JP2007143424A - Multiple row seedling planter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple row seedling planter which properly controls the seedling-planting depth of each planting row in response to the shape of a ridge surface and solves a problem that a conventional multi-row seeding planter can uniform the seedling-planting depth of each planting row on a laterally outside-low ridge surface or a Kamaboko (boiled fish paste)-shaped ridge surface, but can always suitably not control the seedling-planting depth of each planting row, because the shape of the ridge surface is different in response to a ridge-forming process, soil quality or the like, especially because the lateral outside ends of the ridge surface have large inclination angles and have irregular heights. <P>SOLUTION: This multiple row seedling planter is provided with height-changing mechanisms (115) for changing the vertical heights of lateral outside seedling planters (25) on the basis of lateral inside seedling planters (25) of the machine frame. This multi-row seedling planter is disposed with lateral outside seedling planters (25) at positions near the axle (10) of travel wheels (6) on the basis of the lateral inside seedling planters (25) of the machine frame. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of a multi-row planting planting machine in which a plurality of seedling planting bodies are arranged on the left and right.

A plurality of left and right seedling planting bodies arranged vertically along a predetermined planting locus by a vertical movement mechanism with respect to the traveling vehicle body provided with a traveling vehicle body having a traveling wheel composed of a pair of left and right front wheels and a rear wheel In the vertical seedling planting machine, the vertical height of the seedling planting body on the outer side in the left-right direction is set lower than the seedling planting body on the inner side in the left-right direction of the machine body, There is one that does not greatly differ the planting depth of the seedlings of each planting strip. In this seedling planting machine, all seedling planting bodies are arranged behind the front and rear axles and at the same position in the front-rear direction (see Patent Document 1).
JP 2001-299017 A (FIGS. 1 and 7)

  The above-mentioned multi-plant seedling planting machine of the above-mentioned background art can equalize the planting depth of the seedlings of each planting strip with respect to the kamaboko-shaped ridge surface where the outer side in the left and right direction is lowered, but the shape of the ridge surface is Depending on the forming process and soil quality of the cocoon, especially the right and left outer edges of the heel surface have a large inclination angle and the height is likely to vary, and the planting depth of the seedlings of each planting line can be appropriately adjusted. That's not true.

  Then, this invention makes it a subject to aim at optimization of the planting depth of the seedling of each planting row | line adapting to various shapes of a ridge surface.

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is a multi-row planting seedling machine in which a plurality of seedling planting bodies (25) are arranged on the left and right, and a seedling on the outer side in the left-right direction with respect to the seedling planting body (25) on the inner side in the left-right direction of the machine body. A multi-row seedling planting machine provided with a height changing mechanism (115) for changing the vertical height of the planted body (25).

  Therefore, the seedling planting machine according to claim 1 plants seedlings in a plurality of strips by a plurality of seedling planting bodies (25) arranged on the left and right. And by the height change mechanism (115), the right and left direction with respect to the seedling planting body (25) on the inner side in the left and right direction of the machine body so that the planting depth of the seedling of each planting line becomes appropriate according to the shape of the ridge surface The vertical height of the outer seedling planting body (25) can be changed.

  The invention according to claim 2 is a multi-planted seedling planting machine in which a traveling vehicle body (1) provided with traveling wheels (6) is provided and a plurality of seedling planting bodies (25) are arranged on the left and right. A multi-row seedling planting machine in which a seedling planting body (25) on the outer side in the left-right direction is arranged at a position near the axle (10) of the traveling wheel (6) in the front-rear direction with respect to the seedling planting body (25) on the inner side in the direction. It was.

  Therefore, the seedling planting machine according to claim 2 plants seedlings in a plurality of strips by a plurality of seedling planting bodies (25) arranged on the left and right. And since the seedling planting body (25) on the outer side in the left-right direction of the machine body is arranged at a position near the axle (10) of the traveling wheel (6) in the front-rear direction with respect to the seedling planting body (25) on the inner side in the left-right direction, Even if the attitude of the aircraft changes due to unevenness on the soil surface, the amount of change in the vertical height of the seedling planting body (25) on the outer side in the left-right direction can be suppressed, and the planting depth of the seedlings on the planting strip on the outer side in the left-right direction Can be stabilized.

  Therefore, according to the seedling planting machine according to claim 1, the height changing mechanism (115) allows the seedling planting body on the inner side in the left-right direction of the machine body to correspond to various shapes of the cocoon surface depending on the molding process and soil quality of the cocoon. The vertical height of the seedling planting body (25) on the outer side in the left-right direction relative to (25) can be changed, and the planting depth of the seedlings of each planting strip can be optimized.

  In addition, according to the seedling planting machine according to claim 2, the seedling planted by the seedling planting body (25) on the outer side in the left-right direction of the machine body with respect to the outer end part in the left-right direction of the ridge surface having a large inclination angle and the height of which is likely to vary. The planting depth can be stabilized to prevent floating seedlings, and the planting depth of the seedlings of each planting strip can be optimized.

  A seedling transplanter 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 5 is disposed is the front. Then, the right hand side of the worker standing toward the front side of the machine body at the rear part of the machine body is set to the right, and the left hand side is set to the left.

  The seedling planting machine of this example includes a traveling vehicle body 1 that allows the vehicle to travel forward, a steering handle 2 for walking operation provided at the rear of the traveling vehicle body 1, and a seedling planting device 3 for planting seedlings in a farm field. The seedling planting apparatus 3 includes a seedling supply apparatus 4 that supplies seedlings.

  In the illustrated example, the traveling vehicle body 1 rolls forward in front of the engine 5, rear wheels 6 and 6 that are a pair of left and right drive wheels that are driven and rotated by transmission of the power of the engine 5, and the rear wheels 6 and 6. A pair of left and right front wheels 7, 7 that are freely supported are provided.

  A mission case 8 is disposed at the rear of the engine 5, and the mission case 8 has a case portion extending from the left side of the engine 5 to the left side of the engine 5, and this is connected to the left side of the engine 5. The output shaft of the engine 5 enters the case portion and the power is transmitted to the transmission mechanism in the transmission case 8. On the left and right sides of the transmission case 8, the front portions of the transmission cases 9, 9 that are long in the front-rear direction are rotatably attached. Specifically, axle cases 9a and 9a provided so as to be rotatable integrally with the transmission cases 9 and 9 are provided on the inner side of the front body of the traveling transmission cases 9 and 9, and the axle cases 9a and 9a are provided. The transmission case 9, 9 is attached to the left and right sides of the mission case 8 so as to be rotatable. The rear wheels 6 and 6 are mounted on the axles 10 and 10 that protrude toward the rear side of the traveling transmission cases 9 and 9. The tip of the wheel drive shaft extended from the transmission case 8 to the left and right outwards enters the rotational axis X position of the front part of the transmission cases 9, 9. The traveling power passing through the section is transmitted to the transmission mechanism in the transmission cases 9 and 9. The traveling power is transmitted to the axles 10 and 10 on the rear end side of the transmission cases 9 and 9 via the transmission mechanism in the transmission cases 9 and 9, and the rear wheels 6 and 6 are driven to rotate. ing. Axle cases 9a and 9a are provided so that they can be expanded and contracted to the left and right according to the width of the collar. Further, in order to support the axle cases 9a and 9a, the support frames 9b and 9b are fixed to the transmission case 8 in a state of being substantially parallel to the axle cases 9a and 9a, and are attached to the outer ends of the support frames 9b and 9b. The outer portions of the axle cases 9a, 9a are rotatably supported by the fixed support plates 9c, 9c.

  The left and right rear wheels 6 and 6 can be disconnected by left and right side clutches (not shown) provided in the mission case 8. Therefore, when turning the airframe, the left and right rear wheels 6 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 cases 9 and 9 are connected to driving means for rotating up and down so that the rear wheels 6 and 6 are moved up and down using the front side of the transmission cases 9 and 9 as a rotation fulcrum. Specifically, the upper and lower arms 11, 11 are integrally attached to the attachment portions of the transmission cases 9, 9 to the transmission case 8, and the lifting hydraulic cylinder 12 is fixed to the transmission case 8. It is connected to the left and right sides of the connecting body 13 attached to the tip of the piston rod. The left and right sides (right side) are connected by a rod 14, and the other side (left side) is connected by a left / right horizontal control hydraulic cylinder 15 that can be expanded and contracted according to the inclination of the airframe.

  When the lifting / lowering hydraulic cylinder 12 is actuated and the piston rod projects rearward, the left and right arms 11 and 11 are rotated rearward, and accordingly the transmission cases 9 and 9 are rotated downward, and the airframe. Rises. On the other hand, when the piston rod of the lifting hydraulic cylinder 12 moves forward and retracts into the cylinder, the left and right arms 11 and 11 rotate forward, and the transmission cases 9 and 9 rotate upward accordingly. The aircraft moves down. The lifting hydraulic cylinder 12 is actuated by a sensor S 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 S is an operation for detecting the height of the heel surface relative to the airframe. Based on the detection operation of the sensor S, the elevating hydraulic cylinder 12 is operated so that the airframe is at a set height with respect to the height of the heel surface. It is composed. Further, the lifting hydraulic cylinder 12 is operated so as to raise or lower the machine body by an artificial operation of the planting / lifting operation tool L arranged in the vicinity of the steering handle 2. The planting / lifting operation tool L is configured to be able to turn on and off the driving of the seedling planting device 3 and the seedling supply device 4.

Further, when the left / right horizontal control hydraulic cylinder 15 is extended and contracted, the left arm 11 connected to the left / right horizontal control hydraulic cylinder 15 is rotated to make the left rear wheel 6 and the right rear wheel 6 different from each other. Raise the aircraft to the left and right. The left / right horizontal control hydraulic cylinder 15 is configured to operate so that the airframe is horizontally horizontal based on a detection result of a sensor that detects the right / left inclination of the airframe relative to the left / right horizontal.

  The left and right front wheels 7 and 7 are provided with vertically long vertical frames 16a and 16a on left and right side portions of a horizontal frame 16 which is rotatably mounted around an axial center in the front-rear direction at a left and right central position below the engine 5, It is rotatably attached to axles 17 and 17 fixed to the side of the lower end. Accordingly, the left and right front wheels 7 and 7 are capable of rolling around the axial center Y in the front-rear direction at the center of the left and right of the aircraft. Vertical frames 16a and 16a are provided on the left and right sides of the horizontal frame 16 so as to be vertically adjustable so that the height of the front wheels 7 and 7 can be adjusted.

