JP2011130670A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter whose rolling is controlled with an inclination sensor for detecting the lateral inclination angle of a vehicle body and can also manually easily be controlled, when the rolling control is stopped in response to the conditions of a field, wherein a worker can manually easily set the lateral inclination angle of the vehicle body in response to the conditions of the field in a simple constitution to perform a seedling-transplanting work. <P>SOLUTION: In the seedling transplanter in which a rolling actuator for changing the relative heights of right and left vehicle wheels to control the lateral inclination of the vehicle body, and right and left upward or downward operated seedling planting tools for planting seedlings in the field are disposed, the rolling actuator is operated with a rolling control valve capable of being switched in response to the inclination detection of the vehicle body, and a rolling operation lever 71 for switching the rolling control valve into an automatic control state for automatically switching the valve in response to the inclination detection of the vehicle body or into a manual operation state enabling that the worker can arbitrarily manually switch the valve are disposed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a seedling transplanter provided with a posture control device for controlling the posture of a vehicle body.

  The left and right wheel cases with left and right traveling rear wheels are moved up and down by the detection of the ground sensor, and the vehicle body is controlled to move up and down, and the wheel case on one side is moved up and down by the detection of the left and right inclination of the vehicle body by the pendulum type inclination sensor. A technique of a posture control device that performs rolling control of a vehicle body is known.

JP 2002-46661 A

  What is shown in the above background art is a configuration in which the seedling planting machine is controlled by a tilt sensor that detects the tilt of the vehicle body in the left-right direction, but depending on the field conditions, the rolling control may be stopped and the operator may Carry out seedling transplanting work by manually setting the right and left tilt angle of the car body according to the. It is an object of the present invention to easily perform the manual vehicle body left-right inclination angle with a simple configuration.

In order to solve the above problems, the present invention has taken the following technical means.
In other words, the invention according to claim 1 includes the left and right seedling planting tool 3 that moves up and down with the rolling actuator 17 that changes the relative height of the left and right wheels 10 to control the left and right inclination of the vehicle body 2 to plant seedlings in the field. In the seedling transplanter provided, the rolling actuator 17 is configured to operate by a rolling control valve 48 that is switched according to the detection of the inclination of the vehicle body 2, and the rolling control valve 48 is automatically operated according to the detection of the inclination of the vehicle body 2. The seedling transplanter is provided with a rolling operation lever 71 that switches between an automatic control state that is automatically switched and a manual operation state that allows an operator to arbitrarily switch operations.

  Accordingly, the invention according to claim 1 is configured such that the rolling actuator 17 is operated by the rolling control valve 48 that is switched according to the inclination detection of the vehicle body 2, and the rolling control valve 48 is detected by the inclination detection of the vehicle body 2. Since the rolling operation lever 71 is provided to switch between the automatic control state automatically switched according to the state and the manual operation state in which the operator can arbitrarily perform switching operation, the rolling operation valve 71 is operated to control the rolling control valve 48 of the vehicle body 2. In the automatic control state in which the automatic switching is performed according to the inclination detection, the vehicle body 2 is automatically controlled in a rolling manner so that the operator can concentrate on the seedling transplanting work, the workability and the work efficiency are good, and the appropriate seedling transplanting work can be performed. The In addition, when the operator operates the rolling operation lever 71 so that the operator can arbitrarily perform switching operation, when the operator operates the rolling operation lever 71, the oil path of the rolling control valve 48 is switched according to the operation. Thus, the inclination angle of the vehicle body 2 can be manually set to a predetermined angle. This is because, for example, when performing an operation of planting seedlings on the ridge A formed so as to cross the slope of a mountainous area, the vehicle body 2 tends to proceed toward the direction of going down to the valley side when the seedling transplanting operation proceeds. In addition, seedling transplanting work along the ridge A may be difficult. At this time, if the operator manually adjusts the valley side of the vehicle body 2 to be higher by operating the rolling operation lever 71, the vehicle body 2 can be prevented from going down to the valley side when the seedling transplanting operation is advanced. 2 progresses along ridge A and can perform an appropriate seedling transplanting operation.

  The invention according to claim 2 is configured such that the rolling operation lever 71 moves in conjunction with the rolling control valve 48 in the automatic control state, and the operator can arbitrarily switch the rolling control valve 48 in the manual operation state. The seedling planting machine according to claim 1.

  Therefore, in addition to the operation of the invention of the first aspect, the invention of the second aspect is interlocked with the rolling control valve 48 in which the rolling operation lever 71 is switched in accordance with the detection of the inclination of the vehicle body 2 in the automatic control state. Since the movement of the rolling control valve 48 is switched and the rolling control is performed, the operator can recognize the movement of the rolling operation lever 71. That is, the rolling operation lever 71 serves as an indicator for the rolling control. Therefore, the operator can immediately know the state of the rolling control of the vehicle body 2 and can perform safe work efficiently. In the manual operation state, the operator can arbitrarily switch the rolling control valve 48 with the rolling operation lever 71, and the inclination angle of the vehicle body 2 can be manually set to a predetermined angle.

  Moreover, the invention which concerns on Claim 3 provides the right-and-left pressure suppression tool 4 which suppresses each right and left seedling planting position by the right and left seedling planting tool 3, and the left-right vertical support device S of this left-right pressure suppression tool 4 can move left and right freely. A left and right sensor arm 47 which operates in cooperation with the operation of the left and right vertical movement support device S by the vertical movement of the left and right pressure suppressor 4 is provided at intervals. The seedling transplanter according to claim 1 or 2, wherein the rolling actuator 17 is operated by detecting the inclination of the vehicle body 2 by a change in the distance between the left and right sensor arms 47.

  Therefore, in addition to the effect | action of invention of Claim 1 or Claim 2, the invention of Claim 3 is planted soil by the left and right pressure-reducing tool 4 at the time of the seedling planting action by raising and lowering the left and right seedling planting tool 3. Plant the seedlings in a proper posture by pressing down the surface. At this time, the left and right pressure suppression tools 4 are moved up and down by the left and right vertical support devices S in accordance with the height of the farm scene, and are pressed down so as to act at a constant height. The height difference or inclination of the seedling planting scene is detected by the change in the interval between the left and right sensor arms 47, and the rolling actuator 17 is operated to change the relative height of the left and right wheels 10 to move the vehicle body 2 to the desired left and right. Rolling control is performed to maintain an inclined posture. Moreover, the left-right up-and-down support device S is provided so that it can move right and left, and the left-right space | interval of the left-right pressure suppressor 4 can be changed, and the pressure-reducing action corresponding to the change of a streak can be performed. In addition, when the left and right wheels 10 travel over two heels A and plant one seedling on each heel A, if the height of the two heels A straddled is different, each heel A By adjusting the position of the left and right suppressor 4 according to the height, even if the straddle two ridges A are different in height, they can properly suppress the seedlings planted in each ridge A. The planting posture of the seedling is improved, and an appropriate seedling transplanting operation can be performed.

The invention according to claim 4 is the seedling transplanter according to claim 3, wherein the left and right sensor arms 47 are provided on the outer side of the vehicle body 2 of the left and right vertical movement support device S.
Accordingly, in the invention according to claim 4, in addition to the operation of claim 3, the left / right sensor arm 47 is provided on the outer side of the vehicle body 2 of the left / right vertical movement support device S. It can be enlarged, and seedling planting work can be done corresponding to various pods and various seedlings. That is, seedling planting work according to various field conditions and seedling conditions can be performed.

  In the invention according to claim 5, each of the left and right sensor arms 47 is configured to be rotatable about a coaxial center, and the tip ends of the left and right sensor arms 47 are extended upward in parallel with a space therebetween. An outer wire receiver 50 a and an inner wire receiver 50 b of the sensor wire 50 are provided at each of the 47 portions extending in parallel, and the outer wire receiver 50 a and the inner wire receiver 50 b are used as the rotation axis of the left and right sensor arms 47. The seedling transplanter according to claim 3 or 4, wherein the seedling transplanter is provided so as to be movable and fixed in a direction of approaching and separating, and detecting a change in the interval between the left and right sensor arms 47 by the sensor wire 50.

  Therefore, the invention according to claim 5 adds the outer wire receiver 50a and the inner wire receiver 50b to each other without removing the sensor wire 50 from the left and right sensor arms 47 in addition to the action of the invention of claim 3 or claim 4. It is possible to easily adjust the sensitivity of the vehicle body posture control simply by moving the left and right sensor arms 47. In addition, since the left and right sensor arms 47 are configured to be rotatable around the respective coaxial axes, and the distal ends of the left and right sensor arms 47 are extended upward in parallel with a space therebetween, the length of the front and rear of the part for detecting the right and left inclination The vehicle body 2 can be made compact and simple.

