JP2013000079A - Land-grading implement of paddy working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a land-grading implement of a paddy working machine allowing mounting of side land-grading wheel bodies in such a state that entwining of trashes hardly occurs.SOLUTION: There are provided side land-grading wheel bodies 90 integrally freely rotatably supported with ends 61a projecting from supporting members 81 in driving shafts 61 on the transverse outside of the machine body of the supporting members 81. The side land-grading wheel bodies 90 are composed by installing rotating plate parts 93 connected to the ends 61a of the driving shafts 61 and land-grading tine parts 94 provided in a plurality of sites in the circumferential direction of the rotating plate parts of the outer circumferential side parts of the rotating plate parts 93. The inward projecting length T2 projecting from the inward lateral faces 93b of the rotating plate parts 93 of the land-grading tine parts 94 is set longer than the outward projecting length T1 projecting from the outward lateral faces 93a of the rotating plate parts 93 of the land-grading tine parts 94 in the transverse outside direction of the machine body.

Description

  The present invention includes a drive shaft that is rotatably supported by a support member that is rotatably supported by a support member that is positioned at a lateral end of a work device, and a support shaft that is rotatably supported integrally with the drive shaft at a laterally inner side of the support member. The present invention relates to a leveling device for a paddy field work machine provided with a leveling rotor.

  Conventionally, for example, there has been a riding type rice transplanter disclosed in Patent Document 1. This riding type rice transplanter includes a drive shaft that passes through a transmission case located near the left end of the support frame and a support arm located near the right end of the support frame in the seedling planting device, and the transmission case of the drive shafts A scraping device provided with a rotating body having a rake-shaped leveling body in each of a part located between the support arm, a part projecting laterally outward from the transmission case, and a part projecting laterally outward from the support arm Is configured.

JP-A-2005-341881

  In the leveling device for a paddy field machine described above, when the drive shaft is provided with an end portion that protrudes laterally outside the body from the support member, and a side leveling wheel that is rotatably supported by this end portion is provided, for example, a leveling rotor Even if mud is pushed out to the lateral outer side, the side leveling wheel acts on the pushed mud and it can be advantageously leveled, such as being hard to remain in the state where the pushed mud is raised. . However, when straw scraps or the like are entangled with the side leveling wheel, the driving load tends to increase and the safety clutch tends to work, or the traveling load increases and the workability tends to decrease. In addition, the muddy water tends to be disturbed by entangled impurities.

  The objective of this invention is providing the leveling apparatus of the paddy field machine which can equip a side leveling ring body in the state which does not generate | occur | produce a tangle of a foreign material easily.

The first aspect of the present invention is a drive shaft that can be driven and rotated by a support member that is rotatably supported by a support member located at a lateral end of the working device, and can rotate integrally with the drive shaft on the inner side of the machine body from the support member. A leveling device for a paddy field machine equipped with a leveling rotor supported by
A side leveling wheel supported to be rotatable integrally with the drive shaft is provided at an end portion of the drive shaft that protrudes laterally outward from the support member.
The side leveling wheel body includes a rotating plate portion connected to an end portion of the drive shaft and a leveling claw portion provided at a plurality of locations in the circumferential direction of the rotating plate portion on the outer peripheral side portion of the rotating plate portion. And
The inward projecting length projecting inward from the side surface facing the machine body inner side of the rotating plate part of each of the leveling claws is set to be the outward projecting length projecting outward from the side surface facing the machine body outer side of the rotating plate part. It is set long.

  According to the configuration of the first aspect of the present invention, the side leveling wheel has a leveling claw portion protruding from the rotating plate portion to the inner side and the outer side of the body, the inward protruding length of the leveling claw portion is long, The direction protrusion length is short. On the inner side of the aircraft from the side leveling wheel, the leveling action of the leveling rotor makes it easier for foreign matter to sink or flow backward, and even if the inward protruding length of the leveling claw is long, the leveling claw Intrusion of impurities is difficult to occur. Even if the ground leveling rotor does not level the ground and the dirt leveling surface is shallower than the side leveling wheel, the leveling claw part protrudes outward. Due to its short length, it is easy to come off even if foreign matter enters the leveling claw part, and further, it can be prevented by the rotating plate part from entering the side leveling wheel from the lateral side of the aircraft, and the whole leveling claw part Even if the length in the lateral direction of the aircraft is increased, it is easy to avoid tangling of impurities.

