JP2008086207A - Seedling-planting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling-planting machine for planting seedlings in three or more rows, whose seedling-supplying device is relatively small and light, and which can well maintain workability for supplying the seedlings to a seedling receiver and can reduce or eliminate the differences of mutual distances between planted rows. <P>SOLUTION: A seedling-supplying device 6 includes linear portions 28 extended in the lateral direction of the revolving movement route of the seedling receiver 22 in plan view, and arcuate portions 29 arcuately curved back and forth. Adjacent dropping supply positions 31, 32, 33, 34 are arranged so that the arrangement distances of the adjacent dropping supply positions 31, 32, 33, 34 on the revolving movement route are differentiated, and narrow arrangement distances and wide arrangement distances among the mutual arrangement distances are placed at the linear portions 28 and at the circular portions 29, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  This invention belongs to the technical field of a seedling planting machine for planting three or more seedlings in which three or more seedling plantings are arranged on the left and right.

Conventionally, in a multi-row planting (two-row planting) seedling planting machine, a plurality of (two) seedling planting bodies that are moved up and down with a predetermined movement trajectory by a vertical movement mechanism to plant seedlings in a farm field are arranged on the left and right. A seedling supply device for supplying seedlings to the plurality of seedling planting bodies, wherein the seedling supply device has a plurality of seedling containers for storing seedlings, and the plurality of seedling containers are looped at a predetermined arrangement pitch And a moving mechanism that sequentially moves around so as to pass above each seedling planting body, and when the seedling container is moved to a fall supply position that is above the seedling planting body by the moving mechanism, the seedling body body is accommodated. A seedling fall supply mechanism that drops and supplies seedlings to be dropped to a seedling planted body that has been moved up and down by a vertical movement mechanism, and the seedling fall supply mechanism drops and supplies seedlings at each fall supply position corresponding to each seedling planted body Along with the drop supply for each drop supply position A plurality of (two) seedling containers that contain the seedlings to be provided, each provided with one each of the different seedling containers corresponding to the respective drop supply positions, and adjacent to each other by a circular movement path A seedling storage unit composed of a seedling container is configured, and a plurality of sets of the seedling storage units are moved around the same circular movement path by a moving mechanism, and the circular movement path of the seedling container extends in the left-right direction in plan view. There is a seedling planting machine in which a linear portion and an arc-shaped portion that is bent in an arc shape from the linear portion to the front side or the rear side are provided, and each drop supply position is arranged in the linear portion (Patent Document 1). reference.).
JP 2005-21060 A

  Since the conventional one is a two-row planting, a plurality of fall supply positions can be arranged in a linear portion in the circulation movement path of the seedling container, but in a three- or more-row planting planting machine, If all the drop supply positions are arranged in the linear portion, the linear portion is required to be long, and the circulation path of the seedling container becomes longer in the left-right direction, resulting in a large seedling supply device. . In addition, it is conceivable to provide a plurality of circumferential movement paths for the seedling container on the left and right sides, and to assign and set a plurality of fall supply positions to each of the circumferential movement paths. Not only the entire apparatus becomes enormous, but also the seedling replenishment work must be performed on the seedling container in each of the circular movement paths, and the seedling replenishment workability may be deteriorated. Furthermore, when the arrangement intervals of the fall supply positions adjacent to each other are different due to factors such as the arrangement pitch of the seedling containers, the arrangement of all fall supply positions in the linear portion, Is also different from the arrangement interval.

  Therefore, the present invention makes the seedling supply device relatively small and light, can maintain the seedling supply workability to the seedling container well, further reduces the difference between the planting strips, or this difference. It is an object to construct a seedling planting machine for planting 3 or more seedlings that have been eliminated.

In order to solve the above problems, the present invention has taken the following technical means.
That is, in the invention according to claim 1, three or more seedling planting bodies (20) for moving seedlings in a field by moving up and down with a predetermined operating locus by a vertical movement mechanism (21) are arranged in three or more rows. In the seedling planting machine for planting seedlings, a seedling supply device (6) for supplying seedlings to the three or more seedling planting bodies (20) on the left and right is provided, and the seedling supply device (6) includes a plurality of seedlings A seedling container (22) and a moving mechanism (a plurality of the seedling containers (22) are arranged in a loop at a predetermined arrangement pitch and sequentially moved so as to pass above each seedling planting body (20) ( 23) and the seedling container (22) when the seedling container (22) is moved to the drop supply position (31, 32, 33, 34) that is located above the seedling planting body (20) by the moving mechanism (23). Seedling planted body (20) moved up by vertical movement mechanism (21) A seedling drop supply mechanism (24) for supplying the seedlings, and the seedling drop supply mechanism (24) is a seedling at each drop supply position (31, 32, 33, 34) corresponding to each seedling planting body (20). And a seedling container (22) for storing seedlings to be dropped and supplied corresponding to the respective drop supply positions (31, 32, 33, 34). , 32, 33, 34) comprising a seedling containing unit comprising three or more seedling containing bodies (22), each of which is provided with one each of the different seedling containing bodies (22), and are adjacent to each other by a circular movement path. A linear portion extending in the left-right direction in plan view, configured to move a plurality of sets of the seedling accommodation unit by the moving mechanism (23) along the same circumferential movement path. (28) and front from the linear part (28) Or it is set as the structure provided with the circular-arc-shaped part (29) bend | curved in a circular arc shape on the back side, and while arranging the arrangement space | intervals along the said circular movement path | route of the adjacent fall supply position (31,32,33,34) differently. Each of the drop supply positions (31, 31) is arranged such that a narrow array interval is located in the linear portion (28) and at least a part of the wide array interval is located in the arc-shaped portion (29). 32, 33, 34).

