JP2015192676A - Agricultural work machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an agricultural work machine capable of performing proper tilling and ground-leveling operation.SOLUTION: An agricultural work machine 1 comprises: a central operation part 11 that performs tilling and ground-leveling operation; and an extension operation part 12 that is capable of selectively switching between a folding non-working state and an extension working state, and performs tilling and ground-leveling operation in the extension working state. An extension side earth scrapper body 61 is provided at an end at the side of the central operation part 11 of the extension operation part 12, only the extension side earth scrapper body 61 performs earth scrapper operation in which the earth of an earth rising portion 6 is brought to the side of a recess 5 of a running trace.

Description

  The present invention relates to an agricultural machine that can perform appropriate tillage work.

  Conventionally, for example, a folding agricultural machine described in Patent Document 1 is known.

  This conventional foldable farm work machine is connected to the rear part of a tractor, which is a traveling vehicle, and has a central working part for plowing and leveling work, and is provided rotatably at both left and right ends of the central working part. It is possible to selectively switch between the folding non-working state and the unfolding working state, and it includes left and right extension working parts that perform tilling work on the side of the central working part in the unfolding working state.

Japanese Patent Laid-Open No. 10-304703 (FIG. 1)

  However, in the conventional agricultural machine, for example, depending on the soil quality of the field, the soil will be affected by the soil climbing part and the traveling trace recess (for example, the tire trace recess) formed on the surface of the field by the traveling of the tractor. There is a risk that no correct tillage work will be performed.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can perform suitable tillage work.

  The agricultural machine according to claim 1 is connected to the traveling vehicle and is provided in the central working unit that performs the tilling work, and can be selectively switched between the folding non-working state and the unfolding working state. An extension working part that performs tillage leveling work in the unfolding operation state, and an uplift that is provided on the end of the extension working part on the side of the central working part and formed on the surface of the field by the traveling of the traveling vehicle. An extension side mulcher that moves the soil of the part toward the travel trace recess side, and the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle alone is the travel trace recess side It is a farm work machine which performs the earth gathering work approached to, Comprising: The said extension side earth gathering body is attached to the inner end part front surface of the tilling cover part of the said extension operation part.

  The agricultural machine according to claim 2 is connected to the traveling vehicle, and is provided in the central working unit for plowing and leveling work, and can be selectively switched between the folding non-working state and the unfolding working state. An extension working part that performs tillage leveling work in the unfolding operation state, and an uplift that is provided on the end of the extension working part on the side of the central working part and formed on the surface of the field by the traveling of the traveling vehicle. An extension side mulcher that moves the soil of the part toward the travel trace recess side, and the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle alone is the travel trace recess side It is a farm work machine which performs the earth gathering work approached to, Comprising: The said extension side earth gathering body is attached to the inner bracket part of the said extension operation part.

  The agricultural machine according to claim 3 is connected to the traveling vehicle, and is provided in the central working unit for plowing and leveling work, and can be selectively switched between the folding non-working state and the unfolding working state. An extension working part that performs tillage leveling work in the unfolding operation state, and an uplift that is provided on the end of the extension working part on the side of the central working part and formed on the surface of the field by the traveling of the traveling vehicle. An extension side mulcher that moves the soil of the part toward the travel trace recess side, and the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle alone is the travel trace recess side A farm working machine that performs a mulching work that approaches the first working part, wherein the extended side mulching body includes a first mulching board part positioned in front of the extending work part, and a second digging board part located in front of the central working part; It is what has.

  According to the present invention, it is possible to bring the soil of the soil rising portion formed on the field surface portion by traveling of the traveling vehicle toward the traveling trace concave portion side, so that appropriate tillage work can be performed.

