JP2546791B2 - Transplant machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transplanter for performing horizontal control via a horizontal hydraulic cylinder based on detection of a planting posture of a rolling sensor.

[0002]

2. Description of the Related Art Conventionally, a lateral inclination of a planting portion is detected by a rolling sensor and transmitted to a rolling hydraulic pressure switching valve, and the horizontal hydraulic cylinder is operated by the switching valve to perform horizontal control.

[0003]

SUMMARY OF THE INVENTION In the prior art, it is possible to prevent the control from becoming unstable due to an abrupt control or erroneous control caused by the hydraulic switching valve responding improperly to the rolling sensor operation. In addition to being unable to prevent easily, even when it is not necessary to perform horizontal control, the hydraulic switching valve is easily activated by the rolling sensor detection operation due to forgetting to release it, etc., and it is not possible to easily improve the function of automatic horizontal adjustment. There was a problem.

[0004]

SUMMARY OF THE INVENTION Therefore, according to the present invention, a rolling sensor for detecting the lateral inclination of the planting section and a hydraulic cylinder for correcting the lateral inclination of the planting section are provided to automatically level the planting section. In the transplanter to be adjusted, a neutral return member for returning the rolling sensor to the dead zone position is provided, and the hydraulic cylinder operation by the rolling sensor is limited by the neutral return member. It can be improved to improve the horizontal control characteristics, prevent unnecessary detection of the rolling sensor, prevent malfunctions when the horizontal control is not performed, can perform stable driving operation, and can be handled more easily than before. It is a thing.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a plan view of a main part, FIG. 2 is a side view of the whole, and FIG. 3 is a plan view of the same. In the figure, (1) is an engine, (2) is a mission case, and (3) is the mission case (2). ), A planted case that is connected to the) via a transmission case (4), (5)
Is the engine (1) and each case (2) (3) (4)
The bonnet that covers the upper side of the rice transplanter constructed by
(6) is a spare seedling mounting table provided on the rear upper surface of the bonnet (5), (7) is a steering handle which is continuously provided with the planting case (3), and (8) is an upper side of the handle (7). The front, rear, rear, and high height of the seedling mounting table, which is reciprocally slidably attached to the left and right through the guide rails (9) and (10), and (11) is attached to the planting case (3) to laterally mount the seedling mounting table (8). A lateral feed shaft for feeding drive, (12) is a planting arm (1
A planting claw which is attached via 3) to pick up and plant one seedling of seedling from the seedling mounting table (8), and (14) can be raised and lowered freely through the swing case (15) to the mission case (2). A pair of left and right paddy wheels to support, (16) are left and right swing rods (17) on the swing cases (15) and (15).
Left and right paddy wheels (14) (1) connected via (17)
4) hydraulic cylinders for vertical movement for simultaneously controlling the movement of the rice transplanter by moving in and out, and (18) is the front link (19) and the plant under the engine (1) and the cases (2) (3) (4). A leveling float for planting rice field leveling which is supported via a planting depth lever (20), (21) a front part of the float (18) according to a variation in planting depth of the planting claw (12). A pitching sensor (22) for detecting the rise and fall of the paddle (22) is provided behind the paddy wheel (14) on both sides of the rear part of the float (18) to detect the inclination of the rice transplanter in the left-right direction and to smooth the ruts (wheel erasing). It is a flat sled plate type rolling sensor.

