JP2014233269A - Seedling transplanter - Google Patents

Abstract

To provide a seedling transplanter equipped with a turning rotor for ground work, which can firmly support a leveling device that tends to be unstable including turning. In order to support a rotor 27 for leveling a farm scene, the ground leveling support frame 76 that is full in the lateral direction of the traveling vehicle body, the rotor 27 provided on the front side of the vehicle body 2 with respect to the frame 76, and the leveling support frame 76 are provided with a rotor 27. Is a seedling transplanting machine provided with a leveling rotation arm 75 that rotatably supports the seedling, and by supporting the rotor 27 with one leveling support frame 76, the seedling planting portion 4 is raised and the rotor 27 is moved in the field. The rotor 27 can be prevented from sagging due to its own weight when it no longer contacts the ground, so that the rotor 27 sagging when turning the vehicle body 2 or during non-planting work may come into contact with the field scene and be damaged or roughen the field scene. This prevents the seedling from being planted more accurately than before. [Selection] Figure 3

Description

  The present invention relates to a seedling transplanter with a ground work device.

  In a seedling transplanter equipped with a seedling planting apparatus with a float, a configuration is known that includes a rotor for leveling the field just before seedling planting by the seedling planting apparatus.

JP 2012-179014 A

  The seedling transplanter shown in Patent Document 1 is provided with a center for leveling the seedling planting position and left and right leveling rotors. By leveling the unevenness of the field with the leveling rotor, the seedling planting depth is set. To stabilize.

  However, the leveling rotor of the seedling transplanter of Patent Document 1 supports the left and right rotors with a rotor suspension frame provided in the seedling planting part, and the center rotor is supported by the left and right rotors via the left and right rotor transmission cases. Therefore, there is a problem that the connection between the rotors is weak and the rotor is easily damaged in a situation where the rotor is deeply submerged and overloaded.

  In particular, although the central rotor is connected by a suspension spring provided in the seedling planting part, when the seedling planting part is lifted and moved to a non-working position, the central rotor (leveling device) moves downward. It may hang down and come into contact with the farm scene. If the center rotor is in contact with the field scene when the seedling transplanter is turning, the dragged center rotor will be damaged, and the center rotor will ruin the field scene. When seedlings are planted on the ground, there are large irregularities and the seedling planting depth becomes too shallow or too deep.

  The subject of this invention is providing the seedling transplanter provided with the turning rotor for ground work which can support reliably the leveling apparatus which tends to become unstable including the time of turning.

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 equalizes the traveling vehicle body (2) traveling in the field, the seedling planting part (4) for planting seedlings loaded on the rear part of the traveling vehicle body (2), and the field scene where the seedlings are planted. In the seedling transplanter provided with the leveling device (rotor) (27), the leveling support frame (76) full of the traveling vehicle body width direction to support the leveling device (rotor) (27), and the leveling support frame (76) The leveling device (27) is provided in front of the traveling vehicle body (2), and the leveling rotation arm (75) for rotatably supporting the leveling device (27) is provided on the leveling support frame (76). It is a seedling transplanting machine.

  According to the second aspect of the present invention, the leveling rotation arm (75) is connected to the left and right first leveling rotation arms (75a) connecting the left and right side portions of the leveling device (27) and the leveling support frame (76). The first leveling rotation arm (75a) includes a left and right second leveling rotation arm (75b) that connects the leveling device (27) and the leveling support frame (76). The seedling transplanting machine according to claim 1, wherein a leveling vertical movement device (77) for moving the leveling device (27) up and down is provided on the rotating arm (75b).

  According to a third aspect of the present invention, the leveling vertical movement device (77) includes a vertical movement actuator (79) and a sector gear (80), and the sector gear (80) and the second leveling rotation arm (75b) are lifted arms. The seedling transplanter according to claim 2, wherein the seedling transplanter is connected at (81).

  The ground leveling device (27) includes a center rotor (27b), left and right side rotors (27a) provided on the left and right sides of the center rotor (27b) and on the rear side of the traveling vehicle body (2). The left and right rotor transmission cases (73) connect the center rotor (27b) and the left and right side rotors (27a), and the side floats (56) are respectively arranged behind the left and right side rotors (27a). A center float (55) for detecting the depth of the field is disposed between the left and right sides of the side float (56) and the right and left seedling planting transmission case (50) and behind the center rotor (27b), and the first left and right ground leveling Left and right third leveling rotary arms (75c) projecting forward are provided on the rotary arm (75a) toward the front side of the traveling vehicle body (2), and the left and right third leveling rotary arms (75c) are provided. The reinforcing frame (82) is connected to each other, and a bent portion is formed at the center in the left-right direction of the reinforcing frame (82) so as to straddle the center float (55), and has a convex shape in plan view. The seedling transplanter according to 2 or 3.

  According to the fifth aspect of the present invention, when the rake (83) for leveling the farm scene is rotatably attached to the leveling support frame (76) and the leveling device (27) is moved to the non-working position, the rake (83 ) Is grounded, and the rake (83) is attached to the leveling support frame (76) so that the rake (83) is separated from the field scene when the leveling device (27) is moved to the working position. 5. The seedling transplanter according to any one of 1 to 4.

  According to the sixth aspect of the present invention, a long planting depth frame (85) connecting the center float (55) and the left and right side floats (56) is attached to the seedling planting transmission case (50). 83) and a planting depth frame (85) are connected by a connecting rod (86), and the rake (83) is vertically rotated in accordance with the raising and lowering of the seedling planting part (4). The seedling transplanter according to any one of claims 1 to 5.

  According to the seventh aspect of the present invention, a plurality of attachment holes (87a) are formed in the attachment stay (87) for attaching the connecting rod (86) to the planting depth frame (85), and a plurality of attachment holes (87a) are formed. By attaching one end of the connecting rod (86) to any of them, the amount of rotation of the rake (83) corresponding to the amount of raising and lowering of the seedling planting part (4) is changed. Item 7. The seedling transplanter according to Item 6.

  According to the first aspect of the present invention, since the leveling support frame 76 supports the leveling device 27 from the rear, the leveling device 27 can receive the resistance received by the leveling device 27 from the field scene by the leveling support frame 76. Is prevented from floating against resistance, and the unevenness of the field scene is leveled out reliably.

  In addition, by supporting the leveling device 27 with one leveling support frame 76, when the seedling planting unit 4 is raised and the leveling device 27 does not come into contact with the field scene, the leveling device 27 hangs down by its own weight. Therefore, the leveling device 27 that hangs down when the traveling vehicle body 2 turns or is not planted can be prevented from coming into contact with the field scene and being damaged or roughening the field scene. Better than.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the left and right first leveling rotary arms 75a provided with the leveling device 27 and the leveling support frame 76 on the left and right sides, Since the leveling device 27 is supported at a plurality of positions in the left and right directions by connecting the left and right second leveling rotation arms 75b provided between the first leveling rotation arms 75a, the leveling device 27 is lifted by the ground resistance. The leveling is prevented from being lost, and the leveling performance and seedling planting accuracy are improved as compared with the prior art.

  Further, since the leveling vertical movement device 77 is provided on the second leveling rotation arm 75b, the leveling device 27 can be raised and lowered at a position closer to the center of the traveling vehicle body 2. Therefore, when the leveling device 27 is raised and lowered, Therefore, a part of the leveling device 27 does not fully rise and is prevented from coming into contact with the farm scene and being damaged.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the leveling vertical movement device 77 and the second leveling rotation arm 75b are connected by the lifting arm 81, whereby the leveling vertical movement device 77 is connected. Since the working height of the leveling device 27 can be changed in accordance with the lifting / lowering operation, the leveling of the field scene and the seedling planting accuracy are improved. Further, since the leveling device 27 can be sufficiently separated from the field scene during non-leveling work, the field scene is prevented from being roughened and the leveling device 27 is prevented from being damaged due to contact with the field scene.

  According to the invention described in claim 4, in addition to the effects of the invention described in claim 2 or 3, by connecting the front side of the leveling device 27 with the reinforcing frame 82, the components of the leveling device 27 are connected to each other. Since the ground leveling device 27 is prevented from being damaged by contact resistance with the field scene, the leveling device 27 is lifted up integrally when the leveling device 27 is moved to the non-working position. In addition, a part of the leveling device 27 is prevented from entering the agricultural field and roughening the agricultural scene.

  In addition, since the bent portion straddling the center float 55 is formed at the center in the left-right direction of the reinforcing frame 82, the vertical rotation range of the center float 55 due to the unevenness of the field is not regulated, so that the center float 55 is accurately It rotates according to the unevenness | corrugation of a farm field, while the seedling planting depth of the seedling planting part 4 is stabilized, and the leveling property of the leveling apparatus 27 improves.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, when the leveling device 27 is moved to the non-working position, the rake 83 comes into contact with the field scene. By leveling, when the leveling device 27 that is driven and rotated is brought into contact, the field scene collapses and the soil scene can be leveled even in soil fields where mud tends to float, so that the planting depth of the seedling is stabilized, Since mud does not float up, it becomes easy to grasp the planting state of the seedling, and deviation of the seedling planting position is less likely to occur. Further, when the leveling device 27 is moved to the work position, the rake 83 is separated from the farm scene, so that the farm scene can be prevented from being excessively leveled. Visibility is ensured.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the rake 83 and the planting depth frame 85 are coupled by the coupling rod 86, and seedling planting is performed. By changing the posture of the rake 83 in accordance with the raising and lowering of the section 4, the bottom surfaces of the rake 83, the center float 55, and the left and right side floats 56 can be kept horizontal, and unevenness is produced in the leveled field scene. This prevents the planting depth of the seedling from being stabilized.

  According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect of the invention, by selecting the mounting hole 87a of the mounting stay 87 for mounting the connecting rod 86, it is possible to cope with the amount of lifting of the seedling planting portion 4. Since the amount of rotation of the rake 83 is changed, the amount of rotation of the rake 83 can be changed in accordance with the amount of soil in the field and the amount of foreign matter (swarf etc.). The planting depth of the seedlings can be easily aligned, and impurities are not easily accumulated in the rake 83, and the leveling property is maintained.

