JP3280857B2 - Ridge height detector 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 ridge height detecting device for a transplanting machine for transplanting seedlings such as vegetables into a ridge while running over a ridge.

[0002]

2. Description of the Related Art A transplanter for upland fields for transplanting pot seedlings such as vegetables is provided with a traveling body that runs across a ridge.
A transplanting device is provided behind the traveling body so that seedlings are planted on the ridge while traveling along the ridge (for example, Japanese Patent Application Laid-Open No. 5-6). In this transplanting machine, the traveling body is configured such that a traveling body composed of an engine, a transmission case, and the like is supported by front and rear wheels disposed on both right and left sides thereof so as to be able to move up and down, and is mounted on a frame attached to the traveling body so as to be able to move up and down. While supporting the body, this planted body is pushed into the ridge and the seedlings held inside the planted body are planted in the ridge, and the height change of the ridge is detected, and the change in the height of the ridge is handled. The planting body is moved up and down in accordance with a change in the height of the ridge by moving the traveling body up and down.

The traveling machine body is configured to move up and down by vertically moving the left and right rear wheels relatively to the traveling machine body by an elevating cylinder composed of a hydraulic cylinder. The device for detecting the height of the ridge is configured by attaching a ground roller to the upper surface of the ridge on a swing arm that is swingably supported around the left and right axes of the traveling machine body. The ridge height is detected by using

[0004] The swing arm is linked to a lift valve arm that operates a control valve that controls the lift of the lift cylinder.

[0005]

In a transplanting machine, a traveling frame is provided with a movable frame having a front portion rotatably supported around a left and right axis and capable of swinging up and down, and a rear portion of the movable frame. In addition to providing a covering ring that rolls on the upper surface of the ridge so as to be in contact with the ground, the rear part of the movable frame is supported, and the planting body is provided at a front and rear intermediate portion of the movable frame so as to be movable up and down. , The penetration depth of the planting body into the ridge, that is, the planting depth can be changed, and the grounding roller is disposed in front of the planting body to control the elevation of the traveling machine body. It is thought that what was made to do.

[0006] In this transplanting machine, at the front end side of the ridge in the seedling planting direction, the ground roller first comes off the ridge, and automatic planting cannot be performed at the front end side of the ridge in the seedling planting direction. After being disengaged, the movable frame and the lift valve arm may be linked to each other so that the traveling body can be lifted and lowered by the covering wheel. In order to give priority to this, the vertical swing of only the swing arm is allowed when the ground roller is grounded (in other words,
The lifting and lowering valve arm does not operate even if the covering wheel moves up and down in response to the change in the height of the ridges), and play is provided in the interlocking mechanism that links the movable frame and the raising and lowering valve arm. If the relative height of the earth covering ring with respect to the movable frame is changed in order to change the height, the movable frame will eventually move up and down. Therefore, it is necessary to adjust the play of the interlocking mechanism.

As an adjusting method, an interlocking arm interlockingly connected to the lifting / lowering valve arm is fixed to the swinging arm with a bolt, and the bolt insertion hole is formed in an arc shape with the swinging center of the swinging arm as a fulcrum. It has been considered that the bolt is loosened and the interlocking arm is moved around the swing center of the swing arm, so that the lift valve arm side is moved by an amount corresponding to the adjustment of the earth covering wheel.

However, according to the above-mentioned adjustment method, the bolt must be loosened or tightened.
The problem is that the adjustment is cumbersome and inaccurate. Therefore, an object of the present invention is to consider that the adjustment can be performed easily and accurately.

[0009]

The technical means taken by the present invention to achieve the above object is to support a traveling body so as to be able to ascend and descend by wheels arranged on both left and right sides of the traveling body, and to vertically swing the traveling body. The swinging arm, which is freely pivotally supported, is attached with a grounding member that follows and contacts the upper surface of the ridge, detects a change in the height of the ridge due to the swing of the swing arm, and responds to the change in the height of the ridge. In order to raise and lower the traveling body, an elevation valve arm for operating a control valve of a hydraulic cylinder for elevating and lowering the traveling body and an oscillating arm are interlocked, and a front portion is pivotally attached to the traveling body so as to swing up and down. At the same time, a movable frame is provided that is supported by an earth covering wheel whose rear part rolls on the upper surface of the ridge. Stepwise adjustment of height relative to frame In a transplanter in which a movable frame and an elevating valve arm are operatively connected to each other, the swing arm is pivotally supported by a traveling body and is connected to an elevating valve arm in an interlocking manner. Divided into a rear component which is pivotably supported up and down and has a grounding member attached thereto, an adjustment lever is fixed to the front component, and the rear component is selectively engaged with the adjustment lever. A locking plate provided with a plurality of engaging portions in the vertical direction for restricting the vertical swing with respect to the front side structure was provided, and the pitch of the locking portions was made to correspond to the relative height adjustment pitch of the covering soil ring with respect to the movable frame. It is characterized by the following.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows a transplanting machine 1 for transplanting seedlings such as vegetables into a ridge. In FIG. 5, the vegetable transplanting machine 1 is a walking type having a transplanting device 3 and a steering handle 4 behind a traveling body 2, and The soil block seedlings are automatically planted at predetermined intervals in the ridges R while running in the longitudinal direction across the R.

