JPH0520A - Abnormality detection device for threshing device - Google Patents

Abstract

(57) [Summary] [Purpose] To accurately detect the clogging of the lower part of the rocking sorting plate. [Structure] Grain culm supply detecting means for detecting whether or not grain culm is supplied to a threshing device, layer thickness detecting means for detecting a layer thickness of a processed material on an oscillating sorting plate, and the oscillating movement. Leakage opening detection means for detecting the processing material leakage opening of the sorting plate is provided,
Based on the detection information of these detecting means, the judging means judges that the layer thickness of the processed material does not decrease by a set value or more within a predetermined time after the cereal culm is no longer supplied to the threshing device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain culm supply detecting means for detecting whether or not grain culm is being supplied to a threshing device, and a layer for detecting the thickness of a layer of a processed material on a rocking sorting plate. The present invention relates to an abnormality detecting device for a threshing device provided with a thickness detecting means.

[0002]

2. Description of the Related Art Conventionally, in a control device for a threshing device provided with such a layer thickness detecting means, when the layer thickness of the processed material on the rocking sorting plate becomes a predetermined value or more, or in that state. However, if it continues for a predetermined time or longer, it is determined that a clogging condition of the processed object has occurred and an alarm is issued.

[0003]

However, the clogging state of the processed material is not always detected only by this detection method. In other words, the amount of so-called second product that falls from the rear end of the spilled portion and is collected together with straw scraps even if the grain cannot be spilled from the spilled portion due to clogging at the spilled portion of the swing selection plate. Or, the amount of so-called third item discharged outside the machine increases,
The thickness of the layer of the processed material on the rocking sorting plate may not reach a predetermined value that is judged to be abnormal.

If the threshing and selecting operation is continued in this state, the second object which has not been adequately selected is shaken while the first object which should be originally leaked and recovered from the lower part of the rocking sorting plate is not obtained. Only the operation of returning to the dynamic selection plate is repeated. Moreover, the so-called third loss, in which the grains are mixed and discharged into the third one, increases, so it is necessary to detect such an abnormal condition as quickly as possible and perform processing such as alerting the operator. ..

The present invention has been made in view of the above situation, and an object thereof is to accurately detect the clogging state of the lower portion of the swing sorting plate as described above.

[0006]

An abnormality detecting device for a threshing device according to the present invention comprises a grain culm supply detecting means for detecting whether or not grain culm is supplied to the threshing device, and a processed product on an oscillating sorting plate. An abnormality detecting device for a threshing device provided with a layer thickness detecting means for detecting the thickness of the layer, the characteristic configuration of which is based on the detection information of the both detecting means, to supply the grain culm to the threshing device. There is a determination means for determining an abnormality if the layer thickness of the processed material does not decrease by a set value or more within a predetermined time after disappearance.

[0007]

As described above, in a state in which the grain cannot be leaked from the lower part of the rocking sorting plate due to clogging in the lower part, the processed product containing the grain on the rocking sorting plate is It falls from the rear end of the rocking sorting plate together with straw waste, and is mainly collected as a second product and returned to the rocking sorting plate. Therefore, even if the grain culm is no longer supplied to the threshing device, the layer thickness of the processed material on the rocking sorting plate does not easily decrease.

Therefore, according to the above characteristic structure, the discriminating means detects the processed matter detected by the layer thickness detecting means within a predetermined time after the cereal culm supply detecting means knows that the cereal culm supply to the threshing device has disappeared. If the thickness of the layer does not decrease more than the set value, it is determined to be abnormal. For example, a storage area for storing the layer thickness of the processed material is provided, and the storage value is updated every time the grain culm supply to the threshing device is detected, and the grain culm supply to the threshing device is not detected. For example, the current value of the layer thickness of the processed product is compared with the stored value. Then, if the difference between the current value and the stored value does not become the set value or more even after the lapse of a predetermined time, it may be determined to be abnormal.

