JP2013215149A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter capable of performing the control of the lifting up and down of a machine body stably, in which even if there are soil lumps, since conventionally, although there is a transplanter controlling the height of a machine body relative to a field surface by relating the movements of a ground-contacting sensor making contact with the field surface with a hydraulic switch valve performing the lifting up and down of the machine body to transplant seedlings by a prescribed planting depth, there is a problem that when there are soil lumps on a ridge, the lifting up and down of the machine body height can not be properly controlled by the constitution for controlling the height of the machine body relative to the ground surface in the conventional transplanter.SOLUTION: A transplanter provided with a transplanting tool 28 for transplanting objects to be transplanted on a machine body including a right and left traveling device 14 operated to be lifted up and down by a lifting device 23, is used to move up and down the lifting device 23 by switching and operating a lifting up and down-switching part 24a based on an average value of detected heights of the field surface measured by right and left ground contact-detecting bodies 36 and 37 arranged on right and left sides relative to the machine progressing direction.

Description

  The present invention relates to a transplanter for transplanting various seedlings such as tobacco seedlings, vegetable seedlings, and flower seedlings, and bulbs such as potato seed pods and raccoons to a field.

  Conventionally, as shown in Patent Document 1, the height of the aircraft relative to the agricultural scene is controlled by associating the movement of the grounding sensor that contacts the agricultural scene with a hydraulic switching valve that moves the aircraft up and down, thereby providing a predetermined planting depth. There is a transplanter that is designed to plant seedlings.

JP 2000-312509 A

  However, in the structure which controls the height of a body with respect to the field scene in the said conventional transplanter, there existed a problem that raising / lowering of the height of a body was not appropriately controlled when there was a clot on the fence.

  That is, since the conventional transplanter is configured to detect a farm scene with a single ground sensor, if there is a clod on the ridge where the transplanter travels, the ground sensor detects the clump and removes it from the aircraft. It is determined that the distance to the farm scene has become smaller. As a result, since the aircraft is controlled to rise, the seedling cannot be planted at an appropriate planting depth.

  An object of the present invention is to provide a transplanter capable of stably controlling the lifting of the aircraft even if there is a clot in consideration of the problems of the conventional transplanter.

In order to solve the above problems, the following technical measures were taken.
That is, the invention according to claim 1 is directed to a transplanting machine provided with a planting tool 28 for planting a transplant object on a machine equipped with a left and right traveling apparatus 14 that moves up and down by an elevator 23. Thus, a transplanter for moving the lifting device 23 up and down by switching the lifting / lowering switching unit 24a according to the average value of the height detection of the farm scenes by the left and right ground contact detectors 36 and 37 arranged on the left and right.

  Therefore, according to the first aspect of the present invention, the lifting / lowering device 24a is operated by switching the lifting / lowering switching unit 24a with the average value of the height detection of the farm scene by the left and right ground contact detection bodies 36 and 37 arranged on the left and right with respect to the aircraft traveling direction. 23 is moved up and down, so that even if there is a lump or the like in a farm scene, stable lifting control of the body can be performed and the seedling can be planted at an appropriate planting depth.

  The invention according to claim 2 is the transplanter according to claim 1, wherein the right and left tilt switching unit 24b is switched and operated by the difference in height detection of the farm scene by the left and right ground contact detectors 36 and 37 to operate the left and right tilt device 25. It was.

  Therefore, in addition to the operation of the invention described in claim 1, the invention described in claim 2 switches the left / right inclination switching unit 24b according to the difference in height detection of the farm scene by the left and right ground contact detectors 36, 37, thereby switching left and right. Since the tilting device 25 is operated, the left and right grounding detectors 36 and 37 detect the right and left tilt of the farm scene and are controlled so that the machine body is parallel to the farm scene. Can be transplanted.

  According to the third aspect of the present invention, the left / right tilt switching unit is operated by operating the manual body tilt adjustment lever 77 to the linkage mechanism that switches the left / right tilt switching unit 24b by the difference in the height detection of the farm scene by the left / right grounding detection bodies 36, 37. The transplanter according to claim 2, wherein a manual operation linkage unit S capable of switching 24b is provided.

Therefore, in the invention described in claim 3, in addition to the operation of the invention described in claim 2, the manual machine tilt adjustment lever 77 can be operated to manually operate the horizontal tilt posture of the machine.
According to the fourth aspect of the present invention, the left / right tilt switching unit 24b is switched by the weight-type horizontal detection sensor 80 that detects the left / right tilt of the fuselage by operating the operation levers 81 and 84 disposed near the grip 16a of the steering handle 16. The transplanter according to claim 2 or 3, wherein a horizontal control switching cooperation mechanism C to be operated is provided.

  Therefore, in addition to the operation of the invention described in claim 2 or 3, the invention described in claim 4 controls the horizontal control by operating the operating levers 81 and 84 disposed near the grip 16a of the steering handle 16. Since the switching cooperation mechanism C causes the left / right tilt switching unit 24b to be switched by a weight-type horizontal detection sensor 80 that detects the left / right tilt of the aircraft, the operator can operate the control handle 16 near the grip 16a. By operating the levers 81 and 84, the machine body can be freely switched between left and right tilt control and horizontal control parallel to the field scene.

  The invention according to claim 5 is a planting clutch operating lever 81 in which the operating lever operates to engage and disengage the planting clutch, and when the planting clutch operating lever 81 is operated to disengage the planting clutch, the horizontal control switching linkage mechanism C uses the weight horizontal The transplanter according to claim 4, wherein the right and left tilt switching valve 24 b is switched by detecting the body tilt of the detection sensor 80.

  Therefore, in the invention described in claim 5, in addition to the action of the invention described in claim 4, the planting clutch is operated by the planting clutch operating lever 81 when the vehicle is turning on the field or traveling on the road. Accordingly, the left and right tilt switching valve 24b is switched by the body tilt detection of the weight type horizontal detection sensor 80, and the body is controlled horizontally, so that an easy body turning operation and safe and easy road traveling can be performed.

  The invention according to claim 6 is a manual ascending operation lever 84 that causes the operation lever to switch the ascending / descending switching unit 24a to move the ascending / descending device 23 up and down. The transplanter according to claim 4, wherein the right and left tilt switching valve 24 b is switched by mechanism C by detecting the tilt of the body of the weight type horizontal detection sensor 80.

  Therefore, in addition to the action of the invention described in claim 4, the invention described in claim 6 is such that the manual lifting operation lever 84 is operated to lift the body when turning the body in the field or traveling on the road. The left and right tilt switching valve 24b is switched by the body tilt detection of the type horizontal detection sensor 80, and the body is controlled horizontally, so that an easy body turning operation and safe and easy road travel can be performed.

  Therefore, the transplanter of the present invention can perform stable lifting control of the machine body and appropriately solve the problems of the invention.

It is a left view of a tobacco transplanter. It is a top view of a tobacco transplanter. It is the bottom view which looked at the seedling supply part from the bottom. It is a side view of the connection mechanism part for controlling the height of the body of a tobacco transplanter. It is a top view of the connection mechanism part for controlling the height of the body of a tobacco transplanter. It is an expanded rear view of the part which switches the switching valve for right-and-left inclination. It is a hydraulic circuit diagram which moves a right-and-left rear wheel up and down. It is the perspective view seen from the left rear of the planting apparatus. It is the perspective view seen from the left front of the planting apparatus. It is the perspective view seen from the right rear of a planting apparatus. It is a side view of a planting apparatus. It is a top view of a planting apparatus. (A)-(d) It is a side view of the planting apparatus in each position during planting operation | movement. It is the graph which showed the up-and-down moving speed, the longitudinal moving speed, and the absolute speed of the planting tool during planting operation. (A)-(c) It is the graph which showed the static locus | trajectory and dynamic locus | trajectory of the planting tool tip in planting operation | movement. It is a side view of the hole making body vertical movement mechanism part when a planting tool exists in the vicinity of a top dead center. It is a side view of the hole making body vertical movement mechanism part when a planting tool exists in the bottom dead center vicinity. It is a principal part expanded side view explaining the effect | action of a hole making body part. It is a principal part enlarged plan view explaining the effect | action of a hole making body part. It is a rear view of a hole making body. It is a principal part expanded rear view of a hole making body. It is a principal part enlarged front view which shows the connection part of a hole making body and a hole making support frame. It is sectional drawing which shows the state by which the concave hole was formed in the cocoon and the seedling was planted. It is an enlarged side view of the part which switches and cooperates the switching valve for raising / lowering control which shows another example. It is a top view of the connection mechanism part for controlling the height of the body of the tobacco transplant machine which shows another example. It is a left view of the tobacco transplant machine which shows the example of a connection mechanism for controlling the height of another body. It is a principal part top view of the tobacco transplant machine which shows the example of a connection mechanism for controlling the height of another body. It is principal part operation | movement explanatory drawing of the connection mechanism for controlling the height of another body.

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 transplanter 10 for transplanting tobacco seedlings as an example of the transplanter of the present invention, and FIG. 2 is a plan view of the tobacco transplanter 10.

  As shown in FIG. 1, the tobacco transplanter 10 includes an engine 11 and a main transmission case 12 at the front, a pair of left and right front wheels 13 as a traveling wheel, a rear wheel 14 as a traveling device, and a planting device at the rear. 19, a seedling supply unit 31, a pressure-reducing wheel 15, and a steering handle 16. The side on which the engine 11 is mounted is the front of the tobacco transplanter, the side on which the steering handle 16 is mounted is the rear, the left side is the left side of the aircraft when viewed from the steering handle 16, and the right side is the right side of the aircraft. So-called.

  The cigarette transplanter 10 has a front wheel 13 and a rear wheel 14 that run between the ridges so that the traveling body straddles the ridge U in the field. Are to be planted.