The direction of movement of the transplanter 1 is referred to as the front-back direction, and the lateral direction perpendicular to the direction of movement is referred to as the left-right direction. The traveling body 2 has a gantry 6 attached to and fixed to a front portion of the transmission case 5 in a forwardly protruding manner, and has a traveling body 8 mainly constructed by mounting an engine 7 and the like on the gantry 6. Front wheel 10 and rear wheel 1 provided with 8 on both left and right sides
1 so that it can run.

The transplanting device 3 is provided on a transplanting frame 12 attached to the rear of the traveling machine 8 and includes a planting body 13 for planting a seedling in a ridge R, and a seedling supply for supplying a seedling to the planting body 13. Apparatus 14, soil covering ring 15 for burying the planted seedlings on the root side and crushing the roots, and electric heater 16 for forming holes for planting in multi-film covering ridge R
And the main configuration.

The transplant frame 12 comprises a fixed frame 12A having a front portion fixed to the transmission case 5 and a movable frame 12B having a front portion pivotally connected to the transmission case 5 so as to be rotatable around the left and right axes. , Fixed frame 1
The seedling supply device 14 is provided on 2A, the steering handle 4 is attached to the rear end of the fixed frame 12A, and the plant 13, the covering wheel 15 and the electric heater 16 are supported on the movable frame 12B.

As shown in FIG. 1, the implant 13 is supported by a swinging link mechanism 17, which is pivotally supported at its upper end by a bracket 18 fixed to the movable frame 12B. First parallel link 19 swinging back and forth
A relay plate 20 pivotally connected to the lower end of the first parallel link 19; and a second parallel link 21 pivotally moved up and down with the front end pivotally supported by the relay plate 20. The plant 13 is pivotally connected to the rear end of the plant 21.

A bearing 22 is fixed to an upper link 21a of the second parallel link 21. The bearing 22 is provided between a crank arm 23a of a crankshaft 23 which is rotatably supported on a movable frame 12B around a left-right axis. Crank pin 23b
Is inserted. Therefore, the crankshaft 23 is
, The planted body 13 swings back and forth while swinging up and down by the swinging of the first and second parallel links 19 and 20, and the planted body 13 travels It moves to draw a substantially elliptical orbit with respect to the body 2. And
The seedlings are dropped and supplied to the planted body 13 at the upper end side of the track, and the planted body 13 is provided with a beak-shaped opening device at a lower portion, and is lowered and opened with the opening device closed. Pores are ridges R
After the rush, the perforator is opened back and forth by the interlocking tool 24 to form a planting hole in the ridge R, and the seedling stored in the planting body 13 is released into the planting hole. Thereby, the seedlings are planted on the ridges R.

The seedling supply device 14 is disposed in front of the seedling mounting table 25 that moves intermittently in the left-right direction so as to laterally feed a seedling tray T containing a large number of soil block seedlings vertically and horizontally. And a seedling delivery device 26 that takes out seedlings one by one from the seedling tray T and transports them to the planting body 13. Note that the seedling mounting table 25 is provided with a vertical feed mechanism for vertically feeding the seedling tray T by one pitch of the pot portion after one row of the seedlings is taken out.

A pair of soil covering rings 15 are arranged on the left and right sides of the planting body 13 so as to sandwich the seedling planting portion, roll on the upper surface of the ridge R, and remove soil from the root side of the planted seedlings. At the same time, the soil is pressed down by pressing from both the left and right sides, and the edge of the stock is suppressed. The earth covering ring 15 is rotatably supported by a rear part of an earth covering ring frame 28 rotatably supported around a left and right axis by a bracket 27 fixed to a rear part of the movable frame 12B. An engaging plate 30 is fixed to the rear end portion of the movable frame 12B so as to engage with the planting depth adjusting lever 29 fixed to the rear end of the movable frame 12B. The rear portion of the movable frame 12B is supported by the earth covering wheel 15. ing.

