WO2020085494A1

WO2020085494A1 - Mulch-film laying apparatus and work machine

Info

Publication number: WO2020085494A1
Application number: PCT/JP2019/041944
Authority: WO
Inventors: 野坂　健吉; 征四郎門脇; 瑛史瀬尾; 正夫長谷川
Original assignee: 株式会社クボタ
Priority date: 2018-10-26
Filing date: 2019-10-25
Publication date: 2020-04-30
Also published as: KR20210077749A; CN112888300B; CN112888300A

Abstract

Provided is a mulch-film laying apparatus (300) that is mounted behind a traveling body (1A) and that lays down mulch films on furrows formed in a field, the mulch-film laying apparatus (300) including: a first roll support shaft (301) that supports a first film roll (303) about which a mulch film to be laid down on a first furrow is wound; and a second roll support shaft (302) that supports a second film roll (304) about which a mulch film to be laid down on a second furrow adjacent to the first furrow is wound, wherein the first roll support shaft and the second roll support shaft are provided so as to extend in a width direction of the traveling body and so as to overlap with each other in the width direction.

Description

Multi-film laying device and work machine

The present invention relates to, for example, a mulch film laying device for laying mulch film in a field, and a working machine for planting seedlings in a field.

Conventionally, the working machine disclosed in Patent Document 1 is known.
The working machine disclosed in Patent Document 1 includes a rotary working machine, a ridge forming device, and a multi-film laying device, and forms a ridge in a field cultivated by the rotary working machine to lay a multi-film. You can
Further, conventionally, the working machine disclosed in Patent Document 2 is known.

The work machine disclosed in Patent Document 2 includes a rotary tiller and a ridger attached to the rotary tiller.

Japanese Patent Publication “JP 2006-27316 16” Japanese patent publication "JP-A-2016-167983"

However, in the working machine disclosed in Patent Document 1, it is not possible to lay the mulch film by narrowing the ridge between two adjacent ridges.
Further, in the working machine disclosed in Patent Document 2, the ridger is attached to the rotary cultivator only at the rear part, so in a field with many gravel or a field in which advance cultivation is not sufficiently performed, the ridger is erected. There is a problem that an excessive load is applied to the mounting portion of the vessel.

In view of the above situation, the present invention provides a multi-film laying device and a working machine capable of laying a multi-film by narrowing the ridge between two adjacent ridges.
Further, in view of the above-mentioned circumstances, the present invention provides a working machine capable of preventing an excessive load from being applied to the attachment portion of the ridger even in a field where advance plowing is not sufficiently performed. To do.

A mulch-film laying apparatus according to an aspect of the present invention is a multi-film laying apparatus that is mounted behind a traveling body and lays a mulch-film on a ridge formed in a field, and is laid on a first ridge. A first roll support shaft that supports a first film roll around which a mulch film is wound, and a second film roll around which a mulch film laid on a second ridge adjacent to the first ridge is wound. And a second roll support shaft, wherein the first roll support shaft and the second roll support shaft extend in the width direction of the traveling body and overlap in the width direction.

Further, the working machine includes the above-mentioned mulch film laying device and a transplanting machine which is mounted on the rear side of the traveling body and which plant seedlings in the ridges.
A working machine according to an aspect of the present invention includes a traveling body, a rotary cultivator mounted on a rear portion of the traveling body, and a ridger having a mounting portion attached to the rotary cultivator, and the mounting. The section includes a front attachment portion provided at a front portion of the ridger and a rear attachment portion provided at a rear portion of the ridger.

According to the mulch film laying apparatus and the working machine described above, since the first roll support shaft and the second roll support shaft overlap in the width direction of the traveling vehicle, the ridge between two adjacent ridges is narrowed and the mulch film is formed. Can be laid.
According to the above working machine, since the ridger is attached to the rotary cultivator by the front attachment portion and the rear attachment portion, it is possible to disperse the load applied to the attachment portion of the ridger. Therefore, it is possible to prevent an excessive load from being applied to the attachment portion of the ridger even in a field where the advance plowing is not sufficiently performed.

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

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

In the present embodiment, a tractor that is a traveling vehicle is illustrated as the traveling body 1A. Further, a rotary cultivator is illustrated as the first ground work machine 2. Further, a transplanter for planting seedlings in the field is illustrated as the second ground work machine 3. Hereinafter, the traveling body is referred to as a tractor 1A, the first ground working machine is referred to as a rotary cultivator 2, and the second ground working machine is referred to as a transplanter 3.
FIG. 1 shows a side view of the working machine 1. Unless otherwise specified in the embodiment, the front side (left side in FIG. 1) of the driver seated in the driver's seat 5 of the tractor 1A is front, the rear side (right side in FIG. 1) of the driver is rear, and the left side of the driver (FIG. 1 will be described as the left side and the driver's right side (the back side in FIG. 1) as the right side. Further, a horizontal direction K2 (see FIG. 2) that is a direction orthogonal to the front-rear direction K1 (see FIG. 1) of the tractor 1A will be described as a machine width direction K2.

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

As shown in FIG. 1, the tractor 1A includes a vehicle body 6 and a traveling device 7 including a front wheel 7F attached to a front portion of the vehicle body 6 and a rear wheel 7R attached to a rear portion of the vehicle body 6. The vehicle body 6 includes a prime mover (driving source) E1 and a power transmission case T1 connected to a rear portion of the prime mover E1.
The prime mover E1 is, for example, a diesel engine.
The power transmission case T1 is configured by directly connecting a clutch housing including a clutch, a transmission case including a transmission, a differential case including a differential device, and the like.

In the rear part of the vehicle body 6, the driver's seat 5 is mounted, and a power take-off shaft (so-called PTO shaft) 22 for taking out the power of the prime mover E1 is provided in a rearward protruding shape. That is, the traveling body 1A has the power takeoff shaft 22 that takes out the power of the prime mover E1. A steering wheel 8 is provided in front of the driver's seat 5. Further, the tractor 1A has a battery (not shown) mounted on the front portion.

FIG. 4 shows the power transmission device 4 that transmits the power of the prime mover E1 to the power takeoff shaft 22 and the traveling device 7.
The power transmission device 4 includes a main propulsion shaft 4a, a main transmission unit 4b, an auxiliary transmission unit 4c, a shuttle unit 4d, a PTO clutch 4e, and a PTO propulsion shaft 4f.
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.

As shown in FIGS. 5, 6, and 8, the rotary cultivator 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 cultivator 2 in the width direction (the same direction as the machine width direction K2).

As shown in FIGS. 5 to 7, a rotary shaft 16 having a shaft center in the machine width direction K2 is provided in a lower portion of the transmission case 12 in a protruding manner in one and the other of the machine width direction K2. A large number of plowing pawls 17 are fixed to the outer periphery of the rotary shaft 16 via brackets. The rotary shaft 16 and the plowing claw 17 configure a plowing section 18 for plowing the field.
As shown in FIGS. 5, 6 and 8, the tilling section 18 is covered with a rotary cover 19 attached to the rotary machine frame 11. The rotary cover 19 has an upper cover 19A, a rear cover 19B, and a side cover 19C. The upper part of the cultivating part 18 is covered with an upper cover 19A. The rear of the tiller 18 is covered with a rear cover 19B. An upper end of the rear cover 19B is rotatably supported by the rotary machine frame 11 via a pivot shaft 19D about an axis in the machine width direction K2, and is vertically swingable. The rear cover 19B is urged downward by the elastic pressure device 20. The elastic device 20 is a device that urges the rear cover 19B downward by the force of a spring. The rear cover 19B forms the upper surface of the ridge formed by the ridger 51 described later.

