Agricultural working machine

Abstract

To provide a mowing working machine capable of preventing damage to an elastic plate.SOLUTION: A mowing working machine 1 is an agricultural working machine connected to a rear side of a tractor for use. The mowing working machine 1 comprises a working part 6 that is vertically rotatable. The working part 6 comprises a working body, an elastic plate 111 attached to a front plate 64 so as to cover the working body and provided with a slit 113, and a presser plate 112 that clamps the elastic plate 111 together with the front plate 64. A lower end of the presser plate 112 is positioned below an upper end of the slit 113 of the elastic plate 111.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an agricultural machine. [Background technology]

[0002] BACKGROUND ART Conventionally, a grass cutting machine (grass cutting machine) which is an agricultural machine, is known, for example, as described in Patent Document 1 below.

[0003] This conventional mowing machine comprises, for example, a working body that performs mowing work while rotating in a predetermined direction, an elastic body such as a rubber tape with a slit that is attached to the attachment part of the cover body so as to cover the working body, and a pressure body that clamps the elastic body together with the attachment part. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-33037 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional grass cutting machine, for example, weeds or foreign objects before cutting can get into the slits of the elastic body and come into contact with the part of the elastic body facing the circular hole at the upper end of the slit, which can cause cracks to form in that part and damage the elastic body.

[0006] One of the objects of the embodiments of the present invention is to provide an agricultural work machine that can prevent damage to the elastic body. [Means for solving the problem]

[0007] An agricultural work machine according to an embodiment of the present invention comprises a work body that performs work while rotating, an elastic body that is attached to an attachment portion so as to cover the work body and has a slit, and a pressing body that clamps the elastic body together with the attachment portion, and the lower end of at least one of the pressing body and the attachment portion is located below the upper end of the slit in the elastic body.

[0008] In addition, an agricultural work machine according to an embodiment of the present invention comprises a work body that performs work while rotating, a cover body that has an attachment portion and covers the upper side of the work body, an elastic body that is attached to the attachment portion so as to cover the front side of the work body and has a slit, and a pressing body that clamps the elastic body together with the attachment portion, and the lower end of at least one of the pressing body and the attachment portion is located below the upper end of the slit in the elastic body. [Effects of the Invention]

[0009] According to the embodiment of the present invention, damage to the elastic body can be prevented. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a side view of a brush cutter according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] 1(a) is a front view of the working part of the same mowing machine, FIG. 1(b) is an enlarged view of part A, and FIG. 1(c) is an enlarged view of part A with a partial cutout. [Figure 4] FIG. 3B is a cross-sectional view taken along line BB in FIG. [Figure 5] 10A and 10B are explanatory diagrams of what happens when grass gets caught in a slit during operation, where FIG. 10A is a diagram of an embodiment of the same grass-cutting machine, and FIGS. 10B and 10C are diagrams of comparative examples. [Figure 6] FIG. 10 is a partial cross-sectional view of a brush cutter according to another embodiment of the present invention. [Figure 7] FIG. 10 is a partial cross-sectional view of a brush cutter according to still another embodiment of the present invention. [Figure 8]FIG. 10 is a partial front view of a brush cutter according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

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

[0012] In the drawing, reference numeral 1 denotes a grass cutting machine, which is an agricultural work machine, and this grass cutting machine 1 is a flail mower that is used by being connected (mounted) to the rear of a tractor (not shown), which is a traveling vehicle.

[0013] That is, the mowing machine 1 is detachably connected to the rear of the tractor, and moves forward (in the direction of travel) as the tractor travels, performing predetermined work, i.e., mowing work (agricultural work).

[0014] More specifically, the grass cutting implement 1 is connected to a three-point linkage (agricultural implement mounting device) at the rear of the tractor, and moves forward as the tractor travels forward, cutting and shredding the grass to be cut (for example, weeds, straw, second ears of wheat, green manure, etc.). The grass cutting implement 1 is an offset implement that can be offset to the side of the tractor, i.e., to the right, for example.

[0015] As shown in Figures 1 and 2, the mowing machine 1 comprises an attachment section 5 that is detachably connected (attached) to a three-point link section at the rear of the tractor, a working section (mowing working section) 6 that can be changed between a stored state and an offset state and can also be changed between a horizontal position and an inclined position, and that mainly performs mowing work in a desired offset state, and a connecting section (offset mechanism section) 7 that connects the front and rear attachment sections 5 and the working section 6.

