JP3025131B2 - Rice 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 seedling planting apparatus which is connected to a traveling machine body by a driving mechanism so as to be able to be driven up and down by a driving mechanism. And a control means for controlling the drive mechanism based on information detected by the ground pressure detecting means. At a lateral portion of the ground float, a fertilizer is supplied to a mud surface by a groove generator. The present invention relates to a rice transplanter configured to create a groove for planting and to plant seedlings.

[0002]

2. Description of the Related Art In the above rice transplanter, conventionally, a ground float is supported so as to be able to swing up and down around a rear fulcrum, and a change in the ground pressure is detected as a vertical swing amount of the ground float, and the detected value is set to a set value. To automatically control the drive mechanism so that
And the ditch device is attached to and fixed to the grounding float, and seedlings are located on the side of the grounding float .
The ground leveling action at the planned slope was performed by a wide portion formed on the front side of the ground float (for example, see Japanese Utility Model Laid-Open No. 3-67512).

[0003]

The above-mentioned conventional structure utilizes a grounding float having a wide grounding surface to effectively detect fluctuations in the grounding pressure against the muddy surface so that the seedling planting apparatus is at an appropriate level. Although it is designed to control the raising and lowering, a groove generator for forming a fertilizer application groove is attached and fixed to the ground float, and this groove generator always enters the mud deeper than the bottom surface of the ground float Due to the configuration, the grooving device may climb on a lump of straw or weeds existing in the mud, and the ground float may be pushed upward. Then, the vertical fluctuation amount of the ground float becomes a value different from the fluctuation of the mud surface ground pressure, and there is a possibility that the lifting control operation cannot be performed with high accuracy. In addition, the grounding float in the conventional structure is configured to have a ground leveling function at a place where the seedlings are to be planted. However, if the downward pressing force is set to a large value in order to exert a sufficient leveling function, the mud surface grounding pressure is reduced. In this case, the accuracy of detecting the fluctuation of the pressure decreases, and there is a problem that it is difficult to set the downward pressing force. An object of the present invention is to eliminate the above-mentioned disadvantages.

[0004]

According to a feature of the present invention, in the rice transplanter described at the outset, the above-mentioned groove generator is attached and fixed to a frame member of the above-described seedling planting apparatus, and the seedling is planted.
The present invention is characterized in that a leveling tool for leveling an expected location is elastically retractably supported on the frame member.

[0005]

[Function] Since a groove generator for creating a fertilizer groove is fixed to a frame member of a seedling planting apparatus, the groove generator may be mounted on a clump of straw or weeds. However, it is not affected at all by the detection of fluctuation in the ground pressure of the ground float. In addition, since the ground leveler for leveling the seedling planting area is also supported by the frame member, the elastic pressing force can be set to a level suitable for the leveling function, and the downward pressing force on the grounding float varies independently from the mud surface ground pressure. It can be set to one suitable for detection.

[0006]

Therefore, the variation of the mud surface contact pressure can be detected effectively by a large contact float on the contact surface and accurately by an appropriate downward pressing force. Resistance can be effectively eliminated,
It has become possible to provide a rice transplanter that can accurately perform the lifting control operation.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a riding rice transplanter. This rice transplanter is configured such that a seedling planting device 3 is connected to a rear part of a riding type traveling machine body 1 via a link mechanism 2 so as to be able to move up and down by a lift cylinder CY (an example of a drive mechanism).

The seedling plant 3 is provided with a square pipe-shaped main frame 4 [an example of a frame member] over substantially the entire width in the horizontal direction. The main frame 4 is connected to the link mechanism 2 and A feed case 5 to which the power of the traveling machine body is supplied is mounted and fixed, and a plurality of planting cases 6 are connected and fixed in a cantilever shape toward the rear side to form a frame body. A plurality of seedling stands 7 are supported so as to be reciprocally movable with a constant stroke with respect to the frame body, and seedlings are taken out one by one from the lower end of the seedling stand 7 at the rear of each planting case 6 and planted. Planting mechanism 8
And three ground floats 9a, 9b, 9 at the lower end.
c are deployed in parallel. The planting mechanism 8 pivotally supports the pair of planting claw support cases 11, 11 so as to be relatively rotatable on a rotating case 10 rotatably mounted around the horizontal axis with respect to the planting case 6. The planting claws 12, 12 are configured to rotate relative to each other while drawing a substantially elliptical locus in a side view by a gear mechanism (not shown) in the case in accordance with the rotation drive of 10, so as to perform a seedling extracting operation.

