JPH08187003A - Tillage device - Google Patents

Abstract

PURPOSE: To provide a tillage device capable of performing high speed tillage work and preventing the enlargement of non-tillage part and the increase of tillage load by shifting the tillage pitch to match the running speed of a tractor even in the case of its high speed running with the running speed changed or engine speed increased in a tractor. CONSTITUTION: The tillage device has a tillage rotary working machine 14 attached on a tractor in a freely liftable manner. The tillage device is provided with a high speed tillage switch 76 for allowing the rotary working machine 14 to perform high speed tillage motion and a controller 79 for shifting tillage pitch by changing driving speed of the rotary working machine 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilling device for pulling a tilling rotary working machine for tilling work by a tractor.

[0002]

2. Description of the Related Art Conventionally, a tilling rotary working machine is installed on the rear side of a tractor so as to be able to move up and down, and this rotary working machine is used to perform the tilling work. However, the tractor traveling speed during the tilling work is increased to perform the work as quickly as possible. It was hoped to end.

[0003]

In the above-mentioned prior art, the efficiency of tilling work can be improved by increasing the traveling speed. However, when the traveling speed of the tractor is changed to a higher speed, the driving speed of the rotary working machine is increased. When it becomes relatively slow, the tilling pitch becomes large, and there is a problem that the amount of remaining tillage increases, and when the engine speed of the tractor is increased to run at high speed, the rotary work machine drive speed increases and the tilling load increases. Defect occurs.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a high speed tilling switch for high speed tilling operation of a tilling rotary working machine and a tilling rotary working machine in a tilling device for vertically mounting a tilling rotary working machine on a tractor. With a controller that changes the drive speed of the tractor to change the tilling pitch, even when the tractor travels at high speeds by operating the tractor's traveling speed change operation or increasing the engine speed.
High-speed tilling work can be performed with the tilling pitch suitable for the traveling speed of the tractor, and it is possible to easily prevent the amount of residual tillage and the tilling load from increasing, improving the high-speed tilling function and the handling operability. It can be easily planned.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a side view of the entire tilling control circuit, FIG. 2 is a side view of the whole, FIG. 3 is a plan view of the same, and FIG. 4 is a side view of the rotary working machine section. In the figure, (1) is a tractor, and left and right front running wheels (4) and (4) are installed on both sides of a bonnet (3) in which an engine (2) is installed, and a steering handle is provided at the rear of the bonnet (3). (5) is provided, the driver's seat (6) is installed behind the steering wheel (5), and the left and right rear running wheels (7) and (7) are installed outside both sides of the driver's seat (6). (6) Dispose the left and right brake pedals (9) and (9) and the clutch pedal (10) in the front step (8),
The worker is configured to sit on the driver's seat (6) and travel.

Further, a tillage rotary working machine (1) is mounted on a mission case (11) for driving the traveling wheels (4) and (7) via a lower link (12) and a top link (13).
4) is attached and the working machine (14) is mounted on the rear side of the tractor (1) so as to be able to move up and down.
5), a position control lever (16) for manually raising and lowering the working machine (14), and an up-and-down switch (17) for raising and lowering the working machine (14) to a non-work raising position and a plowing work lowering position by one-touch operation. ) Is arranged on the right side of the driver's seat (6), and the auxiliary traveling speed change lever (18) and the PTO speed change lever (19) for changing the output to the working machine (14) are installed in the driver's seat (6). Place it on the left side.

Further, as shown in FIGS. 4 to 7, an HST case (20) is arranged at the center of the working machine (14),
The power is transmitted from the PTO shaft (21) of the tractor (1), the beams (22) are projected to both sides from the side surface of the HST case (20), and the support plates (23) are provided at the midpoints of the beams (22). Is fixed, the lower link (12) is connected to the front end of the support plate (23), the front end of the depth frame (24) is pivotally supported at the rear end of the support plate (23), and the depth frame (24) Left and right tail wheels (25) (25) are provided on the rear end side.

