Roll crusher

Abstract

To eliminate eccentric wear caused in a pair of rolls without replacing the pair of rolls.SOLUTION: A roll crusher 1 crushes a target object between a first roll 11 which is rotated by a first drive part 13 and a second roll 12 which is rotated by a second drive part 14, the first roll and the second roll being rotatably supported by a frame 2 such that a rotating shaft 11a of the first roll 11 and a rotating shaft 12a of the second roll 12 are aligned in parallel with each other. The first roll 11 and the second roll 12 are rotated in opposite directions by a first cutting drive part 17 and a second cutting drive part 18 at a rotation number smaller than that during crushing. A first cutting part 15 having a blade 34 for grinding a surface of the first roll 11 and a second cutting part 16 having a blade 34 for grinding a surface of the second roll 12 can travel on a first guide rail 6 and a second guide rail 7 which are arranged on the frame 2 via wheels 31, and the wheels 31 are arranged so as to be slidable in a vertical direction with respect to the first cutting part 15 and the second cutting part 16.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a roll crusher for crushing an object to be processed between a pair of rolls.

Background Art

[0002] Conventionally, a roll crusher having a pair of rolls with rotation axes installed in parallel, rotating the pair of rolls in opposite directions to crush an object to be processed between the pair of rolls, is known. In this roll crusher, depending on the type of the object to be processed, the interval between the pair of rolls can be arbitrarily set to obtain a processed product of a desired size.

[0003] In this roll crusher, wear occurs on the surfaces of the pair of rolls due to long-term processing of the object to be processed. Furthermore, for example, when processing relatively hard objects to be processed such as concrete, natural stone, and ore, wear on the surfaces of the pair of rolls progresses rapidly. When such wear on the surfaces of the pair of rolls occurs uniformly in the axial direction of the rotation axis and the circumferential direction of the roll, a processed product of a required size can be obtained by adjusting the interval between the pair of rolls.

[0004] However, when the object to be processed is processed in a state where it is biased in the axial direction between the pair of rolls, uneven wear occurs on the surfaces of the pair of rolls, which is uneven in the axial direction of the rotation axis or the circumferential direction of the roll. When uneven wear occurs, wear is likely to be promoted only in that portion, and the interval between the pair of rolls becomes uneven only in that portion, making it impossible to obtain a processed product of a desired size.

[0005] When uneven wear occurs in a pair of rolls, it is common practice to replace the rolls. Therefore, a roll crusher that facilitates roll replacement is known (see, for example, Patent Document 1). In the roll crusher described in Patent Document 1, each pair of crushing rollers (rolls) comprises a tire wheel fixed to a drive shaft (rotating shaft), a pneumatic tire fitted around the outer circumference of the tire wheel with adjustable air pressure, and a cylindrical body harder than the material to be processed, mounted around the outer circumference of the pneumatic tire.

[0006] In the roll crusher described in Patent Document 1, which is equipped with such a roll, the cylindrical body of the roll can be attached and detached by adjusting the air pressure of the pneumatic tire when replacing the roll.

[0007] Furthermore, depending on the physical properties of the material being processed, it may adhere to the surface of the pair of rolls. If the material is processed while it is adhering to the surface of the pair of rolls, the aforementioned uneven wear may occur on the surface of the pair of rolls.

[0008] When uneven wear occurs on a pair of rolls due to the adhesion of materials being processed, a roll crusher has been proposed that is equipped with a scraper as a scraping mechanism on the crushing rolls (rolls), and during crushing, the scraper scrapes off the material adhering to the surfaces of the pair of rolls (see, for example, Patent Document 2). [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2006-297340 [Patent Document 2] Japanese Patent Application Publication No. 53-34167 [Overview of the project] [Problems that the invention aims to solve]

[0010] Typically, the rolls of a roll crusher are large components, and therefore the cylindrical body of the roll crusher described in Patent Document 1 is also a large component. For this reason, the replacement of the cylindrical body is time-consuming and complicated due to the need to adjust the air pressure of the pneumatic tire and to remove and install the large cylindrical body.

[0011] Furthermore, in the roll crusher described in Patent Document 2, it is possible to scrape off deposits on the roll surface with a scraper without replacing the roll. However, it is difficult to eliminate uneven wear that occurs on the roll with a scraper that scrapes off deposits on the roll surface.

