JPH1175512A - Sheave case structure of threshing equipment - Google Patents

Abstract

(57) [Summary] [Problem] A sheave case of a threshing device that can automatically adjust the opening of a chaff sheave according to the amount of processed material on a chaff sheave and improve the sorting accuracy while reducing manufacturing costs. Provide structure. SOLUTION: In the sheave case structure of the threshing device,
The horizontal support points P3 set at the upper ends of the chaff flip plates 16A of the chaff sheave 16 mounted on the sheave case 6.
Around the periphery of the chaff sheave 16
Is configured so that the opening degree can be adjusted, and the opening degree changes according to the amount of the processed material on the chaff sheave 16,
An urging spring 30 for elastically urging the chief sheave 16 to the closing side is provided, and the elastic urging force of the urging spring 30 is changed by changing the hooking position of the urging spring 30.

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 connected so as to be interlockingly swingable around a horizontal fulcrum set at each upper end, and the degree of opening of the chaff sheave can be adjusted according to the amount of processed material 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 driving 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. In some cases, the opening degree of the chaff sheave can be adjusted.

[0003]

However, according to the above-mentioned prior art, it is necessary to provide a sensor, an electric motor, and a control device. In the current electronic control,
Since the opening of the chaff sheave is adjusted in a stepwise manner in accordance with the detection value of the sensor in a preset mode, the opening of the chaff sheave that appears appears in accordance with the amount of processed material on the chaff sheave. There is an error with respect to the optimal opening, 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 apparatus capable of automatically adjusting the degree of opening of a chaff sheave in accordance with the amount of material to be processed on a chaff sheave and improving the sorting accuracy while reducing manufacturing costs. It is to provide a structure.

[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 chaff sheaves are connected so as to be swingable around a horizontal fulcrum set at each upper end so that the opening degree of the chaff sheave can be adjusted, and the opening degree changes according to the amount of processed material on the chaff sheave. An urging spring for elastically urging the chaff sheave toward the closing side is provided, and the elastic urging force of the urging spring is changed by changing the hooking position of the urging spring.

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 chaff sheave increases, the weight of the processed material increases the elastic bias of the biasing spring. In contrast, 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 of the processed material acting on the chaff sheave decreases. , By the elastic bias of the biasing spring,
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. 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 the detection information from the sensor. However, instead of such a configuration, only the urging spring for elastically urging the chaff sheave toward the closing side is provided, and the opening degree of the chaff sheave can be automatically adjusted according to the amount of the processed material on the chaff sheave. In addition, with this configuration, maintenance of the chaff sheave can be easily performed as compared with the configuration in which the sensor, the electric motor, and the control device are provided.

Further, by directly adjusting the opening degree of the chaff sheave by the weight of the processed material on the chaff sheave,
The opening degree of the chaff sheave can be adjusted promptly in a state that is approximately proportional to the amount of material to be processed on the chaff sheave, so that it can be stepped in accordance with the detection value of the sensor in a preset mode like current electronic control. As compared with the case where the opening of the chaff sheave is adjusted, the error between the appearing opening of the chaff sheave and the optimum opening of the chaff sheave in accordance with the amount of material to be processed on the chaff sheave can be minimized. become.

In addition, by changing the elastic biasing force of the biasing spring by changing the hooking position of the biasing spring, the value of the weight of the workpiece at which the opening operation of the chaff sheave is started, in other words, the workpiece on the chaff sheave The difficulty of the operation of adjusting the opening of the chaff sheave by the weight of the can be changed according to the type of crop to be harvested, the degree of wetting, and the like. 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 changing the hooking position of the biasing spring so that the elastic biasing force of the biasing spring is weakened, it is easy to adjust the opening of the chaff sheave by the weight of the processed material on the chaff sheave, thereby suppressing a decrease in sorting accuracy. However, the leakage of grains from the chaff sheave can be promoted, and the sorting efficiency can be improved. Conversely, when the type of crop to be harvested is wheat, such as wheat, which is not supple and easily breaks during threshing, the processed material deposited on the chaff sheave contains many broken straws. By changing the hooking position of the urging spring so that the elastic urging force of the urging spring becomes stronger, it becomes difficult to adjust the opening of the chaff sheave by the weight of the processed material on the chaff sheave. Therefore, it is possible to suppress the leakage of the cutting straw from the chaff sheave, thereby improving the sorting accuracy. Further, for example, when the crop to be harvested is slightly wet and hard to leak from the chaff sheave, the hooking position of the urging spring is changed so that the elastic urging force of the urging spring is weakened, and By facilitating the opening adjustment operation of the chaff sheave based on the weight of the processed material, the processed material on the chaff sheave can be easily leaked from the chaff sheave, and the clogging of the processed material in the chaff sheave can be suppressed. The sorting efficiency can be improved. Conversely, when the crop to be harvested is dry and easily leaks from the chaff sheave, the hooking position of the urging spring is changed so that the elastic urging force of the urging spring is increased, and the processing on the chaff sheave is performed. By making it difficult to adjust the opening of the chaff sheave based on the weight of the material, it is possible to make it difficult for the processed material on the chaff sheave to leak from the chaff sheave, and to suppress the leakage of broken straw included in the processed material from the chaff sheave. , The sorting accuracy can be improved.

