JP3416445B2 - Sheave case structure of threshing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects a group of chaf flip plates so as to be capable of interlocking swing movements around lateral fulcrums set at their upper ends so that the opening degree of the chaf sheave can be adjusted according to the amount of processed material on the chaf sheave. The present invention relates to a sheave case structure of a threshing device configured.

[0002]

2. Description of the Related Art Conventionally, as a sheave case structure of a threshing apparatus as described above, as disclosed in, for example, Japanese Patent Application Laid-Open No. 7-227137 and Japanese Patent Application Laid-Open No. 7-274468, a treated product on a chaff sheave is treated. A sensor that detects the layer thickness of the chaff sheave as the amount of processed material, an electric motor that adjusts the opening of the chaff sheave, and a control device that controls the operation of the electric motor based on the detection information from the sensor are provided to determine the amount of processed material on the chaff sheave. There was one configured so that the opening degree of the chaff sheave could be adjusted accordingly.

[0003]

However, according to the above-mentioned conventional technique, it is necessary to provide the sensor, the electric motor, and the control device, which causes a disadvantage that the manufacturing cost increases. Further, in the current electronic control, the opening of the chaff sheave is adjusted stepwise in correspondence with the detection value of the sensor in the preset mode, so that the opening degree of the chaff sheave that appears is There is an error with respect to the optimum opening degree according to the amount of processed material on the chaff sheave, and there is room for improvement in improving the sorting accuracy.

An object of the present invention is to provide a sheave case for a threshing device capable of automatically adjusting the opening degree of the chaff sheave according to the amount of the processed material on the chaff sheave while reducing the manufacturing cost and improving the sorting accuracy. To provide the structure.

[0005]

In order to achieve the above object, in the invention according to claim 1 of the present invention, in the sheave case structure of the threshing apparatus, a group of chaff sheaves of chaff sheaves mounted on the sheave case is provided. The chaff sheave is configured to be adjustable in opening degree by interlockingly swingingly connected around a lateral fulcrum set at each upper end, and biasing means for elastically biasing the chaff sheave toward the closing side is provided to the chaff sheave. It is configured such that the opening degree of the chaff sheave changes depending on the weight of the processed object, and the biasing force of the biasing means at the limit minimum opening degree of the chaf sheave can be set and changed , via the biasing means. The chaff
An operation lever for opening and closing the sheave, and the operation lever
For setting the minimum opening degree of the chaff sheave by the engagement of
A fitting is provided, and the engagement tool is provided with the operation lever.
The operating position where the limit minimum opening of the chaff sheave is set
Further displaced in the closing side direction of the chaff sheave
It is configured so that it can be engaged and held at the operating position.

According to the first aspect of the present invention, as the amount of the processed material deposited on the chaff sheave increases and the weight of the processed material acting on the chaf sheave becomes heavier, the weight resists the elastic biasing of the biasing means. It is possible to increase the opening degree of the chaff sheave in a state that is substantially proportional to the amount of the processed material on the chaf sheave, and conversely, the less the amount of the processed material accumulated on the chaf sheave and the smaller the weight of the processed material acting on the chaf sheave, the more the bias is applied. The elastic biasing of the means makes it possible to reduce the opening degree of the chaff sheave in a state substantially proportional to the amount of processed material on the chaff sheave. That is, a sensor that detects the layer thickness of the processed material on the chaff sheave as the processed material amount, an electric motor that drives the chaf sheave to adjust the opening,
Also, even if a control device for controlling the operation of the electric motor based on the detection information from the sensor is not provided, only the biasing means for elastically biasing the chaff sheave toward the closing side is provided instead of the control device. It becomes possible to automatically adjust the opening degree of the chaff sheave according to the amount of processed material.
Further, with this configuration, maintenance of the chaff sheave can be performed more easily than in the configuration in which the sensor, the electric motor, and the control device are provided.

Moreover, the opening degree of the chaff sheave is directly controlled by the weight of the processed material on the chaff sheave,
Since the opening of the chaff sheave can be adjusted swiftly in a state that is approximately proportional to the amount of processed material on the chaff sheave, it is possible to perform step-by-step operations corresponding to the detected value of the sensor in the preset mode like the current electronic control. Compared to the case of adjusting the opening of the chaff sheave, the error between the opening of the chaff sheave that appears and the optimal opening of the chaff sheave according to the amount of processed material on the chaff sheave can be made extremely small. become.

In addition, by changing the setting of the urging force of the urging means at the limit minimum opening of the chaf sheave, the value of the weight of the processed material at which the opening operation of the chaf sheave is started, in other words, the weight of the processed material on the chaf sheave. It is possible to change the difficulty level of the chaff sheave opening adjustment operation according to the type of crop to be harvested and the wetness. For example, if the type of crop to be harvested is rice and the culm is supple and cutting straw is unlikely to occur during threshing processing, most of the processed material deposited on the chaff sieve is a grain, By weakening the urging force of the urging means and facilitating the operation of adjusting the opening degree of the chaff sheave by the weight of the processed material on the chaff sheave, the leakage of grains from the chaff sheave is promoted while suppressing the deterioration of the sorting accuracy. It is possible to improve the sorting efficiency. On the other hand, if the type of crop to be harvested is wheat-like culm and is not lithe and liable to produce broken straws during the threshing process, a large amount of broken straws will appear in the treated material accumulated on the chaff sieve. Since it is included in the chaff sheave, the urging force of the urging means is increased to make it difficult to adjust the opening degree of the chaf sheave by the weight of the processed material on the chaf sheave, thereby suppressing the leakage of the broken straw from the chaf sheave. It is possible to improve the sorting accuracy. Also, for example,
If the crop to be harvested is wet and difficult to leak from the chaff sheave, weaken the biasing force of the biasing means to facilitate the operation of adjusting the opening degree of the chaf sheave by the weight of the processed material on the chaf sheave. , It is possible to make it easy to leak the processed material on the chaff sheave from the chaff sieve,
Since it is possible to suppress clogging of the processed material in the chaff sheave, it is possible to improve the selection efficiency. Conversely, if the crop to be harvested is dry and easily leaks from the chaff sheave, the biasing force of the biasing means is increased to adjust the opening degree of the chaf sheave according to the weight of the processed material on the chaf sheave. By making it difficult, it is possible to make it difficult for the treated material on the chaff sheave to leak from the chaff sheave, and it is possible to suppress the leakage of the cut straws contained in the treated material from the chaff sheave, so that the sorting accuracy can be improved. become.