[0012] Therefore, the object of this invention is to provide a roll crusher that can eliminate uneven wear on a pair of rolls without replacing the pair of rolls. [Means for solving the problem]

[0013] To solve the above problems, this invention provides a roll crusher comprising a pair of rolls with parallel rotating axes and a drive unit for rotating the pair of rolls, wherein the crusher crushes the material to be processed between the pair of rolls rotated by the drive unit, and further comprising a cutting drive unit that rotates the rolls at a rotational speed lower than the rotational speed of the pair of rolls rotated by the drive unit, and a cutting unit equipped with a blade, wherein the blade of the cutting unit shaves the surface of the roll while the rolls are rotating by the cutting drive unit.

[0014] With this configuration, when uneven wear occurs on the surface of a pair of rolls, the cutting unit rotates the rolls, and the cutting blade of the cutting unit removes material from the surface of the rolls, making it possible to make the distance between the pair of rolls uniform in the axial direction of the rotation axis without replacing the rolls.

[0015] A configuration can be adopted in which the cutting drive unit and cutting unit are provided for each of the pair of rolls, and the cutting unit is provided at an outward position in the direction in which the rotation axes of the pair of rolls are aligned.

[0016] With this configuration, the cutting edge of one cutting section can cut the surface of one of the pair of rolls, and the cutting edge of the other cutting section can cut the surface of the other roll of the pair. As a result, for example, if uneven wear occurs on the surface of one of the pair of rolls, the cutting edge of the cutting section located closer to that roll can easily cut the surface of the roll.

[0017] Each of the cutting sections can be configured to have a cutting movement device that allows it to move between a cutting position where it cuts the surface of the roll located closer to the pair of rolls, and a non-cutting position away from the roll located closer to the pair.

[0018] In this configuration, the cutting and moving device allows the two cutting sections to move to a cutting position where they cut the surface of the roll located closer to them when cutting the surface of the roll, and to a non-cutting position when crushing the material between the pair of rolls.

[0019] The cutting unit moving device may have a frame that rotatably supports the rotation axis of each of the pair of rolls, a guide rail extending in the direction in which the rotation axes of the pair of rolls are aligned, and wheels on which the cutting unit rolls on the guide rail, and the cutting unit can be configured to travel on the guide rail between the cutting position and the non-cutting position via the wheels.

[0020] Each cutting section can be easily moved between the cutting position and the non-cutting position by running it on a guide rail using the wheels of the cutting section moving device.

[0021] A configuration can be adopted in which the wheel is mounted so as to be slidable vertically relative to the cutting portion, and when the wheel slides upward, the cutting portion is supported by the frame, and when the wheel slides downward, the cutting portion is able to travel on the guide rail.

[0022] In this configuration, when the cutting part is moved to the cutting position, the cutting part is supported by the frame and fixed to the frame. When the surfaces of the pair of rolls are cut by the blade of the cutting part, the cutting part can receive the reaction force acting thereon.

Advantages of the Invention

[0023] According to this invention, without performing the roll replacement work, the surface of the roll can be cut with the blade of the cutting part, eliminating the uneven wear of the roll and keeping the interval between the pair of rolls uniform.

Brief Description of the Drawings

[0024] [Figure 1] Front view showing the roll crusher of the embodiment of this invention [Figure 2] Plan view showing the roll crusher of the embodiment [Figure 3] Front view showing the state where the surfaces of the pair of rolls of the roll crusher of the embodiment are cut by two cutting parts [Figure 4] Front view showing the first cutting part for cutting the surface of one roll of the roll crusher of the embodiment [Figure 5] (a) Partially enlarged side view showing the state where the first cutting part of the roll crusher of the embodiment travels on the first guide rail, (b) Partially enlarged side view showing the state where the first cutting part of the roll crusher of the embodiment is supported by the frame, (c) Partially enlarged side view showing the state where the first cutting part of the roll crusher of the embodiment is fixed to the side frame

Modes for Carrying Out the Invention

[0025] Embodiments of this invention will be described with reference to the drawings. As shown in Figures 1 and 2, the roll crusher 1 according to this embodiment comprises a square box-shaped metal frame 2 with an open top, a pair of first rolls 11 and second rolls 12 rotatably supported within the frame 2, a first drive unit 13 for rotating the first roll 11, and a second drive unit 14 for rotating the second roll 12, and crushes the material to be processed between the first roll 11 and the second roll 12. In this specification, "length direction" means the length direction of the frame 2, and "width direction" means the width direction of the frame 2.

