JP2008228598A - Rice plant transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice transplanter equipped with a ground-leveling device for reducing flexure. <P>SOLUTION: This rice transplanter, in which a ground-leveling device is disposed is characterized by disposing a reinforcing stay 22 between the approximately lateral center portion of a rotation support shaft 39 and a planting frame 26 for supporting a planting portion 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rice transplanter including a leveling device.

  Conventionally, there are rice transplanters in which a planting part is connected to a rear part of a traveling part so as to be movable up and down, and a leveling device is attached to the planting part.

This leveling device is attached to the planting part by being supported by two support arms, and is linked to a prime mover part provided in the traveling part via a transmission mechanism part. This transmission mechanism unit is linked to a transmission shaft that transmits power from a prime mover unit to a rear axle case provided in the traveling unit via a reduction gear, and this output shaft is linked to a leveling device ( For example, see Patent Document 1).
JP-A-8-130939

  However, when the leveling device comes into contact with stones or piles in a farm scene when planting work and leveling work are performed by the rice transplanter, deflection occurs in the leveling device. As a result, problems occur such as the ground leveling device interfering with other members and causing a load on the leveling device drive system.

  This invention provides the rice transplanter provided with the leveling device which reduces a deflection | deviation in view of the above-mentioned point.

  The invention according to claim 1 is connected to a leveling device that is connected to the rear of the traveling unit so as to be movable up and down, and is leveled by rotational movement in front of the planting unit and in the lateral width direction of the planting unit. In the rice transplanter comprising a rotating support shaft extending in the left-right width direction of the planting part and a rotating body for leveling adjacent to the rotating support shaft, the center of the rotating support shaft in the left-right width direction. A reinforcement stay is interposed between the portion and a planting frame that supports the planting portion.

  According to a second aspect of the present invention, the reinforcing stay is interposed between a transmission case that transmits power from the prime mover portion to the rotary support shaft and a planting frame that supports the planting portion.

  According to a third aspect of the present invention, the reinforcing stay has a telescopic structure that can be adjusted in the length direction.

  According to the first aspect of the present invention, even when an external force is applied to the leveling device from the front-rear direction of the machine body due to a stone or a foreign object colliding with the leveling device during work traveling, the deflection of the leveling device or the drive shaft is affected. Therefore, it is possible to prevent interference with a float or the like that is a peripheral member of the leveling device. Further, the bearing and the bending stress of the shaft in the drive system of the leveling device can be reduced, and the effect of preventing deformation and breakage can be obtained.

  According to the second aspect of the present invention, the reinforcement stay is interposed between the transmission case that transmits the power from the prime mover portion to the rotary support shaft and the planting frame that supports the planting portion. Even if an external force is applied to the leveling device from the front-rear direction of the machine body due to a stone or foreign object colliding with the leveling device, it is possible to reduce the deflection of the leveling device and the drive shaft. Thus, interference with a float or the like can be prevented. Further, the bearing and the bending stress of the shaft in the drive system of the leveling device can be reduced, and the effect of preventing deformation and breakage can be obtained. Furthermore, as the number of planting strips in the planting section increases, the overall length in the left-right width direction of the leveling device increases, and warpage (elastic deformation) may occur in the support horizontal frame that supports the leveling device in the left-right width direction. Adjustments and corrections can be made with the reinforcing stay, and it is possible to prevent misalignment of the drive shaft of the leveling device during factory assembly.

  According to invention of Claim 3, although the width | variety of a seedling mounting stand becomes long with the difference in the number of the seedling mounting stand of a planting part, the space | interval of the advancing direction of a planting part and a leveling device also changes. By adopting an expansion structure for the reinforcement stay, it is possible to change the length of one reinforcement stay by changing the length even if the number of strips is different. can do.

Hereinafter, embodiments of a rice transplanter according to the present invention will be described in detail with reference to the drawings.
A shown in FIG. 1 is a rice transplanter according to the present invention. This rice transplanter A is connected to a planting unit 2 by connecting a planting unit 2 to the rear of the traveling unit 1 through a lifting mechanism 3 so as to be movable up and down. Leveling device 4 is installed.

  As shown in FIG. 1, the traveling unit 1 includes a motor unit 11 disposed in the front part of the body frame 10, a driving unit 12 disposed behind the motor unit 11, and a lower front part of the body frame 10. A pair of left and right front wheels 13 and 13 are attached to the vehicle body 10 via a front axle case (not shown), while a pair of left and right rear wheels 15 and 15 are attached to the rear part of the body frame 10 via a rear axle case 14. Reference numeral 16 denotes a handle provided in the driving unit 12, and reference numeral 17 denotes a driver's seat provided in the driving unit 12.

  The machine body frame 10 is provided with a transmission unit 20 positioned below the motor unit 11 and above the front axle case. The transmission unit 20 is connected to the motor unit 11 by a transmission belt (not shown). And the rear axle case 14 are linked to the transmission unit 20 via the transmission shaft 21.

