JP5331969B2 - Medium tillage weeder and medium tillage soil working method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intertillage weeding machine making easy the intertillage disk position changing work corresponding to the width between ridges, easy in switching work from intertillage work to ridging work, and decreased in the number of scrapers set on the disk. <P>SOLUTION: The intertillage weeding machine comprises an intertillage unit 20 intertilling the soil between ridges while proceeding between crop ridges, and a main frame 3 supporting the unit, wherein the intertillage unit 20 has a supporting frame 21 whose front end side is connected to the main frame 3 and which extends over the proceeding direction rear side, a pair of arm supporting parts 40 set on the supporting frame 21 and capable of being projected/retracted and adjusted the projecting length in the width direction between the ridges, and a back row disk 60 supported freely rotatably and on a state adjusted the angle of a disk 62 against the proceeding direction. The back row disk 60 is detachably mounted on the arm supporting part 40 and can be mounted on the other arm supporting part 40 while making an angle of the disk 62 against the proceeding direction same at a support position of one arm supporting part 40. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a middle tillage weeding machine that performs medium plowing and cultivation management operations with a plurality of disk pairs, and a middle tillage cultivation work method using the weeding machine.

  Conventionally, a pair of disks are arranged in two rows in the front and rear, and the tractor or riding management machine pulls forward to reverse the interstitial soil in the horizontal direction with these disks to perform middle plowing weeding work or cultivating (powdering) work A plowing weeder is known (for example, see Patent Document 1).

  As shown in FIG. 8A (plan view), the disc type middle tillage weeder 70 includes a middle tilling unit 72 that performs a middle tilling of a field on a tool bar 71 extending in the body width direction. The tillage unit 72 is supported by a frame mechanism 73 provided on the tool bar 71 so as to be movable up and down, and a front end portion is rotatably attached to the frame mechanism 73 and extends rearward in the traveling direction and is aligned in the body width direction. A first arm 74 and a second arm 75 are provided, and a front row disc 30 and a rear row disc 60 are attached to these arms and are used for medium-cultivating soil between the striations. The first arm 74 and the second arm 75 are provided such that the angle can be adjusted with respect to the arm angle adjusting plate 76 provided in the frame mechanism 73.

  A front row disk 30 is provided on each front side of the first arm 74 and the second arm 75, and a rear row disk 60 is provided on each rear side of the first arm 74 and the second arm 75. The front row disk 30 and the rear row disk 60 are supported so as to be rotatable about a rotation fulcrum provided on the corresponding first arm 74 and second arm 75 and to be adjustable in angle.

  As described above, the conventional disc type middle tiller 70 rotates the front row disc 30, the first arm 74 and the second arm 75, and the rear row disc 60 to rotate the width of the striations. The front row disk 30 and the rear row disk 60 are positioned at a position corresponding to the above, and middle tilling and cultivating work is possible.

JP 2007-259812 A

  The disc type middle tiller 70 having the conventional middle tilling unit 72 is configured so that the rear row disc 60 is placed in the width of the rear row disc in the state where the angle of the disc with respect to the traveling direction of the rear row disc 60 remains unchanged when the width of the rear row disc is changed. In order to move in the direction, it may be necessary to adjust the rotation of the rear disk 60 in addition to the adjustment of the rotation of the first arm 74 and the second arm 75. For this reason, since the position changing operation of the rear disc 60 according to the width of the striations is troublesome for the operator, there is a problem that it is desired to solve it.

  Further, the switching between the medium tillage work and the soil cultivating work by the conventional disk type medium tillage weeder 70 is performed by rotating the rear row disk 60 with respect to the first arm 74 and the second arm 75. Is a limited range, the rear disk 60 may not be set to a desired disk angle. In this case, it is necessary to adjust the rotation of the first arm 74 and the second arm 75. For this reason, the switching work between the medium tillage work and the cultivating work has a problem that the position changing work of the rear disc 60 is troublesome for the operator, as in the case of changing the width of the striations, and there is a problem to solve it.

  Further, when each of the pair of rear row disks 60 corresponding to the soil cultivation work shown in FIG. 8A is rotated, the rear row disk 60 shown in FIG. The scraper 65 provided on the working surface side of the rear row disk 60 moves from the outer side to the inner side of the disk, and has acted in a counter shape with respect to the rotation direction of the disk. Acts like a trail in the direction of rotation of the disk, and it becomes impossible to remove the soil adhering to the disk. For this reason, the conventional rear row disk 60 is provided with a scraper 65 for cultivating work and a scraper 65 ′ for medium tillage work, which causes an increase in the number of parts.

