JP2006211995A5 - - Google Patents

Description

Seedling transplanter

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

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

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

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

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

An object of the present invention is to solve the above-mentioned problems and to realize an appropriate leveling work in a farm field.
Furthermore, the subject of this invention is reducing the load concerning a leveling apparatus, and providing the economical seedling transplanter with sufficient work efficiency.

The said subject of this invention is achieved by employ | adopting the following structures.
The invention according to claim 1 is provided with a traveling vehicle body (10) provided with driving wheels (3, 4) , a seedling planting portion (20) is provided on the rear side of the traveling vehicle body (10), and the seedling planting portion ( 20), the leveling device (22) is supported on the front side, and the rotational power of the engine (9) is transmitted to the transmission case (2) via the hydraulic continuously variable transmission (60) and the drive wheels (3, 4). ) And an external take-off power for driving the leveling device (22), the leveling device (22) is arranged on the transmission path to the leveling device (22) when traveling backward. The seedling transplanter is provided with a back reverse rotation prevention clutch (62) for preventing reverse rotation .

The invention according to claim 2 is configured such that the seedling planting part (20) can be pitched forward and backward, and the leveling device (22) is pitched forward and backward together with the seedling planting part (20). It is set as the structure connected and supported with a planting part (20), The vertical movement apparatus (23) which moves a leveling apparatus (22) up and down with respect to the said seedling planting part (20) is provided, The said seedling planting part ( The seedling transplanting machine according to claim 1 , wherein the leveling device (22) is raised by the vertical movement device (23) in conjunction with the pitching movement while 20) is tilted forward. is there.

  According to the present invention, it is possible to realize proper leveling work in a farm field. Furthermore, it is possible to provide a seedling transplanter that reduces the load applied to the leveling device and is economical and efficient.

  A six-row planting type rice transplanter as an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall side view of the riding type rice transplanter of this embodiment, and FIG. 2 is a plan view of the rice transplanter of FIG.

  In the rice transplanter 1, a seedling planting unit 20 as an agricultural work machine unit is connected to a rear side of the traveling vehicle body 10 via an elevator connection device 15 so as to be movable up and down. The traveling vehicle body 10 is a four-wheel drive vehicle including a pair of left and right front wheels 3 and 3 and rear wheels 4 and 4 which are drive wheels, and a mission case 2 is disposed at the front of the fuselage. Front wheel final cases 21 and 21 are provided on the left and right sides of the front wheel, and the front wheels 3 and 3 are attached to a front wheel axle that protrudes outward from a front wheel support that can change the steering angle of the front wheel final cases 21 and 21. . Further, the front end portion of the main frame 25 is fixed to the rear portion of the transmission case 2, and a rear wheel gear case 29 with a rear wheel rolling shaft provided horizontally at the front and rear left and right central portions of the main frame 25 as a fulcrum, The rear wheels 4 and 4 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 29 and 29.

  The engine 9 is mounted on the main frame 25, and the rotational power of the engine 9 is transmitted to the transmission case 2 via the first belt transmission device 26 and a hydraulic continuously variable transmission 60 capable of continuously variable transmission. . Then, after being shifted by the transmission in the transmission case 2, it is separated into traveling power and external power to be taken out.

  A part of the traveling power is transmitted to the front wheel final cases 21, 21 to drive the front wheels 3, 3, and the rest is transmitted to the rear wheel gear cases 29, 29 to drive the rear wheels 4, 4. Further, the external take-out power is transmitted to a planting clutch case 30 provided at the rear portion of the traveling vehicle body 10, and then transmitted to the seedling planting unit 20 through a planting transmission shaft 31.

