JP2517912Y2 - Transplant machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transplanter equipped with, for example, a vertical hydraulic cylinder for raising and lowering a planting part and a horizontal hydraulic cylinder for tilting the planting part to the left and right.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 53-29627, there has been a technique in which hydraulic switching valves for controlling vertical and horizontal hydraulic cylinders are provided in parallel in the same hydraulic pump.

[0003]

In the above prior art, since a single relief valve is shared by the vertical and horizontal hydraulic cylinders, the hydraulic pressure suitable for the oil passage of each hydraulic cylinder can be easily set. The pressure resistance of the oil passage structure becomes excessive,
There is a problem that oil leakage is likely to occur due to insufficient pressure resistance, and it is not possible to easily maintain the function of each hydraulic cylinder and reduce the manufacturing cost of the hydraulic circuit. In addition, when the horizontal hydraulic cylinder operates when moving the planting part by raising it such as traveling on the road or changing direction in the headland of the field, the aircraft tends to lean to the left or right due to the horizontal tilting of the planting part being raised. However, if the operation of the horizontal hydraulic cylinder is restricted, the operating speed of the vertical hydraulic cylinder changes, and the planting part is likely to be raised higher than necessary.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a transplanter equipped with a vertical hydraulic cylinder for raising and lowering a planting part and a horizontal hydraulic cylinder for tilting the planting part left and right.
A flow divider for independently driving each of the hydraulic cylinders connected to the same hydraulic pump is provided.A vertical relief valve is provided between the hydraulic switching valve for controlling the vertical hydraulic cylinder and the flow divider, and a horizontal hydraulic pressure is provided. A horizontal relief valve is provided between the hydraulic switching valve that controls the cylinder and the flow divider, and the operating hydraulic pressures of the vertical and horizontal hydraulic cylinders are set individually by the vertical and horizontal relief valves, respectively. the hydraulic unit case to provide a hydraulic selector valve for the hydraulic cylinders controlling the vertical, when the oil pressure switching valve for the hydraulic cylinders controlling the horizontal to the pipe connection co
The hydraulic switching valve for controlling the horizontal hydraulic cylinder is
Since a lock mechanism that mechanically suspends the operation of the oil tank is provided, it is possible to easily supply the optimum hydraulic pressure to the vertical and horizontal hydraulic cylinders from the same hydraulic pump. It is possible to easily prevent oil leakage due to over-pressure structure and insufficient pressure resistance, and correct the inclination of the planting part by the horizontal hydraulic cylinder at the optimum hydraulic pressure. Can be easily moved up and down to keep the planting depth of the seedlings substantially constant, and the hydraulic cylinder and hydraulic switching valve for horizontal control can be removed to reduce the manufacturing cost or replace the hydraulic switching valve. The specifications for improving the horizontal control function can be easily changed, the function of supporting the planting part and the manufacturing cost of hydraulic circuit parts can be easily reduced, and the lock mechanism allows the hydraulic switching valve for controlling the horizontal hydraulic cylinder. Work of When the planting part is lifted and moved, the horizontal rolling of the aircraft due to the operation of the horizontal hydraulic cylinder can be easily prevented, and the vertical hydraulic cylinder operation is limited due to the limitation of the horizontal hydraulic cylinder operation. Can be easily prevented from changing, and the hydraulic unit case
A lock mechanism is installed separately from the mechanical
The hydraulic circuit is used to prevent oil
The structure can be simplified easily, and the operation method and mounting
It is possible to easily construct a lock mechanism with few position restrictions .

