JP2015202060A - transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter capable of reliably forming a transplant hole having a relatively large depth.SOLUTION: A tobacco seedling transplanter 10 includes: a hole opening tool 300 arranged on a travelling vehicle body, forming a transplant hole for transplanting a transplant object in a farm field, and including a conical tip part and a trunk part including a side surface erected more steeply than a conical side surface; a hopper 400 dropping and feeding the transplant object to the transplant hole formed by the hole opening tool 300; a lifting/lowering mechanism 500 lifting/lowering the hole opening tool 300, and a rotating mechanism 600 rotating the hole opening tool 300 in a vertical shaft center.

Description

  The present invention relates to a transplanter equipped with a drilling tool for a transplantation hole so as to be capable of moving up and down.

  A transplanting machine for planting seedlings of leafy vegetables such as onions is equipped with a planting tool in the shape of a bird's beak that can be opened and closed at the lower end of a cylindrical member, as in the example of Patent Document 1, and its lifting range The vegetable seedling is received at the upper end of the paddle, and the planting tool is opened at the descending end and the planting tool is opened.

  On the other hand, as in the example of Patent Document 2, a drilling tool capable of moving up and down and a seedling shooter (seedling guide path) are provided, and a relatively deep transplant hole is formed by a rotating drilling tool. By introducing seedlings from a seedling shooter, it is possible to transplant a specific kind of seedlings.

JP 2009-284858 A China Utility Model Publication No. 2010860571

  However, the transplant hole has a problem in that the periphery of the formed hole may be collapsed as the drilling tool rises, resulting in disturbance of the planting posture of the seedling and insufficient planting depth.

  An object of the present invention is to provide a transplanter capable of reliably forming a relatively deep transplant hole corresponding to seedling transplantation such as a tobacco seedling in consideration of the problems of the conventional transplanter. To do.

The first aspect of the present invention for achieving the above object is as follows:
A drilling tool provided on a traveling vehicle body and forming a transplant hole for transplanting a transplant object in a field, having a conical tip and a barrel having a side that is steeper than the conical side. 300),
A drop supply tool (400) for dropping and supplying the transplant object to a transplant hole formed by the hole drill tool (300);
A vertical movement mechanism (500) for moving the punching tool (300) up and down;
A transplanting machine comprising: a turning mechanism (600) for turning the punching tool (300) about a vertical axis.

The second aspect of the present invention
A transmission section (27) for transmitting a driving force from an engine to the vertical movement mechanism (500) and the rotation mechanism (600);
The rotation mechanism (600)
An output shaft (88) provided in the left-right direction in the transmission section (27);
A transmission shaft (640) provided in the left-right direction;
An endless transmission section (651c, 652c) that transmits the driving force from the output shaft to the drilling tool (300) through the transmission shaft,
The transplanter according to the first aspect of the present invention, wherein the transmission shaft (640) moves up and down following the up-and-down movement of the drilling tool (300).

The third aspect of the present invention
The transplanter according to the second aspect of the present invention, further comprising a pressing member (320) that presses the ground around the transplantation hole formed by the drilling tool (300).

The fourth aspect of the present invention is
The pressing member (320) is the transplanter according to the third aspect of the present invention, wherein the mounting height of the pressing member (320) is adjustable with respect to the punching device (300).

The fifth aspect of the present invention provides
The vertical movement mechanism (500) is configured to move the drilling tool (300) up and down along a loop-like operation locus in a side view,
The rotation mechanism (600) is an axis that converts the rotation direction of the driving force into a direction intersecting the transmission shaft (640) between the transmission shaft (640) and the drilling tool (300). The transplanter according to any one of the second to fourth aspects, further comprising a direction changing unit (660).

The sixth aspect of the present invention provides
The rotation mechanism (600)
An intermediate transmission shaft (630) between the output shaft (88) and the transmission shaft (640);
A first transmission support link (610) having one end portion rotatably disposed around the output shaft (88) and the other end portion rotatably supporting the intermediate transmission shaft (630);
A second transmission support link (620) having one end portion rotatably disposed around the intermediate transmission shaft (630) and the other end portion rotatably supporting the transmission shaft (640); ,
The endless transmission (651c, 652c)
A first endless body (651c) that transmits the driving force from the output shaft (88) to the intermediate transmission shaft (630);
A second endless body (652c) that transmits the driving force from the intermediate transmission shaft (630) to the transmission shaft (640);
In the transplanter according to any one of the second to fifth aspects, the transmission ratio of the second endless body (652c) is higher than the transmission ratio of the first endless body (651c). is there.

The seventh aspect of the present invention
The rotation mechanism (600)
An intermediate transmission shaft (630) between the output shaft (88) and the transmission shaft (640);
A first transmission support link (610) having one end portion rotatably disposed around the output shaft (88) and the other end portion rotatably supporting the intermediate transmission shaft (630);
A second transmission support link (620) having one end portion rotatably disposed around the intermediate transmission shaft (630) and the other end portion rotatably supporting the transmission shaft (640); ,
The endless transmission (651c, 652c)
A first endless body (651c) that transmits the driving force from the output shaft (88) to the intermediate transmission shaft (630);
A second endless body (652c) that transmits the driving force from the intermediate transmission shaft (630) to the transmission shaft (640);
The transmission shaft (rather than a first imaginary straight line connecting the output shaft (88) and the intermediate transmission shaft (630) in a side view over the operating range of the vertical movement of the drilling tool (300). 640) is located on the upper or lower side,
Of the angle formed between the second imaginary line segment connecting the intermediate transmission shaft (630) and the transmission shaft (640) and the first imaginary straight line in a side view, the output shaft (88) and the intermediate transmission The angles (θ, θ ′) between the shaft (630) and the transmission shaft (640) are such that the drilling tool (300) is positioned at or near the bottom dead center of the operating range of the vertical movement. In this case, the transplanter according to any one of the second to fifth aspects is characterized in that it becomes maximum.

In addition, the eighth aspect of the present invention
The first transmission support link (610) or the second transmission support link (620) is disposed outside the first endless body (651c) or the second endless body (652c) with respect to the left-right direction. The sixth or seventh aspect of the present invention is a transplanter according to the present invention.

The ninth aspect of the present invention provides
The vertical movement mechanism (500)
A link mechanism (80, 81, 82, 83, 97, 99) having a swing link (80, 81, 99) swinging in a predetermined direction;
A swing member (84) for operating the swing link (80, 81, 99),
The transplanter according to any one of the second to eighth aspects of the present invention, wherein the output shaft (88) also serves as a drive shaft (88) for rotating the rocking member (84). is there.

The tenth aspect of the present invention is
A guide member (900) for guiding the implant to the drop feeder (400);
The drop feeder (400) is configured such that an attachment position in the vertical direction is adjustable and fixed to the guide member (900), and a lower part is configured to be openable and closable. 2 to 9 is the transplanter of the present invention.

The eleventh aspect of the present invention is
The tenth aspect is characterized in that the opening / closing timing of the lower portion of the drop supply tool (400) is configured to be adjustable with reference to the timing of moving the punching tool (300) up and down. It is a transplanter of the present invention.

The twelfth aspect of the present invention is
The opening / closing timing of the lower part of the drop supply tool (400) is defined to be changeable, and the drive shaft (88) for swinging the hole punch (300) or the hole punch (300) ) Provided with an opening / closing cam (740) arranged to be rotatable together with the output shaft (88) for transmitting the driving force,
The opening / closing timing of the drop supply tool (400) is adjusted by changing a mounting phase of the opening / closing cam (740) with respect to the drive shaft (88) or the output shaft (88). An eleventh aspect of the present invention is a transplanter.

  According to the first aspect of the present invention, a conical tip portion of the drilling tool can be plunged into the soil, and a torso portion (for example, a cylindrical torso) that has a side surface that rises more rapidly than the side surface of the tip portion. The inner wall surface of the hole can be hardened by the driving rotation of the part.

  According to the second aspect of the present invention, the rotation mechanism can be configured relatively easily.

  According to the third aspect of the present invention, the hole can be prevented from collapsing by hardening the ground around the hole.

  According to the fourth aspect of the present invention, the depth of the hole can be changed and the planting depth can be changed.

  According to the fifth aspect of the present invention, in the transmission to the drilling tool that moves down, the transmission configuration can be easily configured while improving the transmission efficiency, and the cost can be reduced.