The invention according to claim 6 is the seedling transplanter according to any one of claims 1 to 5, wherein a rolling operation lever 71 is provided in the vicinity of the seat 33 provided on the vehicle body 2.
Therefore, in addition to the operation of the invention described in any one of claims 1 to 5, the rolling operation lever 71 provided in the vicinity of the seat 33 can be used to automatically control the rolling of the vehicle body 2 and to manually adjust the vehicle body 2. The posture can be easily changed and the work efficiency and work operability are very good.

  Therefore, according to the present invention, proper rolling control and manual tilt adjustment of the vehicle body 2 can be performed well and easily, stable vehicle body posture control can be performed with a simple configuration, and accurate seedling planting work can be performed. Yes. Therefore, the problems of the invention can be solved appropriately with a simple configuration.

It is a side view of the whole seedling transplanter. It is a top view of the whole seedling transplanter. It is a perspective view of a pressure suppression tool part. It is an expansion perspective view of the principal part. It is a perspective view of a seedling planting hopper. It is a hydraulic circuit diagram. It is an enlarged plan view for operation | movement description of the principal part. It is a top view for action explanation which shows a planting example. It is a partial cross section rear view explaining the mounting structure of the pressure suppression tool. It is a rear view of the principal part. It is a side view of the principal part. It is an expanded sectional side view of a rotary pool part. It is a front view which shows the example which mounted | wore the guide roller apparatus for linear advance.

  A two-row planting seedling planting machine according to an embodiment of the present invention will be described below. In the following description, the side on which the steering handle 8 is disposed is the rear, and the opposite side, that is, the side on which the engine 6 is disposed is the front. Then, the right hand side of the worker standing toward the front side of the machine body at the rear part of the machine body is set to the right, and the left hand side is set to the left.

  The vehicle body 2 has an engine 6 and a transmission case 7 disposed at the front of the main frame 2a, a steering handle 8 is provided at the rear end of the main frame 2a, and left and right axle housings projecting on both sides of the transmission case 7 A left and right wheel case 1 that swings up and down is provided on a rotating cylinder portion 9a that rotates about 9, and a rear wheel 10 as a wheel is mounted on an axle 11 provided at a rear end portion of the wheel case 1, The left and right rear wheels 10 and the left and right front wheels 13 mounted on the front wheel shaft 12 provided at the front end of the vehicle body 2 are configured to travel. A hydraulic pump 6 a that is driven by the power of the engine 6 is provided on the left side surface of the engine 6. A fuel tank 6b is provided on the upper side of the engine 6, and an upper part of the fuel tank 6b covers the bonnet 6c. Reference numeral 7a denotes a left / right support frame that rotatably supports a left / right rotation cylinder portion 9a having bases fixed to both left and right sides of the mission case 7.

  The vehicle body 2 is provided with a vehicle body control mechanism that controls the vehicle body position by moving the left and right rear wheels 10 up and down relative to the vehicle body. The airframe control mechanism is provided with a lift hydraulic cylinder 15 as a lift actuator from the hydraulic valve unit BU arranged on the mission case 7 to the rear, and a left and right direction of the fuselage at the tip of the piston rod of the lift hydraulic cylinder 15. An interlocking arm 16 as a long arm is attached so as to be rotatable around a vertical axis. The left and right end portions of the interlock arm 16 and the left and right housing arms 14 fixed to the rotating cylinder portion 9a are connected via a left and right rod 18 as a connecting body. The left left rod 18 incorporates a rolling cylinder 17 as a rolling actuator, and the length can be changed by extending and contracting the rolling cylinder 17.

  The elevating hydraulic cylinder 15 and the rolling cylinder 17 are operated by controlling the hydraulic oil supplied from the hydraulic pump 6a by the elevating control valve 49 and the rolling control valve 48 in the hydraulic valve unit BU. When the lifting hydraulic cylinder 15 is expanded and contracted, the left and right rear wheels 10 move up and down in the same direction by the same amount, and the aircraft moves up and down. Further, when the rolling cylinder 17 is expanded and contracted, the left rear wheel 10 moves up and down with respect to the airframe, and the airframe tilts left and right.

  Reference numeral 5 denotes a lifting sensor for detecting the upper surface of the eaves. When the lifting sensor 5 is rotated up and down, the rotation is transmitted to the lifting control valve 49 by the connecting rod 5d so that the angle of the lifting sensor 5 is restored. The lifting hydraulic cylinder 15 is operated (lifting control). As a result, the aircraft is controlled to move up and down so that the height from the upper surface of the cocoon to the aircraft remains constant, and the planting depth of the seedlings is always controlled regardless of the height change of the cocoon. The growth of the seedling after attachment is good.

  In addition, the rolling control valve 48 in the hydraulic valve unit BU is switched in conjunction with detection of the left / right inclination of the upper surface of the heel A due to a change in the relative height of the left / right pressure suppressor 4 described later. The rolling cylinder 17 is operated as appropriate to control the airframe to return to the left and right. In addition, an operation panel 8a is provided at the base of the steering handle 8, and the operation panel 8a is manually operated by the elevation control valve 49 to manually move the machine up and down and to stop the planting unit from being driven. A main clutch lever 8c for turning on and off the lever 8b and the main clutch is provided.

  That is, the rear wheel 10 on this side is connected by the rod 18 on the other side by the expansion and contraction of the rolling cylinder 17 on one side connecting the one housing arm 14 and the side end of the interlocking arm 16. The vehicle body 2 can be rolled up and down with respect to the rear wheel 10 on the left side so that the vehicle body 2 can be horizontally inclined or parallel to the soil surface. Can be controlled. And such raising / lowering control is performed by the detection of the raising / lowering sensor 5 mentioned later, and rolling control detects the right-and-left inclination state with the pressure-reducing tool 4 which performs the pressure-reducing action from the left and right sides with respect to the seedling planted at the seedling planting position. It is what you do.

  Here, in a seedling planting machine in which the left and right wheel cases 1 are provided so as to be able to swing up and down with respect to the vehicle body 2, left and right seedling planting hoppers 3 as left and right seedling planting tools arranged in parallel in the lateral direction of the machine body The rolling control is performed by swinging up and down the left and right pressure suppressor 4 that suppresses the left and right seedling planting positions. The right and left sides of the seedlings planted in the field by raising and lowering the seedling planting hopper 3 are suppressed by the pressure suppression tool 4 so that the seedling planting posture is stabilized. At this time, the left and right pressure suppression tools 4 that suppress the left and right seedling planting positions are configured to function as sensors that detect the right and left inclination of the seedling planting soil surface. Each of the left and right pressure suppression tools 4 swings up and down independently for each right and left seedling planting position, detects the horizontal inclination of the planting soil surface by the difference in height of the swinging position, The one wheel case 1 is swung up and down by detecting the inclination, and rolling control is performed so as to maintain the vehicle body 2 parallel to the soil surface.

  Further, the left and right pressure suppressors 4 are raised to the non-grounding height by swinging the left and right wheel case 1 to the non-planting position (the state in which the left and right rear wheels 10 are moved to the lowest position to raise the machine body most). It is configured to work together. That is, when the aircraft is raised high, the left and right wheel cases 1 are moved to the lowest position to raise the vehicle body 2 to the non-seedling posture, and the left and right pressure suppressor 4 is raised in conjunction with the non-action posture position. It will be in a state where it does not interfere with running and turning, and the aircraft can be turned easily.

  The seedling planting hopper 3 is arranged in a rear width between the left and right rear wheels 10 as a two-row planting configuration arranged at a constant left and right position. At the rear part of the vehicle body 2, a seedling supply device 20 for connecting and rotating and transporting a plurality of seedling cups 19 to the turntable structure is provided, and the seedling planting hopper 3 is placed on the lower side of the rear side of the body of the seedling supply device 20. Two are arranged. By rotating the seedling cup 19 in the left-right direction, the seedling cup 19 is supplied to each seedling cup 19 while taking out the seedling from the seedling tray mounted in advance on the auxiliary seedling receiving base 21 at the top of the vehicle body 2. When each seedling cup 19 is rotated and positioned above the seedling planting hopper 3, the shutter at the bottom of the cup is opened, and the stored seedling is dropped and supplied to the lower seedling planting hopper 3. It is.

  The seedling planting hopper 3 is provided so as to be capable of opening and closing to the left and right with respect to the seedling planting bracket 22, and has a hopper 23 for guiding the seedling supplied from the seedling cup 19 to fall on the upper side. The case 24 is driven up and down via parallel link arms 25 and 26. The seedling transmission case 24 is fixed to the frame 2 of the vehicle body, and is transmitted from the transmission case 7 part. The upper link arm 25 is moved up and down via the rod 28 by the crank arm shaft 27 rotated by a part of the transmission mechanism, and the seedling planting hopper 3 is planted on the locus P in the vertical direction.

