JP2010075143A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the turning operation of a walking transplanter adopting a crawler type traveling device at a traveling part. <P>SOLUTION: The transplanter is constituted as follows. A traveling machine body 9 includes transmission cases 19 having one end sides supported by the traveling machine body 9 and the other end sides equipped with the crawler traveling devices 18, and front wheels 14 positioned in front of the crawler traveling devices 18, in the right and left both sides of the traveling machine body 9. The power from an engine 11 is transmitted to input shafts 83 provided on one end sides of the right and left transmission cases 19, and transmitted from the input shafts 83 to driving shafts 87 provided on the other end sides of the transmission cases 19. Each of the right and left crawler traveling devices 18 is equipped with a driven wheel 99 integrally rotating with the driven shaft 87, idlers 100 and 101 positioned below and in front and back of the driven wheel 99, and a crawler belt 15 wound on the driven wheel 99 and the front and rear idlers 100 and 101. The power is transmitted from the engine 11 through a steering clutch 52 to each of the right and left input shafts 83, and a steering brake 91 for braking the input shaft 83 is provided in one end side of each of the right and left transmission cases 19. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a walking type transplanter for planting seedlings in a cocoon while traveling across the heel.

2. Description of the Related Art Conventionally, there is a walking type transplanting machine that includes a transplanting device for planting seedlings on a heel on the rear side of a traveling body that straddles a heel, and has a steering handle on the rear side of the transplanting device to plant seedlings while traveling ( Patent Document 1).
The traveling body of this transplanter is provided with a front wheel that travels through the intercostal groove and a rear wheel that is located behind the front wheel on both the left and right sides of the traveling body on which the engine is mounted, and the front wheel is supported by the traveling body on one end side. The rear wheel is supported on the other end side of the front wheel support arm, and the rear wheel is supported on the other end side of the transmission case supported on the traveling machine body on one end side. A drive shaft that is driven to rotate about the left and right axes by transmitting power from the engine via a transmission mechanism is provided, and a rear wheel is attached to the drive shaft so as to be integrally rotatable.

The transplanting device is located on the front side of the steering handle and places a seedling tray on which the seedling is grown, and a seedling tray located on the front side of the seedling platform and on the seedling platform. A seedling removal mechanism for taking out the seedling from the seedling, and a planting body that is located on the lower side of the seedling removal mechanism and in which the seedling is planted in the cocoon.
The planted body can be raised and lowered and can be opened and closed. At the top dead center receiving position on the top dead center side of the vertical moving range, the seedling is supplied from the seedling removal mechanism in a closed state, and the seedling is held inside. A planting hole is formed in the cocoon by lowering and entering the cocoon, and a seedling is planted in the cocoon by discharging the seedling into the planting hole.
Japanese Patent Application Laid-Open No. 10-178821

In the field, a single multi-film may be laid across a plurality of ridges. In the vines laid with this multi-film, a predetermined interval in the longitudinal direction of the ridges is used to prevent the multi-films from lifting. The fillet is filled in the furrow groove, so the furrow groove is uneven.
In addition, the embankment may be staggered in the intercostal grooves on the left and right sides of the coral.
Then, when planting work by running the left and right front and rear wheels in the left and right intercostal grooves where the fill is staggered in this uneven state, the transplanter's front and rear and left and right shakes are large, and the planting posture of the seedling is not good. There is a problem in planting accuracy such that the seedling cannot be planted in the center of the multi-hole, and the seedling cannot be planted in the center of the multi-hole formed in the multi-film to plant the seedling.

Accordingly, the driving wheel includes a driving wheel, a front and rear idler positioned below and behind the driving wheel, and an endless belt-like crawler belt wound around the driving wheel and the front and rear idlers, and rotationally drives the driving wheel. By adopting a crawler type traveling device that circulates around the crawler belt instead of the rear wheel of the transplanter, it is possible to slow the movement of the body and improve the planting accuracy of the seedling. It is considered to be possible.
In the transplanting machine, when turning on the headland in the field, the steering wheel is pushed down and the front wheel is lifted to turn, but in the transplanting machine adopting a crawler type traveling device instead of the rear wheel, Has a problem that the turning radius is increased because the contact length is longer than that of the wheel.

Also, when turning, if it is configured so that the front idler side of the crawler type traveling device can be floated from the ground together with the front wheel around the grounding part on the rear idler side of the crawler type traveling device, the turning radius can be reduced, There arises a problem that an operation force for pushing down the steering handle is increased. In addition, farmers who are aging and becoming women and women have a desire to facilitate operations during turning.
Then, in view of the said problem, this invention aims at devising so that turning operation of the transplanter which employ | adopted the crawler type traveling apparatus for the traveling part can be performed easily.

The technical means taken by the present invention in order to solve the technical problem described above is a walking type transplanter including a traveling body that travels across a heel, a transplant device for planting seedlings on the heel, and a steering handle. Because
A traveling body includes a transmission case provided with a crawler traveling device on one of the left and right sides of a traveling aircraft body on which an engine is mounted, and one end side of which is supported by the traveling vehicle body and travels in a groove between the other ends. A front wheel located on the front side, and the power from the engine is branched in the middle and transmitted to an input shaft provided on one end side of the left and right transmission cases, and from this input shaft via a power transmission mechanism in the transmission case The left and right crawler type traveling devices are transmitted to a drive shaft provided on the other end side of the transmission case, and include a drive wheel that rotates integrally with the drive shaft, and front and rear idlers that are positioned below and behind the drive wheel. And an endless belt-shaped crawler belt wound around the drive wheels and the front and rear idlers. Power from the engine can be transmitted to the left and right input shafts via a steering clutch. It characterized in that a steering brake for braking the input shaft to one end of the left and right transmission case together are.

In addition, it is preferable that the steering brake on the same side in the left-right direction performs a braking operation in conjunction with the disengagement operation of the steering clutch.
Further, it is preferable that the steering brake brakes the input shaft after the steering clutch is disconnected.
In addition, a pair of left and right steering clutch levers are provided on the steering handle, and the left and right steering clutch levers are linked via a clutch cable to a clutch arm that intermittently operates the steering clutch on the same side in the left-right direction. The brake arm is connected to the brake arm for braking the steering brake on the same side in the left-right direction via a brake cable, and the steering clutch lever is operated on the same side in the left-right direction. It is preferable that the direction clutch and the steering brake are operated.

In the transplanter of the present invention, when turning, the steering wheel is pushed down to lift the front wheel from the ground, the steering clutch on the turning side is disconnected, and the crawler type traveling device on the turning side is braked by the steering brake. By running in such a manner, even a transplanter that employs a crawler type traveling device instead of the rear wheel can turn with a small turning radius with a light load operation that floats the front wheel.
Further, since the crawler type traveling device has a longer ground contact length than the wheel, the transplanter can turn in a stable posture.

  Further, the steering brake may be provided on the other end side of the transmission case to brake the drive shaft, but the other end side of the transmission case is the side supporting the crawler type traveling device, so mud etc. There is a risk that mud deposits adhere to the interlocking mechanism that links the steering brake and the operating member that operates the steering brake, causing the interlocking mechanism to malfunction. On the other hand, in the present invention, in particular, the steering brake is provided at a position far from the crawler type traveling device on one end side of the transmission case, so that the operating member for operating the steering brake and the steering brake are interlocked. There is no risk that mud will adhere to the interlocking mechanism and cause the interlocking mechanism to malfunction.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a walking type transplanting machine for planting soil block seedlings 2 such as vegetables at predetermined intervals while moving in the longitudinal direction of the ridge R.
The transplanter 1 includes a traveling body 3 that travels in the longitudinal direction of the heel R across the heel R, a transplant device 4 provided on the rear side of the traveling body 3, and a support frame that supports the transplant device 4. 5 and a steering handle 7 for steering the traveling body 3.
As shown in FIGS. 1 to 3, the traveling body 3 includes a traveling machine body 9, a propulsion mechanism 10 that supports the traveling machine body 9 so as to travel, an engine 11 mounted on the traveling machine body 9, and the like.

The traveling machine body 9 includes a transmission case 12 and a base 13 attached and fixed to the front part of the transmission case 12 so as to project forward from the transmission case 12. The engine 11 is mounted on the front part of the base 13. Has been.
The propulsion mechanism 10 is a wheel / crawler having a pair of left and right front wheels 14 (wheel, front infinite rotator) and a pair of left and right crawler belts 15 (rear infinite rotator) as an infinite rotator that rotates by rotating the intercostal groove M. A combined type infinite rotation propulsion mechanism is adopted.
The propulsion mechanism 10 includes a front wheel 14, a front wheel support arm 17 that supports the front wheel 14, a crawler traveling device 18 that is disposed on the rear side of the front wheel 14, and a transmission case 19 that supports the crawler traveling device 18. Are provided on both the left and right sides of the traveling machine body 9.

