JP2013111041A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a hollow for storing water in the periphery of a planted seedling.SOLUTION: This transplanter includes: a traveling part for traveling a machine body; a planting tool (28) whose downward tip is opened and closed to plant a material to be transplanted; a vertical motion mechanism for moving up and down the planting tool (28); a hollow making unit (110) disposed in front of the planting tool (28); and a hollow making unit vertically moving member for moving up and down the hollow making unit (110), wherein the hollow making unit (110) moves downward and dashes into the soil to make a hollow, and a picking tool (151) for picking the soil is provided in front of the hollow making unit (110).

Description

  The present invention belongs to the technical field of transplanting machines for transplanting transplanted objects such as seedlings and seed pods in a field.

  2. Description of the Related Art There is known a transplanting machine provided with a traveling unit that travels an airframe, a planting tool for planting a transplant object with a downwardly opened tip opening and closing, and a vertical movement mechanism that moves the planting tool up and down. In this transplanter, an operator supplies seed pods and seedlings, which are transplant objects prepared on a mounting table, to a plurality of supply cups in accordance with the running of the transplanter, and sequentially from the supply cups to the planting tools. A transplant object is supplied, and a planting tool enters the soil to open a planting hole and plant the transplant object in a field (see Patent Document 1).

JP 2009-284858 A

  This invention makes it a subject to set it as the structure which can form the hollow for storing water around the planted seedling.

In order to solve the above problems, the following technical measures were taken.
That is, the invention according to claim 1 includes a traveling unit (13, 14) for traveling the aircraft, a planting tool (28) for planting a transplant object by opening and closing a downward tip, and a planting tool (28). A vertically moving mechanism (19) that moves up and down, a hole forming body (110) disposed in front of the planting tool (28), and a hole forming body vertical moving member (115) that moves the hole forming body (110) up and down. The transplanter has a structure in which a hole is made by moving down and entering the soil by moving the hole-making body (110), and a tool (151) for unraveling the soil is provided in front of the hole-making body (110). It was.

The invention according to claim 2 is the transplanter according to claim 1, wherein the unfolding tool (151) is configured to move up and down in conjunction with the vertical movement of the hole making body (110).
The invention according to claim 3 is the transplanter according to claim 1, wherein the right and left width of the unroller (151) is larger than the left and right width of the hole making body (110).

  In the invention according to claim 4, after the hole making body (110) is moved downward, the planting tool (28) is moved down into the hole making body (110), and the planting tool (28) is moved downward. The transplanter according to claim 1, wherein the hole making body (110) is configured to open in conjunction with the device.

  According to the first aspect of the present invention, the hole making body 110 can make a hollow hole for collecting water around the position where the seedling is planted, and the seedling planted in the hollow hole by the planting tool 28 is subjected to precipitation and irrigation. Thus, the water accumulated in the hollow is smoothly supplied. In addition, since the soil portion unraveled with the unraveling tool 156 can be drilled with the hole-making body 110, a hole with an appropriate shape and size can be made, and water can be supplied accurately to the planted seedlings. Can be done.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the unraveling tool 156 can be moved up and down with a simple structure interlocked with the vertical movement of the hole making body 110.
According to the invention of claim 3, in addition to the effect of the invention of claim 1, at least the entire area in the left and right width of the hole making by the hole making body 110 is unraveled by the unraveling tool 156 in advance. Drilling resistance by the body 110 can be suppressed, and drilling of an appropriate shape and size can be performed.

  According to the invention according to claim 4, in addition to the effect of the invention according to claim 1, the planting tool 28 enters the hollow hole formed by the hole making body 110 to form the planting hole. A hollow can be reliably formed around. In addition, when the planting tool 28 moves down to form a planting hole, the hole making body 110 is opened to reduce the density of the soil in the hollow, so that the planting hole can be easily formed with a low soil resistance. It can be formed smoothly. Further, since the soil is pressed outward by opening the hole making body 110, the hole making body 110 can form a hollow that is not easily collapsed.

Tobacco seedling transplanter left side view Top view of tobacco seedling transplanter (A) Bottom view of the seedling supply unit from below, (b) Partial perspective top view of the seedling supply unit Side sectional view explaining mounting structure of seedling supply unit Perspective view seen from the left front of the planting device Perspective view seen from the right rear of the planting device Side view of planting device Side view of planting device with different forms of unwrapping device Side view of the planting device of a partially different form, with the illustration of the unwrapping tool omitted The figure explaining the arrangement position of each drive shaft in a planting drive transmission case The figure explaining the movement locus | trajectory of the front-end | tip part of the planting tool seen from back A graph showing the trajectory of the tip of the right-hand member of the planting tool viewed from behind Side view of the vertical motion mechanism part (A) Plan view of hole making lift arm portion, (b) Plan view of stopper portion, (c) Plan view of hole making body portion Side view of the linkage mechanism part for controlling the height of the body of the tobacco seedling transplanter (A) Side view of balance connecting stay, (b) Plan view of balance connecting stay (A) Front view of balance, (b) Plan view of balance (A) Side view of hydraulic rod, (b) Plan view of hydraulic rod Plan view for explaining the connection relation of each part of the linkage mechanism of the aircraft height control of the tobacco seedling transplanter Schematic plan view for explaining the rolling adjustment lever of a modified example of the tobacco seedling transplanter (A) Schematic plan view of the rolling adjustment lever portion, (b) Schematic plan view of the switching valve portion for left / right tilting (A) Side view showing the mounting part of the grounding stand, (b) Plan view showing the mounting part of the grounding stand (A) Left side view of grounding stand, (b) Front view of grounding stand The top view for demonstrating arrangement | positioning of a reserve seedling mounting stand (A) Side view of spare seedling placement table, (b) Rear view of spare seedling placement table

One embodiment of the present invention will be described below. The following embodiment is merely an embodiment and does not restrict the scope of the claims.
FIG. 1 is a side view showing a tobacco seedling transplanter 10 for transplanting tobacco seedlings as an example of a transplanter according to an embodiment of the present invention, and FIG. 2 is a plan view of the tobacco seedling transplanter 10.

In the drawings of the present application, unless otherwise specified, the left side of the drawing is the front of the tobacco seedling transplanter.
This tobacco seedling transplanter 10 has an engine 11 and a main transmission case 12 at the front, a pair of left and right front wheels 13 and rear wheels 14 as traveling wheels, and a planting device 19, a seedling supply unit 31, a pressure reducing wheel 15 at the rear. And a steering handle 16.

  The front wheel 13 and the rear wheel 14 are an example of the traveling unit of the present invention, and the steering handle 16 is an example of the handle of the present invention. In addition, a seedling of tobacco seedling corresponds to an example of the transplant object of the present invention.

  The tobacco seedling transplanter 10 has a front wheel 13 and a rear wheel 14 traveling between the ridges so that the traveling machine body straddles the ridge U in the field. Planting seedlings.

  The left and right ends of the main transmission case 12 are provided with travel extension cases 40 that are rotatable with respect to the main transmission case 12, and the travel chain cases 20 are attached to the respective ends of the left and right travel extension cases 40. ing. Therefore, the power in the main transmission case 12 input from the engine 11 is transmitted into the traveling chain case 20.

  A pair of left and right rear wheels 14 which are traveling wheels are respectively attached to the left and right outer sides of the rotating tip of the traveling chain case 20, and the airframe travels by driving the pair of left and right rear wheels 14. Therefore, the main transmission case 12 is a transmission device that transmits to the rear wheel 14 as a traveling wheel.

  On the other hand, a front wheel support frame 41 extending in the left-right direction is provided at the lower portion of the engine mounting table so as to be rotatable around the rolling shaft 18 in the front-rear direction, and the front wheels 13 are attached to both left and right ends of the front wheel support frame 41. .

  A rear frame 21 extending in the left-right direction is fixedly provided at the rear end of the main transmission case 12, and a main frame 22 extending in the front-rear direction at a position on the right side of the fuselage is provided at the right end of the rear end surface of the rear frame 21. Provided. A steering handle 16 is provided at the rear end of the main frame 22, and the steering handle 16 is supported by the main transmission case 12 via the main frame 22 and the rear frame 21. The planting transmission case 26 is fixedly provided on the upper surface of the rear frame 21 on the left or right side (right side) with the front lower end portion of the planting transmission case 26 mounted thereon.

  In addition, a hydraulic lifting cylinder 23 is provided at the rear portion of the main transmission case 12 in the center in the left-right direction. The hydraulic elevating cylinder 23 is fixedly provided to a hydraulic pressure switching valve portion 24 attached to the main transmission case 12, and an oil path from a hydraulic pump attached to the main transmission case 12 is switched by the hydraulic pressure switching valve portion 24. It operates by.

  Also, a horizontal rod 43 extending left and right is provided at the rear end of the cylinder rod of the hydraulic lifting cylinder 23, and a left rear wheel lifting rod 44 and a right rear wheel lifting rod 45 serving as rods are provided at the left and right ends of the horizontal rod 43, respectively. The other ends of the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 are pivotally attached to the upper arm 40a attached to each traveling extension case 40, and the horizontal rod 43 and the traveling extension case 40 are coupled. It has been configured.

