JP2013070623A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem wherein since the periphery of seedlings planted by the conventional transplanter are finely leveled, watering done simultaneously with or after planting seedlings causes flowing away from the periphery of the seedlings not to perform effective watering, further even if fertilizer and chemicals are applied to the periphery of seedlings, similarly they are dispersed away from the periphery of the seedlings not to perform effective application of fertilizer and chemicals, so favorable watering is required so that water suitably remains in the periphery of seedlings, cultivation and management of transplanted seedlings are facilitated to improve work efficiency.SOLUTION: This transplanter includes: a traveling propellant 14 driven by a motor 11; and a planting tool 28 driven to elevate by a driving mechanism in a planting transmission case 26, wherein the transplanter further includes a hole making device 142 which is operated to elevate in the periphery of seedlings planted in a field by the planting tool 28 to thereby form a hole H like a recess.

Description

  The present invention relates to a transplanting method 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, and a transplanting machine for realizing the transplanting method.

  Conventionally, a transplanter is configured by a planting device that includes a planting tool and a lifting link mechanism that lifts and lowers the planting tool. It rushes to a predetermined depth and opens in the left-right direction or the front-rear direction to plant seedlings in the field, and suppresses the surrounding area of the seedlings with a pressure-reducing body so as to plant the seedlings.

  Therefore, the surroundings of the seedlings planted by the transplanter are in a state of being smoothed and covered with soil.

JP 2011-67135 A

  Since the surroundings of the seedlings planted with a conventional transplanter are cleanly leveled and covered with soil, irrigation is carried out at the same time as planting of the seedlings or after planting, but the irrigated water is far from the surroundings of the seedlings. The irrigation is not effective. Moreover, even if fertilization and a medicine are performed around the seedling, similarly, effective fertilization and a medicine cannot be performed by scattering far away from the seedling.

  Therefore, in the present invention, when irrigation is performed on a planted seedling (including when it is rained and irrigated), water remains appropriately around the seedling, and irrigation to a good seedling can be performed, so that transplanting can be performed. The problem is that the cultivation management of later seedlings is easy and work efficiency is improved. Similarly, when fertilizer or medicine is applied to seedlings, the problem is that fertilizers and medicines remain appropriately around the seedlings so that good fertilization and medicine can be performed.

In order to solve the above problems, the following technical measures were taken.
That is, the invention according to claim 1 is a transplanting machine equipped with a traveling propulsion body 14 driven by the prime mover 11 and a planting tool 28 driven up and down by a driving mechanism in the planting transmission case 26. The transplanting machine provided with the hole making device 142 that the tool 28 is moved up and down around the seedling to be planted in the field to form the concave hole H is provided.

  Therefore, the invention described in claim 1 is carried out by the traveling propulsion body 14 driven by the prime mover 11 and is planted in the field by the planting tool 28 that is driven up and down by the drive mechanism in the planting transmission case 26. Is planted. The hole making device 142 is moved up and down around the seedling planted by the planting tool 28 in the field to form a concave hole H. Therefore, when irrigating in the concave hole H formed around the seedling at the time of planting or after planting, water remains appropriately around the seedling, and good seedling can be irrigated. Seedling cultivation management becomes easy and work efficiency is good. In addition, fertilizer can be fertilized or a medicine can be applied in the concave hole H formed around the seedling, so that the cultivation management of the planted seedling can be easily performed.

  The invention which concerns on Claim 2 comprises the hole making body 110 which forms the shallow hollow hole H in the field around the seedling provided in the hole making apparatus 142 by the left and right hole making pieces 121L and 121R, and the right and left hole making The pieces 121L and 121R are provided so as to be pivotable back and forth around the connecting portion, and the left and right hole-making pieces 121L and 121R are rotated forward at a position distant from the field and moved downward to enter the field. The transplanter according to claim 1, wherein the transplanter is configured to turn to the rear of the machine body as it goes on.

  Therefore, in the invention according to claim 2, in addition to the action of the invention according to claim 1, since the left and right drilling pieces 121L and 121R are rotated to the front at the initial stage of entering the field, the soil on the surface of the field is brought closer. As it is leveled as it collects and enters the field, it gradually turns to the rear of the aircraft, so the hole H is formed while removing the collected soil left and right outside, and the dent When the water is poured into the concave hole H, water accumulates around the planted tobacco seedling, and after the seedling transplantation, Growth is good.

  The invention according to claim 3 is the transplanter according to claim 2, wherein the transplanter is configured such that the left and right hole-making pieces 121L and 121R are moved upward to gradually move forward from the field as they are gradually removed from the field. .

