JPH10201351A - Grain separater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the shape of the sensor impeller of a wind velocity sensor to easily catch a separating wind by arranging the sensor at a duct formed in a dust exhausting/separating room. SOLUTION: This grain separator 10 is provided with an oscillating separation means 18 for oscillating and separating grain, etc., in the dust exhausting/ separating room 16 and grain, etc., dropping from a handling barrel 12 onto the oscillating and flowing plate 24 of the means 18 is oscillation-separated by the forward/backward oscillating of the plate 24, etc., and separated by separating wind flowing through a duct formed in the room 16. A wind velocity sensor 36 is arranged in the duct and the sensor 36 is provided with the sensor impeller turning by receiving the wind pressure of the separating wind and a potentiometer 40 detecting the rotation angle of this sensor impeller. Then concerning the width of the wind receiving face of this sensor impeller, a free tip side is formed larger a fixing base part side to easily catch the separating wind.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain sorting apparatus provided in a combine or the like, and more particularly, to a swing sorting means for swinging and sorting grains, and a wind for sorting grains and straw chips by wind pressure. The present invention relates to a grain sorting device provided with sorting means.

[0002]

2. Description of the Related Art A combine or the like is provided with a grain sorting device 10 shown in FIG. 8, and the grain sorting device 10 is arranged from below a handling cylinder 12 to a downstream side of a grain flow. Oscillating flow plate 24, a chaff sheave 26 having a number of fins 26a, and a straw rack 28 provided behind the chaff sheave 26.
The chaff sheave 26 and the straw rack 28 are reciprocally swingable integrally in the front-rear direction.

[0003] Below the oscillating flow plate 24, there is provided a Karamin fan 20 for sending a sorting wind into the dust sorting chamber 16.
Further, a suction fan 22 for discharging the dust in the dust sorting chamber 16 to the outside of the apparatus is provided behind the straw rack 28, and the grains and straw debris moving on the chaff sheave 26 and the straw rack 28 are subjected to wind pressure. Will be screened by. The first spiral shaft 32, the turbo fan 23, and the second spiral shaft 34 are disposed below the oscillating flow plate 24.

[0004] The grain culm sent from the pre-processing unit of the combine is sent to a handling room and threshed by the handling drum 12, and the threshed grains and straw wastes are received by a receiving net (not shown). Although it is separated and leaked, a part of the straw waste is caught by the receiving net, and the other falls through the receiving net and falls onto the oscillating flow plate 24.

[0005] The straw debris caught on the receiving net moves on the chaff sheave 26 and the straw rack 28 by the sorting wind and is discharged from the exhaust port. On the other hand, the grains and straw debris dropped from the receiving net are oscillated. Sorting is performed on the plate 24 by a sorting wind and a swinging operation. The grains fall down from the fins 26 a of the chaff sheave 26 and are transported by the first spiral shaft 32 and the second spiral shaft 34.

Conventionally, grains and the like that have fallen downward from the receiving net are moved below the handling cylinder 12 and on the oscillating flow plate 24.
The thickness of the layer is detected by a contact type float sensor 36 'provided above, and the opening of the fin 26a of the chaff sheave 26 is adjusted according to the thickness of the layer.

[0007]

However, the conventional float sensor 36 'is disposed at one end of the oscillating flow plate 24 in a direction substantially orthogonal to the oscillating direction of the oscillating flow plate 24 and senses the amount of material such as grains. The mainstream of the grain flow
2. It was difficult to perform sensing at the lower central portion, and it was not possible to detect accurate grains and the like. For this reason, it was difficult to perform appropriate sorting control. In addition, it is also possible to arrange a sensor in the center part below the handling cylinder 12, but in this case, it is necessary to change the structure of the threshing device.

Further, in the conventional float sensor 36 ', the detector is brought into contact with the oscillating grain or the like, which may cause the detector to jump and cause erroneous detection. Since the float sensor 36 'is suspended from above on the dynamic flow plate 24, there is also a problem that straw chips mixed in the grains are caught by the detector, thereby causing erroneous detection.

The present invention has been made to solve such a problem, and an object thereof is to dispose a wind speed sensor in an air passage formed in a dust sorting chamber of a threshing apparatus,
It is an object of the present invention to provide a grain sorting device in which the wind receiving blades are shaped to easily catch the sorting wind.

[0010]

In order to achieve this object, the present invention forms an air flow path for a sorting wind flowing from an upstream side to a downstream side in a dust sorting chamber (16) of a threshing apparatus, In a grain sorting device (10) for sorting grains and objects to be sorted such as straw waste by the sorting wind, a wind receiving member (42) receiving the wind pressure of the sorting wind in the air path; A rotary actuator (4) for detecting the displacement of the member (42);
0), and the width of the wind receiving surface (42a) of the wind receiving member (42) is adjusted from the side of the mounting base to the rotating shaft (40a) of the rotary actuator (40). Also, the free end side is formed wide.

