JP4526491B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter provided with a horizontal control mechanism for moving the left and right wheels relatively up and down so that the left and right sides of a traveling machine body are horizontal.

  In the transplanter, the traveling machine body is supported by the left and right wheels so that it can be raised and lowered. When the lifting lever is operated to the lower side, the left and right wheels are raised to lower the traveling machine body, and the lifting lever is operated to the upper side. The left and right wheels are lowered to raise the traveling machine body, and a horizontal control mechanism is provided for moving the left and right wheels up and down so that the left and right sides of the traveling machine body are horizontal. A lock lever is provided to lock the horizontal control mechanism so that the horizontal control mechanism cannot be controlled, and the lock lever is movable between a lock position where the horizontal control mechanism is locked so that the horizontal control mechanism cannot be controlled and a lock release position where the horizontal control mechanism allows the horizontal control. (For example, Patent Document 1).

  In this type of transplanter, when performing planting work on an inclined land, the horizontal control mechanism of the traveling machine body may be locked in a state where the traveling machine body is in a horizontal posture in the left-right direction. In this case, when turning at the end of the heel R, the traveling machine body is raised and, in order to prevent the traveling machine body from excessively tilting to the left and right, turning after unlocking the horizontal control mechanism, Thereafter, the lock lever is operated to the lock position to lock the horizontal control mechanism again and lower the traveling machine body to the planting position. However, the unlocking operation of the horizontal control is troublesome.

Therefore, in the conventional transplanter, the lift lever and the lock lever are interlocked and connected by a cable, and when the lift lever is moved upward, the lock lever is automatically switched from the locked position to the unlocked position ( For example, Patent Document 1).
JP 2005-269975 A

  However, in the conventional transplanter, in order to unlock the horizontal control mechanism in the middle of the planting operation in which the traveling aircraft is lowered, it is necessary to raise the traveling aircraft and interrupt the planting operation There was a problem that the horizontal control lock could not be easily released during the planting operation. Moreover, when the lock | rock of the horizontal control mechanism was cancelled | released in the middle of the planting operation | work, there was a possibility that the planting operation might be interrupted in the middle and the part which may not be planted might arise in the field.

  In view of the above-described problems, the present invention can be applied to the horizontal control even during the planting work in which the traveling machine body is lowered while the lock lever is automatically switched from the locked position to the unlocked position when the lifting lever is operated to the raised position. The mechanism can be easily unlocked, and even if the horizontal control mechanism is unlocked in the middle of planting, it prevents the planting operation from being interrupted and leaving no part of the field in the field. It is something that can be done.

The technical means of the present invention for solving this technical problem is that the traveling machine body is supported by the left and right wheels so as to be movable up and down, and the left and right wheels are raised when the lifting lever is operated to the lowering side. When the aircraft is lowered and the lifting lever is operated to the up side, the left and right wheels are lowered to raise the traveling aircraft, and the left and right wheels are relatively moved so that the left and right of the traveling aircraft are horizontal. A horizontal control mechanism for moving up and down is provided, a lock lever for locking the horizontal control mechanism so as not to be horizontally controlled is provided, and the lock lever locks the horizontal control mechanism so that it cannot be horizontally controlled. In a transplanter that is movable to an unlocking position that allows horizontal control,
An unlock lever for unlocking the lock lever is provided, and the unlock lever includes a lock position for locking the lock lever at the lock position, and a retracted position where the lock lever is unlocked to the lock position. A lock that urges the lock lever from the lock position A side to the lock release position side so that the lock lever moves to the lock release position B when the lock release lever is operated to the retracted position. A lever urging means is provided, and a release lever urging means for urging the unlocking lever from the retracted position side to the locking position side is provided. When the elevating lever is operated to the ascending side, The lock release lever is interlocked with the lift lever to move the lock release lever to the retracted position against the urging force of the release lever urging means.

  According to another technical means of the present invention, the lock lever is supported so as to be swingable around a first support shaft, and is swingable between the lock position and the unlock position. Is supported so as to be swingable about the second support shaft and can be swung from the locking position to the retracted position. When the lock release lever is swung to the retracted position, the lock lever biasing means is attached. The point is that the lock lever is configured to swing to the unlock position by the force.

  In addition, according to another technical means of the present invention, an engagement portion is provided on the lock lever, and the lock engagement lever is engaged with the lock release lever so as to hold the lock lever in the lock position. A locking portion and a second locking portion for locking the locking lever engaging portion to hold the locking lever in the unlocking position, and when the unlocking lever is operated to the retracted position, the locking lever is engaged. Is disengaged from the first locking portion, and the lock lever biasing means oscillates to the unlocking position, so that the engaging portion of the lock lever is engaged with the second locking portion of the unlocking lever. The point is that they are configured to match.

  Further, according to another technical means of the present invention, the elevating lever is supported so as to be swingable around the first support shaft, and can be operated to swing between the ascending side and the descending side. The lock release lever is connected to the lift lever via the connecting member so that the lock release lever moves to the retracted position in conjunction with the lift lever when operated to the ascending side.

  According to the present invention, when the elevating lever is operated to the raised position, the lock lever is automatically switched from the locked position to the unlocked position, and at the same time, by operating the lock released lever to the retracted position, the traveling vehicle body is lowered. Even during attachment work, the horizontal control mechanism can be easily unlocked. In addition, since it is not necessary to raise the traveling machine to unlock the horizontal control mechanism, even if the horizontal control mechanism is unlocked during the planting operation, the planting operation is interrupted in the middle of the planting operation. It is possible to prevent the occurrence of non-planted parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a transplanter 1 for transplanting seedlings of vegetables or the like to a ridge R. In the figure, the transplanter 1 is a walking type having a transplanter 3 and a steering handle 4 behind a traveling body 2, The soil block seedling is automatically planted at a predetermined interval on the ridge R while traveling in the longitudinal direction across R.

In addition, the advancing direction of the transplanter 1 is called the front-back direction, and the horizontal direction orthogonal to the advancing direction is called the left-right direction.
The traveling body 2 has a traveling machine body 8 mainly configured by mounting and fixing the mount 6 shown in FIG. 2 on the front portion of the transmission case 5 in a protruding manner and mounting an engine 7 and the like on the mount 6. The traveling machine body 8 is supported by a front wheel 10 and a rear wheel 11 provided on the left and right sides so as to be able to travel.