[0026] Furthermore, the roll crusher 1 has a first cutting section 15 that cuts the surface of the first roll 11 and a second cutting section 16 that cuts the surface of the second roll 12. In addition, it has a first cutting drive section 17 that rotates the first roll 11 and a second cutting drive section 18 that rotates the second roll 12.

[0027] As shown in Figures 1 and 2, the frame 2 is constructed by combining a pair of side plates 3 extending in the longitudinal direction and a pair of end plates 4 extending in the width direction in a rectangular frame shape, with a pair of side plates 5 fixed to the top of the pair of side plates 3. The bottom of the frame 2 is open, and the crushed material is transported by a conveyor (not shown). A first guide rail 6 and a second guide rail 7 are provided on both sides of the pair of side plates 5 in the longitudinal direction. The first guide rail 6 is formed from a pair of rails 6a, 6a extending in the longitudinal direction, with each rail 6a provided at the outer ends of the side plates 5 in both the width direction. The second guide rail 7 is formed from a pair of rails 7a, 7a extending in the longitudinal direction, with each rail 7a provided at the outer ends of the side plates 5 in both the width direction.

[0028] The first roll 11 and the second roll 12 have integrally rotating shafts 11a and 12b. Parts of the first roll 11 and the second roll 12 protrude upward from the frame 2. The rotating shaft 11a of the first roll 11 and the rotating shaft 12a of the second roll 12 are aligned horizontally and parallel to each other. The rotating shafts 11a and 12a are spaced apart in the direction in which they are aligned (lengthwise). The rotating shafts 11a and 12a are rotatably supported by bearings 11b and 12b fixed to a pair of side plates 3, 3 of the frame 2, respectively.

[0029] One end of the rotating shaft 11a in the width direction protrudes outward from the side plate 3 of the frame 2. A pulley 19 and a sprocket 21 are fixed to the protruding portion of the rotating shaft 11a. The other end of the rotating shaft 12a in the width direction protrudes outward from the side plate 3 of the frame 2. A pulley 20 and a sprocket 22 are fixed to the protruding portion of the rotating shaft 12a.

[0030] As shown in Figure 2, the first roll 11 and the second roll 12 are covered by a hopper 9 (see dashed line in Figures 1 and 2) and a cover 8 (see dashed line in Figure 2) for feeding the material to be processed. The hopper 9 is installed within the longitudinal range between the rotation axis 11a of the first roll 11 and the rotation axis 12a of the second roll 12, and the cover 8 is installed in the longitudinal range where the hopper 9 is not covered by the first roll 11 and the second roll 12. Here, the cover 8 is designed to be removable during roll cutting.

[0031] The first drive unit 13 and the first cutting drive unit 17 are provided on the outside of the frame 2 on one side in the width direction. The second drive unit 14 and the second cutting drive unit 18 are provided on the outside of the frame 2 on the other side in the width direction. The first drive unit 13 includes an electric motor and a clutch (not shown) as a drive source, and transmits the driving force of the rotating shaft 13a of the electric motor to the rotating shaft 11a via a belt 13b and a pulley 19. The second drive unit 14 includes an electric motor and a clutch (not shown) as a drive source, and transmits the driving force of the rotating shaft 14a of the electric motor to the rotating shaft 12a via a belt 14b and a pulley 20.

[0032] The first drive unit 13 and the second drive unit 14 cause the first roll 11 and the second roll 12 to rotate in opposite directions (see arrow a in Figure 1) so that they face inward when viewed from above. This rotation crushes the material to be processed fed from the hopper 9 between the first roll 11 and the second roll 12. During crushing, the first roll 11 and the second roll 12 rotate in a range of, for example, 100 to 120 rpm.

[0033] The first cutting drive unit 17 is equipped with an electric motor (not shown) and transmits the driving force of the electric motor's rotating shaft 17a to the rotating shaft 11a via a chain 17b and a sprocket 21. The second cutting drive unit 18 is equipped with an electric motor (not shown) and transmits the driving force of the electric motor's rotating shaft 18a to the rotating shaft 12a via a chain 18b and a sprocket 22.

