JP7352282B2 - Peeling cutting structure - Google Patents

Description

The present invention relates to an exfoliation cutting structure that enables uniform and horizontal exfoliation cutting at any depth.

Conventionally, in order to exfoliate and cut surfaces such as road surfaces or walls of structures, for example, Patent Documents 1 to 4 disclose a first boom that can be tilted and raised freely, and a second boom that can be bent and extended with respect to the tip of the first boom. A peeling cutting machine has been proposed in which an arm consisting of two booms is movably mounted on a self-propelled vehicle for civil engineering work, and a rotating drum with a cutting protrusion called a bit is attached to the tip of the second boom. ing.

Patent Document 1 (Utility Model Application Publication No. 4-108637) discloses that the tip of the second boom is designed to increase the degree of freedom in swinging the rotating drum so that the rotating drum can be displaced in any direction. A main bracket is attached so as to be freely movable up and down on a horizontal shaft suspended perpendicularly to the longitudinal direction of the main bracket, and a sub-bracket is attached so as to be rotatable left and right on a vertical shaft provided vertically at the tip of the main bracket. A configuration with a rotating excavation drum is shown.

Patent Document 2 (Japanese Unexamined Patent Publication No. 7-286307) discloses that a plurality of strips are provided on the outer periphery for the purpose of making the depth (thickness) of peeling constant and protecting machines and instruments during work. It consists of a rotating drum provided with a bit, a drum bracket that supports the rotating drum and a hydraulic motor that drives the rotating drum, and a protective cover provided on the side of the rotating drum, and the drum bracket supports the rotating drum. and a cap-like part that encloses the hydraulic motor from information, and can be attached to the arm, and a configuration is shown in which the protective cover covers at least the side of the drum bracket on which the rotating drum is attached. There is.

Patent Document 3 (Japanese Unexamined Patent Publication No. 10-72842) uses Patent Document 1 as a conventional example, and describes a method that has good workability and can be miniaturized by easily cutting down the wall surface to a predetermined depth and flush. For the purpose of making it possible, the proximal end of the first bracket is attached to the tip of the second boom of an arm consisting of a first boom that can be tilted and raised freely and a second boom that can be bent and extended with respect to the tip of the first boom. is rotatably supported in the vertical direction by a horizontal shaft, the proximal end of a second bracket is supported rotatably in the left and right directions on the tip of the first bracket by a vertical shaft, and a second bra housing is provided. In a cutting device equipped with a rotary cutting drum with a plurality of bits protruding from the surface thereof, the rotary cutting drum is located along at least one of the left and right sides of the rotary cutting drum and protrudes toward the cutting surface side of the rotary cutting drum. A configuration is shown in which a level gauge is provided to regulate the level of the cutting depth, and the level gauge is attached to the second bracket so as to be adjustable forward and backward relative to the tip of the bit of the rotary cutting drum.

Patent Document 4 (Japanese Unexamined Patent Application Publication No. 2014-66071) discloses that, using Patent Document 2 as a conventional example, the outer circumferential portion of the rotating drum has a plurality of A configuration is shown in which the cutting edge directions of the bits are arranged in a staggered manner with the cutting edges of the bits tilted at a predetermined angle alternately on the left and right in the width direction of the rotating drum.

By the way, in the peeling cutting machines as shown in Patent Documents 1 to 4, if the drum does not contact the peeling cutting surface in parallel, the peeling cutting surface naturally becomes a surface inclined along the inclination of the drum. In addition, when performing exfoliation cutting to a predetermined depth from the surface, if the drum is applied strongly to the exfoliation cutting surface, the exfoliation cutting will occur more than necessary, and if the drum is applied weakly to the exfoliation cutting surface, exfoliation cutting will occur less than necessary. Among the above-mentioned Patent Documents 1 to 4, remedies for these problems are proposed in Patent Document 3.

However, although Patent Document 3 has a configuration in which a level gauge is provided and the exfoliation cutting depth is kept constant by adjusting the amount of advance and retreat of the level gauge from the tip of the drum (bit), this premise is ” has a flat surface. In other words, if the surface before peel cutting is not flat and has slopes, partial bulges, or sinking surfaces, peel cutting will follow suit, and the surface after peel cutting will also be peel cut. This results in a state that follows the previous surface shape.