  The transplanting device 3 is provided on a transplanting frame 12 mounted on the rear side of the traveling machine body 8, a planting body 13 for planting seedlings on the heel R, and a seedling supply device 14 for supplying seedlings to the planting body 13. , Mainly composed of a soil cover to the root side of the planted seedling and a soil covering member (soil covering roller) 15 for suppressing the root portion, and when the ridge R is covered with a multi film, A drilling means for forming a planting hole is provided.

  The transplant frame 12 includes a fixed frame 12A having a front portion attached and fixed to the mission case 5, and a movable frame 12B having a front portion pivotally attached to the mission case 5 about the left and right axis 5A. The seedling supply device 14 is provided on the frame 12A, the steering handle 4 is attached to the rear end of the fixed frame 12A, and the planting body 13 and the soil covering member 15 are supported by the movable frame 12B.

  The planting body 13 is supported on the movable frame 12B side, and the planting body 13 swings back and forth while swinging up and down, so that the planting body 13 is vertically long with respect to the traveling body 2. It moves so as to draw a substantially elliptical orbit. Moreover, the planting body 13 is formed with a cylindrical body having an upper and lower opening at the top, and has an opener that can be opened and closed at the bottom. The planting body 13 is supplied with seedlings dropped at the upper end side of the track, and is lowered with the opener closed, and the lower part of the opener enters the ridge R on the lower side of the track. The planting hole is formed in the ridge R, and the seedling stored in the planting body 13 is dropped and released into the planting hole, whereby the seedling is planted in the ridge R.

The seedling supply device 14 is disposed on the front side of the seedling mounting base 25 and a seedling mounting base 25 that intermittently moves in the left-right direction so as to laterally feed a seedling tray provided with a large number of pot portions containing the soil block seedlings in the vertical and horizontal directions. And a seedling feeding device 26 that takes out the seedlings one by one from the seedling tray and transports them to the planting body 13.
In addition, the seedling placing stand 25 is provided with a vertical feed mechanism that vertically feeds the seedling tray by one pitch of the pot portion after the horizontal seedlings are taken out.

  As shown in FIGS. 1, 3 and 5, the soil covering member 15 is composed of a truncated cone-shaped roller, and a pair of right and left are disposed so as to sandwich the seedling planting portion on the rear side of the planting body 13. It rolls and moves on the upper surface of R, and the soil is pressed against the root side of the planted seedling from both the left and right sides to bring the soil together, and at the same time the strain is pressed down. The soil covering member 15 is rotatably supported by a rear portion of the soil covering frame 28 that is pivotally supported around a left and right axis 29 by a bracket 27 fixed to the rear portion of the movable frame 12B. The soil covering frame 28 is connected to the movable frame 12B via the planting depth adjusting mechanism 30, and the rear portion of the movable frame 12B is supported by the soil covering member 15. Therefore, the soil covering frame 28 is supported on the movable frame 12B so as to be swingable up and down, and the soil covering member 15 is rotatably supported on the free end side of the soil covering frame 28.

The planting depth adjusting mechanism 30 includes a planting depth adjusting lever 31 that can be swung around the left and right axes, a locking member 32 that locks the planting depth adjusting lever 31, and a planting depth. It is mainly composed of a connecting member (locking member for a grounding member height adjusting lever 101 described later) 33 for connecting the adjusting lever 31 and the covering frame 28.
The locking member 32 is formed of a plate material, and is disposed forwardly inclined below the grip portion 4A of the steering handle 4 (see FIG. 4), and is fixed to a bracket 35. The bracket 35 is a rear end of the movable frame 12B. It is fixed to an attachment member 34 that is attached and fixed to the portion, and is projected rearward and then extends upward.

As shown in FIG. 5, the locking member 32 is formed with a guide groove 36 that allows the planting depth adjustment lever 31 to swing, and the guide groove 36 has a planting depth adjustment lever 31. A plurality of locking portions 36 a that regulate the swinging are formed at intervals in the swinging direction of the planting depth adjustment lever 31.
The connecting member 33 is fitted around a cylindrical shaft 37 that passes through a middle portion of the left and right bracket 35 in the left-right direction and is fixed (or rotatably supported) thereto, and rotates around a support shaft 103 in the left-right direction described later. It is supported freely. The lower portion of the planting depth adjustment lever 31 is fixedly attached to the tube shaft 37 via a mounting plate 37 a by bolts and nuts, and the planting depth adjustment lever 31 can be swung around the support shaft 103. ing. In addition, the planting depth adjustment lever 31 is provided with a locked portion 31 a that fits into the locking portion 36 a of the guide groove 36.

  The planting depth adjusting lever 31 is urged by an urging means such as a spring so that the locked portion 31a is fitted into the locking portion 36a, and its swinging is restricted. By swinging the planting depth adjusting lever 31 by gripping the gripping portion of the planting depth adjusting lever 31 and tilting the locked portion 31a away from the locking portion 36a against the urging force. It is configured to be operable.

  On the other hand, the front lower end side of the connecting member 33 is pivotally supported via a left and right support shaft 39 on a bracket 38 that is externally fitted around and supported by the center portion of the rear portion of the cover frame 28 in the left and right direction. It is connected. Therefore, the planting depth adjustment lever 31 and the free end side of the covering soil frame 28 are connected via the locking member 33 (connection member 33), and the planting depth adjustment lever 31 swings around the support shaft 103. Thus, the soil covering frame 28 swings up and down.

  Therefore, by swinging the planting depth adjustment lever 31 downward, the covering member 15 is lifted with respect to the movable frame 12B, and the distance from the movable frame 12B is narrowed. Swinging upward, the cover member 15 is lowered with respect to the movable frame 12B, and the distance from the movable frame 12B is increased (therefore, the vertical swing position of the cover member 15 with respect to the movable frame 12B can be adjusted). As a result, the movable frame 12B swings up and down, and the depth of penetration of the planted body 13 into the ridge R, that is, the seedling planting depth can be changed.

