JP2012210194A - Paddy field working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy field working machine which can avoid or suppress a projection of a leveling body from a ground float to forward and can cause the leveling body to favorably exert immobilization of mud while being capable of ascending and descending of the leveling body interlocking with the adjustment of ascending and descending of the ground float.SOLUTION: The paddy field working machine wherein the leveling body 26 is arranged in the lateral side of the ground float 11 includes: an attachment part 26b extending the leveling body 26 from a float support shaft 36 in a forward direction of the machine body and integrally and rotatably connected to the float support shaft 36 in a state where the extension end 26t is located at the front side of the machine body relative to the float support shaft 36; and a plate-like leveling part 26a for leveling the ground by extending from the extension end 26t of the attachment part 26b in the backward and downward direction of the machine body.

Description

  In the present invention, a paddy field working unit is connected to the rear part of the traveling machine body so as to be movable up and down, and is attached to the rice field work part so as to be rotatable around a lateral axis of the machine body and fixed at a rotation adjustment position. The present invention relates to a paddy field work machine provided with a float support shaft and a grounding float supported on the extended end side of a support member that extends from the float support shaft so as to be integrally rotatable in the rearward direction of the machine body.

  Conventionally, there has been a paddy field machine described in Patent Document 1. In the thing described in patent document 1, the planting depth adjustment axis | shaft supported by the seedling planting part frame so that rotation is possible is provided, the upper grooved tool support link, The float is supported through the groove forming tool support link, the groove forming tool, and the support shaft, and the planting depth adjusting shaft is configured to move up and down by rotating the planting depth adjusting shaft. The leveling rake is attached to the mounting pipe that is fixed to

JP 2004-166550 A

  When the leveling body is disposed on the lateral side of the grounding float, it is possible to avoid or suppress forward protrusion of the leveling body from the grounding float. If the leveling body is attached to a float spindle that adjusts the level of the grounding float, the leveling body will float if the mounting height of the grounding float is changed to change the working depth such as the seedling planting depth by the paddy field working section. By receiving the turning operation by the support shaft, the lower end of the leveling body can be naturally raised and lowered in the same raising and lowering direction as that of the grounding float. When a leveling body that simply extends downward from the float support shaft is adopted, the rear end of the leveling body is not projected rearward from the laterally protruding portion of the grounding float. If the position control is performed, the ground surface of the leveling body becomes a steep angle or the front and rear length of the leveling body becomes short, and the mud is not easily pressed down by the leveling body.

  An object of the present invention is to prevent or suppress the forward protrusion of the leveling body from the grounding float, and to lift and lower the leveling body in conjunction with the lifting and lowering adjustment of the grounding float. It is an object of the present invention to provide a paddy field work machine that can suppress mud well even if the position is restricted, and that can easily prevent mud accumulation on the leveling body.

According to the first aspect of the present invention, a paddy field working part is connected to the rear part of the traveling machine body so as to be movable up and down, and the paddy field working part can be pivotally adjusted around the horizontal axis of the machine body and can be fixed at a pivotal adjustment position. In a paddy field work machine provided with an attached float support shaft and a grounding float supported on the extending end side of a support member that extends from the float support shaft so as to be integrally rotatable in the rearward direction of the machine body,
Place a leveling body on the lateral side of the grounding float,
A mounting portion that is connected to the float support shaft so as to freely rotate integrally with the leveling body extending from the float support shaft toward the front side of the machine body and an extension end positioned on the front side of the machine body from the float support shaft; And a plate-shaped leveling portion that extends downward from the extension end of the mounting portion to the rear of the fuselage and levels.

  According to the configuration of the first aspect of the present invention, since the leveling body is arranged on the lateral side of the grounding float, it is possible to avoid or suppress the forward projection of the leveling body from the grounding float. A mounting portion that extends forward from the float spindle and the extension end is positioned on the front side of the fuselage with respect to the float spindle, and is connected to the float spindle so as to be integrally rotatable. Since the leveling body is configured with a plate-shaped leveling part that extends downward and rearward, the ground leveling body can be moved to the float support shaft by rotating the float support shaft to adjust the grounding float. The lower end of the plate leveling unit moves up and down in the same lifting direction as that of the grounding float in conjunction with the lifting and lowering adjustment of the grounding float. The height relative to the grounding float on the lower end side can be kept unchanged or not so much.

  Since the ground leveling body is configured by including a mounting portion extending forward from the float support shaft and a plate leveling portion extending downward from the extending end of the mounting portion toward the rear of the body, Even if the position of the rear end of the plate leveling part is restricted such that the rear end side of the leveling part does not protrude rearward from the laterally protruding part of the grounding float, the front end of the plate leveling part is not the extension end of the mounting part. Because it is located at a location that is located on the front side of the fuselage with respect to the float support shaft, it is possible to make the ground inclination angle of the plate leveling part relatively gentle, and the longitudinal length of the plate leveling part can be reduced. It can be made relatively long, and the pressing of the mud by the plate-shaped leveling portion can be effectively performed by the gentle inclination angle and the long front-rear length.