  Therefore, in the invention described in claim 3, in addition to the action of the invention described in claim 2, the left and right drilling pieces 121L and 121R are moved deeply into the field to form holes and then moved upward to As it gradually comes out from the position, it will turn to the front of the fuselage, so the end of the recessed hole H can form a relatively round hole, and the recessed hole H is relatively It becomes a round hole, and water collects around the tobacco seedling planted when water is added, and the growth after seedling transplantation becomes good.

  The invention according to claim 4 is provided with a spring 125 for biasing the left and right hole-making pieces 121L and 121R to a posture rotated forward, and the left and right hole-making pieces 121L and 121R are rotated forward and rotated backward. The transplanter according to claim 2 or claim 3, wherein the first engagement portions 126L and 126R and the second engagement portions 127L and 127R that respectively hold the postures are provided.

  Therefore, in the invention described in claim 4, in addition to the action of the invention described in claim 2 or claim 3, the spring 125 for biasing the left and right hole-making pieces 121L and 121R to a posture rotated forward is provided. Since the first engagement portions 126L and 126R and the second engagement portions 127L and 127R that respectively hold the left and right hole-making holes 121L and 121R in the posture rotated forward and the posture rotated backward are provided. The left and right drilling holes 121L and 121R are rotated forward at a position away from the field in the configuration, and are rotated to the rear as the vehicle moves down and enters the field. Then, as it gradually leaves the field, it becomes a posture rotated forward.

  The invention according to claim 5 is the transplanter according to any one of claims 1 to 4, further comprising an angle changing mechanism 128 capable of changing and adjusting the angle at which the hole making body 110 enters the field. did.

  Therefore, in the invention described in claim 5, in addition to the action of the invention described in any one of claims 1 to 4, the angle at which the hole making body 110 enters the field by the angle changing mechanism 128. By adjusting and adjusting the depth of the hole, it is possible to adjust the depth of the concave hole H formed on the upper surface of the ridge U by the hole-making body 110. Field adaptability is improved.

  The invention which concerns on Claim 6 provided the irrigation apparatus 140 which supplies water in the recessed hole H drilled in the agricultural field upper surface by the hole-making body 110, It is any one of Claim 1-5 A transplanter was used.

  Therefore, in the invention described in claim 6, in addition to the operation of the invention described in any one of claims 1 to 5, the hollow hole H formed in the upper surface of the field by the hole making body 110 is provided. Since the irrigation device 140 for supplying water is provided, 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 work is performed. Since it is carried out efficiently and water is collected around the seedling, there is no water after transplanting and the seedling is prevented from withering and the seedling grows well.

  Therefore, in the transplanter of the present invention, when water is poured into the concave hole H formed around the seedling at the time of seedling planting or after planting, water is appropriately collected around the seedling, and watering to a good seedling is performed. Therefore, the cultivation management of the seedling after transplanting becomes easy and the working efficiency is good, and the problems of the invention can be solved appropriately.

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 enlarged plan view of a balance. (A) Side view of hydraulic rod, (b) Plan view of hydraulic rod. It is an expanded back sectional view of a balance. It is a side view of the connection mechanism part which shows the other example for controlling the height of the body of a tobacco transplanter. It is a top view of the connection mechanism part which shows the other example for controlling the height of the body of a tobacco transplanter. It is a principal part expanded rear view of the connection mechanism part which shows the other example for controlling the height of the body of a tobacco transplanter. 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 a principal part expanded side view which shows the other example explaining the effect | action of a hole making body part. It is a principal part enlarged plan view which shows the other example explaining the effect | action of a hole making body part. It is a principal part enlarged front view which shows the other example explaining the effect | action of a hole making body part. It is a principal part expanded side view which shows the further another example explaining the effect | action of a hole making body part. It is a principal part enlarged plan view which shows the further another example explaining the effect | action of a hole making body part. It is a principal part expanded side view explaining the effect | action of a parking stand. It is a principal part enlarged rear view of a parking stand.

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 and rear wheels 14 as traveling wheels, and a planting device 19 and seedling supply at the rear. A portion 31, a pressure reducing wheel 15 and a steering handle 16 are provided. 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.

  In addition, a hydraulic lifting cylinder 23 is provided at the rear portion of the main transmission case 12 in the center in the left-right direction. The hydraulic lift cylinder 23 is fixedly provided to a hydraulic pressure switching valve portion 24 (see FIG. 1) attached to the main transmission case 12, and an oil passage from a hydraulic pump attached to the main transmission case 12 is connected to the hydraulic pressure switching valve. It is operated by switching at the unit 24.