  Therefore, in the seedling planting machine according to claim 1, the plurality of seedling containers (22) for storing the seedlings are moved around by the moving mechanism (23), and each fall supply position ( 31, 32, 33, 34), when the seedling container (22) corresponding to the drop supply position (31, 32, 33, 34) arrives, the seedling planting body (22) below the seedling container (22) 20) The seedling is dropped and supplied to the plant, and the seedling planting body (20) is moved down by the vertical movement mechanism (21) to plant three or more seedlings in the field. It should be noted that three or more seedling containers that are provided adjacent to each other in the circular movement path, each having one of the different seedling containers (22) corresponding to each drop supply position (31, 32, 33, 34). The seedling accommodation unit which consists of (22) is comprised, and a seedling is supplied to a seedling planting body (20) for every moving pitch of the said seedling accommodation unit in a circular movement. And the arrangement | positioning space | interval along the said circular movement path | route of the adjacent fall supply position (31,32,33,34) is varied, and a narrow arrangement | positioning space | interval of the said mutual arrangement | positioning space | interval is a linear part of a circular movement path | route. Since each drop supply position (31, 32, 33, 34) is arranged so that at least a part of the wide array interval located at (28) is located at the arc-shaped part (29) of the orbital movement path, the horizontal direction The difference between the arrangement intervals of the adjacent drop supply positions (31, 32, 33, 34) in FIG. 3 is smaller than the difference between the arrangement intervals of the drop supply positions (31, 32, 33, 34) along the circular movement path. Or can eliminate the difference.

  In the invention according to claim 2, seedling planting from the seedling container (22) only at some of the drop supply positions (31) of the three or more drop supply positions (31, 32, 33, 34). The seedling transplanter according to claim 1, further comprising a guide (36) for guiding the fall of the seedling onto the body (20).

  Therefore, in addition to the operation of the seedling planting machine according to claim 1, the seedling planting system according to claim 2 has a seedling planting body from the seedling container (22) only at a part of the drop supply position (31). By providing a guide (36) for guiding the fall of the seedling to (20), the drop supply position (31) set by factors such as the arrangement pitch of the seedling container (22) and the corresponding seedling planting body When the position in plan view with (20) is slightly different, the seedling dropped and supplied by the guide tool (36) can be guided to the position of the seedling planting body (20).

  Therefore, according to the seedling transplanter according to claim 1, the seedling container (22) can be supplied to the three or more drop supply positions (31, 32, 33, 34) through the same circular movement path, and the seedling supply device (6) can be made relatively small and light, and the seedling supply workability to the seedling container (22) can be maintained well. Further, the difference between the arrangement intervals of the adjacent drop supply positions (31, 32, 33, 34) in the left-right direction is the mutual arrangement interval of the drop supply positions (31, 32, 33, 34) along the circular movement path. Therefore, the difference between the left and right planting strips can be set to be the same or substantially the same.

  Moreover, according to the seedling planting machine of Claim 2, in addition to the effect of the seedling transplanting machine of Claim 1, the fall supply position (31 set by factors such as the arrangement pitch of the seedling container (22) ) And the seedling planting body (20) corresponding to the seedling planting body (20), even if the position in plan view is slightly different, it is possible to guide the seedling dropped and supplied by the guide (36) to the position of the seedling planting body (20), Since this guide (36) is provided only at a part of the drop supply position (31) where it is required, the cost can be reduced.

  A seedling transplanter 1 according to an embodiment of the present invention will be described below. In the following description, the side on which the steering handle 2 is disposed is the rear, and the opposite side, that is, the side on which the engine 3 is disposed is the front. The right hand side is set to the right and the left hand side is set to the left toward the front side of the aircraft.

  The seedling transplanter includes a traveling vehicle body 4 that allows the aircraft to travel forward, a steering handle 2 that is provided at the rear of the traveling vehicle body 4, a seedling planting device 5 that plants seedlings in a farm field, It is set as the structure provided with the seedling supply apparatus 6 which supplies a seedling to the seedling planting apparatus 5. FIG.

  In the illustrated example, the traveling vehicle body 1 is supported by the engine 3, a rear wheel 7 that is a pair of left and right drive wheels that are driven and rotated by transmission of the power of the engine 3, and a rear wheel 7 that is rotatably supported. A pair of left and right front wheels 8 are provided.

  A mission case 9 is disposed on the rear side 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 front portion of a transmission case 10 for traveling long in the front-rear direction is rotatably attached to the left and right side portions of the mission case 9. Specifically, an axle case 11 provided so as to be able to rotate integrally with the transmission case 10 is provided on the inner side of the front body of the transmission case 10 for traveling, and the axle case 11 is provided on both left and right sides of the transmission case 9. The transmission case 10 for traveling is attached to the left and right sides of the transmission case 9 so as to be rotatable. The rear wheel 7 is mounted on an axle 12 that protrudes toward the rear side of the traveling transmission case 10. The tip of the wheel drive shaft extending from the transmission case 9 to the left and right outer sides enters the rotational axis center position of the front part of the transmission case 10 and passes through the traveling part system transmission transmission part in the transmission case 9. Driving power is transmitted to the transmission mechanism in the transmission case 10. The driving power is transmitted to the axle 12 on the rear end side of the transmission case 10 via a transmission mechanism in the transmission case 10 so that the rear wheel 7 is driven to rotate.

  The left and right rear wheels 7 can be disconnected by left and right side clutches (not shown) provided in the mission case 9. Therefore, when turning the airframe, the left and right rear wheels 7 on the inside of the turn can be turned in a non-driven state by the side clutch so as to turn smoothly.

