JP7692209B2 - Ridge forming unit and ridge forming machine - Google Patents

Description

The present invention relates to a ridge forming unit and a ridge forming machine.

As disclosed in Patent Document 1, a disk-type inter-row weeder is known that is configured with a pair of disks arranged in two rows, one behind the other, and is towed by a tractor or a riding management machine to turn the soil between the rows laterally with these disks, thereby performing inter-row weeding work or soil-piling work.

This type of cultivator is equipped with a cultivating unit that has a support frame connected to the main frame, an arm support section that is freely protruding and retracting in the width direction of the support frame, and a disk that is supported by the arm support section via a disk angle adjustment support.

The disk angle adjustment support of the tilling unit has multiple adjustment support plates arranged at a predetermined interval in the vertical direction on the tip side of the arm support part, pin insertion holes on one end side of these adjustment support plates, and a cylindrical member arranged to be rotatable relative to the adjustment support plates. A disk support rod that rotatably supports the disk is inserted into the cylindrical member so that it can be rotated and fixed, and an angle adjustment plate with multiple adjustment holes is arranged above the adjustment support plate.

The disk support rod is fixed to the cylindrical member, and the disk is rotated via the angle adjustment plate, and the angle of the disk is adjusted by inserting the fixing pin through the adjustment hole of the angle adjustment plate and the pin insertion hole formed in the adjustment support plate.

In this way, a weeder with an adjustable angle disk can also be used as a ridge maker, moving the soil laterally with the disk to create ridges.

Patent No. 5331969

In the aforementioned disc angle adjustment support, multiple adjustment holes are formed in the angle adjustment plate, and multiple pin insertion holes are formed in the adjustment support plate. When adjusting the disc angle, it is necessary to select an adjustment hole from the multiple adjustment holes through which the fixed pin is to be inserted, and also to select a pin insertion hole from the multiple pin insertion holes through which the fixed pin is to be inserted, which makes the process of adjusting the disc angle cumbersome.

In addition, multiple adjustment support plates are provided spaced apart in the vertical direction, and the fixing pin is configured to be inserted into a pin insertion hole provided across the upper and lower adjustment support plates, so the amount of movement of the fixing pin when inserting and removing it from the pin insertion hole is large, making the work of adjusting the disk angle cumbersome.

Therefore, the present invention provides a ridge forming unit and ridge forming machine that allows the disk angle to be easily adjusted.

The ridge-making unit and ridge-making machine that solve the above problems have the following features:

That is, the ridge creating unit is a ridge creating unit which works on the soil while moving forward, and comprises a support frame extending along the direction of travel of the ridge creating unit, an arm support section supported by the support frame and extending in a width direction intersecting the direction of travel, a ridge creating disk which comes into contact with the soil, a disk support rod which extends in the vertical direction and rotatably supports the ridge creating disk, and a disk angle adjustment section which is attached to the arm support section and supports the disk support rod so that the angle of the ridge creating disk with respect to the direction of travel can be adjusted, and the disk angle adjustment section comprises a single adjustment support plate which is fixed to the arm support section and rotatably supports the disk support rod and has a pin insertion hole, an angle adjustment plate which is supported integrally with the disk support rod and rotatably supports the disk support rod and has one adjustment hole, and a front The adjustment plate has a fixed pin that can be inserted into the pin insertion hole and the adjustment hole , and 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 on the adjustment support plate, and the pin insertion holes are 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 on the adjustment support plate, the adjustment hole is formed in an elongated hole shape whose long diameter direction is the radial direction of the arc centered on the rotation center of the disk support rod, and the fixed pin is movable in the radial direction within the adjustment hole, and the angle of the ridged disk is adjusted by inserting the fixed pin into the pin insertion hole and the adjustment hole while the disk support rod is rotated so that the angle of the ridged disk is a predetermined angle.

This makes it possible to easily adjust the angle of the ridged disk without having to select an adjustment hole through which the fixed pin is inserted. In addition, the amount of movement of the fixed pin required to insert and remove the fixed pin from the pin insertion hole can be reduced, making it possible to easily adjust the angle of the ridged disk. In addition, by moving the fixed pin radially within the adjustment hole, it is possible to selectively insert the fixed pin into either the pin insertion hole formed at a location along the arc having the first radius or the pin insertion hole formed at a location along the arc having the second radius, making it possible to more easily adjust the angle of the ridged disk.

