JP2018046784A - Work implement and compacting roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work implement capable of pulverizing a clod and pressing and solidifying soil firmly.SOLUTION: A work implement includes a compacting roller connected to a travel machine body and supported so as to rotate with a center line in a different direction from a travel direction of the travel machine body as a center. The compacting roller has a generally cylindrical shape including a plurality of curved faces and constituted by combining the plurality of curved faces. Each of the plurality of curved faces has a shape such that a distance from the center line to the curved face is larger on a rotation direction rear side of the compacting roller than that on the rotation direction front side of the compacting roller. A rear side edge of the plurality of the curved faces forms a predetermined angle with the center line and the plurality of the curved faces are twisted.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a working machine including a pressure reducing roller that is connected to a traveling machine body and is rotatably supported around a predetermined center line, and the pressure reducing roller.

  Patent Document 1 discloses a pressure reducing roller that is supported on a rear cover of a tractor via a frame.

JP 2004-159527 A

  However, in the configuration of Patent Document 1 (particularly FIG. 5), the pressure-reducing roller is a cylindrical roller, and the field is compressed by its own weight without being driven by itself. For this reason, the soil mass could not be crushed and the soil could not be sufficiently pressed.

  In view of the above circumstances, an object of the present invention is to provide a working machine and a pressure-reducing roller capable of crushing a soil mass and firmly pressing the soil.

  According to the present invention, in the working machine including the pressure roller connected to the traveling machine body and supported rotatably about a center line in a direction different from the traveling direction of the traveling machine body, the pressure reduction roller has a plurality of curved surfaces. Each of the plurality of curved surfaces has a distance from the center line to the curved surface in the rotation direction of the pressure reducing roller from the front side in the rotation direction of the pressure reduction roller. The working machine is characterized in that the rear side has a larger shape, the rear ends of the plurality of curved surfaces form a predetermined angle with the center line, and the plurality of curved surfaces are twisted.

  According to another invention of the present invention, in the working machine including a pressure reducing roller connected to the traveling machine body and supported rotatably about a center line in a direction different from the traveling direction of the traveling machine body, the pressure reducing roller is It has a substantially cylindrical shape having a plurality of curved surfaces and a connecting surface connecting the plurality of curved surfaces, and is configured by combining the plurality of curved surfaces and the connecting surfaces, each of the plurality of curved surfaces from the center line to the curved surface Is a shape in which the rear side in the rotational direction of the pressure roller is larger than the front side in the rotational direction of the pressure roller, and the connecting surface has a distance from the center line that is greater than the rear side in the rotational direction of the pressure roller. A working machine is provided in which the front side in the rotation direction of the pressure reducing roller has a larger shape, and rear ends of the plurality of curved surfaces are parallel to the center line.

  According to another invention of the present invention, it is a substantially cylindrical shape having a plurality of curved surfaces and configured by combining the plurality of curved surfaces, and each of the plurality of curved surfaces is from a center line that is a rotation center to the curved surface. The distance is such that the rear side in the rotational direction is larger than the front side in the rotational direction, the rear ends of the curved surfaces form a predetermined angle with the center line, and the curved surfaces are twisted. A pressure reducing roller is provided.

  According to another invention of the present invention, it is a substantially cylindrical shape having a plurality of curved surfaces and a connecting surface connecting the plurality of curved surfaces, and configured by combining the plurality of curved surfaces and the connecting surfaces, Each has a shape in which the distance from the center line that is the center of rotation to the curved surface is larger on the rear side in the rotational direction than on the front side in the rotational direction, and the connecting surface has a distance from the center line that is greater than the rear side in the rotational direction. There is also provided a pressure reducing roller characterized in that the front side in the rotational direction is larger and the rear ends of the plurality of curved surfaces are parallel to the center line.

  According to the present invention, the soil mass is crushed and the soil can be firmly pressed.

