JP2006345820A5 - - Google Patents

Description

Seedling transplanter

  The present invention relates to a seedling transplanter such as a riding rice transplanter.

In a seedling transplanter with a seedling planting part on the rear side of the traveling vehicle body, the headland becomes rough when the aircraft turns, and the marks of the wheels are attached. A special device for leveling irregularities was required.
In order to solve the above problem, in Patent Document 1, a rotor that is rotationally driven between the traveling vehicle body and the planting part is provided so as to be movable up and down with respect to the planting part, thereby enabling leveling of the headland. A transplanter has been proposed.

Further, Patent Document 2 proposes a seedling transplanter that takes a forward leaning posture so that only the front part of the float is grounded and the rear part is not grounded when the machine is turning so as not to roughen the field scene of the turning part.
Japanese Patent Laid-Open No. 2003-102219 Japanese Patent Laid-Open No. 2003-333906

  The roughness of the headland is leveled to some extent by attaching a rotor as in the configuration described in Patent Document 1 or by grounding only a part of the float as in the configuration described in Patent Document 2. I can. However, in the configuration described in Patent Document 1, the roughness of the entire field scene is eliminated by simply lowering the rotor and leveling the field scene of the headland when planting seedlings in the headland, which is the final process. Is insufficient.

Further, in the configuration described in the above-mentioned Patent Document 2, the airframe can be turned without raising the entire float, and the turning efficiency has been improved. However, it is still insufficient to eliminate the roughness of the entire field scene with only the float. There is no proper leveling work.
Further, when a load is applied to a rotor that is an example of a leveling device, the life of the rotor is shortened, and there may be a problem in terms of economical and work efficiency of the leveling device.

An object of the present invention is to solve the above-mentioned problems and to realize an appropriate leveling work in a farm field.
Furthermore, the subject of this invention is providing the seedling transplanting machine with sufficient working efficiency which reduced the load concerning a leveling apparatus and improved the durability of the leveling apparatus.

The said subject of this invention is achieved by employ | adopting the following structures.
First aspect of the present invention, movable up and down the NaeUe mounting portion (4) to the rear side of the vehicle body (2) having a wheel (10, 11) before and after the seedling planting unit in (4) In a seedling transplanting machine provided with a pair of left and right drawing markers (53) for drawing the course of the aircraft in the next stroke to the topsoil surface, and provided with a leveling device (27) on the rear side of the traveling vehicle body in front of the seedling planting part (4) In the seedling transplanting machine, the leveling device (27) can be moved up and down obliquely in the front-rear direction with respect to the seedling planting part (4) by a slide mechanism (29, 33).

  In the invention according to claim 2, the seedling planting part (4) is connected to the traveling vehicle body (2) so as to be movable up and down by the lifting and lowering connecting device (3), and the seedling planting part (4) is lowered. Then, the lifting and lowering connecting device (3) is lowered rearward, and when the seedling planting part (4) is in the raised position, the lifting and lowering connecting device (3) is rearwardly raised. When the planting part (4) is in the lowered working state, the construction becomes larger. When the seedling planting part (4) is in the working state, the leveling device (27) is below the axle of the rear wheel (11). The seedling transplanter according to claim 1, wherein the seedling transplanter is configured as described above.

According to the first aspect of the present invention, the aircraft course in the next stroke can be drawn on the topsoil surface by the drawing marker (53), and the leveling device (27) can be drawn by the slide mechanism (29, 33). Since the structure can move up and down diagonally with respect to the attachment portion (4), the leveling device (27) can move up and down by dispersing the gravity, and the leveling device (27) can move up and down smoothly. Further, since the leveling device (27) is moved up and down by the slide mechanism (29, 33), the longitudinal movement of the leveling device (27) can be suppressed as much as possible, and the longitudinal length of the airframe can be reduced.

  According to invention of Claim 2, in addition to the effect of invention of Claim 1, at the time of seedling planting work of the seedling planting part (4), the rear wheel (11), the leveling device (27), and the seedling planting The front and rear lengths of the body can be reduced as compared with the conventional seedling transplanting machine by bringing the attachment portions (4) closer to each other. As a result, the balance in the front-rear direction of the seedling transplanter is improved, the running performance is improved, the seedling planting work performance is also improved, and the headland width can be particularly narrowed. Furthermore, since the seedling planting part (4) is separated from the rear wheel (11) when the seedling planting part (4) is raised, the rear wheel (11) can be moved even if the leveling device (27) is moved upward and moved forward. Can be prevented from interfering with.

