Mu-standing unit and mu-standing machine

Abstract

To provide a ridger unit that can facilitate angle adjustment operation of a disk.SOLUTION: A ridger unit 20A is equipped with a disk angle adjustment part 42 which is installed in an arm support 41 and which supports a disk support rod 43 in a manner that can adjust an angle θ for the advancing direction of a back row disk 40. The disk angle adjustment part 42 includes: a sheet of adjustment support plate 51 that is fastened to the arm support 41, that rotatably supports the disk support rod 43, and that has pin insertion holes 511, 512; an angle adjustment plate 53 that is rotatably supported integrally with the disk support rod 43, and that has one adjustment hole 531; and a fixation pin 57 that can be inserted into the pin insertion holes 511, 512 and the adjustment hole 531. The angle θ of the back row disk 40 is adjusted by inserting the fixation pin 57 into the pin insertion holes 511, 512 and the adjustment hole 531, in a state where the disk support rod 43 is rotated so that the angle θ of the back row disk 40 becomes a prescribed angle.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a ridge-forming unit and a ridge-forming machine.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1, there is known a disk-type intertillage weeding machine configured by arranging a pair of disks in two rows front and back and pulling them by a tractor or a riding management machine, and in which the disks laterally invert and move the soil between rows to perform intertillage weeding work or soil banking (soil hilling) work.

[0003] Such an intertillage weeding machine includes an intertillage unit having a support frame connected to a main frame, an arm support portion provided on the support frame so as to be able to project and retract in the width direction, and a disk supported by the arm support portion via a disk angle adjustment support body.

[0004] The disk angle adjustment support body of the intertillage unit has a plurality of adjustment support plates provided at a predetermined interval in the vertical direction on the tip side of the arm support portion, pin insertion holes provided on one end side of these adjustment support plates, and a cylindrical member rotatably provided with respect to the adjustment support plates. A disk support rod for rotatably and fixably supporting the disk is rotatably and insertably inserted into the cylindrical member, and an angle adjustment plate having a plurality of adjustment holes is provided above the adjustment support plates.

[0005] Then, with the disk support rod fixed to the cylindrical member, the disk is rotated through the angle adjustment plate, and a fixing pin is inserted through the adjustment holes of the angle adjustment plate and the pin insertion holes formed in the adjustment support plates, so that the angle of the disk is adjusted.

[0006] Thus, an intertillage weeding machine provided with a disk configured to be angle-adjustable can also be used as a ridge-forming machine that laterally moves the soil with the disk to form ridges.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] In the above-mentioned disk angle adjustment support, a plurality of adjustment holes are formed in the angle adjustment plate, and a plurality of pin insertion holes are formed in the adjustment support plate. When adjusting the angle of the disk, it is necessary to select the adjustment hole through which the fixing pin is inserted from among the plurality of adjustment holes and select the pin insertion hole through which the fixing pin is inserted from among the plurality of pin insertion holes. Therefore, the operation of adjusting the angle of the disk has been complicated.

[0009] Also, a plurality of adjustment support plates are provided at intervals in the vertical direction, and the fixing pin is configured to be inserted into the pin insertion holes provided across the upper and lower adjustment support plates. Therefore, the amount of movement of the fixing pin when inserting and removing the fixing pin into and from the pin insertion hole becomes large, and the operation of adjusting the angle of the disk has been complicated.

[0010] Therefore, the present invention provides a ridging unit and a ridging machine capable of easily performing the operation of adjusting the angle of the disk.

Means for Solving the Problems

[0011] The ridging unit and the ridging machine for solving the above problems have the following features.

