JPH10178879A - Chaff sieve structure of grain sorter - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to perform good leakage sorting even if there is a bias in a processed material transferred on a chaff sieve. SOLUTION: A large number of chaff plates 10 are laid horizontally on a swing sorting frame 8 at an interval in front and rear, and each of the chaff plates 10 is independently opened and closed around a horizontal axis. The grain sorting device is configured to be elastically supported so as to be swingable, and to be capable of opening and closing in response to a change in the load of the processed material so that the degree of opening increases as the load of the processed material on each chaff plate 10 increases. Chaff sheave structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chaff sheave structure of a grain sorting device provided in, for example, a combine threshing device, in which a large number of chaff plates are juxtaposed at an interval in a swing sorting frame. The present invention relates to a chaff sheave structure of a grain sorting device that is installed in a state where the grain is separated.

[0002]

2. Description of the Related Art Conventionally, in a chaff sheave structure of this kind of grain sorting apparatus, as disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 8-27559, each chaff plate is formed into a series of long link members. It is known that the inclination of each chaff plate is adjusted by the back and forth movement of the link member, thereby adjusting the front-back distance between the chaff plates, and thereby adjusting the degree of leakage of the processed material. Have been. Therefore, in the above-mentioned conventional structure, the overall leakage treatment capability of the chaff sheave having the predetermined installation width in the front and rear directions is uniformly changed and adjusted.

[0003]

By the way, the thickness of the processed material transferred on the chaff sheave is not always uniform.
The processing object is easily transported in a state where the layer thickness is relatively uneven and is relatively uneven. Therefore, in the above-mentioned conventional structure, since the overall leakage treatment capacity of the chaff sheave is uniformly changed and adjusted, when the processing material is transferred on the chaff sheave in a partially biased state, a part of the chaff sheave is partially moved. Even if the chaff sheave leakage processing is performed well in the processed material transport site, the chaff sheave leakage processing may not correspond to the processed material amount in other parts, and the leakage processing becomes insufficient, and the grain There is a possibility that the mixture may be discharged to the outside of the airframe while being mixed in the straw or the like, and there is a possibility that the straw or the like may be mixed in the selected material.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a chaff-sheave structure of a grain sorting apparatus capable of performing a good drop-separation even if there is a bias in a processed material transferred on a chaff sheave. The purpose is to provide.

[0005]

(Structure) The chaff sheave structure of the grain sorting apparatus according to the first aspect of the present invention is configured such that a large number of chaff plates are juxtaposed in a rocking sorting frame at an interval in front and rear. Along with being horizontal, each of the chaff plates is independently and resiliently and elastically supported so as to freely swing, and the degree of opening increases as the load of the processing object on each of the chaff plates increases. It is characterized in that it is configured to be capable of opening and closing in response thereto.

According to the first aspect of the present invention, a large number of chaff plates are laid horizontally on the swing sorting frame in a state where they are juxtaposed at an interval in front and rear, and each of the chaff plates is connected to each other. Separately, it is swingably and elastically supported independently, so that the opening degree increases as the load on the processing object on each chaff plate increases, so that it can be opened and closed according to the fluctuation of the processing object load. Even if the processed material being transferred on the chaff sheave has a quantitative deviation, the chief plate itself can be opened and closed individually in front and rear according to the load of the processed material on the chaff plate. By changing and adjusting, the swinging posture of the individual chaff plate is changed and adjusted so that good grain leakage can be achieved.

(Effects) Therefore, according to the configuration of the first aspect of the present invention, even if there is a partial deviation in the amount of the processed material transferred on the chaff sheave, the leakage treatment is preferably performed for each of the deviations. In this way, the degree of opening and closing of the chaff plate can be changed and adjusted individually, so that the overall leakage sorting process is in an optimal state, and straw etc. are mixed into the selected product and dust discharged outside the machine. It is possible to prevent the grain from being mixed into the straw or the straw.

(Structure) According to a second aspect of the present invention, in the chaff sheave structure of the grain sorting device according to the first aspect, the posture serving as a reference of the inclination of each of the chaff plates can be changed and adjusted in the inclination direction. This is a characteristic configuration.

(Operation) According to the configuration of the second aspect of the present invention, the posture serving as the reference of the inclination of each chaff plate can be changed and adjusted in the inclination direction.
Supply of processed material per unit time according to various conditions such as cutting and padding according to conditions such as wetness of rice paddy and undulation of grain culm in the field and then threshing treatment In order to be able to cope with the amount, the entire chaff sheave is previously set in a state capable of performing an appropriate leaking process, and the gap between the chaff plates is individually adjusted based on the appropriate posture.

