JP6724482B2 - Seedling transplanter - Google Patents

Description

The present invention relates to a seedling transplanter.

BACKGROUND ART Conventionally, a seedling transplanter is known in which seedlings are planted in a field by a seedling planting part while leveling a field scene with a leveling device while traveling by a traveling vehicle body having traveling wheels. As such a seedling transplanter, one in which a seedling planting part is provided in the rear part of the traveling vehicle body and which has a support part for movably supporting the ground leveling device in the vertical direction between the traveling vehicle body and the seedling planting part. It is known (for example, refer to Patent Document 1).

JP, 2014-87272, A

However, the conventional seedling transplanter has room for further improvement in making the body compact. For example, in a conventional seedling transplanter, the posture of the machine body may become unstable when the machine body is inclined on an inclined surface or the like. Such destabilization of the posture becomes greater as the seedling planting part, which may be relatively heavy, is located farther from the traveling vehicle body.

The present invention has been made in view of the above, and an object of the present invention is to provide a seedling transplanter capable of making the body compact.

In order to solve the above-mentioned problems and to achieve the object, the seedling transplanter according to claim 1 comprises a traveling vehicle body (2) traveling in a field by traveling wheels (4, 5) provided on both left and right sides, A seedling planting part (40) for planting seedlings loaded on the rear part of the traveling vehicle body (2) into a field, and a leveling device (GL) arranged below the seedling planting part (40) and leveling a field scene. ) And a support part (49) for supporting the soil leveling device (GL) while extending forward between the bottom of the seedling planting part (40) and the field.

The seedling transplanter according to claim 2, wherein in the seedling transplanter according to claim 1, the ground leveling device (GL) includes a leveling rotor (70) that rotates around a first rotation axis (AX2), The support portion (49) is rotatably supported by a second rotation shaft (AX1) that is substantially parallel to the first rotation shaft (AX2) and supports the leveling rotor (70) so as to be vertically rotatable. The second rotating shaft (AX1) is located at a position lower than the upper end and higher than the lower end of the moving range of the first rotating shaft (AX2).

The seedling transplanting machine according to claim 3 is the seedling transplanting machine according to claim 2, wherein the rear end side is connected to the seedling planting part (40) to support the seedling planting part (40) so as to be vertically movable. The stay (78a) further includes: a link member (52), a stay (78a) protruding upward from the support portion (49), and a contact member (78b) provided at an upper end of the stay (78a). ), when the seedling planting part (40) is further raised from the state where the contact member (78b) is in contact with the link member (52), the leveling rotor (70) is supported together with the support part (49). It is characterized in that it is pushed downward around the second rotation axis (AX1).

The seedling transplanter according to claim 4 is the seedling transplanter according to claim 3, wherein the pillar (81) protruding upward from the support portion (49) and the upper end of the pillar (81) are provided. An abutting member (81a), a stopper arm (82), one end of which is pivotally supported by the seedling planting portion (40) and which is rotatable in the vertical direction, and a rotating operation of the stopper arm (82). Then, a handle (84) capable of fixing the stopper arm (82) at a predetermined position and a biasing member (SP) for biasing the contact member (81a) toward the stopper arm (82). Further, the handle (84) further rotates the stopper arm (82) downward from a state where the contact member (81a) is in contact with the stopper arm (82), and then the leveling rotor (70). Is pushed down around the second rotation shaft (AX1) together with the support portion (49).

The seedling transplanter according to claim 5 is the seedling transplanter according to claim 4, wherein the handle (84) is provided between the traveling vehicle body (2) and the seedling planting portion (40). A position where the upper end of the handle (84) is higher than the link member (52) by rotating the stopper arm (82) via a rod (83) connected to the other end of the stopper arm (82). It is characterized by being in.

The seedling transplanting machine according to claim 6 is the seedling transplanting machine according to claim 5, wherein the handle (84) has a horizontal portion to which the rod (83) is connected at its tip, and a rear end of the horizontal portion. Is a substantially L-shaped plate-like member having a vertical portion extending upward from the corner portion and is rotatably attached by a support shaft (AX4) in the vicinity of the corner portion, and the vertical portion can be rotated in the left-right direction. It is characterized in that it is provided in.

The seedling transplanting machine according to claim 7 is the seedling transplanting machine according to any one of claims 4 to 6, which is arranged below the seedling planting section (40), and slides in a field to smooth the soil. A float (61) and a planting depth adjusting mechanism (60) for changing the planting depth of the seedling by vertically displacing the float (61) with respect to the planting section (40). The planting depth adjusting lever (201) for displacing the float (61) to the planting depth adjusting mechanism (60) by a rotation operation about an axis and the stopper arm (82) are connected to the planting depth adjusting lever (201). An arm that forms a rotary link mechanism together with the depth adjusting lever (201) and the stopper arm (82), and rotates the stopper arm (82) in the vertical direction by rotating the planting depth adjusting lever (201). (204) is further provided, and the stopper arm (82) rotates downward when the planting depth adjusting lever (201) is operated in a direction of moving the float (61) downward, It is characterized in that the leveling rotor (70) is pushed downward together with the support portion (49) around the second rotation axis (AX1).

The seedling transplanter according to claim 8 is the seedling transplanter according to any one of claims 1 to 7, wherein the seedling transplanter is provided at a front portion of the traveling vehicle body (2) and moves the traveling vehicle body (2). The rushing handle (300) to be operated, a switch (302) provided near the rushing handle (300) for stopping the engine (10) of the traveling vehicle body (2), the switch (302) and the switch (302). The engine (10) further includes a wire (306) that is connected to a clutch pedal (304) of the traveling vehicle body (2) and that applies a pulling force to the switch (302) by operating the clutch pedal (304). Is started including the operation of the clutch pedal (304), and the switch (302) stops the engine (10) by operating one of the switch (302) and the clutch pedal (304). The feature is that the operation state is released.

The seedling transplanting machine according to claim 9 is the seedling transplanting machine according to claim 8, wherein a shift lever (7) for operating the traveling speed and the forward/reverse switching of the ridge handle (300) and the traveling vehicle body (2). 35) is further provided with connecting portions (308, 308a), and the shift lever (35) is moved forward from a neutral position where the traveling vehicle body (2) is stopped, thereby shifting the shift lever (35). The traveling vehicle body (2) is operated to move forward while increasing the speed as the position of the connecting portion (308, 308a is increased). ) Positions the speed change lever (35) to the neutral position at a position where the tide control handle (300) is not operated, and operates the speed change lever (35) in conjunction with the rotation of the tide control handle (300). 35) is moved forward and backward.

The seedling transplanter according to claim 10 is the seedling transplanter according to claim 9, wherein when the shift lever (35) is moved rearward by the ridge handle (300), the shift from the neutral position is performed. It is characterized by further comprising a restricting portion (310d) restricting the movement of the lever (35).

The seedling transplanting machine according to claim 11 is the seedling transplanting machine according to claim 9 or 10, wherein the rotation range of the ridge pull handle (300) is restricted to move by the ridge pull handle (300). It further comprises a rotation restricting portion for restricting the amount of forward movement of the speed change lever (35).

According to the seedling transplanter described in claim 1, the seedling transplanter can be made compact by shortening the entire length of the body of the seedling transplanter. The support part extends forward of the traveling vehicle body between the bottom of the seedling planting part and the field to support the ground leveling device. Thereby, for example, it is not necessary to provide a support part of the ground leveling device between the traveling vehicle body and the seedling planting portion, and the seedling planting portion can be arranged close to the traveling vehicle body.

