Agricultural working machine

Abstract

To provide an agricultural implement capable of improving durability.SOLUTION: This farm working machine 1 is equipped with a central working part 2 connected to a tractor and right and left extended working parts rotatable to the central working part 2. Further, the central machine body 11 of the central working portion 2 has a frame pipe portion 24 which is elongated in the left-right direction. An electric wire cover body 72 covering the electric wire 71 and long in the lateral direction is detachably attached to the frame pipe part 24.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an agricultural machine. [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 work machine has a central working unit connected to the rear of a traveling vehicle such as a tractor, and left and right extension working units rotatably mounted on the central working unit and selectively switched between an extended working state and a folded non-working state. Each extension working unit is also provided with an extension leveling plate electric drive unit, and these extension leveling plate electric drive units are connected to electric wires such as harnesses. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-109868 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional agricultural work machines, the electric wires of the harnesses and the like are always exposed to the outside, and are therefore susceptible to deterioration over time due to, for example, direct sunlight, etc., which may pose a durability problem.

[0006] Therefore, one of the objects of the embodiments of the present invention is to provide an agricultural work machine that can be improved in durability. [Means for solving the problem]

[0007] An agricultural work machine according to an embodiment of the present invention comprises a machine body having a frame portion, electric wires at least a portion of which is positioned along the frame portion, and an electric wire cover body that covers the electric wires.

[0008] In addition, an agricultural work machine according to an embodiment of the present invention comprises a body having a frame portion elongated in the left-right direction, electric wires at least a portion of which is positioned along the frame portion, and an electric wire cover body elongated in the left-right direction that is detachably attached to the frame portion and covers the electric wires. [Effects of the Invention]

[0009] According to the embodiment of the present invention, durability can be improved. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side view of an agricultural work machine according to one embodiment of the present invention (the agricultural work machine in a folded state with the extended working section folded and in a non-working state). FIG. [Figure 2] FIG. 2 is a plan view of the same agricultural work machine (in an unfolded state with the extended work section in the unfolded working state). [Figure 3] FIG. 2 is a schematic partial perspective view of the same agricultural work machine. [Figure 4] 1A is a schematic partially exploded perspective view of the agricultural implement, and FIG. 1B is a side view of the electric wire cover body. [Figure 5] FIG. 2 is a schematic partial perspective view of the same agricultural work machine. [Figure 6] FIG. 2 is a schematic partially exploded perspective view of the same agricultural work machine. [Figure 7] FIG. 2 is a schematic partial cross-sectional view of the same agricultural work machine. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described with reference to FIGS.

[0012] In Figures 1 and 2, 1 is an agricultural work machine, and this agricultural work machine 1 is a harrow that is connected to the rear of a tractor (not shown), which is a vehicle that can travel on a field, and can selectively perform predetermined tasks, such as plowing (plowing) and soil removal, while moving forward (in the direction of travel) on the field as the tractor travels.

[0013] As shown in Figures 1 and 2, 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 to a three-point link unit at the rear of the tractor and is a work unit that performs specified work (plowing and toppling), left and right extension work units (side work units) 3 that are provided at both left and right ends of the central work unit 2 and can rotate up and down around a rotation center axis (rotation fulcrum) 5 and perform the specified work (plowing and toppling), and left and right rotation drive units 4 that rotate the extension work units 3 up and down relative to the central work unit 2 around the rotation center axis 5.

[0014] Each rotation drive unit 4 has a cylinder 7, which is an extendable drive means (actuator), for example, and this cylinder 7 is, for example, an electric hydraulic cylinder.

[0015] Each of the left and right extension working units (symmetrical left and right working units) 3 is placed in an unfolded working state by rotation in one direction (rotation of approximately 180 degrees in the unfolding direction) based on the extension operation of the cylinder 7, and is placed in a folded non-working state by rotation in the other direction (rotation of approximately 180 degrees in the folding direction) based on the contraction operation of the cylinder 7. In other words, each extension working unit 3 can be selectively switched between an unfolded working state and a folded non-working state by rotation based on the extension and contraction operation of the cylinder 7.

