JP5787442B2 - Rotary work machine - Google Patents

Description

  The present invention relates to a rotary working machine capable of performing earthing work.

  Conventionally, for example, a rotary working machine described in Patent Document 1 is known.

  This conventional rotary working machine has a machine body connected to the rear part of a traveling vehicle such as a tractor, a tiller body that is rotatably provided on this machine body and performs a tilling work while rotating, and can be rotated up and down with respect to the machine body. A leveling body that is provided and performs leveling work behind the tillage body.

JP-A-8-116703 (FIG. 4)

  By the way, for example, there is a case where the earthing work for drawing and moving the soil to the corner of the field or the concave part of the field is necessary, but the conventional rotary working machine cannot perform the earthing work.

  This invention is made | formed in view of such a point, and it aims at providing the rotary working machine which can perform earthing work.

請 Motomeko 1 rotary working machine according includes a body coupled to the vehicle, rotatably provided in this body, tilling member and the pivot center axis in the horizontal direction on the machine body to the tilling operation while rotating And a leveling body that performs leveling work behind the cultivated body, and restricts upward rotation of the leveling body about the rotation center axis with respect to the machine body. Rotation regulating means for positioning the leveling body at the earthing work position, and the rotation regulating means regulates the downward rotation of the leveling body about the rotation center axis with respect to the machine body. a rotary working machine also serves as a deformation preventing means for preventing the deformation of the ground leveling body, the machine body includes a side plate portion, said rotation restricting means includes a engaging body provided on the ground leveling member, the Provided on the side plate, engaged and engaged A rotation restricting body that can be selectively switched to a removal state, and when the rotation restricting body is in an engaged state, the leveling body is turned upward by the engagement of the engagement body and the rotation restricting body. The leveling body is regulated and positioned at the earthing work position, and when the rotation regulating body is in the disengaged state, the downward rotation of the leveling body is regulated by the engagement between the engaging body and the side plate portion. Is.

The rotary working machine according to claim 2 is the rotary working machine according to claim 1 , wherein the engaging body has an engaging pin, and the rotation restricting body is releasably engaged with the engaging pin. And is provided on the side plate of the machine body so as to be rotatable in the vertical direction.

Rotary working machine according to claim 3, in claim 1 or 2 rotary working machine described in the rotation regulating means, soil pulling working position the leveling member to regulate the upward pivoting and lower rotation of the leveling member It is positioned as a locked state.

The rotary working machine according to claim 4 is provided with a machine body connected to the traveling vehicle, a tiller body rotatably provided on the machine body and capable of performing a tilling work while rotating, and a rotatable body in the vertical direction. A leveling body that performs leveling work behind the tillage body, and a rotation regulating means that regulates the upward rotation of the leveling body and positions the leveling body at the earthing work position. A pin attachment body having a first attachment hole portion and a second attachment hole portion; and the first attachment hole portion and the second attachment hole. A detachable pin that is selectively attached to the portion, and when the detachable pin is attached to the first attachment hole portion, the upward rotation of the leveling body is restricted by the engagement of the detachable pin and the side plate portion. This leveling body is positioned at the earthing work position. The desorption pin when being attached to the second mounting hole portion, the lower pivot of the ground leveling member by engagement with the releasable pin and the side plate portion is intended to be regulated.

The rotary working machine according to claim 5 is provided with a machine body connected to the traveling vehicle, a tiller body rotatably provided on the machine body and capable of performing a tilling work while rotating, and a rotatable body in the vertical direction. A leveling body that performs leveling work behind the tillage body, and a rotation regulating means that regulates the upward rotation of the leveling body and positions the leveling body at the earthing work position. A pin attachment body having a side plate portion, wherein the rotation restricting means is provided on the leveling body, and has a downward rotation restricting portion, a first attachment hole portion, and a second attachment hole portion; and the first attachment hole portion. And an attachment / detachment pin selectively attached to the second attachment hole, and when the attachment / detachment pin is attached to the first attachment hole, the leveling body is engaged by engagement of the attachment / detachment pin and the side plate. This leveling body is soiled by the upward rotation of the When the detachable pin is mounted in the second mounting hole, the downward rotation of the leveling body is restricted by the engagement of the downward rotation restricting portion and the side plate portion. is there.

