Agricultural machinery

Abstract

To provide an agricultural machine capable of reducing the burden on an operator.SOLUTION: An agricultural machine 1 includes a cultivation body 32 that performs cultivation work, and a land-leveling body 33 that performs land-leveling work at the rear of the cultivation body 32. The land-leveling body 33 includes a first land-leveling body 43, and a second land-leveling body 44 rotatably connected to a lower end of the first land-leveling body 43. The second land-leveling body 44 includes a support member 61, and a land-leveling member 62 attached to the support member 61 attachably to and detachably from the support member 61.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an agricultural work machine that can reduce the burden on an operator. [Background technology]

[0002] BACKGROUND ART Conventionally, an agricultural work machine such as that described in Patent Document 1 below is known.

[0003] This conventional agricultural machine comprises a tilling body that performs tilling work and a leveling body that performs leveling work behind the tilling body, and this leveling body has a first leveling body (leveling plate) and a second leveling body (rake) attached to the rear end of the first leveling body.

[0004] The second leveling body is formed in an approximately plate-like shape with its longitudinal direction in the left-right direction and has a leveling main plate portion that performs leveling work in a horizontal position, and a plurality of protrusions that are arranged side by side at intervals along the left-right direction at the rear end of the leveling main plate portion and protrude downward from the underside of the leveling main plate portion. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-165364 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the above-mentioned conventional agricultural work machines, for example, the second ground leveling body is made up of multiple members welded together, so when replacement becomes necessary due to deformation, wear, or damage, the entire body must be replaced. Therefore, the cost required to replace the ground leveling body is high, which tends to be a heavy burden on workers such as farmers.

[0007] The present invention has been made in consideration of the above points, and has an object to provide an agricultural work machine that can reduce the burden on the worker. [Means for solving the problem]

[0008] The agricultural work machine of the present invention comprises a tilling body that performs tilling work and a leveling body that performs ground leveling work behind the tilling body, and the leveling body has a support member and a leveling member that is detachably attached to the support member.

[0009] In addition, the agricultural work machine of the present invention comprises a tilling body that performs tilling work and a leveling body that performs leveling work behind the tilling body, and the leveling body has a support member, a leveling member that is detachably attached to the support member, and a reinforcing member that clamps the support member together with the leveling member. [Effects of the Invention]

[0010] According to the present invention, the burden on the worker can be reduced. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view of an agricultural work machine according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] 3 is a cross-sectional view of a portion AA in FIG. 2. [Figure 4] FIG. 2 is a partial rear view of the second ground leveling body of the agricultural work machine. [Figure 5] FIG. 10 is an exploded perspective view of a second leveling body in the extension working section of the agricultural work machine. [Figure 6] This is a plan view of the second leveling body in the extension work section. [Figure 7] FIG. 7 is a cross-sectional view of the BB portion of FIG. 6. [Figure 8] FIG. 2 is an exploded perspective view of a second ground leveling body in the central working section of the agricultural work machine. [Figure 9] This is a plan view of the second leveling body in the central working section. [Figure 10] 10 is a cross-sectional view of the CC portion of FIG. 9. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described with reference to FIGS.

[0013] In the figure, reference numeral 1 denotes an agricultural work machine. This agricultural work machine 1 is connected to the rear of a tractor (not shown), which is a traveling vehicle, and is a tiller that can selectively perform agricultural work, such as plowing (plowing and leveling) and soiling (piling), while moving forward (in the direction of travel) through a field such as a rice paddy, as the tractor travels.

[0014] The agricultural work machine 1 is, for example, a folding work machine with a foldable three-part structure, and is equipped with a central work unit 2 that is detachably connected (attached) to a three-point link section at the rear of the tractor, extended work units (side work units) 3 that are provided at both left and right ends of the central work unit 2 and are rotatable up and down around a rotation center axis 5, and an electric hydraulic cylinder (cylinder section) 4 that is a rotation drive means that rotates the extended work unit 3 up and down relative to the central work unit 2.

[0015] Each of the left and right extension working units 3 is deployed by rotating in one direction (approximately 180 degrees in the opening direction) based on the extension and retraction action of the extendable electric hydraulic cylinder 4, and is folded by rotating in the other direction (approximately 180 degrees in the closing direction).