  2, the left and right ends of the main transmission case 12 are respectively provided with left and right travel extension cases 40 that can rotate with respect to the main transmission case 12, and the respective end portions of the left and right travel extension cases 40 are provided. A traveling chain case 20 is attached to the vehicle. 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 (see FIG. 1). It is configured to be installed.

  Further, as shown in FIG. 2, a rear frame 21 extending in the left-right direction is fixedly provided at the rear end of the main transmission case 12, and the right end of the rear end surface of the rear frame 21 is front and rear at a position on the right side of the fuselage. A main frame 22 extending in the direction is 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.

  Further, a hydraulic lifting cylinder 23 as a lifting device is provided at the rear in the left-right direction at the rear of the main transmission case 12. The hydraulic lift cylinder 23 is fixedly provided on a hydraulic pressure switching valve portion 24 (see FIG. 1) attached to the main transmission case 12, and switches the oil path from the hydraulic pump Po attached to the main transmission case 12 to hydraulically switch. It operates by switching at the valve unit 24.

  Also, a horizontal rod 43 extending in the left-right direction is provided at the rear end of the cylinder rod 23a of the hydraulic lifting cylinder 23, and a left rear wheel lifting rod 44 and a right rear wheel lifting / lowering as rods are provided at the left and right ends of the horizontal rod 43, respectively. The rod 45 is connected, and 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, so that the horizontal rod 43 and the traveling extension are connected. The case 40 is connected to the case 40.

  Accordingly, the traveling chain case 20 is rotated around the left and right output shafts of the main transmission case 12 through 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. The traveling chain case 20 is configured so that the rear wheel 14 is moved up and down by the rotation of the traveling chain case 20 and the traveling body is moved up and down. The cylinder rod 23a, 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 may be a planting device, which will be described later in side view depending on the advancement position of the cylinder rod 23a. The structure is located below 19 lift link mechanisms 29, and the space is effectively used to make the body 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 brought into contact with a known cocoon U upper surface. Left and right grounding detection bodies 36 and 37 for detection are provided, and an elevation control switching valve 24a as an elevation switching unit provided in the hydraulic pressure switching valve unit 24 by detecting the upper surface of the flange U of the grounding detection bodies 36 and 37 is provided. The hydraulic lifting cylinder 23 is actuated by the hydraulic pressure from the hydraulic pump Po to control the raising and lowering of the left and right rear wheels 14, and the traveling machine body is controlled to a predetermined height with respect to the heel U so that the planting tool 28 The depth planted in U is made constant.

  Further, the left rear wheel lifting rod 44 is operated in the middle of the left rear wheel lifting rod 44 by a hydraulic pressure from a hydraulic pump Po via a left / right tilt switching valve 24b as a left / right tilt switching portion so that the left rear wheel lifting rod 44 extends and contracts. A left / right tilt hydraulic cylinder 25 is provided as a left / right tilt device, and 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 / contraction of the left / right tilt hydraulic cylinder 25. It is configured to control to a desired left-right inclined posture.

  That is, by detecting the difference in height between the left and right positions of the upper surface of the flange U of the ground contact detectors 36 and 37, the left and right tilt hydraulic cylinder 25 is moved via the left and right tilt switch valve 24b provided in the hydraulic switch valve portion 24. It is configured to control the ground inclination so that the traveling machine body is parallel to the upper surface of the heel U.

  The planting device 19 includes a planting transmission case 26 in which power from the main transmission case 12 is provided on the rear side of the main transmission case 12 in order to plant seedlings one by one in a field paddle, and the planting transmission case. It is transmitted and operated via a planting device drive case 27 attached to 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. As shown in FIG. 1, the tip of the planting tool 28 has a shape that descends on the front side and rises on the rear side as shown in FIG. It draws a locus 17 and operates repeatedly in the direction of the arrow in the figure.

  And 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 a rotation support shaft 22a provided at the main frame 22 so that the hole-forming body 110 can move up and down. ing.

  In addition, a hole support shaft 112 is connected to an intermediate portion of the hole support frame 111, and when the hole support shaft 112 moves up and down, the hole support frame 111 is moved up and down. The vertical movement of 110 is controlled.

  As shown in FIG. 2, the seedling supply section 31 is provided with a supply cup 33 on the supply turntable 32, which is operated by power from the planting transmission case 26 and is supplied by the operator by hand. Circular loops are arranged at predetermined intervals. The seedling supply unit 31 is supported by a seedling supply support frame F whose base is fixed to the planting transmission case 26.

FIG. 3 is a bottom view of the seedling supply unit 31 as viewed from below. At the bottom of each supply cup 33, one open / close lid 34 that is movable in the vertical direction is provided.
Further, as shown in FIG. 3, below each supply cup 33, the supply cup 33 comes to a predetermined position P that is a position above the planting tool 28 by the rotation of the supply turntable 32 in the direction of arrow A. In order to open the opening / closing lid 34 at the bottom of the supply cup 33 only when it is closed, a substantially C-shaped supply cup opening / closing guide 35 with a ring-shaped part cut out is fixed to the traveling machine body side. 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 transplanting machine 10 according to the present embodiment, an operator walking with the traveling of the aircraft grabs the seedlings on the seedling mounting table 30 one by one and rotates in the direction of arrow A according to the traveling of the aircraft. It puts in the supply cup 33 which is respectively.

  When the open / close lid 34 of the supply cup 33 is opened at the predetermined position P, the seedling in the supply cup 33 is supplied to the lower planting tool 28. When the planting tool 28 reaches the bottom dead center of the operation locus 17 shown in FIG. 1, the planting tool 28 enters the soil to a predetermined depth and opens to the left and right like a birdcage to drop the seedling held therein. And plant.

Next, the configuration and operation of the mechanism for controlling the height of the aircraft to be constant with respect to the field scene in the tobacco transplanter 10 of the present embodiment will be described.
FIG. 4 shows a side view of a linkage mechanism portion for controlling the height of the body of the tobacco transplanter 10, and FIG. 5 shows a plan view of the linkage mechanism portion. FIG. 6 shows an enlarged rear view of a portion for switching the left / right tilt switching valve 24b.

  The tobacco transplanter 10 includes left and right grounding detectors 36 and 37 that independently detect the height of the upper surface of the heel U. The left and right grounding detection bodies 36 and 37 are arranged side by side in the left and right direction of the machine body.

  A support shaft 52b is pivotally supported by a support arm 52a whose base is welded and fixed to the upper surface of the main frame 22. The left and right grounding detectors 36 and 37 can be moved vertically at the lower end grounding portions by the left and right support pins 54a provided at the front end portion of the left and right planting depth adjustment bar 54 whose base is fixed to the support shaft 52b. It is pivotally supported. In addition, left and right detection arms 36a and 37a provided integrally with the left and right grounding detection bodies 36 and 37, respectively, extend upward.

  Further, the hydraulic rod 55 has a rear end portion that cooperates with the left and right detection arms 36 a and 37 a of the left and right grounding detection bodies 36 and 37 via the balance 50, and a front end portion of the hydraulic rod 55 provided on the main frame 22. It is connected to a rear end portion of a rotation stay 56 that freely rotates about a shaft 58. The front end of the rotating stay 56 is connected to the lower end of the connecting rod 57, and the upper end of the connecting rod 57 is connected to the elevation switching arm 24a 'of the elevation control switching valve 24a. Therefore, according to the vertical movement of the connecting rod 57, the hydraulic lifting cylinder 23 is operated via the lifting control switching valve 24a provided in the hydraulic switching valve portion 24, and the left and right rear wheels 14 are lifted and lowered.

Here, the cooperative configuration of the balance 50 and the rear end portion of the hydraulic rod 55 and the balance 50 will be described in detail.
First, the detailed configuration of the balance 50 will be described. A rotation support boss 60 is welded and fixed to the front end portion of one planting depth adjustment bar 54 having a base portion fixed to the support shaft 52b, and a lower end portion of the L-shaped rotation arm 61 arranged in the left-right direction of the machine body is provided. The upper part extending through the L-shaped rotation arm 61 through the rotation support boss 60 is pivotally supported so as to rotate and swing in the longitudinal direction of the machine body. The lower end of the L-shaped rotation arm 61 arranged in the left-right direction of the machine body is also used as the support pin 54a.

  At the upper end of the L-shaped rotating arm 61, a rotating cylinder 63 is provided rotatably by welding and fixing bases of left and right casings 62L and 62R provided in the left-right direction of the machine body. The rotating cylinder 63 is provided so that a washer 64 is disposed on the upper and lower sides thereof so that the split pin 65 does not move in the vertical direction at the upper end portion of the L-shaped rotating arm 61.

  The left and right ends of the left and right casings 62L and 62R whose bases are fixed to the rotating cylinder 63 by welding are holes 36a ′ provided on the left and right detection arms 36a and 37a of the left and right grounding detection bodies 36 and 37, respectively. 37a 'is inserted and cooperated.

  A left and right spring receiving member 52c is provided on the upper surface of the support arm 52a fixed to the main frame 22, and a detection body biasing spring which is a tension spring between the left and right spring receiving member 52c and the left and right detection arms 36a and 37a. 68 is provided so that the lower end portions of the left and right ground detection bodies 36 and 37 are urged in the direction of grounding.

Next, the cooperative configuration of the rear end portion of the hydraulic rod 55 and the balance 50 will be described in detail.
A cylindrical boss body 66 is fitted on the rear end portion of the hydraulic rod 55, and a washer 67 for restricting rearward movement of the cylindrical boss body 66 is attached by a split pin 68. A washer 69 is attached to the front side of the body 66, and the cylindrical boss body 66 is attached via the washer 69 in a state of being biased toward the rear end side of the hydraulic rod 55 by the compression spring 70. . The base portion of the pin body 71 is welded and fixed to the right side of the cylindrical boss body 66.

