JP2020065519A - Working machine - Google Patents

Abstract

To provide a working machine that comprises a first ground working machine fitted to a traveling body, and a second ground working machine fitted to the first ground working machine so as to be capable of being elevated/lowered, in which a relationship between the height of a chair on which a worker is seated and the height of the second ground working machine can be made constant.SOLUTION: A working machine comprises: a first ground working machine fitted to a rear part of a traveling body; a second ground working machine fitted to a rear part of the first ground working machine so as to be capable of being elevated/lowered, and for planting seedlings in a field; an elevating/lowering driving device for driving elevating/lowering of the second ground working machine; a chair on which a worker for working on the second ground working machine is seated; and a working machine connection mechanism for connecting the second ground working machine and the chair to the first ground working machine so as to be capable of being integrally elevated/lowered.SELECTED DRAWING: Figure 14

Description

  The present invention relates to a working machine for planting seedlings in a field, for example.

Conventionally, the working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 includes a tractor, a cultivating device mounted on the rear part of the tractor, and a seedling supply unit disposed behind the cultivating device. A chair on which a worker sits is provided above the tiller and in front of the seedling supply unit. Then, the cultivating device, the seedling supply unit, and the like can be moved up and down with respect to the tractor by the mounting means formed of a three-point link mechanism provided at the rear portion of the tractor.

JP, 10-127112, A

  However, with the above working machine, it is not possible to raise and lower the seedling supply section and the like with respect to the tilling device. Further, in the above working machine, since the chair on which the worker sits moves up and down together with the tilling device, if the seedling feeding unit and the like are configured to be able to move up and down with respect to the tilling device, the relationship between the height of the chair and the height of the seedling feeding unit. Is not constant. Therefore, it may be difficult to supply seedlings to the seedling supply section.

  In view of the above situation, the present invention provides a working machine including a first ground working machine mounted on a traveling body and a second ground working machine mounted on a second ground working machine so as to be capable of moving up and down, (EN) Provided is a work machine capable of maintaining a constant relationship between the height of a chair on which a worker sits and the height of a second ground work machine.

  A working machine according to an aspect of the present invention includes a first ground working machine mounted on a rear portion of a traveling body and a second ground working machine mounted on a rear portion of the first ground working machine so as to be capable of moving up and down and planting seedlings in a field. Machine, a lifting drive device for driving the second ground working machine up and down, a chair on which a worker working on the second ground working machine sits, and the second ground working machine for the first ground working machine. And a work machine connecting mechanism that integrally connects the work machine and the chair so as to be capable of moving up and down.

Also, the work implement coupling mechanism includes a toolbar to which the second ground work implement is attached, a chair support that is connected to the toolbar and supports the chair, and the toolbar and the chair support that are the first ground work. And a connecting link mechanism that is connected to the machine so as to be able to move up and down.
Further, the connection link mechanism includes a lower link and an upper link, and the lower link connects the chair support and the first ground work machine at one end side in the length direction of the toolbar. A lower link and a second lower link that connects the chair support and the first ground work implement at the other end in the length direction of the toolbar, and the upper link has the length of the toolbar. The chair support and the first ground work implement are connected at a central portion in the direction.

Further, the connection link mechanism has a connection member that connects the first lower link and the second lower link.
Further, the lifting drive device includes a lifting cylinder that connects the first ground work machine and the upper link.
Further, the second ground work machine is connected to the work machine connecting mechanism and is moved up and down by the lifting drive device, and is supported by the machine frame so as to be able to move up and down, and when it descends, enters the field. A planting tool for planting seedlings, and the machine frame is attached to the toolbar.

In addition, the working machine includes a spare seedling stand for mounting a container that houses a seedling tray, and the spare seedling stand is arranged above the first ground working machine.
Further, the working machine includes a tube roll around which a watering tube for supplying water to the planted seedling is wound, and the tube roll is arranged between the traveling body and the first ground working machine.

  According to the working machine described above, the working machine connecting mechanism that connects the second grounding working machine and the chair to the first grounding working machine so as to be integrally movable up and down is provided. In a work machine including a work machine and a second ground work machine that is mounted on the second ground work machine so as to be able to move up and down, the relationship between the height of the chair on which the worker sits and the height of the second ground work machine is made constant. be able to.

It is a side view of a working machine. It is a top view of a ground work device. It is a side view of a ground work device. It is a system diagram of the power transmission device of a tractor. It is a side view of a rotary tiller and a ridger. It is a top view of a rotary tiller and a ridger. It is a side sectional view showing a transmission system of power transmitted to a rotary cultivator. It is a rear perspective view of a rotary tiller and a ridger. It is a side view of a rotary tiller, a ridger, and an attachment. 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 working machine. It is a front perspective view which shows a chair support body and a seedling supply stand. It is a top view which shows a rotary tiller, a connection link mechanism, and a preliminary seedling stand. It is a side view which shows the movement of a chair support body and a transplanter when a raising / lowering drive device is driven. It is a rear perspective view which shows the attachment structure of an intermediate ridger. It is a top view of a machine frame. It is a side view of a machine casing. It is a front view of a machine frame. It is a front view which shows the effect | action of the angle adjustment mechanism which adjusts the relative angle between a plurality of planting devices. It is a top view which shows a seedling supply apparatus, a 1st back chair, a 2nd back chair, etc. It is a rear perspective view of a connection frame and a stand. It is a rear view of a connection frame and a stand. It is a side view of a connection frame and a stand. It is a top view showing a part of power transmission system of a transplanter. It is a top view explaining the expansion-contraction structure of a main axis. It is a sectional view of a main shaft and a cover cylinder. It is a side view showing a part of power transmission system of a transplanter, a planting device, etc. It is a top view of a planting device. It is a front perspective view showing an angle adjusting mechanism which adjusts a relative angle between a plurality of planting devices, a position adjusting part (1st position adjusting part) which adjusts a position of a soil covering device, etc. It is a side view which shows a mode that a detection member (earth covering wheel) and a support frame are rocking | fluctuating with respect to a machine frame. It is a top view of a detection member (covering earth wheel), a support rod, and a support frame. It is a side view showing a support frame, the 1st rocking board, a wire, etc. It is a perspective view showing a rear part position adjusting mechanism. It is a front view which shows a mode that the position of a support frame and a detection member (covering wheel) is adjusted with the front part position adjustment mechanism and the rear part position adjustment mechanism. It is a side view which shows a control valve, a wire, etc. It is a side view which shows operation | movement of a 1st operation lever. It is a top view of a seedling supply device. It is a top view which shows arrangement | positioning of the lid of a supply cup. It is a perspective view which shows the circumference | surroundings of a 2nd open position, seeing from upper direction. It is a perspective view which shows the circumference | surroundings of a 2nd open position, seeing from below. It is a side view which shows a supply cup, an intermediate hopper, and a planting tool. It is a longitudinal cross-sectional view of the 1st guide member, the 2nd guide member, etc. in a 2nd open position. It is a front view which shows a 1st position adjusting mechanism. It is a side view which shows a 2nd position adjusting mechanism. It is a side view which shows a 3rd position adjusting mechanism. It is a perspective view showing a part of position adjustment mechanism and a support mechanism. It is a perspective view which shows a 1st front chair, a footrest board, etc. It is a perspective view which shows the attachment method of a footrest plate. It is a side view of a transplanter. It is a perspective view which shows the effect | action (operation | movement) of a rotation support mechanism. It is a rear view which shows the effect | action (operation | movement) of a rotation support mechanism. It is a perspective view showing movement of a seedling supply stand. It is a perspective view which shows another movement of a seedling supply stand. It is a top view which shows the replacement method of a seedling supply stand. It is a front perspective view showing a spare seedling stand and the like. It is a top view of a rotary tiller and a multi-film laying device. FIG. 3 is a side view of the rotary cultivator and the mulch film laying device at a substantially central portion in a machine width direction. It is a top view of the rotary tiller and the left part of a mulch film installation device. It is a side view of a rotary tiller and the left part of a mulch film installation device. It is a rear view of the left part periphery of a 1st film roll. FIG. 3 is a plan view of the rotary cultivator and the mulch film laying device in the approximate center in the machine width direction.

An embodiment of the present invention will be described below with reference to the drawings as appropriate.
FIG. 1 shows a working machine 1 capable of planting seedlings (planting) together with ground work (plowing etc.) while traveling. The work machine 1 includes a traveling body 1A and a ground work device 1B mounted on a rear portion of the traveling body 1A. The ground work device 1B includes a first ground work machine 2 that is mounted on the rear part of the traveling body 1A so as to be able to move up and down, and a second ground work machine 3 that is mounted on the rear part of the first ground work machine 2 so that it can be moved up and down. ing.

In the present embodiment, a tractor that is a traveling vehicle is illustrated as the traveling body 1A. Further, a rotary cultivator is illustrated as the first ground work machine 2. Further, a transplanter for planting seedlings in the field is illustrated as the second ground work machine 3. Hereinafter, the traveling body is referred to as a tractor 1A, the first ground working machine is referred to as a rotary cultivator 2, and the second ground working machine is referred to as a transplanter 3.
The traveling body 1A is not limited to the tractor and may be another traveling vehicle. Further, the first ground work machine 2 is not limited to the rotary tiller, and may be any machine that works on the field. Further, although the rotary cultivator 2 is a center drive type rotary cultivator, it may be a side drive type rotary cultivator.

  FIG. 1 shows a side view of the working machine 1. Unless otherwise specified in the embodiment, the front side (left side in FIG. 1) of the driver seated in the driver's seat 5 of the tractor 1A is front, the rear side (right side in FIG. 1) of the driver is rear, and the left side of the driver (FIG. 1 will be described as the left side and the driver's right side (the back side in FIG. 1) as the right side. Further, a horizontal direction K2 (see FIG. 2) that is a direction orthogonal to the front-rear direction K1 (see FIG. 1) of the tractor 1A will be described as a machine width direction K2.

  Further, the direction from the central portion in the machine width direction of the tractor 1A to the right portion or the left portion will be described as the machine width outer side. In other words, the machine width direction is the machine width direction K2 and the direction away from the center of the tractor 1A in the machine width direction. The right side of the tractor 1 </ b> A in the machine width direction or the direction from the left side to the center of the tractor 1 </ b> A will be described as the machine width inner side. That is, the inside of the machine width is the direction opposite to the outside in the machine width direction. In other words, the inner side of the machine width is the direction K2 in the machine width direction, which is the direction approaching the central portion of the tractor 1A in the machine width direction.

As shown in FIG. 1, the tractor 1A includes a vehicle body 6 and a traveling device 7 including a front wheel 7F attached to a front portion of the vehicle body 6 and a rear wheel 7R attached to a rear portion of the vehicle body 6. The vehicle body 6 includes a prime mover (driving source) E1 and a power transmission case T1 connected to a 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 including a clutch, a transmission case including a transmission, a differential case including a 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-off shaft (so-called PTO shaft) 22 for taking out the power of the prime mover E1 is provided in a rearward protruding shape. That is, the traveling body 1A has the power takeoff 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 1A has a battery (not shown) mounted on the front portion.

FIG. 4 shows the power transmission device 4 that transmits the power of the prime mover E1 to the power takeoff 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 discontinuously transmitted to the main propulsion shaft 4a via a clutch. The main transmission unit 4b has a plurality of gears and a shifter that changes the connection of the gears. By appropriately changing the connection (meshing) of the plurality of gears with the shifter, the rotation input from the main propulsion shaft 4a is changed. And output (shift). Like the main transmission unit 4b, the sub-transmission unit 4c has a plurality of gears and a shifter for changing the connection of the gears, and the main transmission unit can be changed by appropriately changing the connection (meshing) of the plurality of gears with the shifter. 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 normal 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 discontinuously 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-out shaft 22 via a gear or the like. Therefore, the rotation of the power take-off shaft 22 is linked to the vehicle speed by changing the vehicle speed of the tractor 1A by changing the rotation speed of the prime mover E1.
As shown in FIG. 1, the rotary cultivator 2 is mounted on the rear portion of the tractor 1A 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 attached to the rear part of the vehicle body 6. A lift link 10A capable of swinging up and down is provided at the rear part of the vehicle body 6, and the lift link 10A is connected to a lower link 9B via a lift rod 10B. The lift link 10A is driven up and down by a hydraulic device 10C provided on the upper rear portion of the vehicle body 6, and the lower link 9B is lifted and lowered by vertically moving the lift link 10A. As a result, the rotary cultivator 2 moves up and down.

  As shown in FIGS. 5, 6, and 8, the rotary cultivator 2 has a rotary machine casing 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 cultivator 2 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 and extends 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. The right side frame 15R connects the right ends of the front support frame 13F and the rear support frame 13R. 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 FIG. 6, the mounting frame 14 has front extending portions 34L and 34R extending forward from the front support frame 13F. The lower links 9B of the three-point link mechanism 9 are connected to the front extending portions 34L and 34R. The front portions of the extending members 35L and 35R extending rearward from the upper portions are attached to the upper portions of the front extending portions 34L and 34R. The rear portions of the extending members 35L and 35R are attached to the upper portion of the rear support frame 13R.

  As shown in FIGS. 5 to 7, a rotary shaft 16 having a shaft center in the machine width direction K2 is provided in a lower portion of the transmission case 12 in a protruding shape in one and the other of the machine width direction K2. A large number of plowing pawls 17 are fixed to the outer periphery of the rotary shaft 16 via brackets. By rotating the rotary shaft 16 around the axis in the direction of the arrow X1 in FIG. 5, the plowing claws 17 plowing (plow) the field and throwing the plowed soil to the rear rear cover 19B. The rotary shaft 16 and the plowing claw 17 constitute a plowing section 18 for plowing the field.

  As shown in FIGS. 5, 6 and 8, the tilling section 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 cultivating part 18 is covered with an upper cover 19A. The rear of the tiller 18 is covered with a rear cover 19B. An upper end of the rear cover 19B is rotatably supported by the rotary machine frame 11 via a pivot shaft 19D about an axis in the machine width direction K2, and is vertically swingable. The rear cover 19B is urged downward by the elastic pressure device 20. The elastic 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 ridger 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 cultivator 2 in the width direction (machine width direction K2). The second side cover 19CR is arranged on the other side (right side) of the rotary cultivator 2 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. The first side cover 19CL and the second side cover 19CR have the same configuration except that they are attached at different positions. Therefore, the configuration of the first side cover 19CL will be described, and the description of the second side cover 19CR will be omitted.

  As shown in FIGS. 8 and 9, the first side cover 19CL includes an upper side cover 19C1, a lower side cover 19C2, a front side cover 19C3, and a support cover 19C4. The upper side cover 19C1 covers a lateral upper part of the tilling part 18. The lower side cover 19C2 covers a lateral lower part of the tilling part 18. The upper side cover 19C1 is attached to the left side frame 15L. The lower side cover 19C2 is connected to the upper side cover 19C1 via a connection plate 19C5. The front side cover 19C3 extends forward from the front end of the upper side cover 19C1.

  As shown in FIGS. 8 and 9, the support cover 19C4 includes a side plate 19Cs, an upper plate 19Cu, and a lower plate 19Cd. The side plate 19Cs is attached to the surface of the left side frame 15L on the machine width outer side. The upper plate 19Cu and the lower plate 19Cd extend from the side plate 19Cs to the outer side of the machine width. The upper plate 19Cu and the lower plate 19Cd are arranged at intervals in the vertical direction. The front portion of the mounting body 196 is supported between the upper plate 19Cu and the lower plate 19Cd.

  As shown in FIGS. 2 and 8, the mounting body 196 includes 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 2 and attached to the left side support cover 19C4. The second side member 196B is arranged on the right side of the rotary cultivator 2 and attached to the right side support cover 19C4. The first side member 196A and the second side member 196B extend rearward from the front end portion of the rotary cultivator 2. The intermediate member 196C is arranged between the first side member 196A and the second side member 196B. The intermediate member 196C is arranged at the center of the rotary tiller 2 in the width direction (machine width direction K2) and is attached to the rear support frame 13R of the rotary machine frame 11.

  As shown in FIGS. 8 to 10, the ridger 51 is attached to the attachment body 196. 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) increases from the front to the rear in a plan view. As shown in FIGS. 8 and 10, the ridger 51 includes side ridgers 51L and 51R and an intermediate ridger 51M. The side ridger 51L, 51R includes 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 2 with three ridge risers (first side ridge riser 51L, intermediate ridge riser 51M, second side ridge riser 51R). Can be formed. The upper surface of the ridge is formed by the rear cover 19B. It should be noted that three or more ridges may be formed.

The first side ridger 51L is arranged on one side (left side) in the width direction of the rotary cultivator 2. The second side ridger 51R is arranged on the other side (right side) in the width direction of the rotary cultivator 2. The intermediate ridger 51M is arranged at the center of the rotary cultivator 2 in the width direction.
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 surface of the right ridge of the two ridges. The intermediate ridger 51M forms the right side surface of the left ridge and the left side surface of the right ridge.

The first side ridger 51L has attachment portions 51La and 51Lb attached to the rotary cultivator 2. The mounting portions 51La and 51Lb include a front mounting portion 51La provided in a front portion of the first side ridger 51L and a rear mounting portion 51Lb provided in a rear portion of the first side ridger 51L. .
As shown in FIGS. 6, 8 and 9, the front mounting portion 51La of the first side ridger 51L is provided at the front end of the first side ridger 51L, and the front mounting body 52 is It is attached to the first side cover 19CL via the. The front portion of the front attachment body 52 is attached to the outer surface (the outer surface of the machine width) of the first side cover 19CL. The front attachment body 52 is bent so as to move outward in the machine width as it goes rearward. The front attachment portion 51La of the first side ridger 51L is attached to the rear portion of the front attachment body 52. The vertical position of the front mounting portion 51La with respect to the front mounting body 52 can be adjusted.

  The rear attachment portion 51Lb of the first side ridger 51L is attached to the first side member 196A via the side coupling body 53. The rear mounting portion 51Lb of the first side ridger 51L projects rearward from the first side ridger 51L. The side coupling body 53 extends in the vertical direction, and has a lower end connected to the rear attachment portion 51Lb of the first side ridger 51L and an upper end connected to the first side member 196A. The length of the side connection body 53 can be adjusted by taking the lower member 53b in and out of the upper member 53a. By adjusting the length of the side connection body 53, the height of the first side ridger 51L can be adjusted.

The mounting structure of the front mounting portion 51Ra and the rear mounting portion 51Rb of the second side ridger 51R is the same as the mounting structure of the front mounting portion 51La and the rear mounting portion 51Lb of the first side ridger 51L. The description is omitted.
As shown in FIG. 6, the widthwise outer end of the rotary tiller 2 of the side ridges 51L and 51R (the end on the machine width outer side) is the width of the rotary tiller 2 of the side cover 19C. It is located outside the outer end in the direction (the end on the outer side of the machine width). Specifically, the left end of the first side ridger 51L is located to the left of the left end of the first side cover 19CL. The right end of the second side ridger 51R is located to the right of the right end of the second side cover 19CR.

  As shown in FIGS. 7 and 15, the front attachment portion 51Ma of the intermediate ridger 51M is attached to the lower portion of the transmission case 12 via the intermediate attachment body 54. The front end portion of the intermediate mounting body 54 is attached to the lower front portion of the transmission case 12, and the rear end portion thereof is attached to the front mounting portion 51Ma of the intermediate ridger 51M. The intermediate mounting body 54 has a length adjusting portion 54a capable of adjusting the length in the middle portion between the front end portion and the rear end portion. By adjusting the length of the length adjusting portion 54a, the position of the front attachment portion 51Ma with respect to the transmission case 42 can be adjusted.

