JP2011188839A - Agricultural implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural implement able to progress work efficiency. <P>SOLUTION: The agricultural implement 1 includes a machine body 2 coupled to a tractor. The machine body 2 is provided with a plowing machine 31 set as rotatable for tilling work. The machine body 2 is provided with a covering body 36 installed as vertically rotatable centering a common shaft part 13 to cover upper part of the plowing machine 31. The machine body 2 is provided with a leveling body 41 installed as vertically rotatable centering the common shaft part 13, on the rearward of the plowing machine 31 for leveling. The agricultural implement 1 is provided with a covering body rotating means 51 vertically rotating the covering body 36 to the machine body 2 responding to the vertical rotation of the leveling body 41 to the machine body 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an agricultural machine capable of improving work efficiency.

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

  This conventional agricultural machine includes a machine body connected to the rear part of a tractor that is a traveling vehicle, a tiller body that is rotatably provided on the machine body and performs a tilling work while rotating, and a cover body that covers an upper part of the farm body And a leveling body that is rotatably connected to the rear end portion of the cover body and performs leveling work behind the tillage body.

Japanese Patent Laid-Open No. 1-128706 (FIG. 1)

  However, in the conventional agricultural machine described above, when soil adheres to the surface of the cover body facing the cultivated body, that is, the lower surface side (back side) of the cover body, it takes time and effort to drop the adhered soil. If the operation is continued with the adhesion, the agricultural machine becomes heavy and the work efficiency is lowered.

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

  The agricultural machine according to claim 1 is provided so as to be rotatable on the machine body, and can be rotated up and down with respect to the machine body. According to the cover body that covers the upper part, and can be turned up and down with respect to the machine body, the leveling body that performs the leveling work behind the tillage body, and the vertical rotation of the grounding body with respect to the machine body, Cover body rotating means for rotating the cover body up and down with respect to the machine body.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the cover body rotating means has an urging member, and uses the urging force of the urging member when the leveling body rotates upward with respect to the machine body. Then, the cover body is rotated upward with respect to the airframe, and the cover body is rotated downward with respect to the airframe against the urging force of the urging member when the leveling body is rotated downward with respect to the airframe. Is.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 1, wherein the cover body rotating means is attached to the machine body so as to be vertically rotatable, and is connected to the cover body and fixed to the leveling body. Fixedly supported by the rotating member, and can be moved up and down with respect to the machine body. The lifting member connected to the cover body and the lifting member are attached upward. An urging member that urges, and when the leveling body is integrated with the fixing member and is rotated upward with respect to the machine body, the lifting member is moved to the machine body by the urging force of the urging member. When the rotating member and the cover body rotate upward with respect to the machine body, and the leveling body integrally rotates with the fixing member and rotates downward with respect to the machine body, The elevating member resists the urging force of the urging member. As well as lowered with respect to the machine body, the rotary member and the cover member is intended to lower rotating relative to the machine body.

  According to a fourth aspect of the present invention, there is provided the agricultural machine according to the third aspect, wherein the machine body includes a spring receiving portion in which an insertion hole through which the elevating member is inserted is formed, and the elevating member is provided with a spring support at an upper end portion. And a cover body connecting portion connected to the cover body at the lower end, and the biasing member is a compression disposed between the spring receiving portion of the machine body and the spring receiving portion of the elevating member. It is constituted by a coil spring.

  The farm machine according to claim 5 is the farm machine according to any one of claims 1 to 4, wherein the machine body has a common shaft portion, and the cover body is moved up and down about the common shaft portion. The ground leveling body can be turned up and down with respect to the body so that the rear end side is raised and lowered around the common shaft portion.

  According to the first aspect of the present invention, since the cover body rotating means for rotating the cover body up and down with respect to the machine body according to the vertical rotation of the leveling body with respect to the machine body is provided, the soil attached to the cover body is dropped. Therefore, the working efficiency can be improved.

  According to the invention which concerns on Claim 2, since a cover body rotation means has a biasing member, the improvement of work efficiency can be aimed at further.

  According to the invention of claim 3, since the cover body rotating means includes the rotating member, the fixing member, the elevating member, and the urging member, the working efficiency can be further improved.

