JPH10155346A - Sheave case structure of threshing equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a sheave case structure of a threshing apparatus capable of improving the sorting accuracy while reducing the production cost. SOLUTION: In the sheave case structure of the threshing device,
The group of the chaff flip plates 16A of the chaff sheave 16 mounted on the sheave case 6 is connected to the horizontal support points P set at the respective upper ends.
The opening can be adjusted by swinging and linking around the periphery of the shaft 3 so that the opening can be adjusted, and an urging means Z for elastically urging the chief sheave 16 to the closing side is provided. It was configured to change.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement in which a group of chaff flip plates are swingably connected around a horizontal fulcrum set at each upper end so as to be swingable, and the opening of the chaff sheave can be adjusted in accordance with the amount of material to be processed on the chaff sheave. The present invention relates to a sheave case structure of a configured threshing apparatus.

[0002]

2. Description of the Related Art Conventionally, as a sheave case structure of a threshing apparatus as described above, for example, as disclosed in JP-A-7-227137 and JP-A-7-274684, A sensor for detecting the layer thickness of the chaff sheave as a treatment amount, an electric motor for adjusting the opening of the chaff sheave, and a control device for controlling the operation of the electric motor based on the detection information from the sensor. There has been a configuration in which the opening degree of the chaff sheave can be adjusted in response.

[0003]

However, according to the above-described prior art, it is necessary to provide a sensor, an electric motor, and a control device. Further, in the current electronic control, since the opening of the chaff sheave is adjusted stepwise in accordance with the detection value of the sensor in a preset mode, the opening of the chaff sheave that appears is There is an error with respect to the optimal opening according to the amount of the 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 structure of a threshing apparatus which can improve the sorting accuracy while reducing the manufacturing cost.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, in a sheave case structure of a threshing apparatus, a group of chaff flip plates of a chaff sheave provided in the sheave case is provided. , The opening is adjustable by swingably and interlockingly connected around a lateral fulcrum set at each upper end, and an urging means for elastically urging the chief sheave to the closing side is provided to act on the chief sheave. The opening was configured to change depending on the weight of the processed material.

According to the first aspect of the invention, the larger the weight of the processed material deposited on the chaff sheave and the larger the weight, the larger the degree of opening of the chaff sheave in a state substantially proportional to the weight of the processed material on the chaff sheave. Conversely, the smaller the weight of the processed material deposited on the chaff sheave and the smaller the weight, the more the biasing means elastically biases the opening of the chaff sheave in a state substantially proportional to the processed material amount on the chaff sheave. It can be made smaller. In other words, there is no need to provide a sensor for detecting the layer thickness of the processed material on the chaff sheave as a processed material amount, an electric motor for adjusting the opening of the chaff sheave, and a control device for controlling the operation of the electric motor based on detection information from the sensor. However, instead of these, only the urging means for elastically urging the chaff sheave toward the closing side is provided, so that the opening degree of the chaff sheave can be automatically adjusted according to the amount of the processed material on the chaff sheave. Further, with this configuration, maintenance of the chaff sheave can be performed more easily as compared with a configuration in which a sensor, an electric motor, and a control device are provided. Moreover, by directly adjusting the opening of the chaff sheave by the weight of the processed material on the chaff sheave, the opening of the chaff sheave can be adjusted promptly in a state substantially proportional to the amount of the processed material on the chaff sheave. In comparison with the case where the opening of the chaff sheave is adjusted stepwise in accordance with the detection value of the sensor in a preset mode such as electronic control, the opening of the chaff sheave and the processing on the chaff sheave appear. An error from the optimal opening of the chaff sheave according to the physical quantity can be made very small.

Accordingly, it has been possible to provide a sheave case structure of a threshing apparatus capable of improving the sorting accuracy while simplifying the configuration, reducing the manufacturing cost, and improving the maintainability.

According to the second aspect of the present invention,
In the invention according to claim 1, a pivotal connection portion is formed at both left and right ends of an upper end of the chaflip plate, and an upper end portion other than the pivotal connection portion is recessed so as not to protrude above the lateral fulcrum. Was.

According to the second aspect of the present invention, the upper end portion of the upper end of the chaflip plate other than the pivotal connecting portions at the left and right ends is recessed so as not to protrude above the lateral fulcrum of the chaflip plate. Therefore, when the opening degree of the chaff sheave is increased by the weight of the processed material on the chaff sheave, the resistance of the processed material on the chaff sheave can be suppressed. In other words, compared to the case where the upper end of the chaff flip plate projects above the horizontal fulcrum, the portion projecting above the horizontal fulcrum can be made smaller, whereby the processed material on the chaff sheave can be provided at the upper end. The resistance to the opening operation of the chaff sheave caused by the weight of the chaff sheave can be reduced. Will be able to do it.

Therefore, a sheave case structure of a threshing apparatus which can further improve the sorting accuracy can be provided.

[0011] In the invention according to claim 3 of the present invention,
The invention according to claim 1 or 2, further comprising an operation lever for opening and closing the chaff sheave, and an engagement member for setting a minimum opening of the chaff sheave by engagement with the operation lever.

According to the third aspect of the present invention, by operating the operating lever to a desired operating position and engaging with the engaging tool, the minimum opening of the chaff sheave according to the type of crop to be harvested and the degree of wetness is achieved. You can set the degree. For example, when the type of crop to be harvested is such that rice stems are supple and the straw is not likely to be generated during threshing, such as rice, most of the processed material deposited on the chaff sieve is grains, By setting the minimum opening of the chaff sieve large so that the processed material on the chaff sieve easily leaks from the chaff sieve, it is possible to promote the leakage of grains from the chaff sieve and improve the sorting efficiency Conversely, when the type of crop to be harvested is wheat, such as wheat, which is not supple and easily breaks during threshing, many of the processed materials deposited on the chaff Since the stray straw is included, the minimum opening of the chaff sheave is set to a small value so that the processed material on the chaff sheave does not easily leak from the chaff sheave. , So that thereby improving the can can be selected accuracy suppressing Moshita cutting straw from chaff sieve. Also, for example, if the crop to be harvested is wet and is difficult to leak from the chaff sheave, the minimum opening of the chaff sheave is set large so that the processed material on the chaff sheave easily leaks from the chaff sheave. Thereby, clogging of the processed material in the chaff sieve can be suppressed, and the sorting efficiency can be improved, and conversely, when the crop to be harvested is dry and easily leaks from the chaff sieve, By setting the minimum opening of the chaff sheave to a small value so that the processed material on the chaff sheave does not easily leak from the chaff sheave, it is possible to suppress the leakage of the broken straw contained in the processed material from the chaff sheave and sort the material. The accuracy can be improved.

