JPH0453412A - Device for detecting layer thickness of material to be treated in selecting device - Google Patents

Abstract

PURPOSE:To accurately obtain thickness of a layer of a material to be treated, by connecting a damper to reduce a traveling speed to the dropping side to a contact element to shake corresponding to the layer of a material to be treated. CONSTITUTION:A stationary part 5 of a shaking selecting device 3 is rockingly provided with a contact element 17 and thickness of a layer of a material to be treated is obtained from the vertical position of the contact element in a state in contact with the top of the layer of a material to be treated. An air damper is connected to the contact element 17 to reduce shaking speed only downward and variability of the vertical position is lessened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an upper fixed part of a swinging sorting device that swings with a vertical motion component, so that it can be moved vertically and returned to the downward direction. Thickness of a layer of processed material in a sorting device that is provided as a sorting device and is equipped with a contact that contacts the upper surface of a layer of processed material that is present on the oscillating sorting device, and a detection means that detects the vertical position of the contact. This invention relates to a detection device.

[Conventional technology]

In the processing material layer thickness detection device in such a sorting device, the contactor is in contact with the upper surface of the processing material layer and is pushed up by the upper surface of the processing material layer when the swinging sorting device swings upward; When the swinging sorting device swings upward, it is lowered by the return biasing force. That is, the contactor moves up and down in conjunction with the swinging motion of the swinging sorting device without coming into contact with the upper surface of the layer to be processed.

[Invention or problem to be solved]

When the contact moves up and down in this way, the vertical position detected by the detection means also changes, and if you want to find the correct thickness of the layer to be processed, it is necessary to perform appropriate processing on the detected information. must be carried out. For example, processing must be performed to capture only the vertical position when the contact changes from a raised state to a lowered state. However, special equipment is required to perform such processing, which not only complicates the overall configuration but also causes high costs.

An object of the present invention is to make it possible to accurately determine the thickness of a layer of a processed material without using any special equipment as described above.

[Means to solve the problem]

The processing object layer thickness detecting device in the sorting device according to the present invention is characterized in that the contactor is connected to speed limiting means for slowing down the movement speed on the downward side.

[For production]

The contactor is in contact with the top surface of the material layer, and when the oscillating sorting device swings upward, it is pushed by the top surface of the material layer and rises; however, when the oscillating sorting device oscillates upward, there is a speed limit. Since the movement speed cannot be slowed down by any means, it descends.

The moving speed at this time is slower than the speed when the swinging sorting device swings upward, and the contacts are left behind.
Next, when the swinging sorting device swings upward, it is pushed again onto the upper surface of the layer of material to be treated and rises. Therefore, the lower the moving speed of the contact, the smaller the amount of elevation, and if it is sufficiently slow compared to the upward swinging speed of the swing sorting device, and the thickness of the layer of the material to be processed does not change much, The contact remains elevated and hardly descends, the amount of elevation becomes extremely small, and the vertical position detected by the detection means becomes stable.

〔Effect of the invention〕

Since the fluctuation in the vertical position detected by the detection means is reduced, it becomes possible to easily process the detected information without using a special device as in the past. As a result, the overall configuration is simplified and costs can be reduced.

〔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, the threshing device includes a handling chamber (A) that houses a handling cylinder (2) that handles and processes the harvested husks,
It consists of a sorting section (B) equipped with a swinging sorting device (3) that sorts out the waste leaked from A) and a winnow (4) that blows sorting air.

The handling cylinder (2) is configured to handle and process the reaped husks in a sideways posture, which are held and conveyed by the feed chain (1), by rotating around an axis (P) along the conveyance direction. .

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),
Then, at the rear side of the receiving net (5), the handling room (A
) An opening (6) for discharging the threshed material remaining in the
is formed.

The swing sorting device (3) includes a grain pan (7), a chaff sieve (8), and two stroke racks (9A) arranged in order from the front to the rear.
9B), and below the chaff sieve (8), an auxiliary grain pan (10) and a grain sieve (11
) are arranged sequentially in the front-rear direction, and each part thereof is fixed between a pair of side plates (12) so as to swing integrally including a vertical motion component.

Further, in the lower part of the sorting device (B), there is a first grain collecting section (13) for collecting grains leaking from the grain sieve (11) as the first grain, and a terminal end of the straw rack (9). The treated material (referred to as second material in the following explanation) containing grains and straw waste that has fallen beyond the end of the grain sieve (11) is collected and placed in the handling room (A). A second product recovery section (14) for return is provided. In the figure, (15) is a thrower for returning the second item to the handling chamber (A).

As shown in FIGS. 1 to 3, a swing sorting plate (
3) A first sensor (Sl) that detects clogging of the processed material that is transferred without correcting the uneven thickness of the upper processed material layer.
A second sensor (S2) for detecting the thickness of the material layer is provided on the upper side in the rotational direction of the handling cylinder (on the right side in the figure).

