JP3204882B2 - Body height adjustment device for transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine height adjusting device for a transplanting machine for sequentially transplanting vegetable seedlings such as lettuce and cabbage into a ridge while running.

[0002]

2. Description of the Related Art A field transplanter for transplanting potted seedlings (planted seedlings) such as vegetables has a traveling body supported by wheels provided on both left and right sides and traveling across a ridge. A front part of a movable frame is pivotally attached to a rear part of the movable frame so as to be rotatable around a left and right axis. There is a planting device for planting seedlings in the ridge, and there is a device that detects unevenness on the upper surface of the ridge and raises and lowers the traveling machine body in accordance with the unevenness. The earth covering roller is also used as a vehicle height sensor, and the traveling body is moved up and down in conjunction with the vertical movement of the earth covering roller.

[0003]

In the above-mentioned prior art, since the covering roller is located behind the planting device, the planting height cannot be controlled until the covering roller rides on the upper surface of the ridge. There is a problem that the planting work near the entrance of the plant is difficult. Therefore, it is conceivable to provide a detection roller for detecting the unevenness of the upper surface of the ridge in front of the planting device. In the state where the planting operation is continued on the ridge upper surface, there is a problem that the detection roller is lowered and the traveling machine body is lowered, so that the planting operation cannot be performed.

[0004] In view of the above problems, it is an object of the present invention to provide a method for performing accurate planting at the entrance and exit of a ridge.

[0005]

The technical means taken by the present invention to achieve the above object is that the traveling body 2 is supported by wheels 9 and 10 provided on both the left and right sides and travels across the ridge 5. A front portion of a movable frame 40 is pivotably mounted on the rear portion of the traveling machine body 2 so as to be rotatable around left and right axes.
A soil covering member 37 which is grounded on the upper surface, and a planting device 35 which is located in front of the soil covering member 37 and in which seedlings are planted in the ridges 5.
In a transplanting machine in which the unevenness on the upper surface of the ridge 5 is detected and the traveling machine body 2 is moved up and down corresponding to the unevenness, a detecting member 63 that is in contact with the upper surface of the ridge 5 and detects the unevenness is attached to the planting device 35.
And the detecting member 63 is supported by the traveling body 2 so as to move up and down following the irregularities on the upper surface of the ridge 5, and the detecting member 63 comes out of the ridge 5 and the earth covering member 37 is on the upper surface of the ridge 5. When present, the detection member 63 and the movable frame 40 are interlockingly connected by an interlocking member 87 so as to prevent the traveling body 2 from lowering.

That is, the unevenness on the upper surface of the ridge 5 is detected by a detecting member 63 provided in front of the planting device 35 and separately from the soil covering member 37, so that the planting operation near the entrance of the ridge 5 can be easily performed. , Near the exit of the ridge 5, the detection member 63
When the soil covering member 37 is present on the ridge 5 even if it comes out of the ridge 5, the detecting member 63 is hung by the movable frame 40 by the interlocking member 87 to prevent the traveling body 2 from lowering, and the exit of the ridge 5 The planting work in the vicinity can be easily performed.

Further, it is preferable that the detecting member 63 is disposed at a rear portion of the traveling body 2.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the vegetable transplanter 1
This is a walking type having a transplanting device 3 and a steering handle 4 behind the traveling body 2, and while running in the longitudinal direction across the ridges 5, plant soil block seedlings on the ridges 5 at predetermined intervals in the longitudinal direction. Things.

The traveling direction of the transplanter 1 is referred to as the front-back direction, and the lateral direction perpendicular to the traveling direction is referred to as the left-right direction. The traveling machine body 2 has a gantry 7 attached and fixed to a front portion of a transmission case 6 so as to protrude forward, and an engine 8 and the like are mounted on the gantry 7, and is mainly composed of front wheels 9 and rear wheels 1 provided on both left and right sides.
It is supported so that it can run by 0.

The power of the engine 8 is input to a power transmission mechanism in the transmission case 6, and the power input in the transmission case 6 is transmitted to a wheel transmission shaft 11 protruding to the left and right sides via a transmission mechanism or the like. A first PTO shaft 12 provided rearward of the wheel transmission shaft 11 and protruding left and right, and a second PTO shaft 1 protruding from the rear surface.
3 and can be taken out.