The present invention has been made to solve such problems and problems, and can easily change the position of the tilling disk according to the width of the striations. with a position changing work intertillage disk due to the switching can be easily performed, and aims to provide a intertillage soil working method using the intertillage herbicidal machine and the weeding machine can reduce the number of scraper provided on the disk To do.

In order to solve such a problem, the present invention has the following features. One of the features is a middle tillage unit having a middle tillage unit that cultivates the soil between the rows while advancing between the rows of the crop, and a main frame supporting the middle tillage unit. A support frame that is connected to the front end side and protrudes rearward in the traveling direction, a pair of arm support portions that are provided on the support frame and that can be protruded and retracted in the width direction between the strips and whose protrusion length can be adjusted, A medium tiller disc (for example, a disc angle adjusting support provided on each distal end side of the arm support portion is held so as to be adjustable with respect to the traveling direction and rotatably supported by a disc support rod extending vertically. and a rear row disc 60) in the embodiment, the disk angle adjusting support comprises a plurality of adjustment support plate provided with a predetermined distance in the vertical direction on the tip side of the arm support, these adjustments It has a pin insertion hole provided on one end side of the holding plate and a cylindrical member provided so as to be rotatable with respect to the adjustment support plate. A disk support rod is rotatable and fixed to the cylindrical member. An angle adjusting plate that is inserted in a possible manner and is provided above the adjusting support plate and has a plurality of adjusting holes (disc angle adjusting holes 52a in the embodiment) is provided, and the disc supporting rod is fixed to the cylindrical member. In this state, the cultivated disc is rotated through the angle adjusting plate, and the fixing pin (the disc fixing pin 53 in the embodiment) is inserted into the adjusting hole and the pin insertion hole of the angle adjusting plate to adjust the angle of the cultivated disc. and, the disk angle adjusting support intertillage from intertillage disk detachably attached with an angle adjusted intertillage disc angle adjusting support angle while mounted while the same of the disk disk The removed, characterized in that attachable to the disc angle adjusting support which is provided on the other arm support.

  According to this feature, the middle tilling unit for medium tillage of the soil between the strips is provided on the support frame with the front end side connected to the main frame and projecting to the rear side in the traveling direction, and protrudes in the width direction between the strips. A pair of arm supports that can be freely adjusted and the length of the protrusions can be adjusted, and a disk angle adjustment support provided on each tip side of the pair of arm supports so that the angle can be adjusted with respect to the direction of travel. The medium tilling disc is supported in such a manner that the angle of the disc with respect to the traveling direction of the medium tilling disc is left as it is according to the width of the striation. When moving in the width direction, it is only necessary to adjust the protruding length of the arm support so that the position of the medium tillage disk moves to a predetermined position according to the width of the striations. Section is not required. For this reason, it is possible to easily perform the position adjustment work of the medium tillage disk.

  In addition, the disk angle adjusting support is configured such that the medium tilling disk is detachably attached and the angle adjusting medium is removed from the disk angle adjusting support while the angle of the medium adjusting disk is kept the same. When switching from medium tillage work to cultivating work, or from cultivating work to medium cultivating work, a pair of medium cultivated disks supported by the arm support part can be attached to the disk angle adjusting support provided on the support part. Remove from each support position, attach the tilling disk supported by one arm support part to the support position of the other arm support part with the same angle of the disk, and support the tilling disk supported by the other arm support part The disk is attached to the support position of one arm support part while keeping the angle of the disk the same. For this reason, for example, a pair of cultivated discs arranged in a U shape in plan view in order to perform soil cultivation work can be arranged in an inverted C shape in plan view, and the cultivating work can be performed by these cultivated discs. It becomes possible to do. In addition, a pair of medium-cultivated discs arranged in an inverted U shape in a plan view can be arranged in a C shape in a plan view, and the soil cultivation work can be performed by these medium-cultivated discs. For this reason, when switching from medium tillage work to cultivating work, or from cultivating work to medium cultivating work, the switching work is completed simply by removing the cultivating disk from one arm support and attaching it to the other arm support. Can be.

  In addition, if the medium tillage disk corresponding to the soil cultivation work is removed from the supported one arm support part and attached to the other arm support part while keeping the same angle of the disk, it is provided on the one side surface of the medium tillage disk. The relative position of the scraper that removes soil adhering to the surface with respect to the disk does not change. Further, the rotation direction of the pair of tillage disks is the same. Therefore, the scraper that has acted in a counter-like manner with respect to the rotating direction of the disc always acts in a counter-like manner with respect to the rotating direction of the disc even if the attachment position of the medium tillage disc changes from one of the arm support portions to the other. . For this reason, the number of scrapers can be reduced and the number of parts can be reduced compared with the conventional medium tilling disk which required two scrapers for soil cultivation work and medium tillage work. Cost increase can be suppressed. In addition, since the number of scrapers installed on the medium tillage disk can be minimized, the residue bite where grass, straw, leaves, etc. are caught between the disk and the scraper, and the soil pool where soil accumulates on the back side of the scraper. Generation | occurrence | production can be suppressed and the fall of the function of a scraper can be suppressed.

