JP6139307B2 - Crushing machine - Google Patents

Description

  The present invention relates to a biaxial crusher in which two rotors having rotating blades are arranged in parallel to each other.

  2. Description of the Related Art Conventionally, a biaxial crusher has been used to crush oversized garbage such as furniture and home appliances and various wastes such as tires, bicycles, and wood.

  As a conventional biaxial crusher, as shown in FIG. 12, there is one in which two rotors 103, 103 are arranged in parallel to each other in a casing 102. The rotor 103 includes a rotation shaft 104 to which a rotational force is input from a motor, a plurality of support disks 105 fixed to the outer periphery of the rotation shaft 104, and a rotary blade 106 fixed to the outer periphery of the support disk 105. Inside the casing 102, a fixed blade 107 that is disposed in the vicinity of the rotary blade 106 of the rotor 103 and fixed so as to perform a shearing operation with the rotating rotary blade 106, and below the two rotors 103 and 103. Is provided with a grid screen 108.

  The rotary blade 106 provided on the rotor 103 is formed so as to surround the outer periphery of the support disk 105 with the three rotary blades 106. As shown in FIG. 13, the rotary blade 106 is formed in a one-third arc shape, and is formed at one end of the rotary blade main body 106b and a rotary blade main body 106b whose inner peripheral surface is in contact with the outer peripheral surface of the support disk 105. The blade portion 106a has a sharp tip protruding in the radial direction. The blade portion 106a of the rotary blade 106 is provided with a bolt hole 109a having a seating surface of a bolt head. A bolt 110 inserted into the bolt hole 109a is used to connect one end of the rotary blade 106 to the adjacent rotary blade 106. The other end is fixed. The other end surface of the arc-shaped main body 106b is provided with a bolt hole 109b into which the tip of the bolt 110 inserted into the bolt hole 109a of the adjacent rotary blade 106 is screwed. A key groove 105 c into which a key for fixing the arc-shaped main body 106 b and the support disk 105 is fitted is provided on the inner peripheral surface of the arc-shaped main body 106 b. The support disk 105 and the rotary blade 106 are fixed at a predetermined interval along the rotation axis 106, and the two rotors 103 and 103 arranged in parallel are rotated by the support disk 105 and the rotary blade 106. The tracks are arranged so as to overlap when viewed in the axial direction.

  In the conventional crusher 101, the two rotors 103 are driven to rotate in opposite directions by the rotational force input from the motor to the rotating shaft 104, and the rotary blades 106 are moved from the top to the bottom at the opposing portions of the two rotors 103. Move to. When the workpiece to be processed is inserted between the two rotors 103 and moved downward, it is sheared by the adjacent rotary blade 106 and the rotary blade 106 and crushed. The When the workpiece moved below the rotor 103 is larger than the mesh size of the grid screen 108, the workpiece is held on the grid screen 108, and is sheared and crushed by the rotary blade 106 and the fixed blade 107. If the object to be processed becomes smaller than the mesh size of the grid screen 108 due to the shearing operation between the rotary blades 106 or the shearing operation of the rotary blade 106 and the fixed blade 107, the workpiece passes through the mesh of the grid screen 108 and falls downward. Then, it is collected by a belt conveyor (not shown) and discharged from the crusher 101.

JP 2000-117133 A

  However, since the above-described conventional crusher holds the workpiece to be moved below the rotors 103 and 103 with the lattice-like screen 108, when the rod-like workpiece is loaded, the workpiece is divided into the two rotors 103. , 103 and the mesh of the lattice-like screen 108, it may fall off and be discharged without being crushed.

  Further, the rotary blade 106 is disposed so as to surround the outer periphery of the support disk 105 with the three rotary blades 106, the adjacent rotary blades 106 are fixed to each other with the bolts 110, and rotate between the support disk 105. Since the stop key is provided, the number of parts related to the rotary blade 106 is large, and there is a problem that it takes time to replace the rotary blade 106 due to wear or the like.

  Accordingly, an object of the present invention is to provide a crusher capable of reliably crushing a workpiece having a relatively small cross-sectional dimension such as a rod-like workpiece and easily exchanging a fixed blade. It is in.

In order to solve the above problems, the crusher of the present invention has a casing having an input port for an object to be processed at the top and a discharge port at the bottom,
Two rotating shafts arranged parallel to each other inside the casing and driven to rotate;
A plurality of plate-like rotary blade supports arranged at predetermined intervals in the axial direction of the rotary shaft;
A rotary blade removably attached to the rotary blade support;
A fixed blade support member that extends in parallel with the rotation shaft and is disposed between the two rotation shafts in a plan view, and that is disposed closer to the discharge port than the rotation shaft. A plurality of fixed blades arranged so as to extend between an inner surface and the fixed blade support member are provided.

