JP6793534B2 - General-purpose combine - Google Patents

Description

The present invention relates to a general-purpose combine that controls the raising and lowering of a reel with respect to a cutting portion connected to a traveling machine body.

The traveling machine body, a cutting section that is vertically connected to the traveling machine body, a reel that is supported so as to be raised and lowered by the cutting section, and a control section are provided, and the height position is set according to the type of crop to be cut. Normal cutting control that raises and lowers the reel to carry out crop scraping, forced scraping control that executes forced scraping at the position where the reel is lowered, and lodging cutting at the position where the reel is lowered. The general-purpose combine described in Patent Documents 1 and 2 configured to be able to execute the lodging control to be executed is conventionally known.

Japanese Patent No. 5809003 Japanese Patent No. 5809004

According to the combine of the above documents, it is convenient because the operation of moving the scraping reel from the normal cutting work position to a position suitable for forced scraping or lodging cutting and returning it to the original position can be performed by one-touch operation. On the other hand, the tine of the rotating reel located on the lower side of the lifting range may come into contact with the field side and scrape mud etc., which causes dirt when cutting crops such as soybeans. There was a problem that it may become.

An object of the present invention is to provide a general-purpose combine that can efficiently prevent the reel from scraping mud or the like in a field.

In order to solve the above problems, the traveling machine body 2, the cutting section 3 that is vertically connected to the traveling machine body, the reel 4 that is supported so as to be raised and lowered by the cutting section 3, and the reel that drives the reel 4 up and down. An elevating actuator 37, a reel elevating height detecting means 39 for detecting the elevating height of the reel 4 with respect to the cutting unit 3, and a control unit 50 for controlling the elevating of the reel 4 are provided, and the reel 4 is a grain. It has a tine 18 that scrapes the sword, and the tine 18 is always maintained in a downward hanging posture even during the rotation of the reel 4, and the lower side of the movement locus D on the lower end side of the tine 18 is arcuate. When it is detected that the target to be cut is beans, the control unit 50 moves the movement locus D of the lower end of the tine 18 from the lower surface side of the cutting unit 3. The reel elevating actuator 37 so that the movement locus D of the lower end portion of the tine 18 does not project to the lower surface side of the cutting portion 3 from the allowable state where the reel elevating actuator 37 is allowed to descend to a position where it projects downward. It is characterized in that it is constituted of operation so obtain switched to the restricted state to restrict.

Secondly , the lower surface side of the cutting portion (3) is at a height position of the cutting blade 12 of the cutting portion 3, the lower surface of the cutting frame 8 , or the lower end of the divider 9.

According to the present invention, it is possible to efficiently prevent the reel from scraping mud or the like in the field when the cutting work is executed by the cutting section, so that even if the cut crop is soybean or the like, the crop is polluted. It can be kept in high quality.

Further, according to the switching means having a switching operation tool, it is possible to smoothly regulate the lowering operation of the reel below the reel regulation height.

Further, it includes a ground height detecting means for detecting the ground height of the cutting unit and a control unit for controlling the raising and lowering of the reel, and the control unit detects the ground height during switching to the regulated state. When it is detected by the means that the cutting portion is located above the non-grounding height, which is the ground height at which the reel does not touch the ground even if the reel is lowered below the reel regulation height, the cutting portion is located below the reel regulation height. According to the one configured to allow the lowering operation of the reel to, the reel can be lowered below the reel regulation height depending on the situation, so that the versatility is further improved.

It should be noted that the reel regulation height is the height position of the cutting blade of the cutting portion, the lower surface of the cutting portion, or the lower end of the divider, so that the reel can be prevented from coming into contact with the field. , The grain can be effectively prevented from becoming dirty.

It is an overall plan view of the general-purpose combine to which this invention is applied. It is an overall side view of the general-purpose combine to which this invention is applied. It is a side view of the main part which showed the structure of the threshing apparatus. It is a side view of the main part which showed the cutting part. It is a side view which showed the state which raises and lowers a reel by a movable mechanism. It is a side view which showed the state which moved the reel back and forth by the movable mechanism. It is a power transmission system diagram of this general-purpose combine. It is a top view which showed the control part. It is a top view of the switch panel. It is a block diagram which shows the structure of a control part.