According to the seedling transplanter described in claim 2, in addition to the effect of the invention described in claim 1, by shortening the overall length of the body of the seedling transplanter, the seedling transplanter can be made more compact. .. Due to the positional relationship between the first rotary shaft and the second rotary shaft, the moving direction of the ground leveling rotor is substantially vertical. This makes it possible to reduce the amount of movement in the front-back direction that accompanies the vertical movement of the leveling rotor, and it is possible to shorten the escape space that avoids interference with the leveling rotor in the front-back direction of the machine body. That is, it is possible to dispose the seedling planting portion closer to the traveling vehicle body.

According to the seedling transplanter described in claim 3, in addition to the effect of the invention described in claim 2, avoiding a situation where the leveling rotor and the link member interfere when the seedling planting part is moved up and down. You can This is because it is possible to move the ground leveling rotor away from the link member as the seedling planting section is raised by the link member. Further, since the stay is provided on the support portion of the leveling rotor, the structure can be simplified and the cost can be reduced.

According to the seedling transplanter described in claim 4, in addition to the effect of the invention described in claim 3, the troublesome work of setting the height of the ground leveling rotor every time the seedling planting part is moved up and down is avoided. It is possible to improve the sex. Since the contact member and the support portion are not connected, even if the seedling planting portion is lifted by the link member and the grounding rotor is pushed down around the second rotation axis by the stay, the stopper arm rotates. do not do. Thereby, the positions of the stopper arm and the handle set by the operator are maintained regardless of the elevation of the seedling planting section. Further, since the upward movement of the leveling rotor is restricted by the stopper arm, it is possible to avoid the situation where the support portion interferes with the seedling planting portion.

According to the seedling transplanter described in claim 5, in addition to the effect of the invention described in claim 4, the accessibility of the handle for adjusting the vertical position of the ground leveling rotor can be improved. This is because the handle is on the front side of the seedling planting part when viewed from the traveling vehicle body, and the upper end of the handle is located higher than the link member.

According to the seedling transplanter described in claim 6, in addition to the effect of the invention described in claim 5, operability of the handle for adjusting the vertical position of the grounding rotor can be improved. Since the operating direction of the steering wheel is the left-right direction of the traveling vehicle body, it is possible to eliminate the operation of moving the steering wheel backward, that is, in the direction away from the traveling vehicle body.

According to the seedling transplanter described in claim 7, in addition to the effect of the invention described in any one of claims 4 to 6, the planting depth of the seedling and the height of the leveling rotor are set separately. The annoyance can be avoided and the workability can be improved. Specifically, when the planting depth adjusting lever moves so that the planting depth becomes shallow by moving the float downward with respect to the seedling planting portion, the stopper arm that interlocks with the planting depth adjusting lever. The ground leveling rotor moves downward by the rotation of. When the float is moved upward with respect to the seedling planting section and the planting depth adjusting lever is moved so that the planting depth becomes deep, the biasing member moves the leveling rotor upward. Also, since the planting depth adjusting lever and the stopper arm are connected by a rotary link mechanism, when operating the handle of the grounding rotor, the planting depth is linked with the vertical rotation of the stopper arm. The adjustment lever also moves. Therefore, the planting depth of seedlings and the height of the leveling rotor can be changed in association with each other.

According to the seedling transplanter described in claim 8, in addition to the effect of the invention described in any one of claims 1 to 7, operability can be improved. The operating state in which the engine of the switch is stopped is released by operating one of the switch and the clutch pedal. Further, starting the engine includes operating the clutch pedal. As a result, even if the operator stops the engine with the switch provided in the front part of the traveling vehicle body and forgets to release the switch and tries to restart the engine by riding on the traveling vehicle body, the switch is automatically operated. Is released. That is, it is possible to prevent an erroneous operation caused by forgetting to release the switch.

According to the seedling transplanter described in claim 9, in addition to the effect of the invention described in claim 8, operability and safety can be improved. Since the ridge handle and gear shift lever are interlocked, it is possible to move the traveling car body while adjusting the speed from outside the traveling car body in a dangerous place where the seedling transplanter such as a ridge may fall. Because it will be.

According to the seedling transplanter described in claim 10, in addition to the effect of the invention described in claim 9, safety can be further improved. This is because it is possible to regulate the backward movement of the traveling vehicle body when the traveling vehicle body is moved by operating the ridge handle. For example, even if the worker feels dangerous and suddenly pushes back the ridge pulling handle, the speed change lever stops at the neutral position, so that the traveling vehicle stops.

According to the seedling transplanter described in claim 11, in addition to the effect of the invention described in claim 9 or 10, safety can be further improved. By restricting the amount of forward movement of the shift lever, the forward speed of the traveling vehicle can be regulated. Therefore, it is possible to avoid a situation in which the speed of the traveling vehicle becomes unnecessarily high due to an erroneous operation or the like.

FIG. 1 is a schematic side view of a seedling transplanter. FIG. 2 is a schematic plan view of the seedling transplanter. FIG. 3 is a schematic plan view of the leveling rotor. FIG. 4 is a schematic diagram illustrating the movement distance of the leveling rotor. FIG. 5 is a schematic side view of an up-down adjusting mechanism of the leveling rotor. FIG. 6 is a view showing the handle of the up-down adjusting mechanism of the leveling rotor. FIG. 7 is a diagram for explaining the operation of the lever portion. FIG. 8 is a schematic side view of the planting depth adjusting mechanism. FIG. 9 is a diagram illustrating an example of a release operation of the emergency stop switch. FIG. 10 is a schematic side view of a connecting portion between the shift lever and the ridge pull handle. FIG. 11 is a schematic top view of the gate of the shift lever. FIG. 12 is a schematic diagram showing a modified example of the connecting portion. FIG. 13 is a schematic diagram showing a modified example of the wire.

<Overall structure of seedling transplanter>
Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiments described below. Further, the constituent elements in the following embodiments include those that can be easily conceived by those skilled in the art or those that are substantially the same, that is, those in the so-called equivalent range. Further, the constituent elements in the following embodiments can be appropriately combined.

FIG. 1 is a schematic side view of the seedling transplanting machine 1, FIG. 2 is a schematic plan view of the seedling transplanting machine 1, and FIG. 3 is a schematic plan view of the leveling rotor 70. Note that, in FIG. 3, the seedling placing portion 45 is transparently shown from the viewpoint of making the description easy to understand.

In the following, the front-rear, left-right direction reference is defined as the front-rear, left-right reference based on the traveling direction of the vehicle body as viewed from the cockpit. The traveling vehicle body 2 of the seedling transplanter 1 shown in FIGS. 1 and 2 has a pair of left and right front wheels 4 and a pair of left and right rear wheels 5, and is a four-wheel drive vehicle driven by each wheel during traveling. .. Further, a rear part of the traveling vehicle body 2 is provided with a seedling planting section 40 that can be raised and lowered by a seedling planting section raising/lowering mechanism 50.

The traveling vehicle body 2 has a main frame 7 arranged substantially in the center of the vehicle body, an engine 10 mounted on the main frame 7, and a power transmission for transmitting a driving force of the engine 10 to a drive wheel and a seedling planting section 40. And a mechanism 15. That is, in the seedling transplanting machine 1, the power of the engine 10 drives the traveling vehicle body 2 to move forward and backward, and also drives the seedling planting section 40. A heat engine such as a diesel engine or a gasoline engine is used as the engine 10.

