JPH09959A - Crusher - Google Patents

Abstract

PURPOSE: To provide a crusher equipped with crushing blades which are easily disassembled, removed and restored when replaced and keep high rigidity almost equal to that of those of solid type even when they are of split type. CONSTITUTION: In this crusher, on at least one rotating shaft 20 allowed to rotary driving in a casing having almost parallelopiped shape, crushing blade rotors are provided at intervals in the axial direction so as to be overlapped with crushing blade of the other shaft adjacent to the shaft 20 or fixed blades mounted in the cashing. A crushing blade rotor 25 is constituted of crushing blades 26 which are at least bi-sected and connected and fixed to each other and spaces 30 which are mounted between the shaft 20 and the crushing blade 6 and is at least bi-sected and connected and fixed to each other. The crushing blade 26 is provided projectingly at the shoulder part thereof so as to surround the rotating shaft 20 at least from one side face. The spacer 30 forms projecting parts 31A, 31A' which are abutted on the shoulder part from the outside when the space is connected and fixed to the side face corresponding to the projecting side face of the shoulder part of the crushing blade 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher suitable for shearing and crushing bulky refuse such as beds, refrigerators, drums, car bodies, tires, and wood.

[0002]

2. Description of the Related Art Conventionally, as a crusher of this type, FIG. 11 shows a state in which two crushing shafts which are rotationally driven at a non-constant speed so as to bite from top to bottom overlap with each other. Separately the mono-cutter or piece cutter as shown,
Also, there is a case in which an integral support scraper having an arcuate portion adjacent to the circular portion of the rotating shaft between the cutters is fixed to each side wall of the casing individually by using bolt holes in the side wall.

[0003]

However, in the crusher for crushing by such a shearing action, since the shear crushing work is performed between the both side edge edges of the blades which overlap the object to be processed, the side edge edge of the blade is Wear is large. Therefore, the blades need to be replaced relatively frequently, and the mono-cutter and piece cutter as described above must be hard and rich in toughness, resulting in very high replacement cost. That is, the monocutter lifts the rotary shaft at the time of replacement and pulls it out from one side, but if it is operated for a long time, rust may occur, the shaft may be twisted or distorted, and it is very difficult to pull out. there were. In addition, the problem that the piece cutter has a large number of divisions makes it difficult to maintain the rigidity as a unitary body, and it is difficult to disassemble and restore due to rust and distortion when replacing a damaged part after long-term operation. is there.

The crusher of the present invention eliminates the above-mentioned conventional inconvenience, and when replacing a crushing blade having a reduced crushing ability after long-term operation, it can be easily disassembled, removed and restored without lifting the rotary shaft, Another object is to obtain a crusher equipped with a crushing blade that can maintain a high rigidity close to that of a unitary type.

[0005]

In order to achieve the above object, a crusher according to claim 1 of the present invention has an opening for inputting an object to be treated and an outlet for an object to be crushed below. A substantially rectangular parallelepiped casing, at least one rotary shaft that is driven to rotate in the casing, another shaft adjacent to the shaft, or a fixed blade mounted in the casing, and In a crusher comprising a crushing blade rotor axially separated from the rotating shaft so as to wrap, the crushing blade rotor is divided into at least two crushing blades, and the crushing blades are connected and fixed to each other, and the crushing blade. And a spacer which is mounted at least between two and which is divided and connected and fixed to each other. The crushing blade has a shoulder portion projecting from at least one side surface so as to surround the rotary shaft,
The spacer is characterized in that the side surface corresponding to the protruding side surface of the shoulder portion of the crushing blade is formed with a protruding portion that comes into contact with the shoulder portion from the outside when being connected and fixed.