  As shown in FIGS. 8 and 15, the rear attachment portion 51Mb of the intermediate ridger 51M is attached to the intermediate member 196C via the intermediate connector 55. The rear mounting portion 51Mb of the intermediate ridger 51M projects rearward from the intermediate ridger 51M. The intermediate coupling body 55 extends in the vertical direction, and has a lower end connected to the rear mounting portion 51Mb of the intermediate ridger 51M and an upper end connected to the intermediate member 196C. The length of the intermediate connecting body 55 can be adjusted by taking the lower member 55b in and out of the upper member 55a. By adjusting the length of the intermediate coupling body 55, the height of the intermediate ridger 51M can be adjusted.

  As shown in FIG. 5, FIG. 6, FIG. 8 and FIG. 9, earth moving disks 56 </ b> L and 56 </ b> R are arranged in front of the rotary cultivator 2. The earth-moving disks 56L and 56R are members for moving the soil inward in the machine width toward the tilling part 18. The earth gathering disc 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 2. The earth gathering disc 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 2. The earth gathering disks 56L and 56R are arranged obliquely so as to move from the machine width outside to the machine width inside as going 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 taking the lower member 57b in and out of the upper member 57a. By adjusting the length of the disk mounting body 57, the height of the earth-moving disks 56L and 56R can be adjusted.

  As shown in FIGS. 5 and 7, an input shaft (so-called PIC shaft) 21 that takes in power to the rotary cultivator 2 is provided at the front part of the upper portion of the transmission case 12. As shown in FIG. 1, the input shaft 21 is interlockingly connected to the power takeoff shaft 22 by a joint (universal joint) J1. Therefore, power is transmitted from the power take-off shaft 22 to the input shaft 21 via the joint J1. In other words, power is transmitted from the power take-off shaft 22 to the rotary cultivator (first ground work machine) 2.

  As shown in FIGS. 7 and 11, a first gear (bevel gear) G1 is provided at the rear of the input shaft 21. The first gear G1 meshes with a 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. The first transmission shaft S1 is provided with a third gear (spur gear) G3. The third gear G3 meshes with a fourth gear (spur gear) G4 located below the third gear G3. The fourth gear G4 meshes with a fifth gear (spur gear) G5 located below the fourth gear G4. The fifth gear G5 is provided on the rotary shaft 16. Therefore, the power transmitted to the input shaft 21 is transmitted to the rotary shaft 16 via the first to fifth gears G1 to G5, and the rotary shaft 16 rotates in the direction of arrow X1 in FIG.

  As shown in FIG. 6, the first transmission shaft S1 extends from the approximate center in the width direction of the rotary cultivator 2 toward the one outside the machine width (left side). A first sprocket SP1 is provided at one end portion (left end portion) on the machine width outer side 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 stretched over 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.

As shown in FIG. 11, 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. The rotation speed of the prime mover E1 can be calculated by measuring the rotation speed of the second transmission shaft S2.
As shown in FIG. 11, a pulse sensor 25 that outputs a pulsed signal (generates a pulse) by detecting the unevenness of the sixth gear G6 is provided near the sixth gear G6. 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 (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 working machine 1 can be calculated from the rotation speed of the prime mover E1. Moreover, the position (upper limit position) of the planting tool 64 can also be detected. The control device is configured by using a microcomputer including a CPU and an EEPROM. The control device is connected to, for example, a battery of the tractor 1A, and electric power is supplied from this battery.

  As shown in FIG. 11, 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 3 via the power transmission system shown in FIG. 11 to drive the transplanter 3 (specifically, the transplanter 3 is equipped with The planting tool 64 and the seedling supply devices 38A and 38B described later are driven).

  The electromagnetic clutch 24 is connected to the control device described above and is controlled by the control device. The electromagnetic clutch 24 is disengaged by a clutch disengagement signal from the control device and then engaged by a clutch connection signal from the control device. That is, the electromagnetic clutch 24 is disengaged for the required time by the command signal from the control device. The transplanter 3 may be continuously driven without disconnecting the electromagnetic clutch 24 (without stopping the driving of the planting implement 64 and the seedling feeding devices 38A and 38B).

Next, with reference to FIG. 11, a power transmission system from the third transmission shaft S3 to the transplanter 3 will be described.
The 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 3 via the worm 30 and the like.

  By transmitting the power from the prime mover E1 to the transplanter 3 through the worm 30, the self-locking function of the worm (a state in which the worm cannot be rotated by the worm wheel) causes the planting tool 64 to be crimped (planting tool). It is possible to prevent 64 from stopping before the stop position (top dead center position) and reversing. Further, the brake 27 causes a situation in which the planting tool 64 does not move to top dead center by inertia (reverses) and descends even if the electromagnetic clutch 24 is disengaged before top dead center by the biasing force of the spring. To prevent.

As shown in FIG. 6, the worm 30 and the worm wheel 31 are contained in a casing 28 provided in the upper left portion of the rotary cultivator 2. A cover 29 is provided on the right side of the casing 28 to cover the electromagnetic clutch 24, the sixth gear (pulse detection gear) G6, and the pulse sensor 25.
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 2 in the width direction (machine width direction K2). Accordingly, 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 cultivator 2.

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

Next, the transplanter 3 will be described.
As shown in FIGS. 2 and 11, the transplanter 3 has a plurality of transplant units (a first transplant unit 36A and a second transplant unit 36B). The first transplantation unit 36A is provided on one side (left side) of the transplanter 3 in the machine width direction K2. The second transplantation unit 36B is provided on the other side (right side) of the transplanter 3 in the machine width direction K2.

  The first transplantation unit 36A includes one machine frame (referred to as a first machine frame) 37A, one seedling supply device (referred to as a first seedling supply device) 38A, and a plurality of planting devices (referred to as a first planting device). 39A and 40A of soil covering devices (referred to as a first soil covering device) 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 casing 37A.

  The second transplantation unit 36B includes one machine frame (referred to as a second machine frame) 37B, one seedling supply device (referred to as a second seedling supply device) 38B, and a plurality of planting devices (referred to as a second planting device). 39B and the soil covering devices (referred to as second soil covering devices) 40B in the number corresponding to the number of the 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 casing 37B.

Hereinafter, the first machine casing 37A and the second machine casing 37B are collectively referred to as a machine casing 37. The first seedling supply device 38A and the second seedling supply device 38B are also collectively referred to as a seedling supply device 38. The first planting device 39A and the second planting device 39B are also collectively referred to as a planting device 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 the seedlings supplied from the seedling supply device 38 in the field, and is raised and lowered by the power of the prime mover E1 to hold and descend the seedlings and plunge into the field to plant the seedlings. 64. The soil covering device 40 is a device that applies 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. 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. In addition, the plurality of second planting devices 39B include a left second planting device 39BL and a right second planting device 39BR. 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, it is preferable that a plurality of transplantation units are provided, but one may be provided. That is, the transplanter 3 may have at least one transplant unit. Therefore, the transplanter 3 may have at least one seedling supply device. Moreover, at least one implanting device may be provided for one implanting unit. That is, the transplanter 3 may have at least one planting device (planting device).

As shown in FIG. 2 and FIG. 3, the transplanter 3 is connected to the rear part of the rotary cultivator 2 via a work implement connection mechanism 41 so as to be able to move up and down. Further, the transplanter 3 is driven up and down by the lifting drive device 42.
As shown in FIG. 13, the work implement connecting mechanism 41 includes a tool bar 43 to which the transplanter 3 is attached, and a connecting link mechanism 44 that connects the tool bar 43 to the rotary cultivator 2 in a vertically movable manner.

  The toolbar 43 is formed of a square pipe, and is provided behind the rear support frame 13R and extends in the machine width direction K2. The transplanter 3 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 transplantation unit 36A and the second transplantation unit 36B are attached to the tool bar 43 so that their positions can be adjusted in the machine width direction K2.

  As shown in FIG. 12 and the like, the 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 an operator who works on the transplanter 3 sits. The chair support 150 is arranged between the rotary cultivator 2 and the transplanter 3. The chair support 150 includes a first support 151, a second support 152, a connection body 153, and a position adjusting mechanism 230.

  The first support body 151 includes a front support member 151a, a rear support member 151b, and a connection support member 151c. The front support member 151a and the rear support member 151b are arranged at intervals in the front-rear direction and extend in the machine width direction K2 in parallel with each other. The connection support member 151c extends in the front-rear direction and connects the front support member 151a and the rear support member 151b. The connection support member 151c includes a plurality (six) of connection support members 151c. The plurality of connection support members 151c are arranged in parallel with each other with a space in the machine width direction. Of the plurality of connection support members 151c, two connection support members 151c1 and 151c2, which are arranged with the center in the machine width direction sandwiched therebetween, have pillar members 155L and 155R extending upward, respectively. . A support shaft 156 extending in the machine width direction is attached to an upper portion of the column member 155L and an upper portion of the column member 155R.

  The second support body 152 has vertical support members 157L and 157R and a horizontal support member 158. The vertical support member 157L is connected to the left end portion of the front support member 151a and extends upward from the left end portion. The vertical support member 157R is connected to the right end portion of the front support member 151a and extends upward from the right end portion. The horizontal support member 158 extends in the machine width direction and connects the upper end portion of the vertical support member 157L and the upper end portion of the vertical support member 157R.

A position adjustment mechanism 230 is attached to the second support body 152, and chairs (first front chair 187A and second front chair 187B) are supported via the position adjustment mechanism 230. The configuration of the position adjusting mechanism 230 will be described later.
The connection body 153 has first connection members 153L1 and 153R1 and second connection members 153L2 and 153R2. The first connecting members 153L1 and 153R1 extend in the front-rear direction. The first connection member 153L1 connects the left part of the toolbar 43 and the vertical support member 157L. The first connection member 153R1 connects the right portion of the toolbar 43 and the vertical support member 157R. A support shaft 159L protruding leftward is provided at the rear portion of the first connecting member 153L1. A support shaft 159R protruding rightward is provided on the rear portion of the first connecting member 153R1. The second connecting members 153L2 and 153R2 extend in the vertical direction. The second connecting member 153L2 connects the left end portion of the rear supporting member 151b and the front portion of the first connecting member 153L1. The second connecting member 153R2 connects the right end portion of the rear supporting member 151b and the front portion of the first connecting member 153R1.

As shown in FIGS. 2, 3, 12, and 13, the connecting link mechanism 44 includes a lower link (first lower link 44A, second lower link 44B), an upper link 44C, and a connecting member 44D. Have The connection link mechanism 44 is composed of a parallel link mechanism.
The first lower link 44A and the second lower link 44B are arranged parallel to each other and at the same height position. The upper link 44C is arranged above the first lower link 44A and the second lower link 44B. The first lower link 44A, the second lower link 44B, and the upper link 44C extend at the same inclination angle with respect to the horizontal plane so as to move upward toward the rear. The connecting member 44D extends in the machine width direction, and connects the midway portion of the first lower link 44A in the front-rear direction and the midway portion of the second lower link 44B in the front-rear direction.

  The first lower link 44A connects the chair support 150 and the rotary cultivator 2 at one end side (left side) in the length direction (machine width direction K2) of the toolbar 43. The second lower link 44B connects the chair support 150 and the rotary cultivator 2 on the other end side (right side) of the toolbar 43 in the length direction (machine width direction K2). Specifically, the front end portion of the first lower link 44A is pivotally supported by a left bracket 160L (see FIG. 13) fixed to the left portion of the rear support frame 13R of the rotary cultivator 2 via a support shaft 161L. . A rear end portion of the first lower link 44A is pivotally supported by a support shaft 159L (see FIGS. 12 and 13) of the chair support 150. The front end portion of the second lower link 44B is pivotally supported by a right bracket 160R (see FIG. 13) fixed to the right portion of the rear support frame 13R of the rotary cultivator 2 via a support shaft 161R. The rear end of the second lower link 44B is pivotally supported by the support shaft 159R (see FIGS. 12 and 13) of the chair support 150.

  The upper link 44C connects the chair support 150 and the rotary cultivator 2 at the center of the tool bar 43 in the length direction (machine width direction K2). Specifically, the front end portion of the upper link 44C is pivotally supported by a central bracket 160M (see FIG. 13) fixed to the upper portion of the transmission case 12 of the rotary cultivator 2 via a support shaft 161M. The rear end of the upper link 44C is pivotally supported by the support shaft 156 of the chair support 150.

  In the working machine coupling mechanism 41 having the above configuration, when the lower links 44A and 44B swing up and down around the support shafts 161L and 161R by the drive of the lifting drive device 42, the upper link 44C moves up and down around the support shaft 161M. Rock to. As a result, the chairs (the first front chair 187A and the second front chair 187B) supported by the chair support 150 and the transplanter 3 are integrally moved up and down. Here, since the connecting link mechanism 44 is configured by a parallel link mechanism, the chairs 187A and 187B and the transplanter 3 move up and down in parallel with the ground.

  As shown in FIGS. 13 and 14, the lifting drive device 42 has a lifting cylinder (hydraulic actuator) C1. The lift cylinder C1 is composed of a hydraulic cylinder having a cylinder body C1a and a piston rod C1b. The tip end portion of the piston rod C1b is pivotally supported by the upper support shaft 162. The upper support shaft 162 is attached to a middle portion of the upper link 44C in the front-rear direction. The bottom side of the cylinder body C1a is pivotally supported by the lower support shaft 163. As shown in FIGS. 6 and 15, the lower support shaft 163 is attached to the shaft attachment member 164. The shaft attachment member 164 has a front portion attached to an upper portion of the rear support frame 13R of the rotary machine frame 11 and a rear portion attached to an upper portion of the intermediate member 196C.

  As shown in FIG. 14, when the elevating cylinder C1 is extended (the piston rod C1b is advanced from the cylinder body C1a), the upper link 44C and the lower links 44A and 44B swing upward and are supported by the chair support 150. The chairs (the first front chair 187A and the second front chair 187B) and the transplanter 3 (machine frame 37) rise. Further, when the lifting cylinder C1 is shortened (the piston rod C1b is retracted), the upper link 44C and the lower links 44A, 44B swing downward, and the chair supported by the chair support 150 (the first front chair 187A and The second front chair 187B) and the transplanter 3 (machine frame 37) descend.

  The lifting drive device 42 is connected to a control valve 165 (see FIG. 35) that controls the lifting cylinder C1. The control valve 165 is connected to the cylinder body C1a of the lifting cylinder C1 via a hydraulic hose, and is also connected to a hydraulic pump and a hydraulic oil tank. The hydraulic pump and the hydraulic oil tank are mounted on the work machine 1. The control valve 165 supplies the operating oil to the bottom side of the cylinder body C1a to extend the elevating cylinder C1 by switching the flow of the operating oil in the operating oil tank, or extends the operating oil to the rod side of the cylinder body C1a. It can be supplied to shorten the lifting cylinder C1.

  The lifting drive device 42 may be configured by an electric cylinder (electric actuator) or an electric hydraulic cylinder (electric hydraulic actuator). The electric cylinder is an electrically driven cylinder, and is, for example, a cylinder that moves a ball screw nut by rotating a ball screw around an axis by an electric motor and moves the rod forward and backward by the movement of the ball screw nut. The electric hydraulic cylinder is, for example, an actuator in which an electric motor, an oil tank, a hydraulic pump, a valve, a hydraulic cylinder, and the like are integrated, and the rotation of the electric motor causes the hydraulic pump to rotate and the valve to be switched to operate the hydraulic cylinder. It is a cylinder.

Next, the machine frame 37 of the transplanter 3 will be described with reference to FIGS.
Since the first machine casing 37A and the second machine casing 37B have the same configuration, only the first machine casing 37A will be described, and the description of the second machine casing 37B will be omitted.
The machine casing 37 has a main frame 65 and a connecting bracket 61. A seedling supply device 38A, a planting device 39A, a soil cover device 40A, etc. are mounted on the main frame 65 of the first machine casing 37A, and a seedling supply device 38B, a planting device 39B, and a soil cover device are mounted on the main frame 65 of the second machine casing 37B. 40B etc. are mounted.

  The connection bracket 61 is a member that connects the main frame 65 to the toolbar 43. The connecting bracket 61 includes a mounting wall 61a that abuts on the upper surface of the tool bar 43 so as to be movable in the machine width direction K2, a side wall 61b extending upward from the left end of the mounting wall 61a, and a right end of the mounting wall 61a upward. The other side wall 61c is extended. The attachment wall 61a is fixed to the tool bar 43 by a fixture 77 having a U bolt or the like. Therefore, by loosening the fixture 77, the position of the machine frame 37 in the machine width direction K2 can be changed (adjusted). That is, the connecting bracket 61 is movable in the machine width direction K2 along the tool bar 43.

  As shown in FIG. 20, the connecting bracket 61 of the first machine frame 37A (hereinafter, also referred to as “first mounting tool 61A”) and the connecting bracket 61 of the second machine frame 37B (hereinafter, also referred to as “second mounting tool 61B”). It is arranged side by side in the machine width direction K2. The first mounting tool 61A and the second mounting tool 61B are movably mounted along the tool bar 43, respectively. As a result, the first transplant unit 36A and the second transplant unit 36B can be moved along the toolbar 43, respectively. Since the first transplantation unit 36A and the second transplantation unit 36B are movable along the toolbar 43, respectively, the distance between the first transplantation unit 36A and the second transplantation unit 36B can be adjusted.

That is, the transplanter 3 includes an adjustment mechanism that adjusts the distance between the first transplant unit 36A and the second transplant unit 36B. Hereinafter, for convenience of explanation, this adjusting mechanism is referred to as a “distance adjusting mechanism”. The distance adjusting mechanism has a connecting bracket 61 (first mounting tool 61A) of the first machine frame 37A and a connecting bracket 61 (second mounting tool 61B) of the second machine frame 37B.
The main frame 65 has a plurality of frame members (first frame member 65a to nineteenth frame member 65t) formed of square pipes. The first frame member 65a constitutes the upper left part of the main frame 65, and is arranged so as to extend in the front-rear direction K1. The second frame member 65b constitutes the right part of the upper portion of the main frame 65 and is arranged so as to extend in the front-rear direction K1. The third frame member 65c connects the front portions of the first frame member 65a and the second frame member 65b. The fourth frame member 65d and the fifth frame member 65e connect the rear portions of the first frame member 65a and the second frame member 65b. The fourth frame member 65d is located in front of the fifth frame member 65e. The sixth frame member 65f is arranged above the main frame 65 and substantially in the center in the machine width direction K2.

  The sixth frame member 65f and the seventh frame member 65g are arranged so as to extend in the front-rear direction K1. The sixth frame member 65f is located above the main frame 65. The seventh frame member 65g is located below the main frame 65. The eighth frame member 65h connects the central portion of the third frame member 65c in the machine width direction K2 and the front end portion of the seventh frame member 65g. The nineteenth frame member 65t connects the second frame member 65b and the sixth frame member 65f. The nineteenth frame member 65t is arranged behind the third frame member 65c and in front of the fourth frame member 65d. The ninth frame member 65i connects the nineteenth frame member 65t and the seventh frame member 65g. The tenth frame member 65j connects the fourth frame member 65d and the seventh frame member 65g. The ninth frame member 65i is located in front of the tenth frame member 65j.

  The eleventh frame member 65k is located between the first frame member 65a and the sixth frame member 65f, and extends downward from the third frame member 65c. The twelfth frame member 65m is located between the second frame member 65b and the sixth frame member 65f and extends downward from the third frame member 65c. The connection bracket 61 is arranged between the eleventh frame member 65k and the twelfth frame member 65m. One side wall 61b of the connecting bracket 61 is fixed to the eleventh frame member 65k, and the other side wall 61c is fixed to the twelfth frame member 65m.

  The thirteenth frame member 65n extends downward from the rearward portion of the first frame member 65a. The thirteenth frame member 65n is arranged in parallel with the tenth frame member 65j. The fourteenth frame member 65o extends downward from the rear end of the first frame member 65a. The fifteenth frame member 65p extends downward from a portion of the second frame member 65b near the rear side. The fifteenth frame member 65p is arranged in parallel with the ninth frame member 65i. The sixteenth frame member 65q extends downward from the rear end of the second frame member 65b. The seventeenth frame member 65r connects the lower ends of the fourteenth frame member 65o and the sixteenth frame member 65q. The eighteenth frame member 65s extends upward from the front portion of the seventh frame member 65g.