[0009]

As described above, it is possible to accurately detect an abnormality caused by the clogging of the lower portion of the swing selection plate by the simple processing described above.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a combine threshing device will be described below with reference to the drawings.

The self-removing combine shown in FIG. 2 comprises a pair of left and right crawler traveling devices 1, a threshing device 2, a control section 3, a cutting section 4, and the like. The cutting unit 4 includes a weeding tool 5, a planting grain culm raising device 6, and a cutting blade 7, and the cut grain culm is fed by a conveying device 9 to a feed chain 16 of the threshing device 2.
Be transported to. In addition, a stock origin sensor S1 as a grain culm supply detecting means for detecting whether or not grain culm is being supplied to the threshing device 2 is provided at the tip of the transport device 9.

The power transmission system is constructed as shown in FIG. The power of the engine E is transmitted to the threshing device 2 via the threshing clutch 10 and is transmitted to the mission unit 13 of the crawler traveling device 1 via the traveling clutch 11 and the hydraulic continuously variable transmission 12. Power is transmitted to the mowing unit 4 from the mission unit 13 via the mowing clutch 14. Further, in order to detect whether or not the threshing device 2 is operating, a threshing switch SW1 for detecting the on / off state of the threshing clutch 10 is provided.

The threshing device 2, as shown in FIG.
5, a handling room A for housing 5, a feed chain 16 for feeding the grain culms supplied from the mowing section 4 to the handling room, a cross-flow fan 17 for dust removal, and a toumi 18 for selecting a processed product after threshing.
And a swinging sorting plate 19, a first port 20 and a second port 21 for collecting the processed products after sorting.

The culm supplied to the handling room A is threshed by the rotation of the handling barrel 15. A receiving net 22 is provided in the lower part of the handling room A, and grains of the processed product after threshing that have been made into single grains leak from the receiving net 22 to the rocking sorting plate 19. The processed material that could not leak from the receiving net 22 falls from the rear end of the receiving net 22 to the swing selection plate 19.

The swing selection plate 19 comprises a Glen pan 23 located above the tomi 18, a chaff sheave 24 located behind it, a Glen sheave 25 located below it, and the like. Grains that have leaked from the chaff sheave 24, which is the leaky lower part of the swing selection plate 19, and further leaked from the grain sieve 25, are collected from the first port 20 and stored in a tank or the like. The mixture of the grain and the straw dust that has fallen from the rear end of the chaff sheave 24 or the rear end of the Glen sieve 25 is recovered from the No. 21 mouth and returned to the swing selection plate 19.

The chaff sheave 24, as shown in FIG.
A plurality of strip-shaped members 24a juxtaposed in the processed material transfer direction
Each of these is rotatably attached to the left and right side plates. When the link 25 pivotally attached to the lower end of each strip plate member 24a is moved in the front-rear direction, the angle of each strip plate member 24a is simultaneously changed. as a result,
While keeping the parallelism of each strip-shaped member 24a, the adjacent distance t
(Hereinafter, referred to as the chaff sheave opening) is changed.

A sheave motor M1 for electrically changing and adjusting the chaff sheave opening is provided, and is connected to the operating rod 25 via a gear type linkage mechanism 26, a swing arm 27, and a release wire 28. Also, the swing arm 2
A potentiometer-type chaff sheave opening sensor S2 for detecting the chaff sheave opening from the rotation angle of 7 is provided. Reference numeral 29 is a spring for urging the chaff sheave 24 to return to the closing side. The sheave motor M1 is switched between normal rotation and reverse rotation by changing the polarity of the applied voltage.

The toumi 18 is for blowing off the straw debris on the swing selection plate 19, and its wind force is, as shown in FIG. 4, the opening of the fan case cover 18a (hereinafter referred to as the toumi exhaust air opening). Is done by changing. That is, as the opening degree of the exhaust air for Tumi increases, the amount of air escaping from the opening increases, and the wind force (hereinafter referred to as the Tumi wind force) exerted on the processed material on the swing selection plate 19 decreases.

