JP7836730B2 - Roll crusher - Google Patents

Description

This invention relates to a roll crusher that crushes a material between a pair of rolls.

Conventionally, roll crushers are known that have a pair of rolls with parallel rotating shafts, and rotate the pair of rolls in opposite directions to crush the material to be processed between them. In this type of roll crusher, the distance between the pair of rolls can be arbitrarily set according to the type of material to be processed, allowing for the production of a material of a desired size.

In this roll crusher, wear occurs on the surfaces of the pair of rolls due to prolonged processing of the workpiece. Furthermore, when processing relatively hard workpieces such as concrete, natural stone, or ore, the wear on the surfaces of the pair of rolls progresses more rapidly. If this wear on the surfaces of the pair of rolls occurs uniformly in the axial direction of the rotation axis and in the circumferential direction of the rolls, the required size of processed workpiece can be obtained by adjusting the distance between the pair of rolls.

However, if the workpiece is processed with an axial bias between the two rolls, uneven wear occurs on the surface of the two rolls, either axially or circumferentially. This uneven wear accelerates wear in that area, increasing the gap between the two rolls in that section, resulting in an unevenness and preventing the production of a workpiece of the desired size.

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 being processed, mounted around the outer circumference of the pneumatic tire.

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

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

When uneven wear occurs on a pair of rolls due to the adhesion of the material 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).

Japanese Patent Publication No. 2006-297340 Japanese Unexamined Patent Publication No. 53-34167

Typically, the rolls in 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. Consequently, 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.

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

Therefore, the objective 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.

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, for crushing a material between the pair of rolls rotated by the drive unit. The invention can adopt a configuration in which a cutting drive unit rotates the rolls at a lower rotational speed 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 abrades the surface of the rolls while the rolls are rotating due to the cutting drive unit.

This configuration allows for uniform spacing between a pair of rolls in the axial direction of the rotation axis without replacing the rolls. This is achieved by using the cutting blade of the cutting unit to remove material from the roll surface while the rolls are rotating via the cutting drive unit.

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 units are positioned outward in the direction in which the rotation axes of the pair of rolls are aligned.

This configuration allows one cutting blade to cut the surface of one of a pair of rolls, while the other cutting blade cuts the surface of the other roll. This means that, for example, if uneven wear occurs on the surface of one of the rolls, the cutting blade on the side closer to that roll can easily cut the surface of the roll.

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, where it is located away from the roll located closer to the pair.

In this configuration, the cutting movement device allows the two cutting sections to move to a cutting position when cutting the surface of the roll closest to it, and to a non-cutting position when crushing the material between the pair of rolls.

The cutting unit moving device can be configured such that the frame rotatably supports the rotation axes of the pair of rolls, has a guide rail extending along the direction in which the rotation axes of the pair of rolls are aligned, and has wheels on which the cutting unit rolls along the guide rail. The cutting unit travels between the cutting position and the non-cutting position along the guide rail via the wheels.

Each cutting section can be easily moved between the cutting position and the non-cutting position by traveling along a guide rail using the wheels of the cutting section moving device.

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

In this configuration, when the cutting section is moved to the cutting position, it is supported by the frame and fixed to the frame. The cutting section can receive the reaction force acting on it when cutting the surface of the pair of rolls with its blades.

According to this invention, the surface of the roll can be cut with the cutting blade without replacing the roll, eliminating uneven wear of the roll and maintaining a uniform spacing between the pair of rolls.

Front view showing a roll crusher according to an embodiment of this invention Plan view showing the roll crusher of the same embodiment Front view showing the state in which the surfaces of a pair of rolls of the roll crusher of the same embodiment are being machined by two cutting parts. Front view showing the first cutting section that removes the surface of one of the rolls of the roll crusher in the same embodiment. (a) A partially enlarged side view showing the first cutting section of the roll crusher of the same embodiment traveling on the first guide rail; (b) A partially enlarged side view showing the first cutting section of the roll crusher of the same embodiment supported by the frame; (c) A partially enlarged side view showing the first cutting section of the roll crusher of the same embodiment fixed to the side frame.

Embodiments of this invention will be described based on the drawings. As shown in Figures 1 and 2, the roll crusher 1 according to this embodiment comprises a rectangular 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. The material to be processed is crushed between the first roll 11 and the second roll 12. In this specification, "length direction" refers to the length direction of the frame 2, and "width direction" refers to the width direction of the frame 2.

Furthermore, the roll crusher 1 has 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. It also has 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.

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 upper part 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.

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 of their alignment (lengthwise direction). 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.

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.

As shown in Figure 2, the first roll 11 and the second roll 12 are covered by a hopper 9 (see the dashed line in Figures 1 and 2) and a cover 8 (see the 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. 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. The cover 8 is designed to be removable during roll cutting.

The first drive unit 13 and the first cutting drive unit 17 are provided on one side of the frame 2 in the width direction. The second drive unit 14 and the second cutting drive unit 18 are provided on the other side of the frame 2 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 electric motor's rotating shaft 13a to the rotating shaft 11a via a belt 13b and 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 electric motor's rotating shaft 14a to the rotating shaft 12a via a belt 14b and pulley 20.

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, for example, in the range of 100 to 120 rpm.