  According to the present invention, since the rotation regulating means for regulating the upward rotation of the leveling body and positioning the leveling body at the earthing work position is provided, the earthing is performed by the leveling body positioned at the earthing work position. Work can be done.

It is a side view of the rotary working machine which concerns on the 1st Embodiment of this invention. It is a partial rear view of a rotary working machine same as the above. It is a rear view of the rotation control means of a rotary working machine same as the above. It is a partial side view (leveling body lock state) of a rotary working machine same as the above. It is a partial side view (leveling body free state) of a rotary work machine same as the above. (A) And (b) is a figure which shows the engaging body of a rotary working machine same as the above. (A) And (b) is a figure which shows the rotation control body of a rotary working machine same as the above. It is a partial side view of the rotary working machine which concerns on the 2nd Embodiment of this invention. It is a partial side view (leveling body lock state) of a rotary working machine same as the above. It is a partial side view (leveling body free state) of a rotary work machine same as the above. It is a figure which shows the pin attachment body of a rotary working machine same as the above. It is a figure which shows a pin attachment body and attachment / detachment pin same as the above. It is a partial side view of the rotary working machine which concerns on the 3rd Embodiment of this invention. It is a partial side view (leveling body lock state) of a rotary working machine same as the above. It is a partial side view (leveling body free state) of a rotary work machine same as the above. It is a figure which shows the pin attachment body of a rotary working machine same as the above. It is a figure which shows a pin attachment body and attachment / detachment pin same as the above.

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

  1 to 3, reference numeral 1 denotes a rotary working machine. The rotary working machine 1 is an agricultural working machine that is used by being connected to a rear portion of a tractor (not shown) that is a traveling vehicle, for example.

  Then, the rotary working machine 1 performs the tilling work while moving forward (traveling direction) by the forward traveling of the tractor while being connected to the rear portion of the tractor. Moreover, this rotary work machine 1 can perform soil pulling work, for example, when moving soil in a farm scene toward a corner of a farm field or a recess in a farm field, in addition to a normal tilling work. Is.

  The rotary work machine 1 includes a machine body 2 that is detachably connected to a three-point link part (work machine lifting device) at the rear of a tractor (not shown), and is rotatably provided to the machine body 2 while rotating with power from the tractor side. A cultivating body 3 for performing a cultivating work is provided. Further, the rotary working machine 1 is provided at the rear end portion of the tiller body cover 6 of the body 2 so as to be pivotable in the vertical direction about the pivot center axis (rotation fulcrum) X in the left-right direction. A plate-shaped leveling body (level plate) 4 that performs leveling work behind, and a predetermined soil on which the leveling body 4 can perform earthing work by regulating upward rotation of the leveling body 4. Rotation restricting means 5 for positioning at the pulling work position is provided.

  The machine body 2 has a frame pipe portion 11 that is a longitudinally-shaped and cylindrical frame portion. A gear box portion 12 is provided at a central portion in the left-right direction of the frame pipe portion 11, and an input shaft 13 projects forward from the gear box portion 12. The input shaft 13 is connected to a PTO shaft (not shown) at the rear of the tractor via a transmission means (not shown) constituted by a universal joint, a transmission shaft, and the like.

