JP2013248618A - Rotary blade for crusher, crusher including the same, and mounting structure of the rotary blade for crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary blade for a crusher, in which a fixing bolt can easily removed from a fixing bolt hole even after crushing work for shearing crushing of crushing objects.SOLUTION: In a rotary blade 15 for a crusher, a fixing bolt 21 is inserted into a fixing bolt hole 45, the rotary blade is detachably mounted to a rotary rotor by the fixing bolt 21, and the shearing crushing of a crushing object can be performed between a fixed blade and itself. A deformation suppressing part 55 (tilted flat part) is provided to a crossing part 58 at each opening edge part 56 of a counter boring part 47 of the rotary blade 15. The deformation suppressing part 55 is composed to regulate a protrusion amount of an inward protruded part formed by inward deforming of the crossing part 58 from an opening inner periphery surface 47a of the counter boring part 47 to a size not to catch the inward protruded part by a head part 21a when attaching/detaching the fixing bolt 21 to the counter boring part 47, when crushing the crushing object by the rotary blade 15.

Description

  The present invention relates to a rotary blade for a crusher used in a uniaxial crusher and a biaxial crusher for crushing objects to be crushed such as waste wood, waste plastic, waste paper, etc., a crusher provided with the crusher, and a rotary blade for a crusher This relates to the mounting structure.

An example of a conventional crusher is shown in FIG. 9 (see, for example, Patent Document 1).
The crusher 1 is configured to remove an object to be crushed such as waste wood and waste plastic between a plurality of rotary blades 3 attached to the surface of a rotor 2 and a fixed blade 4 provided in a fixed part (not shown). Shear crushing with.
A plurality of mounting grooves 2 a are formed on the outer peripheral surface of the rotor 2.
Each of the plurality of attachment grooves 2a has a substantially right-angled isosceles triangle, and a plurality of rotary blades 3 are detachably attached to the attachment grooves 2a with fixing bolts 5 along the circumferential direction.
Each of the plurality of rotary blades 3 is the same, and includes a blade body portion 6 and a blade portion 7 (carbide tip).

As shown in FIGS. 9 and 10, the blade main body 6 has a blade 7 having the same shape as the front end surface by brazing on the entire front end surface on the front side with reference to the rotation direction of the rotary blade 3. It is attached.
The blade portion 7 is a plate-like body having a substantially square front shape.
And the blade main-body part 6 is the shape of the substantially square pillar whose end surface is substantially square, The state which two side surfaces (lower surface) mutually adjacent to this blade main-body part 6 contact | adhered to the V-shaped inner surface of the attachment groove 2a. And is attached to the mounting groove 2a.

  As shown in FIGS. 9 and 10, the fixing bolt hole 8 through which the fixing bolt 5 is inserted is provided so as to pass through the ridge line portion 3 a formed on the outer surface of the substantially square pillar-shaped rotary blade 3. It has been.

  According to the crusher 1 shown in FIG. 9, by rotating the rotor 2 in a predetermined direction 9, the object to be crushed is sandwiched between the plurality of rotating blades 3 and the fixed blade 4, and the object to be crushed is sequentially sheared. Can be crushed.

JP 2003-265978 A

  As shown in FIG. 11, the conventional rotary blade 3 has a ridge line portion 3 a of the fixed bolt hole 8 (counterbore portion 8 a) formed in the rotary blade 3 when the object to be crushed is sequentially sheared and crushed. Among the opening edges on the side, the intersection 10 that intersects the ridge 3a is formed in a triangular pyramid shape with a sharp tip, and therefore is easily deformed by collision with the object to be crushed. Each of the intersecting portions 10 is deformed inwardly than the opening inner surface 8b of the spot facing portion 8a due to the collision with the object to be crushed, so that an inward convex portion 100 is formed.

  Thus, when the inward convex part 100 is formed in the crossing part 10 (see FIG. 11), for example, in order to replace or repair the rotary blade 3, the fixing bolt 5 is loosened and the fixing bolt hole 8 is removed. When removing, the fixing bolt 5 cannot be easily removed from the fixing bolt hole 8 by being obstructed by the inward convex portion 100, and as a result, it becomes difficult to remove the rotary blade 3 from the rotor 2.

  In such a case, it is necessary for the operator to scrape off the inward convex portion 100, which is troublesome and takes a long time to replace and repair the rotary blade 3, thereby prolonging the stop time of the crusher 1. It will be.

  Moreover, as shown in FIG. 9, the counterbore part 8a formed in the rotary blade 3 has a head 5a seated on the seat surface 8c of the counterbore part 8a in a state where the rotary blade 3 is viewed from the side surface direction. Since the shape is exposed from the spot facing portion 8 a, the object to be crushed toward the head 5 a of the fixing bolt 5 is sheared when the object to be crushed is sheared. The head 5a of the fixing bolt 5 may collide with the object to be crushed and be worn or deformed.

As a result, for example, an engagement function of an engagement recess (not shown) such as a hexagonal hole provided on the head 5a of the fixing bolt 5 for rotating the fixing bolt 5 by engaging a tool such as a hexagon wrench. May decrease, and this shortens the life of the fixing bolt 5.
Then, due to wear or deformation of the head 5 a of the fixing bolt 5, the attachment strength of the rotary blade 3 to the rotor 2 by the fixing bolt 5 may be reduced.

