JP5714810B2 - Ride type paddy field work machine - Google Patents

Description

  The present invention includes a paddy field work device connected to a lowering work position and a lift non-working position at the rear part of the self-propelled vehicle so as to be able to be lifted and lowered, and the paddy field work device is lifted and lowered so as to maintain a set height from the surface. The present invention relates to a riding paddy field work machine that is provided with a lift control means and is provided with a grounding sensor float that detects a height from a paddy surface to the paddy field work device.

  Conventionally, there has been a transplanter as a riding paddy field working machine described in Patent Document 1, for example. In the transplanter described in Patent Document 1, a leveling rotor is provided behind the rear wheel of the traveling machine body over substantially the entire width of the planting work device. The leveling rotor is pivotally supported by the fulcrum shaft so as to be rotatable.

JP 2007-2222087 A

If there is roughness due to wheel marks or poor scratching in the passing path of the self-propelled vehicle, if seedling planting work or seeding work is performed on the same rice field, work defects such as disordered posture of planted seedlings will occur in seedling planting work. In the sowing operation, operation defects such as abnormal dispersion of seeds are likely to occur. When the above-described conventional technique is applied so that the field leveling is performed by the leveling rotor which can be driven to rotate, a problem may occur in the lifting control of the paddy field work device by the lifting control means.
In other words, when the conventional technique is applied, the leveling rotor that can be driven to rotate is positioned over the entire width of the paddy field work device, and the ground sensor float slides through the place where the leveling by the leveling of the leveling rotor is performed. On the surface where the leveling has been done by leveling, softening due to leveling has occurred, and the grounding sensor float has been detected to be abnormal due to an abnormal subsidence operation and the paddy field work equipment has been The situation that appropriate ground height control was executed was easy to occur.

  An object of the present invention is to perform leveling with a leveling rotor that can be driven by rotation, but it is easy to avoid the occurrence of improper ground level control of a paddy field work device, and the lifting operation of the leveling rotor can be simplified in structure. The object is to provide a riding paddy field machine that can be used.

The first aspect of the invention includes a paddy field work device that is connected to a descending work position and a lift non-work position at the rear part of the self-propelled vehicle so as to be able to be lifted and lowered. In the riding paddy field work machine provided with a lifting control means to operate, and provided with a grounding sensor float for detecting the height from the paddy field work device to the paddy field work device,
Provided are left and right leveling rotors that can be driven to rotate around a lateral axis of the vehicle body at the rear of the self-propelling vehicle and on the left side of the grounding sensor float and on the right side of the grounding sensor float. ,
Without providing a transmission means connected across the left leveling rotor and the right leveling rotor, a left transmission means for transmitting power to the left leveling rotor is provided, and a right side for transmitting power to the right leveling rotor is provided. Provide transmission means,
The left and right transmission means comprise a transmission case that is connected to a vehicle body lateral drive shaft located in the paddy field working device and the leveling rotor and that can swing up and down around the drive shaft,
A plurality of left support means for supporting the left leveling rotor so as to be movable up and down with respect to the frame of the paddy field work apparatus are arranged side by side in a direction along the vehicle body lateral axis of the left leveling rotor,
A plurality of right support means for supporting the right-hand leveling rotor so as to be movable up and down with respect to the frame of the paddy field work device are arranged side by side in a direction along the vehicle body lateral axis of the right-hand leveling rotor,
Providing interlocking means for interlocking the left support means and the right support means so that the left leveling rotor and the right leveling rotor are moved up and down in conjunction with each other;
A drive mechanism is provided for operating the left or right leveling rotor on the ascending side and descending side.

  According to the configuration of the first aspect of the present invention, the ground leveling rotor is distributed to the left side and the right side of the location where the ground sensor float slides, and the ground level sensor float is located where the ground level sensor float slides. And the left and right leveling rotors can be separately driven by the left and right transmission means to drive the left and right leveling rotors. On the left and right sides of the place where the ground sensor float slides while avoiding inappropriate operation caused by the soft paddy surface on the ground sensor float, such as when sliding on a leveled surface by the leveling rotor Then, the work can be performed at the place where the leveling by the leveling of the leveling rotor has been performed.

  If the rotation support shafts of the left and right leveling rotors are constituted by one drive rotation rotatable rotation shaft, and power is transmitted to the left and right leveling rotors by one rotation support shaft, the left and right leveling rotors The rotor is connected by a transmission means so as to be movable up and down integrally. In this case, a means for avoiding interference between the transmission means and the ground sensor float is required, and the structure of the transmission means and the rotation support shaft becomes complicated. On the other hand, according to the configuration of the first aspect of the present invention, power is separately transmitted to the left and right leveling rotors by the left and right transmission means, so the left and right leveling rotors are integrated by the left and right transmission means. It is not connected freely up and down. However, according to the configuration of the first invention, if the left or right leveling rotor is lifted or lowered by the drive mechanism, the left support means or the right support means generated by this operation is operated by the interlocking means by the right support means or the left support means. The right support means or the left support means can be actuated to eliminate the need to prevent interference between the left and right transmission means and the ground sensor float, and the left and right transmission means can be obtained with a simple structure. However, the left leveling rotor and the right leveling rotor can be lifted and lowered together by the drive mechanism that lifts the right or left leveling rotor.

Therefore, it is possible to perform work at a place where the leveling by the leveling of the left and right leveling rotors has been leveled, and to perform a good finish work that is unlikely to cause disordered posture of seedlings or abnormal dispersion of seeds. Although it is possible, it is possible to perform accurate lifting control that prevents the lifting control based on the inappropriate operation caused by the soft field surface of the ground sensor float, and also from this surface, it is possible to perform a good finishing operation. Further, the left and right leveling rotors can be moved up and down by the drive mechanism, such as the left and right leveling rotors linked to the setting of the working depth of the paddy field work device, and the left and right transmission means By eliminating the need for means for avoiding interference with the ground sensor float and providing a drive mechanism for raising and lowering the left or right leveling rotor, the structure can be simplified and obtained at low cost.
According to the configuration of the first invention, power can be transmitted to the leveling rotor only by connecting the transmission case across the leveling rotor and the drive shaft.
It is possible to stably support the leveling rotor with multiple support mechanisms so that the leveling rotor does not tilt due to the leveling reaction force while the load of the leveling rotor generated by the leveling reaction force is difficult to be applied to the transmission case. it can.
Therefore, it is possible to drive the ground leveling rotor simply by providing a transmission case connected across the leveling rotor and the drive shaft, but the load on the leveling rotor applied to the transmission case is suppressed and deformation or breakage of the transmission case occurs. Can be difficult.

