JPH06209641A - Device for revolving grain culm separating lug in combine - Google Patents

Abstract

PURPOSE:To improve raising performances of grain culm and to prevent entanglement by harmonizing traveling speed with reaping speed. CONSTITUTION:In a combine which is equipped with a thresher 3 set at the upper position, a stationary grain culm separating member 5, a lug rotation type raising device 6 laid behind the grain culm separating member 5 and a hair clipper type reaping blade 21 arranged at the rear of the raising device 6 and supplies grain culm cut by the reaping blade 21 to the thresher 3, a lug rotation type grain culm separating device 10 is installed ahead the stationary grain culm separating member 5 and a grain culm separating lug 15 of the grain culm separating device 10 is not rotated usually but receives power transmission and is rotated when a mode is changed to a lodging mode to give a revolving device of a grain culm separating lug in a combine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for a weed lug in a combine.

[0002]

2. Description of the Related Art In the publicly known Japanese Patent Publication No. 59-2246, a threshing device provided at an upper position, a fixed type grass body provided at a front position, and a lug rotating type pulling device provided at the rear of the grass body are disclosed. The present invention describes a combine having an apparatus and a clipper-type cutting blade provided at a rear portion of the raising apparatus, and supplying a grain culm cut by the cutting blade to the threshing apparatus to thresh. In addition, the above-mentioned known example describes a configuration in which the mowing unit 5 and the traveling device 11 are provided via the continuously variable transmission device 15. When a fallen grain culm is present, the mowing speed can be increased compared to the traveling speed. Is also described.

[0003]

However, in the above-mentioned known example, since the lug rotation type weeding device is not provided, the rotation of the weeding lug is not devised. The lug rotating type weeding device is effective when there are lodging culms,
It has almost no effect when there is no lodging culm. Therefore, it is preferable to rotate only when there is the lodging culm, that is, when the lodging mode is switched to.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to optimize the vehicle speed of a traveling device and the mowing speed of a mowing section, and to prevent the culling of grain stems from occurring.

[0005]

Therefore, according to the present invention, the threshing device 3 provided at the upper position, the fixed type grass body 5 provided at the front position, and the lug rotation type provided at the rear of the grass body 5 are provided. Pulling device 6 and clipper type cutting blade 2 provided at the rear part of the pulling device 6.
1 and the grain culm cut by the cutting blade 21 is used for the threshing device 3
In the combine for feeding and threshing, a lug rotating type weeding device 10 is provided on the front side of the fixed type grass body 5, and the weeding lug 15 of the weeding device 10 does not normally rotate but is in the lodging mode. This is a rotation device for a hay lug in a combine, which is configured to rotate by receiving power transmission when switched.

[0006]

Embodiments of the present invention will be described with reference to the drawings.
Is a machine frame of the combine, 2 is a traveling device provided below the machine frame 1, 3 is a threshing device provided above the machine frame 1, and 4 is a reaping unit provided at a front position of the threshing device 3. The mowing unit 4 is provided with a fixed type grass body 5 at the frontmost position, and a lug rotation type pulling device 6 is provided behind the fixed grass body 5. The lug rotation-type pulling device 6 has a known structure, and includes a pair of upper and lower gears (not shown) that rotate in the longitudinal direction in the longitudinal direction in a case 7 in the longitudinal direction, and an endless chain wound around the gears. A plurality of raising lugs 8 are attached to the chain at predetermined intervals so that they can be raised and lowered, a guide for raising and lowering the raising lugs 8 and a drive mechanism for the chain are provided.
Therefore, the pulling lug 8 of the lug turning type pulling device 6 turns in a direction intersecting with the traveling direction of the machine body to raise the grain culvert, and when turned up, it is folded and moves downward in the case 7. , Projects at the bottom of the case 7 and rises again.

