JP2020202783A - Implement - Google Patents

Abstract

To provide an implement capable of performing a fertilization work, a tillage work and a planting work continuously by one machine, and improving work efficiency.SOLUTION: An implement includes a tilling part attached to the rear of a traveling body, for tilling a field, a fertilizing part arranged on the front of the tilling part, for sprinkling fertilizer on the field, and a planting part arranged on the rear of the tilling part, for planting a seedling on the field. A chair where an operator is seated is arranged over the tilling part, on the rear of the fertilizing part, and on the front of a seedling feed section.SELECTED DRAWING: Figure 3

Description

The present invention relates to a working machine for planting seedlings in a field or the like.

Conventionally, a working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 includes a rotary cultivator mounted at the rear of the tractor and a transplanter mounted at the rear of the rotary cultivator.

JP-A-2018-000027

However, in the working machine disclosed in Patent Document 1, the fertilizing work, the tilling work, and the planting work cannot be continuously performed by one working machine. Therefore, the fertilization work, the tilling work, and the planting work had to be performed by separate working machines, and the work efficiency was not good.
In view of the above circumstances, the present invention provides a working machine capable of continuously performing fertilization work, tilling work and planting work by one machine, and can improve work efficiency. It is a thing.

The working machine according to one aspect of the present invention includes a cultivated portion attached to the rear portion of the traveling body and cultivates the field, a fertilizer application portion arranged in front of the cultivated portion and sowing fertilizer in the field, and a rear portion of the cultivated portion. It is equipped with a planting section for planting seedlings in the field.
In addition, a seedling supply unit arranged behind the tillage unit and having a transfer mechanism for transferring a large number of supply cups for accommodating seedlings supplied to the planting unit along a loop-shaped path, and the seedling supply unit. The section is provided with a chair on which a worker who supplies seedlings sits, and the chair is arranged above the tillage section, behind the fertilization section, and in front of the seedling supply section.

Further, the fertilizer application portion has a fertilizer hopper into which fertilizer is put, and the fertilizer hopper is arranged in front of the chair at a height overlapping the chair when viewed from the front.
Further, the tillage portion has a tillage body including a rotation shaft and a tillage claw attached to the rotation shaft, and an upper cover covering the upper part of the tillage body, and the fertilizer application portion is attached to the fertilizer hopper. It has a fertilizer application hose that drops the charged fertilizer toward the field, and the lower end portion of the fertilizer application hose is arranged in front of the tiller and below the upper cover.

The working machine also includes an irrigation pump, an irrigation tube connected to the irrigation pump, and a tube roll arranged in front of the chair and wound so that the irrigation tube can be unwound. Is fed out from the tube roll to the rear through above the tillage portion and below the chair.
Further, the working machine includes a mulch film laying device for laying a mulch film in a field, and the mulch film laying device has a roll support shaft for rotatably supporting a film roll around which the mulch film is wound. The roll support shaft is arranged behind the mulch portion and in front of the planting portion, and behind and below the tube roll.

Further, the working machine is provided with a spare seedling stand for mounting a container for accommodating a seedling tray having a large number of seedlings, and the spare seedling stand is arranged on the side of the chair and behind the fertilizer hopper. Has been done.
Further, the spare seedling stand is arranged at a position between the fertilizer application section and the seedling supply section in the front-rear direction and at a position overlapping with the chair when viewed from the side.

Further, the working machine includes a power transmission unit that transmits power from a prime mover mounted on the traveling body, and the power transmission unit transmits the power to the planting unit B1. And a second power transmission unit that transmits the power to the fertilizer application unit, and a third power transmission unit that transmits the power to the tillage unit.

According to the above-mentioned working machine, the fertilizing work, the tilling work, and the planting work can be continuously performed by one machine. Therefore, a series of operations such as fertilization, tillage, and planting can be efficiently performed, and the work efficiency can be improved.

It is a side view of a traveling body (tractor) and a working machine. It is a top view of a working machine. It is a side view of a working machine. It is a perspective view which looked at the working machine from the left front. It is a system diagram of the power transmission device of a tractor. It is a top view of the front part of a working machine. It is a side view of a rotary cultivator and a ridger. It is a side sectional view which shows the transmission system of the power transmitted to a rotary tiller. It is a rear perspective view of a rotary cultivator and a ridger. It is a rear view of a rotary tiller, a ridger, and an attachment body. It is a block diagram which shows the power transmission system of a work machine. It is a front view of a working machine. It is a perspective view seen from the left rear of the upper part of a fertilizer application part. It is a side view which looked at the upper part of a fertilizer application part from the left side. It is a perspective view which looked at the fertilizer application part from the right rear. It is a perspective view which looked at the feeding drive shaft, the cooperation part, etc. from the right rear. It is a perspective view which looked at the 2nd power transmission part and the like from the upper right. It is a perspective view which looked at the lower part of the 2nd power transmission part from the upper right. It is a figure which shows the specific structure of the 2nd power transmission part. It is a top view which shows a part of the power transmission system of a rice transplanter. It is a side view which shows a part of the power transmission system of a rice transplanter, a planting device and the like. It is a top view of the planting apparatus. It is a top view of the seedling supply device. It is a top view which shows the arrangement of the lid of a supply cup. It is a side view which shows the supply cup, the intermediate hopper and the planting tool. It is a top view which shows a working machine together with a container and a worker. It is a front perspective view which shows the spare seedling stand, the roll support and the like. It is a top view of a rotary tiller and a mulch film laying apparatus.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
FIG. 1 shows a working machine 1 and a traveling body 2. 2 and 3 show the working machine 1. The working machine 1 is a working machine capable of fertilizing, tilling, and planting (transplanting) seedlings while traveling together with the traveling body 2.
As shown in FIGS. 1 to 3, the working machine 1 includes a cultivating section 1A for cultivating a field, a fertilizer applying section 1B for sowing fertilizer in the field, and a transplanter 1C. The transplanter 1C has a planting unit 39 for planting seedlings in a field and a seedling supply unit 38 for supplying seedlings to the planting unit 39.

As shown in FIG. 1, the tilling portion 1A is attached to the rear portion of the traveling body 2. In the present embodiment, a tractor which is a traveling vehicle is illustrated as the traveling body 2. Further, a rotary tiller is illustrated as the tiller 1A. Hereinafter, the traveling body 2 is referred to as a tractor 2, and the cultivator 1A is referred to as a rotary cultivator. However, the traveling body 2 is not limited to the tractor, and may be another traveling vehicle. Further, the cultivator portion 1A is not limited to the rotary cultivator, and may be any device capable of cultivating the field. Further, although the rotary cultivator 1A exemplifies a center drive type rotary cultivator, it may be a side drive type rotary cultivator.

Hereinafter, unless otherwise specified, the front side (left side of FIG. 1) of the driver seated in the driver's seat 5 of the tractor 2 is the front, the rear side of the driver (right side of FIG. 1) is the rear, and the left side of the driver (FIG. 1). The front side of the driver will be described as the left side, and the driver's right side (the back side of FIG. Further, the horizontal direction K2 (see FIG. 2), which is a direction orthogonal to the front-rear direction K1 (see FIG. 1) of the tractor 2, will be described as the machine width direction K2.

Further, the direction from the central portion of the tractor 2 in the machine width direction to the right side or the left side will be described as the outside of the machine width. In other words, the outside of the machine width is the direction K2 in the machine width direction and away from the central portion of the tractor 2 in the machine width direction. The right side of the tractor 2 in the machine width direction, or the direction from the left side to the center part will be described as the inside of the machine width. That is, the inside of the machine width is the direction opposite to the outside of the machine width direction. In other words, the inside of the machine width is the direction K2 in the machine width direction and approaches the central portion of the tractor 2 in the machine width direction.

As shown in FIG. 1, the tractor 2 includes a vehicle body 6 and a traveling device 7 including a front wheel 7F mounted on the front portion of the vehicle body 6 and a rear wheel 7R mounted on the rear portion of the vehicle body 6. The vehicle body 6 has a prime mover (drive source) E1 mounted on the vehicle body 6 and a power transmission case T1 connected to the rear portion of the prime mover E1.
The prime mover E1 is, for example, a diesel engine. Further, the prime mover E1 may be a gasoline engine, an LPG engine or an electric motor, or may be a hybrid type having an engine and an electric motor.

The power transmission case T1 is configured by directly connecting a clutch housing having a built-in clutch, a transmission case having a built-in transmission, a differential case having a built-in differential device, and the like.
A driver's seat 5 is mounted on the rear portion of the vehicle body 6, and a power take-out shaft (so-called PTO shaft) 22 for taking out the power of the prime mover E1 is mounted so as to project rearward. That is, the tractor 2 has a power take-out shaft 22 that takes out the power of the prime mover E1. A steering wheel 8 is provided in front of the driver's seat 5. Further, the tractor 2 has a battery (not shown) mounted on the front portion.

FIG. 5 shows a power transmission device 4 that transmits the power of the prime mover E1 to the power extraction shaft 22 and the traveling device 7.
The power transmission device 4 includes a main propulsion shaft 4a, a main transmission unit 4b, an auxiliary transmission unit 4c, a shuttle unit 4d, a PTO clutch 4e, and a PTO propulsion shaft 4f.
Power from the prime mover E1 is intermittently transmitted to the main propulsion shaft 4a via a clutch. The main transmission 4b has a plurality of gears and a shifter for changing the connection of the gears, and the rotation input from the main propulsion shaft 4a is changed by appropriately changing the connection (meshing) of the plurality of gears with the shifter. And output (shift). Similar to the main transmission unit 4b, the auxiliary transmission unit 4c has a plurality of gears and a shifter for changing the connection of the gears, and by appropriately changing the connection (meshing) of the plurality of gears with the shifter, the main transmission unit 4c The rotation input from 4b is changed and output (shifted). The shuttle unit 4d transmits the rotational power from the auxiliary transmission unit 4c to the output shaft 4g in the forward rotation (forward rotation) state or in the reverse rotation (reverse rotation). The power transmitted to the output shaft 4g is transmitted to the rear wheel 7R via the rear wheel differential device 4h. The power transmitted to the output shaft 4g may also be transmitted to the front wheels 7F. That is, the prime mover E1 drives the traveling device 7.

The PTO clutch 4e intermittently transmits the rotational power from the main propulsion shaft 4a to the PTO propulsion shaft 4f. The rotational power from the prime mover E1 transmitted to the PTO propulsion shaft 4f is transmitted to the power take-off shaft 22 via a gear or the like. Therefore, by changing the vehicle speed of the tractor 2 by changing the rotation speed of the prime mover E1, the rotation of the power take-out shaft 22 is linked to the vehicle speed.
As shown in FIG. 1, the rotary cultivator 1A is mounted on the rear portion of the tractor 2 so as to be able to move up and down via a mounting mechanism such as a three-point link mechanism 9. The three-point link mechanism 9 has a top link 9A and a lower link 9B, and is mounted on the rear portion of the vehicle body 6. A lift link 10A capable of swinging up and down is provided at the rear portion of the vehicle body 6, and the lift link 10A is connected to the lower link 9B via a lift rod 10B. The lift link 10A is driven up and down by a hydraulic device 10C provided at the rear upper part of the vehicle body 6, and the lower link 9B is raised and lowered by moving the lift link 10A up and down. As a result, the rotary cultivator 1A moves up and down.

As shown in FIGS. 6 and 9, the rotary cultivator 1A has a rotary machine frame 11. The rotary machine frame 11 includes a transmission case 12, a front support frame 13F, a rear support frame 13R, a left side frame 15L, and a right side frame 15R. The transmission case 12 is located at the center of the rotary tiller 1A in the width direction (the same direction as the machine width direction K2). The front support frame 13F is arranged in front of the transmission case 12 so as to extend in the machine width direction K2. The rear support frame 13R is arranged behind the transmission case 12 so as to extend in the machine width direction K2. The front support frame 13F and the rear support frame 13R are connected to the transmission case 12. The left side frame 15L connects the left ends of the front support frame 13F and the rear support frame 13R to each other. The right side frame 15R connects the front support frame 13F and the right ends of the rear support frame 13R to each other. A mounting frame 14 to which the three-point link mechanism 9 is connected is attached to the rotary machine frame 11.