  In this way, power is transmitted from the motor unit 11 to the transmission belt → the transmission unit 20 → the front axle case and the transmission unit 20 → the transmission shaft 21 → the rear axle case 14, and the front and rear wheels 13, 13, 15, 15 Four-wheel drive is possible.

  As shown in FIGS. 1 and 2, the planting unit 2 includes a planting frame 26 including a planting transmission case 25 and vertical and horizontal frame members, which will be described later, and a seedling stand 27 planted on the planting frame 26. Attached so as to be able to reciprocate to the left and right above the attached transmission case 25, the seedlings are cut from the seedling mat placed on the seedling placing stand 27 by the planting claws 28 provided at the rear of the planting transmission case 25 and put on the field. I try to plant it. A plurality of floats 29 are provided below the planting unit 2.

  As shown in FIGS. 2 and 3, the elevating mechanism 3 is interposed between the rising frame forming body 30 provided at the rear part of the body frame 10 of the traveling unit 1 and the planting frame 26 of the planting unit 2. A top link 31, a lower link 32, and an elevating cylinder 33 (see FIG. 3) for raising and lowering the lower link 32. 31a is a front end support shaft of the top link, 32a is a front end support shaft of the lower link, and 33a and 33b are cylinder connecting pins.

  In this way, the planting part 2 can be lifted and lowered by the lifting cylinder 33 via the lower link 32 and the top link 31.

  As shown in FIGS. 2 and 4, the leveling device 4 includes a leveling body 35 disposed immediately before the planting portion 2, a transmission mechanism portion 36 attached to the front wall of the rear axle case 14 of the traveling portion 1, and the like. A ground leveling transmission shaft 37 interposed between the transmission mechanism 36 and the leveling body 35 is provided.

  The transmission mechanism portion 36 is attached to the right side portion of the front wall of the rear axle case 14 (see FIG. 4), and the power from the prime mover portion 11 is input from the transmission shaft 21 to the case body 99 constituting the transmission mechanism portion 36. The power can be transmitted to the leveling output shaft 88 projecting from the case body 99 with the axis line directed toward the rear of the machine body. In FIG. 4, reference numeral 105 denotes a clutch mechanism for operating / stopping the leveling main body 35 described later.

  As shown in FIG. 2, the leveling transmission shaft 37 includes a universal joint 91 that connects a rear end portion of a front half forming shaft 89 extending in the front-rear direction and a front end portion of the rear half forming shaft 90 extending in the front-rear direction. The front half forming shaft 89 is connected to the projecting end portion of the leveling output shaft 88 in an interlocking manner, and is arranged in a substantially horizontal state from the case body 99 toward the rear of the machine body. The rear half forming shaft 90 is linked and connected via a universal joint 85 to a transmission input shaft 81 disposed in a transmission case 41 of a leveling main body 35 described later disposed below.

  As shown in FIG. 5, the leveling main body 35 is a left / right rotation horizontally mounted between a lifting support machine frame 38 attached to the planting frame 26 of the planting part 2 and a lower end part of the lifting support machine frame 38. The support shafts 39, 39, a plurality of leveling rotary bodies 40 coaxially attached to the outer periphery of each of the rotary support shafts 39, 39, and the leveling rotary bodies 40, 40 are disposed at a substantially central position. The power transmission unit 41 includes a transmission case 41 that transmits the power transmitted from the prime mover unit 11 provided in the traveling unit 1 to the leveling transmission shaft 37 to the rotary support shafts 39 and 39. Further, the leveling rotary bodies 40 and 40 and the rotation support shafts 39 and 39 are configured to be grounded and separated from the farm scene by moving the lifting support frame 38 up and down. In the leveling unit, a plurality of leveling rotary bodies 40 are concentrically mounted on the rotation support shaft 39. A cylindrical shaft cover is provided on a part of the rotation support shafts at both ends of the transmission case.

  The elevating support machine frame 38 includes a rotation support shaft 43. The rotation support shaft 43 extends in the left-right direction, and a pair of left and right lifting arms 44, 44 extending downward are provided at both left and right ends of the rotation support shaft 43. And the upper ends of links 45, 45 extending in the vertical direction are connected to the tips of the lifting arms 44, 44, and a pair of left and right leveling bodies extending in the vertical direction are connected to the lower ends of the links 45, 45. The upper ends of the support rods 46 are connected.

  The pair of left and right leveling body support rods 46 and 46 are vertically moved by a pair of left and right first link members 47a and 47a and second link members 47b and 47b attached to the planting frame 26. It is pivotally supported in a slidable direction.

  The first link members 47a and 47a are pivotally supported at one end on the first planting frame side pivotal support portion 26A of the planting frame 26 and at the other end at midway portions of the leveling body support rods 46 and 46. The pivot support piece 46S is pivotally supported by the first leveling body support rod side pivot support portion 46A so as to be swingable.