The first sensor (Sl) includes a downward contact (16) that is provided to be able to swing rearward and upward, and a switch (SW) that is turned on when the contact (16) swings backward by more than a set angle.
) Consists of thorns. This contactor (16) is biased downward with a strong force to return, so that it stops receiving the transferred processing material and gradually brings it toward the second sensor (S2).
Its front part has a wide, sloping surface. The switch (SW) is connected to the control device (H) as shown in Fig. 4, and when the contact (16) swings backward by more than a set angle, the switch (SW) turns on the control device (H). A signal is output.

The second sensor (S2) includes a downward contactor (17) provided to be able to swing rearward and upward, and a potentiometer (PM) whose resistance value changes according to the swinging of the contactor (17).
) (corresponding to the detection means). Contact (17
) is biased downward to return with a weak force, and its front portion is formed into a narrow surface so as not to provide resistance to the processed material being transferred. An air damper (corresponding to 100 speed limiting means) for slowing down only the downward swinging speed is connected to the base end. The potentiometer (PM) is connected to the control device (H), and the voltage corresponding to the backward swing of the contact (16) is applied to the control device (H).
) is output.

With this configuration, the contactor (17) can be attached to the swinging sorting device (
3) When oscillating upward, either the oscillating sorting device (3)
) When swinging upward, the swinging speed cannot be kept low by the air damper (18), so that the processing object layer moves away from the upper surface of the object layer and swings upward slowly. The speed at which the oscillating sorting device (3) oscillates upward is slower than the speed at which the oscillating sorting device (3) oscillates upward. When moving, it is again lifted onto the upper surface of the layer of the material to be treated and is swung upward. And as a result,
The swing of the contact (17) becomes extremely small and becomes stable near the position of high swing.

The control device (H) is connected not only to the switch (SW) and potentiometer (PM) but also to a drive circuit (19) and a vehicle speed sensor (20). and the drive circuit (
19) is connected to an electric motor (M) that operates a vehicle speed change device (not shown) of the combine harvester. Control device(
H) is a switch (SW), potentiometer (PM)
, the drive circuit (19) based on information from the vehicle speed sensor (20).
) to control the driving direction of the electric motor (M) so that the thickness of the layer of the material to be treated is maintained at the set value.

Basically, as shown in the flowchart in Figure 5, the ON/OFF status of the switch (SW) is checked, and if it is ON, it is determined that a blockage has occurred on the chaff sheave (8), and the drive circuit (SW) is checked. 19) outputs a deceleration signal. This reduces the amount of culm that is cut and fed to the handling room (A).

Also, if the switch (SW) is OFF, the contact (17
) is smaller than the first setting angle, and if it is smaller, it is determined that the thickness of the processed material layer is thinner than the allowable thickness, and a speed increase signal is output to the drive circuit (19). do. This increases the amount of grain culm that is cut and supplied to the handling room (A).

In addition, if the swing angle of the contact (17) is smaller than the first set angle, it is checked whether it is larger than the second set angle (larger than the first set angle), and if it is larger, the thickness of the processing material layer is determined. It is determined that the thickness is thicker than the allowable thickness, and a deceleration signal is output to the drive circuit (19).

If the swing angle of the contactor (17) is not larger than the first set angle, check whether the switch (SW) is ON or OFF again.

By repeating this process, the layer of the treated material on the chaff sieve (8) is maintained at a constant thickness.

[Another example]

A weight may be attached to the tip of the contactor (17) so that the contactor (17) is biased downward to return.

In the previous embodiment, the contactor (17) is configured to swing, but may be configured to move up and down 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 the drawing]

The drawings show an embodiment of the processing material amount detection device for a threshing device according to the present invention, in which FIG. 1 is a side view of the main parts, FIG. 2 is a longitudinal sectional front view of the upper part of the threshing device, and FIG. 3 is a bottom view of the upper part of the threshing device. Figure, 4th
FIG. 5 is a block diagram showing the control configuration, FIG. 5 is a flowchart of control operation, and FIG. 6 is an overall vertical sectional side view of the threshing device. (PM)...detection means, (3)...swing sorting device, (5)...fixed part, (17)...
...Contactor, (18)...Speed limiting means.

Claims (1)

[Claims] Oscillating sorting device that oscillates with vertical motion components (3)
A contact (17) is provided on the upper fixed part (5) so as to be movable up and down and biased to return to the descending side, and comes into contact with the upper surface of the processing material layer present on the swing sorting device (3). and a detecting means (PM) for detecting the vertical position of the contact (17), in a sorting device, the processing object layer thickness detecting device is provided with: A processing material layer thickness detecting device in a sorting device to which a speed limiting means (18) for slowing down the moving speed is connected.