JP2018166431A - Planting/seeding machine - Google Patents

Abstract

To provide a planting/seeding machine with a simplified configuration when a ground preparation device for preparing a ground surface of rice field is provided.SOLUTION: A work device 5 is supported to a link mechanism 3 connected to a rear part of a machine body in a vertically swinging manner, and a ground preparation device 53 is provided between the machine body and the work device 5 and is supported so as to be lifted and lowered from/to the work device 5 via a lifting mechanism 81, 83. An electric actuator 56 can freely drive the ground preparation device 53 so as to be lifted and lowered from/to a work position in which the device is in contact with the ground surface of rice field for ground preparation and a non-work position in which the device is upwardly lifted apart from the ground surface. A work operation part 120 for operating the electric actuator 56 is mounted on the work device 5 so as to lift and lower the ground preparation device 53 from/to the work position and non-work position by a human operation.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a planting system working machine provided with a leveling device for leveling a paddy field in a planting system working machine provided with a working device such as a seedling planting device or a seeding device at the rear part of the machine body.

In the riding type rice transplanter which is an example of the planting work machine, as disclosed in Patent Document 1, the leveling device is supported by the seedling planting device so as to be positioned between the machine body and the seedling planting device. There is a riding type rice transplanter.
The ground leveling device of Patent Document 1 includes a drive shaft that is supported and rotated in the left-right direction, and a leveling body that is attached to the drive shaft and rotates integrally with the drive shaft. Thus, the surface is leveled by rotating the drive shaft and the leveling body. Thereby, seedling planting is performed by the seedling planting device while the leveling of the surface is performed by the leveling device.

  In Patent Document 1, the leveling device is supported by the seedling planting device via an elevating mechanism so as to be movable up and down, and an electric motor that drives the leveling device to move up and down is provided in the working device, and the height of the leveling device is changed by the electric motor. It is configured to be able to. As a result, the height of the leveling device can be adjusted in conjunction with the working condition of the seedling planting device, such as adjusting the leveling level by the leveling device or raising the leveling device to a non-working position away from the surface. Can be set appropriately.

JP 2011-2000156 A (see FIGS. 7 and 8)

In Patent Document 1, an operation switch for operating an electric motor is provided in the airframe, and a driver on the airframe operates the operation switch.
In this case, since it is necessary to arrange a long harness across the operation switch of the machine body and the electric motor of the leveling device, there is room for improvement in terms of simplification of the structure.
An object of the present invention is to simplify the structure of a planting work machine provided with a leveling device for leveling a field surface.

Planting work machine of the present invention,
The work device is supported by a link mechanism connected to the rear part of the machine body so as to be swingable up and down.
A leveling device having a drive shaft that is supported and rotated in the left-right direction, and a leveling body that is attached to the drive shaft and rotates integrally with the drive shaft;
The leveling device is supported by the work device via an elevating mechanism so as to be movable up and down so as to be positioned between the machine body and the work device,
An electric actuator that drives the leveling device to move up and down is provided, and the electric actuator drives the leveling device to move up and down to a working position where the leveling device is grounded and leveled the surface, and to a non-working position away from the surface. Is free
An operation operation unit that operates the electric actuator is attached to the work device so that the leveling device moves up and down to the work position and the non-work position by being manually operated.

  According to the present invention, the leveling device is supported by the work device through the lifting mechanism so as to be movable up and down so as to be positioned between the machine body and the work device, and the work position and the surface of the ground surface are grounded by grounding the field surface. The leveling device can be driven up and down by an electric actuator to a non-working position away from the top.

  In this case, according to the present invention, since the operation operation unit for operating the electric actuator is attached to the work device, the operation operation unit attached to the work device, and the leveling device and the electric actuator supported by the work device are provided. , Will be close to each other. As a result, the harness extending between the operating portion and the electric actuator becomes short, which is advantageous in terms of simplification of the structure.

In the present invention,
A leveling depth operation unit that operates the electric actuator so as to change the leveling depth of the leveling device at the work position to a deep side and a shallow side by being artificially operated is provided in the work device. Preferably it is attached.

  As described above, in addition to the function of raising and lowering the leveling device to the working position and the non-working position, there may be a function of operating the electric actuator so as to change the leveling depth of the leveling device at the working position. .

  According to the present invention, since the leveling depth operation unit that operates the electric actuator so as to change the leveling depth of the leveling device at the work position is attached to the work unit, the leveling depth operation unit, the leveling device, and The electric actuators are close to each other. As a result, the harness extending over the leveling depth operation section and the electric actuator becomes short, which is advantageous in terms of simplification of the structure.

In the present invention,
The working device includes a seedling platform on which seedlings are placed and driven laterally in a lateral direction, a vertical feeding mechanism that is provided on the seedling platform and feeds the seedlings on the seedling platform, and the seedlings. It is a seedling planting device having a planting arm that takes out seedlings from the bottom of the platform and plantes them on the rice field,
It is preferable that the operation operation unit and the leveling depth operation unit are attached to an upper portion of the vertical feed mechanism in the work device.

When the working device is a seedling planting device including a seedling platform, a vertical feed mechanism, and a planting arm, mud and water splashed off from the rice field often adhere to each part of the working device.
According to the present invention, since the operation operation unit and the leveling depth operation unit are arranged at a high position from the surface, that is, the upper part of the vertical feed mechanism in the work apparatus, mud and water splashed from the surface are operated. Part and leveling depth operation part are hard to adhere. Thereby, in an operation operation part and a leveling depth operation part, the failure by adhesion of mud and water can be decreased.

In the present invention,
A mudguard cover is provided on the front side of the vertical feed mechanism,
The upper end of the mudguard cover is located above the upper end of the vertical feed mechanism,
It is preferable that the operation operation portion and the leveling depth operation portion are attached to a portion above the upper end portion of the mudguard cover in the work device.

When traveling on a paddy field, mud and water are splashed rearward by the wheels of the airframe and adhere to the work device, so that a mudguard cover may be provided on the front side of the vertical feed mechanism.
According to the present invention, the mudguard cover is configured to be sufficiently large so that the upper end portion of the mudguard cover is located above the upper end portion of the vertical feed mechanism, and the operation operation unit and the leveling depth operation unit are operated. By attaching the upper part of the mudguard cover in the apparatus to the upper part, the operation operation part and the leveling depth operation part can be arranged at a sufficiently high position. Thereby, in an operation operation part and a leveling depth operation part, the failure by adhesion of mud and water can be decreased.

In the present invention,
A horizontal frame that supports the upper part of the seedling platform is provided along the left-right direction above the upper end of the mudguard cover,
It is preferable that the operation operation unit and the leveling depth operation unit are attached to the horizontal frame.

As described above, when the working device is a seedling planting device, a horizontal frame that supports the upper portion of the seedling placing table may be provided along the left-right direction.
According to the present invention, the horizontal frame is provided so as to be positioned above the upper end of the mudguard cover, and the operation operation unit and the leveling depth operation unit are attached to the horizontal frame, whereby the operation operation unit and the leveling depth are provided. The operation unit can be arranged at a sufficiently high position.
As a result, malfunctions due to adhesion of mud and water can be reduced in the operation operation unit and the leveling depth operation unit, and the operation operation unit and the leveling depth can be effectively utilized by using an existing member called a horizontal frame. The structure which arrange | positions an operation part in a high position can be obtained easily.

In the present invention,
A control unit for operating the electric actuator based on operation signals of the operation operation unit and the leveling depth operation unit;
It is preferable that the operation operation unit, the leveling depth operation unit, and the control unit are attached to the same side portion on the right side or the left side of the link mechanism in the work device.

  In addition to the operation operation unit and the leveling depth operation unit, in the case of including a control unit that operates the electric actuator based on the operation signals of the operation operation unit and the leveling depth operation unit, according to the present invention, the operation operation unit and the leveling operation Since the depth operation unit and the control unit are attached to the right side or the left side of the link mechanism in the work device, the operation operation unit, the leveling depth operation unit, and the control unit are close to each other. Become. As a result, the harness extending over the operation operation unit, the leveling depth operation unit, and the control unit becomes short, which is advantageous in terms of simplification of the structure.

In the present invention,
It is preferable that the control unit has a coupler for connecting to a power supply unit provided in the aircraft.

  According to the present invention, it is possible to easily obtain a state in which electric power for operating the electric actuator is obtained from the airframe by connecting the power supply unit provided in the airframe and the coupler of the control unit.