Therefore, in Patent Document 3, in order to form a reference surface in advance, the corners of the peripheral surface and end surface of the drum are pressed against the peeling cutting surface and peeling is cut to a predetermined depth in advance, and this depth is used as a reference. However, the formation of the reference plane by the corner cannot be performed strictly, and the work is difficult and requires skill, so as a result, it is difficult to perform flat peeling cutting to the desired depth. There was such a problem.

Utility Model Publication No. 4-108637 Japanese Patent Application Publication No. 7-286307 Japanese Patent Application Publication No. 10-72842 Japanese Patent Application Publication No. 2014-66071

The problem to be solved by the present invention is that with conventional peel cutting machines, it is still difficult to perform horizontal (flat) peel cutting while keeping the peel cutting depth constant.

The exfoliation cutting structure of the present invention is formed in the diametrical direction of the rotary drum on at least one end side of both end surfaces of the rotating shaft of the rotary drum in a bracket that pivotally supports a rotary drum provided with a plurality of exfoliation cutting bits. , a guide portion having a reference surface that does not follow the settling surface , and edge surfaces formed at a predetermined angle on both sides of the rotating drum in the circumferential direction with the reference surface in between. .

In the present invention, once a flat and horizontal reference surface is formed using the reference surface of the guide part, peeling cutting is performed by a predetermined depth using the edge surface with respect to this reference surface, so that the peeling cutting depth is It is possible to achieve a flat finish while keeping the surface constant.

(a) is a schematic configuration diagram showing the exfoliation cutting structure of the present invention, and (b) is a perspective view showing only the confirmation part of the exfoliation cutting structure of the present invention. FIG. 2 is a view taken along arrow A in FIG. 1 showing the exfoliation cutting structure of the present invention. (a) to (c) are diagrams showing the state of peeling cutting by one method using the peeling cutting structure of the present invention, and (d) and (e) are diagrams showing the status of the confirmation part at the time of (a) and (c). , is. (a) to (c) are diagrams showing peeling cutting conditions by other methods using the peeling cutting structure of the present invention, and (d) and (e) show the status of the confirmation part in (a) and (c). Figure. (a) is a diagram showing a situation in which the ground surface is peeled and cut by a peeling cutting machine equipped with the peeling cutting structure of the present invention, (b) is a diagram showing the peeling cutting structure of the present invention in (a), (c ) is a diagram showing only the confirmation part in case (a). (a) is a diagram showing a situation in which a wall surface is peeled and cut by a peeling cutting machine equipped with the peeling cutting structure of the present invention, (b) is a diagram showing the peeling cutting structure of the present invention in the case of (a), (c) This is a diagram showing only the confirmation part in the case of (a).

The present invention aims to perform flat exfoliation cutting while keeping the exfoliation cutting depth constant, in a bracket that pivotally supports a rotating drum provided with a plurality of bits for exfoliation cutting. a reference surface formed in the diametrical direction of the rotating drum on one end side and that does not follow the settling surface ; and edge surfaces formed at a predetermined angle on both sides of the rotating drum in the circumferential direction with this reference surface in between; This was achieved by creating a peel-off cutting structure that includes a guide section with .

Further, the present invention may include a swinging mechanism that swings the bracket together in the direction of both ends of the rotating shaft of the rotating drum. The present invention includes a swinging mechanism that swings the rotating drum so that the corners of the peripheral surface and end surface of the rotating drum come into contact with the peeling cutting start surface, and after forming the peeling cutting start reference depth, The rotating drum is returned to a horizontal position by the swinging mechanism, and exfoliation cutting can be performed using the entire circumferential surface of the rotating drum.

Furthermore, in the present invention, the bracket may include an advancing/retracting mechanism for moving the guide portion back and forth in a diametrical direction of the rotating drum. In the present invention, by having the advancing/retracting mechanism, the peeling cutting depth can be freely determined by the guide section.

Moreover, in the above, the present invention may include a confirmation part for confirming that at least the edge surface of the guide part is in contact with the exfoliation cutting surface at a predetermined angle and at a predetermined depth. By having the confirmation part, the present invention enables exfoliation cutting to be performed while confirming that it is not only horizontal but also at a certain desired angle.

Furthermore, in the present invention, in the above, the rotating drum may have a peak or valley formed in the center in the axial direction, or may have a continuous peak and valley formed in the axial direction. In the present invention, a rotary drum having a special peripheral surface shape can be used, and by employing a rotary drum having such a shape, it is possible to form a peeling cutting surface suitable for the purpose.