Therefore, the minimum opening of the chaff sheave can be set in consideration of the type of crop to be harvested, the degree of wetness, etc., whereby the sheave case of the threshing apparatus can improve the sorting efficiency and the sorting accuracy. A structure can be provided.

According to the fourth aspect of the present invention,
In the invention according to claim 3, the operation lever is
It is arranged on the lateral outside of the sheave case and pivotally connected to the pivot point of the chaflip plate so as to be relatively swingable,
A pin protruding outward from the chaff sheave on the side where the operation lever is provided is provided, and the side wall of the sheave case and the operation lever on the side where the operation lever is provided and the operation lever are opened and closed. An arc-shaped long hole allowing the movement of the pin during operation is formed such that the long hole of the operation lever is shorter than the long hole of the lateral side wall, and the minimum opening of the chaff sheave by the engagement tool is performed. The maximum opening degree of the chaff sheave is set in accordance with the degree setting.

According to the fourth aspect of the present invention, when the operating lever is operated to a desired operating position to engage with the engaging member,
The degree of overlap between the long hole of the operation lever and the long hole of the sheave case side wall has been changed, so that the minimum opening and the maximum opening of the chaff sheave can be set according to the type of crop to be harvested and the degree of wetting. Become. In other words, when the minimum opening state (the fully closed state) where the pin of the chaff sheave contacts the front end of the long hole of the sheave case by operating the operation lever is set to the minimum opening degree of the sheave case, The relatively small opening state in which the pin of the chaff sheave comes into contact with the rear end of the long hole of the operation lever which is located in front of the rear end of the operation lever is set as the maximum opening degree of the chaff sheave. Also, when a relatively small opening state in which the pin of the chaff sheave comes into contact with the front end of the long hole of the operation lever which is located slightly behind the front end of the long hole of the sheave case is set as the minimum opening of the chaff sheave. The relatively large opening state in which the pin of the chaff sheave comes into contact with the rear end of the long hole of the operation lever, which is located slightly ahead of the rear end of the long hole of the sheave case, is defined as the maximum opening of the chaff sheave. Will be set. Furthermore, when the relatively large opening state in which the pin of the chaff sheave comes into contact with the front end of the long hole of the operation lever which is located rearward of the front end of the long hole of the sheave case is set as the minimum opening of the chaff sheave. In this case, the maximum opening state (full opening state) where the pin of the chaff sheave contacts the rear end of the long hole of the sheave case is set as the maximum opening degree of the chaff sheave.

[0016] Thus, for example, when the type of crop to be harvested is such as wheat, where straw is likely to occur during threshing, or when the crop to be harvested is dry and easily leaks from the chaff sieve. In order to improve the sorting accuracy by setting the minimum opening of the chaff sheave to the minimum opening state so that the processed material on the chaff sheave hardly leaks from the chaff sheave, the maximum opening of the chaff sheave at that time is improved. Is automatically set to a relatively small opening state, so that the minimum opening of the chaff sheave is set to the minimum opening state, such as when the maximum opening of the chaff sheave is not set. Regardless, since the opening of the chaff sheave reaches the maximum opening state with an increase in the amount of processed material, it is not possible to suppress the leakage of cut straw from the chaff sheave. It becomes possible to prevent the engagement occurs. Conversely, if the type of crop to be harvested is such as rice and the straw is unlikely to break during threshing, or if the crop to be harvested is wet and hard to leak from the chaff sieve, the chaff sieve is used. If the minimum opening of the chaff sheave is set to a relatively large opening state to improve the sorting efficiency so that the above processed material will easily leak from the chaff sheave, the maximum opening of the chaff sheave will also be in the maximum opening state. Is automatically set, the opening of the chaff sheave can be adjusted to the maximum opening state with an increase in the amount of the processed material, and the leakage of the processed material from the chaff sheave can be promoted.

Therefore, it is possible to set the minimum opening of the chaff sheave and the maximum opening of the chaff sheave in consideration of the type of crop to be harvested and the degree of wetness, thereby further improving the sorting efficiency and the sorting accuracy. It is possible to provide a sheave case structure of a threshing device capable of improving the quality.

According to the fifth aspect of the present invention,
In the invention according to the fourth aspect, a spring constituting the urging means is provided on the chaff sheave from the operation lever.

According to the fifth aspect of the present invention, the minimum opening of the chaff sheave is set by operating the operation lever, since the spring constituting the urging means is provided on the chaff sheave from the operation lever for opening and closing the chaff sheave. In this case, since the spring moves in the operation direction together with the operation lever, the biasing force of the spring to the closing side at the minimum opening of the chaff sheave is set regardless of the minimum opening of the chaff sheave. Since the value can be set to a constant value and the rate of change in the opening of the chaff sheave due to the change in the amount of processed material can be made substantially the same, the opening of the chaff sheave can be adjusted in a state substantially proportional to the amount of processed material on the chaff sheave. Become like By the way, when the spring constituting the urging means is erected from the fixed portion such as the sheave case to the chief sheave, as the minimum opening of the chief sheave is set to be larger, the spring is stretched and the closing side at the minimum opening of the chief sheave. Since the spring biasing force is increased and the opening of the chaff sheave is not adjusted with a slight increase in the amount of processed material on the chaff sheave, the opening of the chaff sheave is adjusted in a state substantially proportional to the amount of processed material on the chaff sheave. You will not be able to do it. In other words, according to the fifth aspect of the present invention, the opening of the chaff sheave can be adjusted in accordance with the increase or decrease in the amount of processed material based on the minimum opening of the chaff sheave set in consideration of the type of crop to be harvested, the degree of wetting, and the like. Therefore, it is possible to perform good sorting suitable for the type of crop to be harvested and the degree of wetness.

