JP3137617B2 - Crusher rotor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to plastic containers and roll paper, books and magazines, discharged from homes and business establishments,
The present invention relates to a crusher rotor for crushing small pieces of waste such as wood chips, cloth chips, fiber chips, and paper chips.

[0002]

2. Description of the Related Art In recent years, the environment surrounding waste has changed,
Following the "Recycling Resource Promotion Act"
In June 1995, the Law Concerning the Separation and Collection of Containers and Packaging and Promotion of Recycling (Container and Packaging Recycling Law) was enacted and promulgated. It is becoming difficult to landfill easily. With such a change in living environment, it has become an important issue to utilize waste plastic containers, roll paper, books and magazines, wood chips, cloth chips, fiber chips, paper chips, and the like as recycled resources. To solve the problem, attention is being paid to the development of a crusher that is efficient, durable and easy to maintain, together with waste sorting technology.

For example, as a rotor of a conventional crusher,
Some are used in a crusher 50 as shown in FIGS. The crusher 50 has a rotor disk 55 having a plurality of crushing blades 54 provided in a lower part thereof in a casing 50A having a top opening formed by a hopper 51 and a working space tapered downward. Rotor 50 having a plurality of pieces mounted around a rotation shaft 52
B is mounted so as to rotate at a relatively high speed in the direction of arrow R, and a screen 57 provided at each end with a pair of fixed blades 56 approaching the crushing blade 54 is mounted at an outlet below the rotor 50B. , The object put into the working space is crushed into small pieces until it passes through the screen 57.

[0004]

A crusher 5 as described above.
0, since the crushing blade 54 is mounted on each rotor disk 55 so as to be parallel to the axis of the rotor 50B, the crushing blade 54 is placed in front of the crushed object supported by the fixed blade 56 in the working space. As a result, crushing occurs, resulting in a large power loss, a large amount of heat generated by the crushing, and a large noise. Further, since the crushing blade 50 fixes the crushing blade 54 to the convex portion 55A of the rotor disk 55 from the rotation direction side with the push bolt 59, the head of the push bolt 59 during the crushing operation is compared with the material to be crushed. It hit at a very high speed and was often damaged. Therefore, it is very difficult to loosen and remove the push bolt 59 when replacing the crushing blade 54.

The present invention has been devised in view of the above, and the crushing blade cuts obliquely to the object to be crushed, thereby reducing the power loss and reducing the driving power. The heat generated by crushing can be reduced smoothly and noise and vibration can be reduced, and the processing capacity can be increased.
It can handle a variety of crushed objects, can crush a wide range of crushed objects from soft to hard, and can also adopt a structure that does not damage the screw means such as bolts fixing the crushing blade during crushing work. It is an object of the present invention to provide a crusher rotor that can easily be replaced.

[0006]

In order to achieve the above-mentioned object, the rotor of the crusher according to the present invention is provided below the crushing chamber inside the casing of the crusher which crushes the input crushed material. The crushing blade is constituted by a plurality of rotor disks rotatably mounted on a portion thereof, and the crushing blade fitted in a plurality of recesses around each of the rotor disks and attached by a screw means rotates the crushing work chamber. The crushing operation is performed in close proximity to the fixed blade attached to the lower part of the rotor disk. Crushing blades are mounted so as to be inclined with respect to the rotor axis, and one or two crushing blades are mounted in an inclined arrangement in the rotor width direction in the same phase in the circumferential direction as a whole.

Therefore, in the rotor of this crushing machine, the crushing blade for performing the crushing operation by approaching the fixed blade is fixed by screw means in the recess of the rotor disk so as to cut obliquely into the crushed object. Therefore, crushing resistance is reduced and power loss is reduced, driving power is correspondingly reduced, cutting is smooth, heat generated by crushing can be reduced, noise and vibration can be reduced, processing capacity can be increased, various It can handle a wide range of objects from soft to hard, and can crush objects to be crushed in a wide range.

In order to achieve the above-mentioned object, the rotor of the crusher of the present invention is rotatably mounted on a lower portion of a crushing chamber inside a casing of the crusher for crushing a charged object. The crushing blade, which is composed of a plurality of rotor disks and is fitted in a plurality of recesses around each of the rotor disks and attached by screw means, is attached to a fixed blade attached to a lower portion of the crushing operation chamber with rotation. In a configuration in which the crushing operation is performed in close proximity to each other, the recess around the rotor disk is inclined at 3 to 15 degrees with respect to the axis of the rotor when viewed from above the recess. In addition, the crushing blade has a rake angle corresponding to the inclination of the dent, and has a parallelogram shape when viewed from above.

