JP2015000043A - Farmwork machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a farmwork machine in which a foreign material is hard to twine onto the outer circumference side of a twining prevention body.SOLUTION: A farmwork machine 11 includes a rotary shaft body 13 rotating around a rotation center axis A. The rotary shaft body 13 is mounted with a plurality of claws 14. The outer circumference side of an axial end of the rotary shaft body 13 is provided with an annular twining prevention body 51 for preventing a foreign material from twining onto the rotary shaft body 13. The twining prevention body 51 has a projection 52 positioned in the outer side more than a virtual cylindrical surface centering on the rotation center axis A.

Description

  The present invention relates to an agricultural machine including an annular wrapping preventing body.

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

  This conventional farm work machine is connected to a rotating shaft body that rotates about a rotation center axis, a claw body that is attached to a claw mounting portion of the rotating shaft body with bolts and nuts, and a claw mounting portion of the rotating shaft body. And a perfect circular annular reinforcing ring that prevents wrapping of impurities (such as grass) around the rotating shaft.

Japanese Patent Laid-Open No. 2-195801

  However, in the conventional agricultural machine described above, impurities are likely to be wound around the outer periphery of the perfect circular annular reinforcing ring, and the wound impurities are firmly tightened based on the rotation of the rotating shaft body and are removed. There is a problem that it takes time and effort.

  That is, for example, as shown in FIG. 15, when the reinforcing ring 1 has a perfect circular ring shape, the contaminants a are easily wound around the outer peripheral surface of the reinforcing ring 1. It is tightly tightened based on the rotation of No. 2, and it takes time to remove it from the outer peripheral surface of the reinforcing ring 1.

  The present invention has been made in view of the above points, and it is difficult for the foreign matter to be wound around the outer periphery of the anti-winding body, and even if the foreign matter is wound, the agricultural machine capable of easily removing the wound foreign matter. The purpose is to provide.

  The agricultural machine according to claim 1 is a rotary shaft body that rotates around a rotation center axis, a claw body that is attached to the rotary shaft body, and an annular winding that prevents the foreign matter from being wound around the rotary shaft body. An anti-winding body, and the anti-winding body has a convex portion located on the outer side of the virtual cylindrical surface with the rotation center axis as the center.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the protrusion of the wrapping preventing body gradually increases in distance from the virtual cylindrical surface from the front end side in the rotational direction toward the rear end side in the rotational direction. It has a curved surface positioned so as to.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 1 or 2, wherein the winding preventing body is detachably attached to the rotating shaft body.

  The agricultural machine according to claim 4 is the agricultural machine according to claim 3, wherein the wrapping prevention body is detachably attached to the nail attachment portion of the rotary shaft body by the attaching means for attaching the nail body. It is.

  The agricultural machine according to claim 5 is the agricultural machine according to any one of claims 1 to 4, wherein the wrapping preventing body is attached so as to cover the outer peripheral surface of the axial end portion of the rotating shaft body. It is.

  The agricultural machine according to claim 6 is the agricultural machine according to any one of claims 1 to 5, wherein the wrapping preventing body has a plurality of preventing body constituting members, and a combination of the plurality of preventing body constituting members. The winding preventing body is formed in an annular shape.

  The agricultural machine according to claim 7 is the agricultural machine according to any one of claims 1 to 6, wherein each of the anti-winding bodies has an attachment portion formed at one end portion and a connecting portion formed at the other end portion. A pair of prevention member constituting members and a connecting member for connecting these two prevention member constituting members, and the attachment portions of the two prevention member constituting members are attached to the claw attaching portions of the rotating shaft body in a state where they are overlapped with each other. And the connection parts of both the said prevention body structural members are connected by the said connection member.

  According to the present invention, it is difficult for the foreign matter to be wound around the outer peripheral side of the wrapping preventing body, and even if the foreign matter is wound, the wound foreign matter can be easily removed.