The disk angle adjustment section also has a biasing member that biases the fixing pin in a direction in which the fixing pin is inserted into the pin insertion hole.

This allows the fixing pin to be automatically moved downward by the biasing force of the biasing member and inserted into the pin insertion hole, making it easy to adjust the angle of the ridge disc.

The ridge forming machine also includes a main frame extending in a width direction intersecting the traveling direction, and a plurality of the ridge forming units according to any one of claims 1 to 3 that are attached to the main frame.

This makes it easy to adjust the angle of the ridge forming disk in the ridge forming machine.

The present invention makes it easy to adjust the angle of the ridge disc.

FIG. FIG. 4 is a plan view showing the arm support portion and the disc angle adjustment portion. FIG. 4 is a side cross-sectional view showing the disk angle adjustment portion. FIG. 4A is a plan view showing the adjustment support plate, and FIG. 4B is a side view showing the adjustment support plate. 4A is a plan view showing the angle adjustment plate, and FIG. 4B is a side view showing the angle adjustment plate.

Next, the embodiment of the present invention will be described with reference to the attached drawings.

[Ridging machine]
The ridge creating machine performs work such as creating ridges in the soil while moving with a ridge creating unit having a plurality of disk pairs grounded on the field surface by being towed by a traveling machine such as a tractor. In this embodiment, a ridge creating machine having five ridge creating units will be described as an example.

The ridge forming machine 1 shown in Figures 1 and 2 is one embodiment of the ridge forming machine according to the present invention, and includes a main frame 3, a connecting portion 5, and a ridge forming unit 20.

In the following description, the "up-down direction," "upper side," and "lower side" in FIG. 2 are defined as the "travel direction," "front side," and "rear side" of the ridge forming 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 ridge forming machine 1, respectively.

The main frame 3 extends in a width direction intersecting with the traveling direction of the ridger 1, and the connecting part 5 is fixed to it. The connecting part 5 is equipped with a mast 6 connected to a three-point link mechanism provided at the rear of the traveling body 90, and a lower hitch pin 7, and is attached to the rear of the traveling body 90 so that it can be raised and lowered.

A front-rear frame 31 extends rearward from the main frame 3, and a rear frame 32 extending in the width direction is attached to the rear end of the front-rear frame 31. A work machine such as a seed sower or a fertilizer applicator can be attached to the rear frame 32. When a seed sower is attached to the rear frame 32, ridge sowing work can be performed. Five ridge-making units 20 that create ridges in the soil are attached to the main frame 3 at a predetermined interval in the width direction.

[Ridge unit]
The ridge forming units 20 include ridge forming units 20A and ridge forming units 20B. The ridge forming units 20A are three units arranged at the center in the width direction, and the ridge forming units 20B are two units located to the left and right of the three ridge forming units 20A.

Ridge creating unit 20A and ridge creating unit 20B have substantially the same configuration, so the following mainly describes ridge creating unit 20A, and the same parts in ridge creating unit 20B are given the same reference numerals and their description is omitted.

The ridge-making unit 20A includes a support frame 21 extending along the traveling direction of the ridge-making machine 1, a pair of left and right front row disks 30 supported on the front end of the support frame 21, and a pair of left and right rear row disks 40 supported on the rear end of the support frame 21. The front row disks 30 and rear row disks 40 are examples of ridge-making disks that come into contact with the soil.

In the ridge forming unit 20B shown in FIG. 2, only the widthwise inner front and rear disks 30 and 40 of the pair of left and right front and rear disks 30 and 40 are attached to the support frame 21, but the ridge forming unit 20B can also be configured with a pair of left and right front and rear disks 30 and 40 attached to the support frame 21.

The front row disk 30 is formed in a shallow dish-like circular plate shape with a recessed center, and has a concave surface 30a on the recessed side. The rear row disk 40 is formed in a shallow dish-like circular plate shape with a recessed center, and has a concave surface 40 on the recessed side. When performing ridge creation work with the ridge creating machine 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 that move the soil.

The support frame 21 has a front end connected to the main frame 3 and extends rearward from the main frame 3. A connecting frame 22 that protrudes downward from the support frame 21 is fixed to the front end of the support frame 21.

A pair of swing arms 24 are attached to the lower end of the connecting frame 22 so as to be rotatable around a vertical axis. The pair of front row disks 30 are each rotatably supported by the swing arms 24. The pair of front row disks 30 are arranged in a V-shaped configuration such that the widthwise spacing between them is larger at the rear end than at the front end, and the upper end is larger than the lower end.