An upper part of the chain case (26) and an upper part of the side support (27) are fixed to the outer end of the beam (22), and the plow shaft (28) is provided between the lower part of the chain case (26) and the lower part of the side support (27). ) Is horizontally installed, and a large number of rotary claws (29), which are nata claws, are radially planted on the plowing claw shaft (28) in a side view, and the upper part of the rotary claw (29) is rotated. Rotary cover (3
0) and both sides are covered by side covers (31). And the plow shaft (28) is HS
Output of T case (20), transmission shaft in beam (22),
Driven through the sprocket and the chain in the chain case (26), the rotary pawls (29) are rotated to allow cultivating, and the rotating operation of the handle (32) causes the axis of the cultivating pawl shaft (28) to move. The rotary cover (30) can be rotated back and forth around the center.

Then, a plate (33) fixed to the beam (22) is provided so as to project forward, and the plate (33) is provided.
A support rod (34) is horizontally mounted on the front end, and a mounting plate (35) is fixed to the support rod (34).
The upper part of the cutting blade (36) is fixed to 5). In addition,
Four cutting blades (36) are attached to the outer side of the lower link (12) in the left-right width direction, and the middle portion of the cutting blade (36) is curved backward and inclined forward and backward.
The linear lower part of 6) is made to incline rearward in the front part of the rotation locus of the rotary claw (29). That is, the lower part of the cutting blade (36) is arranged so as to overlap with the front part of the rotational trajectory of the rotary claw (29) in a side view, and the cutting blade (36) and the rotary claw (2 adjacent to the cutting blade (36) are arranged.
The space in 9) in the left-right direction is narrowed to prevent residual cultivation. However, the outer two cutting blades (36) (36) are provided between the rotary claw (29) and the eccentric claw (37). A partition plate (38) is arranged between the rear surface of the cutting blade (36) and the rotary cover (30). That is, the partition plate (38) is fixed to the back surface of the cutting blade (36),
The partition plate (38) is brought close to the rotary cover (30) so that straw, weeds, etc. do not get in and get entangled. Further, the partition plate (38) is formed in a triangular shape, the upper side of which fits the inner shape of the rotary cover (30) and the front side of which fits closely to the shape of the rear surface of the cutting blade (36). The rear side is arcuate and has a shape that guides straw and the like downward. And the partition plate (3
The width (plate thickness) of 8) is made narrower than the width of the cutting blade (36),
I try not to get entangled with straw and weeds.

Further, the rear end of the rotary cover (30) above the rotary claw (29) is connected with a first steel plate rear cover (40) through a first fulcrum shaft (39) so as to be swingable in the vertical direction. 1 The rear end of the rubber second rear cover (41) is fixed to the rear end of the rear cover (40), and the flattened space (4
The front end of the third rear cover (43) made of a steel plate is fixed to the rear end of the second rear cover (41) forming (2), and the second fulcrum shaft (44) and the third rear cover (at the rear end of the first rear cover (40) are fixed. 43) The third fulcrum shaft (45) at the front end is connected by a pair of left and right links (46) (46), and a fourth fulcrum shaft (47) is provided substantially coaxially with the third fulcrum shaft (45).
The lower end of the first suspension rod (48) is connected to the fourth fulcrum shaft (47), and the pair of left and right second suspension rods (50) is connected to the fifth fulcrum shaft (49) at the rear end of the third rear cover (43). The lower ends are connected to each other, and the upper ends of the first and second suspension rods (48) (50) are attached to the support body (51) of the first rear cover (40) so that the suspension rods (48) (50) can be moved up and down. And a third rear cover (43) form a side view triangle, and the second, third and fifth fulcrum shafts (44) (45) (49).
A side view triangle is formed by a line connecting the two fulcrums, and the third rear cover (43) is moved upward about the second fulcrum shaft (44) or the third fulcrum shaft (45) to move the second fulcrum shaft (4
4) and suspension rods (48) (50) of the support (51)
A third rear cover (the forward movement of which is restricted by downward bulging of each rod (48) (50) by the operation of both lever mechanisms of the cover (43) and each rod (48) (50) with the connecting portion as a fulcrum. 43) is moved rearward and upward to perform a floating operation in which both sides of the third rear cover (43) move back and forth in plan view. In addition, the fifth fulcrum axis (4
9) and a pair of left and right gas dampers (52) are connected between the support body (51) of the first rear cover (40). A gas damper (52) capable of obtaining a substantially constant spring constant for the entire stroke and forming a large stroke. ), The third rear cover (43) is supported, and even if the tractor (1) is tilted to the left and right, the tilling surface can be leveled by evenly pressing the third rear cover (43) to the left and right.