It is a side view of the agricultural working machine which concerns on the 1st Embodiment of this invention. It is a front view of an agricultural working machine same as the above. It is a partial front view of a farm work machine same as the above. It is a partial side view of an agricultural working machine same as the above. (A) And (b) is a figure which shows one prevention body structural member of the winding prevention body of a farm working machine same as the above. (A) And (b) is a figure which shows the other prevention body structural member of the winding prevention body of an agricultural work machine same as the above. (A) thru | or (c) is an effect | action explanatory drawing of an agricultural work machine same as the above. It is a partial front view of the agricultural working machine which concerns on the 2nd Embodiment of this invention. It is a partial side view of an agricultural working machine same as the above. It is a figure which shows the prevention body structural member of the winding prevention body of an agricultural working machine same as the above. It is a figure which shows the receiving member of a winding prevention body same as the above. It is a partial side view of the agricultural machine based on the 3rd Embodiment of this invention. It is a partial side view of the agricultural machine based on the 4th Embodiment of this invention. It is a partial side view of the agricultural working machine which concerns on the 5th Embodiment of this invention. It is operation | movement explanatory drawing of the conventional agricultural machine.

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

  In the figure, 11 is an agricultural machine, which is connected to the rear part of a tractor (not shown), for example, a traveling vehicle, and mowing while moving forward (traveling direction) on the field by forward traveling of the tractor. This is a mowing machine (Flairmore) that works.

  As shown in FIG. 1 and FIG. 2, the farm work machine 11 includes a machine body 12 releasably connected to a three-point hitch part (work machine lifting support part) at the rear of the tractor, and a predetermined direction ( A rotating shaft 13 in the left-right direction that is provided so as to be rotatable in the rotation direction shown in FIG. 1 and the like and that rotates about a horizontal rotation center axis A, and for mowing that is movably attached to the rotating shaft 13. A plurality of nail bodies 14 are provided.

  The airframe 12 has a three-point connecting portion 16 that is releasably connected to a three-point hitch portion at the rear of the tractor (not shown). The three-point connecting part 16 has one top mast 17 connected to the upper link of the three-point hitch part of the tractor and two left and right lower arms 18 connected to the lower link of the three-point hitch part of the tractor. doing.

  The machine body 12 has an input shaft support portion 19 at the center in the left-right direction, and the input shaft 20 in the front-rear direction is rotatably supported by the input shaft support portion 19. The input shaft 20 is connected to the PTO shaft of the tractor via a joint, and power output from the PTO shaft is input to the input shaft 20. The input shaft 20 is connected to power transmission means 21 for transmitting the power input to the input shaft 20 to the rotary shaft body 13.

  The power transmission means 21 includes a transmission shaft 22, upper and lower pulleys 23, 24, an endless transmission belt 25 spanned between the pulleys 23, 24, and the like. The pulleys 23 and 24 and the transmission belt 25 are accommodated in a transmission case portion 26 located on the left end side (left side in the traveling direction) which is one end side in the left-right direction of the machine body 12. The transmission shaft 22 is disposed in a frame pipe portion 27 that protrudes laterally from the input shaft support portion 19.

  Further, the airframe 12 has a pair of left and right side plate portions 31 that are vertically positioned on both ends in the left-right direction of the airframe 12 and face each other apart from each other. Is rotatably supported. The upper part of the rotating shaft 13 is covered with a curved cover plate part 32.

  Each of the left and right side plate portions (rotating shaft body support portions) 31 has an upper plate 33, and the upper end portion of the lower plate 34 is attached to the inner surface of the lower end portion of the upper plate 33.

  As shown in FIG. 3, an outer boss (shaft support portion) 36 is fixedly projected on the lower outer surface of the upper plate 33, and an inner boss (shaft covering) is formed on the lower inner surface of the upper plate 33. Part) 37 is fixedly projected.

  The outer boss 36 is fixed to the upper plate 33 and the inner boss 37 by bolts 38. The outer boss 36 has a bearing portion 39 that rotatably supports the axial end portion of the rotary shaft 13 on the inner peripheral side. On the other hand, the inner boss 37 is formed in a cylindrical shape covering the axial end portion of the rotating shaft body 13, and the axial end portion of the rotating shaft body 13 is inserted into the inner boss 37.

