JP2010269261A - Cutting blade of shearing type crusher and shearing type crusher equipped with the cutting blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting blade which enables easy removal of a material to be crushed clogging the mounting hole of the cutting blade. <P>SOLUTION: Blade base portions mounted with a dividing type cutting blade and spacers are alternately provided in the axial directions of a plurality of rotary shafts, and a plurality of the rotary shafts are disposed so that the spacer and the cutting blade face each other and are engaged with each other. The cutting blade 1 has mounting holes 4, 5 for mounting the cutting blade to the blade base portion, and the mounting holes 4, 5 have inclined planes 10, 11, extending from a predetermined depth position 12 of the mounting holes 4, 5 to the outside of the outer periphery of the cutting blade in the front-back direction, in bolt insertion portions 8, 9. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cutting blade used in a shearing crusher and a shearing crusher provided with the cutting blade.

  Conventionally, a shearing type crusher is known as a crushing machine that crushes solid objects to be crushed such as plastic, wood pieces, paper, metal, rubber, fiber, and leather. As this shearing type crusher, for example, there is a shearing type crusher previously filed by the present applicant (see Patent Document 1).

  As shown in the plan view of the shearing type crusher in FIG. 12 and the XIII-XIII sectional view shown in FIG. 12 in FIG. 13, the shearing type crusher 100 has an axial direction of the rotary shafts 101 and 102. The plurality of rotary blades 103 are alternately provided so that the spacers 104 are sandwiched therebetween. The spacer 104 positions and fixes the rotary blade 103 in the axial direction, and is formed with an outer diameter capable of positioning the base portion of the rotary blade 103 in the axial direction.

  These rotary blades 103 have a blade base portion 106 fixed to the rotary shafts 101 and 102 and a split type cutting blade 105 fixed so as to surround the periphery of the blade base portion 106. Then, between the side surfaces of the rotary blade 103 that rotates in the rotation direction R, for example, an axial clearance of about 0.1 mm to 1 mm is provided, and the cutting blades 105 are wrapped so that they are engaged with each other. It is installed. The cutting blade 105 provided around the rotary blade 103 draws the object 120 to be crushed and crushes the object 120 to be crushed by a shearing action between the rotating blade 103 facing the cutting blade 105.

  Further, an engagement step portion 107 is provided on the mounting surface of the cutting blade 105 and is engaged with an engagement protrusion 108 provided on the blade base portion 106 so as to receive a crushing reaction force. This cutting blade 105 has a blade portion 109 that protrudes outward and is pointed in the rotational direction. When this blade portion 109 is worn early due to shearing crushing, etc., only the cutting blade 105 should be replaced. Can be done.

JP-A-8-323232

  By the way, in the case of this type of shearing type crusher, the cutting blade 105 is held between the spacers 104 as schematically shown in a side view in FIG. In this state, the rotating blade 105 is rotated between the spacer 104 and the cutting blade 105 (in the drawing, the outer peripheral circle is indicated by a two-dot chain line) opposed to each other. That is, when the cutting blade 105 is rotated, the blade 109 of the cutting blade 105 rotates in a state of being close to the cutting blade 105 facing and rotating with the axial gap of about 0.1 mm to 1 mm described above. , And rotates with the tip of the blade 109 close to the opposing spacer 104.

  Therefore, when the object 120 to be crushed by the cutting blade 105 passes through the space surrounded by the cutting blade 105 and the spacer 104, the periphery of the cutting blade 105 is set to the narrow gap as described above. The object 120 to be crushed enters the attachment hole 111 of the bolt 110 that attaches the cutting blade 105 to the blade base portion 106.

  And the to-be-crushed object 120 which entered this attachment hole 111 will be in the state where the to-be-crushed object 120 to be crushed one after another was laminated | stacked while being pressed by the spacer 104 opposedly arranged by rotation of the cutting blade 105, The object to be crushed 120 that is pressed and consolidated in the mounting hole 111 blocks the mounting hole 111 at the top of the bolt 110.

  In addition, when the object to be crushed 120 contains moisture, the object to be crushed 120 compacted in a state containing moisture dries in the stop time after the operation, so that the object to be crushed is repeatedly operated and stopped for several days. The object 120 may dry and become a strongly consolidated state.