Further, the upper end side of the suspension rods (48) (50) is loosely fitted and inserted into the bearing bodies (53) of the support bodies (51), and abutted on the upper surface side of the bearing bodies (53). (5
4) are planted in the rods (48) (50) to prevent the rods (48) (50) from being pulled out downwardly, restrict the forward movement of the third rear cover (43), and prevent the springs (55) ( 55) wound with a pair of left and right rods (5
6) The lower end of (56) is connected to the upper surface of the first rear cover (40), and the upper end of the rod (56) is attached to the rotary cover (3).
No. 0) is slidably attached to the support body (57) and the first rear cover (40) is elastically pressed downward by the spring (55).

A rake support body (58) is detachably fixed to the upper surface of the third rear cover (43), and a rake (59) fixed to the support body (58) extends behind the third rear cover (43). A support body (51) to which the second suspension rod (50) upper end side is attached while being extended.
The upper end of the gas damper (52) is connected to the shaft (60) of the second damper, the second suspension rod (50) and the gas damper (52) are provided as close to each other as possible and substantially parallel to each other, and after the depth frame (24). A pair of left and right tail wheels (25) (25) are attached to the ends through a support frame (61), and left and right tail wheels (2
5) The rake (59) is arranged between the (25), and the tail wheel (25) prevents the rake (59) from colliding with a ridge or the like at the time of heading direction change, and while traveling on the road or The tail wheel (25) is also used as a bumper on the left and right outside of the rake (59) for maintenance work such as lifting up.

Furthermore, the first fulcrum shaft (39) is attached at a position substantially the same as or higher than the upper end of the rotary locus of the rotary claw (29), and the rear cover is centered on the first fulcrum shaft (39) during the plowing work. As (40), (41) and (43) rise, a large-area equalizing space (42) is formed below the rear covers (40), (41) and (43) behind the rotary locus of the rotary pawl (29). Rear cover (40) (4
1) (43) pushes the soil forward with rotary claws (2
9) Prevents reaching the soil flip-up part and increases the tilling load of the rotary claw (29) due to the plowing work at high speed. During the plowing work, the rotary claw (29) is pulled out to the ground. The rear covers (40), (41) and (43) are lifted by the cultivated soil and arranged on an arc line having a radius centered on the point (A) at which the rotary claw (29) rotates about 50% or more of its area. Leveled space (42)
The rotary claw (29) rotation locus rear side and rear cover (4
0) (41) (43), small pieces such as fine or light clods are scattered by the rotary claws (29) to a high position on the lower surface of the rotary covers (40) (41), resulting in large clods or heavy clods. Alternatively, large pieces such as stumps (rice plants) are scattered to a lower position by the rotary claws (29), and the small pieces are in the upper layer and the large pieces are in the lower layer due to the specific gravity separating action due to the scattering of the rotary claws (29).
The small objects in the upper layer are leveled by the rear covers (41) and (43), and the large objects are pushed further downward by the rear rake (59). Therefore, the air permeability and water permeability of the large soil can be maintained well by the large soil, and the surface layer of the soil can be formed by the small soil in a state suitable for sowing or seedling transplantation.