The sides of the tiller 18 are covered with a side cover 19C. The side cover 19C has a first side cover 19CL and a second side cover 19CR. The first side cover 19CL is arranged on one side (left side) of the rotary cultivator 2 in the width direction (machine width direction K2). The second side cover 19CR is arranged on the other side (right side) of the rotary cultivator 2 in the width direction (machine width direction K2).

The first side cover 19CL is attached to the left side frame 15L. The second side cover 19CR is attached to the right side frame 15R. The first side cover 19CL and the second side cover 19CR have the same configuration except that they are attached at different positions.
As shown in FIGS. 8 and 9, the first side cover 19CL includes an upper side cover 19C1, a lower side cover 19C2, a front side cover 19C3, and a support cover 19C4. The upper side cover 19C1 covers a lateral upper part of the tilling part 18. The lower side cover 19C2 covers a lateral lower part of the tilling part 18. The upper side cover 19C1 is attached to the left side frame 15L. The lower side cover 19C2 is connected to the upper side cover 19C1 via a connection plate 19C5. The front side cover 19C3 extends forward from the front end of the upper side cover 19C1.

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

As shown in FIGS. 8 to 10, the ridger 51 is attached to the attachment body 196. The ridger 51 is composed of, for example, a ridger. The ridger 51 has a shape in which the width (length in the machine width direction) increases from the front to the rear in a plan view. As shown in FIGS. 8 and 10, the ridger 51 includes

side ridgers

51L and 51R and an intermediate ridger 51M. The side ridger 51L, 51R includes a first side ridger 51L and a second side ridger 51R. Therefore, two ridges are formed by forming grooves in the soil cultivated by the rotary cultivator 2 with three ridge risers (first side ridge riser 51L, intermediate ridge riser 51M, second side ridge riser 51R). Can be formed. The upper surface of the ridge is formed by the rear cover 19B. It should be noted that three or more ridges may be formed.

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

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

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

The mounting structure of the front mounting portion 51Ra and the rear mounting portion 51Rb of the second side ridger 51R is similar to the mounting structure of the front mounting portion 51La and the rear mounting portion 51Lb of the first side ridger 51L.
As shown in FIG. 6, the widthwise outer end of the rotary tiller 2 of the

side ridges

51L and 51R (the end on the machine width outer side) is the width of the rotary tiller 2 of the side cover 19C. It is located outside the outer end in the direction (the end on the outer side of the machine width). Specifically, the left end of the first side ridger 51L is located to the left of the left end of the first side cover 19CL. The right end of the second side ridger 51R is located to the right of the right end of the second side cover 19CR.

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

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

As shown in FIGS. 5, 6, 8 and 9,

earth moving disks

56L and 56R are arranged in front of the rotary cultivator 2. The earth-moving

disks

56L and 56R are members for moving the soil inward in the machine width toward the tilling part 18. The earth gathering disc 56L is arranged on one side (left side) in the machine width direction and is located on the left front side of the rotary cultivator 2. The earth gathering disc 56R is arranged on the other side (right side) in the machine width direction, and is located on the right front side of the rotary cultivator 2. The

earth gathering disks

56L and 56R are arranged obliquely so as to move from the machine width outside to the machine width inside as going from the front to the rear in a plan view. The

earth gathering discs

56L and 56R are attached to the front support frame 13F of the rotary machine frame 11 via a disc mounting body 57 and a bracket (not shown). The length of the disc mounting body 57 can be adjusted by taking the lower member 57b in and out of the upper member 57a. By adjusting the length of the disk mounting body 57, the height of the earth-moving

disks

56L and 56R can be adjusted.

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

As shown in FIGS. 7 and 11, a first gear (bevel gear) G1 is provided at the rear of the input shaft 21. The first gear G1 meshes with a second gear (bevel gear) G2. The second gear G2 is provided on the first transmission shaft S1 having an axis in the machine width direction K2. The first transmission shaft S1 is provided with a third gear (spur gear) G3. The third gear G3 meshes with a fourth gear (spur gear) G4 located below the third gear G3. The fourth gear G4 meshes with a fifth gear (spur gear) G5 located below the fourth gear G4. The fifth gear G5 is provided on the rotary shaft 16. Therefore, the power transmitted to the input shaft 21 is transmitted to the rotary shaft 16 via the first to fifth gears G1 to G5, and the rotary shaft 16 rotates in the direction of arrow X1 in FIG.

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

As shown in FIG. 11, a sixth gear G6 is provided at one end (left end) of the second transmission shaft S2. The sixth gear G6 rotates integrally with the second transmission shaft S2. The sixth gear G6 is a pulse detection gear for measuring the rotation speed of the second transmission shaft S2.
As shown in FIG. 11, a pulse sensor 25 that outputs a pulsed signal (generates a pulse) by detecting the unevenness of the sixth gear G6 is provided near the sixth gear G6.

As shown in FIG. 11, an electromagnetic clutch 24 is provided on one end side (left end side) of the second transmission shaft S2. The electromagnetic clutch 24 intermittently transmits the power transmitted to the second transmission shaft S2 to the third transmission shaft S3. The power transmitted to the third transmission shaft S3 is transmitted to the transplanter 3 via the power transmission system shown in FIG. 11 to drive the transplanter 3 (specifically, the transplanter 3 is equipped with The planting tool 64 and the

seedling supply devices

38A and 38B described later are driven).

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

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

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

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

Hereinafter, the first machine casing 37A and the second machine casing 37B are collectively referred to as a machine casing 37. The first seedling supply device 38A and the second seedling supply device 38B are also collectively referred to as a seedling supply device 38. The first planting device 39A and the second planting device 39B are also collectively referred to as a planting device 39. The first soil covering device 40A and the second soil covering device 40B are collectively referred to as a soil covering device 40.
The seedling supply device 38 is a device that supplies seedlings (soil block seedlings, etc.) to the planting device 39. The planting device 39 is a device for planting the seedlings supplied from the seedling supply device 38 in the field, and is raised and lowered by the power of the prime mover E1 to hold and descend the seedlings and plunge into the field to plant the seedlings. 64. The soil covering device 40 is a device that applies soil to the root portion of the planted seedling to cover the soil and suppresses the root portion of the seedling.

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

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

The toolbar 43 is formed by a square pipe and is provided behind the rear support frame 13R and extends in the machine width direction K2. The transplanter 3 is attached to the toolbar 43. Specifically, the first transplant unit 36A (first machine frame 37A) and the second transplant unit 36B (second machine frame 37B) are attached to the toolbar 43. Further, the first transplantation unit 36A and the second transplantation unit 36B are attached to the tool bar 43 so that their positions can be adjusted in the machine width direction K2.

As shown in FIG. 12 and the like, a chair support 150 is connected to the toolbar 43. The chair support 150 supports chairs (first front chair 187A and second front chair 187B) on which an operator who works on the transplanter 3 sits. The chair support 150 is arranged between the rotary cultivator 2 and the transplanter 3. The chair support 150 includes a first support 151, a second support 152, a connection body 153, and a position adjusting mechanism 230.