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, there is provided a rolling sensor arm (41) for setting the lowering lowermost position by the lowering regulation stopper (40), and the left and right rolling sensor arms (41) (4) are provided.
Left and right rolling sensors (22) (22) at the rear end are connected and fixed to 1) respectively, and left and right rolling sensor arms (41) (41) are attached to a bearing body (42) provided on the upper rear side of the transmission case (4). ) Support the front ends independently and rotatably. A rolling hydraulic pressure switching valve (43) for controlling the operation of the horizontal hydraulic cylinder (28) is provided, and the switching valve (43) is fixed to the upper rear side of the transmission case (2) via a base frame (44). At the same time, the middle of the receiving cylinder (46) is supported on the base frame (44) via the rolling fulcrum shaft (45), and the receiving cylinder (46) is laid horizontally in the lateral direction of the machine body so as to swing freely. An input link (48) is provided at both ends of a core shaft (47) which is rotatably inserted in a cylinder (46).
(48) A link (49) integrally fixed to the rolling sensor arm (41) and fixedly provided at the base end is connected to the input link (48) by a rod (50), and each member (22) (41) is connected. ) (46) (47) (48) (49) are formed symmetrically about the fulcrum shaft (45), and a ground holding spring (b) is provided between the arm (49) and the planting case (3). 51) tensioned springs (51) installed symmetrically
Left and right rolling sensors (22) (2)
When the left and right rolling sensors (22) are moved up and down in the same direction at the same time while the 2) are pressed against the paddy fields, respectively, the left and right input links (48) (48) move the core shafts (47).
The rolling oil pressure switching valve (43) is held in a neutral position by swinging around the center of the left and right rolling sensors (22) (2).
When 2) moves up and down in different directions or only one of them moves the receiving cylinder (46) around the rolling fulcrum shaft (45) due to the difference in the amount of rocking of the left and right links (49) (49), The rolling hydraulic switching valve (43) is operated to drive and control the horizontal hydraulic cylinder (28).

As shown in FIG. 6, the rolling switching valve (43) has a slide spool (52) for sliding in the axial direction, and an arm (53) and an arm (53) are swingably attached to the operating end of the spool (52). A locking plate which is provided with a pin (54) for connecting one side to the receiving cylinder (46) and is integrally fixed to a rotation fulcrum shaft (55) on the other side of the arm (53). In the guide groove (57) of (56), the pin (5
Insert the bent end of 4) and insert the receiving tube (46) and spool (5
2) is interlocked with each other, and swings the receiving cylinder (46) in the vertical direction through the pin (54) and the locking plate (56).
3), and the arm (5) centering on the fulcrum shaft (55)
The rolling switching valve (43) is operated and controlled by sliding the spool (52) in the axial direction by the horizontal swing of (3).

As shown in FIG. 7, an up / down hydraulic cylinder (1
6) and a hydraulic pump (58) for pumping the hydraulic oil in the mission case (2) to the horizontal hydraulic cylinder (28),
A flow divider (61) for separately supplying pressure oil from the hydraulic pump (58), which is necessary for the vertical and horizontal hydraulic cylinders (16) (28), respectively, through the two throttle valves (59) (60). A rotary type pitching hydraulic pressure switching valve (62) for controlling the operation of the vertical hydraulic cylinder (16), and rolling and pitching hydraulic pressure switching valves (43) (6).
2) and the flow divider (61) are connected to each other, and the flow divider (61) is generated by increasing the circuit oil pressure above a set value.
Relief valves (63) (64) for pitching and rolling that short-circuit the discharge side in the mission case (2)
Are installed in the hydraulic unit case (34) respectively, and the throttle valve (5) of the flow divider (61) is provided.
9) The high-pressure oil of the optimum oil amount set by (60) is passed through each switching valve (62) (43) to each cylinder (16) (2).
8), the pitching sensor (21) and the lifting lever (38) actuate the pitching hydraulic pressure switching valve (62) to control the operation of the vertical hydraulic cylinder (16), while the rolling sensor (22) switches the rolling. The valve (43) is operated to control the operation of the horizontal hydraulic cylinder (28).

As shown in FIG. 1, a neutral arm (65) fixed to the spool (52) tip side of the rolling switching valve (43) and a neutral return member wound on the spool (52) on both sides thereof. Neutral support spring (66) (6
6), the neutral arm (65) and the left and right springs (66) (66) so as to sandwich the washer (67) (6).
7) The scissors members (68) for slidably supporting the tip end side on the spool (52) are provided inside the unit cases (69) fixed to the hydraulic pressure switching valve (43), respectively, and An operating lever (70) for variably adjusting the force of the springs (66) (66) is provided, and the lever (70) and the scissors member (68) are connected via a wire (71). A fulcrum shaft (72) that hangs around the unit case (69) when the wire (71) is loosened.
Scissors member (68) around spring (66) (66)
The neutral arm (65) is held in a free state so as to move to the left and right by force, and the rolling hydraulic switching valve (43) is operated by the left and right sliding of the spool (52), while the lever is moved. When the wire (71) is maximally tensioned by the (70), the scissors member (68) is spring-loaded (66) around the fulcrum shaft (72).
(66) Actuating the switching valve (43) by sliding the spool (52) left and right by holding the neutral arm (65) in the locked state at the neutral position so as to prevent the neutral arm (65) from moving laterally by closing it to the minimum against the force. And the spool (52) when the neutral arm (65) is not in the locked state.
When the arm (65) moves to the left or right due to the sliding of the arm (65), a moving load resistance is given to the arm (65) by the force of the left or right spring (66) (66) to
5) Return the left and right springs (6) to their neutral position.
6) is actuated to cause the rolling switching valve (43) to retain the neutral return characteristic, while adjusting the tension of the wire (71) between the free position of the lever (70) and before the lock position, the scissors member (68). ) Of the rolling sensor (2) by variably adjusting the force of the springs (66) and (66) to increase or decrease the moving load resistance of the spool (52) together with the neutral arm (65).
2) The rolling oil pressure switching valve (43) is made sensitive or insensitive to the detection operation from (22), and the sensor (2
2) The sensitivity of the horizontal automatic control according to (22) is adjustable.

