JP2018000063A - Work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work machine capable of molding a ridge excellently.SOLUTION: A work machine 1 works while moving along an excavated groove T1 formed in a field F1 and filled with soil. The work machine includes: a tillage device 4 including a tillage part 9 tilling the field F1; a ridge molding tool 34 arranged in a rear part of the tillage part 9 and erecting a ridge R1 above the excavated groove T1 with soil tilled with the tillage part 9; and a suppression tool 47 including a suppression part 48 suppressing the soil within the excavated groove T1 and arranged between front/rear edges of the tillage part 9.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a working machine that performs plowing and raising along a excavation groove filled with soil in a series of operations.

Conventionally, a technique disclosed in Patent Document 1 is known as a working machine.
The working machine disclosed in Patent Document 1 includes a cultivating device for cultivating a field, a cocoon forming device for forming cocoons with the cultivated soil, and a seeding device for sowing crop seeds in the formed cocoons. Yes. This working machine is attached to the rear part of the tractor and works while moving along a trencher groove (a groove dug by a trencher and filled with soil) formed in a farm field. That is, the working machine plows while moving along the trencher groove, raises a ridge on the trencher groove, and seeds the trencher directly above the trencher groove. In addition, when seeding directly on the trencher groove, the seedling device is equipped with a tiller device and a ridge forming device, and is sown on the trencher groove by a working machine not equipped with a seeding device, and then seeded in the seeder by the seeding device. There is also.

  The working machine of patent document 1 is provided with the pressure suppression tool which suppresses the soil in a trencher groove. The pressure suppression tool is arrange | positioned in the back of a tilling part and the front of a ridge forming machine.

Japanese Patent Laying-Open No. 2006-2052

In the working machine of Patent Document 1, the soil in the field is cultivated by the tilling device, and the ridge forming device disposed behind the cultivating device forms the cocoon by the cultivated soil. If there is a pressure suppressor in front of the dredger, the flow of the soil cultivated by the pressure suppressor may be disturbed, which may affect the formation of the dredger.
Then, an object of this invention is to provide the working machine which can perform shaping | molding of a cage | basket favorably.

  The working machine is a working machine that performs work while moving along an excavation groove that is formed in a farm field and filled with soil, and includes a tilling device that has a tilling section that plows the farm field, A ridge forming device for setting a ridge on the excavation groove with the soil that is disposed rearward and cultivated by the tillage unit, and a pressure reducing unit that crushes the soil in the excavation groove, at the front and rear ends of the tillage unit And a pressure suppression device having a pressure suppression unit disposed therebetween.

Moreover, the said suppression part is arrange | positioned below the said tilling part.
Further, the tilling device is a center drive type rotary tilling device having a transmission case at a central portion in the body width direction, and the pressure reducing portion is disposed below the transmission case.
Moreover, the said pressure suppression tool has the extension part extended in the inclination direction which transfers upwards as it goes ahead from the said pressure suppression part.

The working machine is a search guide that is inserted into the excavation groove to make the central portions in the width direction of the excavation groove and the rod coincide with each other, and is guided by one groove wall of the excavation groove. And a second guide plate guided by the other groove wall of the excavation groove, and a search guide having a space between the first guide plate and the second guide plate.
In addition, the work implement is capable of changing its position between a first position where the pressure-reducing part reduces the soil in the excavation groove and a second position where the pressure-reducing part is located above the lower end of the tillage part. Is provided with a support device.

The working machine is a search guide that is inserted into the excavation groove to make the central portions in the width direction of the excavation groove and the rod coincide with each other, and is fixed to the pressure suppressor and places the pressure suppressor in the second position. A search guide is provided above the lower end of the tillage part when the position is changed.
The support device is pivotally attached to the rear portion of the pressure suppressor and supported by the tillage device so as to be vertically movable, and pivotally supports the front portion of the pressure suppressor and is attached to the tillage device. A second support member.

Further, the tilling device is a center drive type rotary tilling device having a transmission case for transmitting power to the tilling unit in a central portion in the body width direction, and the pressure reducing unit is disposed below the transmission case, The first support member is disposed behind the transmission case, and the second support member pivotally supports the pressure suppressor on the front side of the transmission case.
Further, the work machine includes a soil-removing member that is disposed in front of the pressure-reducing portion and removes the soil on the surface side of the soil in the excavation groove to the side of the excavation groove.

  The working machine includes a tilling device having a tilling unit for tilling a field, a tiller that is placed behind the tilling unit and is cultivated by the tilling unit, and stands on the excavating groove, and in the excavating groove And a pressure suppression tool having a pressure suppression portion disposed between the front and rear ends of the tillage portion. According to this, since the compaction part is located between the front and rear ends of the tillage part, the compaction tool does not hinder the flow of the soil cultivated by the tillage part, and can be formed satisfactorily.

It is a side view of a working machine. It is a back perspective view of a working machine. It is side surface sectional drawing of a tillage apparatus. It is a front view which shows the relationship between a tillage part and a suppression tool. It is a bottom view which shows the relationship between a tillage part and a pressure suppression tool. It is a front view of the attachment part of an earth-proof member. It is a rear view which shows the relationship between a ridge, a trencher groove | channel, a suppression part, and a search guide. It is a side view which shows the excavation part and tractor of a trencher, and a working machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 8 shows a tractor (traveling vehicle) 1 and a work machine 2 that is attached to the tractor 1 and works while moving in a field. The work machine 2 is mounted on the tractor 1 via a mounting mechanism such as a three-point link mechanism 3. Further, the work machine 2 includes a tilling device 4, a cocoon forming device 5, and a seeding device (antipod working unit) 6. That is, the work machine 2 is a machine that performs tilling, tapping, and sowing in one step.

  A digging groove T1 filled with soil is formed in the field. The excavation groove T1 is a trencher groove dug in the field in advance by the excavation unit 7 of the trencher (groove machine). The tractor 1 travels across the trencher groove T1. The work implement 2 is cultivated by the cultivator 4 while moving along the trencher groove T1, and formed the ridge R1 on the trencher groove T1 by the ridge forming apparatus 5 and seeded the crop with the seeding apparatus 6 on the formed ridge R1. Sowing. That is, the work machine 2 is a work machine 2 that performs work while moving along the trencher groove T1 (excavation groove filled with soil). The seeds of the crop to be sown are seeds of crops that grow in the depth direction of the trencher groove T1, and are, for example, root vegetables such as burdock and long potatoes. In addition, the working machine 2 does not need to be provided with the sowing apparatus 6, and sowing may be performed in a separate process after the cocoon R1 is formed in the field. In addition, the work machine 2 may include an opposing work unit other than the seeding device 6. The counter work unit may be, for example, a planting device for planting seedlings in the cocoon R1, a fertilizer supply device that supplies fertilizer to the cocoon R1, a medicine supply device that supplies medicine to the cocoon R1, and the like.