  A six-row planting type rice transplanter as an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall side view of the riding type rice transplanter of this embodiment, and FIG. 2 is a plan view of the rice transplanter of FIG. In this rice transplanter 1, a seedling planting part 4 as an agricultural work machine part is connected to a rear side of the traveling vehicle body 2 via a lifting and lowering connecting device 3 so as to be lifted and lowered. The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and rear wheels 11 and 11 which are drive wheels. A mission case 12 is disposed at the front of the fuselage. Front wheel final cases 13 and 13 are provided on the left and right sides of the front wheels, and front wheels 10 and 10 are attached to front wheel axles that protrude outward from a front wheel support portion that can change the steering angle of the front wheel final cases 13 and 13. . Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and the rear wheel gear case 18 is supported by a rear wheel rolling shaft provided horizontally at the front and rear of the rear end of the main frame 15 in the horizontal direction. The rear wheels 11 and 11 are attached to the rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a first belt transmission device 21 and a second belt transmission device 23 capable of continuously variable transmission. Then, after being shifted by the transmission in the transmission case 12, the power is separated into traveling power and external power to be extracted.

  A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear portion of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 through a planting transmission shaft 26.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 that houses various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The rear portions of the front cover 32 and the floor step 35 are rear steps 36 that are higher than the floor step 35. On both the left and right sides of the front part of the traveling vehicle body 2, spare seedling platforms 38, 38 on which replenishment seedlings are placed are provided so as to be pivotable between a position projecting laterally from the machine body and a position stored inside. ing.

  The lifting and lowering connecting device 3 has a parallel link configuration, and includes a single upper link 40 and a pair of left and right lower links 41 and 41. These links 40, 41, 41 are rotatably supported by a link base frame 42 erected on the rear end portion of the main frame 15 on the base side, and a vertical link 43 is connected to the tip side. And the connection member 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so that rolling is possible centering | focusing on the connection member 44.

  A piston rod (not shown) of an elevating hydraulic cylinder 45 whose base is pivotally attached to the main frame 15 is connected to the tip of a seedling support frame 46 formed integrally with the upper link 40 via a spring, By expanding and contracting the cylinder 45 with hydraulic pressure, the upper link 40 rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, and a seedling mount that carries seedlings and reciprocates left and right to feed seedlings one by one to the seedling outlet 51a (FIG. 2). A stand 51, a seedling planting device 52 for planting seedlings supplied to the seedling outlet 51a in the field, and a pair of left and right drawing markers 53, 53 for drawing the aircraft path in the next stroke to the topsoil surface.

  In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55 and 56 in contact with the mud surface of the field, the floats 55 and 56 slide while leveling the mud surface, and seedlings are planted by the seedling planting device 52 on the ground level. . Each of the floats 55 and 56 is pivotably attached so that the front end side moves up and down according to the unevenness of the field soil surface. Up and down movement of the front part of the center float 55 is detected by a vertical movement detection mechanism during planting work. Then, according to the detection result, the planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 45 to raise and lower the seedling planting unit 4.

  Although not shown in detail, the seedling planting section 4 is slidable left and right by the power on the traveling vehicle body via the planting transmission shaft 26 (FIG. 1). By the movement, the seedling positioned at the lowermost stage of the seedling placing stand 51 is supplied to the seedling taking-out port 51a (FIG. 2), and the seedling planting device 52 plants the seedling on the field. When the seedling stage 51 moves to the end of the left and right strokes and all the seedlings at the lowest stage are planted, the seedling feeding belt 60 is operated to transfer the seedlings on the stage downward by one stage.

  A transmission clutch 50 (not shown) is provided in the transmission case 50 for switching the operation and stop of the seedling planting device 52 in two adjacent units. Since this clutch is often operated “disengaged” at the time of work on the heel side, it is usually called the “slave clutch” described above. The hook clutch is turned on and off by the hook clutch lever 54 provided on the handle post.

At this time, in the case of a 6-row planting rice transplanter, the heel clutch lever 54 is provided for each of the two seedling planting tools 62.
The seedling planting unit 4 is provided with a rotor 27 as an example of a leveling device. The rotor 27 is provided at the lower end of a rod 29 that moves up and down in the boss, and the rod 29 moves up and down the rotor 27 by a motor 24 for moving up and down the rotor provided on the back surface of the seedling table 51. It has become. The rod 29 is slidably mounted in a boss 33 attached via a boss support frame 28 provided on the back surface of the seedling mount 51.