The first support 151 has a front support member 151a, a rear support member 151b, and a connection support member 151c. The front support member 151a and the rear support member 151b are arranged at intervals in the front-rear direction and extend in the machine width direction K2 in parallel with each other. The connection support member 151c extends in the front-rear direction and connects the front support member 151a and the rear support member 151b. The connection support member 151c includes a plurality (six) of connection support members 151c. The plurality of connection support members 151c are arranged in parallel with each other with a space in the machine width direction. Of the plurality of connection support members 151c, two connection support members 151c1 and 151c2, which are arranged with the center in the machine width direction sandwiched therebetween, have

pillar members

155L and 155R extending upward, respectively. . A support shaft 156 extending in the machine width direction is attached to an upper portion of the column member 155L and an upper portion of the column member 155R.

The second support body 152 has

vertical support members

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

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

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

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

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

In the working machine coupling mechanism 41 having the above configuration, when the

lower links

44A and 44B swing up and down around the

support shafts

161L and 161R by the driving of the lifting drive device 42, the upper link 44C moves up and down around the support shaft 161M. Rock to. As a result, the chairs (the first front chair 187A and the second front chair 187B) supported by the chair support 150 and the transplanter 3 are integrally moved up and down. Here, since the connecting link mechanism 44 is configured by a parallel link mechanism, the

chairs

187A and 187B and the transplanter 3 move up and down in parallel with the ground.

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

As shown in FIG. 14, when the elevating cylinder C1 is extended (the piston rod C1b is advanced from the cylinder body C1a), the upper link 44C and the

lower links

44A and 44B swing upward and are supported by the chair support 150. The chairs (the first front chair 187A and the second front chair 187B) and the transplanter 3 (machine frame 37) rise. Further, when the lifting cylinder C1 is shortened (the piston rod C1b is retracted), the upper link 44C and the

lower links

44A, 44B swing downward, and the chair supported by the chair support 150 (the first front chair 187A and The second front chair 187B) and the transplanter 3 (machine frame 37) descend.

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

The lifting drive device 42 may be configured by an electric cylinder (electric actuator) or an electric hydraulic cylinder (electric hydraulic actuator).
Next, the machine frame 37 of the transplanter 3 will be described with reference to FIGS. 16 to 18.
The first machine casing 37A and the second machine casing 37B have the same configuration.
The machine casing 37 has a main frame 65 and a connecting bracket 61. A seedling supply device 38A, a planting device 39A, a soil cover device 40A, etc. are mounted on the main frame 65 of the first machine casing 37A, and a seedling supply device 38B, a planting device 39B, and a soil cover device are mounted on the main frame 65 of the second machine casing 37B. 40B etc. are mounted.

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

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

That is, the transplanter 3 includes an adjustment mechanism that adjusts the distance between the first transplant unit 36A and the second transplant unit 36B. Hereinafter, this adjusting mechanism is referred to as a "distance adjusting mechanism". The distance adjusting mechanism has a connecting bracket 61 (first mounting tool 61A) of the first machine frame 37A and a connecting bracket 61 (second mounting tool 61B) of the second machine frame 37B.
The main frame 65 includes a plurality of frame members formed of square pipes (first frame member 65a, second frame member 65b, third frame member 65c, fourth frame member 65d, fifth frame member 65e, sixth frame member 65e). 65f, 7th frame material 65g, 8th frame material 65h, 9th frame material 65i, 10th frame material 65j, 11th frame material 65k, 12th frame material 65m, 13th frame material 65n, 14th frame material 65o, The fifteenth frame material 65p, the sixteenth frame material 65q, the seventeenth frame material 65r, the eighteenth frame material 65s, and the nineteenth frame material 65t). The connection bracket 61 is arranged between the eleventh frame member 65k and the twelfth frame member 65m.

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

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

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

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

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

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

As described above, it is possible to adjust the relative angle between the first planting device 39AL and the first planting device 39AR by using the

adjustment grooves

66L, 66R and the adjustment holes 67L, 67R. That is, the

adjustment grooves

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

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

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

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

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

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

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

A housing 166 for housing the control valve 165 and the like is attached to the connection frame 130. The container 166 is attached to an upper portion of the third connecting frame member 133 and a front portion of the fourth connecting frame member 134. A first operating lever 167 and a second operating lever 168 for operating the control valve 165 and the like project from the upper portion of the container 166.
Next, the power transmission mechanism 105 that transmits the power from the prime mover E1 to the seedling supply device 38 and the planting device 39 will be described.

As shown in FIGS. 11 and 24, a seventh gear (bevel gear) G7 is provided at the rear end of the output shaft 32 that transmits the power from the prime mover E1. The seventh gear G7 meshes with the eighth gear (bevel gear) G8. The eighth gear G8 is provided at one end (left end) of the main shaft 107. As a result, the power from the prime mover E1 is transmitted from the output shaft 32 to the main shaft 107.

As shown in FIGS. 20 and 24, the main shaft 107 extends in the machine width direction K2 at right angles to the output shaft 32. As shown in FIG. 20, the main shaft 107 is provided across the first machine frame 37A and the second machine frame 37B. The main shaft 107 is composed of a plurality of shafts and a connecting shaft that interlocks and connects the shafts, and is expandable / contractible corresponding to the position adjustment of the

machine casings

37A, 37B in the machine width direction K2. The main shaft 107 receives power from the prime mover E1 transmitted from the output shaft 32 and rotates. Power is transmitted from the main shaft 107 to the seedling supplying device 38 and the planting device 39 of each

transplantation unit

36A, 36B.

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

As shown in FIGS. 24 and 25, the main shaft 107 has a rotating shaft (first rotating shaft 107A, second rotating shaft 107B, third rotating shaft 107C) and connecting

shafts

107L and 107R. The first rotating shaft 107A rotates by receiving power from the prime mover E1. The second rotating shaft 107B rotates by receiving power from the first rotating shaft 107A. The second rotating shaft 107B is composed of a left shaft 107B1 and a right shaft 107B2 connected by a coupling CP. The third rotating shaft 107C rotates by receiving power from the second rotating shaft 107B.

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

The first rotating shaft 107A, the second rotating shaft 107B, and the third rotating shaft 107C are spline shafts having unevenness in the circumferential direction. The connecting

shafts

107L and 107R are tubular spline bearings with which the spline shafts mesh. The first rotating shaft 107A and the second rotating shaft 107B are movable with respect to the connecting

shafts

107L and 107R in the width direction of the transplanter 3 (the same as the machine width direction K2). In other words, the first rotating shaft 107A and the second rotating shaft 107B can move in the machine width direction K2 (left or right) by changing the length of the meshing portion with the connecting

shafts

107L and 107R. As shown in FIG. 25, by moving the first rotary shaft 107A and the second rotary shaft 107B in the machine width direction K2 with respect to the connecting

shafts

107L and 107R, the main shaft 107 can expand and contract in the machine width direction K2. That is, by sliding the spline shaft with respect to the spline bearing, the main shaft 107 can expand and contract in the machine width direction K2.