The engaging plate 30 is formed in a U-shape from left and right side walls and a rear wall connecting the rear ends of the left and right side walls. A groove 31 is formed, and this engaging groove 31 is
A plurality of (seven in the example in the figure) engaging portions 31a which are detachably engaged with each other and the planting depth adjusting lever 29 is detached from the engaging portions 31a. And a movement permissible portion 31b in which the planting depth adjusting lever 29 is relatively vertically movable along the engaging plate 30.
By changing the engaging position of the planting depth adjusting lever 29 with respect to the engaging portion 31a, the movable frame 12B swings up and down, and the depth of the planting body 13 protruding into the ridge R, that is, planting a seedling. The depth can be changed.

In the illustrated example, the height of the movable frame 12B becomes higher and the planting depth becomes shallower as the position where the planting depth adjusting lever 29 engages with the engaging groove 31 goes upward, and the planting depth becomes shallower. The deeper you go, the deeper you go.
The electric heater 16 is disposed in front of the plant 13 and is supported by a parallel link mechanism (not shown) so as to move up and down in conjunction with the swinging link mechanism 17 of the plant 13. As shown in FIG. 11, the electric heater 16 has a brass heating element 33 fitted into the lower portion of a stainless steel cylinder 32 from below, and a large number of vertical grooves 34 formed on the heating element 33 from the upper surface side. In order to insulate the nichrome wire 35 from the cylindrical body 32 and the heating body 33, the nichrome wire 35 is connected in parallel, and the nichrome wire 35 is connected in parallel. Ceramic material 36 inside
Is filled and solidified.

When the electric heater 16 descends,
The lower surface of the heating element 33 provided at the lower end thereof is pressed against the multi-film, so that a hole for planting is formed in the multi-film.
3 enters the ridge R. The control of the electric heater 16 is shown in FIG.
2, when the main switch 37 and the electric heater switch 38 are turned on and the rotation sensor 39 is detecting the rotational power of the engine 7, the electric heater is controlled by an output signal from the control VP unit 40. The relay 41 is turned on, and the Nichrome wire 35 of the electric heater 16 is energized, so that the heating body 33 is heated. Further, the electric heater 16 includes a temperature sensor 42 for detecting the temperature of the heating body 33.
2 is input to the sensor thermal unit 43, and the sensor thermal unit 43
When connected to the P unit 40, the electric heater relay 41 is turned off when the heating element 33 reaches a predetermined temperature or higher, and the electric heater relay 41 is reset when the heating element 33 becomes lower than the predetermined temperature. On / off control is performed to maintain a substantially constant temperature.

When the electric heater relay 41 is turned on, the electric heater lamp 44 near the electric heater switch 38 blinks, and when the electric heater relay 41 is turned off by the detection signal of the temperature sensor 42, the electric heat is turned off. The heater lamp 44 is turned on. As shown in FIG. 8, the rotation sensor 39 has a driven pulley 45 of a belt wrapping transmission mechanism for transmitting the rotational power of the engine 7 fixed thereto, and transmits the rotational power of the engine 7 to the transmission case 5.
The input shaft 46 is provided in the vicinity of the input shaft 46. The rotation of the input shaft 46 is detected and a pulse is generated for each rotation of the input shaft 46. It is configured to be input to the control VP unit 40 and counted, and to output an output signal when a preset number of pulses are counted. This output signal is used to switch from an off state to an on state an electromagnetic clutch for connecting and disconnecting the power transmission from the PTO system power output portion of the transmission case 5 to the transplantation device 3. Then, when it comes to the upper part of the trajectory, it switches from on to off.

Therefore, the control VP unit 4
The inter-strain is determined by the number of pulses from the rotation sensor 39 counted at 0, and the number of pulses to be counted can be freely changed, and inter-strain adjustment is performed by changing the number of pulses. Detection of the input shaft 45 of the rotation sensor 39,
That is, the detection of the driving of the engine 7 is a requirement for the operation of the electric heater 16 because the Nichrome wire 35 is energized when the main switch 37 and the electric heater switch 38 are turned on. Even if the engine 7 is stopped, unless one of the main switch 37 and the electric heater switch 38 is turned off, the power is taken from the battery 47 and the alternator is not charged. This is because the battery 47 may rise in some cases.

