JPH02109905A - Apparatus for controlling lifting of transplantation machine - Google Patents

Abstract

PURPOSE:To prevent the collapse of levee caused by a sensor by using an apparatus to adjust the vertical position of a sensor to keep the grounding pressure of the sensor at the optimum level when the motion of the transplantation machine is started again after a pause. CONSTITUTION:In the case of the interruption of the transplantation work, a driving lever 150 is shifted to release a clutch. The motion of the machine body is stopped and, at the same time, the transplantation system is also stopped by this action. When the driving lever 150 is operated, a hydraulic lever 152 is forcibly shifted to a neutral position by an interlocking lever 156 to stop the vertical motion of wheels and keep the machine body and the grounding member at prescribed heights. In the case of the restart of the work, the driving lever 150 is shifted to couple the clutch, the hydraulic lever 152 is shifted to the working position after the actuation of the function of the hydraulic lifting apparatus and the driving lever 150 is set to the running position. Since the grounding pressure of the grounding member is maintained at the optimum level before the restart of the work, the collapse of levee caused by the grounding member can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transplanter for vegetables, etc. that is configured to prevent ridge collapse when restarting work.

[Conventional technology] A ground sensor is equipped with a ground sensor that moves along with the traveling body while touching the top surface of the ridge, and a hydraulic lifting device that operates according to the vertical movement of the sensor raises and lowers the traveling wheels to maintain a constant planting depth at all times. There is a transplanter that maintains this.

[Issue g to be solved by the invention] When the above-mentioned transplanting machine is in the process of planting, and the work is temporarily interrupted for replenishing seedlings or taking a rest, the machine stops running while maintaining the working position with the sensor in contact with the field. . When the vehicle stops running, the operation of each device such as the planting device also stops.

However, in this suspended state, the hydraulic lifting device is also stopped, so the weight of the machine is applied to the sensor, increasing the ground pressure of the sensor.If you start traveling at 7, the sensor may collapse the ridge or The mulch film covering the car was torn.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration.

That is, the transplanting machine according to the present invention is equipped with a sensor that detects the vertical position of the traveling machine when it touches the field, and operates the hydraulic lifting device d according to the vertical movement of the sensor to maintain a constant planting depth. The transplanter is provided with an adjustment device that adjusts the vertical position of the sensor so that the ground pressure of the sensor is at an appropriate level when the machine starts running again after once stopping running. It is characterized by

[Function] Since the ground pressure of the sensor is at the appropriate level when the vehicle starts traveling again after stopping, the sensor does not cause the ridges to collapse or the mulch film to be damaged.

[Example] 1 to 7 show one embodiment of the present invention.

This vegetable transplanter l has an engine 2 installed at the front end of the machine.
A main wheel transmission case 3, which transmits power via a centrifugal clutch 4, is arranged at the rear of the transmission case 3, and a front wheel transmission case 6. are provided diagonally downward at the rear, and front wheels 7, 7, which are propulsion wheels, are pivotally supported at the lower end of this front wheel transmission case. The left and right front wheels can be raised and lowered in conjunction with each other by a lifting device to adjust the planting depth.

A front transmission frame 10 having a transmission means therein extends rearward and is fixedly connected to one rear side of the main mission case 3 (on the left side in the illustrated example), and a transplant mission case 11 is provided at the rear end. It is being From this transplant part mission case 11, a hole digging device 30 to be described later
．． A cam shaft 12 equipped with a cam for driving a soil covering device 31 and a seedling feeding device 38 is provided to protrude laterally, and a rear transmission frame 14 that transmits power to a transplanting device 13, which will be described later, extends rearward. There is. A support pipe 15 is fixed to the middle part of the rear transmission frame 14 in the rearward -L direction, and an operation box 16 is provided at the upper end of the support pipe 15. A control handle 17 and various control levers, which will be described later, are attached to the control box 16.