  The present invention has been made to solve the above-described problems, and even after performing a crushing operation for shearing and crushing an object to be crushed, the fixing bolt can be easily removed from the fixing bolt hole. As a result, it aims at providing the rotary blade for crushers which can remove a rotary blade easily from a blade attachment part, the crusher provided with the same, and the attachment structure of the rotary blade for crushers.

The rotary blade for a crusher according to the present invention has a fixing bolt hole, the fixing bolt is inserted into the fixing bolt hole, and is detachably attached to the rotating blade mounting portion by the fixing bolt, In the rotary blade for a crusher capable of shearing and crushing the object to be crushed with the other-side cutter, on the outer surface of the rotary blade for the crusher, a deformation suppressing portion is provided at the opening edge of the fixed bolt hole. The deformation suppressing portion is formed by the opening edge portion being deformed inward from the inner peripheral surface of the fixed bolt hole when the object to be crushed is crushed by the rotary blade for the crusher. The amount of protrusion of the inward convex portion is limited to a size such that the inward convex portion does not catch on the head when the fixing bolt is attached or detached.
When the crusher rotary blade according to the present invention is used by being attached to the crusher, a plurality of crusher rotary blades (hereinafter sometimes simply referred to as “rotary blades”) are used as the crusher blade mounting portion ( For example, it is detachably attached to the rotor.
Then, by rotating the blade mounting portion, the object to be crushed is sandwiched between the plurality of rotary blades and the counterpart blade (the counterpart fixed blade or the counterpart rotary blade), and the object to be crushed is sequentially sheared. Can be crushed.
When the object to be crushed is sheared and crushed sequentially, the outer surface of the rotary blade is deformed by collision with the object to be crushed, but the outer surface of the rotary blade is provided with a deformation suppressing part at the opening edge of the fixed bolt hole. Therefore, the amount of protrusion of the inward convex portion formed by the opening edge portion being deformed inward from the inner peripheral surface of the fixing bolt hole is determined by the inward convex portion. It is possible to regulate the size so that the head does not get caught when attaching and detaching.

Accordingly, for example, when the rotating bolt is loosened and removed from the fixing bolt hole in order to replace or repair the rotary blade, the fixing bolt can be easily removed from the fixing bolt hole without being obstructed by the inward convex portion. As a result, the rotary blade can be easily detached from the blade mounting portion.
In the rotary blade for a crusher according to the present invention, the deformation suppressing portion is an inclined flat surface portion or an inclined curved surface portion formed by removing a corner portion of the opening edge portion of the fixing bolt hole. it can.
As described above, the inclined flat surface portion or the inclined curved surface portion formed by removing the corner portion of the opening edge portion of the fixing bolt hole causes the opening edge portion of the fixing bolt hole to collide with the object to be crushed during the crushing operation. Even when the opening edge is deformed by the inner edge of the opening of the fixing bolt hole, the amount of protrusion of the inward protrusion formed by the inner edge of the fixing bolt hole is determined. When attaching and detaching the fixing bolt, the size can be regulated so as not to be caught on the head.
In the rotary blade for a crusher according to the present invention, the deformation suppressing portion performs a quenching process on the inclined flat surface portion or the inclined curved surface portion formed at a corner portion of the opening edge portion of the fixing bolt hole. Can be.
In this way, when the material to be crushed is sheared and crushed, the opening edge of the fixing bolt hole can reduce the amount of deformation in the direction toward the opening.
Thereby, when removing a fixing bolt from a fixing bolt hole, possibility that it will be disturbed by the inward convex part formed in the opening edge part can further be reduced.
In the rotary blade for a crusher according to the present invention, the rotary blade for the crusher is formed in a substantially polygonal column shape, a blade portion is provided at a tip portion thereof, and the fixing bolt hole is crushed in the substantially polygonal column shape. It is provided so that it may pass through the ridgeline part currently formed in the outer surface of the rotary blade for machines, and the above-mentioned deformation control part intersects the above-mentioned ridgeline part among the opening edge part by the side of the ridgeline part of the above-mentioned fixed bolt hole. And the crossing portion that is the front side and the crossing portion that is the rear side with respect to the rotation direction of the rotary blade for the crusher, or one that is provided at any one of the crossing portions. can do.
In this way, when the object to be crushed is sequentially sheared and crushed, among the opening edges on the ridge line part side of the fixed bolt hole formed in the rotary blade, in particular, the intersecting part intersecting the ridge line part is the object to be crushed. However, this intersection is deformed inwardly of the inner peripheral surface of the fixed bolt hole because the deformation suppression portion is provided at the intersection. The amount of protrusion of the inwardly convex portion formed by the above-mentioned can be restricted to such a size that the inwardly convex portion is not caught by the head when the fixing bolt is attached to or detached from the fixing bolt hole.
In the rotary blade for a crusher according to the present invention, the fixing bolt hole is provided so as to pass through an outer flat surface portion formed in the rotary blade for the crusher, and the deformation suppressing portion is provided in the fixing bolt hole. It can be provided at the opening edge of the outer flat surface.
As described above, when the fixing bolt hole is provided so as to pass through the outer flat portion formed in the rotary blade for the crusher, the opening edge portion of the outer flat portion of the fixing bolt hole collides with the object to be crushed. The degree of deformation may be small depending on the condition, but by providing a deformation suppression part at such an opening edge, removal of the fixing bolt can be hindered by the inward convex part formed at the opening edge. The property can be further reduced.
In the rotary blade for a crusher according to the present invention, a counterbore portion is formed on an outer surface of the rotary blade for the crusher, and an opening portion of the fixing bolt hole. In the state where the head of the fixing bolt is seated, the upper end of the head is formed at a height that is disposed below the opening edge of the spot facing.
In this way, the crusher rotary blade is attached to the blade mounting portion with the fixing bolt, and the upper end of the head is the counterbore portion with the head of the fixing bolt seated on the seat surface of the counterbore. If it is arranged below the opening edge, when the object to be crushed is sheared, the object to be crushed toward the head of the fixing bolt will collide with the outer surface of the rotary blade. The possibility of colliding with the head of the fixing bolt can be reduced.
Thereby, it can suppress that the head of a fixing bolt collides with a to-be-crushed object, and is worn out or deform | transformed.