The engine 10 is disposed substantially in the center of the traveling vehicle body 2 in the left-right direction and in a state of being projected above a floor step 26 on which an operator places his/her feet when riding. The floor step 26 is provided between the front part of the traveling vehicle body 2 and the rear part of the engine 10 and is mounted on the main frame 7. A part of the floor step 26 has a lattice shape, and mud attached to the shoes of the worker can be dropped onto the field. A rear step 27 that doubles as a fender for the rear wheel 5 is provided behind the floor step 26. The rear step 27 has an inclined surface that is inclined upward in a rearward direction, and is arranged on each of the left and right sides of the engine 10.

The engine 10 projects upward from the floor step 26 and the rear step 27, and an engine cover 11 that covers the engine 10 is arranged in the projecting portion. That is, the engine cover 11 covers the engine 10 while protruding upward from the floor step 26 and the rear step 27.

A pilot seat 28 is installed in the upper portion of the engine cover 11 of the traveling vehicle body 2, and a steering portion 30 is arranged in front of the pilot seat 28 and in the center of the front side of the traveling vehicle body 2. The control unit 30 is arranged so as to project upward from the floor surface of the floor step 26, and divides the front side of the floor step 26 into left and right.

Various operating devices, a fuel tank for engine fuel, and the like are provided inside the control unit 30, and a front cover 31 that can be opened and closed is provided at the front of the control unit 30. In addition, an operation lever for operating the operation device, instruments, and a handle 32 are provided on the upper portion of the control unit 30. The steering wheel 32 is provided as a steering member that steers the traveling vehicle body 2 by an operator steering the front wheels 4, and steers the front wheels 4 via an operation device in the control unit 30. In addition, the lever includes a speed change lever 35, which is a traveling operation member that operates the forward travel and traveling speed of the traveling vehicle body 2, and an operating state of the seedling planting section 40, at least a rising state by the seedling planting section elevating mechanism 50. A raising/lowering lever 36 with a plant, which is an operation member with a plant, which can be switched by. Specifically, it is possible to switch the operating state of the seedling planting section 40, and to switch and set each mode of “up”, “stop”, “down”, and “planting”. It has become.

In addition, a spare seedling stand 130 for placing supplementary seedlings is arranged at the portions of the floor step 26 located on the left and right sides of the control unit 30, respectively. The preliminary seedling stand 130 is rotatably supported by a support shaft (vertical shaft) protruding from the floor surface of the floor step 26.

Further, the power transmission mechanism 15 has a hydraulic continuously variable transmission 16 as a main transmission, and a belt type power transmission mechanism 17 for transmitting the power from the engine 10 to the hydraulic continuously variable transmission 16. The hydraulic continuously variable transmission 16 is a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). Therefore, the hydraulic continuously variable transmission 16 generates hydraulic pressure by a hydraulic pump driven by power from the engine 10, converts the hydraulic pressure into mechanical force (rotational force) by a hydraulic motor, and outputs the mechanical force (rotational force). The hydraulic continuously variable transmission 16 is arranged in front of the engine 10 and below the floor surface of the floor step 26, and is arranged in front of the engine 10 when viewed from the upper surface of the traveling vehicle body 2.

The belt-type power transmission mechanism 17 includes a pulley attached to an output shaft of the engine 10, a pulley attached to an input shaft of the hydraulic continuously variable transmission 16, a belt wound around both pulleys, and a tension of the belt. And a tension pulley for adjusting. As a result, the belt-type power transmission mechanism 17 transmits the power generated by the engine 10 to the hydraulic continuously variable transmission 16 via the belt.

Further, the power transmission mechanism 15 has a mission case 18 to which an output from the engine 10 is transmitted via a belt type power transmission mechanism 17 and a hydraulic continuously variable transmission 16. The mission case 18 is attached to the front part of the main frame 7. The mission case 18 shifts the output from the engine 10 transmitted via the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16 by the auxiliary transmission in the mission case 18 so that the front wheels 4 and the rear wheels 4 can be shifted. The driving power to the wheels 5 and the driving power to the seedling planting section 40 are separately output.

Of these, a part of the driving power can be transmitted to the front wheels 4 via the left and right front wheel final cases 21, and the rest can be transmitted to the rear wheels 5 via the left and right rear wheel gear cases 22. .. The left and right front wheel final cases 21 are arranged on the left and right sides of the mission case 18, respectively, and the left and right front wheels 4 are connected to the left and right front wheel final cases 21 via axles. Further, the front wheel final case 21 can be driven according to the steering operation of the steering wheel 32 to steer the front wheels 4. Similarly, the rear wheels 5 are connected to the left and right rear wheel gear cases 22 via axles. On the other hand, the driving power is transmitted to a planting clutch (not shown) provided at the rear part of the traveling vehicle body 2, and is transmitted to the seedling planting section 40 by a planting transmission shaft (not shown) when the planting clutch is engaged. It

Further, the seedling planting part elevating mechanism 50 for raising and lowering the seedling planting part 40 provided at the rear part of the traveling vehicle body 2 has an elevating link 51. The seedling planting section 40 is attached to the traveling vehicle body 2 via an elevating link 51. The elevating link 51 has a link member 52 that is a parallel link mechanism that connects the rear portion of the traveling vehicle body 2 and the seedling planting portion 40. The link member 52 has two members that extend substantially in the front-rear direction, and is an upper link 53 that is an upper link member that is relatively positioned on the upper side, and a lower link that is positioned on the lower side of the upper link 53. And a link 54. Both the upper link 53 and the lower link 54 are provided in a pair of left and right.

In the link member 52, the upper link 53 and the lower link 54 are rotatably connected to a link base frame 55 which is a rear-view portal type rear frame erected on the rear side of the main frame 7, and other links The end side is rotatably connected to the seedling planting portion 40, so that the seedling planting portion 40 is connected to the traveling vehicle body 2 so as to be able to move up and down. That is, the link base frame 55 is arranged in the rear portion of the traveling vehicle body 2 so as to extend in the vertical direction, and the link member 52 extends rearward from the link base frame 55. In the link member 52, both the upper link 53 and the lower link 54 are rotatably connected to the link base frame 55 on the front end side.

The seedling planting part elevating mechanism 50 has a hydraulic elevating cylinder 56 that expands and contracts by hydraulic pressure, and the expanding and contracting operation of the hydraulic elevating cylinder 56 elevates the seedling planting part 40. The seedling planting section elevating mechanism 50 is capable of raising and lowering the seedling planting section 40 to a non-working position or a ground work position (ground planting position) by a lifting operation.

The seedling planting section 40 can plant the seedlings in a plurality of sections or in a plurality of rows, and in the seedling transplanter 1 according to the present embodiment, the seedlings are planted in four sections, that is, so-called four-row planting. It is a seedling planting section 40. The seedling planting section 40 includes a planting device 41, a seedling placing section 45, and a float 61. The seedling placing portion 45 has the seedling placing surfaces 46 that are partitioned in the left-right direction of the traveling vehicle body 2 and correspond to the number of planting lines, and the mat-shaped seedlings with soil are placed on the respective seedling placing surfaces 46. Is possible. As a result, every time the seedlings placed on the seedling placing portion 45 are planted and lost, for example, it is not necessary to return to take the seedlings out of the field, and continuous work can be performed, thus improving work efficiency.

In addition, the planting device 41 is a device for planting the seedlings placed on the seedling placing surface 46 in the field. One planting device 41 is arranged for every two rows and is provided with two planting claws 42. Note that, as shown in FIG. 2, as the driving power to the seedling planting section 40, the output from the engine 10 is transmitted via the shaft 48a. The planting device 41 has a planting part support pipe 48 that extends in the left-right direction of the traveling vehicle body 2 and has a drive shaft inside, and the planting claw 42 is driven by the rotation of the drive shaft. Further, the float 61 slides on the field scene to level the ground as the traveling vehicle 2 moves, and the center float 62 located in the center of the seedling planting section 40 in the lateral direction of the traveling vehicle 2 and the lateral seedling planting. And side floats 63 located on both sides of the attachment part 40.