The left and right front wheel support arms 17 are arranged in an inclined shape so as to move upward as going rearward, and a hexagonal cylindrical mounting having a left and right axis on the rear end side (upper end side) of each front wheel support arm 17. A tool 20 is provided, and a front wheel 14 is supported on the front end side (lower end side) of each front wheel support arm 17 so as to be rotatable about an axis in the left-right direction.
A cylindrical shaft support 22 having a left and right axial core is provided on the rear lower surface side of the gantry 13, and the shaft support 22 is attached to and fixed to the traveling machine body 9 (the transmission case 12 and the gantry 13). The left and right inner ends of a pair of left and right front wheel support shafts 23 having left and right axial cores are inserted into the shaft support 22, and the left and right front wheel support shafts 23 are inserted into the shaft support 22. It is supported so as to be rotatable about a left and right axis.

The left and right outer end sides of the left and right front wheel support shafts 23 are arm attachment portions 24 formed of hexagonal cylinders having left and right axial cores. The front wheels on the same side in the left and right directions are located on the arm attachment portions 24. The front wheel support arm 17 is supported by the shaft support 22 so as to be swingable up and down around the axis of the front wheel support shaft 23 by fitting the fixture 20 of the support arm 17 so as to be integrally rotatable.
The position of the mounting tool 20 in the left-right direction with respect to the arm mounting part 17 can be freely changed. By changing the position of the mounting tool 20 in the left-right direction with respect to the arm mounting part 17, the tread of the front wheel 14 can be adjusted. ing.

The left and right transmission cases 19 are arranged on both the left and right sides of the transmission case 12 so as to extend rearward from the side surfaces of the transmission case 12, and the front end side (one end side) of each transmission case 19 is a transmission case. The rear end of the transmission case 19 is swingable up and down. The rear end of the transmission case 19 A crawler type traveling device 18 is provided on the side (the other end side).
As shown in FIGS. 2, 4, and 7, the left and right case supports 25 include an attachment member 26 fixed to the side surface of the transmission case 12, an outer cylinder 27 supported by the attachment member 26, An inner cylinder 28 inserted into the cylinder 27 is provided.

The mounting member 26 includes a flange 26A that is bolted to the side surface of the mission case 12, and a cylindrical rotation support portion 26B that has a horizontal axis that protrudes outward in the horizontal direction from the flange 26A. Yes.
The outer cylinder 27 includes a hexagonal cylindrical outer cylinder body 27A having a left and right axial core, and a cylindrical section 27B that is externally fitted around the rotational support section 26B of the mounting member 26 so as to be rotatable about the axis. The outer cylinder 27 is supported by the attachment member 26 so as to be rotatable around the axis in the left-right direction.
Further, the midway portion in the left-right direction of the outer cylinder 27 is supported by a bearing device 30 attached to a bearing frame 29 fixed to the transmission case 12 so as to be rotatable around the axis.

The inner cylinder 28 is externally extended from a left and right outer end of the main body portion 28A and a main body portion 28A that is integrally fitted to the outer cylinder main body 27A so as to be rotatable around the axis and movable in the axial direction. The cylindrical portion 28B, and a flange 28C fixed to the inner end side in the left-right direction of the cylindrical portion 28B.
On the other hand, a cylindrical shaft holder 31 having a left and right axial core is fixed to the left and right sides of the front portion of the transmission case 19, and the left and right outer end sides of the shaft holder 31 on the inner side in the left and right direction are fixed to the transmission case 19. A flange 32 is provided at the inner end of the shaft holder 31 in the left-right direction. The cylindrical portion 28B of the inner cylinder 28 is inserted into the shaft holder 31 on the inner side in the left-right direction and the inner cylinder is inserted into the flange 32 of the shaft holder 31. The flange 28 </ b> C provided at 28 is bolted.

As a result, the front portion of the transmission case 19 is supported on the side surface of the transmission case 12 via the case support 25 so as to be rotatable about the left and right axis.
Further, the outer cylinder 27 and the inner cylinder 28 are, for example, relatively moved in the left-right direction by a bolt that is screwed into a nut member 33 fixed to the outer cylinder 27 and penetrates the outer cylinder 27 and contacts the inner cylinder 28. And the relative movement in the left-right direction between the outer cylinder 27 and the inner cylinder 28 is allowed by loosening the bolts, thereby adjusting the tread of the left and right crawler type traveling devices 18. Is possible.

On the other hand, the left and right front wheel support shafts 23 are each provided with a first interlocking bracket 34 projecting rearward, and the outer cylinders 27 of the left and right case support members 25 projecting forward are second interlocking brackets 35. The first and second brackets 34 and 35 on the same side in the left-right direction are interlocked and connected by an interlocking link 36.
The outer cylinder 27 of each of the left and right case supports 25 is provided with a third interlocking bracket 37 extending upward.
Further, a shaft support 38 having a left and right axial core is supported in a front and rear direction guide groove formed on both left and right sides of the mount 13 of the traveling machine body 9 so as to be movable in the front and rear direction. A rolling shaft 39 is supported on the shaft support 38. The rolling shaft 39 is inserted so as to protrude from both the left and right sides, and is supported by the shaft support 38 so as to be rotatable around the axis in the left-right direction.

An upper lever 41 that protrudes upward is provided on one of the left and right sides of the rolling shaft 39, and a lower lever 42 that protrudes downward is provided on the other left and right of the rolling shaft 39. , 42 and the upper and lower levers 41, 42 and the third interlocking bracket 37 on the same side in the left-right direction are interlocked and connected by a connecting link 43.
The gantry 13 is provided with an elevating cylinder 44 and a rolling cylinder 45, and the elevating cylinder 44 and the rolling cylinder 45 are constituted by hydraulic cylinders.

The tube 44 a of the lifting cylinder 44 is fixed to the gantry 13, and the piston rod 44 b protrudes rearward and is connected to the shaft support 38.
Further, the tube 45a of the rolling cylinder 45 is supported by the gantry 13 so as to be rotatable about the left and right axis around the pivot 46 on the front side, and the piston rod 45b protrudes toward the rear side. It is pivotally attached to an arm 47 provided so as to protrude downward on the left side.
When the piston rod 44b of the elevating cylinder 44 is moved back and forth, the shaft support 38 and the rolling shaft 39 move back and forth, and the left and right third interlocking brackets 37 are pushed and pulled by the left and right connecting links 43, so that both the left and right transmission cases 19 are moved together. While swinging up and down, the left and right second interlocking brackets 35 swing up and down and the left and right first interlocking brackets 34 are pushed and pulled via the left and right interlocking links 36 so that both the left and right front wheel support arms 17 are vertically moved. (The left and right front wheel support arms 17 swing up and down in conjunction with the vertical swing of the left and right transmission cases 19).

As a result, the left and right front wheels 14 and the left and right crawler type traveling devices 18 simultaneously move up and down relative to the traveling machine body 9 and the front wheels 14 and the crawler belt 15 are inevitably grounded. The traveling machine body 9 is configured to move up and down with respect to the ground plane.
Further, when the piston rod 45b of the rolling cylinder 45 is advanced and retracted, the rolling shaft 39 is rotated so that one connection link 43 pushes one third interlocking bracket 37 and the other connection link 43 is the other third link. The interlocking bracket 37 is moved.
As a result, the left and right front wheels 14 and the crawler type traveling device 18 are raised relative to the traveling machine body 9, and the left and right other front wheels 14 and the crawler type traveling device 18 are lowered relative to the traveling machine body 9. And it is comprised so that the inclination with respect to the left-right direction of the traveling body 9 can be corrected.

The support frame 5 is attached and fixed to the rear upper side of the mission case 12 and extends rearward from the mission case 12 and extends upward on the rear end side. A steering handle 7 is connected to the rear end side of the motor 5.
As shown in FIGS. 5 and 6, the mission case 12 is provided with a pair of left and right output shafts 49 that protrude outward in the left-right direction from the left and right side surfaces, and the left and right output shafts 49 are on the same side in the left-right direction. The case support 25 is inserted into the mounting member 26 and the inner cylinder 28.
The left and right inner ends of the left and right output shafts 49 have a left-right abutting shape in the mission case 12, and an output gear 50 is externally fitted to the abutting portion so as to be rotatable around a left-right axis. The power from the engine 11 is transmitted to the output gear 50 via the power transmission mechanism 51 in the mission case 12, and the output gear 50 is connected to the left and right output shafts 49 via the left and right steering clutches 52. The power is configured to be transmitted intermittently.