[0016] Therefore, the agricultural work machine 1 can be selectively switched between a state in which work is performed using only the central working unit 2, a state in which work is performed using the central working unit 2 and both the left and right extension working units 3, and a state in which work is performed using the central working unit 2 and only one of the left and right extension working units 3. The left extension working unit 3 and the right extension working unit 3 have the same basic configuration, except that they are configured symmetrically.

[0017] The central working unit 2 comprises a machine body (central machine body) 11 that is detachably connected to the three-point linkage section of the tractor, a tilling body (central tilling body) 12 that is rotatably mounted on the machine body 11 and performs tilling work while rotating in a predetermined direction, and a soil leveling body (central soil leveling body) 13 that is rotatably mounted in the vertical direction at the rear end of the tilling cover section 15 of the machine body 11 and performs soil leveling work behind the tilling body 12.

[0018] The machine body 11 has a three-point linkage 16 that is detachably connected to a three-point linkage of the tractor, and this three-point linkage 16 is composed of a top mast 17 and left and right lower arms 18, etc. The machine body 11 also has a transmission case 19 in the center in the left-right direction, and an input shaft 20 is rotatably mounted in this transmission case 19. The input shaft 20 is connected to the PTO shaft of the tractor via a joint. Power input from the input shaft to the PTO shaft is transmitted to the tillage body 12 by power transmission means (not shown).

[0019] The tilling body 12 has a left-right tilling shaft 21 that is driven to rotate in a predetermined direction based on power from the power transmission means, and a plurality of tilling tines 22 that are detachably attached to the tilling shaft 21. The upper part of the tilling body 12 is covered by a tilling cover part 15 of the machine body 11.

[0020] The soil leveling body 13 has a first soil leveling body (central leveling plate) 23, which is a substantially plate-shaped first soil leveling part attached to the rear end of the tillage cover part 15 of the machine body 11 so as to be rotatable up and down about a left-right axis 26, and a second soil leveling body (central rake) 24, which is a substantially plate-shaped second soil leveling part attached to the lower end of the first soil leveling body 23 so as to be rotatable up and down about a left-right axis 27. The first soil leveling body 23 has a large embedding member 28 that embeds buried objects (for example, miscellaneous matter such as grass and culms) in the soil of the field.

[0021] Each of the left and right extension working units 3 comprises a body (extended body) 31 that can rotate vertically around a rotation center axis (rotation fulcrum) 5 relative to the body 11 of the central working unit 2, a tilling body (extended tilling body) 32 that is rotatably mounted on this body 31 and performs tilling work together with the tilling body 12 of the central working unit 2 when the extension working unit 3 is in the extended state, and a ground leveling body (extended ground leveling body) 33 that is rotatably mounted on the rear end of the tilling cover part 35 of the body 31 and performs ground leveling work together with the ground leveling body 13 of the central working unit 2 when the extension working unit 3 is in the extended state.

[0022] Like the tiller body 12 of the central working unit 2, the tiller body 32 of the extended working unit 3 has a tiller shaft 41 extending in the left-right direction and a plurality of tiller tines 42 detachably attached to the tiller shaft 41. The upper part of the tiller body 32 is covered by the tiller cover part 35 of the machine body 31.

[0023] Similar to the leveling body 13 of the central working unit 2, the leveling body 33 of the extended working unit 3 has a first leveling body (extended leveling plate) 43, which is an approximately plate-shaped first leveling section attached to the rear end of the tillage cover section 35 of the body 31 so as to be rotatable in the vertical direction around a left-right axis, and a second leveling body (extended rake) 44, which is an approximately plate-shaped second leveling section attached to the lower end of the first leveling body 43 so as to be rotatable in the vertical direction around a left-right axis.

[0024] An auxiliary leveling plate (auxiliary rake) 45 is rotatably provided at the outer end of the second leveling body 44, and this auxiliary leveling plate 45 can be selectively switched between an unfolded state and a folded state by a switching device (side kit) 46 having a drive source such as a motor. The first leveling body 43 also has a large embedding member 48 that embeds buried objects (for example, miscellaneous matter such as grass and culms) in the soil of the field.