As shown in FIG. 6, the toumi motor M2 is used to adjust the opening degree of the toumi exhaust air. When the toumi motor M2 is normally or reversely rotated by changing the polarity of the applied voltage similarly to the sheave motor M1, the fan case cover 18a is opened and closed via the linkage mechanism 30, the swing arm 31, and the rods 32 and 33. In the figure, S3 is a swing arm 31.
Is a potentiometer-type exhaust opening degree sensor for detecting the rotation angle of the exhaust opening degree.

As shown in FIG. 1, the control means H provided with a microcomputer performs a change adjustment of the chaff sheave opening degree and the toumi exhaust air opening degree (toumi wind force), that is, a change processing ability of the selection processing capacity.
Is controlled by controlling the driving of the. The control means H includes the threshing switch SW1, the stock sensor S1, the chaff sheave opening sensor S2, and the toumi exhaust air opening sensor S described above.
The detection information of 3 has been input.

Further, a layer thickness sensor S4 as a layer thickness detecting means for detecting the layer thickness of the processed material on the swing selection plate 19 is provided at the rear end portion of the frame of the receiving net 22, and the detection information thereof is provided. Is also input to the control means H. The control means H is based on these detection information, and while the threshing device 2 is operating, the rocking | swiveling sorting board 1
Change and adjust the sorting capacity so that the layer thickness of the processed material on 9 is maintained in an appropriate range. That is, the layer thickness sensor S4
Feedback control of the chaff sheave opening and the toumi exhaust air opening based on the detection information of. The layer thickness of the processed material on the rocking sorting plate 19 is maintained within an appropriate range in order to maintain appropriate sorting accuracy.

As shown in FIG. 7, the layer thickness sensor S4 resists the sensor bar T hung swingably around the horizontal axis and the rotation angle of the sensor bar T to the rear side (the transfer direction of the processed object). It consists of a potentiometer PM that converts into a value. In the sensor bar T, the downstream portion T1 in the processed material transfer direction is an upstream portion T2.
It is formed in a longer forked shape. When the layer of the processed material is thin, the downstream portion T1 is in contact with the processed material, and when the layer is thick, the upstream portion T2 is in contact with the processed material.

With the above structure, the thicker the layer of the processed material, the larger the rotation angle of the sensor bar T, and the higher the resistance value of the potentiometer PM. After all, from the layer thickness sensor S4, a DC voltage according to the layer thickness of the processed material is obtained as detection information. The control means H converts this DC voltage into an 8-bit digital value (0 to 255) and then divides it into 6 levels of 0 to 5 (hereinafter referred to as a sheave level). Then, based on this sheave level, the chaff sheave opening degree and the toumi exhaust air opening degree are feedback-controlled.

Swing selection plate 19 when the sheave level is 2
It is said that the layer thickness of the above treated product is within an appropriate range. Therefore, when the sheave level becomes 3 or more, the chaff sheave opening is increased and the toumi exhaust air opening is decreased. Therefore, the sorting capacity is increased. Conversely, if the sheave level becomes 1 or less, the chaff sheave opening is lowered and the toumi exhaust air opening is increased.

The sheave level is used as information for adjusting and controlling the selection processing capacity, and is also displayed on the monitor 34 provided in the control unit 3 and is also used as an alarm. That is, as shown in FIG.
The level is displayed by "a" and the numerical value is displayed by the 7-segment display 34b.

The monitor 34 also includes a character display 34c and a buzzer 34d. Then, when the sheave level becomes 5, the control means H displays "Sheave Chuui!" On the character display 34c. If this state continues for 10 seconds or longer, the message "Seeb Keiho!" Is displayed and the buzzer 35d
Issues an alarm at. Based on these warnings, the worker takes necessary measures such as lowering the traveling speed to prevent the processed material layer from becoming too thick and causing a clogging condition.

However, the chaff sheave 2 of the swing selection plate 19
There is a case where the sheave level does not reach 5 while 4 is in a clogged state and the grain cannot be leaked from the lower part of the chaff sheave 24. In other words, the chaff sheave 24 is finely clogged and becomes like a single plate, and the processed product including the grains falls from the rear end portion of the chaf sheave 24 together with straw waste and is recovered as a second product or a third product. It is discharged as a thing outside the plane.

