JP6983743B2 - Working machine - Google Patents

Description

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

Conventionally, a working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 includes a tractor, a tilling device attached to the rear of the tractor, a seedling supply section arranged behind the tilling device, and the like. In addition, a chair on which the worker sits is provided above the tilling device and in front of the seedling supply section. Then, the tilling device, the seedling supply unit, and the like can be raised and lowered with respect to the tractor by the mounting means including the three-point link mechanism provided at the rear portion of the tractor.

Japanese Unexamined Patent Publication No. 10-127112

However, with the above-mentioned working machine, the seedling supply unit and the like cannot be raised and lowered with respect to the tilling device. Further, in the above working machine, the chair on which the worker sits moves up and down together with the tilling device. Therefore, if the seedling supply 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 supply unit. Is not constant. Therefore, it may be difficult to supply seedlings to the seedling supply unit.

In view of the above circumstances, the present invention relates to a work machine provided with a first ground work machine mounted on a traveling body and a second ground work machine mounted on a second ground work machine so as to be able to move up and down. It is intended to provide a working machine capable of keeping the relationship between the height of the chair on which the worker sits and the height of the second ground working machine constant.

The working machine according to one aspect of the present invention includes a first ground working machine mounted on the rear part of a traveling body and a second ground working machine mounted on the rear part of the first ground working machine so as to be able to move up and down and plant seedlings in a field. The machine, the elevating drive device that drives the second ground work machine up and down, the chair on which the worker who works on the second ground work machine sits, and the second ground work machine with respect to the first ground work machine. It is provided with a working machine connecting mechanism for integrally connecting the working machine and the chair so as to be able to move up and down.

Further, the working machine connecting mechanism includes a toolbar to which the second ground working machine is attached, a chair support connected to the toolbar and supporting the chair, and the first ground working of the toolbar and the chair support. It has a connecting link mechanism that connects to the machine so that it can be raised and lowered.
Further, the connecting link mechanism has a lower link and an upper link, and the lower link connects the chair support and the first ground work machine on one end side in the length direction of the toolbar. It has a lower link and a second lower link connecting the chair support and the first ground work machine on the other end side of the toolbar in the length direction, and the upper link is the length of the toolbar. The chair support and the first ground work machine are connected at the central portion in the direction.

Further, the connecting link mechanism has a connecting member that connects the first lower link and the second lower link.
Further, the elevating drive device has an elevating cylinder that connects the first ground working machine and the upper link.
Further, the second ground working machine is connected to the working machine connecting mechanism and is lifted and lowered by the lifting drive device, and is supported by the machine frame so as to be liftable and rushes into the field when descending. It has a planting tool for planting seedlings, and the machine frame is attached to the toolbar.

Further, the working machine is provided with a spare seedling stand for mounting a container for accommodating the seedling tray, and the spare seedling stand is arranged above the first ground working machine.
Further, the working machine includes a tube roll wound with an irrigation tube for supplying water to the planted seedlings, and the tube roll is arranged between the traveling body and the first ground working machine.

According to the above-mentioned working machine, since the working machine connecting mechanism for integrally connecting the second ground working machine and the chair to the first ground working machine is provided, the first ground working machine mounted on the traveling body is provided. In a work machine equipped with a work machine and a second ground work machine that can be raised and lowered on the second ground work machine, the relationship between the height of the chair on which the worker sits and the height of the second ground work machine is constant. be able to.

It is a side view of a working machine. It is a top view of the ground work apparatus. It is a side view of the ground work apparatus. 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 which shows the transmission system of the power transmitted to a rotary tiller. 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 a mounting body. It is a rear view of a rotary tiller, a ridger, and a mounting body. It is a block diagram which shows the power transmission system of a work machine. It is a front perspective view which shows a chair support and a seedling supply stand. It is a top view which shows a rotary tiller, a connecting link mechanism, and a spare seedling stand. It is a side view which shows the movement of a chair support and a transplanting machine when driving an elevating drive device. It is a rear perspective view which shows the mounting structure of an intermediate ridger. It is a plan view of the machine frame. It is a side view of the machine frame. It is a front view of the machine frame. It is a front view which shows the operation of the angle adjustment mechanism which adjusts a relative angle between a plurality of planting devices. It is a top view which shows the seedling supply device, the 1st rear chair, the 2nd rear chair and the like. It is a rear perspective view of a connecting frame and a stand. It is a rear view of a connecting frame and a stand. It is a side view of a connecting frame and a stand. It is a top view which shows a part of the power transmission system of a transplantation machine. It is a top view explaining the expansion and contraction structure of a spindle. It is sectional drawing of a spindle and a cover cylinder. It is a side view which shows a part of the power transmission system of a transplanting machine, a planting device and the like. It is a top view of the planting apparatus. It is a front perspective view which shows the angle adjustment mechanism which adjusts a relative angle between a plurality of planting devices, the position adjustment part (first position adjustment part) which adjusts the position of a soil covering device, and the like. It is a side view which shows the state that the detection member (soil cover ring) and a support frame swing up and down with respect to a machine frame. It is a top view of a detection member (soil cover ring), a support rod, and a support frame. It is a side view which shows the support frame, the 1st rocking plate, a wire and the like. It is a perspective view which shows the rear position adjustment mechanism. It is a front view which shows the state which the position of a support frame and a detection member (soil cover ring) is adjusted by a front position adjustment mechanism and a rear position adjustment mechanism. It is a side view which shows the control valve, a wire and the like. It is a side view which shows the operation of the 1st operation lever. It is a top view of the seedling supply device. It is a top view which shows the arrangement of the lid of a supply cup. It is a perspective view which shows the periphery of the 2nd open position as seen from above. It is a perspective view which shows the periphery of the 2nd open position as seen from the lower side. It is a side view which shows a feed cup, an intermediate hopper and a planting tool. It is a vertical sectional view of the 1st guide member, the 2nd guide member and the like in the 2nd open position. It is a front view which shows the 1st position adjustment mechanism. It is a side view which shows the 2nd position adjustment mechanism. It is a side view which shows the 3rd position adjustment mechanism. It is a perspective view which shows a part of a position adjustment mechanism and a support mechanism. It is a perspective view which shows the 1st front chair, a foot rest plate and the like. It is a perspective view which shows the attachment method of a foot rest plate. It is a side view of a transplant machine. It is a perspective view which shows the operation (operation) of a rotation support mechanism. It is a rear view which shows the operation (operation) of a rotation support mechanism. It is a perspective view which shows the movement of a seedling supply table. It is a perspective view which shows another movement of a seedling supply table. It is a top view which shows the replacement method of a seedling supply table. It is a front perspective view which shows the spare seedling stand and the like. It is a top view of a rotary tiller and a mulch film laying apparatus. It is a side view at the substantially center in the machine width direction of a rotary tiller and a mulch film laying device. It is a top view of the left part of a rotary tiller and a mulch film laying device. It is a side view of the left part of a rotary tiller and a mulch film laying device. It is a rear view around the left part of the 1st film roll. It is a top view in the substantially center in the machine width direction of a rotary tiller and a multi-film laying device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
FIG. 1 shows a working machine 1 capable of planting (transplanting) seedlings together with ground work (cultivation, etc.) while traveling. The working machine 1 has a traveling body 1A and a ground working device 1B mounted on the rear portion of the traveling body 1A. The ground work device 1B includes a first ground work machine 2 mounted on the rear portion of the traveling body 1A so as to be able to move up and down, and a second ground work machine 3 mounted on the rear portion of the first ground work machine 2 so as to be liftable. ing.

In this embodiment, a tractor which is a traveling vehicle is exemplified as a traveling body 1A. Further, a rotary tiller is exemplified as the first ground work machine 2. Further, as the second ground working machine 3, a transplanting machine for planting seedlings in a field is exemplified. Hereinafter, the traveling body is referred to as a tractor 1A, the first ground working machine is referred to as a rotary tiller 2, and the second ground working machine is referred to as a transplanting machine 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 cultivator, and may be any machine that works on the field. Further, although the rotary cultivator 2 exemplifies 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 of FIG. 1) of the driver seated in the driver's seat 5 of the tractor 1A is the front, the rear side of the driver (right side of FIG. 1) is the rear, and the left side of the driver (FIG. 1). The front side of 1) will be described as the left side, and the right side of the driver (the back side of FIG. 1) will be described as the right side. Further, the horizontal direction K2 (see FIG. 2), which is a direction orthogonal to the front-rear direction K1 (see FIG. 1) of the tractor 1A, will be described as the machine width direction K2.

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

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

The power transmission case T1 is configured by directly connecting a clutch housing having a built-in clutch, a transmission case having a built-in transmission, a differential case having a built-in differential device, and the like.
A driver's seat 5 is mounted on the rear portion of the vehicle body 6, and a power take-out shaft (so-called PTO shaft) 22 for taking out the power of the prime mover E1 is mounted in a rear protruding shape. That is, the traveling body 1A has a power take-out shaft 22 that takes out the power of the prime mover E1. A steering wheel 8 is provided in front of the driver's seat 5. Further, the tractor 1A has a battery (not shown) mounted on the front portion.

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

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

As shown in FIGS. 5, 6 and 8, the rotary tiller 2 has a rotary machine frame 11. The rotary machine frame 11 includes a transmission case 12, a front support frame 13F, a rear support frame 13R, a left side frame 15L, and a right side frame 15R. The transmission case 12 is located at the center of the rotary tiller 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 so as to extend in the machine width direction K2. The front support frame 13F and the rear support frame 13R are connected to the transmission case 12. The left side frame 15L connects the left ends of the front support frame 13F and the rear support frame 13R to each other. The right side frame 15R connects the front support frame 13F and the right ends of the rear support frame 13R to each other. A mounting frame 14 to which the three-point link mechanism 9 is connected is attached to the rotary machine frame 11.

As shown in FIG. 6, the mounting frame 14 has forward extending portions 34L and 34R extending forward from the front support frame 13F. The lower link 9B of the three-point link mechanism 9 is connected to the forward extending portions 34L and 34R. The front portion of the extending member 35L, 35R extending rearward from the upper portion is attached to the upper portion of the front extending portion 34L, 34R. The rear portions of the extension members 35L and 35R are attached to the upper part of the rear support frame 13R.

As shown in FIGS. 5 to 7, at the lower part of the transmission case 12, a rotating shaft 16 having an axial center in the machine width direction K2 is provided in a protruding shape on one side and the other side of the machine width direction K2. A large number of tilling claws 17 are fixed to the outer periphery of the rotating shaft 16 via brackets. When the rotating shaft 16 rotates around the axis in the direction of the arrow X1 in FIG. 5, the tilling claw 17 cultivates (cultivates) the field and discharges the cultivated soil to the rear rear cover 19B. The rotating shaft 16 and the tilling claw 17 constitute a tilling portion 18 for tilling the field.

As shown in FIGS. 5, 6 and 8, the tillage portion 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 tillage portion 18 is covered with the upper cover 19A. The rear part of the tillage portion 18 is covered with the rear cover 19B. The upper end of the rear cover 19B is rotatably pivotally supported around the axis in the machine width direction K2 via the pivot 19D on the rotary machine frame 11 and can swing up and down. The rear cover 19B is urged downward by the repression device 20. The repression device 20 is a device that urges the rear cover 19B downward by the force of a spring. The rear cover 19B forms the upper surface of the ridge formed by the ridge stand 51 described later.

The side of the tillage portion 18 is covered with the side cover 19C. The side cover 19C has a first side cover 19CL and a second side cover 19CR. The first side cover 19CL is arranged on one side (left side) of the rotary tiller 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 tiller 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 has an upper cover 19C1, a lower cover 19C2, a front cover 19C3, and a support cover 19C4. The upper cover 19C1 covers the lateral upper part of the tillage portion 18. The lower cover 19C2 covers the lateral lower part of the tillage portion 18. The upper cover 19C1 is attached to the left side frame 15L. The lower cover 19C2 is connected to the upper cover 19C1 via a connecting 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 has a side plate 19Cs, an upper plate 19Cu, and a lower plate 19Cd. The side plates 19Cs are attached to the surface of the left side frame 15L on the outer side of the machine width. The upper plate 19Cu and the lower plate 19Cd extend outward from the side plate 19Cs. 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 has a first side member 196A, a second side member 196B, and an intermediate member 196C. The first side member 196A is arranged on the left side of the rotary tiller 2 and is attached to the support cover 19C4 on the left side. The second side member 196B is arranged on the right side of the rotary tiller 2 and is attached to the support cover 19C4 on the right side. The first side member 196A and the second side member 196B extend rearward from the front end portion of the rotary tiller 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 in 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, a 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) expands from the front to the rear in a plan view. As shown in FIGS. 8 and 10, the ridger 51 includes side ridgers 51L, 51R and an intermediate ridger 51M. The side ridges 51L and 51R include a first side ridge 51L and a second side ridge 51R. Therefore, two ridges are formed by forming grooves in the soil cultivated by the rotary tiller 2 with three ridgers (first side ridger 51L, intermediate ridger 51M, second side ridger 51R). Can be formed. The upper surface of the ridge is formed by the rear cover 19B. In addition, 3 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) of the rotary cultivator 2 in the width direction. The intermediate ridger 51M is arranged at the center of the rotary tiller 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 of the right ridge of the two ridges. The intermediate ridge stand 51M forms a right side surface of the left ridge and a left side surface of the right ridge.

The first side ridger 51L has mounting portions 51La, 51Lb to be attached to the rotary tiller 2. The mounting portions 51La and 51Lb include a front mounting portion 51La provided at the front portion of the first side ridger 51L and a rear mounting portion 51Lb provided at the 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 provided. It is attached to the first side cover 19CL via. The front portion of the front mounting body 52 is mounted on the outer surface (the surface on the outer side of the machine width) of the first side cover 19CL. The front mounting body 52 is bent so as to shift outward from the machine width toward the rear. The front mounting portion 51La of the first side ridger 51L is mounted on the rear portion of the front mounting body 52. The vertical position of the front mounting portion 51La with respect to the front mounting body 52 can be adjusted.