In the second aspect of the invention, the left support means and the right support means are connected across the leveling rotor and the frame of the paddy field work device, and are arranged behind the rear wheel of the self-propelled vehicle.
Provided on the outer peripheral side of the left leveling rotor is a recessed portion into which a support member for supporting the left leveling rotor of the left support means enters,
A recessed portion into which a support member for supporting the right leveling rotor of the right support means enters is provided on the outer peripheral side of the right leveling rotor.

  Since the support member for supporting the leveling rotor of the left support means and the right support means is inserted into the recessed portion of the leveling rotor, the support member can be prevented from projecting to the outer peripheral side of the leveling rotor below the leveling rotor. It is possible to avoid the passage of the support member from being generated on the field where the leveling is performed.

  According to the second aspect of the invention, since the left support means and the right support means are arranged behind the rear wheel, even when a rim of the rear wheel enters the surface and a groove-shaped passage mark is generated, the passage mark The recessed part of the leveling rotor moves, and the inner wall surface of the recessed part of the leveling rotor presses against the rising mud that has been generated on both sides of the rim passing trace, and the rising mud is backfilled into the rim passing trace. You can

  Accordingly, it is possible not only to avoid the roughening of the surface by the support members of the left support means and the right support means, but also to effectively refill the passage marks of the rim by effectively using the recessed portion of the leveling rotor as the backfilling means. The finish can be obtained.

  In the third aspect of the invention, the drive mechanism is disposed on the vehicle body rear side with respect to the rear wheel of the self-propelled vehicle at an arrangement height lower than the upper end of the rear wheel.

  According to the structure of this 3rd invention, a drive mechanism can be compactly installed in the site | part which opposed the rear wheel by the side view of the paddy field working apparatus.

  Therefore, while the left and right leveling rotors can be adjusted up and down by the drive mechanism, a compact state can be obtained from the installation surface of the drive mechanism.

  In the fourth aspect of the invention, the drive mechanism is disposed on the rear side of the vehicle body from the front ends of the left leveling rotor and the right leveling rotor.

  According to the configuration of the fourth aspect of the present invention, even when the drive mechanism is installed behind the rear wheel, the drive mechanism does not hinder the leveling rotor and the rear wheel from approaching, and the leveling rotor approaches the rear wheel as much as possible. Thus, the paddy field work device can be connected to the self-propelled vehicle.

  Therefore, while the left and right leveling rotors can be adjusted up and down by the drive mechanism, the paddy field work device can be connected as close as possible to the self-propelled vehicle to shorten the total length of the riding paddy field work machine as much as possible.

The fifth invention, the pre-Symbol left support means and the right supporting unit, the paddy working device frame vertically swingably supported swing links, the support member for rotatably supporting said ground leveling rotor, wherein A link mechanism having a swingable intermediate link that connects the swing link and the support member is provided.

According to the configuration of the fifth aspect of the present invention, even if it is not possible to employ a support arm that swings freely around the drive shaft from the frame as the left support means and the right support means, Due to the movement and the connection of the swing link and the support member by the intermediate link, the link mechanism can be moved up and down while swinging up and down around the drive shaft, and the leveling rotor can be moved up and down.

Therefore, it is possible to left side and right side of the leveling rotor such elevating adjusted by linking the setting of the working depth of paddy working device, to perform the lift adjustment of the leveling rotor.

The sixth invention provides a left rotor cover that covers the rear of the left leveling rotor, and a right rotor cover that covers the rear of the right leveling rotor,
The left rotor cover is connected over the plurality of left support means, and the right rotor cover is connected over the plurality of right support means.

According to the configuration of the sixth aspect of the present invention , even if mud is splashed up by the leveling rotor, the mud can be received by the rotor cover so that it is difficult to attach to a device part such as a frame of the paddy field work device.

  In the left support means and the right support means, a plurality of support means are reinforced and connected by a rotor cover so as to operate smoothly and smoothly, and the leveling rotor is supported and raised and lowered firmly and smoothly by the support means. Can be made.

  Therefore, the rotor cover is reinforced and interlocked with a mechanism that can not only prevent the mud splashed up by the leveling rotor from adhering to the device part but also make the leveling rotor support and lift firmly and smoothly. The structure can be obtained easily.

It is a side view showing the whole riding type paddy field machine. It is a side view which shows a paddy field working apparatus. It is a front view which shows a paddy field working apparatus. It is a top view which shows the drive structure of a paddy field working apparatus. It is a top view which shows the support structure of a grounding float and a leveling rotor. It is sectional drawing which shows the transmission means which transmits motive power to the left leveling rotor. (A) is a side view showing a state where the leveling rotor of the left support means is lowered, and (b) is a side view showing a state where the leveling rotor of the left support means is raised. (A) is a side view showing a state where the leveling rotors of the left support means and the right support means are lowered, and (b) is a side view showing a state where the leveling rotors of the left support means and the right support means are raised. is there. It is a front view which shows a left support means and a right support means. It is a block diagram which shows the raising / lowering control of a paddy field working apparatus and a leveling rotor. It is explanatory drawing which shows the passage trace of the rim | limb of a rear wheel. It is explanatory drawing which shows the positional relationship of the passage trace of a rim | limb, and the recessed part of a leveling rotor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the entire riding paddy field work machine according to an embodiment of the present invention. As shown in this figure, the riding paddy field working machine according to the embodiment of the present invention has a pair of left and right steering operations and front wheels 1 and 1 that can be driven and a pair of left and right rear wheels 2 and 2 that can be driven. A self-propelled vehicle equipped with a paddy field work device 10 connected to the rear part of the body frame 3 of the self-propelled vehicle via a link mechanism 4 and a fertilizer tank 21 provided at the rear part of the self-propelled vehicle body is equipped. The fertilizer application device 20 is provided.

This riding type paddy field working machine performs seedling planting work and fertilization work for supplying fertilizer to planted seedlings.
That is, the self-propelled vehicle includes an engine 5, a transmission case 6, a front wheel drive case 7 that supports a pair of left and right front wheels 1 and 1, and a rear wheel drive that supports a pair of left and right rear wheels 2 and 2. A pair of left and right front wheels is provided that includes a case 8 and transmits the driving force output from the engine 5 to a front wheel drive case 7 and a rear wheel drive case 8 via a traveling transmission (not shown) located inside the mission case 6. 1 and 1 and a pair of left and right rear wheels 2 and 2 are driven to travel. The self-propelled vehicle includes a boarding type driving unit 9 equipped with a driver's seat 9a provided at the rear of the vehicle body, and is of a boarding type so that the driver can get on and operate the driving unit 9. The self-propelled vehicle includes a reserve seedling storage device 30 provided on both sides of the front portion of the vehicle body. The left and right spare seedling storage devices 30 are provided with spare seedling shelves 30a provided in four upper and lower stages, and each spare seedling shelf 30a is placed with a spare mat-like seedling one by one.