  An upper portion of a chain case portion (side transmission case portion) 16 that is a vertically extending and box-shaped tilling body support portion is attached to the left end portion that is one longitudinal end portion of the frame pipe portion 11. An upper portion of a bracket portion (side frame portion) 17 which is a vertically extending and plate-shaped tilling body support portion is attached to the right end portion which is the other longitudinal end portion of the frame pipe portion 11. The tiller 3 is rotatably mounted on the chain case portion 16 and the bracket portion 17 that are opposed to each other. In other words, the pair of left and right tillage body support portions 16 and 17 that face each other with a predetermined distance away from each other support the tiller body 3 that is horizontally elongated in a rotatable manner. A side plate portion 20 that is a plate-like side cover portion that covers the side portions of the tillage body 3 is fixedly provided at the rear end portions of the tillage body support portions 16 and 17. Each side plate portion 20 protrudes rearward from the rear end portion of the corresponding tillage body support portion 16, 17.

  In addition, a left and right round shaft-shaped pin 19 in a released state is fixed to the upper portion of each side plate portion 20, and this pin 19 projects outward from the outer surface of the side plate portion 20. In other words, the pin 19 protrudes leftward from the outer surface of the left side plate 20 fixed to the chain case 16, and the pin 19 extends rightward from the outer surface of the right side 20 fixed to the bracket 17. Protrudes toward.

  Further, the machine body 2 has a tillage body cover portion 6 that is fixed to the frame pipe portion 11 and covers an upper portion of the tillage body 3. The cultivating body cover portion 6 has a cover body plate 7 that is a curved plate that is convex upward and is longitudinal in the left-right direction, and cover side plates 8 that are fixed to both ends of the cover body plate 7 in the left-right direction. ing.

  Then, at the rear end of the cover body plate 7 of the tiller body cover portion 6, the upper end portion (front end portion) of the leveling body 4 is centered about the left / right axis (rotation center axis X) 10 via the hinge 9. It is pivotally attached. The left cover side plate 8 is attached to the upper inner surface of the chain case portion 16 so as to overlap each other, and the right cover side plate 8 is attached to the upper inner surface of the bracket portion 17 so as to overlap each other (see FIG. 3).

  The tillage body 3 has a rotation shaft 21 that is a left and right longitudinal tillage shaft that is rotatably supported by a lower portion of the left chain case portion 16 and a lower portion of the right bracket portion 17. The left end which is one axial end of the rotating shaft 21 is rotatably supported by a lower part of the chain case portion 16 via a bearing (not shown), and the right end which is the other axial end of the rotating shaft 21 is The lower part of the bracket part 17 is rotatably supported via a bearing (not shown). The rotation shaft 21 receives power from the power transmission means connected to the input shaft 13, and rotates in a predetermined direction around the rotation center axis in the left-right direction. Further, a plurality of tilling claws 22 for performing a tilling operation while rotating integrally with the rotating shaft 21 are detachably attached to the rotating shaft 21. Each tilling claw 22 is formed in a plate shape bent into a desired shape.

  The leveling body 4 includes a leveling main body plate 26 having a substantially rectangular plate shape in the left-right direction, which performs leveling work while rotating up and down with respect to the machine body 2 so as to follow the field scene behind the cultivating body 3, and the leveling body. The main body plate 26 has a leveling side plate 27 fixed to both ends in the left-right direction. An upper end portion of the leveling main body plate 26 is rotatably attached to a rear end portion of the cover main body plate 7 of the tillage body cover portion 6 of the machine body 2 via a hinge 9. Note that the lower end portion of the leveling main body plate 26 is a free end portion 28.

  The rotation restricting means 5 also functions as a deformation preventing means for restricting the downward movement of the leveling body 4 relative to the machine body 2 during back travel of the tractor and preventing the leveling body 4 from being deformed. The rotation restricting means 5 is provided on each of the left and right sides of the rotary working machine 1.

  The rotation restricting means 5 is, for example, of a connecting arm specification, and is fixedly provided on the leveling body 4 and is rotated integrally with the leveling body 4 as shown in FIGS. 4 to 7. The engaging body 31 and the side plate portion 20 are provided so as to be pivotable in the vertical direction about the horizontal axis 33, and are selected to be in an engaged state (actuated state) and an engaged disengaged state (non-actuated state). And a plate-like rotation restricting body (connecting arm) 32 that can be switched automatically.