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

As shown in FIG. 25, the cover cylinder 110 includes a plurality of cover cylinders (first cover cylinder 110A and second cover cylinder 110B). The plurality of

cover cylinders

110A and 110B are movable in the machine width direction K2 along the main shaft 107. The first cover cylinder 110A covers the outer circumference of the connecting shaft 107L. The second cover cylinder 110B covers the outer periphery of the connecting shaft 107R.
Since the outer periphery of the main shaft 107 is covered with the cover cylinder 110, the first rotating shaft 107A, the second rotating shaft 107B, the third rotating shaft 107C, and the connecting

shafts

107L and 107R that form the main shaft 107 are protected from the outside. be able to. Further, since the cover cylinder 110 includes the plurality of cover cylinders 110 that are movable in the machine width direction along the main shaft 107, expansion and contraction of the main shaft 107 in the machine width direction K2 can be dealt with.

The power transmitted to the main shaft 107 (the first rotating shaft 107A, the second rotating shaft 107B, the third rotating shaft 107C, and the connecting

shafts

107L and 107R) is transmitted through the power transmission mechanism to the first transplant unit 36A and the second transplant unit 36B. Be transmitted to. As shown in FIG. 11, the transmission mechanism includes a first transmission mechanism 115a to a twelfth transmission mechanism 115m.
As shown in FIGS. 11, 24, and 27, the power transmitted to the main shaft 107 is transmitted to the first shaft 111 via the first transmission mechanism (chain winding transmission mechanism) 115a. Further, the power transmitted to the main shaft 107 is transmitted to the second shaft 112 via the second transmission mechanism (chain winding transmission mechanism) 115b.

The power transmitted to the first shaft 111 is transmitted to the first seedling supply device 38A via the third transmission mechanism (bevel gear transmission mechanism) 115c and the fourth transmission mechanism (chain winding transmission mechanism) 115d. The power transmitted to the second shaft 112 is transmitted to the second seedling supply device 38B via the fifth transmission mechanism (bevel gear transmission mechanism) 115e and the sixth transmission mechanism (chain winding transmission mechanism) 115f.

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

Next, the planting device 39 will be described.
The first planting device 39A and the second planting device 39B are similarly configured. The left first planting device 39AL and the right first planting device 39AR are configured in the same manner except that they are symmetrically configured.
As shown in FIGS. 27 and 28, the first planting device 39AL and the first planting device 39AR are arranged side by side in the machine width direction K2 and at different positions in the front-rear direction K1. The first planting device 39AL is attached to the first planting frame 78L, and the first planting device 39AR is attached to the second planting frame 78R.

The first planting device 39AL includes a planting tool 64 and a planting lifting mechanism 139. The 1st planting apparatus 39AR has the planting implement 64 and the planting raising / lowering mechanism 139 similarly to the 1st planting apparatus 39AL.
Hereinafter, the planting tool 64 in the first planting apparatus 39AL may be referred to as a planting tool 64AL, and the planting tool 64 in the first planting apparatus 39AR may be referred to as a planting tool 64AR. Further, the planting elevating mechanism 139 in the first planting device 39AL may be referred to as a planting elevating mechanism 139AL, and the planting elevating mechanism 139 in the first planting device 39AR may be referred to as a planting elevating mechanism 139AR.

The planting tool 64 is a member for planting seedlings in a field (ridge). The planting tool 64 has a beak shape with its tip facing downward (see FIG. 27) and has a front structural body 140 and a rear structural body 141. The planting tool 64 is openable / closable by the front component 140 and the rear component 141 being separated and approached in the front-rear direction K1. The front component 140 and the rear component 141 are biased in a closing direction by a tension spring.

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

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

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

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

The first case 120 and the second case 121 rotate 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 about one of the horizontal axes, the second case 121 moves to the first case 120 in association with the rotation of the first case 120. Is provided with a power transmission device so as to rotate in the opposite direction (the other side around the axis in the horizontal direction).

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

In the planting device 39 having the above configuration, the planting tool 64 reciprocates up and down once when the

support shafts

118L and 118R rotate once.
Next, the soil covering device 40 will be described.
The structures of the first soil covering device 40A and the second soil covering device 40B are similarly configured.
The first soil covering device 40AL and the first soil covering device 40AR have the same configuration.

As shown in FIGS. 29 to 32, the first soil covering device 40AL includes a plurality of soil covering devices (first soil covering device 81L, second soil covering device 81R) and a support frame 82 that supports the

soil covering devices

81L and 81R. Have. In the case of the present embodiment, since the

soil cover

81L, 81R is the soil cover ring, hereinafter, the

soil cover

81L, 81R will be referred to as the soil cover 81L. 81R will be described.
81 L of soil-covering rings and 81 R of soil-covering rings contact | abut on the field upper surface (ground) behind the planting tool 64, rotate, and soil the root part of the planted seedling, covering it and suppressing the root part of the seedling.

The soil cover ring 81L and the soil cover ring 81R can move up and down independently of each other, and move up and down following the unevenness of the field. When the planting device 39 is positionally adjustable in the machine width direction K2, the soil cover device 40 is configured to be positionally adjustable in the machine width direction K2.
81 L of soil-covering wheels and 81 R of soil-covering wheels function as the detection member 83 which detects the ground height of the machine frame 37. The height above ground of the machine casing 37 is the relative height of the lower end of the machine casing 37 to the planting surface on which the seedlings are planted. The planting surface is a field surface that is leveled by the rear cover 19B of the rotary cultivator 2. When a ridge is formed in the field, the planting surface is the upper surface of the ridge.

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

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

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

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

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

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

As shown in FIG. 33 and the like, a weight 94 is placed on the mounting stay 89U. The rod member 90 penetrates the weight 94. The weight 94 pushes the rear portion (joint portion 82c) of the support frame 82 downward to ground the detection member 83 (covering

wheels

81L, 81R).
As shown in FIGS. 29 and 31, the front end portion of the front portion 82d of the support frame 82 is attached to the boss 84 via the attachment plate 95. As a result, the support rod 85 rotates about the axis along with the vertical swing of the support frame 82. A first swing plate 96 is attached to the support rod 85. The rear portion of the first swing plate 96 is fixed to the support rod 85, and the front portion swings up and down as the support rod 85 rotates (see FIG. 30).

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

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

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

When the detection member 83 (covering

wheels

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

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

Describing in more detail, the planting depth according to the detection result by the detection member 83 (height of the detection member 83) is preset, 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 moving the wire 97 (the position of the outer shell body 98), and the amount of movement of the wire 97 accompanying the vertical movement of the detecting member 83 is increased or decreased (the detecting member. By changing the correspondence between the magnitude of the vertical movement of 83 and the movement amount of the wire 97), the planting depth corresponding to the vertical movement of the detection member 83 can be changed.

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

The raising / lowering control of the transplanter 3 according to the unevenness of the field is performed independently of the rotary cultivator 2 mounted on the rear part of the tractor 1A. Thereby, the planting precision of the seedlings can be improved.
Next, the seedling supply device 38 will be described.
As shown in FIG. 3, the seedling supply device 38 is arranged above the first planting device 39A and the second planting device 39B. Specifically, the first seedling supply device 38A is arranged above the first planting device 39A. The second seedling supply device 38B is arranged above the second planting device 39B.