  According to the sixth aspect of the present invention, the drilling tool can be rotated at a high rotational speed while suppressing a change in the rotational speed of the drilling tool due to the rotation of the first transmission support link, and a good drilling action can be obtained. I can do it.

  According to the seventh aspect of the present invention, when the drilling tool is located at or near the bottom dead center while suppressing the change in the rotation speed of the drilling tool due to the rotation of the first transmission support link, It can be rotated at a high rotation speed, and a good drilling action can be obtained.

  According to the eighth aspect of the present invention, the first transmission support link or the second transmission support link serves as a safety guard.

  According to the ninth aspect of the present invention, the transmission mechanism for the vertical movement and rotation drive of the punching tool is simplified. The vertical movement of the drilling tool and the rotational drive can be interlocked, and the drilling tool 300 does not rotate during movement other than the planting operation, for example, which is safe.

  According to the tenth aspect of the present invention, the drop supply tool can drop the transplant object from a position close to the soil surface corresponding to the depth of the hole (planting depth), and the transplant object can be accurately put into the hole. Can be supplied.

  According to the eleventh aspect of the present invention, it is possible to cope with changes between planted stocks.

  According to the twelfth aspect of the present invention, the drop supply tool can be opened and closed by a simple transmission mechanism. The drop supply tool can be opened and closed with respect to the vertical movement of the drilling tool. The opening / closing timing of the drop supply tool with respect to the vertical movement of the punching tool can be adjusted with a simple configuration and with high accuracy.

The left view of the tobacco seedling transplanter of Embodiment 1 of the present invention The top view of the tobacco seedling transplanter of Embodiment 1 of this invention (A), (b): The bottom view which looked at the tobacco seedling supply part of Embodiment 1 of this invention from the bottom The sectional side view explaining the attachment structure of the supply part 31 of the tobacco seedling transplanter of Embodiment 1 of this invention The schematic left view which shows the structure of the principal part of the tobacco seedling transplanter of this Embodiment Schematic plan view of the rotation mechanism of the tobacco seedling transplanter of the present embodiment Schematic left side view of the rotation mechanism of the tobacco seedling transplanter of the present embodiment Part B enlarged schematic view of FIG. (A): Right side view of the open / close arm drive mechanism of the tobacco seedling transplanter of the present embodiment, (b): Schematic cross section in plan view of the open / close arm drive mechanism The exploded perspective view of the principal part except the opening / closing arm of the opening / closing arm drive mechanism of the tobacco seedling transplanter of the present embodiment (A): Schematic cross-sectional view of the left side of the punching tool of the tobacco seedling transplanter of the present embodiment, (b): Schematic rear sectional view of the punching tool of the tobacco seedling transplanter of the present embodiment The schematic perspective view explaining the structure of the punching tool of the tobacco seedling transplanter of this Embodiment Left side view of lifting mechanism of tobacco seedling transplanter of this embodiment The perspective view seen from the left front of the raising / lowering mechanism of the tobacco seedling transplanter of this Embodiment The perspective view seen from the right back of the raising / lowering mechanism of the tobacco seedling transplanter of this Embodiment (A)-(d): Side view in each position of the drilling tool connected to the lifting mechanism and moving during the drilling operation during the planting operation of the tobacco seedling transplanter of the present embodiment Schematic explaining the configuration of the second stage driven sprocket and the second stage driven sprocket different from the configuration described in FIG. The schematic left view for demonstrating the attachment structure to the body side of the support | pillar of the tobacco seedling transplanter of this Embodiment (A): The schematic perspective view of each part which comprises the 2nd drill main body which is a structural example different from the drill main body of the tobacco seedling transplanter of this Embodiment, (b): The structure of a 2nd drill main body Schematic sectional view showing Schematic left side view schematically showing the configuration of the second rotation mechanism of the tobacco seedling transplanter of the present embodiment

  Hereinafter, embodiments of a transplanter according to the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, the basic configuration of the tobacco seedling transplanter will be described with reference to FIGS. FIG. 1 is a side view showing a tobacco seedling transplanter 10 that transplants tobacco seedlings as an example of a transplanter of a general embodiment, and FIG. 2 is a plan view of the tobacco seedling transplanter 10. In the drawings of the present application, unless otherwise specified, the left side toward the paper surface is the front of the tobacco seedling transplanter 10, and the front is expressed as front, rear, left, and right.

  As shown in FIG. 1, the tobacco seedling transplanter 10 includes an engine 11 and a main transmission case 12 as a prime mover at the front, a pair of left and right front wheels 13 and a rear wheel 14 as traveling wheels (traveling portions), and a rear portion. The planting apparatus 19 includes a supply unit 31 serving as a supply unit for a transplanted object such as a seedling, a pressure reducing wheel 15, and a steering handle 16. The rear wheel 14 is a traveling propulsion body.

  Further, the planting device 19 is supported by the traveling vehicle body (traveling vehicle body) so as to be able to move up and down, and received from the supply unit 31 and a punching tool 300 that forms a transplanting hole for transplanting a tobacco seedling in the heel U. The hopper 400 is configured to drop and supply tobacco seedlings into a transplant hole formed by the punching tool 300 (see FIGS. 1 and 5).

  Further, the tobacco seedling transplanting machine 10 is supplied from an elevating mechanism 500 that supports the punching tool 300 so as to be movable up and down, a rotation mechanism 600 that rotates the punching tool 300 about the vertical axis, and a supply unit 31. And a shooter 900 for guiding the tobacco seedling to be introduced into the hopper 400 (see FIGS. 1 and 5). These will be further described later.

  The hopper 400 of the present embodiment is an example of a drop supply tool of the present invention, the lifting mechanism 500 of the present embodiment is an example of a vertical movement mechanism of the present invention, and the shooter 900 of the present embodiment is This is an example of the guide member of the present invention.

  That is, in this tobacco seedling transplanter 10, the front wheel 13 and the rear wheel 14 travel between the ridges so that the traveling body crosses the ridge U in the field, and the punch 300 is formed at the center position in the left-right width direction on the upper surface of the ridge U. The seedling is planted by dropping the tobacco seedling from the hopper 400 into the transplant hole formed by rotating the.

  Further, as shown in FIG. 2, the left and right ends of the main transmission case 12 are respectively provided with left and right traveling extension cases 40 that can be rotated with respect to the main transmission case 12, and at the respective ends of the left and right traveling extension cases 40. A traveling transmission case 20 is attached. Accordingly, the power in the main transmission case 12 input from the engine 11 is transmitted to the traveling transmission case 20.

  A pair of left and right rear wheels 14 that are traveling wheels are respectively attached to the left and right outer sides of the rotating tip of the traveling transmission case 20, and the airframe is configured to travel 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 part of the engine mounting table 190 so as to be rotatable around the rolling shaft 18 (see FIG. 1) in the front-rear direction. It is set as the structure which attached.

  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 portion of the rear end surface of the rear frame 21 is positioned in the front-rear direction 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 serving as a lifting device is provided at the rear portion of the main transmission case 12 in the center in the left-right direction. The hydraulic lifting cylinder 23 is fixedly provided to a hydraulic pressure switching valve portion 24 (see FIG. 1) serving as a lifting switching portion attached to the main transmission case 12, and oil from a hydraulic pump attached to the main transmission case 12 is provided. It operates by switching the path with the hydraulic pressure switching valve section 24.

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

  Therefore, the traveling transmission 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 rear wheel 14 is moved up and down by the rotation of the traveling transmission case 20, and the traveling machine body is moved up and down. Note that the cylinder rod, the horizontal rod 43, the left rear wheel lifting rod 44, and the right rear wheel lifting rod 45 of the hydraulic lifting cylinder 23 are positioned below a lifting mechanism 500, which will be described later in side view, depending on the advancement position of the cylinder rod. The spacecraft is effectively used to make the aircraft more compact.

  Further, at a position just below the position where the planting tool 28 of the planting device 19 plants the seedlings on the cocoon U at a position below the center of the machine body, the height of the cocoon U upper surface is in contact with the known cocoon U upper surface. A left-side ground position detector 36 and a right-side ground position detector 37 are provided as grounding bodies for detecting the pressure, and the hydraulic pressure switching valve unit 24 is detected by the detection of 畝 U of the left-side ground position detector 36 and the right-side ground position detector 37. The hydraulic lift cylinder 23 is operated via the provided lift control switching valve to raise and lower the left and right rear wheels 14, and the traveling body is controlled to a predetermined height with respect to the heel U, so that the planting tool 28 is a seedling. It is set as the structure with which the depth which plants a cocoon U becomes constant.