As shown in FIG. 5, the power transmission mechanism 51 includes a first shaft 54 to which power from the engine 11 is transmitted via a pulley 53 of a belt winding transmission mechanism, and a second shaft parallel to the first shaft 54. 55 (transmission shaft) and a third shaft 56.
A gear 57 is provided on the first shaft 54 so as to be integrally rotatable. The gear 57 meshes with an idle gear 58 on the second shaft 55, and the idle gear 58 is integrated with the second shaft 55. A clutch gear 59 that is rotatable and axially movable on the second shaft 55 is detachably engaged. From the first shaft 54 via the gear 57, the idle gear 58, and the clutch gear 59, the clutch gear 59 is engaged. Power is transmitted to the second shaft 55 in an intermittent manner.

The second shaft 55 is provided with a first speed gear 60, a second speed gear 61, and a back gear 62 so as to be integrally rotatable. The third shaft 56 is movable in the axial direction of the third shaft 56. A shift gear 63 that rotates integrally with the third shaft 56 and a transmission gear 64 that meshes with the output gear 50 and rotates integrally with the third shaft 56 are provided.
The shift gear 63 is provided with a first gear 65 that meshes with the first gear 60, a second gear 66 that meshes with the second gear 61, and a third gear 67 that meshes with the clutch gear 59. By moving the shift gear 63 in the axial direction, the power of the first shaft 54 is shifted and transmitted to the third shaft 56, and the reverse gear mechanism (not shown) that engages with the back gear 62 is configured. By engaging the first gear 65 of the shift gear 63 with the gear, the rotational power of the second shaft 55 is reversed and transmitted to the third shaft 56.

The shift gear 63, the first speed gear 60, the second speed gear 61, the clutch gear 59, the back gear 62, and the reverse gear mechanism constitute a traveling system speed change mechanism (in this embodiment, the clutch gear 59 is the travel system speed change mechanism). It also serves as a 3-speed gear).
Further, when the shift gear 63 is not meshed with any of the gears, the shift gear 63 is neutral, and power transmission from the second shaft 55 to the third shaft 56 is not performed.
The power transmitted to the third shaft 56 is transmitted from the transmission gear 64 to the output shaft 49 via the output gear 50 and the steering clutch 52.

Further, the left end side of the second shaft 55 protrudes leftward from the mission case 12, and an inter-stock clutch 68 and a first inter-stock sensor 69 are provided at the protruding portion.
The first stock sensor 69 is provided at the protruding end of the second shaft 55 on one end side, and the stock clutch 68 is disposed between the first stock sensor 69 and the transmission case 12.
The stock clutch 68 is constituted by an electromagnetic clutch. When the stock clutch 68 is not in operation, power is transmitted from the second shaft 55 to the clutch shaft 70 fitted on the second shaft 55 so as to be relatively rotatable. Instead, the inter-clutch clutch 68 applies power to the coil 71 (actuates the inter-clutch clutch 68), thereby magnetizing (exciting) the rotor 72 and strongly attracting the stator 73 to power the clutch shaft 70 from the second shaft 55. Is transmitted.

A driving side gear 74A of a planting power take-out gear train 74 is externally fitted to the clutch shaft 70 so as to be integrally rotatable, and a driven side gear 74B of the planting power take-out gear train 74 is integrally rotated on the third shaft 56. A support member 75 provided freely can be externally fitted so as to be relatively rotatable.
Power is transmitted from the driven gear 74 </ b> B of the planting power take-out gear train 74 to the transplanting device 4.
The first inter-strain sensor 69 is constituted by a rotation pulse sensor, and measures (detects) the number of rotations of the second shaft 55 to generate a pulse.

As the first inter-stock sensor 69, for example, a magnetoresistive element type rotation sensor that detects the rotation of the sensor shaft that rotates integrally with the second shaft 55 by MRE is employed.
The steering clutch 52 is for cutting off the power on the side to bend when the traveling direction of the transplanter 1 is changed. As shown in FIG. 6, the shifter 76 externally fitted to the output shaft 49 is used. And an operating spring 77 that presses the shifter 76 outward in the left-right direction, and a ball 79 that is inserted into an insertion hole 78 provided in the output gear 50, and the ball 79 is fitted into the output shaft 49. A ball groove 80 is formed.

A shift fork 81 supported by the transmission case 12 is engaged with the shifter 76, and a base side of a clutch arm 82 is connected to the shift fork 81.
When the steering clutch 52 is not operated, the shifter 76 is pressed by the operating spring 77 and the shifter 76 pushes the ball 79 into the ball groove 80 as in the case of the left steering clutch 52 in FIG. When power is transmitted from 50 to the output shaft 49 via the ball 79, the clutch arm 82 is swung upward and the shifter 76 is moved to the center in the left-right direction by the shift fork 81 (the steering clutch 52 is disconnected). Then, like the steering clutch 52 on the right side of FIG. 6, the pressure of the ball 79 by the shifter 76 is released and the ball 79 comes out of the ball groove 80, so that power is transmitted from the output gear 50 to the output shaft 49. Is configured not to be performed.

Power transmission to the left and right crawler type traveling devices 18 can be independently interrupted by the left and right steering clutches 52.
On the other hand, as shown in FIG. 7, the front portion of the transmission case 19 is inserted through the left and right shaft holders 31 and is supported by the left and right shaft holders 31 so as to be rotatable about the left and right axis around the bearings. An input shaft 83 is provided.
The output shaft 49 and the input shaft 83 are connected by a connecting shaft 84 so as to be integrally rotatable.
The connecting shaft 84 includes an inner spline tube 84A that is spline-fitted to the output shaft 49, an outer spline tube 84B that is spline-fitted to the input shaft 83, and a connecting tube portion 84C that connects the spline tubes 84A and 84B. It is comprised so that it can respond to the tread adjustment of the crawler type traveling device 18 by this.

Cylindrical shaft holders 86 are fixed to the left and right sides of the rear end side (the other end side) of the left and right transmission cases 19, and a drive shaft 87 that drives the crawler traveling device 18 is inserted through the left and right shaft holders 86. The drive shaft 87 is supported by the left and right shaft holders 86 so as to be rotatable about the left and right axial centers via bearings.
The drive shaft 87 protrudes inward in the left-right direction from the shaft holder 86 on the inner side in the left-right direction.
A drive-side sprocket 88 disposed in the transmission case 19 is rotatably provided in the middle in the left-right direction of the input shaft 83 provided on the front side of the transmission case 19, and the rear side of the transmission case 19. A driven-side sprocket 89 disposed in the transmission case 19 is rotatably provided in the middle in the left-right direction of the drive shaft 87 provided in the drive shaft 87. The driven-side sprocket 88 and the driven-side sprocket 89 The endless chain 90 is wound around and the power transmitted to the input shaft 83 is transmitted to the drive shaft 87 via the drive side sprocket 88 → the chain 90 → the driven side sprocket 89. It is comprised so that it may be rotationally driven with the motive power of.

In the above configuration, power is transmitted from the input shaft 83 to the drive shaft 87 by the chain winding transmission mechanism, but other power transmission mechanisms may be employed.
A steering brake 91 is provided on the front side of each of the left and right transmission cases 19, and the steering brake 91 is fixed to a shaft holder 31 on the outer side of the front side of the transmission case 19. It is stored in.
As shown in FIG. 8, the steering brake 91 employs an internal expansion drum brake in this embodiment, and is disposed inside the brake drum 93 and a brake drum 93 that rotates integrally with the input shaft 83. A pair of brake shoes 94, a support shaft 95 that supports one end side of the brake shoe 94, a brake cam 96 interposed between the other end sides of the brake shoe 94, and a biasing force in a direction that pulls the brake shoe 94 toward each other Return spring 97.

The brake shoe 94 is swingably supported on the brake case 92 by the support shaft 95 and can be moved close to and away from the brake drum 93. The brake cam 96 is disposed outside the brake case 92. Further, the base side of the brake arm 98 is connected.
In the steering brake 91, the brake cam 96 is rotated by pulling the brake arm 98 in the direction indicated by the arrow A, whereby the brake shoe 94 spreads outward (moves close to the inner surface of the brake drum 93). The input shaft 83 is braked by the frictional force between the brake shoe 94 and the brake drum 93. As a result, the left and right crawler type traveling devices 18 can be braked independently.