1 and 2 are an overall plan view and an overall side view of a general-purpose combine to which the present invention is applied, FIG. 3 is a side view of a main part showing the configuration of a threshing device, and FIG. 4 shows a cutting portion. It is a side view of the main part. The illustrated general-purpose combine harvesters crops such as rice, wheat, and beans. This general-purpose combine is formed into a tubular shape extending in the left-right direction, with a traveling machine body 2 having a pair of left and right crawler type traveling devices 1 and 1, and a cutting unit 3 movably connected to the front portion of the traveling machine body 2. It includes a reel 4 and a movable mechanism 6 that supports the reel 4 on the cutting portion side so as to be able to move up and down and back and forth in a state where the reel 4 can be rotationally driven around its own axis.

The cutting portion 3 integrally has a feeder 7 in the rear half portion and a cutting frame 8 in the front half portion. In the cutting frame 8, the cursive script 9 is projected forward from the left and right side walls, and a columnar scraping auger 11 extending in the left-right direction is provided in the lower rear portion between the left and right side walls. It is supported so that it can be rotationally driven around the axis. Further, a reciprocating cutting blade 12 extending in the left-right direction is installed diagonally downward in front of the scraping auger 11. By the way, the reel 4 is arranged between the left and right side walls of the cutting frame 8 in a plan view.

The feeder 7 has a feeder conveyor 13 that carries the crops cut by the cutting blade 12 backwards in a box-shaped case. The feeder 7 is arranged on the left side of the control unit 14 provided on the right side portion of the traveling machine body 2 in the forward direction in a plan view. The above-mentioned cutting portion 3 is supported by the front portion of the traveling machine body 2 so as to be able to swing up and down with the swing shaft 3a at the rear end of the feeder 7 as a fulcrum.

The cutting frame 8 is a rear wall having a bottom surface covering the lower part of the scraping auger 11 between the left and right side walls and an opening (not shown) connected to the front end side of the feeder 7 to send the cut grain culm. It is formed in a box shape by the above, and a platform for sending the cut grain culms whose roots are cut by the cutting blade 12 while being scraped by the reel 4 to the feeder 7 while being collected by the scraping auger 11. It is configured to be.

A lift cylinder 16 which is a hydraulic cutting-side lifting actuator for raising and lowering the cutting section 3 with respect to the traveling machine 2 by expansion and contraction operation is provided between the cutting section 3 and the front portion of the traveling machine body 2. There is. By expanding and contracting the lift cylinder 16, the cutting section 3 swings up and down (elevates) with respect to the traveling machine body 2.

In addition, on the lower surface side of the cutting section 3, a cutting height detecting means (ground height detecting means) 10 for detecting the cutting height of the crop by the cutting section 3 is provided. The cutting height detecting means 10 includes a detection plate 15 that swings up and down with a swing axis in the left-right direction formed on the lower surface side of the cutting portion 3 as a fulcrum, and a potentiometer that detects the vertical swing position of the detection plate 15. It is composed of and.

According to the cutting height detecting means 10 having the above configuration, the control unit 50 described later controls the lowering operation and the lodging cutting of the cutting unit 3 by the multi-steering lever 68 described later during the normal cutting work of cutting the crops in the field. , When performing forced scraping control, etc., the cutting unit 3 is lowered to the cutting position (lower position), or when the cutting unit 3 is lowered by the multi-steering lever 68 during non-cutting work, etc. When the lowering operation is performed to the (lower position), the cutting unit 3 can be controlled so as not to come into contact with the field. The cutting position of the cutting unit 3 can be changed according to the type of crop to be cut.

The reel 4 is composed of a frame formed in a prismatic shape (hexagonal columnar in the illustrated example) extending in the left-right direction, and a tine 18 is suspended and supported around the frame. There is.

A plurality of the tines 18 are provided in a state of being arranged side by side at each apex portion of the polygonal side surface shape of the frame, and are always directed downward by a tine holding mechanism (not shown) even during rotation of the reel 4. It is maintained in the hanging posture, and its movement locus D becomes a distorted arc shape as shown by a virtual line in FIG. The tine 18 of this configuration allows the crop to be scraped backwards.

With this configuration, the grain culms of the crops in the field that have been scraped backward by the tine 18 of the rotating reel 4 are cut by the cutting blade 12 that slides back and forth in the left-right direction, and rearward by the scraping auger 11 (feeder 7 side). ). The crop introduced to the feeder 7 side is rearwardly conveyed to the traveling machine body 2 side by the feeder conveyor 13.

The left half of the traveling machine 2 is threshed for crops such as rice, wheat and beans carried backward by the feeder 7, and threshed to select grains such as paddy from the processed products. The device 19 is installed. On the right half of the traveling machine 2, a grain tank 21 for storing grains that have been threshed and sorted by the threshing device 19 and a control unit 14 arranged in front of the grain tank 21 are provided.