It is a front view of the agricultural working machine which concerns on the 1st Embodiment of this invention. It is a combination of the bottom view of the agricultural machine and the front sectional view of the surface portion of the field. It is a front view of the state which folded the extension work part of the left side of an agricultural working machine same as the above. (A) is a front view of a center side earth gathering body, (b) is a front view of an extension side earth gathering body. (A) is a bottom view of the center side mulcher, and (b) is a bottom view of the extension side mulcher. It is a principal part bottom view of the state which the clutch of the agricultural working machine same as the above engaged. It is a figure which shows the agricultural working machine which concerns on the 2nd Embodiment of this invention, (a) is a bottom view of the center side mulcher, (b) is a bottom view of the extension side mulcher. It is a principal part bottom view of the state which the clutch of the agricultural working machine same as the above engaged. It is a principal part bottom view of the state which the clutches of the agricultural machine concerning the 3rd Embodiment of this invention meshed. It combines the bottom view of the agricultural working machine which concerns on the 4th Embodiment of this invention, and front view sectional drawing of an agricultural field surface part. It is a front view of the state which folded the extension work part of the left side of an agricultural working machine same as the above.

  A first embodiment of the present invention will be described with reference to FIGS.

  1 to 3, reference numeral 1 denotes an agricultural working machine. The agricultural working machine 1 is, for example, a towing-type tillage leveling device (plowing machine) used by being connected to a rear portion of a tractor that is a traveling vehicle (not shown).

  That is, this agricultural work machine 1 is a foldable working machine that performs the tilling work while moving on the field toward the front, which is the traveling direction, by traveling of the tractor while being connected to the rear part of the tractor.

  The tractor includes a tractor body, which is a vehicle body, and a pair of left and right front wheels 2 are provided at the front of the tractor body, and a pair of left and right rear wheels having a width dimension larger than that of the front wheel 2 at the rear of the tractor body. A wheel (tire) 3 is provided. Then, when the front wheel 2 and the rear wheel 3 rotate based on the engine output of the tractor body and the tractor travels on the field, two parallel concave grooves are formed on the surface of the field by the passage of the rear wheel 3. Travel trace recesses (tire trace recesses) 5 are formed, and earth rising parts 6 are formed in a convex shape on both sides of each travel trace recess 5 (see FIG. 2).

  As shown in FIGS. 1 to 3, the farm work machine 1 is connected to a three-point link (work machine lifting support device) at the rear part of the tractor and performs a tilling work by power from the tractor in the left-right longitudinal center work. Part 11 is provided.

  Further, the agricultural machine 1 is provided at both ends in the left and right direction of the central working unit 11 so as to be pivotable in the vertical direction around a pivot center axis (rotation center axis) 10 that is a pivot point. A pair of left and right folds (left and right) folding work that can be selectively switched between the tatami mat non-working state and the unfolding work state, and in the unfolding work state, performs the tilling work with the power from the central working unit 11 The extension working part 12 which is a part is provided. Further, the agricultural working machine 1 includes an electric hydraulic cylinder 13 that is a driving unit that rotates the extended working unit 12 with respect to the central working unit 11.

  Both extension working parts 12 have a symmetrical configuration and rotate with respect to the central working part 11 in accordance with the expansion and contraction of the corresponding electrohydraulic cylinder 13. Each extension working section 12 is connected to the central working section 11 on the outer side of the central working section 11 by a predetermined angle in one direction (deployment direction) around the rotation central axis 10, for example, approximately 180 degrees. When the unfolding work state is located side by side, it is locked by a locking means (not shown) when this unfolding work state is reached. In addition, each extension working unit 12 is a folding non-working position located above the central working unit 11 by a predetermined angle in the other direction (folding direction) around the rotation center axis 10 (for example, approximately 180 degrees). When this state is reached, and this folding non-working state is reached, it is locked by locking means (not shown). It should be noted that the rotation angle of each extension working unit 12 is other than 180 degrees, and may be 150 degrees or 90 degrees, for example.