As a result, for example, it is possible to suppress a decrease in the engagement function of the engagement recess provided on the head of the fixing bolt and rotating the fixing bolt by engaging the tool.
That is, the engagement function of the engagement recess for engaging the tool can be protected, and thereby the life of the fixing bolt can be extended.
And since wear and a deformation | transformation of the head of a fixing bolt can be suppressed, the fall of the attachment strength with respect to the blade attachment part of the rotary blade by a fixing bolt can be suppressed.
In the rotary blade for a crusher according to the present invention, the direction of attachment of the rotary blade for the crusher to the blade mounting portion cannot be changed, and the counterbore portion is included in both openings of the fixed bolt holes. It can be formed in one opening.
Thus, if the counterbore part is formed in one of the two openings of the fixing bolt hole, the depth dimension of the counterbore part can be increased. The distance between the upper end of the head and the opening edge of the counterbore can be made sufficiently large.
Therefore, it is possible to sufficiently suppress the head of the fixing bolt from being damaged due to collision or friction with the object to be crushed.
The crusher which concerns on this invention is equipped with the rotary blade for crushers of this invention, It is characterized by the above-mentioned.
According to the crusher according to the present invention, the object to be crushed is sandwiched between the rotary blade for the crusher and the counterpart blade (the counterpart fixed blade or the counterpart rotary blade) by rotating the blade mounting portion. This object to be crushed can be sequentially sheared and crushed.
And the rotary blade for crushers applied to this crusher acts similarly to the rotary blade for crushers which concerns on this invention.
The crusher rotary blade mounting structure according to the present invention includes the crusher rotary blade according to the present invention, and is fixedly mounted to the blade mounting portion and abuts against a rear end portion of the rotary blade, and the rotation And a movement blocking unit for blocking the movement of the rotary blade by a force acting when the blade shears and crushes the object to be crushed.
According to the mounting structure of the rotary blade for a crusher according to the present invention, when crushing the object to be crushed between the rotary blade and the counterpart tool, forces in various directions are applied from the object to be crushed to the rotary blade. Works.
Therefore, if there is no movement prevention part, the mounting position of the rotary blade with respect to the blade mounting part may be shifted. In such a case, the rotary blade may interfere with the counterpart blade, In addition, the counterpart tool may be damaged.
However, by providing the movement blocking part, the movement blocking part abuts against the rear end of the rotary blade and can prevent the rotary blade from moving, so that the rotary blade and the counterpart blade can be prevented from being damaged. it can.

According to the rotary blade for a crusher according to the present invention, since the fixing bolt can be easily removed from the fixing bolt hole even after the crushing operation for shearing and crushing the object to be crushed, the rotary blade is attached to the blade. It can be easily removed from the part.
Therefore, for example, it is possible to perform, for example, replacement work or repair work of the rotary blade in a short time with a small amount of labor, and thus the stop time of the crusher can be shortened.

It is a longitudinal cross-sectional view which shows the crusher provided with the rotary blade for crushers which concerns on 1st Embodiment of this invention. It is a perspective view which shows the some rotary blade for crushers attached to the surface of the rotor with which the crusher which concerns on the 1st Embodiment is provided. It is a disassembled perspective view which shows the rotary blade attachment structure of the rotary blade for crushers which concerns on the 1st Embodiment. It is a disassembled front view which shows the rotary blade attachment structure of the rotary blade for crushers which concerns on the 1st Embodiment. It is a top view which shows the state which attached the rotary blade for crushers which concerns on the 1st Embodiment to the surface of the rotor. It is a longitudinal cross-sectional view which shows the state which attached the rotary blade for crushers which concerns on the 1st Embodiment to the surface of the rotor. It is a front view which shows the state which attached the rotary blade for crushers which concerns on the 1st Embodiment to the surface of the rotor. It is a longitudinal cross-sectional view which shows the state which attached the rotary blade for crushers which concerns on 2nd Embodiment of the invention to the surface of the rotor. It is a side view which shows the state which attached the conventional rotary blade to the surface of the rotor. It is a figure which shows the conventional rotary blade shown in FIG. 9, (a) is a top perspective view, (b) is a longitudinal cross-sectional view. It is an expanded sectional view which shows the counterbore part of the conventional rotary blade shown in FIG.