  The lever 29 of the seedling planting bracket 22 and the arm 30 formed at the base end of the lower link arc 26 are connected by an operation wire 31, and this seedling planting is performed as the seedling planting hopper 3 is raised and lowered. The attached hopper 3 is opened and closed. By rotating the crank arm shaft 27, the seedling planting hopper 3 is moved up and down while drawing a substantially elliptical planting locus P, and the seedling planting hopper 3 is closed in a process of descending from the position immediately before the top dead center. Open at the lowest position, the ascending stroke remains open.

  The left and right seedling planting hopper 3 is configured to be displaced to the left and right outside from the position where it is mounted on the seedling planting transmission case 24. That is, the left seedling planting hopper 3 is configured to move up and down with respect to the seedling planting transmission case 24 via the parallel link arms 25 and 26, and the parallel link arms 25 and 26 are attached to the seedling planting transmission case 24. The base portion is bent toward the left outer side of the machine body, and a space portion K is formed in front of the left seedling planting hopper 3 attached to the distal ends of the parallel link arms 25 and 26. ing. By adjusting the left / right position (tread adjustment) of the left rear wheel 10 described later, the left rear wheel 10 can be positioned in the space K, and the left rear wheel 10 can be disposed in the immediate vicinity of the left seedling planting position. it can. Similarly, the right seedling planting hopper 3 is configured to move up and down with respect to the seedling planting transmission case 24 via parallel link arms 25 and 26, and the parallel link arms 25 and 26 are connected to the seedling planting transmission case 24. A structure in which a space K is formed in front of the right seedling transplanting hopper 3 attached to the distal ends of the parallel link arms 25 and 26 is configured to be bent from the attached base to the right outer side of the machine body. It has become. By adjusting the right / left position (tread adjustment) of the right rear wheel 10 to be described later, the right rear wheel 10 can be positioned in the space K, and the right rear wheel 10 can be arranged in the immediate vicinity of the right seedling planting position. it can. Therefore, seedlings can be planted at the position of the right and left ends of heel A.

Next, the configuration of the left / right rear wheel 10 left / right position adjustment (tread adjustment) will be described.
A left and right wheel case 1 that swings up and down is provided on each of the left and right pivot cylinders 9a that pivots around the left and right axle housings 9 that project from both sides of the transmission case 7, and are provided at the rear ends of the left and right wheel cases 1, respectively. The left and right axles 11 are provided with rear wheels 10, and right and left movable cylinders 9c fixed to the bases of the left and right wheel cases 1 are fitted and supported inside the left and right rotating cylinders 9a. The left / right movement is fixed by a bolt 9d with a left / right handle. When adjusting the left / right position (tread adjustment) of the left and right rear wheels 10, the left and right handle bolts 9d are loosened, and the left / right moving cylinder 9c is moved in the left / right direction with respect to the left / right rotation cylinder portion 9a. The position of the rear wheel 10 is adjusted, and the bolts 9d with left and right handles are tightened again to fix the left and right moving cylinder 9c to the left and right rotating cylinder 9a. In this way, the left and right rear wheels 10 can be freely adjusted in the left-right position (tread adjustment). As shown in the figure, when the rear wheel 10 is attached to the inside of the wheel case 1, the tread becomes the shortest.

  Here, an example of reciprocating four-row planting in one base will be described. The left rear wheel 10 is mounted on the inner side of the left wheel case 1 and the distance from the center of the aircraft is 450 mm (at this time, the left rear wheel 10 The rear left wheel 10 is placed in the space K in front of the parallel link arms 25 and 26 of the seedling planting hopper 3 and in the immediate vicinity of the left seedling planting position). Set the distance to 725 mm. And the planting position of the right and left planting hopper 3 and the seedling suppression position of the left and right suppression tool 4 are set to 250 mm from the center of the aircraft. Then, the left and right rear wheels 10 straddle the ridge A and drive in the respective ridges, drive each part, and plant the first and third lanes on the forward journey, and plant the second and fourth lanes on the return journey. 4 can be planted in 1 round trip.

  On the rear side of the left and right seedling planting hoppers 3, left and right side suppression tools 4 are provided for suppressing and covering the left and right sides of the seedlings planted on the soil surface (畝) A by the left and right seedling planting hoppers 3, respectively. The pressure suppressor 4 has a pair of left and right symmetrical configurations with respect to each seedling planting position, and is configured to be rotatable around the support shaft 32 so that the front side and the upper side are inclined to open left and right. It is said. A seat 33, a step 34, and the like are arranged on the vehicle body 2 so that an operator can board and supply the seedlings of the auxiliary seedling receiving base 21 to the seedling cup 19 of the seedling supply device 20. It should be noted that the opening angle of the front side of the pressure suppressor 4 can be adjusted by loosening the bolt 4a, and according to the field conditions and seedling conditions, the amount of soil closing for the seedlings planted in the field of the pressure suppressor 4 can be changed, It can be adapted to the field conditions and various seedlings.

Next, the mounting configuration and operation of the left and right pressure suppressor 4 will be described mainly based on FIGS. 1 to 3.
A pair of left and right pressure-reducing arm shafts 40L and 40R each having an outer circumferential surface formed of a regular hexagonal shaft and a circular through-hole formed in the lateral direction are attached to a pressure-reducing frame 39 attached to the rear portion of the vehicle body 2 by a left and right mounting bracket 38. The rotary shaft 40a having a circular cross section is rotatably provided with the inner ends facing each other. The left and right pressure suppression tool 4 is provided at the rear end of the left and right pressure suppression arm 41 with the front end welded and fixed to the left and right arm bosses 42 fitted to the left and right pressure suppression arm shafts 40L and 40R, respectively. The left and right arm bosses 42 are provided by a left and right lock member 43 so as to be movable and fixed in the horizontal axis direction, and the pressure suppression position of the left and right pressure suppression tool 4 can be moved and adjusted left and right.

  Here, since the left and right lock members 43 have the same configuration, the configuration of the left lock member 43 will be described. The base portion of the left lock arm 43a is rotated to the distal end portion of the left lock arm stay 42a in which the base portion is welded and fixed to the left arm boss 42. A left cam 43b is integrally formed at the base of the left lock arm 43a. A cylindrical left lock pin 43c is inserted into a left through hole 42b provided in the left arm boss 42 at a position below the left cam 43b, and the left lock arm 43a is rotated downward from an open position. In the locked position, the left cam 43b presses the upper end surface of the left lock pin 43c, the left lock pin 43c remains fitted in the left through hole 42b of the left arm boss 42, and the lower end surface of the left compression arm shaft 40L The left arm boss 42 is fixed to the left suppression arm shaft 40L by being pressed against the outer peripheral surface with a strong pressure. Similarly, when the right lock arm 43a is moved from the open position rotated upward to the lock position rotated downward, the right cam 43b presses the upper end surface of the right lock pin 43c, and the right lock pin 43c moves to the right arm boss 42. The lower end surface of the right pressure suppression arm shaft 40R is pressed against the outer peripheral surface of the right pressure suppression arm shaft 40R with a strong pressure, and the right arm boss 42 is fixed to the right pressure suppression arm shaft 40R. Therefore, it is possible to easily adjust the left / right position of the left / right pressure suppressor 4 independently by operating the left / right lock arm 43a.

  A washer 40b is rotatably provided on the rotation shaft 40a at a position where the inner ends of the left and right suppression arm shafts 40L and 40R face each other, so that the left and right suppression arm shafts 40L and 40R can rotate without interfering with each other. Yes. The rotation shaft 40a is supported and fixed by left and right support arms 38a extending downward from the left and right mounting brackets 38 provided at both left and right ends of the pressure suppressing frame 39.

  The rear end portions of the left and right pressure suppression arms 41 are respectively formed in a gate-shaped rear frame 44 when viewed from the back, and a pair of left and right pressure suppression tools (pressure suppression wheels) 4 are arranged on both left and right sides of the rear frame 44 to support the shaft. 32 is rotatably supported. The rear frame 44 is configured to be able to move in the forward direction across the upper part of the seedling planted in the heel A.