  The second link members 47b and 47b are pivotally supported at one end on the second planting frame side pivotal support portion 26B of the planting frame 26 and at the other end with the second leveling of the leveling body support rods 46 and 46. The body rod side pivotal support portion 46B is pivotably supported.

  The first link members 47a, 47a and the second link members 47b, 47b form a parallel link, and the leveling body support rod 46, between the planting frame 26 and the leveling body support rod 46, 46 can be moved up and down, and the ground leveling body support rods 46 and 46 are restricted from swinging in the longitudinal direction of the machine body.

  Further, as will be described in detail later, the leveling body support rods 46 and 46 pivotally support the middle portions of the left and right rotation support shafts 39 and 39 at the lower end portions.

  In addition, a base end portion of an elevating operation lever 48 extending forward is attached to a central portion of the rotation support shaft 43 via a lever support 49. Therefore, by rotating the lifting operation lever 48 in the vertical direction, the leveling rotator 40 of the leveling device 4 is moved via the lifting arms 44, 44, the links 45, 45, and the pair of left and right leveling body support rods 46, 46. Can be moved up and down.

  In addition, a guide plate 54 used for holding the position of the elevating operation lever 48 is attached to the planting frame 26 via a support plate 51. The guide plate 54 is for fixing the height of the rotor body at a desired position when the elevating operation lever 48 is rotated in the vertical direction.

  That is, a plurality of grooves (not shown) are formed in the guide plate 54 along the rotation locus of the lifting operation lever 48 in a direction orthogonal to the rotation locus, and the guide plate 54 of the lifting operation lever 48 and An engaging piece (not shown) that is detachably engaged with the groove is disposed at the opposite position, and the rotor body 6 is brought to a desired height by operating the elevating lever 48. By engaging the combined piece with the groove, the lifting operation lever 48 is fixed at a desired angle, and the height of the rotor body 6 is fixed.

  The rotation support shaft 43 is provided with a wire connecting piece 48b. A sliding wire 52 is attached to the wire connecting piece 48b.

  When the elevating operation lever 48 is rotated upward, the tension applied to the sliding wire 52 is reduced, and the above-described clutch mechanism 105 is engaged. When the elevating operation lever 48 is rotated downward, the operating arm 126 used to engage and disengage the clutch is actuated by the pulling force of the sliding wire 52, and the clutch mechanism 105 is disengaged.

  That is, when the lifting operation lever 48 is turned upward to reduce or contact the distance between the rotor body 6 and the farm scene, power is transmitted to the rotation support shafts 39, 39 of the rotor body 6. On the other hand, when the distance between the rotor body 6 and the field scene is increased, the transmission of power to the rotary support shafts 39 and 39 is cut off, and the rotation of the rotor body 6 stops and the standby state is reached. It becomes.

  Next, the rotor body 6 of the leveling device 4 and the vicinity thereof will be described in more detail with reference to FIGS. 6 and 7A.

  FIG. 6 is an explanatory view in plan view of the leveling device 4, and FIGS. 7A and 8A are explanatory views of the leveling main body 35 when the rear of the aircraft is viewed from the rear axle case 14 side. FIGS. 7B and 8B are explanatory diagrams of the planting frame 26 when the rear of the airframe is viewed from the rear axle case 14 side.

  The rotor body 6 includes a transmission case 41 disposed substantially in the center in the left-right direction of the airframe, and rotating support shafts 39, 39 having a regular hexagonal cross section extending from the transmission case 41 toward the left and right sides of the airframe. A plurality of leveling rotators 40 are concentrically mounted on the rotation support shafts 39 and 39.

  The rotor body 6 receives the power transmitted by the leveling shaft 37 extending from the transmission unit 20 of the traveling unit 1 by the transmission case 41, and rotates the rotary support shafts 39 and 39 in the direction around the axis. The leveling rotator 40 is rotated to level the ground.

  Further, the rotor body 6 includes a supporting horizontal frame 60 extending in parallel to the rear of the rotation support shafts 39 and 39.

  The supporting horizontal frame 60 plays a role as a reinforcing member that reduces the bending of the rotating support shafts 39, 39 toward the rear of the machine body. In the embodiment, the rotation support shafts 39 and 39 are increased in rigidity by being connected by attachment members 61 arranged at three places) to form a ladder structure.

  That is, the support horizontal frame 60 is connected to the rotation support shafts 39 and 39 by the attachment member 61 at three locations, ie, a substantially central portion in the longitudinal direction of the rotor body 6 and the vicinity of both left and right end portions.

  As shown in FIG. 6, the transmission case 41 is disposed by interlockingly connecting the terminal end of the leveling transmission shaft 37 and the intermediate portion of the rotation support shaft 39, and transmits the rotation of the leveling transmission shaft 37 to the rotation support shaft 39. .

  Here, the reinforcement stay which reinforces the leveling device will be described. FIG. 9 is a perspective view showing a central portion of the leveling device.