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

Since 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 explanation is omitted.
As shown in FIG. 6, the outer end portion (the end portion on the outer side of the machine width) in the width direction of the rotary cultivator 2 of the side ridges 51L and 51R is the width of the rotary cultivator 2 of the side cover 19C. It is located outside the outer end in the direction (the outer end of the machine width). Specifically, the left end portion of the first side ridger 51L is located to the left of the left end portion 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 mounting portion 51Ma of the intermediate ridger 51M is mounted on the lower part of the transmission case 12 via the intermediate mounting body 54. The front end of the intermediate mounting body 54 is attached to the front lower portion of the transmission case 12, and the rear end is attached to the front mounting portion 51Ma of the intermediate ridger 51M. The intermediate mounting body 54 has a length adjusting portion 54a whose length can be adjusted 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 mounting portion 51Ma with respect to the transmission case 42 can be adjusted.

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

As shown in FIGS. 5, 6, 8 and 9, soil gathering discs 56L and 56R are arranged in front of the rotary cultivator 2. The soil gathering discs 56L and 56R are members for pulling soil inward toward the tillage portion 18. The soil gathering disk 56L is arranged on one side (left side) in the machine width direction, and is located on the left front side of the rotary tiller 2. The soil gathering disk 56R is arranged on the other side (right side) in the machine width direction, and is located on the right front side of the rotary tiller 2. The soil gathering discs 56L and 56R are arranged diagonally so as to shift from the outside of the machine width to the inside of the machine width from the front to the rear in a plan view. The earth gathering discs 56L and 56R are attached to the front support frame 13F of the rotary machine frame 11 via a disc mounting body 57 and a bracket (not shown). The length of the disc mounting body 57 can be adjusted by moving the lower member 57b in and out of the upper member 57a. By adjusting the length of the disc mounting body 57, the heights of the soil gathering discs 56L and 56R can be adjusted.

As shown in FIGS. 5 and 7, an input shaft (so-called PIC shaft) 21 for taking power into the rotary tiller 2 is provided in the front portion of the upper part of the transmission case 12. As shown in FIG. 1, the input shaft 21 is interlocked and connected to the power take-out shaft 22 by a joint (universal joint) J1. Therefore, power is transmitted from the power take-out shaft 22 to the input shaft 21 via the joint J1. In other words, power is transmitted from the power take-out shaft 22 to the rotary tiller (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 the second gear (bevel gear) G2. The second gear G2 is provided on the first transmission shaft S1 having an axial center in the machine width direction K2. A third gear (spur gear) G3 is provided on the first transmission shaft S1. The third gear G3 meshes with a fourth gear (spur gear) G4 located below the third gear G3. The fourth gear G4 meshes with the fifth gear (spur gear) G5 located below the fourth gear G4. The fifth gear G5 is provided on the rotating shaft 16. Therefore, the power transmitted to the input shaft 21 is transmitted to the rotating shaft 16 via the first to fifth gears G1 to G5, and the rotating shaft 16 rotates in the direction of the arrow X1 in FIG.

As shown in FIG. 6, the first transmission shaft S1 extends from substantially the center in the width direction of the rotary tiller 2 toward one side (left side) outside the width of the rotary tiller 2. A first sprocket SP1 is provided at one end (left end) on the outer side of the machine width of the first transmission shaft S1. A second transmission shaft S2 extending in the machine width direction is provided in front of the first transmission shaft S1. A second sprocket SP2 is provided on the second transmission shaft S2. A chain 26 is hung on the first sprocket SP1 and the second sprocket SP2. As a result, the power transmitted to the first transmission shaft S1 is transmitted to the second transmission shaft S2.

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. By measuring the rotation speed of the second transmission shaft S2, the rotation speed of the prime mover E1 can be calculated.
As shown in FIG. 11, in the vicinity of the sixth gear G6, a pulse sensor 25 that outputs a pulse-shaped signal (generates a pulse) by detecting the unevenness of the sixth gear G6 is provided. As the pulse sensor 25, for example, a magnetoresistive element type rotation sensor is adopted. The pulse sensor 25 is connected to a control device (not shown), and the generated pulse is input to the control device. The control device measures the rotation speed of the second transmission shaft S2 (performing signal processing) based on the signal from the pulse sensor 25. 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. It is also possible to detect the position (upper limit position) of the planting tool 64. The control device is configured by using a microcomputer equipped with a CPU, EEPROM, and the like. The control device is connected to, for example, the battery of the tractor 1A, and 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 transplanting machine 3 via the power transmission system shown in FIG. 11, and the transplanting machine 3 is driven (specifically, equipped in the transplanting machine 3). The planting tool 64 and the seedling supply devices 38A and 38B, which will be described later, are driven).

The electromagnetic clutch 24 is connected to the above-mentioned control device and is controlled by the control device. The electromagnetic clutch 24 is disengaged by the clutch disengagement signal from the control device, and then is connected by the clutch connection signal from the control device. That is, the electromagnetic clutch 24 is disengaged for a required time by a command signal from the control device. In some cases, the transplanting machine 3 is continuously driven without disconnecting the electromagnetic clutch 24 (without stopping the driving of the planting tool 64 and the seedling supply devices 38A and 38B).

Next, with reference to FIG. 11, the power transmission system from the third transmission shaft S3 to the transplanting machine 3 will be described.
A worm 30 is provided on the third transmission shaft S3, and the worm 30 meshes with the worm wheel 31. The worm wheel 31 is provided on the fourth transmission shaft S4. The fourth transmission shaft S4 is connected to the output shaft 32 via the brake 27. The power transmitted to the third transmission shaft S3 is transmitted to the output shaft 32 via the worm 30, the worm wheel 31, the fourth transmission shaft S4, and the brake 27. Therefore, the power from the prime mover E1 is transmitted from the output shaft 32 to the transplanting machine 3 via the worm 30 and the like.

By transmitting the power from the prime mover E1 to the transplanting machine 3 via the worm 30, the self-locking function of the worm (a state in which the worm cannot be turned from the worm wheel) makes the planting tool 64 shakuri (planting tool). It is possible to prevent the occurrence of (the 64 stops before the stop position (top dead center position) and reverses). Further, even if the electromagnetic clutch 24 is disengaged before the top dead center due to the urging force of the spring, the brake 27 reverses (descends) the planting tool 64 without coasting to the top dead center. To prevent.

As shown in FIG. 6, the worm 30 and the worm wheel 31 are built in the casing 28 provided in the upper left portion of the rotary tiller 2. Further, on the right side of the casing 28, a cover 29 that covers the electromagnetic clutch 24, the sixth gear (pulse detection gear) G6, and the pulse sensor 25 is provided.
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 tiller 2 in the width direction (machine width direction K2). As a result, the operator can easily access and adjust the brake 27, the sixth gear (pulse detection gear) G6, the pulse sensor 25, and the electromagnetic clutch 24 from the side of the rotary tiller 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 tiller 2. As shown in FIG. 11, a power branching mechanism 35 including a chain transmission mechanism or the like is provided in the middle of the output shaft 32 toward the front. A part of the rotational power of the output shaft 32 is branched by the power branch 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 portion of the rotary tiller 2, and is an irrigation tube (illustrated) arranged in the vicinity of the planting tool from the water tank mounted on the traveling body 1A or the like. Send water to (omitted).

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

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

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

Hereinafter, the first machine frame 37A and the second machine frame 37B are collectively referred to as a machine frame 37. Further, the first seedling supply device 38A and the second seedling supply device 38B are collectively referred to as a seedling supply device 38. Further, the first planting device 39A and the second planting device 39B are 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 seedlings supplied from the seedling supply device 38 in a field, and is a planting tool that moves up and down by the power of the prime mover E1, holds and descends the seedlings, and rushes into the field to plant seedlings. Has 64. The soil covering device 40 is a device for covering the root portion of the planted seedlings with soil and suppressing the root portion of the seedlings.

As shown in FIG. 11, the plurality of first planting devices 39A include a first planting device 39AL on the left and a first planting device 39AR on the right. The plurality of first soil covering devices 40A include a left first soil covering device 40AL corresponding to the first planting device 39AL and a first soil covering device 40AR corresponding to the first planting device 39AR. Further, the plurality of second planting devices 39B include a second planting device 39BL on the left and a second planting device 39BR on the right. The plurality of second soil covering devices 40B include a left second soil covering device 40BL corresponding to the second planting device 39BL and a second soil covering device 40BR corresponding to the second planting device 39BR.

The number of transplant units may be three or more. Further, although it is preferable that a plurality of transplant units are provided, one transplant unit may be provided. That is, the transplanting machine 3 may have at least one transplanting unit. Therefore, the transplanting machine 3 may have at least one seedling supply device. Further, at least one planting device may be provided for one transplanting unit. That is, the transplanting machine 3 may have at least one planting device (planting tool).

As shown in FIGS. 2 and 3, the transplanting machine 3 is connected to the rear portion of the rotary tiller 2 so as to be able to move up and down via a working machine connecting mechanism 41. Further, the transplanting machine 3 is driven up and down by the elevating drive device 42.
As shown in FIG. 13, the working machine connecting mechanism 41 has a toolbar 43 to which the transplanting machine 3 is attached, and a connecting link mechanism 44 for connecting the toolbar 43 to the rotary tiller 2 so as to be able to move up and down.

The toolbar 43 is formed by a square pipe and is provided behind the rear support frame 13R so as to extend in the machine width direction K2. The transplant machine 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 transplant unit 36A and the second transplant unit 36B are attached to the toolbar 43 so as to be adjustable in position in the machine width direction K2.

As shown in FIG. 12 and the like, the chair support 150 is connected to the toolbar 43. The chair support 150 supports the chairs (first front chair 187A and second front chair 187B) on which the worker working on the transplanting machine 3 sits. The chair support 150 is arranged between the rotary tiller 2 and the transplanter 3. The chair support 150 has a first support 151, a second support 152, a connecting body 153, and a position adjusting mechanism 230.

The first support 151 has a front support member 151a, a rear support member 151b, and a connecting 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 parallel with each other in the machine width direction K2. The connecting support member 151c extends in the front-rear direction, and connects the front support member 151a and the rear support member 151b. The connecting support member 151c includes a plurality of (six) connecting support members 151c. The plurality of connecting support members 151c are arranged in parallel with each other at intervals in the machine width direction. Of the plurality of connecting support members 151c, the two connecting support members 151c1 and the connecting support members 151c2 arranged so as to sandwich the center in the machine width direction are attached with pillar members 155L and 155R extending upward, respectively. .. A support shaft 156 extending in the machine width direction is attached to the upper part of the pillar material 155L and the upper part of the pillar material 155R.

The second support 152 has vertical support members 157L and 157R and horizontal support members 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 adjusting mechanism 230 is attached to the second support 152, and chairs (first front chair 187A and second front chair 187B) are supported via the position adjusting mechanism 230. The configuration of the position adjusting mechanism 230 will be described later.
The connecting body 153 has a first connecting material 153L1, 153R1 and a second connecting material 153L2, 153R2. The first connecting materials 153L1, 153R1 extend in the front-rear direction. The first connecting material 153L1 connects the left portion of the toolbar 43 and the vertical support material 157L. The first connecting material 153R1 connects the right portion of the toolbar 43 and the vertical support material 157R. At the rear of the first connecting member 153L1, a support shaft 159L projecting to the left is provided. A support shaft 159R projecting to the right is provided at the rear portion of the first connecting member 153R1. The second connecting materials 153L2 and 153R2 extend in the vertical direction. The second connecting material 153L2 connects the left end portion of the rear support member 151b and the front portion of the first connecting material 153L1. The second connecting material 153R2 connects the right end portion of the rear support member 151b and the front portion of the first connecting material 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 connecting link mechanism 44 is composed of a parallel link mechanism.
The first lower link 44A and the second lower link 44B are arranged in parallel with each other 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 middle portion in the front-rear direction of the first lower link 44A and the middle portion in the front-rear direction of the second lower link 44B.

The first lower link 44A connects the chair support 150 and the rotary tiller 2 on one end side (left side) of the toolbar 43 in the length direction (machine width direction K2). The second lower link 44B connects the chair support 150 and the rotary tiller 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 via a support shaft 161L on a left bracket 160L (see FIG. 13) fixed to the left portion of the rear support frame 13R of the rotary tiller 2. .. The rear end 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 via a support shaft 161R on a right bracket 160R (see FIG. 13) fixed to the right portion of the rear support frame 13R of the rotary tiller 2. The rear end of the second lower link 44B is pivotally supported by a 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 tiller 2 at the central portion of the toolbar 43 in the length direction (machine width direction K2). Specifically, the front end of the upper link 44C is pivotally supported via a support shaft 161M on a central bracket 160M (see FIG. 13) fixed to the upper part of the transmission case 12 of the rotary tiller 2. The rear end of the upper link 44C is pivotally supported by a support shaft 156 of the chair support 150.

In the working machine connecting 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 driving the elevating drive device 42, the upper link 44C moves up and down around the support shaft 161M. Swing to. As a result, the chairs (first front chair 187A and second front chair 187B) supported by the chair support 150 and the transplanting machine 3 are integrally raised and lowered. Here, since the connecting link mechanism 44 is composed of the parallel link mechanism, the chairs 187A and 187B and the transplanting machine 3 move up and down in parallel with the ground.

