JPH02257803A - Planting depth controller in transplanter - Google Patents

Abstract

PURPOSE:To provide the title controller intended to seek accurate planting depth control at all times, so designed that a means to regulate the ground contact pressure for a ground contact body is provided to enable the responsiveness of the ground contact body to be maintained properly in conformity with farm conditions. CONSTITUTION:The planting depth for seedlings is kept uniform by putting a ground contact wheel to vertical movement against the machine body in conformity with the vertical motion of a ground contact body 176 being in contact with the farm surface. The ground contact body 176 is made to a plate- like form for leveling the upper surface of a ridge 200; at the same time, a side plate to form the normal plane of the ridge is integrally formed on the side of said body 176. Furthermore, by a pressure-regulating means comprised of a pressure-regulating spring 187, a wire 188 and a sensitivity-adjusting lever 189, the ground contact pressure of the body 176 is made controllable. As a result, the responsiveness of the ground contact body can be maintained properly in conformity with the farm conditions. leading to accurate planting depth control at all times.

Description

Detailed Description of the Invention A. Object of the Invention [Field of Industrial Application] The present invention relates to a planting depth control device for controlling the planting depth of seedlings in a vegetable transplanter or the like.

[Prior Art] A vegetable transplanter or other planter is configured to maintain a constant planting depth of seedlings by raising and lowering a grounding wheel relative to the body according to the vertical movement of a grounding body that is in contact with the field. There is a depth control device.

[Problems to be Solved by the Invention] However, the conventional planting depth control device described above depends on conditions such as soil quality and the presence or absence of mulch film.

There was a problem in that the vertical response of the grounding body to changes in ridge height was different, and the planting depth was not constant. There was also the problem that soil was pushed out onto the slope of the ridge by the grounding body, disturbing the slope.

Structure of the Invention [Means for Solving the Problems] In order to solve the above problems, the present invention has the following structure.

That is, the planting depth control device according to the present invention is as follows.

In a planting depth control device for a transplanter, which is equipped with a grounding body that touches the field, and maintains the planting depth of seedlings at a constant level by raising and lowering a grounding ring relative to the machine body according to the vertical movement of the grounding body. , the grounding body is formed into a plate shape for leveling the upper surface of the ridge, and a side plate for shaping the slope of the ridge is integrally formed on the side of the grounding body, and the ground pressure of the grounding body is further adjusted. The feature is that it is equipped with a pressure regulating means that allows
By adjusting the ground pressure of the grounding body using a pressure regulating means according to conditions such as soil quality and the presence or absence of mulch film, the responsiveness of the grounding body to changes in ridge height can be maintained appropriately, and accurate Planting depth can be controlled.

Further, as the transplant body advances, the upper surface of the ridge is leveled by the plate-shaped grounding body, and the slope of the ridge is shaped by the side plates, so there is no need for a separate ridge shaping operation.

[Example] The embodiments shown in the drawings will be described below.

This vegetable transplant Ja1 has a traveling part mission case 3 arranged at the rear of an engine 2 installed at the front end of the machine, and the front wheels are attached to the tips of rotary covers 5, 5 protruding from the left and right sides of the mission case. A transmission case 6.6 is provided diagonally downward at the rear, and a front wheel 7.7, which is a propulsion wheel, is attached to the lower end of this front wheel transmission case.
is pivoted.

A front transmission frame IO having a transmission shaft inside is fixedly connected to one rear side of the mission case 3 (on the left side in the illustrated example) and extends rearward, and a transplanted mission case 11 is provided at the rear end thereof. ing. A rear transmission frame 14 having a transmission shaft therein for transmitting power to a transplant device 13, which will be described later, extends rearward from the transplantation part mission case 11, and a handle support frame 15 is attached rearwardly to the rear end of the transmission frame 14. It is installed protrudingly. A control handle 17 is attached to this handle support frame 15 and a fixed plate 16 fixed thereto. Various operating levers etc. are attached. On the other hand, a side frame 20 is provided on the side opposite to the front transmission frame IO (on the right side in the illustrated example). connected. A bracket 22 having a U-shape in plan view is fixed to the horizontal frame 21, and a reinforcing frame 23 is provided between the bracket 22 and the fixing plate 16. The transmission case 3゜11 and each frame 10 of these traveling parts and transplant parts,
14, 15, 20, 21.

