JP2014239670A - Seedling transplanter - Google Patents

Abstract

An object of the present invention is to securely hold a seedling vine to be planted deeply in the soil by securely holding a seedling vine with a seedling planting clamp, and also to insert a seedling into the cocoon from the multifilm even when a multifilm is laid on the cocoon. The challenge is to create a seedling transplanter that can be planted on the plant. In a seedling transplanting machine provided with a seedling planting device for clamping a seedling of a seedling transporting part to a machine traveling by a traveling device with a seedling planting clamping tool 31 for raising and lowering the seedling and inserting the seedling into a cocoon, the seedling transplanting tool 31 is provided. The seedling transplanting machine is characterized in that the facing interval of the clamping portion 31b is narrowed toward the tip in the clamping state. [Selection] Figure 8

Description

  The present invention relates to a seedling transplanting machine for transplanting vine-shaped seedlings such as sweet potato seedlings to cocoons.

  A traveling device having left and right front wheels and left and right rear wheels, a seedling transport unit comprising a seedling transport belt for transporting seedlings, and a seedling planting device for planting seedlings transported to a planting supply position by the seedling transport unit in a field A steering handle disposed at the rear end of the aircraft, and the seedling planting device is configured to drive and rotate a pair of left and right seedling planting clamps that clamp the seedling at the planting supply position by a crank arm and a swinging link. A seedling transplanting machine is known that is operated with a long trajectory back and forth and is configured to plant seedlings in a field (Patent Document 1).

JP 2003-284410 A

  The seedling transplanter of the seedling transplanter has a pointed tip and a flat surface, sandwiches the seedling vine and inserts it into the soil as it is, but the seedling vine is large and small, and sufficient clamping force is obtained. In some cases, the seedlings may fall out of the seedling-holding clamp during planting and fail to plant.

  In addition, when a multi-film is laid on the cocoon, the multi-film floats up and is disturbed when the seedling planting clamp is inserted into the heel surface, so that the seedling planting state becomes poor and the seedling rooting is poor. It may be.

  In this invention, the vine of the seedling to be planted is securely clamped with the seedling planting clamp and planted deeply in the soil, and even when the multifilm is laid on the heel, the seedling is inserted and securely planted so as not to disturb the multifilm. It is a problem to make it a seedling transplanter.

The problems of the present invention are solved by the following technical means.
The invention described in claim 1 is a seedling transplanting machine provided with a seedling planting device 6 for planting a seedling in a seedling transporting unit 5 on a machine body traveling by a traveling device 4 with a seedling planting clamping tool 31 that lifts and lowers the seedling and inserting the seedling into a basket. The seedling transplanting machine is characterized in that the spacing between the clamping portions 31b of the seedling planting clamping tool 31 is narrowed toward the tip in the clamping state.

  The invention described in claim 2 is characterized in that a multi-presser 130 for pressing the multi-film on the heel from the left and right is provided in the body at a position where the seedling planting clamp 31 inserts the seedling into the heel. A seedling transplanter.

The invention according to claim 3 is the seedling transplanting machine according to claim 2, wherein the multi presser 130 abuts against the seedling planting clamp 31 and vibrates.
The invention according to claim 4 is characterized in that the cutting blade 30 protruding upward is provided in the clamping part 31b of the seedling planting clamping tool 31. A seedling transplanter.

  In the invention according to claim 1, the seedling vine of the seedling transporting part 5 is sandwiched between the vines by the clamping part 31 b of the planting clamping tool 31 and is inserted into the soil of the straw together with the clamping part 31 b. Since the opposing interval of 31b becomes narrow toward the front end, even if the vine is large or small, it is firmly clamped at the front end portion of the sandwiching portion 31b and can be planted well without being detached.

  In the invention according to claim 2, since the seedling sandwiched by the planting clamp 31 is inserted into the soil while the multifilm on the heel is pressed, the seedling is surely planted deeply without the multifilm floating. It is done.

  In the invention according to claim 3, when the multi presser 130 abuts against the planting clamp 31 and vibrates, the soil under the multifilm is softened so that the seedling planting clamp 31 holding the seedling is deep in the soil. It becomes easy to be inserted.

  In the invention according to claim 4, the sandwiching part 31 b of the seedling planting sandwiching tool 31 prevents the seedling and the multifilm from coming into contact with each other when the seedling is inserted into the basket laid with the multifilm, thereby preventing the seedling and the multifilm from coming into contact with each other.

Side view of seedling transplanter Sensor top view Top view of seedling transplanter Front view showing the front wheel rolling mechanism Side view showing the elevating mechanism of the guide wheel easily Partial cross-sectional plan view showing planting transmission case, seedling planting device, etc. Side view partially omitted showing planting transmission case, seedling planting device, etc. Top view showing seedling transplant Cross-sectional side view showing seedling transplant The top view which shows the attachment structure of a seedling planting clamping tool Enlarged view showing the guide to prevent misalignment of the seedling transplant Side view showing the trajectory and movement trajectory of bottom planting (A: Maximum time between planted stocks, B: Minimum time between planted stocks) Side view showing trajectory and movement trajectory of diagonal planting (A: maximum time between planted stocks, B: minimum time between planted stocks) Side view showing earthen ring and pressure ring Rear view of fixed hook Plan view showing earthen ring and pressure wheel Partial cross-section rear view showing earthen ring Rear view showing seedling transport section Plan view showing the left seedling planting clamp Side view showing left seedling planting clamp Perspective view showing multi-presser The perspective view which shows the multi presser of another Example. Side view with front wheel cover attached to front wheel Front wheel cover development Front view of the front wheel mounting part of another embodiment

  As an embodiment of the present invention, a seedling transplanter for transplanting sweet potato seedlings will be described. The following embodiment is merely an embodiment and does not restrict the scope of the claims. In the present specification, the left and right directions in the forward direction of the work vehicle are referred to as left and right, respectively, the forward direction is referred to as front, and the reverse direction is referred to as rear.

  As shown in FIG. 1 and FIG. 3, a seedling transplanting machine 1 for transplanting sweet potato seedlings includes a seedling transport unit 5 for transporting sweet potato seedlings to a machine equipped with a traveling device 4 and a steering handle 2, and a seedling transporting unit 5. And a seedling planting device 6 for planting the transported seedling in a field. The traveling device 4 includes an engine 3, a pair of left and right rear wheels 7 that are driven and rotated by transmission of the power of the engine 3, and a pair of left and right front wheels 8 that are rotatably supported in front of the rear wheel 7. It is assumed.

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

  The upper and lower arms 12 are integrally attached to the left and right transmission cases 10 to the transmission case 9 so that the left and right arms 12 and the lifting hydraulic cylinder 13 fixed to the transmission case 9 are fixed. The left and right side portions of the balance rod 14 attached to the tip end of the piston rod so as to be rotatable around the vertical axis are connected via connecting portions. The right connecting portion is composed of a rod urged by a compression spring, and the left connecting portion is composed of an extendable left / right horizontal control hydraulic cylinder 16 to eliminate left / right swing play.

  When the elevating hydraulic cylinder 13 is actuated and the piston rod protrudes rearward of the machine body, the left and right arms 12 are rotated rearward, and accordingly, the transmission case 10 is rotated downward to raise the machine body. On the contrary, when the piston rod of the lifting hydraulic cylinder 13 is retracted forward, the left and right arms 12 are rotated forward, and accordingly, the transmission case 10 is rotated upward, and the aircraft is lowered.

