JP2001008509A - Walking type seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a walking type seedling transplanter capable of facilitating the turning of a machine body, and thereby, capable of improving the efficiency of seedling transplanting operation by allowing right and left crutch levers to cooperate with a structure for controlling the lifting and lowering of a machine body so that the lifting and lowering of the machine body may be controlled in the lifting direction by a specified operation. SOLUTION: This walking type seedling transplanter has right and left side crutch levers 142, 142 for operating right and left side crutches for switching the drive of right and left wheels 7, 7 respectively, and a controlling structure of the lifting and lowering of the machine body, capable of controlling the lifting and lowering of the height of the machine body by the upper and lower movement of a grounding sensor 54. The right and left side crutch levers 142, 142 cooperate with the controlling structure of the lifting and lowering of the machine body so that the lifting and lowering control of the machine body may be controlled in the lifting direction of the machine body by the turning-off operation of the drive by the right and left crutch levers 142, 142.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking-type seedling transplanter for transplanting seedlings in a field by driving the left and right wheels to rotate the body to transplant the seedlings into a field.

[0002]

2. Description of the Related Art A left and right side clutch lever for operating left and right side clutches for turning on and off the driving of right and left wheels is provided, and a body lifting control mechanism for controlling the height of the body by vertical movement of a ground contact sensor is provided. There is a walking type seedling planter.

[0003]

In a typical field transplanting operation in a field, the transplanting operation is performed while the airframe is turned around a ridge and reciprocated in the field. At that time, it is necessary to perform a turning operation to disengage one of the left and right side clutches and an operation of the aircraft elevating control mechanism that determines the vertical height position of the aircraft that is easy to turn. If so, the operation is complicated and the work efficiency is poor.

[0004]

According to a first aspect of the present invention, there is provided a left and right side clutch for operating left and right side clutches for turning on and off driving of left and right wheels. In a walking-type seedling-planting machine provided with levers 142 and 142 and a body-elevation control mechanism for elevating and lowering the body height by the vertical movement of the grounding sensor 54, the drive disconnection operation of the left and right side clutch levers 142 and 142 is performed. The left and right side clutch levers 142 and 142 and the body lifting control mechanism are linked to each other so as to control the lifting and lowering of the body in the upward direction. , 7 are provided with left and right side clutch levers 142, 142 for operating left and right side clutches 95, 95, respectively. In a walking-type seedling plant equipped with a body elevating control mechanism for controlling the body height, by the drive disconnection operation of the left and right side clutch levers 142, 142, the elevating control in the body raising direction is performed, but the elevating control in the body lowering direction is performed. So that the left and right side clutch levers 142, 14
2 is a walking-type seedling-planting machine in which the airframe elevating control mechanism is linked to the walking-type seedling-planting machine.

[0005]

According to the first aspect of the present invention, the left and right side clutch levers 142, 142 and the body lifting control are controlled so that the body is lifted and lowered in the upward direction by the drive disconnection operation of the left and right side clutch levers 142, 142. Because the mechanism is linked, when turning the aircraft on the ridge, just turn off either of the left and right side clutch levers 142, 142,
The body is controlled to move up and down so that the body can easily be turned. Therefore, the problem of the conventional example can be solved with a simple configuration, and the efficiency of seedling transplantation operation is improved.

According to a second aspect of the present invention, the left and right side clutch levers are controlled so that the right and left side clutch levers 142 and 142 perform the lifting and lowering control in the body raising direction but not the vehicle lowering direction by the drive disconnection operation of the left and right side clutch levers 142 and 142. 142, 14
2 and the body lifting control mechanism are linked, so that when turning the body on the ridge, the left and right side clutch levers 142, 14
Only by turning off either of the two, the lifting control in the body raising direction is performed, but the lifting control in the body lowering direction is not performed. Therefore, for example, the work is performed so that the grounding sensor 54 is controlled to raise and lower the body in the lifting direction. When the operator tilts the fuselage, the fuselage can be raised by the required height. However, once the fuselage is raised by the required height, the side clutch lever 14
Since the body does not descend during the turning operation of 2, the body can be turned efficiently and easily. Therefore, the problem of the conventional example can be solved with a simple configuration, and the efficiency of seedling transplantation operation is improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS <Embodiment 1> FIGS. 1 to 16 show a four-row walking type rice transplanter according to an embodiment of the present invention.