The seedling supply device 38 is a device for dropping and supplying seedlings to the planting tool 64 located below the seedling supply device 38.
Since the first seedling supply device 38A and the second seedling supply device 38B have the same configuration, the structure of the first seedling supply device 38A will be described with reference to FIGS. 37 to 42.
As shown in FIGS. 3, 20, and 37, the first seedling supply device 38A has a device frame 176 supported by the first machine frame 37A. Similarly, the second seedling supply device 38B also has a device frame 176 supported by the second machine casing 37B.

As shown in FIGS. 20 and 37, the seedling feeding device 38 has a large number of feeding

cups

171 and 172 into which seedlings are put. The plurality of supply cups includes a plurality of first supply cups 171 and a plurality of second supply cups 172. The 1st supply cup 171 and the 2nd supply cup 172 are arrange | positioned along the loop-shaped transfer path R1 extended in the front-back direction K1.
Specifically, the first supply cup 171 and the second supply cup 172 are arranged side by side in a loop so as to present an ellipse elongated in the front-rear direction K1 in a plan view. Moreover, the 1st supply cup 171 and the 2nd supply cup 172 are alternately arrange | positioned along the oval transfer path R1.

As shown in FIG. 20, the arrangement of the supply cups (the first supply cup 171 and the second supply cup 172) of the first seedling supply device 38A and the supply cups (the first supply cup 171 and the first supply cup 171 of the second seedling supply device 38B) are arranged. The arrangement of the two supply cups 172) is symmetrical with respect to the center line in the machine width direction K2.
As shown in FIG. 37, the first supply cup 171 and the second supply cup 172 are intermittently transferred in the arrow Y1 direction by the transfer mechanism 177 along the transfer route R1. The transfer mechanism 177 has a first rotating body 178, a second rotating body 179, and a cord 180. The first rotating body 178 and the second rotating body 179 are formed by sprockets, and the cord 180 is formed by an endless (loop-shaped) chain wound around the first rotating body 178 and the second rotating body 179. ing. The first rotary body 178 and the second rotary body 179 are rotatably supported by the device frame 176 about a vertical axis (a vertical axis extending in the vertical direction). The first supply cup 171 and the second supply cup 172 are arranged on the outer peripheral side of the cord 180 along the cord 180.

As shown in FIGS. 11 and 24, the first rotating body 178 rotates by being transmitted with power via the third transmission mechanism 115c and the fourth transmission mechanism 115d. As a result, the cord 180, the first supply cup 171, and the second supply cup 172 move in the arrow Y1 direction (see FIG. 37). As shown in FIG. 11, power is transmitted to the first rotating body 178 of the second seedling supply device 38B via the fifth transmission mechanism 115e and the sixth transmission mechanism 115f.

As shown in FIG. 41, the first supply cup 171 includes a storage portion 181a that stores the seedling N1 to be input, a mounting portion 182a that is attached to the cord 180, and a lid 183a that closes the opening at the lower end of the storage portion 181a. Have. Similarly, the second supply cup 172 has a housing portion 181b, a mounting portion 182b, and a lid 183b. The

lids

183a and 183b are hinged to the lower portions of the

housing portions

181a and 181b by hinges, and the lower end openings of the

housing portions

181a and 181b can be opened and closed. Since the

lids

183a and 183b are closed, the seedling N1 can be held in the

storage portions

181a and 181b. Further, by opening the

lids

183a and 183b, the seedlings N1 can be discharged downward from the

accommodating portions

181a and 181b. The seedling supplying device 38 has a seedling dropping position, which is a position where the seedlings are dropped and supplied to the planting tool 64, in the middle of the transfer route R1 in the front-rear direction. The position indicated by reference numeral D1 in FIG. 37 is the first open position (the open position on one side in the machine width direction) in which the lid 183a of the first supply cup 171 opens. The position indicated by reference sign D2 is the second open position (the open position on the other side in the machine width direction) in which the lid 183b of the second supply cup 172 opens.

As shown in FIGS. 2 and 3, the work machine 1 has a plurality of chairs on which a worker who works on the second ground work machine (transplanter 3) of the ground work apparatus 1B sits. The plurality of chairs are a plurality of front chairs (first front chair 187A, second front chair 187B) and a plurality of rear chairs (first rear chair 187C, second rear chair 187D). The first front chair 187A is provided in front of the first transplant unit 36A, and the second front chair 187B is provided in front of the second transplant unit 36B. The first rear chair 187C is provided behind the first transplant unit 36A, and the second rear chair 187D is provided behind the second transplant unit 36B.

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

The first front chair 187A and the second front chair 187B are chairs on which the worker sits facing the rear side (seedling supply device 38 side). The first rear chair 187C and the second rear chair 187D are chairs on which the worker sits facing the front (the seedling supply device 38 side).
By providing a chair on which a worker sits before and after the seedling supply device 38, the width of the working machine 1 (ground working device 1B) in the machine width direction K2 can be reduced (narrowed), and movement between fields is easy. As a result, it becomes easy (advantageous) to transport by truck. Further, since the first opening position D1 (seedling dropping position) and the second opening position D2 (seedling dropping position) are located in the front-rear midway portion of the transfer route R1 of the

supply cups

171, 172, that is, the position where the seedlings are dropped. Since there is no seedling in front of the eyes, it becomes easy to supply seedlings to the

supply cups

171 and 172. Further, since the work of the front worker and the work of the rear worker are unified, the replacement of the workers becomes easy.

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

The position adjustment mechanism 230 includes a position adjustment mechanism 230A capable of adjusting the position of the first front chair 187A and a position adjustment mechanism 230B capable of adjusting the position of the second front chair 187B. The structure of the position adjusting mechanism 230A and the structure of the position adjusting mechanism 230B are the same.
As shown in FIG. 43 and FIG. 46, the first position adjusting mechanism 231 of the position adjusting mechanism 230A includes a fixing plate 231a fixed to the second supporting body 152 of the chair supporting body 150, and a fixture for the fixing plate 231a. The movable plate 231b is attached by (bolts 231c and nuts 231d). As shown in FIG. 12, the fixing plate 231 a is fixed to the left portion of the lateral support member 158 of the second support body 152. As shown in FIGS. 46 and 52, the fixed plate 231a is formed with a plurality of through holes 231e arranged in the machine width direction K2. The movable plate 231b also has a plurality of through holes 231f arranged in the machine width direction.

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

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

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

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

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

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

As shown in FIG. 2, between the first front chair 187A and the transplanter 3, a footrest plate 235A on which a worker sitting on the first front chair 187A places his / her foot is provided. Between the second front chair 187B and the transplanter 3, a footrest plate 235B on which the worker sitting on the second front chair 187B rests his foot is provided. The

footrest plates

235A and 235B are rectangular plates in plan view.
The footrest plate 235A is arranged behind and below the first front chair 187A. The footrest plate 235B is arranged behind and below the second front chair 187B. The

footrest plates

235A and 235B are arranged behind and above the elastic pressure device 20 of the rotary cultivator 2. In addition, the footrest plate 235A is arranged above and in front of the connecting bracket 61 (first attachment 61A) of the first machine frame 37A. The footrest plate 235B is arranged above and in front of the connecting bracket 61 (second attachment 61B) of the second machine frame 37B.