Hereinafter, a rotary blade for a crusher according to the present invention (hereinafter sometimes simply referred to as a “rotary blade”), a crusher provided with the crusher, and a first embodiment of a mounting structure for a rotary blade for a crusher are shown in FIG. A description will be given with reference to FIGS.
The crusher 11 is, for example, a uniaxial crusher, and is an apparatus that can crush an object to be crushed 12 such as waste wood, waste plastic, and waste paper into a predetermined size.
The reason why the object 12 is crushed by the crusher 11 is to allow the object 12 such as waste to be recycled as boiler fuel or agricultural material.

  As shown in FIG. 1, the crusher 11 includes a casing 13, a rotor (blade attachment portion) 14 disposed inside the casing 13, a plurality of rotary blades 15 attached to the surface of the rotor 14, and a casing. 13, a fixed blade 16 disposed along the surface of the rotor 14, a hopper 17 attached to the upper part of the casing 13, and a pusher 18 attached to the side of the casing 13.

The casing 13 is a portion that serves as a base for supporting each of the above components.
A housing space S having a substantially square shape in plan view for housing the object to be crushed 12 is formed inside the casing 13, and the rotor 14, the hopper 17, the pusher 18 and the like surround the housing space S. 13 is fixed.

As shown in FIG. 2, the rotor 14 has a hollow cylindrical or solid columnar rotor body 14a, and rotating shafts 14b formed at the centers of both axial ends of the rotor body 14a. The rotating shaft 14b is rotatably supported by a bearing (not shown) attached to the casing 13.
In this way, the rotor 14 is rotatably supported by the bearing.
A drive motor (not shown) is connected to the rotating shaft 14b of the rotor 14 via a gear unit or the like.
With this drive motor, the rotor 14 can be rotated in a predetermined direction 19.

And on the surface of the rotor body 14a, for example, a plurality of mounting grooves 20 are formed so as to be arranged in a plurality of spirals, and each of the mounting grooves 20 has one rotary blade 15 and a fixing bolt 21. It is attached with.
As a result, the number of rotary blades 15 aligned in a straight line in the axial direction of the rotor 14 is reduced, and each of the plurality of rotary blades 15 sandwiches the object to be crushed 12 with the fixed blade 16 and shears and crushes. When doing so, it is possible to prevent an excessive load from being applied to the fixed blade 16 and the rotor 14.

  The attachment groove 20 and the rotary blade 15 constitute a crusher rotary blade attachment structure 22 (FIGS. 3 to 7), and specific configurations thereof will be described later.

Further, as shown in FIG. 1, a part of the outer peripheral surface of the rotor body 14 a is arranged to face the accommodation space S in a state where the rotor 14 is rotatably supported inside the casing 13. The other part of the outer peripheral surface of the rotor body 14 a is covered with a screen 23.
A large number of holes are formed in the screen 23, and the object to be crushed 12 is between the plurality of rotary blades 15 and the fixed blades 16 until the size of the large number of holes formed in the screen 23 becomes smaller. And repeatedly sheared.
Therefore, the size of the finally obtained crushed piece q can be adjusted by replacing the screen 23 with a different hole diameter.

As shown in FIG. 1, the fixed blade 16 crushes the object 12 to be crushed with a shearing force between the fixed blade 16 and is formed in a plate shape from a hard metal material or the like.
As shown in FIG. 2, the fixed blade 16 includes a joint portion 24 and a plurality of blade portions 25 provided on the joint portion 24.

  The blade portion 25 of the fixed blade 16 is a substantially triangular plate-like body, and a plurality of the blade portions 25 are fixed to the edge portion of the elongated plate-like joint portion 24 toward the surface of the rotor body 14a so as to continue along the edge portion. Attached.

  As shown in FIGS. 1 and 2, the fixed blade 16 configured as described above can sequentially shear and crush the object to be crushed 12 between the fixed blade 16 and each of the plurality of rotary blades 15. .

  The hopper 17 forms a supply port for supplying the material 12 to be crushed into the accommodation space S, and at least a part of the inner surface of the hopper 17 is inclined so that the supply port extends outward. Is formed.

  The pusher 18 crushes and crushes the object 12 to be crushed supplied from the hopper 17 into the housing space S between the plurality of rotary blades 15 and the fixed blades 16 (FIGS. 1 and 2). The pressure part 18a which presses the to-be-crushed object 12, and the drive part 18b which reciprocates the press part 18a in the direction approaching with respect to the crushing area | region Q, and the direction pulled apart are provided.

Next, the crusher rotary blade mounting structure 22 will be described with reference to FIGS. 3 to 7.
As shown in FIG. 3, the crusher rotary blade attachment structure 22 is provided on the rotor 14, the attachment groove 20 formed on the surface of the rotor 14, the rotary blade 15 attached to the attachment groove 20, and the rotor 14. A screw hole 35, a fixing bolt 21 that fixes the rotary blade 15 to the mounting groove 20, and a movement blocking member 37 that blocks the movement of the rotary blade 15 are provided.

As shown in FIG. 3, the mounting groove 20 is a substantially V-shaped groove, and a groove 38 that accommodates the lower corner of the rotary blade 15 is formed at the bottom of the mounting groove 20.
Further, a substantially V-shaped concave portion 40 into which the fitting portion 39 of the movement preventing member 37 is fitted is formed at the rear end portion of the mounting groove 20, and the fitting portion 39 is formed at the bottom of the concave portion 40. A groove 38 is formed so as to accommodate the lower portion thereof.
A groove 41 is formed at the upper edge of the rear wall of the mounting groove 20.