  Accordingly, the travel chain case 20 is rotated around the left and right output shafts of the main transmission case 12 via the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 by the expansion and contraction of the hydraulic lifting cylinder 23, As the traveling chain case 20 is rotated, the rear wheel 14 is moved up and down to raise and lower the traveling machine body. It should be noted that the cylinder rod, the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 of the hydraulic lifting cylinder 23 are located below the lifting link mechanism 29, which will be described later in side view, depending on the advancement position of the cylinder rod. The structure is positioned, and space is effectively used to make the aircraft more compact.

  Further, at a position just below the position where the planting tool 28 of the planting device 19 plants the seedlings on the cocoon U at a position below the center of the machine body, the height of the cocoon U upper surface is in contact with the known cocoon U upper surface. The left ground contact position detection body 36 and the right ground contact position detection body 37 are provided, and the lifting / lowering provided in the hydraulic pressure switching valve unit 24 by detecting the heel U of the left ground contact position detection body 36 and the right ground contact position detection body 37 is provided. The hydraulic elevating cylinder 23 is operated through the control switching valve to raise and lower the left and right rear wheels 14, and the traveling body is controlled to a predetermined height with respect to the heel U, and the planting tool 28 sets the seedling to the heel U. The planting depth is constant.

  Further, a left / right tilt hydraulic cylinder 25 that is actuated by hydraulic pressure from a hydraulic pump is provided in the middle of the left rear wheel lift rod 44 so that the left rear wheel lift rod 44 extends and contracts. The left rear wheel 14 is moved up and down with respect to the vertical position of the right rear wheel 14 by the expansion and contraction of the right and left, and the traveling machine body is controlled to a desired left and right inclined posture regardless of the unevenness of the valley portion of the heel U. .

  A pendulum-type left / right tilt sensor 42 is provided on the right side of the main transmission case 12, and the left / right tilt sensor 42 detects the left / right tilt via a left / right tilt switching valve provided in the hydraulic pressure switching valve unit 24. The hydraulic cylinder 25 is actuated to control the traveling machine body to a desired left / right inclined posture.

  The planting device 19 of the present embodiment includes a planting transmission case 26 provided on the rear side of the main transmission case 12 with power from within the main transmission case 12 in order to plant seedlings one by one on the vine of the field. It is transmitted and operated through a planting device drive case 27 attached to the planting transmission case 26.

  The planting device 19 includes a cup-shaped planting tool 28 with a sharp tip and an elevating link mechanism 29 that operates to raise and lower the planting tool 28. In the drawing, the tip of the planting tool 28 is drawn by a lifting and lowering operation of the planting tool 28 and descends on the front side and rises on the rear side, and the locus 17 has a shape in which the width in the front-rear direction is larger in the lower part than in the upper part. It operates repeatedly in the direction of the arrow.

The planting device 19 corresponds to an example of a vertical movement mechanism that moves the planting tool of the present invention up and down. Further, the locus 17 corresponds to an example of the operation locus of the present invention.
Moreover, when planting a seedling with the planting tool 28, the hole making body 110 which forms a shallow hollow hole in the field around the planted seedling is provided. A hole-forming support frame 111 that supports the hole-forming body 110 at one end is rotatably attached to the main frame 22 so that the hole-forming body 110 can move up and down.

  In addition, a hole making rod 112 is connected to the middle portion of the hole making support frame 111. When the hole making rod 112 is moved up and down, the hole making support frame 111 is moved up and down, and the hole making body is moved. The vertical movement of 110 is controlled.

The seedling supply unit 31 is operated by the power transmitted from the turntable drive case 38 being transmitted by the rotational force transmission member 77.
The seedling supply unit 31 includes a rotatable supply turntable 32 that is provided above the planting device 19 and that is fixedly arranged in a loop through eight supply cups 33 having openings at the upper and lower ends. A character-shaped supply cup opening / closing guide 35 and a rotation drive mechanism 78 for rotating the supply turntable 32 counterclockwise are provided.

  The supply turntable 32 is a tray-shaped member whose outer peripheral edge is bent downward, and has a substantially cylindrical shape whose both ends are opened in eight holes that are opened at equal intervals near the outer periphery of the circular flat portion. The supply cups 33 are fixed through. In addition, a rotation shaft for rotating the supply turntable 32 counterclockwise by the rotational force from the rotation drive mechanism 78 is fixedly disposed at the center of the supply turntable 32.

  The rotation drive mechanism 78 is fixed to a support column 39 fixed to the airframe and is fixed to an auxiliary plate 79. The auxiliary plate 79 is fixed to the main frame 22 via an auxiliary plate support plate 132 fixed to the main frame 22.

An opening / closing lid 34 that is movable in the vertical direction is provided at the bottom of each supply cup 33.
Further, below each supply cup 33, only when the supply cup 33 comes to a predetermined position P, which is the position above the planting tool 28, by the rotation of the supply turntable 32 in the direction of arrow A, the supply cup 33 A substantially C-shaped supply cup opening / closing guide 35, which is partially cut out of an annular shape, is fixed to a support column 39 so that the opening / closing lid 34 at the bottom of the opening is opened. The supply cup opening / closing guide 35 restricts the opening / closing lid 34 from opening at a position other than the predetermined position P by contacting and supporting the opening / closing lid 34 from below.

  In the tobacco seedling transplanting machine 10 according to the present embodiment, an operator walking with the traveling of the aircraft grabs the seedlings on the spare seedling mounting table 30 one by one and moves in the direction of arrow A according to the traveling of the aircraft. Each is put into the supply cup 33 which is rotating.

  When the opening / closing lid 34 of the supply cup 33 is opened at the predetermined position P, the seedlings in the supply cup 33 are supplied to the lower planting tool 28. The planting tool 28 enters the soil to a predetermined depth when it reaches the bottom dead center of the operation locus 17 and opens to the left and right like a birdcage to drop and plant the seedlings held inside. .

  Next, the detailed configuration and operation of the planting device 19 of the tobacco seedling transplanter 10 will be described. The planting device 19 receives a seedling from an opening formed in the upper part, and has a cup-shaped planting tool 28 with a sharp tip that can be opened and closed to the left and right, and a planting drive transmission case that drives the planting tool 28 up and down. And an elevating link mechanism 29 provided at 106.

  The planting tool 28 generally holds a seedling in the state where the cup-shaped lower part with a sharp tip is closed, and opens to the left and right at the lowermost end of the planting locus 17 to plant the seedling in a cage. It is a typical configuration. A seedling guide 108 is attached to the upper part of the planting tool 28 so that the seedlings falling from the supply turntable 32 surely enter the planting tool 28.

  In the lifting link mechanism 29 of the present embodiment, the upper end is pivotally supported by the swing cam drive shaft 88 on the left side of the planting drive transmission case 106, and the lower end is pivotable by the lower front shaft 91. The upper end is fixed to the front swing arm 80 connected to the connection support plate 94 and the upper rear shaft 90 which is rotatable with respect to the planting drive transmission case 106, and the lower end is rotatable about the lower rear shaft 93. A front swing arm 80 and a left rear swing arm 81 provided in parallel with the front and rear are connected to the connection support plate 94. Further, the upper rear shaft 90 has the other end protruding to the right side of the planting drive transmission case 106, and the upper end of the right rear swing arm 99 is fixed to the right side of the planting drive transmission case 106.

  The planting drive transmission case 106 transmits the power output from the planting device drive case 27, penetrates the swing cam drive shaft 88 provided to project to the left side, and the planting drive transmission case 106 on the left and right sides. The projecting crank arm drive shaft 89 is driven.

  Further, the front end is pivotally supported by the upper shaft 92 and the lower rear shaft 93 of the connection support plate 94, respectively, and the rear end is pivoted by the rotation upper shaft 95 and the rotation lower shaft 96 of the planting tool 28, respectively. A parallel upper arm 82 and a lower left arm 83 are connected freely. On the right side of the planting drive transmission case 106, a right end pivotally supported by a lower end portion of the right rear swing arm 99 and a rear end pivotally connected to the right side of the planting tool 28. A lower arm 97 is provided.

  The lower right arm 97 is arranged in parallel with the lower left arm 83, and is connected to the lower left arm 83 by a left and right connecting rod 98 pivotally supported at both ends by the lower left arm 83 and the lower right arm 97, respectively.

  A crank arm 85 having a base fixed to a crank arm drive shaft 89 that protrudes to the right from the planting drive transmission case 106, and a rotation support shaft provided at the tip of the crank arm 85, one end of which is rotatable. A connecting arm 86 is provided that is pivotally supported and has the other end connected to a middle portion of the left and right connecting rods 98. The left and right connecting rods 98 are rotatably connected to the connecting arm 86.

  In addition, a rocking drive cam 84 that is fixed to a rocking cam drive shaft 88 that protrudes from the planting drive transmission case 106 and rotates to the left is provided, and left so as to contact the peripheral edge of the rocking drive cam 84. A rotation roller 87 is provided in the middle of the rear swing arm 81 near the upper rear shaft 90 so as to be rotatable.

