JPH05304810A - Seedling transplanter - Google Patents

Abstract

PURPOSE:To provide a seedling transplanter capable of stabilizing the force for supporting a machine body in lateral direction, minimizing the lifting of mud with adjacent wheels and optimizing the transplantation of seedlings. CONSTITUTION:The objective seedling transplanter has two rows of seedling transplantation positions (a),(a) placed at the back of each spacing L... of three or more wheels 7a, 7b, 7c, 7d parallelly arranged in the lateral direction of a machine body. The power for supporting the machine body in lateral direction can be stabilized, the lifting of mud with adjacent wheels 7a, 7b, 7c, 7d can be minimized to optimize the transplantation of seedlings and the machine body can be turned without severely damaging the butt.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting machine that improves running performance and enables good seedling planting work.

[0002]

2. Description of the Related Art As a conventional technique of this kind, Japanese Patent Laid-Open No. 53-
As shown in Japanese Patent No. 33815, there is a riding-type rice transplanter having four rear wheels in order to reduce a weight burden ratio in each wheel.

[0003]

However, in the above-mentioned conventional one, since the distance between the four rear wheels is only one row for seedling planting, the distance is so small that the adjacent rear wheels lift up the mud and the field. It often happens that seedlings cannot be planted properly due to disturbed surfaces. In particular, when the aircraft was turning, the muddy soil was often lifted and the headland was severely damaged.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention has a structure in which three or more wheels 7a, 7b, 7c, 7d are arranged side by side in the lateral direction of the machine body. This is a seedling planting machine with two rows of seedling planting positions ai in the rear.

[0005]

According to the present invention, the intervals L between the wheels 7a, 7b, 7c, 7d arranged in parallel in the left-right direction of the machine body are as follows:
Since there are two rows of seedling planting positions ai behind the, the lateral support force of the machine is stable, and the mud can be lifted by the adjacent wheels 7a, 7b, 7c, 7d. The number of seedlings can be properly planted, and there is no serious damage to the headland when the aircraft turns.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An eight-row planting type rice transplanter which is a kind of seedling planting machine according to an embodiment of the present invention shown in the drawings will be described below. Reference numeral 1 denotes a riding type vehicle body, and the machine body is configured by connecting a transmission case 2 arranged at the front part and a rear wheel transmission case 3 arranged at the rear part of the machine body by a frame 4. Left and right front axle cases 5, 5 are fixed to the left and right sides of the rear portion of the mission case 2, and left and right steering drive front wheels 6 are provided under the left and right front axle cases 5, 5.
・ 6 is provided.

The rear wheel transmission case 3 has a main case 3a fixed to the frame 4 and left and right cases 3b and 3 having bases fixed to both left and right sides of the main case 3a and extending rearward.
It is configured in a U shape in a plan view with b. 7a / 7b / 7
c and 7d are rear driving wheels of the same diameter, and left driving rear wheels 7a and
7b is mounted on both left and right sides of the left case 3b, and right drive rear wheels 7c and 7d are mounted on both left and right sides of the right case 3b.

Reference numeral 8 denotes an engine, and a rear wheel transmission case 3
Power is transmitted from the engine 8 to the mission case 2 at the front of the fuselage, and the left and right front axle cases 5 are transmitted from the mission case 2 via the front wheel differential mechanism.
Power is transmitted to the front and rear steering wheels 6 and 6 by the transmission shaft in 5 and further to the rear wheel diff mechanism 10 in the main case 3a of the rear wheel transmission case 3 via the transmission shaft 9 in the frame 4. Power is transmitted, and the left and right rear wheel drive shafts 11 from the rear wheel differential mechanism 10
11 and the transmission chain 12 in the left and right cases 3b and 3b
Power is transmitted to the left and right rear wheel differential mechanisms 13 and 13 via 12. Then, power is transmitted to the axles 14 and 14 from the left and right rear wheel differential mechanisms 13 and 13, respectively, and the rear wheels 7a and 7b.
7c and 7d are configured to be driven.