As shown in FIGS. 6 to 9 and 12, a rotating shaft 16 having an axial center in the machine width direction K2 is provided in a protruding shape on one side and the other side of the machine width direction K2 at the lower part of the transmission case 12. .. A large number of tilling claws 17 are fixed to the outer periphery of the rotating shaft 16 via brackets. When the rotating shaft 16 rotates around the axis in the direction of the arrow X1 in FIG. 7, the tilling claw 17 cultivates (cultivates) the field and releases the cultivated soil to the rear rear cover 19B (described later). Rotate. The rotating shaft 16 and the tilling claw 17 constitute a tiller body 18 for tilling the field.

As shown in FIGS. 6, 7, and 9, the tiller body 18 is covered with a rotary cover 19 attached to the rotary machine frame 11. The rotary cover 19 has an upper cover 19A, a rear cover 19B, and a side cover 19C. The upper part of the tiller body 18 is covered with the upper cover 19A. The rear part of the tiller body 18 is covered with the rear cover 19B. The upper end of the rear cover 19B is rotatably pivotally supported on the rotary machine frame 11 via the pivot 19D around the axis in the machine width direction K2, and is vertically swingable. The rear cover 19B is urged downward by the crackdown device 20. The repression device 20 is a device that urges the rear cover 19B downward by the force of a spring. The rear cover 19B forms the upper surface of the ridge formed by the ridge stand 51 described later.

The side of the tiller 18 is covered with a side cover 19C. The side cover 19C has a first side cover 19CL and a second side cover 19CR. The first side cover 19CL is arranged on one side (left side) of the rotary tiller 1A in the width direction (machine width direction K2). The second side cover 19CR is arranged on the other side (right side) of the rotary tiller 1A in the width direction (machine width direction K2).

The first side cover 19CL is attached to the left side frame 15L. The second side cover 19CR is attached to the right side frame 15R.
As shown in FIGS. 3, 4, 9, and 10, the working machine 1 includes a ridger 51. The ridger 51 is attached to the attachment body 196. The attachment body 196 has a first side member 196A, a second side member 196B, and an intermediate member 196C. The first side member 196A is arranged on the left side of the rotary cultivator 1A and is attached to the first side cover 19CL. The second side member 196B is arranged on the right side of the rotary cultivator 1A and is attached to the second side cover 19CR. The first side member 196A and the second side member 196B extend rearward from the front end portion of the rotary cultivator 1A. The intermediate member 196C is arranged between the first side member 196A and the second side member 196B. The intermediate member 196C is arranged in the center of the rotary tiller 1A in the width direction (machine width direction K2), and is attached to the rear support frame 13R of the rotary machine frame 11.

The ridger 51 is composed of, for example, a ridger. The ridger 51 has a shape in which the width (length in the machine width direction) expands from the front to the rear in a plan view. As shown in FIGS. 9 and 10, the ridger 51 includes side ridgers 51L and 51R and an intermediate ridger 51M. The side ridgers 51L and 51R include a first side ridger 51L and a second side ridger 51R. Therefore, two ridges are formed by forming grooves in the soil cultivated by the rotary cultivator 1A with three ridgers (first side ridger 51L, intermediate ridger 51M, second side ridger 51R). Can be formed. The upper surface of the ridge is formed by the rear cover 19B. However, the working machine 1 is not limited to the one that forms two ridges, and may be one that forms three or more ridges or only one ridge. That is, the number of ridgers 51 may be increased or decreased according to the number of ridges to be formed in the field.

The first side ridger 51L is arranged on one side (left side) in the width direction of the rotary cultivator 1A. The second side ridger 51R is arranged on the other side (right side) of the rotary cultivator 1A in the width direction. The intermediate ridger 51M is arranged at the center in the width direction of the rotary cultivator 1A.
The first side ridger 51L forms the left side surface of the left ridge of the two ridges. The second side ridger 51R forms the right side of the right ridge of the two ridges. The intermediate ridge stand 51M forms a right side surface of the left ridge and a left side surface of the right ridge.

As shown in FIG. 9, the front portion of the first side ridger 51L is attached to the first side cover 19CL via the front attachment 52. The rear portion of the first side ridger 51L is attached to the first side member 196A via the side connecting body 53.
As shown in FIG. 8, the front portion of the intermediate ridger 51M is attached to the lower portion of the transmission case 12 via the intermediate attachment body 54. The rear portion of the intermediate ridger 51M is attached to the intermediate member 196C via the intermediate connecting body 55.

As shown in FIGS. 3, 4, 6 to 10, soil gathering disks 56L and 56R are arranged in front of the rotary cultivator 1A. The soil gathering discs 56L and 56R are members for gathering soil inward in the width of the machine toward the tillage body 18. The soil gathering disk 56L is arranged on one side (left side) in the machine width direction, and is located on the left front side of the rotary cultivator 1A. The soil gathering disk 56R is arranged on the other side (right side) in the machine width direction, and is located on the right front side of the rotary cultivator 1A. The soil gathering discs 56L and 56R are arranged diagonally so as to shift from the outside of the machine width to the inside of the machine width from the front to the rear in a plan view. The earth gathering discs 56L and 56R are attached to the front support frame 13F of the rotary machine frame 11 via a disc mounting body 57 and a bracket (not shown). The length of the disc mounting body 57 can be adjusted by moving the lower member 57b in and out of the upper member 57a. By adjusting the length of the disc mounting body 57, the heights of the soil gathering discs 56L and 56R can be adjusted.

As shown in FIGS. 7 and 8, an input shaft (so-called PIC shaft) 21 for taking power into the rotary tiller 1A is provided in the front portion of the upper part of the transmission case 12. As shown in FIGS. 1 and 7, the input shaft 21 is interlocked and connected to the power take-out shaft 22 by a joint (universal joint) J1. Therefore, power is transmitted from the power take-out shaft 22 to the input shaft 21 via the joint J1. In other words, power is transmitted from the power take-out shaft 22 to the rotary cultivator 1A.

The work machine 1 includes a power transmission unit (third power transmission unit) B3 that transmits power from the engine E1 from the power extraction shaft 22 to the rotary cultivator 1A. As shown in FIG. 11, the third power transmission unit B3 has an input shaft 21, a first gear G1, a second gear G2, a third gear G3, a fourth gear G4, and a fifth gear G5.
As shown in FIGS. 8 and 11, a first gear (bevel gear) G1 is provided at the rear of the input shaft 21. The first gear G1 meshes with the second gear (bevel gear) G2. The second gear G2 is provided on the first transmission shaft S1 having an axis in the machine width direction K2. A third gear (spur gear) G3 is provided on the first transmission shaft S1. The third gear G3 meshes with the fourth gear (spur gear) G4 located below the third gear G3. The fourth gear G4 meshes with the fifth gear (spur gear) G5 located below the fourth gear G4. The fifth gear G5 is provided on the rotating shaft 16. Therefore, the power transmitted to the input shaft 21 is transmitted to the rotating shaft 16 via the first to fifth gears G1 to G5, and the rotating shaft 16 rotates in the direction of the arrow X1 in FIG.

As shown in FIG. 6, the first transmission shaft S1 extends from substantially the center in the width direction of the rotary tiller 1A toward one side (left side) outside the width of the rotary tiller 1A. A first power transmission unit B1 is provided on one end side of the first transmission shaft S1. The first power transmission unit B1 transmits the power from the engine E1 to the planting unit 39, the seedling supply unit 38, and the irrigation pump 50 described later. The first power transmission unit B1 is located on one side (left side) with respect to the center in the width direction of the rotary cultivator 1A. Hereinafter, the configuration of the first power transmission unit B1 will be described with reference to FIG.

As shown in FIG. 11, a first sprocket SP1 is provided at one end (left end) on the outer side of the machine width of the first transmission shaft S1. A second transmission shaft S2 extending in the machine width direction is provided in front of the first transmission shaft S1. A second sprocket SP2 is provided on the second transmission shaft S2. A chain 26 is hung on the first sprocket SP1 and the second sprocket SP2. As a result, the power transmitted to the first transmission shaft S1 is transmitted to the second transmission shaft S2.

A sixth gear G6 is provided at one end (left end) of the second transmission shaft S2. The sixth gear G6 rotates integrally with the second transmission shaft S2. The sixth gear G6 is a pulse detection gear for measuring the rotation speed of the second transmission shaft S2. By measuring the rotation speed of the second transmission shaft S2, the rotation speed of the prime mover E1 can be calculated.
In the vicinity of the sixth gear G6, a pulse sensor 25 that outputs a pulse-shaped signal (generates a pulse) by detecting the unevenness of the sixth gear G6 is provided. As the pulse sensor 25, for example, a magnetoresistive element type rotation sensor is adopted. The pulse sensor 25 is connected to a control device (not shown), and the generated pulse is input to the control device. The control device measures the rotation speed of the second transmission shaft S2 based on the signal from the pulse sensor 25 (by performing signal processing). By measuring the rotation speed of the second transmission shaft S2, the rotation speed of the prime mover E1 can be calculated, and the movement amount of the work machine 1 can be calculated from the rotation speed of the prime mover E1. It is also possible to detect the position (upper limit position) of the planting tool 64. The control device is configured by using a microcomputer equipped with a CPU, EEPROM, and the like. The control device is connected to, for example, the battery of the tractor 2, and power is supplied from this battery.

An electromagnetic clutch 24 is provided on one end side (left end side) of the second transmission shaft S2. The electromagnetic clutch 24 intermittently transmits the power transmitted to the second transmission shaft S2 to the third transmission shaft S3. The power transmitted to the third transmission shaft S3 is transmitted to the transplanter 1C via the power transmission system shown in FIG. 11, and the transplanter 1C is driven (specifically, the transplanter 1C is equipped with the power). The planting tool 64 and the seedling supply devices 38A and 38B, which will be described later, are driven).

The electromagnetic clutch 24 is connected to the above-mentioned control device and is controlled by the control device. The electromagnetic clutch 24 is disengaged by the clutch disengagement signal from the control device, and then is connected by the clutch connection signal from the control device. That is, the electromagnetic clutch 24 is disengaged for a required time by a command signal from the control device. In some cases, the transplanter 1C is continuously driven without disengaging the electromagnetic clutch 24 (without stopping the driving of the planting tool 64 and the seedling supply devices 38A and 38B).

Next, a power transmission system from the third transmission shaft S3 to the transplanter 1C will be described with reference to FIG.
A worm 30 is provided on the third transmission shaft S3, and the worm 30 meshes with the worm wheel 31. The worm wheel 31 is provided on the fourth transmission shaft S4. The fourth transmission shaft S4 is connected to the output shaft 32 via the brake 27. The power transmitted to the third transmission shaft S3 is transmitted to the output shaft 32 via the worm 30, the worm wheel 31, the fourth transmission shaft S4, and the brake 27. Therefore, the power from the prime mover E1 is transmitted from the output shaft 32 to the transplanter 1C via the worm 30 or the like.

By transmitting the power from the prime mover E1 to the transplanter 1C via the worm 30, the self-locking function of the worm (a state in which the worm cannot be turned from the worm wheel) makes the planting tool 64 shakuri (planting tool). It is possible to prevent the occurrence of (64 stops before the stop position (top dead center position) and reverses). Further, even if the electromagnetic clutch 24 is disengaged before the top dead center due to the urging force of the spring, the brake 27 reverses (descends) the planting tool 64 without inertial movement to the top dead center. To prevent.

