JP6672093B2 - Transplanter and work machine - Google Patents

Description

  The present invention relates to a transplanter for planting seedlings in a field and a working machine including the transplanter.

BACKGROUND ART Conventionally, a transplanter disclosed in Patent Document 1 is known.
The work machine disclosed in Patent Literature 1 is a single-row planting work machine, and includes a traveling body, a rotary cultivator, and a transplanter. Can be planted. The transplanter has a planting device for planting seedlings, and a seedling supply device for supplying seedlings to the planting device.

  The seedling supply device has a large number of pots (seedling holders) that are transferred along a loop-shaped path in plan view. Further, a worktable is provided from above the rotary tiller to above the transplanter, and a seedling holder is provided at the front of the worktable. An operator boarding section is provided behind the seedling placing section and beside the seedling supply device, and the worker can remove the seedling placed in the seedling placing section while sitting on the worker boarding section. It can be supplied to the pot of the seedling supply device.

JP-A-10-271902

The above-described transplanter can efficiently supply the seedlings to the seedling supply device from the side by providing the worker boarding section beside the seedling supply device. However, in the market, creation of a transplanter that can efficiently supply seedlings to the seedling supply device with a more compact configuration has been desired.
Therefore, an object of the present invention is to provide a transplanting machine capable of efficiently supplying seedlings to a seedling supplying device with a compact configuration, and a working machine including the transplanting machine.

A work machine according to one aspect of the present invention includes a ground work machine mounted on a rear portion of a traveling body and working on a field, and a plurality of supply cups arranged behind the ground work machine and containing seedlings. A seedling supply device having a transfer mechanism that transfers the seedling along a long loop path back and forth, and a planting device that is provided below the seedling supply device and seeds a seedling supplied from the seedling supply device in a field, A front chair provided above the ground working machine and in front of the seedling supply device and in which an operator sits, and a side chair provided on one side in the width direction of the traveling body of the seedling supply device and in which the worker sits. A posture changing mechanism for changing the posture of the side chair , wherein the posture changing mechanism changes the posture of the side chair, a first posture in which a seating surface of the side chair is substantially horizontal, Can be changed to the second posture inclined forward from the first posture And an urging mechanism that assists a change operation of the side chair from the first posture to the second posture, a holding mechanism that holds the posture of the side chair in the second posture, It has .

A transplanting machine according to one aspect of the present invention is a rear-mounted grounding machine that is attached to a rear part of a traveling body and works on a field, and has a large number of supply cups for accommodating seedlings in a long loop shape. A seedling supply device having a transfer mechanism for transferring the seedlings along the path, a planting device provided below the seedling supply device and planting seedlings supplied from the seedling supply device in a field, and above the ground working machine And a front chair provided in front of the seedling supply device, where an operator sits, a side chair provided on one side in the width direction of the traveling body of the seedling supply device, in which an operator sits, and a side chair. And a posture changing mechanism for changing a posture , wherein the posture changing mechanism changes the posture of the side chair, a first posture in which a seating surface of the side chair is substantially horizontal, and a first posture. It can be changed to a second posture inclined forward, and It includes a biasing mechanism for assisting the operation of changing to the second position from the first position of the serial side chair, and a holding mechanism for holding the posture of the lateral chair in the second position.

  According to the above working machine, a ground working machine attached to the rear part of the traveling body and working on the field, and a long loop of a number of supply cups arranged behind the ground working machine and containing seedlings, Seedling supply device having a transfer mechanism for transferring the seedlings along a path, a planting device provided below the seedling supply device and planting the seedlings supplied from the seedling supply device in a field, and a seedling above and above the ground working machine A front chair provided in front of the supply device and on which an operator sits. Accordingly, the worker can sit on the front chair above the ground working machine and supply the seedlings to the seedling supply device from the front of the seedling supply device. Therefore, the operation of supplying seedlings to the seedling supply device can be efficiently performed with a compact configuration.

  According to the above transplanter, a seedling having a transfer mechanism disposed behind a ground working machine that works on a field and transferring a number of supply cups containing seedlings along a long loop path back and forth. A supply device, a planting device provided below the seedling supply device and for planting the seedlings supplied from the seedling supply device in a field, and a front side above the ground working machine and provided in front of the seedling supply device, where an operator sits. And a chair. Thus, when used in conjunction with the ground work machine, the worker can sit on the front chair above the ground work machine and supply the seedlings to the seedling supply device from the front of the seedling supply device. Therefore, the operation of supplying seedlings to the seedling supply device can be efficiently performed with a compact configuration.

It is a side view of a working machine. It is a schematic plan view of a ground work machine (rotary tiller) and a transplanter. FIG. 3 is a schematic rear view of the transplanter. It is a side view which shows the connection relationship of a rotary machine frame and a transplant machine frame. It is a top view which shows the periphery of a front chair. It is a side view of a front chair. It is a top view which shows the position of the worker who sat on the front chair and the side chair. It is a top view of a position adjustment mechanism and a posture change mechanism. It is a rear view which shows the periphery of a side chair. It is explanatory drawing which shows the effect | action of a position adjustment mechanism. It is a side view of a posture change mechanism. It is a top view of a posture change mechanism. It is explanatory drawing which shows the effect | action of an attitude | position change mechanism. It is explanatory drawing which shows the effect | action of an attitude | position change mechanism. It is explanatory drawing which shows the effect | action of an attitude | position change mechanism. FIG. 3 is a partial side sectional view of a first height changing device. It is a rear view of a 1st height change apparatus. It is a schematic structure figure showing a power transmission system. It is a side view of a transplantation frame and an implanting device. It is a top view of a transplantation frame. It is a rear view of an implantation frame. It is a side view of a planting tool stopping mechanism. It is a top view of a planting tool stopping mechanism. It is a top view of a planting device. It is a schematic plan view of a seedling supply apparatus. It is a rear sectional view of a seedling supply device. It is an arrangement view of a lid of a supply cup. It is a top view of a multi-film laying apparatus. It is a top view of a multi-film laying apparatus. It is a side view of a multi-film laying apparatus. It is a rear view of a multi-film laying apparatus. It is a plane partial sectional view of a front part of a multi-film laying device. It is a partial side sectional view of the front part of a multi-film laying device. It is a partial side sectional view of the front part of a multi-film laying device. It is a plane partial sectional view of the back of a multi-film laying device. FIG. 3 is a partial cross-sectional side view of a rear portion of the multi-film laying device. FIG. 4 is a partial cross-sectional view of the back of the rear part of the multi-film laying device. It is a rear view which shows the grooving position of a grooving member. It is a rear view which shows the holding | maintenance position and a gauge wheel of a film presser. It is a side view of a covering ring and a covering frame. It is a rear view of an earth covering wheel and an earth covering frame. It is side sectional drawing of the upper part of a soil covering frame. FIG. 41 is a sectional view taken along line AA of FIG. 40. FIG. 41 is a sectional view taken along line BB of FIG. 40. 41 is a sectional view taken along line CC of FIG. 40. FIG. FIG. 41 is a cross-sectional view taken along line DD of FIG. 40. FIG. 5 is a partial side sectional view of a lower portion of a vertical support member. FIG. 45B is a sectional view taken along line EE of FIG. 45A. FIG. 6 is a partial side sectional view of a second frame. It is a plane partial sectional view of a 2nd frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a working machine 4 capable of planting (transplanting) seedlings together with ground work (tiling and the like) while traveling. The work machine 4 includes a traveling body 1, a ground working machine 2 mounted on a rear portion of the running body 1, and a transplanter 3 mounted on the ground working machine 2.
In the present embodiment, a tractor that is a traveling vehicle is illustrated as the traveling body 1. In addition, a rotary tiller is illustrated as the ground work machine 2. The traveling body 1 is not limited to a tractor, and may be another traveling vehicle. In addition, the ground work machine 2 is not limited to a rotary tiller, and may be any machine that works on a field. For example, the ground work machine 2 may be a ridge machine that ridges a field. Although the rotary tiller 2 is illustrated as a side drive type rotary tiller, it may be a center drive type rotary tiller.

  FIG. 1 shows a side view of the working machine 4. In the embodiment, unless otherwise specified, the front side (left side in FIG. 1) of the driver sitting on the driver's seat 5 of the tractor 1 is forward, the rear side of the driver (right side in FIG. 1) is rearward, and the left side of the driver (FIG. 1 is described as a left side, and the right side of the driver (a back side in FIG. 1) is described as a right side. The horizontal direction K2 (see FIG. 2), which is a direction orthogonal to the front-rear direction K1 (see FIG. 1) of the tractor 1, will be described as the width direction.

  The direction of arrow K3 in FIG. 2 will be described outward in the width direction, and the direction of arrow K4 in FIG. The outside in the width direction is a direction from the center in the width direction of the tractor 1 to the right or left. In other words, the outward direction in the width direction refers to the direction in the width direction K2 and away from the center of the tractor 1 in the width direction. The inside in the width direction is a direction opposite to the outside in the width direction. In other words, inward in the width direction is the width direction K2 and a direction approaching the widthwise central portion of the tractor 1.

  The tractor (traveling body) 1 has a vehicle body 6, a front wheel (not shown) mounted on a front part of the vehicle body 6, and a rear wheel 7 mounted on a rear part of the vehicle body 6. The vehicle body 6 is configured by directly connecting an engine, a clutch housing having a clutch, a transmission case having a transmission, a differential case having a differential, and the like. The driver's seat 5 is provided at the rear of the vehicle body 6. A steering wheel 8 is provided in front of the driver's seat 5. A PTO shaft 22 for taking out power is provided at a rear portion of the vehicle body 6.

As shown in FIG. 1, the rotary tiller 2 is mounted on a rear portion of the tractor 1 via a three-point link mechanism 9 and a connection frame 10 so as to be able to move up and down. The three-point link mechanism 9 is mounted on a rear part of the vehicle body 6. The connection frame 10 is provided at a rear portion of the three-point link mechanism 9. The rotary tiller 2 is attached to the connection frame 10.
As shown in FIGS. 1 and 2, the rotary tiller 2 has a rotary machine frame (working machine frame) 11. The rotary machine casing 11 includes a gear case 12, a left support arm 13L, a right support arm 13R, a transmission case 14, and a side frame 15. The gear case 12 is located substantially at the center of the rotary tiller 2 in the width direction K2. The support arm 13L protrudes leftward from the left part of the gear case 12. The support arm 13R protrudes rightward from the right part of the gear case 12. The upper part of the transmission case 14 is attached to the left end of the support arm 13L. The upper part of the side frame 15 is attached to the right end of the support arm 13R. A rotation shaft 16 is provided between a lower portion of the transmission case 14 and a lower portion of the side frame 15. A large number of tilling claws 17 are fixed to the outer periphery of the rotating shaft 16 via brackets. The rotating shaft 16 and the tilling claw 17 form a tilling portion 18.

The upper part of the tilling part 18 is covered with an upper cover 19A. The rear of the tilling part 18 is covered with a rear cover 19B. The upper end of the rear cover 19B is pivotally supported by the upper cover 19A, and is swingable up and down. The rear cover 19 </ b> B is urged downward by the repression device 20. The repression device 20 is a device that urges the rear cover 19B downward by the force of a spring.
The gear case 12 is provided with an intake shaft 21. The power of the PTO shaft 22 is transmitted to the intake shaft 21 via a joint. The power transmitted to the intake shaft 21 is transmitted to a chain transmission means in the transmission case 14 via a gear mechanism in the gear case 12 and a shaft in the support arm 13L. The rotating shaft 16 is driven by the power transmitted to the chain transmission means. The rotation shaft 16 is rotated in the direction of arrow A1 in FIG. When the rotating shaft 16 rotates in the A1 direction, the tilling claw 17 plows the soil and throws it to the rear part cover 19B. The soil tilled by the tilling unit 18 is leveled by the rear cover 19B to form an upper surface of the ridge. The side surface of the ridge is formed by ridgers 23L and 23R described later.

The rotary machine casing 11 has a left support stay 24L, a right support stay 24R, and a mast 25. The support stay 24L is fixed to the support arm 13L. The support stay 24R is fixed to the support arm 13R. The mast 25 is fixed to the gear case 12.
The transplanter 3 mounted behind the rotary cultivator 2 includes a support frame 26 pivotally supported by support stays 24L and 24R, a left gauge wheel (support wheel) 27L, and a right gauge wheel (support wheel) 27R. A second height changing device 28 pivotally supported by the mast 25, a second support frame 232 (see FIG. 5) provided between the left swing arm 31L and the right swing arm 31R, And a lower support 234 (see FIG. 4) for supporting the front portion of the second support frame 232 from below.

  The support frame 26 is a frame material that supports the gauge wheels 27L and 27R. The gauge wheels 27L and 27R are members that set the height of the rotary tiller 2 (ground work machine). In other words, the gauge wheels 27L and 27R are members for setting the tillage depth of the rotary tiller 2. The second height changing device 28 is a device that changes the setting of the gauge wheels 27L and 27R by swinging the support frame 26 up and down.

As shown in FIGS. 2, 4, and 5, the support frame 26 includes a front frame 29 pivotally supported by the support stays 24L and 24R, and a rear frame 30 connected to a rear portion of the front frame 29.
The front frame 29 includes a left swing arm 31L, a right swing arm 31R, an upper connecting rod 32U, a lower connecting rod 32D, a left vertical frame member 33L, and a right vertical frame member 33R. , A left connecting rod 202L, a right connecting rod 202R, a left support member 224L, and a right support member 224R. The swing arm 31L, the swing arm 31R, the connecting rod 32U, the connecting rod 32D, the vertical frame members 33L and 33R, and the connecting rods 202L and 202R are formed of a pipe material.

  The swing arm 31L is pivotally supported by the support stay 24L via a pivot shaft whose front end is inserted through the pivot support plate 201L. The swing arm 31L projects rearward from the support arm 13L. The swing arm 31R is pivotally supported by the support stay 24R via a pivot shaft whose front end is inserted into the pivot support plate 201RL. The swing arm 31R projects rearward from the support arm 13R. The connecting rod 32U connects the rear ends of the swing arm 31L and the swing arm 31R. The upper portion of the left vertical frame member 33L is fixed to the left portion of the swing arm 31L, and extends downward from the left portion of the swing arm 31L. The upper portion of the right vertical frame member 33R is fixed to the right portion of the swing arm 31R, and extends downward from the right portion of the swing arm 31R. The left connecting rod 202L has a front portion fixed to a lower portion of the vertical frame member 33L and extends rearward from a lower portion of the vertical frame member 33L. The right connecting rod 202R has a front portion fixed to a lower portion of the vertical frame member 33R, and extends rearward from a lower portion of the vertical frame member 33R.

The front frame 29 is swingable up and down around a pivot portion at the front end of the swing arm 31L and the swing arm 31R.
As shown in FIGS. 5 and 6, the support members 224L and 224R support chairs 231L and 231R for the worker (for the worker to sit on), respectively. Hereinafter, the chairs 231L and 231R are referred to as front chairs for convenience. Further, the right front chair 231R is referred to as a first front chair, and the left front chair 231L is referred to as a second front chair.

  The left support member 224L supports the second front chair 231L from below. The support member 224L includes a support rod 225, a first vertical cylinder 226, a second vertical cylinder 298, a rear member 227A, a front member 227B, and an intermediate member 227C. The right end of the support rod 225 is fixed to a middle part of the swing arm 31L in the front-rear direction K1, and extends leftward from the middle part. The first vertical cylinder 226 is fixed to the left end of the support rod 225 and extends upward. The second vertical cylinder 298 is inserted into and fixed to the first vertical cylinder 226. The second vertical cylinder 298 protrudes upward from the upper end of the first vertical cylinder 226. An intermediate member 227C is fixed to an upper end of the second vertical cylinder 298. The intermediate member 227C extends in the front-rear direction K1, and has a front member 227B provided at a front end and a rear member 227A provided at a rear end. The front member 227B and the rear member 227A extend in the width direction K2 parallel to each other with an interval in the front-rear direction. The lower end of the spring 228 is attached to both ends of the upper surface of the rear member 227A. A rotation plate 229 is attached to the front member 227B. The rotation plate 229 has a first plate portion 229A and a second plate portion 229B. The first plate portion 229A extends in the width direction K2, and is fixed to the bottom front portion of the second front chair 231L with bolts 252. The second plate portions 229B extend downward from both ends (right end and left end) of the first plate portion 229A in the width direction K2. The first plate portion 229A is pivotally supported by a pin 230 with respect to the front member 227B. Thus, the rotation plate 229 can rotate rearward (in a direction in which the worker sitting on the second front chair 231L faces) with the pin 230 as a fulcrum (center). As shown by a virtual line (two-dot chain line) in FIG. 6, the second front chair 231L behaves integrally with the rotating plate 229, and moves backward (second (The direction in which the worker sitting on the front chair 231L faces). A recess 231a is provided at the rear of the bottom surface of the second front chair 231L. The upper end of the spring 228 is fitted in the concave portion 231a. This suppresses the vibration generated due to the driving of the ground work machine 1 from propagating to the chair 231L.

  The right support member 224R supports the right chair 231R (hereinafter, referred to as a second front chair) from below. The support member 224L is configured symmetrically with the support member 224L with respect to the center line in the width direction K2. That is, the right end of the support rod 225 of the support member 224R is fixed to a middle part of the swing arm 31L in the front-rear direction K1, and extends leftward from the middle part. Other configurations of the support member 224R are the same as those of the support member 224L. The second front chair 231R is fixed to a first plate portion of the support member 224R, and can be tilted rearward (in a direction in which a worker sitting on the second front chair 231R faces).

  As shown in FIG. 7, the first front chair 231R is located in front of a first seedling supply device 72A described later. Specifically, the first front chair 231R is located on the front extension line L1 of the center line in the width direction of the path P of the first seedling supply device 72A described later. This allows the worker H to sit facing the first seedling supply device 72A side (rearward). The second front chair 231L is located in front of a second seedling supply device 72B described later. Specifically, the second front chair 231L is located on a front extension line L2 of a center line in the width direction of a path P of a second seedling supply device 72B described later. This allows the worker H to sit facing the second seedling supply device 72B side (rearward).

  As shown in FIGS. 2 and 4, the rear frame 30 is connected to the rear portions of the connecting rods 202L and 202R forming the front frame 29. The rear frame 30 includes a central horizontal frame member 34C, a left horizontal frame member 34L, a right horizontal frame member 34R, a left vertical frame member 35L, a right vertical frame member 35R, and a left wheel frame 36L. , A right wheel frame 36R, a left front member 204L, a right front member 204R, a left rear member 205L, a right rear member 205R, a left connecting rod 206L, and a right connecting rod 206R. Having. Horizontal frame material 34C, horizontal frame material 34L, horizontal frame material 34R, vertical frame material 35L, vertical frame material 35R, wheel frame 36L, wheel frame 36R, front member 204L, front member 204R, rear member 205L, rear member 205R, connection The rod 206L and the connecting rod 206R are formed of a pipe material.

  As shown in FIG. 2, the horizontal frame member 34C is located behind the front frame 29 and extends in the width direction K2. The horizontal frame member 34C is connected to the rear end of the connecting rod 202L and the rear end of the connecting rod 202R. The horizontal frame member 34L is inserted and fixed to the left end of the horizontal frame member 34C, and protrudes leftward from the left end of the horizontal frame member 34C. The horizontal frame member 34R is inserted and fixed to the right end of the horizontal frame member 34C, and protrudes rightward from the right end of the horizontal frame member 34C. The front member 204L has a front portion fixed to the left end of the horizontal frame member 34L, and extends rearward from the left end of the horizontal frame member 34L. The front member 204R has a front portion fixed to the right end of the horizontal frame member 34R, and extends rearward from the right end of the horizontal frame member 34R. The vertical frame member 35L has an upper end fixed to the left portion of the horizontal frame member 34C, and extends downward from the left portion. The vertical frame member 35R has an upper end fixed to the right portion of the horizontal frame member 34C, and extends downward from the right portion.

  As shown in FIGS. 2, 4, and 8, the wheel frame 36L has a front member 37L and a rear member 38L. The front member 37L has a front portion fixed to a lower portion of the vertical frame member 35L, and extends rightward from a lower portion of the vertical frame member 35L. The front end of the rear member 38L is fixed to the left end of the front member 37L, and extends rearward from the left end. The wheel frame 36R has a front member 37R and a rear member 38R. The front member 37R has a front portion fixed to a lower portion of the vertical frame member 35R, and extends leftward from a lower portion of the vertical frame member 35R. The front end of the rear member 38R is fixed to the right end of the front member 37R, and extends rearward from the right end.