  The reason why the longitudinal movement of the cylindrical boss body 66 is linked to the hydraulic rod 55 via the compression spring 70 is that the left and right ground contact detection bodies 36 and 37 are in contact with an obstacle and excessively move up. Therefore, even if the cylindrical boss body 66 moves excessively in the direction of the arrow B, the compression spring 70 is contracted to prevent the members from being damaged.

  Further, the base of the linkage arm 72 is welded and fixed to the lower part of the L-shaped rotation arm 61 of the balance 50 arranged in the left-right direction, and the tip of the linkage arm 72 is connected to the tip of the pin boss 71 of the cylindrical boss body 66. It is linked to.

  Therefore, the lower part of the upper part of the L-shaped rotating arm 61 of the balance 50 is pivoted back and forth, and the lower part moves the cylindrical boss body 66 in the arrow arrow direction via the linkage arm 72. The hydraulic rod 55 is moved in the arrow arrow direction via the compression spring 70, and the elevation switching arm 24 a ′ of the elevation control switching valve 24 a is switched via the rotating stay 56 and the connecting rod 57. Yes.

  At this time, when the grounding portions at the lower ends of the left and right grounding detection bodies 36 and 37 are moved upward, both the left and right detection arms 36a and 37a are pivoted forward, so that the upper portion of the L-shaped pivoting arm 61 of the balance 50 is swung forward. When the hydraulic rod 55 is actuated in the direction of arrow A through the cooperative arm 72 and the ground contact portions at the lower ends of the left and right ground contact detection bodies 36 and 37 are moved downward, both the left and right detection arms 36a and 37a are moved backward. Since it rotates, the upper part of the L-shaped rotating arm 61 of the balance 50 swings backward, and the hydraulic rod 55 is operated in the direction of the arrow B via the linkage arm 72 to move the lifting / lowering switching arm 24a of the lifting / lowering control switching valve 24a. Switch 'to activate. When the grounding portions at the lower ends of the left and right grounding detection bodies 36 and 37 move in the same or substantially the same direction in the opposite vertical direction (for example, the left grounding detection body 36 moves up by a distance of 3 cm, and the right grounding detection body 37 Since the left detection arm 36a is rotated forward and the right detection arm 37a is rotated backward, the L-shaped rotation arm 61 is merely rotated by the rotation cylinder 63 in a balance-like manner. Does not swing back and forth and does not actuate the hydraulic rod 55.

  On the other hand, one end of the outer wire 73a of the tilt control link wire 73 for switching the right and left tilt switching valve 24b is fixed to the distal end portion of the L-shaped support body 60a whose base is welded and fixed to the rotation support boss 60. The inner wire 73b on the same side is connected to the distal end side of the right casing 62R whose base is welded and fixed to the rotating cylinder 63 of the balance 50. The other end of the outer wire 73a of the tilt control link wire 73 is fixed to the distal end portion of the outer support arm 75 that is disposed near the left / right tilt switching valve 24b and is rotatable about the pivot shaft 74. The inner wire 73b on the side is connected to a tilt switching arm 76 that switches the left / right tilt switching valve 24b.

  Accordingly, when the ground contact portions at the lower ends of the left and right ground contact detection bodies 36 and 37 have different heights due to the left and right inclination of the farm scene, the rotating cylinder 63 in which the base portions of the left and right housings 62L and 62R are welded and fixed by the left and right detection arms 36a and 37a. Is rotated like a balance, the inner wire 73b of the tilt control cooperation wire 73 is moved in the direction of the arrow honey, and the tilt switching arm 76 is operated to switch the right and left tilt switching valve 24b. .

  The outer support arm 75 rotatably supported by the pivot shaft 74 is swung via a push-pull wire 78 by a manual machine body tilt adjustment lever 77 disposed in the vicinity of the grip 16a of the steering handle 16. It becomes the composition which is done. That is, when the manual body tilt adjustment lever 77 is set to the “neutral” position, the left / right tilt switching valve 24b is automatically activated when the ground contact portion at the lower end of the left / right ground detection bodies 36, 37 detects the left / right tilt of the farm scene as described above. 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 hydraulic cylinder 25 for tilting left and right to control the traveling body in a posture parallel to the upper surface of the heel U. Further, when the manual machine body tilt adjustment lever 77 is set to the “right tilt” position, the inner wire 73b of the tilt control linkage wire 73 is moved to the arrow direction by pulling the push-pull wire 78 and rotating the outer support arm 75 in the direction of arrow E. The left and right tilting switching valve 24b is switched via the tilt switching arm 76, the left and right tilting hydraulic cylinder 25 is contracted, and the left rear wheel 14 is moved downward to raise the traveling machine body to the right. Can be manually tilted to the state. On the other hand, when the manual machine body tilt adjustment lever 77 is set to the “left tilt” position, the push-pull wire 78 is pushed to rotate the outer support arm 75 in the direction of the arrow, so the inner wire 73b of the tilt control linkage wire 73 is moved to the arrow. The left / right tilt switching valve 24b is switched via the tilt switching arm 76, the left / right tilt hydraulic cylinder 25 is extended, and the left rear wheel 14 is moved upward to raise the traveling machine body to the left. Can be manually tilted to the state. The manual operation linkage portion S is configured by an outer support arm 75 rotatably supported by these pivot shafts 74 and a push-pull wire 78 operated by a manual machine body inclination adjusting lever 77.

  Further, as shown in FIG. 6, the upper part of the tilt switching arm 76 is fixed to the spool shaft 24b ′ of the left / right tilt switching valve 24b, and the left / right tilt switching valve 24b is switched. A tension spring 79 is provided between the lower part of the switching arm 76 and the fuselage, and when the operation force by the tilt control cooperation wire 73 does not work, the tension spring 79 pulls the tilt switching arm 76 vertically downward. The right and left tilt switching valve 24b is neutrally held by the force.

Further, an upper portion of the spool shaft 24b ′ of the left / right tilt switching valve 24b is pivotally supported so that a weight-type horizontal detection sensor 80 for detecting the left / right tilt of the airframe can freely swing.
At the upper end of the weight type horizontal detection sensor 80, the planting clutch operating lever 81 disposed in the vicinity of the grip 16a of the steering handle 16 is turned off (the power transmission to the planting transmission case 26 is cut off and planted). An engagement lock pin 83 that protrudes downward through the cooperative operation wire 82 in the attaching device 19, the seedling supply unit 31, and the operation of stopping the hole making body 110) is provided so as to be vertically movable. On the other hand, a V-shaped notch 76 a with which the engagement lock pin 83 is engaged is formed at the upper end of the inclination switching arm 76. The cooperation control wire 82, the engagement lock pin 83, and the notch 76a at the upper end of the inclination switching arm 76 constitute a horizontal control switching cooperation mechanism C.

  Therefore, when the operator performs the seedling transplanting operation by operating the planting clutch operating lever 81 with the planting clutch engaged, the ground contact portions at the lower ends of the left and right grounding detection bodies 36 and 37 are raised by the left and right inclination of the field scene as described above. Are different from each other, the rotating cylinder 63 in which the base portions of the left and right casings 62L and 62R are welded and fixed by the left and right detection arms 36a and 37a is rotated like a balance, and the inner wire 73b of the tilt control cooperation wire 73 is moved to the arrow h 2), the tilt switching arm 76 is operated, the left / right tilt switching valve 24b is switched, and the aircraft is tilt controlled so as to be parallel to the cocoon U, so that seedlings are transplanted appropriately to the cocoon U. can do.

  For example, when the operator operates the planting clutch operation lever 81 to disengage the clutch at the end position of the heel U, the engagement lock pin 83 is moved downward via the cooperative operation wire 82 as described above. The left / right tilt switching valve 24b is switched by detecting the body tilt of the weight type horizontal detection sensor 80.

  Therefore, after the operator operates the planting clutch operating lever 81 to disengage the planting clutch in order to turn the aircraft at the heel U end position, the manual lifting operation lever 84 (the planting clutch disposed near the grip 16a of the steering handle 16) is operated. When the airframe is operated so that the airframe is raised, the up / down switching arm 24a 'of the up / down control switching valve 24a is operated via the lift operation wire 85, and the up / down control switching valve is operated. 24a is switched, the hydraulic lifting cylinder 23 is extended, the left and right rear wheels 14 are lowered, and the airframe is raised. At this time, since the left and right tilt switching valve 24b is switched by the body tilt detection of the weight type horizontal detection sensor 80, the body is controlled horizontally and an easy body turning operation can be performed.

  Further, since the planting clutch operating lever 81 is operated to disengage the planting clutch even when traveling on the road, the left and right tilt switching valve 24b is switched by detecting the tilt of the fuselage horizontal detection sensor 80, and the fuselage is controlled horizontally. Moreover, it is possible to travel on the road easily.

  On the other hand, the base of the planting depth adjusting lever 53 is fixed to the support shaft 52b to which the base of the left and right planting depth adjusting bar 54 is fixed. Then, an operator grips the gripping portion 53a provided at the upper end portion of the planting depth adjusting lever 53 and rotates it back and forth, and attaches it to any one of a plurality of fixed guide grooves 53c formed in the lever fixing member 53b. By fixing the depth adjusting lever 53 and adjusting the angle of the left and right planting depth adjusting bar 54, the vertical position of the tip of the planting depth adjusting bar 54 can be changed. Since the vertical position of the left and right support pins 54a that are the movement center axis can be changed, the constant distance between the aircraft and the upper surface of the ridge U can be adjusted, and the planting depth of the tobacco seedling can be changed and adjusted. it can.