Hereinafter, specific examples of the exfoliation cutting structure of the present invention will be described with reference to the drawings. The exfoliation cutting structure in this example will be explained in a form adopted in a exfoliation cutting machine 11 of a self-propelled vehicle for civil engineering work as shown in FIGS. 5 and 6, for example.

The peeling and cutting machine 11 includes an elevating boom 13 whose base end is pivotally supported on a turntable 12 of a self-propelled vehicle such as a crawler, and a bending boom 14 which is pivotally supported at the tip of the elevating boom 13. The exfoliation cutting structure of the present invention in this embodiment will be described with reference to the embodiment in which it is attached to the tip of the flexible boom 14 of the exfoliation cutting machine 11.

In this example, the exfoliation cutting structure is attached to the bending boom 14 by, for example, the first bracket 1, the second bracket 2, the third bracket 3, and the fourth bracket 4.

The first bracket 1 is provided at the tip of the flexible boom 14, extending over both side surfaces perpendicular to the longitudinal direction of the flexible boom 14 and a second bracket 2, which will be described later. The pair of first brackets 1, 1 are provided with bearing portions 1A, 1A, respectively, which rotatably support a horizontal shaft 14A extending between them with the flexible boom 14 in between.

Moreover, a horizontal shaft 1B is spanned between the pair of first brackets 1, 1, further toward the tip end side of the bending boom 14 than the horizontal shaft 14A. This horizontal shaft 14B is pivotally supported by bearing portions 1B, 1B formed on the first brackets 1, 1, respectively.

The distal end of one link member 15a, 15a of a pair of one-section link members 15, 15 is rotatably provided on the horizontal axis 14B. The other ends of the one links 15a, 15a are rotatably connected to the tips of the other link members 15b, 15b at movable points 15c, 15c. The other ends of the other link members 15b, 15b are rotatably provided on both sides of the bending/extending boom 14 (planes perpendicular to the bending/extending movable surface of the bending/extending boom 14).

A movable rod 15d is pivotally supported between movable points 15c, 15c of the link member 15, and the tip of a rod R of a cylinder device S provided on the bending boom 14 is provided on the movable rod 15d.

A pair of second brackets 2, 2 are provided on the side of the first brackets 1, 1 opposite to the connecting side of the flexible boom 14 (hereinafter referred to as the tip) so as to straddle the interval between the first brackets 1, 1. There is. The second brackets 2, 2 face the first brackets 1, 1 perpendicularly to the facing direction, and bearing portions 2A, 2A are formed at the same opposing positions.

In the space where the second brackets 2, 2 face each other, a hydraulic motor M, for example, is provided in this example, which is received by the bearing parts 2A, 2A. This hydraulic motor M is fixed to shaft holes 2a, 2a of connecting members 2B, 2B provided further outside the second brackets 2, 2 and parallel to the second brackets 2, 2. In the present invention, the hydraulic motor M functions as a swinging mechanism, and swings the rotary drum 5 toward both ends of the rotating shaft by rotating the third brackets 3, 3.

The third brackets 3, 3 connect a fourth bracket 4, which will be described later, at their front ends to the connecting members 2B, 2B at their rear ends, thereby coupling them together. In this example, a damper 3A is provided in a space between the second brackets 2, 2 and the fourth bracket 4 in the third brackets 3, 3. This damper 3A is provided to attenuate the impact received from the direction of the tip (that is, the rotating drum 5).

The fourth bracket 4 is connected to the second brackets 2, 2 by the third brackets 3, 3, as described above. When viewed from the circumferential direction of the rotating drum 5 shown in FIG. 2, the fourth bracket 4 has a vertical side 4A located on the right side in the figure, and is located above the vertical side 4A and is perpendicular to the vertical side 4A. It has a hook shape consisting of continuous horizontal sides 4B.

The horizontal side portion 4B of the fourth bracket 4 is provided with the damper 3A on its upper surface. Further, the horizontal side portion 4B is formed with connecting surfaces 4a, 4a for connecting with the connecting members 3b, 3b of the third brackets 3, 3 at least in parallel with the third brackets 3, 3.

The fourth bracket 4 is provided with the exfoliation cutting structure of the present invention. In the exfoliation cutting structure, a rotary drum 5 is pivotally supported on a fourth bracket 4, and a guide portion 6 is provided on at least one end surface of both end surfaces of the shaft of the rotary drum 5 in this fourth bracket 4. , a structure having a reference surface 6A formed in the diametrical direction of the rotating drum 5, and edge surfaces 6B, 6B formed at a predetermined angle on both sides of the rotating drum 5 in the circumferential direction with the reference surface 6A in between. It has become. The details will be explained below.