[Effect] Therefore, only by providing an urging spring for elastically urging the chief sheave configured to be able to adjust the opening degree to the closing side, it is possible to automatically adjust the opening degree of the chief sheave in accordance with the amount of the processed material on the chief sheave. Can be done
Just by configuring the hooking position of the biasing spring to be changeable,
Since the opening of the chaff sheave can be adjusted in consideration of the type of crop to be harvested and the degree of wetting, the sorting accuracy and sorting efficiency are improved while simplifying the configuration, reducing manufacturing costs, and improving maintainability. And a sheave case structure of the threshing apparatus capable of effectively achieving the above.

According to the second aspect of the present invention,
In the first aspect of the present invention, the end of the urging spring is supported by a support piece formed such that the distance in the non-hook direction is greater than the distance in the hook direction from the urging spring.

According to the second aspect of the present invention, when the end of the biasing spring is hooked on the supporting piece and supported, the supporting piece has a non-hanging direction longer than the distance in the hooking direction with the biasing spring. Is large, the hooking posture of the biasing spring with respect to the support piece is regulated, and the hooking posture of the biasing spring with respect to the support piece changes due to the swinging movement of the sheave case. A change in the tension of the spring can be prevented, and a change in the elastic urging force of the urging spring due to the change can be prevented. In other words, by making a simple improvement to the shape of the support piece, the chaff sheave can be urged to the closing side with a stable elastic urging force regardless of the swinging movement of the sheave case, etc. The opening degree of the chaff sheave can be stably adjusted.

[Effect] Therefore, the opening degree adjustment of the chaff sheave, which can improve the sorting accuracy and the sorting efficiency,
It has become possible to provide a sheave case structure of a threshing device which can be stably performed without complicating the configuration.

[0013]

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 horizontal position 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 the second product.

The threshing unit A includes a handle drum 2 that is driven to rotate around a longitudinal axis P1, a receiving net 3 provided below the handling drum 2, and a dust outlet 4 formed behind the receiving net 3. , Etc., and separates grains from the harvested grain culm held and conveyed by the feed chain 1 to make the grains and cut straws, etc., which are made into a single grain, leak from the receiving net 3 to the sorting section B, The grains and broken straw that did not leak from the receiving net 3
To the sorting section B.

The sorting portion B includes 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 attached to the rear of the sheave case 6 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 collecting section C includes a first-item collecting section 9 disposed below the front of the sheave case 6, a second-item collecting section 10 disposed below the rear of the sheave case 6, 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. The second product recovery unit 10 recovers a second product among the processed products sorted and processed by the separation unit B, and transfers the collected second product to a second screw disposed on the bottom thereof in a left-right direction. By 13, 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 front part of 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 17 arranged in a state of being connected to the rear end of first chaff sheave 16
The first straw rack 18 extending rearward from the upper surface of the first, the second chaff sheave 19 arranged to be connected to the rear end of the second Glen pan 17, and the second straw cuff 19 are arranged to be connected to the rear end of the second chaff sheave 19. Second straw rack 20,
It comprises 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. 1st chaff sieve 16
The remaining processed material is directed rearward while coarsely sorting and leaking grains and the like from the processed material leaked from the rear side of the receiving net 3 and the processed material transferred by the first Glen pan 15. It is designed to be transported. The first straw rack 18
Grains and the like are sieved and sorted out of the processed material discharged from the dust outlet 4, and the remaining processed material is transported backward. Second Glen Bread 17
Is configured to transfer the processed material that has leaked from the first straw rack 18 rearward while sorting 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 via the first straw rack 18 and allows the coarse particles to leak to the second product recovery unit 10, The remaining processed material is transported rearward. The second straw rack 20 sieves and sorts out grains and the like from the processed material transferred by the second chaff sieve 19 and leaks them to the second product recovery unit 10, and transfers the remaining processed material backward. And discharge it outside the machine. The third Glen pan 21 is configured to transfer the processed material leaked from the first chaff sheave 16 rearward while sorting by specific gravity. 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.