  The steering handle 2 is provided at the rear of the fuselage, and is located behind the axles 10 and 10 of the rear wheels 6 and 6. Specifically, it is attached to the rear end portion of the body frame 2b with the front end portion fixed to the mission case 8. The airframe frame 2b is disposed at a position deviated from the right and left center of the airframe 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 from the rear end portion of the body frame 2b to the left and right, and the rear end portions thereof serve as grip portions 2a and 2a 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.

  In the traveling vehicle body 1, 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 3 has a beak-shaped seedling planting body 25 whose tip is directed downward, and a seedling planting body at a position where the lower end of the seedling planting body 25 is above the field scene and a position below the field scene. A vertical movement mechanism 26 that moves the 25 up and down; a closed state in which the lower end portion of the beak-like seedling planting body 25 is closed and a seedling is received from above and a seedling can be accommodated inside; An open / close mechanism 27 that opens and closes the seedling planting body 25 in an open state in which the seedling that is opened and accommodated inside can be released downward, and the seedling supply device 4 receives a seedling from above and accommodates the seedling inside. The seedling container 29, the moving mechanism 30 that moves the seedling container 29 so as to pass above the seedling planting body 25, and the bottom of the seedling container 29 is opened above the seedling planting body 25. Seedling planting body 2 by dropping seedlings housed inside Comprising a seedling supply device 4 provided with a release mechanism 31 for supplying seedlings.

  The seedling planting device 3 is configured as a multiple row planting in which a plurality of seedling planting bodies 25 positioned on the rear side of the axle 10 of the rear wheel 6 are arranged side by side at set intervals. In this example, it is set as the structure of the four row planting which arrange | positioned the seedling planting body 25 side by side with the set space | interval at a set space | interval.

  The four seedling planting bodies 25 are mounted on the vertical movement mechanisms 26 and 26 provided on both left and right sides of the transmission case 28 mounted on the upper part of the mounting member 32 whose lower part is fixed to the body frame 2b. . The rear ends of the left and right arm portions 25Fa, 25Fa ... extending rearward at the upper part of the front seedling planting body 25F ... of the beak-like seedling planting body 25 ... whose tip is directed downwards are rear seedling planting body support shafts 34. Are attached to the front seedling planting support shaft 33 so that the front end portions of the left and right arm portions 25Ra, 25Ra,... In the front and rear intermediate portions of the arm portions 25Fa, 25Fa ... of the body 25F ... and the arm portions 25Ra, 25Ra ... of the rear seedling planting body 25R ..., the lateral pins 25a, 25a ... provided on the one arm portion are connected to the other side. .. Are engaged in the left and right elongated holes 25b, 25b... Provided in the side arm portion. The left and right ends of the front and rear seedling planting body support shafts 33 and 34 are connected by connecting members 35 and 35. The left and right intermediate portions of the front and rear seedling planting body support shafts 33 and 34 are connected to a cylindrical seedling guide 37 that guides the seedlings into the seedling planting body 25 via seedling guide connecting members 36 and 36, respectively. . Further, the left and right seedling guides 37, 37 are detachably and integrally attached with a connecting shaft 38 extending in the left-right direction, and the left and right seedling guides 37, 37 are connected via the connecting shafts 38, 38. It connects with the connection members 39 and 39 arrange | positioned between right and left. The connecting members 39, 39 connect the tip ends of the upper and lower lift links 40 a, 40 b of the vertical movement mechanism 26 vertically. When the arm portions 25Ra, 25Ra of the rear seedling planting body 25R ... rotate upward around the front seedling planting body support shaft 33, the arms 25Fa, 25Fa of the front seedling planting body 25F ... are connected by the pins 25a, 25a. And the front seedling planting body 25F moves forward by the rotation around the rear seedling planting body support shaft 34, and the rear seedling planting body 25R. By moving around the seedling planting body support shaft 33, it moves rearward, so that the lower side of the seedling planting bodies 25 ... opens back and forth and opens downward. Moreover, the lower part side of the seedling planting body 25 ... opened back and forth is closed by the reverse operation.

  In addition, among the four seedling planting bodies 25, the front seedling planting body 25F and the rear seedling planting body 25R of the two seedling planting bodies 25 on the left and right inner sides are bent rearward and displaced. Conversely, the front seedling planting body 25F and the rear seedling planting body 25R of the two seedling planting bodies 25 on the left and right outer sides are bent forward and displaced. Therefore, the lower end portion of the right and left outer seedling planting body 25 is disposed at a position closer to the front side that is the axle 10 side of the rear wheel 6 in the front-rear direction with respect to the lower end portion of the left and right inner seedling planting body 25. Therefore, the two seedling planting bodies 25 on the left and right sides are configured to plant two seedlings in a staggered manner.

  The seedling guide 37 is a cylindrical body that guides the seedling supplied from the seedling supply device 4 into the seedling planting body 25, and an upper guide 37 a that extends downward from the seedling dropping portion of the seedling supply device 4. Is provided. Thereby, even if the seedling planting body is located at a position shifted from the lower part of the seedling dropping part of the seedling feeding device 4, the seedling dropped and fed from the seedling feeding device 4 can be accurately fed into the seedling planting body 25. .

  The connecting shafts 38 attached to the seedling guides 37 on both the left and right sides of the machine body are supported by the connecting member 39 via height changing mechanisms 115, respectively. The height changing mechanism 115 includes an up-and-down moving member 116 formed of a U-shaped plate as viewed from the rear of the body fixed to the connecting shaft 38, and a U-shaped as viewed from the back of the body so as to surround the up-and-down moving member 116. A base member 117 composed of a plate of a mold, a screw shaft 118 vertically passing through the vertical movement member 116 and the base member 117, and a height change that rotates integrally with the screw shaft 118 at the upper end of the screw shaft 118 And a handle 119. The vertical plate portion 117a extending in the vertical direction of the base member 117 constitutes a connecting member that vertically connects the respective tip portions of the upper and lower lifting links 40a and 40b of the vertical movement mechanism 26. The upper and lower horizontal plate portions 116a of the vertical movement member 116 are positioned between the upper and lower horizontal plate portions 117b of the base member 117, and the horizontal plate portions 116a and 116b of the vertical movement member 116 and the base member 117 are disposed. 117b is overlapped in plan view of the aircraft. The screw shaft 118 is rotatably supported by the upper and lower horizontal plate portions 117b of the base member 117 so as not to move in the axial direction, and is fixed to the upper and lower horizontal plate portions 116a of the vertical movement member 116. The weld nut 120 is screwed. Accordingly, the upper and lower horizontal plate portions 117b of the base member 117 serve as shaft support portions for supporting the screw shaft 118, and the weld nut 120 fixed to the upper and lower horizontal plate portions 116a of the vertical movement member 116 is screwed to the screw shaft 118. It becomes a screwing part to do. Therefore, when the operator rotates the height change handle 119 to rotate the screw shaft 118, the vertically moving member 116 moves up and down along the screw shaft 118 with respect to the base member 117, and the connecting shaft 38 is moved. It is configured to change the height of the seedling guide 37 and the seedling planting body 25 on the outer side in the left-right direction by moving up and down. The vertical movement member 116 is restricted from moving up and down by the upper and lower horizontal plate portions 116a of the member 116 coming into contact with the upper and lower horizontal plate portions 117b of the base member 117, and can move up and down only within a predetermined range. It is configured. The vertically movable range of the vertically moving member 116 is up and down from the height of the seedling planting body 25 on the outer side in the left-right direction to a height that is substantially lower than the seedling planting body 25 on the inner side in the left-right direction. It is set to be able to move.

  The vertical movement mechanisms 26 of the seedling planting bodies 25 are provided on the left and right sides of the transmission case 28. Specifically, the front part is attached to the shaft protruding to the left and right sides of the transmission case 28 fixed to the upper part of the planting part frame 12a that is rotatably attached to the connecting shaft 21 at the rear end part of the lifting link device 2. Upper and lower elevating links 40a and 40b that are mounted so as to be pivotable up and down and have rear portions connected to the seedling planting body 25, a drive shaft 41 that rotates from the side of the transmission case 28, and a drive shaft that rotates. A drive arm 42 attached to one end side of the front end portion 41 so as to rotate integrally therewith, and an interlocking arm 42a rotatably connected to the rotary outer peripheral end portion of the drive arm 42 and the upper lifting link 40a. It is composed. Then, the rear end portions of the upper and lower lifting links 40a and 40b are rotatably attached to a connecting member 39 attached in the vicinity of the left and right intermediate portions of the seedling planting body support shafts 33 and 34. The elevating links 40a and 40b, the transmission case 28, and the connecting member 39 are provided so as to form a link mechanism. Accordingly, when the drive arm 42 is driven and rotated by the rotation of the drive shaft 41, the elevating links 40a and 40b move up and down about the two shafts 40aS and 40bS provided on the left and right side portions of the transmission case 28, and the left and right The seedling planting body 25 ... moves up and down. The lower end portion of the seedling planting body 25 is positioned above the field scene at the ascending position of the vertical movement, and the lower end portion of the seedling planting body 25 is positioned below the field scene at the descending position.

Further, in this seedling planting machine, the vertical movement mechanism 26 for raising and lowering the seedling planting bodies 25.
A first elevating link 40a driven up and down around S, a second elevating link 40b provided below the first elevating link 40a so as to be movable up and down around the second shaft 40bS, the first elevating link 40a and the first It is comprised with the connection member 39 which connects each front-end | tip part of the two raising / lowering links 40b, it is set as the structure which connects this connection member 39 and seedling planting body 25 ..., and raises / lowers the seedling planting body 25 ..., and said 1st axis | shaft 40aS is comprised. The tip of the rotary shaft 40aR that is rotationally driven by the power transmitted through the transmission mechanism in the transmission case 28 is formed in an eccentric state, and the rotation shaft 40aR rotates to center the axis of the rotary shaft 40aR. It is configured to be rotationally driven with the amount of eccentricity as a radius, and the seedling planting body 25 is tilted back and forth during its up-and-down movement by rotating the rotary shaft 40aR during the up-and-down driving of the first lifting link 40a. It is configured. And the attitude | position at the time of the raising of the raising / lowering locus | trajectory upper part of the seedling planting body 25 ... is set so that it may become a forward-facing attitude | position with a lower part rearward from an upper part with respect to an upright attitude | position. Moreover, the posture when the seedling planting body 25 is lowered is set to be a backward posture with the lower portion being forward of the upper portion with respect to the upright posture, and the posture is changed from the backward posture to the forward posture at the lower end position. The seedling planting body 25 is set so that the posture when the seedling planting body 25 is ascending is a forward-facing posture in which the lower portion is rearward of the upper portion with respect to the upright posture.