23 constitutes the body frame of this vegetable transplanting machine 1.

The bracket 2 is located at a lower rear position of the horizontal frame 21.
2 and a bracket 25 fixed to the transplanted part transmission case 11, a rear wheel support shaft 26 is horizontally suspended. A rear wheel support arm 27.27 is fixed to rotating tubes 26a, 26a which are rotatably fitted to both ends of the support shaft 26, and the left and right rear wheels 28.28 are attached to the lower end of the arm. supported.

Further, the rear wheel support shaft 26 is provided with a frame 32 that is gate-shaped in front view and has an earth digging device 30 and a soil covering device 31, which will be described later, attached thereto.

A seedling stand 45 is provided at the top of the machine body, and includes a movable frame 43 that is slidably supported in the left-right direction by front and rear rails 40 and 41, and a receiving frame 44 that is integrated with the rails 41. The moving frame 43 has a pair of front and rear rolls 48a, 48b.
A seedling feeding belt 48 is provided, which is stretched over the area to sequentially transport the placed pot-shaped seedlings rearward.

On the other hand, the receiving frame 44 has a seedling take-out port 50 formed in the left and right center portions, and an opening/closing body 51 is provided at the seedling take-out port to switch between a state in which the bottom of the seedling is received and a state in which it is not received by opening and closing up and down.

As a lateral movement device 60 for the moving frame 43, a bearing member 63 is provided at the tip of the seedling stand transmission case 62 fixedly connected to the work unit mission case 11 and at the protruding end of the horizontal frame 21.
a lead cam shaft 66 which is supported between
A lead metal 67 is fixed to the lead groove 3 and has a lead claw that slidably engages with the lead groove, and when the lead cam shaft 66 rotates, the moving frame 43 is reciprocated in the left and right direction. The seedlings in the last row located above the receiving frame 44 are sequentially supplied to the seedling outlet 50. When the moving frame 43 moves to the end of the left and right stroke, the ratchet lever 68 fixed to the end of the shaft of the drive roll 48a
is rotated in a predetermined direction by a seedling feed cam 69, and the seedling transfer belt 48 is operated to transfer the seedlings backward by one row.

The transplant device 13 includes a first
A rotation case 71, a second rotation case 72 and a transplant case 73 are provided, and the transplant case 73 has a pair of transplant claws 75.7.
5 and a seedling extrusion body 76 are provided. This transplant device 13
To explain the operation, the first rotating case 71 rotates counterclockwise in FIG. 1 at a predetermined speed corresponding to the rotational speed of the front wheel 7. (clockwise) at twice the speed, and the transplant case 73 moves vertically in an elongated elliptical orbit. During this time, the transplant case 73 and the transplant claws 75 and 75 attached thereto and the seedlings Extruded body 7
6 is held in the same position throughout. P in FIG. 1 indicates the trajectory of the tip of the transplanted nail, and at point A, that is, the position of the seedling extraction port 50, the seedling pushing body 76 pushes down the seedling held on the opening/closing body 51 and releases it into one seedling. It is divided into pot seedlings and is held by a pair of transplanted claws 75 and 75.

The opening/closing body 51 is opened in accordance with this operation. At point B, that is, at the bottom of the trajectory, the transplant claws 75 and 75 open to plant the seedlings in the field. At point 0, where the transplanted claw is slightly higher than point B, the seedling pusher 76 starts to move downward, and the transplanted claw 75
．． The seedlings are forcibly separated from the transplanted nails when they are lifted up while still attached to the nail.

The earth digging device 30 has upper and lower links Ill on the frame body 32,
112 is rotatably pivoted, and a mounting plate 114 pivotally connected to the rear tip of the upper and lower links has a pair of needle-shaped bodies l15 having an inverted U shape and sharp lower ends, and a pair of needle-shaped bodies l15 that are perpendicular to the direction of travel. A plate-like body l16 facing in the same direction is provided, and by intermittently moving up and down these needle-like bodies 115 and plate-like body 118, the upper surface of the ridge 200 leveled by the ridge forming tool 176 described later is provided. A transplant hole is then formed.