  According to the above configuration, the rotary shaft is driven to rotate, and the rotary blade attached to the rotary blade support is driven to rotate, so that the shear operation by the rotary blade and the rotary blade and the shear operation by the rotary blade and the fixed blade are performed. Done. An object to be processed that has been input from the input port at the upper part of the casing is crushed by receiving a shearing operation by the rotating blade and the rotating blade and a shearing operation by the rotating blade and the fixed blade. Here, even if a workpiece having a relatively small cross-sectional dimension, such as a rod-shaped workpiece, passes between the rotating shaft and the rotating shaft without being sheared, the workpiece is It contacts a plurality of fixed blades extending between the inner surface and the fixed blade support member. Moreover, even if the workpiece having a relatively small cross-sectional dimension passes between the plurality of fixed blades, the workpiece contacts the fixed blade support member that supports the fixed blade. Accordingly, the workpiece is effectively prevented from coming off by the fixed blade and / or the fixed blade support member, and therefore is effectively crushed by the rotary blade and the rotary blade or the rotary blade and the fixed blade. As a result, it is possible to prevent the inconvenience of the workpiece having a small cross-sectional dimension from falling out without being processed, and to increase the crushing efficiency of the workpiece.

  In the crusher of one embodiment, the fixed blade has a second arc shape along a trajectory of a rotary blade that is driven to rotate by the first rotary shaft and the other rotary shaft. Part.

  According to the above embodiment, the first arc-shaped portion of the fixed blade can prevent the problem that the workpiece is wound around one rotating shaft, and the second arc-shaped portion of the fixed blade is driven by the other rotating shaft. A shearing operation can be performed together with the rotary blade. Therefore, the crusher which can perform the shearing operation | movement of a to-be-processed object stably with few parts count is obtained. Here, the shape of the first arc-shaped portion may be a shape along the outer peripheral surface of an annular member attached to the rotation shaft, for example, in addition to a shape directly along the surface of the rotation shaft. The shape may be any shape along the outer peripheral surface of a member regarded as substantially the same as the rotation axis.

  In the crusher according to an embodiment, the fixed blade has a side portion of the first arcuate portion fixed to the inner surface of the casing, while a lower portion of the second arcuate portion is fixed to the fixed blade support member. Has been.

  According to the embodiment, since the lower part of the second arc-shaped portion of the fixed blade is supported by the fixed blade support member, the second arc-shaped portion and the rotary blade that is rotationally driven along the second arc-shaped portion. Thus, the workpiece is effectively sheared.

In the crusher of one embodiment, the rotary blade support has a rotary blade mounting portion protruding in a radial direction of the rotary shaft,
The rotary blade mounting portion has a rotary blade mounting surface substantially parallel to the radial direction of the rotary shaft,
The rotary blade has a contact surface in contact with the rotary blade mounting surface,
The rotary blade is fixed to the rotary blade mounting portion of the rotary blade support with bolts inserted in the tangential direction of the rotation locus from the rear in the rotational direction.

  According to the above embodiment, the rotating blade mounting surface of the rotating blade support is inserted into the rotating blade mounting portion from the rear in the tangential direction of the rotating locus with the contact surface of the rotating blade contacting the rotating blade mounting surface of the rotating blade mounting portion. Since the rotary blade is fixed to the rotary blade mounting portion with a bolt, the rotary blade can be attached and detached by operating the bolt of the rotary blade mounting portion of the rotary blade support. Therefore, the replacement operation of the rotary blade can be performed with fewer steps than before.

  In the crusher of one embodiment, the rotary blade mounting surface of the rotary blade mounting portion of the rotary blade support and the contact surface of the rotary blade are fitted with a convex portion formed on one side and a concave portion formed on the other side. It has a fitting structure formed by combining them.

  According to the above embodiment, the rotary blade is stabilized at the rotary blade mounting portion of the rotary blade support by the fitting structure provided on the rotary blade mounting surface of the rotary blade support and the contact surface of the rotary blade. Can be fixed.

  In the crusher of one embodiment, the fitting structure includes a recess and a protrusion extending in the radial direction of the rotation shaft, and a recess and a protrusion extending in a direction parallel to the rotation shaft.