As shown in FIGS. 1 and 5, a front wheel support frame 14 is fixedly mounted on the front portion of the gantry 7, and a support cylinder 15 arranged in the left-right direction is fixed to the front wheel support frame 14. A pair of left and right front wheel support shafts 16 are inserted into the cylinder 15 so as to protrude outward in the left and right direction, and are supported rotatably around the left and right axes. A mounting cylinder 17 is externally fitted to and fixed to each of the left and right front wheel support shafts 16, and an upper end of a support arm 18 is connected and fixed to each of the mounting cylinders 17, and a front wheel 9 is provided at a lower end of each support arm 18 around the left and right axes. It is mounted rotatably.

The front wheel support frame 14 is provided with a guide wheel 19 which is in contact with the upper side of the ridge 5 and rolls.
Support cylinders 20 for externally fitting the wheel transmission shafts 11 are attached and fixed to both left and right sides of the transmission case 6, and the upper part of the transmission case 21 is supported on each support cylinder 20 so as to be rotatable around the wheel transmission shaft 11. . The lower part of the transmission case 21 has a rear wheel 1
0 is rotatably supported around the left and right axes, and the wheel transmission shaft 11
Power is transmitted to the rear wheel 10 via a transmission mechanism in a transmission case 21 to rotate the rear wheel 10.

A horizontal cylinder 22 is supported at the front-rear intermediate portion of the gantry 7 so as to be movable back and forth. In front of the cylinder 22, an elevating cylinder 23 constituted by a hydraulic cylinder and fixed to the gantry 7 is provided. Is arranged, and the piston rod of the cylinder 23 is connected to the cylinder 22, and the cylinder 22 can be moved back and forth by the retraction of the piston rod.

As shown in FIG. 6, a rolling shaft 24 is inserted into the cylindrical body 22 so as to protrude on both left and right sides, and brackets 25 are protrudingly provided on left and right protruding portions of the rolling shaft 24. 25 and the left and right front wheel spindles 16 are connected by a pair of left and right front connection rods 27L and 27R, and the left and right brackets 26 and the left and right transmission cases 21 are linked and connected by a pair of right and left rear connection rods 28L and 28R. . A rolling cylinder 29 composed of a hydraulic cylinder located in front of the rolling shaft 24 is attached and fixed to the cylindrical body 22 via a support frame fixed to the gantry 7, and the piston rod of the cylinder 29 is connected to the rolling shaft 2.
4 is pivotally connected to a bracket 31 fixed thereto.

An elevating control valve 32 for controlling the elevating cylinder 23 is fixed on the transmission case 6, and a rolling control valve 33 for controlling the rolling cylinder 29 is fixed on the control valve 32. When the piston rod of the rolling cylinder 29 is protruded, the rolling shaft 24 rotates in the direction A shown in FIG. 6, the left front connecting rod 27L is pushed forward, and the left rear connecting rod 28L is moved forward. To the left and right front wheels 9,10
Moves upward, while the right front connecting rod 27R is pulled rearward and the right rear connecting rod 28R is pushed rearward, and the right front and rear wheels 9, 10 move downward.

When the piston rod of the rolling cylinder 29 is retracted, the operation reverses to that described above, and the transmission control valve 33 operates the transmission case 6, the gantry 7, the engine 8, and the transplanting device 3 even on an inclined ground. Etc. can be maintained in a horizontal state. When the piston rod of the elevating cylinder 23 is protruded, the rolling shaft 24 is moved rearward, the left and right rear connecting rods 28L, 28R are pushed rearward, and the left and right front connecting rods 27L, 27R are pulled rearward. When the left and right front and rear wheels 9 and 10 are simultaneously lowered to retract the piston rod of the elevating cylinder 23, the rolling shaft 24 is moved forward and the left and right rear connecting rods 28L and 28 are moved.
8R is pulled forward and the left and right front connecting rods 27
L and 27R are pushed forward, and the left and right front and rear wheels 9 and 10 are simultaneously raised. By the lifting and lowering control valve 32, the traveling machine body 2 is raised and lowered corresponding to the unevenness of the ridges 5, and the transplanting device 3 is moved. The distance between the ridge 5 and the upper surface can be adjusted.

The transplanting device 3 is provided on a transplanting frame 34 attached to the rear of the traveling machine body 2 and has a planting device 35 for planting seedlings in the ridges 5, and a seedling for supplying seedlings to the planting device 35. A supply device 36, a covering roller 37, and a punching device 38 for forming a planting hole in the multi-film covering the ridge 5.
And the main configuration. The transplant frame 34 includes a main frame 39 having a front portion fixed to the transmission case 6.
And a movable frame 40 whose front portion is pivotally attached to the left and right first PTO shafts 12 so as to be rotatable around the left and right axes.
The steering handle 4 is attached and fixed to the rear end of the main frame 39.