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

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

  The hole punching device 300 is a device for forming transplant holes for planting seedlings one by one in a field basket. In the drilling tool 300, power from the main transmission case 12 receives power from the planting transmission case 26 provided on the rear side of the main transmission case 12, and a planting device drive case 27 attached to the planting transmission case 26. And the like, and is moved up and down by the lifting mechanism 500 and rotated by the rotating mechanism 600.

Further, the lifting mechanism 500 has a shape in which the tip of the punching tool 300 is lowered at the front side and raised at the rear side by the lifting and lowering operation of the punching tool 300, and the width in the front-rear direction is larger in the lower part than in the upper part. A trajectory (static trajectory: an operation trajectory when it is assumed that the aircraft is stopped) 17 is drawn, and the operation is repeated in the direction of the arrow in the figure.
(Supply section)
FIG. 3A is a bottom view of the supply unit 31 as viewed from below, and FIG. 3B is a partially transparent top view of the supply unit 31 as viewed from above.

  FIG. 4 is a side sectional view for explaining the attachment structure of the supply unit 31 and shows a cross section passing through the rotation center of the supply turntable 32.

  As shown in FIG. 2, the supply unit 31 is operated by the power from the turntable drive case 38 being transmitted by the rotational force transmitting member 77.

  The supply unit 31 includes a rotatable supply turntable 32 that is provided above the hopper 400 and the shooter 900 and that is rotatably arranged with eight supply cups 33 having openings at the upper and lower ends and fixedly arranged in a loop. A character-shaped supply cup opening / closing guide 35 and a rotation drive mechanism 78 (see FIGS. 3 and 4) for rotating the supply turntable 32 counterclockwise are provided.

  As shown in FIG. 4, the supply turntable 32 is a tray-like member whose outer peripheral edge is bent downward, and both ends are opened to eight holes that are opened at equal intervals near the outer periphery of the circular flat portion. The substantially cylindrical supply cups 33 are fixed through. A rotation shaft that rotates the supply turntable 32 counterclockwise by the rotational force from the rotation drive mechanism 78 is fixedly disposed at the center of the supply turntable 32.

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

  And as shown to Fig.3 (a), the opening-and-closing lid 34 which can be moved to an up-down direction is provided in the bottom part of each supply cup 33, respectively.

  3A, below each supply cup 33, the supply cup 33 is positioned above the shooter 900 by the rotation of the supply turntable 32 in the direction of arrow A (see FIG. 3A). A substantially C-shaped supply cup opening / closing guide 35 with an annular part cut out is fixed to the support column 39 so that the opening / closing lid 34 at the bottom of the supply cup 33 is opened only when it comes to (see 1). The supply cup opening / closing guide 35 restricts the opening / closing lid 34 from being opened by contacting and supporting the opening / closing lid 34 from below at a position other than the predetermined position P.

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

  When the opening / closing lid 34 of the supply cup 33 is opened at the predetermined position P, the seedling in the supply cup 33 falls onto the lower shooter 900 and is supplied to the hopper 400. The hopper 400 opens left and right like a birdcage at a predetermined timing, and drops the seedlings held therein into a transplant hole formed by the drilling tool 300 to plant it.

  Next, the basic configuration of the planting device 19, the shooter 900, the lifting mechanism 500, and the rotation mechanism 600 will be mainly described with reference to FIG.

  FIG. 5 is a schematic left side view showing the configuration of the main part of the tobacco seedling transplanter 10 of the present embodiment.

  As shown in FIG. 5, the drilling tool 300 has a tip 310a that is conical and a body 310b that is fitted into a cylindrical drill body 310 and an upper part of the body 310b, so that the mounting height can be adjusted. A saddle-shaped pressing member 320 and a drill holding portion 330 that rotates while holding the drill main body 310 are provided.

  Thereby, the conical tip portion 310a of the punching tool 300 can be plunged into the soil of the ridge U, and the cylindrical barrel portion 310b having a side surface that rises more rapidly than the side surface of the tip portion 310a. The inner wall surface of the transplant hole can be solidified by driving rotation.

  In addition, when the punching tool 300 enters the soil, the distal end portion 310a and the trunk portion 310b form a transplant hole, and the inclined surface of the pressing member 320 presses the shoulder of the transplant hole. The collapse of the opening edge can be prevented.

  Moreover, since the pressing member 320 is comprised so that attachment height can be adjusted with respect to the drill main body 310, the depth of a transplant hole can be changed and the planting depth can be changed.

  The punching tool 300 will be further described later with reference to FIGS.

  Next, the hopper 400 includes a hopper stay 410 in which elongated holes 410a are formed on the left and right sides, and a hopper main body 420 that is connected to the lower end portion of the hopper stay 410 so as to be opened and closed on the left and right. An open / close rod 430 for opening and closing the hopper body 420 at a predetermined timing is fixed. One end portion 430a side of the opening / closing rod 430 is connected to an opening / closing mechanism (not shown) of the hopper body 420, and the other end portion 430b is connected to an opening / closing arm 710 (see FIG. 8A) described later. The opening / closing timing of the lower part of the hopper 400 is configured to be adjustable with reference to the timing of moving the opening tool 300 up and down.

  As a result, changes between planted stocks can be handled.

  Next, the shooter 900 is a slide having a U-shaped cross section, and the right wall surface 900R is fixed to the auxiliary plate 79 fixed to the main frame 22 by welding or the like in a side view. Further, the left wall surface 900 </ b> L of the shooter 900 is a portion where the short side portion having an L-shaped cross section is welded and fixed to the support 39 side in a side view and overlaps the shooter fixing plate 701 of the long side portion extending downward. It is fixed by welding. In addition, two hopper stay fixing pins 702 are fixed to the lower portions of the left and right wall surfaces 900L and 900R of the shooter 900 at positions corresponding to the long holes 410a formed in the hopper stay 410 by welding or the like. .

  With the above configuration, since the shooter fixing plate 701 is connected to the main frame 22 via the shooter 900 and the auxiliary plate 79, the shooter 900 supports the rotation driving mechanism 78 below the supply turntable 32. It also serves to reinforce 39.

  By inserting the hopper stay fixing pin 702 into the elongated hole 410a formed in the hopper stay 410 and fixing it with a fastening member such as a nut at a predetermined position, the mounting height of the hopper body 420 is set to a desired planting. Depending on the depth, appropriate adjustments are possible. That is, it is easier for the seedling to enter the hole when the lower end of the hopper body 420 is brought close to the surface of the heel U.

  Further, by placing a PVC (polyvinyl chloride) sheet (not shown) that hangs down from the bottom surface 900S of the shooter 900 toward the inside of the hopper body 420, the seedling that slides down from the shooter 900 into the hopper body 420 is in the middle. It falls smoothly without being caught by.

  Note that the PVC sheet (not shown) is not limited to the above arrangement, and may be attached so as to cover the opening side located a predetermined distance above the bottom surface 900S of the shooter 900 and hang down to the inside of the hopper body 420, for example. . This prevents mud, rain and wind, and prevents the seedling from being caught on the rear side of the hopper stay 410 or the hopper body 420. In addition, it is desirable that the structure can be removed and cleaned even when mud is clogged.

  Further, by making it possible to change the mounting height of a PVC sheet (not shown) that covers the opening side located a predetermined distance above the bottom surface 900S of the shooter 900, the distance from the bottom surface 900S to the PVC sheet can be changed. It is good also as a structure which can adjust the cross-sectional area of the passage of a seedling by narrowing or widening. For example, if the distance is narrowed, the seedlings are less likely to fall down and take a posture. In addition, depending on the type of seedling, narrowing may cause clogging in the middle of the shooter 900. Therefore, as described above, a configuration that can change the mounting height of the PVC sheet is preferable.

  Further, as a mechanism that can freely adjust the distance from the bottom surface 900S to the PVC sheet, for example, a rotatable plate member that presses the PVC sheet from the outside is attached to the shooter, and the plate member is rotated. Therefore, the degree of pressing the PVC sheet may be varied.

  The PVC sheet (not shown) is not limited to the above-described arrangement. For example, the PVC sheet is folded in a substantially U-shape from the front inner wall surface of the hopper body 420 toward the left and right inner wall surfaces. By providing (not shown) inside the hopper, it is possible to prevent the seedling from sticking and mud and to guide the holding position of the seedling. That is, by improving the sitting of the seedling, the hopper body 420 is opened, and the drop position accuracy when the seedling falls is improved.