  According to the invention which concerns on Claim 4, since the urging | biasing member is comprised by the compression coil spring arrange | positioned between the spring receiving part of the body, and the spring receiving part of the raising / lowering member, The cover body can be appropriately rotated upward using the urging force.

  According to the invention which concerns on Claim 5, the simplification of a structure can be achieved compared with the structure which a cover body and a leveling body can rotate up and down centering on a respectively separate shaft part.

It is a side view of the agricultural working machine which concerns on one embodiment of this invention. It is a top view of an agricultural working machine same as the above. It is a partial top view of an agricultural working machine same as the above. It is a figure which shows the fixing member of an agricultural work machine same as the above, (a) is a figure after an assembly, (b) is a figure before an assembly. It is a side view at the time of the non-working state of an agricultural working machine same as the above. It is a side view at the time of the normal working state of an agricultural working machine same as the above. It is a side view at the time of the deep plowing work state of a farm working machine same as the above. It is operation | movement explanatory drawing of a farm work machine same as the above.

  An embodiment of the present invention will be described with reference to the drawings.

  1 and 2, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is a rotary working machine (cultivation leveling device) that is used by being connected to the rear part of a tractor that is a traveling vehicle, for example. Then, the farm work machine 1 performs the tilling work while moving forward in the traveling direction by the forward traveling of the tractor in a field such as a paddy field or a field while being connected to the rear part of the tractor.

  In addition, the tractor which is not shown in figure has the three-point link part which is the agricultural machine connection part which connects the agricultural machine 1 and raises and lowers this connected agricultural machine 1 in the rear part.

  The farm work machine 1 includes a machine body 2 connected to a three-point link part (work machine lifting device) at the rear of the tractor.

  The airframe 2 has a three-point connecting portion 5 composed of a top mast 3, a lower arm 4, and the like, and the three-point connecting portion 5 is connected to a three-point link portion of the tractor. The airframe 2 has a gear case portion 6 at the center in the left-right direction, and the input shaft 7 is rotatably supported by the gear case portion 6. The input shaft 7 is connected to the PTO shaft of the tractor via power transmission means.

  The airframe 2 has a frame pipe portion 8 that is a main frame portion that is longitudinally connected to the left and right sides of the gear case portion 6. An upper end portion of a chain case portion 9 that is a transmission case portion is attached to a left end portion that is one end portion of the frame pipe portion 8. An upper end portion of a bracket portion 10 that is a support plate portion is attached to a right end portion that is the other end portion of the frame pipe portion 8. A side plate portion 11 which is a side cover portion is fixedly attached to each of the chain case portion 9 and the bracket portion 10. That is, the front end portion of the left side plate portion 11 is fixedly attached to the rear end portion of the chain case portion 9, and the front end portion of the right side plate portion 11 is fixedly attached to the rear end portion of the bracket portion 10. . A common shaft portion (leveling body rotation fulcrum that also serves as a cover body rotation fulcrum) 13 is supported by the bearing portion 12 of each side plate portion 11.

  The airframe 2 has a hitch pipe portion 15 which is a frame portion having a longitudinal shape in the left-right direction and located in front of the frame pipe portion 8 and parallel to the frame pipe portion 8. Gauge wheel holder portions 16 are attached to both ends of the hitch pipe portion 15 in the left-right direction. A gauge wheel 17 is held by each gauge wheel holder portion 16, and the height position of the gauge wheel 17 can be adjusted with respect to the gauge wheel holder portion 16. Further, a protruding plate portion 18 protrudes forward from the gauge wheel holder portion 16, and a mounting shaft portion (rotating member rotation fulcrum) 20 in the left-right direction is supported by the protruding plate portion 18.

  As shown in FIG. 3, the airframe 2 has a spring receiving portion 21 that protrudes forward from the frame pipe portion 8. The spring receiving portion 21 is formed of, for example, a U-shaped plate having a substantially U-shaped cross section that is fixedly attached to the front side of the outer peripheral surface of the frame pipe portion 8 and opens downward. In other words, the spring receiving portion 21 has a counter plate 22 that is spaced apart from each other and a connecting plate 23 that connects the upper ends of the counter plates 22 to each other. A substantially circular insertion hole 24 is formed in the connecting plate 23 so as to penetrate the upper and lower surfaces.