Behind the Glen Sheave 22, the processed material transported rearward by the Glen Sheave 22 is guided to the first object recovery section 9 disposed below the Glen Sheave 22, and the rear lower part of the Glen Sheave 22 is guided downward. 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, by engaging the first engaging hole 26a of the operating rod 26 with the engaging pin 24b of the sheave case 6, the sorting adjusting plate 23 is set in the upright posture. The workpiece can be switched and held, and the processed material transported rearward by the Glen Sheave 22 can be guided to the first object recovery section 9 disposed below the Glen Sheave 22. Also, as shown in FIG. 5B, the second adjusting hole 26b of the operating rod 26 is engaged with the engaging pin 24b of the sheave case 6, thereby switching and holding the sorting adjustment plate 23 to the rearwardly-downward posture. The processed material transported rearward by the Glen Sheave 22 can be guided to the second product recovery unit 10 disposed below and behind the Glen Sheave 22.

With the above configuration, for example, when the harvested crop is one that is liable to produce broken straws during threshing, like wheat, the posture of the sorting adjustment plate 23 provided behind the grain sheave 22 is changed to the rearward posture. 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 it can be reduced to 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 one that is unlikely to produce broken straw during threshing, such as rice,
By switching the posture of the sorting adjustment plate 23 disposed behind the grain sheave 22 to the upright posture, the second product, which is almost all grains transferred to the rear end of the grain sheave 22 without leaking from the grain sheave 22 Can be guided to the first object recovery unit 9, whereby the second material, which is mostly grain, can be guided from the first object recovery unit 9 to the first screw 11 without trouble of re-sorting in the sheave case 6. And it can be supplied to the storage unit via the lifting screw 12. 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. The first engagement hole 26a or the second engagement hole 26b can be easily engaged or disengaged. That is, the operating rod 26 for operating the selection adjusting plate 23
Of the sorting adjustment plate 23 by extending the
The existing inspection port 27 can be effectively used when the operation of switching the posture of the threshing device is performed, thereby saving the trouble of providing a new opening for operating the selection adjustment plate 23 on the left side wall of the threshing device. The operation of switching and holding the posture of the selection adjustment plate 23 can be easily performed from one side of the sheave case 6.

As shown in FIG. 3, FIG. 4 and FIGS. 7 to 9, the first chaff sheave 16 is provided with a group of chaff flip plates 16A arranged side by side in the front-rear direction around a lateral fulcrum P3 set at each upper end thereof. So that the connecting member 2
The opening degree can be adjusted by pivotally connecting the lower ends of the sheave case 6 with the left and right side walls 24 via the connecting plate 8 and connecting the lower ends of the sheave case 6 by a connecting plate 29. Further, the first chaff sheave 16 is elastically urged toward the closing side by an urging spring 30. According to the above configuration, as the amount of the processed material deposited on the first chaff sheave 16 increases and the weight of the processed material acting on the first chief sheave 16 increases, the weight is approximately proportional to the amount of the processed material on the first chief sieve 16. Can increase the degree of opening of the first chief sheave 16, and conversely, the amount of material deposited on the first chief sheave 16 decreases, and
6, the smaller the weight of the processed material acting on the urging spring 30,
, The opening degree of the first chaff sheave 16 can be reduced in a state substantially proportional to the amount of processed material on the first chaff sheave 16.

That is, the first chief sheave 16 is configured to be openable and closable, and only the urging spring 30 for elastically urging the first chief sheave 16 to the closing side is provided. One chaff sieve 16
The opening can be automatically adjusted. Moreover, by directly adjusting the opening degree of the first chaff sheave 16 by the weight of the processed material on the first chaff sheave 16,
Adjusting the opening of the first chaff sheave 16
6 can be performed promptly in a state substantially proportional to the amount of processed material on the first chief sheave 16 and the optimum opening of the first chief sheave 16 according to the amount of processed material on the first chief sheave 16 that appears. Error can be made very small. In short, while the structure is simplified and the manufacturing cost is reduced, the opening degree of the first chief sieve 16 can be automatically adjusted appropriately according to the amount of the processed material on the first chief sieve 16, so that the sorting accuracy and the sorting can be improved. The efficiency can be improved.