  Since the plate leveling part extends from the extension end of the mounting part in the downward direction toward the rear of the fuselage, the connecting part of the plate leveling part for connecting the plate leveling part and the mounting part is the front end of the plate leveling part. And even if mud is placed on the upper surface side of the plate leveling unit, the mud placed on the plate leveling unit may cause a flow failure due to the connecting part. It is difficult to receive and can be smoothly removed from the plate leveling section.

  Therefore, the ground leveling body can be provided in a compact manner so that it does not protrude forward or not so much from the grounding float, and even if the grounding float is adjusted up and down, the ground leveling part is adjusted against the grounding float on the lower end side of the plate leveling part. It is possible to obtain a state where there is no change in height or not so much, and there is no difference in level between the passage of the grounding float and the passage of the plate leveling section, regardless of changes in the working depth. Even if the position of the rear end of the plate leveling unit is regulated, the leveling with a good finish in which the mud mud is effectively pressed by the plate leveling unit can be performed. Even if the longitudinal length of the plate leveling portion is increased, mud accumulation in the plate leveling portion is easily suppressed or avoided.

  In the second aspect of the invention, the position of the rear end of the projecting portion of the front side portion of the grounding float that projects laterally from the vehicle body and the position of the rear end of the plate-shaped leveling unit are the same or substantially the same in the longitudinal direction of the vehicle body.

  When the rear end of the leveling body is located forward relative to the rear end of the projecting part of the front side of the grounded float, the muddy water that flows backward between the projecting part of the grounded float and the leveling body is rearward If there is a grounded float projecting part near one side of the exited part and there is no space leveling on the other side, there will be a grounded float projecting part and leveling. Turbulence is likely to occur due to diffusion behind the leveling body due to the momentum when it escapes from between the bodies. Also, when the leveling body protrudes long from the protruding part of the grounding float to the rear side, if the muddy water that flows backward between the protruding part of the grounding float and the leveling body escapes backward from there, There is a rear part of the leveling body near one side, and there is a space where the projecting part of the grounding float has disappeared on the other side, so it escapes between the grounding float projecting part and the leveling body. The turbulent flow is likely to occur due to diffusion to the rear of the projecting portion of the grounded float due to the momentum.

  According to the configuration of the second aspect of the invention, the position of the rear end of the projecting portion of the ground float and the position of the rear end of the plate leveling portion of the leveling body are the same or substantially the same in the longitudinal direction of the machine body. Even if the muddy water that flows backward between the part and the leveling body escapes backward from there, there is no projecting part of the grounding float or leveling body near the side of the exited part, or there is not much, Due to the momentum when it escapes from between the protruding part of the grounding float and the leveling body, it flows smoothly backwards and hardly generates turbulent flow, and the occurrence of muddy soil rise and planted seedling turbulence caused by the turbulent flow is generated. Easy to avoid.

  Therefore, even if the leveling body is arranged on the lateral side of the grounding float, it is possible to perform leveling and work with a good finish regardless of whether the muddy water escapes backward from between the leveling body and the protruding part of the grounding float. .

  In the third aspect of the invention, the leveling body is provided between the adjacent grounding floats, and the rear end of the plate leveling part is located at a position where the distance between the grounding floats is minimized in the lateral direction of the machine body. Yes.

  The mud that has entered between the grounding floats moves backward with respect to the grounding float while being pressed by the grounding floats located on both sides, and tends to rise to a high level at the point where the grounding float interval is minimized. According to the configuration of the third invention, since the rear end of the plate leveling portion is located at the position where the distance between the grounding floats is the smallest, even if the mud is going to rise up at the place where the distance between the grounding floats is small. The plate-like leveling portion can press the mud to prevent or suppress the high rise of the mud.

  Therefore, it is possible to perform leveling that provides a good finish that prevents or suppresses the rise of mud that has entered between the grounding floats.

It is a side view which shows the whole paddy field machine. It is a side view which shows a paddy field working part. It is a top view which shows the drive mechanism of a paddy field working part. It is a top view which shows a paddy field working part. (A) is a side view showing the inner side ground contact float and the first leveling body adjusted to the deep planting side, and (b) is the inner side ground contact float and the first adjusted state to the shallow planting side. It is a side view showing a leveling machine. It is a perspective view which shows a 1st leveling body. It is a front view which shows a lever guide. It is a vertical side view which shows a 2nd leveling body. It is a side view which shows a 3rd leveling body. It is a rear view which shows a 3rd leveling body. It is a top view which shows a 3rd leveling body. (A) is a side view in the connection cancellation | release state of a connection mechanism, (b) is a side view in the connection state of a connection mechanism. (A) is a rear view in the connection cancellation | release state of a connection mechanism, (b) is a rear view in the connection state of a connection mechanism. It is a side view which shows the leveling body provided with another implementation structure. It is a rear view which shows the attachment part of the leveling body provided with another implementation structure.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the entire paddy field working machine according to an embodiment of the present invention. The paddy field machine includes a traveling machine equipped with a pair of left and right steering operations and a front wheel 1 that can be driven and a pair of left and right rear wheels 2 that can be driven, and a link mechanism 4 is provided at the rear of the body frame 3 of the traveling machine. And a fertilizer application device 20 equipped with a fertilizer tank 21 provided at the rear of the machine body of the traveling machine.