  In addition, the agricultural working machine 1 is provided on the machine body 2 so as to be rotatable, and is a rotary-type tilling body 31 that performs tilling work while rotating in a predetermined rotation direction around a rotation center axis in the left-right direction by power from the input shaft 7 side. It has.

  The tilled body 31 is rotatably supported at the lower end of the chain case 9 at the left end, which is one end in the axial direction, and is rotatable at the lower end of the bracket 10 at the right end, which is the other end in the axial direction. It has a tilling shaft 32 that is a longitudinally-rotated rotation shaft that is supported, and a plurality of tilling claws 33 that project radially at a plurality of locations that are spaced apart in the axial direction of the tilling shaft 32. . The tillage shaft 32 is connected to the input shaft 7 via a power transmission means (not shown) constituted by a chain in the chain case portion 9, a transmission shaft in the frame pipe portion 8, a gear in the gear case portion 6, and the like. It is connected. When power is input to the input shaft 7, the cultivating shaft 32 of the cultivating body 31 is driven to rotate together with the cultivating claw 33 in the direction of the arrow in FIG. 1, for example, and the cultivating operation is performed by the cultivating claw 33.

  Furthermore, the farm work machine 1 includes a substantially plate-like cover body (cultivating part cover) 36 that covers the upper part of the tilling body 31 so that the soil from the tilling body 31 does not scatter upward. The cover body 36 is within a predetermined rotation angle (for example, about 10 degrees) set in advance so that the front end side moves up and down around the common shaft portion 13 located on the rear end side of the cover body 36. It can turn up and down with respect to the body 2. That is, the cover body 36 is provided in the machine body 2 so as to be vertically rotatable around a common shaft portion (rotation center axis) 13 in the left-right direction.

  The cover body 36 has a cover body plate portion 37 that is substantially plate-shaped in the left-right direction covering the upper portion of the tillage body 31. The cover main body plate portion 37 has a substantially rectangular plate shape elongated in the left-right direction in a plan view, and has a substantially curved plate shape in which the center in the front-rear direction bulges upward in a side view. Cover side plate portions 38 are fixedly attached to both ends of the cover body plate portion 37 in the left-right direction. The rear end portion of each cover side plate portion 38 is rotatably supported by the common shaft portion 13 of the body 2.

  In addition, bearing plate portions 39 are erected on both the left and right sides of the upper surface of the cover body plate portion 37, and a connection shaft portion (connection fulcrum) 40 that is a connection portion in the left-right direction is supported by each bearing plate portion 39. Yes.

  In addition, the agricultural machine 1 includes a substantially plate-shaped leveling body (flat plate) 41 that prevents soil from the tilled body 31 from splashing backward and performs leveling work behind the tilled body 31. The leveling body 41 has a predetermined rotation angle (for example, set in advance) such that the rear end side (lower end side) moves up and down around the common shaft portion 13 positioned on the front end side (upper end side) of the leveling body 41. Within the range of about 45 degrees, it can be turned up and down with respect to the body 2. That is, the leveling body 41 is provided in the machine body 2 so as to be vertically rotatable around the common shaft portion (rotation center axis) 13 in the left-right direction. Further, the front end portion of the leveling body 41 is rotatably attached to the rear end portion of the cover body 36 via a plurality of attachment means 42 such as three hinges.

  The leveling body 41 has a substantially flat plate-shaped leveling main body plate portion 43 that extends in the left-right direction and covers the rear portion of the tillage body 31, and the front end portion of the leveling main body plate portion 43 is the cover main body plate portion 37 of the cover body 36. It is attached to the rear end portion of the rear end via a mounting means 42 so as to be rotatable. Leveling side plate portions 44 are fixedly attached to both ends of the leveling main body plate portion 43 in the left-right direction. And the front-end part of each leveling side board part 44 is supported by the common shaft part 13 of the body 2 so that rotation is possible.