Accordingly, the minimum opening of the chaff sheave can be set in consideration of the type of crop to be harvested and the degree of wetness, and the type of crop to be harvested can be adjusted by adjusting the opening based on the minimum opening of the chaff sheave. It has been possible to provide a sheave case structure of a threshing apparatus capable of performing good sorting suitable for wetness and wetness.

According to the sixth aspect of the present invention,
In the invention according to claim 3, the operation lever is
It is arranged on the lateral outside of the sheave case and pivotally connected to the pivot point of the chaflip plate so as to be relatively swingable,
A pin protruding outward from the chaff sheave toward the side on which the operation lever is provided is provided, and the pin associated with the opening and closing operation of the chaff sheave is provided on a side wall of the sheave case on the side on which the operation lever is provided. The operation lever is formed of a spring material having an engaging portion which engages with the pin so as to function as the urging means.

According to the sixth aspect of the present invention, as the amount of the processing object deposited on the chaff sheave increases and the weight increases, the operating lever engaged with the pin of the chaff sheave can be elastically deformed by the weight. The degree of opening of the chaff sheave can be increased in a state substantially proportional to the amount of processed material on the chaff sheave, and conversely, as the amount of processed material deposited on the chaff sheave decreases and the weight decreases, the elastic return of the operation lever causes The degree of opening of the chaff sheave can be reduced in a state substantially proportional to the amount of processed material on the chaff sheave. That is, by configuring the operation lever with a spring material, the opening degree of the chaff sheave can be automatically adjusted according to the amount of the processed material on the chaff sheave without separately providing an urging means.

Accordingly, it has become possible to provide a sheave case structure of a threshing apparatus capable of improving the sorting accuracy while further simplifying the configuration and reducing the manufacturing cost.

According to the seventh aspect of the present invention,
In the invention according to any one of claims 3 to 6, the engaging tools are arranged on a lateral wall of the sheave case on a curved line drawn around a swing fulcrum of the chaflip plate. A plurality of engagement pins projecting outward are provided, and the operation lever is elastically returned to the side wall side where an engagement hole for selectively engaging with the engagement pin is formed. Made of spring material.

According to the seventh aspect of the invention, the opening of the chaff sheave is achieved by selectively engaging the engaging hole of the operating lever with a plurality of engaging pins protruding from the lateral side wall of the sheave case. You will be able to make settings. In addition, since the operating lever is made of a spring material that elastically returns to the side wall on which the engaging pin protrudes, the operating lever can be operated without swinging in the projecting direction of the engaging pin. The lever can be engaged and disengaged with the engaging pin by elastically deforming the lever, and the operating lever can be elastically returned by the elastic return of the operating lever without newly providing a mechanism or a member for holding the operating lever in the engaged state. Can be held in the engaged state.

Accordingly, in the sheave case structure of the threshing device capable of setting the opening of the chaff sheave, it is possible to facilitate the operation of setting the opening of the chaff sheave and to simplify the configuration required for setting the opening of the chaff sheave. I got it.

[0027]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a vertical left side view of a threshing device mounted on a combine. The threshing device is a harvesting grain that is pinched and conveyed in a lateral posture by a feed chain 1 provided on the left side thereof. A threshing unit A that performs threshing on the tip side of the culm, a sorting unit B that performs a sorting process on the processed product from the threshing unit A, and a first one of the processed products sorted by the sorting unit B It is constituted by a collection section C for collecting a product and a second product.

The threshing section A includes a handle cylinder 2 that is driven to rotate around a longitudinal axis P1, a receiving net 3 provided below the handling cylinder 2, and a dust outlet formed behind the receiving net 3. And the like. The kernel is separated from the harvested culm which is pinched and conveyed by the feed chain 1, and the single-grained kernels and broken straws are leaked from the receiving net 3. Grains and broken straw that have not leaked are discharged from the dust outlet 4.

The sorting section B includes a sheave case 6 and a sheave case 6 disposed below the receiving net 3 in a state where both sides of the front portion are suspended and supported by a support arm 5 which can swing back and forth (see FIG. 2). The sheave case 6 is oscillated by the operation of a crank mechanism 8 mounted on the rear part thereof, so that the processed material from the threshing unit A is formed. In addition to performing sieving and sorting, Karamin 7 supplies a sifting wind toward the sieve case 6, thereby adding wind sorting to the processed material sieved and sorted by the sieve case 6. Then, by these sorting operations, the processed material from the threshing unit A is divided into a grain as the first thing, a mixture of the grain as the second thing and the straw, and a straw as the third thing. And so on.

The recovery section C is provided below the sheave case 6 behind the Karamin 7 and the first article recovery section 9 below the sheave case 6 and provided behind the first article recovery section 9. It is constituted by a goods collection unit 10 and the like. The first thing collecting part 9 collects the first thing among the processed materials sorted by the sorting part B, and transfers the collected first thing to the first screw disposed at the bottom thereof in the left-right direction. By 11, it is configured to be conveyed toward a lifting screw 12 connected to the right end thereof. Second collection unit 10
Collects the second thing of the processed material sorted and sorted by the sorting unit B, and collects the collected second thing by the second screw 13 arranged left and right at the bottom thereof.
It is configured to be conveyed toward a second reduction screw 14 connected to the right end thereof. The lifting screw 12 lifts the first thing conveyed by the first screw 11 and supplies it from above to a storage unit (not shown) juxtaposed on the right side of the threshing device. It is configured. The second reduction screw 14 is configured to return the second product transported by the second screw 13 to the sheave case 6.