[0005]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory view of a main part, FIG. 2 is a side view of a walking rice transplanter, FIG. 3 is a plan view of the same, and FIG.
(2) is a transmission case, (3) is a planting case connected to the transmission case (2) via a transmission case (4), and (5) is the engine (1) and each case (2).
(3) A bonnet covering the upper side of the rice transplanting machine constituted by (4), (6) is a spare seedling mounting table provided on the rear upper surface of the bonnet (5), and (7) is connected to the planting case (3). A steering handle, (8) is a low-back and high-high seedling mounting table which is slidably reciprocally slidable left and right via guide rails (9) and (10) above the handle (7), and (11) is the planting plant. A transverse feed shaft attached to the attached case (3) to drive the seedling table (8) in a lateral direction, and (12) is attached to the planting case (3) via a planting arm (13) to mount the seedling platform (8). (8) a pair of right and left paddy wheels that are supported on the mission case (2) so as to be able to move up and down via a swing case (15); Put left and right swing rods (17) and (17) on the swing cases (15) and (15). And left and right and connected to the paddy field wheel (1
4) A vertical hydraulic cylinder for vertically moving the rice transplanter by controlling (14) to move in and out, and (18) is the engine (1).
And in each case (2) (3) (4) lower front link (1
9) and a leveling float for planting rice field leveling which is supported via a planting depth lever (20), and (21) is the planting claw (1)
2) A pitching sensor for detecting the elevation of the front part of the float (18) due to a change in the planting depth of the seedling, and (22) are arranged on the rear sides of the float (18) behind the paddy wheel (14). This is a flat sled plate type rolling sensor that detects the inclination of the rice transplanter in the left-right direction and smooths the road (erasing the wheel marks).

As shown in FIGS. 4 and 5, an engine (1) is connected to and supported by the transmission case (2) via a body frame (23), and the vertical hydraulic cylinder () is mounted on the body frame (23). At the same time, the pitching adjustment cylinder shaft (25) is connected and fixed to the tip of the piston rod (24) of the cylinder (16). Then, the middle of the rolling adjustment shaft (26) is rotatably inserted into the cylindrical shaft (25), and the push and pull directions of the left and right swing rods (17) (17) are reversed by the rotation of the rolling adjustment shaft (26). So that the arm (2
7) Each swing rod (17) (1) through (27)
7) A horizontal hydraulic cylinder (28) that connects the tip and corrects the right and left inclination of the rice transplanting machine to keep it approximately horizontal,
The cylinder (28) is attached to the cylinder shaft (25) via a bracket (29), and the piston rod (30) of the cylinder (28) is connected to the rolling adjustment shaft (26) via an arm (31). Under the control of the vertical hydraulic cylinder (16), the shafts (25) and (26) are slidably displaced in the longitudinal direction of the machine body, and the left and right swing rods (1
7) Pushing and pulling (17) in the same direction to raise and lower the rice transplanting machine, keeping the seedling planting depth substantially constant, and rotating the rolling adjustment shaft (26) by controlling the horizontal hydraulic cylinder (28). The left and right swing rods (17) and (17) are pushed and pulled in different directions so that the support heights of the left and right wheels (14) and (14) are different, and the rice transplanter is supported substantially horizontally.

Further, a hydraulic unit case (34) for driving and controlling the vertical hydraulic cylinder (16) is provided, and the unit case (34) is connected to the transmission case (2).
The pitching sensor (21) is connected to the unit case (34) via a connecting rod (35) and links (36) (37) that are fixed to one side of the unit and reduced by a pressing force greater than or equal to a set value. While the pitching sensor (21) detects the vertical movement of the front of the leveling float (18), the vertical hydraulic cylinder (16) is automatically operated,
The pitching sensor (21) is attached to a lifting lever (38) provided on the steering handle (7) via an arm (39).
And the up-and-down hydraulic cylinder (16) is operated by the manual operation of the elevating lever (38).

Next, as shown in FIG. 6, there is provided a rolling sensor arm (41) which sets a lowering lowermost position by a lowering regulation stopper (40), and the left and right rolling sensor arms (41) (41) are provided with right and left rear ends. The rolling sensors (22) (22) are connected and fixed respectively, and the front ends of the left and right rolling sensor arms (41) (41) are independently provided to the bearing body (42) provided on the upper rear side of the transmission case (4). Support rotatably. A rolling hydraulic switching valve (4) for controlling the operation of the horizontal hydraulic cylinder (28).
3), and the switching valve (43) is fixedly mounted on the rear upper side of the transmission case (2) via a base frame (44), and is connected to the base frame (44) via a rolling fulcrum shaft (45). To support the middle of the receiving cylinder (46), swinging the receiving cylinder (46) laterally in the lateral direction of the machine body, and having both ends of a core shaft (47) rotatably inserted in the receiving cylinder (46). A link (4) having a base end fixed to the input link (48) (48) and integrally connected to the rolling sensor arm (41).
9) and the input link (48) are connected by a rod (50), and each member (22) (41) (46) (47)
(48) The (49) is formed symmetrically about the fulcrum shaft (45). A ground holding spring (51) is stretched between the arm (49) and the planting case (3). The left and right rolling sensors (22) and (22) are pressed against the planted rice fields respectively by the symmetrically provided springs (51) and (51), and when the left and right rolling sensors (22) move up and down in the same direction at substantially the same time, Input link (48)
(48) swings around the core shaft (47) to hold the rolling hydraulic pressure switching valve (43) in a neutral position, while the left and right rolling sensors (22) and (22) move in different directions or only one of them moves up and down. Left and right links (49)
Rolling fulcrum shaft (45) due to the difference in the swing amount of (49)
, The receiving cylinder (46) is swung, and the rolling hydraulic switching valve (43) is operated to drive and control the horizontal hydraulic cylinder (28).