  In addition, the front swing arm 80 and the left rear swing arm 81 are attached to the front of the machine body between the support pin provided on the planting device drive case 27 and the lower end of the left rear swing arm 81. A tension spring (not shown) is provided to urge the swing drive cam 84 and the rotation roller 87 into contact with each other.

Further, a counter arm 104 for opening and closing the planting tool 28 is pivotally supported on a pivot upper shaft 95 to which one end of the upper arm 82 is connected.
The open / close arm 101 is pivotally supported by an upper shaft 92 to which the other end of the upper arm 82 is connected, and the open / close arm 101 and the counter arm 104 are connected by a connecting rod 103. . The counter arm 104 is provided with a hole, and a pin 105 erected on the holder portion of the planting tool 28 is loosely fitted thereto.

  In addition, an opening / closing drive cam 100 that is fixed to the swing cam drive shaft 88 and rotates together with the swing drive cam 84 is provided, and is provided on the opening / closing arm 101 so as to contact the peripheral edge of the opening / closing drive cam 100. A roller 102 is provided. When the opening / closing drive cam 100 rotates according to the rotation of the swing cam drive shaft 88, the opening / closing arm 101 is acted on the opening / closing arm 101 at a predetermined timing.

With such a configuration, the planting device 19 according to the present embodiment operates such that the tip of the planting apparatus 19 draws the locus 17 when the tobacco seedling transplanter 10 is stopped during the planting operation.
Next, operation | movement of the planting apparatus 19 of this Embodiment is demonstrated.

  As the swing cam drive shaft 88 rotates, the swing drive cam 84 fixed to the swing cam drive shaft 88 rotates together with the swing cam drive shaft 88 and rotates in contact with the swing drive cam 84. The left rear swing arm 81 and the front swing arm 80 swing back and forth via the roller 87. At this time, the right rear swing arm 99 connected to the left rear swing arm 81 by the upper rear shaft 90 also swings back and forth together with the left rear swing arm 81.

  The front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 swinging back and forth mainly correspond to an example of the front and rear swing link of the present invention. The swing drive cam 84 corresponds to an example of the front / rear swing member of the present invention, and the swing cam drive shaft 88 corresponds to an example of the front / rear swing drive shaft of the present invention.

  On the other hand, when the crank arm drive shaft 89 rotates, the crank arm 85 fixed to the crank arm drive shaft 89 rotates together with the crank arm drive shaft 89, and the lower left arm is connected via the connecting arm 86 and the left and right connecting rods 98. 83 and the lower right arm 97 swing up and down, and the upper arm 82 swings up and down together with the lower left arm 83.

  Note that the lower left arm 83, the lower right arm 97, and the upper arm 82 that mainly swing vertically correspond to an example of the vertical swing link of the present invention. The crank arm 85 corresponds to an example of the vertical swing member of the present invention, and the crank arm drive shaft 89 corresponds to an example of the vertical swing drive shaft of the present invention.

  Accordingly, the front swing arm 80, the left rear swing arm 81, the right rear swing arm 99, the upper arm 82, the lower left arm 83, and the lower right arm 97 are all parallel link mechanisms. Maintains a vertically oriented posture, and its lower end operates by drawing a planting locus 17, so that the seedlings received in the planting tool 28 can be planted on the ridge U in a proper posture.

  In the planting device 19 according to the present embodiment, the position of the rotating lower shaft 96 to which the lower left arm 83 is connected is arranged in front of the rotating upper shaft 95 to which the upper arm 82 is connected. doing.

By disposing the rotating lower shaft 96 in front of the rotating upper shaft 95, it is possible to suppress the interval between the upper arm 82 and the lower left arm 83 from being narrowed when the planting tool 28 is lowered.
With this configuration, when the planting tool 28 is near the bottom dead center, the distance between the upper arm 82 and the lower left arm 83 can be maintained wide, so that stable planting can be performed without rattling in the planting state. The

  The upper arm 82 corresponds to an example of the vertically swinging link disposed above in the present invention, and the lower left arm 83 corresponds to an example of the vertically swinging link disposed below in the present invention. Further, the rotating upper shaft 95 corresponds to an example of the first fulcrum of the present invention, and the rotating lower shaft 96 corresponds to an example of the second fulcrum of the present invention.

  In the planting device 19 of the present embodiment, the swing cam drive shaft 88 and the crank arm drive shaft 89 are disposed at substantially the same height. The upper rear shaft 90 penetrating the planting drive transmission case 106 from side to side is disposed at a position below a straight line connecting the center positions of the swing cam drive shaft 88 and the crank arm drive shaft 89. .

  The driving force transmitted from the planting device drive case 27 to the planting drive transmission case 106 is transmitted to the swing cam drive shaft 88. In the planting drive transmission case 106, the driving force of the swing cam drive shaft 88 is also transmitted to the crank arm drive shaft 89 via the transmission chain 107.

  The transmission chain 107 circulates around the upper rear shaft 90 in the planting drive transmission case 106, and the upper rear shaft 90 connects the center positions of the swing cam drive shaft 88 and the crank arm drive shaft 89. Since it is arranged at a position below the straight line, even if the transmission chain 107 is loosened, it does not hit the upper rear shaft 90, and the driving force can be stably transmitted to the crank arm driving shaft 89. Further, by arranging in this way, the swing cam drive shaft 88, the crank arm drive shaft 89, and the upper rear shaft 90 can be arranged in a compact manner.

  Next, the opening / closing operation of the planting tool 28 will be described. When the opening / closing drive cam 100 rotates clockwise with the rotation of the swing cam drive shaft 88 and the peripheral edge of the open / close drive cam 100 contacts the opening / closing roller 102, the opening / closing drive cam 100 opens and closes according to the shape of the peripheral edge. A force that rotates counterclockwise about the upper shaft 92 acts on the arm 101.

  As the opening / closing arm 101 rotates counterclockwise, a pulling force acts on the connecting rod 103 toward the opening / closing arm 101, and the counter arm 104 rotates counterclockwise around the rotation upper shaft 95. A rotating force acts on the. As the counter arm 104 rotates counterclockwise, a force for raising the pin 105 acts. When an upward force is applied to the pin 105, the lower portion of the planting tool 28 opens, and the seedling received in the planting tool 28 falls.

  When the upward force is not applied to the pin 105, the planting tool 28 is configured to maintain the closed state of the lower portion, and when the upward force is applied to the pin 105. The lower part is open.

The counter arm 104 and the pin 105 correspond to an example of the opening / closing mechanism of the present invention.
In planting device 19 of the present embodiment, the turning radius L ₁ of the opening and closing for the output arm of the planting device 28 side (counter arm 104), for opening and closing the input arm of the planting drive transmission case 106 side (the opening and closing arm 101 It is made smaller than turning radius L ₂₎ of.

By making the turning radius L ₁ of the counter arm 104 smaller than the turning radius L ₂ of the opening / closing arm 101, the counter arm 104 is rotated at a turning angle larger than the turning angle around the upper shaft 92 of the opening / closing arm 101. It rotates about the rotation upper shaft 95.

Therefore, the planting tool 28 can be opened and closed with a smaller rotation angle of the open / close arm 101 than in the prior art.
In addition, since the rotational displacement amount of the opening / closing arm 101 for opening and closing the planting tool 28 can be reduced, the peripheral shape of the opening / closing drive cam 100 for moving the opening / closing roller 102 is changed to a shape having a small radius change amount. Thus, the opening / closing drive cam 100 can be reduced in size.

  Further, since the counter arm 104 can be shortened, the seedling guide 108 can be lowered and the position of the supply turntable 32 can be lowered. Moreover, the stroke of the raising / lowering link mechanism 29 can be lengthened, and the width | variety of the vertical motion of the planting tool 28 can be enlarged.

The open / close arm 101 corresponds to an example of the input arm of the present invention, and the counter arm 104 corresponds to an example of the output arm of the present invention. Further, the rotation radius L ₂ of the opening and closing arm 101 of the present invention corresponds to an example of a length from the rotation center of the input arm to a position where connecting rod is connected to the input arm. Further, the rotation radius L ₁ counter arm 104, the present invention corresponds to an example of a length from the rotation center of the output arm to a position where connecting rod is connected to the output arm.

It is a figure explaining the locus | trajectory to which the front-end | tip part of the planting tool 28 seen from the back of the body moves.
The lower part of the planting tool 28 is composed of the left member 109L and the right member 109R. When the planting tool 28 is lowered, the distal ends of the left member 109L and the right member 109R are separated and opened. Planting.

The locus of the distal end portion of the left member 109L is indicated by a broken line, and the locus of the distal end portion of the right member 109R is indicated by a two-dot chain line.
The left member 109L and the right member 109R are opened near the bottom dead center of the planting tool 28 to plant the seedlings, then risen open and closed before the seedlings are supplied from the supply turntable 32, The next seedling is supplied into the planting tool 28.

The planting device 19 can freely adjust the opening / closing timing and the opening / closing speed of the planting tool 28 by changing the peripheral shape of the opening / closing drive cam 100.
When the left member 109L and the right member 109R are opened, an upward speed component is generated along with a speed component in the left-right direction at the tip portions thereof. On the other hand, a downward speed component is generated in the entire planting tool 28 by the lifting link mechanism 29 until reaching the bottom dead center.