[0025] On the other hand, the central working unit 2 is equipped with a switching means 51 for selectively switching the second leveling body 24, 44 between a leveling work state (a free state in a horizontal position that can be rotated up and down) and an earthmoving work state (a locked state in an inclined position that cannot be rotated up and down).

[0026] The switching means 51 is capable of selectively switching (setting) between a first state, which is a leveling work state, and a second state, which is an earthmoving work state, by rotating the second leveling body 24, 44 relative to the first leveling body 23, 43 based on power from a drive source such as a motor, and the lower end of the switching arm 52 of this switching means 51 is rotatably attached to the second leveling body 24 of the central working unit 2.

[0027] Furthermore, the second leveling bodies 24, 44, which are the contact parts that come into contact with the field, are parts (composing at least a part of the leveling bodies) that are easily worn and deformed by contact with the soil in the field, especially during soil-pulling work, when soil-pulling work involves dragging the soil (including pebbles, etc.) in the field.

[0028] Furthermore, the extension work unit 3 is equipped with a connecting means 53 that connects the body 31 and the second leveling body 44, and the lower end of the connecting arm 54 of this connecting means 53 is rotatably attached to the second leveling body 44 of the extension work unit 3.

[0029] 5 to 7, the configuration of the second ground leveling body (right rake) 44 in the ground leveling body 33 of the right-side extension working unit 3 will be described in detail. Note that the second ground leveling body (left rake) 44 in the ground leveling body 33 of the left-side extension working unit 3 has a configuration symmetrical to the second ground leveling body (right rake) 44, so a detailed description thereof will be omitted.

[0030] As shown in Figures 5 to 7, the second leveling body 44 has a support member (frame member) 61 which is a longitudinal member extending in the left-right direction, and a plate-shaped leveling member 62 which is detachably attached to this support member 61 and which performs leveling work in a first horizontal position (leveling work position) when the second leveling body 44 is in a leveling work state, and which performs earthmoving work in a second inclined position (earthmoving work state) when the second leveling body 44 is in a earthmoving work state.

[0031] The second leveling body 44 also has a plurality of (e.g., three) reinforcing members 63 that clamp the support member 61 together with the leveling member 62 to reinforce the support member 61, and a plurality of (e.g., three) small embedding members 64 that are detachably attached to the leveling member 62 and that embed embedded objects (e.g., miscellaneous matter such as grass and culms) into the soil of the field when the second leveling body 44 is in a leveling work state.

[0032] The second leveling body 44 has mounting means 68 consisting of, for example, a plurality of bolts 66 and nuts 67, and by using this mounting means 68, the leveling members 62, reinforcing members 63 and embedded members 64 are individually and detachably attached and fixed to the support member 61, which is the base member. Furthermore, these mutually separable members 61, 62, 63, 64 are made of, for example, metal.

[0033] The support member 61 has a rectangular cylindrical portion 71 that is elongated in the left-right direction, and a fitting recess 72 that detachably fits with the fitting protrusion 132 of the central working unit 2 is integrally formed at the longitudinal end (inner end) of this cylindrical portion 71. Note that the fitting recess (fitting member) 72 may be detachably attached to the cylindrical portion (cylindrical member) 71, for example.

[0034] Furthermore, the cylindrical portion 71 has an upper plate portion 73, a lower plate portion 74, a front plate portion 75, and a rear plate portion 76, and a leveling plate connecting portion 81, an arm mounting portion 82, and an auxiliary leveling plate mounting portion 83 are integrally provided on the upper plate portion 73 of this cylindrical portion 71. The first leveling body (extended leveling plate) 43 is rotatably connected to the leveling plate connecting portion 81, the connecting arm 54 is rotatably attached to the arm mounting portion 82, and the auxiliary leveling plate 45 is rotatably attached to the auxiliary leveling plate mounting portion 83.

[0035] The leveling member 62 consists of, for example, only a single plate-shaped member, and has a leveling plate portion 91 (a working plate portion used for leveling work or earthmoving work) that contacts the underside of the lower plate portion 74 of the cylindrical portion 71 of the support member 61 and covers the entire underside.

[0036] As is clear from Figure 7, a front plate portion 92 protrudes upward from the front end of the leveling plate portion 91, contacting the front surface of the front plate portion 75 of the tubular portion 71 of the support member 61 and covering the entire front surface, and a protruding plate portion 93 protrudes forward from the upper end of this front plate portion 92, and a bolt hole 94 is formed in this protruding plate portion 93.