The brake 27, the sixth gear (pulse detection gear) G6, the pulse sensor 25, and the electromagnetic clutch 24 are provided on one end side (left end side) of the rotary cultivator 1A in the width direction (machine width direction K2). As a result, the operator can easily access and adjust the brake 27, the sixth gear (pulse detection gear) G6, the pulse sensor 25, and the electromagnetic clutch 24 from the side of the rotary tiller 1A.

The output shaft 32 is composed of a propeller shaft. As shown in FIGS. 6 and 8, the output shaft 32 extends rearward from the upper left portion of the rotary cultivator 1A. As shown in FIG. 11, a power branching mechanism 35 including a chain transmission mechanism or the like is provided in the middle part of the output shaft 32 near the front. A part of the rotational power of the output shaft 32 is branched by the power branching mechanism 35 and transmitted to the irrigation pump 50 via the gear mechanism 49 to drive the irrigation pump 50. As shown in FIGS. 6 and 27, the irrigation pump 50 is mounted on the upper left portion of the rotary cultivator 1A, and is an irrigation tube arranged in the vicinity of the planting tool from the water tank mounted on the tractor 2 or the like. Send water to (described later).

Next, the fertilizer application portion 1B will be described.
As shown in FIGS. 3 and 6, the fertilizer application portion 1B is arranged in front of the rotary tiller (cultivator) 1A. Specifically, the fertilizer application portion 1B is arranged in front of the rotating shaft 16 of the rotary tiller (cultivator) 1A. Further, as shown in FIG. 1, the fertilizer application portion 1B is arranged behind the tractor 2. Therefore, the driver who drives the tractor 2 can look back and confirm that the fertilizer is being sown in the field from the fertilizer application portion 1B.

As shown in FIGS. 12 to 15, the fertilizer application unit 1B includes a fertilizer hopper 401, a feeding mechanism 402, and a fertilizer application hose 403.
Fertilizer to be sown in the field is put into the fertilizer hopper 401. The fertilizer hopper 401 is composed of a container which is partially or wholly transparent. As a result, the remaining amount of fertilizer inside the fertilizer hopper 401 can be visually recognized from the outside. A lid 404 that can be opened and closed is provided on the upper part of the fertilizer hopper 401, and fertilizer can be put into the fertilizer hopper 401 by opening the lid 404.

The fertilizer hopper 401 is arranged above the rotary cultivator 1A. As shown in FIG. 3, the fertilizer hopper 401 is arranged in front of the rotation shaft 16 of the rotary cultivator 1A in the front-rear direction. Further, the fertilizer hopper 401 is arranged in front of the chairs (first front chair 187A and second front chair 187B, which will be described later) on which the worker who works on the transplanter 1C sits. As a result, the worker seated on the chairs (first front chair 187A and second front chair 187B) can easily add (replenish) fertilizer to the fertilizer hopper 401.

As shown in FIGS. 3 and 12, the fertilizer hopper 401 is in front of the chairs (first front chair 187A and second front chair 187B), and the chairs (first front chair 187A and second front chair 187A and second front) are viewed from the front. It is arranged at a height that overlaps with the chair 187B). Specifically, the fertilizer hopper 401 is at a height that overlaps the backrest portion of the chairs (first front chair 187A and second front chair 187B), and is at a position higher than the seat portion of the chair. The upper end of the fertilizer hopper 401 is located higher than the chairs (first front chair 187A and second front chair 187B). As a result, the height of the line of sight of the worker seated on the chairs (first front chair 187A and second front chair 187B) and the height of the fertilizer hopper 401 are substantially the same. Therefore, the worker seated on the chairs (first front chair 187A and second front chair 187B) can easily check the remaining amount of fertilizer in the fertilizer hopper 401 by looking back.

As shown in FIG. 2, in the fertilizer hopper 401, the length in the machine width direction K2 is longer than the length in the front-rear direction K1. As shown in FIGS. 12, 13, and 15, a plurality of fertilizer extraction portions 405 are connected to the lower portion of the fertilizer hopper 401. The plurality of fertilizer extraction units 405 are arranged side by side in the machine width direction. In the case of this embodiment, four fertilizer extraction units 405 are arranged side by side in the machine width direction. As a result, the fertilizer charged into one fertilizer hopper 401 is divided into a plurality (four) fertilizer extraction units 405 and taken out downward. The number of fertilizer extraction units 405 is set according to the number of planting tools 64, which will be described later.

As shown in FIGS. 13 to 15, a rotary roll type feeding mechanism 402 is provided below the fertilizer hopper 401 to feed the fertilizer charged into the fertilizer hopper 401 toward the fertilizer application hose 403 in predetermined amounts. The feeding mechanism 402 has a feeding roll shaft 407, a driven gear 408, a feeding drive shaft 409, and a drive gear 410.
The feeding roll shaft 407 penetrates the fertilizer taking-out portion 405 and extends in the machine width direction K2. By rotating around the axis, the feeding roll shaft 407 feeds out fertilizer by a predetermined amount from the fertilizer taking-out portion 405 connected to the lower part of the fertilizer hopper 401 toward the fertilizer application hose 403. A plurality of driven gears 408 are attached to the feeding roll shaft 407. The feeding roll shaft 407 and the plurality of driven gears 408 rotate integrally. The plurality of driven gears 408 are arranged at intervals in the length direction (machine width direction) of the feeding roll shaft 407. The plurality of driven gears 408 are provided corresponding to the plurality of fertilizer extraction units 405, respectively. In the case of the present embodiment, since the driven gears 408 are provided corresponding to the four fertilizer extraction units 405, the number of the driven gears 408 is four.

The feeding drive shaft 409 extends in the machine width direction behind the feeding roll shaft 407. A plurality of drive gears 410 are attached to the feeding drive shaft 409. The feeding drive shaft 409 and the plurality of drive gears 410 rotate integrally. The plurality of drive gears 410 are arranged at intervals in the length direction (machine width direction) of the feeding drive shaft 409. The plurality of drive gears 410 mesh with the plurality of driven gears 408, respectively. In the case of the present embodiment, since the drive gear 410 is provided in mesh with each of the four driven gears 408, the number of the drive gear 410 is four.

As described above, the drive gear 410 provided on the feeding drive shaft 409 and the driven gear 408 provided on the feeding roll shaft 407 are in mesh with each other. As a result, when the drive gear 410 rotates together with the feed drive shaft 409, the feed roll shaft 407 rotates together with the driven gear 408. When the feeding roll shaft 407 rotates, the fertilizer charged into the fertilizer hopper 401 is fed out toward the fertilizer application hose 403 via the plurality of fertilizer extraction units 405.

The feeding drive shaft 409 is rotationally driven by the power transmitted from the second power transmission unit B2. The second power transmission unit B2 transmits the power from the engine E1 to the fertilizer application unit 1B. Specifically, the second power transmission unit B2 transmits the power transmitted from the fifth transmission shaft S5 to the delivery drive shaft 409. As shown in FIG. 6, the fifth transmission shaft S5 has an axial center in the machine width direction K2 and is arranged on the same axis as the first transmission shaft S1. The fifth transmission shaft S5 extends from the transmission case 12 toward the other side (right side) outside the machine width.

As shown in FIG. 11, the fifth transmission shaft S5 extends from the second gear (bevel gear) G2 that meshes with the first gear G1 (bevel gear) toward the side opposite to the first transmission shaft S1. A second power transmission unit B2 is provided on the side of the fifth transmission shaft S5 opposite to the first transmission shaft S1 (on the right end side). The second power transmission unit B2 is located on the other side (right side) of the rotary cultivator 1A with respect to the center in the width direction.

As shown in FIGS. 11 and 15 to 19, the second power transmission unit B2 includes a transmission gear mechanism 420, a clutch mechanism 421, and a cooperation unit 422.
The transmission gear mechanism 420 is provided on the other end side (right side) of the fifth transmission shaft S5 outside the machine width. As shown in FIGS. 18 and 19, the transmission gear mechanism 420 has a first transmission gear 423, a second transmission gear 424, and a third transmission gear 425. The first transmission gear 423, the second transmission gear 424, and the third transmission gear 425 are housed in a gear case 426 (see FIG. 17). In FIG. 18, the right half of the gear case 426 is omitted, and in FIG. 19, the gear case 426 is omitted.

The first transmission gear 423 is attached to the other end side (right side) of the fifth transmission shaft S5 outside the machine width, and rotates integrally with the fifth transmission shaft S5. The second transmission gear 424 meshes with the first transmission gear 423. The third transmission gear 425 meshes with the second transmission gear 424. The third transmission gear 425 is attached to the sixth transmission shaft S6. The sixth transmission shaft S6 is connected to one end side of the seventh transmission shaft S7 via the clutch mechanism 421. The clutch mechanism 421 can switch between an allowable state and a cutoff state of power transmission from the sixth transmission shaft S6 to the seventh transmission shaft S7 by operating the clutch lever 427. When the power transmission from the 6th transmission shaft S6 to the 7th transmission shaft S7 becomes an allowable state, the power from the 5th transmission shaft S5 is transmitted to the feeding drive shaft 409 via the second power transmission unit B2. When the power transmission from the 6th transmission shaft S6 to the 7th transmission shaft S7 is cut off, the power from the 5th transmission shaft S5 is cut off at the 2nd power transmission unit B2 and transmitted to the feeding drive shaft 409. Not done.

The clutch lever 427 extends upward from the height positions of the sixth transmission shaft S6 and the seventh transmission shaft S7. As shown in FIG. 6, the upper end portion (operating portion) of the clutch lever 427 is located behind the fertilizer hopper 401 and in front of the chair (second front chair 187B) on which the operator sits. As a result, the worker seated on the chair (second front chair 187B) can easily operate the clutch lever 427 while sitting on the chair or by slightly moving from the chair.

As shown in FIGS. 15 to 19, the linking unit 422 includes a crank arm 428, a reciprocating rod 429, a connecting body 430, a horizontal axis 431, a linking mechanism 432, and a one-way clutch 433.
As shown in FIG. 18, the crank arm 428 connects the other end side of the seventh transmission shaft S7 and the lower end side of the reciprocating rod 429. The crank arm 428 converts the rotational motion of the seventh transmission shaft S7 into the reciprocating motion of the reciprocating rod 429. The reciprocating rod 429 extends in the vertical direction and is reciprocated in the vertical direction by the power transmitted from the seventh transmission shaft S7 via the crank arm 428.

A connecting body 430 is provided on the upper end side of the reciprocating rod 429. The connecting body 430 connects the upper end side of the reciprocating rod 429 and the horizontal shaft 431. As shown in FIG. 14, the horizontal shaft 431 is arranged behind the feeding drive shaft 409 and extends in the machine width direction. The connecting body 430 transmits the power of the reciprocating motion of the reciprocating rod 429 in the vertical direction to the horizontal axis 431. As a result, the horizontal shaft 431 performs a reciprocating rotary motion that repeats rotation on one side and rotation on the other side around the axis.

As shown in FIG. 17, the cooperation mechanism 432 is provided on the other end side (right side) of the horizontal shaft 431 outside the machine width. As shown in FIG. 16, the cooperation mechanism 432 links the horizontal axis 431 and the one-way clutch 433. The cooperation mechanism 432 has a direction changing unit 434, a second reciprocating rod 435, and a connecting piece 436. The direction changing unit 434 communicates the other end (right end) of the horizontal shaft 431 with the rear end of the second reciprocating rod 435. The second reciprocating rod 435 extends in the front-rear direction. The direction changing unit 434 converts the reciprocating rotational motion of the horizontal axis 431 around the axis into the motion of the second reciprocating rod 435 in the front-rear direction. The connection piece 436 connects the front end portion of the second reciprocating rod 435 and the one-way clutch 433.

The one-way clutch 433 is provided on the other end side (right side) of the feeding drive shaft 409 outside the machine width. The one-way clutch 433 converts the movement of the second reciprocating rod 435 in the front-rear direction into a unidirectional rotational movement around the axis of the drive shaft 409. As a result, when the second reciprocating rod 435 is driven in the front-rear direction, it intermittently rotates in one direction around the axis of the feeding drive shaft 409.