Therefore, the rotation sensor 39 is provided to detect the rotation of the input shaft 46 as well as the rotation of the shaft which is constantly rotated when the engine 7 is driven. In the case of the electric heater 16 having the above-described structure, the cost is high, only rough temperature control can be performed by on / off control by the electric heater relay 41, and ceramics is used for insulation. There are problems such as poor durability against impact when coming into contact with the upper surface of the ridge R, and time (4 to 5 minutes) until work becomes possible.

Therefore, an apparatus as shown in FIG. 13 has been considered. The heater 52 includes a coil 50 formed of a conducting wire covered with glass fiber or the like and connected to an inverter 49 and a temperature sensor 51 provided at the bottom of a hollow heater body 48 made of stainless steel. , Microcomputer controller 53, external relay 54, dynamo 5
5 and so on, and can be provided at low cost.

An AC current generated from the dynamo 55 flows through the inverter 49 via the external relay 54 in accordance with an instruction from the microcomputer controller 53. When a high-frequency AC current (several tens of KHZ) is passed through the coil 50 by the inverter 49, an eddy current 56 flows through the heater body 48 due to a change in the magnetic field generated by the AC, and the heater body 48 generates heat. Since the heater body 48 is made of stainless steel, the skin resistance is large, a high calorific value is quickly obtained, the temperature reaches the working temperature quickly, and the waiting time can be reduced.

The temperature sensor 51 and the inverter 49
Is connected to the microcomputer controller 53, and
By changing the intensity of the coil current by changing the frequency of the AC current, the heater body 4 can be obtained by the following equation (1).
8, the microcomputer controller 53 responds to a change in the temperature detection signal from the temperature sensor 51.
By controlling the inverter 49, the surface temperature of the heater 52 can be controlled to be substantially constant, and efficient and stable work can be performed.

P = KRS (NI) ² ... (1) P: stainless steel heater absorption power K: constant RS: heater skin resistance N: number of coil turns I: coil current Because it is just covered with
The durability is remarkably improved as compared with the case where the ceramic material 36 is hardened and covered with the nichrome wire 35.

As shown in FIG. 5 and FIG.
The support frame 5 on which the battery 47 is mounted is
8 is mounted and fixed, and a support cylinder 59 having an axis in the left-right direction is fixed to a lower portion of the support frame 58.
The left and right inner end sides of a pair of left and right front wheel spindles 60 are rotatably inserted around the left and right axes, and the mounting cylinder 61 is fitted on the left and right outer end sides of the left and right front wheel spindles 60. .

A front wheel support arm 62 is provided on each of the left and right mounting cylinders 61.
The front wheels 10 are connected and fixed to each other, and the front wheels 10 are attached to the lower ends of the front wheel support arms 62 via axles so as to be rotatable around left and right axes. The outer end sides of the left and right front wheel support shafts 60 and the mounting cylinder 61 are formed in a hexagonal cross section so as to rotate integrally, and the left and right front wheels 10 are connected to the front wheel support shaft 6.
It can swing up and down around 0.

The outer ends of the left and right front wheel support shafts 60 and the mounting cylinder 61 are fixed by pins penetrating both, and the insertion holes for the pins formed on the outer end sides of the left and right front wheel support shafts 60 are axial center. The left and right positions of the front wheel 10 can be adjusted (that is, the wheel distance of the front wheel 10 can be adjusted). As shown in FIG. 8, the rotational power of the engine 7 is
As described above, the signal is input to the input shaft 46 of the mission case 5, and the input
The rotation shaft 63, the intermediate shaft 64, and the pair of left and right output shafts 65 are rotatably supported in parallel with each other.
Reference numeral 5 is formed to project outward from the transmission case 5 in the left-right direction.

On the rotating shaft 63, in order from the right, a free-rotating gear 66 rotatably fitted to the outside, a main clutch 67 spline-fitted slidably in the axial direction, a second speed gear 68,
A third speed gear 71 is integrally formed with the main clutch 67. The second speed gear 68, the first speed gear 69, and the back gear 70 are spline-fitted so as not to move in the axial direction. ing. The idle gear 66 meshes with a transmission gear 72 spline-fitted to the input shaft 46, and the main clutch 67 releasably meshes with the idle gear 67 to transmit power from the idle gear 66 to the rotary shaft 63. To form a meshing clutch.