In the crusher according to the second aspect of the invention, the crushing blade is divided into two parts symmetrically with respect to the center line, and the spacer is divided into two parts symmetrically with respect to the center line. In the crushing machine according to claim 3, the crushing blade has key grooves with respect to the rotary shaft formed at the divided blades divided into two at a position of 45 degrees from the symmetry center line, and the spacer is A key groove for the rotation axis is formed on each of the two divided pieces at a position of 45 degrees from the symmetry center line or at a position of the symmetry center line.

In the crusher according to the fourth aspect of the present invention, the crushing blade and the spacer are fixed to the rotary shaft with their respective dividing symmetry center lines displaced by 90 degrees in the circumferential direction.
In the crusher according to a fifth aspect of the present invention, the crushing blade is fixed by fitting a replaceable blade on a hook-shaped portion around the crushing blade. In the crusher according to a sixth aspect of the present invention, the crushing blade is locked by the inner peripheral surface corresponding to the rotary shaft through the polygonal outer peripheral surface in each of the two divided blades.

[0008]

In the crusher according to the first aspect of the present invention, a casing having a substantially rectangular parallelepiped shape having an opening for inputting the object to be treated and an outlet for the crushed material in the lower part, and in the casing At least one rotary shaft that is rotationally driven and one that is adjacent to the rotary shaft, or is axially separated from the rotary shaft so as to mutually overlap with a fixed blade mounted inside the casing. The object to be treated, which is made up of a crushing blade rotor that has been put into the casing through the charging opening, is meshed with the crushing blade rotors of the rotating shaft that is rotationally driven or at the portions where the fixed blades overlap each other. It is crushed and discharged from the discharge port.

The crushing blade rotor is composed of at least two crushing blades which are connected and fixed to each other, and a spacer which is mounted between the crushing blades and is divided into at least two and which is fixedly connected to each other. The crushing blade has a shoulder portion protruding from at least one side surface so as to surround the rotary shaft,
When the spacer is disassembled and removed from the rotary shaft, since the spacer forms a protruding portion that abuts the shoulder portion from the outside when connected and fixed to the side surface corresponding to the protruding side surface of the shoulder portion of the crushing blade. , The shoulder protruding from the side surface of the crushing blade can be disassembled and removed first by the dividing surface, and then the spacer, which is in contact with the protruding portion from the outside, can be disassembled by the dividing surface and removed. The rotor can be disassembled and removed without having to lift it from the casing. In addition, it can be easily disassembled and removed without being significantly affected by rust or distortion of the rotating shaft after long-term operation. When recovering, assemble the divided crushing blades around the rotating shaft that is still mounted in the casing, connect and fix it,
The spacers can be connected and fixed so that the shoulders of the side surfaces are abutted and pressed from the outside by the protruding portions of the split spacers, and the rigidity reduction due to splitting can be compensated.

In the crusher according to the second aspect, the crushing blade is divided into two parts symmetrically with respect to the center line, and the spacer is divided into two parts symmetrically with respect to the center line. , It is possible to minimize disintegration with minimum division and enable easy disassembly / removal and restoration. Also, it is possible to give compatibility to the division pieces and reduce maintenance cost.

In the crusher according to the third aspect of the present invention, the crushing blade has the two divided blades each having a key groove with respect to the rotary shaft at a position of 45 degrees from the center line of symmetry, and the spacer is , Each of the two divided pieces is formed with a key groove for the rotation axis at a position of 45 degrees from the symmetry center line or at a position of the symmetry center line. The dividing surface of the crushing blade and the dividing surface of the spacer can be offset by 90 degrees to minimize the reduction in rigidity of the crushing blade.

In the crusher according to a fourth aspect of the present invention, the crushing blade and the spacer are fixed to the rotary shaft by shifting the respective dividing symmetry center lines thereof in the circumferential direction by 90 degrees, and thus the crushing blade is fixed. It is possible to minimize the decrease in rigidity. In the crushing machine according to claim 5, the crushing blade has a replaceable blade fitted and fixed to a hook-shaped portion around the crushing blade, so that the crushing blade is partially worn or damaged. In this case, re-operation is possible with minimal maintenance work. In the crushing machine according to claim 6, the crushing blade is locked at the inner peripheral surface corresponding to the rotary shaft through the polygonal outer peripheral surface in each of the two divided blades. The crushing blade and the rotary shaft can be locked without using, and the degree of freedom in adjusting the position of the crushing blade is increased especially in the case of a regular polygonal shape.