  The upper plate 33, the lower plate 34, the outer boss 36, the inner boss 37, and the like constitute the side plate portion 31 of the machine body 12. A transmission case portion 26 is fixed to the outer surface side of the left side plate portion 31.

  The rotating shaft body 13 includes a rotating shaft portion 41 in the left-right direction that is supported horizontally at the lower portion of the side plate portions 31 of the machine body 12 so as to be rotatable.

  The rotary shaft portion 41 has a hollow shaft body portion 41a whose outer peripheral surface is formed into a cylindrical surface over the entire length, and projects from both axial end surfaces of the shaft body portion 41a. And a round shaft-shaped shaft end portion 41b that is rotatably supported.

  In addition, a plurality of claw attachment portions 42 project from the outer peripheral surface of the shaft main body portion 41 a of the rotating shaft portion 41 toward the radially outer side of the rotating shaft body 13. In other words, the claw attaching portions 42 are arranged at equal intervals in the spiral direction on the outer peripheral surface of the shaft body portion 41a of the rotating shaft portion 41 so as to be distributed and positioned over the entire length of the shaft body portion 41a of the rotating shaft portion 41. The claw attachment portions 42 are arranged at 90 ° intervals in the circumferential direction of the rotary shaft 13 in a side view. Further, each of these claw mounting portions 42 is constituted by, for example, a pair of opposing plates 43 that are spaced apart from each other on the left and right. Each counter plate 43 has a plate shape along the circumferential direction of the rotary shaft 13, and each counter plate 43 is formed with a circular insertion hole 44.

  A claw body 14, which is a plate-shaped cutting claw, is movably and detachably attached to each claw attachment portion 42 of the rotary shaft body 13 via an attachment means 46.

  Each claw body 14 is constituted by two plate-like plate blade members (claw constituent members) 14a bent at one intermediate position so as to form a cross-sectional shape, for example. Each plate blade member 14a has a substantially rectangular shape in a side view, and a longitudinal long hole 14b along the longitudinal direction of the plate blade member 14a is formed on the base end side of the plate blade member 14a. Yes.

  The attachment means 46 for attaching the claw body 14 to the claw attachment portion 42 includes, for example, a bolt 47 including a bolt shaft portion 47a and a bolt head portion 47b, and screwed into a screw groove portion of the bolt shaft portion 47a of the bolt 47. It is configured by a possible nut 48 and a U-shaped member (shackle) 49 which is a connecting member in which two base end sides are rotatably connected to the outer peripheral side of the bolt shaft portion 47a.

  The U-shaped member 49 is composed of two annular portions 49a forming an annular shape on the base end side, and a U-shaped portion 49b on the distal end side connecting the two annular portions 49a, and each annular portion 49a is inserted into a circular shape. A communication hole 49c is formed.

  The U-shaped portion 49b of the U-shaped member 49 is loosely inserted into the elongated hole 14b of the claw body 14, and the bolt shaft portion 47a of the bolt 47 is inserted into the insertion hole 49c of the annular portion 49a of the U-shaped member 49 and When the nut 48 is screwed into the bolt shaft portion 47a of the inserted bolt 47 through the insertion hole 44 of the claw mounting portion 42 of the rotary shaft body 13, the claw body 14 has the bolt 47, It is movably and detachably attached to the claw attachment portion 42 of the rotary shaft 13 via a nut 48 and a U-shaped member 49.

  That is, the claw bodies 14 are movably and detachably attached to all the claw attachment portions 42 of the rotary shaft body 13 via the attachment means 46. In this state, the U-shaped member 49 is rotatable about the bolt shaft portion 47a with respect to the bolt shaft portion 47a of the bolt 47 of the attachment means 46. Further, since the U-shaped portion 49b of the U-shaped member 49 is loosely inserted into the long hole 14b, the claw body 14 can slide along the U-shaped portion 49b and center on the U-shaped portion 49b. It can be turned. For this reason, for example, when the rotary shaft 13 rotates, the claw body 14 is in a state along the radial direction of the rotary shaft 13 based on the centrifugal force (see FIG. 3).