Next, the operation of the mechanism for controlling the height and inclination of the airframe configured as described above will be described.
First, in the case of seedling planting work, a case will be described in which the upper surface of the heel U approaches the machine body and the ground contact portions of the left and right ground contact detection bodies 36 and 37 are pushed up.

  In FIG. 4, when both the ground contact portions of the left and right grounding detection bodies 36 and 37 are pushed up, the left and right grounding detection bodies 36 and 37 rotate counterclockwise about the left and right support pins 54a.

  When the left and right ground contact detectors 36 and 37 rotate counterclockwise, the balance 50 operates the hydraulic rod 55 in the direction of the arrow A via the linkage arm 72 without operating the balance, and is connected to the other end of the hydraulic rod 55. The rotating stay 56 rotates clockwise about the rotating stay shaft 58. 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 control cylinder 23 is operated by switching the elevation control switching valve 24a of the hydraulic switching valve portion 24 connected to the other end of the coupling rod 57, 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.
On the contrary, when the upper surface of the heel U moves away from the aircraft, the ground contact portions of the left and right grounding detection bodies 36 and 37 are lowered along the upper surface of the heel U, and the left and right grounding detection bodies 36 and 37 rotate clockwise in FIG. It moves and operates in reverse to the above case where the upper surface of the bag U approaches the aircraft. That is, in this case, the connecting rod 57 moves downward, switches the lifting control switching valve 24a of the hydraulic switching valve portion 24 to operate the hydraulic lifting cylinder 23, and raises 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 when 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 seedling planting is too deep or too shallow. You can avoid it.

Next, the case where the upper surface of the bag U is inclined with respect to the aircraft will be described.
When the upper surface of the heel U is inclined with respect to the machine body, the height of the ground contact portions at the lower ends of the left and right ground contact detection bodies 36 and 37 differs depending on the left and right tilt of the farm scene. Then, the rotating cylinder 63 in which the bases of the left and right casings 62L and 62R are welded and fixed by the left and right detection arms 36a and 37a rotate in a balance shape so that the inner wire 73b of the inclination control cooperation wire 73 is moved in the direction of the arrow honey. And the tilt switching arm 76 is operated to switch the left / right tilt switching valve 24b.

  For example, when the saddle surface U on the right side of the aircraft is inclined higher than the left side with respect to the aircraft traveling direction, the ground contact portion at the lower end of the right ground detection body 37 moves upward and the right detection arm 37a rotates forward. To do. Then, the grounding portion at the lower end of the left grounding detection body 36 moves down, and the left detection arm 36a rotates backward. Then, the rotating cylinder 63 rotates like a balance so that the starboard body 62R is directed forward, the inner wire 73b of the cooperation wire 73 for tilt control is moved in the direction of arrow C, and the tilt switching arm 76 is operated. When the left / right tilting switching valve 24b is switched, the left / right tilting hydraulic cylinder 25 extends, and the left rear wheel 14 moves upward to tilt the traveling aircraft in the left downward direction. The tilt is controlled until.

  On the other hand, when the saddle surface U on the right side of the aircraft is inclined lower than the left side with respect to the traveling direction of the aircraft, the grounding portion at the lower end of the right grounding detection body 37 moves down and the right detection arm 37a rotates backward. Move. Then, the ground contact portion at the lower end of the left ground contact detection body 36 moves upward and the left detection arm 36a rotates forward. Then, the rotating cylinder 63 rotates like a balance so that the starboard body 62R is directed rearward, and the inner wire 73b of the inclination control cooperation wire 73 is moved in the direction of the arrow D to operate the inclination switching arm 76. When the left / right tilting switching valve 24b is switched, the left / right tilting hydraulic cylinder 25 extends, and the left rear wheel 14 moves upward to tilt the traveling aircraft in the right downward direction, so that the aircraft is parallel to the upper surface of the heel U. The tilt is controlled until.

  Therefore, since the left and right grounding detectors 36 and 37 detect the right and left inclination of the upper surface of the cocoon U and are controlled so that the aircraft is always parallel to the upper surface of the cocoon U, the seedlings should be transplanted into the heel U in an appropriate posture. Can do.

  Further, the left and right grounding detection bodies 36 and 37 are configured to be grounded to the left and right in front of the planting device 28 of the planting device 19 where the seedling is planted on the upper surface of the cocoon U. 37 does not disturb the field scene at the planting position, and seedlings are planted at the left and right center positions where the upper surface of the cocoon U is detected by the left and right ground contact detectors 36 and 37. Seedlings can be planted at various planting depths.

  In addition, although the above described the example of single row planting, in the case of the four row planting transplanter in which the four planting tools 28 are arranged side by side in the left-right direction of the aircraft, the left ground contact detection body 36 is seen from the rear of the aircraft. If the first line is planted at the left outer side position, the second and third lines are planted between the left and right ground detection bodies 36 and 37, and the fourth line is planted at the right outer side position of the right ground detection body 37, the left and right There is no situation where the ground contact detectors 36 and 37 damage the farming scene at the planting position, and the left and right ground contact detectors 36 and 37 detect the upper surface of the ridge U to perform vertical control and left and right tilt control. Since the seedlings are planted at the left and right outer positions and the left and right intermediate positions of the ground contact detectors 36 and 37, all four strips can be planted at an appropriate planting depth with respect to the ridge U.

Next, the detailed configuration and operation of the planting device 19 of the tobacco transplanter 10 shown in FIG. 1 will be described.
FIG. 8, FIG. 9 and FIG. 10 show a perspective view of the planting apparatus 19 according to the second embodiment, as seen from the left rear, a perspective view seen from the left front, and a perspective view seen from the right rear, respectively. FIG. 11 shows a side view of the planting apparatus 19 according to the second embodiment, and FIG. 12 shows a plan view.

  As shown in FIGS. 8 to 12, 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 left and right, and the planting tool 28. It is comprised from the raising / lowering link mechanism 29 provided in the planting drive transmission case 106 which raises / lowers.

The planting tool 28 is generally used to hold a seedling inside with a cup-shaped lower portion with a sharp tip closed, and open to the left and right at the lowest end of the planting locus 17 to plant the seedling in a cage. It is a configuration.
In the lift link mechanism 29 of the second embodiment, on the left side of the planting drive transmission case 106, the upper end is pivotally supported by the swing cam drive shaft 88 and the lower end is pivotable by the lower front shaft 91. The upper swing shaft 80 connected to the connection support plate 94 and the upper rear shaft 90 that is rotatable with respect to the planting drive transmission case 106 are fixed at the upper end, and the lower end is rotatable at the lower rear shaft 93. The front support arm 94 is connected to the front support arm 94 and the front left swing arm 81 is provided in parallel with the front and rear. 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 and drives the swing cam drive shaft 88 that protrudes to the left and the crank arm drive shaft 89 that protrudes to the right. .

The lifting link mechanism 29 corresponds to an example of the link mechanism of the present invention, and the planting drive transmission case 106 corresponds to an example of the transmission case of the present invention.
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 107 (see FIG. 13A) 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 second embodiment operates such that the tip of the planting device 19 draws the locus 17 when the tobacco transplanter 10 is stopped during the planting operation.
Next, operation | movement of the planting apparatus 19 is demonstrated.

  FIGS. 13A to 13D are side views of the planting device 19 at each position during the planting operation. FIG. 13A shows a side view at the top dead center, and FIG. 13C shows a side view at the bottom dead center. FIG. 13 (b) shows a side view when descending from the top dead center toward the bottom dead center, and FIG. 13 (d) is a diagram when rising from the bottom dead center toward the top dead center. The side view of is shown.

  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 a plurality of first swing links of the present invention. The direction in which these arms swing mainly in the front-rear direction is an example of the predetermined direction of the present invention. The swing drive cam 84 corresponds to an example of the first swing member of the present invention, and the swing cam drive shaft 88 corresponds to an example of the first output 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 up and down correspond to an example of a plurality of second swing links of the present invention. The direction in which these arms swing mainly in the vertical direction is an example of another predetermined direction of the present invention. The crank arm 85 corresponds to an example of the second swinging member of the present invention, and the crank arm drive shaft 89 corresponds to an example of the second output 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. Is operated with the lower end of the planting locus 17 being drawn, and the seedling received in the planting tool 28 can be planted on the ridge U in an appropriate posture.

  In the elevating link mechanism 29 according to the second embodiment, the left and right connecting rods 98 are connected to the connecting arm 86 at an intermediate portion between the lower left arm 83 and the lower right arm 97, so that the lower left arm 83 and the lower right arm 97 are connected to each other. When swinging up and down, the lower left arm 83 and the lower right arm 97 are less likely to be twisted than when the connecting arm 86 is connected to only one of the lower left arm 83 and the lower right arm 97.

In addition, since the left lower arm 83 and the right lower arm 97 swing together as a result of being connected by the left and right connecting rods 98, the strength is greater than when the left lower arm 83 and the right lower arm 97 are not connected.
Further, since the left rear swing arm 81 and the right rear swing arm 99 are disposed between the lower left arm 83 and the lower right arm 97, the lifting link mechanism 29 can be configured in a small size.

  Further, the left rear swing arm 81 and the right rear swing arm 99 fixed to the upper rear shaft 90 are provided on both the left and right sides of the planting drive transmission case 106, and are connected to the lower left arm 83 and the lower right arm 97, respectively. Since the lower left arm 83 and the lower right arm 97 are both fixed to the planting drive transmission case 106, the strength is high. Further, since the left rear swing arm 81 and the right rear swing arm 99 swing integrally, the twist of the lower left arm 83 and the lower right arm 97 can be suppressed.

