JPH05161416A - Dust feed valve controller for thresher - Google Patents

Abstract

PURPOSE:To properly carry out the automatic regulation of opening degree of a dust feed valve according to conditions of crops. CONSTITUTION:In a dust feed valve controller of a thresher equipped with a controlling means (H) for controlling the opening and closing of a dust feed valve 13 installed in a threshing chamber through an opening and closing driving means (M), a crop setting means 24 for changing over conditions of the object crop for threshing is provided and the controlling means (H) is constructed so as to set the target opening degree of the dust feed valve 13 according to the changeover position of the crop setting means 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust control valve control device for a thresher equipped with a control means for controlling the opening and closing of a dust control valve provided in a handling chamber through an opening and closing drive means.

[0002]

2. Description of the Related Art A dust delivery valve provided in a handling chamber is for accelerating or suppressing a movement of a handling barrel of a crop to be threshed (grain culm) in a direction of an axis of rotation. Conventionally, by controlling the opening of the dust delivery valve according to the amount of grain culm supplied to the handling chamber, the retention time of the grain culm in the handling chamber is adjusted, and thus control to improve threshing performance is performed. There is.

[0003]

However, since the control is performed regardless of the conditions such as the type of crop and the shedding habit, it cannot always be said that the dust control is appropriate. On the other hand, the opening of the dust delivery valve is also manually adjusted, but in this case, some skill is required, and the opening of the dust delivery valve remains inadequate due to adjustment error or forgetting adjustment. There is also a risk of threshing. By the way, when the opening of the dust delivery valve becomes smaller than the appropriate opening, the movement (discharging) of the grain culvert becomes slow, and damaged grains and sloughing due to excessive threshing occur. On the contrary, when the opening of the dust delivery valve is larger than the appropriate opening, the grain culms are discharged quickly while the threshing is insufficient, which causes problems such as an increase in the second reduction product and the third loss.

The present invention has been made in view of the above circumstances, and an object thereof is to appropriately perform automatic opening degree adjustment of a dust feeding valve in accordance with crop conditions.

[0005]

A dust control valve control apparatus for a threshing device according to the present invention is provided with a control means for controlling opening / closing of a dust control valve provided in a handling chamber through opening / closing drive means. There, the characteristic configuration is provided with crop setting means for switching the conditions of the threshing target crop, the control means, so as to set the target opening of the dust delivery valve according to the switching position of the crop setting means. It is in the point that is configured. The switching of the conditions of the threshing target crop means, for example, switching of the type of crop (rice, wheat, soybean, etc.) or switching between cases where the threshing property is good and bad.

[0006]

According to the above characteristic structure, the operator only needs to appropriately switch and set the crop setting means. After that, the control means sets the target opening degree of the dust feeding valve according to the switching position of the crop setting means, and controls the opening / closing of the dust feeding valve via the opening / closing drive means.

[0007]

Therefore, it is possible to automatically adjust the opening degree of the dust sending valve in accordance with the condition of the crop.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 5 shows a side view of the entire combine. A cockpit 2, a threshing device 3 and the like are mounted on a machine body V including a pair of left and right crawler traveling devices 1, and a cutting device 4 is provided in front of the machine body V so as to be vertically movable. The mowing device 4 includes a weeding tool 5, a scraping device 6, a mowing blade 7, an auger 8 for collecting the crops collected in the lateral center of the machine body, and a conveyor 9 for conveying the collected crops to the threshing device 3. ing.

The threshing device 3 includes a threshing section (hereinafter referred to as a handling room) A having a handling barrel 10 and a receiving net 11 which rotate around the longitudinal axis of the machine body V, and a leakage process from the handling room A. It consists of a sorting unit B that sorts and collects grains from the object. Sorting section B
Although details are not shown, a swinging sorting plate for separating and sorting grains and straw waste, a thyme that generates a wind that blows away straw waste, a collection device that collects the sorted grain, etc. are provided. Has been.

Crop (grain culm) such as rice, wheat, soybean, etc., which is mowed by the reaping device 4 and conveyed to the threshing device 3 by the auger 8 and the conveyor 9, is supplied to the handling room A and is rotated by the handling barrel 10. Threshed. At the front of the handling room A, a grain culm sensing switch S1 for detecting whether or not grain culm is supplied.
Is provided. The grain culm detection switch S1 is attached inside the ceiling cover 12 of the handling room A, as shown in FIG.
It is composed of a contact piece that swings down in the direction of rotation of the handling cylinder 10, and a switch that turns on when the contact piece swings due to the contact of the grain stem. Therefore, the grain culm sensing switch S1 is turned off when the grain culm is not supplied to the handling room A, and is turned on when the grain culm is supplied.

The grain culm (processed material) in the handling room A is transferred to the rear of the machine while threshing by the handling teeth spirally provided around the handling barrel 10 and transferred from the rear end of the receiving net 11 to the sorting section. B
To fall. Then, after the dust particles and the like are collected by the swing selection plate, the straw waste is discharged to the outside of the machine. The dust transfer valve 13 for adjusting the residence time in the treatment chamber of the treatment chamber by facilitating or suppressing the rearward transfer of the treatment substance in the handling chamber and thus optimizing the threshing condition is provided in the ceiling of the treatment chamber. It is provided on the inner surface of the cover 12.