The paddy field machine performs seedling planting work and fertilization work for supplying fertilizer to the rice field T.
The traveling machine includes an engine 5, a transmission case 6, a front wheel driving case 7 that supports the front wheel 1, and a rear wheel driving case 8 that supports the rear wheel 2, and the power of the engine 5 is transmitted to the transmission case 6. It is transmitted to the front wheel drive case 7 and the rear wheel drive case 8 via a traveling transmission (not shown) located inside to drive the front wheel 1 and the rear wheel 2 to self-travel. The traveling machine includes a boarding type driving unit 9 equipped with a driver's seat 9a provided at the rear of the machine body, and is a boarding type so that the driver can board and operate the driving unit 9. The traveling machine includes a spare seedling storage device 30 provided on both sides of the front part of the machine body. The preliminary seedling storage device 30 includes preliminary seedling shelves 30a provided in four upper and lower stages, and stores the spare seedlings one by one on the preliminary seedling rack 30a.

  The link mechanism 4 is a quadruple link mechanism having an upper link 4a and a lower link 4b. The link mechanism 4 is swung up and down with respect to the machine body frame 3 by an elevating cylinder 31 so that the lower part of the paddy field working unit 10 The paddy field is divided into a descending work position where the five grounding floats 11, 12, 18 positioned side by side in the lateral direction of the vehicle body are in contact with the surface T, and a rising non-working position where the grounding floats 11, 12, 18 are elevated above the field T. The working unit 10 is moved up and down. When the paddy field work unit 10 is lowered to the lowering work position and the self-propelled machine body is caused to travel, the paddy field work part 10 is driven by the power of the engine 5 and is positioned side by side in the lateral direction of the traveling machine body at the rear part of the paddy field work part 10. The seedlings are planted on the rice field T by the eight seedling planting mechanisms 13 (see FIGS. 2 and 3).

  As shown in FIG. 1, the fertilizer application device 20 includes a fertilizer tank 21, a fertilizer feeding mechanism 22 connected to a lower portion of the fertilizer tank 21, and an electric motor in which an air outlet is communicated with a fertilizer discharge portion of the fertilizer feeding mechanism 22. The fertilizer feeding mechanism 22 is configured with a blower 23 and has eight fertilizer discharge ports arranged in the lateral direction of the vehicle body. The fertilizer discharge port of the fertilizer feeding mechanism 22 is connected to eight groove-growing fertilizers 24 (see FIG. 2) positioned in the lateral direction of the vehicle body at the lower part of the paddy field working unit 10 via a fertilizer supply hose 25. The fertilizer feeding mechanism 22 is driven by the power extracted from the transmission system that transmits the power of the traveling transmission to the rear wheel drive case 8.

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

The paddy field working unit 10 will be described.
FIG. 2 is a side view showing the paddy field working unit 10. FIG. 3 is a plan view showing a drive mechanism of the paddy field working unit 10. The paddy field working unit 10 includes eight seedling planting mechanisms 13, five grounding floats 11, 12, and 18, a frame 14 configured to include a main frame 14 a made of a rectangular steel pipe material facing the traveling machine body, and a front portion of the frame 14. Is provided with a seedling stand 15 provided in an inclined posture located on the rear side of the traveling machine body on the lower end side. The paddy field working unit 10 includes a leveling roller 51 and a leveling rotor 50 that can be driven and rotated.

  As shown in FIGS. 2 and 3, the frame 14 of the paddy field working unit 10 includes a feed case 16 attached to the central portion of the main frame 14a in the lateral direction of the traveling machine body, and extends from the main frame 14a toward the rear of the traveling machine body. The four planting drive cases 17 are provided. The planting drive cases 17 are arranged at predetermined intervals in the lateral direction of the traveling machine body.

  The seedling planting mechanism 13 is disposed so as to be positioned one by one on both lateral sides of the rear end portion of the planting drive case 17, and is rotatably supported by the rear end portion of the planting drive case 17. The 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 supported at both ends of the rotary rotor 13b. It is configured. The seedling planting mechanism 13 is driven by the power of a work transmission (not shown) provided inside the mission case 6 of the traveling machine.

  The power of the work transmission of the traveling machine is input to the feed case 16 via the rotary shaft 32, and the power input to the feed case 16 is transmitted from the feed case 16 to the input shaft 17a of the planting drive case 17 via the transmission shaft 33. Then, the power of the input shaft 17a is transmitted to the rotary support shaft 13a via the transmission chain 34. The seedling planting mechanism 13 reciprocates up and down between the lower end of the seedling table 15 and the field surface T with the tip of the planting claw 13d provided on the planting arm 13c drawing a rotation trajectory, and the planting arm 13c One seedling is taken out from the lower end of the seedling placed on the seedling placing stand 15 and planted on the rice field T alternately by the planting claw 13d and the planting claw 13d of the other planting arm 13c.