As shown in FIGS. 2 and 3, the sheave case 6 includes a first Glen pan 15 provided at an upper front end of the sheave case 6, and a first chaff sheave provided so as to be connected to a rear end of the first Glen pan 15. (Chaff sheave described in claims) 16, second Glen pan 17, second Glen pan 1 arranged in a state of being connected to the rear end of first chaff sheave 16
7, a first straw rack 18 extending rearward from the upper surface, a second chaff sheave 19 arranged to be connected to a rear end of the second Glen pan 17, and a state connected to a rear end of the second chaff sheave 19. Ta second straw rack 2
0, a third grain pan 21 disposed below the first chaff sheave 16, a Glen sheave 22 disposed in a state of being connected to the rear end of the third Glen pan 21, and the like. The first Glen pan 15 receives the processed material that has leaked from the front side of the receiving net 3 and transports the processed material rearward while sorting by specific gravity. The first chaff sheave 16 coarsely sorts the grains and the like out of the processed material leaked from the rear side of the receiving net 3 and the processed material transferred by the first Glen pan 15 and leaks the remaining processed material. It is designed to be transported backward. First straw rack 18
The sifting means screens and separates grains and the like from the processed material supplied from the dust outlet 4, and transfers the remaining processed material backward. Second Glen Pan 1
Reference numeral 7 is such that the processed material leaking from the first straw rack 18 is transported rearward while being sorted by specific gravity. The second chaff sheave 19 coarsely sorts grains and the like from the processed material transferred by the second Glen pan 17 and the processed material passed through the first straw rack 18 and collects the second product 1
0, and the remaining processed material is transported rearward. Second straw rack 20
Is used to sieve and sort out grains and the like from the processed material transferred by the second chaff sieve 19 and leak them to the second product recovery unit 10, and transfer the remaining processed material rearward to the outside of the machine. It is designed to discharge. Third Glen Pan 21
Is configured to transfer the processed material leaked from the first chaff sheave 16 rearward while sorting by specific gravity difference.
The grain sieve 22 carefully sorts the kernels from the processed material transferred by the third Glen pan 21 and the processed material supplied from the first chaff sieve 16, causes the kernel to leak to the first product recovery unit 9, and removes the remaining processed material. It is designed to be transported backward.

[0033] Behind the Glen sheave 22, an upright posture for guiding the processed material transferred rearward by the Glen sheave 22 to the first object recovery section 9 arranged below the Glen sheave 22, and a rear lower part of the Glen sheave 22 In addition, a sorting adjustment plate 23 capable of switching the posture around a horizontal fulcrum P2 set below the rear of the Glen Sheave 22 is provided in addition to a rearwardly lying posture for guiding to the second object recovery unit 10 provided in the vehicle.
4 to 6, the selection adjustment plate 23 is supported by the left and right side walls 24, which are the side walls of the sheave case 6, so as to be able to swing back and forth around the horizontal fulcrum P 2. At the same time, an operation arm 25 is fixed to the left end side so as to be able to swing integrally. Operation arm 25
The free end has a link pin 25a protruding leftward.
Is equipped. On the left side wall 24 of the sheave case 6,
An arc-shaped long hole 24a is formed around the horizontal fulcrum P2 through which the link pin 25a is inserted, and the left wall 24
Is provided with an engagement pin 24b protruding leftward and outward from the front lateral outer side surface. At the insertion end of the link pin 25a inserted through the long hole 24a, a flat operating rod 26 extending along the lateral outer surface of the left side wall 24 toward the engaging pin 24b located in front of the linking pin 25a is mounted. ing.
A first engagement hole 26 for holding the selection adjustment plate 23 in the upright posture by engaging with the engagement pin 24b is provided at the extension end of the operation rod 26.
a, and a second engagement hole 26b for holding the vehicle in the rearwardly lying posture is provided. That is, as shown in FIG. 5A, the first adjusting hole 26a of the operating rod 26 is engaged with the engaging pin 24b of the sheave case 6 to switch and hold the selection adjusting plate 23 to the upright posture. Thus, the processed material transferred rearward by the Glen Sheave 22 can be guided to the first object recovery unit 9 disposed below the Glen Sheave 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 sorting adjustment plate 23 is switched and held in the rearwardly-downward posture. Can be
The processed material transported rearward by the Glen Sheave 22 can be guided to the second product recovery unit 10 disposed below and below the Glen Sheave 22.

From the above configuration, for example, when the harvested crop is easily broken during threshing, such as wheat, the sorting and adjusting plate 23 provided behind the grain sheave 22 is tilted rearward. By switching to the posture, the Glen Sheave 2 does not leak from the Glen Sheave 22 and
2 can be guided to the second item recovery unit 10 including a large number of broken straws transferred to the rear end of the second item. The second product can be prevented from being collected by the first product collection unit 9 and the second product can be removed from the second product collection unit 10 by the second screw 13.
And the sheave case 6 via the second reduction screw 14
And can be re-sorted into grains and broken straw. That is, when the harvested crop is wheat or the like, the sorting adjustment plate 23 is switched to the rearwardly lying posture to improve the sorting accuracy.

Conversely, for example, when the harvested crop is such as rice and it is difficult to generate straw during threshing, the sorting control plate 2 disposed behind the grain sieve 22 is used.
By switching the posture of Step 3 to the standing posture, it is possible to guide the second material, which is almost all grains transferred to the rear end of the Glen Sheave 22 without leaking from the Glen Sheave 22, to the first object recovery unit 9. Thus, the second material, which is mostly grains, can be transferred from the first material recovery unit 9 to the storage unit via the first screw 11 and the lifting screw 12 without the need for re-sorting in the sieve case 6. It can be supplied. That is, when the crop is rice or the like, the sorting efficiency can be improved by switching the sorting adjustment plate 23 to the upright posture.