The left and right sides of the mowing section 4 and the raising lugs 8 are folded to move downward in the case 7. On the non-acting side of the lug turning type raising device 6, lugs and lugs that can assist raising are provided. A rotary weeding device 10 is provided. Lag rotation type weeding device 1
In the same manner as in the lug rotation type pulling device 6, 0 is the endless chain 14 wound around the gears 12 and 13 for horizontal axis rotation in the left-right direction provided in the case 11 at predetermined intervals in the endless chain 14. A plurality of weed lugs 15 are attached so that they can be raised and lowered, and a guide (not shown) for undulating the weed lugs 15 and a drive mechanism (not shown) for the endless chain 14 are provided. Is configured to rotate in the horizontal direction in the left-right direction, and the grass lug 15 is rotated in parallel with the traveling direction of the machine body to carry out weeding and raising of the culm. 1
9 is a scraping device, 20 is a star wheel, 21 is a cutting blade, 22
Is the stock grain side grain culm conveying device, 23 is the tip side grain culm conveying device, 2
4 is a stock grain side culm transfer device, 25 is a tip side transfer device, 26 is a rear focusing device, 27 is a grain culm supply transfer device, 2
8 is a handling cylinder.

Therefore, the traveling speed of the traveling device 2 and the working speed of the mowing section 4 are shifted in synchronism with the traveling speed and the working speed, and the mowing section shift is provided in the rotation transmission path to the mowing section 4. A device 30 is provided so that the working speed of the mowing unit 4 can be relatively fast with respect to the traveling speed, so that the felled grain culms can be smoothly mowed. Then, the lug rotation type weeding device 10 is configured to operate when the reaper section transmission device 30 sets the laid-down mode. The specific configuration will be described below. Reference numeral 31 denotes a transmission case that transmits rotation to the traveling device 2, and the case 31 includes an HST motor 32 of an HST transmission mechanism 38 (hydraulic continuously variable transmission hydrostatic transmission).
The HST motor 32 is connected to the HST pump 33 by an oil feed pipe, and the amount of oil fed to the HST motor 32 by the HST pump 33 is changed steplessly so that the engine 3
The rotation of 4 is transmitted to the axle 35 while continuously changing the speed.

The mission case 31 includes an axle 35.
The output shaft 36 that transmits the rotation changed by the HST transmission mechanism 38 is transmitted to the input shaft 37 of the cutting unit transmission 30. The input shaft 37 of the reaper unit transmission device 30 includes a fall clutch 40 that relays rotation transmitted to a fall gear 39 that is rotatable with respect to the input shaft 37, and a rotation clutch that is rotatable with respect to the input shaft 37. A standard clutch 42 that connects and disconnects the rotation transmitted to the standard gear 41 is provided, and when one of the fall clutch 40 and the standard clutch 42 is engaged, the other is disengaged. Further, the harvesting section transmission device 30 is provided with a transmission intermediate shaft 43 provided in parallel with the input shaft 37,
An intermediate small gear 44 that meshes with the fall gear 39 and an intermediate large gear 45 that meshes with the standard gear 41 are fixed to the speed-changing intermediate shaft 43. A switching clutch shaft 46 is provided in the vicinity of the speed-changing intermediate shaft 43, and a mission-side input gear 47 that meshes with the intermediate large gear 45 is rotatably attached to the switching clutch shaft 46 so as to switch between the mission-side input gear 47 and the switching. A transmission side input clutch 48 is provided between the clutch shafts 46. Further, the switching clutch shaft 46 is provided with an engine side input gear 49 through which the rotation of the engine 34 is transmitted, and an engine side input clutch 50 is provided between the engine side input gear 49 and the switching clutch shaft 46. The transmission side input clutch 48 and the engine side input clutch 50 are
When either one is on, the other is off, but normally the mission-side input clutch 48 is configured to be "on", and when the working speed of the mowing unit 4 becomes higher than a predetermined speed. , The engine side input clutch 50 is automatically turned on and a constant rotation is transmitted to the cutting unit 4.