A gauge wheel (supporting wheel) 27L is rotatably attached to a rear portion of the wheel frame 36L. A right gauge wheel (supporting wheel) 27R is rotatably attached to a rear portion of the wheel frame 36L.
A ridger (ridger) 23L is arranged in front of the gauge wheel 27L. A ridger (ridger) 23R is also arranged in front of the gauge wheel 27R. The ridger 23L is attached to a lower portion of the vertical frame member 35L. The ridger 23R is attached to a lower portion of the vertical frame member 35R. The ridger 23L forms the left side surface of the ridge. The ridger 23R forms the right side surface of the ridge.

  The lower portion of the connecting rod 206L is fixed to a longitudinally intermediate portion of the wheel frame 36L (the rear member 38L), and the upper portion is fixed to a longitudinally intermediate portion of the front member 204L. Thereby, the connecting rod 206L connects the wheel frame 36L and the front member 204L. The lower portion of the connecting rod 206R is fixed to an intermediate portion in the front-rear direction of the wheel frame 36R (the rear member 38R), and the upper portion is fixed to an intermediate portion in the front-rear direction of the front member 204R. Thereby, the connecting rod 206R connects the wheel frame 36R and the front member 204R.

  The rear member 205L has a front end pivotally supported at the rear end of the front member 204L, and extends rearward from the rear end of the front member 204L. A horizontal shaft member 207L extending in the width direction K2 is attached to a front end of the rear member 205L. A support member 208L is fixed to the rear end of the front member 204L, and both ends of the horizontal shaft member 207L are supported by the support member 208L. Thus, the rear member 205L is rotatable about the horizontal shaft member 207L as a fulcrum (center) with respect to the front member 204L. The rear member 205R has a front end pivotally supported by the rear end of the front member 204R, and extends rearward from the rear end of the front member 204R. The rear member 205R has a structure similar to that of the rear member 205L, and is rotatable with respect to the front member 204R.

  At the rear of the rear member 205L, a protruding member 40L that protrudes outward in the width direction K3 is provided. A protruding member 40R that protrudes outward in the width direction K3 is also provided at a rear portion of the rear member 205R. As shown in FIG. 9, a plurality of through holes 210 are provided in the protruding member 40L at intervals in the protruding direction (width direction K2). Similarly to the protruding member 40L, a plurality of screw holes (not shown) are provided in the protruding member 40R side by side at intervals in the protruding direction. The number of the through holes 210 may be two or more, and is not limited. In the present embodiment, three through holes 210 are provided. For convenience of explanation, the innermost screw hole in the width direction K2 is defined as the inner through hole 210A, and the outermost screw hole in the width direction K2 is defined as the outer through hole 210C and the inner through hole 210A as the outer hole. The screw hole located between the through hole 210C and the through hole 210C is referred to as an intermediate through hole 210B.

A cylindrical body 209L is fitted on the outer periphery of the protruding member 40L so as to be movable in the width direction K2 along the protruding member 40L. A cylindrical body 209R is fitted on the outer periphery of the protruding member 40R so as to be movable in the width direction K2 along the protruding member 40R. In FIG. 9, an enlarged cross section of the AA portion is shown in a virtual line circle.
A column 41L is fixed to the cylindrical body 209L. The support 41L extends upward from the cylindrical body 209L. A support 41R is fixed to the cylindrical body 209R. The support 41R extends upward from the cylindrical body 209R. Chairs 42L and 42R for the worker (to sit on the worker) are provided at the upper ends of the support 41L and the support 41R, respectively. Hereinafter, the chairs 42L and 42R are referred to as side chairs 42L and 42R for convenience. The chair 42R is referred to as a first side chair 42R, and the chair 42L is referred to as a second side chair 42L.

  As shown in FIG. 7, the first side chair 42R is located on one side (right side) in the width direction K2 of the first seedling supply device 72A described later, and the worker H is placed on the first seedling supply device 72A side. (Left). The second side chair 42L is located on the other side (left side) in the width direction K2 of a second seedling supply device 72B described later, and the worker H faces the second seedling supply device 72B side (rightward). You can sit.

The side chairs 42L and 42R have the same configuration as the front chairs 231L and 231R, and can be tilted forward (in the direction in which the worker sitting on the side chairs 42L and 42R faces).
As shown in FIG. 9, a through hole 211 is formed in the cylindrical body 209L. Although not shown, a through-hole 211 is formed in the cylindrical body 209R as well as the cylindrical body 209L. The cylinders 209L and 209R are positioned and fixed with respect to the protruding members 40L and 40R by overlapping the through-hole 211 and the through-hole 210 and inserting and fixing a bolt or the like (not shown) into the through-hole 211. can do.

The above-mentioned protruding members 40L, 40R, cylindrical bodies 209L, 209R, through holes 210, through holes 211, bolts and the like can adjust the position in the width direction K2 of the first side chair 42R and the second side chair 42L. It constitutes an adjustment mechanism. Hereinafter, the operation of the position adjustment mechanism will be described by taking as an example a case where the position of the second side chair 42L is adjusted.
First, when the through-hole 211 of the cylindrical body 209L and the inner through-hole 210A of the protruding member 40L are overlapped and the cylindrical body 209L is fixed to the protruding member 40L by a screw, the second side chair 42L is most The position is inward in the width direction (referred to as a first position) (see the left diagram in FIG. 10). Secondly, when the through-hole 211 and the outer through-hole 210C are overlapped and the cylinder 209L is fixed to the protruding member 40L, the second side chair 42L is positioned most outward in the width direction (second position). (Refer to the right diagram in FIG. 10). Third, when the through-hole 211 and the intermediate through-hole 210B are overlapped and the cylinder 209L is fixed to the protruding member 40L, the second side chair 42L is positioned between the first position and the second position. Becomes

  A left base plate 212L is fixed to a lower portion of the left support 41L. The base plate 212L extends inward in the width direction K2 from the upper portion of the column 41L. A base plate 212L is fixed to a lower portion of the right support 41R. The base plates 212L and 212R are located inside the width direction K4 of the columns 41L and 41R. In the case of the present embodiment, the base plates 212L and 212R are rectangular in plan view, with long sides facing the front-rear direction K1 and short sides facing the width direction K2. The base plates 212L and 212R have a role of a footrest when the worker sits on the side chairs 42L and 42R and a function of protecting the feet of the worker from rear support wheels 213L and 213R described later. I have. The base plate 212L is fixed to the cylindrical body 209L via the column 41L. Therefore, when the cylinder 209L is moved in the width direction K2 along the protruding member 40L, the base plate 212L also moves in the width direction K2 together with the cylinder 209L. Similarly, the base plate 212R moves in the width direction K2 together with the cylindrical body 209R. Therefore, even if the positions of the side chairs 42L, 42R are changed, the positional relationship between the side chairs 42L, 42R and the base plates 212L, 212R does not change, and the above function is maintained. Note that the base plates 212L and 212R may be fixed to a position where they can move together with the cylinders 209L and 209R, and may be directly fixed to the cylinders 209L and 209R.

An upper portion of the stay 217L is fixed to a front portion of the rear member 205L. The stay 217L extends downward from the rear member 205L. Similarly, a stay (not shown) is fixed to the forward portion of the rear member 205R and extends downward. At the lower part of these stays, the distal end of an urging mechanism 215 described later is attached.
An upper portion of the wheel stay 39L is fixed to a position closer to the rear of the rear member 205L. The wheel stay 39L is located behind the stay 217L and the column 41L, and extends downward from the rear member 205L. The upper part of the wheel stay 39R is also fixed to a position near the rear of the rear member 205R. The wheel stay 39R extends downward from the rear member 205R. A rear support wheel 213L is rotatably attached to a lower portion of the wheel stay 39L. The rear support wheel 213L is located behind the gauge wheel (support wheel) 27L and below the second side chair 42L. A rear support wheel 213R is rotatably attached to a lower portion of the wheel stay 39R. The rear support wheel 213R is located behind the gauge wheel (support wheel) 27R and below the first side chair 42R. The rear support wheels 213L and 213R support the weight of the worker sitting on the side chairs 42L and 42R.

  As shown in FIG. 5, the second support frame 232 is located between the left swing arm 31L and the right swing arm 31R, and extends in the front-rear direction K1. As shown in FIG. 4, the second support frame 232 supports an operation unit 233 described later. The second support frame 232 includes a left support frame 232L, a right support frame 232R, a first connection frame 232A, and a second connection frame 232B. The support frame members 232L and 232R extend in the front-rear direction K1 in parallel with each other. The support frame member 232L has a front end fixed to the left portion of the mast 25 and extends rearward. The support frame member 232R has a front end fixed to the right part of the mast 25 and extends rearward. The first connection frame member 232A extends in the width direction K2, and connects a middle portion of the support frame member 232L in the front-rear direction and a middle portion of the support frame member 232R in the front-rear direction. The second connection frame member 232B extends in the width direction K2, and connects the rear end of the support frame member 232L and the rear end of the support frame member 232R.

  The operation unit 233 includes a case 233A, an operation member 233B, and a control device (not shown) housed inside the case 233A. In the present embodiment, the case 233A has a substantially rectangular parallelepiped shape, and the length in the front-rear direction K1 is longer than the length in the width direction K2. The length of the case 233A in the width direction K2 is set to be larger than the distance between the inner end of the support frame member 232L and the inner end of the support frame member 232R. Thus, the lower portion of the case 233A is supported by the upper surface of the support frame member 232L and the upper surface of the support frame member 232R. The rear part of the case 233A is in contact with a front part of a bracket main body 60 described later. The operation member 233B is provided on the upper surface of the case 233A. The operation member 233B is a member for performing a setting operation regarding planting of seedlings. In the present embodiment, the operation members 233B are rotary knobs, and a plurality (four) of the operation members are arranged in the front-rear direction. The operation member 233 </ b> B is, for example, a knob for setting switching between strains, a knob for setting seedling emptying, and the like. However, the number, type, and arrangement of the operation members 233B can be appropriately changed. The control device controls settings related to planting of seedlings based on the operation of the operation member 223B.

  The operation unit 233 is arranged between the first front chair 231R and the second front chair 231L. The operation unit 233 is disposed at a position forward of the center of the seating surface of the first front chair 231R and the second front chair 231L. Accordingly, the worker sitting on the first front chair 231R and the second front chair 231L can perform the operation using the operation unit 233 by reaching inward in the width direction and forward in the seated state. Very good workability.

As shown in FIGS. 2, 4, and 11 to 15, the transplanter 3 of the present embodiment includes a posture changing mechanism 214 that changes the posture of the side chairs 42 </ b> L and 42 </ b> R.
The posture changing mechanism 214 changes the postures of the side chairs 42L and 42R into a first posture (see FIG. 4) in which the seating surfaces 42a of the side chairs 42L and 42R are substantially horizontal, and forward (see FIG. 4). The second posture (see FIG. 14) can be changed to the left posture of the worker sitting on the side chair 42L and the right posture of the worker sitting on the side chair 42R. In the second posture, the seating surfaces 42a of the side chairs 42L and 42R are substantially vertical (substantially perpendicular to the ground). Specifically, in the second posture, the angle of the rear member 205L with respect to the front member 204L and the angle of the rear member 205R with respect to the front member 204R are 90 degrees or less (for example, about 80 to 90 degrees). When the side chairs 42L, 42R are not used, by changing the postures of the side chairs 42L, 42R to the second posture, the length of the implanter 3 in the front-rear direction K1 can be shortened. In addition, when the operator lifts the ground work machine (rotary cultivator) 2 in a state where the worker is not sitting on the side chairs 42L and 42R, the side chairs 42L and 42R are automatically folded (second). Posture). When the ground work machine 2 is lifted while the worker is sitting on the side chairs 42L and 42R, the rear member 205L is moved forward so that the seating surfaces of the side chairs 42L and 42R remain substantially horizontal. It rotates about the horizontal shaft member 207L with respect to the member 204L.

Hereinafter, the configuration and operation of the posture changing mechanism 214 that changes the posture of the second side chair 42L, which is the left side chair, will be described. The configuration and operation of the posture changing mechanism for changing the posture of the first side chair 42R are the same as the configuration and operation of the posture changing mechanism 214 for changing the posture of the second side chair 42L, and thus the description thereof is omitted.
The posture changing mechanism 214 includes a horizontal shaft member 207, a support member 208, a biasing mechanism 215, and a holding mechanism 216.

The urging mechanism 215 assists the force required for the operation when the operator changes the posture of the second side chair 42L from the first posture to the second posture. In the case of the present embodiment, the urging mechanism 215 is a damper constituted by a hydraulic cylinder. The damper 215 has a biasing force in the extending direction.
The damper 215 assists the operation of changing the posture of the second side chair 42L. The base end of the damper 215 is attached to the connecting rod 206L. The tip of the damper 215 is attached to the lower part of the stay 217L. The urging force of the damper 215 is used when the operator performs an operation of rotating the rear member 205L upward about the horizontal shaft member 207 as a fulcrum (center) (operation for changing the state of FIG. 4 to the state of FIG. 14). Assist the necessary power.

  As shown in FIG. 11, the holding mechanism 216 holds the second side chair 42L in the second posture. The holding mechanism 216L includes a support rod 218, a pivot 219, a locking piece 220, a locking pin 221, a spring 222, and an operation member 223. The support rod 218 is fixed to the rear end of the front member 204L and extends upward. The pivot 219 is attached to an upper portion of the support rod 218 and extends in the width direction K2. The locking piece 220 has a circular arc-shaped notch 220a whose base end is fixed to the pivot 219 and whose locking pin 221 can be fitted into the distal end. The locking piece 220 is rotatable around a pivot 219 as a fulcrum (center). The locking pin 221 is fixed to the front part of the rear member 205L, and extends in the width direction K2. One end of the spring 222 is locked by a pin 299 protruding from the rear of the front member 204L, and the other end is locked by a hole 220b provided in the locking piece 220. The spring 222 applies an urging force to the locking piece 219 to rotate downward (clockwise in FIG. 11) with the pivot 219 as a fulcrum (center). The operation member 223 is fixed to the base end side of the locking piece 220. The operation member 223 is a member that the operator grips when performing an operation of rotating the locking piece 220 about the pivot 219 as a fulcrum.

Hereinafter, the operation of the holding mechanism 216 will be described.
First, the worker changes the posture of the second side chair 42L from the first posture to the second posture using the posture changing mechanism 214 described above. In a state where the second side chair 42L is in the second posture, the operator grips the operation member 223 and rotates the locking piece 220 in the clockwise direction (the direction of the arrow A in FIGS. 13 and 15). Then, the notch 220a of the locking piece 220 is locked to the locking pin 221. 13 and 15 show the state before locking, and the right figures of FIGS. 14 and 15 show the state after locking. By locking the notch 220a of the locking piece 220 to the locking pin 221, the rear member 205 </ b> L is prevented from rotating downward with the horizontal shaft member 207 </ b> L as a fulcrum. It is held in the second posture. Further, since the locking piece 222 is urged downward by the spring 222, the cutout 220a is provided unless the operator performs an operation of rotating the locking piece 222 upward against the urging force of the spring 222. Is not released from the lock pin 221. Therefore, the second side chair 42L can be reliably held in the second posture.

  As shown in FIG. 4, the lower support 234 supports the front part of the second support frame 232 from below. The lower support 234 has a front rod 235, a mounting plate 236, and a connecting rod 237. The front rod 235 has a front end fixed to a front part of the upper surface of the upper cover 19A with a bolt, and extends rearward from the front part. The mounting plate 236 and the connecting rod 237 are provided on the left and right sides of the center in the width direction K2, respectively. The left mounting plate 236 is fixed to a front portion of the support frame member 232L, and extends downward from the front portion. The right mounting plate 236 is fixed to the front part of the support frame member 232R, and extends downward from the front part. The left connecting rod 237 is fixed to the left rear end of the front rod 235 and the lower end of the left mounting plate 236 by bolts. The right connecting rod 237 is fixed to the right rear end of the front rod 235 and the lower right end of the right mounting plate 236 by bolts.

  As shown in FIGS. 4 and 5, the second height changing device 28 has a second cover cylinder 43, a second screw rod 44, a second movable rod 45, and a second operation handle 46. The upper part of the second cover cylinder 43 is pivotally supported by the mast 25. The second screw rod 44 is provided inside the second cover cylinder 43, and is rotatable around the axis by a second operation handle 46. The second movable rod 45 is inserted into the second cover cylinder 43 from the lower end of the second cover cylinder 43, and the upper end is screwed to the second screw rod 44. The lower end of the second movable rod 45 is pivotally supported by a bracket plate 47 fixed to the connecting rod 32U.

  When the second operation handle 46 is operated to rotate the second screw rod 44, the second movable rod 45 moves forward or backward with respect to the second screw rod 44. When the second movable rod 45 moves forward, the second movable rod 45 projects from the second cover cylinder 43. When the second movable rod 45 moves backward, the second movable rod 45 enters into the second cover cylinder 43. As a result, the second height changing device 28 expands and contracts, and the support frame 26 (rear frame 30) swings up and down, so that the height of the gauge wheels 27L and 27R can be changed. By changing the height of the gauge wheels 27L and 27R, the height of the ground work machine 2 (the height of the tilling unit 18) is changed, and the tilling depth can be changed.

  The second height changing device 28 can change the height of the ground work machine 2 independently of changing the height of the transplant frames 69A and 69B by the first height changing device 50 described later. In other words, the height of the ground work machine 2 can be changed by the second height changing device 28 without changing the height of the transplant frames 69A and 69B by the first height changing device 50. Further, the height of the transplant frames 69A and 69B can be changed by the first height changing device 50 without changing the height of the ground work machine 2 by the second height changing device 28.

  As shown in FIGS. 1 to 3, the transplanter 3 includes a plurality of mounting frames 48 </ b> L and 48 </ b> R, a toolbar 49, a first height changing device (connecting member) 50, and a plurality of transplant units 51 </ b> A and 51 </ b> B. Have. The plurality of attachment frames 48L, 48R include a first attachment frame 48L and a second attachment frame 48R that is a frame different from the first attachment frame 48L. The plurality of transplant units 51A and 51B include a first transplant unit 51A and a second transplant unit 51B. The toolbar 49 is mounted over the first mounting frame 48L and the second mounting frame 48R. The first transplant unit 51A and the second transplant unit 51B are attached to the toolbar 49. The toolbar 49 is connected to the second support frame 232 by the first height changing device 50.

  The first attachment frame 48L is arranged on the left part of the transplanter 3 and extends rearward from the left part of the rotary tiller 2. The first attachment frame 48L has a first member 52, a second member 53, and a third member 239. The front end of the first member 52 is removably attachable to the upper part of the transmission case 14, and is rotatably supported around a horizontal axis (axis in the width direction K2) in the mounted state. The first member 52 extends rearward from the upper portion of the transmission case 14. The second member 53 has an upper portion connected to a rear end of the first member 52 and extends downward from the rear end. The vertical middle part of the second member 53 and the vertical middle part of the vertical frame member 33L are connected by a connecting member 297L. The third member 239 has a front end connected to the lower end of the second member 53, and extends rearward from the lower end. The third member 239 extends above the horizontal frame member 34C and extends rearward of the horizontal frame member 34C.

  The second mounting frame 48 </ b> R is disposed on the right part of the transplanter 3 and extends rearward from the right part of the rotary tiller 2. The second mounting frame 48R has a fourth member 54, a fifth member 55, and a sixth member 240. The front end of the fourth member 54 is removably attachable to the upper part of the side frame 15, and is rotatably supported around the horizontal axis in the attached state. The fourth member 54 extends rearward from the upper portion of the side frame 15. The fifth member 55 has an upper portion connected to the rear end of the fourth member 54 and extends downward from the rear end. The middle part in the vertical direction of the fifth member 55 and the middle part in the vertical direction of the vertical frame member 33R are connected by a connecting member 297R. The sixth member 240 has a front end connected to a lower end of the fifth member 55 and extends rearward from the lower end. The sixth member 240 extends above the horizontal frame member 34C and extends rearward of the horizontal frame member 34C.

  The toolbar 49 is formed of a square pipe, and is mounted between the rear of the first mounting frame 48L and the rear of the second mounting frame 48R. Specifically, the toolbar 49 is provided from the rear end of the third member 239 to the rear end of the sixth member 240. One end (left side) of the toolbar 49 is detachably attached to the rear end of the third member 239. The other end (right side) of the toolbar 49 is detachably attached to the rear end of the sixth member 240.