As shown in FIG. 7, a planting device 35, a soil covering roller 37 and a boring device 38 are mounted and supported on a movable frame 40, and the planting device 35 has a planting cup 41 for planting seedlings in the ridges 5. And a swing link mechanism 42 that supports the planting cup 41 so as to be vertically swingable. The swing link mechanism 42 includes a first parallel link 43 pivotally supported by the movable frame 40 so as to swing back and forth, and a swing plate 4 pivotally connected to a lower end of the first parallel link 43.
4 and a second parallel link 45 pivotally connected to the pivot plate 44 so as to pivot up and down. The planting cup 41 is pivotally connected to the rear end of the second parallel link 45.

The crankpin 47 of the crankshaft 46 is pivotally connected to the upper link of the second parallel link 45,
The power from the first PTO shaft 12 causes the crankshaft 46
Is rotated in the direction indicated by the arrow B in FIG. 7, so that the first and second parallel links 43 and 45 swing and the planting cup 41 swings up and down while swinging back and forth. Has become.

The planting cup 41 has an openable / closable opener at a lower portion thereof. The opener opens forward and backward when it enters the ridge 5 at the lower end side of the locus of the planting cup 41, and is planted in the ridge 5. A mounting hole is formed and a planting cup 4 is
1 can be planted. The piercing device 38 includes piercing means 48 constituted by a gas burner, and the piercing means 48 is attached to and supported by the movable frame 40 so as to be vertically movable via an elevating link 49 formed of a parallel link. A cam roller 50 is pivotally attached to the upper link of the lifting link 49, and the cam roller 50 rolls on the outer periphery of the disc cam 51 provided on the crankshaft 46. The perforating means 48 is moved up and down, and a heating body provided at the lower end of the perforating means 48 is pressed against the multi-film to form a transplant hole in the multi-film.

The soil covering roller 37 is disposed at the rear of the movable frame 40 behind the planting cup 41, and bears the load of the planting device 35, the perforating device 38 and the movable frame 40 by being grounded to the ridge 5. Support rod 53 supporting soil covering roller 37
Is a bracket 5 whose front part hangs down from the movable frame 40.
4 is connected to a supporting member 55 projecting from the rear end of the movable frame 40 so as to be adjustable in height.
Of the planting cup 41 from the upper surface, that is, the planting depth can be adjusted.

When the load (ground pressure) acting on the ridge 5 from the soil covering roller 37 is large, the movable frame 40 is suspended by the main frame 39 via elastic supporting means. When the load acting on the movable frame 40 is small, the movable frame 40 is supported by the main frame 39 by a spring means for urging the movable frame 40 downward. Also, the main frame 39
Is provided with a lower limit regulating member that regulates the downward movement of the movable frame 40 around the first PTO shaft 12 so that the earth covering roller 37 does not touch the ground when traveling on the road.

The seedling supply device 36 is disposed on the upper rear side of the main frame 39 and intermittently feeds a seedling tray 56 containing a large number of soil block seedlings vertically and horizontally, and a seedling tray feeding device 57; The seedling feeding device 58 is disposed in front of the feeding device 57 and takes out seedlings one by one from the seedling tray 56 and transports the seedlings to the planting cup 41.

The seedling tray 56 is made of plastic, is formed to be thin, has flexibility, and has a large number of pot portions 56a arranged in a grid pattern at a predetermined pitch vertically and horizontally.
The opening edges of the pot portion 56a are connected to each other in a planar manner. Then, the pot portion 56a is filled with floor soil, sowed and cultivated to grow soil block seedlings.

The seedling feeding device 58 has a seedling picking claw 60 supported via a swinging motion mechanism 59 driven by power transmitted from the second PTO shaft 13. The lower side of the block soil in 56a is stabbed diagonally from the front, and moves forward while slightly moving upward, pulls out the seedling from the pot portion 56a, and then moves downward while changing the posture so that the seedling becomes a substantially vertical posture. The seedlings are released at the lower end position of the movement locus, dropped and supplied to the planting cup 41 positioned at the upper end of the planting cup movement locus, and then reciprocated to return to the original position.

The seedling tray feeding device 57 includes a main frame 39.
And a movable frame 62, which is supported by a guide rail 61 fixed to the handle 4 so as to be movable in the left-right direction and in which a seedling tray 56 is loaded, so that the movable frame 62 is intermittently reciprocated in the left-right direction. The seedlings are taken out while the movable frame 62 moves in the left-right direction. The movable frame 62 is provided with a vertical feeding mechanism for vertically feeding the seedling tray 56. When the removal of the seedlings from the horizontal row of pot portions 56a is completed, the seedling tray 56 is moved vertically to the pot portions 56.
a is sent for one pitch.

