JP2013046582A - Planting system for transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planting system for a transplanter, designed to make a deep planting and conduct a proper transplanting operation continuously for a long time through a firm construction of its lift mechanism making a planting tool rise/fall.SOLUTION: The planting system for a transplanter is provided, which is designed to work as follows: right and left swing arm 52 and swing arm 53 are pivoted by the right and left sides of a support plate 72 supporting a planting tool 28 to be able to open and close, respectively, and the respective front ends of the right and left swing arm 52 and swing arm 53 are pivotably linked respectively to right and left crank arm 58 and crank arm 50 subject to crank turning, thereby swinging the planting tool 28 back and forth, while the longitudinal midway point(s) of one or both of the right and left swing arm 52 and swing arm 53 is(are) pivotably linked to a second lift arm 56 subject to vertical crank movement, thereby putting the planting tool 28 to vertical motion.

Description

  The present invention relates to a planting device for transplanting machines such as seedlings and seed pods, and belongs to the technical field of agricultural machinery.

  Conventionally, a transplanter is configured to transmit from a prime mover to a rear wheel, which is a traveling propulsion body, via a main transmission case, and to transmit to the planting device from the main transmission case via a planting transmission case. The planting device is configured so that the planting tool containing the transplant is moved up and down by a parallel link mechanism, and the distal end of the planting tool that moves up and down along a predetermined locus enters the field to a predetermined depth near the lowest end. Then open the planting tool and leave the transplant in the soil to plant it in the field.

Japanese Patent Laid-Open No. 10-234209

  In a conventional planting apparatus, a planting tool is pivotally supported by a horizontal support shaft at the tips of a pair of upper and lower parallel links. For this reason, the resistance that inserts the planting tool into the soil makes it impossible for the parallel link and the mounting part of the planting tool to enter, and the mounting part between the parallel link of the planting tool causes backlash. Planting operation cannot be performed.

  It is an object of the present invention to provide a transplanting device for a transplanter capable of deeply planting or performing an appropriate transplanting operation for a long time by making a lifting mechanism for lifting and lowering a planting tool strong. To do.

In order to solve the above problems, the following technical measures were taken.
That is, in the invention according to claim 1, the right swing arm 52 and the left swing arm 53 are pivotally supported on the left and right sides of the support plate 72 that supports the planting tool 28 so as to be openable and closable. The front end of the arm 53 is pivotally connected to the right crank arm 58 and the left crank arm 50 that rotate the crank, respectively, and the planting tool 28 is swung back and forth, so that one or both of the right swing arm 52 and the left swing arm 53 are front and back. The transplanting device of the transplanting machine is configured such that the middle part is pivotally connected to the second lifting and lowering arm 56 that performs a crank motion up and down to raise and lower the planting tool 28.

  In this configuration, the left and right sides of the support plate 72 that supports the planting tool 28 are supported by the right swing arm 52 and the left swing arm 53, and the planting tool 28 is rotated by the crank rotation of the right crank arm 58 and the left crank arm 50. Swings back and forth, and the second elevating arm 56 moves up and down the support plate 72 by the up and down crank motion, so that the planting tool 28 moves up and down.

  Since the support plate 72 of the planting tool 28 is supported by the right swing arm 52 and the left swing arm 53 with a lateral width, it is firmly supported even if an external force is applied to the planting tool 28 from the lateral direction. And no madness will occur.

  In the invention according to claim 2, the front ends of the right swing arm 52 and the left swing arm 53 pivotally supported on the left and right side portions of the support plate 72 that supports the planting tool 28 so as to be openable and closable are connected to the left of the planting device drive case 27. The swing drive shaft 62 and the right swing arm drive shaft 61 are connected to the left crank arm 50 and the right crank arm 58, respectively, and the front and rear intermediate portions of the left swing arm 53 are first connected to the lift drive shaft 61 of the planting device drive case 27. A transplanting device for a transplanter in which the lifting arm 55 and the second lifting arm 56 are pivotally connected to each other is used.

  In this configuration, in addition to the operation of the invention described in claim 1, the left and right side portions of the support plate 72 that supports the planting tool 28 are supported by the right swing arm 52 and the left swing arm 53, and the left swing drive shaft 62. The rotation of the right swing arm drive shaft 61 causes the planting tool 28 to swing back and forth, and the rotation of the right swing arm drive shaft 61 causes the first swing arm 55 and the second lift arm 56 to move the left swing arm 53 up and down. The planting tool 28 moves up and down.

  The invention according to claim 3 is characterized in that the lengths of the left crank arm 50 and the right crank arm 58 are the same, and the transplanting device of the transplanter according to any one of claims 1 and 2 It was.

  With this configuration, in addition to the effects of the first and second aspects of the invention, the posture of the support plate 72 that supports the planting tool 28 does not tilt even if the planting tool 28 swings back and forth and moves up and down. The planting operation is performed while maintaining the substantially vertical posture of the planting tool 28.

The invention according to claim 4 is characterized in that the elevating drive shaft 61 is coaxial with the right swing arm drive shaft 61, and the transplanting device for a transplanter according to any one of claims 1 to 3, did.
With this configuration, in addition to the effects of the inventions according to claims 1 to 3, there is no need for a new rotation output shaft of the planting device drive case 27 as a lifting drive shaft for raising and lowering the planting tool 28. Two drive shafts, that is, the swing arm drive shaft 61 and the left swing drive shaft 62 may be used, and the internal structure of the planting device drive case 27 is simplified.