  Further, as shown in FIG. 1 to FIG. 4 and the like, the farm work machine 11 is detachably attached to the left and right axial ends of the rotary shaft body 13 by retrofitting, and is positioned near the inner surface of the corresponding side plate portion 31. In addition, a non-round circular anti-winding body 51 is provided for preventing a foreign object (for example, grass) a from being wound around the outer peripheral side of the axial end portion of the rotary shaft body 13.

  The anti-winding body 51 includes, for example, a side plate portion 31 of a claw mounting portion (a claw mounting portion located at an axial end portion of the rotating shaft body 13) 42 of the rotating shaft body 13 by mounting means 46 for mounting the claw body 14. The counter plate 43 on the side is attached so as to cover the outer peripheral surface of the axial end portion of the shaft main body portion 41 a of the rotating shaft portion 41 and the outer peripheral surface of the inner boss 37.

  The anti-winding body 51 is not formed in a perfect circular shape centering on the rotation center axis A, but is formed in a non-circular annular shape having convex portions 52 and concave portions 53 alternately arranged in the circumferential direction.

  That is, the anti-winding body 51 is separated from each other in a plurality of curved plate shapes located radially outward from the virtual cylindrical surface B centering on the rotation center axis A of the rotary shaft body 13, for example, in the circumferential direction. There are two convex portions 52 and a plurality of curved plate-like shapes positioned on the radially inner side of the virtual cylindrical surface B, that is, for example, two concave portions 53 separated from each other in the circumferential direction.

  Each convex portion 52 is a non-arc-shaped curved surface 55 positioned such that the distance from the virtual cylindrical surface B (the distance from the rotation center axis A) gradually increases from the front end side in the rotation direction toward the rear end side in the rotation direction. On the outer surface. In FIGS. 5 (a) and 6 (a), the convex portion 52 is a portion with a diagonal line rising to the right.

  Here, as is apparent from FIGS. 4 to 6, the winding preventing body 51 includes a plurality of substantially semicircular arcs divided in the circumferential direction, that is, for example, a pair of preventing body constituting members (dividing members) 56. And a connecting member (clamping member) 57 for connecting the tip portions of the two preventing member constituting members 56, and the anti-winding member 51 is formed into a non-circular shape by the combination of the two preventing member constituting members 56. It is formed in an annular shape.

  The connecting member 57, which is a connecting means, includes, for example, a connecting bolt 58 including a bolt shaft portion 58a and a bolt head portion 58b, and a connecting nut 59 that can be screwed into a thread groove portion of the bolt shaft portion 58a of the connecting bolt 58. It consists of and. Then, the connecting nuts 59 are screwed onto the connecting bolts 58, whereby both the preventing member constituting members 56 are fastened and fixed to the outer peripheral surface of the rotary shaft body 13.

  Each prevention member constituting member 56 includes, for example, a curved plate-shaped attachment plate portion 61, and a curved plate-like and long guard plate portion 62 fixed orthogonally to one surface of the attachment plate portion 61. Configured.

  The mounting plate 61 includes a curved plate 64 having a substantially semicircular arc shape having a contact surface 63 formed on the inner surface, which is in contact (pressure contact) with the outer peripheral surface of the axial end portion of the shaft main body portion 41a of the rotating shaft portion 41. A mounting plate 65 that is a mounting portion provided on the base end side that is one end side in the longitudinal direction of the plate 64, and a connecting portion that is integrally provided by bending on the distal end side that is the other end side in the longitudinal direction of the curved plate 64. And a certain connecting plate 66.

  The attachment plate 65 is formed with a circular insertion hole 65a through which the bolt shaft portion 47a of the bolt 47 is inserted. 5 has a stepped portion 67 between the mounting plate 65 and the curved plate 64, while the other preventing member constituting member 56 shown in FIG. The mounting plate 65 and the curved plate 64 are continuously located on the same plane.

  The connection plate 66 is formed with a circular insertion hole 66a through which the bolt shaft portion 58a of the connection bolt 58 is inserted. The connecting plate 66 has a plate shape along the axial direction of the rotary shaft body 13, but the attachment plate 65 has a plate shape along the circumferential direction of the rotary shaft body 13.