As shown in FIGS. 13 and 14, the elevating drive device 42 has an elevating cylinder (hydraulic actuator) C1. The elevating cylinder C1 is composed of a hydraulic cylinder having a cylinder body C1a and a piston rod C1b. The tip of the piston rod C1b is pivotally supported by the upper support shaft 162. The upper support shaft 162 is attached to the 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 mounting member 164. The front portion of the shaft mounting member 164 is mounted on the upper portion of the rear support frame 13R of the rotary machine frame 11, and the rear portion is mounted on the 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 (first front chair 187A and second front chair 187B) and the transplanting machine 3 (machine frame 37) are raised. Further, when the elevating cylinder C1 is shortened (the piston rod C1b is retracted), the upper link 44C and the lower links 44A and 44B swing downward, and the chair supported by the chair support 150 (first front chair 187A and). The second front chair 187B) and the transplanting machine 3 (machine frame 37) are lowered.

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

The elevating drive device 42 may be composed of an electric cylinder (electric actuator) or an electric hydraulic cylinder (electric hydraulic actuator). The electric cylinder is an electrically driven cylinder, for example, a cylinder in which a ball screw is rotated around an axis by an electric motor to move a ball screw nut, and the movement of the ball screw nut moves the rod forward and backward. The electro-hydraulic cylinder is, for example, an actuator that integrates an electric motor, an oil tank, a hydraulic pump, a valve, a hydraulic cylinder, etc., and the hydraulic pump rotates by the rotation of the electric motor and the valve is switched to operate the hydraulic cylinder. It is a cylinder.

Next, the machine frame 37 of the transplanting machine 3 will be described with reference to FIGS. 16 to 18.
Since the first machine frame 37A and the second machine frame 37B have the same configuration, only the first machine frame 37A will be described, and the description of the second machine frame 37B will be omitted.
The machine frame 37 has a main frame 65 and a connecting bracket 61. The seedling supply device 38A, the planting device 39A, the soil covering device 40A, etc. are mounted on the main frame 65 of the first machine frame 37A, and the seedling supply device 38B, the planting device 39B, and the soil covering device are mounted on the main frame 65 of the second machine frame 37B. 40B etc. are installed.

The connecting bracket 61 is a member that connects the main frame 65 to the toolbar 43. The connecting bracket 61 has a mounting wall 61a that movably abuts on the upper surface of the toolbar 43 in the machine width direction K2, a side wall 61b extending upward from the left end of the mounting wall 61a, and upward from the right end of the mounting wall 61a. It has an extended other side wall 61c. The mounting wall 61a is fixed to the toolbar 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 can be moved in the machine width direction K2 along the toolbar 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”). ) 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 toolbar 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 transplant unit 36A and the second transplant unit 36B can be moved along the toolbar 43, the distance between the first transplant unit 36A and the second transplant unit 36B can be adjusted.

That is, the transplanting machine 3 is provided with an adjusting mechanism for adjusting the distance between the first transplanting unit 36A and the second transplanting unit 36B. Hereinafter, for convenience of explanation, this adjustment mechanism is referred to as a "distance adjustment 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 materials (first frame material 65a to 19th frame material 65t) formed of square pipes. The first frame material 65a constitutes the upper left portion of the main frame 65, and is arranged so as to extend in the front-rear direction K1. The second frame material 65b constitutes the upper right portion of the main frame 65, and is arranged so as to extend in the front-rear direction K1. The third frame material 65c connects the front portions of the first frame material 65a and the second frame material 65b to each other. The fourth frame material 65d and the fifth frame material 65e connect the rear portions of the first frame material 65a and the second frame material 65b to each other. The fourth frame material 65d is located in front of the fifth frame material 65e. The sixth frame material 65f is arranged above the main frame 65 and at a substantially central portion in the machine width direction K2.

The sixth frame material 65f and the seventh frame material 65g are arranged so as to extend in the front-rear direction K1. The sixth frame material 65f is located above the main frame 65. The seventh frame material 65 g is located at the lower part of the main frame 65. The eighth frame material 65h connects the central portion of the third frame material 65c in the machine width direction K2 and the front end portion of the seventh frame material 65g. The 19th frame material 65t connects the second frame material 65b and the sixth frame material 65f. The 19th frame material 65t is arranged behind the 3rd frame material 65c and in front of the 4th frame material 65d. The ninth frame material 65i connects the 19th frame material 65t and the seventh frame material 65g. The tenth frame material 65j connects the fourth frame material 65d and the seventh frame material 65g. The ninth frame material 65i is located in front of the tenth frame material 65j.

The eleventh frame material 65k is located between the first frame material 65a and the sixth frame material 65f, and extends downward from the third frame material 65c. The twelfth frame material 65m is located between the second frame material 65b and the sixth frame material 65f, and extends downward from the third frame material 65c. A connecting bracket 61 is arranged between the 11th frame material 65k and the 12th frame material 65m. One side wall 61b of the connecting bracket 61 is fixed to the 11th frame material 65k, and the other side wall 61c is fixed to the 12th frame material 65m.

The thirteenth frame material 65n extends downward from a portion closer to the rear of the first frame material 65a. The thirteenth frame material 65n is arranged in parallel with the tenth frame material 65j. The 14th frame material 65o extends downward from the rear end portion of the first frame material 65a. The fifteenth frame material 65p extends downward from a portion closer to the rear of the second frame material 65b. The 15th frame material 65p is arranged in parallel with the 9th frame material 65i. The 16th frame material 65q extends downward from the rear end portion of the 2nd frame material 65b. The 17th frame material 65r connects the lower ends of the 14th frame material 65o and the 16th frame material 65q to each other. The 18th frame material 65s extends upward from the front portion of the 7th frame material 65g.

The first mounting plate 65u is fixed over the lower part of the 11th frame material 65k and the lower part of the 12th frame material 65m. A front plate 78La provided at the front of the first planting frame 78L is bolted to the left portion of the first mounting plate 65u. A front plate 78Ra provided at the front of the second planting frame 78R is bolted to the right portion of the first mounting plate 65u. The first planting device 39AL is mounted on the first planting frame 78L. The first planting device 39AR is mounted on the second planting frame 78R.

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

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

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

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

By moving the bolt B3 inserted through the adjusting groove 66R along the adjusting groove 66R and changing the adjusting hole 67R through which the bolt B4 is inserted among the plurality of adjusting holes 67R, the first mounting plate 65u The mounting angle of the second planting frame 78R can be changed with respect to (see the virtual line and the bidirectional arrow on the right side of FIG. 18). Thereby, the mounting angle of the first planting device 39AR with respect to the first mounting plate 65u can be changed. In other words, the tilt angle of the first planting device 39AR with respect to the vertical line can be changed.

As described above, the relative angle between the first planting device 39AL and the first planting device 39AR can be adjusted by using the adjusting grooves 66L, 66R and the adjusting holes 67L, 67R. That is, the adjusting grooves 66L, 66R and the adjusting holes 67L, 67R are angle adjusting mechanisms (1st planting device 39AL and 1st planting device 39AR) that can adjust the relative angle between the plurality of first planting devices (first planting device 39AL). Hereinafter, it constitutes a "first angle adjusting mechanism"). The first angle adjusting mechanism can individually adjust the mounting angles of the plurality of first planting devices (first planting device 39AL and first planting device 39AR) with respect to the first machine frame 37A.

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

According to the first angle adjusting mechanism, the distance (interval) between the seedling planting position by the first planting device 39AL and the seedling planting position by the first planting device 39AR can be adjusted. According to the second angle adjusting mechanism, the distance (interval) between the seedling planting position by the second planting device 39BL and the seedling planting position by the second planting device 39BR can be adjusted.
Even if the first planting frame 78L and the second planting frame 78R are mounted so as to be position-adjustable in the machine width direction K2 with respect to the machine frame 37 (first machine frame 37A, second machine frame 37B). good.

As shown in FIGS. 16 to 18, the second mounting plate 65v is fixed over the lower part of the 10th frame material 65j and the lower part of the 13th frame material 65n. The third mounting plate 65w is fixed over the lower part of the ninth frame material 65i and the lower part of the fifteenth frame material 65p. The rear portion of the first soil covering device 40AL is attached to the second mounting plate 65v. The rear portion of the first soil covering device 40AR is attached to the third mounting plate 65w.

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

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

By connecting the first transplantation unit 36A and the second transplantation unit 36B by the connecting 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 depth of the seedlings planted in the first transplanting unit 36A and the seedlings planted in the second transplanting unit 36B can be made the same. In addition, it is possible to accurately adjust the space between the seedlings planted in the first transplanting unit 36A and the seedlings planted in the second transplanting unit 36B.

As shown in FIGS. 21 to 23, stands 137L and 137R are attached to the connecting frame 130. The stand 137L is attached to the left end portion 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 be changed in posture between a standing posture extending downward from the first connecting frame material 131 and a folding posture extending inward in the machine width along the first connecting frame material 131. In FIGS. 21 and 22, the folding postures of the stands 137L and 137R are shown by solid lines, and the standing postures are shown by virtual lines. FIG. 23 shows the standing postures of the stands 137L and 137R.

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

An accommodating body 166 accommodating a control valve 165 and the like is attached to the connecting frame 130. The housing 166 is attached to the upper part of the third connecting frame material 133 and the front part of the fourth connecting frame material 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 part of the accommodating body 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 power from the prime mover E1. The seventh gear G7 meshes with the eighth gear (bevel gear) G8. The eighth gear G8 is provided at one end (left end) of the spindle 107. As a result, the power from the prime mover E1 is transmitted from the output shaft 32 to the spindle 107.

As shown in FIGS. 20 and 24, the spindle 107 extends in the machine width direction K2 at right angles to the output shaft 32. As shown in FIG. 20, the spindle 107 is provided over the first machine frame 37A and the second machine frame 37B. The spindle 107 is composed of a plurality of shafts and a connecting shaft that interlocks and connects the shafts, and can be expanded and contracted in accordance with the position adjustment of the machine frames 37A and 37B in the machine width direction K2. The spindle 107 rotates by receiving power from the prime mover E1 transmitted from the output shaft 32. Power is transmitted from the main shaft 107 to the seedling supply device 38 and the planting device 39 of each of the transplanting units 36A and 36B.

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

As shown in FIGS. 24 and 25, the spindle 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 rotation shaft 107A rotates by receiving power from the prime mover E1. The second rotating shaft 107B receives power from the first rotating shaft 107A and rotates. The second rotation shaft 107B is composed of a left shaft 107B1 and a right shaft 107B2 connected by a coupling CP. The third rotating shaft 107C receives power from the second rotating shaft 107B and rotates.

An eighth gear G8 that meshes with the seventh gear G7 is provided at the left end of the first rotary shaft 107A, and the first rotary shaft 107A rotates by receiving power transmitted from the output shaft 32. The connecting shaft 107L connects the right end portion of the first rotating shaft 107A and the left end portion of the second rotating shaft 107B. The connecting shaft 107R connects the right end portion of the second rotating shaft 107B and the left end portion 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 irregularities in the circumferential direction. The connecting shafts 107L and 107R are cylindrical spline bearings in which the spline shafts mesh with each other. The first rotating shaft 107A and the second rotating shaft 107B can move in the width direction of the transplanting machine 3 (same as the machine width direction K2) with respect to the connecting shafts 107L and 107R. 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 respect to the connecting shafts 107L and 107R. As shown in FIG. 25, by moving the first rotating shaft 107A and the second rotating shaft 107B in the machine width direction K2 with respect to the connecting shafts 107L and 107R, the spindle 107 can be expanded and contracted in the machine width direction K2. That is, by sliding the spline shaft with respect to the spline bearing, the spindle 107 can be expanded and contracted in the machine width direction K2.

The outer circumference of the spindle 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. As a result, it is possible to correspond to the spindle 107 of various thicknesses. Further, the cover cylinder 110 can be opened without the overlapping portion. As a result, after the spindle 107 is mounted, the outer circumference of the spindle 107 can be covered by the cover cylinder 110.

As shown in FIG. 25, the cover cylinder 110 includes a plurality of cover cylinders (first cover cylinder 110A, second cover cylinder 110B). The plurality of cover cylinders 110A and 110B can move in the machine width direction K2 along the spindle 107. The first cover cylinder 110A covers the outer circumference of the connecting shaft 107L. The second cover cylinder 110B covers the outer circumference of the connecting shaft 117R.
By covering the outer periphery of the spindle 107 with the cover cylinder 110, the first rotary shaft 107A, the second rotary shaft 107B, the third rotary shaft 107C, and the connecting shafts 107L, 107R constituting the spindle 107 are protected from the outside. be able to. Further, since the cover cylinder 110 includes a plurality of cover cylinders 110 that can move in the machine width direction along the main shaft 107, it is possible to cope with the expansion and contraction of the main shaft 107 in the machine width direction K2.

The power transmitted to the spindle 107 (first rotating shaft 107A, second rotating shaft 107B, third rotating shaft 107C and connecting shaft 107L, 107R) is transmitted to the first transplanting unit 36A and the second transplanting unit 36B via the transmission mechanism. Is 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 first planting device 39AR on the right via the seventh transmission mechanism (chain winding transmission mechanism) 115 g, and the eighth transmission mechanism 115h, the third shaft. It is transmitted to the first planting device 39AL on the left via 113 and the ninth transmission mechanism 115i. The power transmitted to the second shaft 112 is transmitted to the second planting device 39BR on the right via the tenth transmission mechanism (chain winding transmission mechanism) 115j, and the eleventh transmission mechanism 115k, the fourth shaft 114, It is transmitted to the second planting device 39BL on the left via the 12th transmission mechanism 115m.

Next, the planting device 39 will be described.
Since the first planting device 39A and the second planting device 39B are configured in the same manner, the structure of the first planting device 39A illustrated in FIGS. 27 and 28 will be described, and the second planting device 39B will be described. The description of the structure is omitted. Further, since the first planting device 39AL on the left and the first planting device 39AR on the right are configured in the same manner except that they are configured symmetrically, the description of the common portion will be omitted.

As shown in FIGS. 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 has a planting tool 64 and a planting elevating mechanism 139. The first planting device 39AR has a planting tool 64 and a planting elevating mechanism 139, similarly to the first planting device 39AL.