  The extending direction of the support frame only needs to protrude to the rear side in the traveling direction, and may be, for example, a direction along the traveling direction or a direction projecting obliquely rearward with respect to the traveling direction. Further, the arm support portion may be anything as long as it can project and retract, and may be, for example, a telescopic member, a telescopic cylinder, or a slide member configured in a nested manner. The disk angle may be adjusted as long as the disk angle can be freely adjusted. For example, a motor for rotating the disk with respect to the support frame is provided, and the rotation angle of the drive shaft of the motor is adjusted. You may control.

  In addition, one of the features is that the medium tillage disk is movable in the width direction of the striations by protruding and retracting the arm support portion.

  According to this feature, the cultivated disc is movable in the width direction between the strips by the projecting and retracting of the arm support portion. Move in the width direction between. That is, the medium tillage disk is offset and moved in the width direction between the strips. For this reason, it is possible to easily adjust the distance between the tilling discs (disc width) while keeping the disc angle constant, and to make it easier to adjust the position of the tilling disc according to the width of the streak. it can. In addition, since the arm support portion can be projected and retracted, even when the gap is narrow, the protrusion amount of the arm support portion becomes small, and the tip of the arm support portion can hardly hit the leaf of the crop (for example, soybean leaf). it can.

  One of the features is that the support frame is supported so as to be movable in the vertical direction with respect to the main frame.

  According to this feature, the support frame is supported so as to be movable in the vertical direction with respect to the main frame, so that the medium tillage disk can be moved in the vertical direction according to the unevenness of the soil between the crops, Medium tillage depth can be made constant. In addition, when there are large stones in the field, the support frame moves upward when the medium tillage disk touches the stone, etc., and the medium tillage disk can be retracted upward such as the stone to prevent damage to the medium tillage disk. can do. The support frame may be of any support structure as long as it is supported so as to be movable in the vertical direction with respect to the main frame. For example, the front end side of the support frame is rotatably supported by the main frame. The front end side of the support frame may be supported so as to be slidable in the vertical direction with respect to the main frame.

One of the features is that it has a cultivating unit that cultivates the soil between the struts while advancing through the streak of the crop. A support frame to be taken out, a pair of arm support portions which are provided on the support frame and can be protruded and retracted in the width direction between the strips and can be adjusted in protrusion length, and a disc provided on each tip side of the pair of arm support portions and a intertillage disk angle to the traveling direction at the corner adjustment support is rotatably supported with respect to disc support rods are adjustably held vertically extending, disc angle adjusting support arm support A plurality of adjustment support plates provided at predetermined intervals in the vertical direction on the front end side of each of these, and a pin insertion hole provided on one end side of these adjustment support plates and provided so as to be rotatable with respect to the adjustment support plate The cylindrical member In addition, the cylindrical member is provided with an angle adjustment plate having a plurality of adjustment holes disposed above the adjustment support plate, and the disc support rod is rotatably and fixedly inserted. A medium tillage weed that adjusts the angle of the medium tillage disk by rotating the medium tillage disk through the angle adjusting plate in a state where the rod is fixed to the cylindrical member, and inserting the fixing pin into the adjustment hole and the pin insertion hole of the angle adjusting plate. This is the medium tillage work method of the machine, and when the medium tillage work is carried out from the medium tillage work, or when the medium tillage work is carried out from the soil tillage work, the traveling direction of the medium tillage disk whose angle is adjusted by the disk angle adjusting support provided on one arm support part Attach the cultivated disc removed from the disc angle adjustment support to the disc angle adjustment support provided on the other arm support while keeping the angle of the disc relative to Characterized in that it move forward between, Article.

  According to this feature, when performing medium tillage work from cultivating work or medium cultivating work from cultivating work, the disk is adjusted in the traveling direction of the medium cultivated disk that is angle-adjusted by the disk angle adjusting support provided on one arm support part. For example, soil cultivation work by advancing the space by attaching the tilled disk removed from the disk angle adjustment support body to the disk angle adjustment support body provided on the other arm support part with the same angle of In order to carry out the above, a pair of medium tilling disks arranged in a letter C shape in plan view are arranged in a reverse letter C shape in plan view and moved forward, so that the medium tillage work can be performed by these medium tilling disks. In addition, a pair of cultivated discs arranged in a reverse C shape in a plan view are arranged in a C shape in a plan view and moved forward, so that the cultivating work can be performed with these cultivated discs. For this reason, when switching from the medium tillage work to the medium cultivation work or from the medium cultivation work to the medium cultivation work, the switching work is completed simply by changing the mounting position of the pair of medium cultivation disks, and therefore the switching work can be easily performed.