[0034] The first cutting drive unit 17 and the second cutting drive unit 18 cause the first roll 11 and the second roll to rotate in opposite directions (see arrow b in Figure 3) so that they face outward when viewed from above. This rotation is in the opposite direction to the rotation of the first roll 11 and the second roll 12 during crushing described above, and the rotation speed is low, for example, in the range of 8 to 5 rpm.

[0035] As shown in Figure 2, the first cutting section 15 includes a frame-shaped body 30 extending in the width direction, a pair of wheels 31 attached to both sides of the frame-shaped body 30 in the width direction, a slider 32 that moves in the width direction within the frame-shaped body 30, a holder 33 that moves vertically relative to the slider 32, and a cutting tool 34 held by the holder 33.

[0036] As shown in Figure 4, the frame-like body 30 has a rectangular bottom plate 30a, a pair of side plates 30b rising from both ends of the bottom plate 30a in the width direction, a back plate 30c positioned diagonally between the pair of side plates 30b, and a protruding plate 30d projecting outward in the width direction from the pair of side plates 30b. A transverse screw shaft 35 extending in the width direction is rotatably supported between the pair of side plates 30b. The back plate 30c is positioned at an acute angle (e.g., 30 degrees) with respect to the vertical direction. The transverse screw shaft 35 is located on the longitudinal side of the back plate 30c.

[0037] As shown in Figure 5(a), each wheel 31 has a shaft 36a that rotatably supports it. The shaft 36a is rotatably supported by a rectangular box-shaped body 36. The wheels 31 are positioned on the rail 6a of the first guide rail 6. A flange is formed on the outer edge of the outer circumference of the wheel 31 in the width direction to prevent it from coming off the rail 6a. Such a first cutting section 15 has a cutting section moving device having the wheels 31 and the first guide rail 6.

[0038] As shown in Figure 4, flanges 36b are formed on both sides of the box body 36 in the longitudinal direction, and elongated holes 36c are provided in the flanges 36b in the vertical direction. The elongated holes 36c in the flanges 36b of the box body 36 and the side plate 30b of the frame-like body 30 are screw-connected to bolts 37 with nuts (not shown). In this way, the wheel 31 is attached to the frame-like body 30 via the box body 36 so as to be movable in the vertical direction. The box body 36 is in a state where the tip of the positioning bolt 38, which is screwed into the protruding plate 30d of the frame-like body 30, abuts against it.

[0039] As shown in Figure 5(a), when the positioning bolt 38 is screwed into the protruding plate 30d, the box body 36, pushed by the positioning bolt 38, moves downward relative to the frame-like body 30. This downward movement of the box body 36 separates the frame-like body 30 from the side plate 5, allowing the first cutting section 15 to travel on the first guide rail 6 by the wheels 31. As shown in Figure 5(b), when the positioning bolt 38 is rotated in the direction of being withdrawn from the protruding plate 30d, the box body 36 moves upward relative to the frame-like body 30. This upward movement of the box body 36 causes the frame-like body 30 to rest on the side plate 5, and the frame-like body 30 is supported by the side plate 5.

[0040] The slider 32 is a rectangular parallelepiped member and has an internal thread formed along its width. The internal thread of the slider 32 is screw-connected to the transverse screw shaft 35. The surface portion of the slider 32 facing outward in the longitudinal direction is in surface contact with the back plate 30c of the frame-like body 30. A bearing frame 39 is fixed to the surface portion of the slider 32 facing inward in the longitudinal direction. The bearing frame 39 is formed by bending both ends of a strip-like member in the same direction, and the bent portions at both ends rotatably support both ends of the vertical screw shaft 40. The vertical screw shaft 40 is supported parallel to the back plate 30c of the frame-like body 30 and perpendicular to the transverse screw shaft 35.

[0041] The holder 33 is a rectangular parallelepiped member and has an internal thread formed parallel to the vertical screw shaft 40. The internal thread of the holder 33 is screw-connected to the vertical screw shaft 40. The surface portion of the holder 33 facing outward in the longitudinal direction makes surface contact with the surface portion of the bearing frame 39, excluding both ends. A square-shank shaped cutting tool 34 is detachably attached to the surface portion of the holder 33 facing inward in the longitudinal direction. The lower end of the cutting tool 34 has a cutting edge portion formed thereon for cutting the surface of the first roll 11.