  The first height changing device 50 is a device (member) that changes the height of the transplant frame (described later) with respect to the ground work machine 2 by changing the height of the toolbar 49. In other words, the first height changing device 50 is a device (member) that changes the height of the plurality of transplant units 51A and 51B to change the implantation depth of an implantation device described later. The planting device is a device for planting seedlings in ridges (fields).

As shown in FIGS. 5, 16, and 17, the first height changing device 50 includes a support bracket 56, a telescopic rod 57, and a first operation handle 58.
The support bracket 56 has a bracket body 60, mounting plates 59L, 59R, 59U, mounting stays 61L, 61R, and support stays 238L, 238R. The lower end of the bracket body 60 is connected to a middle part of the second connection frame member 232B in the width direction K2, and extends upward from the lower end. A front portion of a mounting plate 59L is fixed to a left portion of an upper end of the bracket body 60. The front part of the mounting plate 59R is fixed to the right part of the upper end of the bracket body 60. The lower surface of the mounting plate 59U is fixed to the upper end of the bracket body 60, the upper end of the mounting plate 59L, and the upper end of the mounting plate 59R. A front portion of the mounting stay 61L is fixed to the mounting plate 59L with bolts. A front portion of the mounting stay 61R is fixed to the mounting plate 59R with bolts. The front end of the support stay 238L is fixed to the left part of the mast 25. The rear end of the support stay 238L is fixed to the left surface of the bracket main body 60 in the middle part in the vertical direction. The front end of the support stay 238R is fixed to the right part of the mast 25. A rear end of the support stay 238R is fixed to a right surface of the bracket body 60 in the middle in the vertical direction. The support stays 238L and 238R penetrate the case 233A of the operation unit 233 in the front-rear direction.

  The telescopic rod 57 has a first cover cylinder 63, a first screw rod 64, and a first movable rod 65. The upper part of the first cover cylinder 63 is disposed between the mounting stay 61L and the mounting stay 61R. The upper part of the first cover cylinder 63 is rotatably supported by the mounting stay 61L and the mounting stay 61R so as to be rotatable around the horizontal axis. The first screw rod 64 is provided inside the first cover cylinder 63, and is rotatable around the axis by the first operation handle 58. The first movable rod 65 is inserted into the first cover cylinder 63 from the lower end of the first cover cylinder 63, and is screwed to the first screw rod 64. The lower end of the first movable rod 65 is inserted between the mounting piece 66L and the mounting piece 66R. The lower end of the first movable rod 65 is pivotally supported by the mounting pieces 66L, 66R by a support pin 67 that penetrates the first movable rod 65 and the mounting pieces 66L, 66R. The attachment piece 66L and the attachment piece 66R are fixed at an interval near the center of the upper surface of the toolbar 49 in the width direction K2.

  The first operation handle 58 is pivotally supported on an upper portion of the first screw rod 64 via a horizontal shaft 58a. When using the first operation handle 58, the first operation handle 58 is rotated upward about the horizontal axis 58a as a fulcrum (center) as shown by a virtual line (two-dot chain line) in FIG. Thus, the first operation handle 58 can be rotated around the axis of the first screw rod 64. Since the first operation handle 58 is at the position indicated by the solid line in FIG. 16 when not in use, it does not get in the way. When the second operation handle 46 is used, it is similarly rotated upward from the position shown in FIG.

  When the first operation handle 58 is operated to rotate the first screw rod 64, the first movable rod 65 moves forward or backward with respect to the first screw rod 64. When the first movable rod 65 moves forward, the first movable rod 65 protrudes from the first cover cylinder 63. When the first movable rod 65 moves backward, the first movable rod 65 enters into the first cover cylinder 63. Therefore, by rotating the first operation handle 58, the telescopic rod 57 expands and contracts, the first mounting frame 48L and the second mounting frame 48R swing up and down, and the toolbar 49 moves up and down. When the toolbar 49 moves up and down, the first transplant unit 51A and the second transplant unit 51B move up and down. When the first transplanting unit 51A and the second transplanting unit 51B move up and down, the heights of the planting devices 68A and 68B provided in the first transplanting unit 51A and the second transplanting unit 51B are changed, and the seedlings are planted. The depth is changed.

Next, the transplant units 51A and 51B will be described.
First, the schematic configuration of the transplant units 51A and 51B will be described.
As shown in FIGS. 2, 3, and 18, the first transplant unit 51 </ b> A is disposed on the right side of the transplant machine 3. The first transplant unit 51A includes a transplant frame (also referred to as a first transplant frame) 69A, a first transmission shaft 70A, an electric motor (motor) 71, a planting device (also referred to as a first planting device) 68A, , A seedling supply device (also referred to as a first seedling supply device) 72A and a plurality of earth covering rings 74A. The first transplant frame 69A is detachably attached to the right part of the toolbar 49. The first planting device 68A, the first seedling supply device 72A, and the plurality of earth covering rings 74A are provided on the first transplant frame 69A.

  The second transplant unit 51B is a transplant unit provided in parallel with the first transplant unit 51A in the width direction K2, and is arranged on the left part of the transplant machine 3. The second transplant unit 51B includes a transplant frame (also referred to as a second transplant frame) 69B, a second transmission shaft 70B, a planting device (also referred to as a second planting device) 68B, and a seedling supply device (second seedling). (Also referred to as a supply device) 72A and a plurality of earth covering rings 74B. The second transplant frame 69B is detachably attached to the left part of the toolbar 49. The second planting device 68B, the second seedling supply device 72A, and the plurality of soil covers 74B are provided on the second transplant frame 69B.

A transplanter frame 75 is composed of the first mounting frame 48L, the second mounting frame 48R, the toolbar 49, the first transplant frame 69A, and the second transplant frame 69B. The transplanter frame 75 is vertically movably attached to the rotary tiller 2 (ground work machine).
Next, the transplant frames 69A and 69B will be described. The transplant frames 69A and 69B are provided behind the ground work machine 2. First, the first transplant frame 69A, which is the transplant frame of the first transplant unit 51A, will be described.

As shown in FIGS. 19 to 21, the first transplantation frame 69 </ b> A has a frame attachment portion (attachment portion) 76, a main frame 77, and a planting frame 78.
The frame attachment portion 76 is a portion attached to the toolbar 49, and has an attachment plate 79 and a plurality of attachments 80L and 80R. In the present embodiment, the number of the attachments is two (the first attachment 80L on the left and the second attachment 80R on the right), but an additional attachment is provided between the first attachment 80L and the second attachment 80R. It may be provided. In the present embodiment, the mounting plate 79 has a substantially rectangular shape, and is arranged with the long side facing the width direction K2 and the short side facing the vertical direction. The front surface of the mounting plate 79 contacts the rear surface of the toolbar 49. The mounting plate 79 has through holes near four corners. The attachments 80L and 80R are formed by bending a metal rod, and include an upper rod 80U, a lower rod 80D, and a front rod 80F. The upper bar portion 80U extends in the front-rear direction, and contacts the upper surface of the toolbar 49. The lower bar portion 80D extends in the front-rear direction, and contacts the lower surface of the toolbar 49. Screw portions are formed at the rear end of the upper rod portion 80U and the rear end of the lower rod portion 80D, respectively. The front bar portion 80F extends in the up-down direction and contacts the front surface of the toolbar 49. The front bar 80F connects the front end of the upper bar 80U and the front end of the lower bar 80D. The upper rod portion 80U and the lower rod portion 80D penetrate through a through hole formed in the mounting plate 79, and a screw portion at the rear end projects rearward of the mounting plate 79. The attachment 80 is attached to the tool bar 49 by screwing the nuts 100 to the threaded portions of the upper rod portion 80U and the lower rod portion 80D, respectively. Thus, the frame attaching section 76 is attached to the toolbar 49.

  The planting frame 78 shown in FIG. 20 is a frame to which the first planting device 68A is attached. The planting frame 78 includes a first vertical member 92, a second vertical member 93, a third vertical member 94, a fourth vertical member 95, a fifth vertical member 96, a first horizontal member 97, and a second It has a horizontal member 98, a first connecting member 241, a second connecting member 242, a third connecting member 243, a fourth connecting member 244, a fifth connecting member 245, and a central member 247.

The central member 247 extends in the front-rear direction through a central portion in the width direction K2 of the planting frame 78 (an intermediate point between the two attachments 80). The center member 248 is arranged above the toolbar 49 and extends in a direction (front-back direction) orthogonal to the toolbar 49.
The first horizontal member 97 is disposed above the central member 248 and extends in a direction perpendicular to the central member 248 (width direction K2). A fixed plate 249R is fixed to a lower surface near the center of the first horizontal member 97 in the extending direction (width direction K2), and extends downward from the lower surface. Two fixing plates 249 are provided at intervals in the width direction K2. The front part of the center member 248 is fixed between the two fixing plates 249.

The second horizontal member 98 is arranged behind the first horizontal member 97 and parallel to the first horizontal member 97. The second horizontal member 98 is disposed above the central member 248 and extends in a direction perpendicular to the central member 248 (width direction K2).
The upper end of the first vertical member 92 is fixed to the left portion of the lower surface of the first horizontal member 97, and extends downward from the left portion. The lower part of the first vertical member 92 is fixed to the left part of the mounting plate 79. The upper end of the second vertical member 93 is fixed to the right portion of the lower surface of the first horizontal member 97, and extends downward from the right portion. The lower part of the second vertical member 93 is fixed to the right part of the mounting plate 79. The third vertical member 94 is arranged between the first vertical member 92 and the second vertical member 93. The upper end of the third vertical member 94 is fixed to the center of the lower surface of the first horizontal member 97 in the width direction K2, and extends downward from the center.

  The fourth vertical member 95 is arranged behind the second vertical member 93. The fourth vertical member 95 has an upper end fixed to the right portion of the lower surface of the second horizontal member 98, and extends downward from the right portion. The fifth vertical member 96 is arranged behind the third vertical member 94 and to the left of the fourth vertical member 95. The upper end of the fifth vertical member 96 is fixed to the center of the lower surface of the second horizontal member 98 in the width direction K2, and extends downward from the center.

  The first connecting member 241 connects the first vertical member 92 and the third vertical member 94. The second connecting member 241 connects the first vertical member 92 and the third vertical member 94 below the first connecting member 241. The third connecting member 243 connects the fourth vertical member 95 and the fifth vertical member 96. The fourth connecting member 244 connects the fourth vertical member 95 and the fifth vertical member 96 below the third connecting member 243. The fifth connecting member 245 connects the second vertical member 93 and the fourth vertical member 95.

The main frame 77 is a frame to which the first seedling supply device 72A and the plurality of earth covering rings 74A are attached. The main frame 77 has first to eleventh frame members 81 to 91. The first frame member 81 to the eleventh frame member 91 are formed of square pipe members.
The first frame member 81 is fixed to a central portion of the rear surface of the mounting plate 79 in the width direction K2, and extends rearward from the central portion. The second frame member 82 has a front portion fixed to the left end of the first horizontal member 97 and extends rearward from the left end. The third frame member 83 has a front portion fixed to the right end of the first horizontal member 97 and extends rearward from the right end. A support member 250 is provided in the front and rear halfway of the second frame member 82 so as to protrude downward. A support member 251 is provided in the front and rear halfway of the third frame member 83 so as to protrude downward. The support member 250 is located forward of the second horizontal member 98, and the support member 251 is located rearward of the second horizontal member 98.

The fifth frame member 85 is disposed in front of the second horizontal member 98, and connects the lower part of the support member 250 and the central member 247. The sixth frame member 86 is arranged behind the second horizontal member 98, and connects the lower part of the support member 251 and the central member 247.
The seventh frame member 87 connects the first frame member 81 and the central member 247. Specifically, the upper end of the seventh frame member 87 is fixed to the central member 247, and the lower end is fixed to the first frame member 81.

  The eighth frame member 88 extends in the width direction K2, and connects the vicinity of the rear end of the second frame member 82 and the vicinity of the rear end of the third frame member 83. A fixed plate 251 is fixed to a lower surface near the center of the eighth frame member 88 in the extending direction (width direction K2), and extends downward from the lower surface. Two fixing plates 251 are provided at intervals in the width direction K2. The rear part of the center member 248 is fixed between the two fixing plates 251.

  The ninth frame member 89 has an upper end fixed to a position near the rear of the lower surface of the second frame member 82, and extends downward from this position. The tenth frame member 90 has an upper end fixed at a position near the rear end of the lower surface of the central member 247, and extends downward from the position. The eleventh frame member 91 has an upper end fixed to the rear end of the lower surface of the third frame member 83, and extends downward from the rear end.

The transplant frame 69A has a left frame support portion 73AL and a right frame support portion 73AR.
The frame support portion 73AL extends in the width direction K2, and is attached across the seventh frame member 87 and the ninth frame member 89. The right end of the frame support portion 73AL is fixed to the seventh frame member 87. An intermediate portion of the frame support portion 73AL in the width direction K2 is fixed to the ninth frame member 89. The left end of the frame support portion 73AL protrudes leftward from the ninth frame member 89. The left soil covering ring 74AL is attached to the frame support portion 73AL via a soil covering frame 400AL described later.

  The frame support portion 73AR extends in the width direction K2 behind the frame support portion 73AL, and is attached across the tenth frame member 90 and the eleventh frame member 91. The left end of the frame support portion 73AR is fixed to the tenth frame member 90. An intermediate portion of the frame support portion 73AR in the width direction K2 is fixed to the eleventh frame member 91. The right end of the frame support portion 73AL projects rightward from the eleventh frame member 91. The right earth covering ring 74AR is attached to the frame support portion 73AR via an earth covering frame 400AR described later.

Next, the second transplant frame 69B that is the transplant frame of the second transplant unit 51B will be described.
Similarly to the first transplant frame 69A, the second transplant frame 69B also has a frame mounting portion (mount portion) 76, a main frame 77, and a planting frame 78. The configurations of the frame mounting portion 76, the main frame 77, and the planting frame 78 are the same as the configurations described above, and thus the description will be omitted.

The second seedling supply device 72B and a plurality of earth covering rings 74B are attached to the main frame 77 of the second transplant frame 69B. The second implantation device 68B is attached to the implantation frame 78 of the second implantation frame 69B.
Next, the power transmission system of the first transplant unit 51A and the second transplant unit 51B will be described.

  As shown in FIG. 18, the first transmission shaft 70A of the first transplant unit 51A extends in the width direction K2, one end (left side) is supported by the first bearing 101, and the other end side (right side) is It is supported by two bearings 102. The first bearing 101 is attached to the third frame member 83. The second bearing 102 is attached to the central member 247. The right end side of the first transmission shaft 70A projects rightward (outward in the width direction) from the second bearing 102. The left end side of the first transmission shaft 70A protrudes leftward (inward in the width direction) from the first bearing 103.

  The second transmission shaft 70B of the second transplant unit 51B extends in the width direction K2, and the left end is supported by the third bearing 103 and the right end is supported by the fourth bearing 104. The third bearing 103 is attached to the central member 247. The fourth bearing 104 is attached to the second frame member 82. The left end side of the second transmission shaft 70B projects leftward (outward in the width direction) from the third bearing 103. The right end side of the second transmission shaft 70B protrudes inward (rightward) in the width direction from the fourth bearing 104.

The left end side of the first transmission shaft 70A and the right end side of the second transmission shaft 70B face each other and are detachably connected by a connection pipe (connection member) 105.
As shown in FIGS. 18, 22, and 23, the electric motor 71 is attached to an attachment plate 106A attached to the front of the first vertical member 92 and the third vertical member 94 in the first transplant unit 51A. . The electric motor 71 is provided with an output shaft 107. Above the output shaft 107, a second output shaft 253 is provided in parallel with the output shaft 107. The second output shaft 253 is supported by a support cylinder 254A. The support cylinder 254A holds a pair of bearings that support the second output shaft 253. The right end side of the support cylinder 254A is supported by a central member 247 (hereinafter, referred to as a central member 247A) in the first transplant unit 51A. The left end side of the support tube 254A is supported by a stay 255A fixed to the first vertical member 92 of the first transplant unit 51A.

  A third output shaft 261 is provided at the front of the second transplant unit 51B. The third output shaft 261 is supported by a support cylinder 254B. The support cylinder 254B holds a pair of bearings that support the third output shaft 261. The right end side of the support cylinder 254B is supported by a central member 247 (hereinafter, referred to as a central member 247B) in the second transplant unit 51B. The left end side of the support cylinder 254B is supported by a stay 255B fixed to the first vertical member 92 of the second transplant unit 51B.

  The output shaft 107 of the electric motor 71 is provided with a first sprocket 114. The second sprocket 115 is provided on the left end side of the second output shaft 253. A third sprocket 116 is provided on the right end side of the second output shaft 253. On the right side of the third sprocket 116, a fourth sprocket 117 is arranged. The fourth sprocket 117 is mounted on the mounting plate 106A via a bracket 258A. The rotation shaft of the fourth sprocket 117 and the second output shaft 253 are arranged in a direction orthogonal to each other, and are linked to each other by a gear mechanism 259A.

The first transmission shaft 70A includes a seventh sprocket 120, an eighth sprocket 121, and a ninth sprocket 122.
A support member 256A and a support member 257A are provided on the central member 247A of the first transplant unit 51A so as to protrude downward. A support member 256B and a support member 257B are provided on the central member 247B of the second transplant unit 51B so as to protrude downward. The support members 256A and 256B are provided between the third vertical member 94 and the fifth vertical member 96. The support members 257A and 257B are provided behind the fifth vertical member 96.

  The fifth sprocket 118 is provided on the support member 256A. The sixth sprocket 119 is provided on the support member 257A. A fifth bearing 272 is provided behind the support member 257A. The fifth bearing 272 is attached to the central member 247A. The fifth bearing 272 supports the third transmission shaft 260. The third transmission shaft 260 is provided with a tenth sprocket 123 and an eleventh sprocket 124.

  The twelfth sprocket 125 is provided on the right end side of the third output shaft 261 of the second transplant unit 51B. On the right side of the twelfth sprocket 116, a thirteenth sprocket 126 is arranged. The thirteenth sprocket 126 is mounted on the mounting plate 106B via a bracket 258B. The rotation shaft of the thirteenth sprocket 126 and the third output shaft 261 are arranged in a direction orthogonal to each other, and are interlocked and connected by a gear mechanism 259B.

  In the second transplant unit 51B, a fifteenth sprocket 264 is provided on the support member 256B. The support member 257B is provided with a sixteenth sprocket 265. A sixth bearing 262 is arranged behind the support member 257B. The sixth bearing 262 is attached to the central member 247B. The sixth bearing 262 supports the fourth transmission shaft 263. On the fourth transmission shaft 263, a seventeenth sprocket 266 and an eighteenth sprocket 267 are provided.

The second transmission shaft 70B is provided with a nineteenth sprocket 268, a twentieth sprocket 269, and a twenty-first sprocket 270.
The rotational power of the electric motor 71 is transmitted from the first sprocket 114 to the second sprocket 115 via the first chain 126, and the second output shaft 253 rotates. The power of the second output shaft 253 is transmitted from the third sprocket 116 to the fifth sprocket 118 and the seventh sprocket 120 via the second chain 127, and the first transmission shaft 70A rotates. The power of the second output shaft 253 is transmitted to the rotation shaft of the fourth sprocket 117 via the gear mechanism 259A, and the fourth sprocket 117 rotates.

  The power of the first transmission shaft 70A is transmitted from the eighth sprocket 121 to the sixth sprocket 119 and the tenth sprocket 123 via the third chain 128. The power transmitted to the tenth sprocket 123 is transmitted to the eleventh sprocket 124 via the third transmission shaft 260. Also, the power of the first transmission shaft 70A is transmitted from the ninth sprocket 122 to the later-described 22nd sprocket 271 (see FIG. 19) via the fourth chain 130. In addition, the power of the third transmission shaft 260 is transmitted from the eleventh sprocket 124 to the later-described twenty-third sprocket 274 (see FIG. 19) via the eighth chain 273. Further, the power of the first transmission shaft 70A is transmitted to the second transmission shaft 70B via the connection pipe 105.

  The power of the second transmission shaft 70B is transmitted from the nineteenth sprocket 268 to the fifteenth sprocket 264 and the twelfth sprocket 125 via the fifth chain 132. The power transmitted to the twelfth sprocket 125 is transmitted from the third output shaft 261 to the thirteenth sprocket 126 via the gear mechanism 259B. Further, the power of the second transmission shaft 70B is transmitted from the twentieth sprocket 269 to the seventeenth sprocket 266 via the sixth chain 134. The power transmitted to the seventeenth sprocket 266 is transmitted to the eighteenth sprocket 267 via the fourth transmission shaft 263. Further, the power of the second transmission shaft 70B is transmitted from the twenty-first sprocket 270 to the twenty-fourth sprocket 277 (see FIG. 19) via the seventh chain 136. The power of the fourth transmission shaft 263 is transmitted from the eighteenth sprocket 267 to the twenty-fourth sprocket 276 (see FIG. 19) via the ninth chain 275.