[0012] That is, the ridging unit is a ridging unit that performs operations on the soil while moving, and includes a support frame extending along the moving direction of the ridging unit, an arm support portion supported by the support frame and extending in the width direction intersecting the moving direction, a ridging disk grounded on the soil, a disk support rod extending in the vertical direction and rotatably supporting the ridging disk, and a disk angle adjustment portion attached to the arm support portion and supporting the disk support rod so as to be able to adjust the angle of the ridging disk with respect to the moving direction. The disk angle adjustment portion includes a single adjustment support plate fixed to the arm support portion and rotatably supporting the disk support rod and having a pin insertion hole, an angle adjustment plate integrally and rotatably supported on the disk support rod and having one adjustment hole, and a fixing pin insertable into the pin insertion hole and the adjustment hole. The pin insertion holes are formed in a plurality of locations along an arc having a first radius centered on the rotation center of the disk support rod in the adjustment support plate, and are also formed in a plurality of locations along an arc having a second radius smaller than the first radius centered on the rotation center of the disk support rod in the adjustment support plate. The adjustment holes are formed in an elongated hole shape having the radial direction of the arc centered on the rotation center of the disk support rod as the major axis direction. The fixing pin is movable in the radial direction within the adjustment hole. With the disk support rod rotated so that the angle of the ridging disk becomes a predetermined angle, the fixing pin is inserted into the pin insertion hole and the adjustment hole, thereby adjusting the angle of the ridging disk.

[0013] Accordingly, it is not necessary to select an adjustment hole through which the fixing pin is inserted, and the angle adjustment operation of the ridging disk can be easily performed. In addition, the amount of movement of the fixing pin required when inserting and removing the fixing pin with respect to the pin insertion hole can be reduced, and the angle adjustment operation of the ridging disk can be facilitated. Further, by moving the fixing pin in the radial direction within the adjustment hole, it can be selectively inserted into either the pin insertion hole formed in a location along the arc having the first radius or the pin insertion hole formed in a location along the arc having the second radius. Therefore, the operation of adjusting the angle of the ridging disk can be made easier.

[0014] Further, the disk angle adjustment portion has a biasing member that biases the fixing pin in a direction in which the fixing pin is inserted through the pin insertion hole.

[0015] Accordingly, the fixing pin can be automatically moved downward by the biasing force of the biasing member and inserted into the pin insertion hole, and the angle adjustment operation of the ridging disk can be easily performed.

[0016] Further, the ridge forming machine includes a main frame extending in the width direction intersecting the traveling direction, and a plurality of the ridge forming units according to any one of claims 1 to 3 mounted on the main frame.

[0017] Accordingly, in the ridge forming machine, the operation of adjusting the angle of the ridge forming disk can be easily performed.

Effects of the Invention

[0018] According to the present invention, the operation of adjusting the angle of the ridge forming disk can be easily performed.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0020] Next, modes for carrying out the present invention will be described with reference to the accompanying drawings.

[0021] [Ridge Forming Machine] The ridge forming machine performs operations such as ridge forming on the soil while traveling in a state where a ridge forming unit having a plurality of disk pairs is grounded on the field surface by being towed by a traveling machine body such as a tractor. In the present embodiment, a ridge forming machine including five ridge forming units will be described as an example.

[0022] The ridging machine 1 shown in FIGS. 1 and 2 is an embodiment of the ridging machine according to the present invention, and includes a main frame 3, a connecting portion 5, and a ridging unit 20.

[0023] In the following description, the "vertical direction", "upper side", and "lower side" in FIG. 2 are defined as the "traveling direction", "front side", and "rear side" of the ridging machine 1, respectively, and the "left - right direction", "left side", and "right side" in FIG. 2 are defined as the "width direction", "left side", and "right side" of the ridging machine 1, respectively.

[0024] The main frame 3 extends in the width direction intersecting the traveling direction of the ridging machine 1, and the connecting portion 5 is fixed thereto. The connecting portion 5 includes a mast 6 connected to a three - point link mechanism provided at the rear of the traveling machine body 90 and a lower hitch pin 7, and is mounted on the rear of the traveling machine body 90 so as to be liftable.

[0025] From the main frame 3, a front - rear frame 31 extends rearward, and a rear frame 32 extending in the width direction is attached to the rear end portion of the front - rear frame 31. A working machine such as a seeder or a fertilizer applicator can be attached to the rear frame 32. When a seeder is attached to the rear frame 32, ridging and seeding operations can be performed. Five ridging units 20 for ridging the soil are mounted on the main frame 3 at predetermined intervals in the width direction.