  Furthermore, a configuration may be adopted in which a rubber sheet (not shown) or the like is fixed to the inner wall side of the left wall surface 900L of the shooter 900 and where the opening / closing lid 34 hits. As a result, it is possible to reduce the sound that the open / close lid 34 strikes on the inner wall side of the left wall surface 900 </ b> L of the shooter 900.

  Next, the elevating mechanism 500 includes a driving force from a rotating cam drive shaft 88 (see FIGS. 5 and 13 to 14) that is a first output shaft protruding to the left side of the planting device drive case 27, and planting. Lift using the driving force from the crank arm drive shaft 89 (see FIGS. 5 and 15), which is the second output shaft protruding to the right side of the device drive case 27, to swing the drilling tool 300 up and down and back and forth. By the operation, a loop-like operation locus (static locus) 17 (see FIG. 1) is drawn in a side view. This will be further described later.

  Next, the rotation mechanism 600 will be described with reference to FIGS.

  6 is a schematic plan view of the rotation mechanism 600, and FIG. 7 is a schematic left side view of the rotation mechanism 600.

  As shown in FIGS. 5 to 7, in the rotation mechanism 600, one end 610 a is rotatably disposed around the rotation cam drive shaft 88, and the other end 610 b supports the counter shaft 630 so as to be rotatable. A long plate-shaped first transmission support link 610 and one end portion 620a are rotatably arranged around the counter shaft 630, and the other end portion 620b is a long plate-shaped second plate that rotatably supports the transmission shaft 640. The first transmission support link 610 and the second transmission support link 620 are rotatably connected via a counter shaft 630. Further, the transmission shaft 640 is rotatably connected to the drill holding unit 330 via the bevel gear device 660. Here, the bevel gear device 660 of the present embodiment corresponds to an example of the axial direction conversion unit of the present invention.

  Further, as shown in FIG. 6, a first-stage drive sprocket 651a is fixed to the rotating cam drive shaft 88 on the right side of the first transmission support link 610 with respect to the left and right direction of the traveling vehicle body in plan view, as shown in FIG. A first-stage driven sprocket 651b is fixed to the shaft 630 on the right side of the first transmission support link 610 with respect to the left-right direction of the traveling vehicle body.

  Further, as shown in FIG. 6, the counter shaft 630 has a second stage on the left side of the second transmission support link 620 and on the right side of the first-stage driven sprocket 651b with respect to the left-right direction of the traveling vehicle body in plan view. A drive sprocket 652a is fixed. Similarly, in the transmission shaft 640, the second-stage driven sprocket 652b is located on the left side of the second transmission support link 620 and on the right side of the first-stage driven sprocket 651b with respect to the left-right direction of the traveling vehicle body in plan view. It is fixed.

  Then, a first chain 651c that transmits the driving force from the engine 11 from the rotating cam driving shaft 88 to the counter shaft 630 and a second chain 652c that transmits the driving force from the counter shaft 630 to the transmission shaft 640 are installed. ing.

  That is, the first chain 651c and the second chain 652c are arranged between the first transmission support link 610 and the second transmission support link 620 with the left-right direction as a reference in plan view.

  As a result, the first transmission support link 610 and the second transmission support link 620 serve as a safety guard for the first chain 651c and the second chain 652c, and a structure in which a hand or the like hardly enters the rotating chain.

  Further, the first transmission support link 610 and the second transmission support link 620 are arranged in the left-right direction (lateral direction) of the chain in a plan view, so that the shafts of the respective sprockets are held, and the drill body 310 It is possible to follow the movement in the up / down and front / rear directions accompanying the drilling operation.

  Further, in the present embodiment, in order to rotate the drilling tool 300 with the vertical axis, the bevel gear device 660 that changes the rotation direction in a direction orthogonal to the transmission shaft 640 with the horizontal direction as the axis is provided. The transmission shaft 640 is also used as the input shaft of the bevel gear device 660.

  The bevel gear device 660 will be further described later.

  With the above configuration, the other end portion 620b of the second transmission support link 620 is connected to the drill holding portion 330 of the drilling tool 300 via the transmission shaft 640, that is, the bevel gear device 660, so that it can move up and down. The shaft 640 moves up and down following the operating locus 17 of the vertical movement of the drilling tool 300, and can rotate the drill body 310 and the pressing member 320 about the vertical axis through the bevel gear device 660. I can do it.

  Further, as described above, since the drill body 310 is rotated by the two-stage chain, the rotation mechanism 600 can be realized with a simple structure, and the cost can be reduced.

  Further, as described above, the rotation cam drive shaft 88, which is one of the drive shafts of the elevating mechanism 500, has a function as a drive shaft for transmitting the drive force from the engine 11 to the rotation mechanism 600. Thus, the transmission mechanism for the vertical movement of the punching tool 300 and the rotational drive of the rotation mechanism 600 is simplified. Further, the vertical movement of the punching tool 300 and the rotational drive of the rotation mechanism 600 can be linked.

  In the transplanter 10 of the present embodiment, the number of teeth of the first stage drive sprocket 251a and the first stage driven sprocket 251b is set to be the same, and the second chain 652c is larger than the transmission ratio of the first chain 651c. The transmission ratio is higher. Thereby, by setting the same number of teeth, the transmission ratio is changed while suppressing the change in the rotation speed of the drilling tool 300 due to the rotation of the first transmission support link 610, so that the drilling tool 300 is rotated at a high speed. It can be rotated at a speed, and a good drilling action can be obtained.

  Further, as shown in FIG. 7, in the transplanter 10 of the present embodiment, the first virtual straight line (the first virtual line in FIG. 7) passing through the axis of the rotating cam drive shaft 88 and the axis of the counter shaft 630 in side view. 1 is a straight line that includes one center line 631 and extends further on both sides), so that at the time of planting, that is, the drilling tool 300 is bottom dead center or bottom dead. When the vicinity of the point is reached, the rotation speed of the second chain 652c increases in proportion to the movement when the second transmission support link 620 rotates clockwise.

  More specifically, in the transplanter 10 of the present embodiment, the first center line 631 connecting the axis of the rotating cam drive shaft 88 and the axis of the counter shaft 630 in the side view, and the counter shaft The angle θ (see FIG. 7) formed by the second center line 632 connecting the shaft center of 630 and the shaft center of the transmission shaft 640 is the bottom dead center or This is the maximum configuration when located near the dead center. Thereby, when the drilling tool 300 passes through the bottom dead center, it is most accelerated and can be rotated at a high rotation speed, and a better drilling action can be obtained.

  Here, the rotating cam drive shaft 88 of the present embodiment is an example of the output shaft of the present invention and also an example of a drive shaft for rotating the first swing member of the present invention. The counter shaft 630 of the present embodiment is an example of the intermediate transmission shaft of the present invention, and the transmission shaft 640 of the present embodiment is an example of the transmission shaft of the present invention. The first chain 651c of the present embodiment is an example of the first endless body of the present invention, and the second chain 652c of the present embodiment is an example of the second endless body of the present invention. Further, the concept encompassing the first chain 651c and the second chain 652c of the present embodiment corresponds to an example of the endless transmission portion of the present invention. The first center line 631 of the present embodiment is an example of a portion that is on the first imaginary straight line of the present invention and limited by two points on the first imaginary straight line, and is the second center of the present embodiment. The line 632 corresponds to an example of the second virtual line segment of the present invention. Further, “the angle θ formed by the first center line 631 and the second center line 632” in the present embodiment is the “second imaginary line connecting the intermediate transmission shaft and the transmission shaft in a side view” of the present invention. This is an example of the “angle between the output shaft, the intermediate transmission shaft, and the transmission shaft among the angles formed by the minute and the first virtual straight line”.

  Next, the rotation cam drive shaft 88 protruding to the left side of the planting device drive case 27 and the configuration of the periphery thereof will be described in more detail with reference to FIG. FIG. 8 is an enlarged schematic diagram of a B part in FIG. 6.

  As shown in FIG. 8, the distal end portion of the rotating cam drive shaft 88 is inserted and fixed in a through hole 615 c formed in a cylindrical transmission support link holding member 615. The transmission support link holding member 615 has a first-stage driving sprocket 651a integrally formed at the outer peripheral edge 615a at the distal end side, and a rocking driving cam to be described later on a base-side outer peripheral surface 615b having a smaller outer diameter. 84 is inserted and fixed.