As shown in FIGS. 8 to 10, at each of the left and right end portions of 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 FIG. 4, FIG. 7 and FIG. 8, the free end of the second chaff flip plate 16A from the rear in the first chaff sheave 16 has a pin 3 projecting leftward and outward.
1 is attached. On the other hand, the left side wall 2 of the sheave case 6
4 includes pins 3 associated with opening and closing operations of the first chaff sheave 16.
A long hole 24c that allows the movement of one is formed. The elongated hole 24c is provided in the chaflip plate 16A on which the pin 31 is mounted.
When the pin 31 contacts the front end of the first chief sheave 16, the first chief sheave 16 is in a minimum minimum opening degree state (substantially fully closed state). In the state where the pin 31 contacts the rear end, the movement of the pin 31 accompanying the opening / closing operation of the first chief sheave 16 is regulated so that the first chief sheave 16 is in the limit maximum opening state (full open state). I have. An operation lever 32 for opening and closing the first chief sheave 16 is provided on the lateral outer side of the left side wall 24 of the sheave case 6. The operation lever 32 is pivotally connected to a swing fulcrum shaft 33 that supports the second rearmost flip flop plate 16A of the first chaff sheave 16, and is swingably supported around its axis P3. In the side portion, an arc-shaped long hole 3 centered on the swing fulcrum shaft 33 (lateral fulcrum P3) is provided.
2a is formed. Then, the support piece 32A bent outwardly at a position above the long hole 32a of the operation lever 32 and the pin 31 attached to the free end of the second rear flip-flop plate 16A, The urging spring 3 for elastically urging the first chaff sheave 16 to the closing side.
0 is multiplied. That is, the operation lever 32 allows the movement of the pin 31 in accordance with the opening and closing operation of the first chief sheave 16, and swings around the axis P <b> 3, thereby causing the first chief sheave 16 to move through the urging spring 30.
Is opened and closed. By operating the operating lever 32 backward, the opening of the first chief sheave 16 can be increased. By operating the operating lever 32 forward, the first chief sheave 16 can be moved. Can be made smaller.

As shown in FIGS. 4 and 7, the left side wall 24 of the sheave case 6 is located at the front lower part of the long hole 24c.
An engagement constituted by a first engagement pin 34a to a sixth engagement pin 34f projecting outward in a state of being arranged at predetermined intervals on a curved line drawn about the swing fulcrum shaft 33. A tool 34 is provided. On the other hand, the first engaging pin 34a to the sixth engaging pin 34f
Is formed with an engagement hole 32b which can be engaged alternatively.
By engaging the engagement hole 32b with 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 3
2 is engaged with any one of the first engagement pin 34a to the sixth engagement pin 34f, so that the minimum opening degree and the maximum opening degree of the first chaff sheave 16 are changed according to the type of crop to be harvested, the degree of wetting, and the like. The settings can be changed accordingly.

When the operating lever 32 is engaged with the fourth engaging pin 34d of the engaging member 34, the operating lever 32 has its long hole 32b.
And the front end of the long hole 24c of the left side wall 24 coincides with the front end of the left side wall 24, and swings from the first line L1 connecting the swing fulcrum shaft 33 which is the swing fulcrum of the operation lever 32 and the first engagement pin 34a. The slot 32b of the chaflip plate 16A is allowed to move within a range extending over a fifth line L5 connecting the pivot point shaft 33 and the fifth engagement pin 34e.
The length and the mounting posture are set. Thus, when the minimum opening and the maximum opening of the first chaff sheave 16 are changed, the operation lever 32 is moved to the first engagement pin 3.
4a to the third engagement pin 34c, the more the operating lever 32 is operated toward the first engagement pin 34a, the more the urging spring 30 is extended and the first chief sheave 16
The biasing force to the closing side at the minimum opening degree is increased. That is, the operating lever 32 is
At the operation position displaced further toward the closing side of the first chief sheave 16 than the position of the fourth engagement pin 34d, which is the operation position at which the limit minimum opening of the first chief sheave 16 is set. Engagement pin 34a to third engagement pin 34
When the operating lever 32 is engaged with any of the first engagement pin 34a to the third engagement pin 34c, the urging spring 30 at the limit minimum opening of the first chief sheave 16 is provided. The urging force can be set and changed, and the opening adjustment operation of the first chief sheave 16 based on the value of the weight of the processed material at which the opening operation of the first chief sheave 16 is started, in other words, the weight of the processed material on the first chief sheave 16 Can be changed according to the type of crop to be harvested and the degree of wetness.

When the minimum opening and the maximum opening of the first chaff sheave 16 are changed, the operation lever 32 is engaged with any one of the fourth engagement pin 34d to the sixth engagement pin 34f. Since the biasing spring 30 moves in the operating direction together with the operation lever 32, the biasing force of the biasing spring 30 at the minimum opening of each first chaff sheave 16 is set to the same value. Has become. That is, in the range from the fourth engagement pin 34d to the sixth engagement pin 34f, the value of the processed material weight at which the opening operation of the first chief sheave 16 is started, that is, the weight of the processed material on the first chief sheave 16 The minimum opening and the 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 difficulty of the opening adjustment operation of the first chaff sheave 16. I have.

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 and the urging force of the urging spring 30 which are set when each of the first to sixth engaging pins 34f are engaged will be described in detail.