An output shaft 53 of the reaper section transmission device 30 is provided near the switching clutch shaft 46, and a gear 54 of the output shaft 53 and a gear 55 provided on the switching clutch shaft 46 mesh with each other to form an output shaft. At 53, a mowing section output pulley 56 for outputting to the mowing section 4 and the like is provided. Therefore, in the mowing unit transmission 30, the standard transmission path A from the standard clutch 42 to the output shaft 53, and the fall clutch 40 to the output shaft 5 are provided.
The transmission path B for falling down to 3 and the transmission path C for constant speed from the engine 34 to the output shaft 53 are formed. Then, the mowing unit 4 is configured by attaching the lug rotation-type raising device 6, the lug rotation-type weeding device 10, the cutting blade 21 and the like to the mowing unit frame 57. Reference numeral 58 denotes a lower frame. Vertical side frames 59 are provided on the left and right sides of the lower frame 58, and the upper portions of the left and right side frames 59 are connected by an upper frame 60. The lower part of the support pipe 61 is fixed to the support pipe 6
A horizontal cylinder 62 is provided at the base of No. 1, and the horizontal cylinder 62 is rotatably supported on the machine body side and is vertically rotatable by a mowing vertical cylinder 63.

The horizontal cylinder 62 includes the reaper output pulley 5
6, a reaper input pulley 64 is provided, and rotation of the reaper input pulley 64 is provided in a transmission shaft 65 provided in the lower frame 58, a transmission shaft 66 in a side frame 59, and an upper frame 60. The transmission shaft 67 is transmitted to each part by the transmission shaft 67. Front and rear support members 68 and 69 are provided on the left and right ends of the upper frame 60 to support the support member 6.
8 and 69 are provided with left and right support cylinders 70 and 71, transmission cylinders 72 and 73 are provided in the support cylinder 70 and the support cylinder 71, and the support cylinders 70 and 71 and the transmission shafts 72 and 73 are respectively provided with the lugs. The case 11 and the gear 12 of the rotary weeding device 10 are attached. An auxiliary sward pulling in / out clutch 75 is provided at the end of the transmission shaft 67 of the upper frame 60, and the auxiliary shunting in / out clutch 75 is used to move the lug rotation type weeding device 10.
However, as described above, the auxiliary weeding pulling in / out clutch 75 is operated corresponding to the fallen clutch 40 of the mowing section transmission 30. 76 is the transmission shaft 6
7 is a sliding engagement member provided only for sliding, 77 is a transmission gear that is loosely fitted to the transmission shaft 67, 78 is a shifter, and 79 is a motor for operating the shifter 78, which is transmitted to the sliding engagement member 76. The gear 77, the shifter 78, and the motor 79 constitute an auxiliary weeding pull-in / out clutch 75, and the motor 79 rotates the shifter 78 to connect and disconnect the sliding engagement member 76 and the transmission gear 77. Reference numeral 80 is a gear provided on the transmission shafts 72 and 73, and 81 is a chain.

Therefore, in the rotation transmission path from the mowing section input pulley 64 to the lug rotation type pulling device 6,
Pull-out load detection device 8 for detecting the load of rotation of the pull-up lug 8
2 is provided, and the pull-up load detection device 82 controls the operation of the standard clutch 42, the fall clutch 40, and the auxiliary weed pull-in / punch-off clutch 75 in the harvesting section transmission device 30. That is, in the case of the fallen grain culm, the burden of pulling up the lug rotation type pulling device 6 becomes large, and when the pulling load detection device 82 detects this load, the fallen grain culm work mode is set and the fallen clutch 40 is operated. And, when the load is reduced by turning on the auxiliary sward pulling in / out switching clutch 75, the lodging clutch 40 and the auxiliary swarding in / out switching clutch 75 are turned off, and the standard clutch 42 is turned on. The induced load detection device 82 is configured to detect the twist of the transmission shaft 66 in the side frame 59 with a sensor (strain gauge). Therefore, in the present embodiment, with respect to the upper and lower sides of the mowing unit 4, even when both the mowing clutch operating lever 85 for turning on and off the mowing clutch 83 and the threshing clutch 84 are in the ON state, the mowing unit 4 with respect to the body frame 1 is Pitatomaru (registered trademark) automatic control is performed to automatically disengage the reaping clutch 83 and stop the reaper 4 when it is moved above the set height. Further, the traveling device 2 is provided with a rolling mechanism and a pitching mechanism for horizontally controlling the vehicle body. When the vehicle height is raised by the rolling mechanism and / or the pitching mechanism or when the vehicle descends forward, PITATOMARU (registered trademark) is used. ) Automatically correcting the set height of the mowing unit 4 for stopping the mowing unit 4 according to the state of the machine. That is,
When the vehicle height is raised by the rolling mechanism and / or the pitching mechanism or when the vehicle is descending forward, the mowing unit 4 is automatically controlled by Pitatomaru (registered trademark) even when the mowing height is adjusted by slightly moving the mowing unit 4 upward. It is the one that prevents it from stopping. In the figure, 86 is an intermediate shaft provided with a plurality of intermediate gear groups 87 constituting the constant speed transmission path C, 88 is an intermediate transmission shaft, 89 is an output pulley to the threshing portion, and 90 is the lug-type pulling device 6. It is a mounting transmission cylinder to be mounted.