[0042] Furthermore, to allow the contact position of the cutting edge of the tool 34 with respect to the first roll 11 to be changed with respect to the rotation center of the rotation axis 11a of the first roll 11 (by drawing a virtual line from the contact position of the cutting edge of the tool 34 with respect to the first roll 11 along the inclination direction of the tool 34 toward the first roll 11, and changing the position of the virtual line with respect to the rotation center of the rotation axis 11a), as shown in Figure 5(c), a liner 41 is detachably provided between the frame-shaped body 30 and the side plate 5, and an elongated hole 36d extending in the longitudinal direction is provided on the lower surface of the box body 36. Also, as shown in Figure 2, an elongated hole 5a extending in the longitudinal direction is provided in the side plate 5 near the first roll 11.

[0043] The second cutting section 16 has the same configuration as the first cutting section 15. The second cutting section 16 differs from the first cutting section 15 in that it is positioned on the second guide rail 7 and its orientation is opposite. For this reason, the second cutting section 16 is given the same reference numerals as the first cutting section 15, and its structural description is omitted. The cutting tool 34 of the second cutting section 16 cuts the surface of the second roll 12. Note that the cutting tool includes not only the cutting tool 34, but also tools that polish the surfaces of the first roll 11 and the second roll 12.

[0044] The roll crusher 1 according to this embodiment of the invention is configured as described above. Crushing of the material to be processed by the roll crusher 1 of this embodiment is carried out as follows.

[0045] First, as shown in Figure 1, the first cutting section 15 is located on the longitudinal outer side of the frame 2 on the first guide rail 6, and its cutting tool 34 is separated from the surface of the first roll 11. Similarly, the second cutting section 16 is also located on the longitudinal outer side of the frame 2 on the second guide rail 7, and its cutting tool 34 is separated from the surface of the second roll 12. In addition, the chain 17b of the first cutting drive unit 17 is detached from the sprocket 21, and the chain 18b of the second cutting drive unit 18 is also detached from the sprocket 22.

[0046] The first drive unit 13 rotates the first roll 11, and the second drive unit 14 rotates the second roll 12. At this time, the first roll 11 and the second roll 12 are each rotated inward when viewed from above (see arrow a in Figure 1) at a required rotational speed within the range of 100 to 120 rpm (110 rpm in this embodiment). The material to be processed fed from the hopper 9 is crushed between the rotating first roll 11 and the second roll 12.

[0047] In the roll crusher 1, uneven wear described above may occur on the surfaces of the first roll 11 and the second roll 12 due to prolonged processing of the workpiece, or due to processing of relatively hard workpieces such as concrete, natural stone, or ore.

[0048] When the aforementioned uneven wear occurs on the surfaces of the first roll 11 and the second roll 12, the roll crusher 1 eliminates the uneven wear in the following manner.

[0049] Specifically, first, the power supply to the electric motor is cut off to stop the rotation of the first roll 11 and the second roll 12 by the first drive unit 13 and the second drive unit 14. Next, the chain 17b is wrapped around the sprocket 21 of the first cutting drive unit 17, and the chain 18b is wrapped around the sprocket 22 of the second cutting drive unit 18.

[0050] Next, after removing the cover 8, the first cutting section 15 is moved longitudinally inward along the first guide rail 6 via the wheels 31 to a position (cutting position) as close as possible to the surface of the first roll 11. Then, as shown in Figure 5(b), the positioning bolts 38 of the first cutting section 15 are rotated in a direction that pulls them out relative to the protruding plate 30d, and the box body 36 is moved upward relative to the frame-shaped body 30. This puts the frame-shaped body 30 in a state where it is supported by the side plate 5. Then, similar to the first cutting section 15, the second cutting section 16 is also put into a state where the frame-shaped body 30 is supported by the side plate 5.