  Further, a rod through hole 44a is provided at the upper left and right central portion of the rear frame 44, and the lower portion of the vertical rod 46a having the upper end portion rotatably supported by the main frame 2a passes through the rod through hole 44a. Provided. A weak compression spring 46c having a small spring coefficient is attached between a washer 46b provided at the lower end portion of the rod 46a passing through the rod through hole 44a of the rear frame 44 and the lower surface of the rear frame 44, and a midway portion of the rod 46a. A strong compression spring 46d having a large spring coefficient is mounted between the spring stopper member T provided on the upper surface of the rear frame 44, and a pair of left and right is set by a difference in urging force between the strong compression spring 46d and the weak compression spring 46c. The pressure suppression device (pressure wheel) 4 is configured to be biased downward.

  The spring stopper member T includes a receiving plate T2 that receives the upper end of a strong compression spring 46d provided with a first through hole T1 through which the rod 46a passes, and a bolt T4 with the receiving plate T2 and a cylindrical collar T3 interposed therebetween. The stopper plate T5 and the spring plate T6 are integrated with each other. The stopper plate T5 and the spring plate T6 are mounted in a V shape with the tip side away from the position fixed together by the bolt T4, and the stopper plate T5 is provided with a second through hole T7, and the spring plate T6. The third through hole T8 is provided in the second through hole T7 and the third through hole T8 so that the rod 46a passes through the third through hole T8. The spring plate T6 is mounted in a state having a biasing force in the Z direction, and the second through hole T7 portion of the stopper plate T5 and the rod 46a are contacted with a strong force by the biasing force of the spring plate T6 in the Z direction. The spring stopper member T is in a fixed state at a certain position of the rod 46a and receives the upper end of the strong compression spring 46d.

  Therefore, when the operator grips the tips of the stopper plate T5 and the spring plate T6 with two fingers and deforms them from the V-shaped state to bring them closer together, the biasing force in the Z direction of the spring plate T6 Thus, the state where the second through hole T7 of the stopper plate T5 and the rod 46a are in contact with each other with a strong force is released, and the moving position of the spring stopper member T can be adjusted along the rod 46a. The spring pressure of the strong compression spring 46d can be adjusted, and the suppression pressure of the pair of left and right pressure suppression tools (pressure suppression wheels) 4 can be adjusted. Moreover, if the strong compression spring 46d and the weak compression spring 46c are exchanged, the adjustment range of the spring pressure further increases, and the adjustment of the pressure reduction of the pair of left and right pressure suppression tools (pressure suppression wheels) 4 with respect to the field can be performed in a wide range. The field adaptability of the pair of left and right pressure suppression tools (pressure suppression wheels) 4 is improved.

  The pressure reducing arm 41 includes a front base end arm 41a and a rear main arm 41b. A front support flange 41a ′ welded to a rear end portion of the base end arm 41a and a rear support arm 41a are provided. The front support flange 41a 'and the rear support flange 41b' are fixed by fixing bolts and nuts 41d provided through the longitudinal long holes 41c provided in the rear support flange 41b 'which are welded and fixed to the front end portion of the main arm 41b. The base end side arm 41a and the main arm 41b are integrally operated by being fixed. Accordingly, the fixing bolt and the nut 41d are loosened, and the vertical position of the main arm 41b can be adjusted with respect to the proximal end arm 41a.

  That is, if the fixing bolt and nut 41d are tightened at a position where the rear support flange 41b ′ is lowered with respect to the front support flange 41a ′, the main arm 41b is lowered with respect to the proximal end arm 41a, and the pressure reducing arm The pressure suppressor 4 provided at the rear portion of 41 is in a state of being grounded on the upper surface of the bag A at the lowered position. Conversely, if the fixing bolt and nut 41d are tightened at the position where the rear support flange 41b 'is raised with respect to the front support flange 41a', the main arm 41b is raised relative to the proximal arm 41a, and the pressure is reduced. The pressure suppressor 4 provided in the rear part of the arm 41 is in a state of being grounded on the upper surface of the heel A at a position where it has moved up.

  Therefore, when the planting depth of the seedling is changed by changing the reference position of the lift sensor 5, the left and right pressure suppressors 4 can be adjusted up and down according to the planting depth change, and appropriate pressure suppression The action can be improved and the planting posture of the seedling is improved, so that an appropriate seedling transplanting operation can be performed.

  In addition, when the left and right rear wheels 10 and the left and right front wheels 13 travel across two ridges A and plant one seedling on each ridge A, the heights of the two ridges A straddled differ from each other. When the position of the left and right pressure suppressors 4 is adjusted up and down according to the height of each heel A, even if the straddle two heels A are different in height, they are appropriate for the seedlings planted in each heel A. It can suppress the pressure and improve the seedling planting posture. Furthermore, in this embodiment, the structure is such that the aircraft is rolling controlled by the difference in ground contact height between the left and right pressure-reducing wheels 4. When the left and right pressure suppressors 4 are vertically adjusted, the rolling reference for rolling control is changed at the same time so that the height of the two ridges A straddled is changed to a different reference. When the vehicle is tilted, the rolling control of the aircraft is performed on the basis of the state where the heights of the two ridges A are different from each other, and the planting depth suitable for both of the two ridges A having different heights Now, seedlings can be properly transplanted.

The left / right up / down support device S for the left / right pressure wheel 4 is configured as described above.
Left and right sensor arms 47 that rotate together are provided at outer ends of the left and right pressure-reducing arm shafts 40L and 40R (portions extending outside the left and right support arms 38a), and the upper ends of the sensor arms 47 are respectively An outer wire receiver 50a of a sensor wire 50 that switches and operates the rolling control valve 48 is attached to one sensor arm 47, and an inner wire receiver of the sensor wire 50 is attached to the other sensor arm 47. 50b is installed. Therefore, when the left and right pressure suppressors 4 move up and down in the same direction, the distance between the upper ends of the sensor arms 47 does not change, so that the sensor wire 50 does not switch the rolling control valve 48. In addition, when the height of the upper surface of the left and right eyelids A is different and the amount of vertical movement of the left and right pressure suppressor 40 is different, the distance between the upper ends of the sensor arms 47 changes, so the sensor wire 50 switches the rolling control valve 48. Operate. For example, when the right pressure suppressor 4 is moved higher than the position of the left pressure suppressor 4 (when は A is in the left-right direction of the body and the right side is higher), the distance between the upper ends of the sensor arms 47 is reduced. The inner wire IN-W is pushed to switch the rolling control valve 48 to reduce the rolling cylinder 17 and to move the left rear wheel 10 downward so that the aircraft is parallel to the left and right sides of the aircraft. Control. On the contrary, when the left pressure suppressor 4 moves upward from the position of the right pressure suppressor 4 (when 畝 A is higher in the left-right direction of the machine body and the left side is higher), the distance between the upper ends of the sensor arms 47 increases, and the sensor wire 50 The inner wire IN-W is pulled and the rolling control valve 48 is switched to operate in the direction in which the rolling cylinder 17 is extended, and the left rear wheel 10 is moved upward so that the aircraft is parallel to the heel in the lateral direction of the aircraft. To control rolling.

  In addition, upper and lower elongate holes 47a are respectively provided at upper ends of the sensor arms 47 provided in parallel, and the outer wire receiver 50a and the inner wire receiver 50b are respectively provided in the elongate holes 47a. Is vertically adjustable and can be fixed by a fastening bolt 50c.

  Therefore, when the fastening bolts 50c are loosened and the outer wire receivers 50a and the inner wire receivers 50b are moved downward and fixed to the sensor arms 47, the inner wires Since the push-pull amount of IN-W is reduced (the distance KL between the rotation fulcrum of each sensor arm 47 and the outer wire receiver 50a and the inner wire receiver 50b is shortened, and the change in the vertical operation amount of the left and right pressure reducing wheels 4 is large. However, since the push-pull amount of the inner wire IN-W is small), the rolling control state becomes insensitive so that the rolling control does not operate unless the change in the vertical operation amount of the left and right pressure reducing wheels 4 is large. 50c is loosened, and each outer wire receiver 50a and inner wire receiver 50b are placed above each sensor arm 47. Is moved and fixed, the push-pull amount of the inner wire IN-W increases with respect to the change in the vertical operation amount of the left and right pressure reducing wheels 4 (the rotation fulcrum of each sensor arm 47, the outer wire receiver 50a and the inner wire Even if the distance KL to the wire receiver 50b is long and the change in the vertical operation amount of the left and right pressure reducing wheels 4 is small, the push-pull amount of the inner wire IN-W is large). Even if is small, it becomes a sensitive rolling control state in which the rolling control is activated. Therefore, the sensitivity of rolling control can be easily adjusted by simply sliding the outer wire receiver 50a and the inner wire receiver 50b on the sensor arms 47 without removing the sensor wires 50 from the sensor arms 47. . Each sensor arm 47 is engraved with a mark M indicating a sensitivity adjustment position.