A rear wheel support shaft 26 is installed horizontally below the camshaft 12, and left and right rear wheels 28.28 are attached to the lower ends of rear wheel support arms 27.27 rotatably provided at both ends of the shaft. is pivoted. The rear wheels 28.28 also move up and down in conjunction with the front wheels 7.7.

Further, a hole digging device 30 and a soil covering device 31 are attached to the center of the rear wheel support shaft 26.

The lifting device of the aircraft is hydraulic, and a hydraulic pump 50 is integrally provided at the rear of the main mission case 3, and a driving hydraulic cylinder 52 and its hydraulic valve 53 are installed behind it.
is provided. FIG. 3 is its hydraulic circuit diagram. A left and right horizontal take-up lever 55 is integrally provided at the rear end of the hydraulic cylinder 52, and left and right front wheel connecting rods 56 and a rear wheel connecting rod 57 are attached to both ends of the take-up rod.

This lifting device is controlled by a planting depth control device 60, which will be described next.

The planting depth control device @60 has a grounding body 63 attached to a support plate 62 protruding forward from a rotating shaft 61 located above the rear wheel support shaft 26, and a vertical member 66 integrated with the grounding body. and the spool 53a of the hydraulic valve are connected to the connecting rod 67.
connected by. The grounding body 63 includes a middle plate part 63a extending rearward from the base and side plate parts 63b provided on both sides of the middle plate part, and has a shape that surrounds the top of the ridge 205. In addition, in the figure, the ridges 205 are covered with a mulch film 206.

During work, the grounding body 63 is attached to the ridges 205 as shown in FIG.
As the ridge progresses while leveling the top of the ridge, vertical movement corresponding to changes in the height of the ridge is transmitted to the spool 53a of the hydraulic valve via the connecting rod 67. That is, the grounding body 6
3, its role as a leveling tool for leveling the top of the ridge;
It serves as a sensor that detects the height of the ridge. When the ridge becomes higher and the rear part of the grounding body 63 moves upward, the arm 66
The spool 53a is pushed in via the rod 67, and the hydraulic valve 53 is switched in the direction of extending the hydraulic cylinder 52. When the hydraulic cylinder extends and the balance rod 55 moves rearward, the rotary cylinders 5, 5 and the rear wheel support rod are connected to the front wheel connecting rods 56, 56 and the rear wheel connecting rods 57, 57 attached thereto. 26 is rotated, the front wheels 7.7 and the rear wheels 28.28 are simultaneously lowered, and the fuselage is lifted up. Conversely, when the ridge becomes lower and the rear of the ground contact body 63 is lowered, the fuselage is lowered. In this way, by appropriately raising and lowering the machine body according to changes in the height of the ridges through the action of the planting depth control device 60, the planting work section can be maintained at a constant height from the field surface.

A seedling stand 35 consisting of a movable frame 33 and a receiving frame 34 is provided on the upper part of the machine with a slight inclination so that the front part is at the -E position. The movable frame 33 is provided with a seedling feeding device 38 in its bottom opening, which has a seedling feeding belt 38C stretched between a pair of front and rear rolls 38a and 38b, and has front and rear rails 39.4.
0 so as to be slidable in the left and right direction. The receiving frame 34 is integrally formed with the rear rail 40 adjacent to the rear end of the moving frame 33, and has a seedling outlet formed in the left and right center portions. As the seedlings 200 for transplantation, pot-shaped seedlings grown in a paper seedling raising device 201 (- shown upside down) in which pots 201a are arranged vertically and horizontally as shown in FIG. 9 are used. be done. By reciprocating the movable frame 33 carrying the seedlings left and right, the seedlings in the last row on the receiving frame 34 are sequentially supplied to the seedling outlet. In addition, the moving frame 33
When it moves to the end of the left and right stroke, the drive roll 38a of the seedling feeder a38 is rotated by a predetermined amount in a predetermined direction, and the seedlings are transferred backward by one row by the seedling feed belt 38a.