[0051] In this state, if it is necessary to change the contact position of the cutting edge of the tool 34 with respect to the first roll 11 relative to the rotation center of the rotation axis 11a of the first roll 11, a liner 41 is provided between the frame-shaped body 30 and the side plate 5, as shown in Figure 5(c). Subsequently, if necessary, a bolt 42 is inserted between the elongated hole 36d of the box body 36 of the first cutting section 15 and the second cutting section 16 and the elongated hole 5a of the side plate 5 and fastened with a nut. At this time, the contact position of the cutting edge of the tool 34 with respect to the first roll 11 can be adjusted by the position of the bolt 42 relative to the elongated hole 36d of the box body 36 and the elongated hole 5a of the side plate 5. Hereinafter, the fixing of the frame-shaped body 30 of the first cutting section 15 and the second cutting section 16 to the side plate 5 is not limited to the means described above, but known fastening means such as fastening bolts and nuts or tightening a vise can be used.

[0052] Subsequently, the first cutting drive unit 17 rotates the first roll 11, and the second cutting drive unit 18 rotates the second roll 12. At this time, the rotation direction of the first roll 11 and the second roll 12 is opposite to that during crushing as described above, and is outward when viewed from above (see arrow b in Figure 3). The rotation speed is also lower than that during crushing as described above, for example, the required rotation speed within the range of 8 to 5 rpm (6.75 rpm in this embodiment).

[0053] Next, the horizontal screw shaft 35 of the first cutting section 15 is rotated to move the slider 32 to the position in the width direction that needs to be removed from the surface of the first roll 11. Then, the vertical screw shaft 40 is rotated to press the cutting edge of the tool 34 against the surface of the first roll 11, and the surface of the first roll 11 is cut. During this cutting operation, the horizontal screw shaft 35 is rotated to cut the required area in the width direction from the surface of the first roll 11. Similarly to the first cutting section 15, the horizontal screw shaft 35 and the vertical screw shaft 40 of the second cutting section 16 are rotated to cut the surface of the second roll 12.

[0054] The vertical screw shaft 40 of the first cutting unit 15 is rotated to lift the cutting edge of the tool 34 from the surface of the first roll 11, ending the cutting operation. After that, the first cutting unit 15 releases the fixing of the frame-like body 30 and the side plate 5, and tightens the positioning bolts 38 of the frame-like body 30. As a result, as shown in Figure 5(a), the box body 36 moves downward relative to the frame-like body 30, and the frame-like body 30 separates from the side plate 5. In this state, the first cutting unit 15 is moved outward in the longitudinal direction along the first guide rail 6 via the wheels 31 to the non-cutting position. The second cutting unit 16 also ends its cutting operation in the same manner as the first cutting unit 15, and is moved outward in the longitudinal direction along the second guide rail 7 via the wheels 31 to the non-cutting position.

[0055] As described above, the roll crusher 1 of this embodiment can remove the surfaces of the first roll 11 and the second roll 12 by the first cutting section 15 and the second cutting section 16 without replacing the first roll 11 and the second roll.

[0056] Furthermore, the first cutting section 15 and the second cutting section 16 are mounted so as to be slidable vertically relative to the frame-like body 30, with the wheel 31 attached to the box body 36. Therefore, when the box body 36 slides upward relative to the frame-like body 30, the frame-like body 30 is supported by the side plate 5 (supported state). On the other hand, when the box body 36 slides downward relative to the frame-like body 30, the first cutting section 15 and the second cutting section 16 become capable of traveling on the first guide rail 6 and the second guide rail 7 via the wheel 31 (travelable state).

[0057] During the cutting operation described above, the first cutting section 15 (second cutting section 16) is subjected to a reaction force acting outward in the longitudinal direction from the rotating first roll 11 (second roll 12) via the cutting tool 34. In the supported state, the first cutting section 15 (second cutting section 16) can receive the reaction force by fixing the frame-shaped body 30 to the side plate 5. However, if the weight of the first cutting section 15 (second cutting section 16) is sufficiently large, in the supported state, the reaction force can be received by the frictional resistance between the frame-shaped body 30 and the side plate 5 without fixing the frame-shaped body 30 to the side plate 5.

[0058] Furthermore, the first cutting section 15 (second cutting section 16) in the drivable state can be moved longitudinally along the first guide rail 6 (second guide rail 7) via the wheels 31, and can be easily moved between the cutting position and the non-cutting position as described above.

[0059] In this embodiment of the roll crusher 1, as shown in Figure 2, an example was described in which a first cutting drive unit 17 for rotating the first roll 11 and a second cutting drive unit 18 for rotating the second roll 12 are provided. However, it is also possible to have only a single first cutting drive unit 17, and for the first cutting drive unit 17 to rotate both the first roll 11 and the second roll 12.