  According to the above embodiment, the rotary blade can be appropriately and stably fixed to the rotary blade mounting portion of the rotary blade support, and the steady rest in the direction parallel to the rotary shaft and the steady rest in the radial direction of the rotary shaft. It can be performed.

  As for the crusher of one Embodiment, the said fitting structure has a T-shaped recessed part and a convex part.

  According to the above-described embodiment, the rotary blade can be appropriately and stably fixed to the rotary blade mounting portion of the rotary blade support with a relatively simple structure, and the steady state and rotation in the direction parallel to the rotary shaft The axial steadying of the shaft can be performed.

It is a cross-sectional view which shows the crusher of embodiment of this invention. It is a top view which shows a crusher. It is a side view which shows a rotary blade support unit. It is a front view which shows a rotary blade support unit. It is a top view which shows a rotary blade. It is a side view which shows a rotary blade. It is a rear view which shows a rotary blade. It is a front view which shows a fixed blade. It is a top view which shows another rotary blade. It is a side view which shows another rotary blade. It is a rear view which shows another rotary blade. It is a cross-sectional view showing a conventional crusher. It is a front view which shows the rotary blade with which the conventional crusher is provided.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a cross-sectional view showing a crusher according to an embodiment of the present invention, and FIG. 2 is a plan view of the crusher of FIG. The crusher 1 of this embodiment crushes various wastes such as furniture, home appliances, bicycles, automobile parts, drums, and wood into pieces, and is used in various industries such as waste disposal and production of recycled materials. Used in.

  The crusher 1 has a substantially rectangular parallelepiped casing 2 in which an input port 2 a for the object to be processed is formed at the upper end and a discharge port 2 b for discharging the object to be processed after the crushing process is formed in the lower end. The two rotors 3 and 3 that are disposed in the rotor and are rotationally driven with the rotary blades 6, the fixed blades 8 that are disposed below the rotors 3 and 3, and the rotors 3 and 3 that are rotationally driven (not shown). The motor is roughly configured.

  A rod-shaped fixed blade support member 9 having a rectangular cross section is disposed on the discharge port 2b side of the rotors 3 and 3 in the casing 2. The fixed blade support member 9 is disposed between the two rotation shafts 4 in parallel with the rotation shafts 4 in plan view. Two flange-shaped side support members 10 and 10 are fixed to inner surfaces of the casing 2 facing each other with the rotors 3 and 3 therebetween. These side support members 10 and 10 are disposed at substantially the same height as the fixed blade support member 9.

  The rotor 3 includes a rotary shaft 4 having a circular cross section to which rotational force is transmitted from the motor, and a plurality of rotary blade support units 5, 5,... Externally fitted to the rotary shaft 4 and arranged in the axial direction. A rotary blade 6 attached to the rotary blade support unit 5 is provided.

  As shown in the side view of FIG. 3 and the front view of FIG. 4, the rotary blade support unit 5 includes an annular shaft mounting portion 51 having an insertion hole 55 inserted through the rotating shaft 4, and an outer periphery of the shaft mounting portion 51. It has the plate-shaped rotary blade support body 52 fixed to the surface. The rotary blade support 52 has a rotary blade support portion 53 that protrudes in the radial direction. The rotary blade support portion 53 has an end face that faces in a direction parallel to the tangent to the rotary shaft 4 and an attachment surface of the rotary blade 6. 53a is formed. The mounting surface 53a is provided with a fitting groove 54 as an inverted T-shaped recess in a side view of FIG. The rotary blade support portion 53 is provided with a bolt hole 55 extending in the tangential direction of the rotary shaft 4 from the back surface of the mounting surface 53a toward the mounting surface 53a. Two bolt holes 55 are arranged in the radial direction per one mounting surface 53a. The rotary blade 6 is attached to the attachment surface 53a. On the wall surface of the insertion hole 55 of the shaft mounting portion 51 of the rotary blade support unit 5, there are two key grooves 56 to which the non-rotating key 11 between the rotary shaft 4 and the central axis is symmetrical in the radial direction. Is formed. A plurality of the rotary blade support units 5 are arranged and mounted on each of the two rotary shafts 4 and 4 so that the end surfaces of the shaft mounting portions 51 are in contact with each other. A shaft spacer 58 is mounted in the vicinity of the wall surface of each rotating shaft 4, 4 facing the direction of the rotating shaft 4 in the casing 2, whereby the mounting position of the rotary blade support unit 5 with respect to the rotating shaft 4, 4 is mounted. Are adjusted, and the rotary blade support bodies 52 of the rotary blade support unit 5 mounted on both the rotary shafts 4 and 4 are arranged alternately in the direction of the rotary shaft 4.