  Therefore, a leveling device that is equipped with a side leveling wheel with a leveling claw that is long in the lateral direction of the aircraft and can level the ground as much as possible, increases the driving load due to the entanglement of impurities in the side leveling wheel and muddy water. It can be made difficult to disturb.

The second aspect of the present invention is a drive shaft that can be rotated by a support member that is rotatably supported by a support member that is positioned at the lateral end of the work device, and a drive shaft that is laterally movable from the support member and that is integrally rotatable with the drive shaft on the lateral side of the machine body. A leveling device for a paddy field machine equipped with a leveling rotor supported by
A side leveling wheel supported to be rotatable integrally with the drive shaft is provided at an end portion of the drive shaft that protrudes laterally outward from the support member.
The side leveling wheel body includes a rotating plate portion connected to an end portion of the drive shaft and a leveling claw portion provided at a plurality of locations in the circumferential direction of the rotating plate portion on the outer peripheral side portion of the rotating plate portion. And
Each of the leveling pawl portions is formed so as not to protrude outward from the side surface of the rotating plate portion facing outward from the machine body, and to protrude inward from the side surface of the rotating plate portion facing toward the inner side of the body.

  According to the configuration of the second aspect of the present invention, the side leveling wheel has a leveling claw that protrudes from the rotating plate portion to the inner side of the body and does not protrude to the outer side of the body. On the inner side of the fuselage from the side leveling wheel, it is easy for sediment to settle or flow backward due to the leveling action of the leveling rotor. Therefore, even if the leveling claw portion protrudes from the rotary plate portion to the inner side of the machine body, it is difficult for impurities to enter the leveling claw portion. There is no leveling action by the leveling rotor on the laterally outer side of the side of the ground leveling wheel, and impurities are more likely to be generated on the surface of the mud layer and shallower parts than on the laterally inner side of the body. However, since the leveling claw portion does not protrude from the rotary plate portion to the lateral side of the machine body, the entanglement of impurities on the leveling claw portion does not occur. In addition, it is possible to prevent foreign matter from entering the side of the leveling wheel from the lateral side of the aircraft by the rotating plate part, and even if the length of the leveling claw part in the horizontal direction of the aircraft is increased, the entanglement of the foreign matter is prevented. Easy to avoid.

  Therefore, a leveling device that is equipped with a side leveling wheel with a leveling claw that is long in the lateral direction of the aircraft and can level the ground as much as possible, increases the driving load due to the entanglement of impurities in the side leveling wheel and muddy water. It can be made difficult to disturb.

  According to the third aspect of the present invention, a boss portion that connects the side leveling wheel to the end of the drive shaft is biased toward the support member with respect to a center position in the rotation axis direction of the side leveling wheel. is there.

  According to the configuration of the third aspect of the invention, in order to connect the side leveling wheel to the end portion of the drive shaft, the boss portion can be connected to the support member as much as possible, and the drive shaft protruding from the support member to the outer side of the machine body can be connected. The protruding length of the end can be suppressed as short as possible.

  Therefore, when the side leveling wheel is removed, even if the drive shaft is left attached, the drive shaft does not protrude from the support member to the lateral side of the aircraft for a long time, making it easier to bring the vehicle to the heel and reducing the space for transportation. It becomes easy to accommodate.

  In the fourth aspect of the present invention, there is provided an annular support portion that extends from the outer peripheral edge portion of the rotating plate portion toward the inner side of the machine body and is formed in an annular shape over the entire circumference of the rotating plate portion to support the leveling pawl portions. I have it.

  According to the structure of this 4th invention, a leveling nail | claw part can be connected to a rotation board part via an annular support part over the wide range in a body horizontal direction, and the connection of the leveling claw part with respect to a rotation board part can be strengthened.

  Therefore, even in the case of hard mud, the leveling pawl portion can be strongly rotated against a strong leveling reaction force to perform leveling with good finish.