Therefore, while simplifying the structure, reducing the manufacturing cost, and improving the maintainability, it is possible to automatically adjust the opening degree of the chaff sheave according to the amount of the processed matter on the chaff sheave, and the type of crop to be harvested. It has become possible to provide a sheave case structure of a threshing device capable of improving sorting accuracy and sorting efficiency by changing the setting of the biasing force of the biasing means in consideration of the degree of wetting.

[0010]

Then, by engaging the operating lever with the engaging member at a desired operating position which is displaced further toward the closing side of the chaff sheave than the operating position where the limit minimum opening of the chaff sheave is set, Similarly to the invention described in claim 1, the degree of difficulty of adjusting the opening degree of the chaff sheave by the weight of the processed matter on the chaff sheave can be changed according to the kind of the crop to be harvested, the wet condition, and the like. By engaging the engagement tool at a desired operation position that is displaced in the opening side direction of the chaf sheave from the operation position where the limit minimum opening of the chaf sheave is set. Depending on the type of crop to be harvested and the degree of wetting, without changing the urging force (the degree of difficulty in adjusting the opening of the chaff sheave depending on the weight of the processed material on the chaff sheave) It will be able to further.

[0012] That is, for example, when the type of crop to be harvested is rice, which has a flexible culm and is unlikely to cause broken straw during threshing, most of the products deposited on the chaff sieve are grains. Therefore, the operation lever is engaged with the engaging device at a desired operation position that is largely displaced in the opening direction of the chaf sheave from the operation position where the limit minimum opening of the chaf sheave is set, and the minimum opening of the chaf sheave is performed. By setting the degree to a large degree, it is possible to promote the leakage of grains from the chaff sheaves while suppressing a decrease in the sorting accuracy, and improve the sorting efficiency. On the other hand, if the type of crop to be harvested is wheat-like culm and is not lithe and liable to produce broken straws during the threshing process, a large amount of broken straws will appear in the treated material accumulated on the chaff sieve. Since it will be included in the engaging tool at the operating position where the limit minimum opening of the chaff sheave is set, or a desired operating position that is slightly displaced from the operating position in the opening direction of the chaff sheave. Engage,
By setting the minimum opening degree of the chaff sheave small, it is possible to suppress the leakage of the broken straw from the chaff sheave and improve the sorting accuracy.

Further, for example, when the crop to be harvested is wet and it is difficult for the crop to leak from the chaff sheave, the operation lever is greatly moved from the operation position where the limit minimum opening of the chaff sheave is set to the opening side of the chaff sheave. By engaging the engagement tool at the displaced desired operation position and setting the minimum opening of the chaff sheave large, it is possible to facilitate the leakage of the processed material on the chaff sheave from the chaff sheave. Since it is possible to suppress the clogging of the processed material in step 1, it is possible to improve the selection efficiency. Conversely, if the crop to be harvested is dry and easily leaks from the chaff sheave, move the operating lever to the operating position where the limit minimum opening of the chaff sheave is set, or from the operating position to the opening side of the chaf sheave. By engaging the engagement tool at a desired operation position that is slightly displaced in the direction and setting the minimum opening of the chaff sheave small, it is possible to make it difficult for the processed material on the chaff sheave to leak from the chaff sheave. Therefore, it is possible to suppress the leakage of the broken straw contained in the processed product from the chaff sheaves, so that the sorting accuracy can be improved.

Further, for example, a crop to be harvested is one in which many pieces of broken straw are contained in the treated material accumulated on the chaff sheave, such as wheat, in which pieces of straw are liable to be generated during threshing processing, and the chaff sheave is dry. If it easily leaks, engage the engaging lever at the operating position that is displaced further toward the closing side of the chaff sheave than the operating position where the limit minimum opening of the chaff sheave is set. By making it difficult to adjust the opening degree of the chaff sheave by the weight of the processed material on the chaf sheave, it is possible to more effectively suppress the leakage of the cut straw contained in the processed material on the chaf sheave from the chaf sheave. The sorting accuracy can be further improved.

Moreover, since the setting degree of the degree of difficulty in adjusting the opening degree of the chaff sheave depending on the minimum opening degree of the chaff sheave and the weight of the object to be treated on the chaff sheave can be changed by changing the engaging position of the operating lever with respect to the engaging tool, It is advantageous in terms of operability.

Therefore, while simplifying the structure, reducing the manufacturing cost, and improving the maintainability, it is possible to automatically adjust the opening degree of the chaff sheave according to the amount of the processed material on the chaff sheave, and the type of crop to be harvested. It is possible to further improve the sorting accuracy and sorting efficiency by changing the setting of the minimum opening of the chaff sheave and the biasing force of the biasing means in consideration of the wet condition, and further, the minimum opening and biasing of the chaff sheave. It has become possible to provide a sheave case structure of a threshing device that is excellent in operability when changing the setting of the biasing force of the means.

According to the second aspect of the present invention,
In the invention according to claim 1 , an adjuster for changing the urging force of the urging means is provided between the urging means and the chaff sheave or between the urging means and the operation lever.

According to the invention described in claim 2 , for example, by simply providing an adjuster composed of bolts and nuts between the urging means and the chaff sheave, the invention described in claim 1 can be achieved. Similarly, it becomes possible to change the degree of difficulty of the operation for adjusting the opening degree of the chaff sheave by the weight of the processed material on the chaff sheave according to the type of the crop to be harvested, the wet condition, and the like. Further, the above claim 1
When the configuration of the invention described in claim 2 is adopted in the above invention, the urging force of the urging means at each minimum opening of the chaff sheave set by the operation lever (the opening adjustment operation of the chaff sheave depending on the weight of the processing object on the chaff sheave) The degree of difficulty) can be changed, and the adjustment range of the urging force of the urging means at the limit minimum opening degree of the chaff sheave can be increased. In other words, it becomes possible to set the state of the chaff sheave to a more suitable state according to the type of crop to be harvested, the degree of wetness, and the like.