[0016] The mowing machine 1 also includes an operating unit (not shown) such as a remote control operated by an operator on the tractor, a drive unit 12 for moving the working unit 6 to change the state and posture of the working unit 6, a first detection unit 13 for detecting the offset amount of the working unit 6 relative to the tractor (the state of the working unit), a second detection unit 14 for detecting the posture angle of the working unit 6 relative to the tractor (the posture of the working unit), and a control unit (control box) 15 for controlling the drive unit 12 based on information (signals) from the first detection unit 13, the second detection unit 14 and the operating unit, etc.

[0017] The drive unit 12 has a first cylinder (offset cylinder) 16, which is an extendable and retractable first drive means for offsetting that moves the working unit 6 left and right relative to the mounting unit 5, and a second cylinder (tilt cylinder) 17, which is an extendable and retractable second drive means for changing posture that rotates the working unit 6 up and down about a rotation center axis (rotation fulcrum) 11 in the front-to-rear direction relative to the connecting unit 7. Each of the cylinders 16, 17 is, for example, an electric hydraulic cylinder. Each of the detectors 13, 14 is, for example, a potentiometer.

[0018] Here, the working unit 6 can perform grass cutting not only in the offset state but also in a stored state where it is stored in the rear of the tractor. The stored state is a state where the working unit 6 is located in a stored position at the rear of the tractor (a position where substantially the entire working unit 6 is stored within the width of the tractor). The offset state is a state where the working unit 6 is located in an offset position that is shifted to the right by a desired offset amount (movement amount) from the stored position at the rear of the tractor.

[0019] The working unit 6 can be moved left and right relative to the tractor (mounting unit) between the storage position and the maximum offset position by extending and retracting the first cylinder 16, and can be positioned at either of these positions or at any position between them.

[0020] Furthermore, at least in the offset state, the working unit 6 can perform grass cutting work in either a horizontal position along the horizontal left-right direction or an upward or downward inclined position (an upward inclined position with the left low and the right high and a downward inclined position with the left high and the right low).

[0021] The working unit 6 can be rotated up and down around the longitudinal pivot axis 11 relative to the tractor (mounting unit) by extending and retracting the second cylinder 17 between the maximum upward tilt position (the highest position where the right end of the working unit is located) and the maximum downward tilt position (the lowest position where the right end of the working unit is located), and can be positioned at either of these positions and any position between them (including a horizontal position corresponding to a horizontal posture).

[0022] In addition, an operator sitting in the driver's seat of the tractor can rotate the working unit 6 up and down around the rotation center axis 11 between the maximum upward tilt position (e.g., tilt angle of 70°) and the maximum downward tilt position (e.g., tilt angle of 55°) (including the horizontal position) by operating the operating unit to extend and retract the second cylinder 17, regardless of whether the tractor is in the stored state or the offset state.

[0023] The mounting unit 5 has a hitch frame 21, which is a mounting frame, and a three-point connecting unit 22 that is detachably connected to a three-point link unit at the rear of the tractor is provided on the hitch frame 21. The three-point connecting unit 22 has a top mast 24 that holds a top pin 23, and a pair of left and right lower arms 26 that hold lower pins 25.

[0024] The hitch frame 21 is also provided with an input shaft holder 29 that rotatably holds an input shaft 28 that receives power from the tractor. The input shaft 28 is connected to a PTO shaft of the tractor (not shown) via a joint, and inputs power from the PTO shaft to the brush cutter 1. Furthermore, an arm attachment portion 30 is provided on the right side of the hitch frame 21.

[0025] The connecting portion 7 has two pivoting arms (parallel links) 41 whose front ends are rotatably attached to the arm mounting portion 30 via axes 46, and the rear ends of each connecting arm 41 are rotatably attached to the arm mounting member 42 via axes 47.

[0026] Furthermore, a rotation central axis (rotation fulcrum) 11 in the front-to-rear direction is fixed to the arm attachment member (fulcrum frame) 42, and this rotation central axis 11 is held by a bearing member 31 of the working unit 6, and this bearing member 31 is rotatable about the rotation central axis 11. In other words, the working unit 6 is rotatable in the up-and-down direction about the round-shaft-shaped rotation central axis (central axis portion) 11 fixed to the arm attachment member (arm attachment portion) 42 of the connecting portion 7.