As described above, the second power transmission unit B2 transmits the power transmitted from the fifth transmission shaft S5 to the delivery drive shaft 409, so that the delivery drive shaft 409 rotates in one direction around the axis. As a result, the fertilizer charged into the fertilizer hopper 401 is delivered toward the fertilizer application hose 403 via the plurality of fertilizer extraction units 405.
In the above embodiment, the fertilizer application unit 1B is driven by the power transmitted from the engine E1 transmitted from the second power transmission unit B2, but is driven by another method (mechanism) (for example, a ground drive). Equation) may be used. For example, a wheel (driving wheel or driven wheel) that rotates in contact with the working machine 1 may be provided, and the rotational power of the wheel may be transmitted to the fertilizer application unit 1B (feeding drive shaft 409).

As shown in FIG. 12, the fertilizer application hose 403 extends downward from the fertilizer extraction section 405. Two fertilizer hose 403s are attached to each of a plurality (four) fertilizer extraction portions 405. Hereinafter, the two fertilizer application hoses 403 attached to one fertilizer extraction unit 405 are referred to as "fertilizer hose pairs". In the case of the present embodiment, a total of eight fertilizer hoses 403 (a total of four fertilizer hose pairs) are arranged side by side at intervals in the machine width direction. As a result, the fertilizer taken out by the plurality of (4) fertilizer extraction units 405 is divided into two fertilizer application hoses 403 and discharged downward as the feeding mechanism 402 is driven.

As shown in FIGS. 3 and 4, the lower end portion (fertilizer outlet) of the fertilizer application hose 403 is arranged in front of the tiller body 18 (rotary shaft 16, tiller claw 17) of the rotary tiller (cultivator) 1A. There is. As shown in FIG. 12, the lower end portion of the fertilizer application hose 403 is arranged at a height that overlaps with the tiller body 18 of the rotary tiller 1A when viewed from the front. Further, the lower end portion of the fertilizer application hose 403 is arranged below the upper cover 19A of the rotary tiller 1A and above the rotation shaft 16.

As shown in FIGS. 12 and 27, the lower end side of the fertilizer application hose 403 is supported by a support tool 438 attached to the support rod 437. The support rod 437 is arranged in front of and below the front support frame 13F of the rotary machine frame 11 and extends in the machine width direction. As shown in FIGS. 6, 12, and 27, a support member 439L is attached to one end side (left side) of the front support frame 13F. A support member 439R is attached to the other end side (right side) of the front support frame 13F. The support member 439L and the support member 439R extend in the machine width direction K2 in front of the front support frame 13F. One end side (left side) of the support rod 437 is attached to the support member 439L via the bracket 440L. The other end side (right side) of the support rod 437 is attached to the support member 439R via the bracket 440R.

The support 438 includes a plurality of supports 438 attached at intervals in the length direction (machine width direction) of the support rod 437. The support 438 is formed in an annular shape or a C shape in a plan view, and the fertilizer hose 403 can be inserted therethrough. By inserting one fertilizer hose 403 into each of the plurality of support 438s, the lower end side of the plurality of fertilizer hoses 403 is positioned and supported by the support 438. As a result, the lower end sides of the plurality of fertilizer hoses 403 are arranged at intervals in the machine width direction.

The number of supports 438 is the same as the number of fertilizer hoses 403 or larger than the number of fertilizer hoses 403. When the number of supports 438 is larger than the number of fertilizer hoses 403, fertilization is performed by changing the support 438 into which the fertilizer hose 403 is inserted according to the number of ridges formed by the ridger 51. The position of the lower end side of the hose 403 can be adjusted (changed).
The support tool 438 supports the lower end side of the fertilizer application hose 403 in front of the tiller body 18 (rotary shaft 16, tiller claw 17) of the rotary tiller 1A. As a result, the fertilizer that falls through the fertilizer application hose 403 is sown in front of the tiller body 18 (rotating shaft 16, tiller claw 17). The fertilizer sown in front of the tilling claw 17 is evenly mixed in the soil by being agitated with the soil by the tilling claw 17.

The plurality of supports 438 are arranged at positions corresponding to the plurality of planting tools 64 on the lower end side of the plurality of fertilizer hose pairs in the machine width direction. In other words, one pair of fertilizer hoses (two fertilizer hoses 403) is arranged corresponding to one planting tool 64. As a result, fertilizer can be supplied by two fertilizer hoses 403 to one seedling planted by one planting tool 64. Specifically, fertilizer can be supplied from the left side and the right side by two fertilizer hose 403 to one seedling planted by one planting tool 64. Therefore, fertilizer can be reliably supplied to the seedlings planted in the field.

Next, the transplanter 1C will be described.
As shown in FIGS. 2 and 11, the transplanter 1C has a plurality of transplant units (first transplant unit 36A, second transplant unit 36B). The first transplant unit 36A is provided on one side (left side) of the transplanter 1C in the machine width direction K2. The second transplant unit 36B is provided on the other side (right side) of the transplanter 1C in the machine width direction K2.

The first transplanting unit 36A includes one machine frame (referred to as the first machine frame) 37A, one seedling supply device (called the first seedling supply device) 38A, and a plurality of planting devices (referred to as the first planting device). It has 39A and 40A of soil covering devices (referred to as first soil covering devices) corresponding to the number of planting devices 39A. The first seedling supply device 38A, the first planting device 39A, and the first soil covering device 40A are mounted on the first machine frame 37A.

The second transplanting unit 36B includes one machine frame (called a second machine frame) 37B, one seedling supply device (called a second seedling supply device) 38B, and a plurality of planting devices (called a second planting device). It has 39B and 40B of soil covering devices (referred to as second soil covering devices) corresponding to the number of planting devices 39B. The second seedling supply device 38B, the second planting device 39B, and the second soil covering device 40B are mounted on the second machine frame 37B.

In the present specification, the first machine frame 37A and the second machine frame 37B are collectively referred to as a machine frame 37. Further, the first seedling supply device 38A and the second seedling supply device 38B are collectively referred to as a seedling supply device (or seedling supply unit) 38. Further, the first planting device 39A and the second planting device 39B are collectively referred to as a planting device (or planting portion) 39. The first soil covering device 40A and the second soil covering device 40B are collectively referred to as a soil covering device 40.

The seedling supply device 38 is a device that supplies seedlings (soil block seedlings, etc.) to the planting device 39. The planting device 39 is a device for planting seedlings supplied from the seedling supply device 38 in the field, and is a planting tool that moves up and down by the power of the prime mover E1, holds the seedlings and descends, and rushes into the field to plant the seedlings. Has 64. The soil covering device 40 is a device that brings the soil to the root portion of the planted seedling to cover the soil and suppresses the root portion of the seedling.

As shown in FIG. 3, the planting device (planting portion) 39 is arranged behind the tilling portion 1A. As shown in FIG. 11, the plurality of first planting devices 39A include a left first planting device 39AL and a right first planting device 39AR. The plurality of first soil covering devices 40A include a left first soil covering device 40AL corresponding to the first planting device 39AL and a first soil covering device 40AR corresponding to the first planting device 39AR. Further, the plurality of second planting devices 39B include a second planting device 39BL on the left and a second planting device 39BR on the right. The plurality of second soil covering devices 40B include a left second soil covering device 40BL corresponding to the second planting device 39BL and a second soil covering device 40BR corresponding to the second planting device 39BR.

The number of transplant units may be three or more. Further, although it is preferable that a plurality of transplant units are provided, one transplant unit may be provided. That is, the transplanter 1C need only have at least one transplant unit. Therefore, the transplanter 1C need only have at least one seedling supply device. Further, at least one planting device may be provided for one transplanting unit. That is, the transplanter 1C need only have at least one planting device (planting tool).

As shown in FIGS. 2 and 3, the transplanter 1C is vertically connected to the rear portion of the rotary cultivator 1A via a working machine connecting mechanism 41. Further, the transplanter 1C is driven up and down by an elevating drive device (not shown). The elevating drive device has an elevating cylinder (hydraulic actuator). By expanding and contracting the elevating cylinder, the chairs (first front chair 187A and second front chair 187B) supported by the chair support 150 described later and the transplanter 1C move up and down.

The working machine connecting mechanism 41 includes a toolbar 43 to which the transplanter 1C is attached, and a connecting link mechanism 44 that connects the toolbar 43 to the rotary cultivator 1A so as to be able to move up and down. The connecting link mechanism 44 is composed of a parallel link mechanism.
The toolbar 43 is formed of a square pipe and is provided behind the rear support frame 13R so as to extend in the machine width direction K2. The transplanter 1C is attached to the toolbar 43. Specifically, the first transplant unit 36A (first machine frame 37A) and the second transplant unit 36B (second machine frame 37B) are attached to the toolbar 43. Further, the first transplant unit 36A and the second transplant unit 36B are attached to the toolbar 43 so as to be adjustable in position in the machine width direction K2.

As shown in FIGS. 2 and 4, a chair support 150 is connected to the toolbar 43. The chair support 150 supports chairs (first front chair 187A and second front chair 187B) on which a worker who works on the transplanter 1C sits. The chair support 150 is arranged between the rotary cultivator 1A and the transplanter 1C.
In the working machine connecting mechanism 41, the chairs (first front chair 187A and second front chair 187B) and the transplanting machine supported by the chair support 150 by the driving of the elevating drive device 42 including the hydraulic cylinder or the electric cylinder. 1C moves up and down integrally. Here, since the connecting link mechanism 44 is composed of the parallel link mechanism, the chairs 187A and 187B and the transplanter 1C move up and down in parallel with the ground.

Next, the power transmission mechanism 105 that transmits the power from the prime mover E1 to the seedling supply device 38 and the planting device 39 will be described.
As shown in FIGS. 11 and 20, a seventh gear (bevel gear) G7 is provided at the rear end of the output shaft 32 that transmits power from the prime mover E1. The seventh gear G7 meshes with the eighth gear (bevel gear) G8. The eighth gear G8 is provided at one end (left end) of the spindle 107. As a result, the power from the prime mover E1 is transmitted from the output shaft 32 to the main shaft 107.

As shown in FIG. 20, the spindle 107 extends in the machine width direction K2 at right angles to the output shaft 32. The spindle 107 is provided over the first machine frame 37A and the second machine frame 37B. The spindle 107 is composed of a plurality of shafts and connecting shafts that interlock and connect the shafts, and can be expanded and contracted in response to the position adjustment of the machine frames 37A and 37B in the machine width direction K2. The spindle 107 rotates by receiving power from the prime mover E1 transmitted from the output shaft 32. Power is transmitted from the spindle 107 to the seedling supply device 38 and the planting device 39 of the transplanting units 36A and 36B.

As shown in FIG. 11, the spindle 107 is provided with a first torque limiter 108 and a second torque limiter 109. The first torque limiter 108 cuts off the transmission of power (torque transmission) from the spindle 107 to the first transplant unit 36A when an overload is applied to the first transplant unit 36A. The second torque limiter 109 cuts off the power transmission (torque transmission) from the spindle 107 to the second transplant unit 36B when an overload is applied to the second transplant unit 36B.

As shown in FIGS. 11, 20, and 21, the power transmitted to the spindle 107 is transmitted to the first shaft 111 via the first transmission mechanism (chain winding transmission mechanism) 115a. Further, the power transmitted to the spindle 107 is transmitted to the second shaft 112 via the second transmission mechanism (chain winding transmission mechanism) 115b.
The power transmitted to the first shaft 111 is transmitted to the first seedling supply device 38A via the third transmission mechanism (bevel gear transmission mechanism) 115c and the fourth transmission mechanism (chain winding transmission mechanism) 115d. The power transmitted to the second shaft 112 is transmitted to the second seedling supply device 38B via the fifth transmission mechanism (bevel gear transmission mechanism) 115e and the sixth transmission mechanism (chain winding transmission mechanism) 115f.