  Also, a horizontal rod 43 extending left and right is provided at the rear end of the cylinder rod of the hydraulic lift cylinder 23, and a left rear wheel lift rod 44 and a right rear wheel lift rod, which are rods, are provided at the left and right ends of the horizontal rod 43, respectively. 45, 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 case are connected. 40 is connected.

  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. Note that the cylinder rod of the hydraulic lift cylinder 23, the horizontal rod 43, the left rear wheel lift rod 44, and the right rear wheel lift rod 45 have a lift link mechanism 29, which will be described later in side view, depending on the advancement position of the cylinder rod. The structure is located below and the space is effectively used to make the aircraft 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 contact position detectors 36 and 37 for detection are provided, and a hydraulic lift cylinder is provided via a lift control switching valve provided in the hydraulic switch valve portion 24 by detecting 位置 U of the ground position detectors 36 and 37. 23 is operated to raise and lower the left and right rear wheels 14 so that the traveling machine body is controlled to a predetermined height with respect to the heel U so that the planting tool 28 can plant the seedlings in the heel U at a constant depth. .

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

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

  The planting device 19 according to the first embodiment 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. It is transmitted and operated through a planting device drive case 27 attached to the planting transmission case 26.

  The planting device 19 includes a cup-shaped planting tool 28 with a sharp tip and an elevating link mechanism 29 that operates to raise and lower the planting tool 28. 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.

  Moreover, when planting a seedling with the planting tool 28, the hole making body 110 which forms a shallow concave hole in the field around the planted seedling is provided. A hole-forming support frame 111 that supports the hole-forming body 110 at one end is rotatably attached to the main frame 22 so that the hole-forming body 110 can move up and down.

  In addition, a hole 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.

FIG. 3 is a bottom view of the seedling supply unit 31 as viewed from below.
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.

As shown in FIG. 3, one open / close lid 34 that is movable in the vertical direction is provided at the bottom of each supply cup 33.
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 first embodiment, an operator walking along 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 carrying out each.

  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 a mechanism for controlling the height of the aircraft to be constant with respect to the field scene in the tobacco transplanter 10 according to the first 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. 6 shows an enlarged plan view of the balance 50, FIG. 7A shows a side view of the hydraulic rod 55, FIG. 7B shows a plan view of the hydraulic rod 55, and FIG. An enlarged sectional view is shown.

  The tobacco transplanter 10 includes left and right contact position detectors 36 and 37 that independently detect the height of the upper surface of the heel U. The left and right contact position detectors 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 position 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. Is pivotally supported. Note that left and right detection arms 36a and 37a, which are integrally provided respectively, extend upward at the front portions of the left and right ground contact position detectors 36 and 37.

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

Here, a detailed configuration of the balance 50 provided at the rear end portion of the hydraulic rod 55 will be described.
As shown in FIG. 8, the upper flat plate 61U and the lower flat plate 61D are welded and fixed in parallel to the upper and lower sides of the rotary boss 60 that is rotatably fitted to the rear end portion of the hydraulic rod 55. The left and right balance rods 63L and 63R made of round bars are inserted into the left and right space portions 62L and 62R of the rotating boss 60 formed by 61U and the lower flat plate 61D with a sharpened tip. As shown in FIG. 5, the other ends of the left and right balance rods 63L and 63R are connected to the left and right detection arms 36a and 37a of the left and right ground contact position detectors 36 and 37, respectively.

  A washer 64 for restricting rearward movement of the rotating boss 60 is attached to the rear end portion of the hydraulic rod 55 with a split pin 65, and a cylindrical collar 66 is attached to the front side of the rotating boss 60. The rotating boss 60 is mounted in a state of being biased toward the rear end side of the hydraulic rod 55 by the compression spring 67 through the collar 66.

  Further, a spring receiving member 52c is provided on the upper surface of the support arm 52a fixed to the main frame 22, and a detecting body biasing spring 68 as a tension spring is provided between the spring receiving member 52c and the rear end portion of the hydraulic rod 55. The left and right grounding position detectors 36 and 37 are configured to be biased in the direction of grounding.

  Accordingly, when the ground contact portions at the lower ends of the left and right ground contact position detectors 36 and 37 are moved up and down due to unevenness in the farm scene, a lump of soil, etc., the respective vertical operations of the left and right ground contact position detectors 36 and 37 are performed via the balance 50. Thus, the hydraulic rod 55 is configured to operate in the arrow arrow direction. That is, when the grounding portions at the lower ends of the left and right grounding position detectors 36 and 37 are both moved upward, the hydraulic rod 55 is operated in the direction of arrow A, and the grounding portions at the lower ends of the left and right grounding position detectors 36 and 37 are both moved downward. When the hydraulic rod 55 is actuated in the direction of the arrow B, and the ground contact portions at the lower ends of the left and right ground contact position detectors 36 and 37 move in opposite directions to each other (for example, the left ground contact position detector 36 moves upward by a distance L). When the right grounding position detector 37 is moved downward by the distance L), the balance 50 only rotates around the axis of the hydraulic rod 55, and the hydraulic rod 55 is not operated.