  In the present embodiment, when the planting tool 28 is opened, the upward speed component generated at the respective tip portions of the left member 109L and the right member 109R and the part where the planting tool 28 does not open and close, for example, on the rotation top The shape of the opening / closing drive cam 100 and the mounting angle to the swing cam drive shaft 88 so that the downward speed components at the mounting portions of the shaft 95 and the rotating lower shaft 96 are equal, that is, the speed components are canceled out. Is set.

  When the planting tool 28 is opened, the vertical velocity components at the tip portions of the left member 109L and the right member 109R become zero, so that the tip portions of the left member 109L and the right member 109R Will move horizontally.

Therefore, a flat hole is formed in the field scene by opening each tip portion of the left member 109L and the right member 109R, and the seedling can be planted cleanly.
It is the graph which showed the locus | trajectory of the front-end | tip part of the right side member 109R of the planting tool 28 seen from the back of the body.

The locus of the distal end portion of the right member 109R when the opening amount of the planting tool 28 is maximized is indicated by a solid line, and the locus of the distal end portion of the right member 109R when the opening amount is minimized is indicated by a broken line.
The tip of the left member 109L (not shown) moves so as to draw a left-right symmetrical locus with the tip of the right member 109R.

  When the planting tool 28 is opened, the tip of the right member 109R moves with almost no change in position in the vertical direction. Therefore, the tip of the right member 109R and the tip of the left member 109L are almost flat in the field. Is formed.

  In addition, after the planting tool 28 descends and the tip portions of the left member 109L and the right member 109R come into contact with the field scene, the planting tool 28 receives resistance from the field due to the downward movement of the planting tool 28, and the left side. The movement in the opening direction of the member 109L and the right member 109R is assisted. In consideration of the assisting force received from the field, the planting tool 28 is opened at a timing and speed that is slower than the timing at which the vertical velocity component at the tip portions of the left member 109L and the right member 109R is theoretically zero. By doing so, it is possible to actually form a flat hole in the field.

  That is, in consideration of the assisting force received from the field, when the distal end portion of the planting tool 28 enters the field, the distal end portion of the left member 109L and the right member 109R when the planting tool 28 opens is generated upward. By setting the speed component to be smaller than the downward speed component of the portion where the planting tool 28 is not opened and closed, a flat hole can actually be formed in the field.

Since the tip portions of the left member 109L and the right member 109R are pushed into the field while the planting tool 28 is opened, the seedlings can be easily released from the planting tool 28.
Next, the detailed configuration and operation of the hole making body vertical movement mechanism of the tobacco seedling transplanter 10 will be described.

  The hole making body 110 is lowered before the seedling is planted in the field by the planting tool 28, and forms a concave hole that is shallower than the depth of the seedling to be planted around the position where the seedling is planted. The hole-making body 110 has a shape in which a U-shaped internal space is formed in a plan view, and has a structure in which a shallow concave hole is formed in a field scene when the lower part enters the field.

The hole-forming support frame 111 having the hole-forming body 110 fixed to the tip is pivotally attached to the main frame 22 at the other end so that the hole-forming body 110 can move up and down.
A base portion of a hole-making rod 112 provided upward is connected to a middle portion of the hole-making support frame 111 so as to be rotatable. The hole making body rod 112 has a hole making lift pin 120 standing above it, and is engaged with a rod lift plate 119 formed at the end of the hole making lift arm 113 by the hole making lift pin 120. The other end of the hole making lift arm 113 is pivotally attached to a hole making arm support shaft 114 protruding from the side surface of the planting drive transmission case 106.

  In addition, a drilling body drive cam 115 is provided which rotates fixedly to a crank arm drive shaft 89 protruding leftward from the planting drive transmission case 106. A hole-rotating roller 116 that is rotatably provided in the middle of the arm of the hole-making lift arm 113 is disposed so as to contact the peripheral edge of the hole-making body driving cam 115, and the hole-making body rod 112. The vertical position is a position corresponding to the position at which the hole making rotation roller 116 contacts the hole making body drive cam 115.

The hole making rotation roller 116 is disposed in front of the crank arm drive shaft 89 that is a fulcrum of the hole making body drive cam 115.
By arranging the hole making rotation roller 116 in front of the fulcrum of the hole making body drive cam 115, when the hole making rotation roller 116 descends in response to contact with the hole making body drive cam 115, When the hole making rotation roller 116 is raised, it smoothly rises. When the hole making rotation roller 116 is lowered, the hole making body rod 112 is rapidly lowered, so that the hole making body 110 easily enters the field.

  The hole making body drive cam 115 is disposed between the lower left arm 83 and the lower right arm 97. By arranging the hole making body drive cam 115 between the lower left arm 83 and the lower right arm 97, the structure of the hole making body vertical movement mechanism can be reduced in size.

  The hole making support frame 111 is an example of the support frame of the present invention. The hole making body driving cam 115 corresponds to an example of the hole making body vertical movement member of the present invention, and the hole rotation roller 116 corresponds to an example of the driven contact member of the present invention.

  The boring body rod 112 is always subjected to a downward force due to the weight of the boring body 110 and the boring support frame 111, but is further increased by a push spring 118 arranged so that the boring body rod 112 passes inside. It is biased downward.

  A stopper 117 provided with a round hole for passing the hole-making rod 112 is fixed to the planting drive transmission case 106. On the other hand, a load adjustment pin 122 is attached to the lower portion of the hole making rod 112, and the push spring 118 is disposed between the stopper 117 and the load adjustment pin 122.

The pressing spring 118 corresponds to an example of the pressing spring of the present invention.
Since the stopper 117 is fixed to the planting drive transmission case 106, a downward force is applied to the load adjusting pin 122 by the push spring 118, and the hole-making body rod 112 is urged downward, and the hole-making body rod 112. The hole making body 110 and the hole making support frame 111 connected to the lower part are biased downward.

  The load adjusting pin 122 can change the attachment position to the hole making rod 112, and the load to the hole making body 110 and the hole making support frame 111 can be adjusted by the attachment position. As the load adjustment pin 122 is attached upward, the urging force of the push spring 118 increases, and the load applied to the hole making body 110 and the hole making support frame 111 can be increased.

  A stopper pin 121 for defining the lowest position of the hole making body 110 is attached to the upper part of the hole making body rod 112. The hole-making body rod 112 is regulated so as not to descend from the position where the stopper pin 121 contacts the upper surface of the stopper 117, and the position of the hole-making body 110 at that time is the lowest position of the hole-making body 110. Thereby, the hole of the same depth can always be created in the field scene by the hole making body 110.

  The stopper pin 121 can change the attachment position to the hole-making body rod 112, and the lowest position of the hole-making body 110, that is, the depth of the hole to be created can be adjusted by the attachment position. . As the stopper pin 121 is attached to the upper side, the length from the stopper pin 121 to the connection position with the hole making support frame 111 becomes longer, and the hole making body 110 descends further downward to create a deeper hole.

  The stopper 117 is formed with a round hole through which the hole making rod 112 passes. On the other hand, the hole for passing the hole-making rod 112 of the rod lift plate 119 of the hole-making lift arm 113 is a long hole that is long in the front-rear direction.

  By swinging the hole making lift arm 113, the hole making body rod 112 moves back and forth at the engagement portion between the hole making lift arm 113 and the hole making body rod 112. Therefore, the hole making body rod 112 of the rod lift plate 119 is moved. Although the hole through which the hole is made is a long hole, the hole through which the hole making body rod 112 of the stopper 117 is passed is a round hole, thereby preventing the whole body making body rod 112 from moving back and forth.

  In the present embodiment, when the hole making body 110 is lowered, the hole making body rod 112 is configured to be inclined backward, and the hole making body 110 is pushed toward the field.

  Further, when the hole making body 110 contacts the field, the angle formed by the hole making body rod 112 and the hole making support frame 111 is a right angle in a side view. By configuring in this way, it is possible to efficiently apply the urging force by which the hole making rod 112 descends to the hole making support frame 111 and the hole making body 110.

In addition, a hole making scraper 123 is disposed above the hole making body 110.
The hole making scraper 123 is disposed at a position where the tip of the hole making scraper 123 contacts the front surface portion of the hole making body 110 when the hole making body 110 moves upward.

The lump attached to the front surface of the hole making body 110 when creating a hole in the field is removed by contacting the hole making scraper 123 when the hole making body 110 rises after the hole making.
Next, the operation of the hole making body vertical movement mechanism configured as described above will be described.

  With the rotation of the crank arm drive shaft 89, the hole making body drive cam 115 rotates, and the hole making lift arm 113 is centered on the hole making arm support shaft 114 in accordance with a change in the shape of the peripheral edge of the hole making body drive cam 115. Rotate as

  As the hole making lift arm 113 rotates, the hole making body rod 112 that engages with the tip of the hole making lift arm 113 moves up and down. Then, the hole making body 110 moves up and down via the hole making support frame 111 in accordance with the vertical movement of the hole making body rod 112.