  The traveling transmission case 10 is connected to driving means that rotates up and down so as to move the rear wheel 7 up and down with the front side of the transmission case 10 as a rotation fulcrum. Specifically, an upwardly extending arm 13 is integrally attached to the attachment portion of the transmission case 10 to the transmission case 9, and this is attached to the tip of the piston rod of the lifting hydraulic cylinder fixed to the transmission case 9. It is connected to the left and right sides of the connected body. The left and right sides (right side) are connected by rods, and the other side (left side) is connected by left and right horizontal control hydraulic cylinders that can be expanded and contracted according to the inclination of the fuselage.

  When the lifting / lowering hydraulic cylinder is actuated and the piston rod protrudes rearward of the machine body, the left and right arms 13 are rotated forward, and accordingly, the transmission case 10 is rotated downward to raise the machine body. On the other hand, when the piston rod of the lifting hydraulic cylinder moves forward and retracts into the cylinder, the left and right arms 13 rotate forward, and accordingly, the transmission case 10 rotates upward, and the aircraft body Descends. The lifting hydraulic cylinder is actuated by a sensor 14 that contacts the heel surface and operates in accordance with a change in the vertical distance between the airframe and the heel surface. The operation of the sensor 14 is an operation for detecting the height of the heel surface relative to the airframe. Based on the detection operation of the sensor 14, the lifting hydraulic cylinder is operated so that the airframe is set to the set height with respect to the height of the heel surface. is doing. In addition, the lifting hydraulic cylinder is operated so as to raise or lower the machine body by manual operation of the planting / lifting operation tool 15 arranged in the vicinity of the steering handle 2. The planting / lifting operation tool 15 is configured to be able to turn on / off the driving of the seedling planting device 5 and the seedling supply device 6.

  Further, when the left / right horizontal control hydraulic cylinder expands / contracts, the left arm 13 connected to the left / right horizontal control hydraulic cylinder rotates to move only the left rear wheel 7 up and down to tilt the aircraft to the left and right. Let The left / right horizontal control hydraulic cylinder is configured to operate the airframe to be horizontally horizontal based on a detection result of a sensor that detects a right / left inclination of the airframe relative to the left / right horizontal.

  The left and right front wheels 8 are attached to the left and right sides of a horizontal frame 16 that is pivotally mounted around the axial center in the front-rear direction at the left and right center position below the engine 3, and the vertical frames 17 that are vertically long are attached to the side of the lower end. It is rotatably attached to an axle 18 fixed to the wheel. 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. A vertical frame 17 is provided so as to be vertically adjustable with respect to the left and right side portions of the horizontal frame 16 so that the height of the front wheel 8 can be adjusted.

  The steering handle 2 is provided at the rear part of the fuselage and is located on the rear side of the fuselage with respect to the axle 12 of the rear wheel 7. Specifically, it is attached to the rear end portion of the body frame 19 with the front end portion fixed to the mission case 9. The body frame 19 extends rearward at the left and right center of the body, and extends obliquely rearward and upward from the front and rear intermediate portions. The steering handle 2 extends rearward from the rear end portion of the body frame 19 to the left and right, and each rear end portion serves as a grip portion 2 a of the steering handle 2. The left and right grip portions 2a of the steering handle 2 are set to an appropriate height so that the operator can easily grip the grip portion 2a with his / her hand. In the illustrated example, the grip portion 2a is divided into left and right parts, but the left and right rear end portions of the steering handle 2 may be connected to each other on the left and right sides, and the connecting portion may be used as the grip portion.

  In the traveling vehicle body 4, the traveling drive unit that is grounded and rotated is configured as a four-wheel traveling drive unit including front and rear wheels, but is configured as a crawler traveling drive unit. You can also.

  The seedling planting device 5 has a beak-shaped seedling planting body 20 whose tip is directed downward, and a seedling planting body at a position where the lower end of the seedling planting body 20 is above the field scene and a position below the field scene. A vertically moving mechanism 21 that moves the 20 up and down; a closed state in which the lower end portion of the beak-like seedling planting body 20 is closed and a seedling is received from above and can be accommodated inside; An open / close mechanism that opens and closes the seedling planting body 20 in an open state in which the seedling that is opened and accommodated inside can be released downward, and the seedling supply device 6 receives a seedling from above and accommodates the seedling inside. A seedling container 22, a moving mechanism 23 that moves the seedling container 22 so as to pass above the seedling planting body 20, and a bottom portion of the seedling container 22 is opened at an upper position of the seedling planting body 20 to open the inside The seedlings housed in are dropped into the seedling planting body 20 Comprising a seedling supply device 6 having a release mechanism 24 as a seedling drop supply mechanism for supplying.

  The seedling planting device 5 has a configuration of a plurality of seedlings in which a plurality of seedling planting bodies 20 are arranged side by side at set intervals that are substantially equidistant from side to side. In this example, the seedling planting body 20 has a four-row planting structure in which four seedling planting bodies 20 are arranged side by side at set intervals.

  The four seedling planting bodies 20 are mounted on two vertical movement mechanisms 21 provided on both left and right sides of the transmission case 26 transmitted from the mission case 9. The transmission case 26 is fixed to the upper part of an attachment member 25 whose lower part is fixed to the body frame 19. The vertical movement mechanism 21 is provided with upper and lower lifting links that are attached to the transmission case 26 so that the front part is pivotable up and down and the rear part is connected to the seedling planting body 20. The upper and lower lifting links are moved up and down by power from the transmission case 26 by a separately provided drive mechanism, and the left and right seedling planting bodies 20 are moved up and down. The lower end portion of the seedling planting body 20 is positioned above the field scene at the ascending position of the vertical movement, and the lower end portion of the seedling planting body 20 is positioned below the field scene at the descending position. The opening / closing mechanism of the seedling planting body 20 is operated by the power from the transmission case 26, and in conjunction with the operation of the vertical movement mechanism 21, when the seedling planting body 20 reaches the lowered lower end position, the lower side of the seedling planting body 20 Is opened to the left and right and opened downward, and when the seedling planting body 20 reaches the raised upper end position, the lower side of the seedling planting body 20 is closed and closed.