  Further, standing plate portions 45 are erected on both the left and right sides of the upper surface of the leveling main body plate portion 43, and a ground pressure adjusting means 46 is provided across each standing plate portion 45 and the frame pipe portion 8 of the machine body 2. Yes. The ground pressure adjusting means 46 adjusts the ground pressure for the field scene of the leveling body 41. The contact pressure adjusting means 46 is composed of, for example, an adjusting rod 47 and a coil spring 48, and the front end portion of the adjusting rod 47 is rotatably attached to a rod attaching portion 49 protruding from the frame pipe portion 8. The rear end portion is rotatably attached to the rod attachment portion 50 of the standing plate portion 45.

  Further, the agricultural working machine 1 includes a plurality of, for example, a pair of left and right cover body rotating means 51 for vertically rotating the cover body 36 with respect to the body 2 in accordance with the vertical rotation of the leveling body 41 with respect to the body 2. Yes.

  The cover body rotating means 51 holds the cover body 36 that is rotatable about the common shaft portion 13 on the rear end side in a suspended state by an urging member 52 that is an elastic means such as a spring. That is, the cover body rotating means 51 has an urging member 52 configured by, for example, a compression coil spring that is an elastic means that can be elastically deformed. The cover body 36 is rotated upward with respect to the machine body 2 by using the urging force (elastic restoring force) of the grounding body 41, and the cover body is resisted against the urging force of the urging member 52 when the leveling body 41 is rotated downward with respect to the machine body 2. 36 is rotated downward with respect to the airframe 2.

  Here, a specific configuration of the left and right cover body rotating means 51 will be described.

  As shown in FIGS. 1 and 2, etc., the cover body rotating means 51 can be rotated up and down so that the rear end side is raised and lowered around the mounting shaft part 20 on the front end side of the mounting shaft part 20 of the machine body 2. Is attached to the connecting shaft portion 40 of the cover body 36 and is pivotally connected to the connecting shaft portion 40 in the longitudinal direction, and the lower end portion is fixed to the standing plate portion 45 of the leveling body 41. And an upper end fixing member (downward urging arm) 54 whose upper end is mounted and supported by a rotating member 53.

  Further, the cover body rotating means 51 is fitted and inserted into the insertion hole 24 of the spring receiving portion 21 of the machine body 2 and can be moved up and down with respect to the machine body 2 and can be rotated to the connecting shaft section 40 of the cover body 36. And a vertically elevating member (rod) 55 that is connected in the vertical direction, and an urging member 52 that urges the elevating member 55 upward.

  When the leveling body 41 is integrally rotated with the fixing member 54 and rotated upward with respect to the machine body 2, the elevating member 55 is raised with respect to the machine body 2 by the urging force of the urging member 52. When the member 53 and the cover body 36 are rotated upward with respect to the machine body 2 and the leveling body 41 is integrally rotated with the fixing member 54 and is rotated downward with respect to the machine body 2, the elevating member 55 is biased. The member 52 is lowered against the body 2 against the urging force of the member 52, and the turning member 53 and the cover body 36 are turned downward with respect to the body 2.

  The rotating member 53 is formed of, for example, a single plate having a longitudinal shape that is bent at an obtuse angle at one position in the middle of the longitudinal direction and has a substantially U shape in a side view. The front end portion of the rotation member 53 is rotatably attached to the attachment shaft portion 20 of the body 2. A bent portion that is an intermediate portion in the front-rear direction of the rotating member 53 is rotatably connected to the connecting shaft portion 40 of the cover body 36. Further, the upper end portion of the fixing member 54 is placed on the upper surface of the rear end portion of the rotating member 53. That is, the upper end portion of the fixing member 54 is placed and supported on the upper surface of the rear end portion of the rotating member 53.

  For example, as shown in FIGS. 4A and 4B, the fixing member 54 has a long first plate 56 in which a mounting hole 59 is formed, and a slightly long shape shorter than the first plate 56. The second plate 57 and a substantially elliptical contact plate 58 sandwiched and fixed by the first plate 56 and the second plate 57 are configured. The lower end portion of the contact plate 58 is a substantially arcuate contact portion 60 that protrudes downward and contacts the upper surface of the rear end portion of the rotation member 53. That is, as shown in FIG. 1, a part of the rotation member 53 is inserted into the gap between the first plate 56 and the second plate 57 from below, and the contact portion 60 of the fixing member 54 is connected to the rotation member 53. It is placed and supported on the upper surface of the rear end.