  The seedling stage 15 includes eight seedling placement units arranged in the lateral direction of the traveling machine body. The seedling placing table 15 is reciprocated in the lateral direction of the traveling machine in conjunction with the seedling planting of the seedling planting mechanism 13 by the seedling lateral feed mechanism 35 provided in the feed case 16, and is transferred from the lower end of the seedling by the seedling planting mechanism 13. The seedling placed on the seedling placement section is transferred to the seedling planting mechanism 13 in the lateral direction of the traveling body so that the seedling is taken out from one end side to the other end side in the lateral direction of the seedling.

  As shown in FIGS. 2, 4, and 5, the grounding floats 11, 12, and 18 are provided with mounting brackets 11a, 12a, and 18a provided at the upper part on the rear end side. Mounting brackets 11a, 12a, and 18a for the grounding floats 11, 12, and 18 are a pair of left and right arm-shaped support members 37 that extend from a single steel pipe float support shaft 36 in the lateral direction of the traveling body toward the rear of the traveling body. It is supported on the extending end side so as to be swingable up and down around the axis P.

  The grounding floats 11, 12, and 18 are supported so as to swing vertically around the axis P with respect to the frame 14. The front end sides of the grounding floats 11, 12, and 18 are connected to the frame 14 through a link mechanism (not shown) so as to be movable up and down, and when the paddy field working unit 10 is raised to the raised non-working position, the frame 14 It is supported by the link mechanism so that it does not drastically sag.

  As shown in FIG. 4, among the five grounding floats 11, 12, and 18, the center grounding float 12 located at the center in the lateral direction of the traveling machine body and the left and right adjacent to both lateral sides of the center grounding float 12 The inner side ground contact float 11 has front side portions 11F and 12F located on the front side of the traveling body from the seedling planting location by the seedling planting mechanism 13 and a rear side portion 11R located on the lateral side of the seedling planting location by the seedling planting mechanism 13. , 12R. Protruding portions 11b and 12b are provided on the left and right sides of the front side portions 11F and 12F of the center grounding float 12 and the left and right inner side grounding floats 11 so as to project laterally with respect to the rear side portions 11R and 12R. The float 12 and the left and right inner side ground contact floats 11 level the seedling planting location by the seedling planting mechanism 13 by the left and right projecting portions 11b and 12b of the front side portions 11F and 12F.

  Of the five grounding floats 11, 12, and 18, the left and right outer side grounding floats 18 that are located laterally outside the left and right inner side grounding floats 11 are located on the front side of the traveling body from the seedling planting location by the seedling planting mechanism 13. A front side portion 18F and a rear side portion 18R located on the lateral side of the seedling planting place by the seedling planting mechanism 13 are provided. Protruding portions 18b are provided on the laterally outer sides of the front side portion 18F of the left and right outer side grounded floats 11 so as to project laterally from the rear side portion 18R. The left and right outer side grounded floats 18 are arranged on the front side portion 18F. The seedling planting portion by the seedling planting mechanism 13 is leveled by the protruding portion 18b.

  A first leveling body 26 is disposed on both lateral sides of the center grounding float 12 and between the center grounding float 12 and the inner side grounding float 11. When the inner auxiliary wheel located on the inner side of the traveling machine body from the rear wheel 2 is mounted on the traveling machine body, the first leveling body 26 performs a leveling action on the passing trace of the inner auxiliary wheel.

  The first leveling body 26 is fixed to the float support shaft 36. FIG. 6 is a perspective view of the first leveling body 26 in a removed state. As shown in FIGS. 4, 5, and 6, the first leveling body 26 has a front end side extending from the float support shaft 36 toward the front of the traveling machine body, and an extension end 26 t positioned on the front side of the travel machine body from the float support shaft 36. In this state, a flat plate-like mounting portion 26b connected to the float support shaft 36 and a plate-shaped leveling portion 26a extending downward from the extending end 26t of the mounting portion 26b to the traveling machine body are provided. .

  The attachment portion 26b is fixed to the lower surface side of the float support shaft 36 by fastening with a pair of left and right lashing bands 28, 28. One end portion 28a of the pair of left and right lashing bands 28, 28 is locked to a connecting hole 26c provided in the attachment portion 26b, and the other end portion 28b is connected to a bolt hole 26d provided in the attachment portion 26c and the lashing band 28. It is connected to the mounting portion 26b by a connecting bolt 29 that is mounted across the provided nut 28c. The plate leveling portion 26a includes a front side portion 26F whose upper end is connected to the extending end 26t of the attachment portion 26b, and a leveling portion main body 26R extending from the lower end of the front side portion 26F downward to the traveling machine body. It is.