  Among the four seedling planting bodies 20, the left and right outside seedling planting bodies 20 are located behind the left and right inside seedling planting bodies 20. Further, the left and right vertical movement mechanisms 21 are configured to operate with a phase difference of 180 degrees, so that the right and left outer seedling planting bodies 20 and the left and right other inner seedling planting bodies 20 are the same front and rear in the field. Planting seedlings in the position. Therefore, this seedling planting machine is configured to plant seedlings in four rows in a staggered manner.

  The seedling supply device 6 includes a plurality of seedling containers 22 that have a cylindrical body that opens up and down and a bottom lid 27 that opens and closes an opening on the lower side of the cylindrical body, and that are connected in a loop. A moving mechanism 23 that rotates the container 22 in a counterclockwise direction along a long oval loop in the plan view of the body in a state of passing through the vicinity of the upper part of the seedling planting body 20, and the bottom of the seedling container 22 In this configuration, an opening mechanism 24 that opens the lid 27 at a position above the seedling planting body 20 is provided. The seedling supply device 6 has a cylindrical outer peripheral portion formed on the outer periphery of the seedling container 22, and has an engaging portion (round hole) that engages the cylindrical outer peripheral portion so as to be rotatable from the outside. A plurality of connecting bodies for connecting the containers 22 are provided, the engaging portions of the connecting bodies are rotatably engaged with the cylindrical outer periphery of the seedling container 22, and the adjacent seedling containers are used with the cylindrical outer periphery as a rotation axis. A plurality of seedling containers 22 are connected to each other as a state where 22 is rotatably connected. That is, it is the structure connected like an endless chain by the seedling container 22 and the connection body. As a result, the distance between the seedling container 22 and the seedling planting body 20 from the seedling container 22 does not change because the distance between the seedling container 22 and the adjacent seedling container 22 does not change. The seedling container 22 is less likely to be displaced with respect to the seedling planting body 20 at the location where the seedlings are supplied, so that the seedlings are properly supplied and the seedlings can be transplanted accurately. After setting the number of seedling containers 22 and the range of rotation, the upper opening of the seedling container 22 can be formed as wide as possible, and the seedling supply operation to the seedling container 22 is achieved while making the body compact. Can be performed as easily as possible.

  The moving mechanism 23 of the seedling supply device 6 engages and winds the seedling container 22 that is connected to each other like an endless chain by engaging the arcuate cutouts on the outer periphery of the sprocket 23 provided on the left and right. Each seedling container 22 is configured to rotate around by driving and rotating with the power extracted from the transmission case 26.

  The orbital movement path around which the seedling container 22 circulates includes a linear part extending in the left-right direction in plan view and an arcuate part 29 that bends in an arc from the straight part 28 to the front side or the rear side by the sprocket 23. It is circular and is arranged on the inner side of the aircraft from the left and right rear wheels 7. Further, the seedling planting body 20 is arranged on the rear side of the axle 12 position of the rear wheel 7.

  The opening mechanism 24 of the seedling supply device 6 is provided with a support body 30 that supports the bottom cover 27 from below so that the bottom cover 27 does not rotate downward below the orbit of the seedling container 22, and this support body 30 is used as a seedling. By not providing the planted body 20 above the planted body 20, when the seedling container 22 passes through the upper position of the planted planted body 20, the bottom lid 27 is unsupported by the support body 30 and rotated downward. The seedling container 22 is configured to open the seedling so that it can fall downward. The timing at which the bottom cover 27 of the seedling container 22 is opened is adjusted so that the seedling planting body 20 rises to just below the seedling container 22. Moreover, it replaces with the said structure, and when the seedling planting body 20 raises to just under the seedling container 22, the open | release operating member provided in the seedling planting body 20 is the seedling container 22 located above the seedling planting body 20. It is also possible to adopt a configuration in which the restriction means for restricting the opening of the bottom lid 27 is operated to release the restriction.

  The seedling supply device 6 is configured to supply seedlings by moving the seedling container 22 around the four seedling planting bodies 20 in one turn. Thus, when it is set as the structure which the seedling container 22 moves around once with respect to the four seedling planting bodies 20 and supplies a seedling, the seedlings which fall and supply corresponding to each seedling planting body 20 are set. Each of the seedling containers 22 to be stored is provided, and each of the seedling containers 22 is provided with one seedling container 22, and the seedling container 22 is composed of four seedling containers 22 that are adjacent to each other through a circular movement path. A plurality of sets (six sets) of the seedling storage units are moved by the moving mechanism 23 along the same circular movement path, and a total of 24 seedling storage bodies 22 are moved around. Accordingly, the four drop supply positions 31, 32, 33, and 34 corresponding to the four seedling planting bodies 20 are set on the same circular movement path of the seedling container 22. Further, when the two seedling planting bodies 20 on the left and right sides are moved up to the top dead center position by the vertical movement mechanism 21, each seedling container 22 that drops and supplies to the seedling planting body 20 corresponds to the corresponding drop supply position. When the vertical movement mechanism 21 is operated for a half cycle and the two seedling planting bodies 20 on the other side on the left and right sides move up to the top dead center position, they fall to the seedling planting body 20. Each seedling container 22 to be supplied is configured to reach the corresponding drop supply position at the same time. Strictly speaking, the bottom lid 27 of the seedling container 22 starts to open at a timing before the seedling planting body 20 reaches the top dead center position, and when the seedling planting body 20 reaches the top dead center position, the bottom lid is opened. 27 is set to be surely opened, so that the seedling supply to the seedling planting body 20 is performed appropriately. Therefore, the operation of the vertical movement mechanism 21 of the seedling planting device 5 and the movement of the seedling accommodation unit by the movement mechanism 23 are performed in the same cycle, and the seedling accommodation body 22 moves by two pitches of the arrangement by this half cycle operation. It is the composition to do. Thereby, the seedling container 22 can supply seedlings without causing seedling supply leakage to the four seedling planting bodies 20 while passing through the four drop supply positions 31, 32, 33, 34 in series, In addition, seedlings can be supplied to the seedling planting body 20 without leaving a seedling container 22 in which seedlings are not supplied after passing through the four drop supply positions 31, 32, 33, and 34. The supply work can be performed with a margin, and the seedlings can be reliably supplied to the four seedling planting bodies 20.