  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 adjustment lever 53 and adjusting the angle of the left and right planting depth adjustment bar 54, the vertical position of the tip of the planting depth adjustment bar 54 can be changed. Since the vertical position of the left and right support pins 54a, which is the rotation center axis, can be changed, the constant distance between the aircraft and the upper surface of the basket U can be adjusted, and the planting depth of the tobacco seedling can be changed and adjusted. Can do.

Next, the operation of the mechanism for controlling the height of the airframe thus configured to be constant will be described.
First, a case will be described in which the upper surface of the heel U approaches the body and the grounding portions of the left and right grounding position detection bodies 36 and 37 are pushed up.

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

  When the left and right contact position detectors 36 and 37 rotate counterclockwise, the balance 50 operates the hydraulic rod 55 in the direction of the arrow A via the compression spring 67 without operating the balance, and is connected to the other end of the hydraulic rod 55. The rotation stay 56 thus rotated rotates about the rotation stay shaft 58 in the clockwise direction. When the rotating stay 56 rotates clockwise, the connecting rod 57 connected to the other end of the rotating stay 56 moves upward.

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

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

  By controlling in this way, even 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 operation when only one of the left and right ground contact position detectors 36 and 37 detects a change in the distance from the machine body to the top surface of the kite U due to a rough field and a clump of soil will be described.
Here, as an example, a case will be described in which the position of the upper surface of the kite U with respect to the aircraft on the left ground contact position detector 36 side does not change, and there is a clot on the kite U on the right ground contact position detector 37 side.

  If there is a mass on the right side of the ridge U with which the right ground contact position detection body 37 is in contact, the ground contact portion of the right ground contact position detection body 37 is pushed up along the soil mass, and only the right ground contact position detection body 37 has a right support pin. It rotates counterclockwise around 54a.

  When the right grounding position detection body 37 rotates counterclockwise, a force is applied to move the balance 50 in the direction of the arrow B through the right detection arm 37a of the right grounding position detection body 37 and the right balance rod 63R. At this time, since the left ground contact position detector 36 is not rotated, no force is applied to move the balance 50 in the direction of the arrow B via the left detection arm 36a of the left ground contact detector 36 and the left balance rod 63L. Since the rotating boss 60 of the balance 50 is located at the center position of the balance 50, the moving distance for moving the balance 50 in the direction of the arrow A through the right detection arm 37a of the right ground position detector 37 and the right balance rod 63R is as follows. When the balance 50 is operated, the distance is reduced to half.

  Therefore, the distance by which the grounding portion of the right grounding position detector 37 moves up in the earth and moves the hydraulic rod 55 in the direction of the arrow A is halved by the balance operation of the balance 50. The amount that the connected hydraulic switching valve unit 24 switches the elevation control switching valve is halved. If the elevation control switching valve cannot be switched beyond the neutral range of the elevation control switching valve, the hydraulic elevation cylinder Since 23 does not operate and the left and right rear wheels 14 do not descend, the body position is not changed with respect to the upper surface of the heel U. Even if the switching valve for lifting control is switched beyond the neutral range of the switching valve for lifting control, the amount of switching operation of the switching valve for lifting control is halved. The amount by which the rear wheel 14 descends is very small and does not significantly affect the seedling planting depth.

  As described above, the linkage mechanism that controls the height of the airframe of the present embodiment at a constant corresponds to the amount of change obtained by averaging the amount of change in the vertical movement detected by each of the left and right contact position detectors 36 and 37. The aircraft is controlled to move up and down. Since the field scene is detected by averaging the detections by the two left and right ground contact position detectors 36 and 37 arranged on the left and right, even if there is a clot on the ridge U, stable elevation control can be performed without causing the aircraft to fluctuate up and down. It can be performed, and the raising / lowering control can be optimized, so that a good seedling transplanting operation can be performed.

In addition, since the balance 50 is mounted on the hydraulic rod 55 itself that switches the lift control switching valve, the entire connecting mechanism is small and simple.
FIG. 9 shows a side view of a connecting mechanism portion that is a second embodiment for controlling the height of the body of the tobacco transplanter 10, and FIG. 10 shows a plan view of the connecting mechanism portion of the second embodiment. Moreover, the expanded sectional view of the balance 50 of 2nd Example is shown in FIG.