Further, the lowering restricting stopper (40) is formed in a U-shape, and the stopper (40) is U-shaped through a bracket (53) on the lower surface of the seedling take-out plate (52) supporting the guide rail (9). Both ends are fixed and the stopper (4
0), the middle of the rolling sensor arm (41) is vertically movably inserted, the lowering of the rolling sensor arm (41) is regulated by a stopper (40), and the pair of left and right rolling sensors (22) is planted ( 3) The bearing body (42) is supported on the rear side of the bearing body (42) so as to be vertically movable independently, and the bearing body (42) is fixed to the upper side of the transmission case (4) via the bracket (54). A bearing body (42) is provided on the front side of the planting case (3) to extend the sensor arm (41) substantially in parallel with the transmission case (4). The lower surface of the rolling sensor (22) is floated evenly. (18) The sensor arm (41) which is held down by the spring (51) so as to be positioned at substantially the same height as the lower surface.
Is controlled by a stopper (40), and the stopper (40) prevents the sensor arm (41) from swinging left and right, thereby limiting the lateral movement of the rolling sensor (22).

As shown in FIGS. 1 and 6, the lower end of the spool arm (55) of the rolling hydraulic pressure switching valve (43) and the middle of the receiving cylinder (46) are connected by a rod (56) to form a rolling fulcrum shaft (45). ), The swing of the receiving cylinder (46) is interlocked via the rod (56) to swing the spool (57) of the switching valve (43) by the swing of the spool arm (55), While the switching valve (43) is operated, a rolling lock mechanism (58) is provided in the switching valve (43) to stop the operation of the switching valve (43). The rolling lock mechanism (58) is provided as close as possible to the spool (57) which is the detection rotation shaft.

The rolling lock mechanism (58) is provided with a fan-shaped cutout (59).
And a rolling lock lever (61) for vertically operating the lock plate (60), and a lower end of a rolling rod (63) inserted vertically into the fixed cylinder (62) so as to be movable up and down. , Its rolling rod (6
3) The fixing pin (64) at the upper end is engaged with the sliding groove (65) at the tip of the lever (61), and the lock plate (60) and the lock lever (61) are interlocked and connected. When performing control, the arc surface (59) above the notch (59)
The lock plate (60) is suspended and supported so that (a) is located above the locking pin (66) fixed to the upper end of the spool arm (55) of the switching valve (43), and the arc surface (59) is supported.
a) On the inner side, the locking pin (66) is rocked together with the spool arm (55) to rotate the spool (55) to operate the switching valve (43), while the rice transplanter is tilted by horizontal control. When it is inconvenient, the lever (61) is swung around the fulcrum shaft (68) against the return spring (67) to pull up the lock plate (60), and sliding surfaces ( 59c) (59c) through the notch (5
9) The locking pin (66) is engaged with the lower locking groove (59d), and the spool arm (55) is forcibly held in a vertical state to prevent the rotation of the spool (57). The switching valve (43) is held at a neutral position.

Further, a lever support plate (61a) for locking the lever (61) in multiple stages is provided, and the lever (6) is provided.
1) The operation amount of the lock plate (60) is adjusted so as to adjust the operation amount of the lock plate (60), and the locking amount of the locking pin (59) in the fan-shaped notch (59) accompanying the swing of the spool arm (55) is adjusted. 6
The swing range of 6) is configured to be restricted.

Further, the planted clutch lever (7) shown in FIG. 2 is connected to the lock lever (61) through a wire (69).
0), the switching valve (43) is held in the neutral position via the rolling lock mechanism (58) by the disengagement clutch operation of the lever (70), and the lever (70) is implanted. The rolling lock mechanism is released by operating the clutch to operate the switching valve (43).