  The elevating member 55 has a rod-like portion 61 which is a main body portion having a longitudinally long and substantially circular cross section that is fitted and inserted into the insertion hole 24 of the spring receiving portion 21 of the machine body 2 so as to be able to move up and down. A substantially cylindrical cover body connecting portion 62 in the left-right direction is fixedly attached to the lower end portion of the rod-like portion 61, and this cover body connecting portion 62 is rotatably connected to the connecting shaft portion 40 of the cover body 36. Yes. A thread groove 63 is formed on the outer periphery on the upper end side of the rod-shaped part 61, and a plurality (two) of nuts 64 are screwed into the thread groove 63, and the spring receiving part 65 is formed by the plurality of nuts (double nuts) 64. It is configured. Thus, the elevating member 55 has the spring receiving portion 65 at the upper end portion and the cover body connecting portion 62 connected to the connecting shaft portion 40 of the cover body 36 at the lower end portion.

  The urging member 52 is constituted by, for example, a substantially cylindrical compression coil spring disposed in a compressed state between the spring receiving portion 21 of the machine body 2 and the spring receiving portion 65 of the elevating member 55. That is, the substantially cylindrical urging member 52 is disposed on the outer peripheral side of the rod-like portion 61 of the elevating member 55, and its lower end abuts against the spring receiving portion (lower spring receiving portion) 21 of the machine body 2 and The upper end portion is in contact with a spring receiving portion (upper spring receiving portion) 65 of the elevating member 55 (see FIG. 1).

  The urging force of the urging member 52 can be adjusted by changing the fixing position of the nut 64 with respect to the rod-shaped portion 61.

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

  The side view at the time of the non-working state (at the time of lifting) of the agricultural working machine 1 is shown by FIG.

  As shown in FIG. 5, when the farm equipment 1 as a whole is lifted up to a predetermined non-working position by the three-point link portion of the tractor and leaves the farm scene, the leveling body 41 moves the common shaft portion 13 by its own weight. As a center, it pivots downward with respect to the airframe 2 and assumes a substantially vertical posture.

  At this time, a downward force based on the weight or the like of the leveling body 41 acts on the upper surface of the rear end portion of the rotating member 53 from the contact portion 60 of the fixing member 54.

  Then, the biasing member 52 is compressed and elastically deformed by an amount corresponding to the magnitude of the downward force acting on the rotating member 53, and the lifting member 55 is moved to the spring of the body 2 based on the compression elastic deformation of the biasing member 52. While descending with respect to the receiving portion 21, the rotating member 53 rotates downward with respect to the body 2 around the mounting shaft portion 20.

  As a result, the cover body 36 is pushed downward by the turning member 53 against the urging force of the urging member 52, and rotated downward about the common shaft portion 13 with respect to the machine body 2. Moves closer to the body 31. As a result, the cover body 36 is inclined forward and the distance between the front lower surface of the cover main body plate portion 37 of the cover body 36 and the tip portion movement position of the tillage claw 33 of the tillage body 31 is reduced. That is, the tip of the rotating tillage claw 33 passes through the lower surface proximity position of the cover main body plate portion 37 of the cover body 36.

  For this reason, as shown in FIG. 8, at the time of tillage work, the side of the cover body plate 37 of the cover body 36 facing the tillage body 31, that is, the lower surface side (back side) of the cover body plate 37 of the cover body 36. Even when soil such as mud in the field adheres to the soil and grows, the adhered soil (attached soil) is scraped off by the tip of the tillage claw 33 of the rotating tillage body 31.

  That is, for example, at the corner of the farm field, when the entire farm work machine 1 is lifted to the non-working position by the three-point link part of the tractor and the tractor is turned (when the tractor is turned), the cover body is covered with the weight of the leveling body 41. Since 36 rotates downward about the common shaft portion 13 and approaches the cultivating body 31, the attached soil of the cover body 36 is scraped off by the cultivating body 31.