It is a side view of the riding type seedling transplanter of the Example of this invention. It is a top view of the riding type seedling transplanter of FIG. It is a principal part side view of the rotor support structure of the riding type seedling transplanter of FIG. It is a principal part top view of the seedling planting part of the riding type seedling transplanting machine of FIG. It is a principal part top view of the seedling planting part of the riding type seedling transplanting machine of FIG. It is a perspective view of the attachment structure of the rake | rake of the riding type seedling transplanter of FIG. It is a side view of the attachment structure of the rotor, planting transmission frame, and rake of the riding type seedling transplanter of FIG. It is a side view in case the rotor of the leveling vertical movement apparatus part of the riding type seedling transplanter of FIG. 1 exists in an action position. It is a side view in case the rotor of the leveling vertical movement apparatus part of the riding type seedling transplanter of FIG. 1 exists in a non-operation position. It is a perspective view of the attachment part to the rotor support frame of the rake of the riding type seedling transplanter of FIG. It is a control block diagram of the riding type seedling transplanter of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

  FIG. 1 and FIG. 2 are a side view and a plan view of a riding seedling transplanter which is an embodiment using the present invention. The riding seedling transplanter 1 has a seedling planting portion 4 mounted on the rear side of a traveling vehicle body 2 via a lifting link 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 a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached.

Further, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via a lifting link device 3, and a main body portion of the fertilizer application device 5 is provided on the upper rear portion of the traveling vehicle body 2.
Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel rolling shaft (not shown) provided horizontally in the front and rear at the center of the rear end of the main frame 15 is used as a fulcrum. The rear wheel gear cases 18 and 18 are supported in a freely rolling manner, and the rear wheels 11 and 11 are attached to a rear wheel axle 11a that protrudes outward 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 hydrostatic continuously variable transmission (HST) 23 and the like. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then 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 the seedling planting unit 4 by a planting clutch (not shown) and a planting transmission shaft provided at the rear part of the traveling vehicle body 2.

  A seat 31 is installed at the top of the engine 20. A front cover 32 incorporating 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 left and right sides of the lower end of the front cover 32 are horizontal floor steps 35. The floor step 35 is provided with a number of holes (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls to the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  In addition, on the left and right sides of the front part of the traveling vehicle body 2, a spare seedling stage 38 on which supplementary seedlings are placed may be provided. The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing.

And the connecting shaft 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 to the said centering shaft 44 so that rolling is possible.
An elevating hydraulic cylinder 46 is provided between a support member 42 fixed to the main frame 15 and a tip of a swing arm (not shown) formed integrally with the upper link 40, and the cylinder 46 is expanded and contracted hydraulically. As a result, 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 seedling planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlets 51a,. In addition, when all the seedlings for one horizontal row are supplied to the seedling outlet 51a, ..., the seedling stage 51 for transferring the seedling downward by the seedling feeding belt 54, ..., the seedling supplied to the seedling outlet 51a, ... is planted in the field. A seedling planting device 52,..., And a pair of left and right drawing markers (not shown) 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 these floats 55, 56, 56 are grounded on the mud surface of the field, the aircraft moves forward, and the floats 55, 56, 56 slide while leveling the mud surface. Seedlings are planted by. Each of the floats 55, 56, and 56 is rotatably attached so that the front end side thereof moves up and down according to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is a float inclination angle sensor during planting work. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4. To do.

  A rotor 27 (27a, 27b), which is an example of a leveling device, is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller (not shown) of a rectangular support frame 65 that is full in the left-right direction and the up-down direction that supports the entire seedling planting unit 4 as a rail.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... Guided to a guide (not shown),... Is dropped into a fertilization groove formed in the vicinity of the side portion of the seedling-growing strip by a grooved body 64,. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hoses 62,... Via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hoses 62,. It is designed to be transported.

A drawing arm 67 is provided on both sides of the aircraft.
FIG. 3 is a side view of a main part of the rotor support structure. The rotor support structure is provided with a lifting arm 81 whose upper end is rotatably supported by the support frame 65 of the seedling stage 51. The lower end of the lifting arm 81 is rotatably supported by a second leveling rotation arm 75b described later via a connecting member 71.

  The rotor suspension arm 81 is provided on the support frame 65 and has a lower end attached to the second rotating arm 75b on the left side of the machine body. Thereby, when the gear 80 moves, the rotor suspension arm 81 moves up and down.

  The suspension spring 78 of the center rotor 27 b is provided between a stay provided on the front side of the left rotor transmission case 73 and a stay provided on the top of the rotor suspension arm 81. There are a plurality of stays on the suspension arm 81 side, which are selected and attached.

The vertical link 43 is provided on the inner side of the machine body than the gate-type support frame 65.
The vertical movement actuator 79 that moves the rotor suspension arm 81 up and down is operated when the seedling planting unit 4 is moved up and down, or when the seedling planting unit 4 is automatically turned up or reverse, and the seedling planting unit 4 is moved up and down. The vertical position of the leveling rotor 27 is automatically changed according to the movement. Further, during planting work (straight traveling), when a dial or the like provided in the control unit is operated, the vertical movement actuator 79 is activated and the leveling rotor 27 can be set to an arbitrary height.

  When turning or moving backward, the aircraft moves with the leveling rotor 27 approaching the field scene, and the leveling rotor 27 may cause the field scene to be damaged. Actuator 79 operates and raises rotor suspension arm 81. Then, the left side rotor 27a is lifted, the right side rotor 27a is lifted around the leveling support frame 76, and the center rotor 27b is lifted via the left and right rotor transmission cases 73, 73. At this time, if the center rotor 27b is raised too much, the lower link arm 41 is distorted. Therefore, a contact roller (not shown) provided in the vicinity of the mounting stay of the spring 78 contacts the link arm 41, and the center rotor 27b becomes the side rotor. The posture is positioned below 27a.

On the other hand, when the leveling rotor 27 is lowered, the leveling rotor 27 is lowered in accordance with the lowering stage of the seedling planting unit 4, and at the latest the seedling planting unit 4 is lowered to the working height and the seedling planting is started at the stage where seedling planting is started. Lower 27 so that it begins to level the field. (Transmission to the leveling rotor 27 is performed via the transmission shaft 72, but when the seedling planting part 4 is raised to a height non-working height (about 30 cm), the transmission is cut off, and when lowered, the transmission is connected. )
That is, as in the conventional configuration, the leveling rotor 27 also moves up and down as the seedling planting unit 4 moves up and down. However, in the conventional configuration, when the seedling planting unit 4 is raised or lowered to a predetermined height by a mechanical configuration, the leveling rotor When the seedling planting part 4 is raised or lowered to a predetermined height, the control device 100 operates the vertical movement actuator 79 to raise / lower the leveling rotor 27. It has a configuration.

  Further, as shown in the plan view of the main part of the seedling planting portion 4 in FIG. 4, a full leveling support frame 76 is provided in the traveling vehicle lateral width direction to support the rotor 27 (27a, 27b). Further, leveling rotation arms 75a and 75a for rotatably supporting the side rotors 27a and 27a are provided at both ends of the leveling support frame 76, respectively.

  The leveling rotation arm 75 is provided between the left and right first leveling rotation arms 75a that connect the left and right sides of the leveling rotor 27 and the leveling support frame 76, and the left and right first leveling rotation arms 75a. 27 (center rotor 27b, side rotor 27a) and left and right second leveling rotation arms 75b that connect the leveling support frame 76, and the left and right second leveling rotation arms 75b move the rotor 27b up and down. A device 77 is provided.

  Further, the power to the drive shaft 70a that rotationally drives the side rotor 27a is transmitted from the gear in the gear case 18 of each rear wheel 11 via the transmission shaft 72 for driving the rotor (FIGS. 1 and 4). The The output shaft 72 is provided toward the rear side of the machine body, the transmission shaft 72 is provided on the drive shaft 70a toward the front side of the machine body, and a driving force is transmitted from the transmission shaft 72 to the left and right side rotors 27a, 27a via the drive shaft 70a. And the transmission to the drive shaft 70b of the center rotor 27b.

  4 and 3, since the leveling support frame 76 supports the leveling rotor 27 (center rotor 27b, side rotor 27a) from the rear, the leveling rotor 27 (center rotor 27b, side rotor 27a) is in the field. Therefore, the leveling rotor 27 (center rotor 27b, side rotor 27a) can be prevented from being lifted against resistance and the unevenness of the field scene can be leveled without fail.

  Further, by supporting the leveling rotor 27 (center rotor 27b, side rotor 27a) with a single leveling support frame 76, the seedling planting unit 4 is lifted so that the leveling rotor 27 does not come into contact with the farm scene. Since the rotor 27 (center rotor 27b, side rotor 27a) can be prevented from sagging due to its own weight, the leveling rotor 27 (center rotor 27b, side rotor 27a) sagging during turning of the traveling vehicle body 2 or during non-planting work can be used in the field. It can be prevented from being damaged by touching the paddy field and roughening the field scene, and the seedling planting accuracy can be improved as compared with the conventional method.

  4, the leveling rotation arm 75 connects the center rotor 27b, the left and right side rotors 27a, 27a, and the left and right side portions of the leveling support frame 76. The left and right first leveling rotation arms 75a and the left and right first leveling rotation arms 75a are provided between the left and right first leveling rotation arms 75a and connect the rotor 27 and the leveling support frame 76 to the left and right second leveling rotation arms 75b. The second leveling rotation arm 75b is provided with a leveling vertical movement device 77 for moving the center rotor 27b and the left and right side rotors 27a, 27a up and down.