As shown by a two-dot chain line in FIGS. 1 and 4, a front side of the left side wall of the threshing device is provided for checking the sorting accuracy of the first thing collected by the first thing collecting section 9. A rectangular inspection port 27 is formed from the side of the front part of the sheave case 6 to the upper side of the first object recovery part 9. The operation port for the engagement pin 24 b of the sheave case 6 is formed from the inspection port 27. 26 first engagement hole 26a or second engagement hole 26
The engagement operation or the disengagement operation of b can be easily performed. That is, by extending the operation rod 26 for operating the selection adjustment plate 23 toward the front, the existing inspection opening 27 can be effectively used when the posture of the selection adjustment plate 23 is switched. This eliminates the need for providing a new opening for operating the selection adjustment plate 23 on the left side wall of the threshing device, and allows the posture switching and holding operation of the selection adjustment plate 23 to be easily performed from one side of the sheave case 6. It has become.

As shown in FIG. 3, FIG. 4, and FIG. 7, the first chaff sheave 16 swings the group of chaff flip plates 16A arranged side by side in the front-rear direction around the lateral fulcrum P3 set at their upper ends. The opening degree can be adjusted by pivotally connecting to the left and right side walls 24 of the sheave case 6 via a connecting member 28 so as to be movable, and by linking their lower ends together by a connecting plate 29. I have. The first chief sheave 16 is elastically urged toward the closing side by an urging means Z including a coil spring 30. From the above configuration, as the amount of the processed material deposited on the first chaff sheave 16 increases and the weight increases, the opening degree of the first chief sheave 16 is increased in proportion to the weight of the processed material on the first chaff sheave 16. On the contrary, the smaller the weight of the processed material deposited on the first chief sheave 16 and the smaller the weight, the more elastically the urging means Z, the larger the amount of the processed material on the first chief sheave 16. In this state, the opening of the first chaff sheave 16 can be reduced. That is, the first chief sheave 16 can be opened and closed, and the urging means Z that elastically urges the first chief sheave 16 to the closing side is provided. The opening can be automatically adjusted. Moreover, by directly adjusting the opening degree of the first chief sheave 16 by the weight of the processed material on the first chief sheave 16, the opening degree adjustment of the first chief sheave 16 is substantially proportional to the amount of the processed material on the first chief sheave 16. First chaff sheave 1 that appears because it can be done promptly in the state
The error between the opening of No. 6 and the optimum opening of the first chief sheave 16 according to the amount of the processed material on the first chief sheave 16 can be made very small. In short, it is possible to improve the sorting accuracy while simplifying the configuration and reducing the manufacturing cost.

As shown in FIGS. 8 to 10, at each of the left and right ends at each upper end of each of the chaff flip plates 16 A, the respective chaff flip plates 16 A are pivotally connected to the left and right side walls 24 of the sheave case 6 via connecting members 28. Pivot connection part 1 for supporting connection
6a is formed, and the upper end portion 16b of each chaflip plate 16A other than the pivotal connection portion 16a is formed so as not to protrude above the lateral support point P3. According to the above configuration, when the opening degree of the first chief sheave 16 is increased by the weight of the processed material on the first chief sieve 16, the processed material on the first chief sieve 16 can be suppressed from becoming a resistance. The opening degree adjustment of the first chaff sheave 16 based on the weight of the processed material can be performed more accurately in a state suitable for the amount of the processed material on the first chaff sheave 16.

As shown in FIGS. 4, 7 and 8, a pin 31 protruding leftward is mounted on the free end of the second chaff flip plate 16A from the rear in the first chaff sheave 16. I have. On the other hand, the left wall 24 of the sheave case 6 is formed with a long hole 24c that allows the movement of the pin 31 in accordance with the opening and closing operation of the first chief sheave 16. The elongated hole 24c is provided in the chaflip plate 16 on which the pin 31 is mounted.
The first chief sheave 16 is in a fully closed state (minimum opening state) in a state in which the pin 31 is in contact with the front end of the first chief sheave 16 in an arc shape centered on the lateral fulcrum P3 which is the swing fulcrum of A, In a state where the pin 31 is in contact with the end, the length is set such that the first chaff sheave 16 is in a fully open state (maximum opening degree state). Left wall 2 of sheave case 6
An operation lever 32 for opening and closing the first chaff sheave 16 is provided on the lateral outer side of 4. Operation lever 3
2 is pivotally connected to a swing fulcrum shaft 33 that supports the second chaff flip plate 16A from the rear in the first chaff sheave 16 so as to be swingable around its axis P3,
A pivoting fulcrum shaft 33 that allows the movement of the pin 31 accompanying the opening and closing operation of the first chief sheave 16 is provided at the pivoting fulcrum side.
An arc-shaped elongated hole 32a centered on the (lateral fulcrum P3) is formed, and the front end of the elongated hole 32a is brought into contact with the pin 31 so as to swing rearward so that the urging means is provided. The opening of the first chief sheave 16 can be increased against the elastic bias of Z, and the opening of the first chief sheave 16 can be opened by the elastic bias of the biasing means Z by swinging forward. The degree can be reduced.

At the lower front part of the long hole 24c in the left side wall 24 of the sheave case 6, it projects outward at a predetermined interval on a curved line drawn about the swing fulcrum shaft 33. An engagement tool 34 constituted by the first engagement pin 34a to the sixth engagement pin 34f is provided. On the other hand, on the free end side of the operation lever 32, an engagement hole 32b which can be engaged with the first engagement pin 34a to the sixth engagement pin 34f alternatively is formed. By engaging any one of the first engagement pin 34a to the sixth engagement pin 34f, the operation lever 32 can be held at the operation position. When the operation lever 32 is held at any operation position, the overlapping state of the long hole 24c of the left side wall 24 of the sheave case 6 and the long hole 32a of the operation lever 32 corresponding to the operation position appears, and the chaff flip plate The movement range of the 16A pin 31 is regulated. That is, the operation lever 32 is moved to the first engagement pins 34a to 34a.
By engaging any one of the sixth engagement pins 34f, the minimum opening degree and the maximum opening degree of the first chief sheave 16 corresponding to the operation position can be set.