As shown in FIG. 3, the rotary blade 15 has a blade base 42, a blade portion 43 provided at the tip of the blade base 42, and a contact portion 44 provided at the rear end portion of the blade base 42. doing.
The blade base 42 is a member having a substantially regular quadrangular prism shape, and a fixing bolt hole 45 extending in a diagonal direction is formed at a substantially central portion in the length direction of the blade base 42.
That is, the fixing bolt hole 45 is provided so as to pass through the ridge line portion 46 formed on the outer surface of the rotary blade 15 having a substantially regular quadrangular prism shape.

A first spot facing portion 47 is formed at one end of the fixing bolt hole 45, and a second spot facing portion 48 is formed at the other end of the fixing bolt hole 45.
That is, in the blade base 42, the “first state (FIG. 6)” in which the second counterbore portion 48 of the fixing bolt hole 45 faces the screw hole 35, and the first counterbore portion 47 of the fixing bolt hole 45 is the screw hole. It is configured to be able to selectively take a “second state (not shown)” that faces 35, and in any state, the rotary blade 15 can be fixed to the rotor 14 with the fixing bolt 21. ing.

As shown in FIG. 3, the blade portion 43 is formed in a substantially quadrangular shape so as to cover the entire tip surface of the blade base 42, and one end portion of the blade portion 43 in a direction parallel to the fixing bolt hole 45 ( The outer end portion in the radial direction of the rotor 14 is a first portion for crushing the object to be crushed 12 with the fixed blade 16 when the blade base 42 is in the “first state”.
The other end portion (the inner end portion in the radial direction of the rotor 14) of the blade portion 43 crushes the object 12 to be crushed with the fixed blade 16 when the blade base 42 is in the “second state”. It is the second part.

As shown in FIG. 4, the contact portion 44 is inclined so as to move away from the fixing bolt 21 toward the groove bottom side of the mounting groove 20 when the blade base 42 is in the “first state”. The stop surface 44a and the second locking surface 44b that inclines so as to approach the fixing bolt 21 toward the groove bottom side of the mounting groove 20 when the blade base 42 is in the “first state”. ing.
A diagonal line perpendicular to the fixing bolt hole 45 on the base end surface (rear end surface) of the blade base 42 is a boundary between the first locking surface 44a and the second locking surface 44b.

As shown in FIGS. 4 to 7, the movement preventing member 37 includes a fitting portion 39 fixed to the rotor 14 and a protruding portion 51 formed integrally with the fitting portion 39.
As shown in FIG. 4, the fitting portion 39 has a substantially V-shaped first contact surface 39 a that contacts the inner surface 40 a of the recess 40 and a substantially V-shaped contact that contacts the inner surface 20 a of the mounting groove 20. A stepped portion 53 having a second contact surface 39b is formed at the boundary between the first contact surface 39a and the second contact surface 39b.
In addition, a flat surface 39c is formed on the lower surface of the center portion in the width direction of the fitting portion 39, and an inclined surface 39d is formed on the lower surface of the rear portion of the fitting portion 39. Interference of the fitting part 39 is prevented.

On the other hand, the protruding portion 51 is a quadrangular frustum-shaped portion protruding from the surface of the rotor 14, and a pressing surface 51 a is formed on the side surface of the protruding portion 51 located on the blade base 42 side.
The pressing surface 51 a is formed so as to be inclined so that the first locking surface 44 a and the second locking surface 44 b are selectively brought into contact with each other and move away from the fixing bolt 21 toward the bottom surface side of the mounting groove 20. .
When the movement preventing member 37 is fixed to the rotor 14, the fitting portion 39 is fitted into the recess 40 with the step 53 of the movement preventing member 37 locked to the step 52 of the rotor 14. The movement preventing member 37 is welded to the rotor 14 at the groove 41 (FIG. 6).

  According to the crusher rotary blade mounting structure 22 configured as described above, even when the first portion (the one end portion) of the blade portion 43 is worn, the rotary blade 15 is mounted upside down. Since the second portion (the other end portion) can be used, the life of the blade portion 43 can be extended, and the replacement cycle of the rotary blade 15 can be lengthened to reduce the cost.

According to the crusher rotary blade mounting structure 22 configured as described above, when crushing the object 12 to be crushed between the rotary blade 15 and the fixed blade 16 (the counterpart tool), the object 12 to be crushed. Therefore, forces in various directions act on the rotary blade 15.
Therefore, if the movement prevention member 37 does not exist, the mounting position of the rotary blade 15 with respect to the rotor 14 (blade mounting portion) may be shifted. In such a case, the rotary blade 15 interferes with the fixed blade 16. The rotating blade 15 and the fixed blade 16 may be damaged.
However, by providing the movement blocking member 37, the movement blocking member 37 can be brought into contact with the contact portion 44 formed at the rear end portion of the rotary blade 15, so that the movement of the rotary blade 15 can be blocked. Breakage of the blade 15 and the fixed blade 16 can be prevented.