Therefore, while further simplifying the configuration, the biasing force of the biasing means can be changed according to the type of crop to be harvested and the wet condition, thereby further improving the sorting accuracy and sorting. It is possible to provide a sheave case structure of a threshing device capable of improving efficiency, and
By combining the setting change of the minimum opening of the chaff sheave and the setting change of the urging force of the urging means, it is possible to set the state of the chaf sheave to a more adapted state, such as the type of crop to be harvested and the wet condition. Further, it has also become possible to provide a sheave case structure of a threshing device capable of improving sorting accuracy and sorting efficiency.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a vertical left side of a threshing device mounted on a combine. This threshing device has a feed chain 1 provided on its left side, and the harvested grain is held and conveyed in a horizontal position. The threshing part A that performs threshing treatment on the tip side of the culm, the sorting part B that sorts the processed products from the threshing part A, and the first of the processed products sorted by the sorting part B And a recovery unit C for recovering the second object.

The threshing part A is a handling barrel 2 which is driven to rotate about the front-rear axis P1, a receiving net 3 provided on the lower side of the handling barrel 2, and a dust delivery port 4 formed behind the receiving net 3. , And the like, and separates the grain from the harvested culm that is held and conveyed by the feed chain 1 and allows the single grain and the broken straw to leak from the receiving net 3 and from the receiving net 3. Grains that have not leaked or broken straw are discharged from the dust inlet 4.

The sorting section B is a sheave case 6 disposed below the receiving net 3 in a state in which both front portions are suspended and supported by a support arm 5 which is swingable back and forth (see FIG. 2), and the sheave case 6. The sheave case 6 is oscillated by the operation of the crank mechanism 8 attached to the rear portion of the sheave case 6, so that the treated product from the threshing portion A is changed. In addition to performing sieving and screening, the Kara Mino 7 supplies the sorting air to the sheave case 6 to add wind screening to the processed material to be sieved by the sheave case 6. And by these selection operations, the processed product from the threshing part A is mixed with the grain as the first product, the grain as the second product and the cut straw, and the cut straw as the third product. And so on.

The recovery section C is disposed below the sheave case 6 behind the Karako 7 and the first item recovery section 9, and below the sheave case 6 is disposed behind the first object recovery section 9. The object recovery unit 10 and the like. The first item recovery unit 9 collects the first item among the processed items sorted by the sorting unit B, and the collected first item is the first screw placed in the left-right direction at the bottom thereof. The feeding screw 11 is configured to convey to the lifting screw 12 that is connected to the right end of the feeding screw 12. Second object recovery unit 10
Collects the second product of the processed products sorted by the sorting unit B, and collects the second product by the second screw 13 arranged in the left and right directions at the bottom thereof.
It is configured to be conveyed toward the second reduction screw 14 that is connected to the right end of the second reduction screw 14. It should be noted that the lifting screw 12 lifts the first product conveyed by the first screw 11 and supplies it from above to a reservoir (not shown) arranged in parallel on the right side of the threshing device. It is configured. Further, the second reduction screw 14 is configured to lift up the second object conveyed by the second screw 13 and reduce it to the sheave case 6.

As shown in FIGS. 2 and 3, the sheave case 6 includes a first gren pan 15 provided at the upper front end of the sheave case 6 and a first chaff sheave arranged so as to be continuous with the rear end of the first gren pan 15. (The chaff sheave according to the claims) 16, the second gren pan 17, and the second gren pan 1 arranged so as to be continuous with the rear end of the first chaff sheave 16.
The first stroll rack 18 extending rearward from the upper surface of the second chamfer 7, the second chaff sheave 19 arranged to be connected to the rear end of the second Glen pan 17, and the second chaff sheave 19 arranged to be connected to the rear end of the second chaff sheave 19. 2nd Straw Rack 2
0, a third gren pan 21 arranged below the first chaff sheave 16, and a gren sheave 22 arranged so as to be continuous with the rear end of the third glen pan 21. The first gren pan 15 receives the leaked processed material from the front side of the receiving net 3, sorts the specific gravity, and transfers the processed material backward. The first chaff sheave 16 coarsely selects grains such as grains from the processed products leaked from the rear side of the receiving net 3 and the processed products transferred by the first gren pan 15, and causes the remaining processed products to leak. It is designed to be transferred to the rear. First Straw Rack 18
Is configured to sieve and select grains such as grains from the processed products supplied from the dust supply port 4 to cause leakage, and transfer the remaining processed products to the rear. Second Glen Pan 1
7 is adapted to transfer the processed material leaking through the first Straw rack 18 toward the rear while selecting the specific gravity. The second chaff sheave 19 roughly selects grains and the like from the processed products transferred by the second Glen Pan 17 and the processed products that have passed through the first straw rack 18, and the second product recovery unit 1
It is designed to leak to 0 and to transfer the remaining processed material to the rear. Second Stroke 20
Sieves and sorts grains and the like from the processed products transferred by the second chaff sheave 19 and causes them to leak to the second product recovery unit 10, and transfers the remaining processed products rearward to the outside of the machine. It is designed to be discharged. Third Glen Pan 21
Is configured to transfer the processed material leaked from the first chaff sheave 16 toward the rear while selecting the specific gravity.
The grain sieve 22 carefully selects the grains from the processed materials transferred from the third Glen pan 21 and the processed materials supplied from the first chaff sheave 16 and causes the grains to leak to the first material recovery section 9, and the remaining processed materials. It is designed to be transferred to the rear.