  As described above, the center rotor 27b, the left and right side rotors 27a, 27a, and the leveling support frame 76 are provided between the left and right first leveling rotation arms 75a provided on the left and right sides, and the left and right first leveling rotation arms 75a. Since the center rotor 27b and the left and right side rotors 27a, 27a are supported at a plurality of locations in the left and right direction by being connected by the left and right second leveling rotation arms 75b provided, the center rotor 27b and the left and right side rotors are supported by ground resistance. 27a and 27a are prevented from being lifted, and the leveling ability and seedling planting accuracy are improved as compared with the conventional technique. Further, by providing the leveling vertical movement device 77 on the second leveling rotation arm 75b, the center rotor 27b and the left and right side rotors 27a, 27a can be moved up and down at a position closer to the center of the traveling vehicle body 2. When the rotor 27b and the left and right side rotors 27a and 27a are moved up and down as a whole, the center rotor 27b and the left and right side rotors 27a and 27a are not fully lifted and contact with the field scene and are damaged. Is prevented.

  FIG. 8 is a side view of the main part of the seedling planting section 4 when the leveling device 77 is attached to the seedling planting section support frame 65 and the center rotor 27b and the left and right side rotors 27a, 27a are on the field scene. 9 is a side view of the main part of the seedling planting portion 4 when the center rotor 27b and the left and right side rotors 27a, 27a of FIG. 8 are raised from the field scene, and the sector gear 80 and the second leveling rotation arm 75b. Are connected by a lifting arm 81.

  By connecting the leveling vertical movement device 77 and the second leveling rotation arm 75b with the lifting arm 81, the working height of the center rotor 27b and the left and right side rotors 27a, 27a can be adjusted in accordance with the lifting operation of the leveling vertical movement device 77. Since it can be changed, the leveling of the field scene and the planting accuracy of the seedlings are improved.

  Further, in this way, the center rotor 27b and the left and right side rotors 27a, 27a can be sufficiently separated from the field scene during non-leveling work, so that the field scene is roughened, and the center rotor 27b and the left and right side rotors 27a, 27a, It is prevented that 27a is damaged by contact with a field scene.

  On the other hand, as shown in the plan view of FIG. 5, the left and right side rotors 27a are connected to the center rotor 27b by left and right rotor transmission cases 73, and the side floats 56 are respectively provided behind the left and right side rotors 27a. A center float 55 for detecting the depth of the field is disposed between the left and right side floats 56 and the left and right seedling planting transmission cases 50 and behind the center rotor 27b. Left and right third leveling rotary arms 75c projecting forward from 75a are respectively provided toward the front side of the traveling vehicle body 2, and the left and right third leveling rotary arms 75c are connected by a reinforcing frame 82. A bent portion is formed at the center in the direction so as to straddle the upper side of the center float 55 and has a convex shape in plan view.

  Thus, by connecting the front side of the center rotor 27b and the left and right side rotors 27a, 27a with the reinforcing frame 82, the connection between the constituent members of the center rotor 27b and the left and right side rotors 27a, 27a can be strengthened. Therefore, the center rotor 27b and the left and right side rotors 27a, 27a are prevented from being damaged by contact resistance with the field scene, and the center rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position. Since the center rotor 27b and the left and right side rotors 27a, 27a as a whole are lifted together, a bent portion straddling the center rotor 27b and the center float 55 is formed. Is not regulated, so the center float 5 is rotated exactly match the field of irregularities, the seedling planting depth of the seedling planting unit 4 is stabilized, the center rotor 27b and the left and right side rotor 27a, the ground leveling of 27a improves.

A float floating prevention arm 92 may be provided on the rear side of the center float 55 and the side float 56.
As shown in the perspective view of FIG. 6 and the side view of FIG. 7, the upper end of the rake 83 for leveling the farm scene is fixedly attached to the leveling support frame 76 via the attachment piece 83 a fixed to the rake 83. When the rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position, the rake 83 is grounded, and when the center rotor 27b and the left and right side rotors 27a, 27a are moved to the working position, the rake 83 is separated from the field scene. The rake 83 is attached to the leveling support frame 76 as described above.

  When the center rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position, the rake 83 comes into contact with the ground to level the field, thereby bringing the center rotor 27b to rotate and the left and right side rotors 27a, 27a into contact with each other. Since the farm scene can be crushed and the soil can be leveled even in the soil where the mud floats easily, the planting depth of the seedling is stabilized and the mud does not float up. This makes it easier for the seedling planting position to shift.

  Further, when the center rotor 27b and the left and right side rotors 27a, 27a are moved to the working position, the rake 83 is separated from the farm scene, so that the farm scene can be prevented from being excessively leveled. It is prevented from floating and work visibility is ensured.

  Further, as shown in the side view of FIG. 7, a planting depth frame 85 (with a transmission shaft in the planting depth frame 85) that is long in the left-right direction connecting the center float 55 and the left and right side floats 56. The rake 83 is attached to the seedling planting transmission case 50, the rake 83 and the planting depth frame 85 are coupled by a connecting rod 86, and the rake 83 is rotated up and down as the seedling planting unit 4 is raised and lowered. In this way, the rake 83 and the planting depth frame 85 are coupled by the coupling rod 86, and the posture of the rake 83 is changed in accordance with the raising and lowering of the seedling planting unit 4, whereby the rake 83, the center float 55, and the left and right side floats are changed. Since the bottom face of 56 can be kept horizontal, it is possible to prevent unevenness in the leveled field scene and to stabilize the seedling planting depth.

  As shown in the side view of FIG. 7, a plurality of attachment holes 87a are formed in an attachment stay 87 for attaching the connection rod 86 to the planting depth frame 85, and the connection rod 86 is inserted into any of the plurality of attachment holes 87a. By attaching one end of the rake 83, the amount of rotation of the rake 83 corresponding to the amount of raising and lowering of the seedling planting part 4 can be changed.

  By selecting the mounting hole 87a of the mounting stay 87 for mounting the connecting rod 86, the amount of rotation of the rake 83 corresponding to the lifting / lowering amount of the seedling planting part 4 is changed, so that the soil quality and foreign matters (dust etc.) of the field are changed. Since the amount of rotation of the rake 83 can be changed in accordance with the amount, the unevenness of the farm scene is leveled and the planting depth of the seedlings is easily aligned, and impurities are less likely to collect on the rake 83, and leveling is maintained. The

  As shown in FIG. 8 and FIG. 9, a lifting arm 81 whose upper end is rotatably connected to the sector gear 80 by rotating the sector gear 80 by the operation of the rotor vertical motion motor 79 of the leveling device 77. The second leveling rotation arm 75b, which is pivotably connected to the lower end of the lifting arm 81, moves upward, and the center rotor 27b and the left and right side rotors 27a, 27a move upward along with this movement. Can be raised.

  When the seedling planting part 4 is raised, the fan-shaped gear 80 is rotated by the operation of the rotor vertical movement motor 79, and the rotor suspension arm 81 connected to the fan-shaped gear 80 rotates the second leveling rotary arm 75b upward. Then, by rotating the first leveling rotation arm 75a upward via the leveling support arm 76, the left and right side rotors 27a, 27a rise, and the center rotor 27b via the left and right rotor transmission cases 73, 73 rises. Pivots upward.

  As shown in FIG. 11, a seedling planting part raising / lowering switch 91 for raising and lowering the seedling planting part 4 is provided in the vicinity of the control seat 31, for example, the grip part of the traveling lever 93 that operates the output of the hydrostatic continuously variable transmission 23. When the planting part raising / lowering switch 91 is operated, the rotor vertical movement motor 79 is operated, and if it is an ascending operation, the rotor suspension arm 81 is raised and the first and second leveling rotary arms 75a, 75b are provided. Is turned up to raise the leveling rotor 27, and in the case of a lowering operation, the rotor suspension arm 81 is lowered and the first and second leveling turning arms 75a and 75b are turned downward to lower the leveling rotor 27. A configuration may be adopted.

With the above-described configuration, the turning interlocking mechanism that raises and lowers the seedling planting unit 4 in conjunction with the turning traveling and the reverse interlocking mechanism that automatically raises the seedling planting unit 4 during reverse travel are not activated, and the operator When the lifting operation of the planting unit 4 and the on / off operation of the seedling planting device 52 are performed manually, it is not necessary to perform the lifting operation of the leveling rotor 27, and the amount of work required for the manual operation of the operator is reduced. Improves.
As mentioned above, in a modified farm, depending on the location, if turning interlocked, the planting accuracy deteriorates, so an operator may work manually.

  Alternatively, when the lever potentiometer 95 that detects the amount of operation of the travel lever 93 is operated in the reverse direction, that is, when the reference position is 0 degree, the angle becomes a negative angle, the reverse hydraulic cylinder 46 is operated as a reverse operation, and The rotor vertical movement motor 79 may be actuated prior to the detection of the lift link switch 92 to raise the rotor suspension arm 81 and raise the leveling rotor 27.

  With the above-described configuration, the seedling planting unit 4 starts to rise and the leveling rotor 27 starts to rise at the same time when moving backward, so that the leveling rotor 27 is prevented from touching the field scene and roughening the field scene. The planting depth is stabilized when resuming, and the leveling rotor 27 is prevented from crushing the planted seedling, so that seedling replanting becomes unnecessary and the consumption of seedling can be reduced.

  Further, in the so-called don't mushroom operation in which seedlings are planted until the front end portion of the machine body is located at the farm field end, and the vehicle moves backward after a predetermined distance, the farm field end where the seedling is finally planted, the so-called headland is placed on the leveling rotor 27. Therefore, it is possible to prevent unevenness of the field scene from being leveled by the leveling rotor 27 during the headland work, thereby preventing the planting depth of the seedling from being disturbed.

  Alternatively, a handle potentiometer 96 for detecting the steering of the handle 34 is provided, and when the steering potentiometer 96 detects a steering angle (eg, 30 to 45 degrees) that can be regarded as turning, the lift hydraulic cylinder 46 is operated and is regarded as turning. The lift hydraulic cylinder 46 may be operated, and the rotor vertical movement motor 79 may be operated prior to detection of the lift link switch 92 to raise the rotor suspension arm 81 and raise the leveling rotor 27.

  With the above configuration, the leveling rotor 27 starts to rise at the same time as the seedling planting unit 4 starts to rise during turning, so that the leveling rotor 27 is prevented from touching the field scene and roughening the field scene, so that the seedling can be planted. The planting depth is stabilized when resuming, and the leveling rotor 27 is prevented from crushing the planted seedling, so that seedling replanting becomes unnecessary and the consumption of seedling can be reduced.