The float 61 adjusts the planting depth of the seedlings planted in the planting section 40 by the planting depth adjusting mechanism 60. The planting depth adjusting mechanism 60 can adjust the planting depth of the seedlings by adjusting the vertical position of the seedling planting section 40 with respect to the field. By adjusting the relative position with respect to the planting part 40, the vertical position of the seedling planting part 40 with respect to the field can be adjusted.

On the front side of the lower side of the seedling planting section 40, there is provided a leveling rotor 70 which is a leveling device GL for leveling the field. The leveling rotor 70 is rotatably provided around a rotation shaft extending in the left-right direction of the traveling vehicle body 2 by an output from the engine 10 transmitted via the rear wheel gear case 22 and the interlocking shaft 59. The drive source of the interlocking shaft 59 is not limited to the engine 10, and may be, for example, a motor provided separately from the engine 10. In this case, the rotation speed of the interlocking shaft 59 can be determined independently of the rotation speed of the engine 10. As a result, the interlocking shaft 59 (the leveling rotor 70) can be rotated at high speed even when the speed of the traveling vehicle body 2 is low (that is, the rotational speed of the engine 10 is low). Therefore, even in a rough field, the leveling rotor 70 can be rotated at a high speed while the traveling vehicle body 2 is moving at a low speed, and the reliability of the leveling operation can be improved. When the drive source of the interlocking shaft 59 is the above-mentioned motor, a power transmission device from such a motor to the ground leveling rotor 70 is provided with a switchable Hi/Lo gear, for example, and the leveling rotor 70 is provided in two stages of Hi/Lo. The rotation speed of may be changed.

As shown in FIGS. 1 and 3, the ground leveling rotor 70 is supported by a support portion 49 attached to the planting portion support pipe 48. The support portion 49 includes a stay support portion 49a, a rotor stay 49b, and a rotor support portion 49c. The stay support portion 49a supports the rotor stay 49b below the planting portion support pipe 48 so as to be rotatable about a horizontal axis (see the axis AX1 in FIG. 1) of the traveling vehicle body 2. FIG. 1 shows an example in which the stay support portion 49a extends downward from the planting portion support pipe 48.

As shown in FIG. 1, the rear end of the rotor stay 49b is supported below the planting part support pipe 48 by the stay support part 49a. As shown in FIG. 3, a rotor support 49c is attached to the front end of the rotor stay 49b. Further, the front end of the rotor stay 49b supports the rotor support portion 49c so that the rotor support portion 49c is located above the leveling rotor 70. The rotor support portion 49c rotatably supports the leveling rotor 70 from a member (see FIG. 3) extending in the left-right direction of the traveling vehicle body 2. Note that, in FIG. 1, the rotation axis of the leveling rotor 70 is shown as an axis AX2.

As described above, in the seedling transplanting machine 1 according to the present embodiment, the support portion 49 (rotor stay 49b) supports the leveling rotor 70 from below the planting portion support pipe 48 under the seedling planting portion 40. To be configured. That is, the rotation fulcrum of the leveling rotor 70 (that is, the axis AX1) is provided at a position lower than the seedling planting section 40. As a result, the axis AX1 can be positioned within the vertical movement range of the axis AX2, and the amount of movement in the front-back direction that accompanies the vertical movement of the grounding rotor 70 can be reduced. Therefore, the overall length of the seedling transplanter 1 can be shortened by reducing the distance between the leveling rotor 70 and the rear wheel 5 or the float 61 in the front-rear direction of the traveling vehicle body 2.

Here, details of this point will be described with reference to FIG. FIG. 4 is a schematic diagram illustrating the movement distance of the leveling rotor 70. In FIG. 4, the leveling rotor 70 is schematically shown by a solid line, a dotted line, and a dashed-dotted circle. A locus T1 shown in FIG. 4 shows a locus of the rotation axis AX2 of the ground leveling rotor 70 when it rotates around the axis AX1, and a locus T2 shows a rotation axis AX2 of the ground leveling rotor 70 when it rotates around the axis AX11. The locus is shown. As shown in FIG. 4, the axis AX1 is located within the vertical movement range of the rotation axis AX2 (see the movement range W1 in FIG. 4). In this case, when the rotation axis AX2 moves vertically in the entire range of the movement range W1, the rotation axis AX2 moves the distance G1 in the front-rear direction.

On the other hand, when the rotation axis AX2 rotates around the rotation axis AX11 located outside the movement range W1, when the rotation axis AX2 moves vertically in the entire movement range W1, the rotation axis AX2 moves in the front-rear direction. Move a distance G2 that is greater than the distance G1. That is, when the rotation axis (axis AX1) of the leveling rotor 70 is positioned within the movement range of the rotation axis (rotation axis AX2) of the leveling rotor 70 in the vertical direction, the axis AX1 is located outside this range ( Compared with the axis AX11), the amount of movement of the leveling rotor 70 in the front-rear direction can be reduced. The axis AX1 is preferably located at the center position of the moving range W1 in the vertical direction. This makes it possible to minimize the distance G1.

Returning to FIG. 1 to FIG. 3, the description will be continued. In the present embodiment, as shown in FIG. 3, a pair of rotor stays 49b (and stay support portions 49a) are provided, and each rotor stay 49b is located in the gap between the floats 61 in the left-right direction of the traveling vehicle body 2. Is provided. Specifically, as shown in FIG. 3, a rotor stay 49b is provided between the center float 62 and the side float 63 in the left-right direction of the traveling vehicle body 2, respectively. This can prevent the rotor stay 49b from interfering with the float 61 even if the rotor stay 49b is rotated downward about the axis AX1 when the ground leveling rotor 70 is positioned below, for example.

Further, as shown in FIG. 3, a contact portion 78 is provided on the rotor support portion 49c. The contact portion 78 has a stay 78a and a contact member 78b. The stay 78a is attached to the rotor support portion 49c and supports the contact member 78b between the leveling rotor 70 and the lower link 54. The contact member 78b is a rod-shaped member that is substantially parallel to the left-right direction of the traveling vehicle body 2. Details of the operation of the contact portion 78 will be described later with reference to FIG. 7.

The left and right sides of the seedling planting section 40 are provided with line drawing markers 135 that form a line as a guide in the traveling direction on the next planting strip. That is, the line drawing marker 135 draws a mark on the field when the seedling transplanter 1 turns straight ahead in the field and then turns straight at the edge of the field and then goes straight ahead. The wire drawing markers 135 are provided so that the left and right wire drawing markers 135 can be interchanged and operated each time the traveling vehicle body 2 turns.

Further, a fertilizer application device 150 is mounted behind the cockpit 28. The fertilizer application device 150 transfers a fertilizer tank 151 that stores fertilizer, a fertilizer feeding unit 152 that feeds the fertilizer in the fertilizer tank 151 downward by a fixed amount, and the fed fertilizer to the seedling planting unit 40 side by a fertilizer hose 154. And a blower 153 for The fertilizer application device 150 is disposed below the seedling planting unit 40, is provided on the front side of the fertilizer application guide 155 and the fertilizer application guide 155 to which fertilizer is transferred by the fertilizer hose 154, and is also transferred by the fertilizer hose 154. And a grooving device 156 for dropping into the fertilizer ditch formed near the side of the seedling planting part 40.