It is a whole side view of a riding type rice transplanter. It is a top view of the vicinity of a seedling planting device and a fertilizer application device. It is a side view of a seedling planting device and a leveling device. It is a top view of a seedling planting device and a leveling device. It is a front view of a seedling planting device and a leveling device. It is a front view of the vicinity of the control device of the leveling device and the operation box. It is a side view of the vicinity of a center float and a sensing mechanism. It is a side view which shows the positional relationship of a sensing mechanism and a leveling apparatus. It is a front view of the vicinity of a sensing mechanism. It is a cross-sectional plan view near the leveling transmission case in the leveling device. It is a cross-sectional plan view near the leveling support arm in the leveling device. It is a side view which shows the raising / lowering structure of a leveling apparatus. It is a side view of the vicinity of a set depth sensor. It is a figure which shows the connection state of the control apparatus with which the body was equipped, and each part. It is a figure which shows the cooperation state of the control apparatus of a leveling apparatus, and each part.

  The riding type rice transplanter which is an example of a planting type working machine is shown by FIGS. 1 to 15, F indicates the “forward direction” of the aircraft, B indicates the “rear direction” of the aircraft, U indicates the “upward direction” of the aircraft, and D indicates the “downward direction” of the aircraft. ing. R indicates the “right direction” of the aircraft, and L indicates the “left direction” of the aircraft.

(Overall configuration of riding rice transplanter)
As shown in FIGS. 1 and 2, in a riding type rice transplanter, a link mechanism 3 is connected to a rear portion of a machine body K having right and left front wheels 1 and right and left rear wheels 2 so as to be swingable up and down. A six-row seedling planting device 5 (corresponding to a working device) is supported at the rear of the link mechanism 3 and is provided with a hydraulic cylinder 4 that drives the link mechanism 3 up and down.

  As shown in FIGS. 1, 2, and 3, the leveling device 53 is disposed over the right and left portions of the seedling planting device 5 so as to be positioned between the machine body K and the seedling planting device 5. The seedling planting device 5 supports the seedling planting device 5 so as to freely move up and down.

(Seedling planting equipment)
As shown in FIGS. 1, 2, and 3, the seedling planting device 5 includes one feed case 17, three planting transmission cases 6, and a rotating case rotatably supported at the rear of the planting transmission case 6. 7, planting arms 8 provided at both ends of the rotating case 7, center float 9 and side float 11 supported on the lower part of the seedling planting device 5 so as to be movable up and down, and seedlings provided with six seedling placement surfaces A vertical feed mechanism 25 provided on each of the base 10 and the seedling setting surface of the seedling setting base 10 is provided.

  As shown in FIGS. 3 and 4, a feed case 17 and a planting transmission case 6 are connected to a support frame 18 arranged in the left-right direction, and the planting transmission case 6 extends rearward from the support frame 18. Has been issued. The feed case 17 is supported so as to be able to roll around a front and rear axis P1 (see FIG. 5) at the lower rear portion of the link mechanism 3.

  As shown in FIG. 4, the lateral feed shaft 19 extends from the feed case 17, and the end of the lateral feed shaft 19 is supported by the support frame 18 via the bracket 20. A feed member 21 that is driven to reciprocate laterally as the transverse feed shaft 19 rotates is fitted on the transverse feed shaft 19, and the feed member 21 is connected to the seedling table 10.

As shown in FIGS. 2, 3, and 4, a guide rail 38 is supported in the left-right direction by the planting transmission case 6, and a lower portion of the seedling support 10 is supported along the guide rail 38 so as to be laterally movable.
As shown in FIGS. 4, 5, and 6, a vertical frame 26 is connected to the right end portion and the left end portion of the support frame 18 so as to extend upward, and the horizontal frame 50 extends over the upper portion of the vertical frame 26. It is connected. A guide rail 27 is connected to the front surface of the upper part of the seedling platform 10, and the guide rail 27 is supported by a roller 51 provided in the horizontal frame 50 so as to be laterally movable.

  As shown in FIGS. 2 to 6, the lower portion of the seedling platform 10 is supported by the guide rail 38, and the upper portion of the seedling platform 10 is supported by the horizontal frame 50, so that the seedling platform 10 is connected to the guide rail 38 and the lateral side. A reciprocating lateral feed drive is performed left and right along the frame 50.

  As shown in FIGS. 2 to 5, a guard member 113 is bolted to the right end portion and the left end portion of the support frame 18. The guard member 113 extends outward from the support frame 18 and is bent rearward.

  As shown in FIGS. 2 to 5, the rear portion of the right guard member 113 is positioned near the outside of the right end portion of the guide rail 38, and the rear portion of the left guard member 113 is positioned near the outside of the left end portion of the guide rail 38. The right end portion and the left end portion of the guide rail 38 are protected by the guard member 113.

  As shown in FIGS. 2 and 3, a belt-type vertical feed mechanism 25 is provided on each of the six seedling setting surfaces of the seedling setting table 10. As shown in FIG. 4, the vertical feed shaft 36 extends from the feed case 17, and the end of the vertical feed shaft 36 is supported by the support frame 18 via a bracket 37. A longitudinal feed shaft 36 is rotationally driven by the power of an input shaft 28 described later, and a pair of drive arms 36 a are connected to the longitudinal feed shaft 36.

  As shown in FIG. 4, an input portion (not shown) for transmitting power to the six vertical feed mechanisms 25 is provided in the seedling platform 10, and the input portion is between the drive arms 36 a of the vertical feed shaft 36. Is arranged. When the seedling table 10 reaches the right end or the left end of the reciprocating lateral feed drive, the input unit reaches one drive arm 36a of the vertical feed shaft 36, and the input unit is moved by one drive arm 36a of the vertical feed shaft 36. Driven, the six vertical feed mechanisms 25 operate for a predetermined stroke, and the seedlings on the seedling table 10 are sent downward.

(Fertilizer)
As shown in FIGS. 1, 2, and 3, a hopper 12 for storing fertilizer and three feeding portions 13 corresponding to two planting strips are provided on the rear side of the driver seat 31 in the airframe K. A blower 14 is provided on the left side of the feeding portion 13.

  As shown in FIGS. 1, 2, and 3, two groove forming devices 15 are connected to the center float 9 and the side float 11, and six groove forming devices 15 are provided. Six hoses 16 are connected across the vessel 15.

(Transmission structure to front and rear wheels, seedling planting device, fertilizer application)
As shown in FIG. 1, an engine 49 is supported at the front of the body K. The power of the engine 49 is transmitted from the hydrostatic continuously variable transmission (not shown) to the front wheels 1 and the rear wheels 2 via a gear transmission type auxiliary transmission (not shown).

  As shown in FIGS. 1 and 4, the power branched from between the hydrostatic continuously variable transmission and the sub-transmission is generated by a stock transmission (not shown), a planting clutch 44 (see FIG. 14), and a PTO. It is transmitted to the input shaft 28 provided in the feed case 17 through the shaft 22.

  As shown in FIG. 4, the power of the input shaft 28 is transmitted to the vertical feed shaft 36, the vertical feed shaft 36 is rotationally driven, and the power of the input shaft 28 is transmitted through the lateral feed speed change mechanism 29. Then, the transverse feed shaft 19 is driven to rotate. The power of the input shaft 28 is transmitted to the transmission chain 30, the transmission shaft 23 installed over the planting transmission case 6, and the planting transmission shaft 32 provided in the planting transmission case 6.

  As shown in FIG. 4, the power of the planting transmission shaft 32 is transmitted to the rotary case 7 via the torque limiter 33, the transmission chain 34, the small number of clutches 24, and the planting drive shaft 35. A cylindrical transmission shaft cover 60 is connected over the planting transmission case 6, and the transmission shaft 23 is covered with the transmission shaft cover 60.

  As shown in FIGS. 1, 2, and 3, when the planting clutch 44 is operated in the transmission state, the rotary case 7 is rotationally driven as the seedling setting table 10 is reciprocally driven laterally to the left and right. The planting arms 8 alternately take out the seedlings from the bottom of the seedling platform 10 and plant them on the rice field G. When the seedling platform 10 reaches the right end or the left end of the reciprocating lateral feed drive, the seedlings on the seedling platform 10 are sent downward by the six vertical feeding mechanisms 25. When the planting clutch 44 is operated in the disengaged state, the seedling table 10, the rotating case 7, and the vertical feed mechanism 25 are stopped.

  As shown in FIGS. 1, 2, and 3, in the fertilizer application, the power of the auxiliary transmission is transmitted to the feeding unit 13 via the fertilizer clutch 45 (see FIG. 14). When the fertilizer clutch 45 is operated in the transmission state, the fertilizer is fed out from the hopper 12 by a predetermined amount by the feeding unit 13, and the fertilizer is supplied to the grooving device 15 through the hose 16 by the blower 14. Fertilizer is supplied to the rice field G via the vessel 15. When the fertilizer application clutch 45 is operated in the disconnected state, the feeding unit 13 stops.