  The outer wire receiver 50a is provided with a recess 50a 'along the tensioning direction of the inner wire IN-W, and the engagement piece 50b' of the inner wire receiver 50b is fitted in the recess 50a '. Even if the vertical operation amount of the left and right pressure reducing wheels 4 fluctuates greatly, the engagement piece portion 50b ′ of the inner wire receiver 50b contacts the front and rear ends of the recess portion 50a ′ of the outer wire receiver 50a, The opening amount of the upper end portion provided in parallel with each sensor arm 47 is restricted. That is, each sensor arm 47 is configured to operate by an amount necessary for detecting the rolling control (a situation in which each sensor arm 47 is largely opened to cut the inner wire IN-W can be avoided).

  As described above, the left and right pressure-reducing arm shafts 40L and 40R are provided inside the left and right support arms 38a provided on the left and right outer sides of the pressure-reducing frame 39, and the front ends are connected to the left and right arm bosses 42 respectively fitted to the left and right pressure-reducing arm shafts 40L and 40R. The left and right pressure suppression tools 4 are provided at the rear ends of the left and right pressure suppression arms 41 fixed by welding, and the left and right arm bosses 42 are provided so as to be movable and fixed in the horizontal axis direction by operating the left and right lock arms 43a of the left and right lock members 43. Since the crushing position of the crushing tool 4 can be moved and adjusted left and right, and the left and right sensor arms 47 are arranged at the outer ends of the left and right crushing arm shafts 40L and 40R, the left and right crushing wheels 4 are crushed. Within the width of the frame 39, the left and right movement can be adjusted to a large extent, and the space adjustment area is widened, so that seedlings can be planted in response to various wrinkles and various seedlings. . That is, seedling planting work according to various field conditions and seedling conditions can be performed.

  Further, the left and right sensor arms 47 are provided facing upward, and the upper ends thereof are configured to be parallel to each other. An outer wire receiver 50a for the sensor wire 50 for switching the rolling control valve 48 to one of the sensor arms 47 is provided. The inner wire receiver 50b of the sensor wire 50 is attached to the other sensor arm 47 to switch the rolling control valve 48, and the connecting portion of the left and right sensor arms 47 and the sensor wire 50 is connected to the left and right sides of the pressure reducing frame 39. Since the central position is the upper position of the main frame 2a, the front and rear lengths of the parts for detecting the left / right inclination can be shortened, and the fuselage can be made compact and concise, and the main frame 2a has the left / right sensor arm. 47 and the sensor wire 50 are protected, and the right and left rolling control of the machine is properly controlled. Obtain.

  Further, in the middle part of the sensor wire 50, a rolling control reference for changing the position of the outer wire 50e with respect to the inner wire 50d and switching the rolling control valve 48 according to the relative vertical height variation of the left and right pressure suppression tools 4 to perform rolling control is provided. A rolling control change operation tool 50f to be changed is provided. Therefore, when the rolling control change operation tool 50f is operated in the direction of the arrow tree which is the left and right direction of the machine body and is locked by the guide 50g, the rolling control reference moves to the operated side (the neutrality of the rolling control valve 48). The position is moved), that is, if it is operated in the direction of the left arrow, the rolling control for correcting the left inclination of the aircraft becomes sensitive, and conversely, if it is operated in the direction of the left arrow, the rolling control for correcting the right inclination of the aircraft is sensitive. Become.

  The rolling control change operation tool 50f is provided on the seat side of the front side of the seedling supply device 20 behind the seat 33 on which the operator is seated, so that the worker performs the seedling supply operation to the seedling supply device 20. It is possible to easily change the rolling control reference by operating the rolling control changing operation tool 50f according to the field conditions, and it is possible to perform an appropriate seedling transplanting operation and to improve workability and working efficiency.

Here, the configuration for switching the rolling control valve 48 will be described in detail.
The rolling control valve 48 is provided with a rotary pool shaft 48a for switching its oil path so as to protrude outward, and a collar 65 is first loosely fitted to the rotary pool shaft 48a from the outer end and manually moved to the outside. The operating arm 66 and the automatic operating arm 67 are freely fitted so as to be freely rotatable, and further, an oval hole 68a formed in the base portion of the lever stay 68 is formed on the outer side of the operating arm 66 and the automatic operating arm 67. 48b is fitted, and a washer 69 is interposed on the outside thereof, and each member (collar 65, manual operation arm 66, automatic operation arm 67, lever stay 68) is stopped by bolts 70 so as not to be pulled outward. . Therefore, when the lever stay 68 is rotated, the rotary pool shaft 48a is rotated integrally with the lever stay 68 so that the oil passage of the rolling control valve 48 is switched.

  An end portion of the sensor wire 50 on the side of the rolling control valve 48 is fixed to a lower end portion of the automatic operation arm 67, and an upper engagement groove 67a having a shape opened downward at the upper end portion of the automatic operation arm 67. The one end 71a of the rolling operation lever 71 is engaged with the upper engagement groove 67a. Reference numeral 72 denotes a tension spring which is stretched between a spring locking arm 73 fixed to the hydraulic valve unit BU and a lower end portion of the automatic operation arm 67, and urges the sensor wire 50 to be stretched. To do. Further, the gripping portion 71 a of the rolling operation lever 71 is disposed so as to be in the vicinity of the side portion of the seat 33.

  The upper end of the manual operation arm 66 is provided with a lower engagement groove 66a that is open upward, and one end 71a of the rolling operation lever 71 is engaged with the lower engagement groove 66a. It has become. Reference numeral 74 denotes a tension spring which is stretched between a spring locking arm 73 fixed to the hydraulic valve unit BU and a lower end portion of the manual operation arm 66. When operating the rotary pool shaft 48a for switching the oil passage, the manual operation arm 66 is urged so that the rolling control valve 48 is in a neutral position.

  Further, as described above, the lever stay 68 is supported in a state in which the base portion is fitted to the distal end portion of the rotary pool shaft 48a, and is bent at a right angle to the rear side of the fuselage, and is perpendicular to the rear side of the fuselage. The rolling operation lever 71 is rotatably supported by a support pin 75 that is welded to a bent portion and is provided in the left-right direction of the machine body. Then, the base of the leaf spring 76 is fixed to the distal end side of the support pin 75 of the lever stay 68, and the distal end 76 a of the leaf spring 76 is configured in a triangular shape with the distal end side pointed when viewed from the side of the machine body. It extends to the contact position.

  Therefore, when the operator grips and pushes the grip 71b of the rolling operation lever 71 downward, the rolling operation lever 71 rotates around the support pin 75 to a position over the tip 76a of the leaf spring 76 as shown. The one end 71a of the ring operation lever 71 is engaged with the upper engagement groove 67a at the upper end of the automatic operation arm 67. Then, as described above, the sensor wire 50 is actuated by the phase difference between the left and right pressure suppressors 40 due to the difference in the height of the upper surface of the bag A, and the automatic operation arm 67 is rotated. The lever stay 68 integrated with the rolling operation lever 71 is rotated by being transmitted to the rolling operation lever 71 engaged with the joint groove 67a, and the rotary pool shaft 48a connected to the base portion of the lever stay 68 is rotated. The oil passage of the rolling control valve 48 is switched, and the vehicle body 2 is subjected to rolling control so that both the right and left seedling planting hoppers 3 have an appropriate planting depth, so that an appropriate seedling transplanting operation can be performed.

  At this time, the sensor wire 50 is actuated by the phase difference between the left and right pressure suppressors 40, the rotary pool shaft 48a is rotated, the oil passage of the rolling control valve 48 is switched, and rolling control is performed. Since the operator can recognize by the rotation of the gripping portion 71b, that is, the rolling operation lever 71 serves as an indicator for rolling control, the operator can immediately know the state of rolling control of the vehicle body 2 and perform safe work. It can be done efficiently.