[0027] The second detector 14 detects the rotation angle of the bearing member 31 relative to the rotation center axis 11 of the connecting part 7, in other words, the vertical rotation angle of the working part 6 relative to the mounting part 5, and transmits this information to the control part 15. The first detector 13 detects the horizontal rotation angle of the connecting arm 41 relative to the mounting part 5, and transmits this information to the control part 15.

[0028] The arm mounting member 42 also has a cylinder mounting portion 43, to which the tip end of the rod 17a of the second cylinder 17 is rotatably mounted. The base end of the cylinder body 17b of the second cylinder 17 is rotatably mounted to a cylinder mounting base 48. The cylinder mounting base 48 is bolted to the top surface of the cover body 75 of the working unit 6.

[0029] The working unit 6 has a working body (grass-cutting working body) 51, which is a working means for performing grass-cutting work (cutting and shredding grass growing on the work surface) while rotating in a predetermined up-cut direction (the direction of the arrow in the figure), a cover means 52 for covering the working body 51, a gauge roller 50 which is a ground contact wheel arranged behind the working body 51, and a scraper 49 for removing deposits (soil, etc.) adhering to the gauge roller 50.

[0030] The working unit 6 also has a pulley case 53, which is a first transmission case body that houses a plurality of pulleys 56, 57, 58 and a belt 59, etc., and a gear case (transmission case) 54, which is a second transmission case body that houses a plurality of gears (not shown), etc.

[0031] The belt 59 in the pulley case 53 is wound around a drive pulley 56, a driven pulley 57, and a tension pulley 58, and the tension pulley 58 is biased by a tension spring 60, which serves as a biasing body. The biasing force of the tension spring 60 can be adjusted by a tension bolt 55.

[0032] An intermediate input shaft 61 is rotatably held by the gear case 54, and a power transmission means 62 that transmits power from the input shaft 28 is connected to the intermediate input shaft 61. The power input to the intermediate input shaft 61 from the power transmission means 62 is then transmitted to the working body 51, and as a result, the working body 51 is driven to rotate in a predetermined direction, that is, an up-cut direction, to perform grass cutting work.

[0033] The working body 51 has a rotating shaft 71 that is elongated in the left-right direction, and a plurality of working claws, or grass-cutting claws 74, that are detachably attached to a claw mounting portion 72 of the rotating shaft 71 via mounting members 73 and rotate in an up-cut direction to perform grass-cutting work.

[0034] The cover means 52 has a cover body 75 that is elongated in the left-right direction and is approximately plate-shaped, covering the upper side of the working body 51, and left and right cover side plates 76 that cover the lateral sides of the working body 51, and the rotation shaft 71 of the working body 51 is rotatably supported by these two cover side plates 76.

[0035] A lower side plate 77 is detachably provided at the bottom of each of the left and right cover side plates 76, and a pulley case 53 is fixed to the outer surface of the left cover side plate 76.

[0036] Furthermore, the cover body 75 has a rectangular cylindrical tubular portion 63 at its front end that is elongated in the left-right direction, and this tubular portion 63 is composed of a front plate 64, a rear plate 65, an upper plate 66, and a lower plate 67 (see FIG. 4). The front plate 64 is provided in a steeply inclined shape, for example, with a low front and a high rear.

[0037] On the other hand, the brush cutter 1 is equipped with a confirmation means 81 that allows an operator riding on the tractor to visually confirm the posture of the working unit 6 (the posture angle relative to the horizontal direction perpendicular to the direction of travel) from the tractor side.

[0038] The confirmation means 81 has a cover function that covers the upper side (upper part) of the rotation center axis 11, which is the rotation center of the working unit 6, and is arranged in a position near the rotation center axis 11 so as to cover the upper side of the rotation center axis 11.

[0039] The confirmation means 81 also has a rear cover member 83, which is a first member (rotating member) that rotates around the rotation center axis 11 together with the working unit 6 when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17, and a front cover member 84, which is a second member (non-rotating member) that does not rotate when the working unit 6 rotates based on the expansion and contraction of the second cylinder 17.

[0040] Furthermore, the rear cover member (bearing cover) 83 is attached to the working unit 6, and the front cover member (fulcrum cover) 84 is attached to the arm attachment member 42 of the connecting unit 7.