The present invention also relates to the wind speed sensor (36).
Thereby, the amount of the material to be sorted on the swing sorting means (18), which is swing-sorted in the dust sorting chamber (16), is detected.

Further, the present invention provides the wind receiving member (42).
The wind receiving surface (42a) on the free end side is formed as a curved surface that curves in the traveling direction of the sorting wind.

Further, a tongue piece (42) bent along the traveling direction of the sorting wind is provided on one side of the wind receiving member (42).
b), and the tongue piece (42b) is attached to the rotation shaft (40).
a) a mounting hole (43) is formed in the device;

(Action) According to the above-mentioned specific features of the invention, the grain sorting apparatus (10) of the present invention swings the grains and straw chips threshed by the threshing apparatus in the dust sorting chamber (16). There is a swing sorting means (18) for sorting, and the grains and the like dropped on the swing sorting means (18) are separated by the swing sorting means (1).
8) Swinging is performed by swinging back and forth, and is also sorted by the sorting wind flowing through the air passage formed in the dust sorting chamber (16).

A wind speed sensor (36) is disposed in the wind path. The wind speed sensor (36) includes a wind receiving member (42) that rotates by receiving the wind pressure of the selected wind, and a wind receiving member (42). A rotation actuator (40) for detecting a displacement amount of the member (42), the width of the wind receiving surface (42a) of the wind receiving member (42) being adjusted by the rotation actuator (4).
By making the free end side wider than the base part attached to the rotating shaft (40a) of (0), it is easy to catch the sorting wind.

Note that the reference numerals in parentheses described above are for reference to the drawings, and do not limit the configuration of the present invention at all.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. Note that members that are the same as or correspond to those of the above-described conventional example are denoted by the same reference numerals and described.

FIG. 1 is a schematic cross-sectional side view of a combine equipped with a grain sorting device according to the present invention. In FIG. 1, a grain sorting device 10 covers a lower portion of an outer peripheral surface of a handling drum 12. , A swing sorting means 18 disposed in a dust sorting chamber 16 formed from below the catch net 14 toward the downstream side of the grain flow, and the swing sorting means. A wind selection means (described later) is provided for selecting grains, straw chips, and the like moving on the means 18 by wind pressure.

The oscillating selection means 18 includes an oscillating flow plate 24 and a chaff sheave 26 arranged from the upstream side to the downstream side of the grain flow, and a straw rack 28 provided at a lower rear portion of the chaff sheave 26. The swing flow plate 24, the chaff sheave 26, and the straw rack 28 are reciprocally swingable in the front-rear direction by a swing device (not shown). The chaff sheave 26 separates chaff (rice cake) from kernels, and has a large number of fins 26a.
Are provided substantially parallel to each other, and the degree of opening of the fins 26a is adjusted according to the layer thickness of the grain or the like on the chaff sheave 26.

A first helical shaft 32 is disposed below the chaff sheave 26. The first helical shaft 32 has helical blades, and stores grains that have leaked from the chaff sheave 26 into a Glen tank (not shown). Conveyed to A second helical shaft 34 is disposed substantially in parallel with the first helical shaft 32 with the turbo fan 23 interposed therebetween, behind the first helical shaft 32.

The wind selection means includes a Karamin fan 20 disposed below the oscillating flow plate 24 and rotated by a driving source (not shown), and a suction fan 22 disposed behind the straw rack 28. doing. These fans 2
Nos. 0 and 22 form an air passage of a sorting wind that passes from the Karino fan 20 to the suction fan 22 in order to discharge unnecessary substances lighter than the grains to the outside.

As described above, most of the grains threshed by the handling cylinder 12 fall from the receiving net 14 onto the oscillating flow plate 24.
The grains that could not be leaked from the receiving net 14 and the unhusked grains with ears are moved onto the straw rack 28 together with the straw waste. In addition, the straw scraps are moved backward by the swinging of the straw rack 28, and during this moving process, the shavings and spikes contained in the straw scraps are separated from the straw scraps, and the front of the combine is separated. To the chaff sheave 26 together with the grains that have leaked from the receiving net 14 again.

In the chaff sheave 26, fine straw chips and the like are sent to the downstream side by the sifting wind and the swing of the chaff sheave 26 itself, and the kernels fall downward to swing the grain sheave 30 below the chaff sheave 26 and the sifting wind. Will be screened by.

Here, in the present embodiment, a wind speed sensor having a wind receiving member for receiving the wind pressure of the selected wind and a rotary actuator for detecting a displacement amount of the wind receiving member is disposed in the wind path. The width of the wind receiving surface of the wind receiving member is wider at a free end side than at a base portion of the rotary actuator attached to a rotating shaft.