As shown in FIGS. 47 and 48, a large number of ribbed holes 236 and a plurality of (four) through holes 237 through which bolts (butterfly bolts) B6 are inserted are formed in the footrest plate 235A. The same applies to the footrest plate 235B.
The

footrest plates

235A and 235B are detachably attached to the chair support 150. Specifically, the

footrest plates

235A and 235B are detachably attached to the

attachment portions

260A and 260B (see FIG. 12) provided on the chair support 150. The attachment portion 260A is a portion to which the footrest plate 235A is attached. The attachment portion 260B is a portion to which the footrest plate 235B is attached. The mounting

portions

260A and 260B are provided on the first support 151 of the chair support 150.

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

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

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

The

footrest plates

235A and 235B may be attached to the chair support 150 so as to be openable and closable. For example, the front portions of the

footrest plates

235A and 235B are attached to the front support member 151a of the first support body 151 via hinges (hinge), or the rear portions of the

footrest plates

235A and 235B are attached via hinges (hinge). It can be attached to the rear support 151b of the first support 151. In the case of this configuration, the

footrest plates

235A and 235B are opened with respect to the chair support 150 to adjust the spring of the elastic device 20 and adjust the distance between the first implantation unit 36A and the second implantation unit 36B. (Structure adjustment) and position adjustment of the irrigation tube can be easily performed.

As shown in FIG. 20 and the like, the first rear chair 187C and the second rear chair 187D are attached to the seat frame 197. The seat frame 197 is a frame to which a chair is attached. Specifically, the first rear chair 187C and the second rear chair 187D are attached to the seat frame 197. The seat frame 197 is vertically movably connected to an attachment body 196 attached to the rotary cultivator 2.

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

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

As shown in FIGS. 20 and 49, the first rear chair 187C is attached to the left part of the third member 203C of the third frame portion 203 via the seat support member 227A. The first rear chair 187C is attached to the seat support member 227A so as to be positionally adjustable in the front-rear direction and the vertical direction. As shown in FIG. 20, a second rear chair 187D is attached to the right part of the third member 203C via a seat support member 227B. The structure of the seat supporting member 227B is similar to that of the seat supporting member 227A. The second rear chair 187D is attached to the seat support member 227B so as to be positionally adjustable in the front-rear direction and the up-down direction. Further, the

seat supporting members

227A and 227B are attached to the third member 203C so as to be positionally adjustable in the machine width direction K2. That is, the

seat support members

227A and 227B have position adjustment mechanisms that can adjust the positions of the first rear chair 187C and the second rear chair 187D in the front-rear direction, the machine width direction, and the vertical direction, respectively. The configuration of this position adjusting mechanism is the position adjusting mechanism 230 (first position adjusting mechanism 231, second position adjusting mechanism 232, third position adjusting mechanism 233) for adjusting the positions of the first front chair 187A and the second front chair 187B. Is the same as.

As shown in FIGS. 20 and 49, a footrest plate 235C on which a worker seated on the first rear chair 187C places his / her foot is arranged in front of and below the first rear chair 187C. A footrest plate 235D on which a worker seated on the second rear chair 187D rests his / her foot is disposed below the front side of the second rear chair 187D. The

footrest plates

235C and 235D are supported on the frame body 199 of the seat frame 197. Specifically, the

footrest plates

235C and 235D are supported on the third member 203C of the third frame portion 203.

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

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

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

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

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

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

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

A seedling tray having a large number of seedlings can be placed on the seedling supply bases 188A to 188D. The operator can supply seedlings to the

supply cups

171 and 172 of the seedling supply device 38 from the seedling trays placed on the seedling supply bases 188A to 188D.
First, the configurations of the seedling supply tables 188A and 188B will be described.
As shown in FIG. 12, the

seedling supply bases

188A and 188B are attached to a position adjusting mechanism 230 that supports the front chair in a positionally adjustable manner. Specifically, the seedling supply table 188A is attached to the position adjusting mechanism 230 that supports the first front chair 187A. The seedling supply table 188B is attached to the position adjusting mechanism 230 that supports the second front chair 187B. The seedling supply table 188A and the seedling supply table 188B are symmetrically arranged with the center line of the working machine 1 in the machine width direction K2 interposed therebetween. Except for this configuration (symmetrical configuration), the seedling supply base 188A and the seedling supply base 188B have the same configuration.

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

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

As shown in FIGS. 50 to 53, the seedling supply table 188A is rotatably supported by the rotation support mechanism 273. The seedling supply table 188A has a placing portion 191 on which a seedling tray can be placed, and a support structure 192 that supports the placing portion 191. The support structure 192 includes bending

members

193F and 193B and a bar member 194. The bending

members

193F and 193B are bent in an obtuse V shape at an intermediate portion between one end and the other end. Hereinafter, the portion between one end of the

bending members

193F and 193B and the middle portion (bending portion) is referred to as "one end side portion", and the other end of the

bending members

193F and 193B and the middle portion (bending portion). Is referred to as "the other end side part".

One end of the bending member 193F is attached to the front part of the support shaft 275. One end of the bending member 193B is attached to the front part of the support shaft 275. The rod 194 is provided at one end side portion of the

bending members

193F and 193B. The bar 194 extends in the front-rear direction across the bending

members

193F and 193B. A second locking portion 194a, on which the other end of the spring 276 is locked, is provided at one end of the rod 194.

The mounting portion 191 is provided on the other end side portion of the

bending members

193F and 193B. The mounting portion 191 has a plurality of (two) receiving members 191a extending in the front-rear direction across the bending

members

193F and 193B, and a square annular receiving frame 191b attached to the receiving members 191a. There is. The receiving material 191a and the receiving frame 191b constitute a substantially rectangular seedling placing surface that supports the bottom surface of the seedling tray.

As shown in FIGS. 50 to 52, the bending

members

193F and 193B can rotate around the support shaft 275. The rotation range of the

bending members

193F and 193B is regulated by the regulation plate 274c.
When the

bending members

193F and 193B are rotated outward in the machine width direction, the rod member 194 comes into contact with the outward protruding portion 274c1 of the regulation plate 274c, and further rotation is impossible. In this state, the seedling supply table 188A is in the first posture in which the seedling placing surface faces the horizontal direction. When the

bending members

193F and 193B are rotated inward in the machine width direction, the bar member 194 comes into contact with the inward protruding portion 274c2 of the regulation plate 274c, and further rotation is impossible. In this state, the seedling supply table 188A is in the second posture in which the seedling placing surface faces the vertical direction. The second posture includes a case where the seedling placing surface faces a vertical direction (vertical direction) and a case where the seedling placing surface faces a direction slightly inclined with respect to the vertical direction.

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

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

supply cups

171 and 172 of the first seedling supply device 38A.

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

seedling supply bases

188A and 188B.

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

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

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

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

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

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

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

supply cups

171 and 172 located in front of the worker who is seated in each chair.