Further, the power transmitted to the first shaft 111 is transmitted to the right first planting device 39AR via the seventh transmission mechanism (chain winding transmission mechanism) 115 g, and the eighth transmission mechanism 115h, the third shaft. It is transmitted to the first planting device 39AL on the left via 113 and the ninth transmission mechanism 115i. The power transmitted to the second shaft 112 is transmitted to the second planting device 39BR on the right via the tenth transmission mechanism (chain winding transmission mechanism) 115j, and the eleventh transmission mechanism 115k, the fourth shaft 114, It is transmitted to the second planting device 39BL on the left via the 12th transmission mechanism 115m.

Next, the planting device 39 will be described.
Since the first planting device 39A and the second planting device 39B are configured in the same manner, the structure of the first planting device 39A illustrated in FIGS. 21 and 22 will be described, and the second planting device 39B will be described. The description of the structure is omitted. Further, since the first planting device 39AL on the left and the first planting device 39AR on the right are configured in the same manner except that they are configured symmetrically, the description of the common portion will be omitted.

As shown in FIGS. 21 and 22, the first planting device 39AL and the first planting device 39AR are arranged side by side in the machine width direction K2 and are arranged at different positions in the front-rear direction K1. The first planting device 39AL is attached to the first planting frame 78L, and the first planting device 39AR is attached to the second planting frame 78R.
The first planting device 39AL has a planting tool 64 and a planting elevating mechanism 139. The first planting device 39AR has a planting tool 64 and a planting elevating mechanism 139, similarly to the first planting device 39AL.

Hereinafter, the planting tool 64 in the first planting device 39AL may be referred to as a planting tool 64AL, and the planting tool 64 in the first planting device 39AR may be referred to as a planting tool 64AR. Further, the planting elevating mechanism 139 in the first planting device 39AL may be referred to as a planting elevating mechanism 139AL, and the planting elevating mechanism 139 in the first planting device 39AR may be referred to as a planting elevating mechanism 139AR.
The planting tool 64 is a member for planting seedlings in a field (ridge). The planter 64 has a beak shape with its tip pointing downward (see FIG. 21), and has a front component 140 and a rear component 141. The planting tool 64 is openable and closable when the front component 140 and the rear component 141 are separated and brought close to each other in the front-rear direction K1. The front component 140 and the rear component 141 are urged in a closing direction by a tension spring.

As shown in FIG. 21, the seventh transmission mechanism 115g includes a drive sprocket 116R that rotates integrally with the first shaft 111, a driven sprocket 117R that is supported by the first planting frame 78R via a support shaft 118R, and a drive sprocket. It has a chain 119R wound over an 116R and a driven sprocket 117R. Power is transmitted from the first shaft 111 to the support shaft 118R by the seventh transmission mechanism 115 g, and the support shaft 118R rotates.

The ninth transmission mechanism 115i extends over the drive sprocket 116L that rotates integrally with the third shaft 113, the driven sprocket 117L supported by the second planting frame 78L via the support shaft 118L, and the drive sprocket 116L and the driven sprocket 117L. It has a wound chain 119L. Power is transmitted from the third shaft 113 to the support shaft 118L by the ninth transmission mechanism 115i, and the support shaft 118L rotates.

The tenth transmission mechanism 115j is configured in the same manner as the seventh transmission mechanism 115g. Power is transmitted from the second shaft 112 to the support shaft 118R of the second planting device 39BR on the right by the tenth transmission mechanism 115j, and the support shaft 118R of the second planting device 39BR rotates.
The twelfth transmission mechanism 115m is configured in the same manner as the ninth transmission mechanism 115i. Power is transmitted from the fourth shaft 114 to the support shaft 118L of the second planting device 39BL on the left by the 12th transmission mechanism 115m, and the support shaft 118L of the second planting device 39BL rotates.

As shown in FIGS. 21 and 22, the planting elevating mechanism 139 is a device that supports the planting tool 64 and raises and lowers the planting tool 64. Specifically, the planting elevating mechanism 139AL is a device for raising and lowering the planting tool 64AL, and the planting elevating mechanism 139AR is a device for raising and lowering the planting tool 64AR.
The planting elevating mechanism 139 has a first case 120, a second case 121, and a mounting member 122. The first case 120 of the planting elevating mechanism 139AL is rotatably supported by the first planting frame 78L via a support shaft 118L. The first case 120 of the planting elevating mechanism 139AR is rotatably supported by the second planting frame 78R via a support shaft 118R. The second case 121 is rotatably supported on the free end side of the first case 120. The mounting member 122 is supported by the second case 121. The planting tool 64 is supported by the mounting member 122.

The first case 120 and the second case 121 rotate with the rotation of the support shafts 118L and 118R. In the first case 120 and the second case 121, when the first case 120 rotates in one direction around the axis in the horizontal direction, the second case 121 becomes the first case 120 in conjunction with the rotation of the first case 120. Is provided with a power transmission device so as to rotate in the opposite direction (the other side around the axis in the horizontal direction).

As the first case 120 and the second case 121 rotate, the mounting member 122 moves up and down in parallel while moving back and forth, and the planting tool 64 moves up and down in a long elliptical trajectory in the up and down direction. (Up and down).
Seedlings are dropped and supplied to the planting tool 64 at an elevated position (top dead center position). At this time, the planting tool 64 is in a closed state, and the seedlings are housed and held inside the planting tool 64. After that, the planting tool 64 holds the seedlings and descends, and the lower part rushes into the field. Further, the planting tool 64 opens when it rushes into the field, forms a planting hole in the field, and drops and releases the seedlings in the open state. As a result, seedlings are planted in the field.

In the planting device 39 having the above configuration, when the support shafts 118L and 118R make one rotation, the planting tool 64 reciprocates up and down once.
The first planting device 39AL and the first planting device 39AR are arranged at different positions in the front-rear direction K1 alongside the machine width direction K2. As a result, two seedlings are planted in a staggered pattern in the ridge by one transplanting unit (one of the adjacent seedlings is planted in the front-rear position with respect to the other in the machine width direction K2).

In this embodiment, the left and right planting tools 64 move up and down at the same time. Further, when the planting tool 64 is stopped, the left and right planting tools 64 are stopped at the top dead center position.
As shown in FIG. 11, the transplanter 1C has a plurality of assist devices 123. The plurality of assist devices 123 include a first assist device 123A provided in the first transplant unit 36A and a second assist device 123B provided in the second transplant unit 36B. The assist device 123 is a device that assists the raising and lowering operation of the planting tool 64. The assist device 123 has an assist spring that urges the planting tool 64 in a rising direction. By having the assist device 123, even if the electromagnetic clutch 24 is disengaged before the top dead center, it is possible to prevent the planting tool 64 from coasting to the top dead center and reversing.

Next, the soil covering device 40 will be described.
Since the structures of the first soil covering device 40A and the second soil covering device 40B are configured in the same manner, the first soil covering device 40A will be described, and the description of the structure of the second soil covering device 40B will be omitted.
Further, since the configurations of the first soil covering device 40AL and the first soil covering device 40AR are the same, the structure of the first soil covering device 40AL will be described, and the description of the structure of the first soil covering device 40AR will be omitted.

As shown in FIG. 11, the first soil covering device 40AL has a plurality of soil covering devices (first soil covering device 81L, second soil covering device 81R). In the case of the present embodiment, since the soil covering devices 81L and 81R are soil covering rings, the soil covering devices 81L and 81R will be described below as the soil covering rings 81L and 81R.
The soil-covering ring 81L and the soil-covering ring 81R rotate in contact with the upper surface (ground) of the field behind the planting tool 64, and bring the soil to the root portion of the planted seedling to cover the soil and suppress the root portion of the seedling.

The soil-covering ring 81L and the soil-covering ring 81R can move up and down independently, and move up and down according to the unevenness of the field. When the planting device 39 is position-adjustable in the machine width direction K2, the soil covering device 40 is configured to be position-adjustable in the machine width direction K2 correspondingly.
The soil covering ring 81L and the soil covering ring 81R function as detection members for detecting the ground height of the machine frame 37. The ground height of the machine frame 37 is the relative height of the lower end of the machine frame 37 with respect to the planting surface on which the seedlings are planted. The planting surface is a field surface that is leveled by the rear cover 19B of the rotary cultivator 1A. When ridges are formed in the field, the planting surface is the upper surface of the ridges.

Next, the seedling supply device 38 will be described.
As shown in FIGS. 2 and 3, the seedling supply device 38 is arranged above the first planting device 39A and the second planting device 39B. Specifically, the first seedling supply device 38A is arranged above the first planting device 39A. The second seedling supply device 38B is arranged above the second planting device 39B.

The seedling supply device 38 is a device for dropping and supplying seedlings to a planting tool 64 located below the seedling supply device 38.
Since the first seedling supply device 38A and the second seedling supply device 38B have the same configuration, the structure of the first seedling supply device 38A will be illustrated and described in FIGS. 23 to 25, and the second seedling supply device 38B The description of is omitted.

As shown in FIGS. 2, 3, and 23, the first seedling supply device 38A has a device frame 176 supported by the first machine frame 37A. Similarly, the second seedling supply device 38B also has a device frame 176 supported by the second machine frame 37B. A part around the device frame 176 is covered with covers 189L and 189R. Specifically, the upper portion and the side portion (left portion) of the device frame 176 of the first seedling supply device 38A on the outer side (left side) of the machine width are covered with the cover 189L. The upper part (right side) and the side part (right part) of the device frame 176 of the second seedling supply device 38B on the outer side (right side) are covered with the cover 189R.

As shown in FIG. 23, the seedling supply device 38 has a large number of supply cups 171 and 172 into which seedlings are put. The large number of supply cups includes a large number of first supply cups 171 and a large number of second supply cups 172. In the case of the present embodiment, there are 11 first supply cups 171 and 11 second supply cups 172, and the total number of supply cups is 22. The first supply cup 171 and the second supply cup 172 are arranged along a loop-shaped transfer path R1 extending in the front-rear direction K1.

Specifically, the first supply cup 171 and the second supply cup 172 are arranged side by side in a loop so as to exhibit a long oval shape in the front-rear direction K1 in a plan view. Further, the first supply cup 171 and the second supply cup 172 are alternately arranged along the oval transfer path R1.
The first supply cup 171 and the second supply cup 172 are intermittently transferred in the direction of arrow Y1 along the transfer path R1 by the transfer mechanism 177. The transfer mechanism 177 includes a first rotating body 178, a second rotating body 179, and a cord 180. The first rotating body 178 and the second rotating body 179 are composed of sprockets, and the cord 180 is composed of an endless (loop-shaped) chain wound around the first rotating body 178 and the second rotating body 179. ing. The first rotating body 178 and the second rotating body 179 are rotatably supported by the device frame 176 around the vertical axis center (the axial center extending in the vertical direction). The first supply cup 171 and the second supply cup 172 are arranged along the cord 180 on the outer peripheral side of the cord 180.

As shown in FIGS. 11 and 20, the first rotating body 178 rotates by transmitting power via the third transmission mechanism 115c and the fourth transmission mechanism 115d. As a result, the cord 180, the first supply cup 171 and the second supply cup 172 move in the direction of arrow Y1 (see FIG. 23). As shown in FIG. 11, power is transmitted to the first rotating body 178 of the second seedling supply device 38B via the fifth transmission mechanism 115e and the sixth transmission mechanism 115f.