  On the other hand, the cutting blade 105 is attached to the blade base portion 106 by a bolt 110 inserted into each mounting hole 111, and the cutting blade 105 can be replaced by removing the bolt 110. Therefore, in order to replace the cutting blade 105, it is necessary to remove the bolt 110, but in order to remove the bolt 110, the object 120 to be crushed compacted in the mounting hole 111 portion above the bolt 110 as described above is used. Must be removed.

  However, since the object 120 to be crushed in the mounting hole 111 is in close contact with the peripheral surface of the mounting hole 111 and is compacted in layers as described above, it is very firmly fixed. Is difficult to push between the mounting hole 111 and the object to be crushed 120, and even if it is pushed in, the object to be crushed 120 that is in close contact with the side wall of the attachment hole 111 is difficult to take out at once, and the object to be crushed consolidated in layers The operation of taking out 120 little by little is required, and it takes a lot of time and labor to remove the object 120 to be crushed in the mounting hole 111 portion of the bolt 110. Therefore, the operation of removing the mounting bolts 110 for replacing the cutting blade 105 reduces the operating rate of the crusher.

  Then, an object of this invention is to provide the cutting blade which can remove easily the to-be-crushed object with which the attachment hole of the cutting blade was jammed, and a shearing type crusher provided with the cutting blade.

  In order to achieve the above object, a cutting blade according to the present invention is provided by alternately providing a blade base portion and a spacer each having a split type cutting blade attached in the axial direction of a plurality of rotating shafts. A cutting blade of a shearing type crusher that disposes the plurality of rotating shafts so as to face and mesh with a cutting blade, and crushes an object to be crushed with the meshing cutting blade, It has a mounting hole to be attached to the blade base part, and the mounting hole has an inclined surface that extends from the predetermined depth position of the mounting hole to the front-rear direction outer surface of the outer periphery of the cutting blade in the bolt insertion part. And The “cutting blade outer periphery” in the document of this specification and the claims refers to the outer peripheral surface in the rotation direction of the cutting blade, and the “cutting blade inner periphery” refers to the inner peripheral surface in the rotation direction of the cutting blade. Further, in the “front-rear direction of the cutting blade outer periphery”, the rotation direction of the cutting blade is referred to as the front direction, and the counter-rotation direction is referred to as the rear direction. Thereby, even if an object to be crushed enters the bolt insertion portion in the mounting hole of the cutting blade that rotates with a narrow gap, the object to be crushed can be prevented from being clogged in the attachment hole by the inclined surface of the bolt insertion portion. Moreover, even if the object to be crushed is clogged in the mounting hole, the contact surface between the object to be crushed and the mounting hole becomes an inclined surface, so that it can be prevented from being strongly consolidated, and at the time of removal, A force in the direction opposite to the mounting hole acts on a certain inclined surface, and the object to be crushed can be easily removed from the mounting hole.

  Further, the cutting blade has an engagement step portion to be engaged with an engagement protrusion formed on the blade base portion on the inner periphery, and has a blade portion protruding from the central portion in the rotation direction on the outer periphery. The attachment hole may be provided at the front and rear positions in the rotational direction of the blade portion. If it does in this way, the position of the attachment hole with which the to-be-crushed object crushed with the blade part will be disperse | distributed to the front-back position of the rotation direction of a blade part, and the removal operation of the to-be-crushed object with which the attachment hole was clogged can be performed.

  Furthermore, the inclined surface may be inclined so as to expand from the depth position where the upper surface of the bolt head inserted into the mounting hole is substantially positioned toward the outer surface. In this way, the crushing object clogged up to the head of the bolt to which the cutting blade is attached can be easily removed. Therefore, the crushing object removing operation for removing the mounting bolt can be quickly performed to remove the bolt. The cutting blade replacement work can be performed efficiently.

  The inclined surface may have an inclined surface that extends in the thickness direction of the cutting blade. In this way, since the entire circumference of the mounting hole at the bolt insertion portion becomes an inclined surface that expands toward the outer surface, the mounting hole is further prevented from being clogged with the crushing object, and the clogged crushing object is further facilitated. Can be removed.

  Furthermore, the inclined surface may be formed as a tapered surface having an axis in a direction substantially orthogonal to the cutting blade outer surface at the position of the attachment hole. In this way, if the processing tool is moved at an angle orthogonal to the outer surface of the cutting blade, the inclined surface can be formed in the front-rear direction of the outer periphery of the cutting blade, and the inclined surface can be easily formed. .