  The invention according to claim 5 is characterized in that the first elevating arm 55 fixed to the elevating drive shaft 61 is longer than the left crank arm 50 and the right crank arm 58. The transplanter described in the section.

  With this configuration, the planting locus 17 of the planting tool 28 has a wider up-and-down movement width than the front-back swinging width, so that the transplant can be planted deeply.

  6. The invention according to any one of claims 1 to 5, wherein the planting tool 28 is supported by a strong lifting mechanism, and the problem of the invention is appropriately solved particularly against an external force from the left-right direction. can do.

It is a side view which shows a transplant machine. It is a top view which shows a transplant machine. It is a bottom view which shows a supply part. It is a side view which shows a planting transmission case. It is a side view which shows a planting apparatus drive case. It is a cross-sectional expansion | deployment top view which shows a planting transmission case. It is an enlarged plan view of a planting clutch. It is an expansion side view for an operation explanation of a planting clutch. It is an expansion side view for an operation explanation of a planting clutch. It is a perspective view which shows a planting apparatus. It is a partial expanded side view which shows the raising / lowering mechanism of a planting tool. It is a partial enlarged plan view which shows the raising / lowering mechanism of a planting tool. It is an enlarged rear view which shows a planting apparatus. It is a graph which shows the up-down moving speed of the planting tool, the back-and-forth moving speed, and the absolute speed. It is a graph which shows the static locus | trajectory and dynamic locus | trajectory of the planting tool for every planting stock. (A) An enlarged plan view for explaining the operation of the guide roller operating part, (b) An enlarged side view for explaining the action of the guide roller operating part. It is a partial expanded side view which shows the raising / lowering mechanism of the planting tool of another Example. Furthermore, it is the elements on larger scale which show the raising / lowering mechanism of the planting tool of another Example.

One embodiment of the present invention will be described below. The following embodiment is merely an embodiment, and does not restrict the interpretation of the scope of claims.
A transplanter for transplanting tobacco seedlings will be described as an example of a transplanter.

  As shown in FIGS. 1 and 2, the transplanter 10 includes a motor 11 and a main transmission case 12 that are engines at the front, a pair of left and right front wheels 13 as traveling wheels, and a pair of left and right rear wheels as traveling propulsion bodies. 14, and a planting device 19, a supply unit 31, a pressure reducing wheel 15, and a steering handle 16 at the rear.

  The transplanter 10 has the left and right front wheels 13 and the left and right rear wheels 14 traveling between the ridges so that the traveling machine body straddles the ridge U in the field. It is the composition to plant.

  In addition, left and right extension cases 40 are provided on the left and right ends of the main transmission case 12 so as to be vertically rotatable with respect to the main transmission case 12, and the traveling transmission cases 20 are attached to the respective ends of the left and right extension cases 40. ing. Therefore, the power in the main transmission case 12 input from the prime mover 11 is transmitted to the traveling transmission case 20.

  Left and right rear wheels 14 are respectively attached to the rotating front end portions of the left and right traveling transmission case 20, and the body is driven by driving the left and right rear wheels 14. Accordingly, the main transmission case 12, the left and right extension case 40, and the left and right traveling transmission case 20 are transmission devices that transmit driving force to the left and right rear wheels 14 as driving traveling wheels.

  On the other hand, a front wheel support frame 41 extending in the left-right direction is provided below the engine mounting table 91 so as to be rotatable about the rolling shaft 18 in the front-rear direction, and the left and right front wheels 13 are attached to both left and right ends of the front wheel support frame 41. It is said.

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

  A hydraulic lifting cylinder 23 is provided on the rear side of the main transmission case 12 and in the center in the left-right direction. The hydraulic lift cylinder 23 is fixedly provided on a hydraulic switching valve portion 24 attached to the main transmission case 12, and switches an oil path from a hydraulic pump 92 attached to the main transmission case 12 by the hydraulic switching valve portion 24. It works by.

  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 respectively serve as 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 arms 40a attached to the respective extension cases 40, so that the horizontal rod 43 and the extension case are connected. 40 is connected. Therefore, the traveling transmission case 20 is rotated around the left and right output shafts of the main transmission case 12 via the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 by the expansion and contraction of the hydraulic lifting cylinder 23. The rear wheel 14 is moved up and down by the rotation of the traveling transmission 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 of the machine body, depending on the advanced 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 immediately below the position where the planting tool 28 of the planting device 19 plantes seedlings on the cocoon U at a position below the center of the machine body, the height of the top surface of the cocoon U comes into contact with a known cocoon U top surface. A planting depth control sensor S for detecting the planting depth control sensor S is provided, and a hydraulic lifting / lowering cylinder 23 is provided via a lifting / lowering control switching valve provided in the hydraulic switching valve unit 24 by detecting 畝 U of the planting depth control sensor S. The left and right rear wheels 14 are controlled to move up and down to control the traveling machine body to a predetermined height with respect to the heel U so that the depth at which the planting tool 28 plants the seedling on the heel U is constant. .

  Further, a left / right tilt hydraulic cylinder 25 that is actuated by hydraulic pressure from a hydraulic pump 92 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. A structure in which 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 of the hydraulic cylinder 25 to control the traveling vehicle body to a desired right and left inclined posture regardless of the unevenness of the valley portion of the heel U It has become. A pendulum type left / right tilt sensor 42 is provided on the right side of the main transmission case 12, and the left / right tilt sensor 42 detects the left / right tilt via a left / right tilt switching valve provided in the hydraulic pressure switching valve unit 24. The hydraulic cylinder 25 is actuated to control the traveling machine body to a desired left / right inclined posture.

