device 1; The conveyance device C is composed of a clamping conveyance mechanism 7 on the stock side and a locking conveyance mechanism 8 on the ear side, and is configured to be able to swing up and down independently around the axis P.

Further, the locking conveyance mechanism 8 has a large number of locking claws 8a...
..., the clamping and conveying mechanism 7 is an endless chain 7
a and a clamping rail 7b, the clamping rail 7b
is connected to a frame (not shown) of a conveying device C via an inverted U-shaped frame 9.

The combine harvester is equipped with a handling depth adjustment device that maintains the insertion amount of the harvested grain culm supplied to the threshing device 1, that is, the handling depth, at a predetermined amount.

That is, as shown in FIG. 1, the handling depth adjustment device uses a stock source switch 10 provided in the pre-harvesting processing section 3 to detect the presence or absence of a grain culm, and a stock head switch 10 that detects the presence or absence of a grain culm, which is provided in the pre-harvesting processing section 3, and a handling depth adjustment device that controls the position of the tip of the grain culm that is sent through the conveying device C. Two sensors 11,1 to detect
2. A starting switch 13 for starting the handling depth adjustment device, a threshing switch 14 for detecting the operating state of the threshing device 1, a control device 15 as an example of a control means into which signals from these switches are input, and the control device a drive circuit 16 into which the signal from 15 is input;
It is constituted by an electric motor 17 that is operated by power from the drive circuit 16 and that moves the conveying device C by its operation.

Further, as shown in the same figure and FIGS. 2 and 3, the two sensors 11 and 12 are composed of contact type rods 11a and 12a and ON/OFF type switches 11b and 12b, respectively, and They are attached to the inverted U-shaped frame 9 at positions offset toward the culm of the culm, and are set to turn on when a grain culm is detected.

Of these two sensors 11 and 12, the one on the tip side is called the long culm sensor 11, and the one on the plant side is called the short culm sensor 12.
Appropriate threshing processing is performed with the tip side end of the grain culm located between the sensors 11 and 12.
The control system is configured such that the conveying device C is moved by feedback control in order to position the tip side end of the grain culm in the middle of the grain culm.

Further, as shown in FIG. 1, the electric motor 17
A rack gear 19 that meshes with a pinion gear 18 attached to the output shaft of is connected to a frame 20 that connects to the conveying device C, and as a result of the forward and reverse operation of the electric motor 17, the conveying device C moves up and down. The gripping position of the grain culm from the reaping device 5 is changed to adjust the handling depth.

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

That is, when the microprocessor starts operating, the control device 15 is set to an inactive state until a reference time has elapsed (step #1), and initial settings are performed (steps #2 and #3).

In this initial state, the moving speed of the conveying device C is set to high speed mode, and the short culm sensor
The ON counter S ₁ CNT and the short culm sensor OFF counter S ₀ CNT are each set to zero, and the long culm sensor OFF counter L ₀ CNT and the long culm sensor ON
Counters _L1CNT are each set to zero.

Next, the start switch 13 is turned ON, and as the work starts, the stock switch 10 is turned ON, and after the threshing switch 14 is turned ON, the state of the short culm sensor 11 is determined (# 2,
#4, #5, #6 steps).

Next, when the short culm sensor 11 is in the OFF state,
First, the edge short culm sensor OFF counter S ₀ CNT is incremented by one count (#7 step), and the value of the short culm sensor OFF counter S ₀ CNT is compared with a predetermined value K ₃ via #8 step (#9 step). ).

When the predetermined value _K3 is reached by counting up, the electric motor 17 is operated to the deep handling side by an intermittent signal (#10, #11 steps), and the predetermined value is
If _K3 has not been reached, it is determined whether the short culm sensor 11 was ON in step #6 in the previous process (step #12), and if it was ON, the short culm sensor ON counter is Count up S ₁ CNT by 1 count (#13 step),
Also, if it is OFF, the branched flow is #13
Merge with the flow from the step.

Next, when the process is repeated and 2 seconds have passed (step #14), the short culm ON counter S ₁
The value of CNT is compared with a predetermined value A, and if the value A has been reached, the electric motor 17 is operated to the deep handling side for a certain period of time (steps #15 and 16), and the short culm sensor
Set the ON counter S ₁ CNT to zero (step #17), and if the value of the short culm sensor ON counter S ₁ CNT does not reach the predetermined value A in step #15,
Short culm sensor merges with the flow from #16 step
Set ON counter S ₁ CNT to zero.

Also, if 2 seconds have not elapsed at #14 step, merge with the flow from #17 step, and
Set the long culm sensor OFF counter L ₀ CNT and the long culm sensor ON counter L ₁ CNT to zero (#18 step).

Also, if the low speed mode is set by the process described later, the process branches at step #8,
Short culm sensor OFF counter S ₀ CNT value and predetermined value K ₄
Compare with (#19 step).

If the predetermined value _K4 is reached by the count-up, the intermittent signal of step #10
The electric motor 17 is operated to the deep handling side using an intermittent signal set with a short ON time (#20, #11 steps), and if it has not reached the deep handling side, the flow goes from #9 step to #12 step. join together.

Also, if the short culm sensor 11 is in the ON state in step #6, the state of the long culm sensor 12 is determined (#21
Step), when the long culm sensor 12 is in the OFF state, after determining that the OFF state has been maintained for 0.5 seconds after branching, the moving operation speed of the conveying device C is set to low speed mode (#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 (steps #24 and #25).