A rotary drum 5 is located inside the vertical side portion 4A of the fourth bracket 4 (on the left side in FIG. 2), and a rotation shaft (not shown) of the rotary drum 5 is supported in a cantilever manner. The rotating drum 5 is, for example, cylindrical in this example, and has a plurality of bits B on its outer circumferential surface, and a hydraulic motor (not shown) is provided on its inner circumference, and this rotating shaft is connected to the vertical side 4A. Cantilevered.

Further, the vertical side portion 4A is provided with a guide portion 6 at the tip on the outside thereof. This guide portion 6 has three surfaces at its tip. That is, the guide portion 6 has a reference surface 6A formed in the diametrical direction of the rotating drum 5, and edge surfaces 6B, 6B formed on both sides in the circumferential direction at the same angle across the reference surface 6A. .

Further, on the outer surface of the guide portion 6 that is perpendicular to the reference surface 6A and the edge surfaces 6B, 6B, a long hole 6a and a long hole 6b, 6b in the direction from the tip to the rear end are formed at the center and on both sides thereof. Pins P are inserted into these long holes 6a, 6b, and 6b.

Furthermore, in this example, two hydraulic cylinder devices S1 and S2 are provided on the outside of the vertical side portion 4A of the fourth bracket 4, and the rods R1 and R2 of the hydraulic cylinder devices S1 and S2 (advancing/retracting mechanism) are They are each connected to an end portion of the guide portion 6 on the opposite side from the tip. By moving the rods R1 and R2 of the hydraulic cylinder devices S1 and S2 forward and backward by the same amount or by mutually different amounts, it is possible to vary the depth and finish of exfoliation cutting.

Further, in this example, the vertical side portion 4A of the fourth bracket 4 is present at one end in the axial direction of the rotary drum 5, but the vertical side portion 4A is provided at both ends in the axial direction, and the guide portion 6 By making the same configuration as above at both ends in the axial direction, it becomes easier to ensure the horizontality (flatness) of the exfoliated cutting surface.

Further, for example, the exfoliation cutting structure of this example includes a confirmation part that confirms that the exfoliation cutting surface is in contact with the exfoliation cutting surface at a predetermined angle and at a predetermined depth. An example of the confirmation section will be described below. One of the band-shaped gauge bodies 7 is provided across the space between the opposing surfaces of the first brackets 1, 1 on the cockpit side, and the other gauge body 7 is also connected to the first bracket at a predetermined interval in the distal direction. 1,1. The gauge body 7 is color-coded in parallel at intervals of, for example, 5 cm, and a longitudinal center line is drawn at the center in the width direction.

Further, an index weight 7A having an annular shape that is long in the width direction of the gauge body 7 is attached to the gauge body 7. The lower side of the index weight 7A shown in the figure, that is, the side located outside the bend between one side and the other of the gauge body 7, is provided with a gentle downward slope from both ends in the width direction toward the center. Further, a horizontal weight 7B is attached to the index weight 7A on the side located outside the bend between one side and the other of the gauge body 7.

In this example, the gauge body 7, the index weight 7A, and the horizontal weight 7B are introduced as confirmation parts, but instead of the above, for example, both ends of the reference surface 6A of the guide part 6 adjacent to the edge surface 6B of the reference surface 6A (that is, the reference (Both ends of the surface 6A), an end of the reference surface 6A on the edge surface 6B adjacent to the edge surface 6B, and an end not adjacent to the reference surface 6A (that is, both ends of the edge surfaces 6B, 6B) A sensor may be provided to detect, for example, the distance between the part and the peeled cut surface, or the reaction force from the peeled cut surface in contact.

By doing this, unlike the operator's visual work using the gauge body 7, electrical control via the sensor becomes possible, so that during the series of work, the reference surface 6A and the edge surface 6B are relative to the exfoliated cutting surface. Control can be performed based on the detection result as to whether contact is made at a desired angle and at a predetermined depth. If a sensor is provided, in this example, it is also necessary to control the advance and retreat of the rods R1 and R2 of the cylinder devices S1 and S2, so that detailed settings such as the amount of protrusion of the bit B (peeling cutting depth) can be made reliably and This can be done easily.