  The central working unit 11 is a left-right longitudinal machine body 16 connected to a three-point link at the rear of the tractor, and a tiller that is rotatably provided on the machine body 16 and rotates in a predetermined direction by power from the tractor. A body 17 and a leveling body 18 that is provided at the rear end of the body 16 so as to be pivotable in the vertical direction and performs leveling work behind the tillage body 17.

  The airframe 16 has a cylindrical frame portion 19 that is elongated in the left-right direction, and a gear box portion 20 is provided at the center in the longitudinal direction of the frame portion 19, and the input shaft 21 faces forward from the gear box portion 20. Protruding. The input shaft 21 is connected to a PTO shaft (not shown) of the tractor via a transmission means (not shown) constituted by a universal joint and a transmission shaft.

  An upper portion of a transmission case portion (one side shaft support portion) 23 such as a box-shaped chain case is attached to one longitudinal end portion (for example, the left end portion) of the frame portion 19, and the other longitudinal end portion (for example, the right end portion) of the frame portion 19 is attached. The upper part of the plate-like bracket part (the other side shaft support part) 24 is attached to the part). A bottomed cylindrical case reinforcing portion 22 that covers the front and rear surfaces, the left and right side surfaces, and the lower surface of the lower portion of the transmission case portion 23 is fitted to the lower portion of the transmission case portion 23.

  The airframe 16 has a tillage cover portion (center cover) 25 that is a substantially arc-shaped cover means that covers the upper portion of the tillage body 17, and the rear end of the tillage cover portion 25 has a front end of the leveling body 18. The part is rotatably attached.

  The cultivating body 17 has a rotation shaft 26 that is a horizontal cultivating shaft that is horizontally supported rotatably by the lower portion of the transmission case portion 23 and the lower portion of the bracket portion 24. The rotating shaft 26 is connected to the input shaft 21 and rotates by receiving power from transmission means (not shown) housed in the frame portion 19 and the transmission case portion 23.

  One end portion of the rotating shaft 26 in the axial direction is rotatably supported at the lower portion of the transmission case portion 23, and a portion of the one end portion in the axial direction of the rotating shaft 26 that protrudes outward from the outer surface of the case reinforcing portion 22 A center side clutch 27 is fixed to the front side. Similarly, the other axial end portion of the rotating shaft 26 is rotatably supported at the lower portion of the bracket portion 24, and the other axial end portion of the rotating shaft 26 faces outward from the outer surface of the bracket portion 24. A central clutch 27 is fixed to the protruding portion. Each of the left and right center side clutches 27 is formed with a plurality of engaging projections 27a arranged in the circumferential direction.

  In addition, a plurality of tilling claws (not shown) are attached to the rotating shaft 26 to perform tilling work while rotating integrally with the rotating shaft 26. The plurality of tilling claws are substantially square-shaped when viewed from the front, and are arranged at equal intervals from one end side to the other end side of the rotating shaft 26 in the axial direction.

  The leveling body 18 is a first leveling plate (a first leveling board having a left-right longitudinal shape) attached to a rear end portion of the tillage cover portion 25 of the body 16 so as to be pivotable in the vertical direction about a horizontal axis. Central flat plate) 31 is provided. A second leveling plate (central rake) 32, which is a second leveling body that is long in the left-right direction, is attached to the rear end portion of the first leveling plate 31 so as to be pivotable in the vertical direction about the horizontal axis. Yes.

  The extension work unit 12 is a folding machine body 36, which is a folding machine body that is attached to both ends in the left and right direction of the frame part 19 of the machine body 16 of the central work unit 11 so as to be pivotable in the vertical direction about the pivot center axis 10. An extension tiller 37 that is a folding tiller that is provided on the extension body 36 so as to be rotatable and rotates in a predetermined direction by power from the tiller 17 of the central working unit 11, and a rear end of the extension body 36 Folding leveling that is provided in the upper part so that it can be pivoted in the vertical direction and is connected to the leveling body 18 of the central work unit 11 when the extension work unit 12 is in the unfolding operation state, and performs leveling work behind the extended tillage body 37 And an extended leveling body 38 which is a body. A gas spring 39 for assisting lifting is installed between the extension body 36 and the body 16.