In addition, the shape of the blade base 42 in the rotary blade 15 is not specifically limited, For example, polygonal columnar bodies, such as a columnar body and a hexagonal columnar body, may be sufficient.
Moreover, the blade part 43 should just have the said 1st part and the said 2nd part at least, The shape may be changed suitably, and a 1st part and a 2nd part are mutually independent. It may be provided.
Furthermore, the contact part 44 and the movement prevention member 37 should just be comprised so that the movement of the rotary blade 15 can be blocked | prevented in any of a "1st state" and a "2nd state", and those shapes are suitably It may be changed.

Next, the operation of the crusher 11 configured as described above will be described with reference to FIG.
When crushing the object to be crushed 12 using the crusher 11 shown in FIG. 1, the drive motor is driven to rotate the rotor 14 in a predetermined direction, and the object to be crushed 12 is received from the supply port of the hopper 17. Supply to the inside of the space S.
Then, the pusher 18 can automatically operate to push the object 12 to be crushed into the crushing region Q.
As a result, the object to be crushed 12 can be sandwiched between the plurality of rotary blades 15 and the fixed blades 16 attached to the surface of the rotor 14, and the object to be crushed 12 can be sequentially sheared and crushed.
The crushed pieces q of the crushed object 12 are rotated and transferred by the blade portions 43 of the plurality of rotary blades 15 and dropped onto the screen 23.
When the crushed piece q is smaller than the large number of holes formed in the screen 23, the crushed piece q passes through the large number of holes and falls onto the conveying device provided below the broken piece q. Is transferred to the next step.

  However, when the crushed piece q is larger than each hole formed in the screen 23, the crushed piece q stays between the rotor 14 and the screen 23, so that it is pushed by each rotary blade 15 into the accommodation space S. Returned.

Next, the deformation | transformation suppression part 55 which is the characteristics of the rotary blade 15 for crushers which concerns on this invention is demonstrated with reference to each figure.
As shown in FIG. 5 and FIG. 6, the deformation suppressing portion 55 includes the opening edge portions 56 of the first counterbore portion 47 and the second counterbore portion 48 (fixed bolt hole 45) of the crusher rotary blade 15. Is provided.
More specifically, the deformation suppressing portion 55 is an intersecting portion 58 that intersects the ridge line portion 46 in each of the opening edge portions 56 of the first counterbore portion 47 and the second counterbore portion 48, and With respect to the rotation direction 19, the front crossing portion 58 and the back crossing portion 58 are provided.

That is, the deformation suppressing portion 55 is an inclined plane portion formed by removing the corner portion of the intersecting portion 58 as shown in FIGS.
This inclined plane portion is inclined at an angle of about 45 ° with respect to the horizontal direction in FIG.

  However, although the deformation | transformation suppression part 55 was formed as an inclined plane part, as shown in FIG.5 and FIG.6, it may replace with this and may be an inclined curved surface part which protrudes outside or is depressed inside.

  Moreover, the deformation | transformation suppression part 55 shown in this FIG. 6 is the state in which the rotary blade 15 was attached to the rotor 14 with the 1st counterbore part 47 (or 2nd counterbore part 48) facing outside. When the object to be crushed 12 is crushed by two, the two intersections 58 of the first counterbore part 47 (or the second counterbore part 48) are connected to the first counterbore part 47 (or the second counterbore part 48). The amount of protrusion of the inwardly projecting portion 100 (see FIG. 11) formed by deformation inside the opening inner peripheral surface 47a or 48a is determined by the inwardly projecting portion 100. In this configuration, the fixing bolt 21 is attached to and detached from the two counterbore portions 48) so as not to be caught by the head 21a.

Next, the operation of the crusher rotary blade 15 configured as described above will be described.
When the object 12 is sheared and crushed sequentially using the rotary blade 15 shown in FIGS. 6 and 7, the first counterbore portion 47 (or the second counterbore portion 48) formed on the rotary blade 15. Each crossing portion 58 intersecting with the ridge line portion 46 may be deformed by a collision with the object 12 to be crushed. Since each crossing portion 58 is provided with a deformation suppressing portion 55, the deformation suppressing portion 55 is The amount of protrusion of the inwardly convex portion 100 formed by each crossing portion 58 being deformed inwardly from the opening inner peripheral surface 47a or 48a of the first counterbore portion 47 (or the second counterbore portion 48), The inward convex portion 100 can be regulated to a size that does not catch on the head 21a when the fixing bolt 21 is attached to or detached from the first counterbore portion 47 (or the second counterbore portion 48).

  Accordingly, for example, when the rotary blade 15 is replaced or repaired, when the fixing bolt 21 is loosened and removed from the fixing bolt hole 45 including the first counterbore portion 47 (or the second counterbore portion 48), The fixing bolt 21 can be easily removed from the fixing bolt hole 45 including the first counterbore portion 47 (or the second counterbore portion 48) without being obstructed by the inward convex portion 100. As a result, the rotary blade 15 can be removed. Can be easily removed from the rotor 14 (blade mounting portion).

Therefore, for example, replacement work or repair work of the rotary blade 15 can be performed in a short time with little effort.
Thereby, the stop time of the crusher 11 can be shortened.

  As shown in FIGS. 6 and 7, the first counterbore 47 (or the second counterbore 48) has the head 21 a in a state where the head 21 a of the fixing bolt 21 is seated on the seat surface 60. Is formed at a height H arranged below the opening edge 56 of the first counterbore 47 (or the second counterbore 48).