[0016] Therefore, the agricultural work machine 1 can be selectively switched (set) between a state in which a specified task is performed using only the central working unit 2, a state in which a specified task is performed using the central working unit 2 and both the left and right extension working units 3, and a state in which a specified task is performed using the central working unit 2 and either the left or right extension working unit 3.

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

[0018] The central leveling body 13 can be selectively switched between a leveling work state (leveling free state) and an earth-pulling work state (earth-pulling locked state) by the earth-pulling unit 61 described later; in the leveling work state, it performs leveling work, and in the earth-pulling work state, it performs earth-pulling work.

[0019] The central body 11 has a three-point linkage 15 that is detachably connected (attached) to a three-point linkage (agricultural work machine lifting support section) at the rear of the tractor.

[0020] The three-point connection part 15 can be connected to the three-point link part, for example, via a quick coupler (auto hitch) that is pre-attached to the three-point link part, and is composed of a top mast 17 having a top pin 16 that engages with the upper hook of the quick coupler, and left and right lower arms 19 having lower pins 18 that engage with the lower hooks of the quick coupler.

[0021] The central body 11 also has a transmission case portion 22, which is an input shaft holding portion that rotatably holds an input shaft 21 that is connected to the PTO shaft at the rear of the tractor via a joint, and the upper portion of the input shaft 21 is covered by an input shaft cover 23.

[0022] Furthermore, inner ends of frame pipes 24, which are cylindrical frames elongated in the left-right direction, are attached to the left and right sides of the transmission case 22. A chain case 25, which is a generally box-shaped support part, is attached to the outer end (left end) of the frame pipe 24 on the left side (frame part on one side) as viewed in the direction of travel. A bracket (not shown), which is a generally plate-shaped support part, is attached to the outer end (right end) of the frame pipe 24 on the right side (frame part on the other side) as viewed in the direction of travel.

[0023] The central tiller body 12 is rotatably supported by the chain case portion 25 and the bracket portion, which are the left and right support portions that are spaced apart and opposed to each other.

[0024] The central cultivator body 12 has a cultivator shaft 26, which is a longitudinal rotating shaft extending left and right and rotates in a predetermined direction based on power from the input shaft 21 side, and a plurality of cultivator tines 27 are removably attached to this cultivator shaft 26.

[0025] The upper part of the central tillage body 12 is covered by the tillage cover part 30 of the central machine body 11. A clutch member (one-side clutch) 28 for power transmission is attached to both left and right ends (outer left and right ends) of the tillage shaft 26 of the central tillage body 12.

[0026] The central leveling body 13 has a first leveling member (leveling plate) 31, which is approximately plate-shaped and is rotatable in the vertical direction at the rear end of the tillage cover section 30 of the central body 11, and a second leveling member (rake) 32, which is approximately plate-shaped and is rotatable in the vertical direction at the lower end of this first leveling member 31.

[0027] The extension working unit 3 comprises an extension body 41, which is a machine body mounted on both left and right ends of the central body 11 so as to be rotatable in the vertical direction around a rotation center axis 5; an extension tilling body 42, which is rotatably mounted on the extension body 41 and which performs tilling work by rotating in a predetermined direction (down-cutting direction) together with the central tilling body 12 when the extension working unit 3 is in the extended working state; and an extension leveling body 43, which is rotatably mounted on the extension body 41 so as to be rotatable in the vertical direction and which performs leveling work behind the extension tilling body 42 together with the central leveling body 13 when the extension working unit 3 is in the extended working state.

[0028] In addition, like the central leveling body 13, the extended leveling body 43 can be selectively switched between a leveling work state (leveling free state) and an earth-pulling work state (earth-pulling locked state) by the earth-pulling unit 61 described later, and in the leveling work state it performs leveling work, but in the earth-pulling work state it performs earth-pulling work.