(Raising / lowering structure of seedling planting device by lifting / lowering operation lever)
The raising / lowering operation of the seedling planting device 5 by the raising / lowering operation lever 72 operated by the operator will be described as follows.

  As shown in FIGS. 2 and 14, an elevating operation lever 72 is provided on the right side of the driver's seat 31, and the elevating operation lever 72 can be operated in an ascending position, a neutral position, a descending position, and a planting position. The machine body K is provided with a machine operation type control valve 71 for supplying / discharging hydraulic oil to / from the hydraulic cylinder 4, and the elevating operation lever 72, the control valve 71, the planting clutch 44, and the fertilizer clutch 45 are linked to each other. 70 is mechanically connected.

  As shown in FIG. 14, when the elevating operation lever 72 is operated to the raised position, the neutral position, the lowered position, and the planting position, the control valve 71, the planting clutch 44, and the fertilizer clutch 45 are connected through the linkage mechanism 70 as follows. It is operated as follows.

  As shown in FIG. 14, when the elevating operation lever 72 is operated to the raised position, the planting clutch 44 and the fertilizer clutch 45 are operated to the disconnected state, the control valve 71 is operated to the raised position, and the hydraulic cylinder 4 is contracted. Then, the seedling planting device 5 rises.

As shown in FIG. 14, when the elevating operation lever 72 is operated to the neutral position, the planting clutch 44 and the fertilizer clutch 45 are operated to the disconnected state, the control valve 71 is operated to the neutral position, and the hydraulic cylinder 4 is stopped. The raising / lowering of the seedling planting device 5 stops.
As described above, when the seedling planting device 5 reaches the upper limit position of the link mechanism 3 with the lifting operation lever 72 operated to the raised position, the operation of the link mechanism 3 is performed via a feedback link (not shown). Then, it is transmitted to the elevating operation lever 72, and the elevating operation lever 72 is operated to the neutral position.

  As shown in FIG. 14, when the elevating operation lever 72 is operated to the lowered position, the planting clutch 44 and the fertilizer clutch 45 are operated to the disconnected state, the control valve 71 is operated to the lowered position, and the hydraulic cylinder 4 is extended. Then, the seedling planting device 5 is lowered.

  As described above, when the center float 9 is brought into contact with the rice field G in the state in which the elevating operation lever 72 is operated to the lowered position, as described in (Elevation control of seedling planting device) -1, 2 described later, The raising / lowering control of the planting device 5 is activated. Thereby, the control valve 71 and the hydraulic cylinder 4 are operated so that the seedling planting depth by the planting arm 8 is maintained at the set depth, and the seedling planting device 5 is automatically driven up and down. It becomes a state.

  As shown in FIG. 14, when the elevating operation lever 72 is operated to the planting position, the planting clutch 44 and the fertilizer application clutch 45 are in the state where the elevating control of the seedling planting device 5 is activated, similar to the above-described lowered position. Operated in transmission state.

(Structure of raising and lowering control of seedling planting device) -1
As described in (Elevation control of seedling planting device) -1 and 2 described later, the seedling planting device 5 is automatically operated so that the planting depth of the seedling by the planting arm 8 is maintained at the set depth. The structure for driving up and down automatically will be described in this section and (Structure of raising and lowering control of seedling planting device) -2 described later.

  As shown in FIGS. 2 and 7, a support shaft 41 is rotatably supported around a horizontal axis P <b> 4 in the left-right direction at the bottom of the planting transmission case 6, and a support arm 41 a connected to the support shaft 41 is provided. It is extended diagonally below the rear side. The rear portions of the center float 9 and the side float 11 are supported in a swingable manner around the horizontal axis P5 in the left-right direction at the rear portion of the support arm 41a.

  As shown in FIGS. 2 and 7, an artificially operable planting depth lever 42 is connected to the support shaft 41 and extends obliquely upward on the front side, and is connected to the support frame 18. A planting depth lever 42 is inserted into the guide 43.

2 and 7, the support arm 41a of the support shaft 41 is rotated by the planting depth lever 42 to change the position of the horizontal axis P5 (the center float 9 and the side float 11) up and down. By doing so, the planting depth of the seedling by the planting arm 8 (see (change of planting depth (set depth) of the seedling by the planting arm)) can be changed.
By engaging the planting depth lever 42 with the lever guide 43, the position of the horizontal axis P5 (center float 9 and side float 11) is fixed, and the set height A1 (set depth) (see FIG. 14). ) Can be set.

  As shown in FIGS. 7, 8, and 9, a support bracket 77 is connected to the upper portion of the center float 9 in the support frame 18. A support link 78 is swingably supported around the horizontal axis P6 in the left-right direction at the front portion of the support bracket 77, and a connecting rod 82 is connected between the lower portion of the support link 78 and the planting depth lever 42. Has been.

As shown in FIGS. 7, 8, and 9, a support link 79 is swingably supported on the upper portion of the support bracket 77, and a support member 80 is swingably connected to the upper portions of the support links 78 and 79.
Parallel links are formed by the support links 78, 79, and the support member 80 is translated parallel to the front diagonally lower side and the rear diagonally upper side by the linkage rod 82 in conjunction with the operation of the planting depth lever 42. The position of the support member 80 is determined by engaging the planting depth lever 42 with the lever guide 43.

(Structure of raising / lowering control of seedling planting device) -2
As shown in FIG. 14, a sensing mechanism 88 that mechanically takes out the vertical movement of the center float 9 relative to the seedling planting device 5 and transmits it to the control valve 71 is connected across the control valve 71 and the center float 9. Yes.

  The sensing mechanism 88 includes the support bracket 77, the support links 78 and 79, the support member 80, and the linkage rod 82 described in the above (Structure of raising and lowering control of seedling planting device) -1 as described below. In addition, a sensing rod 84, a sensing arm 85, a sensing wire 86 and the like are provided.

  As shown in FIGS. 7, 8, and 9, a sensing rod 84 is connected to the front portion of the center float 9, and the sensing arm 85 can swing up and down around the horizontal axis P <b> 7 in the left-right direction of the support member 80. It is supported. The horizontal axis P7 is located at the front and rear intermediate portion of the sensing arm 85, and the upper portion of the sensing rod 84 and the rear portion of the sensing arm 85 are connected.

  As shown in FIGS. 7, 8, and 9, the wire receiving portion 80 a is connected to the front portion of the support member 80, and the outer 86 b of the sensing wire 86 is connected to the wire receiving portion 80 a of the support member 80. A connecting member 87 is connected to the inner 86 a of the sensing wire 86, and a front pin 85 a of the sensing arm 85 is inserted into the elongated hole 87 a of the connecting member 87, so that the front of the sensing arm 85 and the inner 86 a of the sensing wire 86 are inserted. And are connected. As shown in FIG. 14, the sensing wire 86 is extended to the body K, and the inner 86 a of the sensing wire 86 is connected to the control valve 71.

  With the above structure, as shown in FIG. 14, the vertical movement of the center float 9 with respect to the seedling planting device 5 causes the sensing arm 85 to swing up and down, and the inner 86a of the sensing wire 86 is pulled and returned, The control valve 71 is operated.

  As shown in FIGS. 7, 8, and 9, when the seedling planting device 5 is raised and the center float 9 is lowered with respect to the seedling planting device 5, the sensing rod 84 is lowered, and the front portion of the sensing arm 85. The sensing arm 85 swings so as to rise.

As shown in FIGS. 7, 8, and 9, a lower limit position pin 85 b is connected laterally to the front portion of the sensing arm 85.
When the center float 9 is lowered with respect to the seedling planting device 5, the lower limit position pin 85b of the sensing arm 85 hits the lower part of the wire receiving portion 80a of the support member 80, so that the swinging of the sensing arm 85 is stopped. The descent of the center float 9 with respect to the seedling planting device 5 stops. Thereby, when the seedling planting device 5 is lifted to a position away from the surface G, the center float 9 is stopped at the lower limit position where the lower limit position pin 85b of the sensing arm 85 hits the lower portion of the wire receiving portion 80a of the support member 80. It will be in the state which does not fall any more.

  As shown in FIGS. 7 and 8, the planting depth lever 42 and the lever guide 43 are located on the rear side in the side view, and the support bracket 77, the support links 78 and 79, the support member 80, the linkage rod 82, and the sensing. The planting depth lever 42 and the lever guide 43, the support bracket 77, the support links 78 and 79, the support member 80, the linkage rod 82, the sense rod 84, and the sense arm so that the rod 84 and the sense arm 85 are located on the front side. 85 are arranged in the front-rear direction.