  The extension body 36 has a plate-like inner bracket part (one side support part) 41 and a plate-like outer bracket part (the other side support part) 42 which are opposed to each other at both ends in the left-right direction. Between the upper part and the upper part of the outer bracket part 42, a tilling cover part (side cover) 43, which is a substantially arc-shaped cover means for covering the upper part of the extended tillage body 37, is constructed. A front end portion of the extended leveling body 38 is rotatably attached to the rear end portion of the tillage cover portion 43.

  The extended tillage body 37 has a rotation shaft 46 that is a horizontal tillage shaft that is horizontally supported rotatably by the lower portion of the inner bracket portion 41 and the lower portion of the outer bracket portion 42.

  One end portion (inner end portion) of the rotating shaft 46 in the axial direction is rotatably supported by the inner bracket portion 41 which is a side bracket, and the central work of the inner bracket portion 41 of the one axial end portion of the rotating shaft 46 is performed. An extension side clutch 47 that engages with the central side clutch 27 of the central working part 11 and transmits power when the extension working part 12 is deployed is fixed to a portion that protrudes inward from the surface on the part 11 side. Yes. The extension-side clutch 47 is formed with a plurality of engagement recesses 47a that are detachably engaged with the engagement protrusions 27a of the center-side clutch 27. That is, the engagement convex portion 27a of the center side clutch 27 and the engagement concave portion 47a of the extension side clutch 47 are engaged with each other, so that power is transmitted from the tillage body 17 of the center working portion 11 to the extension tillage portion 37 of the extension working portion 12. The cultivated body 17 and the extended cultivated body 37 rotate together. Note that the other axial end portion (outer end portion) of the rotating shaft 46 is rotatably supported by the lower portion of the outer bracket portion 42.

  In addition, a plurality of tilling claws (not shown) are attached to the rotating shaft 46 to perform the tilling work while rotating integrally with the rotating shaft 46 when the extension working unit 12 is in the unfolding operation state. The plurality of tilling claws are substantially square-shaped when viewed from the front, and are arranged at equal intervals from one end side to the other end side in the axial direction of the rotation shaft.

  The extension leveling body 38 is a first extension leveling body having a longitudinal direction that is attached to the rear end portion of the tillage cover portion 43 of the extension machine 36 so as to be pivotable in the vertical direction about a horizontal axis. It has 1 extended leveling plate (side flat plate) 51. At the rear end of the first extension leveling plate 51, a second extension leveling plate (side rake) 52, which is a second extension leveling body that is elongated in the left-right direction, can be pivoted vertically about a horizontal axis in the horizontal direction. Is attached. An extension rake 53, which is an additional extension leveling body, is rotatably attached to the outer end portion of the second extension leveling plate 52. The extension body 36 is provided with extension rake driving means 54 for rotating the extension rake 53 with respect to the second extension leveling plate 52.

  Further, as shown in FIGS. 4 to 6 and the like, the agricultural working machine 1 is fixedly attached to an inner end portion which is an end portion of the extension working portion 12 on the central working portion 11 side, for example, the inner bracket portion 41. The traveling trace recess 5 is located adjacent to the soil uphill portion 6 of the soil uphill portion 6 out of the pair of soil uphill portions 6 formed on the surface of the field by the traveling of the tractor. An extension side earthing body 61 that moves toward the side (that is, the central working unit 11 side) is provided.

  Further, the agricultural working machine 1 is fixedly attached to both end portions in the left-right direction, that is, the end portion of the central working portion 11 on the extension working portion 12 side, that is, for example, the case reinforcing portion 22 and the bracket portion 24. In the unfolding operation state, the soil of the outer soil uplifting portion 6 out of the pair of the soil uplifting portions 6 formed on the surface of the field by running of the tractor in a state of being aligned with the extension side mulcher 61 is lifted up. A center side earthing body 62 that approaches the traveling trace concave portion 5 located adjacent to the portion 6 is provided.