[0060] Furthermore, in this embodiment of the roll crusher 1, as shown in Figure 1, an example was described in which a first cutting section 15 for cutting the surface of the first roll 11 and a second cutting section 16 for cutting the surface of the second roll 12 are included. However, it is also possible to have only the first cutting section 15, and the first cutting section 15 cuts the surface of either the first roll 11 or the second roll 12. In this case, the first cutting section 15 can be moved onto either the first guide rail 6 or the second guide rail 7. [Explanation of Symbols]

[0061] 1 Roll Crusher 2 frames 3 Side plate 4 End plate 5 Side Plates 5a long hole 6. First guide rail 7. Second guide rail 8 Covers 9 Hoppa 11 First Roll 11a Rotation axis 12 Second Roll 12a Rotation axis 13 First drive unit 14 Second drive unit 15 First cutting section 16 Second cutting section 17 First cutting drive unit 18 Second cutting drive unit 30 Frame-shaped body 31 wheels 32 Sliders 33 Holder 34 bytes (blade) 35 Horizontal screw shaft 36 Box Body 36d long hole 37 volts 38 Positioning bolts 39 Bearing frame 40 Vertical screw shaft 41 Raina 42 volts

Claims

1. A roll crusher comprising a frame, a pair of rolls rotatably supported by the frame and having parallel axis of rotation, and a drive unit for rotating the pair of rolls, wherein the material to be processed is crushed between the pair of rolls rotated by the drive unit, The cutting drive unit rotates the rolls at a rotational speed lower than the rotational speed of the pair of rolls rotated by the drive unit, and the cutting unit is equipped with a blade. With the roll rotating due to the cutting drive unit, the cutting blade of the cutting unit cuts the surface of the roll. A roll crusher characterized in that the cutting section comprises a frame-like body supported by the frame, a transverse screw shaft extending in the direction of the rotation axis and rotatably supported by the frame-like body, a slider screw-connected to the transverse screw shaft and moving along the transverse screw shaft as the transverse screw shaft rotates, a vertical screw shaft extending in a direction perpendicular to the rotation axis and rotatably supported relative to the slider, and a holder screw-connected to the vertical screw shaft and moving along the vertical screw shaft as the vertical screw shaft rotates, and holding the blade.

2. The roll crusher according to claim 1, characterized in that the cutting drive unit and cutting unit are provided for each of the pair of rolls, and the cutting unit is provided at an outward position in the direction in which the rotation axes of the pair of rolls are aligned.

3. The roll crusher according to claim 2, characterized in that each of the cutting sections has a cutting section moving device that allows it to move between a cutting position in which it cuts the surface of the roll located closer to the pair of rolls and a non-cutting position away from the roll located closer to the pair.

4. A roll crusher comprising a pair of rolls with parallel rotating shafts and a drive unit for rotating the pair of rolls, wherein the material to be processed is crushed between the pair of rolls rotated by the drive unit, The cutting drive unit rotates the rolls at a rotational speed lower than the rotational speed of the pair of rolls rotated by the drive unit, and the cutting unit is equipped with a blade. With the roll rotating due to the cutting drive unit, the cutting blade of the cutting unit cuts the surface of the roll. The cutting drive unit and cutting unit are provided for each of the pair of rolls, and the cutting unit is provided at an outward position in the direction in which the rotation axes of the pair of rolls are aligned. Each of the cutting sections has a cutting section moving device that allows it to move between a cutting position where it cuts the surface of the roll located closer to the pair of rolls, and a non-cutting position away from the roll located closer to the pair. The cutting section moving device is a roll crusher characterized in that it has a frame that rotatably supports the rotation axis of each of the pair of rolls, a guide rail extending along the direction in which the rotation axes of the pair of rolls are aligned, and wheels on which the cutting section rolls on the guide rail, and the cutting section travels on the guide rail via the wheels between the cutting position and the non-cutting position.

5. The roll crusher according to claim 4, characterized in that the wheel is mounted so as to be slidable in the vertical direction relative to the cutting portion, and when the wheel slides upward, the cutting portion is supported by the frame, and when the wheel slides downward, the cutting portion is able to travel on the guide rail.

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