Reference numeral 10a denotes a diff lock device for the rear wheel diff mechanism 10, which is in a non-operating state in which the left and right rear wheel drive shafts 11 and 11 are differentially rotated and a diff lock action in which the left and right rear wheel drive shafts 11 and 11 are integrally rotated. It is configured so that it can be switched to the state. 13a and 13b are left and right rear wheel differential mechanisms 13 respectively.
.13 diff lock devices each having an axle 14,14
It is configured so that it can be switched between a non-acting state in which the vehicle is differentially rotated and a diff-locking state in which the axles 14 and 14 are integrally rotated.

The diff lock device 10a and the diff lock devices 13a and 13b are set in the diff lock state when the operation lever 29 is operated to the "on" position so that the diff lock state is set during the seedling planting work. Is connected to the operation lever 29. (In addition, the diff lock device 10a and the diff lock device are operated when the steering handle 19 is operated more than a predetermined amount to rotate the machine body, when the left and right brake pedals are operated by a brake, and when the seedling planting device 23 is lifted more than a predetermined amount. 13a and 13b may be connected so as to be in an inoperative state.) 15 and 15 are left and right side brakes provided on the left and right rear wheel drive shafts 11 and 11 in the main case 3a of the rear wheel transmission case 3. The left and right side brakes are each activated by the depression operation of each of the left and right brake pedals provided at the front of the step 16 provided in front of the engine 8. That is, the driving rear wheels 7a, 7b or 7c on the side where the left and right brake pedals are depressed
The drive of 7d is stopped and the brake is activated.

In the transmission case 2, a main transmission mechanism in which the rotational driving force of the engine 8 is changed by a main transmission lever 17 described later and a front wheel differential mechanism are built in. 1
Reference numeral 8 is a body cover molded by FRP, and an engine cover portion that covers the periphery of the engine 8 and steps 16 provided on the front and left and right sides of the engine 8 are integrally formed and fixed to the body. ing. And step 1
Reference numeral 6 extends from both left and right sides of the steering wheel 19 to the front to form a left and right passage A.

Reference numeral 20 denotes a control seat, which is a body cover 18
Is attached to the top of the. Reference numeral 21 is a link mechanism composed of an upper link and a lower link, the base end of which is pivotally attached to a support frame 22 which extends above the rear wheel transmission case 3, and the rear end of which is a seedling. Vertical frame 2 provided with a rolling shaft 24 for supporting the planting device 23 in a freely rolling manner.
It is pivotally attached to 5.

Reference numeral 26 is a hydraulic cylinder device in which the base of the cylinder is pivotally attached to the rear wheel transmission case 3 and the tip of the piston is pivotally attached to the upper link. Reference numeral 27 is a front cover formed of a synthetic resin that covers the periphery of the handle post, and is fixed to the front upper surface of step 16,
The upper surface thereof is an operation panel provided with various display devices and meters. The main transmission lever 17 is provided on the left side of the front cover 27, and the belt type continuously variable transmission provided on the transmission system between the engine 8 and the transmission case 2 is provided on the right side of the front cover 27. An auxiliary shift lever 28 for operating the mechanism and an operating lever 29 for operating the planting clutch and vertically operating the seedling planting device 23 are provided.

Reference numeral 30 is a main clutch pedal provided on the left side of the front cover 27. The seedling planting device 23 includes a planted transmission case 31, which also serves as a frame, which is mounted on the rolling shaft 24 of the vertical frame 25 so as to be capable of rolling, and a lower support member 32 and an upper support member 33 provided in the planted transmission case 31. The seedling mounting table 34 supported by and reciprocating in the left-right direction of the machine, and the seedling mounting case 34 mounted on the rear end of the planting transmission case 31 divides one seedling from the bottom of the seedling mounting table 34 to plant in the field. The seedling planting device 35, and the four ground leveling floats 37a, 37b, which are ground leveling bodies, the rear part of which is pivotally supported by a shaft 36 and the front part of which is vertically swingably mounted on the lower part of the planting transmission case 31. It is composed of 37c and 37d.