A pair of arm support parts 41 extending in the width direction intersecting the traveling direction of the ridger 1 are fixed to the rear end of the support frame 21. The pair of arm support parts 41 are arranged side by side in the front and rear, with the arm support part 41 located in the front protruding to the right from the support frame 21 and the arm support part 41 located in the rear protruding to the left from the support frame 21. The arm support part 41 has a fixed part 411 formed in a square tube shape and fixed to the support frame 21, and a sliding part 412 formed in a square tube shape with a smaller diameter than the fixed part 411 and slidably inserted into the fixed part 411. By sliding the sliding part 412 in the width direction, it is possible to adjust the amount of protrusion of the sliding part 412 from the fixed part 411.

One locking hole 411a is formed on each of the upper and lower surfaces of the fixed portion 411, and multiple 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 approximately equal intervals along the sliding direction of the sliding portion 412. By aligning the position of the locking hole 411a with 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 with the amount of protrusion of the sliding portion 412 from the fixing portion 411 adjusted.

A disk angle adjustment part 42 is attached to the tip of the slide part 412 of the arm support part 41. A disk support rod 43 extending in the vertical direction is rotatably supported by the disk angle adjustment part 42, and the 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 part 42 so that the angle of the rear row disk 40 relative to the traveling direction of the ridger 1 can be adjusted.

In the ridge-making unit 20B, the support frame 21 extends rearward beyond the arm support portion 41, and a gauge wheel support rod 12 extending in the vertical direction is attached to the rear end of the support frame 21 so that its height can be adjusted. A gauge wheel 11 is supported on the lower end of the gauge wheel support rod 12, making it possible to adjust the ridge-making height of the front row disks 30 and the rear row disks 40.

[Disc angle adjustment section]
As shown in FIG. 3, in the following description, for convenience, the disk angle adjustment part 42 supported by the front arm support part 41 will be referred to as disk angle adjustment part 42A, and the disk angle adjustment part 42 supported by the rear arm support part 41 will be referred to as disk angle adjustment part 42B, as appropriate.

As shown in Figures 3 and 4, the disk angle adjustment unit 42 has an adjustment support plate 51, an angle adjustment plate 53, a fixing pin 57, and a spring 58. The adjustment support plate 51 is made of a plate-like member and is connected to the slide portion 412 of the arm support unit 41. In the disk angle adjustment unit 42A, the left end and front end of the adjustment support plate 51 are connected to the slide portion 412, and in the disk angle adjustment unit 42B, the right end and front-rear center portion of the adjustment support plate 51 are connected to the slide portion 412.

Since disk angle adjustment unit 42A and disk angle adjustment unit 42B are configured in the same way except for the connection point of adjustment support plate 51 to slide portion 412, the following description will focus on disk angle adjustment unit 42A, and the same parts in disk angle adjustment unit 42B will be given the same reference numerals and their description will be omitted.

As shown in Figures 3 to 5, a first cylindrical member 52 is fixed to the adjustment support plate 51. The first tube member 52 extends downward from the adjustment support plate 51, and the disk support rod 43 is rotatably inserted through it. The adjustment support plate 51 is formed with a number of pin insertion holes 511 and a number of pin insertion holes 512.

The pin insertion holes 511 are formed at locations 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 holes 512 are formed at locations 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. The pin insertion holes 511 and the pin insertion holes 512 are arranged alternately in the circumferential direction of the arcs C1 and C2.

As shown in Figures 3, 4, and 6, the angle adjustment plate 53 is composed of a plate-shaped 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 inserted rotatably through it.

A nut 55 is fixed to the side of the second cylindrical member 54. A bolt 60 is screwed into the nut 55 from the outside of the second cylindrical member 54, and the tip of the bolt 60 is pressed against the disk support rod 43, thereby fixing the disk support rod 43 to the second cylindrical member 54 and allowing the disk support rod 43 and the second cylindrical member 54 to rotate integrally. In other words, by screwing the bolt 60 into the nut 55, the angle adjustment plate 53 is supported so as to be able to rotate integrally with the disk support rod 43.

A retaining pin 59 is inserted horizontally into the upper end of the disk support rod 43, and the retaining pin 59 prevents the disk support rod 43 from slipping out downward from the second cylindrical member 54.