Therefore, in the rotor of this crushing machine, the crushing blade which performs the crushing operation by approaching the fixed blade forms a parallelogram having a rake angle when viewed from above and cuts obliquely to the crushed object. As described above, the cuts are just fitted in the recesses of the rotor disk and fixed by the screw means, so that the cuts are smooth, the crush resistance is reduced, the power loss is reduced, the heat generated by the crush can be reduced, and the noise can be reduced. Along with this, the heat load of the crusher is reduced, the durability is greatly increased, the continuous operation can be ensured and the processing capacity can be increased, so that various crushed objects can be handled. Also, in the recess, the screw means such as bolts for fixing the crushing blade can be housed in the counterbore of the crushing blade, so that the screw means does not damage the crushed object from the front while performing the crushing work, In addition to easy maintenance, the screw means can be easily loosened and removed when the crushing blade is replaced.

[0010] The recess has a disk projection formed behind the rotor disk in the rotation direction. The crushing blade has a hole through which the screw means passes. The screw means can be screwed to form a screw hole for fixing the crushing blade, and the crushing blade is firmly supported in the recess by a disk protrusion behind and formed in the disk protrusion. The screw means passed through the screw hole of the crushing blade is screwed into the screw hole so that the crushing blade is firmly fixed.

The crushing blade has a counterbore hole for receiving a head of a bolt serving as the screw means at a front portion thereof, and a hole penetrating from the counterbore hole to the back surface. Then, the disk is pushed toward the projection by a push bolt of the screw means screwed into a screw hole of the disk projection and is fixed in the recess. The head of the push bolt of the screw means is a crushing blade. It is housed and protected in the counterbore, so that damage can be considerably prevented. Further, in the present invention, the peripheral portion of the rotor disk forms a groove passage of the push bolt in a concave front portion which is smoothly connected to a next forward convex portion in the disk rotation direction by a curve. .
Thus, the push bolt can be easily tightened and removed through the groove passage.

The dent has a screw hole at the bottom, the crushing blade is formed in a tapered shape expanding toward a base opposite to the cutting edge, and the screw means is connected to one end and another end. Screws opposite to each other are formed at the ends, and the crushing blade is provided with the screw means in the screw holes by a wedge having a screw hole that is opposite to the screw of the screw hole at the bottom in the recess. It can be configured to be fixed by screwing, and the crushing blade can be stably fixed and held by the wedge by screwing screw means having opposite hands at both ends into the screw hole at the bottom and the wedge screw hole. And can sufficiently counteract the centrifugal force caused by the rotation of the rotor, and can also flexibly cope with changes in the position of the cutting edge caused by grinding of the crushing blade by adjusting the amount of tightening of the wedge. Removal becomes easy.

The rotor disk may be provided with through holes or through screw holes parallel to the axis of the rotor at a plurality of positions on the side surface, and each rotor disk may be threaded through a through hole or through screw hole with a nut. By tightening, the rotor can be firmly integrated.

The dents of the rotor disk are slightly shifted in the circumferential direction for each rotor disk connected to each other, and the crushing blades are fixed in an inverted V-shaped arrangement or in an almost inverted V-shaped arrangement. The number of crushing blades that are simultaneously cut into the crushed object is reduced, the cutting timing of the crushing blades is sequentially shifted to level the crushing power consumption in one rotation, and the crushing load on the rotor is reduced from the center to both ends. To make the load distribution uniform so that
Prevent uneven distortion.

The crushing blade may have a screw hole for screwing a jack bolt on the bottom surface thereof, and a change in the position of the cutting edge caused by grinding of the crushing blade can be easily corrected by the jack bolt.