  According to the middle tillage weeding machine and the middle tillage soil working method according to the present invention, by having the above-mentioned characteristics, it is possible to easily change the position of the middle tillage disk according to the width of the stripes. It is possible to provide a middle tillage weeding machine and a middle tillage cultivating work method that can easily change the position of the middle tilling disk accompanying the work switching and can reduce the number of scrapers provided on the disk.

  Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. The middle tillage weeder advances the work along the striations in a state where the middle tilling unit is grounded on the field scene between the streak of the crops by traction by a traveling body.

  As shown in FIG. 1 (plan view) and FIG. 2 (side view), the middle plowing weeder 1 is connected to the front part of the main frame 3 extending in the width direction by a three-point link connection provided at the rear part of the traveling machine body 90. A connecting portion 5 having a mast 6 and a lower hitch pin 7 connected to the mechanism is provided, and is attached to the rear portion of the traveling machine body 90 so as to be movable up and down. A gauge support arm 9 that projects forward is provided on the front side of the left and right tillage units 20 ′, and the height of the gauge ring support rod 12 of the gauge ring 11 is adjustable at the tip of the gauge support arm 9. It is installed. This height adjustment is performed by fixing an adjustment hole 12a provided in the gauge wheel support rod 12 with a fixing pin 13 in accordance with a support hole provided in the gauge support arm 9, and a front row disk described later. 30 and the rear row disk 60 is performed to adjust the tilling depth.

  In the axial direction of the main frame 3, middle tilling units 20 and 20 ′ are provided for middle tilling soil with a predetermined interval. In the present embodiment, a three-row medium-cultivating weeder 1 in which three medium-cultivating units 20, 20 ′ are arranged is shown. Since the three middle tilling units 20 and 20 ′ have the same structure, only the middle tilling unit 20 disposed in the center of the machine body width direction will be described, and the other middle tilling units 20 ′ have the same reference numerals for the same mode portions. The description is omitted.

  The middle tilling unit 20 is connected to the main frame 3 so that the front end side thereof is movable in the vertical direction and extends to the rear side in the traveling direction, and a pair of front row disks 30 provided rotatably on the front side of the support frame 21. A pair of arm support portions 40 provided on the rear side of the support frame 21 so as to protrude and retract on one side and the other side in the width direction of the striations, and rotatably provided on the respective distal end sides of the pair of arm support portions 40. And a rear row disk 60.

  The support frame 21 is provided with a pair of connecting frames 22 projecting upward and downward on both sides in the width direction of the front end portion. Between the upper side of the connection frame 22 and the main frame 3, the front end portion is rotatably attached to the main frame 3, and the rear end portion is rotatably attached to the connection frame 22 and is arranged in parallel in the vertical direction. A pair of frame connecting members 23 are provided. The pair of frame connecting members 23 form a parallel link mechanism, and the middle tilling units 20 and 20 ′ can move in the vertical direction while remaining substantially horizontal.

  The front row disk 30 will be further described with reference to FIG. 3 (rear view). The rear end side of the swing arm 24 that is pivotally attached between the lower ends of the pair of connecting frames 22 and extends rearward. Is attached. The swing arm 24 includes a rotation center shaft 25 projecting upward on the front side. The rotation center shaft 25 is rotatably supported between the lower ends of the pair of connecting frames 22. Is swingable in the width direction of the machine body about the rotation center axis 25.

  A support plate 26 projecting downward is provided at the rear end portion of the swing arm 24, and the central shaft 30 a of the front row disk 30 is rotatably supported by the lower end portion of the support plate 26. For this reason, when the swing arm 24 is swung, the front row disk 30 is swung around the rotation center shaft 25 and the angle of the disk can be adjusted. It should be noted that the swing arm 24 is capable of restricting the rotation of the swing arm 24 in a state where the front disk 30 has a desired disk angle.

  In the present embodiment, one front row disc 30 of the pair of front row discs 30 is disposed on the front side (connecting portion side) with respect to the other front row disc 30, and the pair of front row discs 30 has a square shape in plan view. It is arranged in a shape.