Further, four rotary pawls (29) are arranged at intervals of 90 degrees on the same circumference with the cultivating pawl shaft (28) as the center.
Are attached, and the front ends of the rotary claws (29) are alternately bent in the left-right direction, and the rotary claws (29) are arranged in a row of four on the plane orthogonal to the plow claw shafts (28). ) A plurality of rows are provided in the axial center line direction, and a gap is provided between the tip loci of the rotary pawls (29) (29) facing each other in the left-right direction, and the left and right lateral bending widths of the rotary pawls (29) are set to about the tip locus gap. It is twice the size, and the rotary pawl (2
9) (29) The rotary claw (29) is formed so that the base end interval is about 5 times larger than the tip locus clearance. Further, the rotary claw (29) is curved in a scooping shape after the soil is cut off, and the horizontal component force of the curved tip of the rotary claw (29) pushes the soil laterally and the rotary claw (29). ) By the lateral repulsive force of elastic deformation, the scooping soil is extruded in a lateral direction substantially parallel to the axis of the tilling claw shaft (28),
Left and right rotary claws (29) (29) The structure that crushes the soil in the gap of the tip locus of the tip locus to prevent the residual plow from being formed.
Percentage of rotary pawls (29) ... are attached, the rotational speed of the rotary pawls (29) is made substantially the same as the conventional rotational speed (about 200 to 400 rotations per minute), and the traveling speed of the tractor (1) is conventional. Traveling speed (about 0.5 per second
It is about twice as much as the meter), and the working efficiency is about twice as much as that in the conventional case without increasing the tilling load, so that the tilling work can be performed. In addition, the rotary claw (2
The cutting blade (36) is thrust into the soil at a position overlapping with the soil plunging point of 9) in a side view, and the soil plunging portion of the cutting blade (36) is obliquely supported rearward, and the cutting blade (36). ) The left and right surfaces of the cutting blade (36) are formed as flat planes having a width, and the pulling force causes the cutting blade (36) to enter the soil downwardly, and the soil to be cut presses the cutting blade (36) side surface due to the restoring force. But,
The reaction force of the inrush resistance generated by the removal resistance of the cutting blade (36) is approximately equal to or slightly larger than the reaction force of the inrush resistance of the rotary claw (29). This prevents the entire tillage rotary working machine (14) from being lifted upward, and the rotary claw (29) is configured to reduce the impact generated by the plunge into the soil. In addition, on the rear side of the tillage claw shaft (28), a reaction force (lifting force) of the leveling force of the rear covers (40) (41) (43).
A reaction force of the withdrawal force of the rotary claw (29) is generated in opposition to and the balance of each reaction force stabilizes the tilling posture.

Further, FIG. 8 is a traveling drive system diagram of the tractor (1), and a main transmission gear group (63) and P for transmitting the output of the engine (2) through the main clutch (62).
TO shift gear group (64), forward / reverse switching gear group (65) provided at the input stage of the main shift gear group (63), and auxiliary shift gear group (66) provided at the output stage of the main shift gear group (63) When,
Left and right front running wheels (4) via the front wheel gear group (67)
The front wheel drive shaft (68) for transmitting the shift output to (4) and the left and right rear running wheels (7) and (7) via the rear differential mechanism (69).
And a rear wheel drive shaft (70) for transmitting the shift output to. The front and rear traveling wheels (4) and (7) are driven via the gear groups (63) (65) (66) and the drive shafts (68) (70). Further, a forward rotation gear (71), a reverse rotation gear (72) and a forward / reverse switching gear (73) are provided at the input stage of the PTO transmission gear group (64), and the forward rotation and reverse rotation gears (71) (72) are provided. A forward / reverse switching solenoid (74) for meshing the switching gear (73) is provided on one of the two, and the rotary pawl (29) is normally rotated under the control of the solenoid (74) to perform plowing work.
In addition, the rotary claws (29) are reversed to remove the attached straw and mud. Further, the PTO output of the PTO speed change gear group (64) is transmitted to the tillage claw shaft (28) through the HST case (20) in which the hydraulic continuously variable transmission is installed, and the rotational speed of the rotary claw (29) is transmitted. It is configured such that the tilling pitch (T1) (T2) of the rotary pawl (29) is changed so as to have a continuously variable speed and a large tilling pitch (T1) shown in FIG. 9 to a small tilling pitch (T2) shown in FIG. are doing.

As shown in FIG. 11, a hydraulic continuously variable transmission (75) is provided in place of the PTO transmission gear group (64) shown in FIG. 8, and the hydraulic continuously variable transmission (75) shifts the PTO driving force. Forward / reverse switching is performed to transmit the PTO output of the hydraulic continuously variable transmission (75) from the PTO shaft (21) to the tillage pawl shaft (28) to continuously change the rotational speed of the rotary pawl (29) and also to rotate the rotary pawl (29). It is also possible to rotate the claw (29) forward or backward.