  Further, at least when the seedling container 22 that drops and supplies to the seedling planting body 20 on the lower side in the circumferential movement direction of the seedling container 22 passes above the seedling planting body 20 on the upper side in the circumferential movement direction of the seedling container 22. Is provided with an opening mechanism 24 that prevents the seedling container 22 from being opened. The opening mechanism 24 will be described. A protrusion 35 is provided on the bottom lid 27 of the seedling container 22, and the protrusion 35 is provided at a drop supply position on the upper side in the circumferential movement direction from the drop supply positions 32, 33, 34 of the seedling container 22. A support shaft 30 is provided to support from below when passing through 31, 32, 33. The bottom lid 27 is configured to rotate around the pivot point on the lower side in the circumferential movement direction and open from the upper side in the circumferential movement direction. Specifically, as shown in FIG. 3, the shape of the projection 35 of the bottom lid 27 is made different for each seedling container 22 corresponding to each drop supply position 31, 32, 33, 34. Are those that protrude shortly around the circumference of the seedling container 22, those that protrude short inside the circumference of the seedling container 22, those that protrude long inside the circumference of the seedling container 22, and long outside the circumference of the seedling container 22 Four types of protrusions are set in order from those corresponding to the drop supply positions 31, 32, 33, 34 on the upper side (left side) in the circumferential movement direction. On the other hand, the support shaft 30 extends along the circular movement path of the seedling container 29 and extends from the inside to the outside of the seedling container 22 so as to support the protrusion 35 corresponding to the type of the protrusion 35 of the bottom lid 27. It consists of four types with different positions. Accordingly, if the first to fourth drop supply positions 31, 32, 33, and 34 are defined in order from the upper side (left side) in the circumferential movement direction, the third support shaft 30 from the inside of the circumference is provided at the first drop supply position 31. In the second drop supply position 32, the second support shaft 30 from the inside of the circuit is omitted, and in the third drop supply position 33, the first support shaft 30 from the inside of the circuit is omitted. At the position 34, the fourth support shaft 30 from the inside of the circuit is missing. The third support shaft 30 from the inside of the circuit is also missing at the fourth drop supply position 34, and the second support shaft 30 from the inside of the circuit is also missing at the third drop supply position 33, and the third and fourth At the drop supply positions 33 and 34, the second and third support shafts 30 do not hinder the opening of the bottom lid 27 to be opened at the drop supply positions 33 and 34. Note that in the area where all the bottom lids 27 need to be closed for replenishing seedlings, such as the linear portion 28 on the front side of the circulation path, all of the first to fourth support shafts 30 may be arranged. If the common support shaft 30a for supporting the vicinity of the center of the bottom lid 48 is provided, the configuration is simplified.

  In the seedling accommodation unit, first to fourth seedling accommodation bodies 22 are arranged in order from the upper side in the circumferential movement direction corresponding to the first to fourth drop supply positions 31, 32, 33, 34. Further, the interval between the first to fourth drop supply positions 31, 32, 33, and 34 in the orbital movement path of the seedling container 22 is 5 pitches of the array of the seedling containers 22 in order from the upper side in the orbital movement direction, It is set to 3 pitches and 5 pitches. The second and third drop supply positions 32 and 33 are positioned on the linear portion 28 of the orbital movement path, and the first and fourth drop supply positions 31 and 34 are the arc-shaped portion 29 of the orbital movement path and the first portion. The second and third drop supply positions 32 and 33 are located at positions close to the linear portion 28 on the opposite side (front side) to the linear portion 28 where the second and third drop supply positions 32 and 33 are located. As a result, the arrangement intervals of the adjacent drop supply positions 31, 32, 33, and 34 along the circular movement path are made different, and a narrow arrangement interval among the arrangement intervals is located in the linear portion 28. The first to fourth drop supply positions 31, 32, 33, and 34 are set so that at least a part of the wide array interval is located in the arcuate portion 29, and the first to fourth drop supply positions in the left-right direction are set. The intervals between 31, 32, 33, and 34 are set to be substantially the same. In this configuration, the first to fourth drop supply positions 31, 32, 33, and 34 in the orbital movement path are spaced from each other by 5 pitches in the arrangement of the seedling container 22 in order from the upper side in the orbital movement direction. Although the pitch is set to 5 pitches, the pitch is not limited to this, and can be 9 pitches, 7 pitches, and 9 pitches in order. Then, if X = 1 + 4n, Y = 3 + 4m (n and m are integers of 0 or more), the first to fourth drop supply positions 31, 32, 33, and 34 respectively correspond to the seedling containers 22 corresponding thereto. It can be set as the structure which supplies a seedling to the seedling planting body 20. FIG.

