JPH0956221A - Body height adjustment device for transplanter - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To make it possible to control a planting depth with higher accuracy and high responsiveness. SOLUTION: A planting frame 62 is provided with a planting device 61 so as to be vertically movable, and a soil cover member 66 for covering the seedlings after planting is provided behind the planting device 61, and the drive wheel 24 is provided. In the transplanter provided with the elevating mechanism 96 for elevating and lowering the traveling machine body 12, the soil cover member 66 swings the planting frame 62 up and down on the rear side of the planting frame 62 in conjunction with its vertical movement. The actuating member 110 for raising and lowering the elevating mechanism 96 is connected to the midway portion of the planting frame 62 via the bell crank 108 located above the planting means 61.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body height adjusting device for a transplanting machine, in which vegetable seedlings such as lettuce and cabbage are sequentially transplanted to ridges while running.

[0002]

2. Description of the Related Art A transplanter for upland fields for transplanting potted seedlings (soiled seedlings) such as vegetables is disclosed in Japanese Patent Laid-Open No. 5-6 as a traveling machine body, drive wheels, and ridges. A planting device for planting seedlings and a soil cover wheel for covering the soil near the planting position of the planter are provided, and an elevating mechanism for elevating the traveling machine body with respect to the drive wheels is provided.

In the planting device, a seedling box having a large number of pots in the vertical and horizontal directions is curved and vertically fed, and earthed seedlings are extruded from the pots and delivered to a planting cylinder for planting. Has become. The planting depth is roughly controlled by detecting the ridge height with a detection roller in front of the planting position, and the ridge height at the planting position is detected with the ground roller provided on the drive wheel side. Control the planting depth finely.

[0004]

In the control of the planting depth of the prior art, both the detection roller and the ground roller move up and down relative to the planting cylinder of the planting device, so that the traveling machine body is raised and lowered. The mechanism becomes complicated, it is difficult to increase the control response, and when the ridge height varies, a height difference may occur with respect to the planting cylinder.

The present invention utilizes the fact that the soil-covering wheel supported by the movable frame together with the planting device is grounded on the ridges in the vicinity of the planting position of the planting cylinder, and controls the lifting mechanism by the movable frame that moves up and down together with the soil-covering wheel. By doing so, it is an object of the present invention to provide a body height adjusting device for a transplanter in which the planting depth can be controlled with higher accuracy and higher responsiveness.

[0006]

The concrete means for solving the problems in the present invention is that the drive wheels 24 are supported by the traveling machine body 12 and the planting frame 62 is vertically swingable about the front part as a fulcrum. Supported by the planting frame 62, a planting means 61 for planting seedlings in the ridges is provided so as to be movable up and down, and a soil covering member 66 for covering the seedlings after planting is provided behind the planting means 61. In the transplanter provided with an elevating mechanism 96 for elevating and lowering the traveling machine body 12 with respect to the drive wheels 24, the soil cover member 66 is interlocked with the vertical movement of the soil cover member 66 on the rear side of the planting frame 62. And an operating member 110 for vertically moving the elevating mechanism 96 in the middle of the planting frame 62.
Is located above the planting means 61.
It is that it is connected through.

The second concrete means for solving the problem in the present invention is that the planting frame 62 is the first lifting rod 10.
7, a shock absorber 113 is provided between the bell crank 109 and the second elevating rod 109, which is interlocked with the actuating member 110 through the 7, the bell crank 108, and the second elevating rod 109. A third concrete means for solving the problem in the present invention is that a bell crank 109 is connected with a play frame 114 bent in a U-shape, and a second U-shaped portion 115 of the play frame 114 is connected to a second part. The elevating rod 109 is slidably inserted, and the compression springs 11 are formed inside and outside the U-shaped portion 115 of the second elevating rod 109, respectively.
By fitting 6 in, the buffer means 113 is configured, and the elastic force of the compression spring 116 can be adjusted.

