JP3280842B2 - 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 In a field transplanter for transplanting potted seedlings (planted seedlings) of vegetables and the like, a driving body is supported by driving wheels, and a planting frame is vertically swung about a front portion as a fulcrum. A planting means which is freely supported, and which is provided with a planting means for planting seedlings on ridges in the planting frame so as to be able to move up and down, and a soil covering on the rear side of the planting frame for covering the seedlings after planting behind the planting means. A wheel is provided so as to swing the planting frame up and down in conjunction with the up and down movement of the covering soil wheel, and there is a type provided with an elevating mechanism for elevating a traveling machine body with respect to the drive wheel. In the conventional transplanter, the covering wheel is also used as a vehicle height sensor, and the lifting mechanism is moved up and down in conjunction with the vertical movement of the covering wheel.

[0003]

Therefore, conventionally, the covering wheel is also used as a vehicle height sensor, and the lifting mechanism is moved up and down in conjunction with the vertical movement of the covering wheel. When entering, the covering wheel, which is a vehicle height sensor, is located on the rear side of the traveling body, so it is located behind the end of the ridge, so the covering wheel can not be installed on the ridge,
For this reason, if the covering wheel, which is a vehicle height sensor, is lowered quickly, the lifting mechanism moves up and down in conjunction with the vertical movement of the covering wheel,
There was a problem that the traveling aircraft would get on the ridge.

SUMMARY OF THE INVENTION An object of the present invention is to provide a body height adjusting device for a transplanting machine which can always perform good height adjustment even at the start or end of planting or when a ridge is cut in the middle. And

[0005]

The first concrete means for solving the problems in the present invention is that the driving wheels 24 are supported by the traveling body 12, and the planting frame 62 is vertically moved with the front portion as a fulcrum. A planting means 61 for swingably supported, planting means 61 for planting seedlings on the ridges 14 is provided on the planting frame 62 so as to be vertically movable, and an elevating mechanism 96 for elevating the traveling machine body 12 with respect to the drive wheels 24 is provided. Of the running machine 1
On the second side, a rear vehicle height sensor 111 and a front vehicle height sensor 119 that swing vertically following a change in the height of the ridge 14 are provided at a distance from each other, and the vertical swing of these vehicle height sensors 111 and 119 is provided. An interlocking mechanism for raising and lowering the elevating mechanism 96 is provided so as to move the elevating mechanism 96 up and down in conjunction with.

A second concrete means for solving the problem in the present invention is that the driving wheels 24 are supported by the traveling machine body 12 and the planting frame 62 is supported so as to be able to swing up and down around a front portion. In a transplanting machine provided with a planting means 61 for planting seedlings on the ridges 14 in the planting frame 62 so as to be movable up and down, and a lifting mechanism 96 for lifting and lowering the traveling machine body 12 with respect to the drive wheels 24, On the rear side of the fuselage 12,
The rear vehicle height sensor 111 is provided so as to swing up and down in accordance with the height change of the rear wheel 4, and the elevator mechanism 96 is moved up and down in conjunction with the vertical swing of the rear vehicle height sensor 111. Is provided with an interlocking mechanism for raising and lowering the
2, when the rear vehicle height sensor 111 comes off the ridge 14, it swings up and down following the height change of the ridge 14 and
6 is provided with a front vehicle height sensor 119 that moves the vehicle 6 up and down.

A third concrete means for solving the problem in the present invention is that the driving wheel 24 is supported by the traveling body 12 and the planting frame 62 is supported by the front part as a fulcrum so as to be vertically swingable. In a transplanting machine provided with a planting means 61 for planting seedlings on the ridges 14 in the planting frame 62 so as to be movable up and down, and a lifting mechanism 96 for lifting and lowering the traveling machine body 12 with respect to the drive wheels 24, On the front side of the fuselage 12, ridge 1
The front vehicle height sensor 119 is provided so as to swing up and down in accordance with the change in the height of the vehicle 4, and the elevation mechanism 96 is moved up and down in conjunction with the vertical oscillation of the front vehicle height sensor 119. Is provided with an interlocking mechanism for raising and lowering the
2, when the front vehicle height sensor 27 comes off the ridge 14, it swings up and down following the height change of the ridge 14 and
Is provided with a rear vehicle height sensor 111 for raising and lowering the vehicle.