In this walking type rice transplanter 1, a transmission case 2, an engine 3, a hydraulic unit 4, a hydraulic pump 5 and the like are arranged at the front of the body, and a cylindrical portion projecting laterally from a side surface of the transmission case. 2a, transmission cases 6, 6
Are provided so as to be rotatable up and down, and wheels 7 for paddy fields are pivotally supported at the rear end of the transmission case. A main frame 9 is fixedly connected to a rear portion of the transmission case 2 on the base side thereof. The main frame 9 extends rearward through the lower portion of the fuselage, is curved upward at an intermediate portion thereof, and has a shape in which a rear portion thereof jumps up obliquely upward. A planting section frame 12 having a transmission mechanism is fixedly provided inside at a position slightly forward of the curved section, and a seedling mounting table 13 and planting apparatuses 14,... A handle 17 and a control box 18 are attached to the rear end of the main frame 9.

The planting section frame 12 includes a central case 20 located at the left and right central portions, chain cases 21 (L, R) located on both left and right sides of the central case, an upper portion of the central case 20 and the chain case 21 ( L, R) and a transmission pipe 22 (L, R) connecting the upper parts thereof.
, A total of four sets of planting devices 14,..., Are provided on the lower left and right outer portions and on the lower inner portion of the chain case 21 (L, R).

The seedling mounting table 13 is provided substantially in parallel with the rear part of the main frame 9 in a side view, and is inclined so that the front part is at a low position. The front side is a seedling mounting surface on which seedlings are mounted, and the seedling mounting surface is equally divided into four seedling mounting portions 13.
a,... Each of the seedling mounting sections 13a,... Is provided with a seedling feeder 24,. The seedling mounting table 13 has a lower back surface slidably supported by a support frame 26 extending horizontally, and a roller attached to the main frame 9 on a rail 27 fixed to the upper back surface. 28 are engaged and can reciprocate left and right. An L-shaped seedling receiving plate 29 is integrally formed with the support frame 26 in a side view, and the lowermost seedling of the seedling mounting table 13 is received by the seedling receiving plate. In a suitable place of the seedling receiving plate 29, there are formed seedling outlets 30,.

The central case 20 of the planting portion frame 12 has a helical shape in which a laterally movable rod 32 slidably supported in the axial direction and a claw 33a of a lead metal 33 attached to the laterally movable rod are engaged. And a lead camshaft 34 in which a groove 34a is formed on the outer peripheral surface (see FIG. 3). Lateral moving rod 3
Seedling support arms 35 are fixed to left and right end portions protruding outside the case 2, and the front ends thereof are connected to lower end side surfaces of the seedling mount 13. When the lead cam shaft 34 rotates, the claw 33a of the lead metal 33 moves along the groove 34a of the lead cam shaft 34, whereby the laterally moving rod 32 reciprocates left and right. The seedling table 13 also reciprocates left and right integrally with the laterally moving rod 32, and removes the seedlings at the bottom of the seedling table 13 to the seedling outlet 3.
0,...

A seedling feed arm shaft 37 is provided in parallel with the lead cam shaft 34 so as to be rotatable in the circumferential direction and movable in the axial direction. A drive cam 38 for the lead cam shaft and a pair of driven cams 39 for the seedling feed arm shaft are provided. And 40 are individually engageable. The driven cams 39 and 40 can move along the seedling feed arm axis 37,
The movement range is regulated by 42 and further separated from each other by a spring 43 interposed between them. A seedling feeding arm 45 for operating the seedling feeding device 24,... Is fixed to an end of the seedling feeding arm shaft 37 protruding outside the case, and a fixed metal 46 is attached to an appropriate position of the laterally moving rod 32 correspondingly. Have been. When the seedling mounting table 13 reaches the right end of the left and right strokes, the fixed metal 46 pushes the seedling feed arm shaft 37 to the right, whereby the drive cam 38 and the driven cam 39 engage to rotate the seedling feed arm shaft 37 once. The seedling feeding devices 24 are operated by a predetermined amount. When the seedling mounting table 13 reaches the left end of the left and right stroke, the lead metal 3
3 pushes the seedling feed arm shaft 37 to the left, the drive cam 38 and the driven cam 40 are engaged, and the seedling feed arm shaft 37 makes one rotation in the same direction, and the seedling feeders 24,. .