  The lifting hydraulic cylinder 13 is configured to operate the airframe to be a set height with respect to the height of the upper surface of the airframe based on the detection result of the sensor 17 that detects the height of the upper surface of the airframe. It is also configured to operate so as to raise or lower the aircraft by human operation of the planting lift lever 18 disposed in the vicinity of the steering handle 2. In addition, the said plant raising / lowering lever 18 can perform on / off operation of the drive of the seedling planting apparatus 6 and the seedling conveyance part 5. FIG. Further, on the side of the planting elevating lever 18, a main clutch lever 19 that can operate the main clutch in the mission case 9 to turn on and off the traveling device 4 is provided.

  As shown in FIG. 2, the sensor 17 has a plate-shaped main grounding portion 17a with a large left-right width and a bar-shaped sub-grounding portion 17b with a small left-right width extending rearward from the main grounding portion 17a. The height of the surface is detected, and the main grounding portion 17a and the sub grounding portion 17b are integrally rotated up and down to detect the height of the farm scene. The main grounding portion 17a is disposed on the front side of the seedling conveying unit 5, and the sub grounding portion 17b is shifted to the left and right center position of the main grounding portion 17a and the left and right side (left side) of the planting supply position A. And it is arrange | positioned in the downward position of the raising feed part 5c of the seedling conveyance part 5 by the body side view.

  Further, when the left / right horizontal control hydraulic cylinder 16 is extended and contracted, the left transmission case 10 is rotated up and down to move the left rear wheel 7 up and down, and the aircraft is tilted left and right. The left / right horizontal control hydraulic cylinder 16 is configured to operate the airframe horizontally so as to be based on the detection result of a pendulum type left / right tilt sensor that detects the left / right inclination of the airframe relative to the left / right horizontal.

  The left and right front wheels 8 are, as shown in FIG. 4, lower end portions of arm portions 21 that extend below the left and right side portions of the front wheel support frame 20 that are pivotally attached around the axial center in the front-rear direction at the left and right central positions below the engine 3. It is rotatably attached to a front axle 22 fixed to the wheel. Accordingly, the left and right front wheels 8 are capable of rolling around the longitudinal center of the left and right center of the aircraft.

  Further, by inserting a rolling restricting tool 60 that is a restricting pin capable of restricting rolling rotation of the front wheel support frame 20 into a hole provided in the frame part on the airframe side and the front wheel support frame 20, the front wheel support frame 20 is It can be fixed in a state where there is no difference in the left and right height with respect to the machine body, and it is possible to improve the heel following ability and straightness in an inclined land or a farm with a step on the left and right. When the normal front wheel support frame 20 is rolled, the rolling restricting tool 60 is inserted only into a spare hole on the front wheel support frame 20 side.

As another example of the support structure of the front wheel 8, it can be configured as shown in FIG.
The motor 25 is attached to the upper end of the arm portion 21 by screwing the arm portion 21 into the screw boss portion 20a of the front wheel support frame 20 with the arm portion 21 as a screw shaft, and inserting the guide rod 24 into the guide receiver 20b provided on the side portion of the screw boss portion 20a. The arm portion 21 is turned so that the vertical position of the front wheel 8 can be changed. If the angle of the guide rod 24 received by the guide receiver 20b can be changed, the toe-in angle of the front wheel 8 can be changed.

  On the front side of the front wheel support frame 20, as shown in FIG. 5, a eaves guide support shaft 62 extending in the left-right direction from the front wheel support frame 20 via an eaves guide support plate 61 is rotatably supported. The left and right heel guide wheels 64 are supported via left and right heel guide support frames 63 extending forward from the heel guide support shaft 62. The heel guide wheel 64 is an idle wheel, and has a well-known configuration that guides the body to run following the heel by contacting the side surface of the heel. An interlocking cable 65 is connected between the piston rod of the lifting hydraulic cylinder 13 and the rod guide support shaft 62.

  The piston rod and the interlocking cable 65 are connected to each other through an accommodation mechanism such as a compression-type accommodation spring 66, and the interlocking cable 65 and the like are prevented from being damaged by a mechanical lock or the like. When turning the airframe, when the left and right rear wheels 7 are moved downward to raise the airframe to the highest position, the interlocking cable 65 is interlocked as the piston rod of the lifting hydraulic cylinder 13 moves rearward. As a result, the rod guide support shaft 63 rotates and the left and right rod guide support frames 63 move upward, and the left and right rod guide wheels 64 rise with respect to the airframe.

  The steering handle 2 is attached to the rear end portion of the handle frame 23 whose front end portion is fixed to the mission case 9. The handle frame 23 is disposed at a position biased to the right from the center of the left and right sides of the fuselage and extends rearward. The handle frame 23 extends obliquely rearward and upward from the front and rear intermediate portion, and extends rearward from the rear end portion of the handle frame 23 to the left and right. The rear end portions are 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.

The seedling planting device 6 includes a seedling planting clamp 31 and a seedling transplanting unit having a mechanism for opening and closing the seedling planting device 31 and a link mechanism R for operating the seedling transplanting unit.
As shown in FIGS. 6 to 13, the seedling planting clamp 31 includes a shaft portion 31 a that is attached to the clamp device holder 41, and a plate-shaped sandwiching portion 31 b that holds a seedling formed at the tip of the shaft portion. The clamping part 31b is fixed to the position near the inner end in the left-right direction of the shaft part 31a by welding, the triangular cutting blade 30 is fixed on the clamping part 31b in a side view, and the clamping part 31b is a multi-film. The multi-film is cut off when it is inserted and withdrawn so that the seedling vine does not come into contact with the multi-film.

  The drive unit that drives the link mechanism R of the seedling planting device 6 is provided in a planting transmission case 32 that includes a transmission mechanism that receives power for driving the link mechanism R from the transmission case 9 and transmits it. The planting transmission case 32 has a front portion connected to the rear portion of the transmission case 9 and extending rearward and obliquely upward therefrom, and a first case portion 32a fixed to the upper left portion of the first case portion 32a and extending leftward. It has two case parts 32b and a third case part 32c that is fixed to the left end of the second case part 32b and extends obliquely downward.

  The power is transmitted into the first case portion 32a by the input shaft 67 in the front-rear direction to which power from the transmission case 9 is transmitted. The transmission mechanism in the first case portion 32a will be described. The transmission is transmitted from the input shaft 67 to the first shaft 70 in the left-right direction via the pair of bevel gears 68, and from the first shaft 70 to the first drive sprocket 71 and the first chain 72. And a planted clutch shaft that is transmitted to the second shaft 69 via the first driven sprocket 73 and serves as a transmission shaft from the second shaft 69 via the second drive sprocket 74, the second chain 75 and the second driven sprocket 76 ( The third shaft 77 is configured to transmit to the planting clutch 78 on the 77.

  The planting clutch 78 is a known configuration that is a fixed position stop clutch that cuts off transmission at a predetermined phase, and stops the seedling planting device 6 at a predetermined phase (position) before holding the seedling to be taken out. If the planting clutch 78 is in the transmission state, the planting clutch 78 and the planting clutch shaft 77 rotate integrally. On the other hand, the timing extraction cam 81 is driven and rotated via the inter-shaft transmission mechanism 80 having a plurality of sets (three sets) of constant speed gear pairs with different transmission ratios from the second shaft 69, and the timing extraction cam 81 is driven by the timing extraction arm 82. At this time, when the timing extraction arm 82 rotates, the restriction of the planting clutch 78 to the non-transmission position by the timing extraction arm 82 is released, and the planting clutch 78 enters a transmission state and rotates once.