Behind the gren sheave 22, a standing posture for guiding the processed material transferred rearward by the gren sheave 22 to the first object recovery section 9 arranged below the gren sheave 22, and a lower rear part of the gren sheave 22. The rear fall posture that guides the second article collecting section 10 provided in the second embodiment is equipped with a sorting adjustment plate 23 that can switch the posture around the lateral fulcrum P2 set at the lower rear of the gren sheave 22.
The configuration of the selection adjustment plate 23 will be described in detail. As shown in FIGS. 4 to 6, the selection adjustment plate 23 is supported on the left and right side walls 24, which are the side walls of the sheave case 6, so that the selection adjustment plate 23 can swing back and forth around the lateral fulcrum P2. At the same time, the operation arm 25 is integrally swingably fixed to the left end side thereof. Operating arm 25
At the free end of the link pin 25a protruding toward the left outer side
Is equipped with. On the left side wall 24 of the sheave case 6,
An arc-shaped elongated hole 24a centering on a lateral fulcrum P2 through which the linking pin 25a is inserted is formed, and the left side wall 24 is formed.
The engaging pin 24b is provided so as to protrude from the lateral outer surface on the front side in the leftward outward direction. At the insertion end of the linking pin 25a, which has been inserted through the long hole 24a, a flat plate-shaped operating rod 26 is attached which extends toward the engaging pin 24b located in front of the linking pin 25a along the lateral outer surface of the left side wall 24. ing.
The extended end of the operating rod 26 is provided with a first engaging hole 26 for holding the selection adjusting plate 23 in a standing posture by engaging with the engaging pin 24b.
A and a second engagement hole 26b for holding the rear fallen posture are provided. That is, as shown in (a) of FIG. 5, by engaging the first engaging hole 26a of the operating rod 26 with the engaging pin 24b of the sheave case 6, the selection adjusting plate 23 is switched to the standing posture and held. Therefore, it is possible to guide the processed material transferred rearward by the Glensieeve 22 to the first object recovery section 9 arranged below the Glensieeve 22. Further, as shown in (b) of FIG. 5, by engaging the second engaging hole 26b of the operating rod 26 with the engaging pin 24b of the sheave case 6, the selection adjusting plate 23 is switched and held in the backward laid posture. You can
The processed material transferred rearward by the Glensieve 22 can be guided to the second material collecting section 10 arranged below the Glensieve 22.

With the above configuration, for example, when the harvested crop has a tendency to generate broken straws during the threshing process, such as wheat, the posture of the selection adjusting plate 23 provided behind the Glensieve 22 is rearwardly lowered. By switching to the posture, the Glen Sieve 2 can be prevented from leaking from the Glen Sieve 22.
The second item containing many broken straws transferred to the rear end of 2 can be guided to the second object collecting section 10, whereby the second object containing many broken straws can be guided. It is possible to prevent the second thing from the second thing collecting section 10 and the second screw 13 while being prevented from being collected by the first thing collecting section 9.
And the sheave case 6 through the second reduction screw 14
It is possible to re-sort it into grains and broken straws. That is, when the harvested crop is wheat or the like, the sorting accuracy can be improved by switching the sorting adjustment plate 23 to the backward lying posture.

On the contrary, for example, when the harvested crop is rice, which does not easily generate broken straws during the threshing process, the sorting control plate 2 provided behind the Glen sieve 22.
By switching the posture of No. 3 to the standing posture, guiding the second object, which is mostly grains, transferred to the rear end of the Glen sieve 22 from the Glen Sheave 22 to the No. 1 object collecting section 9 without leaking. As a result, the second product, which is mostly grains, is transferred from the first product recovery unit 9 to the first storage screw 11 and the lifting screw 12 to the storage unit without the need for re-sorting in the sheave case 6. It can be supplied. That is, when the harvested crop is rice or the like, the sorting efficiency can be improved by switching the sorting control plate 23 to the standing posture.

As shown by the chain double-dashed line in FIGS. 1 and 4, on the front side of the left side wall of the threshing device, for checking the sorting accuracy of the first item collected by the first item collecting section 9. A rectangular inspection port 27 is formed from the lateral side of the front part of the sheave case 6 to a position above the first object recovery part 9. From this inspection port 27, an operating rod for the engagement pin 24b of the sheave case 6 is formed. 26 of the first engaging hole 26a or the second engaging hole 26
It is possible to easily perform the engagement operation or the engagement release operation of b. That is, by extending the operating rod 26 for operating the selection adjusting plate 23 toward the front, the existing inspection port 27 can be effectively used when the posture of the selection adjusting plate 23 is switched and operated. It is possible to save the trouble of newly providing an opening for operating the sorting control plate 23 on the left side wall of the threshing device, and to easily perform the posture switching holding operation of the sorting control plate 23 from one lateral side of the sheave case 6. It has become.

As shown in FIGS. 3, 4 and 7, the first chaff sheave 16 connects the group of chaf flip plates 16A arranged side by side in the front-rear direction around the lateral fulcrums P3 set at their upper ends. It is configured to be pivotally connected to the left and right side walls 24 of the sheave case 6 via a connecting member 28 so as to be freely swingable, and the lower ends thereof are interlockingly connected by a connecting plate 29 so that the opening degree can be adjusted. ing. The first chaff sheave 16 is elastically biased toward the closing side by the biasing means Z including the coil spring 30. According to the above configuration, as the amount of the processed material accumulated on the first chaf sheave 16 increases and the weight of the processed material acting on the first chaf sheave 16 becomes heavier, the weight is substantially proportional to the amount of the processed material on the first chaf sheave 16. Can increase the opening degree of the first chaff sheave 16, and conversely, as the amount of the processed material accumulated on the first chaf sheave 16 decreases and the weight of the processed material acting on the first chaf sheave 16 decreases, the biasing means is provided. By the elastic bias of Z, the opening degree of the first chaf sheave 16 can be reduced in a state substantially proportional to the amount of the processed material on the first chaf sheave 16. That is, the first chaff sheave 16 is configured to be openable and closable, and the biasing means Z that elastically biases the first chaff sheave 16 toward the closing side is provided.
The opening degree of the first chaff sheave 16 can be automatically adjusted according to the amount of the processed material. Moreover, since the opening degree of the first chaff sheave 16 is directly controlled by the weight of the processed matter on the first chaff sheave 16, the opening degree of the first chaff sheave 16 is substantially proportional to the amount of the treated matter on the first chaf sheave 16. Since it can be performed swiftly in the state, the error between the opening degree of the first chaff sheave 16 and the optimal opening degree of the first chaff sheave 16 according to the amount of processed material on the first chaff sheave 16 is extremely small. You can do it. In short, while simplifying the configuration and reducing the manufacturing cost, it is possible to automatically adjust the opening degree of the first chaff sheave 16 according to the amount of processed material on the first chaff sheave 16 and improve the sorting accuracy. It has become.