  Further, the center rotor 27b and the left and right side rotors 27a and 27a may be adjusted to a set height by a rotor height adjustment dial provided on a meter panel (not shown) provided in the vicinity of the control seat 31.

  When the rotor height is manually set, the center rotor 27b and the left and right side rotors 27a, 27a are moved during the next seedling planting operation while the center rotor 27b and the left and right side rotors 27a, 27a are moved to the storage position. Although it cannot be used, such a problem can be prevented by automatically adjusting the center rotor 27b and the left and right side rotors 27a, 27a to the set height.

  As shown in the side view of the seedling planting part 4 in FIG. 3, the rotor vertical movement motor 79 is attached to the lifting arm 81, and when the seedling planting part 4 is lifted, the center rotor 27b and the left and right side rotors 27a, 27a are The center rotor 27b and the left and right side rotors 27a, 27a may be raised when the seedling planting portion 4 is lowered. As a result, the center rotor 27b and the left and right side rotors 27a, 27a can be lowered during coasting turning, and only the turning trace can be leveled. In this case, when the lifting link switch 92 that is turned on when the upper link 40 of the seedling planting unit 4 is rotated more than a predetermined height is actuated, the control device 100 controls the drive of the rotor lifting motor 79. In such a configuration, the rotor vertical movement motor 79 can be automatically operated, so that the operability is improved as compared with the prior art.

  Further, as shown in FIG. 3, a spring 78 is provided between the outside of the rotor transmission case 73 near the leveling rotor 27b and the lifting arm 81 to support the center rotor 27b and the left and right side rotors 27a and 27a. Yes. Further, as shown in FIG. 1, a rotor cover 37 is provided above and behind the center rotor 27 b and the left and right side rotors 27 a and 27 a so that mud is not applied to the floats 55 and 56.

  Since the aluminum frame 89 (FIGS. 4 and 3) is fixed to the tip of the seedling planting part transmission case 50, the leveling rotor 27, the seedling planting device 52, etc. can be attached to and detached from the support frame 65 as a unit. The time and labor required for attaching and detaching during maintenance work are reduced.

  As described above, the center rotor 27b and the left and right side rotors 27a and 27a are normally lifted by operating the rotor lifting / lowering motor 63. In this embodiment, the seedling planting device 52 is provided with an engine. When a saddle clutch (not shown) for transmitting the power of 20 is disengaged by operating the saddle clutch lever 14 (FIG. 2), the rotor lifting / lowering motor 63 is actuated and automatically the center rotor 27b and the left and right side The rotor 27a, 27a is moved down to perform leveling work.

For this purpose, a saddle clutch lever sensor (not shown) for detecting whether the saddle clutch lever 14 (FIG. 2) is on or off is provided.
Therefore, when the heel clutch is disengaged by operating the heel clutch lever 14 in order to adjust the number of planting strips in the headland and the vicinity thereof, the heel clutch lever sensor (not shown) moves the heel clutch lever 14 (FIG. 2). ) Is detected, and the center rotor 27b and the left and right side rotors 27a, 27a are automatically lowered by a control device (not shown) to perform leveling work.

Thereby, it is possible to reliably level the headland or the vicinity of the headland which is likely to be rough in the field.
Although the tip of the rake 83 is fixed to the leveling support frame 76, as shown in the side view of the rotor portion in FIG. 10, when the rotor is raised to the storage position, the leveling support frame 76 rotates in the first leveling. Since the arm 75a moves upward, the rear end of the rake 83 jumps up. Thus, when the rotor is stored, the rake 83 cannot level the farm scene.

  In this way, the rake 83 does not roughen the field scene by not leveling the field scene more than necessary.

DESCRIPTION OF SYMBOLS 1 Riding type seedling transplanter with fertilizer device 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 10 Front wheel 11 Rear wheel 11a Rear wheel drive shaft 12 Mission case 13 Front wheel final case 14 畦 Clutch lever 15 Main frame 18 Rear wheel gear case 18a Transmission shaft 20 Engine 23 Hydrostatic continuously variable transmission (HST)
27 (27a, 27b) Leveling rotor 31 Seat 32 Front cover 34 Handle 35 Floor step 36 Rear step 37 Rotor cover 38 Spare seedling stage 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 46 Elevating hydraulic cylinder
50 Seedling planting transmission case 51 Seedling stand 51a Seedling outlet 52 Seedling planting device 53 Blower electric motor 54 Seedling feed belt 55 Center float 56 Side float 58 Blower 59 Air chamber 60 Fertilizer hopper 61 Feeding section 62 Fertilizer hose 64 Groove body 65 Seedling planting support frame 67 Drawing marker 70 (70a, 70b) Rotor drive shaft 71 Connecting member 72 Leveling transmission shaft 73 Rotor transmission case 75 Leveling rotation arm 76 Leveling support frame 77 Leveling vertical movement device 78 Spring 79 Rotor vertical motion motor 80 Fan gear 81 Rotor vertical motion arm 82 Reinforcement frame 83 Rake 85 Planting depth frame 86 Connecting rod 87 Mounting stay 89 Aluminum foil 90 Rotor drive rod 91 Seedling planting lifting switch 92 Lifting link switch 93 Traveling lever 95 Lever Potentiometer 96 Handle Potentiometer 100 Control Device

  The present invention relates to a seedling transplanter with a ground work device.

  In a seedling transplanter equipped with a seedling planting apparatus with a float, a configuration is known that includes a rotor for leveling the field just before seedling planting by the seedling planting apparatus.

JP 2012-179014 A

  The seedling transplanter shown in Patent Document 1 is provided with a center for leveling the seedling planting position and left and right leveling rotors. By leveling the unevenness of the field with the leveling rotor, the seedling planting depth is set. To stabilize.

  However, the leveling rotor of the seedling transplanter of Patent Document 1 supports the left and right rotors with a rotor suspension frame provided in the seedling planting part, and the center rotor is supported by the left and right rotors via the left and right rotor transmission cases. Therefore, there is a problem that the connection between the rotors is weak and the rotor is easily damaged in a situation where the rotor is deeply submerged and overloaded.

  In particular, although the central rotor is connected by a suspension spring provided in the seedling planting part, when the seedling planting part is lifted and moved to a non-working position, the central rotor (leveling device) moves downward. It may hang down and come into contact with the farm scene. If the center rotor is in contact with the field scene when the seedling transplanter is turning, the dragged center rotor will be damaged, and the center rotor will ruin the field scene. When seedlings are planted on the ground, there are large irregularities and the seedling planting depth becomes too shallow or too deep.

  The subject of this invention is providing the seedling transplanter provided with the turning rotor for ground work which can support reliably the leveling apparatus which tends to become unstable including the time of turning.

The above-mentioned problem of the present invention is solved by the following means.
First aspect of the present invention, provided the run line vehicle seedling planting unit for lifting via the lifting link mechanism (3) to the rear of (2) (4), ground leveling device to smooth the 圃 scene (27) in seedling transplanter, the leveling device (27) integer locations supporting frame you support (76) provided, leveling device to the fuselage front (27) provided than the leveling support frame (76), 該整 land device ( 27) and left and right first leveling rotation arms (75a) for connecting the left and right sides of the leveling support frame (76) are provided, and a second leveling rotation is provided between the left and right of the left and right first leveling rotation arms (75a). The seedling transplanting machine is characterized in that an arm (75b) is provided, and a leveling vertical movement device (77) for raising and lowering the leveling device (27) is provided on the second leveling rotation arm (75b) .

According to a second aspect of the invention, the ground leveling vertical movement device (77), the seedling planting unit constituted by vertically moving actuator disposed (4) (79) and sector gear (80), said sector gear (80 ) it was ligated with the second ground leveling rotating arm (75b) of the lifting arm (81) is a seedling transplantation machine according to claim 1, characterized in.

According to a third aspect of the invention, the ground leveling device (27) includes left and right direction of the center provided at the center rotor of the vehicle body (2) (27b), left and right sides at and body rear of the center rotor (27b) leveling the left and right side rotor (27a) provided, with the center rotor (27b) lateral side rotor to (27a) constituted by left and right rotor transmission case connecting (73), and left and right side rotor (27a) to The left and right outer sides of the support frame (76) are connected by the left and right first leveling rotary arms (75a), and the left and right side rotors (27a) and the leveling support frame (76) are connected by a second leveling rotary arm ( The seedling transplanter according to claim 1 or 2, wherein 75b) is provided .

The invention according to claim 4 is provided with a plurality of planting transmission cases (50) for supplying planting driving force to the seedling planting unit (4), and each side float is provided behind the left and right side rotors (27a). (56) arranged to place the center float (55) for detecting a field in height behind the and center the rotor in the left and right side float (56) (27b), said left and right first leveling pivot arm each left and right of the third ground leveling pivoting arm projecting forward (75c) to (75a) provided towards the front, connected the left and right third leveling pivot arm (75c) with a reinforcing frame (82), said a seedling transplantation machine according to claim 2 or 3, characterized in that the lateral center portion wherein the formation of the ingredients flexion curved portion extending over the upper center float (55) to the reinforcing frame (82).

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  According to the first aspect of the present invention, the leveling support frame (76) supports the leveling device (27) from the rear, whereby the leveling support frame (76) receives the resistance that the leveling device (27) receives from the field scene. As a result, it is possible to prevent the leveling device (27) from rising due to resistance, and to ensure that the unevenness of the field scene is leveled.