The seedling planting apparatus 3 is provided with a fertilizing apparatus 13 for supplying fertilizer to a lateral portion of each planting strip.
The fertilizer applicator 13 guides down a predetermined amount of fertilizer from a hopper 14 for storing the fertilizer via a feeding mechanism 15 through a downflow pipe 16 and is formed on a mud surface by a groove generator 17. It is configured to supply fertilizer into the fertilization groove.

[0010] A variation amount of the ground contact pressure applied to the ground float 9b located at the center in the left and right direction is detected, and the lift cylinder CY is controlled based on the detected information, so that the seedling planting apparatus 3 is controlled according to the hardness of the mud. A control device 18 is provided as control means for always maintaining a constant ground height. That is, FIG.
As shown in the figure, the rear end of the support arm 19 for pivotally supporting the rear side of the center ground float 9b is provided so as to be relatively rotatable within a predetermined rotation range, and the ground float 9b moves up and down while following the mud surface. And the support arm 19
The relative rotation amount on the rear end side is detected by a potentiometer PM1, and as shown in FIG. 4, the relative height with respect to the left and right ground floats 9a, 9c, that is, the left and right ground float 9
a, 9c, that is, the vertical displacement of the central ground float 9b based on the fluctuation of the ground pressure is determined from the detected amount of the potentiometer PM1, and the detected value of the potentiometer PM1 is maintained at the set value. The control device 18 switches and controls the electromagnetic control valve V for the lift cylinder CY so that the seedling planting device 3 is maintained at the set ground height.

As shown in FIGS. 2 and 3, a groove forming device 17 located on the lateral side of the center ground float 9b is fixedly mounted on the main frame 4, and moves up and down of the ground float 9b. Regardless, the amount of intrusion is always maintained at a constant depth, and even if there is lump or the like in the mud, it acts to guide the lump into the soil. or,
On the side opposite to the ground float 9b of the groove generator 17, a ground adjuster 20 for leveling a field scene of a place where the seedlings are planted by the planting claws 12 is attached so as to be able to swing up and down around the horizontal axis X. . With the leveling device 20 is pressed and urged downward by a predetermined grading for pressing force by the spring 21 and a plate-like, configured to rotation restriction by a predetermined range by the stopper 22, seedlings
Is formed in the place where the planting is to be planted. The groove maker 1 of the above-mentioned leveling implement 20
Potentiometer PM for detecting the relative rotation amount with respect to 7
2, the detection value of the float-side potentiometer PM1 is appropriately corrected based on the detection value of the potentiometer PM2.

[Another Embodiment] As a configuration for detecting a change in the mud surface ground pressure of the center ground float 9b, the fulcrum arm 19 is provided so as to be relatively rotatable, and the rear fulcrum position of the ground float 9b is set. It may be supported in a fixed state, and the pressure on the fulcrum arm due to the variation of the ground pressure may be detected.

[0013] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is a side view of a groove arranging unit.

FIG. 3 is a plan view of a groove arranging unit;

FIG. 4 is a control block diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 3 Seedling planting apparatus 4 Frame member 9b Ground float 17 Groove device 18 Control means 20 Ground adjuster CY Drive mechanism PM1 Ground pressure detecting means

Claims (1)

(57) [Claims] 1. A driving mechanism (C) for a traveling body (1).
Y) connects the seedling planting device (3) so that it can be driven up and down freely,
Contact pressure detecting means (P) for detecting the amount of change in the contact pressure on the mud surface applied to the contact float (9b) provided in the seedling plant (3).
M1), and control means (18) for controlling the drive mechanism (CY) based on the detection information from the ground pressure detection means (PM1). A groove is formed in a lateral portion of the ground float (9b). A rice transplanter configured to create a groove for supplying fertilizer on a mud surface with a container (17) and to plant seedlings, wherein the groove producing device (17) is connected to the seedling planting device (3). A rice transplanter having an earth- fixing tool (20) for mounting and fixing to a frame member (4) and for leveling a seedling-scheduled-scheduled portion, which is elastically retractable with respect to the frame member (4).