JP2008079532A - Seedling planting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling planting machine that reduces the size and weight of the machine body so as to facilitate the operability and workability, and lowers the center of gravity of the machine body for performing stable seedling planting operation and operation traveling, when the body of the seedling planting machine is, furthermore, to be set to a riding configuration. <P>SOLUTION: The seedling planting machine has a constitution where a center frame 5 downward curved or bent from a frame front end part 2 positioned above a space between left and right front wheels 1 to a frame rear end part 4 positioned between right and left rear wheels 3, is formed as the main part of the body, and a seedling supply device 6 and a seedling-planting beak 7 are provided above the front part of the center frame 5, an engine 8 and a seat 9 are provided above the rear part, and a step floor 10 is provided at an intermediate part of the front and the rear parts. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a seedling planting machine that has a light-weight and compact configuration and that enables stable seedling planting and that facilitates operability.

A front and rear substantially horizontal frame from the front end to the rear end is used as a vehicle body, a seedling supply device and a seedling planting plant are provided on the front part of this frame, an engine and a seat are provided on the rear part, and steps are provided at the front and rear intermediate parts. A technique (for example, refer to Patent Document 1) is known for a seedling transplanter that provides a floor.
JP 2006-141367 A (page 3, page 4, FIG. 3).

  The seedling transplanter uses seedling planting in the form of accommodating and holding seedlings in the seedling transplanting machine, especially for transplanting vegetable seedlings such as lettuce, cabbage, onion, etc. In many cases, an operator operates a seedling planting machine to replenish seedlings to each stock supply device, and in order to facilitate this operability and workability, it is strongly desired to reduce the size and weight of the aircraft. Furthermore, when this vehicle body is in a riding form, it is necessary to lower the position of the center of gravity in order to perform stable seedling planting work and work travel.

  The invention according to claim 1 is provided with a center frame 5 formed in a concave shape in a side view of the body from a frame front end portion 2 positioned above the left and right front wheels 1 to a frame rear end portion 4 positioned between the left and right rear wheels 3. The seedling supply device 6 and the seedling planting basket 7 are provided on the front part of the center frame 5, the engine 8 and the seat 9 are provided on the rear part, the step floor 10 is provided in the front and rear intermediate part, A seedling planting machine configured to support and provide a grounding sensor 11 for lifting control and to move the left and right front wheels 1 up and down based on detection of the grounding sensor 11 is adopted. The front wheel 1 or the rear wheel 3 is driven by the engine 8, and the seedling supply device 6, the seedling pod 7 and the like are driven to perform seedling planting work. In the posture in which the worker has boarded the seat 9, the seedling replenishment work is performed in the seedling supply device 6 on the front side while the top surface of the step floor 10 is stepped on. At this time, since the step floor 10 is configured at a low position, the interval between the sheet 9 and the front seedling supply device 6 is set short, and the height of the sheet 9 is also set low. Operations such as seedling replenishment of the 6th part of the seedling supply device on the front side are facilitated, and the center of gravity of the machine body can be maintained at a low position. In addition, when the work such as seedling replenishment performed while walking down from the seat 9 or when the vehicle turns by operating the rear handle, the front and rear length of the fuselage, particularly between the front wheel 1 and the rear wheel 3 Since the wheel base is set to be short, these operations and operations can be facilitated. Further, in vehicle height control such as seedling planting depth control, the height of the planted soil surface is detected by the ground contact of the ground sensor 11, and when the soil surface is high, the front wheel 1 is moved up. The front part of the vehicle body and the seedling planter 7 are raised. Conversely, when the soil surface is low, the front wheel 1 is moved down to lower the front part of the vehicle body and the seedling planter 7. The raising and lowering control is performed so that the seedling planting depth with respect to the soil surface is maintained substantially constant. At this time, since the grounding position of each front wheel 1, the planting position of the seedling planting plant 7, the grounding position of the grounding sensor 11, and the like are at substantially the same position in the traveling direction of the vehicle body, the accuracy of the lifting control is improved. Can do. And the error of the raising / lowering control by the height change of the soil surface accompanying a vehicle body advance, the shift | offset | difference of the timing of this height detection position and seedling planting position, etc. is reduced.