  Further, the inclined surface may be formed with a larger inclination angle in the rear direction than in the front direction of the outer periphery of the cutting blade. If it does in this way, by the inclined surface in which the counter-rotation direction of the outer periphery of the cutting blade was formed with a large inclination angle, the crushing object is prevented from being caught in the rear of the crushing object in the flow direction, and clogging is suppressed. At the same time, even if clogged, it can be prevented from being consolidated.

  Further, the inclined surface may have a concave groove extending from the outer surface of the cutting blade toward the attachment hole along the inclined surface. In this way, even if the object to be crushed is clogged on the inclined surface, the object to be clogged can be removed by pushing a jig or the like into the concave groove.

  In addition, the concave groove may be formed in a tapered shape having a deep end on the outer surface side of the cutting blade and a shallow end on the attachment hole side. In this way, even if an object to be crushed is clogged on the inclined surface, a jig or the like can be easily pushed into the concave groove formed in a tapered shape, and the object to be crushed can be easily removed. .

  On the other hand, the shearing type crusher according to the present invention includes any one of the above cutting blades. As a result, when the cutting blade is replaced, the object to be crushed in the mounting hole can be easily removed, and the cutting blade can be replaced quickly.

  According to the present invention, it is possible to easily remove the object to be crushed in the bolt mounting hole when replacing the split type cutting blade, and it is possible to perform a quick cutting blade replacement operation.

It is drawing which shows the cutting blade concerning 1st Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is a top view. It is a perspective view of the cutting blade shown in FIG. It is drawing which shows typically the clogged state of the to-be-crushed object in the attachment hole of the cutting blade shown in FIG. 1, (a) is a side view, (b) is a partially expanded sectional view. It is drawing which shows the cutting blade concerning 2nd Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is a top view. It is a perspective view of the cutting blade shown in FIG. It is drawing which shows the cutting blade concerning 3rd Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is a top view. It is a perspective view of the cutting blade shown in FIG. It is drawing which shows the cutting blade which concerns on 4th Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is a top view. It is a perspective view of the cutting blade shown in FIG. It is drawing which shows the cutting blade concerning 5th Embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is a top view. It is a perspective view of the cutting blade shown in FIG. It is a top view which shows the conventional shearing type crusher. It is XIII-XIII sectional drawing shown in FIG. It is a side view which shows typically the clogged state of the to-be-crushed object in the attachment hole of the cutting blade shown in FIG.

  Hereinafter, embodiments of a cutting blade according to the present invention will be described with reference to the drawings. In these embodiments, the path of the machining tool is indicated by an arrow M in the plan view. In addition, it is the structure of the blade base part etc. which attach a cutting blade, Comprising: The same code | symbol is attached | subjected and demonstrated to the structure same as the structure mentioned above. Moreover, the cutting blade of embodiment shown below is an example, The cutting blade of another form may be sufficient.

  As shown in FIGS. 1 (a) and 1 (b) and FIG. 2, the cutting blade 1 according to the first embodiment rotates the engagement step portion 2 engaged with the blade base portion 106 (FIG. 3) on the inner periphery. It has in the direction rear part, and has the blade part 3 in the circumferential direction center part on the outer periphery. The blade portion 3 is pointed in the direction of rotation R shown in the figure, and mounting holes 4 and 5 are provided at circumferential positions in the circumferential direction of the blade portion 3. The attachment holes 4 and 5 are for attaching the cutting blade 1 to the blade base portion with attachment bolts 15 (FIG. 3), and the bolt seat portion 6 is formed at a predetermined depth. In the mounting holes 4 and 5 of this embodiment, a concave groove 7 is formed on the upper part of the bolt seat portion 6 to a predetermined dimension to hold a dedicated tool used when the cutting blade 1 is removed from the blade base portion 106. Yes.

  The bolt insertion portions 8 and 9 that are the outer peripheral portions of the mounting holes 4 and 5 are formed with inclined surfaces 10 and 11 that extend from the predetermined depth position 12 of the mounting holes 4 and 5 toward the outer surface. The predetermined depth position 12 is preferably substantially the upper surface position of the head of the mounting bolt 15 (FIG. 3). As shown in the plan view, the inclined surfaces 10 and 11 are inclined surfaces extending toward the outer surface in the front-rear direction (the left-right direction in FIG. 1 (b)) of the outer periphery of the cutting blade. The inclined surface extends in the thickness direction (vertical direction in FIG. 1 (b)). The inclined surfaces 10 and 11 may be inclined surfaces that extend at least in the front-rear direction of the rotation direction of the outer surface of the cutting blade.