  In addition, the first to fourth drop supply positions 31, 32, 34, so that the seedlings can be supplied accurately at the upper positions of the corresponding seedling planting bodies 20 at the second to fourth drop supply positions 32, 33, 34. 33 and 34 are set slightly shifted to the upper side of the orbital movement with respect to the left and right center of the orbital movement path. Therefore, there is a possibility that the first drop supply position 31 is slightly shifted from the corresponding position of the seedling planting body 20 at the left end and the seedling planting body 20 cannot be properly supplied with seedlings. Accordingly, a seedling shooter 36 serving as a guide for guiding seedlings from the seedling container 22 toward the seedling planting body 20 is provided only at the first drop supply position 31. Thus, by providing the seedling shooter 36 only at a part of the drop supply positions 31, the weight of the machine body and the cost can be reduced. The seedling shooter 36 is provided so as to be inclined in the circumferential movement direction (backward) of the seedling container 22, and does not interfere with the opening operation of the bottom lid 27 that is opened from the upper side in the circumferential movement direction. Although the seedling shooter 36 is disposed in the same direction as the tilt, the seedling shooter 36 can be smoothly guided on the seedling shooter 36. In addition, the seedling shooter 36 is supported from the frame on the seedling supply device 6 side and is not provided on the seedling planting device 5 side, so without increasing the weight of the portion moved up and down by the vertical movement mechanism 21, The vertical movement of the seedling planting body 20 can be performed smoothly.

  In this seedling planting machine, a soil covering pressure reducing wheel 37 for covering and covering the seedling planted by the seedling planting body 20 is provided in the vicinity of each of the rear left and right sides of the seedling planting location of each seedling planting body 20. The soil covering pressure reducing wheel 37 is a rolling wheel, and is supported by a soil covering pressure reducing wheel which is attached to the mounting member 25 fixed to the machine body so as to be rotatable up and down around the rotation fulcrum shaft 38 in the horizontal direction for each planting line. The frame 39 is attached to the rotating front end side (rear side). The soil covering pressure reducing wheel support frame 39 is U-shaped so that the front side (the rotation fulcrum shaft 38 side) is opened in a plan view, and is configured by appropriately bending a pipe frame. The lower end of the rod 40 extending in the vertical direction for each planting strip is connected to the rear end portion of the covering soil pressure wheel support frame 39, and the upper ends of the rods 40 (four in total) of each planting strip are moved to the left and right. The extending pipe-shaped left and right frames 41 are penetrated at appropriate positions, and are fixed so that the rod 40 does not slide with respect to the left and right frames 41 with pins in the front-rear direction. In addition, although it is the structure which inserts and fixes the said pin to the hole (not shown) provided in the upper end part of the rod 40, the said hole is provided with two or more by the predetermined space | interval of the up-down direction of the rod 40. Therefore, by changing the position of the hole of the rod 40 through which the pin is inserted by the rod 40 of each planting strip, the suppression load of the covering soil compaction wheel 37 can be individually changed and adjusted by each planting strip. Depending on the shape of the surface and the characteristics of the soil (such as the characteristics of the soil where the straw tends to collapse), it is possible to properly cover and suppress the surrounding area of the seedlings with each planting strip, so that the planting of each planting strip can be optimized.

  The left and right frame 41 is fixed to a rotating arm 43 that rotates back and forth or up and down around a rotating shaft 42 in the left and right direction fixed to the body frame 19. The pivot shaft 42 extends from the body frame 19 to the left and right, and pivot arms 43 are provided on both ends of the pivot shaft 42, respectively. -It is the structure which supported the suitable position of the mud 41. A U-shaped rotation lever 44 is fixedly provided so as to connect the left and right rotation arms 43, and the rotation lever 44 rotates integrally with the left and right rotation arms 43. It is like that. Accordingly, by turning the turning lever 44, the left and right turning arms 43 are turned to simultaneously move up and down the covering soil pressure reducing wheels 37 of all the planting strips (for a total of four strips). You can also. Therefore, the soil covering pressure reducing wheel support frame 39, the rod 40, the left and right frames 41, the rotating arm 43, the rotating lever 44 and the like constitute a soil covering pressure reducing wheel supporting mechanism.

  An empty seedling planting lever 45 for driving only the seedling planting device 5 and the seedling supply device 6 is provided in the vicinity of the steering handle 2 without driving the aircraft, and seedling planting is performed by the empty seedling planting lever 45. Only the device 5 and the seedling supply device 6 are driven to confirm and check the operation of these devices 5 and 6. As shown in FIG. 1, when the empty seedling planting lever 45 is operated to face downward, the empty seedling planting function is turned off, and the seedling planting device 5 is operated while the body is traveling by the operation of the planting / lifting operation tool 15. And it will be in the state which can perform the normal planting which operates the seedling supply apparatus 6. FIG. On the other hand, when the empty seedling planting lever 45 is operated so as to face backward, the empty seedling planting function is turned on, and only the seedling planting device 5 and the seedling supply device 6 operate in a stopped state.