[0013]

[Operation] Next, the operation will be described. (Normal work) The rotation of the engine 34 is transmitted to the HST pump 33, and the HST pump 33 continuously changes the amount of oil fed to the HST motor 32 to change gears and transmit the rotation to the axle 35 of the transmission case 31. To drive the aircraft. On the other hand, the rotation transmitted to the transmission case 31 via the HST motor 32 is transmitted to the input shaft 37 of the reaper section transmission device 30 via the output shaft 36, and the standard clutch 42, which is normally ON, causes the rotation of the input shaft. The rotation of 37 is transmitted to the standard gear 41, the rotation of the standard gear 41 is transmitted to the mission side input gear 47 via the intermediate large gear 45, and the mission side input gear 47 loosely fitted to the switching clutch shaft 46. Rotation of the switching clutch shaft 4 is transmitted to the switching clutch shaft 46 by the transmission side input clutch 48.
The rotation of 6 is transmitted to the output shaft 53 via the gear 55 fixed to the switching clutch shaft 46 and the gear 54 fixed to the output shaft 53 by the standard transmission path A from the standard clutch 42 to the output shaft 53. And is output to the mowing unit 4 from the mowing unit output pulley 56.

Then, the mowing unit 4 weeds by the fixed type weeding body 5, raises it by the lug turning type raising device 6, and raises the grain culms raised by the lug turning type raising device 6 by the lag turning type weeding device. Weeding by 10 and scraping by the scraping device 19 and cutting blade 2
The stock of the grain culm cut and cut in 1 is carried by the stock yuan side grain culm transporting device 22 and the tip side is carried by the tip side grain culm transporting device 23, and this grain culm is transported by the stocker side grain culm transfer device 24. And the tip side grain culm transfer / conveyance device 25 takes over to the grain culm supply / conveyance device 27 to be supplied to the threshing chamber of the threshing device 3, and threshes. in this case,
Since the rotation of the engine 34 is changed by the HST speed change mechanism 38 and output from the transmission case 31 to the axle 35 and the output shaft 36, the traveling speed of the traveling device 2 and the lug rotation-type pulling device 6 of the reaper 4 are provided. And the working speed of the reaper 4 such as the raising of the grain-side grain culm transporting device 22 and the transport of the tip side grain culm transporting device 23 can be synchronized with each other, and smooth work can be performed. Incidentally, the rotation of the mowing output pulley 56 may be transmitted to the stocker side grain stalk transfer device 24, the tip side transfer device 25, the grain stalk supply transfer device 27, etc.
The transmission destination is arbitrary.

(Overlay grain culm mowing work) In the layover grain culm mowing work, the pulling lug 8 of the lug rotating type pulling device 6 of the mowing section 4
If the raising speed of the grain culm is slow, the root will be cut without sufficiently raising the lodging grain culm, so the cutting unit 4
The work speed of can be smoothly performed if it is relatively faster than the traveling speed. Therefore, when the lodging clutch 40 of the reaper unit transmission 30 is turned on, the rotation of the input shaft 37 causes the accommodation gear 3 to rotate via the accommodation clutch 40 in the accommodation transmission path B.
9, the gear shifting intermediate shaft 43 is rotated faster than the standard transmission path A by the combination of the fall gear 39 and the intermediate small gear 44, and the rotation of the gear shifting intermediate shaft 43 is changed to the intermediate large gear 45. Is transmitted to the input gear 47 on the transmission side via the reaper section 4 and the reaper section output pulley 56 in the same manner as described above.
Is output to. Therefore, the mowing unit 4 speeds up not only the lug rotation-type pulling device 6 but also the scraping device scraping device 19, the stocker side grain culm transport device 22, the tip side grain culm transport device 23, and the like. And harvest the lodging grain culms smoothly and surely.