As shown in FIGS. 1 to 4, a detection roller (detection member) 63 also serving as a pressure-reducing wheel is disposed below the rear side of the transmission case 6. It rolls to detect the irregularities.
Support arms 64 are disposed on the left and right sides of the detection roller 63 in the front-rear direction, and the detection roller 63 is attached to the rear of the support arm 64 via a support shaft 65 so as to be rotatable around the left and right axes. The mounting position of the support shaft 65 is determined by the support arm 6.
4 can be freely changed in the longitudinal direction.

The left and right support arms 63 are connected to each other by a connecting plate 66 and a reinforcing plate 67 at an intermediate portion in the longitudinal direction. The right side of the connecting plate 66 is extended upward and is supported by a supporting bolt 69 screwed to the right side wall of the transmission case 6 so as to be rotatably mounted and supported around a left and right axis.
On the left side of the connecting plate 66, a support bolt 70, which is concentric with the support bolt 69 and is screwed to the left side wall of the transmission case 6, is attached and supported so as to be rotatable around the left and right axes. The mounting plate 71 is fixed, and the left and right support arms 63 are supported so as to be able to swing up and down around support bolts 69 and 70 so that the detection roller 63 can be moved up and down.

A fixed plate 72 is fixed to the front end side of the left support arm 63 so as to protrude upward, and an interlocking arm 73 is arranged on the right side of the fixed plate 72 in the up-down direction. The fixed plate 72 and the interlocking arm 73
And is fixed to the fixing plate 72 by a bolt 75 screwed to a nut 74 fixed to the interlocking arm 73, and the front of the support arm 63 and the interlocking arm 73.
And is attached and fixed to the support arm 63 by a bolt 77 screwed into a nut 76 fixed to the interlocking arm 73.

The through hole 78 for the bolt 77 formed in the support arm 63 is a long hole that is long in the longitudinal direction of the support arm 63. A long hole 79 long in the longitudinal direction of the arm 73 is formed at an upper portion of the interlocking arm 73, and a pin 80 slidably fitted into the long hole 79 is formed at an upper portion of the interlocking arm 73 in a side view. One end of a rectangular arm 81 is pivotally connected. The middle part of the operation arm 81 is attached to the body of the control valve 32 for raising and lowering by a horizontal support shaft 82.
The operating arm 81 has an engaging groove 83 formed at the other end thereof.

An elevating control valve 3 is formed in the engaging groove 83 of the operating arm 81 and is formed of a bell crank and has an intermediate portion rotatably supported on the body of the elevating control valve 32 around a left and right axis.
One end of the operation lever 84 for two operations is pivotally connected via a pin 85 slidably fitted in the engagement groove 83. One end of a sensitivity spring 86 formed of a tension spring is hooked to the other end of the operation lever 84, and the other end of the sensitivity spring 86 is hooked to the body of the control valve 32 for elevation and the transmission case 6. By changing the spring force of the sensitivity spring 86, the pressing force of the detection roller 63 against the upper surface of the ridge 5 is changed, so that the sensitivity of the detection roller 63 to follow the unevenness of the upper surface of the ridge 5 can be adjusted. It has become.

In the above configuration, when the detection roller 63 is lowered as shown by a solid line in FIG. 4, the support arm 64 and the interlocking arm 73 are rotated clockwise around the support bolts 69 and 70, and the operation arm 81 is supported. One end of the operation lever 84 is pulled up around the shaft 82, whereby the spool of the control valve 32 for elevating and lowering is operated in the body descent direction, and the piston rod of the elevating cylinder 23 moves in the evacuation direction. The traveling body 2 moves down until the spool of the lift control valve 32 returns to the neutral position.

When the detection roller 63 is raised, the support arm 64 and the interlocking arm 73 rotate counterclockwise around the support bolts 69 and 70 to support the operation arm 81, as indicated by the imaginary line in FIG. Rotate clockwise around axis 82,
As a result, the one end of the operating lever 84 is pulled down, the spool of the control valve 32 for elevation is operated in the body ascending direction, the piston rod of the elevation cylinder 23 operates in the protruding direction, and the spool of the control valve 32 for elevation is neutralized. The traveling body 2 rises until returning to the position.

