JPH0453411A - Layer thickness detection device for processed material in the sorting section of threshing equipment - Google Patents

Abstract

PURPOSE:To prevent occurrence of error caused by dropping of a material to be treated into a free end part, by calculating thickness of a layer of the material to be treated based on a vertical position of a contact element before the contact element at the upper part of a selecting part is dropped in the material to be treated. CONSTITUTION:When a contact element 22 is vertically moved at the upper part of a selecting part by an actuator M2 and a free end part SW2 of the contact element reaches the top of a material to be treated, a detecting signal is sent, thickness of the layer to be treated is calculated by a counting means from the vertical position of the contact element at the point of a time of the signal sending by a position detecting means PM2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the thickness of a layer of processed material present in a sorting section of a threshing device.

[Conventional technology]

Such a device for detecting the layer thickness of the processed material includes a contact element that is located above the sorting part and is swingable around an upper fulcrum in the direction of transport of the processed material, and a free end of the contact element that is located on the sorting part. a biasing means that urges downward so as to constantly contact the upper surface of the layer to be treated, an angle detection means for detecting the swing angle of the contact, and a thickness of the layer to be treated based on information from the angle detection means. It has been proposed that the system is equipped with a calculation means for calculating .

[Invention or problem to be solved]

However, as mentioned above, if the contactor is in constant contact with the object to be treated, the free end may gradually sink into the object, making it impossible to accurately detect the thickness of the layer.

The present invention has been made in view of this situation, and its purpose is to prevent the contact from sinking into the processed material,
The purpose of this invention is to enable more accurate detection of the thickness of the layer to be processed.

[Means to solve the problem]

The layer thickness detection device for the processed material in the sorting section of a threshing device according to the present invention includes a contact element that is moved up and down by an actuator above the sorting section, and a contact element that detects contact of the contact element with the upper surface of the processed material. A contact detection means for detecting, a position detection means for detecting the vertical position of the contact, and a thickness of the layer of the processed material based on information of the position detection means at the time when the contact detection means detects contact. The characteristic configuration is that it is equipped with a calculation means for calculating .

[For production]

An actuator or contactor is moved up and down above the sorting section. When the contact comes into contact with the upper surface of the object layer, the contact detection means detects the contact of the contact with the upper surface of the object layer. The position detection means detects the vertical position of the contact, and the thickness of the layer of the object to be processed is calculated based on the calculation means or information from the position detection means at the time when the contact detection means detects contact. become.

If the thickness of the layer to be treated is to be detected continuously, the contact that has been moved downward is moved upward and the above-described operation is repeated.

〔Effect of the invention〕

Since the thickness of the layer of the object to be treated is calculated based on the vertical position of the contact before it sinks into the object, more accurate detection results can be obtained than in the past.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a threshing device mounted on a combine harvester will be described based on the drawings.

As shown in Fig. 6, in the threshing device, a handling cylinder (2) that handles and processes the cut husk culms that are conveyed by the feed chain (1) is housed in a handling chamber (A). The sorting section (B) located below A) has a swinging sorting device (3) that sorts out the leaked material from the handling room (A), and a winnowing machine (that blows sorting air). 4) etc. are provided.

In the lower part of the handling chamber (A), a receiving net (5) for leaking threshed material is provided along the lower outer periphery of the handling barrel (2),
A dust inlet (6) for discharging the threshed material remaining in the handling chamber (A) is formed at the rear side of the receiving net (5).

The oscillating sorting device (3) includes a grain pan (7), a chaff sieve (8), and a stroke rack (9) arranged sequentially from the front to the rear,
Below the chaff sieve (8), an auxiliary grain pan (
10) and the grain sheave (11) are arranged sequentially in the front-rear direction, and each part is fixed between a pair of left and right side plates (12) so that they swing together. .

At the bottom of the sorting device (B), the grain sieve (1
1), which collects the grains leaking from the first grain as the first grain, and the straw which falls beyond the end of the straw rack (9) and the end of the grain sieve (11). A second material collecting section (14) is provided for collecting the processed material (abbreviated as "second material" in the following explanation) mixed with waste, etc. and grains and returning it to the handling chamber (A). ing. still,
In the figure, (15) indicates that the second item is reprocessed and the handling room (A
) is the second thrower.

To explain the chaff sieve (8), as shown in FIG. 4, a plurality of band plate-like members (8a) arranged in parallel in the processing material transfer direction (left-right direction in FIG. 4) are arranged at the upper end thereof. The operating rod (16), which is rotatably attached to the left and right side plates (8b) using the fulcrum as a fulcrum, and which is pivotally attached to the lower end of each strip member (8a), is pushed and pulled in the front-back direction. Accordingly, the spacing (p) between adjacent strip members (8a) (which may be abbreviated as chaff opening degree in the following description) can be changed and adjusted.

A first electric motor (Ml) for interval adjustment for changing and adjusting the chaff opening degree is provided, and a swinging motor (Ml) is connected to the first electric motor (Ml) via a gear-type linkage mechanism (17). The arm (17a) and the operating rod (16) are interlocked and connected by a release wire (18). still,
In the figure, (19) is a spring that biases the chaff opening degree back to the closing side, and (PMI) is a chaff that detects the operation amount of the operating rod (16) by the first electric motor (Ml) as the chaff opening degree. This is a first potentiometer for detecting the opening degree, and is attached to the pivot portion of the swing arm (17a).

A first drive circuit (20) for the first electric motor (Ml)
and the first potentiometer (PMI) are connected to the control device (H). The control device (H) is a chaff sieve (8
) Determine the chaff opening as much as possible so that the layer of the processing material existing on the layer has the set thickness, and
The first electric motor (Ml) is driven so that the chaff opening degree detected from the target chaff opening degree matches the target chaff opening degree, thereby controlling the chaff opening degree to the target interval.