It is a side view which shows the working machine which concerns on 1st Embodiment of this invention, and the traveling body which pulls a working machine. (A) is a side view of the pressure reducing roller according to the first embodiment. (B) is a rear view along the arrow X1 direction of (A). (C) is a perspective view of a pressure reducing roller. (A) is a side view of the pressure reducing roller according to the second embodiment. (B) is a rear view along the arrow X1 direction of (A). (C) is a perspective view of a pressure reducing roller. (A) is a side view of the pressure reducing roller according to the third embodiment. (B) is a rear view along the arrow X1 direction of (A). (C) is a perspective view of a pressure reducing roller. It is a side view which shows the structure of the traveling body with which the working machine which concerns on 4th Embodiment of this invention is connected, and a working machine. It is a side view which shows the state by which the suppression roller was lifted rather than the rotation rotor. It is a side view which shows the state in which the suppression roller was lowered | hung rather than the rotation rotor. It is a partially expanded plan view of the work machine.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The following embodiments are examples of the embodiments of the present invention, and the present invention is not limited to these embodiments. Note that in the drawings referred to in this embodiment, the same portions or portions having similar functions are denoted by the same reference symbols or similar symbols, and repeated description thereof may be omitted.

  Further, for convenience of explanation, the description will be made using the terms “front” or “rear”, but the front indicates the direction of the traveling machine body 500 that pulls the work machine 100 relative to the work machine 100, and the rear indicates the direction of the work machine 100 relative to the traveling machine body 500. Show.

  Furthermore, for convenience of explanation, the front side (front side in the rotational direction) or the rear side (rear side in the rotational direction) will be described, but the front side or the rear side is the direction in which the pressure reducing roller 10 (see FIGS. 2 to 4) moves. Or indicate the position. For example, when the pressure reducing roller 10 rotates, a position where the pressure reducing roller 10 passes first is referred to as a front side, and a position where the pressure reducing roller 10 passes thereafter is referred to as a rear side. In other words, the rotation direction K side of the pressure reducing roller 10 is referred to as a front side, and the direction opposite to the rotation direction K of the pressure reduction roller 10 is referred to as a rear side.

(First embodiment)
FIG. 1 is a side view showing a work machine 100 according to a first embodiment of the present invention and a traveling machine body 500 that pulls the work machine 100. In the rear part of the traveling machine body 500, an upper shaft 501 is provided on the upper side, and two lower shafts 502 (only one is visible in FIG. 1) are provided on the lower side. A work machine 100 is disposed behind the traveling machine body 500. The work machine 100 has a frame 100A. The working machine frame 100 </ b> A includes a transmission frame 62 that transmits the driving force of the traveling machine body 500.

  An upper shaft 501 and a lower shaft 502 are connected to the traveling machine body 500. A locking plate 503 is rotatably provided on the upper shaft 501, and a hook 503a is provided on the locking plate 503. The lower shaft 502 is provided with a rotation plate 504 and a locking piece 505 in this order, and the locking piece 505 is provided with a clamping portion 505a.

  On the other hand, the work machine 100 includes a frame 100A. A top mast 101 is provided at the upper part of the frame 100A, and a lower arm 102 is provided at the lower part of the frame 100A. The top mast 101 is provided with a locked shaft 101a, and the lower arm 102 is provided with a locked shaft 102a. The hook 503 a is locked to the locked shaft 101 a, the locked shaft 102 a is clamped by the clamping portion 505 a of the locking piece 505 and the rotating plate 504, and the work machine 100 is connected to the traveling machine body 500. .

  Further, a rotation center shaft 61 of the pressure reducing roller 10 is provided with respect to the above-described frame 100A. The transmission frame 62 and the rotation center shaft 61 are provided with gears 66 and 64 at the ends, and a rotational force transmission unit is attached thereto. The rotational force transmitting portion here includes the first chain 103. The first chain 103 is rotatably suspended by a gear 66 at the end of the transmission frame 62 and a gear 64 at the end of the rotation center shaft 61. The transmission frame 62 rotates about a center line 62a (rotation center), and the rotation center shaft 61 rotates about the first center line 10a.

  The power transmitted from the traveling machine body 500 to the transmission frame 62 is transmitted to the rotation center shaft 61 via the first chain 103 and becomes the rotation force of the rotation center shaft 61.