  The invention according to claim 2 is characterized in that the front wheel 1 is moved up and down with respect to the rear wheel 3 to raise and lower the seedling planting position. At the time of seedling planting work, the seedling planting basket 7 holds the seedling supplied from the upper seedling supply device 6 and moves down to the lower soil surface, and holds it while forming a planting hole in the soil surface. Plant the seedlings in this planting hole. The depth of these planting holes, the planting depth of the seedlings, and the like are determined by the height position of the vehicle body relative to the soil surface. Move and do. The height of the vehicle body on the rear wheel 3 side of the vehicle body is maintained substantially constant, and the seedling planting pod 7 located on the front wheel 1 side is moved up and down so that the planting depth of the seedling is maintained substantially constant. Control.

  In the first aspect of the present invention, since the front and rear intermediate portions of the center frame 5 are formed in a concave shape, the height of the seat 9 and the front seedling supply device 6 as well as the step floor 10 formed on the concave portion is provided. The position can be set low, and the distance between the front and rear seedling supply devices 6 and the seat 9 can be shortened, the structure can be simplified and reduced in weight, and the center of gravity can be lowered. Therefore, planting performance can be maintained at a high level and stable seedling planting can be performed. In addition, it is easy to maintain a working posture such as seedling replenishment of the front-side seedling feeding device 6 part, and an easy working posture can be maintained. In addition, when walking while turning down from the seat 9, such as replenishing seedlings, or operating and turning the rear handle, the front and rear length of the fuselage, especially between the front wheel 1 and the rear wheel 3 Since the wheel base is set short, these operations and operations can be facilitated. Further, since the ground sensor 11 for lifting control is supported from the front portion of the concave center frame 5, the space for arranging the ground sensor 11 can be widened, and the space can be used effectively, and the entire body can be made compact. Furthermore, the detection accuracy of the ground sensor 11 can be maintained well. Moreover, since the grounding position of each front wheel 1, the planting position of the seedling planting plant 7, the grounding position of the grounding sensor 11, and the like are substantially the same position in the traveling direction of the vehicle body, the error of the lifting control is reduced, Accuracy can be increased.

  According to the second aspect of the present invention, in the elevation control of the vehicle height, the height of the vehicle body on the rear wheel 3 side of the vehicle body is maintained substantially constant, and the front wheel 1 side where the seedling planter 7 is located is moved up and down. Therefore, the vertical movement of the car body is reduced so that the vertical movement of the vehicle body can be reduced and effective and stable vertical movement control can be performed.

  Based on the illustrated example, the seedling machine body has a center frame 5 that curves downward or bends from a frame front end 2 located at the upper part between the left and right front wheels 1 to a frame rear end 4 located between the left and right rear wheels 3. The seedling supply device 6 and the seedling planting basket 7 are provided on the front part of the center frame 5, the engine 8 and the seat 9 are provided on the rear part, and the step floor 10 is provided on the front and rear intermediate parts. The configuration. The rear wheel 3 is driven by the engine 8 and the seedling feeding device 6 and the seedling pod 7 are driven to perform seedling planting work. In a posture in which the operator has boarded the seat 9, a seedling replenishing operation or the like in the front seedling supply device 6 is performed with the upper surface of the step floor 10 being stepped on. At this time, since the step floor 10 is configured at a low position, the interval between the sheet 9 and the front seedling supply device 6 is set short, and the height of the sheet 9 is also set low. It is easy to maintain the working posture such as seedling replenishment of 6 parts of the front seedling supply device, and the heavy core position of the machine body is maintained at a low position. The center frame 5 is made of a tube material having a round cross section, an elliptical shape, a rectangular tube material, or the like, and is curved or bent into an arcuate shape. Although the center frame 5 has a single configuration, it can also be configured in such a manner that two or more sub-lines are arranged in parallel on the left and right, depending on the thickness, rigidity, and the like. The center frame 5 as a main body is provided with sub-frames for each part for supporting and mounting the front wheels 1 and the rear wheels 3 as well as the seedling supply device.

  The front wheel 1 disposed on the left and right sides of the front portion of the center frame 5 is provided with a front wheel support shaft 12 projecting from the center position of the curved portion of the center frame 6 to the left and right sides. A bearing is rotatably provided around the axle 18 at the end of the front wheel arm 13 protruding downward. These left and right front wheel arms 13 are provided so as to be rotatable up and down integrally or individually by a pitching cylinder 14 or a rolling cylinder 15. These left and right front wheels 1 are provided opposite to the left and right lateral positions of the front end portion of the center frame 5, and the frame front end portion 2 of the center frame 5 is set to a position higher than the front wheel 1 so that the seedling supply device 6 and It is configured to mount a seedling planting basket 7 or the like.

  A transmission case 16 on which the engine 8 is mounted is integrally attached to the frame rear end 4 of the center frame 5, and left and right rear axles 19 are protruded from the transmission case 16 to the left and right sides of the rear axle housing 17. A wheel 3 is attached, and the vehicle can travel while being driven to rotate by driving the engine 8. Further, a seat 9 support bracket 20 is provided on the rear end portion 5 of the center frame, and the seat 9 is supported at the upper end by adjusting to an appropriate height. A handle frame 22 having a pair of left and right handles 21 is attached at a position offset from the rear end portion 4 of the frame to the rear right side of the seat 9. The handle frame 22 is provided with an operation plate 23, and a main clutch lever 24, an elevating lever 25 for raising and lowering the vehicle body by hydraulically operating the pitching cylinder 14, a switch 26 and the like are arranged. Each of the left and right handles 21 is provided with a side clutch lever 27 and a throttle lever 28.

  The front wheel 1 is moved up and down with respect to the rear wheel 3 to control the raising and lowering of the seedling planting position. The elevation control such as the vehicle height is performed by moving the front wheel 1 up and down relative to the rear wheel 3. The height of the vehicle body on the rear wheel 3 side of the vehicle body is maintained substantially constant, and the seedling planting pod 7 located on the front wheel 1 side is moved up and down so that the planting depth of the seedling is maintained substantially constant. Control. A link bracket 30 is integrally attached to the front wheel support shafts 12 on the left and right sides, and the front wheel arm 13 can be turned up and down by turning the bracket 30. The central pitching cylinder 14 is attached to a support bracket 31 that is integral with the frame rear end 4 of the center frame 5 and has an arm 32 at the front end. Can move. The arm 32 is formed in a U-shape that projects to the left and right sides, and that both end portions are located behind the center portion. The distal ends of the left and right arms 32 are connected to the corresponding link brackets 30 on the front side via link rods 33. The rolling cylinder 15 is provided on the link rod 33 on one side (right side) of the left and right link rods 33, and the right front wheel 1 is moved up and down with respect to the left front wheel 1 by expansion and contraction of the rolling ring cylinder 15. The left and right inclined postures of the front portion of the vehicle body are corrected to the left and right horizontal state and controlled to be maintained.

  Between the left and right front wheels 1, a seedling planting basket 7 and a grounding sensor 11 for lifting control are provided at a position substantially along the front wheel shaft 18. As described above, in the vehicle height control such as the seedling planting depth control, the height of the planted soil surface is detected by the grounding of the grounding sensor 11, and when the soil surface is high, the front wheel 1 is raised. The front part of the vehicle body and the seedling planter 7 are moved up, and when the soil surface is low, the front wheel 1 is moved down to move the front part of the vehicle body and the seedling planter 7. Is raised and lowered so as to maintain the seedling planting depth with respect to the soil surface substantially constant. At this time, since the grounding position of each front wheel 1, the planting position of the seedling planting plant 7, the grounding position of the grounding sensor 11, etc. are substantially the same position in the traveling direction of the vehicle body, the accuracy of the lifting control is improved. Can do. And the error of the raising / lowering control by the height change of the soil surface accompanying a vehicle body advance, the shift | offset | difference of the timing of this height detection position and seedling planting position, etc. is reduced.