Therefore, the traveling vehicle body 12 travels in a state where the drive wheels 24 and the front wheels 26 are in contact with each other and the ridges 14 are straddled. The planting frame 62 whose front part is supported by the traveling machine body 12 so as to be swingable up and down about the shaft 21 is elastically supported by the traveling machine body 12 at its rear part and has a planting means 61.
And a soil covering member 66 for covering the soil in the vicinity of the planting position of the planting means 61, and the rear portion of the planting frame 62 is also carried by the soil covering member 66 grounded to the ridges 14.

When the height of the ridges 14 changes, the height of the soil cover member 66 that is in contact with the ridges 14 also changes, resulting in the planting frame 62.
Swings up and down around the front. At this time, the planting device 60
Is supported by the planting frame 62, the soil cover member 66
There is no relative up and down movement, and seedlings are always planted in the ridge 14 at a constant depth. By vertically swinging the planting frame 62, the operating member 10 of the hydraulic valve 14 is operated via the first elevating rod 107, the bell crank 108, the second elevating rod 109, and the operating member 110, and the operating member 10 is operated. The hydraulic cylinder 95 of the lifting mechanism 96 is operated to rotate the transmission case 23 supporting the drive wheels 3 with respect to the traveling body 12, and the traveling body 12 is elevated and lowered to a height corresponding to the height of the ridges 14 at that time. To do.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, the vegetable transplanter 11 is a walking type having a steering handle 13 at the rear part of the traveling machine body 12, travels in the longitudinal direction across the ridges 14, and the soil block seedlings are covered with the mulch film M. The ridges 14 are planted at predetermined intervals.

The traveling machine body 12 includes a main frame 15 and a pedestal 16 provided at the front end of the main frame 15. The main frame 15 is formed of a square pipe or the like, and a front portion thereof is bent downward and fixed to a side portion of the pedestal 16, and a rear portion thereof is bent upward, so that the steering handle 1
It is supposed to be the attachment part of 3. The engine 17 is mounted on the frame 16.
Is mounted, the engine 17 is covered with a hood 18, a mission case 19 is fixed to the rear portion of the gantry 16, and the power of the engine 17 is transmitted to a power transmission mechanism in the mission case 19.

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.
Left and right drive 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 be vertically swung around its axis.
Are supported, and 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. A ridge height detection roller 27 is provided.

The left and right transmission cases 23 can be vertically swung around the axis of the wheel transmission shaft 20 to adjust the relative vertical positions of the drive wheels 24 and the traveling vehicle body 12. Therefore, the hydraulic cylinders 95, etc. And an elevating mechanism 96 having That is, the left and right transmission cases 23 are vertically swung by the hydraulic cylinders 95 of the lifting mechanism 96 to move the ridges 14 of the traveling machine body 12 up and down.
The height from can be adjusted.

FIG. 4 shows a power transmission system for the traveling system and the PTO system, and the power of the engine 17 is the winding transmission means 28.
Is transmitted to the input shaft 29. Mission case 19
The rotary shaft 30, the intermediate shaft 31, the back shaft 32, the wheel transmission shaft 20, and the first PTO shaft 21 are rotatably supported in parallel with the input shaft 29, and the second PTO shaft 2 in the front-rear direction is
2 is provided so as to project 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 elastically pressed in the direction in which it engages with the free rotation gear 33, and constitutes a pawl-type main clutch.

Between the rotating shaft 30 and the intermediate shaft 31,
A transmission 35 that can be switched between first speed (F ₁ ), second speed (F ₂ ), third speed (F ₃ ), neutral (N), and reverse (R).
Is provided. Further, the 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 fixedly mounted on 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 winding transmission body 25 in the drive wheel 3, and the drive wheels 24 can be driven.

One end of the rotary shaft 30 projects from the mission case 19, an electromagnetic clutch 38 is fixed to the outer end thereof, and a cylindrical cup-shaped cup surrounds the outer end of the rotary shaft 30. A ring shaft 39 is rotatably supported by the transmission case 19, and the electromagnetic clutch 38 operates so that the rotary shaft 30 and the coupling shaft 39 rotate integrally, so that the PTO system power 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, and the PTO system power is branched into two systems to be taken out from the first PTO shaft 21 and the second PTO shaft 22. By demagnetizing the electromagnetic clutch 38, the rotational power of the first and second PTO shafts 21 and 22 can be stopped without stopping the rotational power of the wheel transmission shaft 20.