  The hole making body drive cam 115 rotates together with the crank arm drive shaft 89 that drives the crank arm 85 that controls the vertical movement of the elevating link mechanism 29 that moves the planting tool 28 up and down. It moves up and down in synchronization with the up-and-down movement of 28.

  The timing of the vertical movement of the hole making body 110 relative to the lifting / lowering operation of the planting tool 28 can be freely set by the outer peripheral shape of the hole making body driving cam 115. In addition, in the large-diameter portion of the hole-forming body drive cam 115 formed so as to maintain the hole-forming body 110 in the upward movement position, by providing irregularities on the outer peripheral shape, the hole-forming body 110 is lifted up and down with the ground surface The soil adhering to the hole making body 110 can be dropped.

  When the planting tool 28 is in the raised position, that is, when the seedling is supplied from the supply cup 33 to the planting tool 28, the hole making body 110 is also lifted upward, and the planting tool 28 is lowered and planted. When it is in the position, the hole making body 110 is set to a position where it is lowered to a position below the farm scene. At this time, by setting the lower surface of the hole making body 110 to a position slightly above the tip position of the planting tool 28, the seedling is planted in the field to a sufficient depth, and the seedling planted by the hole making body 110 is planted. A shallow dent can be formed in the field around the strain.

  By the hole making body vertical movement mechanism of the present embodiment, a shallow dent hole can be formed around the seedling planted by the planting tool 28, and after the seedling is planted or simultaneously with the planting, the seedling Water can be irrigated, fertilizer can be applied, and chemicals can be applied in shallow concave holes formed around the plant, so that planted seedlings can be easily cultivated and managed.

  Further, since the drilling body vertical movement mechanism is operated by the crank arm drive shaft 89 that is the drive shaft for moving the planting tool 28 up and down, the planting tool 28 and the hole making body 110 are driven by the same drive shaft. This reduces the drive timing error between the two, making it possible to plant seedlings well and to form shallow concave holes around the seedlings, facilitating the survival and management of the seedlings after transplanting. become.

  And the unraveling tool 151 which unwinds the soil of the front position of the hole making body 110 is provided. The unraveling tool 151 is composed of a rod-like body in a forward-downward posture, and is pivoted up and down integrally with the pivot fulcrum shaft 152 at the rear end, and the sharp portion 151a at the front end is in the soil when pivoted downward. It is configured to enter. The rotation fulcrum shaft 152 is rotatably attached to an attachment stay 153 attached to the main frame 22. A left and right link shaft 154 is fixed (welded) to the front and rear intermediate portion of the unraveling tool 151, and a part of the link shaft 154 is positioned above the hole making support frame 111. Therefore, when the hole-forming support frame 111 rotates upward when the hole-forming body 110 moves up, the hole-forming support frame 111 pushes up the linkage shaft 154, and the unlocking tool 151 rotates upward. When the hole making support frame 111 rotates downward when the hole making body 110 moves downward, the linkage shaft 154 also follows and moves downward due to its own weight. Then rush into the soil and unravel the soil. Therefore, the unraveling tool 151 moves up and down in conjunction with the vertical movement of the hole making body 110. In addition, the unraveling tool 151 is configured to be forwardly lowered and provided with a pivot fulcrum shaft 152 at the rear end portion, so that the sharp end portion 151a of the front end is likely to enter into the soil without rotating darkly. . Since the downward rotation of the solver 151 is restricted by the linkage shaft 154 and the hole making support frame 111, the depth of the solver 151 that enters the soil can be appropriately restricted. On the contrary, the unraveling tool 151 is a resistance that rushes into the soil and acts to unravel, and seems to rotate further downward, but due to the resistance, via the linkage shaft 154 and the drilling support frame 111 The hole making body 110 also seems to rotate further downward. Therefore, the unraveling tool 151 and the hole making body 110 can be reliably plunged into the soil.

  Next, a different form of the solver 151 will be described. The unraveling tool 151 has a configuration in which unraveling plates 156 are provided at both left and right ends of a support shaft 155 fixed (welded) to the hole-forming support frame 111. Accordingly, the unroller 151 rotates up and down in conjunction with the up and down movement of the hole making body 110 since it rotates together with the hole making support frame 111 and the hole making body 110. The left and right tear plates 156 are arranged at positions on the left and right outer sides than the hole making body 110. Accordingly, the distance between the right and left unrolling plates 156 that is the left and right width of the unraveling tool 151 is larger than the left and right width of the hole making body 110, and the region where the hole making body 110 is formed Therefore, the hole making body 110 can reduce the resistance of the hole making and can make the hole appropriately and smoothly.

It should be noted that the unraveling tool 151 and the hole making body 110 are arranged at an interval in the front-rear direction so that the soil rising on the front side of the hole making body 110 is not placed on the unraveling tool 151.
The hole-making body 110 has a mountain shape (V-shaped) with a sharp front end in plan view, but the left and right plate bodies 110a positioned at the rear of the hole-making body 110 are rotated left and right around the fulcrum 157 at the upper end. It is good also as a structure which moves. When the hole making body 110 enters the soil and makes a hole, the left and right plate bodies 110a are rotated inward left and right due to soil resistance from the left and right outer sides. As a result, when the plate body 110a receives soil resistance due to a large amount of soil that is pushed to the left and right by the hole making body 110, the plate body 110a is rotated inward in the left-right direction according to the soil resistance. Therefore, it is possible to prevent the soil pushed by the hole making body 110 from being made smaller and to return to the hole from above the hole making body 110, thereby forming a hole in which water easily collects. The plate body 110a is urged outward in the left-right direction by a spring, and is disposed on the inner side in the left-right direction of the hole making body 110 body. It is regulated.

  On the contrary, if the plate 110a is urged inward in the left-right direction by a spring and arranged outside in the left-right direction of the main body 110, the soil is pressed outward in the left-right direction by the plate 110a. Holes that do not collapse easily can be formed reliably. Further, the planting tool 28 is moved down into the hole making body 110 by the vertical movement mechanism 19 to plant the transplant, but the driving tool 158 is provided in the planting tool 28 and the plate body 110a is driven and linked. It is good also as a structure which provides the member 159, pushes the driven connection member from the upper side by the downward movement of the planting tool 28, opens the left and right plate bodies 110a to the left and right outer sides, and presses the soil to the left and right outer sides.

  In the above description, the structure in which the hole making body 110 is moved up and down by the hole making body driving cam 115 has been described. However, the hole making body rod 112 is pulled up by the lower left arm 83 or the upper arm 82 of the vertical movement mechanism 19. 110 may be configured to move up. Thereby, the vertical movement of the planting tool 28 and the hole making body 110 can be synchronized with high accuracy. At this time, it is desirable to link the lower left arm 83 or the upper arm 82 and the hole making rod 112 via a buffer spring provided on the hole making rod 112. It is preferable that the buffering spring has a configuration capable of adjusting the load.

  Further, the hole making body rod 112 passes through the airframe side restricting member provided on the airframe side, and a downward movement restricting member for restricting the downward movement of the hole making body 110 is provided on the hole making body rod 112, By making contact with the airframe side regulating member from above, it is possible to regulate so that the hole making body 110 does not move further down. Moreover, the downward movement restricting position of the hole making body 110 can be adjusted by providing the downward movement restricting member on the hole making body rod 112 so that the vertical position can be adjusted.

  Also, if the hole-forming support frame 111 has a bent configuration in which the rear portion is bent downward, and the hole-forming body 110 is provided in the lower part of the portion extending downward, the hole-forming support frame that is on the front side of the bent portion. Since most of 111 is higher than the hole making body 110, most of the hole making support frame 111 can be positioned on the ground when the hole making body 110 moves down and enters the soil. It is possible to prevent soil from being placed on the support frame 111. In addition, since the rear part of the hole support frame 111 extends in the vertical direction due to the bent structure of the hole support frame 111, a position adjusting structure for adjusting the position of the hole body 110 along the rear part is easy. Therefore, it is easy to adjust the drilling depth.

Next, in the tobacco seedling transplanter 10 of the present embodiment, the configuration and operation of a mechanism that controls the height of the aircraft to be constant with respect to the field scene will be described.
The balance connecting stay 51 is a plate-like connecting stay that is perpendicular to the axial direction of the connecting stay round shaft portion 61 in the middle of the cylindrical connecting stay round shaft portion 61 bent at a right angle. A connecting stay round shaft portion 61 is penetrated to one end portion of the plate portion 60 and fixed by welding. The bent shaft portion of the connecting stay round shaft portion 61 and the connecting stay plate portion 60 are configured to be V-shaped in a side view. In addition, a cylindrical hydraulic rod connecting portion 62 is erected at the other end of the connecting stay plate portion 60.

  The shaft portion of the connecting stay round shaft portion 61 on the side to which the connecting stay plate portion 60 is fixed is pivotable to the tip portion of the right ground support bar 59 so that the axial direction thereof is the left-right direction of the machine body. In addition, the shaft portion serves as a rotation shaft of the right ground contact position detector 37.

