JP4483685B2 - Seedling transplanter - Google Patents

Description

  The present invention belongs to the technical field of a seedling transplanting machine for transplanting a vine-like seedling such as a persimmon seedling in a horizontal posture.

While advancing the aircraft with the traveling device, the sandwiched seedlings are plunged into the soil in a posture in the front-rear direction, and after moving in the front-rear direction in the soil, the sandwiching of the seedlings is released, and in a state where the sandwiching is released There is known a seedling transplanter configured to plant seedlings in a posture in the front-rear direction (lateral posture) by a seedling planting clamp that moves and exits from the soil. This seedling transplanter can plant seedlings so that the vine portion is long buried in the soil by releasing the sandwiching of the seedlings after the seedling planting clamp moves in the soil in the front-rear direction ( (See Patent Document 1).
JP 2004-236524 A

  The seedling transplanting machine of the above-mentioned background art is easy to lift by hooking the vine part long buried in the back and forth in the soil of the seedling planted at the time of withdrawal operation when the seedling planting clamp moves upward and exits the soil. The vines buried inside may be exposed from the soil or the planting depth of the seedlings may become shallow, which may reduce the planting accuracy of the seedlings.

  Then, this invention makes it a subject to enable it to transplant a seedling appropriately in a sideways posture.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 , while the aircraft is advanced by the traveling device 4, the sandwiched seedlings are plunged into the soil in a posture in the front-rear direction, and the seedlings are sandwiched after moving in the front-rear direction in the soil. In a seedling transplanting machine configured to plant seedlings in a posture directed in the front-rear direction by a pair of seedling planting clamping tools 31 that are released and moved out of the soil in a state in which the clamping is released, and exit from the soil. The upper end portion of the support link portion 36 of the seedling planting body 6 is rotatably connected to the tip end portion of the drive arm 34 attached to the drive shaft 35 of the planting transmission case 32, and the swing link 37 is connected to the lower end portion of the support link portion 36. The rear end of the swing link 37 is rotatably supported by a support shaft 39 provided at the rear end of a support frame 38 whose front is fixed to the planting transmission case 32, Said one The planting pincer 31 is provided by fixing the distal end of the pair of support portions 41 of the planting body 6, when exiting the operation of planting pincer 31, the rush position planting pincer 31 rushes into the soil A presser 91 that presses down the soil between the seedling planting and holding tool 31 and the holding release position for releasing the holding of the seedling in the soil is provided slidably on a cylindrical slide guide 90 fixed to the support link portion 36. A spring 93 is always provided between the presser 91 and the slide guide 90 to urge the presser 91 upward, and the presser 91 is inserted into the slide guide 90 by a slide portion 91a and a presser portion 91b that contacts the soil surface. And a pressing surface 91c having a convex curved surface is formed on the lower side of the pressing portion 91b. A driving body 91d is provided at a connecting portion between the sliding portion 91a and the pressing portion 91b. When exit operation of the jig 31 abuts from the lower side presser actuating cam 92該駆body 91d is fixed to the support frame 38, the hold-downs 91 protrudes by a sliding movement on the lower side, presser fixings 91 The seedling transplanting machine is characterized in that the pressing surface 91c is moved to the rear side of the machine body.
Therefore, in the seedling transplanting machine, the presser 91 can press the soil above the vine portion buried in the soil of the seedling planted during the withdrawal operation of the seedling planting clamp 31 from above. Then, the presser 91 is slidably provided on a cylindrical slide guide 90 fixed to the support link portion 36, and a spring 93 that constantly biases the presser 91 upward is provided between the presser 91 and the slide guide 90. The presser 91 is composed of a slide portion 91a inserted into the slide guide 90 and a presser portion 91b that comes into contact with the soil surface, and a presser surface 91c having a convex curved surface is formed below the presser portion 91b. A drive body 91d is provided at a connecting portion between the portion 91a and the pressing portion 91b, and when the seedling planting clamp 31 is withdrawn, the driving body 91d comes into contact with a pressing operation cam 92 fixed to the support frame 38 from below. As a configuration in which the pressing tool 91 protrudes downward by sliding movement, the pressing surface 91c of the pressing tool 91 is moved to the rear side of the machine body. When pressed over the soil of a portion of the vine was buried in the soil of seedlings planted on departure operation of pincer 31 with a from above, so to move the pressing surface 91c of the retainer 91 to the rear side of the body, retainer The soil above the seedling planted so as not to roughen the soil surface by 91 can be appropriately pressed down.
In addition, since the pressing surface 91c of the pressing portion 91b has a convex curved surface on the lower side, even if the seedling planting body 6 rises while changing the front and back posture, it properly contacts the field scene and removes the soil. I can hold it down.

According to the second aspect of the present invention, when the presser 91 is in the retracted state, a space provided between the seedling planting clamps 31 at a position where the presser part 91b overlaps the upper portions of the pair of seedling planting clamps 31 in a side view. The seedling according to claim 1, wherein when the pressing tool 91 protrudes, the pressing portion 91 b passes between the tips of the opened seedling planting clamps 31 and descends. A transplanter was used.
Therefore, in addition to the action of the invention according to claim 1, when the presser 91 protrudes, the presser part 91b passes between the tips of the opened seedling planting clamps 31 and descends. The soil can be pressed at a position close to the pair of seedling planting clamps 31 by 91b, and the stock of the seedling can be pressed accurately.

  Therefore, since the soil above the planted seedling can be appropriately pressed without being roughened, the portion of the vine t that has been buried long in the soil in the soil of the seedling planted during the withdrawal operation of the seedling planting clamp 31 It is possible to prevent the seedling from being lifted by hooking it, and the seedling can be transplanted properly in a sideways posture.

A sweet potato seedling transplanter 1 as one embodiment of the present invention will be described below.
The seedling transplanter 1 has a seedling transporting unit 5 for transporting a sweet potato seedling N and a seedling planting for planting the seedling N transported by the seedling transporting unit 5 on a field provided with a traveling device 4 and a steering handle 2. A seedling planting body 6 serving as a device is provided. In the illustrated example, the traveling device 4 includes an engine 3, a pair of left and right rear wheels 7 that are driven and rotated by transmission of the power of the engine 3, and a pair of left and right front wheels that are rotatably supported in front of the rear wheel 7. 8 and so on.