As shown in FIG. 21, the seedling placing table 190 is attached on a table receiver 189 provided in the connecting frame 130 that connects the first transplanting unit 36A and the second transplanting unit 36B. The pedestal support 189 is provided on the fifth connection frame member 135. The stand 189 is arranged above the first seedling supply device 38A and the second seedling supply device 38B.
The operator can supply the seedlings from the seedling tray on the seedling placing table 190 to the

supply cups

171 and 172. Since the seedling placing table 190 is arranged so as to straddle over the first seedling feeding device 38A and the second seedling feeding device 38B, the first front chair 187A, the second front chair 187B, and the first rear chair. An operator seated in each of the chairs 187C and the second rear chair 187D can take the seedlings from the seedling tray on the seedling placing table 190. That is, the seedling placing table 190 is arranged at a position where an operator sitting on each chair can take the seedlings from the seedling tray on the seedling placing table 190.

The worker can supply the seedlings on the seedling tray on the seedling mounting table 190 to the

supply cups

171 and 172 when the seedlings on the seedling supplying table 188 are exhausted. That is, the seedling placing table 190 is a table on which a spare seedling tray is placed. Further, when the seedling tray on the seedling supply table 188 is exhausted, the empty seedling tray may be replaced with the seedling tray on the seedling placing table 190. Further, the seedling placing base 190 may be a common seedling supplying base for each worker without providing the seedling supplying base 188 located in front of each worker.

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

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

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

The right end portion (the end portion on the inner side in the machine width) of the first roll support shaft 301 is located to the right of the center of the multi-film laying apparatus 300 in the machine width direction K2. The right end of the first roll support shaft 301 is located to the right of the left end of the second roll support shaft 302 and the left end of the second film roll 304.
The left end portion (the end portion on the inner side in the machine width) of the second roll support shaft 302 is located to the left of the center of the multi-film laying apparatus 300 in the machine width direction K2. Further, it is located to the left of the right end of the first roll support shaft 301 and the right end of the first film roll 303.

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

Both ends of the first roll support shaft 301 are supported by the first

shaft support bodies

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

As shown in FIGS. 58 to 60, the first shaft support body 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 from the lower portion to the machine width outside (left side). One end (front end) of the fifth support member 311 is connected to the outer end of the fourth support member 310 in the machine width direction via a support shaft 312. The fifth support member 311 can swing upward or downward around the support shaft 312. The other end (rear end) of the fifth support member 311 is provided with a recessed engagement portion 311a that is cut out from above to below, and the engagement portion 311a has a first roll support shaft. One end (left end) of 301 is locked. A cover plate 339 for preventing detachment of one end of the first roll support shaft 301 locked to the locking portion 311a is fixed by a bolt or the like above the locking portion 311a. As a result, one end portion (left end portion) of the first roll support shaft 301 is supported by the first shaft support body 305L.

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

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

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

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

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

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

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

The first soil cover member 321 and the second soil cover 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, it is sufficient that one of the first soil cover member 321 and the second soil cover member 322 is disposed behind the other soil cover member. Which of the first soil cover member 321 and the second soil cover member 322 is arranged rearward can be determined by the front-rear relationship between the first roll support shaft 301 and the second roll support shaft 302. Specifically, when the second roll support shaft 302 is arranged behind the first roll support shaft 301, the second soil covering member 322 is arranged behind the first soil covering member 321. When the first roll support shaft 301 is arranged behind the second roll support shaft 302, the first soil covering member 321 is arranged behind the second soil covering member 322.

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

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

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

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

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

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

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

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

The working machine 1 of the present embodiment has the following effects.
The working machine 1 includes a first ground work machine 2 mounted on the rear part of the traveling body 1A, a second ground work machine 3 mounted on the rear part of the first ground work machine 2 and planting seedlings in a field, and a first ground work machine. Chairs (first front chair 187A and second front chair 187B), which are arranged above the working machine 2 and for working on the second ground working machine 3, and a chair 187A for the second

ground working machine

3 , 187B, and a position adjusting mechanism 230 that can adjust the positions of the 187B.

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

With this configuration, the first position adjustment mechanism 231 can adjust the positions of the

chairs

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

chairs

187A and 187B in the front-rear direction in accordance with the physique of the worker.

Further, the position adjusting mechanism 230 has a third position adjusting mechanism 233 capable of adjusting the positions of the chairs (first front chair 187A, second front chair 187B) in the vertical direction.
According to this configuration, the third position adjusting mechanism 233 allows the

chairs

187A, 187B to correspond to the ridge height, the height of the sleeve (the sleeve fitted in the supply cups 171 and 172), the physique of the worker, and the like. The position can be adjusted vertically.

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

According to this configuration, the positions of the

chairs

187A and 187B are adjusted by the position adjusting mechanism 230 while keeping the relationship between the height of the

chairs

187A and 187B on which the worker sits and the height of the second ground work machine 3 constant. You can Therefore, the positions of the

chairs

187A and 187B with respect to the second ground work implement 3 can be adjusted accurately and easily.
Further, the working machine 1 is arranged between the chairs (first front chair 187A, second front chair 187B) and the second ground working machine 3 and is mounted on the chairs (first front chair 187A, second front chair 187B). It is provided with

footrest plates

235A and 235B on which the seated worker puts his / her feet, and the chair support 150 has

attachment parts

260A and 260B to which the

footrest plates

235A and 235B are detachably or removably attached.

According to this configuration, by removing or opening the

footrest plates

235A, 235B with respect to the mounting

portions

260A, 260B, it becomes easy to access the

footrest plates

235A, 235B below. Therefore, for example, adjustment of the spring of the elastic pressure device 20 of the rotary cultivator 2, adjustment of the distance between the first transplantation unit 36A and the second transplantation unit 36B (spacing adjustment), position adjustment of the irrigation tube, etc. are facilitated. It can be carried out.

Further, the working machine 1 is a seedling supply device 38 that transfers a large number of

supply cups

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

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

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

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

According to this configuration, as compared with the case where the support frame 82 is disposed laterally of the detection member 83, the adjacent detection members 83 (for example, the

earth covering wheels

81L and 81R of the left first earth covering device 40AL, and the right The interval between the soil-covering

wheels

81L and 81R of the first soil-covering device 40AR can be narrowed. Therefore, it is possible to reduce the distance between the seedlings for planting while avoiding the interference between the support frames 82.

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

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

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

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

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

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

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

According to this configuration, the length of the main shaft 107 can be easily adjusted corresponding to the adjustment of the distance between the first transplantation unit 36A and the second transplantation unit 36B, and at the same time, the first transplantation unit 36A. Also, the power can be reliably transmitted to the second transplantation unit 36B.
Further, the working machine 1 includes a traveling body 1A, a rotary cultivator 2 attached to a rear portion of the traveling body 1A, and a ridger 51 having an attachment portion attached to the rotary cultivator 2, and the attachment portion is The front mounting portions 51La, 51Ra, 51Ma provided at the front portion of the ridger 51 and the rear mounting portions 51Lb, 51Rb, 51Mb provided at the rear portion of the ridger 51 are included.

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

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

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

Further, the rotary cover 19 has an upper cover 19A that covers the upper part of the tilling part 18, a rear cover 19B that covers the rear of the tilling part 18, and a side cover 19C that covers the sides of the tilling part 18, and the transmission. The case 12 is arranged at the center in the width direction of the rotary cultivator 2, and the ridge former 51 includes

side ridge formers

51L and 51R in which front attachment portions 51La and 51Ra are attached to the side cover 19C, and front attachment portions. The portion 51Ma includes an intermediate ridger 51M attached to the transmission case 12.