In addition, by supporting the leveling device (27) with one leveling support frame (76), when the seedling planting part (4) is raised and the leveling device (27) does not come into contact with the field scene, the leveling is performed. Since the device (27) can be prevented from sagging due to its own weight, the leveling device (27) suspended during turning of the traveling vehicle body (2) or during non-planting work may come into contact with the field scene and be damaged, or the field scene may be damaged. And the seedling planting accuracy is improved as compared with the prior art.
The leveling device (27) and the leveling support frame (76) are provided between the left and right first leveling rotation arms (75a) provided on the left and right sides and the left and right first leveling rotation arms (75a). Since the leveling device (27) is supported at a plurality of positions in the left-right direction by being connected by the second leveling rotation arm (75b), it is prevented that the leveling device (27) is lifted by the grounding resistance and is not leveled. In addition, leveling performance and seedling planting accuracy will be improved compared to conventional methods.
Further, the leveling device (77) is provided on the second leveling rotation arm (75b), and the leveling device (27) is moved up and down at a position closer to the center of the traveling vehicle body (2), so that the leveling device (27) is moved up and down. Since the whole can be moved up and down substantially uniformly when moving up and down, a part of the leveling device (27) does not fully rise and is prevented from being damaged by contact with a farm scene.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the leveling vertical movement device (77) and the second leveling rotation arm (75b) are connected by the lifting arm (81). Since the working height of the leveling device (27) can be changed according to the raising / lowering operation of the leveling vertical movement device (77), the leveling of the field scene and the seedling planting accuracy are improved.

In addition, since the leveling device (27) can be separated from the field scene during non-leveling work, the field scene is prevented from being roughened and the leveling device (27) from being damaged by contact with the field scene.

According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, the center rotor (27b) and the left and right side rotors (27a) are supported at a plurality of positions in the left-right direction. The center rotor (27b) and the left and right side rotors (27a) are prevented from being lifted, and the leveling ability and seedling planting accuracy are improved as compared with the prior art.

According to the invention of claim 4, in addition to the effect of the invention of claim 2 or 3, the front side of the leveling device (27) is connected by the reinforcing frame (82), so that the leveling device (27) Since the connection between the constituent members can be strengthened, the leveling device (27) is prevented from being damaged by the contact resistance with the field scene, and the leveling device (27) is moved to the non-working position. since leveling device (27) whole is lifted together, part of the soil preparation device (27) enters the field, is prevented from roughening the field surface.

  In addition, since the bent portion straddling the center float (55) is formed at the center in the left-right direction of the reinforcing frame (82), the vertical rotation range of the center float (55) due to the unevenness of the field is not restricted. The center float (55) accurately rotates according to the unevenness of the field, so that the seedling planting depth of the seedling planting section (4) is stabilized and the leveling performance of the leveling device (27) is improved.

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It is a side view of the riding type seedling transplanter of the Example of this invention. It is a top view of the riding type seedling transplanter of FIG. It is a principal part side view of the rotor support structure of the riding type seedling transplanter of FIG. It is a principal part top view of the seedling planting part of the riding type seedling transplanting machine of FIG. It is a principal part top view of the seedling planting part of the riding type seedling transplanting machine of FIG. It is a perspective view of the attachment structure of the rake | rake of the riding type seedling transplanter of FIG. It is a side view of the attachment structure of the rotor, planting transmission frame, and rake of the riding type seedling transplanter of FIG. It is a side view in case the rotor of the leveling vertical movement apparatus part of the riding type seedling transplanter of FIG. 1 exists in an action position. It is a side view in case the rotor of the leveling vertical movement apparatus part of the riding type seedling transplanter of FIG. 1 exists in a non-operation position. It is a perspective view of the attachment part to the rotor support frame of the rake of the riding type seedling transplanter of FIG. It is a control block diagram of the riding type seedling transplanter of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

  FIG. 1 and FIG. 2 are a side view and a plan view of a riding seedling transplanter which is an embodiment using the present invention. The riding seedling transplanter 1 has a seedling planting portion 4 mounted on the rear side of a traveling vehicle body 2 via a lifting link 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 a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13, 13 are provided on the left and right sides of the case 12, and the left and right front wheels are mounted on the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13. 10 and 10 are respectively attached.

Further, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 so as to be movable up and down via a lifting link device 3, and a main body portion of the fertilizer application device 5 is provided on the upper rear portion of the traveling vehicle body 2.
Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel rolling shaft (not shown) provided horizontally in the front and rear at the center of the rear end of the main frame 15 is used as a fulcrum. The rear wheel gear cases 18 and 18 are supported in a freely rolling manner, and the rear wheels 11 and 11 are attached to a rear wheel axle 11a that protrudes outward 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 hydrostatic continuously variable transmission (HST) 23 and the like. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then 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 the seedling planting unit 4 by a planting clutch (not shown) and a planting transmission shaft provided at the rear part of the traveling vehicle body 2.

  A seat 31 is installed at the top of the engine 20. A front cover 32 incorporating 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 left and right sides of the lower end of the front cover 32 are horizontal floor steps 35. The floor step 35 is provided with a number of holes (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls to the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  In addition, on the left and right sides of the front part of the traveling vehicle body 2, a spare seedling stage 38 on which supplementary seedlings are placed may be provided. The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing.

And the connecting shaft 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 to the said centering shaft 44 so that rolling is possible.
An elevating hydraulic cylinder 46 is provided between a support member 42 fixed to the main frame 15 and a tip of a swing arm (not shown) formed integrally with the upper link 40, and the cylinder 46 is expanded and contracted hydraulically. As a result, 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 seedling planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlets 51a,. In addition, when all the seedlings for one horizontal row are supplied to the seedling outlet 51a, ..., the seedling stage 51 for transferring the seedling downward by the seedling feeding belt 54, ..., the seedling supplied to the seedling outlet 51a, ... is planted in the field. A seedling planting device 52,..., And a pair of left and right drawing markers (not shown) 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 these floats 55, 56, 56 are grounded on the mud surface of the field, the aircraft moves forward, and the floats 55, 56, 56 slide while leveling the mud surface. Seedlings are planted by. Each of the floats 55, 56, and 56 is rotatably attached so that the front end side thereof moves up and down according to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is a float inclination angle sensor during planting work. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4. To do.

  A rotor 27 (27a, 27b), which is an example of a leveling device, is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller (not shown) of a rectangular support frame 65 that is full in the left-right direction and the up-down direction that supports the entire seedling planting unit 4 as a rail.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... Guided to a guide (not shown),... Is dropped into a fertilization groove formed in the vicinity of the side portion of the seedling-growing strip by a grooved body 64,. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hoses 62,... Via the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hoses 62,. It is designed to be transported.

A drawing arm 67 is provided on both sides of the aircraft.
FIG. 3 is a side view of a main part of the rotor support structure. The rotor support structure is provided with a lifting arm 81 whose upper end is rotatably supported by the support frame 65 of the seedling stage 51. The lower end of the lifting arm 81 is rotatably supported by a second leveling rotation arm 75b described later via a connecting member 71.

  The rotor suspension arm 81 is provided on the support frame 65 and has a lower end attached to the second rotating arm 75b on the left side of the machine body. Thereby, when the gear 80 moves, the rotor suspension arm 81 moves up and down.

  The suspension spring 78 of the center rotor 27 b is provided between a stay provided on the front side of the left rotor transmission case 73 and a stay provided on the top of the rotor suspension arm 81. There are a plurality of stays on the suspension arm 81 side, which are selected and attached.

The vertical link 43 is provided on the inner side of the machine body than the gate-type support frame 65.
The vertical movement actuator 79 that moves the rotor suspension arm 81 up and down is operated when the seedling planting unit 4 is moved up and down, or when the seedling planting unit 4 is automatically turned up or reverse, and the seedling planting unit 4 is moved up and down. The vertical position of the leveling rotor 27 is automatically changed according to the movement. Further, during planting work (straight traveling), when a dial or the like provided in the control unit is operated, the vertical movement actuator 79 is activated and the leveling rotor 27 can be set to an arbitrary height.

  When turning or moving backward, the aircraft moves with the leveling rotor 27 approaching the field scene, and the leveling rotor 27 may cause the field scene to be damaged. Actuator 79 operates and raises rotor suspension arm 81. Then, the left side rotor 27a is lifted, the right side rotor 27a is lifted around the leveling support frame 76, and the center rotor 27b is lifted via the left and right rotor transmission cases 73, 73. At this time, if the center rotor 27b is raised too much, the lower link arm 41 is distorted. Therefore, a contact roller (not shown) provided in the vicinity of the mounting stay of the spring 78 contacts the link arm 41, and the center rotor 27b becomes the side rotor. The posture is positioned below 27a.

On the other hand, when the leveling rotor 27 is lowered, the leveling rotor 27 is lowered in accordance with the lowering stage of the seedling planting unit 4, and at the latest the seedling planting unit 4 is lowered to the working height and the seedling planting is started at the stage where seedling planting is started. Lower 27 so that it begins to level the field. (Transmission to the leveling rotor 27 is performed via the transmission shaft 72, but when the seedling planting part 4 is raised to a height non-working height (about 30 cm), the transmission is cut off, and when lowered, the transmission is connected. )
That is, as in the conventional configuration, the leveling rotor 27 also moves up and down as the seedling planting unit 4 moves up and down. However, in the conventional configuration, when the seedling planting unit 4 is raised or lowered to a predetermined height by a mechanical configuration, the leveling rotor In the present embodiment, when the seedling planting part 4 is raised or lowered to a predetermined height, the control device 100 operates the vertical movement actuator 79 to move the leveling rotor 27. It is configured to raise / lower.

Further, as shown in the plan view of the main part of the seedling planting portion 4 in FIG. 4, a full leveling support frame 76 is provided in the traveling vehicle lateral width direction to support the rotor 27 (27a, 27b). Further, first leveling rotation arms 75a and 75a for rotatably supporting the side rotors 27a and 27a are provided at both ends of the leveling support frame 76, respectively.

The leveling rotation arm 75 is provided between the left and right first leveling rotation arms 75a that connect the left and right sides of the leveling rotor 27 and the leveling support frame 76, and the left and right first leveling rotation arms 75a. 27 (center rotor 27b, side rotor 27a) consists of a second leveling rotating arm 75b of the left and right connecting the leveling support frame 76, ground leveling for vertically moving the leveling rotor 2 7 to the right and left of the second leveling rotating arm 75b A vertical movement device 77 is provided.