  Further, since the planting drive transmission case 106 is arranged between the upper arm 82, the lower left arm 83, and the lower right arm 97 that support the planting tool 28 from the left and right, the driving force from the planting drive transmission case 106 is provided. Can be smoothly transmitted to the planting tool 28. Moreover, since it becomes the structure which fixes the upper arm 82, the lower left arm 83, and the lower right arm 97 from the position among them, the inclination of the raising / lowering link mechanism 29 can be suppressed. Further, since the planting drive transmission case 106 is disposed between the upper arm 82, the lower left arm 83, and the lower right arm 97, the lifting link mechanism 29 can be configured in a small size.

  Further, since the crank arm 85 is provided on the right side of the planting drive transmission case 106 and the swing drive cam 84 is provided on the left side of the planting drive transmission case 106, the crank arm 85 interferes with the swing drive cam 84. Therefore, the elevating link mechanism 29 can be downsized.

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 periphery of the opening / closing drive cam 100 contacts the opening / closing roller 102, the opening / closing drive cam 100 opens and closes according to the shape of the periphery of the opening / closing drive cam 100. 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 moving force acts. Along with the counterclockwise rotation of the counter arm 104, a force for raising the pin 105 acts. When an upward force is applied to the pin 105, the lower part 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.

  In the positions shown in FIGS. 13A and 13B, the opening / closing drive cam 100 is not in contact with the opening / closing roller 102, so that the planting tool 28 is located at the top dead center and the position descending from the top dead center. The state where the lower part of is closed is maintained.

  At the position of the bottom dead center in FIG. 13C, the opening / closing drive cam 100 starts to come into contact with the opening / closing roller 102, and at the position of FIG. 100 is kept in contact.

  Therefore, the planting tool 28 is maintained in a state where the lower part is closed until the planting tool 28 is lowered and reaches the bottom dead center, the lower part starts to open at the position of the bottom dead center, and the lower part is opened from the bottom dead center. It begins to rise.

  As described above, the counter arm 104 pivotally supported on the rotating upper shaft 95 to which the upper arm 82 is coupled is not connected to the opening / closing arm 101 via the coupling rod 103, regardless of the elevation position of the upper arm 82 and the lower left arm 83. The opening / closing arm 101 is operated in parallel, and the operation of the opening / closing arm 101 is controlled by the opening / closing driving cam 100 via the opening / closing roller 102. Therefore, the opening / closing timing and the opening / closing amount can be controlled with high accuracy by the opening / closing driving cam 100 having a simple shape.

FIG. 14 is a graph showing the vertical movement speed, the longitudinal movement speed, and the absolute speed obtained by combining the vertical movement speed and the longitudinal movement speed of the planting tool 28 according to the second embodiment during the planting operation.
In FIG. 14, the vertical movement speed of the planting tool 28 is indicated by a broken line, the vertical movement speed is indicated by a one-dot chain line, and the absolute speed obtained by combining them is indicated by a solid line.

  FIG. 14 shows that the absolute speed of the planting tool 28 is fast at the bottom dead center, but very slow at the top dead center. That is, the planting tool 28 moves relatively quickly near the bottom dead center, whereas it moves slowly at the top dead center and is close to a stop.

That is, in the vicinity of the top dead center where the seedling is supplied from the supply cup 33, the speed of the planting tool 28 is very slow, so that the seedling can be reliably supplied from the supply cup 33.
FIGS. 15A to 15C show a static locus when the tobacco transplanter 10 is stopped, and the tobacco transplanter 10 is traveling, in the planting tool 28 according to the second embodiment at the time of the planting operation. The movement trajectory in the case of In each case, the static locus is indicated by a one-point difference line, and the moving locus is indicated by a solid line.

  The movement trajectories shown in FIGS. 15A to 15C are obtained by changing the traveling speed of the tobacco transplanter 10 to change between the stocks, and each of the stocks is 40 cm, 50 cm, and 60 cm.

  15 (a) to 15 (c), the movement trajectory is 50 cm between strains, the lap of the trajectory at 75 mm from the bottom dead center is 4.9 mm, and 19.1 mm and 20 at 40 cm and 60 cm between strains. It was 2 mm, and it was confirmed that planting was possible without problems.

In addition, at the top dead center, the time during which the displacement in the X direction was 10 mm or less was 0.21 seconds, and it was confirmed that this was a stop time during which seedlings could be reliably supplied from the supply cup 33.
Therefore, since the moving speed at the top dead center of the planting tool 28 can be reduced (stop time is increased), it is possible to plant the plant with an appropriate movement trajectory between various strains only by changing the transmission ratio to the planting tool 28. it can.

Next, the detailed configuration and operation of the hole making body vertical movement mechanism of the tobacco transplanter 10 shown in FIG. 1 will be described.
As shown in FIG. 23, the hole making body 110 descends when the seedling is planted in the field by the planting tool 28, and a hollow hole H shallower than the depth of the planted seedling is formed around the planted seedling. Form on the ridge U.

  FIG. 16 shows a side view of the vertical movement mechanism portion when the planting tool 28 is near the top dead center, and FIG. 17 shows a cropping operation when the planting tool 28 is near the bottom dead center. The side view of the hole body vertical movement mechanism part is shown. 18 shows an enlarged side view of the hole making body 110 portion, FIG. 19 shows an enlarged plan view of the hole making body 110 portion, and FIG. 20 shows an enlarged perspective view of the hole making body 110 viewed from the back side. FIG. 21 shows an enlarged perspective view of the rotating part of the hole making body 110 viewed from the back side, and FIG. 22 shows an enlarged front view of the coupling part of the hole making body 110 and the hole making support frame 111. FIG. 23 is a cross-sectional view showing a state where tobacco seedlings are planted in the ridge U.

The hole making body 110 is provided at the tip of the hole making support frame 111, and the detailed configuration thereof will be described below.
That is, a hole-forming body rotation support pin 120 is fixed to the tip of the hole-making body support frame 111, and a flat plate-shaped left and right hole-making hole 121L having a sharp lower end when viewed from the front-rear direction. , 121R, and left and right mounting bosses 122L and 122R are externally fitted, and the left and right drilling holes 121L and 121R are configured to be rotatable around the hole-forming body rotating support pins 120. A collar 123 is mounted on the lower side and a lock pin 124 is inserted, so that the left and right drilling pieces 121L and 121R are prevented from falling off.

  Further, the left and right drilling pieces 121L and 121R are engaged with the upper ends of the left and right ends 125L and 125R of the torque spring 125 mounted on the upper part of the support pin 120 for rotating the drilling body, thereby FIG. 19 and FIG. As shown by a solid line in FIG. The left and right convex portions 126L and 126R, which are first engaging portions respectively formed on the front sides of the left and right mounting bosses 122L and 122R of the left and right drilling pieces 121L and 121R, are in contact with the distal end portion of the drilling support frame 111. By doing so, the left and right hole making pieces 121L and 121R are configured to be held in the state shown by the solid line in FIG. 19 facing the front of the aircraft.

  The left and right hole-making pieces 121L and 121R in the state of facing the front of the machine are subjected to the resistance of the soil in the field as they descend and come into contact with the kite U and gradually enter the field, thereby generating torque. -Against the urging force of the spring 125, it is gradually rotated in the direction of the arrow G to be in the state of an imaginary line facing the rear of the aircraft shown in FIG. The left and right hole-making pieces 121L and 121R form a shallow concave hole H on the upper surface of the ridge U, and a tobacco seedling is planted by the planting tool 28 in the shallow concave hole H. After that, as the left and right hole-making pieces 121L and 121R rise and gradually come out of the basket U, the resistance of the soil in the field becomes weaker, and the urging force of the torque spring 125 gradually turns in the direction indicated by the arrow H. Then, it returns to the state of the solid line facing the front of the aircraft shown in FIG.

  Note that left and right contact portions 127L and 127R, which are second engaging portions that contact each other, are provided on the rear side of the left and right mounting bosses 122L and 122R of the left and right work hole pieces 121L and 121R. The contact portions 127L and 127R are in contact with each other, and the rotation of the left and right hole making pieces 121L and 121R in the direction of the arrow is restricted, so that the left and right hole making pieces 121L and 121R resist the biasing force of the torque spring 125. Rotation is stopped in the state of the phantom line (in the shape of a square in plan view) that is rotated in the direction of the arrow G and faces the rear of the machine body shown in FIG.

  Accordingly, the left and right hole-making pieces 121L and 121R of the hole-making body 110 are gradually lowered from the state of facing the front of the solid body shown in FIG. 19 as they come into contact with the ridge U and enter the field. After the tobacco seedlings are planted by the planting tool 28, the imaginary line turns to the rear, and as it goes up from the inside of the kite U, it gradually returns to the state of the solid line facing the front of the aircraft. A relatively circular dent hole H can be formed around the tobacco seedling planted in U, and when water is poured into the dent hole H, water accumulates around the entire planted tobacco seedling. The growth after transplanting seedlings is improved.

  In addition, the hole making support frame 111 is provided with an angle changing mechanism 128 that can change and adjust the angle at which the hole making body 110 enters the field. That is, the hole-forming support frame 111 is divided into a base-side frame 111a and a tip-side frame 111b provided with a hole-making body 110, and the tip-side frame 111b is attached to the rear end of the base-side frame 111a. A bolt 130 is provided through the base side frame 111a in the left-right direction of the machine body, and an angle adjusting arc hole 131 (for angle adjustment) through which the bolt 130 is inserted. A circular arc hole centered on the rotation shaft 129 is provided, and the distal end side frame 111b is angle-adjusted with respect to the base side frame 111a with a nut 132 and then fixed.