FIG. 1 is a side view of the work machine 2. FIG. 2 is a rear perspective view of the work machine 2. FIG. 8 is a side view showing a state where the work machine 2 is mounted on the tractor 1 to perform the work. In the following embodiments, the direction of arrow A1 in FIGS. 1 and 8 will be described as the front (the forward direction of the tractor 1), and the direction of arrow A2 in FIGS. 1 and 8 will be described as the rear (the reverse direction of the tractor 1). Therefore, the front side of FIGS. 1 and 8 is the left side, and the back side of FIGS. 1 and 8 is the right side. Further, the horizontal direction orthogonal to the front-rear direction will be described as the body width direction (see the arrow X1 direction in FIG. 2). The direction from the center of the machine body width direction X1 of the work machine 2 toward the right part or the left part will be described as the outside of the machine body. In other words, the outside of the machine body is the machine body width direction X1 and the direction away from the center of the work machine 2. The direction opposite to the outside of the aircraft will be described as the inside of the aircraft. In other words, the in-flight direction is the aircraft width direction X1
In this direction, the center of the work machine 2 is approached.

In FIG. 1, the solid line D1 indicates the surface of the field F1, the alternate long and short dash line D2 indicates the tilling depth, and the alternate long and short dash line D3 indicates the pressure suppression depth of the pressure suppression tool described later.
As shown in FIG. 1, the work machine 2 includes a tilling device 4 at the front and a straw forming device 5 and a seeding device 6 at the rear. In the work machine 2, the center part in the machine body width direction X <b> 1 (hereinafter, also simply referred to as the width direction center part) coincides with the center part in the lateral direction of the tractor 1 (horizontal direction orthogonal to the front and rear directions of the tractor 1). To be fitted.

As shown in FIGS. 1 to 3, the tillage device 4 is constituted by a center drive type rotary tiller in the present embodiment. In other words, the tilling device 4 is a center drive type rotary tilling device having a transmission case 12 for transmitting power to the tilling portion at the center in the width direction.
The tilling device 4 includes a machine frame 8, a tilling unit 9 that tills the field, and a tilling cover 10 that covers the tilling unit 9. The machine frame 8 is attached to the rear portion of the tractor 1 by the three-point link mechanism 3.

  As shown in FIG. 1, the machine casing 8 includes a gear case 11 located in the center in the width direction, a transmission case 12 protruding downward from the gear case 11, a support arm 13 </ b> L protruding leftward from the gear case 11, A support arm 13R that protrudes rightward from the gear case 11 and a top mast 14 that protrudes upward from the gear case 11 are provided. The lower part (lower surface) of the transmission case 12 is formed in a curved shape (arc shape with the rotation center C1 of the tillage part 9 as a center) that is convex downward in a side view.

  As shown in FIG. 1, the tilling unit 9 is provided at the lower part of the transmission case 12 (lower part of the machine casing 8). As shown in FIGS. 1 and 4 (front view), the tilling unit 9 includes a first rotating shaft 15 that protrudes leftward from the lower part of the transmission case 12 and a second protrusion that protrudes rightward from the lower part of the transmission case 12. The rotating shaft 16 includes a plurality of (many) tilling claws 17 attached on the first rotating shaft 15 and the second rotating shaft 16. The axis of the first rotating shaft 15 and the second rotating shaft 16 is the rotation center C1 of the tillage unit 9.

  A gear transmission mechanism is provided in the gear case 11. A driving force from the PTO shaft of the tractor 1 is input to this gear transmission mechanism. The driving force transmitted to the gear transmission mechanism is transmitted to the first rotary shaft 15 and the second rotary shaft 16 via a chain transmission mechanism provided in the transmission case 12. The driving force transmitted to the first rotating shaft 15 and the second rotating shaft 16 causes the first rotating shaft 15 and the second rotating shaft 16 to rotate about the axis in the body width direction X1. As the first rotating shaft 15 and the second rotating shaft 16 rotate, the tilling claws 17 plow and reverse the soil and crush the soil. The tilling unit 9 (the first rotating shaft 15, the second rotating shaft 16, and the tilling claw 17) rotates in the direction of the arrow Y1 in FIG. 1, and the tilling claw 17 rotates and cuts downward with respect to the soil for downcut tilling. . Moreover, the soil cultivated by the tilling claws 17 is released to the rear.

The central portion in the width direction of the tilling device 4 is the central portion in the width direction of the work machine 2. When working with the work implement 2, the trencher groove T <b> 1 is positioned below the gear case 11 located at the center in the width direction of the tilling device 4. The cultivating unit 9 cultivates the left side and the right side of the trencher groove T1.
As shown in FIGS. 2 and 3, the tilling cover 10 is a member that covers the top of the tilling portion 9 and is formed of an arc-shaped plate body in a side view. The tillage cover 10 is provided on the left and right of the transmission case 12, and is attached to the machine frame 8 by an attachment device 18. The space between the tilling covers 10 is closed by a central cover 20 supported by the gear case 11 via a stay member. The attachment device 18 is capable of rotating the tilling cover 10 with respect to the machine frame 8 around the rotation center C1 (the axes of the first rotation shaft 15 and the second rotation shaft 16) and fixing at an arbitrary rotation position. Install as possible.

The mounting device 18 includes a fixed bracket 21 fixed to the left and right support arms 13L and 13R, a movable bracket 22 fixed to the upper surface of the tillage cover 10, and a bolt that connects the fixed bracket 21 and the movable bracket 22 together. 23.
Each movable bracket 22 has an arc-shaped long hole 24 formed at the front and rear. The long hole 24 has an arc shape centered on the rotation center C1. The movable bracket 22 is coupled to the fixed bracket 21 by screwing the bolts 23 into the screw holes formed in the fixed bracket 21 through the long holes 24. Further, by loosening the fastening by the bolt 23, the tillage cover 10 can be rotated around the rotation center C1 together with the movable bracket 22 with respect to the machine frame 8. Further, by tightening the bolt 23, the tillage cover 10 is fixed to the machine frame 8 at an arbitrary rotation position.

  The movable bracket 22 extends rearward, and a support frame 25 is fixed to the extended portion. To this support frame 25, the cocoon forming device 5 and the seeding device 6 are attached. Therefore, by rotating the tillage cover 10 together with the movable bracket 22, the tillage cover 10, the support frame 25, the straw forming device 5, and the seeding device 6 can be adjusted in angle with respect to the machine frame 8 around the rotation center C <b> 1. Has been. Thereby, even when the tilling depth of the tilling portion 9 is changed by adjusting the height of the gauge rings 26L and 26R described later, it is possible to support the tack forming device 5 substantially horizontally by adjusting the mounting device 18. Become. In addition, it is possible to keep the seeding position by the seeding device 6 at a predetermined height.