  The first mounting plate 65u is fixed over the lower portion of the eleventh frame member 65k and the lower portion of the twelfth frame member 65m. A front plate 78La provided at the front part of the first planted frame 78L is bolted to the left part of the first attachment plate 65u. A front plate 78Ra provided at the front of the second planted frame 78R is bolted to the right part of the first mounting plate 65u. The first planting device 39AL is attached to the first planting frame 78L. The first planting device 39AR is attached to the second planting frame 78R.

As shown in FIG. 18, an adjustment groove 66L and an adjustment hole 67L are provided on the left part of the first mounting plate 65u. The adjustment groove 66L is provided above the adjustment hole 67L. An adjustment groove 66R and an adjustment hole 67R are provided on the right portion of the first mounting plate 65u. The adjustment groove 66R is provided above the adjustment hole 67R.
Two adjustment grooves 66L are provided side by side with an interval in the machine width direction K2. The two adjustment grooves 66L are arranged along a downwardly convex arc-shaped line. The adjusting holes 67L are provided in a plurality (five) side by side in the machine width direction K2 at intervals.

  A bolt B1 is inserted into each of the two adjustment grooves 66L, and the bolt B1 is inserted into a through hole in the upper portion of the front plate 78La and fastened with a nut. A bolt B2 is inserted into one of the plurality of adjustment holes 67L, and the bolt B2 is inserted into a through hole in the lower portion of the front plate 78La and fastened with a nut. That is, the front plate 78La is attached to the left part of the first attachment plate 65u at a total of three points, that is, the upper portion is two points (two bolts B1) and the lower portion is one point (one bolt B2).

  By moving the bolt B1 inserted in the adjustment groove 66L along the adjustment groove 66L and changing the adjustment hole 67L in which the bolt B2 is inserted among the plurality of adjustment holes 67L, the first mounting plate 65u is changed. The mounting angle of the first planted frame 78L with respect to can be changed (see the left part of FIG. 18, the phantom line and the double-headed arrow in FIG. 19). Thereby, the attachment angle of the first planting device 39AL with respect to the first attachment plate 65u can be changed. In other words, the inclination angle of the first planting device 39AL with respect to the vertical line can be changed.

Two adjustment grooves 66R are provided side by side with an interval in the machine width direction K2. The two adjustment grooves 66R are arranged along a downwardly convex arcuate line. 67 R of adjustment holes are provided in a line (5) at intervals in the machine width direction K2.
A bolt B3 is inserted into each of the two adjustment grooves 66R, and the bolt B3 is inserted into a through hole in the upper portion of the front plate 78Ra and fastened with a nut. A bolt B4 is inserted into one of the plurality of adjustment holes 78Ra, and the bolt B4 is inserted into a through hole in the lower portion of the front plate 78Ra and fastened with a nut. That is, the front plate 78Ra is attached to the right part of the first attachment plate 65u at a total of three points, that is, the upper portion has two points (two bolts B3) and the lower portion has one point (one bolt B4).

  By moving the bolt B3 inserted through the adjustment groove 66R along the adjustment groove 66R, and changing the adjustment hole 67R through which the bolt B4 is inserted among the plurality of adjustment holes 67R, the first mounting plate 65u. The attachment angle of the second planted frame 78R with respect to can be changed (see the phantom line and the double-headed arrow in the right part of FIG. 18). Thereby, the attachment angle of the first planting device 39AR with respect to the first attachment plate 65u can be changed. In other words, the inclination angle of the first planting device 39AR with respect to the vertical line can be changed.

  As described above, it is possible to adjust the relative angle between the first planting device 39AL and the first planting device 39AR by using the adjustment grooves 66L, 66R and the adjustment holes 67L, 67R. That is, the adjustment grooves 66L and 66R and the adjustment holes 67L and 67R are angle adjustment mechanisms capable of adjusting the relative angle between the plurality of first planting devices (the first planting device 39AL and the first planting device 39AR). Hereinafter, referred to as a "first angle adjusting mechanism"). The first angle adjusting mechanism can individually adjust the mounting angles of the plurality of first planting devices (the first planting device 39AL and the first planting device 39AR) with respect to the first machine casing 37A.

  The second machine casing 37B is also provided with the same angle adjusting mechanism as that of the first machine casing 37A described above. The angle adjusting mechanism (hereinafter, referred to as “second angle adjusting mechanism”) provided in the second machine casing 37B can adjust the relative angle between the second planting apparatus 39BL and the second planting apparatus 39BR. That is, the second angle adjusting mechanism can adjust the relative angle between the plurality of second planting devices (the second planting device 39BL and the second planting device 39BR). The second angle adjusting mechanism can individually adjust the mounting angles of the plurality of second planting devices (the second planting device 39BL and the second planting device 39BR) with respect to the second machine casing 37B.

According to the first angle adjusting mechanism, it is possible to adjust the interval (row distance) between the seedling planting position of the first planting apparatus 39AL and the seedling planting position of the first planting apparatus 39AR. According to the second angle adjusting mechanism, it is possible to adjust the interval (row distance) between the planting position of the seedlings by the second planting device 39BL and the planting position of the seedlings by the second planting device 39BR.
The first planted frame 78L and the second planted frame 78R may be attached to the machine casing 37 (the first machine casing 37A and the second machine casing 37B) so that the positions thereof can be adjusted in the machine width direction K2. Good.

  As shown in FIGS. 16 to 18, the second mounting plate 65v is fixed over the lower portion of the tenth frame member 65j and the lower portion of the thirteenth frame member 65n. The third mounting plate 65w is fixed over the lower portion of the ninth frame member 65i and the lower portion of the fifteenth frame member 65p. The rear portion of the first soil covering device 40AL is attached to the second attachment plate 65v. The rear portion of the first soil covering device 40AR is attached to the third attachment plate 65w.

  As shown in FIGS. 2 and 20, the working machine 1 includes a connection frame 130 that connects the first transplantation unit 36A and the second transplantation unit 36B. As shown in FIG. 21, the connection frame 130 includes a first connection frame member 131, a second connection frame member 132, a third connection frame member 133, a fourth connection frame member 134, a fifth connection frame member 135, and a sixth connection member. It has a frame material 136.

  As shown in FIG. 20, the first connection frame member 131 extends in the machine width direction and connects the rear part of the first machine frame 37A and the rear part of the second machine frame 37B. As shown in FIGS. 20 and 21, the second connecting frame member 132 is attached to the central upper surface of the first connecting frame member 131 in the machine width direction and extends upward from the upper surface. The third connection frame member 133 extends forward from a midway portion of the second connection frame member 132 in the vertical direction. The front portion of the third connection frame member 133 is connected to the second support body 152 of the chair support body 150. The fourth connection frame member 134 extends upward from a position closer to the front of the third connection frame member 133. The fifth connection frame member 135 connects the upper part of the second connection frame member 132 and the upper part of the fourth connection frame member 134. The sixth connecting frame member 136 extends downward from a position closer to the front of the third connecting frame member 133. The lower end of the sixth connecting frame member 136 is attached to the upper part of the tool bar 43.

  By connecting the first transplantation unit 36A and the second transplantation unit 36B with the connection frame 130, the height of the first transplantation unit 36A and the height of the second transplantation unit 36B can be made uniform. Therefore, the planting depths of the seedlings planted in the first transplantation unit 36A and the seedlings planted in the second transplantation unit 36B can be made uniform. Further, it is possible to accurately adjust the spacing between the seedlings planted in the first transplantation unit 36A and the seedlings planted in the second transplantation unit 36B.

  As shown in FIGS. 21 to 23, stands 137L and 137R are attached to the connection frame 130. The stand 137L is attached to the left end of the first connecting frame member 131. The stand 137R is attached to the right end portion of the first connecting frame member 131. The stands 137L and 137R can change their postures between a standing posture that extends downward from the first connecting frame member 131 and a folding posture that extends inward in the machine width along the first connecting frame member 131. 21 and 22, the folding postures of the stands 137L and 137R are shown by solid lines, and the standing postures are shown by imaginary lines. FIG. 23 shows the standing postures of the stands 137L and 137R.

  By placing the stands 137L and 137R in a standing posture and grounding the lower ends of the stands 137L and 137R, the transplanter 3 can be floated from the ground and supported. Therefore, the working machine 1 can be easily stored and transported, and the transplanter 3 can be easily attached to and detached from the rotary cultivator 2. When performing work (transplanting work, etc.), the stands 137L and 137R are in a folded posture.

A housing 166 for housing the control valve 165 and the like is attached to the connection frame 130. The container 166 is attached to an upper portion of the third connecting frame member 133 and a front portion of the fourth connecting frame member 134. A first operating lever 167 and a second operating lever 168 for operating the control valve 165 and the like project from the upper portion of the container 166.
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 24, a seventh gear (bevel gear) G7 is provided at the rear end of the output shaft 32 that transmits the 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 main shaft 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 FIGS. 20 and 24, the main shaft 107 extends in the machine width direction K2 at right angles to the output shaft 32. As shown in FIG. 20, the main shaft 107 is provided across the first machine frame 37A and the second machine frame 37B. The main shaft 107 is composed of a plurality of shafts and a connecting shaft that interlocks and connects the shafts, and is expandable / contractible corresponding to the position adjustment of the machine casings 37A, 37B in the machine width direction K2. The main shaft 107 receives power from the prime mover E1 transmitted from the output shaft 32 and rotates. Power is transmitted from the main shaft 107 to the seedling supplying device 38 and the planting device 39 of each transplantation unit 36A, 36B.

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

  As shown in FIGS. 24 and 25, the main shaft 107 has a rotating shaft (first rotating shaft 107A, second rotating shaft 107B, third rotating shaft 107C) and connecting shafts 107L and 107R. The first rotating shaft 107A rotates by receiving power from the prime mover E1. The second rotating shaft 107B rotates by receiving power from the first rotating shaft 107A. The second rotating shaft 107B is composed of a left shaft 107B1 and a right shaft 107B2 connected by a coupling CP. The third rotating shaft 107C rotates by receiving power from the second rotating shaft 107B.

  An eighth gear G8 that meshes with the seventh gear G7 is provided at the left end of the first rotating shaft 107A, and the first rotating shaft 107A rotates by receiving the power transmitted from the output shaft 32. The connecting shaft 107L connects the right end of the first rotating shaft 107A and the left end of the second rotating shaft 107B. The connecting shaft 107R connects the right end of the second rotating shaft 107B and the left end of the third rotating shaft 107C.

  The first rotating shaft 107A, the second rotating shaft 107B, and the third rotating shaft 107C are spline shafts having unevenness in the circumferential direction. The connecting shafts 107L and 107R are tubular spline bearings with which the spline shafts mesh. The first rotating shaft 107A and the second rotating shaft 107B are movable with respect to the connecting shafts 107L and 107R in the width direction of the transplanter 3 (the same as the machine width direction K2). In other words, the first rotating shaft 107A and the second rotating shaft 107B can move in the machine width direction K2 (left or right) by changing the length of the meshing portion with the connecting shafts 107L and 107R. As shown in FIG. 25, by moving the first rotary shaft 107A and the second rotary shaft 107B in the machine width direction K2 with respect to the connecting shafts 107L and 107R, the main shaft 107 can expand and contract in the machine width direction K2. That is, by sliding the spline shaft with respect to the spline bearing, the main shaft 107 can expand and contract in the machine width direction K2.

  The outer periphery of the main shaft 107 is covered with a cover cylinder 110 extending in the machine width direction K2. The cover cylinder 110 is formed by rolling a flexible sheet (for example, a resin sheet) into a cylindrical shape. As shown in FIG. 26, the cover cylinder 110 is rounded so as to have an overlapping portion OL in the circumferential direction. The diameter of the cover cylinder 110 can be increased or decreased by changing the length of the overlapping portion OL. Thereby, it is possible to deal with the main shafts 107 having various thicknesses. Further, the cover cylinder 110 can be opened without any overlapping portion. Thus, after mounting the main shaft 107, the outer circumference of the main shaft 107 can be covered with the cover cylinder 110.

As shown in FIG. 25, the cover cylinder 110 includes a plurality of cover cylinders (first cover cylinder 110A and second cover cylinder 110B). The plurality of cover cylinders 110A and 110B are movable in the machine width direction K2 along the main shaft 107. The first cover cylinder 110A covers the outer circumference of the connecting shaft 107L. The second cover cylinder 110B covers the outer periphery of the connecting shaft 117R.
Since the outer periphery of the main shaft 107 is covered with the cover cylinder 110, the first rotating shaft 107A, the second rotating shaft 107B, the third rotating shaft 107C, and the connecting shafts 107L and 107R that form the main shaft 107 are protected from the outside. be able to. Further, since the cover cylinder 110 includes the plurality of cover cylinders 110 that are movable in the machine width direction along the main shaft 107, expansion and contraction of the main shaft 107 in the machine width direction K2 can be dealt with.

The power transmitted to the main shaft 107 (the first rotating shaft 107A, the second rotating shaft 107B, the third rotating shaft 107C, and the connecting shafts 107L and 107R) is transmitted through the power transmission mechanism to the first transplant unit 36A and the second transplant unit 36B. Be transmitted to. As shown in FIG. 11, the transmission mechanism includes a first transmission mechanism 115a to a twelfth transmission mechanism 115m.
As shown in FIGS. 11, 24, and 27, the power transmitted to the main shaft 107 is transmitted to the first shaft 111 via the first transmission mechanism (chain winding transmission mechanism) 115a. Further, the power transmitted to the main shaft 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) 115g, and the eighth transmission mechanism 115h, the third shaft It is transmitted to the left first planting device 39AL via 113 and the ninth transmission mechanism 115i. The power transmitted to the second shaft 112 is transmitted to the right second planting device 39BR 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 left second planting device 39BL via the twelfth 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. 27 and 28 will be described to describe the second planting device 39B. The description of the structure is omitted. The left first planting device 39AL and the right first planting device 39AR are configured in the same manner except that they are configured symmetrically, and thus the description of common parts will be omitted.

As shown in FIGS. 27 and 28, the first planting device 39AL and the first planting device 39AR are arranged side by side in the machine width direction K2 and 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 includes a planting tool 64 and a planting lifting mechanism 139. The 1st planting apparatus 39AR has the planting implement 64 and the planting raising / lowering mechanism 139 similarly to the 1st planting apparatus 39AL.

Hereinafter, the planting tool 64 in the first planting apparatus 39AL may be referred to as a planting tool 64AL, and the planting tool 64 in the first planting apparatus 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 planting tool 64 has a beak shape with its tip facing downward (see FIG. 27) and has a front structural body 140 and a rear structural body 141. The planting tool 64 is openable / closable by the front component 140 and the rear component 141 being separated and approached in the front-rear direction K1. The front component 140 and the rear component 141 are biased in a closing direction by a tension spring.

  As shown in FIG. 27, the seventh transmission mechanism 115g includes a drive sprocket 116R that rotates integrally with the first shaft 111, a driven sprocket 117R supported by the first planted frame 78R via a support shaft 118R, and a drive sprocket. 116R and a driven sprocket 117R, and a chain 119R wound around the driven sprocket 117R. Power is transmitted from the first shaft 111 to the support shaft 118R by the seventh transmission mechanism 115g, and the support shaft 118R rotates.

  The ninth transmission mechanism 115i extends over the drive sprocket 116L that integrally rotates with the third shaft 113, the driven sprocket 117L supported by the second planted frame 78L via the support shaft 118L, the drive sprocket 116L, and the driven sprocket 117L. It has a chain 119L wound around. 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 similarly to the seventh transmission mechanism 115g. By the tenth transmission mechanism 115j, power is transmitted from the second shaft 112 to the support shaft 118R of the right second planting device 39BR, and the support shaft 118R of the second planting device 39BR rotates.
The twelfth transmission mechanism 115m is configured similarly to the ninth transmission mechanism 115i. Power is transmitted from the fourth shaft 114 to the support shaft 118L of the left second planting device 39BL by the twelfth transmission mechanism 115m, and the support shaft 118L of the second planting device 39BL rotates.

As shown in FIGS. 27 and 28, the planting lifting mechanism 139 is a device that supports the planting tool 64 and moves the planting tool 64 up and down. Specifically, the planting lifting mechanism 139AL is a device for raising and lowering the planting implement 64AL, and the planting lifting mechanism 139AR is a device for raising and lowering the planting implement 64AR.
The planting lifting mechanism 139 includes a first case 120, a second case 121, and a mounting member 122. The first case 120 of the planting lifting mechanism 139L is rotatably supported by the first planting frame 78L via a support shaft 118L. The first case 120 of the planting lifting mechanism 139R 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 as the support shafts 118L and 118R rotate. In the first case 120 and the second case 121, when the first case 120 rotates about one of the horizontal axes, the second case 121 moves to the first case 120 in association 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).

By rotating the first case 120 and the second case 121, the mounting member 122 moves in parallel in the vertical direction while moving in the front-back direction, and the planting tool 64 draws a long elliptical trajectory in the vertical direction and moves vertically. (Up and down).
The seedlings are dropped and supplied to the planting implement 64 at the raised position (top dead center position). At this time, the planting tool 64 is in a closed state, and the seedlings are accommodated and held inside the planting tool 64. After that, the planting tool 64 holds the seedlings and descends, and the lower part thereof rushes into the field. In addition, the planting tool 64 opens when it enters the field, forms a planting hole in the field, and drops the seedlings downward while releasing the seedlings. As a result, seedlings are planted in the field.

In the planting device 39 having the above configuration, the planting tool 64 reciprocates up and down once when the support shafts 118L and 118R rotate once.
The first planting device 39AL and the first planting device 39AR are arranged side by side in the machine width direction K2 and at different positions in the front-rear direction K1. In this way, one transplant unit is used to stagger two rows of seedlings in a ridge (one of the seedlings adjacent in the machine width direction K2 is displaced to the front or rear with respect to the other).

In the present embodiment, the left and right implanters 64 move up and down at the same time. Further, when the planting tool 64 stops, the left and right planting tools 64 stop at the top dead center position.
As shown in FIG. 11, the transplanter 3 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 lifting 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 including the assist device 123, even if the electromagnetic clutch 24 is disengaged before the top dead center, it is possible to prevent the situation in which the planting tool 64 reverses due to inertia until it reaches the top dead center.

Next, the soil covering device 40 will be described.
Since the first soil covering device 40A and the second soil covering device 40B have the same structure, 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 first soil covering device 40AL and the first soil covering device 40AR have the same configuration, 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 FIGS. 29 to 32, the first soil covering device 40AL includes a plurality of soil covering devices (first soil covering device 81L, second soil covering device 81R), and a support frame 82 that supports the soil covering devices 81L and 81R. Have. In the case of the present embodiment, since the soil cover 81L, 81R is the soil cover ring, hereinafter, the soil cover 81L, 81R will be referred to as the soil cover 81L. 81R will be described.
81 L of soil-covering rings and 81 R of soil-covering rings contact | abut on the field upper surface (ground) behind the planting tool 64, rotate, and soil the root part of the planted seedling, covering it and suppressing the root part of the seedling.

The soil cover ring 81L and the soil cover ring 81R can move up and down independently of each other, and move up and down following the unevenness of the field. When the planting device 39 is positionally adjustable in the machine width direction K2, the soil cover device 40 is configured to be positionally adjustable in the machine width direction K2.
81 L of soil-covering wheels and 81 R of soil-covering wheels function as the detection member 83 which detects the ground height of the machine frame 37. The height above ground of the machine casing 37 is the relative height of the lower end of the machine casing 37 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 2. When a ridge is formed in the field, the planting surface is the upper surface of the ridge.