[0008] Therefore, the traveling body 12 travels while straddling the ridge 14. A planting frame 62 whose front portion is supported so as to be able to swing up and down around the shaft 21 with respect to the traveling body 12 supports the planting means 61. When the height of the ridge 14 changes, the rear vehicle height sensor 111 or the front vehicle height sensor 119 swings up and down following the height change of the ridge 14, and the height change of the vehicle height sensor is transmitted to the elevating mechanism 96. In conjunction therewith, the traveling body 12 is moved up and down to a height corresponding to the height of the ridge 14.

When the transplanting machine enters the ridge 14 at the start of planting or the like, the rear vehicle height sensor 111 detects the ridge 1 as indicated by a chain line.
4, and when the transplanter leaves the ridge 14 at the end of planting or the like, the front vehicle height sensor 119 separates forward from the end of the ridge 14. However, even when such planting starts, planting ends, or when the ridge 14 is cut off halfway, either the rear vehicle height sensor 111 or the front vehicle height sensor 119 is The traveling body 12 is vertically swung up and down according to the height change of the ridge 14, and the traveling body 12 is moved up and down to a height corresponding to the height of the ridge 14, so that the height of the traveling body 12 can be constantly adjusted well.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a vegetable transplanter 11 is a walking type having a steering handle 13 at a rear portion of a traveling machine body 12. The vegetable transplanter 11 runs over a ridge 14 in a longitudinal direction thereof, and covers a soil block seedling with a multi-film M. The ridges 14 are planted at predetermined intervals.

The traveling body 12 includes a main frame 15 and a gantry 16 provided at the front end of the main frame 15. An engine 17 is mounted on the gantry 16. The engine 17 is covered with a bonnet 18, and a transmission case 19 is fixed to a rear portion of the gantry 16. Power is transmitted.

The power input into the transmission case 19 is transmitted to a wheel transmission shaft 20 projecting left and right, and a first PTO provided rearward of the wheel transmission shaft 20 and projecting left and right. It can be taken out from the shaft 21 and the second PTO shaft 22 projecting rearward and upward.
Right and left driving wheels 24 (rear wheels) are provided at the left and right ends of the wheel transmission shaft 20 via a transmission case 23 that can swing up and down around the axis.
The drive wheels 24 roll in the grooves between the ridges 14. In addition, a pair of left and right front wheels 2 is provided at the front of the traveling body 12.
6 are provided.

The left and right transmission cases 23 can swing up and down around the axis of the wheel transmission shaft 20 to adjust the relative vertical position between the drive wheels 24 and the traveling machine body 12. Is provided with a lifting mechanism 96 having That is, the right and left transmission cases 23 are vertically swung by the hydraulic cylinder 95 of the elevating mechanism 96, and the ridges 14 of the traveling body 12 are moved.
The height from is adjustable.

FIG. 3 shows a power transmission system of a traveling system and a PTO system.
Is transmitted to the input shaft 29. Mission case 19
A rotation shaft 30, an intermediate shaft 31, a back shaft 32, a wheel transmission shaft 20 and a first PTO shaft 21 are rotatably supported in parallel with the input shaft 29, respectively.
2 are provided so as to protrude rearward.

The gear 29a on the input shaft 29 is meshed with the idle gear 33 on the rotary shaft 30, and the clutch gear 34 is slid on the idle gear 33 so that the engagement portion is engaged, so that the input gear is engaged. Power can be transmitted from the shaft 29 to the rotating shaft 30. The clutch gear 34 is resiliently pressed in a direction in which it engages with the idle gear 33, and constitutes a pawl-type main clutch.

Between the rotating shaft 30 and the intermediate shaft 31,
Transmission 35 capable of switching between first speed (F ₁ ), second speed (F ₂ ), third speed (F ₃ ), neutral (N), and reverse (R)
Is provided. A transmission gear 3 is provided on the intermediate shaft 31.
6 and a parking brake (not shown) are provided, and the transmission gear 36 meshes with a large gear 37 fixed to the wheel transmission shaft 20. Then, from the wheel transmission shaft 20 to the transmission case 2
Power is transmitted to the drive wheels 24 via the wrapping transmission 25 in 3 so that the drive wheels 24 can be driven.