  This seedling planting machine 1 is provided with a worker seat 46 on which an operator sits so that an operator who supplies seedlings to the seedling supply device 6 can get on and perform seedling supply operations. Specifically, an operator seat 46 is disposed rearward at the center of the left and right sides of the machine body on the front side of the seedling supply device 6. The operator sitting on the seat 46 is seated in a rearward-facing posture toward the front side portion of the seedling supply device 6, and in front of the front side portion of the seedling supply device 6, in particular, on the front side of the circulation path of the seedling container 22. A seedling replenishing operation is performed on the portion 28. In addition, the seedling transplanter 1 of the present example has a seedling supply device 6 while an operator stands and walks forward in front of the steering handle 2 provided on the rear side of the body on the rear side of the rear wheel 7 that travels in the ridge. A work space W that enables a work for replenishing seedlings is formed on the rear side of the rear, and a worker standing in the work space W can perform seedling replenishment work on the rear side of the seedling feeding device 6. it can. In addition, a seat frame 47 extending in a substantially horizontal direction for supporting the seat 46 is provided, and the seat 46 is configured to be able to rotate rearward around a pivot point on the rear side with respect to the seat frame 47, A fuel tank refueling cap 48 located in the vicinity of the seat frame 47 is in a lower position. As a result, when refueling the fuel tank, the seat 46 is rotated rearward, a replenishment tank for storing the fuel is placed in the seat frame 47, and the fuel tank is easily refilled with a manual pump or the like. be able to.

  Steps 49 are provided on the rear side and the left and right sides of the worker seat 46. This step 49 extends from the position below the operator seat 46 to the position above the front wheel 8, that is, near the front end of the machine body as viewed from the side of the machine body. Therefore, the operator can get on and off the step 49 through the front of the machine body. The rear wheel 7 is a large-diameter wheel, and the front wheel 8 is a small-diameter wheel, and is provided so that the front side portion of the step 49 is located above the front wheel 8 of the small-diameter wheel in a side view of the body. When the traveling transmission case 10 is rotated downward to lower the rear wheel 7, the airframe tilts forward and the step 49 also tilts forward, so that the operator can move between the front of the airframe and the step 49. You can get on and off easily. Even if the rear wheel 7 is lowered, the step between the ground in front of the fuselage and the step 49 does not become so large, so it is possible to get on and off easily.

On the left and right sides of the operator's seat 46, seedling platforms 50 capable of accommodating seedlings to be supplied to the seedling supply device 6 are provided above the axle 12 of the rear wheel 7 in a side view of the body.
As described above, the seedling planting machine 1 travels forward in a state in which the pair of left and right front wheels 8 and the pair of left and right rear wheels 7 straddle the fence, while the seedling planting body 20 is staggered in four rows in the field. Plant. The seedling supply device 6 supplies seedlings to the seedling planting body 20. The operator can perform an operation of sitting on the operator seat 46 and replenishing the seedling supply device 6 with seedlings.

  In the above description, in the distance between the first to fourth drop supply positions 31, 32, 33, and 34 in the circulation path of the seedling container 22, the distance between the left and right outer portions is X pitch, and the left and right center. Assuming that the interval between the parts is Y pitch, if X = 1 + 4n, Y = 3 + 4m (n and m are integers of 0 or more), the first to fourth drop supply positions 31, 32, 33, and 34 respectively Although it has been disclosed that seedlings can be supplied from the corresponding seedling container 22 to the seedling planting body 20, the first to fourth may be used even if X = 2 + 4n, Y = 3 + 4 m. It can be set as the structure which supplies a seedling to the seedling planting body 20 from the corresponding seedling container 22 in the fall supply position 31, 32, 33, 34, respectively. Therefore, when a circular arc portion is located at the center of the left and right of the orbital movement path of the seedling container 22, a staggered spacing in the front-rear direction is obtained in the case of desired planting strips or staggered planting according to the orbital movement path. It is only necessary to set the distance between the first to fourth drop supply positions 31, 32, 33, and 34 in the circular movement path.

  In the above description, the two right and left pairs of seedling planting bodies 20 operate with a half-cycle phase shifted, and the first and second drop supply positions 31 and 32 and the third and fourth drop supply positions 33 and 34 In the above description, the timing of arrival of the seedling container 22 for supplying the seedlings that fall is different. However, all the seedling planting bodies 20 are operated synchronously, and the seedlings are simultaneously fed to all the fall supply positions 31, 32, 33, and 34. It is good also as a structure which supplies. At this time, the distance between the drop supply positions 31, 32, 33, and 34 may be X = 2 + 4n, Y = 1 + 4m or X = 3 + 4n, Y = 1 + 4m.

  Further, in the above description, the protrusion 35 of the bottom lid 27 protrudes short on the outer periphery of the seedling container 22, protrudes short on the inner periphery of the seedling container 22, and protrudes longer on the inner periphery of the seedling container 22. Although the four types of the thing and the thing which protrudes long on the outer circumference of the seedling container 22 have been described in order from the one corresponding to the drop supply position on the upper side (left side) in the circumferential movement direction, according to this configuration, The bottom lid 27 is opened only once at the drop supply positions 31, 32, 33, and 34 in the circular movement, and then the bottom cover 27 does not close until the fourth drop supply position 34 is reached. On the other hand, when the seedling is replenished at the arc-shaped portion 29 or the rear linear portion 28 of the circulation path, it is easy to identify the seedling container 22 that needs to be replenished, and the seedling replenishment workability is improved. Further, according to this configuration, a support shaft is added so that the bottom lid 27 does not open at the second and third drop supply positions 32 and 33, and the vertical movement mechanism 21 of the seedling planting device 5 is activated. If the operating speed of the moving mechanism 23 is doubled, seedlings will be supplied only at the first and fourth drop supply positions 31, 34, and a wide two-row planting between the planting strips will be performed. Can do. Moreover, even if it is not this order, as shown, for example in FIG. 5, what protrudes shortly inside the circumference | surroundings of the seedling container 22, what protrudes short outside the circumference | surroundings of the seedling container 22, the circumference | surroundings of the seedling container 22 It is set in the order of the one that protrudes long inside, the one that protrudes long outside the circumference of the seedling container 22, or the one that protrudes short inside the circumference of the seedling container 22, as shown in FIG. The one that protrudes long inside the circumference, the one that protrudes short outside the circumference of the seedling container 22, and the one that protrudes long outside the circumference of the seedling container 22 are set in this order, or as shown in FIG. Set in the order of one projecting shortly around the circumference of the seedling, one projecting short inside the circumference of the seedling container 22, one projecting long outside the circumference of the seedling container 22, one projecting long inside the circumference of the seedling container 22 May be. In other words, of the protrusions 35 protruding on the same side, the long supply protrusions may be arranged in any order as long as the drop supply position is arranged on the lower side in the circumferential movement direction.