  The rotation restricting body 32 is disengaged from the engagement state where the engagement body 31 is engaged with the engagement pin 30 and the engagement body 30 is engaged with the engagement pin 30 by, for example, rotation based on the human power of the operator. Then, it is selectively switched to the disengaged state engaged with the pin 19 on the side plate portion 20 side.

  Here, the engaging body 31 includes a substantially triangular mounting plate 36 and an engaging pin 30 which is a left and right round shaft-shaped lock pin attached to the rear portion of the mounting plate 36.

  The mounting plate 36 is attached to the inner surface of the leveling side plate 27 of the leveling body 4 with a mounting tool (for example, a bolt and a nut) 37 so as to overlap the leveling side plate 27. A plurality (for example, four) bolt holes 38 are formed in the mounting plate 36.

  The engagement pin 30 protrudes outward from the outer surface of the mounting plate 36 and faces the rear end surface of the side plate portion 20. That is, the front end side engaging portion 30a of the engaging pin 30 is located outward from the outer surface of the side plate portion 20 (see FIG. 3). The engagement pin 30 is attached to a pin hole 39 formed in the attachment plate 36 by fitting. The outer diameter of the engagement pin 30 and the outer diameter of the pin 19 are the same. However, for example, the outer diameter of the pin 19 may be smaller than the outer diameter of the engagement pin 30.

  On the other hand, the rotation regulating body 32 is a lock body that regulates the vertical leveling of the leveling body 4 relative to the body 2 and locks (fixes) the leveling body 4 to the body 2. The rotation restricting body 32 is composed of, for example, an elongated rectangular single plate member only.

  A base end portion which is one end portion in the longitudinal direction of the rotation restricting body 32 is attached to the outer surface side of the side plate portion 20 so as to be rotatable about the shaft 33. A distal end portion which is the other end portion in the longitudinal direction of the rotation restricting body 32 is a free end portion, and the free end portion side is slightly bent outward. Then, the free end portion side of the rotation restricting body 32 is a knob portion 41 that an operator picks with a fingertip when the rotation restricting body 32 is rotated with respect to the side plate portion 20.

  A coil spring 42, which is an urging body that urges the rotation restricting body 32 toward the side plate portion 20 side, is disposed on the outer peripheral side of the shaft 33 that is a rotation fulcrum with respect to the side plate portion 20 of the rotation restricting body 32. Has been. The coil spring 42 is positioned between the washers 43 that are spaced apart from each other.

  A shaft hole 44 is formed at the base end of the rotation restricting body 32, and a left and right round shaft 33 is inserted into the shaft hole 44. Engage with the distal end side of the rotation restricting body 32 by releasable engagement with the distal end side engaging portion 30a of the engaging pin 30 of the engaging body 31 when the rotation restricting body 32 is engaged. An engaging hole 45 is formed. When the rotation restricting body 32 is in the disengaged state, the engagement hole portion 45 engages with the pin 19 attached to the side plate portion 20 so as to be releasable (detachable) by fitting.

  Then, as shown in FIG. 7, for example, it is possible to cope with the positional deviation of the pins 19 and 30 due to assembly / manufacturing errors, member deformation, etc., and the operator picks the knob 41 to turn the rotation restricting body 32 to the coil spring 42. The shaft hole 44 is provided in the longitudinal direction of the rotation restricting body 32 so that the engagement between the engagement hole 45 and the pins 19 and 30 can be released by moving in the direction away from the side plate 20 against the urging force. It is formed in the shape of a long hole along. Further, the engagement hole 45 is formed in a round hole shape that engages and engages with the pins 19 and 30 in a detachable manner. For example, although not shown, both the shaft hole 44 and the engagement hole 45 may be formed in a long hole shape along the longitudinal direction of the rotation restricting body 32.

  As shown in FIG. 1, the rotary working machine 1 has a ground pressure adjusting means 47 for adjusting the ground pressure with respect to the field scene of the leveling body 4 during the tilling work, and a gauge wheel supported at the front of the body 2. A gauge ring 49 is provided through a means 48 so that the vertical position can be adjusted.

