JPS641083B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a parallel four-link mechanism for driving the planting device up and down with respect to the machine while keeping the ground attitude constant or almost constant, and a parallel four-link mechanism is provided on the planting device side. This rice transplanter relates to a rice transplanter that can be freely switched between a working position protruding laterally outward and a non-working position retracted into the body side, and is equipped with a pair of left and right line-drawing markers that are urged to protrude in the working position.

When a rice transplanter equipped with line-drawing markers performs reciprocating planting travel, the left and right line-drawing markers are used alternately for each stroke to form a reference line on the rice field for the next adjacent stroke. ,
When making a U-turn at the edge of a ridge after finishing one stroke of planting, it is necessary to switch the line-drawing marker that was projected in the working position in the previous process to a non-working position. The switch was done manually.

However, when turning the aircraft at the edge of a ridge, it is necessary to skillfully raise the planting device and maneuver the aircraft, and in addition to this, it becomes extremely troublesome to switch the delineation marker to the non-operating attitude. Therefore, in recent years,
As shown in Publication No. 35218, the base end of the line-drawing marker is placed facing the ascending path of the lower link of the parallel quadruple link mechanism, and the line-drawing marker is brought into contact with the line-drawing marker as the lower link rises. configured to automatically switch to a non-working position,
Or, as shown in Utility Model Application Publication No. 54-23815,
A line drawing marker and a lever on the machine side are connected via a wire, and a lift arm for driving the planting device up and down is connected to the marker manual operation lever via a wire. The drawing marker is configured to be stored via an operating lever.

However, with the former method, that is, a means that switches the line marker to a non-working position by contact with the lower link, there are restrictions on the width of the lower link, the mounting position of the line marker with respect to the planting device, etc. In the case of a multi-row rice transplanter, the planting device side of the lower link, that is, the free end side of the lower link, must be bulged outward to the side of the machine to form a specially shaped lower link. Generally, the width of the machine is approximately the same as the width of the machine, and the line marker is generally attached near the outer side of the planting device.
In the case of a multi-row rice transplanter, the distance between the lower link and the line-drawing marker in the width direction is wide, so if you try to bring the lower link into contact with the base end of the line-drawing marker, the looseness of the lower link will increase. The end side must be formed into a specially shaped lower link that bulges outward from the side of the aircraft, and in such a case, because the width of the planting device is large, it is subject to the Road Traffic Law regulations. When driving on the road with the planting device removed, there is an inconvenience that the lower link, which protrudes largely in the width direction of the machine body, must also be removed. In addition, by using the latter method, in other words, by connecting the lift arm for lifting and lowering the parallel four-link mechanism to the manual lever for operating the line drawing marker via a wire, the lift arm for the machine can be moved as the parallel four-link mechanism rises. According to the means for storing the line drawing marker with a displacement amount, the wire connecting the lift arm on the machine side and the line drawing marker is long,
There is an inconvenience that the line drawing marker cannot be reliably switched to the non-working position due to the elongation of the wire.

Although the present invention has a structure in which a drawing marker is operated via a wire, it is intended to reduce the elongation of the wire so that the drawing marker can be smoothly switched to a non-operating position.

The characteristic structure of the present invention for achieving the above object is as follows:
Between the top link of the parallel quadruple link mechanism and the pair of left and right line markers, in conjunction with the rise above the planting work range of the planting device,
The present invention is characterized in that a cord-like body is provided to automatically switch the line-drawing marker in the working position to the non-working position against the biasing force, and this configuration provides the following effects.

In other words, when the parallel quadruple link mechanism for driving the planting device up and down rises, a relative distance change occurs in the vertical direction between the rear end of the top link of the parallel quadruple link mechanism and the planting device, and even with this displacement, the The line marker is switched to a non-active position via the body.

In this way, the line-drawing marker was attached to the lateral outer side of the planting device because it was a wire type that switched the line-drawing marker to the non-working position via the cord as the parallel quadruple link mechanism for driving the planting device lifted and lowered. Even in the case of a multi-row rice transplanter, it can be switched to a non-working position via the cords,
Unlike the contact type with the lower link, there is no need for the free end side of the lower link to have a special shape that bulges outward from the side of the body, and there is no need to remove the lower link when driving on the road. Since the line drawing marker is switched to the non-operating position based on the amount of displacement between the rear end of the top link and the planting device as the parallel quadruple link mechanism moves up and down, the amount of displacement of the lift arm relative to the machine can be adjusted. Unlike when switching the line drawing marker to a non-working position, there is no need to extend the cord connected to the line marker all the way to the machine on the proximal end of the parallel quadruple link mechanism, suppressing the elongation of the cord. This makes it possible to reliably switch the line drawing marker to the non-working position.

Embodiments of the present invention will be described below based on the drawings.

The riding rice transplanter for 5-row planting shown in Figure 1 is
a parallel four-link mechanism 3 for driving the planting device 2 up and down while maintaining a constant or almost constant ground posture ; The rolling center for allowing left-right relative rocking is the center of the body width, and the grounding float 17 of the planting device 2
The planting device 2 is equipped with a hanging link mechanism 4 that is suspended in the vicinity of the ground contact surface of the machine and has an inverted trapezoidal shape when viewed from the front. It is equipped with a pair of left and right line drawing markers 5 that can be freely switched between a non-working position and a stored position.