  Further, as shown in FIGS. 8 and 9, the types of projections 35 of the bottom lid 27 include one that protrudes inwardly, two that protrudes inwardly, one that protrudes outwardly in the periphery, It is possible to adopt a configuration in which there are four types, one projecting two outward, and each support plate 51 having a groove that matches the four types of projections instead of the support shaft. At this time, any order may be used as long as the drop supply positions of the protrusions 35 protruding on the same side are arranged on the lower side in the circumferential movement direction. Further, as shown in FIG. 10, a closing support member 52 for lifting and closing the opened bottom lid 27 from below and a closing maintenance support member 53 for supporting the already closed bottom lid 27 in the circular movement path. In the case of overlapping, if the part 53a of the support member 53 for maintaining the closure is made of an elastic body such as rubber or a rotating mechanism and can be moved upward, the support member 52 for closing is closed. The bottom lid 27 to be closed can be closed while pushing up a part 53a of the closing maintenance support member 53, and the closing maintenance support member 53 can be kept out of the way when the bottom lid 27 is closed.

  Further, as shown in FIG. 11, the protrusions 35 of the bottom lid 27 are composed of a protrusion protruding at a high position and a protrusion protruding at a low position. It can also consist of things. According to this, as shown in FIG. 12 (a), the protrusion 35a protruding at a high position is supported by the high support shaft 30a but not supported by the low support shaft 30b, and as shown in FIG. 12 (b), The protrusion 35b protruding at the lower position is not supported by the higher support shaft 30a, but is supported by the lower support shaft 30b, and the order of the drop supply positions corresponding to the protrusions 35a and 35b in the circumferential movement direction may be any first. .

  Further, as shown in FIG. 13, there are four types of bottom lids 27: those without projections 35, those having projections 35 on the outer circumference, those having projections 35 on the inner circumference, and those having projections 35 on both sides of the circumference. It may be configured. At this time, as shown in FIG. 14, it is necessary to set the first drop supply position 31 having no projection 35 and the fourth drop supply position 34 having projections 35 on both the inside and outside of the circuit.

Side view of seedling planter Top view of seedling planter The figure which shows protrusion of a bottom lid The figure which shows the relationship between the projection of the bottom lid and the support shaft The figure which shows the relationship between the protrusion of another bottom cover, and a support shaft The figure which shows the relationship between the protrusion of another bottom cover, and a support shaft The figure which shows the relationship between the protrusion of another bottom cover, and a support shaft The figure which shows the protrusion of other bottom lids The figure which shows the relationship between the protrusion of another bottom cover, and a support plate The figure which shows another support member The figure which shows the protrusion of other bottom lids The figure which shows the relationship between the protrusion of another bottom cover, and a support shaft The figure which shows the protrusion of other bottom lids The figure which shows the relationship between the protrusion of another bottom cover, and a support shaft Illustration showing seedling shooter

Explanation of symbols

  6 ... Rear wheel (running wheel), 80 ... Soil cover pressure wheel, 110 ... Rotating lever, 112 ... Engagement hook (upward movement restricting means)

Claims (2)

In the seedling planting machine for planting three or more seedlings by arranging three or more seedling planting bodies (20) that move up and down along a predetermined operating locus by a vertical movement mechanism (21) and plant seedlings in a field, A seedling supply device (6) for supplying seedlings to three or more seedling planting bodies (20) on the left and right is provided. The seedling supply device (6) includes a plurality of seedling containers (22) for storing seedlings, A moving mechanism (23) for arranging the seedling containers (22) in a loop with a predetermined arrangement pitch and sequentially moving them around each seedling planting body (20), and the moving mechanism (23) When the seedling container (22) is moved to the drop supply position (31, 32, 33, 34) which is the upper position of the seedling planting body (20), the vertical movement mechanism (21 ) The seedling fall supply mechanism (2 The seedling drop supply mechanism (24) supplies and supplies seedlings at each drop supply position (31, 32, 33, 34) corresponding to each seedling planting body (20). A seedling container (22) that accommodates seedlings to be dropped and supplied corresponding to the supply positions (31, 32, 33, 34) is provided separately to correspond to the respective drop supply positions (31, 32, 33, 34). A seedling containing unit comprising three or more seedling containing bodies (22) that are provided with one each of the separate seedling containing bodies (22) to be adjacent to each other by a circular movement path is formed by a moving mechanism (23). A plurality of sets of the seedling accommodation units are moved around the same circulation movement path, and a linear part (28) extending in the left-right direction in the plan view of the circulation movement path of the seedling container (22) and the linear part ( 28) Arc shape that bends in an arc from the front side to the rear side And the arrangement intervals of the adjacent drop supply positions (31, 32, 33, 34) along the circular movement path are made different from each other, and the arrangement is narrow among the arrangement intervals. The seedlings in which the drop supply positions (31, 32, 33, 34) are arranged so that the interval is located in the linear portion (28) and at least a part of the wide array interval is located in the arc-shaped portion (29). Transplanter. Only at some drop supply positions (31) of the three or more drop supply positions (31, 32, 33, 34), the seedlings are dropped from the seedling container (22) to the seedling planting body (20). The seedling transplanter according to claim 1, further comprising a guide (36) for guiding.

Images