On the intermediate shaft 64, a shift gear 73 provided with gears that mesh with the first, second, and third gears 69, 68, 71.
Are spline-fitted slidably in the axial direction, transmit the rotational power of the rotary shaft 63 to the intermediate shaft by changing the rotational speed, and engage the shift gear 73 with the back gear 70 via the reverse gear mechanism. The rotational power of the rotating shaft 63 is reversed to transmit power to the intermediate shaft.

A gear 75 meshing with the large gear 74 is spline-fitted to the intermediate shaft 64, and the rotational power of the large gear 74 is cut off to the left and right output shafts 65 via a pair of left and right steering clutches 76. Power is transmitted so as to be accessible. Left and right output shaft 65
As shown in FIG. 6, a transmission case 77 is provided via a chain winding transmission mechanism 78 in a transmission case 77 rotatably supported on the left and right sides of the transmission case 5 around an output shaft.
The rear wheel 11 is rotationally driven by the engine 7 by being linked to a rear wheel provided at a lower portion.

As shown in FIG. 9, the main clutch 67
The free gear 67 is engaged with the idle gear 67 by the urging force of the coil spring 80 interposed between the main clutch 67 and the second gear 68. A peripheral groove 82 is formed on the outer peripheral surface of the main clutch 67 so that a release fork 81 is engaged with the release fork 81. The release fork 81 is swingably supported by the transmission case 5 via a support shaft 83, and the support shaft 83 The base of the clutch lever 84 is fixed to the end of the clutch lever 84. One end of an inner wire 86 of Bowden wire is connected to the tip of the clutch lever 84 via a tension coil spring 85, and the other end of the inner wire 86 is connected to the gripping portion of the control handle 4. Is connected to a clutch operation lever 87 provided at

Therefore, when the clutch operating lever 87 is pulled in the direction shown by the arrow in FIG. 9, the clutch lever 84 is pulled up and the release fork 81 swings around the support shaft 83,
The main clutch 67 slides in the direction indicated by the arrow in FIG.
At the same time when the bite 6 is released, the main clutch 67
It is configured to be pressed against the speed gear 68. As shown in FIG. 10, a locking groove 89 is formed on the clutch disengagement side of the guide groove 88 for guiding the clutch operation lever 87, and the coil spring 85 is further attached from the clutch disengagement position indicated by the imaginary line a. By pulling the clutch operation lever 87 against the force and locking it in the locking groove 89 as shown by the imaginary line b, the main clutch 67
8 is held.

The frictional force between the main clutch 67 and the second speed gear 68 and the frictional force between the release fork 81 and the main clutch 67 generate a braking force for the rear wheel 11, which functions as a parking brake. Let me. By configuring the parking brake in this way, the structure can be simplified and the operation amount can be reduced.

The left and right transmission cases 77 can be independently repositioned to two positions in the left and right direction independently, and the distance of the rear wheel 11 can be adjusted by moving the transmission case 77 left and right. It is possible to cope with the difference (wide and narrow) in the ridge width between the entire multi ridge and the high ridge.
Further, in the illustrated example, the right and left front and rear wheels 10 and 11 are set to the positions when the transmission case 77 is in the wide position, and the left and right front and rear wheels 10 and 11 are set to the positions when the transmission case 77 is in the narrow position. However, during normal use, the left and right positions are set to the wide position or the narrow position.

As shown in FIG. 5, FIG. 6 and FIG. 7, a Monroe shaft 90 disposed in the left-right direction is rotatable around the left-right axis via a bearing 91 at the front-rear intermediate portion of the gantry 6. An elevating cylinder 92 composed of a hydraulic cylinder is arranged and fixed to the gantry 6 in front of an intermediate portion of the Monroe shaft 90 in the left-right direction. The piston rod 92A of the elevating cylinder 92 has a Monroe shaft 90
Is connected to the shaft 90 via a cylinder or the like which is rotatably fitted to the shaft 90, and the Monroe shaft 90 can be moved back and forth by the retraction of the piston rod 92A.

Incidentally, the Monroe shaft 90 can be fixed to the gantry 6 by fixing means. Brackets 93L and 93R are fixed to the left and right sides of the Monroe shaft 90, and a front connection bracket 94 is attached to each of the left and right front wheel spindles 60.
L, 94R are fixed, the rear connection brackets 95L, 95R are fixed to the left and right transmission cases 77, the right bracket 38R is formed to project downward, the left bracket 93L and the front and rear connection brackets 94L, 94R. ,
95L and 95R project upward.