Next, the planting devices 68A and 68B will be described. First, the first implanting device 68A that is the implanting device of the first transplanting unit 51A will be described.
As shown in FIG. 24, the first planting device 68A has a plurality (two in the present embodiment) of planting mechanisms 68AL and 68AR. Hereinafter, the planting mechanism 68AL is referred to as a first planting mechanism 68AL, and the planting mechanism 68AR is referred to as a second planting mechanism 68AR. The first planting mechanism 68AL is a planting mechanism located on the left side. The second planting mechanism 68AR is a planting mechanism located on the right side. The first planting mechanism 68AL and the second planting mechanism 68AR are arranged side by side in the width direction K2. The first planting mechanism 68AL and the second planting mechanism 68AR are arranged at different positions in the front-rear direction K1. That is, the second planting mechanism 68AR is attached to the transplant frames 69A and 69B at a position different from the first planting mechanism AL in the front-back direction in parallel with the first planting mechanism AL. In the present embodiment, the second planting mechanism 68AR is arranged rearward of the first planting mechanism 68AL. However, even if the second planting mechanism 68AR is arranged ahead of the first planting mechanism 68AL. Good.

  As shown in FIGS. 19 and 24, the first planting mechanism 68AL includes a planting tool 137, a support 138, and an elevating device 139. The second planting mechanism 68AR has a planting tool 137, a support 138, and a lifting / lowering device 139, like the first planting mechanism 68AL. Hereinafter, the planting tool 137 of the first planting mechanism 68AL may be referred to as a first planting tool 137AL, and the planting tool 137 of the second planting mechanism 68AR may be referred to as a second planting tool 137AR. Further, the elevating device 139 of the first planting mechanism 68AL may be referred to as a first elevating device 139AL, and the elevating device 139 of the second planting mechanism 68AR may be referred to as a second elevating device 139AR.

  The planting tool 137 (the first planting tool 137AL, the second planting tool 137AR) is a member for planting a seedling on a ridge (field). The implant 137 has a beak shape with the tip directed downward, and has a front component 140 and a rear component 141. The implant 137 can be opened and closed by the front component 140 and the rear component 141 separating and approaching each other in the front-rear direction K1. In the closed state, the planting tool 137 can supply seedlings from above, and can store the seedlings inside. In addition, the planting tool 137 can release the seedling by dropping it downward in an open state.

  As shown in FIGS. 21 and 24, the support 138 of the first planting mechanism 68AL has a front portion fixed to the first connecting member 241 and the second connecting member 242 of the planting frame 78 with bolts. The support 138 of the second planting mechanism 68AR has a front portion fixed to the third connecting member 243 and the fourth connecting member 244 of the planting frame 78 with bolts. Here, the third connection member 243 and the fourth connection member 244 are located behind the first connection member 241 and the second connection member 242. Therefore, the support 138 in the second planting mechanism 68AR is located behind the support 138 in the first planting mechanism 68AL. Accordingly, the second planting mechanism 68AR is located behind the first planting mechanism 68AL. As shown in FIG. 19, the magnitude of the shift in the front-rear direction between the first planting mechanism 68AL and the second planting mechanism 68AR is such that the first planting tool 137AL and the second planting tool 137AR are at the bottom dead center. At some point, it is set so that it does not overlap in side view. The mounting position of each support 138 can be changed with respect to the planting frame 78 in the width direction K2. By changing the attachment position of the support 138, the interval between the planted seedlings (the interval in the width direction K2 of the planted seedlings) can be changed.

  In addition, as shown in FIG. 24, the two planting mechanisms 68AL and 68AR have a left vertical member (first vertical member 92, third vertical member 94) and a central vertical member (third vertical member) in the width direction. The member 94, the fifth vertical member 96) and the right vertical member (the fourth vertical member 95) are supported. That is, the vertical members at the center in the width direction (the third vertical member 94 and the fifth vertical member 96) support both the two planting mechanisms 68AL and 68AR. Thus, the two planting mechanisms (the first planting mechanism 68AL and the second planting mechanism 68AR) are supported at three locations (left, center, and right) in the width direction.

As shown in FIGS. 19 and 24, in the first transplantation unit 51A, the second sprocket 271 is supported by the support shaft 138 on the support 138 of the first implantation mechanism 68AL. The 23rd sprocket 274 is supported by the support shaft 138 on the support 138 of the second planting mechanism 68AR.
The lifting device 139 (the first lifting device 139AL, the second lifting device 139AR) is a device that supports the planting tool 137 and moves the planting tool 137 up and down. Specifically, the first elevating device 139AL is a device for elevating and lowering the first implant 137AL, and the second elevating device 139AR is an device for elevating and lowering the second implant 137AR. The elevating device 139 is attached to the support 138. The elevating device 139 has a first case 143, a second case 144, and a mounting member 145. The first case 143 is rotatably supported by a support 138 via a support shaft 142. The second case 144 is rotatably supported on the free end side of the first case 143. The attachment member 145 is supported by the second case 144. An implant 137 is supported by the mounting member 145. The attachment member 145 is provided with a seedling guide 146 located above the planting tool 137. The seedling guide 146 is formed in a downwardly tapered cylindrical shape, and guides the seedling supplied to the planting tool 137 from above to the planting tool 137. The mounting member 145 is urged upward by a spring.

  When the first case 143 is rotated by the support shaft 142, the first case 143 and the second case 144 are rotated such that the second case 144 rotates in the opposite direction to the first case 143 in conjunction with the rotation of the first case 143. A power transmission mechanism is provided therein. In addition, when the first case 143 and the second case 144 are rotated, the attachment member 145 moves up and down in parallel, and the planting tool 137 moves up and down.

  The seedling is dropped and supplied to the planting tool 137 at the raised position (top dead center position). At this time, the planting tool 137 is in a closed state, and the seedling is held inside the planting tool 137. After that, the planting tool 137 descends while holding the seedling, and the lower part of the planting tool 137 enters the ridge (field). When the planting tool 137 protrudes into the ridge, it opens to form a pit in the ridge and to release a seedling into the pit (plant a seedling).

As described above, the first planting mechanism 68AL and the second planting mechanism 68AR are arranged in the width direction K2 and at different positions in the front-back direction K1. In this way, two transplants of the seedlings are staggered on the ridge by one transplanting unit (one of the seedlings adjacent to each other in the width direction K2 is displaced forward or backward with respect to the other).
The first planting mechanism 68AL and the second planting mechanism 68AR are arranged at different positions in the front-rear direction K1, and the first planting mechanism 68AL and the second planting mechanism 68AR are supported at three places in the width direction. Accordingly, the first planting mechanism 68AL and the second planting mechanism 68AR can be arranged close to each other in the width direction K2. Therefore, it is possible to plant a seedling with a reduced inter-row distance. In addition, since the width (length in the width direction K2) of the transplant frame 69A to which the first planting mechanism 68AL and the second planting mechanism 68AR are attached can be reduced, the working machine 4 can be compactly arranged in the width direction K2. It becomes possible to configure.

  In the present embodiment, the left and right implants 137 (the first implant 137AL and the second implant 137AR) move up and down at the same time. When the implant 137 stops, the left and right implants 137 stop at the top dead center position. In order to perform inter-stock control, the implant 137 must be stopped. However, if the implant 137 is stopped at an intermediate position in the vertical movement range, a problem may occur. For example, when planting hard vegetable seedlings such as tomatoes and peppers, if the planting tool 137 stops at an intermediate position in the vertical movement range, the planting tool 137 hits the stem of the planted seedling and the seedling falls. There is a risk. In the present embodiment, the first planting tool 137AL and the second planting tool 137AR are shifted back and forth, and the first planting tool 137AL and the second planting tool 137AR are simultaneously moved up and down to realize staggered planting. Therefore, the implant 137 (the first implant 137AL and the second implant 137AR) can be stopped at the top dead center position. Thereby, the fall of the seedling can be prevented.

A mechanism for stopping the first planting tool 137AL and the second planting tool 137AR at the top dead center position (hereinafter, referred to as a planting tool stopping mechanism 285) will be described.
As shown in FIG. 22 and FIG. 23, the implanting device stopping mechanism 285 includes a mounting member 286, a support rod 287, nuts 288U and 288D, a swinging member 289, a support shaft 290, a roller 291, a spring 292, and a cam 293. doing. The attachment member 286 is fixed near the front end of the central member 247A. A through hole is formed in the attachment member 286, and a support rod 287 is vertically inserted into the through hole. The support rod 287 has a threaded portion 287a on one end and a locking hole 287b on the other end. Nuts 288U and 288D are screwed into the screw portion 287a of the support rod 287. The nut 288U contacts the upper surface of the mounting member 286, and the nut 288D contacts the lower surface of the mounting member 286. By sandwiching the attachment member 286 between the nut 288U and the nut 288D, the support rod 287 is attached to the attachment member 286. By moving the nut 288U and the nut 288D with respect to the screw portion 287a and changing the vertical position of the support rod 287 with respect to the mounting member 286, the vertical position of the locking hole 287b can be changed. The urging force of the spring 292 can be adjusted by changing the vertical position of the locking hole 287b. One end side (front end side) of the swing member 289 is pivotally supported by a bracket 258 </ b> A via a support shaft 290. The swing member 289 can swing up and down with the support shaft 290 as a fulcrum (center). On the other side (rear end side) of the swing member 289, a locking hole 289a is provided. A roller 291 is rotatably mounted between one end and the other end of the swing member 289. One end of the spring 292 is locked in the locking hole 287b of the support rod 287, and the other end is locked in the locking hole 289a of the swinging member 289. The cam 293 is attached to the second output shaft 253, and rotates together with the second output shaft 253. The cam 293 has an arc-shaped concave portion 293a on the outer periphery. Due to the biasing force of the spring 292, a force (see arrow A in FIG. 22) is applied to the swing member 289 by using the support shaft 290 as a fulcrum (center). With this force, the roller 291 is pressed against the outer periphery of the cam 293.

  When the electric motor 71 stops, the roller 291 rotates in the direction of arrow B in FIG. 22 while being pressed against the outer periphery of the cam 293 by the urging force of the spring 292. With the rotation of the roller 291, the cam 293 rotates in the opposite direction to the roller 291 (the direction of arrow C in FIG. 22). When the roller 291 and the cam 293 rotate in directions opposite to each other, the roller 291 moves along the outer periphery of the cam 293. After moving along the outer circumference of the cam 293, the roller 291 fits into the concave portion 293a and stops moving. When the movement of the roller 291 stops, the rotation of the cam 293 stops. Thus, the rotation of the second output shaft 253 stops, and the movement of the first implant 137AL stops. Therefore, the first planting is performed by appropriately setting the relationship between the position of the concave portion 293a (the position on the outer periphery of the cam 293) and the vertical positions of the first planting device 137AL and the second planting device 137AR in advance. The implement 137AL and the second implant 137AR can be stopped at the top dead center position.

  In addition, as shown in FIG. 22, the first planting device 68A has a lifting assist mechanism 294 that assists a lifting operation when the first planting device 137AL and the second planting device 137AR move up and down. . The lifting assist mechanism 294 includes a rotating plate 295 and a spring 296. The rotating plate 295 is attached to the first transmission shaft 70A, and rotates together with the first transmission shaft 70A. The spring 296 has one end locked to the rotating plate 295 and the other end locked to the central member 247A. The spring 296 expands and contracts as the first implant 137AL and the second implant 137AR move up and down as the first transmission shaft 70A rotates. Specifically, the spring 296 extends when the first implant 137AL and the second implant 137AR are lowered, and contracts when the first implant 137AL and the second implant 137AR are elevated. . Therefore, when the first planting device 137AL and the second planting device 137AR are lowered, the ascending operation is assisted by the urging force (tensile force) of the spring 296. Thus, a force (gravitational force) that assists the descending operation by its own weight acts on the first implanting device 137AL and the second implanting device 137AR by its own weight when descending, and a force that assists the ascending operation by the urging force of the spring 296 when ascending. Act, so that the elevating operation is performed smoothly.

Next, a second implanting device 68B, which is an implanting device of the second transplant unit 51B, will be described.
As shown in FIG. 24, the second planting device 68B also has a plurality (two in the present embodiment) of planting mechanisms 68BL and 68BR similarly to the first planting device 68A. The planting mechanisms 68BL and 68BR are arranged side by side in the width direction K2. Hereinafter, the planting mechanism 68BL is referred to as a first planting mechanism 68BL, and the planting mechanism 68BR is referred to as a second planting mechanism 68BR. The first planting mechanism 68BL is a planting mechanism located on the left side. The second planting mechanism 68BR is a planting mechanism located on the right side. The first planting mechanism 68BL and the second planting mechanism 68BR are arranged side by side in the width direction K2. The first planting mechanism 68BL and the second planting mechanism 68BR are arranged at different positions in the front-rear direction K1. In the present embodiment, the second planting mechanism 68BR is disposed rearward of the first planting mechanism 68BL. However, even if the second planting mechanism 68BR is disposed forward of the first planting mechanism 68BL. Good.

  The first planting mechanism 68BL, like the first planting mechanism 68AL, has a planting tool 137 (first planting tool 137BL), a support 138, and a lifting device 139 (first lifting device 139BL). . The second planting mechanism 68BR, like the second planting mechanism 68AR, has a planting tool 137 (second planting tool 137BR), a support 138, and a lifting device 139 (second lifting device 139BR). .

The implanter 137, the support 138, and the elevating device 139 have the same configuration as that described above, and a description thereof will be omitted. The second planting device 68B also has a planting tool stopping mechanism 285 and a lifting assist mechanism 294, like the first planting device 68A. The implanter stopping mechanism 285 and the lifting assist mechanism 294 have the same configuration as that described above, and a description thereof will be omitted.
As shown in FIGS. 19 and 24, in the second transplantation unit 51B, the twenty-fourth sprocket 277 is supported by the support shaft 138 of the support 138 of the first implantation mechanism 68BL. The 24th sprocket 276 is supported by the support shaft 138 on the support 138 of the second planting mechanism 68BR.

Next, the seedling supply devices 72A and 72B will be described. First, the first seedling supply device 72A that is the seedling supply device of the first transplant unit 51A will be described.
The first seedling supply device 72A is disposed above the first planting device 68A. The first seedling supply device 72A drops and supplies the seedlings to the planting tool 137 (first planting device 68A) located below. The first seedling supply device 72A is supported via a frame above the second frame member 82, the third frame member 83, the eighth frame member 88, and the first horizontal member 97 shown in FIG.

  As shown in FIG. 25, the first seedling supply device 72A has a number of supply cups 147 and 148 into which seedlings are put. The multiple supply cups 147 and 148 include multiple first supply cups 147 and multiple second supply cups 148. The first supply cup 147 and the second supply cup 148 are arranged along a loop path P that is long in the front-back direction. More specifically, the first supply cup 147 and the second supply cup 148 are arranged side by side in a loop so as to have a long oval shape in the front-rear direction K1 in plan view. Further, the first supply cups 147 and the second supply cups 148 are alternately arranged along an oblong arrangement path P.

  The first supply cup 147 and the second supply cup 148 are intermittently transferred in the arrow Y direction along a long loop-shaped path (elliptical arrangement path) P by the transfer mechanism 149. The transfer mechanism 149 includes a first rotating body 150, a second rotating body 151, and a cord 152. The first rotating body 150 and the second rotating body 151 are constituted by sprockets. The cord 152 is constituted by an endless chain. The first rotating body 150 and the second rotating body 151 are rotatably supported on a frame supporting the first seedling supply device 72A around a vertical axis (vertical axis). The first rotating body 150 is located in front of the transfer mechanism 149, and the second rotating body 151 is arranged behind the first rotating body 150. The cord 152 extends over the first rotator 150 and the second rotator 151. The first supply cup 147 and the second supply cup 148 are arranged on the outer peripheral side of the cord 152 along the cord 152.

A drive sprocket 153 is provided below the first rotating body 150. The drive sprocket 153 is integrally rotatably connected to the first rotating body 150 via a third drive shaft 154. Power is transmitted to the drive sprocket 153 via the ninth chain 155, and the first rotating body 150 rotates.
In the first transplant unit 51A, power is transmitted from the fourth sprocket 117 to the driving sprocket 153 via the ninth chain 155. In the second transplant unit 51B, power is transmitted from the thirteenth sprocket 126 to the drive sprocket 153 via the ninth chain 155.

  As shown in FIG. 26, the first supply cup 147 has a storage section 156, a mounting section 157, and a lid 158. Similarly, the second supply cup 148 includes a storage section 160, a mounting section 161, and a lid 162. The housing portions 156 and 160 are sites for housing the seedlings that have been thrown in, and are configured by a vertically open cylindrical body. The attachment parts 157 and 161 are parts to be attached to the cord 152. The lids 158 and 162 are members that close the bottoms of the housing sections 156 and 160. The lids 158 and 162 are pivotally supported by hinges 159 at the lower portions of the housing portions 156 and 160, and can open and close the lower end openings of the housing portions 156 and 160. When the lids 158 and 162 are closed, the seedlings can be held in the storage portions 156 and 160, and when the lids 158 and 162 are opened, the seedlings can be discharged downward from the storage portions 156 and 160.

  As shown in FIG. 27, the lid 158 of the first supply cup 147 has a first engagement portion 163. The lid 162 of the second supply cup 148 has a second engagement portion 164. The first engagement portion 163 protrudes on the inner peripheral side of the arrangement path (the cord 152) of the supply cups 147 and 148. The second engagement portion 164 protrudes on the outer peripheral side of the arrangement path (the cord 152) of the supply cups 147 and 148.

  The lid 158 of the first supply cup 147 is opened on the left side of the first rotating body 150 and the second rotating body 151 (one side in the width direction of the first rotating body 150 and the second rotating body 151). The position indicated by the reference sign X1 is a first opening position where the lid 158 of the first supply cup 147 is opened (an opening position on one side in the width direction of the first rotating body 150 and the second rotating body 151). The lid 158 of the second supply cup 148 is opened on the right side of the first rotating body 150 and the second rotating body 151 (the other side in the width direction of the first rotating body 150 and the second rotating body 151). The position indicated by reference sign X2 is a second open position where the lid 158 of the second supply cup 148 is opened (an open position on the other side in the width direction of the first rotating body 150 and the second rotating body 151).

  The first opening position X1 (opening position on one side in the width direction) and the second opening position X2 (opening position on the other side in the width direction) of the first seedling supply device 72A are set to different positions in the front-rear direction K1. . In the present embodiment, the second open position X2 is displaced rearward with respect to the first open position X1. In response to the second opening position X2 being displaced rearward with respect to the first opening position X1, the second planting mechanism 68AR of the planting device 68A is moved relative to the first planting mechanism 68AL. Is displaced backward.

Further, the lid 158 of the first supply cup 147 opens at the first open position X1, and the lid 164 of the second supply cup 148 opens at the second open position X2. Further, as described above, the first planting mechanism 68AL and the second planting mechanism 68AR that are displaced back and forth move up and down at the same time. In this way, staggered planting is realized.
The left implant 137 (first implant 137AL) of the implant device 68A is located below the first open position X1. The right implant 137 (second implant 137AR) of the implant device 68A is located below the second open position X2.

  The first seedling supply device 72A can set the open positions of the supply cups 147 and 148 to one side and the other side in the width direction of the first rotating body 150 and the second rotating body 151 (the first opening position X1, the second opening position). 2 opening position X2). The setting member 166 includes a plurality of regulating rods 167, 168, 169, 170. For convenience of explanation, the regulating rod 167 is a first regulating rod 167, the regulating rod 168 is a second regulating rod 168, the regulating rod 169 is a third regulating rod 169, and the regulating rod 170 is a fourth regulating rod. 170.

  The first regulating rod 167 contacts the lower surfaces of the lids 158 and 162 of the first supply cup 147 and the second supply cup 148 in front of the first open position X1 and the second open position X2. Therefore, the first regulating rod 167 regulates the opening of the lids 158 and 162 of the first supply cup 147 and the second supply cup 148 in front of the first open position X1 and the second open position X2. The second regulating rod 168 contacts the lower surfaces of the lids 158 and 162 of the first supply cup 147 and the second supply cup 148 on the rear side of the first open position X1 and the second open position X2. Therefore, the second regulating rod 168 regulates the opening of the lids 158 and 162 of the first supply cup 147 and the second supply cup 148 on the rear side of the first open position X1 and the second open position X2.