Each leveling float 37a, 37b, 37c,
The drive wheels 37a, 7b, 7c, 7d are arranged behind the drive rear wheels 7a, 7b, 7c, 7d, respectively.
Cultivated fields disturbed by the plant and planting seedlings 3
It is provided to level the front of the field where the seedlings are planted in 5. Reference numeral 38 denotes a hydraulic valve provided between the front upper surface of the inner leveling floats 37b and 37c and the planted transmission case 31. Both of the front portions of the leveling floats 37b and 37c are lifted by an external force beyond an appropriate range. At this time, the hydraulic pump mounted on the left side surface of the transmission case 2 sends the pressure oil pumped out from the inside of the transmission case 2 to the hydraulic cylinder 26 to cause the piston to project and the link mechanism 2
1 to raise the seedling planting device 23 to a predetermined position, and when the front parts of the leveling floats 37b and 37c both fall below the proper range, the pressure oil in the hydraulic cylinder 26 is returned to the mission case 2. The link mechanism 21 is moved downward to lower the seedling planting device 23 to a predetermined position, and when the front part of at least one of the leveling floats 37b and 37c is within a proper range (the seedling planting device 23 is located at a proper predetermined position). In order to prevent the pressure oil from entering and leaving the hydraulic cylinder 26, the seedling planting device 23 is held at a fixed position.

The operation lever 29 provided on the lower right side of the steering handle 19 so as to project from the right side of the front cover 27 is
The PTO clutch provided in the mission case 2 is operated so that the power to the seedling planting device 23 can be turned on and off, and the hydraulic valve 38 is operated to manually move the seedling planting device 23 up and down. It is configured to move. That is, when the operation lever 29 is set to the “fixed” position, P
The TO clutch is disengaged, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 38 is switched to a position where the pressure oil in the hydraulic cylinder 26 is stopped from entering and leaving to hold the seedling planting device 23 at a fixed position, and the seedling planting device 23 is raised. It does not descend. And
When the operation lever 29 is operated backward to the "down" position,
Although the PTO clutch is disengaged, the operation of the seedling planting device 23 is still stopped, but the hydraulic valve 38 is set to the leveling float 37b.3.
It becomes an automatic control state that can be switched by the vertical movement of 7c. Then, when the operation lever 29 is further moved to the “ON” position, P
The TO clutch is engaged, the seedling planting device 23 is driven, and the hydraulic valve 38 is in an automatic control state in which it is switched by the vertical movement of the leveling floats 37b and 37c. On the contrary, the operating lever 29
Is operated to the "up" position, the PTO clutch is disengaged, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 38
Are forcibly switched to the side of raising the seedling planting device 23, and the seedling planting device 23 is raised.

39 is each leveling float 37a, 37b, 3
A rake for leveling provided between 7c and 37d for leveling a field disturbed by the front and rear steering wheels 6 and 6 and leveling a field between each leveling float 37a, 37b, 37c and 37d. It is provided accordingly. Reference numeral 40 is a diff lock pedal of the front wheel diff mechanism in the transmission system of the left and right steering front driving wheels 6.

A indicates each seedling planting position by the eight seedling planting devices 35, and the seedling planting device 35 ... Is arranged so that two seedlings are planted between the rear wheels 7a, 7b, 7c and 7d. It is provided. The riding type rice transplanter configured as described above is put in the paddy field, the seedlings are placed on the seedling placing table 34, the engine 8 is started, and the main shift lever 17 is set to the "planting speed" position to set the sub shift lever 28. Is set to the “high” or “low” position and the operation lever 29 is set to the “on” position to drive each part to move the machine forward, and the seedling planting device 23 is automatically controlled to the proper position to perform the rice planting work. Be seen. At this time, since the operation lever 29 is in the "ON" position during the seedling planting work, the diff lock device 10a and the diff lock devices 13a and 13b are in the diff lock action state, and the rear wheel diff mechanism 10 and the left and right rear wheels. The differential mechanism 13, 13 does not rotate differentially, and the rear wheels 7a, 7b
・ Since 7c and 7d all rotate in the same direction, the aircraft has good straightness and can plant seedlings straight. In addition, the four rear wheels 7a, 7b, 7c, 7d are provided at wide intervals so that two seedlings can be planted, so that the airframe support performance is good, and the rear wheels 7a, 7b, 7b 7c
There is little risk of picking up mud between 7d, and very good running performance is achieved, and proper rice planting work can be performed.