  As shown in FIG. 9, a reinforcing stay 22 is interposed between the transmission case 41 and the planting frame 26, and rearwardly applied to the rotation support shaft 39 by a leveling rotator 40 described later during leveling work. It is for holding under the stress of. This reinforcing stay 22 has a telescopic structure, a telescopic part 22a that can be telescopic in the longitudinal direction, and a movable part 22b that can move the rotor body 6 up and down together with the planting part 2 at both ends of the telescopic part 22a. 22c is provided.

  For example, in the case of an 8-row rice transplanter, the planting frame described above is planted horizontally from the planting transmission case 25 and the lower side of the planting transmission case 25 as shown in FIG. A drive shaft member 25a, a planting transmission case vertical member 25b erected from the upper part of the planting transmission case 25, a seedling table horizontal member 27a laid horizontally in the left-right width direction of the seedling table 27, And a seedling stand vertical member 27b provided in the vertical direction.

  Further, for example, in the case of a six-planted rice transplanter, as shown in FIG. 7 (B), a planting transmission case 25, a planting drive shaft member 25a laid from the side surface below the planting transmission case 25, The planting transmission case vertical member 25b erected from the upper part of the planting transmission case 25, the gate-shaped member 25d erected from the end of the planting drive shaft member 25a, and the seedling mount 27 laid horizontally And a seedling table lateral member 27a.

  The reinforcement stay 22 has an expandable structure whose length can be adjusted, that is, an expandable part 22a whose length can be adjusted in the traveling direction, and a movable part 22b which is a link mechanism having a U-shaped cross section at both ends of the expandable part 22a. , 22c. Each of the movable parts 22b and 22c is movable corresponding to the vertical movement of the leveling device 4 and the vertical movement of the planting part 2. For example, the length of the reinforcing stay 22 can be appropriately changed even if the size of the body of the stretchable portion 22a is different, such as a 6-row planting machine and an 8-row planting machine.

  One movable part 22b is pivotally supported by an L-shaped passive part 23 that is welded to the plate 41U on the upper part of the transmission case 41, and the other movable part 22c is planted in the lower part of the planting frame 26. A case 25 is disposed and is pivotally supported by a trapezoidal passive portion 24 that is welded to a right side surface 25R of a planting drive shaft member 25a extending in the left-right direction of the planting transmission case 25.

  The passive portion 23 is provided on the plate 41U at the top of the transmission case 41, but may be provided on the rear side of the transmission case 41 (on the opposite surface of the input shaft). Further, although the passive portion 24 is provided on the right side surface 25R of the planting transmission case 25, it may be the bottom surface of the planting transmission case 25 as long as it does not interfere with driving of the planting portion 2 or the like. Further, it may be provided on the planting drive shaft member 25a other than the planting transmission case 25. As long as the external force in the longitudinal direction of the body can be regulated, the reinforcing stay 22 does not limit the mounting position, and does not limit the structure or mounting method of the reinforcing stay.

  Therefore, when a stone or a foreign object collides with the leveling device 4 during work travel, when an external force acts on the leveling device 4 from the front-rear direction of the aircraft, the deflection of the leveling device 4 and the drive shaft can be reduced. Interference with the float 29, which is a peripheral member, is prevented. The bearing in the drive system of the leveling device 4 and the bending stress of the shaft can be reduced, and the effect of preventing deformation and breakage can be obtained.

  Further, as the number of planting strips in the planting section 2 increases, the overall length in the left-right width direction of the leveling device 4 becomes longer, and the warp is performed on a support horizontal frame 60 (see, for example, FIG. 6) that supports the leveling device 4 in the left-right width direction. (Elastic deformation) may occur, but adjustment and correction can be performed by the reinforcing stay 22, and it is possible to prevent misalignment of the drive shaft of the leveling device 4 during factory assembly. In addition, since the dimensions of the components differ when the size of the rice transplanter A changes, for example, the reinforcement stay 22 can be shared from a small rice transplanter of class 4 to a large rice transplanter of class 8 or more. You can go down.

  The end part in the left-right width direction of the leveling device shown in FIG. 8 has a bent structure, and details will be described with reference to FIG.

  As shown in FIG. 10, the leveling device 4 has a structure that bends the end in the left-right width direction. For example, when the rice transplanter A is placed on a loading platform such as a light truck and transported, With this folding structure, the flip-up portion 200 disposed at the end of the rotor body 6 can be bent upward to save space.

  FIG. 10 shows the flip-up portion 200 disposed on the right side of the rotor body 6. However, since the left-hand side of the rotor body 6 has the same structure, the left-side flip-up portion is shown here. A description of 200 is omitted.

  It consists of a movable side frame 65 horizontally mounted on the upper part, a rotary support shaft 39 pivotally supported on the movable side frame 65, and a rotating body 40 for leveling mounted on the rotary support shaft 39, and one end of the movable side frame 65 is It has a foldable interlocking mechanism and is foldably connected to one end of the fixed side frame 66.