  The third regulating rod 169 is located on the left side of the first open position X1. The third regulating rod 169 contacts the lower surface of the second engaging portion 164 of the lid 162 at the first open position X1. This restricts the opening of the lid 162 of the second supply cup 148 at the first opening position X1. The fourth regulating rod 170 is located on the left side of the second open position X2. The fourth regulating rod 170 contacts the lower surface of the first engaging portion 163 of the lid 158 at the second open position X2. Thus, the opening of the lid 158 of the first supply cup 147 at the second opening position X2 is regulated.

The left rear end of the first regulating rod 167, the left front end of the second regulating rod 168, and the third regulating rod 169 constitute a first setting section 196 for setting the first open position X1. The right rear end of the first regulating rod 167, the right front end of the second regulating rod 168, and the fourth regulating rod 170 constitute a second setting section 197 for setting the second open position X2.
At the first opening position X1, the lid 158 of the first supply cup 147 is disengaged from the first regulating rod 167 and the second regulating rod 168, and the first engaging portion 163 is not supported by the third regulating rod 169. As a result, the lid 158 of the first supply cup 147 opens. At this time, the first planting tool 137AL has moved to the top dead center position, and the seedlings discharged from the first supply cup 147 are supplied to the first planting tool 137AL. When the first supply cup 147 is located at the first open position X1, the second supply cup 148 is located at the second open position X2. At the second opening position X2, the lid 162 of the second supply cup 148 is disengaged from the first regulating rod 167 and the second regulating rod 168, and the second engaging portion 164 is not supported by the fourth regulating rod 170. As a result, the lid 162 of the second supply cup 148 opens. At this time, the second planting tool 137AR has moved to the top dead center position, and the seedlings discharged from the second supply cup 148 are supplied to the second planting tool 137AR.

  When the second supply cup 148 is located at the first open position X1, the first supply cup 147 is located at the second open position X2. The second engaging portion 164 of the second supply cup 148 located at the first opening position X1 is regulated by the third regulating rod 169, and the lid 162 of the second supply cup 148 does not open. At this time, the first planting implement 137AL below the first opening position X1 moves downward to plant seedlings in the ridges. The first engagement portion 163 of the first supply cup 147 located at the second open position X2 is regulated by the fourth regulating rod 170, and the cover 158 of the first supply cup 148 does not open. At this time, the second planting implement 137AR below the second opening position X2 moves downward to plant a seedling in the ridge.

Next, the second seedling supply device 72B, which is the seedling supply device of the second transplant unit 51B, will be described.
The second seedling supply device 72B is arranged above the second planting device 68B. The second seedling supply device 72B drops and supplies the seedlings to the planting tool 137 (second planting device 68B) located below. The second seedling supply device 72B is supported above the second frame material 83, the third frame material 83, the eighth frame material 88, and the first horizontal member 97 via a frame, similarly to the first seedling supply device 72A. Have been.

The configuration of the second seedling supply device 72B is the same as the configuration of the first seedling supply device 72A, and a description thereof will be omitted.
The supply of the seedlings to the first supply cup 147 and the second supply cup 148 in the first seedling supply device 72A and the second seedling supply device 72B is performed by the first front chair 231R, the second front chair 231L, the first side chair 42R, This is performed by the workers H (see FIG. 7) seated on the respective second side chairs 42L.

  The first front chair 231R is located in front of (the first rotating body 150 of) the first seedling supply device 72A. The second front chair 231L is located in front of (the first rotating body 150 of) the second seedling supply device 72B. The first side chair 42R is located on one side (outward in the width direction) of the first seedling supply device 72A (the cord 152) in the width direction K2. The second side chair 42L is located on the other side (outward in the width direction) of the second seedling supply device 72B (the cord 152 thereof) in the width direction K2. Thereby, a worker sitting on the first front chair 231R and the first side chair 42R can supply seedlings to the first seedling supply device 72A. In addition, a worker sitting on the second front chair 231L and the second side chair 42L can supply seedlings to the second seedling supply device 72B. Therefore, the supply of the seedlings to the first seedling supply device 72A and the second seedling supply device 72B can be performed by a plurality of persons, respectively, and the work of supplying the seedlings can be performed efficiently.

  As shown in FIGS. 3 and 7, above the first seedling supply device 72A, a front seedling mount 278A and a lateral seedling for placing a seedling tray having a large number of seedlings to be supplied to the supply cups 147 and 148. A mounting table 279A is provided. The front seedling mounting base 278A and the side seedling mounting base 279A are attached to the frame of the first seedling supply device 72A. The front seedling mounting base 278A is provided above the front part of the first seedling supply device 72A, and is formed longer in the width direction K2 than in the front-rear direction K1. The front seedling mounting base 278A is inclined so as to become lower from the rear to the front. The side seedling mount 279A is provided above the rear of the first seedling supply device 72A, and is formed longer in the front-rear direction K1 than in the width direction K2. The side seedling mounting base 279A is inclined so as to become lower from the inside in the width direction to the outside in the width direction.

As shown in FIGS. 1, 3, and 7, a front seedling mounting base 278B and a side seedling mounting base 279B are also provided above the second seedling supply device 72B. The configurations of the front seedling mounting base 278B and the side seedling mounting base 279B are the same as those of the front seedling mounting base 278A and the side seedling mounting base 279A, and therefore description thereof is omitted.
As shown in FIGS. 1, 7, and 8, a seedling holder 280R is provided on one side (right side) in the width direction K2 of the ground working machine 2. On the other side (left side) in the width direction K2 of the ground working machine 2, a seedling holder 280L is provided. The seedling holders 280L and 280R include a substrate 281, a support 282, a support 283, and a support shaft 284.

  The substrate 281 of the seedling holder 280L is fixed to the rear end of the first member 52 of the first attachment frame 48L, and protrudes outward (leftward) in the width direction from the first member 52. The substrate 281 of the seedling holder 280R is fixed to the rear end of the fourth member 54 of the second attachment frame 48R, and protrudes outward (rightward) in the width direction from the fourth member 52. The support 282 has a lower end fixed to the substrate 281 and extends upward. A plurality of (four in the present embodiment) support tables 283 are provided. The plurality of support bases 283 are attached to the columns 282 at intervals in the vertical direction. The support base 283 is attached to the support column 282 via a support shaft 284, and is rotatable upward and inward in the width direction (the direction of arrow B in FIG. B) with the support shaft 284 as a fulcrum (center).

  A seedling tray having a large number of seedlings to be supplied to the supply cups 147 and 148 is placed on the support 283 of the seedling holders 280L and 280R. The seedling tray placed on the seedling holder 280L on the left side is empty when the seedling trays placed on the seedling trays 278B and 279B of the second seedling supply device 72B run out. Replaced with seedling tray. Seedling trays placed on the seedling holder 280R on the right side are empty when the seedling trays placed on the seedling trays 278A and 279A of the first seedling supply device 72A run out. Replaced with seedling tray.

  The first front chair 231R is arranged on the other side (left side) in the width direction K2 of the seedling placing portion 28R. The second front chair 231L is arranged on one side (right side) in the width direction K2 of the seedling placing portion 28L. Thereby, the worker sitting on the first front chair 231R can easily perform the operation of taking out the seedling tray placed on the seedling holder 28R. In addition, the worker sitting on the second front chair 231L can easily perform the operation of taking out the seedling tray placed on the seedling holder 28L.

Next, the earth covering wheels 74A and 74B will be described.
First, the earth covering ring 74A of the first transplant unit 51A will be described. As shown in FIGS. 2 and 3, the earth covering ring 74A includes a left earth covering ring 74AL and a right earth covering ring 74AR.
Two left soil covering rings 74AL are provided behind the left implantation mechanism 68AL in the first transplant unit 51A. Specifically, the two planting mechanisms 68AL are provided on one side (right side) and the other side (left side) of the eleventh frame 91 shown in FIG. Two right covering rings 74AR are provided behind the right planting mechanism 68AR in the first transplant unit 51A. Specifically, the two planting mechanisms 68AR are provided on one side (right side) and the other side (left side) of the ninth frame 89, respectively. The earth covering wheels 74AL and 74AR rotate the upper surface of the ridge, bring the soil to the root portion of the seedling planted by the first planting device 68A, cover the soil, and suppress the root portion of the seedling.

  As shown in FIG. 21, the covering soil ring 74AL is attached to the frame support portion 73AL of the transplant frame 69A. Specifically, the earth covering ring 74AL is attached to the frame support portion 73AL via the earth covering frame 400AL. The earth covering ring 74AR is attached to the frame support portion 73AR of the transplant frame 69A. More specifically, the earth covering ring 74AR is attached to the frame support portion 73AR via the earth covering frame 400AR. As shown in FIGS. 1 and 2, the earth covering ring 74AL and the earth covering ring 74AR are arranged at different positions in the front-rear direction K1. In the present embodiment, the earth covering ring 74AR is disposed behind the earth covering ring 74AL.

Next, the earth covering ring 74B of the second transplant unit 51B will be described. The earth covering ring 74B includes a left earth covering ring 74BL and a right earth covering ring 74BR.
In the second transplant unit 51B, two left soil covering rings 74BL are provided behind the left planting mechanism 68BL. Two right covering rings 74BR are provided behind the right planting mechanism 68BL in the second transplant unit 51B. The earth covering rings 74BL and 74BR rotate the upper surface of the ridge, bring the soil to the root portion of the seedling planted by the second planting device 68B, cover the soil, and suppress the root portion of the seedling.

  The earth covering ring 74BL is attached to the frame support portion 73BL of the transplant frame 69B. Specifically, the earth covering ring 74BL is attached to the frame support portion 73BL via the earth covering frame 400BL. The earth covering ring 74BR is attached to the frame support portion 73BR of the transplant frame 69B. More specifically, the earth covering ring 74BR is attached to the frame support portion 73BR via the earth covering frame 400BR. The earth covering wheels 74BL and 74BR are arranged at different positions in the front-rear direction K1. In the present embodiment, the earth covering ring 74BR is disposed behind the earth covering ring 74BL. The support structure of the earth covering rings 74BL and 74BR is the same as the support structure of the earth covering rings 74AL and 74AR.

The working machine 4 of the present embodiment includes a multi-film laying device 300 for laying a multi-film on a ridge. The multi-film laying device 300 includes a support frame 26, a film roll 301, a groove cutting member 302, a film press (film press section) 303, and a soil covering member 304.
The support frame 26 has the above-described configuration, and is mounted on the traveling body (tractor) 1. The film roll 301 is provided on the support frame 26, and the multi-film is wound around the axis of the support frame 26 in the width direction K2. The grooving member 302 forms an embedding groove for embedding the width direction end (the end in the width direction K2 of the support frame 26) of the multi-film unwound from the film roll 302 and laid on the ridge of the field in the field. Form. The film presser 303 presses both ends of the laid multi-film in the width direction K2. The soil covering member 304 covers the side edge of the multi-film held by the film presser 303 with soil, and covers the side edge with soil.

  The work machine 4 of the above embodiment is mounted on the rear part of the traveling body 1 and works on the field, the ground work machine 2, the transplant frames 69 </ b> A and 69 </ b> B provided behind the ground work machine 2, and Planting devices 68A and 68B for planting seedlings are provided, and the planting devices 68A and 68B are arranged in parallel with the first planting mechanisms 68AL and 68BL attached to the transplant frames 69A and 69B, and the first planting mechanisms 68AL and 68BL. And second transplanting mechanisms 68AR, 68BR attached to the transplant frames 69A, 69B at different positions in the front-rear direction from the first transplanting mechanism. Thereby, while running with one work machine 4, it is possible to plant seedlings with a reduced inter-row distance together with ground work (tiling, etc.). Further, the first planting mechanisms 68AL and 68BL and the second planting mechanisms 68AR and 68BR can be easily attached to the rear of the ground work machine 2 via the transplant frames 69A and 69B.

  The work machine 4 includes mounting frames 48L and 48R extending rearward from the ground work machine 2 and a toolbar 49 mounted on the mounting frames 48L and 48R. The transplant frames 69A and 69B are mounted on the toolbar 49. I have. Thus, the transplant frames 69A, 69B to which the first planting mechanisms 68AL, 68BL and the second planting mechanisms 68BL, 68BR are attached can be easily attached to the attachment frames 48L, 48R via the toolbar 49.

  In addition, the working machine 4 includes a plurality of supply cups 147 and 148 each having a storage section 160 for storing seedlings, a lid 158 provided below the storage section 160, and a plurality of supply cups 147 and 148. , 69B, and a transfer mechanism 149 for transferring along a loop-shaped path P passing through one side in the width direction and the other side in the width direction, and the open position of the cover 162 is set to one side in the width direction. (Left) a first open position X1, and a setting member 166 that can be set to a second open position X2 on the other side in the width direction (right) and different from the first open position X1 in the front-rear direction. The first planting mechanisms 68AL, 68BL are capable of rushing into a field and planting seedlings, have first planting tools 137AL, 137BL provided below the first opening position X1, and have second planting mechanisms 68AR. , 68BR Seedlings are capable planting and enters the field, it has a second planting tool 137AR provided below the second open position X2, the 137BR. Thus, only one seedling supply device is required to cope with two-row planting, and two seedling supply devices may be arranged in parallel to cope with four-row planting. For this reason, it is possible to provide a working machine that is compact in the width direction of the transplantation frame and that supports multiple rows.

  In addition, the work machine 4 includes a first elevating device 139AL that elevates and lowers the first implanters 137AL and 137BL, and a second elevating device 139AR that elevates and lowers the second implanters 137AR and 137BR. The raising and lowering of the first planting tools 137AL and 137BL by the 139AL and the raising and lowering of the second planting tools 137AR and 137BR by the second lifting / lowering device 139AR are performed simultaneously. This allows the first planting mechanisms 68AL, 68BL and the second planting mechanisms 68AR, 68BR to be displaced in the front-rear direction, thereby realizing staggered planting with a reduced distance between the strips.

  The stop position when the raising and lowering operation of the first planting tools 137AL and 137BL is stopped is the top dead center position of the first planting tools 137AL and 137BL, and the raising and lowering operation of the second planting tools 137AR and 137BR is performed. The stop position when stopping is the top dead center position of the second implants 137AR and 137BR. Thus, when the planting tool is stopped for controlling the plants, it is possible to prevent the planting tool from hitting the stem of the planted seedling and causing the seedling to fall.

  In addition, the working machine 4 uses the first height changing device 50 that can change the height of the transplant frames 69A and 69B with respect to the ground working machine 2 and the first height changing device 50 that changes the height of the ground working machine 2. A second height changing device that can be changed independently of the height of the transplant frames 69A and 69B. Thus, the operation of changing the height of the ground work machine 2 and the operation of changing the height of the transplant frames 69A and 69B with respect to the ground work machine 2 can be performed independently of each other. Therefore, the change of the planting depth of the seedlings by the first height changing device 50 can be performed independently of the change of the height of the ground work machine 2 by the second height changing device 28, so that the seedlings can be planted. Changing the depth is easy.

Moreover, since the ground work machine 2 is a rotary cultivator, transplanting work can be performed while cultivating with one work machine.
The transplanting machine 3 of the above-described embodiment includes transplanting frames 69A and 69B provided behind the ground working machine 2 that works on a field, and planting devices 68A and 68B that plant seedlings in the field. The devices 68A and 68B are arranged at the first implantation mechanisms 68AL and 68BL attached to the transplant frames 69A and 69B, and at positions different from the first implantation mechanisms in the front-rear direction in parallel with the first implantation mechanisms 68AL and 68BL. And second implantation mechanisms 68AR and 68BR attached to the transplant frames 69A and 69B. Thereby, it can be used together with the ground work machine 2 to perform ground work (tiling and the like) and planting of seedlings with a reduced inter-row distance. Further, the first planting mechanisms 68AL and 68BL and the second planting mechanisms 68AR and 68BR can be easily attached to the rear of the ground work machine 2 via the transplant frames 69A and 69B.

  The transplanter 3 includes mounting frames 48L and 48R extending rearward from the ground work machine 2 and a toolbar 49 mounted on the mounting frames 48L and 48R. The transplant frames 69A and 69B are mounted on the toolbar 49. I have. Thus, the transplant frames 69A, 69B to which the first planting mechanisms 68AL, 68BL and the second planting mechanisms 68BL, 68BR are attached can be easily attached to the attachment frames 48L, 48R via the toolbar 49.

  Further, the working machine 4 of the above embodiment is mounted on the rear part of the traveling body 1 and works on a field, and a plurality of working machines 4 arranged behind the ground working machine 2 and accommodating seedlings. Seedling supply devices 72A and 72B having a transfer mechanism 149 for transferring the supply cups 147 and 148 along a long loop path P back and forth, and provided below and supplied from the seedling supply devices 72A and 72B. Planting devices 68A and 68B for planting the obtained seedlings in the field, and front chairs 231L and 231R provided above the ground working machine 2 and in front of the seedling supply devices 72A and 72B and on which workers sit. Thus, the operator can sit on the front chairs 231L and 231R above the ground working machine 2 and supply seedlings to the seedling supply devices from the front of the seedling supply devices 72A and 72B. Accordingly, even when two seedling supply devices are arranged in the width direction of the traveling body 1 in order to cope with double-row planting, the working machine 4 does not become large in the width direction. Further, since the front chairs 231L and 231R are provided above the ground work machine 2, the work machine 4 can be prevented from being enlarged in the front-rear direction. Therefore, the operation of supplying seedlings to the seedling supply devices 72A and 72B can be performed efficiently with a compact configuration.

  Further, the work machine 4 is provided on one side in the width direction of the traveling body 1 of the seedling supply devices 72A and 72B, and is provided with the side chairs 42L and 42R on which the worker sits, thereby sitting on the front chairs 231L and 231R. The seedlings can be supplied to the seedling supply devices 72A and 72B by the worker who has performed and the worker sitting on the side chairs 42L and 42R. Thereby, it becomes possible for a plurality of persons to supply the seedlings to the seedling supply devices 72A and 72B, and the supply operation of the seedlings can be performed efficiently.

  The seedling supply devices 72A and 72B are disposed behind the ground work machine 2 and rotatably supported, and are disposed behind the first rotary member 150 and rotatably supported. It has a second rotating body 151, and a loop-shaped rope 152 that is bridged between the first rotating body 150 and the second rotating body 151, and the front chairs 231 </ b> L and 231 </ b> R are in front of the first rotating body 150. It is provided in. Thus, the front chairs 231L and 231R can be provided in front of the seedling supply devices 72A and 72B without hindering the driving of the seedling supply devices 72A and 72B.

  The seedling supply device includes a first seedling supply device 72A disposed on one side in the width direction, and a second seedling supply device 72B disposed on the other side in the width direction. A first front chair 231R provided in front of the first seedling supply device 72A, and a second front chair 231L provided in front of the second seedling supply device 72B. Thus, a worker sitting on the first front chair 231R can supply seedlings to the first seedling supply device 72A. In addition, a worker sitting on the second front chair 231L can supply seedlings to the second seedling supply device 72B. Therefore, it is possible to cope with double-row planting without increasing the size of the working machine in the width direction.

  The side chairs include a first side chair 42R provided on one side in the width direction of the first seedling supply device 72A and a second side provided on the other side in the width direction of the second seedling supply device 72B. And a chair 42L. Thereby, a worker sitting on the first side chair 42R can supply seedlings to the first seedling supply device 72A. In addition, a worker sitting on the second front chair 42L can supply seedlings to the second seedling supply device 72B. Therefore, it is possible to efficiently supply the seedlings to the seedling supply device in the working machine corresponding to the double-row planting.

  In addition, the working machine 4 includes a posture changing mechanism 214 that changes the posture of the side chairs 42L and 42R. The posture changing mechanism 214 changes the posture of the side chairs 42L and 42R, and the seat surface of the side chair is approximately. It can be changed to a horizontal first posture and a second posture inclined forward with respect to the first posture. Thus, the first position can be set when the side chairs 42L and 42R are used, and the second position can be set when the side chairs 42L and 42R are not used. Therefore, when the side chairs 42L and 42R are not used, the working machine 4 can be made compact in the width direction.