The second cylindrical member 54 is fixed to the disk support rod 43 so as to be integrally rotatable, and the disk support rod 43 is rotatably inserted into the first cylindrical member 52, so that the angle adjustment plate 53 is rotatably supported by the adjustment support plate 51 via the disk support rod 43. In addition, the disk support rod 43 is supported by the disk angle adjustment part 42A so that the angle θ (see FIG. 2) with respect to the traveling direction of the rear row disk 40 can be adjusted.

In the ridge forming units 20A and 20B, the disk support rod 43 can be removed from the disk angle adjustment units 42A and 42B by releasing the fixation of the disk support rod 43 to the second cylindrical member 54 by the bolt 60 threaded into the nut 55 and removing the retaining pin 59 from the upper end of the disk support rod 43. This makes it possible to switch the disk support rod 43 supported by the disk angle adjustment unit 42A with the disk support rod 43 supported by the disk angle adjustment unit 42B.

The angle adjustment plate 53 is formed with one adjustment hole 531. The adjustment hole 531 is formed in an elongated hole shape with the long diameter direction being the direction of radius R3 of the arc C3 centered on the rotation center X of the disc support rod 43. The adjustment hole 531 is disposed at a position overlapping with the pin insertion holes 511 and 512 in the radial direction.

A cover member 56 is fixed to the angle adjustment plate 53, covering the upper part of the adjustment hole 531. The cover member 56 is formed in a cylindrical shape with a closed top surface, and a through hole 561 of approximately the same size and shape as the adjustment hole 531 is formed in the top surface of the cover member 56.

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, 512, and has a main body portion 571, a large diameter portion 572, an insertion portion 573, and a grip portion 574. The main body portion 571 is located inside the cover member 56, and the large diameter portion 572 is formed continuously with the lower end of the main body portion 571. The insertion portion 573 protrudes downward from the large diameter portion 572.

The gripping portion 574 is attached to the upper end of the main body portion 571 and is located above the cover member 56. In other words, 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 that is gripped when the fixing pin 57 is pulled 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.

The spring 58 is made of a compression coil spring and is fitted into the main body 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, and 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.

The insertion portion 573 can be inserted into the pin insertion hole 511 and the pin insertion hole 512 of the adjustment support plate 51, and the fixing pin 57 can maintain 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 relative to the adjustment support plate 51 is fixed.

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

In the disk angle adjustment section 42A configured in this manner, the angle θ (see FIG. 2) of the rear row disk 40 supported by the disk support rod 43 relative to the traveling direction can be adjusted as follows.

First, the fixing pin 57 is pulled upward and removed from the pin insertion holes 511 and 512, and the angle adjustment plate 53 and the disk support rod 43 are rotated relative to the adjustment support plate 51 to adjust the angle θ of the rear row disk 40 supported by the disk support rod 43 relative 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 matches the circumferential position of one of the pin insertion holes 511 and 512.

When pulling up the fixing pin 57, it is sufficient to pull it up to a position where the insertion portion 573 of the fixing pin 57 comes out of the pin insertion holes 511 and 512 (the position shown by the two-dot chain line in Figure 4), and even if the lower end of the insertion portion 573 is positioned within the adjustment hole 531 of the angle adjustment plate 53, the angle adjustment plate 53 can be rotated relative to the adjustment support plate 51.

Then, 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 is movable radially within the adjustment hole 531, and when the circumferential position of the adjustment hole 531 is aligned with the pin insertion hole 511, the fixed pin 57 is moved away from the rotation center X within the adjustment hole 531 and then inserted into the pin insertion hole 511. When the circumferential position of the adjustment hole 531 is aligned with the pin insertion hole 512, the fixed pin 57 is moved toward the rotation center X within the adjustment hole 531 and then inserted into the pin insertion hole 512.

In this way, when the fixing 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 fixing pin 57 is inserted, and the adjustment work of the angle θ of the rear row disk 40 can be easily performed. In addition, the fixing 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, making the adjustment work of the angle θ of the rear row disk 40 easier.

Furthermore, by releasing the gripping portion 574 that was gripped in order to pull up 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 and 512. This makes it easy to adjust the angle θ of the rear row disc 40.

In addition, in the disk angle adjustment section 42A, only one adjustment support plate 51 having pin insertion holes 511, 512 through which the fixed pin 57 is inserted is provided. Therefore, the movement amount D (see FIG. 4) of the fixed pin 57 required when inserting or removing the fixed pin 57 into or from the pin insertion holes 511, 512 is a small movement amount corresponding to the thickness of the adjustment support plate 51, making it easy to adjust the angle θ of the rear disk 40.