That is, as shown in FIG. 1, a wind speed sensor 36 for detecting the wind speed of the sorting wind is provided in the air passage in the dust sorting chamber 16 downstream of the chaff sheave 26. As shown in FIGS. 2 and 3, the wind speed sensor 36 includes a potentiometer 40 attached to the top plate 17 of the dust separation chamber 16 via a bracket 38, and a sensor fixed to a detection shaft 40 a of the potentiometer 40. Feather 4
2 and a stopper 44 for restricting rotation of the sensor blade 42
And

The sensor blades 42 receive the sorting wind and rotate downstream when the sorting device is operated. In order to improve the responsiveness at this time, the sensor blades 42 are provided with fine straw dust and dust. The sensor blades 42 are formed of a lightweight synthetic resin or the like in order to provide sufficient durability against dust and the like.

When the sensor blade 42 receives the sorting wind and rotates around the detection shaft 40a to the downstream side, the rotation angle at that time is detected by the potentiometer 40, and the detection signal is transmitted to a connector 48 described later. Through the fins 26 of the chaff sheave 26 in accordance with the magnitude of the detection signal.
The opening of a is adjusted. The stopper 44 regulates the rotation of the sensor blade 42 upstream from the reference position when the sensor blade 42 is at a substantially vertically installed position.

The bracket 38 is formed of a plate-like body bent substantially in an L-shape. One side fixed surface 38a is attached to the top plate 17 of the dust separation chamber 16, and the other side attachment surface 38b.
Is attached with the potentiometer 40.

In this embodiment, as shown in FIGS. 4 and 5, the wind receiving surface 42 on the free end side of the sensor blade 42 is provided.
a is formed on a curved surface that is curved in the traveling direction of the sorting wind, and the front width of the wind receiving surface 42a of the sensor blade 42 is larger than the width w of the mounting base side to the detection shaft 40a. Also, the front end is formed in a substantially fan shape having a larger width W on the free end side when viewed from the front. By doing so, the sensor blades 42
In addition to making it easier to catch the sorting wind from the front, it is less susceptible to winds other than the sorting wind.

In the wind speed sensor 36, when the wind pressure applied to the sensor blade 42 is large, the rotation angle of the potentiometer 40 is large, and when the wind pressure applied to the sensor blade 42 is small, the rotation angle of the potentiometer 40 is small. By detecting the rotation angle of the potentiometer 40, it is possible to detect the amount of the material to be sorted such as grains on the chaff sheave 26 in a non-contact manner.

Further, as apparent from FIGS. 4 and 5,
The sensor blade 42 has a tongue piece 42b bent at a substantially right angle along the downstream side of the sorting wind on the left side of the front view, and the sensor blade 42 is detected above the tongue piece 42b. An attachment hole 43 for attachment to the shaft 40a is formed.

As shown in FIGS. 6 and 7, the bracket 38 is provided with a connector 48 for preventing the wrapping of straw chips or the like around the detection shaft 40a of the potentiometer 40 and for transmitting and receiving signals to and from the outside. A protection plate 46 is attached to protect the from the wind pressure of the sorting wind and dust.

The protection plate 46 is formed by bending a plate-like body made of synthetic resin or the like at a substantially right angle so as to cover the wind speed sensor 36 from the separation wind. 48 and the other side piece 4
At 6b, the detection shaft 40a of the potentiometer 40 is covered. Further, in order to reduce the wind pressure resistance that the protection plate 46 itself receives from the sorting wind, the other side piece 46 is formed.
The middle part b is bent outward so that the free end side is inclined with respect to the cross section of the air path.

This is because the sorting wind contains fine straw chips and dust and the like, and there is a possibility that the straw chips and the like may be wrapped around the detection shaft 40a and hinder the smooth operation of the detection shaft 40a. We are trying to prevent it.

Next, the operation of the present embodiment will be described.

As shown in FIG. 1, the grains that have been threshed by the handling cylinder 12 are separated and leaked by a receiving net 14, and the grains that have leaked from the receiving net 14 are collected in a dust separation chamber 16. Grains, straw chips, and the like are sorted by swing sorting means 18 that swings back and forth. At the same time, the selected kernels and straw debris pass through the air passage formed between the Karamin fan 20 below the rocking and sorting means 18 and the suction fan 22 disposed behind the straw rack 28. Light unnecessary matter such as straw waste is discharged to the outside by the sorting wind that passes.