  The posture changing mechanism 214 holds the urging mechanism 215 for assisting the operation of changing the side chairs 42L and 42R from the first posture to the second posture, and holds the postures of the side chairs 42L and 42R in the second posture. And a holding mechanism 216. Therefore, when the worker changes the side chairs 42L, 42R from the first posture to the second posture, a necessary force is assisted by the urging mechanism 215, and the changing operation can be easily performed. In addition, the holding mechanism 216 can reliably hold the side chairs 42L and 42R in the second posture.

In addition, the work machine 4 includes a position adjusting mechanism that can adjust the position of the side chairs 42L and 42R in the width direction, thereby enabling the distance between the side chairs 42L and 42R and the seedling supply devices 72A and 72B to be adjusted. Can be adjusted according to the physique of the person.
The working machine 4 includes seedling holders 280L and 280R for placing seedlings supplied to the supply cups 147 and 148 on one side in the width direction of the ground working machine 2, and the front chairs 231L and 231R include seedlings. It is arranged on the other side in the width direction of the placing portions 280L and 280R. Thus, the worker sitting on the front chairs 231L and 231R can easily and efficiently take out the seedlings placed on the seedling holders 28L and 28R and supply them to the seedling supply devices 72A and 72B. .

  In addition, the work machine 4 includes an operation unit 233 for performing a setting operation regarding planting of seedlings above the ground work machine 2, and the front chairs 231 </ b> L and 231 </ b> R are located between the seedling holders 280 </ b> L and 280 </ b> R and the operation unit 233. Are located. Accordingly, the worker sitting on the front chairs 231L and 231R can perform the operation using the operation unit 233 by reaching inward in the width direction and forward in the seated state, so that the workability is very good. .

Moreover, since the ground work machine 1 is a rotary cultivator, it is possible to perform seedling planting work while tilling with one work machine.
The transplanting machine 3 of the above embodiment is disposed behind the ground working machine 2 that works on a field, and extends along a long loop-shaped path P back and forth through a large number of supply cups 147 and 148 that accommodate seedlings. A seedling supply device 72A, 72B having a transfer mechanism 149 for transferring, planting devices 68A, 68B provided below the seedling supply device 72A, 72B and planting seedlings supplied from the seedling supply device in a field; There are provided front chairs 231L and 231R, which are provided above the machine 2 and in front of the seedling supply devices 68A and 68B and on which workers sit. Thereby, by using together with the ground work machine 2, the worker sits on the front chairs 231L and 231R above the ground work machine 2 and transfers seedlings from the front of the seedling supply devices 72A and 72B to the seedling supply device. Supply can be made. Accordingly, even when two seedling supply devices are arranged in the width direction of the traveling body 1 in order to cope with double-row planting, the transplanter 3 does not become large in the width direction. Further, since the front chairs 231L and 231R are provided above the ground working machine 2, the transplanting machine 3 can be prevented from being enlarged in the front-rear direction. Therefore, the operation of supplying seedlings to the seedling supply devices 72A and 72B can be performed efficiently with a compact configuration.

  In addition, the transplanter 3 is provided on one side in the width direction of the traveling body of the seedling supply devices 72A and 72B, and is provided with the side chairs 42L and 42R on which the worker sits, thereby sitting on the front chairs 231L and 231R. The seedlings can be supplied to the seedling supply devices 72A and 72B by the worker who has performed and the worker sitting on the side chairs 42L and 42R. Thereby, it becomes possible for a plurality of persons to supply the seedlings to the seedling supply devices 72A and 72B, and the supply operation of the seedlings can be performed efficiently.

Next, the multi-film laying apparatus 300 will be described in detail.
As shown in FIG. 2 and FIG. 28A, the groove cutting member 302, the film presser 303 (film press section), and the soil covering member 304 are provided on the left and right sides of the support frame 26 (rear frame 30). The film roll 301 is provided from one side in the width direction K2 of the rear frame 30 to the other side. The left grooving member 302L is located in front of the left gauge wheel 27L and the left film presser 303L. The left covering member 304L is located behind the gauge wheel 27L and the film presser 303L. The right groove cutting member 302R is located in front of the right gauge wheel 27R and the right film presser 303R. The film presser 303L is located on the inner side K4 (right side) in the width direction of the gauge wheel 27L. The film presser 303R is located inside K4 (left side) in the width direction of the gauge wheel 27R. The right soil covering member 304R is located behind the gauge wheel 27R and the film presser 303R.

As shown in FIG. 37B, the gauge wheel 27 (supporting wheel) can roll between adjacent ridges R1 in the width direction K2 and press down the end of the multi-film F1 in the width direction K2. That is, the multi-film laying apparatus 300 includes the support wheel 27 that is arranged on the outer side K3 in the width direction of the film holding section 303 and can hold the end of the multi-film F1 in the width direction K2.
As shown in FIG. 28A, the multi-film laying apparatus 300 has a left first support 306L that supports the groove cutting member 302L so that the vertical position can be adjusted and the position can be adjusted in the width direction K2. In addition, the multi-film laying apparatus 300 has a right first support 306R that supports the groove cutting member 302R so that the vertical position can be adjusted and the position can be adjusted in the width direction K2. The first supports 306L and 306R are provided on the support frame 26 (the front part of the rear frame 30). In addition, the multi-film laying apparatus 300 has a left second support 346L that supports the film presser 303L so that the vertical position can be adjusted and the position can be adjusted in the width direction K2. In addition, the multi-film laying device 300 has a left second support 346R that supports the film presser 303R so that the vertical position can be adjusted and the position can be adjusted in the width direction K2. The second supports 346L and 346R are provided on the support frame 26 (the rear portion of the rear frame 30).

The first support 306L and the first support 306R have the same structure and are symmetrical. The second support 346L and the second support 346R have the same structure and are symmetrical. In the following description, the left first support 306L and the left second support 346L will be described in detail, and the detailed description of the right first support 306R and the right second support 346R will be omitted.
As shown in FIGS. 28B to 30, the first support 306 </ b> L includes a first member 307 provided with the groove cutting member 302, a second member 308 supporting the first member 307 so that the vertical position can be adjusted, and a first member 306 </ b> L. A third member 309 for supporting the two members 308 in a position adjustable in the width direction K2.

  As shown in FIG. 31, the first member 307 is located on the front side of the vertical frame member 35L and inward in the width direction K4. The first member 307 is formed of a bar having a square cross section. As shown in FIG. 33, the first member 307 is arranged vertically (up and down). A groove support shaft 310 is fixed to a lower end of the first member 307. The grooving support shaft 310 extends from the lower end of the first member 307 in an inclined direction that shifts rearward as it goes inward in the width direction K4.

  As shown in FIG. 31, a rotating member 311 is provided on the groove cutting support shaft 310 so as to be rotatable around the axis. A groove cutting member 302 is fixed to the inner side K4 of the rotating member 311 in the width direction so as to be integrally rotatable. The groove cutting member 302 is formed in a disk shape. Accordingly, accurate groove cutting can be performed even if the soil mass forming the ridge R1 is rough. The groove cutting member 302 is provided in an inclined shape that shifts outward in the width direction K3 as going backward. By moving the tractor 1 (movable traveling body) forward, the grooving member 302 causes the embedding groove 321 to move into the field H1 (between adjacent ridges R1 or ridge R1) in the working direction of the transplanter 3 (ridge R1). (Longitudinal direction) (see FIG. 37A).

  As shown in FIGS. 31 and 33, the second member 308 includes a cylindrical body (first cylindrical body) 313 through which the first member 307 is movably inserted in the longitudinal direction (longitudinal direction), and the first cylindrical body 313. And a fixture (first fixture) 314 for fixing the first member 307 to the first member 307. The first cylinder 313 is a cylinder whose top and bottom are open, and has a first wall 313a, a second wall 313b, a third wall 313c, and a fourth wall 313d. The first wall portion 313a and the second wall 313b are provided side by side at an interval in the width direction K2. The front ends of the first wall portion 313a and the second wall portion are connected by a third wall portion 313c. In the present embodiment, the first wall portion 313a, the second wall portion 313b, and the third wall portion 313c are formed in a channel shape that bends a single plate material and opens backward. The fourth wall 313d connects the rear ends of the first wall 313a and the second wall 313b. The fourth wall portion 313d is formed of a thick plate in the front and rear direction, and has a screw hole (first screw hole) 315 penetrating in the thickness direction. The screw hole is a hole in which a female screw is cut. The first fixture 314 is formed of, for example, a bolt, and is screwed into the first screw hole 315. The first member 307 is inserted between the first wall 313a and the second wall 313b and between the third wall 313c and the fourth wall 313d. The first member 307 is pressed against the third wall portion 313c by screwing (tightening) the first fixing member 314 into the first screw hole 315, and the first member 307 is fixed to the second member 308. You. In addition, the first member 307 can be moved up and down with respect to the second member 308 by screwing (relaxing) the first fixture 314 into the first screw hole 315. The tightening and loosening of the first fixing member 314 allows the first member 307 to be vertically adjusted with respect to the second member 308.

  As shown in FIGS. 31 and 33, the third member 309 is arranged on the front side of the second member 308. The third member 309 has a movable member (first movable member) 316 and a horizontal rod portion (first horizontal rod portion) 317 formed of a rod material long in the width direction K2. The second member 308 is fixed to the first movable member 316. The first horizontal rod portion 317 supports the first movable member 316 movably in the width direction K2 (longitudinal direction).

  As shown in FIGS. 31 and 33, the first movable member 316 includes a cylindrical body (second cylindrical body) 318 through which the first horizontal rod portion 317 is inserted, and a second cylindrical member with respect to the first horizontal rod portion 317. And a fixture (second fixture) 319 for fixing the body 318. The second cylindrical body 318 is a cylindrical body that is open on both sides in the width direction K2, and includes a first wall 318a, a second wall 318b, a third wall 318c, and a fourth wall 318d. . Second wall portions 318b are provided below the first wall portions 318a at intervals. The rear ends of the first wall portion 318a and the second wall portion 318b are connected by a third wall portion 318c. In the present embodiment, the first wall portion 318a, the second wall portion 318b, and the third wall portion 318c are formed in a channel shape that is formed by bending a single plate and opening forward. The third wall 313c of the first cylinder 313 is fixed to the third wall 318c of the second cylinder 318. The fourth wall 318d connects the front ends of the first wall 318a and the second wall 318b. The fourth wall portion 318d is formed of a thick plate in the front and rear direction, and has a screw hole (second screw hole) 320 penetrating in the thickness direction. The second fixture 319 is formed of, for example, a bolt, and is screwed into the second screw hole 320. The first horizontal rod portion 317 is inserted between the first wall portion 318a and the second wall portion 318b and between the third wall portion 318c and the fourth wall portion 318d. By screwing (fastening) the second fixing tool 319 into the second screw hole 320, the first horizontal rod portion 317 is pressed against the third wall portion 318c, and the first horizontal rod portion 317 is first movable by the first horizontal rod portion 317. The member 316 is fixed. Further, by screwing (relaxing) the second fixing member 319 into the second screw hole 320, the first movable member 316 can move in the width direction K2 with respect to the first horizontal rod portion 317. By the tightening and loosening of the second fixing member 319, the position of the first movable member 316 and the second member 308 can be adjusted in the width direction K2 with respect to the first horizontal rod portion 317.

As described above, by vertically adjusting the position of the first member 307 with respect to the second member 308, the position of the groove cutting member 302 is vertically adjusted. In addition, by adjusting the position of the first movable member 316 with respect to the first horizontal rod portion 317 in the width direction K2, the position of the second member 308 and the groove cutting member 302 is adjusted in the width direction K2.
As shown in FIG. 37A, by adjusting the position of the grooving member 302 in the up-down and width directions K2, the grooving member 302 is moved to the first grooving position P1, the second grooving position P2, and the third The position can be adjusted to the position P3. The first groove cutting position P1 is a position where the embedding groove 321 (321A) is formed at a corner R4 between the upper surface R2 and the side surface R3 of the ridge R1. The second groove cutting position P2 is a position where the embedded groove 321 (321B) is formed between the corner portion R4 and the lower end of the side surface R3. The third groove cutting position P3 is a position where the embedding groove 321 (321C) is formed between the adjacent ridges R1 in the width direction K2 (the bottom R5 of the groove between the ridges R1). Multi-films may have different film width dimensions. In the present embodiment, the grooving position of the grooving member 302 can be adjusted according to the width of the multi-film.

As shown in FIG. 30, a vertical rod portion 322 extending upward from the first horizontal rod portion 317 is provided at the outer end of the first horizontal rod portion 317 in the width direction K2. At the upper end of the vertical rod portion 322, a mounting portion 323 is provided. In other words, the first support 306L includes the vertical rod 322 and the attachment 323.
As shown in FIG. 31, the mounting portion 323 includes a first rod portion 323a extending rearward from the upper end of the vertical rod portion 322, and a second rod portion 323b extending inward in the width direction K4 from the rear end of the first rod portion 323a. And The second rod portion 323b is supported by a support portion (first support portion) 324 provided on the upper front side of the vertical frame member 35L. The first support 306L is attached to the rear frame 30 by the second rod 323b being supported by the first support 324.

  As shown in FIG. 31 and FIG. 33, the first support portion 324 includes a cylindrical body (third cylindrical body) 325 fixed to the vertical frame member 35L, and a second rod portion 323b (attachment portion) attached to the third cylindrical body 325. 323) (fixing tool (third fixing tool) 326). The third cylindrical body 325 is a cylindrical body that is open on both sides in the width direction K2, and has a first wall 325a, a second wall 325b, a third wall 325c, and a fourth wall 325d. . Second wall portions 325b are provided below the first wall portions 325a at intervals. The rear ends of the first wall portion 325a and the second wall portion 325b are connected by a third wall portion 325c. In the present embodiment, the first wall portion 325a, the second wall portion 325b, and the third wall portion 325c are formed in a channel shape that is formed by bending a single plate and opening forward. The third wall portion 325c is fixed to an upper portion of the front surface of the vertical frame member 35L. The fourth wall 325d connects the front ends of the first wall 325a and the second wall 325b. The fourth wall portion 325d is formed of a thick plate in the front and rear direction, and has a screw hole (third screw hole) 327 penetrating in the thickness direction. The third fixture 326 is formed of, for example, a bolt, and is screwed into the third screw hole 327. The second rod 323b is inserted between the first wall 325a and the second wall 325b and between the third wall 325c and the fourth wall 325d. By screwing (tightening) the third fixing member 326 into the third screw hole 327, the second rod portion 323b is pressed against the third wall portion 325c. Thus, the mounting portion 323 is fixed to the first support portion 324.

  As shown in FIGS. 28 to 30, the multi-film laying apparatus 300 can adjust the vertical position of the roll support shaft 328 that penetrates and supports the film roll 301 in the axial direction and the roll support shaft 328 (the film roll 301). And a roll support portion 329 for supporting the roller. The film roll 301 (multi-film) is formed to have a width extending in the width direction K2 of the ridge R1. The roll support shaft 328 is formed to have a length longer than the width of the film roll 301. The roll support 329 is provided on the left first support 306L and the right first support. The left roll support portion 329 supports the left side of the roll support shaft 328, and the right roll support portion supports the right side of the roll support shaft 328.

As shown in FIGS. 28 to 30, the roll supporting portion 329 is formed in a movable member (second movable member) 330 and in a rod shape long in the width direction K2, and can move the second movable member 330 in the width direction K2. (A second horizontal rod portion) 331, a stay member 332 fixed to the second movable member 330, and a shaft support member 333 attached to the stay member 332.
As shown in FIGS. 31 and 32, the second movable member 330 includes a cylindrical body (a fourth cylindrical body) 334 in which the second horizontal rod portion 331 is inserted and a fourth cylindrical member with respect to the second horizontal rod portion 331. And a fixture (fourth fixture) 335 for fixing the body 334. The fourth cylindrical body 334 is a cylindrical body that is open on both sides in the width direction K2, and has a first wall 334a, a second wall 334b, a third wall 334c, and a fourth wall 334d. . A second wall 334b is provided at an interval in front of the first wall 334a. The upper ends of the first wall portion 334a and the second wall portion 334b are connected by a third wall portion 334c. In the present embodiment, the first wall portion 334a, the second wall portion 334b, and the third wall portion 334c are formed in a channel shape that bends a single plate material and opens forward. The fourth wall portion 334d connects the lower ends of the first wall portion 334a and the second wall portion 334b. The fourth wall 334d is formed by a nut. The fourth fixing tool 335 is formed of, for example, a bolt, and is screwed to the fourth wall 334d. The second horizontal rod portion 331 is inserted between the first wall portion 334a and the second wall portion 334b and between the third wall portion 334c and the fourth wall portion 334d. By screwing (tightening) the fourth fixing member 335 with respect to the fourth wall portion 334d, the second horizontal rod portion 331 is pressed against the third wall portion 334c, and the second movable rod portion 331 is second movable by the second horizontal rod portion 331. The member 330 is fixed. Further, the second movable member 330 can be moved in the width direction K2 with respect to the second horizontal rod portion 331 by retreating (relaxing) the fourth fixing member 335 with respect to the fourth wall portion 334d. By the tightening and loosening of the fourth fixing member 335, the position of the second movable member 330 can be adjusted in the width direction K2 with respect to the first horizontal rod portion 317.

  As shown in FIGS. 31 and 32, the stay member 332 is fixed to the first wall 334a so as to project rearward. The stay member 332 has a first insertion hole 336 and a second insertion hole 337 formed behind the first insertion hole 336. The first insertion hole 336 is formed as a circular hole. The second insertion hole 337 is formed in an arc shape centered on the center of the first insertion hole 336. The second insertion hole 337 is a circular arc hole that is long in the vertical direction (up and down).

  As shown in FIGS. 31 and 32, the shaft support member 333 is formed of a long plate material in the front and rear directions. The front portion 333a of the shaft support member 333 is superposed on the surface on the K4 side in the width direction of the stay member 332, and is fixed by the first bolt 341A and the first nut 342A, and the second bolt 341B and the second nut 342B. ing. The rear portion 333b of the shaft support member 333 has a shaft support hole 338 formed by a circular hole. The roll support shaft 328 is inserted into and supported by the shaft support hole 338.

As shown in FIG. 32, a nut member is fixed to a rear portion 333b of the shaft support member 333, and a fixing bolt 344 is screwed to the nut member 343. The fixing bolt 344 is screwed to move toward the roll support shaft 328 to fix the roll support shaft 328. Further, the fixing bolt 344 is retracted with respect to the roll support shaft 328 by retreating.
As shown in FIG. 31, a third insertion hole 339 corresponding to the first insertion hole 336 and a fourth insertion hole 340 corresponding to the second insertion hole 337 are formed at a front portion of the shaft support member 333. I have. The first bolt 341A is inserted through the first insertion hole 336 and the third insertion hole 339. The first nut 342A is screwed to the first bolt 341A. The second bolt 341B is inserted through the second insertion hole 337 and the fourth insertion hole 340. The second nut 342A is screwed to the second bolt 341B. By loosening the first bolt 341A and the second bolt 341B, the shaft support member 333 can swing up and down. In addition, by tightening the first bolt 341A and the second bolt 341B, the shaft support member 333 is fixed at a position where the shaft support member 333 swings up and down. That is, the shaft support member 333 supports the roll support shaft 328 so that the vertical position can be adjusted. In other words, the first support 306L has the shaft support member 333 that supports the roll support shaft 328 so that the vertical position can be adjusted.

As shown in FIGS. 28 and 29, the second support 346L has a first frame 347 and a second frame 348. The first frame body 347 is supported by a support portion (second support portion) 349 fixed to the rear end of the rear member 38L so as to be vertically adjustable. The second frame body 348 is supported by the first frame body 347.
As shown in FIGS. 34 and 35, the second support portion 349 is formed of a plate material whose plate surface faces the width direction K2. The second support portion 349 is provided with a pivot pin 350 and an arc groove 351. The pivot pin 350 penetrates the second support portion 349 in the thickness direction (width direction K2), and protrudes from the second support portion 349 inward in the width direction K4. The arc groove 351 has an arc shape centered on the axis of the pivot pin 350 and is formed to be long in the vertical direction (up and down).

  As shown in FIGS. 34 and 35, the first frame body 347 is formed of a plate material whose plate surface faces up and down. The first frame body 347 has a first part 347a at the front, a second part 347b as an intermediate part, and a third part 347c at the rear. The first portion 347a is located inside the width direction K4 of the second support portion 349. A cylindrical boss 352 having an axis in the width direction K2 is fixed to a front end of the first portion 347a. The boss 352 is fitted around the pivot pin 350 so as to be rotatable around the axis and is prevented from being pulled out. A mounting shaft 353 is provided on the lower surface of the first portion 347a.