In the illustrated example, the height of the movable frame 12B increases as the locking position of the planting depth adjusting lever 31 with respect to the locking portion 36a increases, and the planting depth decreases, and the planting depth decreases as it goes downward. It is like that.
As shown in FIGS. 2 and 6, a support cylinder 54 having a horizontal axis is fixed to the front portion of the gantry 6 of the traveling body 2, and a pair of left and right front wheel support shafts 55 are fixed to the support cylinder 54. The inner end side in the left-right direction is inserted so as to be rotatable around the left-right axis, and a mounting cylinder 56 is fitted on the outer end side in the left-right direction of each of the left and right front wheel support shafts 55.

The upper end side of the front wheel support arm 57 is connected and fixed to each of the left and right mounting cylinders 56, and the front wheel 10 is attached to the lower end side of each front wheel support arm 57 so as to be rotatable around the left and right axis via an axle.
The outer end side of the left and right front wheel support shaft 55 and the mounting cylinder 56 are formed in a hexagonal cross section so as to rotate integrally, and the left and right front wheels 10 swing up and down around the front wheel support shaft 55. It is supposed to be free.

The outer end side of the left and right front wheel support shaft 55 and the mounting cylinder 56 are fixed by pins passing through both, and there are a plurality of pin insertion holes formed on the outer end side of the left and right front wheel support shaft 55 in the axial direction. The left and right positions of the front wheel 10 can be adjusted (that is, the distance of the front wheel 10 can be adjusted).
The rotational power of the engine 7 is input to the transmission case 5 and linked to the rear wheel 11 provided under the transmission case 59 via a chain winding transmission mechanism in the transmission case 59. Is driven to rotate.

The left and right transmission cases 59 can be independently moved in two positions in the left-right direction, and the distance of the rear wheel 11 can be adjusted by moving the transmission case 59 left and right. It can cope with the difference (growth and narrow) of the ridge width between the ridge and the open-air high ridge.
A rolling shaft 61 arranged in the left-right direction is supported at the front-rear intermediate portion of the gantry 6 via a bearing body 62 so as to be rotatable around the left-right axis and to be movable back and forth. A lifting cylinder 63 made of a hydraulic cylinder is disposed in front and fixed to the gantry 6. The piston rod 63A of the elevating cylinder 63 is connected to the rolling shaft 61 via a cylindrical body or the like that is externally fitted to the shaft 61 so that the rolling shaft 61 can be moved forward and backward by the piston rod 63A. It can be moved.

The rolling shaft 61 can be fixed to the gantry 6 by fixing means.
As shown in FIGS. 2 and 6, brackets 64L and 64R are fixed to the left and right sides of the rolling shaft 61, and front connection brackets 65L and 65R are fixed to the left and right front wheel support shafts 55. The rear connection brackets 66L and 66R are fixed, the right bracket 64R protrudes downward, and the left bracket 64L and the front and rear connection brackets 65L, 65R, 66L, and 66R protrude upward. Yes.

The brackets 64L and 64R and the rear connection brackets 66L and 66R are connected by a connection link 67, and the front connection brackets 65L and 65R and the rear connection brackets 66L and 66R are connected by a connection rod 68.
Note that a pair of left and right connection portions of the brackets 64L and 64R and the front side connection brackets 65L and 65R are provided so that the left and right positions of the transmission case 59 can be adjusted.

  Then, by moving the piston rod 63A of the elevating cylinder 63 back and forth, the left and right connecting links 67 are pushed back and forth so that the transmission case 59 is relative to the traveling machine body 8 via the rear connecting brackets 66L and 66R. In addition, the connecting rod 68 is pushed back and forth, and the front wheel support arm 57 is moved relative to the traveling machine body 8 via the front connecting brackets 65L and 65R, the front wheel support shaft 55 and the mounting cylinder 56. The left and right front and rear wheels 10 and 11 are moved up and down relative to the traveling machine body 8 at the same time and the front and rear wheels 10 and 11 are grounded. The transplanter 3 can be moved up and down with respect to the heel R so as to follow the change in the height of the upper surface of the heel R.

  A rolling cylinder 69 made of a hydraulic cylinder is attached to the gantry 6 so as to move along with the rolling shaft 61. A piston rod 69 A of the rolling cylinder 69 is pivotally attached to a bracket 70 fixed to the rolling shaft 61. Therefore, by moving the piston rod 69A of the rolling cylinder 69 back and forth, the rolling shaft 61 rotates about the left and right axis, and the one right and left connection link 67 is pulled forward and the one right and left connection rod 68 moves forward. The left and right other connecting links 67 are pushed rearward and the left and right other connecting rods 68 are moved rearward, thereby maintaining the traveling machine body 8 and the transplanting device 3 in a horizontal state even on an inclined ground. Can be done. A pendulum (sensor) for detecting the inclination of the traveling machine body 8 with respect to the left and right direction (horizontal) is provided so as to be swingable to the left and right around the front and rear axes. The pendulum detects the inclination of the traveling machine body 8 with respect to the horizontal. Then, the rolling cylinder 69 is controlled (by a horizontal control valve 136 described later) so that the traveling machine body 8 is horizontal in the left-right direction (the horizontal control of the traveling machine body 8 in the left-right direction is enabled). ) Therefore, a horizontal control mechanism 130 (see FIG. 7) that relatively moves the left and right wheels 10 and 11 up and down so that the left and right sides of the traveling machine body 8 are horizontal includes a rolling cylinder 69, a pendulum, a horizontal control valve 136 described later, and the like. The rolling cylinder 69 is hydraulically operated to make the left and right sides of the traveling machine body 8 horizontal.

  As shown in FIGS. 1, 3, and 4, the rear surface of the transmission case 5 is located below the front side of the planting body 13, and the upper surface of the ridge R is rolled to detect the height change of the ridge R. In addition, a grounding member (leveling roller) 71 composed of a roller for suppressing the upper surface of the ridge R is disposed. On both the left and right sides of the grounding member 71 and the left and right sides of the transmission case 5, the swinging arms 72 are moved upward as they move forward. It is arranged in a forward inclined shape so as to shift to

  Further, the swing arm 72 is supported so as to be swingable around the left and right axes by a support shaft 73 that has a front portion passing through the swing arm 72 and screwed into the transmission case 5, and a pivot at the rear portion. A grounding member 71 is rotatably attached to the left and right axes via 74, and the rear ends of the left and right swing arms 72 are connected to each other by a connecting member 75. Therefore, when the grounding member 71 follows the height change of the top surface of the heel R, the swing arm 72 swings around the support shaft 73 and detects the height change of the heel R.

