JP2002101714A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a seedling planting precision at a corner of a field. SOLUTION: In turning a traveling body at the side a levee, when an upper link 3a and lower links 3b and 3b are raised to an intermediate position B, the lower sides of the lower links 3b and 3b are brought into contact with the edge of a central soil preparation plate 28a rising from below. When the upper link 3a and the lower links 3b and 3b are further raised from the intermediate position B and moved to a highest rise position C and a seedling planting part 4 is raised, the edge of the central soil preparation plate 28a is pressed downward by the lower links 3b and 3b, a supporting arm 32 is retracted downward and rotated while compressing a spring attached to a supporting arm 32 and only the seedling planting part 4 is raised and moved to the highest rise position C. Consequently, the seedling planting part 4 equipped with the central soil preparation plate 28a and right and left soil preparation plates can be raised, lengths of the upper link 3a and the lower links 3b and 3b are shortened and the whole length of the machine body of a sulky rice transplanter is reduced to improve the longitudinal balance of the machine body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved seedling transplanter.

[0002]

2. Description of the Related Art In a conventional riding rice transplanter, a seedling planting portion is connected to a rear portion of a traveling vehicle body via a lifting link mechanism so as to be able to move up and down, and is planted by a float located in front of a seedling planting device in the seedling planting portion. This is a configuration in which the attachment surface is leveled and seedlings are planted by a seedling planting device.

[0003]

In the conventional apparatus, seedlings are planted by a seedling planting device on a planting surface that has been leveled with a float. There is a problem that the leveling work is not sufficient with only the float, and it is difficult to improve the planting accuracy of the seedlings because the mud moves a lot and the unevenness is large.

[0004] In order to solve this problem and improve the leveling of the headland, it can be solved by installing another leveling device outside the float. However, there is only a small space behind the rear wheels of the running vehicle in front of the float of the seedling planting section, and it is difficult to arrange the leveling device.In addition, the newly provided leveling device is installed in the seedling planting section and the lifting link mechanism. Raising without interference has been a more difficult problem. Therefore,
The present invention is intended to solve such a problem.

[0005]

According to a first aspect of the present invention, there is provided a seedling plant 4 connected to a rear portion of a traveling vehicle body 2 via a lifting link mechanism so as to be able to move up and down. A ground leveling device 28 supported by the seedling planting section 4 is provided in front of the seedling planting section 4 and behind the traveling vehicle body 2, and the seedling planting section 4 is raised to a non-planting position by the lifting link mechanism. When this is done, the leveling device 28 is lowered relative to the seedling planting section 4 so as not to hinder the upward movement of the lifting link mechanism.

[0006]

According to the present invention, the upper link 3a
When the seedling planting section 4 is located at the working position A by lowering the lower links 3b, 3b on the left and right sides, the float 27 and the center leveling plate 28a, and the left and right leveling plates 28b, 28c are leveled and ground. The seedlings are planted by the planting devices 25, 25,...

When the upper link 3a and the lower links 3b, 3b are raised to the intermediate position B when the traveling vehicle body 2 turns on the shore, when the lower surface of the lower links 3b, 3b rises from below, the central leveling plate 28a The ends of the abut. From this intermediate position B, the upper link 3a and the lower link 3b,
When the seedling planting section 4 is raised to the highest position C by raising 3b, the central ground plate 28a is formed by the lower links 3b and 3b.
Is pressed downward, and the support arm 32 is retracted and rotated downward while compressing the spring 33 attached to the support arm 32, and the center leveling plate 28a is lowered to the lower links 23b, 23b.
Is moved to the highest position C while holding.

As described above, the present invention provides the center leveling plate 28
a, while the left and right leveling plates 28b and 28c are provided on the front side of the seedling planting section 4 and on the rear side of the traveling vehicle body 2, the seedling planting section 4 is provided.
Can be raised to a higher position, and the lengths of the upper link 3a and the lower links 3b, 3b can be shortened, so that the overall length of the riding rice transplanter can be reduced to improve the longitudinal balance of the aircraft. In addition, the running performance and the work performance can be improved, and the planting posture of the seedlings can be stabilized.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. First, the overall configuration of the seedling transplanter 1 will be described with reference to FIGS. The seedling transplanter 1 is provided with, for example, a six-row planting planting section 4 at the rear of a riding traveling vehicle body 2 via a lifting link device 3 so as to be able to move up and down.
The whole is configured as a riding rice transplanter.