In this manner, the crusher rotary blade 15 is attached to the rotor 14 with the fixing bolt 21, and the head 21 a of the fixing bolt 21 is placed on the seat surface 60 of the first counterbore portion 47 (or the second counterbore portion 48). When the upper end portion of the head portion 21a is placed below the opening edge portion 56 of the first counterbore portion 47 (or the second counterbore portion 48) in the seated state, the object 12 to be crushed is When shearing and crushing, the object 12 to be crushed toward the head 21a of the fixing bolt 21 collides with the outer surface of the rotary blade 15, and the possibility of collision with the head 21a of the fixing bolt 21 is reduced. can do.
Accordingly, the head 21a of the fixing bolt 21 can be prevented from being worn or deformed by colliding with the object 12 to be crushed.

As a result, the lowering of the engaging function of the engaging recess 21b such as a hexagonal hole for rotating the fixing bolt 21 by engaging a tool such as a hexagon wrench is provided on the head 21a of the fixing bolt 21. Can do.
That is, the engagement function of the engagement recess 21b for engaging the tool can be protected, and thereby the life of the fixing bolt 21 can be extended.
And since wear and a deformation | transformation of the head 21a of the fixing bolt 21 can be suppressed, the fall of the attachment intensity | strength with respect to the rotor 14 of the rotary blade 15 by the fixing bolt 21 can be suppressed.

Next, 2nd Embodiment of the rotary blade for crushers which concerns on this invention is described with reference to FIG.
The difference between the rotary blade 61 according to the second embodiment shown in FIG. 8 and the rotary blade 15 according to the first embodiment shown in FIG. 6 is that in the first embodiment shown in FIG. The mounting direction with respect to the rotor 14 can be changed up and down, and the first and second counterbore portions 47 and 48 are formed in both openings of the fixing bolt hole 45, respectively. In the second embodiment shown in FIG. 8, the mounting direction of the rotary blade 61 with respect to the rotor 14 cannot be changed up and down, and the first counterbore portion 47 is formed in one opening portion of the fixing bolt hole 45. Although formed, the second counterbore 48 is not formed in the other opening.

  Since other than this is the same as that of the first embodiment, the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

Thus, if only the first counterbore part 47 is formed in one opening of the fixing bolt hole 45, the depth dimension H of the first counterbore part 47 can be increased. The distance J between the upper end portion of the head 21a of the fixing bolt 21 and the opening edge portion 56 of the spot facing portion can be made sufficiently large.
Therefore, it is possible to sufficiently suppress the head 21 a of the fixing bolt 21 from being damaged due to collision or friction with the object to be crushed 12.

  In the rotary blade 61 shown in FIG. 8, the depth dimension H of the first counterbore portion 47 can be increased as in the rotary blade 15 shown in FIG. This is because there is no need to secure a thickness at which a necessary strength can be obtained as a distance between the surface 60 and the seat surface 60 of the second spot facing portion 48.

However, in the said embodiment, as shown in FIG. 6, the deformation | transformation suppression part 55 is the cross | intersection part 58 which cross | intersects each ridgeline part 46 of the 1st and 2nd counterbore parts 47, 48, Comprising: Although provided at both the front intersection portion 58 and the rear intersection portion 58 with respect to the rotation direction 19, it may be provided at either one of the intersection portions 58 instead.
Even in this case, the fixing bolt 21 can be easily removed from the fixing bolt hole 45 including the first counterbore portion 47 (or the second counterbore portion 48).

  In the above embodiment, the deformation suppressing portion 55 is provided at the intersecting portion 58 that intersects the ridge line portion 46 of the first and second counterbore portions 47 and 48. Instead, the first and second counterbore portions are provided. You may provide over the perimeter of the opening edge part 56 of the parts 47 and 48. FIG.

Moreover, in the said embodiment, as shown in FIG. 6, although the fixing bolt hole 45 containing the 1st and 2nd counterbore parts 47 and 48 was provided so that the ridgeline part 46 of the rotary blade 15 might be passed, Instead, it may be provided on the outer flat surface portion that is disengaged from the ridge line portion 46 of the rotary blade 15.
In this case, it is preferable to provide the deformation suppressing portion over the entire circumference of each opening edge portion of the first and second counterbore portions 47 and 48.

  Thus, when the fixing bolt hole 45 including the first and second counterbore portions 47 and 48 is provided so as to pass through the outer flat surface portion formed in the rotary blade 15, the first counterbore portion 47 ( Alternatively, the opening edge on the outer flat surface side of the second counterbore part 48) may have a small degree of deformation due to collision with the object 12 to be crushed, but such an opening edge is also provided with a deformation suppressing part. Thereby, the possibility that the removal of the fixing bolt 21 is obstructed by the inwardly protruding portion 100 formed at the opening edge portion can be further reduced.

  Further, the deformation suppressing portion 55 is in contrast to the inclined flat surface portion (or inclined curved surface portion) formed at the intersection 58 of the opening edge portions 56 of the first and second counterbore portions 47 and 48 shown in FIG. Alternatively, for example, induction hardening may be performed over the entire circumference of the opening edge portion 56 of each of the first and second counterbore portions 47 and 48.