As shown in FIGS. 9 to 14, the crawler traveling device 18 includes an upper drive wheel 99 (sprocket), a front idler 100 disposed on the front side and the lower side of the drive wheel 99, and the drive wheel 99. The rear idler 101 disposed on the rear side and the lower side of the rear wheel, the endless belt-like crawler belt 15 wound around the driving wheel 99, the front and rear idlers 100 and 101, and the front and rear idlers 100 and 49 are attached. A swing frame 102 that can swing back and forth around the axis X of the drive shaft 87 is also included.
The drive wheel 99 is attached and fixed to the portion of the drive shaft 87 provided on the rear end side of the transmission case 19 so as to be rotatable integrally with the shaft 86, and the drive shaft 87 is rotationally driven. As a result, the drive wheels 99 are rotationally driven, whereby the crawler belt 15 engaged with the drive wheels 99 is circulated (rotated) in the circumferential direction (longitudinal direction) so that the crawler type traveling device 18 moves forward or backward. It is configured.

  In this embodiment, the crawler belt 15 is a coreless type and narrow type crawler belt 15, and the drive protrusion 103 is arranged in the circumferential direction on the inner side of the crawler belt 15 in the width direction (left-right direction). In the outer peripheral side of the drive wheel 99, an insertion portion 104 into which the drive protrusion 103 is inserted is provided in accordance with the pitch of the drive protrusion 103, and the drive wheel 99 is driven to rotate. When the engaging wall 105 of the insertion portion 104 presses the driving protrusion 103 of the crawler belt 15, the driving force is transmitted from the driving wheel 99 to the main portion of the crawler belt 15 through the driving protrusion 103, and the crawler belt 15. Is configured to circulate in the circumferential direction.

The front and rear idlers 100 and 101 have a pair of left and right wheel portions 100A and 101A disposed on the left and right sides of the drive protrusion 103, and roll on the inner peripheral surface of the crawler belt 15 on the left and right sides of the drive protrusion 103 (therefore, the drive The protrusion 103 has a function as a guide for preventing the crawler belt 15 from being detached (derailed).
The swing frame 102 includes a main frame 106 that supports the front and rear idlers 100, 101, and a pair of swing brackets 107, 108 that support the main frame 106 in a swingable manner around the axis X of the drive shaft 87. And have.

The main frame 106 includes a front support bracket 109 that rotatably supports the front idler 100 around the left and right axes, a rear support bracket 110 that rotatably supports the rear idler 101 around the left and right axes, and the front and rear support brackets 109 and 110. And a support frame 111 located between the two.
The support frame 111 is a front plate 112 fixed to the rear wall of the front support bracket 109, a front pipe 113 extending rearward from the front plate 112, and a front extension from the front surface of the rear support bracket 110. The rear pipe 114, the support member 115 in which the rear pipe 114 is fixed to the lower part, the connection pipe 116 fixed to the upper part of the support member 115, and the gap provided between the front plate 112 and the support member 115. The adjustment unit 117 is mainly composed of a bottom plate 118 provided at the lower end of the support member 115.

The front pipe 113 and the rear pipe 114 are composed of hexagonal cylinders having axial centers in the front-rear direction, and are arranged on the center side in the width direction (left-right direction) of the crawler belt 15. It is inserted through the front side so as to be movable in the front-rear direction but not relative to the front.
The column member 115 is formed by a rectangular cylinder having a vertical axial core composed of a wall portion facing in the left-right direction and a wall portion facing in the front-rear direction, and is disposed below the drive wheel 99. The rear pipe 114 is fixed so as to penetrate the lower part of the support member 115 in the front-rear direction.
The connecting pipe 116 is formed of a cylindrical body having a left-right axial core, and the inner side in the left-right direction passes through the upper part of the support member 115 in the left-right direction and is fixed. It is made into a shape.

Further, the hole inside the connecting pipe 116 is formed in a stepped shape such that the outer side in the left-right direction is larger in diameter than the inner side in the left-right direction.
The space adjusting means 117 is disposed on the center side in the width direction of the crawler belt 15, and has a screw shaft 119 whose front end is attached and fixed to the upper end side of the front plate 112, a rear portion of the screw shaft 119 is inserted, and the column member 115. And a support cylinder 120 fixed so as to penetrate through in the front-rear direction.
The support cylinder 120 is located between the connection pipe 116 and the rear pipe 114, and the screw shaft 119 is provided with a pair of front and rear nuts 121 screwed on the front side of the support column member 115.

The rear nut 121 is an adjustment nut, and the front nut 121 is a lock nut.
By rotating the adjustment nut 121 in the tightening direction, the front plate 112 is pressed forward, the front idler 100 presses the crawler belt 15, and tension is applied to the crawler belt 15.
The bottom plate 118 is formed in an inclined shape that moves downward as it goes rearward, the midway portion is fixed to the lower end of the column member 115, the front end side is fixed to the lower surface front end side of the rear pipe 114, and the rear end side is the rear support bracket 110. It is fixed to the lower end of the front.

The outer swing bracket 107 is a rotating cylinder that is externally fitted to an inner shaft holder 86 provided on the rear end side of the transmission case 19 so as to be rotatable about the axis (around the axis X of the drive shaft 87). 122 and a pair of left and right swing arms 123 extending downward from the rotating cylinder 122.
The left and right outer sides of the connecting pipe 116 of the main frame 106 are fixed to the lower part of the swing arm 123 of the outer swing bracket 107 so as to penetrate in the left and right directions. The moving bracket 107 is configured to swing integrally around the axis X of the drive shaft 87.

A gap between the left and right swing arms 123 of the outer swing bracket 107 is closed by a cover plate.
The inner swing bracket 108 includes a rotating cylinder 124 supported on a portion protruding inward in the left-right direction from the driving wheel 99 of the driving shaft 87 so as to be rotatable around the axis X of the driving shaft 87 via a bearing. And a swing arm 125 extending downward from the rotating cylinder 124.
A connecting shaft 126 having a left and right axial core is provided on the lower portion of the swing arm 125 of the inner swing bracket 108 so as to project outward in the left and right direction and open outward in the left and right direction in plan view. A fitting member 127 formed in a U-shape is provided.

The connecting shaft 126 is inserted inside the connecting pipe 116 in the left-right direction, and a bolt 128 inserted into the connecting pipe 116 from the outer side in the left-right direction is screwed to the connecting shaft 126. The upper portion of the support member 115 is fitted in an inner shape, so that the main frame 106, the outer swing frame 107, and the inner swing frame 108 swing integrally around the axis X of the drive shaft 87. To be connected.
A scraper 130 is attached to a mounting plate 129 that is fixed to the upper rear side of the front support bracket 109 and the upper front side of the rear support bracket 110.

Each of the front and rear scrapers 130 is inserted between the left and right foil portions 100A and 101A of the idlers 100 and 101, and removes mud and the like that have entered between the foil portions 100A and 101A of the idlers 100 and 101.
The crawler type traveling device 18 of the present embodiment is configured such that the distance in the front-rear direction of the front idler 100 with respect to the drive wheel 99 is slightly longer than the distance in the front-rear direction of the rear idler 101 with respect to the drive wheel 99. .
On the other hand, a multi-film is laid over the plurality of ridges R in the field, and embankments 131 are provided in the inter-groove grooves M at predetermined intervals in the longitudinal direction of the ridges R to prevent the multi-films from lifting.

The embankment 131 is provided at the same position in the front-rear direction in the inter-groove grooves M on the left and right sides of the reed R, or is staggered by being displaced in the front-rear direction.
When a wheel travels in the intercostal groove M provided with the embankment 131, the wheel moves up from the embankment 131 to the embankment 131, so that the vertical movement of the traveling machine body 9 (the transplanter 1) is relatively large. At the same time, since the wheel goes up to the embankment 131 at a relatively short distance and descends from the embankment 131 at a relatively short distance, the variation of the planted body 158 due to the wheel getting over the embankment 131 is large.

In addition, when the embankment 131 is provided in a staggered manner in the intercostal grooves M on both the left and right sides of the ridge R, the left and right swings are also large.
On the other hand, when the crawler type traveling device 18 configured as described above travels in the intercostal groove M provided with the embankment 131, the crawler type traveling device 18 is grounded between the front idler 100 and the rear idler 101. Therefore, the ground contact length is longer than that of the wheel, and the front and rear idlers 101 follow the unevenness of the ground together with the swing frame 102 and swing around the axis X of the drive shaft 87, as shown in FIG. When the crawler type traveling device 18 gets over the embankment 131 (cove) provided in the intercostal groove M, the crawler type traveling device 18 moves up and down over a long distance compared to the wheels, so that it slowly moves up and down. Therefore, the movement of the forward / backward and left / right shaking of the transplanter 1 due to the presence of the embankment 131 can be made slow, and the crawler type traveling device 18 gets over the embankment 131. Fluctuations of that planting body 158 is small.