As shown in FIGS. 4 and 7, when the operation lever 32 is engaged with the fourth engagement pin 34d, the long hole 32b of the operation lever 32 has the front end and the left side wall 24. The front end of the hole 24c coincides with the pivot fulcrum shaft 33, which is the fulcrum of the operation lever 32, and from the first line L1 connecting the first engagement pin 34a to the pivot fulcrum shaft 33 and the fifth engagement member. In the range over the fifth line L5 connecting the mating pin 34e,
The length is set to allow the pin 31 of the chaflip plate 16A to move, that is, shorter than the long hole 24c of the left side wall 24 of the sheave case 6.

Hereinafter, the operation lever 32 is moved to the first engagement pin 34
The minimum opening degree and the maximum opening degree of the first chaff sheave 16 set when each of the first to sixth engagement pins 34f is engaged will be described in detail.

When the operating lever 32 is engaged with the first engagement pin 32a, the second line L2 connecting the swing fulcrum shaft 33 and the second engagement pin 34b is drawn from the first line L1. The slot 24c of the left side wall 24 is set in a state where the pin 31 of the chaff flip plate 16A is allowed to move within a range extending substantially on the line.
Since the long hole 32b of the operation lever 32 overlaps the first chief sheave 1 in this operation position.
6 can be set to a fully closed state in which the pin 31 of the chaff flip plate 16A contacts the front end of the long hole 24c of the left side wall 24, and the maximum opening of the first chaff sheave 16 is
The pin 31 of the chaflip plate 16A comes into contact with the rear end of the long hole 32b of the operation lever 32, so that the opening degree can be set substantially on the second line L2.

When the operating lever 32 is engaged with the second engagement pin 32b, the third line L3 connecting the swing fulcrum shaft 33 and the third engagement pin 34c from the line of the first line L1. The slot 24c of the left side wall 24 is set in a state where the pin 31 of the chaff flip plate 16A is allowed to move within the range over the line.
Since the long hole 32b of the operation lever 32 overlaps the first chief sheave 1 in this operation position.
6 can be set to a fully closed state in which the pin 31 of the chaff flip plate 16A contacts the front end of the long hole 24c of the left side wall 24, and the maximum opening of the first chaff sheave 16 is
The pin 31 of the chaflip plate 16A comes into contact with the rear end of the long hole 32b of the operation lever 32, so that the opening degree can be set substantially on the third line L3.

When the operating lever 32 is engaged with the third engagement pin 32c, the fourth line L4 connecting the swing fulcrum shaft 33 and the fourth engagement pin 34d is drawn from the first line L1. The slot 24c of the left side wall 24 is set in a state where the pin 31 of the chaff flip plate 16A is allowed to move within a range extending substantially on the line.
Since the long hole 32b of the operation lever 32 overlaps the first chief sheave 1 in this operation position.
6 can be set to a fully closed state in which the pin 31 of the chaff flip plate 16A contacts the front end of the long hole 24c of the left side wall 24, and the maximum opening of the first chaff sheave 16 is
The pin 31 of the chaflip plate 16A comes into contact with the rear end of the long hole 32b of the operation lever 32 so that the opening degree can be set to a position substantially on the fourth line L4.

When the operating lever 32 is engaged with the fourth engaging pin 32d, as described above, the chaflip plate 16A extends from the line of the first line L1 to the line of the fifth line L5. When the pin 31 is allowed to move, the elongate hole 32b of the operation lever 32 overlaps the elongate hole 24c of the left side wall 24. Can be set to a fully closed state in which the pin 31 of the chaff flip plate 16A contacts the front end of the long hole 24c of the left side wall 24, and the maximum opening of the first chaff sheave 16 is controlled by the pin 31 of the chaff flip plate 16A. The lever 32 can be set in an opening state in contact with the rear end of the long hole 32b and positioned on the fifth line L5.

When the operating lever 32 is engaged with the fifth engaging pin 32e, the sixth line L6 connecting the swing fulcrum shaft 33 and the sixth engaging pin 34f from substantially on the second line L2. In the range extending over the approximate line of the left side wall 24 in a state allowing the pin 31 of the chaff flip plate 16A to move.
Since the long hole 32b of the operation lever 32 overlaps with the position c, the minimum opening of the first chief sheave 16 at this operation position is determined by the pin 31 of the chaff flip plate 16A. To the second line L
2 can be set to the degree of opening located on the approximate line,
The maximum opening of the first chaff sheave 16 is
The 6A pin 31 comes into contact with the rear end of the long hole 32b of the operation lever 32 so that the opening degree can be set to be substantially on the sixth line L6.

When the operating lever 32 is engaged with the sixth engaging pin 32f, the rear end of the long hole 32a of the operating lever 32 and the rear end of the long hole 24c of the left side wall 24 coincide with each other. The left side wall 24 extends from approximately on the three lines L3 and beyond the sixth line L6.
The left side wall 24 has a long hole 3c with respect to the long hole 24c of the operation lever 32 in a state where the pin 31 of the chaflip plate 16A is allowed to move within a range in contact with the rear end of the long hole 24c.
Since the 2b overlaps, the minimum opening of the first chaff sheave 16 at this operation position is set to a value substantially equal to the third line L3 when the pin 31 of the chaff flip plate 16A contacts the front end of the long hole 32b of the operation lever 32. The opening degree can be set to a position on the line, and the maximum opening degree of the first chaff sheave 16 can be set to a fully open state in which the pin 31 of the chaff flip plate 16A contacts the rear end of the long hole 24c of the left side wall 24. It has become.

