JPH0956205A - Height-controlling mechanism for gauge wheel of transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the adjustment of the height of a gauge wheel according to the variation of levee height even during the transplantation of a seedling. SOLUTION: A transplanter main body provided with a pair of right and left gauge wheels 3, 3 is connected to the back of a mobile machine body through a connection part in vertically movable manner. The transplanter main body is provided with a planting part and a parallel link 5 for supporting the planting part in vertically movable manner. A seedling is planted on a levee by a seedling planting claw of the planting part. The gauge wheels 3, 3 are attached to the transplanter main body through a gauge wheel lifting means B. The variation of the height of the planting part relative to the transplanter main body is detected by a planting part height detecting means E connected to the gauge wheel lifting means B. The heights of the gauge wheels 3, 3 are varied by driving the gauge wheel lifting means B according to the result detected by the height detection means E for the planting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gauge wheel height adjusting mechanism in a transplanter.

[0002]

2. Description of the Related Art Conventionally, as a form of a transplanter, a transplanter main body having a pair of left and right gauge wheels for supporting the main body of the transplanter is movably connected to a rear portion of a vehicle body through parallel links to perform transplantation. By the seedling planting claw of the planting section arranged on the machine body,
There is one that makes it possible to continuously plant seedlings on the ridges.

The gauge wheel is constructed so that the height can be adjusted by replacing the pins, and the height of the gauge wheel can be adjusted according to the height of the ridges to adjust the height of the planting portion to an appropriate height. The seedlings are transplanted after adjusting to.

[0004]

However, normally, when transplanting to a high ridge or a flat ridge, the link angle of the parallel link becomes large and the range corresponding to the pitching of the ridge becomes narrow. Therefore, the gauge wheel as described above is used. In the transplanter in which the height of the plant is adjusted by replacing the pin, the planting part may not be able to follow the sudden change in the ridge height during the transplanting work.

Further, even if it could follow, there was a problem that the soil cover pressure would change due to the change in the vertical phase between the gauge wheel and the planting part.

An object of the present invention is to provide a gauge wheel height adjusting mechanism in a transplanter capable of solving the above problems.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a transplanter main body having a pair of left and right gauge wheels attached to a rear portion of a traveling vehicle body is vertically movable through a connecting portion. In the transplanter in which a planting part and a parallel link that supports the planting part so as to be able to move up and down are arranged, and a seedling plant can be planted on a ridge by the seedling planting claw of the planting part, the gauge A ring
It is attached to the transplanter main body through the gauge wheel elevating means, and a planting portion height detecting means for detecting a change in relative height between the transplanter body and the planting portion is provided. And a gauge wheel height adjusting mechanism in a transplanter characterized by changing the height of the gauge wheel by driving the gauge wheel elevating means based on the detection result of the planting part height detecting means. It is a thing.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a transplanter equipped with a gauge wheel height adjusting mechanism according to the present invention. In a transplanter Y, a transplanter main body A has a three-point link mechanism behind a tractor T which is a traveling vehicle body. It is connected so as to be able to move up and down through a connecting portion C consisting of. t is the rear wheel of the tractor T, C1 is the lower link, C2 is the top link, and P is the PTO shaft.

In the main body A of the transplanter, a pair of left and right transplantation units 2 and 2 to be a planting portion are provided on the main frame 1, and a deck D for an auxiliary worker is provided in front of the transplantation units 2 and 2. At the bottom of Deck D, a pair of left and right gauge wheels 3,
3 is installed. 14 is a spare seedling mount.

The auxiliary worker's deck D is equipped with a boarding step 13, an operating section 15 and the like at required locations, and an auxiliary seat is provided on the upper end of a guard pipe 17 standing upright from the front end of the main frame 1. 18 are provided. 28 is P
It is a TO cover.

The main frame 1 has a tool bar 10 horizontally mounted on the front part of the transplanter main body A, a connecting pipe (not shown) horizontally mounted behind the tool bar 10, and a U-shaped plan view connected to the connector pipe. The guard pipe 4 is provided. The guard pipe 4 is composed of right and left straight pipes 41 and a bent pipe 42 continuously provided at the rear ends thereof.

Left and right columns 11, 11 are erected at both ends of the tool bar 10, and a horizontal pipe 12 is horizontally installed between the upper ends of the left and right columns 11, 11, and a central portion of the horizontal pipe 12 is provided. The operation portion 15 is provided in the.

Further, between the both ends of the lateral pipe 12 between the left and right columns 11, 11 and the rear ends of the left and right straight pipes 41, 41 of the guard pipe 4, left and right inclined pipes 16, 16 are provided. There is.