As shown in FIG. 7, the upper and lower hydraulic cylinders (1
6) and a hydraulic pump (71) for pumping hydraulic oil in the transmission case (2) to the horizontal hydraulic cylinder (28);
A flow divider (74) for supplying pressure oil from a hydraulic pump (71) necessary for each of the vertical and horizontal hydraulic cylinders (16) (28) via two throttle valves (72) (73). A pitching hydraulic switching valve (75) for controlling the operation of the vertical hydraulic cylinder (16); and setting between the hydraulic divider valves (43) and (75) for rolling and pitching and the flow divider (74). Each of the pitching and rolling relief valves (76) (77) for short-circuiting the discharge side of the flow divider (74) into the transmission case (2) due to the increase of the circuit hydraulic pressure is provided in the hydraulic unit case (34). Is to be installed internally,
The high pressure oil of the optimum oil amount set by the throttle valves (72) (73) of the flow divider (74) is supplied to each switching valve (75) (4).
3) applied to each cylinder (16) (28) via
The pitching hydraulic switching valve (75) is operated by the pitching sensor (21) and the lifting lever (38) to control the operation of the vertical hydraulic cylinder (16), and the rolling hydraulic switching valve (4) is controlled by the rolling sensors (22) and (22).
3) to operate and control the horizontal hydraulic cylinder (28), while ensuring a high pressure seal between the rolling hydraulic switching valve (43) and the horizontal hydraulic cylinder (28). Valve (78) (7
9) is incorporated, and when the rolling hydraulic switching valve (43) is held at the neutral position by the rolling lock mechanism (58), oil leakage at the neutral position is prevented and the locking is surely performed. Then, in a transplanter provided with a vertical hydraulic cylinder (16) for raising and lowering the planting section and a horizontal hydraulic cylinder (28) for tilting the planting section left and right,
The vertical hydraulic cylinder (1) is provided with a flow divider (74) for independently driving the hydraulic cylinders (16) (28) connected to the same hydraulic pump (71).
6) is provided with a relief valve (76) for up and down between the hydraulic switching valve (75) and the flow divider (74), and the hydraulic switching valve (43) for controlling the horizontal hydraulic cylinder (28) and the above A horizontal relief valve (77) is provided between the flow dividers (74), and the vertical and horizontal relief valves (76) (77) are used to control the vertical and horizontal hydraulic cylinders (16) (28). In the hydraulic unit case (34) in which the operating hydraulic pressure is set separately, and the hydraulic switching valve (75) for controlling the vertical hydraulic cylinder (16) is provided, the hydraulic switching valve (43) for controlling the horizontal hydraulic cylinder (28) is provided. )
Is connected to the pipe.

As shown in FIGS. 8 and 9, a drive belt (82) for transmitting the output of the hydraulic hose (80) (81) for rolling control from the engine (1) to the mission (2) and the belt (82). ) Belt cover (8
3), and are arranged so as to protect the hoses (80) and (81) from muddy water and obstacles.

As shown in FIG. 6, the left and right links (4
9) The spring (51) is pressed against (49) from above.
Left and right rolling sensors (22) (2) against (51)
2) Rolling control regulation arm (8) that lifts and supports
4) and a bracket (8) on the upper side of the transmission case (4).
5) pivotally supporting the regulating arm (84) in the vertical direction through the vertical axis, and connecting the lock lever (61) to the rolling control regulating arm (84) via a wire (86); The regulating arm (84) is moved upward in conjunction with the operation of the hydraulic switching valve (43) of the lever (61) to move the arm (84) to the left and right links (49) (4).
9), left and right rolling sensors (22) (2)
2) is supported so as to be able to move up and down, and the regulating arm (84) is moved down in conjunction with the locking operation of the hydraulic switching valve (43) of the lever (61) to move the arm (84) to the left and right links (49). (49), so that the right and left rolling sensors (22) and (22) are lifted and supported at a position higher than the leveling float (18).