The rotating shaft 30 has one end protruding from the transmission case 19, an electromagnetic clutch 38 fixed to the outer end thereof, and a cylindrical shaft-shaped cup surrounding the outer end of the rotating shaft 30. The ring shaft 39 is rotatably supported by the transmission case 19, and the rotation of the rotary shaft 30 and the coupling shaft 39 is integrally rotated by the operation of the electromagnetic clutch 38, so that the power of the PTO system can be branched and taken out.

A gear 40 is fixed to the coupling shaft 39. The gear 40 meshes with an idler gear 41 loosely fitted on the intermediate shaft 31, and the idler gear 41 further engages with a gear 42 on the first PTO shaft 21. The gears mesh with each other to enable transmission of PTO power. A bevel pinion 43 is fixed to the first PTO shaft 21, meshes with a bevel gear 44 on the second PTO shaft 22, divides the PTO power into two systems, and takes out the power from the first PTO shaft 21 and the second PTO shaft 22. The rotation power of the first and second PTO shafts 21 and 22 can be stopped without stopping the rotation power of the wheel transmission shaft 20 by demagnetizing the electromagnetic clutch 38.

A rotation pulse sensor 45 is attached to the outer end of the rotation shaft 30 from the electromagnetic clutch 38. As the rotation pulse sensor 45, for example, one having a structure in which the proximity sensor counts the unevenness of the sprocket externally fixed to the rotation shaft 30 can be used. At the rear of the traveling machine body 12, a transplanting operation section 50 is provided. This transplant working unit 50
A seedling supply device 51 and a soil block seedling supplied from the seedling supply device 51 are ridged by a planting tube (planting means) 61.
4 and a multi-film perforating device 81 that preliminarily perforates a multi-film M at a position where a seedling is to be planted. The seedling supply device 51 is driven by the rotational power of the second PTO shaft 22, and the planting device 6
The zero and multi-punching device 81 is driven by the rotational power of the first PTO shaft 21.

The seedling supply device 51 is mounted on the main frame 15, and the seedling tray 46 in which a large number of pot portions 46a in which soil block seedlings are raised is arranged vertically and horizontally by the seedling feeding device 51A in the horizontal and vertical directions. While being transported in the direction, the soil block seedlings are taken out of the seedling tray 46 one by one by the seedling removal claw 52 at a predetermined seedling removal position with respect to the planting device 60, and the soil block seedlings are placed in the planting device 60. After being transported upward, it is dropped into the planting cylinder 61. The seedling tray 46 is made of resin and has flexibility, and is provided with a large number of pots 46a vertically and horizontally protruding from the rear surface, and soil block seedlings are raised in each pot 46a.

A transmission shaft 54 connected to the second PTO shaft 22 is connected to a power receiving shaft 53 of the seedling supply device 51 via a universal joint, and the above-described operation is repeated by the power from the transmission shaft 54. It is. As shown in FIGS. 4 and 5, the planting device 60 and the multi-film punching device 81 are provided with the first PT of the transmission case 19.
Planting frame 62 supported on O-shaft 21 to be able to swing up and down
Provided above. The planting frame 62 is mainly composed of square pipe-shaped left and right frames 62L and 62R, and a connecting frame 62A connecting the left and right frames 62L and 62R. A bracket 64 is detachably attached to a front end of the right frame 62R by a fixing tool such as a bolt 63, and a first bearing 65 provided on a front end of the bracket 64 and a front end of the left frame 62L.
The PTO shaft 21 is inserted and supported, and the planting frame 62 is detached from the traveling body 12 by removing the bracket 64, whereby the planting device 60 and the multi-perforation device 8 are removed.
1 can be integrally removed from the traveling body 12.

The rear end of the planting frame 62 is suspended from the main frame 15 so that the vertical position of the planting frame 62 can be adjusted. A soil covering ring 66 is provided at the rear of the planting frame 62. The planting device 60 includes a planting tube 61 that pierces and moves the ridge 14 so as to plant the soil block seedlings supplied from the plant supply device 51 on the ridge 14 at predetermined intervals. Oscillating link mechanism 6 that supports oscillating freely
7 and the main configuration. The swing link mechanism 67 includes a first parallel link 68 whose upper end is pivotally supported by the planting frame 62 so that the lower end can freely swing back and forth.
A swing plate 69 is pivotally connected to the lower end of the parallel link 68,
The front end of the second parallel link 70 is pivotally connected to the swing plate 69, and the planting cylinder 61 is connected to the rear end of the second parallel link 70.
Are connected.