In this structure, the hydraulic switching valve (4
Although the means for separately installing the springs (66) (66) for neutral return is shown in 3), an existing spring center type rolling hydraulic switching valve (43a) as shown in FIG. 7 may be used. Similar effects can be obtained.

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, the up-down hydraulic cylinder (16) operates, and the rice transplanter body moves up and down to keep the grounding pressure of the leveling float (18) substantially constant, so that the planting claw (12) is planted. Keep the depth of contact almost constant. Further, the rice transplanter body is tilted to the left or right due to changes in the unevenness of the cultivator, etc., so that the left and right rolling sensors (22) (22) move in different directions or only one of them moves up and down, and the horizontal hydraulic cylinder (28). Is operated to incline the rice transplanter body to the left and right, and the planting portions such as the seedling table (8) and the planting claws (12) are kept substantially horizontal to the planted rice field.

As described above, the left and right rolling sensors (2
2) When there is a difference in the amount of elevation of (22), the receiving cylinder (46)
Swings up and down around the rolling fulcrum shaft (45), and the vertical swinging of the arm (53) around the fulcrum shaft (55) through the pin (54) and the locking plate (56). The horizontal hydraulic cylinder (28) is automatically controlled, and the horizontal hydraulic cylinder (28) is automatically controlled. Even if (22) and (22) move up and down in the same direction by substantially the same amount, the hydraulic pressure switching valve (43) is supported at the neutral position only by rotating the core shaft (47). Further, the spool (5) is caused by rattling and bending due to an assembly process error of each member between the left and right rolling sensors (22) (22) and the rolling hydraulic pressure switching valve (43).
The sliding of 2) can be easily removed by the spring (66) (66) force, that is, the neutral return characteristic of the rolling hydraulic switching valve (43), and prevents the hydraulic switching valve (43) from malfunctioning and It is possible to prevent the failure of the valve (43) and the like by operating the hydraulic switching valve (43) while relaxing the detection signals of the rapid and direct rolling sensors (22) and (22). By changing the characteristic, that is, by changing the spring (66) (66) force,
For example, landslide work is performed in a hunting state in which the rolling sensors (22) and (22) on the left and right of the field are insufficiently leveled, and horizontal control signals that are unnecessary for the rice planting machine are also transmitted, so that the machine always tilts left and right. Operation lever (70)
To the lock direction side, and the spring (66) (66)
The force is increased to increase the neutral holding force of the spool (52) to desensitize the left and right rolling sensors (22) and (22) to prevent over-control of the rice transplanter, and vice versa. Further, with the operation lever (70) in the lock position, the neutral arm (6) is inserted through the scissors member (68).
5) and the spool (52) are locked at a neutral position to prevent the hydraulic switching valve (43) from operating, and for example, the left and right rolling sensors (22) (22) (22) (22) (22) when traveling on the road and changing direction at a ridge during rice planting work. ) Prevents the hydraulic switching valve (43) from being actuated due to its centrifugal force or collision with an obstacle, and can be performed in a stable posture without tilting the rice transplanter body.