  The opening / closing mechanism 27 of the seedling planting body 25... Will be described. The end portion of the inner wire 121a of the opening / closing cable 121 at the tip of the rear opening / closing arm part 25Rb. Are connected to the end of the front opening / closing arm 25Fb extending to the front at the top of the front seedling planting body 25F, and the base of the lower lifting link 40b is connected to the end of the outer cable 121b of the opening / closing cable 121. An actuating arm 44 pivotally attached to a shaft 40bS pivotally mounted is provided, and the other end of the inner wire 121a of the open / close cable 121 is connected to the distal end of the actuating arm 44 to open and close the transmission case 28. The other end of the outer cable 121b of the cable for use 121 is fixed and attached. Then, the operating arm 44 receives the action of the cam 46 attached so as to rotate integrally with the rotary shaft 40aR that rotates and drives the shaft 40aS pivotally attached to the base of the upper lift link 40a. It is configured to rotate forward at the set timing. Thus, when the seedling planting body 25 moves up and down by the drive rotation of the drive shaft 41 and reaches the lower end position, the operating arm 44 is rotated forward by the change of the operation position of the cam 46, and the opening / closing cable 121 The inner wire 121a is pulled forward with respect to the outer cable 121b, and the front opening / closing arm portion 25Fb and the rear opening / closing arm portion 25Rb are rotated so that the rear seedling planting body 25R. The front seedling planting body 25F rotates around the seedling planting body support shaft 34 and moves rearward, and the front seedling planting body 25F rotates around the front seedling planting body support shaft 33 and moves forward. The lower side of the planting bodies 25 ... opens back and forth and opens downward. Then, the seedling planting bodies 25 are raised and the operating arm 44 is rotated to the original position (rear side) with respect to the seedling planting bodies 25 by the change of the operation position of the cam 46, and the inner wire of the opening / closing cable 121 is moved. 121a is loosened, and the lower part of the seedling planting body 25 ... opened forward and backward closes. Accordingly, since the seedling planting body 25 is configured to be opened and closed by the opening and closing cable 121, the operating arm 44 has a higher degree of freedom in connection of the opening and closing cable 121 than the conventional opening and closing mechanism using a rod or link. A desired opening / closing amount of the seedling planting body 25 can be obtained with a small amount of operation. The front seedling planting body 25F and the rear seedling planting body 25R are urged to rotate toward the side where the lower part of the seedling planting body 25 is closed by a spring (not shown). Further, a plurality of (two) open / close cables 121 are connected to a common operating arm 44, and a plurality of (two) seedling planting bodies 25 that move up and down synchronously by a common vertical movement mechanism 26 are opened and closed in common. The operation arm 44 is used.

  As shown in FIG. 11, the cam 46 is fixed to the rotary shaft 40aR by a set bolt 122 provided on a boss portion 46a formed integrally. On the opposite side of the cam 46 from the boss portion 46a, a first shaft 40aS that is eccentric with a predetermined eccentricity amount e with respect to the rotary shaft 40aR is provided integrally with the cam 46. The first shaft 40aS is provided so as to be deviated toward the large diameter side of the cam 46 with respect to the rotation shaft 40aR. As a result, the first shaft 40aS can be reliably supported by the cam 46, and the eccentricity e can be increased. Therefore, the forward / backward inclined posture of the seedling planting body 25 and the lifting trajectory can be set as desired. Can do. Further, by loosening the set bolt 122 and replacing the cam 46, the first shaft 40aS having a different eccentricity e can be exchanged. Since the cam 46 and the first shaft 40aS can be exchanged together, the opening / closing timing of the seedling planting body 25 can be changed along with the change of the raising / lowering locus of the seedling planting body 25, These changes can be easily made by attaching and detaching the cam 46, and furthermore, only one of the raising / lowering locus and opening / closing timing of the seedling planting body 25 is changed and the other is forgotten so that the planting becomes inappropriate. You can prevent anything.

  Further, instead of the above configuration, as shown in FIG. 12, the first shaft 40aS may be configured to be detachable from the cam 46 via a flange 123 with a mounting bolt 124. The outer shape of the flange 123 is formed on the inner side of the outer shape of the cam 46. Thereby, when only changing the raising / lowering locus | trajectory of the seedling planting body 25 is desired, it can carry out easily by replacing | exchanging only the 1st axis | shaft 40aS. Incidentally, the hole of the flange 123 through which the mounting bolt 124 passes is formed as a long hole, and the flange 123 can be mounted and fixed by changing the position of the flange 123 with respect to the cam 46. The eccentric amount of the first shaft 40aS It is good also as a structure which can change e easily. Further, if the phase of the first shaft 40aS is changed by changing the mounting position of the flange 123, the change in the front-rear posture change of the seedling planting body 25 at the bottom dead center in the lifting locus of the seedling planting body 25 can be changed. The seedling planting body 25 can be properly planted with a planting hole of a desired size corresponding to a short planting strain. In addition, if it is set as the structure which changes the phase of the 1st axis | shaft 40aS 180 degree | times by changing the attachment position of the flange 123, when planting a seedling while moving the body backward, the raising / lowering locus | trajectory of the seedling planting body 25 is operated in the front-back reverse direction. It can be planted with an appropriate lifting trajectory. At this time, the drive shaft 41 is driven in reverse.

  Between the attachment member 32 for attaching the transmission case 28 to the body frame 2b, and the support frames 9b and 9b for supporting the axle cases 9a and 9a provided between the transmission case 8 and the transmission transmission cases 9 and 9, The support frames 32 a and 32 a are connected to improve the support strength of the transmission case 28, the seedling planting device 3, and the seedling supply device 4.

  Piston rods 91a and 91a of plunger pumps 91 and 91 for supplying water for irrigation supplied to the inside of the seedling planting body 25 are mounted. Plunger pumps 91 and 91 for supplying water for irrigation to be supplied to the inside of the seedling planting body 25... Are mounted inside the transmission case 28 having a gate shape when viewed in the front-rear direction. The piston rods 91a, 91a of the plunger pumps 91, 91 are mounted on the projecting rotary shafts 40aR, 40aR, and the casing members 91b, 91b of the plunger pumps 91, 91 are mounted on the mounting member 32 having the transmission case 28 mounted thereon. It is attached to the plunger pump attachment part provided in T is a tank for storing water for irrigation. Further, a manual pump 101 is provided in the middle of the water supply path (irrigation hose 100) from the tank T to the seedling planting body 25, and the operator operates the manual pump 101 as desired. Water can be supplied to the seedling planting body 25. Accordingly, when the planting operation is interrupted and the mud inside the seedling planting body 25 is dropped and the seedling planting body 25 is washed, or when the plunger pump 91 is malfunctioning, the seedling planting body 25 is appropriately transferred. Convenient to supply water. Since the manual pump 101 is arranged at an upper position near the tank T, the left and right sides of the steering handle 2 are placed on the rear side of the workers sitting on the worker seats 70L and 70R, which will be described later, or the rear wheels 6 and 6. It is arranged at a position close to any of the workers walking outside in the direction and is easy to operate.

  The seedling supply device 4 has a plurality of seedlings that have a cylindrical body 47 that opens up and down and a bottom lid 48 that opens and closes a lower opening 47a of the cylindrical body 47 that are connected in a loop. And a moving mechanism 30 for rotating the seedling container 29 around a long oval loop trajectory before and after the plane of the machine body in a state of passing through the vicinity of the upper part of the seedling planting body 25. It is the structure which provided the open | release mechanism 31 which open | releases the bottom cover 48 ... of the said seedling container 29 ... in the upper position of the seedling planting body 25 ....

The seedling supply device 4 forms a cylindrical outer peripheral portion on the outer periphery of the seedling container 29, and has an engagement portion (round hole) that engages with the cylindrical outer peripheral portion so as to be freely rotatable from the outside. A plurality of connecting bodies 49 for connecting the accommodating bodies 29, 29 are provided, and the engaging portions of the connecting bodies 49 are rotatably engaged with the cylindrical outer peripheral portion of the seedling containing bodies 29, so that the cylindrical outer peripheral portion is rotated. As a state where adjacent seedling containers 29 are rotatably connected, a plurality of seedling containers 29 are connected to each other. That is, it is the structure which connected with the seedling container 29 ... and the connection body 49 ... like an endless chain. Thereby, since this seedling transplanter 29 does not change the space | interval with the adjacent seedling container 29 ... even if the seedling container 29 ... is a part which moves linearly, or a part which moves circularly, from the seedling container 29. The seedling container 29 is less likely to be misaligned with respect to the seedling planting body 25 at the location where the seedling planting body 25 is supplied with seedlings, so that the seedling is properly supplied and the seedlings can be transplanted accurately. After setting the number of seedling containers 29 and the range of circumferential rotation, the upper opening 43b of the seedling container can be formed as wide as possible, and the size of the body can be reduced, while reducing the size of the body. The seedling supply operation can be performed as easily as possible.

  The moving mechanism 30 of the seedling supply device 4 includes sprockets 50, 50; 50 in which the right and left seedling supply devices 4R, 4L are respectively provided with seedling containers 29 ...; 29 ... connected to each other like an endless chain. , 50 is engaged with and wound around an arc-shaped cutout on the outer periphery, and the right and left seedlings are supplied by rotating the left and right sprockets 50, 50; 50, 50 with the power extracted from the transmission case 28. Each seedling container 29 ...; 29 ... of apparatus 4R, 4L is set as the structure rotated around. Rotating shafts 51, 51; 51, 51 for attaching the sprockets 50, 50; 50, 50 so as to be driven to rotate are rotatably attached to a support frame 52 supported by the upper part of the transmission case 28, and from the upper part of the transmission case 28. The left and right rotating shafts 53a and 53b projecting upward are transmitted to the respective rotating shafts 51 and 51; 51 and 51 through sprockets and chains.