  The detection member 83 (covering wheel 81L and covering wheel 81R) is attached to a rear portion of a support frame 82 that is supported by the machine frame 37 so as to be vertically swingable. The support frame 82 supports the detection member 83 with respect to the machine frame 37 so as to be vertically movable. The support frame 82 is provided at its front portion with a cylindrical boss 84 having an axis in the machine width direction K2. The boss 84 is supported by a support rod 85 provided on the machine frame 37. The support rod 85 has an axis extending in the machine width direction K2 and is supported by a support member 86 extending downward from the seventh frame member 65g via a bearing. The support rod 85 is rotatable about an axis extending in the machine width direction K2. The boss 84 is fitted on the outer periphery of the support rod 85 and is rotatable with the support rod 85 around the axis. The boss 84 is fitted to the support rod 85 so as to be movable in the machine width direction K2. As a result, the support frame 82 can swing up and down and its position can be adjusted in the machine width direction K2. When the support frame 82 swings up and down, the detection member 83 can move up and down.

  The boss 84 can be fixed to the support rod 85 by a fixture at an arbitrary position in the machine width direction K2. Specifically, the support rod 85 is provided with a plurality of through holes 85a at intervals in the machine width direction K2, and the fixing tool (pin) 87 is inserted into the through hole 85a on the left side and the right side of the boss 84, respectively. By doing so, the position of the boss 84 in the machine width direction can be determined. By changing the position of the boss 84 in the machine width direction and changing the position of the through hole 85a into which the fixture (pin) 87 is inserted, the position of the boss 84 in the machine width direction is changed and positioned. You can By changing the position of the boss 84 in the machine width direction, the position of the front portion of the support frame 82 can be adjusted in the machine width direction. Hereinafter, a mechanism for adjusting the position of the front portion of the support frame 82 in the machine width direction is referred to as a "front portion position adjusting mechanism".

  As shown in FIGS. 30 to 32, the support frame 82 is arranged so as to pass above the detection member 83 (covering wheel 81L and covering wheel 81R). The support frame 82 has a left rear portion 82a which is arranged above the earth covering wheel 81L and extends in the front-rear direction, and a right rear portion 82b which is arranged above the earth covering wheel 81R and extends in the front-rear direction. The earth covering wheel 81L is attached to the left rear portion 82a via a mounting plate 88L. The earth covering wheel 81R is attached to the right rear portion 82b via a mounting plate 88R.

The support frame 82 also has a connecting portion 82c that connects the rear portion of the left rear portion 88a and the rear portion of the right rear portion 88b, and a front portion 82d that extends forward from the left rear portion 88a.
The rod member 90 is attached to the connecting portion 82c via attachment stays 89U and 89D. The attachment stay 89U is attached to the lower portion of the rod member 90. The attachment stay 89D is attached to the connecting portion 82c. A lower shaft 91 extending in the machine width direction K2 is attached to the attachment stays 89U and 89D. The lower portion of the rod member 90 is supported rotatably around the axis of the lower shaft 91. The upper portion of the rod member 90 is inserted into a through hole provided in the upper shaft 92 arranged above the lower shaft 91. The upper shaft 92 is supported by a shaft support member 93 mounted on the second mounting plate 65v, and is rotatable about an axis center in the machine width direction. The rod member 90 tilts and moves up and down as the detection member 83 moves up and down.

  As shown in FIGS. 33 and 34, the second mounting plate 65v provided on the first machine frame 37A is provided with a plurality of through holes 68 at intervals in the machine width direction. The shaft support member 93 is attached to the second attachment plate 65v by the bolt B5 inserted in the through hole 68. The position of the shaft support member 93 with respect to the second mounting plate 65v can be changed in the machine width direction by changing (shifting) the position of the through hole 68 through which the bolt B5 is inserted in the machine width direction K2. As a result, the positions of the rod member 90 and the rear portion of the support frame 82 can be adjusted in the machine width direction K2, as shown in phantom in FIG. Hereinafter, a mechanism for adjusting the position of the rear portion of the support frame 82 in the machine width direction is referred to as a "rear position adjusting mechanism".

  The front position adjusting mechanism and the rear position adjusting mechanism constitute an adjusting unit (first position adjusting unit) for adjusting the position of the first soil covering device 40A in the machine width direction K2. That is, the transplanter 3 has an adjusting unit (first position adjusting unit) that adjusts the position of the first soil covering device 40A in the machine width direction. In addition, the transplanter 3 has an adjusting unit (second position adjusting unit) that adjusts the position of the second soil covering device 40B in the machine width direction. The configuration of the second position adjusting unit is the same as the configuration of the first position adjusting unit, and thus description thereof will be omitted.

As shown in FIG. 33 and the like, a weight 94 is placed on the mounting stay 89U. The rod member 90 penetrates the weight 94. The weight 94 pushes the rear portion (joint portion 82c) of the support frame 82 downward to ground the detection member 83 (covering wheels 81L, 81R).
As shown in FIGS. 29 and 31, the front end portion of the front portion 82d of the support frame 82 is attached to the boss 84 via the attachment plate 95. As a result, the support rod 85 rotates about the axis along with the vertical swing of the support frame 82. A first swing plate 96 is attached to the support rod 85. The rear portion of the first swing plate 96 is fixed to the support rod 85, and the front portion swings up and down as the support rod 85 rotates (see FIG. 30).

  As shown in FIG. 32, one end (lower end) of a wire (cable) 97 is connected to the front part of the first swing plate 96. The wire 97 is covered with the outer shell body 98 at a midway portion except for one end portion and the other end portion, and is movable (movable / retractable) along the outer shell body 98. One end portion (lower end portion) of the outer shell body 98 is fixed to a front projecting member 99 that projects forward from the support member 240. One end of the wire 97 projects from one end of the outer shell body 98 and is connected to the front part of the first swing plate 96.

The first swing plate 96 to which the wire 97 is connected may be provided on only one of the support rod 85 that supports the first soil covering device 40A and the support rod 85 that supports the second soil covering device 40B. . That is, only one wire 97 is required regardless of the number of soil covering devices.
As shown in FIG. 35, the other end portion (upper end portion) of the outer shell body 98 is fixed to the second swing plate 100 housed in the housing body 166. The second swing plate 100 is connected to the lower end portion of the first operation lever 167. The first operating lever 167 projects upward from a groove 166a (see FIG. 21) formed in the upper portion of the container 166, and can swing in the front-rear direction along the groove 166a. The first operation lever 167 can be selectively stopped at a plurality of positions in the front-rear direction along the groove 166a. By stopping the first operating lever 167, the position of the second swing plate 100 and the position of the other end of the outer shell body 98 are determined.

  As shown in FIG. 35, the other end (upper end) of the wire 97 is connected to the swing piece 165 a of the control valve 165 which is projected from the other end of the outer shell 98 and is housed in the housing 166. . The swing piece 165a is connected to the spool of the control valve 165. With the swing of the swing piece 165a, the spool of the control valve 165 moves to switch the flow of hydraulic oil. As a result, hydraulic oil is supplied to the bottom side or rod side of the cylinder body C1a, and the lift cylinder C1 extends or shortens.

  When the detection member 83 (covering wheels 81L, 81R) moves up and down following the unevenness of the field, the support frame 82 moves up and down, and the boss 84 and the support rod 85 rotate around the axis in the machine width direction. As a result, the front portion of the first swing plate 96 moves up and down, and the wire 97 moves upward or downward. The control valve 165 switches the raising / lowering drive device 42 between the first state in which the machine casing 37 is raised and the second state in which the machine casing 37 is lowered in accordance with the movement of the wire 97. Specifically, when the detection member 83 moves upward, the wire 97 moves upward, the control valve 165 shortens the lifting cylinder C1 of the lifting drive device 42, and the machine casing 37 (implanter 3) rises. When the detection member 83 moves downward, the wire 97 moves downward, the control valve 165 extends the lifting cylinder C1 of the lifting drive device 42, and the machine frame 37 (implanter 3) descends. As a result, it is possible to prevent variations in planting depth of seedlings due to unevenness in the field.

  Further, as indicated by a phantom line in FIG. 36, by swinging the first operation lever 167 in the front-back direction, the second swing plate 100 swings in the vertical direction. With the swing of the second swing plate 100, the position of the other end of the outer shell body 98 fixed to the second swing plate 100 can be changed in the vertical direction. As a result, the relative positional relationship between the detection member 83 and the wire 97 changes, so that the amount of movement of the wire 97 due to the vertical movement of the detection member 83 can be adjusted. Therefore, the planting depth set based on the detection result by the detection member 83 can be changed. That is, by swinging the first operation lever 167, the planting depth (relationship between the height of the detecting member 83 and the planting depth) based on the detection result by the detection member 83 can be changed.

  More specifically, the planting depth corresponding to the detection result of the detection member 83 (height of the detection member 83) is preset, and the detection result of the detection member 83 is determined by the movement amount of the wire 97. Therefore, the first operation lever 167 is swung to change the reference position of movement of the wire 197 (position of the outer shell body 98), and the amount of movement of the wire 97 accompanying the vertical movement of the detection member 93 is increased or decreased (detection member By changing the correspondence between the magnitude of the vertical movement of 83 and the movement amount of the wire 97), the planting depth corresponding to the vertical movement of the detection member 93 can be changed.

  Further, as shown in FIG. 35, a third swing plate 169 is attached to the lower end of the second operation lever 168. The third swing plate 169 is connected to the spool of the control valve 165 via the wire 170. Also by swinging the second operating lever 168 in the front-back direction, the control valve 165 is operated to move the elevator drive device 42 into the first state in which the machine frame 37 is raised and the second state in which the machine frame 37 is lowered. You can switch.

The raising / lowering control of the transplanter 3 according to the unevenness of the field is performed independently of the rotary cultivator 2 mounted on the rear part of the tractor 1A. Thereby, the planting precision of the seedlings can be improved.
Next, the seedling supply device 38 will be described.
As shown in FIG. 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 the 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 is illustrated and described in FIGS. 37 to 42, and the second seedling supply device 38B. Is omitted.

As shown in FIGS. 3, 20, and 37, 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 casing 37B.
As shown in FIGS. 20 and 37, the seedling feeding device 38 has a large number of feeding cups 171 and 172 into which seedlings are put. The plurality of supply cups includes a plurality of first supply cups 171 and a plurality of second supply cups 172. In the case of this embodiment, there are 11 first supply cups 171 and 11 second supply cups 172, and the total number of supply cups is 22. The 1st supply cup 171 and the 2nd supply cup 172 are arrange | positioned along the loop-shaped transfer path R1 extended in the front-back 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 present an ellipse elongated in the front-rear direction K1 in a plan view. Moreover, the 1st supply cup 171 and the 2nd supply cup 172 are alternately arrange | positioned along the oval transfer path R1.
As shown in FIG. 20, the arrangement of the supply cups (the first supply cup 171 and the second supply cup 172) of the first seedling supply device 38A and the supply cups (the first supply cup 171 and the first supply cup 171 of the second seedling supply device 38B) are arranged. The arrangement of the two supply cups 172) is symmetrical with respect to the center line in the machine width direction K2.

  As shown in FIG. 37, the first supply cup 171 and the second supply cup 172 are intermittently transferred in the arrow Y1 direction by the transfer mechanism 177 along the transfer route R1. The transfer mechanism 177 has 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 formed by sprockets, and the cord 180 is formed by an endless (loop-shaped) chain wound around the first rotating body 178 and the second rotating body 179. ing. The first rotary body 178 and the second rotary body 179 are rotatably supported by the device frame 176 about a vertical axis (a vertical axis extending in the vertical direction). The first supply cup 171 and the second supply cup 172 are arranged on the outer peripheral side of the cord 180 along the cord 180.

  As shown in FIGS. 11 and 24, the first rotating body 178 rotates by being transmitted with 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 arrow Y1 direction (see FIG. 37). 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. 41, the first supply cup 171 includes a storage portion 181a that stores the seedling N1 to be input, a mounting portion 182a that is attached to the cord 180, and a lid 183a that closes the opening at the lower end of the storage portion 181a. Have. Similarly, the second supply cup 172 has a housing portion 181b, a mounting portion 182b, and a lid 183b. The lids 183a and 183b are hinged to the lower portions of the housing portions 181a and 181b by hinges, 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 storage portions 181a and 181b. Further, by opening the lids 183a and 183b, the seedlings N1 can be discharged downward from the accommodating portions 181a and 181b.

  As shown in FIG. 38, 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 engagement portion 184a projects to the inner peripheral side of the transfer route R1 (cord 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 180) of the supply cups 171 and 172.

  As shown in FIG. 37, in the first supply cup 171, the lid 183a opens on the left side of the transfer route R1. The first supply cup 171 indicated by reference sign OP1 is the first supply cup 171 with the lid 183a opened. Further, the position indicated by reference numeral D1 is the first open position (the 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 indicated by reference sign OP2 is the second supply cup 172 with the lid 183b opened. The position indicated by reference sign D2 is the second open position (the open position on the other side in the machine width direction) in which the lid 183b of the second supply cup 172 opens. FIG. 40 shows a state in which the lid 183b is opened at the second open position D2.

Moreover, the 1st opening position D1 and the 2nd opening position D2 are seedling dropping positions which are the positions which drop and supply seedlings to the planting implement 64. That is, the seedling supply device 38 has a seedling dropping position, which is a position where the seedlings are dropped and supplied to the planting tool 64, in the middle of the transfer route R1 in the front-rear direction.
As shown in FIG. 37, 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. Corresponding to the first open position D1 being displaced rearward with respect to the second open position D2, the left implanting device in each implanting unit is offset rearwardly with respect to the right implanting device. ing.

As shown in FIG. 38, the seedling feeding device 38 has a setting member 185 that sets the open position of the supply cups 171, 172 (the first open position D1 and the second open position D2 can be set). The setting member 185 includes a plurality of control rods (first control rod 186a to sixth control rod 186f).
The first regulating rod 186a contacts 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 regulates 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 restricting rod 186b contacts 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 restricting rod 186b restricts the opening of the lids 183a and 183b on the rear side of the first open position D1 and the second open position D2.

  The third restricting rod 186c abuts the first engaging portion 184a of the lid 183a on the front side of the first open position D1. As a result, the third restricting rod 186c restricts the opening of the lid 183a on the front side of the first open position D1. The fourth restricting rod 186d contacts the second engaging portion 184b of the lid 183b on the rear side of the second opening position D2. As a result, the fourth restricting rod 186d restricts the opening of the lid 183b on the rear side of the second opening position D2.

  The fifth restricting rod 186e is located on the left side of the first open position D1 and contacts the second engaging portion 184b of the lid 183b at the first open position D1. As a result, the opening of the lid 183b at the first open position D1 is restricted. Further, the opening of the lid 183a at the first open position D1 is allowed. The sixth restricting rod 186f is located on the left side of the second open position D2 and contacts the first engaging portion 184a of the lid 183a located at the second open position D2. This regulates the opening of the lid 183a at the second open position D2. Further, opening of the lid 183b at the second open position D2 is allowed.

  As shown in FIG. 41, 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 planting tool 64 is seeded to the planting tool 64 via the intermediate hopper 126. N1 is supplied. Further, the planting tool 64 is located below the second open position D2, and when the lid 183b opens and the seedling N1 falls, the seedling N1 is supplied to the planting tool 64 via the intermediate hopper 126. .

  As shown in FIG. 37, 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 device frame 176 has a left rod 176a, a right rod 176b, a base rod 176c, front rods 176d and 176e, rear rods 176f and 176g, intermediate rods 176h and 176i, and curved bodies 176j and 176k.

  The left rod 176a extends in the front-rear direction at the left portion of the first seedling feeding device 38A. The right rod 176b extends in the front-rear direction at the right portion of the first seedling feeding 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 part 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 part 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 176g 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 rearward of the rear rods 176f and 176g.

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

  A first rotating body 178 is rotatably supported on the front portion of the base rod 176c about a vertical axis (an axial center extending in the vertical direction). A second rotating body 179 is supported on the rear portion of the base rod 176c so as to be rotatable around the vertical axis. A first idler 251 is supported on the left side of the front rod 176d so as to be rotatable about the vertical axis. A second idler 252 is rotatably supported on the right portion of the front rod 176e about the vertical axis. A third idler 253 is rotatably supported on the left side of the rear rod 176f around the vertical axis. A fourth idler 254 is supported on the right side of the rear rod 176g so as to be rotatable about the vertical axis. A fifth idler 255 is supported on the left side of the intermediate rod 176h so as to be rotatable around the vertical axis. A sixth idler 256 is supported on the right portion of the intermediate rod 176i so as to be rotatable around the vertical axis. The first idler 251 to the sixth idler 256 are composed of sprockets. The sprocket meshes with the chain forming the rope 180 and rotates.

  The first idler 251 to the sixth idler 256 form 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 bodies (the first idler 251 to the sixth idler 256) apply tension to the outer peripheral side of the cord body 180 so that the cord body 180 does not loosen. Of the tension applying 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.

As shown in FIGS. 37, 39, and 40, the transfer mechanism 177 has a guide member 173 that guides the movement of the cord 180. The guide member 173 includes first guide members 174L and 174R and a second guide member 175.
The first guide members 174L and 174R are arranged on the outer peripheral side of the transfer path R1 (cord 180) of the supply cups 171 and 172. The first guide members 174L and 174R are attached to the device frame 176. Specifically, the first guide member 174L is attached to the upper portion of the left rod 176a of the device frame 176, and extends in the front-rear direction along the left rod 176a. The first guide member 174R is attached to the upper portion of the right rod 176b of the device frame 176 and extends in the front-rear direction along the right rod 176b.

  The first guide members 174L, 174R have extended surfaces 174La, 174Ra extending along the moving direction of the rope 180. In the case of the present embodiment, the extending surfaces 174La and 174Ra extend along the front-rear direction K1. The extending surface 174La is a surface facing right. The extended surface 174Ra is a surface facing left. The extending surface 174La and the extending surface 174Ra are arranged in parallel and opposite to each other.

An upper part of the first guide member 174L and an 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.
The second guide member 175 is attached to the cord body 180 and moves together with the cord body 180. The second guide member 175 has a mounting portion 175a, an abutting portion 175b, and a connecting portion 175c. The attachment portion 175a has an inner portion 175a1 and an outer portion 175a2. The inner position 175a1 is attached to the upper portion of the cord 180 through the pin PN. The pin PN extends upward from the cord 180, and the inner portion 175a1 has a hole through which the pin PN is inserted. The outer position 175a2 is arranged outside the inner portion 175a1 (on the side farther from the supply cups 171 and 172 than the inner portion 175a1). The outer part 175a2 and the inner part 175a1 are in contact (surface contact) or connected to each other. That is, the outer position 175a2 and the inner portion 175a1 may be integrated or separated.

  The contact portion 175b is arranged on the outer peripheral side of the cord 180, and sequentially contacts the first guide member 174L and the first guide member 174R as the cord 180 rotates. In other words, the contact portion 175b moves while contacting the extended surfaces 174La and 174Ra of the first guide members 174L and 174R. The connection part 175c connects the attachment part 175a and the contact part 175b. The outer position 175a2, the contact portion 175b, and the connecting portion 175c are integrally formed.

  The second guide member 175 is arranged corresponding to each of the supply cups 171 and 172. That is, the number of second guide members 175 is equal to the number of supply cups 171 and 172. The mounting portion 175a of the second guide member 175 is arranged on the inner peripheral side (cord 180 side) of the corresponding supply cup 171 (or 172). The contact portion 175b of the second guide member 175 is arranged on the outer peripheral side of the corresponding supply cup 171 (or 172) (the side opposite to the cord 180 side). The connection portion 175c is arranged from the inner peripheral side to the outer peripheral side of the corresponding supply cup 171 (or 172). The shape of the second guide member 175 can be changed, and the second guide member 175 may be formed integrally with the supply cups 171 and 172. For example, a collar-shaped extending portion may be formed on the outer periphery of the supply cups 171, 172, and the extending portion may be the second guide member 175.