[0029] The extension cultivator body 42 has a cultivator shaft 46, which is a longitudinal rotating shaft extending from left to right and rotates in a predetermined direction based on power from the central cultivator body 12 side, and a plurality of cultivator tines 47 are removably attached to this cultivator shaft 46.

[0030] When the extended working unit 3 is in the deployed working state, the upper part of the extended tilling body 42 is covered by the tilling cover part 50 of the extended machine body 41. The inner end of the tilling shaft 46 of each of the left and right extended tilling bodies 42 is provided with a power transmission clutch member (other-side clutch) 48 that can be disengaged with the clutch member 28 of the central tilling body 12.

[0031] The extended ground leveling body 43 has a substantially plate-shaped first ground leveling member (leveling plate) 51 that is vertically rotatable at the rear end of the tilling cover part 50 of the extended body 41, and a substantially plate-shaped second ground leveling member (rake) 52 that is vertically rotatable at the lower end of this first ground leveling member 51. In addition, an extended rake 53, which is a substantially plate-shaped extended ground leveling member, is rotatably provided at the outer end of the second ground leveling member 52.

[0032] On the other hand, as shown in FIG. 2, the agricultural work machine 1 is equipped with, in addition to the two left and right extendable drive means (actuators) 7 described above, a plurality of (e.g., five) drive means (actuators), such as one centrally located earth-pulling unit 61, two left and right pressure units 62, and two left and right extension rake drive units 63.

[0033] The earthmoving unit 61 is a drive means (actuator) that can selectively switch the soil leveling bodies 13, 43 between a soil leveling state and an earthmoving state. The pressure unit 62 is a drive means (actuator) that can urge the soil leveling bodies 13, 43 downward when they are in a soil leveling state during plowing. The extension rake drive unit 63 is a drive means (actuator) that can selectively switch the extension rake 53 between an extended working state and a folded non-working state when the extension working section 3 is in an extended working state. Note that these units 61, 62, 63 are all electrically operated, having, for example, an electric motor as a drive source.

[0034] Furthermore, as shown in Figure 2, the agricultural work machine 1 is equipped with an operating unit 66 that is operated by an operator sitting in the driver's seat of the tractor, two detection units 67 on the left and right that detect the amount of rotation of the extension work unit 3 based on the extension and contraction movement of the cylinder 7 of the rotation drive unit 4, and a control unit 68 that controls each actuator (cylinder 7, units 61, 62, 63) based on information (signals) from the operating unit 66 and the detection units 67.

[0035] The operation unit 66 is, for example, a remote control terminal having a touch panel that can be operated by a worker in the driver's seat of the tractor, but is not limited to this and may be, for example, a push-button remote control terminal or a communication terminal such as a mobile terminal (smartphone) with a predetermined app downloaded. The detection unit 67 is, for example, a potentiometer, but is not limited to this and may be, for example, a sensor such as an optical rotary encoder having a light-emitting element and a light-receiving element.

[0036] Furthermore, electric wires 71 connected to the control unit 68 are connected to each of the actuators (cylinder 7, units 61, 62, 63) and the detection unit (sensor) 67. In other words, the control unit 68 and a plurality of types of actuators (including sensors) are electrically connected via the electric wires 71. The electric wires 71 are, for example, a harness or the like made up of a plurality of wires (a bundle of wires) and connectors. Furthermore, for example, although not shown, power lines from the tractor side are connected to the control unit 68 and the actuators (including sensors).

[0037] At least a portion of the electric wires 71 connected to each actuator, etc., i.e., the majority (e.g., at least half or more) of the approximately straight central portion 71a of the electric wires 71 located on the central working unit 2 side, is located along the longitudinal direction (left-right direction) of the frame pipe portion 24 of the central body 11 and is covered and protected by a longitudinal electric wire cover body 72.