Hereinafter, the planting tool 64 in the first planting device 39AL may be referred to as a planting tool 64AL, and the planting tool 64 in the first planting device 39AR may be referred to as a planting tool 64AR. Further, the planting elevating mechanism 139 in the first planting device 39AL may be referred to as a planting elevating mechanism 139AL, and the planting elevating mechanism 139 in the first planting device 39AR may be referred to as a planting elevating mechanism 139AR.
The planting tool 64 is a member for planting seedlings in a field (ridge). The planting tool 64 has a beak-like shape with its tip facing downward (see FIG. 27), and has a front component 140 and a rear structure 141. The planting tool 64 is openable and closable when the front component 140 and the rear component 141 are separated from each other and close to each other in the front-rear direction K1. The front structure 140 and the rear structure 141 are urged 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 that is supported by the first planting frame 78R via a support shaft 118R, and a drive sprocket. It has a chain 119R wound over an 116R and a driven sprocket 117R. Power is transmitted from the first shaft 111 to the support shaft 118R by the seventh transmission mechanism 115 g, and the support shaft 118R rotates.

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

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

As shown in FIGS. 27 and 28, the planting elevating mechanism 139 is a device that supports the planting tool 64 and raises and lowers the planting tool 64. Specifically, the planting elevating mechanism 139AL is a device for raising and lowering the planting tool 64AL, and the planting elevating mechanism 139AR is a device for raising and lowering the planting tool 64AR.
The planting elevating mechanism 139 has a first case 120, a second case 121, and a mounting member 122. The first case 120 of the planting elevating mechanism 139L is rotatably supported by the first planting frame 78L via a support shaft 118L. The first case 120 of the planting elevating mechanism 139R is rotatably supported by the second planting frame 78R via the support shaft 118R. The second case 121 is rotatably supported on the free end side of the first case 120. The mounting member 122 is supported by the second case 121. The planting tool 64 is supported by the mounting member 122.

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

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

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

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

Next, the soil covering device 40 will be described.
Since the structures of the first soil covering device 40A and the second soil covering device 40B are configured in the same manner, the first soil covering device 40A will be described and the description of the structure of the second soil covering device 40B will be omitted.
Further, since the configurations of the first soil covering device 40AL and the first soil covering device 40AR are similarly configured, 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 for supporting the soil covering devices 81L, 81R. Have. In the case of the present embodiment, since the soil covering devices 81L and 81R are soil covering rings, the soil covering devices 81L and 81R are hereinafter referred to as soil covering rings 81L. It will be described as 81R.
The soil-covered ring 81L and the soil-covered ring 81R rotate in contact with the upper surface (ground) of the field behind the planting tool 64, and bring the soil to the root portion of the planted seedling to cover the soil and suppress the root portion of the seedling.

The soil-covered ring 81L and the soil-covered ring 81R can move up and down independently, and move up and down following the unevenness of the field. When the planting device 39 is position-adjustable in the machine width direction K2, the soil covering device 40 is configured to be position-adjustable in the machine width direction K2 correspondingly.
The soil-covered ring 81L and the soil-covered ring 81R function as a detection member 83 for detecting the height of the machine frame 37 with respect to the ground. The ground height of the machine frame 37 is the relative height of the lower end of the machine frame 37 with respect to the planting surface on which the seedlings are planted. The planting surface is a field surface prepared by the rear cover 19B of the rotary tiller 2. When ridges are formed in the field, the planting surface is the upper surface of the ridges.

The detection member 83 (soil-covered ring 81L and soil-covered ring 81R) is attached to the rear portion of the support frame 82 that is vertically swingably supported by the machine frame 37. The support frame 82 supports the detection member 83 so as to be vertically movable with respect to the machine frame 37. The support frame 82 is provided with a cylindrical boss 84 having an axial center in the machine width direction K2 at the front portion. The boss 84 is supported by a support rod 85 provided on the machine frame 37. The support rod 85 has an axial center extending in the machine width direction K2, and is supported by a support member 86 extending downward from the seventh frame member 65 g via a bearing. The support rod 85 can rotate around the axis extending in the machine width direction K2. The boss 84 is fitted on the outer periphery of the support rod 85, and can rotate around the axis together with the support rod 85. The boss 84 is fitted so as to be movable in the machine width direction K2 with respect to the support rod 85. As a result, the support frame 82 can swing up and down, and its position can be adjusted in the machine width direction K2. The detection member 83 can move up and down by swinging the support frame 82 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 fixtures (pins) 87 are inserted into the through holes 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. Then, 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. Can be done. 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 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 (soil covering ring 81L and soil covering ring 81R). The support frame 82 has a left rear portion 82a arranged above the soil covering ring 81L and extending in the front-rear direction, and a right rear portion 82b arranged above the soil covering ring 81R and extending in the front-rear direction. A soil covering ring 81L is attached to the left rear portion 82a via a mounting plate 88L. A soil covering ring 81R is attached to the right rear portion 82b via a mounting plate 88R.

Further, the support frame 82 has a connecting portion 82c connecting the rear portion of the left posterior portion 88a and the posterior portion of the right posterior portion 88b, and a front portion 82d extending forward from the left posterior portion 88a.
A rod member 90 is attached to the connecting portion 82c via the attachment stays 89U and 89D. The mounting stay 89U is mounted on the lower part of the rod member 90. The mounting stay 89D is mounted on the connecting portion 82c. A lower shaft 91 extending in the machine width direction K2 is attached to the mounting stays 89U and 89D. The lower portion of the rod member 90 is rotatably supported 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 can rotate around the axis in the machine width direction. The rod member 90 tilts and moves up and down with the vertical movement of the detection member 83.

As shown in FIGS. 33 and 34, the second mounting plate 65v provided in 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 mounting plate 65v by a bolt B5 inserted through the through hole 68. By changing (shifting) the position of the through hole 68 through which the bolt B5 is inserted in the machine width direction K2, the position of the shaft support member 93 with respect to the second mounting plate 65v can be changed in the machine width direction. As a result, as shown by a virtual line in FIG. 34, the positions of the rear portions of the rod member 90 and the support frame 82 can be adjusted in the machine width direction K2. 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 section (first position adjusting section) for adjusting the position of the first soil covering device 40A in the machine width direction K2. That is, the porting machine 3 has an adjusting unit (first position adjusting unit) for adjusting the position of the first soil covering device 40A in the machine width direction. Further, the porting machine 3 has an adjusting unit (second position adjusting unit) for adjusting the position of the second soil covering device 40B in the machine width direction. Since the configuration of the second position adjusting unit is the same as the configuration of the first position adjusting unit, the description thereof will be omitted.

As shown in FIG. 33 and the like, a weight 94 is mounted on the mounting stay 89U. The rod member 90 penetrates the weight 94. The weight 94 touches the detection member 83 (soil covering rings 81L, 81R) to the ground by pushing the rear portion (connecting portion 82c) of the support frame 82 downward.
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 mounting plate 95. As a result, the support rod 85 rotates about the axis as the support frame 82 swings up and down. A first rocking plate 96 is attached to the support rod 85. The rear portion of the first rocking plate 96 is fixed to the support rod 85, and the front portion of the first rocking plate 96 swings up and down as the support rod 85 rotates (see FIG. 30).

As shown in FIG. 32, one end (lower end) of the wire (cable) 97 is connected to the front portion of the first rocking plate 96. The wire 97 has an outer shell body 98 covering an intermediate portion excluding one end and the other end, and can move (advance and retreat) along the outer shell 98. One end (lower end) of the outer shell body 98 is fixed to the front projecting member 99 projecting forward from the support member 240. One end of the wire 97 projects from one end of the outer shell 98 and is connected to the front of the first rocking plate 96.

The first rocking plate 96 to which the wire 97 is connected may be provided only on either the support rod 85 that supports the first soil covering device 40A or the support rod 85 that supports the second soil covering device 40B. .. That is, only one wire 97 is sufficient regardless of the number of soil covering devices.
As shown in FIG. 35, the other end (upper end) of the outer shell body 98 is fixed to the second rocking plate 100 housed in the housing body 166. The second rocking plate 100 is connected to the lower end of the first operating lever 167. The first operating lever 167 projects upward from the groove 166a (see FIG. 21) formed in the upper part of the housing body 166, and can swing in the front-rear direction along the groove 166a. The first operating 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 rocking 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 protrudes from the other end of the outer shell 98 and is connected to the swing piece 165a of the control valve 165 housed in the housing 166. .. The swing piece 165a is connected to the spool of the control valve 165. Along 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 the rod side of the cylinder body C1a, and the elevating cylinder C1 expands or shortens.

When the detection member 83 (soil covering ring 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 about the axis in the machine width direction. As a result, the front portion of the first rocking plate 96 moves up and down, and the wire 97 moves upward or downward. The control valve 165 switches the elevating drive device 42 between the first state in which the machine frame 37 is raised and the second state in which the machine frame 37 is lowered as the wire 97 moves. Specifically, when the detection member 83 moves upward, the wire 97 moves upward, the control valve 165 shortens the elevating cylinder C1 of the elevating drive device 42, and the machine frame 37 (transplanting machine 3) rises. When the detection member 83 moves downward, the wire 97 moves downward, the control valve 165 extends the elevating cylinder C1 of the elevating drive device 42, and the machine frame 37 (transplanting machine 3) descends. This makes it possible to prevent variations in the planting depth of seedlings due to the unevenness of the field.

Further, as shown by a virtual line in FIG. 36, the second rocking plate 100 swings in the vertical direction by swinging the first operating lever 167 in the front-rear direction. With the swing of the second rocking plate 100, the position of the other end of the outer shell body 98 fixed to the second rocking 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 operating lever 167, the planting depth (relationship between the height of the detection member 83 and the planting depth) based on the detection result by the detection member 83 can be changed.

More specifically, the planting depth is set in advance according to the detection result (height of the detection member 83) by the detection member 83, and the detection result by 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 for the movement of the wire 197 (the 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 the 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 rocking plate 169 is attached to the lower end of the second operating lever 168. The third rocking plate 169 is connected to the spool of the control valve 165 via a wire 170. The control valve 165 is also operated by swinging the second operation lever 168 in the front-rear direction to move the elevating drive device 42 into the first state of raising the machine frame 37 and the second state of lowering the machine frame 37. You can switch.

The elevating control of the transplanting machine 3 according to the unevenness of the field is performed independently of the rotary tiller 2 mounted on the rear part of the tractor 1A. This makes it possible to improve the planting accuracy of seedlings.
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 a planting tool 64 located below the seedling supply device 38.
Since the first seedling supply device 38A and the second seedling supply device 38B have the same configuration, the structure of the first seedling supply device 38A will be illustrated and described with reference to FIGS. 37 to 42, and the second seedling supply device 38B will be illustrated. The explanation of 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 frame 37B.
As shown in FIGS. 20 and 37, the seedling supply device 38 has a large number of supply cups 171 and 172 into which seedlings are charged. The large number of supply cups includes a large number of first supply cups 171 and a large number of second supply cups 172. In the case of the present embodiment, there are 11 first supply cups 171 and 11 second supply cups 172, and the total number of supply cups is 22. The first supply cup 171 and the second supply cup 172 are arranged along a loop-shaped transfer path R1 extending in the front-rear direction K1.

Specifically, the first supply cup 171 and the second supply cup 172 are arranged side by side in a loop so as to exhibit a long oval shape in the front-rear direction K1 in a plan view. Further, the first supply cup 171 and the second supply cup 172 are alternately arranged along the oval transfer path R1.
As shown in FIG. 20, the arrangement of the supply cups (first supply cup 171 and second supply cup 172) of the first seedling supply device 38A and the supply cups (first supply cup 171 and first supply cup 171 and second) of the second seedling supply device 38B. The arrangement of the 2 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 along the transfer path R1 by the transfer mechanism 177. 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 composed of sprockets, and the cord 180 is composed of an endless (loop-shaped) chain wound around the first rotating body 178 and the second rotating body 179. ing. The first rotating body 178 and the second rotating body 179 are rotatably supported by the apparatus frame 176 around the center of the vertical axis (the center of the axis extending in the vertical direction). The first supply cup 171 and the second supply cup 172 are arranged along the cord 180 on the outer peripheral side of the cord 180.

As shown in FIGS. 11 and 24, the first rotating body 178 rotates by transmitting power via the third transmission mechanism 115c and the fourth transmission mechanism 115d. As a result, the cord 180, the first supply cup 171 and the second supply cup 172 move in the direction of arrow Y1 (see FIG. 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 an accommodating portion 181a for accommodating the seedling N1 to be introduced, a mounting portion 182a attached to the cord 180, and a lid 183a for closing the opening at the lower end of the accommodating portion 181a. Have. The second supply cup 172 also has a housing portion 181b, a mounting portion 182b, and a lid 183b. The lids 183a and 183b are pivotally supported by hinges at the lower portions of the accommodating portions 181a and 181b, and the lower end openings of the accommodating portions 181a and 181b can be opened and closed. Since the lids 183a and 183b are closed, the seedling N1 can be held in the accommodating portions 181a and 181b. Further, by opening the lids 183a and 183b, the seedling N1 can be discharged downward from the accommodating portions 181a and 181b.

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

As shown in FIG. 37, the lid 183a of the first supply cup 171 opens on the left side of the transfer path R1. The first supply cup 171 indicated by reference numeral OP1 is the first supply cup 171 with the lid 183a open. The position indicated by reference numeral D1 is the first open position (open position on one side in the machine width direction) in which the lid 183a of the first supply cup 171 opens. The lid 183b of the second supply cup 172 opens on the right side of the transfer path R1. The second supply cup 172, designated by reference numeral OP2, is the second supply cup 172 with the lid 183b open. The position indicated by reference numeral D2 is the second open position (open position on the other side in the machine width direction) 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.