When turning the aircraft at the edge,
When the operation lever 29 is set to the “up” position, the PTO clutch is disengaged, the operation of the seedling planting device 23 is stopped, and the hydraulic valve 38 is operated.
Are forcibly switched to the side that raises the seedling planting device 23, and the seedling planting device 23 is raised, and the diff lock devices 10a and the diff lock devices 13a and 13b become inactive, and the rear wheel diff mechanism 10 and the left and right rear wheel diff mechanism 13 are deactivated.・ 13 becomes differential rotation. Therefore, when the operator operates the control handle 19 to turn the body, the rear wheels 7a, 7b, 7c, 7
The d is appropriately rotated differentially, can make a small turn without disturbing the mud surface in the field, and does not damage the headland so much that headland planting work can be performed well. When the operator operates the steering handle 19 and simultaneously depresses the brake pedal on the turning side during this turning, a smaller turn can be made. (For example, when making a right turn, if the right side brake 15 is activated by depressing the right brake pedal, the rotation of the right rear wheel drive shaft 11 stops and is fixed, so that the right rear wheel diff mechanism 13 causes the two right side wheels to rotate. The rear wheels 7c and 7d reversely rotate with each other as the vehicle turns, and the machine body can make a one-point turn.) If the worker is a skilled worker, setting the auxiliary shift lever 28 to the "high" position will increase the speed. Work speed is improved and work efficiency is improved.

On the other hand, when traveling on the road, the operating lever 29
Is operated to the "fixed" position, the diff lock device 10a and the diff lock devices 13a and 13b are in a non-acting state, and the rear wheel diff mechanism 10 and the left and right rear wheel diff mechanism 13.1.
3 rotates differentially. Therefore, the rear wheels 7a, 7b, 7c, 7
Since d rotates differentially, it is possible to perform good road travel.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, the left and right cases 3b and 3b of the rear wheel transmission case 3 are formed by a chain case, and the left and right rear wheel differential mechanisms 13 and 13 are removed, and the wheel diameters are changed instead. That is, the diameter of the rear wheels 7a and 7d on the outside of the machine body is made smaller than the diameter of the rear wheels 7b and 7c on the inside of the machine body.

A hydraulic valve 38 is provided between the front surface of the leveling floats 37a, 37d located behind the rear wheels 7a, 7d having a small diameter and the planted transmission case 31, and the front of the leveling floats 37a, 37d is provided. When both parts are lifted by the external force beyond the proper range, the hydraulic pump mounted on the left side surface of the mission case 2 sends the pressure oil pumped out from the inside of the mission case 2 to the hydraulic cylinder 26 to cause the piston to project. The link mechanism 21 is moved upward to raise the seedling planting device 23 to a predetermined position, and the leveling float 3
When the front parts of 7a and 37d both fall below the proper range, the pressure oil in the hydraulic cylinder 26 is returned to the inside of the mission case 2, the link mechanism 21 is moved downward, and the seedling planting device 23 is lowered to a predetermined position. , Leveling float 37a
When at least one of the front portions of 37d is in the proper range
When the seedling planting device 23 is in a proper predetermined position, it is provided so that the pressure oil in the hydraulic cylinder 26 is stopped from entering and leaving to keep the seedling planting device 23 in a fixed position.