  The inclined surfaces 10 and 11 are formed by moving the machining tool 16 as indicated by an arrow M shown in FIG. 1B after machining to form the bolt seat portion 6. A taper end mill is used as the processing tool 16. As the processing of the inclined surfaces 10 and 11 by the processing tool 16, the axis of the processing tool 16 is positioned on an axis substantially orthogonal to the outer surface of the cutting blade 1 at the positions of the mounting holes 4 and 5. Processing is performed by moving the cutting blade 1 in the circumferential direction and the thickness direction as indicated by an arrow M.

  In the example shown in the drawing, the tool hole D perpendicular to the outer surface of the mounting hole 4 in the circumferential front (left side in the figure) is tilted forward in the rotational direction with respect to the center line C of the mounting hole 4. Is the axis of the machining tool 16, and the inclined surface 10 is formed by moving the machining tool 16 as indicated by an arrow M. On the other hand, since the tool axis E perpendicular to the outer surface of the mounting hole 5 at the rear in the circumferential direction is inclined rearward in the rotational direction with respect to the center line of the mounting hole 5, the inclined axis E of the machining tool 16 is used. The inclined surface 11 is formed by moving the machining tool 16 as an arrow M as an axis. Moreover, when forming these inclined surfaces 10 and 11, you may make it process incline in the front-back direction according to the processing tool 16. FIG.

  Thereby, in the mounting hole 5 at the rear of the blade portion 3 in the rotation direction, the inclined surface 11 has a larger angle at the rear in the rotation direction than the angle at the front in the rotation direction, thereby catching the crushed object 120. It is possible to effectively prevent clogging of the crushed object 120 that flows into the mounting holes 4 and 5 while being compressed between the opposing spacers 104 (FIG. 3).

  As shown in FIG. 3 (a), according to the cutting blade 1 as described above, the crushed object 120 that has flowed to the positions of the mounting holes 4 and 5 is caught in the mounting holes 4 and 5 by the inclined surfaces 10 and 11. In addition, since the crushed object 120 has a flow, it is pulled out along the inclined surfaces 10 and 11, and the upper portions of the mounting holes 4 and 5 are not easily clogged.

  As shown in FIG. 3 (b), even if the object 120 is clogged in the mounting holes 4 and 5, the surrounding contact friction force is weakened by the inclined surfaces 10 and 11, so that the jig 17 If the object to be crushed (including a driver) is pushed in between the object to be crushed 120 and the inclined surface 11 (10), the object to be crushed 120 can be easily removed.

  That is, even if the crushed object 120 flows to the position of the mounting holes 4, 5, the inclined surfaces 10, 11 prevent clogging at the positions of the mounting holes 4, 5. Since the periphery of the crushed object 120 is in contact with the inclined surfaces 10 and 11, the crushed object 120 that has been previously clogged may be removed by pressing the crushed object 120 obliquely thereafter. 120 clogging can be effectively suppressed. Further, even if the object 120 to be crushed is clogged, the object 120 to be crushed is in contact with the surrounding inclined surfaces 10 and 11 with a weak frictional force and can be easily removed by the jig 17 or the like.

  Below, the example of the cutting blade of other forms is explained. As shown in FIGS. 4A and 4B and FIG. 5, the cutting blade 21 of the second embodiment has the same form as the cutting blade 1 of the first embodiment, but the inclined surface 10 is the same. 11 have a concave groove 22 for easily removing the object 120 (FIG. 3) clogged in the upper part of the mounting holes 4 and 5 with a jig or the like. Since other configurations are the same as those of the first embodiment, the same reference numerals are given to the same configurations, and detailed descriptions thereof are omitted.

  The concave groove 22 provided in the inclined surfaces 10 and 11 of the cutting blade 21 is provided in a concave shape having a predetermined depth from the outer surface of the cutting blade toward the mounting holes 4 and 5 along the inclined surfaces 10 and 11. . The concave groove 22 may be a groove having the same depth from the outer surface of the cutting blade 21 to the mounting hole as shown by a solid line, but the outer surface side end of the cutting blade 21 is deep as shown by a two-dot chain line, The end portions on the mounting holes 4 and 5 side may be formed in a shallow taper shape. If the concave groove 22 is provided, even if the object to be crushed 120 is clogged on the inclined surfaces 10 and 11, the object to be crushed 120 can be easily removed by pushing the jig 17 into the concave groove 22 and raising it. The concave groove 22 may have a concave shape such as a V-shaped or U-shaped cross section. Since other configurations are the same as those of the cutting blade 1 of the first embodiment, detailed description thereof is omitted.