When the operating lever 32 is engaged with the first engaging pin 34a, the operating lever 32 is moved to the fourth engaging pin 34d which is the operating position where the minimum opening of the first chief sheave 16 is set. And the first chief sheave 16 is engaged and held at the operation position displaced in the closing side direction of the first chief sheave 16, so that the urging force of the urging spring 30 can be further increased, and The operation of adjusting the opening of the first chaff sheave 16 by the weight of the above processed material can be set to be more difficult, and the swing fulcrum shaft 33 and the second engagement pin 34b can be set from the line of the first line L1. In a state where the pin 31 of the chaff flip plate 16A is allowed to move within a range extending substantially on the second line L2 connecting
Since the long hole 32b of the operation lever 32 overlaps the long hole 24c of the left side wall 24, the minimum opening of the first chief sheave 16 at this operation position is determined by the pin 31 of the chaflip plate 16A. Can be set to a limit minimum opening state (substantially fully closed state) in contact with the front end of the long hole 24c. 32
The small opening state can be set in contact with the rear end of "b" and substantially on the second line L2.

When the operation lever 32 is engaged with the second engagement pin 34b, the operation lever 32 is moved to the fourth engagement pin 34d which is the operation position where the minimum opening of the first chief sheave 16 is set. 1st chaff sieve 1 larger than
6 is engaged and held at the operation position displaced in the closing side direction, the urging force of the urging spring 30 can be increased, and the first chief sheave due to the weight of the processed material on the first chief sheave 16 can be obtained. It is possible to set a state in which the opening degree adjustment operation of Step 16 is difficult to perform, and extends from the line of the first line L1 to substantially the line of the third line L3 connecting the swing fulcrum shaft 33 and the third engagement pin 34c. Within the range, the long hole 32b of the operation lever 32 overlaps the long hole 24c of the left side wall 24 in a state where the pin 31 of the chaflip plate 16A is allowed to move. The minimum opening of one chaff sheave 16 can be set to a limit minimum opening state (substantially 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 first chief sheave 1 The maximum opening of tea flip plate 16
The A 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 a relatively small opening position substantially on the third line L3.

When the operating lever 32 is engaged with the third engaging pin 34c, the operating lever 32 is moved to the fourth engaging pin 34d, which is the operating position where the minimum opening of the first chief sheave 16 is set. 1st chaff sieve 16 slightly
Is engaged and held at the operation position displaced in the closing side of the first chaff sheave 16, the urging force of the urging spring 30 can be slightly increased, and 16 can be set to a state in which it is slightly difficult to perform the opening adjustment operation, and is substantially on the fourth line L4 connecting the swing fulcrum shaft 33 and the fourth engagement pin 34d from the line of the first line L1. The flip plate 16
In the state where the pin 31 of A is allowed to move, the long hole 32b of the operation lever 32 is positioned against the long hole 24c of the left side wall 24.
Are overlapped, the minimum opening of the first chaff sheave 16 at this operation position is
A pin 31 can be set to a limit minimum opening state (substantially fully closed state) in which the pin 31 contacts the front end of the long hole 24c of the left side wall 24, and the maximum opening degree of the first chief sheave 16 is set to the pin of the chaflip plate 16A. The standard lever 31 can be set to a standard opening degree position substantially on the fourth line L4 by contacting the rear end of the long hole 32b of the operation lever 32.

When the operation lever 32 is engaged with the fourth engagement pin 34d, the operation lever 32 is
Since the engagement is held at 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, the urging force of the urging spring 30 is set to its original size. Thus, it is possible to set a state in which the opening degree adjustment operation of the first chief sheave 16 can be normally performed by the weight of the processed material on the first chief sheave 16, and the fifth line from the line of the first line L1. The long hole 32b of the operation lever 32 overlaps the long hole 24c of the left side wall 24 in a state where the pin 31 of the chaflip plate 16A is allowed to move within the range extending along the line L5. The minimum opening of the first chaff sheave 16 in this operation position is determined by the pin 31 of the chaff flip plate 16A.
c can be set to a limit minimum opening state (substantially fully closed state) in contact with the front end of the first cuff sheave 16, and the pin 31 of the chaff flip plate 16 A is controlled by the operating lever 32
And a relatively large opening state located on the fifth line L5 in contact with the rear end of the long hole 32b.