The rotor may be covered over a substantially half circumference by a screen removably mounted on a screen holder rotatably supported on the rotor so as to be detachable from the rotor, and is removably mounted on the screen holder. With the screen, a cut piece having a size equal to or less than a certain size can be obtained over substantially half a circumference. Further, it is possible to easily perform the screen change of the size change and the wear screen change with respect to the screen holder which is turned and separated.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a crusher according to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a crusher equipped with a rotor according to a representative embodiment of the present invention, and FIG.
FIG. 3 is a front view of one continuous cutting arrangement in the same phase of an inverted V shape of the same rotor, and FIG. 4 is a front view of two continuous cutting arrangements in the same phase of the same rotor. FIG. 5 is a front view of one continuous cutting arrangement, FIG. 5 is a side view of an example of a rotor disk on the left side from the center of the rotor in FIGS. 2 to 4, FIG. 6 is a view from arrow Y1 in FIG. 5, and FIG. 7 is a side view of the rotor disk corresponding to the above example from the center to the right side of the rotor in FIG. 4, and FIG.
9 is a view showing a crushing blade mounted on a rotor disk on the left side from the center of the rotor in FIGS. 2 to 4, (a) is a front view, (b) is a side view, (C)
10 is a plan view, FIG. 10 shows a crushing blade mounting portion of the rotor disk of the rotor of another embodiment, (a) is a side view of the crushing blade mounting portion, and (b) is a plan view of the crushing blade mounting portion. FIG. 3C is a side view showing a state at the start of wedge fixation and at the completion of fixation release in the crushing blade mounting portion.

In FIG. 1, a crusher 1 equipped with a rotor 10 of the crusher according to the present invention is called a so-called rotor press crusher, and is sorted and put together in a plastic container, roll paper, book, or the like. The rotor 10 is rotatably mounted horizontally below the crushing operation chamber 2 for crushing input materials such as magazines, wood chips, cloth chips, fiber chips, and paper chips.
And a plurality of crushing blades 20 provided around the rotor 10 in the axial direction and the circumferential direction are provided at the lower discharge port 3 of the crushing work chamber 2A of the casing 2 with the rotation of the rotor to the arrow R1.
The crushing operation is performed by approaching the fixed blades 30 and 30 attached to the crusher. The material to be crushed is slowly pushed toward the rotor 10 by the pusher 7 reciprocally driven by the hydraulic cylinder 6. The crushed cuttings are subjected to particle size sorting by a screen 40 covering the rotor 10 at the lower outlet 3 over substantially half a circumference.

As shown in FIGS. 1 to 8, the rotor 10 locks a plurality of, for example, ten, rotor disks 11 to the rotating shaft 13 by a key, and inserts a screw hole 11A formed in the disk 11 from both sides. The lock screw rods are integrated by screwing and tightening. The rotor disk 11 is
Blade mounting dents 15 in three places at intervals of 120 degrees, for example.
Is formed obliquely corresponding to the crushing blade rake angle α, and the convex portion 16 is formed behind the recess 15 in the rotation direction R1.
The front side of the recess 15 in the rotation direction R1 is lower, and is smoothly connected to the next convex part 16 in the rotation direction R1 by a curve. A groove passage 16A and a screw hole 16B of a pair of left and right crushing blade fixing push bolts are formed from the lower front side to the convex portion 16.

The position of the keyway 12 is selected according to the arrangement of the crushing blades. In the case where the crushing blade 20 having a rake angle α of 7 degrees is employed, for example, as shown in FIG. As shown by the groove center lines A to G and A 'to G', the key grooves 12 are formed so as to be sequentially shifted by three degrees in the rotation direction R1, and as shown in FIG.
In the rotor 10 having two temporary cutting arrangements in the same phase in shape, the keyway center lines H to K and H 'to in FIGS.
As shown by K ', the key grooves 12 are formed so as to be sequentially shifted by 24 degrees in the rotation direction R1. The oblique directions of the crushing blades 20 at both ends are reversed in order to bring the crushed material inward. The crushing blade array of FIG. 3 is one continuous cutting array in the same phase of the inverted V shape, and the cutting edge position is alternately located right and left from the center in the width direction of the rotor 10 and alternately left and right during the crushing operation. The crushing blades 20 are cut one by one. In addition to the above arrangement of the inverted V shape, a random arrangement,
There is a right-sloping or left-sloping arrangement such as the right or left side from the center of the inverted V shape.