  The front and rear shafts 51, 51; 51, 51 around which the seedling containing bodies 29 circulate are located behind the left and right rear wheels 6, 6, and the front shafts 51, 51 around which the seedling containing bodies 29 ... The rear shafts 51 and 51 around which the seedling containing bodies 29 circulate are arranged on the front side of the axles 10 and 10 positions of the wheels 6 and 6 and on the rear side of the axles 10 and 10 positions of the rear wheels 6 and 6. The seedling planting body 25 is arranged on the rear side of the axles 10 and 10 positions of the rear wheels 6 and 6.

  The transmission mechanism in the transmission case 28 rotates from the first bevel gear 54 attached to the input shaft 96 connected to the rear end of the transmission shaft 28a that is rotated by transmission from the transmission case 8 to the transmission shaft 55 extending in the left-right direction. The transmission shaft 55 is transmitted to a transmission shaft 55 via a planting clutch C, which is a fixed position stop clutch having a clutch pawl provided at one end of the second bevel gear and a clutch pawl that is detachable. Be transmitted. The planting clutch C is operated by an operator sitting on the operator seats 70L and 70R operating a lever provided below the seedling supply device 4, and the seedling planting device 3 is driven by turning the clutch C on and off. It is cut off. First sprockets 57 and 57 are attached to both left and right ends of the transmission shaft 55 so as to rotate integrally. The first sprockets 57 and 57 are provided on the lower side in the case extending downward from the left and right ends of the transmission case 28. The second sprockets 58 and 58 are transmitted through the chains 59 and 59. Further, the left and right end portions of the transmission shaft 55 further extend from the first sprockets 57 and 57 and project to the left and right outer sides of the transmission case 28. The protruding portions are drive shafts 41 and 41. The rotary shaft 40aR that rotates integrally with the second sprockets 58 and 58 also protrudes from the left and right outer sides of the transmission case 28, and further, a first shaft 40aS serving as a pivot shaft of the first lifting link 40a in an eccentric state is formed at the tip. And rotate integrally with the rotary shaft 40aR. Further, the third bevel gear 60 is attached to the middle portion of the transmission shaft 55 so as to rotate integrally, and the one rotation shaft 53a that protrudes upward from the upper portion of the transmission case 28 is driven via the fourth bevel gear 61 that meshes with the third bevel gear 60. Rotate. The rotation shaft 53b on the other side is reversely rotated by the gear 62 provided on the rotation shaft 53b meshing with the gear 63 provided on the rotation shaft 53a on the one side. From the left and right rotating shafts 53a, 53b to the left and right rear rotating shafts 51, 51 rotatably supported on the left and right sides of the laterally extending support frame 54b supported by the support member 54a attached to the transmission case 28. Are transmitted through sprockets 65a and 65a; 65b and 65b and chains 65c and 65c, respectively, and from here to left and right front pivot shafts 51 and 51, respectively, sprockets 66a and 66a; 66b and 66b and chains 66c and 66c. It is set as the structure transmitted via.

  The opening mechanism 31 of the seedling supply device 4 is provided with a support 67 that supports the bottom cover 48 from below so that the bottom cover 48 does not rotate downward below the orbit of the seedling container 29. 67 is not provided above the seedling planting bodies 25... So that the bottom lid 48 is unsupported by the support 67 when the seedling container 29 passes above the seedling planting bodies 25. Accordingly, the seedling container 29 is rotated downward to open the seedling so that the seedling can be dropped downward. The timing at which the bottom lid 48 of the seedling container 29 opens is adjusted so that the seedling planting bodies 25... Rise up to just below the seedling container 29. Further, instead of the above configuration, when the seedling planting body rises to just below the seedling container, the opening actuating member provided on the seedling planting body opens the bottom lid of the seedling container that is located above the seedling planting body. It is also possible to adopt a configuration in which the restriction means for restricting the above is operated to release the restriction.

  The seedling supply device 4 includes a right seedling supply device 4R that supplies seedlings to the two seedling planting bodies 25 and 25 on the right side of the machine body, and a left side that supplies seedlings to the two seedling planting bodies 25 and 25 on the left side of the machine body. Both the seedling supply devices 4L are configured to supply seedlings by moving the seedling containers 29 around the two seedling planting bodies 25, 25 in one round. In this way, when the seedling container 29... Moves around the two seedling planting bodies 25, 25 to supply seedlings, the seedling container is supplied to the seedling planting body 25 on one side. A seedling container 29 that is connected so as to alternate between the body 29 and the seedling planting body 29 that is supplied to the other side seedling planting body 29 and that is supplied to the one side seedling planting body 25 is provided. When passing above the seedling planting body 25 on one side, the seedling container 29 to be supplied to fall on the seedling planting body 25 on the other side is set to pass above the seedling planting body 25 on the other side, At least the seedling containers 29 to be supplied to the seedling planting body 25 on the lower side in the circumferential movement direction of the seedling containers 29... Pass above the seedling planting body 25 on the upper side in the circumferential movement direction of the seedling containers 29. When the seedling container 29 is not opened Providing a Unisuru opening regulation means. In addition to the above, if it is configured so that the seedling receiving bodies 29... Move two times while the vertical movement of the seedling planting bodies 25, 25 operates for one cycle, the seedling receiving bodies 29. The seedlings can be supplied simultaneously to the two seedling planting bodies 25 and 25 without passing through the seedlings while passing in series above the two seedling planting bodies 25 and 25, and the two seedling planting bodies 25 and 25 The seedling container 29, which has not been supplied with seedlings after passing above, can be supplied with seedlings to the two seedling planting bodies 25, 25 without leaving the seedlings, and the seedling supply operation can be performed with a margin, And a seedling can be reliably supplied with respect to the two seedling planting bodies 25 and 25. The opening restricting means is provided, for example, with a protrusion on the lid of the seedling container that drops and supplies the seedling planting body on the lower side in the circumferential movement direction of the seedling container, and this protrusion is on the upper side in the circumferential movement direction of the seedling container. When passing above the seedling planting body, it is possible to support from below.

  This seedling planting machine is provided with a soil covering pressure reducing wheel 80 for covering and suppressing the seedlings planted by the seedling planting bodies 25 at positions near the rear left and right sides of the seedling planting locations of each seedling planting body 26. . The soil covering pressure reducing wheel 80 is a rolling wheel, and is supported by a soil covering pressure reducing wheel that is attached to an attachment member 32 fixed to the airframe so as to be rotatable up and down around the rotation fulcrum shaft 82 in the horizontal direction. The frame 102 is attached to the rotating front end side (rear side). In addition, the soil covering pressure reducing wheel 80 of the right and left outer planting strips is disposed in front of the soil covering pressure reducing wheel 80 of the left and right inner planting strip in accordance with the planting position of the seedling. Thereby, regardless of the seedling planting positions that are different in front and back in each planting line, each soil covering pressure reducing wheel 80 covers the seedling immediately after the seedling planting body 25 plants the seedling and suppresses the surrounding soil. Can improve seedling planting accuracy. The soil covering pressure-reducing wheel support frame 102 is U-shaped so that the front side (rotation fulcrum shaft 82 side) is opened in plan view, and is configured by appropriately bending the pipe frame, with the rear end portion slightly upward. It has a shape that stands up. The lower end of the rod 103 extending in the vertical direction is connected to the rear end portion of the soil covering pressure reducing wheel support frame 102 for each planting strip, and the upper ends of the rods 103 (four in total) of each planting strip are set to the left and right. The extending pipe-like left and right frame 104 is penetrated at an appropriate position, and the rod 103 is fixed so as not to slide with respect to the left and right frame 104 by a pin 105 in the front-rear direction. The pin 105 is inserted and fixed in a hole (not shown) provided in the upper end of the rod 103, and a plurality of the holes are provided at predetermined intervals in the vertical direction of the rod 103. Accordingly, by changing the position of the hole of the rod 103 through which the pin 105 is inserted by the rod 103 of each planting strip, the suppression load of the covering soil compaction wheel 80 can be individually changed and adjusted by each planting strip. Depending on the shape of the ridge surface and the characteristics of the soil (such as the characteristics of the soil where the cocoons are liable to collapse), it is possible to properly cover and suppress the surrounding area of the seedling with each planting strip, and the planting of each planting strip can be optimized I can plan.

  The left and right frame 104 is fixed to a rotation arm 107 that rotates back and forth or up and down around a rotation shaft 106 in the left and right direction fixed to the body frame 2b. The pivot shaft 106 extends from the body frame 2b to the left and right, and a pivot arm 107 is provided on each of both ends of the pivot shaft 106. -It is the structure which supported the appropriate position of the mud 104. Further, a plate 108 is fixed to both ends of the rotation shaft 106, and the rotation arm 107 comes into contact with a restricting portion 108a formed by bending the plate 108. The arm 107 is regulated so as not to turn further upward (backward obliquely upward). Therefore, the restricting portion 108a serves as a stopper for the rotating arm 107. Further, a tension spring 109 is provided between a portion 108b formed by bending the plate 108 separately and a rotation arm 107, and the rotation arm 107 is moved downward (by the tension spring 109). It is urged to rotate to the front diagonally lower side. Accordingly, the left and right frames 104 and thus the soil covering pressure reducing wheel 80 are biased downward by the downward biasing of the rotating arm 108, and the soil covering pressure reducing wheel 80 is pressed against the ground with a certain load. It is designed to obtain a squeezing action on the soil. A U-shaped rotation lever 110 is fixedly provided so as to connect the left and right rotation arms 107, and the rotation lever 110 rotates integrally with the left and right rotation arms 107 and 107. It is like that. Accordingly, by turning the turning lever 110, the left and right turning arms 107 are turned to simultaneously move up and down the covering soil pressure reducing wheels 80 of all the planting strips (for a total of four strips). You can also. Accordingly, the soil covering pressure reducing wheel support frame 102, the rod 103, the left and right frames 104, the rotating arm 107, the tension spring 109, the rotating lever 110, and the like constitute a soil covering pressure reducing wheel support mechanism. .