When the operating lever 32 is engaged with the fifth engaging pin 34e, 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 chief sheave 16 is set. Is held at the operation position displaced in the opening side direction of the first chaff sheave 16 from the position of the first chaff sheave 16, the urging force of the urging spring 30 can be maintained at the original size, and the first force can be maintained. The opening adjustment operation of the first chaff sheave 16 based on the weight of the processed material on the chaff sheave 16 can be set to a state where it can be normally performed, and the second line L
In a state in which the pin 31 of the chaflip plate 16A is allowed to move in a range extending from substantially the line 2 to substantially the line of the sixth line L6 connecting the swing fulcrum shaft 33 and the sixth engagement pin 34f,
Since the long hole 32b of the operation lever 32 overlaps the long hole 24c of the left side wall 24, the minimum opening of the first chief sheave 16 at this operation position is determined by the pin 31 of the chaflip plate 16A. Can be set to a relatively large opening state in contact with the front end of the long hole 32b and substantially on the second line L2, and the maximum opening of the first chief sheave 16 can be adjusted by the pin 31 of the chaflip plate 16A. Is in contact with the rear end of the long hole 32b of the operation lever 32 and the sixth line L
6 can be set to a large opening state located on the approximate line.

When the operating lever 32 is engaged with the sixth engaging pin 34f, the operating lever 32 is moved to the fourth engaging pin 34d which is the operating position where the minimum opening of the first chief sheave 16 is set. Since the engagement is held at the operation position displaced in the opening side direction of the first chief sheave 16 from the position, the urging force of the urging spring 30 can be maintained at the original size, and the first chief sheave can be maintained. The operation of adjusting the opening degree of the first chief sheave 16 by the weight of the processed material on the operation lever 16 can be set normally.
The rear end of the long hole 32a coincides with the rear end of the long hole 24c of the left side wall 24, and the sixth line L6 is positioned substantially on the third line L3.
The operation lever 32 is moved relative to the long hole 24c of the left side wall 24 so as to allow the pin 31 of the chaflip plate 16A to move within the range of contacting the rear end of the long hole 24c of the left side wall 24 beyond the left side. Since the long holes 32b overlap,
The pin 31 of the chaff flip plate 16A determines the minimum opening of the first chaff sheave 16 in this operation position by the operation lever 32.
Along with the front end of the long hole 32b, the opening degree can be set to a large opening state substantially on the third line L3, and the maximum opening degree of the first chief sheave 16 is set by the pin 31 of the chaff flip plate 16A by the left side wall 24. Can be set to a limit maximum opening degree state (full opening state) in contact with the rear end of the long hole 24c.

With the above structure, for example, the crops to be harvested are more likely to produce broken straws during threshing, such as wheat, and to be more likely to leak out of the first chaff sieve 16 due to being dry. The operating lever 32 is moved to the first engagement pin 3 of the first engagement pin 34a to the sixth engagement pin 34f.
4a, the minimum opening and the maximum opening of the first chief sheave 16 can be set to a small opening state, and the opening of the first chief sheave 16 due to the weight of the processed material on the first chief sheave 16. It is possible to make it difficult to perform the degree adjustment operation, and it is possible to more effectively suppress the leakage of the broken straw contained in the processed material on the first chief sieve 16 from the first chief sieve 16, thereby improving the sorting accuracy. Can be planned. Conversely, the more the crop to be harvested is such that rice is unlikely to be cut during threshing, such as rice, and is less likely to leak out of the first chief sieve 16 due to wetness, the more the operating lever 32 is moved. The minimum opening degree and the maximum opening degree of the first chief sheave 16 can be set to a large opening state by engaging one of the one engagement pin 34a to the sixth engagement pin 34f on the side of the sixth engagement pin 34f. At the same time, it is possible to easily perform the opening degree adjustment operation of the first chief sieve 16 based on the weight of the processed material on the first chief sieve 16, and from the first chief sieve 16 of the grain contained in the processed material on the first chief sieve 16 in a large amount. Can be promoted, so that the sorting efficiency can be improved while suppressing the decrease in the sorting accuracy.

That is, 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 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 degree, and the difficulty level of the opening degree adjustment operation of the first chief sheave 16 based on the weight of the processed material on the first chief sheave 16, thereby improving the sorting efficiency and the sorting accuracy. It is designed to be effective.