  And in this agricultural working machine 1, when the extension working part 12 is in the unfolding operation state, the front side of the extension side 61 61 and the front side 62a of the front side of the central side 62 are directed obliquely inward rearward. It is located on the same plane (including substantially the same plane) along the tilt direction. Further, the center side mulcher 62 is positioned so as to cover the front portion of the center side clutch 27 of the center working unit 11.

  Here, first, the extension side mulching body 61 will be described. As shown in FIGS. 4B, 5B, and 6, the left side extension mulching body 61 is fixed to the inner bracket portion 41. A vertical mounting plate portion 63 attached to the vertical plate, a vertical earthing plate portion 64 integrally projecting from the front end portion of the mounting plate portion 63 toward the front obliquely outer side, and the mounting plate portion 63 and the earthing plate portion A horizontal reinforcing plate portion 65 is provided between the mounting plate portion 63 and the earthing plate portion 64. In addition, on the front surface of the earthing plate portion 64, an earthing surface 61a for guiding the soil of the earth rising portion 6 rearward and obliquely inward and bringing it to the traveling trace concave portion 5 side is configured.

  In addition, the left extension side mulching body 61 and the right extension side mulching body 61 are symmetric (see FIG. 1).

  Further, as shown in FIGS. 4A, 5A, and 6, the left center side mulcher 62 is a vertical mounting plate fixedly attached to the outer surface of the case reinforcing portion 22. Portion 66, a vertical earthing plate portion 67 that integrally protrudes from the front end portion of the mounting plate portion 66 toward the front diagonally outer side and covers a part of the front side of the central clutch 27, and the mounting plate portion 66 and The mounting plate portion 66 and the horizontal reinforcing plate portion 68 are connected between the mounting plate portion 67 and the mounting plate portion 67.

  Further, on the front surface of the earthing plate portion 67, an earthing surface 62a for guiding the soil of the earth rising portion 6 rearward and obliquely inward and bringing it to the traveling trace concave portion 5 side is configured. As is apparent from FIG. 6, the earthing surface 62 a and the earthing surface 61 a of the extension side earthing body 61 are substantially in a straight line when the extension work unit 12 is in the unfolding operation state, and function as one continuous action surface. The area of the earthing surface 61a is larger than the area of the earthing surface 62a.

  The left center side mulching body 62 and the right center side mulcher 62 are symmetrical, but the vertical length of the left central side mulch body 62 is the vertical direction of the right center side mulch body 62. It differs only in that it is larger than the length dimension (see FIG. 1). Although not shown in the figure, the lengths in the vertical direction of the left and right center side mulchers 62 may be the same. Further, the attachment plate portion 66 of the right center side mulcher 62 is fixedly attached to the outer surface of the bracket portion 24.

  Next, the operation and the like of the farm work machine 1 will be described.

  For example, when working with the maximum working width, the left and right extension working parts 12 are rotated with respect to the central working part 11 about the turning central axis 10 to switch to the unfolding working state.

  When the extension working part 12 is in the unfolding work state, the center side clutch 27 of the tilling body 17 of the center working part 11 and the extension side clutch 47 of the extension tilling body 37 of the extension working part 12 are engaged. At the same time, the leveling body 18 of the central working unit 11 and the extended leveling body 38 of the extension working unit 12 are fitted and connected.

  In this state, when the tractor travels and the entire farm work machine 1 moves forward and the rotary shaft 26 of the cultivating body 17 of the central working unit 11 rotates, the rotational force of the rotary shaft 26 passes through both clutches 27 and 47. The rotation shaft 46 of the extended cultivating body 37 is rotated by the rotation shaft 46 of the extended cultivating body 37. As a result, the cultivating work is performed by the cultivating claws of the cultivating body 17 and the cultivating claws of the extending cultivating body 37.