  The plate leveling portion 26a has a rake shape in which the front side portion 26F is a vertical plate shape facing the vertical direction of the traveling aircraft body, and the ground leveling portion main body 26R includes a plurality of kerfs 26s facing the traveling aircraft body in the lateral direction. It is formed as follows. The plate-like leveling portion 26a includes reinforcing ribs 27 formed along the cut grooves 26s on both sides of the cut grooves 26s. Each reinforcing rib 27 extends over the leveling portion main body 26R and the front side portion 26F.

  The front end side of the center grounding float 12 is linked to an elevation control mechanism. That is, the center grounding float 12 detects a change in the height of the paddy field working unit 10 with respect to the ground, and the seedling planting depth by the seedling planting mechanism 13 is maintained at the set depth or almost the set depth regardless of the front / back inclination of the traveling machine body. As described above, it functions as a sensor float that allows the paddy field working unit 10 to be lifted and lowered by the lift control mechanism.

  The float support shaft 36 is provided with a planting depth adjustment lever 40 that is extended so as to be integrally rotatable from an intermediate portion in the lateral direction of the traveling machine body toward the back side of the seedling platform 15. The planting depth adjusting lever 40 is inserted through a guide groove 42 provided in a lever guide 41 as shown in FIG. 7 fixed to the main frame 14a. The float support shaft 36 is pivotally adjusted by the swinging operation of the planting depth adjusting lever 40 around the axis of the float support shaft 36 along the guide groove 42 of the lever guide 41 so that the support member 37 is moved. By swinging up and down, the five grounding floats 11, 12 and 18 are adjusted up and down with respect to the frame 14. The float support shaft 36 is fixedly supported at the rotation adjustment position by engaging the planting depth adjusting lever 40 with the positioning recess 43 provided on the lever guide 41 on the side of the guide groove 42. The member 37 is fixed so as not to be lifted and lowered by the grounding reaction force applied to the grounding floats 11, 12, and 18, and the five grounding floats 11, 12, and 18 are fixed to the lift adjustment position.

  Fig.5 (a) is a side view which shows the inner side grounding float 11 and the 1st leveling body 26 of the state adjusted to the deep planting side. As shown in this figure, when the planting depth adjusting lever 40 is swung in the swinging direction A and fixed in the adjusting position, the float support shaft 36 is swung in the rotating direction U and rotated. The support member 37 is fixed to the adjustment position by swinging to the rising side and fixed to the adjustment position, and the mounting height of the inner side ground contact float 11 to the frame 14 is increased. At this time, the center grounding float 12 and the outer side grounding float 18 are also turned up and down by the float support shaft 36 in the same manner as the inner side grounding float 11, and the center grounding float 12 and the outer side grounding float 18 are attached to the frame 14. The height increases and the seedling planting depth by each seedling planting mechanism 13 increases. At this time, the first leveling body 26 is rotated in the rotation direction U by the float support shaft 36, the lower end side of the plate-shaped leveling portion 26a is raised, and the inner side ground contact float 11 on the lower end side of the plate-shaped leveling portion 26a. And the position in the vertical direction of the machine body with respect to the center grounding float 12 does not change so much from that before the seedling planting depth is deepened.

  FIG. 5B is a side view showing the inner side ground contact float 11 and the first leveling body 26 adjusted to the shallow planting side. As shown in this figure, when the planting depth adjusting lever 40 is swung in the swinging direction B and fixed at the adjusting position, the float support shaft 36 is swung in the rotating direction D and rotated. The support member 37 is fixed to the adjustment position by swinging downward and fixed to the adjustment position, and the height of the inner side ground contact float 11 attached to the frame 14 is lowered. At this time, the center grounding float 12 and the outer side grounding float 18 are also turned up and down by the float support shaft 36 in the same manner as the inner side grounding float 11, and the center grounding float 12 and the outer side grounding float 18 are attached to the frame 14. The height is lowered, and the seedling planting depth by each seedling planting mechanism 13 is shallow. At this time, the first leveling body 26 is rotated in the rotation direction D by the float support shaft 36, the lower end side of the plate-shaped leveling portion 26a is lowered, and the inner side ground contact float 11 on the lower end side of the plate-shaped leveling portion 26a. And the position in the vertical direction of the machine body with respect to the center grounding float 12 does not change much from that before the seedling planting depth becomes shallow.

  As shown in FIGS. 4, 5 (a), and 5 (b), the first ground leveling body 26 is controlled regardless of whether the center grounding float 12 and the inner side grounding float 11 are lifted or lowered by rotating the float support shaft 36. The position of the rear end 26e of the leveling section main body 26R and the position of the rear ends 11c, 12c in the projecting portions 11b, 12b of the front side portions 11F, 12F of the center grounding float 12 and the inner side grounding float 11 are the same in the longitudinal direction of the traveling body or Almost identical.