  The ground sensor 11 is in the form of a sled plate, and is pivotally supported 52 on the front end of the support arm 51 below the front portion of the center frame 5 so as to be pivotable up and down, and the rear lower end portion is brought into sliding contact with the soil surface G. By connecting the upper end of the grounding sensor 11 and a switching control valve of a hydraulic circuit for switching expansion and contraction of the pitching cylinder 14 by an interlocking rod 53, the pitching is detected by detecting the height of the soil surface G by the grounding sensor 11. The cylinder 14 is expanded and contracted, the front wheel 1 is moved up and down, and the front part of the center frame 5 is controlled up and down. An operating lever 54 located on the front side of the Stetz floor 10 is provided at the base of the support arm 51 for mounting and supporting the grounding sensor 11, and the setting height of the grounding sensor 11 is adjusted by rotating the operating lever 54 back and forth. The position can be changed. Further, the seedling planting basket 7 is provided so as to be planted on both the left and right sides of the ground sensor 11. Moreover, the culture disc 47 for cultivating the planting hole formed by the seedling planting shoots 11 is provided close to the rear side of these seedling planting plants 11. The support frame 55 is rotatably supported by a support arm 55 provided from the rear side to the front side of the center frame 5, and the front end of the support arm 55 can be supported by the frame front end portion 2 and can be adjusted up and down by a handle 56. The cultivating depth by the cultivating disc 47 is adjusted according to the change of the seedling planting depth or the like.

  The rear axle housing 17 is provided so as to be able to rotate back and forth around the rear wheel output shaft 34 with respect to the transmission case 16. The rear axle housing 17 has an arm 35 integrated with the rear axle housing 17 and the bracket 30 corresponding thereto. They are linked by a link rod 36 and interlocked so that the rear wheel 3 is moved back and forth along with the vertical movement of the front wheel 1 by the operation of the pitching cylinder 14. When the rear wheel 3 is moved to the front side (FIG. 3) and the steering wheel 21 is gripped and the vehicle body front wheel 1 side part is lifted around the rear wheel 3 to turn the vehicle, The position can be changed to the rear side to facilitate the turning operation.

  The step floor 10 is provided with subframes 38 on both the left and right sides of the upper part of the center frame 5, and the subframe 38 is provided with a seedling feeding device 6, a seedling planting basket 7, etc. The transmission case 39 and the step floor 10 are attached and supported. This seedling planting transmission case 39 is disposed on both the left and right sides on the front side of the step floor 10 and is provided with a cup conveyor 41 in which the seedling supply cup 40 of the seedling supply device 6 is connected endlessly on the upper side. A seedling planting basket 7 is provided at the front end of the planting links 42 and 43 that move up and down in a parallel configuration on the outer side of the transmission case 39 on the lower side. The middle part of the planting link 42 is driven up and down via a crank arm 44 rotated from the transmission mechanism of the transmission case 39, the crank rod 45, etc., and the left and right seedling planting ridges 7 are used to plant seedlings in two left and right rows. It is comprised in the form which performs. Further, the seedling planting basket 7 is configured to operate so as to draw an elliptical seedling planting locus D whose lower end portion is long in the vertical direction by this raising and lowering when the vehicle body travel is stopped. A seedling funnel 46 is formed on the upper side of the seedling planting pot 7, and when the seedling planting pot 7 is raised, the opening of the seedling is closed, the seedling is supplied from the seedling cup, and the lowering process is started. Then, when the seedling planting pod 7 is inserted into the soil surface G, this cocoon is opened left and right to form a planting hole, and the seedling is dropped from this cocoon into the planting hole so that the seedling is left in the planting hole. Thus, the hook is actuated upward. This planting hole is cultivated up to the seedling by the soil cultivating action by the subsequent soil cultivating disk 47 to support the planting posture.