As shown in FIGS. 1, 2, and 3, the support frame 25 includes a toolbar 27 arranged in the body width direction X <b> 1, left and right frames 28 projecting downward from the toolbar 27, and the toolbar 27. And a support 29 protruding rearward.
The toolbar 27 is constituted by a square pipe or the like, and is connected to the rear ends of the left and right movable brackets 22 by welding or the like.

The frame body 28 is a member protruding downward from the tool bar 27 and protrudes downward from the vicinity of the rear end of each of the left and right movable brackets 22. At the lower end of each frame body 28, the scissors forming device of the scissor forming device 5 is fixed. The frame body 28 may be fixed to the rear ends of the left and right movable brackets 22.
The support 29 is a plate that protrudes rearward from the vicinity of the central portion in the width direction of the tool bar 27. A support column 30 of the seeding device 6 is attached to the middle of the support 29.

As shown in FIG. 1 and FIG. 2, the dredger forming device 5 is arranged on the trencher groove T <b> 1 (excavation groove) with the soil (cultivated soil) disposed behind the tiller unit 9 and cultivated by the tiller unit 9. Raise R1.
The cocoon forming device 5 includes an upper plate 31 that protrudes rearward from the rear portion of the cultivation cover 10, an extended plate 32 that extends downward from the upper plate 31, and cultivation soil that is radiated rearward from the cultivation portion 9. It has the guide plate 33 guided to the width direction center part side, and the scissors molding machine 34 located in the width direction center part and extended back from the guide plate 33. As shown in FIG.

  As shown in FIGS. 1, 2, and 3, the upper plate 31 is a flat plate member that extends substantially horizontally from the rear end of the tillage cover 10 to the rear, and has a width that increases toward the rear in plan view. The shape is narrow. The extended plate 32 has an upper wall 32a fixed to the center in the width direction of the upper plate 31, and an extended wall 32b extending downward from the rear end of the upper wall 32a. Below the extension wall 32b is a ridge opening 35 through which the soil cultivated by the cultivator 9 passes to the culverter 34. The guide plates 33 are provided on the left and right sides of the upright opening 35, and the tilled soil released from the tiller 9 is gathered at the upright opening 35 and guided to the rear vertical shaper 34.

As shown in FIGS. 1 and 2, the saddle former 34 is provided at the top plate 36 extending rearward from the upright opening 35, the side plate 37 </ b> L provided at the left end of the top plate 36, and the right end of the top plate 36. Side plate 37R.
The top plate 36 has a front end located above the erecting port 35 and is pivotally supported by the frame 28 so as to be rotatable about an axis in the body width direction X1. The top plate 36 is arranged so as to be gradually lowered toward the rear. A lowering device 38 is provided across the rear part of the top plate 36 and the rear part of the support 29. The lowering device 38 has a spring 39, and the rear portion of the top plate 36 is urged downward by the elastic force of the spring 39. The top plate 36 forms the upper surface R2 of the bowl R1.

Each of the side plates 37L and 37R is a plate material attached along the side edge of the erecting port 35 and the side edge of the top plate 36. The left and right side plates 37L and 37R are provided in an inclined shape so as to move outward as the vehicle goes downward in the rear view. A side surface R3 of the ridge R1 is formed by the soil along the side plates 37L and 37R.
As described above, the tilled soil passes through the paddle forming unit 34 to form the paddle R1 having a substantially trapezoidal cross section.

The ridge former 34 is provided such that the central portion in the width direction substantially coincides with the central portion in the width direction of the tilling device 4. Accordingly, by aligning the central portion in the width direction of the tilling device 4 (working machine 2) with the trencher groove T1, the cage forming unit 34 stands the cage R1 on (above) the trencher groove T1 (excavation groove).
As shown in FIGS. 1 and 2, the seeding device 6 guides the rolled seeder tape 40 and the roll holder 42 that rotatably supports the seeder roll 40 </ b> A around which the seeder tape 40 (seed string) is wound. And a tape guide 41.

The seeder tape 40 is a tape in which seeds are enclosed at a predetermined interval in a water-soluble string-like tape.
The roll holder 42 has a support column 30 that extends upward from the middle part of the support 29 of the tool bar 27. A seeder roll 40 </ b> A is provided on the upper portion of the column 30. Further, the roll holder 42 has a cover body 43 that covers the seeder roll 40A from above.

  The tape guide portion 41 is a cylindrical body that penetrates the center portion in the width direction of the front portion of the top plate 36 of the bowl forming device 34. The tape guide part 41 has a tape inlet 41a opened upward at the upper end. The seeder tape 40 is inserted into the tape guide 41 from the tape inlet 41a. A lower portion of the tape guide portion 41 is bent rearward under the top plate 36. The rear end of the lower part of the tape guide 41 is a tape outlet 41b that opens rearward. The seeder tape 40 is inserted from the tape outlet 41b. Moreover, the tape guide part 41 is attached to the support cylinder 44 fixed to the upper plate 31 of the scissors molding machine 34 so that height adjustment is possible.

  As shown in FIG. 1, as the work machine 2 moves forward, the seeder tape 40 is unwound from the seeder roll 40A. The unwound seeder tape 40 passes through the tape guide 41 and is inserted into the flange R1 from the tape outlet 41b. Thereby, as shown in FIG. 1, the seeder tape 40 is embedded in the ridge R1 at a set depth and substantially horizontally. Thereby, as shown in FIG. 7, the seed S2 of the crop is sown on the cocoon R1 at the set depth.

On the left side of the ridge former 34, a gauge ring 26L (gauge member) that rolls on the left side of the ridge R1 is disposed. On the right side of the ridge former 34, a gauge ring 26R (gauge member) that rolls on the right side of the ridge R1 is disposed. The tilling depth of the tilling part 9 is determined by the gauge rings 26L and 26R.
As shown in FIGS. 1 and 2, each gauge ring 26 </ b> L, 26 </ b> R is supported by a support frame 45. The support frame 45 is attached to the middle part of each support arm 13L, 13R so as to be swingable up and down. The support frame 45 is supported by a height adjusting mechanism 46 provided across the support frame 45 and the top mast 14 so that the vertical position can be adjusted. The height adjustment mechanism 46 can adjust the height (plowing depth) of the gauge wheels 26L and 26R.

