JP2599822B2 - Threshing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sheave sensor for detecting a thickness of a layer of a processed material on a swing sorting plate, and a chaff sheave in the swing sorting plate based on the detected amount. The present invention relates to a threshing device provided with control means for controlling the opening of the threshing machine.

[Conventional technology]

An example of such a threshing apparatus, in particular, an opening control apparatus for a shuff sheave is disclosed in Japanese Utility Model Laid-Open No. 59-77346. In this conventional example, if the thickness of the layer of the processed material on the chaff sheave is equal to or less than a predetermined value, one contact is closed,
A sensor switch for closing the other contact when a predetermined value is exceeded is provided. The opening degree of the chaff sheave is adjusted depending on which of the contacts is in the closed state (the other contact is in the open state). However, the respective contacts of the sensor switch are directly connected to a pair of solenoids for driving a hydraulic device for adjusting the opening degree of the chief sheave without any intervening control means. In other words, the sensor switch operates like an alternative changeover switch according to the thickness of the layer of the workpiece to excite one of the solenoids.

[Problems to be solved by the invention]

The above-described conventional chief sheave opening control device has the following disadvantages. First, since one of the solenoids is always excited, it is difficult to meet the demand for power saving. Further, this is not preferable for the life of the solenoid. Secondly, since the supply destination of the hydraulic oil is merely switched by the on / off control of the solenoid, the opening / closing speed of the chaff sheave becomes the same both when operating to the opening side and when operating to the closing side. There is a disadvantage that it is difficult to stabilize the sorting control at the same time in a state where the sorting performance of the chaff sheave can be properly maintained.

In other words, when the opening / closing speed of the chaff sheave is increased, the operation to the opening side when the detection amount of the sheave sensor is increased becomes faster, and clogging of the processed material on the chaff sheave can be quickly avoided, but the detection amount is reduced. When the operation to the closing side is too fast, the operation to the closing side is likely to be impaired, and the operation to the closing side is detected as an operation result. On the contrary, the detection amount of the sheave sensor becomes large, and excessive control such as the opening operation is started, so that it is difficult to stabilize the sorting control.On the contrary, if the opening and closing speed of the chaff sheave is reduced, Although it is easy to stabilize the sorting control, it is not possible to avoid clogging of the processed material on the chaff sieve quickly, and the sorting performance of the chaff sieve is impaired. There are precautions may cause.

The present invention has been made in view of such circumstances, and its purpose is to meet the demands for power saving and long life, and at the same time, to keep the sorting performance of the chaff sieve properly, An object of the present invention is to provide a threshing device which can easily stabilize control.

[Means for solving the problem]

A feature configuration of the present invention for achieving the above object is a sheave sensor that detects a thickness of a layer of a processed material on a swing sorting plate,
A threshing apparatus provided with control means for controlling an opening degree of the chaff sheave in the swing sorting plate based on the detected amount, wherein a driving means capable of changing the opening degree of the chaff sheave and changing the speed is provided. The control unit is provided, in a state where the speed of operating the chaff sheave to the opening side is faster than the speed of operating the chaff sheave to the closing side, and when the detection amount of the sheave sensor becomes equal to or more than an upper limit value of a predetermined range, the control unit moves the chief sheave to the opening side. The driving means is controlled so as to be operated, and to be operated to the closing side when it becomes lower than the lower limit value.

(Operation)

When the detection amount of the sheave sensor is equal to or more than the upper limit value of the predetermined range, the control means activates the chaff sheave to the open side, and when the detection amount of the sheave sensor is equal to or less than the lower limit value, it operates to the close side. The opening of the chaff sheave is maintained as it is. That is, the predetermined range is a dead zone, and the control means does not open or close the chaff sheave. The chaff sheave is actuated to the open side only when it exceeds the upper limit of the predetermined range, and conversely, it is actuated to the close side only when it falls below the lower limit.

Further, a driving unit that can change the opening degree of the chaff sheave and change the speed is provided, and the control unit controls the driving unit in a state where the speed of operating the chaff sheave to the opening side is faster than the speed of operating the chaff sheave to the closing side. Because of the control, the clogging of the processed material on the chaff sheave can be avoided quickly by the fast operation to the open side when the detection amount of the sheave sensor is large, and the operation to the closed side when the detection amount is small is opened. The processing object can be prevented from being caught in the chaff sheave, and the control can be performed while appropriately monitoring the detection amount of the sheave sensor as an operation result.