The traveling vehicle body 2 includes left and right front wheels 5 and 5 and left and right rear wheels 6 and 6. The front wheel final case 8, on the left and right sides of the mission case 7 arranged at the front of the fuselage,
The left and right front wheels 5, 5 are attached to front wheel shafts projecting laterally from the lower portions of the front wheel final cases 8, 8. Further, the front end of the main frame 9 is fixed to the rear part of the transmission case 7, and the rear wheel gear case 10, 10 can be freely rolled at the center of the rear end of the main frame 9 with the horizontal rear wheel rolling shaft as a fulcrum. The left and right rear wheels 6, 6 are mounted on a rear axle that supports and then projects laterally from the rear wheel gear cases 10, 10.

The engine 11 is mounted on the main frame 9,
The rotational power is taken out to an engine output shaft protruding from the left side of the engine 11, and the rotational power is transmitted to a drive shaft of a hydraulic pump (not shown) via a first belt transmission device 12, and further, continuously variable transmission is possible. The transmission is transmitted to the transmission case 7 via a second belt transmission 13.

The rotational power transmitted to the transmission case 7 is shifted by a main transmission (not shown) in the case, branched into running power and work machine power, and taken out, and the running power is passed through the front wheel final cases 8,8. To the left and right front wheels 5, 5 and to the left and right rear wheels 6, 6 via the rear wheel gear cases 10, 10. In addition, the working machine power is
Then, it is transmitted to the seedling planting section 4 via a work machine transmission shaft 15 which can be freely bent, and drives its operating section.

An upper portion of the engine 11 is covered with an engine cover 16.
A cockpit 17 is provided on the engine cover 16. A steering wheel 18 for steering the left and right front wheels 5 and 5 is provided in front of the cockpit 17, and a spare seedling mounting table 19 for mounting replenishing seedlings is provided on both front left and right sides of the traveling vehicle body 2.

The lifting link device 3 has a parallel link configuration, and
Book upper link 3a and left and right lower links 3b, 3b
It consists of. These links 3a, 3b, 3b
Is pivotally supported on a link front frame 20 erected at the rear end of the main frame 9 so that the links 3a, 3b, 3
The linked frame 21 is connected to the tip end of the link b. Then, the seedling planting part 4 is mounted on the frame 21 after linking in a freely rolling manner.

A hydraulic elevating cylinder 23 is interposed between the support member fixed to the main frame 9 and the tip of the swing arm 22 formed integrally with the upper link 3a. The link 3a is turned up and down, and the seedling planting part 4 connected to the linked frame 21 is moved up and down in a substantially constant posture. Hydraulic lifting cylinder 23
Is controlled by a hydraulic lift valve (not shown) provided on the traveling vehicle body 2.

The seedling planting section 4 is, for example, a six-row planting. The seedling mount 24 supplies seedlings one by one to a predetermined seedling outlet, and six sets of seedlings supplied to the seedling outlet in a field. , A seedling mounting stand 24 and a transmission frame 26 for supporting and transmitting power to the seedling planting devices 25, 25,..., A field prior to planting the seedlings. Central float 27a for leveling the surface, left and right float 27
b, 27c.

Next, the leveling device 28 of the seedling planting section 4 will be described with reference to FIGS. The leveling device 28 includes a central leveling plate 28a, and left and right leveling plates 28b and 28c detachably attached to left and right sides of the central leveling plate 28a.
It consists of. This center leveling plate 28a and the left
The right leveling plates 28b and 28c are arranged on the front side of the seedling planting part 4 and on the rear side of the traveling vehicle body 2, and are attached to the seedling planting part 4 side.