  The arm support portion 40 provided on the rear side of the support frame 21 is configured by combining a proximal end member 41 and a distal end member 43 in a nested manner. The base end member 41 is attached to the support frame 21 and protrudes in the body width direction, and the distal end member 43 is inserted into the internal space of the base end member 41 and can project from the distal end portion of the base end member 41. The distal end member 43 has a distal end with respect to the proximal end member 41 by inserting a fixing pin 44 so that the pin insertion hole 43a provided in the sidewall is aligned with the locking hole 41a provided in the sidewall of the proximal end member 41. The distal end member 43 can be fixed to the proximal end member 41 in a state where the protruding amount of the member 43 is adjusted. In the present embodiment, the shape of the proximal end member 41 and the distal end member 43 is shown as a rectangular tube shape. However, any shape can be used as long as the proximal end member 41 and the distal end member 43 can be nested. For example, it may be cylindrical or triangular.

  As shown in FIG. 4A (plan view) and FIG. 5 (enlarged sectional view taken along arrow A in FIG. 4B), one end side of the distal end member 43 is provided with a plurality of pin insertion holes and is on the rear side. A disk angle adjusting support body 45 is provided so as to project to the outside. The disk angle adjusting support 45 is provided with a pair of adjusting support plates 46 arranged side by side with a predetermined interval in the vertical direction, and a pin insertion hole 47a provided in a state of being inserted through the front end side of these support plates. And a plurality of pipe members 47. The tube member 47 has a predetermined interval on an arc having predetermined distances R1 and R2 (R2> R1) from the center of the insertion hole 48 formed at the end of the base end side of the disk angle adjusting support 45. A plurality are arranged. The tube member 47 is attached in a state in which the tube member 47 faces in a direction substantially orthogonal to the disk angle adjustment support body 45.

  A cylindrical member 50 is rotatably inserted into an insertion hole 48 provided in the disk angle adjustment support body 45. The cylindrical member 50 includes a cylindrical main body 51 into which the disk support rod 61 of the rear disk 60 is inserted, and an angle adjusting plate 52 that is provided on the upper side of the cylindrical main body 51 and projects outward. A nut 54 is fixed to the outer peripheral surface on the upper side of the cylindrical main body 51 with a predetermined interval in the circumferential direction, and a hole 54 a is formed on the side wall of the cylindrical main body 51 facing the hole 54 a of the nut 54. A communication hole that communicates with is formed. By screwing the disc fixing bolt 55 into the hole 54 a, the disc support rod 61 inserted into the cylindrical member 50 can be fixed to the cylindrical member 50.

  A plurality of disk angle adjustment holes 52 a communicating with the pin insertion holes 47 a are provided on the distal end side of the angle adjustment plate 52. A plurality of disk angle adjusting holes 52a are arranged at predetermined intervals on an arc having predetermined distances R1 and R2 (R2> R1) from the center of the insertion hole 48. Therefore, in a state where the disk support rod 61 is inserted and fixed to the cylindrical member 50, the cylindrical member 50 is rotated with respect to the disk angle adjustment support body 45, and the disk angle adjustment hole 52a is moved to the pin insertion hole 47a. By inserting the disk fixing pin 53 in a state of communicating with the disk, the rear disk 60 provided at the lower part of the disk support rod 61 can be fixed in a state set to a desired disk angle θ with respect to the traveling direction. .

  Further, when the fastening by the disk fixing bolt 55 is released, the disk support rod 61 can be pulled out of the cylindrical member 50. Therefore, one side of the pair of rear row disks 60 attached to both sides of the support frame 21 can be attached to the other cylindrical member 50, and the other rear row disk 60 can be attached to the one side cylindrical member 50. .

  As shown in FIG. 4C (partial sectional rear view), the rear row disk 60 includes a disk 62 formed in a shallow dish shape with a depressed central portion, and the disk support rod described above for rotatably supporting the disk 62. 61. The disk 62 has a concave side formed as a concave surface 62a and a side opposite to the concave side formed as a convex surface 62b. The concave surface 62a of the disk 62 functions as an action surface for moving the soil between the streaks when the medium tillage work or soil cultivation is performed, and the rear surface disk 60 has the concave surface 62a of the disk 62 at the time of middle tillage work or soil cultivation work. It is arrange | positioned so that it may face the inner side or the outer side.

  As shown in FIG. 4B (partial cross-sectional side view), a scraper 65 is provided on the side of the concave surface 62a of the rear row disk 60 to scrape off the dirt adhering to the disk surface during operation. The scraper 65 is formed by bending a substantially parallelogram-shaped metal plate, a scraping blade 65a is formed on one short side, and a frame mounting portion 65b is formed on the other short side.

  The scraper 65 is supported via a support frame 68 having one end attached to the disk support rod 61. As shown in FIG. 4 (a), the support frame 68 extends from the disk support rod 61 to a position outside the outer edge of the convex surface 62b, and then bends to the concave surface 62a side and extends beyond the convex surface 62b. And is formed so as to protrude along the convex surface 62b. A frame attachment portion 65b of the scraper 65 is detachably attached to a portion protruding along the convex surface 62b via fastening means such as a bolt. In addition, the arrow B shown in FIG.4 (b) has shown the direction where the back row disk 60 rotates as the middle plowing weeder 1 moves forward.

  The disc support rod 61 that rotatably supports the disc 62 will be described with further addition of FIG. 4C. A rotary shaft 67 projects from the lower end of the disc support rod 61, and the rotary shaft 67 is formed at the center of the disc 62. The disc 62 is rotatably supported by fitting with a bearing 63 provided. The disc support rod 61 extends upward from the central portion on the convex surface 62 b side of the disc 62, bends toward the concave surface 62 a around the outer edge of the disc 62, and extends obliquely upward to the outside of the upper end portion of the disc 62. It is formed to bend from the outer side of the upper end and extend upward. On the upper side of the disc support rod 61, a flange portion 64 is provided for positioning the tubular member 50 with respect to the axial position of the disc support rod 61 when the tubular member 50 is externally fitted.

  Next, the operation in the case where the cultivating work is performed by the medium plowing weeder 1 configured as described above will be described. FIGS. 1 and 6 show the state of the middle tillage weeder 1 when performing the culturing work. As shown in FIGS. 1 and 6, the front row disk 30 and the rear row disk 60 are not shown in plan view. It is arranged in a letter shape. At this time, the concave surfaces 62a of the front row disc 30 and the rear row disc 60 are both attached to face the outside of the machine body. Prior to the work, the height of the gauge wheel 11 described above is adjusted to adjust the contact depth of the disk.

  When the middle plowing weeder 1 set in this way moves forward, the front row disc 30 causes the soil at the center of the streak to move primarily to both sides of the streak (in the left-right direction of the streak), and the rear row disc 60 disposed behind it. As a result, the soil that has been primarily moved further moves in the left-right direction.

  When performing such culturing work, if the distance between the stripes changes, it is necessary to appropriately set the position of the rear disk 60 in the width direction of the stripes. In this embodiment, the intermediate weeding machine 1 is provided with the pair of arm support portions 40 that can be protruded and retracted on the support frame 21, so that it is easy to adjust the position of the rear row disk 60 only by adjusting the protruding amount of the arm support portion 40. Can be done.

  For example, when the inter-strip distance is short, the protruding amount of the arm support portion 40 is reduced, and when the inter-strip distance is long, the protruding amount of the arm support portion 40 is increased. The adjustment work of the protruding amount of the arm support portion 40 is performed by removing the fixing pin 44 inserted between the distal end member 43 and the proximal end member 41 so that the distal end member 43 has a desired protruding amount with respect to the proximal end member 41. , The pin insertion hole 43a is aligned with the locking hole 41a, and the fixing pin 44 is inserted to fix the distal end member 43 to the proximal end member 41. As described above, when the protruding amount of the arm support portion 40 is adjusted, it is possible to move the rear row disk 60 while keeping the disk angle of the rear row disk 60 constant. That is, the rear disk 60 can be offset.

  Moreover, since the middle tillage weeder 1 can adjust the disk angle θ of the front row disk 30 and the rear row disk 60, the amount of soil movement by each disk can be adjusted. For example, when the amount of soil to be cultivated is increased, the disk angle θ of the disk is set to be large, and when the amount of soil to be cultivated is decreased, the disk angle θ of the disk is set to be small. Thus, the middle tillage weeder 1 according to the present embodiment can perform soil cultivation work under various conditions by adjusting the disk angle θ and the protruding amount of the arm support portion 40.

  FIG.7 (b) (partial top view of a middle tillage weeder) shows an example of the state of the middle tillage weeder 1 when performing a middle tillage weed. When middle plowing weeding is performed, the pair of rear row disks 60 are arranged in a reverse C shape in plan view. At this time, the concave surface 62a of the rear disk 60 is arranged so as to face the inner side of the machine body, that is, the support frame 21 side. And, in the process of repeating primary middle cultivation and secondary middle cultivation by the front row disk 30 and the rear row disk 60, the moving soil is reversed, and the weeds processed during that time can be buried in the moving soil to increase the weeding effect. .

  As described above, when cultivating work is performed, as shown in FIG. 7A (partial plan view of the middle tillage weeder), the rear row disk 60 is arranged in a C shape in plan view. If the orientation of the rear row disk 60 is changed when switching to the medium tillage operation, the rear row disk 60 can be arranged in a reverse C shape with the concave surface 62a of the disk 62 facing inward.

  However, in this case, for example, in the case of the rear row disc 60 disposed on the left side in the inter-strip width direction, the scraper 65 provided on the working surface side of the rear row disc 60 moves from the outer side to the inner side of the disc, The scraper 65 that has acted in a counter-like manner with respect to the rotation direction of the disc acts in a trail-like manner with respect to the rotation direction of the disc, so that the soil adhering to the disc cannot be removed. For this reason, the conventional rear row disk 60 is provided with two scrapers for soil cultivation work and medium tillage work shown in FIG.

  On the other hand, in the middle tillage weeding machine 1 according to the present embodiment, when switching from the cultivating work to the middle tilling work, as shown in FIGS. 7A and 7B, it is supported by the arm support portion 40. The pair of rear row discs 60, 60 'are removed from their respective support positions, and the rear row disc 60 supported by the arm support portion 40 protruding leftward in the inter-strip width direction is kept at the same angle of the disc 62. Attach to the support position of the arm support portion 40 that protrudes to the right in the width direction, and the rear row disk 60 ′ supported by the arm support portion 40 that protrudes to the right in the width direction of the striations, with the angle of the disk 62 being the same, It is attached to the support position of the arm support portion 40 that protrudes to the left in the inter-strip width direction. The rear discs 60 and 60 'rotate as the airframe advances, but the direction of rotation is always constant and is the direction indicated by the arrow B in FIG.

In the middle tillage weeding machine 1 according to the present embodiment, when switching from the cultivating work to the middle tilling work, each of the pair of rear-row disks 60 and 60 ′ is kept at the same angle of the disk 62, and the other arm support section 40. It is attached to the support position. In this way, the relative position of the scraper 65 provided on the concave surface 62a on one side of the rear row discs 60, 60 ′ does not change. The rotation direction of the pair of rear row disks 60 is the same. Therefore, the scraper 65 acting in a counter-like manner with respect to the rotation direction of the disk 62 is arranged in the rotation direction of the disk 62 even if the mounting position of the rear row disks 60, 60 ′ is changed from one of the arm support portions 40 to the other. On the other hand, it always acts like a counter. Therefore, as compared with the conventional rear row disk 60 shown in FIG. 8A, only one scraper 65 is required, the number of parts can be reduced, and the cost increase of the middle tillage weeder 1 can be suppressed. .

  Further, the work for changing the mounting position of the rear row discs 60, 60 ′ is performed by loosening the disc fixing bolt 55 for fixing the disc support rod 61 of one rear row disc 60 to remove the disc support rod 61 from the cylindrical member 50. The disc fixing bolt 55 for fixing the disc supporting rod 61 of the other rear row disc 60 ′ is loosened, and the disc supporting rod 61 is removed from the cylindrical member 50. Then, the disc support rod 61 is inserted into the cylindrical member 50 that has fixed the other disc support rod 61 while the disc angle remains the same as before removal, and the disc fixing bolt 55 is fastened to tighten the rod. Is fixed to the cylindrical member 50. Further, the disc support rod 61 is inserted into the cylindrical member 50 that has fixed the one disc support rod 61 with the angle of the disc being the same as before the removal, and the disc fixing bolt 55 is fastened to fix the disc support rod. 61 is fixed to the cylindrical member 50. As described above, the work for changing the mounting position of the rear disk 60, 60 ′ is only the rotation operation of the disk fixing bolt 55 and the insertion / extraction operation of the disk support rod 61 with respect to the cylindrical member 50. It is easy to change the mounting position.

  On the other hand, when switching from medium tillage work to soil cultivation work, the above-described work for switching from soil cultivation work to medium tillage work may be performed in reverse. Since this work content conforms to the work for switching from the cultivating work to the tilling work, the description thereof is omitted.

  In the above-described embodiment, the case where the disk angle of the front row disk 30 can be adjusted via the swing arm 24 is shown. However, an arm support portion 40 is provided on the front side of the support frame 21, and this arm support portion is provided. The front row disk 30 may be provided at the front end portion of 40 so that the disk angle can be adjusted. If it does in this way, cultivating work and cultivating work of various conditions can be performed.

The top view of the middle tillage weeder concerning one embodiment of the present invention is shown. The side view of the middle tillage weeder concerning one embodiment of the present invention is shown. The rear view of the middle tillage weeder concerning one embodiment of the present invention is shown. The middle tillage unit provided in the middle tillage weeder is shown. FIG. (A) is a plan view of the middle tillage unit, (b) is a side view of the middle tillage unit, and (c) is the back of the middle tillage unit. FIG. The expanded sectional view of the part which was A arrow view of Drawing 4 (b) is shown. The rear view of the middle tillage weeder when carrying out cultivating work with the middle tillage weeder is shown. The top view of the tilling unit for explaining the switching work for switching between the soil cultivation work and the medium tillage work is shown. FIG. 11A is a plan view of the tilling unit when the soil cultivation work is performed, and FIG. It is a top view of the tillage unit when performing. The conventional middle tillage weeder is shown, the figure (a) is a plan view of the middle tillage weeder in a state where the cultivating work is performed, and the figure (b) is a plan view of the middle tillage weeder in a state where the middle tilling work is performed. is there.

DESCRIPTION OF SYMBOLS 1 Medium tillage weeder 3 Main frame 20 Medium tillage unit 21 Support frame 40 Arm support part 45 Disc angle adjustment support body 46 Adjustment support plate 47a Pin insertion hole 50 Cylindrical member 52 Angle adjustment plate 52a Disc angle adjustment hole (adjustment hole)
53 Disc fixing pin (fixing pin)
60 Back row disc (Nakacho disc)
61 Disc support rod

Claims (4)

A middle tillage unit comprising a middle tillage unit for cultivating soil between the rows while advancing the row of crops, and a main plowing weeder having a main frame that supports the middle tillage unit,
The middle tillage unit is
A support frame that is connected to the main frame at the front end side and projects to the rear side in the traveling direction;
A pair of arm support portions provided on the support frame and capable of protruding and retracting in the width direction between the strips and adjusting the protruding length;
A medium-tillage disc that is supported by a disc angle adjustment support provided on each tip side of the pair of arm support portions so that the angle is adjustable with respect to the traveling direction and is rotatably supported by a disc support rod that extends in the vertical direction. And
The disk angle adjustment support body includes a plurality of adjustment support plates provided at predetermined intervals in the vertical direction on the distal end side of the arm support portion, and a pin insertion hole provided on one end side of these adjustment support plates. And a cylindrical member provided rotatably with respect to the adjustment support plate,
The cylindrical member is provided with an angle adjustment plate having a plurality of adjustment holes disposed above the adjustment support plate while the disc support rod is rotatably and fixedly inserted.
With the disk support rod fixed to the cylindrical member, the medium tillage disk is rotated through the angle adjustment plate, and a fixing pin is inserted into the adjustment hole and the pin insertion hole of the angle adjustment plate. Adjust the angle of the medium tillage disk,
The disk angle adjusting support is configured to detachably attach the medium tilling disk and remove the medium tilling disk from one disk angle adjusting support attached with the angle of the adjusted medium tilling disk kept the same. A plowing weeder characterized in that it can be attached to a disk angle adjusting support provided on an arm support. The medium-cultivating weeder according to claim 1 , wherein the medium-cultivating disk is movable in a width direction between the strips by projecting and retracting the arm support portion. The middle-cultivating weeder according to claim 1 or 2 , wherein the support frame is supported so as to be movable in the vertical direction with respect to the main frame. A middle tilling unit that mediumly cultivates soil between the streak while proceeding between the streaks of the crop, the middle tilling unit is connected to a main frame that supports the front end side, and a support frame that protrudes to the rear side in the traveling direction, A pair of arm support portions that are provided on the support frame and can be protruded and retracted in the width direction between the strips to adjust the protrusion length, and a disc angle adjustment provided on each tip side of the pair of arm support portions A cultivated disc that is held on the support so that the angle thereof can be adjusted with respect to the traveling direction and is supported rotatably with respect to the disc support rod extending in the vertical direction, and the disc angle adjusting support is provided with the arm support portion. A plurality of adjustment support plates provided at predetermined intervals in the vertical direction on the front end side of the pins, pin insertion holes provided on one end side of these adjustment support plates, and rotatable relative to the adjustment support plate Provided And a tubular member,
The cylindrical member is provided with an angle adjustment plate having a plurality of adjustment holes disposed above the adjustment support plate while the disc support rod is rotatably and fixedly inserted.
With the disk support rod fixed to the cylindrical member, the medium tillage disk is rotated through the angle adjustment plate, and a fixing pin is inserted into the adjustment hole and the pin insertion hole of the angle adjustment plate. A medium tillage working method for adjusting the angle of the medium tillage disk ,
When performing medium tillage work from cultivating work or medium tilling work from cultivating work, the angle of the disc with respect to the traveling direction of the cultivated disc adjusted by the disc angle adjusting support provided on one arm support portion remains the same. The middle tillage medium of the middle tillage weeding machine, wherein the middle tillage disk removed from the disk angle adjustment support body is attached to the disk angle adjustment support body provided on the other arm support portion and advanced between the strips. Work method.

Images