  A mission case 9 is disposed at the rear portion of the engine 3, and the mission case 9 has a case portion extending from the left side portion to the left side of the engine 3, and this is connected to the left side portion of the engine 3. The output shaft of the engine 3 enters the case portion and the power is transmitted to the transmission mechanism in the transmission case 9. A transmission case 10 is rotatably attached to both left and right sides of the transmission case 9, and the tip of the wheel drive shaft extending from the transmission case 9 to the left and right outer sides enters the rotation center of the transmission case 10. Power for traveling is transmitted to the transmission mechanism in 10. The traveling power is transmitted to the axle 11 extending rearward of the machine body and projecting to the rear end side via the transmission mechanism in the transmission case 10, and the rear wheel 7 is driven to rotate. .

  Further, an upwardly extending arm 12 is integrally attached to the attachment portion of the transmission case 10 to the transmission case 9, and this is vertically aligned with the piston rod end of the lifting hydraulic cylinder 13 fixed to the transmission case 9. It is connected to the left and right sides of a balance rod 14 that is pivotably mounted around. The right side of the connecting portion is connected by a rod 15, and the left side is connected by a left / right horizontal control hydraulic cylinder 16 which can be expanded and contracted.

When the elevating hydraulic cylinder 13 is actuated and its piston rod protrudes rearward of the machine body, the left and right arms 12 are rotated rearward, and the transmission case 10 is rotated downward accordingly, and the machine body is raised. On the contrary, when the piston rod of the lifting hydraulic cylinder 13 is retracted forward, the left and right arms 12 are rotated forward, and accordingly, the transmission case 10 is rotated upward and the aircraft is lowered. The lifting hydraulic cylinder 13 is configured to operate the airframe to a set height with respect to the height of the upper surface of the aircraft based on the detection result of the sensor 17 that detects the height of the upper surface of the aircraft. It is also configured to operate so as to raise or lower the aircraft by human operation of the planting lift lever 18 disposed in the vicinity of the steering handle 2. The planting lifting / lowering lever 18 can be operated to turn on / off the seedling planting body 6 and the seedling transporting unit 5. Further, on the side of the planting lift lever 18, there is provided a main clutch lever 19 that can operate a main clutch (not shown) in the mission case 9 to turn on and off the traveling device 4.

  Further, when the left / right horizontal control hydraulic cylinder 16 expands / contracts, the balance rod 14 rotates around the vertical axis connected to the tip of the piston rod of the lifting / lowering hydraulic cylinder 13 at the center of the left / right to transmit left / right transmission. The case 10 is moved up and down alternately to tilt the aircraft to the left and right. The left / right horizontal control hydraulic cylinder 16 is configured to operate the airframe horizontally so as to be horizontal based on a detection result of a sensor (not shown) that detects right / left inclination of the airframe relative to the left / right horizontal.

  The left and right front wheels 8 are fixed to the side of the lower end portion of the arm portion 21 that extends downward at the left and right sides of the front wheel support frame 20 that is pivotally mounted around the axial center in the front-rear direction at the left and right center position below the engine 3. It is rotatably attached to the axle 22. Therefore, the left and right front wheels 8 are capable of rolling around the longitudinal center of the left and right center of the aircraft.

  The steering handle 2 is attached to a rear end portion of a handle frame 23 whose front end portion is fixed to the mission case 9. The handle frame 23 is disposed at a position deviated from the right and left center of the machine body to the right side and extends rearward, and extends obliquely rearward and upward from the front and rear intermediate portion. The steering handle 2 extends rearward left and right from the rear end portion of the handle frame 23, and the rear end portions thereof serve as grip portions 2 a and 2 a of the steering handle 2. The left and right grip portions 2a, 2a of the steering handle 2 are set to an appropriate height so that the operator can easily grip the grip portions 2a, 2a with hands. In the example shown in the figure, the grip portions 2a, 2a are divided into left and right, but the left and right rear end portions of the steering handle 2 may be connected to each other left and right, and the connecting portion may be used as the grip portion.

  The traveling device 4 has a four-wheel configuration, but may have a two-wheel configuration including only a pair of left and right drive wheels, or may be a pressure-reducing wheel that rolls on the upper surface instead of the front wheels. Moreover, it is good also as a crawler type traveling apparatus. Next, the seedling planting body 6 and the seedling transporting unit 5 will be described.

  The seedling planting body 6 is connected to a drive unit that moves the seedling planting action part 6a as a seedling holding tool up and down, and the seedling planting action part 6a (a pair of seedling planting clamping tools 31) of the seedling planting body 4 is a seedling. The seedlings that act on the seedlings transported by the transporting unit 5 are planted in the field.

  The drive unit that drives the seedling planting body 6 is provided in a planting transmission case 32 that includes a transmission mechanism that receives power for driving the seedling planting tool from the inside of the transmission case 9 and transmits it. As shown in the figure, the planting transmission case 32 is fixed to the first case portion 32a whose front portion is connected to the rear portion of the transmission case 9 and extends rearward and obliquely upward therefrom, and the upper left side portion of the first case portion 32a. It has a second case part 32b extending leftward and a third case part 32c fixed to the left end of the second case part 32b and extending obliquely downward. A transmission mechanism for transmitting power for driving the seedling planting body 6 from the first case portion 32a to the third case portion 32c is provided. The third case portion 32c is rotatably provided around the output shaft of the second case portion 32b, that is, the input shaft 33 of the third case portion 32c. The seedling planting body 6 and the seedling transporting section 5 are provided so as to be rotatable around the input shaft 33 of the third case section 32 c with respect to the traveling device 4. Further, the transmission mechanism built in the first case portion 32a includes an intermittent drive mechanism (not shown) for stopping the seedling planting body 6 at a position where the seedling planting body 6 is moved up and down or at a position near it, and a seedling. A planting clutch (not shown) for stopping the planting body 6 and the seedling transporting unit 5 is provided. The time for stopping by the intermittent drive mechanism is adjusted by a speed change mechanism (not shown) provided in the intermittent drive mechanism, and the adjustment between the seedling planting stocks by the seedling planting body 6 is adjusted by this adjustment.