  The work machine 2 moves the tractor 1 forward along the trencher groove T1 by positioning the trencher groove T1 at the center in the width direction of the tractor 1 to be mounted. The cultivator 4 releases the cultivated soil backward. The released tilled soil is collected in the center in the width direction by the guide plate 33 located behind the tilled portion 9, and the soil passes through the cage forming unit 34 so that it is placed on (above) the trencher groove T1. R1 is raised. At the same time as the heeling, the seeder tape 40 released from the tape guide portion 41 of the seeding device 6 is embedded at a predetermined depth in the center portion in the heel width direction (center portion in the machine body width direction X1) in the heel R1. The Thereby, seeds are sown on the cocoon R1 at regular intervals in the longitudinal direction.

  By the way, in a clay-like field (a field where the soil block is difficult to collapse), a large soil block is likely to occur. For this reason, the soil filled back in the trencher groove T1 may not be densely packed in the trencher groove T1, and a cavity may be formed. If there is a cavity in the soil in the trencher groove T1, the root vegetables have a property such that the growth stops or becomes bifurcated when reaching the cavity, and the cavity affects the growth of the crop.

As shown in FIGS. 1 and 3 to 5, the work machine 2 includes a pressure suppression tool 47 that suppresses soil in the trencher groove T <b> 1 (excavation groove). By compressing the soil in the trencher groove T1 by the pressure suppressor 47, the cavity generated in the soil in the trencher groove T1 can be crushed.
In the present embodiment, the pressure suppressor 47 is formed by bending a single band plate material in a curved shape at a midway portion in the longitudinal direction. The pressure suppressor 47 may be a plate-like body formed by combining a plurality of members by welding or the like. The pressure suppression tool 47 is disposed at the center in the width direction of the tillage device 4. Further, the pressure suppression tool 47 is disposed on the lower side of the transmission case 12. Moreover, the pressure suppression tool 47 is arrange | positioned so that a board width direction may correspond with the body width direction X1. As shown in FIGS. 4 and 5, the plate width of the pressure suppressor 47 is formed to be a little narrower than the groove width of the trencher groove T <b> 1.

  As shown in FIG. 3, the pressure suppression device 47 includes a pressure suppression portion 48 that is a portion that substantially suppresses the soil in the trencher groove T <b> 1 and an extension portion that extends in an inclined direction that moves upward from the pressure suppression portion 48 toward the front. 49. The pressure suppressing part 48 constitutes the rear part of the pressure suppressing tool 47 and is disposed below the transmission case 12. In other words, the pressure suppressing portion 48 is disposed below the first rotating shaft 15 and the second rotating shaft 16 in a side view.

Moreover, the pressure suppression part 48 is arrange | positioned between the front end G1 and the rear end G2 of the tilling part 9. FIG. That is, the pressure suppression tool 47 includes a pressure suppression portion 48 that suppresses the soil in the trencher groove T1 (excavation groove) and is disposed between the front and rear ends of the tillage portion 9.
The front end G1 of the tilling part 9 is the front end of the outer peripheral locus K1 of the tilling part 9 indicated by a two-dot chain line in FIGS. In other words, the front end G1 of the tilling portion 9 is, on the front side of the outer periphery locus K1, a horizontal line G3 orthogonal to the outer periphery locus K1 and the axes of the first rotating shaft 15 and the second rotating shaft 16 (see FIG. 3). Is where it intersects. Further, the rear end G2 of the tillage part 9 is the rear end of the outer peripheral locus K1. In other words, the rear end G2 of the tillage part 9 is where the outer peripheral locus K1 and the line G3 intersect on the rear side of the outer peripheral locus K1. From the above, it can be said that the pressure-reducing portion 48 is located in the range between the front end G1 and the rear end G2 of the outer peripheral locus K1 of the tilling portion 9.

In the present embodiment, the soil in the trencher groove T1 is squeezed almost simultaneously with the tilling.
Moreover, the pressure suppression part 48 is arrange | positioned below from the tilling part 9, and is located in the deep position below the groove | channel upper end of the trencher groove | channel T1 during an operation | work.
As shown in FIG. 3, the pressure suppression part 48 has the 1st pressure suppression site | part 48a and the 2nd pressure suppression site | part 48b. The 1st suppression part 48a comprises the rear part of the suppression part 48, and is formed in the flat form in which a plate | board surface faces up and down. The 2nd suppression part 48b comprises the front part of the suppression part 48, and is extended in the front diagonally upward from the 1st suppression part 48a. In addition, the second pressure suppressing portion 48b is formed in an arc shape (curved shape that protrudes downward) having an arc center above the front end portion of the first pressure suppressing portion 48a.

  As shown in FIG. 3, the extension portion 49 constitutes the front portion of the pressure suppressor 47 and is positioned obliquely downward in front of the lower portion of the transmission case 12. The extension portion 49 extends from the pressure suppressing portion 48 to a front position below the transmission case 12 (a height position of the first rotation shaft 15 and the second rotation shaft 16). The extension 49 has a first extension part 49a and a second extension part 49b. The 1st extension part 49a is extended in the inclination direction which shifts upward as it goes ahead from the upper end of the 2nd suppression part 48b. Moreover, the 1st extension site | part 49a is circular arc shape which has the same circular arc center as the 2nd suppression site | part 48b. The second extension portion 49b extends in an inclined direction that moves upward as it goes forward from the upper end of the first extension portion 49a. The second extension part 49b is formed in a flat plate shape and extends linearly from the first extension part 49a.

  As shown in FIG. 3, the second extension portion 49 b is located in the vicinity of the outer peripheral locus of the tilling portion 9 in a side view. As shown in FIG. 1, the 1st extension site | part 49a is immersed in the ground. The second extension part 49b protrudes upward from the field surface D1. In the pressure suppressor 47, when the work machine 2 moves forward, the upper soil in the trencher groove T1 is guided by the first extension portion 49a and enters the first pressure suppression portion 48a from the second pressure suppression portion 48b. . As a result, the density of the soil to be crushed by the crushed portion 48 can be increased, and the effect of crushed by the crushed portion 48 can be improved. Moreover, when the pressure suppression tool 47 moves forward by the 1st extension site | part 49a and the 2nd pressure suppression site | part 48b (curved part of the pressure suppression tool 47), it can prevent that the pressure suppression tool 47 is caught in soil.

The shape of the pressure suppressor 47 is not limited to that shown in the figure. Moreover, the pressure suppression tool 47 does not need to be formed with a board | plate material, and may be formed with the member of a roller shape or a wheel shape.
As shown in FIGS. 1 and 3, the pressure suppressor 47 is supported by a support device 51 provided in the tilling device 4. As shown in FIG. 3, the support device 51 includes a first position E1 (see a solid line in FIG. 3) where the pressure-reducing portion 48 represses the soil in the trencher groove T1 (excavation groove), and the pressure-reducing portion 48 is The pressure suppressor 47 is supported so that the position can be changed to a second position E2 (see a two-dot chain line in FIG. 3) located above the lower end G4.