An empty seedling planting lever 111 for driving only the seedling planting device 3 and the seedling supply device 4 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 111. Only the device 3 and the seedling supply device 4 are driven, and the operation of these devices 3 and 4 can be confirmed and inspected. When the empty seedling planting lever 111 is operated to face downward as shown by the solid line in FIG. 1, the seedling planting function is turned off, and the seedling planting is performed while the machine is traveling by the operation of the planting / lifting operation tool L It will be in the state in which the normal planting which operates the apparatus 3 and the seedling supply apparatus 4 can be performed. On the other hand, when the empty seedling planting lever 111 is operated backward as shown by the phantom line in FIG. 1, the empty seedling planting function is turned on and only the seedling planting device 3 and the seedling supply device 4 are in a stopped state. Operates. The empty seedling planting lever 111 is switched on and off when the lever spring (not shown) that biases the lever 111 exceeds the dead point. An engagement hook 112 is provided in the front (lower) portion of the midway portion of the empty seedling planting lever 111, and the engagement hook 112 can engage with a portion extending to the left and right of the rotating lever 110. It has a shape. Accordingly, in the normal planting operation state where the empty seedling planting lever 111 is facing downward (the empty seedling planting function is turned off), the rotating lever 110 reaches the position of the engagement hook 112 by the rising of the soil covering pressure reducing wheel 80. Until the rotating lever 107 comes into contact with the engagement hook 112, the empty seedling planting lever 111 escapes and rotates backward against the forward biasing force of the lever spring. After the lever 110 gets over the protruding portion of the engagement hook 112, the lever 110 is securely engaged and fixed to the engagement hook 112 by urging the lever forward. Therefore, when the soil covering pressure reducing wheel 80 is raised to a predetermined height, the engaging lever 112 fixes the rotating lever 110 and thus the left and right rotating arms 107 so as not to rotate. Min) is covered so that it does not move up and down. When the empty seedling planting function with the empty seedling planting lever 111 facing rearward is on, the engagement hook 112 is separated from the rotation area of the rotation lever 110 and the rotation lever 110 moves up and down to any position. The engagement hook 112 is not engaged. Therefore, the engagement hook 112 constitutes a vertical movement restricting means for fixing the soil covering pressure reducing wheel support mechanism and restricting the vertical movement of the soil covering pressure reducing wheel 80. In addition, the rotation lever 110 can be engaged with the engagement hook 112 by human operation, and the soil covering pressure reducing wheel 80 can also be fixed. It should be noted that the tension spring 109 that urges the left and right pivoting arms 110 downward also acts on the side (lower side) where the pivoting lever 110 is engaged with the engagement hook 112. And engagement of the engagement hook 112 can be ensured.

  In the above-described configuration, the engagement hook 112 can be switched between a regulation state in which the vertical movement of the covering soil pressure reducing wheel 80 and a restriction release state in which the vertical movement of the covering soil pressure reducing wheel 80 is not regulated by the operation of the empty seedling planting lever 111. However, the engagement hook 112 is provided separately from the empty seedling planting lever 111, and a dedicated switching operation tool for moving the engagement hook 112 can be provided to arbitrarily switch between the restriction state and the restriction release state. It is good also as a structure.

In addition, a pressure-reducing roller 81 that suppresses a field scene before the seedling planting body 25.
Is provided at a position in front of the seedling planting portion of each seedling planting body 26. As shown in FIG. 1, the pressure reducing roller 81 is disposed at a front position of the machine body that overlaps with worker seats 70 </ b> L and 70 </ b> R described later in the front-rear direction. Therefore, the weight of the worker sitting on the worker seats 70L and 70R acts on the pressure reducing roller 81 favorably, and a sufficient field scene pressure reducing effect by the pressure reducing roller 81 can be obtained. The pressure-reducing roller 81 is urged downward by the pressure-reducing spring 113 and pressed against the soil. The operator's seats 70L, 70R are caused by the reaction force of the pressure-reducing spring 113 to lift the front part of the machine body. The weight of the worker sitting on the body can be blocked, and the posture of the body can be properly maintained and the planting posture of the seedling can be properly stabilized. In other words, the spring force (crushing load) of the crushing spring 113 can be set large to obtain a desired crushing pressure.

  A guard frame 114 that rises upward is provided at the left and right center of the front end of the machine body. The guard frame 114 serves as a stand that floats the front wheel 7 to the ground when attached to the front end of the machine body downward.

  This seedling planting machine is provided with worker seats 70L and 70R on which an operator sits so that an operator who supplies seedlings to the seedling supply device 4 can get on and perform seedling supply work. Specifically, the left worker's seat 70L is disposed near the left outer side of the front side portion of the left seedling supply device 4L, and the right worker's seat 70R is disposed near the right outer side of the front side portion of the right seedling supply device 4R. It is arranged. The backrests of these seats 70L and 70R are provided so as to be positioned on the outer sides in the left-right direction of the body, and the operator sitting on the seats 70L and 70R faces the front side of the seedling supply devices 4L and 4R. Sit in a facing posture and perform seedling replenishment work on the front sides of the seedling supply devices 4L and 4R. Further, the seedling transplanter of the present example is a seedling supply device while an operator stands and walks forward in the lateral direction outside of the steering handle 2 provided on the rear side of the machine body on the rear side of the rear wheels 6 and 6 traveling in the ridge groove. A work space W that enables the operation of replenishing seedlings is formed on the rear side of the four, and a worker standing in the work space W performs seedling replenishment work on the rear side of the seedling supply devices 4L and 4R. It can be carried out.

  The left and right worker seats 70L and 70R are disposed rearward of the positions of the axles 17 and 17 of the front wheels 7 and 7 and in front of the positions of the axles 10 and 10 of the rear wheels 6 and 6. Further, the operator seats 70L and 70R are arranged so that a part of the seat overlaps above the rear wheels 6 and 6 in a side view of the body. Further, the operator seats 70L and 70R are arranged above the rotation axis X of the traveling transmission case 9, 9 in a side view of the body, and the front wheels 7, 7 are connected to the traveling transmission case 9, It is set as the structure arrange | positioned ahead of 9 rotation axis X.

  The support structure of the worker seats 70L and 70R is such that the axles 10 and 10 of the rear wheels 6 and 6 are protruded inside the transmission cases 9 and 9 which are support members for supporting the axles 10 and 10 of the rear wheels 6 and 6. Even if the axles 10 and 10 of the rear wheels 6 and 6 move up and down on the seat support members 72, 72; , 70R is provided with a posture maintaining mechanism that prevents it from tilting back and forth.

In this example, the posture maintaining mechanism is configured as follows. First, seat support frames 72 and 72 with worker seats 70L and 70R attached to the upper part are provided, and the vertical frames 16a and 16a, which are support members for supporting the axles 17 and 17 of the front wheels 7 and 7, Long connecting frames 73 and 73 are provided before and after connecting the axles 10 and 10 of the wheels 6 and 6. The front end portions of the connecting frames 73 and 73 are fixed to support cylinders 74 and 74 that are rotatable on pins protruded from and fixed to the inner sides of the vertical frames 16a and 16a that support the axles 17 and 17 of the front wheels 7 and 7, respectively. It is inserted slidable in the front-rear direction. Further, the rear end side of the connecting frames 73 and 73 is integrally fixed to cylindrical portions 75 and 75 that are rotatably attached to the axles 10 and 10 of the rear wheels 6 and 6. Therefore, even if the traveling transmission cases 9 and 9 are moved downward and the axles 10 and 10 of the rear wheels 6 and 6 are moved up and down, the connecting frames 73 and 73 are not tilted back and forth. The lower portions of the seat support frames 72, 72 are attached to the middle portions of the connecting frames 73, 73 before and after. Therefore, even if the traveling transmission cases 9 and 9 rotate and the axles 10 and 10 of the rear wheels 6 and 6 move up and down, the operator seats 70L and 70R do not tilt forward and backward. In addition, the seat support frames 72, 72 are rotated around the vertical axis with respect to the connection frames 73, 73, so that the operator seats 70L, 70R can be moved inside the machine body. The operator seats 70L and 70R can be stored inside the fuselage during movement or storage.

The support cylinders 74 and 74 mounted on the front end side of the connecting frames 73 and 73 can be attached to the axles 17 and 17 of the front wheels 7 and 7. Further, the connecting frames 73 and 73 have rear end portions that are rotatable about shafts that protrude inside the traveling transmission cases 9 and 9 that are support members for supporting the axles 10 and 10 of the rear wheels 6 and 6. The cylindrical portions 75 and 75 can also be rotatably attached. Further, the connecting portions on the front wheels 7 and 7 side of the connecting frames 73 and 73 connect the connecting frames 73 and 73 to the front axles 17 and 17 or the vertical frames 16a and 16a in a non-slidable and rotatable manner. The connecting portions on the rear wheels 6 and 6 side of the connecting frames 73 and 73 connect the connecting frames 73 and 73 to the rear wheel axles 10 and 10 or the transmission cases 9 and 9 so as to be slidable and rotatable. It can also be configured. With this configuration, when the traveling transmission cases 9 and 9 rotate downward and the axles 10 and 10 of the rear wheels 6 and 6 descend, the rear wheels 6 and 6 move forward relative to the fuselage. However, the operator seats 70L and 70R do not move in the front-rear direction relative to the aircraft. Accordingly, in order to turn the airframe, the rear wheels 6 and 6 are first lowered to raise the airframe, and when the steering handle 2 is pushed down to bring the two-wheel grounding state and the airframe is turned, the operator seat in the front-rear direction Since 70L and 70R approach toward the axles 10 and 10 of the rear wheels 6 and 6, the load of pushing down the steering handle 2 due to the weight of the operator seats 70L and 70R is reduced. Further, both of the connecting portions on the front wheels 7 and 7 side of the connecting frames 73 and 73 and the connecting portions on the rear wheels 6 and 6 side of the connecting frames 73 and 73 are capable of sliding and rotating the connecting frames 73 and 73. It can also be set as the structure connected to.