The planting device 14 includes a crank 50 and a link 5
1 comprising an implanted rod 52 supported by
Is rotated, the implantation claw 52a provided at the tip of the implantation rod 52 moves up and down along a predetermined trajectory, and the seedlings of the seedling mounting table 13 supplied to the seedling removal outlet 30 are moved to the field scene. (See FIG. 4).

At the lower part of the fuselage, a large center float 54 which is long in the front and back and a pair of relatively small left and right side floats 55 are provided. The arm 5 is attached to the float support rod 56 rotatably supported by the planting section frame 12.
7 are integrally attached, and attachment members 58,... Fixed to the front end of the arm and the rear of each of the floats 54, 55, 55.
Are pivotally connected to each other. Therefore, the float supporting height can be adjusted by rotating the float supporting rod 56 by the planting depth adjusting lever 60. The front part of the center float 54 is an enlargement / reduction link 61.
Are suspended so as to be able to move up and down, and the distal ends of the side floats 55 are suspended by swing links 62.

On the upper part of the fuselage, a spare seedling mounting table 65 for holding spare seedlings is supported substantially horizontally by columns 66 and 67 fixed to the main frame 9. Next, the transmission configuration of the walking rice transplanter 1 will be described (see FIG. 4). The engine output taken out to the engine output shaft 70 is transmitted from a gear 71 of the output shaft to a gear 74 of a clutch shaft 73 via a double gear 72. Gear 74
Is rotatably mounted on the clutch shaft 73 so that transmission from the gear 74 to the clutch shaft 73 can be turned on and off by the main clutch 75. The switching arm 76 for switching the main clutch 75 is connected to a main clutch lever 157 described later via a wire 77.

The clutch shaft 73 has two traveling speed change gears 8.
0, 81 and a back gear 82 are attached. The traveling transmission gears 80 and 81 are gears 85 and 86 of the traveling gear shaft 84.
, And a high speed and a low speed forward two-speed gear ratio can be obtained. When the back gear 82 and the gear 85 are indirectly engaged with each other via the counter gear 89 of the planted gear shaft 88, the reverse speed is obtained. Running gear shaft 84
Is transmitted to the wheel drive shaft 93 by gears 91 and 92. Wheel drive shaft 93 protruding into transmission cases 6 and 6
Side clutches 95, 95 are provided at both left and right end portions of the vehicle so that the driving of the left and right wheels 7, 7 can be individually turned on and off. The switching arms 96, 96 for switching the side clutches 95, 95 are operated by side clutch levers 142, 142 described later via side clutch wires 97, 97. In the transmission case 6, a transmission chain 98,
99 are provided.

The clutch shaft 73 has the gear 8
0, 81, 82, two inter-stock transmission gears 102,
103 is attached. Inter-gear shifting gear 102,1
03 is selectively meshed with the double gear 104 of the planting gear shaft 88, so that the seedling planting can be switched between two stages. The planting output is transmitted to the transmission mechanism in the planting portion frame 12 via the first, second, and third planting transmission shafts 106, 107, 108 connected by the universal joints 105, 105.

The planting output input into the planting section frame 12 is first transmitted to the planting drive shaft 110. The transmission section is provided with a planting clutch 111. The planting clutch 111 is a fixed position stop clutch, and the planting portion transmission shaft 1
When the rotation of 06, 107 and 108 stops, the planting drive shaft 110 is stopped at a predetermined rotation position. The clutch pin 112 of the planting clutch 111 is operated by the below-described planting clutch lever 147 via the wire 113. The rotation of the planting drive shaft 110 is controlled by the chain 115, which is stretched in the rear portion of the central case 20 and the chain case 21 (L, R).
Are transmitted to the crankshafts 116 on which the cranks 50 are mounted.

The seedling drive shaft 110 is transmitted to the lead cam shaft 34 via a gear train type seedling picking amount adjusting device composed of a combination of gears 117 and 118 and gears 119a and 119b. By changing it, the amount of seedlings can be switched between two stages.