The present embodiment is constructed as described above, and the seedling placing table (8) is reciprocally moved to the left and right, and the seedlings for one strain are sequentially obtained from the seedling placing table (8) by the planting claws (12). It is taken out and planted. By operating the up / down lever (38), the up / down hydraulic cylinder (16) is operated to raise / lower the rice transplanter to change the direction at the edge of the ridge and evenly change the unevenness of the tiller. By raising and lowering the front part of the flat float (18),
The pitching sensor (21) moves up and down to operate the vertical hydraulic cylinder (16), and the seedling mounting table (8) and the planting claw (12)
The planting section provided with such a means moves up and down to keep the contact pressure of the leveling float (18) substantially constant and the planting depth of the planting section to keep the planting depth of the planting claws (12) substantially constant. Let it happen automatically. In addition, the right and left rolling sensors (22) and (22) when the rice transplanting machine body tilts to the left and right due to changes in the unevenness of the tillage, etc.
Is moved up and down in different directions or only one of them, the horizontal hydraulic cylinder (28) is operated, and the planting section including the seedling mounting table (8) and the planting claw (12) is tilted left and right. The horizontal control of the planting section for keeping the rice transplanting machine substantially horizontal with respect to the planting rice field is automatically performed.

During the horizontal control of the rice transplanter body as described above, as shown by the solid line in FIG. 1, the lock lever (61) is set in the horizontal state and the locking pin (6) of the spool arm (55) is set.
6) hangs and supports the lock plate (60) swingably on the inner side of the arc surface (59a), and the rolling sensor (22)
The spool arm (55) is set in a free state so as to interlock with the unevenness detection operation of the tillage by (22), and the rolling hydraulic switching valve (43) is operated by the rotation of the spool (57) based on the detection operation signal. Then, the operation of the horizontal hydraulic cylinder (28) is automatically controlled.

When it is inconvenient for the rice transplanter to tilt due to the horizontal control, such as when the rice transplanter changes its direction at the edge of the ridge and when it runs on the road, as shown by the phantom line in FIG.
When the lock lever (61) is lowered and the lock plate (60) is pulled up, when the spool arm (55) is in the vertical state, that is, when the switching valve (43) is in the neutral position, the locking pin (6) remains as it is.
6) is engaged with the locking groove (59b), and when the spool arm (55) is in an inclined state, that is, when the switching valve (43) is at a position other than the neutral position, the sliding surface (59c) on one side is attached to the sliding surface (59c). Slide the lock pin (66) into contact with the spool arm (5
5) while returning the lock pin (66) to the lock groove (5).
9b) to forcibly hold the rolling oil pressure switching valve (43) in the neutral position, and even if the rolling sensor (22) collides with the centrifugal force at the time of turning or an obstacle, a tilt detecting operation is performed. Even if it goes, the rolling lock mechanism (58) blocks the rotation of the spool (57) to block the operation of the rolling hydraulic switching valve (43), and restricts the operation of the horizontal hydraulic cylinder (28) to control the rice transplanter body. The horizontal control of can be stopped.

The above-mentioned horizontal control stop operation can also be performed by the planted clutch lever (70).
Automatically turns the rolling lock mechanism (5
8) is operated to prevent forgetting to operate the lock mechanism (58), and the operation can be simplified to improve the work efficiency of seedling planting compared to the conventional case.

[0021]