[0041] The front cover member 84 has a concave surface 92 that is recessed downward, and this concave surface 92 is provided with a reference mark (indicator mark) 93 that is visible to an operator riding on the tractor.

[0042] On the other hand, the rear cover member 83 has an arc-shaped surface (inclined surface) 102 that is sloping downward toward the front and is approximately a semicircular arc centered on the rotation center axis 11, and this arc-shaped surface 102 is provided with a plurality of marks (indicated marks that are scales for posture angles) 103 to 107 that can be seen by an operator riding on the tractor, for example 14 marks, which are positioned in a row at intervals in the arc direction (longitudinal direction) of the arc-shaped surface 102.

[0043] That is, one marker 103 for the horizontal position, one marker 104 for the maximum upward tilt position, one marker 105 for the maximum downward tilt position, six intermediate markers 106 for the upward tilt position, and five intermediate markers 107 for the downward tilt position are arranged side by side on the arc-shaped surface 102 of the rear cover member 83.

[0044] Here, when the working unit 6 is in a horizontal position, the horizontal posture mark 103 is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in a horizontal position.

[0045] The mark 104 for the maximum upward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum upward tilt posture in which it is positioned at the maximum upward tilt position (highest raised position).

[0046] The mark 105 for the maximum downward tilt posture is located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in the maximum downward tilt posture in which it is positioned at the maximum downward tilt position (lowest position).

[0047] The intermediate marks 106 for the upward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 104 for the maximum upward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate upward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum upward tilt position.

[0048] The intermediate marks 107 for the downward tilt position are provided at equal intervals (for example, 10° intervals) on the arc-shaped surface 102 in the portion between the mark 103 for the horizontal position and the mark 105 for the maximum downward tilt position, and are located at a position corresponding to the reference mark 93, i.e., for example, at a position closely facing the reference mark 93 (a position near the rear of the reference mark) when the working unit 6 is in an intermediate downward tilt position at an intermediate position (for example, 10°, 20°, etc.) between the horizontal position and the maximum downward tilt position.

[0049] Each of the marks 93, 103-107 of the confirmation means 81 is made of, for example, a sticker (a sheet-like member having an adhesive surface on the back side), and since it can be attached using the adhesive surface on the back side, its attachment position can be finely adjusted. Also, the marks 103-107 on the rear cover member 83 side may be, for example, a strip-shaped sticker (a sheet-like member having an adhesive surface on the back side) that can be attached along the arc-shaped surface 102, with the marks 103-107 displayed by printing or the like on the surface thereof.

[0050] As also shown in Figures 3 and 4, the working part 6 of the grass cutting machine 1 has an elastic plate 111, which is a plate-shaped elastic body that is elongated in the left-right direction and can be elastically deformed, attached to the front plate (mounting part) 64 of the cylindrical part 63 of the cover body 75 so as to cover the front side of the working body 51, and a pressure plate 112, which is a plate-shaped pressure body that is elongated in the left-right direction and clamps the elastic plate 111 together with the front plate 64.

[0051] The elastic plate 111 is a plate-like member (rubber plate) made of, for example, rubber (or may be made of, for example, resin), and the pressing plate 112 is a plate-like member (metal plate) made of, for example, metal. The cover body 75 is also made of, for example, metal, and the front plate (mounting plate) 64, which is a plate-like mounting portion of the cover body 75, is also a plate-like member (metal plate) made of metal.

[0052] The elastic plate 111 is a scattering prevention member that covers the front side of the working body 51 while it is rotating in the up-cut direction during grass cutting work by the working part 6, thereby preventing scattered objects (pebbles, soil, grass clippings, foreign objects, etc.) from the working body 51 from scattering forward.

[0053] The elastic plate 111 has a plurality of vertically elongated slits 113 positioned side by side at equal intervals in the left-right direction. In other words, the elastic plate 111 is formed with a plurality of slits 113 for facilitating elastic deformation of the elastic plate 111.

[0054] Each slit 113 has an open bottom end that opens downward, and has a vertically elongated slit portion (thin cut) 115 that extends linearly from the lower end of the elastic plate 111 upward to the upper end of the elastic plate 111, and a circular communicating hole portion 116 for stress dispersion that communicates with the upper end of this linear thin slit portion 115.