  When the planting clutch 78 makes one rotation, it is again regulated by the timing extraction arm 82 and becomes in a non-transmission state. The inter-stock transmission mechanism 80 selectively selects one of a plurality (three sets) of constant speed gear pairs by means of the inter-stock speed change slide key 83, and the timing take-out cam is transmitted by the transmission of the selected constant speed gear pairs. 81 is driven. Accordingly, the driving speed of the timing extraction cam 81 is switched by selecting a constant speed gear pair having a different transmission ratio, and the planting stock 78 is switched between the planting stocks by switching the timing at which the planting clutch 78 is in the transmission state.

  The planting clutch shaft 77 extends from the first case portion 32a to the third case portion 32c through the second case portion 32b. The transmission mechanism in the third case portion 32c will be described. The planted clutch shaft 77 is transmitted to the fourth shaft 86 via a pair of constant speed transmission gears 84 or an inconstant speed transmission gear 85 which is a pair of eccentric gears. Note that the transmission switching mechanism 87 that selectively switches the transmission gear to the pair of constant speed transmission gears 84 or the pair of inconstant speed transmission gears 85 has a pair of constant speed transmission gears 84 and a pair of pairs on the fourth shaft 86. It is constituted by a switching clutch provided between the inconstant speed transmission gear 85.

  Therefore, the transmission switching mechanism 87 is configured to switch between a constant speed transmission state that is transmitted at a constant speed on a transmission path to the seedling planting device 6 and an inconstant speed transmission state that is transmitted at a non-uniform speed. The fourth shaft 86 is transmitted to the planting drive shaft (fifth shaft) 91 via the third drive sprocket 88, the third chain 89, and the third driven sprocket 90, and the seedling planting device 6 is transmitted by the planting drive shaft 91. The drive arm 34 mentioned later of this link mechanism R is driven, and it is the structure which the seedling planting apparatus 6 drives.

  The third case portion 32c is provided so as to be rotatable in the vertical direction around a planting clutch shaft 77 which is an input shaft of the third case portion 32c. The seedling planting device 6 and the seedling transporting portion 5 are provided as follows. The third case portion 32c is provided so as to be rotatable up and down with the traveling device 4 as a reference.

  A support frame 38 that is fixed to the third case portion 32c and extends rearward is provided, and the link mechanism R of the seedling planting device 6 is driven and rotated by transmission from within the third case portion 32c. And a swing link 37 that connects the rear end portion of the support link portion 36 to the support frame 38. The drive arm 34 rotates clockwise as viewed from the left side of the machine body. The seedling transplanting part supported by the support link part 36 operates, and the seedling planting clamp 31 at the tip part (rear end part) of the seedling transplanting part enters the soil from substantially above and moves downward in the soil. While moving, it moves backward to the bottom dead center position, and moves upward to move out of the soil while moving forward while passing near the locus on the upper side of the locus moved backward. It is done, and it moves by drawing the long locus | trajectory T back and forth.

  The trajectory T is a motion trajectory (static trajectory) drawn by the seedling planting clamp 31 with respect to the aircraft, and the motion trajectory drawn by the seedling planting clamp 31 with respect to the field when the aircraft travels forward is a motion trajectory. Trajectory T ′.

  The seedling transplanting part that moves integrally with the support link part 36 is fixed to the pair of holding tool holders 41 connected to the connecting shaft 40 supported by the support link part 36 and the tip part of the holding tool holder 41, and the seedlings. Are formed of a pair of seedling planting clamps 31 and a bearing 42b provided on the side opposite to the seedling planting clamps 31 of the clamp holder 41. When the protrusion 43a provided on the side surface of the opening / closing cam 43 comes into contact with the bearing 42b, the distance between the pair of seedling planting clamps 31 is widened. In other words, the pair of holding tool holders 41 rotate around the connecting shaft 40 so that the interval between the pair of seedling planting holding tools 31 is widened.

  Accordingly, the pair of seedling planting clamps 31 are configured to clamp the seedling by the opening / closing cam 43 or release the clamping. A tension spring 44 is provided between the pair of holding tool holders 41, and the pair of seedling planting holding tools 31 are biased by the tension spring 44 toward each other. In addition, dimples are provided on the opposing surfaces of the seedling planting clamp 31 to make it easier to clamp the seedling.

  The opening / closing cam 43 is fixed to the distal end side of the drive arm 34 and rotates integrally with the drive arm 34. Therefore, when the opening / closing cam 43 rotates, the projecting portion 43a of the opening / closing cam 43 comes into contact with the bearing 42b near the bottom dead center of the planting locus T (movement locus T ′) and a pair of seedling planting clamps The bearing 42b passes the projection 43a at the timing when the seedling planting clamp 31 reaches the planting supply position A, and the tension spring 44 between the pair of clamp holders 41 moves. The lower end of the vine of the sweet potato seedling in the planting supply position A (the rear end of the sweet potato seedling is directed in the front-rear direction at the planting supply position A) is moved in the direction in which the tip is closed by being biased. .

  Then, the seedling planting clamp 31 holds the seedlings up to the bottom dead center of the planting trajectory T (planting trajectory T ′) by the rotation of the drive arm 34 while the seedlings are clamped by the seedling planting clamp 31. The front and rear postures are tilted forward so that the tip moves backward while being embedded inside, and the protrusion 43a of the cam 43 comes into contact with the bearing 42b again in the vicinity of the bottom dead center to sandwich a pair of seedlings. The tip of the tool 31 is opened, and the seedling that has been sandwiched is released and transplanted into the soil.

  Note that by changing the attachment phase of the opening / closing cam 43 in the drive arm 34, the timing at which the seedling planting clamp 31 releases the seedling can be changed. Therefore, while confirming the planting state, the length of the seedling planting clamp 31 for inserting the seedling vine into the soil can be adjusted as appropriate, and planting accuracy can be improved. By changing the mounting phase of the opening / closing cam 43, the timing at which the seedling planting clamp 31 clamps the seedling is also changed, but the timing is set so as not to hinder the seedling clamping at the planting supply position A. .

  In addition, it changes by exchanging the opening-and-closing cam 43 or the protrusion 43a etc., and only the timing at which the seedling planting clamp 31 releases the seedling clamping is changed without changing the timing at which the seedling planting clamp 31 clamps the seedling. It is good also as a structure to be made.

  In addition, since the sweet potato seedlings are supplied to the planting supply position A in a posture facing in the front-rear direction by the seedling transport unit 5 described later, the seedling planting device 6 transplants the sweet potato seedlings into the soil in a posture facing in the front-rear direction. The vines of sweet potato seedlings are transplanted in a posture inclined with respect to the soil surface. Since the seedling planting device 6 is operated and planted on the planting locus T extending rearward and downward, the seedling is planted in a state of tilting forward. Thus, when increasing the forward inclination of the seedling planting posture and planting at the bottom of the ship, many roots of the seedlings are easily elongated, the number of sweet potatoes grown is increased, and when cultivating sweet potatoes such as processing, etc. This is useful when you want to grow a large number of sweet potatoes, even if the size of the sweet potatoes is small.