As shown in FIG. 25, the first supply cup 171 includes a housing portion 181a for accommodating the seedling N1 to be introduced, a mounting portion 182a attached to the cord 180, and a lid 183a for closing the opening at the lower end of the housing portion 181a. Has. The second supply cup 172 also has a housing portion 181b, a mounting portion 182b, and a lid 183b. The lids 183a and 183b are pivotally supported by hinges at the lower portions of the housing portions 181a and 181b, and the lower end openings of the housing portions 181a and 181b can be opened and closed. Since the lids 183a and 183b are closed, the seedling N1 can be held in the accommodating portions 181a and 181b. Further, by opening the lids 183a and 183b, the seedling N1 can be discharged downward from the accommodating portions 181a and 181b.

As shown in FIG. 24, the lid 183a of the first supply cup 171 has a first engaging portion 184a. The lid 183b of the second supply cup 172 has a second engaging portion 184b. The first engaging portion 184a projects toward the inner peripheral side of the transfer path R1 (cord body 180) of the supply cups 171 and 172. The second engaging portion 184b projects to the outer peripheral side of the transfer path R1 (cord body 180) of the supply cups 171 and 172.

As shown in FIG. 23, the lid 183a of the first supply cup 171 opens on the left side of the transfer path R1. The first supply cup 171 represented by reference numeral OP1 is the first supply cup 171 with the lid 183a open. The position indicated by reference numeral D1 is the first open position (open position on one side in the machine width direction) in which the lid 183a of the first supply cup 171 opens. The lid 183b of the second supply cup 172 opens on the right side of the transfer path R1. The second supply cup 172 represented by the reference numeral OP2 is the second supply cup 172 with the lid 183b open. The position indicated by reference numeral D2 is the second open position (open position on the other side in the machine width direction) at which the lid 183b of the second supply cup 172 opens.

The first open position D1 and the second open position D2 are seedling dropping positions where seedlings are dropped and supplied to the planting tool 64. That is, the seedling supply device 38 has a seedling dropping position, which is a position where seedlings are dropped and supplied to the planting tool 64 in the middle of the transfer path R1 in the front-rear direction.
As shown in FIG. 23, the first open position D1 and the second open position D2 are set at different positions in the front-rear direction K1. In the present embodiment, the first open position D1 is displaced rearward with respect to the second open position D2. The left planting device in each transplant unit is displaced rearward with respect to the right planting device in response to the first open position D1 being displaced rearward with respect to the second open position D2. ing.

As shown in FIG. 24, the seedling supply device 38 has a setting member 185 that sets the open positions of the supply cups 171 and 172 (the first open position D1 and the second open position D2 can be set). The setting member 185 includes a plurality of regulation rods (first regulation rod 186a to sixth regulation rod 186f).
The first regulation rod 186a abuts on the lower surfaces of the lids 183a and 183b on the front side of the first open position D1 and the second open position D2. Therefore, the first regulating rod 186a restricts the opening of the lids 183a and 183b on the front side of the first opening position D1 and the second opening position D2. The second regulation rod 186b comes into contact with the lower surfaces of the lids 183a and 183b on the rear side of the first open position D1 and the second open position D2. Therefore, the second regulation rod 186b restricts the opening of the lids 183a and 183b on the rear side of the first opening position D1 and the second opening position D2.

The third regulation rod 186c comes into contact with the first engaging portion 184a of the lid 183a on the front side of the first open position D1. As a result, the third regulating rod 186c regulates the opening of the lid 183a on the front side of the first opening position D1. The fourth regulation rod 186d comes into contact with the second engaging portion 184b of the lid 183b on the rear side of the second open position D2. As a result, the fourth regulation rod 186d restricts the opening of the lid 183b on the rear side of the second opening position D2.

The fifth regulation rod 186e is located on the left side of the first open position D1 and comes into contact with the second engaging portion 184b of the lid 183b at the first open position D1. This restricts the opening of the lid 183b at the first open position D1. It also allows the lid 183a to open at the first open position D1. The sixth regulation rod 186f is located on the left side of the second open position D2 and comes into contact with the first engaging portion 184a of the lid 183a at the second open position D2. This restricts the opening of the lid 183a at the second open position D2. It also allows the lid 183b to open at the second open position D2.

As shown in FIG. 25, the planting tool 64 is located below the first open position D1, and when the lid 183a is opened and the seedling N1 falls, the seedling is placed on the planting tool 64 via the intermediate hopper 126. N1 is supplied. Further, the planting tool 64 is also located below the second open position D2, and when the lid 183b is opened and the seedling N1 falls, the seedling N1 is supplied to the planting tool 64 via the intermediate hopper 126. ..

As shown in FIG. 3, the supply cups 171 and 172 are at a height that overlaps with the backrest or seat of the chairs (first front chair 187A and second front chair 187B), and are located above the upper end of the chair. Is also placed in a low position. Further, the supply cups 171 and 172 are arranged at positions lower than the fertilizer hopper 401.
As shown in FIG. 23, the first seedling supply device 38A has a device frame 176 that supports the transfer mechanism 177. The device frame 176 is fixed to the upper part of the first machine frame 37A. The apparatus frame 176 has a left rod 176a, a right rod 176b, a base rod 176c, a front rod 176d, 176e, a rear rod 176f, 176g, an intermediate rod 176h, 176i, and a curved body 176j, 176k.

The left rod 176a extends in the front-rear direction at the left portion of the first seedling supply device 38A. The right rod 176b extends in the front-rear direction at the right portion of the first seedling supply device 38A. The base rod 176c extends in the front-rear direction between the left rod 176a and the right rod 176b. The front rods 176d and 176e extend in the machine width direction at the front portion of the first seedling supply device 38A. The front rod 176d connects the front portion of the base rod 176c and the front portion of the left rod 176a. The front rod 176e connects the front portion of the base rod 176c and the front portion of the right rod 176b. The rear rods 176f and 176g extend in the machine width direction at the rear portion of the first seedling supply device 38A. The rear rod 176f connects the rear portion of the base rod 176c and the rear portion of the left rod 176a. The rear rod 176 g connects the rear portion of the base rod 176c and the rear portion of the right rod 176b. The front end portion of the base rod 176c is located in front of the front rods 176d and 176e. The rear end of the base rod 176c is located behind the rear rods 176f and 176g.

The intermediate rod 176h connects the rear portion of the base rod 176c and the rear portion of the left rod 176a. The intermediate rod 176i connects the front portion of the base rod 176c and the front portion of the right rod 176b. The curved bodies 176j and 176k have a U shape in a plan view. The curved body 176j is arranged at the front portion of the device frame 176, and the U-shaped open side faces rearward. The curved body 176k is arranged at the rear portion of the device frame 176, and the U-shaped open side faces forward. The curved bodies 176j and 176k are provided on the outer peripheral side of the transfer path R1 (cord body 180) of the supply cups 171 and 172. The front portion of the curved body 176j is fixed to the front standing body 176m erected at the front end portion of the base rod 176c. The rear portion of the curved body 176k is fixed to the rear standing body 176n erected at the rear end portion of the base rod 176c.

A first rotating body 178 is rotatably supported around the center of the vertical axis (the center of the axis extending in the vertical direction) at the front portion of the base rod 176c. A second rotating body 179 is rotatably supported around the center of the vertical axis at the rear portion of the base rod 176c. On the left side of the front rod 176d, the first idler 251 is rotatably supported around the vertical axis. A second idler 252 is rotatably supported around the center of the vertical axis on the right side of the front rod 176e. A third idler 253 is rotatably supported around the vertical axis on the left side of the rear rod 176f. A fourth idler 254 is rotatably supported around the vertical axis on the right side of the rear rod 176 g. On the left side of the intermediate rod 176h, the fifth idler 255 is rotatably supported around the vertical axis. On the right side of the intermediate rod 176i, the sixth idler 256 is rotatably supported around the vertical axis. The first idler 251 to the sixth idler 256 are composed of sprockets. The sprocket rotates by engaging with the chain constituting the cord 180.

The first idler 251 to the sixth idler 256 constitute a tension applying body that applies tension to the cord 180 wound around the first rotating body 178 and the second rotating body 179. The tension applying body (first idler 251 to sixth idler 256) applies tension toward the outer peripheral side of the cord body 180 so that the cord body 180 does not loosen. Of the tensioning bodies, the fifth idler 255 and the sixth idler 256 apply tension to the cord 180 at the open positions D1 and D2 of the lids 183a and 183b. Specifically, the fifth idler 255 applies tension to the cord 180 at the first open position D1. The sixth idler 256 applies tension to the cord 180 at the second open position D2.

The upper part of the first guide member 174L and the outer side (left side) of the machine width are covered with a cover 176o. The cover 176o is attached to the left rod 176a. The upper part of the first guide member 174R and the outer side (right side) of the machine width are covered with a cover 176p. The cover 176p is attached to the right rod 176b.
As shown in FIGS. 2 to 4 and 26, the working machine 1 has a plurality of chairs on which the workers M1 to M4 working on the transplanter 1C sit. The plurality of chairs are a plurality of front chairs (first front chair 187A, second front chair 187B) and a plurality of rear chairs (first rear chair 187C, second rear chair 187D). The first front chair 187A is provided in front of the first transplant unit 36A, and the second front chair 187B is provided in front of the second transplant unit 36B. Further, the first rear chair 187C is provided behind the first transplant unit 36A, and the second rear chair 187D is provided behind the second transplant unit 36B.

In other words, in the transplanter 1C having the first seedling supply device 38A and the second seedling supply device 38B arranged side by side in the machine width direction K2, the first front chair 187A is provided in front of the first seedling supply device 38A. , The second front chair 187B is provided in front of the second seedling supply device 38B. Further, the first rear chair 187C is provided behind the first seedling supply device 38A, and the second rear chair 187D is provided behind the second seedling supply device 38B.

The first front chair 187A and the second front chair 187B are chairs on which the workers M1 and M2 sit facing the rear (the seedling supply device 38 side). The first rear chair 187C and the second rear chair 187D are chairs on which the workers M3 and M4 sit facing forward (the seedling supply device 38 side).
By providing chairs on which the worker sits in front of and behind the seedling supply device 38, the width of the work machine 1 in the machine width direction K2 can be reduced (narrowed), which facilitates movement between fields and transports trucks. Easy transportation (advantageous). Further, since the first open position D1 (seedling drop position) and the second open position D2 (seedling drop position) are located in the middle of the transfer path R1 of the supply cups 171 and 172, that is, the position where the seedlings are dropped. Is not in front of you, so the work of supplying seedlings to the supply cups 171 and 172 becomes easy. Further, since the work of the front workers M1 and M2 and the work of the rear workers M3 and M4 are unified, it becomes easy to change workers.

The positions of the first front chair 187A and the second front chair 187B can be adjusted in the machine width direction, the front-rear direction, and the vertical direction by the position adjusting mechanism machine.
As shown in FIG. 3, operating levers (first operating lever 167 and second operating lever 168) are provided behind the first front chair 187A and the second front chair 187B. As shown in FIG. 2, the operating levers (first operating lever 167, second operating lever 168) are arranged between the first front chair 187A and the second front chair 187B in the machine width direction K2. An operation lever 167 and a second operation lever 168) are provided. The two operating levers 167 and 168 are arranged between the first front chair 187A and the second front chair 187B and the seedling supply device 38 in the front-rear direction. By swinging the first operating lever 167 back and forth, the planting depth (relationship between the height of the detection member and the planting depth) based on the detection result by the detection member (soil covering ring 81L, 81R) is changed. Can be done. By swinging the second operating lever 168 back and forth, the drive of the elevating drive device 42 can be switched between a first state in which the machine frame 37 is raised and a second state in which the machine frame 37 is lowered.

As shown in FIG. 2, between the first front chair 187A and the transplanter 1C, a footrest plate 235A on which the worker M1 sitting on the first front chair 187A puts his / her feet is provided. Between the second front chair 187B and the transplanter 1C, a footrest plate 235B on which the worker M2 sitting on the second front chair 187B puts his / her feet is provided.
As shown in FIGS. 2 to 4, the first rear chair 187C and the second rear chair 187D are attached to the seat frame 197. The seat frame 197 is a frame to which a chair is attached. Specifically, the first rear chair 187C and the second rear chair 187D are attached to the seat frame 197. The seat frame 197 is vertically and vertically connected to a mounting body 196 mounted on the rotary tiller 1A.