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, a structure in which the proximity sensor counts the unevenness of the sprocket externally fitted and fixed to the rotation shaft 30 can be used. A transplant work unit 50 is provided at the rear of the traveling machine body 12. The transplant work unit 50 is
The seedling supply device 51 and the soil block seedlings supplied from the seedling supply device 51 are ridged by a planting cylinder (planting means) 61.
4 has a planting device 60 for planting, and a multi-film punching device 81 for punching holes for transplantation in the multi-film M in advance at positions where seedlings are planted. The seedling supply device 51 is driven by the rotational power of the second PTO shaft 22, and the planting device 6
0 and the multi-punching device 81 are driven by the rotational power of the first PTO shaft 21.

The seedling supply device 51 is mounted on the main frame 15, and transfers the seedling tray 46 in which a large number of pot portions 46a where the soil block seedlings are raised are arranged in a row and a row in the horizontal and vertical directions. After taking out the soil block seedlings one by one from the seedling tray 46 with the seedling removal claw 52 at a predetermined seedling removal position with respect to the planting device 60, and transferring the soil block seedlings above the planting device 60, Planting cylinder 6
It is designed to be dropped into 1. The seedling tray 46 is made of resin and has flexibility, and is provided with a plurality of pot portions 46a arranged vertically and horizontally so as to project to the back surface, and soil block seedlings are raised in each pot portion 46a.

A power transmission shaft 54 connected to the second PTO shaft 22 is connected to the power receiving shaft 53 of the seedling supplying device 51 via a universal joint, and the above-described operation is repeated by the power from the power transmission shaft 54. Be done. As shown in FIGS. 5 and 6, the planting device 60 and the multi-film punching device 81 are the first PT of the mission case 19.
A planted frame 62 supported on the O-axis 21 so as to be vertically swingable
Provided above. The planting frame 62 is mainly composed of right and left frames 62L and 62R each having a square pipe shape, and a connecting frame 62A for connecting the left and right frames 62L and 62R. A bracket 64 is detachably attached to the front end of the right frame 62R by a fixture such as a bolt 63, and a first bearing is provided on a bearing 65 provided at the front end of the bracket 64 and the front end of the left frame 62L.
The PTO shaft 21 is inserted and supported, and the bracket 64 is removed to remove the planting frame 62 from the traveling machine body 12.
1 can be integrally removed from the traveling body 12.

The rear end portion of the planting frame 62 is suspended from the main frame 15 so that the vertical position thereof can be adjusted, and a soil cover member 66 is provided on the rear portion of the planting frame 62. The planting device 60 includes a planting cylinder 61 that is pierced into the ridges 14 to move the soil block seedlings supplied from the seedling feeding device 51 into the ridges 14 at predetermined intervals, and the planting cylinders 61 up and down. Swing link mechanism 6 that swingably supports
It is mainly composed of 7 and 7. 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 swing back and forth.
The 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 attached to the rear end of the second parallel link 70.
Are linked together.

The upper link 7 of the second parallel link 70
A bearing 72 is fixed to 0a, and a left and right bearing 73 is provided between the left and right frames 62L and 62R of the planted frame 62.
(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 the sprocket 75 provided at the left end of the first PTO shaft 21 to allow the engine 17 to rotate. Rotational 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, the power from the first PTO shaft 21 causes the crankshaft 71 to rotate, so that the first and second PTO shafts 21 rotate.
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.

Further, the planting cylinder 61 is provided with an opener that can be opened and closed at the lower part, and the opener opens forward and backward by the interlocking device 79 when it enters the ridge 14 at the lower end side of the locus of the planting cylinder 71, A transplant hole is formed in the ridge 14, and a soil block seedling can be planted in the transplant hole. Further, a scraper 80 is provided on the rear side of the planting cylinder 61, and outside of the planting cylinder 61 when the planting cylinder 61 is moved up by the swinging link mechanism 67 after being thrust into the ridges 14. The soil that adheres to the walls and inner walls is scraped off.