The rice transplanter 1 performs lifting and lowering control and rolling control of the machine body by hydraulic pressure. The configuration of the aircraft control device is as follows (see FIG. 5). Pitching cylinder 12 for elevating the body from the rear of hydraulic unit 4
0 is provided to extend rearward, and a link plate 122 urged rearward by a spring 121 is horizontally mounted on the distal end of the piston rod. The left and right ends of the link plate 122 are connected to the cylindrical portions 6 of the transmission cases 6 and 6.
a, swing arm 124 projecting upward from 6a,
It is connected to the upper end of 124 via a connecting rod 125 (L, R). A rolling cylinder 126 that extends and contracts the connecting rod is interposed in the left connecting rod 125 (L).

In the hydraulic unit 4, as a control valve, a diverting valve 130 of the pitching cylinder 120, a diverting valve 131 of the rolling cylinder 126, and an oil diverted from the pump 5 are distributed and supplied to these diverting valves 130, 131. A valve 132 and the like are provided. Pitching switching valve 1
30 operates in conjunction with the operation of the vertical movement detection rod 135 attached to the center float 54, and the rolling switching valve 1
31 is a center axis 137, 13 of rotation of the swing links 62, 62.
It operates in conjunction with the rotation of 7.

The height of the field scene is detected by the detection rod 135, the pitching switching valve 130 is switched accordingly, and the pitching cylinder 120 expands and contracts. Then, the swing arms 124, 124 are rotated back and forth via the connecting rods 125 (L, R), and the left and right wheels 7, 7 simultaneously move up and down with respect to the body by the same amount.
As a result, the airframe moves up and down to maintain the planting depth of the seedlings constant.

The left and right inclination of the body is detected by the left and right rotation center shafts 137, 137, and the rolling switching valve 131 is switched accordingly, and the rolling cylinder 12 is turned on.
6 performs a telescopic operation. Then, the left swing arm 124 is rotated, and only the left wheel 7 (L) moves up and down with respect to the aircraft, thereby correcting the lateral inclination of the aircraft.

The operation section of the pitching switching valve 130 is configured as shown in FIG. That is, the valve shaft 170 of the pitching switching valve 130 has a square shaft portion 170a and a round shaft portion 170b.
An operation plate 171 is non-rotatably mounted on the square shaft portion 170a, and an elevation control arm 172 is rotatably mounted on the round shaft portion 170b. The operation wire 17 is inserted into the arc-shaped long hole 174 of the operation plate 171.
The hook portion 175a attached to the end of the valve 5 on the valve side is loosely fitted. The upper end of the vertical movement detection rod 135 is connected to one end of the elevation control arm 172. The engaging portion 171a of the operation plate 171 is adapted to engage with the upper surface of the bent end 172a of the elevation control arm 172. In the drawing, reference numeral 181 denotes a return spring of the operation plate 171, and 182 denotes a return spring of the elevation control arm 172.

The operation wire 175 is connected to a hydraulic lever 166 (to be described later) and left and right side clutch levers 142 and 1.
42 is operated. As shown in FIG. 7, three arms 186, 187 (L, R) are rotatably supported on a common shaft 185, and an operation wire is attached to a pin 186a provided at the end of the center arm 186. The end on the lever side of 175 is connected. The pin 186a is loosely fitted in a long hole 189a of a rod 189 attached to the other end of a hydraulic wire 188 having one end connected to the hydraulic lever 166. Pins 187a, 187a provided at the distal ends of the left and right arms 187 (L, R) have lifting wires 190 (L, R) having one ends connected to the left and right side clutch levers 142 (L, R). The other ends are respectively connected. A rod-shaped interlocking member 192 having both ends protruding left and right is fixed to the center arm 186.
When the arms 87 (L, R) rotate upward in the figure, these arms engage with the left and right ends of the interlocking member 192. In the figure, reference numeral 191 denotes a return spring of each arm.

Normally, each arm 186, 187 (L, R) is pulled downward by the return spring 191 and the hook portion 175a of the operation wire 175 is connected to the elongated hole 1
74 (see FIG. 8). At this time,
When the vertical movement detection rod 135 moves up due to the height of the field scene, the bending end 172a of the elevation control arm 172 pushes down the engagement portion 171a, thereby causing the operation plate 171 to move downward.
Rotates in the U direction, and the pitching switching valve 130 operates in the body lifting direction. When the field scene is lowered and the vertical movement detection rod 135 is moved downward, the operation plate 171 is rotated in the D direction following the elevation control arm 172 by the action of the spring 181, and the pitching switching valve 130 is moved in the machine down direction. Operate. The operation plate 171 is rotated by the hook 1
75 is carried out in a range where it fits loosely in the middle part of the long hole 174.