  The work machine 100 includes a pressure reducing roller 10. The pressure reduction roller 10 is a roller that advances in the traveling direction L as the traveling machine body 500 travels forward and suppresses the field 300.

  The pressure reducing roller 10 is a member that is rotatably supported around a first center line 10a in a direction different from the traveling direction L of the traveling machine body 500. The first center line 10a is not necessarily perpendicular to the traveling direction L of the traveling machine body 500, and the pressure reducing roller 10 may be attached so as to be inclined at a predetermined angle.

  The pressure reduction roller 10 has a plurality of curved surfaces 10d and has a substantially cylindrical shape configured by combining the plurality of curved surfaces 10d. Here, the pressure reducing roller 10 also has a connecting surface 10D between the plurality of curved surfaces 10d. The connecting surface 10D is a surface that connects the curved surfaces 10d. There are six convex portions 10c having the connecting surface 10D and the curved surface 10d. The plurality of convex portions 10 c are convex in the direction away from the first center line 10 a with respect to the pressure reducing roller 10. In FIG. 1, since the pressure roller 10 rotates in the rotation direction K, the upper surface of the pressure roller 10 moves forward and the lower surface of the pressure roller 10 moves backward.

  Here, although the pressure-reducing roller 10 is integrally formed with the roller main body portion 10b and the plurality of convex portions 10c, it can also be configured separately. As the first chain 103 rotates the rotation center shaft 61, the pressure reducing roller 10 rotates around the first center line 10a.

(Connecting surface)
The distance from the first center line 10a increases as the connecting surface 10D moves from the rear side K1 to the front side K2 in the rotation direction K. The connecting surface 10 </ b> D is intermittently disposed along the circumferential direction with a step so that an intermittent tapping action is applied to the surface of the farm field 300.

(curved surface)
Each of the plurality of curved surfaces 10d has a shape in which the distance from the first center line 10a to the curved surface 10d is larger in the rotation direction K on the rear side K1 than on the front side K2. The curved surface 10d has a rear end 10d1 (see FIG. 2), a vertex portion 10d0, a curved surface portion 10d2, and a front end 10d3 in order in the rotation direction K.

  The rear end 10d1 is a portion protruding in a plate shape on the rear side K1 in the rotation direction K with respect to the apex portion 10d0. The vertex portion 10d0 is an intersection line between the upper edge portion of the connecting surface 10D and the curved surface portion 10d2, and has the largest distance from the first center line 10a. The curved surface portion 10d2 is formed as a curved surface so that the distance from the first center line 10a becomes smaller toward the front side K2 in the rotation direction K. The front end 10d3 is an intersection line between the curved surface portion 10d2 and the lower edge portion of the connecting surface 10D, and the distance from the first center line 10a is the shortest.

  When the surface of the pressure reducing roller 10 is traced in the rotational direction K, it approaches the first center line 10a as it goes from the rear end 10d1 to the front end 10d3, and when it reaches the front end 10d3, there is a connecting surface 10D. It moves away from the first center line 10a.

  The surface rotation speed at which the surface of the pressure reducing roller 10 rotates is set faster than the surface rotation speed at which the tire of the traveling machine body 500 rotates. That is, the pressure-reducing roller 10 is slipped with respect to the surface of the field 300 in the predetermined direction by the first chain 103 as the rotational force transmitting unit, that is, in the rotation direction K in which the surface of the pressure-reducing roller 10 is directed in the traveling direction L. It is designed to rotate.

  More specifically, the pressure reducing roller 10 is forced to slip in the rotational direction K with a peripheral speed faster than the moving speed in the traveling direction L based on the power from the first chain 103 as the rotational force transmitting unit. It is designed to rotate. Therefore, the pressure reducing roller 10 is rotated by receiving a driving force without being dragged.