  Next, the operation of the rotary working machine 1 will be described.

  When the rotary work machine 1 is used to pull and move the soil of the farm scene toward, for example, the corners of the farm field or the concave parts of the farm field, the operator, as shown in FIG. And the engagement hole 45 of the rotation restricting body 32 and the engagement pin 30 are engaged with each other by fitting.

  As a result, when the rotation restricting body 32 is engaged, the leveling body 4 is rotated upward with respect to the machine body 2 by the engagement between the engagement pin 30 of the engaging body 31 and the engagement hole 45 of the rotation restricting body 32. Both the movement and the downward rotation are restricted, and the leveling body 4 is positioned as a locked state in a substantially vertical posture at the earthing work position with respect to the machine body 2.

  Then, when the entire rotary work machine 1 moves forward by the forward traveling of the tractor, the ground leveling body 4 in the locked state positioned at the earthing work position performs the earthing work while maintaining the substantially vertical posture.

  Further, when performing normal tillage work using the rotary working machine 1, the operator turns the rotation restricting body 32 to release the engagement from the engaged state as shown in FIG. The state is switched, and the engagement hole 45 of the rotation restricting body 32 and the pin 19 are engaged with each other by fitting.

  As a result, when the rotation restricting body 32 is in the disengaged state, the leveling body 4 is in a free state in which the leveling body 4 can rotate in the vertical direction within a predetermined range with respect to the machine body 2 and can perform the tilling work. is there. For example, as is clear from FIG. 5, the leveling body 4 in the free state can freely rotate upward to a position above the earthing work position.

  When the rotation restricting body 32 is in the disengaged state, for example, when the tractor travels back and a forward external force (force received from the soil) acts on the leveling body 4, the engaging pin 30 of the engaging body 31 Only the downward rotation of the leveling body 4 is restricted by contact engagement with the engagement receiving surface (engagement receiving portion) 50 of the rear end surface of the side plate portion 20. As a result, the leveling body 4 does not rotate downward from the predetermined lower limit position, and deformation of the leveling body 4 is suppressed.

  And according to such a rotary working machine 1, since it has the rotation control means 5 which regulates the upward rotation of the leveling body 4 and positions this leveling body 4 in the earthing work position, this earthing work position It is possible to perform earthing work with the leveling body 4 positioned at the position.

  Further, when the rotation restricting body 32 is in the engaged state, the upper and lower rotations of the leveling body 4 are restricted by the engagement between the engagement pin 30 of the engaging body 31 and the rotation restricting body 32, and the leveling body 4. Is positioned as a locked state (fixed state with respect to the airframe 2) at the earthing work position, so that the earthing work can be performed stably and appropriately with the leveling body positioned at the earthing work position, Since the downward rotation of the leveling body 4 is restricted by the engagement of the engagement pin 30 of the engagement body 31 and the engagement receiving surface 50 of the side plate portion 20 when the rotation restriction body 32 is in the disengaged state, the back of the tractor Deformation of the leveling body 4 during traveling can be prevented.

  Furthermore, since the rotation restricting means 5 also functions as a deformation preventing means that restricts the downward rotation of the leveling body 4 and prevents the leveling body 4 from being deformed, the configuration can be simplified.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  In the rotary working machine 1 according to the second embodiment, the rotation restricting means 5 has a pin specification different from the connection arm specification, and does not have the engaging body 31 and the rotation restricting body 32, and has a pin attachment. The body 61 and the pin mounting body 61 have one round shaft-like attachment / detachment pin 62 that can be attached / detached manually by the operator.

  That is, the rotation restricting means 5 is fixed to the leveling body 4 and has a pin mounting body 61 having a first mounting hole 63 and a second mounting hole 64, and a first mounting hole 63 and a second mounting hole. And a detachable pin 62 that is selectively attached to the portion 64.