  In the second embodiment, as in the previous embodiment, the rear end portion of the hydraulic rod 55 is linked to the left and right detection arms 36a and 37a of the left and right ground contact position detectors 36 and 37 via the balance 50, and the front end portion thereof. Is connected to a rear end portion of a rotation stay 56 that freely rotates around a rotation stay shaft 58 provided in the main frame 22. The front end portion of the rotating stay 56 is connected to the lower end portion of the connecting rod 57, and the upper end portion of the connecting rod 57 is connected to the hydraulic pressure switching valve portion 24. Therefore, according to the vertical movement of the connecting rod 57, the hydraulic lifting cylinder 23 is operated via the lifting control switching valve provided in the hydraulic switching valve portion 24, and the left and right rear wheels 14 are lifted and lowered.

  Then, the upper end of the pivot pin 70 directed downward is welded and fixed to the lower side of the sliding boss 60a that is rotatably fitted to the rear end portion of the hydraulic rod 55, and the pivot pin 70 in the left-right direction of the body. A balance boss 71, which is welded and fixed to the center portion of the extending balance rod 63, is externally fitted, and a washer 72 is attached so as to sandwich the upper and lower ends of the balance boss 71, and is secured by a split pin 73. The balance rod 63 is welded and fixed to the rear side of the balance boss 71 (the rear side of the balance pin 70 which is the pivot shaft of the balance boss 71).

The left and right ends of the balance rod 63 are connected to the left and right detection arms 36a and 37a of the left and right grounding position detectors 36 and 37, respectively.
A rear washer 64a for restricting rearward movement of the sliding boss 60a is attached to the rear end of the hydraulic rod 55 with a split pin 65, and a front washer 64b is also attached to the front side of the sliding boss 60a. The sliding boss 60a is mounted via the washer 64b while being urged toward the rear end side of the hydraulic rod 55 by the compression spring 67.

  Accordingly, the balance rod 63 connected to the left and right detection arms 36a, 37a of the left and right ground contact position detectors 36, 37 is located on the rear side of the balance boss 71 (from the pivot pin 70 which is the pivot shaft of the balance boss 71). Since it is provided on the rear side of the machine body, when any one of the left and right contact position detectors 36, 37 is pushed up by a convex portion of the field, a lump, etc., the sliding boss is operated by a balance operation. The amount by which 60a is moved in the direction of arrow b is reduced, and even if there is a clump on the ridge U, stable lifting control can be performed without the aircraft moving up and down largely, and the lifting control can be further optimized and good seedlings Can be transplanted.

Next, the detailed configuration and operation of the planting device 19 of the tobacco transplanter 10 shown in FIG. 1 will be described.
12, 13, and 14 show a perspective view of the planting device 19 according to the second embodiment as viewed from the left rear, a perspective view from the left front, and a perspective view from the right rear, respectively. FIG. 15 shows a side view of the planting apparatus 19 of the second embodiment, and FIG. 16 shows a plan view.

  As shown in FIGS. 12 to 16, the planting device 19 receives a seedling from an opening formed in the upper portion, 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. 17A) 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. 17A to 17D show side views of the planting device 19 at each position during the planting operation. FIG. 17A shows a side view at the top dead center, and FIG. 17C shows a side view at the bottom dead center. FIG. 17 (b) shows a side view when descending from the top dead center toward the bottom dead center, and FIG. 17 (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. 17A and 17B, the opening / closing drive cam 100 is not in contact with the opening / closing roller 102. Therefore, 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. 17C, 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. 18 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. 18, 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.

  From FIG. 18, it can be seen 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.
19 (a) to 19 (c) show the static locus when the tobacco transplanter 10 is stopped, and the tobacco transplanter 10 is traveling, in the planting tool 28 of the second embodiment during the planting operation. The movement trajectory in the case of In each case, the static trajectory is indicated by a one-point difference line, and the moving trajectory is indicated by a solid line.

  The movement trajectories shown in FIGS. 19A to 19C are obtained by changing the traveling speed of the tobacco transplanter 10 to change the stocks, and the cases where the stocks are 40 cm, 50 cm, and 60 cm, respectively.

  19 (a) to 19 (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. 27, 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. 20 shows a side view of the vertical movement mechanism portion when the planting tool 28 is near the top dead center, and FIG. 21 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. 22 shows an enlarged side view of the hole making body 110 portion, FIG. 23 shows an enlarged plan view of the hole making body 110 portion, and FIG. 24 shows an enlarged perspective view of the hole making body 110 viewed from the back side. FIG. 25 shows an enlarged perspective view of the rotating part of the hole making body 110 as seen from the back side, and FIG. 26 shows an enlarged front view of the coupling part between the hole making body 110 and the hole making support frame 111. FIG. 27 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.