In order to determine such a state and issue the above-mentioned "Seeb Keiho!" Indication and the alarm by the buzzer 35d, the control means H as a determination means performs control as shown in FIG. In other words, if the layer thickness of the processed material does not decrease by the set value or more after a predetermined time has passed after the cereal culm is no longer supplied to the threshing device 2, it is determined to be abnormal and the above-mentioned alarm is output. Hereinafter, description will be added with reference to FIG.

When the stock sensor S1 is turned on, that is, when the grain culm supply to the threshing device 2 is detected, as described above, the chaff sheave opening degree and the toumi exhaust air opening degree are determined based on the sheave level and the like. Automatic adjustment is done. At this time, the sheave level is stored. That is, the stored value is updated every time (after the processing (a)).

When the grain culm is no longer supplied to the threshing device 2, that is, when the stock origin sensor S1 is turned off, the time for the predetermined time starts from this time, and the current value of the sheave level is compared with the stored value ( After processing (b)). If the difference between the stored value and the current value becomes equal to or larger than the set value (for example, 2) within a predetermined time (for example, 1 minute), the flag FLAG is set and the process branches from the next time to the process (C) so that an alarm or the like is output. There is no such thing. If the difference between the stored value and the current value does not exceed the set value even after the lapse of a predetermined time, an alarm or the like is output. still,
When the threshing clutch 10 is disengaged and the threshing switch SW1 is turned off, the alarm and the like are released.

Other examples will be listed below. The above-mentioned alarm may be released not only when the threshing clutch 10 is disengaged, but also when the difference between the stored value of the sheave level and the current value becomes equal to or more than a set value.

The sheave level difference (set value) and the predetermined time as conditions for outputting an alarm or the like in the above embodiment can be changed by a program of the microcomputer, but these parameters can be changed and set by a dip switch or the like. You can

In the above-described embodiment, the conditions for outputting an alarm or the like are determined by using the sheave level obtained by dividing the detection value of the layer thickness sensor S4 into 6 stages, but the level or 8-bit digital value obtained by dividing the detection value into slightly finer stages is used. May be used as is.

The swing selection plate of the above embodiment is provided with a chaff sheave, and the opening degree of the chaff sheave corresponds to the leakage opening degree of the processed material, but the present invention is not limited to this and, for example, a shield called a slide Glen pan. It can also be applied to an oscillating sorting plate of the type that adjusts the filtration area through which the processed product leaks by moving the plate back and forth.

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

[Brief description of drawings]

FIG. 1 is a block diagram of a combine threshing device control unit according to an embodiment of the present invention.

[Fig. 2] Similarly, a side view of the combine

FIG. 3 is a diagram showing a power transmission system of the combine as well.

FIG. 4 is a perspective view showing the combine threshing device.

FIG. 5 is a schematic view of a chaff sheave opening adjustment mechanism.

FIG. 6 is a schematic view of a mechanism for adjusting the opening degree of exhaust air from Toumi.

FIG. 7 is a side view of the culm thickness detecting means.

FIG. 8 is a flow chart of threshing selection control including abnormality detection.

[Explanation of symbols]

 2 Threshing device 19 Swing selection plate H Discriminating means S1 Grain culm supply detecting means S4 Layer thickness detecting means

Claims (1)

Claims: 1. A grain culm supply detecting means (S1) for detecting whether or not grain culm is being supplied to a threshing device (2), and a processed product on a swing selection plate (19). An abnormality detecting device for a threshing device provided with a layer thickness detecting means (S4) for detecting the thickness of the layer, the threshing device (2) based on the detection information of the both detecting means (S1, S4). An abnormality detecting device for a threshing device, which is provided with a determining means (H) for determining an abnormality if the layer thickness of the processed material does not decrease by a set value or more within a predetermined time after the supply of cereal culms to ..