  In addition, the seedling planting part 4 is moved up and down by the vertical movement of the vertical links 40 and 41, and the vertical links 40 and 41 are rearwardly lowered in the lowered work state, and the vertical links 40 and 41 are rearwardly raised at the highest position. The inclination angle of the links 40 and 41 with respect to the ground is larger in the working state.

  Further, the boss 33 is attached to the seedling stage 51 in a state of being inclined forward with respect to the ground so as to be slid in the obliquely upward direction within the boss 33 of the rotor 27. Therefore, the rotor 27 can move up and down smoothly by dispersing the gravity. Further, since the rotor 27 moves up and down by a slide mechanism in an oblique direction with respect to the ground, the amount of forward and backward movement is small, and the longitudinal length of the body is not increased unnecessarily.

  In addition, when the seedling planting unit 4 is in the working state, the inclination angle of the links 40 and 41 with respect to the ground is larger in the working state than in the case of the raising state. The planting part 4 can be brought close to each other to reduce the longitudinal length of the aircraft. Therefore, the balance in the front-rear direction of the seedling transplanter is good, and traveling performance and seedling planting work performance are not impaired. Further, when the seedling planting unit 4 is in a working state, the rotor 27 that is a leveling device is located below the rear wheel axle, so that for example, the headland width can be reduced.

  Further, when the seedling planting part 4 is in the raised state, the upper and lower links 40 and 41 are rearwardly raised, and the seedling planting part 4 is separated from the rear wheel 11, so that the rotor 27 is moved forward when the rotor 27 is moved up. Even if it moves and approaches the height of the rear wheel axle, it can be prevented from interfering with the rear wheel 11.

  In this embodiment, a sensitivity adjustment lever 39 (sensitivity adjustment operation tool) that can adjust the sensitivity of the raising / lowering control of the seedling planting unit 4 is provided on the left side of the seat. Therefore, when the adjustment of the sensitivity adjustment lever 39 is adjusted to the most insensitive side during the leveling of the headland, the motor 24 is operated in conjunction with the operation of the sensitivity adjustment lever, and the rotor 27 is automatically lowered to the field scene. Thus, the field can be leveled. Therefore, the sensitivity adjustment lever 39 has a function as an adjustment operation tool for the elevation control sensitivity and an elevation operation tool for the rotor 27.

  Although not shown, when the rotor 27 is rotated via the clutch mechanism, the rotor 27 rotates freely and lightly by disengaging the clutch. Therefore, even when the rotor 27 is lowered to the field, the rotor 27 It rotates following the farming scene and prevents mud from being pushed forward due to forgetting to engage the clutch.

  As shown in FIG. 1, a rotor cover 37 is provided above the rotor 27. However, as shown in the side view of FIG. 3A and the plan view of FIG. As a waterproof cover in front of the center float 55, the vertical movement of the center float 55 or the angle-of-attack control sensor 57 provided on the center float 55 is prevented from being affected by water.

  Further, as shown in the plan view of FIG. 4, the rear portion of the rotor cover 37 corresponding to the gap between the center float 55 and the side float 56 protrudes and is recessed into a groove shape, so that water is fed into the center float 55 and the side float. It may be allowed to flow away from 56. In this case, since the muddy water flow extends rearward from the rotor cover 37 and is discharged rearward from the groove-like portion, mud splash to the center float 55 and the side float 56 is eliminated.

Further, as shown in the side view of FIG. 5, when the rotor 27 is stored, the rotor cover 37 may be shaped so that mud splashing to the floats 55 and 56 can be prevented.
When the rotor cover 37 that should be in the dotted line position in FIG. 5 can be rotated to the solid line position when the rotor 27 is retracted during the work on the farm field, mud from the rear wheel 11 is transferred to the float 55. It can be prevented from hanging.

  In addition, as shown in FIG. 6B, in the conventional general configuration, the rotors 27, 27 on both sides are arranged in a direction in which the rotor rotation axis is orthogonal to the forward direction of the rice transplanter 1, The mud accumulated in front of the rotors 27 on both sides may be pushed out to the side of the aircraft at once.

  However, in the embodiment of the present invention, as shown in the plan view of FIG. 6A, the rotors 27 on both sides are arranged at the outer ends from the direction in which the rotor rotation axis is orthogonal to the forward direction of the seedling transplanter 1. It is also possible to adopt a configuration in which the muddy water is quickly ejected to the sides of the rotors 27 on both sides by arranging the portions inclined rearward. With this configuration, it is possible to prevent the muddy water accumulated in front of the rotor 27 from overflowing to the side, and so-called muddy water pushing to the adjacent strip.