In particular, in the present embodiment, in the planting posture of the seedling 2, the planted body 158 is positioned between the left and right crawler type traveling devices 18 and in the vicinity of the drive shaft 87 (swinging fulcrum) in the front-rear direction. Therefore, the planting body 158 can reduce the vertical movement and the back-and-forth movement caused by the shaking of the traveling machine body 9 as much as possible, and the planting accuracy of the seedling 2 can be improved.
In addition, when traveling on a place where the embankment 131 is continuous at a predetermined interval in the longitudinal direction of the ridge R, the wheel is once removed from the embankment 131 before climbing the next embankment 131 after climbing the embankment 131. Since it completely descends, the traveling machine body 9 moves up and down greatly. However, in the crawler type traveling device 18, the front part starts to rise to the next embankment 131 while the rear part is located on the embankment 131. Compared with the above case, the vertical movement height is reduced, and the swing of the traveling machine body 9 due to the unevenness of the embankment 131 can be greatly reduced.

Therefore, the contact length of the crawler type traveling device 18 is usually formed to be larger than the interval between the embankments 131.
Further, in the crawler type traveling device 18 having the above-described configuration, no wheel is provided between the front and rear idlers 101, and a space is provided above the front and rear idlers 101 of the crawler belt 15. Thus, the crawler belt 15 is configured to be bent in a curved shape between the front and rear idlers 101 upward.
Thereby, when traveling on an uneven road surface, when the crawler type traveling device 18 gets over the protrusion, the crawler belt 15 receives a pressing force from the road surface and bends upward between the front and rear idlers 101. You can get over the protrusion smoothly.

Further, in the crawler type traveling device 18 of the present embodiment, on the lower rear side of the front idler 100 and the lower front side of the rear idler 101, from the inner peripheral surface side of the portion between the front and rear idlers 101 of the crawler belt 15, A foreign object biting prevention member 132 is provided between the idler and the crawler belt 15 to prevent foreign substances such as stones from being caught and removed from the wheel (the crawler belt 15 is detached).
The foreign matter biting prevention member 132 is formed of a plate material that is arranged so that the plate thickness direction coincides with the left-right direction, and is provided with a pair of left and right sides on the front side and the rear side. It is disposed on both the left and right sides of the drive protrusion 103.

Accordingly, the front foreign matter biting prevention member 132 is located on the rear side of each wheel portion 100A of the front idler 100, and the rear foreign matter biting prevention member 132 is located on the front side of each wheel portion 101A of the rear idler 101. The upper portion of the front foreign matter biting prevention member 132 is fixed to the front plate 112 and the front support bracket 109 by welding or the like, and the upper portion of the rear foreign matter biting prevention member 132 is welded to the rear support bracket 110 or the like. It is fixed by.
The front left and right foreign object biting prevention members 132 are connected by a reinforcing plate 133, and the rear left and right foreign object biting prevention members 132 are connected by a rear end side of the bottom plate 118 formed to be narrow. In addition, a gap that allows the crawler belt 15 to bend upward between the front and rear idlers 101 is provided between the lower surface 132 a of the front and rear foreign matter biting prevention member 132 and the inner peripheral surface of the crawler belt 15. In addition, the lower surface 132a of the front and rear foreign matter biting prevention member 132 is inclined so as to move upward as it goes to the center in the left-right direction of the crawler type traveling device 18 (the center in the left-right direction between the front and rear idlers 101). The crawler belt 15 is allowed to bend upward between the front and rear idlers 101, while the front end side and the rear side difference of the front foreign matter biting prevention member 132 are allowed. The rear end side of the object biting prevention member 132 is brought close to the inner peripheral surface of the crawler belt 15.

Further, the front surfaces of the front foreign matter biting prevention member 132 and the rear surface of the rear foreign matter biting prevention member 132 can be brought close to the wheel portions 100A and 101A of the idlers 100 and 101, respectively. The foil portions 100A and 101A are formed in an arc shape along the outer peripheral surface.
The foreign matter biting prevention member 132 has a function of restricting the excessive bending when the crawler belt 15 is bent upward (overly) between the front and rear idlers 101 and 101 by a predetermined amount or more. Accordingly, when the crawler belt 15 is twisted by turning or riding on a protrusion, it is possible to prevent the crawler belt 15 from coming off due to excessive bending of the crawler belt 15.

It should be noted that there is no problem in bending when the embankment 131 gets over when traveling on the uneven road surface of the intercostal groove M.
In addition, the front and rear foreign matter biting prevention members 132 are provided in a pair on the left and right sides so as to sandwich the drive protrusion 103, and thus have a function as a regulation guide when the crawler belt 15 is twisted and removed.
Further, in the crawler type traveling device 18 having the above-described configuration, when traveling forward, a force is applied to the crawler type traveling device 18 so that the front idler 100 side is lifted by the reaction force from the ground. The ground load increases, and the rear idler 101 side tends to sink in a soft field.

Therefore, in the transplanter 1 of the present embodiment, the urging means 134 that urges the oscillating frame 102 in the direction of oscillating forward is provided.
The urging means 134 includes a rotation shaft 135 that is supported on the front side of the transmission case 19 so as to be rotatable about a left-right axis, and one end side thereof is orthogonal to the axis of the rotation shaft 135. The other end is inserted in the direction in which the rod is pivoted, and the rod 136 is pivotally connected to the swing frame 102 below the drive shaft 87, and the swing frame 102 is biased in the forward swing direction. A coil spring 137 fitted to the rod 136 is provided between the rotating shaft 135 and the other end side of the rod 136.

The rotation shaft 135 is inserted into the left and right side surfaces of the transmission case 19 through a pair of left and right brackets 138 fixed in a downward projecting manner, and is rotatably supported by the brackets 138.
The other end of the rod 136 is pivotally connected to an extending portion 123a provided on the outer swing arm 123 of the outer swing bracket 107 via a pivot shaft 139 so as to be rotatable about a horizontal axis. Yes.
One end of the coil spring 137 is in contact with the rotating shaft 135 via the spring receiver 140, and the other end is in contact with the spring receiver 141 fitted between the rotating shaft 135 and the pivot shaft 139 with the rod 136. In addition, the spring receiver 141 is positioned by a positioning pin 142 (positioning member) inserted through the rod 136.

Therefore, when the rod 136 presses the outer swing bracket 107 to the rear side below the drive shaft 87 by the biasing force of the coil spring 137, the swing frame 102 is biased in the forward swinging direction. The ground pressures of the front and rear idlers 100 and 101 are made substantially equal.
By forming a plurality of holes through which the position 142 of the positioning pin is inserted in the axial direction of the rod 136 so that the position of the positioning pin 142 in the axial direction of the rod 136 can be changed, the biasing force of the coil spring 137 is reduced. Can be adjusted.

Further, the other end side of the rod 136 may be positioned by another positioning member that can change its position in the longitudinal direction of the rod 136.
Further, a stopper 143 is provided on one end side of the rod 136 so as to restrict rotation of the swing frame 102 relative to the transmission case 19 by coming into contact with the rotation shaft 135.
The stopper 143 includes a contact 145 made of a washer or the like externally fitted to a screw shaft 144 provided on one end of the rod 136, and a pair of nuts 146 screwed to the screw shaft 144 to fix the contact. ing.

As shown in FIG. 16, when the front side of the swing frame 102 of the crawler type traveling device 18 swings downward about the axis X of the drive shaft 87, the distance between the rotation shaft 135 and the pivot 139 increases. When the stopper 143 comes into contact with the rotation shaft 135, the downward swing of the swing frame 102 is restricted.
Therefore, when the traveling machine body 9 is raised, the stopper 143 comes into contact with the rotating shaft 135, and when the traveling machine body 9 is further raised to the uppermost position, the front idler is centered on the ground contact portion on the rear idler 101 side. The 100 side is configured to be lifted. Accordingly, when traveling on a paved road surface, straight traveling and turning can be performed smoothly.

Further, when the front side of the swing frame 102 swings upward about the axis X of the drive shaft 87, the distance between the rotation shaft 135 and the pivot 139 decreases, the coil spring 137 is compressed, and the coil spring 137 is When the compression limit is reached, the upward swing of the swing frame 102 is restricted.
When the transplanter 1 is in the working posture, the crawler traveling device 18 can swing up and down around the axis X of the drive shaft 87.
As shown in FIG. 17, the steering handle 7 is provided with a pair of left and right steering clutch levers 147.

The left and right steering clutch levers 147 are linked to the clutch arm 82 for operating the steering clutch 52 on the same side in the left-right direction via a clutch cable 148 and are also on the same side in the left-right direction. The brake arm 98 for operating 91 is linked and connected via a brake cable 149.
The clutch cable 148 and the brake cable 149 are configured by Bowden cables having an inner cable and an outer cable. One end of each of the cables 148 and 149 is connected to the steering clutch lever 147, The other end side of the inner cable is connected to the distal end side of the clutch arm 82, and the other end side of the inner cable of the brake cable 149 is interlocked to the distal end side of the brake arm 98 via the interlocking arm 150 and the spring 151. .