  Further, the seedling planting transmission case 39 is transmitted from the rear case side 16 via a transmission shaft 48. The transmission shaft 48 is provided along the lateral side of the pitching cylinder 14 between the left and right step floors 10. The installment conveyor 41 is adjusted between the left and right conveyor sprocket shafts 49, and the cup conveyor 41 is rotated in a certain direction by driving the sprocket shaft 49 from the transmission mechanism of the transmission 8 case 39. At the rear side, the operator supplies seedlings one by one into each seedling cup 40, and at the front side, every time the seedling cup 40 is positioned on the seedling funnel 46 of the seedling planting plant 7, The seedling is configured to fall into the seedling funnel 46.

  When performing seedling planting work, the operator sits on the seat 9 and advances the vehicle body while operating the clutch lever 24 of the right-hand side operation plate 23, the lifting lever 25, etc., and performs the seedling planting work. . During this seedling planting operation, the transmission mechanism in the seedling planting transmission case 39 is transmitted by the transmission of the transmission shaft 48, and when the seedling planting clutch therein is engaged, the crank arm 44 rotates and the planting link The seedling planting basket 7 is driven up and down by 42 and 43, and the cup conveyor 41 is driven through the sprocket shaft 49. An operator takes out the seedlings prepared in advance on a seedling supply stand (not shown) arranged in front of the seedling supply device 6 and the like, and seedling cups on the rear side of the cup conveyor 41 that rotates every seedling. 40. When the seedling cup 40 that has received this seedling has reached the planting position on the front side, the bottom of the seedling cup 40 is opened and falls into the seedling funnel 46 of the seedling planting stand 7 waiting on the lower side. Supplied. The seedlings thus supplied to the seedling planting plant 7 are planted on the soil surface G by the planting operation of this seedling planting plant.

  Further, when changing the advancing direction of the vehicle body, for example, when leaning, the operator gets off the seat 9 and holds the rear handle 21 to steer the aircraft. When the soil surface is a mere flat ground and swivels greatly, or when steering is changed while planting seedlings, it can be steered by operating the side clutch 27. In the form where seedlings are planted on the upper surface G of the seedlings while the seedling planting operation is traveling along the ridges, the operator pushes down the handle 21 to turn the front wheel 1 side into the groove surface M when turning back at the heel end. The vehicle can be turned and turned only by the support of the left and right rear wheels 3 with the weight of the airframe being transferred to the rear wheels 3 in a state where the vehicle is levitated from above. At this time, if the front wheel 1 is lowered with respect to the vehicle body by operating the elevating lever 25, the rear wheel 3 is moved to the front side, and the front part of the airframe can be easily lifted. The rear side movement of the heavy core is easily performed, and the body support by the rear wheel 3 and the turning operation are easily performed.

  Next, mainly based on FIG. 4 and FIG. 5, the seedling planting basket 7 is configured as a single planting form in the vehicle width center portion, and the front and rear seedling planting baskets 7 and the like and the rear seat 9 It is arranged and configured in a form in which the distance is close, and the entire length of the aircraft is shortened. And this seedling planting basket 7 is attached to the rear end part of the planting links 42 and 43 which go up and down centering on the upper position of the front-wheel axis | shaft 18. As shown in FIG. The elevating links 42 and 43 are provided on the upper side of the front wheel support shaft 12 provided in the lateral direction on the lower side of the center frame 6 so as to intersect from the front side to the rear side. Reference numeral 7 denotes a form in which seedlings are planted on the soil surface G at the rear side position of the front wheel support shaft 12. The ground sensor 11 is pivotally supported 52 so as to be vertically rotatable with respect to a bracket 60 protruding downward from a seedling transmission case 39 integrally attached to the front end 2 of the frame. The operating lever 54 protrudes. Further, the bracket 60 is provided with a support arm 55 toward the rear, and a culture disc 47 is attached to the rear end. On the upper side of the center frame 5 are provided step floors 10 on both the left and right sides, and on the upper side of the step floor 10 are the raising and lowering seedling planting ridge 7, planting links 42 and 43, seedling planting transmission case 39, etc. A seedling cover 61 is provided to cover the outer periphery extending from the left and right lateral sides to the rear side. The transmission shaft 48 connected from the transmission case 16 side to the input shaft of the seedling transmission case 39 is provided at a high position on the side of the step floor 1 on the one side. The operator sits on the seat 9 so as to straddle the seedling planting cover 61 from side to side, and the seedling planting cover 61 prevents contact with the seedling planting cage 7 and the like that are planted. A seedling supply device, a seedling supply stand, and the like are mounted on the upper side of the seedling planting transmission case 39 and the like (not shown).