  Furthermore, this seedling transplanter is provided with steps 71L and 71R at the lower left and right inner sides of the left and right worker seats 70L and 70R. The steps 71L and 71R extend from the position below the operator seats 70L and 70R to the position above the front wheels 7 and 7, that is, in the vicinity of the front end of the body, as viewed from the side of the body. Therefore, the operator can get on and off the steps 71L and 71R through the front of the machine body. The rear wheels 6 and 6 are large-diameter wheels, and the front wheels 7 and 7 are small-diameter wheels, and are provided so that the front portions of the steps 71L and 71R are located above the front wheels 7 and 7 of the small-diameter wheels in a side view of the body. ing. Steps 71L and 71R have step support frames 92 and 92 with the rear side attached to the upper portions of the axle cases 9a and 9a and the front side fixed to the bumper frame 95 with the inner ends, and the outer ends of the step support frames 92 and 92. It is fixedly mounted on the step support plates 93, 93 which are fixed to the portion and integrated with the support plates 9c, 9c. Accordingly, when the traveling transmission cases 9 and 9 are rotated downward and the rear wheels 6 and 6 are lowered, the body tilts forward and the steps 71L and 71R also tilt forward. It is possible to easily get on and off between the front and the steps 71L and 71R. Further, even if the rear wheels 6 and 6 are lowered, the steps between the ground in front of the fuselage and the steps 71L and 71R do not become so large, so it is possible to get on and off easily.

  Containers C and C capable of storing seedlings to be supplied to the seedling supply device 4 can be installed in the vicinity of the rear sides of the worker seats 70L and 70R and above the axles 10 and 10 of the rear wheels 6 and 6 in a side view of the body. Provided. In this example, container engagement members 94 and 94 are provided which engage with one side of handle holes C1 and C1 formed on both sides of a box-like container C formed of plastic or the like and support the container C. Thus, the containers C and C can be installed, the structure of the container support portion is simplified, and the container support portion does not occupy a large space when the container is not installed. , Weight reduction, and cost reduction. In the specific configuration of the illustrated example, the upper end portions of the container engaging members 94, 94 are bent in a crank shape, and the upper end portions are inserted into the handle holes C1 of the container C from the outside, and the handle holes are formed in the crank-shaped bent portions. Container C can be supported by container engaging member 94 by causing C1 to be pulled. Further, the container engaging member 94 is fixed to the upper part of the seat support frames 72, 72, and is provided to stand on the rear side of the worker seats 70L, 70R. When the operator is seated on the operator seats 70L and 70R when traveling on the road, it also serves as a handrail.

  This seedling planting machine is configured such that water for irrigation can be supplied to the seedling planting body 25 so that irrigation can be performed simultaneously with planting of the seedlings. The tanks T, T; T, T for storing water for irrigation are the left and right tanks provided near the axles 10, 10 of the rear wheels 6, 6 in the lateral direction inside the rear wheels 6, 6 and in the lateral direction of the body. It is provided on the support bases 76 and 76 so that it can be placed on the left and right sides. The tank support bases 76 and 76 are fixed on support members fixed to the connection frames 73 and 73. Furthermore, the tanks T, T; T, T are arranged in the space between the transmission cases 9, 9 and the body frame 2b in the left-right direction inside the body of the transmission cases 9, 9 for traveling and in a plan view of the body. It is placed at a position where the space of the aircraft can be used effectively. Therefore, the airframe can be made compact. Further, since the weight of the tank T for storing water acts near the left and right rear wheels 6, 6, the weight of the tank T surely acts on the rear wheels 6, 6, and the driving propulsion force of the rear wheels 6, 6 is achieved. Since the weight of the tank T arranged on the left and right sides near the traveling wheel (rear wheel) 6 that becomes the turning center of the aircraft when turning the aircraft is difficult to apply a turning drive load, Can be lowered smoothly and can turn smoothly. If the rear wheels 6 and 6 are lowered and the aircraft is raised when the aircraft is turning, the left and right operator seats 70L and 70R approach the left and right rear wheels 6 and 6 in the aircraft plan view. The left and right worker seats 70L and 70R approach the upper part of the central traveling wheel (rear wheel) 6 so that the weight of the left and right worker seats 70L and 70R is less likely to give a turning drive load. The moment in turning the aircraft can be lowered and it can turn smoothly. Further, the weight of the tank T does not significantly affect the pushing load of the steering handle 2 when the aircraft is turning, and the pushing load of the steering handle 2 is set to an appropriate load regardless of the weight of the tank T, that is, the capacity of water in the tank T. Can be maintained, and the turning operability can be improved. Conventionally, tanks and worker seats were placed at the center of the left and right sides of the fuselage, so the tank and worker seats would increase the moment in turning when turning in either direction. May degrade performance. However, as in the present embodiment, the tank T and the operator seats 70L, 70R are distributed to the left and right, and the left and right are arranged and configured so that they overlap or approach each other when viewed from the plane of the airframe when turning. The turning performance can be improved.

  When the worker does not sit on the operator seats 70L and 70R and works while walking in the work space W outside the left and right directions of the steering handle 2 on the rear side of the rear wheels 6 and 6, the operator seat 70L and Since 70R and therefore steps 71L and 71R are unnecessary, tanks T and T; T and T may be placed on the steps 71L and 71R. In particular, when the heel is high and the rear wheels 6 and 6 are on the side where the rear wheels 6 and 6 are lowered, the transmission cases 9 and 9 are rotated downward on the front side. , 6 are positioned forward, and the aircraft tends to tilt rearward with the rear wheels 6 and 6 as fulcrums, and the longitudinal posture of the aircraft tends to become unstable. The T and T are placed on the steps 71L and 71R located on the front side of the tank support pedestals 76 and 76, so that the center of gravity of the entire aircraft can be moved forward, and the attitude of the aircraft can be stabilized. The planting posture can be maintained well, or the aircraft can be prevented from falling backward.

  Further, tanks T placed on the tank support bases 76 and 76 in the position above the axles 10 and 10 of the rear wheels 6 and 6 on the rear side of the body seats 70L and 70R in the side view of the body and in the side view of the body. T; A container C capable of accommodating seedlings to be supplied to the seedling supply device 4 is provided at a position above T and T so as to be installed.

  As described above, the seedling planting machine has a plurality of seedling planting bodies 25, 25, 25, and 25 in the field (4) while traveling forward with a pair of left and right front wheels and a pair of left and right rear wheels straddling the fence. Plant the seedlings. The seedling supply devices 4L, 4R supply seedlings to the seedling planting bodies 25, 25, 25, 25. The operator can perform an operation of sitting on the operator seats 70L and 70R and supplying seedlings to the seedling supply devices 4L and 4R.

  Therefore, this seedling planting machine includes a traveling vehicle body 2 provided with a pair of left and right front wheels 7, 7 and a pair of left and right rear wheels 6, 6, a seedling planting body 25 for planting seedlings in a farm field, and the seedling planting body 25. In the seedling planting machine provided with seedling supply devices 4L and 4R for supplying seedlings to and worker seats 70L and 70R for sitting workers who perform operations for supplying seedlings to the seedling supply devices 4L and 4R, The operator seats 70L, 70R are arranged in the left-right direction of the seedling feeding devices 4L, 4R on the rear side of the axles 17, 17 position of the front wheels 7, 7 and on the front side of the axles 10, 10 position of the rear wheels 6, 6. In the vicinity of the outside, it is provided so as to be seated in the posture toward the inside of the body toward the seedling supply devices 4L and 4R. Accordingly, the operator can easily and efficiently replenish the seedling supply devices 4L and 4R by sitting on the operator seats 70L and 70R in a laterally horizontal posture, and can easily move both forward and backward in the traveling direction of the aircraft. The operator can control the aircraft properly, the operator can get on with peace of mind, the planting state of the seedlings planted in the field can be easily confirmed, and the plant is in an inappropriate planting state Can be carried out quickly and good planting work can be performed. Further, since the weight of the worker seats 70L and 70R and the weight of the worker sitting on the seats act between the front and rear axles 10, 10, 17, and 17 of the front and rear wheels 6, 6, 7, and 7, respectively. The contact pressure of both the front wheels 6 and 6 and the rear wheels 7 and 7 is increased, so that the lifting of the front wheels 7 and 7 is suppressed, so that seedlings can be planted well, and straightness is also improved. Misalignment of the right and left of the seedling planting position is less likely to occur.

  In addition, this seedling transplanter is provided with an engine 5 and a transmission case 8 on the front side of the traveling vehicle body 2, and the front portions of the transmission cases 9 and 9 for traveling long in the front and rear are rotated on the left and right sides of the transmission case 8. The rear wheels 6 and 6 are mounted on axles 10 and 10 which are movably attached and protrude from rear side surfaces of the transmission case 9 and 9 for traveling, and the rear wheels 6 and 6 are moved up and down. The driving means 12 for rotating the transmission cases 9, 9 is connected to the traveling transmission cases 9, 9, and the power in the transmission case 8 is transmitted via the transmission mechanism in the traveling transmission cases 9, 9. The rear wheels 6 and 6 are transmitted to the axles 10 and 10 to drive and rotate the rear wheels 6 and 6, and the steering handle 2 for walking control is provided at the rear of the handle frame 2b connected to the traveling vehicle body 2. Positioned behind the axles 10, 10 of the rear wheels 6, 6 That the mounting state, the operator's seat 70L, a portion of the seat above the rear wheel 6, 6 in the aircraft side view of 70R are disposed so as to overlap. Accordingly, the walking body can be made compact and simplified as a structure. Further, when the vehicle is turned at the end of the field, the operator pushes down the steering handle 2 at the rear of the vehicle and tilts the vehicle to the rear with the axles 10 and 10 of the rear wheels 6 and 6 as fulcrums. The seedling transplanter with this configuration has the operator seats 70L and 70R positioned in front of the axles 10 and 10 of the rear wheels 6 and 6, respectively. Therefore, if the operator is seated on the operator seats 70L and 70R when the steering handle 2 is pushed down, the steering handle 2 cannot be pushed down easily due to the weight of the worker. However, since the operator seated on the operator seats 70L and 70R is getting out of the aircraft when the aircraft is turning, the weight of the operator seated on the operator seats 70L and 70R is large when the control handle 2 is pushed down. There is no load, and when the traveling transmission cases 9 and 9 turn around the front side and lower the rear wheels 6 and 6 before turning the body, the rear wheels 6 and 6 are moved to the front side of the body. The operator seats 70L and 70R are partly overlying the rear wheels 6 and 6 in a side view of the fuselage, so that the steering wheel 2 is pushed down to lower the rear wheels 6 and 6 6 is tilted rearward with the axles 10 and 10 as fulcrums, the operator seats 70L and 70R move relatively rearward. When the steering handle 2 is pushed down, the operator seat 70L and 70R is the rear wheel 6 Go to the vicinity of the axle 10, 10 upper position, the operator seat 70L, load when depressing the steering wheel 2 by weight of 70R is decreased, the turning operation of the machine body can be performed easily.