The upper link 7 of the second parallel link 70
0a, a bearing 72 is fixed, and between the left and right frames 62L, 62R of the planting frame 62, left and right bearings 73 are provided.
(Drive shaft) 7 rotatably supported through the shaft
The crank arm 7 of the crank shaft 71 is provided.
A crank pin 71b between 1a is inserted into the bearing 72.

A sprocket 74 is provided at the left end of the crankshaft 72, and a transmission chain 76 is wound around the sprocket 74 and a sprocket 75 provided at the left end of the first PTO shaft 21. The rotation power is transmitted to the crankshaft 71. The sprockets 74 and 75 and the transmission chain 76 are covered with a chain case 77, and the chain case 77 has a tension roller 7 for adjusting the tension of the chain 76.
8 are provided.

Therefore, when the crankshaft 71 rotates by the power from the first PTO shaft 21, the first and second
The parallel link 68, 70 allows the planting tube 61 to swing back and forth while swinging up and down. When the planting tube 61 pierces the ridge 14 while traveling, the planting tube 6
1 does not move substantially forward with respect to the field.

The planting cylinder 61 is provided with an openable / closable opener at the lower portion. When the opener enters the ridge 14 at the lower end side of the locus of the planting tube 71, it is opened forward and backward by the interlocking tool 79, A transplant hole is formed in the ridge 14, and a soil block seedling can be planted in the transplant hole. A scraper 80 is provided on the rear side of the planting tube 61, and when the planting tube 61 is moved up by the swing link mechanism 67 after the planting tube 61 enters the ridge 14, the outside of the planting tube 61. The soil attached to the wall and the inner wall is scraped off.

The multi-film perforating apparatus 81 includes perforating means 82 constituted by a gas burner. The perforating means 82 is connected to the planting frame 62 via a parallel link 83 so as to be vertically movable. A cam roller 84 (cam engaging portion) is pivotally attached to the upper link 83a of the parallel link 83. The cam roller 84 rolls around the outer periphery of a disk-shaped cam 85 provided on the crankshaft 71, and drives the planting device 60 and the multi-perforation device 81 with the same crankshaft 71. This simplifies the apparatus and reduces costs. Further, the cam roller 84 is urged by the own weight of the punching means 82 in a direction of pressing the cam roller 84 against the outer periphery of the cam 85.

A concave portion is formed in a part of the cam 85 in the circumferential direction. When the cam roller 84 falls into the concave portion, the punching means 82 moves down by its own weight, and the punching means 82
By pressing a heating body 87 provided at the lower end of the multi-film M against the multi-film M, a transplant hole is formed in the multi-film M. The cam 85 is a multi-film M
Is formed so as to raise the piercing means 82 immediately after piercing, and the other part except for the recessed portion is provided with a drive shaft 71 for holding the piercing means 82 at a standby position as far as possible.
It is formed in an outer peripheral shape having a substantially constant distance from the axis.

As shown in FIGS. 1 and 2, a pair of left and right earth covering rings 66 provided at the rear of the planting frame 62
In the vicinity of the first planting position, the load of the rear part of the planting device 60 and the planting frame 62 is carried. The pair of left and right earth covering wheels 66 are also used for the rear vehicle height sensor 111. That is,
The rear vehicle height sensor 111 is the bracket 1 of the planting frame 62.
10 has a swinging rod 113 that is swingably supported around a support shaft 112 and a height detection roller 114 that is supported by the swinging rod 113 so as to be rotatable around a horizontal axis. It is provided at the back.

The swinging rod 113 is connected to the planting frame 62 via the height adjusting means 103. Height adjustment means 10
Reference numeral 3 denotes a locking plate 104 fixed to the planting frame 62, which is engaged with a step-shaped engaging portion formed on an engaging portion 105 protruding from the swinging rod 113. By changing the mating position, the distance between the height detecting roller 114 (covering ring 66) and the planting frame 62 can be changed, and the amount of the planting cylinder 61 protruding from the upper surface of the ridge 14, that is, the planting depth can be adjusted. I have to.

The height detecting roller 114 (the left and right earth covering wheels 6)
6) rolls the upper surface of the ridges 14 to cover and crush the planted block seedlings from the left and right.
Since it is attached to the planting frame 62, the height of the planting device 60, the multi-film perforating device 81, and the like is set to a required height while following the irregularities on the upper surface of the ridge 14.