  The link mechanism 4 is swung up and down with respect to the vehicle body frame 3 by the elevating cylinder 31, so that the paddy field work apparatus 10 is positioned below the four grounding floats 11 and one The grounding sensor float 12 (see FIG. 4) is moved up and down to a lowering working position where the grounding surface T touches the surface T, and an ascending non-working position where each grounding float 11 and the grounding sensor float 12 rises high from the surface T.

  When the paddy field work device 10 is lowered to the lowered work position and the self-propelled vehicle travels, the paddy field work device 10 is driven by the driving force from the engine 5 and is arranged in the vehicle body lateral direction at the rear portion of the paddy field work device 10. Seedlings are planted on the rice field T by the eight seedling planting mechanisms 13 (see FIGS. 2 and 4).

  As shown in FIG. 1, the fertilizer application device 20 includes the fertilizer tank 21, a fertilizer feeding mechanism 22 connected to the lower portion of the fertilizer tank 21, and a blower opening communicated with a fertilizer discharge portion of the fertilizer feeding mechanism 22. The electric blower 23 is provided. The fertilizer feeding mechanism 22 includes eight fertilizer discharge ports arranged in the lateral direction of the vehicle body. Each fertilizer discharge port of the fertilizer feeding mechanism 22 is provided with a fertilizer supply hose 25 corresponding to one of the eight grooving fertilizers 24 (see FIG. 2) located in the lower part of the paddy field work apparatus 10 in the vehicle body lateral direction. Connected through. The fertilizer feeding mechanism 22 is driven by the driving force extracted from the transmission system that transmits the driving force from the traveling transmission to the rear wheel drive case 8.

  That is, the fertilizer application device 20 feeds the granular fertilizer stored in the fertilizer tank 21 from the fertilizer tank 21 to each fertilizer discharge port by the fertilizer feed mechanism 22, and supplies the fertilizer fed to each fertilizer discharge port by the electric blower 23. The fertilizer supply hose 25 is supplied by the conveying air. Each fertilizer supply hose 25 supplies the supplied fertilizer to the corresponding grooving fertilizer 24 by the conveyance wind from the electric blower 23. Each grooving fertilizer 24 forms a groove in the field surface T near the planted seedling by the corresponding seedling planting mechanism 13, and supplies fertilizer from the fertilizer supply hose 25 to the formed groove. Thereby, the fertilizer application apparatus 20 supplies a fertilizer near the side of each planting seedling, as the paddy field operation apparatus 10 performs the seedling planting operation of Hachijo.

The paddy field working apparatus 10 will be described in detail.
FIG. 2 is a side view showing the paddy field working apparatus 10. FIG. 3 is a front view showing the paddy field working apparatus 10. As shown in these drawings and FIG. 4, the paddy field working apparatus 10 includes the eight seedling planting mechanisms 13, the four grounding floats 11, the one grounding sensor float 12, and a square steel pipe that faces the vehicle body sideways. A frame 14 configured with a main frame 14a made of a material, and a single seedling platform 15 provided in an inclined posture located on the rear side of the vehicle body on the lower end side above the front portion of the frame 14 are provided.

  As shown in FIGS. 2 and 4, the frame 14 of the paddy field work apparatus 10 includes the main frame 14a and a feed case 16 attached to the central portion of the main frame 14a in the lateral direction of the vehicle body. Four planting drive cases 17 extending from the vehicle body rearward. The four planting drive cases 17 are arranged at a predetermined interval in the lateral direction of the vehicle body.

  The eight seedling planting mechanisms 13 are arranged so as to be located one by one on both lateral sides of the rear end portion of each planting drive case 17. Each seedling planting mechanism 13 is rotatably supported by the rear end portion of the corresponding planting drive case 17. Each seedling planting mechanism 13 includes a rotary rotor 13b that is rotatably supported by a planting drive case 17 via a rotary support shaft 13a, and a planting arm 13c that is rotatably provided at both ends of the rotary rotor 13b. Configured. Each seedling planting mechanism 13 is driven by a driving force from a work transmission 6a provided inside the transmission case 6 of the self-propelled vehicle. That is, the output of the work transmission 6a of the self-propelled vehicle is input to the feed case 16 via the rotating shaft 32 (see FIG. 1), and the driving force input to the feed case 16 is transmitted from the feed case 16 via the transmission shaft 33. This is transmitted to the input shaft 17 a of the planting drive case 17, and the driving force of this input shaft 17 a is transmitted to the rotary support shaft 13 a via the transmission chain 34. When each seedling planting mechanism 13 is driven, the tip of the planting claw 13d provided on each planting arm 13c draws a rotation trajectory and reciprocates vertically between the lower end of the seedling table 15 and the surface T. One seedling is moved from the lower end of the mat-like seedling placed on the seedling stage 15 alternately by the planting claws 13d of one planting arm 13c and the planting claws 13d of the other planting arm 13c. A seedling planting exercise is carried out in which the seedling is brought into the rice field T and planted.

  The work transmission 6a includes an inter-stock transmission unit (not shown). The inter-strain shifting unit changes the rotational speed of the driving force transmitted to the feed case 16 by changing the speed, thereby changing the driving speed of the paddy field work device 10. Change the distance (between stocks) in the direction of travel.

  The seedling placing stand 15 includes eight seedling placing portions 15a arranged in the lateral direction of the vehicle body. The seedling stage 15 is reciprocated in the lateral direction of the vehicle body in conjunction with the seedling planting movement of each seedling planting mechanism 13 by a seedling lateral feed mechanism 35 provided in the feed case 16, and the mat-like seedlings by each seedling planting mechanism 13 are transferred. The seedling planting mechanism corresponding to the mat seedlings placed on each seedling placement part 15a so that the seedlings are taken out from the lower end of the mats from one end side to the other end side in the lateral direction of the mat-like seedlings 13 in the lateral direction of the vehicle body.

  FIG. 5 is a plan view showing a support structure for the grounding float 11 and the grounding sensor float 12. As shown in FIG. 10 and FIG. 10, each ground float 11 and ground sensor float 12 includes a mounting bracket 11 a or 12 a provided at an upper portion on the rear end side. The mounting bracket 11a or 12a of each grounding float 11 and grounding sensor float 12 is rotated around the axis P by a pair of left and right support arms 37, 37 extending rearwardly of the vehicle body from a single float support shaft 36 facing the vehicle body. It is supported freely. The float support shaft 36 is rotatably supported by the frame 14 of the paddy field work apparatus 10.