  As shown in FIG. 5, the sensing wire 86 and the planting depth lever 42 are arranged in the left-right direction when viewed from the front. As shown in FIGS. 7 and 8, the sensing wire 86 and the planting depth lever 42 are disposed so as to overlap and intersect with each other in a side view.

(Elevation control of seedling planting device) -1
As to the state where the seedling planting device 5 is automatically driven up and down so that the planting depth of the seedling by the planting arm 8 is maintained at the set depth, this section and the later-described (raising and lowering of the seedling planting device) Control) -2.

The state shown in FIGS. 3, 7, and 14 is a state in which the position of the horizontal axis P5 (center float 9 and side float 11) is set by the planting depth lever 42, and the control valve 71 is operated to the neutral position. The raising / lowering of the seedling planting device 5 is stopped.
The planting arm 8 is rotationally driven with a fixed trajectory with respect to the seedling planting device 5, and the planting depth of the seedling by the planting arm 8 is a set depth.
The center float 9 follows the ground surface G and is in a state where the support member 80 (horizontal axis P7) is set to the set height A1 from the surface G.

  7 and 14, when the seedling planting device 5 is lowered (when the seedling planting device 5 is close to the surface G), the support member 80 (horizontal axis P7) is also lowered from the set height A1. Therefore, the planting depth of the seedling by the planting arm 8 becomes deeper than the set depth, and the center float 9 rises with respect to the seedling planting device 5.

  As a result, as shown in FIGS. 7 and 14, the rise of the center float 9 is transmitted to the sensing wire 86 via the sensing rod 84 and the sensing arm 85, and the inner 86a of the sensing wire 86 is connected to the seedling planting device 5 side. The control valve 71 is moved to the raised position, and the seedling planting device 5 and the support member 80 (horizontal axis P7) are raised.

  As shown in FIGS. 7 and 14, as the seedling planting device 5 is raised, the center float 9 is lowered with respect to the seedling planting device 5, and the inner 86a of the sensing wire 86 is moved to the control valve 71 side. A return operation is performed. When the support member 80 (horizontal axis P7) is raised to the set height A1, the control valve 71 is operated to the neutral position, and the raising of the seedling planting device 5 is stopped. The attachment depth returns to the set depth.

  In this case, since the lowering spring (not shown) for biasing the control valve 71 from the raised position to the lowered position is provided, the center float 9 is lowered with respect to the seedling planting device 5 as described above. At this time, the inner 86a of the sensing wire 86 is pulled toward the control valve 71, and the inner 86a of the sensing wire 86 is returned to the control valve 71 without difficulty.

(Elevation control of seedling planting device) -2
7 and 14, when the seedling planting device 5 is raised (when the seedling planting device 5 is separated from the surface G), the support member 80 (horizontal axis P7) is also raised together from the set height A1. Therefore, the planting depth of the seedling by the planting arm 8 becomes shallower than the set depth, and the center float 9 is lowered with respect to the seedling planting device 5.

  As a result, as shown in FIGS. 7 and 14, the lowering of the center float 9 is transmitted to the sensing wire 86 through the sensing rod 84 and the sensing arm 85, and the inner 86a of the sensing wire 86 is returned to the control valve 71 side. Then, the control valve 71 is operated to the lowered position by the lowering biasing spring, and the seedling planting device 5 and the support member 80 (horizontal axis P7) are lowered.

  As shown in FIGS. 7 and 14, as the seedling planting device 5 is lowered, the center float 9 rises with respect to the seedling planting device 5, and the inner 86 a of the sensing wire 86 is connected to the seedling planting device 5. Pulled to the side. When the support member 80 (horizontal axis P7) is lowered to the set height A1, the control valve 71 is operated to the neutral position, and the descent of the seedling planting device 5 is stopped. The attachment depth returns to the set depth.

For example, it is assumed that the center float 9 enters the concave portion of the surface G and the center float 9 is rapidly lowered.
In this case, as shown in FIGS. 7 and 8, the front portion of the sensing arm 85 is in a state of rapidly rising, but the pin 85a of the sensing arm 85 is located upward along the elongated hole 87a of the connecting member 87. The state where the inner arm 86a of the sensing wire 86 is rapidly returned to the control valve 71 side by the sensing arm 85 does not occur simply by moving. As a result, the control valve 71 is operated to the lowered position with a slight delay by the aforementioned downward biasing spring, so that the seedling planting device 5 and the support member 80 (horizontal axis P7) are rapidly lowered. No situation arises.

  As described above, the seedling planting device 5 is automatically driven up and down as described above (Control for raising and lowering the seedling planting device) -1 and this section, and seedling planting by the planting arm 8 is performed. The depth is maintained at the set depth.

(Change of planting depth (set depth) of seedlings by planting arm)
Regarding the change of the set depth in the state where the planting depth of the seedling by the planting arm 8 is maintained at the set depth as described in the above (up and down control of the seedling planting device) -1 and 2. explain.

When the planting depth lever 42 is operated to the deep side (lower side) in the state shown in FIGS. 7 and 14, the position of the horizontal axis P5 (center float 9 and side float 11) is raised by the planting depth lever 42. And it will be in the state which approaches the seedling planting apparatus 5.
In this case, with the operation of the planting depth lever 42 to the deep side (downside), the support links 78 and 79 are operated upward by the linkage rod 82, and the support member 80 is set to the set height A1 from the field surface G. Thus, the position of the seedling planting device 5 is set on the lower side with respect to the support member 80.

  In the above state, the seedling planting device 5 is automatically set so that the support member 80 is maintained at the set height A1 as described in (Elevation control of seedling planting device) -1 and 2 described above. When driven up and down, the seedling planting device 5 is maintained at a position lower than the rice field G, and the seedling planting depth (set depth) by the planting arm 8 becomes deep.

When the planting depth lever 42 is operated to the shallow side (upper side) in the state shown in FIGS. 7 and 14, the position of the horizontal axis P5 (center float 9 and side float 11) is lowered by the planting depth lever 42. Thus, the seedling planting device 5 is separated.
In this case, with the operation of the planting depth lever 42 to the shallow side (upper side), the support links 78 and 79 are operated to the lower side by the linkage rod 82, and the support member 80 is set to the set height A1 from the surface G. Thus, the position of the seedling planting device 5 is set to the upper side with respect to the support member 80.

  In the above state, the seedling planting device 5 is automatically set so that the support member 80 is maintained at the set height A1 as described in (Elevation control of seedling planting device) -1 and 2 described above. When driven up and down, the seedling planting device 5 is maintained at a high position from the surface G, and the seedling planting depth (set depth) by the planting arm 8 is shallow.

(Rolling control of seedling planting equipment)
As shown in FIG. 5, the feed case 17 is supported so as to be able to roll around the front and rear axis P1 at the rear lower part of the link mechanism 3, and the whole seedling planting device 5 is supported so as to be able to roll around the front and rear axis P1. ing. As shown in FIG. 14, the tilt sensor 48 is attached to the feed case 17, and the tilt angle in the left-right direction of the seedling planting device 5 with respect to the horizontal plane (field surface G) is detected by the tilt sensor 48. The detection value is input to the control device 40 described later.

  As shown in FIG. 5, a rolling mechanism 46 is connected to the upper part of the rear part of the link mechanism 3. The rolling mechanism 46 includes a pair of wires 46a that are pushed and pulled in the left-right direction, a gear mechanism (not shown) that pushes and pulls the wires 46a, and an electric motor 46b.

  As shown in FIG. 5, a spring 39 is connected across the wire 46 a of the rolling mechanism 46 and the right and left portions of the horizontal frame 50. A bracket 27 a is connected to the right and left portions of the guide rail 27, and a spring 47 is connected across the arm portion 46 c fixed to the rolling mechanism 46 and the bracket 27 a of the guide rail 27.

  As shown in FIG. 5, the right or left spring 47 is extended as the seedling platform 10 is driven to reciprocate laterally, and the seedling platform 10 is laterally driven to the right (left). Then, the right (left) spring 47 is extended, and the urging force of the right (left) spring 47 suppresses the inclination of the seedling planting device 5 to the right (left).

  As shown in FIGS. 5 and 14, the inclination angle of the horizontal direction of the seedling planting device 5 with respect to the horizontal plane (field G) is detected by the inclination sensor 48, and the electric motor 46 b of the rolling mechanism 46 is operated by the control device 40. The wire 46a of the rolling mechanism 46 is pushed and pulled, and the seedling planting device 5 is kept horizontal.