  The balance 50 includes a long cylindrical balance rod portion 63 and a short cylindrical balance boss portion 64. The outer peripheral surface of the balance rod portion 63 is arranged at the central portion in the longitudinal direction of the balance rod portion 63 so that the height direction of the cylindrical shape of the balance boss portion 64 is perpendicular to the longitudinal direction of the balance rod portion 63. It is fixed by welding.

  The right ground contact position detector 37 has a right balance connecting plate 71 and a right rotation shaft support plate 72 standing on the front right side of the surface of the curved right ground plate 70 in contact with the farm scene opposite to the surface in contact with the farm scene. Has been established.

  The right balance connecting plate 71 and the right rotating shaft support plate 72 are formed with rotating shaft holes, and the connecting stay round shaft portion 61 of the balance connecting stay 51 is passed through these two rotating shaft holes. Thus, the right grounding plate 70 rotates up and down around the connecting stay round shaft 61.

In addition, a long groove hole for engaging one end portion of the balance rod portion 63 of the balance 50 is formed in the upper portion of the right balance connecting plate 71.
The left ground contact position detector 36 has a left balance connecting plate 66 and a left rotation shaft support plate 67 standing on the front right side of the surface of the curved left ground plate 65 in contact with the farm scene opposite to the surface in contact with the farm scene. Has been established. In the plan view, the hole making support frame 111 is disposed between the right ground plate 70 and the left ground plate 65, and the hole body 110 is disposed behind the right ground plate 70 and the left ground plate 65. This is a structure in which the length control connecting mechanism and the hole making device are arranged in a compact manner.

  Even when the hole making body 110 is moved downward, the hole making support frame 111 extends back and forth above the lower end of the right grounding plate 70 and the lower end of the left grounding plate 65 in a side view of the machine body. Therefore, since the hole making support frame 111 is not grounded from the front side near the right ground plate 70 and the left ground plate 65, the right ground plate 70 and the left ground plate 65 are properly set by the soil that the hole making support frame 111 is grounded and pressed. It is possible to prevent the detection from being lost, and to properly control the height of the aircraft. Further, in order to appropriately control the height of the machine body, the right ground plate 70, the left ground plate 65, and the borehole are prevented from acting on the right ground plate 70 and the left ground plate 65 with the soil that the hole making body 110 pushes forward. It is desirable that the body 110 be spaced apart from the front and rear. Further, if a rising portion is formed by raising the rear portions of the right ground plate 70 and the left ground plate 65 upward, the soil that the hole making body 110 pushes forward reaches the positions of the right ground plate 70 and the left ground plate 65. Even so, the soil can be received at the rising portion, and the detection of the right ground plate 70 and the left ground plate 65 can be prevented from being adversely affected.

  Moreover, the soil control tool comprised with a boat-shaped iron plate can be provided in the front side of the hole making body 110, and it can prevent that the earth bites into the hole making support frame 111. FIG. Further, if the soil regulating tool is arranged at the connecting portion between the hole making body rod 112 and the hole making support frame 111, the soil regulating tool acts as a reinforcing member for the hole making support frame 111.

  A rotation shaft hole is formed in the left balance connecting plate 66 and the left rotation shaft support plate 67. A grounding body rotation shaft 52 that is fixed to the front end portion of the left grounding body support bar 54 and extends in the left-right direction of the machine body is passed through these two rotation shaft holes and is centered on the grounding body rotation shaft 52. The left ground plate 65 rotates up and down.

In addition, a long groove hole for engaging the other end portion of the balance rod portion 63 of the balance 50 is formed in the upper portion of the left balance connecting plate 66.
A connecting stay connecting shaft 75 is provided at one end of the hydraulic rod 55 in a direction perpendicular to the longitudinal direction of the hydraulic rod 55, and a rotating stay connecting hole 76 for connecting to the rotating stay 56 at the other end. Is formed.

By inserting the connecting stay connecting shaft 75 into the cylindrical shape of the hydraulic rod connecting portion 62, the hydraulic rod 55 is rotatably connected to the balance connecting stay 51.
The balance boss portion 64 of the balance 50 is inserted into the bent shaft portion of the connecting stay round shaft portion 61, that is, the shaft portion forming a V shape with the connecting stay plate portion 60 in a side view, and the shaft of the connecting stay round shaft portion 61 is inserted. The balance 50 can slide in the direction. Further, both end portions of the balance rod portion 63 of the balance 50 are engaged with the respective long groove holes of the left ground contact position detector 36 and the right ground contact position detector 37, and the respective end portions are movable in the long groove holes. It has become.

  A grounding body rotation shaft 52 extending in the left-right direction of the machine body is fixed to the left grounding body support bar 54, and a shaft portion serving as a rotation shaft of the connecting stay round shaft portion 61 is a grounding body rotation shaft 52. Are pivotally supported by the right grounding body support bar 59 at a coaxial position, so that the left grounding position detection body 36, the right grounding position detection body 37, and the balance connecting stay 51 are centered on the left and right coaxial. Rotate.

  The rotation stay 56 is attached so as to freely rotate about a rotation stay shaft 58 provided on the main frame 22. The hydraulic rod 55 is connected to the hydraulic rod connecting portion 62 of the balance connecting stay 51 by a connecting stay connecting shaft 75 provided at one end, and is connected to one end of the rotating stay 56 by a rotating stay connecting hole 76 formed at the other end. It is connected.

Further, the other end of the rotation stay 56 is connected to the connecting rod 57, and the other end of the connecting rod 57 is connected to the hydraulic pressure switching valve unit 24.
In response to the vertical movement of the connecting rod 57, the hydraulic lifting cylinder 23 is operated via the lifting control switching valve provided in the hydraulic switching valve portion 24, and the left and right rear wheels 14 are lifted and lowered.

Next, the operation of the mechanism for controlling the height of the airframe thus configured to be constant will be described.
When planting a seedling, when the upper surface of the cocoon U approaches the aircraft, the left ground plate 65 and the right ground plate 70 are pushed up along the upper surface of the cocoon U, and when the upper surface of the cocoon U moves away from the aircraft, Then, the left ground plate 65 and the right ground plate 70 are lowered.

Here, a case will be described in which the left ground plate 65 and the right ground plate 70 are pushed up with the upper surface of the heel U approaching the aircraft.
When the left ground plate 65 and the right ground plate 70 are pushed up, the left ground position detection body 36 and the right ground position detection body 37 are centered on the ground body rotation shaft 52 and the connecting stay round shaft portion 61 that are coaxial in the left-right direction. It rotates counterclockwise.

  When the left ground contact position detection body 36 and the right ground contact position detection body 37 rotate counterclockwise, a force in the forward direction of the fuselage is applied to the balance rod portion 63 whose both ends are engaged with the long groove holes, and the balance 50 is moved forward of the fuselage. Force is applied to the connecting stay round shaft portion 61 penetrating the balance boss portion 64, so that the balance connecting stay 51 is connected to the connecting stay round shaft portion 61 arranged in the left-right direction. It rotates counterclockwise around the center.

  When the balance connecting stay 51 rotates counterclockwise, a force to move the hydraulic rod 55 forward is applied, and the rotating stay 56 connected to the other end of the hydraulic rod 55 is centered on the rotating stay shaft 58. Rotate clockwise. When the rotating stay 56 rotates clockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves upward.

  When the connecting rod 57 moves upward, the hydraulic pressure switching valve unit 24 connected to the other end of the connecting rod 57 operates the hydraulic lifting cylinder 23 via the lifting control switching valve, and the left and right rear wheels 14 are lowered.

When the left and right rear wheels 14 are lowered, the airframe rises with respect to the upper surface of the heel U, and the distance between the airframe and the upper surface of the heel U can be kept constant.
If the upper surface of the cocoon U moves away from the aircraft during planting of the seedlings, the left ground plate 65 and the right ground plate 70 are lowered along the upper surface of the cocoon U, and the left ground position detector 36 and the right ground position The detection body 37 rotates in the clockwise direction, and operates in the opposite manner to the above case in which the upper surface of the bag U approaches the body. That is, in this case, the connecting rod 57 moves downward, and the hydraulic pressure switching valve unit 24 operates the hydraulic lifting cylinder 23 via the lifting control switching valve to raise the left and right rear wheels 14. That is, in this case, the airframe descends with respect to the upper surface of the heel U, and the distance between the airframe and the upper surface of the heel U is kept constant.

  By controlling in this way, even if the upper surface of the cocoon U approaches or moves away from the aircraft, the distance between the aircraft and the upper surface of the cocoon U is kept constant, so that the seedling planting is too deep or too shallow. You can avoid it.

  The left grounding body support bar 54 and the right grounding body support bar 59 are attached to a frame support shaft 73 that is fixed to the airframe and arranged in the left-right direction. The shaft 73 can be turned around. By rotating the planting depth rod 53 back and forth, the left grounding body support bar 54 and the right grounding body support bar 59 also rotate together, and the left grounding body support bar 54 and the right grounding body support bar 59. The vertical position of the tip of the can be changed. Then, according to the rotation positions of the left grounding body support bar 54 and the right grounding body support bar 59, the grounding body rotating shaft 52 fixed to the front ends of the left grounding body support bar 54 and the right grounding body support bar 59, and The vertical position of the pivoted connecting stay round shaft 61 changes.