(First embodiment) (oblique tooth-like pressure reducing roller) (from one end to the other end)
FIG. 2A is a side view of the pressure reducing roller 10 according to the first embodiment. FIG. 2B is a rear view along the arrow X1 direction of FIG. FIG. 2C is a perspective view of the pressure reducing roller 10. In the present embodiment, the rear ends 10d1 of the plurality of curved surfaces 10d form a predetermined angle with the first center line 10a, and the plurality of curved surfaces 10d are twisted. The plurality of curved surfaces 10d are inclined.

  At the position of one end 10bL in the work machine width direction M parallel to the first center line 10a in the plurality of convex portions 10c, there is an apex where the length of the perpendicular Z1 extending from the first center line 10a is the maximum. Exists. The vertex having the maximum length of the perpendicular line Z1 is defined as a first vertex J1.

  At the position of the other end portion 10bR in the work machine width direction M in the plurality of convex portions 10c, there is a vertex where the length of the perpendicular line Z2 extending from the first center line 10a is maximum. A vertex having the maximum length of the perpendicular line Z2 is defined as a second vertex J2.

  The second vertex J2 is provided at a position on the front side K2 in the rotation direction K rather than the first vertex J1, and the first vertex J1 and the second vertex J2 are connected by a line segment.

  According to such a structure, the vibration at the time of suppressing the agricultural field 300 is reduced because the some convex-shaped part 10c is an oblique-tooth shape. For example, when the plurality of convex portions 10c have a spur shape, the first center is changed when the front end 10d3 is in contact with the field 300 and the rear end 10d1 is in contact with the field 300. The pressure-reducing roller 10 simultaneously contacts the field 300 from one end side to the other end side of the wire 10a. This rapid operation causes vibration of the pressure reducing roller 10.

  However, when the plurality of convex portions 10c are inclined, when the front end 10d3 is in contact with the farm field 300 and the rear end 10d1 is in contact with the farm 300, it is inclined. Will gradually come into contact with the field 300 from the front side in the traveling direction L. This relaxing operation reduces the vibration of the pressure reducing roller 10.

(2nd Embodiment) (Angle-like pressure reducing roller) (end part-center part)
FIG. 3A is a side view of the pressure reducing roller 10 according to the second embodiment. FIG. 3B is a rear view along the arrow X1 direction of FIG. FIG. 3C is a perspective view of the pressure reducing roller 10. In the present embodiment, the pressure reducing roller 10 is divided into a plurality of sections N1 and N2 (regions N1 and N2) in the direction of the first center line 10a. In each of the sections N1 and N2, the angles formed by the rear end 10d1 of the plurality of curved surfaces 10d and the first center line 10a are different, and the directions in which the plurality of curved surfaces 10d are twisted are different.

  A vertex having the maximum length of the perpendicular Z1 extending from the first center line 10a provided at the end in the work machine width direction M parallel to the first center line 10a in the plurality of convex portions 10c is defined as a first vertex J1. To do.

  A vertex having the maximum length of the perpendicular Z3 extending from the first center line 10a provided at the center position 10a2 in the work machine width direction M in the plurality of convex portions 10c is defined as a third vertex J3.

  In such a case, the third vertex J3 is provided at a position on the front side K2 in the rotation direction K rather than the first vertex J1, and the first vertex J1 and the third vertex J3 are connected by a line segment. The distance between the first vertex J1 and the first center line 10a is substantially the same as the distance between the third vertex J3 and the first center line 10a.

  If another expression is borrowed from the expression used for the screw, the plurality of convex portions 10c are arranged in a direction along the first center line 10a, and a left-twisted oblique tooth-like portion 10c1 and a right-twisted oblique tooth-like portion. 10c2. In the direction along the first center line 10a, the apex of the left twisted inclined tooth portion 10c1 is located on the front side K2 from the one end 10bL to the center 10a0. The right twisted inclined tooth-like portion 10c2 has a vertex located on the front side K2 from the other end portion 10bR to the center 10a0. In the present embodiment, the left twisted inclined tooth-like portion 10c1 and the right twisted inclined tooth-like portion 10c2 are formed one by one.