When the hydraulic lever 166 is pulled, the center arm 186 is turned upward, and the operation wire 175 is pulled. Thereby, the hook portion 175a engages with the end wall surface of the elongated hole 174, and the operation plate 171 is largely rotated in the U direction, so that the machine body is raised to the non-working position (FIG. 9).
reference). Also, when one of the left and right or both left and right lifting wires 190 is pulled, the left and right arms 187 push up the interlocking member 192 so that the central arm 1 is pushed.
86 is also pivoted upward, and the aircraft is raised to the non-working position in the same manner as described above. At this time, the pin 186 of the central arm
a moves in the elongated hole 189a, so that the hydraulic wire 188
Does not slack.

The handle 17 has a base fixed to the rear end of the main frame 9 and grips 140, 1 attached to the rear ends of the handle bars 17a, 17a extending right and left rearward from the base.
40 is fitted. Attachment members 141, 141 are fixedly provided at front positions of the grips 140, 140, and side clutch levers 142, 142
3, 143 so as to be rotatable up and down. The ends of the side clutch wire 97 and the lifting wire 190 are connected to the arm portion 142a of the side clutch lever 142, respectively. The connecting member 97a of the side clutch wire 97 is fixed to the arm 142a by a pin 97b, so that the side clutch wire 97 cannot be removed from the arm 142a. On the other hand, the connecting member 190a of the lifting wire 190 is hooked on the concave portion 142b of the arm portion 142a, and the lifting wire 190 is detachable from the arm portion 142a. This connecting member 19
A grip portion 190b suitable for gripping by hand is integrally formed at the rear portion of Oa.

When the right side clutch lever 142 (R) is pulled toward the grip with the lifting wire 190 connected to the arm portion 142a as shown by the solid line in FIG. 11, the right side clutch 95 (R) is disengaged. At the same time, when the body is in the raised position and the left side clutch lever 142 (L) is pulled toward the grip, the right side clutch 95 (L) is disengaged and the body is in the raised position. Release the lever and the wire 9
7, 190, the side clutch lever 1
42 returns to the original state. The return position is the stopper portion 142d
Regulated by Further, when the lifting wire 190 is removed from the concave portion 142b of the arm portion 142a as shown by a chain line in FIG. 11, the aircraft does not move up and down in conjunction with the operation of the side clutch lever 142.

Further, a planting clutch lever 147 is provided inside the right handlebar 17a (R), and a main clutch lever 157 is provided inside the left handlebar 17a (L). Since the structure of the mounting portion of both levers 147 and 157 is the same, only the structure of the mounting portion of planting clutch lever 147 will be described below.

The planting clutch lever 147 is the handle bar 1
7a (R) support shaft 148 projecting inward from the inner surface
And can be turned up and down with the thumb while gripping the grip 140. A plate 153 in which an arm 150 having a pin 149 integrally formed at the distal end is rotatably supported by the mounting member 141, and a tubular member 152 fitted to the pin 149 is fixed to the lower surface of the intermediate portion of the planting clutch lever. And the end of the implanting clutch operating wire 113 is connected to the pin 149. When the planting clutch lever 147 rotates, the pin 149 moves along the long hole 153 in response thereto, and the wire 113 is pulled or returned, the clutch is engaged at the lever raised position, and the clutch is disengaged at the lever lowered position. Becomes Planting clutch lever 1
The stroke of 47 corresponds to the bent portion 150 of the arm 150.
a is regulated by stopper portions 141a and 141b of the mounting member 141 provided so that the engaging clutch 141a engages. When the planting clutch is engaged, the planting clutch lever 147 is positioned higher than the grip 140, and when the planting clutch is off, the planting clutch lever 147 is engaged. Lever 147 is lower than grip 140 and side clutch lever 1
It is set to be positioned higher than 42.