As shown in FIG. 9, the crushing blade 20 approaches the fixed blade 30 at an angle, and has a rake angle α for cutting the object to be crushed obliquely, and an oblique dent corresponding to the rake angle α. A parallelogram is formed in a plan view so as to just fit in the reference numeral 15. The scooping angle of the cutting edge 21 is less than 90 degrees in order to obtain the clearance angle β, but is usually a large angle of, for example, about 80 degrees in order to increase durability. A pair of left and right crushing blade fixing holes 22 are formed corresponding to the screw holes 16B of the convex portion 16. The crushing blade fixing hole 22 has a vertically long oval shape for correcting the position of the crushing blade by polishing, and includes a counterbore hole 22A for supporting a head of a hexagon socket head push bolt and a through hole 22B. Have been. A screw hole 2 for a pair of left and right jack bolts JB is provided at the bottom of the crushing blade 20.
3 are formed, and the cutting edge 21 is a jack bolt JB.
Thus, it is corrected as needed so as to be positioned in the circle C1 in FIGS.

Next, another embodiment of the rotor disk 11 'will be described.
As shown in FIG. 10, blade mounting recesses 15 'are formed obliquely corresponding to the crushing blade rake angle at three locations at intervals of, for example, 120 degrees in the peripheral portion, and convex portions are provided behind the recesses 15' in the rotation direction. 16 '. The front side of the recess 15 'in the rotation direction R1 is low, and is smoothly connected to the next front projection 16' in the rotation direction R1 by a curve. Dent 15 '
Has a deep rear recess 15A 'and a shallow front recess 15B' which are tapered toward the center of the rotor disk 11 'as a whole. Shallow front dent 15
A screw hole 15C 'for a normal right-hand screw is formed at the bottom of B'. On the other hand, the crushing blade 20 ′ is formed in a tapered shape in which the base 24 opposite to the cutting edge 21 ′ is expanded, and
Is pressed from the outside toward the inside.

The screw means 18 for fixing the crushing blade is formed with opposite screws at one end and the other end. Specifically, the screw means 15 is a right-hand screw hole 15 at the bottom of the shallow front recess 15B '.
C ′ is screwed into the inner end 18A and the crushing blade 2
A left-hand screw screwed into a left-hand screw hole 17C 'formed in the wedge 17 for holding 0' is a hexagon socket screw 18 formed in each of the outer end portions 18B. The wedge 17 is provided with the recess 15 ′.
The inner end is thinner and the outer end is thicker so as to form a composite taper formed by the taper of the crushing blade 20 ′ and the left end of the outer end 18B of the screw 18 on the inner end. A matching left screw hole 17B is formed, and a hole 17A for inserting a hexagon wrench T for turning the screw 18 is formed on the outer end side.

At the start of fixing the crushing blade 20 ', FIG.
As shown in (c), the left-hand screw of the outer end 18B of the screw 18 is slightly screwed into the screw hole 17B on the inner end of the wedge 17, and then the right-hand screw of the inner end 18A of the screw 18 is set to the above-mentioned position. Screw it into the right screw hole 15C 'at the bottom of the shallow front recess 15B'. Wedge 1
When the right screw 18A of the screw 18 is screwed forward using the hexagon wrench T inserted from the hole 17A of the No. 7, the left screw 18B pulls in the wedge 17, and the crushing blade 20 'as shown in FIG. Is fixed, and the crushing blade 20 'can be stably fixed and held by the wedge 17 against the centrifugal force due to the rotation of the rotor. Further, the change in the position of the cutting edge due to the grinding of the crushing blade 20 'is corrected by the jack screw JB, but the correction can be flexibly dealt with by reducing the pulling down of the wedge 17. Further, the fixing and crushing blade can be easily removed by the jack action of the reverse screw.

Referring again to FIG. 1, a pair of fixed blades 30
Are fixed to the partition of the outlet 3 of the casing 2 at both ends of the screen 40. These fixed blades 3
A screen 40 is provided so as to straddle 0 and 30 and to cover substantially half the circumference of the rotor 10 in a state of approaching the blade edge of the rotor crushing blade 20. The screen 40 is exchangeably attached to a screen holder 45 for changing the particle size. The screen holder 45 is pivotally supported at one end so as to be detachable from and attached to the rotor 10, and has a nut 4 at the other end.
6 is fixed to the lock bolt 47.