[0038] In other words, this agricultural work machine 1 is equipped with an electric wire (harness, etc.) 71, the majority of which is located along the frame pipe section 24, at least a portion of which is the central portion 71a located on the central working section 2 side, and multiple, for example, two identically shaped electric wire cover bodies 72 on the left and right, which are detachably attached to the frame pipe section 24 and which cover and protect the majority of the central portion 71a of the electric wire 71 located on the central working section 2 side (the left and right longitudinal portion of the electric wire that is located along the frame section).

[0039] The substantially linear extension side portion 71b of the electric wire 71 located on the extension working section 3 side passes through a cylindrical section 70 formed in the tilling cover section 50 of the extension body 41 and is connected to the extension rake drive unit 63. Relay boxes 73 for operating the cylinder 7, for example, are connected to two intermediate positions of the electric wire 71, and these relay boxes 73 also function as safety devices for the cylinder 7 and the electric wire 71 (breaker devices in case of high temperatures).

[0040] As shown in Figures 3 to 5, a plurality of mounting plates 76 are fixed to the outer surface of the frame pipe section 24 of the central body 11 of the central working section 2 by welding or the like, and each of these mounting plates 76 has a screw hole section 77 formed therein.

[0041] Then, bolts 78 are inserted into bolt holes 79 of the wire cover body 72 and screwed into threaded hole portions 77 of the mounting plate 76, thereby removably mounting the wire cover body 72 to the mounting plate 76. In other words, the wire cover body 72 is removably mounted to the frame pipe portion 24 via the mounting plate 76 using the bolts 78, which are mounting fixtures.

[0042] Thus, the wire cover body 72 is disposed horizontally adjacent to the lower rear side of the frame pipe portion 24, which is a longitudinal portion, along the frame pipe portion 24 from its inner end to its outer end, with the longitudinal direction of the wire cover body 72 coinciding with the left-right direction. The control unit 68 is disposed in close proximity to (close to) the wire cover body 72 on the front side of the wire cover body 72. The control unit 68 is also disposed to protrude forward and downward from the frame pipe portion 24 at a position to the side of a lower arm mounting plate (protruding part 90) described below, and is located above the tiller cover portion 30.

[0043] 3 to 5, the wire cover body 72 is made up of, for example, only a member having a substantially U-shaped cross section that opens upward. In other words, each of the left and right wire cover bodies 72 is made up of only a U-shaped member (single member) 80 that is elongated in the left-right direction and opens upward.

[0044] More specifically, the wire cover body 72 has a bottom plate portion 81 that is long in the left-right direction and has an inclined shape with a low front and a high rear, a front plate portion 82 that is long in the left-right direction and stands obliquely upward and forward at the front end of the bottom plate portion 81, and a rear plate portion 83 that is long in the left-right direction and stands obliquely upward and forward at the rear end of the bottom plate portion 81 and is taller than the front plate portion 82. Note that bolt holes (mounting holes) 79 through which bolts 78 can be inserted are formed at both left-right ends of the rear plate portion 83.

[0045] That is, this electric wire cover body 72 is composed only of an upwardly opening U-shaped member 80 having a bottom plate portion 81, a front plate portion 82, and a rear plate portion 83, and a portion of the electric wires 71 is stored and arranged in the internal space 80a within this U-shaped member 80.

[0046] A front corner 86 formed by the integral connection portion between the bottom plate portion 81 and the front plate portion 82 is located lower than a rear corner 87 formed by the integral connection portion between the bottom plate portion 81 and the rear plate portion 83. In other words, when the agricultural work machine 1 is in the working posture, the front corner 86 is located at the lowest end of the wire cover body 72.