EFFECTS OF THE INVENTION As is clear from the above embodiments, the present invention is a vertical hydraulic cylinder (16) for raising and lowering a planting part.
And a horizontal hydraulic cylinder (2
8) In a transplanter equipped with the same hydraulic pump (71)
A flow divider (74) for independently driving the hydraulic cylinders (16) (28) connected to the hydraulic cylinder (16) and a hydraulic switching valve (75) for controlling the vertical hydraulic cylinder (16) and the flow divider (74). ), And a horizontal relief valve (77) between the hydraulic switching valve (43) for controlling the horizontal hydraulic cylinder (28) and the flow divider (74). Relief valves for up, down, and horizontal (76) (77)
The vertical hydraulic cylinders (16) (2)
In the hydraulic unit case (34), in which the operating hydraulic pressure of 8) is set separately, and the hydraulic switching valve (75) for controlling the hydraulic cylinders (16) for vertical movement is installed, the horizontal hydraulic cylinder (28) is provided.
The control hydraulic switching valve (43) is connected to the pipe ,
Hydraulic switching valve for controlling the horizontal hydraulic cylinder (28)
The operation of the spool (57) of (43) is mechanically stopped.
A lock mechanism (58) for locking the vertical hydraulic cylinder (1) and the horizontal hydraulic cylinder (1) from the same hydraulic pump (71).
6) It is possible to easily supply the respective optimum hydraulic pressures to (28), and it is possible to easily prevent oil leakage due to an excessively high pressure resistance configuration of the oil passage and insufficient pressure resistance, and the horizontal hydraulic cylinder (2
8) Correct the inclination of the planting part by using the hydraulic cylinder (16) for up and down with the optimum hydraulic pressure to easily move the planting part to keep the planting depth of seedlings substantially constant. Further, the horizontal control hydraulic cylinder (28) and the hydraulic switching valve (43) can be removed to reduce the manufacturing cost, or the hydraulic switching valve (43) can be replaced to easily change the specifications for improving the horizontal control function. It is possible to improve the function of supporting the planting portion and reduce the manufacturing cost of the hydraulic circuit parts easily, and at the same time, the lock mechanism (58) controls the hydraulic switching valve for controlling the horizontal hydraulic cylinder (28) ( Four
By suspending the operation of 3), it is possible to easily prevent the body from rolling due to the operation of the horizontal hydraulic cylinder (28) when the planting part is moved up and moved, and further, the horizontal hydraulic cylinder (28) It is possible to easily prevent the movement of the up / down hydraulic cylinder (16) from changing due to the limitation of the operation , and
Lock mechanism separate from the hydraulic unit case (34)
(58) is provided to mechanically provide a horizontal hydraulic cylinder (28)
Since it stops the operation of the
Can be simplified easily , and the operation method and
A lock mechanism (58) with few restrictions on the mounting position can be easily constructed.
It can be done.

[Brief description of drawings]

FIG. 1 is an enlarged explanatory view of an essential part showing an embodiment of the present invention.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a partially enlarged plan view.

FIG. 5 is a side view of the same.

FIG. 6 is a rear view of the same.

FIG. 7 is a hydraulic circuit diagram.

FIG. 8 is a partial side view.

FIG. 9 is a plan view of the same.

[Description of symbols] (16) Vertical hydraulic cylinder (28) Horizontal hydraulic cylinder (34) Hydraulic unit case (43) Horizontal hydraulic switching valve (57) Spool (58) Rolling lock mechanism (71) Hydraulic pump (74) ) Flow divider (75) Vertical hydraulic switching valve (76) Vertical relief valve (77) Horizontal relief valve

Front page continuation (72) Inventor Yoichiro Nishi, 1-32 Chayamachi, Kita-ku, Osaka, Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Hiroyuki Takahashi 1-32 Chayamachi, Kita-ku, Osaka Yanmar (56) References JP-A-57-127106 (JP, A) JP-A-51-57028 (JP, A) JP-A-58-106203 (JP, A) JP-A-60-251810 (JP , A) Actual opening 57-94703 (JP, U) Actual opening 55-171624 (JP, U) Actual opening Sho 56-27386 (JP, U) Actual opening Sho 55-168573 (JP, U) Actual opening Sho 59-23404 (JP, U) Actual opening Sho 55-29194 (JP, U) Actual opening Sho 53-29627 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A transplantation machine comprising a vertical hydraulic cylinder (16) for raising and lowering a planting part and a horizontal hydraulic cylinder (28) for tilting the planting part left and right, wherein the same hydraulic pump (71) is connected. Each hydraulic cylinder (16) (2
8) Independently driving the flow divider (7)
4), a vertical relief valve (76) is provided between the hydraulic switching valve (75) for controlling the vertical hydraulic cylinder (16) and the flow divider (74), and a horizontal hydraulic cylinder (28) is provided. The horizontal relief valve (7) is provided between the hydraulic switching valve (43) to be controlled and the flow divider (74).
7) is provided, and each relief valve (76) for vertical and horizontal
(77) hydraulic cylinders for vertical and horizontal (1
6) The hydraulic pressure for the horizontal hydraulic cylinder (28) is controlled in the hydraulic unit case (34) in which the operating hydraulic pressures of (28) are set separately and the hydraulic switching valve (75) for controlling the vertical hydraulic cylinder (16) is provided. Connect the hydraulic switching valve (43) of
Together with the hydraulic pressure for controlling the horizontal hydraulic cylinder (28)
Mechanical operation of spool (57) of switching valve (43)
A transplanter characterized by being provided with a locking mechanism (58) for stopping .