  The pin mounting body 61 is configured by a substantially triangular mounting plate 66 and a rectangular pin mounting plate 68 that is connected to the rear portion of the mounting plate 66 via a connecting plate 67 and is spaced apart from a part of the mounting plate 66. Has been. The side plate portion 20 enters between the mounting plate 66 and the pin mounting plate 68.

  The mounting plate 66 is attached to the inner surface of the leveling side plate 27 of the leveling body 4 with mounting tools (for example, bolts and nuts) 37 so as to overlap the leveling side plate 27. A plurality (for example, four) bolt holes 70 are formed in the mounting plate 66. The mounting plate 66 is formed with one first hole 71 and one second hole 72 (see FIG. 12).

  The pin mounting plate 68 is formed with a first hole 73 and a second hole 74 that are spaced apart from the first hole 71 and the second hole 72 of the mounting plate 66, respectively (see FIG. 12). ). The first hole 71 of the mounting plate 66 and the first hole 73 of the pin mounting plate 68 constitute a first mounting hole (locking pin hole) 63, and the second hole 72 of the mounting plate 66. And the second hole 74 of the pin mounting plate 68 constitute a second mounting hole (free pin hole) 64.

  A concave portion 76 is formed at the rear end portion of each side plate portion 20 of the machine body 2. The concave portion 76 has one engagement receiving surface (engagement receiving portion) 77 for restricting upward rotation and two engagement receiving surfaces (engagement receiving portions) 78 and 79 for restricting downward rotation. doing. That is, the engagement receiving surfaces 77, 78, and 79 that abut and engage with the attachment / detachment pin 62 are formed in the concave portion 76 on the rear end surface of the side plate portion 20. The rest of the configuration of the second embodiment is basically the same as the configuration of the first embodiment.

  When the rotary work machine 1 according to the second embodiment is used to pull and move the soil of the farm scene, for example, toward the corner of the farm field or the recess of the farm field, the operator As shown in FIGS. 8 and 9, the attachment / detachment pin 62 is attached to the first attachment hole 63 of the pin attachment body 61 by fitting.

  As a result, when the detachable pin 62 is mounted in the first mounting hole 63, the leveling body 4 is brought into contact by the contact engagement between the detachable pin 62 and the engagement receiving surface 77 for restricting the upward rotation of the side plate portion 20. Only the upward rotation is restricted, and the leveling body 4 is positioned in a substantially vertical posture at the earthing work position.

  When the rotary work machine 1 as a whole moves forward by the forward travel of the tractor, the leveling body 4 positioned at the earthing work position by the restriction of the upward rotation performs the earthing work while maintaining a substantially vertical posture. As indicated by a two-dot chain line in FIG. 9, only the downward rotation of the leveling body 4 is restricted by the contact engagement between the attachment / detachment pin 62 and the engagement receiving surface 78 for restricting the downward rotation of the side plate portion 20. Is done.

  Further, when performing normal tillage work using the rotary working machine 1, the operator attaches the detaching pin 62 to the second mounting hole 64 of the pin mounting body 61 as shown in FIG. Install by fitting.

  As a result, when the detachable pin 62 is mounted in the second mounting hole 64, the leveling body 4 is in a free state in which the leveling body 4 can be rotated in the vertical direction within a predetermined range with respect to the machine body 2, and the tillage leveling work can be performed. Is possible. For example, as is clear from FIG. 10, the ground leveling body 4 in the free state can freely rotate upward to a position above the earthing work position because the attachment / detachment pin 62 and the engagement receiving surface 77 do not engage with each other. Can do.

  When the detachable pin 62 is attached to the second attachment hole 64, for example, when the tractor travels back and a forward external force (force received from the soil) acts on the leveling body 4, the detachable pin 62 and Only the downward rotation of the leveling body 4 is restricted by contact engagement with the engagement receiving surface 79 for restricting the downward rotation of the side plate portion 20. As a result, the leveling body 4 does not rotate downward from the predetermined lower limit position, and deformation of the leveling body 4 is suppressed.