  The upper part of the engine 9 is covered with an engine cover 11, and a seat 12 is installed thereon. A front cover 7 accommodating various operation mechanisms is provided in front of the seat 12, and a handle 8 for steering the front wheels 3 and 3 is provided above the front cover 7. The engine cover 11 and the front cover 7 have horizontal floor steps 6 on the left and right sides of the lower end. The rear portions of the front cover 7 and the floor step 6 are rear steps 14 that are higher than the floor step 6. On the left and right sides of the front part of the traveling vehicle body 10, the spare seedling platforms 47 and 47 (FIG. 2) on which the replenishment seedlings are placed rotate to a position projecting laterally from the machine body and a position accommodated inside. It is provided as possible.

The lifting and lowering connecting device 15 has a parallel link configuration, and includes a single upper link 13a and a pair of left and right lower links 13b and 13b. These links 13 (13a, 13b, 13b) are rotatably supported by a link base frame 32 standing on the rear end of the main frame 25 at the base side, and the vertical link 5 is connected to the tip side. Yes. The leveling device base frame 17 is supported on the lower end portion of the vertical link 5 via the first connecting shaft 16 in the front-rear direction, and the leveling device 22 is attached to the traveling vehicle body 10 so as to be able to roll left and right. Further, a seedling planting portion 20 is supported on the lower end portion of the leveling device base frame 17 via a second connecting shaft 18 in the front-rear direction, and the seedling planting portion 20 is attached so as to be capable of rolling left and right.
Further, a rotor 27, which is an example of a leveling device 22, is attached via the rotor upper and lower cylinders 23.

  A piston rod of a lifting hydraulic cylinder 35 whose base is pivotally attached to the main frame 25 is connected via a spring to the tip of a seedling support frame 50 integrally formed with the upper link 13a. By extending and contracting, the upper link 13a rotates up and down, and the seedling planting part 20 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 20 has a six-row planting structure, a transmission case 49 that also serves as a frame, and a seedling mounting table 34 that carries seedlings and reciprocates left and right to feed seedlings one by one to the seedling outlet 48a of each row. , Seedling planting devices 19 for planting seedlings supplied to the seedling outlet 48a,.

  In the lower part of the seedling planting part 20, a center float 38 is provided in the center, and side floats 39, 39 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 38, 39 in contact with the mud surface of the field, the floats 38, 39 slide while leveling the mud surface, and the seedling planting device 19, ... Planted. The floats 38 and 39 are pivotably mounted so that the front end side 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 38 is detected by the vertical movement detection mechanism during planting work. Then, according to the detection result, the planting depth of the seedling is always kept constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 35 to raise and lower the seedling planting unit 20.

  The seedling planting unit 20 will be described in more detail. A center float sensor 38a constituted by a potentiometer that detects the vertical position of the front portion of the center float 38 is linked to the upper surface of the front portion of the center float 38 by a link. Based on the detection of the vertical position of the front part of the center float 38 of the center float sensor 38a, the vertical position of the seedling planting part 20 is controlled by the hydraulic cylinder 35 by the lifting means of the seedling planting part 20 of the control device (not shown). It is configured to control.

  That is, when the front part of the center float 38 is lifted to an appropriate range or more by external force, the hydraulic oil pumped out from the transmission case 2 by a hydraulic pump (not shown) is sent to the hydraulic cylinder 35 to project the piston. The pitching link device 43 is moved up and down to lower the seedling planting part 20 to a predetermined position, and when the front part of the center float 38 is in an appropriate range (when the seedling planting part 20 is in an appropriate predetermined position). ) Is provided to stop the pressure oil in and out of the hydraulic cylinder 35 and hold the seedling planting portion 20 in a fixed position. In this way, the center float 38 is used as a ground sensor for automatic height control of the seedling planting unit 20.

The seedling planting portion 20 is not shown in detail, but the seedling mounting table 34,... Is slidable to the left and right by the power on the traveling vehicle body via the planting transmission shaft 31 (FIG. 1). By reciprocating left and right, the seedling located at the lowermost stage of the seedling stage 34 is supplied to the seedling outlet 48a (FIG. 2), and the seedling device 19,. When the seedling stage 34,... Moves to the end of the left and right stroke and all the lowermost seedlings are planted, the seedling feeding belt 51 operates to transfer the seedlings on the stage downward by one stage. Further, a planting rod clutch 33 (FIG. 3) for switching the operation and stop of the planting device 19 by two adjacent units is provided in the transmission case 49. The clutch 33 is turned on and off by a planting rod clutch lever (not shown) provided on the handle post.
At this time, in the case of a six-row planting rice transplanter, one planting rod clutch lever is provided on each of the two seedling planting tools 36.

  Next, a pitching mechanism that causes the seedling planting portion 20 to perform a pitching operation on the traveling vehicle body 10 will be described. A hydraulic pitching cylinder 42 is provided in the middle of the upper link 13 a of the pitching link device 43, and the length of the upper link is changed by the expansion and contraction of the pitching cylinder 42. The drive pitching movement can be performed.

  The front upper link 13a is formed of a hollow square pipe material, and the fitting member 43b fixed to the front end of the rear upper link 43a is slidably fitted into the rear end of the front upper link 13a. A leading end of the piston 42a of the pitching cylinder 42 fixed to 13a is fixed to the rear upper link 43a. Accordingly, when the pressure oil is supplied to and discharged from the pitching cylinder 42 and the piston 42a advances and retreats, the fitting member 43b fixed to the front end of the rear upper link 43a slides in the rear end portion of the front upper link 13a, The link length is changed.

  And the rotor 27 which is an example of the leveling apparatus 22 is attached to the seedling planting part 20 via the leveling apparatus base frame 17 and the rotor up-and-down cylinder 23. The rotor 27 is configured to move up and down in conjunction with the pitching movement of the seedling planting portion 20 by the rotor up and down cylinder 23.

FIG. 3 is a plan view of a main part of the seedling planting device of the rice transplanter shown in FIG.
When the engine power is transmitted to the transmission shaft 40 by the bevel gear mechanism and the planting rod clutch 33 is engaged, each seedling planting tool 36 is driven. Further, a lead cam (moving left and right while engaging with a protrusion provided on the inner peripheral portion in the direction of the central axis in a groove provided in a constantly rotating lead cam shaft 37a extending from the seedling transplanter transmission gear case 41. A seedling table 34 (FIG. 2) connected to the unillustrated plate moves to the left and right.

  When the lead cam moves to the left and right, for example, when it moves to the left, the left and right seedling vertical feed arms (one-way) in which the seedling vertical feed cam 71 (FIG. 1) at the tip of the lead cam shaft 37a is directly connected to the vertical feed transmission shaft (not shown). In the case of 72 (FIG. 1) with a clutch, the longitudinal feed belt 51 (FIG. 2) is rotated by one planting of the seedling.

  A rotor 27 having a plurality of rotor blades 27a arranged at a predetermined pitch in the rotor rotation direction is mounted in the leveling device cover 28 having the rear wheel cutout portion 28a, and the rotor operation is performed from the input portion 46 to the rotor operation portion. The power from the engine 9 is transmitted to the portion 45, and the rotor 27 is activated.

  As shown in FIG. 1, the rotor 27 is tilted back and forth (pitched) together with the seedling planting portion 20 by a pitching cylinder 42. The seedling planting unit 20 controls the operation of the pitching cylinder 42 based on the detection of the front / rear tilt sensor of the traveling vehicle body 10 and moves the pitching so as to have a desired front / rear tilt posture. The rotor 27 moves up and down with respect to the seedling planting portion 20 by a pair of left and right rotor upper and lower cylinders 23.

  Further, the leveling rake portion 28b is a part of the leveling device cover 28 and is a portion extending the rear side of the leveling device cover 28, and mud generated from the leveling rotor 27 remains between the left and right floats and does not form unevenness. As such, it has the function of supplementarily leveling the soil in front of the left and right floats.

  As described above, the seedling planting portion 20 on the rear side of the traveling vehicle body 10 can be pitched back and forth, and the rotor 27 is attached to the front side of the seedling planting portion 20 as an example of a leveling device. The rotor 27 is connected to and supported by the seedling planting unit 20 via the rotor vertical cylinder 23 and the leveling device base frame 17 so as to move forward and backward together with the seedling planting unit 20.

  The rotor up / down cylinder 23 is configured to move the rotor 27 up and down relative to the seedling planting portion 20 and to raise the leveling device rotor 27 in conjunction with the seedling planting portion 20 being pitched while tilting forward.

  Then, the floats 38 and 39 may be tilted forward while the airframe 1 is turning (floating turn), and the rotor 27 is lifted slightly by the rotor upper and lower cylinders 23 to smooth the ground.

  By adopting such a configuration, the rotor 27 can smooth the wheel and the headland can be roughened, and an appropriate leveling work can be realized. Further, when the rotor 27 is operated during the turning of the airframe 1 (during a floating turn), the load applied to the rotor 27 increases. Therefore, raising the rotor 27 has an effect of reducing the load.

  On the other hand, in the case of the rice transplanter 1 without a pitching mechanism, when the rice transplanter 1 is lifted forward, the rotor 27 is slightly raised and the floats 38 and 39 are pressed against the field scene when the body 1 is turning (floating turn). It is good also as a structure which operate | moves like this.

  When the rice transplanter 1 is lifted forward, the hydraulic float detection becomes dull, and the farm scene is over-pressed by the rotor 27. With this configuration, over-pressing can be prevented.

  FIG. 4 shows an operation interlocking mechanism diagram of the seedling planting device 19 and the leveling device (rotor) 22 of the riding type rice transplanter 1 shown in FIG. In the configuration having the rotor 27, as shown in FIG. 4, the power from the HST 64 is transmitted to the transmission 61 as transmitted by the planting drive system, and the seedling planting unit 20 and the rotor via the back reverse rotation prevention clutch 62. 27 is transmitted to a clutch 63 for switching to H.27. On the lower transmission side of the switching clutch 63, the power transmission system is switched between a planting clutch (not shown), a power transmission system to the safety clutch 65, and a rotor operating unit 66 during a floating turn.

Normally, the rotor 27 and the seedling planting unit 20 are configured to operate in the forward direction as the rice transplanter 1 moves forward.
Here, the back reverse rotation preventing clutch 62 is a clutch that prevents the seedling planting portion 20 and the rotor 27 from rotating reversely when the rice transplanter 1 is moved backward. In the present embodiment, the rotor operating unit 66 is provided in a position parallel to the planting clutch of the seedling planting unit 20.

  With such a configuration, when the rice transplanter 1 is moved backward, the rotor 27 and the seedling planting portion 20 are prevented from reversely rotating, and the seedling planting portion 20 and the rotor 27 are rotated in the backward direction (reverse direction) during backward movement. The trouble to try can be prevented.

  In addition, as shown in FIG. 4, in place of the back reverse rotation prevention clutch 62 in front of the operating portion 66 of the rotary rotor 27 in the drive system, the rotor 27 and the seedling planting portion 20 are overloaded by the resistance force of the field. In order to prevent this, a safety clutch that turns off the power transmission to the rotor 27 and the seedling planting portion 20 when an overload is applied, that is, a limit for preventing the rotor 27 and the seedling planting portion 20 from operating when overloaded. The clutch 62 may be provided.

  Further, as shown in the plan view of FIG. 5A, the rotors 27 on both sides are arranged with the inner end inclined forward from the direction in which the rotor rotation axis is orthogonal to the forward direction of the rice transplanter 1. Then, the muddy water is introduced in the forward direction so that it does not come out. With this configuration, mud accumulated in front of the rotor 27 by overflowing mud can be prevented from overflowing to the side, and so-called muddy water pushing to adjacent strips can be prevented, and mud can be discharged rearward.