[0026] [Ridging Unit] The ridging unit 20 has a ridging unit 20A and a ridging unit 20B. The ridging unit 20A is composed of three units arranged on the central side in the width direction, and the ridging unit 20B is composed of two units located to the left and right of the three ridging units 20A.

[0027] Since the ridging unit 20A and the ridging unit 20B have substantially the same configuration, in the following, mainly the ridging unit 20A will be described, and the same parts in the ridging unit 20B will be denoted by the same reference numerals and their description will be omitted.

[0028] The ridge forming unit 20A includes a support frame 21 extending along the traveling direction of the ridger 1, a pair of left and right front row disks 30 supported at the front end portion of the support frame 21, and a pair of left and right rear row disks 40 supported at the rear end portion of the support frame 21. The front row disks 30 and the rear row disks 40 are an example of ridge forming disks that contact the soil.

[0029] In the ridge forming unit 20B shown in FIG. 2, only the front row disks 30 and the rear row disks 40 on the inner side in the width direction among the pair of left and right front row disks 30 and the pair of left and right rear row disks 40 are attached to the support frame 21, but the ridge forming unit 20B can also be configured to attach the pair of left and right front row disks 30 and the pair of left and right rear row disks 40 to the support frame 21.

[0030] The front row disk 30 is formed in a disk shape of a shallow dish with a recessed central portion, and has a concave surface 30a on the recessed side. The rear row disk 40 is formed in a disk shape of a shallow dish with a recessed central portion, and has a concave surface 40a on the recessed side. When the ridging operation is performed by the ridger 1, the concave surface 30a of the front row disk 30 and the concave surface 40a of the rear row disk 40 function as working surfaces for moving the soil.

[0031] The front end portion of the support frame 21 is connected to the main frame 3 and extends rearward from the main frame 3. A connecting frame 22 protruding downward from the support frame 21 is fixed to the front end portion of the support frame 21.

[0032] A pair of swing arms 24 are rotatably attached to the lower end portion of the connecting frame 22 around a vertical axis. The pair of front row disks 30 are respectively rotatably supported by the swing arms 24. The pair of front row disks 30 are arranged in a V-shaped posture in which the interval in the width direction between them is larger at the rear end portion than at the front end portion and larger at the upper end portion than at the lower end portion.

[0033] At the rear end of the support frame 21, a pair of arm support portions 41 extending in the width direction intersecting the traveling direction of the ridger 1 are fixed. The pair of arm support portions 41 are arranged side by side in the front-rear direction. The arm support portion 41 located in the front protrudes rightward from the support frame 21, and the arm support portion 41 located in the rear protrudes leftward from the support frame 21. The arm support portion 41 has a fixing portion 411 formed in a square tube shape and fixed to the support frame 21, and a sliding portion 412 formed in a square tube shape with a smaller diameter than the fixing portion 411 and slidably inserted into the fixing portion 411. By sliding the sliding portion 412 in the width direction, it is possible to adjust the amount of protrusion of the sliding portion 412 from the fixing portion 411.

[0034] One locking hole 411a is formed on each of the upper and lower surfaces of the fixing portion 411, and a plurality of fixing holes 412a are formed on each of the upper and lower surfaces of the sliding portion 412 (see FIG. 3). The fixing holes 412a are arranged at substantially equal intervals along the sliding direction of the sliding portion 412. By aligning the positions of the locking hole 411a and any one of the fixing holes 412a and inserting a pin member through the locking hole 411a and the fixing hole 412a, it is possible to fix the sliding portion 412 to the fixing portion 411 in a state where the amount of protrusion of the sliding portion 412 with respect to the fixing portion 411 is adjusted.

[0035] At the tip of the sliding portion 412 of the arm support portion 41, a disk angle adjustment portion 42 is attached. A disk support rod 43 extending in the vertical direction is rotatably supported by the disk angle adjustment portion 42, and a rear row disk 40 is rotatably supported at the lower end of the disk support rod 43. The disk support rod 43 is supported by the disk angle adjustment portion 42 so that the angle of the rear row disk 40 with respect to the traveling direction of the ridger 1 can be adjusted.