  In addition, the left and right hole making 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 hole making body rotating support pin 120, respectively, as shown in FIGS. As shown by the solid line, it is biased to face the front of the aircraft. 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.

  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 C and is in the state of an imaginary line facing the rear of the machine body 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. Thereafter, as the left and right hole-making pieces 121L and 121R are lifted and gradually come out of the basket U, the soil resistance of the field is weakened, and the urging force of the torque spring 125 gradually rotates in the two arrow directions. 23 to return 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 C is restricted, and the left and right hole making pieces 121L and 121R resist the urging force of the torque spring 125, The rotation is stopped in the state of an imaginary line (in the shape of a dogleg in a plan view) that rotates in the direction of the arrow C 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. 23 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 portion is disposed between the left and right ground contact position detection bodies 36 and 37, and the base portion is the main frame so that the hole-forming body 110 can be moved up and down. It is rotatably attached to a rotation support shaft 22 a that is fixedly attached to 22. Therefore, the hole-forming body 110 fixed to the tip of the rod-shaped hole-forming support frame 111 is located behind the left and right grounding position detectors 36 and 37 and viewed from the rear in the left-right direction with respect to the grounding position detectors 36 and 37. It is arranged at a position that overlaps both. Therefore, by arranging the hole-forming support frame 111 between the left and right contact position detectors 36 and 37, the space between the left and right contact position detectors 36 and 37 can be used effectively, and the aircraft can be made compact. Can be planned.

Furthermore, as shown in FIG. 22, an irrigation device 140 for supplying water into a recessed hole H formed on 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. 20 and 22, 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 flange 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. 21, 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, but the lower part of the arm portion of the hole-forming arm 113 is located on the peripheral edge of the hole-forming body driving cam 115. 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. 20, 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, as shown in FIG. 21, the hole making body 110 is also lowered to a position below the farm scene. At this time, by setting the lower surface of the hole making body 110 to a position slightly above the tip position of the planting tool 28, the 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.

FIG. 28 is a principal enlarged side view showing another example of the operation of the hole making body part, FIG. 29 is a principal enlarged plan view, and FIG. 30 is a principal enlarged front view thereof.
This embodiment differs from the previous embodiment in that the configuration of the hole making body 110 is different from that in the previous embodiment, and that a scraper 150 that removes mud adhering to the front portion of the hole making body 110 is provided.

  That is, the hole making body 110 has a shape in which left and right side walls 151L and 151R are provided in parallel, and the front portions of the left and right side walls 151L and 151R are integrally connected by a triangular excavation body 151F in a plan view with a sharp tip. The front upper end of the excavating body 151F is welded and fixed to the tip of the hole making support frame 111 (the tip of the tip side frame 111b of the hole making support frame 111).

  And the water outlet 145a of the water supply pipe 145 of the said Example is arrange | positioned at the excavation body 151F upper part of the hole making body 110, and the irrigation apparatus 140 is in the recessed hole H of the upper surface of the ridge U which the hole making body 110 formed. It becomes the composition where water is collected by.

  Moreover, it is set as the structure by which a tobacco seedling is planted with the planting tool 28 by the planting tool 28 in the hollow hole H center part which the hole making body 110 forms in the upper surface of the ridge U, The excavation body 151F of the hole making body 110, and left-right side wall 151L, Since the tobacco seedling is planted by the planting tool 28 in the space surrounded by 151R, the planting tool 28 can plant the seedling in a field scene that is neatly leveled by the hole making body 110. A good seedling transplant can be done.

  Further, a planting tool scraper 152 made of a rubber plate is provided on the inner wall of the upper end portion of the hole making body 110, and the hole making body 110 forms a concave hole on the upper surface of the ridge U. The planting tool 28 enters the space surrounded by the excavating body 151F and the left and right side walls 151L and 151R of the hole making body 110 from above, and comes out after planting seedlings, but when planted, the planting tool 28 is planted by the planting tool scraper 152. Since mud adhering to the outer wall of the tool 28 is removed, the planting tool 28 can always enter the field scene properly and plant the seedling properly on the field with a beautiful planting mark.

  A scraper 150 that removes mud adhering to the front portion of the hole making body 110 is fixed to a scraper support frame 153 having a base fixed to the main frame 22 by welding and fixing the upper end of a scraper body 154 made of an L-shaped elastic plate in a side view of the body. Configured.