<Vertical adjustment mechanism for leveling rotor>
The seedling transplanter 1 according to the present embodiment includes an up-and-down adjusting mechanism 80 for the leveling rotor 70. For example, an operator can adjust the height of the leveling rotor 70 to perform leveling of a field at an arbitrary height. it can. The details of the vertical adjustment mechanism 80 will be described below with reference to FIGS. 5 and 6. FIG. 5 is a schematic side view of the vertical adjustment mechanism 80 of the leveling rotor 70. FIG. 6 is a view showing the handle 84 of the vertical adjustment mechanism 80 of the leveling rotor 70. Note that, for convenience of explanation, in FIG. 5, the leveling rotor 70, the protruding portion 81a, and the stopper arm 82 that move in the vertical direction are shown by dotted lines. Further, in FIG. 6, a part of the handle 84 that rotates around the axis AX4 is shown by a dotted line.

As shown in FIG. 5, the vertical adjustment mechanism 80 includes a stay 81, a stopper arm 82, a rod 83, a handle 84, and a slide 85. The stay 81 is provided so as to project from the rotor support portion 49c to the front and the upper side of the traveling vehicle body 2. At the tip of the stay 81, a protrusion 81a that protrudes in the substantially left-right direction is provided.

One end of the stopper arm 82 in the front-rear direction is rotatably supported by the frame 64 of the planting depth adjusting mechanism 60 about an axis AX3 that is substantially parallel to the left-right direction, and the lower surface abuts the protruding portion 81a. The other end of the stopper arm 82 in the front-rear direction is rotatably connected to the handle 84 by a rod 83. As shown in FIG. 6, the handlebar 84 is provided rotatably around the axis AX4 in the front-rear direction of the traveling vehicle body 2 with respect to the slide 85 fixed to the frame 64.

As shown in FIG. 6, the handlebar 84 has an L-shape when viewed from the front (that is, viewed from the front of the traveling vehicle body 2), and when one end of the handlebar 84 is moved in the left-right direction, the handlebar 84 rotates about the axis AX4, The other end of the handle 84 moves vertically. Specifically, when one end of the handle 84 is moved to the right of the traveling vehicle body 2 (see arrow 102 in FIG. 6), the other end of the handle 84 moves upward (see arrow 106 in FIG. 6). The rod 83 is pulled up. On the other hand, when one end of the handle 84 is moved to the left of the traveling vehicle body 2 (see arrow 104 in FIG. 6), the other end of the handle 84 moves downward (see arrow 108 in FIG. 6), and the rod 83 It is pushed down. The handle 84 and the slide 85 have engaging portions 85a that engage with each other, and one end of the handle 84 can be locked to the slide 85 at predetermined intervals in the left-right direction, for example.

As shown in FIG. 5, when the rod 83 moves downward (see arrow 110 in FIG. 5), the stopper arm 82 rotates downward around the axis AX3 (see arrow 112 in FIG. 5). When the stopper arm 82 rotates downward, the protrusion 81a moves while contacting the lower surface of the stopper arm 82, so that the stay 81 is pushed downward. As a result, the leveling rotor 70 moves downward (see arrow 114 in FIG. 5). In FIG. 5, the protruding portion 81a that moves while contacting the lower surface of the stopper arm 82 is schematically shown by a dotted line.

The leveling rotor 70 may be moved upward by the weight of the seedling transplanting machine 1 with respect to the field, or may be biased upward, for example, by a biasing member. FIG. 5 shows an example in which the biasing member is a spring SP that connects the rotor stay 49b of the support portion 49 and the frame 64. Thus, by biasing the support portion 49 upward (to the seedling planting portion 40 side) by the biasing member, for example, when the seedling planting portion 40 is moved up and down by the seedling planting portion elevating mechanism 50, the leveling rotor. It is possible to suppress the shaking of 70. Therefore, it is possible to more reliably prevent the interference with the rear wheel 5 and the elevating link 51. Instead of the spring SP as the biasing member, a torsion spring may be provided on the shaft AX1 to bias the support portion 49 upward about the shaft AX1.

In this way, in the vertical adjustment mechanism 80, the stopper arm 82 and the handle 84, which are connected via the rod 83, form a so-called parallel link mechanism, and the vertical position of the leveling rotor 70 is adjusted by the operation of the parallel link mechanism. It is possible. Accordingly, the handle 84 can be provided at an arbitrary height by appropriately determining the length of the rod 83, for example. In the present embodiment, the case where the upper end of the handle 84 is located above the rear step 27 is shown as an example (see FIG. 1 ). As a result, the worker can easily access the steering wheel 84 from the floor step 26, the rear step 27, and the cockpit 28, so that the workability is improved. Further, if the handlebar 84 is tilted toward the pilot seat 28, the handlebar 84 can be brought closer to the pilot seat 28, and the workability can be improved. Further, since the vertical adjustment mechanism 80 has the parallel link mechanism including the rod 83, the structure can be simplified and the cost can be reduced.

Further, the protruding portion 81 a only contacts the lower surface of the stopper arm 82, and is not connected to the stopper arm 82. As a result, even if the projecting portion 81a (leveling rotor 70) is lowered, for example, in the work of planting seedlings, the stopper arm 82 is not lowered. Therefore, it is possible to avoid the situation where the handle 84 moves due to the elevation of the leveling rotor 70, and the workability can be improved. Further, if the protruding portion 81a (the leveling rotor 70) rises, for example, in the work of planting seedlings, the protruding portion 81a comes into contact with the stopper arm 82 and its upward movement is restricted. Therefore, it is possible to avoid the situation where the rotor stay 49b interferes with the seedling planting section 40 and the like.

<Interference prevention mechanism for leveling rotor>
Here, the seedling transplanting machine 1 according to the present embodiment includes the contact portion 78, and when the seedling planting portion 40 moves up and down by the seedling planting portion elevating mechanism 50, the soil landslide rotor 70 is pushed down to lower the soil. The rotor 70 is prevented from interfering with the rear wheel 5 and the elevating link 51. Hereinafter, the operation of the contact part 78 and the ground leveling rotor 70 associated with the raising and lowering of the seedling planting part 40 will be described in detail with reference to FIG. 7. FIG. 7 is a diagram for explaining the operation of the contact portion 78. In FIG. 7, the support part 49 and the vertical adjustment mechanism 80 at the ground work position are shown by solid lines, and the lower link 54, the leveling rotor 70, and the contact part 78 when the seedling planting part 40 is at the uppermost part are shown by dotted lines. Showing.

When the seedling planting part 40 is lifted by the seedling planting part elevating mechanism 50, the contact member 78b contacts the lower surface of the lower link 54 at a predetermined height, and the contacting member 78b of the seedling planting part 40 is maintained while maintaining such a contact state. Along with the ascent, the lower link 54 moves in the direction from the rear end to the front end (see arrow 110 in FIG. 7).

Since the stay 78a that supports the contact member 78b is attached to the rotor support portion 49c, the support portion 49 and the leveling rotor 70 rotate downward around the axis AX1 as the seedling planting portion 40 rises ( (See arrow 112 in FIG. 7). That is, since the leveling rotor 70 moves away from the lower link 54, the contact portion 78 can prevent the leveling rotor 70 and the elevating link 51 from interfering with each other. Further, the support portion 49 and the leveling rotor 70 are restricted from moving forward by the contact portion 78. Therefore, it is possible to avoid a situation in which the leveling rotor 70 interferes with the rear wheel 5 and the elevating link 51 due to the front-back sway when the seedling planting unit 40 moves up and down. Further, since the stay 78a is provided on the rotor support portion 49c, the support portion 49 can support the grounding rotor 70 and the contact portion 78, and the structure can be simplified and the cost can be reduced. The contact member 78b is preferably a rotating member pivotally supported by the stay 78a. As a result, the resistance of movement of the contact member 78b in a state of contact with the lower link 54 can be reduced, and the hydraulic lifting cylinder 56 (see FIG. 1) can be downsized.