The center float 27a of the seedling planting section 4 is arranged ahead of the left and right floats 27b and 27c, the center leveling plate 28a is arranged close to the front of the center float 27a, and left and right. It is located inside the rear wheels 6, 6 and located below the rear of the lower links 3b, 3b. The left and right leveling plates 28b and 28c attached to the center float 27a are arranged rearwardly so that the left and right outer free ends are sequentially located rearward, and
They are located inside the left and right rear wheels 6,6.

When the left and right rear wheels 6, 6 and the left and right auxiliary wheels 29, 29 are mounted on the traveling body 2, the left and right auxiliary wheels are attached to the mounting positions of the left and right terrain plates 28b, 28c. The relationship is such that the wheels 29, 29 are located. Therefore, when the left and right auxiliary wheels 29, 29 are mounted, the left and right
b, 28c are removed, and only the center leveling plate 28a is attached to perform seedling planting work.

The rear ends of a pair of left and right support arms 32, 32 are pivotally supported on left and right brackets 30 attached to the transmission frame 26 of the seedling planting section 4 via pins 31, 31 so as to be vertically rotatable. Leveling device 2 at the front end of support arms 32
Eight center leveling plates 28a are attached. Springs 33, 33 are provided between the bracket 30 and the support arms 32, 32.
The support arms 32, 32 are supported in a state where no load is applied in the vertical direction in a state where the load is applied vertically, and when a predetermined load acts on the support arms 32, 32 from above, the support arms 32, 32 are retracted downward. It is configured to operate.

The transmission frame 26 has an L-shaped switching arm 3
4, 34 are supported by pins 31; This switching arm 3
One end of each of the springs 33 is in contact with the rear end of each of the springs 33, and the leveling depth switching lever 35 and the switching wires 36, 36
, The switching arms 34, 34 can be switched between a lower leveling position and an upper leveling position.

When the leveling depth switching lever 35 is operated to rotate the switching arms 34, 34 clockwise, the rear ends of the springs 33, 33 are pivoted downward by the switching arms 34, 34 to be supported. The front ends of the arms 32, 32 are rotated upward, and the center leveling plate 28a and the left and right leveling plates 28b, 28c
Moves to an upper off-road position. When the leveling depth switching lever 35 is operated to rotate the switching arms 34, 34 in a counterclockwise direction, the center leveling plate 28a and the left and right leveling plates 28
b, 28c move to the lower leveling position. When the switching arms 34, 34 are locked by the fixing means 37, the center leveling plate 28a and the left and right leveling plates 28b, 28c are fixed at the leveling position or the non-leveling position.

During normal seedling planting, the central leveling plate 28a and the left and right leveling plates 28b and 28c are switched to the upper non-leveling position, and the central leveling plate 28a is planted at the time of planting the headland.
When the right and left leveling plates 28b and 28c are switched to the lower leveling position, the headland with a rough ground surface is leveled and the seedling planting operation can be performed satisfactorily. The switching of the central terrain plate 28a and the left and right terrain plates 28b and 28c to the terrain position or the non-leveling position may be switched in conjunction with a planting depth adjustment lever (not shown) or the like.

In this embodiment, as shown in FIG. 5, a vertical cylindrical portion 38 at the front end of each of the support arms 32, 32 is provided.
And the support pin 39 on the side of the center leveling plate 28a is fitted and held,
For example, the lock device 40 can be adjusted up and down in five stages and fixed. Therefore, the center leveling plate 28a and the left and right leveling plates 28b, 28
The leveling angle of c can be adjusted up and down without changing the leveling angle, and stable leveling work can be performed.

Next, a description will be given of how the leveling device 28 moves upward when the seedling placement section 4 is raised. As shown by the solid line in FIG. 3, the upper link 3a and the left and right lower links 3
In the working position A where the b and 3b are pivoting downward, the float 27 and the leveling device 28 advance forward while leveling the ground surface while touching the ground, and move the mud generated by the left and right rear wheels 6 and 6 to the center. The leveling plate 28a and the left and right leveling plates 28b, 28c level the ground level, and then seedlings are planted by the seedling planting devices 25, 25,.

When the upper link 3a and the lower links 3b, 3b are raised to the intermediate position B when the traveling vehicle body 2 turns on the shore, the power transmission to the seedling planting section 4 is cut off and the seedlings are planted. The attachment part 4 moves up to the intermediate position B. Then, the end of the central ground plate 28a, which has risen from below, comes into contact with the lower surface of the lower link 3b, which has risen to the intermediate position B.