  Therefore, by adjusting the rotation position of the planting depth rod 53 back and forth, the vertical position of the rotation center axis of the left ground contact position detector 36 and the right ground contact position detector 37 can be changed. Depending on the planting depth, a constant distance between the aircraft and the upper surface of the ridge U can be adjusted.

  Further, in the upper rear part of the right balance connecting plate 71, three load defining holes 74 are formed in a row, and the front end of the right tension spring 69 whose rear end is fixed to the frame support shaft 73 is either The load regulating hole 74 is locked.

  The right tension spring 69 applies an urging force that rotates the right ground contact position detector 37 clockwise. By changing the position of the load regulating hole 74 that locks the front end of the right tension spring 69, the urging force applied to the right ground contact position detector 37 changes. That is, according to the position of the load regulating hole 74 that locks the front end of the right tension spring 69, the ground load on the field of the right ground position detection body 37 can be adjusted. And the control sensitivity of the raising / lowering control changes according to the adjustment of the contact load of the right contact position detector 37.

  Similarly, with respect to the left ground contact position detection body 36, three load regulating holes 74 are formed vertically in the rear upper part of the left balance connecting plate 66, and the rear end is fixed to the frame support shaft 73. The front end of the spring 68 is locked in one of the load regulation holes 74 so that the ground contact load on the field of the left ground contact position detector 36 can be adjusted.

  Next, an operation when only one of the left ground contact position detection body 36 and the right ground contact position detection body 37 detects a change in the distance from the machine body to the top surface of the kite U due to a rough field and a clump of soil will be described. .

Here, as an example, a case will be described in which the position of the upper surface of the kite U with respect to the aircraft on the left ground plate 65 side does not change, and there is a lump on the kite U on the right ground plate 70 side.
If there is a clot on the right side of the ridge U with which the right ground plate 70 is in contact, the right ground plate 70 is pushed up along the clot, and only the right ground position detector 37 is a connecting stay round shaft arranged in the left-right direction. It rotates counterclockwise around the part 61.

  When the right ground contact position detector 37 rotates counterclockwise, a forward force is applied to one end portion of the balance rod portion 63 engaged with the long groove hole of the right ground contact detector 37, and the balance 50 is subjected to the body. A forward force is applied. At this time, since the left ground contact position detector 36 does not rotate, a force for moving forward is not applied to the other end side of the balance rod portion 63 engaged with the long groove hole of the left ground contact detector 36. Since the balance boss portion 64 of the balance 50 is fixed to the center position of both ends of the balance rod portion 63, the balance boss portion 64 moves a distance that is half of the movement distance of one end portion of the balance rod portion 63.

  Therefore, the connecting stay round shaft portion 61 penetrating the balance boss portion 64 is applied with a forward force corresponding to half the moving distance of one end portion of the balance rod portion 63. The balance connecting stay 51 rotates counterclockwise around the connecting stay round shaft portion 61 disposed in the left-right direction according to the forward force of the machine body.

  When the balance connecting stay 51 rotates counterclockwise, a force to move the hydraulic rod 55 forward is applied, and the rotating stay 56 connected to the other end of the hydraulic rod 55 is centered on the rotating stay shaft 58. Rotate clockwise. When the rotating stay 56 rotates clockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves upward. At this time, the upward movement amount of the connecting rod 57 is a movement amount corresponding to half the movement distance of the one end portion of the balance rod portion 63.

  Corresponding to the upward movement amount of the connecting rod 57, the hydraulic switching valve portion 24 connected to the other end of the connecting rod 57 operates the hydraulic lifting cylinder 23 via the lifting control switching valve, and the left and right rear wheels 14 are moved. As the aircraft is lowered, the aircraft rises relative to the upper surface of the kite U.

At this time, the amount by which the aircraft rises with respect to the upper surface of the kite U is half of the amount of change approaching the kite U in the vertical direction detected by the left ground contact position detector 36.
As described above, in the linkage mechanism that controls the height of the airframe of the present embodiment to be constant, the amount of change in vertical movement detected by each of the left ground contact position detector 36 and the right ground contact position detector 37 is averaged. The aircraft is controlled to move up and down according to the amount of change. Since the field scene is detected by averaging the detection by the two left ground contact position detectors 36 and the right ground contact position detector 37 arranged on the left and right, even if there is a clot on the ridge U, the body does not greatly fluctuate vertically Stable lifting control can be performed and lifting control can be optimized.

  In the present embodiment, a case has been described in which a pendulum-type left / right tilt sensor 42 is provided, and the right / left tilt hydraulic cylinder 25 is operated by the detection of the left / right tilt sensor 42 to maintain the traveling machine body horizontally. However, the present invention is not limited to this, and for example, a configuration may be adopted in which a manual rolling adjustment lever for manually controlling the hydraulic cylinder 25 for right and left tilt is provided without including the left and right tilt sensor 42.

In the tobacco seedling transplanting machine 10, the rolling adjustment lever 47 is provided on the portion of the steering handle 16 that can be easily operated with the left hand when the steering handle 16 is held.
The rolling adjustment lever 47 and the left / right inclination switching valve 46 are connected via an inclination adjustment cable 48. In addition, illustration of the adjustment cable 48 for inclination is abbreviate | omitted.

The left / right tilt switching valve 46 is an example of the left / right tilt valve of the present invention, and the tilt adjustment cable 48 is an example of the adjustment cable of the present invention.
The rolling adjustment lever 47 includes an operation lever portion 127 that is operated by hand, and an adjustment arm portion 128 that is formed to extend from the middle of the operation lever portion 127 in a perpendicular direction. A portion connected to the adjustment arm portion 128 of the operation lever portion 127 is rotatably supported on a rolling lever support shaft 126 provided on the steering handle 16.

In addition, the part connected with the adjustment arm part 128 of the operation lever part 127 corresponds to an example of the central part of the operation lever part of the present invention.
One end of the operation lever portion 127 opposite to the hand operated side is connected to a neutral return spring 125 that is fixed to the steering handle 16 and is pulled by the neutral return spring 125. . When the operation lever portion 127 is operated by hand and then released from the operation lever portion 127, the rolling adjustment lever 47 returns to the neutral position where the tilt operation is not performed by the urging force of the neutral return spring 125.

One end of an adjustment cable 48 for tilting is connected to the tip of the adjustment arm portion 128.
By rotating the operation lever portion 127 by hand around the rolling lever support shaft 126, the tip of the adjustment arm portion 128 is also rotated, and the inclination adjustment cable 48 is moved in the longitudinal direction accordingly. Then, the movement amount in the longitudinal direction of the inclination adjustment cable 48 is transmitted to the other end side of the inclination adjustment cable 48.

  The rolling adjustment lever 47 is disposed so that the orientation of one end portion of the inclination adjustment cable 48 connected to the adjustment arm portion 128 is parallel to the longitudinal direction of the operation lever portion 127 when in the neutral state. ing. By arranging in this way, it is possible to suppress blurring of the adjustment cable 48 for inclination. Further, since the adjustment arm portion 128 is disposed at a right angle to the operation lever portion 127, the rolling adjustment lever 47 can be accommodated in a compact manner by being arranged in this way.

The other end of the inclination adjustment cable 48 is connected to the other end of the inclination valve connecting bar 130 whose one end is connected to the left / right inclination switching valve 46.
At the other end portion of the inclination adjustment cable 48, a rolling push spring 129 is provided so that the inclination adjustment cable 48 passes through the inside. One end of the rolling push spring 129 is fixed to a spring fixing portion 131 fixed to the airframe, and the connecting portion of the inclination adjusting cable 48 with the inclined valve connecting bar 130 is always pulled away from the spring fixing portion 131. Energized in the direction.

The rolling push spring 129 is an example of the assisting spring of the present invention.
Next, a rolling operation by operating the rolling adjustment lever 47 will be described.

  When the operation lever portion 127 is rotated counterclockwise, the tip of the adjustment arm portion 128 is also rotated counterclockwise, and the inclination adjustment cable 48 is pulled toward the rolling adjustment lever 47 side. At this time, the operation lever portion 127 is operated against the urging force of the neutral return spring 125 and the urging forces of the rolling push spring 129.

  When the inclination adjustment cable 48 is pulled toward the rolling adjustment lever 47, the other end of the inclination adjustment cable 48 moves to the right side in the drawing. Since the end of the tilt valve connecting bar 130 connected to the tilt adjustment cable 48 moves to the right, the left / right tilt switching valve 46 rotates counterclockwise, and the left / right tilt switch valve 46 rotates. In response to the movement, the hydraulic cylinder 25 for tilting left and right operates, for example, the aircraft tilts to the right.

  In the figure, when the operation lever portion 127 is rotated clockwise, the tip of the adjustment arm portion 128 is also rotated clockwise, and the inclination adjustment cable 48 is loosened on the rolling adjustment lever 47 side. At this time, since the operation is performed against the urging force of the neutral return spring 125, the urging force by the neutral return spring 125 does not act, but the rolling adjustment lever 47 is used for tilting left and right by the urging force of the rolling push spring 129. Pulled to the switching valve 46 side.