As shown in FIGS. 8 to 10, the cha flip plates 16A are pivotally attached to the left and right side walls 24 of the sheave case 6 through the connecting members 28 at the left and right end portions of the upper ends of the cha flip plates 16A. Pivot connection part 1 for supporting connection
6a is formed, and an upper end portion 16b of each chaf flip plate 16A other than the pivotal support portion 16a is recessed so as not to project above the lateral fulcrum P3. With the above configuration, it is possible to prevent the processed material on the first chaf sheave 16 from becoming a resistance when the opening degree of the first chaf sheave 16 is increased by the weight of the processed material on the first chaf sheave 16, so that the first chaf sheave 16 can be suppressed. The opening degree of the first chaf sheave 16 can be adjusted more accurately according to the weight of the upper processed material in a state suitable for the amount of the processed material on the first chaf sheave 16.

As shown in FIGS. 4, 7 and 8, a pin 31 protruding toward the left outer side is attached to the free end of the second chalip plate 16A from the rear of the first chaff sheave 16. There is. On the other hand, the left side wall 24 of the sheave case 6 is formed with an elongated hole 24c that allows the pin 31 to move along with the opening / closing operation of the first chaff sheave 16. The long hole 24c is the chaflip plate 16 to which the pin 31 is attached.
The first chaff sheave 16 is in a limit minimum opening state (substantially fully closed state) in a state in which the first chaff sheave 16 is formed in an arc shape centered on a lateral fulcrum P3 which is a swing fulcrum of A, and the pin 31 abuts on its front end.
In addition, when the pin 31 is in contact with the rear end of the first chaf sheave 16, the first chaff sheave 16 is in the maximum limit opening state (fully opened state).
Therefore, the movement of the pin 31 associated with the opening / closing operation of the first chaff sheave 16 is restricted. An operation lever 32 for opening and closing the first chaff sheave 16 is provided laterally outside the left side wall 24 of the sheave case 6. The operation lever 32 is pivotally connected to a swinging fulcrum shaft 33 supporting the second chaflip plate 16A from the rear of the first chaff sheave 16 so as to be swingable around its axis P3, and the swinging fulcrum thereof is also supported. An arcuate long hole 32a centering on the swing fulcrum shaft 33 (lateral fulcrum P3) is formed at the side portion. Then, the upper portion of the operation lever 32 above the elongated hole 32a and the chaflip plate 1
A coil spring 30 that elastically biases the above-mentioned first chaff sheave 16 toward the closing side is stretched over the pin 31 attached to the free end of 6A. That is, the operating lever 32
Allows the pin 31 to move in accordance with the opening / closing operation of the first chaff sheave 16 and swings around the axis P3 to open / close the first chaff sheave 16 via the coil spring 30. There is. By the way,
By swinging the operation lever 32 rearward,
The opening degree of the first chaff sheave 16 can be increased,
Further, by swinging the operation lever 32 forward, the opening degree of the first chaff sheave 16 can be reduced.

As shown in FIGS. 4 and 7, at the front lower portion of the elongated hole 24c in the left side wall 24 of the sheave case 6, a predetermined interval is provided on a curved line drawn around the swing fulcrum shaft 33. An engagement tool 34 is provided that is configured by the first engagement pin 34a to the sixth engagement pin 34f that are provided in a juxtaposed manner and project outwardly. On the other hand, the operating lever 3
On the free end side of 2, the first engaging pin 34a to the sixth engaging pin 3
4f is formed with an engagement hole 32b which can be engaged alternatively, and by engaging this engagement hole 32b with any of the first engagement pin 34a to the sixth engagement pin 34f, The operation lever 32 can be held in the operation position. When the operation lever 32 is held in any operation position, the left side wall 24 of the sheave case 6 corresponding to the operation position is held.
The degree of overlap between the long hole 24c and the long hole 32a of the operation lever 32 is revealed, and the movement range of the pin 31 of the chaflip plate 16A is set. That is, by engaging the operation lever 32 with any of the first engaging pin 34a to the sixth engaging pin 34f, the minimum opening degree and the maximum opening degree of the first chaff sheave 16 can be set according to the type of crop to be harvested or It can be set according to the wet condition.

The operating lever 32 has its elongated hole 32b in a state of being engaged with the fourth engaging pin 34d of the engaging member 34.
The front end of the long hole 24c of the left side wall 24 and the front end of the long hole 24c of the left side wall 24, and swings from the first line L1 that connects the swinging fulcrum shaft 33, which is the swinging fulcrum of the operating lever 32, and the first engaging pin 34a. The elongated hole 32b is formed so that the pin 31 of the chaflip plate 16A is allowed to move within the range extending along the fifth line L5 connecting the fulcrum shaft 33 and the fifth engagement pin 34e.
The length and mounting posture are set. As a result, when setting the minimum opening and maximum opening of the first chaff sheave 16, the operation lever 32 is moved to the first engagement pin 34a.
When engaging with any of the third engagement pins 34c, the coil spring 30 extends and the first chaff sheave 16 expands as the operation lever 32 is operated toward the first engagement pin 34a.
The urging force to the closing side at the minimum opening of is increased. That is, the operating lever 32 is attached to the engagement tool 34.
Is engaged and held at an operation position further displaced in the closing side direction of the first chaf sheave 16 than the position of the fourth engagement pin 34d, which is the operation position where the limit minimum opening of the first chaff sheave 16 is set. Engagement pin 34a to third engagement pin 34
c, and the operation lever 32 is engaged with any one of the first engagement pin 34a to the third engagement pin 34c, so that the urging force of the coil spring 30 at the limit minimum opening degree of the first chaff sheave 16 is increased. You can change the setting
The value of the weight of the processed material at which the opening operation of the first chaf sheave 16 is started, in other words, the degree of difficulty of the operation for adjusting the opening degree of the first chaf sheave 16 depending on the weight of the processed material on the first chaf sheave 16 is defined as the type of crop to be harvested. It can be set according to the wetness and the like.