  As described above, the left twisted inclined tooth-like portion 10c1 and the right twisted oblique tooth-like portion 10c2 are symmetrically arranged with respect to the center 10a0 in a direction along the first center line 10a. Therefore, the pressure reducing roller 10 can uniformly reduce the field 300 in the direction along the first center line 10a.

  With such a configuration, the plurality of convex portions 10 c firmly enter the soil gap of the field 300, and the soil is gradually and strongly consolidated as the pressure reducing roller 10 rotates.

  As shown in FIG. 3B, the rotation center shaft 61 is passed through the center of the pressure reducing roller 10. A plate 12L is attached to the left end 61L of the rotation center shaft 61, and a plate 12R is attached to the right end 61R of the rotation center shaft 61. A gap S1 is formed between the left end 61L and the plate 12L, and a gap S2 is formed between the right end 61R and the plate 12R.

  For example, as will be described later with reference to FIG. 8, the plate 12 </ b> L is coupled to a plate 30 a attached to the cover 30. The plate 12R is coupled to a plate 40a attached to the frame 40.

  In the present embodiment, two sections have been described. However, the number of sections is not limited to two, and may be three or more.

  Further, as shown in FIGS. 3B and 3C, the twist angles are configured in order of positive and negative from the left side. That is, the section N1 is positive (see arrow Q1), and the section N2 is negative (see arrow Q2). However, although not shown, the twist angles may be configured in order of negative and positive from the left side. That is, in this case, the section N1 is negative and the section N2 is positive.

  Further, if there are three or more sections, the twist angle may be positive / zero / negative or negative / zero / positive. That is, there may be a portion where the twist angle is zero with respect to the first center line 10a between the section N1 and the section N2.

(Third embodiment) (Flat tooth-like pressure reducing roller)
FIG. 4A is a side view of the pressure reducing roller 10 according to the third embodiment. FIG. 4B is a rear view along the arrow X1 direction of FIG. FIG. 4C is a perspective view of the pressure reducing roller 10. In the present embodiment, the rear ends 10d1 of the plurality of curved surfaces 10d are parallel to the first center line 10a. At the position of one end 10bL in the work machine width direction M parallel to the first center line 10a in the plurality of convex portions 10c, there is an apex where the length of the perpendicular Z1 extending from the first center line 10a is the maximum. Exists. The vertex having the maximum length of the perpendicular line Z1 is defined as a first vertex J1.

  At the position of the other end 10bR in the work machine width direction M of the plurality of convex portions 10c, there is a vertex where the length of the perpendicular line Z4 extending from the first center line 10a is maximum. The vertex having the maximum length of the perpendicular line Z4 is defined as a fourth vertex J4.

  In such a case, when viewed from the first center line 10a, the first vertex J1 and the fourth vertex J4 are provided at substantially the same position in the rotation direction K, and the first vertex J1 and the fourth vertex J4 are line segments. Tied.

  Here, each of the plurality of curved surfaces 10d has a shape in which the distance from the first center line 10a to the curved surface 10d is larger in the rotation direction K on the rear side K1 than on the front side K2.

  On the other hand, each of the plurality of connecting surfaces 10D has a shape in which the distance from the first center line 10a is larger on the front side K2 than on the rear side K1 in the rotation direction K. Since the connecting surface 10D has such an inclined surface, the curved surface portion 10d2 rotates while contacting the surface of the farm field 300, and the next curved surface portion 10d2 rotates while contacting the surface of the farm field 300. By passing through the surface 10D, the transition from the curved surface portion 10d2 to the next curved surface portion 10d2 becomes smooth, and the phenomenon that a plurality of curved surfaces 10d come into contact with the field 300 at a stretch each time the pressure reducing roller 10 rotates is suppressed.

  In the present embodiment, the plurality of convex portions 10c can be said to have a spur shape if expressed in the shape of a screw. As shown in FIG. 4, the rotation center shaft 61 is passed through the center of the pressure reducing roller 10. A plate 12L is attached to the left end 61L of the rotation center shaft 61, and a plate 12R is attached to the right end 61R of the rotation center shaft 61.