  Further, the power to the drive shaft 70a that rotationally drives the side rotor 27a is transmitted from the gear in the gear case 18 of each rear wheel 11 via the transmission shaft 72 for driving the rotor (FIGS. 1 and 4). The The output shaft 72 is provided toward the rear side of the machine body, the transmission shaft 72 is provided on the drive shaft 70a toward the front side of the machine body, and a driving force is transmitted from the transmission shaft 72 to the left and right side rotors 27a, 27a via the drive shaft 70a. And the transmission to the drive shaft 70b of the center rotor 27b.

  4 and 3, since the leveling support frame 76 supports the leveling rotor 27 (center rotor 27b, side rotor 27a) from the rear, the leveling rotor 27 (center rotor 27b, side rotor 27a) is in the field. Therefore, the leveling rotor 27 (center rotor 27b, side rotor 27a) can be prevented from being lifted against resistance and the unevenness of the field scene can be leveled without fail.

  Further, by supporting the leveling rotor 27 (center rotor 27b, side rotor 27a) with a single leveling support frame 76, the seedling planting unit 4 is lifted so that the leveling rotor 27 does not come into contact with the farm scene. Since the rotor 27 (center rotor 27b, side rotor 27a) can be prevented from sagging due to its own weight, the leveling rotor 27 (center rotor 27b, side rotor 27a) sagging during turning of the traveling vehicle body 2 or during non-planting work can be used in the field. It can be prevented from being damaged by touching the paddy field and roughening the field scene, and the seedling planting accuracy can be improved as compared with the conventional method.

  4, the leveling rotation arm 75 connects the center rotor 27b, the left and right side rotors 27a, 27a, and the left and right side portions of the leveling support frame 76. The left and right first leveling rotation arms 75a and the left and right first leveling rotation arms 75a are provided between the left and right first leveling rotation arms 75a and connect the rotor 27 and the leveling support frame 76 to the left and right second leveling rotation arms 75b. The second leveling rotation arm 75b is provided with a leveling vertical movement device 77 for moving the center rotor 27b and the left and right side rotors 27a, 27a up and down.

  As described above, the center rotor 27b, the left and right side rotors 27a, 27a, and the leveling support frame 76 are provided between the left and right first leveling rotation arms 75a provided on the left and right sides, and the left and right first leveling rotation arms 75a. Since the center rotor 27b and the left and right side rotors 27a, 27a are supported at a plurality of locations in the left and right direction by being connected by the left and right second leveling rotation arms 75b provided, the center rotor 27b and the left and right side rotors are supported by ground resistance. 27a and 27a are prevented from being lifted, and the leveling ability and seedling planting accuracy are improved as compared with the conventional technique. Further, by providing the leveling vertical movement device 77 on the second leveling rotation arm 75b, the center rotor 27b and the left and right side rotors 27a, 27a can be moved up and down at a position closer to the center of the traveling vehicle body 2. When the rotor 27b and the left and right side rotors 27a and 27a are moved up and down as a whole, the center rotor 27b and the left and right side rotors 27a and 27a are not fully lifted and contact with the field scene and are damaged. Is prevented.

  FIG. 8 is a side view of the main part of the seedling planting section 4 when the leveling device 77 is attached to the seedling planting section support frame 65 and the center rotor 27b and the left and right side rotors 27a, 27a are on the field scene. 9 is a side view of the main part of the seedling planting portion 4 when the center rotor 27b and the left and right side rotors 27a, 27a of FIG. 8 are raised from the field scene, and the sector gear 80 and the second leveling rotation arm 75b. Are connected by a lifting arm 81.

  By connecting the leveling vertical movement device 77 and the second leveling rotation arm 75b with the lifting arm 81, the working height of the center rotor 27b and the left and right side rotors 27a, 27a can be adjusted in accordance with the lifting operation of the leveling vertical movement device 77. Since it can be changed, the leveling of the field scene and the planting accuracy of the seedlings are improved.

  Further, in this way, the center rotor 27b and the left and right side rotors 27a, 27a can be sufficiently separated from the field scene during non-leveling work, so that the field scene is roughened, and the center rotor 27b and the left and right side rotors 27a, 27a, It is prevented that 27a is damaged by contact with a field scene.

  On the other hand, as shown in the plan view of FIG. 5, the left and right side rotors 27a are connected to the center rotor 27b by left and right rotor transmission cases 73, and the side floats 56 are respectively provided behind the left and right side rotors 27a. A center float 55 for detecting the depth of the field is disposed between the left and right side floats 56 and the left and right seedling planting transmission cases 50 and behind the center rotor 27b. Left and right third leveling rotary arms 75c projecting forward from 75a are respectively provided toward the front side of the traveling vehicle body 2, and the left and right third leveling rotary arms 75c are connected by a reinforcing frame 82. A bent portion is formed at the center in the direction so as to straddle the upper side of the center float 55 and has a convex shape in plan view.

  Thus, by connecting the front side of the center rotor 27b and the left and right side rotors 27a, 27a with the reinforcing frame 82, the connection between the constituent members of the center rotor 27b and the left and right side rotors 27a, 27a can be strengthened. Therefore, the center rotor 27b and the left and right side rotors 27a, 27a are prevented from being damaged by contact resistance with the field scene, and the center rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position. Since the center rotor 27b and the left and right side rotors 27a, 27a as a whole are lifted together, a bent portion straddling the center rotor 27b and the center float 55 is formed. Is not regulated, so the center float 5 is rotated exactly match the field of irregularities, the seedling planting depth of the seedling planting unit 4 is stabilized, the center rotor 27b and the left and right side rotor 27a, the ground leveling of 27a improves.

A float floating prevention arm 92 may be provided on the rear side of the center float 55 and the side float 56.
As shown in the perspective view of FIG. 6 and the side view of FIG. 7, the upper end of the rake 83 for leveling the farm scene is fixedly attached to the leveling support frame 76 via the attachment piece 83 a fixed to the rake 83. When the rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position, the rake 83 is grounded, and when the center rotor 27b and the left and right side rotors 27a, 27a are moved to the working position, the rake 83 is separated from the field scene. The rake 83 is attached to the leveling support frame 76 as described above.

  When the center rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position, the rake 83 comes into contact with the ground to level the field, thereby bringing the center rotor 27b to rotate and the left and right side rotors 27a, 27a into contact with each other. Since the farm scene can be crushed and the soil can be leveled even in the soil where the mud floats easily, the planting depth of the seedling is stabilized and the mud does not float up. This makes it easier for the seedling planting position to shift.

  Further, when the center rotor 27b and the left and right side rotors 27a, 27a are moved to the working position, the rake 83 is separated from the farm scene, so that the farm scene can be prevented from being excessively leveled. It is prevented from floating and work visibility is ensured.

  Further, as shown in the side view of FIG. 7, a planting depth frame 85 (with a transmission shaft in the planting depth frame 85) that is long in the left-right direction connecting the center float 55 and the left and right side floats 56. The rake 83 is attached to the seedling planting transmission case 50, the rake 83 and the planting depth frame 85 are coupled by a connecting rod 86, and the rake 83 is rotated up and down as the seedling planting unit 4 is raised and lowered. In this way, the rake 83 and the planting depth frame 85 are coupled by the coupling rod 86, and the posture of the rake 83 is changed in accordance with the raising and lowering of the seedling planting unit 4, whereby the rake 83, the center float 55, and the left and right side floats are changed. Since the bottom face of 56 can be kept horizontal, it is possible to prevent unevenness in the leveled field scene and to stabilize the seedling planting depth.

  As shown in the side view of FIG. 7, a plurality of attachment holes 87a are formed in an attachment stay 87 for attaching the connection rod 86 to the planting depth frame 85, and the connection rod 86 is inserted into any of the plurality of attachment holes 87a. By attaching one end of the rake 83, the amount of rotation of the rake 83 corresponding to the amount of raising and lowering of the seedling planting part 4 can be changed.

  By selecting the mounting hole 87a of the mounting stay 87 for mounting the connecting rod 86, the amount of rotation of the rake 83 corresponding to the lifting / lowering amount of the seedling planting part 4 is changed, so that the soil quality and foreign matters (dust etc.) of the field are changed. Since the amount of rotation of the rake 83 can be changed in accordance with the amount, the unevenness of the farm scene is leveled and the planting depth of the seedlings is easily aligned, and impurities are less likely to collect on the rake 83, and leveling is maintained. The

  As shown in FIG. 8 and FIG. 9, a lifting arm 81 whose upper end is rotatably connected to the sector gear 80 by rotating the sector gear 80 by the operation of the rotor vertical motion motor 79 of the leveling device 77. The second leveling rotation arm 75b, which is pivotably connected to the lower end of the lifting arm 81, moves upward, and the center rotor 27b and the left and right side rotors 27a, 27a move upward along with this movement. Can be raised.

  When the seedling planting part 4 is raised, the fan-shaped gear 80 is rotated by the operation of the rotor vertical movement motor 79, and the rotor suspension arm 81 connected to the fan-shaped gear 80 rotates the second leveling rotary arm 75b upward. Then, by rotating the first leveling rotation arm 75a upward via the leveling support arm 76, the left and right side rotors 27a, 27a rise, and the center rotor 27b via the left and right rotor transmission cases 73, 73 rises. Pivots upward.

  As shown in FIG. 11, a seedling planting part raising / lowering switch 91 for raising and lowering the seedling planting part 4 is provided in the vicinity of the control seat 31, for example, the grip part of the traveling lever 93 that operates the output of the hydrostatic continuously variable transmission 23. When the planting part raising / lowering switch 91 is operated, the rotor vertical movement motor 79 is operated, and if it is an ascending operation, the rotor suspension arm 81 is raised and the first and second leveling rotary arms 75a, 75b are provided. Is turned up to raise the leveling rotor 27, and in the case of a lowering operation, the rotor suspension arm 81 is lowered and the first and second leveling turning arms 75a and 75b are turned downward to lower the leveling rotor 27. A configuration may be adopted.