  The seedling planting body 6 is driven by being connected to a drive arm 34 that rotates as a drive unit. The drive arm 34 is attached to a drive shaft 35 that protrudes from the rear right side portion of the third case portion 32c and rotates by a set bolt 34a. Then, the upper end portion of the support link portion 36 of the seedling planting body 6 is rotatably connected to the distal end portion of the drive arm 34, and the front end portion of the swing link 37 is rotatably connected to the lower end portion of the support link portion 36. ing. The rear end portion of the swing link 37 is rotatably supported by a support shaft 39 provided at the rear end portion of the support frame 38 that is fixed to the third case portion 32c and extends rearward. Therefore, when the drive arm 34 is driven and rotated, the seedling planting body 6a of the seedling planting body 6 moves along a locus T as shown in FIG. The trajectory T as shown in FIG. 1 is a motion trajectory (static trajectory) drawn by the seedling planting action unit 6a with respect to the aircraft, and the trajectory T ′ is a time when the aircraft travels forward at the set work speed. It is a movement locus (movement locus) which seedling planting action part 6a draws to a field.

  As shown in the enlarged perspective view of the seedling planting body 6 in FIG. 5, the seedling planting body 6 holds a pair of support parts 41 that are pivotally connected around the connecting shaft 40 and a seedling that is fixed to the tip of the support part 41. A pair of seedling planting clamps 31 and a pair of seedling planting clamp operating arms 42 fixed to the support portion 41 on the opposite side of the connection shaft 40 of the support portion 41 from the seedling planting clamp device 31. ing. In addition, these support part 41, a pair of seedling planting clamping tools 31, and a pair of seedling planting clamping tool operation arms 42 are inclined slightly forward and long in the vertical direction when viewed from the side of the machine body. Discs 42 a are provided at the upper ends of the seedling planting clamp operating arms 42, and the discs 42 a are in contact with the side surfaces of the cam 43. The connecting shaft is attached to the support link portion 36, and the protrusion 43a provided on the side surface of the cam 43 comes into contact with the disk 42a, so that the distance between the pair of seedling planting clamp operating arms 42 is widened. The support portions 41 rotate around the connecting shaft 40 so that the distance between the pair of seedling planting clamps 31 is increased. Therefore, the cam 43 is configured to sandwich the pair of seedling planting clamps 31 and release the clamping. A tension spring 44 is provided between the pair of support portions 41, and the pair of seedling planting clamps 31 are urged toward each other by the tension spring 44. In addition, dimples are provided on the opposing surfaces of the seedling planting clamp 31 to make it easier to clamp the seedling.

  The cam 43 is fixed to the distal end side of the drive arm 34 and rotates integrally with the drive arm 34. Accordingly, when the cam 43 is rotated by the driving force from the transmission case 32c, the cam 43 protrudes at the planting supply position A to the seedling planting body 6 near the top dead center of the planting locus T (T ′). The portion 43a abuts against the seedling-planting clamp operating arm 42 and moves in the direction in which the tips of the pair of seedling-planting clamps 31 close, and the lower end of the vine t of the sweet potato seedling N at the planting supply position A (planting supply) At the position, the sweet potato seedlings are oriented in the front-rear direction, so the rear end part) is clamped. The seedling planting body 6 embeds the seedling in the soil to the vicinity of the bottom dead center of the planting locus T (T ′) by rotating the drive arm 34 while the seedling is clamped by the seedling planting clamping tool 31, and the tip of the seedling planting body 6 is rearward. The projecting portion 43a of the cam 43 moves away from the seedling planting clamp operating arm 42 near the bottom dead center, and the tension spring between the pair of support portions 41 is operated. The tip of the pair of seedling planting clamps 31 is urged by 44 to move in the opening direction, and the sandwiched seedlings are released and transplanted into the soil. In addition, since the sweet potato seedlings N are supplied to the planting supply position A in a posture facing the front-rear direction by the seedling transport unit 5 described later, the seedling planting body 6 enters the soil in the posture facing the front-back direction as it is. The vine t of the sweet potato seedling N is transplanted in a posture inclined with respect to the soil surface D. In addition, since the seedling planting body 6 is operated and planted on the planting locus T extending rearward and downward, the seedling is planted in a state of being tilted forward.

  The pair of seedling planting clamps 31 opened near the bottom dead center of the planting trajectory T (T ′) and released from holding the seedlings operate while changing the front / rear posture from the forward tilted posture to the vertical posture side. When moving forward, the elevator moves up and escapes from the ground. Accordingly, since the seedling planting clamp 31 is close to the entry trajectory into the soil and the exit trajectory from the soil into the soil, the seedling planting clamp 31 is suitable for planting seedlings without making the planting holes in the field dark. Can be done. A cylindrical slide guide 90 is integrally fixed to the support link portion 36 in parallel. The slide guide 90 allows the seedling planting clamp 31 to enter the soil when the seedling planting clamp 31 is retracted. A pressing tool 91 that presses down the soil from above and between the entry position where the seedling planting clamp 31 releases the seedling in the soil and the clamping release position where the seedling planting clamp 31 is near the bottom dead center of the planting locus T (T ′). It is provided so as to be slidable with respect to the seedling planting clamp 31 (seedling planting body 6). The pressing tool 91 includes a slide portion 91a inserted into the slide guide 90 and a pressing portion 91b that contacts the soil surface. The pressing portion 91b is configured by bending a round bar so as to be convex downward, and has a convex curved surface on the lower side, and this curved surface becomes the pressing surface 91c. A driving body (driving pin) 91d is provided at a connecting portion between the slide portion 91a and the pressing portion 91b, and the driving body (driving pin) 91d is supported by the support frame 38 when the seedling planting clamp 31 is retracted. The pressing tool 91 protrudes downward by sliding movement and presses the soil from above by contacting the pressing operation cam 92 that is supported from the bottom and fixed to the machine body from below. The presser 91 is always urged upward by a spring 93 provided between the slide guide 90 and the driving body (driving pin) 91d abuts only when the seedling planting / holding tool 31 is retracted (when lifted). Thus, the pressing operation cam 92 is arranged. In the retracted state (upward state) of the presser 91, the presser 91b is positioned in a space provided between the seedling planting clamps 31 at a position overlapping the upper portions of the pair of seedling planting clamps 31 in a side view. To do. This space portion is formed regardless of the open / closed state of the pair of seedling planting clamps 31. When the presser 91 protrudes (descent), the presser part 91b passes between the tips (lower ends) of the pair of seedling planting clamps 31 in the open state and descends. The soil can be pressed at a position close to the seedling planting clamp 31 and the seedling stock can be accurately pressed. When the contact of the driving body (driving pin) 91d with the pressing operation cam 92 is released and the pressing tool 91 is retracted (raised), the pair of seedling planting clamps 31 has not yet reached the top dead center. Since it is in the open state, the presser 91 can be retracted (raised).