The threshing device 19 has a handling chamber 22 into which crops from the feeder conveyor 13 are introduced, and a sorting chamber 23 formed directly below the handling chamber 22. In the handling chamber 22, a columnar handling cylinder 24 extending in the front-rear direction is rotatably supported around its own axis. A swinging sorting body 26 that moves back and forth is installed in the upper part of the sorting chamber 23. Further, in the lower part of the sorting chamber 23, a wall insert fan 27 that blows a sorting wind diagonally upward to the rear is arranged on the front side, and behind the wall insert fan 27, the first spiral 28 and the second spiral 29 are front and rear. They are provided side by side (see FIG. 3).

With this configuration, all the crops that have been thrown from the feeder 7 to the threshing device 19 side are threshed while being transported backward by the threshing cylinder 24 that is rotationally driven in the handling chamber 22, and the processed products that have been threshed are sorted. It falls into the chamber 23. The processed material that has fallen into the sorting chamber 23 is shake-sorted by the swing-sorting body 26 and sorted (wind-sorted) by the sorting wind.

Specifically, it is sorted into the first thing that falls on the first spiral 28 side, the second thing that falls on the second spiral 29 side, and the dust such as straw dust that is sent diagonally upward and backward. The first product is transported as grains into the grain tank 21 by the first racen 28, the second product is re-injected into the sorting chamber 23 by the second racen 29 and sorted, and the dust is traveling. It is discharged from the rear end side of the aircraft 2.

The grains stored in the grain tank 21 are discharged to the outside of the machine by the discharge auger 32 supported at the rear end of the traveling machine body.

The movable mechanism of the reel will be described with reference to FIGS. 5 and 6. FIG. 5 is a side view showing a state in which the reel is moved back and forth by the movable mechanism, and FIG. 6 is a side view showing a state in which the reel is moved up and down by the movable mechanism.

In the movable mechanism 6, the lower end portion is supported by the feeder 7 so as to be swingable back and forth, and the front and rear movement arms 33 are arranged in parallel on the left and right, and the upper end portions of the front and rear movement arms located at both left and right ends are vertically swingable. A pair of lifting arms 34 with a rear end supported, a single hydraulic reel forward / backward moving cylinder 36 that collectively drives all the front / rear moving arms 33 in the same posture by telescopic operation, and left / right raising / lowering. It is provided with a pair of hydraulic reel elevating cylinders 37 that are arranged between the middle part of the arm 34 and the cutting frame 8 and that vertically swing drive the left and right elevating arms 34 in the same posture by expansion and contraction operation.

With this configuration, the reel 4 is cut by the tine 18 from the reel rising position where the tine 18 is located above the cutting portion 3 (cutting frame 8) by the expansion and contraction operation of the reel front and rear cylinders 36 and the reel elevating cylinder 37. It can be raised and lowered to the reel lowering position protruding downward of the portion 3. By the way, the lowering operation of the reel 4 is controlled by the regulation control by the control unit. Details will be described later.

The front-back swing position (reel back-and-forth movement position) of the front-back movement arm 33 is detected by the reel front-back movement position detecting means 38 including a potentiometer provided on the lower end side of the front-back movement arm 33. Further, the elevating position (reel elevating position) of the elevating arm 34 is detected by the reel elevating height detecting means 39 including a potentiometer.

The power transmission system of the general-purpose combine having the above configuration will be described with reference to FIG. 7. FIG. 7 is a power transmission system diagram of this general-purpose combine. From the figure, the power output from the engine 43 is divided into the power of the traveling system and the power of the working system on the most upstream side of the transmission. The power of the traveling system is transmitted to the left and right crawler type traveling devices 1 and 1 via the traveling HST 44 and the transmission 46. The power of the working system is intermittently transmitted to the threshing drive shaft 48 via the threshing clutch 47. The power transmitted to the threshing drive shaft 48 drives each part of the threshing device 19, and is intermittently transmitted to the cutting part 3 and the reel 4 side via the cutting clutch 49.

The power intermittently transmitted by the cutting clutch 49 is transmitted to the feeder drive shaft 51. The power transmitted to the feeder drive shaft 51 conveys and drives the feeder conveyor 13, and is also transmitted to the branch shaft 52. The power transmitted to the branch shaft 52 is transmitted to the scraping auger drive shaft 53 to drive the scraping auger 11, and is transmitted to the cutting blade drive shaft 54 to drive the cutting blade 12.