  Therefore, each grounding float 11 and grounding sensor float 12 are supported so as to swing up and down separately around the axis P with respect to the frame 14 of the paddy field work apparatus 10. The front end side of each grounding float 11 and grounding sensor float 12 is connected to the frame 14 of the paddy field work device 10 via a link mechanism (not shown) so as to be lifted and lowered. When it is raised, it is suspended and supported by the link mechanism so as not to hang down from the frame 14.

  As shown in FIGS. 5 and 10, the float support shaft 36 has a planting depth adjustment lever that is extended so as to be integrally rotatable from an intermediate portion in the lateral direction of the vehicle body toward the back side of the seedling platform 15. 40. By adjusting the planting depth adjusting lever 40 around the axis of the float support shaft 36 along the guide groove of the lever guide 41 (see FIG. 5), the float support shaft 36 is moved relative to the frame 14. By rotating and swinging each support arm 37 up and down, the height of attachment to the frame 14 on the rear end side of each ground float 11 and ground sensor float 12 can be changed. By engaging the planting depth adjustment lever 40 in the positioning recess provided in the lever guide 41, the planting depth adjustment lever 40 is locked by the lever guide 41 at the adjustment position to fix the float support shaft 36. In addition, the rear end side of each ground float 11 and ground sensor float 12 can be maintained against the ground reaction force acting on the ground float 11 and ground sensor float 12 at a changed mounting height.

  That is, the grounding float 11 and the grounding sensor float 12 support the paddy field work device 10 at a ground level corresponding to the operation position of the planting depth adjusting lever 40, and planting depth by the eight seedling planting mechanisms 13. The planting depth corresponding to the operation position of the planting depth adjusting lever 40 is set. The planting depth adjusting lever 40 is adjusted by swinging around the axis of the float support shaft 36 and locked by the lever guide 41, so that the paddy field work apparatus 10 set by each grounding float 11 and grounding sensor float 12 can be used. The ground height can be changed and set, and the planting depth by the eight seedling planting mechanisms 13 can be changed and set.

  As shown in FIG. 10, a planting depth detection sensor 42 linked to the front end side of the ground sensor float 12 via the interlocking rod 18 is provided in the paddy field work apparatus 10. An electromagnetic operation portion of the operation valve 44 of the elevating cylinder 31 is linked to the control device 43 linked to the planting depth detection sensor 42.

The planting depth detection sensor 42 is composed of a rotary potentiometer in which the operation arm 42a is interlocked with the interlocking rod 18, and the height from the surface T to the frame 14 of the paddy field work apparatus 10 with the ground sensor float 12 as the ground sensor. And the detection result is output to the control device 43.
That is, when the height of the paddy field work apparatus 10 with respect to the ground changes due to the front-rear inclination of the self-propelled vehicle, the magnitude of the ground reaction force acting on the front end side of the ground sensor float 12 changes and the ground sensor float 12 changes. Is moved up and down with respect to the frame 14 around the axis P, and the interlocking rod 18 is moved up and down to swing the operation arm 42a of the planting depth detection sensor 42. Therefore, the planting depth detection sensor 42 detects the planting depth of the seedling planting mechanism 13 based on the height relative to the frame 14 on the front end side of the ground sensor float 12.

  The control device 43 is configured using a microcomputer, and includes an elevation control means 46. The lift control means 46 detects the height of the frame 14 of the paddy field work apparatus 10 based on the detection result of the planting depth detection sensor 42, and operates the operation valve 44 based on the height of the ground to operate the lift cylinder. 31 is operated, and the paddy field work device 10 is lifted and lowered so that the height from the surface T of the frame 14 of the paddy field work device 10 becomes the set ground height.

  Therefore, even if the self-propelled vehicle is tilted back and forth, the paddy field work device 10 has the height from the surface of the frame 14 set by the elevation control by the elevation control means 46 using the ground sensor float 12 as the ground sensor. The seedling planting is performed in such a state that the planting depth by the eight seedling planting mechanisms 13 is equal to or substantially equal to the set planting depth set by the planting depth adjusting lever 40. Do the work.

  The lift lever 47 shown in FIG. 10 operates a rotary potentiometer 48 and outputs a command such as an ascending / descending command to the control device 43 by the rotary potentiometer 48. The device 10 is moved up and down. The control sensitivity setting unit 49 shown in FIG. 10 is for changing and adjusting the control sensitivity of the lifting control of the paddy field work apparatus 10 by the lifting control means 46 to the insensitive side or the sensitive side.

The grounding sensor float 12 has a grounding area larger than the grounding area of the grounding float 11 located on both sides of the grounding sensor float 12 and is configured to stably ground so as not to enter a local recess of the surface T. is there. For this reason, although the ground sensor float 12 is larger than the ground float 11, the front and rear lengths of the paddy field work machine as a whole are reduced.
That is, as shown in FIG. 5, the front end 12b of the ground sensor float 12 is disposed on the front side of the vehicle body with respect to the front end 11b of the ground float 11 located on both sides of the ground sensor float 12, and the ground sensor float 12 and Four grounding floats 11 are arranged. As a result, the front end side portion of the ground sensor float 12 that protrudes toward the front of the vehicle body from the ground float 11 is located at a position that is located on the vehicle interior side of the rear wheel 2, and the ground sensor float 12 is connected to the ground float 11. Is allowed to be placed close to the rear wheel 12 on the rear side of the rear wheel 2 of the self-propelled vehicle, and the paddy field work apparatus 10 can be connected close to the self-propelled vehicle.

  As shown in FIGS. 3, 4, and 5, the paddy field work device 10 is provided with a leveling rotor provided on the front side of a pair of grounding floats 11 and 11 located behind the self-propelled vehicle and on the left side of the grounding sensor float 12. 50, a ground leveling rotor 50 provided in front of the pair of grounding floats 11 and 11 located behind the self-propelling vehicle and on the right side of the grounding sensor float 12, and behind the self-propelling vehicle and grounding A leveling roller 90 provided on the front side of the sensor float 12 is provided.

  As shown in FIGS. 2 and 5, the left and right leveling rotors 50 are arranged in a state where the rear end of the leveling rotor 50 is located on the rear side of the vehicle body with respect to the front end 12 b of the ground sensor float 12.

  As shown in FIGS. 2 to 5, the left leveling rotor 50 includes a transmission case 61 connected across the left end of the rotation support shaft 51 of the leveling rotor 50 and the planting drive case 17, and the rotation support shaft 51 of the leveling rotor 50. It is supported by the frame 14 of the paddy field work device 10 through a pair of left and right left support means 70L, 70L connected over the main frame 14a.