  Further, at the rear of the tillage body 17 and the extended tillage body 37, the leveling work is performed by the leveling body 18 and the extension leveling body 38 that are connected to each other.

  Further, in front of the cultivating body 17 and the extended cultivating body 37, prior to the tilling work by the cultivating body 17, the leveling body 18, etc., the uplifting portion 6 is moved by the extended side mulching body 61 and the central side mulching body 62. Digging work that breaks down and backfills the running trace recess 5 is performed. In other words, the earth gathering surface 61a of the extension side earth gathering body 61 and the earth gathering surface 62a of the center side earth gathering body 62 are the outer earth rising parts 6 out of the earth raising parts 6 that form a pair on both the left and right sides of the running trace recess 5. The soil is brought closer to the travel trace recess 5 to fill the travel trace recess 5 back.

  For example, when working only with the central working unit 11 or when working with the central working unit 11 and either the left or right extension working unit 12, both the extension working unit 12 or either the left or right extension working unit 12 is used. It is rotated with respect to the central working unit 11 to switch to the folding non-working state. Then, the clutches 27 and 47 are disengaged from each other and the central clutch 27 is exposed. A part of the front side of the central clutch 27 is covered with the central bunker 62.

  And according to such a farming machine 1, the soil of the soil uphill part 6 formed in the field surface part by driving | running | working of a tractor is made into the travel trace recessed part 5 side by the extension side mulching body 61 and the center side mulching body 62. Therefore, the traveling trace recess 5 can be backfilled, and appropriate tillage work can be performed.

  In addition, since the extension side mulching body 61 and the central side mulching body 62 can bring the soil to escape to the extension work section 12 side to the central work section 11 side, a more appropriate tillage work can be performed.

  Further, when the extension working part 12 is in the unfolding operation state, the earthing face 61a of the extension side earthing body 61 and the earthing face 62a of the center side earthing body 62 are located on the same plane. Can be smoothly moved to the traveling trace recess 5 side, and more appropriate tillage work can be performed.

  Moreover, since the center side mulcher 62 is positioned so as to cover the front portion of the center side clutch 27 of the center working unit 11, the center side clutch 27 can be protected, and damage to the center side clutch 27 can be prevented.

  7 and 8 show a second embodiment.

  As in the second embodiment, a configuration may be employed in which the mulching plate portion 67 of the central side mulching body 62 covers the front portion of the entire central side clutch 27. In other words, in this configuration, the outer end portion of the center side lining body 62, that is, the outer end portion (tip end portion) of the mulching plate portion 67 is positioned outward from the center side clutch 27. In addition, the outer end portion of the center side mulcher 62 is close to the inner end portion of the mulcher plate 64 of the extension side mulcher 61 when the extended working portion 12 is in the unfolded state.

  In this configuration, the center side clutch 27 can be protected more appropriately, and damage to the center side clutch 27 can be effectively prevented. That is, for example, when only the central working unit 11 is operated, the central side clutch 27 does not hit the fence or concrete, and the central side mulching body 62 functions as a clutch guard. Can process grass and the like inside.

  FIG. 9 shows a third embodiment.

  As in the third embodiment, even if the mulching surface 61a of the extension side mulching body 61 protrudes slightly forward with respect to the mulching surface 62a of the central side mulching body 62, the resistance of the soil flow is reduced. In other words, it is possible to smoothly move the soil of the soil build-up portion 6 toward the traveling trace recess 5 side.

  Furthermore, FIG. 10 and FIG. 11 show a fourth embodiment.

  As in the fourth embodiment, the center side mulching body 62 is not provided, and the mulching work for bringing the soil of the soil uplift portion 6 to the traveling trace concave portion 5 side only by the extension side mulching body 61 is also performed. Good. The extension side mulching body 61 is fixedly attached to the inner end portion which is the end portion of the extension working portion 12 on the central working portion 11 side, that is, the front surface of the inner end portion of the tillage cover portion 43, for example.