The lower end G4 of the tillage part 9 is the lower end of the outer periphery locus K1. In other words, the lower end G4 of the tilling part 9 is where the outer peripheral locus K1 intersects with the vertical line perpendicular to the axis of the first rotating shaft 15 and the second rotating shaft 16 below the outer peripheral locus K1.
The support device 51 is pivotally attached to the rear portion of the pressure suppressor 47 and supported by the tillage device 4 so as to be movable up and down. The support device 51 pivotally supports the front portion of the pressure suppressor 47 and is attached to the tillage device 4. And a second support member 53.

First, the support device 51 and the pressure suppressor 47 will be schematically described.
As shown in FIG. 3, the lower end of the first support member 52 is pivotally attached to the rear portion of the pressure suppression device 47 via the first pin 54. The second support member 53 pivotally supports the front upper portion of the pressure suppression device 47 via the second pin 55 at the front lower portion. The pressure suppressor 47 swings up and down around the second pin 55 by moving the first support member 52 up and down (position adjustment up and down). When the pressure reducing tool 47 swings up and down, the position can be changed between the first position E1 and the second position E2. The first position E1 is a position when the work machine 2 is working, and the second position E2 is a position when the work machine 2 is not working, and the pressure suppression tool 47 is retracted upward from the first position E1. The retreat position.

Next, the support device 51 will be described in detail.
As shown in FIG. 3, the 1st support member 52 is formed with the strip | belt board material long up and down. The first support member 52 is disposed at the center of the tiller device 4 in the body width direction X1 and behind the transmission case 12. Further, the first support member 52 is disposed such that the plate surface faces the body width direction X1. In the first support member 52, a plurality of insertion holes 56a to 57d and 57 penetrating in the thickness direction (machine width direction X1) are formed at intervals in the longitudinal direction (vertical direction). In the present embodiment, the plurality of insertion holes 56 a to 56 d and 57 include four first insertion holes 56 a to 56 d and one second insertion hole 57. The first insertion holes 56 a to 56 d are provided in the upper part of the first support member 52. The first insertion holes 56 a to 56 d are holes used to adjust the vertical position of the first support member 52 with respect to the tilling device 4. By adjusting the upper and lower positions of the first support member 52, the height or posture of the pressure suppression unit 48 (pressure suppression tool 47) at the first position E1 is adjusted. The second insertion hole 57 is provided in the upper and lower middle part of the first support member 52. The second insertion hole 57 is a hole used to hold the pressure suppressor 47 at the second position E2.

  As shown in FIGS. 3 and 4, the lower end portion of the first support member 52 is pivotally attached to the first bracket 59 fixed to the rear portion of the pressure suppressor 47 via the first pin 54. The first bracket 59 is composed of two plate members arranged side by side in the body width direction X1 (the plate width direction of the pressure suppression device 47). The lower end portion of the first support member 52 is inserted between the plate members constituting the first bracket 59. The first pin 54 penetrates the first support member 52 and the first bracket 59 in the body width direction X1. The upper part of the first support member 52 is supported by a mounting bracket 60 provided on the machine casing 8. Therefore, when adjusting the angle of the tilling cover 10, the support frame 25, the cocoon forming device 5, and the seeding device 6 with respect to the machine frame 8, the first support member 52 also moves in conjunction with the support frame 25 and the like. Thereby, the posture of the pressure suppressor 47 is also adjusted.

  As shown in FIGS. 2 and 3, the mounting bracket 60 is disposed between the movable bracket 22 and behind the transmission case 12. The mounting bracket 60 has two plate members 60a and 60b arranged side by side in the body width direction X1. As shown in FIG. 4, support holes 61 are formed concentrically in the body width direction X <b> 1 in each of the plate members 60 a and 60 b. The rear portion of the mounting bracket 60 is fixed to the tool bar 27 and protrudes forward from the tool bar 27. As shown in FIG. 3, the mounting bracket 60 has a first reinforcing member 60c located at the front end between the plate members 60a and 60b. Further, the mounting bracket 60 has a second reinforcing member 60d located between the plate members 60a and 60b and behind the first reinforcing member 60c. The upper part of the first support member 52 is inserted between the plate members of the mounting bracket 60 and between the first reinforcing member 60c and the second reinforcing member 60d.

  As shown in FIG. 4, the support pin 62 is inserted through the first insertion hole 56 a and the support hole 61. The first support member 52 is supported by the mounting bracket 60 by the support pins 62. By removing the support pin 62, the first support member 52 can be moved up and down. The first support member 52 is vertically adjusted by inserting the support pin 62 into the first insertion holes 56a to 56d at the position where the first support member 52 is moved and moved. By adjusting the position of the first support member 52, the height (vertical position) or posture of the pressure suppressing portion 48 can be adjusted. As shown by a two-dot chain line in FIG. 3, the first support member 52 is held at the second position E2 by pulling up the first support member 52 and inserting the support pin 62 into the second insertion hole 57.

  As shown in FIGS. 3 and 4, the second support member 53 includes a first member 63, a second member 64, a third member 65, and a fourth member 66. The first member 63 is constituted by two plate members arranged on the left and right of the upper and lower middle part of the transmission case 12. The first member 63 has a rear part 63 a fixed to the transmission case 12 and a front part 63 b protruding from the transmission case 12. The front portion 63b of the first member 63 extends in an oblique direction that moves downward as it goes forward. The second member 64 is formed in a vertically long shape, and the upper part is fixed to the front part 63 b of the first member 63. The second member 64 is arranged in an oblique direction that moves downward as it goes forward. The lower part of the second member 64 is pivotally attached to the second bracket 67 fixed to the front upper part of the pressure suppressor 47 via the second pin 55. Therefore, the second support member 53 pivotally supports the pressure suppression tool 47 on the front side of the transmission case 12.

As shown in FIG. 4, the 2nd bracket 67 is comprised by the two board | plate materials arrange | positioned along with the body width direction X1 (plate width direction of the pressure suppression tool 47). The lower part of the second member 64 is inserted between the plate members constituting the second bracket 67. The second pin 55 passes through the second member 64 and the second bracket 67 in the body width direction X1.
As shown in FIGS. 3 and 4, the third member 65 is formed of a plate material and is fixed to the rear end of the first member 63. The fourth member 66 is fixed to the third member 65 and protrudes rearward from the third member 65. The fourth member 66 is composed of two plate members positioned on the left and right side surfaces of the first support member 52. The fourth member 66 sandwiches the first support member 52 and restricts (rattles) the position of the first support member 52 in the body width direction X1.