In the above case, since the moving (raising) speed of the pulling lug 8 of the lug turning type pulling device 6 becomes fast, the grain culm is raised, but the lug turning type pulling device 6 rotates in the longitudinal direction in the horizontal axis. The pair of upper and lower gears (not shown) cause the raising lug 8 to rotate in a direction intersecting with the machine traveling direction to raise the grain culm, so that the raising and separating in the vertical direction parallel to the machine traveling direction. The grass may not be enough and the grain culm may be conveyed with the front side tangled, but the left and right sides of the mowing section 4 and the raising lug 8 are folded to move downward in the case 7. Since the lug rotation type weeding device 10 is provided on the non-acting side of the raising device 6, the weeding lug 15 is provided by the gear 12 and the gear 13 which rotate the horizontal axis of the lug rotation type weeding device 10 in the left-right direction.
Since it rotates in parallel with the direction of travel of the machine, it also cultivates grain culms entwined in the vertical direction and raises them.

Thus, the reaper section frame 57 of the reaper section 4
A transmission shaft 67 is provided on the upper frame 60 of the
Since the sliding engagement member 76 is slidably provided at the end of the auxiliary gear holder, the transmission gear 77 is provided in a loosely fitted state to form the auxiliary weeding pulling on / off clutch 75, the reaper section transmission 3
When the 0 clutch 40 is turned on, the motor 7 automatically
9 is operated and the shifter 78 turns on the auxiliary weeding pulling on / off clutch 75. Therefore, operability is improved. In this case, if the fall clutch 40 of the harvesting section transmission device 30 is configured to be turned on and off by a switch attached to the main transmission lever of the HST transmission mechanism 38 (main transmission device), the operation becomes easier. Therefore, if a lug pull-up load detecting device 82 for detecting the load of the turning of the pull-up lug 8 is provided in the rotation transmission path from the mowing section input pulley 64 to the lug-rotating pull-up device 6, the pull-up load detecting device 82 is provided. The load detection device 82 accurately detects the load applied to the pulling-up of the lug rotation type pulling device 6, and the load mode is set to the fall mode.
When the load is reduced and the auxiliary weeding pull-in / off clutch 75 is turned on, the lodging clutch 40 and the auxiliary weeding pull-in / off clutch 75 can be turned off, and the standard clutch 42 can be turned on. Not only is it improved, but the load applied to the pull-up lug 8 of the lug-rotating pull-up device 6 can be detected accurately.

However, if the working speed of the mowing unit 4 becomes faster than a predetermined speed, it may adversely affect the work speed. Therefore, when the rotation of the output shaft 53 reaches a predetermined rotation speed, the engine side input clutch 50 is automatically operated. The constant rotation of the engine 34 is transmitted from the switching clutch shaft 46 to the output shaft 53 via the gears 55 and 54 by the constant speed transmission path C from the engine 34 to the output shaft 53. Therefore, the working speed of the mowing unit 4 is kept constant. The configurations of the mowing section transmission device 30 and the auxiliary weeding pull-in / out clutch 75, the clutches 40, 42, 4
Combination of 8 and 50 to turn on and off, mission case 31
The relationship with the sub-transmission device, the control order, and the like are arbitrary.

[0019]

EFFECTS OF THE INVENTION The present invention provides a threshing device 3 provided at an upper position, a fixed type grass body 5 provided at a front position, a lug rotation type pulling device 6 provided at the rear of the grass body 5, and the pulling device. 6 has a hair clipper type cutting blade 21 provided at the rear part of the combine harvester, and a grain culm cut by the cutting blade 21 is supplied to the threshing device 3 to thresh, and a lug rotation is performed in front of the fixed type grass body 5. The weeding device 10 is provided, and the weeding lug 15 of the weeding device 10 does not normally rotate, but is rotated by receiving power transmission when it is switched to the lodging mode. Since it is a rotating device for rugs, in the operation of lodging grain culm cutting, the working speed of the mowing section is increased relative to the traveling speed to ensure smooth operation, and the lug rotating type weeding device efficiently handles the lodging grain culm. Divide and defeat by rotating only when switching to lodging mode. Since the absence culms constitute almost not to act, the effect of improving operability.