From the above configuration, for example, when the type of crop to be harvested is such as wheat, which is likely to produce broken straws during threshing, or when the crop to be harvested tends to dry out and leaks from the first chaff sieve 16. If it is easy, the operation lever 32 is moved to the first engagement pins 34a to 34a in accordance with those states.
By engaging any one of the third engagement pins 34c, the minimum opening of the first chief sheave 16 can be set to a fully closed state, and the maximum opening of the first chief sheave 16 is set to a relatively small opening state. By this, it is possible to suppress the leakage from the first chaff sheave 16 of the cut straw, which is included in the processed material on the first chaff sheave 16 in a large amount,
As a result, the sorting accuracy can be improved. Conversely, in the case where the type of crop to be harvested is such that rice is unlikely to produce broken straw during threshing, or when the crop to be harvested is slightly wet and hardly leaks from the first chaff sieve 16 Are operating levers 32 according to their state.
Is engaged with any one of the fourth engagement pin 34d to the sixth engagement pin 34f, so that the minimum opening of the first chaff sheave 16 is fully closed, and the pin 31 of the chaff flip plate 16A is A comparatively small opening degree state located on the approximate line,
Alternatively, the pin 31 of the chaff flip plate 16A is
3 and can be set to any of the relatively large opening states located on the approximate line of FIG. 3, and the maximum opening of the first chief sheave 16 can be set to a relatively large opening state. In this way, it is possible to promote the leakage of the grains contained in the processed material of the first chaff sheave 16 from the first chaff sieve 16, thereby improving the sorting efficiency.

In other words, by changing the engagement position of the operating lever 32 according to the type of crop to be harvested and the degree of wetting, the minimum opening degree of the first chaff sheave 16 in consideration of the type of crop to be harvested and the degree of wetting, etc. And the maximum opening can be set, whereby the sorting efficiency and the sorting accuracy can be improved.

The operating lever 32 is made of a spring material which elastically returns along the left side wall 24 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 engagement with the engagement tool 34 can be maintained by the returning force. In addition, since the engagement with the engagement member 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 is elongated. Incidentally, reference numeral 35 shown in FIG. 4 and FIG.
When the operation lever 32 is elastically deformed and disengaged from the engagement member 34, it is a disengagement prevention member for preventing the long hole 32b of the operation lever 32 from disengaging from the pin 31 of the chaflip plate 16A.

As shown in FIGS. 4 and 7, the urging means Z
The coil spring 30 is constructed from the operation lever 32 to the pin 31 of the chaflip plate 16A.
Thereby, when setting the minimum opening degree and the maximum opening degree of the first chaff sheave 16, the operation lever 32 is moved to the fourth engagement pin 34.
d to the sixth engagement pin 34f, the coil spring 30 moves in the operation direction together with the operation lever 32, so that the first chief sheave 16 closes at the minimum opening degree. 1st chief sheave 1 with a change in the amount of material to be processed.
6, the change rate of the opening degree can be made substantially the same, so that the opening degree of the first chief sheave 16 can be adjusted in a state substantially proportional to the amount of the processed material on the first chief sheave 16.
When setting the minimum opening and the maximum opening of the first chaff sheave 16, when the operation lever 32 is engaged with any of the first engagement pin 34a to the third engagement pin 34c, the operation As the lever 32 is operated toward the first engagement pin 34a,
Since the coil spring 30 is extended and the spring biasing force to the closing side at the minimum opening degree of the first chief sheave 16 is increased, the value of the processing amount at which the opening operation of the first chief sheave 16 is started is increased. Thus, the opening operation of the first chaff sheave 16 can be made difficult to perform, and the opening adjustment after the opening operation of the first chaff sheave 16 is performed is substantially proportional to the amount of the processed material on the first chaff sheave 16. It can be done in a state.

In short, based on the minimum opening of the first chaff sheave 16 set in consideration of the type of crop to be harvested, the degree of wetting, etc., the opening of the first chaff sheave 16 in accordance with the increase or decrease in the amount of the processed material is adjusted. This can be performed in a state that is substantially proportional to the amount of the processed material on one chaff sieve 16, so that good sorting suitable for the type of crop to be harvested and the degree of wetness can be performed.

As shown in FIG. 7, the coil spring 30 is provided with an adjusting screw 3 screwed to the operating lever 32 so as to be retractable.
6 and connected to the operation lever 32, and the adjusting force of the adjusting screw 36 can adjust the urging force of the coil spring 30 that elastically urges the first chief sheave 16 to the closing side.

Further, the first chaff sheave 16 has an extending portion 37A extending rearward from the pivot shaft 33, and the pin 31 and the pivot shaft are attached to the second chaff flip plate 16A from the rear. The balance weight 37 is provided so as to be integrally swingable via a shaft 33, and the first chaff sheave 1 is driven by the action of the balance weight 37.
When the sheave case 6 is driven to swing, the first chaff sheave 16 whose opening degree is adjusted by a small operation force due to a change in the weight of the processed material on the sheave case 6 can be prevented from opening and closing by its own weight.

As shown in FIG. 4, the operating end of the operating lever 32 and the engaging member 34 face an inspection port 27 formed on the front side of the left side wall of the threshing device. 27, it is possible to easily change the engagement position of the operation lever 32 for setting the minimum opening and the maximum opening of the first chaff sheave 16 according to the type of crop to be harvested, the degree of wetness, and the like. I have. In other words, the existing inspection port 27 can be effectively used even when the operation lever 32 for setting the opening of the first chaff sheave 16 is operated, whereby a new left-side wall of the threshing device is newly provided. The labor for providing an opening for setting the opening of the first chaff sheave 16 can be omitted, and the first chaff sheave 1
The opening degree setting operation of the sheave case 6 can be easily performed from one side of the sheave case 6.