[0047] As shown in FIG. 4(b), the angle α between the bottom plate 81 and the front plate 82 and the angle β between the bottom plate 81 and the rear plate 83 are both obtuse angles (including right angles). Therefore, the internal space 80a within the U-shaped member 80 is large, making it easy to store and arrange the electric wires 71 in the internal space 80a. In the illustrated example, the angle α is larger than the angle β. Furthermore, the inclination angle γ of the rear plate 83 relative to the horizontal in the working position is an acute angle. Therefore, the bolt holes 79 formed in the rear plate 83 face diagonally upward and rearward, making it easy to install and remove the bolts 78. In the illustrated example, the inclination angle δ of the front plate 82 relative to the horizontal in the working position is also an acute angle (δ<γ).

[0048] Furthermore, the wire cover body 72 has a plurality of (e.g., two different sized) wire insertion notches 91 (91a, 91b) which are wire insertion openings for inserting the wires 71, a plurality of (e.g., three equal sized) water discharge hole portions 92 which are water discharge openings for discharging water (e.g., rainwater, washing water during cleaning, muddy water from a field, etc.) that has entered the wire cover body 72 downward to the outside of the wire cover body 72, and a plurality of (e.g., two different sized) interference avoidance notches 93 (93a, 93b) which are interference avoidance openings for avoiding (preventing) interference with the protruding parts 90 (90a, 90b) protruding from the outer peripheral surface of the frame pipe portion 24.

[0049] One of the protruding parts 90 (90a) is a cylinder mounting plate, to which the cylinder 7 is attached. The other protruding part 90 (90b) is a lower arm mounting plate, to which the lower arm 19 is attached.

[0050] The rectangular cutouts 91, 93 are formed by cutting downward from the upper end at multiple locations spaced apart in the left-right direction at the upper end of the rear plate 83 of the wire cover body 72. On the other hand, the rectangular holes 92 are formed at multiple locations spaced apart in the left-right direction at the front corner 86 located at the bottom end of the wire cover body 72.

[0051] As shown in FIG. 3, one branch portion (branch portion for connecting to the pressurizing unit 62) 71c branched from the middle position of the central portion 71a of the electric wire 71 is inserted into one electric wire insertion notch 91 (91a), and another branch portion (branch portion for connecting to the cylinder 7) 71d branched from the middle position of the central portion 71a of the electric wire 71 is inserted into the other electric wire insertion notch 91 (91b).

[0052] Furthermore, one of the protruding parts 90 (90a), which is a cylinder mounting plate, is positioned in one of the interference avoidance cutouts 93 (93a), and the other of the protruding parts 90 (90b), which is a lower arm mounting plate, is positioned in the other interference avoidance cutout 93 (93b), thus preventing interference with each of the protruding parts 90.

[0053] 6 and 7, a plurality of mounting plates 100 are fixed by welding or the like to the outer peripheral surface of the frame pipe section 24 of the central body 11 of the central working section 2, and the control section 68 is detachably attached to these fixed, forward-protruding mounting plates 100. Each mounting plate 100 has a plurality of screw holes 99 formed in it and aligned in the fore-and-aft direction.

[0054] Here, the control unit 68 has, for example, a transceiver 101 which is a communication means for wirelessly communicating with the operation unit 66, a control box 102 which is a control means for exchanging information with the operation unit 66 via the transceiver 101 and controlling each actuator (cylinder 7, units 61, 62, 63) based on information from the operation unit 66 and the detection unit 67, a buzzer 103 which is a sound generating means for generating sounds such as warning sounds at predetermined times, and a box-shaped storage case 104 in which the transceiver 101, control box 102 and buzzer 103 are stored.

[0055] The storage case 104 has, for example, a case main body 106 that is open at the bottom and back, a rear cover 107 that is open at the top and front, and a base member 108 that supports from below the objects to be stored, namely, the transceiver 101, the control box 102, and the buzzer 103. The base member 108 is made of, for example, metal, and the case main body 106 and the rear cover 107 are made of, for example, resin, but the materials are not limited to these, and any material can be used for any of the components.

[0056] The base member 108 has a bottom plate portion 111, a front plate portion 112 erected at the front end portion of the bottom plate portion 111, and left and right side plate portions 113 erected at both side end portions of the bottom plate portion 111.