  And this rotary work machine 1 can also perform the earthing work with the leveling body 4 positioned at the earthing work position as in the first embodiment, and also the leveling body during the back travel of the tractor 4 deformation can be prevented.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  In the rotary working machine 1 according to the third embodiment, the rotation restricting means 5 is of a pin + holding specification type, and the rectangular attachment is provided on the pin attachment body 61 of the second embodiment. In this configuration, a movement restricting unit 81 is added. The downward rotation restricting portion 81 is fixedly projected on a plate portion 80 extending at the lower end of the attachment plate 66 of the pin attachment body 61.

  Further, the concave portion 76 of the side plate portion 20 is used for the downward rotation restriction that abuts and engages with the downward rotation restriction portion 81 of the pin mounting body 61 instead of the engagement receiving surfaces 78 and 79 for the downward rotation restriction. The engagement receiving surface (engagement receiving portion) 82 is provided. The remaining configuration of the third embodiment is basically the same as the configuration of the second embodiment.

  When the rotary working machine 1 according to the third embodiment is used to move the soil of the farm scene by pulling the soil toward the corner of the farm field or the recess of the farm field, for example, As shown in FIGS. 13 and 14, the attachment / detachment pin 62 is attached to the first attachment hole 63 of the pin attachment body 61 by fitting.

  As a result, when the detachable pin 62 is mounted in the first mounting hole 63, the leveling body 4 is brought into contact by the contact engagement between the detachable pin 62 and the engagement receiving surface 77 for restricting the upward rotation of the side plate portion 20. Only the upward rotation is restricted, and the leveling body 4 is positioned in a substantially vertical posture at the earthing work position.

  When the rotary work machine 1 as a whole moves forward by the forward travel of the tractor, the leveling body 4 positioned at the earthing work position by the restriction of the upward rotation performs the earthing work while maintaining a substantially vertical posture. As indicated by a two-dot chain line in FIG. 14, the leveling body 4 is rotated downward by the contact engagement between the downward rotation restricting portion 81 and the engagement receiving surface 82 for restricting the downward rotation of the side plate portion 20. Only regulated.

  Further, when performing the normal tillage work using the rotary working machine 1, the operator attaches the detaching pin 62 to the second mounting hole 64 of the pin mounting body 61 as shown in FIG. Install by mating.

  As a result, when the detachable pin 62 is mounted in the second mounting hole 64, the leveling body 4 is in a free state in which the leveling body 4 can be rotated in the vertical direction within a predetermined range with respect to the machine body 2, and the tillage leveling work can be performed. Is possible. For example, as is clear from FIG. 15, the ground leveling body 4 in the free state can freely rotate upward to a position above the earthing work position because the attachment / detachment pin 62 and the engagement receiving surface 77 do not engage with each other. Can do.

  Further, when the attachment / detachment pin 62 is attached to the second attachment hole portion 64, for example, when the tractor travels back and a forward external force (force received from the soil) acts on the leveling body 4, the downward rotation is restricted. Only the downward rotation of the leveling body 4 is restricted by the contact engagement between the portion 81 and the engagement receiving surface 82 for restricting the downward rotation of the side plate portion 20. As a result, the leveling body 4 does not rotate downward from the predetermined lower limit position, and deformation of the leveling body 4 is suppressed.

  And also with this rotary working machine 1, like the said 1st and 2nd embodiment, the earthing work can be performed with the leveling body 4 positioned at the earthing work position, and the back of the tractor can be Deformation of the leveling body 4 can be prevented.

  In any of the embodiments, it is preferable to provide the rotation restricting means 5 on both the left and right sides of the rotary work machine 1, but the rotation restricting means 5 may be provided only on either the left or right side.

  In any of the embodiments, the leveling body 4 can be easily switched between a locked state and a free state without a tool. For example, a tool can be used with a configuration using bolts, nuts, and the like. The leveling body 4 may be locked and unlocked with respect to the body 2.