The control box 18 includes a main switch 165 for starting and stopping the engine, a hydraulic lever 166 for raising and lowering the body, and a sensitivity adjusting lever 16 for adjusting the sensitivity of the lifting control and the rolling control.
8, 169 are provided. The hydraulic lever 166 operates along the guide groove 166a. P1 is a planting position for lowering the fuselage, P2 is a raising position for raising the fuselage, and P3 is a fixed position for fixing the fuselage in a raised state when traveling on a road or the like.

When using the walking rice transplanter 1, the main switch 165 is turned on and the engine 3 is started. During the planting operation, the hydraulic lever 166 is set to the planting position P1, and the planting clutch lever 147 is turned on. When the main clutch lever 157 is engaged, the wheels 7, 7
Is driven to start running, and the planting section is driven to start planting. The operator controls the aircraft by holding the grips 140 of the handle 17 with both hands.

When turning the machine at the end of the field or the like during reciprocating planting, the planting clutch lever 147 is turned off to stop the driving of the planting portion, and at the same time, the side clutch lever 142 inside the turning is pulled. The driving of the inner wheels 7 is stopped and the body is raised. When turning the body to the right, both the planting clutch lever 147 and the side clutch lever 142 are operated with the right hand, and this operation pushes down the planting clutch lever 147 with the thumb as shown in FIG. In addition, this is an operation to pull up the side clutch lever 142 with the other four fingers, and the user can operate it while holding the grip 140 with his palm. The planting clutch lever 147 is provided in the vicinity of the inside of the grip 140, and its operating position is higher than the grip 140 when it is turned on and lower than the grip 140 when it is turned off. With clutch lever 1
The operation of 47 is very easy. Therefore, the operation of the aircraft does not become out of order, and the planting is not disturbed.

If it is not desired to link the operation of the side clutch lever 142 and the elevating of the machine, such as when planting while rotating the machine, grasp the grip portion 190b as shown in FIG. By pulling the interlocking member 190a of the lifting wire 190 backward, the engagement between the lifting wire 190 and the side clutch lever 142 may be released. The work of engaging and disengaging the lifting wire 190 can be performed by grasping the grip portion 190b with a hand, which is very simple.

When the turning is completed, the side clutch 9
5 and the planting clutch 111 are turned on to restart planting. When the finger is released from the side clutch lever 142, the side clutch lever 142 returns to its original state by the restoring force of the wire 97, and the side clutch 95 is engaged. At this time,
Since the four fingers pulling the side clutch lever 142 are released, as shown in FIG. 15, appropriate fingers (for example, the index finger, the middle finger, and the ring finger) are gripped by the grip 140.
When the planting clutch lever 147 is pushed up with these fingers, the planting clutch 110 is engaged.

When traveling on the road, the hydraulic lever 156 is fixed at the fixed position to fix the machine at the raised position, and the planting clutch lever 147 is turned off to stop driving the planting section. <Embodiment 2> The configuration shown in FIGS. 17 and 18 is also conceivable as a configuration that can be arbitrarily switched between a state in which the lifting and lowering of the body is interlocked with the operation of the side clutch lever and a state in which the state is not interlocked. The mounting portion of the side clutch lever includes a mounting member 141 fixed to the handlebar 17 and a side clutch lever 142 and a disengagement member 200 rotatably mounted on a support shaft 143. The side clutch lever 142 and the engagement / disengagement member 200 are integrated with each other by a pin 202 while being connected by a fixing pin 201 in a detachable manner. The side clutch wire 97 is attached to the side clutch lever 142 via the attachment member 141, and the lifting wire 190 is attached to the side clutch lever 142 via the engagement / disengagement member 200.

As shown in FIG. 17, when the attachment member 141 and the engagement / disengagement member 200 are fixed by the pin 201, when the side clutch lever 142 is pulled toward the grip 140, both the side clutch wire 97 and the lifting wire 190 are pulled. As a result, the side clutch 95 is disengaged, and the body rises. Also, as shown in FIG. 18, when the fixing pin 201 is pulled out to separate the attachment member 141 and the disengagement member 200, the side clutch lever 14
Even if the side clutch 95 is pulled toward the grip 140, the side clutch wire 97 is pulled, but the lifting wire 190 is not pulled, so that the body does not rise even when the side clutch 95 is disengaged. <Embodiment 3> FIG. 19 shows the structure of a pitching switching valve operating section of a different embodiment. As in the case of the pitching switching valve operation unit in FIG.
170 is a valve shaft, 171 is an operation plate, 172 is an elevation control arm, and 135 is a vertical movement detection rod. The operation plate 171 has two arc-shaped long holes 174a and 174.
The hook portion 210 of the hydraulic wire 188 is loosely fitted in one long hole 174a, and the hook portion 211 of the lifting wire 190 is loosely fitted in the other long hole 174b. Further, as shown in FIG. 20, upper and lower two lifting wire connecting recesses 142b and 142c are formed in the arm portion 142a of the side clutch lever so that the lifting wire 190 can be selectively connected to both the recesses. Has become.