Basically, when the layer of the material to be treated on the chaff sieve (8) becomes thicker than the set value, the first
The electric motor (Ml) is driven to increase the leakage amount of the processed material. Furthermore, when the layer of the material to be treated becomes thinner than a set value, the first electric motor (Ml) is driven so that the chaff opening degree becomes smaller, thereby reducing the amount of leakage of the material to be treated. In this way, the layer of the material to be processed is maintained at a constant thickness, allowing for highly efficient sorting.

To explain the configuration for detecting the thickness of the processed material layer, as shown in FIG. (22) (corresponding to a contactor), a small second electric motor (M2) that swings this arm (22) together with the shaft (22a) along the direction of transferring the processed material (direction of the handling cylinder axis) (corresponds to an actuator) and an arm (corresponding to an actuator).
22) for detecting the swing angle of the second potentiometer (PM
2) (corresponding to position detection means) and arm (22)
Upper limit switch (SWI) that turns on when the upper limit position is reached
, and a lower limit switch (corresponding to SW2X contact detection means) that turns on when the free end of the arm (22) comes into contact with the upper surface of the layer to be treated.

To give a supplementary explanation, the second electric motor (M2) and the second
The potentiometer (PM2) is housed in a box (24) fixed to the side plate (12), and is interlocked and connected via a gear (23). Second potentiometer (PM
2) is connected to the control device (H) (corresponding to the calculation means) shown in FIG. 1, and outputs a higher signal voltage as the arm (22) swings upward. Further, the lower limit switch (SW2) is provided at the free end of the arm (22). In addition, the upper limit switch (SWI) and lower limit switch (SWI)
W2) are always open types that are turned ON only while the detection part is pressed by contact.

2nd potentiometer (PM2), 2nd electric motor (
Second drive circuit (21) for Ml), upper limit switch (SW
I), the lower limit switch (SW2) is the control device (H)
has been contacted. The control device (H) drives the second electric motor (M2) to swing the arm (22) up and down,
When the free end of the arm (22) comes into contact with the upper surface of the layer of material to be treated on the chaff sieve (8), the lower limit switch (SW2) is activated.
When the switch is turned on, the output signal from the second potentiometer (PM2) is taken in and the thickness of the layer of the object to be processed is calculated.

Furthermore, the alarm device (24) is connected to the control device (H).
are the upper limit switch (SWI) and lower limit switch (SW2)
Activates when the signal is not ONL for a certain period of time or more.

Next, the operation of the control device (I) will be briefly explained based on the flowchart of FIG.

First, initial setting processing is executed and the threshing switch (SW3), which is turned ON when the threshing device is operating, is checked (steps 1 and 2). And threshing switch (SW3
) is ON, the upper limit switch (SWI) is OFF, and the lower limit switch (SW2) is ON, the layer thickness is calculated from the detected value of the second potentiometer (PM2), and the arm (
22), the second electric motor (M2) is driven to swing upward, and the chaff opening degree, which will be described later, is adjusted based on the calculation result, and the process returns to step 2 (steps 3 to 7).

However, if the upper limit switch (SWI) is ON in step 3, the second electric motor (
M2) is driven (step 8), and the chaff opening degree is adjusted based on the previous calculation result. Further, if the lower limit switch (SW2) is OFF in step 4, the chaff opening degree is adjusted based on the previous calculation result.

In step 2, the threshing switch (SW3) is OFF,
When the upper limit switch (SWI') is OFF, the second electric motor (M2) is driven to swing the arm (22) up and away, or when the upper limit switch (SWI) is OFF.
If N, it is assumed that the evacuation has been completed and the arm (22) is stopped.

What is shown in FIG. 3 is a subroutine for adjusting the chaff opening. When the calculated thickness of the processed material layer is larger than the appropriate range, the first electric motor (Ml) is driven to increase the chaff opening degree. If the thickness of the layer to be treated is neither larger nor smaller than the proper range, that is, if it is within the proper range, the chaff opening degree is maintained. If the thickness of the layer to be treated is smaller than the appropriate range, the first electric motor (Ml) is driven to reduce the chaff opening.

[Another example]

In the previous embodiment, the lower limit switch (SW2) which is a contact
Although the structure is such that the arm (22) provided with the arm (22) is vertically moved and reciprocated by swinging, it may be configured to be reciprocated linearly along the vertical direction.

It should be noted that the present invention is not limited to the structure of the attached drawings by adding or writing numerals in the claims for convenient comparison with the drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the layer thickness detection device for processed material in the sorting section of a threshing device according to the present invention, FIG. 1 is a block diagram showing the control configuration, FIG. 2 is a flowchart showing the control operation, and FIG. 3 4 is a side view showing the chaff opening adjustment structure, FIG. 5 is a perspective view of a sensor, and FIG. 6 is a schematic cutaway side view of the threshing device. (B)...Selecting section, (H)...Calculating means, (M2)...Actuator, (PM2
)...Position detection means, (SW2)...
Contact detection means, (22)...contact element.

Claims (1)

[Claims] Above the sorting section (B), actuator (M2)
The contact (22) is moved up and down by the contact (22), and the contact (22) is moved up and down by
22) contact detection means (
SW2), position detection means (PM2) for detecting the vertical position of the contactor (22), and contact detection means (SW2).
) at the time when the position detecting means (PM2
) A calculation means (H) for calculating the thickness of the layer of the processed material based on the information in the above.