A locking arm portion 76 extending forward is integrally formed at the front portion of the left swing arm 72, and the left support shaft 73 is interlocked and connected to a lift control valve 77 that controls the lift cylinder 63. The interlocking member 78 is supported so as to be swingable relative to the swing arm 72 around the left and right axis.
Spring engaging portions 76a and 78a are provided at the front portions of the locking arm portion 76 and the interlocking member 78, respectively, and biasing means 79 made of a tension coil spring is interposed between the spring engaging portions 76a and 78a. The swing arm 72 and the grounding member 71 are biased in the grounding direction. Further, an attachment portion 81 is provided at the rear portion of the interlocking member 78 to attach the front end side of the outer cable 80A of the Bowden cable (regulating means) 80 so that the attachment in the length direction can be adjusted. Further, the front end side of the inner cable 80B of the Bowden cable 80 is inserted into the insertion hole formed in the locking portion 82 provided in the swing arm 72 so as to be movable in the longitudinal direction, and is inserted into the distal end portion of the inner cable 80B. By fixing the contact member 107 that does not pass through the hole, the inner cable 80B is locked to the locking portion 82, and the swinging arm 72 swings around the support shaft 73 by the biasing force of the biasing means 79. Is regulated.

The urging force of the urging means 79 does not extend due to the pressing force from the ground acting on the grounding member 71 during normal planting work, and therefore swings when the grounding member 71 follows the upper surface of the ridge R. The arm 72 and the interlocking member 78 are integrally swung around the support shaft 73.
An arc-shaped elongated hole 83 is formed in the front upper portion of the interlocking member 78, and a pin 84 is slidably fitted into the elongated hole 83. It is pivotally connected to one end.

  A middle portion of the lift valve arm 85 is supported by a body of the lift control valve 77 fixed to the upper portion of the transmission case 5 via a support shaft 86 so as to be rotatable about a horizontal axis. 4 is swingable in descending, neutral and ascending directions shown in FIG. 4, and an engaging groove 87 is formed on the other end side of the elevating valve arm 85. The engaging groove 87 is engaged with a pin 88 a provided on one end side of an operation lever 88 constituted by a bell crank, and a middle portion of the operation lever 88 is attached to a rotary spool 89 of the elevation control valve 77. ing.

  Therefore, when the grounding member 71 is lowered, the swinging arm 72 and the interlocking member 78 swing around the support shaft 73 in the clockwise direction in FIG. 1, and the lift valve arm 85 is rotated around the support shaft 86 in the counterclockwise direction in FIG. As a result, one end of the operation lever 88 is pulled up, and the rotary spool 89 of the lift control valve 77 is operated in a direction to lower the traveling machine body 8, and the piston rod 63A of the lift cylinder 63 operates in the retracting direction. The traveling machine body 8 is lowered until the rotary spool 89 returns to the neutral position.

  When the grounding member 71 is raised, the swing arm 72 and the interlocking member 78 are rotated in the counterclockwise direction in FIG. 1 around the support shaft 73, and the lift valve arm 85 is rotated in the clockwise direction in FIG. As a result, one end of the operation lever 88 is pulled down, and the rotary spool 89 of the control valve 81 is operated in a direction to raise the traveling machine body 8, and the piston rod 63A of the elevating cylinder 63 operates in the protruding direction. The traveling machine body 8 is raised until the rotary spool 89 returns to the neutral position.

The arc shape of the long hole 83 is an arc having a radius such that the swinging motion of the lifting / lowering valve arm 85 about the support shaft 86 is proportional to the swinging motion of the swinging arm 72 about the support shaft 73. Thus, the height change of the ridge R is accurately transmitted to the elevation control valve 77. The radius of the long hole 83 is determined by simulation by CAD or by calculation.
One end side of a sensitivity spring 90 made of a tension spring is hooked to the other end side of the operation lever 88, and the other end side of the sensitivity spring 90 is hooked to a hook member attached and fixed to the fixed frame 12A side. By changing the latching position of the sensitivity spring 90 to the latching member, the pressing force of the grounding member 71 against the upper surface of the heel R can be changed, and thereby the follower sensitivity of the grounding member 71 with respect to the upper surface of the heel R can be adjusted. It has become.

  As shown in FIGS. 3 and 4, the movable frame 12 </ b> B and the lift valve arm 85 are interlocked and connected by an interlocking mechanism 92. The interlocking mechanism 92 includes a bell crank 93 pivotally attached to the fixed frame 12A so as to be rotatable around the left and right axes, a link 94 that interlocks and connects one end of the bell crank 93 and the movable frame 12B, and a bell crank 93. The other end side and the interlocking rod 96 for interlockingly connecting the connecting plate 95 fixed to the lift valve arm 85, and the middle part of the interlocking rod 96 has a turnbuckle structure.

  The interlocking rod 96 and the connecting plate 95 are configured such that a pin 97 pivotally attached to the connecting plate 95 is slidable in the front-rear direction in a longitudinal hole 99 formed in a connected plate 98 fixed to the interlocking rod 96. It is interlocked and connected by fitting. As a result, even if the grounding member 71 moves up and down during the planting operation, the pin 97 slides relatively in the elongated hole 99, allowing the grounding member 71 to move up and down and the planting depth. Even if the movable frame 12B swings up and down during the adjustment, the lift control valve 77 is not affected. Further, when planting near the exit of the ridge R (the end in the planting direction), when the grounding member 71 is detached from the ridge R, the pin 97 is locked to the front end of the long hole 99. Thus, the grounding member 71 is suspended, and the soil covering member 15 serves as a detection roller for detecting the height of the upper surface of the basket R so as to control the elevation of the traveling machine body 8.

  As shown in FIGS. 1, 3, and 5, the ground member 71 can be adjusted in height relative to the mission case 5 by the vertical adjustment mechanism 100. This vertical adjustment mechanism 100 is mainly composed of a grounding member height adjusting lever 101 that can be swung around a left and right axis, a locking member 33 (the connecting member 33), and the Bowden cable 80. By swinging the member height adjusting lever 101, the relative height of the grounding member 71 with respect to the transmission case 5 (the traveling machine body 8) can be easily adjusted.