If it does in this way, when the to-be-crushed object 12 is sheared and crushed, each crossing part 58 of the 1st counterbore part 47 (or 2nd counterbore part 48) or the opening edge part 56 will be the 1st counterbore part 47. The deformation amount in the direction toward the opening of (or the second counterbore part 48) can be reduced.
Accordingly, when the fixing bolt 21 is removed from the first counterbore portion 47 (or the second counterbore portion 48), the fixing bolt 21 is obstructed by the inward convex portion 100 formed at the intersection 58 or the opening edge portion 56. The possibility can be further reduced.

  And in the said embodiment, although this invention was applied to the uniaxial crusher, it may replace with this and may be applied to a biaxial crusher.

  As described above, the crusher rotary blade according to the present invention, the crusher provided with the crusher, and the crusher rotary blade mounting structure are fixed with the fixing bolt even after the crushing operation for shearing and crushing the material to be crushed. It is possible to easily remove from the bolt hole, and as a result, it has an excellent effect of easily removing the rotary blade from the blade mounting portion. Such a rotary blade for a crusher, a crusher including the crusher, and a crusher Suitable for application to machine rotary blade mounting structure.

11 Crusher 12 Object to be crushed 13 Casing 14 Rotor (blade mounting part)
14a Rotor body 14b Rotating shaft 15 Rotating blade 16 Fixed blade 17 Hopper 18 Pusher 18a Pressing portion 18b Driving portion 19 Predetermined direction (rotating direction)
DESCRIPTION OF SYMBOLS 20 Mounting groove 20a Inner side surface 21 Fixing bolt 21a Head 21b Engaging recessed part 22 Mounting structure of rotary blade for crusher 23 Screen 24 Joining part of fixed blade 25 Blade part of fixed blade 35 Screw hole 37 Movement prevention member 38 Groove 39 Fit Joint portion 39a First contact surface 39b Second contact surface 39c Flat surface 39d Inclined surface 40 Recess 40a Inner side surface 41 Groove 42 Blade base 43 Blade portion 44 Contact portion 44a First locking surface 44b Second locking surface 45 Fixing bolt hole 46 Ridge part 47 First counterbore part 47a Opening inner peripheral face 48 Second counterbore part 48a Opening inner peripheral face 51 Protruding part of the movement preventing member 51a Holding face 52, 53 Step 55 Deformation suppressing part 56 Opening edge Part 58 Crossing part 60 Seat face of counterbore part 61 Rotary blade 100 Inward convex part S Accommodating space Q Crushing area q Crushing piece

Claims (9)

It has a fixing bolt hole, and the fixing bolt is inserted into the fixing bolt hole. The fixing bolt is detachably attached to the rotating blade attaching portion, and the object to be crushed is moved between the other side cutter. In the crusher rotary blade capable of shear crushing,
The outer surface of the crusher rotary blade, provided with a deformation suppression portion at the opening edge of the fixing bolt hole,
The deformation suppressing portion is an inward convex formed by the opening edge portion being deformed inward from the inner peripheral surface of the fixing bolt hole when the object to be crushed is crushed by the rotary blade for the crusher. The rotary blade for a crusher is characterized in that the protruding amount of the portion is configured such that the inwardly protruding portion is restricted to a size that does not catch on the head when the fixing bolt is attached or detached.   The rotary blade for a crusher according to claim 1, wherein the deformation suppressing portion is an inclined flat surface portion or an inclined curved surface portion formed by removing a corner portion of the opening edge portion of the fixing bolt hole.   The deformation suppressing portion is obtained by quenching the inclined flat surface portion or the inclined curved surface portion formed at a corner portion of the opening edge portion of the fixing bolt hole. 2. A rotary blade for a crusher according to 2. The crusher rotary blade is formed in a substantially polygonal column shape, a blade portion is provided at the tip thereof,
The fixing bolt hole is provided so as to pass through a ridge line portion formed on an outer surface of the substantially polygonal column-shaped crusher rotary blade,
The deformation suppressing part is an intersection part intersecting with the ridge line part among the opening edge part on the ridge line part side of the fixing bolt hole, and is the front side based on the rotation direction of the rotary blade for the crusher. The rotary blade for a crusher according to any one of claims 1 to 3, wherein the rotary blade is provided at both of the intersecting portion and the intersecting portion on the rear side or at any one of the intersecting portions. The fixing bolt hole is provided so as to pass through an outer plane portion formed in the crusher rotary blade,
The crusher rotary blade according to any one of claims 1 to 3, wherein the deformation suppressing portion is provided at an opening edge portion of the outer flat portion of the fixing bolt hole. On the outer surface of the crusher rotary blade, an opening portion of the fixing bolt hole is formed with a counterbore portion,
The counterbore part is formed at a height such that the upper end of the head is positioned below the opening edge of the counterbore part with the head of the fixing bolt seated on the seating surface. The rotary blade for a crusher according to any one of claims 1 to 5, wherein the rotary blade is used. The mounting direction of the rotary blade for the crusher with respect to the blade mounting portion cannot be changed,
The rotary blade for a crusher according to claim 6, wherein the counterbore part is formed in one of the openings of the fixing bolt hole.   The crusher provided with the rotary blade for crushers in any one of Claims 1 thru | or 7. A rotary blade for a crusher according to any one of claims 1 to 7,
The rotary blade is fixedly attached to the blade attachment portion and abuts against the rear end portion of the rotary blade, and the rotary blade is prevented from moving by a force that acts when the rotary blade shears and crushes the object to be crushed. A structure for attaching a rotary blade for a crusher, comprising:

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