  The pair of seedling planting clamps 31 opened near the bottom dead center of the planting trajectory T (movement trajectory T ′) and released from holding the seedlings move to the front side while further tilting the posture toward the forward tilt side, It moves in the middle of the movement and operates while changing the front / rear inclination posture to the side where it becomes a vertical posture, and performs a retreat operation that moves upward and escapes from the soil. Accordingly, since the seedling planting clamp 31 is close to the entry trajectory into the soil and the exit trajectory from the soil into the soil, the seedling planting clamp 31 is suitable for planting seedlings without making the planting holes in the field dark. It can be done.

  The trajectory T (dynamic trajectory T ′) shown in the figure is the one when the transmission to the seedling planting device 6 is switched to the constant speed transmission state by the transmission switching mechanism 87. When the transmission switching mechanism 87 switches to an inconstant speed transmission state, the drive arm 34 rotates at an inconstant speed, and the speed on the trajectory T when moving backward toward the bottom dead center position in the soil is slightly increased. The insertion length of the seedling into the soil is increased.

  The circles on the trajectory T (moving trajectory T ′) shown in the figure indicate the positions of the rotational phase of the drive arm 34 every 15 degrees. In the example shown in the figure, the time between stocks is set to the minimum and the time between the stocks is set to the maximum, but the trajectory T, which is a static trajectory, is the same regardless of changes between stocks, and changes with changes between stocks. Is the movement trajectory T ′. As can be seen from the example, when planting the ship's bottom, the operating speed of the tip of the seedling planting clamp 31 is more toward the bottom dead center position in the soil than when moving to the front side past the bottom dead center position. It will be faster when moving. As a result, the amount of movement to move rearward toward the bottom dead center position in the soil can be increased, and the ship bottom can be planted.

  When the connection fulcrum of the swing link 37 to the support frame 38 is switched to the rear lower side position, the trajectory T (movement trajectory T ′) is slightly raised (the vertical width becomes larger and the front-rear width in the soil becomes smaller). It becomes smaller.), It becomes a diagonal planting in a state of planting diagonally. Compared with ship bottom planting, this diagonal planting has a smaller number of sweet potatoes after cultivation, but the size per sweet potato is larger and is suitable for the cultivation of normal edible sweet potatoes.

  A cover ring 92 serving as a pair of left and right cover covering tools is provided behind the seedling planting device 6. This soil covering ring 92 is an idle wheel and is configured to suppress the soil on the left and right sides of the seedling planted in contact with the soil surface while covering the seedling with the soil covering from the rear end portion of the support frame 38. It is provided via a ring mounting frame 96.

  Therefore, the seedling planting device 6 and the seedling transporting unit 5 that rotate around the planting clutch shaft 77 that is the input shaft of the third case portion 32c of the planting transmission case 32 are supported by the grounding of the pair of left and right covering rings 92. The seedling planting device 6 and the seedling transporting unit 5 are configured to follow the unevenness of the field scene and are maintained at a predetermined height with respect to the field scene.

  As shown in FIG. 7, between the support frame 38 and the handle frame 23, a stabilization spring 93 that stabilizes the vertical swinging of the seedling planting device 6 and the seedling transporting unit 5 is provided. The apparatus 6 and the seedling transport unit 5 are suspended. Note that the seedling planting device 6 and the seedling transporting unit 5 can be fixed so as not to swing up and down.

  Therefore, since the weights of the seedling planting device 6 and the seedling transporting unit 5 act on the soil covering ring 92, a sufficient pressure reducing action can be obtained by the soil covering ring 92. As shown in FIG. 14, the earthen ring support frame 94 is a cylindrical frame extending in the vertical direction. Inside the earthen ring support frame 94, an upper vertical adjustment rotary shaft having a male screw formed on the outer peripheral surface thereof. 95 and a lower cover ring mounting frame 96 on which female threads are formed. The cover ring mounting frame 96 has a structure in which the upper part can slide up and down on the cover ring support frame 94 but does not rotate due to the configuration of the angular axis, and the lower part is bifurcated to the left and right. Left and right cover rings 92 are rotatably attached to the left and right bifurcated portions.

  The vertical adjustment rotary shaft 95 transmits the rotation operation of the covering implement height adjustment operation tool 97, which is a rotary handle disposed at the height of the upper end of the vertical adjustment rotary shaft 95, via the height adjustment bevel gear 98. Rotate by being done. Accordingly, when the top / bottom adjustment rotary shaft 95 is rotated by the operation of the cover covering height adjustment operation tool 97, the cover ring mounting frame 96 is moved up and down to adjust the height of the cover covering ring 92. As shown in FIG. 17, a scale and a display label 99 are provided on the top of the cover ring mounting frame 96 as a guide for the height position of the cover ring 92.

  The covering tool height adjusting operation tool 97 extends rearward, that is, obliquely to the right, which is the left or right side where the steering handle 2 is located, that is, obliquely rearward to the right, and the operation grip 97a of the covering tool height adjusting operation tool 97 In a plan view, the steering handle 2 is arranged between the left and right grip portions 2 a below or near the lower side of the steering handle 2. In addition, a covering ring 92 is arranged above the planting locus T of the seedling planting device 6, and since the positional relationship between the covering ring 92 and the planted seedling approaches, it is in close contact, and the pressure suppression by the covering ring 92 can be properly maintained. It is possible to obtain a good suppression effect.

  As shown in FIG. 16, a second pressure-reducing wheel 100 is provided between the left and right soil-covering rings 92 and serves as a pressure-reducing tool for pressure-reducing the soil above the seedlings that have been moved down and planted. The second pressure reducing wheel 100 is smaller in diameter than the earth covering ring 92, and is placed in the left and right earth covering rings 92 in the state where the pressure is lowered, and is displaced rearward with respect to the rotation axis of the earth covering tool 92. It is arranged at the position.

  The second pressure-reducing wheel 100 is provided on a pressure-reducing frame 101 that rotates up and down around a fulcrum shaft 101a provided on the support frame 38. The second pressure-reducing wheel 100 is provided with a cam roller 103 disposed in front of the fulcrum shaft 101a. The cam roller 103 contacts from the lower side to the pressure-reducing cam 102 that rotates integrally with the drive arm 34, and the pressure-reducing cam 102 contacts the cam roller 103 while the rotation to the lower side is restricted by the driving of the pressure-reducing cam 102. It moves up and down as the diameter changes.

  Accordingly, the weights of the second suppression wheel 100 and the suppression frame 101 act on the field as suppression pressure. With this second pressure reducing wheel 100, the soil immediately above the seedling can be suppressed immediately after the planted seedling. In addition, the suppression action of the second suppression wheel 100 corrects the seedlings on the ground upward, and prevents the seedlings from coming into contact with the multifilm laid in the farm scene and causing damage due to the heat of the multifilm. .

  Moreover, the pressure suppression frame 101 is provided with the expansion / contraction adjustment part 101b extended and contracted by the double frame structure, and the front-back position of the 2nd pressure reduction wheel 100 can be adjusted by the expansion / contraction back and forth by the expansion / contraction adjustment part 101b. The expansion / contraction adjustment unit 101b is provided with a pressure wheel scale and a pressure wheel display label 104 that serve as a guide for the front-rear position of the second pressure wheel 100.