When the operating lever 32 is engaged with any of the fourth engaging pin 34d to the sixth engaging pin 34f when setting the minimum opening and maximum opening of the first chaff sheave 16. Since the coil spring 30 moves together with the operation lever 32 in the operating direction, the biasing force of the coil spring 30 at the minimum opening degree of each first chaf sheave 16 is set to the same value. That is, in the range of the fourth engagement pin 34d to the sixth engagement pin 34f, the value of the weight of the processed material at which the opening operation of the first chaf sheave 16 is started, that is, the weight of the processed material on the first chaf sheave 16 is determined. The minimum opening and maximum opening of the first chaff sheave 16 can be changed according to the type of crop to be harvested and the degree of wetness without changing the degree of difficulty in adjusting the opening of the first chaff sheave 16. There is.

Hereinafter, the operation lever 32 is attached to the first engagement pin 34.
The minimum opening degree and the maximum opening degree of the first chaff sheave 16 and the biasing force of the coil spring 30, which are set when they are engaged with each of the a to sixth engagement pins 34f, will be described in detail.

When the operating lever 32 is engaged with the first engaging pin 32a, the operating lever 32 is moved to the fourth engaging pin 34d, which is the operating position where the limit minimum opening of the first chaff sheave 16 is set. Since the engagement is held at the operation position that is displaced to the closing side direction of the first chaff sheave 16 more than the position, the biasing force of the coil spring 30 can be increased and the processing on the first chaff sheave 16 can be performed. The operation of adjusting the opening degree of the first chaff sheave 16 depending on the weight of the object can be set in a more difficult state, and the swing fulcrum shaft 33 and the second engagement pin 34b can be set on the first line L1.
The elongated hole 32b of the operation lever 32 is moved to the elongated hole 24c of the left side wall 24 in a state in which the pin 31 of the chaflip plate 16A is allowed to move within a range substantially on the second line L2 connecting Because of the overlapping, the minimum opening degree of the first chaff sheave 16 at this operating position is the minimum opening degree state (the pin 31 of the chaf flip plate 16A is in contact with the front end of the long hole 24c of the left side wall 24). (Closed state), and the maximum opening of the first chaff sheave 16 is positioned on the approximate line of the second line L2 with the pin 31 of the chaf flip plate 16A abutting the rear end of the long hole 32b of the operating lever 32. A small opening state can be set.

When the operation lever 32 is engaged with the second engagement pin 32b, the operation lever 32 is moved to the fourth engagement pin 34d which is the operation position where the limit minimum opening of the first chaff sheave 16 is set. First chaff sheave 16 larger than position
Since the engagement is held at the operation position displaced in the closing side direction, the biasing force of the coil spring 30 can be increased and the opening of the first chaff sheave 16 due to the weight of the processing object on the first chaff sheave 16 can be increased. It is possible to set a state in which it is difficult to perform the degree adjusting operation, and within a range extending from on the line of the first line L1 to on the approximate line of the third line L3 connecting the swing fulcrum shaft 33 and the third engaging pin 34c. The left side wall 24 is placed in a state where the pin 31 of the chaflip plate 16A is allowed to move.
Since the long hole 32b of the operation lever 32 overlaps the long hole 24c of the first lever, the minimum opening of the first chaff sheave 16 at this operation position is determined by the pin 31 of the chaf flip plate 16A. It can be set to a limit minimum opening state (substantially fully closed state) that contacts the front end of 24c,
Set the maximum opening of the first chaff sheave 16 to the chaflip plate 1
The pin 31 of 6A is in contact with the rear end of the elongated hole 32b of the operation lever 32 and can be set to a relatively small opening state located on the approximate line of the third line L3.

When the operation lever 32 is engaged with the third engagement pin 32c, the operation lever 32 is moved to the fourth engagement pin 34d which is the operation position where the limit minimum opening of the first chaff sheave 16 is set. Since the engagement is held at the operation position that is displaced toward the closing side of the first chaff sheave 16 a little from the position, the biasing force of the coil spring 30 can be increased a little, and the processing object on the first chaff sheave 16 can be slightly increased. It is possible to set the opening degree adjustment operation of the first chaff sheave 16 due to the weight of the first chaf sheave 16 to be a little difficult to perform, and the first line L1
In the range extending from the line above to the approximate line of the fourth line L4 connecting the swing fulcrum shaft 33 and the fourth engaging pin 34d, the cha flip plate 1
In a state in which the pin 31 of 6A is allowed to move, the long hole 32 of the operating lever 32 with respect to the long hole 24c of the left side wall 24
Since b is overlapped, the minimum opening degree of the first chaff sheave 16 at this operation position is set to the chaflip plate 1
The pin 31 of 6A can be set to a limit minimum opening state (substantially fully closed state) in which it contacts the front end of the elongated hole 24c of the left side wall 24, and the maximum opening degree of the first chaff sheave 16 is set to the pin of the chaflip plate 16A. 31 is in contact with the rear end of the long hole 32b of the operating lever 32 and can be set to a standard opening state located on the approximate line of the fourth line L4.

When the operating lever 32 is engaged with the fourth engaging pin 32d, as described above, the operating lever 32 is the operating position where the limit minimum opening of the first chaff sheave 16 is set. Since the engagement pin 34d is engaged and held at the position of the dowel pin 34d, the biasing force of the coil spring 30 can be made to have an original magnitude, and the opening degree of the first chaff sheave 16 depending on the weight of the processed material on the first chaff sheave 16. The adjustment operation can be set to a state where it can be performed normally, and in the range from the line of the first line L1 to the line of the fifth line L5,
Since the elongated hole 32b of the operation lever 32 overlaps the elongated hole 24c of the left side wall 24 in a state in which the pin 31 of the chaf flip plate 16A is allowed to move, the first chaff sheave 16 at this operating position The minimum opening of
The pin 31 of the char flip plate 16A is the long hole 2 of the left side wall 24.
Limiting minimum opening state that contacts the front end of 4c (almost fully closed state)
In addition, the maximum opening of the first chaff sheave 16 can be set by setting the pin 31 of the chaf flip plate 16A to the operation lever 3
The second opening 32b is brought into contact with the rear end of the second elongated hole 32b so that the opening can be set to a relatively large opening position on the fifth line L5.