  In addition, this seedling transplanter is provided with a steering handle 2 for walking control at a position rearward of the axles 10 and 10 of the rear wheels 6 and 6, and the seedling planting body 25 is shaped like a beak with its tip directed downward. As the seedling planting body, when the seedling planting body 25 receives the seedling from above and descends and enters the field, the lower part is opened, the seedling is released to the field, and then the seedling is planted in the field by moving up. The seedling supply device 4 receives a seedling from above and accommodates a plurality of seedling containers 29. The seedling planting body 25 is made to fall around the long oval locus in the direction and is supplied to the seedling planting body 25 on the rear side of the trajectory from above, and the seedling planting body 25 is an axle of the rear wheels 6 and 6. 10 and the rear of the 10 position, the seedling container 29 The front and rear shafts 51, 51 around the left and right rear wheels 6, 6 are on the inner side of the machine body, and the front shaft 51 around which the seedling container 29 circulates is the axles 10, 10 of the rear wheels 6, 6. The rear shaft 51 around which the seedling container 29... Circulates in front of the position is disposed rearward of the axles 10 and 10 position of the rear wheels 6 and 6, and the operator seats 70L and 70R are The steering handle 2 provided in the vicinity of the outer side in the left-right direction of the front side portion of the seedling supply device 4 so as to be seated toward the seedling supply device 4 in an attitude toward the inside of the fuselage, and provided at the rear of the fuselage on the rear side of the rear wheels 6 and 6. A work space W is formed on the outer side in the left-right direction so that an operator can stand and walk forward to replenish seedlings on the rear side of the seedling supply device 4. Accordingly, while the operator seats 70L and 70R are arranged on the left and right outer sides of the seedling supply device 4, the seedling supply device 4 can be formed narrow in the left and right directions, and the machine body can be configured compactly. It is possible to easily and easily replenish seedlings to the front side of the seedling supply device 4 by sitting on the seats 70L and 70R for the workers, so that the operator does not sit on the seats 70L and 70R for the workers in the soft field or the like. , 6 can be easily replenished to the rear side of the seedling supply device 4 while walking along with the progress of the aircraft. Further, the operator seated on the operator seats 70L and 70R supplies the seedlings to the front side of the seedling supply device 4, and the rear wheels 6 and 6 are supplied to the rear side of the seedling supply device 4. An operator who stands on the back side and walks with the progress of the aircraft can replenish seedlings, and can work more easily and efficiently.

  Further, in this seedling transplanter, the front wheels 7, 7 are arranged in front of the rotational axis of the transmission case 9, 9, and the operator seats 70L, 70R are used for the traveling in a side view of the body. The transmission cases 9 and 9 are disposed above the rotation axis X. Accordingly, even if the rear wheels 6 and 6 are moved up and down, it is difficult to contact the operator seats 70L and 70R. Therefore, the operator seats 70L and 70R can be arranged as low as possible, the aircraft can be configured compactly, and the center of gravity of the aircraft can be configured. Can be reduced, the maneuverability of the aircraft is improved, the running stability is improved, and seedlings can be planted well.

  In addition, this seedling transplanter has rear wheels 6 and 6 as large-diameter wheels and front wheels 7 and 7 as small-diameter wheels, and is provided with steps 71L and 71R on the lower side in the left-right direction of the operator seats 70L and 70R. 71L and 71R are extended from the lower position of the operator seats 70L and 70R to the upper position of the front wheels 7 and 7 to the front position of the front wheels 7 and 7 in a side view of the body. Therefore, the operator can easily get on and off the steps 71L and 71R from the front side of the machine body, and can easily and quickly get off from the machine body when reaching the end of the field, and the turning operation of the machine body can be performed easily and quickly.

  This seedling planting machine is provided with a plurality of seedling planting bodies 25 arranged side by side, and the seedling supply devices 4L and 4R are arranged at two places on the left and right sides of the machine body so that the seedling container 29 is in the front-rear direction in a plan view of the machine body. Two are arranged side by side so as to move around along a long oval locus, and the seedlings are supplied to each of the plurality of seedling planting bodies 25 by the right and left seedling supply devices 4L and 4R. Two seats 70L, 70R are provided on the left and right so as to be positioned in the vicinity of the outer sides in the left-right direction of the left and right seedling supply devices 4L, 4R, respectively. Accordingly, seedlings are supplied to each of a plurality of seedling planting bodies 25 provided on the left and right by the left and right seedling supply devices 4L and 4R, so that a plurality of seedlings can be planted at the same time. Since the worker can sit on the operator seats 70L and 70R provided in the vicinity of the laterally outer sides of the devices 4L and 4R, and the seedlings can be replenished to the right and left seedling supply devices 4L and 4R, seedling planting work can be performed efficiently. Further, since the operator seats 70L and 70R are provided on the left and right, the deterioration of the left and right weight balance of the aircraft due to the weight of the operator can be reduced.

  In addition, the seedling transplanter is operatively provided with support members 9 and 9 that support the axles 10 and 10 so that the axles 10 and 10 of the rear wheels 6 and 6 move up and down, and the operator seats 70L and 70R are provided. At least the axles 10 and 10 of the rear wheels 6 and 6 or the seat supporting members 73 and 72 attached to the supporting members 9 and 9 that support the axles 10 and 10, and the seat supporting members 73 and 72 A posture maintaining mechanism is provided to prevent the worker seats 70L and 70R from tilting back and forth even when the axles 10 and 10 of the rear wheels 6 and 6 are moved up and down. Accordingly, the operator seats 70L and 70R are supported by at least the axles 10 and 10 of the rear wheels 6 and 6 or the seat support members 73 and 72 attached to the support members 9 and 9 that support the axles 10 and 10, respectively. The weight of the operator seated on the operator seats 70L and 70R directly acts on the axles 10 and 10 of the rear wheels 6 and 6 or the support members 9 and 9 that support the axles 10 and 10, and the engine 5 and the mission. Since it does not act directly on the case 8, the seedling planting body 25, or the member that supports the seedling supply device 4, the weight of the machine body can be reduced. In addition, the load applied to the driving means 12 that moves the rear wheels 6 and 6 up and down can be reduced, and the vertical movement of the rear wheels 6 and 6 can be operated lightly and smoothly. Furthermore, since the seat support members 73 and 72 are provided with a posture maintaining mechanism that prevents the worker seats 70L and 70R from tilting back and forth even when the axles 10 and 10 of the rear wheels 6 and 6 are moved up and down. The worker's seats 70L and 70R are supported by the axles 10 and 10 of the rear wheels 6 and 6, or the seat support members 73 and 72 attached to the support members 9 and 9 that support the axles 10 and 10. Even if the wheels 6 and 6 move up and down, the operator seats 70L and 70R are not tilted back and forth, so that the stability of the worker when riding is further improved, and the seedling supply device 4 is efficiently replenished. Good and safe.

  Further, the seedling transplanter includes the axles 17 and 17 of the front wheels 7 and 7 or the support members 16a and 16a that support the axles 17 and 17, the axles 10 and 10 of the rear wheels 6 and 6, or the axles 10 and 10. The supporting members 9 and 9 are connected to the supporting members 9 and 9 so as to be rotatable around the axis in the left-right direction and slidably connected in the front-rear direction on either or both of the front wheel side and the rear wheel side. Long connecting frames 73 and 73 are provided at the front and rear of the axles 10 and 10 of the rear wheels 6 and 6 so that the front and rear tilts do not fluctuate. , 70R to which the lower portions of the seat support frames 72, 72 are attached to constitute the posture maintaining mechanism. Therefore, the support mechanism for the operator seats 70L and 70R and the posture maintaining mechanism can be configured in a simple structure, and the weight of the fuselage can be further reduced.

  In addition, the seedling transplanter can accommodate seedlings to be supplied to the seedling supply device 4 in the vicinity of the rear sides of the operator seats 70L and 70R and above the axles 10 and 10 of the rear wheels 6 and 6 in a side view of the body. The container C is provided so that it can be installed. Accordingly, the container C that can store the seedlings to be replenished to the seedling supply device 4 can be installed in the vicinity of the rear side of the operator seats 70L and 70R and above the axles 10 and 10 of the rear wheels 6 and 6 in a side view of the body. , Whether the operator sits on the operator seats 70L, 70R to replenish seedlings or stands on the rear side of the rear wheels 6, 6 to replenish seedlings, the seedling can be easily obtained from the container C. The seedlings can be taken out and replenished to the seedling supply device 4, and work can be performed easily and efficiently. In addition, when the aircraft is tilted around the axles 10 and 10 of the rear wheels 6 and 6 to turn in the two-wheel grounding state, the container C is installed above the axles 10 and 10 of the rear wheels 6 and 6. It is difficult for the seedling stored in the container C to jump out.

  In addition, this seedling transplanter is configured so that water for irrigation can be supplied to the seedling planting bodies 25... And a tank T for storing water for irrigation is disposed on the inner side in the lateral direction of the rear wheels 6 and 6 in the lateral direction of the body. The rear wheels 6 and 6 are provided so as to be placed on tank support tables 76 and 76 provided near the axles 10 and 10 of the rear wheels 6 and 6. Accordingly, since the tank T for storing water for irrigation is placed on the tank support bases 76 and 76 provided near the axles 10 and 10 of the rear wheels 6 and 6 in a side view of the body, the water in the tank T is stored. The load at the time of pushing down the steering handle 2 due to the weight can be reduced, the moment in turning the aircraft can be lowered, and the turning operation of the aircraft can be easily performed.

  Further, this seedling planting machine is configured so that water for irrigation can be supplied to the seedling planting bodies 25... A tank T for storing water for irrigation has axles 10 and 10 for the rear wheels 6 and 6 in a side view of the body. It is provided so as to be able to be placed on tank support tables 76, 76 provided in the vicinity, and is located above the axles 10, 10 of the rear wheels 6, 6 in the side view of the fuselage at the rear side of the operator seats 70 </ b> L, 70 </ A container C capable of accommodating seedlings to be replenished to the seedling supply device 4 is provided at a position above the tanks T placed on the tank support pedestals 76 and 76 as viewed. Accordingly, since the container C capable of storing the seedlings to be supplied to the seedling supply device 4 is provided above the irrigation tanks T placed on the tank support bases 76, 76 so as to be installed, the airframe can be compactly configured. In addition, the seedling in the container C is difficult to jump out during turning operation, and the load when the turning operation is performed by pushing down the steering handle 2 can be reduced, so that the turning operation of the aircraft can be easily performed.