  The guard plate portion 62 is configured only by a substantially semicircular arc-shaped curved plate 70 that is located radially outward from the outer peripheral surface of the axial end portion of the shaft main body portion 41a of the rotating shaft portion 41. The curved plate 70 is obtained by, for example, bending a long and narrow rectangular plate material into a curved shape. By this curved plate 70, the outer peripheral surface of the axial end portion of the shaft body portion 41a of the rotating shaft portion 41 and the outer periphery of the inner boss 37 are obtained. The surface is covered.

  The curved plate 70 has a convex portion 52 located on the radially outer side from the virtual cylindrical surface B on the rear side in the rotational direction, and a concave portion located on the radially inner side from the virtual cylindrical surface B. 53 on the front side in the rotational direction. Further, the outer surface of the convex portion 52 is a curved surface 55 whose distance from the virtual cylindrical surface B gradually increases from the front end side in the rotation direction toward the rear end side in the rotation direction.

  As shown in FIG. 1, a grounding wheel 71 is provided at the rear of the machine body 12, and the height position of the grounding wheel 71 can be adjusted by operating the handle 72.

  Next, the operation and the like of the farm work machine 11 will be described.

  First, the case where the winding preventing body 51 is retrofitted to the rotating shaft body 13 will be described.

  In this case, the operator superimposes the mounting plate 65 of one prevention member constituting member 56 and the attachment plate 65 of the other prevention member constituting member 56 on each other, and attaches both of the overlapping attachment plates 65 to the bolt 47 and the nut. At 48, the rotating shaft body 13 is attached to the claw attaching portion 42.

  Thereafter, the connecting plate 66 of the one preventing member constituting member 56 and the connecting plate 66 of the other preventing member constituting member 56 are made to face each other, and both the facing connecting plates 66 are connected to the connecting bolt 58 and the connecting nut 59. Connect.

  In this way, the two prevention member constituting members 56 are combined into a non-circular annular shape, and the contact surface 63 of the mounting plate portion 61 of both prevention member constituting members 56 is the outer peripheral surface of the axial end portion of the rotating shaft 13. The outer peripheral surface of the axial end portion of the rotating shaft body 13 and the outer peripheral surface of the inner boss 37 are covered with the guard plate portions 62 of the two preventing member constituting members 56.

  And when mowing using the agricultural implement 11 with the anti-winding body 51 attached, the agricultural implement 11 is connected to the rear part of the tractor while moving in the advancing direction by the forward traveling of the tractor, The rotary shaft body 13 is rotated at a high speed in a predetermined direction by the power from.

  Then, the plurality of claws 14 cut the grass and the like vegetated on the field while rotating at a high speed in the predetermined rotation direction together with the rotary shaft 13.

  Here, the claw body 14 does not exist in the vicinity of the inner surface of the left and right side plate portions 31 of the machine body 12, so that the foreign matter a such as grass tries to wrap around the outer periphery side of the annular wrapping prevention body 51.

  However, the annular wrapping preventing body 51 is formed in a non-circular annular shape having convex portions 52 and concave portions 53 that are alternately arranged in the circumferential direction, and therefore imparts vibration to the foreign object a to be wound. However, the development of the wrapping of the foreign matter a is suppressed by spreading the foreign matter a. In other words, the non-circular annular wrapping prevention body 51 is less likely to be wrapped with the contaminants a than the perfect circular annular one.

  In addition, as shown in FIG. 7A, when the foreign matter a such as grass is wound around the outer peripheral side of the annular wrapping prevention body 51, the foreign matter a that is wound into a perfect circular shape is obtained. A space portion 80 (a portion with a diagonal line rising to the right in FIG. 7) 80 is formed between the inner circumferential side of the winding prevention body 51 and the outer circumferential side of the guard plate portion 62 of the anti-winding body 51. .