Further, the power transmitted to the branch shaft 52 is also transmitted to the reel transmission 55. The reel transmission 55 includes an input shaft 56 in which the power of the branch shaft 52 is transmitted in a chain, an input pulley 57 that rotates integrally with the input shaft 56, an output shaft 58, and an output pulley that rotates integrally with the output shaft 58. It is composed of 59 and a V-belt 61 that is hung by an input pulley 57 and an output pulley 59. As a result, the reel transmission 55 is configured so that the power transmitted to the input shaft 56 can be steplessly changed and transmitted to the output shaft 58.

With this configuration, the power transmitted to the output shaft 58 is chain-transmitted to the rotating shaft 63 of the reel 4, and the reel 4 can be rotationally driven. That is, the reel transmission 55 can change the rotation speed of the reel 4 steplessly.

The control unit will be described with reference to FIGS. 8 and 9. FIG. 8 is a plan view showing the control unit, and FIG. 9 is a plan view of the switch panel. From the figure, the control unit 14 includes a seat 64 in which the operator sits, a main shift lever 66 and an auxiliary shift lever 67 arranged on the side of the seat 64, and a multi-steering lever arranged in front of the seat 64. It includes 68 and a switch panel 69 arranged behind the main shift lever 66 and the auxiliary shift lever 67.

The multi-steering lever 68 can raise and lower the cutting unit 3 by the lift cylinder 16 by swinging back and forth, and can turn left and right while the traveling machine body 2 is running by swinging left and right. Further, the grip of the multi-steering lever 68 includes a reel up switch 80A and a reel down switch 80B for operating the raising and lowering operation of the reel 4, a reel forward switch 80C for operating the forward and backward movement of the reel, and a reel reverse switch 80D. Is provided.

If the cutting unit 3 is lowered by the multi-steering lever 68 during the cutting work by the cutting unit 3, the cutting height detecting means 10 causes the cutting unit 3 to cut the grain culm in the field. The cutting unit 3 can be lowered to the cutting position (lower position) to be performed. As a result, even when the ascending / descending height of the cutting unit 3 is adjusted by the operator's operation to perform a normal cutting operation, the situation where the cutting unit 3 comes into contact with the field can be reliably prevented.

The auxiliary shift lever 67 is configured to be able to swing forward and backward, and can switch the traveling shift via the transmission 46.

The main shift lever 66 is configured to be able to swing forward and backward, and can perform a traveling shift operation via the traveling HST44. Specifically, the main speed change lever 66 can perform a speed-up operation to the forward traveling side via the traveling HST44 by a forward swing operation from the front-rear neutral position, while being rearward from the front-rear neutral position. By the rocking operation, the speed increasing operation to the reverse traveling side can be performed via the traveling HST44.

Further, the main speed change lever 66 has a grip 66a formed in the upper end portion which is long in the left-right direction, and a momentary type scraping switch which can be pushed while gripping the grip 66a on the side portion of the grip 66a. 71 is provided. Further, an alternate type lodging switch 72 that can be pushed and operated is provided on the front portion of the grip 66a of the main speed change lever 66.

When an ON operation (pushing operation) is detected in the scraping switch 71, the control unit 50 executes forced scraping control. When the forced suction control is executed, the control unit 50 uses the reel elevating cylinder 37 and the reel forward / backward movement cylinder 36 to raise the reel 4 to a position below the elevating range and behind the front / rear movement range (forced suction). The reel 4 is moved to the position) and is rotationally driven by the speed change actuator 81 at a predetermined rotation speed (high-speed rotation) regardless of the vehicle speed. By the way, when the OFF operation of the scraping switch 71 is detected, the reel 4 is configured to return to the state before the ON operation.

With this configuration, even when the vehicle speed is low or the vehicle is stopped, the reel 4 which is rotationally driven at a predetermined speed can forcibly scrape the crops on the spot while cutting the crops. It will be possible.

When an ON operation (pushing operation) is detected in the lodging switch 72, the control unit 50 executes the lodging cutting control. When the lodging mowing control is executed, the control unit 50 uses the reel elevating cylinder 37 and the reel forward / backward moving cylinder 36 to move the reel 4 to a position below the elevating range and on the front side of the front / rear moving range (falling mowing position). The reel 4 is moved and the reel 4 is rotationally driven by a speed change actuator 81 at a predetermined rotation speed (high-speed rotation) regardless of the vehicle speed. By the way, when the OFF operation of the lodging switch 72 is detected, the reel 4 is configured to return to the state before the ON operation.