As shown in FIGS. 4, 7 and 11, a support piece 32 of an operation lever 32 for supporting one end of an urging spring 30 is provided.
A is a rectangular shape in which a single through hole 32h is formed at the front and rear intermediate position, and a first engagement position a where one end of the biasing spring 30 is hooked from the front end to the through hole 32h, It is formed to have a second engagement position b where one end of the biasing spring 30 is hooked from the end to the through hole 32h. Each of the engagement positions a and b corresponds to the chaflip plate 16A.
The more the pin swings to the lower side, the more the pin 31 of the chaflip plate 16A that supports the other end of the biasing spring 30 from the first engagement position a.
The distance H1 from the second engagement position b to the pin 31 of the chaflip plate 16A is set to be greater than the distance H2 from the second engagement position b. When engaged with the position a, the biasing spring 3
The elastic biasing force of the biasing spring 30 can be made larger than when one end of the zero is engaged with the second engagement position b. That is, by changing the hooking position of the biasing spring 30 with respect to the support piece 32A, the elastic biasing force of the biasing spring 30 can be changed in two stages. In addition to the operation of changing the operation lever 32 to the engaged position, the degree of difficulty of the opening degree adjustment operation of the first chief sheave 16 at each operation position can be changed in two stages. The difficulty of the opening adjustment operation of the first chaff sheave 16 due to the weight of the processed material can be changed to a state more suitable for the type of crop to be harvested and the degree of wetness, so that the sorting efficiency and the sorting accuracy can be improved. The improvement can be achieved even more effectively.

As shown in FIG. 11, the support piece 32A is inclined obliquely forward and backward with respect to the through-hole 32h in the non-hook direction, than the distance H3, H4 in the front-back direction with respect to the through-hole 32h in the hook direction with the biasing spring 30. Direction distance H5, H
6 is formed to be large,
It is possible to prevent one end of the biasing spring 30 from moving from the first engagement position a or the second engagement position b with the through hole 32h as a fulcrum. That is, the support piece 32A of the biasing spring 30
The hooking posture of the urging spring 30 with respect to the support piece 32A changes due to the selective swinging motion of the sheave case 6 and the tension length of the urging spring 30 changes. This can prevent the change of the elastic urging force of the urging spring 30 caused by the above. In short, by elaborating the shape of the support piece 32A,
Irrespective of the swinging movement of the sheave case 6, the first chief sheave 16 can be stably biased toward the closed side by the elastic biasing force set in consideration of the type of crop to be harvested and the degree of wetness. The opening degree of the chaff sheave 6 can be stably adjusted according to the amount of the processed material.

As shown in FIGS. 4, 7 and 8, the operating lever 32 is made of a spring material that elastically returns to a state along the left side wall 24 of the sheave case 6, and resists the returning force. The engaging member 34 is elastically deformed by
And the engagement with the engagement member 34 can be maintained by the return force. or,
Since the engagement with the engagement member 34 is released by the elastic deformation, the engagement hole 32b is formed as a long hole whose direction along the extending direction of the operation lever 32 is elongated. Reference numeral 35 shown in FIGS. 4 and 8 indicates that when the operation lever 32 is elastically deformed to release the engagement with the engagement member 34, the chaflip plate 1
A detachment prevention member for preventing the long hole 32b of the operation lever 32 from coming off the 6A pin 31.

The first chaff sheave 16 has an extending portion 37A extending rearward from the swing fulcrum shaft 33, and the first chaff sheave 16 swings the pin 31 and the second chaff flip plate 16A from the rear. The balance weight 37 is provided so as to be swingable integrally with the fulcrum shaft 33. The operation of the balance weight 37 allows the opening of the first chief sheave 16 with a small operating force due to a change in the weight of the workpiece. The adjusted first chief sheave 16 can be prevented from opening and closing due to its own weight when the sheave case 6 is driven to swing.

As shown in FIG. 4, the biasing spring 30, the operating end of the operating lever 32 and the support piece 32A, and the engaging member 34 are
Inspection port 2 formed on the front side of the left side wall of the threshing device
7, the minimum opening and the maximum opening of the first chief sheave 16 and the urging force of the coil spring 30 are changed from the inspection port 27 in accordance with the type of crop to be harvested and the degree of wetness. The operation of changing the engagement position of the operation lever 32 and the operation of changing the hooking position of the biasing spring 30 on the support piece 32A can be easily performed. In other words, even when operating the operation lever 32 for setting the opening of the first chief sheave 16 or when changing the hooking position of the urging spring 30 with respect to the support piece 32A,
The existing inspection opening 27 can be used effectively, thereby saving the trouble of newly providing a dedicated opening for operating the operation lever 32 and the biasing spring 30 on the left side wall of the threshing device. In addition, the opening degree setting of the first chaff sheave 16 and the change of the difficulty level of the opening operation by these operations can be easily performed from one side of the sheave case 6.

As shown in FIG. 12, the inspection port 27 is provided with an inspection lid 38 for closing the inspection port 27.
The inspection lid 38 is made of a substantially rectangular sheet metal material, and has two bolts 39 protruding from the left side wall of the threshing device above the inspection lid 38.
The notch 38A which engages with the
A pair of engaging portions 38B to be inserted into the lower edge of the handle 7 are formed, and a handle 38C is projected from an outer surface thereof.
Is engaged with the bolt 39, and the engaging portion 38B is
After inserting the wing nut 40 into the bolt 39 after inserting the wing nut 40 into the lower edge of the threshing device, the inspection port 27 can be fixed to the left side wall of the threshing apparatus in a closed state. Has become. In addition, the inspection port 27 can be opened by removing the threshing device from the left side wall in the reverse order.