As described above, the main frame 1 of the transplanter main body A includes the tool bar 10, the guard pipe 4, the left and right columns 11,1.
1. It has a simple structure consisting of left and right inclined pipes 16, 16, etc., but retains sufficient overall strength.

Two transplantation units 2 and 2 are provided on the left and right sides so that two-row planting can be performed. However, since the transplantation units 2 disposed on the left and right have the same structure, one transplantation unit 2 will be described. .

The transplant unit 2 includes a unit frame 20 suspended from the left and right struts 11 and 11 via an elevating mechanism 6 having a suspension portion 6a, and a seedling slidably provided back and forth along the unit frame 20. A planting section 22 mounted on a mounting table 21, a bracket 10a mounted on the tool bar 10 so as to be able to move up and down via a parallel link 5, a seedling take-out section 23 arranged above the planting section 22, and a unit frame. A compression wheel 24 provided on the lower front part of the 20 and a soil covering wheel 25 attached to the lower rear part of the same via a soil covering arm 25a. The seedling table 21 is provided with a vertical feed mechanism and a horizontal feed mechanism (not shown) to feed the seedling trays in the vertical and horizontal directions.

In FIG. 1, reference numeral 26 is a mission section for taking in power from the PTO shaft P and transmitting power to the vertical feed mechanism, horizontal feed mechanism, seedling take-out section 23 and planting section 22, 27 is a seedling. A tray recovery rail that sends the seedling tray that has fallen after collecting the plants to the front side of the operator's deck D, 22a is a planting claw of the planting section 22, 22b is a planting section drive mechanism, and 23a is a seedling removing section It is a nail for extracting seedlings.

In the transplanter Y having the above structure, the gist of the present invention is the structure of the height adjusting mechanism of the gauge wheel 3.

That is, as a height adjusting mechanism of the gauge wheel 3, the gauge wheel 3 is attached to the transplanter main body A via the gauge wheel elevating means B, and at the same time, the transplanter main body A and the transplantation section (transplantation unit 2, 2) A planting part height detecting means E for detecting a change in relative height with respect to the above is provided, and the detecting means E and the gauge wheel elevating means B are connected to each other, and the result of detection by the planting part height detecting means E is displayed. Based on this, the gauge wheel elevating means B is driven to change the height of the gauge wheel 3.

Here, the planting portion height detecting means E is composed of upper and lower limit switches 36, 37, and the respective switches 36, 37
Are arranged above and below the parallel link 5 with a certain distance.

The gauge wheels 3 and 3 are connected to the lower link C1 of the connecting portion C.
2, which are disposed below the left and right ends of the tool bar 10, and as shown in FIG. 2, the electric cylinders 30 as the gauge wheel lifting means B are attached to both ends of the tool bar 10, and the gauge is attached to the lower end of the cylinder 30. Wheels 3 and 3 are mounted so that they can roll freely.

The right and left gauge wheels 3, 3 are connected by a tie rod 31, and a gauge wheel steering device (not shown) is interlocked with the tie rod 31 so that the gauge wheels 3, 3 can be steerably rotated. . 32 is a pitman arm.

The electric cylinder 30 includes cylinder portions 33, 33 hung vertically on the tool bar 10, and a supporting cylinder 34, which is rotatably inserted around the coaxial line with the axis line oriented vertically in the cylinder portion 33. 34, the support cylinders 34, 34, the upper half of which is spline-fitted in such a way that it can slide up and down, and the gauge wheels 3, 3 are attached to the lower ends of the slide bodies 35, 35, and the slide bodies 35, 35. 35 is composed of an electric motor M for vertically expanding and contracting.

Further, the above-mentioned upper limit switch 36 and lower limit switch 37 are provided so that the upper link 5a constituting the parallel link 5 can detect the position where the upper link 5a is swung by 20 ° in the vertical direction. Reference numeral 5b is a lower link forming the parallel link 5.

The upper and lower limit switches 36, 37 have their base ends connected to the upper part of the electric cylinder 30 and extend in a bifurcated manner so as to extend from above and below so as to hold the rotation fulcrum of the upper link 5a from above and below.
Attached to the tip of 8,38, both limit switches 36,37
And the electric cylinder 30 are electrically connected and interlocked.

Therefore, the transplanter main body A and the transplant unit
The link angle of the parallel link 5 can be corrected by expanding and contracting the sliding bodies 35, 35 of the electric cylinder 30 according to the change in relative height with respect to 2, 2.

Normally, at the time of transplantation to a high ridge or a flat ridge, the link angle of the parallel link 5 becomes large, and if this link angle remains large, the range corresponding to the pitching of the ridge G becomes narrow. By doing so, the height of the gauge wheel 3 can be adjusted, and the range corresponding to the pitching of the ridges G can always be widened.