  Further, the support frame 38 is provided with a fixing hook 105 serving as a fixing tool for fixing the pressure suppressing frame 101 in the upward movement position without moving up and down. The fixed hook 105 is provided so as to be pivotable up and down about a longitudinal axis 105a. When the second pressure reducing wheel 100 is operated, the fixed hook 105 is rotated obliquely to the upper right side to be more than the pressure reducing frame 101. The pressure suppression frame 101 is arranged at a position away from the vertical rotation region of the pressure suppression frame 101 on the right side, and the pressure suppression frame 101 can be rotated up and down by the pressure suppression cam 102. On the other hand, when the second pressure reducing wheel 100 is not operated, the fixing hook 105 is rotated downward to hook the pressure reducing frame 101 on the fixing hook 105, and the cam roller 103 does not come into contact with the rotating pressure reducing cam 102. The two pressure wheels 100 are fixed at a position away from the ground upward.

  Further, as shown in FIG. 7, a scraper support plate 106 is fixed to the lower side of the support frame 38, and a lower end portion of a scraper arm 107 that rotates about a scraper rotation fulcrum shaft 107a provided on the scraper support plate 106. Further, a scraper 108 made of a rubber plate which is an elastic body is provided. The scraper 108 is provided with cut portions inserted from the front in two places on the left and right sides, and the left and right seedling planting clamps 31 are inserted into the left and right cut portions, whereby the left and right left and right seedling planting clamps 31 are respectively left and right. Remove soil adhering to both sides.

  A biasing device 109, which is a tension spring, is provided between the upper portion of the scraper arm 107 that is above the scraper rotation fulcrum shaft 107a and the scraper support plate 106 that is at the rear side. The scraper 108 is urged forward. On the other hand, the swing link 37 is provided with a scraper operating roller 110, and the seedling planting clamp 31 enters the soil and moves rearward toward the bottom dead center position of the trajectory T (movement trajectory T ′). When the scraper operation roller 110 hits the lower part of the scraper arm 107 from the front side and moves the lower part of the scraper arm 107 to the rear side, the scraper 108 is forcibly retracted to the side away from the trajectory T (movement trajectory T ′). Let

  Then, in the retreat movement process in which the seedling planting clamp 31 retreats from the soil and moves to the front side, the scraper operating roller 110 moves to the front side and moves away from the lower portion of the scraper arm 107, and is urged by the urging device 109. The lower part of the scraper arm 107 moves to the front side, and the scraper 108 moves on the trajectory T on the front side. Thus, the scraper 108 forcibly retreats to the side away from the locus T when the seedling planting clamp 31 is planting the seedling in the soil, and on the locus T by the urging of the urging device 109 during the retreat movement process. The urging device 109 is configured to urge the scraper 108 to the side (front side) on which the seedling planting clamp 31 is retracted and moved.

  The seedling planting device 6 will be described in detail with reference to FIG. 8 to FIG. 10. The seedling planting device 6 is connected to the seedling planting sandwiching tool 31 and a pair of seedling planting sandwiching tools 31 that sandwich the vine-shaped seedling. The seedling planting clamping tool 31 is composed of a pair of clamping tool holders 41 that open and close, and the seedling planting clamping tool 31 and the clamping tool holder 41 are joined by the vertical joining surface V. The vertical joint surface V is a substantially vertical plane parallel to the trajectory T (movement trajectory T ′) of the seedling planting clamp 31. With this configuration, the vertical mounting angle and planting depth of the seedling planting clamp 31 can be easily adjusted.

  Further, of the two bolt holes 148a and 148b provided in the joint base 149 of the seedling planting clamp 31 through which the mounting bolt 150 for connecting the seedling planting clamp 31 and the clamp holder 41 is inserted as shown in FIG. The bolt hole 148b closer to the tip of the seedling planting clamp 31 is a long hole. Thereby, the adjustment allowance of the nail | claw part of the front-end | tip of the seedling planting clamping tool 31 can be enlarged.

  Furthermore, the joint base 149 of the seedling planting clamp 31 has an L-shaped structure, and is on one side of the L-shaped structure and above the clamp tool holder 41 and perpendicular to the longitudinal joint surface V. When the position adjustment bolt 151 for adjusting the position of the seedling planting clamp 31 along the longitudinal joint surface V is provided, the mounting bolt 150 is loosened and the position adjustment bolt 151 is turned, the mounting angle and planting of the seedling planting clamp 31 are set. It becomes easy to finely adjust the depth. In addition, although the position adjusting bolt 151 is configured to be above the clamping tool holder 41, a configuration may be provided below the clamping tool holder 41.

  In addition, the seedling planting clamp 31 is in a narrowed state where the tip of the sandwiching portion 31b of the seedling planting clamp 31 is in contact with the longitudinal joint surface V inside the two clamp tool holders 41 and is in an open state. Then, it attaches so that the inner surface of the clamping part 31b may become substantially parallel (a state closer to parallel than the clamping state). A sandwiching pressure adjusting member 154 such as a spring washer is sandwiched between the seedling planting clamp 31 and the clamp holder 41 so as to be elastically clamped by the seedling planting clamp 31.

  Two spring mounting pins 155 for receiving the tension spring 44 are provided above the holding tool holder 41 so that the tension spring 44 is passed to the opposing holding tool holder 41 so that the holding force is urged. The position adjusting bolt 151 is provided at a position avoiding the two spring mounting pins 155 in plan view. In the above description, the position adjusting bolt 151 is provided at the center of the two spring mounting pins 155. However, the position adjusting bolt 151 may be provided closer to the tip of the seedling planting clamp 31 than the two spring mounting pins 155.

  The holding tool holder 41 includes a coupling base 41a with the seedling planting holding tool 31 and a stay part 41b. The stay portion 41b has one end joined to the coupling base portion 41a by welding. Further, the left and right joint portions F of the coupling base portion 41a and the stay portion 41b corresponding to the left and right seedling planting clamps 31 are configured to be shifted from each other in the vertical direction. The connecting shaft 40 serving as an opening / closing operation fulcrum of the holding tool holder 41 is positioned at a substantially central portion in the longitudinal direction of the stay portion 41b, and couples the pair of holding tool holders 41 so as to be rotatable about the connecting shaft 40. In addition, a grease-filled bearing 42b is provided at the other end of the stay portion 41b, the outer periphery of the bearing 42b abuts on the opening / closing cam 43, and the protrusion 43a of the opening / closing cam 43 causes a gap between the bearings 42b. The distance between the seedling planting clamps 31 is increased by increasing. As described above, by shifting the joint portion F in the vertical direction, it is possible to configure the stay portion 41b so as to overlap each other in the connecting shaft 40 portion. That is, cost reduction etc. are realizable by making the clamping tool holder 41 into a simpler structure.

  The connecting shaft 40 is fixed by a connecting shaft supporter 152 coupled to the support link portion 36, and the support link portion 36 constitutes a link mechanism R and causes the seedling planting clamp 31 to perform a seedling planting operation. In addition, the support link portion 36 is provided with a position shift prevention guide 153 that restrains the vertical movement of the holding tool holder 41 at a position adjacent to the connecting shaft supporter 152 as shown in FIG. The stay portion 41b of the holding tool holder 41 is sandwiched at a position shifted from each other in the vertical direction, thereby restraining the vertical movement of the stay portion 41b.

  Further, the stay portion 41b is configured to have a vertical gap. With the configuration as described above, it is possible to prevent the positional deviation of the seedling planting clamp 31 that is coupled to the tip of the clamp holder 41. The misalignment prevention guide 153 is provided with a reinforcing plate 156 and is detachable to ensure maintainability. Further, between the connecting shaft 40 fixed to the connecting shaft supporter 152 and the stay portion 41b, metal bushes 157 corresponding to the two stay portions are provided.