  If the pressing portion 91b is provided so as to be pivotable downward (rear) around the drive pin, the pressing tool 91 that retreats (rises) temporarily due to an assembly error or the like may interfere with the seedling planting clamp 31. Even if there is nothing, the pressing portion 91b rotates and retracts from the seedling planting clamp 31, and damage to the pressing portion 91b or the seedling planting clamp 31 and mechanical locking of the apparatus can be prevented. Moreover, even if the timing of the retreat (rise) of the presser 91 is set when the seedling planting clamp 31 is descending beyond the top dead center of the planting locus T (T ′), the seedling to be sandwiched is set. Since most of is located on the front side of the seedling planting clamp 31, the presser 91 can be retracted (raised) without acting much on the seedling. Moreover, if the scraper which drops the soil adhering to the seedling planting clamping tool 31 is attached to the pressing part 91b, the soil etc. adhering to the seedling planting clamping tool 31 can be dropped by the operation of the pressing tool 91.

  Further, the locus from the bottom dead center to the top dead center in the planting locus T (T ′), that is, the ascending locus is behind the entry position where the seedling planting clamp 31 enters the soil, and the seedling planting clamp 31 is When the driving body (driving pin) 91d abuts against the pressing operation cam 92 and the pressing tool 91 operates when the driving body (driving pin) 91d is in contact with the pressing release cam 92, the seedling planting clamping is performed. The tool 31 is located behind the entry position and ahead of the clamping release position.

Therefore, since the pressing tool is attached to the seedling planting body 6 in parallel with the support link portion 36 and the seedling planting body 6, the pressing tool 91 can be arranged in a compact manner. In addition, since the pressing operation cam 92 is fixed to the machine body side, as the seedling planting body 6 is raised, the pressing tool 91 protrudes obliquely rearward in a forward tilted posture. A driving mechanism (driving pin) 91d constitutes a moving mechanism for moving the pressing surface 91c of the pressing portion 91b to the rear side of the machine body . In addition, when the contact surface of the drive body 91d in the pressing cam 92 is protruded downward toward the front side, the soil can be pressed more strongly as the seedling planting body 6 moves upward while moving diagonally forward. The seedling can be pressed reliably. In addition, since the pressing surface 91c of the pressing portion 91b is a curved surface that protrudes downward, even if the seedling planting body 6 rises while changing the front and back posture, it properly contacts the field scene and presses the soil. Can do.

  Note that the pressing portion 91b may be configured by providing a plurality of round bars in parallel on the left and right sides, so that the pressing action of the soil can be reliably obtained. Further, a pressing operation cam 92 may be attached to the tip of the drive arm 34 integrally with the arm 34 so that the pressing tool 91 protrudes when the seedling planting body 6 is raised. Further, an adjusting means may be provided so that the operating amount, operating speed, or operating timing of the presser 91 can be adjusted by replacing the presser operating cam 92 with a different shape. Further, for example, a swinging arm that swings in conjunction with the swinging link 37 is provided separately, and a pressing operation cam 92 is attached to the swinging arm, for example, for pressing operation in conjunction with the operation of the seedling planting body 6. The cam 92 is configured to move back and forth with respect to the planting locus T (T ′), and the presser 91 reliably projects when the seedling planting body 6 is raised, and the pressing operation cam 92 when the seedling planting body 6 is lowered. It is better to ensure that does not work. This increases the degree of freedom of the size and shape of the pressing operation cam 92 itself, so that the operation amount, operating speed, or operation timing of the pressing tool 91 can be set as desired.

  Moreover, it may replace with the above-mentioned holding | suppressing tool 91, and you may provide the rotary pressing body 94 which contacts the agricultural field scene near a seedling planting position. The rotary pressing body 94 is forcibly rotated in conjunction with the rotation of the pressure-reducing wheel 84, which will be described later, and the pressing surface (outer peripheral surface) of the rotary pressing body 94 is moved at the same speed as its forward speed as the aircraft advances. A moving mechanism for moving to the rear side is configured. Thereby, it can prevent more reliably that the rotary pressing body 94 roughens soil. Note that a brush is provided on the pressing surface (outer peripheral surface) of the rotary pressing body 94 in order to reliably obtain the pressing action of the soil. Further, the rotary pressing body 94 has a configuration in which the diameter of the left and right central portions is small and the diameter of both left and right end portions is large when viewed from the front, and the seedling vine t corresponds to the left and right central portions when passing over the planted seedling. Thus, it is good also as a structure which can suppress damaging the growth point in the seedling vine t with the rotary pressing body 94. The fixed rotary presser 94 as described above needs to be arranged at a position where the seedling planting body 6 in the planting locus (static locus) T does not interfere with the seedling planting body 6 in the vicinity of the position where the seedling planting body 6 comes out of the soil. is there. In addition, it is good also as a structure which attaches a scraper to the right-and-left both sides | surfaces of the rotation pressing body 94, and removes the soil etc. which adhere to this seedling planting clamping tool 31 when this scraper contacts. It is also conceivable that air (pressure air) is blown onto the soil from above by a blower such as an electric fan to press the soil.

  In addition, protrusions projecting from the left and right outer surfaces of the pair of seedling planting clamps 31 are provided, and when the seedlings are planted, the path of the seedling vines is surely created to guide the vines, and the seedling planting clamps 31 are raised. It is preferable to prevent the seedlings planted by dropping the soil placed on the ridges into the passage.