  As shown in FIGS. 2 to 5, the right leveling rotor 50 includes a transmission case 61 connected across the right end of the rotation support shaft 51 of the leveling rotor 50 and the planting transmission case 17, and the rotation support shaft 51 of the leveling rotor 50. It is supported by the frame 14 of the paddy field work device 10 through a pair of right and left right support means 70R, 70R connected over the main frame 14a.

  The pair of left and right left support means 70L and 70L and the pair of right and left right support means 70R and 70R are arranged in a direction along the vehicle body lateral axis X of the leveling rotor 50. Of the pair of left and right left support means 70L, 70L, the left support means 70L on the left side is connected across the middle portion of the rotation support shaft 51 of the left leveling rotor 50 and the main frame 14a. Of the pair of left and right left support means 70L, 70L, the right left support means 70L is connected across the right end of the left leveling rotor 50 and the main frame 14a. Of the pair of left and right right support means 70R, 70R, the left right support means 70R is connected across the left end of the right leveling rotor 50 and the main frame 14a. Of the pair of right and left right support means 70R, 70R, the right support means 70R on the right side is connected across the middle portion of the rotation support shaft 51 of the right leveling rotor 50 and the main frame 14a.

  FIG. 6 is a cross-sectional view showing the transmission means 60 that transmits power to the left leveling rotor 50. As shown in FIG. 4 and FIG. 4, the transmission means 60 for the left leveling rotor 50 includes the transmission case 61 and the planting drive case 17.

  In the transmission case 61, an input shaft 62 of the transmission case 61 and an input shaft 17a of a planting drive case 17 as a vehicle-side drive shaft provided in the paddy field work device 10 can be integrally rotated and detached via a joint 63. It is connected with the planting drive case 17 by connecting with. The transmission system between the planting drive case 17 and the transmission case 61 includes a shaft portion exposed from the planting drive case 17 of the input shaft 17a of the planting drive case 17 and a portion exposed from the transmission case 61 of the input shaft 62 of the transmission case 61. And is exposed from the planting drive case 17 and the transmission case 61. The transmission case 61 is configured so that the angular shaft end portion 64a of the output shaft 64 of the transmission case 61 and the rectangular cylindrical rotation support shaft 51 of the leveling rotor 50 are engaged with each other so as to be integrally rotatable. 51 is connected.

  Although illustration of the transmission means 60 that transmits power to the right leveling rotor 50 is omitted, the transmission means 60 that transmits power to the right leveling rotor 50 has the same structure as the transmission means 60 that transmits power to the left leveling rotor 50. Configured.

  As shown in FIGS. 4 and 6, the left and right leveling rotors 50 are each provided with a transmission means 60 that includes the transmission case 61 for transmitting the driving force transmitted from the work transmission 6 a provided in the self-propelled vehicle to the feed case 16. And is rotationally driven around the axis X of the rotation support shaft 51 in the lateral direction of the vehicle body.

  As shown in FIGS. 2, 3, 4, and 5, the upper end side of the support arm 92 that rotatably supports both ends of the support shaft 91 of the leveling roller 90 at the lower end portion is connected to the main frame in the frame 14 of the paddy field work apparatus 10. The ground leveling roller 90 is supported so as to be freely movable around the lateral axis Y of the support shaft 91 in the vehicle body side direction. Yes.

  The left and right support arms 92 are supported by the support frame 93 via a connecting pin 94 so as to be vertically swingable. A pressure reducing spring 96 is connected across the upper end side of each support arm 92 and a spring holder 95 provided on the support frame 93, and the upper end side of each support arm 92 is in contact with the height adjusting means 97. It is lowered and biased by the pressure-reducing spring 96 until it is received and supported, and the leveling roller 90 is lowered and biased to the surface T side.

  Therefore, the paddy field work device 10 is prior to the grounding float 11 when the left and right grounding floats 11 are slid even if the track of the self-propelled vehicle is rough due to wheel marks or scraping defects. Leveling by leveling of the leveling rotor 50 was performed, and seedlings were planted in places where the leveling by the leveling rotor 50 and the grounding float 11 was completed, and the grounding sensor float 12 was softened by leveling at the place where the grounding sensor float 12 slid. In order to prevent the situation where the ground sensor float 12 sinks on the surface T, the leveling roller 90 performs leveling by rolling down while rolling, and seedlings are planted in places where the leveling by the leveling roller 90 and the leveling sensor float 12 has been completed. To do.

  The transmission means 60 for the left and right leveling rotors 50 includes a rotor speed changer 65 provided inside the transmission case 61.

  As shown in FIG. 6, the rotor transmission unit 65 includes a high-speed transmission winding transmission 66 and a low-speed transmission winding transmission 67 wound around the input shaft 62 and the output shaft 64 of the transmission case 61. The shaft 62 is provided with a speed switching mechanism 68 provided between the input shaft 62 and a pair of ring bodies 66a and 67a provided so as to wind a high-speed transmission winding transmission 66 and a low-speed transmission transmission transmission 67. It is configured. The high-speed transmission winding transmission 66 and the low-speed transmission transmission transmission 67 are constituted by chains. The pair of ring bodies 66a and 67a are constituted by chain sprockets.

  As shown in FIG. 6, the speed switching mechanism 68 is slidably inserted in the switching body 68 a slidably engaged in the assembly groove 62 a of the input shaft 62 and the support portion 61 a of the transmission case 61. The operation shaft 68b is provided. The operation shaft 68b is provided with a shift arm 68c engaged with one end side of the switching body 68a so as to be relatively rotatable so as to be slidable integrally.

  In the speed switching mechanism 68, when the operating shaft 68b is slid against the high-speed biasing spring 68d, the switching body 68a is slid to the low speed position by the shift arm 68c, and the switching protrusion 68e of the switching body 68a. Is disengaged from the ring body 66a of the high-speed transmission winding transmission 66 and engaged with the ring body 67a of the low-speed transmission winding transmission 67, and the transmission from the input shaft 62 to the ring body 66a is cut off. The winding transmission body 66 is switched to the idle state, the transmission from the input shaft 62 to the ring body 67a is turned on, and the low speed transmission winding transmission body 67 is switched to the transmission state.

  In the speed switching mechanism 68, when the operating shaft 68b is slid by the high speed biasing spring 68d, the switching projection 68e of the switching body 68a is detached from the ring body 67a of the low speed transmission winding transmission body 67, and the high speed transmission. The winding transmission 66 is engaged with the ring body 66a, the transmission from the input shaft 62 to the ring body 67a is cut off, and the low-speed transmission winding transmission body 67 is switched to the idle state. The high-speed transmission state is set so that the high-speed transmission winding transmission 66 is switched to the transmission state.