With this configuration, the crops lying down in the field can be efficiently cut while being scraped by the reel 4 which is rotationally driven at a predetermined speed.

The switch panel 69 includes a crop switching dial 73 that can select at least three types of crops to be cut, beans, wheat, and rice, a grain removal / cutting clutch switch 74 that is a seesaw switch, and the above. It includes a reel rotation speed adjustment dial 76 for adjusting the rotation speed of the reel 4, and a changeover switch (changeover operation tool) 77, which is an alternate type switch operation tool for switching to a regulated state by a control unit described later.

The threshing / cutting switch 74 is in a cutting state in which both the threshing clutch 47 and the cutting clutch 49 are engaged by switching between a state of being inclined to one side, a horizontal state, and a state of being inclined to the other side. It is possible to switch between the threshing state in which only the threshing clutch 47 is connected and the cutting clutch 49 is disconnected, and the connection state in which both the threshing clutch 47 and the cutting clutch 49 are connected.

When the changeover switch 77 is turned on, regulation control is executed in which the lowering operation of the reel is regulated so that the reel 4 does not protrude below the regulated height which is the lower end portion of the cutting portion 3. It is switched to the state. Further, when the changeover switch 77 is turned off, the execution of the regulation control is canceled and the changeover switch 77 is switched to an allowable state in which the lowering operation of the reel 4 below the regulation height is permitted. The details of the regulation control by the control unit 50 will be described later.

Next, the control unit will be described with reference to FIG. FIG. 10 is a block diagram showing the configuration of the control unit. From the figure, on the input side of the control unit 50, the cutting height detecting means 10, the reel forward / backward movement position detecting means 38, the reel raising / lowering height detecting means 39, the scraping switch 71, and the lodging The switch 72, the changeover switch 77, the crop changeover dial 73, the reel up switch 80A, the reel down switch 80B, the reel forward switch 80C, and the reel reverse switch 80D are connected.

On the other hand, on the output side of the control unit 50, the lift cylinder 16, the reel elevating cylinder 37, the reel forward / backward moving cylinder 36, a reel speed change actuator 81 for shifting the rotation speed of the reel, and a grain removal clutch 47. And a clutch actuator 79 that engages and disengages the cutting clutch 49 is connected.

The control unit 50 is configured to execute the regulation control when it is detected that the control switch 77 has been switched to the regulation state by the ON operation (push operation) of the changeover switch 77. When the regulation control is executed, the reel elevating height detecting means 39 and the reel forward / backward moving position detecting means 38 detect the height position of the reel 4 that elevates and moves with respect to the cutting unit 3, and the reel 4 More specifically, the rotation locus D (see FIG. 4) of the lower end of the tine 18 suspended and supported by the reel 4 is not located below the predetermined reel regulation height. The operation of the reel elevating cylinder 37 and the reel forward / backward moving cylinder 36 is regulated.

The reel regulation height in the regulation control is set at a height position at which the reel 4 (tine 18) does not protrude toward the lower surface side of the cutting portion 3 at least in a side view. In other words, the reel regulation height is a height position of the reel 4 with respect to the cutting portion 3, and the rotation locus D of the lower end portion of the tine 18 is higher than the lower surface side of the cutting portion 3, specifically, It is set to either the lower surface of the cutting unit 3 (cutting frame 8), the lower surface of the divider 9, or the height position of the cutting blade 12. As a result, it is possible to reliably prevent the tine 18 from coming into contact with the field.

According to the configuration, for example, the reel 4 is a reel elevating cylinder 37 or a reel because the forced scraping control or the lodging cutting control is executed in a state where the cutting unit 3 is lowered to the cutting position. The tine 18 (rotational locus D), which is the lower end of the reel 4, is mowed from the side view even when the reel 4 is moved up and down and back and forth to the forced suction position and the lodging cutting position by the front-rear moving cylinder 36. It is controlled so that it does not protrude below the lower end side of the portion 3, that is, does not touch the ground.

Similarly, during the execution of the regulation control, even when the reel lowering switch 80B detects the lowering operation of the reel 4, the tine 18 (rotational locus D) at the lower end of the reel 4 is cut from the side view. It is controlled so as not to protrude below the lower end side of the portion 3. Further, during the execution of the regulation control, even when the operation of the forward / backward movement of the reel 4 by the reel forward switch 80C and the reel reverse switch 80D is detected, the tine 18 (rotational locus D) is viewed from the side view. The back-and-forth movement of the reel 4 is controlled so as not to protrude below the lower end side of the reel 4.