  The seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transport direction C, which are seedling containers that store the sweet potato seedlings in a posture in which the vines face in the front-rear direction, and as shown in FIG. Upper lateral feed section 5a that transports rightward on the upper side of the machine body, lowering feed section 5b that transports seedling container 26 that has been transported by upper lateral feed section 5a, and lower transport section 5b. The seedling container 26 is composed of a seedling transport belt 48 that includes the ascending feed part 5c that transports the seedling container 26 that has been transported above the machine body and returns it to the transport start end side of the upper lateral feed part 5a. It is transported along a loop-shaped transport path.

  Further, the upper lateral feed portion 5a is configured to protrude leftward from the left front wheel 8 and the rear wheel 7, and the left end is the outermost end on the left side of the aircraft. A tension roller 111 that deflects the seedling conveying belt 48 inward in the left-right direction is provided at an intermediate portion of the ascending feed portion 5c, so that the ascending feed portion 5c does not interfere with the left rear wheel 7.

  Further, the rear end of the upper lateral feed portion 5 a is disposed at a position behind the left front wheel 8 and the rear wheel 7. Accordingly, the worker supplies seedlings to the upper lateral feed portion 5a on the rear side of the left rear wheel 7 and the upper lateral feed portion 5a. The conveyance path is inclined so that the upper lateral feeding part 5a is located on the rear side in a side view, and the seedling container 26 of the upper lateral feeding part 5a is located at a position close to the operator on the rear side of the seedling conveying part 5. Is arranged so that the operator can easily perform the seedling supply operation to the seedling container 26 of the upper lateral feed portion 5a.

  The seedling planting device 6 is configured to plant the seedling in the seedling storage unit 26 that has been transported to the planting supply position A at the lowest position of the transport trajectory of the seedling transport unit 5 by the descending feed unit 5b. Yes. The descending feed portion 5b is provided with a seedling fall prevention plate 45 that guides the seedling into the seedling accommodating portion 26 so that the seedling does not fall, supported by the support member 46 at the upper portion thereof.

  A seedling regulating rod 112 in the left-right direction is provided above the upper lateral feed portion 5a. Therefore, when the operator simply places the seedling vine on the upper side of the seedling regulating rod 112 in the upper lateral feed part 5a, the bent side of the seedling vine becomes the lower side, and the lower end of the vine that bends on the same side as the bending of the vine Is bent downward, and seedlings can be supplied to the seedling container 26 in a desired state to be described later.

  In addition, a clip 49 serving as a seedling holder is provided at the rear end portion of the surface (outer peripheral surface) of the seedling container 26 so as to sandwich and hold the rear end portion of the seedling vine. The clip 49 is composed of a pair of left and right holding members that protrude upward from the receiving plate portion 47 of the seedling transport belt 48. Note that one of the pair of left and right holding members is made of an elastic sponge-like resin and the other is made of a flexible brush so as not to damage the vines of the holding seedlings. When the operator pushes the seedling downward, the seedling is clamped and fixed by a pair of left and right clamping bodies.

  The seedling conveyor belt 48 is wound around the front and rear drive rollers 113 provided on the upper right side, the left and right first driven rollers 114 provided on the lower side, and the second driven roller 115 provided on the upper left side, and the drive roller 113 It is rotated by driving. The seedling conveying belt 48 slightly conveys the seedling in the left and right substantially horizontal direction between the left and right first driven rollers 114, and a planting supply position A for picking up the seedling by the seedling planting device 6 is held in this conveying portion. Is set. On the other hand, the rear surface (inner peripheral surface) of the seedling transport belt 48 protrudes along the rotational direction of the seedling transport belt 48 at a position behind the center of the seedling transport belt 48 in the width direction (front-rear direction). A guide strip 116 that is a protrusion is formed. A groove 117 is formed at the position of the first driven roller 114 and the second driven roller 115 corresponding to the guide line 116, and the guide line 116 and the groove 117 mesh with each other, so that the seedling conveying belt 48 is displaced in the front-rear direction. It is preventing. In the above description, the guide strip 116 is a projecting strip. However, the guide strip 116 may be a groove strip and the first driven roller 114 and the second driven roller 115 may be configured to have protrusions that mesh with the guide strip that is the groove strip. Good.

  The upper end of the interlocking rod 139 whose lower end is connected to the swing link 37 is connected to a one-way clutch provided on the drive shaft portion of the front and rear drive rollers 113. Therefore, when the swing link 37 swings by the operation of the seedling planting device 6, the interlocking rod 139 reciprocates up and down, and the front and rear drive rollers 113 operate the seedling transport belt 48 in the seedling transport direction via the one-way clutch. Drive intermittently to make it happen. The intermittent drive of the seedling transport belt 48 is configured to stop when the seedling planting clamp 31 of the seedling planting device 6 sandwiches the seedling and to drive at other times. Therefore, when the seedling planting holder 31 of the seedling planting device 6 sandwiches the seedling and descends and plantes it in the soil, the seedling container 26 is stopped, so that the seedling can be smoothly taken out from the seedling container 26 and suitable. Certainly seedlings can be planted in the field.

  On the front side of the seedling transport unit 5, a seedling stage 140 is provided from the first case part 32 a of the planting transmission case 32 via a seedling stage support frame 81. The sweet potato seedlings are placed on the seedling stage 140 in a state of being accommodated in a storage box or the like, and the operator supplies the seedlings on the seedling stage 140 to the upper lateral feed part 5a of the seedling transport part 5. To do. The rear end portion of the seedling placing stand 140 is disposed close to the front end portion of the upper lateral feed portion 5a, so as to facilitate the seedling supply to the upper lateral feed portion 5a.

  Further, on the left side of the upper lateral feed section 5a, a bowl-shaped spare seedling storage part 118 for storing a spare seedling is provided. The preliminary seedling storage part 118 is supported by front and rear preliminary seedling storage part support frames 119 that can rotate around the central axis of the second driven roller 115. The body width can be reduced by rotating the reserve seedling container support frame 119 to the inside (right side) in the left-right direction of the machine body and moving the reserve seedling container part 118 to the storage position located above the upper lateral feed part 5a. . The reserve seedling storage unit 118 is moved to the right and exceeds the dead point, and the reserve seedling storage unit support frame 119 hits the storage stopper 120 provided on the machine body and is held in the storage position. Even in this storage position, the spare seedling storage unit 118 does not interfere with the seedling transport belt 48 and the clip 49 of the seedling transporting unit 5 and can drive the seedling transporting unit 5.

  A transmission lever 142 which is an operation lever capable of switching the transmission mechanism in the mission case 9 to change the traveling speed of the traveling device 4 stepwise is provided extending from the position of the mission case 9 to the rear side. The shift lever 142 extends from the traveling device 4 to the rear side of the seedling transport unit 5 through a space surrounded by the upper lateral feed unit 5a, the lowering feed unit 5b, and the ascending feed unit 5c of the seedling transport unit 5. . That is, the transmission lever 142 passes through a predetermined loop-shaped conveyance path of the seedling conveyance unit 5. The gripping portion 142a of the speed change lever 142 protrudes to the rear side of the seedling transporting portion 5, but the speed change lever guide 121 that supports the speed change lever 142 and serves as a lever support member in which the speed change position is indicated includes the upper lateral feed portion 5a, It arrange | positions in the space enclosed by the downward feed part 5b and the upward feed part 5c. Therefore, the shift lever 142 and the shift lever guide 121 are disposed as far as possible while maintaining the operability of the shift lever 142. The shift lever guide 121 is supported from the third case portion 32c of the planting transmission case 32, and swings up and down around the planting clutch shaft 77 in the left and right direction together with the seedling conveying unit 5 and the seedling planting device 6. . The front end portion of the speed change lever 142 (the portion immediately in front of the seedling transporting portion 5 and immediately behind the transmission case 9) is provided with a telescopic portion that can be expanded and contracted in the lever axial direction. The lever 142 is allowed to swing up and down so that the transmission lever guide 121 and the instruction portion on the transmission lever 142 side are not separated greatly.