As shown in FIGS. 6 and 7, a plurality of plate-like dust-sending valves 13 are arranged at predetermined intervals in the direction of the axis of rotation of the handling cylinder. Each dust-sending valve 13 is pivotally attached to the ceiling cover 12 so as to be rotatable about a vertical axis, and the whole dust-sending valve 1 is provided by link mechanisms 14 and 15 provided outside the ceiling cover 12.
3 is configured to rotate simultaneously while maintaining the parallel state.

That is, a link 14 which rotates together with each dust feed valve 13 is pivotally connected by a single link 15, and a rotation angle (opening) of each dust feed valve 13 is simultaneously controlled by a motor M within a predetermined range. It is configured to be modifiable. This motor M
Are driven in the forward and reverse directions by the control means described later. or,
A potentiometer type dust delivery valve opening sensor S2 for detecting the rotation angle (opening) of the dust delivery valve 13 is provided.

Rotation range of the dust delivery valve 13 (opening adjustment range)
Is restricted from the position (+ 20 °) indicated by the broken line in FIG. 7 to the position (−10 °) indicated by the alternate long and two short dashes line. The position indicated by the broken line is the fully opened state, and in this state, the backward transfer of the processed material is most promoted. On the contrary, in the fully closed state indicated by the chain double-dashed line, the backward transfer of the processed material is most suppressed.

Next, the open / close control of the dust sending valve 13 will be described. As shown in FIG. 1, a control means H for controlling the opening and closing of the dust-sending valve 13 via an opening-and-closing driving means composed of a motor M and the like.
Is provided. The control means H is configured by using a microcomputer, and turns on (L level) one of the two outputs 16 and 17 to close one of the two relays 18 and 19 to the Vcc side. Then, the motor M is normally or reversely rotated. Then, the dust delivery valve 13
Is opened and closed as described above, and its opening is fed back to the control means H by the dust sending valve opening sensor S2.

In the figure, reference numeral 20 is a changeover switch with a neutral position for manually opening and closing the dust sending valve. Also 21,2
Reference numeral 2 denotes a limit switch, which is turned off when the dust-sending valve 13 reaches the limit of the above-described rotation range, that is, the fully open state or the fully closed state, and shuts off the exciting current of the relay 18 or the relay 19. The limit switches 21 and 22 are omitted in FIG.

As shown in FIG. 1, the control means H is input with information on various sensors and switches in addition to the grain culm sensing switch S1 and the dust sending valve opening sensor S2 described above.
Threshing clutch switch S3, Mowing clutch switch S4
Is a switch that is turned on when the threshing clutch or the reaping clutch is in the connected state. That is, the control means H knows from the signals that the combine is threshing or reaping.

The electromagnetic pickup S5 generates a sine wave having a frequency proportional to the engine speed and gives it to the control means H. The vehicle speed sensor S6 is provided in the mission unit, and generates a signal of a pulse number proportional to the rotation speed of the drive wheels of the crawler traveling device 1 and gives it to the control means H. The dust-sending valve auto switch 23 is a switch for switching whether or not to execute the automatic opening / closing control of the dust-sending valve described below, and the crop selection switch 24 is a switch for switching according to the crops to be cut or threshed (rice, wheat, soybean, etc.). It corresponds to a crop setting means. The dust delivery valve adjustment VR25 is a variable resistor for adjusting the opening of the dust delivery valve according to the grain shedding property of the crop.

Next, the dust feed valve control executed by the control means H based on the above input information will be described with reference to the flowcharts of FIGS. 2 and 3. First, in the process (a), the starting condition of the automatic opening / closing control is checked. That is, if the dust-feed valve auto switch 23, the threshing clutch switch S3, and the reaping clutch switch S4 are on and the engine speed is 2000 rpm or more, the start condition is satisfied (b).
The process moves to the following process, but if one of the conditions is not satisfied, the process branches to the output stop process (turns off the outputs 16 and 17).

In the process (b), the load on the threshing device 3 is detected from the decrease in the engine speed during the cutting and threshing work. That is, the maximum value of the engine speed when the vehicle speed is less than 0.1 m / s is stored as the reference speed (R), and the current engine speed when the vehicle speed becomes 0.1 m / s or more is stored. The difference from the value (r) is calculated as the load L. The obtained load L includes loads other than the threshing device 3, such as the traveling device 1 and the mowing device 4, but the proportion of the threshing device 3 is large, and the change in other loads is relatively small, so that it is convenient. It is regarded as the load of the threshing device 3. Therefore, the load detecting means 26 for detecting the load of the threshing device 3 is configured inside the control means H.