  The fifth aspect of the present invention includes a plate-like body disposed on the extending end side of the annular support portion so as to close the airframe laterally inner side opening of the side leveling wheel formed by the annular support portion.

  According to the configuration of the fifth aspect of the present invention, muddy water and the like can be prevented from entering the inside of the side leveling wheel from the lateral side of the machine body by the plate-like body.

  Therefore, it is easy to avoid the occurrence of troubles such as accumulation of mud in the side leveling wheel and an increase in driving load.

  According to the sixth aspect of the present invention, a recessed portion into which an end of a connecting bolt that connects the plate-like body and the rotating plate portion enters is provided on the outward side surface of the rotating plate portion.

  According to the configuration of the sixth aspect of the invention, the end of the connecting bolt is prevented from protruding from the rotating plate portion to the outer side of the fuselage, or the amount of protrusion is suppressed to a small level, so that the end of the connecting bolt is mud and dirt. It can make things difficult to attach.

  Therefore, it is easy to avoid the occurrence of mud water disturbance or the mud or foreign matter adhering or entangled to the end of the bolt.

It is a side view which shows the whole paddy field machine. It is a side view which shows a seedling planting apparatus and a leveling apparatus. It is a front view which shows a seedling planting apparatus and a leveling apparatus. It is a top view which shows a seedling planting apparatus and a leveling apparatus. It is a perspective view in the decomposition state of a side leveling rotor part. It is a side view which shows a unit rotor body. It is a cross-sectional top view which shows the arrangement | positioning part of the left side leveling wheel. It is a cross-sectional top view which shows the arrangement | positioning part of the right side leveling ring body. It is a side view which shows a side leveling wheel. It is a perspective view in the decomposition state of a side leveling wheel. It is XI-XI cross-sectional arrow view of FIG. It is a side view which shows a raising / lowering operation apparatus. It is a perspective view which shows the side leveling ring body provided with another implementation structure. It is a cross-sectional top view which shows the side leveling ring body provided with another implementation structure. It is a cross-sectional top view which shows the side leveling ring body provided with another implementation structure.

Hereinafter, an embodiment of a paddy field working machine according to the present invention will be described based on the drawings.
As shown in FIG. 1, a paddy field work machine has a six-row planting type seedling planting device by a link mechanism 3 at the rear of a traveling machine body A supported by right and left front wheels 1 and right and left rear wheels 2. 5 (corresponding to the working device) is supported so as to be movable up and down, and is provided with a hydraulic lifting cylinder 4 that drives the link mechanism 3 to move up and down. As will be described later, the seedling planting device 5 is configured to be movable up and down by a lifting cylinder 4 over a working position where it contacts the field surface G and a non-working position (upper limit position of the link mechanism 3) that is far away from the field surface G. ing.

Next, the seedling planting device 5 will be described.
As shown in FIGS. 1, 2, and 4, the seedling planting device 5 includes one feed case 17, three transmission cases 6, and a pair of rotation cases 7 that are rotatably supported at the rear part of the transmission case 6. , A pair of planting arms 8 provided at both ends of the rotating case 7, a grounding float 9 (hereinafter referred to as a center float 9) located at the center of the left and right, and a grounding float 11 (hereinafter referred to as a side float 11) located at the left and right sides. A seedling placing base 10 that is provided with six seedling placing surfaces and is driven to reciprocate laterally in the left-right direction, and a vertical feeding mechanism 25 provided on each seedling placing surface of the seedling placing stand 10. Yes. A feed case 17 and a transmission case 6 are fixed to a rectangular tubular main frame 18 extending in the left-right direction. The feed case 17 swings left and right around the front and rear axis P1 (see FIG. 3) at the lower rear portion of the link mechanism 3. It is supported freely.