  Also, a left and right tilt lever 122, which is an operation lever for forcibly operating the left and right horizontal control hydraulic cylinder 16 by switching the rolling hydraulic valve provided in the mission case 9 portion, is provided extending from the mission case 9 portion to the rear side. ing. The left / right inclined lever 122 extends from the traveling device 4 to a space surrounded by the upper lateral feed portion 5a, the descending feed portion 5b, and the ascending feed portion 5c of the seedling transporting portion 5. The grip portion 122a and the left / right tilt lever guide 123 of the left / right tilt lever 122 are disposed in a space surrounded by the upper lateral feed portion 5a, the descending feed portion 5b, and the ascending feed portion 5c. Therefore, the left and right tilt lever 122 is arranged as far as possible on the front side. Since the operation frequency of the left / right tilt lever 122 is lower than that of the speed change lever 142, even if the left / right tilt lever 122 is disposed in the space, the operability is not significantly affected. The left and right tilt lever 122 is a lever that is temporarily operated to the left and right and returns to the neutral position when released, and does not have an instruction portion like the speed change lever 142, so that it does not expand and contract like the speed change lever 142.

  By the way, a liquid agent tank (water tank) 124 for storing water as a liquid agent is disposed at a position in front of the seedling conveying unit 5 and on the outer side (right side) in the left-right direction. In addition, the liquid agent tank 124 is disposed at a position on the right side of the seedling stage 140. The planting clutch shaft 77 protrudes to the right side of the first case portion 32 a of the planting transmission case 32, and the pump driving flange 125 is attached to the planting clutch shaft 77, which is displaced from the rotation center of the pump driving flange 125. A tip of a pump cylinder rod 127 constituting a pump (plunger pump) 126 for sending water to a position is connected. The cylinder portion of the pump is connected to the airframe.

  Accordingly, water is supplied from the liquid agent tank 124 to the pump 126 through the supply pipe 128, and the pump driving flange 125 is rotated by driving the planting clutch shaft 77, so that the pump cylinder rod 127 is reciprocated by the crank motion. The water in the cylinder is sequentially sent out. By attaching the pump 126 to the planting clutch shaft 77, which is the transmission shaft disposed in the uppermost position in the planting transmission case 32 and thus in the transmission path of the seedling transplanter 1, the pump 126 can be disposed at a high position, and the liquid agent discharge described later. A head to the outlet 129 can be secured, water can be sent smoothly, and water remaining in the supply pipe 128 can be easily discharged at the end of the operation. The pump driving flange 125 has a double flange configuration of a base flange portion 125a that rotates integrally with the planting clutch shaft 77 and an adjustment flange portion 125b that is attached to the base flange portion 125a with mounting bolts. The mounting bolts are inserted into the long holes provided in the adjustment flange portion 125b. The pump cylinder rod 127 is connected to a connecting portion provided in the adjusting flange portion 125b. By moving (rotating) the adjusting flange portion 125b along the long hole with respect to the base flange portion 125a, the pump cylinder rod 127 is connected. The operation timing (operation phase) of the reciprocating motion is changed, and the irrigation timing (phase) with respect to the operation phase of the seedling planting device 6 is changed and adjusted.

  As a standard, the irrigation timing is a liquid agent during which the seedling planting clamp 31 rotates about 90 degrees in terms of the rotation angle of the drive arm 34 from when it enters the soil until just before it reaches the bottom dead center position. It is the timing when water is discharged from the discharge port 129. Then, the irrigation timing can be adjusted steplessly by the rotation of the adjusting flange, and when the irrigation timing is delayed most, the scraper 108 contacts the seedling planting clamp 31 after the seedling planting clamp 31 has left the soil. Irrigation is done until

  On the other hand, when the irrigation timing is the earliest, irrigation starts before the seedling planting clamp 31 clamps the seedling at the planting supply position A and before it enters the soil. Therefore, the liquid agent discharge port 129 that enters the soil together with the seedling planting clamp 31 and discharges the liquid agent to the field is provided, and the timing of discharging the liquid agent from the liquid agent discharge port 129 is set only when the liquid agent discharge port 129 is in the soil. The discharge timing and the discharge timing over a state where the liquid agent discharge port 129 enters the soil and a state where the liquid agent discharge port 129 does not enter the soil can be adjusted.

  As already described, the seedling planting sandwiching tool 31 is composed of a shaft portion 31a that is attached to the sandwiching tool holder 41 and a plate-shaped sandwiching portion 31b that grips the seedling formed at the tip of the shaft portion. The clamping portion 31b is fixed to a position near the inner end in the left-right direction of the shaft portion 31a by welding. In the left seedling planting clamping tool 31, the shaft portion 31a is constituted by a pipe, and the end portion on the clamping portion 31b side of the pipe-shaped hollow portion of the shaft portion 31a is exposed on the left and right outer sides of the clamping portion 31b. A liquid agent discharge port 129 for discharging water is formed at the exposed portion.

  Therefore, since water is discharged on the outside of the seedling planting clamp 31 (on the opposite side to the seedling), it is possible to prevent the planting from being affected by water and to improve planting accuracy. In addition, the shaft portion 31a of the left seedling planting clamp 31 is bent at an end on the clamp holder holder 41 side toward the upper right side, and a supply pipe 128 that transfers water from the pump 126 to the end. Is connected. Therefore, the liquid agent can be supplied (irrigated) near the planted seedling by the liquid agent discharge port 129. That is, the end portion of the shaft portion 31a is arranged obliquely toward the other (right side) seedling planting clamp 31 side, suppresses interference with the position adjusting bolt 151 immediately on the left side, and smoothes the flow of water. To do. Further, the liquid agent discharge port 129 is provided only in the left seedling planting clamp 31, and the liquid agent discharge port 129 is not provided in the right seedling planting clamp 31.

  Therefore, although the seedling transport unit 5 is arranged to be deviated to the left and right side (left side) that is the transport start end side of the upper lateral feed unit 5a, the liquid agent tank 124 that stores the liquid agent is different from the seedling transport unit 5 in the left and right directions. Displaced on the opposite side (right side) and provided with a seedling planting clamp 31 or a liquid agent discharge port 129 that discharges the liquid agent to the field near the seedling planting clamp 31, the side on which the seedling transport unit 5 is offset (left side) ) Of the seedling planting clamp 31).

  By transmitting the driving resistance of the pump 126 to the planting clutch shaft 77, it is possible to prevent the operation of the seedling planting device 6 from being preceded by a desired weight or inertia. Even when the pump 126 is removed from the machine body when irrigation is not performed, the seedling planting device 6 can be operated by its own weight, inertia, etc. by installing a braking device that transmits the braking force to the planting clutch shaft 77 instead of the pump 126. It is suppressed that it precedes more than desired. When the driving resistance of the pump 126 is small and the advance operation of the seedling planting device 6 is not sufficiently suppressed, an auxiliary spring for suspending the seedling planting clamp 31 from above is provided, and supplementary by the biasing force of this auxiliary spring. The preceding operation is suppressed.