  Further, as shown in FIG. 7B, the rotation speed of the rotating shaft body 13, that is, the rotation speed of the anti-winding body 51 that rotates integrally with the rotating shaft body 13 is relatively high. The true circular annular contaminant a does not tightly tighten against the anti-winding body 51, but expands in diameter based on the centrifugal force to form a true circular annular gap 81. That is, the space 80 is increased by the gap 81.

  Moreover, as shown in FIG.7 (c), the perfect circular annular | circular shaped contaminant a wound, for example, by inserting the cutting tool 82, such as a streak, into the space part 80, and cutting a part of the contaminant a, It can be easily removed from the outer peripheral side of the anti-winding body 51.

  And according to such a farm work machine 11, it is difficult for the foreign matter a to be wound around the outer peripheral side of the anti-winding body 51, so that the work can be efficiently performed continuously, and even if the foreign matter a is wound, The wound impurities a can be easily removed from the outer peripheral side of the winding preventing body 51 using the space 80.

  Further, the convex portion 52 of the winding preventing body 51 is positioned such that the distance from the virtual cylindrical surface B around the rotation center axis A gradually increases from the rotation direction front end side toward the rotation direction rear end side. Since the curved surface 55 is provided, the wrapping of the foreign matter a around the outer periphery of the wrapping prevention body 51 can be appropriately suppressed.

  Further, the anti-winding body 51 is detachably attached to the axial end portion of the rotary shaft body 13, so that the anti-winding body 51 can be replaced, and the anti-winding body 51 can be easily attached. Can be retrofitted.

  Further, the winding preventing body 51 can be easily attached to the claw attaching portion 42 of the rotating shaft 13 by using the bolt 47 and the nut 48 of the attaching means 46 for attaching the claw body 14.

  Next, FIGS. 8 to 11 show a second embodiment of the present invention.

  In the agricultural working machine 11 according to the second embodiment, the winding prevention body 51 is detachably attached to the outer peripheral surfaces of the left and right axial ends of the rotary shaft body 13 via the plurality of receiving members 85. It has been.

  That is, the receiving member 85 is fixed to the outer peripheral surface of the axial end portion of the shaft main body portion 41a of the rotating shaft portion 41 by welding or the like, and the wrapping preventing body 51 is an attachment means on the fixed receiving member 85. The mounting bolt 86 is detachably attached.

  The receiving member 85 includes a receiving plate portion 87 having a substantially U-shaped cross section, and a plurality of, for example, two nut portions 88 fixed to the receiving plate portion 87. The receiving plate portion 87 is formed with an insertion hole 89 through which the mounting bolt 86 is inserted so as to communicate with the screw hole of the nut portion 88.

  Each of the two prevention member constituting members 56 constituting the wrapping prevention body 51 is integrally provided with, for example, a curved and long guard plate portion 91 and both end portions in the longitudinal direction of the guard plate portion 91, respectively. The mounting plate portion 92 is a rectangular and flat plate. Each mounting plate portion 92 is formed with two insertion holes 93 through which the mounting bolts 86 are inserted.

  The guard plate portion 91 is configured only by a substantially semicircular arc-shaped curved plate 95 that is located radially outward from the outer peripheral surface of the axial end portion of the shaft main body portion 41a of the rotating shaft portion 41. The curved plate 95 is obtained by, for example, bending an elongated rectangular plate material into a curved shape, and by this curved plate 95, the outer peripheral surface of the axial end portion of the shaft body portion 41a of the rotating shaft portion 41 and the outer periphery of the inner boss 37 are obtained. The surface is covered.

  The curved plate 95 of the annular anti-winding body 51 is a convex located radially outward from the virtual cylindrical surface B, like the curved plate 70 of the anti-winding body 51 of the first embodiment. The portion 52 is provided on the rear side in the rotational direction, and the concave portion 53 located on the radially inner side from the virtual cylindrical surface B is provided on the front side in the rotational direction. Further, the outer surface of the convex portion 52 is a curved surface 55 whose distance from the virtual cylindrical surface B gradually increases from the front end side in the rotation direction toward the rear end side in the rotation direction. Other configurations are basically the same as those in the first embodiment.