Further, the first open position D1 and the second open position D2 are seedling dropping positions where seedlings are dropped and supplied to the planting tool 64. That is, the seedling supply device 38 has a seedling dropping position, which is a position where seedlings are dropped and supplied to the planting tool 64 in the middle of the transfer path R1 in the front-rear direction.
As shown in FIG. 37, the first open position D1 and the second open position D2 are set to different positions in the front-rear direction K1. In the present embodiment, the first open position D1 is displaced rearward with respect to the second open position D2. The left planting device in each transplant unit is displaced rearward with respect to the right planting device in response to the first open position D1 being displaced rearward with respect to the second open position D2. ing.

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

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

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

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

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

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

The intermediate rod 176h connects the 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 have a U-shape in a plan view. The curved body 176j is arranged at the front portion of the apparatus 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 (cord body 180) of the supply cups 171 and 172. The front portion of the curved body 176j is fixed to the front standing body 176m erected at the front end portion of the base rod 176c. The rear portion of the curved body 176k is fixed to the rear standing body 176n erected at the rear end portion of the base rod 176c.

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

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

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 a first guide member 174L, 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 (cable body 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 part of the left rod 176a of the apparatus frame 176, and extends in the front-rear direction along the left rod 176a. The first guide member 174R is attached to the upper part of the right rod 176b of the apparatus frame 176, and extends in the front-rear direction along the right rod 176b.

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

The upper part of the first guide member 174L and the outer side (left side) of the machine width are covered with the 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 the 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, a contact portion 175b, and a connecting portion 175c. The mounting portion 175a has an inner portion 175a1 and an outer portion 175a2. The internal position 175a1 is attached to the upper part of the cord 180 via 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 external position 175a2 is arranged outside the inner portion 175a1 (the side farther from the supply cups 171 and 172 than the inner portion 175a1). The outer position 175a2 and the inner portion 175a1 are in contact with each other (surface contact) or connected to each other. That is, the outer position 175a2 and the inner part 175a1 may be integrated or separate.

The contact portion 175b is arranged on the outer peripheral side of the cord 180, and sequentially abuts on 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 extending surfaces 174La, 174Ra of the first guide members 174L, 174R. The connecting portion 175c connects the mounting portion 175a and the contact portion 175b. The external 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 the second guide members 175 is equal to the number of the supply cups 171 and 172. The attachment portion 175a of the second guide member 175 is arranged on the inner peripheral side (cord body 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 (opposite side to the cord 180 side) of the corresponding supply cup 171 (or 172). The connecting 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 integrally formed 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 and 172, and the extending portion may be used as 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 come into contact with each other to cause the cord 180 to sway or loosen 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 are in contact with each other (surface contact). do). Therefore, it is possible to suppress the sway and slack of the cord 180 in the machine width direction and the sway and slack of the cord 180 in the vertical direction.

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

As a result, it is possible to suppress the shaking and slackening of the cord 180 at least at the open positions of the lids 183a and 183b. Therefore, it is possible to prevent the lids 183a and 183b from opening at an unintended position and timing and causing the seedlings to fall.
The guide member 173 may guide the cord 180 at least when the cord 180 passes through the open positions D1 and D2, but the guide member 180 may guide the cord 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 (porting machine 3) of the ground working device 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. Further, the first rear chair 187C is provided behind the first transplant unit 36A, and the second rear chair 187D is provided behind the second transplant unit 36B.

In other words, in the transplanting machine 3 having the first seedling supply device 38A and the second seedling supply device 38B arranged side by side in the machine width direction K2, the first front chair 187A is provided in front of the first seedling supply device 38A. , The second front chair 187B is provided in front of the second seedling supply device 38B. Further, the first rear chair 187C is provided behind the first seedling supply device 38A, and the second rear chair 187D is provided behind the second seedling supply device 38B.

The first front chair 187A and the second front chair 187B are chairs on which the worker sits facing the rear (the seedling supply device 38 side). The first rear chair 187C and the second rear chair 187D are chairs on which the worker sits facing forward (the seedling supply device 38 side).
By providing chairs on which the worker sits in front of and behind the seedling supply device 38, the width of the work machine 1 (ground work device 1B) in the machine width direction K2 can be reduced (narrowed), and movement between fields is easy. At the same time, transportation during truck transportation becomes easy (advantageous). Further, since the first open position D1 (seedling drop position) and the second open position D2 (seedling drop position) are located in the middle of the transfer path R1 of the supply cups 171 and 172 in the front-rear direction, that is, the position where the seedlings are dropped. Is not in front of you, so it is easy to supply seedlings to the supply cups 171 and 172. In addition, since the work of the former worker and the work of the latter worker are unified, it becomes easy to change workers.

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 adjusting mechanism 230 is a mechanism that makes it possible to adjust the positions of the chairs (first front chair 187A and second front chair 187B) with respect to the transplanting machine (second ground working 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 adjusting mechanism 231 is a mechanism that makes it possible to adjust the positions of the chairs (first front chair 187A and second front chair 187B) 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 (first front chair 187A and second front chair 187B) to be adjusted in the vertical direction.

The position adjusting mechanism 230 includes a position adjusting mechanism 230A that allows the position of the first front chair 187A to be adjusted, and a position adjusting mechanism 230B that allows the position of the second front chair 187B to be adjusted. 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 FIGS. 43 and 46, the first position adjusting mechanism 231 of the position adjusting mechanism 230A has a fixing plate 231a fixed to the second support 152 of the chair support 150 and a mounting tool for the fixing plate 231a. It is composed of a movable plate 231b attached by (bolts 231c and nuts 231d). As shown in FIG. 12, the fixing plate 231a is fixed to the left portion of the lateral support member 158 of the second support 152. As shown in FIGS. 46 and 52, the fixing plate 231a is formed with a plurality of through holes 231e arranged in the machine width direction K2. The movable plate 231b is also formed with 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 interval (pitch). By overlapping 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 formed with respect to the fixed plate 231a. Positioned and mounted. Further, as shown by a virtual line in FIG. 43, the movable plate 231b is displaced from the fixed plate 231a in the machine width direction K2, and the movable plate 231b is attached to the fixed plate 231a by changing the overlapping through holes. 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 cylinder 233a fixed to the movable plate 231b and the cylinder 233a by a mounting tool (pin) 233c. It is composed of a prism body 233b. The cylinder 233a has a square cylinder shape and extends in the vertical direction. A through hole 233d is formed in the tubular body 233a. The pillar 233b has a square cylinder shape thinner than the cylinder 233a, is inserted into the cylinder 233a, and extends in the vertical direction. A plurality of through holes 233e arranged in the vertical direction are formed in the pillar 233b. By overlapping the through hole 233d formed in the cylinder 233a and the through hole 233e formed in the pillar 233b and inserting the pin 233c, the pillar 233b is positioned and attached to the cylinder 233a. Further, as shown by a virtual line in FIG. 45, the pillar body 233b is vertically displaced with respect to the cylinder body 233a, and the position of the pillar body 233b with respect to the cylinder body 233a is moved up and down by changing the through hole to be overlapped. Can be adjusted in direction.

As shown in FIGS. 44 and 46, the second position adjusting mechanism 232 of the position adjusting mechanism 230A has a support base 232a fixed to the upper end portion of the column body 233b and a mounting tool (bolt) 232c with respect to the support base 232a. It is composed of a bottom receiving member 232b which is attached by the chair and receives the bottom of the chair 187A. The support base 232a has an anterior 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 prism 233b. The anterior portion 232d is fixed to the anterior end portion of the intermediate portion 232e. A spring 234 that supports the 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 portion of the intermediate portion 232e. As shown in FIG. 54, the rear portion 232f has a through hole 232i through 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 part 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 arranged horizontally, and the front portion of the bottom surface of the first front chair 187A is attached to the upper surface thereof. 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, respectively. 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 part of the support base 232a, one of the plurality of 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 overlapping 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. And attached. Further, as shown by a virtual 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 hole to be overlapped is changed to attach the bottom receiving member 232b to the position of the bottom receiving member 232b with respect to the support base 232a. Can be adjusted in the front-back direction.

By adjusting the position of the bottom receiving member 232b in the front-rear 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-rear direction. Further, the position of the first front chair 187A can be adjusted in the vertical direction by adjusting the position of the pillar body 233b with respect to the tubular body 233a in the vertical direction by the third position adjusting mechanism 233. Further, 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 adjusting 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 and the second position adjusting mechanism 232 and the third position adjusting mechanism 233 are not limited to the above-mentioned configurations. For example, regarding the first position adjusting mechanism 231, the lateral support member 158 of the second support 152 is used as a square pipe, and a fixture having a U bolt instead of the fixing plate 231a is fixed to the lateral support member 158 and attached to the fixture. The movable plate 231b can be attached. According to this configuration, by loosening the fixture, the movable plate 231b can be moved together with the fixture in the machine width direction along the lateral support member 158. 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 transplanting machine 3, a footrest plate 235A on which a worker sitting on the first front chair 187A puts his / her foot is provided. Between the second front chair 187B and the transplant machine 3, a footrest plate 235B on which a worker sitting on the second front chair 187B puts his / her foot is provided. The footrest plates 235A and 235B are rectangular plates in a 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 repression device 20 of the rotary tiller 2. Further, the footrest plate 235A is arranged in front of and above the connecting bracket 61 (first attachment tool 61A) of the first machine frame 37A. The footrest plate 235B is arranged in front of and above the connecting bracket 61 (second attachment 61B) of the second machine frame 37B.

As shown in FIGS. 47 and 48, the footrest plate 235A is formed with a large number of ribbed holes 236 and a plurality of (four) through holes 237 through which bolts (wing bolts) B6 are inserted. 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 mounting portion 260A is a portion for mounting the footrest plate 235A. The mounting portion 260B is a portion for mounting the footrest plate 235B. 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 is composed of a front support member 151a and a rear support member 151b of the first support body 151, and a connecting support member 151c arranged on the left portion of the first support body 151. Has been done. A plurality (four) first stays 261 having nuts fixed between the connecting support members 151c adjacent to each other in the machine width direction K2 are attached to the front support member 151a and the rear support member 151b. 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 above the connecting support member 151c arranged on the left side of the first support body 151. , Is fixed to the first stay 261 by a bolt (wing bolt) B6.

As shown in FIG. 12, the mounting portion 260B is composed of a front support member 151a and a rear support member 151b of the first support body 151, and a connecting support member 151c arranged on the right side of the first support body 151. .. A second stay 262 to which a nut is fixed is attached to the front support member 151a and the rear support member 151b between the connecting support members 151c adjacent to each other in the machine width direction K2. The second stay 262 is provided in a plurality (four) like the first stay 261. The footrest plate 235B is placed on the front support member 151a and the rear support member 151b, and on the upper part of the connecting support member 151c arranged on the right side of the first support member 151, and the second stay 262 is provided by a bolt (wing bolt). Is fixed to.

The footrest plate 235A can be removed from the mounting portion 260A provided on the chair support 150 by removing the bolt (wing 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 (wing bolt) from the second stay 262. As a result, the spring of the oppressive device 20 of the rotary tiller 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 toolbar 43. (Adjustment between rows) can be easily performed. In addition, the position of the irrigation tube, which will be described later, can be easily adjusted.

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 part of the footrest plates 235A and 235B is attached to the front support member 151a of the first support 151 via a hinge (hinge), or the rear part of the footrest plates 235A and 235B is attached via a hinge (hinge). It can be attached to the rear support member 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 repression device 20 and adjust the distance between the first transplant unit 36A and the second transplant unit 36B. (Adjustment between rows), position adjustment of the irrigation tube, etc. 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 and vertically connected to a mounting body 196 mounted on the rotary tiller 2.

The seat frame 197 has a frame main body 199, a frame connecting 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 body 199 includes a first frame portion 201 arranged on the left side (one side) of the transplanting machine 3, a second frame portion 202 arranged on the right side (other side) of the transplanting machine 3, and a second frame body. It has a first frame portion 201 and a third frame portion 203 that connects the rear portions of the second frame portion 202 to each other. The first frame portion 201 and the second frame portion 202 are made of a square pipe material. The first frame portion 201 is arranged so as to extend in the front-rear direction K1 behind the first side member 196A. The second frame portion 202 is arranged so as to extend in the front-rear direction K1 behind the second side member 196B.

The third frame portion 203 is arranged behind the transplanting machine 3 so as to extend in the machine width direction K2. The third frame portion 203 is composed of a plurality of square pipe members (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 portion 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 adjustable in position in the front-rear direction and the up-down direction. As shown in FIG. 20, the second rear chair 187D is attached to the right portion of the third member 203C via the seat support member 227B. The configuration of the seat support member 227B is the same as the configuration of the seat support member 227A. The second rear chair 187D is attached to the seat support member 227B so as to be adjustable in position in the front-rear direction and the up-down direction. Further, the seat support members 227A and 227B are attached so as to be adjustable in position with respect to the third member 203C in the machine width direction K2. That is, the seat support members 227A and 227B have a position adjusting mechanism 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 up-down direction, respectively. The configuration of this position adjusting mechanism is the position adjusting mechanism 230 for adjusting the positions of the first front chair 187A and the second front chair 187B (first position adjusting mechanism 231, second position adjusting mechanism 232, third position adjusting mechanism 233). Is similar to.

As shown in FIGS. 20 and 49, a footrest plate 235C for a worker seated on the first rear chair 187C is arranged below the front of the first rear chair 187C. A footrest plate 235D for a worker seated on the second rear chair 187D is arranged below the front 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 vertically and vertically connecting the frame main body 199 to the mounting body 196. The frame connecting 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 composed of a parallel link mechanism.

The plurality of wheels (first wheel 206A to third wheel 206C) are composed of, for example, tires, and are grounded to support the frame body 199. Therefore, the seat frame 197 moves up and down with respect to the rotary tiller 2 and the transplanter 3 following the unevenness of the field.
The first wheel 206A is provided on one side (left side) of the machine width direction K2 in the frame body 199, and the second wheel 206B is provided on the other side (right side) of the machine width direction K2 in the frame body 199. There is. The third wheel 206C is provided in the middle portion (central portion) of the machine width direction K2 in the frame main body 199. 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, the link member 215 is provided over the working machine connecting 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 over the toolbar 43 and the link 209A on the upper side of the frame connecting 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 the member that moves up and down together with the transplanting machine 3 or the transplanting machine 3.