  Further, the bottom surface of the transmission support link holding member 615 communicates with the through hole 615c, and a recess 615d having an inner diameter larger than that of the through hole 615c is formed. The bearing member 616 is inserted and fixed in the recess 615d. Has been. The bearing member 616 has a transmission support link connecting pin 617 whose cross section of a rod-like portion excluding a sliding surface with the bearing member 616 has a quadrangular shape. And is rotatably held without contacting the tip surface 88a of the rotating cam drive shaft 88. Further, the transmission support link connecting pin 617 is provided with a through-hole having a quadrangular cross section that fits with the square outer peripheral portion of the transmission support link connecting pin 617 formed at one end 610a of the first transmission support link 610. The transmission support link connecting boss 617a is fitted and fixed by a fastening member.

  With the above configuration, the rotatable transmission support link connecting pin 617 used for the first transmission support link 610 can be added without replacing the existing rotation cam drive shaft 88 that drives the elevating mechanism 500.

  Further, with the above configuration, the rotation cam drive shaft 88 can also be used as a rotation drive shaft of the drilling tool 300, so that the transmission mechanism for the vertical movement and rotation drive of the drilling tool is simplified.

  Further, the first stage drive sprocket 651a for rotating the drilling tool 300 and the swinging drive cam 84 for vertical movement of the drilling tool 300 are integrated by the transmission support link holding member 615, thereby planting. The drilling tool 300 can be moved in conjunction with the operation. That is, since the drilling tool 300 does not rotate during, for example, movement other than planting work, it is safe.

  In addition, the planting transmission case 106 of this Embodiment corresponds to an example of the transmission part of this invention.

  Next, the opening / closing cam drive projecting to the right side of the planting transmission case 26 on the right side of the planting device drive case 27 is coaxial with the rotating cam drive shaft 88 projecting to the left side of the planting device drive case 27 described above. The configuration of the shaft 788 and the surrounding opening / closing arm driving mechanism 700 will be described with reference to FIGS. 9B, 9B, and 10. FIG.

  FIG. 9A is a right side view of the opening / closing arm driving mechanism 700 for opening and closing the hopper 400 and adjusting the opening / closing timing, and FIG. 9B is a plan view of the opening / closing arm driving mechanism 700. FIG. FIG. 10 is an exploded perspective view of the main part excluding the opening / closing arm 710 of the opening / closing arm driving mechanism 700.

  As shown in FIGS. 9A to 10, a round hole 788 a is formed at the tip of the opening / closing cam drive shaft 788, and the tip is formed at the center of the substantially cylindrical opening / closing boss 720. An open / close cam drive shaft 788 is used by using a fixing screw 730 in which a rod-shaped pin 732 having a smaller diameter than the screw portion 731 on the root side is inserted into the circular hole 788a. And the opening / closing boss 720 are fixed.

  Further, on the side surface of the opening / closing boss 720, a tapped hole 722 in which a screw groove that engages with the screw portion 731 of the fixing screw 730 is formed on the inner peripheral surface is provided toward the concave portion 721 in the central portion, and the cylindrical shape is formed. A cylindrical guide protrusion 723 having a small diameter is formed at the center of the upper surface, and on the upper surface, on both sides of the protrusion 723, an outer peripheral surface that allows adjustment of the mounting position (phase) of the opening / closing cam 740 is provided. A threaded phase adjustment pin 724 is erected.

  Further, the opening / closing cam 740 has a through hole 741 into which the guide protrusion 723 is rotatably inserted, and the through hole 741 is formed to be rotatable with the phase adjusting pin 724 inserted therein. An arc-shaped long hole 742 is formed at the center. By inserting the phase adjustment pin 724 and the guide projection 723 of the opening / closing boss 720 into the elongated hole 742 and the through hole 741 of the opening / closing cam 740 and attaching the thumbscrew 750 to the phase adjustment pin 724, the opening / closing cam 740 opens and closes. The configuration is fixed to the boss 720.

  In addition, a plurality of punch marks 725 are stamped on the upper surface of the opening / closing boss 720 at a position that can be seen through the long hole 742 of the opening / closing cam 740, which is a guideline for changing the phase when the opening / closing cam 740 is assembled.

  On the other hand, as shown in FIG. 9A, the substantially triangular opening / closing arm 710 is rotated to the opening / closing arm stay 713 on the airframe side by an opening / closing arm rotation shaft 711 connected to a substantially right-angled corner portion in a side view. It is held freely. The other end 430b of the open / close rod 430 for opening and closing the hopper body 420 at a predetermined timing is connected to the upper corner of the open / close arm 710. An opening / closing roller 712 is rotatably fixed to the remaining corner of the opening / closing arm 710, and an outer peripheral end surface of the opening / closing roller 712 is always in contact with a peripheral edge of the opening / closing cam 740.

  As described above, in the present embodiment, a function as a drive shaft for transmitting the drive force from the engine 11 to the rotation mechanism 600 to the rotation cam drive shaft 88 that is one of the drive shafts of the elevating mechanism 500. And the function as the opening / closing cam drive shaft 788, the vertical movement of the hole punching tool 300, the rotational drive of the rotation mechanism 600, and the opening / closing operation of the hopper body 420 are linked to each other. The mechanism to operate can be realized easily.

  With the above configuration, the opening / closing cam drive shaft 788 rotates to rotate the opening / closing cam 740, and the opening / closing roller 712 of the opening / closing arm 710 rotates along the peripheral edge of the opening / closing cam 740. Swings in the direction of arrow C about the opening / closing arm rotation shaft 711 as an axis. Further, the opening / closing cam drive shaft 788 is the same shaft as the rotary cam drive shaft 88 that is one of the drive shafts for moving the drilling tool 300 up and down. Thus, the hopper body 420 can be opened and closed.

  Further, by using the long hole 742 and the punch mark 725 of the opening / closing cam 740, the attachment position of the opening / closing cam 740 with respect to the opening / closing boss 720 fixed to the opening / closing cam drive shaft 788 which is the same axis as the rotating cam drive shaft 88 ( (Phase) can be adjusted efficiently.

  Moreover, since the timing which opens and closes the hopper main body 420 can be changed, it can respond to the change between planting stocks.

  Next, the punching tool 300 will be further described with reference to FIGS.

  FIG. 11A is a schematic cross-sectional view of the left side of the punching tool 300, and FIG.

  FIG. 11A illustrates the pressing member 320 in order to show a state where the pressing member 320 is attached to the drill body 310, but the pressing member 320 is omitted in FIG. 11B. Further, since the drill body 310 is rotatably held with respect to the drill holding portion 330, in FIG. 11A, the pressing member attachment height adjusting plate 312 is positioned in parallel to the left and right side surfaces. FIG. 11B shows a state in which the pressing member attachment height adjusting plate 312 is positioned in parallel with the front and back surfaces.

  As described with reference to FIG. 5, the drilling tool 300 includes a drill main body 310, a pressing member 320, and a drill holding portion 330.

  As shown in FIGS. 11A to 12, the drill body 310 has a hollow pipe 311 inserted and fixed inside a hollow tip portion 310 a and a hollow body portion 310 b, and the rest of the drill body 310. The half is configured to be exposed to the outside from the body portion 310b. FIG. 12 is a schematic perspective view illustrating the configuration of the punching tool 300.

  As a result, the tip portion is conical, and the subsequent barrel portion is cylindrical, so that a drill shape suitable for forming a transplant hole can be realized, and the drill body 310 has a hollow structure. Can be achieved.

  A pair of pressing member attachment height adjustment plates 312 is fixed to the axially symmetrical position on the exposed surface of the hollow pipe 311. The pressing member attachment height adjusting plate 312 is provided with three attachment holes 312a in the vertical direction.

  Further, the pressing member 320 is provided with a through-hole 322 at the center thereof, and a pair of pressing member fixtures 321 is provided upright at the opening edge portion. The pressing member fixture 321 has one fixing hole 321a, and is provided on the surface of the pressing member attachment height adjustment plate 312 when the drill body 310 is inserted into the through hole 322 of the pressing member 320. It can be attached to any of the three attachment holes 312a having different heights by a fastening member.

  Thereby, the mounting height of the pressing member 320 with respect to the drill body 310 can be changed in three stages. That is, the width of the shoulder of the hole can be changed.