〔The invention's effect〕

Therefore, when the detected amount of the sheave sensor is in the dead zone, the chaff sheave is not opened and closed, which meets the requirements for power saving and long life. In the operation to the closing side, it is possible to control while properly monitoring the detection amount of the sheave sensor as an operation result, so that the sorting performance of the chaff sheave can be appropriately maintained, and at the same time, the sorting control is performed. Is easy to stabilize.

〔Example〕

Hereinafter, an example in which the present invention is applied to a threshing device mounted on a combine will be described with reference to the drawings.

As shown in FIG. 1, the threshing apparatus comprises a handling room (A) for accommodating a handling drum (2) for handling and processing the harvested grain culm conveyed by the feed chain (1), and the handling room (A). ), And a sorting device (B) provided with a rocking sorting plate (3) that sorts the leaked material from (1) and Karamin (4) that blows the sorting wind. In the lower part of the handling room (A), the handling cylinder (2)
A receiving net (5) for leaking threshing products is provided along the lower outer peripheral portion, and threshing products remaining in the handling room (A) behind the receiving net (5). An opening (6) for discharging the gas is formed.

The rocking sorting plate (3) includes a Glen pan (7), a chaff sheave (8), and a straw rack (9), which are sequentially arranged from the front to the rear,
Below the chaff sheave (8), an auxiliary Glen pan (10) and a Glen sheave (11) are arranged in order in the front-rear direction, respectively, and their respective parts are fixed between a pair of left and right side plates (12). It is formed in a plate shape as a whole. Further, a lowermost part of the sorting device (B) is provided with a first-part collecting section (13) for collecting kernels leaking from the Glen Sheave (11) as a first thing, and an end part of the straw rack (9). To collect the processed material (hereinafter, abbreviated as a second product) in which straw chips and the like and the grains falling over the end of the Glen Sheave (11) are mixed and returned to the handling chamber (A). And a second product recovery section (14). In the figure,
(15) is a thrower for returning the second product to the handling room (A).

As shown in FIG. 3, the chaff sheave (8) has a plurality of strip-shaped members (8a) juxtaposed in the processing object transfer direction, each of which has its upper end serving as a fulcrum with respect to the left and right side plates (8b). It is attached rotatably. By pushing and pulling the operating rod (16) pivotally attached to the lower end of each strip-shaped member (8a) in the front-rear direction, the angle of each strip-shaped member (8a) is simultaneously changed. As a result, the interval (p) between adjacent ones of the strip-shaped members (8a) (hereinafter, abbreviated as chaff opening) can be changed and adjusted.

A DC motor (M) for electrically changing and adjusting the opening degree of the chaff is provided, and the operating rod (16) is connected via a gear-type linkage mechanism (17), a swing arm (17a), and a release wire (18). ). (19) is a spring which urges the chaff opening to return to the closing side. The motor (M) is driven forward and reverse by a variable speed drive (DR), and its rotational speed is changed and controlled. Therefore, the motor (M) and the variable speed drive (DR) constitute a drive unit that can change the opening of the chaff sheave (8) and change the speed thereof. Further, a control device (H) using a microcomputer is provided as control means for controlling the opening of the chaff sheave (8).

The control device (H) gives a control signal for opening and closing the chaff sheave (8) to the speed change drive device (DR) based on detection information of a sheave sensor (S) described later. Specifically, it is a start signal and a stop signal of the opening operation or the closing operation, and a pulse signal having a duty ratio according to the operation speed. The variable speed drive (DR) applies and stops the drive voltage of the motor (M) in response to a control signal from the control device (H), and switches its polarity, thereby changing the rotation direction of the motor, that is, the chief sheave (8). Switch the opening and closing direction. Further, the drive voltage is changed by PWM control to change the rotation speed of the motor (M), that is, the opening / closing speed of the chaff sheave (8).

Next, a configuration for detecting the thickness of the layer of the processing object on the swing sorting plate (3) will be described. As shown in FIG. 1 and FIG. 2, a sheave sensor (S) for detecting the thickness of the layer of the processing object on the bow (20) fixed to the receiving net (5).
Is attached. The sheave sensor (S) has a plate-like contact (21) whose upper part is pivotally supported and whose lower part is rotatable in the transfer direction (rearward) of the processing object, and a rotation angle of the contact (21). Potentiometer (P
M). The signal line of the potentiometer (PM) is connected to the control device (H).