<Planting depth adjustment mechanism>
The seedling transplanting machine 1 according to the present embodiment includes a planting depth adjusting mechanism 60 that adjusts the planting depth of seedlings by changing the height of the float 61. The planting depth adjusting mechanism 60 works in conjunction with the vertical adjusting mechanism 80 of the leveling rotor 70 to change the vertical position of the leveling rotor 70 according to the planting depth of the seedlings. Specifically, when the planting depth of seedlings is deep, the leveling rotor 70 is positioned downward, and when the planting depth of seedlings is shallow, the leveling rotor 70 is moved upward. The details of this point will be described below with reference to FIG. FIG. 8 is a schematic side view of the planting depth adjusting mechanism 60. Note that, in FIG. 8, the bottom surface of the float 61 when it moves downward is indicated by a dotted line.

As shown in FIG. 8, the planting depth adjusting mechanism 60 includes a lever 201, a slide portion 202, a rod 203, and an arm 204. The lever 201 is an input unit to the planting depth adjusting mechanism 60, and when the operator operates the lever 201, the float 61 moves vertically with respect to the seedling planting unit 40. In the present embodiment, when the lever 201 moves rearward (see arrow 114 in FIG. 8), the float 61 moves downward (see arrow 117 in FIG. 8) and the planting depth of seedlings becomes shallow, so that the lever 201 moves. The case where the float 61 moves upward when it moves forward (see the arrow 116 in FIG. 8) is shown as an example.

The slide portion 202 is fixed to the frame 64 and supports the lever 201 so as to be movable in the front-rear direction. The rod 203 rotatably connects the lever 201 and the arm 204 in front of the stopper arm 82. The rod 203 may be connected to the lever 201 by, for example, a bracket protruding forward from the base of the lever 201, as shown in FIG.

The arm 204 is supported by a bracket (not shown) protruding forward from the frame 64, for example, so as to be rotatable about an axis AX5 substantially parallel to the left-right direction. Further, the arm 204 and the stopper arm 82 are rotatably connected behind an axis AX5 about an axis AX6 that is substantially parallel to the left-right direction. That is, the lever 201, the arm 204, and the stopper arm 82 form a rotary link mechanism. As described above, the planting depth adjusting mechanism 60 and the vertical adjusting mechanism 80 of the ground leveling rotor 70 are connected via the so-called rotary link mechanism. Hereinafter, the details of the operation of the vertical adjustment mechanism 80 that moves in conjunction with the planting depth adjusting mechanism 60 will be described by taking the case where the planting depth of seedlings is changed to a shallower one as an example.

As shown in FIG. 8, when the lever 201 moves backward (see arrow 114 in FIG. 8), the float 61 moves downward with respect to the seedling planting section 40 (see arrow 117 in FIG. 8). The depth of attachment becomes shallow. Further, the rod 203 moves up by the rearward movement of the lever 201, and one end of the arm 204 pivots upward around the axis AX5 (see arrow 118 in FIG. 8). On the other hand, the other end of the arm 204 rotates downward around the axis AX6 (see arrow 120 in FIG. 8).

Since the arm 204 is rotatably connected to the stopper arm 82 on the other end side that extends beyond the axis AX5, the stopper arm 82 rotates around the axis AX3 as the arm 204 rotates about the axis AX5. (See the arrow 122 in FIG. 8) and pushes the support portion 49 downward via the protrusion 81a. As a result, the leveling rotor 70 moves downward (see arrow 124 in FIG. 8 ). In addition, when changing the planting depth of seedlings to a deeper one, the lever 201, the rod 203, and the support part 49 move in the opposite direction to the case where the planting depth of seedlings is changed to a shallower one. The grounding rotor 70 moves upward due to the rotation.

Here, in the past, the float may not be interlocked with the ground leveling rotor. In such a case, the operator needs to adjust the height of the ground leveling rotor separately from the planting depth, which may make the operation troublesome. Further, since the planting depth of the seedlings and the height of the leveling rotor are not linked, there is a possibility that the ground work is performed in a state where the height of the leveling rotor is not appropriate for the planting depth of the seedlings. Specifically, if the leveling rotor is higher than the float by a predetermined value or more, for example, the leveling rotor may be located above the upper surface of the field, and thus the leveling may not be properly performed. Further, when the leveling rotor is lower than the float by a predetermined value or more, for example, the leveling rotor may sneak into the field, and may damage the field.

However, according to the planting depth adjusting mechanism 60 of the seedling transplanting machine 1 according to the present embodiment, the float 61 and the leveling rotor 70 can be moved up and down in conjunction with each other. Therefore, if the planting depth of the seedling is set, the height of the leveling rotor 70 is also set, so that workability can be improved. Further, since the float 61 and the leveling rotor 70 are interlocked with each other, it is possible to avoid a situation where ground work is performed in a state in which the height of the leveling rotor 70 with respect to the planting depth of the seedling is not appropriate, and to improve work efficiency.

<Togetsu handle and emergency stop switch>
At the center of the front end of the traveling vehicle body 2, a ridge handle 300 (see FIGS. 1 and 2) is provided. An emergency stop switch 302 (see FIG. 2) is provided on the side of the ridge handle 300. The ridge handle 300 is, for example, a handle having a loop shape in a front view, and an operator standing in a front field scene of the traveling vehicle body 2 can hold it by hand and push it down to prevent the traveling vehicle body body 2 from floating. it can. Further, the ridge handle 300 is provided so as to be rotatable in the vertical direction (see the arrow 126 in FIG. 1), and when the ridge handle 300 is pushed downward, the traveling vehicle body 2 moves at a predetermined speed. Is composed of. Further, when the emergency stop switch 302 is operated, the driving of the engine 10 is stopped. Therefore, with the ridge handle 300 and the emergency stop switch 302, the traveling vehicle body 2 can safely perform the ridge crossing, the movement operation when the seedling transplanter 1 is unloaded on the trailer, and the like.

Here, when the driving of the engine 10 is stopped by the emergency stop switch 302, the engine 10 will not restart unless the release operation is performed. Further, the releasing operation includes an operation of depressing the clutch pedal 304 (see FIG. 2). Details of this point will be described below with reference to FIG. 9. FIG. 9 is a diagram illustrating an example of a release operation of the emergency stop switch 302.

As shown in FIG. 9, the emergency stop switch 302 switches between “operation (that is, a drivable state)” and “stop” of the engine 10 by rotating about a predetermined axis (see arrow 128 in FIG. 9). .. The emergency stop switch 302 has, for example, a connecting portion 302a provided so as to project in the radial direction of the shaft, and the connecting portion 302a and the clutch pedal 304 are connected by a wire 306. Here, the length of the wire 306 is determined so as to have a predetermined slack when the emergency stop switch 302 is in the “driving” position and the clutch pedal 304 is not depressed.

Here, when the emergency stop switch 302 is switched from "drive" to "stop" (see the arrow 131 in FIG. 9), the wire 306 is pulled by the rotating connecting portion 302a in the direction to reduce the slack. (See arrow 132 in FIG. 9). Here, it is preferable that the length of the wire 306 be fully extended when the emergency stop switch 302 is in the “stop” position and the clutch pedal 304 is not depressed.