  In the conventional general configuration shown in FIG. 5 (b), the rotors 27, 27 on both sides are arranged so that the rotor rotation axis is orthogonal to the forward direction of the rice transplanter 1, so It is easy to generate mud.

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

  The present invention is applicable to paddy seedling transplanters such as a riding rice transplanter.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall side view showing a six-row planted rice transplanter that is an embodiment of the present invention. It is a top view of the riding type rice transplanter shown in FIG. It is a principal part top view of the seedling planting apparatus of the riding type rice transplanter shown in FIG. It is an operation | movement interlocking | linkage mechanism figure of the planting apparatus and leveling apparatus (rotor) of the riding type rice transplanter which is one Example of this invention. The top view (FIG. 5 (a)) which shows the structure of the leveling apparatus (rotor) of the riding type rice transplanter of one Example of this invention, and the top view (FIG.5 (b)) which shows the structure of the prior art leveling apparatus. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Mission case 3 Front wheel 4 Rear wheel 5 Vertical link 6 Floor step 7 Front cover 8 Handle 9 Engine 10 Traveling vehicle body 11 Engine cover 12 Seat 13 Link (up and down) 13a Upper link 13b Lower link 14 Rear step 15 Lifting connection device 16 First connecting shaft 17 Leveling device base frame 18 Second connecting shaft 19 Seedling planting device 20 Seedling planting part 21 Front wheel final case 22 Leveling device 23 Rotor upper and lower cylinder 24 Frame 25 of leveling device Main frame 26 First belt transmission device 27 Leveling rotor 27a Rotor blade 28 Leveling device cover 28a Rear wheel cutout portion 28b Leveling rake portion 29 Rear wheel gear case 30 Planting clutch case 31 Planting transmission shaft 32 Link base frame 33 Planting rod clutch 34 Seedling stage 35 Lifting hydraulic Cylinder 50 Seedling stand support frame 36 Seedling planting tool 37 Seedling receiving plate 37a Lead cam shaft 38 Center float 38a Center float sensor 39 Side float 40 Transmission shaft 41 Seedling planting gear transmission gear case 42 Pitching cylinder 42a Piston 43 Pitching link device 43a Rear upper link 43b Fitting member 44 Rotor support arm 45 Rotor operating part (rotor transmission case)
46 Input Portion to Rotor Actuator (Rotor Transmission Case) 47 Preliminary Seedling Stand 48a Seedling Removal Port 49 Transmission Case 51 Seedling Feed Belt 60 Hydraulic Continuously Variable Transmission 61 Transmission 62 Back Reverse Reverse Prevention Clutch (Limit Clutch)
63 Planting rotor switching clutch 64 HST
65 Safety Clutch 66 Rotor Actuation Unit 71 When Turning the Machine 71 Seedling Vertical Feed Cam 72 Seedling Vertical Feeding Arm

Claims (2)

A traveling vehicle body (10) having drive wheels (3, 4) is provided, a seedling planting part (20) is provided on the rear side of the traveling vehicle body (10), and a leveling device ( 22), the rotational power of the engine (9) is transmitted to the transmission case (2) via the hydraulic continuously variable transmission (60) to drive the drive wheels (3, 4), and In the seedling transplanter configured to be branched to the external take-out power that drives the leveling device (22), the reverse reverse rotation that prevents the leveling device (22) from reversing during reverse travel is caused in the transmission path to the leveling device (22). A seedling transplanting machine provided with a prevention clutch (62) . The seedling planting part (20) is configured to be capable of pitching back and forth,
  The ground leveling device (22) is connected to and supported by the seedling planting part (20) so as to pitch back and forth with the seedling planting part (20),
  A vertical movement device (23) for moving the leveling device (22) up and down relative to the seedling planting part (20) is provided,
  In conjunction with the seedling planting part (20) pitching while tilting forward,
  The seedling transplanter according to claim 1, wherein the leveling device (22) is raised by the vertical movement device (23).