Next, a shear crusher as a typical embodiment of the crusher of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view of the shear crusher of the present invention, FIG. 2 is a right side view of the crusher, FIG. 3 is a horizontal sectional view of a main part of the crusher, and FIG.
5 is a sectional view taken along line IV-IV in FIG. 5, FIG. 5 is a side view of a rotor having four-hook crushing blades, FIG. 6 is a partial front view of the rotor, and FIG. 7 is an assembly of a rotor having six-hook crushing blades. FIG. 9 is a side view, FIG. 8 is a partial front view of the rotor, and FIG.
Shows an assembly of a rotor composed of a 6-hook crushing blade having a replaceable blade fixed to a hook-shaped portion, (a) is a side view thereof, (b) is a plan view and a front view of the replaceable blade, (c).
FIG. 4A is a plan view and a partial side view of the hook-shaped portion.

1 to 6, a bed, a refrigerator,
A shear crusher 1 that cuts coarse dust such as drums, car bodies, tires, and wood into pieces and cuts the pieces into pieces is a substantially rectangular parallelepiped casing having an opening 11 for the input of bulk refuse and an outlet 12 for the pieces. 10, two rotary shafts 20 and 20 that are rotatably driven at a non-constant speed so as to be bitten from the top to the bottom in the casing 10 as shown by arrows R1 and R2, and each shaft 2
No. 0 blade-mounted rotors 25 mounted in the longitudinal direction so as to overlap each other, and the casing 1
The longitudinal members 41, 41 fixed to the inside of each side wall 15, 15 parallel to the shaft 20 are engaged with the longitudinal members 41 from above and below and are coupled to each other by the tie bolts B1 and of the rotor 25. The support scrapers 45 and 46 are provided with an arcuate portion 48 adjacent to the spacer 30, and the rotary driving devices 50 and 50 of the shafts 20 and 20 are provided.

In the casing 10, a hopper 11a is connected to the charging opening 11, and a discharging chute 12 is connected to the discharging port 12.
a is mounted on the gantry 5 to connect the a, and a reinforcing rib 15 a is fixed to the outer surface of the side wall 15. The upper beams of the end walls 16 and 16 and the retainer of the bearing B are detached so that the rotary shafts 20 and 20 can be lifted upward for inspection and maintenance. It is assembled to be durable.

The rotating shaft 20 has a circular cross section having two key grooves 24 at every 180 degrees on its peripheral surface, and a bearing portion 20a and a crushing blade of the rotor 25 are provided from the outside to the reduced diameter cylindrical portion at the end. 26 and the spacer 30 are formed to overlap with the flange 20c on the input side and tighten the nuts N and N to screw together. The input side also has a bearing 20d outside the flange 20c. One axis 2
0 has an input part on the left side and the other shaft 20 has an input part on the right side, and the crushing blades 26 of the rotor 25 are arranged in exactly the same arrangement.
... and color 30 ... can be assembled,
Easy to assemble and maintain. The rotation shaft 20 has a polygonal cross section, such as a regular hexagon, instead of the circular cross section having the key groove 24 inside the casing.
The engaging hole of (1) can also have the same polygonal cross section, and the diameter-reduced cylindrical portion at the end can have the same configuration as above.