According to the regulation control of the configuration, the reel 4 is regulated so as not to be lowered below the reel regulation height. Therefore, the cutting unit 3 is moved to the cutting position (downward) by the lowering operation by the multi-steering lever 68. When the lowering operation is performed to the position), it is possible to reliably prevent the situation where the mud in the field is squeezed by the driven reel 4. As a result, especially when the target to be harvested is beans such as soybeans, the harvested beans (crops) become dirty and the quality deteriorates due to the soil of the field being scraped together with the beans by Tine 18. Can be prevented.

Further, during the execution of the regulation control, the control unit 50 raises and lowers the cutting unit 3 by the lift cylinder 16 to a position where the reel 4 is lower than the reel regulation height by the cutting height detecting means 10. Even when the lowering operation is performed, if it is detected that the reel 4 has risen to a height higher than the height not touching the field (non-grounding height), the raising / lowering position of the reel 4 is higher than the reel regulation height. Is also configured to switch to a permissible state where it is permissible to move downward. The non-grounded height of the cutting unit 3 may be detected by a sensor that detects the elevating position of the cutting unit 3.

According to this configuration, even during the execution of regulation control, if there is no risk of the reel 4 scraping the soil in the field, the reel 4 is lowered below the reel regulation height as necessary. Since it can be operated, versatility can be improved while maintaining the quality of the crop to be harvested.

Next, another embodiment of the regulation control will be described which is different from the above-mentioned example.
By replacing the changeover switch 77 for the changeover operation tool for operating the execution of the regulation control with the changeover dial of the dial type operation tool, the reel regulation height when executing the regulation control can be changed in a plurality of steps. It may be configured so that it can be done.

According to the configuration, the reel regulation height during regulation control can be smoothly changed according to the type of crop to be cut and the state of the field together with the execution operation of the regulation control, so that the versatility is further improved. To do. The switching operation tool is not limited to the dial type operation tool, and may have a configuration that can be set in a plurality of stages.

Further, the control unit 50 is configured to execute the regulation control when it is detected by the crop switching dial 73 that the target of the crop to be harvested is dialed by soybeans (beans). You may.

According to this configuration, when the soil in the field is scraped by the tine 18 of the reel 4, the above-mentioned regulatory control is inevitably applied when performing the soybean cutting work that tends to affect the quality of the cut crop. Since it is executed, it is possible to efficiently prevent a situation in which the execution operation of the regulation control is forgotten in a situation where the regulation control is required.

Further, a sensor for detecting the type of gutter attached below the first racen 28 and the second racen 29 is provided, and the control unit 50 is a gutter attached below the first spiral 28 and the second racen 29. (Not shown), when it is detected that a gutter for soybeans (beans) is attached, the above-mentioned regulation control may be configured to be always executed.

2 Traveling machine 3 Cutting part 4 Reel 10 Cutting height detecting means (ground height detecting means)
12 Cutting blade 37 Reel lifting cylinder (reel lifting actuator)
50 Control unit 77 Changeover switch (changeover means, changeover operation tool)

Claims (2)

Traveling aircraft (2) and
A cutting section (3) that is vertically connected to the traveling machine and
A reel (4) that is supported up and down by the cutting section (3),
A reel elevating actuator (37) that elevates and drives the reel (4),
Reel elevating height detecting means (39) for detecting the elevating height of the reel (4) with respect to the cutting portion (3), and
A control unit (50) for controlling the raising and lowering of the reel (4) is provided.
The reel (4) has a tine (18) that scrapes the culm.
The tine (18) is always maintained in a downwardly downward hanging posture even during rotation of the reel (4), and the lower side of the movement locus (D) on the lower end side of the tine (18) has an arc shape. Is configured as
When the control unit (50) detects that the target to be harvested is beans, the movement locus (D) at the lower end of the tine (18) is the lower surface side of the harvesting unit (3). The movement locus (D) of the lower end portion of the tine (18) is moved to the lower surface side of the cutting portion (3) from the allowable state in which the reel elevating actuator (37) is allowed to be lowered to a position where it protrudes further downward. General purpose combine characterized in that it is configured to obtain switched to the restricted state to restrict the operation of the reel lift actuator so as not to protrude (37). The lower surface side of the cutting portion (3) is the height position of the cutting blade (12) of the cutting portion (3), the lower surface of the cutting frame (8 ), or the lower end of the divider (9). General-purpose combine harvester.

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