  By the way, the transmission configuration in the third case portion 32c of the planting transmission case 32 is transmitted from the input shaft 33 of the third case portion 32c to the relay shaft 111 via the chain 110, and from the relay shaft 111 to a pair of transmission gears. It is configured to be transmitted to the drive shaft 35 output from the case portion 32 c via the 100 and 101. Further, the drive shaft 35 is transmitted through the three transmission gears 101, 112, 113 to the second drive shaft 114 that projects from the right side portion of the third case portion 32c and rotates. The second drive shaft 114 is disposed at the same position in the left-right direction as the drive shaft 35 and slightly above the drive shaft 35 and on the upper side. The drive arm 34 that drives the seedling planting body 6 can also be attached to the second drive shaft 114 so as not to come off by the set bolt 34a. As shown in FIG. 6, when the drive arm 34 is connected to the second drive shaft 114, the second drive shaft 114 is disposed on the rear side and the upper side of the drive shaft 35. Compared to the case where the swing link 37 is connected, the swing link 37 swings greatly in the vertical direction of the link 37 in a region close to the front-rear horizontal, and the planting locus T becomes smaller in the front-rear direction and larger in the vertical direction.

  Therefore, the planting locus changing means for changing the planting locus T is configured by changing the drive shaft connecting the drive arm 34 to the drive shaft 35 and the second drive shaft 114. Therefore, when cultivating sweet potatoes for edible use, etc., when it is desired to cultivate sweet potatoes per piece, the drive arm 34 is connected to the second drive shaft 114 to reduce the forward tilt of the seedling planting posture. Plant and ensure that each of the sweet potatoes that grow from the roots of the seedling obtain sufficient nutrients. On the other hand, when cultivating sweet potatoes such as processing, etc., when it is desired to cultivate a large number of sweet potatoes even if the size of the sweet potatoes is small, the drive arm 34 is connected to the drive shaft 35 to plant the seedlings. The plant is planted at the bottom of the boat by increasing the forward inclination of the plant to increase the number of sweet potatoes by increasing the number of seedling roots. Thus, the planting methods such as the seedling planting depth and planting posture by the seedling planting body 6 can be greatly changed. It should be noted that, regardless of the change in the planting locus T, it is desirable that the presser 91 be appropriately projected when the seedling planting body 6 is raised.

  The seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transporting direction C, which are seedling containers that store the sweet potato seedlings N in a posture in which the vine t faces in the front-rear direction. It has been transported by the upper lateral transporting part 5a transported in the right direction, the lowering transporting part 5b transporting the seedling container 26 transported by the upper lateral transporting part 5a to the lower part of the machine body, and the lowering transporting part 5b. And an ascending feed portion 5c that conveys the seedling container 26 upward and returns it to the conveyance start end side of the upper lateral feed portion 5a, and conveys the seedling container 26 along a single loop-shaped conveyance path. It is like that. Further, the upper lateral feed portion 5a is configured to protrude leftward from the left front wheel 8 and the rear wheel 7, and the left end is the outermost end on the left side of the aircraft. Further, the rear end of the upper lateral feed portion 5 a is disposed at a position behind the left front wheel 8 and the rear wheel 7. Accordingly, the worker supplies seedlings to the upper lateral feed portion 5a on the rear side of the left rear wheel 7 and the upper lateral feed portion 5a. The conveyance path is inclined so that the upper lateral feeding part 5a is located on the rear side in a side view, and the seedling container 26 of the upper lateral feeding part 5a is located at a position close to the operator on the rear side of the seedling conveying part 5. Is arranged so that the operator can easily perform the seedling supply operation to the seedling container 26 of the upper lateral feed portion 5a. The seedling planting body 6 is configured to plant the seedlings in the seedling container 26 transferred to the planting supply position A at the lowest position of the transport path of the seedling transporting unit 5 by the descending feed unit 5b in the field. Yes. The descending feed portion 5b is provided with a seedling fall prevention plate 45 that guides the seedling into the seedling accommodating portion 26 so that the seedling does not fall, supported by the support member 46 at the upper portion thereof. This seedling fall prevention plate 45 extends to the lower part of the seedling container 26 at the planting supply position, but the seedling fall prevention plate 45 is provided on the lower side in the transport direction of the seedling container 26 from the planting supply position A. Since the supporting member is not provided, the seedling N is prevented from interfering with the member supporting the seedling fall prevention plate 45 at the time of seedling planting in the seedling planting body 6 to damage the seedling or improper planting. The

  The seedling container 26 is shaped like a bowl that is long in the front-rear direction, and a receiving plate part 47 that serves as a receiving surface on which the seedling N is placed by the upper lateral feed part 5a and a side plate part 48 that serves as a surface that partitions the adjacent seedling container 26. And the upper lateral feed portion 5a has an open portion on the upper side. The seedling container 26 is made of resin so that the seedlings to be stored are not damaged. In addition, the receiving plate part 47 of the seedling container 26 is inclined so that the rear side is lower when positioned in the upper lateral feed part 5a, and the operator behind the seedling transport part 5 receives the upper lateral feed. The seedling supply operation to the seedling container 26 of the part 5a can be easily performed. Further, a seedling regulating rod 115 in the left-right direction is provided at a substantially center in the front-rear direction of the seedling container 26 so as to connect the both side plate parts 48 at a substantially center in the up-down direction of the left and right side plate parts 48. Accordingly, the operator simply places the vine t of the seedling N on the upper side of the seedling regulating rod 115 in the upper lateral feed portion 5a, and the bent side of the vine t of the seedling N becomes the lower side, which is the same as the bending of the vine t. The lower end of the vine t that bends to the side is bent downward, and the seedling can be supplied to the seedling container 26 in a desired state to be described later.

  In addition, the seedling container 26 has a shape that is open at the front and the rear, but is provided with a clip 49 that holds the rear end of the vine t of the seedling N at the rear end. The clip 49 is provided at a central position in the left-right direction of the seedling container 26, and includes a pair of left and right sandwiching bodies 50 and 52 that are integral with the seedling container 26 and protrude upward from the receiving plate portion 47. The pair of left and right holding members 50 and 52 are made of elastic rubber so as not to damage the vine t of the holding seedling N. Of the pair of left and right sandwiching bodies 50 and 52, the left sandwiching body 50 is in a hollow state having a space in the front view or the back view, and the upper surface 50a goes to the other (right) sandwiching body 52 side. The side surface 50b on the right holding body 52 side is bent to the opposite side (left side) to the right holding body 52 side at the upper and lower center of the plane facing in the vertical direction. It is the structure provided with the seedling holding | maintenance part 50c which comprises some space between the holding body 52 of this. The right sandwiching body 52 is formed as a single plate that bends, and continues below the sloped portion 52a and an inclined portion 52a that slopes toward the left sandwiching body 50 as it goes down to the upper end. And a planar side surface 52b facing in the vertical direction. When an operator supplies seedlings to the clip 49 with the upper lateral feed section 5a, the vine t of the sweet potato seedlings N is held between the upper surface 50a of the left holding body 50 and the inclined portion 52a of the right holding body 52 on the left holding body 50. It is easy to supply between the side surface 50b of the right side and the side surface 52b of the right sandwiching body 52. Then, when the operator pushes the seedling N downward, the right holding body 52 bends to the side (right side) away from the left holding body 50, and the vine t of the seedling N becomes a seedling holding portion 50c of the left holding body 50. The seedlings are clamped and fixed by a pair of left and right sandwiching bodies 50 and 52. The right sandwiching body 52 has a vine t diameter of the seedling N larger than the distance between the pair of left and right sandwiching bodies 50, 52 of the seedling holding portion 50c when the seedling N is supplied to the seedling holding portion 50c. The right sandwiching body 52 made of elastic rubber is urged toward the left sandwiching body 50 and a sandwiching force acts on the vine t.