The exfoliation cutting machine 11 having the above configuration performs exfoliation cutting on, for example, the ground surface as shown in FIG. 5, or exfoliation cutting on, for example, a wall surface as shown in FIG. 6. At this time, the peeling cutting structure of the present invention in this embodiment in the peeling cutting machine 11 operates as follows. In the following description, the ground surface in FIG. 5 before peel cutting and the wall surface in FIG. 6 will be collectively referred to as the "surface", and the surface after peel cutting will be referred to as the "peeling cut surface".

In FIGS. 3(a) to 3(c), the exfoliation cutting structure of the present invention will be described in which the surface is horizontally exfoliated and cut to a depth of, for example, 5 cm using only the guide portion 6. First, as an initial setting, the reference surface 6A of the guide section 6 is set to be at the same position as the protruding position of the tip of the bit B of the rotating drum 5, and the bit B is set so that it protrudes by 5 cm from the edge surface 6B. There is. In this example, setting of the guide portion 6 to the bit B of the rotary drum 5 is performed by, for example, operating the cylinder devices S1 and S2.

In FIG. 3A, the peeling cutter 11 is operated so that both end portions of the reference surface 6A are in contact with the surface, and in this example, the rotating drum 5 is horizontal. Specifically, the reference surface 6A of the guide part 6 in the exfoliation cutting structure is pressed perpendicularly to, for example, the surface before exfoliation cutting. Note that if the entire area of the reference surface 6A does not contact, the ground surface may be peeled and cut by the rotating drum 5.

Subsequently, as shown in FIG. 3(b), the peeling cutter 11 is operated to move the contact point between the rotary drum 5 and the surface, in this case, for example, toward the operator's seat. Specifically, while rotating the rotary drum 5, peeling cutting is performed while tilting the guide portion 6 until the entire area of the edge surface 6B from the reference surface 6A, which had been in contact with the ground surface, comes into contact.

Then, as shown in FIG. 3(c), the rotating drum 5 is rotated so that the entire edge surface 6B of the guide part 6 is in contact with the peeling cutting surface and the entire edge surface 6B is not separated from the ground surface. While cutting, the peeling cutter 11 is moved forward (to the side opposite to the driver's seat side). This state is shown in FIGS. 5(a), (b), and FIGS. 6(a) and (b).

In this way, the exfoliation cutting structure of the present invention can accurately and horizontally grasp the reference position (0 level) of the depth of the exfoliation cutting surface on the reference surface 6A, and from there, tilting toward the edge surface 6B. By proceeding with the work so that the entire area of the edge surface 6B is in contact with the exfoliation cutting surface, exfoliation cutting can be performed while maintaining its depth (in this example, -5 cm level) and horizontality.

Here, in the above, if the guide portions 6 are provided at both ends of the rotary drum 5 in the axial direction, the horizontality of the rotation axis of the rotary drum 5 (that is, the surface and the exfoliation cutting surface) becomes more reliable. Furthermore, although the example above shows peeling cutting using only the guide part 6, if a gauge body 7 is adopted as shown in FIGS. 3(c) and 3(d), for example, the reference surface 6A and the edge The work can be performed while visually confirming the contact status between the surface 6B, the surface, and the exfoliated cutting surface.

When employing the gauge body 7, when the situation shown in FIG. When the horizontal weight 7B of the gauge body 7 is located at the center, as shown in FIG. 3(c). In other words, horizontality can be confirmed when the center line drawn at the center of the gauge body 7 in the width direction and the horizontal weight 7B are at the same position in the width direction. At this time, the position of the index weight 7A in the cage body 7 is also confirmed.

As shown in FIG. 3(c), when the entire area of the edge surface 6B is in contact with the exfoliation cutting surface, the inclination of the exfoliation cutting structure causes the gauge between the first bracket 1 and the index weight 7A to be centered around the index weight 7A. The relationship between the length of the hanging region of the body 7 in the vertical (vertical) direction and the region between the third bracket 3 and the index weight 7A changes. In other words, as shown in FIG. 3(e), the vertical region becomes shorter than when the reference plane 6A is in contact with the other, and this can be confirmed from the operator's seat using the indicator weight 7A in the gauge body 7. . This state is shown in FIG. 5(c) and FIG. 6(c).