  Further, for example, in the middle of tillage work, the cover body 36 is centered on the common shaft portion 13 in response to the leveling body 41 following the unevenness of the farm scene and rotating up and down around the common shaft portion 13. Because of the vertical rotation (vertical vibration), the adhered soil of the cover body 36 is scraped off by the tillage body 31 or is shaken off by the vertical rotation of the cover body 36 itself.

  5 is a state where the cover body 36 is closest to the tillage body 31, that is, a state where the cover body 36 is rotated downward to the lower limit position. Stopper means (not shown) such as a stopper collar is attached to the outer periphery of the rod-like portion 61 of the elevating member 55, and the lowering of the elevating member 55 is restricted by contact with the spring receiving portion 21 of this stopper means, The body 36 stops at the lower limit position. For this reason, the cover body 36 is prevented from rotating downward beyond the lower limit position, and the cover body 36 does not come into contact with the tip of the tillage claw 33 of the tillage body 31. Further, the state of FIG. 5 is a state in which the leveling body 41 is rotated downward to the lower limit position.

  FIG. 6 shows a side view of the agricultural work machine 1 in the normal work state (normal depth work).

  As shown in FIG. 6, when the whole farm work machine 1 is lowered to a predetermined work position (normal work position) at the three-point link portion of the tractor, the leveling body 41 comes into contact with the farm scene and starts from the farm scene. With the received force, it turns upward with respect to the airframe 2 around the common shaft portion 13 and assumes a forward tilted posture.

  At this time, the urging member 52 is extended by a predetermined amount based on the elastic restoring force. Based on the extension of the urging member 52, the elevating member 55 is raised with respect to the spring receiving portion 21 of the machine body 2 and the rotating member 53 However, it pivots upward with respect to the airframe 2 until the upper surface of the intermediate portion (contact portion 71) contacts the lower end portion (contact contact portion 72) of the frame pipe portion 8 with the mounting shaft portion 20 as the center.

  As a result, the cover body 36 is rotated upward about the common shaft portion 13 with respect to the machine body 2 in the form of being lifted upward by the rotating member 53 based on the urging force (elastic restoring force) of the urging member 52. It moves away from the cultivating body 31. As a result, the cover body 36 is in a substantially horizontal posture, and the distance between the front lower surface of the cover main body plate portion 37 of the cover body 36 and the tip portion moving position of the tillage claw 33 of the tillage body 31 is increased. That is, the tip of the rotating tillage claw 33 passes through a position away from the lower surface of the cover body plate portion 37 of the cover body 36 by an optimum distance for the tilling work.

  Then, an appropriate tilling work is performed on the tilled body 31, and an appropriate leveling work is performed behind the tilled body 31 by the leveling body 41.

  The state shown in FIG. 6 is a state where the cover body 36 is farthest from the tilling body 31, that is, a state where the cover body 36 is rotated upward to the upper limit position.

  The side view at the time of the deep plowing work state (at the time of deep plowing work) of the agricultural working machine 1 is shown by FIG.

  As shown in FIG. 7, when the farm work machine 1 as a whole is lowered to a predetermined work position (deep plowing work position) below FIG. 6 at the three-point link portion of the tractor, the leveling body 41 is removed from the farm scene. With the force received, it rotates further upward with respect to the airframe 2 around the common shaft portion 13 and assumes a substantially horizontal posture.

  At this time, the urging member 52, the rotating member 53, and the elevating member 55 do not move relative to the machine body 2, and only the leveling body 41 and the fixing member 54 are centered on the common shaft portion 13 with respect to the machine body 2. By rotating upward, the contact portion 60 of the fixing member 54 is separated from the upper surface of the rear end portion of the rotating member 53.

  For this reason, the distance between the cover body 36 and the cultivating body 31 does not change, and as in the case of FIG. 6, an appropriate cultivating work is performed on the cultivating body 31. Appropriate leveling work is performed. 7 is a state in which the leveling body 41 is rotated upward to the upper limit position.