  In addition, when the seedling is transported by the descending feeding portion 5b, the seedling may be rubbed against the seedling fall prevention plate 45 to damage the seedling N. Therefore, as shown in FIG. 8, by attaching a rubber elastic plate 53 to the side plate portion 48 of the seedling container 26, the elastic plate 53 is brought into contact with the seedling fall prevention plate 45 and bent at the descending feed portion 5b. The open part of the seedling container 26 can be covered with the elastic plate 53, and the seedling can be prevented from coming into contact with the seedling fall prevention plate 45.

  A plurality of the seedling containers 26 are attached to the chain 54, and the chain 54 is provided with a pair of front and rear sprockets 55 and 56 on the left and right on the upper side of the machine body and a pair of front and rear on the left and right on the lower side of the machine body. It is wound around the sprockets 57 and 58. The left and right sprockets 55 and 56 on the upper side of the machine body are attached to shafts 59 and 60 supported by a support member 46 fixed to the support frame 38. The left and right sprockets 57 and 58 on the lower side of the machine body are attached to shafts 62 and 63 supported by a support plate 61 fixed to the support frame 38. When the upper right sprocket 56 is driven, the seedling transport unit 5 is driven so that the seedling container 26 moves in the set transport direction C. And the drive part 64 of the seedling conveyance part 5 is interlockingly connected via the interlocking rod 66 with the front-end | tip part of the interlocking link 65 which rocks | fluctuates up and down integrally with the rocking | fluctuation link 37. As shown in FIG. In addition, the seedling container 5 stops so that the seedling container 26 stops until the seedling planting part 6a of the seedling planting body 6 holds the seedling until it descends, and the seedling container 26 moves at other times. Are provided to be intermittently driven.

  The specific structure of the drive unit 64 of the seedling transport unit 5 is, for example, as shown in FIG. First, the shaft 60 supported by the support member 46 is connected to the rear portion of the shaft 67 attached so as to rotate integrally with the upper right sprocket 56 via a shaft joint, and provided with a protrusion 68a attached to the shaft 67 so as to rotate integrally. The follower disk 68 is installed. Then, a drive arm 69 is rotatably attached to the shaft 67 on the rear side of the driven disk 68, and an upper end portion of the interlocking rod 66 is rotatably attached to a distal end portion of the drive arm 69. The drive arm 69 is provided with a claw 70 that engages with the protrusion 68 a of the driven disk 68. The claw 70 is operated by the sprocket 56 so that the drive arm 69 is operated in the set conveyance direction C of the seedling conveyance unit 5. Is rotated in the direction in which the disk is driven to rotate (when the drive arm 69 moves upward in FIG. 4), the driven disk 68 is integrally rotated by being engaged with and fixed to the protrusion 68a of the driven disk 68. When rotating in the opposite direction (when the drive arm 69 moves downward in FIG. 4), the ratchet mechanism prevents the driven disk 68 from rotating integrally with the protrusion 68a of the driven disk 68 so as to escape. Is configured. Two pawls 71 are provided to engage the protrusions 68a of the driven disk 68 with the driven disk 68 being prevented from rotating clockwise and counterclockwise. When the drive arm 69 rotates so as to rotate the driven disk 68 integrally, prior to the claw 70 of the drive arm 69 constituting the ratchet mechanism engaging the protrusion 68a of the driven disk 68, An anti-rotation release cam 72 provided integrally with the drive arm 69 prevents the leading end of the claw 71 that prevents the rotation of the driven disk 68 from engaging with the protrusion 68 a of the driven disk 68 so as to prevent the rotation of the driven disk 68. It is designed to move. Then, when the drive arm 69 is rotated to the stroke upper limit position and the driven disk 68 is rotated by a set angle (90 degrees in FIG. 4), the detent release cam 72 is disengaged from the detent 71 for detent. The claw 71 for preventing rotation again engages with the protrusion 68a of the driven disk 68, and the rotation of the driven disk 68 is fixed.

  Therefore, when the seedling planting holder 31 of the seedling planting body 6 holds the seedling and descends and plantes it in the soil, the seedling container 26 is stopped, so that the seedling is smoothly taken out from the seedling container 26 and is suitable. Certainly seedlings can be planted in the field. Thus, since the seedling planting body 6 or the member that operates by being connected to the seedling planting body 6 and the drive unit 64 of the seedling transporting unit 5 are interlocked and connected, the seedling transplanting machine includes the seedling transplanting body 6. And there is an advantage that the drive timing of the seedling transport unit 5 can be easily taken and the drive configuration of the seedling transport unit 5 can be simplified.

  In addition, a lower lateral feed portion 5d for horizontally conveying the seedling container 26 is provided on the lower side of the machine body during the transition from the downward feed portion 5b to the upward feed portion 5c, and planting is supplied to the lower lateral feed portion 5d. Position A is provided. Accordingly, during the transition from the descending feed part 5b to the ascending feed part 5c (in the illustrated example, the section conveyed by the lower right sprocket 58 and the lower left sprocket 357), the seedling container 26 is moved by the lower lateral feed part 5d. The seedling planting body 6 transplants the seedling N, which is transported horizontally on the lower side, and accommodated in the seedling housing body 26 in the field. Therefore, even if the position of the seedling container 26 at the time of planting the seedling planting body 6 to the seedling N due to a shift at the time of assembling or the like, the seedling planting body 6 is moved to the lowest end in the movement path and The seedling N of the seedling container 26 in the same posture can be planted, and the change in the seedling planting state can be minimized.