Each crushing blade rotor 25 is connected to the other rotary shaft 20.
The crushing blade is composed of a hook-shaped crushing blade 26 and a spacer 30, which are positioned with the key K on the rotating shaft 20 so as to be staggered in the axial direction so as to perform a shearing action during rotation. The spacers 26 are attached to the rotary shaft 20 with a spacer 30 slightly wider than the spacers 26. The crushing blade 26 has four hook-shaped portions 26A formed every 90 degrees and is divided into two along the center line L so as to be point-symmetric with respect to the center of the rotating shaft 20. Therefore, the divided crushing blade pieces 27 have the same shape. Further, a connecting hole 26C and a screw hole 26D are formed in a direction orthogonal to the center line L from the peripheral surface 26B other than the hook-shaped portion 26A, and the split crushing blade piece 27 becomes an integrated crushing blade 26 by the connecting bolt 28. Fixed by connection.

The spacer 30 is divided into two parts in line symmetry with respect to a center line L'which is orthogonal to the center line L, and the connecting hole 3 is formed in a direction perpendicular to the center line L'from its peripheral surface 30B.
0C on both ends of the divided spacer piece 31 and screw holes 30
D is formed at both ends of the divided spacer piece 31 ', and the divided spacer pieces 31, 31' are connected and fixed to the integrated spacer 30 by the connecting bolt 32. In this case, the heads of the connecting bolts 32 face in the same direction, and the tightening work is efficient. Similarly to the crushing blade 26, the spacer 30 also has a center line L ′ so as to be point-symmetric with respect to the center of the rotating shaft 20.
It is also possible to divide it into two parts along the line, and it is possible to give compatibility to the divided pieces and reduce the maintenance cost.

Further, the divided crushing blade piece 27 has shoulder portions 27A projecting from both side surfaces so as to surround the rotary shaft 20,
The spacer 30 corresponds to the shoulder portion 27A of the crushing blade piece 27 and projects from the outside to the shoulder portion 27A so as to come into contact with the shoulder portion 27A.
Since A'is formed, when the crushing blade 26 is disassembled from the rotary shaft 20 and removed, the shoulder portion 27A projecting from the side surface of the crushing blade piece 27 is abutted by the protrusions 31A and 31A 'from the outside. The contacting spacer 30 can be first disassembled and removed on the dividing surface, and then the crushing blade 26 can be disassembled and removed on the dividing surface. Therefore, the rotor 25 can be disassembled and removed without lifting the rotary shaft 20 from the casing 10, and the rotor 25 can be easily disassembled and removed without being significantly affected by rust or distortion of the rotary shaft 20 after long-term operation. . At the time of restoration, the divided crushing blade pieces 27 are assembled and connected and fixed around the rotary shaft 20 that is still mounted on the casing 10, and the shoulder portion 27A on the side surface thereof is protruded portions 31A and 31A 'of the divided spacer pieces.
Spacer piece 31, so that it abuts and presses from outside
31 'can be connected and fixed to compensate for the decrease in rigidity due to division.

The split crushing blade piece 27 has a key groove 29 with respect to the rotary shaft 20 formed at a position of 45 degrees from the split surface at the front end in the rotation direction, and the split spacer pieces 31, 31 'are
Since the key groove 34 for the rotary shaft 20 is formed at a position of 45 degrees from the split surface at the rear end in the rotation direction, the split crushing blade pieces 27 are made compatible with each other to reduce the maintenance cost,
It is possible to shift the dividing surface of the crushing blade 26 and the dividing surface of the spacer 30 by 90 degrees to minimize the decrease in the rigidity of the crushing blade 26.

The stringer 41 has a cross section having locking projections 41a and 41b protruding vertically inside, and supports the support scrapers 45 and 46, which are slightly narrower than the spacer 30, into the locking portions 45a and 41a. 46a is fitted so as to be slidable in the longitudinal direction. Positioning of the support scrapers 45 and 46 is performed by fastening with tie bolts B1 and B1. The lower scraper 46 has a support bar 4 at the lower end.
9 is further supported by 9 and serves to scrape off debris that has adhered to the blades 31, 35, and, in cooperation with the upper scraper 45, spacers at the bearing arcs 48 formed by their inner ends. The rotation shafts 20 and 20 are prevented from being deformed to the outside through a large load (a gap of about 1 to 2 mm is formed with respect to the spacer 30 at the time of a small load). Since the scrapers 45 and 46 are divided into two, they can be easily assembled and disassembled, and the position can be easily adjusted according to the width change of the blade 26.