[0036] In the ridge forming unit 20B, the support frame 21 extends rearward from the arm support portion 41, and a gauge wheel support rod 12 extending vertically is attached to the rear end portion of the support frame 21 in a height-adjustable manner. A gauge wheel 11 is supported at the lower end portion of the gauge wheel support rod 12, and the ridge forming height of the front row disk 30 and the rear row disk 40 can be adjusted.

[0037] [Disc Angle Adjusting Portion] As shown in FIG. 3, in the following description, for convenience, the disc angle adjusting portion 42 supported by the front arm support portion 41 is referred to as the disc angle adjusting portion 42A, and the disc angle adjusting portion 42 supported by the rear arm support portion 41 is referred to as the disc angle adjusting portion 42B, and will be described as appropriate.

[0038] As shown in FIGS. 3 and 4, the disc angle adjusting portion 42 includes an adjustment support plate 51, an angle adjustment plate 53, a fixing pin 57, and a spring 58. The adjustment support plate 51 is formed of a plate-like member and is connected to the slide portion 412 of the arm support portion 41. In the disc angle adjusting portion 42A, the left end portion and the front end portion of the adjustment support plate 51 are connected to the slide portion 412, and in the disc angle adjusting portion 42B, the right end portion and the front-rear central portion of the adjustment support plate 51 are connected to the slide portion 412.

[0039] The disc angle adjusting portion 42A and the disc angle adjusting portion 42B are configured in the same manner except that the connection location of the adjustment support plate 51 to the slide portion 412 is different. Therefore, in the following, the disc angle adjusting portion 42A will be described, and the same parts in the disc angle adjusting portion 42B will be denoted by the same reference numerals and their description will be omitted.

[0040] As shown in FIGS. 3 to 5, a first cylindrical member 52 is fixed to the adjustment support plate 51. The first pipe member 52 extends downward from the adjustment support plate 51, and the disc support rod 43 is rotatably inserted therethrough. A plurality of pin insertion holes 511 and a plurality of pin insertion holes 512 are formed in the adjustment support plate 51.

[0041] The pin insertion hole 511 is formed at a location along an arc C1 having a first radius R1 centered on the rotation center X of the disk support rod 43 in the adjustment support plate 51. The pin insertion hole 512 is formed at a location along an arc C2 having a second radius R2 smaller than the first radius R1 centered on the rotation center X of the disk support rod 43 in the adjustment support plate 51. In the circumferential direction of the arcs C1 and C2, the pin insertion hole 511 and the pin insertion hole 512 are alternately arranged.

[0042] As shown in FIGS. 3, 4, and 6, the angle adjustment plate 53 is constituted by a plate-like member. A second cylindrical member 54 is fixed to the angle adjustment plate 53. The second cylindrical member 54 extends upward from the angle adjustment plate 53, and the disk support rod 43 is rotatably inserted therethrough.

[0043] A nut 55 is fixed to the side surface of the second cylindrical member 54. By screwing a bolt 60 into the nut 55 from the outside of the second cylindrical member 54 and pressing the tip of the bolt 60 against the disk support rod 43, the disk support rod 43 can be fixed to the second cylindrical member 54, and the disk support rod 43 and the second cylindrical member 54 can be integrally rotatable. That is, by screwing the bolt 60 into the nut 55, the angle adjustment plate 53 is integrally rotatably supported by the disk support rod 43.

[0044] A retaining pin 59 is horizontally inserted through the upper end portion of the disk support rod 43, and the retaining pin 59 suppresses the disk support rod 43 from coming out downward from the second cylindrical member 54.

[0045] The second cylindrical member 54 is integrally rotatably fixed to the disk support rod 43, and the disk support rod 43 is rotatably inserted through the first cylindrical member 52. Thus, the angle adjustment plate 53 is rotatably supported by the adjustment support plate 51 via the disk support rod 43. Further, the disk support rod 43 is supported by the disk angle adjustment unit 42A so that the angle θ (see FIG. 2) with respect to the traveling direction of the rear row disk 40 can be adjusted.