As shown in FIG. 20, the first link member 215A is arranged inside the machine 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 FIGS. 20 and 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 toolbar 43 via the pivot axis 229A around the axis in the machine width direction K2. It is rotatably supported. The upper portion (front portion) of the second link member 215B is rotatably supported around the axis in the machine width direction K2 via the pivot shaft 229B by the bracket member 228B fixed to the rear surface of the toolbar 43.

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 engaging pin 221 is inserted through the elongated hole 220 of the first link member 215A, and the right engaging 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. Further, the front end portion of the link member 215 may be pivotally supported by the machine frame 37.

When the seat frame 197 moves up and down during work, the engaging pin 221 moves in the elongated hole 220, so that the seat frame 197 moves up and down. Further, when the work machine 1 is loaded onto a truck or the like or is unloaded from the truck or the like, when the toolbar 43 is raised and the transplanting machine 3 is lifted, the link member 215 moves upward and the engaging pin 221 has an elongated hole 220. The seat frame 197 can be lifted (pulled up) by moving the link member 215 upward in a state where the engagement pin 221 is in contact with the lower end and the engagement pin 221 is in contact with the lower end of the slot 220.

As described above, the link member 215 allows the seat frame 197 to move up and down during work, and moves up as the second ground work machine rises when the transplanting machine 3 is lifted by the elevating drive device 42. The seat frame 197 can be pulled 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. Further, a seedling supply table 188C is provided in front of the first rear chair 187C. A seedling supply stand 188D is provided in front of the second rear chair 187D. The seedling supply table 188A is located on the front side of the worker seated on the first front chair 187A. The seedling supply table 188B is located on the front side of the worker seated on the second front chair 187B. The seedling supply table 188C is located on the front side of the worker seated on the first rear chair 187C. The seedling supply table 188D is located on the front side of the worker seated on the second rear chair 187D.

Seedling trays having a large number of seedlings can be placed on the seedling supply stands 188A to 188D. The worker can supply seedlings to the supply cups 171 and 172 of the seedling supply device 38 from the seedling trays placed on the seedling supply stands 188A to 188D.
First, the configurations of the seedling supply stands 188A and 188B will be described.
As shown in FIG. 12, the seedling supply stands 188A and 188B are attached to the position adjusting mechanism 230 that supports the front chair in a position-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 a position adjusting mechanism 230 that supports the second front chair 187B. The seedling supply table 188A and the seedling supply table 188B are symmetrically configured with the center line in the machine width direction K2 of the working machine 1 interposed therebetween. Except for this configuration (symmetrical configuration), the configuration of the seedling supply platform 188A and the configuration of the seedling supply platform 188B are the same, so the configuration of the seedling supply platform 188A will be described, and the description of the configuration of the seedling supply platform 188B will be omitted. 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 adjusting mechanism 232 via the support mechanism 270. The support mechanism 270 has a receiving cylinder 271, a support arm 272, and a rotation support mechanism 273. The receiving cylinder 271 is cylindrical and extends in the machine width direction, and is fixed to the intermediate portion 232e of the support base 232a. The support arm 272 is formed by bending a cylindrical pipe at two points. As shown in FIG. 47 and the like, the support arm 272 has an arm base end portion 272a, an arm intermediate portion 272b, and an arm tip 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 (right side) of the machine width. 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 as it extends rearward, it moves upward. The arm middle portion 272b is located on the inner side of the machine width of the first front chair 187A. As shown in FIGS. 45 and 47, the arm tip portion 272c bends 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 cylinder body 274a, a substrate 274b, and a regulation plate 274c. The outer cylinder body 274a is externally fitted to the upper portion of the arm tip portion 272c. The substrate 274b is fixed to the upper part of the outer cylinder 274a. The substrate 274b has two standing portions 274d that stand up from the front portion and the rear portion, respectively, and a first locking portion 274e to which one end of the spring 276 is locked. The regulation plate 274c is fixed to the substrate 274b. The regulation plate 274c has an outward protruding portion 274c1 protruding upward on the outer side (left side) of the machine width and an inward protruding portion 274c2 protruding upward on the inner side (right side) of the machine width. .. The outward protruding portion 274c1 projects upward from the substrate 274b on the left side of the substrate 274b. The inwardly projecting portion 274c2 projects upward from the substrate 274b on the right side of the substrate 274b. As shown in FIG. 51, the height of the outward protrusion 274c1 is higher than the height of the inward 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 inwardly projecting portion 274c2 and the outwardly projecting portion 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 mounting portion 191 on which a seedling tray can be placed, and a support structure 192 that supports the mounting portion 191. The support structure 192 has bending members 193F and 193B and a bar member 194. The bending members 193F and 193B are bent in an obtuse-angled V shape in the middle between one end and the other end. Hereinafter, the portion between one end portion of the bending material 193F, 193B and the middle portion (bending portion) is referred to as a "one end side portion", and between the other end portion of the bending material 193F, 193B and the middle portion (bending portion). The part of is called 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 bar member 194 is provided at one end side portion of the bending members 193F and 193B. The bar 194 extends in the front-rear direction over the bending member 193F and the bending member 193B. A second locking portion 194a to which the other end of the spring 276 is locked is provided at one end of the bar 194.

The mounting portion 191 is provided at the other end side portion of the bending members 193F and 193B. The mounting portion 191 has a plurality (two) receiving materials 191a extending in the front-rear direction over the bending material 193F and the bending material 193B, and a square annular receiving frame 191b attached to the receiving material 191a. There is. The receiving material 191a and the receiving frame 191b form 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 axis of the support shaft 275. The rotation range of the bending members 193F and 193B is regulated by the regulating plate 274c.
When the bending members 193F and 193B are rotated outward from the machine width, the bar member 194 comes into contact with the outward protruding portion 274c1 of the regulation plate 274c, and further rotation becomes 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, the bar member 194 comes into contact with the inwardly protruding portion 274c2 of the regulation plate 274c, and further rotation becomes impossible. In this state, the seedling supply table 188A is in the second posture in which the seedling placing surface faces in the vertical direction. The second posture includes a case where the seedling placing surface faces the 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 bar 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 rod member 194 is maintained in contact with the inwardly projecting portion 274c2, so that the first posture is maintained. The spring 276 pulls the bar 194 toward the outward protrusion 274c1 when the seedling supply table 188A is in the second posture. As a result, unless the operator applies a particular force, the bar member 194 is maintained in contact with the outward protrusion 274c1, so that the second posture is maintained.

When the seedling supply table 188A is in the first posture, the seedling tray is placed on the seedling storage surface. The mounting portion 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 worker sitting on the first front chair 187A and facing the first seedling supply device 38A picks up the seedlings on the seedling tray placed on the seedling storage surface of the mounting section 191 in front of him. 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 portion 191 (before or after the start or end of the seedling supply work), the seedling supply table 188A is set to the second posture in which the seedling placing surface faces up and down. When the seedling supply table 188A is in the second posture, the mounting portion 191 is located on the inner side of the machine width of the first front chair 187A. Further, when the seedling supply table 188A is in the second posture, the mounting portion 191 is located on the inner side of the machine width of the second front chair 187B. As a result, 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 tables 188A and 188B.

Further, as shown by the arrow A1 in FIG. 46, the arm base end portion 272a of the support arm 272 can rotate around the axis center of the receiving cylinder 271 (the axis circumference in the machine width direction). As shown in FIG. 53, the mounting portion 191 can be moved from the front to the side of the first front chair 187A by rotating the arm base end portion 272a around the axis of the cylinder 271.
Further, as described above, since the seedling supply table 188A and the seedling supply table 188B are symmetrically configured with the center line in the machine width direction of the working machine 1 interposed therebetween, the seedling supply table 188A and the seedling supply table 188B are configured. Can be replaced and used. 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 placed on the receiving tube 271 of the support mechanism 270 that supports the seedling supply table 188A. It can also be inserted from the outside of the width (left side) and attached to the support base 232a.

Similarly, the seedling supply table 188B is removed, and one end side of the arm base end portion 272a of the seedling supply table 188A is inserted into the receiving tube 271 of the support mechanism 270 that supports the seedling supply table 188B from the outside (right side). It can be attached to the support base 232a.
When the seedling supply table 188A and the seedling supply table 188B are replaced, the mounting unit 191 is the machine of 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 on the outer side of the width.

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

Further, the seedling supply table 188C and the seedling supply table 188A are centered in the front-rear direction of the first seedling supply device 38A when the first rear chair 187C and the first front chair 187A are arranged at the same position in the machine width direction. It is configured symmetrically across the line. Except for this configuration (symmetrical configuration) and mounting position (point that it is mounted on the seat support member 227A instead of the chair support 150), the configuration of the seedling supply table 188A and the configuration of the seedling supply table 188C are the same.

Further, the seedling supply table 188D and the seedling supply table 188B are centered in the front-rear direction of the second seedling supply device 38B when the second rear chair 187D and the second front chair 187B are arranged at the same position in the machine width direction. It is configured symmetrically across the line. Except for this configuration (symmetrical configuration) and mounting position (point that it is mounted on the seat support member 227B instead of the chair support 150), the configuration of the seedling supply table 188B and the configuration of the seedling supply table 188D are the same.

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

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

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

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

As shown in FIGS. 2, 13, and 55, the working machine 1 includes spare seedling stands 280L and 280R for mounting the container CN for accommodating the seedling tray. The spare seedling stands 280L and 280R are arranged above the rotary tiller 2. The spare seedling stand 280L is located above the left portion of the rotary tiller 2 and in front of the first front chair 187A. The spare seedling stand 280R is located above the right part of the rotary tiller 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 for the arrangement. 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 spare 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 strut 281, the second strut 282, the third strut 283, and the fourth strut 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 strut 281 is arranged in front of the second strut 282. The third strut 283 is arranged in front of the fourth strut 284. The first strut 281 is arranged to the left of the third strut 283. The second support column 282 is arranged on the left side 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 a 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 mounting plate 288 is mounted on the mounting frame body 287. In FIG. 2, the mounting plate 288 is omitted.

The mounting plate 288 is a rectangular plate whose length in the machine width direction is longer than the length in the front-rear direction. A space SPA is formed between the mounting plate 288 and the rotary tiller 2 (between the upper cover 19A). In other words, the mounting plate 288 is arranged so as to float above the rotary tiller 2.
As shown in FIGS. 1 and 3, a container CN for accommodating a seedling tray is placed on a mounting plate 288 of the spare seedling stands 280L and 280R. The container CN is a rectangular parallelepiped box whose length in the vertical direction is longer than the length in the front-rear direction and the length in the machine width direction. A plurality of seedling trays can be arranged side by side in the container CN in the vertical direction. The front of the container CN is open, and the worker can take out the seedling tray housed in the container CN from the front. Further, the empty seedling tray on the seedling supply stand 188 or the seedling loading stand 190 can be replaced with the seedling tray in the container CN. The replacement of the seedling tray is performed by a worker seated 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 wound with an irrigation tube. 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 tiller 2. That is, the tube roll 290 is arranged behind the traveling body 1A and in front of the rotary tiller 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. Further, 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 rotatably supported around the axis in the machine width direction by the roll support 291. As shown in FIG. 55, the roll support 291 has a shaft body 292, bearings 293L, 293R, and support rods 294L, 294R. As shown in FIG. 2, the shaft body 292 is arranged in front of the rotary tiller 2 and extends in the machine width direction K2. As shown in FIG. 55, the shaft body 292 is arranged at a position lower than the mounting plate 288 of the spare seedling stand 280L of the rotary tiller 2.

The bearing 293L rotatably supports one end side of the shaft body 292. The bearing 293R rotatably supports the other end side 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. A bearing 293L is supported at the rear of the support rod 294L. A bearing 293R is supported at the rear of the support rod 294R.

The tube roll 290 is attached to the shaft body 292. The tube roll 290 rotates about the axis in the machine width direction with the rotation of the shaft body 292. The irrigation tube can be unwound by rotating the tube roll 290. The irrigation tube can be extended rearward through the space SPA between the mounting plate 288 of the spare nursery 280L and the rotary tiller 2. Further, the irrigation tube can be passed below 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 is run. 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 irrigation tube is unwound from the tube roll 290 and laid in the ridge formed by the working machine 1. Seedlings planted in the ridges can be irrigated from the laid irrigation tube.

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

The multi-film laying device 300 lays the multi-film on each of the two ridges UN1 and UN2 formed side by side in the width direction of the tractor 1A (same as the machine width direction K2). Hereinafter, for convenience of explanation, of the two ridges UN1 and UN2, the ridge formed on the left side is referred to as "first ridge UN1", and the ridge formed on the right side is referred to as "second ridge UN2".
As shown in FIG. 56, the multi-film laying device 300 has a first roll support shaft 301 and a second roll support shaft 302. The first roll support shaft 301 supports the first film roll 303 around which the mulch film laid on the first ridge UN1 is wound. The second roll support shaft 302 supports the second film roll 304 on which the mulch film laid on the second ridge UN2 is wound.

The first roll support shaft 301 and the second roll support shaft 302 are extended in the width direction (machine width direction K2) of the tractor 1A. The first roll support shaft 301 and the second roll support shaft 302 overlap each other in the width direction of the tractor 1A (machine width direction K2). In other words, the portion 301a on the inner side of the machine width of the first roll support shaft 301 overlaps with the portion 302a on the inner side of the machine width of the second roll support shaft 302 in the machine width direction K2.