The interlocking arm 150 is formed in a bell crank shape, and the other end side of the inner cable of the brake cable 149 is connected to one end side.
A midway portion of the interlock arm 150 is pivotally supported by a rotation support shaft 153 provided on a bracket 152 fixed to the front end side of the transmission case 19, and one end side of the spring 151 is hooked to the other end side of the interlock arm 150. The other end side of the spring 151 is hooked on the tip end side of the brake arm 98.
Therefore, by grasping the steering clutch lever 147 and swinging it around the swing support shaft 210 from the position indicated by the solid line, the steering clutch 52 on the same side in the left-right direction as the operated steering clutch lever 147 is moved. The steering brake 91 on the same side in the left-right direction as the steering clutch lever 147 operated is effective (the crawler traveling device 18 is braked).

Further, in this embodiment, when the steering clutch lever 147 is swung from the position indicated by the solid line to the position indicated by the alternate long and short dash line, the steering clutch 52 is disengaged and the steering brake 91 starts to operate, and the steering clutch lever The steering brake 91 is effective when 147 is set to a position indicated by a two-dot chain line, and the steering brake 91 brakes the crawler traveling device 18 after the steering clutch 52 is disconnected.
The delay in the effectiveness of the steering brake 91 with respect to the disconnection of the steering clutch 52 is realized by the difference between the movement amount of the inner cable of the clutch cable 148 and the movement amount of the inner cable of the brake cable 149, the extension of the spring 151, and the like. Can be made.

  In the transplanter 1 configured as described above, when turning on a headland or the like in a farm field, the traveling machine body 9 is raised to the extent that the front side of the crawler traveling device 18 does not float, and the steering handle 7 is pushed down so that only the front wheel 14 is moved. From the ground (with the front idler 100 side of the crawler type traveling device 18 not floating from the ground), the steering clutch 52 on the side to be turned is operated to disengage the steering clutch 52 and the steering brake 91 is applied. Even if the transplanting machine 1 adopts the crawler type traveling device 18 instead of the rear wheel of the transplanting machine 1, the transplanting machine 1 is turned slightly (small) with a light handle operation load that pushes down the front wheel 14. Can be swiveled (with a turning radius).

The front idler 100 side of the crawler type traveling device 18 is lifted from the ground with the traveling body 9 in the highest position, and the steering wheel 7 is pushed down to lift the front wheel 14 from the ground around the ground point on the rear idler 101 side. It is also possible to turn in the state.
A steering brake 91 may be provided on the rear end side of the transmission case 19 to brake the drive shaft 87. However, if this is done, the spring 151, the interlocking arm 150, the brake cable 149, etc. are likely to get mud, and the steering Although the operation of the direction brake 91 may be hindered, this problem can be solved by providing the steering brake 91 on the front end side of the transmission case 19.

The transplanting device 4 includes a seedling placing table 156 for placing and supporting a seedling tray, a seedling extracting device 157 for extracting the seedling 2 from the seedling tray on the seedling placing table 156, and a seedling supplied from the seedling extracting device 157. A planting body 158 for planting 2 on the heel R, a pressure-reducing wheel 159 (covering ring) for suppressing the left and right sides of the seedling 2 planted on the heel R, and a planting hole in a multi-film laid on the field A perforated body 160 and a leveling roller 161 (detection roller) that rolls on the upper surface of the ridge R on the front side of the perforated body 160 are provided.
The seedling tray is made of plastic and is thin, flexible, and has a large number of pot parts arranged in a grid pattern at a predetermined pitch in the vertical and horizontal directions. The opening edge of each pot part is a flat plate. Are connected to each other by thin wall portions.

In this seedling tray, soil block seedlings 2 cultivated by seeding on the floor soil supplied to each pot portion are grown.
The seedling platform 156 is located on the front side of the steering handle 7, and is provided in an inclined shape that moves downward as it goes forward, and the bottom of the seedling tray is placed thereon to support the seedling tray. It has a mounting plate and is supported by the support frame 5 so as to be movable in the left-right direction.
The seedling table 156 can be intermittently reciprocated in the horizontal direction by one pitch in the horizontal direction of the pot portion of the seedling tray by the horizontal feeding mechanism, and the seedling table 156 has a horizontal direction. A vertical feed mechanism that vertically feeds the seedling tray by one pitch in the vertical direction of the pot portion is provided at the left and right ends of the moving area.

The seedling extraction device 157 includes a seedling extraction claw 162 for extracting the seedling 2 from the pot portion, and is driven by the power from the driven gear 74B of the planting power extraction gear train 74 in the mission case 12 to be seedling extraction claw 162. The seedling extraction claw 162 is advanced from the front side with respect to the floor soil in the pot portion, and the floor soil is stabbed and stabbed, and then the seedling extraction claw 162 is moved backward to retract the seedling 2 from the pot portion. It can be taken out.
In addition, the seedling 2 taken out from the pot portion is transported above the planting body 158 located at the seedling receiving position and can be released to the planting body 158.

The planting body 158 has an open upper end so that the seedling 2 can be supplied from the upper side, and a lower part can be opened and closed so that the seedling 2 can be held inside and the seedling 2 can be discharged downward.
As shown in FIG. 18, the planting body 158 is supported by a lifting mechanism 164 supported by the planting frame 163 so that the planting frame 163 can freely move up and down. It is supported so that it can rotate freely and can swing up and down.
The transmission case 165 is provided with a power take-out shaft 165 concentrically with the pivot shaft at the front end of the planting frame 163, and the driven side gear 74 </ b> B of the planting power take-out gear train 74 is provided on the power take-out shaft 165. Power is transmitted from the power take-out shaft 165 to the lifting mechanism 164 via a chain winding transmission mechanism in a transmission case 166 provided on the planting frame 163, and the lifting mechanism 164 is transmitted. Is driven.

The planting body 158 is supplied with the seedling 2 from the seedling picking device 157 in a closed state at the top dead center at or near the top dead center of the vertical movement range, descends while holding the seedling 2 inside, and moves up and down. By entering and opening the heel R on the bottom dead center side, a planting hole is formed in the heel R and the seedling 2 is discharged into the planting hole. Thereby, the seedling 2 is planted in the cocoon R.
A pair of left and right pressure wheels 159 are provided on the rear side of the planting body 158, rolls on both the left and right sides of the planting position of the seedling 2 on the upper surface of the heel R, and is put into a planting hole formed by the planting body 158. Press the soil on the left and right sides of the seedling 2.

The pressure wheel 159 is supported on the rear side of the planting frame 163 via a support mechanism 167, and the pressure wheel 159 supports the rear side of the planting frame 163. By changing the distance in the vertical direction from the frame 163, the planting depth can be changed.
The leveling roller 161 rolls the upper surface of the ridge R on the front side of the planting body 158 and the punched body 160 to level the ridge R and detects the height of the ridge R.
The front end of the transmission case 12 is supported on a lower end side of the transmission case 12 via a support shaft 169 so as to be rotatable around a horizontal axis, and the rear side of the transmission case 12 swings up and down around the axis of the support shaft 169. A swing arm 170 is provided, and a ground leveling roller 161 is rotatable on the rear side of the swing arm 17 via a rotation support shaft 171 that rotates integrally with the leveling roller 161. And follows the upper surface of the ridge R to roll on the upper surface of the ridge R.

The movement in the vertical direction of the leveling roller 161 with respect to the transmission case 12 is transmitted to the lifting valve 174 provided on the upper surface side of the transmission case 12 by the first and second sensor arms 172 and 173 that swing together with the swing arm 170. By controlling the elevating cylinder 44 by the elevating valve 174, the traveling machine body 9 is controlled to elevate so that the distance from the upper surface of the eaves R is kept constant, whereby the planting frame 163 is adjusted to the eaves R height. It is configured such that the seedling 2 is planted at a planting depth set by following up and down.
On the other hand, the vertical movement of the pressure wheel 159 relative to the mission case 12 is transmitted from the planting frame 163 to the lift valve 174 via the interlocking mechanism 175, and the distance from the upper surface of the heel R is also constant by the movement of the pressure wheel 159. Although it is configured so that the traveling machine body 9 can be lifted and lowered so as to be maintained, the movement of the pressure reducing wheel 159 is not transmitted to the lift valve 174 when the leveling roller 161 detects the height of the heel R. It has become.