[0055] Furthermore, circular bolt holes 117, which are mounting holes, are formed in elastic plate 111 in portions located above each communicating hole portion 116 and near the upper corners of both left and right ends. Similarly, circular bolt holes 118, which are mounting holes, are formed in pressing plate 112 in portions facing each of bolt holes 117 in elastic plate 111.

[0056] The elastic plate 111 and the pressing plate 112 are detachably attached to the front plate 64 of the cover body 75 in an overlapping state by means of attachment means 122 consisting of, for example, bolts 119, nuts 120 and washers 121.

[0057] In other words, the bolt 119 of the mounting means 122 is inserted into both of the opposing, communicating bolt holes 117, 118, and the threaded shaft portion 123 of the bolt 119 is screwed into the nut 120, whereby the elastic plate 111 is attached to the front surface of the front plate 64 of the cover body 75 in a state where it is fastened together with the pressure plate 112.

[0058] In this way, the elastic plate 111 attached along the front surface of the front plate 64 of the cover body 75 by the attachment means 122 is held over its entire length between the pressing plate 112 and the front plate 64. The nut 120 of the attachment means 122 is fixed to the rear surface (back surface) of the front plate 64 by welding, for example.

[0059] In this mounted state, at least one of the presser plate 112 and the front plate (mounted portion) 64, that is, for example, only the lower end of the presser plate 112, is located below the upper end of the slit 113 of the elastic plate 111.

[0060] More specifically, the lower end of the pressure plate 112 is located lower than the communicating hole portion 116 at the upper end of the slit 113 of the elastic plate 111, and the lower end of the front plate 64 is located higher than the communicating hole portion 116 at the upper end of the slit 113 of the elastic plate 111.

[0061] Therefore, the entire communicating hole 116 is closed from the front side by the retaining plate 112. In other words, the circular front opening of the communicating hole 116 is always closed by the retaining plate 112, but the circular rear opening of the communicating hole 116 is always open toward the rear.

[0062] The distance L between the upper end of the communicating hole 116, which is the upper end of the slit 113, and the lower end (lower edge) of the presser plate 112 is, for example, 3 mm to 20 mm, and preferably 10 mm (see FIG. 4). As is clear from FIG. 4, the lower end (lower edge) of the presser plate 112 is located near the bottom of the communicating hole 116, and the lower end (lower edge) of the front plate 64 is located near the top of the communicating hole 116. As in the example shown in FIG. 4, a configuration in which the lower end of the presser plate 112 is located below the lower end of the circular communicating hole 116 is preferred, but this configuration is not necessarily limited to this, and any configuration will do as long as the lower end of the presser plate 112 is located below the upper end of the communicating hole 116 (the upper end of the slit 113).

[0063] On the other hand, the working unit 6 of the grass cutting machine 1 has a plate-shaped cylinder cover member 125 that covers the front side of the second cylinder 17 for rotating the working unit 6 in the vertical direction around the rotation center axis 11.

[0064] The cylinder cover member 125 is detachably attached to the front plate 64 of the cover body 75 in a state in which it is fastened together with the presser plate 112 and the elastic plate 111 by the attachment means 122 .

[0065] This cylinder cover member 125 prevents, for example, tall weeds or grass clippings bounced back from the front side from coming into contact with the second cylinder 17, wiring, etc.

[0066] Next, the operation of the brush cutting machine 1 will be described.

[0067] When the tractor with the grass cutting implement 1 connected to the rear is driven forward to move the grass cutting implement 1 forward (in the direction of travel), the working body 51 of the working section 6 performs grass cutting work while rotating in the predetermined direction, that is, the up-cut direction.

[0068] During such work, as shown in Figure 5(a), even if, for example, tall weeds before cutting get caught in the slit portion 115 of the slit 113 of the elastic plate 111 from the front side, the weeds will come into contact (abut) with the lower end of the pressure plate 112 and will not get into the communicating hole portion 116 of the slit 113.

[0069] Therefore, the weeds before cutting do not come into direct contact with the part of the elastic plate 111 facing the communication hole part 116.

[0070] In contrast, as shown in Figures 5(b) and (c), in the case of a configuration (comparison example) using a pressure plate 112 (112a) whose lower end is located above the communicating hole portion 116, the weeds before being cut come into direct contact (abutment) with the portion of the elastic plate 111 facing the communicating hole portion 116 (the peripheral portion surrounding the communicating hole portion) 110, and such repeated abutment causes cracks to form in that portion 110, damaging the elastic plate 111.