  That is, a long hole 65b is formed at one end of the movable side frame 65, and the movable side frame 65 and the fixed side frame 66 can be folded freely by loosely fitting via a pin 65c provided at one end of the fixed side frame 66. Connect to

  When assembling, the movable side frame 65 is moved from the flip-up state to the horizontal connection state using the long hole 65b, and the movable side frame 65 is separated from the fixed side frame 66 using the long hole 65b.

  Thereafter, the movable side frame 65 is brought close to the direction of the fixed side frame 66, and the rotation support shaft 39 end portion 69 of the fixed side frame 66 and the rotation support shaft 39 end portion 68 of the movable side frame 65 are connected via an interlocking mechanism. State. The interlocking mechanism connects the connecting plate to the end portion of the rotation support shaft 39 of the fixed side frame 66, and the rotation support shaft 39 end portion 68 of the movable side frame 65 has a pin hole provided in the fixed side frame 66. By connecting the abutting plates provided with protruding pins to be inserted, the respective plates are brought into contact with each other, so that the pins are inserted into the pin holes, and the respective rotation support shafts 39 are integrally coupled.

  In the figure, the frame 66a is erected at a predetermined position of the fixed side frame, and supports the middle of the movable side frame 65 when the movable side frame 65 is folded. The fixed side frame 66 and the movable side frame are provided to fix the movable side frame 65 to the support portion, and the screw holes 65a are connected and fixed integrally with the fixed side frame 66 when the movable side frame 65 is in a horizontal state. It is provided at 65 required locations.

  Here, the leveling rotator will be described with reference to FIGS. 11 to 14. FIG. 11 is a diagram illustrating a leveling rotator. FIG. 12 is a view including a closing body in the leveling rotator. FIG. 13 is a diagram illustrating another example of the leveling rotator. FIG. 14 is a diagram showing a single rotation.

  A number of leveling rotators are mounted adjacent to the rotating spindle. As shown in FIG. 11, the leveling rotator 40 is a plate-like body 40a having a regular thickness and a regular hexagonal cross section. At the center, a regular hexagonal hole that matches the cross-sectional shape of the rotation support shaft 39 is formed as an opening 40b. In addition, the flat surface 40d of the outer peripheral surface 40c of the leveling rotator 40 having a regular hexagonal cross section is attached with a flat-plate 40P having a sawtooth shape at the tip so as to protrude from the outer peripheral corner end 40e.

  The leveling plate 40P is for leveling the uneven field just before planting seedlings by rotating together with the leveling rotator 40, and the tip 40f in contact with the field is formed in a sawtooth shape and the leveling plate. The width of 40P is larger than the width of the leveling rotator 40, and the left and right end portions 40g of the leveling plate 40P are configured to project outward from the side end surface 40h of the leveling rotator 40.

  Therefore, the concave space 40S is formed by the enclosure between the left and right end portions 40g of the flat plate 40P and the side end surface 40h of the leveling rotary member 40. As described above, the concave space portion 40S is formed on the side of the flat plate 40P, whereby the weight of the leveling rotary body 40 can be made as light as possible.

  As shown in FIG. 12, in the concave space portion 40S, straw scraps and the like in the field enter the concave space portion 40S during the leveling operation of the leveling plate 40P as the leveling rotator 40 rotates, and are wound on the rotation support shaft 39. There is a fear. In order to prevent entrapment of such waste scraps and the like, the closing body 70 is detachably attached to the opening edge 40i of the concave space portion 40S of the leveling rotary body 40.

  That is, the groove portion 40T is formed on the inner side surface 40k of the left and right end portions 40g of the flat plate 40P located on the inner peripheral surface 40j of the concave space portion 40S. By fitting the peripheral edge portion 70A of the closing body 70 that closes the opening portion of the concave space portion 40S into this groove portion 40T, the opening portion of the concave space portion 40S, that is, the outer edges of the left and right end portions 40g of the flat plate 40P are provided. The vicinity of the connected virtual plane is closed. Further, as shown in FIGS. 11 and 12, the groove portion 40T is formed in a concave shape on the inner side surface 40k of the leveling plate 40P. However, as shown in FIG. The closure body 70 may be attached by forming a stepped groove 40T ′ on the inner side surface 40k.

  Since the closing plate is provided on the leveling rotator, when the leveling device is rotated, it is possible to prevent the foreign matter from becoming entangled with the leveling rotary member, and to prevent the foreign matter from being wound around the rotating support shaft or the like. Further, the rotating operation of the leveling rotator can be performed smoothly as usual while maintaining the concave space portion of the leveling rotator that contributes to the weight reduction of the leveling device.

  Moreover, it is a structure in which the closing plate can be easily attached and detached, and maintenance can be performed smoothly.

  Furthermore, since it is a split structure, each rotating unit is held between the rotating support shafts, so that the assembling work can be improved.

  As described above, when the leveling rotary body 40 is attached to the rotary support shaft 39, or when the closure body 70 is fitted and attached to the groove portion 40T of the inner side surface 40k of the flat plate 40P, such attachment and removal work can be performed smoothly. In addition, the regular hexagonal leveling rotary body 40 has a divided split structure.