When the operation lever 32 is engaged with the fifth engagement pin 32e, the operation lever 32 is moved to the fourth engagement pin 34d which is the operation position where the limit minimum opening of the first chaff sheave 16 is set. Since the engagement is held at the operating position displaced in the opening side direction of the first chaff sheave 16 rather than the position, the biasing force of the coil spring 30 can be maintained at the original magnitude and the first chaff sheave 16 can be maintained. It is possible to set the state in which the opening degree adjusting operation of the first chaff sheave 16 can be normally performed by the weight of the processed object, and the swinging fulcrum shaft 33 and the sixth engaging pin 34f can be set from the approximate line of the second line L2.
The elongated hole 32b of the operation lever 32 is set to the elongated hole 24c of the left side wall 24 in a state in which the pin 31 of the chaflip plate 16A is allowed to move within a range substantially on the sixth line L6 connecting the Since they overlap, the minimum opening of the first chaff sheave 16 at this operation position is determined by the pin 31 of the chaf flip plate 16A and the long hole 32b of the operation lever 32.
Can be set to a comparatively large opening state in which it is in contact with the front end of the second line L2, and the maximum opening degree of the first chaff sheave 16 can be set to the pin 3 of the chaflip plate 16A.
1 is in contact with the rear end of the long hole 32b of the operation lever 32 and can be set to a large opening state located on the approximate line of the sixth line L6.

When the operation lever 32 is engaged with the sixth engagement pin 32f, the operation lever 32 is moved to the fourth engagement pin 34d which is the operation position where the limit minimum opening of the first chaff sheave 16 is set. Since the engagement is held at the operating position displaced in the opening side direction of the first chaff sheave 16 rather than the position, the biasing force of the coil spring 30 can be maintained at the original magnitude and the first chaff sheave 16 can be maintained. It is possible to set a state in which the opening adjustment operation of the first chaff sheave 16 depending on the weight of the processed object can be normally performed, and the rear end of the long hole 32a of the operation lever 32 and the rear end of the long hole 24c of the left side wall 24 are formed. And the pin 31 of the chaflip plate 16A is moved within a range in which the rear end of the elongated hole 24c of the left side wall 24 is abutted from above the third line L3 over the sixth line L6. Allowable state Since the elongated hole 32b of the operating lever 32 overlaps the elongated hole 24c of the left side wall 24, the pin 31 of the chaf flip plate 16A is operated by the operating lever when the minimum opening of the first chaff sheave 16 is in this operating position. The opening degree of the first chaff sheave 16 can be set to a large opening state that is in contact with the front end of the long hole 32b of 32 and is located on the approximate line of the third line L3, and the maximum opening degree of the first chaff sheave 16 can be set to the chaflip plate 16A.
The pin 31 can contact the rear end of the long hole 24c of the left side wall 24 and can be set to a limit maximum opening state (fully open state).

From the above-mentioned constitution, for example, the more the crops to be harvested, such as wheat, are liable to cause broken straws during the threshing process, and those which are dry and easily leak from the first chaff sheave 16. , The operation lever 32, the first engagement pin 3 of the first engagement pin 34a ~ the sixth engagement pin 34f
The minimum opening and maximum opening of the first chaff sheave 16 can be set to a small opening state by engaging with the 4a side, and the opening of the first chaff sheave 16 due to the weight of the processed material on the first chaff sheave 16 can be set. It is possible to make it difficult to perform the degree adjusting operation, and it is possible to more effectively suppress the leakage of the cut straws contained in the processed material on the first chaff sheave 16 from the first chaff sheave 16, so that the sorting accuracy is improved. It is designed so that On the other hand, the more the harvested crop is such that rice is less likely to cause breakage straws during the threshing process and is more wet and less likely to leak from the first chaff sheave 16, the more the operation lever 32 is moved. By engaging one of the one engagement pin 34a to the sixth engagement pin 34f on the side of the sixth engagement pin 34f, the minimum opening degree and the maximum opening degree of the first chaff sheave 16 can be set to a large opening state. At the same time, it is possible to easily perform the operation of adjusting the opening degree of the first chaff sheave 16 depending on the weight of the processed material on the first chaf sheave 16. Since it is possible to promote the leakage of water, it is possible to improve the selection efficiency while suppressing the deterioration of the selection accuracy.

That is, by changing the engagement position of the operating lever 32 according to the type and wetness of the crop to be harvested, the minimum opening degree of the first chaff sheave 16 in consideration of the type and wetness of the crop to be harvested. And the maximum opening degree, and the degree of difficulty of the operation of adjusting the opening degree of the first chaff sheave 16 depending on the weight of the processed material on the first chaff sheave 16 can be set, thereby improving the sorting efficiency and the sorting accuracy. It is designed to work.

As shown in FIGS. 4 and 7, the coil spring 30 is provided with an operating lever 32 via an adjuster 36 made of a bolt screwed into the operating lever 32 so as to be retractable.
By the withdrawal operation of the adjuster 36, the urging force of the coil spring 30 at each minimum opening degree of the first chaff sheave 16 set by the operation lever 32 ( The degree of difficulty in adjusting the opening degree of the chaff sheave 16) can be changed, and the adjustment range of the biasing force of the coil spring 30 at the limit minimum opening degree of the first chaff sheave 16 can be increased. In other words, the state of the first chaff sheave 16 can be set to a state that is more adapted to the type of crop to be harvested and the degree of wetness,
This makes it possible to further improve the sorting accuracy and sorting efficiency.

Incidentally, the operating lever 32 is made of a spring material which elastically returns to a state along the left side wall 24 side of the sheave case 6, and is engaged by elastically deforming the free end side against the returning force. The engagement with the fitting 34 can be released, and the return force can maintain the engagement with the fitting 34. Further, since the engagement with the engagement tool 34 is released by elastic deformation, the engagement hole 32b is formed as a long hole in which the direction along the extending direction of the operation lever 32 becomes longer. The reference numeral 35 shown in FIGS. 4 and 8 is
It is a disengagement prevention member that prevents the long hole 32b of the operation lever 32 from coming off from the pin 31 of the chaflip plate 16A when the operation lever 32 is elastically deformed and the engagement with the engagement tool 34 is released.