  The rotor transmission unit 65 is switched to a high speed state so that the leveling rotor 50 is rotationally driven at a high speed by the speed switching mechanism 68 being switched to a high speed on state, and the speed switching mechanism 68 is switched to a low speed on state. Thus, the leveling rotor 50 is switched to the low speed state so as to be driven to rotate at a low speed.

  Accordingly, when the speed switching mechanism 68 is switched to the high speed on state, the transmission means 60 shifts the driving force of the input shaft 62 of the transmission case 61 to the high speed side by the rotor transmission unit 65 to output the transmission case 61. Transmission from the shaft 64 to the rotary support shaft 51 drives the leveling rotor 50 at high speed. When the speed switching mechanism 68 is switched to the low speed on state, the transmission means 60 shifts the driving force of the input shaft 62 of the transmission case 61 to the low speed side by the rotor transmission unit 65 and outputs the output shaft 64 of the transmission case 61. To the rotary spindle 51 to drive the leveling rotor 50 at a low speed.

  The operation shaft 68b of the speed switching mechanism 68 in the transmission means 60 of the left and right leveling rotors 50 is a seedling platform 15 as an example of a part facing the self-propelled vehicle of the paddy field work apparatus 10 as shown in FIGS. Is connected to a shift operation tool 69 swingably provided at an upper portion on the back side of the control cable 69a through an operation cable 69a.

  Therefore, the shifting operation tool 69 can be swung by extending the hand from the driver's seat 9a toward the rear of the vehicle body. By swinging the shifting operation tool 69, the rotor transmission unit 65 of the left and right leveling rotor 50 can be moved. A speed change operation can be performed in a high speed state or a low speed state, and the left grading rotor 50 and the right grading rotor 50 can be shifted so as to be driven at high speed or low speed.

  FIGS. 7A and 7B are side views showing the left support means 70L on the left side of the pair of left and right left support means 70L and 70L. FIGS. 8A and 8B are side views showing the right left support means 70L and the left and right pair of right support means 70R and 70R of the pair of left and right left support means 70L and 70L. FIG. 9 is a front view showing a pair of left and right left support means 70L and 70L and a pair of right and left right support means 70R and 70R. As shown in these drawings, each of the left support means 70L and each of the right support means 70R includes a link mechanism having a support member 71 that rotatably supports the rotation support shaft 51 of the leveling rotor 50 by a shaft support portion 71a. It is configured.

  That is, the link mechanism constituting each left support means 70L and each right support means 70R includes the support member 71, and an intermediate link 72 having one end connected to the support member 71 via a connecting pin 72a so as to be relatively rotatable. A swing link 73 having a free end connected to the other end of the intermediate link 72 via a connecting pin 73a so as to be relatively rotatable, and a free end of the intermediate link 72 via a connecting pin 74a. And an operation link 74 connected to be relatively rotatable.

  The base end side of the swing link 73 is rotatably supported on the upper end side of the support portion 75a of the stay 75 fixed to the main frame 14a via a pivot pin 73b. The base end side of the operation link 74 is rotatably supported by an intermediate portion in the vertical direction of the support portion 75a of the stay 75 via an interlocking shaft 76 that is lateral to the vehicle body.

  FIGS. 7A and 8A are side views showing a state where the leveling rotor 50 of the left support means 70L and the right support means 70R is lowered. As shown in these drawings, the left support means 70L and the right support means 70R descend the leveling rotor 50 when the operation link 74 is operated to swing downward about the axis of the interlocking shaft 76 in the lateral direction of the vehicle body. Manipulate.

  That is, when the operation link 74 is swung downward, the intermediate link 72 is suspended by the operation link 74 and the support member 71 is lowered by the load of the leveling rotor 50. At this time, the intermediate link 72 is suspended while being rotated with respect to the operation link 74 around the axis of the connection pin 74 a for support by the swing link 73, and the transmission case 61 is rotated around the axis of the input shaft 62. It is possible to swing downward. Therefore, the leveling rotor 50 swings downward with respect to the frame 14 together with the transmission case 61 around the axis of the input shaft 62.

  FIGS. 7B and 8B are side views showing a state in which the leveling rotor 50 of the left support means 70L and the right support means 70R is lifted. As shown in these drawings, the left support means 70L and the right support means 70R raise the leveling rotor 50 by operating the operation link 74 swinging upward around the lateral axis of the interlocking shaft 76 in the vehicle body. Manipulate.

  That is, when the operation link 74 is swung upward, the intermediate link 72 is lifted by the operation link 74 and lifts the support member 71 against the load of the leveling rotor 50. At this time, the intermediate link 72 is lifted up while rotating with respect to the operation link 74 around the axis of the connection pin 74 a for support by the swing link 73, and the transmission case 61 is rotated around the axis of the input shaft 62. Enable to swing up. Therefore, the leveling rotor 50 swings up and down with respect to the frame 14 together with the transmission case 61 around the axis of the input shaft 62.

  As shown in FIGS. 7A and 7B, an electric motor having a fan-shaped gear 77 rotatably provided integrally with the operation link 74 of the left support means 70L on the left side and an output gear 78a meshing with the fan-shaped gear 77 is shown. A lift motor 78 comprising: The elevating motor 78 rotates the fan-shaped gear 77 around the axis of the interlocking shaft 76 upward or downward by the output gear 78a, and swings the operation link 74 upward or downward.

  The sector gear 77 is set such that the front end 77a of the fan gear 77 on the vehicle body side is rotated within a rotation range that does not move to the rear side of the vehicle body beyond the axis 76c of the interlocking shaft 76 that is the rotation axis of the sector gear 77. Has been. A lateral side of the sector gear 77 is covered with a side plate-shaped support portion 75 a of the stay 75, and an upper portion of the sector gear 77 is covered with a top plate portion 75 b of the stay 75. As shown in FIGS. 1 and 2, the elevating motor 78 is further provided on the left side of the leveling so as to be located at the rear side of the vehicle body relative to the rear wheel 2 of the self-propelled vehicle and lower than the upper end of the rear wheel 2. The axis of the input shaft 62 that is the vertical swing axis of the transmission case 61 as viewed in the vertical direction of the vehicle body so as to be positioned on the rear side of the vehicle body relative to the rotor 50 and the front end 50b (see FIG. 7) of the right leveling rotor 50. And the vehicle body lateral axis X of the leveling rotor 50. As shown in FIG. 3, the lifting motor 78 is disposed so as to be located at a position off the laterally outer side of the vehicle body from the seedling lateral feed shaft 35 a included in the seedling lateral feed mechanism 35 when viewed in the longitudinal direction of the vehicle body.