  That is, as shown in FIG. 12, the rotation support shaft 39 is formed in a regular hexagon having a polygonal cross section, and a polygonal shape that fits the hexagonal cross section of the rotation support shaft 39 is formed at the center of the leveling rotary body 40. A hexagonal insertion hole 40U is formed, and the leveling rotator 40 interferes with the insertion hole 40U, that is, the insertion hole 40U is divided into two 180 ° with respect to the central portion as left and right rotation units 72, 72, Moreover, the two dividing lines are set at positions that pass through the center of the opposing flat outer surface of the regular hexagonal shape. Further, the leveling rotator has a hexagonal outer peripheral edge, and the insertion holes 72U are inserted between the adjacent flat surfaces in the case where the rotating single bodies divided into two are combined.

  Therefore, as shown in FIG. 14, when the leveling rotary body 40 is mounted on the rotary spindle 39 having a hexagonal cross section, the rotary spindle 39 can be rotated from the front and rear or the top and bottom of the rotary spindle 39 by the two rotary single bodies 72 and 72. The two rotating single bodies 72, 72 are connected and fixed by aligning the divided surfaces of the rotating single bodies 72 with each other.

  Further, when fitting the closing body 70 in the groove 40T on the inner side surface 40k of the flat plate 40P, first, after inserting the insertion hole 70U of the closing body 70 into the rotating support shaft 39 and holding it in a predetermined position, one piece The rotating unit 72 is mounted on one side of the rotating support shaft 39 by fitting the peripheral portion 70A of the closing body 70 to the groove portion 40T provided on the inner surface of the flat plate of the rotating unit 72 of the rotating unit 72. By fitting the peripheral edge portion 70A of the closing body 70 into the groove portion 40T of the flat plate 40P of the single body 72 so that both the rotary single bodies 72, 72 are united, each rotary single body 72 serves as the rotary body 40 for leveling. At the same time as being attached to 39, the closed body 70 closes the opening of the concave space 40S of the leveling rotary body 40.

  When the divided rotary units 72 and 72 are combined so as to become the leveling rotary body 40 with the rotary support shaft 39 having a hexagonal section in between, the two rotary units are fastened together. The bolts 73 and nuts 74 which are members are integrally connected and fixed.

  Between the outer peripheral flat surfaces of the ground leveling rotary body 40 formed by combining, two bolt insertion holes 72U are inserted and formed in parallel with the central insertion hole 40U interposed therebetween.

  The opening end 72B of the insertion hole 72U in one divided rotating body is a hexagonal nut fitting recess 72C that matches the outer shape of the nut 74, and the opening end 72A of the insertion hole 72U in the other divided rotating body is The bolt 73 is inserted and screwed into the nut 74 fitted into the nut fitting recess 72C of one of the divided rotary units, thereby integrally connecting and fixing the divided rotary unit into two. The insertion holes 72U are provided with seats 72E and 72F on which bolts and nuts are placed.

  The nut fitting recess 72C provided on one of the divided rotary bodies is formed in a hexagonal shape that matches the outer shape of the nut, and the nut is fitted on the facing wall 72H of the inner peripheral surface 72G of the nut fitting recess 72C. In order to prevent the nut 74 fitted in the recess 72C from being detached from the nut fitting recess 72C and being removed, a flexible interference piece 72D for preventing the nut from coming out is provided in an annular or protruding shape.

  Therefore, in the conventional method of fixing the leveling rotator 40 to the rotation support shaft 39 with a pin, the hole for fixing the pin becomes larger due to long-term use, and the leveling rotator 40 may be rattled. The leveling rotator has a hexagonal outer shape of the rotating support shaft 39 and the outer peripheral surface of the rotating support shaft 39 is sandwiched and fixed by the rotating unit 72, so that the rotating unit 72 does not rattle even after a long period of time. Durability can be improved. Since the conventional man-hours for pin fixing are eliminated, the rotating single bodies 72, 72 can be easily detached from the rotating support shaft 39, and workability can be improved.

  In addition, without newly providing a fastening portion that is pivotally supported on the rotation support shaft by the conventional pin, the fastening insertion hole is inserted into the rotation unit, and the fastening member is fastened through the insertion hole. Can be reduced, the configuration can be simplified, and the leveling rotary body 40 can be made compact.

  Further, the outer shape of the nut 74 matches the inner shape of the nut fitting recess 72C without any gap, so that there is no need to stop the nut 74 with a jig as in the prior art, and the bolt 73 can be fastened. The assembly workability of the leveling device 4 can be improved.

  When the bolt 73 and the nut 74 are fastened or when the nut 74 is processed after the bolt 73 is removed, the interference piece 72D can be removed by simply inserting the nut 74 into the nut fitting recess 72C or removing the bolt 73. It is possible to prevent the nut 74 from falling off, prevent the nut 74 from being lost, and improve the assembly or disassembly work.