  The contact portion 175b of the second guide member 175 and the extended surfaces 174La and 174Ra of the first guide member 174L and the first guide member 174R contact each other, so that the rope 180 is prevented from swinging or slacking in the machine width direction. Can be prevented. Further, as shown in FIG. 42, the contact portion 175b of the second guide member 175 and the extended surfaces 174La and 174Ra of the first guide member 174L and the first guide member 174R contact each other (surface contact). To). Therefore, it is possible to suppress the swinging and slacking of the rope 180 in the machine width direction and the swinging and loosening of the rope 180 in the vertical direction.

When the cord 180 swings or sags in the vertical direction, the contact portion 175b inclines (becomes the high position or the low position) with respect to the attachment portion 175a, but the contact portion 175b and the extending surfaces 174La and 174Ra are Since they are in surface contact with each other, the contact portion 175b cannot be inclined. Therefore, it is possible to suppress the vertical swing or slack of the rope 180.
The guide member 173 guides the movement of the cord 180 at least at the open position of the lids 183a and 183b. Specifically, the first guide member 174L guides the movement of the cord 180 at least at the open position (first open position D1) of the lid 183a. The first guide member 174R guides the movement of the cord 180 at least in the (second open position D2) of the lid 183b. In other words, the guide member 173 guides the cord 180 along the movement direction when the cord 180 moves so as to pass through the open positions D1 and D2 of the lids 183a and 183b.

Thereby, at least at the open position of the lids 183a and 183b, it is possible to suppress the swaying or loosening of the cord 180. Therefore, it is possible to prevent the seedlings from dropping due to the lids 183a and 183b opening at unintended positions and timings.
The guide member 173 may guide the rope 180 at least when the rope 180 passes through the open positions D1 and D2, but may guide the rope 180 before and after passing through the open positions D1 and D2. preferable.

  As shown in FIGS. 2 and 3, the working machine 1 has a plurality of chairs on which a worker who works on the second ground working machine (the transplanter 3) of the ground working apparatus 1B sits. 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. 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 3 having the first seedling feeding device 38A and the second seedling feeding 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 feeding 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 worker sits facing the rear side (seedling supply device 38 side). The first rear chair 187C and the second rear chair 187D are chairs on which the worker sits facing the front (the seedling supply device 38 side).
By providing a chair on which a worker sits before and after the seedling supply device 38, the width of the working machine 1 (ground working device 1B) in the machine width direction K2 can be reduced (narrowed), and movement between fields is easy. As a result, it becomes easy (advantageous) to transport by truck. Further, since the first opening position D1 (seedling dropping position) and the second opening position D2 (seedling dropping position) are located in the front-rear midway portion of the transfer route R1 of the supply cups 171, 172, that is, the position where the seedlings are dropped. Since there is no seedling in front of the eyes, it becomes easy to supply seedlings to the supply cups 171 and 172. Further, since the work of the front worker and the work of the rear worker are unified, the replacement of the workers becomes easy.

As shown in FIGS. 43 to 45, the first front chair 187A and the second front chair 187B are supported by the chair support 150 via the position adjusting mechanism 230.
The position adjustment mechanism 230 is a mechanism that can adjust the positions of the chairs (first front chair 187A and second front chair 187B) with respect to the transplanter (second ground work machine) 3. The position adjusting mechanism 230 includes a first position adjusting mechanism 231, a second position adjusting mechanism 232, and a third position adjusting mechanism 233. The first position adjustment mechanism 231 is a mechanism that allows the positions of the chairs (the first front chair 187A and the second front chair 187B) to be adjusted in the machine width direction K2. The second position adjusting mechanism 232 is a mechanism that allows the positions of the chairs (first front chair 187A and second front chair 187B) to be adjusted in the front-rear direction. The third position adjusting mechanism 233 is a mechanism that allows the positions of the chairs (the first front chair 187A and the second front chair 187B) to be adjusted in the vertical direction.

  The position adjustment mechanism 230 includes a position adjustment mechanism 230A capable of adjusting the position of the first front chair 187A and a position adjustment mechanism 230B capable of adjusting the position of the second front chair 187B. Since the configuration of the position adjusting mechanism 230A and the configuration of the position adjusting mechanism 230B are the same, the configuration of the position adjusting mechanism 230A will be described, and the description of the configuration of the position adjusting mechanism 230B will be omitted.

  As shown in FIG. 43 and FIG. 46, the first position adjusting mechanism 231 of the position adjusting mechanism 230A includes a fixing plate 231a fixed to the second supporting body 152 of the chair supporting body 150, and a fixture for the fixing plate 231a. The movable plate 231b is attached by (bolts 231c and nuts 231d). As shown in FIG. 12, the fixing plate 231 a is fixed to the left portion of the lateral support member 158 of the second support body 152. As shown in FIGS. 46 and 52, the fixed plate 231a is formed with a plurality of through holes 231e arranged in the machine width direction K2. The movable plate 231b also has a plurality of through holes 231f arranged in the machine width direction.

  The plurality of through holes 231e formed in the fixed plate 231a and the plurality of through holes 231f formed in the movable plate 231b are formed side by side at the same intervals (pitch). By stacking the through hole 231e formed in the fixed plate 231a and the through hole 231f formed in the movable plate 231b, inserting the bolt 231c, and screwing the nut 231d, the movable plate 231b is attached to the fixed plate 231a. Positioned and mounted. Further, as indicated by a phantom line in FIG. 43, the movable plate 231b is displaced in the machine width direction K2 with respect to the fixed plate 231a, and the through holes to be overlapped are changed and attached, whereby the position of the movable plate 231b with respect to the fixed plate 231a. Can be adjusted in the machine width direction K2.

  As shown in FIGS. 45 and 46, the third position adjusting mechanism 233 of the position adjusting mechanism 230A is attached to the cylindrical body 233a fixed to the movable plate 231b and an attaching tool (pin) 233c with respect to the cylindrical body 233a. And a column body 233b. The tubular body 233a has a rectangular tubular shape and extends in the vertical direction. A through hole 233d is formed in the cylindrical body 233a. The column body 233b has a rectangular tubular shape that is thinner than the tubular body 233a, is inserted into the tubular body 233a, and extends in the vertical direction. A plurality of through holes 233e arranged in the vertical direction are formed in the column body 233b. By inserting the pin 233c by overlapping the through hole 233d formed in the cylindrical body 233a and the through hole 233e formed in the cylindrical body 233b, the cylindrical body 233b is positioned and attached to the cylindrical body 233a. Further, as shown by phantom lines in FIG. 45, the column body 233b is vertically displaced with respect to the cylinder body 233a, and the through holes to be overlapped are changed and attached, whereby the position of the column body 233b with respect to the cylinder body 233a is vertically changed. Can be adjusted in direction.

  As shown in FIGS. 44 and 46, the second position adjusting mechanism 232 of the position adjusting mechanism 230A includes a support base 232a fixed to the upper end of the column body 233b, and an attachment tool (bolt) 232c for the support base 232a. And a bottom receiving member 232b that is attached by and receives the bottom of the chair 187A. The support base 232a has a front portion 232d, an intermediate portion 232e, and a rear portion 232f. The intermediate portion 232e extends in the front-rear direction, and the front portion is fixed to the upper end portion of the column body 233b. The front portion 232d is fixed to the front end of the intermediate portion 232e. A spring 234 that supports a rear portion of the bottom surface of the chair 187A is attached to the front portion 232d. The rear portion 232f is fixed to the rear end of the intermediate portion 232e. As shown in FIG. 54, the rear portion 232f has a through hole 232i into which the shaft body 232h extending in the machine width direction K2 is inserted.

  As shown in FIGS. 46 and 54, the bottom receiving member 232b is attached to the upper portion of the rear portion 232f of the support base 232a. The bottom receiving member 232b has an upper portion 232b1 and a side portion 232b2. The upper portion 232b1 is a plate-shaped portion that is arranged horizontally, and the bottom front portion of the first front chair 187A is attached to the upper surface. The side portion 232b2 extends downward from one end side and the other end side of the upper portion 232b1 in the machine width direction. A plurality of through holes 232g are formed in the side portion 232b2 at intervals in the front-rear direction. When the bottom receiving member 232b is placed on the upper portion of the support base 232a, one of the through holes 232g of the side portion 232b2 overlaps with the through hole formed in the rear portion 232f of the support base 232a. The bottom receiving member 232b is positioned with respect to the support base 232a by inserting the shaft body 232h into the through hole 232g of the overlapped side portion 232b2 and the through hole of the rear portion 232f and preventing the shaft body 232h from coming off with a stopper such as a β pin. Is installed. Further, as shown by the phantom line in FIG. 44, the bottom receiving member 232b is displaced in the front-rear direction with respect to the support base 232a, and the through holes to be overlapped are changed and attached, whereby the position of the bottom receiving member 232b with respect to the support base 232a. Can be adjusted back and forth.

  By adjusting the position of the bottom receiving member 232b in the front-back direction by the second position adjusting mechanism 232, the position of the first front chair 187A attached to the bottom receiving member 232b can be adjusted in the front-back direction. Further, the position of the first front chair 187A can be adjusted in the vertical direction by adjusting the position of the column body 233b in the vertical direction with respect to the cylindrical body 233a by the third position adjusting mechanism 233. In addition, the position of the first front chair 187A can be adjusted in the machine width direction by adjusting the position of the movable plate 231b with respect to the fixed plate 231a in the machine width direction by the first position adjustment mechanism 231.

Therefore, according to the position adjusting mechanism 230A, the position of the first front chair 187A can be adjusted in the front-rear direction, the up-down direction, and the machine width direction. Further, according to the position adjusting mechanism 230B, the position of the second front chair 187B can be adjusted in the front-rear direction, the up-down direction, and the machine width direction by the same operation as the position adjusting mechanism 230A.
The configurations of the first position adjusting mechanism 231, the second position adjusting mechanism 232, and the third position adjusting mechanism 233 are not limited to the above-described configurations. For example, in the first position adjusting mechanism 231, the horizontal support member 158 of the second support body 152 is a square pipe, and a fixture having U bolts is fixed to the horizontal support member 158 instead of the fixing plate 231a. The movable plate 231b may be attached. According to this configuration, the movable plate 231b can be moved along the lateral support member 158 in the machine width direction by loosening the fixture. Therefore, the position of the movable plate 231b with respect to the fixed plate 231a can be adjusted in the machine width direction.

As shown in FIG. 2, between the first front chair 187A and the transplanter 3, a footrest plate 235A on which a worker sitting on the first front chair 187A places his / her foot is provided. Between the second front chair 187B and the transplanter 3, a footrest plate 235B on which the worker sitting on the second front chair 187B rests his foot is provided. The footrest plates 235A and 235B are rectangular plates in plan view.
The footrest plate 235A is arranged behind and below the first front chair 187A. The footrest plate 235B is arranged behind and below the second front chair 187B. The footrest plates 235A and 235B are arranged behind and above the elastic pressure device 20 of the rotary cultivator 2. In addition, the footrest plate 235A is arranged above and in front of the connecting bracket 61 (first attachment 61A) of the first machine frame 37A. The footrest plate 235B is arranged above and in front of the connecting bracket 61 (second attachment 61B) of the second machine frame 37B.

As shown in FIGS. 47 and 48, a large number of ribbed holes 236 and a plurality of (four) through holes 237 through which bolts (butterfly bolts) B6 are inserted are formed in the footrest plate 235A. The same applies to the footrest plate 235B.
The footrest plates 235A and 235B are detachably attached to the chair support 150. Specifically, the footrest plates 235A and 235B are detachably attached to the attachment portions 260A and 260B (see FIG. 12) provided on the chair support 150. The attachment portion 260A is a portion to which the footrest plate 235A is attached. The attachment portion 260B is a portion to which the footrest plate 235B is attached. The mounting portions 260A and 260B are provided on the first support 151 of the chair support 150.

  As shown in FIGS. 12 and 48, the mounting portion 260A includes a front support member 151a and a rear support member 151b of the first support 151, and a connection support member 151c arranged on the left side of the first support 151. Has been done. A plurality of (four) first stays 261 to which nuts are fixed are attached to the front support member 151a and the rear support member 151b between adjacent connection support members 151c in the machine width direction K2. The footrest plate 235A is placed behind and below the first front chair 187A, on the front support member 151 and the rear support member 151b, and on the connection support member 151c disposed on the left side of the first support body 151. , And is fixed to the first stay 261 by bolts (butterfly bolts) B6.

  As shown in FIG. 12, the mounting portion 260B includes a front support member 151a and a rear support member 151b of the first support body 151, and a connection support member 151c arranged on the right side of the first support body 151. . A second stay 262 having a nut fixed thereto is attached to the front support member 151a and the rear support member 151b between adjacent connection support members 151c in the machine width direction K2. A plurality of (four) second stays 262 are provided, like the first stays 261. The footrest plate 235B is placed on the front support member 151a, the rear support member 151b, and the connection support member 151c arranged on the right side of the first support body 151, and is attached to the second stay 262 by a bolt (butterfly bolt). Fixed to.

  The footrest plate 235A can be removed from the mounting portion 260A provided on the chair support 150 by removing the bolt (butterfly bolt) B6 from the first stay 261. Similarly, the footrest plate 235B can be removed from the mounting portion 260B provided on the chair support 150 by removing the bolt (butterfly bolt) from the second stay 262. Thereby, the spring of the elastic pressure device 20 of the rotary cultivator 2 can be easily adjusted. Further, the distance between the first transplant unit 36A and the second transplant unit 36B is adjusted by moving the connecting bracket 61 of the first machine frame 37A and the connecting bracket 61 of the second machine frame 37B along the tool bar 43. (Adjusting the space) can be easily performed. Further, the position adjustment of the irrigation tube described later can be easily performed.

  The footrest plates 235A and 235B may be attached to the chair support 150 so as to be openable and closable. For example, the front portions of the footrest plates 235A and 235B are attached to the front support member 151a of the first support body 151 via hinges (hinge), or the rear portions of the footrest plates 235A and 235B are attached via hinges (hinge). It can be attached to the rear support 151b of the first support 151. In the case of this configuration, the footrest plates 235A and 235B are opened with respect to the chair support 150 to adjust the spring of the elastic device 20 and adjust the distance between the first implantation unit 36A and the second implantation unit 36B. (Structure adjustment) and position adjustment of the irrigation tube can be easily performed.

  As shown in FIG. 20 and the like, 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 movably connected to an attachment body 196 attached to the rotary cultivator 2.

The seat frame 197 has a frame main body 199, a frame coupling mechanism 200, and a plurality of wheels (first wheel 206A to third wheel 206C).
The first rear chair 187C and the second rear chair 187D are attached to the frame body 199. The frame main body 199 includes a first frame portion 201 arranged on the left side (one side) of the transplanter 3, a second frame portion 202 arranged on the right side (other side) of the transplanter 3, It has the 1st frame part 201 and the 3rd frame part 203 which connects the rear parts of the 2nd frame part 202. The first frame portion 201 and the second frame portion 202 are formed of a square pipe material. The first frame portion 201 is arranged behind the first side member 196A so as to extend in the front-rear direction K1. The second frame portion 202 is arranged behind the second side member 196B so as to extend in the front-rear direction K1.

  The third frame portion 203 is arranged behind the transplanter 3 so as to extend in the machine width direction K2. The third frame portion 203 is composed of a plurality of square pipe materials (first member 203A, second member 203B, third member 203C). The left end portion of the first member 203A is connected to the rear portion of the first frame portion 201. The right end portion of the second member 203B is connected to the rear portion of the second frame portion 202. The third member 203C connects the first member 203A and the second member 203B. The positions of the first member 203A and the second member 203B can be adjusted in the machine width direction K2 along the third member 203C.

  As shown in FIGS. 20 and 49, the first rear chair 187C is attached to the left part of the third member 203C of the third frame portion 203 via the seat support member 227A. The first rear chair 187C is attached to the seat support member 227A so as to be positionally adjustable in the front-rear direction and the vertical direction. As shown in FIG. 20, a second rear chair 187D is attached to the right part of the third member 203C via a seat support member 227B. The structure of the seat supporting member 227B is similar to that of the seat supporting member 227A. The second rear chair 187D is attached to the seat support member 227B so as to be positionally adjustable in the front-rear direction and the up-down direction. Further, the seat supporting members 227A and 227B are attached to the third member 203C so as to be positionally adjustable in the machine width direction K2. That is, the seat support members 227A and 227B have position adjustment mechanisms that can adjust the positions of the first rear chair 187C and the second rear chair 187D in the front-rear direction, the machine width direction, and the vertical direction, respectively. The configuration of this position adjusting mechanism is the position adjusting mechanism 230 (first position adjusting mechanism 231, second position adjusting mechanism 232, third position adjusting mechanism 233) for adjusting the positions of the first front chair 187A and the second front chair 187B. Is the same as.

  As shown in FIG. 20 and FIG. 49, a footrest plate 235C on which a worker seated on the first rear chair 187C puts his / her foot is disposed below the front of the first rear chair 187C. A footrest plate 235D on which a worker seated on the second rear chair 187D rests his / her foot is disposed below the front side of the second rear chair 187D. The footrest plates 235C and 235D are supported on the frame body 199 of the seat frame 197. Specifically, the footrest plates 235C and 235D are supported on the third member 203C of the third frame portion 203.

  The frame connecting mechanism 200 is a mechanism for connecting the frame main body 199 to the mounting body 196 so as to be vertically movable. The frame connection mechanism 200 has a first mechanism 200A and a second mechanism 200B. The first mechanism 200A connects the first frame portion 201 to the first side member 196A. The second mechanism 200B connects the second frame portion 202 to the second side member 196B. The first mechanism 200A and the second mechanism 200B are configured by a parallel link mechanism.

The plurality of wheels (first wheel 206A to third wheel 206C) are, for example, tires, and ground to support the frame main body 199. Therefore, the seat frame 197 moves up and down with respect to the rotary cultivator 2 and the transplanter 3 following the unevenness of the field.
The first wheel 206A is provided on one side (left side) of the frame body 199 in the machine width direction K2, and the second wheel 206B is provided on the other side (right side) of the frame body 199 in the machine width direction K2. There is. The third wheel 206C is provided at a midway portion (center portion) of the frame body 199 in the machine width direction K2. In other words, the third wheel 206C is arranged between the first rear chair 187C and the second rear chair 187D.

As shown in FIGS. 20 and 49, a link member 215 is provided so as to extend across the working machine connection mechanism 41 and the seat frame 197. The link member 215 includes a first link member 215A and a second link member 215B. The link member 215 is provided across the toolbar 43 and the link 209A on the upper side of the frame coupling mechanism 200.
The number of link members 215 may be one. In other words, it suffices to have at least one link member 215. Further, the link member 215 may be provided over the seat frame 197 and a member that moves up and down together with the transplanter 3 or the transplanter 3.

As shown in FIG. 20, the first link member 215A is arranged inside the width of the first side member 196A and the first mechanism 200A. The second link member 215B is arranged inside the machine width of the second side member 196B and the second mechanism 200B.
As shown in FIG. 20 and FIG. 49, the front end portion (upper end portion) of the first link member 215A is attached to the bracket member 228A fixed to the rear surface of the tool bar 43 via the pivot 229A, around the axis in the machine width direction K2. It is rotatably supported. An upper portion (front portion) of the second link member 215B is pivotally supported by a bracket member 228B fixed to the rear surface of the tool bar 43 via a pivot 229B so as to be rotatable about an axis in the machine width direction K2.

  The engagement pin 221 is provided on the link 209A of the first mechanism 200A and the link 209B of the second mechanism 200B so as to project inward in the machine width. The left engagement pin 221 is inserted through the elongated hole 220 of the first link member 215A, and the right engagement pin 221 is inserted through the elongated hole 220 of the second link member 215B. The engaging pin 221 may be provided on the frame body 199. The front end of the link member 215 may be pivotally supported by the machine frame 37.