Further, as shown in FIG. 1, a high-speed tilling switch (76) for automatically performing each operation of raising the rotary working machine (14) and lowering the engine (2) when turning in a field headland, The forward / reverse automatic switch (77) that automatically reverses the rotation of the rotary pawl (29) when the rotary working machine (14) is raised to the non-working position, and the rotary working machine (14) via the lower link (12). A hydraulic lift (78) having a hydraulic lifting valve for lifting and lowering
An HST case (2) having the elevating switch (17), a forward / reverse switching solenoid (74), a speed change motor and the like.
0) is connected to a tilling controller (79) composed of a microcomputer, and the rotary pawl of the rotary working machine (14) is interlocked with an operation of raising the tilling rotary working machine (14) to a non-tilling working position. (29) is automatically rotated in the reverse direction, and when the field headland is reached, the rotary work machine (14) is raised to the non-tilling work position to automatically reverse the rotary pawl (29). It is rotated to separate and drop the straw grass and the mud wound around the rotary claw (29), and at the same time, the rotary claw (29)
The automatic reverse rotation control is performed only when the number of revolutions of the engine (2) is less than or equal to a predetermined value, and it is configured to prevent the straw and the mud that fall off by the reverse rotation of the rotary pawl (29) from scattering around. .

Further, a variable resistor type tilling pitch dial (80) for performing a continuously variable operation of the HST case (20) by a manual adjustment of an operator and a load change of the engine (2) or the tilling claw shaft (28). A torque meter type load sensor (81) for detecting the load and a piezoelectric capacitor type soil sensor (82) for detecting the amount of the rear running wheel (7) sinking in the field soil are connected to the tilling controller (79), By the manual adjustment output of the dial (80) or by the load sensor (8
Based on the load detection result of 1) or the soil sensor (8
Based on the field hardness detection result of 2), the HST case (2
0) Controls the hydraulic continuously variable transmission to change the rotation speed of the tiller claw shaft (28) and change the tiller pitch (T1) (T2) of the rotary claw (29). In a cultivating device for vertically mounting a cultivating rotary working machine (14), a high speed cultivating switch (76) for cultivating the cultivating rotary working machine (14) at a high speed and a drive speed of the cultivating rotary working machine (14) are changed. By providing a tilling controller (79) for changing the tilling pitch to allow the tractor (1) to travel at high speed by the traveling speed change operation of the tractor (1) or the engine (2) rotation speed increasing operation,
The tilling pitch suitable for the traveling speed of the tractor (1) enables high-speed tilling work, and is configured so as to eliminate the conventional problems such as a large amount of residual tillage and a large tilling load.

Furthermore, as shown in the flow chart of FIG. 12, in the high-speed tillage automatic state in which the high-speed tillage switch (76) is turned on, the engine (2) runs at maximum speed at a high speed (a running speed of about 1.0 meter per second). ), When the tractor (1) reaches the headland of the field and the up / down switch (17) is raised, the hydraulic lift (78) is operated to operate the rotary working machine (14).
The work implement ascending operation to lift the machine to the non-tiled work position, and the accelerator lever or electronic governor (not shown)
The engine (2) rotation speed lowering operation for reducing the rotation speed of the engine (2) by about 30% is performed by operating the above.

When the normal / reverse rotation automatic switch (77) is turned on, the engine (2) is rotated below a predetermined speed, and the rotary working machine (14) is operated to rise for a certain period of time. Then, when it is lifted to the non-tiling work position, the forward rotation gear (71) is turned off by the control of the forward / reverse rotation switching solenoid (74) to stop the tilling claw shaft (28), and after a certain period of time, the rotary claw is stopped. After (29) is completely stopped, the reverse rotation gear (72) is turned on by the control of the forward / reverse rotation switching solenoid (74) to perform the reverse rotation operation of the tilling pawl shaft (28), and after a certain period of time, the rotary pawl (29) is rotated. ), The reverse gear (72) is turned off by the control of the forward / reverse switching solenoid (74), and the tilling pawl shaft (28) is stopped and stands by.

Further, in the forward / reverse automatic state, the engine (2)
After turning at a predetermined rotation or less, after turning by turning in the field headland,
When the rotary working machine (14) is lowered by the lowering operation of the elevating switch (17) and the reversing gear shaft (28) is rotating in the reverse direction, the reversing gear (72) is turned off.
8) After a lapse of a certain time after the stop operation is performed, the forward rotation operation of the tilling pawl shaft (28) for turning on the forward rotation gear (71) is automatically performed, and the accelerator lever or the electronic governor is controlled. The engine (2) rotation return operation for automatically returning the rotation speed of the engine (2) to the original value is performed, and the tilling work in the next process is started.