  According to such a cutting blade 21, even if the object to be crushed 120 is clogged in the inclined surfaces 10, 11, the object to be crushed 120 and the inclined surface 10, by pushing the jig 17 into the concave groove 22 and raising it. Since the frictional resistance with 11 is small, the object 120 to be crushed can be easily removed from the inclined surfaces 10 and 11, and the exchanging work of the cutting blade 21 can be performed efficiently.

  Moreover, if the edge part of the cutting blade outer surface side of the concave groove 22 is deepened as described above, the jig 17 may be pushed in more easily. In this case, the clogging work 120 is removed. It can be done more efficiently.

  As shown in FIGS. 6A and 6B and FIG. 7, the cutting blade 31 of the third embodiment is the same as the cutting blade 31 of the second embodiment, but the concave groove 7 is not provided. In this example, the types of processing tools (not shown) for forming the inclined surfaces 33 and 34 are different. Since the other configuration is the same as that of the second embodiment, the same reference numeral is given to the same configuration, and the detailed description thereof is omitted.

  The cutting blade 31 is formed by forming the inclined surfaces 33 and 34 with a processing tool having a large taper angle, and the inclined angles of the inclined surfaces 33 and 34 are cut as compared with the inclined surfaces 10 and 11 of the second embodiment. It is greatly inclined in the front-rear direction of the outer periphery of the blade.

  According to such a cutting blade 31, the inclined surfaces 33 and 34 having a large inclination angle are formed from the head of the mounting bolt 15 inserted into the mounting holes 4 and 5 to the outer surface of the cutting blade 31. 120 clogging can be further suppressed. Further, since the concave groove 32 is also provided in this embodiment, even if the object to be crushed 120 is clogged in the inclined surfaces 33 and 34, it can be easily removed by pushing the jig 17 into the concave groove 32 and raising it. Can do.

  As shown in FIGS. 8 (a), (b) and FIG. 9, the cutting blade 41 of the fourth embodiment is a cutting blade having a thickness smaller than that of the cutting blade 1 of the first embodiment, and has a concave shape. In this example, there is no groove 7. Since the side surface form and the like are the same as those in the first embodiment, the same reference numerals are given to the same components, and detailed description thereof is omitted.

  Since the cutting blade 41 has a small thickness, the inclined surfaces 42 and 43 extending from the predetermined depth positions of the mounting holes 4 and 5 are formed so as to be inclined only in the front-rear direction (the left-right direction in FIG. 7) of the cutting blade 41. ing. The inclined surfaces 42 and 43 are moved while moving the machining tool back and forth in the circumferential direction of the cutting blade 41 as shown by an arrow M indicating the course of the machining tool shown in the drawing after machining to form the bolt seat portion 6. It is formed. A taper end mill is used as the processing tool.

  Even with such a cutting blade 41, even if the objects to be crushed 120 are clogged in the inclined surfaces 42, 43, the contact friction force between the object 120 to be crushed and the surroundings of the inclined surfaces 42, 43 is small. Thus, the object 120 can be easily removed.

  As shown in FIGS. 10A and 10B and FIG. 11, the cutting blade 51 of the fifth embodiment has a smaller protruding amount of the blade portion 3 than the cutting blade 41 of the fourth embodiment. A concave groove 52 for pushing the jig 17 into the inclined surfaces 42 and 43 is provided. Since other configurations are the same as those of the fourth embodiment, the same reference numerals are given to the same configurations, and detailed descriptions thereof are omitted.

  The concave groove 52 provided in the inclined surfaces 42 and 43 of the cutting blade 51 is provided in a concave shape having a predetermined depth from the outer surface of the cutting blade toward the mounting holes 4 and 5 along the inclined surfaces 42 and 43. . According to the concave groove 52, even if the object to be crushed 120 is clogged in the inclined surfaces 42 and 43, the object to be crushed 120 can be easily removed by pushing the jig 17 into the concave groove 52 and raising it. The concave groove 52 may also have a concave shape such as a V shape or a U shape in cross section.

