JPH11332337A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rice transplanter effective for preventing the smearing of a float with mud in the case of deep field work or floating turn and keeping good ground leveling work and lift control by providing a specific splash board. SOLUTION: A rice transplanter provided with a float 30 having front part vertically movable relative to the machine body is provided with a splash board 70 to prevent the smearing of the float 30 with mud by closely contacting with the upper face of the front part of the float when the float 30 is lifted to the uppermost position. A transmission shaft for transmitting power to each part of the planting part is held in a frame pipe of the planting part placed parallel to the wheel axis of the driving wheel 6. The center of the pipe is preferably shifted opposite to the axis of the wheel 6 relative to the transmission shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement and a support structure of a spare seedling mounting table in a walking type seedling transplanter.

[0002]

2. Description of the Related Art A walk-type rice transplanter is provided with a float which serves both as a mud surface leveling means and a mud surface irregularity sensing means. The float is mounted so that the front part can be moved up and down. When the front part of the float moves up, the hydraulic lifting device operates to raise the machine, and when the front part of the float moves down, the machine lowers. As described above, the planting depth of the seedlings is maintained at a constant level by automatically raising and lowering the body according to the unevenness of the mud surface.

[0003] In a walking type rice transplanter equipped with this type of hydraulic lifting device, turning in a state where the float is in contact with the ground, that is, a so-called floating turn, may be performed. By lowering the fuselage forward and intentionally pressing the front of the float against the mud surface, the hydraulic lifting device is operated to raise the fuselage as needed.

[0004]

When the front part of the float is pressed against the mud surface as described above, the front part of the float is sunk into the mud compared to the normal state, so that the mud is placed on the float. Riding, it is easy to cause deterioration of terrain and false perception. The present invention aims to avoid such inconveniences,
For this purpose, the following configuration was adopted.

[0005]

That is, a seedling transplanter according to the present invention is a rice transplanter provided with a float whose front portion is vertically movable with respect to the body of the rice transplanter when the float is raised to the uppermost position. And a mudguard member which is in close contact with the front upper surface of the float to prevent mud from getting on the float.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. The seedling transplanter shown in FIGS.
The rice transplanter 1 is a row-planting type rice transplanter in which an engine unit including an engine 2, a transmission case 3, and the like is disposed at a front portion of the body. The upper part of the engine section is covered with a hood 4. The bases of the traveling chain cases 5, 5 are rotatably fitted to the cylindrical portions 3a, 3a projecting laterally from the side surfaces of the transmission case 3, and the paddy wheels 6, 6 are fitted to the rear end of the traveling chain case. Is supported. The front end of the main frame 7 is fixedly connected to the rear surface of the transmission case 3, and the rear end of the main frame 7 has a planting unit which also serves as a transmission case for transmitting to the planting devices 9,. Frame 1
2 are provided integrally. Furthermore, planting section frame 1
A rear frame 14, which is curved upward at the middle and has a rear end extending obliquely upward, is fixedly connected to the rear surface of the second member. At the rear end of the rear frame 14, a steering handle 15 and various levers are provided.

A hydraulic pump 17 is provided on the left side of the transmission case 3, and a hydraulic valve unit 18 is provided on the upper side. An elevating hydraulic cylinder 20 is provided rearward from the back of the hydraulic valve unit 18,
At the tip of the piston rod of the lifting hydraulic cylinder 20,
Link plate 2 urged backward by spring 21
2 are mounted horizontally horizontally. The left and right ends of the link plate 22 are connected to the upper ends of the swing arms 24, 24 projecting upward from the bases of the traveling chain cases 5, 5, respectively.
L, 25R. Left connecting rod 25
L is constituted by a rolling hydraulic cylinder 26.

The lifting / lowering hydraulic cylinder 20 constitutes a hydraulic lifting / lowering device. When the hydraulic cylinder 20 is extended and retracted, the left and right swing arms 24 and 24 rotate back and forth by the same angle, and the left and right wheels 6 and 6 are simultaneously driven. The aircraft moves up and down by moving up and down by an amount. Further, when the length of the left connecting rod 25L is changed by expanding and contracting the rolling hydraulic cylinder 26, the left swing arm 24 is rotated, and only the left wheel 6 is moved up and down with respect to the body. Left-right inclination is changed.

The planting section frame 12 includes a gear box 12a located at the center in the left and right directions, four planting chain cases 12b,... It is composed of connecting pipes 12c, 12c for connecting individual planting chain cases. Power is transmitted from the transmission case 3 to the input portion of the gear box 12a via the planted transmission shaft 28. The power is transmitted by the gear box 12a and the planted chain case 12
are transmitted to the planting chain cases 12b,... by the lateral planting portion transmission shaft 29 housed through the upper portions of the b and the connecting pipes 12c, 12c.