  Next, the drill holding part 330 will be described with reference to FIGS.

  The drill holding unit 330 includes a drill stay 340 that rotatably holds the drill body 310, a drilling tool connection guide 350 that connects the drilling tool 300 and the lifting mechanism 500, a bevel gear device 660, and an input of the bevel gear device 660. A bevel stay 360 fixed to the upper part of the drill holding unit 330 is provided in a state where the transmission shaft 640 as a shaft is inserted into the opening 361 and the bevel gear device 660 is fixed.

  That is, the drill stay 340 is a square-shaped bonoid member 341 in plan view, and is provided with a cylindrical drill holding ring 342 that is open upward and downward and penetrates the center thereof. Two protrusions 343 each having one through hole 343a are provided on the tip side. In addition, two concave portions 344 are provided at the root portion of each convex portion 343. Inside the drill holding ring 342, the hollow pipe 311 exposed from the drill main body 310 is rotatably held.

  Moreover, the punching tool connection guide 350 is a rectangular box-shaped member in plan view, and has a circular opening 351 on the upper surface without a bottom surface. Further, the left side wall 352 of the drilling tool connection guide 350 is provided with a rotating upper shaft 95 and a rotating lower shaft 96 (see FIG. 13) used for vertical swinging of the lifting mechanism 500 described later. 353 is provided with a right rotation lower shaft 97a (see FIG. 15) used for vertical swinging of the lifting mechanism 500 described later. In addition, two bolts 354a protrude and are fixed to the front side wall and the rear side wall 354, respectively.

  The bevel gear device 660 includes a first bevel gear 662 fixed on a transmission shaft 640 as an input shaft, and a second bevel gear 663 fixed to an upper end of the bevel shaft 664 as an output shaft, inside the bevel case 661. The shaft center of the transmission shaft 640 and the shaft center of the bevel shaft 664 are orthogonally arranged.

  The bevel stay 360 is a substantially U-shaped plate-like member in plan view, and two through holes 362a are provided on both sides 362 facing the U-shape. Further, an opening 361 for inserting a transmission shaft 640 as an input shaft of the bevel gear device 660 is formed in a middle side 363 between both sides 362 of the U-shape, and a bevel case 661 is fixed above the opening 361. A through hole 363a for inserting a fastening member is formed. The bevel stay 360 fixes the bevel gear device 660 and also serves as a lid on the input shaft side of the bevel case 661.

  In the above configuration, the drilling tool connection guide 350 is disposed on the drill stay 340 in which the drill body 310 to which the pressing member 320 is fixed is rotatably held via the hollow pipe 311, and the drilling tool In a state where the bolt 354a provided on the connection guide 350 is inserted into the recess 344 provided on the drill stay 340 side, both are fixed by a fastening member such as a nut. Further, a bevel stay 360 to which the bevel gear device 660 is fixed is disposed at the upper portion thereof, and the bevel shaft 664 is connected to the upper end portion of the hollow pipe 311 exposed from the drill main body 310, and a through hole 362 a provided in the bevel stay 360. These are securely fixed by bolts and nuts using the through holes 343a provided in the drill stay 340.

  As described above, the bevel stay 360, the bevel gear device 660, and the drill stay 340 are individually configured, so that the connection guide used when the planting tool is connected to the lifting mechanism in the conventional device is used as it is. Since it can be used as the drilling tool connection guide 350 used when connecting the drilling tool 300 in the form of the raising / lowering mechanism 500, it becomes a structure which can be retrofitted.

  Note that a hose (not shown) connected to a water tank (not shown) is inserted into the bevel case 661 through a rotary valve (not shown), and a bevel shaft (FIG. 11B) having a hollow inside. 664), water may be sent to the inside of the hollow pipe 311 and water may be discharged to the outside from a hole (not shown) provided in the lower side surface of the body 310b of the drill body 310.

  Accordingly, since the hole can be drilled while discharging water from the trunk portion 310b, water can be applied to the inner wall surface of the transplant hole, so that the transplant hole can be reliably formed even in a dry field.

  Further, the water supply path from the water tank is the same as described above, and if a hole is provided in the tip 310a of the drill body 310 and water is intermittently supplied, it can be used as an irrigation device.

  Next, the detailed configuration and operation of the lifting mechanism 500 will be described with reference to FIGS.

  13 is a left side view of the elevating mechanism 500, and FIGS. 14 and 15 are a perspective view of the elevating mechanism 500 viewed from the left front and a perspective view viewed from the right rear, respectively. 14 and 15, the illustration of the rotation mechanism 600 is omitted.

  In the lifting mechanism 500 of the present embodiment, on the left side of the planting device drive case 27, the upper end is pivotally supported by the swing cam drive shaft 88 and the lower end is pivotally connected by the lower front shaft 91. An upper end is fixed to a front swing arm 80 connected to the support plate 94 and an upper rear shaft 90 (see FIG. 14) which is a pivot point pivotable with respect to the planting device drive case 27, and a lower end is A front rear swing arm 80 and a left rear swing arm 81 provided parallel to the front and rear are connected to a connection support plate 94 so as to be rotatable by a lower rear shaft 93. The other end of the upper rear shaft 90 protrudes to the right side of the planting device drive case 27, and the upper end of the right rear swing arm 99 is fixed to the right side of the planting device drive case 27 (FIG. 15). reference). The front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 serve as a first swing link (front / rear swing link) that swings in the front-rear direction. Further, the lower rear shaft 93 and the connecting support plate 94 serve as a connecting portion that connects the swinging tip side of the front and rear swing link.

  The planting device drive case 27 transmits the power output from the planting transmission case 26, penetrates the swing cam drive shaft 88 provided to project to the left side, and the planting device drive case 27 and projects to the left and right sides. The crank arm drive shaft 89 serving as a vertically swinging drive shaft (drive shaft) provided is driven.

  Further, the front end is pivotally supported by the upper shaft 92 and the lower rear shaft 93 of the connection support plate 94, and the rear ends are respectively provided on the left side wall of the drilling tool connection guide 350 of the drilling tool 300. A parallel upper arm 82 and a left arm 83 are rotatably connected to a moving upper shaft 95 and a rotating lower shaft 96. On the right side of the planting device drive case 27, the front end is pivotally supported at the lower end portion of the right rear swing arm 99, and the rear end is provided on the right side wall of the drilling tool connection guide 350 of the drilling tool 300. And a right arm 97 rotatably connected to the right rotation lower shaft 97a. The upper arm 82, the left arm 83, and the right arm 97 serve as a second swing link (vertical swing link) that swings in the vertical direction.

  The right arm 97 is arranged in parallel with the left arm 83, and is connected to the left arm 83 by a left and right connecting rod 98 pivotally supported at both ends by the left arm 83 and the 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 device drive case 27, and a rotary connecting shaft 106 provided at the tip of the crank arm 85 are pivotally connected to one end. Is provided with a connecting arm 86 whose other end is connected to a middle portion of the left and right connecting rod 98. The left and right connecting rods 98 are rotatably connected to the connecting arm 86. The crank arm 85 serves as a second swing member (vertical swing member, drive member).

  Further, the connecting arm 86 causes interference with other members (for example, the left and right connecting rods 98) when the vertical swing by the second swing link is increased in order to reduce the drag of the drill body 310. In order to avoid it, it is configured to be curved (see FIGS. 5 and 15).

  In addition, a rocking drive cam 84 that is fixed to a rocking cam drive shaft 88 that protrudes to the left from the planting device drive case 27 and rotates is provided. A rotation roller 87 is provided in the middle of the swing arm 81 near the upper rear shaft 90 so as to be rotatable. The swing drive cam 84 serves as a first swing member (back and forth swing member).

  In addition, by expanding the outer shape of the oscillating drive cam 84, the drag of the drill body 310 can be reduced, which is effective, for example, when widening between the stocks.

  Further, provided between the support pin provided in the planting transmission case 26 and the lower end portion of the left rear swing arm 81, the front swing arm 80 and the left rear swing arm 81 are biased toward the front of the body. In addition, a tension spring 167 (see FIG. 5) for contacting the swing drive cam 84 and the rotation roller 87 is provided.

  With this configuration, the elevating mechanism 50 causes the tip of the punching tool 300 to act as the operation locus 17 as an operation locus (static locus) when it is assumed that the traveling of the tobacco seedling transplanter 10 is stopped during the planting operation. It works like drawing.

  Next, the operation of the lifting mechanism 500 will be described.