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

As shown in FIG. 56, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be offset in the front-rear direction K1. As a result, as shown in FIGS. 1 and 57, the first film roll 303 and the second film roll 304 are arranged so as to be offset in the front-rear direction K1. In the case of the present embodiment, the first roll support shaft 301 is arranged in front of the second roll support shaft 302. However, the first roll support shaft 301 may be arranged behind the second roll support shaft 302. Further, although not shown, the first roll support shaft 301 and the second roll support shaft 302 may be arranged so as to be offset in the vertical direction.

Both ends of the first roll support shaft 301 are supported by the first shaft supports 305L and 305R. The first shaft support 305L supports the left end portion (the end portion on the outer side of the machine width) of the first roll support shaft 301. The first shaft support 305R supports the right end portion (the end portion 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 portion (the end portion 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 body 196 and extends in the machine width direction K2. The first shaft support 305L has 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 outward (to the left) of the machine width from the lower portion. 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 about the support shaft 312. A concave locking portion 311a cut out from above to below is formed at the other end (rear end) of the fifth support member 311, and the first roll support shaft is formed on the locking portion 311a. One end (left end) of 301 is locked. Above the locking portion 311a, a cover plate 313 for preventing disengagement of one end of the first roll support shaft 301 locked to the locking portion 311a is fixed by a bolt or the like. As a result, one end (left end) of the first roll support shaft 301 is supported by the first shaft support 305L.

As shown in FIG. 60, the first support member 307 has a plurality of mounting holes 307a arranged side by side at intervals in the machine width direction K2. The third support member 309 has a mounting hole 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 holes 307a and the mounting holes 309a, inserting bolts, and screwing nuts. By shifting the third support material 309 with respect to the first support material 307 in the machine width direction K2 and changing the mounting hole 309a to be overlapped with the mounting hole 307a, the third support material 309 with respect to the first support material 307. Can be fixed by shifting it 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) in which 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 305R is attached to the intermediate connecting 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 connecting body 55 (upper member 55a) and extends to the right. The sixth support member 314 extends rearward from the right end portion of the fifth support member 313. The front portion of the sixth support member 314 is swingably pivotally supported with respect to the fifth support member 313. As a result, 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 (right end) of the first roll support shaft 301 is supported with respect to the first shaft support 305R.

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

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

As shown in FIG. 56, the multi-film laying device 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 and the second soil covering member 322, the third soil covering member 323, and the fourth soil covering member 324 are composed of a disk-shaped soil covering disk.
The first soil covering member 321 and the third soil covering member 323 are provided in an inclined shape so as to move toward the first ridge UN1 side toward the rear. The second soil covering member 322 and the fourth soil covering member 324 are provided in an inclined shape that shifts to the second ridge UN2 side toward the rear.

The first soil covering member 321 is arranged behind the right portion of the first film roll 303. The first soil covering member 321 covers one end (right end) of the multi-film unwound from the first film roll 303 and laid on the first ridge UN1 on the second ridge UN2 side. The second soil covering member 322 is arranged behind the left portion of the second film roll 304. The second soil covering member 322 covers one end (left end) of the multi-film unwound from the second film roll 304 and laid on the second ridge UN2 on the first ridge UN1 side.

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

The first soil covering member 321 and the second soil covering member 322 are arranged so as to be offset 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, the soil covering member of either the first soil covering member 321 or the second soil covering member 322 may be arranged behind the other soil covering member. Which of the first soil covering member 321 and the second soil covering member 322 is arranged rearward can be determined by the front-back 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). Further, the first soil covering member 321 and the second soil covering member 322 overlap each other in the front-rear direction K1 as well.
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 offset in the front-rear direction K1 in the same manner as 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 soil covering member) arranged at the rear is located below the lower end portion of the soil covering member (the other soil covering member) arranged at 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 configuration, the second soil covering member 322 can attract the 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. There is no shortage of soil attracted by the second soil covering member 322 arranged behind the soil covering member 322.

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 connecting body 55 via the first connecting frame 325 and the bracket 326. The first connection frame 325 is swingably connected upward or downward with respect to the bracket 326 fixed to the intermediate connecting body 55.
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 support member 307. The second connection frame 327 is swingably connected to the bracket 328 fixed to the first support member 307 via a support shaft 316 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 connecting frame 329 and the like. Since the attachment structure of the fourth soil covering member 324 to the second side member 196B is the same as the attachment 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 device 300 includes a first film presser 331, a second film presser 332, a third film presser 333, and a fourth film presser 334. The first film presser 331, the second film presser 332, the third film presser 333, and the fourth film presser 334 are composed of, for example, wheels.

The first film presser 331 and the third film presser 333 are provided in an inclined shape so as to move forward toward the first ridge UN1 side. The second film presser 332 and the fourth film presser 334 are provided in an inclined shape so as to move forward toward the second ridge UN2 side.
The first film presser 331 is arranged behind the first film roll 303. The first film presser 331 presses one end (right end) of the second ridge UN2 side (right end) of the multi-film laid on the first ridge UN1. The second film presser 332 is arranged behind the second film roll 304. The second film presser 332 presses one end (left end) of the multi-film laid on the second ridge UN2 on the first ridge UN1 side (left side). The third film presser 333 is arranged behind the first film roll 303. The third film presser 333 presses the other end (left end) of the mulch film laid on the first ridge UN1. The fourth film presser 334 is arranged behind the second film roll 304. The fourth film presser 334 presses the other end (right end) of the mulch film laid on the second ridge UN2.

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

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

As shown in FIG. 61, the first film presser 331 is connected to the first connection frame 325 via the first connection body 335. The second film presser 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 presser 333 is attached to the second connection frame 327 via the third connection body 337. As shown in FIG. 56, the fourth film presser 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 effects described below.
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 able to move up and down, and planting seedlings in the field. The elevating drive device 42 that elevates and drives the second ground work machine 3, the chairs (first front chair 187A, second front chair 184B) on which the worker who works on the second ground work machine 3 sits, and the first. It is provided with a working machine connecting mechanism 41 for integrally connecting the second ground working machine 3 and the chairs 187A and 184B to the ground working machine 2.

According to this configuration, since the traveling body 1A is provided with the working machine connecting mechanism 41 for integrally connecting the second ground working machine 3 and the chairs 187A and 187B to the first ground working machine 2. In the work machine equipped with the first ground work machine 2 to be mounted and the second ground work machine 3 mounted on the second ground work machine 3 so as to be able to move up and down, the height and the second of the chairs 187A and 187B on which the worker sits. The relationship with the height of the ground work machine 3 can be made constant. Therefore, even when the second ground work machine 3 is raised and lowered, the worker sitting on the chairs 187A and 187B can easily perform the work on the second ground work machine 3.

Further, the working machine connecting mechanism 41 includes a toolbar 43 to which the second ground working machine 3 is attached, and a chair support 150 connected to the toolbar 43 and supporting the chairs (first front chair 187A, second front chair 184B). It also has a connecting link mechanism 44 that connects the toolbar 43 and the chair support 150 to the first ground work machine 2 so as to be able to move up and down.
According to this configuration, the toolbar 43 and the chair support 150 can be integrally raised and lowered by the connecting link mechanism 44. Therefore, by raising and lowering the toolbar 43, the chairs 187A and 187B on which the worker sits and the second ground working machine are used. It is possible to move up and down integrally with 3.

Further, the connecting link mechanism 44 has a lower link 44A, 44B and an upper link 44C, and the lower link 44A, 44B has a chair support 150 and a first ground working machine 2 on one end side in the length direction of the toolbar 43. It has a first lower link 44A for connecting the chair support 150 and a second lower link 44B for connecting the chair support 150 and the first ground work machine 2 on the other end side in the length direction of the toolbar 43, and has an upper link. The 44C connects the chair support 150 and the first ground work machine 2 at the central portion in the length direction of the toolbar 43.

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 working machine 3 can be raised and lowered in parallel with the ground.
Further, the connecting link mechanism 44 has a connecting member 44D that connects the first lower link 44A and the second lower link 44B.
According to this configuration, since the first lower link 44A and the second lower link 44B can be connected and integrated, twisting is prevented from occurring between the first lower link 44A and the second lower link 44B. can do.

Further, the elevating drive device 42 has an elevating cylinder C1 that connects the first ground working machine 2 and the upper link 44C.
According to this configuration, the upper link 44C can be raised and lowered by expanding and contracting the elevating cylinder C1 to raise and lower the chair support 150 and the second ground working machine 3 with respect to the first ground working machine 2.

Further, the second ground working machine 3 enters the field when it is connected to the working machine connecting mechanism 41 and is lifted and lowered by the lifting drive device 42, and is supported by the machine frame 37 so as to be liftable and lowered. It has a planting tool 64 for planting seedlings, and a machine frame 37 is attached to a toolbar 43.
According to this configuration, by raising and lowering the toolbar 43 by the elevating drive device 42, the planting tool 64 can be raised and lowered together with the machine frame 37 to adjust the planting depth.

Further, the working machine 1 includes spare seedling stands 280L and 280R for mounting the container CN for accommodating the seedling tray, and the spare seedling stands 280L and 280R are arranged above the first ground working machine 2.
According to this configuration, the container CN containing the seedling tray can be placed on the spare seedling stands 280L and 280R arranged above the first ground working machine 2. Therefore, the seedling tray can be replenished above the first ground work machine 2 in a state of being housed in the container CN without taking it out of the container CN.

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

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

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 accepts seedlings is provided, the chair can be changed in response to changes in the height of the rows and ridges of the seedlings to be planted. The positions of 187A and 187B can be adjusted.
Further, the position adjusting mechanism 230 has a first position adjusting mechanism 231 that can adjust the position of the chair (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.

According to this configuration, the positions of the chairs 187A and 187B can be adjusted to K2 in the machine width direction by the first position adjusting mechanism 231 in response to a change in the spacing between the seedlings to be planted.
Further, the position adjusting mechanism 230 has a second position adjusting mechanism 232 that can adjust the position of the chair (first front chair 187A, second front chair 184B) in the front-rear direction K1.
According to this configuration, the positions of the chairs 187A and 187B can be adjusted in the front-rear direction by the second position adjusting mechanism 232 according to the physique of the worker and the like.

Further, the position adjusting mechanism 230 has a third position adjusting mechanism 232 that can adjust the position of the chair (first front chair 187A, second front chair 184B) in the vertical direction.
According to this configuration, the third position adjusting mechanism 233 allows the chairs 187A and 187B to correspond to the height of the ridges, the height of the sleeves (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 working machine 1 is a working machine connecting mechanism that integrally connects the second ground working machine 3 and the chairs (first front chair 187A, second front chair 184B) to the first ground working machine 2. 41 is provided, and the work machine connecting mechanism 41 is a chair support that is connected to the toolbar 43 to which the second ground work machine 3 is attached and supports the chairs (first front chair 187A, second front chair 184B). The position adjusting 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 after keeping the relationship between the heights of the chairs 187A and 187B on which the worker sits and the height of the second ground working machine 3 constant. Can be done. Therefore, the positions of the chairs 187A and 187B with respect to the second ground work machine 3 can be adjusted accurately and easily.
Further, the working machine 1 is arranged between the chair (first front chair 187A, second front chair 184B) and the second ground working machine 3, and is placed on the chair (first front chair 187A, second front chair 184B). The chair support 150 includes mounting portions 260A and 260B to which the footrest plates 235A and 235B are detachably attached or can be opened and closed.

According to this configuration, by removing or opening the footrest plates 235A and 235B with respect to the mounting portions 260A and 260B, the footrest plates 235A and 235B can be easily accessed downward. Therefore, for example, the spring of the repression device 20 of the rotary tiller 2 can be easily adjusted, the distance between the first transplanting unit 36A and the second transplanting unit 36B can be adjusted (inter-row adjustment), the position of the irrigation tube can be easily adjusted, and the like. It can be carried out.

Further, the working machine 1 has a seedling supply device 38 for transferring a large number of supply cups 171 and 172 for accommodating seedlings along a loop-shaped transfer path R1, and a seedling for placing seedlings to be supplied to the seedling supply device 38. The seedling supply table 188 is provided with a supply table 188, and the seedling supply 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 table 188 and the chair supported by the chair support 150 can be fixed. Therefore, the seedlings can be stably supplied from the seedling supply table 188 to the seedling supply device 38.

Further, the seedling supply table 188 can be changed in posture between a first posture in which the seedling placing surface faces in the horizontal direction and a second posture in which the seedling placing surface faces in the vertical direction.
According to this configuration, when the seedlings are not supplied to the seedling supply device 38, by setting the seedling stand 188 in the second posture, it is possible to prevent the seedling stand 188 from hindering the movement of the worker or the like. ..

Further, the working machine 1 includes a traveling body 1A, a machine frame 37 mounted behind the traveling body 1A, and a transplanting machine 3 supported by the machine frame 37 and having a planting device 39 for planting seedlings in a field. The elevating drive device 42 that raises and lowers the machine frame 37 with respect to the traveling body 1A, the detection member 83 that moves up and down according to the unevenness of the field, the wire 97 that moves along with the up and down movement of the detection member 83, and the wire. It is provided with a control valve 165 that switches the elevating 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 as the machine frame 37 moves.

According to this configuration, the control valve 165 is brought into the first state in which the machine frame 37 of the transplanting machine 3 is raised and the second state in which the control valve 165 is lowered by the movement of the wire 97 accompanying the vertical movement of the detection member 83 following the unevenness of the field. Since it can be switched, the planting depth can be adjusted accurately with a simple configuration. This makes it possible to reduce variations in planting depth.
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, and the support frame 82 is vertically swingable with respect to the machine frame 37 and is a detection member. It is arranged passing above the 83.

According to this configuration, as compared with the case where the support frame 82 is arranged through the side of the detection member 82, the adjacent detection members 83 (for example, the soil covering rings 81L and 81R of the first soil covering device 40AL on the left and the right The distance between the soil covering rings 81L, 81R) of the first soil covering device 40AR can be narrowed. Therefore, it is possible to narrow the space between the seedlings while avoiding the support frames 82 from interfering with each other.