  Similar to the locking member 32, a guide groove 102 that allows the grounding member height adjustment lever 101 to swing is formed in the locking member 33 on the left side of the guide groove 36. A plurality of locking portions 102a for restricting the swing of the grounding member height adjusting lever 101 are formed at intervals in the swinging direction of the grounding member height adjusting lever 101, and the locking member 33 is configured by the grounding member height adjusting lever 101. 101 is guided around the support shaft 103, and the grounding member height adjusting lever 101 is locked and fixed at a plurality of positions around the support shaft 103.

  The grounding member height adjusting lever 101 is disposed on the left side of the planting depth adjusting lever 31 of the planting depth adjusting mechanism 30 and is fixed to the support shaft 103 that is inserted in the cylinder shaft 37 so as to be relatively rotatable. It is fixedly attached to the relay lever 104 and is supported so as to be swingable around the support shaft 103. Further, the grounding member height adjusting lever 101 is provided with a locked portion 101 a that fits into the locking portion 102 a of the guide groove 102.

  As with the planting depth adjustment lever 31, the grounding member height adjustment lever 101 is urged by an urging means such as a spring so that the locked portion 101a is engaged with the locking portion 102a. Oscillation is restricted, and the gripping portion of the grounding member height adjusting lever 101 is gripped and tilted so that the locked portion 101a is disengaged from the locking portion 102a against the urging force. The grounding member height adjusting lever 101 can be swung.

The rear end side of the outer cable 80A of the Bowden cable 80 is attached to the attachment member 34 and the like so that the position in the length direction can be adjusted, and the rear end side of the inner cable 80B is pivotally attached to the relay lever 104.
Therefore, the planting depth adjustment lever 31 and the grounding member height adjustment lever 101 are supported so as to be swingable around the same support shaft 103. The planting depth adjustment lever 101 is connected to the soil covering member 15, and the soil covering member 15 changes the relative height with respect to the movable frame 12 </ b> B by swinging around the support shaft 103 of the planting depth adjustment lever 31. The locking member 33 is supported by the planting depth adjustment lever 31 so as to swing around the support shaft 103 and swings around the support shaft 103 together with the planting depth adjustment lever 31. Thus, the grounding member height adjusting lever 101 to the swing arm 72 are interlocked and connected to the planting depth adjusting lever 31 via the locking member 33, and the soil covering member 15 by the planting depth adjusting lever 31 is connected. The ground contact member 71 changes the height relative to the traveling machine body 8 in conjunction with the change in the relative height with respect to the movable frame 12B. In the present embodiment, since the vertical swing range of the grounding member 71 is regulated to a predetermined width by the Bowden cable 80, the relative height of the soil covering member 15 relative to the movable frame 12B by the planting depth adjustment lever 31 is adjusted. In conjunction with the change, the upper limit height of the vertical swing range of the grounding member 71 is changed.

  Further, a grounding member height adjusting lever 101 for changing the height of the grounding member 71 relative to the traveling machine body 8 separately from the soil covering member 15 is provided, and the grounding member height adjusting lever 101 swings around the support shaft 103. Accordingly, the grounding member height adjusting lever 101 is connected to the swing arm 72 so that the swing arm 72 swings up and down. Therefore, by swinging the grounding member height adjusting lever 101 downward, the inner cable 80B is pulled, and the swing arm 72 moves around the support shaft 73 against the biasing force of the biasing means 79 as shown in FIG. The ground contact member 71 moves upward relative to the mission case 5. At this time, since the interlocking member 75 is interlocked and connected to the elevation control valve 77, the swing arm 72 swings relative to the interlocking member 75. When the grounding member 71 is in contact with the upper surface of the heel R, the rotary spool 89 of the lift control valve 77 is moved in the direction of lowering the traveling machine body 8 in accordance with the swing of the swing arm 72. The traveling machine body 8 is lowered.

  In the state where the traveling machine body 8 is raised and the grounding member 71 is lifted from the upper surface of the heel R, the biasing force of the biasing means 79 is reversed by swinging the grounding member height adjustment lever 101 upward. As a result, the inner cable 80B is pulled, the swing arm 72 swings in the clockwise direction in FIG. 1, and the grounding member 71 moves downward relative to the mission case 5. When the grounding member 71 is in contact with the upper surface of the heel R, the rotary spool 89 of the lift control valve 77 is moved in the direction to raise the traveling machine body 8 in correspondence with the swing of the swing arm 72. The traveling machine body 8 rises.

  In the above configuration, as described above, the biasing means 79 does not extend by the pressing force from the ground during normal planting work, and the swing arm 72 and the interlocking member 78 swing integrally. However, when the traveling machine body 8 is lowered with the engine 7 turned off (that is, with the hydraulic pump not operating), when the interlocking member 78 does not swing due to the regulation of the lift control valve 77 side, The swinging arm 71 swings upward relative to the interlocking member 78 against the urging force of the urging means 79 with respect to the pushing up. At this time, since the inner cable 80A is movable in the length direction in the insertion hole of the locking portion 82, the locking portion 82 moves along the length direction with respect to the inner cable 80A. Allow swinging.

The swing arm 71 swings to prevent damage to the rotary spool 89, the pins 84 and 88a, the support shaft 86, and the like of the lift control valve 77.
Moreover, in the thing of the said structure, since the earthing | grounding member height adjustment lever 101 thru | or the rocking | swiveling arm 72 are interlockingly connected with the planting depth adjustment lever 31 via the locking member 33, one By swinging the planting depth adjusting lever 31, the relative height of the covering member 15 with respect to the movable frame 12B can be changed, and at the same time, the height of the grounding member 71 with respect to the traveling machine body 8 can be changed. When changing the planting depth, there is no need for troublesome adjustment of the grounding member 71 in correspondence with the covering member 15, and the planting depth by the planting body 13 is adjusted by the single planting depth adjusting lever 31. Can be adjusted easily. In addition, by swinging the grounding member height adjusting lever 101, the grounding member 71 can be adjusted to change the height separately from the soil covering member 15 with respect to the traveling machine body 8, and the grounding member height adjusting lever 101 can be adjusted. By the above operation, the grounding member 71 and the soil covering member 15 can be easily adjusted up and down relatively. For this reason, since the phase of the grounding member 71 and the covering member 15 can be set by shifting with one touch, it is possible to cope with various conditions, which is very convenient.