  FIG. 16A to FIG. 16D show side views at each position of the drilling tool 300 that is connected to the lifting mechanism 500 and moves during the drilling operation during the planting operation. FIG. 16A shows a side view at the top dead center, and FIG. 16C shows a side view at the bottom dead center. FIG. 16 (b) shows a side view when descending from top dead center toward bottom dead center, and FIG. 16 (d) shows when rising from bottom dead center toward 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 via the upper rear shaft 90 also swings back and forth together with the left rear swing arm 81.

  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 left arm is connected via the connecting arm 86 and the left and right connecting rods 98. 83 and the right arm 97 swing up and down, and the upper arm 82 swings up and down together with the left arm 83.

  Therefore, since the front swing arm 80, the left rear swing arm 81 and the right rear swing arm 99, the upper arm 82, the left arm 83, and the right arm 97 are all parallel link mechanisms, the upper arm 82, the left The drilling tool 300 that is pivotably connected to the arm 83 and the right arm 97 is operated with its tip 310a maintained in a vertically downward direction with its lower end drawn in the operating locus 17, The main body 310 and the pressing member 320 can turn into the soil from the tip portion 310a while rotating, and the planting hole can be surely formed in the ridge U with an appropriate posture.

  As shown in FIG. 13, the lifting mechanism 500 is arranged such that the position of the rotating lower shaft 96 to which the left arm 83 is connected is located in front of the rotating upper shaft 95 to which the upper arm 82 is connected. doing.

  By disposing the rotating lower shaft 96 in front of the rotating upper shaft 95, it is possible to suppress the interval between the upper arm 82 and the left arm 83 from being narrowed when the drilling tool 300 is lowered.

  With this configuration, when the drilling tool 300 is in the vicinity of the bottom dead center, the distance between the upper arm 82 and the left arm 83 can be maintained wide, so that a stable drilling operation can be performed without rattling in the drilling operation.

  In the above-described embodiment, the configuration in which the first chain 651c and the second chain 652c are arranged between the first transmission support link 610 and the second transmission support link 620 in plan view has been described. For example, in plan view, the first transmission support link 610 may be disposed on either the right side or the left side of the first chain 651c, and the second transmission support link 620 may be disposed on the right side or the left side of the second chain 652c. Any of them may be arranged.

  Moreover, although the said embodiment demonstrated the structure which arrange | positions the 1st chain 651c and the 2nd chain 652c between the 1st transmission support link 610 and the 2nd transmission support link 620 by planar view, it is not restricted to this. For example, a structure may be provided in which a chain cover that covers the chain is provided on at least one of the first chain 651c and the second chain 652c.

  In the above embodiment, the configuration in which the transmission ratio of the second chain 652c is higher than the transmission ratio of the first chain 651c has been described. The configuration for realizing this is not limited to the configuration in which the number of teeth is changed between the second-stage driven sprocket 252a and the second-stage driven sprocket 252b. For example, the second-stage driven sprocket 252a is a recombination type and is used together with the second chain 652c. It is good also as a structure which changes the rotational speed of the drill main body 310 by replacing | exchanging.

  In addition, the rotation mechanism 600 may be configured to prevent frame skipping by providing a chain tensioner composed of an arm and a roller in each of the first chain 651c and the second chain 652c. Further, in the configuration in which the second-stage drive sprocket 252a is a recombination type, by adopting this chain tensioner, it is possible to reliably absorb the slack of the chain, so there is no need to replace the second chain 652c.

  Here, a configuration example for changing the rotation speed of the drill body 310 will be described with reference to FIG.

  FIG. 17 is a schematic diagram illustrating a configuration of a second stage driven sprocket and a second stage driven sprocket different from the configuration described in FIG. 6. The same components as those in FIG. 6 are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 17, another counter shaft 1630 is provided with a boss portion 1631 having a shaft diameter thicker than both sides thereof, and the boss portion 1631 has a tap hole 1631a. Another counter shaft 1630 has a second-stage drive small-diameter sprocket 1652a loosely fitted on the second transmission support link 620 side on both sides of the boss portion 1631 and two-stage on the first transmission support link 610 side. A second-stage drive large-diameter sprocket 2652a having more teeth than the eye-drive small-diameter sprocket 1652a is loosely fitted. The second-stage driving small-diameter sprocket 1652a and the second-stage driving large-diameter sprocket 2652a are formed with through holes 1652h and 2652h for inserting bolts 1631b at positions corresponding to the tap holes 1631a of the boss portion 1631. ing.

  On the other hand, the transmission shaft 640 includes a second-stage driving small-diameter sprocket 1652a, a small-diameter-compatible sprocket 1652b to which a driving force is transmitted via a small-diameter second chain 1652c, and a second-stage driving large-diameter sprocket 2652a. A large-diameter sprocket 2652b to which a driving force is transmitted via the large-diameter second chain 2652c is fixed.

  With the above configuration, the rotation speed of the drill main body 310 can be easily switched by fixing the second-stage driving small-diameter sprocket 1652a or the second-stage driving large-diameter sprocket 2652a to the boss portion 1631 with the bolt 1631b.

  In FIG. 17, the configuration example using the bolt 1631b has been described. However, the configuration is not limited thereto. For example, the boss 1631 and the second-stage driving small-diameter sprocket 1652a or the second-stage driving large-diameter sprocket 2652a. The rotation speed of the drill body 310 can be easily switched without using a tool by fixing the pin.

  The structure for attaching the support column 39 for determining the height of the supply turntable 32 described in the above embodiment to the machine body will be further described with reference to FIG.

  FIG. 18 is a schematic left side view for explaining a structure for attaching the support column 39 to the machine body side, and shows a main part necessary for the explanation.

  As shown in FIG. 18, on a top surface of the planting transmission case 26 and the planting device driving case 27, a column fixing base 800 for fixing the column 39 at the rear and upper position of the machine body is fixed with bolts. . Further, the column fixing base 800 can be adjusted to slide in height and rear, and an opening / closing arm stay 713 that rotatably supports the opening / closing arm rotation shaft 711 described in FIG. 9A is also integrated. Configured.

  As a result, by adjusting the height of the column fixing base 800 or by sliding backward, the mounting position of the supply turntable 32 can be increased, and the drop height by the shooter 900 can be secured.

  In the above embodiment, the configuration in which the inside of the supply cup 33 into which the operator puts the seedling is a substantially cylindrical space has been described. However, the present invention is not limited to this. In order to prevent the seedling from falling in the supply cup 33 when the size of the supply cup 33 is small, a plate-like member for reducing the internal volume of the supply cup 33 is inserted obliquely from the opening of the supply cup 33 to the inside. The front end portion of the plate-like member that curves downward from the opening edge of the cup 33 may be fixed to the outer peripheral surface of the supply cup 33 with a bolt.

  Moreover, in the said embodiment, although the height of the drill main body 310 was a structure which cannot be changed at arbitrary timings, it is not restricted to this, For example, as shown in FIG. good. FIG. 19A is a schematic perspective view of each part constituting the second drill main body 1310, and FIG. 19B is a schematic cross-sectional view showing the configuration of the second drill main body 1310.

  As shown in FIGS. 19A and 19B, the second drill main body 1310 includes a drill outer 1311, a drill inner 1312 housed therein and slidably arranged vertically, and a drill inner 1312. A timing cable 1313 that expands and contracts at an arbitrary timing, a cable sleeve 1314 that slidably holds the timing cable 1313, a connecting pin 1315 that includes a connecting portion 1315a that connects the cable sleeve 1314 to a predetermined position of the drill outer 1311, In order to always apply a force in the direction in which the timing cable 1313 extends, the timing cable 1313 is composed of a compression spring 1316 disposed between the bottom surface 1312b of the elongated hole 1312a formed in the drill inner 1312 and the connecting pin 1315. In addition, a timing cable 1313 passes through an opening 1312c formed on the bottom surface of the drill inner 1312, and a stopper member 1313a having a size larger than the size of the opening 132c is fixed to the tip of the timing cable 1313.

  With the configuration shown in FIG. 19, if the timing cable 1313 is pulled at an arbitrary timing, the drill outer 1311 can be extended at the arbitrary timing. Thus, if the drill outer 1311 is extended only when digging a hole and otherwise contracted, it is possible to prevent the multi from being broken by dragging the tip of the drill body. In this case, it is preferable that the timing cable 1313 is automatically expanded and contracted in synchronization with the drilling operation.