[0057] Bolt holes 115 are formed in the bottom plate portion 111, and nuts 116 are welded and fixed to the underside of the bottom plate portion 111. A rear-opening notch 117 and bolt holes 118 are formed in the side plate portion 113, and nuts 119 are welded and fixed to the inner surface of the side plate portion 113. A protruding plate 120 of one of the side plates 113 is formed with a harness fixing hole 120a for fixing a harness (not shown) connected to the transceiver 101 and the control box 102.

[0058] Bolt holes 121, 122, and 123 are formed in the transceiver 101, control box 102, and buzzer 103, respectively. Furthermore, a bolt hole 125 is formed in an L-shaped base plate 124 located between the transceiver 101 and control box 102, and a female thread collar 126 and a collar 127 are welded to the upper surface of the base plate 124.

[0059] Then, bolt 131 is inserted through bolt hole 123 of buzzer 103 and bolt hole 121 of transceiver 101 and screwed into female thread collar 126, and bolt 132 is inserted through bolt hole 121 of transceiver 101 and screwed into female thread collar 126, whereby transceiver 101 and buzzer 103 are assembled to base plate 124 to form assembled part 130.

[0060] Furthermore, bolt 133 is inserted through bolt hole 121 of transceiver 101, collar 127, bolt hole 125 of base plate 124, bolt hole 122 of control box 102, and bolt hole 115 of bottom plate portion 111 of base member 108 and screwed into nut 116, and bolt 134 is inserted through bolt hole 125 of base plate 124, bolt hole 122 of control box 102, and bolt hole 115 of bottom plate portion 111 of base member 108 and screwed into nut 116, and bolt 135 is inserted through bolt hole 122 of control box 102 and bolt hole 115 of bottom plate portion 111 of base member 108 and screwed into nut 116, thereby assembling assembly 130 and control box 102 to base member 108 in a state where they are stacked one on top of the other.

[0061] Furthermore, bolt 136 is inserted into bolt hole 118 in side plate portion 113 of base member 108 and screwed into screw hole portion 99 in mounting plate 100, and bolt 137 is inserted into notch 117 in side plate portion 113 of base member 108 and screwed into screw hole portion 99 in mounting plate 100, thereby removably attaching base member 108 supporting assembly 130 and control box 102 to mounting plate 100.

[0062] Since the side plate portion 113 of the base member 108 has a notch 117 formed therein, if only the bolt 136 is removed, the base member 108 can be slid relative to the remaining bolt 137 .

[0063] On the other hand, bolt holes 141 are formed in side plate portions 140 of case body 106, and side plate portions 140 have bulged portions 142 for bolt head protection to avoid interference with the heads of bolts 136, 137.

[0064] Then, bolt 143 is inserted through bolt hole 141 in side plate portion 140 of case body 106 and bolt hole 118 in side plate portion 113 of base member 108 and screwed into nut 119, and bolt 144 is inserted through bolt hole 141 in side plate portion 140 of case body 106 and notch 117 in side plate portion 113 of base member 108 and screwed into screw hole portion 99 of mounting plate 100, thereby detachably attaching case body 106 to base member 108 and mounting plate 100.

[0065] In addition, bolt holes 146 are formed in the side plate portions 145 of the rear cover 107, and an upwardly opening wire notch 148 is formed in the center position in the left-right direction of the upper end of the rear plate portion 147 of the rear cover 107.

[0066] Then, bolts 150 are inserted into bolt holes 146 in the side plate portions 145 of the rear cover 107 and screwed into the screw holes 99 in the mounting plate 100, thereby removably attaching the rear cover 107 to the mounting plate 100.