FIG. 7 shows a hydraulic circuit diagram for operating the rolling cylinder 69 and the lifting cylinder 63. In the figure, the pump 131 is configured to supply hydraulic pressure to the lift cylinder 63 via the relief valve 132 and the lift control valve 77. The raising / lowering control valve 77 is configured to be switchable between a raised position U, a neutral position N, and a lowered position D.
The pump 131 is configured to supply hydraulic pressure to the rolling cylinder 69 via the relief valve 135, the horizontal control valve 136, and the check valves 137 and 138. The horizontal control valve 136 controls the hydraulic oil supplied to the rolling cylinder 69 so that the left and right sides of the traveling machine body 8 are horizontal, and is configured to be switchable between the rising position U, the neutral position N, and the lowering position D. Has been. A throttle switching valve 140 is provided between the rolling cylinder 69 and the check valve 137. The throttle switching valve 140 is interposed between the rolling cylinder 69 and the horizontal control valve 136 so as to throttle the flow rate of the hydraulic oil supplied to the rolling cylinder 69 through the horizontal control valve 136, and the flow rate of the hydraulic oil flowing to the rolling cylinder 69. The aperture position X can be switched between an aperture position X for reducing the aperture and an open position Y for opening the aperture.

As shown in FIGS. 8 to 17, on the right side of the grip portion 4 </ b> A of the steering handle 4, an elevating lever 143 for raising and lowering the traveling machine body 8, and a lock lever 145 for locking the horizontal control mechanism 130 so as not to be horizontally controlled, A lock release lever 146 for releasing the lock of the lock lever 145 is provided.
The elevating lever 143 is supported to be swingable around the first support shaft 148 via the boss portion 144, and is supported to be slidable in the axial direction (left and right direction) of the first support shaft 148. The middle part is inserted into the guide groove 150 of the guide member 149, and the elevating lever 143 passes through the guide groove 150 shown in FIG. 17 in the planting position P, the lowered position D, the fixed position F, and the first raised position U1. And it is comprised so that movement operation is possible to the 1st raising position U2.

  The elevating lever 143 is interlocked and connected to the elevating control valve 77 side shown in FIGS. 3, 4, and 7 through a cable, a connecting rod or the like, and when the elevating lever 143 is operated to the fixed position F, the elevating valve The arm 85 is held at the neutral position, and the elevation control valve 77 is switched to the neutral position P. Further, when the elevating lever 143 is operated to the ascending side, that is, the first elevating position U1 or the second elevating position U2, the elevating valve arm 85 rotates the operating lever 88 in the direction of arrow a shown in FIG. 77 switches to the raised position U. Further, when the elevating lever 143 is operated to the descending side, that is, the planting position P or the descending position D, the elevating valve arm 85 is in a state of being freely movable in descending, neutral, and ascending directions. For this reason, the movement of the grounding member 71 and the soil covering member 15 is transmitted to the lift control valve 77 by the interlocking member 78, the operation lever 88 and the interlocking rod 96, and the lift control valve 77 is moved to the raised position U and the neutral position N according to these movements. And switch to the lowered position D.

  Therefore, when the elevating lever 143 is operated to the fixed position F, the elevating cylinder 63 does not expand and contract, and the traveling machine body 8 is fixed so that it cannot be raised and lowered. Further, when the elevating lever 143 is operated to the first ascending position U1 or the second ascending position U2, the elevating cylinder 63 is extended by the control of the elevating control valve 77, and the traveling machine body 8 is raised. Further, when the elevating lever 143 is operated to the planting position P or the lowered position D, the elevating control valve 77 is first switched to the lowered position D, and the elevating cylinder 63 is contracted by the control of the elevating control valve 77, and the traveling machine body 8 is lowered. Then, the grounding member 71 and the soil covering member 15 are grounded, and then the elevation control valve 77 is switched to the neutral position N.

Further, when the elevating lever 143 is operated to the planting position P, the planting clutch is connected, and in conjunction with the traveling of the traveling machine body 8, the planting body 13 moves up and down to plant seedlings in the field, When the elevating lever 143 is disengaged from the planting position P, the planting clutch is disconnected, and the planting body 13 is stopped and does not perform the planting operation.
Further, the lifting lever 143 is linked to the throttle switching valve 140 of FIG. 7 via a cable, a connecting rod, etc., and when the lifting lever 143 is operated to the descending side, that is, the planting position P or the descending position D, When the throttle switching valve 140 is switched to the throttle position X and the elevating lever 143 is operated to the ascending side, that is, the fixed position F, the first rising position U1, or the second rising position U2, the throttle switching valve 140 is switched to the open position Y. It is configured. Accordingly, when the elevating lever 143 is operated to the planting position P or the lowered position D, the flow rate to the rolling cylinder 69 is reduced by the throttle switching valve 140, and the reaction of the horizontal control operation of the traveling machine body 8 is slowed. Is operated to the fixed position F, the first ascending position U1, or the second ascending position U2, the restriction of the flow rate to the rolling cylinder 69 is opened by the restrictor switching valve 140, and the reaction of the horizontal control operation of the traveling machine body 8 is accelerated. .

  Like the lift lever 143, the lock lever 145 is supported so as to be swingable around the first support shaft 148 via a boss portion (not shown), and swings between a lock position A and a lock release position B shown in FIG. It is possible. As shown in FIG. 9, the lock lever 145 is connected to the pendulum side of the horizontal control mechanism 130 via an interlocking member 152 and the like, and when the lock lever 145 is swung to the lock position A, the horizontal control is performed. When the horizontal control mechanism 130 is locked so that the horizontal control of the traveling machine body 8 is not performed by restricting the swing of the pendulum of the mechanism 130 and the lock lever 145 is swung to the unlock position B, the horizontal control is performed. The swing control of the pendulum of the mechanism 130 is removed, the horizontal control mechanism 130 is unlocked, and the horizontal control of the horizontal control mechanism 130 is allowed. As shown in FIG. 9, a coil spring (lock lever biasing means) 153 that biases the lock lever 145 from the lock position A side toward the lock release position B is provided.