  As shown in FIG. 36, the mounting shaft 353 has a male screw portion 353a that passes through the arc groove 351. The male screw portion 353a has a nut 354 on the outer side K3 side of the second support portion 349 in the width direction. It is screwed. By loosening the nut 354, the first frame member 347 (second support member 346L) can swing up and down around the pivot pin 350. Further, by tightening the nut 354, the first frame body 347 (second support body 346L) is fixed at the position where the first frame body 347 is swung up and down. Thereby, the position of the first frame body 347 can be adjusted vertically. By vertically adjusting the position of the first frame body 347, the soil covering member 304 can be vertically adjusted.

As shown in FIG. 34, the second portion 347b extends in an inclining direction that shifts inward in the width direction K4 from the rear end of the first portion 347a toward the rear. The third portion 347c extends rearward from the rear end of the second portion 347b.
As shown in FIGS. 34 and 35, the second frame body 348 (the second support 346L) has a first support member 356 for supporting the film presser 303 so that the vertical position can be adjusted, and a first support member 356 having a width. And a second support member 357 for supporting the position in the direction K2 so as to be adjustable.

The second support member 357 will be described first. As shown in FIG. 35, the second support member 357 includes a support frame 358 that supports the first support member 356, and an attachment body 359 to which the support frame 358 is attached.
As shown in FIGS. 34 to 36, the support frame 358 includes a bracket plate 360, a mounting rod 361, and a stay plate 362. The bracket plate 360 is formed by bending a band plate material into an L shape, and has a vertical plate portion 360a and a horizontal plate portion 360b. The vertical plate portion 360a is formed to be long in the vertical direction (up and down). The horizontal plate portion 360b extends from the upper end of the vertical plate portion 360a inward in the width direction K4. The mounting rod 361 is fixed to the lower end of the vertical plate portion 360a. The mounting rod 361 is formed so as to protrude outward in the width direction K3 from the vertical plate portion 360a. The stay plate 362 is fixed to an end of the horizontal plate portion 360b in the protruding direction. The stay plate 362 is formed to project forward from the horizontal plate portion 360b.

  As shown in FIGS. 34 to 36, the attachment body 359 is fixed to the second portion 347b of the first frame body 347. The attachment body 359 has a cylinder (fifth cylinder) 363 and a fixture (fifth fixture) 364. The fifth cylinder 363 is a cylinder that is open on both sides in the width direction K2, and has a first wall 363a, a second wall 363b, a third wall 363c, and a fourth wall 363d. . A second wall 363b is provided at an interval in front of the first wall 363a. The lower ends of the first wall 363a and the second wall 363b are connected by a third wall 363c. The third wall portion 363c is fixed to the upper surface of the second portion 347b of the first frame body 347. In the present embodiment, the first wall portion 363a, the second wall portion 363b, and the third wall portion 363c are formed in a channel shape that is formed by bending a single plate material and opening upward. The fourth wall 363d connects the upper ends of the first wall 363a and the second wall 363b. The fourth wall portion 363d is formed by a thick plate vertically thick and has a screw hole (fifth screw hole) 365 penetrating in the thickness direction. The fifth fixing tool 364 is formed of, for example, a bolt, and is screwed into the fifth screw hole 365.

  The mounting rod 361 is inserted between the first wall 363a and the second wall 363b and between the third wall 363c and the fourth wall 363d. By screwing (tightening) the fifth fixing tool 364 into the fifth screw hole 365, the mounting rod 361 is pressed against the third wall 363c, and the support frame 358 is fixed to the mounting body 359. Further, by screwing (relaxing) the fifth fixing tool 364 into the fifth screw hole 365, the support frame 358 can move in the width direction K2 with respect to the attachment body 359. By tightening and loosening the fifth fixing tool 364, the position of the support frame 358 can be adjusted in the width direction K2. Thus, the position of the film presser 303 can be adjusted in the width direction K2.

  As shown in FIGS. 34 to 36, the first support member 356 includes a swing member 366, a support rod 367, and an urging member 368. The swing member 366 is formed of a long band plate material in the front and back. The swing member 366 has a tubular portion 369 at the rear. The cylindrical portion 369 is fitted around a pivot shaft 370 provided below the vertical plate portion 360a so as to be rotatable around its axis. The swing support shaft 370 projects from the vertical plate portion 360a inward in the width direction K4. The swing member 366 can swing up and down around the swing support shaft 370 at the front.

A rotation support shaft 371 is provided at the front of the swing member 366. The film holder 303 is rotatably supported by the rotation shaft 371. The film presser 303 is formed in a wheel shape, and presses the multi-film F1 while rolling on the multi-film F1 unwound from the film roll 301 (see FIG. 37B).
As shown in FIG. 36, the support rod 367 is formed by a rod, and has a vertically long vertical rod part 367a and a shaft part 367b extending outward from the lower end of the vertical rod part 367a in the width direction K3. The upper part of the vertical rod portion 367a penetrates the rotating member 372 in the vertical direction (up and down). The rotating member 372 is supported at the front part of the stay plate 362 so as to be rotatable around the axis in the width direction K2. The shaft portion 367b is inserted through an intermediate portion of the swing member 366 (between the swing support shaft 370 and the rotation support shaft 371).

  As shown in FIG. 36, a plurality of first pin holes 373 are formed in the longitudinal direction above the vertical rod portion 367a. First pins 374 such as beta pins are selectively inserted into the plurality of first pin holes 373. A washer 375 is provided between the first pin 374 and the rotating member 372. By inserting the first pin 374 into the other first pin hole 373 (replace the first pin 374 with the plurality of first pin holes 373), the vertical position of the support rod 367 can be adjusted. By adjusting the vertical position of the support rod 367, the vertical position of the swing member 366 can be adjusted. Thus, the position of the film presser 303 can be adjusted up and down.

  As shown in FIG. 37B, by adjusting the position of the film presser 303 in the vertical and width directions K2, the position of the film presser 303 can be adjusted between the first press position and the second press position. The first holding position S1 is a position where an end of the multi-film F1 is held at a corner R4 between the upper surface R2 and the side surface R3 of the ridge R1. That is, the position corresponds to the first groove cutting position P1 of the groove cutting member 302. The second holding position S2 is a position for holding the end of the multi-film F1 between the corner R4 of the ridge R1 and the lower end of the side face F3. That is, the position corresponds to the second groove cutting position P2 of the groove cutting member 302. The pressing position of the film presser 303 can be changed corresponding to the groove cutting position of the groove cutting member 302. The end of the multi-film F1 corresponding to the third groove cutting position P3 of the groove cutting member 302 is pressed by the gauge wheel 27L (27R).

Further, a plurality of second pin holes 376 are formed in the longitudinal direction below the vertical rod portion 367a. A second pin 377 including a beta pin or the like is selectively inserted into the plurality of second pin holes 376.
The biasing member 368 is configured by a coil spring, and is fitted between the rotating member 372 and the second pin 377 in the vertical rod portion 367a. A washer 378A is provided between the urging member 368 and the rotating member 372. A washer 378B is provided between the urging member 368 and the second pin 377. The urging force (spring force) of the urging member 368 acts in a direction to push down the support rod 367 and the swing member 366. Therefore, the urging force of the urging member 368 presses the film presser 303 downward. Further, by inserting the second pin 377 into another second pin hole 376 (replace the second pin 377 with a plurality of second pin holes 376), the urging force of the urging member 368 can be changed. it can.

As shown in FIGS. 28, 29 and 34, the soil covering member 304 is supported by the first frame body 347 via the support device 379. The support device 379 has a mounting stay 380 and a bearing member 381.
As shown in FIGS. 34 and 35, the mounting stay 380 is formed of a plate material, and is provided with a lateral wall 380a attached to the third portion 347c of the first frame body 347, and a vertical wall 380b extending downward from the rear end of the lateral wall 380a. And The lateral wall 380a is arranged in an inclined shape that shifts outward in the width direction K3 as it goes rearward, and overlaps the lower surface of the third portion 347c. In the lateral wall 380a, a long hole 382 that is long in the inclined direction and that shifts outward in the width direction K3 toward the rear is formed. The lateral wall 380a (the mounting stay 380) is attached to the third portion 347c by a bolt 383 penetrating the elongated hole and the third portion 347c and a nut 384 screwed to the bolt 383. The position of the horizontal wall 380a (the mounting stay 380) can be adjusted in the longitudinal direction of the elongated hole 382. A mounting bolt 385 is fixed to the vertical wall 380b so as to protrude rearward. The bearing member 381 is rotatably mounted by the mounting bolt 385 and a nut 386 screwed to the mounting bolt 385. The earth covering member 304 is attached to the bearing member 381. The covering member 304 is formed by a disc, and the position of the mounting stay 380 is adjusted within the range of the elongated hole 382 so that the covering member 304 moves in the widthwise outward direction K3 as going backward. The position can be adjusted.

According to the multi-film laying apparatus 300 described above, the following operation and effect can be obtained.
The multi-film laying apparatus 300 includes a support frame 26 mounted on a movable traveling body 1 (tractor), and a multi-film F1 provided on the support frame 26 and wound around an axis in a width direction K2 of the support frame 26. And a grooving member 302 that forms an embedding groove 321 for embedding the end in the width direction K2 of the multi-film F1 unwound from the film roll 301 and laid on the ridge R1 in the field in the field. And a first support 306L that supports the groove cutting member 302 so that the vertical position can be adjusted and the position can be adjusted in the width direction K2. Thereby, the formation position of the embedding groove 321 in the width direction K2 of the support frame 26 can be changed, and the embedding groove 321 can be formed corresponding to the multi-films F1 having different widths.

  Further, the groove cutting member 302 includes a first groove cutting position P1 where a buried groove 321A is formed at a corner R4 between the upper surface R2 and the side surface R3 of the ridge R1, and a lower end of the corner R4 and the side surface R3. Position adjustment is made to a second groove cutting position P2 where a buried groove 321B is formed therebetween and a third groove cutting position P3 where a buried groove 321C is formed between adjacent ridges R1 in the width direction K2. It is possible. This allows a wide range of position adjustment of the groove cutting member 302.

  The first support 306L includes a first member 307 to which the groove cutting member 302 is fixed, a second member 308 that supports the first member 307 so that the vertical position can be adjusted, and a position adjustment of the second member 308 in the width direction K2. And a third member 309 that supports as possible. By dividing the first support 306L into the first member 307, the second member 308, and the third member 309, the configuration of the first support 306L can be simplified.

  Further, the multi-film laying device 300 can adjust the vertical position of the film presser 303 (film presser) that presses the end of the multi-film F1 laid on the ridge R1 and the film presser 303 (film presser). And a second support 346L that supports the position in the width direction K2 so as to be adjustable. Accordingly, the position of the film presser 303 (film presser) can be made to correspond to the position adjustment of the groove cutting member 302.

  Further, the film presser 303 (film presser) has a first press position S1 where the end of the multi-film F1 is pressed at a corner R4 between the upper surface R2 and the side surface R3 of the ridge R1, and the corner R4 and the side. The position can be adjusted between the lower end of R3 and a second holding position S2 which is a position for holding the end of the multi-film F1. Thereby, the position of the film presser 303 (film presser) can be adjusted corresponding to the first groove cutting position P1 and the second groove cutting position P2 of the groove cutting member 302.

  Further, the multi-film laying device 300 supports the support frame 26 and rolls between the adjacent ridges R1 in the width direction K2 (the bottom R5 of the groove between the adjacent ridges R1), and the film presser 303 (the film presser). The support wheels 27L and 27R (gauge wheels) are disposed on the outer side K3 in the width direction and can hold the end of the multi-film in the width direction K2. Thus, the support wheels 27L and 27R can be used as members for pressing the end of the multi-film F1 in the width direction K2. Further, by arranging the support wheels 27L and 27R on the outer side K3 in the width direction of the film presser 303 (film press section), the multi-film laying apparatus 300 can be made compact.

  In addition, the second support 346L supports a first support member 356 that supports the film presser 303 (film presser) so that the vertical position can be adjusted, and a second support that supports the first support member 356 so that the position can be adjusted in the width direction K2. And two support members 357. By dividing the second support 346L into the first support member 356 and the second support member 357, the configuration of the second support 346L can be simplified.

Further, the multi-film laying apparatus 300 includes a roll support shaft 328 that penetrates and supports the film roll 301 in the axial direction. Thus, the film roll 301 can be supported in the axial direction, and the intermediate portion of the film roll 301 can be prevented from bending downward.
The first support 306L has a shaft support member 333 that supports the roll support shaft 328 so that the vertical position can be adjusted. Thereby, the height of the film roll 301 with respect to the ridge R1 can be adjusted.

In the present embodiment, the multi-film laying device 300 is provided in the working machine 4 that performs tillage, ridge raising, and planting, but is not limited thereto. For example, the multi-film laying device may be a device that is independently attached to a traveling body. Further, the multi-film laying apparatus 300 may be employed in a working machine in which tilling and ridge erection are performed in one step and planting is not performed.
Next, the covering frame 400 that supports the covering ring 74 will be described in detail.

FIG. 38 shows a side view of the rear part of the transplant unit 51A (51B). FIG. 39 shows the left earth covering ring 74AL (74BL) and the earth covering frame 400AL (400BL) in the transplant unit 51A (51B).
As shown in FIGS. 38 and 40, the frame support portion 73AL includes an upper wall 73a, a lower wall 73b located below the upper wall 73a, and a front wall 73c connecting front ends of the upper wall 73a and the lower wall. And As shown in FIG. 39, an adjustment groove 401a long in the width direction K2 is formed in the front wall 73c of the frame support portion 73AL. Below the adjustment groove 401a, an adjustment groove 401b long in the width direction K2 is formed in parallel. The frame support 73AR, the frame support 73BL, and the frame support 73BR are configured similarly to the frame support 73AL.

One earth covering ring 74 is supported by one earth covering frame 400. Since the cover frame 400AL, the cover frame 400AR, the cover frame 400BL, and the cover frame 400BR have the same structure, only one cover frame 400 will be described in the following description.
First, the outline of the earth covering frame 400 will be described.

  As shown in FIGS. 38 and 39, the soil cover frame 400 has a vertical support member 402 provided on the transplant frame 69A (69B), and the position of the soil cover ring 74 can be adjusted around the vertical support member 402 and the transplant is possible. It is adjustable in the width direction K2 of the frame 69A (69B). The soil covering frame 400 includes a first frame 403 supported by the transplant frame 69A (69B), and a second frame 404 supported by the first frame 403. The first frame 403 includes a vertical support member 402. The second frame 404 is supported by the first frame 403 so as to be adjustable in position around the vertical support member 402. Further, the second frame 404 supports the earth covering ring 74.

Hereinafter, the soil covering frame 400 will be described in detail.
As shown in FIGS. 38 and 39, the first frame 403 connects the vertical support member 402, the bracket member 405 attached to the transplant frame 69A (69B), and the vertical support member 402 to the bracket member 405 so as to be able to move up and down. It has a parallel link 406, a spring 407 that extends over the vertical support member 402 and the bracket member 405 and urges the earth covering ring 74 downward, and a second frame attachment portion 408 to which the second frame 404 is attached. The vertical support member 402 is disposed in front of the bracket member 405. The vertical support member 402 is configured by a member (a vertically long member) that is long in the vertical direction (up and down direction).

  As shown in FIGS. 40 and 41, the vertical support member 402 has a first wall 402a, a second wall 402b, and a third wall 402c. The first wall 402a and the second wall 402b are provided side by side at an interval in the width direction K2. The third wall 402c connects the front ends of the first wall 402a and the second wall 402b in the vertical direction. As shown in FIG. 38, a plurality of holes (first holes) 409 are formed in the first wall 402a at intervals in the vertical direction. A plurality of holes (second holes) 410 are also formed in the second wall 402b at intervals in the vertical direction. The first holes 409 and the second holes 410 are formed in the same number and corresponding to the width direction K2. The corresponding first hole 409 and second hole 410 in the width direction K2 are formed concentrically.

  As shown in FIGS. 40 and 42, the bracket member 405 is attached to the frame support portion 73 so as to be position-adjustable in the width direction K2. In other words, the transplant frame 69A (69B) has the frame support portion 73 for attaching the bracket member 405 in the width direction K2 so as to be adjustable. The bracket member 405 has one side wall 405a, another side wall 405b, a connecting wall 405c, and a regulating wall 405d. The one side wall 405a and the other side wall 405b are provided side by side at an interval in the width direction K2. The connection wall 405c connects the rear ends of the one side wall 405a and the other side wall 405b. The connection wall 405c is overlaid on the front surface of the front wall 73c of the frame support 73. The connection wall 405c is attached to the frame support 73 by two fasteners 411 constituted by bolts 411a and nuts 411b. More specifically, the bolt 411a passes through the adjustment grooves 401a and 401b and penetrates the connecting wall 405c. The nut 411b is screwed to the bolt 411a on the front side of the connection wall 405c. By tightening the fastener 411, the bracket member 405 is immovably fixed to the frame support portion 73. By loosening the fastener 411, the bracket member 405 can be moved to the frame support 73 in the width direction K2. As a result, the bracket member 405 (the soil cover frame 400) is supported so as to be adjustable in the width direction K2 with respect to the frame support portion 73 (the transplant frame 69A (69B)). By adjusting the position of the bracket member 405 in the width direction K2, the position of the earth covering frame 400 is adjusted in the width direction K2. Thereby, the position of the earth covering ring 74 is adjusted in the width direction K2. That is, the transplanter 3 includes the soil cover frame 74 that can be adjusted in the width direction of the transplant frame 69A (69B).

  In addition, the implanting device 68A (68B) of the present embodiment swings the implanting mechanisms 68AL, 68AR (68BL, 68BR) to transfer the implanters 137AL, 137AR (137BL, 137BR) to the transplant frame 69A (69B). ) Can be changed in the width direction K2. By adjusting the position of the bracket member 405 (covering frame 400) in the width direction K2, the positions of the covering rings 74AL, 74AR (74BL, 74BR) correspond to the changes in the positions of the planting tools 137AL, 137AR (137BL, 137BR). To change the position.

As shown in FIGS. 38 and 40, the lower part of one side wall 405a and the other side wall 405b has an extension 405e formed to extend forward. The regulating wall 405d is provided over the extension 405e of the one side wall 405a and the other side wall 405b.
As shown in FIG. 40, the parallel link 406 is provided over the vertical support member 402 and the bracket member 405. The parallel link 406 includes an upper link 406U and a lower link 406D disposed below the upper link 406U. A tubular member (first cylinder) 412 is provided at a front end of the upper link 406U. A cylinder member (second cylinder) 413 is also provided at the rear end of the upper link 406U. A tube member (third tube) 414 is provided at the front end of the lower link 406D. A cylinder member (fourth cylinder) 415 is also provided at the rear end of the lower link 406D.

  As shown in FIG. 41, the first cylinder 412 is disposed between the first wall 402a and the second wall 402b. The first link pin 416 is inserted through the first cylinder 412, the first hole 409, and the second hole 410. That is, the front end of the upper link 406U is pivotally supported (rotatably supported) by the vertical support member 402 via the first link pin 416. The first link pin 416 protrudes from the vertical support member 402 in one and the other in the width direction K2. An engagement portion (first engagement portion) 417 is provided at one end of the first link pin 416. A hook (second hook) 418 is provided at the other end of the first link pin 416.

  As shown in FIG. 42, the second cylinder 413 is disposed between one side wall 405a and the other side wall 405b. The second link pin 419 is inserted through the second cylinder 413 and the one side wall 405a and the other side wall 405b. That is, the rear end of the upper link 406U is pivotally supported (rotatably supported) by the bracket member 405 via the second link pin 419. The second link pins 419 project from the bracket member 405 in one and the other in the width direction K2. A hook (third hook) 420 is provided at one end of the second link pin 419. A hook (fourth hook) 421 is provided at the other end of the second link pin 419.

  As shown in FIG. 41, the third cylinder 414 is disposed between the first wall 402a and the second wall 402b. The third link pin 422 is inserted through the third cylinder 414 and the first hole 409 and the second hole 410. That is, the front end of the lower link 406D is pivotally supported (rotatably supported) by the vertical support member 402 via the third link pin 422. One end of the third link pin 422 protrudes from the first wall 402a. One end of a fixed plate (first fixed plate) 423 is fixed to one end of the third link pin 422. The other end of the first fixing plate 423 is fixed to one end of the first link pin 416. At the other end of the third link pin 422, a screw hole 424 is formed. A fixing bolt 425 is screwed into the screw hole 424. Thereby, the first link pin 416, the third link pin 422, the first cylinder 412, and the third cylinder 414 are attached to the vertical support member 402.