[0037] Furthermore, the leveling board portion 91 is formed with slit-shaped insertion holes 96 that penetrate the top and bottom surfaces of the leveling board portion 91, and the reinforcing member 63 is removably inserted into this insertion hole 96. Furthermore, the leveling board portion 91 is formed with a convex portion 97 that bulges downward and is longitudinal in the front-to-rear direction, and a triangular cutout portion 98 that opens rearward in a plan view is formed in a portion of the rear end of the leveling board portion 91 that is located between two adjacent convex portions 97.

[0038] Each reinforcing member 63 consists, for example, of only a single plate-shaped member, and has a first plate portion 101 that contacts the upper surface of the protruding plate portion 93 of the leveling member 62, a second plate portion 102 that contacts the upper surface of the upper plate portion 73 of the tubular portion 71 of the support member 61, a third plate portion 103 that contacts the rear surface of the rear plate portion 76 of the tubular portion 71 of the support member 61, and a fourth plate portion 104 that is located below the leveling plate portion 91 of the leveling member 62 and closely faces the underside of this leveling plate portion 91.

[0039] The first plate portion 101 is formed with a bolt hole 105 that communicates with the bolt hole 94 of the protruding plate portion 93 of the ground leveling member 62. The lower end of the third plate portion 103 is removably inserted into the insertion hole 96 of the ground leveling plate portion 91 of the ground leveling member 62, and the rear end of the fourth plate portion 104 is positioned forward of the cutout portion 98 of the ground leveling plate portion 91 of the ground leveling member 62.

[0040] In the illustrated example, the fourth plate portion 104 is not in contact with the underside of the ground leveling plate portion 91 (see FIG. 7), but it may be in contact with the underside of the ground leveling plate portion 91, or may be configured, for example, so that the fourth plate portion 104 does not protrude downward beyond the convex portion 97 of the ground leveling plate portion 91. Furthermore, it may be configured, for example, so that the reinforcing member 63 is welded to the tubular portion 71 of the support member 61.

[0041] Each embedding member 64 has an attachment plate portion 111 that is detachably attached to the ground leveling member 62, and a rod-shaped embedding portion 112 that is inserted into the insertion portions 116, 117 of the attachment plate portion 111 and embeds the embedded object, such as miscellaneous matter, into the soil of the field.

[0042] The mounting plate portion 111 is formed with bolt holes 115 that communicate with the bolt holes 94 of the protruding plate portion 93 of the ground leveling member 62. The embedded portion 112 is formed of, for example, an elastic rod (spring rake) 113 that can be elastically deformed.

[0043] Next, the configuration of the second ground leveling body (central rake) 24 in the ground leveling body 13 of the central working unit 2 on the central side will be described in detail with reference to FIGS.

[0044] As shown in Figures 8 to 10, the second leveling body 24 of the central working unit 2, like the second leveling body 44 of the extension working unit 3 described above, has a support member (frame member) 121 which is a longitudinal member extending in the left-right direction, and a plate-shaped leveling member 122 which is detachably attached to this support member 121 and performs leveling work in a first position, which is a horizontal position (leveling work position), when the second leveling body 24 is in a leveling work state, and performs earthmoving work in a second position, which is an inclined position (earthmoving work state), when the second leveling body 24 is in a pulling work state.

[0045] In addition, this second ground leveling body 24 has a plurality of (e.g., six) reinforcing members 123 (123a, 123b) that clamp the support member 121 together with the ground leveling member 122 to reinforce the support member 121, and a plurality of (e.g., four) small embedding members 124 that are detachably attached to the ground leveling member 122 and that embed embedded objects (e.g., miscellaneous matter such as grass and culms) into the soil of the field when the second ground leveling body 24 is in a ground leveling operation state.

[0046] The second ground leveling body 24 has attachment means 128 consisting of, for example, a plurality of bolts 126 and nuts 127, and by using this attachment means 128, the ground leveling members 122, reinforcing members 123, and embedded members 124 are individually and detachably attached and fixed to the support member 121, which is the base member. Furthermore, these mutually separable members 121, 122, 123, and 124 are made of, for example, metal.