  As shown in FIG. 4, the transverse feed shaft 19 extends from the feed case 17, and the end of the transverse feed shaft 19 is supported by the main frame 18 via the support member 20, and as the transverse feed shaft 19 rotates. A feed member 21 that is driven to reciprocate laterally is fitted on the transverse feed shaft 19, and the feed member 21 is connected to the seedling table 10. A guide rail 38 is supported by the transmission case 6 in the left-right direction, and a lower portion of the seedling bed 10 is supported along the guide rail 38 so as to be laterally movable. As shown in FIGS. 2 and 3, the vertical support member 26 is fixed to the right and left ends of the main frame 18 and extends upward, and the horizontal support member 50 is fixed over the upper portion of the vertical support member 26. The guide rail 27 is fixed to the front surface of the upper portion of the seedling platform 10, and the guide rail 27 is supported by a roller 51 supported by the lateral support member 50 so as to be movable laterally.

  As shown in FIGS. 1 and 4, the power of the engine 49 is transmitted to the input shaft 28 provided in the feed case 17 through the planting clutch (not shown) and the PTO shaft 22, and the power of the input shaft 28 is transmitted. Is transmitted to the lateral feed shaft 19 via the lateral feed speed change mechanism 29, and the lateral feed shaft 19 is rotationally driven. The power of the input shaft 28 is transmitted to the transmission chain 30, the transmission shaft 23 installed over the transmission case 6, and the input shaft 32 provided in the transmission case 6, and the power of the input shaft 32 is transmitted to the torque limiter 33 and the transmission chain 34. Then, it is transmitted to the rotating case 7 through the small number of clutches 24 and the drive shaft 35. A cylindrical cover 60 is fixed over the transmission case 6, and the transmission shaft 23 is covered by the cover 60.

  As a result, when the planting clutch is operated in the transmission state, the seedling table 10 is reciprocated horizontally to the left and right, and the revolving case 7 is rotated counterclockwise in FIG. The planting arm 8 alternately takes out seedlings from the lower part of the seedling platform 10 and plantes them on the rice field G. When the planting clutch is operated in the disconnected state, the reciprocating lateral feed driving of the seedling platform 10 and the rotational driving of the rotating case 7 are stopped.

  As shown in FIG. 2, a belt-type vertical feed mechanism 25 is provided on each of the six seedling setting surfaces of the seedling setting table 10. As shown in FIG. 4, the longitudinal feed shaft 36 extends from the feed case 17, and the end of the longitudinal feed shaft 36 is supported by the main frame 18 via the support member 37, and the longitudinal feed is performed by the power of the input shaft 28. The shaft 36 is rotationally driven, and a pair of drive arms 36 a are fixed to the longitudinal feed shaft 36. An input unit (not shown) for transmitting power to the six vertical feed mechanisms 25 is provided in the seedling bed 10, and the input unit is located between the drive arms 36 a of the vertical feed shaft 36. As a result, when the seedling bed 10 reaches the right or left end of the reciprocating lateral feed drive, the input portion reaches one drive arm 36a of the vertical feed shaft 36 and is input by one drive arm 36a of the vertical feed shaft 36. The parts are driven, and the seedlings on the seedling table 10 are sent downward by the six vertical feeding mechanisms 25.

  As shown in FIGS. 1 and 2, on the rear side of the driver's seat 31, there are provided a hopper 12 for storing fertilizer and three feeding portions 13 each corresponding to two planting strips. A blower 14 is provided on the lower side. Two groovers 15 are fixed to the center float 9 and the side float 11, and six groovers 15 are provided. Six hoses 16 extend between the feeding portion 13 and the groover 15. Is connected. As a result, the fertilizer is fed from the hopper 12 by a predetermined amount by the feeding section 13 along with the seedling planting as described above, and the fertilizer is supplied to the groove producing device 15 through the hose 16 by the blower 14 blowing. Yes, fertilizer is supplied to the rice field G via the grooving device 15.

As shown in FIGS. 1 and 2, the seedling planting device 5 is provided with a leveling device 53 arranged in front of the center float 9 and the side float 11.
As shown in FIGS. 3 and 4, the leveling device 53 is a lateral cross-sectional shape of the machine body that is rotatably supported by a pair of left and right support members 81, 81 that are positioned separately at the left and right lateral ends of the seedling planting device 5. Is a square drive shaft 61 and a drive shaft at a position located on the inner side of the fuselage with respect to the left support member 81 and on the inner side of the fuselage with respect to the right support member 81, that is, between the pair of left and right support members 81, 81. 61, a leveling rotor 62 supported to be integrally rotatable, a left side leveling wheel 90 supported so as to be able to be driven at a position located laterally outside the body from the left support member 81, and an airframe from the right support member 81. A right side leveling wheel 90 that is supported so as to be able to be driven at a position located laterally outside is provided.