Next, in the process (c), the switching position of the crop changeover switch 24 is checked, and the process branches to the process of setting the target opening degree of the dust feeding valve 13 according to the switching position. That is, soybeans,
In the case of wheat, as shown in FIGS. 4 (a) and 4 (b), respectively, a larger target opening degree is set as the set value of the dust delivery valve adjustment VR25 becomes larger, that is, as the grain shedding property of the crop becomes worse. Actually, however, a data table obtained by quantizing the relationship between the set value of the dust control valve VR25 and the target opening degree (°) with a predetermined roughness as shown in FIGS. 4 (a) and 4 (b) is obtained. It is stored in the memory in the control means H, and the control means H obtains the target opening degree from the data table. The same applies to FIG. 4C described later. In addition, dust control valve adjustment VR2
The set value of 5 is shown by replacing the value obtained by A / D converting the change in the resistance value (voltage value) with a value of 1 to 5 for convenience.

When the crop switching position is rice, 5 seconds immediately after the grain culm sensing switch S1 is turned on, that is, immediately after the start of threshing, and after that are distinguished. 5 seconds immediately after the start of threshing is determined from the relationship with the set value of the dust delivery valve adjustment VR25 shown in FIG. 4 (c), as in the case of soybeans and wheat. As can be seen from FIGS. 4 (a), 4 (b), and 4 (c), the opening degree of the dust delivery valve decreases in the order of soybean, wheat, and rice. This is due to the difference in easiness of shedding (shedding ability).

After 5 seconds have passed since the grain culm sensing switch S1 was turned on, as shown in FIG. 4 (d), the load (decrease in engine speed) L calculated in the process (b).
Change the target opening according to (rpm). That is, although it is a stepwise change as shown in the figure, the target opening is increased as the load L is increased (as a result, the opening of the dust delivery valve 13 is increased). This is because the heavier the threshing load is, the larger the amount of the processed material in the handling room A becomes and the excessive threshing is performed. Therefore, the processed material is transferred to the rear faster and the residence time in the handling room A is shortened. Further, it also prevents the engine from being stopped due to a clogged state of the processed material or an overload.

However, as shown in FIG. 4D, the target opening when the load L is the same is changed according to the set value of the dust transfer valve adjustment VR25. That is, the larger the set value of the dust delivery valve adjustment VR25, that is, the poorer the grain shedding property of the crop, the larger the target opening degree. In FIG. 4 (d), the target opening is changed by dividing the set value of the dust sending valve adjustment VR25 into three stages, but it may be divided more finely.

Once the target opening corresponding to each crop is obtained, the opening / closing operation of the dust sending valve 13 is performed in the process (d) and thereafter. First, the deviation between the target opening and the current opening is calculated.
Here, the present opening degree is a value obtained from a signal fed back to the control means H by the dust sending valve opening degree sensor S2. If the deviation is within the allowable range (dead zone), the output stop is executed. If the deviation is negative, that is, too close, the closed output is executed, and if the deviation is positive, that is, too close, the open output is executed.

The output stop is a process of turning off the output 16 and the output 17 as described above.
Operation is stopped. The open output is a process of turning on the output 16 (L level) and turning off the output 17, and
The motor M is driven in the normal direction and the dust sending valve 13 is operated in the opening direction. Closed output turns on output 17 (L level), output 17
Is a process for turning off the motor M, whereby the motor M is driven in reverse and the dust sending valve 13 is operated in the closing direction.

Other examples will be listed below. In the above-described embodiment, it is also possible to perform the following transient dust delivery valve control in order to improve the unstable state of the threshing state at the end of cutting and the start of cutting as much as possible. For example, when the grain culm detection switch is turned off at the end of mowing, the target opening of the dust sending valve is made equal to the target opening when the load is zero. Alternatively, the (target) opening of the dust sending valve when the grain culm detection switch is turned off is stored and the
As the threshing is restarted, the target opening of the dust sending valve is maintained at the stored opening for a predetermined time.

The crop setting means is not limited to the crop changeover switch of the above-described embodiment, but may be, for example, one for changing the quality of shattering, or one for changing the amount of seeding. The specific configuration of the dust delivery valve and its opening / closing drive means is not limited to the configuration of the above-described embodiment, and various changes can be made. The present invention is not limited to the combine as in the above-described embodiment, but can be applied to a threshing device such as a harvester called a harvester.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a block diagram of a dust delivery valve control device of a threshing device according to an embodiment of the present invention.

[Fig. 2] Flow chart of dust control

[Figure 3] Flow chart of dust control

FIG. 4 is a graph for obtaining a target opening of a dust delivery valve

FIG. 5 is a side view of the combine.

FIG. 6 is a partial sectional view of a threshing device.

FIG. 7 is a plan view of a threshing device showing a dust delivery valve.

[Explanation of symbols]

 13 Dust supply valve 24 Crop setting means A Handling room H Control means M Opening / closing drive means

Claims (1)

[Claims] 1. A dust delivery valve (13) provided in the handling chamber (A).
Is a dust-feeding valve control device of a threshing device provided with a control means (H) for controlling opening and closing via an opening and closing drive means (M), the crop setting means (2) for switching conditions of a threshing target crop.
4) is provided, and the control means (H) is configured to set the target opening degree of the dust sending valve (13) according to the switching position of the crop setting means (24). Dust control valve control device.