  In this case, as shown in FIG. 5, when the wire 46a of the rolling mechanism 46 is pushed and pulled, the spring 39 is slightly expanded and contracted, and the rapid pushing and pulling operation of the wire 46a of the rolling mechanism 46 is performed. It is slightly relaxed and transmitted to the seedling planting device 5.

(Control system configuration of seedling planting device)
As shown in FIG. 14, a control device 40 is attached to the lower side of the driver seat 31 in the body K. A battery 124 (corresponding to a power supply unit) is mounted on the machine body K, and a harness 125 is connected between the control device 40 and the battery 124, and power is supplied to the control device 40.

  As shown in FIGS. 2 and 14, seedling sensors 75 are provided on the right and left sides of the vertical feed mechanism 25 on the seedling surface of the seedling platform 10. The seedling sensor 75 detects that the number of seedlings on the seedling surface of the seedling setting table 10 has decreased beyond a predetermined amount, and a detection signal of the seedling sensor 75 is input to the control device 40.

  As shown in FIG. 14, when the detection signal of the seedling sensor 75 is input to the control device 40, the notification device 76 (notification lamp, notification buzzer, etc.) is activated by the control device 40, so the operator stops the machine body K. Then, seedlings are replenished to the seedling setting table 10.

  As shown in FIG. 14, a lowering sensor 73 that detects that the elevating operation lever 72 is operated to the lowering position or the planting position is provided, and a detection signal of the lowering sensor 73 is input to the control device 40. .

As shown in FIG. 14, when the lifting operation lever 72 is operated to the raised position and the neutral position, the blower 14 is stopped by the control device 40, and the rolling mechanism 46 (electric motor 46 b) is stopped by the control device 40.
When the elevating operation lever 72 is operated to the lowered position and the planting position, the blower 14 is operated by the control device 40, and the rolling mechanism 46 (electric motor 46b) is operated by the control device 40.

(Overall structure of leveling device)
As shown in FIGS. 2, 3, 4, and 5, the leveling device 53 is disposed across the right and left portions of the seedling planting device 5 so that the leveling device 53 is located between the machine body K and the seedling planting device 5. It is supported by the seedling planting device 5 so as to be movable up and down.

  As shown in FIGS. 3, 4, and 5, a leveling transmission case 81 (corresponding to the lifting mechanism) is provided on the left side of the leveling device 53, and a leveling support arm 83 (corresponding to the lifting mechanism) is provided on the right side of the leveling device 53. Is provided. The rear part of the leveling transmission case 81 and the rear part of the leveling support arm 83 are supported so as to be swingable up and down around the horizontal axis P2 in the left-right direction of the seedling planting device 5, and the leveling transmission case 81 and the leveling support arm 83 are in front. It is extended to.

  As shown in FIGS. 4 and 5, a drive shaft 61 (see FIG. 12) having a square section is rotatably supported across the front portion of the leveling transmission case 81 and the front portion of the leveling support arm 83. A small and small diameter leveling body 62 integrally formed of synthetic resin and a small and large diameter leveling body 63 integrally formed of synthetic resin are provided, and the leveling bodies 62 and 63 are integrated with the drive shaft 61. It is attached to rotate. Positions of the leveling bodies 62 and 63 are determined by a boss member 57 and spacers 64, 68 and 69 attached to the drive shaft 61.

  As shown in FIGS. 3, 4, and 5, a mounting portion 81 a is provided in the upper portion of the front portion of the leveling transmission case 81, and a mounting portion 83 a is provided in the upper portion of the front portion of the leveling support arm 83. The support frame 67 is connected across the attachment portion 81 a and the attachment portion 83 a of the leveling support arm 83.

  As shown in FIGS. 4, 5, 8, and 12, metal covers 65 and 66 are connected to the support frame 67 so as to be positioned on the rear side of the leveling bodies 62 and 63. When the leveling bodies 62 and 63 are rotationally driven and the surface G is leveled, even if the leveling bodies 62 and 63 cause the mud and water on the surface G to jump back, It can be stopped.

  As shown in FIGS. 3, 4, and 5, the leveling device 53 includes a leveling transmission case 81, a leveling support arm 83, a drive shaft 61, a drive shaft 107 (see FIGS. 10 and 11), leveling bodies 62 and 63, and a cover 65. 66, a support frame 67, and the like.

  As shown in FIGS. 1-5, the leveling device 53 is arrange | positioned so that it may be located in the rear side of the rear-wheel 2 in the front side of the seedling planting apparatus 5 (center float 9 and side float 11), The device 53 is disposed between the machine body K and the seedling planting device 5, is disposed over the right part and the left part of the seedling planting device 5, and is supported by the seedling planting device 5 so as to be movable up and down. The leveling device 53 and the leveling support arm 83 swing up and down around the horizontal axis P2, so that the leveling device 53 is supported by the seedling planting device 5 so as to be movable up and down.

(Structure related to leveling transmission case)
As shown in FIGS. 4 and 10, in the planting transmission case 6 at the left end of the seedling planting device 5, a support case 91 is provided outside the portion of the planting transmission shaft 32. Intermediate cases 89 and 92 are provided between the transmission case 6 and the transmission case 6. An intermediate case 89 is connected to the outside of the planting transmission shaft 32 in the planting transmission case 6 by a bolt 90, and the support case 91 and the intermediate case 89 are connected by a bolt 93 across the intermediate case 92. ing.

  As shown in FIG. 10, flange portions 92a and 92b are connected to both ends of the intermediate case 92, and a plurality of openings for passing bolts 93 through the flange portions 92a and 92b are opened. A pipe portion 92c is connected to the opening portion. A plurality of openings for passing the bolts 93 are opened in the flange portion 91 a of the support case 91. An opening is opened in the flange portion 89a of the intermediate case 89, and a female screw is formed in the opening.

With the above structure, as shown in FIG. 10, the bolt 93 is provided with the opening portion of the flange portion 91 a of the support case 91, the opening portions of the flange portions 92 a and 92 b of the intermediate case 92 and the pipe portion 92 c, and the flange portion of the intermediate case 89. The bolt 93 is fastened to and connected to the female screw of the flange portion 89 a of the intermediate case 89.
In this case, when viewed from the axial direction of the planting transmission shaft 32, the arrangement of the bolts 90 and the arrangement of the bolts 93 are set to be different.

  As shown in FIG. 10, a large-diameter receiving portion 91 b is formed on the left portion of the support case 91, and a lateral support portion 81 b is formed on the rear portion of the leveling transmission case 81, and the receiving portion 91 b of the support case 91 is formed on the receiving portion 91 b. The support portion 81b of the leveling transmission case 81 is rotatably inserted and attached. Thereby, the rear part of the leveling transmission case 81 is supported so as to be swingable up and down around the horizontal axis P2 of the planting transmission case 6 at the left end, and the leveling transmission case 81 is extended to the front side.

(Structure related to leveling support arm)
As shown in FIGS. 4 and 5, a bracket 94 is connected to the right end portion and the left end portion of the support frame 18 by welding. As shown in FIGS. 4 and 11, a support member 95, which is a channel-shaped member whose open portion faces downward, is disposed in the front-rear direction, and the support shaft 97 is connected to the rear portion of the support member 95 by welding. ing.

  As shown in FIG. 11, the connecting member 96 is connected to the front portion of the support member 95 by welding. The connecting member 96 has an angle shape in plan view, and includes a first portion 96a in the left-right direction and a second portion 96b in the front-rear direction, and a nut 96c is connected to the first portion 96a by welding.

  As shown in FIG. 11, the first portion 96 a of the connecting member 96 is applied to the rear portion of the bracket 94, and the bolt 98 is inserted into the opening of the bracket 94 and the nut 96 c of the connecting member 96 and tightened. The second part 96 b of the connecting member 96 is applied to the right part of the bracket 94, and the bolt 100 is inserted into the opening of the bracket 94 and the second part 96 b of the connecting member 96 and tightened.

  As shown in FIG. 11, the support member 95 is connected to the bracket 94 by the bolt 98 in the front-rear direction and the bolt 100 in the left-right direction, and the support shaft 97 is positioned at the position of the horizontal axis P2 shown in FIGS. Be placed.

  As shown in FIG. 11, the rear portion of the leveling support arm 83 is supported on a support shaft 97 (around the horizontal axis P2) so as to be swingable up and down, and the leveling support arm 83 extends to the front side. In order to avoid interference between the leveling support arm 83 and the bolt 100, an intermediate portion 83b of the leveling support arm 83 projects outward.