The soil covering device 31 has a pivot shaft 112a of the lower link 112.
A cover plate 134 is attached to the rear end of a support rod 131 connected to the support rod 131 via a universal joint 130. A pair of left and right soil covering plates 134, 134 are provided in a V-shape when viewed from the front, and by pressing the upper part of the ridge 200 diagonally inward from above, they cover the pot of the seedling after transplanting with soil. , compact the surrounding soil to ensure that the seedling is held in place.

The lateral movement device t60 for the moving frame explained above. Receiving frame opening/closing plate 51. Transplanting device 113, soil digging device 30 and soil covering! 131 are operated in synchronization with each other.

The lifting mechanism for the front and rear wheels, which are ground wheels, is hydraulic, and a hydraulic pump 15 is installed at the rear of the traveling part transmission case 3.
0 is integrally provided, and a hydraulic cylinder 152 and a hydraulic valve 153 are provided on a support stand 151 constructed between the front transmission frame 10 and the side frame 20. A balance rod 156 is pivotally attached to the rear end of the hydraulic cylinder 152 so as to be rotatable in a horizontal plane, and both left and right ends of the balance rod are protruded from the rotation cover cylinder 5.5 by front wheel connecting rods 165, 165. It is connected to arms 166, 166, and is also connected to arms 188, 168 protruding from rotating tubes 26a, 26a by rear wheel connecting rods 167, 167. The driving hydraulic cylinder 152 of the lifting mechanism is controlled by a planting depth control device 170, which will be described next.

A bracket 175 is pivotally supported by a shaft 173 at the front end of support plates 172, 172 protruding from a rotating shaft 171 installed horizontally on the bracket 22, 25. The ridge forming tool 17 is a grounding body of
6 is installed. The rotation shaft 171 can be rotated by a planting depth adjustment lever 177, and the lever can be moved into a predetermined groove 178a of the planting depth setting device 178.
It can be fixed at a desired angle by engaging with. The ridge forming tool 176 consists of a leveling plate part 176a extending rearward from the base and side plate parts 176b, 176b provided on both sides of the leveling plate part, and forms the ridge 200 when viewed from the front.
A cutout &176c into which the transplanted claw 65, 65, the needle-like body 115, and the plate-like body 116 are inserted is formed at the rear center of the leveling plate portion 176a.

The joint between the bracket 175 and the ridge forming tool 176 is shown in FIG.
With the configurations shown in a) and (b), the respective holes 180 are drilled in the bracket and the ridge former. ..., hole 181,...
・Connection pin 182. ... are connected by inserting the two, but the hole 181 of the ridge forming tool is connected to the connecting pin 1.
82, the ridge forming tool 176 can move forward, backward, left and right with respect to the bracket 175, and since the two are integrated by the elasticity of the spring 183, it can be easily moved from the field. In the illustrated example, which has a structure that can elastically absorb changes in reaction force, coupling pins 182 are arranged at three locations, one at the front and two at the rear. The number and position of are not limited to these.

One side of the bracket 175 is formed as an arm 175a rising upward, and its tip is connected to a spool 153a of a hydraulic valve by a connecting rod 185. Further, a pressure regulating spring 187 is attached to the tip of the arm 175a to bias it backward.

This pressure adjustment spring 187 is connected to a sensitivity adjustment lever 189 provided on the reinforcing frame 23 via a wire 188.

By operating the sensitivity adjustment lever, the pressure adjustment spring 187
The tension of the ridge forming tool 176, that is, the ground pressure of the ridge forming tool 176, which is a grounding body, can be adjusted.

During work, the leveling plate portion 176a is placed on the upper surface 200a of the ridge,
In addition, the side plate parts 176b and 178b are in sliding contact with the upper part of the slope 200b of the ridge, and move while leveling the top of the ridge 200, and the vertical movement corresponding to the change in height of the ridge is controlled by the hydraulic valve via the connecting rod 185. It is transmitted to the spool 153a.