The brackets 93L and 93R and the rear connection brackets 95L and 95R are connected by a connection link 96, and the front connection brackets 94L and 94R and the rear connection brackets 95L and 95R are connected by a connection rod 97. Note that a pair of left and right connecting portions of the brackets 93L and 93R and the front connecting brackets 94L and 94R are provided so as to be able to adjust the left and right position of the transmission case 77.

By moving the piston rod 92A of the elevating cylinder 92 back and forth, the left and right connecting links 96 are pushed and pulled back and forth, and the rear connecting bracket 95
L and 95R, the transmission case 77 swings up and down relatively to the traveling machine body 8, and the connecting rod 97 is pushed and pulled back and forth to connect the front connecting brackets 94L and 94R, the front wheel support shaft 60 and the mounting cylinder 61. Through the front wheel support arm 62
Swings up and down relatively to the traveling body 8, whereby the left and right front and rear wheels 10 and 11 simultaneously move up and down relative to the traveling body 8 and the front and rear wheels 10 and 11 contact the ground. As a result, the traveling machine body 8 inevitably moves up and down with respect to the ridge R, and can follow the change in the height of the upper surface of the ridge R to move the transplanting device 3 up and down.

A monroe cylinder 98 composed of a hydraulic cylinder is mounted on the gantry 6 so as to move together with the monroe shaft 90, and a piston rod 97 A of the monroe cylinder 98 is fixed to a bracket 9 fixed to the monroe shaft 90.
9 is pivoted. Therefore, Monroe cylinder 9
8 by retracting the piston rod 98A,
The Monroe shaft 90 rotates around the left and right axes, one of the left and right connecting links 96 is pulled forward, the one of the left and right connecting rods 97 is pushed forward, and the other of the left and right connecting links 96 is pushed backward. In addition, the other connecting rod 97 on the left and right is pulled backward, so that the traveling machine body 8 and the transplanting device 3 can be maintained in a horizontal state even on an inclined ground.

As shown in FIGS. 1, 2 and 5, a grounding roller (grounding member) 10 that rolls on the upper surface of the ridge R is provided below the rear side of the transmission case 5 and in front of the planting body 13.
No. 0 is disposed, and the ground roller 100 also serves as a pressure-reducing wheel that represses the upper surface of the ridge R. This ground roller 100
The swing arm 101 is disposed on the right and left sides of the left and right sides so as to move upward as it goes forward. The swing arm 101 is supported by a support shaft 102 whose front portion penetrates through the arm 101 and is screwed to the transmission case 5 so as to be swingable around the left and right axes, and has a rear portion via a pivot shaft 103. A grounding roller 100 is rotatably mounted around the left and right axes, and the grounding roller 100 follows a change in the height of the upper surface of the ridge. Detect changes.

The left and right swing arms 101 are connected to each other by a connecting plate 104 fixed to the front part thereof by bolts, and a mounting plate 105 is fixed to the left end of the connecting plate 104. A lower end side of an interlocking arm 106 arranged in a vertical direction is attached and fixed to a front portion. An arc-shaped long hole 107 of the arm 106 is formed in the upper part of the interlocking arm 106.
08 is slidably fitted, and this pin 108 is pivotally connected to one end of an elevating valve arm 109 shaped like a side view. An intermediate portion of the lift valve arm 109 is supported by a body of a lift control valve 110 fixed to an upper portion of the transmission case 5 via a support shaft 111 so as to be rotatable around a left-right axis. An engagement groove 112 is formed on the other end side. The lifting valve arm 10
9 is engaged with a pin 114 provided at one end of an operation lever 113 formed of a bell crank, and an intermediate portion of the operation lever 113 is engaged with a rotating spool 115 of the control valve 110 for elevating. Installed.

Therefore, when the ground roller 100 is lowered, the swing arm 101 and the interlocking arm 106 are moved to the support shaft 1.
2, swings clockwise in FIG. 2, and the lift valve arm 109 rotates counterclockwise in FIG.
As a result, one end of the operation lever 113 is pulled up, and the rotary spool 115 of the lift control valve 110 is moved to the traveling machine body 8.
, The piston rod 92A of the lifting cylinder 92 operates in the retracting direction, and the traveling machine body 8 descends until the rotary spool 115 returns to the neutral position.

When the ground roller 100 is raised, the swing arm 101 and the interlocking arm 106 rotate counterclockwise in FIG.
Rotates clockwise in FIG. 2 around the support shaft 111, whereby one end of the operating lever 113 is pulled down, and the rotating spool 115 of the elevating control valve 110 is operated in a direction to raise the traveling machine body 8. The traveling body 8 rises until the piston rod 92A of the lifting cylinder 92 operates in the protruding direction, and the rotary spool 115 returns to the neutral position.