(Transmission structure to leveling device)
As shown in FIGS. 4 and 10, the power transmitted to the seedling planting device 5 is transmitted from the planting transmission shaft 32 of the planting transmission case 6 at the left end to the intermediate cases 89 and 92, the support case 91 and the leveling transmission case. 81 is transmitted to the drive shafts 61 and 107 of the leveling device 53 by a transmission system provided over the interior of 81.

  As shown in FIG. 10, the relay transmission shaft 101 is rotatably supported across the ground leveling transmission case 81 and the support case 91. The planting transmission shaft 32 passes from the planting transmission case 6 through the inside of the intermediate case 89, and the end 32 a of the planting transmission shaft 32 is slightly inside the intermediate case 92.

  As shown in FIG. 10, a cylindrical joint member 102 is disposed inside the intermediate cases 89 and 92, and the planting transmission shaft 32 and the joint member 102 are connected by a key 103. The joint member 102 is slightly inside the support case 91, and the relay transmission shaft 101 and the joint member 102 are connected by a key 103.

  As shown in FIG. 10, the pin-shaped positioning member 104 that determines the position of the joint member 102 in the axial direction is the vicinity of the end portion 32 a of the planting transmission shaft 32 in the joint member 102, and the relay transmission in the joint member 102. In the vicinity of the end portion 101a of the shaft 101, the joint member 102 is attached so as to penetrate in the radial direction.

  As shown in FIG. 10, a sprocket 105 is externally fitted to the end of the relay transmission shaft 101 inside the rear portion of the leveling transmission case 81, and the relay transmission shaft 101 and the sprocket 105 are connected via a torque limiter 106. ing.

  As shown in FIGS. 10 and 11, a drive shaft 107 is rotatable around a horizontal axis P8 (see FIGS. 3 and 4) in the left-right direction at the front part of the leveling transmission case 81 and the front part of the leveling support arm 83. The drive shaft 61 is coupled to the drive shaft 107. As shown in FIG. 10, a sprocket 107 a is connected to the drive shaft 107 inside the leveling transmission case 81, and a transmission chain 108 is attached across the sprocket 105 and the sprocket 107 a of the drive shaft 107.

4 and 10, the power of the planting transmission shaft 32 causes the coupling member 102, the relay transmission shaft 101, the torque limiter 106, the sprocket 105, the transmission chain 108, and the sprocket 107 a of the drive shaft 107. The drive shafts 61 and 107 and the leveling bodies 62 and 63 are rotationally driven around the horizontal axis P8 in FIG. 3 in the counterclockwise direction.
When the leveling device 53 pinches foreign matter such as stones and a large load is generated on the drive shafts 61 and 107 and the leveling bodies 62 and 63, the torque limiter 106 is cut off, and the leveling device 53 is prevented from being damaged.

(Structure of front part of leveling transmission case and front part of leveling support arm)
As shown in FIG. 10, an opening for supporting the drive shaft 107 in the outer portion on the opposite side of the leveling bodies 62 and 63 in the front portion of the leveling transmission case 81 where the drive shafts 61 and 107 are supported. 81 c is formed, and the drive shaft 107 slightly protrudes outward from the opening 81 c of the leveling transmission case 81.

  As shown in FIG. 10, a seal member 110 is attached to a portion of the opening 81 c of the leveling transmission case 81 in the drive shaft 107, and a disk that protects the seal member 110 from the outside at the end of the drive shaft 107. The protective member 111 is connected by a bolt 112.

  As shown in FIG. 10, a spacer 68 that secures a space between the leveling transmission case 81 and the leveling body 63 is attached to the front side of the leveling transmission case 81 on the leveling transmission case 81 side of the drive shafts 61 and 107. ing.

  As shown in FIG. 11, in the front part of the leveling support arm 83 on which the drive shafts 61 and 107 are supported, an opening for supporting the drive shaft 107 on the outer side opposite to the leveling bodies 62 and 63. 83c is formed, and the drive shaft 107 slightly protrudes outward from the opening 83c of the leveling support arm 83.

  As shown in FIG. 11, a seal member 110 is attached to a portion of the opening 83 c of the leveling support arm 83 in the drive shaft 107, and a disk that protects the seal member 110 from the outside at the end of the drive shaft 107. The protective member 111 is connected by a bolt 112.

  As shown in FIG. 11, a spacer 69 that secures a space between the leveling support arm 83 and the leveling body 63 is attached to a portion of the drive shafts 61, 107 on the leveling support arm 83 side at the front portion of the leveling support arm 83. ing.

(Elevating structure of leveling device)
As shown in FIGS. 3, 5, and 12, the support frame 52 is connected to the support frame 18 so as to be located on the left side of the link mechanism 3, and the fan is formed around the horizontal axis P <b> 3 in the left-right direction of the support frame 52. A lifting gear 54 of the mold is supported so as to be swingable up and down. A gear mechanism 55 having a pinion gear 55 a and an electric motor 56 (corresponding to an electric actuator) that drives the gear mechanism 55 are connected to the support frame 52, and the pinion gear 55 a of the gear mechanism 55 is engaged with the elevating gear 54.

  As shown in FIGS. 4, 5, and 12, on the left side of the central portion of the drive shaft 61, a boss member 57 is externally fitted to the drive shaft 61 so as to be relatively rotatable by a bearing (not shown). An arm portion 57 a extending upward is connected to the elevating gear 54.

  As shown in FIGS. 3, 5, and 6, the attachment member 109 is connected to the upper portions of the right and left vertical frames 26 by welding, and the attachment member 58 is connected to the attachment member 109 by bolts. A spring 59 is connected across the right end of the support frame 67 (mounting portion 83a of the leveling support arm 83) and the right mounting member 58, and the left end of the support frame 67 (mounting portion 81a of the leveling transmission case 81) and the left A spring 59 is connected across the mounting member 58, and the leveling device 53 is biased upward by the biasing force of the spring 59.

As shown in FIG. 12, the ground leveling device 53 is driven by rotating the pinion gear 55a of the gear mechanism 55 forward and backward by the electric motor 56 and swinging the lifting gear 54 up and down around the horizontal axis P3. The planting device 5 is driven up and down.
As shown in FIG. 8 and FIG. 15, the leveling device 53 is driven by the electric motor 56 in the range of the work position A3 where the field G is grounded by grounding the field G and the non-work position A4 which is separated from the field G upward. It can be driven up and down.

(Positional relationship between sensing mechanism and leveling device) -1
As shown in FIGS. 2 and 8, the center float 9 is disposed on the rear side of the leveling device 53. As shown in FIGS. 7 and 8, in the sensing mechanism 88, the sensing rod 84 is arranged on the rear side of the leveling device 53 in the vertical direction.

  As shown in FIGS. 7 and 8, in the sensing mechanism 88, the support bracket 77, the support links 78 and 79, the support member 80, and the linkage rod 82 are arranged on the upper side of the leveling device 53. A sensing arm 85 extends from the upper part of the sensing rod 84 to the front side of the leveling device 53. A sensing wire 86 extends upward from the front of the sensing arm 85.

  As shown in FIGS. 7 and 8, in the sensing mechanism 88, the support bracket 77, the support links 78 and 79, the support member 80, the linkage rod 82, the sense rod 84, and the sense arm 85 are connected from the center float 9 to the leveling device 53. The leveling device 53 is arranged so as to bypass the upper side, and enters the front side of the sensing rod 84 and the lower side of the sensing arm 85 and the like.

(Positional relationship between sensing mechanism and leveling device) -2
As shown in FIGS. 4 and 5, in the leveling device 53, non-existing regions 114, 115, and 116 where the leveling bodies 62 and 63 are not provided are set by the spacer 64 and the boss member 57.

  As shown in FIGS. 4 and 5, the non-existing region 117 where the covers 65 and 66 are not provided is set by opening the covers 65 and 66. The non-existing region 117 is located on the rear side (upper side) of the non-existing region 114 and is the same region as the non-existing region 114 where the leveling bodies 62 and 63 are not provided.

  As shown in FIGS. 4 and 5, in the cover 65, notches 65 a and 65 b opened to the upper side are formed in portions located on the upper side (rear side) of the non-existing regions 114 and 115. Two openings 65c along the vertical direction are opened in a portion adjacent to 117. In this case, the notches 65a and 65b of the cover 65 are the same areas as the non-existing areas 115 and 116 where the leveling bodies 62 and 63 are not provided.

  As shown in FIGS. 4 and 5, in the support frame 67, a portion located above the non-existing region 114 is greatly bent forward in plan view to form a bent portion 67a, as shown in FIG. In addition, the bent portion 67a is bent in a mountain shape so as to follow the outer peripheral portions of the leveling bodies 62 and 63 in a side view. In this case, the bent portion 67a of the support frame 67 is the same region as the non-existing region 114 where the leveling bodies 62 and 63 are not provided.