Further, when the clutch pedal 304 is depressed (see arrow 134 in FIG. 9), the wire 306 is pulled in the direction in which the emergency stop switch 302 is switched from “stop” to “driving” (see arrow 136 in FIG. 9). The "stop" state of the emergency stop switch 302 is released (see arrow 139 in FIG. 9). The emergency stop switch 302 can be switched from “stop” to “driving” by an operator operating the emergency stop switch 302.

As described above, the emergency stop switch 302 included in the seedling transplanter 1 according to the present embodiment includes the operation of releasing the “stop” state as a part of the starting operation of the engine 10, such as the operation of depressing the clutch pedal 304. I decided. Therefore, it is possible to avoid a situation in which the worker forgets to release the “stop” state of the emergency stop switch 302 to start the engine 10 and improve workability. In the starting operation of the engine 10 described above, when the engine 10 is a recoil starter type, the "stop" state of the emergency stop switch 302 is released by using the power when the operator pulls the recoil rope. It may be that.

For example, as shown in FIG. 13, a guide 314 that guides the recoil rope 312 is movable in a direction (see arrows 148a and 148b in FIG. 13) intersecting the pulling direction of the recoil rope 312 (see arrow 148c in FIG. 13). Then, the emergency stop switch 302 may be operated via the wire 306a by pulling the guide 314. Specifically, as shown in FIG. 13, one end of the wire 306a is connected to the guide 314 and the other end is connected to the emergency stop switch 302. When the recoil rope 312 is pulled (see the arrow 148c in FIG. 13), the wire 306a is pulled along with the movement of the guide 314 (see the arrow 148d in FIG. 13). This enables the emergency stop switch 302 to be operated by the wire 306a. Even in this case, the emergency stop switch 302 can include the operation of releasing the “stop” state as a part of the operation of starting the engine 10.

Further, the emergency stop switch 302 included in the seedling transplanter 1 according to the present embodiment enables the speed of the traveling vehicle body 2 to be arbitrarily adjusted by interlocking with the ridge handle 300 and the speed change lever 35, thereby improving workability. ing. Details of this point will be described below with reference to FIGS. 10 and 11. FIG. 10 is a schematic side view of a connecting portion 308 between the shift lever 35 and the ridge pull handle 300, and FIG. 11 is a schematic top view of a gate 310 of the shift lever 35. In addition, in FIG. 10, when the shift lever 35 is operated to the forward side, the ridge handle 300, the shift lever 35, and the connecting portion 308 are indicated by dotted lines, and the spare seedling stand 130 and the like are omitted. Further, in FIG. 11, the support column of the shift lever 35 is indicated by a dotted line.

When the shift lever 35 moves forward with respect to the neutral position 138 in the front-rear direction (see arrow 140 in FIG. 10 ), the traveling vehicle body 2 moves forward, and when it moves backward (see arrow 142 in FIG. 10 ), the traveling vehicle body 2 moves. 2 retreats. In addition, as the traveling distance from the neutral position 138 increases in both forward and backward movements of the traveling vehicle body 2, the speed of the traveling vehicle body 2 increases.

Further, the speed change lever 35 and the ridge handle 300 are connected by the connecting portion 308. Therefore, the forward speed of the traveling vehicle body 2 increases as the distance (that is, the angle θ shown in FIG. 10) in which the ridge pulling handle 300 is pushed downward increases.

Further, as shown in FIG. 11, the shift lever 35 moves along a gate 310 (that is, a groove) provided in the control unit 30. The gate 310 has a shape in which a forward gate 310a and a reverse gate 310b, which are provided in the front-rear direction of the traveling vehicle body 2, are connected by a neutral gate 310c extending in the left-right direction. That is, when the speed change lever 35 is located at the forward movement gate 310a, the traveling vehicle body 2 moves forward, and when the speed change lever 35 is positioned at the backward movement gate 310b, the traveling vehicle body 2 moves backward. Further, when the shift lever 35 is located at the neutral gate 310c (that is, above the neutral position 138), the traveling vehicle body 2 stops. According to the shape of the gate 310, when the operator pushes back the ridge pulling handle 300 (see arrow 144 in FIG. 11 ), the speed change lever 35 comes into contact with the wall portion 310 d of the neutral gate 310 c and stops. The vehicle body 2 stops.

As described above, in the gate 310 of the seedling transplanter 1 according to the present embodiment, the forward gate 310a and the backward gate 310b are separated in the left-right direction of the traveling vehicle body 2. This makes it possible to prevent the traveling vehicle body 2 from changing its moving direction from forward to backward (or backward to forward) by the ridge handle 300. Therefore, even if the worker feels dangerous and pushes back the ridge handle 300, the traveling vehicle body 2 is stopped, so that the safety can be improved.

It should be noted that if the pushing amount (for example, the rotation angle) of the ridge moving handle 300 is regulated and the moving amount of the speed change lever 35 by the ridge operating handle 300 is set smaller than the length of the forward gate 310a in the front-rear direction, the traveling vehicle body Two speeds are regulated. Therefore, it is possible to avoid a situation in which the speed of the traveling vehicle body 2 becomes unnecessarily high while the operator is operating the ridge pulling handle 300, and it is possible to improve safety. In FIG. 11, the front end of the movement range of the speed change lever 35 that is moved by the ridge handle 300 when the pressing amount is thus restricted is shown as the restriction position 146. In this case, the connecting portion 308 may be removably provided on the ridge pull handle 300, and when the ridge handle 300 is used, the worker may attach the connecting portion 308 to the ridge pull handle 300. In this case, if the connecting portion 308 is detached from the ridge pull handle 300, it is possible to avoid a situation where the movement range of the speed change lever 35 is restricted to the movement range of the ridge pull handle 300.

The connecting portion 308 may have, for example, a damper that is expandable/contractible in the stretching direction. In this case, since the connecting portion 308 extends when the ridge handle 300 is pushed down, the movement amount of the speed change lever 35 becomes smaller than when the connecting portion 308 does not expand and contract, and the speed of the traveling vehicle body 2 becomes higher than necessary. It is possible to avoid. Therefore, safety can be improved.

Further, the connecting portion 308 may be provided so as to be expandable and contractable in the stretching direction, and further, a lock for restricting such expansion and contraction may be provided. In this case, when the operator operates the shift lever 35, the lock is released, and when the ridge handle 300 is operated, the extension of the connecting portion 308 is restricted by the lock. Good. Even in this case, when the shift lever 35 is operated, it is possible to avoid a situation in which the shift range of the shift lever 35 is restricted to the shift range of the ridge handle 300.

Further, if the connection portion 308 is provided with a relief when the speed change lever 35 is located at the retreat gate 310b, the speed change lever 35 and the ridge handle 300 are connected when the traveling vehicle body 2 moves forward and the vehicle moves backward. In some cases, such connection can be released. The details of this point will be described below with reference to FIG. FIG. 12 is a schematic diagram showing a modified example of the connecting portion 308.

As shown in FIG. 12, the connecting portion 308a according to the modified example includes a transmitting portion 308b, a fixing portion 308c, and a restricting portion 308d. The transmission portion 308b is, for example, a shaft, and the front end is connected to the ridge handle 300. The fixing portion 308c is fixed to, for example, the main frame 7 (see FIG. 1) and supports the transmission portion 308b so as to be movable in the extending direction of the transmission portion 308b. The restriction portion 308d is, for example, a plate-shaped member, and has a guide groove 308f having substantially the same shape as the retreat gate 310b and the neutral gate 310c in a top view. The shift lever 35 is inserted into the guide groove 308f.