  And this seedling planting machine arrange | positions the soil covering pressure reducing wheel 80 which suppresses it while covering the circumference | surroundings of the seedling planted with the seedling planting apparatus 3 behind the rear wheels 6 and 6, and moves the said soil covering pressure reducing wheel 80 up and down. Engagement tool which provides a cover soil pressure reduction wheel support mechanism that supports freely, and fixes the soil cover pressure wheel support mechanism and restricts the vertical movement of the soil pressure reduction wheel 80 when the soil pressure suppression wheel 80 moves up to a predetermined height. (Engagement hook 112) is provided. Therefore, the soil covering pressure ring 80 follows the field scene satisfactorily by the soil covering pressure ring supporting mechanism, and suppresses the soil around the seedling while covering the periphery of the seedling planted in the field. When the aircraft tilts rearward with the rear wheels 6 and 6 as fulcrums and the soil covering pressure reducing wheel 80 moves up to a predetermined height, the soil covering pressure reducing wheel 80 is automatically fixed by the engagement tool (engagement hook 112). Further, it is possible to prevent the aircraft from falling over the rear wheels 6 and 6 as fulcrums and receiving the weight of the aircraft by the soil covering pressure reducing wheel 80 and the soil covering pressure reducing wheel support mechanism. Therefore, when the soil covering pressure reducing wheel 80 moves up and down in the normal operating range, the soil covering pressure reducing wheel 80 follows the field scene well, and covers the soil around the seedling and suppresses the soil around the seedling. Can be obtained appropriately, and the posture of the planted seedling can be properly maintained. Then, when the aircraft tilts rearward with the rear wheels 6 and 6 as fulcrums and exceeds the normal operating range and the soil covering pressure reducing wheel 80 moves up to a predetermined height, the vertical movement of the soil covering pressure reducing wheel 80 is automatically restricted. The covering soil pressure wheel 80 can prevent the aircraft from falling to the rear side due to its own weight, thereby improving the safety of the planting work.

  Further, at the start of turning of the aircraft, an operator holding the control handle 2 depresses the handle 2 and tilts the aircraft to the rear side, thereby intentionally moving the soil covering pressure reducing wheel 80 and engaging the rotation lever 110. The soil covering pressure reducing wheel 80 can be fixed at a predetermined upward movement position by fixing to the combination tool (engagement hook 112) and fixing the soil covering pressure reducing wheel support mechanism. Thereby, when the aircraft is turning, the covering soil pressure reducing wheel 80 does not get in the way and can be easily turned without interfering with the covering soil pressure reducing wheel 80, so that the turning maneuverability is improved.

  In addition, a restriction state in which the engagement tool (engagement hook 112) is positioned in the rotation region of the rotation lever 110 and the vertical movement of the soil covering pressure reducing wheel 80 is restricted by the engagement tool (engagement hook 112), and the engagement Switching means capable of switching the tool (engagement hook 112) from the rotation range of the rotation lever 110 and switching to a restriction release state in which the vertical movement of the soil covering pressure reducing wheel 80 is not restricted by the engagement tool (engagement hook 112). Provided. Therefore, when the switching means is switched to the restriction release state in which the vertical movement of the soil covering pressure reducing wheel 80 is not restricted, the soil covering pressure reducing wheel 80 follows the field scene well by the soil covering pressure reducing wheel support mechanism, and the soil surrounding the seedlings planted in the field is covered. Then, the soil around the seedling is crushed. On the other hand, when the switching means is switched to a restriction state that restricts the vertical movement of the soil covering pressure reducing wheel 80, the vertical movement restricting means restricts the vertical movement of the soil covering pressure reducing wheel 80, and even if the aircraft tilts rearward, It can prevent the aircraft from falling to the rear side under the weight of the aircraft. Therefore, in a field that is relatively flat and has a small inclination or a large unevenness in the field scene, by switching the switching means to the restriction release state, the soil covering pressure reducing wheel 80 is moved up and down greatly to follow the field scene well. It is possible to improve the soil covering performance around the seedlings and the soil pressure suppression performance around the seedlings, and to optimize the posture of the planted seedlings. On the other hand, in a farm field with a large inclination such as an inclined land, the upper movement of the soil covering pressure reducing wheel 80 is restricted by switching the switching means to the restricted state. Therefore, even if the aircraft is tilted rearward, the soil covering pressure reducing wheel 80 It is possible to prevent the aircraft from falling to the rear side under the weight of the aircraft and improve the safety of planting work.

  And this seedling planting machine arranges a plurality of seedling planting bodies 25 on the left and right, and in a plurality of seedling planting bodies 25 for planting seedlings by synchronously moving up and down by a common vertical movement mechanism 26, the horizontal direction of the machine body A height changing mechanism 115 is provided to change the vertical height of the seedling planting body 25 on the outer side in the left-right direction with respect to the inner seedling planting body 25. Accordingly, the height changing mechanism 115 allows the left and right end portions to be lowered or the left and right end portions to be lowered, and the height change between the left and right central portions and the left and right end portions of the saddle surface. Even if the difference is different, the seedlings on the inner side in the left-right direction of the aircraft are adjusted so that the planting depth of the seedlings of each planting line is appropriate according to the various shapes of the ridges depending on the molding process and soil quality of the cocoons. The vertical height of the seedling planting body 25 on the outer side in the left-right direction with respect to the planting body 25 can be changed, and the planting depth of the seedlings of each planting strip can be optimized. Further, the height change handle 119 allows the operator to easily change the vertical height of the seedling planting body 25 on the outer side in the left-right direction from the rear side of the machine body.

  In addition, among a plurality of seedling planting bodies 25 for planting seedlings by moving up and down in synchronization by a common vertical movement mechanism 26, the seedling planting body 25 on the outer side in the left-right direction with respect to the seedling planting body 25 on the inner side in the left-right direction of the aircraft. The front wheel 7 and the rear wheel 6 are disposed at the front positions near the axles 10 and 17 in the front-rear direction. Therefore, seedlings can be planted in a staggered manner, and even if the attitude of the fuselage changes up and down around the axles 10 and 17 of the front wheel 7 or the rear wheel 6 due to unevenness of the soil surface of the groin, The amount of change in the vertical height of the seedling planting body 25 on the outer side in the direction is suppressed to be smaller than the amount of change in the vertical height of the seedling planting body 25 on the inner side in the left and right direction. The part has a large inclination angle and its height tends to vary, but the seedling planting body 25 on the outer side in the left-right direction of the aircraft can stabilize the seedling planting depth, so that floating seedlings are generated at the left and right ends of the cocoon This can be prevented, and the planting depth of the seedlings of each planting strip can be optimized.

  As shown in FIGS. 13 and 14, the height changing mechanism 115 can be configured in a pantograph manner. The height changing mechanism 115 penetrates the four-side link mechanism 125 that connects four links having substantially the same length in a quadrangular shape, and the front and rear connecting shafts 126 and 127 that are diagonally positioned on the four-side link mechanism 125. A screw shaft 128 in the front-rear direction, and a height changing handle 129 that rotates integrally with the screw shaft 128 at the rear end of the screw shaft 128 are provided. Of the front and rear connecting shafts 126 and 127, one (front side) connecting shaft 126 is screwed with the screw shaft 128, and the other (rear side) connecting shaft 127 rotatably supports the screw shaft 128. Yes. Further, one (upper side) of the upper and lower connecting shafts 130, 38 at the diagonal position of the four-sided link mechanism 125 moves the tip ends of the upper and lower lifting links 40 a, 40 b of the vertical movement mechanism 26 up and down. The other (lower) connecting shaft 38 is fixed to the connecting member 39 to be connected, and is attached to the seedling guide 37 on the outer side in the left-right direction to serve as a connecting shaft for supporting the seedling guide 37. The moving direction of the other (lower) connecting shaft 38 is restricted by a slide guide (not shown) so that it can move only in the vertical direction. Therefore, when the operator rotates the height changing handle 129, the other (lower) connecting shaft 38 is moved in the vertical direction to increase the height of the seedling guide 37 and the seedling planting body 25 on the outer side in the left-right direction. The configuration is changed. Thereby, since the height change handle 129 is located on the rear side of the seedling guide 37 and the seedling planting body 25 and faces the rear, the operator on the rear side of the machine body can easily operate the height change handle 129. .

  The above is a detailed description of the riding seedling transplanter, but a walking seedling transplanter may be used.

Side view of seedling planter Top view of seedling planter Top view of the seedling transplanter with the seedling supply unit, the operator's seat, and a part of the cover soil pressure wheel support mechanism omitted. Rear view of a seedling transplanter with some parts omitted Side view showing seedling planting device and part of seedling supply device Rear view of a seedling planting device with part of the transmission case unfolded and its cross section disclosed Rear view showing the height change mechanism The perspective view which shows the connection structure of a seedling container The perspective view which shows the state which installed the container in the container locking member A perspective view showing a soil covering pressure wheel support mechanism Diagram showing cam and first shaft The figure which shows the cam of another form, and a 1st axis | shaft Plan view showing a pantograph-type height change mechanism Side view showing a pantograph-type height change mechanism

Explanation of symbols

  1: traveling vehicle body, 6: rear wheel, 10: axle, 25: seedling planting body, 115: height changing mechanism

Claims (2)

In a multi-row seedling planting machine in which a plurality of seedling planting bodies (25) are arranged on the left and right, the vertical height of the seedling planting body (25) on the outer side in the left-right direction relative to the seedling planting body (25) on the inner side in the left-right direction of the aircraft A multi-row planting planter provided with a height changing mechanism (115) to be changed. In a multi-row planting seedling machine in which a traveling vehicle body (1) having traveling wheels (6) is provided and a plurality of seedling planting bodies (25) are arranged on the left and right, the seedling planting body (25) on the inner side in the left-right direction of the machine body On the other hand, a multi-planted seedling planting machine in which the seedling planting body (25) on the outer side in the left-right direction is arranged at a position near the axle (10) of the traveling wheel (6) in the front-rear direction.

Images