[0047] Furthermore, in this second leveling body 24, multiple types, i.e., for example, two types of reinforcing members 123a and 123b with different shapes, are used, and one of the reinforcing members 123a is the same as the reinforcing member 63. The other reinforcing member 123b is intended to more firmly reinforce the left-right central side of the support member 121, which is longer and more easily deformed than the support member 61, and is larger than the one reinforcing member 123a and formed longitudinally in the left-right direction.

[0048] The support member 121 has a rectangular cylindrical portion 131 that is elongated in the left-right direction, and fitting protrusions 132 that detachably fit into fitting recesses 72 of the extension working unit 3 are integrally provided at both longitudinal ends of the cylindrical portion 131. Note that the fitting protrusions (fitting members) 132 may be detachably attached to the cylindrical portion (cylindrical member) 131, for example.

[0049] The cylindrical portion 131 has an upper plate portion 133, a lower plate portion 134, a front plate portion 135, and a rear plate portion 136, and a leveling plate connecting portion 141 and an arm mounting portion 142 are integrally provided on the upper plate portion 133 of the cylindrical portion 131. The first leveling body (central leveling plate) 43 is rotatably connected to the leveling plate connecting portion 141, and the switching arm 52 is rotatably attached to the arm mounting portion 142.

[0050] The leveling member 122 consists of, for example, only a single plate-shaped member, and has a leveling plate portion (working plate portion for performing leveling work or earthmoving work) 151 that contacts the underside of the lower plate portion 134 of the cylindrical portion 131 of the support member 121 and covers the entire underside.

[0051] As is clear from Figure 10, a front plate portion 152 protrudes upward from the front end of the leveling plate portion 151, contacting the front surface of the front plate portion 135 of the tubular portion 131 of the support member 121 and covering the entire front surface, and a protruding plate portion 153 protrudes forward from the upper end of this front plate portion 152, and a bolt hole 154 is formed in this protruding plate portion 153.

[0052] Further, the leveling board portion 151 is formed with slit-shaped insertion holes 156 penetrating the top and bottom surfaces of the leveling board portion 151, and the reinforcing member 123 is removably inserted into this insertion hole 156. Furthermore, the leveling board portion 151 is formed with a convex portion 157 that bulges downward and is longitudinal in the front-to-rear direction, and a triangular cutout portion 158 that opens rearward in a plan view is formed in a portion of the rear end of the leveling board portion 151 that is located between the two adjacent convex portions 157.

[0053] Each reinforcing member (first reinforcing member) 123a, like the reinforcing member 63, consists of, for example, only a single plate-shaped member, and has a first plate portion 161 that contacts the upper surface of the protruding plate portion 153 of the leveling member 122, a second plate portion 162 that contacts the upper surface of the upper plate portion 133 of the tubular portion 131 of the support member 121, a third plate portion 163 that contacts the rear surface of the rear plate portion 136 of the tubular portion 131 of the support member 121, and a fourth plate portion 164 that is located below the leveling plate portion 151 of the leveling member 122 and closely faces the underside of this leveling plate portion 151.

[0054] The first plate portion 161 is formed with a bolt hole 165 that communicates with the bolt hole 154 of the protruding plate portion 153 of the ground leveling member 122. The lower end of the third plate portion 163 is removably inserted into the insertion hole 156 of the ground leveling plate portion 151 of the ground leveling member 122, and the rear end of the fourth plate portion 164 is arranged forward of the cutout portion 158 of the ground leveling plate portion 151 of the ground leveling member 122.

[0055] Although the fourth plate portion 164 does not contact the lower surface of the leveling plate portion 151, it may be configured to contact the lower surface, or, for example, the fourth plate portion 164 may not protrude downward beyond the convex portion 157. Furthermore, for example, the reinforcing member 123a may be welded to the cylindrical portion 71 of the support member 61.

[0056] Each reinforcing member (second reinforcing member) 123b consists, for example, of only a single plate-shaped member, and has a first plate portion 181 that contacts the upper surface of the protruding plate portion 153 of the leveling member 122, a second plate portion 182 that contacts the upper surface of the upper plate portion 133 of the tubular portion 131 of the support member 121, a third plate portion 183 that contacts the rear surface of the rear plate portion 136 of the tubular portion 131 of the support member 121, and multiple (for example, three) fourth plate portions 184 that are located below the leveling plate portion 151 of the leveling member 122 and closely face the underside of this leveling plate portion 151.