  Accordingly, the first leveling body 26 is leveled between the center grounding float 12 and the inner side grounding float 11 by pressing the surface T from above with the leveling part main body 26R of the plate leveling part 26a. The first leveling body 26 does not change much in the vertical direction with respect to the inner side grounding float 11 and the center grounding float 12 on the lower end side of the leveling part main body 26R regardless of the change in the seedling planting depth. Leveling is performed while suppressing the occurrence of a step between the leveling location by the side grounding float 11 and the center grounding float 12 and the leveling location by the first leveling body 26. The first leveling body 26 includes the position of the rear end 26e of the leveling section main body 26R in the longitudinal direction of the traveling machine body and the rear ends of the projecting portions 11b and 12b in the front side portions 11F and 12F of the inner side grounding float 11 and the center grounding float 12. 11c, 12c in the front-rear direction of the traveling machine body is made the same or substantially the same, and the turbulence caused by the muddy water flowing backward from between the leveling section main body 26R and the front side parts 11F, 12F of the inner side grounding float 11 and the center grounding float 12 Leveling the ground while suppressing the generation of flow.

  As shown in FIG. 4, the second grounding body 60 is arranged between the inner side grounding float 11 and the outer side grounding float 18 on the lateral side of the lateral side of the traveling body of the left and right inner side grounding floats 11. It is installed. FIG. 8 is a longitudinal side view of the second leveling body 60. As shown in this figure, the second leveling body 60 is fixed to the float support shaft 36. The second leveling body 60 has the same configuration as the first leveling body 26.

  That is, the second leveling body 60 is fixed to the float support shaft 36 in a state where the front end side extends from the float support shaft 36 toward the front side of the traveling machine body and the extension end 60t is positioned on the front side of the travel machine body from the float support shaft 36. A flat plate-shaped mounting portion 60b connected by a binding band 61, and a plate-shaped leveling portion 60a extending downward from the extending end 60t of the mounting portion 60b in the rear direction of the traveling machine body are configured. The plate-shaped leveling portion 60a is formed such that the front side portion 60F is a vertical plate that faces the traveling machine body and the leveling portion main body 60R has a rake shape.

  In the second leveling body 60, the float support shaft 36 is rotated and fixed, and the height of the center grounding float 11, the inner side grounding float 12, and the outer side grounding float 18 is fixed to the frame 14 by being fixed at the rotation adjustment position. When changed, like the first leveling body 26, it is rotated by the float support shaft 36, and the lower end side of the plate leveling part 60 b of the second leveling body 60 is the center grounding float 11 and the inner side grounding float 12. Further, the same lifting stroke as that of the center grounding float 11, the inner side grounding float 12, and the outer side grounding float 18 is lifted and lowered in the same lifting direction as that of the outer side grounding float 18.

  As shown in FIGS. 4 and 8, the leveling of the second leveling body 60 is performed regardless of the elevation adjustment of the center grounding float 12, the inner side grounding float 11, and the outer side grounding float 18 by the rotation operation of the float support shaft 36. The rear end 60e of the main part 60R is a location where the distance between the protruding portion 11b of the inner side ground contact float 11 and the outer side ground contact float 18 is minimized.

  Therefore, the second leveling body 60 is leveled by pressing the surface T from above by the leveling part main body 60R of the plate leveling part 60a between the inner side grounding float 11 and the outer side grounding float 18. Regardless of the change in the seedling planting depth, the second leveling body 60 does not change much in the vertical direction of the aircraft relative to the inner side grounding float 11 and the outer side grounding float 18 on the lower end side of the leveling part main body 60R, Leveling is performed while suppressing the occurrence of a step between the leveling location by the inner side ground contact float 11 and the outer side ground contact float 18 and the leveling location by the second leveling body 60. The second leveling body 60 is configured such that the rear end 60e of the leveling section main body 60R is positioned at the minimum position between the projecting portion 11b of the inner side ground contact float 11 and the outer side ground contact float 18, and the projecting portion of the inner side ground contact float 11 The ground is leveled while suppressing the rise of mud that has entered between 11b and the outer side ground contact float 18.

  The plate-like leveling portions 26a, 60a of the first and second leveling bodies 26, 60 extend from the extended ends 26t, 60t of the attachment portions 26b, 60b and have a long length in the front-rear direction. It is elastically deformed relatively easily, such as when it gets on.

  As shown in FIG. 4, a third leveling body 93 is disposed on the lateral outer sides of the left and right outer side ground contact floats 18. As shown in FIGS. 9, 10, and 11, the third leveling body 93 has a support bracket 95 attached to a frame portion 94 that is provided so as to extend outward from the left and right ends of the main frame 14 a. Via a torsion spring 96 so as to be oscillated downward and biased downward.

  The leveling action portion 93A of the third leveling body 93 is arranged in a state overlapping with the transmission case 52 (see FIG. 3) that is transmitted to the leveling rotor 50 in plan view. 93A, when an auxiliary wheel is provided on the lateral outer side of the rear wheel 2 of the traveling machine, leveles the passing trace of the outer auxiliary wheel.

