JPH084422B2 - Device for detecting layer thickness of processed material in sorting section of threshing device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for detecting the layer thickness of a processed material existing in a sorting section of a threshing apparatus.

[Prior Art] As a layer thickness detecting apparatus for such a processed material, a contactor that is swingable around the upper fulcrum along the processed material transfer direction and a free end portion of the contactor is provided above the sorting section. Based on the information of the urging means for urging downward so as to always contact the upper surface of the processed material layer existing on the sorting part, the angle detecting means for detecting the swing angle of the sorting part, and the information of the angle detecting means. There has been proposed one provided with a calculation means for calculating the thickness of the physical layer.

[Problems to be Solved by the Invention]

However, as described above, the contact always contacts the workpiece, so that the free end portion may gradually sink into the workpiece, and the layer thickness may not be accurately detected.

The present invention has been made by paying attention to such an actual situation, and an object thereof is to prevent the contactor from sinking into a processing object and to detect the thickness of the processing object layer more accurately. It is in.

[Means for solving the problem]

In the apparatus for detecting the layer thickness of the processed product in the selection unit of the threshing device according to the present invention, the contactor that is moved up and down by the actuator above the selection unit and the contact of the contactor with the upper surface of the processed product Based on the information of the contact detecting means for detecting, the position detecting means for detecting the vertical position of the contactor, and the position detecting means at the time when the contact detecting means detects the contact, the thickness of the layer of the processed material. Is characterized in that a calculation means for calculating

[Work]

An actuator moves the contactor up and down above the sorting unit. Then, when the contactor comes into contact with the upper surface of the processed material layer, the contact detection means detects contact of the contactor with the processed material upper surface. The position detecting means detects the vertical position of the contact, and the calculating means calculates the layer thickness of the processed object based on the information of the position detecting means at the time when the contact detecting means detects the contact. become.

In order to continuously detect the thickness of the processed material layer, the contact moved to the lower side is moved to the upper side, and the above operation is repeated.

〔The invention's effect〕

Based on the vertical position before the contact sinks into the processed object,
Since the layer thickness of the object to be processed is calculated, it is possible to obtain a more accurate detection result than before.

〔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. 6, in the threshing device, a handling cylinder (2) for handling and processing the harvested culm sandwiched and conveyed by the feed chain (1) is housed in the handling room (A). In the sorting section (B) arranged below A), an oscillating sorting apparatus (3) for sorting the leaked material from the handling chamber (A).
And a Kara-no-mura (4) that sends a selection wind.

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), and the rear side of the receiving net (5). A dust delivery port (6) for discharging the threshed material remaining in the handling chamber (A) is formed at the location.

The rocking / sorting device (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, respectively, and the chaff sheave (8). Auxiliary gren pan (10) and glen sheave (11) are arranged below each other in a state of being lined up in order in the front-rear direction, and their respective parts are integrally fixed by being fixed between a pair of left and right side plates (12). It is configured to swing.

In the lower part of the sorting device (B), the best item recovery section (13) for recovering the grain leaking from the grain sieve (11) as the first object, the end part of the straw rack (9) and the In order to collect and return to the handling chamber (A), a processed product (abbreviated as “second product” in the following description) in which straw debris and grains that have fallen beyond the end of the Glen Sieve (11) are mixed. And a second item recovery section (14). In the figure, (15) is a No. 2 thrower for reprocessing the No. 2 waste and returning it to the handling room (A).

Explaining the chaff sheave (8), as shown in FIG. 4, a plurality of strip-shaped members (8a) juxtaposed in the processed material transfer direction (horizontal direction in FIG. 4) have an upper end portion. Pushing and pulling the operation rod (16) pivotally attached to the left and right side plates (8b) about the fulcrum and pivotally attached to the lower end of each strip plate member (8a) in the front-rear direction. Thus, the interval (p) between adjacent ones of the strip plate members (8a) (which may be abbreviated as chaff opening in the following description) can be changed and adjusted.

Then, a first electric motor (M1) for adjusting the interval for changing and adjusting the chaff opening is provided, and swinging connected to the first electric motor (M1) via a gear-type linkage mechanism (17). The arm (17a) and the operation rod (16) are interlockingly connected by a release wire (18). In addition, (1
9) is a spring for biasing the chaff opening to return to the closing side, and (PM1) is a chaff opening detection for detecting the operation amount of the operation rod (16) by the first electric motor (M1) as the chaff opening. Is a first potentiometer attached to the pivot portion of the swing arm (17a).

The first drive circuit (20) and the first potentiometer (PM1) for the first electric motor (M1) are connected to the control device (H). The control device (H) determines the chaff opening degree so that the layer of the processing object existing on the chaff sheave (8) has a set thickness, and determines the chaff opening degree detected from the first potentiometer (PM1) and the target value. The target electric interval is controlled by driving the first electric motor (M1) so that the chaff opening matches.

Basically, when the layer of the processed material on the chaff sheave (8) becomes thicker than the set value, the first electric motor (M1) is driven toward the larger chaff opening to reduce the leakage amount of the processed material. Increase. When the layer of the processed material becomes thinner than the set value, the first electric motor (M1) is driven so that the chaff opening becomes small, and the leakage amount of the processed material is reduced. In this way, the layers of the processed products are maintained at a constant thickness, and efficient screening can be performed.