A plurality of wheels (first wheel 206A, second wheel 206B, third wheel 206C) are attached to the lower portion of the seat frame 197. The plurality of wheels are composed of, for example, tires, and are grounded to support the seat frame 197. Therefore, the seat frame 197 moves up and down with respect to the rotary cultivator 1A and the transplanter 1C following the unevenness of the field.
As shown in FIGS. 2 to 4, the seat frame 197 is provided with a locking tool 198. The locking tool 198 is arranged between the first rear chair 187C and the second rear chair 187D. As shown in FIG. 26, the locking tool 198 can lock a hole formed as a handle of the container CN2 for accommodating the seedling tray. The container CN2 locked to the locking tool 198 is held with the opened upper portion facing diagonally forward and upward. As a result, the workers M3 and M4 (see FIG. 26) seated on the first rear chair 187C and the second rear chair 187D take out the seedling tray from the container CN2 while seated, and the seedling supply stands 188A to 188D described later. Alternatively, it can be transferred to the seedling tray 190.

As shown in FIGS. 2 to 4, a footrest plate 235C on which the worker M1 seated on the first rear chair 187C puts his / her foot is arranged below the front of the first rear chair 187C. A footrest plate 235D on which the worker M2 seated on the second rear chair 187D puts his / her foot is arranged below the front of the second rear chair 187D.
As shown in FIGS. 2 to 4, 26, etc., a seedling supply table 188A is provided behind the first front chair 187A. A seedling supply stand 188B is provided behind the second front chair 187B. A seedling supply stand 188C is provided in front of the first rear chair 187C. A seedling supply stand 188D is provided in front of the second rear chair 187D. The seedling supply table 188A is located on the front side of the worker M1 seated on the first front chair 187A. The seedling supply stand 188B is located on the front side of the worker M2 seated on the second front chair 187B. The seedling supply table 188C is located on the front side of the worker M3 seated on the first rear chair 187C. The seedling supply stand 188D is located on the front side of the worker M4 seated on the second rear chair 187D.

Seedling trays having a large number of seedlings can be placed on the seedling supply stands 188A to 188D. The worker can supply seedlings to the supply cups 171 and 172 of the seedling supply device 38 from the seedling trays placed on the seedling supply stands 188A to 188D. FIG. 26 shows a state in which the seedling tray NT is placed on the seedling supply table 188C.
As shown in FIGS. 2, 4, and 26, a seedling tray 190 on which a seedling tray can be placed is provided above the first seedling supply device 38A and the second seedling supply device 38B. A plurality of seedling trays can be placed on the seedling tray 190.

Workers M1 to M4 can supply seedlings to the supply cups 171 and 172 from the seedling tray on the seedling tray 190. Since the seedling tray 190 is arranged so as to straddle the upper part of the first seedling supply device 38A and the upper part of the second seedling supply device 38B, the first front chair 187A, the second front chair 187B, and the first rear chair A worker seated in each chair of 187C and the second rear chair 187D can take seedlings from the seedling tray on the seedling stand 190. That is, the seedling stand 190 is arranged at a position where a worker seated on each chair can take seedlings from the seedling tray on the seedling stand 190.

When the seedlings in the seedling tray on the seedling supply stand 188 are exhausted, the worker can supply the seedlings in the seedling tray on the seedling tray 190 to the supply cups 171 and 172. That is, the seedling tray 190 is a platform on which a spare seedling tray is placed. When the seedlings in the seedling tray on the seedling supply stand 188 are exhausted, the empty seedling tray may be replaced with the seedling tray on the seedling tray 190. Further, the seedling feeding table 190 may be used as a common seedling supply table for each worker without providing the seedling supply table 188 located in front of each worker.

As shown in FIGS. 2 to 4, 6, 26, and 27, the working machine 1 is provided with spare seedling stands 280L and 280R for mounting the container CN1 for accommodating the seedling tray. The spare seedling stands 280L and 280R are arranged outside the width of the rotary cultivator 1A. Specifically, the spare seedling stand 280L is arranged on the left side of the rotary cultivator 1A, and the spare seedling stand 280R is arranged on the right side of the rotary cultivator 1A. The spare seedling stands 280L and 280R are arranged on the side of the chairs (first front chair 187A, second front chair 187B). Specifically, the spare seedling stand 280L is arranged on the left side (outside the machine width) of the first front chair 187A. The spare seedling stand 280R is arranged on the right side (outside the machine width) of the second front chair 187B. Further, the spare seedling stands 280L and 280R are arranged behind the fertilizer hopper 401.

The spare seedling stand 280L and the spare seedling stand 280R have the same configuration except for the arrangement. Therefore, the configuration of the spare seedling stand 280L will be mainly described below, and the description of the configuration of the spare seedling stand 280R will be omitted.
As shown in FIGS. 4 and 27, the spare seedling stand 280L has a first support column 281 and a second support column 282, a mounting frame body 283, and a mounting plate 284. FIG. 27 shows a state in which the mounting plate 284 is removed from the mounting frame body 283.

The first support column 281 and the second support column 282 are attached to the first side member 196A and the second side member 196B of the mounting body 196, respectively, and extend upward from the first side member 196A and the second side member 196B. .. The first support column 281 and the second support column 282 are arranged at intervals in the front-rear direction. A mounting frame body 283 is fixed to the upper portions of the first support column 281 and the second support column 282.

As shown in FIG. 2, the mounting frame body 283 is a rectangular frame body in a plan view in which the length in the front-rear direction is longer than the length in the machine width direction. The mounting plate 284 is a rectangular plate in a plan view in which the length in the front-rear direction is longer than the length in the machine width direction, and is mounted on the mounting frame body 283. The mounting frame body 283 and the mounting plate 284 are provided at positions higher than the rotary tiller 1A and lower than the seating surfaces of the first front chair 187A and the second front chair 187B.

As shown in FIG. 26, the container CN1 for accommodating the seedling tray is placed on the mounting plate 284 of the spare seedling stands 280L and 280R. The container CN1 is a rectangular parallelepiped box. A plurality of seedling trays can be accommodated in the container CN1 side by side in the vertical direction. The container CN1 is open to the inside or above, and the workers M1 and M2 can take out the seedling tray housed in the container CN1 from inside or above. Further, the empty seedling tray on the seedling supply stand 188 or the seedling loading stand 190 can be replaced with the seedling tray in the container CN1. The replacement of the seedling tray is performed by the workers M1 and M2 seated on the first front chair 187A and the second front chair 187B.

The spare seedling stands 280L and 280R are located between the fertilizer application portion 1B and the seedling supply device 38 in the front-rear direction K1, and are the first front chair 187A and the second front chair 187B when viewed from the side (outside the machine body). It is placed in a position that overlaps with. As a result, the workers M1 and M2 seated on the first front chair 187A and the second front chair 187B take the seedlings housed in the container CN1 on the spare seedling stands 280L and 280R and place them on the seedling stand 190. Can be easily performed.

As shown in FIGS. 1 to 4, the working machine 1 includes tube rolls 290L and 290R around which an irrigation tube is wound. The irrigation tube is a tube that supplies water to the planted seedlings.
The tube rolls 290L and 290R are arranged between the tractor 2 and the rotary tiller 1A. That is, the tube rolls 290L and 290R are arranged behind the tractor 2 and in front of the rotary cultivator 1A. Further, the tube rolls 290L and 290R are arranged in front of the chairs (first front chair 187A, second front chair 187B). Specifically, the tube roll 290L is arranged in front of the first front chair 187A. The tube roll 290R is arranged in front of the second front chair 187B. As a result, the workers M1 and M2 seated on the chairs (first front chair 187A, second front chair 187B) can replace the tube rolls 290L and 290R.

As shown in FIG. 6, the tube roll 290L is arranged in front of the irrigation pump 50, and one end of the irrigation tube is connected to the discharge port of the irrigation pump 50. Further, the tube roll 290L is arranged between the transmission case 12 and the left side frame 15L in the machine width direction K2. The tube roll 290R is arranged between the transmission case 12 and the right side frame 15R in the machine width direction.

The tube rolls 290L and 290R are rotatably supported around the axis in the machine width direction by the roll support 291. As shown in FIG. 27, the roll support 291 has a shaft body 292, a bearing 293, and a support rod 294. As shown in FIG. 6, the shaft body 292 is arranged in front of the rotary cultivator 1A and extends in the machine width direction K2. The shaft body 292 is arranged at a position lower than the mounting plate 284 of the spare seedling stand 280L of the rotary tiller 1A.

The bearing 293 rotatably supports the shaft body 292. The support rod 294 extends in the front-rear direction, and its rear end is connected to the rotary machine frame 11 or the rotary cover 19. A bearing 293 is supported on the front portion of the support rod 294.
The tube roll 290 is attached to the shaft body 292. The tube roll 290 rotates about the axis in the machine width direction as the shaft body 292 rotates. The irrigation tube can be unwound by rotating the tube roll 290. The irrigation tube passes above the rotary cultivator 1A (above the upper cover 19A) and below the chairs (first front chair 187A, second front chair 187B) and is fed out behind the rotary cultivator 1A.

One end (the end on the unwinding side) of the irrigation tube is fixed to the field before the working machine 1 is run. The work machine 1 is run with one end fixed to the field. Then, the irrigation tube is pulled and the tube roll 290 and the shaft body 292 rotate integrally. As a result, the irrigation tube is unwound from the tube roll 290 and laid on the ridge formed by the working machine 1. Seedlings planted in the ridges can be irrigated from the laid irrigation tube.

As shown in FIGS. 1 to 4 and 28, the working machine 1 includes a mulch film laying device 300 for laying a mulch film on ridges formed in a field. The multi-film laying device 300 is mounted behind the tractor 2. Specifically, the multi-film laying device 300 is mounted on the rotary cultivator 1A mounted on the rear portion of the tractor 2. The mulch film laying device 300 is arranged behind the rotary cultivator 1A and in front of the planting portion 39 (in front of the transplanter 1C). With the mulch film laying device 300, the mulch film can be laid on the ridges formed in the field.

The multi-film laying device 300 lays the multi-film on each of the two ridges UN1 and UN2 formed side by side in the width direction of the tractor 2 (same as the machine width direction K2). Hereinafter, for convenience of explanation, of the two ridges UN1 and UN2, the ridge formed on the left side is referred to as "first ridge UN1", and the ridge formed on the right side is referred to as "second ridge UN2".
As shown in FIG. 28, the multi-film laying device 300 has a first roll support shaft 301 and a second roll support shaft 302. The first roll support shaft 301 supports the first film roll 303 around which the mulch film laid on the first ridge UN1 is wound. The second roll support shaft 302 supports the second film roll 304 on which the mulch film laid on the second ridge UN2 is wound.

The first roll support shaft 301 and the second roll support shaft 302 extend in the width direction of the tractor 2 (machine width direction K2). The first roll support shaft 301 and the second roll support shaft 302 overlap in the width direction of the tractor 2 (machine width direction K2). In other words, the portion 301a on the inner side of the machine width of the first roll support shaft 301 overlaps with the part 302a on the inner side of the machine width of the second roll support shaft 302 in the machine width direction K2.

The right end portion (the end portion on the inner side of the machine width side) of the first roll support shaft 301 is located to the right of the center of the multi-film laying device 300 in the machine width direction K2. Further, the right end portion of the first roll support shaft 301 is located to the right of the left end portion of the second roll support shaft 302 and the left end portion of the second film roll 302.
The left end portion (the end portion on the inner side of the machine width side) of the second roll support shaft 302 is located to the left of the center of the multi-film laying device 300 in the machine width direction K2. Further, it is located to the left of the right end portion of the first roll support shaft 301 and the right end portion of the first film roll 301.