  The support bracket 95 includes an attachment portion 95A for attachment to the frame portion 94, and a U-shaped pivot support portion 95B for pivotally supporting the third leveling body 93 so as to be swingable. The leveling body 93 of No. 3 is a rake-shaped leveling action part 93A, a vertical plate part 93B for attachment integrally connected to the leveling action part 93A, and screwed to the vertical plate part 93B. A U-shaped connecting portion 93 </ b> C that is pivotally supported by a supporting shaft 97 so as to be swingable with respect to the supporting portion 95 </ b> B.

A torsion spring 96 is externally fitted to the support shaft 97, and one end of the torsion spring 96 is brought into contact with the third leveling body 93 so that the other end side of the torsion spring 96 can be locked and held. That is, the other end portion of the torsion spring 96 extends outward through the opening formed in the pivotal support portion 95B, but is configured to be held and held by the spring receiving portion 98 formed in the opening. It is restricted that 93C contacts the pivotal support portion 95B against the biasing force of the torsion spring 96 and the leveling tool 93 freely swings downward.
That is, the third leveling body 93 is supported in a state in which it is moved and urged downward by the urging force of the torsion spring 96 and is held at a predetermined position. By changing the holding position, the downward urging force can be changed and adjusted in three stages.

Further, the leveling action portion 93A is fixed by screwing to the connecting portion 93C, but the screw passage hole 99 provided in the leveling action portion 93A is formed as a long hole in the vertical direction, and the leveling action portion is loosened by loosening the screw. The relative position can be changed by sliding the 93A in the vertical direction, and the predetermined position can be changed and adjusted up and down.
Therefore, it is possible to change and adjust the vertical position and the downward biasing force of the third leveling body 93 according to the state of the field.

  FIG. 12A is a side view of the connection mechanism 70 that detachably connects the paddy field working unit 10 to the link mechanism 4 in a disconnected state. FIG. 12B is a side view of the coupling mechanism 70 in the coupled state. FIG. 13A is a rear view of the connection mechanism 70 in a disconnected state. 13 (b) is a rear view of the coupling mechanism in the coupled state. As shown in these drawings, the connecting mechanism 70 is a cast hitch body 71 whose upper end side is pivotally supported by the rear end portion of the upper link 4a of the link mechanism 4 and whose lower end side is supported by the rear end portion of the lower link 4b. And a connecting frame 72 provided on the frame 14 of the paddy field work unit 10 so as to be detachably connected to the hitch body 71.

  The upper end side of the hitch body 71 and the connecting frame 72 are detachable by a hook 73 having an upward opening provided at the upper end portion of the hitch body 71 and a locking body 74 made of a steel pipe material facing the machine body provided at the connecting frame 72. Connect to That is, the latching body 74 is dropped into the hook portion 73 from above and engaged. Positioning bodies 75 extending downward from the connection frame 72 are provided on both lateral sides of the locking body 74. The guide portions 75a provided at the distal ends of the left and right positioning bodies 75 are configured such that the distance between the guide portions 75a increases toward the distal end side of the guide portions 75a. Positioning with respect to the hook portion 73 is facilitated, and as the engagement of the locking body 74 to the hook portion 73 proceeds, the hook portion of the locking body 74 is brought into contact with the lateral outer end of the guide portion 75a. The locking body 74 is guided so that the position becomes a predetermined position in the lateral direction with respect to 73. When the engaging depth of the locking body 74 with respect to the hook portion 73 reaches a predetermined depth, the left and right positioning bodies 75 are brought into contact with the base end side portion 75b of the positioning body 75 and the stopper portion 71a of the hitch body 71. The rattling between the connecting frame 72 and the hitch body 71 is regulated.

  The upper link 4a and the hitch body 71 are in a state in which the rear end portion of the upper link 4a enters a link hole 76 provided in the hitch body 71, and the connecting shaft 77 is inserted through the uplink 4a and the hitch body 71 in the lateral direction of the airframe. It is connected. Both ends of the connecting shaft 77 protrude from the hitch body 71 on the lateral side of the link hole 76 to the lateral outer side, and a retaining pin 78 is attached to the end of the connecting shaft 77 protruding from the hitch body 71. On both lateral sides of the hitch body 71, recessed portions 71 b are provided for accommodating the end portions of the connecting shaft 77 and the retaining pins 78 so as not to protrude laterally outward from the hitch body 71. The reinforcing rib 79 connecting the upper thick part 71U located on the upper end side with respect to the recessed part 71b of the hitch body 71 and the lower thick part 71D located on the lower end side with respect to the recessed part 71b has a concave shape in side view. The hitch body 71 is integrally formed with an arc shape that bypasses the entry portion 71b. The reinforcing rib 79 reinforces the hitch body 71 by forming a portion that is thicker than the portion where the recessed portion 71 b is located at a portion of the hitch body 71 located on the side of the link hole 76.