The change in height of the rear vehicle height sensor 111 is interlocked with the hydraulic valve 117 of the lifting mechanism 96 via the planting frame 62, the lifting rod 115, and the lifting lever 116. The lifting rod 115 has a U-shaped connecting frame 118. The hydraulic valve 117 controls the hydraulic cylinder 95. Therefore, the vertical movement of the rear vehicle height sensor 111 causes the planting frame 62 and the lifting rod 115 to move.
By operating the hydraulic valve 117 via the lift lever 116 and the hydraulic cylinder 95, the transmission case 23 is vertically swung via the hydraulic cylinder 95, and the height of the traveling machine body 12 is adjusted by moving the drive wheel 3 relatively up and down. .

A front vehicle height sensor 119 is provided at a position in front of the planting means 61 and substantially corresponding to a fulcrum at the front of the planting frame 62. The front vehicle height sensor 119 includes a swinging rod 121 supported by the transmission case 19 so as to be swingable around a support shaft 120, and a height detection supported by a lower end of the swinging rod 121 so as to be rotatable around a horizontal axis. And a roller 122. An interlocking piece 123 projects upward from the swinging rod 121, and an upper end of the interlocking piece 123 is inserted into a middle part of the connection frame 118 and is urged rearward by a spring 126 provided on the front side in the connection frame 118. At the same time, it is urged forward by a spring 127 provided on the rear side in the connection frame 118, whereby the upper end of the interlocking piece 123 is held in the connection frame 118 so as to be able to move back and forth.

According to the configuration of the above-described embodiment, the traveling body 12 travels with the drive wheels 24 and the front wheels 26 grounded and straddling the ridges 14. The front part of the traveling body 12 is the shaft 21.
The planting frame 62, which is supported so as to be able to swing vertically, comprises a planting device 60 having planting means 61,
In the vicinity of the planting position, and the rear portion of the planting frame 62 is also carried by the covering wheel 66 that contacts the ridge 14.

When the height of the ridge 14 changes, the rear vehicle height sensor 111 swings up and down following the change in the height of the ridge 14. Elevating mechanism 96 via rod 115 and elevating lever 116
The hydraulic cylinder 95 of the elevating mechanism 96 is operated in conjunction with the vertical swing of the rear vehicle height sensor 111 to rotate the transmission case 23 supporting the driving wheels 3 with respect to the traveling machine body 12. Then, the traveling body 12 is moved up and down to a height corresponding to the height of the ridge 14. At this time, the front vehicle height sensor 119 also swings up and down following the height change of the ridge 14, but the vertical swing of the front vehicle height sensor 119 is absorbed by the springs 126 and 127 and interlocks with the hydraulic valve 117. Not the front vehicle height sensor 1
The vertical swing of 19 does not affect the lifting and lowering of the traveling body 12.

When the transplanter enters the ridge 14 at the start of planting or the like, the rear vehicle height sensor 111 must be located at a position deviated behind the end 14a of the ridge 14 as shown by a chain line in FIG. At this time, the front vehicle height sensor 1
19 is in contact with the ridge 14, and the earth covering ring 66 cannot be set on the ridge 14 and floats. Therefore, the front vehicle height sensor 119 swings up and down following the height change of the ridge 14, and the height change of the front vehicle height sensor 119 is caused by the planting frame 62 and the lifting rod 1.
15 and the hydraulic valve 117 of the elevating mechanism 96 via the elevating lever 116, so that the hydraulic cylinder 95 of the elevating mechanism 96 operates to support the drive wheels 3 in conjunction with the vertical swing of the front vehicle height sensor 119. Transmission case 23
2 to move the traveling body 12 up and down to a height corresponding to the height of the ridge 14. The traveling body 12 does not ride on the ridges 14 at the start of planting as in the related art.

FIGS. 6 and 7 show another embodiment, in which a front vehicle height sensor 119 is attached to a transmission case 19 by a support shaft 1.
The swinging rod 121 is swingably supported at about 20 and a height detecting roller 122 is supported at the lower end of the swinging rod 121 so as to be rotatable around a horizontal axis. A central portion of the swinging rod 121 is swingably supported by the transmission case 19 around the support shaft 120, and a height detecting roller 122 is rotatable around the horizontal axis at the front end of the swinging rod 121. And the upper end of the swinging rod 121 is
Is connected to the hydraulic valve 117 via the.