  Accordingly, by changing and adjusting the angle at which the hole making body 110 enters the field by the angle changing mechanism 128, the hole making work according to the conditions of the field can be performed and the hole upper surface by the hole making body 110 is opened. The depth of the concave hole H can be adjusted, and the field adaptability of the transplanting work is improved.

  Further, the hole-forming support frame 111 having the hole-forming body 110 provided at the tip is disposed between the left and right grounding detection bodies 36 and 37, and the base is the main frame 22 so that the hole-forming body 110 can be moved up and down. Is pivotally attached to a pivotal support shaft 22a that is fixedly attached to the shaft. Therefore, the hole-forming body 110 fixed to the tip of the rod-shaped hole-forming support frame 111 is behind the left and right grounding detection bodies 36 and 37, and when viewed from the rear, the horizontal direction is both the grounding detection bodies 36 and 37. It is arranged at the overlapping position. Therefore, by arranging the hole making support frame 111 between the left and right grounding detection bodies 36 and 37, the space between the left and right grounding detection bodies 36 and 37 can be used effectively, and the airframe can be made compact. .

Further, as shown in FIG. 18, an irrigation device 140 for supplying water into a recessed hole H formed in the upper surface of the ridge U by the hole making body 110 is provided.
That is, the tank holding box 141 is welded and fixed to the upper surface of the main frame 22 on the rear side of the machine body with respect to the rotation support shaft 22a of the hole forming support frame 111 provided with the hole making body 110 at the tip. The resin water tank 142 is housed and held. The tank holding box 141 is provided with a notch 141a through which the following water supply valve 143 passes when the water tank 142 is placed on the tank holding box 141 from above.

A water supply valve 143 is provided on the lower side surface of the water tank 142, and one end of a water supply pipe 145 is attached to the water supply port 144 of the water supply valve 143.
The water supply pipe 145 enters the steel pipe hole support frame 111 at a position below the water supply valve 143, passes through the hole support frame 111 and exits from the hole support frame 111 near the hole body 110. The water outlet 145 a is fixed by a fixing member 146 at a position above the hole body 110.

  On the other hand, the base of a valve opening / closing operation arm 147 is fixed to the water supply valve 143, and the tip of the valve opening / closing operation arm 147 is connected to the hole-forming support frame 111 on the rear side of the machine body with respect to the pivot shaft 22a. They are connected by a rod 148.

  Therefore, as shown in FIGS. 16 and 18, when the hole making support frame 111 in which the hole making body 110 is located at a position away from the upper surface of the collar U moves upward, the valve opening / closing cooperation rod 148 and the valve opening / closing operation arm 147 are moved. The water supply valve 143 is in a closed state, and no water is discharged from the water outlet 145a of the water supply pipe 145. Then, as shown in FIG. 17, when the hole-forming support frame 111 in which the hole-making body 110 enters the flange U and forms the recessed hole H moves downward, the valve opening / closing cooperation rod 148 and the valve opening / closing operation are performed. With the water supply valve 143 opened through the arm 147, water comes out from the water outlet 145 a of the water supply pipe 145 and the water is stored in the hole H. Therefore, simultaneously with the transplanting operation of the tobacco seedling, a recessed hole H is formed by the hole making body 110 around the planted seedling, and water is accumulated in the hole H by the irrigation device 140, so that the seedling transplanting operation is efficiently performed. Since the water is collected around the seedlings, the seedlings are prevented from withering after the transplanting without water and the seedlings grow well.

  A base portion of the hole-forming support shaft 112 provided upward is fixed to an intermediate portion of the hole-forming support frame 111. The hole making support shaft 112 extends upward, passes through a through hole 113a formed in the upper surface of the end of the hole making arm 113, and further, the upper surface of the lowering stop member F1 fixed to the seedling supply support frame F It extends upward through the through hole F1a formed in the upper part. The hole forming support shaft 112 is provided with a convex portion 112a at an upper position penetrating the through hole 113a of the hole forming arm 113, and when the end of the hole forming arm 113 moves upward, The end portion of the arm 113 is in contact with the convex portion 112a, the drilling support shaft 112 is moved up, the drilling support frame 111 is also moved up, and the drilling body 110 is moved up.

  Further, the lower hole adjusting shaft 112 is provided with a lowering position adjusting member 112b at an upper position penetrating the through hole F1a of the lowering stop member F1. The position adjusting member 112b comes into contact with the upper surface of the lowering stop member F1, the lowest descending position of the hole making support shaft 112 is restricted, and the depth at which the hole making body 110 enters the flange U is restricted, so that a recessed hole is formed. The depth of H is determined.

  The lowered position adjusting member 112b is provided on the drilling support shaft 112 so that its position can be adjusted in the axial direction by a bolt 112d having a gripping portion 112c for rotation. Accordingly, the rotating grip 112c is turned to loosen the bolt 112d, the lowered position adjusting member 112b is adjusted in the vertical direction with respect to the bore support shaft 112, and the rotating grip 112c is rotated again to rotate the bolt 112d. When tightened, the vertical position of the descent position adjusting member 112b relative to the drilling support shaft 112 can be adjusted, the lowest descending position of the drilling support shaft 112 can be changed, and the depth at which the drilling body 110 enters the ridge U can be adjusted, The depth of the recessed hole H can be changed.

On the other hand, the other end of the drilling arm 113 is pivotally attached to the drilling arm support shaft 114 protruding from the side surface of the planting drive transmission case 106.
Further, a drilling body drive cam 115 that is fixed to the crank arm drive shaft 89 protruding from the planting drive transmission case 106 and rotates is provided. 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.

  A downward force is always applied to the hole forming support shaft 112 due to the weight of the hole forming body 110 and the hole forming support frame 111. The hole-forming support shaft 112 is arranged so as to be in contact with the vertical position of the hole-forming support shaft 112 according to the position where the hole-making arm 113 is in contact with the hole-making body drive cam 115.

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

  As the hole forming arm 113 rotates, the hole forming support shaft 112 engaged with the tip of the hole forming 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 support shaft 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.

  As shown in FIG. 16, 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, Away from.

  On the other hand, when the planting tool 28 is lowered and is in the planting position, the hole making body 110 is also lowered to a position below the field scene, as shown in FIG. 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 seedlings are planted in the field to a sufficient depth, and the seedlings planted by the hole making body 110 are planted. A shallow dent can be formed in the field.

The timing of the vertical movement of the hole making body 110 with respect to the raising / lowering operation of the planting tool 28 can be freely set by the peripheral shape of the hole making body driving cam 115.
Further, by lowering the hole making body 110 to a position for making a hole a little before the planting tool 28 reaches the position for planting in the field, a concave hole H is formed in the field from before the seedling is planted. be able to.

  With the hole making body vertical movement mechanism, a shallow concave hole can be formed around the seedling planted by the planting tool 28, and at the same time as the seedling planting, in the shallow concave hole H formed around the seedling. Water can be irrigated, and 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. Thus, errors in drive timing are less likely to occur in both, and good seedling planting and the formation of shallow concave holes H around the seedling can be performed, making it easy to establish and manage seedlings after transplanting. .

  In each embodiment, a seedling is 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 transplanter for planting a transplant object other than a seedling. For example, the present invention can also be applied as a transplanter such as a cocoon or bulb using a planting apparatus.

Next, the parking stand 170 will be described.
Reference numeral 171 denotes a stand support frame, which is formed by bending an iron plate body into a U-shape and welding and fixing the upper part thereof to the rear side of the main body of the main frame 22 so that the upper part of the parking stand 170 can be rotated and fixed. It has a configuration.

  More specifically, the stand support frame 171 is provided with a rotation support shaft 172 between its left and right side plates, and three engagement recesses 173a, 173b, 173c for fixing the position of the parking stand 170 on the outer periphery. Is provided.

  The parking stand 170 includes left and right leg portions 174L and 174R and a grounding portion 175 made of an iron pipe material that is welded and fixed to the lower ends of the left and right leg portions 174L and 174R and extends long in the right direction of the machine body.

  Then, the rotation support shaft 172 of the stand support frame 171 passes through the long holes formed in the upper portions of the left and right leg portions 174L and 174R of the parking stand 170, and each of the left and right leg portions 174L and 174R of the parking stand 170 is provided. A parking spring 170 is mounted on the stand support frame 171 by providing a tension spring between the connecting shaft 177 and the rotation support shaft 172 that are connected and fixed at the lower position of the long hole. The connecting shaft 177 extends to the outside in the left-right direction of the left and right leg portions 174L, 174R, and the left and right ends thereof are the lower engagement recess 173a, the middle engagement recess 173b and the upper engagement portion of the stand support frame 171. Each of the engaging recesses 173c is engaged.

  Therefore, when the operator grips the lower end portion (the grounding portion 175, etc.) of the parking stand 170 and pulls it away from the stand support frame 171 against the biasing force of the tension spring from the rear of the machine body, the parking stand 170 is The left and right ends of the connecting shaft 177 move away from the engaging recesses 173a, 173b, and 173c, and the parking stand 170 supports the rotation. It can rotate around the shaft 172.

  Therefore, after the left and right rear wheels 14 are moved to the lowest position to raise the airframe, the parking stand 170 is rotated around the rotation support shaft 172 so that the left and right ends of the connecting shaft 177 are in a downward orientation. When engaged with the joint recess 173a, the parking stand 170 assumes a parking posture. Then, when the left and right rear wheels 14 are gradually moved upward to lower the airframe, the grounding portion 175 of the parking stand 170 is grounded. Therefore, the aircraft is supported by the left and right front wheels 13 and the parking stand 170 and is parked. In the parking state, the aircraft can be stably stopped at a fixed position even on an inclined ground. In addition, since the aircraft is in a stable stopped state, the aircraft can be safely inspected and repaired. Furthermore, when the left and right rear wheels 14 are moved upward to a position far away from the ground, the operator can easily replace the left and right rear wheels 14.