(Effects) Therefore, according to the configuration of the second aspect of the present invention, the position of the chaff plate is individually changed from a fixed reference state according to the amount of the processing object on the chaff plate. In addition to being able to properly perform the leaking process and setting the reference posture in advance in accordance with the total amount of processed materials, etc., the reference posture that can respond to the supply amount of the processed material per unit time even in each chaff plate It is possible to suppress the posture adjustment that greatly deviates from, and it is possible to perform a better sorting process.

(Structure) According to a third aspect of the present invention, the chaff sheave structure of the grain sorting apparatus according to the first or second aspect is such that a plurality of the chaff sheaves are laterally arranged side by side on the swing sorting frame. Is characterized in that the degree of change in the posture of each chaff plate with respect to the load of the workpiece is different between the first half and the second half.

According to the third aspect of the present invention, in the first half of the chaff sheave, since the amount of the material to be processed does not leak, the layer thickness of the processed material is relatively large. In the latter half of the process, the amount of material to be treated is reduced, and the material to be treated is transported to the rear in a state where the layer thickness is small, so the posture of the chaff plate of the chaff sheave is changed between the first half and the second half. By changing the degree of processing, it is possible to make a change adjustment with a small posture change ratio corresponding to a state with a large amount of processed objects, while making a change adjustment with a large ratio of posture change corresponding to a state with a small amount of processed objects In particular, it is possible to appropriately perform adjustment in the latter half of the chaff sieve, in which straw or the like is apt to be unduly mixed into the selected material.

(Effects) Therefore, according to the configuration of claim 3 of the present invention, the sorting process can be performed more favorably.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a threshing device mounted on a combine. The threshing device includes a threshing unit A for threshing while transporting the harvested culm passed from a pre-cutting device (not shown) through the feed chain 1 and a sorting unit B for sorting and processing the threshed processed material. And a collection unit C that collects the finely sorted products and returns the roughly sorted products to the sorting unit B.

The sorting unit B is a specific gravity sorting Glen pan 4 for receiving the processed material that has been processed by the cylinder 2 of the threshing unit A and leaked from the receiving net 3 and transports the processed material to the rear, and a processed material from the Glen pan 4. 5 that mainly leaks grain and transports straw and the like backward while transporting the wheat further backwards, Glensheave 6 that carefully sorts out the leakage from the chaff sieve 5 and the like, and twigs and grains from straw and the like. A straw rack 7 for dropping and sorting the grains is provided on the sheave case 8 as a swing sorting frame on the left and right sides, and a Karamin fan 9 for blowing the sorting wind to the grain sieve 6 and the chaff sheave 5 is provided.

The chaff sheave 5 will be described in detail. As shown in FIGS. 1 to 3, a large number of synthetic resin chaff plates 10 # made of a horizontally long plate material are installed between the left and right side wall portions 8A, 8A of the sheave case 8 in a state of being juxtaposed in the front-rear direction. I have. Each chaff plate 10 # is spaced forward and backward by a predetermined distance, and pivotally supports, on the side walls 8A, 8A, support shafts 11, 11 projecting laterally outward from lateral sides of each chaff plate 10. I have. The ends of the winding springs 12 wrapped around the outer circumferences of the left and right support shafts 11 are locked to the side wall 8 </ b> A and the chaff plate 10. The coil spring 12 and the stopper S hold the chaff plate 10 in a downwardly inclined position, and the coil spring 12 moves the chiff plate 10 around the pivot axis X which is the axis of the support shaft 11 in FIG. The right side is elastically biased. Further, when the thresh-treated product is supplied onto the chaff sheave 5, each chaff plate 10
‥ rotates slightly counterclockwise around the pivot axis X in FIG. 2 under the load of the processed object, but each position is in a posture where the elastic biasing force of the winding spring 12 and the processed object load can be balanced. The posture is changed for each chaff plate 10. for that reason,
As the amount of the processing object increases and the load of the processing object acting on each of the chaff plates 10 increases, the posture is changed to a drooping posture that increases the interval between the chaff plates 10 #.

Another Embodiment An embodiment of the invention according to claim 3 will be described below. The description of the same structure as that of the above-described embodiment will be omitted. Along with a large number of synthetic resin chaff plates arranged side by side on the sheave case,
Each chaff plate is pivotally supported on the lateral side wall of the sheave case so as to be swingable around the horizontal axis. Each of the chaff plates is individually elastically urged by a winding spring so as to have a constant inclined posture. In addition, the elastic biasing force of the winding spring for elastically biasing each of the chaff plates in the first half of the chaff sheave (on the upper side in the workpiece transfer direction) is set high, and the second half of the chaff sheave (in the workpiece transfer direction). The elastic biasing force of the winding spring for elastically biasing each of the chaff plates (on the lower side) is set to be lower than that of the first half of the winding spring. Because of this, the amount of processed material supplied from the front onto the chaff sheave is quantitatively large, so that the load of the processed material in the first half of the chaff sheave and the elastic biasing force of the winding spring are balanced, and Thus, the state of the balance between the load of the processed object and the elastic biasing force of the winding spring is made substantially constant.