Rear vehicle height sensor 111 also used as earth covering wheel 66
Has a swinging rod 113 supported on the planting frame 62 so as to be able to swing around a support shaft 112, and a height detection roller 114 supported by the swinging rod 113 so as to be rotatable around a horizontal axis. A connecting piece 131 is provided at a base of the swinging rod 113, and the connecting piece 131 is connected to an upper part of the swinging rod 121 of the front vehicle height sensor 119 via a connecting body 132 and a connecting rod 133.

The connecting body 132 is provided with an arc-shaped long hole 134 centered on the support shaft 112. By inserting the pin 135 of the connecting piece 131 into the long hole 134, the connecting body 132 is connected to the connecting piece 131. On the other hand, they are connected so as to be relatively movable in the range of the elongated hole 134. In this case, when the height of the ridge 14 changes, the front vehicle height sensor 119 swings up and down following the height change of the ridge 14, and the height change of the front vehicle height sensor 119 is transmitted via the connecting rod 130. Hydraulic valve 1 of lifting mechanism 96
17, the hydraulic cylinder 95 of the elevating mechanism 96 is operated in conjunction with the vertical swing of the front vehicle height sensor 119 to rotate the transmission case 23 supporting the drive wheels 3 with respect to the traveling body 12, and The traveling body 12 is moved up and down to a height corresponding to 14 heights. At this time, the rear vehicle height sensor 111 also swings up and down following the change in the height of the ridge 14. Note that the rear vehicle height sensor 111
Does not interlock with the hydraulic valve 117 in the range in which the pin 135 moves in the elongated hole 134.

When the transplanter exits the ridge 14 at the end of planting or the like, the front vehicle height sensor 119 must be located at a position separated from the end 14b of the ridge 14 in front of the ridge 14 as shown by a chain line in FIG. However, at this time, the rear vehicle height sensor 111 is in contact with the ridge 14, and the height detection roller 114 of the front vehicle height sensor 119 cannot be set on the ridge 14 and floats. Accordingly, the rear vehicle height sensor 111 swings up and down following the height change of the ridge 14, and the height change of the rear vehicle height sensor 111 is controlled by the lifting mechanism 9 via the swinging rod 121 and the connecting rod 130.
6, the hydraulic cylinder 95 of the lifting / lowering mechanism 96 operates in conjunction with the vertical swing of the rear vehicle height sensor 111 to move the transmission case 23 supporting the driving wheels 3 to the traveling machine body 12. The traveling body 12 is moved up and down to a height corresponding to the height of the ridge 14.

When adjusting the planting depth, the swinging rod 113 is rotated around the support shaft 112 to rotate the planting frame 62.
The engagement position of the step-like engagement portion of the engagement portion 105 with the engagement plate 104 may be changed.
4, the connecting body 132, the connecting rod 133, and the swinging rod 121 do not move in conjunction with the vertical movement of the earth covering ring 66. Therefore, when adjusting the planting depth, the hydraulic valve 11 is used.
7 does not operate and does not affect the elevation of the traveling body 12.

FIG. 8 shows another embodiment, in which a connecting piece 139 projects upward from a swinging rod 113 of a rear vehicle height sensor 111, and this connecting piece 139 includes a first connecting rod 140 and a second connecting rod 141. And the front vehicle height sensor 11 via the connecting rod 133.
Nine swinging rods 121 are connected to the upper part. Connecting piece 13
9 is provided with an arc-shaped elongated hole 142 centered on the support shaft 112, and the elongated hole 142 has a pin 1 of the first connecting rod 140.
By inserting 43, connecting piece 139 is connected to first connecting rod 140 so as to be relatively movable within the range of elongated hole 142. First connecting rod 140 and second connecting rod 141
Are pivotally supported by a bracket 144 projecting from the planting frame 62 so as to be rotatable around a horizontal axis 145. The planting frame 62 and the connecting rod 133 are connected to a tension coil spring 146.
Are connected by

In this case, as in the case of the embodiment shown in FIGS. 6 and 7, the front vehicle height sensor 119 swings up and down in accordance with the change in the height of the ridge 14, and corresponds to the height of the ridge 14. The traveling body 12 is moved up and down to the height. When the transplanter leaves the ridge 14 at the end of planting or the like, the rear vehicle height sensor 111 swings up and down according to the change in the height of the ridge 14, and moves up and down the traveling machine body 12 to a height corresponding to the height of the ridge 14. I do. Further, when adjusting the planting depth, the pin 143 moves in the elongated hole 142, and when adjusting the planting depth, the hydraulic valve 117 does not operate and does not affect the elevation of the traveling machine body 12.