  In each of the above embodiments, the tobacco 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 transplant machine for planting a transplant object other than the tobacco seedling. For example, the present invention can also be applied as a transplanter for a seedling using a seed pod or a planting apparatus.

  Moreover, in the said embodiment, as shown in FIG. 7, the transmission support link connection pin 617 (as a shaft center of the 1st-stage drive sprocket 251a in a side view over the operation range of the vertical movement of the drilling tool 300 ( The transmission shaft 640 is located below the first imaginary straight line including a first center line 631 that partially connects the rotation cam drive shaft 88) and the axis of the counter shaft 630, and in a side view. The first center line 631 connecting the axis of the transmission support link connecting pin 617 and the axis of the counter shaft 630, and the second center line 632 connecting the axis of the counter shaft 630 and the axis of the transmission shaft 640. The angle θ (see FIG. 7) formed is described as being the maximum when the drilling tool 300 that moves up and down along the operation locus 17 is located at or near the bottom dead center. However, the present invention is not limited to this, for example, as shown in FIG. The transmission shaft 640 is located above the first imaginary straight line 3631 partially including the first center line 631 connecting the axis of the counter shaft 630, and the transmission support link connecting pin 617 is seen in a side view. A second angle θ ′ (a first center line 631 connecting the shaft center and the shaft center of the counter shaft 630 and a second center line 632 connecting the shaft center of the counter shaft 630 and the shaft center of the transmission shaft 640 ( 20) is a configuration that becomes maximum (see θ′max in FIG. 20) when the drilling tool 300 that moves up and down along the operation locus 17 is located at or near the bottom dead center. May be. Here, FIG. 20 is a schematic left side view schematically showing a configuration of a second rotation mechanism 600 ′ as a modification of the rotation mechanism 600 described in FIG. This configuration also exhibits the same effect as the configuration described with reference to FIG. In FIG. 20, the same reference numerals are given to the same components as in FIG.

  Since the transplanter according to the present invention can reliably form a relatively deep transplant hole, the transplanter can be applied to a transplanter for planting a transplant object such as a tobacco seedling, and has high industrial applicability.

DESCRIPTION OF SYMBOLS 10 Cigarette seedling transplanter 11 Engine 12 Main transmission case 13 Front wheel 14 Rear wheel 15 Pressure wheel 16 Steering handle 17 Trajectory 18 Rolling shaft 19 Planting device 20 Traveling chain case 21 Rear frame 22 Main frame 23 Hydraulic lifting cylinder 24 Hydraulic switching valve part 25 Hydraulic cylinder for right and left tilt 80 Front swing arm 81 Left rear swing arm 82 Upper arm 83 Left lower arm 84 Swing drive cam 85 Crank arm 86 Connection arm 87 Rotating roller 88 Swing cam drive shaft 89 Crank arm drive shaft 90 Upper rear shaft 91 Lower front shaft 92 Upper shaft 93 Lower rear shaft 94 Connection support plate 95 Rotating upper shaft 96 Rotating lower shaft 97 Right lower arm 98 Left and right connecting rod 99 Right rear swing arm 300 Hole punch 400 Hopper 500 Lifting Mechanism 600 Rotation mechanism

Claims (12)

A drilling tool provided on a traveling vehicle body and forming a transplant hole for transplanting a transplant object in a field, having a conical tip and a barrel having a side that is steeper than the conical side. 300),
A drop supply tool (400) for dropping and supplying the transplant object to a transplant hole formed by the hole drill tool (300);
A vertical movement mechanism (500) for moving the punching tool (300) up and down;
A transplanting machine comprising: a turning mechanism (600) for turning the punching tool (300) about a vertical axis. A transmission section (27) for transmitting a driving force from an engine to the vertical movement mechanism (500) and the rotation mechanism (600);
The rotation mechanism (600)
An output shaft (88) provided in the left-right direction in the transmission section (27);
A transmission shaft (640) provided in the left-right direction;
An endless transmission section (651c, 652c) that transmits the driving force from the output shaft to the drilling tool (300) through the transmission shaft,
The transplanter according to claim 1, wherein the transmission shaft (640) moves up and down following the up-and-down movement of the drilling tool (300).   The transplanter according to claim 2, further comprising a pressing member (320) that presses the ground around the transplant hole formed by the drilling tool (300).   The transplanter according to claim 3, wherein the pressing member (320) is provided such that an attachment height thereof is adjustable with respect to the punching tool (300). The vertical movement mechanism (500) is configured to move the drilling tool (300) up and down along a loop-like operation locus in a side view,
The rotation mechanism (600) is an axis that converts the rotation direction of the driving force into a direction intersecting the transmission shaft (640) between the transmission shaft (640) and the drilling tool (300). The transplanter according to any one of claims 2 to 4, further comprising a direction changing unit (660). The rotation mechanism (600)
An intermediate transmission shaft (630) between the output shaft (88) and the transmission shaft (640);
A first transmission support link (610) having one end portion rotatably disposed around the output shaft (88) and the other end portion rotatably supporting the intermediate transmission shaft (630);
A second transmission support link (620) having one end portion rotatably disposed around the intermediate transmission shaft (630) and the other end portion rotatably supporting the transmission shaft (640); ,
The endless transmission (651c, 652c)
A first endless body (651c) that transmits the driving force from the output shaft (88) to the intermediate transmission shaft (630);
A second endless body (652c) that transmits the driving force from the intermediate transmission shaft (630) to the transmission shaft (640);
The transplanter according to any one of claims 2 to 5, wherein the transmission ratio of the second endless body (652c) is higher than the transmission ratio of the first endless body (651c). The rotation mechanism (600)
An intermediate transmission shaft (630) between the output shaft (88) and the transmission shaft (640);
A first transmission support link (610) having one end portion rotatably disposed around the output shaft (88) and the other end portion rotatably supporting the intermediate transmission shaft (630);
A second transmission support link (620) having one end portion rotatably disposed around the intermediate transmission shaft (630) and the other end portion rotatably supporting the transmission shaft (640); ,
The endless transmission (651c, 652c)
A first endless body (651c) that transmits the driving force from the output shaft (88) to the intermediate transmission shaft (630);
A second endless body (652c) that transmits the driving force from the intermediate transmission shaft (630) to the transmission shaft (640);
The transmission shaft (rather than a first imaginary straight line connecting the output shaft (88) and the intermediate transmission shaft (630) in a side view over the operating range of the vertical movement of the drilling tool (300). 640) is located on the upper or lower side,
Of the angle formed between the second imaginary line segment connecting the intermediate transmission shaft (630) and the transmission shaft (640) and the first imaginary straight line in a side view, the output shaft (88) and the intermediate transmission The angles (θ, θ ′) between the shaft (630) and the transmission shaft (640) are such that the drilling tool (300) is positioned at or near the bottom dead center of the operating range of the vertical movement. The transplanter according to any one of claims 2 to 5, wherein the transplanter has a maximum value.   The first transmission support link (610) or the second transmission support link (620) is disposed outside the first endless body (651c) or the second endless body (652c) with respect to the left-right direction. The transplanter according to claim 6 or 7, wherein the transplanter is configured. The vertical movement mechanism (500)
A link mechanism (80, 81, 82, 83, 97, 99) having a swing link (80, 81, 99) swinging in a predetermined direction;
A swing member (84) for operating the swing link (80, 81, 99),
The transplanter according to any one of claims 2 to 8, wherein the output shaft (88) also serves as a drive shaft (88) for rotating the rocking member (84). A guide member (900) for guiding the implant to the drop feeder (400);
The said drop supply tool (400) is comprised so that the attachment position of an up-down direction can be adjusted with respect to the said guide member (900), and the lower part is comprised so that opening and closing is possible. The transplanter according to any one of 2 to 9.   11. The opening / closing timing of the lower part of the drop supply tool (400) is configured to be adjustable with reference to the timing of moving the punching tool (300) up and down. The transplanter described. The opening / closing timing of the lower part of the drop supply tool (400) is defined to be changeable, and the drive shaft (88) for swinging the hole punch (300) or the hole punch (300) ) Provided with an opening / closing cam (740) arranged to be rotatable together with the output shaft (88) for transmitting the driving force,
The opening / closing timing of the drop supply tool (400) is adjusted by changing a mounting phase of the opening / closing cam (740) with respect to the drive shaft (88) or the output shaft (88). Item 12. The transplanter according to Item 11.

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