[0046] In the ridge units 20A and 20B, by releasing the fixing of the disk support rod 43 to the second cylindrical member 54 by the bolt 60 screwed onto the nut 55 and removing the retaining pin 59 from the upper end of the disk support rod 43, the disk support rod 43 can be removed from the disk angle adjustment parts 42A and 42B. Thereby, it is possible to interchange the disk support rod 43 supported by the disk angle adjustment part 42A and the disk support rod 43 supported by the disk angle adjustment part 42B.

[0047] One adjustment hole 531 is formed in the angle adjustment plate 53. The adjustment hole 531 is formed in a long hole shape with the major axis direction along the diameter R3 direction of the arc C3 centered on the rotation center X of the disk support rod 43. The adjustment hole 531 is arranged at a position overlapping the pin insertion hole 511 and the pin insertion hole 512 in the radial direction.

[0048] A cover member 56 that covers the upper part of the adjustment hole 531 is fixed to the angle adjustment plate 53. The cover member 56 is formed in a cylindrical shape with a closed upper surface, and a through hole 561 having substantially the same size and shape as the adjustment hole 531 is formed in the upper surface of the cover member 56.

[0049] The fixing pin 57 is a pin member that extends in the vertical direction and can be inserted into the adjustment hole 531 and the pin insertion holes 511 and 512, and has a main body part 571, a large diameter part 572, an insertion part 573, and a gripping part 574. The main body part 571 is located inside the cover member 56, and the large diameter part 572 is continuously formed at the lower end of the main body part 571. The insertion part 573 protrudes downward from the large diameter part 572.

[0050] The gripping portion 574 is attached to the upper end of the main body portion 571 and is located above the cover member 56. That is, the upper end of the main body portion 571 protrudes above the cover member 56 through the through hole 561, and the gripping portion 574 is attached to the portion of the main body portion 571 that protrudes upward from the cover member 56. The gripping portion 574 is the portion to be gripped when pulling up the fixing pin 57 upward. The fixing pin 57 is configured to be movable radially within the adjustment hole 531 of the angle adjustment plate 53 and within the through hole 561 of the cover member 56.

[0051] The spring 58 is composed of a compression coil spring and is fitted onto the main body portion 571 of the fixing pin 57. The spring 58 is disposed inside the cover member 56. The spring 58 is an example of a biasing member. The upper end of the spring 58 abuts against the upper surface of the cover member 56, the lower end of the spring 58 abuts against the large diameter portion 571, and the fixing pin 57 is biased downward by the spring 58.

[0052] The insertion portion 573 can be inserted into the pin insertion holes 511 and 512 of the adjustment support plate 51, and the fixing pin 57 can hold the state in which the insertion portion 573 is inserted into the pin insertion hole 511 or the pin insertion hole 512 by the biasing force of the spring 58. When the fixing pin 57 is inserted into the pin insertion hole 511 or the pin insertion hole 512, the rotational position of the angle adjustment plate 53 with respect to the adjustment support plate 51 is fixed.

[0053] On the other hand, when the gripping portion 574 is gripped and the fixing pin 57 is pulled upward against the biasing force of the spring 58 from the state where the fixing pin 57 is inserted into the pin insertion holes 511 and 512, the fixing pin 57 comes out of the pin insertion holes 511 and 512, and the angle adjustment plate 53 becomes rotatable with respect to the adjustment support plate 51.

[0054] In the disk angle adjustment portion 42A configured as described above, the adjustment of the angle θ (see FIG. 2) of the rear row disk 40 supported by the disk support rod 43 with respect to the traveling direction can be performed as follows.

[0055] First, with the fixed pin 57 pulled upward and removed from the pin insertion holes 511 and 512, the angle adjustment plate 53 and the disk support rod 43 are rotated with respect to the adjustment support plate 51 so as to adjust the angle θ of the rear row disk 40 supported by the disk support rod 43 with respect to the traveling direction to a predetermined angle. In this case, the angle θ is adjusted so that the circumferential position of the adjustment hole 531 coincides with the circumferential position of any one of the pin insertion holes 511 and 512.