FIG. 9 shows another embodiment, in which a connecting piece 139 protrudes upward from a swinging rod 113 of a rear vehicle height sensor 111, and this connecting piece 151 includes a first connecting rod 140 and a second connecting rod 141. , A bell crank 151 and a connecting rod 133 to be connected to the upper part of the swinging rod 121 of the front vehicle height sensor 119. The first connecting rod 140 is provided with an arc-shaped elongated hole 152 centered on the support shaft 112, and by inserting the pin 153 of the connecting piece 139 into the elongated hole 152, the connecting piece 139 is connected to the first connecting rod 140. Is connected so as to be relatively movable in the range of the elongated hole 152. First connecting rod 140
And the second connecting rod 141 are pivotally supported so as to be rotatable about a horizontal axis. The bell crank 151 is pivotally supported by the main frame 15 so as to be rotatable around a horizontal axis 153. Again,
6 and 7, the front vehicle height sensor 119 swings up and down following the change in the height of the ridge 14, and moves the traveling body 12 to a height corresponding to the height of the ridge 14. Go up and down. When the transplanter leaves the ridge 14 at the end of planting or the like, the rear vehicle height sensor 111 swings up and down according to the change in the height of the ridge 14, and moves up and down the traveling machine body 12 to a height corresponding to the height of the ridge 14. I do. Further, when adjusting the planting depth, the pin 153 moves in the elongated hole 152, and when adjusting the planting depth, the hydraulic valve 117 does not operate and does not affect the elevation of the traveling machine body 12.

FIG. 10 shows another embodiment. The swinging rod 113 of the rear vehicle height sensor 111 has its front end pivotally supported by the bracket 110 of the planting frame 62 so as to be rotatable around the support shaft 112. A detection roller 114 is supported at the front halfway portion of the swinging rod 113 so as to be rotatable around a horizontal axis, and is provided at a central portion of the swinging rod 113 on a locking plate 104 fixed to the planting frame 62. An engaging portion 105 having a step-like engaging portion to be engaged is formed, and by changing the engaging position of the step-like engaging portion, the distance between the height detecting roller 114 (covering ring 66) and the planting frame 62 is changed. Is changed, and the amount of protrusion of the planting cylinder 61 from the upper surface of the ridge 14, that is, the planting depth can be adjusted. Further, between the rear end of the swinging rod 113 and the main frame 15, the swinging rod 1 is moved relative to the main frame 15 by a spring 155 so as to elastically press the earth covering ring 66 against the ridge 14.
An elastic pressing mechanism 156 for urging the rear end portion 13 downward is provided. The elastic pressing mechanism 156 changes the engaging position of the step-like engaging portion of the engaging portion 105 so as to raise the covering ring 66. When the amount of protrusion of the planting cylinder 61 from the upper surface of the ridge 14, ie, the planting depth, is increased, the spring 155 is compressed, and the height detecting roller 114 of the spring 155 (covering ring 66)
Of the planting cylinder 61 from the upper surface of the ridge 14 by changing the engagement position of the step-like engagement portion of the engagement portion 105 so as to lower the
That is, when the planting depth is reduced, the compression of the spring 155 is weakened, and the strength of the spring 155 pressing the height detecting roller 114 (covering ring 66) downward is weakened. Therefore, when the planting depth of the planting tube 61 is set to be large, the pressing force of the planting tube 61 against the ridge 14 becomes large in accordance with the increase in the repulsive force of the ridge 14 at the time of planting. At the same time, when the planting depth of the planting tube 61 is set to be small, the pressing force of the planting tube 61 against the ridge 14 becomes small corresponding to the decrease in the repulsive force of the ridge at the time of planting.

In other respects, the configuration is the same as that of the embodiment shown in FIGS. 1 to 5. The change in height of the rear vehicle height sensor 111 is interlocked with the hydraulic valve 117 of the lifting mechanism 96. I have. A front vehicle height sensor 119 is provided in front of the planting means 61 and at a position substantially corresponding to a fulcrum at the front of the planting frame 62.