The arc shape of the elongated hole 107 is such that the swing operation of the swing arm 101 about the support shaft 102 is proportional to the swing operation of the lift valve arm 109 about the support shaft 111. The change in the ridge height is accurately transmitted to the control valve 110 for raising and lowering. The radius of the long hole 107 is simulated by CAD simulation,
Alternatively, it can be obtained by calculation or the like.

One end of a sensitivity spring 116 composed of a tension spring is hooked to the other end of the operation lever 113, and the other end of the sensitivity spring 116 is hooked to a hook member 117 fixed to the fixed frame 12A. The pressing force on the upper surface of the ridge R of the ground roller 100 can be changed by changing the position at which the sensitivity spring 116 is hooked on the hook member 117.
The tracking sensitivity of the 00 to the upper surface of the ridge R can be adjusted.

Movable frame 12B and lift valve arm 1
09 is interlocked and connected by an interlocking mechanism 118.
The interlocking mechanism 118 includes a bell crank 119 pivotally attached to the fixed frame 12A so as to be rotatable around the left and right axes, a link 120 for linking one end of the bell crank 119 to the movable frame 12B, and a bell crank 119. , And an interlocking rod 122 for interlockingly connecting a connecting plate 121 fixed to the elevating valve arm 109, and a middle part of the interlocking rod 122 has a turnbuckle structure.

The link rod 122 and the connecting plate 121 are connected to each other by a pin 123 pivotally attached to the connecting plate 121.
22 are linked to each other by being slidably fitted in a longitudinal direction 125 in a longitudinal direction 125 formed in a coupled plate 124 fixed to 22. Thus, even if the ground roller 100 moves up and down during the planting operation, the pin 123 is
, The vertical movement of the ground roller 100 is allowed, and even if the movable frame 12 </ b> B swings up and down at the time of adjusting the planting depth, the control valve 110 is not affected. It has become. Also, during the planting operation near the exit (the end in the planting direction) of the ridge R, when the ground roller 100 comes off from the ridge R, the pin 123 is locked by the front end of the long groove 125. The ground roller 100 is suspended, and the earth covering wheel 15 functions as a detection roller for detecting the height of the upper surface of the ridge R in order to control the elevation of the traveling machine body 8.

The left and right swing arms 101 are made of a plate material and are divided into two members from front and rear components 101A and 101B. The front component 101A is pivotally supported by the transmission case 5 and is grounded to the rear component 101B. The roller 100 is attached, and the rear component 1 is attached to the rear of the front component 101A.
The front portion of 01B is pivotally connected via a support shaft 126 so as to be rotatable around the left and right axes.

The front side structure 1 of the left swing arm 101
An adjusting lever 127 is fixed to the rear portion of 01A so as to protrude rearward, and an engaging plate 128 that engages with the adjusting lever 127 is fixed to the rear component 101B so as to protrude upward.
The engagement plate 127 is formed in a U-shape from left and right side walls and a rear wall connecting the rear ends of the left and right side walls, and an engagement groove 129 is formed in the rear wall as shown in FIG. The engaging groove 129 is engaged with the adjusting portion 127 in which the adjusting lever 127 is removably engaged and the planting depth adjusting lever 29 is engaged.
The adjusting lever 127 is provided with seven engaging portions 129a formed at equal intervals in the vertical direction corresponding to the engaging portion 129a.
a, the adjustment lever 127 is moved from the engagement plate 12
Movement permitting unit 1 that can move relatively up and down along 8
29b.

The structure of the swing arm 101 is a structure for always keeping the positional relationship between the pin 123 and the long groove 125 constant when the planting depth is adjusted by the planting depth adjusting lever 29. . That is, as shown in FIGS. 3 and 4, the engagement position of the implantation depth adjustment lever 29 with the engagement portion 31 a is the same as the engagement position of the adjustment lever 127 with the engagement portion 129 a. Depth adjustment lever 29
Is engaged with the upper engaging portion 31a, the movable frame 12B swings slightly upward as shown by a solid line arrow in FIG. Is pulled rearward, and the positional relationship between the pin 123 and the long groove 125 changes. At this time, the adjustment lever 127 is moved to the next higher engagement portion in the same manner as the planting depth adjustment lever 29. 129a, the front component 101A of the swing arm 101 swings upward around the support shaft 102, and the interlocking arm 106 moves forward around the support shaft 102, as indicated by the dotted arrow in FIG. Rocking,
The elevating valve arm 109 rotates clockwise around the support shaft 111, and the positional relationship between the pin 123 and the long groove 125 returns to the original positional relationship. At this time, the rear component 101B swings relatively downward around the support shaft 126 with respect to the front component 101A, and is in contact with the upper surface of the ridge R.