As shown in FIG. 13, the inspection lid 38 is made of a transparent vinyl sheet, and the upper part of the inspection lid 38 is bolted to the upper part of the inspection port 27 on the left side wall of the threshing device with bolts and nuts 41. Fixing and checking lid 38
An engagement tape 42A attached to the lower portion of the threshing device, a first engaged tape 42B attached below the inspection port 27 on the left side wall of the threshing device, and an upper portion of the inspection lid 38 on the left side wall of the threshing device. A planar fastener 42 that is adhered to the second engaged tape 42C is provided to simplify the configuration of the inspection lid 38 and reduce the manufacturing cost required for the inspection lid 38, The state in which the inspection opening 27 is closed by the inspection lid 38 and the state in which the inspection opening 27 is opened only by changing the engagement tape 42A of 42 between the first engaged tape 42B and the second engaged tape 42C. May be easily displayed.

As shown in FIG. 14, the inspection lid 38 is made of a transparent vinyl sheet, and the upper part of the inspection lid 38 is fixed to the upper part of the inspection port 27 on the left side wall of the threshing device with fixing pins 43. Further, an engagement hole 38a is formed in a lower portion of the inspection lid 38, and a first engagement pin 43 is provided below the inspection port 27 on the left side wall of the threshing device.
In addition, second engagement pins 44 are provided above the inspection lid 38 on the left side wall of the threshing device, respectively, to simplify the configuration of the inspection lid 38 and reduce the manufacturing cost required for the inspection lid 38. Also, only by changing the engagement target of the engagement hole 38a between the first engagement pin 43 and the second engagement pin 44,
A state in which the inspection port 27 is closed by the inspection lid 38 and the inspection port 2
7 may be easily displayed.

As shown in FIG. 3, the sheave case 6 comprises 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 includes a front coarsely sorted body 6 </ b> A which is
Is mounted on the lateral side wall 6a. Also, FIG.
As shown in FIG. 5, an elongate hole 24c for allowing the movement of the pin 31 in accordance with the opening and closing operation of the first chief sheave 16,
2 is engaged with the left side wall 6c of the sheave case main body 6C which is a part of the lateral side wall 24 of the sheave case 6.
Is prepared for.

[Other Embodiments] Hereinafter, other embodiments of the present invention will be listed. Three or more hooking positions of the urging spring 30 may be provided so that the elastic urging force of the urging spring 30 can be changed in three or more steps. The urging spring 30 is connected to the pin 31 of the first chaff sheave 16.
And the sheave case 6. As a configuration without the operation lever 32 or the like, instead of setting the opening degree of the first chief sheave 16 by the operation lever 32, the configuration may be simplified.

[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 the sheave case showing an opening degree setting state of the chaff sheave in which the operation lever is engaged with the fourth engagement pin and an elastic biasing state of the urging spring toward the chaff sheave closing side.

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 plan view showing the shape of a support piece.

12A is a side view of a main part showing a configuration of the inspection lid, and FIG. 12B is a vertical sectional rear view of a main part showing a configuration of the inspection lid.

13A is a side view of a main part showing a configuration of an inspection lid according to a first modified example. FIG. 13B is a longitudinal sectional rear view of a main part showing a configuration of an inspection lid according to a first modified example.

14A is a main part side view showing a configuration of an inspection lid according to a second modified example. FIG. 14B is a longitudinal sectional rear view of a main part showing a configuration of an inspection lid according to a second modified example.

[Explanation of symbols]

 6 Sheave case 16 Chaff sheave 16A Chaflip plate 30 Energizing spring 32A Support piece H3 Hook distance H4 Hook distance H5 Non-hook direction distance H6 Non-hook distance P3 Lateral fulcrum

Claims (2)

[Claims] 1. A structure in which a group of chaff flip plates of a chaff sheave provided in a sheave case is swingably connected around a horizontal fulcrum set at each upper end so that the opening of the chaff sheave can be adjusted. An urging spring that elastically urges the chaff sheave to the closing side is provided so that the opening degree changes according to the amount of the processed material on the chaff sheave, and
A sheave case structure of a threshing device configured to change an elastic biasing force of the biasing spring by changing a hooking position of the biasing spring. 2. An end of the biasing spring is supported by a support piece formed such that a distance in a non-hooking direction is larger than a distance in a hooking direction from the biasing spring.
A sheave case structure of the threshing apparatus described in the above.