The multi-film punching device 81 is provided with a punching means 82 composed of a gas burner, and the punching means 82 is vertically movably connected to the planting frame 62 via a parallel link 83. 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 on the outer circumference of a disk-shaped cam 85 provided on the crankshaft 71, and drives the planting device 60 and the multi-punching device 81 with the same crankshaft 71. As a result, the device is simplified and the cost is reduced. Further, the self-weight of the perforating means 82 urges the cam roller 84 in the direction of pressing it against the outer periphery of the cam 85.

A concave portion is formed in a part of the circumferential direction of the cam 85, and when the cam roller 84 falls in the concave portion, the perforating means 82 is moved downward by its own weight, and the perforating means 82.
By pressing the 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 immediately raise the piercing means 82 after piercing the piercing hole, and the other portions except the recessed portion have the drive shaft 71 for holding the piercing means 82 in the standby position at the upper limit.
The outer peripheral shape is formed so that the distance from the axis is substantially constant.

1 and 2, the planting frame 6 is shown.
The pair of left and right soil cover members 66 provided at the rear of the
The load of the rear part of the planting device 60 and the planting frame 62 is carried in the vicinity of the planting position 1. A front end of a support rod 102 supporting a soil covering member 66 is pivotally supported on a column 101 hanging from the planting frame 62, and a rear end of the support rod 102 is connected to the planting frame 62 via height adjusting means 103. There is.

The height adjusting means 103 engages a locking plate 104 fixed to the planting frame 62 with a step-like engaging portion formed on an engaging piece 105 projecting from the supporting rod 102,
By changing the engaging position of the step-like engaging portion, the distance between the soil cover member 66 and the planting frame 62 can be 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. I have to.

The right and left soil cover members 66 roll over the upper surface of the ridges 14 to cover the planted block seedlings from the left and right and also to suppress the soil. Further, the right and left soil cover members 66 are attached to the planting frame 62. The height of the device 60, the multi-film punching device 81, etc. is set to the required height while following the unevenness on the upper surface of the ridge 14. The change in height of the soil cover member 66 is linked to the hydraulic valve 111 of the elevating mechanism 96 via the first elevating rod 107, the bell crank 108, the second elevating rod 109, and the operating member 110. Hydraulic valve 1
Reference numeral 11 controls the hydraulic cylinder 95. Therefore, the first lifting rod 107 is moved by the vertical movement of the planting frame 62.
The actuating member 110 is swung through the push and pull of the bell crank 108 and the second lifting rod 109 to swing the hydraulic valve 11
1 to operate the transmission case 23 via the hydraulic cylinder 95.
The height of the traveling machine body 12 is adjusted by swinging up and down and moving the drive wheels 3 up and down relatively.

An operating lever 112 is in contact with the actuating member 110, and the operating lever 112 can be remotely operated by a manual lever provided in the steering handle 13 or in the vicinity thereof. It is used to operate the mechanism 96 to lift the traveling mechanism 12. Bell crank 1
Although 09 is directly connected to the upper end of the first elevating rod 107, a buffer means 113 is provided between the bell crank 109 and the second elevating rod 109. That is, a play frame 114 whose front portion is bent in a U shape is connected to the lower end of the bell crank 109, and the second elevating rod 109 is slidably inserted into the U shape portion 115 of the play frame 114. In addition, the compression springs 116 are fitted inside and outside the U-shaped portion 115 of the second elevating rod 109 to urge the second elevating rod 109 forward and backward. Therefore, when the play frame 114 moves back and forth due to the swing of the bell crank 108, one of the compression springs 116 inside and outside the U-shaped portion 115 is compressed, and the elastic force due to the compression of the compression spring 116 is buffered. The actuating member 110 does not rock unless it acts and exceeds a certain force. For example, as shown in FIG. 1, the cushioning means 113 allows the range of 30 cm above and below the neutral position for the soil cover member 66 to be set as a dead zone for adjusting the height of the body, and for the planting cylinder 61, the vertical range from the neutral position. The range of 25 cm can be set as the dead zone for adjusting the aircraft height.