  Next, based on FIGS. 6 and 7, the left and right rear axle housings 17 are rotated around the rear wheel output shaft 34 extending from the transmission case 34 attached to the frame rear end 4 of the center frame 5 to the left and right sides. The housing arm 65 is provided, and the housing arm 65 and the both ends of the arm 32 moved back and forth by the pitching cylinder 14 are connected via the link rod 33 and the rolling cylinder 15. The link rod 33, the rolling cylinder 15 and the like are positioned below the side portion of the seat 9. Although the configuration is such that the pitching cylinder 14, the rolling cylinder 15 and the like are operated by the detection of the installation sensor 11 disposed in the center between the left and right front wheels 1, the rear wheel 3 is controlled to move up and down. It is also possible to configure the front wheel 1 to be controlled up and down.

  The single-planting seedling planting basket 7 is installed at the front center of the step floor 10. Therefore, a frame bent portion 66 is formed by bending the front portion of the center frame 5 to the side so as to bypass the position of the seedling planting plant 7 to the side, and the frame front end portion 2 at the front end is connected to the left front wheel 1. The left end portion of the front wheel bracket 67 that supports the front wheel axle 18 at both right and left ends is supported so as to be able to roll. The front wheel arm 13 is provided so as to hang downward from both ends of the front wheel bracket 67, and the front wheel 1 is rotatably supported at the lower end portion. Further, a support frame 68 is projected forward from the front wheel bracket 67, a support shaft 69 is passed between these front end portions, and a roller arm 71 provided with a guide roller 70 is mounted so as to be movable along the support shaft 69. Support. By sliding and guiding the pair of left and right guide rollers 70 along the slope where seedlings are planted, the steering direction of the vehicle body can be set along the ridge direction.

  The planting links 42 and 43 of the seedling planting plant 7 pivotally support the seedling planting case 7 so that it can be turned up and down with respect to the seedling planting transmission case 39 located at the upper part of the frame front end unit 2. Is located on the rear end side. And these seedling planting seeds 7, the planting links 42 and 43, the seedling planting transmission case 39, etc. are covered with the seedling planting cover 61 in the form of a bonnet. A step floor 10 is formed between the seedling planting 7 parts and the rear seat 9 part to form a floor space in the front-rear direction. The floor space part has a rear transmission case at the upper left side. A transmission shaft 48 that interlocks and connects between the input shafts of the front seedling planting transmission case 39 from the 16 output shafts is provided so as not to obstruct getting on / off and moving of the worker on the step floor 10. .

The side view of a seedling transplanter. The plan view. The side view of the seedling transplanter which shows states, such as the wheel movement. The side view of the seedling transplanter which shows a part another example. The top view of the seedling transplanter. The side view of the seedling transplanter which shows a part another example. The plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Frame front end 3 Rear wheel 4 Frame rear end 5 Center frame 6 Seedling supply device 7 Seedling planting 8 Engine 9 Seat 10 Step floor 11 Ground sensor

Claims (2)

  A center frame (5) formed in a concave shape in a side view of the fuselage from the frame front end (2) positioned above the left and right front wheels (1) to the frame rear end (4) positioned between the left and right rear wheels (3). A seedling feeder (6) and a seedling planting basket (7) are provided on the front part of the center frame (5), an engine (8) and a seat (9) are provided on the rear part, and a step floor is provided in the front and rear intermediate part. (10) is provided, and a grounding sensor (11) for lifting control is supported from the front of the center frame (5), and the left and right front wheels (1) are moved up and down based on the detection of the grounding sensor (11). A seedling transplanter with a moving configuration.   The seedling planting machine according to claim 1, wherein the front wheel (1) is moved up and down with respect to the rear wheel (3) to raise and lower the seedling planting position.

Images