The transplant device 9313 includes first rotating cases 71., each containing a plurality of shafts, gears, etc. A second rotation case 72 and a transplant case 73 are provided, and the transplant case 73 has a pair of transplant claws 75.
75 and a seedling extrusion body 76 are provided. The first rotating case 71 rotates counterclockwise in FIG. 1 at a predetermined speed corresponding to the rotational speed of the front wheels 7, 7, and the second
The rotating case 72 rotates 2 in the opposite direction (clockwise direction).
The transplant case 73 rotates at twice the speed, and the transplant case 73 is set so that the axis of the transplant case does not rotate relative to the zero aircraft, which moves vertically in an elongated elliptical trajectory.
The transplant case 73, the transplant claws 75, 75, and the seedling pusher 76 attached thereto maintain the same posture throughout.

P in Figure 1 represents the trajectory of the tip of the transplanted nail,
At point A, a pair of transplanted claws 75, 75 clamp the potted seedling supplied to the seedling outlet, and at point B, the transplanted claws open to plant the potted seedling in the field. In addition, at point 0, the seedling pusher 76 starts its downward movement and forcibly separates the seedlings that are attached to the transplant claws 75, 75 and are about to be lifted from the transplant claws, so that the seedlings can be transplanted reliably. It will be done.

Note that the rear portions of these transplant devices 13 are covered by a cover 78 erected at the rear end portion of the rear transmission case 14 .

The hole digging device 30 has a mounting plate 84 pivotally connected to the rear ends of a seventh link 81 and a lower link 82 which are respectively supported by upper and lower pivot shafts 81a and 82a, and a pair of inverted U-shaped mounting plates 84 A digging pawl 85 with a sharp lower end and a plate-shaped body 86 with both left and right ends bent slightly backward and facing in a direction perpendicular to the direction of travel are provided. The plate-shaped body 86 is a hole digging claw 8
The lower end is fixed to the rear surface of 5 so that it is placed above the lower end of the digging claw. The upper pivot shaft 81a is pivotally supported by the rear end of the ground body support plate 62, and the lower pivot shaft 82a is an arm 8 rotatably provided around the rear wheel support shaft 26.
It is pivotally supported at the tip of 8.

- The pivot shafts 81a and 82a of the F are connected to each other by a connecting plate 89. These ground body support plate 62, arm 88 and connection plate 89 connect one rotation shaft 61 and rear wheel support shaft 26.
A link mechanism is constructed in which the pivot shafts 81a and 82a below L are the connection points. Further, a spring 91 that biases the upper link 81 upward is attached to a mounting plate 90 fixed to the rear wheel support shaft 26. 92 is above link 8
This is a stopper that regulates the upper limit of the operation of 1.

As a drive mechanism for this drilling device 2130, a cam follower 94 made of a bearing is fitted onto a shaft 93 provided on the L link, and a cam 95 is mounted on a cam mounting shaft 12 facing the cam follower 94. Cam 95 is the fifth
By rotating counterclockwise in the figure, when the cam engages with the cam follower 94, the upper link 81 is pushed down and the digging pawl 85 and the plate-shaped body 86 move down,
When the engagement is released, the cam 95 moves once due to the action of the spring 91.The cam 95 has a cam surface 95a that operates to temporarily stop the digging pawl 85 and the plate-shaped body 86 at the lowest position. Because of this, as the machine advances, the digging claws 85 and the plate-shaped body 86 move while remaining submerged in the soil, and a transplant hole is formed in the field.

The soil covering device 31 is connected to the support rod 13 via universal joins 130, 130 at both ends of the lower pivot #82a.
1 and 131 are connected, and the support rod protrudes outward and downward and then bends backward, and a pair of left and right cover tools 132, 132 are supported on both sides of the ridge 205 at the rear end. In the soil covering tool 132, a soil covering plate 134 made of a flexible material such as synthetic resin is integrally added to the back surface of the rear end of a support plate 133.

As a drive mechanism for this soil covering device 31, an arm 140 is provided integrally with the pivot shaft 82a, and a cam follower 142 made of a bearing is provided at the tip of the arm 140 to face the cam 141 attached to the cam mounting shaft 12. ing.