The roll support shafts (first roll support shaft 301, second roll support shaft 302) are arranged behind the tillage portion 1A and in front of the planting portion 39, behind and below the tube rolls 290L and 290R. ..
As shown in FIG. 28, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be offset in the front-rear direction K1. As a result, the first film roll 303 and the second film roll 304 are arranged so as to be offset in the front-rear direction K1. In the case of the present embodiment, the first roll support shaft 301 is arranged in front of the second roll support shaft 302. However, the first roll support shaft 301 may be arranged behind the second roll support shaft 302. Further, although not shown, the first roll support shaft 301 and the second roll support shaft 302 may be arranged so as to be offset in the vertical direction.

Both ends of the first roll support shaft 301 are supported by the first shaft supports 305L and 305R. Both ends of the second roll support shaft 302 are supported by the second shaft supports 306L and 306R.
As shown in FIG. 28, the multi-film laying device 300 has a first soil covering member 321 and a second soil covering member 322, a third soil covering member 323, and a fourth soil covering member 324. The first soil covering member 321 and the second soil covering member 322, the third soil covering member 323, and the fourth soil covering member 324 are composed of a disk-shaped soil covering disk.

The first soil covering member 321 and the third soil covering member 323 are provided in an inclined shape so as to move toward the first ridge UN1 side toward the rear. The second soil covering member 322 and the fourth soil covering member 324 are provided in an inclined shape that shifts to the second ridge UN2 side toward the rear.
The first soil covering member 321 is arranged behind the right portion of the first film roll 303. The first soil covering member 321 covers one end (right end) of the multi-film unwound from the first film roll 303 and laid on the first ridge UN1 on the second ridge UN2 side. The second soil covering member 322 is arranged behind the left portion of the second film roll 304. The second soil covering member 322 covers one end (left end) of the multi-film unwound from the second film roll 304 and laid on the second ridge UN2 on the first ridge UN1 side.

The third soil covering member 323 is arranged behind the left portion of the first film roll 303. The third soil covering member 323 covers the other end (left end) of the mulch film unwound from the first film roll 303 and laid on the first ridge UN1. The fourth soil covering member 324 is arranged behind the right portion of the second film roll 304. The fourth soil covering member 324 covers the other end (right end) of the mulch film unwound from the second film roll 304 and laid on the second ridge UN2.

As shown in FIG. 28, the multi-film laying device 300 includes a first film presser 331, a second film presser 332, a third film presser 333, and a fourth film presser 334. The first film presser 331, the second film presser 332, the third film presser 333, and the fourth film presser 334 are composed of, for example, wheels.
The first film presser 331 and the third film presser 333 are provided in an inclined shape so as to move forward toward the first ridge UN1 side. The second film presser 332 and the fourth film presser 334 are provided in an inclined shape so as to move forward toward the second ridge UN2 side.

The first film presser 331 is arranged behind the first film roll 303. The first film presser 331 presses one end (right end) of the multi-film laid on the first ridge UN1 on the second ridge UN2 side (right side). The second film presser 332 is arranged behind the second film roll 304. The second film presser 332 presses one end (left end) of the multi-film laid on the second ridge UN2 on the first ridge UN1 side (left side). The third film presser 333 is arranged behind the first film roll 303. The third film presser 333 presses the other end (left end) of the multi-film laid on the first ridge UN1. The fourth film presser 334 is arranged behind the second film roll 304. The fourth film presser 334 presses the other end (right end) of the multi-film laid on the second ridge UN2.

The working machine 1 of the present embodiment has the effects described below.
The work machine 1 is mounted on the rear part of the traveling body (tractor) 2 and cultivates the field, the cultivated portion 1A, the fertilizer application portion 1B arranged in front of the cultivated portion 1A and sowing fertilizer on the field, and the rear of the cultivated portion 1A. It is provided with a planting section 39, which is arranged in the field and for planting seedlings in the field.
According to this configuration, the fertilization work, the tilling work, and the planting work can be continuously performed on one unit. Therefore, a series of operations such as fertilization, tillage, and planting can be efficiently performed, and the work efficiency can be improved.

Further, the working machine 1 has a transfer mechanism 177 that is arranged behind the tillage portion 1A and transfers a large number of supply cups 171 and 172 that accommodate the seedlings supplied to the planting portion 39 along a loop-shaped path. The seedling supply unit 38 is provided with chairs 187A and 187B on which a worker who supplies seedlings is seated. The chairs 187A and 187B are above the tillage unit 1A and behind the fertilizer application unit 1B. It is arranged in front of the seedling supply unit 38.

According to this configuration, the worker seated on the chairs 187A and 187B can easily perform the work of supplying (replenishing) fertilizer to the fertilizer application unit 1B and the work of supplying seedlings to the seedling supply unit 38.
Further, the fertilizer application portion 1B has a fertilizer hopper 401 for injecting fertilizer, and the fertilizer hopper 401 is arranged in front of the chairs 187A and 187B at a height overlapping the chairs 187A and 187B when viewed from the front. ing.

According to this configuration, the worker seated on the chairs 187A and 187B can easily check the state of the fertilizer application portion 1B (remaining amount of fertilizer, etc.) and supply (replenish) the fertilizer.
Further, the tilling portion 1A has a tilling body 18 including a rotating shaft 16 and a tilling claw 17 attached to the rotating shaft 16, and an upper cover 19A covering the upper part of the tilling body 18, and the fertilizer applying portion 1B has. The fertilizer hose 403 is provided to drop the fertilizer charged into the fertilizer hopper 401 toward the field, and the lower end of the fertilizer hose 403 is arranged in front of the tiller 18 and below the upper cover 19A. There is.

According to this configuration, the fertilizer charged into the fertilizer hopper 401 can be dropped by the fertilizer application hose 403 in front of the tiller 18 and below the upper cover 19A. As a result, the fertilizer that has fallen from the fertilizer application hose 403 can be reliably agitated by the tiller 18 and mixed with the soil.
Further, the working machine 1 includes an irrigation pump 50, an irrigation tube connected to the irrigation pump 50, and tube rolls 290L and 290R arranged in front of the chairs 187A and 187B and wound so that the irrigation tube can be unwound. The irrigation tube is fed out from the tube rolls 290L and 290R above the tillage portion 1A and below the chairs 187A and 187B.

According to this configuration, the operator seated on the chairs 187A and 187B can access the tube rolls 290L and 290R. In addition, the irrigation tube can be arranged toward the planting portion 39 without being caught in the tilling portion 1A.
Further, the working machine 1 includes a mulch film laying device 300 for laying a mulch film in a field, and the mulch film laying device 300 is a roll support shaft that rotatably supports the film rolls 303 and 304 around which the mulch film is wound. It has 301 and 302, and the roll support shafts 301 and 302 are arranged behind the tilling portion 1A and in front of the planting portion 39, and behind and below the tube rolls 290L and 290R.

According to this configuration, the irrigation tube unwound from the tube rolls 290L and 290R can be easily unwound to the vicinity of the roll support shafts 301 and 302 at the rear of the tillage portion 1A and in front of the planting portion 39. .. Therefore, water can be supplied from the irrigation tube to the soil cultivated by the tilling section 1A, covered with the film rolls 303 and 304, and the seedlings are planted by the planting section 39.

Further, the working machine 1 is provided with spare seedling stands 280L and 280R for mounting the container CN1 for accommodating a seedling tray having a large number of seedlings, and the spare seedling stands 280L and 280R are on the sides of the chairs 187A and 187B. Moreover, it is arranged behind the fertilizer hopper 401.
According to this configuration, the worker seated on the chairs 187A and 187B can take out the seedling tray housed in the container CN1 mounted on the spare seedling stands 280L and 280R.

Further, the spare seedling stands 280L and 280R are arranged at positions between the fertilizer application section 1B and the seedling supply section 38 in the front-rear direction and at positions overlapping with the chairs 187A and 187B when viewed from the side.
According to this configuration, the workers M1 and M2 seated on the chairs (first front chair 187A, second front chair 187B) take the seedlings housed in the container CN1 on the spare seedling stands 280L and 280R and place the seedlings. The work of mounting on the table 190 can be easily performed.

Further, the work machine 1 includes a power transmission unit that transmits power from the prime mover E1 mounted on the traveling body 2, and the power transmission unit is a first power transmission unit that transmits the power to the planting unit 39. Includes B1, a second power transmission unit B2 that transmits the power to the fertilizer application unit 1B, and a third power transmission unit B3 that transmits the power to the tillage unit 1A.
According to this configuration, the planting portion 39, the fertilizer application portion 1B, and the tillage portion 1A can be driven by using the power from the prime mover E1 mounted on the traveling body 2, so that it is necessary to provide a plurality of drive sources. It is possible to reduce the weight and size of the working machine 1 without any problem.

Although one embodiment of the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Working machine 1A Tilling part 1B Fertilizing part 2 Traveling body (tractor)
19A Top cover 38 Seedling supply 39 Planting 50 Irrigation pump 171, 172 Supply cup 172 Supply cup 177 Transfer mechanism 187A Chair (first front chair)
187B chair (second front chair)
280L, 280R Spare seedling stand 290L, 290R Tube roll 300 Multi-film laying device 301, 302 Roll support shaft 303, 304 Film roll 401 Fertilizer hopper B1 1st power transmission unit B2 2nd power transmission unit B3 3rd power transmission unit E1 motor (engine)
CN1 container

Claims (9)

A cultivating part that is attached to the rear of the running body and cultivates the field,
A fertilizer application section located in front of the tillage section and sowing fertilizer in the field,
A planting section located behind the tillage section and for planting seedlings in the field,
A working machine equipped with. A seedling supply unit arranged behind the tillage unit and having a transfer mechanism for transferring a large number of supply cups for accommodating seedlings supplied to the planting unit along a loop-shaped path.
A chair on which a worker who supplies seedlings sits in the seedling supply section,
With
The work machine according to claim 1, wherein the chair is located above the tillage section, behind the fertilization section, and in front of the seedling supply section. The fertilizer application section has a fertilizer hopper for feeding fertilizer.
The work machine according to claim 1 or 2, wherein the fertilizer hopper is arranged in front of the chair at a height overlapping the chair when viewed from the front. The tillage portion has a tiller body including a rotary shaft and a tiller claw attached to the rotary shaft, and an upper cover covering the upper part of the tiller body.
The fertilizer application section has a fertilizer application hose that drops the fertilizer charged into the fertilizer hopper toward the field.
The working machine according to claim 3, wherein the lower end portion of the fertilizer application hose is located in front of the tiller and below the upper cover. With an irrigation pump,
An irrigation tube connected to the irrigation pump and
A tube roll placed in front of the chair and wound so that the irrigation tube can be drawn out.
With
The working machine according to any one of claims 1 to 4, wherein the irrigation tube is fed from the tube roll to the rear through above the tillage portion and below the chair. Equipped with a mulch film laying device for laying mulch film in the field
The mulch film laying device has a roll support shaft that rotatably supports a film roll around which the mulch film is wound.
The working machine according to claim 5, wherein the roll support shaft is located behind the tillage portion and in front of the planting portion, and is arranged behind and below the tube roll. Equipped with a spare seedling stand to hold a container for a seedling tray with a large number of seedlings
The working machine according to claim 3, wherein the spare seedling stand is located on the side of the chair and behind the fertilizer hopper. The work according to claim 7, wherein the spare seedling stand is arranged at a position between the fertilizer application section and the seedling supply section in the front-rear direction and overlaps with the chair when viewed from the side. Machine. It is equipped with a power transmission unit that transmits power from the prime mover mounted on the traveling body.
The power transmission unit includes a first power transmission unit that transmits the power to the planting unit, a second power transmission unit that transmits the power to the fertilizer application unit, and the power transmission unit to the tillage unit. The working machine according to any one of claims 1 to 8, further comprising a third power transmission unit that transmits to the third power transmission unit.

Images