  The planting device 19 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 to be transplanted one by one on the straw in the field, It is transmitted through a planting device drive case 27 attached to the planting transmission case 26 and is operated.

  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. The tip (lower end) of the planting tool 28 moves down the front side and rises on the rear side by the lifting and lowering operation of the planting tool 28, and has a loop-like locus 17 in which the width in the front-rear direction is larger in the lower part than in the upper part. It draws and operates repeatedly.

  A supply cup 33 that is operated by the power from the planting transmission case 26 and is supplied by the operator by hand to the seedling one by one is supplied to the supply unit 31 in a circular loop on the supply turntable 32 at predetermined intervals. Is arranged. As shown in FIG. 3, an opening / closing lid 34 that is movable in the vertical direction is provided at the bottom of each supply cup 33. Further, below the supply cup 33, the opening / closing lid 34 is provided only when the supply cup 33 comes to a predetermined position P, which is the position above the planting tool 28, due to the rotation of the supply turntable 32 in the direction of arrow A. In order to open, a substantially C-shaped supply cup opening / closing guide 35 in which a part of the annular body is 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.

The worker who walks with the traveling of the machine body takes the seedlings on the mounting table 30 and puts them in the supply cups 33 rotating in the direction of arrow A in accordance with the traveling of the machine body.
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 is supplied to the lower planting tool 28. When the planting tool 28 comes to the bottom dead center of the operation locus 17, the planting tool 28 enters the soil to a predetermined depth and opens to the left and right like a cocoon so as to drop and plant the seedling held inside.

A power take-out shaft that protrudes rearward from the rear surface of the main transmission case 12 protrudes, and power is input into the planting transmission case 26 via the power take-out shaft.
The transmission in the planting transmission case 26 will be described with reference to FIG. 6. An input shaft 93 is provided in the front-rear direction that rotates coaxially with the power take-off shaft, and a pair of bevel gears 94 a and 94 b are provided from the input shaft 93. It is transmitted to the first shaft 95 in the left-right direction. A safety clutch 96 is provided on the input shaft 93 just before the planting transmission case 26 to cut off the power with a load torque higher than a predetermined value. When an excessive operating load is generated on the planting device 19 due to a mechanical lock or the like. Further, the power is cut off by the safety clutch 96 to prevent the planting transmission mechanism including the planting device 19 and the planting transmission case 26 from being damaged.

  A first drive sprocket 97 that rotates integrally with the first shaft 95 is provided on the first shaft 95, and is transmitted from the first drive sprocket 97 to the first driven sprocket 99 via the first endless body 98 that is a transmission chain, It is transmitted to the second shaft 100 in the left-right direction that rotates integrally with the first driven sprocket 99. Three drive side gears 101a, 101b, and 101c are arranged on the left and right sides (left side) of the first driven sprocket 99 on the second shaft 100, and the three drive side gears 101a, 101b, 101c rotates integrally with the second shaft 100. The plurality of drive side gears 101a, 101b, and 101c have different pitch circle diameters and are set to have different numbers of teeth.

  A single driven gear 102 that meshes with any one of the plurality of drive side gears 101 a, 101 b, and 101 c is provided on the third shaft 103 in the left-right direction, and the driven gear 102 is moved left and right on the third shaft 103. The driven gear 102 can be switched so as to mesh with any one of the three driving gears 101a, 101b, and 101c. The third shaft 103 is configured to rotate integrally with the driven gear 102 via a spline 104 formed on the shaft surface.

  The driven side gear 102 is slid by the left and right slide of the selection mechanism 105 which is a slide shifter linked to the driven side gear 102. The selection mechanism 105 includes a linkage portion 106 that is linked to the driven gear 102 and a slide shaft 107 that is integral with the linkage portion 106 and extends in the left-right direction. The end portion of the slide shaft 107 is the other left and right sides of the planting transmission case 26. The switching operation grip 108 is fixed to the end of the slide shaft 107. Therefore, when the operator operates the switching operation grip 108 to the left and right, the selection mechanism 105 moves to the left and right to switch the left and right positions of the linkage unit 106, and the transmission ratio to the third shaft 103 is switched. The transmission ratio switching configuration by the selection mechanism 105 is an inter-strain transmission that changes the operating speed of the planting device 19 with respect to the traveling speed to change the planting strain. The slide shaft 107 is disposed on the rear side of the front end of the third shaft 103 above the third shaft 103, and the selection mechanism 105 including the linkage portion 106 is located above the third shaft 103 and more than the third shaft 103. Located on the back side.

  A second drive sprocket 109 that rotates integrally with the third shaft 103 is provided at the left and right ends (left side) of the third shaft 103, and a second endless body 110 that is a transmission chain extends from the second drive sprocket 109. To the second driven sprocket 111. The second driven sprocket 111 is configured to rotate freely on the left swing drive shaft 62 that is the fourth axis in the left-right direction, and is driven as a driving body of the planting clutch 112 provided on the left swing drive shaft 62. It rotates integrally with the side nail body 113.

  The planting clutch 112 is a fixed position stop clutch that stops at a predetermined rotation phase (fixed position) when the transmission is cut off, and exceeds the top dead center on the locus 17 that operates the planting tool 28 of the planting device 19. Stop at a slightly lowered position. The planting clutch 112 is disposed on the left and right other side (right side) of the second driven sprocket 111, and the driven claw body 114 as a driven body that meshes with the driving side claw body 113 rotates integrally with the left swing drive shaft 62. It is configured to move left and right in the direction, and the transmission to the left swing drive shaft 62 is turned on and off. The driving claw body 113 and the driven claw body 114 are provided with four engaging claws 113a and four engaging claws 114a, respectively, which mesh with each other.

  That is, the driven claw body 114 is attached to the left swing drive shaft 62 so as to be movable in the left-right direction in the axial direction. A shaft groove 114 ′ provided in the central portion of the driven claw body 114 is provided with a key groove 114 b penetrating in the axial direction, and the key groove 114 b is fitted to a key 62 a provided on the left swing drive shaft 62. It has a configuration. Accordingly, the driven claw body 114 is configured to rotate integrally with the left swing drive shaft 62 and to be mounted on the left swing drive shaft 62 so as to be movable left and right in the axial direction.

  Then, on the outer peripheral surface of the driven claw body 114 of the planting clutch 112, the driven claw body 114 is separated from the driving claw body 113, the planting clutch 112 is disconnected, and the planting tool 28 of the planting device 19 is attached to the above. An operation cam 115 for stopping at a fixed position is formed. The operation cam 115 is in a direction in which the driven claw body 114 is separated from the drive claw body 113 when an operation pin 116a as a contact body described later contacts and the left swing drive shaft 62 rotates in the direction of arrow A. And the operation pin 116a comes into contact with the inclined surface 115a that cuts off the planting clutch 112 and the driven claw body 114 is separated from the driving claw body 113 and the planting clutch 112 is disengaged. And the abutment surface 115b for stopping the planting tool 28 of the planting device 19 at the above-mentioned fixed position.

  The timing at which the driven claw body 114 is separated from the driving claw body 113 and the planting clutch 112 is disengaged is set to a position where the planting tool 28 is slightly past the highest rising position of the locus 17 by the lift link mechanism 29. When you come. Therefore, the planting clutch 112 is surely cut off by the inertial force that attempts to move the planting tool 28 slightly past the highest position. Then, after the planting clutch 112 is surely disconnected, the inertial force to move down the planting tool 28 urges the inclined surface 115a with which the operation pin 116a is in contact with the driven claw body 114. The operation pin 116a comes into contact with the contact surface 115b and stops the planting tool 28 properly at a fixed position.

  Further, the planting clutch operating mechanism 116 provided with the operation pin 116a facing the operation cam 115 at the tip protrudes to the operation cam 115 side (front side), and the operation pin 116a contacts the operation cam 115. In this way, the transmission of the planting clutch 112 is cut off. Conversely, when the planting clutch operation mechanism 116 returns to the opposite side (rear side) to the operation cam 115 and is separated from the operation cam 115, the planting clutch 114 presses the driven claw body 114 to the drive claw body 113 side (left side). By the clutch spring 117, the driving side claw body 113 and the driven side claw body 114 mesh with each other, and the planting clutch 112 is in a transmission state.

  At this time, the driven claw body 114 is provided with an arc-shaped convex portion 115c protruding in the outer peripheral direction from the operation cam 115 portion at a portion where the contact surface 115b of the end portion of the operation cam 115 is provided. The arc-shaped convex portion 115c is a rear corner portion in the direction in which the driven claw body 114 of the contact surface 115b is urged by the planting clutch spring 117 (the direction in which the planting clutch 112 is engaged). Is cut obliquely to form a contact guide guiding slope 115d.

  Therefore, when the transmission of the planting clutch 112 is turned on, the operation pin 116a is moved in a direction away from the operation cam 115, and the operation pin 116a is a contact body guide slope of the arc-shaped convex portion 115c of the contact surface 115b. When moved to 115d, the operation pin 116a moves so as to slide on the contact guide guiding slope 115d, the driven claw body 114 is urged by the planting clutch spring 117, and the driven claw body 114 is driven to the driving claw body 113. Therefore, the planting clutch 112 enters the transmission state accurately and quickly. Therefore, the timing at which the operation pin 116a moves away from the contact surface 115b and the planting tool 28 descends by the elevating link mechanism 29 is almost the same as the drive timing by the transmission of the planting clutch 112, and the planting tool 28 is properly The elevator link mechanism 29 is driven.

  In the state where the driven claw body 114 is engaged with the driving claw body 113 and the planting clutch 112 is engaged, the operation pin 116a faces the side surface 115e opposite to the driven claw body 114 of the convex portion 115c. And the operation pin 116a does not hinder the rotation of the driven claw body 114.

  Of course, the arc-shaped convex portion 115c has an operation pin until the planting tool 28 starts to descend by the lifting link mechanism 29 until the planting tool 28 enters the upper surface of the cocoon U and finishes planting the seedling into the cocoon U. It is in a position facing 116a. Therefore, even if the driving load is applied to the left swing drive shaft 62 due to the planting load when the planting tool 28 enters the top surface of the cocoon U and the seedling is planted in the cocoon U, the operation pin 116a is formed of the arc-shaped convex portion 115c. Since the operation pin 116a is in contact with the side surface 115e of the arc-shaped convex portion 115c because the position is opposite to the side surface 115e, the driven claw body 114 is prevented from being separated from the driving side claw body 113, and planting is performed. The transmission of the clutch 112 can be prevented from being cut off, and an appropriate seedling transplanting operation can be performed.

  The planting clutch operation mechanism 116 is disposed behind the left swing drive shaft 62 and behind the left swing drive shaft 62. Then, when the operator operates the planting clutch lever 150 provided at the left and right intermediate position of the steering handle 16 toward the rear of the aircraft in the planting clutch disengagement direction, the operation pin 116a of the planting clutch operation mechanism 116 is moved to the operation cam 115 side ( By projecting to the front side and the operation pin 116a coming into contact with the operation cam 115, the transmission of the planting clutch 112 is cut off as described above. On the contrary, when the operator operates the planting clutch lever 150 in the planting clutch engagement direction, the operation pin 116a of the planting clutch operation mechanism 116 returns to the opposite side (rear side) to the operation cam 115 and is separated from the operation cam 115. The planting clutch spring 117 engages the driving claw body 113 and the driven claw body 114 so that the planting clutch 112 is in a transmission state.

  The left and right ends (left side) of the left swing drive shaft 62 protrude from the planting transmission case 26, and are attached to the left and right side (left side) side surfaces of the planting transmission case 26. 27, and further protrudes from the left and right side surfaces (left side) of the planting device drive case 27.

  A third drive sprocket 118 that rotates integrally with the left swing drive shaft 62 is provided in the planting device drive case 27, and is transmitted from the third drive sprocket 118 to the third driven sprocket 120 via the third endless body 119 that is a chain. Then, the third driven sprocket 120 and a right swing arm drive shaft 61 described later rotate integrally. The right swing arm drive shaft 61 is disposed behind the left swing drive shaft 62 at a position slightly higher than the left swing drive shaft 62. In addition, a leaf spring 121 is provided above the third endless body 119 to contact the third endless body 119 and apply tension to the third endless body 119.

  On the other hand, a pair of bevel gears 121a and 121b for supplying part transmission are provided on the left and right other side (right side) ends of the left swing drive shaft 62, and the pair of bevel gears 121a and 121b for supplying part transmission are provided. The planting transmission case 26 is configured to be transmitted to the power take-out shaft 122 for supply portion projecting to the rear side. The supply unit 31 is driven and rotated by transmission from the power supply shaft 122 for supply unit.

The arrangement configuration of the transmission shaft in the planting transmission case 26 will be described. The second shaft 100 is arranged on the rear side and the upper side with respect to the first shaft 95, and the rear side of the second shaft 100 (substantially the same height as the second shaft 100). The third shaft 103 is disposed at a position above the third shaft 103, and the left swing drive shaft 62 is disposed above the third shaft 103 (substantially the same longitudinal position as the third shaft 103). In the planting transmission case 26, a recess 123 is formed between the second shaft 100 and the left swing drive shaft 62 on the diagonally front upper side of the third shaft 103 and on the front upper surface of the planting transmission case 26. (See Figure 4)
A machine body cover 124 is provided to cover the prime mover 11 and the main transmission case 12, and a rear part 124 a of the machine body cover 124 is disposed so as to protrude into the recess 123 of the planting transmission case 26. The body cover 124 is formed with an extension portion 124b extending to the rear side of the recessed portion 123 of the planting transmission case 26 on the left and right side (left side) of the planting transmission case 26, and the extension portion 124b is moved up and down the link mechanism 29. Is disposed above the front portion (left crank arm 50 and rear swing arm 51 described later). (See Figure 1)
The planting device 19 includes a cup-shaped planting tool 28 that receives a seedling from an opening formed in the upper part and has a pointed tip that can be opened and closed to the left and right, and an elevating link mechanism 29 that drives the planting tool 28 up and down. The

  The lifting / lowering link mechanism 29, which is a link mechanism, includes a right swing arm 52 pivotally supported by a right rotation shaft 73 protruding from the right rear side of the support plate 72 of the planting tool 28, and a right swing arm of the planting device drive case 27. The left end of the right crank arm 58 fixed to the right protruding end of the drive shaft 61 is connected to the left connecting shaft 59 by the right connecting shaft 59 and pivotally supported on the left rotating shaft 74 protruding from the left front side surface of the support plate 72 of the planting tool 28. The front end of the swing arm 53 is connected to the tip of the left crank arm 50 fixed to the left swing drive shaft 62 of the planting device drive case 27 by the left connecting shaft 65 and fixed to the left protruding end of the right swing arm drive shaft 61. The second elevating arm 56 is connected to the tip of the first elevating arm 55 by the first connecting shaft 66, and the second elevating arm 56 is connected to the lower bent portion at the middle portion of the left swing arm 53 and the second connecting shaft. Pivoted at 67

  Next, by the operation of the elevating link mechanism 29, the lower end of the planting tool 28 draws a planting locus 17 (static trajectory: a locus in a state where the machine is stopped), and the planting device 28 transplants the seedling into the ridge U. The operation will be described.

  When the left swing drive shaft 62 rotates in the B direction, the left crank arm 50 fixed to the left swing drive shaft 62 rotates in the B direction, and the left swing arm 53 swings back and forth.

On the other hand, when the right swing arm drive shaft 61 rotates, the right crank arm 58 fixed to the right protruding end rotates in the C direction, and the right swing arm 52 swings back and forth.
Further, as the right swing arm drive shaft 61 rotates, the first lifting arm 55 fixed to the left protruding end rotates in the C direction, and the second lifting arm 56 moves up and down to move the left swing arm 53 up and down. Rocks. Since the first elevating arm 55 is longer than the left crank arm 55 and the right crank arm 58, the planting locus 17 has a larger elevating width than the front and rear swinging width.

  Therefore, since the right swing arm 52 and the left swing arm 53 are parallel link mechanisms, the support plate 72 pivotally attached to the front ends of the right swing arm 52 and the left swing arm 53, that is, the planting tool 28 is oriented in the vertical direction. The seedling received in the planting tool 28 can be planted in an appropriate posture on the cocoon by operating the plant while tracing the planting locus 17.

  In addition, the lower part of the planting tool 28 is composed of a bowl-shaped left side member 70L and a right side member 70R. The left side member 70L and the right side member 70R are closed and hold seedlings therein, and the planting locus 17 It is a general configuration in which the seedlings are planted in the buds that open to the left and right at the bottom end of the pod.

Next, an opening / closing mechanism for opening / closing the planting tool 28 and its operation will be described with reference to FIGS.
A counter arm 79 for opening and closing the planting tool 28 is rotatably provided on a rotating upper shaft 73 provided at one end (rear end) of the upper arm 52. An open / close arm 76 is rotatably provided on an upper shaft 64 provided at the other end (front end) of the upper arm 52, and the open / close arm 76 and the counter arm 79 are connected by a connecting rod 78. The counter arm 79 is provided with a pin 80. In addition, it is good also as a structure which can adjust the rod length of the connection rod 78 with adjustment screws, such as a turnbuckle.

  In addition, an opening / closing driving cam 75 fixed to the left swing driving shaft 62 and rotating together with the swing driving cam 54 is provided, and an opening / closing roller 77 that contacts the peripheral edge of the opening / closing driving cam 75 is rotated to the opening / closing arm 76. It is provided freely. The open / close drive cam 75 rotates with the rotation of the left swing drive shaft 62, thereby operating the open / close arm 76 via the open / close roller 77.

  In the opening / closing operation of the planting tool 28, the counter arm 79 operates in parallel with the opening / closing arm 76 via the connecting rod 78, and the opening / closing arm 76 is operated by the opening / closing driving cam 75 via the opening / closing roller 77. Therefore, the opening / closing timing and the opening / closing amount can be set with high accuracy by the opening / closing driving cam 75 having a simple shape.

  The holder 71 provided in the planting tool 28 is composed of a left holder 71L and a right holder 71R, the left holder 71L is integrally fixed to the left member 70L, and the right holder 71R is integrally fixed to the right member 70R. The left holder 71L rotates around the left fulcrum shaft 125 in the front-rear direction, and the right holder 71R rotates around the right fulcrum shaft 126 in the front-rear direction. The left holder 71L and the right holder 71R are connected by a shaft 127 for use. In addition, an open / close rod 131 extending in the vertical direction is connected to a rotation operation arm 128 provided integrally with the left holder 71L, and a pin 80 of the counter arm 79 is connected to the open / close rod 131. An opening / closing spring 130 is provided between the left holder 71L and the right holder 71R, and the left member 70L and the right member 70R are pressed inward in the left-right direction by the spring force of the opening / closing spring 130, and planting is performed. The lower part of the tool 28 is closed. In addition, the opening / closing roller 77 and thus the opening / closing arm 76 are pressed against the opening / closing drive cam 75 side (upper side) by the spring force of the opening / closing spring 130.

  When the open / close drive cam 75 rotates with the rotation of the left swing drive shaft 62, the open / close roller 77 moves according to the peripheral shape of the open / close drive cam 75, and the open / close arm 76 swings. As the opening / closing arm 76 swings, the connecting rod 78 operates in the front-rear direction, the counter arm 79 rotates, the opening / closing rod 131 operates in the up-down direction, and the left holder 71L is moved via the rotation operation arm 128. While rotating, the right holder 71R is rotated via the interlocking shaft 127, and the left holder 71L and the right holder 71R are turned against each other to the left and right symmetrical positions to open and close the lower portion of the planting tool 28. Specifically, the open / close rod 131 is actuated upward in accordance with the forward actuation of the connecting rod 78 to open the lower part of the planting tool 28. When the planting tool 28 is raised, the lower portion of the planting tool 28 is temporarily largely opened by a local protrusion on the outer periphery of the opening / closing drive cam 75, and a separate scraper for cleaning is provided. It is set as the structure which can pass the inside up and down.

  As a result, the lower part of the planting tool 28 is closed in the process of descending from the vicinity of the top dead center of the locus 17, the lower part of the planting tool 28 is opened at the bottom dead center, and the process of ascending from the bottom dead center. The lower part of the attachment 28 will be in the open state.

The opening / closing drive cam 75 may be fixed to a crank arm drive shaft 69 that drives the crank arm 55 and rotated integrally with the crank arm 55.
In the present embodiment, since the open / close arm 76 is attached to the upper shaft 64 that is the connecting fulcrum shaft of the upper arm 52, the configuration is simple. In addition, since both the open / close arm 76 and the counter arm 79 are connected to the rotation fulcrum shaft of the upper arm 52, the connecting rod 78 is disposed along the upper arm 52, thereby forming a compact configuration. In addition, since the opening / closing drive cam 75 is attached to the left swing drive shaft 62 which is the rotation fulcrum shaft of the left crank arm 50 together with the swing drive cam 54, the structure is simple.

  The absolute speed obtained by combining the vertical movement speed in the vertical direction and the longitudinal movement speed in the front-rear direction 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. In addition, in the vicinity of the top dead center, the time for the longitudinal movement speed in the longitudinal direction to be 10 mm / s or less was 0.21 seconds, and it was confirmed that it was the time that the seedling could be reliably supplied from the supply cup 33. Thereby, the conventional intermittent planting mechanism can be made unnecessary.

  In addition, the movement trajectory taking into account the traveling of the aircraft is 50 cm between stocks, the front and back width 75 mm above the bottom dead center assuming the soil surface is 4.9 mm, and between 40 cm and 60 cm between stocks, 19.1 mm and It was 20.2 mm, and it was confirmed that planting holes were not so large in actual planting and could be planted without problems.

  Therefore, since the moving speed at the top dead center of the planting tool 28 can be reduced (stop time is increased), the transmission to the planting tool 28 is stopped at the top dead center as in the prior art, and the planting tool 28 is Even if an intermittent planting mechanism that operates intermittently is not provided, planting can be performed with an appropriate movement trajectory between various strains only by changing the transmission ratio to the planting tool 28.

  As described above, the transplanter 10 is configured to transmit from the prime mover 11 to the traveling propulsion body via the main transmission case 12 and to transmit to the planting device 19 from the main transmission case 12 via the planting transmission case 26. The planting transmission case 26 is arranged on the rear side of the main transmission case 12 and is formed by forming a recess 123 on the upper surface of the front side to cover the prime mover 11 and the upper part of the main transmission case 12. The rear portion 124 a is inserted into the concave portion 123.

  Therefore, since the rear part 124a of the machine body cover 124 can be inserted into the recess 123 of the planting transmission case 26 and positioned rearward, the front and rear length of the machine body can be shortened to make the machine body compact, and the machine body cover 124 can be configured. Thus, the structure of the airframe including the front lower portion of the planting transmission case 26 can be effectively covered, and the structure of the airframe can be accurately shielded from rain and the like, so that the durability of the airframe is improved.

  The planting device 19 includes a planting tool 28 and a lifting link mechanism 29 that lifts and lowers the planting tool 28, and the lifting link mechanism 29 is disposed on one side of the planting transmission case 26, 124 is formed with an extension portion 124b extending rearwardly of the recessed portion 123 of the planting transmission case 26 on the left and right sides of the planting transmission case 26, and the extension portion 124b is disposed above the lifting link mechanism 29. is doing.

  Therefore, the extension of the body cover 124 can effectively cover the structure of the body including the lifting link mechanism 29, and can accurately block the structure of the body including the lifting link mechanism 29 from rain or the like. , Durability of the aircraft is improved. In addition, the operator can be prevented from touching the lift link mechanism 29 that operates, and safety is improved.

Next, a saddle guide mechanism 160 that causes the vehicle to travel along the saddle U will be described with reference to FIGS.
A seedling is transplanted by planting seedlings with the planting tool 28 on the heel U running across the left and right front wheels 13 and the left and right rear wheels 14, and the heel guide mechanism 160 is provided at the front of the machine body. The left and right guide rollers 161 are in contact with the left and right surfaces of the, respectively, and guide the aircraft to travel along the kite U.

  The left and right guide rollers 161 are provided on the left and right sides of the engine mounting table 91 respectively. However, since the left and right guide rollers 161 have the same configuration, the left guide roller 161 will be described below as a representative.

  A base portion of a guide roller support pin 162 is fixed to the side surface of the engine mounting table 91 by welding. The guide roller support pin 162 is provided so as to be inclined downward so that the tip thereof is positioned downward as it goes outward.

  A cylindrical boss 164 provided at the base portion of the guide roller support arm 163 is rotatably fitted around the guide roller support pin 162, and a cylindrical support boss 165 provided at the front end portion of the guide roller support arm 163 is attached to the guide roller support pin 162. Is provided with a roller shaft 167 provided with a resin-made cylindrical roller 166 so as to be rotatable, and is fixed by bolts 168 through a vertically adjustable position.

  Further, a rising operation arm 169 provided upward on the cylindrical boss 164 and an upper arm 40a for raising and lowering the rear wheel 14 by the operation of the hydraulic lifting cylinder 23 are connected by a connecting wire 170, and a normal operation is performed. In the vertical operation of the rear wheel 14 at the time of planting work, the ascending operation arm 169 does not operate due to the looseness of the connecting wire 170, and when the rear wheel 14 is lowered to the maximum limit when turning the aircraft, the connecting wire 170 The guide roller 161 is retracted upward away from the flange U by loosening and rotating the lifting operation arm 169 backward.

  At this time, the guide roller support pin 162 that rotatably supports the cylindrical boss 164 provided at the base portion of the guide roller support arm 163 is inclined downward so that the tip thereof is positioned downward as it goes outward. Therefore, the left and right guide rollers 162 are lifted in the direction of opening apart from each other, and are lifted well without contacting the heel U surface. Therefore, when the planting clutch lever 150 is operated in the planting clutch disengagement direction, and the left and right rear wheels 14 are lowered to the maximum limit to raise the machine body and turn the machine body, the left and right guide rollers 162 are simultaneously separated from each other. It can be lifted well without touching the heel U surface in the opening direction, and the turning operation of the aircraft can be performed easily and appropriately.

  Further, a wave-shaped unevenness 164 a is formed on the outer side of the cylindrical boss 164, and on the inner side of a fixing boss 171 provided on the outer side of the cylindrical boss 164 so as to be rotatably fitted on a guide roller support pin 162. It is configured to engage with the provided wave-shaped unevenness 171a.

  The cylindrical boss 164 is biased by the biasing spring 172 toward the fixing boss 171, and the wave-shaped unevenness 164 a outside the cylindrical boss 164 engages with the wave-shaped unevenness 171 a inside the fixing boss 171. By doing so, the left and right guide rollers 161 are fixed at the position of the airframe traveling direction guide acting on the flange U and the position retracted upward.

  In order to prevent the left and right guide rollers 161 from being damaged by hitting other objects, the cylindrical boss 164 is urged toward the fixing boss 171 side by the urging spring 172 as described above, so that the outer side of the cylindrical boss 164 The wave shape unevenness 164a and the wave shape unevenness 171a inside the fixing boss 171 are engaged. Therefore, when the guide roller 161 hits another object, the engagement of the wave-shaped irregularities 164a and 171a is released against the urging force of the urging spring 172, and the cylindrical boss 164 is against the fixing boss 171. Thus, the guide roller 161 escapes away from other objects and can be prevented from being damaged.

  The fixing boss 171 is provided with an operation arm 173 facing downward, and is linked to the planting clutch lever 150 by a connecting wire 174. That is, when the planting clutch lever 150 is operated to engage the planting clutch, the left and right guide rollers 161 are lowered by pulling the connecting wire 174 and come into contact with the left and right surfaces of the kite U so that the aircraft travels along the kite U. When the planting clutch lever 150 is operated to disengage the planting clutch, the connecting wire 174 is loosened and the left and right guide rollers 161 can be raised when the aircraft is turning.

FIG. 17 shows another embodiment of the lifting mechanism of the planting tool 28.
A swing is formed by pivotally supporting a pinion gear 136 on the front end of a left and right swing arm 135 pivotally supported by a pivot shaft 137 on the left and right side surfaces of the support plate 72 of the planting tool 28, and forming an arc-shaped elongated hole 139a into which the pinion gear 136 is fitted. The arm 139 is pivotally supported on the planting device drive case 27 by the swing pivot shaft 141. A rack 139b that engages with the pinion gear 136 is formed in the arc-shaped elongated hole 139a. A swing rotor 140 is pivotally supported at the upper end of the swing arm 139 and abuts on a swing cam 138 fixed to the swing drive shaft 145.

Therefore, as the swing drive shaft 145 rotates, the swing arm 139 swings back and forth, and the left and right swing arm 135 swings back and forth.
In addition, the second connecting shaft 67 is pivotally supported by the first lifting arm 55, the first connecting shaft 66, and the second lifting arm 56 fixed to the lifting drive shaft 146 at the front and rear intermediate portion of the left and right swing arm 135, and the lifting drive is performed. The left and right swing arm 135 is moved up and down by the rotation of the shaft 146.

The raising / lowering mechanism of the planting tool 28 can arbitrarily change the planting locus depending on the shape of the swing cam 138.
FIG. 18 shows another embodiment of the lifting mechanism of the planting tool 28.

  A cam roller 144 is pivotally supported at the front end of the left and right swing arm 135, and a first swing cam 142a fixed to the first swing drive shaft 142 and a second swing cam 143a fixed to the second swing drive shaft 143 are provided. The cam roller 144 is pulled by a tension spring 147 so as to come into contact.

  The cam roller 144 can be brought into contact with the first rocking cam 142a and the second rocking cam 143a by a tension spring 147 from above, and in this case, the planting tool 28 is moved during the planting operation. When hitting a stone or the like, the planting tool 28 can be prevented from being forced into the ground.

  The transplanting machine according to the present invention can be applied to a transplanting machine for planting various transplanted objects such as seedlings such as various vegetable seedlings and potatoes and bulbs such as raccoon in addition to tobacco seedlings, and has industrial applicability. high.

28 Planting tool 50 Front swing arm 52 Right arm 53 Left arm 55 Left crank arm 56 Connection arm 58 Right crank arm 61 Crank arm drive shaft (lifting drive shaft)
62 Oscillating cam drive shaft 72 Support plate

Claims (5)

  A right swing arm (52) and a left swing arm (53) are pivotally supported on the left and right sides of a support plate (72) that supports the planting tool (28) so that it can be opened and closed, and the right swing arm (52) and the left swing are supported. The front end of the arm (53) is pivotally connected to the right crank arm (58) and the left crank arm (50) that rotate the crank, respectively, and the planting tool (28) is swung back and forth, and the right swing arm (52) Implanting a transplanting machine in which one or both of the left and right swing arms (53) are pivotally connected to a second lifting arm (56) that cranks up and down to raise and lower a planting tool (28). apparatus.   The front end of the right swing arm (52) and the left swing arm (53) pivotally supported on the left and right sides of the support plate (72) that supports the planting tool (28) so that it can be opened and closed is attached to the planting device drive case (27). The left swing arm (62) and the right swing arm drive shaft (61) are connected to the left crank arm (50) and the right crank arm (58), respectively, and the front and rear intermediate portions of the left swing arm (53) are planted. A transplanting device for a transplanter, which is pivotally connected to a lift drive shaft (61) of a device drive case (27) by a first lift arm (55) and a second lift arm (56).   The transplanting device for a transplanter according to claim 1 or 2, wherein the left crank arm (50) and the right crank arm (58) have the same length.   The transplanting device for a transplanter according to any one of claims 1 to 3, wherein the elevating drive shaft (61) is coaxial with the right swing arm drive shaft (61).   The first elevating arm (55) fixed to the elevating drive shaft (61) is longer than the left crank arm (50) or the right crank arm (58), according to any one of claims 1 to 4. The transplanter according to item.

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