  When the seat frame 197 moves up and down during the work, the engaging pin 221 moves in the elongated hole 220, so that the seat frame 197 can move up and down. Further, when the working tool 1 is loaded on a truck or the like or is unloaded from the truck or the like, when the tool bar 43 is raised and the transplanter 3 is lifted, the link member 215 moves upward and the engagement pin 221 moves to the long hole 220. The seat frame 197 can be lifted (pulled up) by the link member 215 moving upward with the lower end abutting and the engaging pin 221 abutting the lower end of the elongated hole 220.

As described above, the link member 215 allows the seat frame 197 to move up and down at the time of working, and when the lifting drive device 42 lifts the transplanter 3, the link member 215 moves upward as the second ground working machine rises. The seat frame 197 can be lifted up.
As shown in FIG. 2 and the like, a seedling supply table 188A is provided behind the first front chair 187A. A seedling supply table 188B is provided behind the second front chair 187B. A seedling supply table 188C is provided in front of the first rear chair 187C. A seedling supply table 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 who is seated on the first front chair 187A. The seedling supply table 188B is located on the front side of the operator who is seated on the second front chair 187B. The seedling supply table 188C is located on the front side of the worker who is seated on the first rear chair 187C. The seedling supply table 188D is located on the front side of the worker who is seated on the second rear chair 187D.

A seedling tray having a large number of seedlings can be placed on the seedling supply bases 188A to 188D. The operator 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 bases 188A to 188D.
First, the configurations of the seedling supply tables 188A and 188B will be described.
As shown in FIG. 12, the seedling supply bases 188A and 188B are attached to a position adjusting mechanism 230 that supports the front chair in a positionally adjustable manner. Specifically, the seedling supply table 188A is attached to the position adjusting mechanism 230 that supports the first front chair 187A. The seedling supply table 188B is attached to the position adjusting mechanism 230 that supports the second front chair 187B. The seedling supply table 188A and the seedling supply table 188B are symmetrically arranged with the center line of the working machine 1 in the machine width direction K2 interposed therebetween. Except for this configuration (symmetrical configuration), the seedling supply table 188A and the seedling supply table 188B have the same configuration, so the configuration of the seedling supply table 188A will be described, and the description of the configuration of the seedling supply table 188B will be omitted. To do.

  As shown in FIGS. 12 and 43 to 48, the seedling supply table 188A is attached to the support table 232a of the second position adjustment mechanism 232 via the support mechanism 270. The support mechanism 270 includes a receiving cylinder 271, a support arm 272, and a rotation support mechanism 273. The receiving cylinder 271 has a cylindrical shape, extends in the machine width direction, and is fixed to an intermediate portion 232e of the support base 232a. The support arm 272 is formed by bending a cylindrical pipe at two places. As shown in FIG. 47 and the like, the support arm 272 has an arm base end portion 272a, an arm middle portion 272b, and an arm tip end portion 272c. As shown in FIGS. 43 and 46, the arm base end portion 272a extends in the machine width direction K2, and one end side is inserted into the receiving cylinder 271 from the inside of the machine width (right side). As shown in FIGS. 45 to 47, the arm intermediate portion 272b bends from the other end side of the arm base end portion 272a and extends rearward, and moves upward as it extends rearward. The arm intermediate portion 272b is located on the inner side in the machine width of the first front chair 187A. As shown in FIGS. 45 and 47, the arm tip portion 272c is bent from the rear end of the arm intermediate portion 272b and extends upward.

  As shown in FIG. 50, the rotation support mechanism 273 has a base portion 274 and a support shaft 275. The base portion 274 has an outer cylindrical body 274a, a substrate 274b, and a regulation plate 274c. The outer cylindrical body 274a is fitted onto the upper portion of the arm tip portion 272c. The substrate 274b is fixed to the upper part of the outer cylindrical body 274a. The board 274b has two standing portions 274d that respectively stand from the front portion and the rear portion, and a first locking portion 274e to which one end portion of the spring 276 is locked. The regulation plate 274c is fixed to the substrate 274b. The regulation plate 274c has an outer protruding portion 274c1 protruding upward on the machine width outer side (left side) and an inner protruding portion 274c2 protruding upward on the machine width inner side (right side). . The outer protrusion 274c1 protrudes above the substrate 274b on the left side of the substrate 274b. The inward protruding portion 274c2 protrudes above the substrate 274b on the right side of the substrate 274b. As shown in FIG. 51, the height of the outer protrusion 274c1 is higher than the height of the inner protrusion 274c2. The support shaft 275 extends over the two upright portions 274d of the substrate 274b. The support shaft 275 extends in the front-rear direction between the inner protrusion 274c2 and the outer protrusion 274c1.

  As shown in FIGS. 50 to 53, the seedling supply table 188A is rotatably supported by the rotation support mechanism 273. The seedling supply table 188A has a placing portion 191 on which a seedling tray can be placed, and a support structure 192 that supports the placing portion 191. The support structure 192 includes bending members 193F and 193B and a bar member 194. The bending members 193F and 193B are bent in an obtuse V shape at an intermediate portion between one end and the other end. Hereinafter, the portion between one end of the bending members 193F and 193B and the middle portion (bending portion) is referred to as "one end side portion", and the other end of the bending members 193F and 193B and the middle portion (bending portion). Is referred to as "the other end side part".

  One end of the bending member 193F is attached to the front part of the support shaft 275. One end of the bending member 193B is attached to the front part of the support shaft 275. The rod 194 is provided at one end side portion of the bending members 193F and 193B. The bar 194 extends in the front-rear direction across the bending members 193F and 193B. A second locking portion 194a, on which the other end of the spring 276 is locked, is provided at one end of the rod 194.

  The mounting portion 191 is provided on the other end side portion of the bending members 193F and 193B. The mounting portion 191 has a plurality of (two) receiving members 191a extending in the front-rear direction across the bending members 193F and 193B, and a square annular receiving frame 191b attached to the receiving members 191a. There is. The receiving material 191a and the receiving frame 191b constitute a substantially rectangular seedling placing surface that supports the bottom surface of the seedling tray.

As shown in FIGS. 50 to 52, the bending members 193F and 193B can rotate around the support shaft 275. The rotation range of the bending members 193F and 193B is regulated by the regulation plate 274c.
When the bending members 193F and 193B are rotated outward in the machine width direction, the rod member 194 comes into contact with the outward protruding portion 274c1 of the regulation plate 274c, and further rotation is impossible. In this state, the seedling supply table 188A is in the first posture in which the seedling placing surface faces the horizontal direction. When the bending members 193F and 193B are rotated inward in the machine width direction, the bar member 194 comes into contact with the inward protruding portion 274c2 of the regulation plate 274c, and further rotation is impossible. In this state, the seedling supply table 188A is in the second posture in which the seedling placing surface faces the vertical direction. The second posture includes a case where the seedling placing surface faces a vertical direction (vertical direction) and a case where the seedling placing surface faces a direction slightly inclined with respect to the vertical direction.

  The spring 276 pulls the rod 194 toward the inward protrusion 274c2 when the seedling supply table 188A is in the first posture. As a result, unless the operator applies a particular force, the state in which the bar 194 is in contact with the inward protruding portion 274c2 is maintained, and thus the first posture is maintained. The spring 276 pulls the bar 194 toward the outward protruding portion 274c1 when the seedling supply table 188A is in the second posture. As a result, unless the operator applies a particular force, the state in which the bar 194 is in contact with the outer protruding portion 274c1 is maintained, and thus the second posture is maintained.

  The seedling tray is placed on the seedling placement surface when the seedling supply table 188A is in the first posture. The placement part 191 is located behind the first front chair 187A and in front of the first seedling supply device 38A when the seedling supply table 188A is in the first posture. Therefore, the operator who sits on the first front chair 187A and faces the first seedling supply device 38A takes the seedlings on the seedling tray placed on the seedling placing surface of the placing unit 191 in front of him. Then, the seedlings can be supplied to the supply cups 171 and 172 of the first seedling supply device 38A.

  When the seedling tray is not placed on the seedling placing surface of the placing part 191, (before or after the start of the seedling feeding work), the seedling feeding table 188A is set to the second posture in which the seedling placing surface faces the vertical direction. When the seedling supply table 188A is in the second posture, the placing portion 191 is located on the inner side in the machine width of the first front chair 187A. Further, when the seedling supply table 188A is in the second posture, the placing portion 191 is located on the inner side of the second front chair 187B in the machine width direction. Accordingly, the worker can get on and off the first front chair 187A and the second front chair 187B without being disturbed by the seedling supply bases 188A and 188B.

Further, as shown by an arrow A1 in FIG. 46, the arm base end portion 272a of the support arm 272 is rotatable around the axis of the receiving cylinder 271 (around the axis in the machine width direction). As shown in FIG. 53, by rotating the arm base end portion 272a around the axis of the receiving cylinder 271, the mounting portion 191 can be moved from the front of the first front chair 187A to the side.
Further, as described above, since the seedling supply base 188A and the seedling supply base 188B are symmetrically arranged with the center line in the machine width direction of the working machine 1 interposed therebetween, the seedling supply base 188A and the seedling supply base 188B are Can be used interchangeably. Specifically, as shown in FIG. 54, the seedling supply table 188A is removed, and one end side of the arm base end portion 272a of the seedling supply table 188B is mounted on the receiving tube 271 of the support mechanism 270 that supports the seedling supply table 188A. It is also possible to insert it from the width outer side (left side) and attach it to the support base 232a.

Similarly, the seedling supply base 188B is removed, and one end side of the arm base end portion 272a of the seedling supply base 188A is inserted into the receiving cylinder 271 of the support mechanism 270 supporting the seedling supply base 188B from the machine width outside (right side). Can be attached to the support base 232a.
When the seedling supply table 188A and the seedling supply table 188B are replaced with each other, the placing part 191 has the first front chair 187A and the second front chair 187B when the seedling supply tables 188A and 188B are in the second posture. Located outside the width.

Next, the configurations of the seedling supply tables 188C and 188D will be described.
The seedling supply table 188C is attached to the seat support member 227A that supports the first rear chair 187C. The seedling supply table 188D is attached to the seat support member 227B that supports the second rear chair 187D. The seedling supply table 188C and the seedling supply table 188D are configured symmetrically with the center line of the working machine 1 in the machine width direction sandwiched therebetween. Except for this configuration (symmetrical configuration), the seedling supply table 188C and the seedling supply table 188C have the same configuration.

  Moreover, when the first rear chair 187C and the first front chair 187A are arranged at the same position in the machine width direction, the seedling supply base 188C and the seedling supply base 188A are the center of the first seedling supply device 38A in the front-rear direction. The lines are symmetrically arranged. Except for this configuration (symmetrical configuration) and the attachment position (attached to the seat support member 227A instead of the chair support 150), the seedling supply table 188A and the seedling supply table 188C have the same configuration.

  Further, when the second rear chair 187D and the second front chair 187B are arranged at the same position in the machine width direction, the seedling supply table 188D and the seedling supply table 188B are the centers of the second seedling supply device 38B in the front-rear direction. The lines are symmetrically arranged. Except for this configuration (symmetrical configuration) and the attachment position (point attached to the seat support member 227B instead of the chair support 150), the seedling supply table 188B and the seedling supply table 188D have the same configuration.

Since the seedling supply base 188C and the seedling supply base 188D are symmetrically arranged with the center line of the working machine 1 in the machine width direction, the seedling supply base 188C and the seedling supply base 188D can be used interchangeably. it can.
As shown in FIGS. 2 and 20, a seedling placing table 190 on which a seedling tray can be placed is provided above the first seedling supplying device 38A and the second seedling supplying device 38B. A plurality of seedling trays can be placed on the seedling placing table 190.

As shown in FIG. 21, the seedling placing table 190 has a rectangular frame 190a and a bottom plate 190b provided below the frame 190a. The bottom plate 190b may be formed of a flat plate, a net body, or punching metal. A plurality of seedling trays can be placed on the bottom plate 190b.
The seedling platform 190 is formed to be longer in the machine width direction K2 than in the front-rear direction K1 and is arranged so as to extend over the first seedling supply device 38A and the second seedling supply device 38B. However, the seedling placing table 190 does not cover the upper portions of the supply cups 171 and 172 located in front of the worker who is seated in each chair.

As shown in FIG. 21, the seedling placing table 190 is attached on a table receiver 189 provided in the connecting frame 130 that connects the first transplanting unit 36A and the second transplanting unit 36B. The pedestal support 189 is provided on the fifth connection frame member 135. The stand 189 is arranged above the first seedling supply device 38A and the second seedling supply device 38B.
The operator can supply the seedlings from the seedling tray on the seedling placing table 190 to the supply cups 171 and 172. Since the seedling placing table 190 is arranged so as to straddle over the first seedling feeding device 38A and the second seedling feeding device 38B, the first front chair 187A, the second front chair 187B, and the first rear chair. An operator seated in each of the chairs 187C and the second rear chair 187D can take the seedlings from the seedling tray on the seedling placing table 190. That is, the seedling placing table 190 is arranged at a position where an operator sitting on each chair can take the seedlings from the seedling tray on the seedling placing table 190.

  When there are no more seedlings on the seedling tray on the seedling supply table 188, the operator can supply the seedlings on the seedling tray on the seedling mounting table 190 to the supply cups 171 and 172. That is, the seedling placing table 190 is a table on which a spare seedling tray is placed. Further, when the seedling tray on the seedling supply table 188 is exhausted, the empty seedling tray may be replaced with the seedling tray on the seedling placing table 190. Further, the seedling placing base 190 may be a common seedling supplying base for each worker without providing the seedling supplying base 188 located in front of each worker.

  As shown in FIG. 2, FIG. 13, and FIG. 55, the working machine 1 is equipped with auxiliary seedling stands 280L and 280R for mounting a container CN that accommodates a seedling tray. The spare seedling stands 280L and 280R are arranged above the rotary cultivator 2. The spare seedling stand 280L is arranged above the left part of the rotary cultivator 2 and in front of the first front chair 187A. The preliminary seedling stand 280R is arranged above the right part of the rotary cultivator 2 and in front of the second front chair 187B.

The spare seedling stand 280L and the spare seedling stand 280R have the same configuration except that the arrangement is different. Therefore, the configuration of the spare seedling stand 280L will be described below, and the description of the configuration of the spare seedling stand 280R will be omitted.
As shown in FIG. 55, the preliminary seedling stand 280L includes a first support column 281, a second support column 282, a third support column 283, a fourth support column 284, a first bracket 285, a second bracket 286, a mounting frame body 287, and a mounting plate. Has 288. The first support column 281, the second support column 282, the third support column 283, and the fourth support column 284 extend in the vertical direction. As shown in FIG. 13, the first support column 281 and the second support column 282 are fixed to the lower plate 19Cd of the support cover 19C4. As shown in FIG. 55, the third support column 283 and the fourth support column 284 are fixed to the extension member 289 attached to the front extension portion 34L of the mounting frame 14. The first support column 281 is arranged in front of the second support column 282. The third support column 283 is arranged in front of the fourth support column 284. The first support column 281 is arranged to the left of the third support column 283. The second support column 282 is arranged to the left of the fourth support column 284.

  The first bracket 285 connects the upper part of the first support column 281 and the upper part of the second support column 282. The second bracket 286 connects the upper part of the third support column 283 and the upper part of the fourth support column 284. The mounting frame body 287 is a frame body having a rectangular outer shape in plan view. The mounting frame body 287 is configured by combining angle members having an L-shaped cross section. The lower portion of the mounting frame body 287 is supported by the first bracket 285 and the second bracket 286. As shown in FIGS. 13 and 55, the placing plate 288 is placed on the placing frame 287. The mounting plate 288 is omitted in FIG.

The mounting plate 288 is a rectangular plate whose length in the machine width direction is longer than its length in the front-rear direction. A space SPA is formed between the mounting plate 288 and the rotary cultivator 2 (between the upper cover 19A). In other words, the mounting plate 288 is arranged above the rotary cultivator 2 in a floating manner.
As shown in FIGS. 1 and 3, a container CN for accommodating a seedling tray is placed on the placing plates 288 of the preliminary seedling stands 280L and 280R. The container CN is a rectangular parallelepiped box whose length in the up-down direction is longer than the length in the front-rear direction and the length in the machine width direction. In the container CN, a plurality of seedling trays can be arranged vertically and accommodated. The front side of the container CN is open, and a worker can take out the seedling tray stored in the container CN from the front side. Further, the empty seedling tray on the seedling supply table 188 or the seedling placing table 190 can be replaced with the seedling tray in the container CN. The replacement of the seedling tray is performed by an operator who sits on the first front chair 187A and the second front chair 187B.

  As shown in FIGS. 2 and 3, the working machine 1 includes a tube roll 290 around which a watering tube is wound. The irrigation tube is a tube that supplies water to the planted seedlings. The tube roll 290 is arranged between the traveling body 1A and the rotary cultivator 2. That is, the tube roll 290 is arranged behind the traveling body 1A and in front of the rotary cultivator 2. Further, the tube roll 290 is arranged in front of the irrigation pump 50. Further, the tube roll 290 is arranged between the transmission case 12 and the left side frame 15L in the machine width direction. Although not shown, the tube roll 290 can also be arranged between the transmission case 12 and the right side frame 15R in the machine width direction.

  The tube roll 290 is supported by a roll support 291 so as to be rotatable about an axis in the machine width direction. As shown in FIG. 55, the roll support body 291 includes a shaft body 292, bearings 293L and 293R, and support rods 294L and 294R. As shown in FIG. 2, the shaft body 292 is arranged in front of the rotary cultivator 2 and extends in the machine width direction K2. As shown in FIG. 55, the shaft 292 is arranged at a position lower than the mounting plate 288 of the preliminary seedling stand 280L of the rotary cultivator 2.

  The bearing 293L rotatably supports one end of the shaft body 292. The bearing 293R rotatably supports the other end of the shaft body 292. The support rod 294L extends in the front-rear direction and is connected to the first support column 281 and the second support column 282. The support rod 294R extends in the front-rear direction and is connected to the third support column 283 and the fourth support column 284. The bearing 293L is supported on the rear portion of the support rod 294L. The bearing 293R is supported on the rear portion of the support rod 294R.

  The tube roll 290 is attached to the shaft body 292. The tube roll 290 rotates around the axis in the machine width direction as the shaft 292 rotates. By rotating the tube roll 290, the watering tube can be paid out. The irrigation tube can be extended rearward through the space SPA between the mounting plate 288 of the preliminary seedling stand 280L and the rotary cultivator 2. Further, the irrigation tube can be passed under the footrest plates 235A and 235B.

  One end (the end on the unwinding side) of the irrigation tube is fixed to the field before the working machine 1 travels. The working 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 watering tube is unwound from the tube roll 290 and laid on the ridge formed by the working machine 1. It is possible to irrigate the seedlings planted in the ridges from the laid irrigation tube.

  As shown in FIGS. 1, 56, and 57, the working machine 1 may include, as the ground working device 1B, a multi-film laying device 300 that lays a multi-film on a ridge formed in a field. The multi-film laying apparatus 300 is mounted behind the tractor 1A. Specifically, the multi-film laying apparatus 300 is mounted on the rotary cultivator 2 mounted on the rear portion of the tractor 1A. The multi-film laying apparatus 300 is arranged behind the rotary tiller 2 and in front of the transplanter 3.

The multi-film laying apparatus 300 lays a multi-film on each of the two ridges UN1 and UN2 formed side by side in the width direction of the tractor 1A (the same as the machine width direction K2). Hereinafter, for convenience of description, 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. 56, the multi-film laying apparatus 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 multi-film laid on the first ridge UN1 is wound. The second roll support shaft 302 supports the second film roll 304 around which the multi-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 1A (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 1A (machine width direction K2). In other words, the portion 301a on the machine width inner side of the first roll support shaft 301 overlaps with the portion 302a on the machine width inner side of the second roll support shaft 302 in the machine width direction K2.

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

  As shown in FIG. 56, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be displaced in the front-rear direction K1. Thereby, as shown in FIGS. 1 and 57, the first film roll 303 and the second film roll 304 are arranged so as to be displaced in the front-rear direction K1. In the case of this 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. Although not shown, the first roll support shaft 301 and the second roll support shaft 302 may be arranged so as to be vertically offset from each other.