[Another embodiment]
FIG. 14 is a side view showing the leveling body 80 having another embodiment structure. As shown in this figure, the leveling body 80 provided with another embodiment structure is disposed between the inner side ground contact float 11 and the outer side ground contact float 18 and supported by the main frame 14a.

  As shown in FIGS. 14 and 15, the leveling body 80 includes a vertical plate-shaped connecting portion 80 a that vertically faces the traveling aircraft, and a leveling action portion 80 b that extends downward from the lower end of the connecting portion 80 a toward the rear of the aircraft. It is configured.

  The connecting portion 80a is supported by a guide portion 81a of a bracket 81 fixed to the upper portion of the main frame 14a and a support hole 82a of a stay 82 fixed to the lower portion of the main frame 14a so as to be adjustable up and down, and a guide groove of the guide portion 81a. The positioning screw 84 configured to be slidably engaged with the 83 and fixed to the connecting portion 80a is tightened to be fixed to the bracket 81 by the positioning screw 84 at the elevation adjustment position. It is comprised so that. A stand support 86 is provided on the stay 82. The stand support part 86 is used to mount a detachable stand used when the paddy field working part 10 is placed on the ground.

  A leveling depth index 85 for displaying the leveling depth of the leveling body 80 with the positioning screw 84 as a guide is provided on the guide portion 81 a side by side in the vertical direction on the side of the guide groove 83. The form of the leveling depth index 85 and the form of the planting depth index 44 (see FIG. 7) provided on the lever guide 41 of the planting depth adjustment lever 40 are the same.

  That is, when the planting depth is changed, the positioning screw 84 is set at the adjustment position coincident with the leveling depth index 85 (for example, 85a) having the same form as the planting depth index 44 (for example, 44a) that coincides with the planting depth adjusting lever 40. By adjusting the leveling body 80 so as to be positioned, the leveling depth by the leveling body 80 naturally becomes the leveling depth corresponding to the changed planting depth. The height in the vertical direction with respect to the inner side ground contact float 11 and the outer side ground contact float 18 after changing the planting depth on the lower end side of the leveling action portion 80b of the leveling body 80 after the height adjustment is adjusted before the height adjustment. The height in the vertical direction with respect to the inner side ground contact float 11 and the outer side ground contact float 18 before changing the planting depth on the lower end side of the leveling action portion 80b of the leveling body 80 is the same as or substantially the same.

[Another Example]
(1) Although the example in which the plate-shaped leveling portions 26a and 60a are formed in a rake shape has been described in the above-described embodiment, the plate-shaped leveling portions 26a and 60a may be configured by a flat plate.

(2) In the above-described embodiment, the plate-shaped leveling portions 26a and 60a are provided with the vertical plate-shaped front side portions 26F and 60F, but the front side portions 26F and 60F are not provided and the mounting portions 26b and 60b are not provided. You may comprise so that the leveling part main body 26R, 60R may be extended from the extension end to the back lower direction of a body.

(3) In the above-described embodiment, the ground leveling bodies 26 and 60 connected to the float support shaft 36 are arranged between the grounding floats 11 and 12 or between the grounding floats 12 and 18. You may carry out by arrange | positioning in the lateral outer side of the side grounding float 18. FIG.

  INDUSTRIAL APPLICABILITY The present invention can be used not only for paddy field working machines that perform seedling planting work but also for paddy field working machines that perform seeding work for supplying seeds to paddy fields.

10 Paddy field working part 11, 12, 18 Grounding float 11F, 12F Front side part 11b, 12b Protruding part 11c, 12c Rear end 26, 60 Leveling body 26b, 60b Mounting part 26a, 60a Plate-shaped leveling part 26t, 60t Extension of mounting part Outlet 26e, 60e Rear end of plate-shaped leveling portion 36 Float support shaft 37 Support member

Claims (3)

A floating paddle is attached to the rear of the traveling machine body so that the paddy field working part can be moved up and down freely, and is attached to the paddy field working part so as to be rotatable around a lateral axis of the machine body and to be fixed at a rotation adjustment position. And a paddy field work machine provided with a grounding float supported on the extended end side of a support member that extends so as to rotate integrally from the float support shaft toward the rear of the machine body,
Place a leveling body on the lateral side of the grounding float,
A mounting portion that is connected to the float support shaft so as to freely rotate integrally with the leveling body extending from the float support shaft toward the front side of the machine body and an extension end positioned on the front side of the machine body from the float support shaft; A paddy field work machine comprising: a plate leveling part that extends downward from the extension end of the mounting part to the rear of the machine body for leveling.   2. The paddy field work according to claim 1, wherein a position of a rear end of a projecting portion of the front side portion of the grounding float projecting laterally of the body and a position of a rear end of the plate-like leveling portion are the same or substantially the same in the longitudinal direction of the body. Machine.   2. The rear end of the plate-shaped leveling portion is located at a position where the ground leveling body is provided between the adjacent grounding floats and the distance between the grounding floats is minimized in the lateral direction of the machine body. Paddy field machine.

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