8 and 9 show the slide spool (52).
(66) (66) which are neutral return members when a rolling spool type rolling hydraulic switching valve (43b) for rotating the spool (52a) around an axis is used instead of the rolling hydraulic switching valve (43) having The hydraulic switching valve (43b) is attached to the base frame (4).
4) The locking plate (56) which is connected to the side portion and directly fixes the pin (54) of the receiving cylinder (46) to the spool (52a).
In the guide groove (57), the receiving cylinder (46) and the spool (52a) are interlocked with each other, and the spool (52a) is rotated by the vertical swing of the receiving cylinder (46) to rotate the hydraulic switching valve. (43b) is actuated and the spool (52b
a) The neutral arm (65) is fixed to the tip end side, one spring (66) rotates the spool (52a) clockwise, and the other spring (66) rotates the spool (52a) counterclockwise. ) Are respectively wound and supported, and spring (66) and (66) forces are applied so as to always return the spool (52a) to the neutral position, so that the rolling hydraulic switching valve (43b) has a neutral return characteristic. The operation and hydraulic control are the same as those of the rolling hydraulic switching valve (43).

Further, as shown in FIG. 10, in the above-described embodiment, the spool (52) (52a) of the switching valve (43) (43a) (43b) is directly returned to the neutral state. A switch valve (43) (43a) having this structure
A link system for operating (43b) is made to return to a neutral position, and an arm (73) is provided on both outer sides of the receiving cylinder (46).
(73) is fixed, and a bracket (74) fixed to the rear side of the base frame (44) is connected to a support plate (76) via bolts (75) to connect the arms (73) (7).
3) A spring (77) for neutral return on the support plate (76)
(77) is stretched to normally keep the receiving cylinder (46) in a neutral state, that is, the rolling hydraulic pressure switching valve (43) in a neutral position, while the support plate (76) is provided with a guide groove (78). The support plate (76) is supported by a bolt (75) so as to be movable up and down, and the tension of the spring (77) is changed, whereby the left and right rolling sensors (22) (2).
The sensitivity of 2) can also be adjusted. A rolling sensor (22) that detects the lateral tilt of the planting part and a hydraulic cylinder (28) that corrects the lateral tilt of the planting part are provided to automatically install the planting part. In the horizontal transplanter, the rolling sensor (2) is provided with a spring (77) which is a neutral returning member for returning the rolling sensor (22) to the dead zone position.
2) The operation of the hydraulic cylinder (28) by the spring (7)
The rolling sensor (22) resists the spring (77) when a predetermined or more operating force limited by 7) acts.
Is operated to switch the rolling oil pressure switching valve (43) to perform horizontal automatic control.

[0017]

As is apparent from the above embodiments, the present invention provides a rolling sensor (2) for detecting the lateral inclination of a planting part.
2) and a hydraulic cylinder (2
8) is provided, and in the transplanting machine for automatically leveling the planting part, a neutral return member (77) for returning the rolling sensor (22) to the dead zone position is provided, and the hydraulic cylinder (28) by the rolling sensor (22) is provided. ) The operation is restricted by the neutral return member (77), and the response of the hydraulic pressure switching valve (43) to the operation of the rolling sensor (22) can be improved to improve the horizontal control characteristic, which is unnecessary. It is possible to prevent detection of the rolling sensor (22), prevent erroneous operation when horizontal control is not performed, perform stable driving operation, and can handle it more easily than before.

[Brief description of drawings]

FIG. 1 is a plan view of a main part.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a partial plan view.

FIG. 5 is a partial side view.

FIG. 6 is a partially enlarged explanatory view.

FIG. 7 is a hydraulic circuit diagram.

FIG. 8 is a plan view of a main part showing another modified structure example.

FIG. 9 is a hydraulic circuit diagram of the same.

FIG. 10 is a partial explanatory view of a rolling sensor unit.

[Explanation of symbols]

 (22) Rolling sensor (28) Horizontal hydraulic cylinder (77) Spring (neutral return member)

Claims (1)

(57) [Claims] 1. A transplanter for automatically leveling a planting part by providing a rolling sensor (22) for detecting the lateral tilt of the planting part and a hydraulic cylinder (28) for correcting the lateral tilt of the planting part. In the above, the neutral return member (77) for returning the rolling sensor (22) to the dead zone position is provided, and the operation of the hydraulic cylinder (28) by the rolling sensor (22) is limited by the neutral return member (77). Transplanter.