  The plurality of rotary blade support units 5 provided on the rotor 3 are fixed with a phase shifted around the rotary shaft 4. Thereby, when the rotary blade 6 shears the workpiece, the resistance acting on the rotary shaft 4 from the rotary blade support unit 5 is shifted for each rotary blade support unit 5. In the cross-sectional view of FIG. 1, only a single rotary blade support unit 5 close to the horizontal cross-section among a plurality of rotary blade support units 5 mounted on the rotary shaft 4 is shown. The rotary blade support unit 5 of one rotor 3 and the rotary blade support unit 5 of the other rotor 3 are mounted in opposite directions. Specifically, as shown in the cross-sectional view of FIG. 1, the cutting edge of the rotary blade 6 fixed to the rotary blade support unit 5 of the two rotors 3, 3 is disposed between the rotors 3, 3. It is arranged to face the side. Further, the rotary blade support unit 5 of one rotor 3 and the rotary blade support unit 5 of the other rotor 3 are mounted with a phase difference of about 90 °.

  FIG. 5 is a plan view of the rotary blade 6, FIG. 6 is a side view of the rotary blade 6, and FIG. 7 is a rear view of the rotary blade 6. The rotary blade 6 has a blade 61 with a blade tip extending in the radial direction on the front side. The blade 61 protrudes in the rotational direction toward the outer side in the radial direction of the rotary shaft 4 when attached to the rotary blade support unit 5, and as a result, as shown in the side view of FIG. A radially outer tip is formed at an acute angle. As shown in FIG. 7, a fitting convex portion 62 formed in a T-shape is provided on the back side of the rotary blade 6, and the fitting convex portion 62 is provided on the rotary blade support unit 5. Two bolt holes 66 are arranged on the outer side and the inner side in the radial direction of the rotary shaft 4 when attached. The fitting convex portion 62 has a convex side surface where a portion extending in the height direction, that is, the radial direction of the rotating shaft 4, and a width direction, ie, a portion extending in a direction parallel to the rotating shaft 4 are connected. 63 is formed in a curved surface. The T-shaped fitting convex portion 62 of the rotary blade 6 is fitted into a T-shaped fitting groove 54 formed on the mounting surface 53a of the rotary blade support portion 53 of the rotary support 52, and the rotary support body. The rotary blade 6 is fixed to the rotary blade support portion 53 of the rotary support 52 by screwing the bolt inserted into the bolt hole 55 of the 53 into the bolt hole 66 of the rotary blade 6 and fastening it.

  FIG. 8 is a front view showing the fixed blade 8. The fixed blade 8 is arranged so as to extend between the inner surface of the casing 2 and the fixed blade support member 9 in plan view. The fixed blade 8 extends in the vertical direction of FIG. 8 and is fixed to the inner surface of the casing 2. The lower edge 82 extends in the horizontal direction of FIG. An upper inclined edge 84 that is inclined downward, and a first arcuate portion 85 that is continuous with the upper inclined edge 84 and extends along the outer peripheral surface of the shaft mounting portion 51 of the rotary blade support unit 5 that is mounted on one rotary shaft 4. A contour is formed by the second arcuate portion 86 along the locus of the rotary blade 6 fixed to the rotary blade support unit 5 attached to the other rotary shaft 4. On both sides of the lower edge 82 of the fixed blade 8, a side fixing portion 82 a that is fitted and fixed to the side support member 10, and a center fixing portion 82 b that is fitted and fixed to the fixed blade support member 9. Have The center fixing portion 82b is located below the second arc-shaped portion 86, and the distal ends thereof are continuous. The fixed blade 8 is positioned from the side of the rotor 3 in the casing 2 to the lower side in the cross-sectional view, and the rotary blade support 52 of the plurality of rotary blade support units 5 attached to the rotor 3 in the plan view. They are arranged at equal intervals in the extending direction of the rotating shaft 4 so as to be located between them. As shown in FIG. 1, the plurality of fixed blades 8 are arranged so that the second arcuate portions 86 overlap when viewed in the axial direction of the rotating shaft 4.