Further, the transplanting machine 3 is arranged on one side in the width direction of the transplanting machine 3 and has a plurality of first planting devices 39AL and 39AR, and the first transplanting unit 36A and the other side in the width direction of the transplanting machine 3. A second transplantation unit 36B arranged in and having a plurality of second planting devices 39BL, 39BR, a distance adjusting mechanism for adjusting the distance between the first transplantation unit 36A and the second transplantation unit 36B, and a plurality of second transplantation devices. A first angle adjusting mechanism that can adjust the relative angle between one planting device 39AL and 39AR, and a second angle adjusting mechanism that can adjust the relative angle between a plurality of second planting devices 39BL and 39BR. I have.

According to this configuration, the distance adjusting mechanism can adjust the distance between the first transplantation unit 36A and the second transplantation unit 36B. In addition, the distance between the planting devices in each transplanting unit can be adjusted by adjusting the relative angle between the planting devices in each transplanting unit by the first angle adjusting mechanism and the second angle adjusting mechanism. can. That is, it is possible to make adjustments for each unit and for each planting device in each unit. Therefore, it is possible to adjust the inter-rows corresponding to various planting forms such as 1 ridge 4 rows and 2 ridges 2 rows.

Further, the working machine 1 includes a toolbar 43 arranged behind the traveling body 1A and extending in the width direction, and the distance adjusting mechanism is movably attached along the toolbar 43 and fixed to the first transplant unit 36A. It has a first attachment 61A and a second attachment 61B that is movably attached along the toolbar 43 and fixed to the second transplant unit 36B.

According to this configuration, the first transplant unit 36A and the second transplant unit 36B can be moved independently along the toolbar 43, so that the distance between the first transplant unit 36A and the second transplant unit 36B can be reached. Adjustments can be made easily.
Further, the machine frame 37 includes a first machine frame 37A to which a plurality of first planting devices 39AL and 39AR are mounted, and a second machine frame 37B to which a plurality of second planting devices 39BL and 39BR are mounted. Including, the first transplant unit 36A has a first machine frame 37A, the second transplant unit 36B has a second machine frame 37B, and the first angle adjusting mechanism is a plurality of first planting devices 39AL, 39AR. The mounting angle with respect to the first machine frame 37A can be adjusted individually, and the second angle adjusting mechanism can individually adjust the mounting angle of the plurality of second planting devices 39BL and 39BR with respect to the second machine frame 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 it can be adjusted individually, it is possible to easily perform inter-row adjustment corresponding to various planting forms.
Further, the first transplantation unit 36A has a plurality of first soil covering devices 40AL and 40AR mounted on the first machine frame 37A corresponding to each of the plurality of first planting devices 39AL and 39AR, and the second transplantation unit 36A. The unit 36B has a plurality of second soil covering devices 40BL and 40BR mounted on the second machine frame 37B corresponding to each of the plurality of second planting devices 39BL and 39BR, and the transplanting machine 3 has a first soil covering device 3. It has a first position adjusting unit for adjusting the position of the devices 40AL and 40AR in the width direction, and a second position adjusting unit for adjusting the position of the second 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 in response to the adjustment of the positions of the plurality of planting devices, so that the planting and soil covering operations corresponding to various planting forms can be performed. Is possible.
Further, the working machine 1 has a prime mover E1, a main shaft 107 that receives power from the prime mover E1 and rotates around an axis extending in the width direction, and the rotational power of the main shaft 107 is used for 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, and a second rotating shaft 107B that rotates by receiving power from the first rotating shaft 107A. It has a connecting shaft 107L that connects the first rotating shaft 107A and the second rotating shaft 107B, and the first rotating shaft 107A and the second rotating shaft 107B can move in the width direction with respect to the connecting shaft 107L. be.

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

According to this configuration, the length of the spindle 107 can be easily adjusted in response to the adjustment of the distance between the first transplant unit 36A and the second transplant unit 36B, and the first transplant unit 36A can be adjusted. And the power can be reliably transmitted to the second transplant 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 for accommodating seedlings along a loop-shaped transfer path R1. A transfer mechanism including a seedling supply device 38 including a transfer mechanism 177 and a ground work machine (second ground work machine) 3 having a planting tool 64 for planting seedlings supplied from the seedling supply device 38 in a field. The 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 accompanied by 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 supply cups 171 and 172 can be transferred by preventing the cord 180 from loosening. 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 first guide members 174L, 174R attached to the device frame 176 and the cord 180. It has a second guide member 175 that moves while abutting on one guide member 174L and 174R.

According to this configuration, as the cord 180 moves, the second guide member 175 moves while abutting on the first guide members 174L and 174R. Therefore, it is possible to prevent the cord 180 from slackening during movement and 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 accommodating portions 181a and 181b that accommodate the seedlings and have openings at the lower ends, the attachment portions 182a and 182b attached to the cord 180, and the accommodating portions 181a and 181b. The seedling supply device 38 has a setting member 185 for setting the opening positions D1 and D2 of the lids 183a and 183b in a part of the transfer path R1, and the guide member 173 is at least open. Guide the movement of the cord 180 at positions D1 and D2.

According to this configuration, the guide member 173 can suppress the swing and slack of the cord 180 at the open positions D1 and D2 of the lids 183a and 183b. Therefore, it is possible to prevent the lids 183a and 183b from opening at unintended positions and timings and causing the seedlings to fall.
Further, the working machine 1 has a tension applying body (fifth idler 255, sixth idler 256) that applies tension to the cord 180, and the tension applying 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 tensioning body can suppress the shaking and slackening of the cord 180. Therefore, it is possible to prevent the lids 183a and 183b from opening at unintended positions and timings and causing the seedlings to fall.
Further, the cord 180 is a chain, and the tension applying bodies (fifth idler 255, sixth idler 256) are sprockets that rotate by meshing with the chain.

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

According to 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 sway and slack of the cord 180 in the machine width direction and the sway and slack of the cord 180 in the vertical direction.
Further, the working machine 1 includes a traveling body 1A, a rotary tiller 2 mounted on the rear portion of the traveling body 1A, and a ridger 51 having a mounting portion attached to the rotary tiller 2, and the mounting portion is provided. , The front mounting portions 51La, 51Ra, 51Ma provided in the front portion of the ridger 51, and the rear mounting portions 51Lb, 51Rb, 51Mb provided in the rear portion of the ridger 51.

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

Further, the rotary tiller 2 has a tiller portion 18 that cultivates the field, a rotary machine frame 11, a rotary cover 19 that is attached to the rotary machine frame 11 and covers the tiller portion 18, and a transmission that transmits power to the tiller portion 18. It has a transmission case 12 for accommodating a mechanism, a mounting body 196 is attached to the rotary machine frame 11, and the front mounting portions 51La, 51Ra, 51Ma are attached to the rotary cover 19 or the transmission case 12. The rear mounting portions 51Lb, 51Rb, and 51Mb are mounted on the mounting body 196.

According to this configuration, the front mounting portions 51La, 51Ra, 51Ma and the rear mounting portions 51Lb, 51Rb, 51Mb can be reliably mounted on the rotary tiller 2. In particular, in the center drive type rotary tiller 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. , It is possible to prevent the ridger behind the transmission case 12 from being worn.

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

According to this configuration, the side ridgers 51L and 51R and the intermediate ridger 51M can be reliably attached to different positions in the width direction of the rotary tiller 2.
Further, the outer end portion of the side ridges 51L and 51R in the width direction is located outside the outer end portion of the side cover 19C in the width direction.
According to this configuration, the distance between the side ridges 51L and 51R and the intermediate ridges 51M can be increased, so that the ridge width can be widened.

Further, 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 includes 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. The side ridgers 51L and 51R have an intermediate member 196C arranged in the above, and the first side ridger 51L arranged on one side in the width direction and the other side in the width direction. The rear mounting portion 51Lb of the first side ridger 51L including the arranged second side ridger 51R is attached to the first side member 196A and is rear of the second side ridger 51R. The mounting portion 51Rb is attached to the second side member 196B, and the rear mounting portion 51Mb of the intermediate ridger 51M is attached to the intermediate member 196C.

According to this configuration, the rear mounting 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 mounting 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 transplanting machine 3 mounted on the rear portion of the rotary tiller 2 and for planting seedlings in the field, the ridger 51 is arranged in front of the transplanting machine 3, and the transplanting machine 3 is a ridger. Seedlings are planted in the ridges formed by 51.

According to this configuration, even in a field that has not been sufficiently cultivated in advance, the ridges can be reliably formed by the ridger 51, and seedlings can be planted in the ridges formed by the transplanting machine 3.
Further, the multi-film laying device 300. A multi-film laying device that is mounted behind the traveling body 1A and lays a multi-film on ridges formed in a field, and is a first film roll around which a multi-film laid on the first ridge UN1 is wound. The second roll support shaft 302 that supports the first roll support shaft 301 that supports 303 and the second film roll 304 on which the multi-film laid on the second ridge UN2 adjacent to the first ridge UN1 is wound. The first roll support shaft 301 and the second roll support shaft 302 extend in the width direction of the traveling body 1A and overlap in the width direction.

According to this configuration, since the distance between the first film roll 303 and the second film roll 303 can be narrowed, the gap between the two adjacent ridges can be narrowed and the multi-film can be laid. Therefore, the mulch film can be laid satisfactorily 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 offset 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 displaced in the width direction of the traveling body 1A. It can be surely overlapped.
Further, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be offset in the vertical direction.

According to this configuration, the first roll support shaft 301 and the second roll support shaft 302 are displaced in the vertical direction, so that the first roll support shaft 301 and the second roll support shaft 302 are displaced in the width direction of the traveling body 1A. It can be surely overlapped.
Further, the multi-film laying device 300 includes a first soil covering member 321 that covers the end of the multi-film laid on the first ridge UN1 on the second ridge UN2 side with soil, and a mulch laid on the second ridge UN2. A second soil covering member 322 for covering the end portion of the film on the first ridge UN1 side with soil is provided, and the first soil covering member 321 and the second soil covering member 322 are arranged so as to be offset in the front-rear direction.

According to this configuration, the distance 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 edges 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 laying the multi-film with the ridges narrowed to the two adjacent ridges (first ridge and second ridge), the first soil covering is applied to the end of the laid multi-film. The member 321 and the second soil covering member 322 can surely cover the soil.
Further, the soil covering member of either the first soil covering member 321 or the second soil covering member 322 is arranged behind the other soil covering member, and the lower end portion of the one soil covering member is the lower end portion of the other soil covering 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 is gathered by the front soil covering member to cover the soil, and then the soil is gathered from a position deeper than the front soil covering member by the rear soil covering member. Can be covered with soil. Therefore, since the soil is attracted by the front soil covering member, the soil attracted by the rear soil covering member is not insufficient, and both the first soil covering member 321 and the second soil covering member 322 can reliably cover the soil. It will be possible.

Further, the multi-film laying device 300 includes a first film presser 331 that holds the end 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. It has a second film presser 332 that presses the end portion of the first ridge UN1 side, and the first film presser 331 and the second film presser 332 are arranged so as to be offset in the front-rear direction.

According to this configuration, when the multi-film is laid with the ridges narrowed with respect to the two adjacent ridges (the first ridge and the second ridge), one end of the multi-film to be laid is set to the first. It can be reliably pressed by the film presser 331 and the second film presser 332.
Further, the working machine 1 includes the multi-film laying device 300 and a transplanting machine 3 mounted behind the traveling body 1A and for planting seedlings in the ridges.

According to this configuration, the seedling transplanting work and the multi-film laying work can be performed in combination.
Although one embodiment of the present invention has been described above, it should be considered that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Work machine 1A Traveling body 2 1st ground work machine 3 2nd ground work machine 42 Lifting drive device 187A Chair (1st front chair)
187B chair (second front chair)
41 Work equipment 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 Elevating cylinder 37 Machine frame 64 Planting tool CN Container 280L Spare seedling stand 280R Spare seedling stand 290 Tube roll

Claims (8)

The first ground work machine mounted on the rear of the traveling body,
The second ground work machine, which is mounted on the rear part of the first ground work machine so as to be able to move up and down and for planting seedlings in the field,
An elevating drive device that elevates and drives the second ground work machine, and
A chair on which a worker working on the second ground work machine sits,
A work machine connecting mechanism that integrally connects the second ground work machine and the chair to the first ground work machine so as to be able to move up and down.
A working machine equipped with. The working machine connecting mechanism is
The toolbar to which the second ground work machine is attached and
A chair support that is connected to the toolbar and supports the chair,
A connecting link mechanism that connects the toolbar and the chair support to the first ground work machine so as to be able to move up and down.
The working machine according to claim 1. The connecting link mechanism has a lower link and an upper link.
The lower link is a first lower link connecting the chair support and the first ground work machine on one end side in the length direction of the toolbar, and the chair support on the other end side in the length direction of the toolbar. It has a second lower link that connects the body and the first ground work machine, and has.
The working machine according to claim 2, wherein the upper link connects the chair support and the first ground working machine at a central portion in the length direction of the toolbar. The working machine according to claim 3, wherein the connecting link mechanism has a connecting member for connecting the first lower link and the second lower link. The working machine according to claim 3 or 4, wherein the raising / lowering drive device has a raising / lowering cylinder for connecting the first ground working machine and the upper link. The second ground work machine is
A machine frame that is connected to the working machine connecting mechanism and is raised and lowered by the raising and lowering drive device,
A planting tool that is supported by the machine frame so that it can be raised and lowered and that rushes into the field to plant seedlings when descending.
Have,
The working machine according to any one of claims 2 to 5, wherein the machine frame is attached to the toolbar. Equipped with a spare seedling stand for mounting a container for storing seedling trays
The working machine according to any one of claims 1 to 6, wherein the spare seedling stand is arranged above the first ground working machine. Equipped with a tube roll wound with an irrigation tube to supply water to the planted seedlings
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 working machine.

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