[0067] 7, a branched portion 71e (branched portion for connecting to the terminal portion 102a of the control box 102) branched from the intermediate position of the central portion 71a of the electric wire 71 is inserted into the electric wire notch (harness outlet) 148, which is an electric wire insertion opening for inserting the electric wire 71. In other words, the branched portion 71e, which is a part of the electric wire 71 connected to the terminal portion 102a of the control box 102, is inserted into the electric wire notch 148 of the rear cover 107.

[0068] As is clear from FIG. 7, the rear cover 107 is disposed below the frame pipe portion 24, and the electric wire cover body 72 is located in the rear vicinity of the rear cover 107.

[0069] Furthermore, an opening 151 of a predetermined size is present between the upper end of the front plate portion 82 of the wire cover body 72 and the cylindrical outer peripheral surface of the frame pipe portion 24, and the upper end of the rear plate portion 147 of the rear cover 107 is inserted into this opening 151. Therefore, a portion of the opening 151 is closed by the rear plate portion 147 of the rear cover 107.

[0070] Then, the branch portion 71e, which is part of the electric wire 71, passes through the interconnected electric wire notch 148 and opening 151 and enters the rear cover 107, and the tip of the branch portion 71e is connected to the terminal portion 102a of the control box 102.

[0071] The control unit 68, which is made up of the control box 102 and the like, is entirely disposed below the upper end of the frame pipe unit 24. In other words, the control unit 68 is disposed so as to protrude forward and downward from the frame pipe unit 24. On the other hand, the wire cover body 72 is disposed so as to protrude rearward and downward from the frame pipe unit 24. The control unit 68 and the wire cover body 72 are disposed close to each other, and the control unit 68 and the wire cover body 72 are continuous in a bottom view.

[0072] Next, the operation of the agricultural work machine 1 will be described.

[0073] For example, as shown in Figure 2, when the agricultural work machine 1 with the left and right extension working units 3 deployed moves forward in the field as the tractor travels, the tilling units 12, 42 perform tilling work, and behind them, the soil leveling units 13, 43 in the soil leveling work state perform soil leveling work. In this way, the central working unit 2 and the left and right extension working units 3 perform the specified plow work.

[0074] Furthermore, for example, when a worker (operator) riding on a tractor operates a button or the like on the operation unit 66, the control unit 68 appropriately controls the actuators (cylinder 7, units 61, 62, 63) electrically connected to the control unit 68 via electric wires 71 based on the information transmitted from the operation unit 66.

[0075] Furthermore, the above-described agricultural work machine 1 is equipped with a central body (body of the central working unit) 11 having a frame pipe section 24 that is elongated in the left-right direction, electric wires 71 at least a portion of which is positioned along the frame pipe section 24, and an electric wire cover body 72 that is elongated in the left-right direction and is detachably attached to the frame pipe section 24 and covers at least a portion of the electric wires 71.Therefore, the electric wires 71 of harnesses or the like covered by the electric wire cover body 72 are appropriately protected from, for example, direct sunlight when working in a field or high-pressure cleaning water when cleaning, thereby improving the durability of the electric wires 71.

[0076] Furthermore, the electric wires 71 can be easily positioned along the frame pipe portion 24 in a simple manner without using, for example, cable ties, etc., which makes wiring and replacement of the electric wires 71 easy and reduces the burden on the worker. Moreover, it is possible to prevent problems such as damage to the electric wires 71 due to overtightening of the cable ties or damage due to catching on loose electric wires 71.

[0077] Furthermore, since the electric wire cover body 72 is arranged along the frame pipe section 24 on the lower rear side of the frame pipe section 24 of the central body 11 of the central working unit 2, exposure of the branched portion of the electric wire 71 connecting to the actuator located on the rear side of the central body 11 can be reduced, and the durability of the electric wire 71 can be appropriately improved.

[0078] Furthermore, since the control unit 68 connected to the electric wire 71 is positioned close to the front side of the electric wire cover body 72, the exposure of the branched portion of the electric wire 71 connecting to the control box 102 of the control unit 68 can be reduced, and the durability of the electric wire 71 can be further improved appropriately.