[0056] Also, when pulling up the fixed pin 57, it is only necessary to pull it up to the position where the insertion portion 573 of the fixed pin 57 comes out of the pin insertion holes 511 and 512 (the position indicated by the two-dot chain line in FIG. 4). Even if the lower end of the insertion portion 573 is located within the adjustment hole 531 of the angle adjustment plate 53, the angle adjustment plate 53 can be rotated with respect to the adjustment support plate 51.

[0057] Next, the fixed pin 57 is moved downward and inserted into the adjustment hole 531 and the pin insertion holes 511 and 512 that are aligned with the adjustment hole 531. In this case, the fixed pin 57 can move radially within the adjustment hole 531. When the circumferential position of the adjustment hole 531 coincides with the pin insertion hole 511, the fixed pin 57 is moved to the side away from the rotation center X within the adjustment hole 531 and then inserted into the pin insertion hole 511. Also, when the circumferential position of the adjustment hole 531 coincides with the pin insertion hole 512, the fixed pin 57 is moved to the side approaching the rotation center X within the adjustment hole 531 and then inserted into the pin insertion hole 512.

[0058] In this way, when the fixed pin 57 is inserted into the adjustment hole 531 and the pin insertion holes 511 and 512, since there is only one adjustment hole 531 formed in the angle adjustment plate 53, there is no need to select the adjustment hole 531 through which the fixed pin 57 is inserted, and the adjustment operation of the angle θ of the rear row disk 40 can be easily performed. Also, since the fixed pin 57 can be selectively inserted into either the pin insertion hole 511 or the pin insertion hole 512 by moving it radially within the adjustment hole 531, the adjustment operation of the angle θ of the rear row disk 40 becomes easier.

[0059] Furthermore, by releasing the hand from the gripping portion 574 that was gripping to lift the fixing pin 57, the fixing pin 57 can be automatically moved downward by the biasing force of the spring 58 and inserted into the adjustment hole 531 and the pin insertion holes 511, 512. Thereby, it becomes possible to easily perform the adjustment operation of the angle θ of the rear row disk 40.

[0060] Also, in the disk angle adjustment portion 42A, only one adjustment support plate 51 having pin insertion holes 511, 512 through which the fixing pin 57 is inserted is provided. Therefore, the movement amount D (see FIG. 4) of the fixing pin 57 required when inserting and removing the fixing pin 57 with respect to the pin insertion holes 511, 512 is a small movement amount corresponding to the thickness of the adjustment support plate 51, and the adjustment operation of the angle θ of the rear row disk 40 can be facilitated.

[0061] Also, in the disk angle adjustment portion 42A, since the adjustment hole 531 of the angle adjustment plate 53 is covered by the cover member 56, it is possible to prevent foreign matters such as soil from entering the inside of the adjustment hole 531, and the movement of the fixing pin 57 inserted through the adjustment hole 531 is not hindered, and the adjustment operation of the angle θ of the rear row disk 40 can be performed smoothly.

[0062] Furthermore, since the spring 58 fitted to the main body portion 571 of the fixing pin 57 is disposed inside the cover member 56, it is possible to prevent foreign matters such as soil from adhering to the spring 58, and the biasing operation of the spring 58 on the fixing pin 57 is not hindered. Thereby, the fixing pin 57 can be smoothly inserted into the adjustment hole 531, and the adjustment operation of the angle θ of the rear row disk 40 becomes easy.

[0063] [Operation of ridge forming work by a ridge forming machine] The operation of the ridging machine 1 configured as described above when performing ridging work will be described. As shown in Fig. 2, in the ridging units 20A and 20B when performing ridging work, the front row disks 30 and the rear row disks 40 are arranged in a posture where the front end portion is inclined toward the side closer to the support frame 21 than the rear end portion. Also, the concave surfaces 30a of the front row disks 30 and the concave surfaces 40a of the rear row disks 40 are arranged in a posture facing the outer side in the width direction in the ridging units 20A and 20B, that is, the side opposite to the support frame 21 side in the width direction. When performing ridging work, prior to the work, the height of the gauge wheel 11 is adjusted to adjust the ground penetration depth of the front row disks 30 and the rear row disks 40.

[0064] When the ridging machine 1 set in this way moves forward, the soil is first moved laterally to the left and right by the front row disks 30, and the soil that has been first moved is further moved laterally to the left and right by the rear row disks 40 arranged behind the front row disks 30. In this way, ridges are formed by the soil moved laterally to the left and right by the front row disks 30 and the rear row disks 40.

[0065] When performing ridging work with the ridging machine 1, by adjusting the amount of protrusion of the slide portion 412 in the arm support portion 41 with respect to the fixing portion 411, the position of the rear row disk 40 in the width direction can be appropriately set according to the distance between the ridges to be formed.

[0066] Also, in the ridging machine 1, by adjusting the angle of the front row disk 30 with respect to the traveling direction and the angle θ of the rear row disk 40 with respect to the traveling direction, the amount of soil movement by the front row disk 30 and the rear row disk 40 can be adjusted. For example, when increasing the amount of soil for ridging, the angle of the front row disk 30 with respect to the traveling direction and the angle θ of the rear row disk 40 with respect to the traveling direction are set large. Also, when reducing the amount of soil for ridging, the angle of the front row disk 30 with respect to the traveling direction and the angle θ of the rear row disk 40 with respect to the traveling direction are set small.

Explanation of Reference Numerals

[0067] 1-acre standing machine 3 Main frame 20, 20A, 20B acre standing units 21 Support frame 30 Front row disks 40 Rear row disks 41 Arm support part 42, 42A, 42B Disk angle adjustment parts 43 Disk support rod 51 Adjustment support plate 53 Angle adjustment plate 57 Fixed pin 58 Spring 511, 512 Pin insertion holes 531 Adjustment hole C1, C2, C3 Arcs R1 First radius R2 Second radius R3 Diameter θ Angle

Claims

1. A ridging unit that performs operations on the soil while moving forward, comprising: a support frame extending along the forward direction of the ridging unit; an arm support portion supported by the support frame and extending in the width direction intersecting the forward direction; a ridging disk in contact with the soil; a disk support rod extending in the vertical direction and rotatably supporting the ridging disk; a disk angle adjustment portion attached to the arm support portion and supporting the disk support rod so as to be able to adjust the angle of the ridging disk with respect to the forward direction, wherein the disk angle adjustment portion comprises a single adjustment support plate fixed to the arm support portion, rotatably supporting the disk support rod, and having a pin insertion hole; an angle adjustment plate integrally and rotatably supported by the disk support rod and having one adjustment hole; and a fixing pin insertable into the pin insertion hole and the adjustment hole, wherein a plurality of the pin insertion holes are formed along an arc having a first radius centered on the rotation center of the disk support rod in the adjustment support plate, and a plurality of the pin insertion holes are also formed along an arc having a second radius smaller than the first radius centered on the rotation center of the disk support rod in the adjustment support plate; the adjustment hole is formed in an elongated hole shape having the radial direction of the arc centered on the rotation center of the disk support rod as the major axis direction; the fixing pin is movable in the radial direction within the adjustment hole; and the angle of the ridging disk is adjusted by inserting the fixing pin into the pin insertion hole and the adjustment hole in a state where the disk support rod is rotated so that the angle of the ridging disk becomes a predetermined angle. A ridging unit characterized by the above.

2. The ridging unit according to claim 1, wherein the disk angle adjustment portion has a biasing member that biases the fixing pin in a direction in which the fixing pin is inserted through the pin insertion hole. A ridging unit characterized by the above.

3. A ridging machine comprising a main frame extending in the width direction intersecting the forward direction, and a plurality of the ridging units according to claim 1 or claim 2 mounted on the main frame. ​

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