  Also, by removing the fixing bolt 425 from the screw hole 424, the first link pin 416 can be removed from the first cylinder 412, the first hole 409, and the second hole 410, and the third link pin 422 can be removed from the third cylinder. 414 and the first hole. That is, the first link pin 416, the third link pin 422, the first cylinder 412, and the third cylinder 414 can be removed from the vertical support member 402. Further, with the first link pin 416, the third link pin 422, the first cylinder 412, and the third cylinder 414 removed, the vertical support member 402 is vertically moved, and the vertical support member 402 is moved to the changed position. By attaching the first link pin 416, the third link pin 422, the first cylinder 412, and the third cylinder 414, the vertical support member 402 can be vertically adjusted with respect to the parallel link 406. In other words, the parallel link 406 is attached to the vertical support member 402 so that the vertical position can be adjusted. By adjusting the position of the vertical support member 402 up and down, the height of the earth covering ring 74 can be changed in accordance with the change in height of the transplant frame 69A (69B).

  As shown in FIG. 42, the fourth cylinder 415 is disposed between one side wall 405a and the other side wall 405b. The fourth link pin 426 is inserted through the fourth cylinder 415 and the one side wall 405a and the other side wall 405b. That is, the rear end of the lower link 406D is pivotally supported (rotatably supported) by the bracket member 405 via the fourth link pin 426. The fourth link pins 426 protrude from the bracket member 405 in one and the other in the width direction K2. A hook (fifth hook) 427 is provided at one end of the fourth link pin 426. An engaging portion (sixth engaging portion) 428 is provided at the other end of the fourth link pin 426.

  As shown in FIG. 42, a mounting pin 429 is provided between the second link pin 419 and the fourth link pin 426. The mounting pin 429 is inserted through one side wall 405a and the other side wall 405b. At one end of the mounting pin 429, a screw hole 430 is formed. A fixing bolt 431 is screwed into the screw hole 430. The fixing bolt 431 penetrates the one side wall 405a and is screwed into the screw hole 430. An intermediate portion of a fixing plate (second fixing plate) 432 is fixed to the other end of the mounting pin 429. One end of the second fixing plate 432 is fixed to the other end of the second link pin 419. The other end of the second fixing plate 432 is fixed to the other end of the fourth link pin 426. Thus, the second link pin 419 and the fourth link pin 426 are attached to the bracket member 405.

As described above, one covering frame 400 supports one covering ring 74 so as to be able to move up and down. Thus, one of the two covering rings 74 corresponding to one planting mechanism 68 does not float from the ridge R1, and the two covering rings 74 can always follow the ridge R1. it can. A plurality of earth covering rings may be supported by one earth covering frame.
As shown in FIG. 40, when the lower link 406D abuts on the regulating wall 405d, the downward movement of the vertical support member 402 with respect to the bracket member 405 is regulated.

  As shown in FIGS. 43 and 44, the spring 407 is formed by a coil spring. The spring 407 includes a first spring 407L disposed on one side of the vertical support member 402 and a second spring 407R disposed on the other side of the vertical support member 402. One end of the first spring 407L is hooked on the first hook 417 (see FIG. 43). The other end of the first spring 407L is selectively hooked on the third engaging portion 420 or the fifth engaging portion 427. In the illustrated example, it is hooked on the fifth hook 427 (see FIG. 44). In addition, one end of the second spring 407R is hooked on the second hook 418 (see FIG. 43). The other end of the second spring 407R is selectively hooked on the fourth hook 421 or the sixth hook 428. In the illustrated example, it is hooked on the sixth hook 428 (see FIG. 44). The earth covering ring 74 is urged downward by the urging force of the spring 407. In other words, the spring 407 applies a covering pressure to the covering ring 74.

  Further, the biasing force can be changed by selectively hooking the other end of the first spring 407L to the third engaging portion 420 or the fifth engaging portion 427. The biasing force can also be changed by selectively hooking the other end of the second spring 407R to the fourth engaging portion 421 or the sixth engaging portion 428. In the present embodiment, the urging force of the spring 407 can be changed in three stages. The first stage biasing force is a biasing force in a state where the other end of the first spring 407L is hooked on the third engaging portion 420 and the other end of the second spring 407R is hooked on the fourth engaging portion 421. The urging force in the second stage is the urging force in a state where the other end of the first spring 407L is hooked on the third engaging portion 420 and the other end of the second spring 407R is hooked on the sixth engaging portion 428, or the first spring. This is a biasing force in a state where the other end of 407L is hooked on the fifth engagement portion 427 and the other end of the second spring 407R is hooked on the fourth engagement portion 421. The third stage biasing force is a biasing force in a state where the other end of the first spring 407L is hooked on the fifth engaging portion 427 and the other end of the second spring 407R is hooked on the sixth engaging portion 428.

Further, when the height of the transplant frame 69A (69B) is changed, the height of the earth covering ring 74 can be changed by adjusting the vertical support member 402 up and down, so that the height of the transplant frame 69A (69B) can be changed. It is not necessary to change the setting of the earth covering pressure corresponding to.
As shown in FIGS. 45A and 45B, the second frame mounting portion 408 is formed of a plate material whose plate surface faces up and down, and is fixed to the lower end of the vertical support member 402. The second frame attachment portion 408 extends from the vertical support member 402 to one side and the other side. A first guide groove 433 is formed on one side of the vertical support member 402 in the second frame 404 member. A second guide groove 434 is formed on the other side of the vertical support member 402 in the second frame 404 member. The first guide groove 433 and the second guide groove 434 are formed in an arc shape centered on a vertical line O1 located between the first wall 402a and the second wall 402b. Further, the first guide groove 433 and the second guide groove 434 are formed so as to penetrate the second frame mounting portion 408 in the thickness direction.

  As shown in FIGS. 38 and 39, the second frame 404 has a first support bracket 436 that supports the earth covering ring 74, and a second support bracket 437 that supports the first support bracket 436. The second frame 404 has a support shaft 438 provided on the first support bracket 436. The support shaft 438 is a shaft that rotatably supports the earth covering ring 74. That is, the first support bracket 436 rotatably supports the earth covering ring 74. Further, the second frame 404 has a mounting bracket 439 (mounting portion) that is mounted on the vertical support member 402. The mounting bracket 439 is provided at the front of the second support bracket 437 and forward of the support shaft 438.

  As shown in FIGS. 45A and 45B, the mounting bracket 439 has an upper wall 439a, a front wall 439b extending downward from the front end of the upper wall 439a, and a rear wall 439c extending downward from the rear end of the upper wall 439a. . The upper wall 439a is overlaid on the lower surface of the second frame mounting portion 408. A first bolt hole 440 corresponding to the first guide groove 433 and a second bolt hole 441 corresponding to the second guide groove 434 are formed in the upper wall 439a. A bolt 442 is inserted into the first guide groove 433 and the first bolt hole 440 from above, and a nut 443 is screwed into the bolt 442 on the lower surface side of the upper wall 439a. Further, a bolt 444 is inserted into the second guide groove 434 and the second bolt hole 441 from above. A nut 445 is screwed to the bolt 444 on the lower surface side of the upper wall 439a (see FIG. 45A). Thus, the first frame 403 is attached to the second frame 404. By loosening the bolts 442 and 444 and the nuts 443 and 445, the second frame 404 (rear part) can swing around the vertical line O1. The first frame 403 is fixed to the second frame 404 by tightening the bolts 442 and 444 and the nuts 443 and 445 at the position where the first frame 403 is swung. That is, the position of the earth covering ring 74 can be adjusted around the vertical support member 402 together with the first frame 403. In other words, the first frame 403 has a mounting portion 439 that is mounted around the vertical support member 402 so as to be position-adjustable. The cover ring 74 swings around the vertical line O1 by adjusting the position around the vertical support member 402 (see FIG. 47). That is, the angle of the earth covering ring 74 can be adjusted around the vertical support member 402. The second frame attachment portion 408, the attachment bracket 439, the bolts 442, 444, and the nuts 443, 445 constitute an angle adjustment portion 446 for adjusting the angle of the earth covering ring 74. Note that the position of the earth covering ring 74 in the width direction K2 is also changed by adjusting the position around the vertical support member 402.

By adjusting the position (angle adjustment) of the covering ring 74 around the vertical support member 402 and by adjusting the position of the covering ring 74 in the width direction K2 of the transplant frame 69A (69B) along the frame supporting portion 73, The position of the earth covering ring 74 can be finely adjusted. Thereby, the position of the earth covering ring 74 can be set to an appropriate position with respect to the seedling to be planted.
As shown in FIG. 47, the first support bracket 436 is made of a plate material, and has one side wall 436a, another side wall 436b, a front wall 436c, and a rear wall 436d. The one side wall 436a and the other side wall 436b are provided side by side at an interval in the width direction K2. The front wall 436c extends from the front end of the other side wall 436b to the front end of the one side wall 436a, and connects the one wall 436a and the front end of the other side wall 436b. The rear wall 436d extends from the rear end of the one side wall 436a to the rear end of the other side wall 436b, and connects the rear ends of the one side wall 436a and the other side wall 436b. An earth covering ring 74 is arranged between one side wall 436a and the other side wall 436b. A shaft boss is provided at the center of the earth covering ring 74. A support shaft 438 is rotatably inserted through the shaft boss, one side wall 436a and the other side wall 436b. Thus, the earth covering ring 74 is rotatably supported by the first support bracket 436 (the first frame 403).

As shown in FIGS. 38 and 39, the second support bracket 437 is made of a pipe material, and extends upward and backward below the vertical support member 402, and extends downward from the front end of the upper rod 437a. It has a front rod 437b that extends and a rear rod 437c that extends downward from the rear end of the upper rod 437a. A mounting bracket 439 is fixed to a front portion of the upper rod portion 437a.
As shown in FIG. 46, a lower portion of the front rod portion 437b is provided with a front support portion 437d formed by crushing a pipe material. The front support portion 437d is overlapped with a central portion on the front surface of the front wall 436c, and is fixed to the front wall 436c by a first fastening member 448 including a bolt 448a (front-rear shaft) and a nut 448b. Further, a rear support portion 437e formed by crushing a pipe material is formed on the rear rod portion 437c. The rear support portion 437e is superimposed on the central portion of the rear surface of the rear wall 436d, and is fixed to the rear wall 436d by a second fastening member 449 including a bolt 449a (front-rear shaft) and a nut 449b. The bolts 448a, 449a of the first fastening member 448 and the second fastening member 449 have a common longitudinal axis O2.

  By loosening the first fastening member 448 and the second fastening member 449, the second support bracket 437 and the earth covering ring 74 are rotatable around the front-rear axis (around the axis O2) with respect to the first support bracket 436. . By tightening the first fastening member 448 and the second fastening member 449, the second support bracket 437 and the earth covering ring 74 cannot be rotated around the front-rear axis with respect to the first support bracket 436. Thus, the second support bracket 437 and the earth covering ring 74 are supported by the first support bracket 436 so as to be position-adjustable around the front-rear axis (axis O2). In other words, the angle of the earth covering wheel 74 can be adjusted in the vertical direction (vertical direction) by adjusting the position around the front-rear axis (axis O2) (see the imaginary line in FIG. 39).

As shown in FIGS. 46 and 47, a scraper 450 for removing mud adhering to the outer periphery of the earth covering ring 74 is attached to the rear support portion 437e. The scraper 450 has a fixing portion 450a fixed to the rear support portion 437e by the second fastening member 449, an action portion 450b contacting the outer periphery of the covering soil ring 74, and a rotation stopping portion 450c contacting the other side wall 436b.
The transplanter 3 of the present embodiment has the following operational effects.

  The transplanter 3 includes a planting device 68A (68B) for planting seedlings in the field H1, a transplant frame 69A (69B) supporting the planting device 68A (68B), and a seedling planted by the planting device 68A (68B). It has a covering soil ring 74 that approaches the soil from the side and a vertical support member 402 provided on the transplant frame 69A (69B). The position of the covering soil ring 74 can be adjusted around the vertical support member 402, and the transplant frame 69A (69B). And a cover frame 400 that can be adjusted in the width direction K2. That is, the earth covering ring 74 can perform position adjustment around the vertical support member 402 (angle adjustment around the vertical line O1) and position adjustment in the width direction K2 of the transplant frame 69A (69B). Thereby, the position of the earth covering ring 74 can be finely adjusted.

  The earth covering frame 400 is a first frame 403 including a vertical supporting member 402 and a second frame which is supported by the first frame 403 so as to be position-adjustable around the vertical supporting member 402 and supports the earth covering ring 74. And a frame 404. By dividing the earth covering frame 400 into the first frame 403 supported by the transplant frame 69A (69B) and the second frame 404 supporting the earth covering ring 74, the structure of the earth covering frame 400 can be simplified.

In addition, the second frame 404 has a first support bracket 436 that rotatably supports the earth covering ring 74 and a second support bracket 437 that supports the first support bracket 436 so that its position can be adjusted around the front-rear axis. Thereby, the angle of the earth covering ring 74 can be adjusted around the longitudinal axis, and the posture of the earth covering ring 74 can be set to an appropriate posture.
The second frame 404 is provided on the first support bracket 436 and rotatably supports the earth covering ring 74. The second frame 404 is provided on the front of the second support bracket 437 and forward of the support shaft 438. And a mounting portion attached to the vertical support member 402 so as to be adjustable in position around the vertical support member 402. According to this, by adjusting the position of the second support bracket 437 around the vertical support member 402, the earth covering ring 74 swings around the vertical support member 402, and the earth covering ring 74 moves around the vertical support member 402. The angle can be adjusted.

  Further, the first frame 403 has a bracket member 405 attached to the transplant frame 69A (69B), and a parallel link 406 for connecting the vertical support member 402 to the bracket member 405 so as to be able to move up and down. Thereby, the earth covering ring 74 can follow the ground contact surface. Further, since the earth covering ring 74 is moved up and down by the parallel link 406, space can be saved.

In addition, the transplant frame 69A (69B) has a frame supporting portion 73 to which the position of the bracket member 405 is adjustable in the width direction K2. Thereby, the position of the earth covering ring 74 together with the earth covering frame 400 can be adjusted in the width direction K2.
The transplant frame 69A (69B) can be adjusted vertically, and the parallel link 406 is attached to the vertical support member 402 so that the vertical position can be adjusted. Thus, the height of the earth covering ring 74 can be changed in accordance with the change in the height of the transplant frame 69A (69B).

The soil covering frame 400 has a spring 407 that extends over the vertical support member 402 and the bracket member 405 and urges the soil covering ring 74 downward. Thus, earth covering pressure can be applied to the earth covering ring 74.
The parallel link 406 includes an upper link 406U pivotally supported by the vertical support member 402 via the first link pin 416 and a pivot member supported by the bracket member 405 via the second link pin 419, and a lower portion of the upper link 406U. And a lower link 406D pivotally supported by the vertical support member 402 via the third link pin 422 and pivotally supported by the bracket member 405 via the fourth link pin 426, and the first link pin 416 The third link pin 422 and the fourth link pin 426 are provided with engaging portions for engaging the spring 407. Thus, the urging force on the earth covering ring 74 can be adjusted in a plurality of stages.

  Although the present invention has been described above, it should be understood that the embodiments disclosed herein are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 Running body 2 Ground work machine (rotary tiller)
3 Transplanter 4 Work machine 42R Side chair (first side chair)
42L Side Chair (2nd Side Chair)
68A Planting device 68B Planting device 72A Seedling supply device (first seedling supply device)
72B seedling supply device (second seedling supply device)
147 Supply cup 148 Supply cup 149 Transfer mechanism 150 First rotating body 151 Second rotating body 152 Cable body 214 Posture changing mechanism 215 Urging mechanism 216 Holding mechanism 231R Front chair (first front chair)
231L Front chair (2nd front chair)
233 Operation part 280L Seedling part 280R Seedling part P Route

Claims (11)

A ground working machine attached to the rear of the traveling body and working on a field;
A seedling supply device that is disposed behind the ground working machine and has a transfer mechanism that transfers a number of supply cups containing seedlings along a long loop-shaped path back and forth.
A planting device provided below the seedling supply device and for planting the seedlings supplied from the seedling supply device in a field,
A front chair on which an operator sits provided above the ground working machine and in front of the seedling supply device,
A side chair provided on one side in the width direction of the traveling body of the seedling supply device, where an operator sits,
A posture changing mechanism for changing the posture of the side chair,
Equipped with a,
The posture changing mechanism,
The posture of the side chair can be changed to a first posture in which a seat surface of the side chair is substantially horizontal, and a second posture inclined forward with respect to the first posture, and
An urging mechanism that assists a change operation of the side chair from the first posture to the second posture,
A holding mechanism for holding the posture of the side chair in the second posture . The seedling supply device,
A first rotating body disposed behind the ground work machine and rotatably supported;
A second rotator disposed behind the first rotator and rotatably supported;
A loop-shaped cable spanned between the first rotator and the second rotator,
The front chair working machine according to claim 1 is provided in front of the first rotating body. The seedling supply device has a first seedling supply device disposed on one side in the width direction, and a second seedling supply device disposed on the other side in the width direction,
The front chair, a first front chair provided in front of the first seedling supply device, according to claim 1 or 2 having a second front chair provided in front of the second seedling supply device Working machine. The side chair includes a first side chair provided on one side in the width direction of the first seedling supply device, and a second side chair provided on the other side in the width direction of the second seedling supply device. The working machine according to claim 3 , comprising: The working machine according to any one of claims 1 to 4, further comprising a position adjusting mechanism capable of adjusting the position of the side chair in the width direction. On the one side in the width direction of the ground working machine, provided with a seedling holder for placing seedlings supplied to the supply cup,
The working machine according to any one of claims 1 to 5 , wherein the front chair is arranged on the other side in the width direction of the seedling placing part. Above the ground working machine, comprises an operation unit for performing setting operation related to planting of seedlings,
The working machine according to claim 6 , wherein the front chair is disposed between the seedling holder and the operation unit. The work machine according to any one of claims 1 to 7 , wherein the ground work machine is a rotary tiller. It has a transfer mechanism that is attached to the rear of the traveling body and is arranged behind a ground work machine that works on a field, and that transfers a large number of supply cups containing seedlings along a long loop path back and forth. Seedling supply device,
A planting device provided below the seedling supply device and for planting the seedlings supplied from the seedling supply device in a field,
A front chair on which an operator sits provided above the ground working machine and in front of the seedling supply device,
A side chair provided on one side in the width direction of the traveling body of the seedling supply device, where an operator sits,
A posture changing mechanism for changing the posture of the side chair,
Equipped with a,
The posture changing mechanism,
The posture of the side chair can be changed to a first posture in which a seat surface of the side chair is substantially horizontal, and a second posture inclined forward with respect to the first posture, and
An urging mechanism that assists a change operation of the side chair from the first posture to the second posture,
A holding mechanism for holding the posture of the side chair in the second posture . A ground working machine attached to the rear of the traveling body and working on a field;
A seedling supply device that is disposed behind the ground working machine and has a transfer mechanism that transfers a number of supply cups that contain seedlings along a long loop path back and forth.
A planting device provided below the seedling supply device and for planting the seedlings supplied from the seedling supply device in a field,
A front chair on which an operator sits provided above the ground working machine and in front of the seedling supply device,
A side chair provided on one side in the width direction of the traveling body of the seedling supply device, where an operator sits,
A posture changing mechanism that changes the posture of the side chair while maintaining the position in the width direction,
A position adjusting mechanism capable of adjusting the position of the side chair in the width direction,
Equipped with a,
The posture changing mechanism,
A work machine capable of changing a posture of the side chair into a first posture in which a seating surface of the side chair is substantially horizontal and a second posture inclined forward with respect to the first posture . It has a transfer mechanism that is mounted at the rear of the traveling body and is arranged behind a ground work machine that works on a field, and that transfers a large number of supply cups containing seedlings along a long loop path back and forth. Seedling supply device,
A planting device provided below the seedling supply device and for planting the seedlings supplied from the seedling supply device in a field,
A front chair on which an operator sits provided above the ground working machine and in front of the seedling supply device,
A side chair provided on one side in the width direction of the traveling body of the seedling supply device, where an operator sits,
A posture changing mechanism that changes the posture of the side chair while maintaining the position in the width direction,
A position adjusting mechanism capable of adjusting the position of the side chair in the width direction,
Equipped with a,
The posture changing mechanism,
A transplanter capable of changing a posture of the side chair into a first posture in which a seating surface of the side chair is substantially horizontal, and a second posture inclined forward with respect to the first posture .

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