  On the other hand, when the operator grasps the grip 71b of the rolling operation lever 71 and pulls it upward, the rolling operation lever 71 rotates around the support pin 75 and is fixed at a position over the tip 76a of the leaf spring 76. The one end portion 71 a of the ring operation lever 71 engages with the lower engagement groove 66 a of the upper end portion of the manual operation arm 66. Then, the sensor wire 50 is actuated by the phase difference between the left and right pressure suppressors 40 due to the difference in the height of the upper surface of the heel A, the automatic operation arm 67 is rotated, the rotary pool shaft 48a is rotated, and the oil of the rolling control valve 48 is rotated. The rolling control for switching the path is stopped, and when the operator grips the gripping portion 71b of the rolling operation lever 71 and rotates it in the left-right direction, the rotary connected to the base portion of the lever stay 68 according to the rotation operation. The spool shaft 48a rotates to switch the oil passage of the rolling control valve 48, so that the inclination angle of the vehicle body 2 can be manually set to a predetermined angle. This is because, for example, when performing an operation of planting seedlings on the ridge A formed so as to cross the slope of a mountainous area, the vehicle body 2 tends to proceed toward the direction of going down to the valley side when the seedling transplanting operation proceeds. In addition, seedling transplanting work along the ridge A may be difficult. At this time, the operator operates the rolling operation lever 71 so that the trough side of the vehicle body 2 is manually raised (that is, the trough-side rear wheel 10 is moved lower than the summit-side rear wheel 10). Thus, the vehicle body 2 can be prevented from descending to the valley side when the seedling transplanting operation proceeds, and the vehicle body 2 can travel along the heel A to perform an appropriate seedling transplanting operation.

  After the operator grasps the gripping portion 71b of the rolling operation lever 71 and rotates to manually determine the tilting posture of the vehicle body 2, when the operator releases the hand from the gripping portion 71b, the tension spring 74 is moved. Thus, the manual operation arm 66 is returned so that the rolling control valve 48 is in the neutral position, and the manual leaning posture of the vehicle body 2 can be maintained.

  Therefore, the rolling operation lever 71 provided in the vicinity of the seat 33 can easily change the rolling control state of the vehicle body 2 and the posture of the vehicle body 2 manually, and the work efficiency and work operability are very good.

  On the other hand, the raising / lowering control for raising and lowering both the left and right rear wheels 10 with respect to the vehicle body 2 by extending and lowering the raising / lowering hydraulic cylinder 15 is performed by the detection of the raising / lowering sensor 5 that detects the interval between the machine body and the field scene (upper surface of the basket A). The lift control valve 49 is switched.

  That is, the lift sensor support plate 5a is rotatably supported on the tip of a support arm 39a fixed to the front portion of the pressure reducing frame 39 by a support shaft 5b provided in the left-right direction of the machine body, and the right side of the lift sensor support plate 5a. The lift sensor 5 is provided with a bolt 5c so that the left and right positions can be adjusted. Then, when the elevation sensor support plate 5a rotates around the support shaft 5b in the height variation detection of the farm scene (the A surface) of the elevation sensor 5, the elevation control valve 49 is connected via the connecting rod 5d. Is configured to be switched.

  That is, the field grounding unit 5 ′ at the lower end of the lifting sensor 5 is in contact with the field scene (畝 A plane), and when the field scene (畝 A plane) becomes higher, the field grounding unit 5 ′ at the lower end of the lifting sensor 5 is Up and down, the lift sensor support plate 5a is rotated in the direction B around the support shaft 5b, the connecting rod 5d is pressed to switch the lift control valve 49, and the lift hydraulic cylinder 15 is operated to extend to the left and right. The wheel 10 is moved down so as to be lifted and lowered so that the distance between the machine body and the farm scene (the A plane) is an appropriate position. On the other hand, when the field scene (畝 A surface) is lowered, the field ground contact portion 5 ′ at the lower end of the lift sensor 5 is moved downward to rotate the lift sensor support plate 5a around the support shaft 5b in the anti-direction. By pulling the connecting rod 5d, the lifting control valve 49 is switched and operated, and the lifting hydraulic cylinder 15 is operated in the direction of contraction to move the left and right rear wheels 10 upward, so that the distance between the machine body and the farm scene (畝 A surface) is increased. The elevator is controlled to be in an appropriate position.

  The field grounding unit 5 ′ at the lower end of the lifting sensor 5 is provided by adjusting the left and right positions so as to be positioned in front of the right pressure suppressor 4, and the field grounding unit 5 ′ at the lower end of the lifting sensor 5 is grounded ( The right seedling planting hopper 3 plantes seedlings on the heel A side), and the right suppression tool 4 then suppresses the seedlings.

  Further, the reason why the lifting sensor 5 is positioned on the right side in the left-right direction of the aircraft (the front of the right seedling planting hopper 3 where the seedling is planted and the front of the right pressure suppressor 4) is that the rolling cylinder 17 is located on the left side of the aircraft. The left rear wheel 10 is moved up and down to perform rolling control of the aircraft, so that the right side opposite to the side where the rolling cylinder 17 is arranged and the left and right sides of the aircraft (moves up and down by rolling control of the aircraft). By placing the lift sensor 5 on the left rear wheel 10 and the right side opposite to the left and right sides of the machine, the right side of the machine does not move up and down greatly during rolling control. ) Can be detected, the aircraft can be lifted and lowered appropriately without being greatly affected by the rolling control, and the seedling can be planted properly at an appropriate seedling planting depth.

  Further, the distance L2 between the support shaft 5b and the pressure-repressing position of the left pressure-reducing tool 4 is greater than the distance L1 between the support shaft 5b and the field ground contact portion 5 ′ at the lower end of the lift sensor 5 (the pressure-reduction position of the right pressure-reducing tool 4). The support shaft 5b is arranged so as to be long. This is because the rolling cylinder 17 is provided on the left side of the fuselage, so that the left side of the fuselage has a large amount of change in vertical movement due to the influence of rolling control, but the right side of the fuselage is less affected by rolling control. By displacing from the left and right center position to the right side, the lifting sensor 5 is not easily affected by the rolling control, and appropriate lifting control of the body can be performed.

  On the other hand, the rear ends of the inner wires 51a of the lift wires 51 are connected to the base ends of the left and right sensor arms 47, the front ends of the inner wires 51a of the lift wires 51 are fixed to the machine body, and the front ends of the outer wires 51b are It is connected to a midway part of the left and right housing arms 14 whose base is fixed to the rotating cylinder part 9a so that the position can be adjusted. The rear ends of the outer wires 51b of the lift wires 51 are fixed to the left and right support arms 38a, respectively, so that their positions can be adjusted.

  Therefore, by connecting the lift wires 51, the left and right wheel cylinders 9a are rotated by the downward movement of the left and right wheel cases 1 (downward movement of the left and right rear wheels 10), and the left and right housing arms 14 are rotated backward. As a result, the left and right inner wires 51a are pulled, the left and right sensor arms 47 can be rotated in the B direction, and the left and right pressure-reducing arms 41 can be forcibly turned upward. When the aircraft is raised by moving it, the left and right pressure suppressors 4 are automatically housed and rotated upward so that the aircraft can be easily turned. In addition, the connecting part of the inner wire 51a rear end of each lift wire 51 and the left and right sensor arm 47 is provided with a flexible mechanism constituted by a long hole 51c, and by normal elevating control and rolling control of the left and right rear wheels 10. In the downward movement, the left and right pressure suppressor 4 is not accommodated and rotated upward, and the left and right pressure suppressor 4 is automatically accommodated and rotated upward only when the left and right rear wheels 10 are greatly lowered when the aircraft is turning. ing.

  Since each lift wire 51 is connected to the left and right sensor arms 47 arranged on the left and right outer sides of the pressure suppression frame 39, the adjustment portion of each lift wire 51 is located on the left and right outer sides of the pressure suppression frame 39, and The upper operation position can be easily adjusted and the workability is good.

  Further, the right lift wire 51 that pulls the right sensor arm 47 connected to the right pressure suppressor 4 is connected to the left rotating cylinder portion 9 a that moves the left rear wheel 10 up and down, and is connected to the left pressure suppressor 4. The left lift wire 51 that pulls the left sensor arm 47 is connected to the right rotating cylinder portion 9a that moves the right rear wheel 10 up and down. That is, the right sensor arm 47 (right pressure suppressor 10) is moved upward by the downward movement of the left rear wheel 10, and the left sensor arm 47 (left pressure suppression tool 10) is moved upward by the downward movement of the right rear wheel 10. . This is because the rolling control is performed by switching the rolling control valve 48 and operating the rolling cylinder 17 by the relative position fluctuation of the left and right sensor arm 47 due to the relative vertical height fluctuation of the left and right pressure suppressor 10 as described above. If the left rear wheel 10 is moved downward, the left sensor arm 47 (left pressure suppressor 10) is moved upward, and the right rear wheel 10 is moved downward to move the right sensor arm 47 (right pressure suppressor 10). Then, when the right crushing tool 4 is moved upward and the right sensor arm 47 is displaced and the rolling control is activated and the aircraft is in a horizontal state, the left and right rear wheels 10 are moved downward for turning the aircraft. With the rolling control, the left and right rear wheels 10 move downward while the rolling cylinder 17 is operating, and the airframe is inclined when the airframe is at its highest position. Therefore, the right sensor arm 47 (right pressure suppressor 10) is moved upward by the downward movement of the left rear wheel 10, and the left sensor arm 47 (left pressure suppression tool 10) is moved upward by the downward movement of the right rear wheel 10. Thus, when the left and right rear wheels 10 are moved downward for turning the body or moving the body, the left and right lift arms 51 are used to switch the rolling control valve 48 so that the left and right sensor arms 47 return the rolling cylinder 17 to the neutral position. The aircraft rises horizontally. Therefore, the aircraft is in a horizontal state during turning, and the turning operation can be performed easily and easily. In addition, when the aircraft is lifted and moved between fields (in the case of traveling on the road), the aircraft is in a horizontal state, and the aircraft can be driven well and easily.