[0057] The first plate portion 181 is formed with a bolt hole 185 that communicates with the bolt hole 154 of the protruding plate portion 153 of the ground leveling member 122. A predetermined portion of the lower end of the third plate portion 183 is removably inserted into the insertion hole 156 of the ground leveling plate portion 151 of the ground leveling member 122, and the rear end of the fourth plate portion 184 is arranged forward of the cutout portion 158 of the ground leveling plate portion 151 of the ground leveling member 122.

[0058] Although this fourth plate portion 184 does not contact the underside of the leveling plate portion 151, it may be configured to contact the underside. Also, for example, the reinforcing member 123b may be welded and fixed to the tubular portion 71 of the support member 61. Furthermore, although there are multiple reinforcing members 123b (for example, two) in the illustrated example, there may be only one.

[0059] Each embedding member 124 has an attachment plate portion 171 that is detachably attached to the ground leveling member 122, and a rod-shaped embedding portion 172 that is inserted into the insertion portions 176, 177 of the attachment plate portion 171 and embeds the embedded object, such as miscellaneous matter, in the soil of the field.

[0060] The mounting plate portion 171 is formed with bolt holes 175 that communicate with the bolt holes 154 of the protruding plate portion 153 of the ground leveling member 122. The embedded portion 172 is formed of, for example, an elastic rod (spring rake) 173 that can be elastically deformed.

[0061] Next, the operation of the agricultural work machine 1 according to the above embodiment will be described.

[0062] For example, when performing tilling work in a farm field (a water-filled rice paddy) using the central working unit 2 and the extended working unit 3, the second leveling bodies 24, 44 are set to the first state, which is the leveling work state (lying down position), and the agricultural work machine 1 is moved forward by driving the tractor.

[0063] As a result, the tilling bodies 12, 32 perform tilling work while being driven to rotate, and behind them the soil leveling bodies 13, 33, i.e., the first soil leveling bodies (levellers) 23, 43 and the second soil leveling bodies (rakes) 24, 44 perform soil leveling work. In this way, the agricultural work machine 1 performs puddling work.

[0064] On the other hand, when performing earthmoving work, which involves dragging and moving the soil in the field, rather than such puddling work, the second leveling bodies 24, 44 are set to the second state, which is the earthmoving work state (standing posture), and the agricultural work machine 1 is moved forward by driving the tractor. At this time, the tilling bodies 12, 32 may be driven to rotate, but they do not necessarily have to be driven to rotate and may be stopped.

[0065] Then, the second leveling body 24, 44 in the soil-pulling operation state moves forward while maintaining its inclined upright posture, and performs soil-pulling operation by pushing mud and other materials in the field forward with the leveling plate portions 91, 151 of the soil-pulling members 62, 122.

[0066] Here, if one of the parts constituting the second ground leveling body 24, 44, for example, a ground leveling member 62, 122, needs to be replaced due to deformation, wear, or damage, it is sufficient to replace only the ground leveling member 62, 122 that needs to be replaced.

[0067] That is, if a part of the ground leveling plate portion 91, 151 is deformed or the like, the fixation by the attachment means 68, 128 is released and the ground leveling member 62, 122 is removed from the support member 61, 121. Then, instead, a new ground leveling member 62, 122 can be attached and fixed to the support member 61, 121.

[0068] The same applies when the support members 61, 121, the reinforcing members 63, 123, or the embedded members 64, 124 are deformed, and only the members that need to be replaced need to be replaced.

[0069] Furthermore, according to such an agricultural work machine 1, the second leveling body 24, 44 of the leveling body 13, 33 in the working section 2, 3 has a support member 61, 121 and a leveling member 62, 122 that is detachably attached to this support member 61, 121. Therefore, unlike a configuration in which the support member and the leveling member are integrated by welding, for example, only the leveling member 62, 122 that needs to be replaced can be replaced individually, which means that the replacement cost is lower than if the entire unit were replaced, and the burden on the worker can be reduced.