  The crusher 1 having the above-described configuration operates as follows. First, the motor is activated to drive the two rotary shafts 4 and 4 to rotate in opposite directions, whereby the two rotors 3 and 3 rotate in opposite directions. The number of rotations of the rotor 3 can be set to 20 rpm or more and 30 rpm or less when the object to be processed is a woody material such as a thinning material or a pruning material. When the two rotors 3 and 3 rotate in opposite directions, the rotary blade 6 of the rotors 3 and 3 moves between the two rotary shafts 4 and 4 in a plan view and two rotary shafts in a cross-sectional view. Driven between 4 and 4 from the inlet 2a toward the outlet 2b. The workpiece to be processed fed from the charging port 2 a of the casing 2 is guided between the rotating shafts 4 and 4 by the rotating rotors 3 and 3 and is sheared by the interaction of the rotary blade 6 of the rotor 3. The When the workpiece moves below the rotary shaft 4, it is sheared by the action of the fixed blade 8 and the rotary blade 6.

  Here, since the fixed blade 8 has the second arc-shaped portion 86 along the locus of the rotary blade 6, the sectional dimension between the rotary shafts 4 and 4 is relatively small, for example, like a rod-shaped workpiece. Even if the object to be processed passes without being sheared, the object to be processed abuts on the second arcuate portion 86 of the fixed blade 8 and remains on the fixed blade 8. Therefore, the workpiece is reliably sheared by the rotary blades 6 or by the rotary blades 6 and the fixed blades 8. Further, even when the cross-sectional dimension of the workpiece that has not been sheared between the rotary shafts 4 and 4 is relatively small and passes between the fixed blades 8, the workpiece is not attached to the fixed blade 8. The two-arc-shaped portion 86 abuts on the fixed blade support member 9 that supports the arcuate portion 86 and is received on the fixed blade support member 9 and the fixed blade 8. Therefore, even a workpiece having a relatively small cross-sectional dimension is effectively sheared by the rotary blades 6 or by the rotary blades 6 and the fixed blades 8.

  Further, when a workpiece having a relatively small cross-sectional dimension falls between the inner surface of the casing 2 and the rotor 3, the workpiece is brought into contact with and locked to the side support member 10 provided on the inner surface of the casing 2. The object to be processed locked to the side support member 10 is pulled up by the rotary blade 6 of the rotor 3 and sheared by the rotary blades 6 or by the rotary blade 6 and the fixed blade 8. In this way, even if the workpiece having a relatively small cross-sectional dimension is thrown out between the rotors 3 and 3, the workpiece is received by the side support member 10, and can be received by the rotary blades 6 or by the rotary blades 6. And is effectively sheared by the fixed blade 8.

  The object to be processed which has been sheared and becomes smaller than a predetermined size falls through the gaps formed between the fixed blades 8 and between the fixed blade support member 9 and the side support member 10. It is discharged downward from a discharge port 2b at the bottom of the casing 2.

  Thus, according to the crusher 1 of the said embodiment, even if the to-be-processed object with a small cross-sectional area like a pruning material of a thin branch, for example is thrown in, with the rotary blade 6 mutually or with the rotary blade 6 The fixed blade 8 can be effectively crushed.

  Moreover, according to the crusher 1 of the said embodiment, the fitting convex part 62 of the rotary blade 6 is fitted in the fitting groove 54 provided in the attachment surface 53a of the rotary blade support part 53 of the rotary blade support body 52. The rotary blade 6 is fixed by a bolt inserted into the bolt hole 55 from the back side in the rotation direction of the rotary blade support 53 of the rotary blade support 52. Therefore, for example, in the maintenance work, the rotary blade 6 can be attached and detached by operating the bolt on the back surface of the rotary blade support portion 53. Therefore, the replacement work of the rotary blade 6 can be performed with fewer steps than before. Moreover, since the rotary blade 6 is fixed by the bolt inserted into the bolt hole 55 from the back side in the rotation direction of the rotary blade support portion 53 of the rotary blade support 52, the bolt hole 55 is accompanied with the rotation of the rotary blade support 52. There is no risk of clogging the workpiece. Therefore, it is possible to easily replace the rotary blade 6 by operating the bolt. Further, it is possible to prevent inconvenience that the bolt is excessively fastened due to clogging of the workpiece into the bolt hole 55.