Further, the rotational speed of the rotary rotor 27 may be changed for each unit from each position, and the rotational speed may be decreased toward the outside, that is, the rotation may be slowed.
Since the outer rotor 27 is closer to the adjacent strip, it is possible to reduce the amount of muddy water or the like on the adjacent strip due to the rotation by slowing the rotation.

  A lift link sensor 47 for detecting the position of the lift height of the links 40 and 41 is attached to the link base frame 42. Therefore, the motor (vertical movement actuator) 24 is operated based on the lift link sensor value to lower the rotor 27 when the seedling planting part 4 is raised, and conversely when the seedling planting part 4 is lowered. When the seedling transplanter is turned, the rotor 27 can be used for leveling.

  Conventionally, there has been no function of automatically raising or lowering the rotor 27 in response to the raising and lowering of the seedling planting section 4, but as described above, the rotor 27 corresponding to the raising and lowering of the seedling planting section 4 respectively. When raising or lowering, the rotor can be installed in the full width in the left-right direction of the seedling transplanter.

  As shown in the plan view of FIG. 7, the hydraulic sensitivity performance is improved by using the rotor 27 to level the field in front of both ends of the center float 55 of the five-row seedling transplanter and sensing this region.

  The present invention can be applied to paddy field machines such as a riding type rice transplanter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view showing a six-row planting type rice transplanter that is an embodiment of the present invention. It is a top view of the riding type rice transplanter shown in FIG. It is the side view (FIG. 3 (a) and top view (FIG.3 (b))) explaining the positional relationship of the rotor cover and float of the riding type rice transplanter shown in FIG. It is a top view explaining the arrangement | positioning relationship of the rotor cover and float of the riding type rice transplanter shown in FIG. It is a side view explaining the arrangement | positioning relationship of the rear wheel of the riding type rice transplanter shown in FIG. 1, a rotor cover, and a float. It is the side view (FIG. 6 (a)) explaining the arrangement | positioning relationship of the rotor and rear-wheel of the riding type rice transplanter shown in FIG. 1 and the top view (FIG.6 (b)) explaining the same arrangement | positioning relationship of a prior art. It is a top view explaining the arrangement | positioning relationship of the rotor and float of the riding type rice transplanter shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling vehicle body 3 Elevating connection device 4 Seedling planting part 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 20 Engine 21 First belt transmission device 23 Second belt transmission device 24 Motor 25 Planting clutch case 26 Planting transmission shaft 27 Rotor 28 Boss support frame 29 Rod 30 Engine cover 31 Seat 32 Front cover 33 Boss 34 Handle 35 Floor step 36 Rear step 37 Rotor cover 38 Spare seedling stand 39 Sensitivity adjustment lever 40 Top Link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting member 45 Elevating hydraulic cylinder 46 Seedling stand support frame 47 Lifting link sensor 50 Transmission case 51 Seedling stand 51a Seedling outlet 52 Seedling planting device 53 Drawing Over Ca 54 furrow clutch lever 55 Center Float 56 side float 57 angle of attack control sensor 60 seedlings feed belt

Claims (2)

Movable up and down the NaeUe mounting portion (4) to the rear side of the vehicle body (2) having a wheel (10, 11) back and forth, topsoil surface airframe course in the next stroke in the seedling planting unit (4) In a seedling transplanting machine provided with a pair of left and right drawing markers (53) for drawing on the front and a ground leveling device (27) on the rear side of the traveling vehicle body on the front side of the seedling planting part (4),
A seedling transplanting machine characterized in that the leveling device (27) can be moved up and down obliquely in the front-rear direction with respect to the seedling planting part (4) by a slide mechanism (29, 33).   The seedling planting part (4) is connected to the traveling vehicle body (2) so as to be movable up and down by a lifting and lowering connecting device (3), and in a working state where the seedling planting unit (4) is lowered, the lifting and lowering connecting device (3) When the seedling planting part (4) is in the ascending position, the lifting and lowering connecting device (3) is rearwardly raised, and the inclination angle of the lifting and lowering connecting device (3) with respect to the field scene is lowered by the seedling planting unit (4). When the seedling planting part (4) is in the working state, the leveling device (27) is located below the axle of the rear wheel (11). The seedling transplanter according to claim 1, wherein: