JP2014158452A - Press wheel support constitution of transplanting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce production costs by simplifying a press wheel support constitution of a transplanting machine by sharing a part of a stand for supporting a machine body with a press wheel support part for attaching a press wheel to the machine body to reduce constituent members.SOLUTION: In a press wheel support constitution of a transplanting machine, a stand arm 140 whose state is switched between a machine body support state for grounding to the ground and a non-use state of being separated far from the ground is supported so as to be held in an intermediate position of being slightly floated from the ground, and a grounding wheel arm 146 pivotally supporting a press wheel 15 is provided in a tip grounding part 152 of the stand arm 140 in a state of being urged downward.

Description

  The present invention relates to a pressure-reducing wheel of a transplanter equipped with a seedling planting device on a traveling vehicle body and covering the former site where seedlings and seeds such as onions, lettuce, tobacco, etc. were planted with a planting device, and lightly treading the ground. The present invention relates to a structure for supporting a pressure-reducing wheel on a traveling vehicle body.

As a prior art of the support structure of the pressure-reducing wheel provided in a transplanter, there exists a structure as described in Unexamined-Japanese-Patent No. 2012-50352, for example.
The pressure-reducing wheel of this transplanter rotates the pressure-reducing arm shaft with a regular hexagonal axis along the lateral direction from the pressure-reducing frame that is fixed to the body frame sideways to the left and right support arms that extend toward the rear of the body. The left and right pressure-reducing wheels can be freely rotated at the rear of the left and right pressure-reducing arms provided rearward from the pressure-reducing arm shaft, and a stand support arm is provided from the pressure-reducing frame downward to the fuselage. It is set as the structure which enables rotation fixation.

Japanese Patent Laid-Open No. 2012-50352 (FIGS. 17, 18, 20, and 21)

  The conventional transplanter is configured to support the left and right pressure-reducing wheels on the pressure-reducing frame with the left and right support arms, the pressure-reducing arm shaft, and the left and right pressure-reducing arms, and to provide the stand-supporting arm and the parking stand on the pressure-reducing frame so as to be fixed up and down. In addition, the structure is complicated and the production cost is high.

  The present invention reduces the production cost by simplifying the pressure-reducing wheel support structure of the transplanter by using a part of the pressure-retaining wheel support part for attaching the pressure-retaining wheel and the stand for supporting the airframe to the airframe. Is an issue.

The problems of the present invention are solved by the following technical means.
According to the first aspect of the present invention, the stand arm (140) for switching between the body support state that is in contact with the ground and the non-use state that is largely separated from the ground is supported so as to be held at an intermediate position slightly lifted from the ground. In (140), a grounding wheel arm (146) that pivotally supports the pressure wheel (15) is provided.

  According to the second aspect of the present invention, a lower groove (141a), a middle groove (141b), and an upper groove (141c) are provided in a stand bracket (141) provided in the traveling vehicle body (1), and a base portion of the stand arm (140) is formed in the lower groove ( 141a) is engaged with the airframe, is engaged with the intermediate groove (141b), is in the intermediate position holding state, is engaged with the upper groove (141c), is not used, and the stand arm (140) A pressure-reducing wheel that pivotally supports the grounding part (152) while biasing the grounding ring arm (146) downward, and pivotally supports the tip of the grounding ring arm (146) while maintaining the intermediate position of the stand arm (140). The pressure-reducing wheel support structure of the transplanter according to claim 1, wherein the pressure-reducing action is performed by grounding 15).

According to the first aspect of the present invention, since the member for attaching the pressure reducing wheel 15 to the traveling vehicle body 1 is composed of the stand arm 140 and the grounding wheel arm 146, the number of members is small and the production cost can be reduced.
In the invention according to claim 2, in addition to the effect of claim 1, when the pressure reducing wheel 15 is used to suppress the pressure, the stand arm 140 is held in the intermediate position and the grounding portion 152 at the tip is brought close to the ground. The ground wheel arm 146 is grounded around the ground contact portion 152 in a downward biased state, and the pressure reducing wheel 15 performs a pressure suppressing action while following the unevenness of the ground. Become.

Tobacco seedling transplanter left side view Top view of tobacco seedling transplanter Partial enlarged plan view of tobacco seedling transplanter (A) Bottom view of seedling supply part, (b) Plan view seen through part of seedling supply part Side sectional view explaining mounting structure of seedling supply unit Perspective view of the planting device as seen from the left front Perspective view of planting device viewed from right rear Side view of planting device (A)-(d) Side view of the planting apparatus in each position during planting operation Side view of the groove body vertical movement mechanism Side view of parking stand Partial enlarged plan view of parking stand Transmission mechanism diagram showing another embodiment of the lifting mechanism of the planting tool Furthermore, the transmission mechanism diagram of the planting tool lifting mechanism of another embodiment Furthermore, the transmission mechanism diagram of the planting tool lifting mechanism of another embodiment Furthermore, the transmission mechanism diagram of the planting tool lifting mechanism of another embodiment

Hereinafter, an exemplary embodiment of the present invention will be described with reference to a tobacco seedling transplanter shown in the drawings.
FIG. 1 is a side view showing a tobacco seedling transplanting machine 10, FIG. 2 is a plan view of the tobacco seedling transplanting machine 10, and FIG. 2 shows a state where movable spare seedling stands 350 </ b> L and 350 </ b> R are accommodated by a two-dot chain line. Indicated.

  In the following description, the front part of the tobacco seedling transplanter 10 is the side where the engine 11 is disposed, and the rear part is the side where the steering handle 16 is disposed. Further, the right hand side of the operator viewing the engine 11 side from the steering handle 16 side is the right side of the tobacco seedling transplanter 10, and the left hand side is the left side.

  As shown in FIGS. 1, 2, and 3, the tobacco seedling transplanter 10 according to the present embodiment includes a traveling vehicle body 1 that allows the vehicle body to travel forward, and an operation for walking operation that is provided at the rear of the traveling vehicle body 1. A handle 16, a planting device 19 for planting tobacco seedlings on a farm field provided at the rear side of the traveling vehicle body 1 and in front of the steering handle 16, and a planting device 19 provided above the planting device 19. And a seedling supply unit 31 for supplying seedlings.

  Further, on the front side of the seedling supply unit 31 and on both the left and right sides of the traveling vehicle body 1, a pair of left and right rectangular fixed preliminary seedling stands 300L and 300R (indicated by two-dot chain lines in FIG. 2) on which tobacco seedlings are placed. Are fixedly arranged.

  When not in use, the pair of left and right fixed preliminary seedling stands 300L and 300R can be stored along the longitudinal direction of the fixed preliminary seedling stands 300L and 300R in a plan view. A pair of left and right rectangular movable spare seedling stands 350L and 350R on which tobacco seedlings are placed, which can be arranged at positions that do not overlap with the spare seedling stands 300L and 300R in plan view (indicated by a two-dot chain line in FIG. 2) Are arranged to be rotatable.

  In addition, the tobacco seedling transplanting machine 10 according to the present embodiment performs seedling transplanting work by planting a seedling with a planting tool 28 on a ridge U that travels across the left and right front wheels 13 and the left and right rear wheels 14. A mechanism 160 is provided at the front of the aircraft, and the left and right saddle guide rollers 250 are in contact with the left and right slopes of the kite U, respectively, and the aircraft is guided and traveled along the kite U.

Next, the configuration of the fixed preliminary seedling stands 300L and 300R and the movable preliminary seedling stands 350L and 350R will be mainly described with reference to FIGS.
In FIG. 3, the top view of the fixed reserve seedling stand and movable reserve seedling stand which were provided in the tobacco seedling transplanting machine 10 of this Embodiment is shown. In FIG. 3, the state which accommodated the movable reserve seedling stand was shown with the dashed-two dotted line.

  The fixed preliminary seedling stands 300L and 300R are connected in parallel with each other by the first connecting member 301 and the second connecting member 302 (see FIG. 3), and the first connecting member 301 side travels through the front support member 303. It is fixed to the upper surface of the vehicle body 1. Further, in the vicinity of the rear of the second connecting member 302, the opposing side wall portions of the pair of left and right fixed preliminary seedling stands 300L and 300R are the upper surfaces of the traveling vehicle body 1 via the rear support members 304, respectively, and the front support It is fixed rearward from the attachment position of the member 303. The pair of left and right fixed preliminary seedling stands 300 </ b> L and 300 </ b> R are inclined downward in the front-rear direction of the traveling vehicle body 1.

  Further, as shown in FIG. 3, the traveling vehicle body 1 is located behind the rear support member 304 on the upper surface of the traveling vehicle body 1 and on the rear end side of the pair of left and right fixed preliminary seedling stands 300L and 300R in plan view. A pair of left and right cylindrical movable support members 310L and 310R are erected at a corner near the center position. And the short side of the pair of left and right pipe-shaped members 311L, 311R bent in a substantially L shape is rotatably inserted into the cylindrical holes of the cylindrical movable support members 310L, 310R. Each long side is attached to the bottom surface side of the movable spare seedling stands 350L and 350R.

  Further, as shown in FIG. 3, the long sides of the pipe-shaped members 311L and 311R are fixed at positions almost on the diagonal lines of the movable spare seedling stands 350L and 350R, and the movable spare seedling stands 350L and 350R are shown in FIG. In the state indicated by the solid line in FIG. 2 (that is, in the use state), the bending angle of the pipe-like members 311L and 311R is set to an acute angle smaller than 90 degrees so as to incline rearwardly in the front-rear direction of the traveling vehicle body 1. .

  Thereby, the pair of left and right movable spare seedling stands 350L and 350R are inclined downward in the front-rear direction of the traveling vehicle body 1 when in use, and when not in use, the pair of left and right cylindrical movable support members 310L and 310R are inclined. Is pivoted manually in the directions of arrows B and C (see FIG. 3), respectively, to be stored below the pair of left and right fixed preliminary seedling stands 300L and 300R. The vehicle body 1 is inclined downward toward the outside in the left-right direction.

  With the above configuration, the pair of left and right fixed preliminary seedling stands 300L and 300R and the pair of left and right movable preliminary seedling stands 350L and 350R are inclined downward in the longitudinal direction of the traveling vehicle body 1, respectively. Since it is easy to see the seedlings at the time of work, it is easy to take the seedlings, and the positions of the pair of left and right movable spare seedling stands 350L and 350R are arranged at positions lower than the positions of the pair of left and right fixed spare seedling stands 300L and 300R. Easy to take seedlings. In addition, the pair of left and right movable spare seedling stands 350L and 350R can be stored under the pair of left and right fixed spare seedling stands 300L and 300R, and do not protrude greatly outside the rear wheel 14 in plan view. Can be stored compactly during use.

  As shown in FIG. 1, FIG. 2 and FIG. 3, a pair of left and right movable spare seedling stands 350L located behind the pair of left and right fixed spare seedling stands 300L, 300R, in front of the seedling supply unit 31 and in use. , 350R are provided with a pair of left and right powder fluid hoppers 410L, 410R. Dispersion hoses 241L and 241R are connected to lower portions of the pair of left and right powder fluid hoppers 410L and 410R, respectively.

As described above, the powder fluid hoppers 410L and 410R are arranged separately at the left and right positions, thereby exhibiting the following effects.
That is, when the powder fluid hopper is combined into one, the volume of the powder fluid hopper increases, which obstructs the forward view for the operator. However, according to the above configuration, the powder fluid hoppers 410L and 410R are separated from each other to the left and right. Because there is a space where you can see the front, it does not interfere with the forward view. Further, a wide powder fluid hopper is likely to be clogged with fertilizer, but according to the above configuration, the fertilizer is not easily clogged. In addition, in the configuration having only one fertilizer feeding portion, the fertilizer feeding time becomes long and spot seeding cannot be performed. However, according to the above configuration, since two fertilizer feeding portions 420L and 420R are provided, spot seeding can be performed. . In addition, fertilizer can be sown in two places with the above configuration.

  Further, as shown in FIG. 1, the spraying hoses 241L and 241R attached to the lower portions of the pair of left and right powder fluid hoppers 410L and 410R have grooves on the front side where the planting tool 28 of the planting device 19 is inserted into the field scene. A hose holding part 431 that is connected to the grooved body 240 to be drilled and holds the tip of the opening is disposed at the lower part of the traveling vehicle body 1.

As shown in FIGS. 10 and 11, the groove forming body 240 is formed with left and right distribution guide walls 240R and 240L in a V-shape with a sharp tip, and the lower end of the tip is pierced into a farm scene to excavate the groove.
The groove body 240 is supported by a groove body support arm 111 extending rearward from the lower portion of the planting transmission case 26.

  As shown in FIG. 10, the lower ends of the spraying hoses 241L and 241R are disposed after the bellows-shaped front discharge pipe 241La branched to the front side of the front end of the grooved body 240 and the upper outer sides of the left and right distribution guide walls 240R and L, respectively. It is formed by a pipe 241Lb, and the front discharge pipe 241La is connected to the spray pipe 239 provided in the groove body 240, and the rear discharge pipe 241Lb is provided with a plurality of spray ports 242.

With this configuration, the fertilizer guided to the spray pipe 239 and the rear discharge pipe 241Lb is discharged into the soil excavated by the groove body 240 without contacting the seedling of the planting tool 28.
Shutters (not shown) are provided at the spraying port of the spraying tube 239 and the spraying port 242 of the rear discharge tube 241Lb, and the opening timing of the normally closed shutter is lowered after the groove body 240 descends and excavation is started. It is possible to reliably prevent the powdered fluid from coming into contact with the seedling by, for example, after the attachment 28 has pierced the field. The shutter is closed when the groove producing body 240 and the planting tool 28 are lifted, so that the fertilizer is not wasted.

  In FIG. 10, the side view of the vertical movement mechanism part of the said groove production body 240 is shown. Further, FIG. 11 shows a plan view of the groove forming body 240, showing only a portion related to the vertical movement mechanism of the groove forming body 240, and omitting the other portions. In FIG. 10, the planting depth rod 53 is indicated by a broken line in order to easily explain the positional relationship seen from the side of the machine body.

The groove body 240 moves up and down in synchronization with the vertical movement of the planting tool 28. The grooving body 240 descends immediately before the planting tool 28 pierces the field, excavates the groove, and seedlings are planted in the groove.
The groove forming body support arm 111 connected to the groove forming body 240 is connected to the lower end portion of the groove forming body lift rod 112 by the lift rod connecting portion 118.

  The groove support arm 111 is disposed between the left ground contact position detector 36 and the right ground contact position detector 37 in plan view, and the front end thereof rotates around the planting transmission case 26 so that the groove body 240 can move up and down. It is attached movably. The groove forming body 240 fixedly supported at the rear end of the rod-shaped groove forming body support arm 111 is disposed behind the left ground contact position detector 36 and the right ground contact position detector 37.

The groove forming body support arm 111 is a lift rod connecting portion 118 provided at the rear, and a base portion of the groove forming body lift rod 112 provided upward is rotatably connected.
The grooved body lift rod 112 has a grooved body lift pin 120 standing above it, and the grooved body lift pin 120 is engaged with the upper surface portion of the tip of the grooved body lift arm 113. The other end of the grooved body lift arm 113 is pivotally attached to a grooved body lift arm support shaft 114 protruding from the side surface of the planting device drive case 27.

  Further, a grooved body drive cam 115 is provided which rotates fixedly to a crank arm drive shaft 89 protruding leftward from the planting device drive case 27. A grooved body rotation roller 116 rotatably provided in the middle part of the grooved body lift arm 113 is arranged in contact with the peripheral edge of the grooved body drive cam 115, and the grooved body The groove forming body lift rod 112 engaged with the groove forming body lift arm 113 by the lift pins 120 is pulled upward corresponding to the position where the groove forming body rotating roller 116 contacts the groove forming body driving cam 115.

  The groove driving cam 115 is disposed between the lower left arm 83 and the lower right arm 97 as shown in FIG. By disposing the groove forming body drive cam 115 between the lower left arm 83 and the lower right arm 97, the structure of the groove forming body vertical movement mechanism can be reduced in size.

A stopper 117 provided with a round hole through which the grooved body lift rod 112 is passed is fixed to the planting device drive case 27.
Further, a downward movement stopper pin 121 that defines the lowest position of the groove forming body 240 is attached to the upper portion of the groove forming body lift rod 112. When the downward movement stopper pin 121 comes into contact with the upper surface of the stopper 117, the groove forming body lift rod 112 is regulated so as not to descend from that position, and the position of the groove forming body 240 at that time moves up and down. This is the lowest position of the groove body 240. Thereby, it can prevent that the groove production body 240 falls too much and digs a groove | channel deeply in an agricultural field.

By changing the position of the grooved body lift rod 112 to which the downward movement stopper pin 121 is attached, the position of the lower limit of the vertical movement of the grooved body 240 can be adjusted.
In addition, by providing a lower-motion stopper pin 121 that can change the mounting position on the upper surface of the stopper 117, the groove forming body lift can be lifted without forcing an unreasonable working posture when adjusting the lower limit position of the groove forming body 240. The rod 112 can be easily operated at the height position on the upper end side.

  As shown in FIGS. 1 and 2, the traveling vehicle body 1 includes an engine 11 and a main transmission case 12 at the front, and a pair of left and right front wheels 13 and a rear wheel 14 as traveling wheels. A planting device 19, a seedling supply unit 31, and a steering handle 16 are provided, and a pressure reducing wheel 15 is further provided.

  The pressure-reducing wheel 15 is pivotally supported at the tip of the grounding wheel arm 146 pivotally supported by the lower end grounding part 152 of the stand arm 140 attached to the stand bracket 141 fixed to the lower part of the rear rising part of the main frame 22. The details are configured as shown in FIGS.

  That is, a lower groove 141a, an intermediate groove 141b, and an upper groove 141c are formed in the stand bracket 141, and the stand arm 140 is attached by an attachment shaft 139 provided in the stand bracket 141 through the long hole 145 of the U-shaped attachment portion 140a of the stand arm 140. A tension spring 144 is stretched between a spring mounting pin 143 provided on the stand bracket 141 and a spring mounting pin 142 provided on the ground ring arm 146. Therefore, the stand arm 140 has a spring mounting pin 142 fitted in the lower groove 141a, middle groove 141b, and upper groove 141c of the stand bracket 141, and is in a state where the machine body is supported in the downward direction, in the intermediate position holding state in the rear downward direction, and in the rear upward direction. It is held in one of the three directions of use. The aircraft body is supported in a downward direction so that it does not fall down. The rear downward direction is the position where the pressure wheel 15 is used, and the rear upward direction is set to this position when traveling with the stand arm 140 and the pressure wheel 15 unused.

  The grounding portion 152 of the stand arm 140 is a horizontally long rod-like body, and an arm boss portion 146 a of the grounding wheel arm 146 is pivotally supported by a grounding wheel arm shaft 154 that passes through the grounding portion 152. Then, a restriction pin 150 protruding from the arm 147 of the arm boss portion 146a is inserted into an arcuate hole 149 formed in the rotation guide 148 fixed to the upper portion of the grounding portion 152, and a torsion spring provided on the stand arm 140 and the arm 147. At 153, the grounding wheel arm 146, that is, the pressure reducing wheel 15 is urged downward.

  Therefore, when the stand arm 140 is in the intermediate position holding state, the pressure-reducing wheel 15 is pressed against the ground by the torsion spring 153, and the left and right sides of the planted seedling are lightly treaded.

  The tobacco seedling transplanter 10 has a front wheel 13 and a rear wheel 14 traveling between the ridges so that the traveling vehicle body 1 straddles the ridge U in the field. It is structured to plant seedlings.

  Further, as shown in FIG. 2, left and right traveling extension cases 40 are provided at the left and right ends of the main transmission case 12 so as to be rotatable with respect to the main transmission case 12. A traveling chain case 20 is attached. Therefore, the power in the main transmission case 12 input from the engine 11 is transmitted to the traveling chain 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 chain case 20, and the airframe travels by driving the pair of left and right rear wheels 14. Therefore, the main transmission case 12 is a transmission device that transmits to the rear wheel 14 as a traveling wheel.

  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 machine body. 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.

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

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

  Accordingly, the traveling chain case 20 is rotated around the left and right output shafts of the main transmission case 12 through the horizontal rod 43, the left rear wheel lifting rod 44 and the right rear wheel lifting rod 45 by the expansion and contraction of the hydraulic lifting cylinder 23. As the traveling chain case 20 rotates, the rear wheel 14 moves up and down to raise and lower the traveling vehicle body 1.

  In addition, a left / right tilt hydraulic cylinder 25 that is actuated by hydraulic pressure from a hydraulic pump is provided in the middle of the left rear wheel lift rod 44 so that the left rear wheel lift rod 44 extends and contracts. The left and right rear wheels 14 are moved up and down based on the vertical position of the right rear wheel 14 by expansion and contraction, and the traveling vehicle body 1 is controlled to a desired left and right inclined posture regardless of the unevenness of the valley portion of the heel U. .

  A pendulum type left / right tilt sensor 42 is provided on the right side of the main transmission case 12, and the left / right tilt sensor 42 detects the left / right tilt via a left / right tilt switching valve provided in the hydraulic pressure switching valve unit 24. The hydraulic cylinder 25 is operated to control the traveling vehicle body 1 to a desired left / right inclined posture.

  The planting device 19 according to the present embodiment includes a planting transmission case 26 in which power from the main transmission case 12 is provided on the rear side of the main transmission case 12 in order to plant seedlings one by one in a field paddle, It is configured to be transmitted and operated via a planting device drive case 27 attached to the planting transmission case 26.

  The planting device 19 includes a hook-shaped planting tool 28 with a sharp tip and an elevating link mechanism 29 that operates to raise and lower the planting tool 28. As shown in FIG. 1, the tip of the planting tool 28 is lowered on the front side and rises on the rear side as shown in FIG. It draws 17 and operates repeatedly in the direction of the arrow in the figure.

Next, the detailed configuration and operation of the planting device 19 of the tobacco seedling transplanter 10 shown in FIG. 1 will be described.
6 and 7 show a perspective view of the planting device 19 as viewed from the left front and a perspective view as viewed from the right rear, respectively. FIG. 8 shows a side view of the planting device 19.

  As shown in FIGS. 6 to 8, the planting device 19 receives a seedling from an opening formed in the upper portion, and has a cup-shaped planting tool 28 with a sharp tip that can be opened and closed left and right, and the planting tool 28. It is comprised from the raising / lowering link mechanism 29 provided in the planting apparatus drive case 27 which raises / lowers.

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

  The elevating link mechanism 29 of the present embodiment has an upper end pivotally supported by the swing cam drive shaft 88 on the left side of the planting device drive case 27 and a lower end pivotally connected by the lower front shaft 91. An upper end is fixed to the front swing arm 80 connected to the support plate 94 and an upper rear shaft 90 that is rotatable with respect to the planting device drive case 27, and a lower end is rotatably connected to the lower rear shaft 93. A front swing arm 80 connected to the support plate 94 and a left rear swing arm 81 provided in front and rear are provided. The upper rear shaft 90 has the other end protruding 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.

  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 and the planting device drive case 27, and projects to the left and right sides. The crank arm drive shaft 89 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, respectively, and the rear end is pivoted by the rotation upper shaft 95 and the rotation lower shaft 96 of the planting tool 28, respectively. A parallel upper arm 82 and a lower left arm 83 are connected freely. On the right side of the planting device drive case 27, the front end is pivotally supported by the lower end portion of the right rear swing arm 99 and the rear end is pivotally connected to the right side of the planting tool 28. Arm 97 is provided.

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

  A crank arm 85 having a base fixed to a crank arm drive shaft 89 that protrudes to the right from the planting 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 with respect to the connecting arm 86.

  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, and that contacts the peripheral edge of the rocking drive cam 84, the left A rotation roller 87 is provided in the middle of the rear swing arm 81 near the upper rear shaft 90 so as to be rotatable.

  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. 9A) for bringing the swing drive cam 84 and the rotation roller 87 into contact with each other is provided.

A counter arm 104 used for opening and closing the planting tool 28 is pivotally supported on a pivot upper shaft 95 to which one end of the upper arm 82 is connected.
The open / close arm 101 is pivotally supported by an upper shaft 92 to which the other end of the upper arm 82 is connected. The open / close arm 101 and the counter arm 104 are connected by a connecting rod 103. . A pin 105 is erected on the counter arm 104, and a hole provided in an opening / closing rod 231 connected to a holder portion of the planting tool 28 is loosely fitted.

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

With this configuration, the planting device 19 according to the present embodiment operates in a configuration in which the tip draws the locus 17 when the tobacco seedling transplanter 10 is stopped during the planting operation.
FIG. 13 shows an embodiment of a transmission mechanism for transmitting a rotational driving force from the swing cam drive shaft 88 to the crank arm drive shaft 89. The first eccentric sprocket 170 is fixed to the swing cam drive shaft 88, and the crank arm drive shaft is fixed. A second eccentric sprocket 171 is fixed to 89, a chain 172 is wound around, and the chain 172 is stretched by an eccentric tension sprocket 173. Since the center of the second eccentric sprocket 171 is eccentric in the direction of the connecting arm 86, the rotation of the swing cam driving shaft 88 that rotates at a constant speed is changed and transmitted to the crank arm driving shaft 89, and the connecting arm 86 is dead. Rotate and rotate to increase the speed at the point. Since both the first eccentric sprocket 170 and the second eccentric sprocket 171 are eccentric and the eccentric direction is shifted by 180 °, the rotational fluctuation is large. If the center of the second eccentric sprocket 171 is eccentric in the direction opposite to the connecting arm 86, the speed at the bottom dead center is slow and the rotational torque is increased.

  FIG. 14 shows a second embodiment of the transmission mechanism for transmitting the rotational driving force from the swing cam drive shaft 88 to the crank arm drive shaft 89. A perfect circular sprocket 179 is fixed to the swing cam drive shaft 88 to drive the crank arm. A second eccentric sprocket 171 is fixed to the shaft 89, a chain 172 is wound around, and the chain 172 is stretched with a tension sprocket 176. The tension sprocket 176 is abutted against an eccentric cam 174 fixed to the crank arm drive shaft 89 by bending a tension arm 178 in the shape of a letter “he” at the portion of the pivot shaft 175 and pivoting the other end side. Yes.

  FIG. 15 shows a third embodiment of the transmission mechanism for transmitting the rotational driving force from the swing cam drive shaft 88 to the crank arm drive shaft 89. The first perfect circle sprocket 180 is fixed to the swing cam drive shaft 88 and the crank A second circular sprocket 181 is fixed to the arm drive shaft 89, a chain 172 is wound around, and a first eccentric tension sprocket 182 and a second eccentric tension sprocket 183 are provided on the loose side and the tension side of the chain 172, and are stretched. . In this transmission, the rotational fluctuation state of the crank arm drive shaft 89 can be changed by changing the mounting phase of the first eccentric tension sprocket 182 and the second eccentric tension sprocket 183. Further, when the first eccentric tension sprocket 182 and the second eccentric tension sprocket 183 are brought closer to the crank arm drive shaft 89, the fluctuation in the rotational speed of the crank arm drive shaft 89 can be increased.

  FIG. 16 shows a configuration in which the upper arm 82 and the lower left arm 83 are controlled by the swing cam 184 and the lift cam 188, and the connection support plate 94 is attached to the planting device drive case 27 by the front swing arm 80 and the rear swing arm 187. The upper arm 82 and the lower left arm 83 are swung back and forth by the action of the swing cam 184 fixed to the swing cam drive shaft 88 and the swing roller 186 pivotally supported by the rear swing arm 187. 83, an elevator arm 190 (corresponding to the aforementioned connection arm 86) is provided, the crank arm 85 is provided so as to be extendable and biased toward the contraction side by a spring, and a connecting portion between the elevator arm 190 and the crank arm 85 is provided. The provided lifting roller 189 contacts the outer periphery of the lifting cam 188 to rotate the crank arm 85 while expanding and contracting, thereby moving the upper arm 82 and the lower left arm 83 up and down. Since the raising / lowering cam 188 is provided with a notch, it can be attached to and detached from the planting device drive case 27 with a bolt so that it can be replaced. Since the crank arm 85 rotates while expanding and contracting, a desired planting up-and-down locus can be obtained. In addition, the raising / lowering roller 189 contacts the outer periphery of the raising / lowering cam 188, and the raising / lowering cam 188 regulates that the downward crank arm 85 contracts in the vicinity of the bottom dead center of the planting raising / lowering locus in which the planting tool 28 enters the soil. Therefore, the planting tool 28 is prevented from being lifted by soil resistance.

Next, operation | movement of the planting apparatus 19 of this embodiment is demonstrated.
Fig.9 (a)-FIG.9 (d) have shown the side view of the planting apparatus 19 in each position in planting operation | movement. FIG. 9A shows a side view at the top dead center, and FIG. 9C shows a side view at the bottom dead center. FIG. 9 (b) shows a side view when descending from the top dead center toward the bottom dead center, and FIG. 9 (d) is a diagram when rising from the bottom dead center toward the top dead center. The side view of is shown.

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

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

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

  As shown in FIG. 8, the planting device 19 according to the present embodiment has a rotating upper shaft connected to the upper arm 82 at the position of the rotating lower shaft 96 connected to the lower left arm 83 in the planting tool 28. It is arranged in front of 95.

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

  When the seedling is supplied to the planting tool 28, that is, when the swinging drive cam 84 is in contact with the rotating roller 87 when the seedling 28 is near the top dead center of the locus 17 where the planting tool 28 operates, In order to make the change in the diameter of the dynamic drive cam 84 small, the swing drive cam 84 comes into contact with the rotation roller 87 when the seedling is planted, that is, when the planting tool 28 is near the bottom dead center. The shape of the swing drive cam 84 and the direction in which the swing drive cam 84 is fixed to the swing cam drive shaft 88 are set so that the change in the diameter of the swing drive cam 84 at the position is large.

  By configuring the shape of the swing drive cam 84 and the direction fixed to the swing cam drive shaft 88 in this way, the moving speed of the tip of the planting tool 28 is supplied more than when the seedling is planted. Time can be extremely slow.

  At the top dead center and the bottom dead center, the crank arm 85 and the connecting arm 86 are linearly overlapped in the vertical direction, and the front swing arm 80, the left rear swing arm 81, and the right rear swing arm. 99 and parallel to 99. Therefore, the crank when the seedling is supplied to the planting tool 28, that is, when the planting tool 28 is near the top dead center, and when the seedling is planted, that is, when the planting tool 28 is near the bottom dead center. The direction of the crank arm 85 is set so that the change in the vertical position of the connecting arm 86 due to the rotation of the arm 85 is small. With this configuration, when the planting operation is performed, the tip of the planting tool 28 is operated so as to draw the loop-shaped locus 17, and the moving speed of the planting tool 28 near the top dead center (position where the seedling is supplied) is increased. The moving speed at the bottom dead center (the position where the seedling is planted) is slower than the moving speed. Therefore, the transplant object can be more reliably supplied to the planting tool 28.

  In addition, when the tip of the planting tool 28 is present at a position for planting the transplant object, the crank arm 85 and the connecting arm 86 are linearly overlapped, so that the vertical movement by the crank arm 85 and the inclination of the connecting arm 86 are caused. The vertical movement matches, and the planting tool 28 can move faster. Further, when the tip of the planting tool 28 exists at a position for planting a transplant object, the crank arm 85 is parallel to the front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99. Therefore, the vertical movement of the front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 is reduced, and the planting tool 28 is moved faster by the vertical movement by the crank arm 85 and the connecting arm 86. Can do.

  Further, the trajectory 17 drawn by the tip of the planting tool 28 has the maximum front-rear width when planting, that is, the front-back width is maximum below the center of the vertical movement width of the planting tool 28. It becomes the composition which becomes. Since the front-rear width of the static locus 17 is the maximum at a position below the center position of the vertical movement width of the tip of the planting tool 28, the movement locus during running of the transplanter is a locus that rises and falls linearly, A transplant object can be planted neatly.

  A parallel link mechanism including the upper arm 82, the lower left arm 83, and the lower right arm 97 of the planting device 19 is operated by one crank arm 85. In order to drive with the uniaxial crank arm 85, the planting malfunction by the backlash of a transmission system can be suppressed.

  Further, the elevating link mechanism 29 is moved back and forth by a swing drive cam 84. Since the swing drive cam 84 is used, the front-rear width of the locus 17 drawn by the tip of the planting tool 28 can be freely set.

  Further, the swing roller 87 that contacts the swing drive cam 84 is positioned at a position closer to the upper rear shaft 90 than the center position in the longitudinal direction of the left rear swing arm 81, that is, a swing that is a fulcrum of the front swing arm 80. Since the cam drive shaft 88 is arranged at a position close to the cam drive shaft 88, the distance from the fulcrum of the swing drive cam 84 can be shortened, and the swing drive cam 84 can be made small. Since the swing drive cam 84 can be made small, the planting device 19 can be downsized.

  Further, since the locus 17 which is a static locus drawn by the tip of the planting tool 28 has a circular shape in the vicinity of the bottom dead center, the movement locus in consideration of the traveling of the tobacco seedling transplanter 10 is near the bottom dead center. The trajectory goes up and down in a straight line, and transplanted objects such as seedlings can be planted neatly. Furthermore, it is desirable to adjust the locus 17 drawn by the tip of the planting tool 28 so that the locus 17 has a circular shape within the range of the planting depth. By making a circular static locus in a range where the planting tool 28 enters the soil, the planting hole can be made small.

  Further, the locus 17 drawn by the tip of the planting tool 28 has a shape in which the front-rear width becomes smaller above the planting depth, so that the amount of movement to the front side when the planting tool 28 ascends can be increased. The tip of the attachment 28 can be configured not to catch the planted seedlings.

  In addition, since the pulling force is applied to the left rear swing arm 81 by the tension spring 167, the planting tool 28 is planted by its own weight when the planting tool 28 is lowered toward the planting position. It can prevent that the attachment tool 28 descend | falls rapidly and the operating speed of the planting tool 28 on the locus | trajectory 17 becomes inadequate. Further, the pulling force by the tension spring 167 assists the planting tool 28 to rise from the bottom dead center against the weight of the planting tool 28, so that the planting tool 28 can be operated stably. it can.

  Further, by rotating the crank arm 85 counterclockwise in FIG. 7 as viewed from the right side, the crank arm 85 rotates in the reverse direction with reference to the loop-shaped locus 17 on which the planting tool 28 operates. Therefore, the moving speed of the planting tool 28 in the vicinity of the top dead center of the locus 17 can be easily reduced. By reducing the moving speed of the planting tool 28 in the vicinity of the top dead center, the seedling can be supplied to the planting tool 28 more reliably.

  In the vicinity of the bottom dead center, the front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 correspond to the movement from the front to the rear, and the rotational connection of the tip of the crank arm 85 is performed. The shaft 106 rotates from the rear to the front. Since the front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 operate in opposition to the crank arm 85, the vertical movement speed of the planting tool 28 can be increased. Even if the stock changes, the change in the movement locus of the tip of the planting tool 28 in the soil taking into account the traveling of the aircraft is small.

  Further, in the vicinity of the bottom dead center, the crank arm 85 and the connecting arm 86 are in a straight line in the vertical direction or a direction close to the vertical direction, so that the vertical movement by the crank arm 85 coincides with the vertical movement by the inclination of the connecting arm 86. The ascending speed of the planting tool 28 can be increased.

  Further, in the vicinity of the bottom dead center, the front swing arm 80, the left rear swing arm 81, and the right rear swing arm 99 are parallel to the crank arm 85 and the connecting arm 86, so that the front swing arm 80 is provided. The vertical movement of the left rear rocking arm 81 and the right rear rocking arm 99 is reduced, and the vertical movement by the crank arm 85 and the connecting arm 86 can raise the planting tool 28 faster.

  Under the above configuration, an operator who intends to use the tobacco seedling transplanting machine 10 according to the present embodiment has a pair of left and right movable spare seedlings stored below the pair of left and right fixed spare seedling stands 300L and 300R. The bases 350L and 350R are rotated around the cylindrical movable support members 310L and 310R, are deployed to the position shown in FIG. 3, and are temporarily fixed by a fixing pin (not shown) or the like. Then, tobacco seedlings are placed on these preliminary seedling stands to prepare for transplantation work.

  Then, an operator walking with the traveling vehicle body 1 travels one seedling prepared in advance in the movable spare seedling stand 350L (350R) and the fixed spare seedling stand 300L (300R) at the work position S (see FIG. 2). Grabbed by hand and put into supply cups 33 rotating in the direction of arrow A (see FIG. 2) as the aircraft is running.

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

  Then, the groove body 240 provided in front of the planting position moves up and down as the planting tool 28 enters the soil to form a groove, and the soil from which the fertilizer is dug by the groove body 240 from the powder fluid hoppers 410L and 410R. Sprinkle into and mix.

DESCRIPTION OF SYMBOLS 1 Running vehicle body 15 Pressure-reducing wheel 140 Stand arm 141 Stand bracket 141a Lower groove 141b Middle groove 141c Upper groove 146 Grounding wheel arm 152 Grounding part

Claims (2)

  A stand arm (140) that switches between a body support state that is in contact with the ground and a non-use state that is largely separated from the ground is supported so as to be held at an intermediate position slightly lifted from the ground, and a pressure reducing wheel (15) is supported on the stand arm (140). ) Is provided with a grounding wheel arm (146) pivotally supported.   The stand bracket (141) provided on the traveling vehicle body (1) is provided with a lower groove (141a), a middle groove (141b), and an upper groove (141c), and the base of the stand arm (140) is engaged with the lower groove (141a) to support the body. The intermediate ring (141b) is engaged to maintain the intermediate position, and the upper groove (141c) is engaged to the unused state, and the grounding arm (152) of the stand arm (140) is connected to the grounding ring arm. (146) is pivotally supported in a state of being biased downward, and the pressure-reducing wheel (15) pivotally supported at the tip of the ground wheel arm (146) is grounded while holding the intermediate position of the stand arm (140) to exert a pressure-reducing action. 2. The pressure-reducing wheel support structure for a transplanter according to claim 1, wherein the structure is supported.

Images