The machine 1 is constructed as follows.

That is, a transmission case 8 is connected to a frame 7 on which an engine 6 is mounted, a pair of left and right steering wheels 9 are mounted on the front part of the transmission case 8, and a pair of steering wheels 9 are mounted on the rear part of the transmission case 8. teeth,
A wheel support case 11 containing a transmission mechanism for a pair of left and right non-steered wheels 10 is fixed, and a steering handle 12 for the steered wheels 9 and a driver's seat are provided in the upper part between the front and rear wheels 9 and 10. 13 are arranged.

The planting device 2 includes a forward-leaning seedling stand 14 that can reciprocate in left and right directions, a planting claw 15, and a planting case 16 in which a drive mechanism for these is housed.
Also, a grounding float 17 for leveling the planting surface.
It is composed of etc.

The parallel quadruple link mechanism 3 is constructed as follows.

That is, as shown in FIG. 2, one top link 19 and the front ends of a pair of left and right lower links 20, 20 are pivotally connected to the fixed frame 18 on the side of the machine 1 , and both links 19 and 20 are connected to each other. . A hydraulic cylinder 2 is connected between the transmission case 8 and an arm 25 which is pivotally connected via a support shaft 24 and is fixed in the middle of the top link 19.
6 is interposed between the top link 19 and the lower link 2 as the hydraulic cylinder 26 expands and contracts.
The planting device 2 is configured to be driven up and down by vertical swinging of 0.0 and 20 degrees while maintaining a constant or almost constant ground posture with respect to the plant 1 .

As shown in FIG. 3, the hanging link mechanism 4 extends between both ends of the horizontal frame portion of the gate-shaped member 21 and the planting case 16 of the planting device 2 .
A pair of left and right links 4A, 4A are pivotally connected such that their extension lines intersect at the center of the width of the central grounding float 17 and near the grounding surface.

As shown in FIGS. 2 to 4, left and right pipe frames 2 project outward from the planting case 16 through the lower side of the seedling stand 14.
8, the pair of left and right line-drawing markers 5
A spring 29 is provided to swing freely around the axis in the longitudinal direction of the fuselage, and a spring 29 is provided to bias both line drawing markers 5 to protrude into the above-mentioned operating position.The rear end portion 19A of the top link 19 is As the linkage mechanism 3 moves up and down, the planting case 16
Extends rearward from the rear end pivot connection part so that the vertical relative distance between the protruding rear end portion 19A and the line drawing marker 5 varies,
The pair of left and right wires 30 that automatically and reversibly switch the line drawing marker 5 to a non-working position against the biasing force in conjunction with the rise of the planting device 2 above the planting work range are connected to the hanging link mechanism. The guide rollers 31, 31 are stretched through guide rollers 31, 31 which are pivotally connected to the lower ends of a pair of left and right trapezoidal links 4A, 4A constituting the link 4.

Further, a first pin 32 fixed to the line drawing marker 5 is fitted onto the pipe frame 28 from above to direct the line drawing marker 5 laterally outwardly and upwardly.
An arm 33 formed with locking grooves 33a and 33b for fixing and holding in a non-working position and a second position substantially along a vertical plane is pivotally mounted so as to be vertically swingable, and this arm 33 is attached in the engagement direction. A spring 34 is provided to urge the arm 33, and the arm 33 is
A rod-shaped manual operating tool 35 is provided which is disengaged against the biasing force of 4, thereby forming a mechanism 36 for manually switching the line drawing marker 5 from a non-operating position to an active position.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

The drawings show an embodiment of the drawing marker according to the present invention, and FIG. 1 is an overall side view, FIGS. 2 and 3 are enlarged side views and rear views of essential parts, respectively, and FIG. 4 is a switching state of the drawing marker. FIG. 1 ... This machine, 2 ... Planting device, 3 ... Parallel quadruple link mechanism, 5... Line drawing marker, 19...
Top link, 30... cable body, 36... switching mechanism.

Claims (1)

[Claims] 1. A parallel four-link mechanism 3 is provided for driving the planting device 2 up and down with respect to the machine 1 while keeping the ground attitude constant or almost constant. In a rice transplanter which can be freely switched between a working position protruding laterally outward and a non-working position stored on the body side, and is equipped with a pair of left and right line-drawing markers 5, 5 which are urged to protrude in the working position. , the top link 1 of the parallel quadruple link mechanism 3
9 and the pair of left and right line-drawing markers 5, 5, in conjunction with the raising of the planting device 2 above the planting work range, the line-drawing marker 5 in the working position is turned into a non-working position against the biasing force. A rice transplanter with a line-drawing marker, characterized in that cord-like bodies 30, 30 that automatically switch are stretched. 2. The automatic switching of the line drawing marker 5 to the non-working position is irreversible, and a mechanism 36 is provided for manually switching the line drawing marker 5 from the non-working position to the working position. A rice transplanter with a line marker as described in section.