An embodiment of the invention according to claim 2 will be described below. As shown in FIGS. 4 to 7, long plate members 13 are provided before and after fixed to the left and right side walls 8A, 8A of the sheave case 8, and the long plate members 13 are provided with arms at predetermined intervals in the front and rear directions. A member 14 is pivotally supported around a horizontal axis X1 so as to be freely swingable, and a bridging plate 15 made of a horizontally long plate is connected to a pair of left and right arm members 14,1.
It is erected between four. A chaff plate 16 made of a synthetic resin material is pivotally supported on the arm member 14 at a position slightly lower than the portion where the erection plate member 15 is continuously provided around the horizontal axis X2. That is, the support shaft 17 projecting laterally outward from the lateral edge of the chaff plate 16 is attached to the arm member 14.
It is pivoted. Further, the end portions of the winding springs 18 wrapped around the outer circumferences of the left and right support shafts 17 are locked to the arm member 14 and the chaff plate 16. The chief plate 16 is held by the stopper S protruding from the arm member 14 and the winding spring 18 in a downwardly inclined position with respect to the arm member 14, and the chiff plate 16 is held around the swing center axis X2 in FIG. It is elastically biased clockwise.
Further, each arm member 14 # is pivotally supported at its lower end by a link plate 19 made of a long plate member that is long in the front and rear directions so as to be able to swing around a horizontal axis X3. Left and right link plates 19, 19
Are configured to be displaceably operated in the front-rear direction by an electric actuator 20 via an operation mechanism 22 including a rod 21 and the like, and the electric actuator 20 is mounted on the chaff sheave 5 as shown in FIG. Drive operation by a drive signal from a control device 23 based on a detection signal from a processing amount detection sensor 24 installed on the lower surface of the receiving net 3 in order to detect a layer thickness of the processing object and thus detect a processing amount on the chaff sheave 5. I am trying to be. That is, when the amount of the processed material is large, the control device 23 pulls the link plates 19, 19 backward so that the processed material easily leaks from the chaff sheave 5 and sets the reference value of the interval between the chaff plates 16, 16. Set to be wider. On the contrary, when the amount of the processed material is small, the chaff sheave 5 is hardly leaked.
With the link plates 19, 19 positioned closer to the front, the chaff plate 1
The reference value of the interval between 6 and 16 is set narrower. And
The posture of each of the chaff plates 16 is adjusted based on the inclination posture corresponding to the set reference value, in accordance with the load of the processed object on the chiff plate 16. As means for detecting the amount of processed material, a means for detecting the amount of harvested cereal culm by, for example, detecting the width of cereal culm clamping of the feed chain may be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a combine threshing apparatus.

FIG. 2 is a longitudinal sectional side view showing a main part of a chaff sheave.

FIG. 3 is a longitudinal sectional front view showing a main part of the chaff sheave.

FIG. 4 is an explanatory view showing a chaff sheave and the like according to another embodiment;

FIG. 5 is a side view showing a chaff sheave of another embodiment.

FIG. 6 is a longitudinal sectional front view showing a chaff sheave of another embodiment.

FIG. 7 is a cross-sectional plan view showing a pivot point of a chaff sheave according to another embodiment.

[Explanation of symbols]

 8 swing sorting frame 10 chaff plate

Claims (3)

[Claims] 1. A plurality of chaff plates are horizontally mounted on a swing selection frame in a state where they are juxtaposed in front and rear at intervals, and each of the chaff plates is independently opened and closed around a horizontal axis. A chaff sheave structure of a grain sorting device which is freely elastically supported and is configured to be freely openable and closable in response to a change in the load of the processed material so that the degree of opening increases as the load of the processed material on each chaff plate increases. 2. The chaff sheave structure of a grain sorting device according to claim 1, wherein a tilt posture as a reference in opening and closing swing of each of the chaff plates can be changed and adjusted in a swing direction. 3. A front half and a rear half of a large number of chaff plate groups which are horizontally laid side by side on the swing sorting frame in front and rear,
3. The chaff sheave structure of a grain sorting device according to claim 1, wherein the degree of change in the posture of each chaff plate with respect to the load of the processed material is made different.