As shown in FIG. 5, the connecting pipes 12c, 1
The axis of 2c is shifted to the opposite side (rear) to the axles of the wheels 6, 6 with respect to the planting portion transmission shaft. Accordingly, the wheels 6, 6 can be located rearward or the wheels 6, 6 having a large outer diameter can be used without changing the diameter of the connecting pipes 12c and the position of the planting portion transmission shaft 29. Conventional walking type rice transplanters connect the wheels 6, 6 to the connecting pipes 12c, 12c.
Although it was provided close to the point where it interfered with c, there was a tendency that shifting it back a little further would improve the weight balance between the front and rear. With the above configuration, the wheels 6,
6 can be further positioned individually, and the weight balance can be improved.

The planting devices 9,... Are provided at the lower ends of the planting chains 12b,... Of the planting section frame 12, respectively. When passing through the seedling 46, a seedling of one strain is divided and taken out from the seedling mounting table 10 and planted in a field.

The seedling mounting table 10 is provided on the front side of the rear frame 14 so as to be inclined forward and downward, and reciprocates right and left with the seedlings placed thereon. Thereby, the seedlings at the bottom are supplied to the seedling outlets 10a,. When all the seedlings at the bottom are supplied, the belt-type seedling feeding device 10b,
Is activated and the seedlings on the table are sent downward by one stage.

Below the fuselage, a center float 30 for leveling and a pair of left and right side floats 31, 31 are provided. These floats are supported at the front end of a float support arm 32 by a pivot shaft 33, and the front part moves up and down in accordance with unevenness of the topsoil surface. Each float is suspended from the transmission case 3 by suspension links 34,... So that the front part does not fall below a certain angle. The float support arm 32
Is attached integrally to a float support pipe 36 rotatably supported by the rear frame 14, and the floats 30, 31, 31 are rotated by rotating the float support pipe 36 by a planting depth adjusting lever 37. The support height is changed, thereby adjusting the planting depth of the seedlings. When the aircraft is advanced while the floats are in contact with the ground, the center float 30 levels the seedlings at the two central rows, and the side floats 31, 31 level the seedlings at the left and right ends.

FIG. 6 is a diagram of a hydraulic control mechanism. The hydraulic valve unit 18 is supplied with a lifting control valve 40 for controlling the lifting hydraulic cylinder 20, a rolling control valve 41 for controlling the rolling hydraulic cylinder 26, and a hydraulic pump 17. A flow dividing valve 42 and the like for distributing incoming oil to the control valves 40 and 41 and supplying the oil are provided.

FIG. 7 shows a switching mechanism of the lift control valve 40. The elevating control valve 40 is a rotary valve, and when the valve shaft 50 is rotated in the U direction, the body is raised, and when the valve shaft 50 is rotated in the D direction, the body is lowered. The valve shaft 50 is a square shaft portion 5 on the base side.
0a and a round shaft portion 50b on the tip side, and a square shaft portion 50a
A first hydraulic arm 52 and a second hydraulic arm 53 are rotatably mounted on the round shaft portion 50b, respectively.

The arc-shaped long hole 5 of the operation plate 51
5 is connected to the planting / elevating lever L <b> 1 via the first hydraulic wire 57. The first hydraulic arm 52 is connected to an upper end of a vertical movement detection rod 58 attached to the center float 30. The vertical movement detection rod 58 is provided with a spring 59 interposed therebetween so that the vertical movement of the front part of the center float 30 is elastically controlled by the first hydraulic arm 5.
2 Also, the second hydraulic arm 5
Reference numeral 3 is connected to the side clutch levers L2 and L2 via the second hydraulic wire 60. The operating plate 51 is formed with an engaging portion 61 that is bent in the direction of the distal end of the valve shaft 50, and the engaging portion 61 is provided with first and second hydraulic arms 52 and 53.
Can be engaged. In the figure, 63 is a return spring of the operation plate 51, 64 is a return spring of the first hydraulic arm 52, 65 is a return spring of the second hydraulic arm 53, and 66 is a return spring of the hook 56.

When the planting / elevating lever L1 is at the "planting position", the hook 56 is at one of the positions shown in FIGS. 8 (a), 8 (b) and 8 (c), and the center float 30 is turned up and down. Automatic lifting control based on That is, when the center float 30 is at a predetermined angle, the hook 56 is
5A, the rotation of the operation plate 51 in the direction D is restricted by the first hydraulic arm 52.
The lift control valve 40 is in the neutral position (a). When the center float 30 moves down, the first hydraulic arm 52 rotates counterclockwise to release the restraint of the operation plate 51, and the operation plate 51 is rotated by the return spring 63 in the direction D. Then, the aircraft descends (b). When the center float 30 moves upward, the first hydraulic arm 52 rotates clockwise, and is pressed by the first hydraulic arm 52, thereby rotating the operation plate 51 in the U direction, and the body is raised (c). in this way,
The planting depth of the seedlings is maintained constant by raising and lowering the body based on the vertical rotation of the center float 30 due to the height of the field topsoil surface.