A structure for detecting the thickness of the processed material layer will be described. As shown in FIG. 1, the sensor (S) has an arm provided on a shaft (22a) provided between the left and right side plates (12). (22) (corresponding to contact), this arm (22)
Second electric motor (M2) that swings the shaft along with the shaft (22a) along the transfer direction (direction of the handling cylinder axis)
(Corresponding to an actuator), a second potentiometer (PM2) for detecting the swing angle of the arm (22) (corresponding to position detecting means), and an upper limit switch (ON) when the arm (22) reaches the upper limit position ( SW1), lower limit switch (SW) that turns ON when the free end of the arm (22) contacts the top surface of the processed material layer.
2) (corresponding to contact detection means).

As a supplementary explanation, the second electric motor (M2) and the second electric motor (M2)
The potentiometer (PM2) is housed in a box (24) fixed to the side plate (12) and is interlocked and coupled via a gear (23). The second potentiometer (PM2) is connected to the control device (H) (corresponding to a computing means) shown in FIG. 1, and outputs a higher signal voltage as the arm (22) swings upward. Also, lower limit switch (SW2)
Is provided at the free end of the arm (22). Both the upper limit switch (SW1) and the lower limit switch (SW2) are of the normally open type that are turned on only while they are in contact with each other and the detection unit is pressed.

Second potentiometer (PM2), second electric motor (M
The second drive circuit (21) for 1), the upper limit switch (SW1), and the lower limit switch (SW2) are connected to the control device (H). The control device (H) drives the second electric motor (M2) to swing the arm (22) up and down so that the free end of the arm (22) is located on the chaff sheave (8). When the lower limit switch (SW2) comes into contact with the upper surface and the lower limit switch (SW2) is turned on, the output signal from the second potentiometer (PM2) is taken in and the layer thickness of the object to be processed is calculated.

In addition, the alarm device (24) communicated with the control device (H)
Operates when the upper limit switch (SW1) and lower limit switch (SW2) do not turn on for a certain period of time.

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

First, the initial setting process is performed, and the threshing switch (SW3) that 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 (SW1) is OFF and the lower limit switch (SW1)
If 2) is ON, the layer thickness is calculated from the detection value of the second potentiometer (PM2), the second electric motor (M2) is driven to swing the arm (22) upward, and the calculation result The chaff opening is adjusted based on the above, and the process returns to step 2 (steps 3 to 7).

However, if the upper limit switch (SW1) is ON in step 3, the second electric motor (M2) should be swung downward to move the arm (22).
Is driven (step 8), and the chaff opening is adjusted based on the previous calculation result. If the lower limit switch (SW2) is OFF in step 4, the chaff opening is adjusted based on the previous calculation result.

If the threshing switch (SW3) is OFF and the upper limit switch (SW1) is OFF in step 2, the second electric motor (M2) is driven to swing the arm (22) upward and retract. If the upper limit switch (SW1) is ON, the arm (22) is stopped because it is considered that the retreat is completed.

FIG. 3 shows 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 (M1) is driven to increase the chaff opening. When the thickness of the processed material layer is neither larger than or smaller than the proper range, that is, within the proper range, the chaff opening is maintained. When the thickness of the processed material layer is smaller than the appropriate range, the first electric motor (M1) is driven to reduce the chaff opening.

[Another embodiment]

In the previous embodiment, the lower limit switch (SW2), which is a contact
Although the arm (22) provided with is reciprocally moved by swinging up and down, it may be reciprocally moved linearly along the vertical direction.

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]

The drawing shows an embodiment of a layer thickness detecting device for a processed material in a sorting section of a threshing device according to the present invention, FIG. 1 is a block diagram showing a control configuration, FIG. 2 is a flowchart showing a control operation, and FIG. Is a subroutine for adjusting the chaff opening, FIG. 4 is a side view showing a structure for adjusting the chaff opening, FIG. 5 is a perspective view of the sensor, and FIG. 6 is a schematic notched side view of the threshing device. (B) …… Sorting unit, (H) …… Computing means, (M2) …… Actuator, (PM2) …… Position detecting means, (SW2) ……
Contact detection means, (22) ... contactor.

Front page continued (72) Inventor Shigeki Hayashi 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Shin Oda 64 Ishizukita-cho, Sakai City Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72 ) Inventor Sueda 64 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd. (72) Inventor Takao Mizoguchi 64, Ishizukitacho, Sakai City Osaka Prefecture (72) Inventor Toshio Tominaga Osaka 64, Ishizukita-machi, Sakai City, Japan (56) References in Sakai Factory (56) References 63-66449 (JP, U) 59-136927 (JP, U)

Claims (1)

[Claims] 1. A contactor (22) which is moved up and down by an actuator (M2) above a sorting section (B), and contact detection means (contact detection means for detecting contact of the contactor (22) with an upper surface of a processing object. SW2), position detecting means (PM2) for detecting the vertical position of the contact (22), and information based on the position detecting means (PM2) at the time when the contact detecting means (SW2) detects contact. And a calculation means (H) for calculating the thickness of the layer of the processed product, the device for detecting the layer thickness of the processed product in the sorting unit of the threshing device.