  FIG. 7 is a cross-sectional plan view showing an arrangement portion of the left side leveling wheel 90. FIG. 8 is a cross-sectional plan view showing an arrangement portion of the right side side leveling wheel 90. As shown in these drawings, the left and right side ground leveling wheels 90 are supported so as to be integrally rotatable with the drive shaft 61 at an end portion 61a protruding from the support member 81 of the drive shaft 61 to the lateral side of the body. Yes.

  The left support member 81 is constituted by a transmission case attached over the drive shaft 61 and the end of the transmission shaft 75 that is rotatably supported by a boss member 64 fixed to the left end of the main frame 18. The left support member 81 is composed of the shaft core of the transmission shaft 75 and swings up and down around the horizontal shaft core P <b> 2 located on the rear end side of the support member 81. The right support member 81 extends from the bracket 82 fixed to the right end of the main frame 18 so as to be swingable up and down around the horizontal axis P2 toward the front of the machine body.

The drive structure of the leveling device 53 will be described.
As shown in FIG. 4, a transmission shaft 75 connected to the input shaft 32 provided in the transmission case 6 is disposed inside the boss member 64 and the support member 81. Inside the support member 81, a sprocket 78 is fitted on the transmission shaft 75 so as to be relatively rotatable, a sprocket 79 is fixed to the drive shaft 61, and a transmission chain 80 is wound around the sprockets 78, 79. A safety clutch 77 is provided between the transmission shaft 75 and the sprocket 78.

  As shown in FIGS. 1 and 4, the power of the engine 49 is transmitted to the input shaft 28, the transmission chain 30, the transmission shaft 23, and the input shaft 32 via the planting clutch (not shown) and the PTO shaft 22. The power of the input shaft 32 is transmitted to the drive shaft 61 through the transmission shaft 75, the safety clutch 77, and the transmission chain 80. The drive shaft 61 moves the leveling roller 62 and the left and right side leveling wheels 90, 90 on the paper surface of FIG. Drives counterclockwise.

  The drive shaft 61 is rotationally driven at a speed higher than the traveling speed of the machine body, and the leveling rotor 62 and the left and right side leveling wheels 90, 90 rotate in a state where their peripheral speed is higher than the peripheral speed of the rear wheel 2. Driven. Thereby, the field G in front of the planting arm 8 is leveled (scratched). Mud scattering from the leveling rotor 62 to the rear seedling planting device 5 is prevented by the mudguard cover 66.

  The leveling rotor 62 includes a pair of left and right large-diameter side leveling rotor portions 62A and 62A that are disposed on the front side of the left and right side floats 11 so as to be integrally rotatable with the drive shaft 61, and the front side of the center float 9 on the front side. And a pair of left and right small-diameter center leveling rotor portions 62B and 62B that are disposed on the drive shaft 61 so as to be rotatable integrally with the drive shaft 61. Spacers 63 disposed between the pair of left and right center leveling rotor parts 62B and 62B, between the pair of left and right side leveling rotor parts 62A and 62A, and between the center leveling rotor part 62A and the right side side leveling rotor part 62A, respectively. The drive shaft 61 is externally fitted. A boss portion 57 of an elevating link 58 disposed between the center leveling rotor portion 62B and the left side side leveling rotor portion 62A is externally fitted to the drive shaft 61. The boss portion 57 has a spacer function.