  The extension side mulching body 61 includes a vertical mounting plate portion 70 having a substantially L-shaped cross section fixedly attached to the front surface of the inner end portion of the tillage cover portion 43, and a front diagonally outer side from the front end portion of the mounting plate portion 70. A vertical first squeeze plate portion 71 projecting integrally toward the direction, and a vertical shape projecting integrally from the front end portion of the mounting plate portion 70 toward the diagonally rearward inner side and positioned in front of the central working portion 11 It has a second lining plate portion 72, and a horizontal reinforcing plate portion 73 that is installed between the mounting plate portion 70 and the second lining plate portion 72 and connects the mounting plate portion 70 and the lining plate portion 72. In addition, on the front surfaces of both the soil gathering plate portions 71 and 72, a soil gathering surface 74 that guides the soil of the soil rising portion 6 rearward and obliquely inward and brings it closer to the travel trace recess 5 side is configured. Note that, for example, such an extension side mulcher 61 may be attached to the inner bracket portion 41 of the extension working portion 12.

  On the other hand, in the first embodiment and the like, the configuration in which the extension side mulcher 61 is attached to the inner bracket portion 41 and the center side mulcher 62 is attached to the case reinforcing portion 22 and the bracket portion 24 has been described. However, for example, the extension side mulcher 61 may be attached to the front surface of the tillage cover portion 43 of the extension body 36, and the center side mulcher 62 may be attached to the front surface of the tillage cover portion 25 of the body 16.

  In any of the embodiments, for example, the configuration is not limited to the three-fold folding configuration, and may be a configuration including the central working unit 11 and one of the left and right extending working units 12, for example.

1 Agricultural working machine 5 Travel trace recess 6 Soil uplift
11 Central working department
12 Extension section
61 Extension side mulcher
71 1st pallet board
72 Second slabboard

Claims (3)

A central working unit that is connected to the traveling vehicle and performs the tilling work,
Provided in this central working part, can be selectively switched between the folding non-working state and the unfolding working state, and in the unfolding working state, an extension working part that performs the tilling work,
An extension side earthing body provided at an end of the extension working part on the side of the central working part and for bringing the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle toward the traveling trace recess side. ,
Agricultural work machine that performs a mulching work to bring the soil of the soil uplift formed on the surface of the field by traveling of the traveling vehicle only to the extension side mulcher, to the traveling trace recess side,
The extension side mulcher is attached to the front surface of the inner end of the tillage cover part of the extension work part. A central working unit that is connected to the traveling vehicle and performs the tilling work,
Provided in this central working part, can be selectively switched between the folding non-working state and the unfolding working state, and in the unfolding working state, an extension working part that performs the tilling work,
An extension side earthing body provided at an end of the extension working part on the side of the central working part and for bringing the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle toward the traveling trace recess side. ,
Agricultural work machine that performs a mulching work to bring the soil of the soil uplift formed on the surface of the field by traveling of the traveling vehicle only to the extension side mulcher, to the traveling trace recess side,
The extension side mulcher is attached to an inner bracket part of the extension work part. A central working unit that is connected to the traveling vehicle and performs the tilling work,
Provided in this central working part, can be selectively switched between the folding non-working state and the unfolding working state, and in the unfolding working state, an extension working part that performs the tilling work,
An extension side earthing body provided at an end of the extension working part on the side of the central working part and for bringing the soil of the soil uplift formed on the surface of the field by the traveling of the traveling vehicle toward the traveling trace recess side. ,
Agricultural work machine that performs a mulching work to bring the soil of the soil uplift formed on the surface of the field by traveling of the traveling vehicle only to the extension side mulcher, to the traveling trace recess side,
The extended side bunker is
A first mulch plate located in front of the extension working part;
A farm working machine comprising: a second digging plate portion located in front of the central working portion.

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