Regardless of whether the lifting wire 190 is connected to any of the recesses 142b and 142c of the side clutch lever, when the hydraulic lever 166 is operated to the planting position and the side clutch lever 142 is not pulled, Both the hook 210 of the hydraulic wire 188 and the hook 211 of the lifting wire 190 are located at the center of the elongated holes 174a and 174b (see FIG. 21), and respond to the vertical movement of the vertical movement detection rod 135 in the same manner as described above. The aircraft is raised and lowered. The hydraulic lever 16
When the user pulls 6, the hook 210 of the hydraulic wire 188 engages with the end wall surface of the elongated hole 174a (see FIG. 22), and the operation plate 171 is largely rotated in the U direction, so that the aircraft is raised to the non-working position. This is the same as described above.

When the left or right or both left and right side clutch levers 142 are pulled while the lifting wire 190 is connected to the concave portion 142b on the upper side of the side clutch lever, the hook portion 211 of the lifting wire 190 is connected to the slot 174b. It comes to rest at the end (see FIG. 23). Therefore, the operation plate 171 can rotate in the U direction but cannot rotate in the D direction. That is, the body lowering control that performs the raising / lowering control in the raising direction but does not perform the raising / lowering control in the lowering direction functions.

When the lifting wire 190 is connected to the recess 142c on the lower side of the side clutch lever and the left or right or both left and right side clutch levers 142 are pulled, the lifting wire 190 becomes higher than the above.
Is large, the hook portion 211 is
The operation plate 171 is rotated in the U direction while being engaged with the end of 4b (see FIG. 24), and the body is raised.

The operation method of this walking type rice transplanter is the same as that described in the first embodiment when the lifting wire 190 is connected to the concave portion 142c below the side clutch lever. When the clutch lever is connected to the concave portion 142b on the upper side of the clutch lever, the steering is performed in the direction described below. That is, when turning the machine body, first, the planting clutch lever 147 is disengaged to stop the driving of the planting portion, and the side clutch lever 142 inside the turning is pulled to stop driving the inside wheel 7. Then, the handle 17 is pulled up to slightly tilt the body forward. Then, since the front part of the center float 54 is pushed up, the lifting control of the lifting / lowering control is activated, and the body is raised. If the aircraft rises, return the aircraft to horizontal and make a turn. While turning, the side clutch lever 142
, The aircraft lowering regulation is maintained in a functioning state, and the aircraft remains floating from the field scene. When the turning is completed, the side clutch lever 142 is returned to drive the left and right wheels 7, 7, and the planting clutch 11
Insert 1 and restart planting. Side clutch lever 1
By returning 42, the body lowering regulation is released.

As described above, the side clutch lever 142
The aircraft does not move up and down in unison with the operation of, and if the side clutch lever 142 is pulled, the aircraft lowering control of the elevating control is configured to function. It is also possible to turn with the aircraft raised, and an operation method suitable for planting conditions is selected. <Embodiment 4> In Embodiment 1, the planting clutch lever 147 is provided at a fixed position near the inside of the right grip 140 (R), and the main clutch lever 157 is provided at a fixed position near the inside of the left grip 140 (L). However, it is convenient to provide both clutch levers 147 and 157 so that they can be attached to either the left or right side, since the main clutch lever 157 which is frequently operated can be provided on the dominant arm side according to the operator.