  FIG. 5 is a perspective view of the side leveling rotor 62A in an exploded state. FIG. 6 is a side view showing a large-diameter unit rotor body 71 constituting the side leveling rotor portion 62A. As shown in these drawings and FIG. 3, each side leveling rotor portion 62 </ b> A is configured by a plurality of large-diameter unit rotor bodies 70 and 71 connected side by side in the axial direction of the drive shaft 61. The unit rotor body 70 of the unit rotor bodies 70 and 71 extends from a plurality of locations on the mounting plate portion 70b having a square mounting hole 70a that fits around the drive shaft 61, and on the outer peripheral side of the mounting plate portion 70b. And a leveling bar portion 70c to be taken out. The unit rotor body 70 includes a mounting plate portion 70b and a leveling bar portion 70c that are integrally formed of a synthetic resin material. The unit rotor body 71 of the unit rotor bodies 70 and 71 is disposed at one end of the side leveling rotor portion 62A, and is a synthetic resin having a square mounting hole 71a that fits around the drive shaft 61. It is comprised with the plate-shaped body made from a material. Each leveling bar portion 70c of the unit rotor body 70 is fitted into the connecting portions 70d and 71b provided in the adjacent unit rotor body 70 or the unit rotor body 71 so that the extended end portions thereof are adjacent to each other. The structure is connected to the body 70 or the unit rotor body 71.

  Each center leveling rotor 62B is composed of a plurality of small-diameter unit rotor bodies 72 and 73 that are connected side by side in the axial direction of the drive shaft 61. The unit rotor bodies 72 and 73 constituting the center leveling rotor portion 62B are different from the unit rotor bodies 70 and 71 constituting the side leveling rotor portion 62A in terms of the outer diameter. It has the same configuration as the unit rotor bodies 70 and 71 constituting the leveling rotor 62A.

  As shown in FIGS. 7 to 11, the left and right side leveling wheels 90 are each a plate-like body 92 having a boss portion 91 connected to the end 61 a of the drive shaft 61 by a connecting bolt 100 at the center, A rotating plate connected to the plate-like body 92 by three connecting bolts 101 so as to be integrally rotatable with the plate-like body 92 arranged on the lateral outer side of the body (the side opposite to the side where the support member 81 is located). And a plurality of leveling claws 94 provided in a distributed manner in the circumferential direction of the rotating plate portion 93 on the outer peripheral side portion of the rotating plate portion 93. The side leveling wheel body 90 can be attached / detached only by attaching / detaching one connecting bolt 100.

  The rotating plate portion 93 is located on the laterally outer side of the machined body 90 of the side leveling wheel 90, and makes it difficult for the waves to go to the adjacent land where the seedling has been planted. The rotary plate portion 93 includes an annular support portion 95 that extends from the outer peripheral edge portion of the rotary plate portion 93 toward the inner side of the machine body and is formed in an annular shape over the entire periphery of the rotary plate portion 93. The plurality of leveling claws 94 are firmly supported against the leveling reaction force. The rotating plate portion 93, the plurality of leveling pawls 94, and the annular support portion 95 are integrally formed of a synthetic resin material.

  Each leveling claw 94 protrudes outward from the lateral side surface 93a of the rotating plate part 93 with the outward protruding length T1, and protrudes inward from the lateral side surface 93b of the rotating plate part 93 toward the inner side. The machine body is configured to have a lateral length protruding at T2. The inward protruding length T2 of each leveling claw 94 is set longer than the outward protruding length T1 of each leveling claw 94. Each leveling claw 94 has an end on the inner side of the side leveling ring body located inside the outer peripheral edge of the rotary plate portion 93 and the annular support portion 95 in the entire range of the leveling claw 94 in the lateral direction of the machine body. An end on the outer side of the body is configured to have a size in the direction of the side of the side leveling wheel located outside the outer peripheral edges of the rotary plate portion 93 and the annular support portion 95. Each leveling claw 94 includes a crushing protrusion 94a provided at a central portion in the lateral direction of the machine body of a portion protruding outward from the outer peripheral edges of the rotary plate portion 93 and the annular support portion 95, and the crushing protrusion 94a. To level the ground while breaking the mud mass.