  Next, the bowl-shaped cover body of the leveling rotator will be described. 15 is a perspective view showing a state in which a hook-shaped cover body is attached to the leveling rotary body, FIG. 16 is a cross-sectional view showing a mounting position of the hook-shaped cover body, and FIG. 17 is a view of the leveling device of FIG. FIG. 4 is a partially cutaway front explanatory view showing a main part of a rotation spindle 39.

  Here, in the six-row planting rice transplanter according to the present embodiment, as shown in FIG. 7, the leveling rotator group 75 formed by connecting a plurality of leveling rotators 40 is connected to the rotation support shaft 39. Four groups are mounted on the left and right. Further, in the eight-row planting rice transplanter according to the present embodiment shown in FIG. 8, six groups of the same leveling rotator group 75 are mounted on the rotation support shaft 39.

  A cover body 71 having a substantially circular shape when viewed from the front is attached to the concave space 40S of each leveling rotator 40 located at both ends of each leveling rotator group 75.

  This bowl-shaped cover body 71 includes a bearing portion 71A formed so that the rotation support shaft 39 can be inserted in a substantially central portion when viewed from the front, and the rotation support shaft 39 is inserted through the bearing portion 71A. And disposed in the vicinity of the left and right side surfaces of the leveling rotor group 75.

Further, the edge of the bowl-shaped cover body 71 is bent to form a circular peripheral wall 71C, and this circular peripheral wall 71C is fitted into the concave space portion 40S of the leveling rotary body 40 and attached. .
The attachment of the cover body 71 can include, for example, the following two types of attachment forms.

  First, as shown in FIG. 16A, the first mounting form is such that the circular peripheral wall 71C of the bowl-shaped cover body 71 is fitted into the concave space portion 40S, and the bowl bottom 71D of the bowl-shaped cover body 71 is flat. It is in a state of projecting outward from the left and right end portions 40g of 40P, and in a state in which a bowl-shaped cover body 71 is welded to the bearing portion 71A.

  In addition, as shown in FIG. 16B, the second mounting form is such that the saddle bottom portion 71D of the bowl-shaped cover body 71 is located at the left and right end portions 40g of the flat plate 40P, and the bowl-shaped cover The body 71 is welded to the bearing portion 71A.

  The cover body 71 disposed on the side surface portion of each leveling rotary body group 75 is fixed to the rotation support shaft 39.

  In other words, the cover body 71 is prevented from rotating with the rotation of the rotation support shaft 39.

  That is, a sliding member such as a bearing is interposed between the bearing portion 71A of the cover body 71 and the rotation support shaft 39 inserted through the coaxial receiving portion 71A, and even when the cover body 71 is fixed. The rotation support shaft is configured to be rotatable.

Next, the attaching / detaching structure and the mounting position of each cover body 71 will be described with reference to FIG.
First, the cover body 71 provided on the outermost side in the left-right width direction of the rotor body 6 will be described. The cover body 71a provided on the outermost side is characterized in that it has a detachable structure.

  That is, the cover body 71a disposed on the outermost side of the rotor body 6 includes a cylindrical bearing portion 71A that is inserted into and positioned at the end portion of the rotation support shaft 39, and a circular plate that closes the side surface of the end portion of the rotation support shaft 39. The cylindrical bearing portion 71A is mounted on the peripheral surface of the end portion of the rotation support shaft 39.

  The cover body 71a is attached by welding to the bearing part 71A, and a plate 65f is attached to the bottom part 71D of the cover body 71a by welding.

  The plate 65f and the fixed plate 65e at the end of the movable side frame 65 are connected and fixed with bolts and nuts as fixing parts 65g.

  Further, the two cover bodies 71b and 71c on the transmission case 41 side, which are the end portions of the flip-up portion 200, are mounted on the rotation support shaft 39 via the bearing portion 71A on the mounting member 65d and the mounting member 65d. Is attached to the movable frame 65.

  Next, the cover bodies 71d and 71e disposed in the vicinity of the base end portion of the leveling body support rod 46 are respectively attached to the rotation support shaft 39 via the bearing portion 71A.

  Further, the cover body 71f adjacent to the transmission case 41 is disposed with the bottom portion 71D of the cover body 71f in contact with the side surface portion of the transmission case 41, and the rotation support shaft 39 via the bearing portion 71A. It is attached to.

  Further, the cover body 71g adjacent to the transmission case 41 is attached to the rotary support shaft 39 via the bearing portion 71A, and the end portion of the cylindrical cover 106 attached to the periphery of the rotary support shaft 39 and the bearing portion. The cylindrical cover 106 is attached to the transmission case 41.

As described above, by arranging the cover body 71 on the leveling rotary body group 75, when the leveling rotary body 40 of the leveling device 4 is rotated, entry of straws and foreign matters can be reduced. .
Further, since the cover body 71 is disposed on the rotation support shaft 39 via a sliding member such as a bearing, the cover body 71 does not rotate integrally with the rotation support shaft 39. Therefore, the cover body 71 serves as a scraper for mud and straw attached to the concave space portion 40S of the leveling rotator 40, thereby reducing the entanglement of the wall and foreign matter in the concave space portion 40S. Can be made.