The grains and the like leaking from the receiving net 14 fall on the oscillating flow plate 24 below and oscillate the sorting means 18.
At this time, if there are many grains and the like leaking from the receiving net 14 at this time,
6 is also increased. For this reason, the wind speed of the sorting wind passing through many fins 26 a of the chaff sheave 26 is regulated by the grains and the like, and the wind speed reaches the wind speed sensor 36 disposed downstream of the chaff sheave 26 in the dust sorting chamber 16. Wind speed decreases. Conversely, when the amount of grains or the like leaking from the receiving net 14 is small, the rate at which the grains or the like are transferred to the chaff sheave 26 is also small. Disappears, and the wind speed when reaching the wind speed sensor 36 increases.

Therefore, by detecting the wind speed of the sorted wind by the wind speed sensor 36, the chaff sheave 26 is indirectly detected.
The layer thickness of the upper grain or the like can be detected, and the opening of the fin 26a of the chaff sheave 26 is adjusted according to the layer thickness of the grain or the like detected at this time.

Incidentally, the wind receiving surface 42a of the wind speed sensor 36 is formed in a curved surface toward the traveling direction of the sorting wind, and the lateral width of the wind receiving surface 42a in front view is the width of the mounting base side. Since the width W on the free end side is formed wider than w, the sensor blades 42 can easily catch the sorted wind from the front and are less susceptible to winds other than the sorted wind.

[0040]

As described above, according to the present invention, an airflow path of a sorting wind flowing from the upstream side to the downstream side is formed in the dust sorting chamber of the threshing apparatus, and at least the grains and the straw waste etc. are formed by the sorting wind. In the grain sorting device that sorts the sorted objects, a wind speed sensor having a wind receiving member that receives the wind pressure of the selected wind and a rotation actuator that detects a displacement amount of the wind receiving member in the air path. The sorting wind can be satisfactorily sensed by arranging and forming the wind receiving surface width of the wind receiving member so that the free end side is wider than the base side of the rotary actuator attached to the rotating shaft.

Also, the present invention provides the above-mentioned wind speed sensor,
By detecting the amount of material to be sorted on the swing sorting means that is swing-sorted in the dust sorting chamber, the amount of grains on the swing sorting means is detected in detail, and accurate sorting is performed. Control can be performed.

Further, according to the present invention, the wind receiving surface on the free end side of the wind receiving member is formed into a curved surface which is curved in the traveling direction of the sorting wind, so that the sorting wind can be easily captured and the sorting can be performed. It can be made hard to be affected by winds other than the wind.

Further, a tongue piece bent along the direction of the sorting wind is formed on one side of the wind receiving member, and the tongue piece is formed with a mounting hole for the rotating shaft. The sorted wind sensed by the wind receiving member can be transmitted to the rotary shaft with good responsiveness and certainty.

[Brief description of the drawings]

FIG. 1 is a schematic sectional side view of a grain sorting device when a wind speed sensor is installed in a dust sorting chamber.

FIG. 2 is a side view of a wind speed sensor.

FIG. 3 is a front view of a wind speed sensor.

FIG. 4 is a side view of a sensor blade.

FIG. 5 is a front view of a sensor blade.

FIG. 6 is a plan view showing a state in which the wind speed sensor is attached to a bracket, and a protection plate is attached to the bracket.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a schematic sectional side view of a conventional grain sorting device when a float sensor is attached to a lower part of a handling cylinder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Grain sorting apparatus 12 Handling cylinder 14 Receiving net 16 Dust sorting room 17 Top plate 18 Swing sorting means 20 Karamin fan 22 Suction fan 24 Swing flow plate 26 Chaff sheave 26a Fin 28 Straw rack 36 Wind speed sensor 38 Bracket 39 Column bracket 40 Potentiometer 40a Detection axis 42 Sensor blade 42a Wind receiving surface 42b Tongue piece 44 Stopper 46 Protection plate 48 Connector

Claims (4)

[Claims] 1. A grain for forming a wind of a sorting wind flowing from an upstream side to a downstream side in a dust sorting chamber of a threshing device, and at least the sorting wind sorts a grain and a sorting target such as straw waste. In the sorting device, a wind speed sensor having a wind receiving member that receives a wind pressure of the selected wind and a rotation actuator that detects a displacement amount of the wind receiving member is disposed in the wind path. A grain sorting device, wherein a receiving surface width is formed to be wider on a free end side than on a side of a base for attachment of the rotary actuator to a rotary shaft. 2. The grain according to claim 1, wherein the wind speed sensor detects an amount of an object to be sorted on a swing sorting unit that is swing-sorted in the dust sorting chamber. Sorting device. 3. The grain sorting device according to claim 1, wherein a wind receiving surface on a free end side of the wind receiving member is formed as a curved surface that is curved in a traveling direction of the sorting wind. . 4. A tongue bent at one side of the wind receiving member along a traveling direction of the sorting wind, and an attachment hole to the rotating shaft is formed in the tongue. The grain sorting device according to any one of claims 1 to 3, characterized in that: