JP2003038005A - Agricultural implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that since in the conventional agricultural implement, the transmission part of an implement device against the ground is deviated in left or right one side relative to the center of left and right of the implement device against the ground, therefore the center of gravity of the implement device against the ground deviates to left or right one side, and each of left and right loads acting to left and right mechanisms for up and down movement become different, the up and down moving mechanisms in left and right hardly move smoothly, and as a result there is a fear that it becomes impossible for the implement device against the ground to work appropriately against the ground, unless the up and down-driving means is positioned at the side where the center of gravity of the whole implement device against the ground is deviated. SOLUTION: In this agricultural implement installing the implement device against the ground driven for working the ground toward a traveling vehicle as up and down movable by the up and down moving mechanisms 7, 7 in left and right, the implement is provided by arranging the up and down moving mechanisms 7, 7 in left and right by distributing them to left and right each other relative to the center of left and right of the implement device against the ground, also installing the transmission part 73 at the side of the implement device moving up and down by deviating to one of the sides relative to the center of left and right of the implement device against the ground, and installing an up and down driving means 82 for moving the implement device against the ground up and down at the deviated side of the transmission part 73.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work machine equipped with a ground work device for working on the ground by driving.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 11-89316, a ground work device for driving a ground to work on the ground is provided, and a seedling plant for performing work different from the ground work device. A second ground work device, which is an attached part, is provided so as to be vertically movable with respect to the traveling vehicle body, while the ground work device is configured to vertically move from the second ground work device through the left and right vertical movement mechanisms. The mechanism is arranged so as to be laterally distributed relative to the left-right center of the ground work device, and the transmission portion is displaced to the left-right center (left side) with respect to the left-right center of the ground work device while moving up and down. A vertical drive means for vertically moving the ground work device, which is opposite to the side of the left and right vertical movement mechanisms on which the transmission portion is displaced (right side).
There is an agricultural work machine that is placed close to the vertical movement mechanism.

[0003]

SUMMARY OF THE INVENTION In the above-mentioned conventional agricultural working machine, since the transmission portion of the ground working device is deviated to one of the left and right sides with respect to the left and right center of the ground working device, the whole ground working device is provided. Since the center of gravity is deviated to the left or right side, the load acting on the left and right vertical movement mechanisms is different, it is difficult for both the left and right vertical movement mechanisms to operate smoothly, and the center of gravity of the ground work equipment as a whole is deviated to the side deviated Without the dynamic drive means, the ground work device may not be able to properly work on the ground.

[0004]

The present invention is intended to solve the above-mentioned problems, and the structure of the present invention is as follows. That is, in the invention according to claim 1, the ground work device 4 that drives to work on the ground is provided with the left and right vertical movement mechanisms 7,
In the agricultural work machine provided so as to be vertically movable with respect to the traveling vehicle body 7 by the right and left vertical movement mechanisms 7 and 7,
Of the ground working device 4 and the grounding work device 4 side which moves up and down, the transmission part 73 is provided so as to be offset to the left and right sides with respect to the left and right center of the ground working device 4. A vertical working drive means 82 for moving the working device 4 up and down is arranged on the side where the transmission portion 73 is displaced.

Therefore, in the agricultural working machine according to the first aspect of the present invention, the left and right up-and-down moving mechanism is operated by the up-and-down motion driving means to set the ground work device to a desired ground height, and the machine body is moved by the traveling vehicle body. Work is performed on the ground by driving the ground work device by transmission through the section. By operating the left and right vertical movement mechanisms, it is possible to change the ground height of the ground work device and change the working state on the ground. The vertical movement drive means drives in the left-right direction on the transmission side of the ground work device, that is, on the side where the center of gravity of the ground work device deviates, and its driving force moves up and down in accordance with the deviation of the center of gravity of the ground work device. It can be transmitted to the mechanism in good balance, and the left and right vertical movement mechanisms can be operated smoothly.

In the invention according to claim 2, a second ground work device 3 for performing a work different from that of the ground work device 4 is provided so as to be movable up and down with respect to the traveling vehicle body 2. Ground working device 4 via left and right vertical movement mechanisms 7, 7.
The agricultural working machine according to claim 1, wherein the farming machine moves up and down.

Therefore, in the agricultural working machine according to the second aspect of the present invention, the second working device is moved up and down with respect to the traveling vehicle body to set a desired ground height, and the up-and-down drive means operates the left and right up-and-down moving mechanisms. Then, the ground work device is set to a desired ground height, and while the machine body is traveling by the traveling vehicle body, the ground work device is driven by being transmitted through the transmission section and driven by the ground work device and the second ground work device. Work on. Then, by operating the left and right vertical movement mechanisms, it is possible to change the ground height of the ground work device with respect to the second ground work device and change the working state of the ground work device on the ground. The vertical movement drive means drives in the left-right direction on the transmission side of the ground work device, that is, on the side where the center of gravity of the ground work device deviates, and its driving force moves up and down in accordance with the deviation of the center of gravity of the ground work device. It can be transmitted to the mechanism in a well-balanced manner, the left and right vertical movement mechanisms can be operated together smoothly, and the relative vertical positional relationship between the ground working device and the second ground working device can be favorably maintained. Further, by vertically moving the second work device with respect to the traveling vehicle body, it is possible to make both the ground work device and the second ground work device have an appropriate ground height without changing the relative vertical positional relationship. it can.

[0008]

As described above, in the agricultural working machine according to the first aspect of the present invention, since the left and right vertical movement mechanisms can be operated smoothly, the ground work device can properly work on the ground.

Further, in the agricultural working machine according to the second aspect of the present invention, the relative vertical positional relationship between the ground working device and the second ground working device can be favorably maintained, so that a plurality of ground works can be simultaneously and appropriately performed. it can. Further, since it is possible to make both the ground work device and the second ground work device have an appropriate ground height without changing the relative vertical positional relationship, it is possible to further optimize a plurality of ground works. it can.

[0010]

1 shows a riding type rice transplanter 1 which is a type of agricultural working machine. This riding type rice transplanter 1 is mainly composed of a traveling vehicle body 2, a 6-row seedling planting section 3, and a plowing device 4 provided in front of the seedling planting section 3, which is a kind of ground working device. To be done. This riding type rice transplanter 1
Is equipped with a hydraulic lifting cylinder 5 through which a seedling planting section 3 can be lifted and lowered via a lifting link mechanism 6 provided at the rear of the traveling vehicle body 2, and a parallel link mechanism 7 is provided on the front side of the seedling planting section 3. The plowing device 4 is attached via the device 7. The lifting link mechanism 6 is composed of one upper link 6a and two left and right lower links 6b, 6b. The upper link 6a and the lower links 6b, 6b are the traveling vehicle body 2 and the seedling planting section 3. The base frame 8 is pivotally attached to the base frame. The rod portion of the hydraulic lifting cylinder 5 is attached to an arm 6d that integrally rotates around the upper link 6a and a rotating shaft 6c on the traveling vehicle side.

An engine 9, which is a drive source, is provided substantially in the center of the traveling vehicle body 2, and two output plugs on the left side of the engine 9 are provided.
Auxiliary transmission 1 from one side of the transmission 10 via a transmission belt 11.
2 is transmitted to the inside of the mission case 13 provided with a main clutch capable of disengaging the transmission from the auxiliary transmission device 12, and the pair of left and right front wheels 14, 14 is transmitted by the transmission from the mission case 13. Is driven, and the left and right rear wheel transmission shafts 15, 15 are transmitted by the transmission from the transmission case 13.
A pair of left and right rear wheels 17, 17 is driven via 15 and the left and right rear wheel transmission cases 16, 16. The auxiliary transmission 12 is a belt-type continuously variable transmission. Further, the seedling planting section 3 is driven through a planting transmission shaft 18 which is driven by the power from the mission case 13. The planting transmission shaft 18 is provided so as to pass through the right side of the engine 9, and a planting clutch case that enables the turning on and off of the seedling planting unit 3 is provided in the middle of the planting transmission shaft 18. -A soot (not shown) is provided.

Further, power is transmitted from the other of the two output pulleys 10 of the engine 9 into the plowing drive counter case 21 through the transmission belt 20, and the plowing drive counter case 21 outputs power. The plowing device 4 is driven by power through the plowing transmission shaft 22. The transmission belt 20 is provided with a tension pulley 23, and the tension pulley 23 acts and does not act to allow the plowing device 4 to be turned on and off. still,
The tension pulley 23 is attached to a tension pulley 23b that rotates around a rotation shaft 23a, and is attached to the transmission belt 20 side by a tension pulley spring 23c that is hung on the arm 23b. It is a biased structure.

A pilot seat 24 is provided substantially in the front, rear, left and right centers of the traveling vehicle body 2. A steering handle 26 is provided on the bonnet portion 25 in front of the cockpit 24, and a main gear shift operation is performed on the left side of the steering handle 26 to change the transmission in the transmission case 13 to perform a gear change operation including forward / reverse switching. A lever 28 is provided. On the right side of the cockpit 24, a sub-shift lever 27 that can perform a shift operation of the sub-transmission device 12, and the raising and lowering of the seedling planting section 3 by operating the hydraulic lift cylinder 5 and the planting clutch case. There is provided a planting / elevation lever 29 capable of turning on / off the drive of the seedling planting section 3 by operating.

On the left side of the bonnet portion 25, the main clutch pedal 30 for operating the main clutch in the mission case 13 and the tension pulley for turning on / off the drive of the tiller 4 are provided. A plowing clutch pedal 31 for operating 23 is provided. When the plowing clutch pedal 31 is stepped on, the plowing clutch pedal connecting wire 31a is pulled, and the tension primer 23b.
Is rotated in a direction (downward direction) in which the tension pulley 23 retracts from the transmission belt 20 to retract the tension pulley 23, and the transmission by the transmission belt 20 is cut off. The plowing clutch pedal 31 can be fixed in the depressed state.

To the right of the bonnet portion 25, left and right brake pedals 32, 32 for braking the left and right rear wheels 17, 17 are provided. The seedling planting section 3 is mainly composed of a seedling placing table 41, a planting transmission section 42 and a seedling planting device 43 of each row, and is input to the planting transmission section 42 via the planting transmission shaft 18. It is designed to work. The seedling planting devices 43, ... Of each row are operated by the power from the planting transmission section 42 to plant the seedlings on the seedling placing table 41 one by one in the field. In addition, the base frame 8 of the seedling planting section 3 attached to the rear end of the lifting link mechanism 6.
The left and right rolling shafts 44 fixed to the
Is fitted to the planting transmission case 42a, and the seedling planting portion 3 can be rolled in the left-right direction with respect to the traveling vehicle body 2. Incidentally, between the left and right support frames 45, 45 attached to the planted transmission case 42a of the planted transmission section 42 and the base frame 8, a left and right balance set to an appropriate load. The springs 46, 46 are provided, and the seedling planting section 3
Is able to follow the field scene by rolling left and right with respect to the traveling vehicle body 2. Further, the lower links 6b, 6b on the right side of the lifting link mechanism 6 and the left and right support frames 45,
Rolling lock springs 48, 48 having a larger load than the balance springs 46, 46 are provided between the left and right frames 47, 47 fixed to the 45, respectively. By 48, the left and right rolling of the seedling planting portion 3 with respect to the traveling vehicle body 2 is restricted in a state where the elevating link mechanism 6 is operated so that the seedling planting portion 3 is at the highest position.

In the lower part of the seedling planting section 3, 2 in the center.
The center floats 49, 49 and the side floats 50, 50 on both sides are provided.
9,49,50,50 is the structure which glides in the field scene.
These floats 49, 49, 50, 50 are
It is provided rotatably in the up-down direction around a left-right pivot shaft 51 ... The two center floats 49, 49 are connected at the front portions of the floats 49, 49 by a connecting frame 52 so that the vertical angle of attack (vertical rotation angle) is the same with respect to the field scene. It is configured. The float 4 is provided on the upper side of the front part of the center float 49, 49.
An interception angle sensor 49a for detecting the interception angles of 9, 49 is provided. In a planting state in which the seedling planting section 3 is lowered, the hydraulic lifting cylinder 5 is operated based on the detection of the angle of attack sensor 49a, and the seedling planting section 3 is moved to a predetermined height with respect to the field scene. It is supposed to be maintained.

Left and right pivotal shafts 51 ... Of the floats 49, 49, 50, 50 are provided in the vicinity of the seedling planting device 43 ... And these pivotal shafts 51 ... It is provided at the same position. The pivot shafts 51 ... Are vertically adjustable by operating a planting depth adjusting lever (not shown) provided in front of the seedling placing table 41.

Further, the seedling planting devices 43 ... Are attached to the rear part of the planting transmission part 42 and are operated by the power from the planting transmission part 42. The seedling placing table 4
The upper part 1 is supported by the left and right seedling placing table supporting rollers 53, 53 and the lower part by left and right moving guide plates 54 so as to be movable left and right, and the seedling placing table left and right moving rods are driven by the power from the planting transmission section 42. By moving 55 to the left and right, it moves left and right.
The left and right seedling table support rollers 53, 53 are attached to the upper portions of the respective left and right support frames 45, 45 fixed to the planting transmission case 42a of the planting transmission section 42. It is composed. By moving the seedling placing table 41 left and right,
The mat-shaped seedlings are scraped off by the seedling planting device 43 ... one by one. The left and right movement guide plates 54 are provided with seedling scraping openings 54a, which are seedling taking-out portions through which the seedling planting devices 43 take out seedlings. Further, the seedling placing table 41 has a well-known configuration in which mat-shaped seedlings are sequentially transferred to the seedling planting device side along the seedling placing table 41 by the seedling feeding belts 56 of each row at the left and right movement ends.

On the left and right sides of the seedling planting section 3, left and right line drawing markers 57, 57 are provided. These line drawing markers 57 and 57 scratch and delineate the soil at the position at the left and right center of the traveling path of the aircraft for the next stroke in the planting work, and mark the soil for the progress of the aircraft for the next stroke. Markers 59, 59 that rotate about the front-rear rotation shafts 58, 58, and wire drawing portions 60, 60 at the tips of the markers 59, 59. The left and right marker arms 59, 59 are connected to the rod portion 5a of the hydraulic lifting cylinder 5 by the marker operating wires 61, 61, and the hydraulic lifting cylinder 5 raises the seedling planting portion 3. Then, the wires 61, 61 are pulled and the wire-drawing acting portions 60, 60 are rotated so as to be lifted away from the ground to be in an upright state. Conversely, the hydraulic lifting cylinder 5 lowers the seedling planting portion 3 to make contact with the ground. Then, the wires 61, 61 are returned, and the wire drawing action parts 60, 60 are lowered and rotated by the springs 62, 62 for urging the wire drawing parts 60, 60 in the direction of contact with the ground to be in a collapsed state. In addition, electromagnetic solenoid pins 63 and 63 for restricting the return of the wires 61 and 61 are provided on the left and right sides of the wires 61 and 61, respectively, so that either one of the left and right electromagnetic solenoid pins 63 acts. When the raising / lowering link sensor 65 for detecting the rotation of the raising / lowering link mechanism 6 detects the raising operation of the seedling planting unit 3 while being controlled by the control unit 64, the electromagnetic solenoid pin 63 that acts by the control unit 64 is detected. , 63 is switched left and right. Therefore, with the seedling planting unit 3 grounded, the wire drawing marker 57 on the unplanted side is rotated downward to lower the wire drawing action unit 60 to bring it into the wire drawing state, and the body turns at the edge of the field. At the same time, the electromagnetic solenoid pins 63, 63 acting by raising the seedling planting part 3 are switched between left and right, and by swiveling, the wire drawing marker is only on the unplanted side, which is the opposite side of the machine to the previous stroke. This is a configuration in which 57 is rotated downward to draw the wire. The support frames 45, 45 of the seedling planting section 3 have wire drawing markers 57, 5 respectively.
Hooks 66, 66 for locking 7 are provided, and a wire drawing marker is used for planting work on the ridges of the field or in hard fields where the soil is not plowed. When drawing cannot be done with the power 57, 57, etc.
When the wire drawing by the car 57, 57 is not necessary, the operator locks the wire drawing markers 57, 57 on the hooks 66, 66 to remove the wire drawing markers 57, 57 regardless of the operation of the wires 61, 61. It is possible to prevent downward rotation. A wire marker 57 is attached to the hooks 66, 66.
When the wire drawing markers 57, 57 do not rotate downward even though the seedling planting portion 3 is lowered, such as when 57 is locked, the descending operation of the seedling planting portion 3 by the lifting link sensor 65 is performed. At the time of detection, the marker sensors 67, 67 provided on the rotating portions of the wire-drawing markers 57, 57 detect that the wire-drawing markers 57, 57 do not rotate downward, and the control unit 64 outputs them to the voice alarm device 68. Then, a voice alarm "No line marker is out" is issued.

By the way, a front seedling placing table 69 is provided at the front of the traveling vehicle body 2. The operator supplies the seedlings placed on the preliminary seedling placing table 69 to the seedling placing table 41. The tilling device 4 is provided in front of the seedling planting section 3 and extends to the left and right, and a support pipe 71 and the support pipe 7 are provided.
1 and the supporting rod 72 extending downward from both ends.
At the position on the left side of the left and right center of the machine body of the support pipe 71, a vertically long plowing transmission case 73 that is transmitted from the plowing transmission shaft 22 is attached and fixed.
The left and right plowing drive shafts 74 are provided on the left and right sides, respectively.
The opposite side of the support rod 72 is supported by the lower portion of each support rod 72. A plowing claw 75 is attached to the front of the seedling planting device 43 of each row, which is a total of 6 rows, through a disc 76 fixed to the plowing drive shaft 74, to advance the machine body. By rotating the plowing drive shaft 74, that is, the plowing claw 75, the plowing field is plunged in front of the seedling planting devices 43 ,. Therefore, the plowing device 4 includes the seedling planting positions PL1 to PL of the seedling planting devices 43 ...
It is a partial tilling device that tills the front of 6 in a streak shape for 6 rows as a whole. The partial tilling device 4 is adapted to be operated when performing a planting operation in an uncultivated field, that is, when performing a planting operation by the no-tillage transplanting method. In addition, between the plowing claws 75 of the respective rows, an idling roller 78 is idling with respect to the plowing drive shaft 74 outside the idling roller support disk 77 that rotates integrally with the plowing drive shaft 74. It is provided to do so. Further, on the upper side and the rear side of the tilling claw 75, the cover 7 which is integral with all the sections for preventing the soil scratched by the tilling claw 75 from scattering to the outside of the tilling position.
9 is provided.

The plowing device 4 is composed of an upper link 7a and a lower link 7b, each extending in the front direction from the planting transmission case 42a of the planting transmission unit 42 of the seedling planting unit 3 in parallel. A support pipe 71 is connected to the front ends of the link mechanisms 7 and 7 and is supported by the seedling planting section 3. still,
The parallel link mechanisms 7 and 7 are provided symmetrically with respect to the left-right center of the machine body at the same position in left and right side views. Therefore, by vertically rotating the parallel link mechanisms 7, 7, the plowing device 4 moves vertically while maintaining the same posture with respect to the seedling planting section 3. Near the left and right support frames 45 of the seedling placing table 41 of the seedling planting section 3,
Vertical movement support frames 47, 47 with planted transmission case 42a
To the front side, and a motor 82 for vertically moving the tilling device is attached to the front part of the left and right vertically moving support frame 47. An intermediate gear 84 meshes with a pinion gear 83 that rotates integrally with the output shaft of the tiller vertical movement motor 82, and a sector gear 85 meshes with the intermediate gear 84. Between the left and right vertical movement support frames 81, 81, a vertical movement rotating shaft 86 rotatably supported by the frames 81, 81 is extended in the left-right direction. Drive shaft 86
When the fan-shaped gear 85 rotates, it rotates integrally with the gear 85. Then, between the left and right vertical movement support frames 81, 81 and the parallel link mechanisms 7, 7 in the left-right direction, triangular vertical movement plates 87, 87 are attached to the vertical movement rotary shaft 86. It is provided to rotate integrally. The vertical moving plates 87, 87 are
The support pipe 71 of the tiller 4 is connected to the left and right by links 88, 88 in the vertical direction. The link 88 on the right side is provided with a turnbuckle 89 so that the link length can be changed. An air damper 81 for biasing the right vertical moving plate 87 upward is provided between the right vertical moving plate 87 and the planting transmission case 42a of the seedling planting section 3. We have installed this air damper
By 89, the upper motive power of the left side parallel link mechanism 7 and the right side parallel link mechanism 7 which move up and down by the plowing apparatus vertical movement motor 82 are balanced, and the plowing apparatus 4 is set with respect to the seedling planting section 3. The left and right sides are kept parallel. The monitor part 90 provided in the upper part of the bonnet part 25 in front of the cockpit 24 is provided with a plowing device vertical movement switch 91. When the switch 91 is operated to "up", the plowing device vertical movement motor 8 is provided.
2 drives the tilling device 4 to rise and the switch 9
When 1 is operated to "lower", the motor 82 for vertical movement of the tiller
Drive the plowing device 4 to lower it. The plowing device vertical movement motor 82 is a motor capable of rotating in the normal and reverse directions.

Therefore, the link angle of the parallel link mechanisms 7 and 7 can be adjusted by operating the tilling device vertical movement switch 91.
Thus, the height of the tilling device 4 with respect to the seedling planting portion 3 can be adjusted. And this riding type rice transplanter 1
By raising the plowing device 4 to the non-grounded state by operating the plowing device vertical movement switch 91, rice planting work can be performed without performing partial plowing work at the same time.

When the tiller 4 is lowered by operating the tiller raising / lowering switch 91 to "down", the marker markers 67, 67 do not cause the wire-drawing markers 57, 57 to rotate downward. Even if "is detected", the control unit 64 does not issue a voice alarm "No line marker is out". As a result, when the planting work is performed while the plowing device 4 is lowered to perform the partial plowing work in a field that is not plowing, the hooks 66 and 66 are provided with wire drawing markers 57, 5 and 5.
7 is locked to prevent the wire drawing from being performed, but unnecessary alarms for the wire drawing markers 57, 57 are not issued so that the unnecessary alarm does not disturb the operator. When this unnecessary alarm is issued, the alarm is issued every time the seedling planting section 3 is lowered, which is troublesome in planting work.

By the way, the lower link 6b on the left side of the elevating link mechanism 6 for elevating the seedling planting section 3 is connected to the elevating link connecting wire 1 substantially perpendicular to the link angle of the lower link 6b.
01 is attached. This wire for connecting the lifting link 1
The other end of 01 is attached to the tension primer 23b. Therefore, when the raising / lowering link mechanism 6 raises the seedling planting section 3 from the grounded state to the non-grounded state as much as possible, the raising / lowering link connecting wire 101 is pulled and the tension pulley 23b is transmitted by the tension pulley 23. The tension pulley 23 is retracted by rotating the belt 20 in the direction of retreating from the belt 20 (downward) so that the transmission of the transmission belt 20 to the tiller 4 is interrupted.

Similarly, the vertical moving plate 87 on the left side, which is interlocked with the vertical movement of the tilling device 4, is connected to the vertical moving plate connecting wire 102 in substantially the same direction as the rotating direction of the plate 87.
The other end of the vertical movement plate connecting wire 102 is attached to the tension primer 23b. Therefore, when the plowing device 4 is moved upward as much as possible from the grounded state to the non-grounded state by the parallel link mechanisms 7, 7, the vertical movement plate connecting wire 102 is pulled and the tension boom 23b is tensioned. -L2
3 is rotated in a direction (downward) retracting from the transmission belt 20 to retract the tension pulley 23, and the transmission belt 2
The transmission to the tiller 4 by 0 is cut off.

Therefore, when either the seedling planting section 3 or the tilling device 4 is raised to a position where it is in a non-grounded state, the transmission to the tilling device 4 is cut off. As described above, the agricultural work machine that is the riding type rice transplanter 1 is configured such that the ground work device that is the plowing device 4 can be moved up and down with respect to the seedling planting unit 3 by the vertical movement mechanism that is the parallel link mechanism 7, 7. In addition, the ground work device 4 and the second ground work device that is the seedling planting section 3 are configured to be able to move up and down with respect to the traveling vehicle body 2 by the lifting link mechanism 6 and are not grounded. When the tilling device 4 is raised to the non-grounded state by the parallel link mechanisms 7, 7 or the lifting link mechanism 6, the ground work device, that is, the driving of the tiller device 4 is stopped. It is not driven. In other words, the ground work device 4 is not driven unless it is in the grounded state.
Further, as long as the main clutch pedal 30 or the plowing clutch pedal 31 is not depressed, the plowing device 4 is reliably driven in the grounded state.

Further, the parallel link mechanisms 7 and 7 serving as left and right vertical movement mechanisms are arranged so as to be laterally separated from each other with respect to the left and right center of the tiller 4, and the tiller serving as a transmission portion is provided on the tiller 4 side. The transmission case 73 is provided so as to be offset to the left with respect to the left-right center of the plowing device 4, and the plowing device vertical movement motor 82 serving as the vertical movement driving means for vertically moving the plowing device 4 is provided in parallel to the left and right. The plowing power transmission case 7 of the link mechanisms 7, 7.
3 is arranged on the side deviated, that is, on the left side, and provided with a seedling planting section 3 which is a second ground work device for performing a different work from the tilling device 4 so as to be movable up and down with respect to the traveling vehicle body 2. The plowing device 4 is vertically moved from the portion 3 via the parallel link mechanisms 7, 7.

Therefore, the plowing device 4 which is the first pair of ground working devices is moved up and down with respect to the seedling planting part 3 which is the second ground working device by the parallel link mechanisms 7 and 7 so that the seedling planting part 3 and The relative vertical positional relationship with the tiller 4 can be changed, and the seedling planting section 3 can be set to an appropriate depth in the tiller groove obtained by the tiller 4 plowing the field in a streak pattern. The seedling planting device can be used to plant seedlings, and the seedlings can be grown well after planting. Good ground work. Further, the elevation link mechanism 6 simultaneously elevates and lowers the plurality of ground work devices of the seedling planting section 3 and the tiller 4 with respect to the traveling vehicle body, so that the height changes due to the unevenness or inclination of the field scene and the traveling vehicle body 2 Even if there is a change in posture, the relative height of the seedling planting unit 3 and the tilling device 4 can be maintained at the appropriate height for the field without changing the relative vertical position. It is possible to perform a plurality of ground work at an appropriate ground height while appropriately maintaining the vertical positional relationship between the planting unit 3 and the tiller 4. Moreover, even if any of the parallel link mechanisms 7 and 7 and the elevating link mechanism 6 is operated to float the plowing device 4 in the air to bring it into a non-grounded state, the driving of the plowing device 4 is stopped. The seedling planting section 3 is used when the vehicle is traveling on the road with the seedling planting section 3 and the tiller 4 being raised.
And other obstacles such as the rear wheels 17, 17 of the traveling vehicle body 2 with the tilling claws 75 ... Plowing for an operator who interferes with or maintains the planting transmission part 42 of the seedling planting part 3 in the vicinity of the plowing device 4 in a state where the seedling planting part 3 and the plowing device 4 are raised. Plowing claw 75 of device 4 ...
It is possible to prevent the drive from causing harm. Furthermore, when performing the conventional seedling planting work by operating only the seedling planting section 3 with only the tilling device 4 in the non-grounded state by the parallel link mechanism 7, 7, that is, only the ground work by the second ground working device is performed. At this time, since the plowing device 4 does not operate, the driving of the plowing device 4 does not generate an air flow around the plowing device 4. Therefore, this air flow does not cause a mud flow or water flow in the field, and the mud flow or water flow causes the planted seedlings to fall or the center floats 49, 49 to operate improperly such as frequent up and down movements. It prevents that the detection value of the angle of attack sensor 49a of the floats 49, 49 becomes improper and the desired planting depth of the plant is not achieved by the planting section 3, thereby adversely affecting the planting work. can do.

Conventionally, as disclosed in Japanese Unexamined Patent Publication No. 10-127109, in an agricultural working machine provided with a ground working device such as a substitute device in front of a seedling planting part, both the seedling planting part and the ground working device are lifted and lowered. When the ground working device is brought into the non-grounded state by the lifting mechanism, the ground working device may not be driven, but when only the ground working device is raised to the non-grounded state, it is not driven in conjunction with this. If the worker forgets to stop the ground work device, the ground work device may be driven unnecessarily, resulting in a loss of power or a bad influence on the seedling planting work.

In this embodiment, as a kind of ground working device, the no-tillage provided with the partial tilling device 4 constituted by the tilling claws 75 for plowing the front of the seedling planting position in a streak shape. Although the rice transplanter has been described in detail, it may be a simultaneous paddy rice transplanter provided with a scraping device that is provided with a scraping rotor that scrapes the front side of the seedling planting position as a ground working device. Also,
Instead of the seedling planting part 3 of this embodiment, a no-tillage seeding machine provided with a direct sowing device or a simultaneous squid seeding device provided with a snipping device for scraping the front side of the seeding position of the direct seeding device may be used.

FIG. 8 shows a structure in which, in place of the plowing device 4, a leveling device 110 for leveling the front of the center float 49 is provided. In addition, this center float 49
It is a single float. The ground leveling device 110 is provided with a plurality of grounding plates 113 arranged in a spiral shape on the outer peripheral surface of a grounding drum 112 that rotates integrally with a drive shaft 111 in the left-right direction. Sending in the left-right direction, while suppressing the sending of mud or water to the center float 49, the soil in front of the float 49 is well leveled to stabilize the detection of the angle of attack of the float 49 by the center float 49, The raising and lowering of the seedling planting section 3 is stabilized. The crushed soil plates 113 ... Are arc-shaped projections protruding from the leveling drum 112. A transmission case 114 for driving the leveling drum 112 is provided on one of the left and right sides of the leveling drum 112.
The bearing 115 of the drive shaft 111 is provided on the other side.
A regulation plate 116 is provided between the leveling drum 112 and the center float 49 so that a mud flow or a water flow generated from the leveling drum 112 is not sent to the center float 49.
Is provided. Conventionally, there is a ground leveling device that levels ground by a leveling drum having a spiral protrusion, but if there is a hard soil mass, the effect of crushing soil may be insufficient and land leveling may not be performed well. However, since the soil leveling device shown in FIG. 8 can increase the effect of crushing soil while sending mud or water in the left-right direction, good leveling work can be performed.

[Brief description of drawings]

FIG. 1 is a side view of a riding type rice transplanter.

FIG. 2 is a plan view of a riding type rice transplanter.

FIG. 3 is a schematic plan view of essential parts showing a tilling device and a seedling planting part.

FIG. 4 is a side view showing a tilling device and a seedling planting section.

FIG. 5 is a diagram showing an operating configuration of a drawing marker.

FIG. 6 is a plan view showing a parallel link mechanism.

FIG. 7 is a side view showing a structure of turning on and off the drive of the tilling device.

FIG. 8 is a schematic plan view of essential parts showing a soil leveling device and a seedling planting section.

[Explanation of symbols]

1 ... Riding type rice transplanter (agricultural work machine), 2 ... Traveling car body, 3 ...
Seedling planting part (second ground working device), 4 ... Plowing device (ground working device), 6 ... Elevating link mechanism, 7 ... Parallel link mechanism (vertical movement mechanism), 73 ... Plowing transmission case (transmission part) , 8
2 ... Motor for vertical movement of tilling device (vertical movement drive means)

Claims (2)

[Claims] 1. An agricultural work machine in which a ground work device 4 for driving work on the ground is vertically movable with respect to a traveling vehicle body 2 by means of left and right vertical movement mechanisms 7, 7. 7 are arranged so as to be laterally separated from each other with respect to the left-right center of the ground working device 4, and the transmission portion 73 is biased to one side with respect to the left-right center of the ground working device 4 on the side of the ground working device 4 which moves up and down. An agricultural working machine characterized in that a vertical movement driving means 82 for vertically moving the ground working device 4 is disposed on the side where the transmission portion 73 is displaced. 2. A second ground working device 3 for performing a work different from that of the ground working device 4 is provided so as to be vertically movable with respect to the traveling vehicle body 2, and a vertical moving mechanism 7 for moving left and right from the second ground working device 3.
2. The agricultural work machine according to claim 1, wherein the ground work device 4 is configured to move up and down via 7.