  The lock release lever 146 is supported so as to be swingable around a second support shaft 155 parallel to the first support shaft 148, whereby the lock release lever 146 moves the lock lever 145 to the lock position A as shown in FIG. And a retracted position D where the lock lever 145 is unlocked to the lock position A. As shown in FIG. 9, a coil spring (release lever urging means) 156 that urges the lock release lever 146 from the retracted position D side to the lock position C side is provided. When the lock release lever 146 is swung to the retracted position D from C to the retracted position D, the lock release lever 146 is disengaged from the lock position A to the lock position A, and the lock is released. The lever 145 is configured to swing to the unlocking position B by the urging of the lock lever urging means 153.

  That is, the lock lever 145 is provided with an engaging portion 157 constituted by a pin, and the lock releasing lever 146 is engaged with the engaging portion 157 of the lock lever 145 so as to hold the lock lever 145 at the lock position A. A stop portion 159 and a second locking portion 160 that locks the engaging portion 157 of the lock lever 145 to hold the lock lever 145 at the unlock position B are provided, and the lock release lever 146 is operated to the retracted position D. Then, the engaging portion 157 of the lock lever 145 is disengaged from the first locking portion 159, and the lock lever 145 swings to the unlocking position B by the urging of the lock lever urging means 153. The engaging portion 157 is configured to engage with the second locking portion 160 of the lock release lever 146.

  An interlocking piece 161 projects from the boss portion 144 of the elevating lever 143, and the elevating lever 143 and the lock release lever 146 are connected by a connecting member 162 via the interlocking piece 161. One end of the connecting member 162 is connected to the interlocking piece 161 so as to be swingable around the support shaft 163, and an arc-shaped elongated hole 165 centering on the first support shaft 148 is formed at the other end of the connecting member 162. An engaging pin 166 is slidably inserted into the long hole 165 at the end of the free end side of the unlocking lever 146 so that the elevating lever 143 is in the raised position side (first raised position U1). Alternatively, when the swinging operation is performed to the second ascending position U2), the engaging pin 166 slides to one end portion (end portion on the locking position C side) of the long hole 165, and the connecting member 162 is engaged with the engaging pin 166. By pulling the lock release lever 146 to the retracted position D via the lever, the lock release lever 146 is moved to the retracted position D against the bias of the release lever biasing means 156 in conjunction with the lift lever 143. It is configured.

  According to the above embodiment, when performing planting work, as shown in FIG. 8, it is only necessary to operate the lifting lever 143 to the planting position P and operate the lock lever 145 to the unlocking position B. By the operation of the lifting lever 143 to the planting position P, the lifting control valve 77 is switched to the lowered position D, the traveling machine body 8 is lowered, and the grounding member 71 and the soil covering member 15 are grounded. Further, the planting clutch is connected, and the planting body 13 moves up and down in conjunction with the traveling of the traveling machine body 8 to plant the seedling in the field. At this time, the throttle switching valve 140 is switched to the throttle position X, the flow rate to the rolling cylinder 69 is throttled by the throttle switching valve 140, and the reaction of the horizontal control operation of the traveling machine body 8 is automatically delayed. Therefore, during the planting operation, the reaction of the horizontal control operation of the horizontal control mechanism 130 becomes slow, so even when the soil is intermittently provided on both sides of the multi-film covered with the ridge R, It is possible to prevent the rolling of the traveling machine body 8 from increasing and the planting from meandering.

  As shown in FIG. 8, after operating the elevating lever 143 to the planting position P and operating the lock lever 145 to the unlocking position B to perform the planting operation, the elevating lever 143 is moved to the fixed position F, the first position. When operated to the ascending position U1 or the second ascending position U2, the throttle switching valve 140 is switched to the open position Y, the throttle switching valve 140 opens the throttle of the flow rate to the rolling cylinder 69, and the horizontal control operation of the traveling machine body 8 is performed. Since the reaction becomes faster, the traveling machine body 8 can be smoothly returned to the horizontal level when turning, and the traveling machine body 8 can be prevented from being excessively inclined to the left and right even when turning on the contour slope.

  As shown in FIG. 8, in order to lock the horizontal control mechanism 130 from the state where the elevating lever 143 is operated to the planting position P and the lock lever 145 is operated to the unlocking position B, the lock lever 145 is moved to the first support. As shown in FIG. 9, the lock lever 145 is swung to the lock position A as shown in FIG. 9, and the engaging portion 157 of the lock lever 145 engages with the first release of the lock release lever 146. The lock lever 145 is held at the lock position A by engaging with the portion 159, and the horizontal control mechanism 130 can be easily held in the locked state. Therefore, for example, when planting work on an inclined land, the horizontal control mechanism 130 of the traveling machine body 8 can be locked and the planting work can be performed in a state where the traveling machine body 8 is in a horizontal posture with respect to the left-right direction. is there.

  Further, as shown in FIG. 9, in order to release the lock of the horizontal control mechanism 130 from the state where the elevating lever 143 is operated to the planting position P and the lock lever 145 is operated to the lock position A, as shown in FIG. Thus, the lock release lever 146 may be swung from the lock position C to the retracted position D, and the lock position A of the lock lever 145 is released by the lock release lever 146, and as shown in FIG. The lock lever 145 returns to the lock release position B by the urging of the lock lever urging means 153. Accordingly, in order to unlock the horizontal control mechanism 130, it is not necessary to raise the traveling machine body 8 to interrupt the planting operation as in the conventional case, and the horizontal control mechanism 130 can be easily locked during the planting operation. Even if the lock of the horizontal control mechanism 130 is released during the planting operation, it is possible to prevent the planting operation from being interrupted and a portion without planting from occurring in the field.

  Then, as shown in FIG. 9, when the planting lifting lever 143 is operated to the planting position P and the lock lever 145 is operated to the lock position A and the planting operation is performed on the slope, In order to raise the traveling machine body 8 to make a turn, the lifting lever 143 is swung downward from the state of FIG. 9 around the first support shaft 148 as shown in FIG. 12 or FIG. What is necessary is just to set to the raising position U1 or the 2nd raising position U2, and if the raising / lowering lever 143 is operated to the 1st raising position U1 or the 2nd raising position U2, the raising / lowering cylinder 63 will be extended by control of the raising / lowering control valve 77, The traveling machine body 8 rises. At this time, the engaging pin 166 slides to one end of the elongated hole 165 (end on the locking position C side), and the connecting member 162 moves the lock release lever 146 to the retracted position D via the engaging pin 166. By pulling, the lock release lever 146 moves to the retracted position D in conjunction with the lift lever 143. Then, when the lock release lever 146 moves to the retracted position D, the engagement portion 157 of the lock lever 145 is disengaged from the first locking portion 159, and the lock lever 145 is unlocked by the bias of the lock lever biasing means 153. By swinging to the position B, the engaging portion 157 of the lock lever 145 is engaged with the second locking portion 160 of the lock release lever 146.