[Brief description of drawings]

FIG. 1 is a side view of a combine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of a main part.

FIG. 4 is a block diagram illustrating an outline of the present invention.

FIG. 5 is a schematic view of a reaping unit transmission.

FIG. 6 is a cross-sectional view of the mowing frame.

FIG. 7 is a plan view of an essential part.

FIG. 8 is a sectional view of a main part.

FIG. 9 is a circuit diagram.

FIG. 10 is a hydraulic circuit diagram.

FIG. 11 is a circuit diagram of another embodiment.

FIG. 12 is a flow chart of Pitatomaru (registered trademark) automatic control.

FIG. 13 is a perspective view of the operation lever.

FIG. 14 is a hydraulic circuit diagram of the same.

FIG. 15 is a hydraulic circuit diagram of the same.

FIG. 16 is a circuit diagram of the same.

FIG. 17 is an explanatory diagram of the same.

[Explanation of symbols]

1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ...
Mowing part, 5 ... Fixed type grass body, 6 ... Lug rotation type pulling device,
7 ... Case, 8 ... Pulling lug, 10 ... Lug rotation type weeding device, 11 ... Case, 12, 13 ... Gear, 14 ... Endless chain, 15 ... Weeding rug, 19 ... Scraping device, 20 ... Star wheel , 21 ... cutting blades, 22 ... stock side grain culm conveying device, 23 ...
Tip side grain culm transporting device, 24 ... Strain former side grain culm transfer device,
25 ... Tip side transfer device, 26 ... Rear side focusing device, 27
... grain culm supply / conveyance device, 28 ... handling cylinder, 30 ... mowing section transmission, 31 ... mission case, 32 ... HST motor, 3
3 ... HST pump, 34 ... Engine, 35 ... Axle, 36
... output shaft, 37 ... input shaft, 39 ... fall gear, 40 ... fall clutch, 41 ... standard gear, 42 ... standard clutch, 43 ... shifting intermediate shaft, 44 ... intermediate small gear, 45 ... intermediate large Gears, 46 ... Switching clutch shaft, 47 ... Mission side input gear, 48 ... Mission side input clutch, 49 ... Engine side input gear, 50 ... Engine side input clutch, 5
3 ... Output shaft, 54, 55 ... Gear, 56 ... Mowing section output pulley, 57 ... Mowing section frame, 58 ... Lower frame, 59
... Side frame, 60 ... Upper frame, 61 ... Support pipe, 62 ... Horizontal cylinder, 63 ... Mowing up / down cylinder, 64 ... Mowing section input pulley, 65 ... Transmission shaft, 66 ... Transmission shaft, 67 ... Transmission shaft, 68, 69 ... Support member, 70, 71 ... Support tube, 7
2, 73 ... Transmission shaft, 75 ... Auxiliary shunt pull-in / off clutch,
76 ... Sliding engagement member, 77 ... Transmission gear, 78 ... Shifter,
79 ... Motor, 80 ... Gear, 81 ... Chain, 82 ... Induction load detection device, 83 ... Mowing clutch, 84 ... Threshing clutch, 85 ... Mowing / disengaging clutch operating lever, 86 ... Intermediate shaft, 8
7 ... Intermediate gear group, 88 ... Intermediate transmission shaft, 89 ... Output pulley to threshing unit.

[Procedure amendment]

[Submission date] February 23, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] Figure 8

[Correction method] Change

[Correction content]

[Figure 8]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

[Fig. 13]

Claims (1)

[Claims] 1. A threshing device 3 provided at an upper position, a fixed type grass body 5 provided at a front position, a lug rotation type pulling device 6 provided at the rear of the grass body 5, and the pulling device 6. In a combine having a hair clipper-type cutting blade 21 provided at a rear portion and supplying the grain culm cut by the cutting blade 21 to the threshing device 3 to thresh, a lug rotation type is provided in front of the fixed grass body 5. The weeding lug 15 of the combiner is provided with a weeding device 10, and the weeding lug 15 of the weeding device 10 does not normally rotate, but is rotated by receiving power transmission when switched to the lodging mode. Rotating device.