With the above-described configuration, the turning interlocking mechanism that raises and lowers the seedling planting unit 4 in conjunction with the turning traveling and the reverse interlocking mechanism that automatically raises the seedling planting unit 4 during reverse travel are not activated, and the operator When the lifting operation of the planting unit 4 and the on / off operation of the seedling planting device 52 are performed manually, it is not necessary to perform the lifting operation of the leveling rotor 27, and the amount of work required for the manual operation of the operator is reduced. Improves.
As described above, in the modified farm, depending on the location, if turning interlocked, the planting accuracy is worsened, so the worker may work manually.

  Alternatively, when the lever potentiometer 95 that detects the amount of operation of the travel lever 93 is operated in the reverse direction, that is, when the reference position is 0 degree, the angle becomes a negative angle, the reverse hydraulic cylinder 46 is operated as a reverse operation, and The rotor vertical movement motor 79 may be actuated prior to the detection of the lift link switch 92 to raise the rotor suspension arm 81 and raise the leveling rotor 27.

  With the above-described configuration, the seedling planting unit 4 starts to rise and the leveling rotor 27 starts to rise at the same time when moving backward, so that the leveling rotor 27 is prevented from touching the field scene and roughening the field scene. The planting depth is stabilized when resuming, and the leveling rotor 27 is prevented from crushing the planted seedling, so that seedling replanting becomes unnecessary and the consumption of seedling can be reduced.

  Further, in the so-called don't mushroom operation in which seedlings are planted until the front end portion of the machine body is located at the farm field end, and the vehicle moves backward after a predetermined distance, the farm field end where the seedling is finally planted, the so-called headland is placed on the leveling rotor 27. Therefore, it is possible to prevent unevenness of the field scene from being leveled by the leveling rotor 27 during the headland work, thereby preventing the planting depth of the seedling from being disturbed.

  Alternatively, a handle potentiometer 96 for detecting the steering of the handle 34 is provided, and when the steering potentiometer 96 detects a steering angle (eg, 30 to 45 degrees) that can be regarded as turning, the lift hydraulic cylinder 46 is operated and is regarded as turning. The lift hydraulic cylinder 46 may be operated, and the rotor vertical movement motor 79 may be operated prior to detection of the lift link switch 92 to raise the rotor suspension arm 81 and raise the leveling rotor 27.

  With the above configuration, the leveling rotor 27 starts to rise at the same time as the seedling planting unit 4 starts to rise during turning, so that the leveling rotor 27 is prevented from touching the field scene and roughening the field scene, so that the seedling can be planted. The planting depth is stabilized when resuming, and the leveling rotor 27 is prevented from crushing the planted seedling, so that seedling replanting becomes unnecessary and the consumption of seedling can be reduced.

  Further, the center rotor 27b and the left and right side rotors 27a and 27a may be adjusted to a set height by a rotor height adjustment dial provided on a meter panel (not shown) provided in the vicinity of the control seat 31.

  When the rotor height is manually set, the center rotor 27b and the left and right side rotors 27a, 27a are moved during the next seedling planting operation while the center rotor 27b and the left and right side rotors 27a, 27a are moved to the storage position. Although it cannot be used, such a problem can be prevented by automatically adjusting the center rotor 27b and the left and right side rotors 27a, 27a to the set height.

  As shown in the side view of the seedling planting part 4 in FIG. 3, the rotor vertical movement motor 79 is attached to the lifting arm 81, and when the seedling planting part 4 is lifted, the center rotor 27b and the left and right side rotors 27a, 27a are The center rotor 27b and the left and right side rotors 27a, 27a may be raised when the seedling planting portion 4 is lowered. As a result, the center rotor 27b and the left and right side rotors 27a, 27a can be lowered during coasting turning, and only the turning trace can be leveled. In this case, when the lifting link switch 92 that is turned on when the upper link 40 of the seedling planting unit 4 is rotated more than a predetermined height is actuated, the control device 100 controls the drive of the rotor lifting motor 79. In such a configuration, the rotor vertical movement motor 79 can be automatically operated, so that the operability is improved as compared with the prior art.

  Further, as shown in FIG. 3, a spring 78 is provided between the outside of the rotor transmission case 73 near the leveling rotor 27b and the lifting arm 81 to support the center rotor 27b and the left and right side rotors 27a and 27a. Yes. Further, as shown in FIG. 1, a rotor cover 37 is provided above and behind the center rotor 27 b and the left and right side rotors 27 a and 27 a so that mud is not applied to the floats 55 and 56.

Incidentally, NaeUe Tsukeden kinematic aluminum frame 89 to the distal end of the case 50 (FIG. 4, FIG. 3) Since the fixed and can be detachably attached to the support frame 65 the leveling rotor 27 and seedling planting apparatus 52 such as a unit The time and labor required for attaching and detaching during maintenance work are reduced.

  As described above, the center rotor 27b and the left and right side rotors 27a and 27a are normally lifted by operating the rotor lifting / lowering motor 63. In this embodiment, the seedling planting device 52 is provided with an engine. When a saddle clutch (not shown) for transmitting the power of 20 is disengaged by operating the saddle clutch lever 14 (FIG. 2), the rotor lifting / lowering motor 63 is actuated and automatically the center rotor 27b and the left and right side The rotor 27a, 27a is moved down to perform leveling work.

For this purpose, a saddle clutch lever sensor (not shown) for detecting whether the saddle clutch lever 14 (FIG. 2) is on or off is provided.
Therefore, when the heel clutch is disengaged by operating the heel clutch lever 14 in order to adjust the number of planting strips in the headland and the vicinity thereof, the heel clutch lever sensor (not shown) moves the heel clutch lever 14 (FIG. 2). ) Is detected, and the center rotor 27b and the left and right side rotors 27a, 27a are automatically lowered by a control device (not shown) to perform leveling work.

Thereby, it is possible to reliably level the headland or the vicinity of the headland which is likely to be rough in the field.
Although the tip of the rake 83 is fixed to the leveling support frame 76, as shown in the side view of the rotor portion in FIG. 10, when the rotor is raised to the storage position, the leveling support frame 76 rotates in the first leveling. Since the arm 75a moves upward, the rear end of the rake 83 jumps up. Thus, when the rotor is stored, the rake 83 cannot level the farm scene.

  In this way, the rake 83 does not roughen the field scene by not leveling the field scene more than necessary.

2 vehicle body
4 seedling planting department
27 leveling rotor (leveling device)
27a side rotor
27b side rotor
5 0 seedling planting transmission cases
5 5 Center float
5 6 side float
75a 1st leveling arm
75b Second leveling rotation arm 76 Leveling support frame 77 Leveling vertical movement device 79 Rotor vertical movement motor (vertical movement actuator)
80 Fan-shaped gear 81 Rotor vertical arm (lifting arm)

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 is a seedling planting part (4) that moves up and down via a lifting link mechanism (3) to the rear part of a traveling vehicle body (2) having left and right front wheels (10) and left and right rear wheels (11). ) And a leveling device (27) for leveling the farm scene, a handle (34) for steering the left and right front wheels (10) is provided on the traveling vehicle body (2), and the leveling device A leveling support frame (76) for supporting (27) is provided, and a leveling device (27) is provided in front of the machine body relative to the leveling support frame (76), and the leveling device (27) is provided on the traveling vehicle body (2). A center rotor (27b) provided at the center in the left-right direction, left and right side rotors (27a) provided on the left and right sides of the center rotor (27b) and on the rear side of the machine, the center rotor (27b), and left and right side rotors ( 27a) left and right rotors connecting Constituted by dynamic case (73), the left and right first ground leveling rotating arm which connects the left and right sides of the left and right side rotor (27a) and the leveling support frame (76) (75a) provided, first leveling the left and right A second leveling rotation arm (75b) for connecting the left and right side rotors (27a) and the leveling support frame (76) is provided between the left and right of the rotation arm (75a), and the second leveling rotation arm (75b) is provided. A leveling vertical movement device (77) for raising and lowering the leveling device (27) is provided . The leveling vertical movement device (77) includes a vertical movement actuator (79) and a fan-shaped gear ( 80), the sector gear (80) and the second leveling rotation arm (75b) are connected by a lifting arm (81), and a plurality of planting driving forces are supplied to the seedling planting part (4). Planting transmission case (50) A center float (55) is disposed behind the right side rotor (27a) and detects the height of the field between the left and right side floats (56) and behind the center rotor (27b). ) And left and right first leveling rotary arms (75a) are provided with left and right third leveling rotary arms (75c) projecting forward, respectively. (75c) are connected by a reinforcing frame (82), a bent portion is formed at the center in the left-right direction of the reinforcing frame (82) so as to straddle the center float (55), and the second leveling rotation arm (75b) ) From the left and right rotor transmission cases (73). The connecting member (71) extending from the left and right central sides to the connecting member (71) is connected to the lower end of the lifting arm (81). A suspension spring (78) for suspending the center rotor (27b) is provided between the stay provided on the frame (81) and a steering wheel detection means (96) for detecting steering of the handle (34) is provided. When the steering angle that can be regarded as turning is detected by the steering control means (96), the seedling planting part (4) is raised and the leveling device (27) is operated by operating the leveling vertical movement device (77). A control device (100) for performing ascending control is provided, a portal-type support frame (65) for supporting the seedling mounting base (51) of the seedling planting part (4) is provided, and the lifting link mechanism (3) is The upper link (40) and the lower link (41) connected to the traveling vehicle body (2) side, and the vertical link (4) connected to the top ends of the upper and lower links (40, 41) and supporting the seedling planting part (4) 43) with a parallel link comprising A seedling transplantation machine, characterized in that the link (43) is arranged inside the support frame of the gantry (65).

The invention according to claim 2 is configured such that the leveling device (27) moves up and down by rotating around the leveling support frame (76) by the leveling vertical movement device (77), and a rake for leveling the farm scene. (83) is attached to the rear side of the ground leveling support frame (76) through the mounting piece (83a), and when the leveling device (27) is raised to the non-working position, the rake (83) is grounded and the leveling device ( 27. The seedling transplanter according to claim 1, wherein the rake (83) is separated from the farm scene when the step 27) is lowered to the working position .