  When the pressure reducing arm 41 is moved and adjusted to the left and right, a cutout mark 55 is formed around the pressure reducing arm shaft 40 in order to facilitate the adjustment operation, and the position of the arm boss 42 is set at the position of the mark 55. By combining them, it is possible to perform pressure reduction positioning to an accurate planting strip position.

  Reference numeral 60 denotes a left and right irrigation tank for storing water for irrigation supplied to the inside of each of the left and right seedling planting hoppers 3 and is placed in left and right tank support frames 61 fixed to the left and right wheel cases 1 respectively. That is, the left and right irrigation tanks 60 are respectively supported by the left and right tank support frames 61 fixed to the left and right wheel cases 1 and placed on the upper surfaces of the left and right wheel cases 1. Accordingly, the aircraft travels and carries out seedling planting work while the weights of the left and right irrigation tanks 60 are supported by the left and right wheel cases 1, respectively. The weight is not applied to the airframe main body, and is supported by the left and right rear wheels 10 pivoted on the left and right wheel cases 1, and the weight fluctuation of the irrigation tank 60 is prevented from affecting the airframe as much as possible. It can show proper driving performance and plant seedlings properly.

  Further, the central position of the irrigation tank 60 in the front-rear direction is slightly in front of the axle 11, and the wheel case 1 is gently inclined rearward at the time of seedling planting work, so that the center of gravity of the irrigation tank 60 is in front of the axle 11, and left and right Since the weight of the irrigation tank 60 is applied between the front wheel 13 and the rear wheel 10 in a side view of the machine body, the running performance of the machine body is stabilized and an appropriate seedling planting operation can be performed. When turning the airframe, the wheel case 1 is steeply inclined and the left and right rear wheels 10 are moved to the lowest position (the airframe is raised), so the center of gravity of the irrigation tank 60 is the axle. 11, the weight of the left and right irrigation tanks 60 hangs behind the rear wheel 10 in a side view of the fuselage, and the operator can easily push down the steering handle 8 to lower the rear of the fuselage. The turning operation is easy and efficient.

  62 is a irrigation plunger pump that sucks up the water in the left and right irrigation tanks 60 through the irrigation pipe 63 and supplies the water to the inside of the left and right seedling planting hopper 3 through the irrigation pipe 63. The base is pivotally supported by the main frame 2a. The tip of the piston rod 62 a of the plunger pump 62 is engaged with an irrigation drive crank 27 a provided on the crank arm shaft 27. Accordingly, the plunger pump 62 sucks water from the left and right irrigation tanks 60 and irrigates the inside of the left and right seedling planting hopper 3. The irrigation timing is such that the right and left seedling planting hoppers 3 are irrigated inside the left and right seedling planting hoppers 3 at the beginning of the rise when the seedlings have been planted, and are attached inside the left and right seedling planting hoppers 3. The mud soil is washed away, and the washed water can be irrigated from above the seedlings planted. If the position where the base of the plunger pump 62 is pivotally supported by the main frame 2a is configured to be adjustable so that the distance between the pivot position and the crank arm shaft 27 can be changed, the amount of water discharged from the plunger pump 62 can be changed. The water can be appropriately irrigated according to seedlings and field conditions.

  At the front end of the fuselage between the left and right front wheels 13, a heel end sensor 80 is provided to contact the upper surface of the heel A and detect the end of the heel A, and the heel end sensor 80 is attached downward with a spring. It is in a state of being energized, and it is configured to detect that the end of the kite A has reached the end of the kite A by reaching the place where there is no kite A by the forward movement of the airframe and moving down the kite end sensor 80 by the biasing force of the spring. ing. Based on the detection of the end of heel A by the heel end sensor 80, the main clutch is automatically disengaged to stop the driving of the left and right rear wheels 10 and the driving of the left and right seedling planting hopper 3 and the seedling supply device 20, Is stopped, and an alarm (for example, a buzzer or the like) is issued to notify the operator. As a result, the worker sitting on the seat 33 faces backward with respect to the advancing direction of the aircraft, and because it concentrates on seedling replenishment work, it is difficult to confirm the front of the aircraft and does not notice that the aircraft has reached the end of the heel. Although there is a risk of causing an accident such as a collision with surrounding structures, the aircraft end sensor 80 automatically stops the aircraft at the end of the kite and notifies the end of the kite with an alarm. The seedling replenishment work can be concentrated on the seedling supply device 20 without worrying about the situation in front of the machine body and the position of the end of the cocoon, thereby improving the planting work efficiency.

  The heel end sensor 80 is disposed at the right side position of the machine body in the right-and-left direction and at the position where the farm ground contact portion 5 ′ at the lower end of the lift sensor 5 and the right seedling planting hopper 3 plant seedlings and in front of the right pressure suppressor 4. That is, the field grounding part 5 ′ at the lower end of the heel end sensor 80 and the lift sensor 5 and the position where the right seedling planting hopper 3 plants the seedling and the right pressure reducing tool 4 are different from the rolling cylinder 17 arranged on the left side of the body. It is configured to be arranged in a straight line in the longitudinal direction of the aircraft on the right side of the aircraft on the opposite side. Accordingly, the kite end sensor 80 and the lift sensor 5 are located on the side opposite to the side where the rolling cylinder 17 is disposed and the right side opposite to the left and right sides of the body (the left rear wheel 10 moving up and down by the rolling control of the body and the right side opposite to the side of the body). Since the farm ground contact portion 5 'and the right seedling planting hopper 3 are arranged in a straight line in the longitudinal direction of the aircraft, the right side of the aircraft does not move up and down significantly during rolling control. The accurate end of the heel A can be detected by the heel end sensor 80, and the accurate field scene (surface A) can be detected by the lift sensor 5, and the accurate heel A can be accurately detected without being greatly affected by the rolling control. Each part can be stopped and informed by detecting the end of the machine, and the aircraft can be controlled to move up and down properly, so that the seedling can be planted properly at an appropriate seedling planting depth. As with the other members, the heel end sensor 80 is adjusted in the left-right direction by loosening the bolt 80a and moving the base of the heel end sensor 80 in the left-right direction of the machine and fixing it again with the bolt 80a. Can do.

FIG. 9 is a partial cross-sectional rear view and a side view showing in detail the mounting configuration of the pressure suppression tool (pressing wheel) 4. Here, the mounting configuration of the pressure suppression device 4 will be described in detail based on FIG. .
The rear end portion of the pressure reducing arm 41 is formed in a gate-shaped rear frame 44 in a rear view, and the base portions of the left and right support plates 90 are welded and fixed to the left and right side portions of the rear frame 44, respectively. The left and right pressure suppressor support bodies 91 are fixed by bolts 92 and nuts 93, respectively. Since the bolts 92 are fastened to the left and right support plates 90 through the elongated holes 90a provided in the left and right direction of the machine body, the left and right pressure suppressor support members 91 loosen the bolts 92 and nuts 93 to the left and right support plates 90. The left and right positions are adjustable. That is, as will be described later, since the left and right pressure suppressors 4 are provided on the left and right support plates 90, the left and right pressure suppressors 4 are respectively adjusted to the left and right positions so that the planted seedlings can be accurately suppressed. Can do.

  The left and right pressure suppressor supports 91 are each provided with an arc-shaped elongated hole 94, a bolt 95 is passed through the arc-shaped elongated hole 94, and each of the left and right pressure suppressor 4 is fixed by a nut 96. The pressure-reducing tool 4 has a base portion of the support shaft 32 welded and fixed to a pressure-reducing wheel support 97, and the pressure-reducing wheel 4 a is pivotally supported by the support shaft 32. The center C of the left and right arcuate elongated hole 94 of the left and right pressure suppressor support 91 is located at the left and right center position of the left and right pressure reducing wheel 4a, and the left and right support shafts 32 are provided toward the center C. Accordingly, when adjusting the angle of the left and right pressure suppressor 4, the bolt 95 and the nut 96 are loosened, and the left and right pressure wheel support 97 is rotated along the left and right arcuate elongated holes 94 of the left and right pressure suppressor support 91. In this case, the center C of the left and right arc-shaped elongated hole 94 is located at the left and right central position of the left and right pressure reducing wheel 4a. The height of the pressure-reducing wheel 4a of the tool 4 hardly fluctuates, and even if the angle is adjusted, there is almost no fluctuation in the pressure-reducing pressure, so that appropriate seedling repression can always be performed.