  As shown in FIGS. 4 and 5, an oblique portion 67 b extending obliquely rearward from the left portion of the bent portion 67 a of the support frame 67 is formed, and the oblique portion 67 b is located in the vicinity of the opening 65 c of the cover 65. ing.

  As shown in FIGS. 4, 5, and 8, the sensing mechanism 88 faces the non-existing regions 114 and 117 and the bent portion 67 a of the support frame 67. The PTO shaft 22 faces the non-existing region 115 and the notch 65 a of the cover 65. The boss member 57 (arm portion 57 a) faces the non-existing region 116 and the notch portion 65 b of the cover 65.

  As a result, as shown in FIGS. 4, 5, and 8, when the leveling device 53 is driven up and down across the work position A <b> 3 and the non-work position A <b> 4, the sensing mechanism 88 is moved to the non-existing areas 114 and 117 and the support frame 67. As a result, the ground leveling device 53 and the sensing mechanism 88 do not interfere with each other.

  As shown in FIG. 8, the sensing mechanism 88 enters the non-existing regions 114 and 117 and the bent portion 67a of the support frame 67 in a state where the leveling device 53 is located at the non-working position A4. 88 (support bracket 77, support link 78, support member 80, sensing arm 85) overlaps with leveling device 53 (support frame 67). In a side view, the sensing mechanism 88 (support link 78) and the leveling device 53 (leveling body 63, covers 65, 66) are overlapped.

  As shown in FIGS. 4, 5, and 8, when the leveling device 53 is driven up and down across the work position A <b> 3 and the non-work position A <b> 4, the PTO shaft 22 enters the non-existing region 115 and the notch 65 a of the cover 65. In this state, there is no interference between the leveling device 53 and the PTO shaft 22.

  As shown in FIGS. 4, 5, and 8, when the leveling device 53 is driven up and down across the work position A <b> 3 and the non-work position A <b> 4, the boss member 57 (arm portion 57 a) cuts the non-existing area 116 and the cover 65. As a result, the ground leveling device 53 and the boss member 57 (arm portion 57a) do not interfere with each other.

(Arrangement of control system of leveling device)
As shown in FIGS. 5 and 6, in the seedling planting device 5, a control device 118 (corresponding to a control unit) and an operation box 119 are attached to the right portion of the link mechanism 3 in the horizontal frame 50 in a front view. Yes.

  As shown in FIGS. 6 and 15, an operation switch 120 (corresponding to the operation operation unit) and a leveling depth dial 121 (corresponding to the leveling depth operation unit) are provided on the upper surface of the operation box 119. The operation switch 120 is a push button type that is artificially pushed, and the leveling depth dial 121 is a dial switch type that is artificially rotated.

  As shown in FIGS. 5 and 6, in the seedling planting device 5, a mudguard cover 123 is disposed on the front side of the vertical feed mechanism 25, and the mudguard cover 123 is attached to the support frame 18 and the vertical frame 26. The upper end 123 a of the mudguard cover 123 is positioned above the upper end 25 a of the vertical feed mechanism 25, and the horizontal frame 50 is positioned above the upper end 123 a of the mudguard cover 123.

  As a result, as shown in FIGS. 5 and 6, the control device 118 and the operation box 119 (the operation switch 120 and the leveling depth dial 121) are attached to the seedling planting device 5, and the seedling planting device 5. Is attached to a portion above the upper end portion 25a of the vertical feed mechanism 25, and is attached to a portion above the upper end portion 123a of the mudguard cover 123 in the seedling planting device 5, so that the mudguard cover 123 It is in the state attached to the horizontal frame 50 above the upper end part 123a.

(Configuration of leveling device control system)
As shown in FIG. 15, the harness 122 is connected across the control device 118, the operation switch 120, and the leveling depth dial 121, and operation signals of the operation switch 120 and the leveling depth dial 121 are input to the control device 118. The

  As shown in FIG. 13, a bracket 126 is bolted to the support frame 18, and a potentiometer type set depth sensor 127 is attached to the bracket 126. An arm 41 b connected to the support shaft 41 extends upward and is connected to a detection arm 127 a of the set depth sensor 127.

  As shown in FIG. 15, a harness 128 is connected across the control device 118 and the set depth sensor 127. When the set depth is set and changed by the planting depth lever 42 as described above (changing the planting depth (set depth) of the seedling by the planting arm), the set depth is set. It is detected by the depth sensor 127 and input to the control device 118.

  As shown in FIGS. 12 and 15, in the leveling device 53, a potentiometer type height sensor 74 is fixed to the support frame 52 so as to be positioned on the horizontal axis P3, and the height sensor 74, the lifting gear 54, Is connected. The height of the leveling device 53 relative to the seedling planting device 5 is detected by detecting the angle of the elevating gear 54 with respect to the support frame 52 by the height sensor 74.

  As shown in FIG. 15, the harness 129 is connected across the control device 118 and the height sensor 74, and the height of the leveling device 53 relative to the seedling planting device 5 is input to the control device 118. The harness 130 is connected across the control device 118 and the electric motor 56, and the electric motor 56 is operated by the control device 118.

  As shown in FIGS. 1 and 14, the harness 131 is extended from the battery 124 installed in the airframe and reaches the rear end portion of the link mechanism 3 along the upper part of the link mechanism 3. A coupler 132 is connected to the leading end.

  As shown in FIG. 14, a planting sensor 133 that detects that the elevating operation lever 72 is operated to the planting position is provided. A harness 134 extends from the planting sensor 133, and the harness 134 reaches the rear end of the link mechanism 3 along the upper part of the link mechanism 3 and is connected to the coupler 132.

  As shown in FIGS. 6, 14, and 15, a coupler 135 is provided at the lower portion of the control device 118, and a harness 136 is connected across the couplers 132 and 135, and the power of the battery 124 and the detection of the planting sensor 133 are detected. A signal is supplied to and input to the controller 118.

(Elevation control of leveling device)
Based on the above description (configuration of control system of the leveling device), the control device 118 operates the electric motor 56 to drive the leveling device 53 up and down. The control of the leveling device 53 by the control device 118 will be described below. Explained.

  As shown in FIG. 15, the leveling device 53 at the non-work position A4 can be lowered to the work position A3 by pushing the operation switch 120, and the work position A3 is pushed by pushing the operation switch 120. The leveling device 53 can be raised to the non-working position A4.

  In this case, the leveling device 53 can be moved up and down by pushing the operation switch 120 as described above in a state where the lifting operation lever 72 is operated to the planting position by detection of the planting sensor 133.

That is, as shown in FIGS. 14 and 15, when the leveling device 53 is in the non-working position A4 and the lifting operation lever 72 is not operated to the planting position, the operation switch 120 is pushed. Even so, the leveling device 53 remains in the non-work position A4 without being lowered to the work position A3.
When the leveling device 53 is located at the work position A3 and the lifting operation lever 72 is operated from the planting position to another position, the leveling device 53 is not in operation even if the operation switch 120 is not pressed. The position automatically rises to position A4.

  As shown in FIG. 15, in the state where the leveling device 53 is located at the work position A3, the leveling bodies 62 and 63 slightly enter the surface G and rotate to level the field G. In this case, the leveling depth A2 can be adjusted to the shallow side and the deep side by operating the leveling depth dial 121 at the leveling depth A2 where the leveling bodies 62 and 63 enter the field G.

  Operate the planting depth lever 42 to set the planting depth (set depth) of the seedling as described above (Change of planting depth (set depth) of the seedling by the planting arm). If it changes, since the height from the surface G to the seedling planting apparatus 5 will change, the height from the surface G to the horizontal axis P2 will also change accordingly, and the leveling depth A2 will change.

  As shown in FIG. 15, the set depth is detected by the set depth sensor 127 and input to the control device 118. Thereby, when the set depth is changed to the shallow side (when the position of the horizontal axis P2 is changed to the upper side), the leveling device 53 is automatically set by the amount that the set depth is changed to the shallow side. The leveling depth A2 is maintained at the value set by the leveling depth dial 121.

  As shown in FIG. 15, when the set depth is changed to the deep side (when the position of the horizontal axis P <b> 2 is changed to the lower side), the leveling device is changed by the amount that the set depth is changed to the deep side. 53 is automatically raised, and the leveling depth A2 is maintained at the value set by the leveling depth dial 121.