The upper link 3a and the lower links 3b, 3b are further raised from the intermediate position B and moved to the highest position C. If the seedling planting section 4 continues to rise during this time, the lower link 3b, 3b presses the end of the central leveling plate 28a downward, and the spring 3 attached to the support arm 32, 32
The support arms 32, 32 are retracted and rotated downward while compressing 3, 33, and only the seedling planting section 4 continues to ascend and moves to the highest position C.

Thus, while being a riding rice transplanter having the center leveling plate 28a and the left and right leveling plates 28b, 28c, the seedling planting section 4 can be raised to a high position, and the upper link 3a and the lower link 3a can be raised. By reducing the length of the links 3b, 3b, the overall length of the riding rice transplanter can be reduced, and the front-to-back balance of the aircraft can be improved. As a result, running performance, working performance, and seedling planting can be improved. The posture can be stabilized.

In this embodiment, as described above, the center leveling plate 28a and the left
The right leveling plates 28b and 28c are moved relatively downward to raise the seedling planting section 4 to the highest position.
In connection with the upward movement of the upper link 3a and the lower links 3b, 3b, the support arms 32, 32 are pivoted downward by an actuator such as a hydraulic cylinder or the like, and
8a and the left and right leveling plates 28b, 28c may be forcibly lowered to avoid interference with the lower links 3b, 3b.

Incidentally, as shown in FIG.
The recess 4 is provided at a position where the a
When the central grounding plate 28a is raised, the work implement transmission shaft 15 is fitted into the concave portion 41 when the central grounding plate 28a is raised, and the seedling attaching part 4 is raised without causing the central grounding plate 28a to interfere with the work equipment transmission shaft 15. Can be moved to the position.

In this embodiment, the center float 27
a is also used as a sensor float to detect the distance of the seedling planting section 4 from the ground surface and to control the raising and lowering of the seedling planting section 4.
8a, the left and right leveling plates 28b and 28c attached to the central leveling plate 28a are inclined rearward so as to be located rearward on both left and right sides in plan view, and approach the front left and right sides of the central float 27a. The leveling plate 28a and the left and right leveling plates 28b and 28c surround the front part of the central float 27a.

Accordingly, small unevenness can be leveled by the central leveling plate 28a to improve the sensing accuracy of the sensor float, and the mud raised by the left and right rear wheels 6, 6 can be leveled to the left and right. The ground planes 28b and 28c can lead to the wheel traces on the outside and level the ground cleanly.
The seedling planting accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a mobile agricultural machine.

FIG. 2 is an overall plan view of the mobile agricultural machine.

FIG. 3 is a cut-away side view of a main part.

FIG. 4 is a plan view of a main part.

FIG. 5 is a side view of a main part.

FIG. 6 is a plan view, a rear view, and a side view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seedling plant 2 Running vehicle body 3 Elevating link 3a Upper link 3b Lower link 4 Seedling mounting part 14 PTO shaft 15 Work implement transmission shaft 20 Link before frame 21 Link after frame 22 Swing arm 23 Hydraulic lifting cylinder 24 Seedling stand 25 Seedling Planting device 26 Transmission frame 27a Central float 27b Left float 27c Right float 28 Leveling device 28a Central leveling plate 28b Left leveling plate 28c Right leveling plate 29 Left and right auxiliary wheels 30 Bracket 31 Pin 32 Support arm 33 Spring

Claims (1)

[Claims] 1. A seedling planting section 4 is connected to a rear portion of a traveling vehicle body 2 via a lifting link mechanism so as to be movable up and down.
A ground leveling device 28 supported by the seedling planting section 4 is provided on the front side of the traveling vehicle body 2 at the front side of the vehicle, and when the seedling planting section 4 is raised to the non-planting position by the elevating link mechanism, the leveling is performed. A seedling transplanter characterized in that the device (28) is lowered relative to the seedling planting section (4) so as not to hinder the upward movement of the lifting link mechanism.