  When starting planting the seedling 2 on the heel R, for example, when the leveling roller 161 is lifted by the heel R, this movement is transmitted to the lift valve 174 and the traveling machine body 9 is lifted, and when the lift valve 174 becomes neutral, the vehicle travels. The rising of the body 9 is stopped, and the traveling body 9 is set to the set height. At this time, the planting frame 163 is supported on the support frame 5 side (the traveling machine body 9 side) and rises together with the traveling machine body 9 to maintain a predetermined planting depth. Thereafter, when the traveling body 9 is advanced and the planting frame 163 is supported by the pressure wheel 159, the planting depth is set by the pressure wheel 159.

Further, since the leveling roller 161 is detached from the heel R at the end of the heel R, when the planting is finished, the traveling body 9 is controlled to move up and down by following the height of the heel R by the pressure reducing wheel 159.
That is, when the leveling roller 161 is removed from the ridge R, the traveling machine body 9 is lowered, but the planting frame 163 is supported by the pressure reducing wheel 159. Therefore, when the traveling machine body 9 is slightly lowered, the planting frame 163 and the lift valve The elevating valve 174 is switched to the neutral position by the interlocking mechanism 175 for interlocking with 174, and the traveling machine body 9 is held at the height set by the pressure reducing wheel 159.

Thus, the planted body 158 is planted at a predetermined planting depth from one end to the other end of the ridge R.
The swing arm 170 that supports the leveling roller 161 is provided with a second inter-stock sensor 176 that detects the number of rotations of the leveling roller 161.
The second stock-to-stock sensor 176 is constituted by a rotation pulse sensor, and measures (detects) the number of rotations of the rotation support shaft 171 that supports the leveling roller 161 to generate a pulse.
For example, a magnetoresistive element type rotation sensor similar to the first inter-strain sensor 69 is adopted as the second inter-strain sensor 176. For example, the unevenness of the sprocket-shaped or gear-shaped detection member that rotates integrally with the rotation support shaft 171 is employed. The non-contact sensor counts.

  In the transplanter 1 configured as described above, during the planting operation, the inter-clutch clutch 68 is disconnected by a clutch disconnection command signal from the controller 168 and then connected by a clutch connection command signal from the controller 168 ( The inter-clutch 68 is disengaged for a required time by a command signal from the controller 168), and the planting operation of the planted body 158 is stopped for the required time by disconnecting the inter-clutch clutch 68 for the required time. It is configured so that the seedling 2 can be planted at a desired planting interval (between plants) by stopping the planting operation for a required time (in addition, planting operation continuously without stopping the planting body 158 operation) In some cases).

When it is detected by a position detection sensor (not shown) that the planted body 158 has reached top dead center (or a position near the top dead center), a clutch disengagement command signal is transmitted from the controller 168 to the inter-stock clutch 68.
Further, the clutch connection command signal transmitted from the controller 168 is transmitted based on a pulse generated from either the first stock sensor 69 or the second stock sensor 176. In the present embodiment, basically, the second stock A clutch connection command signal is transmitted with priority given to the pulse of the sensor 176.

That is, when the rotation of the leveling roller 161 is not a predetermined rotation number (when the rotation is not stable or not rotating), the cutting time of the inter-clutch clutch 68 is controlled by the number of pulses of the first inter-cell sensor 69 ( If the rotation of the leveling roller 161 is a stable predetermined rotation number, the cutting time of the inter-clutch clutch 68 is controlled (the planting interval is controlled) by the number of pulses of the second inter-plant sensor 176. Is set by the controller 168.
Pulses generated from the first stock sensor 69 and the second stock sensor 176 are input to the controller 168, and the controller 168 determines whether or not the leveling roller 161 has a stable predetermined rotational speed by the controller 168. The number of pulses per unit time transmitted by the second inter-clutch clutch is determined (judged) based on whether or not the number of pulses per unit time is greater than or equal to a predetermined value (whether or not the rotation number is greater than or equal to a predetermined value). (When the rotation speed of the leveling roller 161 is greater than or equal to a predetermined value), it is determined that the leveling roller 161 is normally rolling on the top surface of the ridge R, and the stock control is performed at the rotation speed of the leveling roller 161. (The disengagement time of the inter-clutch clutch 68 is controlled based on the pulse of the second inter-organization sensor 176). If the rotational speed of 61 is less than a predetermined value), it is determined that the rotation of the leveling roller 161 is stopped or unstable, and the inter-stock control is performed based on the rotational speed of the second shaft 55 (of the first inter-stock sensor 69). The cutting time of the inter-clutch clutch 68 is controlled based on the pulse).

The number of pulses input from the first stock sensor 69 and the second stock sensor 176 to the controller 168 is counted by the controller 168. When the counted number of pulses reaches a preset number of pulses, A clutch connection command signal for switching the clutch 68 from OFF to ON is transmitted to the stock-to-stock clutch 68.
Thereby, the seedlings 2 are planted at the set planting interval, and the planting time is changed by changing the number of pulses from the first inter-strain sensor 69 or the second inter-strain sensor 176 to change the cutting time of the inter-strain clutch 68. The interval can be adjusted.

In addition, when the leveling roller 161 rolls on a horizontal plane and the traveling body 3 travels on a horizontal road surface, the first stock sensor and the second stock sensor when the leveling roller 161 and the traveling body 3 move the same distance are The number of pulses generated is set to be the same number of pulses. Therefore, the number of pulses of either the first inter-strain sensor 69 or the second inter-strain sensor 176 is theoretically (usually) between the same strains. 2 can be planted.
When the intercostal groove M is an uneven road surface, such as when there is a fill 131 in the intercostal groove M, the horizontal movement distance of the transplanting machine 1 and the propulsion mechanism of the traveling body 3 when the transplanter 1 travels in the intercostal groove M in the uneven state. 10 is over the embankment, the path is different, so if the rotation speed of the second shaft 55 that is the transmission shaft of the power transmission path of the traveling system is detected to control the disconnection time of the stock clutch 68, Although variation occurs between the stocks, since the leveling roller 161 rolls on the upper surface of the ridge R, basically, the stock level can be accurately controlled by controlling the stock level by the rotational speed of the leveling roller 161.

Further, since the ridge R is formed by moving the ridge forming machine from one end side to the other end side, the shape of the upper surface of the ridge R on the molding end side may be disturbed. In such a case, the leveling roller 161 may slip and not rotate normally, and the seedling 2 may not be planted normally.
In addition, at the end of the ridge R (the end side of the planting work at one ridge), the leveling roller 161 is detached from the ridge R, and therefore, when the setting is made such that the rotation speed of the leveling roller 161 is detected to control the stock. At the end of 畝 R, planting work cannot be performed, and there is a problem that hand planting must be done.

Further, before the planting operation is performed, in order to position the first end of the seedling 2 in the first horizontal row of the seedling tray at the seedling extraction position, the transplanting device 4 (the seedling mount 156, the seedling extraction claw 162, the planting body 158, etc.) (in this case, the seedling tray is fed forward), but in this case, the shift gear 63 is set to the neutral position and the transplanting device 4 is moved without running. If the number is detected and the seedling 2 is planted, the leveling roller 161 does not rotate, so that the seedling tray cannot be fed in an empty manner.
Also, in the part between the one end side and the other end side of the ridge R, the leveling roller does not rotate for some reason (for example, when the rotating part of the leveling roller is clogged with mud) or the rotation resistance slips greatly and is normal. Even in the case where the seedling 2 is not rotated, if the rotation speed of the leveling roller 161 is detected and the seedling 2 is planted, normal planting work cannot be performed.

Therefore, in the present embodiment, it is assumed that the leveling roller 161 does not rotate or does not rotate normally. In this case, the rotation speed of the second shaft 55 that is the transmission shaft of the traveling system is detected to control between the stocks. Like to do.
As described above, the planting work on most of the ridges R detects the number of rotations of the leveling rollers 161 and controls the inter-clutch clutch 68, so that even if the ridge grooves M are uneven road surfaces, they are not affected. The planting work can be carried out at a precise planting interval (when planting work is carried out while running on an uneven road surface, the planting interval can be prevented from changing greatly). When planting work cannot be performed, the rotation speed of the second shaft 55, which is the transmission shaft of the traveling system, is detected and the stock clutch 68 is controlled, so even if the rotation speed of the leveling roller 161 is not stable Can be planted.

As shown in FIGS. 19 to 21, the perforated body 160 is supported by the planting frame 163 via an elevating mechanism 177 so as to be movable up and down, and is disposed on the rear side of the leveling roller 161 and on the front side of the planting body 158. When it descends, the planting hole for planting the seedling 2 (to make the planted body 158 rush into the ridge R) by melting the multifilm by the action of heat by bringing it into contact with the multifilm Form into a multi-film.
The planting body 158 is inserted into the ridge R through the planting hole drilled in the multi-film.