The lower end of an interlocking member 87 made of a wire is connected to the rear end of the support arm 64. The upper end of the interlocking member 87 is located halfway between the front and rear of the movable frame 40 of the transplant frame 34. Are linked. The interlocking member 87 is loose when the detection roller 63 rolls on the upper surface of the ridge 5 to detect the unevenness.
In the state where the detection roller 63 is out of the ridge 5 and the soil covering roller 37 is on the upper surface of the ridge 5 and the planting operation is continued, the interlocking member 87 is tightened and the detection roller 63 is stretched. Of the traveling body 2
Since the soil covering roller 37 is on the ridge 5, the lowering is stopped after a certain amount of lowering, and the planting is prevented from becoming impossible.

Therefore, in the vicinity of the exit of the ridge 5, the soil covering roller 37 functions as a detection roller for detecting unevenness on the upper surface of the ridge 5 in order to control the elevation of the traveling machine body 2. The interlocking member 87 is not limited to a wire, but may be a link or another mechanism. Also,
The transplanter is not limited to the walking type, but may be a riding type.

Further, in the present invention, the unevenness of the upper surface of the ridge is detected by a detecting roller separately from the soil covering roller, and the height of the traveling machine body can be changed and adjusted according to the change in the height of the ridge. Therefore, even if the strength of the soil covering roller (pressing force against the ridge) is set to be strong, the soil covering roller follows the upper surface of the ridge like the one that also serves as a detecting member for detecting the unevenness of the ridge. Sensitivity becomes dull, so that the planting depth cannot be optimized, and the sensitivity of the detection member to follow the upper surface of the ridge can be improved.

[0037]

According to the present invention, the detecting member 63 that contacts the upper surface of the ridge 5 and detects its unevenness is disposed in front of the planting device 35, and the detecting member 63 follows the unevenness of the upper surface of the ridge 5. And supporting the traveling body 2 so as to ascend and descend,
When the vehicle body 3 is out of the ridge 5 and the soil covering member 37 is on the upper surface of the ridge 5, the detection member 6
3 and the movable frame 40 are interlockingly connected by the interlocking member 87, so that the detection member 63 rides on the upper surface of the ridge 5 prior to the planting device 35, so that the planting operation near the entrance of the ridge 5 can be easily performed, and At the exit 5, in a state where the detecting member 63 has come out of the ridge 5 and the soil covering member 37 is on the upper surface of the ridge 5 and the planting operation is continued, the detecting member 63 is lowered and the traveling body 2 is lowered. Thus, the problem that the planting operation cannot be performed is solved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a transplanter.

FIG. 2 is a side view showing a relationship between a mechanism for detecting ridge irregularities, a movable frame, and soil covering rollers.

FIG. 3 is a partial front sectional view of a ridge unevenness detection mechanism.

FIG. 4 is a side view of a ridge unevenness detection mechanism.

FIG. 5 is a plan view of the traveling body.

FIG. 6 is a side view of the interlocking mechanism of the front and rear wheels.

FIG. 7 is a side view showing a part of the implantation device.

[Explanation of symbols]

 2 running machine 5 ridge 9 front wheel 10 rear wheel 35 planting device 37 soil covering roller 40 movable frame 63 detection roller 87 interlocking member

Continuation of the front page (56) References JP-A-6-14620 (JP, A) JP-A-62-48311 (JP, A) JP-A-63-66410 (JP, U) JP-A-4-38210 (JP, A) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01C 11/00-11/02 303

Claims (2)

(57) [Claims] 1. Wheels (9), (10) provided on both left and right sides
And a traveling body (2) supported by the vehicle and traveling across the ridge (5). A front portion of the movable frame (40) is pivotally attached to a rear portion of the traveling body (2) so as to be rotatable around a left-right axis. ,
A soil covering member (37) is provided on the movable frame (40), which is located at the rear of the frame (40) and is grounded on the upper surface of the ridge (5).
And a planting device (35) positioned in front of the soil covering member (37) for planting seedlings on the ridge (5). In a transplanter adapted to be moved up and down corresponding to the irregularities, a detecting member (63) for contacting the upper surface of the ridge (5) and detecting the irregularities is arranged in front of the planting device (35),
The detection member (63) is supported by the traveling body (2) so as to move up and down following the irregularities on the upper surface of the ridge (5).
The detection member (63) and the movable frame (40) are arranged to prevent the traveling body (2) from lowering when 3) comes out of the ridge (5) and the earth covering member (37) is on the upper surface of the ridge (5). ) Is interlockedly connected by an interlocking member (87). 2. An apparatus for adjusting the height of a body of an implanting machine, wherein the detecting member (63) is arranged at a rear part of the traveling body (2).