In addition, in the disk angle adjustment section 42A, the adjustment hole 531 of the angle adjustment plate 53 is covered by the cover member 56, which prevents foreign matter such as soil from entering the adjustment hole 531. This prevents the movement of the fixing pin 57 inserted into the adjustment hole 531 from being impeded, allowing the angle θ of the rear disk 40 to be adjusted smoothly.

Furthermore, the spring 58 fitted into the main body 571 of the fixing pin 57 is disposed inside the cover member 56, which prevents dirt and other foreign matter from adhering to the spring 58 and does not impede the spring 58's biasing action against the fixing pin 57. This allows the fixing pin 57 to be smoothly inserted into the adjustment hole 531, facilitating the adjustment of the angle θ of the rear disk 40.

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

When the ridge forming machine 1 configured in this way moves forward, the soil is moved to the left and right sides primarily by the front row discs 30, and the soil that has been moved primarily is further moved to the left and right sides by the rear row discs 40 arranged behind the front row discs 30. In this way, ridges are formed by the soil moved to the left and right sides by the front row discs 30 and the rear row discs 40.

When performing ridge forming operations using the ridge forming machine 1, the widthwise position of the rear row disk 40 can be appropriately set according to the distance between the ridges to be formed by adjusting the amount of protrusion of the slide portion 412 of the arm support portion 41 relative to the fixed portion 411.

In addition, in the ridge forming machine 1, the amount of soil moved by the front row discs 30 and the rear row discs 40 can be adjusted by adjusting the angle of the front row discs 30 with respect to the traveling direction and the angle θ of the rear row discs 40 with respect to the traveling direction. For example, to increase the amount of soil to be ridged, the angle of the front row discs 30 with respect to the traveling direction and the angle θ of the rear row discs 40 with respect to the traveling direction are set large. On the other hand, to decrease the amount of soil to be ridged, the angle of the front row discs 30 with respect to the traveling direction and the angle θ of the rear row discs 40 with respect to the traveling direction are set small.

REFERENCE SIGNS LIST 1 Ridge forming machine 3 Main frame 20, 20A, 20B Ridge forming unit 21 Support frame 30 Front row disc 40 Rear row disc 41 Arm support section 42, 42A, 42B Disc angle adjustment section 43 Disc support rod 51 Adjustment support plate 53 Angle adjustment plate 57 Fixing pin 58 Spring 511, 512 Pin insertion hole 531 Adjustment hole C1, C2, C3 Circular arc R1 First radius R2 Second radius R3 Diameter θ Angle

Claims (3)

A furrow making unit that works on the soil as it moves,
a support frame extending along a direction in which the ridge forming unit moves;
an arm support portion supported by a support frame and extending in a width direction intersecting the traveling direction;
a ridge disk that is in contact with the soil;
a disk support rod extending in the vertical direction and rotatably supporting the ridge disk;
a disk angle adjustment unit attached to the arm support unit and supporting the disk support rod so as to adjust an angle of the ridged disk with respect to the traveling direction,
The disk angle adjustment unit is
an adjustment support plate that is fixed to the arm support portion, that rotatably supports the disk support rod, and that has a pin insertion hole;
an angle adjustment plate supported integrally and rotatably on the disk support rod and having one adjustment hole;
A fixing pin that can be inserted into the pin insertion hole and the adjustment hole,
the pin insertion holes are formed in a plurality of positions along an arc having a first radius centered on the rotation center of the disk support rod in the adjustment support plate, and the pin insertion holes are formed in a plurality of positions 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 whose major axis is a radial direction of an arc centered on the rotation center of the disk support rod,
The fixing pin is movable in the adjustment hole in the radial direction,
the angle of the ribbed disk is adjusted by inserting the fixing pin into the pin insertion hole and the adjustment hole in a state in which the disk support rod is rotated so that the angle of the ribbed disk is a predetermined angle.
A ridge forming unit characterized by: the disk angle adjustment portion has a biasing member that biases the fixing pin in a direction in which the fixing pin is inserted into the pin insertion hole.
2. The ridge forming unit according to claim 1 . a main frame extending in a width direction intersecting the traveling direction;
A ridge forming machine comprising: a plurality of the ridge forming units according to claim 1 or 2 mounted on the main frame.

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