  On the front side of the seedling conveying unit 5, a seedling mounting table 82 is provided from the first case portion 32 a of the planting transmission case 32 through a seedling mounting table support frame 81. The sweet potato seedlings N are placed on the seedling stage 82 in a state of being accommodated in the accommodation box 116 or the like, and the operator can transfer the seedlings on the seedling stage 82 to the upper lateral feeding part 5a of the seedling conveying part 5. To supply.

  On the rear side of the seedling transport section 5, a transmission lever 83 is provided extending from the position of the transmission case 9 to the rear side so that the transmission mechanism in the transmission case 9 can be switched and the traveling speed of the traveling device 4 can be stepped. . The seedling transplanting machine 1 includes a traveling device 4 that causes the machine to travel to the front, a seedling transport unit 5 that transports seedlings through a predetermined transport path, and a seedling that transplants seedlings transported by the seedling transport unit 5 in a field. Although the planting body 6 and the steering handle 2 are provided at the rear part, it passes through the space surrounded by the upper lateral feed part 5a, the descending feed part 5b and the ascending feed part 5c of the seedling conveying part 5 from the traveling device 4. The shift lever 83, which is an operation lever extending to the rear side of the seedling conveying section 5, is provided. That is, the transmission lever 83 passes through a predetermined loop-shaped conveyance path of the seedling conveyance unit 5.

  A pair of left and right pressure-reducing wheels 84 are provided behind the seedling planting body 6. The pressure wheel 84 is a free wheel, and is configured to suppress the soil above and to the left and right sides of the seedling planted in contact with the soil surface. The pressure wheel support frame is supported from the rear end of the support frame 38. 85 is provided. Therefore, the seedling planting body 6 and the seedling transporting portion 5 that rotate around the input shaft 33 of the third case portion 32c of the planting transmission case 32 are supported by the grounding of the pair of left and right pressure-reducing wheels 84, and the unevenness of the soil surface D is supported. Following this, the seedling planting body 6 and the seedling transporting section 5 are swung to be maintained at a predetermined height with respect to the soil surface D. In addition, since the dead weight of the seedling planting body 6 and the seedling transporting unit 5 acts on the pressure-reducing wheel 84, the pressure-reducing wheel 84 can obtain a sufficient pressure-reducing action. Moreover, as shown in FIG. 1, the suppression wheel 84 is arrange | positioned above the planting locus | trajectory T of the seedling planting body 6, and since the positional relationship of the suppression wheel 84 and the planted seedling N approaches, it becomes close, and the suppression wheel The pressure suppression by 84 can be maintained appropriately and the pressure suppression effect can be obtained favorably.

  As described above, this sweet potato seedling transplanting machine is self-propelled by the traveling device 4 in a state in which the left and right front wheels 8 and the rear wheels 7 straddle the heel, and the upper side feed of the seedling transport unit 5 of the self-propelled body. The sweet potato seedlings N are supplied from an operator behind the left rear wheel 7 to walk the trough valley where the left front wheel 8 and the rear wheel 7 pass through the part 5a. The seedling transport unit 5 transports the supplied seedling N, and the seedling transplanter 6 transplants the seedling N that has been transported to the planting supply position A by the seedling transport unit 5 in the field. The seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transport direction C, and the sweet potato seedlings N are stored in the seedling container 26 in a posture in which the vine t faces in the front-rear direction. The operator supplies the seedling N to the seedling container 26 that is conveyed in the left-right direction on the upper side of the machine body by the upper lateral feed section 5a. The supplied seedling is fixed to the seedling container 26. The seedling container 26 to which the seedlings are supplied is conveyed to the lower side of the machine body by the descending feeding unit 5b following the upper lateral feeding unit 5a. The seedling container 26 that has been transported by the descending feed part 5b is transported upward by the ascending feed part 5c and returns to the transport start end side of the upper lateral feed part 5a. The seedling planting body 6 has its seedling planting action part 6a moved up and down by the drive part, and at the rear end part of the seedling N accommodated in the seedling container 26 which has been conveyed to the planting supply position A by the descending feed part 5b. Acts on the rear side of the seedling container 26 to plant seedlings in the field. At this time, the seedling N is clamped and fixed by the clip 49 of the seedling container 26. Since the clamping force of the seedling planting holder 31 of the seedling planting body 6 is larger than the clamping force of the clip 49, the seedling planting is performed. The vine t of the seedling N is detached from the clip 49 by the body 6 moving the seedling to the rear side along the planting locus T.

  When transplanting this sweet potato seedling, an operator fixes the lower end portion of the seedling vine t to the clip 49 of the seedling container 26 in the upper lateral feed portion 5a of the seedling transporting portion 5 and supplies it. If the lower end of t is supplied in a state of being directed downward, the seedling is transported by the seedling transport unit 5 so that the lower end of the vine t is directed upward at the planting supply position A, and the leaves of the seedling are on the upper side with respect to the vine. Turn to. And a seedling is transplanted in soil with the seedling planting body 6 with the posture. Therefore, since the transporting process of the seedling planting body 6 into the soil is simple, the vines are not easily bent or twisted, and the transplanting accuracy is improved, and the leaves are intensively directed upward with respect to the inclined vines. Can be transplanted with sweet potato seedlings Further, since the pair of seedling planting clamps 31 extending vertically sandwich the lower end of the vine t bent upward in the state of being inclined forward at the planting supply position A, the vine t bent in the direction of the seedling planting clamp 31 It can be in a state close to the vertical direction with respect to the direction of the lower end of the plant, and even if the position of the seedling is slightly deviated at the planting supply position A, it is possible to ensure the clamping and stabilization of the seedling, and to have an appropriate posture It is possible to plant seedlings and to transplant stable seedlings.

  Therefore, since the sweet potato seedlings N can be transplanted in a state where the leaves are intensively directed to the inclined vine t, the transplanted seedling leaves 93 protrude out of the soil and emit light such as sunlight. Light can be received, root growth is vigorous and good growth can be achieved, and sweet potato cultivation can be vigorous. In addition, since the orientation of the leaf 93 relative to the axis of the vine is determined by the orientation of the lower end of the vine t, which is particularly easy to bend, transplantation is facilitated, and the operation of supplying the seedling to the clip 49 can be performed easily. The work efficiency of the seedling supply operation to the seedling container 26 of the worker is improved, and the seedling transport unit 5 can be operated at a high speed so as to improve the transplanting work efficiency. Can be improved.