DESCRIPTION OF SYMBOLS 1 Rotary work machine 2 Airframe 3 Tillage body 4 Leveling body 5 Turning control means
20 Side plate
30 engaging pin
31 Engagement body
32 Rotation restrictor
45 engagement hole
61 pin mounting body
62 Detachment pin
63 First mounting hole
64 Second mounting hole
81 Lower rotation restricting part X Center axis of rotation

Claims (5)

A fuselage connected to the traveling vehicle;
A plowing body that is rotatably provided in this machine body and performs a plowing work while rotating,
A leveling body provided on the machine body so as to be pivotable in a vertical direction around a rotation center axis in a lateral direction, and performing leveling work behind the tillage body;
A rotation restricting means for restricting upward rotation about the rotation center axis of the leveling body with respect to the machine body and positioning the leveling body at the earthing work position;
The rotation restricting means is a rotary working machine that also functions as a deformation preventing means for restricting the downward rotation of the leveling body about the rotation center axis with respect to the machine body and preventing the leveling body from being deformed. And
The aircraft has a side plate portion,
The rotation restricting means is
And engaging body provided on the ground leveling member,
A rotation restricting body provided on the side plate portion and selectively switched between an engaged state and a disengaged state;
When the rotation restricting body is engaged, the upward movement of the leveling body is restricted by the engagement of the engaging body and the rotation restricting body, and the leveling body is positioned at the earthing work position.
The rotation at the time of engagement released state regulating body, said engaging member and said ground leveling body characteristics and to Carlo Rotary working machine that downward rotation is regulated by the engagement between the side plate portion. The engaging body has an engaging pin,
Rotation regulating body, the engaging pin and releasably has an engaging hole to be engaged, according to claim 1, characterized in that provided rotatably in the vertical direction in the side plate portion of the machine body Rotary work machine. The rotary working machine according to claim 1 or 2 , wherein the rotation restricting means restricts the upward and downward rotation of the leveling body and positions the leveling body in a locked state at the earthing work position. A fuselage connected to the traveling vehicle;
A plowing body that is rotatably provided in this machine body and performs a plowing work while rotating,
A leveling body provided on the machine body so as to be rotatable in the vertical direction, and performing leveling work behind the tillage body;
A rotation restricting means for restricting the upward rotation of the leveling body and positioning the leveling body at the earthing work position;
The aircraft has a side plate portion,
The rotation restricting means is
A pin mounting body provided in the leveling body and having a first mounting hole and a second mounting hole;
A desorption pin that is selectively attached to the first attachment hole and the second attachment hole;
When the detachable pin is attached to the first attachment hole, the upward movement of the leveling body is restricted by the engagement of the detachable pin and the side plate, and the leveling body is positioned at the earthing work position. ,
The rotary working machine, wherein when the detachable pin is attached to the second attachment hole portion, the downward rotation of the leveling body is restricted by the engagement between the detachable pin and the side plate portion. A fuselage connected to the traveling vehicle;
A plowing body that is rotatably provided in this machine body and performs a plowing work while rotating,
A leveling body provided on the machine body so as to be rotatable in the vertical direction, and performing leveling work behind the tillage body;
A rotation restricting means for restricting the upward rotation of the leveling body and positioning the leveling body at the earthing work position;
The aircraft has a side plate portion,
The rotation restricting means is
A pin mounting body provided on the leveling body and having a downward rotation restricting portion, a first mounting hole portion and a second mounting hole portion;
A desorption pin that is selectively attached to the first attachment hole and the second attachment hole;
When the detachable pin is attached to the first attachment hole, the upward movement of the leveling body is restricted by the engagement of the detachable pin and the side plate, and the leveling body is positioned at the earthing work position. ,
The rotary work is characterized in that when the detachable pin is attached to the second attachment hole, the downward rotation of the leveling body is restricted by the engagement of the downward rotation restricting part and the side plate part. Machine.

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