  A scraper 98 removes mud adhering to the outer peripheral surface of the pressure suppression wheel 4a, and its base is provided on the left and right pressure suppression wheel support 97, and in the same direction as the left and right pressure reduction wheels 4a when adjusting the angle of the left and right pressure suppression tools 4. Since it moves by the same amount, even if the angle of the left and right pressure suppressor 4 is adjusted, it always acts to remove mud adhering to the outer peripheral surface of the appropriate pressure reducing wheel 4a.

  FIG. 12 is a front view showing an example in which the linear guide roller device 100 is mounted, and a left and right guide roller support arm 102 is provided through a cylinder 101 provided at the front end of the vehicle body 2 so as to be adjustable in the left and right direction. Thus, the fixing bolt 103 can be fixed at the adjusted position. Guide rollers 104 are provided at both left and right ends of the guide roller support arm 102 so as to be rotatable. In addition, a rotation shaft 105 in the front-rear direction is provided in the left and right middle part of the guide roller support arm 102 so that the left and right end parts 106 of the guide roller support arm 102 are in a horizontal state, a downward direction, and an upper direction, respectively. It can be switched and fixed to the facing state.

  On the other hand, the cylinder body 101 is configured to be biased to one of the left and right sides of the vehicle body 2 selected by the operator by a tumbler mechanism biased by a spring with respect to the vehicle body 2, and the cylinder When the body 101 deviates from the left and right center position of the vehicle body 2 to the left or right, the left and right front wheels 13 are steered to correct the traveling direction of the vehicle body 2 in the same direction as the deviated direction. That is, when the cylinder 101 deviates from the left and right center position of the vehicle body 2 to the left, the steering hydraulic valve is switched in conjunction with the steering hydraulic cylinder to steer the left and right front wheels 13 so that the cylinder 101 is in the vehicle body 2. The vehicle body 2 is advanced in the left direction until it returns to the left and right center position. On the other hand, when the cylinder 101 is biased to the right from the left / right center position of the vehicle body 2, the steering hydraulic valve is switched in conjunction, and the steering hydraulic cylinder steers the left and right front wheels 13, so that the cylinder 101 is The vehicle body 2 is moved in the right direction until it returns to the left and right center position.

  Next, based on FIG. 12, the operation | work process which performs seedling transplanting operation | work using said guide roller apparatus 100 for advancing straight is demonstrated. When the seedling transplanting operation is performed on the heel A immediately adjacent to the cocoon B at the start of the seedling transplanting operation in the field, the end roller 106 side end 106 of the guide roller support arm 102 is set in a horizontal state, and the guide roller The seedling is transplanted by moving forward with 104 in contact with ridge B. At this time, if the end 106 on the side opposite to the flange B is faced upward, the work will not be disturbed.

  Then, when the vehicle body 2 is directed to the right away from the heel B, the guide roller 104 operates following the heel B, so that the cylinder body 101 is biased to the left from the left and right center position of the vehicle body 2 and is used for steering. The hydraulic valve is switched in conjunction so that the steering hydraulic cylinder steers the left and right front wheels 13 and advances the vehicle body 2 to the left until the cylinder 101 returns to the left and right center position of the vehicle body 2. The seedling transplanting operation can be performed along the heel B by proceeding so as to follow. On the contrary, when the vehicle body 2 is directed to the left approaching to the heel B, the guide roller 104 operates following the heel B, so that the cylinder body 101 is biased to the right from the left and right center position of the vehicle body 2 and is steered. The hydraulic valve for operation is switched in conjunction with the steering hydraulic cylinder to steer the left and right front wheels 13 and advance the vehicle body 2 in the right direction until the cylinder 101 returns to the left and right center position of the vehicle body 2. The seedling transplanting work can be carried out along the heel B.

  Then, when the seedling transplanting operation of the heel A immediately adjacent to the heel B is finished and the seedling transplanting operation is performed on the adjacent heel A, the wheel mark D side of the rear wheel 10 when the seedling transplanting operation is performed in the previous step With the end 106 of the guide roller support arm 102 facing downward, the guide roller 104 moves forward with the wheel contact D in contact with the wheel mark D to perform seedling transplanting work.

  Then, when the vehicle body 2 heads in the right direction away from the wheel trace D, the guide roller 104 operates following the wheel trace D, so the cylinder 101 is biased to the left from the left and right center position of the vehicle body 2, The steering hydraulic valve is switched in conjunction with the steering hydraulic cylinder so that the left and right front wheels 13 are steered so that the cylinder 101 moves leftward until the cylinder body 101 returns to the left and right center position of the vehicle body 2. The seedling transplanting operation can be performed along the wheel trace D by making it proceed so as to follow the trace D. On the other hand, when the vehicle body 2 is directed to the left approaching the wheel trace D, the guide roller 104 operates following the wheel trace D, so that the cylinder body 101 is biased to the right from the left-right center position of the vehicle body 2. The steering hydraulic valve is switched in conjunction with the steering hydraulic cylinder so that the left and right front wheels 13 are steered so that the cylinder 101 returns to the right and left center position of the vehicle body 2 and the vehicle body 2 is advanced to the right. The seedling transplanting operation can be performed along the wheel trace D by making it proceed so as to follow the wheel trace D. Similarly, if the guide roller 104 is made to follow the wheel mark D of the previous process and the vehicle body 2 is advanced to carry out the seedling transplanting work, the transplanting of appropriate seedlings with straight shoots can be performed easily even with the flat ridge A. It can be done.

2 Body 3 Left and right seedling planting tool (left and right seedling planting hopper)
4 Left and right pressure suppressor 10 Left and right wheels (left and right rear wheels)
17 Rolling actuator (rolling cylinder)
33 Seat 47 Left and right sensor arm 48 Rolling control valve 50 Sensor wire 50a Outer wire receiver 50b Inner wire receiver 71 Rolling operation lever S Left and right vertical support device

Claims (6)

  A rolling actuator (17) for changing the relative height of the left and right wheels (10) to control the left and right inclination of the vehicle body (2) and a left and right seedling planting tool (3) for vertically moving seedlings in the field are provided. In the seedling transplanter, the rolling actuator (17) is configured to operate by a rolling control valve (48) that is switched in response to the detection of the inclination of the vehicle body (2), and the rolling control valve (48) is configured to operate on the vehicle body (2 A seedling transplanter provided with a rolling operation lever (71) for switching between an automatic control state automatically switched in response to the inclination detection of () and a manual operation state in which an operator can arbitrarily switch operation.   The rolling operation lever (71) moves in conjunction with the rolling control valve (48) in the automatic control state, and the operator can arbitrarily switch the rolling control valve (48) in the manual operation state. The seedling transplanter according to claim 1.   A left and right pressure suppressor (4) for suppressing the left and right seedling planting positions by the left and right seedling planting tools (3) is provided, and a left and right vertical support device (S) of the left and right pressure suppressor (4) is provided so as to be movable left and right. The left and right pressure suppressor (4) is provided with a variable left and right interval, and the left and right sensor arms (47) that operate in cooperation with the operation of the left and right vertical movement support device (S) by the vertical movement of the left and right pressure suppressor (4) are spaced apart. 3. A structure according to claim 1 or 2, wherein the rolling actuator (17) is operated by detecting the inclination of the vehicle body (2) by changing the distance between the left and right sensor arms (47). The seedling planting machine described.   The left and right sensor arm (47) is provided on the outer side of the vehicle body (2) of the left and right vertical movement support device (S).   Each of the left and right sensor arms (47) is configured to be rotatable about a coaxial center, and its tip end portion is extended upward in parallel with a space therebetween, and is extended in parallel with the left and right sensor arms (47). An outer wire receiver (50a) and an inner wire receiver (50b) of the sensor wire (50) are provided at each of the protruding portions, and the outer wire receiver (50a) and the inner wire receiver (50b) are connected to the left and right sensor arms (47). 4. A configuration in which the distance between the left and right sensor arms (47) is detected by the sensor wire (50) so as to be movable and fixed in a direction approaching and moving away from the pivot axis of the sensor. Or the seedling transplanter of Claim 4.   The seedling transplanter according to any one of claims 1 to 5, wherein a rolling operation lever (71) is provided in the vicinity of a seat (33) provided on the vehicle body (2).

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