The rotary drive device 50 includes the rotary shafts 20 and 20.
Each of them is provided outside the left and right end walls 16 of the casing 10 and has a rotational speed difference of about 10 to 30 r. p. m. It is driven to rotate at the speed of
Reversible motors 51, 51 installed at the bottom of the gantry 5.
, Power transmission means 52 such as a chain, and a speed reducer 5
3, 53, and the input part 2 of the rotary shafts 20, 20 on the output shaft.
The control unit is also provided with an overload detecting means that reverses a few rotations when an overload occurs. Although shearing can be performed by rotating at a constant speed, the shearing efficiency of the one having the above speed difference is good. The shearing action increases as the difference between the rotational speeds of the two shafts 20, 20 increases. However, if the difference is too large, the efficiency of the crushing treatment decreases. Therefore, a difference in speed of about 25% is desirable.

The four hook-shaped portions 26A are replaced with the crushing blades 26 formed every 90 degrees, and six hook-shaped portions 26A 'are formed every 60 degrees as shown in FIGS. 7 and 8. The crushing blade 26 ′ can be used, and is composed of divided crushing blade pieces 27 ′ of the same shape that are halved along the center line L so as to be point-symmetrical with respect to the center of the rotary shaft 20. Also,
The center line L from the peripheral surface 26B 'other than the hook-shaped portion 26A'
A connecting hole 26C 'and a screw hole 26D' are formed in a direction orthogonal to the above, and the divided crushing blade pieces 27 'are connected and fixed to the integrated crushing blade 26' by a connecting bolt 28 '. The keyway 29 'is located in the center. The structure and operation of the shoulder 27A 'are the same as those of the above-mentioned 27A. As the number of hook-shaped parts for crushing is large, crushing efficiency is good.

Spacer 30 'used for the crushing blade 26'
Is divided into two parts in line symmetry with respect to a center line L'which is orthogonal to the center line L, and the connecting hole 30C 'is divided from the peripheral surface 30B' in a direction orthogonal to the center line L '. Of the divided spacer pieces 35 'and the screw holes 30D' are formed at both ends of the divided spacer pieces 35 '.
It is connected and fixed to 0 '. Spacer 30 'is also a crushing blade 2
Similarly to 6, it may be divided into two along the center line L ′ so as to be point-symmetric with respect to the center of the rotation shaft 20. The keyway 34 'is 1 / on both ends of the split spacer pieces 35, 35'.
It is divided into two parts. Projections 35A, 35A '
Has the same structure and function as those of 31A and 31A ′ described above.

Instead of the above-mentioned crushing blades 26, 26 ', as shown in FIG. 9, crushing is performed by fitting a replaceable blade C having a rectangular parallelepiped shape to six hook-shaped portions 26A "and fixing them with bolts. The blade 26 ″ can be used, and if the blade C is partially worn or damaged, it can be restarted with a minimum of maintenance work. In each hook-shaped portion 26A ″, a sealing wax projection portion 37 for fitting and fixing the blade C is formed, and a sealing wax groove 37 ′ for fitting the sealing wax projection portion 37 is formed in the bottom of the blade C. .
Shattering blade 26 "shoulder 27A" and other configurations and spacers 3
The protrusions 36A, 36A 'of 0 "and other configurations are the same as those of the crushing blade 26' and the spacer 30 '.