  Further, since the fitting convex portion 62 of the rotary blade 6 is fitted in the fitting groove 54 of the mounting surface 53 a of the rotary blade support portion 53, the rotary blade 6 is attached to the rotary blade support portion of the rotary blade support 52. 53 can be stably fixed. Further, since the fitting convex portion 62 of the rotary blade 6 and the fitting groove 54 provided on the mounting surface 53a of the rotary blade support portion 53 of the rotary blade support 52 are formed in a T shape, the fixed blade 6, the steadying in the axial direction and the radial direction of the rotating shaft 4 can be effectively performed. In the above embodiment, the fitting convex portion 62 of the rotary blade 6 and the fitting groove 54 of the mounting surface 53a of the rotary blade support portion 53 of the rotary blade support 52 are formed in a T shape. You may form in a shape, I shape, etc. Further, although the rotary blade 6 is provided with the fitting convex portion 62 and the rotary blade support body 52 is provided with the fitting groove 54, the rotary blade 6 is provided with the fitting groove portion, and the rotary blade support body 52 is provided with the fitting convex portion. It may be provided.

  In the above-described embodiment, the rotary blade 6 having the blade 61 whose blade edge extends in the radial direction is used, but a rotary blade of another shape may be used. For example, as shown in the plan view of FIG. 9, the side view of FIG. 10, and the rear view of FIG. 11, the cutting edge is formed at the outermost edge in the radial direction of the rotating shaft 4, that is, in the protruding direction of the rotating blade support 53. The rotary blade 60 extending in the direction of the rotation axis 4, that is, in the thickness direction of the rotary blade support portion 53 can be used. The rotary blade 60 is formed with a width wider than the thickness of the rotary blade support portion 53, and inclined step portions 165 are formed on both sides of the back surface fixed to the mounting surface 53 a of the rotary blade support portion 53. 9 to 11, the fitting convex part 62, the convex part side face 63, and the bolt hole 66 are the same as those of the rotary blade 6 of the above embodiment. By using the rotary blade 60 formed at the outermost edge in the radial direction of the rotary shaft 4 and extending in the direction of the rotary shaft 4 and wider than the rotary blade support portion 53, the rotary blade of the above embodiment is used. Since an impact force larger than 6 can be applied to the workpiece, a high crushing effect can be obtained.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Casing 2a Casing inlet 2b Casing outlet 3 Rotor 4 Rotating shaft 5 Rotating blade support unit 6 Rotating blade 8 Fixed blade 52 Rotating blade support 53 Rotating blade support 53a Mounting surface 54 Fitting groove 61 Blade 62 fitting convex part 66 bolt hole 85 1st arcuate part 86 2nd arcuate part

Claims (2)

A casing having an input port for an object to be processed at the top and a discharge port at the bottom;
Two rotating shafts arranged parallel to each other inside the casing and driven to rotate;
A plurality of plate-like rotary blade supports arranged at predetermined intervals in the axial direction of the rotary shaft;
The rotary blade support is detachably attached , and is driven between the two rotation shafts in a plan view and between the two rotation shafts in a cross-sectional view so as to be directed from the input port to the discharge port. A rotary blade that is driven so that the rotation trajectories overlap each other in the axial direction between the two rotation axes ;
A fixed blade support member that extends parallel to the rotation axis, is disposed between the two rotation axes in a plan view, and is disposed closer to the discharge port than the rotation axis ;
A plurality of fixed blades arranged so as to extend between the inner surface of the casing and the fixed blade support member in plan view ;
The fixed blade has a first arc-shaped portion along the outer peripheral surface of one of the rotating shafts, and a second arc-shaped portion along the locus of the rotating blade driven to rotate by the other rotating shaft,
The fixed blade has a side portion of the first arc-shaped portion fixed to the inner surface of the casing, while a lower portion of the second arc-shaped portion is fixed to the fixed blade support member,
The rotary blade support has a rotary blade mounting portion protruding in the radial direction of the rotary shaft,
The rotary blade mounting portion has a rotary blade mounting surface substantially parallel to the radial direction of the rotary shaft,
The rotary blade has a contact surface in contact with the rotary blade mounting surface,
The rotary blade is fixed to the rotary blade mounting portion of the rotary blade support with a bolt inserted in the tangential direction of the rotation locus from the rear in the rotational direction,
The rotary blade mounting surface of the rotary blade support portion of the rotary blade support and the contact surface of the rotary blade have a fitting structure formed by fitting a convex portion formed on one side and a concave portion formed on the other side. Have
The said fitting structure has a groove | channel and a convex part extended in the radial direction of the said rotating shaft, and a groove | channel and convex part extended in the direction parallel to the said rotating shaft, The crusher characterized by the above-mentioned . The crusher according to claim 1 ,
The crusher characterized in that the fitting structure has a T-shaped groove and a convex portion.

Images