  Similarly, when the parking stand 170 is rotated around the rotation support shaft 172 so that the left and right ends of the connecting shaft 177 are engaged with the middle engagement recess 173b in a posture facing the rear of the machine body, the parking stand 170 is provided. The grounding portion 175 is in a state in which an operator who steers the steering handle 16 at the rear of the aircraft and steers the aircraft can step on one foot. Therefore, when the left and right rear wheels 14 are moved to the lowest position at the end of the heel U to raise the airframe and turn the airframe, an operator holding the steering handle 16 behind the airframe will hold the grounding portion 175 of the parking stand 170. By stepping on one foot and applying weight, it is possible to easily push down the steering handle 16 and move the front part of the aircraft upward, so that the aircraft can be easily turned at the end of the heel U.

  Similarly, when the parking stand 170 is rotated around the rotation support shaft 172 so that the left and right ends of the connecting shaft 177 are engaged with the upper engagement recess 173c in a posture facing the upper side of the machine body, the parking stand 170 is provided. Is stored.

  FIG. 24 is an enlarged side view showing another example of a portion for switching the lifting control switching valve 24a by the left and right grounding detection bodies 36, 37, and the configuration of the rotating stay 56 that links the hydraulic rod 55 and the connecting rod 57 together. Has changed.

  That is, in order to rotatably support the rotation stay 56 on the rotation stay shaft 58, the rotation stay 56 is provided with a long hole 200 substantially parallel to the direction of the arrow arrow which is the operation direction of the hydraulic rod 55. The long hole 200 is fitted in the moving stay shaft 58, and the winding spring 202 is supported on the spring support shaft 201 provided in the rotating stay 56, and one end 202 a of the winding spring 202 is connected to the hydraulic rod 55 of the long hole 200. It is engaged with the end face on the far side, and the other end 202 b of the winding spring 202 is provided in contact with the rotating stay shaft 58.

  Further, the contact between the connecting portion of the rotating stay 56 and the hydraulic rod 55 and the rotating stay shaft 58 is positioned below the rotating stay 56 when the rotating stay 56 is largely rotated clockwise. The shaft 203 is provided in the airframe.

  Therefore, during normal transplantation work, the rotation stay 56 is rotatable with the rotation stay shaft 58 in contact with the end surface of the long hole 200 near the hydraulic rod 55 by the biasing force of the winding spring 202. Supported by Therefore, as in the above embodiment, when the upper surface of the heel U approaches the aircraft, both the ground contact portions of the left and right ground contact detection bodies 36 and 37 are pushed up. Then, the left and right ground detection bodies 36 and 37 rotate counterclockwise about the left and right support pins 54a in the left and right direction in FIG.

  When the left and right ground contact detectors 36 and 37 rotate counterclockwise, the balance 50 operates the hydraulic rod 55 in the direction of the arrow A via the linkage arm 72 without operating the balance, and is connected to the other end of the hydraulic rod 55. The rotating stay 56 rotates clockwise about the rotating stay shaft 58. 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 control cylinder 23 is operated by switching the elevation control switching valve 24a of the hydraulic switching valve portion 24 connected to the other end of the coupling rod 57, 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.
Conversely, when the upper surface of the heel U moves away from the aircraft, the ground contact portions of the left and right grounding detection bodies 36 and 37 are lowered along the upper surface of the heel U, and the left and right grounding detection bodies 36 and 37 rotate clockwise in FIG. It moves and operates in reverse to the above case where the upper surface of the bag U approaches the aircraft. That is, in this case, the hydraulic rod 55 is operated in the direction of the arrow B, and the rotation stay 56 connected to the other end of the hydraulic rod 55 rotates counterclockwise about the rotation stay shaft 58. When the rotating stay 56 rotates counterclockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves downward, and switches the lifting control switching valve 24a of the hydraulic switching valve portion 24 to increase or decrease the hydraulic pressure. The cylinder 23 is operated 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 when 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 seedling planting is too deep or too shallow. You can avoid it.

  Further, during the transplanting operation, when the aircraft is moved backward while the left and right grounding detection bodies 36 and 37 are in contact with the upper surface of the heel U, the rear ends of the left and right grounding detection bodies 36 and 37 pierce the heel U and the left and right grounding grounding. There may be a situation in which the detection bodies 36 and 37 are largely rotated in the arrow direction. Then, in order to operate the hydraulic rod 55 in the direction of the arrow B, as described above, the switching valve 24a for lifting control is switched to operate the hydraulic lifting cylinder 23 to raise the left and right rear wheels 14, and the fuselage is lowered. Increasingly, the rear ends of the left and right ground contact detectors 36 and 37 are deeply pierced into the heel U, and the linkage mechanism to the left and right ground contact detectors 36 and 37 and the lifting control switching valve 24a is damaged due to the backward movement of the aircraft. It becomes.

  Therefore, in this embodiment, the rotation stay 56 is rotatable with the rotation stay shaft 58 in contact with the end surface of the long hole 200 on the side close to the hydraulic rod 55 by the urging force of the winding spring 202. Therefore, when the aircraft is moved backward as described above, the rear ends of the left and right ground contact detectors 36 and 37 pierce the heel U, and the left and right ground contact detectors 36 and 37 are largely rotated in the direction of the arrow. If the hydraulic rod 55 is greatly operated in the direction indicated by the arrow B, the rotation stay 56 moves against the rotation stay shaft 58 along the long hole 200 in the direction indicated by the arrow against the urging force of the winding spring 202. Thus, it is possible to avoid a situation in which the airframe is lowered by switching the lift control switching valve 24a and operating the hydraulic lift cylinder 23 to raise the left and right rear wheels 14 as described above. Further, the rotating stay 56 moves against the urging force of the winding spring 202 in the direction of the arrow along the long hole 200, whereby the contact piece 56a of the rotating stay 56 shown in FIG. The rotating stay 56 rotates in the clockwise direction with the contact shaft 203 as a rotation fulcrum to move the connecting rod 57 upward, and the lifting control switching valve 24a of the hydraulic switching valve section 24 is moved. By switching, the hydraulic lifting cylinder 23 is operated, the left and right rear wheels 14 are lowered, and the body is raised. Therefore, the state in which the rear ends of the left and right contact detection bodies 36 and 37 are stuck into the ridge U can be eliminated, and the aircraft can be moved backward without damaging each part.

  FIG. 25 is a plan view of a connecting mechanism portion for controlling the height of the body of a tobacco transplanter according to another example, which is different from the above-described embodiment in that the balance 50 is moved up and down by the left and right contact detection bodies 36 and 37. The linkage mechanism for linking the operation to the left / right tilt switching valve 24b is different, and the other configurations are the same as those in the above embodiment.

  That is, the front end of the left support rod 250L having a base portion welded and fixed to the front end portion of the planting depth adjustment bar 54 that pivotally supports the left ground contact detector 36 so that the lower end ground contact portion can move up and down, and the right ground contact detector 37. A supporting horizontal rod 251 is attached to the distal end of the right support rod 250R whose base is welded and fixed to the front end of the planting depth adjustment bar 54, whose lower end grounding portion is pivotally supported so as to move up and down. It is provided by welding. The supporting horizontal rods 251 are arranged in the left-right direction of the body perpendicular to the traveling direction of the body, and the left and right housings 62L, 62R whose bases are welded and fixed to the rotating cylinder 63 of the balance 50 are left-right grounded. The grounding portions at the lower ends of the detection bodies 36 and 37 are parallel to the state when the balance is not operating at the same height.

  On the other hand, one end of each of the left and right outer wires 252La and 252Ra of the left and right tilt control link wires 252L and 252R for switching the right and left tilt switching valve 24b is fixed to the left and right sides of the support horizontal bar 251 respectively. The wires 252Lb and 252Rb are connected to the distal ends of the left and right casings 62L and 62R, respectively, whose bases are fixed to the rotating cylinder 63 of the balance 50 by welding. The other end of the outer wire 252La of the left tilt control link wire 252L is fixed near the right side of the right / left tilt switching valve 24b, and the other end inner wire 252Lb is a tilt switching arm that switches the left / right tilt switching valve 24b. The right side of 76 is connected. In addition, the other end of the outer wire 252Ra of the right inclination control cooperation wire 252R is fixed to the distal end portion of the outer support arm 75 that is disposed near the left side of the right and left inclination switching valve 24b and is rotatable by the pivot shaft 74. The inner wire 252Rb on the other end side is connected to the left side portion of the tilt switching arm 76 that switches the left / right tilt switching valve 24b.

  Therefore, when the height of the ground contact portions at the lower ends of the left and right ground contact detection bodies 36 and 37 is different depending on the right and left inclination of the farm scene, the rotating cylinder 63 in which the base portions of the left and right housings 62L and 62R are welded and fixed by the left and right detection arms 36a and 37a. Is rotated like a balance, and the left and right inner wires 252Lb and 252Rb of the right and left tilt control cooperation wires 252L and 252R are moved in the direction of the arrow honey to operate the tilt switching arm 76 and the right and left tilt switching valve 24b It is configured to be switched.

  Accordingly, when the balance 50 at the lower end of the left and right ground contact detectors 36 and 37 has a different height depending on the right and left inclination of the field scene and the balance 50 is rotated, the rotation is switched by the cooperation wires 252L and 252R for left and right inclination control. Since the left / right tilt switching valve 24b is switched by operating the arm 76, it is possible to switch the right / left tilt switching valve 24b accurately, and the right / left tilt control of the airframe can be performed properly, so Seedlings can be planted at various planting depths.