  When the tilt adjusting cable 48 is pulled toward the left / right tilt switching valve 46, the other end of the tilt adjusting cable 48 moves to the left in the drawing in the drawing. Since the end of the tilt valve connecting bar 130 connected to the tilt adjustment cable 48 moves to the left, the left / right tilt switching valve 46 pivots clockwise, and the left / right tilt switch valve 46 pivots. In response to this, the right / left tilt hydraulic cylinder 25 is actuated, for example, the aircraft is tilted to the left.

In the present embodiment, a neutral return spring 125 having a stronger biasing force than the rolling push spring 129 is used.
As a result, the left / right tilt switching valve 46 can be operated smoothly, and quickly returns to the neutral position when the operation lever portion 127 is released. If the neutral return spring 125 and the rolling push spring 129 having the same urging force are used, the operation of the left / right tilt switching valve 46 is likely to be loose.

  Thus, by providing the manual type rolling adjustment lever 47, the traveling machine body can be inclined to the left side which is the work position side, for example, so that the seedlings placed on the preliminary seedling placement table 30 are always working. Since the workers gather at the worker side, it becomes easier for the worker to replenish the seedlings to the supply cup 33.

  In the above description, the rolling pressing spring 129 is used as the assisting spring of the present invention to pull the tilt adjusting cable 48 to the left / right tilt switching valve 46. However, the tilt adjusting cable 48 and the tilt valve connecting bar 130 You may use the tension spring which pulls the connection part of this from the front.

Further, the tobacco seedling transplanter 10 according to the present embodiment may be provided with a grounding stand.
The ground stand 142 includes a left stand bar 147, a right stand bar 148, a ground stand bar 149, and a stand support shaft 145.

  A grounding stand bar 149 is fixed to ends of the left stand bar 147 and the right stand bar 148 arranged in parallel in a direction perpendicular to the left stand bar 147 and the right stand bar 148. The grounding stand bar 149 is fixed at a position displaced to the left and right center side of the machine body with respect to the left stand bar 147 and the right stand bar 148 so as to be L-shaped when viewed from the front.

  This corresponds to the fact that the main frame 22 on which the left stand bar 147 and the right stand bar 148 are supported is arranged on the right side of the aircraft, and the grounding stand bar 149 is arranged at the left and right center positions of the aircraft. This is because. That is, in the case of the present embodiment, the grounding stand bar 149 is disposed so as to extend from the ends of the left stand bar 147 and the right stand bar 148 to the left side of the aircraft.

  The left stand bar 147 and the right stand bar 148 correspond to an example of a portion that extends downward when the ground contact position of the present invention is set, and the ground stand bar 149 corresponds to an example of the ground contact portion of the present invention.

The grounding stand 142 is supported by being sandwiched between two stand support plates 143 fixed to the rear rising part of the main frame 22 at the rear of the machine body.
The stand support plate 143 is formed with a hole for supporting the stand support shaft 145 and two cutouts 144 for locking the stand locked shaft 146. The stand support shaft 145 supports two stand supports. The plates 143 are connected.

  The left stand bar 147 and the right stand bar 148 are connected by a stand locked shaft 146, and a stand support hole 150 through which the stand support shaft 145 passes is formed. The stand support hole 150 is a long hole, and the position of the stand support shaft 145 in the stand support hole 150 is relatively movable in the long axis direction of the stand support hole 150. The interval between the locked shafts 146 can be changed.

  The stand support shaft 145 and the stand locked shaft 146 are connected by a stand lock spring 140. The stand lock spring 140 biases the stand locked shaft 146 toward the stand support shaft 145 side. doing.

  The stand support plate 143 corresponds to an example of the base plate of the present invention, and the stand locking spring 140 corresponds to an example of the position fixing spring of the present invention. The main frame 22 corresponds to an example of the main body frame of the present invention.

  The stand support shaft 145 passes through the stand support holes 150 formed in the two stand support plates 143, so that the ground stand 142 is rotatably supported by the stand support plate 143, and the stand locking spring 140. The stand locked shaft 146 is locked at the position of the two notches 144 provided on the stand support plate 143 by the urging force, so that the ground stand 142 is temporarily fixed at the ground position and the storage position.

At the time of storage, the ground stand 142 is stored in a posture along the rearwardly rising portion of the main frame 22.
With this configuration, the ground stand 142 can be switched to the ground position and the storage position with a single touch. In addition, since the flip-up direction is set to the rear, the ground stand 142 can be operated without bending.

  Here, two cutouts 144 are provided in each stand support plate 143 and temporarily fixed at the grounding position and the storage position. However, three or more cutouts are provided and three grounding stands 142 are provided. You may make it temporarily fix in the above predetermined position.

Next, the arrangement and mounting structure of the spare seedling placement table 30 in the present embodiment will be described.
The rectangle shown by the broken line in the figure indicates the position of the spare seedling tray 138 placed on the spare seedling placement stand 30, and three spare seedling trays 138 can be placed side by side in the left-right direction on the spare seedling placement stand 30. It is like that.

The preliminary seedling mounting table 30 is arranged so that the position of the rear end of the preliminary seedling mounting table 30 is behind the neutral position of the planting depth lever 49 and the hole making rod 112.
By arranging the preliminary seedling placement table 30 in this way, the preliminary seedling placement table 30 becomes close to the supply turntable 32 and the operation of supplying the seedlings to the supply cup 33 is facilitated.

  The preliminary seedling mounting table 30 includes two preliminary seedling stand columns 135 that are spaced apart from each other at the rear of the center, and the preliminary seedling support reinforcing plate 136 that is attached to the front part of the center. Is attached to the fuselage.

  A rod-shaped spare seedling support column 137 is fixed to the machine body frame in the left-right direction, and each of the spare seedling support columns 135 is set up so that two spare seedling support columns 135 stand on the preliminary seedling support frame 137. Is connected to the preliminary seedling support column support frame 137. In addition, one end of the spare seedling support reinforcing plate 136 is fixed to the body frame, and the support of the preliminary seedling placement table 30 is reinforced.

  In addition, you may provide the irrigation apparatus which irrigates the hole formed with the hole making body 110. FIG. Thereby, a seedling can absorb water reliably immediately after planting, the survival of the seedling is promoted, and cultivation can be performed satisfactorily. The irrigation apparatus includes an irrigation tank that stores water, an irrigation pump that discharges water in the irrigation tank, and an irrigation hose that sends water discharged from the irrigation pump to the position of the bore body 110. The irrigation pump may be electric. The irrigation tank can be placed at the front edge of the aircraft. Electrical components such as an electric irrigation pump and a rectifier are arranged in a hood 160 that covers the engine 11, the main transmission case 12, and the like so as not to get wet by rain. Further, power is supplied from the lighting coil portion of the engine 11 to the electric irrigation pump, and the irrigation pump is driven without providing a special battery. Further, a timing sensor for detecting the phase of the transmission member to the vertical movement mechanism 115 such as the swing cam drive shaft 88 or the crank arm drive shaft 89 is provided, and irrigation is performed in conjunction with detection of the operation timing of the planting tool 28 by the timing sensor. The pump is driven to irrigate when drilling with the hole-making body 110 and when planting the planting tool 28.

  The planting tool 28 is configured to plant the seedling by opening and closing to the left and right. However, if the pivot points of the left part and the right part divided into the left and right parts by opening and closing are arranged on the left and right sides as much as possible, the planting tool 28 is particularly planted. A large opening / closing amount can be obtained at the upper part of the attachment 28, and interference of the planted seedling leaves with the opened attachment 28 can be suppressed as much as possible. Further, if a space is formed by cutting out the upper part of the planting tool 28, specifically, the part that approaches each other when closed at the upper part of the left part and the right part, a planting tool in which the planted seedling leaves are opened. It is possible not to interfere with the upper part of 28.

  In the present embodiment, the tobacco seedling has been described as an example of the transplant object of the present invention, but the transplanter of the present invention can also be applied as a transplant machine for planting a transplant object other than the tobacco seedling. For example, it can be applied as a transplanter for transplanting seed potatoes such as potatoes.

Claims (4)

  A traveling unit (13, 14) for traveling the airframe; a planting tool (28) for planting a transplant object by opening and closing a downward tip; and a vertical movement mechanism (19) for vertically moving the planting tool (28). The hole making body (110) disposed in front of the planting tool (28) and the hole making body vertical movement member (115) for moving the hole making body (110) up and down are provided. A transplanter that is configured to make a hole by moving and plunging into the soil, and is provided with an unwrapping tool (151) for unraveling the soil in front of the hole making body (110).   The transplanter according to claim 1, wherein the unraveling tool (151) is configured to move up and down in conjunction with the vertical movement of the hole making body (110).   The transplanter according to claim 1, wherein the right and left width of the unroller (151) is larger than the left and right width of the hole making body (110).   After the hole making body (110) is moved down, the planting tool (28) is moved down into the hole making body (110), and the hole making body (110) is interlocked with the lowering movement of the planting tool (28). The transplanter according to claim 1, which is configured to open.

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