  In the operation of standing and sowing the ridge R1 on the trencher groove T1 by the work machine 2, when the tractor 1 travels with the central portion of the tiller device 4 in the machine width direction X1 aligned with the trencher groove T1, the pressure suppressor 47 (pressure suppression) 48) is located above the trencher groove T1 and moves along the trencher groove T1. At that time, the load of the tillage device 4 or the like acts on the pressure reducing unit 48. As a result, the soil in the trencher groove T1 is crushed and the cavity formed in the soil in the trencher groove T1 is crushed.

  Moreover, before working with the work machine 2, the fertilizer S1 may be spread on the surface of the soil in the trencher groove T1. In the conventional working machine 2, the fertilizer S1 is pushed downward from the upper end of the trencher groove T1 by the pressure reducing tool 47. If the fertilizer S1 is pushed downward from the upper end of the trencher groove T1, the fertilizer S1 will not be mixed with the formed rod R1. For this reason, it is considered that the initial growth of the seeds embedded in the ridge R1 is slow. Therefore, the working machine 2 according to the present embodiment is disposed in front of the pressure reducing portion 48 and removes the soil on the surface side of the soil in the trencher groove T1 (excavation groove) to the side of the trencher groove T1 (excavation groove). Equipped with a repellent member (culture plate).

As shown in FIGS. 1 and 3 to 6, the earth removing member 69 is fixed to a mounting plate 70 provided at the front portion of the pressure suppressor 47. The mounting plate 70 is superimposed on the front surface of the second extension portion 49b of the pressure suppressor 47 and is fixed to the second extension portion 49b with a bolt or the like.
As shown in FIG. 3, the earth removing member 69 is provided at the lower part of the front surface of the mounting plate 70. In the side view, the earth retaining member 69 is located on the lower side of the front portion of the tillage portion 9. In other words, the earth removing member 69 is located below the front end G1 of the outer periphery locus K1 and outside the outer periphery locus K1. Further, the front end side of the earth removing member 69 protrudes forward from the front end of the outer peripheral locus K1. In other words, most of the earth removing member 69 is located behind the front end of the outer peripheral locus K1.

As shown in FIGS. 3 to 5, the earth removing member 69 has a left first plate portion 71 and a right second plate portion 72. The 1st board part 71 and the 2nd board part 72 are joined in the center of the body width direction X1 of the pressure suppression tool 47. FIG. The joint portion 69a between the first plate portion 71 and the second plate portion 72 is formed in a curved shape that is inclined so as to move downward as it goes forward and recessed toward the rear in the side view shown in FIG. Yes.

  The front surface of the first plate portion 71 is an inclined surface that moves outward from the aircraft as it goes rearward. The front surface of the second plate portion 72 is also an inclined surface that moves outward as the vehicle goes rearward. The rear end of the first plate portion 71 is in contact with the front surface of the mounting plate 70 and joined by welding or the like. The rear end of the first plate portion 71 is inclined so as to shift downward as it goes outward from the body in a front view. The rear end of the second plate portion 72 is also in contact with the front surface of the mounting plate 70 and joined by welding or the like. The rear end of the second plate portion 72 is also inclined so as to move downward as it goes outward from the body in a front view.

  As shown in FIG. 1 and FIG. 6, during the work by the work machine 2, the soil removal member 69 is substantially immersed in the soil of the trencher groove T <b> 1 leaving a part of the upper part. When the work implement 2 moves forward, the soil removal member 69 advances the soil on the surface side of the soil in the trencher groove T1 by dividing it left and right. That is, the soil on the surface side of the soil in the trencher groove T1 is guided by the front surface of the earth removing member 69 (the first plate portion 71 and the second plate portion 72), and on the left side and the right side of the trencher groove T1 (trencher groove). Beside T1) At that time, the fertilizer S1 sown on the surface of the soil in the trencher groove T1 is also moved by the trencher groove T1 along with the soil. Accordingly, it is possible to prevent the fertilizer S1 from being pushed downward from the upper end of the trencher groove T1 by the pressure suppressor 47.

  Moreover, before the tilling claw 17 is driven into the surface D1 of the field F1, the soil removal member 69 places the soil on the surface side of the soil in the trencher groove T1 on the left side and the right side of the trencher groove T1. By the earth removing member 69, the fertilizer S1 obtained by the side of the trencher groove T1 is mixed with the cultivated soil cultivated by the cultivating section 9 and released to the rear. The fertilizer S1 released to the rear together with the cultivated soil is collected in the center of the machine body width direction X1 by the guide plate 33, and is mixed in the soil in the ridge R1 formed by the culvert former 34 and above the pressure-reducing portion 48. (See FIG. 7).

As shown in FIG. 3, the earth retaining member 69 is located above the lower end of the tillage part 9 when the pressure reducing part 48 (pressure reducing tool 47) is set to the second position E2.
Note that the earth removing member 69 may be directly fixed to the pressure suppressor 47 by welding or the like. The earth removing member 69 may not be provided in the pressure suppressor 47, and a support structure that supports the earth removing member 69 may be provided separately. By providing the earth removing member 69 in the pressure suppressor 47, the support structure of the earth removing member 69 can be simplified.

The work machine 2 of the present embodiment includes a search guide 73 that is inserted into the trencher groove T1 and aligns the center of the work machine 2 in the machine body width direction X1 with the trencher groove T1. In other words, the search guide 73 is provided which is inserted into the trencher groove T1 (excavation groove) and matches the center portions in the width direction of the trencher groove T1 (excavation groove) and the rod R1.
As shown in FIGS. 1 and 3 to 5, the search guide 73 is provided in the pressure suppressor 47. Specifically, the search guide 73 is provided in the first suppression site 48 a of the suppression unit 48. The search guide 73 includes a first guide plate 73L and a second guide plate 73R. The first guide plate 73L and the second guide plate 73R are configured by a single plate member (including a plate member obtained by joining a plurality of members by welding). The first guide plate 73L is disposed on the left side of the first pressure suppressing portion 48a, and the upper end portion is fixed to the left side end of the first guide plate 73L by welding or the like. Therefore, the first guide plate 73L protrudes downward from the first pressure suppressing portion 48a.

The second guide plate 73R is disposed on the right side of the first pressure-reducing portion 48a, and the upper end is fixed to the right side end of the first guide plate 73L by welding or the like. Therefore, the second guide plate 73R also protrudes downward from the first pressure suppressing portion 48a.
The first guide plate 73L and the second guide plate 73R are displaced forward and backward. Specifically, the second guide plate 73R is displaced forward with respect to the first guide plate 73L.