[0026]

The rotor of the crusher according to the present invention is composed of a plurality of rotor disks rotatably mounted below the crushing chamber inside the casing of the crusher for crushing the material to be crushed. A crushing blade fitted to a plurality of recesses around each rotor disk and attached by screw means approaches and cooperates with a fixed blade attached to a lower portion of the crushing work chamber with rotation. The peripheral portion of the rotor disk is mounted with a crushing blade that is inclined with respect to the rotor axis so as to approach the fixed blade one after another for a while. And one or two at the same phase in the circumferential direction as a whole.
Since the crushing blades are mounted in an inclined array in the width direction of the rotor, the crushing blade that performs crushing work in close proximity to the fixed blade is positioned in the recess of the rotor disk so as to cut diagonally to the crushed object. Since it is fixed by screw means, crushing resistance is reduced and power loss is reduced, driving power is reduced by that much, cutting is smooth, heat generated by crushing can be reduced, noise and vibration can be reduced, processing capacity And can handle various objects to be crushed, and can crush a wide range of objects from soft to hard.

In the rotor of the crusher according to the present invention, the dent at the periphery of the rotor disk is inclined at 3 to 15 degrees with respect to the axis of the rotor as viewed from above the dent, and the crushing blade is Has a rake angle corresponding to the inclination of the dent, and is characterized by forming a parallelogram when viewed from above, so the crushing blade that performs crushing work close to the fixed blade, When viewed from above, it forms a parallelogram with a rake angle and is cut into the object to be crushed at an angle, just fits in the recess of the rotor disk and is fixed by screw means, so the cut is smooth and crush resistance Reduces the power loss and reduces the heat generated by the crushing,
Also, noise can be reduced.

Accordingly, the heat load of the crusher is reduced, the durability is greatly increased, the continuous operation can be ensured, the processing capacity can be increased, and various crushed objects can be handled. Also, in the recess, the screw means such as bolts for fixing the crushing blade can be housed in the counterbore of the crushing blade, so that the screw means does not damage the crushed object from the front while performing the crushing work, In addition to easy maintenance, the screw means can be easily loosened and removed when the crushing blade is replaced.

The dent has a disk projection formed behind the rotor disk in the rotation direction. The crushing blade has a hole through which the screw means passes. Since the screw means is screwed to form a screw hole for fixing the crushing blade, the crushing blade is firmly supported by the disk convex portion behind in the recess, and is formed in the disk convex portion. The screw means passed through the screw hole of the crushing blade is screwed into the screw hole so that the crushing blade is firmly fixed.

The crushing blade has a counterbore hole for receiving the head of the bolt serving as the screw means at a front portion thereof, and a hole penetrating from the counterbore hole to the back surface. Then, the push bolt of the screw means screwed into the screw hole of the disk convex part is pushed toward the convex part and is fixed in the recess. It is housed and protected in a counterbore and can significantly prevent damage.

The dent has a screw hole at the bottom thereof, the crushing blade is formed in a tapered shape expanding toward the base opposite to the cutting edge, and the screw means is connected to one end and another end. Screws opposite to each other are formed at the ends, and the crushing blade is provided with the screw means in the screw holes by a wedge having a screw hole that is opposite to the screw of the screw hole at the bottom in the recess. Since the screw is fixed by screwing, screw means having opposite screws at both ends are screwed into the screw hole and the wedge screw hole at the recessed bottom, so that the crushing blade can be stably fixed and held by the wedge. It can sufficiently counteract the centrifugal force caused by the rotation of the rotor, and can flexibly cope with changes in the cutting edge position caused by grinding of the crushing blade by adjusting the wedge tightening. Also become easier.

Since the rotor disk has through holes or through-screw holes parallel to the axis of the rotor at a plurality of positions on the side surface, each rotor disk is threaded through a through-hole or through-screw hole with a nut. By tightening, the rotor can be firmly integrated.

The crushing blades are fixed in an inverted V-shaped arrangement or in a substantially inverted V-shaped arrangement, with the recesses of the rotor disk slightly shifted in the circumferential direction for each rotor disk connected to each other. The number of crushing blades that are simultaneously cut into the crushed object is reduced, the cutting timing of the crushing blades is sequentially shifted to level the crushing power consumption in one rotation, and the crushing load on the rotor is reduced from the center to both ends. To make the load distribution uniform so that
Prevent uneven distortion.