  In addition, the pressure reducing roller 10 has one end 10 bL formed at the left end of the pressure reducing roller 10 and the other end 10 b R formed at the right end of the pressure reducing roller 10. A gap S1 is formed between one end 10bL and the plate 12L, and a gap S2 is formed between the other end 10bR and the plate 12R.

(Fourth embodiment)
FIG. 5 is a side view showing the configuration of the traveling machine body 500 to which the working machine 200 according to the fourth embodiment of the present invention is coupled, and the working machine 200. FIG. 6 is a side view showing a state in which the pressure reducing roller 10 is lifted. FIG. 7 is a side view showing a state in which the pressure reducing roller 10 is lowered. The work machine 200 according to the fourth embodiment is different from the work machine 100 according to the first embodiment in that the work machine 200 is attached to the traveling machine body 500 via the rotary rotor 20. 5-7, the pressure-reducing roller 10 of 1st Embodiment is illustrated, However, The pressure-reducing roller 10 of 2nd Embodiment or 3rd Embodiment may be applied instead.

  As shown in FIG. 5, the working machine 200 is provided with a rotating rotor 20 having a plurality of claws 20 b that dig up the soil of the farm field 300 between the traveling machine body 500 and the pressure reducing roller 10. The rotating rotor 20 rotates around a second center line 20a different from the first center line 10a. The work machine 200 includes a rotational force transmission unit 105. The rotational force transmission unit 105 includes a first chain 103 that rotates the pressure reducing roller 10 and a second chain 104 that rotates the rotary rotor 20. The rotational force transmission unit 105 transmits the rotational force from the rotary rotor 20 to the pressure reducing roller 10 by the first chain 103.

  An adjustment unit 50 is provided that is attached to the frame 100A of the work machine 200 and adjusts the height of the pressure reducing roller 10. A compressed gas spring is used as the adjustment unit 50. The compressed gas spring is a gas spring that is shortened from a natural length when pressed and has a biasing force in the extending direction. The work machine 200 includes a cover 30 that covers the first chain 103. The adjustment unit 50 adjusts the height of the pressure reducing roller 10 by moving the cover 30 in the vertical direction. Thus, the adjustment unit 50 adjusts the difference in height between the pressure reducing roller 10 and the rotary rotor 20. And especially in the state where the rotary rotor 20 is floating from the surface of the field 300 while the pressure roller 10 is in contact with the surface of the field 300, the pressure roller 10 is urged downward by the adjustment unit 50, and the surface of the field 300 To follow.

  If the distance by which the adjusting unit 50 pushes the cover 30 is large, the first center line 10a can be set to a low position. Moreover, if the distance which the adjustment part 50 pushes the cover 30 is small, it can set to the position where the 1st centerline 10a is high.

  As shown in FIG. 6, when the adjustment unit 50 moves the pressure reducing roller 10 upward, the rotary rotor 20 comes into contact with the farm field 300. When there is a lot of moisture in the field 300 and it is not necessary to use the pressure-reducing roller 10, the height relationship may be set.

  Further, as shown in FIG. 7, when the adjusting unit 50 moves the pressure reducing roller 10 downward, the rotary rotor 20 is separated from the field 300. Such a height relationship may be set when the field 300 is already cultivated and does not need to be cultivated. The adjusting unit 50 described above may be a hydraulic type or an electric type.

  FIG. 8 is a partially enlarged plan view of the work machine 200. In particular, it is a plan view showing the rotation center axis 61 rotating around the first center line 10a, the convex portion 10c, and the rotation center axis 63 rotating around the second center line 20a.

  The rotary rotor 20 includes a rotation center shaft 63 having a second center line 20a. A gear 65 is attached to one end 20 a 1 of the second center line 20 a of the rotation center shaft 63. A plate 12L is attached to the left end 61L of the rotation center shaft 61, and a gear 64 is attached to the plate 30a facing the plate 12L.

  The first chain 103 is suspended from the gear 65 and the gear 64. The driving force of the second center line 20a is transmitted to the first center line 10a via the first chain 103.