[0079] Furthermore, the control unit 68 connected to the electric wire 71 is positioned so as to protrude forward and downward from the frame pipe section 24 of the central body 11, so there is no obstruction between the control unit 68 and the operating unit (remote control, smartphone, etc.) 66, allowing stable wireless communication between the two. In addition, the control unit 68 can be protected from vibrations of the agricultural machine 1 and muddy water in the field, and malfunctions such as damage to the control unit 68 can be prevented.

[0080] In the above embodiment, the configuration has been described in which the extension side portion of the electric wires of the harness or the like that is located on the extension working section side is located inside a tubular portion formed in the tillage cover portion of the extension machine body, but this is not limited to this. For example, if the extension machine body has a frame pipe portion that is a frame portion that is longitudinal in the left-right direction, the extension side portion of the electric wires may be positioned along the frame pipe portion and covered and protected by an electric wire cover body attached to the frame pipe portion.

[0081] Furthermore, the control unit storage case (control unit cover) has been described as having a wire notch, which is an opening for inserting wires, at a predetermined position on the rear surface (a predetermined position on the upper end of the rear plate portion of the rear cover), but this is not limited to this, and the wire insertion opening may be formed at a predetermined position on the side or bottom surface of the control unit storage case, for example.

[0082] Furthermore, the multiple (for example, two left and right) wire cover bodies (harness covers, etc.) are not limited to being identical, but may be different (for example, symmetrical or asymmetrical).

[0083] Further, for example, the wire cover may be fixed to the frame of the machine body, or the wire cover may be rotatably (openably and closably) mounted on the frame of the machine body.

[0084] Furthermore, the wire cover may be positioned in front of or above the frame depending on the positions of the actuator and the control unit.

[0085] On the other hand, the agricultural work machine is not limited to a folding work machine with a foldable three-part structure (a configuration having a central work section and left and right extended work sections), but may be, for example, a configuration having a work section connected to a traveling vehicle and an extended work section provided at only one of the left and right ends of the work section, or a single-piece configuration without an extended work section.

[0086] Furthermore, the leveling bodies (central leveling bodies, extended leveling bodies) used for leveling and earthmoving work are not limited to those having a first leveling member and a second leveling member, but may, for example, have only the first leveling member, or may be configured such that the leveling body is attached to the rear end of the tilling cover section (central tilling cover section, extended tilling cover section) via an elastic plate such as a rubber plate. [Explanation of symbols]

[0087] 1 Agricultural machinery 11 aircraft, the central aircraft 24 Frame pipe section, which is the frame section 68 Control Unit 71 Electric wire 72 Wire cover body 91 Wire insertion notch, which is an opening for inserting wires 92 Water discharge hole portion which is an opening for water discharge

Claims

1. an airframe having a frame portion; an electric wire at least a portion of which is located along the frame portion; a wire cover body that covers the wires; An agricultural machine characterized by comprising:

2. an aircraft body having a frame portion elongated in the left-right direction; an electric wire at least a portion of which is located along the frame portion; a wire cover body elongated in the left-right direction that is detachably provided on the frame portion and covers the wires; An agricultural machine characterized by comprising:

3. The wire cover is disposed along the frame on the lower rear side of the frame.

3. The agricultural machine according to claim 1 or 2.

4. The wire cover body has an opening for inserting the wire.

3. The agricultural machine according to claim 1 or 2.

5. The wire cover body has a water discharge opening for discharging water.

3. The agricultural machine according to claim 1 or 2.

6. The wire cover is made of a member with a roughly U-shaped cross section that opens upward.

3. The agricultural machine according to claim 1 or 2.

7. a control unit connected to the electric wire; The control unit is disposed adjacent to the front side of the wire cover body.

3. The agricultural machine according to claim 1 or 2.

8. The control unit is disposed so as to protrude forward from the frame unit.

8. The agricultural implement according to claim 7.

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