  In addition, since the winding of the straw or the like is reduced, the ground leveling device 4 can be easily cleaned and maintained without the need to remove the straw wound around the leveling device 4.

  In addition, since the wrapping of the straw and the like is reduced, the sealing material can be prevented from being damaged.

  Since the cover body 71a attached to the outermost part of the rotor body 6 has a detachable structure as described above, maintenance of the outermost part of the rotor body 6 in which a crack or the like is likely to be entangled can be performed satisfactorily.

  In addition, since the hook-shaped cover body 71 is welded to the bearing portion 71A and integrally provided on the rotary support shaft 39, it is not necessary to provide a separate wrapping prevention member such as a straw and the number of new parts is increased. In addition, while preventing an increase in the weight of the leveling device 4, it is possible to reduce the entanglement of straw and foreign matters.

  Further, since the rotation support shaft 39 at the right and left halfway portion and the outermost right and left end portions is covered with the hook-shaped cover body 71, winding of a straw or the like can be reduced.

  Furthermore, since the structure is detachable, it becomes easier to clean after the work is completed, and the maintenance of the leveling device 4 can be improved.

  In addition, since the cover body 71 is also provided in the bent portion of the bending mechanism, the winding of the waste dust or the like around the bent portion can be reduced, and the rotation support shaft 39 can be protected.

  For example, the 6-jo rice transplanter is composed of four groups of leveling rotators, and the leveling rotators are arranged at both ends of the transmission case, both ends of the midway, and the outermost end leveling rotator. Eight bowl-shaped cover bodies 71 are attached via bearings (see FIG. 7). For example, the 8-jo rice transplanter further has a bending mechanism on the rotation shaft in the left-right direction, and is composed of six groups of leveling rotary bodies. Twelve bowl-shaped cover bodies 71 are interposed via bearings. It is attached (see FIGS. 8 and 17).

  Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment. For this reason, it is a matter of course that various modifications can be made in accordance with the design and the like as long as they do not depart from the technical idea according to the present invention other than the embodiments described above.

It is a side view which shows the rice transplanter which concerns on this invention. It is a side view which shows the principal part of the rice transplanter concerning this invention. It is a side view which shows the principal part of the rice transplanter concerning this invention. It is a top view which shows the principal part of the rice transplanter which concerns on this invention. It is a side view which shows the principal part of the rice transplanter concerning this invention. It is a top view which shows the principal part of the rice transplanter which concerns on this invention. (A) It is a schematic diagram which shows the leveling apparatus of the rice transplanter which concerns on this invention. (B) It is a schematic diagram which shows the leveling apparatus of the rice transplanter which concerns on this invention. (A) It is a schematic diagram which shows the leveling apparatus of the rice transplanter which concerns on this invention. (B) It is a schematic diagram which shows the leveling apparatus of the rice transplanter which concerns on this invention. It is a perspective view which shows the leveling apparatus of the rice transplanter which concerns on this invention. It is a schematic diagram which shows the principal part of the leveling apparatus of the rice transplanter which concerns on this invention. (A) It is a top view which shows the rotary body for leveling. (B) It is a side view which shows the rotary body for leveling. (A) It is a schematic diagram which shows the rotary body for leveling. (B) It is a side view which shows the rotary body for leveling. It is a side view which shows the other rotary body for leveling. (A) It is a side view which shows the rotary body for leveling. (B) It is sectional drawing which shows the rotary body for leveling. It is a perspective view which shows a cover body. It is a side view which shows a cover body. It is a partially notched front explanatory drawing which shows the principal part of the rotating spindle of the leveling apparatus of FIG.

Explanation of symbols

A Rice transplanter 1 Traveling part 2 Planting part 3 Lifting mechanism 4 Leveling device 22 Reinforcing stay 35 Leveling body 36 Transmission mechanism part 37 Leveling transmission shaft 38 Lifting support frame 39 Rotating spindle 40 Grounding rotary body 41 Transmission case 70 Closure body 71 Cover body 72 Rotating single body 76 Rotating body group for leveling

Claims (3)

A leveling device that is connected to the rear of the traveling unit so as to be movable up and down and is leveled by rotational movement in front of the planting unit and in the lateral width direction of the planting unit is attached. In a rice transplanter consisting of an extended rotating spindle and a leveling rotating body mounted integrally adjacent to the rotating spindle,
A rice transplanter characterized in that a reinforcing stay is interposed between a substantially central portion of the rotating support shaft in the left-right width direction and a planting frame that supports the planting unit. 2. The rice transplanter according to claim 1, wherein the reinforcing stay is interposed between a transmission case that transmits power from a prime mover part to the rotating support shaft and a planting frame that supports the planting part. . The rice transplanter according to claim 2, wherein the reinforcing stay has a telescopic structure adjustable in a length direction.

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