As the cam 141 rotates, the cam follower 142 is pushed down periodically, and the accompanying rotation of the pivot shaft 82a is transmitted to the universal joints 130, 130. Support arm rod 131 for pivot shaft 82a.

131(7) Since the bases 131a, 131a are slanted, when the support rod is driven, the left and right soil covering plates 134.1
34 presses the soil on both the left and right sides of the transplanted seedling diagonally inward from above. Since the soil pressed by the soil covering plate presses the sloped side surfaces of the seedling pot portion 200a from both sides, the upper portion is reliably held at a predetermined position and in a predetermined posture. In addition, the pair of left and right soil covering plates press the soil around the seedlings so that the soil swells upward, and the pot portion 200a
Sufficient earthwork is also carried out at the -F section.

Next, the levers provided in the operation box 16 will be explained. The travel lever 150 is a lever that performs on/off operation and speed adjustment of the centrifugal clutch 4, and when it is in the rear position, the clutch is in the "off" state, and when it is in the intermediate position, the clutch is in the "on" state. When tilted, the traveling speed changes depending on the amount of tilt. Planted, <-151
is a lever that turns on/off the various work system devices such as the transplant device 13, and when pulled rearward, these devices are turned off, and when pushed forward, these devices are turned on. . Further, the hydraulic lever 152 is a lever for raising and lowering the machine body, and is connected to the connecting rod 67 via a wire 153. When this lever is positioned forward, the machine body descends into a working state, and moves backward. When placed in this position, the machine rises and enters a non-working state, and a neutral position is provided between these positions where the machine neither raises nor lowers. and,
An arm 154 is rotatably provided so as to come into contact with the rear surface of the travel lever 150, and an arm 155 is provided in parallel thereto.
An interlocking rod 156 is attached between the clutch lever 156 and the clutch lever 156 for forcibly operating the hydraulic lever 152 from the working position to the neutral position when the travel lever 150 is pulled to the clutch "off" position.

The interlocking rod is provided so as to bypass the planting lever 151 so as not to interfere with the planting lever 151 when the travel lever 150 is operated. This interlocking rod 156 is a rest adjustment device for maintaining the ground pressure of the ground sensor 63 at an appropriate level when work is restarted.

During work, the planting lever 151 is set to "on", the hydraulic lever 152 is set to the working position, and an arbitrary speed is selected with the travel lever 150 to perform the planting work.

At this time, the lateral movement device of the seedling stand, the seedling feeding device 38, the transplanting device 13, the digging device 30, and the soil covering device 31 operate in synchronization with each other, and the transplanting device moves into the transplanting hole formed by the digging device 30. 13 sequentially plants the seedlings on the seedling stand 35, and then covers and compacts the seedlings with the soil covering device 31. During this planting work, the planting depth of the seedlings is kept constant regardless of the height of the ridges 205 by the action of the planting control device 60 as described above. The planting depth is adjusted using a planting depth adjustment lever 68. When the lever 68 is lowered, the ground surface of the grounding body 63 is lowered with respect to the machine body, so the machine body rises from the ridge surface and the planting depth becomes shallow. In addition, as the lever 68 is operated, the upper and lower pivot shafts 81a and 82a move downward, and the digging device W130 and the soil covering device i! The overall level of t31 becomes low. Conversely, raising the lever 68 increases the planting depth. Also, at this time, the upper and lower pivot shafts 81a, 8
2a moves upward, and the level of the hole digging device 30 and the soil covering device 31 becomes higher. In this way, when the planting depth is changed, the level of the hole digging device 30 and the soil covering 2t31 from the ridge surface is adjusted accordingly, so that the size of the transplant hole formed by the hole digging device 30 can be approximately adjusted. In addition to being able to maintain a constant pressure, the pressing force with which the soil covering plate 134 of the soil covering device 31 compacts the soil is also approximately constant.