(Specifications for riding rice transplanters without leveling equipment)
1 to 15 show a riding type rice transplanter equipped with a leveling device 53.
On the other hand, in the riding type rice transplanter not equipped with the leveling device 53, the machine body K, the seedling planting device 5 and the like are used as they are, and changes as shown in the following (1) to (6) are performed. The parts other than the changes shown in (1) to (6) are the same as the riding type rice transplanter equipped with the leveling device 53.

(1) Since the leveling device 53 is not equipped, the leveling transmission case 81, the leveling support arm 83, the intermediate cases 89 and 92, the relay transmission shaft 101, the joint member 102, the key 103, and the bolt 93 shown in FIGS. The positioning member 104, the support member 95 shown in FIGS. 4, 5 and 11, the connecting member 96, the support shaft 97, the bolts 98 and 100, the mounting member 58 and the spring 59 shown in FIGS.

(2) The planting transmission shaft 32 is exposed from the planting transmission case 6 at the left end shown in FIG. 10 because the intermediate cases 89 and 92 are not equipped as described in the preceding item (1).
In this case, a cover member (not shown) provided with a bearing and a seal member is connected to a portion of the planting transmission shaft 32 in the planting transmission case 6 at the left end by a bolt 90 on the outside, and the planting transmission shaft 32 A cap (not shown) is attached to the end.

(3) The support frame 52, the elevating gear 54, the gear mechanism 55, the electric motor 56, the height sensor 74, the boss member 57, the bracket 126 shown in FIG. 13, and the set depth sensor 127 shown in FIGS. .

(4) The control device 118, the operation box 119 (the operation switch 120 and the leveling depth dial 121), and the harnesses 122, 128, 129, 130, and 136 shown in FIGS. In this case, a lid (not shown) is attached to the coupler 132 to protect the terminal of the coupler 132 and the like.

(5) The sensing mechanism 88 shown in FIGS. In this case, instead of the sensing mechanism 88, another sensing mechanism (not shown) is connected across the center float 9 and the control valve 71.

  A bracket (not shown) that supports the other sensing mechanism is connected to the support frame 18 and the like, and the bracket remains in the riding type rice transplanter equipped with the leveling device 53. Thereby, in the riding type rice transplanter equipped with the leveling device 53, as shown in FIG. 4, the interference between the cover 65 and the support frame 67 and the bracket described above causes the opening 65c of the cover 65 and the oblique portion of the support frame 67. It is avoided by 67b.

(6) The guard member 113 shown in FIGS. In this case, instead of the guard member 113, a guard member (not shown) whose posture can be freely changed to a protective posture and a support posture is attached to the right and left brackets 94 of the support frame 18.

  The protective posture described above is a posture that protects the right end portion (left end portion) of the guide rail 38 by being positioned in the vicinity of the outer side of the right end portion (left end portion) of the guide rail 38 in the same manner as the guard member 113. The support posture is a posture that extends downward from the support frame 18 and touches the ground to function as a stand that supports the seedling planting device 5 on the ground.

(Another embodiment of the invention)
In the seedling planting device 5, the control device 118 and the operation box 119 (the operation switch 120 and the leveling depth dial 121) may be attached to the left portion of the link mechanism 3 in the horizontal frame 50 in front view.

  In the seedling planting device 5, the control device 118 and the operation box 119 (the operation switch 120 and the leveling depth dial 121) may be attached to a portion of the seedling planting device 5 such as the vertical frame 26 instead of the horizontal frame 50. .

  In the seedling planting device 5, the control device 118 is attached to one part on the right side and the left side of the link mechanism 3 in front view, and the operation box 119 (actuation on the other part on the right side and left side of the link mechanism 3 in front view A switch 120 and a leveling depth dial 121) may be attached.

  In the control device 118, the harness 136 shown in FIG. 15 is extended from the control device 118 so that the coupler 135 is connected to the extended end of the harness 136, and the coupler 135 is connected to the coupler 132. Also good.

  With regard to (4) of the above-mentioned (specification of a riding type rice transplanter not equipped with a leveling device), in addition to the change described in (4), the planting sensor 133, harnesses 131 and 134 and coupler shown in FIGS. 14 and 15 You may comprise so that 132 may not be equipped.

  The leveling depth dial 121 may not be provided. According to this configuration, the leveling depth A2 shown in FIG. 15 cannot be adjusted, and the leveling depth A2 is maintained at a constant value. The bracket 126, the set depth sensor 127, and the support shown in FIGS. The arm 41b of the shaft 41 and the harness 128 are not necessary.

  The bracket 126, the set depth sensor 127, the harness 128, and the arm 41b of the support shaft 41 may not be provided. According to this configuration, when the planting depth (set depth) of the seedling is changed to the shallow side by the planting depth lever 42, the leveling depth A2 is also changed to the shallow side accordingly. When the seedling planting depth (set depth) is changed to the deep side by the depth lever 42, the leveling depth A2 is also changed to the deep side accordingly.

  Instead of the leveling transmission case 81 and the leveling support arm 83, the leveling device 53 may be supported by the seedling planting device 5 so as to be movable up and down by an elevating mechanism (not shown) provided with a parallel link or the like. In this case, the power is not transmitted from the seedling planting device 5 to the leveling device 53 but is transmitted to the leveling device 53 via a transmission shaft (not shown) extended from the machine body K. May be.

  Regarding (6) of the above (specification of the riding type rice transplanter not equipped with the leveling device), the guard member 113 shown in FIGS. 3, 4 and 5 may be used in the riding type rice transplanter not equipped with the leveling device 53. .

  The present invention can be applied not only to a riding type rice transplanter but also to a riding type direct seeder provided with a seeding device (not shown) for supplying seeds to the rice field G as a working device at the rear part of the machine body K.

DESCRIPTION OF SYMBOLS 3 Link mechanism 5 Working apparatus, seedling planting apparatus 8 Planting arm 10 Seedling stand 25 Vertical feed mechanism 25a Upper end part of vertical feed mechanism 50 Horizontal frame 53 Leveling device 56 Electric actuator 61,107 Drive shaft 62,53 Leveling body 81 , 83 Elevating mechanism 118 Control unit 120 Actuation operation unit 121 Leveling depth operation unit 123 Mudguard cover 123a Upper end of mudguard cover 124 Power supply unit 135 Coupler A2 Leveling depth A3 Work position A4 Non-working position G Tab surface K Machine body

Claims (7)

The work device is supported by a link mechanism connected to the rear part of the machine body so as to be swingable up and down.
A leveling device having a drive shaft that is supported and rotated in the left-right direction, and a leveling body that is attached to the drive shaft and rotates integrally with the drive shaft;
The leveling device is supported by the work device via an elevating mechanism so as to be movable up and down so as to be positioned between the machine body and the work device,
An electric actuator that drives the leveling device to move up and down is provided, and the electric actuator drives the leveling device to move up and down to a working position where the leveling device is grounded and leveled the surface, and to a non-working position away from the surface. Is free
Planting work in which an operation operation unit for operating the electric actuator is attached to the work device so that the leveling device is moved up and down to the work position and the non-work position by being manually operated. Machine.   A leveling depth operation unit that operates the electric actuator so as to change the leveling depth of the leveling device at the work position to a deep side and a shallow side by being artificially operated is provided in the work device. The planting work machine according to claim 1, which is attached. The working device includes a seedling platform on which seedlings are placed and driven laterally in a lateral direction, a vertical feeding mechanism that is provided on the seedling platform and feeds the seedlings on the seedling platform, and the seedlings. It is a seedling planting device having a planting arm that takes out seedlings from the bottom of the platform and plantes them on the rice field,
The planting work implement according to claim 2, wherein the operation operation section and the leveling depth operation section are attached to an upper portion of the vertical feed mechanism in the work device. A mudguard cover is provided on the front side of the vertical feed mechanism,
The upper end of the mudguard cover is located above the upper end of the vertical feed mechanism,
The planting work machine according to claim 3, wherein the operation operation unit and the leveling depth operation unit are attached to a portion above the upper end portion of the mudguard cover in the work device. A horizontal frame that supports the upper part of the seedling platform is provided along the left-right direction above the upper end of the mudguard cover,
The planting work machine according to claim 4, wherein the operation operation unit and the leveling depth operation unit are attached to the horizontal frame. A control unit for operating the electric actuator based on operation signals of the operation operation unit and the leveling depth operation unit;
The said operation operation part, the said leveling depth operation part, and the said control part are any one of the Claims 2-5 attached to the part of the same side of the right side or the left side of the said link mechanism in the said working device. The planting work machine according to one item.   The planting work machine according to claim 6, wherein the control unit includes a coupler for connecting to a power supply unit provided in the machine body.

Images