The lifting mechanism 177 has a mounting plate 178 with a perforated body 160 attached to the lower part, a pair of upper and lower heater arms 179 that support the mounting plate 178 so as to be movable up and down, and power for driving the lifting mechanism 177 of the planting body 158. And a cam roller 181 that is attached to the upper heater arm 179 and rolls on the outer periphery of the heater cam 180. When the cam roller 181 falls into the recessed portion 182 of the heater cam 180, the attachment plate The perforated body 160 is configured to move down together with 178.
Note that after the perforated body 160 forms a planting hole in the multi-film, the cam roller 181 is detached from the recessed portion 182 of the heater cam 180 and the perforated body 160 rises together with the mounting plate 178, and the cam roller 181 is recessed in the heater cam 180. By rolling the part other than 182, the perforated body 160 is held at the standby position on the top dead center side.

The perforated body 160 is attached to the attachment plate 178 by a heater metal fitting 183, and the heater metal fitting 183 has a perforated body support wall 184 to which the perforated body 160 is attached and an attachment wall 185 attached to the attachment plate 178.
The mounting wall 185 is attached to the lower end side of the mounting plate 178 via a pivot 186 so as to be pivotable around the axis in the left-right direction, so that the perforated body 160 can swing back and forth, and the spring 187 swings forward. The posture of the perforated body 160 is held by a pin 189 fixed to the side of the mounting plate 178 inserted into the long hole 188 formed in the mounting wall 185 of the heater metal fitting 183 while being biased in the moving direction. The body 160 can swing rearward against the urging force of the spring 187.

The perforated body 160 includes a heater block 191 that contacts the multi-film, a spacer 192 interposed between the heater block 191 and the perforated body support wall 184, and the spacer 192 and the heater block 191 connected to the perforated body support wall 184. A plurality of mounting bolts 193 for attaching to the heater block, a plurality of glow plugs 194 (heater, heating means) for heating the heater block 191, and a heat dissipation suppression cover 195 (heat dissipation suppression means) for suppressing the heat dissipation of the heater block 191. Have
The heater block 191 is made of metal and is positioned below the perforated body support wall 184. The spacer 192 is formed in a cylindrical shape having a vertical axis by a heat insulating material such as ceramic, and the mounting bolt 193 is attached to the perforated body support wall 184. In addition, the spacer 192 and the heater block 191 are attached and fixed to the perforated body support wall 184 by passing through the spacer 192 and screwing into the screw holes formed in the heater block 191.

The perforated body support wall 184 is formed with a screw hole 198 into which the heat generating portion 196 of the glow plug 194 can be inserted and into which the screw portion 197 of the glow plug 194 can be screwed, and the spacer 192 has the glow plug 194. An insertion hole 199 for inserting the heat generating portion 196 is formed through in the vertical direction.
The heater block 191 includes a cylindrical columnar part 200 having a vertically middle part and an upper part (most part on the upper side) having a vertical axis, and a lower part projecting radially outward from the cylindrical part 200. A perforated portion 201 is provided.

The cylindrical portion 200 of the heater block 191 is formed with an insertion hole 202 having an open top and a bottom where the heat generating portion 196 of the glow plug 194 is inserted.
The heat generating portion 196 of the glow plug 194 is inserted into the insertion hole 202 of the cylindrical portion 200 of the heater block 191 through the screw hole 198 of the perforated body support wall 184 and the insertion hole 199 of the spacer 192, and the glow plug 194 Thus, the heater block 191 is heated.
In the present embodiment, three glow plugs 194 are provided, and these glow plugs 194 are connected by a connection plate 203.

The heat dissipation suppression cover 195 is formed in a cylindrical shape by a heat insulating material such as ceramic, and has an outer diameter that is substantially the same as the outer diameter of the spacer 192 and an inner diameter that is substantially the same as the outer diameter of the column portion 200 of the heater block 191. It is formed to have the same diameter, and the dimension in the axial direction is substantially the same as the dimension in the axial direction of the cylindrical portion 200 of the heater block 191, and is externally fitted to the cylindrical portion 200 of the heater block 191.
The heat dissipation suppression cover 195 significantly suppresses the heat dissipation of the heater block 191, and the temperature of the heater block 191 can be ensured without significantly reducing the heater performance due to the temperature or wind.

FIG. 22 shows a perforated body 160 provided with a heat radiation suppression cover 195 of another form.
In the heater block 191 in FIG. 22, the cylindrical portion 200 and the perforated portion 201 are formed to have the same diameter as the outer diameter of the spacer 192.
The heat dissipation suppression cover 195 has an upper wall 204 and a cylindrical wall 205 that covers the outer periphery of the heater block 191. The upper wall 204 is interposed between the spacer 192 and the heater block 191 and fixed. The wall 205 covers the outer peripheral surface of the heater block 191 so that a gap is left between the wall 205 and the outer peripheral surface of the heater block 191.

  Note that the heat dissipation suppression means for suppressing the heat dissipation of the heater block 191 may be constituted by a windshield cover that covers the front and rear and the left and right of the vertically moving range of the perforated body 160.

It is a whole side view of a transplant machine. It is a top view of a traveling body. It is a side view of a traveling body. It is a rear surface sectional view of a traveling body. It is a back sectional view of a mission case. It is a rear view of a traveling clutch. It is a back sectional view showing a power transmission system of a crawler type traveling device. It is a side view of a steering brake. It is a side schematic diagram of a crawler type traveling device. It is side surface sectional drawing of a crawler type traveling apparatus. It is a back sectional view of a crawler type traveling device. It is a plane sectional view of a swing frame. It is a plane sectional view of a crawler type traveling device. (A) is a front sectional view of the lower part of the crawler type traveling device, (b) is a rear sectional view of the lower part of the crawler type traveling device, and (c) is a partial rear sectional view of the rod support portion of the urging means. It is a side view which shows a state when a crawler type traveling apparatus gets over a bank. It is a side view which shows the state which moved the traveling body up and down. It is the schematic which shows the interlocking relationship of a steering clutch lever, a steering clutch, and a steering brake. It is a side schematic diagram showing a planting mechanism. It is a side view of a punching device. It is a top view of a punching device. It is side surface sectional drawing of a punching body. It is side surface sectional drawing of the punching body of another form.

Explanation of symbols

2 seedling 3 traveling body 4 transplanting device 7 steering handle 9 traveling body 11 engine 14 front wheel 15 crawler belt 18 crawler type traveling device 19 transmission case 52 steering clutch 82 clutch arm 83 input shaft 87 drive shaft 91 steering brake 98 brake arm 99 Driving wheel 100 Front idler 101 Rear idler 147 Steering clutch lever 148 Clutch cable 149 Brake cable R 畝 M 畝 Groove

Claims (4)

A walking type transplanter equipped with a traveling body (3) that travels across the heel (R), a transplant device (4) for planting a seedling (2) on the heel (R), and a steering handle (7). There,
The traveling body (3) is a crawler that travels on the left and right sides of the traveling machine body (9) on which the engine (11) is mounted, one end side is supported by the traveling body (9), and the other end side travels through the intercostal groove (M). A power transmission case (19) provided with a traveling device (18) and a front wheel (14) located on the front side of the crawler traveling device (18), and the power from the engine (11) is branched in the middle. It is transmitted to the input shaft (83) provided at one end side of the left and right transmission cases (19) and from the input shaft (83) to the other of the transmission case (19) via the power transmission mechanism in the transmission case (19). The left and right crawler type traveling devices (18) are transmitted to a drive shaft (87) provided on the end side, and a drive wheel (99) that rotates integrally with the drive shaft (87) and a lower portion of the drive wheel (99). Front and rear idlers (100, 101) And endless belt-like crawler belts (15) wound around the drive wheels (99) and the front and rear idlers (100, 101). Each of the left and right input shafts (83) has a steering clutch (52). ) Through which the power from the engine (11) is transmitted intermittently and a steering brake (91) for braking the input shaft (83) is provided at one end of each of the left and right transmission cases (19). Features transplanter.   2. The transplanter according to claim 1, wherein the steering brake (91) on the same side in the left-right direction performs a braking operation in conjunction with the disconnection operation of the steering clutch (52). .   3. The transplanter according to claim 2, wherein the steering brake (91) is configured to brake the input shaft (83) after the steering clutch (52) is disconnected.   The steering handle (7) is provided with a pair of left and right steering clutch levers (147), and each of the left and right steering clutch levers (147) is a clutch for intermittently operating the steering clutch (52) on the same side in the left-right direction. The brake cable (149) is connected to the brake arm (98) that is linked to the arm (82) via the clutch cable (148) and brakes the steering brake (91) on the same side in the left-right direction. The steering clutch (52) and the steering brake (91) on the same side in the left-right direction are operated by operating the steering clutch lever (147). The transplanter according to claim 3.

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