[0071] Furthermore, with this type of grass cutting machine 1, the lower end of the pressure plate 112 is positioned below the communicating hole portion 116 (circular hole portion for dispersing stress) at the upper end of the slit 113 in the elastic plate 111, so that, for example, during operation, grass or the like before cutting will not enter the communicating hole portion 116 and come into contact with the part of the elastic plate 111 facing the communicating hole portion 116. Therefore, cracks will not occur in the part facing the communicating hole portion 116, and damage to the elastic plate 111 can be prevented, thereby improving the durability of the elastic plate 111.

[0072] Furthermore, the communication hole portion 116 located at the upper end of the slit 113 of the elastic plate 111 is closed and covered from the front side by the pressing plate 112, which further prevents damage to the elastic plate 111.

[0073] Furthermore, the tractor is provided with a confirmation means 81 that allows the operator on the tractor to visually confirm the posture of the working unit 6, and this confirmation means 81 is located in the vicinity of the rotation center axis 11, which is the rotation fulcrum of the working unit 6. Therefore, by using the confirmation means 81, the operator on the tractor can easily and appropriately confirm the posture of the working unit 6 from the tractor side without relying solely on their senses, thereby improving operability, etc.

[0074] In the above embodiment, a configuration was described in which the lower end of the pressure plate 112 is located below the communicating hole portion 116 at the upper end of the slit 113 in the elastic plate 111, and the lower end of the front plate 64 is located above the communicating hole portion 116 at the upper end of the slit 113 in the elastic plate 111. However, this is not limited to this, and for example, as shown in Figure 6, a configuration is also possible in which the lower end of the pressure plate 112 (112a) is located above the communicating hole portion 116 at the upper end of the slit 113 in the elastic plate 111, and the lower end of the front plate 64 (64a) is located below the communicating hole portion 116 at the upper end of the slit 113 in the elastic plate 111.

[0075] 7, the lower ends of both the pressing plate 112 and the front plate 64 (64a) may be positioned lower than the communicating hole 116 at the upper end of the slit 113 of the elastic plate 111.

[0076] Furthermore, the elastic plate (elastic body) 111 such as a shatterproof rubber card is not limited to one having a bolt hole 117 which is a hole separate from the communicating hole portion 116, but may also have a communicating hole portion 116 (116a) which also serves as a bolt hole, as shown in Figure 8, for example.

[0077] Furthermore, the agricultural work machine is not limited to a grass cutting machine (grass cutter) that cuts grass on the work surface such as the ground or a field, but can also be, for example, a spreader that spreads a substance to be spread on the work surface, a harvester that harvests crops from the work surface, or any other machine such as a rotary or harrow.

[0078] Although several embodiments and modifications of the present invention have been described, it is also possible to combine the embodiments and modifications as appropriate without departing from the gist of the present invention. [Explanation of symbols]

[0079] 1. Grass cutting machine, which is an agricultural machine 51 Work Body 64 Front plate as the mounting part 75 Cover body 111 Elastic plate, an elastic body 112 Presser plate as a presser body 113 Slit 115 Slit section 116 Communication hole

Claims

1. A work body that works while rotating, an elastic body having a slit and attached to the attachment portion so as to cover the working body; a pressing body that holds the elastic body together with the mounting portion, The lower end of at least one of the pressing body and the attached portion is located below the upper end of the slit in the elastic body. Agricultural machinery characterized by:

2. A work body that works while rotating, a cover body having a mounting portion and covering an upper side of the working body; an elastic body having a slit and attached to the attachment portion so as to cover the front side of the working body; a pressing body that holds the elastic body together with the mounting portion, The lower end of at least one of the pressing body and the attached portion is located below the upper end of the slit in the elastic body. Agricultural machinery characterized by:

3. The slits in the elastic body are a vertically elongated slit portion extending upward from a lower end of the elastic body; a communication hole portion communicating with an upper end of the slit portion, The lower end of at least one of the pressing body and the attached portion is located below the communication hole portion.

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

4. The communicating hole of the slit in the elastic body is closed from the front side by the pressing body.

4. The agricultural implement according to claim 3.

5. The working body can perform grass cutting work in either a horizontal or inclined position.

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

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