[0047]

According to the present invention, when the transplanter 11 enters the ridge 14 at the start of planting or the like, or when the transplanter 11 exits the ridge 14 at the end of planting or the like, the ridge 14 is Even if it is cut, either the rear vehicle height sensor 111 or the front vehicle height sensor 119 swings up and down following the height change of the ridge 14, and travels to a height corresponding to the height of the ridge 14. Since the body 12 is moved up and down, the height of the body can be adjusted favorably.

[Brief description of the drawings]

FIG. 1 is an overall side view of a transplanter according to an embodiment of the present invention.

FIG. 2 is a side view of a planting frame and a vehicle height sensor.

FIG. 3 is a system diagram showing a power transmission system of a traveling system and a PTO system.

FIG. 4 is an overall schematic side view of the multi-film punching device and the planting device.

FIG. 5 is a plan view of the same.

FIG. 6 is an overall side view of an implanting machine showing another embodiment.

FIG. 7 is a side view of the planting frame and the vehicle height sensor.

FIG. 8 is a side view of a planting frame and a vehicle height sensor according to another embodiment.

FIG. 9 is a side view of a planting frame and a vehicle height sensor according to another embodiment.

FIG. 10 is a side view of a planting frame and a vehicle height sensor according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Running body 24 Driving wheel 61 Planting means 62 Planting frame 96 Elevating mechanism 111 Rear vehicle height sensor 119 Front vehicle height sensor

Continuation of the front page (56) References JP-A-5-6 (JP, A) JP-A-7-276961 (JP, A) JP-A-8-70636 (JP, A) JP-A-63-66408 (JP) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01C 11/00-11/02 303

Claims (3)

(57) [Claims] A traveling wheel (12) supports a driving wheel (24), and a planting frame (62) is supported by a front part as a fulcrum so as to be vertically swingable. ,
A transplanting machine provided with a planting means (61) for planting seedlings on a ridge (14) so as to be movable up and down, and a lifting mechanism (96) for lifting and lowering a traveling machine body (12) with respect to the driving wheel (24). , A rear vehicle height sensor (111) and a front vehicle height sensor (119) that swing up and down according to a change in the height of the ridge (14) are provided on the traveling body (12) side at a distance from each other. An interlocking mechanism for raising and lowering the elevating mechanism (96) is provided so as to move the elevating mechanism (96) up and down in conjunction with the vertical swing of the vehicle height sensors (111) and (119). Height adjustment device of the transplanting machine. The traveling body (12) supports a driving wheel (24), and a planting frame (62) is supported by a front part as a fulcrum so as to be vertically swingable. ,
A transplanting machine provided with a planting means (61) for planting seedlings on a ridge (14) so as to be movable up and down, and a lifting mechanism (96) for lifting and lowering a traveling machine body (12) with respect to the driving wheel (24). , A rear vehicle height sensor (111) is provided on the rear side of the traveling body (12) so as to swing up and down in accordance with a change in the height of the ridge (14). The lifting mechanism (9) is moved up and down in conjunction with the vertical swing.
6) is provided with an interlocking mechanism for raising and lowering, and a rear vehicle height sensor (111) is provided on the front side of the traveling body (12) with a ridge (1).
(4) a front vehicle height sensor (119) that swings up and down following a change in the height of the ridge (14) when the ridge (14) moves up and down to follow the height change of the ridge (14). Machine height adjustment device. 3. The driving body (12) supports a driving wheel (24), and a planting frame (62) is supported by a front part as a fulcrum so as to be vertically swingable. ,
A transplanting machine provided with a planting means (61) for planting seedlings on a ridge (14) so as to be movable up and down, and a lifting mechanism (96) for lifting and lowering a traveling machine body (12) with respect to the driving wheel (24). , A front vehicle height sensor (119) is provided on the front side of the traveling body (12) so as to swing up and down following a change in the height of the ridge (14). The elevating mechanism (9) is moved up and down in conjunction with the swing.
An interlocking mechanism for raising and lowering the vehicle body 6) is provided, and a front vehicle height sensor (27) is provided on the rear side of the traveling body (12) with a ridge (14).
A rear vehicle height sensor (111) that swings up and down following a change in the height of the ridge (14) when the ridge (14) moves away from the ridge (14) to move the lifting mechanism (96) up and down. Aircraft height adjustment device.