The engaging portion 129a of the adjusting lever 127
By moving the engaging position with respect to the rotating spool 115 of the control valve 110, the adjusting range of the engaging position of the adjusting lever 127 with respect to the engaging portion 129a is within the neutral range of the rotating spool 115. The control valve 110 does not operate by adjusting the engagement position of the adjustment lever 127 with the engagement portion 129a.

[0055]

According to the present invention, the swing arm is pivotally supported by the traveling machine body and is connected to the lift valve arm in an interlocking manner, and is pivotally supported by the front structure so as to be vertically swingable. And an adjusting lever is fixed to the front component, and the rear component is selectively engaged with the adjusting lever to swing up and down with respect to the front component. A locking plate provided with a plurality of engaging portions for regulating movement in the vertical direction is provided, and the pitch of the locking portions corresponds to a relative height adjustment pitch of the covering ring with respect to the movable frame. When the height is adjusted relative to the position, the position of the adjusting lever and the engaging portion of the adjusting lever is changed correspondingly, so that the elevating valve arm and the elevating valve arm are connected to the movable frame in an interlocked manner. Easy adjustment with the mechanism And accurately perform to.

[Brief description of the drawings]

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

FIG. 2 is a side view of a main part.

FIG. 3 is a rear view of a locking plate that engages an adjustment lever.

FIG. 4 is a rear view of a locking plate that engages a planting depth adjustment lever.

FIG. 5 is an overall side view of the transplanter.

FIG. 6 is a plan view of a traveling body of the transplanter.

FIG. 7 is a side view of an elevating mechanism of the traveling body.

FIG. 8 is a rear sectional view of the transmission case.

FIG. 9 is a configuration diagram showing a clutch mechanism and a parking brake mechanism.

FIG. 10 is a plan view showing a guide groove of a clutch operation lever.

FIG. 11 is a sectional view of an electric heater.

FIG. 12 is a configuration diagram showing a control circuit of the electric heater.

FIG. 13 is a configuration diagram showing another perforation means.

[Explanation of symbols]

 Reference Signs List 8 traveling body 10 front wheel 11 rear wheel 12B movable frame 13 planting body 15 covering wheel 92 elevating cylinder 100 ground roller 101 swing arm 101A front side component 101B rear side component 109 elevating valve arm 110 elevating control valve 127 adjusting lever 128 Engagement plate 129a Engagement part R ridge

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hideki Tanaka 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-7-284308 (JP, A) JP-A-5-284 6 (JP, A) JP-A-1-160412 (JP, A) JP-A-10-8 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01C 11/00-11 / 02 303

Claims (1)

(57) [Claims] 1. A grounding member that supports a traveling body so as to be able to ascend and descend by wheels disposed on both left and right sides of the traveling body and grounds on an upper surface of a ridge to follow a swing arm pivotally supported by the traveling body so as to be vertically swingable. A lift valve that detects the change in the height of the ridge due to the swing of the swing arm, and activates the control valve of the hydraulic cylinder for lifting and lowering the traveling body in order to raise and lower the traveling body in response to the change in the height of the ridge. An arm and a swing arm are interlockingly connected, and the traveling body is provided with a movable frame supported by an earth covering wheel having a front portion pivotally mounted so as to swing up and down and a rear portion rolling on the upper surface of the ridge. In order to support the planting body on the movable frame and change the planting depth of the planting body, the height of the covering ring relative to the movable frame can be changed and adjusted stepwise, and the movable frame and the elevating valve arm Transplant machine linked with The swing arm is pivotally supported by a traveling machine body and is connected to an elevating valve arm in an interlocking manner, and a front grounding member is attached to the front structure so that the swing arm can swing vertically and a grounding member is attached. Divided into a rear component, an adjustment lever is fixed to the front component, and an engagement portion that selectively engages with the adjustment lever and regulates vertical swing with respect to the front component is provided on the rear component. A ridge height detecting device for an implanting machine, wherein a plurality of locking plates are provided in a vertical direction, and a pitch of the locking portions corresponds to a pitch for adjusting a relative height of a covering soil ring to a movable frame.