If you want to temporarily interrupt the work, turn the traveling lever 150 to the clutch "off" position, and the machine will stop traveling and the power transmission to the planting work section will be stopped, so each device related to the planting work will also stop. do. Further, by operating the traveling lever 150, the hydraulic lever 152 is forced to the neutral position ffl.
Since it is operated to the A-body ascending side, the vertical movement of the wheels is stopped and the heights of the aircraft body and the grounding body 63 are kept constant.

When restarting work after interruption, first press the travel lever 15.
0 is set to the clutch "on" position so that the function of the hydraulic lifting device starts to work, the hydraulic lever 153 is set to the working part l, and then the traveling lever 150 is set to the traveling position. Since the ground pressure is maintained appropriately, the ridges 205 are not collapsed by the grounding body 63,
The mulch film 206 covering the ridges will not be torn.

In some cases, the travel lever 150 is linked to the planting lever 151. For example, when the planting lever 151 is turned on, the travel lever 150 becomes the travel position and automatically starts traveling; If the planting lever 150 is returned, the planting lever 151 may also be returned, and each device of the planting work section may be automatically stopped.

FIG. 8 shows a different embodiment, and this transplanter 1' is
As an engine clutch, a first clutch 161 transmits power to the hydraulic pump 50, and a second clutch transmits power to the traveling system and work system.
The two clutches provided with the clutch 162 are both centrifugal clutches, and the first clutch 161 is the second clutch.
The structure is such that the clutch 162 is connected on the side where the engine speed is lower than that of the clutch 162.

This transplanter 1' has a travel lever 150 and a hydraulic lever 15.
Since an interlocking rod for interlocking the hydraulic levers 152 and 2 is not provided, the hydraulic lever 152 remains on the lowering side when the work is interrupted. Therefore, the ground pressure of the grounding body 63 is high when the work is interrupted. However, when the engine speed is gradually increased using the travel lever 150 when work is resumed, the first clutch 161 is engaged and the hydraulic pump 50 is activated, and the aircraft body rises slightly, causing the grounding body 63 to return to the fixed position. do. Thereafter, the second clutch 162 is engaged to start traveling and planting work, so that the grounding body 63 does not cause the ridge to collapse.

[Effects of the Invention] As is clear from the above description, in the transplanting machine according to the present invention, the ground pressure of the ground sensor is at the appropriate pressure when the machine starts running again after once stopping running. The collapse of the ridges and damage to the mulch film no longer occur.

[Brief explanation of drawings]

FIG. 1 is a side view of a vegetable transplanter which is an embodiment of the present invention;
Figures 2 (a) and (b) are a side view and a plan view of the planting depth control device, Figure 3 is a hydraulic circuit diagram of the lifting device, Figure 4 is a cross-sectional view of the ridge, and Figure 5 is a hole digging 6 is a perspective view of the operating section, FIGS. 7(a) and 7(b) are a side view and a plan view thereof, FIG. 8 is an overall side view of a different embodiment, and FIG. 9 is a side view of the device and soil covering device. The figure is an explanatory diagram of a seedling raising device, and FIG. 10 is an explanatory diagram of seedlings. 1.1'...Vegetable transplanter, 7...Front wheel, 13...
Transplant device, -28... Rear wheel, 30... Hole digging device,
31... Soil covering device, 35... Seedling stand, 60... Planting depth control device, 150... Running/< +, 1
51... Planting lever, 152... Hydraulic lever, 15
6... Interlocking rod (adjustment device g!1), 161... First clutch, 162... Second clutch, 200... Seedling,
205...ridge.

Claims (1)

[Claims] (1) A transplanter that is equipped with a sensor that detects the vertical position of the traveling machine when it touches the field, and that operates a hydraulic lifting device according to the vertical movement of the sensor to maintain a constant planting depth. The transplant machine is equipped with an adjustment device that adjusts the vertical position of the sensor so that the ground pressure of the sensor is at an appropriate level when the machine starts running again after once stopping running.