Further, the left and right steering drive front wheels 6 and 6 are positioned in front of the leveling floats 37b and 37c inside the machine body, and the left and right steering drive front wheels 6 and 6 are located at the leveling floats 37b and 37c.
・ The rake for leveling 3 is configured to level the 6 wheel marks.
9 ... is excluded. According to the second embodiment, a hydraulic valve 38 is provided between the planting transmission case 31 and the front upper surface of the leveling floats 37a, 37d located behind the rear wheels 7a, 7d that are small in diameter and do not damage the mud surface. Since the seedling planting device 23 is configured to be controlled to move up and down, the control can be properly performed and a good rice planting work can be performed.

Next, a third embodiment will be described with reference to FIG. In the third embodiment, as in the second embodiment, the left and right cases 3b, 3b of the rear wheel transmission case 3 are formed by a chain case, and the left and right rear wheel differential mechanisms 13, 13 are excluded, and instead the wheels are replaced. The diameters are different. That is, the rear wheel 7 inside the machine body
The diameters of b and 7c are made smaller than the diameters of the rear wheels 7a and 7d on the outside of the fuselage.

A hydraulic valve 38 is provided between the front surface of the leveling floats 37b, 37c located behind the rear wheels 7b, 7c having a small diameter and the planting transmission case 31, and the front of the leveling floats 37b, 37c is provided. Planting device 23 by vertical movement of part
Is configured to be controlled up and down. In addition, inside the rear wheels 7a and 7d having a large diameter, the inside rear wheels 7b and 7c having a small diameter are provided.
A leveling rake 39 'is provided on the rear side, and the leveling rake 39' is configured to level the left and right steering drive front wheels 6.6 and the inner rear wheels 7b, 7c. ..

Next, a fourth embodiment will be described with reference to FIG. In the fourth embodiment, the present invention is applied to a 10-row planting type rice transplanter, and the seedling planting device 23 has a 10-row planting structure, and the rear wheel 7a on the outside of the machine is used as in the second embodiment.
-The diameter of 7d is made smaller than the diameter of the rear wheels 7b and 7c on the inside of the machine body, and five leveling floats 37a, 37b, 37c, 37d and 37e for leveling the seedling planting positions for two rows are provided.

Further, leveling rakes 39 ... Are arranged behind the rear wheels 7a, 7b, 7c, 7d. Further, the front surface of the central leveling float 37c and the planted transmission case 3
1 is provided with a hydraulic valve 38, and the leveling float 37
The vertical movement of the front part of c controls the seedling planting device 23 up and down. Furthermore, the outermost leveling float 37a
A rolling control hydraulic valve is provided between the front upper surface of 37e and the planted transmission case 31, and the link mechanism 21 is provided.
A rolling operation hydraulic cylinder is provided between the vertical frame 25 and the planted transmission case 31, and the outermost leveling float 37 is provided.
The inclination of the seedling planting device 23 to the ground is detected by the vertical displacement of a · 37e, and the rolling control is performed.

In the above embodiment, the present invention is applied to a riding type rice transplanter equipped with a seedling planting device at the rear portion of the riding type traveling vehicle body, but the present invention can be applied to any other seedling planting machine. You may implement.

[Brief description of drawings]

[Fig. 1] Overall side view of the riding rice transplanter

FIG. 2 is a plan view of a main part of a riding rice transplanter.

FIG. 3 is a plan view of an essential part showing a second embodiment.

FIG. 4 is a plan view of an essential part showing a third embodiment.

FIG. 5 is a plan view of an essential part showing a fourth embodiment.

[Explanation of symbols]

1 riding type vehicle body 2 mission case 3 rear wheel transmission case 4 frame 5 front axle case 6 steering drive front wheel 7a ... drive rear wheel 8 engine 16 step 17 speed change lever (main speed change lever) 19 control handle 21 link mechanism 23 seedling planting Device 26 Hydraulic cylinder device 28 Auxiliary shift lever 29 Operation lever

Claims (1)

[Claims] 1. A two-row seedling planting position a, i is set behind each space L between wheels 7a, 7b, 7c, 7d arranged in parallel in the left-right direction of the machine body. Seedling planting machine.