As shown in FIG. 3, the sheave case 6 is composed of a frame-shaped front roughly sorted body 6A in which a first grain pan 15, a second grain pan 17, and a first straw rack 18 are integrally formed.
, A rear rough sorting body 6B in which the second chaff sheave 19 and the second straw rack 20 are integrally formed, and a front coarse sorting body 6A and a rear coarse sorting body in which the third Glen pan 21 and the Glen sheave 22 are integrally formed. 6B and a sheave case main body 6C formed in a frame shape surrounding the resin case 6B.
As shown in FIG. 9 and FIG. 9, the first chaff sheave 16 is a part of the front rough sorter 6 that is a part of the side wall 24 of the sheave case 6.
A is attached to the lateral side wall 6a of A. Also,
As shown in FIG. 4, a long hole 24 c that allows the movement of the pin 31 in accordance with the opening / closing operation of the first chief sheave 16, and a minimum opening degree and a maximum opening degree of the first chief sheave 16 by engagement with the operation lever 32. Is set on the sheave case body 6C, which is a part of the side wall 24 of the sheave case 6.
On the left side wall 6c.

[Other Embodiments] Other embodiments of the present invention will be listed below. The configuration for setting the opening of the chaff sheave 16 can be variously changed. The chaff sheave 16 may be configured such that the opening cannot be set, or may be configured such that only the minimum opening can be set. As the chaff sheave 16, each chaff flip plate 16
The upper end portion 16b other than the pivotal connection portion 16a in A may not be formed to be recessed. The coil spring 30 constituting the urging means Z may be provided on the left side wall 24 of the sheave case 6 from the operation lever 32. As shown in FIG. 11, the operation lever 32 is
It may be constituted by a rod-shaped spring material provided with an engaging portion 32c that engages with the spring, and also functions as the urging means Z that elastically urges the chief sheave 16 toward the closing side.

[Brief description of the drawings]

FIG. 1 is a longitudinal left side view of a threshing apparatus.

FIG. 2 is a longitudinal left side view showing a configuration of a sheave case.

FIG. 3 is an exploded perspective view showing a configuration of a 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.

5A is a detailed view of a main part of the sheave case showing a state in which the sorting adjustment plate is switched to the standing posture; and FIG. 5B is a detailed view of a main part of the sheave case showing a state in which the selection adjustment plate is switched to the rearwardly lying posture.

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

FIG. 7 is a detailed view of a main part of a sheave case showing an opening degree setting state of a chaff sheave in which an operation lever is engaged with a fourth engagement pin.

FIG. 8 is a cross-sectional plan view of a main part of a sheave case showing an operation structure of a chaff sheave.

FIG. 9 is a longitudinal sectional front view of a main part of a sheave case showing a configuration of a chaff sheave.

FIG. 10 is a perspective view showing a shape of a main part of the chaflip plate.

FIG. 11 is a left side view of a main portion of a sheave case showing a configuration of an operation lever according to another embodiment.

[Explanation of symbols]

 6 Sheave case 16 Chaf sheave 16A Chaflip plate 16a Pivot connection part 16b Upper end portion (recessed part) other than pivot support part 24 Side wall 24c Long hole 30 Spring 31 Pin 32 Operation lever 32a Long hole 32c Engagement part 32b Engagement Hole 33 Swing fulcrum shaft 34 Engagement tool 34a First engagement pin 34b Second engagement pin 34c Third engagement pin 34d Fourth engagement pin 34e Fifth engagement pin 34f Sixth engagement pin P3 Lateral fulcrum ( Oscillating fulcrum) Z biasing means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshiyuki Kono 64 Ishizukita-cho, Sakai-shi, Osaka Inside Kubota Sakai Works

Claims (7)

[Claims] 1. A group of chaff flip plates of a chaff sheave provided in a sheave case, the opening of which can be adjusted by swingably and interlockingly linked around a horizontal fulcrum set at each upper end, and the chaff sheave is closed. A sheave case structure for a threshing apparatus, wherein a biasing means for biasing elastically is provided on a side of the threshing device so that an opening degree is changed depending on a weight of a processed material acting on the chaff sheave. 2. A pivot connection portion is formed at both left and right ends of an upper end of the chaff flip plate, and an upper end portion other than the pivot connection portion is recessed so as not to protrude above the lateral fulcrum. 2. A sheave case structure of the threshing apparatus according to 1. 3. An operation lever for opening and closing the chaff sheave, and an engagement member for setting a minimum opening of the chaff sheave by engagement with the operation lever.
Or the sheave case structure of the threshing apparatus according to 2. 4. The operation lever is disposed laterally outside of the sheave case, and is pivotally connected to the pivot shaft of the chaff flip plate so as to be pivotable relative to the operation lever. The operation lever is disposed from the chaff sheave. A pin protruding outwardly from the side, and allowing the lateral wall of the sheave case and the operation lever on the side where the operation lever is provided and the operation lever to move the pin in accordance with the opening and closing operation of the chaff sheave. An arc-shaped long hole is formed such that the long hole of the operation lever is shorter than the long hole of the lateral side wall, and with the minimum opening setting of the chaff sheave by the engagement tool,
The sheave case structure of the threshing apparatus according to claim 3, wherein a maximum opening of the chaff sheave is set. 5. A sheave case structure for a threshing apparatus according to claim 4, wherein a spring constituting said urging means is provided on said chief sheave from said operation lever. 6. The operating lever is disposed laterally outside of the sheave case and is pivotally connected to a pivot shaft of the chaff flip plate so as to be swingable relative to each other. The operating lever is provided from the chaff sheave. A pin protruding outward from the side of the sheave case, and an arc-shaped long hole on the side wall of the sheave case on which the operation lever is provided to allow movement of the pin in accordance with the opening and closing operation of the chaff sheave. 4. The sheave case structure for a threshing apparatus according to claim 3, wherein the operating lever is formed of a spring material having an engaging portion that engages with the pin so as to function as the urging means. 7. A plurality of engaging members projecting outward from the sheave case in such a manner that the engaging members are arranged on a lateral side wall of the sheave case along a curved line drawn around a swing fulcrum of the chaflip plate. 7. The operation lever according to claim 3, wherein the operating lever is formed of a spring material that elastically returns to the side wall having an engagement hole that is selectively engaged with the engagement pin. The sheave case structure of the threshing apparatus according to any one of the above.