FIG. 25 shows an example of a lever mounting portion in which the planting clutch lever 147 and the main clutch lever 157 are interchangeable. 17 in the figure is a handle, 220
Is a mounting member fixed to the handle 17, and 221 is a lever mounting bar projecting laterally from the mounting member 220. The cylinder 222 is rotatably fitted to the lever mounting bar 221, and the lever 147 ( 157) are integrally mounted. A cylindrical body 222 is attached to the end of the lever mounting rod 221.
Of the retaining pin 223 is inserted. When the guide cover 224 for the lever is attached, the guide cover 224 is provided outside the cylindrical body 222 as shown in FIG.
It is good to fix to 0.

[Brief description of the drawings]

FIG. 1 is a side view of a walking rice transplanter according to a first embodiment.

FIG. 2 is a plan view of the walking rice transplanter shown in FIG.

FIG. 3 is a sectional view of a main part of the planting section frame.

FIG. 4 is a transmission system diagram.

FIG. 5 is a hydraulic circuit diagram.

FIG. 6 is an exploded perspective view of a pitching switching valve operation unit.

FIG. 7 is a perspective view of a connection portion between an operation wire, a hydraulic wire, and a lifting wire.

FIG. 8 is a first diagram illustrating the operation of the pitching switching valve operation unit.

FIG. 9 is a second diagram illustrating the operation of the pitching switching valve operation unit.

FIG. 10 is a perspective view of a rear part of the body.

FIG. 11 is a side view of a mounting portion of the planting clutch lever.

FIG. 12 is a bottom view of a mounting portion of the planting clutch lever.

FIG. 13 is a partial cross-sectional bottom view of a mounting portion of the planting clutch lever.

FIG. 14 is a first explanatory view of the operation of the planting clutch lever.

FIG. 15 is a second explanatory view of the operation of the planting clutch lever.

FIG. 16 is an explanatory diagram of a method of engaging and disengaging a lifting wire.

FIG. 17 is a side view of a mounting portion of the side clutch lever according to the second embodiment.

FIG. 18 is a side view of a mounting portion of the side clutch lever according to the second embodiment, which shows a state different from FIG. 17;

FIG. 19 is an exploded perspective view of a pitching switching valve operation unit according to the third embodiment.

FIG. 20 is a side view of a mounting portion of the side clutch lever according to the third embodiment.

FIG. 21 is a first view illustrating the operation of the pitching switching valve operation unit shown in FIG. 19;

FIG. 22 is a second diagram illustrating the operation of the pitching switching valve operation unit shown in FIG. 19;

FIG. 23 is a third diagram illustrating the operation of the pitching switching valve operation unit shown in FIG. 19;

FIG. 24 is an explanatory view 4 of the operation of the pitching switching valve operation section shown in FIG. 19;

FIG. 25 is a cross-sectional view of a lever mounting portion according to the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Walking type rice transplanter 2 Transmission case 3 Engine 4 Hydraulic unit 7 Wheel 13 Seedling stand 14 Planting device 17 Handle 18 Control box 75 Main clutch 95 Side clutch 111 Planting clutch 140 Grip 142 Side clutch lever 147 Planting clutch lever 157 Main clutch lever 190 Lifting wire 190b Handle

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroyuki Niiyama 1st Yonekura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. (72) Inventor: Rieki Seike, 1-Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd. Person, Hisashi Kamiya, 1-Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture, Iseki Agricultural Machinery Co., Ltd.

Claims (2)

[Claims] A left and right side clutch levers for operating left and right side clutches for turning on and off the left and right wheels are provided, and a vertical movement of a ground contact sensor raises and lowers the body height. In a walking-type seedling plant provided with a body elevating control mechanism for elevating and lowering, the left and right side clutch levers 142 and 142 are controlled so as to control the elevating and lowering of the body by the drive disconnection operation of the left and right side clutch levers 142 and 142. A walking-type seedling-planting machine characterized by being linked with a body lifting control mechanism. 2. Left and right side clutch levers 142, 142 for operating left and right side clutches 95, 95 for turning on and off the driving of the left and right wheels 7, 7, respectively. In a walking-type seedling plant provided with a body elevating control mechanism for elevating and lowering, the drive disconnection operation of the left and right side clutch levers 142, 142 performs the elevating control in the body raising direction but does not perform the elevating control in the body lowering direction. The left and right side clutch levers 142, 14
2. A walking-type seedling-planting machine characterized by linking a machine lift control mechanism 2 with an airframe elevating control mechanism.