The spring receiver 118 for stopping one end of each compression spring 116 can be fixed in the longitudinal direction of the second elevating rod 109 so that its position can be adjusted, and the elastic force of the compression spring 11 can be adjusted by adjusting the position of the spring receiver 118. Can be adjusted. A turnbuckle 119 for adjusting the length is provided in the middle of the second elevating rod 109.

[0034]

According to the present invention, the soil cover member 66 is provided on the rear side of the planting frame 62 so as to swing the planting frame 62 up and down in conjunction with its vertical movement. An actuating member 110 for raising and lowering the raising and lowering mechanism 96 is connected to a middle portion of the ridge 14 through a bell crank 108 located above the planting means 61, so if the height of the ridge 14 changes, it will be covered with soil. The height of the planting means 61 can be changed by detecting the member 66 and vertically swinging around the front part of the planting frame 62 as a fulcrum, and the planting depth set by the soil covering member 66 can be maintained with high accuracy. By vertically swinging the planting frame 62, the elevating mechanism 8 is operated via the actuating member 110, and the height of the traveling machine body 12 can be changed and adjusted according to the height change of the ridges 14.

Further, since the actuating member 110 is connected to the middle portion of the planting frame 62 via the bell crank 108 located above the planting means 61, the planting frame 6
The vertical swing of 2 is performed by the actuating member 1 via the bell crank 108.
It can be easily and surely linked to 10, and the bell crank 1
Since they are connected via 08, the height of the planting means 61 can be changed accurately.

The planting frame 62 includes a first elevating rod 107, a bell crank 108, and a second elevating rod 109.
Is linked to the actuating member 110 via
09 and the second lifting rod 109 between the buffer means 113.
The height of the traveling machine body 12 is not changed and adjusted by the small vertical movements of the soil cover member 66, and no inconvenience is caused in the work. Moreover, the degree of the buffering action of the buffering means 113 can be appropriately set and adjusted according to the field and the like, which is very convenient.

[Brief description of drawings]

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

FIG. 2 is a plan view of the same.

FIG. 3 is an overall side view of the transplanter.

FIG. 4 is a system diagram showing a power transmission system of a traveling system and a PTO system.

FIG. 5 is an overall schematic side view of a multi-film punching device and a planting device.

FIG. 6 is a plan view of the same.

[Explanation of symbols]

 12 traveling machine body 24 drive wheel 61 planting means 62 planting frame 66 soil covering member 96 elevating mechanism 107 first elevating rod 108 bell crank 109 second elevating rod 110 actuating member 113 shock absorbing means 114 play frame 115 U-shaped portion 116 compression spring

Claims (3)

[Claims] 1. The traveling vehicle body 12 supports the drive wheels 24, and the planting frame 62 is swingably supported about the front portion as a fulcrum, and the planting frame 62 planting seedlings in ridges. The means 61 is provided so as to be movable up and down, a soil cover member 66 for covering the seedlings after planting is provided behind the planting means 61, and an elevating mechanism 96 for elevating the traveling machine body 12 with respect to the drive wheels 24. In the transplanting machine provided with, the soil cover member 66 is provided on the rear side of the planting frame 62 so as to swing the planting frame 62 up and down in conjunction with the vertical movement of the soil covering member 66. In addition, the actuating member 110 for raising and lowering the raising and lowering mechanism 96 is provided with the planting means 61.
A body height adjusting device for a transplanter, wherein the device is connected via a bell crank 108 located above. 2. The planted frame 62 is the first lifting rod 1
07, the bell crank 108, and the second elevating rod 109, and is linked with the operating member 110.
The height adjusting device for a transplanter according to claim 1, wherein a buffer means 113 is provided between the second lifting rod 109 and the second lifting rod 109. 3. A play frame 114 bent in a U-shape is connected to the bell crank 109, and the play frame 114 is formed.
The second elevating rod 109 is slidably inserted into the U-shaped portion 115, and the compression springs 116 are fitted inside and outside the U-shaped portion 115 of the second elevating rod 109, respectively. The body height adjusting device for a transplanter according to claim 2, wherein 113 is configured and the elastic force of the compression spring 116 is adjustable.