[0070] Furthermore, for example, the support members 61, 121 and the leveling members 62, 122 can be separated and painted individually, so that the entire surface of each member 61, 62, 121, 122 can be painted, thereby appropriately preventing corrosion such as rust.

[0071] Furthermore, by preparing in advance other leveling members (multiple types of leveling members) that are different in shape, size, etc. from leveling members 62, 122, it is possible to freely select and change the leveling members to be attached to support members 61, 121 depending on the condition of the field and the work content, etc., thereby enabling appropriate work to be performed accordingly.

[0072] In addition, the second leveling body 24, 44 of the leveling body 13, 33 in the working section 2, 3 has reinforcing members 63, 123 that clamp the left-right longitudinal support member 61, 121 between the leveling members 62, 122 from above, below, and from the front, back, and back, so that the support member 61, 121 can be properly reinforced and deformation of the support member 61, 121 can be properly prevented.

[0073] In the above embodiment, the agricultural work machine is a folding work machine with a three-part structure, but it may also be, for example, a non-foldable single-piece work machine (harrow, rotary, etc.).

[0074] Furthermore, the leveling body is not limited to one having two leveling bodies (a leveling plate and a rake) rotatably connected to each other, but may be one consisting of, for example, a single leveling body.

[0075] Furthermore, the support members (pillar members) of the leveling body are not limited to those made of square pipes, but may also be made of rod-shaped members such as round bars, or lightweight structures, etc.

[0076] Furthermore, the members constituting the leveling body are preferably made of metal, but may be made of a material other than metal, such as hard resin.

[0077] Furthermore, the reinforcing member is not limited to being detachable from the support member, but may be integrated with the support member by welding or the like.

[0078] Furthermore, the leveling members and support members are not limited to being made up of a single plate-like member (long member) having a left-right length dimension corresponding to the working width of the working section (central working section, extended working section), but may also be made up of, for example, multiple divided plates lined up in the left-right direction (for example, a divided plate divided into two, left and right), in which case only the divided plate that needs to be replaced (part of the leveling member or part of the support member) can be replaced individually.

[0079] On the other hand, it is preferable that the left and right extension working units are configured symmetrically, but they may also be configured asymmetrically, for example.

[0080] Furthermore, it is preferable that the ground leveling body has embedding members that embed the object to be embedded into the soil of the field, but it may also be configured without embedding members, for example.

[0081] Furthermore, the shape of the notch portion of the ground leveling member is preferably triangular in plan view, but any other shape may be used.

[0082] Furthermore, the rear end of the reinforcing member is preferably positioned forward of the notched portion of the ground leveling member, but may also be positioned rearward of the notched portion of the ground leveling member, for example. [Explanation of symbols]

[0083] 1 Agricultural machinery 12,32 Cultivating body 13,33 Land leveling body 61,121 Support member 62,122 Ground leveling materials 63,123 Reinforcement members 64,124 Embedded materials 96,156 Through holes

Claims

1. A tilling body that does the tilling work, A leveling body that performs leveling work behind the tilling body, The leveling body includes a first leveling body and a second leveling body, The second leveling body is A support member; a ground leveling member detachably attached to the support member, The support member has a cylindrical portion that is elongated in the left-right direction. Agricultural machinery characterized by:

2. A tilling body that does the tilling work, A leveling body that performs leveling work behind the tilling body, The leveling body is A support member; a ground leveling member detachably attached to the support member; a reinforcing member that sandwiches the support member together with the ground leveling member, The ground leveling member has an insertion hole through which the reinforcing member is inserted. Agricultural machinery characterized by:

3. A tilling body that does the tilling work, A leveling body that performs leveling work behind the tilling body, The leveling body has a first leveling body and a second leveling body that is rotatable relative to the first leveling body, The second leveling body is a support member having a connecting portion rotatably connected to the first leveling body; a ground leveling member detachably attached to the support member, The support member has a cylindrical portion that is elongated in the left-right direction. Agricultural machinery characterized by:

4. The ground leveling member has a ground leveling plate portion formed with a plurality of downwardly bulging, longitudinally extending convex portions.

4. The agricultural machine according to claim 1, wherein the first and second axes are parallel to each other.

5. This is a tiller that can perform tilling and soil-pulling operations.

4. The agricultural machine according to claim 1, wherein the first and second axes are parallel to each other.

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