Both ends of the first roll support shaft 301 are supported by the first shaft support bodies 305L and 305R. The first shaft support 305L supports the left end portion (end portion on the machine width outer side) of the first roll support shaft 301. The first shaft support 305R supports the right end (the end on the inner side of the machine width) of the first roll support shaft 301.
Both ends of the second roll support shaft 302 are supported by the second shaft supports 306L and 306R. The second shaft support 306L supports the left end (the end on the inner side of the machine width) of the second roll support shaft 302. The second shaft support 306R supports the right end portion (the end portion on the outer side of the machine width) of the second roll support shaft 302.

  As shown in FIGS. 58 to 60, the first shaft support 305L is attached to the first side member 196A of the attachment 196 and extends in the machine width direction K2. The first shaft support 305L includes a first support member 307 to a fifth support member 311. The first support member 307 is fixed to the first side member 196A. The second support member 308 is attached to the first support member 307 via the third support member 309 and extends downward from the first support member 307. The fourth support member 310 is attached to the lower portion of the second support member 308, and extends from the lower portion to the machine width outside (left side). One end (front end) of the fifth support member 311 is connected to the outer end of the fourth support member 310 in the machine width direction via a support shaft 312. The fifth support member 311 can swing upward or downward around the support shaft 312. The other end (rear end) of the fifth support member 311 is provided with a recessed engagement portion 311a that is cut out from above to below, and the engagement portion 311a has a first roll support shaft. One end (left end) of 301 is locked. A cover plate 313 for preventing one end portion of the first roll support shaft 301 locked by the locking portion 311a from being detached is fixed by a bolt or the like above the locking portion 311a. As a result, one end portion (left end portion) of the first roll support shaft 301 is supported by the first shaft support body 305L.

  As shown in FIG. 60, the first support member 307 has a plurality of mounting holes 307a arranged in parallel in the machine width direction K2 at intervals. The third support member 309 has mounting holes 309a corresponding to one or a plurality of mounting holes 309a. The first support member 307 and the third support member 309 are fixed by overlapping the mounting hole 307a and the mounting hole 309a, inserting a bolt, and screwing a nut. By shifting the third support member 309 with respect to the first support member 307 in the machine width direction K2 and changing the mounting hole 309a to be overlapped with the mounting hole 307a, the third support member 309 with respect to the first support member 307 is changed. Can be fixed by shifting in the machine width direction K2. As a result, the first roll support shaft 301 can be moved in the machine width direction K2. Similarly, the second roll support shaft 302 can also be moved in the machine width direction K2. Therefore, the range (length) where the first roll support shaft 301 and the second roll support shaft 302 overlap can be changed.

  As shown in FIGS. 57 and 61, the first shaft support body 305R is attached to the intermediate coupling body 55. As described above, the intermediate connecting body 55 connects the rear mounting portion 51Mb of the intermediate ridger 51M and the intermediate member 196C of the mounting body 196. The first shaft support 305R has a fifth support member 313 and a sixth support member 314. The fifth support member 313 is fixed to the intermediate coupling body 55 (upper member 55a) and extends rightward. The sixth support member 314 extends rearward from the right end of the fifth support member 313. The front portion of the sixth support member 314 is pivotably supported on the fifth support member 313. Accordingly, the sixth support member 314 can swing upward or downward with respect to the fifth support member 313. A mounting piece 315 provided at the other end (right end) of the first roll support shaft 301 is attached to the rear end of the sixth support member 314. As a result, the other end portion (right end portion) of the first roll support shaft 301 is supported by the first shaft support body 305R.

  As shown in FIG. 56, the second shaft support body 306R is attached to the second side member 196B of the attachment body 196. The second shaft support 306R is arranged rearward of the first shaft supports 305L and 305R. The second shaft support 306R is symmetrical to the first shaft support 305L with the center in the machine width direction K2 sandwiched between the first shaft support 305L and the front-rear direction K1. Except for this point, the configuration of the second shaft support 306R is the same as the configuration of the first shaft support 305L, and thus the description thereof will be omitted.

  As shown in FIGS. 56 and 61, the second shaft support body 306L is attached to the intermediate coupling body 55. The second shaft support 306L is arranged rearward of the first shaft supports 305L and 305R. The second shaft support 306L is arranged at the same position as the second shaft support 306R in the front-rear direction K1. The second shaft support 306L is symmetrical to the first shaft support 305R with the center in the machine width direction K2 sandwiched between the first shaft support 305R and the front-rear direction K1. Except for this point, the configuration of the second shaft support 306L is the same as the configuration of the first shaft support 305R, and thus the description thereof will be omitted.

As shown in FIG. 56, the multi-film laying apparatus 300 has a first soil covering member 321, 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, the second soil covering member 322, the third soil covering member 323, and the fourth soil covering member 324 are each formed of a disk-shaped soil covering disk.
The 1st earth covering member 321 and the 3rd earth covering member 323 are provided in the shape of an inclination which shifts to the 1st ridge UN1 side as it goes back. The 2nd soil covering member 322 and the 4th soil covering member 324 are provided in the shape of an inclination which shifts to the 2nd ridge UN2 side as it goes back.

  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) on the second ridge UN2 side of the multi-film unwound from the first film roll 303 and laid on the first ridge UN1. 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 the one end (left end) on the first ridge UN1 side of the multi-film unwound from the second film roll 304 and laid on the second ridge UN2.

  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 multi-film unwound from the first film roll 303 and laid on the first ridge UN1 with soil. 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.

  The first soil covering member 321 and the second soil covering member 322 are arranged so as to be displaced in the front-rear direction K1. In the case of this embodiment, the first soil covering member 321 is arranged in front of the second soil covering member 322. However, it is sufficient that one of the first soil cover member 321 and the second soil cover member 322 is disposed behind the other soil cover member. Which of the first soil cover member 321 and the second soil cover member 322 is arranged rearward can be determined by the front-rear relationship between the first roll support shaft 301 and the second roll support shaft 302. Specifically, when the second roll support shaft 302 is arranged behind the first roll support shaft 301, the second soil covering member 322 is arranged behind the first soil covering member 321. When the first roll support shaft 301 is arranged behind the second roll support shaft 302, the first soil covering member 321 is arranged behind the second soil covering member 322.

Further, the first soil covering member 321 and the second soil covering member 322 are arranged so as to overlap each other in the width direction of the tractor 1A (machine width direction K2). The first soil covering member 321 and the second soil covering member 322 also overlap in the front-rear direction K1.
The third soil covering member 323 is arranged at the same position as the first soil covering member 321 in the front-rear direction K1. The fourth soil covering member 324 is arranged at the same position as the second soil covering member 322 in the front-rear direction K1. That is, the third soil covering member 323 and the fourth soil covering member 324 are arranged so as to be displaced in the front-rear direction K1 similarly to the arrangement of the first soil covering member 321 and the second soil covering member 322.

  It is preferable that the lower end portion of the soil covering member (one of the soil covering members) arranged rearward is located below the lower end portion of the soil covering member (the other soil covering member) arranged in the front. In the case of the present embodiment, it is preferable that the lower end portion of the second soil covering member 322 is located below the lower end portion of the first soil covering member 321. According to this structure, the second soil covering member 322 can bring soil from a position deeper than the first soil covering member 321. Therefore, the first soil covering member 321 and the second soil covering member 322 overlap in the machine width direction K2. Even if the second soil cover member 322 is arranged rearward, the soil collected by the second soil cover member 322 does not run short.

As shown in FIGS. 56, 57, and 61, the first soil covering member 321 and the second soil covering member 322 are attached to the intermediate coupling body 55 via the first connection frame 325 and the bracket 326. The first connection frame 325 is connected to the bracket 326 fixed to the intermediate coupling body 55 so as to be swingable upward or downward.
As shown in FIGS. 56, 58, and 59, the third soil covering member 323 is attached to the first side member 196A via the second connection frame 327, the bracket 328, and the first supporting member 307. The second connection frame 327 is swingably connected to a bracket 328 fixed to the first support member 307 via a support shaft 316 so as to be swingable upward or downward.

As shown in FIG. 56, the fourth soil covering member 324 is attached to the second side member 196B via the third connection frame 329 and the like. Since the mounting structure of the fourth soil covering member 324 to the second side member 196B is the same as the mounting structure of the third soil covering member 323 to the first side member 196A, the description thereof will be omitted.
As shown in FIG. 56, the multi-film laying apparatus 300 has a first film retainer 331, a second film retainer 332, a third film retainer 333, and a fourth film retainer 334. The first film retainer 331, the second film retainer 332, the third film retainer 333, and the fourth film retainer 334 are composed of wheels, for example.

The first film retainer 331 and the third film retainer 333 are provided in an inclined shape that moves toward the first ridge UN1 side as it goes forward. The second film retainer 332 and the fourth film retainer 334 are provided in an inclined shape that moves toward the second ridge UN2 side as it goes forward.
The first film retainer 331 is arranged behind the first film roll 303. The first film retainer 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 retainer 332 is arranged behind the second film roll 304. The second film retainer 332 presses one end (left end) on the first ridge UN1 side (left side) of the multi-film laid on the second ridge UN2. The third film retainer 333 is arranged behind the first film roll 303. The third film retainer 333 holds down the other end (left end) of the multi-film laid on the first ridge UN1. The fourth film retainer 334 is arranged behind the second film roll 304. The fourth film retainer 334 holds the other end (right end) of the multi-film laid on the second ridge UN2.

  The first film retainer 331 and the second film retainer 332 are arranged so as to be displaced in the front-rear direction K1. In the case of this embodiment, the first film retainer 331 is arranged in front of the second film retainer 332. When the first roll support shaft 301 is disposed behind the second roll support shaft 302, the first film retainer 331 is disposed behind the second film retainer 332.

  The third film retainer 333 is arranged at the same position as the first film retainer 331 in the front-rear direction K1. The fourth film retainer 334 is arranged at the same position as the second film retainer 332 in the front-rear direction K1. That is, the third film retainer 333 and the fourth film retainer 334 are arranged so as to be displaced in the front-rear direction K1 similarly to the arrangement of the first film retainer 331 and the second film retainer 332.

  As shown in FIG. 61, the first film retainer 331 is connected to the first connection frame 325 via the first connection body 335. The second film retainer 332 is connected to the first connection frame 325 via the second connection body 336. As shown in FIGS. 58 and 59, the third film retainer 333 is attached to the second connection frame 327 via the third connection body 337. As shown in FIG. 56, the fourth film retainer 334 is attached to the third connection frame 329 via the fourth connection body 338.

The working machine 1 of the present embodiment has the following effects.
The working machine 1 includes a first ground working machine 2 mounted on the rear part of the traveling body 1A, a second ground working machine 3 mounted on the rear part of the first ground working machine 2 so as to be vertically movable, and for planting seedlings in a field. A lifting drive device 42 that drives the second ground work machine 3 up and down, a chair on which a worker working on the second ground work machine 3 sits (first front chair 187A, second front chair 184B), and The ground work machine 2 is provided with a work machine connecting mechanism 41 that connects the second ground work machine 3 and the chairs 187A and 184B so as to be integrally movable up and down.

  According to this configuration, since the second ground work machine 3 and the chairs 187A and 187B are integrally connected to the first ground work machine 2 so that the work machine connection mechanism 41 can be moved up and down, the traveling body 1A is provided. In the working machine including the first ground work machine 2 to be mounted and the second ground work machine 3 mounted to the second ground work machine 3 so as to be able to move up and down, the heights of the chairs 187A and 187B on which the worker sits and the second The relationship with the height of the ground work implement 3 can be made constant. Therefore, even when the second ground working machine 3 is moved up and down, the worker sitting on the chairs 187A and 187B can easily work on the second ground working machine 3.

Further, the work implement connecting mechanism 41 includes a toolbar 43 to which the second ground work implement 3 is attached, and a chair support 150 which is connected to the toolbar 43 and supports chairs (first front chair 187A, second front chair 184B). The tool bar 43 and the chair support 150 are connected to the first ground work implement 2 so as to be able to move up and down.
According to this configuration, since the tool bar 43 and the chair support 150 can be integrally lifted by the connection link mechanism 44, by lifting the tool bar 43, the chairs 187A and 187B on which the worker sits and the second ground work machine. 3 and 3 can be integrally lifted.

  Further, the connection link mechanism 44 has lower links 44A, 44B and an upper link 44C, and the lower links 44A, 44B are located at one end side of the tool bar 43 in the length direction of the chair support 150 and the first ground work implement 2. And a second lower link 44B for connecting the chair support 150 and the first ground work implement 2 on the other end side in the length direction of the tool bar 43, and an upper link. 44C connects the chair support 150 and the first ground work implement 2 at the center of the tool bar 43 in the length direction.

According to this configuration, since the connecting link mechanism 44 can be configured as a parallel link, the chair support 150 and the second ground work implement 3 can be raised and lowered parallel to the ground.
Further, the connection link mechanism 44 has a connection member 44D that connects the first lower link 44A and the second lower link 44B.
According to this configuration, the first lower link 44A and the second lower link 44B can be connected and integrated, so that the occurrence of twist between the first lower link 44A and the second lower link 44B is prevented. can do.

The lifting drive device 42 also includes a lifting cylinder C1 that connects the first ground work implement 2 and the upper link 44C.
According to this configuration, the upper and lower links 44C can be moved up and down by expanding and contracting the lifting cylinder C1, and the chair support 150 and the second ground work machine 3 can be moved up and down with respect to the first ground work machine 2.

In addition, the second ground work implement 3 is connected to the work implement connecting mechanism 41 and is moved up and down by the elevating drive device 42. And a planting tool 64 for planting seedlings, and the machine frame 37 is attached to the tool bar 43.
According to this configuration, by raising and lowering the tool bar 43 by the raising and lowering drive device 42, it is possible to raise and lower the planting tool 64 together with the machine frame 37 to adjust the planting depth.

Further, the working machine 1 is provided with spare seedling stands 280L and 280R for mounting the container CN that accommodates the seedling trays, and the spare seedling stands 280L and 280R are arranged above the first ground work machine 2.
According to this configuration, the container CN accommodating the seedling tray can be placed on the preliminary seedling stands 280L and 280R arranged above the first ground work machine 2. Therefore, it is possible to replenish the seedling tray above the first ground work machine 2 in a state of being housed in the container CN without taking out the seedling tray from the container CN.

Further, the working machine 1 includes a tube roll 290 around which an irrigation tube that supplies water to the planted seedlings is wound, and the tube roll 290 is arranged between the traveling body 1A and the first ground work machine 2. .
According to this configuration, the tube roll 290 can be arranged at a lower position than the case where the tube roll 290 around which the watering tube is wound is arranged above the first ground work implement 2. Therefore, the tube roll 290 can be easily attached and detached.

  The working machine 1 includes a first ground work machine 2 mounted on the rear part of the traveling body 1A, a second ground work machine 3 mounted on the rear part of the first ground work machine 2 and planting seedlings in a field. 1. Chairs (first front chair 187A, second front chair 184B), which are arranged above the first ground working machine 2 and on which the worker working on the second ground working machine 3 sits, and the second ground working machine 3 A position adjusting mechanism 230 that can adjust the positions of the chairs 187A and 184B is provided.

According to this configuration, since the position adjusting mechanism 230 that can adjust the position with respect to the second ground work machine 3 that receives the seedlings is provided, the chair can be used in response to changes in the spacing of the seedlings to be planted or the height of the ridges. The positions of 187A and 187B can be adjusted.
Further, the position adjusting mechanism 230 has a first position adjusting mechanism 231 capable of adjusting the positions of the chairs (first front chair 187A, second front chair 184B) in the machine width direction K2 which is the width direction of the work machine 1. ing.

With this configuration, the first position adjustment mechanism 231 can adjust the positions of the chairs 187A and 187B in the machine width direction K2 in response to changes in the spacing of the seedlings to be planted.
Further, the position adjusting mechanism 230 has a second position adjusting mechanism 232 capable of adjusting the positions of the chairs (first front chair 187A, second front chair 184B) in the front-rear direction K1.
With this configuration, the second position adjusting mechanism 232 can adjust the positions of the chairs 187A and 187B in the front-rear direction in accordance with the physique of the worker.

Further, the position adjusting mechanism 230 has a third position adjusting mechanism 232 capable of vertically adjusting the positions of the chairs (the first front chair 187A and the second front chair 184B).
According to this configuration, the third position adjusting mechanism 233 allows the chairs 187A, 187B to correspond to the ridge height, the height of the sleeve (the sleeve fitted in the supply cups 171 and 172), the physique of the worker, and the like. The position can be adjusted vertically.

  Further, the work implement 1 is a work implement coupling mechanism that integrally connects the second ground work implement 3 and the chairs (the first front chair 187A and the second front chair 184B) to the first ground work implement 2 so as to be vertically movable. The working machine coupling mechanism 41 includes a tool bar 43 to which the second ground working machine 3 is attached, and a chair support that is connected to the tool bar 43 and supports chairs (first front chair 187A, second front chair 184B). 150, and the position adjustment mechanism 230 is provided on the chair support 150.

According to this configuration, the positions of the chairs 187A and 187B are adjusted by the position adjusting mechanism 230 while keeping the relationship between the height of the chairs 187A and 187B on which the worker sits and the height of the second ground work machine 3 constant. You can Therefore, the positions of the chairs 187A and 187B with respect to the second ground work implement 3 can be adjusted accurately and easily.
Further, the working machine 1 is arranged between the chairs (first front chair 187A, second front chair 184B) and the second ground working machine 3 and is mounted on the chairs (first front chair 187A, second front chair 184B). It is provided with footrest plates 235A and 235B on which the seated worker puts his / her feet, and the chair support 150 has attachment parts 260A and 260B to which the footrest plates 235A and 235B are detachably or removably attached.

  According to this configuration, by removing or opening the footrest plates 235A, 235B with respect to the attachment portions 260A, 260B, it is easy to access the footrest plates 235A, 235B below. Therefore, for example, adjustment of the spring of the elastic pressure device 20 of the rotary cultivator 2, adjustment of the distance between the first transplantation unit 36A and the second transplantation unit 36B (spacing adjustment), position adjustment of the irrigation tube, etc. are facilitated. It can be carried out.

Further, the working machine 1 is a seedling supply device 38 that transfers a large number of supply cups 171 and 172 that store seedlings along a loop-shaped transfer route R1, and a seedling for placing seedlings supplied to the seedling supply device 38. And a feeding table 188, and the seedling feeding table 188 is attached to the chair support 150.
According to this configuration, since the seedling supply table 188 is attached to the chair support 150, the positional relationship between the seedling supply stand 188 and the chair supported by the chair support 150 can be fixed. Therefore, the seedlings can be stably supplied from the seedling supplying table 188 to the seedling supplying device 38.

Further, the seedling supply table 188 can be changed to a first posture in which the seedling placing surface faces the horizontal direction and a second posture in which the seedling placing surface faces the vertical direction.
According to this configuration, when the seedling supplying device 38 is not supplied with seedlings, the seedling placing base 188 is set to the second posture, so that the seedling placing base 188 can be prevented from obstructing the movement of the operator. .

  Further, the working machine 1 is a transplanter 3 having a traveling body 1A, a machine frame 37 mounted behind the traveling body 1A, and a planting device 39 supported by the machine frame 37 and for planting seedlings in a field. An elevating and lowering drive device 42 for elevating and lowering the machine frame 37 with respect to the traveling body 1A, a detection member 83 that moves up and down following the unevenness of the field, a wire 97 that moves as the detection member 83 moves vertically, A control valve 165 that switches the lifting drive device 42 between a first state in which the machine frame 37 is raised and a second state in which the machine frame 37 is lowered in accordance with the movement of 97 is provided.