According to a third aspect of the present invention, there are a plurality of stays provided on the lifting arm (81), and the suspension spring (78) is selectively attached to the plurality of stays and suspended when the leveling device (27) is raised. The contact roller provided in the vicinity of the spring (78) is in contact with the lower link (41) of the lifting link mechanism (3), and the center rotor (27b) is positioned below the left and right side rotors (27a). The seedling transplanting machine according to claim 1 or 2, characterized in that.

The invention according to claim 4 is provided with an elevating detection means (92) for detecting when the upper link (40) of the seedling planting part (4) rotates more than a predetermined height, and the control device (100) ascent control to, claim 1, characterized in that it has a configuration that performs control for increasing the leveling device actuates the leveling vertical movement device (77) prior to the detection of the elevation detecting means (92) (27) It is a seedling transplanting machine given in any 1 paragraph of Claim 3 .

Further , the leveling vertical movement device (77) and the second leveling rotation arm (75b) are connected by the lifting arm (81), so that the leveling device (27) can be adjusted in accordance with the lifting operation of the leveling vertical movement device (77). Since the working height can be changed, the leveling of the field scene and the seedling planting accuracy are improved.

Furthermore , since the center rotor (27b) and the left and right side rotors (27a) are supported at a plurality of positions in the left and right direction, the center rotor (27b) and the left and right side rotors (27a) are prevented from being lifted by ground resistance, Leveling and seedling planting accuracy will be improved.

Moreover , since the connection of the structural members of the leveling device (27) can be strengthened by connecting the front side of the leveling device (27) with the reinforcing frame (82), the leveling device (27) is connected to the field scene. And the entire leveling device (27) is lifted up integrally when the leveling device (27) is moved to the non-working position, so that part of the leveling device (27) is brought into the field. It is prevented from entering and ruining the farming scene.

When the seedling transplanter turns, the seedling planting portion (4) is raised in conjunction with the steering of the handle (34), and the leveling device (27) is raised by operating the leveling vertical movement device (77). Therefore, the leveling device (27) is prevented from roughing the field scene, and the seedling planting depth is stabilized.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the leveling device (27) is raised to the non-working position, the rake (83) contacts the ground, so the leveling device (27) On the contrary, even in a soil field where the field scene is apt to collapse when the slab is applied, the ground can be leveled by the rake (83), and the planting depth and planting position of the seedling are stabilized.
Further, when the leveling device (27) is lowered to the work position, the rake (83) is separated from the farm scene, so that the farm scene can be prevented from being excessively leveled.

According to invention of Claim 3, it has the effect of invention of Claim 1 or Claim 2.
The invention according to claim 4 also has the effect of the invention according to claim 1 or claim 2.

A drawing arm 67 is provided on both sides of the aircraft.
FIG. 3 shows a side view of the main part of the rotor support structure. The rotor support structure is provided with a lifting arm 81 whose upper end is rotatably supported by the support frame 65 of the seedling stage 51. The lower end of the lifting arm 81 is rotatably supported by a second leveling rotation arm 75b described later via a connecting member 71.

The suspension spring 78 of the center rotor 27 b is provided between a stay provided on the front side of the left rotor transmission case 73 and a stay provided on the upper portion of the rotor suspension arm 81. There are a plurality of stays on the suspension arm 81 side, which are selected and attached.

On the other hand, when the leveling rotor 27 is lowered, the leveling rotor 27 is lowered in accordance with the lowering stage of the seedling planting unit 4, and at the latest the seedling planting unit 4 is lowered to the working height and the seedling planting is started at the stage where seedling planting is started. Lower 27 so that it begins to level the field. (Transmission to the leveling rotor 27 is performed via the transmission shaft 72. However, when the seedling planting portion 4 is raised to a non- working height (about 30 cm), the transmission is cut off, and when lowered, the transmission is connected. .)
That is, as in the conventional configuration, the leveling rotor 27 also moves up and down as the seedling planting unit 4 moves up and down. However, in the conventional configuration, when the seedling planting unit 4 is raised or lowered to a predetermined height by a mechanical configuration, the leveling rotor In the present embodiment, when the seedling planting part 4 is raised or lowered to a predetermined height, the control device 100 operates the vertical movement actuator 79 to move the leveling rotor 27. It is configured to raise / lower.

FIG. 8 is a side view of the main part of the seedling planting section 4 when the leveling device 77 is attached to the seedling planting section support frame 65 and the center rotor 27b and the left and right side rotors 27a, 27a are on the field scene. 9 is a center rotor 27b and the left and right side rotor 27a, fragmentary side seedlings planting unit 4 when increasing the 27a from the field plane of FIG. 8, the sector gear 80 second leveling rotating arm 75b Are connected by a lifting arm 81.

Note that the rear side of the center float 55 and the side floats 56 may be provided to prevent the arm 1 92 float floating.
As shown in the perspective view of FIG. 6 and the side view of FIG. 7, the upper end of the rake 83 for leveling the farm scene is fixedly attached to the leveling support frame 76 via the attachment piece 83 a fixed to the rake 83. When the rotor 27b and the left and right side rotors 27a, 27a are moved to the non-working position, the rake 83 is grounded, and when the center rotor 27b and the left and right side rotors 27a, 27a are moved to the working position, the rake 83 is separated from the field scene. The rake 83 is attached to the leveling support frame 76 as described above.

Or, the handle potentiometer 96 for detecting the steering of the steering wheel 34 is provided, the steering angle the handle potentiometer 96 can be regarded as turning: If (eg 30-45 °) for detecting a, the elevating hydraulic cylinder 46 is regarded as a swivel working In addition, the rotor vertical movement motor 79 may be actuated prior to the detection of the lift link switch 92 to raise the rotor suspension arm 81 and raise the leveling rotor 27.

As shown in the side view of the seedling planting part 4 in FIG. 3, the rotor vertical movement motor 79 is attached to the lifting arm 81, and when the seedling planting part 4 is lifted, the center rotor 27b and the left and right side rotors 27a, 27a are The center rotor 27b and the left and right side rotors 27a, 27a may be raised when the seedling planting portion 4 is lowered. As a result, the center rotor 27b and the left and right side rotors 27a, 27a can be lowered during coasting turning, and only the turning trace can be leveled. In this case, when the up / down link switch 92 that is turned on when the upper link 40 of the seedling planting unit 4 is rotated by a predetermined height or more is actuated, the control device 100 performs drive control of the rotor vertical movement motor 79. In such a configuration, the rotor vertical movement motor 79 can be automatically operated, so that the operability is improved as compared with the prior art.

As described above, the center rotor 27b and the left and right side rotors 27a and 27a are normally lifted by operating the rotor vertical movement motor 79. In this embodiment, the seedling planting device 52 is provided with an engine. When a saddle clutch (not shown) for transmitting the power of 20 is disengaged by operating the saddle clutch lever 14 (FIG. 2), the rotor vertical movement motor 79 is actuated to automatically operate the center rotor 27b and the left and right sides. The rotor 27a, 27a is moved down to perform leveling work.

Claims (7)

A traveling vehicle body (2) traveling in the field, a seedling planting part (4) for planting seedlings loaded at the rear of the traveling vehicle body (2), and a leveling device (27) for leveling the field scene where the seedlings are planted are provided. In the seedling transplanter,
In order to support the leveling device (27), the leveling support frame (76) that is full in the width direction of the traveling vehicle body, and the leveling device (27) is provided in front of the traveling vehicle body (2) with respect to the leveling support frame (76),
A seedling transplanting machine, wherein a leveling rotation arm (75) for rotatably supporting the leveling device (27) is provided on the leveling support frame (76). The leveling rotation arm (75) includes left and right first leveling rotation arms (75a) that connect the left and right side portions of the leveling device (27) and the leveling support frame (76), and left and right first leveling rotation arms (75a). ), And the left and right second leveling rotation arms (75b) connecting the leveling device (27) and the leveling support frame (76),
The seedling transplanter according to claim 1, wherein a leveling vertical movement device (77) for moving the leveling device (27) up and down is provided on the left and right second leveling rotation arms (75b). The leveling vertical movement device (77) includes a vertical movement actuator (79) and a sector gear (80),
The seedling transplanter according to claim 2, wherein the sector gear (80) and the second leveling rotation arm (75b) are connected by a lifting arm (81). The leveling device (27) includes a left and right side rotor (27a) and a center rotor (27b) provided on the left and right sides of the center rotor (27b) and the center rotor (27b) and on the rear side of the traveling vehicle body (2). Consists of left and right rotor transmission cases (73) connecting the side rotor (27a),
Side floats (56) are arranged behind the left and right side rotors (27a), respectively.
A center float (55) for detecting the depth of the field is disposed between the left and right sides of the left and right side floats (56) and the left and right seedling planting transmission case (50) and behind the center rotor (27b).
The left and right first leveling rotation arms (75a) are provided with left and right third leveling rotation arms (75c) projecting forward toward the front side of the traveling vehicle body (2). (75c) are connected by the reinforcing frame (82),
The seedling transplanter according to claim 2 or 3, wherein a bent portion is formed at the center in the left-right direction of the reinforcing frame (82) so as to straddle the center float (55) and has a convex shape in plan view. The upper end of the rake (83) for leveling the farm scene is rotatably attached to the leveling support frame (76), and when the leveling device (27) is moved to the non-working position, the rake (83) is grounded, and the leveling device The rake (83) is attached to the leveling support frame (76) so that the rake (83) is separated from the farm scene when the (27) is moved to the work position. The seedling transplanter according to Item. A planting depth frame (85) long in the left-right direction connecting the center float (55) and the left and right side floats (56) is attached to the seedling planting transmission case (50),
The rake (83) and the planting depth frame (85) are connected by a connecting rod (86), and the rake (83) is vertically rotated in accordance with the raising and lowering of the seedling planting part (4). The seedling transplanter according to any one of claims 1 to 5. A plurality of attachment holes (87a) are formed in an attachment stay (87) for attaching the connecting rod (86) to the planting depth frame (85),
A configuration in which the rotation amount of the rake (83) corresponding to the raising / lowering amount of the seedling planting part (4) is changed by attaching one end of the connecting rod (86) to any one of the plurality of attachment holes (87a). The seedling transplanter according to claim 6, wherein

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