Next, for example, if a reference surface exists in advance and you want to perform exfoliation cutting in line with this, if you have a swing mechanism (hydraulic motor M), you can easily perform exfoliation cutting in alignment with that reference plane. It becomes possible. In this case, to carry out the method shown in FIG. 3, the reference surface 6A of the guide section 6 is positioned on the surface that will become the reference surface in the state of FIG. After the surface 6A comes into contact with the pre-existing reference surface, the peeling cutter 11 may be advanced to perform the work while keeping the reference surface 6A in contact with the pre-existing reference surface.

In the case of the method shown in FIG. 4, the settings of the initial setting guide section 6 may be the same as those described above using FIG. First, as shown in FIG. 4(a), the entire structure from the second bracket 2 onwards is swung by the hydraulic motor M to bring it into contact with a surface based on the reference surface 6A. At this time, the rotary drum 5 is in an inclined state so that the guide portion 6 side in the axial direction is directed downward.

Next, as shown in FIGS. 4(b) and 4(c), the hydraulic motor M operates the rotary drum 5 while keeping the reference surface 6A in contact with the reference surface, and gradually peels and cuts the surface. Return the rotating drum 5 to the horizontal position. When the rotating drum 5 returns to the horizontal position, it moves forward with the reference surface 6A kept in contact with it to proceed with the peeling and cutting operation. By doing this, as described above, peel cutting can be performed while maintaining the depth and levelness.

Further, in the case of FIG. 4 as well, by providing the gauge body 7, it is possible to perform the measurement while checking the status of the rotating drum 5. When the guide part 5 side of the rotating shaft of the rotary drum 5 is tilted downward as shown in FIG. 4(a), the gauge body 7 is also tilted as shown in FIG. 4(d). The horizontal weight 7B has moved to a position biased toward the guide portion 6 side.

After that, when the state reaches FIG. 4(c) via FIG. 4(b), the rotating drum 5 is returned to the horizontal position, so that the gauge body 7 is also returned to the horizontal position. That is, as shown in FIG. 4(e), since the horizontal weight 7B also returns to the center of the gauge body 7 in the width direction, it is easy to check the horizontality of the rotating drum 5 from the cockpit.

In addition, in the exfoliation cutting structure of the present invention, an example in which a rotary drum 5 having the same cutting depth in the direction of the rotation axis is shown above, but, for example, a peak or a valley is formed in the center in the axial direction. Alternatively, if a material in which peaks and valleys are formed continuously in the axial direction is adopted, the peeled cutting surface can be a surface with undulating peaks and valleys.

In the above, the exfoliation cutting structure has been explained using an example in which it is installed in the exfoliation cutting machine 11, but it may be employed not only in heavy machinery but also in a handy type exfoliation cutting tool, for example. Further, as described above, the guide portion 6 may be provided not only at one end of the rotating drum 5 in the axial direction but also at both ends, and the swinging mechanism may be provided by a cylinder device rather than the hydraulic motor M. It is also possible to adopt a structure in which the advancing/retracting mechanism is adjusted by advancing and retracting a screw instead of using the cylinder devices S1 and S2.

1 1st bracket 2 2nd bracket 3 3rd bracket 4 4th bracket 5 Rotating drum 6 Guide section 6A Reference surface 6B, 6B Edge surface 7 Gauge body (confirmation section)
7A Index weight 7B Horizontal weight M Hydraulic motor (oscillating mechanism)
S1, S2 Cylinder device 1A Purification section 1B Mounting section

Claims (5)

In a bracket that pivotally supports a rotating drum provided with a plurality of bits for peeling and cutting, a bracket is formed in the diametrical direction of the rotating drum on at least one end side of both end surfaces of the rotating shaft of the rotating drum , and does not follow the settling surface. A peeling cutting structure characterized in that a guide portion is provided having a reference surface and edge surfaces formed at a predetermined angle on both sides of the rotating drum in the circumferential direction with the reference surface in between. 2. The exfoliation cutting structure according to claim 1, further comprising a swinging mechanism that swings the entire bracket in the direction of both ends of the rotating shaft of the rotating drum. 3. The exfoliating cutting structure according to claim 1, wherein the bracket includes an advancing/retracting mechanism for moving the guide portion back and forth in a diametrical direction of the rotating drum. Claims 1 to 3 further include a confirmation part for confirming that at least the edge surface of the guide part is in contact with the exfoliation cutting surface at a predetermined angle and at a predetermined depth. Peeling cutting structure. According to any one of claims 1 to 4, the rotating drum is characterized in that a mountain or a valley is formed in the center in the axial direction, or a mountain and a valley are formed continuously in the axial direction. Peeling cutting structure.

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