Further, the engine (2) is rotated at a high speed to run at a high speed, and high-speed tilling work is performed, so that when the tilling pitch change is instructed by adjusting the tilling pitch dial (80), the HST case (20) is turned off. The speed change gear operates to change the rotation of the tiller claw shaft (28) and continuously change the tiller pitch (T1) (T2) of the rotary claw (29). Further, when the tilling work load of the load sensor (81) is detected, the continuously variable transmission of the HST case (20) is activated to change the rotation of the tiller claw shaft (28), and the rotary claw (29).
The tilling pitches (T1) and (T2) are continuously changed to keep the tilling work load within a predetermined range. Soil sensor (82)
According to the field hardness detection, the continuously variable transmission of the HST case (20) is operated to change the rotation of the tiller claw shaft (28), and the tiller pitch (T1) (T2) of the rotary claw (29) is steplessly changed. When the field is soft and the soil is soft, the plowing pitch (T1) (T2) of the rotary claw (29) is made small, and for example, the driving force of the rotary claw (29) may be small, but clay that is likely to become a large lump Rotate nails (29) when crushing soft soil into small pieces and when the field is hard soil
The plowing pitches (T1) and (T2) are increased, and for example, sandy hard soil, which easily collapses but requires a large driving force of the rotary claw (29), is cultivated by the low-rotation rotary claw (29), and the load is increased. Increase or damage to the rotary pawl (29).

[0023]

As is apparent from the above embodiments, the present invention is a cultivating device in which a cultivating rotary working machine (14) is movably mounted on a tractor (1), and the cultivating rotary working machine (14) is rapidly cultivated. A high speed tilling switch (76) to be operated and a controller (79) for changing the tilling pitch by changing the driving speed of the tilling rotary working machine (14).
Even if the tractor (1) is made to travel at high speed by the traveling speed change operation of the tractor (1) or the operation of increasing the engine (2) rotation speed, the plowing pitch suitable for the traveling speed of the tractor (1) provides high speed. It is possible to perform plowing work, easily prevent an increase in residual plowing, and an increase in plowing load, and easily improve the high-speed plowing function and the handling operability.

[Brief description of drawings]

FIG. 1 is a tilling control circuit diagram.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of the tillage rotary working machine.

FIG. 5 is a side view of a rotary pawl portion.

FIG. 6 is a plan view of a rear cover.

FIG. 7 is a rear view of the rotary claw portion.

FIG. 8 is a plan view showing a drive system.

FIG. 9 is an explanatory view showing a plowing path of a rotary claw.

FIG. 10 is an explanatory diagram of the same.

FIG. 11 is a plan view showing a modified example of FIG.

FIG. 12 is a flowchart of FIG.

[Explanation of symbols]

 (1) Tractor (2) Engine (14) Tillage rotary work machine (76) High-speed tillage switch (79) Tillage controller

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Osamu Nakagawa 1-32, Chayamachi, Kita-ku, Osaka, Yanmar Agricultural Machinery Co., Ltd. Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Akihiko Kitabayashi 1-1-1 Ishishiba, Matsumoto City, Nagano Prefecture Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Akihiko Maezawa Ishishiba Matsumoto City, Nagano Prefecture 1-1-1 Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Plant (72) Inventor Shin Fujisawa 1-11-1 Ishishiba Matsumoto City, Nagano Prefecture Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Plant (72) Inventor Masa Miyamoto Hiko 1-1-1 Ishishiba, Matsumoto-shi, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto factory (72) Inventor Koji Hiroshi 1-1-1 Ishishiba, Matsumoto-shi, Nagano Prefecture Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto Factory (72) Inventor Hideki Kamiyama 1-32 Chayamachi, Kita-ku, Osaka City Yanmar Diesel Co., Ltd.

Claims (1)

[Claims] 1. A cultivating device in which a cultivating rotary working machine is mounted on a tractor so that the cultivating rotary working machine can be moved up and down. A tilling device characterized by being provided with a controller for changing.