In the above embodiment, the crushing blades 26, 26 ', 2
The 6 "and the spacers 30, 30 ', 30" are fixed to the rotary shaft 20 so that the divided surfaces are orthogonal to each other at 90 degrees.
It may be in the range of degrees to 135 degrees. The division may also be unequal division. As shown in FIG.
It is also possible to fix the additional blade 38 such as. Again blade 2
The front and rear edges of C and C can be chamfered so that they do not collide strongly with the blades 26 and C of the opposing shaft when they overlap, even if they are misaligned. On the bottom of the casing 10, a plurality of grids adjacent to the cutting edge arc of the blade 26 may be provided in combination with a plurality of juxtaposed longitudinal horns and a transverse partition plate. Further, the rotary drive device 50 includes the casing 10
One may be provided outside the one end wall 16 and the respective rotary shafts 20 and 20 may be coupled to the two output shafts having different speeds of the speed reducer. Further, it is also possible to adopt a configuration in which a crushing blade rotor is arranged on one rotary shaft and performs shear crushing action with a fixed blade.

[0027]

As described above, according to the crusher according to the first aspect of the present invention, (1) the crusher has an opening for inputting the object to be treated and an outlet for the crushed object below. Which has a substantially rectangular parallelepiped shape, at least one rotary shaft that is driven to rotate in the casing, and another shaft that is adjacent to the shaft, or a fixed blade that is mounted in the casing and overlaps each other. As described above, the crushing blade rotor axially separated from the rotary shaft, and the object to be treated introduced into the casing through the charging opening is the crushing blade rotors of the rotating shafts that are rotationally driven or fixed blades. Is crushed due to the meshing of the overlapping portions with each other and discharged from the discharge port.

(2) The crushing blade rotor is composed of at least two crushing blades which are connected and fixed to each other, and a spacer which is mounted between the crushing blades and is divided into at least two and is connected and fixed to each other. The crushing blade is provided with a shoulder portion projecting from at least one side surface so as to surround the rotary shaft, and a spacer is provided on the side surface corresponding to the shoulder projecting side surface of the crushing blade. Since the protrusion that abuts from the outside is formed, when disassembling and removing the crushing blade from the rotating shaft, the spacer that abuts the shoulder protruding from the side surface of the crushing blade from the outside with the spacer First, the split surface can be disassembled and removed, then the crushing blade can be disassembled and removed on the split surface, and the rotor can be disassembled and removed without lifting the rotary shaft from the casing. In addition, it can be easily disassembled and removed without being significantly affected by rust or distortion of the rotating shaft after long-term operation. When restoring, the divided crushing blades are assembled and connected and fixed around the rotary shaft that is still mounted in the casing, and the spacers are connected and fixed so that the shoulders on the side of the divided spacers are abutted and pressed by the protruding parts of the divided spacers. However, it is possible to compensate for the decrease in rigidity due to the division.

(3) In the crusher according to the second aspect, the crushing blade is divided into two symmetrically with respect to its center line, and the spacer is divided into two symmetrically with respect to its center line. Therefore, it is possible to minimize the deterioration of rigidity with a minimum division, enable easy disassembly and removal, and restore, and also to provide compatibility between the division pieces and reduce the maintenance cost. (4) In the crusher according to the third aspect, the crushing blade has a key groove with respect to the rotation axis formed at each of the two divided blades at a position of 45 degrees from the center line of symmetry, and the spacer is Since the key groove for the above-mentioned rotation axis is formed at the position of 45 degrees from the symmetry center line or at the position of the symmetry center line in each of the two divided pieces, compatibility is given to the divided pieces, and a crushing blade is provided. The dividing surface of the spacer and the dividing surface of the spacer by 90
It is possible to minimize the reduction in rigidity of the crushing blade by shifting the rigidity.