When the planting / elevating lever L1 is operated to the "up position", the hook 56 is engaged with the B end of the long hole 55a, and the operation plate 51 is largely rotated in the U direction. Rise (d).

When the planting / elevating lever L1 is operated to the "fixed position", the hook 56 stops at the end B of the elongated hole 55a, and the elevating control valve 40 is maintained at the neutral position. It is fixed (e).

When either the left or right side clutch lever L2 is operated in a state where the planting / elevating lever L1 is at the "planting position", the second hydraulic wire 60 is pulled, and the second hydraulic arm 53 moves the operation plate 51. The body is slightly raised by rotating in the U direction and fixed at that height (f).
The fixed height is such that the tip of the center float 30 contacts the topsoil surface. Since the body is raised in conjunction with the operation of the side clutch lever L2 when the body is turned in a field, it is not necessary to raise the body too much. Can be. In some cases, the configuration may be such that the body is raised to the uppermost position in conjunction with the operation of the side clutch lever L2.

The rolling control valve 41 is switched in conjunction with the rotation of the pendulum sensor 68 for detecting the lateral inclination of the machine. The rolling control valve 41 is switched according to the horizontal inclination of the machine detected by the pendulum sensor 68, and corrects the horizontal inclination of the machine. As a result, the machine body is always kept horizontally horizontally, and the planting depth of each planting device 9,... Is kept the same.

A stay pipe 70 for mounting a weight and a stand is provided at the front of the body. The stay pipe 70 has a loop shape and a rear end portion thereof is fixed to the transmission case 3. Rear part 70 of stay pipe 70
Reference numerals a and 70a have substantially the same inclination as the upper surface of the front part of the center float 30, and function as a mudguard member.

At the time of turning, when the side clutch lever L2 is turned off and the handle 15 is lifted to lower the body forward, the front part of the center float 30 is pressed against the mud surface and the body rises. The turning can be performed in a state where the is grounded. Also, when working in a muddy field, as shown in FIG.
When the weight 71 is attached to the front of the body so that the front side of the body becomes heavy, the front part of the center float 30 is pressed against the mud surface, and the body is constantly raised.

When the body is lifted as described above, the center float 30 is sunk into the mud more than in the normal state. At this time, the left and right ends of the front upper surface of the center float 30 and the rear part of the stay pipe 70 70a, 70a are in close contact, restricting further rise of the center float 30 and preventing mud from climbing over the float.

Further, at the time of storage, as shown in FIG. 3, the stand 72 is attached to the stay pipe 70, and the body is placed in an upright posture, so that it can be stored in a narrow space. Also at this time, the left and right ends of the upper surface of the front part of the center float 30 and the rear parts 70a, 70
By keeping a close, the position of the float can be stabilized.

[0026]

As described above, in the seedling transplanter according to the present invention, the mudguard member for preventing mud from getting on the float when the float is raised to the uppermost position also serves as the stand mounting member. For example, when performing a Fukada work or a floating turn, mud does not get on the float, so that it is possible to maintain good terrainability and elevation control.

[Brief description of the drawings]

FIG. 1 is a side view showing an operation state of a rice transplanter in a general paddy field.

FIG. 2 is a side view showing a working state of the rice transplanter in Fukada.

FIG. 3 is a side view illustrating a stored state of the rice transplanter.

FIG. 4 is a plan view of the rice transplanter.

FIG. 5A is a plan view of a planting frame and wheels, and FIG. 5B is a sectional view taken along line SS.

FIG. 6 is a hydraulic control mechanism diagram.

7A is a side view of the switching mechanism of the elevation control valve, and FIG.

FIG. 8 is a diagram showing the operation of the switching mechanism of the elevation control valve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Engine 3 Transmission case 6 Wheel 7 Main frame 9 Planting device 10 Seedling table 30 Center float 70 Stay pipe (mudguard member) 71 Weight 72 Stand

Claims (2)

[Claims] 1. A rice transplanter having a float whose front portion is vertically movable with respect to a body of a rice transplanter, wherein when the float rises to an uppermost position, the float comes into close contact with a front upper surface of the float and is placed on the float. A rice transplanter characterized by having a mudguard member for preventing mud from getting on. 2. A rice transplanter in which a transmission shaft for transmitting power to each part of a planting portion is accommodated in a frame pipe of a planting portion provided in parallel with an axle of a traveling wheel, wherein a shaft of the pipe is connected to the transmission shaft. A rice transplanter characterized by being shifted to an opposite side of an axle of the traveling wheel.