Since the crushing blade has a screw hole for screwing a jack bolt on the bottom surface thereof, it is possible to easily correct the change of the cutting edge position due to the grinding of the crushing blade by the jack bolt.

The rotor is exchangeably mounted on the screen holder because it is covered over a substantially half circumference by a screen that is exchangeably mounted on a screen holder that is pivotally supported so as to be detachable from the rotor. With the screen, it is possible to obtain a cut piece having a certain size or less over substantially half a circumference. Further, it is possible to easily perform the screen change of the size change and the wear screen change with respect to the screen holder which is turned and separated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a crusher equipped with a rotor of a representative embodiment according to the present invention.

FIG. 2 is a front view of two temporary cutting arrangements in the same phase of an inverted V shape of the rotor.

FIG. 3 is a front view of one continuous cutting arrangement in the same phase of the inverted V shape of the rotor.

FIG. 4 is a front view of two continuous cutting arrangements in the same phase of the inverted V shape of the same rotor.

FIG. 5 is a side view of an example rotor disk on the left side from the center of the rotor in FIGS. 2 to 4;

FIG. 6 is a view from arrow Y1 in FIG. 5;

FIG. 7 is a side view of a rotor disk corresponding to the above example from the center to the right side of the rotor in FIGS. 2 to 4;

FIG. 8 is a view from arrow Y3 in FIG. 7;

9A and 9B are views showing a crushing blade mounted on a rotor disk on the left side from the center of the rotor in FIGS. 2 to 4, wherein FIG. 9A is a front view, FIG. 9B is a side view, and FIG. FIG.

10A and 10B show a crushing blade mounting portion of a rotor disk of a rotor according to another embodiment, FIG. 10A is a side view of the crushing blade mounting portion, FIG. 10B is a plan view of the crushing blade mounting portion,
(C) is a side view which shows the state at the time of the start of fixing of the wedge in the crushing blade mounting part, and at the time of completion of fixing release.

FIG. 11 is a longitudinal side view of a crusher equipped with a conventional rotor.

FIG. 12 is a vertical sectional front view of the crusher.

[Description of Signs] 1 Crusher 2 Casing 2A Crushing chamber 10 Rotor 11, 11 'Rotor disk 11A Through hole or through screw hole 15, 15' Depression 15C, 15C 'Screw hole 16, 16' Convex portion 16B Convex portion Screw hole 17 Wedge 17B Screw hole of wedge 18 Screw means (push bolt) 18 'Screw means 18A' Screw at one end (right screw) 18B 'Screw at the other end (left screw) 20, 20' Crush blade 21, 21 '' Blade edge 22 Hole through which screw means 22A Counterbore hole 22B Through hole 23 Screw hole of jack bolt 30 Fixed blade 40 Screen 45 Screen holder α Rake angle JB Jack bolt

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B02C 18/00-18/44

Claims (2)

(57) [Claims] 1. A crusher for crushing an input crushed object comprises a plurality of rotor disks rotatably mounted at a lower portion of a crushing chamber inside a casing of the crusher. The crushing blade attached by the push bolt of the screw means which is fitted into the plurality of recesses around the periphery and is screwed into the screw hole of the disk projection formed behind the recess in the disk rotation direction with the rotation A rotor for a crushing machine configured to perform crushing work in cooperation with a fixed blade attached to a lower portion of the crushing work chamber, wherein the crushing blade has a rake angle corresponding to an inclination of the recess. Having a parallelogram when viewed from above, each of which is mounted in the recess in an inclined arrangement that is at an angle to the fixed blade and approaches one after another for a while, and the crushing blade is On its front The push bolt having a counterbore hole for accommodating the head of the push bolt and a hole penetrating from the counterbore hole to the back surface, being inserted into the through hole and screwed into the screw hole of the disk convex portion. Is pressed toward the convex portion and is fixed in the concave portion. The peripheral portion of the rotor disk has a concave front portion which is smoothly connected to the next forward convex portion in the disk rotation direction by a curve. A crusher rotor, wherein a groove passage for passing a push bolt for fixing the crushing blade is formed. 2. The crusher rotor according to claim 1, wherein the rotor disk has through holes or through screw holes parallel to the axis of the rotor at a plurality of positions on the side surface.