  According to such a configuration, the field 300 can be pressure-reduced by the pressure-reducing roller 10 in accordance with the plowing operation by the rotary rotor 20.

  A plate 12R is attached to the right end 61R of the rotation center shaft 61 that rotates around the first center line 10a. The plate 12R is joined to a plate 40a attached to the frame 40. The other end 20a2 of the rotation center shaft 63 that rotates around the second center line 20a is rotatably supported by the frame 40. There is no transmission of driving force on this side.

  According to the configuration of the first to fourth embodiments described above, when the pressure reducing roller 10 rotates around the first center line 10a, the plurality of convex portions 10c firmly enter the gaps in the soil of the field 300, and the mass. As the material is crushed, the finely ground soil is strongly pressed. As a result, the field is strongly suppressed and an optimum field without water leakage is obtained.

10: pressure-reducing roller, 10a: first center line, 20: rotating rotor, 20a: second center line, 30: cover, 50: adjustment unit, 100: working machine, 103: first chain, 104: second chain, 300: field, 500: traveling machine body, L: traveling direction, K: rotational direction, K1: rear side, K2: front side

Claims (8)

In a working machine including a pressure reducing roller that is connected to a traveling machine body and is rotatably supported around a center line in a direction different from the traveling direction of the traveling machine body,
The pressure reducing roller has a plurality of curved surfaces and has a substantially cylindrical shape configured by combining the plurality of curved surfaces. It is a shape that the rear side of the rotation direction of the pressure roller is larger than
The working machine, wherein rear ends of the plurality of curved surfaces form a predetermined angle with the center line, and the plurality of curved surfaces are twisted.   2. The work machine according to claim 1, wherein the pressure reducing roller is divided into a plurality of regions in the center line direction, and the angle formed between the rear end of the plurality of curved surfaces and the center line is different in each region. The working machine characterized in that directions in which the plurality of curved surfaces are twisted are different. In a working machine including a pressure reducing roller that is connected to a traveling machine body and is rotatably supported around a center line in a direction different from the traveling direction of the traveling machine body,
The pressure reducing roller has a plurality of curved surfaces and a connecting surface connecting the plurality of curved surfaces, and has a substantially cylindrical shape configured by combining the plurality of curved surfaces and the connecting surfaces, and each of the plurality of curved surfaces is the center line The distance from the curved surface is such that the rear side in the rotational direction of the pressure roller is larger than the front side in the rotational direction of the pressure roller, and the connecting surface has a distance from the center line in the rotational direction of the pressure roller. A working machine having a shape in which the front side in the rotation direction of the pressure roller is larger than the rear side, and rear ends of the plurality of curved surfaces are parallel to the center line.   The working machine according to any one of claims 1 to 3, further comprising means for adjusting a height of the pressure reducing roller.   The working machine according to claim 1, wherein a rotating rotor having a plurality of claws is provided between the traveling machine body and the pressure reducing roller.   Each of the plurality of curved surfaces has a distance from the center line, which is the center of rotation, to the curved surface after the rotational direction before the rotational direction. A pressure reducing roller, wherein the side has a larger shape, rear ends of the plurality of curved surfaces form a predetermined angle with the center line, and the plurality of curved surfaces are twisted.   7. The pressure reducing roller according to claim 6, wherein the plurality of curved surfaces are divided into a plurality of regions in the direction of the center line, and the angles formed by rear ends of the plurality of curved surfaces and the center line are different in each region. A pressure-reducing roller characterized in that the twisting direction is different.   It has a substantially cylindrical shape having a plurality of curved surfaces and a connecting surface that connects the plurality of curved surfaces, and is configured by combining the plurality of curved surfaces and the connecting surfaces, and each of the plurality of curved surfaces is from a center line that is a rotation center The distance to the curved surface is such that the rear side in the rotational direction is larger than the front side in the rotational direction, and the connecting surface is such that the distance from the center line is greater on the front side in the rotational direction than on the rear side in the rotational direction. A pressure reducing roller, wherein rear ends of the plurality of curved surfaces are parallel to the center line.

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