  And also in the agricultural machine 11 concerning this 2nd Embodiment, even if the foreign material a is hard to wind around the outer peripheral side of the winding prevention body 51, and even if the foreign material a winds around, the wound foreign material a is spaced. The effects similar to those of the first embodiment can be obtained, such as being easily removable using the portion 80.

  Further, for example, as in the third embodiment shown in FIG. 12, the mounting plate portion 92 on the rear side in the rotation direction of each prevention member constituting member 56 of the anti-winding body 51 in the second embodiment has a diameter. A configuration in which a flat plate-like rising plate portion 96 protruding in an inclined manner toward the outer side in the direction may be integrally provided.

  Further, for example, as in the fourth embodiment shown in FIG. 13, the mounting plate 92 on the rear side in the rotation direction of each prevention member constituting member 56 of the anti-winding body 51 in the second embodiment has a diameter. A configuration in which a rising plate portion 97 having a curved plate shape protruding in an inclined manner toward the outer side in the direction may be integrally provided.

  Further, for example, as in the fourth embodiment shown in FIG. 14, the anti-winding body 51 in the second embodiment is configured as one prevention body having an elliptical ring shape having a convex portion 52 and a concave portion 53. You may comprise only the member 100. FIG.

  In addition, for example, an annular wrapping prevention body 51 may be configured by combining three or four or more prevention body constituent members, and the shape of the wrapping prevention body 51 is, for example, a polygonal annular shape. Etc.

  Further, for example, a configuration in which the winding preventing body 51 is fixed to the outer peripheral side of the axial end portion of the rotary shaft body 13 by welding or the like may be used.

  Furthermore, it is also possible to cut the foliage of crops such as potatoes grown on straw using the agricultural machine 11 which is a mowing machine. In this case, the foliage becomes an outer periphery of the winding preventing body 51 as a contaminant. May wrap around the side.

  Furthermore, the farm work machine 11 is not limited to a mowing work machine, and may be, for example, a rotary or a harrow that performs a tillage work.

  Further, the farm work machine 11 is not limited to a pulling type connected to the rear part of the tractor, and may be a self-propelled type provided with a traveling means.

11 Agricultural machines
13 Rotating shaft
14 nails
42 Claw mounting part
46 Mounting method
51 Winding prevention body
52 Convex
55 Curved surface
56 Preventive body components
57 Connecting member
65 Mounting plate as mounting part
66 Connecting plate as connecting part a Contaminant A Axis of rotation center B Virtual cylindrical surface

Claims (7)

A rotating shaft that rotates about a rotation center axis;
A claw attached to the rotating shaft,
An annular wrapping preventing body for preventing wrapping of impurities around the rotating shaft body;
The said winding prevention body has a convex part located in an outer side rather than the virtual cylindrical surface centering on the said rotation center axis line. The agricultural working machine characterized by the above-mentioned. The convex part of a winding prevention body has a curved surface located so that the distance from a virtual cylindrical surface may gradually increase toward the rotation direction rear end side from the rotation direction front end side. Agricultural machine. The agricultural machine according to claim 1 or 2, wherein the winding preventing body is detachably attached to the rotating shaft body. The agricultural machine according to claim 3, wherein the winding preventing body is detachably attached to the claw attaching portion of the rotating shaft body by an attaching means for attaching the claw body. The agricultural machine according to any one of claims 1 to 4, wherein the winding preventing body is attached so as to cover an outer peripheral surface of an axial end portion of the rotating shaft body. The winding preventing body has a plurality of preventing body constituting members,
The agricultural machine according to any one of claims 1 to 5, wherein the winding prevention body is formed in an annular shape by a combination of the plurality of prevention body constituting members. Anti-winding body is
A pair of prevention member constituting members each having a mounting portion formed at one end and a connecting portion formed at the other end;
A connecting member for connecting both of these preventing member constituting members,
It is attached to the claw attachment portion of the rotating shaft body in a state where the attachment portions of the two prevention member constituent members overlap each other, and the connection portions of the two prevention member constitution members are connected by the connection member. The agricultural machine according to any one of claims 1 to 6, characterized in that

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