  In the above-described embodiment, by detecting the upper surface of the heel U of the left and right contact detection bodies 36 and 37, the hydraulic lifting cylinder 23 is operated to control the lifting and lowering of the aircraft, and the left and right tilting hydraulic cylinder 25 is operated to tilt the aircraft left and right. Although the example which performs control was shown, based on FIGS. 26-28, the tobacco transplanter equipped with the connection mechanism for controlling the height of another body is demonstrated.

  That is, the left and right hydraulic lift cylinders 300L and 300R are disposed above the front wheel support frame 41 on both the left and right sides of the engine 11 disposed at the front of the body, and the front of the engine base 11a on which the engine 11 is mounted is disposed at the front end of the body. A swinging rod 303 supported by a swinging support shaft 302 so as to be able to swing back and forth is disposed at the front end of a swinging support arm 301 whose base is fixed by welding. The left and right ends of the swing rod 303 arranged in the left and right direction of the machine body are connected to the front ends of the left and right hydraulic lifting cylinders 300L and 300R, and the left and right hydraulic lifting cylinders are connected to the upper arm 40a attached to the traveling extension case 40. The rear ends of 300L and 300R are connected to each other. Left and right compression springs 304L and 304R are provided on both the left and right sides of the swing support shaft 302 between the swing rod 303 and the front portion of the engine base 11a.

  Accordingly, the left and right traveling chain cases 20 are rotated about the left and right output shafts of the main transmission case 12 via the upper arm 40a by the expansion and contraction of the left and right hydraulic lifting cylinders 300L and 300R. The left and right rear wheels 14 are moved up and down to raise and lower and tilt the traveling machine body. In addition, when the rocking rod 303 swings back and forth on the rocking support shaft 302, when the farm field (gutter groove) and the road surface where the left and right rear wheels 14 touch the ground are slightly different on the left and right sides of the body, The left and right rear wheels 14 move up and down in a balance-like manner following the field (groove groove) and road surface so that the machine body is not tilted by the rocking rod 303 swinging back and forth.

  Further, a hydraulic pressure switching valve portion 24 is provided at the rear upper part of the main transmission case 12, and left and right switching valves 305 </ b> L and 305 </ b> R are provided on the rear side wall portion of the hydraulic pressure switching valve portion 24. The upper part of the weight type horizontal detection sensor 80 for detecting the horizontal inclination of the airframe is pivotally supported on the side wall so as to freely swing.

  And the planting tool 28 of the planting device 19 is in contact with the upper surface of the cocoon U and the height of the upper surface of the cocoon U at the front left and right positions of the planting plant 19 at the position below the center of the machine body. Left and right grounding detection bodies 36 and 37 for detection are provided, and the left and right grounding detection bodies 36 and 37 detect the upper surface of the heel U so that the left and right switching valves 305L and 305R are switched, and the right and left are detected by the hydraulic pressure from the hydraulic pump Po. The hydraulic elevating cylinders 300L and 300R are operated to control the raising and lowering of the left and right rear wheels 14 to control the traveling machine body to a predetermined height with respect to the heel U and to control the inclination of the ground so that the traveling body is parallel to the upper surface of the heel U. Thus, the depth at which the planting tool 28 plants the seedling on the ridge U is made constant.

Here, the configuration in which the left and right switching valves 305L and 305R are switched when the left and right grounding detection bodies 36 and 37 respectively detect the upper surface of the heel U will be described in detail.
As in the above example, the left and right ground detection bodies 36 and 37 are arranged in the left and right direction of the airframe in a state where the lower end portions of the left and right ground detection bodies 36 and 37 are respectively urged by the detection body biasing spring 68 in the direction of grounding. Has been placed. The left and right ground contact detectors 36 and 37 are provided with left and right support pins 54a provided at the front end of a left and right planting depth adjustment bar 54 having a base fixed to a support shaft 52b to which a base of a planting depth adjustment lever 53 is fixed. The lower end grounding portion is pivotally supported so as to be vertically movable. In addition, left and right detection arms 36a and 37a provided integrally with the left and right grounding detection bodies 36 and 37, respectively, extend upward.

  The left and right detection arms 36a and 37a of the left and right ground contact detection bodies 36 and 37 are provided on left and right rotation stays 56L and 56R that freely rotate about the left and right rotation stay shafts 58L and 58R provided on the main frame 22, respectively. The left and right connecting rods 57L and 57R are connected to the rear end portion. The front ends of the left and right rotating stays 56L and 56R are connected to the lower ends of the left and right connecting rods 57L and 57R, respectively, and the upper ends of the left and right connecting rods 57L and 57R are the left and right switching valves 305L and 305R, respectively. It is connected to 305L 'and 305R'. Therefore, when the left and right contact detection bodies 36 and 37 detect the upper surface of the heel U and move up and down, the left and right switching valves 305L and 305R are switched by the cooperation mechanism, and the left and right hydraulic lifting cylinders 300L and 300R expand and contract, respectively. The left and right rear wheels 14 are moved up and down separately.

  Further, when the manual raising operation lever 84 is operated so that the airframe is raised, the left and right switching valves 305L and 305R 'of the left and right switching valves 305L and 305R are operated via the lift operation wire 306, and the left and right switching valves 305L and 305R are operated. Are switched, the left and right hydraulic lifting cylinders 300L and 300R are extended, the left and right rear wheels 14 are lowered, and the body is raised.

  On the other hand, the weight type horizontal detection sensor 80 is interposed in the middle of the lift operation wire 306 for operating the left valve switching arm 305L 'of the left switching valve 305L. That is, the outer wire 306a of the lift operation wire 306 for operating the left valve switching arm 305L 'of the left switching valve 305L is fixed to the weight type horizontal detection sensor 80 that swings left and right by the left and right inclination of the body.

  Accordingly, when the airframe is turned at the end position of the heel U in the field or when traveling on the road, the manual lifting operation lever 84 is operated so as to raise the airframe, as described above, the left and right switching valves 305L, The left and right switching valves 305L and 305R are switched by operating the left and right valve switching arms 305L 'and 305R' of the 305R, and the left and right hydraulic lifting cylinders 300L and 300R are extended to operate the left and right rear wheels 14 to be lowered and the body to be raised. When the ground contact surfaces of the left and right rear wheels 14 are different in height on the left and right, the aircraft tends to tilt left and right. However, in this embodiment, the weight type horizontal detection sensor 80 is interposed in the middle of the lift operation wire 306 for operating the left valve switching arm 305L ′ of the left switching valve 305L as described above. The outer wire 306a of the lift operation wire 306 that operates the left valve switching arm 305L ′ by operating the 80 body tilt detection is operated, and the left switching valve 305L is operated to control the expansion and contraction of the left hydraulic lifting cylinder 300L. It is controlled to become. Therefore, since the airframe is kept horizontal when the airframe is raised, an easy airframe turning operation can be performed, and traveling on the road can be performed safely and easily.

  The transplanting machine according to the present invention can be applied to a transplanting machine for planting various kinds of transplanted objects such as various seedlings such as vegetable seedlings and flower seedlings and seedlings such as potatoes and bulbs such as raccoon in addition to tobacco seedlings. High availability on.

14 Left and right travel device (rear wheel)
16 Steering handle 16a Grasping part 23 Lifting device (hydraulic lifting cylinder)
24a Elevation switching part (elevation control switching valve)
24b Left / right tilt switching part (left / right tilt switching valve)
25 Left / right tilting device (hydraulic cylinder for tilting left / right)
28 Planting tool 36 Left ground detection body 37 Right ground detection body 77 Manual body tilt adjustment lever 80 Weight type horizontal detection sensor 81 Operation lever (planting clutch operation lever)
84 Operation lever (Manual lifting operation lever)
C Horizontal control switching linkage mechanism S Manual operation linkage section

Claims (6)

  In a transplanting machine provided with a planting tool (28) for planting a transplanted object on a machine equipped with a left and right traveling apparatus (14) that moves up and down by a lifting device (23), it is arranged on the left and right with respect to the aircraft traveling direction. A transplanter, wherein the lifting / lowering device (23) is moved up and down by switching the lifting / lowering switching unit (24a) with the average value of the height detection of the farm scene by the left and right ground contact detection bodies (36, 37).   The left-right tilting device (25) is operated by switching the left-right tilt switching unit (24b) according to the difference in height detection of the farm scene by the left-right contact detection body (36, 37). Transplanter.   The left and right tilt switching unit (24b) is operated by operating the manual machine tilt adjustment lever (77) to the linkage mechanism that switches the left and right tilt switching unit (24b) according to the difference in height detection of the farm scene by the left and right ground contact detection bodies (36, 37). The transplanter according to claim 2, further comprising a manual operation linkage unit (S) capable of switching between the two.   A weight-type horizontal detection sensor (80) for detecting the horizontal tilt of the aircraft by the horizontal tilt switching unit (24b) by operating the operation levers (81, 84) disposed near the grip (16a) of the steering handle (16). The transplanter according to claim 2 or 3, further comprising a horizontal control switching linkage mechanism (C) that performs switching operation according to the above.   A planting clutch operating lever (81) for operating the planting clutch to engage and disengage the planting clutch. When the planting clutch operating lever (81) is operated to disengage the planting clutch, the horizontal control switching linkage mechanism (C) uses a weight type horizontal detection sensor. The transplanter according to claim 4, wherein the left / right tilt switching valve (24b) is switched by detecting the tilt of the vehicle body (80).   When the operating lever is a manual ascending operation lever (84) that switches the ascending / descending switching unit (24a) to move the ascending / descending device (23) up and down, and the manual ascending operation lever (84) is operated to raise the body, horizontal control switching cooperation The transplanter according to claim 4, wherein the right and left tilt switching valve (24b) is switched by the mechanism (C) by detecting the body tilt of the weight type horizontal detection sensor (80).

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