  Therefore, when the horizontal control mechanism 130 of the traveling machine body 8 is locked on the slope and the planting operation is performed, and the turn lever 143 is moved to the raised positions U1 and U2, the lock lever 145 is locked. It is automatically switched from the position A to the unlock position B, and the horizontal control mechanism 130 is automatically unlocked without requiring a troublesome unlock operation, so that the traveling vehicle body 8 tilts excessively to the left and right. It can turn smoothly while preventing.

  Further, as shown in FIG. 9, in order to fix the traveling machine body 8 so as not to be lifted and lowered from the state where the planting lift lever 143 is operated to the planting position P and the lock lever 145 is operated to the lock position A, From the state, as shown in FIG. 11, the lift lever 143 is swung around the first support shaft 148 and set to the fixed position F. When the lift lever 143 is operated to the fixed position F, the lift control is performed at this time. The valve 77 is switched to the neutral position P, the elevating cylinder 63 does not expand and contract, and the traveling machine body 8 is simply fixed so that it cannot be raised and lowered. At this time, the lock lever 145 remains held at the lock position A.

  In the case of the above-described embodiment, the lift lever 143 and the lock lever 145 are connected with a cable as in the prior art in order to automatically switch the lock lever to the unlocked position when the lift lever is moved upward. The structure of the lifting lever 143, the lock lever 145, and the lock release lever 146 is very simple, and the support structure for the lift lever 143, the lock lever 145, and the lock release lever 146 can be made compact. .

It is a side view of the transplanter which shows one Embodiment of this invention. It is a top view of the traveling body of the transplanter. It is a side view of the raising / lowering mechanism and heel height detection mechanism part of the transplanter. It is a side view of the heel height detection mechanism part of the transplanter. It is a top view of the planting depth adjustment lever and the grounding member height adjustment lever part. It is a side view of the raising / lowering mechanism part of the transplanter. It is the hydraulic circuit diagram. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a side view of the raising / lowering lever, a lock lever, and a lock release lever part. It is a rear view of the guide member of the raising / lowering lever.

Explanation of symbols

8 traveling machine body 10 front wheel 11 rear wheel 69 rolling cylinder 130 horizontal control mechanism 136 horizontal control valve 140 throttle switch valve 145 lock lever 143 lift lever 146 lock release lever 153 lock lever biasing means 156 release lever biasing means 148 first support shaft 155 Second spindle 157 Engaging portion 159 First locking portion 160 Second locking portion 162 Connecting member

Claims (4)

The traveling machine body (8) is supported by the left and right wheels (10, 11) so as to be movable up and down, and when the lifting lever (143) is operated to the lowering side, the left and right wheels (10, 11) are raised to move the traveling machine body. When (8) is lowered and the elevating lever (143) is operated to the ascending side, the left and right wheels (10, 11) are lowered to raise the traveling machine body (8), and the traveling machine body (8 ) Is provided with a horizontal control mechanism (130) for moving the left and right wheels (10, 11) up and down relatively so that the left and right wheels are horizontal, and a lock for locking the horizontal control mechanism (130) to disable horizontal control. A lever (145) is provided, and the lock lever (145) locks the horizontal control mechanism (130) so that it cannot be controlled horizontally, and an unlocking position allows the horizontal control of the horizontal control mechanism (130). (B) In movable and have been transplanted machine,
A lock release lever (146) for releasing the lock of the lock lever (145) is provided, and the lock release lever (146) is a locking position for locking the lock lever (145) to the lock position (A). When (C) and the lock lever (145) are moved to the retracted position (D) where the lock lever (145) is unlocked, the lock release lever (146) is operated to the retracted position (D). Lock lever urging means for urging the lock lever (145) from the lock position (A) side toward the lock release position (B) so that the lock lever (145) moves to the lock release position (B). (153) is provided, release lever urging means (156) for urging the lock release lever (146) from the retracted position (D) side to the locking position (C) side is provided, and the lift lever (143) )But Locked to move the lock release lever (146) to the retracted position (D) against the bias of the release lever biasing means (156) in conjunction with the lift lever (143) when operated to the ascending side. A transplanter characterized in that a release lever (146) is interlocked with a lift lever (143).   The lock lever (145) is swingably supported around the first support shaft (148) so as to be swingable between the lock position (A) and the lock release position (B). (146) is swingably supported around the second support shaft (155) and can be swung from the locking position (C) to the retracted position (D), and the lock release lever (146) is retracted. When the rocking operation is performed to the position (D), the lock lever (145) is rocked to the unlocking position (B) by the urging of the lock lever urging means (153). The transplanter according to claim 1.   The lock lever (145) is provided with an engagement portion (157), and the lock release lever (146) is engaged with the engagement portion (145) of the lock lever (145) to hold the lock lever (145) in the locked position (A). 157) and a second latch for latching the engaging portion (157) of the lock lever (145) to hold the lock lever (145) in the unlocked position B. When the lock release lever (146) is operated to the retracted position (D), the engaging portion (157) of the lock lever (145) is disengaged from the first locking portion (159). The lock lever biasing means (156) biases the lock lever (145) to the unlock position (B), and the engagement portion (157) of the lock lever (145) unlocks the unlock lever (146). Second locking part ( Transplanter according to claim 1, characterized in that it is configured to engage the 60).   The elevating lever (143) is swingably supported around the first support shaft (148), and can be swung between the ascending side and the descending side, and the elevating lever (143) is moved upward. When operated, the unlocking lever (146) is moved via the connecting member (162) so that the unlocking lever (146) moves to the retracted position (D) in conjunction with the lifting lever (143). The transplanter according to claim 2, wherein the transplanter is connected to the device.

Images