According to this configuration, the control valve 165 is moved between the first state in which the machine frame 37 of the transplanter 3 is raised and the second state in which the wire 97 is moved by the movement of the wire 97 in accordance with the vertical movement of the detection member 83 that follows the unevenness of the field. Since they can be switched, the planting depth can be adjusted accurately with a simple structure. Thereby, the variation in the planting depth can be reduced.
Further, the working machine 1 includes a support frame 82 that supports the detection member 83 so as to be vertically movable with respect to the machine frame 37. The support frame 82 is vertically swingable with respect to the machine frame 37 and is a detection member. It is arranged above 83.

  According to this configuration, as compared with the case where the support frame 82 is arranged laterally of the detection member 82, the adjacent detection members 83 (for example, the earth covering wheels 81L and 81R of the left first earth covering device 40AL and the right earth covering wheels 81L and 81R The interval between the soil-covering wheels 81L and 81R of the first soil-covering device 40AR can be narrowed. Therefore, it is possible to reduce the distance between the seedlings for planting while avoiding the interference between the support frames 82.

  Further, the transplanter 3 is arranged on one side in the width direction of the transplanter 3 and has a first transplantation unit 36A having a plurality of first planting devices 39AL, 39AR, and the other side in the width direction of the transplanter 3. A second transplantation unit 36B that is disposed in the first transplantation device 39BL, 39BR and has a plurality of second transplantation devices 39BL and 39BR, and a distance adjustment mechanism that adjusts the distance between the first transplantation unit 36A and the second transplantation unit 36B. 1. A first angle adjusting mechanism capable of adjusting the relative angle between the planting devices 39AL and 39AR, and a second angle adjusting mechanism capable of adjusting the relative angle between the plurality of second planting devices 39BL and 39BR. I have it.

  With this configuration, the distance adjustment mechanism can adjust the distance between the first transplantation unit 36A and the second transplantation unit 36B. In addition, the first angle adjusting mechanism and the second angle adjusting mechanism adjust the relative angle between the transplanting devices in each transplantation unit, thereby adjusting the distance between the transplanting devices in each transplantation unit. it can. That is, it is possible to perform adjustment in units of units and in units of planting devices in each unit. Therefore, it becomes possible to adjust the striations corresponding to various planting forms such as 1 row of 4 ridges and 2 rows of 2 ridges.

  In addition, the working machine 1 is provided with a tool bar 43 arranged in the rear of the traveling body 1A and extending in the width direction, and the distance adjusting mechanism is movably attached along the tool bar 43 and fixed to the first transplantation unit 36A. It has a first mounting tool 61A and a second mounting tool 61B that is movably mounted along the tool bar 43 and is fixed to the second transplantation unit 36B.

According to this configuration, the first transplantation unit 36A and the second transplantation unit 36B can be independently moved along the toolbar 43, so that the distance between the first transplantation unit 36A and the second transplantation unit 36B can be reduced. Adjustment can be easily performed.
In addition, the machine casing 37 includes a first machine casing 37A to which the plurality of first planting devices 39AL and 39AR are mounted and a second machine casing 37B to which the plurality of second planting devices 39BL and 39BR are mounted. Including, the 1st transplantation unit 36A has the 1st machine frame 37A, the 2nd transplantation unit 36B has the 2nd machine frame 37B, the 1st angle adjustment mechanism of the plural 1st planting devices 39AL, 39AR The mounting angle with respect to the first machine casing 37A can be individually adjusted, and the second angle adjustment mechanism can individually adjust the mounting angles of the plurality of second planting devices 39BL and 39BR with respect to the second machine casing 37B.

According to this configuration, the mounting angles of the plurality of first planting devices 39AL and 39AR with respect to the first machine frame 37A and the mounting angles of the plurality of second planting devices 39BL and 39BR with respect to the second machine frame 37B are respectively Since they can be adjusted individually, it becomes possible to easily adjust the striation adjustment corresponding to various planting forms.
In addition, the first transplantation unit 36A has a plurality of first soil covering devices 40AL and 40AR attached to the first machine casing 37A corresponding to the plurality of first transplanting devices 39AL and 39AR, respectively, and the second transplanting unit The unit 36B includes a plurality of second soil cover devices 40BL and 40BR attached to the second machine casing 37B corresponding to the plurality of second planting devices 39BL and 39BR, respectively. It has the 1st position adjustment part which adjusts the position of the devices 40AL and 40AR in the width direction, and the 2nd position adjustment part which adjusts the position of the 2nd soil covering devices 40BL and 40BR in the width direction.

According to this configuration, the positions of the plurality of soil covering devices can be adjusted corresponding to the adjustment of the positions of the plurality of planting devices, so that the work of planting and covering the soil corresponding to various planting forms can be performed. Is possible.
In addition, the working machine 1 includes a prime mover E1, a main shaft 107 which receives power from the prime mover E1 and rotates around an axis extending in the width direction, and rotational power of the main shaft 107 to the first transplantation unit 36A and the second transplantation unit 36B. The main shaft 107 includes a first rotating shaft 107A that rotates by receiving power from the prime mover E1, a second rotating shaft 107B that rotates by receiving power from the first rotating shaft 107A, and And a connecting shaft 107L connecting the first rotating shaft 107A and the second rotating shaft 107B. The first rotating shaft 107A and the second rotating shaft 107B are movable in the width direction with respect to the connecting shaft 107L. is there.

According to this configuration, the length of the main shaft 107 can be adjusted corresponding to the adjustment of the distance between the first transplantation unit 36A and the second transplantation unit 36B, and the first transplantation unit 36A and the second transplantation unit 36A can be adjusted. Power can be reliably transmitted to the transplant unit 36B.
The first rotating shaft 107A and the second rotating shaft 107B are spline shafts, and the connecting shaft 107L is a spline bearing with which the spline shafts mesh.

According to this configuration, the length of the main shaft 107 can be easily adjusted corresponding to the adjustment of the distance between the first transplantation unit 36A and the second transplantation unit 36B, and at the same time, the first transplantation unit 36A. Also, the power can be reliably transmitted to the second transplantation unit 36B.
Further, the working machine 1 is a traveling body 1A and a ground working machine mounted behind the traveling body 1A, and transfers a large number of supply cups 171 and 172 containing seedlings along a loop-shaped transfer route R1. And a ground work machine (second ground work machine) 3 having a seedling supply device 38 including a transfer mechanism 177 and a planting tool 64 for planting the seedlings supplied from the seedling supply device 38 in a field. 177 is wound around the first rotating body 178, the second rotating body 179, the first rotating body 178 and the second rotating body 179, and is rotated with the rotation of the first rotating body 178 and the second rotating body 179. It has an endless cord 180 that moves together with the supply cups 171 and 172, and a guide member 173 that guides the movement of the cord 180.

According to this configuration, since the guide member 173 that guides the movement of the endless cord 180 that moves together with the supply cups 171 and 172 is provided, the slack of the cord 180 is prevented and the supply cups 171 and 172 are transferred. It can be done smoothly.
Further, the seedling supply device 38 has a device frame 176 that supports the transfer mechanism 177, and the guide member 173 is attached to the device frame 176 and the first guide members 174L and 174R, and is attached to the cord 180. And a second guide member 175 that moves while contacting the first guide members 174L and 174R.

According to this configuration, the second guide member 175 moves in contact with the first guide members 174L and 174R as the cord 180 moves. Therefore, it is possible to prevent the cord 180 from loosening during movement and to smoothly transfer the supply cups 171 and 172.
Further, the supply cups 171 and 172 can be opened and closed to close the openings of the storage portions 181a and 181b that store seedlings and have openings at the lower ends, the attachment portions 182a and 182b that are attached to the rope 180, and the storage portions 181a and 181b. The seedling feeding device 38 has a setting member 185 for setting the open positions D1 and D2 of the lids 183a and 183b in a part of the transfer route R1, and the guide member 173 is at least opened. The movement of the cord 180 is guided at the positions D1 and D2.

With this configuration, at the open positions D1 and D2 of the lids 183a and 183b, the guide member 173 can suppress the swinging or loosening of the cord 180. Therefore, it is possible to prevent the seedlings from dropping due to the lids 183a and 183b opening at unintended positions or timings.
Further, the work machine 1 has a tension imparting body (fifth idler 255, sixth idler 256) for imparting tension to the cord 180, and the tension imparting body applies tension to the cord 180 at the open positions D1 and D2. Give.

According to this configuration, at the open positions D1 and D2 of the lids 183a and 183b, the tension applying body can suppress the swinging and loosening of the cord 180. Therefore, it is possible to prevent the seedlings from dropping due to the lids 183a and 183b opening at unintended positions or timings.
Further, the cord 180 is a chain, and the tension applying bodies (the fifth idler 255 and the sixth idler 256) are sprockets which mesh with the chain and rotate.

With this configuration, the tension applying body can apply tension to the cord 180 without hindering the rotation of the cord 180.
Further, the first guide members 174L and 174R have extended surfaces 174La and 174Ra extending along the moving direction of the cord 180, and the second guide member 175 has the attachment portion 175a attached to the cord 180, And contact portions 175b that move while contacting the extended surfaces 174La and 174Ra.

With this configuration, the contact portion 175b of the second guide member 175 and the extended surfaces 174La and 174Ra of the first guide member 174L and the first guide member 174R can be brought into contact with each other. Therefore, it is possible to suppress the swinging or slacking of the rope 180 in the machine width direction and the vertical swinging or loosening of the rope 180.
Further, the working machine 1 includes a traveling body 1A, a rotary cultivator 2 attached to a rear portion of the traveling body 1A, and a ridger 51 having an attachment portion attached to the rotary cultivator 2, and the attachment portion is The front mounting portions 51La, 51Ra, 51Ma provided at the front portion of the ridger 51 and the rear mounting portions 51Lb, 51Rb, 51Mb provided at the rear portion of the ridger 51 are included.

  According to this configuration, since the ridger 51 is attached to the rotary cultivator 2 by the front attachment portions 51La, 51Ra, 51Ma and the rear attachment portions 51Lb, 51Rb, 51Mb, the load applied to the attachment portion of the ridger is applied. Can be dispersed. Therefore, it is possible to prevent an excessive load from being applied to the attachment portion of the ridge riser 51 even in a field where the advance plowing is not sufficiently performed.

  Further, the rotary tiller 2 includes a tiller 18 for tilling the field, a rotary machine frame 11, a rotary cover 19 attached to the rotary machine frame 11 for covering the tiller 18, and a transmission for transmitting power to the tiller 18. And a transmission case 12 accommodating the mechanism, a mounting body 196 is attached to the rotary machine frame 11, and the front mounting portions 51La, 51Ra, and 51Ma are attached to the rotary cover 19 or the transmission case 12. The rear mounting portions 51Lb, 51Rb, 51Mb are mounted on the mounting body 196.

  According to this structure, the front attachment parts 51La, 51Ra, 51Ma and the rear attachment parts 51Lb, 51Rb, 51Mb can be reliably attached to the rotary cultivator 2. In particular, in the center drive type rotary cultivator 2, if there is a ridger behind the transmission case 12, the ridger is likely to be worn due to residual tillage, but by attaching the front mounting portion 51Ma to the transmission case 12. The wear of the ridger behind the transmission case 12 can be prevented.

  Further, the rotary cover 19 has an upper cover 19A that covers the upper part of the tilling part 18, a rear cover 19B that covers the rear of the tilling part 18, and a side cover 19C that covers the sides of the tilling part 18, and the transmission. The case 12 is arranged at the center in the width direction of the rotary cultivator 2, and the ridge former 51 includes side ridge formers 51L and 51R in which front attachment portions 51La and 51Ra are attached to the side cover 19C, and front attachment portions. The portion 51Ma includes an intermediate ridger 51M attached to the transmission case 12.

With this configuration, the side ridge risers 51L and 51R and the intermediate ridge riser 51M can be reliably attached to the rotary cultivator 2 at different positions in the width direction.
Further, the outer ends in the width direction of the side ridge risers 51L and 51R are positioned outside the outer ends in the width direction of the side cover 19C.
According to this structure, since the distance between the side ridger 51L, 51R and the intermediate ridger 51M can be increased, the ridge width can be widened.

  The side cover 19C includes a first side cover 19CL arranged on one side in the width direction and a second side cover 19CR arranged on the other side in the width direction, and has a mounting body 196. Is between the first side member 196A attached to the first side cover 19CL, the second side member 196B attached to the second side cover 19CR, and the first side member 196A and the second side member 196B. And the intermediate member 196C disposed on the side ridges 51L and 51R, and the side ridges 51L and 51R are arranged on one side in the width direction and on the other side in the width direction. The rear mounting portion 51Lb including the arranged second side ridger 51R and the first side ridger 51L is attached to the first side member 196A, and the second side ridger 51R is attached. The mounting portion 51Rb is mounted on the second side member 196B. Is, mounting portion 51Mb after the intermediate ribbing devices 51M is attached to the intermediate member 196C.

According to this configuration, the rear attachment portions 51Lb and 51Rb can be attached to the side cover 19C via the first side member 196A and the second side member 196B. Further, the rear attachment portion 51Mb can be arranged between the first side member 196A and the second side member 196B by the intermediate member 196C.
Further, the working machine 1 is equipped with a transplanter 3 which is mounted on the rear part of the rotary tiller 2 and which plant seedlings in a field, the ridger 51 is arranged in front of the transplanter 3, and the transplanter 3 is the ridger. Seedlings are planted in the ridges formed by 51.

According to this configuration, even in a field in which pre-cultivation is not sufficiently performed, it is possible to surely form the ridges by the ridger 51 and plant seedlings in the ridges formed by the transplanter 3.
Also, the multi-film laying apparatus 300 is. A multi-film laying device mounted on the rear of the traveling body 1A and laying a multi-film on a ridge formed in a field, wherein the multi-film laid on the first ridge UN1 is wound around the first film roll. A first roll support shaft 301 that supports 303, and a second roll support shaft 302 that supports a second film roll 304 around which a multi-film laid on a second ridge UN2 adjacent to the first ridge UN1 is wound. The first roll support shaft 301 and the second roll support shaft 302 are extended in the width direction of the traveling body 1A and overlap each other in the width direction.

According to this structure, since the distance between the first film roll 303 and the second film roll 303 can be narrowed, it is possible to lay a multi-film with a narrow ridge between two adjacent ridges. Therefore, the mulch film can be satisfactorily laid even in a field where a large number of ridges are formed at narrow intervals.
Further, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be displaced in the front-rear direction.

According to this configuration, the first roll support shaft 301 and the second roll support shaft 302 are displaced in the front-rear direction, so that the first roll support shaft 301 and the second roll support shaft 302 are separated from each other in the width direction of the traveling body 1A. It is possible to reliably overlap.
The first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be vertically offset from each other.

According to this configuration, the first roll support shaft 301 and the second roll support shaft 302 are vertically displaced from each other, so that the first roll support shaft 301 and the second roll support shaft 302 are separated from each other in the width direction of the traveling body 1A. It is possible to reliably overlap.
Further, the multi-film laying device 300 includes a first soil cover member 321 for covering the end of the multi-film laid on the first ridge UN1 on the second ridge UN2 side with a multi-layer laid on the second ridge UN2. The 2nd soil covering member 322 which covers the end part by the side of the 1st ridge UN1 of the film with soil, and the 1st soil covering member 321 and the 2nd soil covering member 322 are displaced in the direction of order.

According to this configuration, the interval between the first soil covering member 321 and the second soil covering member 322 can be narrowed in the width direction of the traveling vehicle 1A. Therefore, it is possible to satisfactorily cover the soil of the ends of the mulch film laid on the ridges formed at narrow intervals.
Further, the first soil covering member 321 and the second soil covering member 322 are arranged so as to overlap each other in the width direction of the traveling vehicle 1A.

According to this configuration, after the mulch film is laid by narrowing the ridges between the two adjacent ridges (the first ridge and the second ridge), the first soil cover is applied to the end of the laid mulch film. The member 321 and the second soil covering member 322 can surely cover the soil.
In addition, one of the first soil cover member 321 and the second soil cover member 322 is disposed behind the other soil cover member, and the lower end portion of the one soil cover member is the lower end portion of the other soil cover member. It is located below.

  According to this configuration, of the first soil-covering member 321 and the second soil-covering member 322, the soil-covering member on the front side brings the soil to cover the soil and then the soil-covering member on the rear side brings the soil from a position deeper than the soil-covering member on the front side. Can be covered with soil. Therefore, since the soil is attracted by the front soil cover member, the soil attracted by the rear soil cover member does not run short, and the soil can be reliably covered by both the first soil cover member 321 and the second soil cover member 322. It will be possible.

  Further, the multi-film laying device 300 includes a first film retainer 331 for suppressing an end portion of the multi-film laid on the first ridge UN1 on the second ridge UN2 side, and a multi-film laid on the second ridge UN2. And a second film retainer 332 that presses the end portion of the first ridge UN1 side, and the first film retainer 331 and the second film retainer 332 are arranged to be displaced in the front-rear direction.

According to this configuration, when the mulch film is laid by narrowing the ridge between two adjacent ridges (the first ridge and the second ridge), one end of the mulch film to be laid is The film retainer 331 and the second film retainer 332 can surely press the film.
In addition, the working machine 1 includes the above-mentioned mulch film laying apparatus 300, and a transplanting machine 3 mounted behind the traveling body 1A and for planting seedlings in the ridges.

With this configuration, the seedling transplanting operation and the mulch film laying operation can be performed together.
Although one embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is an exemplification in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

1 Working Machine 1A Traveling Body 2 First Ground Working Machine 3 Second Ground Working Machine 42 Lift Drive 187A Chair (First Front Chair)
187B Chair (2nd front chair)
41 Working Machine Connection Mechanism 43 Toolbar 150 Chair Support 44 Connection Link Mechanism 44A Lower Link (First Lower Link)
44B Lower link (second lower link)
44C Upper link 44D Connecting member C1 Lifting cylinder 37 Machine frame 64 Planting equipment CN container 280L Spare seedling stand 280R Spare seedling stand 290 Tube roll

Claims (8)

A first ground work machine mounted on the rear part of the traveling body,
A second ground work machine which is attached to the rear part of the first ground work machine so as to be able to move up and down and which is used to plant seedlings in a field
An elevating drive device for elevating the second ground work machine;
A chair on which a worker working on the second ground work machine sits;
A work machine connecting mechanism that integrally and vertically connects the second ground work machine and the chair to the first ground work machine;
A working machine equipped with. The working machine connection mechanism is
A toolbar to which the second ground work implement is attached,
A chair support connected to the toolbar and supporting the chair;
A connection link mechanism for connecting the toolbar and the chair support to the first ground work implement so as to be able to move up and down;
The working machine according to claim 1, further comprising: The connection link mechanism has a lower link and an upper link,
The lower link includes a first lower link that connects the chair support to the first ground work implement at one end of the toolbar in the longitudinal direction, and the chair support at the other end of the toolbar in the longitudinal direction. A second lower link connecting the body and the first ground work machine,
The work machine according to claim 2, wherein the upper link connects the chair support body and the first ground work machine at a central portion in the longitudinal direction of the toolbar.   The working machine according to claim 3, wherein the connection link mechanism includes a connection member that connects the first lower link and the second lower link.   The working machine according to claim 3 or 4, wherein the lifting drive device includes a lifting cylinder that connects the first ground work machine and the upper link. The second ground work machine,
A machine frame which is connected to the working machine connection mechanism and is moved up and down by the lifting drive device,
A planting tool that is supported by the machine frame so as to be able to move up and down and plunges into a field to plant seedlings when descending,
Have
The work machine according to claim 2, wherein the machine frame is attached to the toolbar. Equipped with a spare seedling stand for mounting a container that holds a seedling tray,
The working machine according to any one of claims 1 to 6, wherein the preliminary seedling stand is arranged above the first ground working machine. Equipped with a tube roll wound with an irrigation tube that supplies water to the planted seedling,
The working machine according to any one of claims 1 to 7, wherein the tube roll is arranged between the traveling body and the first ground work machine.

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