When the ridge becomes higher and the rear part of the ridge forming tool 176 moves upward, the spool 153a is pushed in via the arm 176 and rod 177, and the hydraulic valve 153 is switched in the direction of extending the hydraulic cylinder 152. When the hydraulic cylinder extends and the balance rod 156 moves rearward, the arms 156, 156, 1
58.158 is rotated, front wheel 7.7 and rear wheel 2
8.28 moves down at the same time and the aircraft is lifted up. Conversely, when the ridge becomes lower and the rear part of the grounding body 173 moves downward, the aircraft body is lowered. in this way.

The planting depth control device 1170 moves the machine up and down as appropriate in response to changes in the height of the ridge, so that the planting work is always performed under constant conditions and at a constant planting depth.

The planting depth is adjusted by adjusting the reference height of the ridge forming body 176 using the planting depth adjustment lever 177. When the lever 177 is raised as shown by the solid line in FIG. When the height Hl is high and the planting depth is shallow, and the lever 177 is lowered as shown by the chain line, the reference height H2
is low and the planting depth is shallow.

When the planting depth is adjusted with the lever 177, the ridge forming tool 176
The sensitivity for controlling the planting depth changes because the elevation angle of the plant changes. That is, when the lever 177 is lowered to perform shallow planting, the angle of elevation of the ridge forming tool 176 increases and the sensitivity becomes more sensitive. On the other hand, when the lever 177 is lifted to perform deep planting, the elevation angle of the ridge forming tool 176 becomes smaller, making the sensitivity less sensitive. In addition, even if the angle of the ridge forming tool 176 is constant, the sensitive age changes depending on conditions such as changes in soil quality and the presence or absence of mulch film. Adjust the ground pressure with 187 etc. 0 For example, if the soil is hard or covered with mulch film, lower the ground pressure to make the control sensitivity less sensitive, and if the soil is soft, increase the ground pressure to increase the control sensitivity. Just do it like this.

[Effect of the Invention J As is clear from the above description, the planting depth control device according to the present invention is provided with a pressure regulating means for regulating the ground pressure of the grounding body, so that it can be adjusted to suit the field conditions. The responsiveness of the grounding body can be maintained at an appropriate level, allowing accurate planting depth control at all times.

Further, since the side plate for forming the slope of the ridge is integrally provided on the side of the grounding body, the upper part of the ridge is formed at the same time, and beautiful ridges without disturbance can be maintained.

[Brief explanation of drawings]

Fig. 1 is an overall side view of the vegetable transplanting machine according to the present invention;
The figure is a plan view with some parts omitted, Figure 3 is a perspective view of the main part,
Fig. 4 is a side view thereof, Fig. 5 is a plan view thereof, Fig. 6 is a diagram showing the configuration of the planting depth control device, Fig. 7 is a front view of the ridge forming tool, Fig. 8(a), (b) is an explanatory view of the joint portion between the bracket and the ridge forming tool. DESCRIPTION OF SYMBOLS 1... Vegetable transplanter, 7... Front wheel, 13... Transplant device, 28... Rear wheel, 30... Soil digging device, 31...
- Soil covering device, 45... Seedling stand, 170... Planting depth adjustment device, 175... Bracket, 176... Ridge forming tool (grounding body), 176a... Leveling plate part, 176b・
...Side plate part, 177...Planting depth adjustment lever, 187
... Pressure adjustment spring, 189 ... Sensitivity adjustment lever, 200
...ridge.

Claims (1)

[Claims] (1) Planting depth of a transplanter that is equipped with a grounding body that makes contact with the field, and that maintains the planting depth of seedlings at a constant level by raising and lowering the grounding ring relative to the body according to the vertical movement of the grounding body. In the control device, the grounding body is formed into a plate shape for leveling the upper surface of the ridge, and a side plate for shaping the slope of the ridge is integrally formed on the side of the grounding body, and the grounding pressure of the grounding body is controlled. A planting depth control device characterized by being provided with pressure regulating means that can be adjusted.