(5) In the crusher according to the fourth aspect of the invention, the crushing blade and the spacer are fixed to the rotary shaft by shifting the respective dividing symmetry center lines thereof by 90 degrees in the circumferential direction. It is possible to minimize the decrease in rigidity of the crushing blade. (6) In the crusher according to claim 5, since the crushing blade has the replaceable blade fitted and fixed to the hook-shaped portion around the crushing blade, the crushing blade is partially worn, In case of damage, it can be restarted with minimal maintenance work. (7) In the crushing machine according to claim 6, the crushing blade is locked by the inner peripheral surface corresponding to the rotary shaft via the polygonal outer peripheral surface in each of the two divided blades. The crushing blade and the rotary shaft can be locked without using a key, and the degree of freedom in adjusting the position of the crushing blade is increased particularly in the case of a regular polygonal shape.

[Brief description of drawings]

FIG. 1 is a front view of a shear crusher of the present invention.

FIG. 2 is a right side view of the crusher.

FIG. 3 is a horizontal sectional view of a main part of the crusher.

4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is an assembled side view of a rotor including a 4-hook crushing blade.

FIG. 6 is a partial front view of the rotor.

FIG. 7 is an assembled side view of a rotor having a 6-hook crushing blade.

FIG. 8 is a partial front view of the rotor.

9A and 9B show an assembly of a rotor including a 6-hook crushing blade in which a replaceable blade is fixed to a hook-shaped portion, FIG. 9A is a side view thereof, and FIG. 9B is a plan view and a front view of the replaceable blade;
(C) is a plan view and a partial side view of the hook-shaped portion.

FIG. 10 is a perspective view of an additional blade on the side edge of the crushing blade.

FIG. 11 is a front view of a mono cutter and a piece cutter of a conventional shear crusher.

[Explanation of symbols]

 10 Casing 11 Inlet Opening 12 Outlet 15 Side Wall 20 Rotating Shaft 24 Key Groove 25 Crushing Blade Rotor 26 Crushing Blade 26A "Hook-shaped portion 27A Shoulder 29 Key Groove 30 Spacer 31A Projection 34 Key Groove C Replaceable Blade K Key L Center Line L'Center line

Claims (6)

[Claims] 1. A casing having a substantially rectangular parallelepiped shape having an opening for inputting an object to be treated and an outlet for crushing an object to be crushed, and at least one rotatably driven in the casing.
A rotary shaft of a book, and a crushing blade rotor axially separated from the rotary shaft so as to mutually overlap with that of another shaft adjacent to the rotary shaft or with a fixed blade mounted in the casing. In the crusher, the crushing blade rotor comprises at least two crushing blades that are divided and connected and fixed to each other, and spacers that are mounted between the crushing blades and that are at least divided into two and connected and fixed to each other. The crushing blade has a shoulder portion projecting from at least one side surface so as to surround the rotating shaft, and the spacer is connected to a side surface corresponding to the shoulder projecting side surface of the crushing blade. A crusher, characterized in that a protrusion that abuts from the outside is formed on the shoulder when fixed. 2. The crusher according to claim 1, wherein the crushing blade is divided into two parts symmetrically with respect to a center line thereof, and the spacer is divided into two parts symmetrically with respect to the center line thereof. 3. The crushing blade has a key groove with respect to the rotary shaft on each of the two divided blades, which is 4 from the center line of symmetry.
The spacer is formed at a position of 5 degrees, and the spacer is formed by forming a key groove with respect to the rotation axis at a position of 45 degrees from the symmetry center line or at a position of the symmetry center line on each of the two divided pieces. The crusher according to claim 2. 4. The crusher according to claim 1, wherein the crushing blade and the spacer are fixed to the rotary shaft with their respective dividing symmetry center lines displaced in the circumferential direction by 90 degrees from each other. 5. The crusher according to claim 1, wherein the crushing blade has a replaceable blade fitted and fixed to a hook-shaped portion around the crushing blade. 6. The crushing machine according to claim 1, wherein said crushing blades are locked by the inner peripheral surface corresponding to each of said rotary shafts through said polygonal outer peripheral surface in said two divided blades. .