Further, in a state where the first chaff sheave 16 has an extending portion 37A extending rearward from the swing fulcrum shaft 33, the pin 31 and the swing fulcrum are provided on the second chaflip plate 16A from the rear. A balance weight 37, which is integrally swingably connected to the shaft 33, is provided. By the action of the balance weight 37, the first chaff sheave 1
It is possible to prevent the first chaff sheave 16 whose opening is adjusted by a light operating force due to a change in the weight of the processed material on the sheave 6 from opening and closing by its own weight when the sheave case 6 is driven to swing.

As shown in FIG. 4, the operating end of the operating lever 32 and the engaging member 34 face the inspection port 27 formed on the front side of the left side wall of the threshing device. From 27, the minimum opening and maximum opening of the first chaff sheave 16 depending on the type of crop to be harvested and the degree of wetness,
Also, the engagement position of the operating lever 32 for setting the biasing force of the coil spring 30 can be easily changed. That is, even when the operation lever 32 for setting the opening degree of the first chaff sheave 16 is operated, the existing inspection port 2
7 can be effectively used, whereby it is possible to save the trouble of newly providing an opening for setting the opening degree of the first chaff sheave 16 on the left side wall of the threshing device, and at the same time, the first chaff sheave 16 The opening degree setting operation can be easily performed from one lateral side of the sheave case 6.

As shown in FIG. 3, the sheave case 6 is a frame-shaped front rough sorting body 6A in which a first Glen pan 15, a second Glen pan 17, and a first Straw rack 18 are integrally formed.
And a rear rough sorting body 6B in which the second chaff sheave 19 and the second stroll rack 20 are integrally formed, a third Glen pan 21 and a Glen sieve 22 are integrally formed, and a front rough sorting body 6A and a rear rough sorting body 6B and a sheave case main body 6C that is formed in a frame shape surrounding the 6B and a resin molded product that can be divided into three parts.
As shown in FIG. 9 and FIG. 9, the first chaff sheave 16 is a part of the lateral side wall 24 of the sheave case 6 and is a front rough sorting body 6.
It is adapted to be attached to the lateral side wall 6a of A. Also,
As shown in FIG. 4, the elongated hole 24c that allows the pin 31 to move in accordance with the opening / closing operation of the first chaff sheave 16 and the engaging tool 34 that engages and holds the operation lever 32 are provided on the lateral side wall 24 of the sheave case 6. It is provided on the left side wall 6c of the sheave case body 6C, which is a part thereof.

[Other Embodiments] Other embodiments of the present invention will be listed below. Biasing means Z
It may be configured by a spiral spring or the like.
Although the adjuster 36 is provided between the biasing means Z and the operation lever 32 in the above embodiment, the adjuster 36 is provided between the biasing means Z and the chaff sheave 16 (specifically, the pin 31 of the chaflip plate 16A). Etc.) may be provided. Without the adjuster 36
The chaff sheave 16 can be operated only by operating the operation lever 32.
The biasing force of the biasing means Z at the limit minimum opening degree may be set and changed . The configuration for setting the opening degree of the chaff sheave 16 can be variously changed. The chaff sheave 16 may be configured such that only the minimum opening can be set or changed, or the opening can not be set. The biasing means Z is connected to the chaf sheave 16 (specifically, the pin 31 of the chaf flip plate 16A).
Etc.) and the sheave case 6 (specifically, the left side wall 24 of the sheave case 6 or the like). In this case, the adjuster 36 is provided with the biasing means Z and the sheave case 6 (specifically, the left side wall 24 of the sheave case 6 or the like).
Or between the urging means Z and the chaff sheave 16 (specifically, the pin 31 of the chaf flip plate 16A or the like). The configuration of the adjuster 36 can be changed in various ways.

[Brief description of drawings]

FIG. 1 Left side view of a vertical section of a threshing device

FIG. 2 is a left side view in vertical section showing the configuration of the sheave case.

FIG. 3 is an exploded perspective view showing the configuration of the sheave case.

FIG. 4 is a left side view of a main part of a sheave case showing an operation structure of a sorting adjustment plate and a chaff sheave.

FIG. 5 (a) Detailed view of essential parts of the sheave case showing a state in which the selection adjusting plate is switched to the upright posture. (B) Detailed view of essential parts of the sheave case showing a state in which the selection adjusting plate is switched to the rearward lying position.

FIG. 6 is a vertical sectional side view of a main part of the sheave case showing a configuration of a sorting adjustment plate.

FIG. 7 is a detailed view of the essential parts of the sheave case showing the opening setting state of the chaff sheave with the operation lever engaged with the fourth engagement pin.

FIG. 8 is a cross-sectional plan view of the essential parts of the sheave case showing the operation structure of the chaff sheave.

FIG. 9 is a vertical sectional front view of a main part of a sheave case showing a structure of a chaff sheave.

FIG. 10 is a perspective view showing the shape of a main part of a cha flip board.

[Explanation of symbols]

6 sheave cases 16 chaff sheaves 16A char flip board 32 Control lever 34 Engagement tool 36 Adjuster P3 Lateral fulcrum Z biasing means

Continuation of the front page (56) Bibliographic data Sho 61-142547 (JP, U) Real development Sho 59-136929 (JP, U) Real development Hei 7-11119 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) A01F 12/32 A01F 12/34

Claims (2)

(57) [Claims] 1. A chaff sheave equipped in a sheave case is connected so as to swing together around a lateral fulcrum set on each upper end of the chaff sheave so that the opening of the chaff sheave can be adjusted, and the chaff sheave. Is provided to elastically bias the closing side of the chaff sheave so that the opening degree of the chaff sheave changes depending on the weight of the processing object acting on the chaff sheave, and the biasing means at the limit minimum opening degree of the chaff sheave. settings can be changed to structure the urging force of the
Form, to open and close operation of the chaff sieve by the bias means
By engaging the operation lever with the operation lever,
And an engaging tool for setting the minimum opening of the sheave, and
Use the engaging lever to move the operating lever to the limit of the chaff sheave.
The chaff is set further than the operating position where the minimum opening is set.
Engagement can be held at the operating position displaced toward the closing side of the sheave
The sheave case structure of the threshing device is configured to be Noh . Wherein between said biasing means chaff sieve, or, between said biasing means and said control lever, according to claim 1, wherein is provided an adjuster for urging force change of the biasing means Sheave case structure of the threshing equipment.