  The scraper body 154 has its lower end bent in an L-shape toward the rear, and its tip 154a is in contact with the entire lateral width of the front surface of the excavating body 151F of the hole making body 110. That is, when the hole making body 110 is moved to the uppermost position, the tip 154a contacts the lower end of the front surface of the excavating body 151F, and when the hole making body 110 is moved to the lowermost position, the tip 154a is moved to the excavated body. It contacts the lower end position of the front end side frame 111b on the front of 151F. Therefore, when the hole making body 110 moves to the bottom and moves upward and retracts from the state in which the recessed hole H is formed on the upper surface of the ridge U, the tip portion 154a of the scraper body 154 is positioned at the lower end of the front surface of the excavating body 151F. To the lower end position of the front end side frame 111b while moving in contact with the front surface of the excavation body 151F, the mud adhering to the front surface of the excavation body 151F is removed. Therefore, mud soil adheres to the front surface of the excavated body 151F and hardens, the resistance when the hole making body 110 enters the field increases, and a situation in which the hole cannot be properly formed can be avoided. Work can be done.

FIG. 31 is an essential part enlarged side view showing still another example for explaining the operation of the hole making part, and FIG. 32 is an enlarged plan view of the principal part.
In this embodiment, the configuration of the scraper for removing mud adhering to the front portion of the hole making body 110 is different from that of the above example.

  That is, the scraper that removes the mud adhering to the front part of the hole making body 110 is an elastic material scraper 160 such as rubber. A base portion of the scraper support 161 is fixed to the main frame 22, and a thin cylindrical (bar-shaped) rubber scraper 162 is attached to the lower end portion thereof in the left-right direction of the machine body.

  The rubber scraper 162 is longer than the left and right width of the excavating body 151F of the hole making body 110, and is configured to contact the entire left and right lateral width of the front surface of the excavating body 151F. In other words, the rubber scraper 162 is disposed at a position that contacts the lower end of the front surface of the excavating body 151F when the hole making body 110 is moved to the uppermost position. The rubber scraper 162 moves downward with respect to the front surface of the excavation body 151F from the lower end of the front surface of the excavation body 151F while being in contact with the front surface of the excavation body 151F. It moves and removes the mud adhering to the front surface of the excavated body 151F. Therefore, mud soil adheres to the front surface of the excavated body 151F and hardens, the resistance when the hole making body 110 enters the field increases, and a situation in which the hole cannot be properly formed can be avoided. Work can be done.

Finally, the parking stand 170 will be described. FIG. 33 is an enlarged side view of the main part for explaining the operation of the parking stand, and FIG. 34 is an enlarged rear view of the main part of the parking stand.
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 the left and right side plates 171L and 171R, and three engagement recesses 173a for fixing the position of the parking stand 170 on the outer periphery. 173b and 173c are 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 176 formed in the upper portions of the left and right leg portions 174L and 174R of the parking stand 170, and the left and right leg portions 174L and 174R of the parking stand 170 are formed. A tension spring 178 is provided between a connection shaft 177 and a rotation support shaft 172 that connect and fix the lower positions of the long holes 176, and the parking stand 170 is mounted on the stand support frame 171. The connecting shaft 177 extends to the outside in the left and right direction of the left and right leg portions 174L and 174R, and the left and right end portions 177L and 177R of the left and right leg portions 174L and 174R are engaged with the bottom of the stand support frame 171. The recess 173a, the middle engagement recess 173b, and the upper engagement recess 173c are engaged with each other.

  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 urging force of the tension spring 178 from the rear of the machine body, the parking stand 170 is The stand support frame 171 moves by the length of the long hole 176 through which the rotation support shaft 172 passes, and the left and right end portions 177L and 177R of the left and right leg portions 174L and 174R are disengaged from the engagement recesses 173a, 173b and 173c. The parking stand 170 can be rotated around the rotation support shaft 172.

  Therefore, after moving the left and right rear wheels 14 to the lowest position and raising the airframe, the parking stand 170 is rotated around the rotation support shaft 172 so that the left and right ends of the left and right legs 174L and 174R are oriented downward. When the 177L and 177R are engaged with the lower engaging recess 173a, the parking stand 170 assumes the 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, the parking stand 170 is rotated around the rotation support shaft 172 so that the left and right end portions 177L and 177R of the left and right leg portions 174L and 174R are engaged with the middle engagement recess portion 173b. Then, the grounding portion 175 of the parking stand 170 is in a state where an operator who steers the steering handle 16 behind 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, the parking stand 170 is rotated about the rotation support shaft 172 so that the left and right end portions 177L and 177R of the left and right leg portions 174L and 174R are engaged with the upper engagement recess 173b. As a result, the parking stand 170 is stored.