  As shown in FIGS. 3 and 9, the interlocking shaft 76 has a pair of adjacent shafts and solid shaft portions 76a connected to the operation links 74 of the left support means 70L and the right support means 70R so as to be integrally rotatable. A solid shaft portion 76a is provided with a cylindrical shaft portion 76b that connects the solid shaft portions 76a so as to be integrally rotatable. Accordingly, the interlocking shaft 76 connects the operation links 74 of the left support means 70L and the right support means 70R so as to be integrally rotatable, so that a pair of left and right left support means 70L, 70L and a pair of left and right right support means 70R, 70R. And the left leveling rotor 50 and the right side by the elevating motor 78 acting on the left support means 70L on the left side so as to move the left leveling rotor 50 up and down. The leveling rotor 50 can be interlocked with the leveling rotor 50 and can be lowered and raised.

  As shown in FIG. 10, a lift motor 78 and a rotor position detection sensor 80 linked to one end side of the linkage shaft 76 are linked to the control device 43. A leveling depth setting device 81 and a set planting depth detection sensor 45 are linked to the control device 43. The control device 43 includes automatic height adjusting means 82.

  The rotor position detection sensor 80 is constituted by a rotary potentiometer in which a rotation operation shaft is linked to the linkage shaft 76, and the frame 14 of the paddy field work device 10 of the left and right leveling rotors 50 based on the rotation position of the linkage shaft 76. The position of the vehicle in the vertical direction of the vehicle is detected, and the detection result is output to the control device 43.

  The setting planting depth detection sensor 45 is constituted by a rotary potentiometer in which a rotary operation shaft is linked to the float support shaft 36, and is set by a planting depth adjustment lever 40 based on the operation position of the float support shaft 36. The set planting depth is detected, and the detection result is output to the control device 43.

  The leveling depth setting unit 81 positions the lower ends 50a of the left and right leveling rotors 50 at a lower arrangement height than the grounding bottom surface 12c of the grounding sensor float 12 at a set interval. The set interval is set as a set leveling depth D (see FIGS. 2 and 10), and the set leveling depth D is output to the control means 43. The leveling depth setting device 81 includes a dial-type operation tool that can be freely rotated. When the operation tool is rotated, the set leveling depth D is changed to a shallow side or a deep side and set.

  The automatic height adjusting means 82 operates the elevating motor 78 on the basis of the detection results of the set planting depth detection sensor 45 and the rotor position detection sensor 80 and the set leveling depth D by the leveling depth setting unit 81. Further, the left and right leveling rotors 50 are adjusted up and down so that the leveling rotor 50 on the right side maintains the set leveling depth D regardless of the change in the height of the ground sensor float 12 with respect to the frame 14.

  Therefore, even if the planting depth adjustment lever 40 is operated to change and adjust the height of the ground sensor float 12 with respect to the frame 14 of the paddy field work apparatus 10, the automatic height adjustment means 82 links the left side by the automatic height adjustment means 82. The left and right leveling rotors 50 maintain the set leveling depth D set by the leveling depth setting unit 81 and perform leveling at the set leveling depth D. To do.

As shown in FIGS. 2, 7, and 8, a left rotor cover 85 </ b> L is provided behind the left leveling rotor 50, and a right rotor cover 85 </ b> R is provided behind the right leveling rotor 50.
Each of the rotor covers 85L and 85R is configured by a curved iron plate formed along the outer periphery of the left or right leveling rotor 50. The left and right rotor covers 85L and 85R receive the mud splashed up by the leveling rotor 50 so as not to hit the grounding float 11 and the like, and drop it on the surface T.

  The left rotor cover 85L and the right rotor cover 85R include a tubular mounting bar 85a provided on the upper end side of the left and right rotor covers 85L and 85R over the entire length of the left and right rotor covers 85L and 85R in the lateral direction of the vehicle body. Yes. The left rotor cover 85L has a mounting bar 85a with a support member 71 of a pair of left and right left support means 70 and a support portion 61a (see FIG. 2) provided in a transmission case 61 for the left leveling rotor 50. By being connected to each other, the left and right pair of left support means 70L, 70L and the transmission case 61 are connected. In the right rotor cover 85R, the mounting bar 85a has a support member 71 of a pair of right and left right support means 70R and 70R, and a support portion 61a (see FIG. 2) provided in the transmission case 61 for the right leveling rotor 50. By being connected over, the pair of right support means 70R, 70R on the left and right and the transmission case 61 are connected.

  As shown in FIGS. 3, 4, and 5, the leveling roller 90 includes a drainage groove 90 a provided in an intermediate portion of the leveling roller 90 in the lateral direction of the vehicle body, and water positioned on the front side of the leveling roller 90 is supplied to the leveling roller 90. Leveling is performed while discharging to the rear side of the leveling roller 90 by the drainage groove 90a so that it does not easily accumulate on the front side of the 90.

  The drainage groove 90a of the leveling roller 90 allows the rotary shaft 32 to enter when the paddy field work apparatus 10 is raised to the lifted non-working position, thereby avoiding contact between the leveling roller 90 and the rotary shaft 32.

  As shown in FIGS. 2 and 4, the height adjusting means 97 acting on each support arm 92 is constituted by a screw shaft that is screwed into a female screw portion that is provided with a support member 98 fixed to a support frame 93. is there. The screw shaft includes an operation knob 97a that can be freely rotated.

  That is, even if the height of the grounding sensor float 12 with respect to the frame 14 is changed and adjusted by the planting depth adjustment lever 40, each support arm is adjusted even if the height of the leveling rotor 50 is adjusted by the automatic height adjustment means 82. By operating the height adjusting means 97 acting on 92 by rotating the operation knob 97a, the stopper position of the height adjusting means 97 with respect to the support arm 92 is changed, and the height adjusting means 97 causes the leveling roller 90 to level. Adjust to the appropriate mounting height.

That is, in the range where the planting depth is from the intermediate position to the shallowest position, the lower end 90b of the leveling roller 90 is higher than the ground bottom surface 12c of the ground sensor float 12 even if the leveling roller 90 is set to the lowest position. Is located.
In the range where the planting depth is from the intermediate position to the deepest position, if the leveling roller 90 is set to the lowest limit position, the lower end 90b of the leveling roller 90 is positioned below the ground bottom surface 12c of the ground sensor float 12. . Accordingly, by operating the height adjusting means 97, the lower end 90b of the leveling roller 90 has a higher arrangement height that is separated from the ground contact bottom 12c of the ground sensor float 12 by the set height D1 and the lower end 50a of the leveling rotor 50. The mounting height of the leveling roller 90 can be adjusted so as to be positioned at a higher arrangement height.