Since the first guide plate 73L and the second guide plate 73R are displaced in the front-rear direction, the resistance from the soil received when the search guide 73 is immersed in the soil of the trencher groove T1 can be reduced.
A blade portion 73a is formed at the front ends of the first guide plate 73L and the second guide plate 73R. As shown in FIG. 5, the blade portions 73a of the first guide plate 73L and the second guide plate 73R are formed as single blades that move in the direction toward the first pressure-reducing portion 48a as they go forward.

  The first guide plate 73L and the second guide plate 73R are members independent of each other. That is, the first guide plate 73L and the second guide plate 73R are not connected to each other. In other words, the search guide 73 is not provided with a member that connects the first guide plate 73L and the second guide plate 73R. Therefore, a space is provided between the first guide plate 73L and the second guide plate 73R. That is, the work machine 2 includes a search guide 73 in which a space is formed between the first guide plate 73L plate and the second guide plate 73R plate.

  When the work machine 2 performs work, the search guide 73 (first guide plate 73L and second guide plate 73R) is inserted into the trencher groove T1. The first guide plate 73L comes into contact with one groove wall T2 in the groove width direction of the trencher groove T1 and is guided by the groove wall T2. The second guide plate 73R contacts the other groove wall T3 in the groove width direction of the trencher groove T1 and is guided by the groove wall T3. Thereby, the center of the work machine 2 in the width direction can be erected and seeded without being shifted from the trencher groove T1 in the machine body width direction X1. Further, since the space between the first guide plate 73L and the second guide plate 73R is a space, a cavity is formed on the center side in the groove width direction in the trencher groove T1 after the search guide 73 has passed. There is nothing. That is, if there is a connecting member that connects the first guide plate 73L and the second guide plate 73R, the trace that the search guide 73 has passed by the connecting member tends to remain as a cavity, and the center in the groove width direction in the trencher groove T1. A cavity may be formed on the part side. This is not the case with the search guide 73 of this embodiment.

In the present embodiment, the search guide 73 is constituted by a first guide plate 73L and a second guide plate 73R, and the first guide plate 73L and the second guide plate 73R are ends of the trencher groove T1 in the groove width direction. Since it passes through the section, the trace that the search guide 73 has passed does not become a problem.
Further, the search guide 73 is arranged below the transmission case 12, in other words, below the rotation center C1 in a state where the pressure suppressing portion 48 is located at the first position E1. That is, the search guide 73 is disposed below the cultivator 4 that is a heavy object. Thereby, it is possible to appropriately restrict the tilling device 4 from shifting from the trencher groove T1 in the machine body width direction X1 by the search guide 73. Moreover, the shift | offset | difference of the machine body width direction X1 of the hull molding machine 34 located in the back of the tillage apparatus 4 can be prevented by regulating the shift | offset | difference of the machine width direction X1 of the tilling apparatus 4. FIG. In other words, the search guide 73 prevents the work implement 1 from shifting from the trencher groove T1 in the machine body width direction X1 at the front portion of the work implement 1. Thereby, it is possible to satisfactorily prevent the saddle former 34 at the rear portion of the work machine 1 from being shifted from the trencher groove T1 in the machine body width direction X1.

  As shown in FIG. 3, the search guide 73 is located above the lower end of the tillage unit 9 when the pressure suppressor 47 is set to the second position E2. Since the pressure suppression device 47 is curved in the middle in the longitudinal direction, when the pressure suppression device 47 is lifted, the rear portion (pressure suppression portion 48) of the pressure suppression device 47 is greatly lifted. As a result, the search guide 73 can be lifted greatly, and the search guide 73 can be positioned above the lower end of the tillage unit 9.

  Note that the search guide 73 may not be provided in the pressure suppression tool 47, and may be supported by a support tool formed by a separate member different from the pressure suppression tool 47. By providing the search guide 73 in the pressure suppressor 47, the support tool can be omitted, and the structure can be simplified. In addition, after the search guide 73 has passed, the search guide 73 can be provided in the pressure reducing portion 48 because no cavity is formed on the center side in the groove width direction of the trencher groove T1.

According to the working machine 1 of this embodiment mentioned above, there exist the following effects.
The work machine 1 includes a cultivating device 4 having a cultivating unit 9 for cultivating a field F1, and a cocoon forming method in which a ridge R1 is placed on a digging groove with soil that is disposed behind the cultivating unit 9 and cultivated by the cultivating unit 9. And a pressure-reducing tool 47 that has a pressure-reducing portion 48 that is disposed between the front and rear ends of the tillage portion 9. In other words, the pressure suppression part 48 is located in the range between the front end G1 and the rear end G2 of the outer periphery locus K1 of the tilling part 9. According to this, since the pressure suppression part 48 is located between the front end G1 and the rear end G2 of the tilling part 9 (peripheral locus K1), the pressure reducing tool 47 inhibits the flow of the soil plowed by the tilling part 9. In addition, the ridge R1 can be molded well.

  Conventionally, there is a work machine 2 in which a pressure suppression tool 47 is provided in front of the tillage unit 9. If the pressure suppression tool 47 is provided in front of the tillage unit 9, the front and rear length of the work implement 2 may be increased. On the other hand, in this embodiment, the work implement 2 can be compactly formed in the front-rear direction by arranging the pressure-reducing part 48 between the front and rear ends of the tilling part 9. Moreover, in this embodiment, since the pressure suppression part 48 is arrange | positioned between the front-and-back ends of the cultivation part 9, the load of the cultivation apparatus 4 is applied rather than the working machine 2 which provided the pressure suppression tool 47 ahead of the cultivation part 9. It can fully be applied to the suppression part 48. Thereby, the suppression effect by the suppression tool 47 is securable. In addition, the pressure suppressor 47 (the pressure suppression unit 48) can suppress blurring of the work machine 2 in the body width direction X1.

Moreover, since the suppression part 48 is arrange | positioned below the tillage part 9, it can fully suppress the soil in trencher groove | channel T1 (excavation groove).
The cultivator 4 is a center drive type rotary cultivator having a transmission case 12 at the center in the machine body width direction X <b> 1, and the pressure reducing portion 48 is disposed below the transmission case 12. Thereby, the suppression part 48 can be easily arrange | positioned between the front-and-back ends of the tilling part 9. FIG.

In addition, when the pressure suppressor 47 is arranged behind the tillage unit 9 and in front of the rod forming device 34 as in the prior art, when the pressure suppressing device 47 is lifted high upward, the rod forming device 34 becomes an obstacle. There is a case. On the other hand, in this embodiment, the pressure suppression tool 47 can be lifted high by arrange | positioning the pressure suppression part 48 below the transmission case 12. FIG.
Moreover, the pressure suppression tool 47 has the extension part 49 extended in the inclination direction which shifts upward as it goes ahead from the pressure suppression part 48. As shown in FIG. Thereby, the soil ahead of the pressure suppression part 48 can be made to enter under the pressure suppression part 48, and the density of the soil suppressed by the pressure suppression part 48 can be made high.