That is, when the height of the ridge G is changed during the transplanting work and the link angle of the parallel link 5 is swung upward by 20 °, the upper limit switch 36 detects this, and according to the detection result. When the electric cylinder 30 extends to increase the height of the gauge wheel 3, and conversely the link angle of the parallel link 5 swings downward by 20 °, the lower limit switch 37 detects this and contracts the electric cylinder 30. By lowering the height of the gauge wheel 3 and correcting the link angle of the parallel link 5, the range corresponding to the pitching of the ridge G can be widened.

Moreover, since the height of the gauge wheels 3, 3 can be automatically adjusted according to the height of the ridge G, the transplanting work can be efficiently performed.

Further, since the link angle of the parallel link 5 is kept within 20 °, the spring load of the suspension portion 6a of the elevating mechanism 6 for suspending the unit frame 20 is stable, and the earth cover pressure load is also constant. Has the effect.

The other structure of the transplanter Y will now be described. In FIG. 1, reference numeral 19 is an empty tray storage basket, which is an assistant seat 18 arranged at the frontmost part of the main body A of the transplanter.
It is installed on both left and right sides of.

The empty tray storage baskets 19 and 19 are fixed to the guard pipe 17 standing from the front end of the main frame 1 with bolts.

As described above, since the empty tray storage baskets 19 and 19 are provided on the right and left lateral sides of the assistant sheet 18, the operator picks up the seedlings, and the empty seedling trays are placed on the tray collecting rail 27. When it is dropped and sent to the side of the auxiliary worker's deck D, the auxiliary worker can store the empty tray in the empty tray storage baskets 19 and 19 while sitting on the auxiliary worker sheet 18.

In addition, the empty tray storage baskets 19 and 19 are tractors T.
Since it is located at the upper rear part of the rear wheel t, it is possible to guard an auxiliary worker who works near the rear wheel t and ensure safety.

[0036]

According to the present invention, a transplanter main body having a pair of left and right gauge wheels attached thereto is movably connected to the rear portion of a traveling vehicle body through a connecting portion, and the transplanter main body is planted with Part and a parallel link for supporting the planting part so that the planting part can be moved up and down, and in the transplanting machine capable of planting the seedlings on the ridges by the seedling planting claws of the planting part, the gauge wheel is Attached to the main body of the transplanter via the gauge wheel lifting means, and provided with a planting portion height detecting means for detecting a change in relative height between the transplanter body and the planting portion. Since the gauge wheel elevating means is driven based on the detection result of the planting part height detecting means to change the height of the gauge wheel, the following effects can be obtained.

Normally, at the time of transplantation to high ridges or flat ridges, the link angle of the parallel link becomes large, and if this link angle remains large, the range corresponding to the pitching of the ridges becomes narrow. The height of the wheel can be adjusted, and the range corresponding to the pitching of the ridges can always be widened.

Since the height of the gauge wheel can be automatically adjusted according to the height of the ridges, the transplanting work can be performed efficiently.

Since the link angle of the parallel link is kept within a certain range, the spring load of the suspension portion of the lifting mechanism for suspending the unit frame is stabilized and the earth pressure load is also constant.

[Brief description of drawings]

FIG. 1 is a side view of a transplanter including a gauge wheel height adjusting mechanism according to the present invention.

FIG. 2 is an explanatory diagram of a main part of the transplanter.

[Explanation of symbols]

 A Transplanter main body B Gauge wheel elevating means C Connecting section E Planting section height detecting means G Ridge Y Transplanting machine 2 Transplanting unit 3 Gauge wheel 5 Parallel link 23a Claw with seedling 30 Electric cylinder 36 Upper limit switch 37 Lower limit switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihiko Muneyoshi 1-32 Chayamachi, Kita-ku, Osaka-shi, Osaka Yanma Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A pair of left and right gauge wheels at the rear of the vehicle body.
The transplanter body (A) to which (3) and (3) are attached is vertically connected via the connecting part (C), and the transplanter body (A) also has a planting part and A parallel link (5) for supporting the part to move up and down is provided, and a transplanter capable of planting a seedling on the ridge (G) by the seedling planting claw (23a) of the planting part, Attach the gauge wheels (3), (3) to the transplanter body (A) through the gauge wheel lifting means (B), and
(A) A planting part height detecting means (E) for detecting a change in the relative height between the planting part and the planting part is provided, and the detecting means (E) and the gauge wheel lifting means (B) are connected to each other, The gauge in the transplanter characterized by changing the height of the gauge wheels (3), (3) by driving the gauge wheel lifting means (B) based on the detection result of the attached part height detecting means (E). Wheel height adjustment mechanism.