  And according to such a farming machine 1, since it is provided with the cover body rotation means 51 which rotates the cover body 36 up and down with respect to the body 2 according to the vertical rotation with respect to the body 2 of the leveling body 41, for example, tillage The soil adhering to the lower surface side of the cover body 36 can be dropped by contact of the body 31 with the tilling claw 33, vertical vibration of the cover body 36, or the like. Therefore, it is not necessary for the operator to manually remove the cover soil of the cover body 36 and to remove the weight of the agricultural machine 1 by the amount of the soil attached to the cover body 36. Further, the wear of the tilling claws 33 is reduced, and therefore the working efficiency of the tilling work can be improved.

  Further, since the cover body rotating means 51 includes the biasing member 52, the rotating member 53, the fixing member 54, and the elevating member 55, the leveling body 41 can be rotated up and down by the cover body rotating means 51 having a simple configuration. Accordingly, the cover body 36 can be appropriately rotated up and down, and the working efficiency can be further improved.

  Furthermore, since both the cover body 36 and the leveling body 41 can be rotated up and down around the same common shaft portion 13, the cover body 36 and the leveling body 41 can be rotated up and down around separate shaft portions, respectively. Compared to a simple configuration, the number of parts is small, and the configuration can be simplified.

  Note that the cover body rotating means 51 of the farm work machine 1 may have, for example, a configuration in which the rotating member is not biased, and the rotating member is directly biased upward by the biasing member.

  Further, the farm work machine 1 may have a configuration in which a plate member such as a rubber plate or a stainless plate to which dirt is difficult to adhere is attached to the lower surface of the cover body 36, for example.

  Furthermore, the agricultural working machine 1 has an elastic plate such as a rubber plate that can be elastically deformed attached to the lower surface of the cover body 36, for example, and when the cover body 36 is rotated downward to the lower limit position, The structure etc. which contact an elastic board intermittently may be sufficient.

1 Agricultural machine 2 Airframe
13 Common shaft
21 Spring receiver
24 insertion hole
31 Tillage
36 Cover body
41 Leveling body
51 Cover body rotation means
52 Biasing member
53 Rotating member
54 Fixing member
55 Lifting member
62 Cover body connection
65 Spring receiver

Claims (5)

The aircraft,
A plowing body that is rotatably provided in this machine body and performs a plowing work while rotating,
It is possible to turn up and down with respect to the machine body, and a cover body that covers the upper part of the tillage body,
It is possible to rotate up and down with respect to the machine body, and a leveling body that performs leveling work behind the tillage body,
A farm working machine comprising: cover body rotating means for rotating the cover body up and down relative to the machine body according to the vertical rotation of the leveling body with respect to the machine body. The cover body rotating means has an urging member, and when the leveling body is rotated upward with respect to the machine body, the cover body is rotated upward with respect to the machine body by using the urging force of the urging member, and The agricultural working machine according to claim 1, wherein the cover body is rotated downward with respect to the machine body against the urging force of the urging member when the machine body is rotated downward with respect to the machine body. The cover body rotating means is
A rotating member attached to the machine body so as to be rotatable up and down and connected to the cover body;
A fixed member fixedly attached to the leveling body and supported by the rotating member;
It is possible to move up and down with respect to the machine body, and a lifting member connected to the cover body,
A biasing member that biases the lifting member upward,
When the leveling body is integrally rotated with the fixing member and rotated upward with respect to the machine body, the elevating member is raised with respect to the machine body by the urging force of the urging member, and the rotating member And the cover body pivots upward relative to the airframe,
When the leveling body is integrated with the fixing member and rotated downward with respect to the aircraft, the elevating member descends against the aircraft against the urging force of the urging member, and the The agricultural working machine according to claim 1, wherein the rotating member and the cover body rotate downward with respect to the machine body. The airframe has a spring receiving portion in which an insertion hole into which the elevating member is inserted is formed,
The elevating member has a spring receiving portion at the upper end portion and a cover body connecting portion connected to the cover body at the lower end portion,
The agricultural working machine according to claim 3, wherein the urging member is constituted by a compression coil spring disposed between a spring receiving portion of the machine body and a spring receiving portion of the elevating member. The fuselage has a common shaft,
The cover body is rotatable up and down with respect to the machine body so that the front end side moves up and down around the common shaft part.
The agricultural leveling machine according to any one of claims 1 to 4, wherein the leveling body is rotatable up and down with respect to the machine body so that a rear end side thereof moves up and down around the common shaft part.

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