  The rotating plate portion 93 includes connecting portions 96 that are provided by forming inwardly bulging portions that bulge inward in the lateral direction of the fuselage at three locations in the circumferential direction, and are provided on each connecting portion 96 and the plate-like body 92. The bolts 92a are connected to the plate-like body 92 by connecting bolts 101 attached to the bolt holes 92a. Each connecting bolt 101 has an end portion 101 a of the connecting bolt 101 and a nut 102 formed in a recessed portion 97 formed by forming an inwardly bulging portion constituting the connecting portion 96 on the side surface 93 a facing the machine body laterally outward of the rotating plate portion 93. Is attached in a state where the end portion 101a of the connecting bolt 101 and the nut 102 are not easily attached to scraps and mud. The head of the connecting bolt 100 that connects the plate-like body 93 to the end portion 61 a of the drive shaft 61 enters the recessed portion 98 formed in the machine body lateral outer surface 93 a of the rotating plate portion 93. It is difficult to attach straw scraps or mud to the head.

  The plate-like body 92 is made of a sheet metal material. The plate-like body 92 forms a boss portion 91 having a square mounting hole 91a by a portion located at the center of the plate-like body 92 and a sheet metal material attached to the side face facing the machine body laterally inside this portion. The boss 91 is formed so as to be biased toward the side where the support member 81 is located with respect to the center position C in the direction of the rotation axis of the side leveling wheel 90. The boss portion 91 abuts on the end surface of the end portion 61 a of the drive shaft 61 and is tightened and connected by the connecting bolt 100, thereby connecting the side leveling wheel 90 to the end portion 61 a of the drive shaft 61 so as to be integrally rotatable. The plate-like bodies 92 are connected so as to be positioned on the extending end side of the annular support portion 95, and face the inner side of the body of the cavity 99 formed inside the side leveling wheel 90 by the annular support portion 95. The opening 99a is closed to make it difficult for mud to enter the cavity 99. Even if mud enters the inside of the side leveling ring 90, the plate-like body 92 can be removed and removed easily.

  The plate-like body 92 includes a notch recess 92 b formed so that the leveling claw portion 94 enters the outer peripheral edge portion, and the outer peripheral portion of the plate-like body 92 extends from the annular support portion 95 as shown in FIGS. 9 and 11. The opening 99a of the cavity 99 is closed without protruding to the outer peripheral side.

FIG. 12 is a side view showing an elevating operation device that elevates and lowers the leveling device 53.
The lifting / lowering operation device is an electric motor 56 supported by a support frame 52 fixed to the main frame 18 via a stay 52a, and a fan-shaped lifting / lowering supported by the support frame 52 so as to swing up and down around a horizontal axis P3. A gear 54, a lift link 58 attached to the lift gear 54 and the drive shaft 61 are provided.

  In the lifting operation device, the electric motor 56 drives the pinion gear 55a of the reduction gear mechanism 55 and swings the lifting gear 54 with this pinion gear 55a, thereby lifting and lowering the lifting link 58 to support the drive shaft 61 on the left and right. The member 81 is moved up and down around the pivot axis P <b> 2, whereby the leveling rotor 62 and the left and right side leveling wheels 90 are moved up and down relative to the surface G and the main frame 18. Reference numeral 74 shown in FIG. 12 denotes a rotary potentiometer that detects the leveling height of the leveling rotor 62 and the side leveling wheel 90 based on the swing angle of the elevating gear 54.

[Another Example]
FIG. 13 is a perspective view showing a side leveling wheel 90 having another embodiment structure. 14 and 15 are cross-sectional plan views showing a side leveling wheel 90 having another embodiment structure. As shown in these drawings, in the side leveling wheel 90 having another implementation structure, the leveling pawl 94 does not protrude outward from the side surface 93a facing the machine body laterally outward of the rotating plate portion 93, and the rotating plate portion 93 The vehicle body has a lateral length that protrudes inward from the side surface 93b facing the vehicle body inner side. The side leveling ring body 90 having another implementation structure has the same configuration as the side leveling ring body 90 described in the above-described embodiment except for this point.

[Another embodiment]
(1) In the above-described embodiment, an example in which the leveling rotor 62 positioned on the lateral inner side of the body from the support member 81 is configured to include the center leveling rotor portion 62B having a small outer diameter and the side leveling rotor portion 62A having a large outer diameter. However, you may comprise including the center leveling rotor part 62B and the side leveling rotor part 62A with the same outer diameter. Further, as the leveling rotor 62 positioned on the inner side of the machine body from the support member 81, a series of leveling rotors may be adopted in the machine body lateral direction.