  Also, a protective cover that covers the pump 126 is provided, and this protective cover can be attached to the airframe even when a braking device is attached instead of the pump 126, and safety can be improved. The protective cover is affixed with a quick reference table between planted stocks based on the setting of the traveling speed and the shift between stocks, but the quick reference table can be confirmed when either the pump 126 or the braking device is attached.

  Further, when water is not temporarily irrigated, the water can be circulated by a return pipe that returns the water sent from the pump 126 to the liquid agent tank 124, and the operation can be performed without irrigation without removing the pump 126. In addition, a switching valve is provided for switching between a state in which water delivered from the pump 126 is supplied to the supply pipe 128 to the liquid agent discharge port 129 and a state in which the water is supplied to the return pipe.

  As described above, the seedling transplanting machine 1 is self-propelled by the traveling device 4 in a state where the left and right front wheels 8 and the rear wheels 7 straddle the heel, and the upper lateral feed portion 5a of the seedling transporting portion 5 of the self-propelled aircraft. A sweet potato seedling is supplied from an operator behind the left rear wheel 7 so as to walk in a trough valley through which the left front wheel 8 and the rear wheel 7 pass. The seedling transport unit 5 transports the supplied seedling, and the seedling planting device 6 plants the seedling that has been transported to the planting supply position A by the seedling transport unit 5 in the field.

  The seedling transport unit 5 includes a plurality of seedling containers 26 in the seedling transport direction C, and the sweet potato seedlings are stored in the seedling container 26 in a posture in which the vines face in the front-rear direction. An operator supplies seedlings to the seedling container 26 that is transported in one left-right direction on the upper side of the machine body by the upper lateral feed section 5a. That is, the operator supplies the lower end of the seedling vine to the clip 49 and fixes the seedling to the seedling container 26. The seedling container 26 to which the seedlings are supplied is conveyed to the lower side of the machine body by the descending feeding unit 5b following the upper lateral feeding unit 5a. The seedling container 26 that has been transported by the descending feed part 5b is transported upward by the ascending feed part 5c and returns to the transport start end side of the upper lateral feed part 5a.

  The seedling planting device 6 has the seedling planting clamp 31 moved up and down by the drive unit, and is attached to the rear end of the seedling stored in the seedling container 26 that has been transported to the planting supply position A by the descending feed unit 5b. Acts on the rear side of the seedling container 26 to plant seedlings in the field. At this time, the seedling is clamped and fixed by the clip 49 of the seedling container 26. Since the clamping force of the seedling planting holder 31 of the seedling planting device 6 is larger than the clamping force of the clip 49, the seedling planting device 6 moves the seedling to the rear side along the planting locus T so that the vine of the seedling is detached from the clip 49.

  When transplanting this sweet potato seedling, the operator fixes the lower end of the seedling vine to the clip 49 of the seedling container 26 in the upper lateral feed section 5a of the seedling transport section 5 and supplies it, but the bent vine t When the seedling is supplied with its lower end facing downward, the seedling is transported by the seedling transporting unit 5 and the bottom end of the vine t is directed upward at the planting supply position A, and the leaves of the seedling are directed upward with respect to the vine. . And a seedling is transplanted in soil with the seedling planting apparatus 6 with the posture.

  Therefore, since the process of transporting the seedlings into the soil of the seedling planting device 6 is simple, the vines are less likely to be bent or twisted, and the transplanting accuracy is improved, and the leaves are intensively directed upward with respect to the inclined vines. Can be transplanted with sweet potato seedlings Further, since the pair of seedling planting clamps 31 extending vertically sandwich the lower end of the vine bent upward in the state of tilting forward at the planting supply position A, the lower end of the vine bent in the direction of the seedling planting clamp 31 It can be in a state close to the vertical direction with respect to the orientation of the seedling, and even if the position of the seedling is slightly shifted at the planting supply position A, it is possible to ensure and stabilize the holding of the seedling, and in a proper posture Can be planted, and stable seedling transplantation can be performed.

  Therefore, since sweet potato seedlings can be transplanted with the leaves intensively directed to the inclined vines, the transplanted seedling leaves project out of the soil and receive light such as sunlight The roots grow vigorously and can grow well, and the sweet potato can be cultivated vigorously. In addition, since the direction of the leaf with respect to the axis of the vine is determined by the direction of the lower end of the vine, which is particularly bent, and the transplant is performed, this determination is facilitated, and the operation of supplying the seedling to the clip 49 can be performed easily. The working efficiency of the seedling supply operation to the seedling container 26 is improved, the seedling transporting section 5 can be operated at a high speed in order to improve the transplanting work efficiency, and the working efficiency of the seedling transporting work of the seedling transporting section 5 is improved. Can be achieved.

  FIG. 21 shows a configuration in which a multi presser 130 for pressing the multifilm against the surface is provided. The multi-holding device 130 is in contact with the upper surface of the multi-film so as to sandwich the trajectory T of the seedling-planting sandwich tool 31 from the left and right so that the multi-film is not rolled up when the seedling-planting sandwich tool 31 plants the seedling.

  The left and right multi-holding members 130 are attached to the attachment left and right elongated holes of the attachment bracket 132 with bolts so that the left and right intervals can be adjusted. A seedling receiving plate 131 for receiving seedlings to be planted by the seedling planting clamp 31 is provided on the front portion of the multi-presser bar 130. A seedling separation guide 133 for separating the seedling held by the clip 49 from the seedling transport belt 48 is provided below the seedling transport belt 48.

  The left and right widths of the multi-presser bar 130 are such that the pinching part 31b of the seedling-planting pinching tool 31 that holds the seedling passes therethrough, but the multi-presser bar 130 contacts and vibrates the multi-presser bar 130 when planted. It may be easy to insert seedlings by softening the surface.

  In addition, as shown in FIG. 22, if the two multi presser foot 130 and the seedling separation guide 133 are integrally formed with a wire, the manufacturing cost can be reduced. Further, the multi-presser bar 130 may be formed of a belt-like plate.

  23 and 24 show a mud cover 135 that wraps the front wheel 8 and prevents mud from adhering. At the left and right edges of the mud cover 135, a V-shaped cut 134, a pasting sheet 136 and a string hole 137 are provided, wrapped around the front wheel 8 and fastened with a string 138.

DESCRIPTION OF SYMBOLS 4 Traveling apparatus 5 Seedling conveyance part 6 Seedling planting apparatus 31 Seedling planting clamping tool 31b Holding part 130 Multi presser

Claims (4)

  In a seedling transplanting machine provided with a seedling planting device (6) for planting a seedling in a seedling transport section (5) by a seedling planting clamping tool (31) that lifts and lowers the seedling of the seedling transport unit (5) on a machine traveling by a traveling device (4) A seedling transplanting machine characterized in that the facing interval of the clamping part (31b) of the seedling planting clamping tool (31) is narrowed toward the tip in the clamping state.   The seedling transplanter according to claim 1, wherein a multi-presser (130) for pressing the multi-film on the heel from the left and right is provided in the machine body at a position where the seedling planting clamp (31) inserts the seedling into the cocoon.   The seedling transplanter according to claim 2, wherein the multi-presser (130) vibrates in contact with the seedling planting clamp (31).   The seedling transplant according to any one of claims 1 to 3, wherein a cutting blade (30) protruding upward is provided in a clamping part (31b) of the seedling planting clamping tool (31). Machine.

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