  The work implement 2 is a search guide 73 that is inserted into the trencher groove T1 (excavation groove) and matches the central portions in the width direction of the excavation groove and the rod R1, and includes one of the trencher grooves T1 (excavation groove). The first guide plate 73L and the second guide have a first guide plate 73L guided by the groove wall T2 and a second guide plate 73R guided by the other groove wall T3 of the trencher groove T1 (excavation groove). A search guide 73 having a space between the plate 73R is provided. Accordingly, it is possible to prevent the search guide 73 from forming a cavity on the center side in the groove width direction of the trencher groove T1 (excavation groove) after the search guide 73 has passed.

  In addition, the working machine 2 can be repositioned so that the crushing portion 48 can change the position to a first position E1 where the soil in the excavation groove is capped, and a second position E2 where the crushing portion 48 is located above the lower end of the tilling portion 9. A support device 51 for supporting the tool 47 is provided. By positioning the pressure suppressor 47 at the second position E2, the lower end side of the tillage part 9 can be grounded over the body width direction X1. Thereby, when work is not performed, the work machine 2 can be stably placed on a placement surface such as the ground surface of the storage place.

  The work implement 2 is a search guide 73 that is inserted into the trencher groove T1 (excavation groove) and aligns the center portions in the width direction of the trencher groove T1 (excavation groove) and the rod R1, and is fixed to the pressure suppressor 47. In addition, a search guide 73 is provided that is located above the lower end of the tillage unit 9 when the pressure reducing tool 47 is changed to the second position E2. By positioning the pressure suppressor 47 at the second position E2, the lower end side of the tillage part 9 can be grounded over the body width direction X1. Thereby, when work is not performed, the work machine 2 can be stably placed on a mounting surface such as the ground.

The support device 51 is pivotally attached to the rear portion of the pressure suppressor 47 and supported by the tillage device 4 so as to be vertically movable. The support device 51 pivotally supports the front portion of the pressure suppressor 47 and is attached to the tillage device 4. And a second support member 53 attached thereto. Thereby, the position of the pressure suppression tool 47 can be easily changed to the 1st position E1 and the 2nd position E2.
Further, the tilling device 4 is a center drive type rotary tilling device having a transmission case 12 for transmitting power to the tilling portion 9 in the center portion in the machine body width direction X1, and the pressure reducing portion 48 is disposed below the transmission case 12. The first support member 52 is disposed behind the transmission case 12, and the second support member 53 pivotally supports the pressure suppressor 47 on the front side of the transmission case 12. Thereby, the space which changes the position of the pressure suppression tool 47 to the 1st position E1 and the 2nd position E2 is securable.

In addition, the work machine 2 includes a soil removal member 69 that is disposed in front of the pressure reducing portion 48 and removes the soil on the surface side of the soil in the trencher groove T1 (excavation groove) to the side of the trencher groove T1 (excavation groove). I have. Thereby, it is possible to prevent the fertilizer S1 sown on the surface of the soil in the trencher groove T1 (excavation groove) from being pushed into the lower side of the pressure reducing portion 48.
In addition, the earth retaining member 69 is located on the lower side of the front portion of the tillage portion 9. In other words, the earth removing member 69 is located below the front end G1 of the outer periphery locus K1 and outside the outer periphery locus K1. Further, the front end side of the earth removing member 69 protrudes forward from the front end of the outer peripheral locus K1. In other words, most of the earth removing member 69 is located behind the front end of the outer peripheral locus K1. Thereby, the earthproof member 69 can be arrange | positioned compactly. As mentioned above, although this invention was demonstrated, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 working machine 4 tillage device (rotary tillage device)
DESCRIPTION OF SYMBOLS 9 Tilling part 12 Power transmission case 34 Shark shaper 47 Pressure suppressor 48 Pressure suppression part 49 Extension part 51 Support apparatus 52 1st support member 53 2nd support member 69 Earthbreak member 73 Search guide 73L 1st guide plate 73R 2nd guide plate E1 1st position E2 2nd position F1 Field R1 畝 T1 Excavation groove (trencher groove)
X1 Aircraft width direction

Claims (10)

A working machine that performs work while moving along excavation grooves that are formed in a field and filled with soil,
A tilling device having a tilling section for tilling the field;
A ridge forming device for setting a ridge on the excavation groove with the soil disposed behind the cultivating section and cultivated by the cultivating section;
A pressure-reducing tool that represses the soil in the excavation groove and has a pressure-reducing part disposed between front and rear ends of the tillage part;
Working machine equipped with.   The work implement according to claim 1, wherein the pressure suppressing unit is disposed below the tillage unit. The tilling device is a center drive type rotary tilling device having a transmission case at the center in the body width direction,
The work machine according to claim 1, wherein the pressure suppressing unit is disposed below the transmission case.   The work implement according to any one of claims 1 to 3, wherein the pressure suppressor includes an extension portion extending in an inclination direction that moves upward as it goes forward from the pressure suppression portion.   A search guide that is inserted into the excavation groove to make the central portions in the width direction of the excavation groove and the rod coincide with each other, the first guide plate guided to one groove wall of the excavation groove, and the excavation groove 5. A search guide having a second guide plate guided by the other groove wall and having a space between the first guide plate and the second guide plate. The working machine according to claim 1.   A supporting device for supporting the pressure reducing tool so that the position of the pressure reducing portion can be changed to a first position where the soil in the excavation groove is pressed and a second position where the pressure reducing portion is located above a lower end of the tillage portion; The work machine of any one of Claims 2-5 provided.   A search guide that is inserted into the excavation groove to match the central portions in the width direction of the excavation groove and the rod, and is fixed to the pressure suppressor and when the position of the pressure suppressor is changed to the second position, The working machine according to claim 6, further comprising a search guide positioned above the lower end of the tillage unit.   The support device is pivotally attached to the rear portion of the pressure suppressor and supported by the tillage device so as to be vertically movable, and pivotally supports the front portion of the pressure suppressor and is attached to the tillage device. The work machine according to claim 6 or 7, comprising a second support member. The tilling device is a center drive type rotary tilling device having a transmission case for transmitting power to the tilling portion at the center in the body width direction,
The pressure suppressing portion is disposed below the transmission case,
The first support member is disposed behind the transmission case,
The work machine according to claim 8, wherein the second support member pivotally supports the pressure suppression tool on a front side of the transmission case.   The work according to any one of claims 1 to 9, further comprising a soil-removing member that is disposed in front of the pressure-reducing portion and removes the soil on the surface side of the soil in the excavation groove to the side of the excavation groove. Machine.

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