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 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 sprocket 22.

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 opposite in direction to the rotation of the first roll 11 and the second roll 12 during crushing, and the rotation speed is low, for example, in the range of 8 to 5 rpm.

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.

As shown in Figure 4, the frame-like body 30 comprises a rectangular base plate 30a, a pair of side plates 30b rising from both ends of the base plate 30a in the width direction, a back plate 30c positioned diagonally between the pair of side plates 30b, and a protruding plate 30d extending 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.

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 wheel 31 in the width direction to prevent it from derailing from the rail 6a. Such a first cutting section 15 has a cutting section moving device comprising the wheels 31 and the first guide rail 6.

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. A bolt 37 is screwed (not shown) through the elongated holes 36c in the flanges 36b of the box body 36 and the side plate 30b of the frame-like body 30. This allows the wheel 31 to be 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 positioned so that the tip of the positioning bolt 38, which is screwed into the protruding plate 30d of the frame-like body 30, abuts against it.

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 withdrawing it 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 places the frame-like body 30 on the side plate 5, and the frame-like body 30 is supported by the side plate 5.

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 of the slider 32 facing outward in the longitudinal direction makes surface contact with the back plate 30c of the frame-like body 30. A bearing frame 39 is fixed to the surface 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.

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. A cutting edge portion for cutting the surface of the first roll 11 is formed at the lower end of the cutting tool 34.

Furthermore, to allow the contact position of the cutting edge of the tool 34 with respect to the first roll 11 to be changed relative 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, and changing the position of this virtual line relative to the rotation center of the rotation axis 11a), as shown in Figure 5(c), a liner 41 is detachably provided between the frame-like body 30 and the side plate 5, and an elongated hole 36d extending in the longitudinal direction is provided in 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.

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. Therefore, the second cutting section 16 is given the same reference numerals as the first cutting section 15, and its structural description is omitted. Furthermore, 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 for polishing the surfaces of the first roll 11 and the second roll 12.

The roll crusher 1 of 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 performed as follows.

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. Furthermore, 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.

Then, 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 rotate 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.

In the roll crusher 1, uneven wear 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.

When 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.

Specifically, first, the power supply to the electric motor is cut off, stopping 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.

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, moving the box body 36 upward relative to the frame-like body 30. This brings the frame-like body 30 to 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 brought to a state where the frame-like body 30 is supported by the side plate 5.

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-like 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-like body 36 of the first cutting section 15 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-like body 36 and the elongated hole 5a of the side plate 5. Here, the fixing of the frame-like 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; known fastening means such as fastening bolts and nuts or tightening a vise can be used.

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 the crushing process described above, and is outward when viewed from above (see arrow b in Figure 3). Furthermore, the rotation speed is lower than that during the crushing process described above, for example, a required rotation speed within the range of 8 to 5 rpm (6.75 rpm in this embodiment).

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, in the second cutting section 16, the horizontal screw shaft 35 and vertical screw shaft 40 are rotated to cut the surface of the second roll 12.

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, thus ending the cutting operation. Afterward, 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, moving to a non-cutting position. The second cutting unit 16 also completes 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, moving to a non-cutting position.

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

Furthermore, the first cutting section 15 and the second cutting section 16 are mounted so that the box body 36, to which the wheels 31 are attached, can slide vertically relative to the frame-like body 30. 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 wheels 31 (travelable state).

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 this reaction force by fixing the frame-like 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-like body 30 and the side plate 5 without fixing the frame-like body 30 to the side plate 5.

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, allowing for easy movement between the cutting position and the non-cutting position.

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 rotates the first roll 11 and a second cutting drive unit 18 rotates the second roll 12. However, it is also possible to have only a single first cutting drive unit 17, and for both the first roll 11 and the second roll 12 to be rotated by the first cutting drive unit 17.

Furthermore, in this embodiment of the roll crusher 1, as shown in Figure 1, an example was described that includes 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. However, it is also possible to have only the first cutting section 15, and have the first cutting section 15 cut the surface of either the first roll 11 or the second roll 12. In this case, the first cutting section 15 can be moved to either the first guide rail 6 or the second guide rail 7.

1 Roll crusher 2 Frame 3 Side plate 4 End plate 5 Side plate 5a Slotted hole 6 First guide rail 7 Second guide rail 8 Cover 9 Hopper 11 First roll 11a Rotating shaft 12 Second roll 12a Rotating shaft 13 First drive unit 14 Second drive unit 15 First cutting unit 16 Second cutting unit 17 First cutting drive unit 18 Second cutting drive unit 30 Frame-shaped body 31 Wheel 32 Slider 33 Holder 34 Cutting tool (blade)
35 Horizontal screw shaft 36 Box body 36d Slotted hole 37 Bolt 38 Positioning bolt 39 Bearing frame 40 Vertical screw shaft 41 Liner 42 Bolt

Claims (5)

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 . 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 units are each provided at an outward position in the direction in which the rotation axes of the pair of rolls are aligned. 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 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. 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. The roll crusher according to claim 4, characterized in that the wheel is mounted so as to be slidable vertically relative to the cutting section, and when the wheel slides upward, the cutting section is supported by the frame, and when the wheel slides downward, the cutting section is able to travel along the guide rail.