With this configuration, the

side ridge risers

51L and 51R and the intermediate ridge riser 51M can be reliably attached to the rotary cultivator 2 at different positions in the width direction.
Further, the outer ends in the width direction of the

side ridge risers

51L and 51R are positioned outside the outer ends in the width direction of the side cover 19C.
According to this structure, since the distance between the

side ridger

51L, 51R and the intermediate ridger 51M can be increased, the ridge width can be widened.

The side cover 19C includes a first side cover 19CL arranged on one side in the width direction and a second side cover 19CR arranged on the other side in the width direction, and has a mounting body 196. Is between the first side member 196A attached to the first side cover 19CL, the second side member 196B attached to the second side cover 19CR, and the first side member 196A and the second side member 196B. And the intermediate member 196C disposed on the

side ridges

51L and 51R, and the

side ridges

51L and 51R are arranged on one side in the width direction and on the other side in the width direction. The rear mounting portion 51Lb including the arranged second side ridger 51R and the first side ridger 51L is attached to the first side member 196A, and the rear side ridger 51R is attached. The mounting portion 51Rb is attached to the second side member 196B. Is, the attachment portion 51Mb after the intermediate ribbing devices 51M is attached to the intermediate member 196C.

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

According to this configuration, even in a field in which pre-cultivation is not sufficiently performed, it is possible to surely form the ridges by the ridger 51 and plant seedlings in the ridges formed by the transplanter 3.
Further, the multi-film laying device 300 is a multi-film laying device which is mounted on the rear side of the traveling body 1A and lays a multi-film on a ridge formed in a field, and the multi-film laying device is laid on the first ridge UN1. The second film roll 304 around which the multi-film laid on the first roll supporting shaft 301 that supports the first film roll 303 wound around and the second ridge UN2 adjacent to the first ridge UN1 is wound. And a second roll support shaft 302 for supporting the first roll support shaft 301 and the second roll support shaft 302. ing.

According to this configuration, the interval between the first film roll 303 and the second film roll 304 can be narrowed, so that the ridges can be narrowed between two adjacent ridges and a multi-film can be laid. Therefore, the mulch film can be satisfactorily laid even in a field where a large number of ridges are formed at narrow intervals.
Further, the first roll support shaft 301 and the second roll support shaft 302 are arranged so as to be displaced in the front-rear direction.

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

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

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

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

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

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

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

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

1 Working Machine 1A Traveling Body 2 Rotary Tiller 3 Transplanter 11 Rotary Machine Frame 12 Transmission Case 18 Tiller 19 Rotary Cover

19A Upper Cover

19B Rear Cover 19C Side Cover 19CL First Side Cover 19CR Second Side Cover 51 Ridge Stand 51L Side ridge stand (first side ridge stand)
51R Side ridger (2nd side ridger)
51M Intermediate ridger 51La Front mounting part 51Ra Front mounting part 51Ma Front mounting part 51Lb Rear mounting part 51Rb Rear mounting part 51Mb Rear mounting part 196 Mounting body 196A First side member 196B Second side member 196C Intermediate member 300 Multi film laying device 303 First film roll 301 First roll support shaft 304 Second film roll 302 Second roll support shaft 321 First soil cover member 322 Second soil cover member 331 First film retainer 332 Second film retainer UN1 First ridge UN2 Second ridge

Claims

A multi-film laying device mounted on the back of a traveling body and laying a multi-film on a ridge formed in a field,
A first roll support shaft that supports a first film roll around which a multi-film laid on the first ridge is wound;
A second roll support shaft for supporting a second film roll around which a multi-film is laid, which is laid on a second ridge adjacent to the first ridge,
Equipped with
A multi-film laying device in which the first roll support shaft and the second roll support shaft extend in the width direction of the traveling body and overlap in the width direction.
The multi-film laying device according to claim 1, wherein the first roll support shaft and the second roll support shaft are arranged so as to be displaced in the front-rear direction.
The multi-film laying device according to claim 1, wherein the first roll support shaft and the second roll support shaft are arranged so as to be vertically offset from each other.
A first soil covering member for covering the end portion on the second ridge side of the mulch film laid on the first ridge with soil;
A second soil covering member for covering the end on the first ridge side of the mulch film laid on the second ridge with soil;
Equipped with
The mulch film laying apparatus according to any one of claims 1 to 3, wherein the first soil covering member and the second soil covering member are arranged so as to be displaced in the front-rear direction.
The multi-film laying device according to claim 4, wherein the first soil covering member and the second soil covering member are arranged so as to overlap each other in the width direction.
One of the first soil cover member and the second soil cover member is disposed behind the other soil cover member,
The multi-film laying device according to claim 5, wherein a lower end portion of the one soil covering member is located below a lower end portion of the other soil covering member.
A first film retainer for pressing an end of the multi-film laid on the first ridge on the second ridge side;
A second film retainer for pressing the end of the multi-film laid on the second ridge on the first ridge side;
Equipped with
7. The multi-film laying device according to claim 1, wherein the first film retainer and the second film retainer are arranged so as to be displaced in the front-rear direction.
A mulch film laying apparatus according to any one of claims 1 to 7,
A transplanter that is attached to the rear of the running body, and that implants seedlings in the ridges,
A working machine equipped with.
A moving body,
A rotary cultivator attached to the rear part of the traveling body,
A ridger having an attachment portion attached to the rotary cultivator,
Equipped with
The said mounting part is a working machine including the front mounting part provided in the front part of the said ridger, and the rear mounting part provided in the rear part of the said ridger.
The rotary cultivator includes a cultivating section for cultivating a field, a rotary machine frame, a rotary cover attached to the rotary machine frame to cover the cultivating section, and a transmission that houses a transmission mechanism for transmitting power to the cultivating section. Has a case,
An attachment is attached to the rotary machine frame,
The front attachment portion is attached to the rotary cover or the transmission case,
The working machine according to claim 9, wherein the rear attachment portion is attached to the attachment body.
The rotary cover has an upper cover that covers an upper part of the cultivating part, a rear cover that covers a rear part of the cultivating part, and a side cover that covers a lateral side of the cultivating part,
The transmission case is arranged at the center in the width direction of the rotary cultivator,
11. The ridger includes a side ridger in which the front attachment portion is attached to the side cover, and an intermediate ridger in which the front attachment portion is attached to the transmission case. Working machine.
The working machine according to claim 11, wherein an outer end portion in the width direction of the side ridger is positioned outside an outer end portion in the width direction of the side cover.
The side cover includes a first side cover arranged on one side in the width direction and a second side cover arranged on the other side in the width direction,
The attachment body includes a first side member attached to the first side cover, a second side member attached to the second side cover, the first side member and the second side member. An intermediate member disposed between,
The side ridger includes a first side ridger arranged on one side in the width direction and a second side ridger arranged on the other side in the width direction,
The rear attachment portion of the first side ridger is attached to the first side member,
The rear attachment portion of the second side ridger is attached to the second side member,
The working machine according to claim 11 or 12, wherein the rear attachment portion of the intermediate ridger is attached to the intermediate member.
Equipped with a transplanter which is mounted on the rear part of the rotary tiller and which plant seedlings in a field,
The ridger is disposed in front of the transplanter,
The working machine according to any one of claims 9 to 13, wherein the transplanting machine implants a seedling in a ridge formed by the ridger.