In other words, setting the processing state to the flow of step #22 means that the tip side end of the transported grain culm is located between the long culm sensor 12 and the short culm sensor 11, and this processing state is set in the flow of step #22. From now on, the transport device C
The movement operation is performed at low speed.

Next, if the long culm sensor 12 is in the ON state in step #21, the long culm sensor ON counter _L1CNT is counted up by one (step #26), and if the long culm sensor ON counter is in the high speed mode, the long culm sensor ON counter is incremented by one. L ₁
The value of CNT is compared with a predetermined value _K1 (steps #27 and #28).

When the predetermined value _K1 is reached by counting up, the electric motor 17 is operated to the shallow handling side by an intermittent signal (steps #29 and #30), and the predetermined value is
If K ₁ has not been reached, it is determined whether the long culm sensor 12 was OFF in step #21 in the previous process (step #31), and if it was OFF, the long culm sensor 12 is turned OFF. Counter L ₀ CNT to 1
Count up only the count (#32 step),
Also, if it is ON, the branched flow is merged with the flow from step #32.

Next, when the process is repeated and 2 seconds have passed (step #33), the value of the long culm sensor OFF counter L ₀ CNT is compared with a predetermined value A, and if this value A has been reached, The electric motor 17 is operated to the shallow handling side for a certain period of time (#34, #35 steps), and the long culm sensor OFF counter L ₀ CNT is set to zero (#36 step), and the long culm sensor OFF counter is set to zero (#36 step). sensor
If the value of the OFF counter _L0CNT has not reached the predetermined value A, the long culm sensor OFF counter _L0CNT is set to zero by joining the flow from step #35.

Also, if 2 seconds have not elapsed at #33 step, merge with the flow from #36 step, and
Set the short culm sensor OFF counter S ₀ CNT and the short culm sensor ON counter S ₁ CNT to zero (#37 step).

If it is the low speed mode, the process branches at step #27, and the value of the long culm sensor ON counter _L1CNT is compared with a predetermined value _K2 (step #38).

If the predetermined value is reached by the count-up, the electric motor 17 is activated with an intermittent signal whose ON time is shorter than the intermittent signal in step #29.
to the deep handling side (#39, #30 steps), and
If it has not reached it, it joins the flow from step #28 to step #31.

In other words, in step #15, if the short culm sensor 11 is repeatedly turned ON and OFF within 2 seconds before the electric motor 17 is intermittently operated to the deep handling side, this state is changed to the position of the short culm sensor 11. This is a process for determining that the tip side ends of the grain culms to be transported are substantially coincident, and when it is determined in this way, the magnitude of the value A is set to set the state of deep handling, and similarly, # The magnitude of the value A is set so that it is determined that the tip side end of the grain culm to be transported is substantially coincident with the position of the long culm sensor 12 even in the 34th step, and the grain culm to be transported is set to a shallow handling state.

Furthermore, if the short culm sensor 11 is in the OFF state in step #6, the count is incremented in step #7, and as a result, the value of the short culm sensor OFF counter _S0CNT reaches the predetermined value _K4 in step #19. The value of K ₄ is set to make the time 1 second, and #9
Short culm sensor OFF counter at predetermined value _K3 of step
The time to reach the S ₀ CNT value should be less than 1 second.
A value of _K3 is set.

Similarly, as a result of being counted up in step #26, the time required for the value of the long culm sensor ON counter (L ₁ CNT) to reach the predetermined value (K ₂ ) in step #38 is calculated.
The value of K ₂ is set to 0.3 seconds, and #28
Long culm sensor ON counter L ₁ at predetermined value K ₁ of step
K ₁ so that the time to reach the CNT value is 0.3 seconds or less
The value of is set.

Also, the combine harvester reached the headland and the stock switch 1
Once 0 has been turned OFF, when work is restarted, the high speed mode is set and at the same time each of the four counters is set to zero (#40, #3 steps). .

[Another example]

In addition to the above-mentioned embodiments, the present invention may be configured such that, for example, a hydraulic actuator is used to move the conveyance device, or a preset counter counts sensor switching and a timer is used to operate the actuator. , logic gates, etc., may be implemented.

[Brief explanation of the drawing]

The drawings show an embodiment of the handling depth adjusting device according to the present invention, FIG. 1 is a block diagram showing the configuration of the adjusting device, FIG. 2 is a front view showing the mounting position of the sensor,
Figure 3 is a plan view showing the mounting position of the sensor;
The figure is a side view of the front part of the combine, and FIG. 5 is a flowchart showing the operation of the control device. 6...Feed chain, 11, 12... Sensor, 15... Control means, C... Conveying device.

Claims (1)

[Scope of utility model registration request] A conveying device C configured to be able to change the clamping position of the harvested grain culm by a moving operation is provided, and the conveying device C
A pair of sensors 1 for detecting the position of the tip of the grain culm are provided on the grain culm conveyance path from the grain culm to the threshing feed chain 6.
1 and 12 are provided, and these pair of sensors 11 and 12
The conveyance device C is moved and operated so that only the sensor 12 on the plant side detects the grain culms, and after the sensor 12 on the plant side changes from the sensing state to the non-sensing state, the non-sensing state is maintained for a set period of time. The handling depth adjustment device has an operation delay time set so as to move the grain culm to the deep handling side, and the sensor 12 on the plant side detects the presence of the grain culm. Control means 15 is provided to move the conveying device C by a set amount toward the deep handling side when the switching from the state to the non-sensing state occurs more than a set number of times within a predetermined time longer than the set time. Adjustment device.