  According to such a cutting blade 51, even if the object to be crushed 120 is clogged in the inclined surfaces 42, 43, the object to be crushed 120 and the inclined surface 42, Since the frictional resistance with 43 is small, the object 120 to be crushed can be easily removed from the inclined surfaces 42 and 43, and the cutting blade 51 can be exchanged efficiently.

  As described above, according to the cutting blades 1, 21, 31, 41, 51, even if the object 120 is clogged in the bolt insertion portions 8, 9 of the mounting holes 4, 5, Since it can be easily removed, replacement work of the cutting blades 1, 21, 31, 41, 51 can be performed efficiently and promptly. Therefore, a systematic operation of the crusher can be achieved while suppressing a decrease in the operating rate of the shear crusher.

  In the above-described embodiment, the cutting blades 1, 21, 31, 41, 51 having the same side surface shape have been described as an example. However, other embodiments can be applied in the same manner, and the cutting blade can be similarly applied. The thicknesses of 1, 21, 31, 41, 51 may also be different from those of the above embodiment, and the form of the cutting blades 1, 21, 31, 41, 51 is not limited to the above embodiment. .

  Furthermore, although the said cutting blades 21, 31, 51 demonstrated the structure which has the concave grooves 22, 32, 52 which latch a dedicated tool when removing, the cutting blades 1, 41 without this concave groove 22, 32, 52 were demonstrated. Even so, it is possible to easily remove the crushed object 120 clogged in the inclined surfaces 10, 11, 42, 43, and to improve the work efficiency even when there are no concave grooves 22, 32, 52, Whether or not the concave grooves 22, 32, 52 are provided may be set according to the use conditions.

  The above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention. The present invention is not limited to the above-described embodiment.

  The cutting blade according to the present invention is used in a shearing type crusher that shears and crushes solid objects to be crushed, such as plastic, wood pieces, paper, metal, rubber, fiber, and leather.

1 Cutting blade
2 Engagement step
3 Blade 4,5 Mounting hole
6 Bolt seat
7 concave groove 8, 9 bolt insertion portion 10, 11 inclined surface 12 predetermined depth position 15 mounting bolt 16 processing tool 17 jig 21 cutting blade 22 concave groove 31 cutting blade 32 concave groove 33, 34 inclined surface 41 cutting blade 42, 43 Inclined surface 51 Cutting blade 52 Concave groove

Claims (9)

In the axial direction of the plurality of rotating shafts, a blade base portion and a spacer, each having a split-type cutting blade attached thereto, are alternately provided, and the plurality of rotating shafts are configured so that the spacer and the cutting blade face each other. Is a cutting blade of a shearing type crusher that crushes the object to be crushed with the meshing cutting blade,
The cutting blade has an attachment hole to be attached to the blade base part,
The mounting hole has an inclined surface that extends from a predetermined depth position of the mounting hole toward a front-rear direction outer surface of the outer periphery of the cutting blade in the bolt insertion portion.   The cutting blade has an engagement step portion to be engaged with an engagement protrusion formed on the blade base portion on the inner periphery, and has a blade portion protruding from the central portion in the rotation direction on the outer periphery. The cutting blade according to claim 1, wherein the mounting hole is provided at a front and rear position in a rotation direction of the portion.   The cutting blade according to claim 1, wherein the inclined surface is inclined so as to expand toward an outer surface from a depth position where an upper surface of a bolt head inserted into the attachment hole is substantially located.   The cutting blade according to any one of claims 1 to 3, wherein the inclined surface has an inclined surface extending in a thickness direction of the cutting blade.   The cutting blade according to any one of claims 1 to 4, wherein the inclined surface is formed by a tapered surface having an axis in a direction substantially orthogonal to the outer surface of the cutting blade at the position of the attachment hole.   The cutting blade according to any one of claims 1 to 5, wherein the inclined surface is formed with a larger inclination angle in the rear direction than in the front direction of the outer periphery of the cutting blade.   The cutting blade according to claim 1, wherein the inclined surface has a concave groove extending from the outer surface of the cutting blade toward the attachment hole along the inclined surface.   The cutting blade according to any one of claims 1 to 7, wherein the concave groove is formed in a tapered shape in which an outer surface side end portion of the cutting blade is deep and an attachment hole side end portion is shallow.   A shear type crusher comprising the cutting blade according to claim 1.

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