  In addition, since the above-mentioned sweet potato seedling transplanter has the seedling transport unit 5 arranged on the left and right side (left side) of the handle frame 23, the upper lateral feed unit of the seedling transport unit 5 is provided so that the operator can easily supply the seedlings. If the length 5a is increased to some extent, the seedling transport section 5 protrudes to the left and right sides (left side) of the aircraft to increase the lateral width of the aircraft, and in order to obtain the right and left weight balance of the entire aircraft, the overall weight of the aircraft is reduced. There is a limit. Therefore, by penetrating the handle frame 23 in the loop-shaped transport path of the seedling transport unit 5 and disposing the seedling transport unit 5 closer to the left and right center of the machine body, the left and right width of the machine body can be reduced and configured compactly. As a result, the weight of the entire fuselage can be further reduced, and fuel consumption can be improved.

The walking seedling transplanter has been described in detail above, but a riding seedling transplanter including a seat on which an operator sits may be used. The riding-type seedling transplanter shown in FIG. 10 includes the traveling device 4 including the front wheels 8 and the rear wheels 7 and the steering handle 2 gripped while walking, as in the above-described walking-type seedling transplanter. Seats 120 are provided on the left and right sides of the aircraft, respectively, facing the center of the aircraft, and an operator sitting on the seat 120 supplies seedlings to the seedling supply device 121 inside the seat 120 one by one. The seedlings are dropped and supplied to the planting device 122, and the seedling planting device 122 is configured to plant seedlings in the field. A planting state photographing camera 123 supported from the handle frame 23 is provided at a position near the seedling planting device 122. The planting state of the seedling planted by the seedling planting device 122 is photographed by the planting state photographing camera 123, and the photographed image is output by the image output device 125 near the seat 120 via the cable 124. A person can easily confirm the planting state (planting posture, planting depth, etc.) of the seedling while performing seedling supply work. The planting state photographing camera 123 and the image output device 125 may use a commercially available mobile phone with a photographing function or an image output function. Software may be installed in each mobile phone in advance for output by the mobile phone. In the case of two-person work with the workers seated on the left and right seats 120, two image output devices 125 may be provided corresponding to the two workers. In addition, since the planting state photographing camera 123 can determine that a stock removal has occurred in the planting of the seedling, when the stock removal occurs, the planting operation of the aircraft is automatically stopped automatically. Control to disengage the clutch. Further, since the planting position photographing camera 123 can determine that the planting position of the seedling has shifted in the left-right direction in the field, when the planting position of the seedling has shifted to the left and right, the left and right rear wheels 7 are driven. It is possible to control to automatically correct the advancing direction of the airframe by changing the rotation or by making the front wheel 8 steerable and steering the front wheel 8 .

Side view of sweet potato seedling transplanter Top view of sweet potato seedling transplanter Partially omitted rear view showing the seedling transport section and seedling planting body Rear view showing the drive unit of the seedling transport unit Perspective view showing seedling planting body (A) Side view showing planting locus T with drive arm attached to drive shaft, (b) Side view showing planting locus T with drive arm attached to second drive shaft Perspective view showing clip Rear view showing another seedling container The figure which shows a rotation pressing body ((a) side view, (b) front view) (A) Side view showing a riding type seedling transplanter, (b) A diagram showing an example of a planting state photographing camera and an image output device

1: sweet potato seedling transplanter, 4: traveling device, 6: seedling planting body, 31: seedling planting clamp, 32: planting transmission case, 34: driving arm, 35: driving shaft, 36: support link part, 37: rocking Dynamic link 38: Support frame 39: Support shaft 41: Support part 90: Slide guide 91: Pressing tool 91a: Slide part 91b: Pressing part 91c: Pressing surface 91d: Driver 92: Presser cam, 93: Spring, N: Sweet potato seedling, t: Vine

Claims (2)

The state where the seedlings that have been sandwiched are plunged into the soil in a posture in the front-rear direction while moving forward with the traveling device (4), and are released from the front-rear direction in the soil and then released. In a seedling transplanting machine configured to plant seedlings in a posture in the front-rear direction by a pair of seedling planting clamps (31) that are moved upward to exit from the soil, planting transmission case (32) The upper end portion of the support link portion (36) of the seedling planting body (6) is rotatably connected to the distal end portion of the drive arm (34) attached to the drive shaft (35) of the lower end of the support link portion (36). The front end of the swing link (37) is rotatably connected to the rear portion, the rear end of the swing link (37) is planted, and the rear end of the support frame (38) fixed to the transmission case (32). Rotates on support shaft (39) Supported on standing, provided the pair of seedling planting pincer (31) fixed to the tip portions of the pair of support portions (41) of the planting member (6), upon exiting the operation of planting pincer (31) A pressing tool for pressing the soil between the entry position where the seedling planting clamp (31) enters the soil and the clamping release position where the seedling planting clamp (31) releases the seedling clamping in the soil (from above) 91) is slidably provided on a cylindrical slide guide (90) fixed to the support link portion (36), and the presser (91) is always attached to the upper side between the presser (91) and the slide guide (90). A spring (93) is provided, and the presser (91) is composed of a slide part (91a) inserted into the slide guide (90) and a presser part (91b) in contact with the soil surface, and the presser part (91b) Presser with a convex curved surface on the underside (91c), a driving body (91d) is provided at the connecting portion of the slide portion (91a) and the pressing portion (91b), and the driving body (91d) is supported when the seedling planting clamp (31) is retracted. The presser operation cam (92) fixed to the frame (38) comes into contact with the presser from the lower side, and the presser tool (91) protrudes downward by sliding movement, so that the presser surface (91c) of the presser tool (91). A seedling transplanter characterized in that it is configured to move to the rear side of the aircraft. In the retracted state of the presser (91), a space provided between the seedling planting clamps (31) at a position where the presser part (91b) overlaps the upper parts of the pair of seedling planting clamps (31) in a side view. When the pressing tool (91) protrudes, the pressing part (91b) passes between the tips of the pair of seedling planting clamps (31) in an open state and descends. The seedling transplanter according to claim 1.

Images