Here, when the ridge handle 300 is pushed down or pushed back, the speed change lever 35 advances and retracts the forward movement gate 310a by the wall portion 308e in the front-rear direction of the guide groove 308f. On the other hand, when the shift lever 35 moves back and forth through the retreat gate 310b, the movement of the shift lever 35 is not transmitted to the ridge handle 300 by the guide groove 308f. Thus, the connecting portion 308a according to the modification can prevent the ridge handle 300 from moving rearward when the traveling vehicle body 2 moves backward. Therefore, it is possible to reduce the dead space due to the rotation of the ridge handle 300 and increase the space efficiency of the machine body. Therefore, the front end of the seedling transplanter 1 can be made compact.

When part of the shift lever 35 extends inside the front cover 31, the connecting point of the shift lever 35 with the connecting portion 308 or the connecting portion 308a may be housed inside the front cover 31. In this case, an insertion hole may be formed in the front cover 31, and the connecting portion 308 and the transmission portion 308b may be inserted into the insertion hole. As a result, a part of the connecting portion 308 and a part of the connecting portion 308a (that is, a part of the transmitting portion 308b, the fixing portion 308c, and the restricting portion 308d) are covered with the front cover 31. Therefore, the appearance of the seedling transplanting machine 1 can be improved.

As described above, the seedling transplanting machine according to one aspect of the embodiment has a traveling vehicle body that travels in the field with traveling wheels provided on the left and right sides, and a seedling planting planting seedlings loaded on the rear part of the traveling vehicle body in the field. Part, a ground leveling device that is arranged below the seedling planting part and level the field scene, and a support part that supports the ground leveling device while extending forward between the bottom part of the seedling planting part and the field. Prepare

Thereby, for example, it is not necessary to provide a support part of the ground leveling device between the traveling vehicle body and the seedling planting portion, and the seedling planting portion can be arranged close to the traveling vehicle body. Therefore, the seedling transplanter can be made compact by shortening the entire length of the body of the seedling transplanter.

Further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1 seedling transplanter 2 traveling vehicle 4 front wheel 5 rear wheel 7 main frame 10 engine 11 engine cover 15 power transmission mechanism 16 hydraulic continuously variable transmission 17 belt type power transmission mechanism 18 mission case 21 front wheel final case 22 rear wheel gear case 26 Floor step 27 Rear step 28 Pilot seat 30 Control part 31 Front cover 35 Shift lever 40 Seedling planting part 41 Planting device 42 Planting claw 45 Seedling placement part 48 Planting part support pipe 48a Shaft 49 Support part 49a Stay support part 49b Rotor stay 49c Rotor support portion 50 Seedling plant raising/lowering mechanism 51 Lifting link 52 Link member 53 Upper link 54 Lower link 61 Float 64 Frame 70 Leveling rotor 78 Contact portion 78a Stay 78b Contact member 80 Vertical adjustment mechanism 81 Stay 81a Projecting portion 82 Stopper arm 83 Rod 84 Handle 85 Slide 138 Neutral position 146 Restricted position 201 Lever 202 Sliding part 203 Rod 204 Arm 300 Energized handle 302 Emergency stop switch 302a Connection part 304 Clutch pedal 306, 306a Wire 308, 308a Connection part 308b Transmission part 308c Fixed part 308d Restriction part 308e Wall part 308f Guide groove 310 Gate 310a Forward gate 310b Backward gate 310c Neutral gate 310d Wall part 312 Recoil rope 314 Guide

Claims (8)

A traveling car body that travels in the field with traveling wheels provided on both left and right sides,
A seedling planting section for planting seedlings loaded on the rear part of the traveling vehicle body in a field,
A land leveling device that is disposed below the seedling planting section and leveles the field scene,
A support portion that supports the ground leveling device while extending forward between the bottom portion of the seedling planting portion and the field ,
A link member, the rear end side of which is connected to the seedling planting portion to support the seedling planting portion in a vertically movable manner,
A stay projecting upward from the support portion,
A contact member provided at the upper end of the stay,
A pillar protruding upward from the support portion,
An abutting member provided at the upper end of the pillar,
A stopper arm, one end of which is axially supported by the seedling planting portion and is pivotally provided in the vertical direction,
A handle capable of rotating the stopper arm to fix the stopper arm at a predetermined position;
A biasing member that biases the contact member toward the stopper arm;
Equipped with
The ground leveling device,
A leveling rotor rotating about a first axis of rotation;
The support portion is
A second rotation shaft that is substantially parallel to the first rotation shaft, supports the soil leveling rotor rotatably in the vertical direction,
The second rotation axis is
It is located at a position lower than the upper end and higher than the lower end of the moving range of the first rotating shaft,
The stay is
When the seedling planting portion is further raised from the state where the contact member is in contact with the link member, the ground leveling rotor is pushed downward together with the support portion around the second rotation axis,
The handle is
The seedling transplanter characterized in that when the stopper arm is rotated downward, the leveling rotor is pushed downward together with the support portion around the second rotation axis . The handle is
A position where the upper end of the handle is higher than the link member by rotating the stopper arm via a rod that is provided between the traveling vehicle body and the seedling planting portion and is connected to the other end of the stopper arm. The seedling transplanting machine according to claim 1 , wherein The handle is
A substantially L-shaped plate that has a horizontal portion to which the rod is connected at the tip, and a vertical portion that extends upward from the rear end of the horizontal portion, and the vicinity of the corner is rotatably attached by a spindle. The seedling transplanter according to claim 2 , wherein the seedling transplanter has a shape and is provided so that the vertical portion can be rotated in the left-right direction. Arranged at the bottom of the seedling planting section, a float that glides over the field to level it,
A planting depth adjusting mechanism that changes the planting depth of the seedling by vertically displacing the float with respect to the planting unit.
A planting depth adjusting lever that displaces the float in the planting depth adjusting mechanism by a rotating operation around a support shaft;
An arm that is connected to the stopper arm, forms a rotation link mechanism together with the planting depth adjusting lever and the stopper arm, and rotates the stopper arm in the vertical direction by rotating the planting depth adjusting lever. Further preparation,
The stopper arm is
When the planting depth adjusting lever is operated in a direction to move the float downward, the planting depth adjusting lever rotates downward and pushes the grounding rotor together with the support portion downward around the second rotation axis. The seedling transplanting machine according to any one of claims 1 to 3 . A ridge handle provided on the front part of the traveling vehicle body to move and operate the traveling vehicle body,
A switch that is provided in the vicinity of the ridge handle and stops the engine of the traveling vehicle body,
A wire that connects the switch and a clutch pedal of the traveling vehicle body and applies a pulling force to the switch by operating the clutch pedal;
The engine is
It is started including the operation of the clutch pedal,
The switch is
The seedling transplanter according to any one of claims 1 to 4 , wherein an operation state in which the engine is stopped is released by operating one of the switch and the clutch pedal. Further comprising a connecting portion for connecting the ridge handle and a speed change lever for operating the traveling speed and the forward/backward movement of the traveling vehicle body,
The shift lever is
By moving from the neutral position to stop the traveling vehicle body to the front, the traveling vehicle body is operated forward while increasing the speed as the shift lever is located in the front direction,
The ridge handle is
It can be pushed down while rotating forward,
The connecting portion is
The gear shift lever is located at the neutral position when the ridge pull handle is not operated, and the shift lever is moved forward and backward in conjunction with the rotation of the ridge pull handle. The seedling transplanter according to 5 . The seedling transplanter according to claim 6 , further comprising a restriction portion that restricts movement of the shift lever from the neutral position when the shift lever moves rearward by the ridge handle. The seedling according to claim 6 or 7 , further comprising a rotation restricting portion that restricts a forward movement amount of the shift lever that is moved by the ridge handle by regulating a rotation range of the ridge handle. Transplanter.

Images