  As shown in FIG. 5, the left support means 70L on the left side of the pair of left and right left support means 70L, 70L is disposed behind the rear wheel 2 on the left side of the self-propelled vehicle, and the pair of left and right right support means 70R, The right support means 70R on the right side of 70R is disposed behind the rear wheel 2 on the right side of the self-propelled vehicle, and the left leveling rotor 50 is passed through the rim 2a of the rim 2a of the left rear wheel 2 (see FIG. 11 and 12), and the right leveling rotor 50 backfills the passage mark A (see FIGS. 11 and 12) of the rim 2a of the right rear wheel 2.

  That is, as shown in FIG. 5, the recessed portion 52 is provided in the middle portion of the left leveling rotor 50 and the right leveling rotor 50, and the shaft support portion 71 a of the support member 71 of the left left support means 70 </ b> L is provided from the leveling rotor 50. The shaft support portion 71a of the support member 71 of the right support means 70R on the right side is arranged in the recessed portion 52 of the left leveling rotor 50 so as not to project outward and form a passage mark on the surface T. It arrange | positions in the recessed part 52 of the right leveling rotor 50 so that it may protrude outside from the rotor 50, and a trace may not be formed in the field surface T.

  FIG. 11 is an explanatory diagram showing a passage mark A of the rear wheel 2. As shown in this figure, when the rim 2a of the rear wheel 2 enters the surface T, a passage mark A of the rim 2a is formed in a groove shape on the surface T, and mud of the rim 2a is formed on both sides of the passage mark A. Raised mud B is generated due to intrusion. FIG. 12 is an explanatory diagram showing the positional relationship between the passage mark A of the rim 2 a and the recessed portion 52 of the leveling rotor 50. As shown in this figure, the leveling rotor 50 moves the rear wheel trace with the passage mark A of the rim 2a entering the recessed portion 52, and presses against the raised mud B by the inner wall surface 52a of the recessed portion 52. Then, the rising mud B is collapsed toward the passage mark A of the rim 2a and enters the passage mark A.

[Another embodiment]
Instead of assembling the elevating motor 78 to the left support means 70L on the left side of the left and right pair of left support means 70L, 70L, the structure is attached to the right support means 70L on the right side of the left and right pair of left support means 70L and 70L. May be implemented. Further, instead of assembling the elevating motor 78 to the left support means 70L, a configuration of assembling to the right support means 70R may be adopted. When the lifting motor 78 is assembled to the right support means 70R, it may be assembled to any of the right support means 70R of the pair of left and right right support means 70R.

  An electric or hydraulic cylinder may be adopted instead of the lifting motor 78, and the lifting motor 78, the cylinder, and the like are collectively referred to as a drive mechanism 78.

  The present invention can also be used for an apparatus provided with a paddy field work apparatus that employs a structure for performing seeding work for supplying seeds to the rice field instead of performing seedling planting work.

2 Rear wheel 10 Paddy field work device 12 Ground sensor float 14 Frame of paddy field work device 17a Drive shaft (input shaft)
46 Lift control means 50 Ground leveling rotor 50b Front end of leveling rotor 52 Recessed portion 60 Transmission means 61 Transmission case 70L Left support means 70R Right support means 71 Support member 72 Intermediate link 73 Swing link 76 Interlocking means (interlocking shaft)
78 Drive mechanism (lifting motor)
85L Left rotor cover 85R Right rotor cover X Horizontal shaft axis of leveling rotor

Claims (6)

Elevating control means is provided at the rear of the self-propelled vehicle, and includes a paddy field work device that is connected to a descending work position and a non-lifting work position so as to be lifted and lowered. A paddy field work machine provided with a grounding sensor float for detecting the height from the paddy field work apparatus to the paddy field work apparatus,
Provided are left and right leveling rotors that can be driven to rotate around a lateral axis of the vehicle body at the rear of the self-propelling vehicle and on the left side of the grounding sensor float and on the right side of the grounding sensor float. ,
Without providing a transmission means connected across the left leveling rotor and the right leveling rotor, a left transmission means for transmitting power to the left leveling rotor is provided, and a right side for transmitting power to the right leveling rotor is provided. Provide transmission means,
The left and right transmission means comprise a transmission case that is connected to a vehicle body lateral drive shaft located in the paddy field working device and the leveling rotor and that can swing up and down around the drive shaft,
A plurality of left support means for supporting the left leveling rotor so as to be movable up and down with respect to the frame of the paddy field work apparatus are arranged side by side in a direction along the vehicle body lateral axis of the left leveling rotor,
A plurality of right support means for supporting the right-hand leveling rotor so as to be movable up and down with respect to the frame of the paddy field work device are arranged side by side in a direction along the vehicle body lateral axis of the right-hand leveling rotor,
Providing interlocking means for interlocking the left support means and the right support means so that the left leveling rotor and the right leveling rotor are moved up and down in conjunction with each other;
A riding-type paddy field work machine provided with a drive mechanism for operating the left-side or right-hand leveling rotor to the upside and downside. The left support means and the right support means are connected across the ground leveling rotor and the frame of the paddy field work device and arranged behind the rear wheel of the self-propelled vehicle,
Provided on the outer peripheral side of the left leveling rotor is a recessed portion into which a support member for supporting the left leveling rotor of the left support means enters,
The riding type paddy field machine according to claim 1, wherein a recessed portion into which a support member for supporting the right leveling rotor of the right support means enters is provided on an outer peripheral side of the right leveling rotor.   The riding type paddy field work machine according to claim 2, wherein the drive mechanism is arranged on the rear side of the vehicle with respect to the rear wheel of the self-propelled vehicle at an arrangement height lower than the upper end of the rear wheel.   The riding type paddy field work machine according to claim 3, wherein the drive mechanism is disposed on the rear side of the vehicle body from the front ends of the left leveling rotor and the right leveling rotor. The left support means and the right support means are a swing link that is supported by a frame of the paddy field working device so as to be swingable up and down, a support member that rotatably supports the leveling rotor, the swing link, and the support member The riding-type paddy field work machine according to any one of claims 1 to 4, comprising a link mechanism having a swingable intermediate link that connects the two. A left rotor cover that covers the rear of the left leveling rotor, and a right rotor cover that covers the rear of the right leveling rotor;
The riding paddy field work machine according to any one of claims 1 to 5, wherein the left rotor cover is connected over the plurality of left support means, and the right rotor cover is connected over the plurality of right support means.

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