(2) In the above-described embodiment, an example in which the single drive shaft 61 is supported by the pair of left and right support members 81 and 81 that are distributed and positioned at both lateral ends of the work device 5 has been described. A left side leveling rotor comprising a support member 81 located at the left lateral end of the work device 5 and a left drive shaft supported by a support member located inside the machine body from the support member 81, and the work device 5. A right leveling rotor including a right side drive shaft supported by a support member 81 positioned at the right end of the main body and a right side drive shaft supported by a support member positioned on the inner side of the machine body from the support member 81, and the leveling for the left side A side leveling wheel 90 is provided laterally outside the laterally outer support member 81 that supports the rotor and the right leveling rotor, and laterally outer than the laterally inner support member that supports the left leveling rotor and the right leveling rotor. No side leveling wheel It can also be applied in the.

  INDUSTRIAL APPLICATION This invention can be utilized for the paddy field machine provided with the working device which performs a seeding operation | work other than the paddy field machine provided with the seedling planting apparatus.

DESCRIPTION OF SYMBOLS 5 Work apparatus 61 Drive shaft 61a End part of a drive shaft 62 Leveling rotor 81 Support member 90 Side leveling ring body 91 Boss part 92 Plate body 93 Rotating plate part 93a Side surface facing body laterally outward 93b Side surface facing body laterally side 94 Leveling Claw part 95 Annular support part 97 Recessed part 99a Opening 100 Connecting bolt 100a End part of connecting bolt C Center position T1 Outward projecting length T2 Inward projecting length

Claims (6)

A drive shaft that is rotatably driven by a support member that is rotatably supported by a support member that is positioned at a lateral end of the working device, and a leveling rotor that is rotatably supported by the drive shaft on the inner side of the vehicle body from the support member. A leveling device for a paddy field machine equipped with
A side leveling wheel supported to be rotatable integrally with the drive shaft is provided at an end portion of the drive shaft that protrudes laterally outward from the support member.
The side leveling wheel body includes a rotating plate portion connected to an end portion of the drive shaft and a leveling claw portion provided at a plurality of locations in the circumferential direction of the rotating plate portion on the outer peripheral side portion of the rotating plate portion. And
The inward projecting length projecting inward from the side surface facing the machine body inner side of the rotating plate part of each of the leveling claws is set to be the outward projecting length projecting outward from the side surface facing the machine body outer side of the rotating plate part. A long-setting paddy field machine leveling machine. A drive shaft that is rotatably driven by a support member that is rotatably supported by a support member that is positioned at a lateral end of the working device, and a leveling rotor that is rotatably supported by the drive shaft on the inner side of the vehicle body from the support member. A leveling device for a paddy field machine equipped with
A side leveling wheel supported to be rotatable integrally with the drive shaft is provided at an end portion of the drive shaft that protrudes laterally outward from the support member.
The side leveling wheel body includes a rotating plate portion connected to an end portion of the drive shaft and a leveling claw portion provided at a plurality of locations in the circumferential direction of the rotating plate portion on the outer peripheral side portion of the rotating plate portion. And
Each of the leveling pawl portions is formed so as not to protrude outward from the laterally outward side surface of the rotating plate portion, and to protrude inward from the laterally facing side surface of the rotating plate portion. Leveling device.   The boss portion that connects the side leveling wheel to the end of the drive shaft is biased toward the support member with respect to the center position of the side leveling wheel in the rotational axis direction. The leveling device for the paddy field machine described.   2. An annular support portion that extends from the outer peripheral edge portion of the rotating plate portion toward the inner side of the body and is formed in an annular shape over the entire circumference of the rotating plate portion to support the leveling pawl portions. The leveling apparatus of the paddy field machine as described in any one of -3.   The paddy field work of Claim 4 provided with the plate-shaped body arrange | positioned at the extension end side of the said annular support part so that the body horizontal direction direction opening of the said side leveling wheel formed by the said annular support part may be closed. Machine leveling equipment.   The leveling device for a paddy field machine according to claim 5, wherein a recessed portion into which an end portion of a connecting bolt that connects the plate-like body and the rotating plate portion enters is provided on an outward side surface of the rotating plate portion.

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