  On the other hand, various control levers such as a main clutch lever and a vertical movement control lever of the aircraft are arranged at the left and right central portions of the steering handle 16, but the aircraft is stopped in the levers (left and right rear wheels 14). Only the planting device 19 and the seedling supply unit 31 are driven (only the clutch that transmits the driving force to the planting device 19 and the seedling supply unit 31 is turned on). There is a planting part drive lever 180. The planting unit drive lever 180 does not drive the planting device 19 and the seedling supply unit 31 at the cutting position operated below the aircraft (disengage the clutch that transmits the driving force to the planting device 19 and the seedling supply unit 31). Then, only the planting device 19 and the seedling supply unit 31 are driven at the entrance position operated above the machine body (only the clutch that transmits the driving force to the planting device 19 and the seedling supply unit 31 is engaged).

  When the planting part drive lever 180 is operated from the cutting position operated below the machine body to the entry position operated above the machine body, only the planting device 19 and the seedling supply unit 31 can be driven with the machine body stopped, By driving the seedling supply unit 31 and rotating the supply cup 33 in the direction of the rotating arrow A before the transplanting operation, the operator supplies the seedling to each supply cup 33 and supplies the seedling supplied supply cup 33. When the planter reaches the upper position of the planting tool 28, the planting part drive lever 180 is set to the cut position operated downward of the machine body. Then, since the seedling is supplied to the supply cup 33 located above the planting tool 28 when transplanted to the ridge U, the seedling transplanting operation can be performed immediately and the workability and the work efficiency are good. In addition, the planting device 19 and the seedling supply unit 31 can be driven and the inspection work of each unit can be performed in a state where the machine body is raised and stopped.

  However, if the operator mistakenly operates the planting unit drive lever 180 from the cut position where the planting unit is operated downward to the entrance position where the unit is operated above when the aircraft is stopped, the planting device 19 and the seedling supply unit 31 are unexpectedly driven. Because it is done, it is dangerous. Therefore, in this embodiment, the planting portion drive lever 180 is normally in the cut position operated downward of the machine body, but at that time, the parking stand 170 is rotated around the rotation support shaft 172 to be stored upward. In this state, the grounding portion 175 of the parking stand 170 is positioned above the operation gripping portion 180a of the planting portion drive lever 180, and the operator cannot operate the planting portion drive lever 180 from the cut position to the on position. . Therefore, it is safe and possible to prevent the operator from operating the planting part drive lever 180 from the cut position where the planting unit drive lever 180 is operated downward to the entry position where the operator operates above the body when the aircraft is stopped.

  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.

11 Motor 14 Traveling propulsion body (rear wheel)
26 Planting transmission case 28 Planting tool 110 Drilling body 121L, 121R Left and right drilling piece 125 Spring (torque spring)
126L, 126R first engagement portion (left and right convex portions)
127L, 127R Second engagement part (left and right contact part)
128 Angle change mechanism 140 Irrigation device 142 Drilling device H Recessed hole

Claims (6)

  In a transplanter equipped with a traveling propulsion body (14) driven by a prime mover (11) and a planting tool (28) driven up and down by a drive mechanism in a planting transmission case (26), the planting tool ( 28) A transplanter provided with a hole making device (142) that moves up and down around a seedling to be planted in a field to form a concave hole (H).   The hole making body (110) for forming a shallow concave hole (H) in the field around the seedling provided in the hole making device (142) is composed of left and right hole making pieces (121L, 121R). A piece (121L, 121R) is provided so as to be pivotable back and forth around the connecting portion, and the left and right drilling pieces (121L, 121R) are rotated forward and moved downward at a position away from the field. The transplanter according to claim 1, wherein the transplanter is configured to turn to the rear of the machine body as it enters the field.   3. The transplanter according to claim 2, wherein the transplanter is configured to move to the front of the machine body as the left and right drilling pieces (121L, 121R) are moved upward and gradually come out of the field.   A spring (125) for urging the left and right hole-making pieces (121L, 121R) to be rotated forward is provided, and the left and right hole-making pieces (121L, 121R) are rotated forward and rotated backward. 4. The transplanter according to claim 2, wherein a first engaging portion (126 </ b> L, 126 </ b> R) and a second engaging portion (127 </ b> L, 127 </ b> R) are provided to hold the first engaging portion and the second engaging portion, respectively.   The transplanter according to any one of claims 1 to 4, further comprising an angle changing mechanism (128) capable of changing and adjusting an angle at which the hole making body (110) enters the field. .   The irrigation device (140) for supplying water is provided in a concave hole (H) opened on the upper surface of the field by the hole making body (110). The transplanter described in 1.

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