The contact (21) has a rearward rotation angle which varies depending on the thickness of the layer of the processing object on the chaff sheave (8). That is,
As the layer of the processing object becomes thicker, the backward rotation angle of the contact (21) becomes larger. Therefore, the control device (H) can know the thickness of the layer of the processing object from the resistance value of the potentiometer (PM). In addition, since the distance between the swing selection plate (3) and the sheave sensor (S) periodically changes with the swing of the swing selection plate (3), the rotation angle of the contact (21), and hence the potentiometer. The resistance value of (PM) also changes accordingly.
Therefore, the control device (H) determines the thickness of the processing object layer from the resistance value of the potentiometer (PM).
The average value over a period longer than the oscillation cycle of the oscillation selection plate (3) is taken, and this is used as the detection amount according to the thickness of the processed material layer.

The control device (H) controls the opening and closing of the chaff sheave (8) based on the detected amount as described above. Basically, when the thickness of the layer of the processing object becomes equal to or more than the upper limit value of a predetermined range (dead zone), the chaff sheave (8) is operated to the opening side to increase the leakage amount of the processing object. Conversely, when the thickness of the layer of the processed material becomes equal to or less than the lower limit of the dead zone, the chaff sheave (8) is operated to the closed side to reduce the leakage amount of the processed material. In this manner, stable sheave operation performance is maintained by keeping the thickness of the processed material layer substantially constant.

Abrupt opening / closing control of the chaff sheave (8) is not preferable from the viewpoint of stability of the sheave operation performance. On the other hand, if the amount of processed material suddenly increases for some reason, it is necessary to open the chaff sheave (8) quickly to prevent clogging. Therefore, the control device (H) performs control to change the speed at which the chaff sheave (8) is operated to the opening side and the speed at the time of operating the chaff sheave (8) to the closing side as described above. That is, the operation to the opening side is faster than the operation to the closing side. In this way, the sheave operation performance as stable as possible can be obtained while preventing clogging of the processed material.

(Another embodiment)

The mounting position of the sheave sensor (S) is not limited to the position in the above-described embodiment, and may be provided, for example, above the Glen pan (7). Also, by providing a plurality of sheave sensors at a plurality of positions,
It is also conceivable to improve the detection accuracy by averaging the detected amounts.

In the embodiment, the upper limit value and the lower limit value of the dead zone of the sheave sensor (S) are fixed values stored in the microcomputer in advance. However, it is more convenient if a keyboard or a changeover switch can externally change and set as necessary. It is.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of the drawings]

The drawings show an embodiment of a threshing apparatus according to the present invention, FIG. 1 is a cross-sectional view of a main part viewed from the side of the threshing apparatus, FIG. FIG. 4 is an explanatory view showing an opening and closing mechanism and control of a chaff sheave. (3)… rocking sorting plate, (8)… chaff sieve,
(H) Control means, (S) Sheave sensor.

Continuing on the front page (72) Takao Mizoguchi, 64 Ishizukitamachi, Sakai City, Osaka Prefecture Inside Kubota Sakai Factory, Inc. ) Inventor Kazuhiro Takahara 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Sakai Works Co., Ltd. (56) References JP-A-61-173715 (JP, A) JP-A-60-199317 (JP, A)

Claims (1)

(57) [Claims] 1. A sheave sensor (S) for detecting the thickness of a layer of a processed material on an oscillating sorting plate (3), and a chief sheave (8) of the oscillating sorting plate (3) based on the detected amount. A threshing apparatus provided with a control means (H) for controlling an opening degree, wherein a driving means capable of changing an opening degree of the chaff sheave (8) and changing a speed thereof is provided, and the control means (H ) Is a state in which the speed of operating the chaff sheave (8) to the open side is faster than the speed of operating the chaff sheave (8) to the closed side
A threshing device that controls the driving means to operate the chaff sheave (8) to the open side when the detection amount of the sheave sensor (S) is equal to or more than an upper limit value of a predetermined range, and to operate the chaff sheave (8) to the close side when the detection amount is equal to or less than the lower limit value.